drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/vmalloc.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "wl1251_reg.h"
  36 #include "wl1251_io.h"
  37 #include "wl1251_cmd.h"
  38 #include "wl1251_event.h"
  39 #include "wl1251_tx.h"
  40 #include "wl1251_rx.h"
  41 #include "wl1251_ps.h"
  42 #include "wl1251_init.h"
  43 #include "wl1251_debugfs.h"
  44 #include "wl1251_boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static void wl1251_power_off(struct wl1251 *wl)
  57 {
  58         wl->set_power(false);
  59 }
  60
  61 static void wl1251_power_on(struct wl1251 *wl)
  62 {
  63         wl->set_power(true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         memcpy(wl->nvs, fw->data, wl->nvs_len);
 135
 136         ret = 0;
 137
 138 out:
 139         release_firmware(fw);
 140
 141         return ret;
 142 }
 143
 144 static void wl1251_fw_wakeup(struct wl1251 *wl)
 145 {
 146         u32 elp_reg;
 147
 148         elp_reg = ELPCTRL_WAKE_UP;
 149         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 150         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 151
 152         if (!(elp_reg & ELPCTRL_WLAN_READY))
 153                 wl1251_warning("WLAN not ready");
 154 }
 155
 156 static int wl1251_chip_wakeup(struct wl1251 *wl)
 157 {
 158         int ret = 0;
 159
 160         wl1251_power_on(wl);
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         /* No NVS from netlink, try to get it from the filesystem */
 205         if (wl->nvs == NULL) {
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 10
 216 static void wl1251_irq_work(struct work_struct *work)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl =
 220                 container_of(work, struct wl1251, irq_work);
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 298                             WL1251_ACX_INTR_EVENT_B)) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 300                                      intr);
 301                         if (intr & WL1251_ACX_INTR_EVENT_A)
 302                                 wl1251_event_handle(wl, 0);
 303                         else
 304                                 wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 if (--ctr == 0)
 312                         break;
 313
 314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 315         } while (intr);
 316
 317 out_sleep:
 318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 319         wl1251_ps_elp_sleep(wl);
 320
 321 out:
 322         mutex_unlock(&wl->mutex);
 323 }
 324
 325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 326                        u16 beacon_interval, u8 dtim_period)
 327 {
 328         int ret;
 329
 330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 332                                      wl->tx_mgmt_frm_rate,
 333                                      wl->tx_mgmt_frm_mod);
 334         if (ret < 0)
 335                 goto out;
 336
 337
 338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 339                               dtim_period);
 340         if (ret < 0)
 341                 goto out;
 342
 343         /*
 344          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 345          * locking we just sleep instead, for now
 346          */
 347         msleep(10);
 348
 349 out:
 350         return ret;
 351 }
 352
 353 static void wl1251_filter_work(struct work_struct *work)
 354 {
 355         struct wl1251 *wl =
 356                 container_of(work, struct wl1251, filter_work);
 357         int ret;
 358
 359         mutex_lock(&wl->mutex);
 360
 361         if (wl->state == WL1251_STATE_OFF)
 362                 goto out;
 363
 364         ret = wl1251_ps_elp_wakeup(wl);
 365         if (ret < 0)
 366                 goto out;
 367
 368         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 369                           wl->dtim_period);
 370         if (ret < 0)
 371                 goto out_sleep;
 372
 373 out_sleep:
 374         wl1251_ps_elp_sleep(wl);
 375
 376 out:
 377         mutex_unlock(&wl->mutex);
 378 }
 379
 380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 381 {
 382         struct wl1251 *wl = hw->priv;
 383
 384         skb_queue_tail(&wl->tx_queue, skb);
 385
 386         /*
 387          * The chip specific setup must run before the first TX packet -
 388          * before that, the tx_work will not be initialized!
 389          */
 390
 391         ieee80211_queue_work(wl->hw, &wl->tx_work);
 392
 393         /*
 394          * The workqueue is slow to process the tx_queue and we need stop
 395          * the queue here, otherwise the queue will get too long.
 396          */
 397         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 398                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 399                 ieee80211_stop_queues(wl->hw);
 400
 401                 /*
 402                  * FIXME: this is racy, the variable is not properly
 403                  * protected. Maybe fix this by removing the stupid
 404                  * variable altogether and checking the real queue state?
 405                  */
 406                 wl->tx_queue_stopped = true;
 407         }
 408
 409         return NETDEV_TX_OK;
 410 }
 411
 412 static int wl1251_op_start(struct ieee80211_hw *hw)
 413 {
 414         struct wl1251 *wl = hw->priv;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448 out:
 449         if (ret < 0)
 450                 wl1251_power_off(wl);
 451
 452         mutex_unlock(&wl->mutex);
 453
 454         return ret;
 455 }
 456
 457 static void wl1251_op_stop(struct ieee80211_hw *hw)
 458 {
 459         struct wl1251 *wl = hw->priv;
 460
 461         wl1251_info("down");
 462
 463         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 464
 465         mutex_lock(&wl->mutex);
 466
 467         WARN_ON(wl->state != WL1251_STATE_ON);
 468
 469         if (wl->scanning) {
 470                 mutex_unlock(&wl->mutex);
 471                 ieee80211_scan_completed(wl->hw, true);
 472                 mutex_lock(&wl->mutex);
 473                 wl->scanning = false;
 474         }
 475
 476         wl->state = WL1251_STATE_OFF;
 477
 478         wl1251_disable_interrupts(wl);
 479
 480         mutex_unlock(&wl->mutex);
 481
 482         cancel_work_sync(&wl->irq_work);
 483         cancel_work_sync(&wl->tx_work);
 484         cancel_work_sync(&wl->filter_work);
 485
 486         mutex_lock(&wl->mutex);
 487
 488         /* let's notify MAC80211 about the remaining pending TX frames */
 489         wl1251_tx_flush(wl);
 490         wl1251_power_off(wl);
 491
 492         memset(wl->bssid, 0, ETH_ALEN);
 493         wl->listen_int = 1;
 494         wl->bss_type = MAX_BSS_TYPE;
 495
 496         wl->data_in_count = 0;
 497         wl->rx_counter = 0;
 498         wl->rx_handled = 0;
 499         wl->rx_current_buffer = 0;
 500         wl->rx_last_id = 0;
 501         wl->next_tx_complete = 0;
 502         wl->elp = false;
 503         wl->psm = 0;
 504         wl->tx_queue_stopped = false;
 505         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 506         wl->channel = WL1251_DEFAULT_CHANNEL;
 507
 508         wl1251_debugfs_reset(wl);
 509
 510         mutex_unlock(&wl->mutex);
 511 }
 512
 513 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 514                                    struct ieee80211_vif *vif)
 515 {
 516         struct wl1251 *wl = hw->priv;
 517         int ret = 0;
 518
 519         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 520                      vif->type, vif->addr);
 521
 522         mutex_lock(&wl->mutex);
 523         if (wl->vif) {
 524                 ret = -EBUSY;
 525                 goto out;
 526         }
 527
 528         wl->vif = vif;
 529
 530         switch (vif->type) {
 531         case NL80211_IFTYPE_STATION:
 532                 wl->bss_type = BSS_TYPE_STA_BSS;
 533                 break;
 534         case NL80211_IFTYPE_ADHOC:
 535                 wl->bss_type = BSS_TYPE_IBSS;
 536                 break;
 537         default:
 538                 ret = -EOPNOTSUPP;
 539                 goto out;
 540         }
 541
 542         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 543                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 544                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 545                 ret = wl1251_acx_station_id(wl);
 546                 if (ret < 0)
 547                         goto out;
 548         }
 549
 550 out:
 551         mutex_unlock(&wl->mutex);
 552         return ret;
 553 }
 554
 555 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 556                                          struct ieee80211_vif *vif)
 557 {
 558         struct wl1251 *wl = hw->priv;
 559
 560         mutex_lock(&wl->mutex);
 561         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 562         wl->vif = NULL;
 563         mutex_unlock(&wl->mutex);
 564 }
 565
 566 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 567 {
 568         struct ieee80211_qos_hdr template;
 569
 570         memset(&template, 0, sizeof(template));
 571
 572         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 573         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 574         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 575
 576         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 577                                              IEEE80211_STYPE_QOS_NULLFUNC |
 578                                              IEEE80211_FCTL_TODS);
 579
 580         /* FIXME: not sure what priority to use here */
 581         template.qos_ctrl = cpu_to_le16(0);
 582
 583         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 584                                        sizeof(template));
 585 }
 586
 587 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 588 {
 589         struct wl1251 *wl = hw->priv;
 590         struct ieee80211_conf *conf = &hw->conf;
 591         int channel, ret = 0;
 592
 593         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 594
 595         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 596                      channel,
 597                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 598                      conf->power_level);
 599
 600         mutex_lock(&wl->mutex);
 601
 602         ret = wl1251_ps_elp_wakeup(wl);
 603         if (ret < 0)
 604                 goto out;
 605
 606         if (channel != wl->channel) {
 607                 wl->channel = channel;
 608
 609                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 610                                   wl->beacon_int, wl->dtim_period);
 611                 if (ret < 0)
 612                         goto out_sleep;
 613         }
 614
 615         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 616                 wl1251_debug(DEBUG_PSM, "psm enabled");
 617
 618                 wl->psm_requested = true;
 619
 620                 wl->dtim_period = conf->ps_dtim_period;
 621
 622                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 623                                                   wl->dtim_period);
 624
 625                 /*
 626                  * mac80211 enables PSM only if we're already associated.
 627                  */
 628                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 629                 if (ret < 0)
 630                         goto out_sleep;
 631         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 632                    wl->psm_requested) {
 633                 wl1251_debug(DEBUG_PSM, "psm disabled");
 634
 635                 wl->psm_requested = false;
 636
 637                 if (wl->psm) {
 638                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 639                         if (ret < 0)
 640                                 goto out_sleep;
 641                 }
 642         }
 643
 644         if (conf->power_level != wl->power_level) {
 645                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 646                 if (ret < 0)
 647                         goto out_sleep;
 648
 649                 wl->power_level = conf->power_level;
 650         }
 651
 652 out_sleep:
 653         wl1251_ps_elp_sleep(wl);
 654
 655 out:
 656         mutex_unlock(&wl->mutex);
 657
 658         return ret;
 659 }
 660
 661 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 662                                   FIF_ALLMULTI | \
 663                                   FIF_FCSFAIL | \
 664                                   FIF_BCN_PRBRESP_PROMISC | \
 665                                   FIF_CONTROL | \
 666                                   FIF_OTHER_BSS)
 667
 668 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 669                                        unsigned int changed,
 670                                        unsigned int *total,u64 multicast)
 671 {
 672         struct wl1251 *wl = hw->priv;
 673
 674         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 675
 676         *total &= WL1251_SUPPORTED_FILTERS;
 677         changed &= WL1251_SUPPORTED_FILTERS;
 678
 679         if (changed == 0)
 680                 /* no filters which we support changed */
 681                 return;
 682
 683         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 684
 685         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 686         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 687
 688         if (*total & FIF_PROMISC_IN_BSS) {
 689                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 690                 wl->rx_config |= CFG_RX_ALL_GOOD;
 691         }
 692         if (*total & FIF_ALLMULTI)
 693                 /*
 694                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 695                  * all multicast frames
 696                  */
 697                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 698         if (*total & FIF_FCSFAIL)
 699                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 700         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 701                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 702                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 703         }
 704         if (*total & FIF_CONTROL)
 705                 wl->rx_filter |= CFG_RX_CTL_EN;
 706         if (*total & FIF_OTHER_BSS)
 707                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 708
 709         /*
 710          * FIXME: workqueues need to be properly cancelled on stop(), for
 711          * now let's just disable changing the filter settings. They will
 712          * be updated any on config().
 713          */
 714         /* schedule_work(&wl->filter_work); */
 715 }
 716
 717 /* HW encryption */
 718 static int wl1251_set_key_type(struct wl1251 *wl,
 719                                struct wl1251_cmd_set_keys *key,
 720                                enum set_key_cmd cmd,
 721                                struct ieee80211_key_conf *mac80211_key,
 722                                const u8 *addr)
 723 {
 724         switch (mac80211_key->alg) {
 725         case ALG_WEP:
 726                 if (is_broadcast_ether_addr(addr))
 727                         key->key_type = KEY_WEP_DEFAULT;
 728                 else
 729                         key->key_type = KEY_WEP_ADDR;
 730
 731                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 732                 break;
 733         case ALG_TKIP:
 734                 if (is_broadcast_ether_addr(addr))
 735                         key->key_type = KEY_TKIP_MIC_GROUP;
 736                 else
 737                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 738
 739                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 740                 break;
 741         case ALG_CCMP:
 742                 if (is_broadcast_ether_addr(addr))
 743                         key->key_type = KEY_AES_GROUP;
 744                 else
 745                         key->key_type = KEY_AES_PAIRWISE;
 746                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 747                 break;
 748         default:
 749                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 750                 return -EOPNOTSUPP;
 751         }
 752
 753         return 0;
 754 }
 755
 756 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 757                              struct ieee80211_vif *vif,
 758                              struct ieee80211_sta *sta,
 759                              struct ieee80211_key_conf *key)
 760 {
 761         struct wl1251 *wl = hw->priv;
 762         struct wl1251_cmd_set_keys *wl_cmd;
 763         const u8 *addr;
 764         int ret;
 765
 766         static const u8 bcast_addr[ETH_ALEN] =
 767                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 768
 769         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 770
 771         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 772         if (!wl_cmd) {
 773                 ret = -ENOMEM;
 774                 goto out;
 775         }
 776
 777         addr = sta ? sta->addr : bcast_addr;
 778
 779         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 780         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 781         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 782                      key->alg, key->keyidx, key->keylen, key->flags);
 783         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 784
 785         if (is_zero_ether_addr(addr)) {
 786                 /* We dont support TX only encryption */
 787                 ret = -EOPNOTSUPP;
 788                 goto out;
 789         }
 790
 791         mutex_lock(&wl->mutex);
 792
 793         ret = wl1251_ps_elp_wakeup(wl);
 794         if (ret < 0)
 795                 goto out_unlock;
 796
 797         switch (cmd) {
 798         case SET_KEY:
 799                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 800                 break;
 801         case DISABLE_KEY:
 802                 wl_cmd->key_action = KEY_REMOVE;
 803                 break;
 804         default:
 805                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 806                 break;
 807         }
 808
 809         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 810         if (ret < 0) {
 811                 wl1251_error("Set KEY type failed");
 812                 goto out_sleep;
 813         }
 814
 815         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 816                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 817
 818         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 819             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 820                 /*
 821                  * We get the key in the following form:
 822                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 823                  * but the target is expecting:
 824                  * TKIP - RX MIC - TX MIC
 825                  */
 826                 memcpy(wl_cmd->key, key->key, 16);
 827                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 828                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 829
 830         } else {
 831                 memcpy(wl_cmd->key, key->key, key->keylen);
 832         }
 833         wl_cmd->key_size = key->keylen;
 834
 835         wl_cmd->id = key->keyidx;
 836         wl_cmd->ssid_profile = 0;
 837
 838         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 839
 840         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 841         if (ret < 0) {
 842                 wl1251_warning("could not set keys");
 843                 goto out_sleep;
 844         }
 845
 846 out_sleep:
 847         wl1251_ps_elp_sleep(wl);
 848
 849 out_unlock:
 850         mutex_unlock(&wl->mutex);
 851
 852 out:
 853         kfree(wl_cmd);
 854
 855         return ret;
 856 }
 857
 858 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 859                              struct cfg80211_scan_request *req)
 860 {
 861         struct wl1251 *wl = hw->priv;
 862         struct sk_buff *skb;
 863         size_t ssid_len = 0;
 864         u8 *ssid = NULL;
 865         int ret;
 866
 867         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 868
 869         if (req->n_ssids) {
 870                 ssid = req->ssids[0].ssid;
 871                 ssid_len = req->ssids[0].ssid_len;
 872         }
 873
 874         mutex_lock(&wl->mutex);
 875
 876         if (wl->scanning) {
 877                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 878                 ret = -EINVAL;
 879                 goto out;
 880         }
 881
 882         ret = wl1251_ps_elp_wakeup(wl);
 883         if (ret < 0)
 884                 goto out;
 885
 886         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 887                                      req->ie, req->ie_len);
 888         if (!skb) {
 889                 ret = -ENOMEM;
 890                 goto out;
 891         }
 892
 893         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 894                                       skb->len);
 895         dev_kfree_skb(skb);
 896         if (ret < 0)
 897                 goto out_sleep;
 898
 899         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 900         if (ret < 0)
 901                 goto out_sleep;
 902
 903         wl->scanning = true;
 904
 905         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 906                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 907         if (ret < 0) {
 908                 wl->scanning = false;
 909                 goto out_sleep;
 910         }
 911
 912 out_sleep:
 913         wl1251_ps_elp_sleep(wl);
 914
 915 out:
 916         mutex_unlock(&wl->mutex);
 917
 918         return ret;
 919 }
 920
 921 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 922 {
 923         struct wl1251 *wl = hw->priv;
 924         int ret;
 925
 926         mutex_lock(&wl->mutex);
 927
 928         ret = wl1251_ps_elp_wakeup(wl);
 929         if (ret < 0)
 930                 goto out;
 931
 932         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 933         if (ret < 0)
 934                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 935
 936         wl1251_ps_elp_sleep(wl);
 937
 938 out:
 939         mutex_unlock(&wl->mutex);
 940
 941         return ret;
 942 }
 943
 944 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 945                                        struct ieee80211_vif *vif,
 946                                        struct ieee80211_bss_conf *bss_conf,
 947                                        u32 changed)
 948 {
 949         struct wl1251 *wl = hw->priv;
 950         struct sk_buff *beacon, *skb;
 951         int ret;
 952
 953         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 954
 955         mutex_lock(&wl->mutex);
 956
 957         ret = wl1251_ps_elp_wakeup(wl);
 958         if (ret < 0)
 959                 goto out;
 960
 961         if (changed & BSS_CHANGED_BSSID) {
 962                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 963
 964                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 965                 if (!skb)
 966                         goto out_sleep;
 967
 968                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 969                                               skb->data, skb->len);
 970                 dev_kfree_skb(skb);
 971                 if (ret < 0)
 972                         goto out_sleep;
 973
 974                 ret = wl1251_build_qos_null_data(wl);
 975                 if (ret < 0)
 976                         goto out;
 977
 978                 if (wl->bss_type != BSS_TYPE_IBSS) {
 979                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 980                                           wl->beacon_int, wl->dtim_period);
 981                         if (ret < 0)
 982                                 goto out_sleep;
 983                 }
 984         }
 985
 986         if (changed & BSS_CHANGED_ASSOC) {
 987                 if (bss_conf->assoc) {
 988                         wl->beacon_int = bss_conf->beacon_int;
 989
 990                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 991                         if (!skb)
 992                                 goto out_sleep;
 993
 994                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 995                                                       skb->data,
 996                                                       skb->len);
 997                         dev_kfree_skb(skb);
 998                         if (ret < 0)
 999                                 goto out_sleep;
1000
1001                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1002                         if (ret < 0)
1003                                 goto out_sleep;
1004                 } else {
1005                         /* use defaults when not associated */
1006                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1007                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1008                 }
1009         }
1010         if (changed & BSS_CHANGED_ERP_SLOT) {
1011                 if (bss_conf->use_short_slot)
1012                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1013                 else
1014                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1015                 if (ret < 0) {
1016                         wl1251_warning("Set slot time failed %d", ret);
1017                         goto out_sleep;
1018                 }
1019         }
1020
1021         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1022                 if (bss_conf->use_short_preamble)
1023                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1024                 else
1025                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1026         }
1027
1028         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1029                 if (bss_conf->use_cts_prot)
1030                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1031                 else
1032                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1033                 if (ret < 0) {
1034                         wl1251_warning("Set ctsprotect failed %d", ret);
1035                         goto out_sleep;
1036                 }
1037         }
1038
1039         if (changed & BSS_CHANGED_BEACON) {
1040                 beacon = ieee80211_beacon_get(hw, vif);
1041                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1042                                               beacon->len);
1043
1044                 if (ret < 0) {
1045                         dev_kfree_skb(beacon);
1046                         goto out_sleep;
1047                 }
1048
1049                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1050                                               beacon->len);
1051
1052                 dev_kfree_skb(beacon);
1053
1054                 if (ret < 0)
1055                         goto out_sleep;
1056
1057                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1058                                   wl->channel, wl->dtim_period);
1059
1060                 if (ret < 0)
1061                         goto out_sleep;
1062         }
1063
1064 out_sleep:
1065         wl1251_ps_elp_sleep(wl);
1066
1067 out:
1068         mutex_unlock(&wl->mutex);
1069 }
1070
1071
1072 /* can't be const, mac80211 writes to this */
1073 static struct ieee80211_rate wl1251_rates[] = {
1074         { .bitrate = 10,
1075           .hw_value = 0x1,
1076           .hw_value_short = 0x1, },
1077         { .bitrate = 20,
1078           .hw_value = 0x2,
1079           .hw_value_short = 0x2,
1080           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1081         { .bitrate = 55,
1082           .hw_value = 0x4,
1083           .hw_value_short = 0x4,
1084           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1085         { .bitrate = 110,
1086           .hw_value = 0x20,
1087           .hw_value_short = 0x20,
1088           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1089         { .bitrate = 60,
1090           .hw_value = 0x8,
1091           .hw_value_short = 0x8, },
1092         { .bitrate = 90,
1093           .hw_value = 0x10,
1094           .hw_value_short = 0x10, },
1095         { .bitrate = 120,
1096           .hw_value = 0x40,
1097           .hw_value_short = 0x40, },
1098         { .bitrate = 180,
1099           .hw_value = 0x80,
1100           .hw_value_short = 0x80, },
1101         { .bitrate = 240,
1102           .hw_value = 0x200,
1103           .hw_value_short = 0x200, },
1104         { .bitrate = 360,
1105          .hw_value = 0x400,
1106          .hw_value_short = 0x400, },
1107         { .bitrate = 480,
1108           .hw_value = 0x800,
1109           .hw_value_short = 0x800, },
1110         { .bitrate = 540,
1111           .hw_value = 0x1000,
1112           .hw_value_short = 0x1000, },
1113 };
1114
1115 /* can't be const, mac80211 writes to this */
1116 static struct ieee80211_channel wl1251_channels[] = {
1117         { .hw_value = 1, .center_freq = 2412},
1118         { .hw_value = 2, .center_freq = 2417},
1119         { .hw_value = 3, .center_freq = 2422},
1120         { .hw_value = 4, .center_freq = 2427},
1121         { .hw_value = 5, .center_freq = 2432},
1122         { .hw_value = 6, .center_freq = 2437},
1123         { .hw_value = 7, .center_freq = 2442},
1124         { .hw_value = 8, .center_freq = 2447},
1125         { .hw_value = 9, .center_freq = 2452},
1126         { .hw_value = 10, .center_freq = 2457},
1127         { .hw_value = 11, .center_freq = 2462},
1128         { .hw_value = 12, .center_freq = 2467},
1129         { .hw_value = 13, .center_freq = 2472},
1130 };
1131
1132 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1133                              const struct ieee80211_tx_queue_params *params)
1134 {
1135         enum wl1251_acx_ps_scheme ps_scheme;
1136         struct wl1251 *wl = hw->priv;
1137         int ret;
1138
1139         mutex_lock(&wl->mutex);
1140
1141         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1142
1143         ret = wl1251_ps_elp_wakeup(wl);
1144         if (ret < 0)
1145                 goto out;
1146
1147         /* mac80211 uses units of 32 usec */
1148         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1149                                 params->cw_min, params->cw_max,
1150                                 params->aifs, params->txop * 32);
1151         if (ret < 0)
1152                 goto out_sleep;
1153
1154         if (params->uapsd)
1155                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1156         else
1157                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1158
1159         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1160                                  CHANNEL_TYPE_EDCF,
1161                                  wl1251_tx_get_queue(queue), ps_scheme,
1162                                  WL1251_ACX_ACK_POLICY_LEGACY);
1163         if (ret < 0)
1164                 goto out_sleep;
1165
1166 out_sleep:
1167         wl1251_ps_elp_sleep(wl);
1168
1169 out:
1170         mutex_unlock(&wl->mutex);
1171
1172         return ret;
1173 }
1174
1175 /* can't be const, mac80211 writes to this */
1176 static struct ieee80211_supported_band wl1251_band_2ghz = {
1177         .channels = wl1251_channels,
1178         .n_channels = ARRAY_SIZE(wl1251_channels),
1179         .bitrates = wl1251_rates,
1180         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1181 };
1182
1183 static const struct ieee80211_ops wl1251_ops = {
1184         .start = wl1251_op_start,
1185         .stop = wl1251_op_stop,
1186         .add_interface = wl1251_op_add_interface,
1187         .remove_interface = wl1251_op_remove_interface,
1188         .config = wl1251_op_config,
1189         .configure_filter = wl1251_op_configure_filter,
1190         .tx = wl1251_op_tx,
1191         .set_key = wl1251_op_set_key,
1192         .hw_scan = wl1251_op_hw_scan,
1193         .bss_info_changed = wl1251_op_bss_info_changed,
1194         .set_rts_threshold = wl1251_op_set_rts_threshold,
1195         .conf_tx = wl1251_op_conf_tx,
1196 };
1197
1198 static int wl1251_register_hw(struct wl1251 *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                 wl1251_error("unable to register mac80211 hw: %d", ret);
1210                 return ret;
1211         }
1212
1213         wl->mac80211_registered = true;
1214
1215         wl1251_notice("loaded");
1216
1217         return 0;
1218 }
1219
1220 int wl1251_init_ieee80211(struct wl1251 *wl)
1221 {
1222         int ret;
1223
1224         /* The tx descriptor buffer and the TKIP space */
1225         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1226                 + WL1251_TKIP_IV_SPACE;
1227
1228         /* unit us */
1229         /* FIXME: find a proper value */
1230         wl->hw->channel_change_time = 10000;
1231
1232         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1233                 IEEE80211_HW_NOISE_DBM |
1234                 IEEE80211_HW_SUPPORTS_PS |
1235                 IEEE80211_HW_BEACON_FILTER |
1236                 IEEE80211_HW_SUPPORTS_UAPSD;
1237
1238         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1239         wl->hw->wiphy->max_scan_ssids = 1;
1240         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1241
1242         wl->hw->queues = 4;
1243
1244         ret = wl1251_register_hw(wl);
1245         if (ret)
1246                 goto out;
1247
1248         wl1251_debugfs_init(wl);
1249         wl1251_notice("initialized");
1250
1251         ret = 0;
1252
1253 out:
1254         return ret;
1255 }
1256 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1257
1258 struct ieee80211_hw *wl1251_alloc_hw(void)
1259 {
1260         struct ieee80211_hw *hw;
1261         struct wl1251 *wl;
1262         int i;
1263         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1264
1265         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1266         if (!hw) {
1267                 wl1251_error("could not alloc ieee80211_hw");
1268                 return ERR_PTR(-ENOMEM);
1269         }
1270
1271         wl = hw->priv;
1272         memset(wl, 0, sizeof(*wl));
1273
1274         wl->hw = hw;
1275
1276         wl->data_in_count = 0;
1277
1278         skb_queue_head_init(&wl->tx_queue);
1279
1280         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1281         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1282         wl->channel = WL1251_DEFAULT_CHANNEL;
1283         wl->scanning = false;
1284         wl->default_key = 0;
1285         wl->listen_int = 1;
1286         wl->rx_counter = 0;
1287         wl->rx_handled = 0;
1288         wl->rx_current_buffer = 0;
1289         wl->rx_last_id = 0;
1290         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1291         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1292         wl->elp = false;
1293         wl->psm = 0;
1294         wl->psm_requested = false;
1295         wl->tx_queue_stopped = false;
1296         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1297         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1298         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1299         wl->vif = NULL;
1300
1301         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1302                 wl->tx_frames[i] = NULL;
1303
1304         wl->next_tx_complete = 0;
1305
1306         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1307         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1308
1309         /*
1310          * In case our MAC address is not correctly set,
1311          * we use a random but Nokia MAC.
1312          */
1313         memcpy(wl->mac_addr, nokia_oui, 3);
1314         get_random_bytes(wl->mac_addr + 3, 3);
1315
1316         wl->state = WL1251_STATE_OFF;
1317         mutex_init(&wl->mutex);
1318
1319         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1320         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1321
1322         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1323         if (!wl->rx_descriptor) {
1324                 wl1251_error("could not allocate memory for rx descriptor");
1325                 ieee80211_free_hw(hw);
1326                 return ERR_PTR(-ENOMEM);
1327         }
1328
1329         return hw;
1330 }
1331 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1332
1333 int wl1251_free_hw(struct wl1251 *wl)
1334 {
1335         ieee80211_unregister_hw(wl->hw);
1336
1337         wl1251_debugfs_exit(wl);
1338
1339         kfree(wl->target_mem_map);
1340         kfree(wl->data_path);
1341         vfree(wl->fw);
1342         wl->fw = NULL;
1343         kfree(wl->nvs);
1344         wl->nvs = NULL;
1345
1346         kfree(wl->rx_descriptor);
1347         wl->rx_descriptor = NULL;
1348
1349         ieee80211_free_hw(wl->hw);
1350
1351         return 0;
1352 }
1353 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1354
1355 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1356 MODULE_LICENSE("GPL");
1357 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1358 MODULE_ALIAS("spi:wl1251");
1359 MODULE_FIRMWARE(WL1251_FW_NAME);