drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "wl1251_reg.h"
  35 #include "wl1251_io.h"
  36 #include "wl1251_cmd.h"
  37 #include "wl1251_event.h"
  38 #include "wl1251_tx.h"
  39 #include "wl1251_rx.h"
  40 #include "wl1251_ps.h"
  41 #include "wl1251_init.h"
  42 #include "wl1251_debugfs.h"
  43 #include "wl1251_boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static void wl1251_power_off(struct wl1251 *wl)
  56 {
  57         wl->set_power(false);
  58 }
  59
  60 static void wl1251_power_on(struct wl1251 *wl)
  61 {
  62         wl->set_power(true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         memcpy(wl->nvs, fw->data, wl->nvs_len);
 134
 135         ret = 0;
 136
 137 out:
 138         release_firmware(fw);
 139
 140         return ret;
 141 }
 142
 143 static void wl1251_fw_wakeup(struct wl1251 *wl)
 144 {
 145         u32 elp_reg;
 146
 147         elp_reg = ELPCTRL_WAKE_UP;
 148         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 149         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 150
 151         if (!(elp_reg & ELPCTRL_WLAN_READY))
 152                 wl1251_warning("WLAN not ready");
 153 }
 154
 155 static int wl1251_chip_wakeup(struct wl1251 *wl)
 156 {
 157         int ret = 0;
 158
 159         wl1251_power_on(wl);
 160         msleep(WL1251_POWER_ON_SLEEP);
 161         wl->if_ops->reset(wl);
 162
 163         /* We don't need a real memory partition here, because we only want
 164          * to use the registers at this point. */
 165         wl1251_set_partition(wl,
 166                              0x00000000,
 167                              0x00000000,
 168                              REGISTERS_BASE,
 169                              REGISTERS_DOWN_SIZE);
 170
 171         /* ELP module wake up */
 172         wl1251_fw_wakeup(wl);
 173
 174         /* whal_FwCtrl_BootSm() */
 175
 176         /* 0. read chip id from CHIP_ID */
 177         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 178
 179         /* 1. check if chip id is valid */
 180
 181         switch (wl->chip_id) {
 182         case CHIP_ID_1251_PG12:
 183                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 184                              wl->chip_id);
 185                 break;
 186         case CHIP_ID_1251_PG11:
 187                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 188                              wl->chip_id);
 189                 break;
 190         case CHIP_ID_1251_PG10:
 191         default:
 192                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 193                 ret = -ENODEV;
 194                 goto out;
 195         }
 196
 197         if (wl->fw == NULL) {
 198                 ret = wl1251_fetch_firmware(wl);
 199                 if (ret < 0)
 200                         goto out;
 201         }
 202
 203         /* No NVS from netlink, try to get it from the filesystem */
 204         if (wl->nvs == NULL) {
 205                 ret = wl1251_fetch_nvs(wl);
 206                 if (ret < 0)
 207                         goto out;
 208         }
 209
 210 out:
 211         return ret;
 212 }
 213
 214 static void wl1251_irq_work(struct work_struct *work)
 215 {
 216         u32 intr;
 217         struct wl1251 *wl =
 218                 container_of(work, struct wl1251, irq_work);
 219         int ret;
 220
 221         mutex_lock(&wl->mutex);
 222
 223         wl1251_debug(DEBUG_IRQ, "IRQ work");
 224
 225         if (wl->state == WL1251_STATE_OFF)
 226                 goto out;
 227
 228         ret = wl1251_ps_elp_wakeup(wl);
 229         if (ret < 0)
 230                 goto out;
 231
 232         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 233
 234         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 235         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 236
 237         if (wl->data_path) {
 238                 wl->rx_counter =
 239                         wl1251_mem_read32(wl, wl->data_path->rx_control_addr);
 240
 241                 /* We handle a frmware bug here */
 242                 switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 243                 case 0:
 244                         wl1251_debug(DEBUG_IRQ, "RX: FW and host in sync");
 245                         intr &= ~WL1251_ACX_INTR_RX0_DATA;
 246                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
 247                         break;
 248                 case 1:
 249                         wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 250                         intr |= WL1251_ACX_INTR_RX0_DATA;
 251                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                         break;
 253                 case 2:
 254                         wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 255                         intr |= WL1251_ACX_INTR_RX0_DATA;
 256                         intr |= WL1251_ACX_INTR_RX1_DATA;
 257                         break;
 258                 default:
 259                         wl1251_warning("RX: FW and host out of sync: %d",
 260                                        wl->rx_counter - wl->rx_handled);
 261                         break;
 262                 }
 263
 264                 wl->rx_handled = wl->rx_counter;
 265
 266
 267                 wl1251_debug(DEBUG_IRQ, "RX counter: %d", wl->rx_counter);
 268         }
 269
 270         intr &= wl->intr_mask;
 271
 272         if (intr == 0) {
 273                 wl1251_debug(DEBUG_IRQ, "INTR is 0");
 274                 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
 275                                    ~(wl->intr_mask));
 276
 277                 goto out_sleep;
 278         }
 279
 280         if (intr & WL1251_ACX_INTR_RX0_DATA) {
 281                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 282                 wl1251_rx(wl);
 283         }
 284
 285         if (intr & WL1251_ACX_INTR_RX1_DATA) {
 286                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 287                 wl1251_rx(wl);
 288         }
 289
 290         if (intr & WL1251_ACX_INTR_TX_RESULT) {
 291                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 292                 wl1251_tx_complete(wl);
 293         }
 294
 295         if (intr & (WL1251_ACX_INTR_EVENT_A | WL1251_ACX_INTR_EVENT_B)) {
 296                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)", intr);
 297                 if (intr & WL1251_ACX_INTR_EVENT_A)
 298                         wl1251_event_handle(wl, 0);
 299                 else
 300                         wl1251_event_handle(wl, 1);
 301         }
 302
 303         if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 304                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_INIT_COMPLETE");
 305
 306         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 307
 308 out_sleep:
 309         wl1251_ps_elp_sleep(wl);
 310
 311 out:
 312         mutex_unlock(&wl->mutex);
 313 }
 314
 315 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 316                        u16 beacon_interval, u8 dtim_period)
 317 {
 318         int ret;
 319
 320         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 321                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 322                                      wl->tx_mgmt_frm_rate,
 323                                      wl->tx_mgmt_frm_mod);
 324         if (ret < 0)
 325                 goto out;
 326
 327
 328         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 329                               dtim_period);
 330         if (ret < 0)
 331                 goto out;
 332
 333         /*
 334          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 335          * locking we just sleep instead, for now
 336          */
 337         msleep(10);
 338
 339 out:
 340         return ret;
 341 }
 342
 343 static void wl1251_filter_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, filter_work);
 347         int ret;
 348
 349         mutex_lock(&wl->mutex);
 350
 351         if (wl->state == WL1251_STATE_OFF)
 352                 goto out;
 353
 354         ret = wl1251_ps_elp_wakeup(wl);
 355         if (ret < 0)
 356                 goto out;
 357
 358         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 359                           wl->dtim_period);
 360         if (ret < 0)
 361                 goto out_sleep;
 362
 363 out_sleep:
 364         wl1251_ps_elp_sleep(wl);
 365
 366 out:
 367         mutex_unlock(&wl->mutex);
 368 }
 369
 370 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 371 {
 372         struct wl1251 *wl = hw->priv;
 373
 374         skb_queue_tail(&wl->tx_queue, skb);
 375
 376         /*
 377          * The chip specific setup must run before the first TX packet -
 378          * before that, the tx_work will not be initialized!
 379          */
 380
 381         ieee80211_queue_work(wl->hw, &wl->tx_work);
 382
 383         /*
 384          * The workqueue is slow to process the tx_queue and we need stop
 385          * the queue here, otherwise the queue will get too long.
 386          */
 387         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 388                 ieee80211_stop_queues(wl->hw);
 389
 390                 /*
 391                  * FIXME: this is racy, the variable is not properly
 392                  * protected. Maybe fix this by removing the stupid
 393                  * variable altogether and checking the real queue state?
 394                  */
 395                 wl->tx_queue_stopped = true;
 396         }
 397
 398         return NETDEV_TX_OK;
 399 }
 400
 401 static int wl1251_op_start(struct ieee80211_hw *hw)
 402 {
 403         struct wl1251 *wl = hw->priv;
 404         int ret = 0;
 405
 406         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 407
 408         mutex_lock(&wl->mutex);
 409
 410         if (wl->state != WL1251_STATE_OFF) {
 411                 wl1251_error("cannot start because not in off state: %d",
 412                              wl->state);
 413                 ret = -EBUSY;
 414                 goto out;
 415         }
 416
 417         ret = wl1251_chip_wakeup(wl);
 418         if (ret < 0)
 419                 goto out;
 420
 421         ret = wl1251_boot(wl);
 422         if (ret < 0)
 423                 goto out;
 424
 425         ret = wl1251_hw_init(wl);
 426         if (ret < 0)
 427                 goto out;
 428
 429         ret = wl1251_acx_station_id(wl);
 430         if (ret < 0)
 431                 goto out;
 432
 433         wl->state = WL1251_STATE_ON;
 434
 435         wl1251_info("firmware booted (%s)", wl->fw_ver);
 436
 437 out:
 438         if (ret < 0)
 439                 wl1251_power_off(wl);
 440
 441         mutex_unlock(&wl->mutex);
 442
 443         return ret;
 444 }
 445
 446 static void wl1251_op_stop(struct ieee80211_hw *hw)
 447 {
 448         struct wl1251 *wl = hw->priv;
 449
 450         wl1251_info("down");
 451
 452         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 453
 454         mutex_lock(&wl->mutex);
 455
 456         WARN_ON(wl->state != WL1251_STATE_ON);
 457
 458         if (wl->scanning) {
 459                 mutex_unlock(&wl->mutex);
 460                 ieee80211_scan_completed(wl->hw, true);
 461                 mutex_lock(&wl->mutex);
 462                 wl->scanning = false;
 463         }
 464
 465         wl->state = WL1251_STATE_OFF;
 466
 467         wl1251_disable_interrupts(wl);
 468
 469         mutex_unlock(&wl->mutex);
 470
 471         cancel_work_sync(&wl->irq_work);
 472         cancel_work_sync(&wl->tx_work);
 473         cancel_work_sync(&wl->filter_work);
 474
 475         mutex_lock(&wl->mutex);
 476
 477         /* let's notify MAC80211 about the remaining pending TX frames */
 478         wl1251_tx_flush(wl);
 479         wl1251_power_off(wl);
 480
 481         memset(wl->bssid, 0, ETH_ALEN);
 482         wl->listen_int = 1;
 483         wl->bss_type = MAX_BSS_TYPE;
 484
 485         wl->data_in_count = 0;
 486         wl->rx_counter = 0;
 487         wl->rx_handled = 0;
 488         wl->rx_current_buffer = 0;
 489         wl->rx_last_id = 0;
 490         wl->next_tx_complete = 0;
 491         wl->elp = false;
 492         wl->psm = 0;
 493         wl->tx_queue_stopped = false;
 494         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 495         wl->channel = WL1251_DEFAULT_CHANNEL;
 496
 497         wl1251_debugfs_reset(wl);
 498
 499         mutex_unlock(&wl->mutex);
 500 }
 501
 502 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 503                                    struct ieee80211_if_init_conf *conf)
 504 {
 505         struct wl1251 *wl = hw->priv;
 506         int ret = 0;
 507
 508         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 509                      conf->type, conf->mac_addr);
 510
 511         mutex_lock(&wl->mutex);
 512
 513         switch (conf->type) {
 514         case NL80211_IFTYPE_STATION:
 515                 wl->bss_type = BSS_TYPE_STA_BSS;
 516                 break;
 517         case NL80211_IFTYPE_ADHOC:
 518                 wl->bss_type = BSS_TYPE_IBSS;
 519                 break;
 520         default:
 521                 ret = -EOPNOTSUPP;
 522                 goto out;
 523         }
 524
 525         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 526                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 527                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 528                 ret = wl1251_acx_station_id(wl);
 529                 if (ret < 0)
 530                         goto out;
 531         }
 532
 533 out:
 534         mutex_unlock(&wl->mutex);
 535         return ret;
 536 }
 537
 538 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 539                                          struct ieee80211_if_init_conf *conf)
 540 {
 541         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 542 }
 543
 544 static int wl1251_build_null_data(struct wl1251 *wl)
 545 {
 546         struct wl12xx_null_data_template template;
 547
 548         if (!is_zero_ether_addr(wl->bssid)) {
 549                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 550                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 551         } else {
 552                 memset(template.header.da, 0xff, ETH_ALEN);
 553                 memset(template.header.bssid, 0xff, ETH_ALEN);
 554         }
 555
 556         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 557         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 558                                                 IEEE80211_STYPE_NULLFUNC);
 559
 560         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
 561                                        sizeof(template));
 562
 563 }
 564
 565 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
 566 {
 567         struct wl12xx_ps_poll_template template;
 568
 569         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 570         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 571         template.aid = aid;
 572         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 573
 574         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
 575                                        sizeof(template));
 576
 577 }
 578
 579 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 580 {
 581         struct wl1251 *wl = hw->priv;
 582         struct ieee80211_conf *conf = &hw->conf;
 583         int channel, ret = 0;
 584
 585         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 586
 587         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 588                      channel,
 589                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 590                      conf->power_level);
 591
 592         mutex_lock(&wl->mutex);
 593
 594         ret = wl1251_ps_elp_wakeup(wl);
 595         if (ret < 0)
 596                 goto out;
 597
 598         if (channel != wl->channel) {
 599                 wl->channel = channel;
 600
 601                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 602                                   wl->beacon_int, wl->dtim_period);
 603                 if (ret < 0)
 604                         goto out_sleep;
 605         }
 606
 607         ret = wl1251_build_null_data(wl);
 608         if (ret < 0)
 609                 goto out_sleep;
 610
 611         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 612                 wl1251_debug(DEBUG_PSM, "psm enabled");
 613
 614                 wl->psm_requested = true;
 615
 616                 /*
 617                  * We enter PSM only if we're already associated.
 618                  * If we're not, we'll enter it when joining an SSID,
 619                  * through the bss_info_changed() hook.
 620                  */
 621                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 622         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 623                    wl->psm_requested) {
 624                 wl1251_debug(DEBUG_PSM, "psm disabled");
 625
 626                 wl->psm_requested = false;
 627
 628                 if (wl->psm)
 629                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 630         }
 631
 632         if (conf->power_level != wl->power_level) {
 633                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 634                 if (ret < 0)
 635                         goto out;
 636
 637                 wl->power_level = conf->power_level;
 638         }
 639
 640 out_sleep:
 641         wl1251_ps_elp_sleep(wl);
 642
 643 out:
 644         mutex_unlock(&wl->mutex);
 645
 646         return ret;
 647 }
 648
 649 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 650                                   FIF_ALLMULTI | \
 651                                   FIF_FCSFAIL | \
 652                                   FIF_BCN_PRBRESP_PROMISC | \
 653                                   FIF_CONTROL | \
 654                                   FIF_OTHER_BSS)
 655
 656 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 657                                        unsigned int changed,
 658                                        unsigned int *total,u64 multicast)
 659 {
 660         struct wl1251 *wl = hw->priv;
 661
 662         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 663
 664         *total &= WL1251_SUPPORTED_FILTERS;
 665         changed &= WL1251_SUPPORTED_FILTERS;
 666
 667         if (changed == 0)
 668                 /* no filters which we support changed */
 669                 return;
 670
 671         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 672
 673         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 674         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 675
 676         if (*total & FIF_PROMISC_IN_BSS) {
 677                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 678                 wl->rx_config |= CFG_RX_ALL_GOOD;
 679         }
 680         if (*total & FIF_ALLMULTI)
 681                 /*
 682                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 683                  * all multicast frames
 684                  */
 685                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 686         if (*total & FIF_FCSFAIL)
 687                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 688         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 689                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 690                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 691         }
 692         if (*total & FIF_CONTROL)
 693                 wl->rx_filter |= CFG_RX_CTL_EN;
 694         if (*total & FIF_OTHER_BSS)
 695                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 696
 697         /*
 698          * FIXME: workqueues need to be properly cancelled on stop(), for
 699          * now let's just disable changing the filter settings. They will
 700          * be updated any on config().
 701          */
 702         /* schedule_work(&wl->filter_work); */
 703 }
 704
 705 /* HW encryption */
 706 static int wl1251_set_key_type(struct wl1251 *wl,
 707                                struct wl1251_cmd_set_keys *key,
 708                                enum set_key_cmd cmd,
 709                                struct ieee80211_key_conf *mac80211_key,
 710                                const u8 *addr)
 711 {
 712         switch (mac80211_key->alg) {
 713         case ALG_WEP:
 714                 if (is_broadcast_ether_addr(addr))
 715                         key->key_type = KEY_WEP_DEFAULT;
 716                 else
 717                         key->key_type = KEY_WEP_ADDR;
 718
 719                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 720                 break;
 721         case ALG_TKIP:
 722                 if (is_broadcast_ether_addr(addr))
 723                         key->key_type = KEY_TKIP_MIC_GROUP;
 724                 else
 725                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 726
 727                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 728                 break;
 729         case ALG_CCMP:
 730                 if (is_broadcast_ether_addr(addr))
 731                         key->key_type = KEY_AES_GROUP;
 732                 else
 733                         key->key_type = KEY_AES_PAIRWISE;
 734                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 735                 break;
 736         default:
 737                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 738                 return -EOPNOTSUPP;
 739         }
 740
 741         return 0;
 742 }
 743
 744 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 745                              struct ieee80211_vif *vif,
 746                              struct ieee80211_sta *sta,
 747                              struct ieee80211_key_conf *key)
 748 {
 749         struct wl1251 *wl = hw->priv;
 750         struct wl1251_cmd_set_keys *wl_cmd;
 751         const u8 *addr;
 752         int ret;
 753
 754         static const u8 bcast_addr[ETH_ALEN] =
 755                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 756
 757         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 758
 759         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 760         if (!wl_cmd) {
 761                 ret = -ENOMEM;
 762                 goto out;
 763         }
 764
 765         addr = sta ? sta->addr : bcast_addr;
 766
 767         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 768         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 769         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 770                      key->alg, key->keyidx, key->keylen, key->flags);
 771         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 772
 773         if (is_zero_ether_addr(addr)) {
 774                 /* We dont support TX only encryption */
 775                 ret = -EOPNOTSUPP;
 776                 goto out;
 777         }
 778
 779         mutex_lock(&wl->mutex);
 780
 781         ret = wl1251_ps_elp_wakeup(wl);
 782         if (ret < 0)
 783                 goto out_unlock;
 784
 785         switch (cmd) {
 786         case SET_KEY:
 787                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 788                 break;
 789         case DISABLE_KEY:
 790                 wl_cmd->key_action = KEY_REMOVE;
 791                 break;
 792         default:
 793                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 794                 break;
 795         }
 796
 797         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 798         if (ret < 0) {
 799                 wl1251_error("Set KEY type failed");
 800                 goto out_sleep;
 801         }
 802
 803         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 804                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 805
 806         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 807             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 808                 /*
 809                  * We get the key in the following form:
 810                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 811                  * but the target is expecting:
 812                  * TKIP - RX MIC - TX MIC
 813                  */
 814                 memcpy(wl_cmd->key, key->key, 16);
 815                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 816                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 817
 818         } else {
 819                 memcpy(wl_cmd->key, key->key, key->keylen);
 820         }
 821         wl_cmd->key_size = key->keylen;
 822
 823         wl_cmd->id = key->keyidx;
 824         wl_cmd->ssid_profile = 0;
 825
 826         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 827
 828         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 829         if (ret < 0) {
 830                 wl1251_warning("could not set keys");
 831                 goto out_sleep;
 832         }
 833
 834 out_sleep:
 835         wl1251_ps_elp_sleep(wl);
 836
 837 out_unlock:
 838         mutex_unlock(&wl->mutex);
 839
 840 out:
 841         kfree(wl_cmd);
 842
 843         return ret;
 844 }
 845
 846 static int wl1251_build_basic_rates(char *rates)
 847 {
 848         u8 index = 0;
 849
 850         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 851         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 852         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 853         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 854
 855         return index;
 856 }
 857
 858 static int wl1251_build_extended_rates(char *rates)
 859 {
 860         u8 index = 0;
 861
 862         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 863         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 864         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 865         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 866         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 867         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 868         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 869         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 870
 871         return index;
 872 }
 873
 874
 875 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 876 {
 877         struct wl12xx_probe_req_template template;
 878         struct wl12xx_ie_rates *rates;
 879         char *ptr;
 880         u16 size;
 881
 882         ptr = (char *)&template;
 883         size = sizeof(struct ieee80211_header);
 884
 885         memset(template.header.da, 0xff, ETH_ALEN);
 886         memset(template.header.bssid, 0xff, ETH_ALEN);
 887         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 888         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 889
 890         /* IEs */
 891         /* SSID */
 892         template.ssid.header.id = WLAN_EID_SSID;
 893         template.ssid.header.len = ssid_len;
 894         if (ssid_len && ssid)
 895                 memcpy(template.ssid.ssid, ssid, ssid_len);
 896         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 897         ptr += size;
 898
 899         /* Basic Rates */
 900         rates = (struct wl12xx_ie_rates *)ptr;
 901         rates->header.id = WLAN_EID_SUPP_RATES;
 902         rates->header.len = wl1251_build_basic_rates(rates->rates);
 903         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 904         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 905
 906         /* Extended rates */
 907         rates = (struct wl12xx_ie_rates *)ptr;
 908         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 909         rates->header.len = wl1251_build_extended_rates(rates->rates);
 910         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 911
 912         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 913
 914         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 915                                       size);
 916 }
 917
 918 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
 919                           u8 active_scan, u8 high_prio, u8 num_channels,
 920                           u8 probe_requests)
 921 {
 922         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
 923         struct cmd_scan *params = NULL;
 924         int i, ret;
 925         u16 scan_options = 0;
 926
 927         if (wl->scanning)
 928                 return -EINVAL;
 929
 930         params = kzalloc(sizeof(*params), GFP_KERNEL);
 931         if (!params)
 932                 return -ENOMEM;
 933
 934         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 935         params->params.rx_filter_options =
 936                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 937
 938         /* High priority scan */
 939         if (!active_scan)
 940                 scan_options |= SCAN_PASSIVE;
 941         if (high_prio)
 942                 scan_options |= SCAN_PRIORITY_HIGH;
 943         params->params.scan_options = scan_options;
 944
 945         params->params.num_channels = num_channels;
 946         params->params.num_probe_requests = probe_requests;
 947         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 948         params->params.tid_trigger = 0;
 949
 950         for (i = 0; i < num_channels; i++) {
 951                 params->channels[i].min_duration = cpu_to_le32(30000);
 952                 params->channels[i].max_duration = cpu_to_le32(60000);
 953                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 954                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 955                 params->channels[i].early_termination = 0;
 956                 params->channels[i].tx_power_att = 0;
 957                 params->channels[i].channel = i + 1;
 958                 memset(params->channels[i].pad, 0, 3);
 959         }
 960
 961         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 962                 memset(&params->channels[i], 0,
 963                        sizeof(struct basic_scan_channel_parameters));
 964
 965         if (len && ssid) {
 966                 params->params.ssid_len = len;
 967                 memcpy(params->params.ssid, ssid, len);
 968         } else {
 969                 params->params.ssid_len = 0;
 970                 memset(params->params.ssid, 0, 32);
 971         }
 972
 973         ret = wl1251_build_probe_req(wl, ssid, len);
 974         if (ret < 0) {
 975                 wl1251_error("PROBE request template failed");
 976                 goto out;
 977         }
 978
 979         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 980         if (!trigger)
 981                 goto out;
 982
 983         trigger->timeout = 0;
 984
 985         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 986                               sizeof(*trigger));
 987         if (ret < 0) {
 988                 wl1251_error("trigger scan to failed for hw scan");
 989                 goto out;
 990         }
 991
 992         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 993
 994         wl->scanning = true;
 995
 996         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 997         if (ret < 0)
 998                 wl1251_error("SCAN failed");
 999
1000         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1001
1002         if (params->header.status != CMD_STATUS_SUCCESS) {
1003                 wl1251_error("TEST command answer error: %d",
1004                              params->header.status);
1005                 wl->scanning = false;
1006                 ret = -EIO;
1007                 goto out;
1008         }
1009
1010 out:
1011         kfree(params);
1012         return ret;
1013
1014 }
1015
1016 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1017                              struct cfg80211_scan_request *req)
1018 {
1019         struct wl1251 *wl = hw->priv;
1020         int ret;
1021         u8 *ssid = NULL;
1022         size_t ssid_len = 0;
1023
1024         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1025
1026         if (req->n_ssids) {
1027                 ssid = req->ssids[0].ssid;
1028                 ssid_len = req->ssids[0].ssid_len;
1029         }
1030
1031         mutex_lock(&wl->mutex);
1032
1033         ret = wl1251_ps_elp_wakeup(wl);
1034         if (ret < 0)
1035                 goto out;
1036
1037         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1038
1039         wl1251_ps_elp_sleep(wl);
1040
1041 out:
1042         mutex_unlock(&wl->mutex);
1043
1044         return ret;
1045 }
1046
1047 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1048 {
1049         struct wl1251 *wl = hw->priv;
1050         int ret;
1051
1052         mutex_lock(&wl->mutex);
1053
1054         ret = wl1251_ps_elp_wakeup(wl);
1055         if (ret < 0)
1056                 goto out;
1057
1058         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1059         if (ret < 0)
1060                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1061
1062         wl1251_ps_elp_sleep(wl);
1063
1064 out:
1065         mutex_unlock(&wl->mutex);
1066
1067         return ret;
1068 }
1069
1070 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1071                                        struct ieee80211_vif *vif,
1072                                        struct ieee80211_bss_conf *bss_conf,
1073                                        u32 changed)
1074 {
1075         enum wl1251_cmd_ps_mode mode;
1076         struct wl1251 *wl = hw->priv;
1077         struct sk_buff *beacon;
1078         int ret;
1079
1080         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1081
1082         mutex_lock(&wl->mutex);
1083
1084         ret = wl1251_ps_elp_wakeup(wl);
1085         if (ret < 0)
1086                 goto out;
1087
1088         if (changed & BSS_CHANGED_ASSOC) {
1089                 if (bss_conf->assoc) {
1090                         wl->beacon_int = bss_conf->beacon_int;
1091                         wl->dtim_period = bss_conf->dtim_period;
1092
1093                         /* FIXME: call join */
1094
1095                         wl->aid = bss_conf->aid;
1096
1097                         ret = wl1251_build_ps_poll(wl, wl->aid);
1098                         if (ret < 0)
1099                                 goto out_sleep;
1100
1101                         ret = wl1251_acx_aid(wl, wl->aid);
1102                         if (ret < 0)
1103                                 goto out_sleep;
1104
1105                         /* If we want to go in PSM but we're not there yet */
1106                         if (wl->psm_requested && !wl->psm) {
1107                                 mode = STATION_POWER_SAVE_MODE;
1108                                 ret = wl1251_ps_set_mode(wl, mode);
1109                                 if (ret < 0)
1110                                         goto out_sleep;
1111                         }
1112                 } else {
1113                         /* use defaults when not associated */
1114                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1115                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1116                 }
1117         }
1118         if (changed & BSS_CHANGED_ERP_SLOT) {
1119                 if (bss_conf->use_short_slot)
1120                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1121                 else
1122                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1123                 if (ret < 0) {
1124                         wl1251_warning("Set slot time failed %d", ret);
1125                         goto out_sleep;
1126                 }
1127         }
1128
1129         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1130                 if (bss_conf->use_short_preamble)
1131                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1132                 else
1133                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1134         }
1135
1136         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1137                 if (bss_conf->use_cts_prot)
1138                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1139                 else
1140                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1141                 if (ret < 0) {
1142                         wl1251_warning("Set ctsprotect failed %d", ret);
1143                         goto out;
1144                 }
1145         }
1146
1147         if (changed & BSS_CHANGED_BSSID) {
1148                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1149
1150                 ret = wl1251_build_null_data(wl);
1151                 if (ret < 0)
1152                         goto out;
1153
1154                 if (wl->bss_type != BSS_TYPE_IBSS) {
1155                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1156                                           wl->beacon_int, wl->dtim_period);
1157                         if (ret < 0)
1158                                 goto out_sleep;
1159                         wl1251_warning("Set ctsprotect failed %d", ret);
1160                         goto out_sleep;
1161                 }
1162         }
1163
1164         if (changed & BSS_CHANGED_BEACON) {
1165                 beacon = ieee80211_beacon_get(hw, vif);
1166                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1167                                               beacon->len);
1168
1169                 if (ret < 0) {
1170                         dev_kfree_skb(beacon);
1171                         goto out;
1172                 }
1173
1174                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1175                                               beacon->len);
1176
1177                 dev_kfree_skb(beacon);
1178
1179                 if (ret < 0)
1180                         goto out;
1181
1182                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1183                                   wl->channel, wl->dtim_period);
1184
1185                 if (ret < 0)
1186                         goto out;
1187         }
1188
1189 out_sleep:
1190         wl1251_ps_elp_sleep(wl);
1191
1192 out:
1193         mutex_unlock(&wl->mutex);
1194 }
1195
1196
1197 /* can't be const, mac80211 writes to this */
1198 static struct ieee80211_rate wl1251_rates[] = {
1199         { .bitrate = 10,
1200           .hw_value = 0x1,
1201           .hw_value_short = 0x1, },
1202         { .bitrate = 20,
1203           .hw_value = 0x2,
1204           .hw_value_short = 0x2,
1205           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1206         { .bitrate = 55,
1207           .hw_value = 0x4,
1208           .hw_value_short = 0x4,
1209           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1210         { .bitrate = 110,
1211           .hw_value = 0x20,
1212           .hw_value_short = 0x20,
1213           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1214         { .bitrate = 60,
1215           .hw_value = 0x8,
1216           .hw_value_short = 0x8, },
1217         { .bitrate = 90,
1218           .hw_value = 0x10,
1219           .hw_value_short = 0x10, },
1220         { .bitrate = 120,
1221           .hw_value = 0x40,
1222           .hw_value_short = 0x40, },
1223         { .bitrate = 180,
1224           .hw_value = 0x80,
1225           .hw_value_short = 0x80, },
1226         { .bitrate = 240,
1227           .hw_value = 0x200,
1228           .hw_value_short = 0x200, },
1229         { .bitrate = 360,
1230          .hw_value = 0x400,
1231          .hw_value_short = 0x400, },
1232         { .bitrate = 480,
1233           .hw_value = 0x800,
1234           .hw_value_short = 0x800, },
1235         { .bitrate = 540,
1236           .hw_value = 0x1000,
1237           .hw_value_short = 0x1000, },
1238 };
1239
1240 /* can't be const, mac80211 writes to this */
1241 static struct ieee80211_channel wl1251_channels[] = {
1242         { .hw_value = 1, .center_freq = 2412},
1243         { .hw_value = 2, .center_freq = 2417},
1244         { .hw_value = 3, .center_freq = 2422},
1245         { .hw_value = 4, .center_freq = 2427},
1246         { .hw_value = 5, .center_freq = 2432},
1247         { .hw_value = 6, .center_freq = 2437},
1248         { .hw_value = 7, .center_freq = 2442},
1249         { .hw_value = 8, .center_freq = 2447},
1250         { .hw_value = 9, .center_freq = 2452},
1251         { .hw_value = 10, .center_freq = 2457},
1252         { .hw_value = 11, .center_freq = 2462},
1253         { .hw_value = 12, .center_freq = 2467},
1254         { .hw_value = 13, .center_freq = 2472},
1255 };
1256
1257 /* can't be const, mac80211 writes to this */
1258 static struct ieee80211_supported_band wl1251_band_2ghz = {
1259         .channels = wl1251_channels,
1260         .n_channels = ARRAY_SIZE(wl1251_channels),
1261         .bitrates = wl1251_rates,
1262         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1263 };
1264
1265 static const struct ieee80211_ops wl1251_ops = {
1266         .start = wl1251_op_start,
1267         .stop = wl1251_op_stop,
1268         .add_interface = wl1251_op_add_interface,
1269         .remove_interface = wl1251_op_remove_interface,
1270         .config = wl1251_op_config,
1271         .configure_filter = wl1251_op_configure_filter,
1272         .tx = wl1251_op_tx,
1273         .set_key = wl1251_op_set_key,
1274         .hw_scan = wl1251_op_hw_scan,
1275         .bss_info_changed = wl1251_op_bss_info_changed,
1276         .set_rts_threshold = wl1251_op_set_rts_threshold,
1277 };
1278
1279 static int wl1251_register_hw(struct wl1251 *wl)
1280 {
1281         int ret;
1282
1283         if (wl->mac80211_registered)
1284                 return 0;
1285
1286         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1287
1288         ret = ieee80211_register_hw(wl->hw);
1289         if (ret < 0) {
1290                 wl1251_error("unable to register mac80211 hw: %d", ret);
1291                 return ret;
1292         }
1293
1294         wl->mac80211_registered = true;
1295
1296         wl1251_notice("loaded");
1297
1298         return 0;
1299 }
1300
1301 int wl1251_init_ieee80211(struct wl1251 *wl)
1302 {
1303         int ret;
1304
1305         /* The tx descriptor buffer and the TKIP space */
1306         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1307                 + WL1251_TKIP_IV_SPACE;
1308
1309         /* unit us */
1310         /* FIXME: find a proper value */
1311         wl->hw->channel_change_time = 10000;
1312
1313         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1314                 IEEE80211_HW_NOISE_DBM |
1315                 IEEE80211_HW_SUPPORTS_PS;
1316
1317         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1318         wl->hw->wiphy->max_scan_ssids = 1;
1319         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1320
1321         ret = wl1251_register_hw(wl);
1322         if (ret)
1323                 goto out;
1324
1325         wl1251_debugfs_init(wl);
1326         wl1251_notice("initialized");
1327
1328         ret = 0;
1329
1330 out:
1331         return ret;
1332 }
1333 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1334
1335 struct ieee80211_hw *wl1251_alloc_hw(void)
1336 {
1337         struct ieee80211_hw *hw;
1338         struct wl1251 *wl;
1339         int i;
1340         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1341
1342         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1343         if (!hw) {
1344                 wl1251_error("could not alloc ieee80211_hw");
1345                 return ERR_PTR(-ENOMEM);
1346         }
1347
1348         wl = hw->priv;
1349         memset(wl, 0, sizeof(*wl));
1350
1351         wl->hw = hw;
1352
1353         wl->data_in_count = 0;
1354
1355         skb_queue_head_init(&wl->tx_queue);
1356
1357         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1358         wl->channel = WL1251_DEFAULT_CHANNEL;
1359         wl->scanning = false;
1360         wl->default_key = 0;
1361         wl->listen_int = 1;
1362         wl->rx_counter = 0;
1363         wl->rx_handled = 0;
1364         wl->rx_current_buffer = 0;
1365         wl->rx_last_id = 0;
1366         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1367         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1368         wl->elp = false;
1369         wl->psm = 0;
1370         wl->psm_requested = false;
1371         wl->tx_queue_stopped = false;
1372         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1373         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1374         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1375
1376         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1377                 wl->tx_frames[i] = NULL;
1378
1379         wl->next_tx_complete = 0;
1380
1381         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1382         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1383
1384         /*
1385          * In case our MAC address is not correctly set,
1386          * we use a random but Nokia MAC.
1387          */
1388         memcpy(wl->mac_addr, nokia_oui, 3);
1389         get_random_bytes(wl->mac_addr + 3, 3);
1390
1391         wl->state = WL1251_STATE_OFF;
1392         mutex_init(&wl->mutex);
1393
1394         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1395         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1396
1397         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1398         if (!wl->rx_descriptor) {
1399                 wl1251_error("could not allocate memory for rx descriptor");
1400                 ieee80211_free_hw(hw);
1401                 return ERR_PTR(-ENOMEM);
1402         }
1403
1404         return hw;
1405 }
1406 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1407
1408 int wl1251_free_hw(struct wl1251 *wl)
1409 {
1410         ieee80211_unregister_hw(wl->hw);
1411
1412         wl1251_debugfs_exit(wl);
1413
1414         kfree(wl->target_mem_map);
1415         kfree(wl->data_path);
1416         kfree(wl->fw);
1417         wl->fw = NULL;
1418         kfree(wl->nvs);
1419         wl->nvs = NULL;
1420
1421         kfree(wl->rx_descriptor);
1422         wl->rx_descriptor = NULL;
1423
1424         ieee80211_free_hw(wl->hw);
1425
1426         return 0;
1427 }
1428 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1429
1430 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1431 MODULE_LICENSE("GPL");
1432 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1433 MODULE_ALIAS("spi:wl1251");
1434 MODULE_FIRMWARE(WL1251_FW_NAME);