drivers/net/wireless/wl12xx/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.h"
  38 #include "spi.h"
  39 #include "event.h"
  40 #include "wl1251_tx.h"
  41 #include "rx.h"
  42 #include "ps.h"
  43 #include "init.h"
  44 #include "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_1271_PG10:
 199                 wl12xx_warning("chip id 0x%x (1271 PG10) support is obsolete",
 200                                wl->chip.id);
 201                 break;
 202         case CHIP_ID_1271_PG20:
 203                 wl12xx_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
 204                              wl->chip.id);
 205                 break;
 206         case CHIP_ID_1251_PG10:
 207         case CHIP_ID_1251_PG11:
 208         default:
 209                 wl12xx_error("unsupported chip id: 0x%x", wl->chip.id);
 210                 ret = -ENODEV;
 211                 goto out;
 212         }
 213
 214         if (wl->fw == NULL) {
 215                 ret = wl12xx_fetch_firmware(wl);
 216                 if (ret < 0)
 217                         goto out;
 218         }
 219
 220         /* No NVS from netlink, try to get it from the filesystem */
 221         if (wl->nvs == NULL) {
 222                 ret = wl12xx_fetch_nvs(wl);
 223                 if (ret < 0)
 224                         goto out;
 225         }
 226
 227 out:
 228         return ret;
 229 }
 230
 231 static void wl12xx_filter_work(struct work_struct *work)
 232 {
 233         struct wl12xx *wl =
 234                 container_of(work, struct wl12xx, filter_work);
 235         int ret;
 236
 237         mutex_lock(&wl->mutex);
 238
 239         if (wl->state == WL12XX_STATE_OFF)
 240                 goto out;
 241
 242         ret = wl12xx_ps_elp_wakeup(wl);
 243         if (ret < 0)
 244                 goto out;
 245
 246         /* FIXME: replace the magic numbers with proper definitions */
 247         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 248         if (ret < 0)
 249                 goto out_sleep;
 250
 251 out_sleep:
 252         wl12xx_ps_elp_sleep(wl);
 253
 254 out:
 255         mutex_unlock(&wl->mutex);
 256 }
 257
 258 int wl12xx_plt_start(struct wl12xx *wl)
 259 {
 260         int ret;
 261
 262         wl12xx_notice("power up");
 263
 264         if (wl->state != WL12XX_STATE_OFF) {
 265                 wl12xx_error("cannot go into PLT state because not "
 266                              "in off state: %d", wl->state);
 267                 return -EBUSY;
 268         }
 269
 270         wl->state = WL12XX_STATE_PLT;
 271
 272         ret = wl12xx_chip_wakeup(wl);
 273         if (ret < 0)
 274                 return ret;
 275
 276         ret = wl->chip.op_boot(wl);
 277         if (ret < 0)
 278                 return ret;
 279
 280         wl12xx_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
 281
 282         ret = wl->chip.op_plt_init(wl);
 283         if (ret < 0)
 284                 return ret;
 285
 286         return 0;
 287 }
 288
 289 int wl12xx_plt_stop(struct wl12xx *wl)
 290 {
 291         wl12xx_notice("power down");
 292
 293         if (wl->state != WL12XX_STATE_PLT) {
 294                 wl12xx_error("cannot power down because not in PLT "
 295                              "state: %d", wl->state);
 296                 return -EBUSY;
 297         }
 298
 299         wl12xx_disable_interrupts(wl);
 300         wl12xx_power_off(wl);
 301
 302         wl->state = WL12XX_STATE_OFF;
 303
 304         return 0;
 305 }
 306
 307
 308 static int wl12xx_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 309 {
 310         struct wl12xx *wl = hw->priv;
 311
 312         skb_queue_tail(&wl->tx_queue, skb);
 313
 314         /*
 315          * The chip specific setup must run before the first TX packet -
 316          * before that, the tx_work will not be initialized!
 317          */
 318
 319         schedule_work(&wl->tx_work);
 320
 321         /*
 322          * The workqueue is slow to process the tx_queue and we need stop
 323          * the queue here, otherwise the queue will get too long.
 324          */
 325         if (skb_queue_len(&wl->tx_queue) >= WL12XX_TX_QUEUE_MAX_LENGTH) {
 326                 ieee80211_stop_queues(wl->hw);
 327
 328                 /*
 329                  * FIXME: this is racy, the variable is not properly
 330                  * protected. Maybe fix this by removing the stupid
 331                  * variable altogether and checking the real queue state?
 332                  */
 333                 wl->tx_queue_stopped = true;
 334         }
 335
 336         return NETDEV_TX_OK;
 337 }
 338
 339 static int wl12xx_op_start(struct ieee80211_hw *hw)
 340 {
 341         struct wl12xx *wl = hw->priv;
 342         int ret = 0;
 343
 344         wl12xx_debug(DEBUG_MAC80211, "mac80211 start");
 345
 346         mutex_lock(&wl->mutex);
 347
 348         if (wl->state != WL12XX_STATE_OFF) {
 349                 wl12xx_error("cannot start because not in off state: %d",
 350                              wl->state);
 351                 ret = -EBUSY;
 352                 goto out;
 353         }
 354
 355         ret = wl12xx_chip_wakeup(wl);
 356         if (ret < 0)
 357                 return ret;
 358
 359         ret = wl->chip.op_boot(wl);
 360         if (ret < 0)
 361                 goto out;
 362
 363         ret = wl->chip.op_hw_init(wl);
 364         if (ret < 0)
 365                 goto out;
 366
 367         ret = wl12xx_acx_station_id(wl);
 368         if (ret < 0)
 369                 goto out;
 370
 371         wl->state = WL12XX_STATE_ON;
 372
 373         wl12xx_info("firmware booted (%s)", wl->chip.fw_ver);
 374
 375 out:
 376         if (ret < 0)
 377                 wl12xx_power_off(wl);
 378
 379         mutex_unlock(&wl->mutex);
 380
 381         return ret;
 382 }
 383
 384 static void wl12xx_op_stop(struct ieee80211_hw *hw)
 385 {
 386         struct wl12xx *wl = hw->priv;
 387
 388         wl12xx_info("down");
 389
 390         wl12xx_debug(DEBUG_MAC80211, "mac80211 stop");
 391
 392         mutex_lock(&wl->mutex);
 393
 394         WARN_ON(wl->state != WL12XX_STATE_ON);
 395
 396         if (wl->scanning) {
 397                 mutex_unlock(&wl->mutex);
 398                 ieee80211_scan_completed(wl->hw, true);
 399                 mutex_lock(&wl->mutex);
 400                 wl->scanning = false;
 401         }
 402
 403         wl->state = WL12XX_STATE_OFF;
 404
 405         wl12xx_disable_interrupts(wl);
 406
 407         mutex_unlock(&wl->mutex);
 408
 409         cancel_work_sync(&wl->irq_work);
 410         cancel_work_sync(&wl->tx_work);
 411         cancel_work_sync(&wl->filter_work);
 412
 413         mutex_lock(&wl->mutex);
 414
 415         /* let's notify MAC80211 about the remaining pending TX frames */
 416         wl->chip.op_tx_flush(wl);
 417         wl12xx_power_off(wl);
 418
 419         memset(wl->bssid, 0, ETH_ALEN);
 420         wl->listen_int = 1;
 421         wl->bss_type = MAX_BSS_TYPE;
 422
 423         wl->data_in_count = 0;
 424         wl->rx_counter = 0;
 425         wl->rx_handled = 0;
 426         wl->rx_current_buffer = 0;
 427         wl->rx_last_id = 0;
 428         wl->next_tx_complete = 0;
 429         wl->elp = false;
 430         wl->psm = 0;
 431         wl->tx_queue_stopped = false;
 432         wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
 433
 434         wl12xx_debugfs_reset(wl);
 435
 436         mutex_unlock(&wl->mutex);
 437 }
 438
 439 static int wl12xx_op_add_interface(struct ieee80211_hw *hw,
 440                                    struct ieee80211_if_init_conf *conf)
 441 {
 442         struct wl12xx *wl = hw->priv;
 443         DECLARE_MAC_BUF(mac);
 444         int ret = 0;
 445
 446         wl12xx_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s",
 447                      conf->type, print_mac(mac, conf->mac_addr));
 448
 449         mutex_lock(&wl->mutex);
 450
 451         switch (conf->type) {
 452         case NL80211_IFTYPE_STATION:
 453                 wl->bss_type = BSS_TYPE_STA_BSS;
 454                 break;
 455         case NL80211_IFTYPE_ADHOC:
 456                 wl->bss_type = BSS_TYPE_IBSS;
 457                 break;
 458         default:
 459                 ret = -EOPNOTSUPP;
 460                 goto out;
 461         }
 462
 463         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 464                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 465                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 466                 ret = wl12xx_acx_station_id(wl);
 467                 if (ret < 0)
 468                         goto out;
 469         }
 470
 471 out:
 472         mutex_unlock(&wl->mutex);
 473         return ret;
 474 }
 475
 476 static void wl12xx_op_remove_interface(struct ieee80211_hw *hw,
 477                                          struct ieee80211_if_init_conf *conf)
 478 {
 479         wl12xx_debug(DEBUG_MAC80211, "mac80211 remove interface");
 480 }
 481
 482 static int wl12xx_build_null_data(struct wl12xx *wl)
 483 {
 484         struct wl12xx_null_data_template template;
 485
 486         if (!is_zero_ether_addr(wl->bssid)) {
 487                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 488                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 489         } else {
 490                 memset(template.header.da, 0xff, ETH_ALEN);
 491                 memset(template.header.bssid, 0xff, ETH_ALEN);
 492         }
 493
 494         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 495         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 496                                                 IEEE80211_STYPE_NULLFUNC);
 497
 498         return wl12xx_cmd_template_set(wl, CMD_NULL_DATA, &template,
 499                                        sizeof(template));
 500
 501 }
 502
 503 static int wl12xx_build_ps_poll(struct wl12xx *wl, u16 aid)
 504 {
 505         struct wl12xx_ps_poll_template template;
 506
 507         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 508         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 509         template.aid = aid;
 510         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 511
 512         return wl12xx_cmd_template_set(wl, CMD_PS_POLL, &template,
 513                                        sizeof(template));
 514
 515 }
 516
 517 static int wl12xx_op_config(struct ieee80211_hw *hw, u32 changed)
 518 {
 519         struct wl12xx *wl = hw->priv;
 520         struct ieee80211_conf *conf = &hw->conf;
 521         int channel, ret = 0;
 522
 523         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 524
 525         wl12xx_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 526                      channel,
 527                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 528                      conf->power_level);
 529
 530         mutex_lock(&wl->mutex);
 531
 532         ret = wl12xx_ps_elp_wakeup(wl);
 533         if (ret < 0)
 534                 goto out;
 535
 536         if (channel != wl->channel) {
 537                 /* FIXME: use beacon interval provided by mac80211 */
 538                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 539                 if (ret < 0)
 540                         goto out_sleep;
 541
 542                 wl->channel = channel;
 543         }
 544
 545         ret = wl12xx_build_null_data(wl);
 546         if (ret < 0)
 547                 goto out_sleep;
 548
 549         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 550                 wl12xx_info("psm enabled");
 551
 552                 wl->psm_requested = true;
 553
 554                 /*
 555                  * We enter PSM only if we're already associated.
 556                  * If we're not, we'll enter it when joining an SSID,
 557                  * through the bss_info_changed() hook.
 558                  */
 559                 ret = wl12xx_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 560         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 561                    wl->psm_requested) {
 562                 wl12xx_info("psm disabled");
 563
 564                 wl->psm_requested = false;
 565
 566                 if (wl->psm)
 567                         ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE);
 568         }
 569
 570         if (conf->power_level != wl->power_level) {
 571                 ret = wl12xx_acx_tx_power(wl, conf->power_level);
 572                 if (ret < 0)
 573                         goto out;
 574
 575                 wl->power_level = conf->power_level;
 576         }
 577
 578 out_sleep:
 579         wl12xx_ps_elp_sleep(wl);
 580
 581 out:
 582         mutex_unlock(&wl->mutex);
 583
 584         return ret;
 585 }
 586
 587 #define WL12XX_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 588                                   FIF_ALLMULTI | \
 589                                   FIF_FCSFAIL | \
 590                                   FIF_BCN_PRBRESP_PROMISC | \
 591                                   FIF_CONTROL | \
 592                                   FIF_OTHER_BSS)
 593
 594 static void wl12xx_op_configure_filter(struct ieee80211_hw *hw,
 595                                        unsigned int changed,
 596                                        unsigned int *total,
 597                                        int mc_count,
 598                                        struct dev_addr_list *mc_list)
 599 {
 600         struct wl12xx *wl = hw->priv;
 601
 602         wl12xx_debug(DEBUG_MAC80211, "mac80211 configure filter");
 603
 604         *total &= WL12XX_SUPPORTED_FILTERS;
 605         changed &= WL12XX_SUPPORTED_FILTERS;
 606
 607         if (changed == 0)
 608                 /* no filters which we support changed */
 609                 return;
 610
 611         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 612
 613         wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
 614         wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
 615
 616         if (*total & FIF_PROMISC_IN_BSS) {
 617                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 618                 wl->rx_config |= CFG_RX_ALL_GOOD;
 619         }
 620         if (*total & FIF_ALLMULTI)
 621                 /*
 622                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 623                  * all multicast frames
 624                  */
 625                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 626         if (*total & FIF_FCSFAIL)
 627                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 628         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 629                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 630                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 631         }
 632         if (*total & FIF_CONTROL)
 633                 wl->rx_filter |= CFG_RX_CTL_EN;
 634         if (*total & FIF_OTHER_BSS)
 635                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 636
 637         /*
 638          * FIXME: workqueues need to be properly cancelled on stop(), for
 639          * now let's just disable changing the filter settings. They will
 640          * be updated any on config().
 641          */
 642         /* schedule_work(&wl->filter_work); */
 643 }
 644
 645 /* HW encryption */
 646 static int wl12xx_set_key_type(struct wl12xx *wl,
 647                                struct wl12xx_cmd_set_keys *key,
 648                                enum set_key_cmd cmd,
 649                                struct ieee80211_key_conf *mac80211_key,
 650                                const u8 *addr)
 651 {
 652         switch (mac80211_key->alg) {
 653         case ALG_WEP:
 654                 if (is_broadcast_ether_addr(addr))
 655                         key->key_type = KEY_WEP_DEFAULT;
 656                 else
 657                         key->key_type = KEY_WEP_ADDR;
 658
 659                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 660                 break;
 661         case ALG_TKIP:
 662                 if (is_broadcast_ether_addr(addr))
 663                         key->key_type = KEY_TKIP_MIC_GROUP;
 664                 else
 665                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 666
 667                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 668                 break;
 669         case ALG_CCMP:
 670                 if (is_broadcast_ether_addr(addr))
 671                         key->key_type = KEY_AES_GROUP;
 672                 else
 673                         key->key_type = KEY_AES_PAIRWISE;
 674                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 675                 break;
 676         default:
 677                 wl12xx_error("Unknown key algo 0x%x", mac80211_key->alg);
 678                 return -EOPNOTSUPP;
 679         }
 680
 681         return 0;
 682 }
 683
 684 static int wl12xx_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 685                              struct ieee80211_vif *vif,
 686                              struct ieee80211_sta *sta,
 687                              struct ieee80211_key_conf *key)
 688 {
 689         struct wl12xx *wl = hw->priv;
 690         struct wl12xx_cmd_set_keys *wl_cmd;
 691         const u8 *addr;
 692         int ret;
 693
 694         static const u8 bcast_addr[ETH_ALEN] =
 695                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 696
 697         wl12xx_debug(DEBUG_MAC80211, "mac80211 set key");
 698
 699         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 700         if (!wl_cmd) {
 701                 ret = -ENOMEM;
 702                 goto out;
 703         }
 704
 705         addr = sta ? sta->addr : bcast_addr;
 706
 707         wl12xx_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 708         wl12xx_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 709         wl12xx_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 710                      key->alg, key->keyidx, key->keylen, key->flags);
 711         wl12xx_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 712
 713         if (is_zero_ether_addr(addr)) {
 714                 /* We dont support TX only encryption */
 715                 ret = -EOPNOTSUPP;
 716                 goto out;
 717         }
 718
 719         mutex_lock(&wl->mutex);
 720
 721         ret = wl12xx_ps_elp_wakeup(wl);
 722         if (ret < 0)
 723                 goto out_unlock;
 724
 725         switch (cmd) {
 726         case SET_KEY:
 727                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 728                 break;
 729         case DISABLE_KEY:
 730                 wl_cmd->key_action = KEY_REMOVE;
 731                 break;
 732         default:
 733                 wl12xx_error("Unsupported key cmd 0x%x", cmd);
 734                 break;
 735         }
 736
 737         ret = wl12xx_set_key_type(wl, wl_cmd, cmd, key, addr);
 738         if (ret < 0) {
 739                 wl12xx_error("Set KEY type failed");
 740                 goto out_sleep;
 741         }
 742
 743         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 744                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 745
 746         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 747             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 748                 /*
 749                  * We get the key in the following form:
 750                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 751                  * but the target is expecting:
 752                  * TKIP - RX MIC - TX MIC
 753                  */
 754                 memcpy(wl_cmd->key, key->key, 16);
 755                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 756                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 757
 758         } else {
 759                 memcpy(wl_cmd->key, key->key, key->keylen);
 760         }
 761         wl_cmd->key_size = key->keylen;
 762
 763         wl_cmd->id = key->keyidx;
 764         wl_cmd->ssid_profile = 0;
 765
 766         wl12xx_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 767
 768         ret = wl12xx_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 769         if (ret < 0) {
 770                 wl12xx_warning("could not set keys");
 771                 goto out_sleep;
 772         }
 773
 774 out_sleep:
 775         wl12xx_ps_elp_sleep(wl);
 776
 777 out_unlock:
 778         mutex_unlock(&wl->mutex);
 779
 780 out:
 781         kfree(wl_cmd);
 782
 783         return ret;
 784 }
 785
 786 static int wl12xx_build_basic_rates(char *rates)
 787 {
 788         u8 index = 0;
 789
 790         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 791         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 792         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 793         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 794
 795         return index;
 796 }
 797
 798 static int wl12xx_build_extended_rates(char *rates)
 799 {
 800         u8 index = 0;
 801
 802         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 803         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 804         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 805         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 806         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 807         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 808         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 809         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 810
 811         return index;
 812 }
 813
 814
 815 static int wl12xx_build_probe_req(struct wl12xx *wl, u8 *ssid, size_t ssid_len)
 816 {
 817         struct wl12xx_probe_req_template template;
 818         struct wl12xx_ie_rates *rates;
 819         char *ptr;
 820         u16 size;
 821
 822         ptr = (char *)&template;
 823         size = sizeof(struct ieee80211_header);
 824
 825         memset(template.header.da, 0xff, ETH_ALEN);
 826         memset(template.header.bssid, 0xff, ETH_ALEN);
 827         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 828         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 829
 830         /* IEs */
 831         /* SSID */
 832         template.ssid.header.id = WLAN_EID_SSID;
 833         template.ssid.header.len = ssid_len;
 834         if (ssid_len && ssid)
 835                 memcpy(template.ssid.ssid, ssid, ssid_len);
 836         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 837         ptr += size;
 838
 839         /* Basic Rates */
 840         rates = (struct wl12xx_ie_rates *)ptr;
 841         rates->header.id = WLAN_EID_SUPP_RATES;
 842         rates->header.len = wl12xx_build_basic_rates(rates->rates);
 843         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 844         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 845
 846         /* Extended rates */
 847         rates = (struct wl12xx_ie_rates *)ptr;
 848         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 849         rates->header.len = wl12xx_build_extended_rates(rates->rates);
 850         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 851
 852         wl12xx_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 853
 854         return wl12xx_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 855                                       size);
 856 }
 857
 858 static int wl12xx_hw_scan(struct wl12xx *wl, u8 *ssid, size_t len,
 859                           u8 active_scan, u8 high_prio, u8 num_channels,
 860                           u8 probe_requests)
 861 {
 862         struct wl12xx_cmd_trigger_scan_to *trigger = NULL;
 863         struct cmd_scan *params = NULL;
 864         int i, ret;
 865         u16 scan_options = 0;
 866
 867         if (wl->scanning)
 868                 return -EINVAL;
 869
 870         params = kzalloc(sizeof(*params), GFP_KERNEL);
 871         if (!params)
 872                 return -ENOMEM;
 873
 874         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 875         params->params.rx_filter_options =
 876                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 877
 878         /* High priority scan */
 879         if (!active_scan)
 880                 scan_options |= SCAN_PASSIVE;
 881         if (high_prio)
 882                 scan_options |= SCAN_PRIORITY_HIGH;
 883         params->params.scan_options = scan_options;
 884
 885         params->params.num_channels = num_channels;
 886         params->params.num_probe_requests = probe_requests;
 887         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 888         params->params.tid_trigger = 0;
 889
 890         for (i = 0; i < num_channels; i++) {
 891                 params->channels[i].min_duration = cpu_to_le32(30000);
 892                 params->channels[i].max_duration = cpu_to_le32(60000);
 893                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 894                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 895                 params->channels[i].early_termination = 0;
 896                 params->channels[i].tx_power_att = 0;
 897                 params->channels[i].channel = i + 1;
 898                 memset(params->channels[i].pad, 0, 3);
 899         }
 900
 901         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 902                 memset(&params->channels[i], 0,
 903                        sizeof(struct basic_scan_channel_parameters));
 904
 905         if (len && ssid) {
 906                 params->params.ssid_len = len;
 907                 memcpy(params->params.ssid, ssid, len);
 908         } else {
 909                 params->params.ssid_len = 0;
 910                 memset(params->params.ssid, 0, 32);
 911         }
 912
 913         ret = wl12xx_build_probe_req(wl, ssid, len);
 914         if (ret < 0) {
 915                 wl12xx_error("PROBE request template failed");
 916                 goto out;
 917         }
 918
 919         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 920         if (!trigger)
 921                 goto out;
 922
 923         trigger->timeout = 0;
 924
 925         ret = wl12xx_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 926                               sizeof(*trigger));
 927         if (ret < 0) {
 928                 wl12xx_error("trigger scan to failed for hw scan");
 929                 goto out;
 930         }
 931
 932         wl12xx_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 933
 934         wl->scanning = true;
 935
 936         ret = wl12xx_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 937         if (ret < 0)
 938                 wl12xx_error("SCAN failed");
 939
 940         wl12xx_spi_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
 941
 942         if (params->header.status != CMD_STATUS_SUCCESS) {
 943                 wl12xx_error("TEST command answer error: %d",
 944                              params->header.status);
 945                 wl->scanning = false;
 946                 ret = -EIO;
 947                 goto out;
 948         }
 949
 950 out:
 951         kfree(params);
 952         return ret;
 953
 954 }
 955
 956 static int wl12xx_op_hw_scan(struct ieee80211_hw *hw,
 957                              struct cfg80211_scan_request *req)
 958 {
 959         struct wl12xx *wl = hw->priv;
 960         int ret;
 961         u8 *ssid = NULL;
 962         size_t ssid_len = 0;
 963
 964         wl12xx_debug(DEBUG_MAC80211, "mac80211 hw scan");
 965
 966         if (req->n_ssids) {
 967                 ssid = req->ssids[0].ssid;
 968                 ssid_len = req->ssids[0].ssid_len;
 969         }
 970
 971         mutex_lock(&wl->mutex);
 972
 973         ret = wl12xx_ps_elp_wakeup(wl);
 974         if (ret < 0)
 975                 goto out;
 976
 977         ret = wl12xx_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 978
 979         wl12xx_ps_elp_sleep(wl);
 980
 981 out:
 982         mutex_unlock(&wl->mutex);
 983
 984         return ret;
 985 }
 986
 987 static int wl12xx_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 988 {
 989         struct wl12xx *wl = hw->priv;
 990         int ret;
 991
 992         mutex_lock(&wl->mutex);
 993
 994         ret = wl12xx_ps_elp_wakeup(wl);
 995         if (ret < 0)
 996                 goto out;
 997
 998         ret = wl12xx_acx_rts_threshold(wl, (u16) value);
 999         if (ret < 0)
1000                 wl12xx_warning("wl12xx_op_set_rts_threshold failed: %d", ret);
1001
1002         wl12xx_ps_elp_sleep(wl);
1003
1004 out:
1005         mutex_unlock(&wl->mutex);
1006
1007         return ret;
1008 }
1009
1010 static void wl12xx_op_bss_info_changed(struct ieee80211_hw *hw,
1011                                        struct ieee80211_vif *vif,
1012                                        struct ieee80211_bss_conf *bss_conf,
1013                                        u32 changed)
1014 {
1015         enum wl12xx_cmd_ps_mode mode;
1016         struct wl12xx *wl = hw->priv;
1017         struct sk_buff *beacon;
1018         int ret;
1019
1020         wl12xx_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1021
1022         mutex_lock(&wl->mutex);
1023
1024         ret = wl12xx_ps_elp_wakeup(wl);
1025         if (ret < 0)
1026                 goto out;
1027
1028         if (changed & BSS_CHANGED_ASSOC) {
1029                 if (bss_conf->assoc) {
1030                         wl->aid = bss_conf->aid;
1031
1032                         ret = wl12xx_build_ps_poll(wl, wl->aid);
1033                         if (ret < 0)
1034                                 goto out_sleep;
1035
1036                         ret = wl12xx_acx_aid(wl, wl->aid);
1037                         if (ret < 0)
1038                                 goto out_sleep;
1039
1040                         /* If we want to go in PSM but we're not there yet */
1041                         if (wl->psm_requested && !wl->psm) {
1042                                 mode = STATION_POWER_SAVE_MODE;
1043                                 ret = wl12xx_ps_set_mode(wl, mode);
1044                                 if (ret < 0)
1045                                         goto out_sleep;
1046                         }
1047                 }
1048         }
1049         if (changed & BSS_CHANGED_ERP_SLOT) {
1050                 if (bss_conf->use_short_slot)
1051                         ret = wl12xx_acx_slot(wl, SLOT_TIME_SHORT);
1052                 else
1053                         ret = wl12xx_acx_slot(wl, SLOT_TIME_LONG);
1054                 if (ret < 0) {
1055                         wl12xx_warning("Set slot time failed %d", ret);
1056                         goto out_sleep;
1057                 }
1058         }
1059
1060         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1061                 if (bss_conf->use_short_preamble)
1062                         wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1063                 else
1064                         wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1065         }
1066
1067         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1068                 if (bss_conf->use_cts_prot)
1069                         ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1070                 else
1071                         ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1072                 if (ret < 0) {
1073                         wl12xx_warning("Set ctsprotect failed %d", ret);
1074                         goto out_sleep;
1075                 }
1076         }
1077
1078         if (changed & BSS_CHANGED_BSSID) {
1079                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1080
1081                 ret = wl12xx_build_null_data(wl);
1082                 if (ret < 0)
1083                         goto out;
1084
1085                 if (wl->bss_type != BSS_TYPE_IBSS) {
1086                         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 5, 100, 1);
1087                         if (ret < 0)
1088                                 goto out;
1089                 }
1090         }
1091
1092         if (changed & BSS_CHANGED_BEACON) {
1093                 beacon = ieee80211_beacon_get(hw, vif);
1094                 ret = wl12xx_cmd_template_set(wl, CMD_BEACON, beacon->data,
1095                                               beacon->len);
1096
1097                 if (ret < 0) {
1098                         dev_kfree_skb(beacon);
1099                         goto out;
1100                 }
1101
1102                 ret = wl12xx_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1103                                               beacon->len);
1104
1105                 dev_kfree_skb(beacon);
1106
1107                 if (ret < 0)
1108                         goto out;
1109
1110                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
1111
1112                 if (ret < 0)
1113                         goto out;
1114         }
1115
1116 out_sleep:
1117         wl12xx_ps_elp_sleep(wl);
1118
1119 out:
1120         mutex_unlock(&wl->mutex);
1121 }
1122
1123
1124 /* can't be const, mac80211 writes to this */
1125 static struct ieee80211_rate wl12xx_rates[] = {
1126         { .bitrate = 10,
1127           .hw_value = 0x1,
1128           .hw_value_short = 0x1, },
1129         { .bitrate = 20,
1130           .hw_value = 0x2,
1131           .hw_value_short = 0x2,
1132           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1133         { .bitrate = 55,
1134           .hw_value = 0x4,
1135           .hw_value_short = 0x4,
1136           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1137         { .bitrate = 110,
1138           .hw_value = 0x20,
1139           .hw_value_short = 0x20,
1140           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1141         { .bitrate = 60,
1142           .hw_value = 0x8,
1143           .hw_value_short = 0x8, },
1144         { .bitrate = 90,
1145           .hw_value = 0x10,
1146           .hw_value_short = 0x10, },
1147         { .bitrate = 120,
1148           .hw_value = 0x40,
1149           .hw_value_short = 0x40, },
1150         { .bitrate = 180,
1151           .hw_value = 0x80,
1152           .hw_value_short = 0x80, },
1153         { .bitrate = 240,
1154           .hw_value = 0x200,
1155           .hw_value_short = 0x200, },
1156         { .bitrate = 360,
1157          .hw_value = 0x400,
1158          .hw_value_short = 0x400, },
1159         { .bitrate = 480,
1160           .hw_value = 0x800,
1161           .hw_value_short = 0x800, },
1162         { .bitrate = 540,
1163           .hw_value = 0x1000,
1164           .hw_value_short = 0x1000, },
1165 };
1166
1167 /* can't be const, mac80211 writes to this */
1168 static struct ieee80211_channel wl12xx_channels[] = {
1169         { .hw_value = 1, .center_freq = 2412},
1170         { .hw_value = 2, .center_freq = 2417},
1171         { .hw_value = 3, .center_freq = 2422},
1172         { .hw_value = 4, .center_freq = 2427},
1173         { .hw_value = 5, .center_freq = 2432},
1174         { .hw_value = 6, .center_freq = 2437},
1175         { .hw_value = 7, .center_freq = 2442},
1176         { .hw_value = 8, .center_freq = 2447},
1177         { .hw_value = 9, .center_freq = 2452},
1178         { .hw_value = 10, .center_freq = 2457},
1179         { .hw_value = 11, .center_freq = 2462},
1180         { .hw_value = 12, .center_freq = 2467},
1181         { .hw_value = 13, .center_freq = 2472},
1182 };
1183
1184 /* can't be const, mac80211 writes to this */
1185 static struct ieee80211_supported_band wl12xx_band_2ghz = {
1186         .channels = wl12xx_channels,
1187         .n_channels = ARRAY_SIZE(wl12xx_channels),
1188         .bitrates = wl12xx_rates,
1189         .n_bitrates = ARRAY_SIZE(wl12xx_rates),
1190 };
1191
1192 static const struct ieee80211_ops wl12xx_ops = {
1193         .start = wl12xx_op_start,
1194         .stop = wl12xx_op_stop,
1195         .add_interface = wl12xx_op_add_interface,
1196         .remove_interface = wl12xx_op_remove_interface,
1197         .config = wl12xx_op_config,
1198         .configure_filter = wl12xx_op_configure_filter,
1199         .tx = wl12xx_op_tx,
1200         .set_key = wl12xx_op_set_key,
1201         .hw_scan = wl12xx_op_hw_scan,
1202         .bss_info_changed = wl12xx_op_bss_info_changed,
1203         .set_rts_threshold = wl12xx_op_set_rts_threshold,
1204 };
1205
1206 static int wl12xx_register_hw(struct wl12xx *wl)
1207 {
1208         int ret;
1209
1210         if (wl->mac80211_registered)
1211                 return 0;
1212
1213         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1214
1215         ret = ieee80211_register_hw(wl->hw);
1216         if (ret < 0) {
1217                 wl12xx_error("unable to register mac80211 hw: %d", ret);
1218                 return ret;
1219         }
1220
1221         wl->mac80211_registered = true;
1222
1223         wl12xx_notice("loaded");
1224
1225         return 0;
1226 }
1227
1228 static int wl12xx_init_ieee80211(struct wl12xx *wl)
1229 {
1230         /* The tx descriptor buffer and the TKIP space */
1231         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1232                 + WL1251_TKIP_IV_SPACE;
1233
1234         /* unit us */
1235         /* FIXME: find a proper value */
1236         wl->hw->channel_change_time = 10000;
1237
1238         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1239                 IEEE80211_HW_NOISE_DBM;
1240
1241         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1242         wl->hw->wiphy->max_scan_ssids = 1;
1243         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl12xx_band_2ghz;
1244
1245         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1246
1247         return 0;
1248 }
1249
1250 #define WL12XX_DEFAULT_CHANNEL 1
1251 static int __devinit wl12xx_probe(struct spi_device *spi)
1252 {
1253         struct wl12xx_platform_data *pdata;
1254         struct ieee80211_hw *hw;
1255         struct wl12xx *wl;
1256         int ret, i;
1257         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1258
1259         pdata = spi->dev.platform_data;
1260         if (!pdata) {
1261                 wl12xx_error("no platform data");
1262                 return -ENODEV;
1263         }
1264
1265         hw = ieee80211_alloc_hw(sizeof(*wl), &wl12xx_ops);
1266         if (!hw) {
1267                 wl12xx_error("could not alloc ieee80211_hw");
1268                 return -ENOMEM;
1269         }
1270
1271         wl = hw->priv;
1272         memset(wl, 0, sizeof(*wl));
1273
1274         wl->hw = hw;
1275         dev_set_drvdata(&spi->dev, wl);
1276         wl->spi = spi;
1277
1278         wl->data_in_count = 0;
1279
1280         skb_queue_head_init(&wl->tx_queue);
1281
1282         INIT_WORK(&wl->filter_work, wl12xx_filter_work);
1283         wl->channel = WL12XX_DEFAULT_CHANNEL;
1284         wl->scanning = false;
1285         wl->default_key = 0;
1286         wl->listen_int = 1;
1287         wl->rx_counter = 0;
1288         wl->rx_handled = 0;
1289         wl->rx_current_buffer = 0;
1290         wl->rx_last_id = 0;
1291         wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
1292         wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
1293         wl->elp = false;
1294         wl->psm = 0;
1295         wl->psm_requested = false;
1296         wl->tx_queue_stopped = false;
1297         wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
1298
1299         /* We use the default power on sleep time until we know which chip
1300          * we're using */
1301         wl->chip.power_on_sleep = WL12XX_DEFAULT_POWER_ON_SLEEP;
1302
1303         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1304                 wl->tx_frames[i] = NULL;
1305
1306         wl->next_tx_complete = 0;
1307
1308         /*
1309          * In case our MAC address is not correctly set,
1310          * we use a random but Nokia MAC.
1311          */
1312         memcpy(wl->mac_addr, nokia_oui, 3);
1313         get_random_bytes(wl->mac_addr + 3, 3);
1314
1315         wl->state = WL12XX_STATE_OFF;
1316         mutex_init(&wl->mutex);
1317
1318         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1319         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1320
1321         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1322         if (!wl->rx_descriptor) {
1323                 wl12xx_error("could not allocate memory for rx descriptor");
1324                 ret = -ENOMEM;
1325                 goto out_free;
1326         }
1327
1328         /* This is the only SPI value that we need to set here, the rest
1329          * comes from the board-peripherals file */
1330         spi->bits_per_word = 32;
1331
1332         ret = spi_setup(spi);
1333         if (ret < 0) {
1334                 wl12xx_error("spi_setup failed");
1335                 goto out_free;
1336         }
1337
1338         wl->set_power = pdata->set_power;
1339         if (!wl->set_power) {
1340                 wl12xx_error("set power function missing in platform data");
1341                 ret = -ENODEV;
1342                 goto out_free;
1343         }
1344
1345         wl->irq = spi->irq;
1346         if (wl->irq < 0) {
1347                 wl12xx_error("irq missing in platform data");
1348                 ret = -ENODEV;
1349                 goto out_free;
1350         }
1351
1352         ret = request_irq(wl->irq, wl12xx_irq, 0, DRIVER_NAME, wl);
1353         if (ret < 0) {
1354                 wl12xx_error("request_irq() failed: %d", ret);
1355                 goto out_free;
1356         }
1357
1358         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1359
1360         disable_irq(wl->irq);
1361
1362         ret = wl12xx_init_ieee80211(wl);
1363         if (ret)
1364                 goto out_irq;
1365
1366         ret = wl12xx_register_hw(wl);
1367         if (ret)
1368                 goto out_irq;
1369
1370         wl12xx_debugfs_init(wl);
1371
1372         wl12xx_notice("initialized");
1373
1374         return 0;
1375
1376  out_irq:
1377         free_irq(wl->irq, wl);
1378
1379  out_free:
1380         kfree(wl->rx_descriptor);
1381         wl->rx_descriptor = NULL;
1382
1383         ieee80211_free_hw(hw);
1384
1385         return ret;
1386 }
1387
1388 static int __devexit wl12xx_remove(struct spi_device *spi)
1389 {
1390         struct wl12xx *wl = dev_get_drvdata(&spi->dev);
1391
1392         ieee80211_unregister_hw(wl->hw);
1393
1394         wl12xx_debugfs_exit(wl);
1395
1396         free_irq(wl->irq, wl);
1397         kfree(wl->target_mem_map);
1398         kfree(wl->data_path);
1399         kfree(wl->fw);
1400         wl->fw = NULL;
1401         kfree(wl->nvs);
1402         wl->nvs = NULL;
1403
1404         kfree(wl->rx_descriptor);
1405         wl->rx_descriptor = NULL;
1406
1407         ieee80211_free_hw(wl->hw);
1408
1409         return 0;
1410 }
1411
1412
1413 static struct spi_driver wl12xx_spi_driver = {
1414         .driver = {
1415                 .name           = "wl12xx",
1416                 .bus            = &spi_bus_type,
1417                 .owner          = THIS_MODULE,
1418         },
1419
1420         .probe          = wl12xx_probe,
1421         .remove         = __devexit_p(wl12xx_remove),
1422 };
1423
1424 static int __init wl12xx_init(void)
1425 {
1426         int ret;
1427
1428         ret = spi_register_driver(&wl12xx_spi_driver);
1429         if (ret < 0) {
1430                 wl12xx_error("failed to register spi driver: %d", ret);
1431                 goto out;
1432         }
1433
1434 out:
1435         return ret;
1436 }
1437
1438 static void __exit wl12xx_exit(void)
1439 {
1440         spi_unregister_driver(&wl12xx_spi_driver);
1441
1442         wl12xx_notice("unloaded");
1443 }
1444
1445 module_init(wl12xx_init);
1446 module_exit(wl12xx_exit);
1447
1448 MODULE_LICENSE("GPL");
1449 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>, "
1450                 "Luciano Coelho <luciano.coelho@nokia.com>");