drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.26k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98 /* Change firmware file name, using "-" and incrementing number,
  99  *   *only* when uCode interface or architecture changes so that it
 100  *   is not compatible with earlier drivers.
 101  * This number will also appear in << 8 position of 1st dword of uCode file */
 102 #define IWL3945_UCODE_API "-1"
 103
 104 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 105 MODULE_VERSION(DRV_VERSION);
 106 MODULE_AUTHOR(DRV_COPYRIGHT);
 107 MODULE_LICENSE("GPL");
 108
 109 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 110 {
 111         u16 fc = le16_to_cpu(hdr->frame_control);
 112         int hdr_len = ieee80211_get_hdrlen(fc);
 113
 114         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 115                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 116         return NULL;
 117 }
 118
 119 static const struct ieee80211_supported_band *iwl3945_get_band(
 120                 struct iwl3945_priv *priv, enum ieee80211_band band)
 121 {
 122         return priv->hw->wiphy->bands[band];
 123 }
 124
 125 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 126 {
 127         /* Single white space is for Linksys APs */
 128         if (essid_len == 1 && essid[0] == ' ')
 129                 return 1;
 130
 131         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 132         while (essid_len) {
 133                 essid_len--;
 134                 if (essid[essid_len] != '\0')
 135                         return 0;
 136         }
 137
 138         return 1;
 139 }
 140
 141 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 142 {
 143         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 144         const char *s = essid;
 145         char *d = escaped;
 146
 147         if (iwl3945_is_empty_essid(essid, essid_len)) {
 148                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 149                 return escaped;
 150         }
 151
 152         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 153         while (essid_len--) {
 154                 if (*s == '\0') {
 155                         *d++ = '\\';
 156                         *d++ = '0';
 157                         s++;
 158                 } else
 159                         *d++ = *s++;
 160         }
 161         *d = '\0';
 162         return escaped;
 163 }
 164
 165 static void iwl3945_print_hex_dump(int level, void *p, u32 len)
 166 {
 167 #ifdef CONFIG_IWL3945_DEBUG
 168         if (!(iwl3945_debug_level & level))
 169                 return;
 170
 171         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 172                         p, len, 1);
 173 #endif
 174 }
 175
 176 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 177  * DMA services
 178  *
 179  * Theory of operation
 180  *
 181  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 182  * of buffer descriptors, each of which points to one or more data buffers for
 183  * the device to read from or fill.  Driver and device exchange status of each
 184  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 185  * entries in each circular buffer, to protect against confusing empty and full
 186  * queue states.
 187  *
 188  * The device reads or writes the data in the queues via the device's several
 189  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 190  *
 191  * For Tx queue, there are low mark and high mark limits. If, after queuing
 192  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 193  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 194  * Tx queue resumed.
 195  *
 196  * The 3945 operates with six queues:  One receive queue, one transmit queue
 197  * (#4) for sending commands to the device firmware, and four transmit queues
 198  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 199  ***************************************************/
 200
 201 static int iwl3945_queue_space(const struct iwl3945_queue *q)
 202 {
 203         int s = q->read_ptr - q->write_ptr;
 204
 205         if (q->read_ptr > q->write_ptr)
 206                 s -= q->n_bd;
 207
 208         if (s <= 0)
 209                 s += q->n_window;
 210         /* keep some reserve to not confuse empty and full situations */
 211         s -= 2;
 212         if (s < 0)
 213                 s = 0;
 214         return s;
 215 }
 216
 217 /**
 218  * iwl3945_queue_inc_wrap - increment queue index, wrap back to beginning
 219  * @index -- current index
 220  * @n_bd -- total number of entries in queue (must be power of 2)
 221  */
 222 static inline int iwl3945_queue_inc_wrap(int index, int n_bd)
 223 {
 224         return ++index & (n_bd - 1);
 225 }
 226
 227 /**
 228  * iwl3945_queue_dec_wrap - increment queue index, wrap back to end
 229  * @index -- current index
 230  * @n_bd -- total number of entries in queue (must be power of 2)
 231  */
 232 static inline int iwl3945_queue_dec_wrap(int index, int n_bd)
 233 {
 234         return --index & (n_bd - 1);
 235 }
 236
 237 static inline int x2_queue_used(const struct iwl3945_queue *q, int i)
 238 {
 239         return q->write_ptr > q->read_ptr ?
 240                 (i >= q->read_ptr && i < q->write_ptr) :
 241                 !(i < q->read_ptr && i >= q->write_ptr);
 242 }
 243
 244 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 245 {
 246         /* This is for scan command, the big buffer at end of command array */
 247         if (is_huge)
 248                 return q->n_window;     /* must be power of 2 */
 249
 250         /* Otherwise, use normal size buffers */
 251         return index & (q->n_window - 1);
 252 }
 253
 254 /**
 255  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 256  */
 257 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 258                           int count, int slots_num, u32 id)
 259 {
 260         q->n_bd = count;
 261         q->n_window = slots_num;
 262         q->id = id;
 263
 264         /* count must be power-of-two size, otherwise iwl3945_queue_inc_wrap
 265          * and iwl3945_queue_dec_wrap are broken. */
 266         BUG_ON(!is_power_of_2(count));
 267
 268         /* slots_num must be power-of-two size, otherwise
 269          * get_cmd_index is broken. */
 270         BUG_ON(!is_power_of_2(slots_num));
 271
 272         q->low_mark = q->n_window / 4;
 273         if (q->low_mark < 4)
 274                 q->low_mark = 4;
 275
 276         q->high_mark = q->n_window / 8;
 277         if (q->high_mark < 2)
 278                 q->high_mark = 2;
 279
 280         q->write_ptr = q->read_ptr = 0;
 281
 282         return 0;
 283 }
 284
 285 /**
 286  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 287  */
 288 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 289                               struct iwl3945_tx_queue *txq, u32 id)
 290 {
 291         struct pci_dev *dev = priv->pci_dev;
 292
 293         /* Driver private data, only for Tx (not command) queues,
 294          * not shared with device. */
 295         if (id != IWL_CMD_QUEUE_NUM) {
 296                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 297                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 298                 if (!txq->txb) {
 299                         IWL_ERROR("kmalloc for auxiliary BD "
 300                                   "structures failed\n");
 301                         goto error;
 302                 }
 303         } else
 304                 txq->txb = NULL;
 305
 306         /* Circular buffer of transmit frame descriptors (TFDs),
 307          * shared with device */
 308         txq->bd = pci_alloc_consistent(dev,
 309                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 310                         &txq->q.dma_addr);
 311
 312         if (!txq->bd) {
 313                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 314                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 315                 goto error;
 316         }
 317         txq->q.id = id;
 318
 319         return 0;
 320
 321  error:
 322         if (txq->txb) {
 323                 kfree(txq->txb);
 324                 txq->txb = NULL;
 325         }
 326
 327         return -ENOMEM;
 328 }
 329
 330 /**
 331  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 332  */
 333 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 334                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 335 {
 336         struct pci_dev *dev = priv->pci_dev;
 337         int len;
 338         int rc = 0;
 339
 340         /*
 341          * Alloc buffer array for commands (Tx or other types of commands).
 342          * For the command queue (#4), allocate command space + one big
 343          * command for scan, since scan command is very huge; the system will
 344          * not have two scans at the same time, so only one is needed.
 345          * For data Tx queues (all other queues), no super-size command
 346          * space is needed.
 347          */
 348         len = sizeof(struct iwl3945_cmd) * slots_num;
 349         if (txq_id == IWL_CMD_QUEUE_NUM)
 350                 len +=  IWL_MAX_SCAN_SIZE;
 351         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 352         if (!txq->cmd)
 353                 return -ENOMEM;
 354
 355         /* Alloc driver data array and TFD circular buffer */
 356         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 357         if (rc) {
 358                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 359
 360                 return -ENOMEM;
 361         }
 362         txq->need_update = 0;
 363
 364         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 365          * iwl3945_queue_inc_wrap and iwl3945_queue_dec_wrap are broken. */
 366         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 367
 368         /* Initialize queue high/low-water, head/tail indexes */
 369         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 370
 371         /* Tell device where to find queue, enable DMA channel. */
 372         iwl3945_hw_tx_queue_init(priv, txq);
 373
 374         return 0;
 375 }
 376
 377 /**
 378  * iwl3945_tx_queue_free - Deallocate DMA queue.
 379  * @txq: Transmit queue to deallocate.
 380  *
 381  * Empty queue by removing and destroying all BD's.
 382  * Free all buffers.
 383  * 0-fill, but do not free "txq" descriptor structure.
 384  */
 385 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 386 {
 387         struct iwl3945_queue *q = &txq->q;
 388         struct pci_dev *dev = priv->pci_dev;
 389         int len;
 390
 391         if (q->n_bd == 0)
 392                 return;
 393
 394         /* first, empty all BD's */
 395         for (; q->write_ptr != q->read_ptr;
 396              q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd))
 397                 iwl3945_hw_txq_free_tfd(priv, txq);
 398
 399         len = sizeof(struct iwl3945_cmd) * q->n_window;
 400         if (q->id == IWL_CMD_QUEUE_NUM)
 401                 len += IWL_MAX_SCAN_SIZE;
 402
 403         /* De-alloc array of command/tx buffers */
 404         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 405
 406         /* De-alloc circular buffer of TFDs */
 407         if (txq->q.n_bd)
 408                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 409                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 410
 411         /* De-alloc array of per-TFD driver data */
 412         if (txq->txb) {
 413                 kfree(txq->txb);
 414                 txq->txb = NULL;
 415         }
 416
 417         /* 0-fill queue descriptor structure */
 418         memset(txq, 0, sizeof(*txq));
 419 }
 420
 421 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 422
 423 /*************** STATION TABLE MANAGEMENT ****
 424  * mac80211 should be examined to determine if sta_info is duplicating
 425  * the functionality provided here
 426  */
 427
 428 /**************************************************************/
 429 #if 0 /* temporary disable till we add real remove station */
 430 /**
 431  * iwl3945_remove_station - Remove driver's knowledge of station.
 432  *
 433  * NOTE:  This does not remove station from device's station table.
 434  */
 435 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 436 {
 437         int index = IWL_INVALID_STATION;
 438         int i;
 439         unsigned long flags;
 440
 441         spin_lock_irqsave(&priv->sta_lock, flags);
 442
 443         if (is_ap)
 444                 index = IWL_AP_ID;
 445         else if (is_broadcast_ether_addr(addr))
 446                 index = priv->hw_setting.bcast_sta_id;
 447         else
 448                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 449                         if (priv->stations[i].used &&
 450                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 451                                                 addr)) {
 452                                 index = i;
 453                                 break;
 454                         }
 455
 456         if (unlikely(index == IWL_INVALID_STATION))
 457                 goto out;
 458
 459         if (priv->stations[index].used) {
 460                 priv->stations[index].used = 0;
 461                 priv->num_stations--;
 462         }
 463
 464         BUG_ON(priv->num_stations < 0);
 465
 466 out:
 467         spin_unlock_irqrestore(&priv->sta_lock, flags);
 468         return 0;
 469 }
 470 #endif
 471
 472 /**
 473  * iwl3945_clear_stations_table - Clear the driver's station table
 474  *
 475  * NOTE:  This does not clear or otherwise alter the device's station table.
 476  */
 477 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 478 {
 479         unsigned long flags;
 480
 481         spin_lock_irqsave(&priv->sta_lock, flags);
 482
 483         priv->num_stations = 0;
 484         memset(priv->stations, 0, sizeof(priv->stations));
 485
 486         spin_unlock_irqrestore(&priv->sta_lock, flags);
 487 }
 488
 489 /**
 490  * iwl3945_add_station - Add station to station tables in driver and device
 491  */
 492 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 493 {
 494         int i;
 495         int index = IWL_INVALID_STATION;
 496         struct iwl3945_station_entry *station;
 497         unsigned long flags_spin;
 498         DECLARE_MAC_BUF(mac);
 499         u8 rate;
 500
 501         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 502         if (is_ap)
 503                 index = IWL_AP_ID;
 504         else if (is_broadcast_ether_addr(addr))
 505                 index = priv->hw_setting.bcast_sta_id;
 506         else
 507                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 508                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 509                                                 addr)) {
 510                                 index = i;
 511                                 break;
 512                         }
 513
 514                         if (!priv->stations[i].used &&
 515                             index == IWL_INVALID_STATION)
 516                                 index = i;
 517                 }
 518
 519         /* These two conditions has the same outcome but keep them separate
 520           since they have different meaning */
 521         if (unlikely(index == IWL_INVALID_STATION)) {
 522                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 523                 return index;
 524         }
 525
 526         if (priv->stations[index].used &&
 527            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 528                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 529                 return index;
 530         }
 531
 532         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 533         station = &priv->stations[index];
 534         station->used = 1;
 535         priv->num_stations++;
 536
 537         /* Set up the REPLY_ADD_STA command to send to device */
 538         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 539         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 540         station->sta.mode = 0;
 541         station->sta.sta.sta_id = index;
 542         station->sta.station_flags = 0;
 543
 544         if (priv->band == IEEE80211_BAND_5GHZ)
 545                 rate = IWL_RATE_6M_PLCP;
 546         else
 547                 rate =  IWL_RATE_1M_PLCP;
 548
 549         /* Turn on both antennas for the station... */
 550         station->sta.rate_n_flags =
 551                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 552         station->current_rate.rate_n_flags =
 553                         le16_to_cpu(station->sta.rate_n_flags);
 554
 555         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 556
 557         /* Add station to device's station table */
 558         iwl3945_send_add_station(priv, &station->sta, flags);
 559         return index;
 560
 561 }
 562
 563 /*************** DRIVER STATUS FUNCTIONS   *****/
 564
 565 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 566 {
 567         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 568          * set but EXIT_PENDING is not */
 569         return test_bit(STATUS_READY, &priv->status) &&
 570                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 571                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 572 }
 573
 574 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 575 {
 576         return test_bit(STATUS_ALIVE, &priv->status);
 577 }
 578
 579 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 580 {
 581         return test_bit(STATUS_INIT, &priv->status);
 582 }
 583
 584 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 585 {
 586         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 587                test_bit(STATUS_RF_KILL_SW, &priv->status);
 588 }
 589
 590 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 591 {
 592
 593         if (iwl3945_is_rfkill(priv))
 594                 return 0;
 595
 596         return iwl3945_is_ready(priv);
 597 }
 598
 599 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 600
 601 #define IWL_CMD(x) case x : return #x
 602
 603 static const char *get_cmd_string(u8 cmd)
 604 {
 605         switch (cmd) {
 606                 IWL_CMD(REPLY_ALIVE);
 607                 IWL_CMD(REPLY_ERROR);
 608                 IWL_CMD(REPLY_RXON);
 609                 IWL_CMD(REPLY_RXON_ASSOC);
 610                 IWL_CMD(REPLY_QOS_PARAM);
 611                 IWL_CMD(REPLY_RXON_TIMING);
 612                 IWL_CMD(REPLY_ADD_STA);
 613                 IWL_CMD(REPLY_REMOVE_STA);
 614                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 615                 IWL_CMD(REPLY_3945_RX);
 616                 IWL_CMD(REPLY_TX);
 617                 IWL_CMD(REPLY_RATE_SCALE);
 618                 IWL_CMD(REPLY_LEDS_CMD);
 619                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 620                 IWL_CMD(RADAR_NOTIFICATION);
 621                 IWL_CMD(REPLY_QUIET_CMD);
 622                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 623                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 624                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 625                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 626                 IWL_CMD(POWER_TABLE_CMD);
 627                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 628                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 629                 IWL_CMD(REPLY_SCAN_CMD);
 630                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 631                 IWL_CMD(SCAN_START_NOTIFICATION);
 632                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 633                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 634                 IWL_CMD(BEACON_NOTIFICATION);
 635                 IWL_CMD(REPLY_TX_BEACON);
 636                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 637                 IWL_CMD(QUIET_NOTIFICATION);
 638                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 639                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 640                 IWL_CMD(REPLY_BT_CONFIG);
 641                 IWL_CMD(REPLY_STATISTICS_CMD);
 642                 IWL_CMD(STATISTICS_NOTIFICATION);
 643                 IWL_CMD(REPLY_CARD_STATE_CMD);
 644                 IWL_CMD(CARD_STATE_NOTIFICATION);
 645                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 646         default:
 647                 return "UNKNOWN";
 648
 649         }
 650 }
 651
 652 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 653
 654 /**
 655  * iwl3945_enqueue_hcmd - enqueue a uCode command
 656  * @priv: device private data point
 657  * @cmd: a point to the ucode command structure
 658  *
 659  * The function returns < 0 values to indicate the operation is
 660  * failed. On success, it turns the index (> 0) of command in the
 661  * command queue.
 662  */
 663 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 664 {
 665         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 666         struct iwl3945_queue *q = &txq->q;
 667         struct iwl3945_tfd_frame *tfd;
 668         u32 *control_flags;
 669         struct iwl3945_cmd *out_cmd;
 670         u32 idx;
 671         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 672         dma_addr_t phys_addr;
 673         int pad;
 674         u16 count;
 675         int ret;
 676         unsigned long flags;
 677
 678         /* If any of the command structures end up being larger than
 679          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 680          * we will need to increase the size of the TFD entries */
 681         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 682                !(cmd->meta.flags & CMD_SIZE_HUGE));
 683
 684
 685         if (iwl3945_is_rfkill(priv)) {
 686                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 687                 return -EIO;
 688         }
 689
 690         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 691                 IWL_ERROR("No space for Tx\n");
 692                 return -ENOSPC;
 693         }
 694
 695         spin_lock_irqsave(&priv->hcmd_lock, flags);
 696
 697         tfd = &txq->bd[q->write_ptr];
 698         memset(tfd, 0, sizeof(*tfd));
 699
 700         control_flags = (u32 *) tfd;
 701
 702         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 703         out_cmd = &txq->cmd[idx];
 704
 705         out_cmd->hdr.cmd = cmd->id;
 706         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 707         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 708
 709         /* At this point, the out_cmd now has all of the incoming cmd
 710          * information */
 711
 712         out_cmd->hdr.flags = 0;
 713         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 714                         INDEX_TO_SEQ(q->write_ptr));
 715         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 716                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 717
 718         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 719                         offsetof(struct iwl3945_cmd, hdr);
 720         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 721
 722         pad = U32_PAD(cmd->len);
 723         count = TFD_CTL_COUNT_GET(*control_flags);
 724         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Increment and update queue's write index */
 735         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
 736         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 737
 738         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 739         return ret ? ret : idx;
 740 }
 741
 742 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 743 {
 744         int ret;
 745
 746         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 747
 748         /* An asynchronous command can not expect an SKB to be set. */
 749         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 750
 751         /* An asynchronous command MUST have a callback. */
 752         BUG_ON(!cmd->meta.u.callback);
 753
 754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 755                 return -EBUSY;
 756
 757         ret = iwl3945_enqueue_hcmd(priv, cmd);
 758         if (ret < 0) {
 759                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 760                           get_cmd_string(cmd->id), ret);
 761                 return ret;
 762         }
 763         return 0;
 764 }
 765
 766 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 767 {
 768         int cmd_idx;
 769         int ret;
 770         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 771
 772         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 773
 774          /* A synchronous command can not have a callback set. */
 775         BUG_ON(cmd->meta.u.callback != NULL);
 776
 777         if (atomic_xchg(&entry, 1)) {
 778                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 779                           get_cmd_string(cmd->id));
 780                 return -EBUSY;
 781         }
 782
 783         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 784
 785         if (cmd->meta.flags & CMD_WANT_SKB)
 786                 cmd->meta.source = &cmd->meta;
 787
 788         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 789         if (cmd_idx < 0) {
 790                 ret = cmd_idx;
 791                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 792                           get_cmd_string(cmd->id), ret);
 793                 goto out;
 794         }
 795
 796         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 797                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 798                         HOST_COMPLETE_TIMEOUT);
 799         if (!ret) {
 800                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 801                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 802                                   get_cmd_string(cmd->id),
 803                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 804
 805                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 806                         ret = -ETIMEDOUT;
 807                         goto cancel;
 808                 }
 809         }
 810
 811         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 812                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 813                                get_cmd_string(cmd->id));
 814                 ret = -ECANCELED;
 815                 goto fail;
 816         }
 817         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 818                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 819                                get_cmd_string(cmd->id));
 820                 ret = -EIO;
 821                 goto fail;
 822         }
 823         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 824                 IWL_ERROR("Error: Response NULL in '%s'\n",
 825                           get_cmd_string(cmd->id));
 826                 ret = -EIO;
 827                 goto out;
 828         }
 829
 830         ret = 0;
 831         goto out;
 832
 833 cancel:
 834         if (cmd->meta.flags & CMD_WANT_SKB) {
 835                 struct iwl3945_cmd *qcmd;
 836
 837                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 838                  * TX cmd queue. Otherwise in case the cmd comes
 839                  * in later, it will possibly set an invalid
 840                  * address (cmd->meta.source). */
 841                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 842                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 843         }
 844 fail:
 845         if (cmd->meta.u.skb) {
 846                 dev_kfree_skb_any(cmd->meta.u.skb);
 847                 cmd->meta.u.skb = NULL;
 848         }
 849 out:
 850         atomic_set(&entry, 0);
 851         return ret;
 852 }
 853
 854 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 855 {
 856         if (cmd->meta.flags & CMD_ASYNC)
 857                 return iwl3945_send_cmd_async(priv, cmd);
 858
 859         return iwl3945_send_cmd_sync(priv, cmd);
 860 }
 861
 862 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 863 {
 864         struct iwl3945_host_cmd cmd = {
 865                 .id = id,
 866                 .len = len,
 867                 .data = data,
 868         };
 869
 870         return iwl3945_send_cmd_sync(priv, &cmd);
 871 }
 872
 873 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 874 {
 875         struct iwl3945_host_cmd cmd = {
 876                 .id = id,
 877                 .len = sizeof(val),
 878                 .data = &val,
 879         };
 880
 881         return iwl3945_send_cmd_sync(priv, &cmd);
 882 }
 883
 884 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 885 {
 886         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 887 }
 888
 889 /**
 890  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @band: 2.4 or 5 GHz band
 892  * @channel: Any channel valid for the requested band
 893
 894  * In addition to setting the staging RXON, priv->band is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the band
 898  */
 899 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 900                                     enum ieee80211_band band,
 901                                     u16 channel)
 902 {
 903         if (!iwl3945_get_channel_info(priv, band, channel)) {
 904                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 905                                channel, band);
 906                 return -EINVAL;
 907         }
 908
 909         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 910             (priv->band == band))
 911                 return 0;
 912
 913         priv->staging_rxon.channel = cpu_to_le16(channel);
 914         if (band == IEEE80211_BAND_5GHZ)
 915                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 916         else
 917                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 918
 919         priv->band = band;
 920
 921         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 922
 923         return 0;
 924 }
 925
 926 /**
 927  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 928  *
 929  * NOTE:  This is really only useful during development and can eventually
 930  * be #ifdef'd out once the driver is stable and folks aren't actively
 931  * making changes
 932  */
 933 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 934 {
 935         int error = 0;
 936         int counter = 1;
 937
 938         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 939                 error |= le32_to_cpu(rxon->flags &
 940                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 941                                  RXON_FLG_RADAR_DETECT_MSK));
 942                 if (error)
 943                         IWL_WARNING("check 24G fields %d | %d\n",
 944                                     counter++, error);
 945         } else {
 946                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 947                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 948                 if (error)
 949                         IWL_WARNING("check 52 fields %d | %d\n",
 950                                     counter++, error);
 951                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 952                 if (error)
 953                         IWL_WARNING("check 52 CCK %d | %d\n",
 954                                     counter++, error);
 955         }
 956         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 957         if (error)
 958                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 959
 960         /* make sure basic rates 6Mbps and 1Mbps are supported */
 961         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 962                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 963         if (error)
 964                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 965
 966         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 967         if (error)
 968                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 969
 970         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 971                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 972         if (error)
 973                 IWL_WARNING("check CCK and short slot %d | %d\n",
 974                             counter++, error);
 975
 976         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 977                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 978         if (error)
 979                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 980                             counter++, error);
 981
 982         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 983                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 984         if (error)
 985                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 986                             counter++, error);
 987
 988         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 989                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 990                                 RXON_FLG_ANT_A_MSK)) == 0);
 991         if (error)
 992                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 993
 994         if (error)
 995                 IWL_WARNING("Tuning to channel %d\n",
 996                             le16_to_cpu(rxon->channel));
 997
 998         if (error) {
 999                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
1000                 return -1;
1001         }
1002         return 0;
1003 }
1004
1005 /**
1006  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1007  * @priv: staging_rxon is compared to active_rxon
1008  *
1009  * If the RXON structure is changing enough to require a new tune,
1010  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1011  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1012  */
1013 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
1014 {
1015
1016         /* These items are only settable from the full RXON command */
1017         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1018             compare_ether_addr(priv->staging_rxon.bssid_addr,
1019                                priv->active_rxon.bssid_addr) ||
1020             compare_ether_addr(priv->staging_rxon.node_addr,
1021                                priv->active_rxon.node_addr) ||
1022             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1023                                priv->active_rxon.wlap_bssid_addr) ||
1024             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1025             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1026             (priv->staging_rxon.air_propagation !=
1027              priv->active_rxon.air_propagation) ||
1028             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1029                 return 1;
1030
1031         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1032          * be updated with the RXON_ASSOC command -- however only some
1033          * flag transitions are allowed using RXON_ASSOC */
1034
1035         /* Check if we are not switching bands */
1036         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1037             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1038                 return 1;
1039
1040         /* Check if we are switching association toggle */
1041         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1042                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1043                 return 1;
1044
1045         return 0;
1046 }
1047
1048 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1049 {
1050         int rc = 0;
1051         struct iwl3945_rx_packet *res = NULL;
1052         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1053         struct iwl3945_host_cmd cmd = {
1054                 .id = REPLY_RXON_ASSOC,
1055                 .len = sizeof(rxon_assoc),
1056                 .meta.flags = CMD_WANT_SKB,
1057                 .data = &rxon_assoc,
1058         };
1059         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1060         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1061
1062         if ((rxon1->flags == rxon2->flags) &&
1063             (rxon1->filter_flags == rxon2->filter_flags) &&
1064             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1065             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1066                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1067                 return 0;
1068         }
1069
1070         rxon_assoc.flags = priv->staging_rxon.flags;
1071         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1072         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1073         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1074         rxon_assoc.reserved = 0;
1075
1076         rc = iwl3945_send_cmd_sync(priv, &cmd);
1077         if (rc)
1078                 return rc;
1079
1080         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1081         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1082                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1083                 rc = -EIO;
1084         }
1085
1086         priv->alloc_rxb_skb--;
1087         dev_kfree_skb_any(cmd.meta.u.skb);
1088
1089         return rc;
1090 }
1091
1092 /**
1093  * iwl3945_commit_rxon - commit staging_rxon to hardware
1094  *
1095  * The RXON command in staging_rxon is committed to the hardware and
1096  * the active_rxon structure is updated with the new data.  This
1097  * function correctly transitions out of the RXON_ASSOC_MSK state if
1098  * a HW tune is required based on the RXON structure changes.
1099  */
1100 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1101 {
1102         /* cast away the const for active_rxon in this function */
1103         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1104         int rc = 0;
1105         DECLARE_MAC_BUF(mac);
1106
1107         if (!iwl3945_is_alive(priv))
1108                 return -1;
1109
1110         /* always get timestamp with Rx frame */
1111         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1112
1113         /* select antenna */
1114         priv->staging_rxon.flags &=
1115             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1116         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1117
1118         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1119         if (rc) {
1120                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1121                 return -EINVAL;
1122         }
1123
1124         /* If we don't need to send a full RXON, we can use
1125          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1126          * and other flags for the current radio configuration. */
1127         if (!iwl3945_full_rxon_required(priv)) {
1128                 rc = iwl3945_send_rxon_assoc(priv);
1129                 if (rc) {
1130                         IWL_ERROR("Error setting RXON_ASSOC "
1131                                   "configuration (%d).\n", rc);
1132                         return rc;
1133                 }
1134
1135                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1136
1137                 return 0;
1138         }
1139
1140         /* If we are currently associated and the new config requires
1141          * an RXON_ASSOC and the new config wants the associated mask enabled,
1142          * we must clear the associated from the active configuration
1143          * before we apply the new config */
1144         if (iwl3945_is_associated(priv) &&
1145             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1146                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1147                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1148
1149                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1150                                       sizeof(struct iwl3945_rxon_cmd),
1151                                       &priv->active_rxon);
1152
1153                 /* If the mask clearing failed then we set
1154                  * active_rxon back to what it was previously */
1155                 if (rc) {
1156                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1157                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1158                                   "configuration (%d).\n", rc);
1159                         return rc;
1160                 }
1161         }
1162
1163         IWL_DEBUG_INFO("Sending RXON\n"
1164                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1165                        "* channel = %d\n"
1166                        "* bssid = %s\n",
1167                        ((priv->staging_rxon.filter_flags &
1168                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1169                        le16_to_cpu(priv->staging_rxon.channel),
1170                        print_mac(mac, priv->staging_rxon.bssid_addr));
1171
1172         /* Apply the new configuration */
1173         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1174                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1175         if (rc) {
1176                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1177                 return rc;
1178         }
1179
1180         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1181
1182         iwl3945_clear_stations_table(priv);
1183
1184         /* If we issue a new RXON command which required a tune then we must
1185          * send a new TXPOWER command or we won't be able to Tx any frames */
1186         rc = iwl3945_hw_reg_send_txpower(priv);
1187         if (rc) {
1188                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1189                 return rc;
1190         }
1191
1192         /* Add the broadcast address so we can send broadcast frames */
1193         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1194             IWL_INVALID_STATION) {
1195                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1196                 return -EIO;
1197         }
1198
1199         /* If we have set the ASSOC_MSK and we are in BSS mode then
1200          * add the IWL_AP_ID to the station rate table */
1201         if (iwl3945_is_associated(priv) &&
1202             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1203                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1204                     == IWL_INVALID_STATION) {
1205                         IWL_ERROR("Error adding AP address for transmit.\n");
1206                         return -EIO;
1207                 }
1208
1209         /* Init the hardware's rate fallback order based on the band */
1210         rc = iwl3945_init_hw_rate_table(priv);
1211         if (rc) {
1212                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1213                 return -EIO;
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1220 {
1221         struct iwl3945_bt_cmd bt_cmd = {
1222                 .flags = 3,
1223                 .lead_time = 0xAA,
1224                 .max_kill = 1,
1225                 .kill_ack_mask = 0,
1226                 .kill_cts_mask = 0,
1227         };
1228
1229         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1230                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1231 }
1232
1233 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1234 {
1235         int rc = 0;
1236         struct iwl3945_rx_packet *res;
1237         struct iwl3945_host_cmd cmd = {
1238                 .id = REPLY_SCAN_ABORT_CMD,
1239                 .meta.flags = CMD_WANT_SKB,
1240         };
1241
1242         /* If there isn't a scan actively going on in the hardware
1243          * then we are in between scan bands and not actually
1244          * actively scanning, so don't send the abort command */
1245         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1246                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1247                 return 0;
1248         }
1249
1250         rc = iwl3945_send_cmd_sync(priv, &cmd);
1251         if (rc) {
1252                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1253                 return rc;
1254         }
1255
1256         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1257         if (res->u.status != CAN_ABORT_STATUS) {
1258                 /* The scan abort will return 1 for success or
1259                  * 2 for "failure".  A failure condition can be
1260                  * due to simply not being in an active scan which
1261                  * can occur if we send the scan abort before we
1262                  * the microcode has notified us that a scan is
1263                  * completed. */
1264                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1265                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1266                 clear_bit(STATUS_SCAN_HW, &priv->status);
1267         }
1268
1269         dev_kfree_skb_any(cmd.meta.u.skb);
1270
1271         return rc;
1272 }
1273
1274 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1275                                         struct iwl3945_cmd *cmd,
1276                                         struct sk_buff *skb)
1277 {
1278         return 1;
1279 }
1280
1281 /*
1282  * CARD_STATE_CMD
1283  *
1284  * Use: Sets the device's internal card state to enable, disable, or halt
1285  *
1286  * When in the 'enable' state the card operates as normal.
1287  * When in the 'disable' state, the card enters into a low power mode.
1288  * When in the 'halt' state, the card is shut down and must be fully
1289  * restarted to come back on.
1290  */
1291 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1292 {
1293         struct iwl3945_host_cmd cmd = {
1294                 .id = REPLY_CARD_STATE_CMD,
1295                 .len = sizeof(u32),
1296                 .data = &flags,
1297                 .meta.flags = meta_flag,
1298         };
1299
1300         if (meta_flag & CMD_ASYNC)
1301                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1302
1303         return iwl3945_send_cmd(priv, &cmd);
1304 }
1305
1306 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1307                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1308 {
1309         struct iwl3945_rx_packet *res = NULL;
1310
1311         if (!skb) {
1312                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1313                 return 1;
1314         }
1315
1316         res = (struct iwl3945_rx_packet *)skb->data;
1317         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1318                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1319                           res->hdr.flags);
1320                 return 1;
1321         }
1322
1323         switch (res->u.add_sta.status) {
1324         case ADD_STA_SUCCESS_MSK:
1325                 break;
1326         default:
1327                 break;
1328         }
1329
1330         /* We didn't cache the SKB; let the caller free it */
1331         return 1;
1332 }
1333
1334 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1335                          struct iwl3945_addsta_cmd *sta, u8 flags)
1336 {
1337         struct iwl3945_rx_packet *res = NULL;
1338         int rc = 0;
1339         struct iwl3945_host_cmd cmd = {
1340                 .id = REPLY_ADD_STA,
1341                 .len = sizeof(struct iwl3945_addsta_cmd),
1342                 .meta.flags = flags,
1343                 .data = sta,
1344         };
1345
1346         if (flags & CMD_ASYNC)
1347                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1348         else
1349                 cmd.meta.flags |= CMD_WANT_SKB;
1350
1351         rc = iwl3945_send_cmd(priv, &cmd);
1352
1353         if (rc || (flags & CMD_ASYNC))
1354                 return rc;
1355
1356         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1357         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1358                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1359                           res->hdr.flags);
1360                 rc = -EIO;
1361         }
1362
1363         if (rc == 0) {
1364                 switch (res->u.add_sta.status) {
1365                 case ADD_STA_SUCCESS_MSK:
1366                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1367                         break;
1368                 default:
1369                         rc = -EIO;
1370                         IWL_WARNING("REPLY_ADD_STA failed\n");
1371                         break;
1372                 }
1373         }
1374
1375         priv->alloc_rxb_skb--;
1376         dev_kfree_skb_any(cmd.meta.u.skb);
1377
1378         return rc;
1379 }
1380
1381 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1382                                    struct ieee80211_key_conf *keyconf,
1383                                    u8 sta_id)
1384 {
1385         unsigned long flags;
1386         __le16 key_flags = 0;
1387
1388         switch (keyconf->alg) {
1389         case ALG_CCMP:
1390                 key_flags |= STA_KEY_FLG_CCMP;
1391                 key_flags |= cpu_to_le16(
1392                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1393                 key_flags &= ~STA_KEY_FLG_INVALID;
1394                 break;
1395         case ALG_TKIP:
1396         case ALG_WEP:
1397         default:
1398                 return -EINVAL;
1399         }
1400         spin_lock_irqsave(&priv->sta_lock, flags);
1401         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1402         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1403         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1404                keyconf->keylen);
1405
1406         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1407                keyconf->keylen);
1408         priv->stations[sta_id].sta.key.key_flags = key_flags;
1409         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1410         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1411
1412         spin_unlock_irqrestore(&priv->sta_lock, flags);
1413
1414         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1415         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1416         return 0;
1417 }
1418
1419 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1420 {
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&priv->sta_lock, flags);
1424         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1425         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1426         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1427         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1428         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1429         spin_unlock_irqrestore(&priv->sta_lock, flags);
1430
1431         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1432         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1433         return 0;
1434 }
1435
1436 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1437 {
1438         struct list_head *element;
1439
1440         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1441                        priv->frames_count);
1442
1443         while (!list_empty(&priv->free_frames)) {
1444                 element = priv->free_frames.next;
1445                 list_del(element);
1446                 kfree(list_entry(element, struct iwl3945_frame, list));
1447                 priv->frames_count--;
1448         }
1449
1450         if (priv->frames_count) {
1451                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1452                             priv->frames_count);
1453                 priv->frames_count = 0;
1454         }
1455 }
1456
1457 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1458 {
1459         struct iwl3945_frame *frame;
1460         struct list_head *element;
1461         if (list_empty(&priv->free_frames)) {
1462                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1463                 if (!frame) {
1464                         IWL_ERROR("Could not allocate frame!\n");
1465                         return NULL;
1466                 }
1467
1468                 priv->frames_count++;
1469                 return frame;
1470         }
1471
1472         element = priv->free_frames.next;
1473         list_del(element);
1474         return list_entry(element, struct iwl3945_frame, list);
1475 }
1476
1477 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1478 {
1479         memset(frame, 0, sizeof(*frame));
1480         list_add(&frame->list, &priv->free_frames);
1481 }
1482
1483 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1484                                 struct ieee80211_hdr *hdr,
1485                                 const u8 *dest, int left)
1486 {
1487
1488         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1489             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1490              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1491                 return 0;
1492
1493         if (priv->ibss_beacon->len > left)
1494                 return 0;
1495
1496         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1497
1498         return priv->ibss_beacon->len;
1499 }
1500
1501 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1502 {
1503         u8 i;
1504
1505         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1506              i = iwl3945_rates[i].next_ieee) {
1507                 if (rate_mask & (1 << i))
1508                         return iwl3945_rates[i].plcp;
1509         }
1510
1511         return IWL_RATE_INVALID;
1512 }
1513
1514 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1515 {
1516         struct iwl3945_frame *frame;
1517         unsigned int frame_size;
1518         int rc;
1519         u8 rate;
1520
1521         frame = iwl3945_get_free_frame(priv);
1522
1523         if (!frame) {
1524                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1525                           "command.\n");
1526                 return -ENOMEM;
1527         }
1528
1529         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1530                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1531                                                 0xFF0);
1532                 if (rate == IWL_INVALID_RATE)
1533                         rate = IWL_RATE_6M_PLCP;
1534         } else {
1535                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1536                 if (rate == IWL_INVALID_RATE)
1537                         rate = IWL_RATE_1M_PLCP;
1538         }
1539
1540         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1541
1542         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1543                               &frame->u.cmd[0]);
1544
1545         iwl3945_free_frame(priv, frame);
1546
1547         return rc;
1548 }
1549
1550 /******************************************************************************
1551  *
1552  * EEPROM related functions
1553  *
1554  ******************************************************************************/
1555
1556 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1557 {
1558         memcpy(mac, priv->eeprom.mac_address, 6);
1559 }
1560
1561 /*
1562  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1563  * embedded controller) as EEPROM reader; each read is a series of pulses
1564  * to/from the EEPROM chip, not a single event, so even reads could conflict
1565  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1566  * simply claims ownership, which should be safe when this function is called
1567  * (i.e. before loading uCode!).
1568  */
1569 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1570 {
1571         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1572         return 0;
1573 }
1574
1575 /**
1576  * iwl3945_eeprom_init - read EEPROM contents
1577  *
1578  * Load the EEPROM contents from adapter into priv->eeprom
1579  *
1580  * NOTE:  This routine uses the non-debug IO access functions.
1581  */
1582 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1583 {
1584         u16 *e = (u16 *)&priv->eeprom;
1585         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1586         u32 r;
1587         int sz = sizeof(priv->eeprom);
1588         int rc;
1589         int i;
1590         u16 addr;
1591
1592         /* The EEPROM structure has several padding buffers within it
1593          * and when adding new EEPROM maps is subject to programmer errors
1594          * which may be very difficult to identify without explicitly
1595          * checking the resulting size of the eeprom map. */
1596         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1597
1598         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1599                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1600                 return -ENOENT;
1601         }
1602
1603         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1604         rc = iwl3945_eeprom_acquire_semaphore(priv);
1605         if (rc < 0) {
1606                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1607                 return -ENOENT;
1608         }
1609
1610         /* eeprom is an array of 16bit values */
1611         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1612                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1613                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1614
1615                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1616                                         i += IWL_EEPROM_ACCESS_DELAY) {
1617                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1618                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1619                                 break;
1620                         udelay(IWL_EEPROM_ACCESS_DELAY);
1621                 }
1622
1623                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1624                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1625                         return -ETIMEDOUT;
1626                 }
1627                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1628         }
1629
1630         return 0;
1631 }
1632
1633 /******************************************************************************
1634  *
1635  * Misc. internal state and helper functions
1636  *
1637  ******************************************************************************/
1638 #ifdef CONFIG_IWL3945_DEBUG
1639
1640 /**
1641  * iwl3945_report_frame - dump frame to syslog during debug sessions
1642  *
1643  * You may hack this function to show different aspects of received frames,
1644  * including selective frame dumps.
1645  * group100 parameter selects whether to show 1 out of 100 good frames.
1646  */
1647 void iwl3945_report_frame(struct iwl3945_priv *priv,
1648                       struct iwl3945_rx_packet *pkt,
1649                       struct ieee80211_hdr *header, int group100)
1650 {
1651         u32 to_us;
1652         u32 print_summary = 0;
1653         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1654         u32 hundred = 0;
1655         u32 dataframe = 0;
1656         u16 fc;
1657         u16 seq_ctl;
1658         u16 channel;
1659         u16 phy_flags;
1660         int rate_sym;
1661         u16 length;
1662         u16 status;
1663         u16 bcn_tmr;
1664         u32 tsf_low;
1665         u64 tsf;
1666         u8 rssi;
1667         u8 agc;
1668         u16 sig_avg;
1669         u16 noise_diff;
1670         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1671         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1672         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
1673         u8 *data = IWL_RX_DATA(pkt);
1674
1675         /* MAC header */
1676         fc = le16_to_cpu(header->frame_control);
1677         seq_ctl = le16_to_cpu(header->seq_ctrl);
1678
1679         /* metadata */
1680         channel = le16_to_cpu(rx_hdr->channel);
1681         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1682         rate_sym = rx_hdr->rate;
1683         length = le16_to_cpu(rx_hdr->len);
1684
1685         /* end-of-frame status and timestamp */
1686         status = le32_to_cpu(rx_end->status);
1687         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1688         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1689         tsf = le64_to_cpu(rx_end->timestamp);
1690
1691         /* signal statistics */
1692         rssi = rx_stats->rssi;
1693         agc = rx_stats->agc;
1694         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1695         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1696
1697         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1698
1699         /* if data frame is to us and all is good,
1700          *   (optionally) print summary for only 1 out of every 100 */
1701         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1702             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1703                 dataframe = 1;
1704                 if (!group100)
1705                         print_summary = 1;      /* print each frame */
1706                 else if (priv->framecnt_to_us < 100) {
1707                         priv->framecnt_to_us++;
1708                         print_summary = 0;
1709                 } else {
1710                         priv->framecnt_to_us = 0;
1711                         print_summary = 1;
1712                         hundred = 1;
1713                 }
1714         } else {
1715                 /* print summary for all other frames */
1716                 print_summary = 1;
1717         }
1718
1719         if (print_summary) {
1720                 char *title;
1721                 u32 rate;
1722
1723                 if (hundred)
1724                         title = "100Frames";
1725                 else if (fc & IEEE80211_FCTL_RETRY)
1726                         title = "Retry";
1727                 else if (ieee80211_is_assoc_response(fc))
1728                         title = "AscRsp";
1729                 else if (ieee80211_is_reassoc_response(fc))
1730                         title = "RasRsp";
1731                 else if (ieee80211_is_probe_response(fc)) {
1732                         title = "PrbRsp";
1733                         print_dump = 1; /* dump frame contents */
1734                 } else if (ieee80211_is_beacon(fc)) {
1735                         title = "Beacon";
1736                         print_dump = 1; /* dump frame contents */
1737                 } else if (ieee80211_is_atim(fc))
1738                         title = "ATIM";
1739                 else if (ieee80211_is_auth(fc))
1740                         title = "Auth";
1741                 else if (ieee80211_is_deauth(fc))
1742                         title = "DeAuth";
1743                 else if (ieee80211_is_disassoc(fc))
1744                         title = "DisAssoc";
1745                 else
1746                         title = "Frame";
1747
1748                 rate = iwl3945_rate_index_from_plcp(rate_sym);
1749                 if (rate == -1)
1750                         rate = 0;
1751                 else
1752                         rate = iwl3945_rates[rate].ieee / 2;
1753
1754                 /* print frame summary.
1755                  * MAC addresses show just the last byte (for brevity),
1756                  *    but you can hack it to show more, if you'd like to. */
1757                 if (dataframe)
1758                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1759                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1760                                      title, fc, header->addr1[5],
1761                                      length, rssi, channel, rate);
1762                 else {
1763                         /* src/dst addresses assume managed mode */
1764                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1765                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1766                                      "phy=0x%02x, chnl=%d\n",
1767                                      title, fc, header->addr1[5],
1768                                      header->addr3[5], rssi,
1769                                      tsf_low - priv->scan_start_tsf,
1770                                      phy_flags, channel);
1771                 }
1772         }
1773         if (print_dump)
1774                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
1775 }
1776 #endif
1777
1778 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1779 {
1780         if (priv->hw_setting.shared_virt)
1781                 pci_free_consistent(priv->pci_dev,
1782                                     sizeof(struct iwl3945_shared),
1783                                     priv->hw_setting.shared_virt,
1784                                     priv->hw_setting.shared_phys);
1785 }
1786
1787 /**
1788  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1789  *
1790  * return : set the bit for each supported rate insert in ie
1791  */
1792 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1793                                     u16 basic_rate, int *left)
1794 {
1795         u16 ret_rates = 0, bit;
1796         int i;
1797         u8 *cnt = ie;
1798         u8 *rates = ie + 1;
1799
1800         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1801                 if (bit & supported_rate) {
1802                         ret_rates |= bit;
1803                         rates[*cnt] = iwl3945_rates[i].ieee |
1804                                 ((bit & basic_rate) ? 0x80 : 0x00);
1805                         (*cnt)++;
1806                         (*left)--;
1807                         if ((*left <= 0) ||
1808                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1809                                 break;
1810                 }
1811         }
1812
1813         return ret_rates;
1814 }
1815
1816 /**
1817  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1818  */
1819 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1820                               struct ieee80211_mgmt *frame,
1821                               int left, int is_direct)
1822 {
1823         int len = 0;
1824         u8 *pos = NULL;
1825         u16 active_rates, ret_rates, cck_rates;
1826
1827         /* Make sure there is enough space for the probe request,
1828          * two mandatory IEs and the data */
1829         left -= 24;
1830         if (left < 0)
1831                 return 0;
1832         len += 24;
1833
1834         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1835         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1836         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1837         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1838         frame->seq_ctrl = 0;
1839
1840         /* fill in our indirect SSID IE */
1841         /* ...next IE... */
1842
1843         left -= 2;
1844         if (left < 0)
1845                 return 0;
1846         len += 2;
1847         pos = &(frame->u.probe_req.variable[0]);
1848         *pos++ = WLAN_EID_SSID;
1849         *pos++ = 0;
1850
1851         /* fill in our direct SSID IE... */
1852         if (is_direct) {
1853                 /* ...next IE... */
1854                 left -= 2 + priv->essid_len;
1855                 if (left < 0)
1856                         return 0;
1857                 /* ... fill it in... */
1858                 *pos++ = WLAN_EID_SSID;
1859                 *pos++ = priv->essid_len;
1860                 memcpy(pos, priv->essid, priv->essid_len);
1861                 pos += priv->essid_len;
1862                 len += 2 + priv->essid_len;
1863         }
1864
1865         /* fill in supported rate */
1866         /* ...next IE... */
1867         left -= 2;
1868         if (left < 0)
1869                 return 0;
1870
1871         /* ... fill it in... */
1872         *pos++ = WLAN_EID_SUPP_RATES;
1873         *pos = 0;
1874
1875         priv->active_rate = priv->rates_mask;
1876         active_rates = priv->active_rate;
1877         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1878
1879         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1880         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1881                         priv->active_rate_basic, &left);
1882         active_rates &= ~ret_rates;
1883
1884         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1885                                  priv->active_rate_basic, &left);
1886         active_rates &= ~ret_rates;
1887
1888         len += 2 + *pos;
1889         pos += (*pos) + 1;
1890         if (active_rates == 0)
1891                 goto fill_end;
1892
1893         /* fill in supported extended rate */
1894         /* ...next IE... */
1895         left -= 2;
1896         if (left < 0)
1897                 return 0;
1898         /* ... fill it in... */
1899         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1900         *pos = 0;
1901         iwl3945_supported_rate_to_ie(pos, active_rates,
1902                                  priv->active_rate_basic, &left);
1903         if (*pos > 0)
1904                 len += 2 + *pos;
1905
1906  fill_end:
1907         return (u16)len;
1908 }
1909
1910 /*
1911  * QoS  support
1912 */
1913 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1914                                        struct iwl3945_qosparam_cmd *qos)
1915 {
1916
1917         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1918                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1919 }
1920
1921 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1922 {
1923         u16 cw_min = 15;
1924         u16 cw_max = 1023;
1925         u8 aifs = 2;
1926         u8 is_legacy = 0;
1927         unsigned long flags;
1928         int i;
1929
1930         spin_lock_irqsave(&priv->lock, flags);
1931         priv->qos_data.qos_active = 0;
1932
1933         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1934                 if (priv->qos_data.qos_enable)
1935                         priv->qos_data.qos_active = 1;
1936                 if (!(priv->active_rate & 0xfff0)) {
1937                         cw_min = 31;
1938                         is_legacy = 1;
1939                 }
1940         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1941                 if (priv->qos_data.qos_enable)
1942                         priv->qos_data.qos_active = 1;
1943         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1944                 cw_min = 31;
1945                 is_legacy = 1;
1946         }
1947
1948         if (priv->qos_data.qos_active)
1949                 aifs = 3;
1950
1951         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1952         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1953         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1954         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1955         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1956
1957         if (priv->qos_data.qos_active) {
1958                 i = 1;
1959                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1960                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1961                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1962                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1963                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1964
1965                 i = 2;
1966                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1967                         cpu_to_le16((cw_min + 1) / 2 - 1);
1968                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1969                         cpu_to_le16(cw_max);
1970                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1971                 if (is_legacy)
1972                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1973                                 cpu_to_le16(6016);
1974                 else
1975                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1976                                 cpu_to_le16(3008);
1977                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1978
1979                 i = 3;
1980                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1981                         cpu_to_le16((cw_min + 1) / 4 - 1);
1982                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1983                         cpu_to_le16((cw_max + 1) / 2 - 1);
1984                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1985                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1986                 if (is_legacy)
1987                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1988                                 cpu_to_le16(3264);
1989                 else
1990                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1991                                 cpu_to_le16(1504);
1992         } else {
1993                 for (i = 1; i < 4; i++) {
1994                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1995                                 cpu_to_le16(cw_min);
1996                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1997                                 cpu_to_le16(cw_max);
1998                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1999                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2000                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2001                 }
2002         }
2003         IWL_DEBUG_QOS("set QoS to default \n");
2004
2005         spin_unlock_irqrestore(&priv->lock, flags);
2006 }
2007
2008 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
2009 {
2010         unsigned long flags;
2011
2012         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2013                 return;
2014
2015         if (!priv->qos_data.qos_enable)
2016                 return;
2017
2018         spin_lock_irqsave(&priv->lock, flags);
2019         priv->qos_data.def_qos_parm.qos_flags = 0;
2020
2021         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2022             !priv->qos_data.qos_cap.q_AP.txop_request)
2023                 priv->qos_data.def_qos_parm.qos_flags |=
2024                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2025
2026         if (priv->qos_data.qos_active)
2027                 priv->qos_data.def_qos_parm.qos_flags |=
2028                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2029
2030         spin_unlock_irqrestore(&priv->lock, flags);
2031
2032         if (force || iwl3945_is_associated(priv)) {
2033                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2034                               priv->qos_data.qos_active);
2035
2036                 iwl3945_send_qos_params_command(priv,
2037                                 &(priv->qos_data.def_qos_parm));
2038         }
2039 }
2040
2041 /*
2042  * Power management (not Tx power!) functions
2043  */
2044 #define MSEC_TO_USEC 1024
2045
2046 #define NOSLP __constant_cpu_to_le32(0)
2047 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2048 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2049 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2050                                      __constant_cpu_to_le32(X1), \
2051                                      __constant_cpu_to_le32(X2), \
2052                                      __constant_cpu_to_le32(X3), \
2053                                      __constant_cpu_to_le32(X4)}
2054
2055
2056 /* default power management (not Tx power) table values */
2057 /* for tim  0-10 */
2058 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
2059         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2060         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2061         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2062         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2063         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2064         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2065 };
2066
2067 /* for tim > 10 */
2068 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
2069         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2070         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2071                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2072         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2073                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2074         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2075                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2076         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2077         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2078                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2079 };
2080
2081 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
2082 {
2083         int rc = 0, i;
2084         struct iwl3945_power_mgr *pow_data;
2085         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
2086         u16 pci_pm;
2087
2088         IWL_DEBUG_POWER("Initialize power \n");
2089
2090         pow_data = &(priv->power_data);
2091
2092         memset(pow_data, 0, sizeof(*pow_data));
2093
2094         pow_data->active_index = IWL_POWER_RANGE_0;
2095         pow_data->dtim_val = 0xffff;
2096
2097         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2098         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2099
2100         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2101         if (rc != 0)
2102                 return 0;
2103         else {
2104                 struct iwl3945_powertable_cmd *cmd;
2105
2106                 IWL_DEBUG_POWER("adjust power command flags\n");
2107
2108                 for (i = 0; i < IWL_POWER_AC; i++) {
2109                         cmd = &pow_data->pwr_range_0[i].cmd;
2110
2111                         if (pci_pm & 0x1)
2112                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2113                         else
2114                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2115                 }
2116         }
2117         return rc;
2118 }
2119
2120 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
2121                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
2122 {
2123         int rc = 0, i;
2124         u8 skip;
2125         u32 max_sleep = 0;
2126         struct iwl3945_power_vec_entry *range;
2127         u8 period = 0;
2128         struct iwl3945_power_mgr *pow_data;
2129
2130         if (mode > IWL_POWER_INDEX_5) {
2131                 IWL_DEBUG_POWER("Error invalid power mode \n");
2132                 return -1;
2133         }
2134         pow_data = &(priv->power_data);
2135
2136         if (pow_data->active_index == IWL_POWER_RANGE_0)
2137                 range = &pow_data->pwr_range_0[0];
2138         else
2139                 range = &pow_data->pwr_range_1[1];
2140
2141         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
2142
2143 #ifdef IWL_MAC80211_DISABLE
2144         if (priv->assoc_network != NULL) {
2145                 unsigned long flags;
2146
2147                 period = priv->assoc_network->tim.tim_period;
2148         }
2149 #endif  /*IWL_MAC80211_DISABLE */
2150         skip = range[mode].no_dtim;
2151
2152         if (period == 0) {
2153                 period = 1;
2154                 skip = 0;
2155         }
2156
2157         if (skip == 0) {
2158                 max_sleep = period;
2159                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2160         } else {
2161                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2162                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2163                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2164         }
2165
2166         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2167                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2168                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2169         }
2170
2171         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2172         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2173         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2174         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2175                         le32_to_cpu(cmd->sleep_interval[0]),
2176                         le32_to_cpu(cmd->sleep_interval[1]),
2177                         le32_to_cpu(cmd->sleep_interval[2]),
2178                         le32_to_cpu(cmd->sleep_interval[3]),
2179                         le32_to_cpu(cmd->sleep_interval[4]));
2180
2181         return rc;
2182 }
2183
2184 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2185 {
2186         u32 uninitialized_var(final_mode);
2187         int rc;
2188         struct iwl3945_powertable_cmd cmd;
2189
2190         /* If on battery, set to 3,
2191          * if plugged into AC power, set to CAM ("continuously aware mode"),
2192          * else user level */
2193         switch (mode) {
2194         case IWL_POWER_BATTERY:
2195                 final_mode = IWL_POWER_INDEX_3;
2196                 break;
2197         case IWL_POWER_AC:
2198                 final_mode = IWL_POWER_MODE_CAM;
2199                 break;
2200         default:
2201                 final_mode = mode;
2202                 break;
2203         }
2204
2205         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2206
2207         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2208
2209         if (final_mode == IWL_POWER_MODE_CAM)
2210                 clear_bit(STATUS_POWER_PMI, &priv->status);
2211         else
2212                 set_bit(STATUS_POWER_PMI, &priv->status);
2213
2214         return rc;
2215 }
2216
2217 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2218 {
2219         /* Filter incoming packets to determine if they are targeted toward
2220          * this network, discarding packets coming from ourselves */
2221         switch (priv->iw_mode) {
2222         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2223                 /* packets from our adapter are dropped (echo) */
2224                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2225                         return 0;
2226                 /* {broad,multi}cast packets to our IBSS go through */
2227                 if (is_multicast_ether_addr(header->addr1))
2228                         return !compare_ether_addr(header->addr3, priv->bssid);
2229                 /* packets to our adapter go through */
2230                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2231         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2232                 /* packets from our adapter are dropped (echo) */
2233                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2234                         return 0;
2235                 /* {broad,multi}cast packets to our BSS go through */
2236                 if (is_multicast_ether_addr(header->addr1))
2237                         return !compare_ether_addr(header->addr2, priv->bssid);
2238                 /* packets to our adapter go through */
2239                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2240         }
2241
2242         return 1;
2243 }
2244
2245 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2246
2247 static const char *iwl3945_get_tx_fail_reason(u32 status)
2248 {
2249         switch (status & TX_STATUS_MSK) {
2250         case TX_STATUS_SUCCESS:
2251                 return "SUCCESS";
2252                 TX_STATUS_ENTRY(SHORT_LIMIT);
2253                 TX_STATUS_ENTRY(LONG_LIMIT);
2254                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2255                 TX_STATUS_ENTRY(MGMNT_ABORT);
2256                 TX_STATUS_ENTRY(NEXT_FRAG);
2257                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2258                 TX_STATUS_ENTRY(DEST_PS);
2259                 TX_STATUS_ENTRY(ABORTED);
2260                 TX_STATUS_ENTRY(BT_RETRY);
2261                 TX_STATUS_ENTRY(STA_INVALID);
2262                 TX_STATUS_ENTRY(FRAG_DROPPED);
2263                 TX_STATUS_ENTRY(TID_DISABLE);
2264                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2265                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2266                 TX_STATUS_ENTRY(TX_LOCKED);
2267                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2268         }
2269
2270         return "UNKNOWN";
2271 }
2272
2273 /**
2274  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2275  *
2276  * NOTE: priv->mutex is not required before calling this function
2277  */
2278 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2279 {
2280         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2281                 clear_bit(STATUS_SCANNING, &priv->status);
2282                 return 0;
2283         }
2284
2285         if (test_bit(STATUS_SCANNING, &priv->status)) {
2286                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2287                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2288                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2289                         queue_work(priv->workqueue, &priv->abort_scan);
2290
2291                 } else
2292                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2293
2294                 return test_bit(STATUS_SCANNING, &priv->status);
2295         }
2296
2297         return 0;
2298 }
2299
2300 /**
2301  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2302  * @ms: amount of time to wait (in milliseconds) for scan to abort
2303  *
2304  * NOTE: priv->mutex must be held before calling this function
2305  */
2306 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2307 {
2308         unsigned long now = jiffies;
2309         int ret;
2310
2311         ret = iwl3945_scan_cancel(priv);
2312         if (ret && ms) {
2313                 mutex_unlock(&priv->mutex);
2314                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2315                                 test_bit(STATUS_SCANNING, &priv->status))
2316                         msleep(1);
2317                 mutex_lock(&priv->mutex);
2318
2319                 return test_bit(STATUS_SCANNING, &priv->status);
2320         }
2321
2322         return ret;
2323 }
2324
2325 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2326 {
2327         /* Reset ieee stats */
2328
2329         /* We don't reset the net_device_stats (ieee->stats) on
2330          * re-association */
2331
2332         priv->last_seq_num = -1;
2333         priv->last_frag_num = -1;
2334         priv->last_packet_time = 0;
2335
2336         iwl3945_scan_cancel(priv);
2337 }
2338
2339 #define MAX_UCODE_BEACON_INTERVAL       1024
2340 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2341
2342 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2343 {
2344         u16 new_val = 0;
2345         u16 beacon_factor = 0;
2346
2347         beacon_factor =
2348             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2349                 / MAX_UCODE_BEACON_INTERVAL;
2350         new_val = beacon_val / beacon_factor;
2351
2352         return cpu_to_le16(new_val);
2353 }
2354
2355 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2356 {
2357         u64 interval_tm_unit;
2358         u64 tsf, result;
2359         unsigned long flags;
2360         struct ieee80211_conf *conf = NULL;
2361         u16 beacon_int = 0;
2362
2363         conf = ieee80211_get_hw_conf(priv->hw);
2364
2365         spin_lock_irqsave(&priv->lock, flags);
2366         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2367         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2368
2369         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2370
2371         tsf = priv->timestamp1;
2372         tsf = ((tsf << 32) | priv->timestamp0);
2373
2374         beacon_int = priv->beacon_int;
2375         spin_unlock_irqrestore(&priv->lock, flags);
2376
2377         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2378                 if (beacon_int == 0) {
2379                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2380                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2381                 } else {
2382                         priv->rxon_timing.beacon_interval =
2383                                 cpu_to_le16(beacon_int);
2384                         priv->rxon_timing.beacon_interval =
2385                             iwl3945_adjust_beacon_interval(
2386                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2387                 }
2388
2389                 priv->rxon_timing.atim_window = 0;
2390         } else {
2391                 priv->rxon_timing.beacon_interval =
2392                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2393                 /* TODO: we need to get atim_window from upper stack
2394                  * for now we set to 0 */
2395                 priv->rxon_timing.atim_window = 0;
2396         }
2397
2398         interval_tm_unit =
2399                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2400         result = do_div(tsf, interval_tm_unit);
2401         priv->rxon_timing.beacon_init_val =
2402             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2403
2404         IWL_DEBUG_ASSOC
2405             ("beacon interval %d beacon timer %d beacon tim %d\n",
2406                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2407                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2408                 le16_to_cpu(priv->rxon_timing.atim_window));
2409 }
2410
2411 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2412 {
2413         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2414                 IWL_ERROR("APs don't scan.\n");
2415                 return 0;
2416         }
2417
2418         if (!iwl3945_is_ready_rf(priv)) {
2419                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2420                 return -EIO;
2421         }
2422
2423         if (test_bit(STATUS_SCANNING, &priv->status)) {
2424                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2425                 return -EAGAIN;
2426         }
2427
2428         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2429                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2430                                "Queuing.\n");
2431                 return -EAGAIN;
2432         }
2433
2434         IWL_DEBUG_INFO("Starting scan...\n");
2435         priv->scan_bands = 2;
2436         set_bit(STATUS_SCANNING, &priv->status);
2437         priv->scan_start = jiffies;
2438         priv->scan_pass_start = priv->scan_start;
2439
2440         queue_work(priv->workqueue, &priv->request_scan);
2441
2442         return 0;
2443 }
2444
2445 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2446 {
2447         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2448
2449         if (hw_decrypt)
2450                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2451         else
2452                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2453
2454         return 0;
2455 }
2456
2457 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2458                                           enum ieee80211_band band)
2459 {
2460         if (band == IEEE80211_BAND_5GHZ) {
2461                 priv->staging_rxon.flags &=
2462                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2463                       | RXON_FLG_CCK_MSK);
2464                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2465         } else {
2466                 /* Copied from iwl3945_bg_post_associate() */
2467                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2468                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2469                 else
2470                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2471
2472                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2473                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2474
2475                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2476                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2477                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2478         }
2479 }
2480
2481 /*
2482  * initialize rxon structure with default values from eeprom
2483  */
2484 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2485 {
2486         const struct iwl3945_channel_info *ch_info;
2487
2488         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2489
2490         switch (priv->iw_mode) {
2491         case IEEE80211_IF_TYPE_AP:
2492                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2493                 break;
2494
2495         case IEEE80211_IF_TYPE_STA:
2496                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2497                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2498                 break;
2499
2500         case IEEE80211_IF_TYPE_IBSS:
2501                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2502                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2503                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2504                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2505                 break;
2506
2507         case IEEE80211_IF_TYPE_MNTR:
2508                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2509                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2510                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2511                 break;
2512         }
2513
2514 #if 0
2515         /* TODO:  Figure out when short_preamble would be set and cache from
2516          * that */
2517         if (!hw_to_local(priv->hw)->short_preamble)
2518                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2519         else
2520                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2521 #endif
2522
2523         ch_info = iwl3945_get_channel_info(priv, priv->band,
2524                                        le16_to_cpu(priv->staging_rxon.channel));
2525
2526         if (!ch_info)
2527                 ch_info = &priv->channel_info[0];
2528
2529         /*
2530          * in some case A channels are all non IBSS
2531          * in this case force B/G channel
2532          */
2533         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2534             !(is_channel_ibss(ch_info)))
2535                 ch_info = &priv->channel_info[0];
2536
2537         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2538         if (is_channel_a_band(ch_info))
2539                 priv->band = IEEE80211_BAND_5GHZ;
2540         else
2541                 priv->band = IEEE80211_BAND_2GHZ;
2542
2543         iwl3945_set_flags_for_phymode(priv, priv->band);
2544
2545         priv->staging_rxon.ofdm_basic_rates =
2546             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2547         priv->staging_rxon.cck_basic_rates =
2548             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2549 }
2550
2551 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2552 {
2553         if (mode == IEEE80211_IF_TYPE_IBSS) {
2554                 const struct iwl3945_channel_info *ch_info;
2555
2556                 ch_info = iwl3945_get_channel_info(priv,
2557                         priv->band,
2558                         le16_to_cpu(priv->staging_rxon.channel));
2559
2560                 if (!ch_info || !is_channel_ibss(ch_info)) {
2561                         IWL_ERROR("channel %d not IBSS channel\n",
2562                                   le16_to_cpu(priv->staging_rxon.channel));
2563                         return -EINVAL;
2564                 }
2565         }
2566
2567         priv->iw_mode = mode;
2568
2569         iwl3945_connection_init_rx_config(priv);
2570         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2571
2572         iwl3945_clear_stations_table(priv);
2573
2574         /* dont commit rxon if rf-kill is on*/
2575         if (!iwl3945_is_ready_rf(priv))
2576                 return -EAGAIN;
2577
2578         cancel_delayed_work(&priv->scan_check);
2579         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2580                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2581                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2582                 return -EAGAIN;
2583         }
2584
2585         iwl3945_commit_rxon(priv);
2586
2587         return 0;
2588 }
2589
2590 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2591                                       struct ieee80211_tx_control *ctl,
2592                                       struct iwl3945_cmd *cmd,
2593                                       struct sk_buff *skb_frag,
2594                                       int last_frag)
2595 {
2596         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2597
2598         switch (keyinfo->alg) {
2599         case ALG_CCMP:
2600                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2601                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2602                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2603                 break;
2604
2605         case ALG_TKIP:
2606 #if 0
2607                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2608
2609                 if (last_frag)
2610                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2611                                8);
2612                 else
2613                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2614 #endif
2615                 break;
2616
2617         case ALG_WEP:
2618                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2619                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2620
2621                 if (keyinfo->keylen == 13)
2622                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2623
2624                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2625
2626                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2627                              "with key %d\n", ctl->key_idx);
2628                 break;
2629
2630         default:
2631                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2632                 break;
2633         }
2634 }
2635
2636 /*
2637  * handle build REPLY_TX command notification.
2638  */
2639 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2640                                   struct iwl3945_cmd *cmd,
2641                                   struct ieee80211_tx_control *ctrl,
2642                                   struct ieee80211_hdr *hdr,
2643                                   int is_unicast, u8 std_id)
2644 {
2645         __le16 *qc;
2646         u16 fc = le16_to_cpu(hdr->frame_control);
2647         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2648
2649         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2650         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2651                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2652                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2653                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2654                 if (ieee80211_is_probe_response(fc) &&
2655                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2656                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2657         } else {
2658                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2659                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2660         }
2661
2662         cmd->cmd.tx.sta_id = std_id;
2663         if (ieee80211_get_morefrag(hdr))
2664                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2665
2666         qc = ieee80211_get_qos_ctrl(hdr);
2667         if (qc) {
2668                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2669                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2670         } else
2671                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2672
2673         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2674                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2675                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2676         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2677                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2678                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2679         }
2680
2681         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2682                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2683
2684         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2685         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2686                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2687                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2688                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2689                 else
2690                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2691         } else
2692                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2693
2694         cmd->cmd.tx.driver_txop = 0;
2695         cmd->cmd.tx.tx_flags = tx_flags;
2696         cmd->cmd.tx.next_frame_len = 0;
2697 }
2698
2699 /**
2700  * iwl3945_get_sta_id - Find station's index within station table
2701  */
2702 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2703 {
2704         int sta_id;
2705         u16 fc = le16_to_cpu(hdr->frame_control);
2706
2707         /* If this frame is broadcast or management, use broadcast station id */
2708         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2709             is_multicast_ether_addr(hdr->addr1))
2710                 return priv->hw_setting.bcast_sta_id;
2711
2712         switch (priv->iw_mode) {
2713
2714         /* If we are a client station in a BSS network, use the special
2715          * AP station entry (that's the only station we communicate with) */
2716         case IEEE80211_IF_TYPE_STA:
2717                 return IWL_AP_ID;
2718
2719         /* If we are an AP, then find the station, or use BCAST */
2720         case IEEE80211_IF_TYPE_AP:
2721                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2722                 if (sta_id != IWL_INVALID_STATION)
2723                         return sta_id;
2724                 return priv->hw_setting.bcast_sta_id;
2725
2726         /* If this frame is going out to an IBSS network, find the station,
2727          * or create a new station table entry */
2728         case IEEE80211_IF_TYPE_IBSS: {
2729                 DECLARE_MAC_BUF(mac);
2730
2731                 /* Create new station table entry */
2732                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2733                 if (sta_id != IWL_INVALID_STATION)
2734                         return sta_id;
2735
2736                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2737
2738                 if (sta_id != IWL_INVALID_STATION)
2739                         return sta_id;
2740
2741                 IWL_DEBUG_DROP("Station %s not in station map. "
2742                                "Defaulting to broadcast...\n",
2743                                print_mac(mac, hdr->addr1));
2744                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2745                 return priv->hw_setting.bcast_sta_id;
2746         }
2747         default:
2748                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2749                 return priv->hw_setting.bcast_sta_id;
2750         }
2751 }
2752
2753 /*
2754  * start REPLY_TX command process
2755  */
2756 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2757                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2758 {
2759         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2760         struct iwl3945_tfd_frame *tfd;
2761         u32 *control_flags;
2762         int txq_id = ctl->queue;
2763         struct iwl3945_tx_queue *txq = NULL;
2764         struct iwl3945_queue *q = NULL;
2765         dma_addr_t phys_addr;
2766         dma_addr_t txcmd_phys;
2767         struct iwl3945_cmd *out_cmd = NULL;
2768         u16 len, idx, len_org;
2769         u8 id, hdr_len, unicast;
2770         u8 sta_id;
2771         u16 seq_number = 0;
2772         u16 fc;
2773         __le16 *qc;
2774         u8 wait_write_ptr = 0;
2775         unsigned long flags;
2776         int rc;
2777
2778         spin_lock_irqsave(&priv->lock, flags);
2779         if (iwl3945_is_rfkill(priv)) {
2780                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2781                 goto drop_unlock;
2782         }
2783
2784         if (!priv->vif) {
2785                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2786                 goto drop_unlock;
2787         }
2788
2789         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2790                 IWL_ERROR("ERROR: No TX rate available.\n");
2791                 goto drop_unlock;
2792         }
2793
2794         unicast = !is_multicast_ether_addr(hdr->addr1);
2795         id = 0;
2796
2797         fc = le16_to_cpu(hdr->frame_control);
2798
2799 #ifdef CONFIG_IWL3945_DEBUG
2800         if (ieee80211_is_auth(fc))
2801                 IWL_DEBUG_TX("Sending AUTH frame\n");
2802         else if (ieee80211_is_assoc_request(fc))
2803                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2804         else if (ieee80211_is_reassoc_request(fc))
2805                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2806 #endif
2807
2808         /* drop all data frame if we are not associated */
2809         if ((!iwl3945_is_associated(priv) ||
2810              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2811             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2812                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2813                 goto drop_unlock;
2814         }
2815
2816         spin_unlock_irqrestore(&priv->lock, flags);
2817
2818         hdr_len = ieee80211_get_hdrlen(fc);
2819
2820         /* Find (or create) index into station table for destination station */
2821         sta_id = iwl3945_get_sta_id(priv, hdr);
2822         if (sta_id == IWL_INVALID_STATION) {
2823                 DECLARE_MAC_BUF(mac);
2824
2825                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2826                                print_mac(mac, hdr->addr1));
2827                 goto drop;
2828         }
2829
2830         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2831
2832         qc = ieee80211_get_qos_ctrl(hdr);
2833         if (qc) {
2834                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2835                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2836                                 IEEE80211_SCTL_SEQ;
2837                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2838                         (hdr->seq_ctrl &
2839                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2840                 seq_number += 0x10;
2841         }
2842
2843         /* Descriptor for chosen Tx queue */
2844         txq = &priv->txq[txq_id];
2845         q = &txq->q;
2846
2847         spin_lock_irqsave(&priv->lock, flags);
2848
2849         /* Set up first empty TFD within this queue's circular TFD buffer */
2850         tfd = &txq->bd[q->write_ptr];
2851         memset(tfd, 0, sizeof(*tfd));
2852         control_flags = (u32 *) tfd;
2853         idx = get_cmd_index(q, q->write_ptr, 0);
2854
2855         /* Set up driver data for this TFD */
2856         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2857         txq->txb[q->write_ptr].skb[0] = skb;
2858         memcpy(&(txq->txb[q->write_ptr].status.control),
2859                ctl, sizeof(struct ieee80211_tx_control));
2860
2861         /* Init first empty entry in queue's array of Tx/cmd buffers */
2862         out_cmd = &txq->cmd[idx];
2863         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2864         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2865
2866         /*
2867          * Set up the Tx-command (not MAC!) header.
2868          * Store the chosen Tx queue and TFD index within the sequence field;
2869          * after Tx, uCode's Tx response will return this value so driver can
2870          * locate the frame within the tx queue and do post-tx processing.
2871          */
2872         out_cmd->hdr.cmd = REPLY_TX;
2873         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2874                                 INDEX_TO_SEQ(q->write_ptr)));
2875
2876         /* Copy MAC header from skb into command buffer */
2877         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2878
2879         /*
2880          * Use the first empty entry in this queue's command buffer array
2881          * to contain the Tx command and MAC header concatenated together
2882          * (payload data will be in another buffer).
2883          * Size of this varies, due to varying MAC header length.
2884          * If end is not dword aligned, we'll have 2 extra bytes at the end
2885          * of the MAC header (device reads on dword boundaries).
2886          * We'll tell device about this padding later.
2887          */
2888         len = priv->hw_setting.tx_cmd_len +
2889                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2890
2891         len_org = len;
2892         len = (len + 3) & ~3;
2893
2894         if (len_org != len)
2895                 len_org = 1;
2896         else
2897                 len_org = 0;
2898
2899         /* Physical address of this Tx command's header (not MAC header!),
2900          * within command buffer array. */
2901         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2902                      offsetof(struct iwl3945_cmd, hdr);
2903
2904         /* Add buffer containing Tx command and MAC(!) header to TFD's
2905          * first entry */
2906         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2907
2908         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2909                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2910
2911         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2912          * if any (802.11 null frames have no payload). */
2913         len = skb->len - hdr_len;
2914         if (len) {
2915                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2916                                            len, PCI_DMA_TODEVICE);
2917                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2918         }
2919
2920         if (!len)
2921                 /* If there is no payload, then we use only one Tx buffer */
2922                 *control_flags = TFD_CTL_COUNT_SET(1);
2923         else
2924                 /* Else use 2 buffers.
2925                  * Tell 3945 about any padding after MAC header */
2926                 *control_flags = TFD_CTL_COUNT_SET(2) |
2927                         TFD_CTL_PAD_SET(U32_PAD(len));
2928
2929         /* Total # bytes to be transmitted */
2930         len = (u16)skb->len;
2931         out_cmd->cmd.tx.len = cpu_to_le16(len);
2932
2933         /* TODO need this for burst mode later on */
2934         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2935
2936         /* set is_hcca to 0; it probably will never be implemented */
2937         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2938
2939         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2940         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2941
2942         if (!ieee80211_get_morefrag(hdr)) {
2943                 txq->need_update = 1;
2944                 if (qc) {
2945                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2946                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2947                 }
2948         } else {
2949                 wait_write_ptr = 1;
2950                 txq->need_update = 0;
2951         }
2952
2953         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2954                            sizeof(out_cmd->cmd.tx));
2955
2956         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2957                            ieee80211_get_hdrlen(fc));
2958
2959         /* Tell device the write index *just past* this latest filled TFD */
2960         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
2961         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2962         spin_unlock_irqrestore(&priv->lock, flags);
2963
2964         if (rc)
2965                 return rc;
2966
2967         if ((iwl3945_queue_space(q) < q->high_mark)
2968             && priv->mac80211_registered) {
2969                 if (wait_write_ptr) {
2970                         spin_lock_irqsave(&priv->lock, flags);
2971                         txq->need_update = 1;
2972                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2973                         spin_unlock_irqrestore(&priv->lock, flags);
2974                 }
2975
2976                 ieee80211_stop_queue(priv->hw, ctl->queue);
2977         }
2978
2979         return 0;
2980
2981 drop_unlock:
2982         spin_unlock_irqrestore(&priv->lock, flags);
2983 drop:
2984         return -1;
2985 }
2986
2987 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2988 {
2989         const struct ieee80211_supported_band *sband = NULL;
2990         struct ieee80211_rate *rate;
2991         int i;
2992
2993         sband = iwl3945_get_band(priv, priv->band);
2994         if (!sband) {
2995                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2996                 return;
2997         }
2998
2999         priv->active_rate = 0;
3000         priv->active_rate_basic = 0;
3001
3002         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
3003                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
3004
3005         for (i = 0; i < sband->n_bitrates; i++) {
3006                 rate = &sband->bitrates[i];
3007                 if ((rate->hw_value < IWL_RATE_COUNT) &&
3008                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
3009                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
3010                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
3011                         priv->active_rate |= (1 << rate->hw_value);
3012                 }
3013         }
3014
3015         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3016                        priv->active_rate, priv->active_rate_basic);
3017
3018         /*
3019          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3020          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3021          * OFDM
3022          */
3023         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3024                 priv->staging_rxon.cck_basic_rates =
3025                     ((priv->active_rate_basic &
3026                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3027         else
3028                 priv->staging_rxon.cck_basic_rates =
3029                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3030
3031         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3032                 priv->staging_rxon.ofdm_basic_rates =
3033                     ((priv->active_rate_basic &
3034                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3035                       IWL_FIRST_OFDM_RATE) & 0xFF;
3036         else
3037                 priv->staging_rxon.ofdm_basic_rates =
3038                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3039 }
3040
3041 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
3042 {
3043         unsigned long flags;
3044
3045         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3046                 return;
3047
3048         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3049                           disable_radio ? "OFF" : "ON");
3050
3051         if (disable_radio) {
3052                 iwl3945_scan_cancel(priv);
3053                 /* FIXME: This is a workaround for AP */
3054                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3055                         spin_lock_irqsave(&priv->lock, flags);
3056                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3057                                     CSR_UCODE_SW_BIT_RFKILL);
3058                         spin_unlock_irqrestore(&priv->lock, flags);
3059                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3060                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3061                 }
3062                 return;
3063         }
3064
3065         spin_lock_irqsave(&priv->lock, flags);
3066         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3067
3068         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3069         spin_unlock_irqrestore(&priv->lock, flags);
3070
3071         /* wake up ucode */
3072         msleep(10);
3073
3074         spin_lock_irqsave(&priv->lock, flags);
3075         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3076         if (!iwl3945_grab_nic_access(priv))
3077                 iwl3945_release_nic_access(priv);
3078         spin_unlock_irqrestore(&priv->lock, flags);
3079
3080         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3081                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3082                                   "disabled by HW switch\n");
3083                 return;
3084         }
3085
3086         queue_work(priv->workqueue, &priv->restart);
3087         return;
3088 }
3089
3090 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
3091                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3092 {
3093         u16 fc =
3094             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3095
3096         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3097                 return;
3098
3099         if (!(fc & IEEE80211_FCTL_PROTECTED))
3100                 return;
3101
3102         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3103         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3104         case RX_RES_STATUS_SEC_TYPE_TKIP:
3105                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3106                     RX_RES_STATUS_BAD_ICV_MIC)
3107                         stats->flag |= RX_FLAG_MMIC_ERROR;
3108         case RX_RES_STATUS_SEC_TYPE_WEP:
3109         case RX_RES_STATUS_SEC_TYPE_CCMP:
3110                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3111                     RX_RES_STATUS_DECRYPT_OK) {
3112                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3113                         stats->flag |= RX_FLAG_DECRYPTED;
3114                 }
3115                 break;
3116
3117         default:
3118                 break;
3119         }
3120 }
3121
3122 #define IWL_PACKET_RETRY_TIME HZ
3123
3124 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
3125 {
3126         u16 sc = le16_to_cpu(header->seq_ctrl);
3127         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3128         u16 frag = sc & IEEE80211_SCTL_FRAG;
3129         u16 *last_seq, *last_frag;
3130         unsigned long *last_time;
3131
3132         switch (priv->iw_mode) {
3133         case IEEE80211_IF_TYPE_IBSS:{
3134                 struct list_head *p;
3135                 struct iwl3945_ibss_seq *entry = NULL;
3136                 u8 *mac = header->addr2;
3137                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3138
3139                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3140                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
3141                         if (!compare_ether_addr(entry->mac, mac))
3142                                 break;
3143                 }
3144                 if (p == &priv->ibss_mac_hash[index]) {
3145                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3146                         if (!entry) {
3147                                 IWL_ERROR("Cannot malloc new mac entry\n");
3148                                 return 0;
3149                         }
3150                         memcpy(entry->mac, mac, ETH_ALEN);
3151                         entry->seq_num = seq;
3152                         entry->frag_num = frag;
3153                         entry->packet_time = jiffies;
3154                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3155                         return 0;
3156                 }
3157                 last_seq = &entry->seq_num;
3158                 last_frag = &entry->frag_num;
3159                 last_time = &entry->packet_time;
3160                 break;
3161         }
3162         case IEEE80211_IF_TYPE_STA:
3163                 last_seq = &priv->last_seq_num;
3164                 last_frag = &priv->last_frag_num;
3165                 last_time = &priv->last_packet_time;
3166                 break;
3167         default:
3168                 return 0;
3169         }
3170         if ((*last_seq == seq) &&
3171             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3172                 if (*last_frag == frag)
3173                         goto drop;
3174                 if (*last_frag + 1 != frag)
3175                         /* out-of-order fragment */
3176                         goto drop;
3177         } else
3178                 *last_seq = seq;
3179
3180         *last_frag = frag;
3181         *last_time = jiffies;
3182         return 0;
3183
3184  drop:
3185         return 1;
3186 }
3187
3188 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3189
3190 #include "iwl-spectrum.h"
3191
3192 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3193 #define BEACON_TIME_MASK_HIGH   0xFF000000
3194 #define TIME_UNIT               1024
3195
3196 /*
3197  * extended beacon time format
3198  * time in usec will be changed into a 32-bit value in 8:24 format
3199  * the high 1 byte is the beacon counts
3200  * the lower 3 bytes is the time in usec within one beacon interval
3201  */
3202
3203 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3204 {
3205         u32 quot;
3206         u32 rem;
3207         u32 interval = beacon_interval * 1024;
3208
3209         if (!interval || !usec)
3210                 return 0;
3211
3212         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3213         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3214
3215         return (quot << 24) + rem;
3216 }
3217
3218 /* base is usually what we get from ucode with each received frame,
3219  * the same as HW timer counter counting down
3220  */
3221
3222 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3223 {
3224         u32 base_low = base & BEACON_TIME_MASK_LOW;
3225         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3226         u32 interval = beacon_interval * TIME_UNIT;
3227         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3228             (addon & BEACON_TIME_MASK_HIGH);
3229
3230         if (base_low > addon_low)
3231                 res += base_low - addon_low;
3232         else if (base_low < addon_low) {
3233                 res += interval + base_low - addon_low;
3234                 res += (1 << 24);
3235         } else
3236                 res += (1 << 24);
3237
3238         return cpu_to_le32(res);
3239 }
3240
3241 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3242                                struct ieee80211_measurement_params *params,
3243                                u8 type)
3244 {
3245         struct iwl3945_spectrum_cmd spectrum;
3246         struct iwl3945_rx_packet *res;
3247         struct iwl3945_host_cmd cmd = {
3248                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3249                 .data = (void *)&spectrum,
3250                 .meta.flags = CMD_WANT_SKB,
3251         };
3252         u32 add_time = le64_to_cpu(params->start_time);
3253         int rc;
3254         int spectrum_resp_status;
3255         int duration = le16_to_cpu(params->duration);
3256
3257         if (iwl3945_is_associated(priv))
3258                 add_time =
3259                     iwl3945_usecs_to_beacons(
3260                         le64_to_cpu(params->start_time) - priv->last_tsf,
3261                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3262
3263         memset(&spectrum, 0, sizeof(spectrum));
3264
3265         spectrum.channel_count = cpu_to_le16(1);
3266         spectrum.flags =
3267             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3268         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3269         cmd.len = sizeof(spectrum);
3270         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3271
3272         if (iwl3945_is_associated(priv))
3273                 spectrum.start_time =
3274                     iwl3945_add_beacon_time(priv->last_beacon_time,
3275                                 add_time,
3276                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3277         else
3278                 spectrum.start_time = 0;
3279
3280         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3281         spectrum.channels[0].channel = params->channel;
3282         spectrum.channels[0].type = type;
3283         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3284                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3285                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3286
3287         rc = iwl3945_send_cmd_sync(priv, &cmd);
3288         if (rc)
3289                 return rc;
3290
3291         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3292         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3293                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3294                 rc = -EIO;
3295         }
3296
3297         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3298         switch (spectrum_resp_status) {
3299         case 0:         /* Command will be handled */
3300                 if (res->u.spectrum.id != 0xff) {
3301                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3302                                                 res->u.spectrum.id);
3303                         priv->measurement_status &= ~MEASUREMENT_READY;
3304                 }
3305                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3306                 rc = 0;
3307                 break;
3308
3309         case 1:         /* Command will not be handled */
3310                 rc = -EAGAIN;
3311                 break;
3312         }
3313
3314         dev_kfree_skb_any(cmd.meta.u.skb);
3315
3316         return rc;
3317 }
3318 #endif
3319
3320 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3321                                  struct iwl3945_tx_info *tx_sta)
3322 {
3323
3324         tx_sta->status.ack_signal = 0;
3325         tx_sta->status.excessive_retries = 0;
3326         tx_sta->status.queue_length = 0;
3327         tx_sta->status.queue_number = 0;
3328
3329         if (in_interrupt())
3330                 ieee80211_tx_status_irqsafe(priv->hw,
3331                                             tx_sta->skb[0], &(tx_sta->status));
3332         else
3333                 ieee80211_tx_status(priv->hw,
3334                                     tx_sta->skb[0], &(tx_sta->status));
3335
3336         tx_sta->skb[0] = NULL;
3337 }
3338
3339 /**
3340  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3341  *
3342  * When FW advances 'R' index, all entries between old and new 'R' index
3343  * need to be reclaimed. As result, some free space forms. If there is
3344  * enough free space (> low mark), wake the stack that feeds us.
3345  */
3346 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3347 {
3348         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3349         struct iwl3945_queue *q = &txq->q;
3350         int nfreed = 0;
3351
3352         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3353                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3354                           "is out of range [0-%d] %d %d.\n", txq_id,
3355                           index, q->n_bd, q->write_ptr, q->read_ptr);
3356                 return 0;
3357         }
3358
3359         for (index = iwl3945_queue_inc_wrap(index, q->n_bd);
3360                 q->read_ptr != index;
3361                 q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3362                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3363                         iwl3945_txstatus_to_ieee(priv,
3364                                         &(txq->txb[txq->q.read_ptr]));
3365                         iwl3945_hw_txq_free_tfd(priv, txq);
3366                 } else if (nfreed > 1) {
3367                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3368                                         q->write_ptr, q->read_ptr);
3369                         queue_work(priv->workqueue, &priv->restart);
3370                 }
3371                 nfreed++;
3372         }
3373
3374         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3375                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3376                         priv->mac80211_registered)
3377                 ieee80211_wake_queue(priv->hw, txq_id);
3378
3379
3380         return nfreed;
3381 }
3382
3383 static int iwl3945_is_tx_success(u32 status)
3384 {
3385         return (status & 0xFF) == 0x1;
3386 }
3387
3388 /******************************************************************************
3389  *
3390  * Generic RX handler implementations
3391  *
3392  ******************************************************************************/
3393 /**
3394  * iwl3945_rx_reply_tx - Handle Tx response
3395  */
3396 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3397                             struct iwl3945_rx_mem_buffer *rxb)
3398 {
3399         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3400         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3401         int txq_id = SEQ_TO_QUEUE(sequence);
3402         int index = SEQ_TO_INDEX(sequence);
3403         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3404         struct ieee80211_tx_status *tx_status;
3405         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3406         u32  status = le32_to_cpu(tx_resp->status);
3407
3408         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3409                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3410                           "is out of range [0-%d] %d %d\n", txq_id,
3411                           index, txq->q.n_bd, txq->q.write_ptr,
3412                           txq->q.read_ptr);
3413                 return;
3414         }
3415
3416         tx_status = &(txq->txb[txq->q.read_ptr].status);
3417
3418         tx_status->retry_count = tx_resp->failure_frame;
3419         tx_status->queue_number = status;
3420         tx_status->queue_length = tx_resp->bt_kill_count;
3421         tx_status->queue_length |= tx_resp->failure_rts;
3422
3423         tx_status->flags =
3424             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3425
3426         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3427                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3428                         tx_resp->rate, tx_resp->failure_frame);
3429
3430         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3431         if (index != -1)
3432                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3433
3434         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3435                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3436 }
3437
3438
3439 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3440                                struct iwl3945_rx_mem_buffer *rxb)
3441 {
3442         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3443         struct iwl3945_alive_resp *palive;
3444         struct delayed_work *pwork;
3445
3446         palive = &pkt->u.alive_frame;
3447
3448         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3449                        "0x%01X 0x%01X\n",
3450                        palive->is_valid, palive->ver_type,
3451                        palive->ver_subtype);
3452
3453         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3454                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3455                 memcpy(&priv->card_alive_init,
3456                        &pkt->u.alive_frame,
3457                        sizeof(struct iwl3945_init_alive_resp));
3458                 pwork = &priv->init_alive_start;
3459         } else {
3460                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3461                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3462                        sizeof(struct iwl3945_alive_resp));
3463                 pwork = &priv->alive_start;
3464                 iwl3945_disable_events(priv);
3465         }
3466
3467         /* We delay the ALIVE response by 5ms to
3468          * give the HW RF Kill time to activate... */
3469         if (palive->is_valid == UCODE_VALID_OK)
3470                 queue_delayed_work(priv->workqueue, pwork,
3471                                    msecs_to_jiffies(5));
3472         else
3473                 IWL_WARNING("uCode did not respond OK.\n");
3474 }
3475
3476 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3477                                  struct iwl3945_rx_mem_buffer *rxb)
3478 {
3479         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3480
3481         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3482         return;
3483 }
3484
3485 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3486                                struct iwl3945_rx_mem_buffer *rxb)
3487 {
3488         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3489
3490         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3491                 "seq 0x%04X ser 0x%08X\n",
3492                 le32_to_cpu(pkt->u.err_resp.error_type),
3493                 get_cmd_string(pkt->u.err_resp.cmd_id),
3494                 pkt->u.err_resp.cmd_id,
3495                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3496                 le32_to_cpu(pkt->u.err_resp.error_info));
3497 }
3498
3499 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3500
3501 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3502 {
3503         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3504         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3505         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3506         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3507                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3508         rxon->channel = csa->channel;
3509         priv->staging_rxon.channel = csa->channel;
3510 }
3511
3512 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3513                                           struct iwl3945_rx_mem_buffer *rxb)
3514 {
3515 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3516         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3517         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3518
3519         if (!report->state) {
3520                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3521                           "Spectrum Measure Notification: Start\n");
3522                 return;
3523         }
3524
3525         memcpy(&priv->measure_report, report, sizeof(*report));
3526         priv->measurement_status |= MEASUREMENT_READY;
3527 #endif
3528 }
3529
3530 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3531                                   struct iwl3945_rx_mem_buffer *rxb)
3532 {
3533 #ifdef CONFIG_IWL3945_DEBUG
3534         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3535         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3536         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3537                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3538 #endif
3539 }
3540
3541 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3542                                              struct iwl3945_rx_mem_buffer *rxb)
3543 {
3544         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3545         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3546                         "notification for %s:\n",
3547                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3548         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3549 }
3550
3551 static void iwl3945_bg_beacon_update(struct work_struct *work)
3552 {
3553         struct iwl3945_priv *priv =
3554                 container_of(work, struct iwl3945_priv, beacon_update);
3555         struct sk_buff *beacon;
3556
3557         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3558         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3559
3560         if (!beacon) {
3561                 IWL_ERROR("update beacon failed\n");
3562                 return;
3563         }
3564
3565         mutex_lock(&priv->mutex);
3566         /* new beacon skb is allocated every time; dispose previous.*/
3567         if (priv->ibss_beacon)
3568                 dev_kfree_skb(priv->ibss_beacon);
3569
3570         priv->ibss_beacon = beacon;
3571         mutex_unlock(&priv->mutex);
3572
3573         iwl3945_send_beacon_cmd(priv);
3574 }
3575
3576 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3577                                 struct iwl3945_rx_mem_buffer *rxb)
3578 {
3579 #ifdef CONFIG_IWL3945_DEBUG
3580         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3581         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3582         u8 rate = beacon->beacon_notify_hdr.rate;
3583
3584         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3585                 "tsf %d %d rate %d\n",
3586                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3587                 beacon->beacon_notify_hdr.failure_frame,
3588                 le32_to_cpu(beacon->ibss_mgr_status),
3589                 le32_to_cpu(beacon->high_tsf),
3590                 le32_to_cpu(beacon->low_tsf), rate);
3591 #endif
3592
3593         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3594             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3595                 queue_work(priv->workqueue, &priv->beacon_update);
3596 }
3597
3598 /* Service response to REPLY_SCAN_CMD (0x80) */
3599 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3600                               struct iwl3945_rx_mem_buffer *rxb)
3601 {
3602 #ifdef CONFIG_IWL3945_DEBUG
3603         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3604         struct iwl3945_scanreq_notification *notif =
3605             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3606
3607         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3608 #endif
3609 }
3610
3611 /* Service SCAN_START_NOTIFICATION (0x82) */
3612 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3613                                     struct iwl3945_rx_mem_buffer *rxb)
3614 {
3615         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3616         struct iwl3945_scanstart_notification *notif =
3617             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3618         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3619         IWL_DEBUG_SCAN("Scan start: "
3620                        "%d [802.11%s] "
3621                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3622                        notif->channel,
3623                        notif->band ? "bg" : "a",
3624                        notif->tsf_high,
3625                        notif->tsf_low, notif->status, notif->beacon_timer);
3626 }
3627
3628 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3629 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3630                                       struct iwl3945_rx_mem_buffer *rxb)
3631 {
3632         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3633         struct iwl3945_scanresults_notification *notif =
3634             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3635
3636         IWL_DEBUG_SCAN("Scan ch.res: "
3637                        "%d [802.11%s] "
3638                        "(TSF: 0x%08X:%08X) - %d "
3639                        "elapsed=%lu usec (%dms since last)\n",
3640                        notif->channel,
3641                        notif->band ? "bg" : "a",
3642                        le32_to_cpu(notif->tsf_high),
3643                        le32_to_cpu(notif->tsf_low),
3644                        le32_to_cpu(notif->statistics[0]),
3645                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3646                        jiffies_to_msecs(elapsed_jiffies
3647                                         (priv->last_scan_jiffies, jiffies)));
3648
3649         priv->last_scan_jiffies = jiffies;
3650         priv->next_scan_jiffies = 0;
3651 }
3652
3653 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3654 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3655                                        struct iwl3945_rx_mem_buffer *rxb)
3656 {
3657         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3658         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3659
3660         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3661                        scan_notif->scanned_channels,
3662                        scan_notif->tsf_low,
3663                        scan_notif->tsf_high, scan_notif->status);
3664
3665         /* The HW is no longer scanning */
3666         clear_bit(STATUS_SCAN_HW, &priv->status);
3667
3668         /* The scan completion notification came in, so kill that timer... */
3669         cancel_delayed_work(&priv->scan_check);
3670
3671         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3672                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3673                        jiffies_to_msecs(elapsed_jiffies
3674                                         (priv->scan_pass_start, jiffies)));
3675
3676         /* Remove this scanned band from the list
3677          * of pending bands to scan */
3678         priv->scan_bands--;
3679
3680         /* If a request to abort was given, or the scan did not succeed
3681          * then we reset the scan state machine and terminate,
3682          * re-queuing another scan if one has been requested */
3683         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3684                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3685                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3686         } else {
3687                 /* If there are more bands on this scan pass reschedule */
3688                 if (priv->scan_bands > 0)
3689                         goto reschedule;
3690         }
3691
3692         priv->last_scan_jiffies = jiffies;
3693         priv->next_scan_jiffies = 0;
3694         IWL_DEBUG_INFO("Setting scan to off\n");
3695
3696         clear_bit(STATUS_SCANNING, &priv->status);
3697
3698         IWL_DEBUG_INFO("Scan took %dms\n",
3699                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3700
3701         queue_work(priv->workqueue, &priv->scan_completed);
3702
3703         return;
3704
3705 reschedule:
3706         priv->scan_pass_start = jiffies;
3707         queue_work(priv->workqueue, &priv->request_scan);
3708 }
3709
3710 /* Handle notification from uCode that card's power state is changing
3711  * due to software, hardware, or critical temperature RFKILL */
3712 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3713                                     struct iwl3945_rx_mem_buffer *rxb)
3714 {
3715         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3716         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3717         unsigned long status = priv->status;
3718
3719         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3720                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3721                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3722
3723         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3724                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3725
3726         if (flags & HW_CARD_DISABLED)
3727                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3728         else
3729                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3730
3731
3732         if (flags & SW_CARD_DISABLED)
3733                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3734         else
3735                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3736
3737         iwl3945_scan_cancel(priv);
3738
3739         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3740              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3741             (test_bit(STATUS_RF_KILL_SW, &status) !=
3742              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3743                 queue_work(priv->workqueue, &priv->rf_kill);
3744         else
3745                 wake_up_interruptible(&priv->wait_command_queue);
3746 }
3747
3748 /**
3749  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3750  *
3751  * Setup the RX handlers for each of the reply types sent from the uCode
3752  * to the host.
3753  *
3754  * This function chains into the hardware specific files for them to setup
3755  * any hardware specific handlers as well.
3756  */
3757 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3758 {
3759         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3760         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3761         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3762         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3763         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3764             iwl3945_rx_spectrum_measure_notif;
3765         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3766         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3767             iwl3945_rx_pm_debug_statistics_notif;
3768         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3769
3770         /*
3771          * The same handler is used for both the REPLY to a discrete
3772          * statistics request from the host as well as for the periodic
3773          * statistics notifications (after received beacons) from the uCode.
3774          */
3775         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3776         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3777
3778         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3779         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3780         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3781             iwl3945_rx_scan_results_notif;
3782         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3783             iwl3945_rx_scan_complete_notif;
3784         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3785         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3786
3787         /* Set up hardware specific Rx handlers */
3788         iwl3945_hw_rx_handler_setup(priv);
3789 }
3790
3791 /**
3792  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3793  * @rxb: Rx buffer to reclaim
3794  *
3795  * If an Rx buffer has an async callback associated with it the callback
3796  * will be executed.  The attached skb (if present) will only be freed
3797  * if the callback returns 1
3798  */
3799 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3800                                 struct iwl3945_rx_mem_buffer *rxb)
3801 {
3802         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3803         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3804         int txq_id = SEQ_TO_QUEUE(sequence);
3805         int index = SEQ_TO_INDEX(sequence);
3806         int huge = sequence & SEQ_HUGE_FRAME;
3807         int cmd_index;
3808         struct iwl3945_cmd *cmd;
3809
3810         /* If a Tx command is being handled and it isn't in the actual
3811          * command queue then there a command routing bug has been introduced
3812          * in the queue management code. */
3813         if (txq_id != IWL_CMD_QUEUE_NUM)
3814                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3815                           txq_id, pkt->hdr.cmd);
3816         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3817
3818         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3819         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3820
3821         /* Input error checking is done when commands are added to queue. */
3822         if (cmd->meta.flags & CMD_WANT_SKB) {
3823                 cmd->meta.source->u.skb = rxb->skb;
3824                 rxb->skb = NULL;
3825         } else if (cmd->meta.u.callback &&
3826                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3827                 rxb->skb = NULL;
3828
3829         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3830
3831         if (!(cmd->meta.flags & CMD_ASYNC)) {
3832                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3833                 wake_up_interruptible(&priv->wait_command_queue);
3834         }
3835 }
3836
3837 /************************** RX-FUNCTIONS ****************************/
3838 /*
3839  * Rx theory of operation
3840  *
3841  * The host allocates 32 DMA target addresses and passes the host address
3842  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3843  * 0 to 31
3844  *
3845  * Rx Queue Indexes
3846  * The host/firmware share two index registers for managing the Rx buffers.
3847  *
3848  * The READ index maps to the first position that the firmware may be writing
3849  * to -- the driver can read up to (but not including) this position and get
3850  * good data.
3851  * The READ index is managed by the firmware once the card is enabled.
3852  *
3853  * The WRITE index maps to the last position the driver has read from -- the
3854  * position preceding WRITE is the last slot the firmware can place a packet.
3855  *
3856  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3857  * WRITE = READ.
3858  *
3859  * During initialization, the host sets up the READ queue position to the first
3860  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3861  *
3862  * When the firmware places a packet in a buffer, it will advance the READ index
3863  * and fire the RX interrupt.  The driver can then query the READ index and
3864  * process as many packets as possible, moving the WRITE index forward as it
3865  * resets the Rx queue buffers with new memory.
3866  *
3867  * The management in the driver is as follows:
3868  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3869  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3870  *   to replenish the iwl->rxq->rx_free.
3871  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3872  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3873  *   'processed' and 'read' driver indexes as well)
3874  * + A received packet is processed and handed to the kernel network stack,
3875  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3876  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3877  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3878  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3879  *   were enough free buffers and RX_STALLED is set it is cleared.
3880  *
3881  *
3882  * Driver sequence:
3883  *
3884  * iwl3945_rx_queue_alloc()   Allocates rx_free
3885  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3886  *                            iwl3945_rx_queue_restock
3887  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3888  *                            queue, updates firmware pointers, and updates
3889  *                            the WRITE index.  If insufficient rx_free buffers
3890  *                            are available, schedules iwl3945_rx_replenish
3891  *
3892  * -- enable interrupts --
3893  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3894  *                            READ INDEX, detaching the SKB from the pool.
3895  *                            Moves the packet buffer from queue to rx_used.
3896  *                            Calls iwl3945_rx_queue_restock to refill any empty
3897  *                            slots.
3898  * ...
3899  *
3900  */
3901
3902 /**
3903  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3904  */
3905 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3906 {
3907         int s = q->read - q->write;
3908         if (s <= 0)
3909                 s += RX_QUEUE_SIZE;
3910         /* keep some buffer to not confuse full and empty queue */
3911         s -= 2;
3912         if (s < 0)
3913                 s = 0;
3914         return s;
3915 }
3916
3917 /**
3918  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3919  */
3920 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3921 {
3922         u32 reg = 0;
3923         int rc = 0;
3924         unsigned long flags;
3925
3926         spin_lock_irqsave(&q->lock, flags);
3927
3928         if (q->need_update == 0)
3929                 goto exit_unlock;
3930
3931         /* If power-saving is in use, make sure device is awake */
3932         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3933                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3934
3935                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3936                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3937                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3938                         goto exit_unlock;
3939                 }
3940
3941                 rc = iwl3945_grab_nic_access(priv);
3942                 if (rc)
3943                         goto exit_unlock;
3944
3945                 /* Device expects a multiple of 8 */
3946                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3947                                      q->write & ~0x7);
3948                 iwl3945_release_nic_access(priv);
3949
3950         /* Else device is assumed to be awake */
3951         } else
3952                 /* Device expects a multiple of 8 */
3953                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3954
3955
3956         q->need_update = 0;
3957
3958  exit_unlock:
3959         spin_unlock_irqrestore(&q->lock, flags);
3960         return rc;
3961 }
3962
3963 /**
3964  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3965  */
3966 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3967                                           dma_addr_t dma_addr)
3968 {
3969         return cpu_to_le32((u32)dma_addr);
3970 }
3971
3972 /**
3973  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3974  *
3975  * If there are slots in the RX queue that need to be restocked,
3976  * and we have free pre-allocated buffers, fill the ranks as much
3977  * as we can, pulling from rx_free.
3978  *
3979  * This moves the 'write' index forward to catch up with 'processed', and
3980  * also updates the memory address in the firmware to reference the new
3981  * target buffer.
3982  */
3983 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3984 {
3985         struct iwl3945_rx_queue *rxq = &priv->rxq;
3986         struct list_head *element;
3987         struct iwl3945_rx_mem_buffer *rxb;
3988         unsigned long flags;
3989         int write, rc;
3990
3991         spin_lock_irqsave(&rxq->lock, flags);
3992         write = rxq->write & ~0x7;
3993         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3994                 /* Get next free Rx buffer, remove from free list */
3995                 element = rxq->rx_free.next;
3996                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3997                 list_del(element);
3998
3999                 /* Point to Rx buffer via next RBD in circular buffer */
4000                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4001                 rxq->queue[rxq->write] = rxb;
4002                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4003                 rxq->free_count--;
4004         }
4005         spin_unlock_irqrestore(&rxq->lock, flags);
4006         /* If the pre-allocated buffer pool is dropping low, schedule to
4007          * refill it */
4008         if (rxq->free_count <= RX_LOW_WATERMARK)
4009                 queue_work(priv->workqueue, &priv->rx_replenish);
4010
4011
4012         /* If we've added more space for the firmware to place data, tell it.
4013          * Increment device's write pointer in multiples of 8. */
4014         if ((write != (rxq->write & ~0x7))
4015             || (abs(rxq->write - rxq->read) > 7)) {
4016                 spin_lock_irqsave(&rxq->lock, flags);
4017                 rxq->need_update = 1;
4018                 spin_unlock_irqrestore(&rxq->lock, flags);
4019                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
4020                 if (rc)
4021                         return rc;
4022         }
4023
4024         return 0;
4025 }
4026
4027 /**
4028  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
4029  *
4030  * When moving to rx_free an SKB is allocated for the slot.
4031  *
4032  * Also restock the Rx queue via iwl3945_rx_queue_restock.
4033  * This is called as a scheduled work item (except for during initialization)
4034  */
4035 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
4036 {
4037         struct iwl3945_rx_queue *rxq = &priv->rxq;
4038         struct list_head *element;
4039         struct iwl3945_rx_mem_buffer *rxb;
4040         unsigned long flags;
4041         spin_lock_irqsave(&rxq->lock, flags);
4042         while (!list_empty(&rxq->rx_used)) {
4043                 element = rxq->rx_used.next;
4044                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4045
4046                 /* Alloc a new receive buffer */
4047                 rxb->skb =
4048                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4049                 if (!rxb->skb) {
4050                         if (net_ratelimit())
4051                                 printk(KERN_CRIT DRV_NAME
4052                                        ": Can not allocate SKB buffers\n");
4053                         /* We don't reschedule replenish work here -- we will
4054                          * call the restock method and if it still needs
4055                          * more buffers it will schedule replenish */
4056                         break;
4057                 }
4058
4059                 /* If radiotap head is required, reserve some headroom here.
4060                  * The physical head count is a variable rx_stats->phy_count.
4061                  * We reserve 4 bytes here. Plus these extra bytes, the
4062                  * headroom of the physical head should be enough for the
4063                  * radiotap head that iwl3945 supported. See iwl3945_rt.
4064                  */
4065                 skb_reserve(rxb->skb, 4);
4066
4067                 priv->alloc_rxb_skb++;
4068                 list_del(element);
4069
4070                 /* Get physical address of RB/SKB */
4071                 rxb->dma_addr =
4072                     pci_map_single(priv->pci_dev, rxb->skb->data,
4073                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4074                 list_add_tail(&rxb->list, &rxq->rx_free);
4075                 rxq->free_count++;
4076         }
4077         spin_unlock_irqrestore(&rxq->lock, flags);
4078 }
4079
4080 /*
4081  * this should be called while priv->lock is locked
4082  */
4083 static void __iwl3945_rx_replenish(void *data)
4084 {
4085         struct iwl3945_priv *priv = data;
4086
4087         iwl3945_rx_allocate(priv);
4088         iwl3945_rx_queue_restock(priv);
4089 }
4090
4091
4092 void iwl3945_rx_replenish(void *data)
4093 {
4094         struct iwl3945_priv *priv = data;
4095         unsigned long flags;
4096
4097         iwl3945_rx_allocate(priv);
4098
4099         spin_lock_irqsave(&priv->lock, flags);
4100         iwl3945_rx_queue_restock(priv);
4101         spin_unlock_irqrestore(&priv->lock, flags);
4102 }
4103
4104 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4105  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4106  * This free routine walks the list of POOL entries and if SKB is set to
4107  * non NULL it is unmapped and freed
4108  */
4109 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4110 {
4111         int i;
4112         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4113                 if (rxq->pool[i].skb != NULL) {
4114                         pci_unmap_single(priv->pci_dev,
4115                                          rxq->pool[i].dma_addr,
4116                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4117                         dev_kfree_skb(rxq->pool[i].skb);
4118                 }
4119         }
4120
4121         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4122                             rxq->dma_addr);
4123         rxq->bd = NULL;
4124 }
4125
4126 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
4127 {
4128         struct iwl3945_rx_queue *rxq = &priv->rxq;
4129         struct pci_dev *dev = priv->pci_dev;
4130         int i;
4131
4132         spin_lock_init(&rxq->lock);
4133         INIT_LIST_HEAD(&rxq->rx_free);
4134         INIT_LIST_HEAD(&rxq->rx_used);
4135
4136         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4137         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4138         if (!rxq->bd)
4139                 return -ENOMEM;
4140
4141         /* Fill the rx_used queue with _all_ of the Rx buffers */
4142         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4143                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4144
4145         /* Set us so that we have processed and used all buffers, but have
4146          * not restocked the Rx queue with fresh buffers */
4147         rxq->read = rxq->write = 0;
4148         rxq->free_count = 0;
4149         rxq->need_update = 0;
4150         return 0;
4151 }
4152
4153 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4154 {
4155         unsigned long flags;
4156         int i;
4157         spin_lock_irqsave(&rxq->lock, flags);
4158         INIT_LIST_HEAD(&rxq->rx_free);
4159         INIT_LIST_HEAD(&rxq->rx_used);
4160         /* Fill the rx_used queue with _all_ of the Rx buffers */
4161         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4162                 /* In the reset function, these buffers may have been allocated
4163                  * to an SKB, so we need to unmap and free potential storage */
4164                 if (rxq->pool[i].skb != NULL) {
4165                         pci_unmap_single(priv->pci_dev,
4166                                          rxq->pool[i].dma_addr,
4167                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4168                         priv->alloc_rxb_skb--;
4169                         dev_kfree_skb(rxq->pool[i].skb);
4170                         rxq->pool[i].skb = NULL;
4171                 }
4172                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4173         }
4174
4175         /* Set us so that we have processed and used all buffers, but have
4176          * not restocked the Rx queue with fresh buffers */
4177         rxq->read = rxq->write = 0;
4178         rxq->free_count = 0;
4179         spin_unlock_irqrestore(&rxq->lock, flags);
4180 }
4181
4182 /* Convert linear signal-to-noise ratio into dB */
4183 static u8 ratio2dB[100] = {
4184 /*       0   1   2   3   4   5   6   7   8   9 */
4185          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4186         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4187         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4188         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4189         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4190         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4191         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4192         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4193         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4194         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4195 };
4196
4197 /* Calculates a relative dB value from a ratio of linear
4198  *   (i.e. not dB) signal levels.
4199  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4200 int iwl3945_calc_db_from_ratio(int sig_ratio)
4201 {
4202         /* 1000:1 or higher just report as 60 dB */
4203         if (sig_ratio >= 1000)
4204                 return 60;
4205
4206         /* 100:1 or higher, divide by 10 and use table,
4207          *   add 20 dB to make up for divide by 10 */
4208         if (sig_ratio >= 100)
4209                 return (20 + (int)ratio2dB[sig_ratio/10]);
4210
4211         /* We shouldn't see this */
4212         if (sig_ratio < 1)
4213                 return 0;
4214
4215         /* Use table for ratios 1:1 - 99:1 */
4216         return (int)ratio2dB[sig_ratio];
4217 }
4218
4219 #define PERFECT_RSSI (-20) /* dBm */
4220 #define WORST_RSSI (-95)   /* dBm */
4221 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4222
4223 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4224  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4225  *   about formulas used below. */
4226 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4227 {
4228         int sig_qual;
4229         int degradation = PERFECT_RSSI - rssi_dbm;
4230
4231         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4232          * as indicator; formula is (signal dbm - noise dbm).
4233          * SNR at or above 40 is a great signal (100%).
4234          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4235          * Weakest usable signal is usually 10 - 15 dB SNR. */
4236         if (noise_dbm) {
4237                 if (rssi_dbm - noise_dbm >= 40)
4238                         return 100;
4239                 else if (rssi_dbm < noise_dbm)
4240                         return 0;
4241                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4242
4243         /* Else use just the signal level.
4244          * This formula is a least squares fit of data points collected and
4245          *   compared with a reference system that had a percentage (%) display
4246          *   for signal quality. */
4247         } else
4248                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4249                             (15 * RSSI_RANGE + 62 * degradation)) /
4250                            (RSSI_RANGE * RSSI_RANGE);
4251
4252         if (sig_qual > 100)
4253                 sig_qual = 100;
4254         else if (sig_qual < 1)
4255                 sig_qual = 0;
4256
4257         return sig_qual;
4258 }
4259
4260 /**
4261  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4262  *
4263  * Uses the priv->rx_handlers callback function array to invoke
4264  * the appropriate handlers, including command responses,
4265  * frame-received notifications, and other notifications.
4266  */
4267 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4268 {
4269         struct iwl3945_rx_mem_buffer *rxb;
4270         struct iwl3945_rx_packet *pkt;
4271         struct iwl3945_rx_queue *rxq = &priv->rxq;
4272         u32 r, i;
4273         int reclaim;
4274         unsigned long flags;
4275         u8 fill_rx = 0;
4276         u32 count = 8;
4277
4278         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4279          * buffer that the driver may process (last buffer filled by ucode). */
4280         r = iwl3945_hw_get_rx_read(priv);
4281         i = rxq->read;
4282
4283         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4284                 fill_rx = 1;
4285         /* Rx interrupt, but nothing sent from uCode */
4286         if (i == r)
4287                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4288
4289         while (i != r) {
4290                 rxb = rxq->queue[i];
4291
4292                 /* If an RXB doesn't have a Rx queue slot associated with it,
4293                  * then a bug has been introduced in the queue refilling
4294                  * routines -- catch it here */
4295                 BUG_ON(rxb == NULL);
4296
4297                 rxq->queue[i] = NULL;
4298
4299                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4300                                             IWL_RX_BUF_SIZE,
4301                                             PCI_DMA_FROMDEVICE);
4302                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4303
4304                 /* Reclaim a command buffer only if this packet is a response
4305                  *   to a (driver-originated) command.
4306                  * If the packet (e.g. Rx frame) originated from uCode,
4307                  *   there is no command buffer to reclaim.
4308                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4309                  *   but apparently a few don't get set; catch them here. */
4310                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4311                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4312                         (pkt->hdr.cmd != REPLY_TX);
4313
4314                 /* Based on type of command response or notification,
4315                  *   handle those that need handling via function in
4316                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4317                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4318                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4319                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4320                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4321                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4322                 } else {
4323                         /* No handling needed */
4324                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4325                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4326                                 r, i, get_cmd_string(pkt->hdr.cmd),
4327                                 pkt->hdr.cmd);
4328                 }
4329
4330                 if (reclaim) {
4331                         /* Invoke any callbacks, transfer the skb to caller, and
4332                          * fire off the (possibly) blocking iwl3945_send_cmd()
4333                          * as we reclaim the driver command queue */
4334                         if (rxb && rxb->skb)
4335                                 iwl3945_tx_cmd_complete(priv, rxb);
4336                         else
4337                                 IWL_WARNING("Claim null rxb?\n");
4338                 }
4339
4340                 /* For now we just don't re-use anything.  We can tweak this
4341                  * later to try and re-use notification packets and SKBs that
4342                  * fail to Rx correctly */
4343                 if (rxb->skb != NULL) {
4344                         priv->alloc_rxb_skb--;
4345                         dev_kfree_skb_any(rxb->skb);
4346                         rxb->skb = NULL;
4347                 }
4348
4349                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4350                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4351                 spin_lock_irqsave(&rxq->lock, flags);
4352                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4353                 spin_unlock_irqrestore(&rxq->lock, flags);
4354                 i = (i + 1) & RX_QUEUE_MASK;
4355                 /* If there are a lot of unused frames,
4356                  * restock the Rx queue so ucode won't assert. */
4357                 if (fill_rx) {
4358                         count++;
4359                         if (count >= 8) {
4360                                 priv->rxq.read = i;
4361                                 __iwl3945_rx_replenish(priv);
4362                                 count = 0;
4363                         }
4364                 }
4365         }
4366
4367         /* Backtrack one entry */
4368         priv->rxq.read = i;
4369         iwl3945_rx_queue_restock(priv);
4370 }
4371
4372 /**
4373  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4374  */
4375 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4376                                   struct iwl3945_tx_queue *txq)
4377 {
4378         u32 reg = 0;
4379         int rc = 0;
4380         int txq_id = txq->q.id;
4381
4382         if (txq->need_update == 0)
4383                 return rc;
4384
4385         /* if we're trying to save power */
4386         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4387                 /* wake up nic if it's powered down ...
4388                  * uCode will wake up, and interrupt us again, so next
4389                  * time we'll skip this part. */
4390                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4391
4392                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4393                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4394                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4395                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4396                         return rc;
4397                 }
4398
4399                 /* restore this queue's parameters in nic hardware. */
4400                 rc = iwl3945_grab_nic_access(priv);
4401                 if (rc)
4402                         return rc;
4403                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4404                                      txq->q.write_ptr | (txq_id << 8));
4405                 iwl3945_release_nic_access(priv);
4406
4407         /* else not in power-save mode, uCode will never sleep when we're
4408          * trying to tx (during RFKILL, we're not trying to tx). */
4409         } else
4410                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4411                             txq->q.write_ptr | (txq_id << 8));
4412
4413         txq->need_update = 0;
4414
4415         return rc;
4416 }
4417
4418 #ifdef CONFIG_IWL3945_DEBUG
4419 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4420 {
4421         DECLARE_MAC_BUF(mac);
4422
4423         IWL_DEBUG_RADIO("RX CONFIG:\n");
4424         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4425         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4426         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4427         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4428                         le32_to_cpu(rxon->filter_flags));
4429         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4430         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4431                         rxon->ofdm_basic_rates);
4432         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4433         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4434                         print_mac(mac, rxon->node_addr));
4435         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4436                         print_mac(mac, rxon->bssid_addr));
4437         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4438 }
4439 #endif
4440
4441 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4442 {
4443         IWL_DEBUG_ISR("Enabling interrupts\n");
4444         set_bit(STATUS_INT_ENABLED, &priv->status);
4445         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4446 }
4447
4448 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4449 {
4450         clear_bit(STATUS_INT_ENABLED, &priv->status);
4451
4452         /* disable interrupts from uCode/NIC to host */
4453         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4454
4455         /* acknowledge/clear/reset any interrupts still pending
4456          * from uCode or flow handler (Rx/Tx DMA) */
4457         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4458         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4459         IWL_DEBUG_ISR("Disabled interrupts\n");
4460 }
4461
4462 static const char *desc_lookup(int i)
4463 {
4464         switch (i) {
4465         case 1:
4466                 return "FAIL";
4467         case 2:
4468                 return "BAD_PARAM";
4469         case 3:
4470                 return "BAD_CHECKSUM";
4471         case 4:
4472                 return "NMI_INTERRUPT";
4473         case 5:
4474                 return "SYSASSERT";
4475         case 6:
4476                 return "FATAL_ERROR";
4477         }
4478
4479         return "UNKNOWN";
4480 }
4481
4482 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4483 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4484
4485 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4486 {
4487         u32 i;
4488         u32 desc, time, count, base, data1;
4489         u32 blink1, blink2, ilink1, ilink2;
4490         int rc;
4491
4492         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4493
4494         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4495                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4496                 return;
4497         }
4498
4499         rc = iwl3945_grab_nic_access(priv);
4500         if (rc) {
4501                 IWL_WARNING("Can not read from adapter at this time.\n");
4502                 return;
4503         }
4504
4505         count = iwl3945_read_targ_mem(priv, base);
4506
4507         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4508                 IWL_ERROR("Start IWL Error Log Dump:\n");
4509                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4510         }
4511
4512         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4513                   "ilink1  nmiPC   Line\n");
4514         for (i = ERROR_START_OFFSET;
4515              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4516              i += ERROR_ELEM_SIZE) {
4517                 desc = iwl3945_read_targ_mem(priv, base + i);
4518                 time =
4519                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4520                 blink1 =
4521                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4522                 blink2 =
4523                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4524                 ilink1 =
4525                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4526                 ilink2 =
4527                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4528                 data1 =
4529                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4530
4531                 IWL_ERROR
4532                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4533                      desc_lookup(desc), desc, time, blink1, blink2,
4534                      ilink1, ilink2, data1);
4535         }
4536
4537         iwl3945_release_nic_access(priv);
4538
4539 }
4540
4541 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4542
4543 /**
4544  * iwl3945_print_event_log - Dump error event log to syslog
4545  *
4546  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4547  */
4548 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4549                                 u32 num_events, u32 mode)
4550 {
4551         u32 i;
4552         u32 base;       /* SRAM byte address of event log header */
4553         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4554         u32 ptr;        /* SRAM byte address of log data */
4555         u32 ev, time, data; /* event log data */
4556
4557         if (num_events == 0)
4558                 return;
4559
4560         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4561
4562         if (mode == 0)
4563                 event_size = 2 * sizeof(u32);
4564         else
4565                 event_size = 3 * sizeof(u32);
4566
4567         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4568
4569         /* "time" is actually "data" for mode 0 (no timestamp).
4570          * place event id # at far right for easier visual parsing. */
4571         for (i = 0; i < num_events; i++) {
4572                 ev = iwl3945_read_targ_mem(priv, ptr);
4573                 ptr += sizeof(u32);
4574                 time = iwl3945_read_targ_mem(priv, ptr);
4575                 ptr += sizeof(u32);
4576                 if (mode == 0)
4577                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4578                 else {
4579                         data = iwl3945_read_targ_mem(priv, ptr);
4580                         ptr += sizeof(u32);
4581                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4582                 }
4583         }
4584 }
4585
4586 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4587 {
4588         int rc;
4589         u32 base;       /* SRAM byte address of event log header */
4590         u32 capacity;   /* event log capacity in # entries */
4591         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4592         u32 num_wraps;  /* # times uCode wrapped to top of log */
4593         u32 next_entry; /* index of next entry to be written by uCode */
4594         u32 size;       /* # entries that we'll print */
4595
4596         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4597         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4598                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4599                 return;
4600         }
4601
4602         rc = iwl3945_grab_nic_access(priv);
4603         if (rc) {
4604                 IWL_WARNING("Can not read from adapter at this time.\n");
4605                 return;
4606         }
4607
4608         /* event log header */
4609         capacity = iwl3945_read_targ_mem(priv, base);
4610         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4611         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4612         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4613
4614         size = num_wraps ? capacity : next_entry;
4615
4616         /* bail out if nothing in log */
4617         if (size == 0) {
4618                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4619                 iwl3945_release_nic_access(priv);
4620                 return;
4621         }
4622
4623         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4624                   size, num_wraps);
4625
4626         /* if uCode has wrapped back to top of log, start at the oldest entry,
4627          * i.e the next one that uCode would fill. */
4628         if (num_wraps)
4629                 iwl3945_print_event_log(priv, next_entry,
4630                                     capacity - next_entry, mode);
4631
4632         /* (then/else) start at top of log */
4633         iwl3945_print_event_log(priv, 0, next_entry, mode);
4634
4635         iwl3945_release_nic_access(priv);
4636 }
4637
4638 /**
4639  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4640  */
4641 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4642 {
4643         /* Set the FW error flag -- cleared on iwl3945_down */
4644         set_bit(STATUS_FW_ERROR, &priv->status);
4645
4646         /* Cancel currently queued command. */
4647         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4648
4649 #ifdef CONFIG_IWL3945_DEBUG
4650         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4651                 iwl3945_dump_nic_error_log(priv);
4652                 iwl3945_dump_nic_event_log(priv);
4653                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4654         }
4655 #endif
4656
4657         wake_up_interruptible(&priv->wait_command_queue);
4658
4659         /* Keep the restart process from trying to send host
4660          * commands by clearing the INIT status bit */
4661         clear_bit(STATUS_READY, &priv->status);
4662
4663         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4664                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4665                           "Restarting adapter due to uCode error.\n");
4666
4667                 if (iwl3945_is_associated(priv)) {
4668                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4669                                sizeof(priv->recovery_rxon));
4670                         priv->error_recovering = 1;
4671                 }
4672                 queue_work(priv->workqueue, &priv->restart);
4673         }
4674 }
4675
4676 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4677 {
4678         unsigned long flags;
4679
4680         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4681                sizeof(priv->staging_rxon));
4682         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4683         iwl3945_commit_rxon(priv);
4684
4685         iwl3945_add_station(priv, priv->bssid, 1, 0);
4686
4687         spin_lock_irqsave(&priv->lock, flags);
4688         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4689         priv->error_recovering = 0;
4690         spin_unlock_irqrestore(&priv->lock, flags);
4691 }
4692
4693 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4694 {
4695         u32 inta, handled = 0;
4696         u32 inta_fh;
4697         unsigned long flags;
4698 #ifdef CONFIG_IWL3945_DEBUG
4699         u32 inta_mask;
4700 #endif
4701
4702         spin_lock_irqsave(&priv->lock, flags);
4703
4704         /* Ack/clear/reset pending uCode interrupts.
4705          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4706          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4707         inta = iwl3945_read32(priv, CSR_INT);
4708         iwl3945_write32(priv, CSR_INT, inta);
4709
4710         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4711          * Any new interrupts that happen after this, either while we're
4712          * in this tasklet, or later, will show up in next ISR/tasklet. */
4713         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4714         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4715
4716 #ifdef CONFIG_IWL3945_DEBUG
4717         if (iwl3945_debug_level & IWL_DL_ISR) {
4718                 /* just for debug */
4719                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4720                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4721                               inta, inta_mask, inta_fh);
4722         }
4723 #endif
4724
4725         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4726          * atomic, make sure that inta covers all the interrupts that
4727          * we've discovered, even if FH interrupt came in just after
4728          * reading CSR_INT. */
4729         if (inta_fh & CSR_FH_INT_RX_MASK)
4730                 inta |= CSR_INT_BIT_FH_RX;
4731         if (inta_fh & CSR_FH_INT_TX_MASK)
4732                 inta |= CSR_INT_BIT_FH_TX;
4733
4734         /* Now service all interrupt bits discovered above. */
4735         if (inta & CSR_INT_BIT_HW_ERR) {
4736                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4737
4738                 /* Tell the device to stop sending interrupts */
4739                 iwl3945_disable_interrupts(priv);
4740
4741                 iwl3945_irq_handle_error(priv);
4742
4743                 handled |= CSR_INT_BIT_HW_ERR;
4744
4745                 spin_unlock_irqrestore(&priv->lock, flags);
4746
4747                 return;
4748         }
4749
4750 #ifdef CONFIG_IWL3945_DEBUG
4751         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4752                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4753                 if (inta & CSR_INT_BIT_SCD)
4754                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4755                                       "the frame/frames.\n");
4756
4757                 /* Alive notification via Rx interrupt will do the real work */
4758                 if (inta & CSR_INT_BIT_ALIVE)
4759                         IWL_DEBUG_ISR("Alive interrupt\n");
4760         }
4761 #endif
4762         /* Safely ignore these bits for debug checks below */
4763         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4764
4765         /* HW RF KILL switch toggled (4965 only) */
4766         if (inta & CSR_INT_BIT_RF_KILL) {
4767                 int hw_rf_kill = 0;
4768                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4769                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4770                         hw_rf_kill = 1;
4771
4772                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4773                                 "RF_KILL bit toggled to %s.\n",
4774                                 hw_rf_kill ? "disable radio":"enable radio");
4775
4776                 /* Queue restart only if RF_KILL switch was set to "kill"
4777                  *   when we loaded driver, and is now set to "enable".
4778                  * After we're Alive, RF_KILL gets handled by
4779                  *   iwl3945_rx_card_state_notif() */
4780                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4781                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4782                         queue_work(priv->workqueue, &priv->restart);
4783                 }
4784
4785                 handled |= CSR_INT_BIT_RF_KILL;
4786         }
4787
4788         /* Chip got too hot and stopped itself (4965 only) */
4789         if (inta & CSR_INT_BIT_CT_KILL) {
4790                 IWL_ERROR("Microcode CT kill error detected.\n");
4791                 handled |= CSR_INT_BIT_CT_KILL;
4792         }
4793
4794         /* Error detected by uCode */
4795         if (inta & CSR_INT_BIT_SW_ERR) {
4796                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4797                           inta);
4798                 iwl3945_irq_handle_error(priv);
4799                 handled |= CSR_INT_BIT_SW_ERR;
4800         }
4801
4802         /* uCode wakes up after power-down sleep */
4803         if (inta & CSR_INT_BIT_WAKEUP) {
4804                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4805                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4806                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4807                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4808                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4809                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4810                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4811                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4812
4813                 handled |= CSR_INT_BIT_WAKEUP;
4814         }
4815
4816         /* All uCode command responses, including Tx command responses,
4817          * Rx "responses" (frame-received notification), and other
4818          * notifications from uCode come through here*/
4819         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4820                 iwl3945_rx_handle(priv);
4821                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4822         }
4823
4824         if (inta & CSR_INT_BIT_FH_TX) {
4825                 IWL_DEBUG_ISR("Tx interrupt\n");
4826
4827                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4828                 if (!iwl3945_grab_nic_access(priv)) {
4829                         iwl3945_write_direct32(priv,
4830                                              FH_TCSR_CREDIT
4831                                              (ALM_FH_SRVC_CHNL), 0x0);
4832                         iwl3945_release_nic_access(priv);
4833                 }
4834                 handled |= CSR_INT_BIT_FH_TX;
4835         }
4836
4837         if (inta & ~handled)
4838                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4839
4840         if (inta & ~CSR_INI_SET_MASK) {
4841                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4842                          inta & ~CSR_INI_SET_MASK);
4843                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4844         }
4845
4846         /* Re-enable all interrupts */
4847         iwl3945_enable_interrupts(priv);
4848
4849 #ifdef CONFIG_IWL3945_DEBUG
4850         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4851                 inta = iwl3945_read32(priv, CSR_INT);
4852                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4853                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4854                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4855                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4856         }
4857 #endif
4858         spin_unlock_irqrestore(&priv->lock, flags);
4859 }
4860
4861 static irqreturn_t iwl3945_isr(int irq, void *data)
4862 {
4863         struct iwl3945_priv *priv = data;
4864         u32 inta, inta_mask;
4865         u32 inta_fh;
4866         if (!priv)
4867                 return IRQ_NONE;
4868
4869         spin_lock(&priv->lock);
4870
4871         /* Disable (but don't clear!) interrupts here to avoid
4872          *    back-to-back ISRs and sporadic interrupts from our NIC.
4873          * If we have something to service, the tasklet will re-enable ints.
4874          * If we *don't* have something, we'll re-enable before leaving here. */
4875         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4876         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4877
4878         /* Discover which interrupts are active/pending */
4879         inta = iwl3945_read32(priv, CSR_INT);
4880         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4881
4882         /* Ignore interrupt if there's nothing in NIC to service.
4883          * This may be due to IRQ shared with another device,
4884          * or due to sporadic interrupts thrown from our NIC. */
4885         if (!inta && !inta_fh) {
4886                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4887                 goto none;
4888         }
4889
4890         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4891                 /* Hardware disappeared */
4892                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4893                 goto unplugged;
4894         }
4895
4896         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4897                       inta, inta_mask, inta_fh);
4898
4899         inta &= ~CSR_INT_BIT_SCD;
4900
4901         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4902         if (likely(inta || inta_fh))
4903                 tasklet_schedule(&priv->irq_tasklet);
4904 unplugged:
4905         spin_unlock(&priv->lock);
4906
4907         return IRQ_HANDLED;
4908
4909  none:
4910         /* re-enable interrupts here since we don't have anything to service. */
4911         iwl3945_enable_interrupts(priv);
4912         spin_unlock(&priv->lock);
4913         return IRQ_NONE;
4914 }
4915
4916 /************************** EEPROM BANDS ****************************
4917  *
4918  * The iwl3945_eeprom_band definitions below provide the mapping from the
4919  * EEPROM contents to the specific channel number supported for each
4920  * band.
4921  *
4922  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4923  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4924  * The specific geography and calibration information for that channel
4925  * is contained in the eeprom map itself.
4926  *
4927  * During init, we copy the eeprom information and channel map
4928  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4929  *
4930  * channel_map_24/52 provides the index in the channel_info array for a
4931  * given channel.  We have to have two separate maps as there is channel
4932  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4933  * band_2
4934  *
4935  * A value of 0xff stored in the channel_map indicates that the channel
4936  * is not supported by the hardware at all.
4937  *
4938  * A value of 0xfe in the channel_map indicates that the channel is not
4939  * valid for Tx with the current hardware.  This means that
4940  * while the system can tune and receive on a given channel, it may not
4941  * be able to associate or transmit any frames on that
4942  * channel.  There is no corresponding channel information for that
4943  * entry.
4944  *
4945  *********************************************************************/
4946
4947 /* 2.4 GHz */
4948 static const u8 iwl3945_eeprom_band_1[14] = {
4949         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4950 };
4951
4952 /* 5.2 GHz bands */
4953 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4954         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4955 };
4956
4957 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4958         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4959 };
4960
4961 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4962         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4963 };
4964
4965 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4966         145, 149, 153, 157, 161, 165
4967 };
4968
4969 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4970                                     int *eeprom_ch_count,
4971                                     const struct iwl3945_eeprom_channel
4972                                     **eeprom_ch_info,
4973                                     const u8 **eeprom_ch_index)
4974 {
4975         switch (band) {
4976         case 1:         /* 2.4GHz band */
4977                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4978                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4979                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4980                 break;
4981         case 2:         /* 4.9GHz band */
4982                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4983                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4984                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4985                 break;
4986         case 3:         /* 5.2GHz band */
4987                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4988                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4989                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4990                 break;
4991         case 4:         /* 5.5GHz band */
4992                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4993                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4994                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4995                 break;
4996         case 5:         /* 5.7GHz band */
4997                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4998                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4999                 *eeprom_ch_index = iwl3945_eeprom_band_5;
5000                 break;
5001         default:
5002                 BUG();
5003                 return;
5004         }
5005 }
5006
5007 /**
5008  * iwl3945_get_channel_info - Find driver's private channel info
5009  *
5010  * Based on band and channel number.
5011  */
5012 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
5013                                                     enum ieee80211_band band, u16 channel)
5014 {
5015         int i;
5016
5017         switch (band) {
5018         case IEEE80211_BAND_5GHZ:
5019                 for (i = 14; i < priv->channel_count; i++) {
5020                         if (priv->channel_info[i].channel == channel)
5021                                 return &priv->channel_info[i];
5022                 }
5023                 break;
5024
5025         case IEEE80211_BAND_2GHZ:
5026                 if (channel >= 1 && channel <= 14)
5027                         return &priv->channel_info[channel - 1];
5028                 break;
5029         case IEEE80211_NUM_BANDS:
5030                 WARN_ON(1);
5031         }
5032
5033         return NULL;
5034 }
5035
5036 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5037                             ? # x " " : "")
5038
5039 /**
5040  * iwl3945_init_channel_map - Set up driver's info for all possible channels
5041  */
5042 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
5043 {
5044         int eeprom_ch_count = 0;
5045         const u8 *eeprom_ch_index = NULL;
5046         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
5047         int band, ch;
5048         struct iwl3945_channel_info *ch_info;
5049
5050         if (priv->channel_count) {
5051                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5052                 return 0;
5053         }
5054
5055         if (priv->eeprom.version < 0x2f) {
5056                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5057                             priv->eeprom.version);
5058                 return -EINVAL;
5059         }
5060
5061         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5062
5063         priv->channel_count =
5064             ARRAY_SIZE(iwl3945_eeprom_band_1) +
5065             ARRAY_SIZE(iwl3945_eeprom_band_2) +
5066             ARRAY_SIZE(iwl3945_eeprom_band_3) +
5067             ARRAY_SIZE(iwl3945_eeprom_band_4) +
5068             ARRAY_SIZE(iwl3945_eeprom_band_5);
5069
5070         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5071
5072         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
5073                                      priv->channel_count, GFP_KERNEL);
5074         if (!priv->channel_info) {
5075                 IWL_ERROR("Could not allocate channel_info\n");
5076                 priv->channel_count = 0;
5077                 return -ENOMEM;
5078         }
5079
5080         ch_info = priv->channel_info;
5081
5082         /* Loop through the 5 EEPROM bands adding them in order to the
5083          * channel map we maintain (that contains additional information than
5084          * what just in the EEPROM) */
5085         for (band = 1; band <= 5; band++) {
5086
5087                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
5088                                         &eeprom_ch_info, &eeprom_ch_index);
5089
5090                 /* Loop through each band adding each of the channels */
5091                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5092                         ch_info->channel = eeprom_ch_index[ch];
5093                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
5094                             IEEE80211_BAND_5GHZ;
5095
5096                         /* permanently store EEPROM's channel regulatory flags
5097                          *   and max power in channel info database. */
5098                         ch_info->eeprom = eeprom_ch_info[ch];
5099
5100                         /* Copy the run-time flags so they are there even on
5101                          * invalid channels */
5102                         ch_info->flags = eeprom_ch_info[ch].flags;
5103
5104                         if (!(is_channel_valid(ch_info))) {
5105                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5106                                                "No traffic\n",
5107                                                ch_info->channel,
5108                                                ch_info->flags,
5109                                                is_channel_a_band(ch_info) ?
5110                                                "5.2" : "2.4");
5111                                 ch_info++;
5112                                 continue;
5113                         }
5114
5115                         /* Initialize regulatory-based run-time data */
5116                         ch_info->max_power_avg = ch_info->curr_txpow =
5117                             eeprom_ch_info[ch].max_power_avg;
5118                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5119                         ch_info->min_power = 0;
5120
5121                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5122                                        " %ddBm): Ad-Hoc %ssupported\n",
5123                                        ch_info->channel,
5124                                        is_channel_a_band(ch_info) ?
5125                                        "5.2" : "2.4",
5126                                        CHECK_AND_PRINT(IBSS),
5127                                        CHECK_AND_PRINT(ACTIVE),
5128                                        CHECK_AND_PRINT(RADAR),
5129                                        CHECK_AND_PRINT(WIDE),
5130                                        CHECK_AND_PRINT(NARROW),
5131                                        CHECK_AND_PRINT(DFS),
5132                                        eeprom_ch_info[ch].flags,
5133                                        eeprom_ch_info[ch].max_power_avg,
5134                                        ((eeprom_ch_info[ch].
5135                                          flags & EEPROM_CHANNEL_IBSS)
5136                                         && !(eeprom_ch_info[ch].
5137                                              flags & EEPROM_CHANNEL_RADAR))
5138                                        ? "" : "not ");
5139
5140                         /* Set the user_txpower_limit to the highest power
5141                          * supported by any channel */
5142                         if (eeprom_ch_info[ch].max_power_avg >
5143                             priv->user_txpower_limit)
5144                                 priv->user_txpower_limit =
5145                                     eeprom_ch_info[ch].max_power_avg;
5146
5147                         ch_info++;
5148                 }
5149         }
5150
5151         /* Set up txpower settings in driver for all channels */
5152         if (iwl3945_txpower_set_from_eeprom(priv))
5153                 return -EIO;
5154
5155         return 0;
5156 }
5157
5158 /*
5159  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
5160  */
5161 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
5162 {
5163         kfree(priv->channel_info);
5164         priv->channel_count = 0;
5165 }
5166
5167 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5168  * sending probe req.  This should be set long enough to hear probe responses
5169  * from more than one AP.  */
5170 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5171 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5172
5173 /* For faster active scanning, scan will move to the next channel if fewer than
5174  * PLCP_QUIET_THRESH packets are heard on this channel within
5175  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5176  * time if it's a quiet channel (nothing responded to our probe, and there's
5177  * no other traffic).
5178  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5179 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5180 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5181
5182 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5183  * Must be set longer than active dwell time.
5184  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5185 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5186 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5187 #define IWL_PASSIVE_DWELL_BASE      (100)
5188 #define IWL_CHANNEL_TUNE_TIME       5
5189
5190 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
5191                                                 enum ieee80211_band band)
5192 {
5193         if (band == IEEE80211_BAND_5GHZ)
5194                 return IWL_ACTIVE_DWELL_TIME_52;
5195         else
5196                 return IWL_ACTIVE_DWELL_TIME_24;
5197 }
5198
5199 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
5200                                           enum ieee80211_band band)
5201 {
5202         u16 active = iwl3945_get_active_dwell_time(priv, band);
5203         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
5204             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5205             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5206
5207         if (iwl3945_is_associated(priv)) {
5208                 /* If we're associated, we clamp the maximum passive
5209                  * dwell time to be 98% of the beacon interval (minus
5210                  * 2 * channel tune time) */
5211                 passive = priv->beacon_int;
5212                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5213                         passive = IWL_PASSIVE_DWELL_BASE;
5214                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5215         }
5216
5217         if (passive <= active)
5218                 passive = active + 1;
5219
5220         return passive;
5221 }
5222
5223 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
5224                                          enum ieee80211_band band,
5225                                      u8 is_active, u8 direct_mask,
5226                                      struct iwl3945_scan_channel *scan_ch)
5227 {
5228         const struct ieee80211_channel *channels = NULL;
5229         const struct ieee80211_supported_band *sband;
5230         const struct iwl3945_channel_info *ch_info;
5231         u16 passive_dwell = 0;
5232         u16 active_dwell = 0;
5233         int added, i;
5234
5235         sband = iwl3945_get_band(priv, band);
5236         if (!sband)
5237                 return 0;
5238
5239         channels = sband->channels;
5240
5241         active_dwell = iwl3945_get_active_dwell_time(priv, band);
5242         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
5243
5244         for (i = 0, added = 0; i < sband->n_channels; i++) {
5245                 if (channels[i].hw_value ==
5246                     le16_to_cpu(priv->active_rxon.channel)) {
5247                         if (iwl3945_is_associated(priv)) {
5248                                 IWL_DEBUG_SCAN
5249                                     ("Skipping current channel %d\n",
5250                                      le16_to_cpu(priv->active_rxon.channel));
5251                                 continue;
5252                         }
5253                 } else if (priv->only_active_channel)
5254                         continue;
5255
5256                 scan_ch->channel = channels[i].hw_value;
5257
5258                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
5259                 if (!is_channel_valid(ch_info)) {
5260                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5261                                        scan_ch->channel);
5262                         continue;
5263                 }
5264
5265                 if (!is_active || is_channel_passive(ch_info) ||
5266                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5267                         scan_ch->type = 0;      /* passive */
5268                 else
5269                         scan_ch->type = 1;      /* active */
5270
5271                 if (scan_ch->type & 1)
5272                         scan_ch->type |= (direct_mask << 1);
5273
5274                 if (is_channel_narrow(ch_info))
5275                         scan_ch->type |= (1 << 7);
5276
5277                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5278                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5279
5280                 /* Set txpower levels to defaults */
5281                 scan_ch->tpc.dsp_atten = 110;
5282                 /* scan_pwr_info->tpc.dsp_atten; */
5283
5284                 /*scan_pwr_info->tpc.tx_gain; */
5285                 if (band == IEEE80211_BAND_5GHZ)
5286                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5287                 else {
5288                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5289                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5290                          * power level:
5291                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5292                          */
5293                 }
5294
5295                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5296                                scan_ch->channel,
5297                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5298                                (scan_ch->type & 1) ?
5299                                active_dwell : passive_dwell);
5300
5301                 scan_ch++;
5302                 added++;
5303         }
5304
5305         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5306         return added;
5307 }
5308
5309 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5310                               struct ieee80211_rate *rates)
5311 {
5312         int i;
5313
5314         for (i = 0; i < IWL_RATE_COUNT; i++) {
5315                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5316                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5317                 rates[i].hw_value_short = i;
5318                 rates[i].flags = 0;
5319                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5320                         /*
5321                          * If CCK != 1M then set short preamble rate flag.
5322                          */
5323                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5324                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5325                 }
5326         }
5327 }
5328
5329 /**
5330  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5331  */
5332 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5333 {
5334         struct iwl3945_channel_info *ch;
5335         struct ieee80211_supported_band *band;
5336         struct ieee80211_channel *channels;
5337         struct ieee80211_channel *geo_ch;
5338         struct ieee80211_rate *rates;
5339         int i = 0;
5340
5341         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5342             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5343                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5344                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5345                 return 0;
5346         }
5347
5348         channels = kzalloc(sizeof(struct ieee80211_channel) *
5349                            priv->channel_count, GFP_KERNEL);
5350         if (!channels)
5351                 return -ENOMEM;
5352
5353         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5354                         GFP_KERNEL);
5355         if (!rates) {
5356                 kfree(channels);
5357                 return -ENOMEM;
5358         }
5359
5360         /* 5.2GHz channels start after the 2.4GHz channels */
5361         band = &priv->bands[IEEE80211_BAND_5GHZ];
5362         band->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5363         band->bitrates = &rates[4];
5364         band->n_bitrates = 8;   /* just OFDM */
5365
5366         band = &priv->bands[IEEE80211_BAND_2GHZ];
5367         band->channels = channels;
5368         band->bitrates = rates;
5369         band->n_bitrates = 12;  /* OFDM & CCK */
5370
5371         priv->ieee_channels = channels;
5372         priv->ieee_rates = rates;
5373
5374         iwl3945_init_hw_rates(priv, rates);
5375
5376         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5377                 ch = &priv->channel_info[i];
5378
5379                 if (!is_channel_valid(ch)) {
5380                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5381                                     "skipping.\n",
5382                                     ch->channel, is_channel_a_band(ch) ?
5383                                     "5.2" : "2.4");
5384                         continue;
5385                 }
5386
5387                 if (is_channel_a_band(ch))
5388                         geo_ch = &priv->bands[IEEE80211_BAND_5GHZ].channels[priv->bands[IEEE80211_BAND_5GHZ].n_channels++];
5389                 else
5390                         geo_ch = &priv->bands[IEEE80211_BAND_2GHZ].channels[priv->bands[IEEE80211_BAND_2GHZ].n_channels++];
5391
5392                 geo_ch->center_freq = ieee80211chan2mhz(ch->channel);
5393                 geo_ch->max_power = ch->max_power_avg;
5394                 geo_ch->max_antenna_gain = 0xff;
5395                 geo_ch->hw_value = ch->channel;
5396
5397                 if (is_channel_valid(ch)) {
5398                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5399                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5400
5401                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5402                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5403
5404                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5405                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5406
5407                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5408                                 priv->max_channel_txpower_limit =
5409                                     ch->max_power_avg;
5410                 } else
5411                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5412         }
5413
5414         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && priv->is_abg) {
5415                 printk(KERN_INFO DRV_NAME
5416                        ": Incorrectly detected BG card as ABG.  Please send "
5417                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5418                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5419                 priv->is_abg = 0;
5420         }
5421
5422         printk(KERN_INFO DRV_NAME
5423                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5424                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5425                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5426
5427         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5428         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5429
5430         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5431
5432         return 0;
5433 }
5434
5435 /*
5436  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5437  */
5438 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5439 {
5440         kfree(priv->ieee_channels);
5441         kfree(priv->ieee_rates);
5442         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5443 }
5444
5445 /******************************************************************************
5446  *
5447  * uCode download functions
5448  *
5449  ******************************************************************************/
5450
5451 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5452 {
5453         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5454         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5455         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5456         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5457         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5458         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5459 }
5460
5461 /**
5462  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5463  *     looking at all data.
5464  */
5465 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5466 {
5467         u32 val;
5468         u32 save_len = len;
5469         int rc = 0;
5470         u32 errcnt;
5471
5472         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5473
5474         rc = iwl3945_grab_nic_access(priv);
5475         if (rc)
5476                 return rc;
5477
5478         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5479
5480         errcnt = 0;
5481         for (; len > 0; len -= sizeof(u32), image++) {
5482                 /* read data comes through single port, auto-incr addr */
5483                 /* NOTE: Use the debugless read so we don't flood kernel log
5484                  * if IWL_DL_IO is set */
5485                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5486                 if (val != le32_to_cpu(*image)) {
5487                         IWL_ERROR("uCode INST section is invalid at "
5488                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5489                                   save_len - len, val, le32_to_cpu(*image));
5490                         rc = -EIO;
5491                         errcnt++;
5492                         if (errcnt >= 20)
5493                                 break;
5494                 }
5495         }
5496
5497         iwl3945_release_nic_access(priv);
5498
5499         if (!errcnt)
5500                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5501
5502         return rc;
5503 }
5504
5505
5506 /**
5507  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5508  *   using sample data 100 bytes apart.  If these sample points are good,
5509  *   it's a pretty good bet that everything between them is good, too.
5510  */
5511 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5512 {
5513         u32 val;
5514         int rc = 0;
5515         u32 errcnt = 0;
5516         u32 i;
5517
5518         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5519
5520         rc = iwl3945_grab_nic_access(priv);
5521         if (rc)
5522                 return rc;
5523
5524         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5525                 /* read data comes through single port, auto-incr addr */
5526                 /* NOTE: Use the debugless read so we don't flood kernel log
5527                  * if IWL_DL_IO is set */
5528                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5529                         i + RTC_INST_LOWER_BOUND);
5530                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5531                 if (val != le32_to_cpu(*image)) {
5532 #if 0 /* Enable this if you want to see details */
5533                         IWL_ERROR("uCode INST section is invalid at "
5534                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5535                                   i, val, *image);
5536 #endif
5537                         rc = -EIO;
5538                         errcnt++;
5539                         if (errcnt >= 3)
5540                                 break;
5541                 }
5542         }
5543
5544         iwl3945_release_nic_access(priv);
5545
5546         return rc;
5547 }
5548
5549
5550 /**
5551  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5552  *    and verify its contents
5553  */
5554 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5555 {
5556         __le32 *image;
5557         u32 len;
5558         int rc = 0;
5559
5560         /* Try bootstrap */
5561         image = (__le32 *)priv->ucode_boot.v_addr;
5562         len = priv->ucode_boot.len;
5563         rc = iwl3945_verify_inst_sparse(priv, image, len);
5564         if (rc == 0) {
5565                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5566                 return 0;
5567         }
5568
5569         /* Try initialize */
5570         image = (__le32 *)priv->ucode_init.v_addr;
5571         len = priv->ucode_init.len;
5572         rc = iwl3945_verify_inst_sparse(priv, image, len);
5573         if (rc == 0) {
5574                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5575                 return 0;
5576         }
5577
5578         /* Try runtime/protocol */
5579         image = (__le32 *)priv->ucode_code.v_addr;
5580         len = priv->ucode_code.len;
5581         rc = iwl3945_verify_inst_sparse(priv, image, len);
5582         if (rc == 0) {
5583                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5584                 return 0;
5585         }
5586
5587         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5588
5589         /* Since nothing seems to match, show first several data entries in
5590          * instruction SRAM, so maybe visual inspection will give a clue.
5591          * Selection of bootstrap image (vs. other images) is arbitrary. */
5592         image = (__le32 *)priv->ucode_boot.v_addr;
5593         len = priv->ucode_boot.len;
5594         rc = iwl3945_verify_inst_full(priv, image, len);
5595
5596         return rc;
5597 }
5598
5599
5600 /* check contents of special bootstrap uCode SRAM */
5601 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5602 {
5603         __le32 *image = priv->ucode_boot.v_addr;
5604         u32 len = priv->ucode_boot.len;
5605         u32 reg;
5606         u32 val;
5607
5608         IWL_DEBUG_INFO("Begin verify bsm\n");
5609
5610         /* verify BSM SRAM contents */
5611         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5612         for (reg = BSM_SRAM_LOWER_BOUND;
5613              reg < BSM_SRAM_LOWER_BOUND + len;
5614              reg += sizeof(u32), image ++) {
5615                 val = iwl3945_read_prph(priv, reg);
5616                 if (val != le32_to_cpu(*image)) {
5617                         IWL_ERROR("BSM uCode verification failed at "
5618                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5619                                   BSM_SRAM_LOWER_BOUND,
5620                                   reg - BSM_SRAM_LOWER_BOUND, len,
5621                                   val, le32_to_cpu(*image));
5622                         return -EIO;
5623                 }
5624         }
5625
5626         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5627
5628         return 0;
5629 }
5630
5631 /**
5632  * iwl3945_load_bsm - Load bootstrap instructions
5633  *
5634  * BSM operation:
5635  *
5636  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5637  * in special SRAM that does not power down during RFKILL.  When powering back
5638  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5639  * the bootstrap program into the on-board processor, and starts it.
5640  *
5641  * The bootstrap program loads (via DMA) instructions and data for a new
5642  * program from host DRAM locations indicated by the host driver in the
5643  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5644  * automatically.
5645  *
5646  * When initializing the NIC, the host driver points the BSM to the
5647  * "initialize" uCode image.  This uCode sets up some internal data, then
5648  * notifies host via "initialize alive" that it is complete.
5649  *
5650  * The host then replaces the BSM_DRAM_* pointer values to point to the
5651  * normal runtime uCode instructions and a backup uCode data cache buffer
5652  * (filled initially with starting data values for the on-board processor),
5653  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5654  * which begins normal operation.
5655  *
5656  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5657  * the backup data cache in DRAM before SRAM is powered down.
5658  *
5659  * When powering back up, the BSM loads the bootstrap program.  This reloads
5660  * the runtime uCode instructions and the backup data cache into SRAM,
5661  * and re-launches the runtime uCode from where it left off.
5662  */
5663 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5664 {
5665         __le32 *image = priv->ucode_boot.v_addr;
5666         u32 len = priv->ucode_boot.len;
5667         dma_addr_t pinst;
5668         dma_addr_t pdata;
5669         u32 inst_len;
5670         u32 data_len;
5671         int rc;
5672         int i;
5673         u32 done;
5674         u32 reg_offset;
5675
5676         IWL_DEBUG_INFO("Begin load bsm\n");
5677
5678         /* make sure bootstrap program is no larger than BSM's SRAM size */
5679         if (len > IWL_MAX_BSM_SIZE)
5680                 return -EINVAL;
5681
5682         /* Tell bootstrap uCode where to find the "Initialize" uCode
5683          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5684          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5685          *        after the "initialize" uCode has run, to point to
5686          *        runtime/protocol instructions and backup data cache. */
5687         pinst = priv->ucode_init.p_addr;
5688         pdata = priv->ucode_init_data.p_addr;
5689         inst_len = priv->ucode_init.len;
5690         data_len = priv->ucode_init_data.len;
5691
5692         rc = iwl3945_grab_nic_access(priv);
5693         if (rc)
5694                 return rc;
5695
5696         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5697         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5698         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5699         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5700
5701         /* Fill BSM memory with bootstrap instructions */
5702         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5703              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5704              reg_offset += sizeof(u32), image++)
5705                 _iwl3945_write_prph(priv, reg_offset,
5706                                           le32_to_cpu(*image));
5707
5708         rc = iwl3945_verify_bsm(priv);
5709         if (rc) {
5710                 iwl3945_release_nic_access(priv);
5711                 return rc;
5712         }
5713
5714         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5715         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5716         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5717                                  RTC_INST_LOWER_BOUND);
5718         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5719
5720         /* Load bootstrap code into instruction SRAM now,
5721          *   to prepare to load "initialize" uCode */
5722         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5723                 BSM_WR_CTRL_REG_BIT_START);
5724
5725         /* Wait for load of bootstrap uCode to finish */
5726         for (i = 0; i < 100; i++) {
5727                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5728                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5729                         break;
5730                 udelay(10);
5731         }
5732         if (i < 100)
5733                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5734         else {
5735                 IWL_ERROR("BSM write did not complete!\n");
5736                 return -EIO;
5737         }
5738
5739         /* Enable future boot loads whenever power management unit triggers it
5740          *   (e.g. when powering back up after power-save shutdown) */
5741         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5742                 BSM_WR_CTRL_REG_BIT_START_EN);
5743
5744         iwl3945_release_nic_access(priv);
5745
5746         return 0;
5747 }
5748
5749 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5750 {
5751         /* Remove all resets to allow NIC to operate */
5752         iwl3945_write32(priv, CSR_RESET, 0);
5753 }
5754
5755 /**
5756  * iwl3945_read_ucode - Read uCode images from disk file.
5757  *
5758  * Copy into buffers for card to fetch via bus-mastering
5759  */
5760 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5761 {
5762         struct iwl3945_ucode *ucode;
5763         int ret = 0;
5764         const struct firmware *ucode_raw;
5765         /* firmware file name contains uCode/driver compatibility version */
5766         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5767         u8 *src;
5768         size_t len;
5769         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5770
5771         /* Ask kernel firmware_class module to get the boot firmware off disk.
5772          * request_firmware() is synchronous, file is in memory on return. */
5773         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5774         if (ret < 0) {
5775                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5776                                 name, ret);
5777                 goto error;
5778         }
5779
5780         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5781                        name, ucode_raw->size);
5782
5783         /* Make sure that we got at least our header! */
5784         if (ucode_raw->size < sizeof(*ucode)) {
5785                 IWL_ERROR("File size way too small!\n");
5786                 ret = -EINVAL;
5787                 goto err_release;
5788         }
5789
5790         /* Data from ucode file:  header followed by uCode images */
5791         ucode = (void *)ucode_raw->data;
5792
5793         ver = le32_to_cpu(ucode->ver);
5794         inst_size = le32_to_cpu(ucode->inst_size);
5795         data_size = le32_to_cpu(ucode->data_size);
5796         init_size = le32_to_cpu(ucode->init_size);
5797         init_data_size = le32_to_cpu(ucode->init_data_size);
5798         boot_size = le32_to_cpu(ucode->boot_size);
5799
5800         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5801         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5802         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5803         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5804         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5805         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5806
5807         /* Verify size of file vs. image size info in file's header */
5808         if (ucode_raw->size < sizeof(*ucode) +
5809                 inst_size + data_size + init_size +
5810                 init_data_size + boot_size) {
5811
5812                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5813                                (int)ucode_raw->size);
5814                 ret = -EINVAL;
5815                 goto err_release;
5816         }
5817
5818         /* Verify that uCode images will fit in card's SRAM */
5819         if (inst_size > IWL_MAX_INST_SIZE) {
5820                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5821                                inst_size);
5822                 ret = -EINVAL;
5823                 goto err_release;
5824         }
5825
5826         if (data_size > IWL_MAX_DATA_SIZE) {
5827                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5828                                data_size);
5829                 ret = -EINVAL;
5830                 goto err_release;
5831         }
5832         if (init_size > IWL_MAX_INST_SIZE) {
5833                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5834                                 init_size);
5835                 ret = -EINVAL;
5836                 goto err_release;
5837         }
5838         if (init_data_size > IWL_MAX_DATA_SIZE) {
5839                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5840                                 init_data_size);
5841                 ret = -EINVAL;
5842                 goto err_release;
5843         }
5844         if (boot_size > IWL_MAX_BSM_SIZE) {
5845                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5846                                 boot_size);
5847                 ret = -EINVAL;
5848                 goto err_release;
5849         }
5850
5851         /* Allocate ucode buffers for card's bus-master loading ... */
5852
5853         /* Runtime instructions and 2 copies of data:
5854          * 1) unmodified from disk
5855          * 2) backup cache for save/restore during power-downs */
5856         priv->ucode_code.len = inst_size;
5857         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5858
5859         priv->ucode_data.len = data_size;
5860         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5861
5862         priv->ucode_data_backup.len = data_size;
5863         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5864
5865         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5866             !priv->ucode_data_backup.v_addr)
5867                 goto err_pci_alloc;
5868
5869         /* Initialization instructions and data */
5870         if (init_size && init_data_size) {
5871                 priv->ucode_init.len = init_size;
5872                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5873
5874                 priv->ucode_init_data.len = init_data_size;
5875                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5876
5877                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5878                         goto err_pci_alloc;
5879         }
5880
5881         /* Bootstrap (instructions only, no data) */
5882         if (boot_size) {
5883                 priv->ucode_boot.len = boot_size;
5884                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5885
5886                 if (!priv->ucode_boot.v_addr)
5887                         goto err_pci_alloc;
5888         }
5889
5890         /* Copy images into buffers for card's bus-master reads ... */
5891
5892         /* Runtime instructions (first block of data in file) */
5893         src = &ucode->data[0];
5894         len = priv->ucode_code.len;
5895         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5896         memcpy(priv->ucode_code.v_addr, src, len);
5897         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5898                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5899
5900         /* Runtime data (2nd block)
5901          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5902         src = &ucode->data[inst_size];
5903         len = priv->ucode_data.len;
5904         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5905         memcpy(priv->ucode_data.v_addr, src, len);
5906         memcpy(priv->ucode_data_backup.v_addr, src, len);
5907
5908         /* Initialization instructions (3rd block) */
5909         if (init_size) {
5910                 src = &ucode->data[inst_size + data_size];
5911                 len = priv->ucode_init.len;
5912                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5913                                len);
5914                 memcpy(priv->ucode_init.v_addr, src, len);
5915         }
5916
5917         /* Initialization data (4th block) */
5918         if (init_data_size) {
5919                 src = &ucode->data[inst_size + data_size + init_size];
5920                 len = priv->ucode_init_data.len;
5921                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5922                                (int)len);
5923                 memcpy(priv->ucode_init_data.v_addr, src, len);
5924         }
5925
5926         /* Bootstrap instructions (5th block) */
5927         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5928         len = priv->ucode_boot.len;
5929         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5930                        (int)len);
5931         memcpy(priv->ucode_boot.v_addr, src, len);
5932
5933         /* We have our copies now, allow OS release its copies */
5934         release_firmware(ucode_raw);
5935         return 0;
5936
5937  err_pci_alloc:
5938         IWL_ERROR("failed to allocate pci memory\n");
5939         ret = -ENOMEM;
5940         iwl3945_dealloc_ucode_pci(priv);
5941
5942  err_release:
5943         release_firmware(ucode_raw);
5944
5945  error:
5946         return ret;
5947 }
5948
5949
5950 /**
5951  * iwl3945_set_ucode_ptrs - Set uCode address location
5952  *
5953  * Tell initialization uCode where to find runtime uCode.
5954  *
5955  * BSM registers initially contain pointers to initialization uCode.
5956  * We need to replace them to load runtime uCode inst and data,
5957  * and to save runtime data when powering down.
5958  */
5959 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5960 {
5961         dma_addr_t pinst;
5962         dma_addr_t pdata;
5963         int rc = 0;
5964         unsigned long flags;
5965
5966         /* bits 31:0 for 3945 */
5967         pinst = priv->ucode_code.p_addr;
5968         pdata = priv->ucode_data_backup.p_addr;
5969
5970         spin_lock_irqsave(&priv->lock, flags);
5971         rc = iwl3945_grab_nic_access(priv);
5972         if (rc) {
5973                 spin_unlock_irqrestore(&priv->lock, flags);
5974                 return rc;
5975         }
5976
5977         /* Tell bootstrap uCode where to find image to load */
5978         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5979         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5980         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5981                                  priv->ucode_data.len);
5982
5983         /* Inst bytecount must be last to set up, bit 31 signals uCode
5984          *   that all new ptr/size info is in place */
5985         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5986                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5987
5988         iwl3945_release_nic_access(priv);
5989
5990         spin_unlock_irqrestore(&priv->lock, flags);
5991
5992         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5993
5994         return rc;
5995 }
5996
5997 /**
5998  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5999  *
6000  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6001  *
6002  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6003  */
6004 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
6005 {
6006         /* Check alive response for "valid" sign from uCode */
6007         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6008                 /* We had an error bringing up the hardware, so take it
6009                  * all the way back down so we can try again */
6010                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6011                 goto restart;
6012         }
6013
6014         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6015          * This is a paranoid check, because we would not have gotten the
6016          * "initialize" alive if code weren't properly loaded.  */
6017         if (iwl3945_verify_ucode(priv)) {
6018                 /* Runtime instruction load was bad;
6019                  * take it all the way back down so we can try again */
6020                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6021                 goto restart;
6022         }
6023
6024         /* Send pointers to protocol/runtime uCode image ... init code will
6025          * load and launch runtime uCode, which will send us another "Alive"
6026          * notification. */
6027         IWL_DEBUG_INFO("Initialization Alive received.\n");
6028         if (iwl3945_set_ucode_ptrs(priv)) {
6029                 /* Runtime instruction load won't happen;
6030                  * take it all the way back down so we can try again */
6031                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6032                 goto restart;
6033         }
6034         return;
6035
6036  restart:
6037         queue_work(priv->workqueue, &priv->restart);
6038 }
6039
6040
6041 /**
6042  * iwl3945_alive_start - called after REPLY_ALIVE notification received
6043  *                   from protocol/runtime uCode (initialization uCode's
6044  *                   Alive gets handled by iwl3945_init_alive_start()).
6045  */
6046 static void iwl3945_alive_start(struct iwl3945_priv *priv)
6047 {
6048         int rc = 0;
6049         int thermal_spin = 0;
6050         u32 rfkill;
6051
6052         IWL_DEBUG_INFO("Runtime Alive received.\n");
6053
6054         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6055                 /* We had an error bringing up the hardware, so take it
6056                  * all the way back down so we can try again */
6057                 IWL_DEBUG_INFO("Alive failed.\n");
6058                 goto restart;
6059         }
6060
6061         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6062          * This is a paranoid check, because we would not have gotten the
6063          * "runtime" alive if code weren't properly loaded.  */
6064         if (iwl3945_verify_ucode(priv)) {
6065                 /* Runtime instruction load was bad;
6066                  * take it all the way back down so we can try again */
6067                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6068                 goto restart;
6069         }
6070
6071         iwl3945_clear_stations_table(priv);
6072
6073         rc = iwl3945_grab_nic_access(priv);
6074         if (rc) {
6075                 IWL_WARNING("Can not read rfkill status from adapter\n");
6076                 return;
6077         }
6078
6079         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
6080         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6081         iwl3945_release_nic_access(priv);
6082
6083         if (rfkill & 0x1) {
6084                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6085                 /* if rfkill is not on, then wait for thermal
6086                  * sensor in adapter to kick in */
6087                 while (iwl3945_hw_get_temperature(priv) == 0) {
6088                         thermal_spin++;
6089                         udelay(10);
6090                 }
6091
6092                 if (thermal_spin)
6093                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6094                                        thermal_spin * 10);
6095         } else
6096                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6097
6098         /* After the ALIVE response, we can send commands to 3945 uCode */
6099         set_bit(STATUS_ALIVE, &priv->status);
6100
6101         /* Clear out the uCode error bit if it is set */
6102         clear_bit(STATUS_FW_ERROR, &priv->status);
6103
6104         if (iwl3945_is_rfkill(priv))
6105                 return;
6106
6107         ieee80211_start_queues(priv->hw);
6108
6109         priv->active_rate = priv->rates_mask;
6110         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6111
6112         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6113
6114         if (iwl3945_is_associated(priv)) {
6115                 struct iwl3945_rxon_cmd *active_rxon =
6116                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
6117
6118                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6119                        sizeof(priv->staging_rxon));
6120                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6121         } else {
6122                 /* Initialize our rx_config data */
6123                 iwl3945_connection_init_rx_config(priv);
6124                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6125         }
6126
6127         /* Configure Bluetooth device coexistence support */
6128         iwl3945_send_bt_config(priv);
6129
6130         /* Configure the adapter for unassociated operation */
6131         iwl3945_commit_rxon(priv);
6132
6133         /* At this point, the NIC is initialized and operational */
6134         priv->notif_missed_beacons = 0;
6135         set_bit(STATUS_READY, &priv->status);
6136
6137         iwl3945_reg_txpower_periodic(priv);
6138
6139         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6140         wake_up_interruptible(&priv->wait_command_queue);
6141
6142         if (priv->error_recovering)
6143                 iwl3945_error_recovery(priv);
6144
6145         return;
6146
6147  restart:
6148         queue_work(priv->workqueue, &priv->restart);
6149 }
6150
6151 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
6152
6153 static void __iwl3945_down(struct iwl3945_priv *priv)
6154 {
6155         unsigned long flags;
6156         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6157         struct ieee80211_conf *conf = NULL;
6158
6159         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6160
6161         conf = ieee80211_get_hw_conf(priv->hw);
6162
6163         if (!exit_pending)
6164                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6165
6166         iwl3945_clear_stations_table(priv);
6167
6168         /* Unblock any waiting calls */
6169         wake_up_interruptible_all(&priv->wait_command_queue);
6170
6171         /* Wipe out the EXIT_PENDING status bit if we are not actually
6172          * exiting the module */
6173         if (!exit_pending)
6174                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6175
6176         /* stop and reset the on-board processor */
6177         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6178
6179         /* tell the device to stop sending interrupts */
6180         iwl3945_disable_interrupts(priv);
6181
6182         if (priv->mac80211_registered)
6183                 ieee80211_stop_queues(priv->hw);
6184
6185         /* If we have not previously called iwl3945_init() then
6186          * clear all bits but the RF Kill and SUSPEND bits and return */
6187         if (!iwl3945_is_init(priv)) {
6188                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6189                                         STATUS_RF_KILL_HW |
6190                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6191                                         STATUS_RF_KILL_SW |
6192                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6193                                         STATUS_GEO_CONFIGURED |
6194                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6195                                         STATUS_IN_SUSPEND;
6196                 goto exit;
6197         }
6198
6199         /* ...otherwise clear out all the status bits but the RF Kill and
6200          * SUSPEND bits and continue taking the NIC down. */
6201         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6202                                 STATUS_RF_KILL_HW |
6203                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6204                                 STATUS_RF_KILL_SW |
6205                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6206                                 STATUS_GEO_CONFIGURED |
6207                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6208                                 STATUS_IN_SUSPEND |
6209                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6210                                 STATUS_FW_ERROR;
6211
6212         spin_lock_irqsave(&priv->lock, flags);
6213         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6214         spin_unlock_irqrestore(&priv->lock, flags);
6215
6216         iwl3945_hw_txq_ctx_stop(priv);
6217         iwl3945_hw_rxq_stop(priv);
6218
6219         spin_lock_irqsave(&priv->lock, flags);
6220         if (!iwl3945_grab_nic_access(priv)) {
6221                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6222                                          APMG_CLK_VAL_DMA_CLK_RQT);
6223                 iwl3945_release_nic_access(priv);
6224         }
6225         spin_unlock_irqrestore(&priv->lock, flags);
6226
6227         udelay(5);
6228
6229         iwl3945_hw_nic_stop_master(priv);
6230         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6231         iwl3945_hw_nic_reset(priv);
6232
6233  exit:
6234         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6235
6236         if (priv->ibss_beacon)
6237                 dev_kfree_skb(priv->ibss_beacon);
6238         priv->ibss_beacon = NULL;
6239
6240         /* clear out any free frames */
6241         iwl3945_clear_free_frames(priv);
6242 }
6243
6244 static void iwl3945_down(struct iwl3945_priv *priv)
6245 {
6246         mutex_lock(&priv->mutex);
6247         __iwl3945_down(priv);
6248         mutex_unlock(&priv->mutex);
6249
6250         iwl3945_cancel_deferred_work(priv);
6251 }
6252
6253 #define MAX_HW_RESTARTS 5
6254
6255 static int __iwl3945_up(struct iwl3945_priv *priv)
6256 {
6257         int rc, i;
6258
6259         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6260                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6261                 return -EIO;
6262         }
6263
6264         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6265                 IWL_WARNING("Radio disabled by SW RF kill (module "
6266                             "parameter)\n");
6267                 return -ENODEV;
6268         }
6269
6270         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6271                 IWL_ERROR("ucode not available for device bringup\n");
6272                 return -EIO;
6273         }
6274
6275         /* If platform's RF_KILL switch is NOT set to KILL */
6276         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6277                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6278                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6279         else {
6280                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6281                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6282                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6283                         return -ENODEV;
6284                 }
6285         }
6286
6287         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6288
6289         rc = iwl3945_hw_nic_init(priv);
6290         if (rc) {
6291                 IWL_ERROR("Unable to int nic\n");
6292                 return rc;
6293         }
6294
6295         /* make sure rfkill handshake bits are cleared */
6296         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6297         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6298                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6299
6300         /* clear (again), then enable host interrupts */
6301         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6302         iwl3945_enable_interrupts(priv);
6303
6304         /* really make sure rfkill handshake bits are cleared */
6305         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6306         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6307
6308         /* Copy original ucode data image from disk into backup cache.
6309          * This will be used to initialize the on-board processor's
6310          * data SRAM for a clean start when the runtime program first loads. */
6311         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6312                priv->ucode_data.len);
6313
6314         /* We return success when we resume from suspend and rf_kill is on. */
6315         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6316                 return 0;
6317
6318         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6319
6320                 iwl3945_clear_stations_table(priv);
6321
6322                 /* load bootstrap state machine,
6323                  * load bootstrap program into processor's memory,
6324                  * prepare to load the "initialize" uCode */
6325                 rc = iwl3945_load_bsm(priv);
6326
6327                 if (rc) {
6328                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6329                         continue;
6330                 }
6331
6332                 /* start card; "initialize" will load runtime ucode */
6333                 iwl3945_nic_start(priv);
6334
6335                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6336
6337                 return 0;
6338         }
6339
6340         set_bit(STATUS_EXIT_PENDING, &priv->status);
6341         __iwl3945_down(priv);
6342
6343         /* tried to restart and config the device for as long as our
6344          * patience could withstand */
6345         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6346         return -EIO;
6347 }
6348
6349
6350 /*****************************************************************************
6351  *
6352  * Workqueue callbacks
6353  *
6354  *****************************************************************************/
6355
6356 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6357 {
6358         struct iwl3945_priv *priv =
6359             container_of(data, struct iwl3945_priv, init_alive_start.work);
6360
6361         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6362                 return;
6363
6364         mutex_lock(&priv->mutex);
6365         iwl3945_init_alive_start(priv);
6366         mutex_unlock(&priv->mutex);
6367 }
6368
6369 static void iwl3945_bg_alive_start(struct work_struct *data)
6370 {
6371         struct iwl3945_priv *priv =
6372             container_of(data, struct iwl3945_priv, alive_start.work);
6373
6374         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6375                 return;
6376
6377         mutex_lock(&priv->mutex);
6378         iwl3945_alive_start(priv);
6379         mutex_unlock(&priv->mutex);
6380 }
6381
6382 static void iwl3945_bg_rf_kill(struct work_struct *work)
6383 {
6384         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6385
6386         wake_up_interruptible(&priv->wait_command_queue);
6387
6388         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6389                 return;
6390
6391         mutex_lock(&priv->mutex);
6392
6393         if (!iwl3945_is_rfkill(priv)) {
6394                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6395                           "HW and/or SW RF Kill no longer active, restarting "
6396                           "device\n");
6397                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6398                         queue_work(priv->workqueue, &priv->restart);
6399         } else {
6400
6401                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6402                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6403                                           "disabled by SW switch\n");
6404                 else
6405                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6406                                     "Kill switch must be turned off for "
6407                                     "wireless networking to work.\n");
6408         }
6409         mutex_unlock(&priv->mutex);
6410 }
6411
6412 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6413
6414 static void iwl3945_bg_scan_check(struct work_struct *data)
6415 {
6416         struct iwl3945_priv *priv =
6417             container_of(data, struct iwl3945_priv, scan_check.work);
6418
6419         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6420                 return;
6421
6422         mutex_lock(&priv->mutex);
6423         if (test_bit(STATUS_SCANNING, &priv->status) ||
6424             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6425                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6426                           "Scan completion watchdog resetting adapter (%dms)\n",
6427                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6428
6429                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6430                         iwl3945_send_scan_abort(priv);
6431         }
6432         mutex_unlock(&priv->mutex);
6433 }
6434
6435 static void iwl3945_bg_request_scan(struct work_struct *data)
6436 {
6437         struct iwl3945_priv *priv =
6438             container_of(data, struct iwl3945_priv, request_scan);
6439         struct iwl3945_host_cmd cmd = {
6440                 .id = REPLY_SCAN_CMD,
6441                 .len = sizeof(struct iwl3945_scan_cmd),
6442                 .meta.flags = CMD_SIZE_HUGE,
6443         };
6444         int rc = 0;
6445         struct iwl3945_scan_cmd *scan;
6446         struct ieee80211_conf *conf = NULL;
6447         u8 direct_mask;
6448         enum ieee80211_band band;
6449
6450         conf = ieee80211_get_hw_conf(priv->hw);
6451
6452         mutex_lock(&priv->mutex);
6453
6454         if (!iwl3945_is_ready(priv)) {
6455                 IWL_WARNING("request scan called when driver not ready.\n");
6456                 goto done;
6457         }
6458
6459         /* Make sure the scan wasn't cancelled before this queued work
6460          * was given the chance to run... */
6461         if (!test_bit(STATUS_SCANNING, &priv->status))
6462                 goto done;
6463
6464         /* This should never be called or scheduled if there is currently
6465          * a scan active in the hardware. */
6466         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6467                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6468                                "Ignoring second request.\n");
6469                 rc = -EIO;
6470                 goto done;
6471         }
6472
6473         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6474                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6475                 goto done;
6476         }
6477
6478         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6479                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6480                 goto done;
6481         }
6482
6483         if (iwl3945_is_rfkill(priv)) {
6484                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6485                 goto done;
6486         }
6487
6488         if (!test_bit(STATUS_READY, &priv->status)) {
6489                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6490                 goto done;
6491         }
6492
6493         if (!priv->scan_bands) {
6494                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6495                 goto done;
6496         }
6497
6498         if (!priv->scan) {
6499                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6500                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6501                 if (!priv->scan) {
6502                         rc = -ENOMEM;
6503                         goto done;
6504                 }
6505         }
6506         scan = priv->scan;
6507         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6508
6509         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6510         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6511
6512         if (iwl3945_is_associated(priv)) {
6513                 u16 interval = 0;
6514                 u32 extra;
6515                 u32 suspend_time = 100;
6516                 u32 scan_suspend_time = 100;
6517                 unsigned long flags;
6518
6519                 IWL_DEBUG_INFO("Scanning while associated...\n");
6520
6521                 spin_lock_irqsave(&priv->lock, flags);
6522                 interval = priv->beacon_int;
6523                 spin_unlock_irqrestore(&priv->lock, flags);
6524
6525                 scan->suspend_time = 0;
6526                 scan->max_out_time = cpu_to_le32(200 * 1024);
6527                 if (!interval)
6528                         interval = suspend_time;
6529                 /*
6530                  * suspend time format:
6531                  *  0-19: beacon interval in usec (time before exec.)
6532                  * 20-23: 0
6533                  * 24-31: number of beacons (suspend between channels)
6534                  */
6535
6536                 extra = (suspend_time / interval) << 24;
6537                 scan_suspend_time = 0xFF0FFFFF &
6538                     (extra | ((suspend_time % interval) * 1024));
6539
6540                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6541                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6542                                scan_suspend_time, interval);
6543         }
6544
6545         /* We should add the ability for user to lock to PASSIVE ONLY */
6546         if (priv->one_direct_scan) {
6547                 IWL_DEBUG_SCAN
6548                     ("Kicking off one direct scan for '%s'\n",
6549                      iwl3945_escape_essid(priv->direct_ssid,
6550                                       priv->direct_ssid_len));
6551                 scan->direct_scan[0].id = WLAN_EID_SSID;
6552                 scan->direct_scan[0].len = priv->direct_ssid_len;
6553                 memcpy(scan->direct_scan[0].ssid,
6554                        priv->direct_ssid, priv->direct_ssid_len);
6555                 direct_mask = 1;
6556         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6557                 scan->direct_scan[0].id = WLAN_EID_SSID;
6558                 scan->direct_scan[0].len = priv->essid_len;
6559                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6560                 direct_mask = 1;
6561         } else
6562                 direct_mask = 0;
6563
6564         /* We don't build a direct scan probe request; the uCode will do
6565          * that based on the direct_mask added to each channel entry */
6566         scan->tx_cmd.len = cpu_to_le16(
6567                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6568                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6569         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6570         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6571         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6572
6573         /* flags + rate selection */
6574
6575         switch (priv->scan_bands) {
6576         case 2:
6577                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6578                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6579                 scan->good_CRC_th = 0;
6580                 band = IEEE80211_BAND_2GHZ;
6581                 break;
6582
6583         case 1:
6584                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6585                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6586                 band = IEEE80211_BAND_5GHZ;
6587                 break;
6588
6589         default:
6590                 IWL_WARNING("Invalid scan band count\n");
6591                 goto done;
6592         }
6593
6594         /* select Rx antennas */
6595         scan->flags |= iwl3945_get_antenna_flags(priv);
6596
6597         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6598                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6599
6600         if (direct_mask)
6601                 IWL_DEBUG_SCAN
6602                     ("Initiating direct scan for %s.\n",
6603                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6604         else
6605                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6606
6607         scan->channel_count =
6608                 iwl3945_get_channels_for_scan(
6609                         priv, band, 1, /* active */
6610                         direct_mask,
6611                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6612
6613         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6614             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6615         cmd.data = scan;
6616         scan->len = cpu_to_le16(cmd.len);
6617
6618         set_bit(STATUS_SCAN_HW, &priv->status);
6619         rc = iwl3945_send_cmd_sync(priv, &cmd);
6620         if (rc)
6621                 goto done;
6622
6623         queue_delayed_work(priv->workqueue, &priv->scan_check,
6624                            IWL_SCAN_CHECK_WATCHDOG);
6625
6626         mutex_unlock(&priv->mutex);
6627         return;
6628
6629  done:
6630         /* inform mac80211 scan aborted */
6631         queue_work(priv->workqueue, &priv->scan_completed);
6632         mutex_unlock(&priv->mutex);
6633 }
6634
6635 static void iwl3945_bg_up(struct work_struct *data)
6636 {
6637         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6638
6639         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6640                 return;
6641
6642         mutex_lock(&priv->mutex);
6643         __iwl3945_up(priv);
6644         mutex_unlock(&priv->mutex);
6645 }
6646
6647 static void iwl3945_bg_restart(struct work_struct *data)
6648 {
6649         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6650
6651         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6652                 return;
6653
6654         iwl3945_down(priv);
6655         queue_work(priv->workqueue, &priv->up);
6656 }
6657
6658 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6659 {
6660         struct iwl3945_priv *priv =
6661             container_of(data, struct iwl3945_priv, rx_replenish);
6662
6663         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6664                 return;
6665
6666         mutex_lock(&priv->mutex);
6667         iwl3945_rx_replenish(priv);
6668         mutex_unlock(&priv->mutex);
6669 }
6670
6671 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6672
6673 static void iwl3945_bg_post_associate(struct work_struct *data)
6674 {
6675         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6676                                              post_associate.work);
6677
6678         int rc = 0;
6679         struct ieee80211_conf *conf = NULL;
6680         DECLARE_MAC_BUF(mac);
6681
6682         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6683                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6684                 return;
6685         }
6686
6687
6688         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6689                         priv->assoc_id,
6690                         print_mac(mac, priv->active_rxon.bssid_addr));
6691
6692         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6693                 return;
6694
6695         mutex_lock(&priv->mutex);
6696
6697         if (!priv->vif || !priv->is_open) {
6698                 mutex_unlock(&priv->mutex);
6699                 return;
6700         }
6701         iwl3945_scan_cancel_timeout(priv, 200);
6702
6703         conf = ieee80211_get_hw_conf(priv->hw);
6704
6705         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6706         iwl3945_commit_rxon(priv);
6707
6708         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6709         iwl3945_setup_rxon_timing(priv);
6710         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6711                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6712         if (rc)
6713                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6714                             "Attempting to continue.\n");
6715
6716         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6717
6718         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6719
6720         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6721                         priv->assoc_id, priv->beacon_int);
6722
6723         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6724                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6725         else
6726                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6727
6728         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6729                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6730                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6731                 else
6732                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6733
6734                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6735                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6736
6737         }
6738
6739         iwl3945_commit_rxon(priv);
6740
6741         switch (priv->iw_mode) {
6742         case IEEE80211_IF_TYPE_STA:
6743                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6744                 break;
6745
6746         case IEEE80211_IF_TYPE_IBSS:
6747
6748                 /* clear out the station table */
6749                 iwl3945_clear_stations_table(priv);
6750
6751                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6752                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6753                 iwl3945_sync_sta(priv, IWL_STA_ID,
6754                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6755                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6756                                  CMD_ASYNC);
6757                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6758                 iwl3945_send_beacon_cmd(priv);
6759
6760                 break;
6761
6762         default:
6763                  IWL_ERROR("%s Should not be called in %d mode\n",
6764                            __FUNCTION__, priv->iw_mode);
6765                 break;
6766         }
6767
6768         iwl3945_sequence_reset(priv);
6769
6770         iwl3945_activate_qos(priv, 0);
6771
6772         /* we have just associated, don't start scan too early */
6773         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6774         mutex_unlock(&priv->mutex);
6775 }
6776
6777 static void iwl3945_bg_abort_scan(struct work_struct *work)
6778 {
6779         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6780
6781         if (!iwl3945_is_ready(priv))
6782                 return;
6783
6784         mutex_lock(&priv->mutex);
6785
6786         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6787         iwl3945_send_scan_abort(priv);
6788
6789         mutex_unlock(&priv->mutex);
6790 }
6791
6792 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6793
6794 static void iwl3945_bg_scan_completed(struct work_struct *work)
6795 {
6796         struct iwl3945_priv *priv =
6797             container_of(work, struct iwl3945_priv, scan_completed);
6798
6799         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6800
6801         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6802                 return;
6803
6804         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6805                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6806
6807         ieee80211_scan_completed(priv->hw);
6808
6809         /* Since setting the TXPOWER may have been deferred while
6810          * performing the scan, fire one off */
6811         mutex_lock(&priv->mutex);
6812         iwl3945_hw_reg_send_txpower(priv);
6813         mutex_unlock(&priv->mutex);
6814 }
6815
6816 /*****************************************************************************
6817  *
6818  * mac80211 entry point functions
6819  *
6820  *****************************************************************************/
6821
6822 #define UCODE_READY_TIMEOUT     (2 * HZ)
6823
6824 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6825 {
6826         struct iwl3945_priv *priv = hw->priv;
6827         int ret;
6828
6829         IWL_DEBUG_MAC80211("enter\n");
6830
6831         if (pci_enable_device(priv->pci_dev)) {
6832                 IWL_ERROR("Fail to pci_enable_device\n");
6833                 return -ENODEV;
6834         }
6835         pci_restore_state(priv->pci_dev);
6836         pci_enable_msi(priv->pci_dev);
6837
6838         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6839                           DRV_NAME, priv);
6840         if (ret) {
6841                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6842                 goto out_disable_msi;
6843         }
6844
6845         /* we should be verifying the device is ready to be opened */
6846         mutex_lock(&priv->mutex);
6847
6848         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6849         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6850          * ucode filename and max sizes are card-specific. */
6851
6852         if (!priv->ucode_code.len) {
6853                 ret = iwl3945_read_ucode(priv);
6854                 if (ret) {
6855                         IWL_ERROR("Could not read microcode: %d\n", ret);
6856                         mutex_unlock(&priv->mutex);
6857                         goto out_release_irq;
6858                 }
6859         }
6860
6861         ret = __iwl3945_up(priv);
6862
6863         mutex_unlock(&priv->mutex);
6864
6865         if (ret)
6866                 goto out_release_irq;
6867
6868         IWL_DEBUG_INFO("Start UP work.\n");
6869
6870         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6871                 return 0;
6872
6873         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6874          * mac80211 will not be run successfully. */
6875         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6876                         test_bit(STATUS_READY, &priv->status),
6877                         UCODE_READY_TIMEOUT);
6878         if (!ret) {
6879                 if (!test_bit(STATUS_READY, &priv->status)) {
6880                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6881                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6882                         ret = -ETIMEDOUT;
6883                         goto out_release_irq;
6884                 }
6885         }
6886
6887         priv->is_open = 1;
6888         IWL_DEBUG_MAC80211("leave\n");
6889         return 0;
6890
6891 out_release_irq:
6892         free_irq(priv->pci_dev->irq, priv);
6893 out_disable_msi:
6894         pci_disable_msi(priv->pci_dev);
6895         pci_disable_device(priv->pci_dev);
6896         priv->is_open = 0;
6897         IWL_DEBUG_MAC80211("leave - failed\n");
6898         return ret;
6899 }
6900
6901 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6902 {
6903         struct iwl3945_priv *priv = hw->priv;
6904
6905         IWL_DEBUG_MAC80211("enter\n");
6906
6907         if (!priv->is_open) {
6908                 IWL_DEBUG_MAC80211("leave - skip\n");
6909                 return;
6910         }
6911
6912         priv->is_open = 0;
6913
6914         if (iwl3945_is_ready_rf(priv)) {
6915                 /* stop mac, cancel any scan request and clear
6916                  * RXON_FILTER_ASSOC_MSK BIT
6917                  */
6918                 mutex_lock(&priv->mutex);
6919                 iwl3945_scan_cancel_timeout(priv, 100);
6920                 cancel_delayed_work(&priv->post_associate);
6921                 mutex_unlock(&priv->mutex);
6922         }
6923
6924         iwl3945_down(priv);
6925
6926         flush_workqueue(priv->workqueue);
6927         free_irq(priv->pci_dev->irq, priv);
6928         pci_disable_msi(priv->pci_dev);
6929         pci_save_state(priv->pci_dev);
6930         pci_disable_device(priv->pci_dev);
6931
6932         IWL_DEBUG_MAC80211("leave\n");
6933 }
6934
6935 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6936                       struct ieee80211_tx_control *ctl)
6937 {
6938         struct iwl3945_priv *priv = hw->priv;
6939
6940         IWL_DEBUG_MAC80211("enter\n");
6941
6942         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6943                 IWL_DEBUG_MAC80211("leave - monitor\n");
6944                 return -1;
6945         }
6946
6947         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6948                      ctl->tx_rate->bitrate);
6949
6950         if (iwl3945_tx_skb(priv, skb, ctl))
6951                 dev_kfree_skb_any(skb);
6952
6953         IWL_DEBUG_MAC80211("leave\n");
6954         return 0;
6955 }
6956
6957 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6958                                  struct ieee80211_if_init_conf *conf)
6959 {
6960         struct iwl3945_priv *priv = hw->priv;
6961         unsigned long flags;
6962         DECLARE_MAC_BUF(mac);
6963
6964         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6965
6966         if (priv->vif) {
6967                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6968                 return -EOPNOTSUPP;
6969         }
6970
6971         spin_lock_irqsave(&priv->lock, flags);
6972         priv->vif = conf->vif;
6973
6974         spin_unlock_irqrestore(&priv->lock, flags);
6975
6976         mutex_lock(&priv->mutex);
6977
6978         if (conf->mac_addr) {
6979                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6980                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6981         }
6982
6983         if (iwl3945_is_ready(priv))
6984                 iwl3945_set_mode(priv, conf->type);
6985
6986         mutex_unlock(&priv->mutex);
6987
6988         IWL_DEBUG_MAC80211("leave\n");
6989         return 0;
6990 }
6991
6992 /**
6993  * iwl3945_mac_config - mac80211 config callback
6994  *
6995  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6996  * be set inappropriately and the driver currently sets the hardware up to
6997  * use it whenever needed.
6998  */
6999 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7000 {
7001         struct iwl3945_priv *priv = hw->priv;
7002         const struct iwl3945_channel_info *ch_info;
7003         unsigned long flags;
7004         int ret = 0;
7005
7006         mutex_lock(&priv->mutex);
7007         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
7008
7009         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7010
7011         if (!iwl3945_is_ready(priv)) {
7012                 IWL_DEBUG_MAC80211("leave - not ready\n");
7013                 ret = -EIO;
7014                 goto out;
7015         }
7016
7017         if (unlikely(!iwl3945_param_disable_hw_scan &&
7018                      test_bit(STATUS_SCANNING, &priv->status))) {
7019                 IWL_DEBUG_MAC80211("leave - scanning\n");
7020                 set_bit(STATUS_CONF_PENDING, &priv->status);
7021                 mutex_unlock(&priv->mutex);
7022                 return 0;
7023         }
7024
7025         spin_lock_irqsave(&priv->lock, flags);
7026
7027         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
7028                                            conf->channel->hw_value);
7029         if (!is_channel_valid(ch_info)) {
7030                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7031                                conf->channel->hw_value, conf->channel->band);
7032                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7033                 spin_unlock_irqrestore(&priv->lock, flags);
7034                 ret = -EINVAL;
7035                 goto out;
7036         }
7037
7038         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
7039
7040         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
7041
7042         /* The list of supported rates and rate mask can be different
7043          * for each phymode; since the phymode may have changed, reset
7044          * the rate mask to what mac80211 lists */
7045         iwl3945_set_rate(priv);
7046
7047         spin_unlock_irqrestore(&priv->lock, flags);
7048
7049 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7050         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7051                 iwl3945_hw_channel_switch(priv, conf->channel);
7052                 goto out;
7053         }
7054 #endif
7055
7056         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
7057
7058         if (!conf->radio_enabled) {
7059                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7060                 goto out;
7061         }
7062
7063         if (iwl3945_is_rfkill(priv)) {
7064                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7065                 ret = -EIO;
7066                 goto out;
7067         }
7068
7069         iwl3945_set_rate(priv);
7070
7071         if (memcmp(&priv->active_rxon,
7072                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7073                 iwl3945_commit_rxon(priv);
7074         else
7075                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7076
7077         IWL_DEBUG_MAC80211("leave\n");
7078
7079 out:
7080         clear_bit(STATUS_CONF_PENDING, &priv->status);
7081         mutex_unlock(&priv->mutex);
7082         return ret;
7083 }
7084
7085 static void iwl3945_config_ap(struct iwl3945_priv *priv)
7086 {
7087         int rc = 0;
7088
7089         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7090                 return;
7091
7092         /* The following should be done only at AP bring up */
7093         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7094
7095                 /* RXON - unassoc (to set timing command) */
7096                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7097                 iwl3945_commit_rxon(priv);
7098
7099                 /* RXON Timing */
7100                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
7101                 iwl3945_setup_rxon_timing(priv);
7102                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7103                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7104                 if (rc)
7105                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7106                                         "Attempting to continue.\n");
7107
7108                 /* FIXME: what should be the assoc_id for AP? */
7109                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7110                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7111                         priv->staging_rxon.flags |=
7112                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7113                 else
7114                         priv->staging_rxon.flags &=
7115                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7116
7117                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7118                         if (priv->assoc_capability &
7119                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7120                                 priv->staging_rxon.flags |=
7121                                         RXON_FLG_SHORT_SLOT_MSK;
7122                         else
7123                                 priv->staging_rxon.flags &=
7124                                         ~RXON_FLG_SHORT_SLOT_MSK;
7125
7126                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7127                                 priv->staging_rxon.flags &=
7128                                         ~RXON_FLG_SHORT_SLOT_MSK;
7129                 }
7130                 /* restore RXON assoc */
7131                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7132                 iwl3945_commit_rxon(priv);
7133                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
7134         }
7135         iwl3945_send_beacon_cmd(priv);
7136
7137         /* FIXME - we need to add code here to detect a totally new
7138          * configuration, reset the AP, unassoc, rxon timing, assoc,
7139          * clear sta table, add BCAST sta... */
7140 }
7141
7142 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
7143                                         struct ieee80211_vif *vif,
7144                                     struct ieee80211_if_conf *conf)
7145 {
7146         struct iwl3945_priv *priv = hw->priv;
7147         DECLARE_MAC_BUF(mac);
7148         unsigned long flags;
7149         int rc;
7150
7151         if (conf == NULL)
7152                 return -EIO;
7153
7154         /* XXX: this MUST use conf->mac_addr */
7155
7156         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7157             (!conf->beacon || !conf->ssid_len)) {
7158                 IWL_DEBUG_MAC80211
7159                     ("Leaving in AP mode because HostAPD is not ready.\n");
7160                 return 0;
7161         }
7162
7163         if (!iwl3945_is_alive(priv))
7164                 return -EAGAIN;
7165
7166         mutex_lock(&priv->mutex);
7167
7168         if (conf->bssid)
7169                 IWL_DEBUG_MAC80211("bssid: %s\n",
7170                                    print_mac(mac, conf->bssid));
7171
7172 /*
7173  * very dubious code was here; the probe filtering flag is never set:
7174  *
7175         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7176             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7177  */
7178         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7179                 IWL_DEBUG_MAC80211("leave - scanning\n");
7180                 mutex_unlock(&priv->mutex);
7181                 return 0;
7182         }
7183
7184         if (priv->vif != vif) {
7185                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7186                 mutex_unlock(&priv->mutex);
7187                 return 0;
7188         }
7189
7190         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7191                 if (!conf->bssid) {
7192                         conf->bssid = priv->mac_addr;
7193                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7194                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7195                                            print_mac(mac, conf->bssid));
7196                 }
7197                 if (priv->ibss_beacon)
7198                         dev_kfree_skb(priv->ibss_beacon);
7199
7200                 priv->ibss_beacon = conf->beacon;
7201         }
7202
7203         if (iwl3945_is_rfkill(priv))
7204                 goto done;
7205
7206         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7207             !is_multicast_ether_addr(conf->bssid)) {
7208                 /* If there is currently a HW scan going on in the background
7209                  * then we need to cancel it else the RXON below will fail. */
7210                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7211                         IWL_WARNING("Aborted scan still in progress "
7212                                     "after 100ms\n");
7213                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7214                         mutex_unlock(&priv->mutex);
7215                         return -EAGAIN;
7216                 }
7217                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7218
7219                 /* TODO: Audit driver for usage of these members and see
7220                  * if mac80211 deprecates them (priv->bssid looks like it
7221                  * shouldn't be there, but I haven't scanned the IBSS code
7222                  * to verify) - jpk */
7223                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7224
7225                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7226                         iwl3945_config_ap(priv);
7227                 else {
7228                         rc = iwl3945_commit_rxon(priv);
7229                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7230                                 iwl3945_add_station(priv,
7231                                         priv->active_rxon.bssid_addr, 1, 0);
7232                 }
7233
7234         } else {
7235                 iwl3945_scan_cancel_timeout(priv, 100);
7236                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7237                 iwl3945_commit_rxon(priv);
7238         }
7239
7240  done:
7241         spin_lock_irqsave(&priv->lock, flags);
7242         if (!conf->ssid_len)
7243                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7244         else
7245                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7246
7247         priv->essid_len = conf->ssid_len;
7248         spin_unlock_irqrestore(&priv->lock, flags);
7249
7250         IWL_DEBUG_MAC80211("leave\n");
7251         mutex_unlock(&priv->mutex);
7252
7253         return 0;
7254 }
7255
7256 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7257                                  unsigned int changed_flags,
7258                                  unsigned int *total_flags,
7259                                  int mc_count, struct dev_addr_list *mc_list)
7260 {
7261         /*
7262          * XXX: dummy
7263          * see also iwl3945_connection_init_rx_config
7264          */
7265         *total_flags = 0;
7266 }
7267
7268 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7269                                      struct ieee80211_if_init_conf *conf)
7270 {
7271         struct iwl3945_priv *priv = hw->priv;
7272
7273         IWL_DEBUG_MAC80211("enter\n");
7274
7275         mutex_lock(&priv->mutex);
7276
7277         if (iwl3945_is_ready_rf(priv)) {
7278                 iwl3945_scan_cancel_timeout(priv, 100);
7279                 cancel_delayed_work(&priv->post_associate);
7280                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7281                 iwl3945_commit_rxon(priv);
7282         }
7283         if (priv->vif == conf->vif) {
7284                 priv->vif = NULL;
7285                 memset(priv->bssid, 0, ETH_ALEN);
7286                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7287                 priv->essid_len = 0;
7288         }
7289         mutex_unlock(&priv->mutex);
7290
7291         IWL_DEBUG_MAC80211("leave\n");
7292 }
7293
7294 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7295 {
7296         int rc = 0;
7297         unsigned long flags;
7298         struct iwl3945_priv *priv = hw->priv;
7299
7300         IWL_DEBUG_MAC80211("enter\n");
7301
7302         mutex_lock(&priv->mutex);
7303         spin_lock_irqsave(&priv->lock, flags);
7304
7305         if (!iwl3945_is_ready_rf(priv)) {
7306                 rc = -EIO;
7307                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7308                 goto out_unlock;
7309         }
7310
7311         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7312                 rc = -EIO;
7313                 IWL_ERROR("ERROR: APs don't scan\n");
7314                 goto out_unlock;
7315         }
7316
7317         /* we don't schedule scan within next_scan_jiffies period */
7318         if (priv->next_scan_jiffies &&
7319                         time_after(priv->next_scan_jiffies, jiffies)) {
7320                 rc = -EAGAIN;
7321                 goto out_unlock;
7322         }
7323         /* if we just finished scan ask for delay */
7324         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7325                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7326                 rc = -EAGAIN;
7327                 goto out_unlock;
7328         }
7329         if (len) {
7330                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7331                                iwl3945_escape_essid(ssid, len), (int)len);
7332
7333                 priv->one_direct_scan = 1;
7334                 priv->direct_ssid_len = (u8)
7335                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7336                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7337         } else
7338                 priv->one_direct_scan = 0;
7339
7340         rc = iwl3945_scan_initiate(priv);
7341
7342         IWL_DEBUG_MAC80211("leave\n");
7343
7344 out_unlock:
7345         spin_unlock_irqrestore(&priv->lock, flags);
7346         mutex_unlock(&priv->mutex);
7347
7348         return rc;
7349 }
7350
7351 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7352                            const u8 *local_addr, const u8 *addr,
7353                            struct ieee80211_key_conf *key)
7354 {
7355         struct iwl3945_priv *priv = hw->priv;
7356         int rc = 0;
7357         u8 sta_id;
7358
7359         IWL_DEBUG_MAC80211("enter\n");
7360
7361         if (!iwl3945_param_hwcrypto) {
7362                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7363                 return -EOPNOTSUPP;
7364         }
7365
7366         if (is_zero_ether_addr(addr))
7367                 /* only support pairwise keys */
7368                 return -EOPNOTSUPP;
7369
7370         sta_id = iwl3945_hw_find_station(priv, addr);
7371         if (sta_id == IWL_INVALID_STATION) {
7372                 DECLARE_MAC_BUF(mac);
7373
7374                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7375                                    print_mac(mac, addr));
7376                 return -EINVAL;
7377         }
7378
7379         mutex_lock(&priv->mutex);
7380
7381         iwl3945_scan_cancel_timeout(priv, 100);
7382
7383         switch (cmd) {
7384         case  SET_KEY:
7385                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7386                 if (!rc) {
7387                         iwl3945_set_rxon_hwcrypto(priv, 1);
7388                         iwl3945_commit_rxon(priv);
7389                         key->hw_key_idx = sta_id;
7390                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7391                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7392                 }
7393                 break;
7394         case DISABLE_KEY:
7395                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7396                 if (!rc) {
7397                         iwl3945_set_rxon_hwcrypto(priv, 0);
7398                         iwl3945_commit_rxon(priv);
7399                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7400                 }
7401                 break;
7402         default:
7403                 rc = -EINVAL;
7404         }
7405
7406         IWL_DEBUG_MAC80211("leave\n");
7407         mutex_unlock(&priv->mutex);
7408
7409         return rc;
7410 }
7411
7412 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7413                            const struct ieee80211_tx_queue_params *params)
7414 {
7415         struct iwl3945_priv *priv = hw->priv;
7416         unsigned long flags;
7417         int q;
7418
7419         IWL_DEBUG_MAC80211("enter\n");
7420
7421         if (!iwl3945_is_ready_rf(priv)) {
7422                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7423                 return -EIO;
7424         }
7425
7426         if (queue >= AC_NUM) {
7427                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7428                 return 0;
7429         }
7430
7431         if (!priv->qos_data.qos_enable) {
7432                 priv->qos_data.qos_active = 0;
7433                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7434                 return 0;
7435         }
7436         q = AC_NUM - 1 - queue;
7437
7438         spin_lock_irqsave(&priv->lock, flags);
7439
7440         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7441         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7442         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7443         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7444                         cpu_to_le16((params->txop * 32));
7445
7446         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7447         priv->qos_data.qos_active = 1;
7448
7449         spin_unlock_irqrestore(&priv->lock, flags);
7450
7451         mutex_lock(&priv->mutex);
7452         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7453                 iwl3945_activate_qos(priv, 1);
7454         else if (priv->assoc_id && iwl3945_is_associated(priv))
7455                 iwl3945_activate_qos(priv, 0);
7456
7457         mutex_unlock(&priv->mutex);
7458
7459         IWL_DEBUG_MAC80211("leave\n");
7460         return 0;
7461 }
7462
7463 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7464                                 struct ieee80211_tx_queue_stats *stats)
7465 {
7466         struct iwl3945_priv *priv = hw->priv;
7467         int i, avail;
7468         struct iwl3945_tx_queue *txq;
7469         struct iwl3945_queue *q;
7470         unsigned long flags;
7471
7472         IWL_DEBUG_MAC80211("enter\n");
7473
7474         if (!iwl3945_is_ready_rf(priv)) {
7475                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7476                 return -EIO;
7477         }
7478
7479         spin_lock_irqsave(&priv->lock, flags);
7480
7481         for (i = 0; i < AC_NUM; i++) {
7482                 txq = &priv->txq[i];
7483                 q = &txq->q;
7484                 avail = iwl3945_queue_space(q);
7485
7486                 stats->data[i].len = q->n_window - avail;
7487                 stats->data[i].limit = q->n_window - q->high_mark;
7488                 stats->data[i].count = q->n_window;
7489
7490         }
7491         spin_unlock_irqrestore(&priv->lock, flags);
7492
7493         IWL_DEBUG_MAC80211("leave\n");
7494
7495         return 0;
7496 }
7497
7498 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7499                              struct ieee80211_low_level_stats *stats)
7500 {
7501         IWL_DEBUG_MAC80211("enter\n");
7502         IWL_DEBUG_MAC80211("leave\n");
7503
7504         return 0;
7505 }
7506
7507 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7508 {
7509         IWL_DEBUG_MAC80211("enter\n");
7510         IWL_DEBUG_MAC80211("leave\n");
7511
7512         return 0;
7513 }
7514
7515 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7516 {
7517         struct iwl3945_priv *priv = hw->priv;
7518         unsigned long flags;
7519
7520         mutex_lock(&priv->mutex);
7521         IWL_DEBUG_MAC80211("enter\n");
7522
7523         iwl3945_reset_qos(priv);
7524
7525         cancel_delayed_work(&priv->post_associate);
7526
7527         spin_lock_irqsave(&priv->lock, flags);
7528         priv->assoc_id = 0;
7529         priv->assoc_capability = 0;
7530         priv->call_post_assoc_from_beacon = 0;
7531
7532         /* new association get rid of ibss beacon skb */
7533         if (priv->ibss_beacon)
7534                 dev_kfree_skb(priv->ibss_beacon);
7535
7536         priv->ibss_beacon = NULL;
7537
7538         priv->beacon_int = priv->hw->conf.beacon_int;
7539         priv->timestamp1 = 0;
7540         priv->timestamp0 = 0;
7541         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7542                 priv->beacon_int = 0;
7543
7544         spin_unlock_irqrestore(&priv->lock, flags);
7545
7546         if (!iwl3945_is_ready_rf(priv)) {
7547                 IWL_DEBUG_MAC80211("leave - not ready\n");
7548                 mutex_unlock(&priv->mutex);
7549                 return;
7550         }
7551
7552         /* we are restarting association process
7553          * clear RXON_FILTER_ASSOC_MSK bit
7554         */
7555         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7556                 iwl3945_scan_cancel_timeout(priv, 100);
7557                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7558                 iwl3945_commit_rxon(priv);
7559         }
7560
7561         /* Per mac80211.h: This is only used in IBSS mode... */
7562         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7563
7564                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7565                 mutex_unlock(&priv->mutex);
7566                 return;
7567         }
7568
7569         priv->only_active_channel = 0;
7570
7571         iwl3945_set_rate(priv);
7572
7573         mutex_unlock(&priv->mutex);
7574
7575         IWL_DEBUG_MAC80211("leave\n");
7576
7577 }
7578
7579 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7580                                  struct ieee80211_tx_control *control)
7581 {
7582         struct iwl3945_priv *priv = hw->priv;
7583         unsigned long flags;
7584
7585         mutex_lock(&priv->mutex);
7586         IWL_DEBUG_MAC80211("enter\n");
7587
7588         if (!iwl3945_is_ready_rf(priv)) {
7589                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7590                 mutex_unlock(&priv->mutex);
7591                 return -EIO;
7592         }
7593
7594         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7595                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7596                 mutex_unlock(&priv->mutex);
7597                 return -EIO;
7598         }
7599
7600         spin_lock_irqsave(&priv->lock, flags);
7601
7602         if (priv->ibss_beacon)
7603                 dev_kfree_skb(priv->ibss_beacon);
7604
7605         priv->ibss_beacon = skb;
7606
7607         priv->assoc_id = 0;
7608
7609         IWL_DEBUG_MAC80211("leave\n");
7610         spin_unlock_irqrestore(&priv->lock, flags);
7611
7612         iwl3945_reset_qos(priv);
7613
7614         queue_work(priv->workqueue, &priv->post_associate.work);
7615
7616         mutex_unlock(&priv->mutex);
7617
7618         return 0;
7619 }
7620
7621 /*****************************************************************************
7622  *
7623  * sysfs attributes
7624  *
7625  *****************************************************************************/
7626
7627 #ifdef CONFIG_IWL3945_DEBUG
7628
7629 /*
7630  * The following adds a new attribute to the sysfs representation
7631  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7632  * used for controlling the debug level.
7633  *
7634  * See the level definitions in iwl for details.
7635  */
7636
7637 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7638 {
7639         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7640 }
7641 static ssize_t store_debug_level(struct device_driver *d,
7642                                  const char *buf, size_t count)
7643 {
7644         char *p = (char *)buf;
7645         u32 val;
7646
7647         val = simple_strtoul(p, &p, 0);
7648         if (p == buf)
7649                 printk(KERN_INFO DRV_NAME
7650                        ": %s is not in hex or decimal form.\n", buf);
7651         else
7652                 iwl3945_debug_level = val;
7653
7654         return strnlen(buf, count);
7655 }
7656
7657 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7658                    show_debug_level, store_debug_level);
7659
7660 #endif /* CONFIG_IWL3945_DEBUG */
7661
7662 static ssize_t show_rf_kill(struct device *d,
7663                             struct device_attribute *attr, char *buf)
7664 {
7665         /*
7666          * 0 - RF kill not enabled
7667          * 1 - SW based RF kill active (sysfs)
7668          * 2 - HW based RF kill active
7669          * 3 - Both HW and SW based RF kill active
7670          */
7671         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7672         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7673                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7674
7675         return sprintf(buf, "%i\n", val);
7676 }
7677
7678 static ssize_t store_rf_kill(struct device *d,
7679                              struct device_attribute *attr,
7680                              const char *buf, size_t count)
7681 {
7682         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7683
7684         mutex_lock(&priv->mutex);
7685         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7686         mutex_unlock(&priv->mutex);
7687
7688         return count;
7689 }
7690
7691 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7692
7693 static ssize_t show_temperature(struct device *d,
7694                                 struct device_attribute *attr, char *buf)
7695 {
7696         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7697
7698         if (!iwl3945_is_alive(priv))
7699                 return -EAGAIN;
7700
7701         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7702 }
7703
7704 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7705
7706 static ssize_t show_rs_window(struct device *d,
7707                               struct device_attribute *attr,
7708                               char *buf)
7709 {
7710         struct iwl3945_priv *priv = d->driver_data;
7711         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7712 }
7713 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7714
7715 static ssize_t show_tx_power(struct device *d,
7716                              struct device_attribute *attr, char *buf)
7717 {
7718         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7719         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7720 }
7721
7722 static ssize_t store_tx_power(struct device *d,
7723                               struct device_attribute *attr,
7724                               const char *buf, size_t count)
7725 {
7726         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7727         char *p = (char *)buf;
7728         u32 val;
7729
7730         val = simple_strtoul(p, &p, 10);
7731         if (p == buf)
7732                 printk(KERN_INFO DRV_NAME
7733                        ": %s is not in decimal form.\n", buf);
7734         else
7735                 iwl3945_hw_reg_set_txpower(priv, val);
7736
7737         return count;
7738 }
7739
7740 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7741
7742 static ssize_t show_flags(struct device *d,
7743                           struct device_attribute *attr, char *buf)
7744 {
7745         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7746
7747         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7748 }
7749
7750 static ssize_t store_flags(struct device *d,
7751                            struct device_attribute *attr,
7752                            const char *buf, size_t count)
7753 {
7754         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7755         u32 flags = simple_strtoul(buf, NULL, 0);
7756
7757         mutex_lock(&priv->mutex);
7758         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7759                 /* Cancel any currently running scans... */
7760                 if (iwl3945_scan_cancel_timeout(priv, 100))
7761                         IWL_WARNING("Could not cancel scan.\n");
7762                 else {
7763                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7764                                        flags);
7765                         priv->staging_rxon.flags = cpu_to_le32(flags);
7766                         iwl3945_commit_rxon(priv);
7767                 }
7768         }
7769         mutex_unlock(&priv->mutex);
7770
7771         return count;
7772 }
7773
7774 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7775
7776 static ssize_t show_filter_flags(struct device *d,
7777                                  struct device_attribute *attr, char *buf)
7778 {
7779         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7780
7781         return sprintf(buf, "0x%04X\n",
7782                 le32_to_cpu(priv->active_rxon.filter_flags));
7783 }
7784
7785 static ssize_t store_filter_flags(struct device *d,
7786                                   struct device_attribute *attr,
7787                                   const char *buf, size_t count)
7788 {
7789         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7790         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7791
7792         mutex_lock(&priv->mutex);
7793         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7794                 /* Cancel any currently running scans... */
7795                 if (iwl3945_scan_cancel_timeout(priv, 100))
7796                         IWL_WARNING("Could not cancel scan.\n");
7797                 else {
7798                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7799                                        "0x%04X\n", filter_flags);
7800                         priv->staging_rxon.filter_flags =
7801                                 cpu_to_le32(filter_flags);
7802                         iwl3945_commit_rxon(priv);
7803                 }
7804         }
7805         mutex_unlock(&priv->mutex);
7806
7807         return count;
7808 }
7809
7810 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7811                    store_filter_flags);
7812
7813 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7814
7815 static ssize_t show_measurement(struct device *d,
7816                                 struct device_attribute *attr, char *buf)
7817 {
7818         struct iwl3945_priv *priv = dev_get_drvdata(d);
7819         struct iwl3945_spectrum_notification measure_report;
7820         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7821         u8 *data = (u8 *) & measure_report;
7822         unsigned long flags;
7823
7824         spin_lock_irqsave(&priv->lock, flags);
7825         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7826                 spin_unlock_irqrestore(&priv->lock, flags);
7827                 return 0;
7828         }
7829         memcpy(&measure_report, &priv->measure_report, size);
7830         priv->measurement_status = 0;
7831         spin_unlock_irqrestore(&priv->lock, flags);
7832
7833         while (size && (PAGE_SIZE - len)) {
7834                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7835                                    PAGE_SIZE - len, 1);
7836                 len = strlen(buf);
7837                 if (PAGE_SIZE - len)
7838                         buf[len++] = '\n';
7839
7840                 ofs += 16;
7841                 size -= min(size, 16U);
7842         }
7843
7844         return len;
7845 }
7846
7847 static ssize_t store_measurement(struct device *d,
7848                                  struct device_attribute *attr,
7849                                  const char *buf, size_t count)
7850 {
7851         struct iwl3945_priv *priv = dev_get_drvdata(d);
7852         struct ieee80211_measurement_params params = {
7853                 .channel = le16_to_cpu(priv->active_rxon.channel),
7854                 .start_time = cpu_to_le64(priv->last_tsf),
7855                 .duration = cpu_to_le16(1),
7856         };
7857         u8 type = IWL_MEASURE_BASIC;
7858         u8 buffer[32];
7859         u8 channel;
7860
7861         if (count) {
7862                 char *p = buffer;
7863                 strncpy(buffer, buf, min(sizeof(buffer), count));
7864                 channel = simple_strtoul(p, NULL, 0);
7865                 if (channel)
7866                         params.channel = channel;
7867
7868                 p = buffer;
7869                 while (*p && *p != ' ')
7870                         p++;
7871                 if (*p)
7872                         type = simple_strtoul(p + 1, NULL, 0);
7873         }
7874
7875         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7876                        "channel %d (for '%s')\n", type, params.channel, buf);
7877         iwl3945_get_measurement(priv, &params, type);
7878
7879         return count;
7880 }
7881
7882 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7883                    show_measurement, store_measurement);
7884 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7885
7886 static ssize_t show_rate(struct device *d,
7887                          struct device_attribute *attr, char *buf)
7888 {
7889         struct iwl3945_priv *priv = dev_get_drvdata(d);
7890         unsigned long flags;
7891         int i;
7892
7893         spin_lock_irqsave(&priv->sta_lock, flags);
7894         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7895                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7896         else
7897                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7898         spin_unlock_irqrestore(&priv->sta_lock, flags);
7899
7900         i = iwl3945_rate_index_from_plcp(i);
7901         if (i == -1)
7902                 return sprintf(buf, "0\n");
7903
7904         return sprintf(buf, "%d%s\n",
7905                        (iwl3945_rates[i].ieee >> 1),
7906                        (iwl3945_rates[i].ieee & 0x1) ? ".5" : "");
7907 }
7908
7909 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7910
7911 static ssize_t store_retry_rate(struct device *d,
7912                                 struct device_attribute *attr,
7913                                 const char *buf, size_t count)
7914 {
7915         struct iwl3945_priv *priv = dev_get_drvdata(d);
7916
7917         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7918         if (priv->retry_rate <= 0)
7919                 priv->retry_rate = 1;
7920
7921         return count;
7922 }
7923
7924 static ssize_t show_retry_rate(struct device *d,
7925                                struct device_attribute *attr, char *buf)
7926 {
7927         struct iwl3945_priv *priv = dev_get_drvdata(d);
7928         return sprintf(buf, "%d", priv->retry_rate);
7929 }
7930
7931 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7932                    store_retry_rate);
7933
7934 static ssize_t store_power_level(struct device *d,
7935                                  struct device_attribute *attr,
7936                                  const char *buf, size_t count)
7937 {
7938         struct iwl3945_priv *priv = dev_get_drvdata(d);
7939         int rc;
7940         int mode;
7941
7942         mode = simple_strtoul(buf, NULL, 0);
7943         mutex_lock(&priv->mutex);
7944
7945         if (!iwl3945_is_ready(priv)) {
7946                 rc = -EAGAIN;
7947                 goto out;
7948         }
7949
7950         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7951                 mode = IWL_POWER_AC;
7952         else
7953                 mode |= IWL_POWER_ENABLED;
7954
7955         if (mode != priv->power_mode) {
7956                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7957                 if (rc) {
7958                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7959                         goto out;
7960                 }
7961                 priv->power_mode = mode;
7962         }
7963
7964         rc = count;
7965
7966  out:
7967         mutex_unlock(&priv->mutex);
7968         return rc;
7969 }
7970
7971 #define MAX_WX_STRING 80
7972
7973 /* Values are in microsecond */
7974 static const s32 timeout_duration[] = {
7975         350000,
7976         250000,
7977         75000,
7978         37000,
7979         25000,
7980 };
7981 static const s32 period_duration[] = {
7982         400000,
7983         700000,
7984         1000000,
7985         1000000,
7986         1000000
7987 };
7988
7989 static ssize_t show_power_level(struct device *d,
7990                                 struct device_attribute *attr, char *buf)
7991 {
7992         struct iwl3945_priv *priv = dev_get_drvdata(d);
7993         int level = IWL_POWER_LEVEL(priv->power_mode);
7994         char *p = buf;
7995
7996         p += sprintf(p, "%d ", level);
7997         switch (level) {
7998         case IWL_POWER_MODE_CAM:
7999         case IWL_POWER_AC:
8000                 p += sprintf(p, "(AC)");
8001                 break;
8002         case IWL_POWER_BATTERY:
8003                 p += sprintf(p, "(BATTERY)");
8004                 break;
8005         default:
8006                 p += sprintf(p,
8007                              "(Timeout %dms, Period %dms)",
8008                              timeout_duration[level - 1] / 1000,
8009                              period_duration[level - 1] / 1000);
8010         }
8011
8012         if (!(priv->power_mode & IWL_POWER_ENABLED))
8013                 p += sprintf(p, " OFF\n");
8014         else
8015                 p += sprintf(p, " \n");
8016
8017         return (p - buf + 1);
8018
8019 }
8020
8021 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8022                    store_power_level);
8023
8024 static ssize_t show_channels(struct device *d,
8025                              struct device_attribute *attr, char *buf)
8026 {
8027         /* all this shit doesn't belong into sysfs anyway */
8028         return 0;
8029 }
8030
8031 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8032
8033 static ssize_t show_statistics(struct device *d,
8034                                struct device_attribute *attr, char *buf)
8035 {
8036         struct iwl3945_priv *priv = dev_get_drvdata(d);
8037         u32 size = sizeof(struct iwl3945_notif_statistics);
8038         u32 len = 0, ofs = 0;
8039         u8 *data = (u8 *) & priv->statistics;
8040         int rc = 0;
8041
8042         if (!iwl3945_is_alive(priv))
8043                 return -EAGAIN;
8044
8045         mutex_lock(&priv->mutex);
8046         rc = iwl3945_send_statistics_request(priv);
8047         mutex_unlock(&priv->mutex);
8048
8049         if (rc) {
8050                 len = sprintf(buf,
8051                               "Error sending statistics request: 0x%08X\n", rc);
8052                 return len;
8053         }
8054
8055         while (size && (PAGE_SIZE - len)) {
8056                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8057                                    PAGE_SIZE - len, 1);
8058                 len = strlen(buf);
8059                 if (PAGE_SIZE - len)
8060                         buf[len++] = '\n';
8061
8062                 ofs += 16;
8063                 size -= min(size, 16U);
8064         }
8065
8066         return len;
8067 }
8068
8069 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8070
8071 static ssize_t show_antenna(struct device *d,
8072                             struct device_attribute *attr, char *buf)
8073 {
8074         struct iwl3945_priv *priv = dev_get_drvdata(d);
8075
8076         if (!iwl3945_is_alive(priv))
8077                 return -EAGAIN;
8078
8079         return sprintf(buf, "%d\n", priv->antenna);
8080 }
8081
8082 static ssize_t store_antenna(struct device *d,
8083                              struct device_attribute *attr,
8084                              const char *buf, size_t count)
8085 {
8086         int ant;
8087         struct iwl3945_priv *priv = dev_get_drvdata(d);
8088
8089         if (count == 0)
8090                 return 0;
8091
8092         if (sscanf(buf, "%1i", &ant) != 1) {
8093                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8094                 return count;
8095         }
8096
8097         if ((ant >= 0) && (ant <= 2)) {
8098                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8099                 priv->antenna = (enum iwl3945_antenna)ant;
8100         } else
8101                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8102
8103
8104         return count;
8105 }
8106
8107 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8108
8109 static ssize_t show_status(struct device *d,
8110                            struct device_attribute *attr, char *buf)
8111 {
8112         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
8113         if (!iwl3945_is_alive(priv))
8114                 return -EAGAIN;
8115         return sprintf(buf, "0x%08x\n", (int)priv->status);
8116 }
8117
8118 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8119
8120 static ssize_t dump_error_log(struct device *d,
8121                               struct device_attribute *attr,
8122                               const char *buf, size_t count)
8123 {
8124         char *p = (char *)buf;
8125
8126         if (p[0] == '1')
8127                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
8128
8129         return strnlen(buf, count);
8130 }
8131
8132 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8133
8134 static ssize_t dump_event_log(struct device *d,
8135                               struct device_attribute *attr,
8136                               const char *buf, size_t count)
8137 {
8138         char *p = (char *)buf;
8139
8140         if (p[0] == '1')
8141                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
8142
8143         return strnlen(buf, count);
8144 }
8145
8146 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8147
8148 /*****************************************************************************
8149  *
8150  * driver setup and teardown
8151  *
8152  *****************************************************************************/
8153
8154 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
8155 {
8156         priv->workqueue = create_workqueue(DRV_NAME);
8157
8158         init_waitqueue_head(&priv->wait_command_queue);
8159
8160         INIT_WORK(&priv->up, iwl3945_bg_up);
8161         INIT_WORK(&priv->restart, iwl3945_bg_restart);
8162         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
8163         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
8164         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
8165         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
8166         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
8167         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
8168         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
8169         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
8170         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
8171         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
8172
8173         iwl3945_hw_setup_deferred_work(priv);
8174
8175         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8176                      iwl3945_irq_tasklet, (unsigned long)priv);
8177 }
8178
8179 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
8180 {
8181         iwl3945_hw_cancel_deferred_work(priv);
8182
8183         cancel_delayed_work_sync(&priv->init_alive_start);
8184         cancel_delayed_work(&priv->scan_check);
8185         cancel_delayed_work(&priv->alive_start);
8186         cancel_delayed_work(&priv->post_associate);
8187         cancel_work_sync(&priv->beacon_update);
8188 }
8189
8190 static struct attribute *iwl3945_sysfs_entries[] = {
8191         &dev_attr_antenna.attr,
8192         &dev_attr_channels.attr,
8193         &dev_attr_dump_errors.attr,
8194         &dev_attr_dump_events.attr,
8195         &dev_attr_flags.attr,
8196         &dev_attr_filter_flags.attr,
8197 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8198         &dev_attr_measurement.attr,
8199 #endif
8200         &dev_attr_power_level.attr,
8201         &dev_attr_rate.attr,
8202         &dev_attr_retry_rate.attr,
8203         &dev_attr_rf_kill.attr,
8204         &dev_attr_rs_window.attr,
8205         &dev_attr_statistics.attr,
8206         &dev_attr_status.attr,
8207         &dev_attr_temperature.attr,
8208         &dev_attr_tx_power.attr,
8209
8210         NULL
8211 };
8212
8213 static struct attribute_group iwl3945_attribute_group = {
8214         .name = NULL,           /* put in device directory */
8215         .attrs = iwl3945_sysfs_entries,
8216 };
8217
8218 static struct ieee80211_ops iwl3945_hw_ops = {
8219         .tx = iwl3945_mac_tx,
8220         .start = iwl3945_mac_start,
8221         .stop = iwl3945_mac_stop,
8222         .add_interface = iwl3945_mac_add_interface,
8223         .remove_interface = iwl3945_mac_remove_interface,
8224         .config = iwl3945_mac_config,
8225         .config_interface = iwl3945_mac_config_interface,
8226         .configure_filter = iwl3945_configure_filter,
8227         .set_key = iwl3945_mac_set_key,
8228         .get_stats = iwl3945_mac_get_stats,
8229         .get_tx_stats = iwl3945_mac_get_tx_stats,
8230         .conf_tx = iwl3945_mac_conf_tx,
8231         .get_tsf = iwl3945_mac_get_tsf,
8232         .reset_tsf = iwl3945_mac_reset_tsf,
8233         .beacon_update = iwl3945_mac_beacon_update,
8234         .hw_scan = iwl3945_mac_hw_scan
8235 };
8236
8237 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8238 {
8239         int err = 0;
8240         u32 pci_id;
8241         struct iwl3945_priv *priv;
8242         struct ieee80211_hw *hw;
8243         int i;
8244         DECLARE_MAC_BUF(mac);
8245
8246         /* Disabling hardware scan means that mac80211 will perform scans
8247          * "the hard way", rather than using device's scan. */
8248         if (iwl3945_param_disable_hw_scan) {
8249                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8250                 iwl3945_hw_ops.hw_scan = NULL;
8251         }
8252
8253         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8254             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8255                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8256                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8257                 err = -EINVAL;
8258                 goto out;
8259         }
8260
8261         /* mac80211 allocates memory for this device instance, including
8262          *   space for this driver's private structure */
8263         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8264         if (hw == NULL) {
8265                 IWL_ERROR("Can not allocate network device\n");
8266                 err = -ENOMEM;
8267                 goto out;
8268         }
8269         SET_IEEE80211_DEV(hw, &pdev->dev);
8270
8271         hw->rate_control_algorithm = "iwl-3945-rs";
8272
8273         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8274         priv = hw->priv;
8275         priv->hw = hw;
8276
8277         priv->pci_dev = pdev;
8278
8279         /* Select antenna (may be helpful if only one antenna is connected) */
8280         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8281 #ifdef CONFIG_IWL3945_DEBUG
8282         iwl3945_debug_level = iwl3945_param_debug;
8283         atomic_set(&priv->restrict_refcnt, 0);
8284 #endif
8285         priv->retry_rate = 1;
8286
8287         priv->ibss_beacon = NULL;
8288
8289         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8290          *   the range of signal quality values that we'll provide.
8291          * Negative values for level/noise indicate that we'll provide dBm.
8292          * For WE, at least, non-0 values here *enable* display of values
8293          *   in app (iwconfig). */
8294         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8295         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8296         hw->max_signal = 100;   /* link quality indication (%) */
8297
8298         /* Tell mac80211 our Tx characteristics */
8299         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8300
8301         /* 4 EDCA QOS priorities */
8302         hw->queues = 4;
8303
8304         spin_lock_init(&priv->lock);
8305         spin_lock_init(&priv->power_data.lock);
8306         spin_lock_init(&priv->sta_lock);
8307         spin_lock_init(&priv->hcmd_lock);
8308
8309         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8310                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8311
8312         INIT_LIST_HEAD(&priv->free_frames);
8313
8314         mutex_init(&priv->mutex);
8315         if (pci_enable_device(pdev)) {
8316                 err = -ENODEV;
8317                 goto out_ieee80211_free_hw;
8318         }
8319
8320         pci_set_master(pdev);
8321
8322         /* Clear the driver's (not device's) station table */
8323         iwl3945_clear_stations_table(priv);
8324
8325         priv->data_retry_limit = -1;
8326         priv->ieee_channels = NULL;
8327         priv->ieee_rates = NULL;
8328         priv->band = IEEE80211_BAND_2GHZ;
8329
8330         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8331         if (!err)
8332                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8333         if (err) {
8334                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8335                 goto out_pci_disable_device;
8336         }
8337
8338         pci_set_drvdata(pdev, priv);
8339         err = pci_request_regions(pdev, DRV_NAME);
8340         if (err)
8341                 goto out_pci_disable_device;
8342
8343         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8344          * PCI Tx retries from interfering with C3 CPU state */
8345         pci_write_config_byte(pdev, 0x41, 0x00);
8346
8347         priv->hw_base = pci_iomap(pdev, 0, 0);
8348         if (!priv->hw_base) {
8349                 err = -ENODEV;
8350                 goto out_pci_release_regions;
8351         }
8352
8353         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8354                         (unsigned long long) pci_resource_len(pdev, 0));
8355         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8356
8357         /* Initialize module parameter values here */
8358
8359         /* Disable radio (SW RF KILL) via parameter when loading driver */
8360         if (iwl3945_param_disable) {
8361                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8362                 IWL_DEBUG_INFO("Radio disabled.\n");
8363         }
8364
8365         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8366
8367         pci_id =
8368             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8369
8370         switch (pci_id) {
8371         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8372         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8373         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8374         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8375                 priv->is_abg = 0;
8376                 break;
8377
8378         /*
8379          * Rest are assumed ABG SKU -- if this is not the
8380          * case then the card will get the wrong 'Detected'
8381          * line in the kernel log however the code that
8382          * initializes the GEO table will detect no A-band
8383          * channels and remove the is_abg mask.
8384          */
8385         default:
8386                 priv->is_abg = 1;
8387                 break;
8388         }
8389
8390         printk(KERN_INFO DRV_NAME
8391                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8392                priv->is_abg ? "A" : "");
8393
8394         /* Device-specific setup */
8395         if (iwl3945_hw_set_hw_setting(priv)) {
8396                 IWL_ERROR("failed to set hw settings\n");
8397                 goto out_iounmap;
8398         }
8399
8400         if (iwl3945_param_qos_enable)
8401                 priv->qos_data.qos_enable = 1;
8402
8403         iwl3945_reset_qos(priv);
8404
8405         priv->qos_data.qos_active = 0;
8406         priv->qos_data.qos_cap.val = 0;
8407
8408         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8409         iwl3945_setup_deferred_work(priv);
8410         iwl3945_setup_rx_handlers(priv);
8411
8412         priv->rates_mask = IWL_RATES_MASK;
8413         /* If power management is turned on, default to AC mode */
8414         priv->power_mode = IWL_POWER_AC;
8415         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8416
8417         iwl3945_disable_interrupts(priv);
8418
8419         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8420         if (err) {
8421                 IWL_ERROR("failed to create sysfs device attributes\n");
8422                 goto out_release_irq;
8423         }
8424
8425         /* nic init */
8426         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8427                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8428
8429         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8430         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8431                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8432                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8433         if (err < 0) {
8434                 IWL_DEBUG_INFO("Failed to init the card\n");
8435                 goto out_remove_sysfs;
8436         }
8437         /* Read the EEPROM */
8438         err = iwl3945_eeprom_init(priv);
8439         if (err) {
8440                 IWL_ERROR("Unable to init EEPROM\n");
8441                 goto out_remove_sysfs;
8442         }
8443         /* MAC Address location in EEPROM same for 3945/4965 */
8444         get_eeprom_mac(priv, priv->mac_addr);
8445         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8446         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8447
8448         err = iwl3945_init_channel_map(priv);
8449         if (err) {
8450                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8451                 goto out_remove_sysfs;
8452         }
8453
8454         err = iwl3945_init_geos(priv);
8455         if (err) {
8456                 IWL_ERROR("initializing geos failed: %d\n", err);
8457                 goto out_free_channel_map;
8458         }
8459
8460         iwl3945_rate_control_register(priv->hw);
8461         err = ieee80211_register_hw(priv->hw);
8462         if (err) {
8463                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8464                 goto out_free_geos;
8465         }
8466
8467         priv->hw->conf.beacon_int = 100;
8468         priv->mac80211_registered = 1;
8469         pci_save_state(pdev);
8470         pci_disable_device(pdev);
8471
8472         return 0;
8473
8474  out_free_geos:
8475         iwl3945_free_geos(priv);
8476  out_free_channel_map:
8477         iwl3945_free_channel_map(priv);
8478  out_remove_sysfs:
8479         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8480
8481  out_release_irq:
8482         destroy_workqueue(priv->workqueue);
8483         priv->workqueue = NULL;
8484         iwl3945_unset_hw_setting(priv);
8485
8486  out_iounmap:
8487         pci_iounmap(pdev, priv->hw_base);
8488  out_pci_release_regions:
8489         pci_release_regions(pdev);
8490  out_pci_disable_device:
8491         pci_disable_device(pdev);
8492         pci_set_drvdata(pdev, NULL);
8493  out_ieee80211_free_hw:
8494         ieee80211_free_hw(priv->hw);
8495  out:
8496         return err;
8497 }
8498
8499 static void iwl3945_pci_remove(struct pci_dev *pdev)
8500 {
8501         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8502         struct list_head *p, *q;
8503         int i;
8504
8505         if (!priv)
8506                 return;
8507
8508         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8509
8510         set_bit(STATUS_EXIT_PENDING, &priv->status);
8511
8512         iwl3945_down(priv);
8513
8514         /* Free MAC hash list for ADHOC */
8515         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8516                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8517                         list_del(p);
8518                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8519                 }
8520         }
8521
8522         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8523
8524         iwl3945_dealloc_ucode_pci(priv);
8525
8526         if (priv->rxq.bd)
8527                 iwl3945_rx_queue_free(priv, &priv->rxq);
8528         iwl3945_hw_txq_ctx_free(priv);
8529
8530         iwl3945_unset_hw_setting(priv);
8531         iwl3945_clear_stations_table(priv);
8532
8533         if (priv->mac80211_registered) {
8534                 ieee80211_unregister_hw(priv->hw);
8535                 iwl3945_rate_control_unregister(priv->hw);
8536         }
8537
8538         /*netif_stop_queue(dev); */
8539         flush_workqueue(priv->workqueue);
8540
8541         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8542          * priv->workqueue... so we can't take down the workqueue
8543          * until now... */
8544         destroy_workqueue(priv->workqueue);
8545         priv->workqueue = NULL;
8546
8547         pci_iounmap(pdev, priv->hw_base);
8548         pci_release_regions(pdev);
8549         pci_disable_device(pdev);
8550         pci_set_drvdata(pdev, NULL);
8551
8552         iwl3945_free_channel_map(priv);
8553         iwl3945_free_geos(priv);
8554
8555         if (priv->ibss_beacon)
8556                 dev_kfree_skb(priv->ibss_beacon);
8557
8558         ieee80211_free_hw(priv->hw);
8559 }
8560
8561 #ifdef CONFIG_PM
8562
8563 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8564 {
8565         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8566
8567         if (priv->is_open) {
8568                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8569                 iwl3945_mac_stop(priv->hw);
8570                 priv->is_open = 1;
8571         }
8572
8573         pci_set_power_state(pdev, PCI_D3hot);
8574
8575         return 0;
8576 }
8577
8578 static int iwl3945_pci_resume(struct pci_dev *pdev)
8579 {
8580         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8581
8582         pci_set_power_state(pdev, PCI_D0);
8583
8584         if (priv->is_open)
8585                 iwl3945_mac_start(priv->hw);
8586
8587         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8588         return 0;
8589 }
8590
8591 #endif /* CONFIG_PM */
8592
8593 /*****************************************************************************
8594  *
8595  * driver and module entry point
8596  *
8597  *****************************************************************************/
8598
8599 static struct pci_driver iwl3945_driver = {
8600         .name = DRV_NAME,
8601         .id_table = iwl3945_hw_card_ids,
8602         .probe = iwl3945_pci_probe,
8603         .remove = __devexit_p(iwl3945_pci_remove),
8604 #ifdef CONFIG_PM
8605         .suspend = iwl3945_pci_suspend,
8606         .resume = iwl3945_pci_resume,
8607 #endif
8608 };
8609
8610 static int __init iwl3945_init(void)
8611 {
8612
8613         int ret;
8614         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8615         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8616         ret = pci_register_driver(&iwl3945_driver);
8617         if (ret) {
8618                 IWL_ERROR("Unable to initialize PCI module\n");
8619                 return ret;
8620         }
8621 #ifdef CONFIG_IWL3945_DEBUG
8622         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8623         if (ret) {
8624                 IWL_ERROR("Unable to create driver sysfs file\n");
8625                 pci_unregister_driver(&iwl3945_driver);
8626                 return ret;
8627         }
8628 #endif
8629
8630         return ret;
8631 }
8632
8633 static void __exit iwl3945_exit(void)
8634 {
8635 #ifdef CONFIG_IWL3945_DEBUG
8636         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8637 #endif
8638         pci_unregister_driver(&iwl3945_driver);
8639 }
8640
8641 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8642 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8643 module_param_named(disable, iwl3945_param_disable, int, 0444);
8644 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8645 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8646 MODULE_PARM_DESC(hwcrypto,
8647                  "using hardware crypto engine (default 0 [software])\n");
8648 module_param_named(debug, iwl3945_param_debug, int, 0444);
8649 MODULE_PARM_DESC(debug, "debug output mask");
8650 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8651 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8652
8653 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8654 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8655
8656 /* QoS */
8657 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8658 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8659
8660 module_exit(iwl3945_exit);
8661 module_init(iwl3945_init);