drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl12xx
   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/spi/spi.h>
  30 #include <linux/crc32.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/spi/wl12xx.h>
  33
  34 #include "wl12xx.h"
  35 #include "wl12xx_80211.h"
  36 #include "reg.h"
  37 #include "wl1251_ops.h"
  38 #include "wl1251_spi.h"
  39 #include "wl1251_event.h"
  40 #include "wl1251_tx.h"
  41 #include "wl1251_rx.h"
  42 #include "wl1251_ps.h"
  43 #include "wl1251_init.h"
  44 #include "wl1251_debugfs.h"
  45
  46 static void wl12xx_disable_interrupts(struct wl12xx *wl)
  47 {
  48         disable_irq(wl->irq);
  49 }
  50
  51 static void wl12xx_power_off(struct wl12xx *wl)
  52 {
  53         wl->set_power(false);
  54 }
  55
  56 static void wl12xx_power_on(struct wl12xx *wl)
  57 {
  58         wl->set_power(true);
  59 }
  60
  61 static irqreturn_t wl12xx_irq(int irq, void *cookie)
  62 {
  63         struct wl12xx *wl;
  64
  65         wl12xx_debug(DEBUG_IRQ, "IRQ");
  66
  67         wl = cookie;
  68
  69         schedule_work(&wl->irq_work);
  70
  71         return IRQ_HANDLED;
  72 }
  73
  74 static int wl12xx_fetch_firmware(struct wl12xx *wl)
  75 {
  76         const struct firmware *fw;
  77         int ret;
  78
  79         ret = request_firmware(&fw, wl->chip.fw_filename, &wl->spi->dev);
  80
  81         if (ret < 0) {
  82                 wl12xx_error("could not get firmware: %d", ret);
  83                 return ret;
  84         }
  85
  86         if (fw->size % 4) {
  87                 wl12xx_error("firmware size is not multiple of 32 bits: %zu",
  88                              fw->size);
  89                 ret = -EILSEQ;
  90                 goto out;
  91         }
  92
  93         wl->fw_len = fw->size;
  94         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
  95
  96         if (!wl->fw) {
  97                 wl12xx_error("could not allocate memory for the firmware");
  98                 ret = -ENOMEM;
  99                 goto out;
 100         }
 101
 102         memcpy(wl->fw, fw->data, wl->fw_len);
 103
 104         ret = 0;
 105
 106 out:
 107         release_firmware(fw);
 108
 109         return ret;
 110 }
 111
 112 static int wl12xx_fetch_nvs(struct wl12xx *wl)
 113 {
 114         const struct firmware *fw;
 115         int ret;
 116
 117         ret = request_firmware(&fw, wl->chip.nvs_filename, &wl->spi->dev);
 118
 119         if (ret < 0) {
 120                 wl12xx_error("could not get nvs file: %d", ret);
 121                 return ret;
 122         }
 123
 124         if (fw->size % 4) {
 125                 wl12xx_error("nvs size is not multiple of 32 bits: %zu",
 126                              fw->size);
 127                 ret = -EILSEQ;
 128                 goto out;
 129         }
 130
 131         wl->nvs_len = fw->size;
 132         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 133
 134         if (!wl->nvs) {
 135                 wl12xx_error("could not allocate memory for the nvs file");
 136                 ret = -ENOMEM;
 137                 goto out;
 138         }
 139
 140         memcpy(wl->nvs, fw->data, wl->nvs_len);
 141
 142         ret = 0;
 143
 144 out:
 145         release_firmware(fw);
 146
 147         return ret;
 148 }
 149
 150 static void wl12xx_fw_wakeup(struct wl12xx *wl)
 151 {
 152         u32 elp_reg;
 153
 154         elp_reg = ELPCTRL_WAKE_UP;
 155         wl12xx_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 156         elp_reg = wl12xx_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 157
 158         if (!(elp_reg & ELPCTRL_WLAN_READY)) {
 159                 wl12xx_warning("WLAN not ready");
 160         }
 161 }
 162
 163 static int wl12xx_chip_wakeup(struct wl12xx *wl)
 164 {
 165         int ret = 0;
 166
 167         wl12xx_power_on(wl);
 168         msleep(wl->chip.power_on_sleep);
 169         wl12xx_spi_reset(wl);
 170         wl12xx_spi_init(wl);
 171
 172         /* We don't need a real memory partition here, because we only want
 173          * to use the registers at this point. */
 174         wl12xx_set_partition(wl,
 175                              0x00000000,
 176                              0x00000000,
 177                              REGISTERS_BASE,
 178                              REGISTERS_DOWN_SIZE);
 179
 180         /* ELP module wake up */
 181         wl12xx_fw_wakeup(wl);
 182
 183         /* whal_FwCtrl_BootSm() */
 184
 185         /* 0. read chip id from CHIP_ID */
 186         wl->chip.id = wl12xx_reg_read32(wl, CHIP_ID_B);
 187
 188         /* 1. check if chip id is valid */
 189
 190         switch (wl->chip.id) {
 191         case CHIP_ID_1251_PG12:
 192                 wl12xx_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 193                              wl->chip.id);
 194
 195                 wl1251_setup(wl);
 196
 197                 break;
 198         case CHIP_ID_1251_PG10:
 199         case CHIP_ID_1251_PG11:
 200         default:
 201                 wl12xx_error("unsupported chip id: 0x%x", wl->chip.id);
 202                 ret = -ENODEV;
 203                 goto out;
 204         }
 205
 206         if (wl->fw == NULL) {
 207                 ret = wl12xx_fetch_firmware(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212         /* No NVS from netlink, try to get it from the filesystem */
 213         if (wl->nvs == NULL) {
 214                 ret = wl12xx_fetch_nvs(wl);
 215                 if (ret < 0)
 216                         goto out;
 217         }
 218
 219 out:
 220         return ret;
 221 }
 222
 223 static void wl12xx_filter_work(struct work_struct *work)
 224 {
 225         struct wl12xx *wl =
 226                 container_of(work, struct wl12xx, filter_work);
 227         int ret;
 228
 229         mutex_lock(&wl->mutex);
 230
 231         if (wl->state == WL12XX_STATE_OFF)
 232                 goto out;
 233
 234         ret = wl12xx_ps_elp_wakeup(wl);
 235         if (ret < 0)
 236                 goto out;
 237
 238         /* FIXME: replace the magic numbers with proper definitions */
 239         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 240         if (ret < 0)
 241                 goto out_sleep;
 242
 243 out_sleep:
 244         wl12xx_ps_elp_sleep(wl);
 245
 246 out:
 247         mutex_unlock(&wl->mutex);
 248 }
 249
 250 int wl12xx_plt_start(struct wl12xx *wl)
 251 {
 252         int ret;
 253
 254         wl12xx_notice("power up");
 255
 256         if (wl->state != WL12XX_STATE_OFF) {
 257                 wl12xx_error("cannot go into PLT state because not "
 258                              "in off state: %d", wl->state);
 259                 return -EBUSY;
 260         }
 261
 262         wl->state = WL12XX_STATE_PLT;
 263
 264         ret = wl12xx_chip_wakeup(wl);
 265         if (ret < 0)
 266                 return ret;
 267
 268         ret = wl->chip.op_boot(wl);
 269         if (ret < 0)
 270                 return ret;
 271
 272         wl12xx_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
 273
 274         ret = wl->chip.op_plt_init(wl);
 275         if (ret < 0)
 276                 return ret;
 277
 278         return 0;
 279 }
 280
 281 int wl12xx_plt_stop(struct wl12xx *wl)
 282 {
 283         wl12xx_notice("power down");
 284
 285         if (wl->state != WL12XX_STATE_PLT) {
 286                 wl12xx_error("cannot power down because not in PLT "
 287                              "state: %d", wl->state);
 288                 return -EBUSY;
 289         }
 290
 291         wl12xx_disable_interrupts(wl);
 292         wl12xx_power_off(wl);
 293
 294         wl->state = WL12XX_STATE_OFF;
 295
 296         return 0;
 297 }
 298
 299
 300 static int wl12xx_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 301 {
 302         struct wl12xx *wl = hw->priv;
 303
 304         skb_queue_tail(&wl->tx_queue, skb);
 305
 306         /*
 307          * The chip specific setup must run before the first TX packet -
 308          * before that, the tx_work will not be initialized!
 309          */
 310
 311         schedule_work(&wl->tx_work);
 312
 313         /*
 314          * The workqueue is slow to process the tx_queue and we need stop
 315          * the queue here, otherwise the queue will get too long.
 316          */
 317         if (skb_queue_len(&wl->tx_queue) >= WL12XX_TX_QUEUE_MAX_LENGTH) {
 318                 ieee80211_stop_queues(wl->hw);
 319
 320                 /*
 321                  * FIXME: this is racy, the variable is not properly
 322                  * protected. Maybe fix this by removing the stupid
 323                  * variable altogether and checking the real queue state?
 324                  */
 325                 wl->tx_queue_stopped = true;
 326         }
 327
 328         return NETDEV_TX_OK;
 329 }
 330
 331 static int wl12xx_op_start(struct ieee80211_hw *hw)
 332 {
 333         struct wl12xx *wl = hw->priv;
 334         int ret = 0;
 335
 336         wl12xx_debug(DEBUG_MAC80211, "mac80211 start");
 337
 338         mutex_lock(&wl->mutex);
 339
 340         if (wl->state != WL12XX_STATE_OFF) {
 341                 wl12xx_error("cannot start because not in off state: %d",
 342                              wl->state);
 343                 ret = -EBUSY;
 344                 goto out;
 345         }
 346
 347         ret = wl12xx_chip_wakeup(wl);
 348         if (ret < 0)
 349                 return ret;
 350
 351         ret = wl->chip.op_boot(wl);
 352         if (ret < 0)
 353                 goto out;
 354
 355         ret = wl->chip.op_hw_init(wl);
 356         if (ret < 0)
 357                 goto out;
 358
 359         ret = wl12xx_acx_station_id(wl);
 360         if (ret < 0)
 361                 goto out;
 362
 363         wl->state = WL12XX_STATE_ON;
 364
 365         wl12xx_info("firmware booted (%s)", wl->chip.fw_ver);
 366
 367 out:
 368         if (ret < 0)
 369                 wl12xx_power_off(wl);
 370
 371         mutex_unlock(&wl->mutex);
 372
 373         return ret;
 374 }
 375
 376 static void wl12xx_op_stop(struct ieee80211_hw *hw)
 377 {
 378         struct wl12xx *wl = hw->priv;
 379
 380         wl12xx_info("down");
 381
 382         wl12xx_debug(DEBUG_MAC80211, "mac80211 stop");
 383
 384         mutex_lock(&wl->mutex);
 385
 386         WARN_ON(wl->state != WL12XX_STATE_ON);
 387
 388         if (wl->scanning) {
 389                 mutex_unlock(&wl->mutex);
 390                 ieee80211_scan_completed(wl->hw, true);
 391                 mutex_lock(&wl->mutex);
 392                 wl->scanning = false;
 393         }
 394
 395         wl->state = WL12XX_STATE_OFF;
 396
 397         wl12xx_disable_interrupts(wl);
 398
 399         mutex_unlock(&wl->mutex);
 400
 401         cancel_work_sync(&wl->irq_work);
 402         cancel_work_sync(&wl->tx_work);
 403         cancel_work_sync(&wl->filter_work);
 404
 405         mutex_lock(&wl->mutex);
 406
 407         /* let's notify MAC80211 about the remaining pending TX frames */
 408         wl->chip.op_tx_flush(wl);
 409         wl12xx_power_off(wl);
 410
 411         memset(wl->bssid, 0, ETH_ALEN);
 412         wl->listen_int = 1;
 413         wl->bss_type = MAX_BSS_TYPE;
 414
 415         wl->data_in_count = 0;
 416         wl->rx_counter = 0;
 417         wl->rx_handled = 0;
 418         wl->rx_current_buffer = 0;
 419         wl->rx_last_id = 0;
 420         wl->next_tx_complete = 0;
 421         wl->elp = false;
 422         wl->psm = 0;
 423         wl->tx_queue_stopped = false;
 424         wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
 425
 426         wl12xx_debugfs_reset(wl);
 427
 428         mutex_unlock(&wl->mutex);
 429 }
 430
 431 static int wl12xx_op_add_interface(struct ieee80211_hw *hw,
 432                                    struct ieee80211_if_init_conf *conf)
 433 {
 434         struct wl12xx *wl = hw->priv;
 435         DECLARE_MAC_BUF(mac);
 436         int ret = 0;
 437
 438         wl12xx_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s",
 439                      conf->type, print_mac(mac, conf->mac_addr));
 440
 441         mutex_lock(&wl->mutex);
 442
 443         switch (conf->type) {
 444         case NL80211_IFTYPE_STATION:
 445                 wl->bss_type = BSS_TYPE_STA_BSS;
 446                 break;
 447         case NL80211_IFTYPE_ADHOC:
 448                 wl->bss_type = BSS_TYPE_IBSS;
 449                 break;
 450         default:
 451                 ret = -EOPNOTSUPP;
 452                 goto out;
 453         }
 454
 455         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 456                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 457                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 458                 ret = wl12xx_acx_station_id(wl);
 459                 if (ret < 0)
 460                         goto out;
 461         }
 462
 463 out:
 464         mutex_unlock(&wl->mutex);
 465         return ret;
 466 }
 467
 468 static void wl12xx_op_remove_interface(struct ieee80211_hw *hw,
 469                                          struct ieee80211_if_init_conf *conf)
 470 {
 471         wl12xx_debug(DEBUG_MAC80211, "mac80211 remove interface");
 472 }
 473
 474 static int wl12xx_build_null_data(struct wl12xx *wl)
 475 {
 476         struct wl12xx_null_data_template template;
 477
 478         if (!is_zero_ether_addr(wl->bssid)) {
 479                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 480                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 481         } else {
 482                 memset(template.header.da, 0xff, ETH_ALEN);
 483                 memset(template.header.bssid, 0xff, ETH_ALEN);
 484         }
 485
 486         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 487         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 488                                                 IEEE80211_STYPE_NULLFUNC);
 489
 490         return wl12xx_cmd_template_set(wl, CMD_NULL_DATA, &template,
 491                                        sizeof(template));
 492
 493 }
 494
 495 static int wl12xx_build_ps_poll(struct wl12xx *wl, u16 aid)
 496 {
 497         struct wl12xx_ps_poll_template template;
 498
 499         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 500         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 501         template.aid = aid;
 502         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 503
 504         return wl12xx_cmd_template_set(wl, CMD_PS_POLL, &template,
 505                                        sizeof(template));
 506
 507 }
 508
 509 static int wl12xx_op_config(struct ieee80211_hw *hw, u32 changed)
 510 {
 511         struct wl12xx *wl = hw->priv;
 512         struct ieee80211_conf *conf = &hw->conf;
 513         int channel, ret = 0;
 514
 515         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 516
 517         wl12xx_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 518                      channel,
 519                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 520                      conf->power_level);
 521
 522         mutex_lock(&wl->mutex);
 523
 524         ret = wl12xx_ps_elp_wakeup(wl);
 525         if (ret < 0)
 526                 goto out;
 527
 528         if (channel != wl->channel) {
 529                 /* FIXME: use beacon interval provided by mac80211 */
 530                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 531                 if (ret < 0)
 532                         goto out_sleep;
 533
 534                 wl->channel = channel;
 535         }
 536
 537         ret = wl12xx_build_null_data(wl);
 538         if (ret < 0)
 539                 goto out_sleep;
 540
 541         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 542                 wl12xx_info("psm enabled");
 543
 544                 wl->psm_requested = true;
 545
 546                 /*
 547                  * We enter PSM only if we're already associated.
 548                  * If we're not, we'll enter it when joining an SSID,
 549                  * through the bss_info_changed() hook.
 550                  */
 551                 ret = wl12xx_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 552         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 553                    wl->psm_requested) {
 554                 wl12xx_info("psm disabled");
 555
 556                 wl->psm_requested = false;
 557
 558                 if (wl->psm)
 559                         ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE);
 560         }
 561
 562         if (conf->power_level != wl->power_level) {
 563                 ret = wl12xx_acx_tx_power(wl, conf->power_level);
 564                 if (ret < 0)
 565                         goto out;
 566
 567                 wl->power_level = conf->power_level;
 568         }
 569
 570 out_sleep:
 571         wl12xx_ps_elp_sleep(wl);
 572
 573 out:
 574         mutex_unlock(&wl->mutex);
 575
 576         return ret;
 577 }
 578
 579 #define WL12XX_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 580                                   FIF_ALLMULTI | \
 581                                   FIF_FCSFAIL | \
 582                                   FIF_BCN_PRBRESP_PROMISC | \
 583                                   FIF_CONTROL | \
 584                                   FIF_OTHER_BSS)
 585
 586 static void wl12xx_op_configure_filter(struct ieee80211_hw *hw,
 587                                        unsigned int changed,
 588                                        unsigned int *total,
 589                                        int mc_count,
 590                                        struct dev_addr_list *mc_list)
 591 {
 592         struct wl12xx *wl = hw->priv;
 593
 594         wl12xx_debug(DEBUG_MAC80211, "mac80211 configure filter");
 595
 596         *total &= WL12XX_SUPPORTED_FILTERS;
 597         changed &= WL12XX_SUPPORTED_FILTERS;
 598
 599         if (changed == 0)
 600                 /* no filters which we support changed */
 601                 return;
 602
 603         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 604
 605         wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
 606         wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
 607
 608         if (*total & FIF_PROMISC_IN_BSS) {
 609                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 610                 wl->rx_config |= CFG_RX_ALL_GOOD;
 611         }
 612         if (*total & FIF_ALLMULTI)
 613                 /*
 614                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 615                  * all multicast frames
 616                  */
 617                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 618         if (*total & FIF_FCSFAIL)
 619                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 620         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 621                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 622                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 623         }
 624         if (*total & FIF_CONTROL)
 625                 wl->rx_filter |= CFG_RX_CTL_EN;
 626         if (*total & FIF_OTHER_BSS)
 627                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 628
 629         /*
 630          * FIXME: workqueues need to be properly cancelled on stop(), for
 631          * now let's just disable changing the filter settings. They will
 632          * be updated any on config().
 633          */
 634         /* schedule_work(&wl->filter_work); */
 635 }
 636
 637 /* HW encryption */
 638 static int wl12xx_set_key_type(struct wl12xx *wl,
 639                                struct wl12xx_cmd_set_keys *key,
 640                                enum set_key_cmd cmd,
 641                                struct ieee80211_key_conf *mac80211_key,
 642                                const u8 *addr)
 643 {
 644         switch (mac80211_key->alg) {
 645         case ALG_WEP:
 646                 if (is_broadcast_ether_addr(addr))
 647                         key->key_type = KEY_WEP_DEFAULT;
 648                 else
 649                         key->key_type = KEY_WEP_ADDR;
 650
 651                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 652                 break;
 653         case ALG_TKIP:
 654                 if (is_broadcast_ether_addr(addr))
 655                         key->key_type = KEY_TKIP_MIC_GROUP;
 656                 else
 657                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 658
 659                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 660                 break;
 661         case ALG_CCMP:
 662                 if (is_broadcast_ether_addr(addr))
 663                         key->key_type = KEY_AES_GROUP;
 664                 else
 665                         key->key_type = KEY_AES_PAIRWISE;
 666                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 667                 break;
 668         default:
 669                 wl12xx_error("Unknown key algo 0x%x", mac80211_key->alg);
 670                 return -EOPNOTSUPP;
 671         }
 672
 673         return 0;
 674 }
 675
 676 static int wl12xx_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 677                              struct ieee80211_vif *vif,
 678                              struct ieee80211_sta *sta,
 679                              struct ieee80211_key_conf *key)
 680 {
 681         struct wl12xx *wl = hw->priv;
 682         struct wl12xx_cmd_set_keys *wl_cmd;
 683         const u8 *addr;
 684         int ret;
 685
 686         static const u8 bcast_addr[ETH_ALEN] =
 687                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 688
 689         wl12xx_debug(DEBUG_MAC80211, "mac80211 set key");
 690
 691         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 692         if (!wl_cmd) {
 693                 ret = -ENOMEM;
 694                 goto out;
 695         }
 696
 697         addr = sta ? sta->addr : bcast_addr;
 698
 699         wl12xx_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 700         wl12xx_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 701         wl12xx_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 702                      key->alg, key->keyidx, key->keylen, key->flags);
 703         wl12xx_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 704
 705         if (is_zero_ether_addr(addr)) {
 706                 /* We dont support TX only encryption */
 707                 ret = -EOPNOTSUPP;
 708                 goto out;
 709         }
 710
 711         mutex_lock(&wl->mutex);
 712
 713         ret = wl12xx_ps_elp_wakeup(wl);
 714         if (ret < 0)
 715                 goto out_unlock;
 716
 717         switch (cmd) {
 718         case SET_KEY:
 719                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 720                 break;
 721         case DISABLE_KEY:
 722                 wl_cmd->key_action = KEY_REMOVE;
 723                 break;
 724         default:
 725                 wl12xx_error("Unsupported key cmd 0x%x", cmd);
 726                 break;
 727         }
 728
 729         ret = wl12xx_set_key_type(wl, wl_cmd, cmd, key, addr);
 730         if (ret < 0) {
 731                 wl12xx_error("Set KEY type failed");
 732                 goto out_sleep;
 733         }
 734
 735         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 736                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 737
 738         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 739             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 740                 /*
 741                  * We get the key in the following form:
 742                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 743                  * but the target is expecting:
 744                  * TKIP - RX MIC - TX MIC
 745                  */
 746                 memcpy(wl_cmd->key, key->key, 16);
 747                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 748                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 749
 750         } else {
 751                 memcpy(wl_cmd->key, key->key, key->keylen);
 752         }
 753         wl_cmd->key_size = key->keylen;
 754
 755         wl_cmd->id = key->keyidx;
 756         wl_cmd->ssid_profile = 0;
 757
 758         wl12xx_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 759
 760         ret = wl12xx_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 761         if (ret < 0) {
 762                 wl12xx_warning("could not set keys");
 763                 goto out_sleep;
 764         }
 765
 766 out_sleep:
 767         wl12xx_ps_elp_sleep(wl);
 768
 769 out_unlock:
 770         mutex_unlock(&wl->mutex);
 771
 772 out:
 773         kfree(wl_cmd);
 774
 775         return ret;
 776 }
 777
 778 static int wl12xx_build_basic_rates(char *rates)
 779 {
 780         u8 index = 0;
 781
 782         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 783         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 784         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 785         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 786
 787         return index;
 788 }
 789
 790 static int wl12xx_build_extended_rates(char *rates)
 791 {
 792         u8 index = 0;
 793
 794         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 795         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 796         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 797         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 798         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 799         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 800         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 801         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 802
 803         return index;
 804 }
 805
 806
 807 static int wl12xx_build_probe_req(struct wl12xx *wl, u8 *ssid, size_t ssid_len)
 808 {
 809         struct wl12xx_probe_req_template template;
 810         struct wl12xx_ie_rates *rates;
 811         char *ptr;
 812         u16 size;
 813
 814         ptr = (char *)&template;
 815         size = sizeof(struct ieee80211_header);
 816
 817         memset(template.header.da, 0xff, ETH_ALEN);
 818         memset(template.header.bssid, 0xff, ETH_ALEN);
 819         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 820         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 821
 822         /* IEs */
 823         /* SSID */
 824         template.ssid.header.id = WLAN_EID_SSID;
 825         template.ssid.header.len = ssid_len;
 826         if (ssid_len && ssid)
 827                 memcpy(template.ssid.ssid, ssid, ssid_len);
 828         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 829         ptr += size;
 830
 831         /* Basic Rates */
 832         rates = (struct wl12xx_ie_rates *)ptr;
 833         rates->header.id = WLAN_EID_SUPP_RATES;
 834         rates->header.len = wl12xx_build_basic_rates(rates->rates);
 835         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 836         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 837
 838         /* Extended rates */
 839         rates = (struct wl12xx_ie_rates *)ptr;
 840         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 841         rates->header.len = wl12xx_build_extended_rates(rates->rates);
 842         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 843
 844         wl12xx_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 845
 846         return wl12xx_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 847                                       size);
 848 }
 849
 850 static int wl12xx_hw_scan(struct wl12xx *wl, u8 *ssid, size_t len,
 851                           u8 active_scan, u8 high_prio, u8 num_channels,
 852                           u8 probe_requests)
 853 {
 854         struct wl12xx_cmd_trigger_scan_to *trigger = NULL;
 855         struct cmd_scan *params = NULL;
 856         int i, ret;
 857         u16 scan_options = 0;
 858
 859         if (wl->scanning)
 860                 return -EINVAL;
 861
 862         params = kzalloc(sizeof(*params), GFP_KERNEL);
 863         if (!params)
 864                 return -ENOMEM;
 865
 866         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 867         params->params.rx_filter_options =
 868                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 869
 870         /* High priority scan */
 871         if (!active_scan)
 872                 scan_options |= SCAN_PASSIVE;
 873         if (high_prio)
 874                 scan_options |= SCAN_PRIORITY_HIGH;
 875         params->params.scan_options = scan_options;
 876
 877         params->params.num_channels = num_channels;
 878         params->params.num_probe_requests = probe_requests;
 879         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 880         params->params.tid_trigger = 0;
 881
 882         for (i = 0; i < num_channels; i++) {
 883                 params->channels[i].min_duration = cpu_to_le32(30000);
 884                 params->channels[i].max_duration = cpu_to_le32(60000);
 885                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 886                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 887                 params->channels[i].early_termination = 0;
 888                 params->channels[i].tx_power_att = 0;
 889                 params->channels[i].channel = i + 1;
 890                 memset(params->channels[i].pad, 0, 3);
 891         }
 892
 893         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 894                 memset(&params->channels[i], 0,
 895                        sizeof(struct basic_scan_channel_parameters));
 896
 897         if (len && ssid) {
 898                 params->params.ssid_len = len;
 899                 memcpy(params->params.ssid, ssid, len);
 900         } else {
 901                 params->params.ssid_len = 0;
 902                 memset(params->params.ssid, 0, 32);
 903         }
 904
 905         ret = wl12xx_build_probe_req(wl, ssid, len);
 906         if (ret < 0) {
 907                 wl12xx_error("PROBE request template failed");
 908                 goto out;
 909         }
 910
 911         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 912         if (!trigger)
 913                 goto out;
 914
 915         trigger->timeout = 0;
 916
 917         ret = wl12xx_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 918                               sizeof(*trigger));
 919         if (ret < 0) {
 920                 wl12xx_error("trigger scan to failed for hw scan");
 921                 goto out;
 922         }
 923
 924         wl12xx_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 925
 926         wl->scanning = true;
 927
 928         ret = wl12xx_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 929         if (ret < 0)
 930                 wl12xx_error("SCAN failed");
 931
 932         wl12xx_spi_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
 933
 934         if (params->header.status != CMD_STATUS_SUCCESS) {
 935                 wl12xx_error("TEST command answer error: %d",
 936                              params->header.status);
 937                 wl->scanning = false;
 938                 ret = -EIO;
 939                 goto out;
 940         }
 941
 942 out:
 943         kfree(params);
 944         return ret;
 945
 946 }
 947
 948 static int wl12xx_op_hw_scan(struct ieee80211_hw *hw,
 949                              struct cfg80211_scan_request *req)
 950 {
 951         struct wl12xx *wl = hw->priv;
 952         int ret;
 953         u8 *ssid = NULL;
 954         size_t ssid_len = 0;
 955
 956         wl12xx_debug(DEBUG_MAC80211, "mac80211 hw scan");
 957
 958         if (req->n_ssids) {
 959                 ssid = req->ssids[0].ssid;
 960                 ssid_len = req->ssids[0].ssid_len;
 961         }
 962
 963         mutex_lock(&wl->mutex);
 964
 965         ret = wl12xx_ps_elp_wakeup(wl);
 966         if (ret < 0)
 967                 goto out;
 968
 969         ret = wl12xx_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 970
 971         wl12xx_ps_elp_sleep(wl);
 972
 973 out:
 974         mutex_unlock(&wl->mutex);
 975
 976         return ret;
 977 }
 978
 979 static int wl12xx_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 980 {
 981         struct wl12xx *wl = hw->priv;
 982         int ret;
 983
 984         mutex_lock(&wl->mutex);
 985
 986         ret = wl12xx_ps_elp_wakeup(wl);
 987         if (ret < 0)
 988                 goto out;
 989
 990         ret = wl12xx_acx_rts_threshold(wl, (u16) value);
 991         if (ret < 0)
 992                 wl12xx_warning("wl12xx_op_set_rts_threshold failed: %d", ret);
 993
 994         wl12xx_ps_elp_sleep(wl);
 995
 996 out:
 997         mutex_unlock(&wl->mutex);
 998
 999         return ret;
1000 }
1001
1002 static void wl12xx_op_bss_info_changed(struct ieee80211_hw *hw,
1003                                        struct ieee80211_vif *vif,
1004                                        struct ieee80211_bss_conf *bss_conf,
1005                                        u32 changed)
1006 {
1007         enum wl12xx_cmd_ps_mode mode;
1008         struct wl12xx *wl = hw->priv;
1009         struct sk_buff *beacon;
1010         int ret;
1011
1012         wl12xx_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1013
1014         mutex_lock(&wl->mutex);
1015
1016         ret = wl12xx_ps_elp_wakeup(wl);
1017         if (ret < 0)
1018                 goto out;
1019
1020         if (changed & BSS_CHANGED_ASSOC) {
1021                 if (bss_conf->assoc) {
1022                         wl->aid = bss_conf->aid;
1023
1024                         ret = wl12xx_build_ps_poll(wl, wl->aid);
1025                         if (ret < 0)
1026                                 goto out_sleep;
1027
1028                         ret = wl12xx_acx_aid(wl, wl->aid);
1029                         if (ret < 0)
1030                                 goto out_sleep;
1031
1032                         /* If we want to go in PSM but we're not there yet */
1033                         if (wl->psm_requested && !wl->psm) {
1034                                 mode = STATION_POWER_SAVE_MODE;
1035                                 ret = wl12xx_ps_set_mode(wl, mode);
1036                                 if (ret < 0)
1037                                         goto out_sleep;
1038                         }
1039                 }
1040         }
1041         if (changed & BSS_CHANGED_ERP_SLOT) {
1042                 if (bss_conf->use_short_slot)
1043                         ret = wl12xx_acx_slot(wl, SLOT_TIME_SHORT);
1044                 else
1045                         ret = wl12xx_acx_slot(wl, SLOT_TIME_LONG);
1046                 if (ret < 0) {
1047                         wl12xx_warning("Set slot time failed %d", ret);
1048                         goto out_sleep;
1049                 }
1050         }
1051
1052         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1053                 if (bss_conf->use_short_preamble)
1054                         wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1055                 else
1056                         wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1057         }
1058
1059         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1060                 if (bss_conf->use_cts_prot)
1061                         ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1062                 else
1063                         ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1064                 if (ret < 0) {
1065                         wl12xx_warning("Set ctsprotect failed %d", ret);
1066                         goto out_sleep;
1067                 }
1068         }
1069
1070         if (changed & BSS_CHANGED_BSSID) {
1071                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1072
1073                 ret = wl12xx_build_null_data(wl);
1074                 if (ret < 0)
1075                         goto out;
1076
1077                 if (wl->bss_type != BSS_TYPE_IBSS) {
1078                         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 5, 100, 1);
1079                         if (ret < 0)
1080                                 goto out;
1081                 }
1082         }
1083
1084         if (changed & BSS_CHANGED_BEACON) {
1085                 beacon = ieee80211_beacon_get(hw, vif);
1086                 ret = wl12xx_cmd_template_set(wl, CMD_BEACON, beacon->data,
1087                                               beacon->len);
1088
1089                 if (ret < 0) {
1090                         dev_kfree_skb(beacon);
1091                         goto out;
1092                 }
1093
1094                 ret = wl12xx_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1095                                               beacon->len);
1096
1097                 dev_kfree_skb(beacon);
1098
1099                 if (ret < 0)
1100                         goto out;
1101
1102                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
1103
1104                 if (ret < 0)
1105                         goto out;
1106         }
1107
1108 out_sleep:
1109         wl12xx_ps_elp_sleep(wl);
1110
1111 out:
1112         mutex_unlock(&wl->mutex);
1113 }
1114
1115
1116 /* can't be const, mac80211 writes to this */
1117 static struct ieee80211_rate wl12xx_rates[] = {
1118         { .bitrate = 10,
1119           .hw_value = 0x1,
1120           .hw_value_short = 0x1, },
1121         { .bitrate = 20,
1122           .hw_value = 0x2,
1123           .hw_value_short = 0x2,
1124           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1125         { .bitrate = 55,
1126           .hw_value = 0x4,
1127           .hw_value_short = 0x4,
1128           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1129         { .bitrate = 110,
1130           .hw_value = 0x20,
1131           .hw_value_short = 0x20,
1132           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1133         { .bitrate = 60,
1134           .hw_value = 0x8,
1135           .hw_value_short = 0x8, },
1136         { .bitrate = 90,
1137           .hw_value = 0x10,
1138           .hw_value_short = 0x10, },
1139         { .bitrate = 120,
1140           .hw_value = 0x40,
1141           .hw_value_short = 0x40, },
1142         { .bitrate = 180,
1143           .hw_value = 0x80,
1144           .hw_value_short = 0x80, },
1145         { .bitrate = 240,
1146           .hw_value = 0x200,
1147           .hw_value_short = 0x200, },
1148         { .bitrate = 360,
1149          .hw_value = 0x400,
1150          .hw_value_short = 0x400, },
1151         { .bitrate = 480,
1152           .hw_value = 0x800,
1153           .hw_value_short = 0x800, },
1154         { .bitrate = 540,
1155           .hw_value = 0x1000,
1156           .hw_value_short = 0x1000, },
1157 };
1158
1159 /* can't be const, mac80211 writes to this */
1160 static struct ieee80211_channel wl12xx_channels[] = {
1161         { .hw_value = 1, .center_freq = 2412},
1162         { .hw_value = 2, .center_freq = 2417},
1163         { .hw_value = 3, .center_freq = 2422},
1164         { .hw_value = 4, .center_freq = 2427},
1165         { .hw_value = 5, .center_freq = 2432},
1166         { .hw_value = 6, .center_freq = 2437},
1167         { .hw_value = 7, .center_freq = 2442},
1168         { .hw_value = 8, .center_freq = 2447},
1169         { .hw_value = 9, .center_freq = 2452},
1170         { .hw_value = 10, .center_freq = 2457},
1171         { .hw_value = 11, .center_freq = 2462},
1172         { .hw_value = 12, .center_freq = 2467},
1173         { .hw_value = 13, .center_freq = 2472},
1174 };
1175
1176 /* can't be const, mac80211 writes to this */
1177 static struct ieee80211_supported_band wl12xx_band_2ghz = {
1178         .channels = wl12xx_channels,
1179         .n_channels = ARRAY_SIZE(wl12xx_channels),
1180         .bitrates = wl12xx_rates,
1181         .n_bitrates = ARRAY_SIZE(wl12xx_rates),
1182 };
1183
1184 static const struct ieee80211_ops wl12xx_ops = {
1185         .start = wl12xx_op_start,
1186         .stop = wl12xx_op_stop,
1187         .add_interface = wl12xx_op_add_interface,
1188         .remove_interface = wl12xx_op_remove_interface,
1189         .config = wl12xx_op_config,
1190         .configure_filter = wl12xx_op_configure_filter,
1191         .tx = wl12xx_op_tx,
1192         .set_key = wl12xx_op_set_key,
1193         .hw_scan = wl12xx_op_hw_scan,
1194         .bss_info_changed = wl12xx_op_bss_info_changed,
1195         .set_rts_threshold = wl12xx_op_set_rts_threshold,
1196 };
1197
1198 static int wl12xx_register_hw(struct wl12xx *wl)
1199 {
1200         int ret;
1201
1202         if (wl->mac80211_registered)
1203                 return 0;
1204
1205         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1206
1207         ret = ieee80211_register_hw(wl->hw);
1208         if (ret < 0) {
1209                 wl12xx_error("unable to register mac80211 hw: %d", ret);
1210                 return ret;
1211         }
1212
1213         wl->mac80211_registered = true;
1214
1215         wl12xx_notice("loaded");
1216
1217         return 0;
1218 }
1219
1220 static int wl12xx_init_ieee80211(struct wl12xx *wl)
1221 {
1222         /* The tx descriptor buffer and the TKIP space */
1223         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1224                 + WL1251_TKIP_IV_SPACE;
1225
1226         /* unit us */
1227         /* FIXME: find a proper value */
1228         wl->hw->channel_change_time = 10000;
1229
1230         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1231                 IEEE80211_HW_NOISE_DBM;
1232
1233         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1234         wl->hw->wiphy->max_scan_ssids = 1;
1235         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl12xx_band_2ghz;
1236
1237         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1238
1239         return 0;
1240 }
1241
1242 #define WL12XX_DEFAULT_CHANNEL 1
1243 static int __devinit wl12xx_probe(struct spi_device *spi)
1244 {
1245         struct wl12xx_platform_data *pdata;
1246         struct ieee80211_hw *hw;
1247         struct wl12xx *wl;
1248         int ret, i;
1249         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1250
1251         pdata = spi->dev.platform_data;
1252         if (!pdata) {
1253                 wl12xx_error("no platform data");
1254                 return -ENODEV;
1255         }
1256
1257         hw = ieee80211_alloc_hw(sizeof(*wl), &wl12xx_ops);
1258         if (!hw) {
1259                 wl12xx_error("could not alloc ieee80211_hw");
1260                 return -ENOMEM;
1261         }
1262
1263         wl = hw->priv;
1264         memset(wl, 0, sizeof(*wl));
1265
1266         wl->hw = hw;
1267         dev_set_drvdata(&spi->dev, wl);
1268         wl->spi = spi;
1269
1270         wl->data_in_count = 0;
1271
1272         skb_queue_head_init(&wl->tx_queue);
1273
1274         INIT_WORK(&wl->filter_work, wl12xx_filter_work);
1275         wl->channel = WL12XX_DEFAULT_CHANNEL;
1276         wl->scanning = false;
1277         wl->default_key = 0;
1278         wl->listen_int = 1;
1279         wl->rx_counter = 0;
1280         wl->rx_handled = 0;
1281         wl->rx_current_buffer = 0;
1282         wl->rx_last_id = 0;
1283         wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
1284         wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
1285         wl->elp = false;
1286         wl->psm = 0;
1287         wl->psm_requested = false;
1288         wl->tx_queue_stopped = false;
1289         wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
1290
1291         /* We use the default power on sleep time until we know which chip
1292          * we're using */
1293         wl->chip.power_on_sleep = WL12XX_DEFAULT_POWER_ON_SLEEP;
1294
1295         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1296                 wl->tx_frames[i] = NULL;
1297
1298         wl->next_tx_complete = 0;
1299
1300         /*
1301          * In case our MAC address is not correctly set,
1302          * we use a random but Nokia MAC.
1303          */
1304         memcpy(wl->mac_addr, nokia_oui, 3);
1305         get_random_bytes(wl->mac_addr + 3, 3);
1306
1307         wl->state = WL12XX_STATE_OFF;
1308         mutex_init(&wl->mutex);
1309
1310         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1311         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1312
1313         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1314         if (!wl->rx_descriptor) {
1315                 wl12xx_error("could not allocate memory for rx descriptor");
1316                 ret = -ENOMEM;
1317                 goto out_free;
1318         }
1319
1320         /* This is the only SPI value that we need to set here, the rest
1321          * comes from the board-peripherals file */
1322         spi->bits_per_word = 32;
1323
1324         ret = spi_setup(spi);
1325         if (ret < 0) {
1326                 wl12xx_error("spi_setup failed");
1327                 goto out_free;
1328         }
1329
1330         wl->set_power = pdata->set_power;
1331         if (!wl->set_power) {
1332                 wl12xx_error("set power function missing in platform data");
1333                 ret = -ENODEV;
1334                 goto out_free;
1335         }
1336
1337         wl->irq = spi->irq;
1338         if (wl->irq < 0) {
1339                 wl12xx_error("irq missing in platform data");
1340                 ret = -ENODEV;
1341                 goto out_free;
1342         }
1343
1344         ret = request_irq(wl->irq, wl12xx_irq, 0, DRIVER_NAME, wl);
1345         if (ret < 0) {
1346                 wl12xx_error("request_irq() failed: %d", ret);
1347                 goto out_free;
1348         }
1349
1350         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1351
1352         disable_irq(wl->irq);
1353
1354         ret = wl12xx_init_ieee80211(wl);
1355         if (ret)
1356                 goto out_irq;
1357
1358         ret = wl12xx_register_hw(wl);
1359         if (ret)
1360                 goto out_irq;
1361
1362         wl12xx_debugfs_init(wl);
1363
1364         wl12xx_notice("initialized");
1365
1366         return 0;
1367
1368  out_irq:
1369         free_irq(wl->irq, wl);
1370
1371  out_free:
1372         kfree(wl->rx_descriptor);
1373         wl->rx_descriptor = NULL;
1374
1375         ieee80211_free_hw(hw);
1376
1377         return ret;
1378 }
1379
1380 static int __devexit wl12xx_remove(struct spi_device *spi)
1381 {
1382         struct wl12xx *wl = dev_get_drvdata(&spi->dev);
1383
1384         ieee80211_unregister_hw(wl->hw);
1385
1386         wl12xx_debugfs_exit(wl);
1387
1388         free_irq(wl->irq, wl);
1389         kfree(wl->target_mem_map);
1390         kfree(wl->data_path);
1391         kfree(wl->fw);
1392         wl->fw = NULL;
1393         kfree(wl->nvs);
1394         wl->nvs = NULL;
1395
1396         kfree(wl->rx_descriptor);
1397         wl->rx_descriptor = NULL;
1398
1399         ieee80211_free_hw(wl->hw);
1400
1401         return 0;
1402 }
1403
1404
1405 static struct spi_driver wl12xx_spi_driver = {
1406         .driver = {
1407                 .name           = "wl12xx",
1408                 .bus            = &spi_bus_type,
1409                 .owner          = THIS_MODULE,
1410         },
1411
1412         .probe          = wl12xx_probe,
1413         .remove         = __devexit_p(wl12xx_remove),
1414 };
1415
1416 static int __init wl12xx_init(void)
1417 {
1418         int ret;
1419
1420         ret = spi_register_driver(&wl12xx_spi_driver);
1421         if (ret < 0) {
1422                 wl12xx_error("failed to register spi driver: %d", ret);
1423                 goto out;
1424         }
1425
1426 out:
1427         return ret;
1428 }
1429
1430 static void __exit wl12xx_exit(void)
1431 {
1432         spi_unregister_driver(&wl12xx_spi_driver);
1433
1434         wl12xx_notice("unloaded");
1435 }
1436
1437 module_init(wl12xx_init);
1438 module_exit(wl12xx_exit);
1439
1440 MODULE_LICENSE("GPL");
1441 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>, "
1442                 "Luciano Coelho <luciano.coelho@nokia.com>");