drivers/net/wireless/wl12xx/wl1271_main.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@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/platform_device.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/firmware.h>
  28 #include <linux/delay.h>
  29 #include <linux/irq.h>
  30 #include <linux/spi/spi.h>
  31 #include <linux/crc32.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/spi/wl12xx.h>
  34
  35 #include "wl1271.h"
  36 #include "wl12xx_80211.h"
  37 #include "wl1271_reg.h"
  38 #include "wl1271_spi.h"
  39 #include "wl1271_event.h"
  40 #include "wl1271_tx.h"
  41 #include "wl1271_rx.h"
  42 #include "wl1271_ps.h"
  43 #include "wl1271_init.h"
  44 #include "wl1271_debugfs.h"
  45 #include "wl1271_cmd.h"
  46 #include "wl1271_boot.h"
  47
  48 static int wl1271_plt_init(struct wl1271 *wl)
  49 {
  50         int ret;
  51
  52         ret = wl1271_acx_init_mem_config(wl);
  53         if (ret < 0)
  54                 return ret;
  55
  56         ret = wl1271_cmd_data_path(wl, wl->channel, 1);
  57         if (ret < 0)
  58                 return ret;
  59
  60         return 0;
  61 }
  62
  63 static void wl1271_disable_interrupts(struct wl1271 *wl)
  64 {
  65         disable_irq(wl->irq);
  66 }
  67
  68 static void wl1271_power_off(struct wl1271 *wl)
  69 {
  70         wl->set_power(false);
  71 }
  72
  73 static void wl1271_power_on(struct wl1271 *wl)
  74 {
  75         wl->set_power(true);
  76 }
  77
  78 static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status)
  79 {
  80         u32 total = 0;
  81         int i;
  82
  83         /*
  84          * FIXME: Reading the FW status directly from the registers seems to
  85          * be the right thing to do, but it doesn't work.  And in the
  86          * reference driver, there is a workaround called
  87          * USE_SDIO_24M_WORKAROUND, which reads the status from memory
  88          * instead, so we do the same here.
  89          */
  90
  91         wl1271_spi_mem_read(wl, STATUS_MEM_ADDRESS, status, sizeof(*status));
  92
  93         wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
  94                      "drv_rx_counter = %d, tx_results_counter = %d)",
  95                      status->intr,
  96                      status->fw_rx_counter,
  97                      status->drv_rx_counter,
  98                      status->tx_results_counter);
  99
 100         /* update number of available TX blocks */
 101         for (i = 0; i < NUM_TX_QUEUES; i++) {
 102                 u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
 103                 wl->tx_blocks_freed[i] = status->tx_released_blks[i];
 104                 wl->tx_blocks_available += cnt;
 105                 total += cnt;
 106         }
 107
 108         /* if more blocks are available now, schedule some tx work */
 109         if (total && !skb_queue_empty(&wl->tx_queue))
 110                 schedule_work(&wl->tx_work);
 111
 112         /* update the host-chipset time offset */
 113         wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
 114 }
 115
 116 #define WL1271_IRQ_MAX_LOOPS 10
 117 static void wl1271_irq_work(struct work_struct *work)
 118 {
 119         u32 intr, ctr = WL1271_IRQ_MAX_LOOPS;
 120         int ret;
 121         struct wl1271 *wl =
 122                 container_of(work, struct wl1271, irq_work);
 123
 124         mutex_lock(&wl->mutex);
 125
 126         wl1271_debug(DEBUG_IRQ, "IRQ work");
 127
 128         if (wl->state == WL1271_STATE_OFF)
 129                 goto out;
 130
 131         ret = wl1271_ps_elp_wakeup(wl, true);
 132         if (ret < 0)
 133                 goto out;
 134
 135         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
 136
 137         intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 138         if (!intr) {
 139                 wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
 140                 goto out_sleep;
 141         }
 142
 143         intr &= WL1271_INTR_MASK;
 144
 145         do {
 146                 wl1271_fw_status(wl, wl->fw_status);
 147
 148
 149                 if (intr & (WL1271_ACX_INTR_EVENT_A |
 150                             WL1271_ACX_INTR_EVENT_B)) {
 151                         wl1271_debug(DEBUG_IRQ,
 152                                      "WL1271_ACX_INTR_EVENT (0x%x)", intr);
 153                         if (intr & WL1271_ACX_INTR_EVENT_A)
 154                                 wl1271_event_handle(wl, 0);
 155                         else
 156                                 wl1271_event_handle(wl, 1);
 157                 }
 158
 159                 if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
 160                         wl1271_debug(DEBUG_IRQ,
 161                                      "WL1271_ACX_INTR_INIT_COMPLETE");
 162
 163                 if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
 164                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
 165
 166                 if (intr & WL1271_ACX_INTR_DATA) {
 167                         u8 tx_res_cnt = wl->fw_status->tx_results_counter -
 168                                 wl->tx_results_count;
 169
 170                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
 171
 172                         /* check for tx results */
 173                         if (tx_res_cnt)
 174                                 wl1271_tx_complete(wl, tx_res_cnt);
 175
 176                         wl1271_rx(wl, wl->fw_status);
 177                 }
 178
 179                 intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 180                 intr &= WL1271_INTR_MASK;
 181         } while (intr && --ctr);
 182
 183 out_sleep:
 184         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
 185                            WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 186         wl1271_ps_elp_sleep(wl);
 187
 188 out:
 189         mutex_unlock(&wl->mutex);
 190 }
 191
 192 static irqreturn_t wl1271_irq(int irq, void *cookie)
 193 {
 194         struct wl1271 *wl;
 195         unsigned long flags;
 196
 197         wl1271_debug(DEBUG_IRQ, "IRQ");
 198
 199         wl = cookie;
 200
 201         /* complete the ELP completion */
 202         spin_lock_irqsave(&wl->wl_lock, flags);
 203         if (wl->elp_compl) {
 204                 complete(wl->elp_compl);
 205                 wl->elp_compl = NULL;
 206         }
 207
 208         schedule_work(&wl->irq_work);
 209         spin_unlock_irqrestore(&wl->wl_lock, flags);
 210
 211         return IRQ_HANDLED;
 212 }
 213
 214 static int wl1271_fetch_firmware(struct wl1271 *wl)
 215 {
 216         const struct firmware *fw;
 217         int ret;
 218
 219         ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
 220
 221         if (ret < 0) {
 222                 wl1271_error("could not get firmware: %d", ret);
 223                 return ret;
 224         }
 225
 226         if (fw->size % 4) {
 227                 wl1271_error("firmware size is not multiple of 32 bits: %zu",
 228                              fw->size);
 229                 ret = -EILSEQ;
 230                 goto out;
 231         }
 232
 233         wl->fw_len = fw->size;
 234         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
 235
 236         if (!wl->fw) {
 237                 wl1271_error("could not allocate memory for the firmware");
 238                 ret = -ENOMEM;
 239                 goto out;
 240         }
 241
 242         memcpy(wl->fw, fw->data, wl->fw_len);
 243
 244         ret = 0;
 245
 246 out:
 247         release_firmware(fw);
 248
 249         return ret;
 250 }
 251
 252 static int wl1271_fetch_nvs(struct wl1271 *wl)
 253 {
 254         const struct firmware *fw;
 255         int ret;
 256
 257         ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
 258
 259         if (ret < 0) {
 260                 wl1271_error("could not get nvs file: %d", ret);
 261                 return ret;
 262         }
 263
 264         if (fw->size % 4) {
 265                 wl1271_error("nvs size is not multiple of 32 bits: %zu",
 266                              fw->size);
 267                 ret = -EILSEQ;
 268                 goto out;
 269         }
 270
 271         wl->nvs_len = fw->size;
 272         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 273
 274         if (!wl->nvs) {
 275                 wl1271_error("could not allocate memory for the nvs file");
 276                 ret = -ENOMEM;
 277                 goto out;
 278         }
 279
 280         memcpy(wl->nvs, fw->data, wl->nvs_len);
 281
 282         ret = 0;
 283
 284 out:
 285         release_firmware(fw);
 286
 287         return ret;
 288 }
 289
 290 static void wl1271_fw_wakeup(struct wl1271 *wl)
 291 {
 292         u32 elp_reg;
 293
 294         elp_reg = ELPCTRL_WAKE_UP;
 295         wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 296 }
 297
 298 static int wl1271_setup(struct wl1271 *wl)
 299 {
 300         wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
 301         if (!wl->fw_status)
 302                 return -ENOMEM;
 303
 304         wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
 305         if (!wl->tx_res_if) {
 306                 kfree(wl->fw_status);
 307                 return -ENOMEM;
 308         }
 309
 310         INIT_WORK(&wl->irq_work, wl1271_irq_work);
 311         INIT_WORK(&wl->tx_work, wl1271_tx_work);
 312         return 0;
 313 }
 314
 315 static int wl1271_chip_wakeup(struct wl1271 *wl)
 316 {
 317         int ret = 0;
 318
 319         wl1271_power_on(wl);
 320         msleep(WL1271_POWER_ON_SLEEP);
 321         wl1271_spi_reset(wl);
 322         wl1271_spi_init(wl);
 323
 324         /* We don't need a real memory partition here, because we only want
 325          * to use the registers at this point. */
 326         wl1271_set_partition(wl,
 327                              0x00000000,
 328                              0x00000000,
 329                              REGISTERS_BASE,
 330                              REGISTERS_DOWN_SIZE);
 331
 332         /* ELP module wake up */
 333         wl1271_fw_wakeup(wl);
 334
 335         /* whal_FwCtrl_BootSm() */
 336
 337         /* 0. read chip id from CHIP_ID */
 338         wl->chip.id = wl1271_reg_read32(wl, CHIP_ID_B);
 339
 340         /* 1. check if chip id is valid */
 341
 342         switch (wl->chip.id) {
 343         case CHIP_ID_1271_PG10:
 344                 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
 345                                wl->chip.id);
 346
 347                 ret = wl1271_setup(wl);
 348                 if (ret < 0)
 349                         goto out;
 350                 break;
 351         case CHIP_ID_1271_PG20:
 352                 wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
 353                              wl->chip.id);
 354
 355                 ret = wl1271_setup(wl);
 356                 if (ret < 0)
 357                         goto out;
 358                 break;
 359         default:
 360                 wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
 361                 ret = -ENODEV;
 362                 goto out;
 363         }
 364
 365         if (wl->fw == NULL) {
 366                 ret = wl1271_fetch_firmware(wl);
 367                 if (ret < 0)
 368                         goto out;
 369         }
 370
 371         /* No NVS from netlink, try to get it from the filesystem */
 372         if (wl->nvs == NULL) {
 373                 ret = wl1271_fetch_nvs(wl);
 374                 if (ret < 0)
 375                         goto out;
 376         }
 377
 378 out:
 379         return ret;
 380 }
 381
 382 static void wl1271_filter_work(struct work_struct *work)
 383 {
 384         struct wl1271 *wl =
 385                 container_of(work, struct wl1271, filter_work);
 386         int ret;
 387
 388         mutex_lock(&wl->mutex);
 389
 390         if (wl->state == WL1271_STATE_OFF)
 391                 goto out;
 392
 393         ret = wl1271_ps_elp_wakeup(wl, false);
 394         if (ret < 0)
 395                 goto out;
 396
 397         /* FIXME: replace the magic numbers with proper definitions */
 398         ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 399         if (ret < 0)
 400                 goto out_sleep;
 401
 402 out_sleep:
 403         wl1271_ps_elp_sleep(wl);
 404
 405 out:
 406         mutex_unlock(&wl->mutex);
 407 }
 408
 409 int wl1271_plt_start(struct wl1271 *wl)
 410 {
 411         int ret;
 412
 413         mutex_lock(&wl->mutex);
 414
 415         wl1271_notice("power up");
 416
 417         if (wl->state != WL1271_STATE_OFF) {
 418                 wl1271_error("cannot go into PLT state because not "
 419                              "in off state: %d", wl->state);
 420                 ret = -EBUSY;
 421                 goto out;
 422         }
 423
 424         wl->state = WL1271_STATE_PLT;
 425
 426         ret = wl1271_chip_wakeup(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         ret = wl1271_boot(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
 435
 436         ret = wl1271_plt_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440 out:
 441         mutex_unlock(&wl->mutex);
 442
 443         return ret;
 444 }
 445
 446 int wl1271_plt_stop(struct wl1271 *wl)
 447 {
 448         int ret = 0;
 449
 450         mutex_lock(&wl->mutex);
 451
 452         wl1271_notice("power down");
 453
 454         if (wl->state != WL1271_STATE_PLT) {
 455                 wl1271_error("cannot power down because not in PLT "
 456                              "state: %d", wl->state);
 457                 ret = -EBUSY;
 458                 goto out;
 459         }
 460
 461         wl1271_disable_interrupts(wl);
 462         wl1271_power_off(wl);
 463
 464         wl->state = WL1271_STATE_OFF;
 465
 466 out:
 467         mutex_unlock(&wl->mutex);
 468
 469         return ret;
 470 }
 471
 472
 473 static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 474 {
 475         struct wl1271 *wl = hw->priv;
 476
 477         skb_queue_tail(&wl->tx_queue, skb);
 478
 479         /*
 480          * The chip specific setup must run before the first TX packet -
 481          * before that, the tx_work will not be initialized!
 482          */
 483
 484         schedule_work(&wl->tx_work);
 485
 486         /*
 487          * The workqueue is slow to process the tx_queue and we need stop
 488          * the queue here, otherwise the queue will get too long.
 489          */
 490         if (skb_queue_len(&wl->tx_queue) >= WL1271_TX_QUEUE_MAX_LENGTH) {
 491                 ieee80211_stop_queues(wl->hw);
 492
 493                 /*
 494                  * FIXME: this is racy, the variable is not properly
 495                  * protected. Maybe fix this by removing the stupid
 496                  * variable altogether and checking the real queue state?
 497                  */
 498                 wl->tx_queue_stopped = true;
 499         }
 500
 501         return NETDEV_TX_OK;
 502 }
 503
 504 static int wl1271_op_start(struct ieee80211_hw *hw)
 505 {
 506         struct wl1271 *wl = hw->priv;
 507         int ret = 0;
 508
 509         wl1271_debug(DEBUG_MAC80211, "mac80211 start");
 510
 511         mutex_lock(&wl->mutex);
 512
 513         if (wl->state != WL1271_STATE_OFF) {
 514                 wl1271_error("cannot start because not in off state: %d",
 515                              wl->state);
 516                 ret = -EBUSY;
 517                 goto out;
 518         }
 519
 520         ret = wl1271_chip_wakeup(wl);
 521         if (ret < 0)
 522                 goto out;
 523
 524         ret = wl1271_boot(wl);
 525         if (ret < 0)
 526                 goto out;
 527
 528         ret = wl1271_hw_init(wl);
 529         if (ret < 0)
 530                 goto out;
 531
 532         wl->state = WL1271_STATE_ON;
 533
 534         wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
 535
 536 out:
 537         if (ret < 0)
 538                 wl1271_power_off(wl);
 539
 540         mutex_unlock(&wl->mutex);
 541
 542         return ret;
 543 }
 544
 545 static void wl1271_op_stop(struct ieee80211_hw *hw)
 546 {
 547         struct wl1271 *wl = hw->priv;
 548         int i;
 549
 550         wl1271_info("down");
 551
 552         wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
 553
 554         mutex_lock(&wl->mutex);
 555
 556         WARN_ON(wl->state != WL1271_STATE_ON);
 557
 558         if (wl->scanning) {
 559                 mutex_unlock(&wl->mutex);
 560                 ieee80211_scan_completed(wl->hw, true);
 561                 mutex_lock(&wl->mutex);
 562                 wl->scanning = false;
 563         }
 564
 565         wl->state = WL1271_STATE_OFF;
 566
 567         wl1271_disable_interrupts(wl);
 568
 569         mutex_unlock(&wl->mutex);
 570
 571         cancel_work_sync(&wl->irq_work);
 572         cancel_work_sync(&wl->tx_work);
 573         cancel_work_sync(&wl->filter_work);
 574
 575         mutex_lock(&wl->mutex);
 576
 577         /* let's notify MAC80211 about the remaining pending TX frames */
 578         wl1271_tx_flush(wl);
 579         wl1271_power_off(wl);
 580
 581         memset(wl->bssid, 0, ETH_ALEN);
 582         memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
 583         wl->ssid_len = 0;
 584         wl->listen_int = 1;
 585         wl->bss_type = MAX_BSS_TYPE;
 586
 587         wl->rx_counter = 0;
 588         wl->elp = false;
 589         wl->psm = 0;
 590         wl->tx_queue_stopped = false;
 591         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
 592         wl->tx_blocks_available = 0;
 593         wl->tx_results_count = 0;
 594         wl->tx_packets_count = 0;
 595         wl->time_offset = 0;
 596         wl->session_counter = 0;
 597         for (i = 0; i < NUM_TX_QUEUES; i++)
 598                 wl->tx_blocks_freed[i] = 0;
 599
 600         wl1271_debugfs_reset(wl);
 601         mutex_unlock(&wl->mutex);
 602 }
 603
 604 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 605                                    struct ieee80211_if_init_conf *conf)
 606 {
 607         struct wl1271 *wl = hw->priv;
 608         int ret = 0;
 609
 610         wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 611                      conf->type, conf->mac_addr);
 612
 613         mutex_lock(&wl->mutex);
 614
 615         switch (conf->type) {
 616         case NL80211_IFTYPE_STATION:
 617                 wl->bss_type = BSS_TYPE_STA_BSS;
 618                 break;
 619         case NL80211_IFTYPE_ADHOC:
 620                 wl->bss_type = BSS_TYPE_IBSS;
 621                 break;
 622         default:
 623                 ret = -EOPNOTSUPP;
 624                 goto out;
 625         }
 626
 627         /* FIXME: what if conf->mac_addr changes? */
 628
 629 out:
 630         mutex_unlock(&wl->mutex);
 631         return ret;
 632 }
 633
 634 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
 635                                          struct ieee80211_if_init_conf *conf)
 636 {
 637         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 638 }
 639
 640 #if 0
 641 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
 642                                       struct ieee80211_vif *vif,
 643                                       struct ieee80211_if_conf *conf)
 644 {
 645         struct wl1271 *wl = hw->priv;
 646         struct sk_buff *beacon;
 647         int ret;
 648
 649         wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %pM",
 650                      conf->bssid);
 651         wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
 652                           conf->ssid_len);
 653
 654         mutex_lock(&wl->mutex);
 655
 656         ret = wl1271_ps_elp_wakeup(wl, false);
 657         if (ret < 0)
 658                 goto out;
 659
 660         memcpy(wl->bssid, conf->bssid, ETH_ALEN);
 661
 662         ret = wl1271_cmd_build_null_data(wl);
 663         if (ret < 0)
 664                 goto out_sleep;
 665
 666         wl->ssid_len = conf->ssid_len;
 667         if (wl->ssid_len)
 668                 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
 669
 670         if (wl->bss_type != BSS_TYPE_IBSS) {
 671                 /* FIXME: replace the magic numbers with proper definitions */
 672                 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
 673                 if (ret < 0)
 674                         goto out_sleep;
 675         }
 676
 677         if (conf->changed & IEEE80211_IFCC_BEACON) {
 678                 beacon = ieee80211_beacon_get(hw, vif);
 679                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
 680                                               beacon->data, beacon->len);
 681
 682                 if (ret < 0) {
 683                         dev_kfree_skb(beacon);
 684                         goto out_sleep;
 685                 }
 686
 687                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
 688                                               beacon->data, beacon->len);
 689
 690                 dev_kfree_skb(beacon);
 691
 692                 if (ret < 0)
 693                         goto out_sleep;
 694
 695                 /* FIXME: replace the magic numbers with proper definitions */
 696                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 697
 698                 if (ret < 0)
 699                         goto out_sleep;
 700         }
 701
 702 out_sleep:
 703         wl1271_ps_elp_sleep(wl);
 704
 705 out:
 706         mutex_unlock(&wl->mutex);
 707
 708         return ret;
 709 }
 710 #endif
 711
 712 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
 713 {
 714         struct wl1271 *wl = hw->priv;
 715         struct ieee80211_conf *conf = &hw->conf;
 716         int channel, ret = 0;
 717
 718         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 719
 720         wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 721                      channel,
 722                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 723                      conf->power_level);
 724
 725         mutex_lock(&wl->mutex);
 726
 727         ret = wl1271_ps_elp_wakeup(wl, false);
 728         if (ret < 0)
 729                 goto out;
 730
 731         if (channel != wl->channel) {
 732                 u8 old_channel = wl->channel;
 733                 wl->channel = channel;
 734
 735                 /* FIXME: use beacon interval provided by mac80211 */
 736                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 737                 if (ret < 0) {
 738                         wl->channel = old_channel;
 739                         goto out_sleep;
 740                 }
 741         }
 742
 743         ret = wl1271_cmd_build_null_data(wl);
 744         if (ret < 0)
 745                 goto out_sleep;
 746
 747         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 748                 wl1271_info("psm enabled");
 749
 750                 wl->psm_requested = true;
 751
 752                 /*
 753                  * We enter PSM only if we're already associated.
 754                  * If we're not, we'll enter it when joining an SSID,
 755                  * through the bss_info_changed() hook.
 756                  */
 757                 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 758         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 759                    wl->psm_requested) {
 760                 wl1271_info("psm disabled");
 761
 762                 wl->psm_requested = false;
 763
 764                 if (wl->psm)
 765                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
 766         }
 767
 768         if (conf->power_level != wl->power_level) {
 769                 ret = wl1271_acx_tx_power(wl, conf->power_level);
 770                 if (ret < 0)
 771                         goto out;
 772
 773                 wl->power_level = conf->power_level;
 774         }
 775
 776 out_sleep:
 777         wl1271_ps_elp_sleep(wl);
 778
 779 out:
 780         mutex_unlock(&wl->mutex);
 781
 782         return ret;
 783 }
 784
 785 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 786                                   FIF_ALLMULTI | \
 787                                   FIF_FCSFAIL | \
 788                                   FIF_BCN_PRBRESP_PROMISC | \
 789                                   FIF_CONTROL | \
 790                                   FIF_OTHER_BSS)
 791
 792 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
 793                                        unsigned int changed,
 794                                        unsigned int *total,u64 multicast)
 795 {
 796         struct wl1271 *wl = hw->priv;
 797
 798         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
 799
 800         *total &= WL1271_SUPPORTED_FILTERS;
 801         changed &= WL1271_SUPPORTED_FILTERS;
 802
 803         if (changed == 0)
 804                 return;
 805
 806         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 807         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
 808         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
 809
 810         /*
 811          * FIXME: workqueues need to be properly cancelled on stop(), for
 812          * now let's just disable changing the filter settings. They will
 813          * be updated any on config().
 814          */
 815         /* schedule_work(&wl->filter_work); */
 816 }
 817
 818 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 819                              struct ieee80211_vif *vif,
 820                              struct ieee80211_sta *sta,
 821                              struct ieee80211_key_conf *key_conf)
 822 {
 823         struct wl1271 *wl = hw->priv;
 824         const u8 *addr;
 825         int ret;
 826         u8 key_type;
 827
 828         static const u8 bcast_addr[ETH_ALEN] =
 829                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 830
 831         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
 832
 833         addr = sta ? sta->addr : bcast_addr;
 834
 835         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 836         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 837         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 838                      key_conf->alg, key_conf->keyidx,
 839                      key_conf->keylen, key_conf->flags);
 840         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
 841
 842         if (is_zero_ether_addr(addr)) {
 843                 /* We dont support TX only encryption */
 844                 ret = -EOPNOTSUPP;
 845                 goto out;
 846         }
 847
 848         mutex_lock(&wl->mutex);
 849
 850         ret = wl1271_ps_elp_wakeup(wl, false);
 851         if (ret < 0)
 852                 goto out_unlock;
 853
 854         switch (key_conf->alg) {
 855         case ALG_WEP:
 856                 key_type = KEY_WEP;
 857
 858                 key_conf->hw_key_idx = key_conf->keyidx;
 859                 break;
 860         case ALG_TKIP:
 861                 key_type = KEY_TKIP;
 862
 863                 key_conf->hw_key_idx = key_conf->keyidx;
 864                 break;
 865         case ALG_CCMP:
 866                 key_type = KEY_AES;
 867
 868                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 869                 break;
 870         default:
 871                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
 872
 873                 ret = -EOPNOTSUPP;
 874                 goto out_sleep;
 875         }
 876
 877         switch (cmd) {
 878         case SET_KEY:
 879                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
 880                                          key_conf->keyidx, key_type,
 881                                          key_conf->keylen, key_conf->key,
 882                                          addr);
 883                 if (ret < 0) {
 884                         wl1271_error("Could not add or replace key");
 885                         goto out_sleep;
 886                 }
 887                 break;
 888
 889         case DISABLE_KEY:
 890                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
 891                                          key_conf->keyidx, key_type,
 892                                          key_conf->keylen, key_conf->key,
 893                                          addr);
 894                 if (ret < 0) {
 895                         wl1271_error("Could not remove key");
 896                         goto out_sleep;
 897                 }
 898                 break;
 899
 900         default:
 901                 wl1271_error("Unsupported key cmd 0x%x", cmd);
 902                 ret = -EOPNOTSUPP;
 903                 goto out_sleep;
 904
 905                 break;
 906         }
 907
 908 out_sleep:
 909         wl1271_ps_elp_sleep(wl);
 910
 911 out_unlock:
 912         mutex_unlock(&wl->mutex);
 913
 914 out:
 915         return ret;
 916 }
 917
 918 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
 919                              struct cfg80211_scan_request *req)
 920 {
 921         struct wl1271 *wl = hw->priv;
 922         int ret;
 923         u8 *ssid = NULL;
 924         size_t ssid_len = 0;
 925
 926         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
 927
 928         if (req->n_ssids) {
 929                 ssid = req->ssids[0].ssid;
 930                 ssid_len = req->ssids[0].ssid_len;
 931         }
 932
 933         mutex_lock(&wl->mutex);
 934
 935         ret = wl1271_ps_elp_wakeup(wl, false);
 936         if (ret < 0)
 937                 goto out;
 938
 939         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 940
 941         wl1271_ps_elp_sleep(wl);
 942
 943 out:
 944         mutex_unlock(&wl->mutex);
 945
 946         return ret;
 947 }
 948
 949 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 950 {
 951         struct wl1271 *wl = hw->priv;
 952         int ret;
 953
 954         mutex_lock(&wl->mutex);
 955
 956         ret = wl1271_ps_elp_wakeup(wl, false);
 957         if (ret < 0)
 958                 goto out;
 959
 960         ret = wl1271_acx_rts_threshold(wl, (u16) value);
 961         if (ret < 0)
 962                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
 963
 964         wl1271_ps_elp_sleep(wl);
 965
 966 out:
 967         mutex_unlock(&wl->mutex);
 968
 969         return ret;
 970 }
 971
 972 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
 973                                        struct ieee80211_vif *vif,
 974                                        struct ieee80211_bss_conf *bss_conf,
 975                                        u32 changed)
 976 {
 977         enum wl1271_cmd_ps_mode mode;
 978         struct wl1271 *wl = hw->priv;
 979         int ret;
 980
 981         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 982
 983         mutex_lock(&wl->mutex);
 984
 985         ret = wl1271_ps_elp_wakeup(wl, false);
 986         if (ret < 0)
 987                 goto out;
 988
 989         if (changed & BSS_CHANGED_ASSOC) {
 990                 if (bss_conf->assoc) {
 991                         wl->aid = bss_conf->aid;
 992
 993                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
 994                         if (ret < 0)
 995                                 goto out_sleep;
 996
 997                         ret = wl1271_acx_aid(wl, wl->aid);
 998                         if (ret < 0)
 999                                 goto out_sleep;
1000
1001                         /* If we want to go in PSM but we're not there yet */
1002                         if (wl->psm_requested && !wl->psm) {
1003                                 mode = STATION_POWER_SAVE_MODE;
1004                                 ret = wl1271_ps_set_mode(wl, mode);
1005                                 if (ret < 0)
1006                                         goto out_sleep;
1007                         }
1008                 }
1009         }
1010         if (changed & BSS_CHANGED_ERP_SLOT) {
1011                 if (bss_conf->use_short_slot)
1012                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1013                 else
1014                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1015                 if (ret < 0) {
1016                         wl1271_warning("Set slot time failed %d", ret);
1017                         goto out_sleep;
1018                 }
1019         }
1020
1021         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1022                 if (bss_conf->use_short_preamble)
1023                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1024                 else
1025                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1026         }
1027
1028         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1029                 if (bss_conf->use_cts_prot)
1030                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1031                 else
1032                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1033                 if (ret < 0) {
1034                         wl1271_warning("Set ctsprotect failed %d", ret);
1035                         goto out_sleep;
1036                 }
1037         }
1038
1039 out_sleep:
1040         wl1271_ps_elp_sleep(wl);
1041
1042 out:
1043         mutex_unlock(&wl->mutex);
1044 }
1045
1046
1047 /* can't be const, mac80211 writes to this */
1048 static struct ieee80211_rate wl1271_rates[] = {
1049         { .bitrate = 10,
1050           .hw_value = 0x1,
1051           .hw_value_short = 0x1, },
1052         { .bitrate = 20,
1053           .hw_value = 0x2,
1054           .hw_value_short = 0x2,
1055           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1056         { .bitrate = 55,
1057           .hw_value = 0x4,
1058           .hw_value_short = 0x4,
1059           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1060         { .bitrate = 110,
1061           .hw_value = 0x20,
1062           .hw_value_short = 0x20,
1063           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1064         { .bitrate = 60,
1065           .hw_value = 0x8,
1066           .hw_value_short = 0x8, },
1067         { .bitrate = 90,
1068           .hw_value = 0x10,
1069           .hw_value_short = 0x10, },
1070         { .bitrate = 120,
1071           .hw_value = 0x40,
1072           .hw_value_short = 0x40, },
1073         { .bitrate = 180,
1074           .hw_value = 0x80,
1075           .hw_value_short = 0x80, },
1076         { .bitrate = 240,
1077           .hw_value = 0x200,
1078           .hw_value_short = 0x200, },
1079         { .bitrate = 360,
1080          .hw_value = 0x400,
1081          .hw_value_short = 0x400, },
1082         { .bitrate = 480,
1083           .hw_value = 0x800,
1084           .hw_value_short = 0x800, },
1085         { .bitrate = 540,
1086           .hw_value = 0x1000,
1087           .hw_value_short = 0x1000, },
1088 };
1089
1090 /* can't be const, mac80211 writes to this */
1091 static struct ieee80211_channel wl1271_channels[] = {
1092         { .hw_value = 1, .center_freq = 2412},
1093         { .hw_value = 2, .center_freq = 2417},
1094         { .hw_value = 3, .center_freq = 2422},
1095         { .hw_value = 4, .center_freq = 2427},
1096         { .hw_value = 5, .center_freq = 2432},
1097         { .hw_value = 6, .center_freq = 2437},
1098         { .hw_value = 7, .center_freq = 2442},
1099         { .hw_value = 8, .center_freq = 2447},
1100         { .hw_value = 9, .center_freq = 2452},
1101         { .hw_value = 10, .center_freq = 2457},
1102         { .hw_value = 11, .center_freq = 2462},
1103         { .hw_value = 12, .center_freq = 2467},
1104         { .hw_value = 13, .center_freq = 2472},
1105 };
1106
1107 /* can't be const, mac80211 writes to this */
1108 static struct ieee80211_supported_band wl1271_band_2ghz = {
1109         .channels = wl1271_channels,
1110         .n_channels = ARRAY_SIZE(wl1271_channels),
1111         .bitrates = wl1271_rates,
1112         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1113 };
1114
1115 static const struct ieee80211_ops wl1271_ops = {
1116         .start = wl1271_op_start,
1117         .stop = wl1271_op_stop,
1118         .add_interface = wl1271_op_add_interface,
1119         .remove_interface = wl1271_op_remove_interface,
1120         .config = wl1271_op_config,
1121 /*      .config_interface = wl1271_op_config_interface, */
1122         .configure_filter = wl1271_op_configure_filter,
1123         .tx = wl1271_op_tx,
1124         .set_key = wl1271_op_set_key,
1125         .hw_scan = wl1271_op_hw_scan,
1126         .bss_info_changed = wl1271_op_bss_info_changed,
1127         .set_rts_threshold = wl1271_op_set_rts_threshold,
1128 };
1129
1130 static int wl1271_register_hw(struct wl1271 *wl)
1131 {
1132         int ret;
1133
1134         if (wl->mac80211_registered)
1135                 return 0;
1136
1137         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1138
1139         ret = ieee80211_register_hw(wl->hw);
1140         if (ret < 0) {
1141                 wl1271_error("unable to register mac80211 hw: %d", ret);
1142                 return ret;
1143         }
1144
1145         wl->mac80211_registered = true;
1146
1147         wl1271_notice("loaded");
1148
1149         return 0;
1150 }
1151
1152 static int wl1271_init_ieee80211(struct wl1271 *wl)
1153 {
1154         /*
1155          * The tx descriptor buffer and the TKIP space.
1156          *
1157          * FIXME: add correct 1271 descriptor size
1158          */
1159         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1160
1161         /* unit us */
1162         /* FIXME: find a proper value */
1163         wl->hw->channel_change_time = 10000;
1164
1165         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1166                 IEEE80211_HW_NOISE_DBM;
1167
1168         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1169         wl->hw->wiphy->max_scan_ssids = 1;
1170         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1171
1172         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1173
1174         return 0;
1175 }
1176
1177 static void wl1271_device_release(struct device *dev)
1178 {
1179
1180 }
1181
1182 static struct platform_device wl1271_device = {
1183         .name           = "wl1271",
1184         .id             = -1,
1185
1186         /* device model insists to have a release function */
1187         .dev            = {
1188                 .release = wl1271_device_release,
1189         },
1190 };
1191
1192 #define WL1271_DEFAULT_CHANNEL 0
1193 static int __devinit wl1271_probe(struct spi_device *spi)
1194 {
1195         struct wl12xx_platform_data *pdata;
1196         struct ieee80211_hw *hw;
1197         struct wl1271 *wl;
1198         int ret, i;
1199         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1200
1201         pdata = spi->dev.platform_data;
1202         if (!pdata) {
1203                 wl1271_error("no platform data");
1204                 return -ENODEV;
1205         }
1206
1207         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1208         if (!hw) {
1209                 wl1271_error("could not alloc ieee80211_hw");
1210                 return -ENOMEM;
1211         }
1212
1213         wl = hw->priv;
1214         memset(wl, 0, sizeof(*wl));
1215
1216         wl->hw = hw;
1217         dev_set_drvdata(&spi->dev, wl);
1218         wl->spi = spi;
1219
1220         skb_queue_head_init(&wl->tx_queue);
1221
1222         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1223         wl->channel = WL1271_DEFAULT_CHANNEL;
1224         wl->scanning = false;
1225         wl->default_key = 0;
1226         wl->listen_int = 1;
1227         wl->rx_counter = 0;
1228         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1229         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1230         wl->elp = false;
1231         wl->psm = 0;
1232         wl->psm_requested = false;
1233         wl->tx_queue_stopped = false;
1234         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1235
1236         /* We use the default power on sleep time until we know which chip
1237          * we're using */
1238         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1239                 wl->tx_frames[i] = NULL;
1240
1241         spin_lock_init(&wl->wl_lock);
1242
1243         /*
1244          * In case our MAC address is not correctly set,
1245          * we use a random but Nokia MAC.
1246          */
1247         memcpy(wl->mac_addr, nokia_oui, 3);
1248         get_random_bytes(wl->mac_addr + 3, 3);
1249
1250         wl->state = WL1271_STATE_OFF;
1251         mutex_init(&wl->mutex);
1252
1253         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1254         if (!wl->rx_descriptor) {
1255                 wl1271_error("could not allocate memory for rx descriptor");
1256                 ret = -ENOMEM;
1257                 goto out_free;
1258         }
1259
1260         /* This is the only SPI value that we need to set here, the rest
1261          * comes from the board-peripherals file */
1262         spi->bits_per_word = 32;
1263
1264         ret = spi_setup(spi);
1265         if (ret < 0) {
1266                 wl1271_error("spi_setup failed");
1267                 goto out_free;
1268         }
1269
1270         wl->set_power = pdata->set_power;
1271         if (!wl->set_power) {
1272                 wl1271_error("set power function missing in platform data");
1273                 ret = -ENODEV;
1274                 goto out_free;
1275         }
1276
1277         wl->irq = spi->irq;
1278         if (wl->irq < 0) {
1279                 wl1271_error("irq missing in platform data");
1280                 ret = -ENODEV;
1281                 goto out_free;
1282         }
1283
1284         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1285         if (ret < 0) {
1286                 wl1271_error("request_irq() failed: %d", ret);
1287                 goto out_free;
1288         }
1289
1290         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1291
1292         disable_irq(wl->irq);
1293
1294         ret = platform_device_register(&wl1271_device);
1295         if (ret) {
1296                 wl1271_error("couldn't register platform device");
1297                 goto out_irq;
1298         }
1299         dev_set_drvdata(&wl1271_device.dev, wl);
1300
1301         ret = wl1271_init_ieee80211(wl);
1302         if (ret)
1303                 goto out_platform;
1304
1305         ret = wl1271_register_hw(wl);
1306         if (ret)
1307                 goto out_platform;
1308
1309         wl1271_debugfs_init(wl);
1310
1311         wl1271_notice("initialized");
1312
1313         return 0;
1314
1315  out_platform:
1316         platform_device_unregister(&wl1271_device);
1317
1318  out_irq:
1319         free_irq(wl->irq, wl);
1320
1321  out_free:
1322         kfree(wl->rx_descriptor);
1323         wl->rx_descriptor = NULL;
1324
1325         ieee80211_free_hw(hw);
1326
1327         return ret;
1328 }
1329
1330 static int __devexit wl1271_remove(struct spi_device *spi)
1331 {
1332         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1333
1334         ieee80211_unregister_hw(wl->hw);
1335
1336         wl1271_debugfs_exit(wl);
1337         platform_device_unregister(&wl1271_device);
1338         free_irq(wl->irq, wl);
1339         kfree(wl->target_mem_map);
1340         kfree(wl->fw);
1341         wl->fw = NULL;
1342         kfree(wl->nvs);
1343         wl->nvs = NULL;
1344
1345         kfree(wl->rx_descriptor);
1346         wl->rx_descriptor = NULL;
1347
1348         kfree(wl->fw_status);
1349         kfree(wl->tx_res_if);
1350
1351         ieee80211_free_hw(wl->hw);
1352
1353         return 0;
1354 }
1355
1356
1357 static struct spi_driver wl1271_spi_driver = {
1358         .driver = {
1359                 .name           = "wl1271",
1360                 .bus            = &spi_bus_type,
1361                 .owner          = THIS_MODULE,
1362         },
1363
1364         .probe          = wl1271_probe,
1365         .remove         = __devexit_p(wl1271_remove),
1366 };
1367
1368 static int __init wl1271_init(void)
1369 {
1370         int ret;
1371
1372         ret = spi_register_driver(&wl1271_spi_driver);
1373         if (ret < 0) {
1374                 wl1271_error("failed to register spi driver: %d", ret);
1375                 goto out;
1376         }
1377
1378 out:
1379         return ret;
1380 }
1381
1382 static void __exit wl1271_exit(void)
1383 {
1384         spi_unregister_driver(&wl1271_spi_driver);
1385
1386         wl1271_notice("unloaded");
1387 }
1388
1389 module_init(wl1271_init);
1390 module_exit(wl1271_exit);
1391
1392 MODULE_LICENSE("GPL");
1393 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");