drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "io.h"
  36 #include "cmd.h"
  37 #include "event.h"
  38 #include "tx.h"
  39 #include "rx.h"
  40 #include "ps.h"
  41 #include "init.h"
  42 #include "debugfs.h"
  43 #include "boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static int wl1251_power_off(struct wl1251 *wl)
  56 {
  57         return wl->if_ops->power(wl, false);
  58 }
  59
  60 static int wl1251_power_on(struct wl1251 *wl)
  61 {
  62         return wl->if_ops->power(wl, true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = vmalloc(wl->fw_len);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         ret = 0;
 134
 135 out:
 136         release_firmware(fw);
 137
 138         return ret;
 139 }
 140
 141 static void wl1251_fw_wakeup(struct wl1251 *wl)
 142 {
 143         u32 elp_reg;
 144
 145         elp_reg = ELPCTRL_WAKE_UP;
 146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 148
 149         if (!(elp_reg & ELPCTRL_WLAN_READY))
 150                 wl1251_warning("WLAN not ready");
 151 }
 152
 153 static int wl1251_chip_wakeup(struct wl1251 *wl)
 154 {
 155         int ret;
 156
 157         ret = wl1251_power_on(wl);
 158         if (ret < 0)
 159                 return ret;
 160
 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         if (wl->nvs == NULL && !wl->use_eeprom) {
 205                 /* No NVS from netlink, try to get it from the filesystem */
 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_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 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         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 344         if (ret < 0)
 345                 wl1251_warning("join timeout");
 346
 347 out:
 348         return ret;
 349 }
 350
 351 static void wl1251_filter_work(struct work_struct *work)
 352 {
 353         struct wl1251 *wl =
 354                 container_of(work, struct wl1251, filter_work);
 355         int ret;
 356
 357         mutex_lock(&wl->mutex);
 358
 359         if (wl->state == WL1251_STATE_OFF)
 360                 goto out;
 361
 362         ret = wl1251_ps_elp_wakeup(wl);
 363         if (ret < 0)
 364                 goto out;
 365
 366         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 367                           wl->dtim_period);
 368         if (ret < 0)
 369                 goto out_sleep;
 370
 371 out_sleep:
 372         wl1251_ps_elp_sleep(wl);
 373
 374 out:
 375         mutex_unlock(&wl->mutex);
 376 }
 377
 378 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 379 {
 380         struct wl1251 *wl = hw->priv;
 381         unsigned long flags;
 382
 383         skb_queue_tail(&wl->tx_queue, skb);
 384
 385         /*
 386          * The chip specific setup must run before the first TX packet -
 387          * before that, the tx_work will not be initialized!
 388          */
 389
 390         ieee80211_queue_work(wl->hw, &wl->tx_work);
 391
 392         /*
 393          * The workqueue is slow to process the tx_queue and we need stop
 394          * the queue here, otherwise the queue will get too long.
 395          */
 396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 398
 399                 spin_lock_irqsave(&wl->wl_lock, flags);
 400                 ieee80211_stop_queues(wl->hw);
 401                 wl->tx_queue_stopped = true;
 402                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 403         }
 404 }
 405
 406 static int wl1251_op_start(struct ieee80211_hw *hw)
 407 {
 408         struct wl1251 *wl = hw->priv;
 409         struct wiphy *wiphy = hw->wiphy;
 410         int ret = 0;
 411
 412         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 413
 414         mutex_lock(&wl->mutex);
 415
 416         if (wl->state != WL1251_STATE_OFF) {
 417                 wl1251_error("cannot start because not in off state: %d",
 418                              wl->state);
 419                 ret = -EBUSY;
 420                 goto out;
 421         }
 422
 423         ret = wl1251_chip_wakeup(wl);
 424         if (ret < 0)
 425                 goto out;
 426
 427         ret = wl1251_boot(wl);
 428         if (ret < 0)
 429                 goto out;
 430
 431         ret = wl1251_hw_init(wl);
 432         if (ret < 0)
 433                 goto out;
 434
 435         ret = wl1251_acx_station_id(wl);
 436         if (ret < 0)
 437                 goto out;
 438
 439         wl->state = WL1251_STATE_ON;
 440
 441         wl1251_info("firmware booted (%s)", wl->fw_ver);
 442
 443         /* update hw/fw version info in wiphy struct */
 444         wiphy->hw_version = wl->chip_id;
 445         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 446
 447 out:
 448         if (ret < 0)
 449                 wl1251_power_off(wl);
 450
 451         mutex_unlock(&wl->mutex);
 452
 453         return ret;
 454 }
 455
 456 static void wl1251_op_stop(struct ieee80211_hw *hw)
 457 {
 458         struct wl1251 *wl = hw->priv;
 459
 460         wl1251_info("down");
 461
 462         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 463
 464         mutex_lock(&wl->mutex);
 465
 466         WARN_ON(wl->state != WL1251_STATE_ON);
 467
 468         if (wl->scanning) {
 469                 ieee80211_scan_completed(wl->hw, true);
 470                 wl->scanning = false;
 471         }
 472
 473         wl->state = WL1251_STATE_OFF;
 474
 475         wl1251_disable_interrupts(wl);
 476
 477         mutex_unlock(&wl->mutex);
 478
 479         cancel_work_sync(&wl->irq_work);
 480         cancel_work_sync(&wl->tx_work);
 481         cancel_work_sync(&wl->filter_work);
 482         cancel_delayed_work_sync(&wl->elp_work);
 483
 484         mutex_lock(&wl->mutex);
 485
 486         /* let's notify MAC80211 about the remaining pending TX frames */
 487         wl1251_tx_flush(wl);
 488         wl1251_power_off(wl);
 489
 490         memset(wl->bssid, 0, ETH_ALEN);
 491         wl->listen_int = 1;
 492         wl->bss_type = MAX_BSS_TYPE;
 493
 494         wl->data_in_count = 0;
 495         wl->rx_counter = 0;
 496         wl->rx_handled = 0;
 497         wl->rx_current_buffer = 0;
 498         wl->rx_last_id = 0;
 499         wl->next_tx_complete = 0;
 500         wl->elp = false;
 501         wl->station_mode = STATION_ACTIVE_MODE;
 502         wl->tx_queue_stopped = false;
 503         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 504         wl->rssi_thold = 0;
 505         wl->channel = WL1251_DEFAULT_CHANNEL;
 506
 507         wl1251_debugfs_reset(wl);
 508
 509         mutex_unlock(&wl->mutex);
 510 }
 511
 512 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 513                                    struct ieee80211_vif *vif)
 514 {
 515         struct wl1251 *wl = hw->priv;
 516         int ret = 0;
 517
 518         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 519                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 520
 521         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 522                      vif->type, vif->addr);
 523
 524         mutex_lock(&wl->mutex);
 525         if (wl->vif) {
 526                 ret = -EBUSY;
 527                 goto out;
 528         }
 529
 530         wl->vif = vif;
 531
 532         switch (vif->type) {
 533         case NL80211_IFTYPE_STATION:
 534                 wl->bss_type = BSS_TYPE_STA_BSS;
 535                 break;
 536         case NL80211_IFTYPE_ADHOC:
 537                 wl->bss_type = BSS_TYPE_IBSS;
 538                 break;
 539         default:
 540                 ret = -EOPNOTSUPP;
 541                 goto out;
 542         }
 543
 544         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 545                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 546                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 547                 ret = wl1251_acx_station_id(wl);
 548                 if (ret < 0)
 549                         goto out;
 550         }
 551
 552 out:
 553         mutex_unlock(&wl->mutex);
 554         return ret;
 555 }
 556
 557 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 558                                          struct ieee80211_vif *vif)
 559 {
 560         struct wl1251 *wl = hw->priv;
 561
 562         mutex_lock(&wl->mutex);
 563         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 564         wl->vif = NULL;
 565         mutex_unlock(&wl->mutex);
 566 }
 567
 568 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 569 {
 570         struct ieee80211_qos_hdr template;
 571
 572         memset(&template, 0, sizeof(template));
 573
 574         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 575         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 576         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 577
 578         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 579                                              IEEE80211_STYPE_QOS_NULLFUNC |
 580                                              IEEE80211_FCTL_TODS);
 581
 582         /* FIXME: not sure what priority to use here */
 583         template.qos_ctrl = cpu_to_le16(0);
 584
 585         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 586                                        sizeof(template));
 587 }
 588
 589 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 590 {
 591         struct wl1251 *wl = hw->priv;
 592         struct ieee80211_conf *conf = &hw->conf;
 593         int channel, ret = 0;
 594
 595         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 596
 597         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 598                      channel,
 599                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 600                      conf->power_level);
 601
 602         mutex_lock(&wl->mutex);
 603
 604         ret = wl1251_ps_elp_wakeup(wl);
 605         if (ret < 0)
 606                 goto out;
 607
 608         if (channel != wl->channel) {
 609                 wl->channel = channel;
 610
 611                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 612                                   wl->beacon_int, wl->dtim_period);
 613                 if (ret < 0)
 614                         goto out_sleep;
 615         }
 616
 617         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 618                 wl1251_debug(DEBUG_PSM, "psm enabled");
 619
 620                 wl->psm_requested = true;
 621
 622                 wl->dtim_period = conf->ps_dtim_period;
 623
 624                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 625                                                   wl->dtim_period);
 626
 627                 /*
 628                  * mac80211 enables PSM only if we're already associated.
 629                  */
 630                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 631                 if (ret < 0)
 632                         goto out_sleep;
 633         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 634                    wl->psm_requested) {
 635                 wl1251_debug(DEBUG_PSM, "psm disabled");
 636
 637                 wl->psm_requested = false;
 638
 639                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 640                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 641                         if (ret < 0)
 642                                 goto out_sleep;
 643                 }
 644         }
 645
 646         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 647                 if (conf->flags & IEEE80211_CONF_IDLE) {
 648                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 649                         if (ret < 0)
 650                                 goto out_sleep;
 651                 } else {
 652                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 653                         if (ret < 0)
 654                                 goto out_sleep;
 655                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 656                                           wl->beacon_int, wl->dtim_period);
 657                         if (ret < 0)
 658                                 goto out_sleep;
 659                 }
 660         }
 661
 662         if (conf->power_level != wl->power_level) {
 663                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 664                 if (ret < 0)
 665                         goto out_sleep;
 666
 667                 wl->power_level = conf->power_level;
 668         }
 669
 670 out_sleep:
 671         wl1251_ps_elp_sleep(wl);
 672
 673 out:
 674         mutex_unlock(&wl->mutex);
 675
 676         return ret;
 677 }
 678
 679 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 680                                   FIF_ALLMULTI | \
 681                                   FIF_FCSFAIL | \
 682                                   FIF_BCN_PRBRESP_PROMISC | \
 683                                   FIF_CONTROL | \
 684                                   FIF_OTHER_BSS)
 685
 686 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 687                                        unsigned int changed,
 688                                        unsigned int *total,u64 multicast)
 689 {
 690         struct wl1251 *wl = hw->priv;
 691
 692         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 693
 694         *total &= WL1251_SUPPORTED_FILTERS;
 695         changed &= WL1251_SUPPORTED_FILTERS;
 696
 697         if (changed == 0)
 698                 /* no filters which we support changed */
 699                 return;
 700
 701         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 702
 703         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 704         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 705
 706         if (*total & FIF_PROMISC_IN_BSS) {
 707                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 708                 wl->rx_config |= CFG_RX_ALL_GOOD;
 709         }
 710         if (*total & FIF_ALLMULTI)
 711                 /*
 712                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 713                  * all multicast frames
 714                  */
 715                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 716         if (*total & FIF_FCSFAIL)
 717                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 718         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 719                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 720                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 721         }
 722         if (*total & FIF_CONTROL)
 723                 wl->rx_filter |= CFG_RX_CTL_EN;
 724         if (*total & FIF_OTHER_BSS)
 725                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 726
 727         /*
 728          * FIXME: workqueues need to be properly cancelled on stop(), for
 729          * now let's just disable changing the filter settings. They will
 730          * be updated any on config().
 731          */
 732         /* schedule_work(&wl->filter_work); */
 733 }
 734
 735 /* HW encryption */
 736 static int wl1251_set_key_type(struct wl1251 *wl,
 737                                struct wl1251_cmd_set_keys *key,
 738                                enum set_key_cmd cmd,
 739                                struct ieee80211_key_conf *mac80211_key,
 740                                const u8 *addr)
 741 {
 742         switch (mac80211_key->cipher) {
 743         case WLAN_CIPHER_SUITE_WEP40:
 744         case WLAN_CIPHER_SUITE_WEP104:
 745                 if (is_broadcast_ether_addr(addr))
 746                         key->key_type = KEY_WEP_DEFAULT;
 747                 else
 748                         key->key_type = KEY_WEP_ADDR;
 749
 750                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 751                 break;
 752         case WLAN_CIPHER_SUITE_TKIP:
 753                 if (is_broadcast_ether_addr(addr))
 754                         key->key_type = KEY_TKIP_MIC_GROUP;
 755                 else
 756                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 757
 758                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 759                 break;
 760         case WLAN_CIPHER_SUITE_CCMP:
 761                 if (is_broadcast_ether_addr(addr))
 762                         key->key_type = KEY_AES_GROUP;
 763                 else
 764                         key->key_type = KEY_AES_PAIRWISE;
 765                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 766                 break;
 767         default:
 768                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 769                 return -EOPNOTSUPP;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 776                              struct ieee80211_vif *vif,
 777                              struct ieee80211_sta *sta,
 778                              struct ieee80211_key_conf *key)
 779 {
 780         struct wl1251 *wl = hw->priv;
 781         struct wl1251_cmd_set_keys *wl_cmd;
 782         const u8 *addr;
 783         int ret;
 784
 785         static const u8 bcast_addr[ETH_ALEN] =
 786                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 787
 788         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 789
 790         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 791         if (!wl_cmd) {
 792                 ret = -ENOMEM;
 793                 goto out;
 794         }
 795
 796         addr = sta ? sta->addr : bcast_addr;
 797
 798         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 799         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 800         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 801                      key->cipher, key->keyidx, key->keylen, key->flags);
 802         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 803
 804         if (is_zero_ether_addr(addr)) {
 805                 /* We dont support TX only encryption */
 806                 ret = -EOPNOTSUPP;
 807                 goto out;
 808         }
 809
 810         mutex_lock(&wl->mutex);
 811
 812         ret = wl1251_ps_elp_wakeup(wl);
 813         if (ret < 0)
 814                 goto out_unlock;
 815
 816         switch (cmd) {
 817         case SET_KEY:
 818                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 819                 break;
 820         case DISABLE_KEY:
 821                 wl_cmd->key_action = KEY_REMOVE;
 822                 break;
 823         default:
 824                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 825                 break;
 826         }
 827
 828         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 829         if (ret < 0) {
 830                 wl1251_error("Set KEY type failed");
 831                 goto out_sleep;
 832         }
 833
 834         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 835                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 836
 837         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 838             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 839                 /*
 840                  * We get the key in the following form:
 841                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 842                  * but the target is expecting:
 843                  * TKIP - RX MIC - TX MIC
 844                  */
 845                 memcpy(wl_cmd->key, key->key, 16);
 846                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 847                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 848
 849         } else {
 850                 memcpy(wl_cmd->key, key->key, key->keylen);
 851         }
 852         wl_cmd->key_size = key->keylen;
 853
 854         wl_cmd->id = key->keyidx;
 855         wl_cmd->ssid_profile = 0;
 856
 857         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 858
 859         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 860         if (ret < 0) {
 861                 wl1251_warning("could not set keys");
 862                 goto out_sleep;
 863         }
 864
 865 out_sleep:
 866         wl1251_ps_elp_sleep(wl);
 867
 868 out_unlock:
 869         mutex_unlock(&wl->mutex);
 870
 871 out:
 872         kfree(wl_cmd);
 873
 874         return ret;
 875 }
 876
 877 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 878                              struct ieee80211_vif *vif,
 879                              struct cfg80211_scan_request *req)
 880 {
 881         struct wl1251 *wl = hw->priv;
 882         struct sk_buff *skb;
 883         size_t ssid_len = 0;
 884         u8 *ssid = NULL;
 885         int ret;
 886
 887         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 888
 889         if (req->n_ssids) {
 890                 ssid = req->ssids[0].ssid;
 891                 ssid_len = req->ssids[0].ssid_len;
 892         }
 893
 894         mutex_lock(&wl->mutex);
 895
 896         if (wl->scanning) {
 897                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 898                 ret = -EINVAL;
 899                 goto out;
 900         }
 901
 902         ret = wl1251_ps_elp_wakeup(wl);
 903         if (ret < 0)
 904                 goto out;
 905
 906         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 907                                      req->ie, req->ie_len);
 908         if (!skb) {
 909                 ret = -ENOMEM;
 910                 goto out;
 911         }
 912
 913         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 914                                       skb->len);
 915         dev_kfree_skb(skb);
 916         if (ret < 0)
 917                 goto out_sleep;
 918
 919         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 920         if (ret < 0)
 921                 goto out_sleep;
 922
 923         wl->scanning = true;
 924
 925         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 926                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 927         if (ret < 0) {
 928                 wl->scanning = false;
 929                 goto out_sleep;
 930         }
 931
 932 out_sleep:
 933         wl1251_ps_elp_sleep(wl);
 934
 935 out:
 936         mutex_unlock(&wl->mutex);
 937
 938         return ret;
 939 }
 940
 941 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 942 {
 943         struct wl1251 *wl = hw->priv;
 944         int ret;
 945
 946         mutex_lock(&wl->mutex);
 947
 948         ret = wl1251_ps_elp_wakeup(wl);
 949         if (ret < 0)
 950                 goto out;
 951
 952         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 953         if (ret < 0)
 954                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 955
 956         wl1251_ps_elp_sleep(wl);
 957
 958 out:
 959         mutex_unlock(&wl->mutex);
 960
 961         return ret;
 962 }
 963
 964 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 965                                        struct ieee80211_vif *vif,
 966                                        struct ieee80211_bss_conf *bss_conf,
 967                                        u32 changed)
 968 {
 969         struct wl1251 *wl = hw->priv;
 970         struct sk_buff *beacon, *skb;
 971         int ret;
 972
 973         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 974
 975         mutex_lock(&wl->mutex);
 976
 977         ret = wl1251_ps_elp_wakeup(wl);
 978         if (ret < 0)
 979                 goto out;
 980
 981         if (changed & BSS_CHANGED_CQM) {
 982                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
 983                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
 984                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
 985                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
 986                 if (ret < 0)
 987                         goto out;
 988                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
 989         }
 990
 991         if (changed & BSS_CHANGED_BSSID) {
 992                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 993
 994                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 995                 if (!skb)
 996                         goto out_sleep;
 997
 998                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 999                                               skb->data, skb->len);
1000                 dev_kfree_skb(skb);
1001                 if (ret < 0)
1002                         goto out_sleep;
1003
1004                 ret = wl1251_build_qos_null_data(wl);
1005                 if (ret < 0)
1006                         goto out;
1007
1008                 if (wl->bss_type != BSS_TYPE_IBSS) {
1009                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1010                                           wl->beacon_int, wl->dtim_period);
1011                         if (ret < 0)
1012                                 goto out_sleep;
1013                 }
1014         }
1015
1016         if (changed & BSS_CHANGED_ASSOC) {
1017                 if (bss_conf->assoc) {
1018                         wl->beacon_int = bss_conf->beacon_int;
1019
1020                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1021                         if (!skb)
1022                                 goto out_sleep;
1023
1024                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1025                                                       skb->data,
1026                                                       skb->len);
1027                         dev_kfree_skb(skb);
1028                         if (ret < 0)
1029                                 goto out_sleep;
1030
1031                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1032                         if (ret < 0)
1033                                 goto out_sleep;
1034                 } else {
1035                         /* use defaults when not associated */
1036                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1037                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1038                 }
1039         }
1040         if (changed & BSS_CHANGED_ERP_SLOT) {
1041                 if (bss_conf->use_short_slot)
1042                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1043                 else
1044                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1045                 if (ret < 0) {
1046                         wl1251_warning("Set slot time failed %d", ret);
1047                         goto out_sleep;
1048                 }
1049         }
1050
1051         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1052                 if (bss_conf->use_short_preamble)
1053                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1054                 else
1055                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1056         }
1057
1058         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1059                 if (bss_conf->use_cts_prot)
1060                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1061                 else
1062                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1063                 if (ret < 0) {
1064                         wl1251_warning("Set ctsprotect failed %d", ret);
1065                         goto out_sleep;
1066                 }
1067         }
1068
1069         if (changed & BSS_CHANGED_BEACON) {
1070                 beacon = ieee80211_beacon_get(hw, vif);
1071                 if (!beacon)
1072                         goto out_sleep;
1073
1074                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1075                                               beacon->len);
1076
1077                 if (ret < 0) {
1078                         dev_kfree_skb(beacon);
1079                         goto out_sleep;
1080                 }
1081
1082                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1083                                               beacon->len);
1084
1085                 dev_kfree_skb(beacon);
1086
1087                 if (ret < 0)
1088                         goto out_sleep;
1089
1090                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1091                                   wl->channel, wl->dtim_period);
1092
1093                 if (ret < 0)
1094                         goto out_sleep;
1095         }
1096
1097 out_sleep:
1098         wl1251_ps_elp_sleep(wl);
1099
1100 out:
1101         mutex_unlock(&wl->mutex);
1102 }
1103
1104
1105 /* can't be const, mac80211 writes to this */
1106 static struct ieee80211_rate wl1251_rates[] = {
1107         { .bitrate = 10,
1108           .hw_value = 0x1,
1109           .hw_value_short = 0x1, },
1110         { .bitrate = 20,
1111           .hw_value = 0x2,
1112           .hw_value_short = 0x2,
1113           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1114         { .bitrate = 55,
1115           .hw_value = 0x4,
1116           .hw_value_short = 0x4,
1117           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1118         { .bitrate = 110,
1119           .hw_value = 0x20,
1120           .hw_value_short = 0x20,
1121           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1122         { .bitrate = 60,
1123           .hw_value = 0x8,
1124           .hw_value_short = 0x8, },
1125         { .bitrate = 90,
1126           .hw_value = 0x10,
1127           .hw_value_short = 0x10, },
1128         { .bitrate = 120,
1129           .hw_value = 0x40,
1130           .hw_value_short = 0x40, },
1131         { .bitrate = 180,
1132           .hw_value = 0x80,
1133           .hw_value_short = 0x80, },
1134         { .bitrate = 240,
1135           .hw_value = 0x200,
1136           .hw_value_short = 0x200, },
1137         { .bitrate = 360,
1138          .hw_value = 0x400,
1139          .hw_value_short = 0x400, },
1140         { .bitrate = 480,
1141           .hw_value = 0x800,
1142           .hw_value_short = 0x800, },
1143         { .bitrate = 540,
1144           .hw_value = 0x1000,
1145           .hw_value_short = 0x1000, },
1146 };
1147
1148 /* can't be const, mac80211 writes to this */
1149 static struct ieee80211_channel wl1251_channels[] = {
1150         { .hw_value = 1, .center_freq = 2412},
1151         { .hw_value = 2, .center_freq = 2417},
1152         { .hw_value = 3, .center_freq = 2422},
1153         { .hw_value = 4, .center_freq = 2427},
1154         { .hw_value = 5, .center_freq = 2432},
1155         { .hw_value = 6, .center_freq = 2437},
1156         { .hw_value = 7, .center_freq = 2442},
1157         { .hw_value = 8, .center_freq = 2447},
1158         { .hw_value = 9, .center_freq = 2452},
1159         { .hw_value = 10, .center_freq = 2457},
1160         { .hw_value = 11, .center_freq = 2462},
1161         { .hw_value = 12, .center_freq = 2467},
1162         { .hw_value = 13, .center_freq = 2472},
1163 };
1164
1165 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1166                              struct ieee80211_vif *vif, u16 queue,
1167                              const struct ieee80211_tx_queue_params *params)
1168 {
1169         enum wl1251_acx_ps_scheme ps_scheme;
1170         struct wl1251 *wl = hw->priv;
1171         int ret;
1172
1173         mutex_lock(&wl->mutex);
1174
1175         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1176
1177         ret = wl1251_ps_elp_wakeup(wl);
1178         if (ret < 0)
1179                 goto out;
1180
1181         /* mac80211 uses units of 32 usec */
1182         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1183                                 params->cw_min, params->cw_max,
1184                                 params->aifs, params->txop * 32);
1185         if (ret < 0)
1186                 goto out_sleep;
1187
1188         if (params->uapsd)
1189                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1190         else
1191                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1192
1193         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1194                                  CHANNEL_TYPE_EDCF,
1195                                  wl1251_tx_get_queue(queue), ps_scheme,
1196                                  WL1251_ACX_ACK_POLICY_LEGACY);
1197         if (ret < 0)
1198                 goto out_sleep;
1199
1200 out_sleep:
1201         wl1251_ps_elp_sleep(wl);
1202
1203 out:
1204         mutex_unlock(&wl->mutex);
1205
1206         return ret;
1207 }
1208
1209 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1210                                 struct survey_info *survey)
1211 {
1212         struct wl1251 *wl = hw->priv;
1213         struct ieee80211_conf *conf = &hw->conf;
1214
1215         if (idx != 0)
1216                 return -ENOENT;
1217
1218         survey->channel = conf->channel;
1219         survey->filled = SURVEY_INFO_NOISE_DBM;
1220         survey->noise = wl->noise;
1221
1222         return 0;
1223 }
1224
1225 /* can't be const, mac80211 writes to this */
1226 static struct ieee80211_supported_band wl1251_band_2ghz = {
1227         .channels = wl1251_channels,
1228         .n_channels = ARRAY_SIZE(wl1251_channels),
1229         .bitrates = wl1251_rates,
1230         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1231 };
1232
1233 static const struct ieee80211_ops wl1251_ops = {
1234         .start = wl1251_op_start,
1235         .stop = wl1251_op_stop,
1236         .add_interface = wl1251_op_add_interface,
1237         .remove_interface = wl1251_op_remove_interface,
1238         .config = wl1251_op_config,
1239         .configure_filter = wl1251_op_configure_filter,
1240         .tx = wl1251_op_tx,
1241         .set_key = wl1251_op_set_key,
1242         .hw_scan = wl1251_op_hw_scan,
1243         .bss_info_changed = wl1251_op_bss_info_changed,
1244         .set_rts_threshold = wl1251_op_set_rts_threshold,
1245         .conf_tx = wl1251_op_conf_tx,
1246         .get_survey = wl1251_op_get_survey,
1247 };
1248
1249 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1250 {
1251         unsigned long timeout;
1252
1253         wl1251_reg_write32(wl, EE_ADDR, offset);
1254         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1255
1256         /* EE_CTL_READ clears when data is ready */
1257         timeout = jiffies + msecs_to_jiffies(100);
1258         while (1) {
1259                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1260                         break;
1261
1262                 if (time_after(jiffies, timeout))
1263                         return -ETIMEDOUT;
1264
1265                 msleep(1);
1266         }
1267
1268         *data = wl1251_reg_read32(wl, EE_DATA);
1269         return 0;
1270 }
1271
1272 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1273                               u8 *data, size_t len)
1274 {
1275         size_t i;
1276         int ret;
1277
1278         wl1251_reg_write32(wl, EE_START, 0);
1279
1280         for (i = 0; i < len; i++) {
1281                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1282                 if (ret < 0)
1283                         return ret;
1284         }
1285
1286         return 0;
1287 }
1288
1289 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1290 {
1291         u8 mac[ETH_ALEN];
1292         int i, ret;
1293
1294         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1295
1296         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1297         if (ret < 0) {
1298                 wl1251_warning("failed to read MAC address from EEPROM");
1299                 return ret;
1300         }
1301
1302         /* MAC is stored in reverse order */
1303         for (i = 0; i < ETH_ALEN; i++)
1304                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1305
1306         return 0;
1307 }
1308
1309 static int wl1251_register_hw(struct wl1251 *wl)
1310 {
1311         int ret;
1312
1313         if (wl->mac80211_registered)
1314                 return 0;
1315
1316         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1317
1318         ret = ieee80211_register_hw(wl->hw);
1319         if (ret < 0) {
1320                 wl1251_error("unable to register mac80211 hw: %d", ret);
1321                 return ret;
1322         }
1323
1324         wl->mac80211_registered = true;
1325
1326         wl1251_notice("loaded");
1327
1328         return 0;
1329 }
1330
1331 int wl1251_init_ieee80211(struct wl1251 *wl)
1332 {
1333         int ret;
1334
1335         /* The tx descriptor buffer and the TKIP space */
1336         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1337                 + WL1251_TKIP_IV_SPACE;
1338
1339         /* unit us */
1340         /* FIXME: find a proper value */
1341         wl->hw->channel_change_time = 10000;
1342
1343         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1344                 IEEE80211_HW_SUPPORTS_PS |
1345                 IEEE80211_HW_SUPPORTS_UAPSD;
1346
1347         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1348                                          BIT(NL80211_IFTYPE_ADHOC);
1349         wl->hw->wiphy->max_scan_ssids = 1;
1350         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1351
1352         wl->hw->queues = 4;
1353
1354         if (wl->use_eeprom)
1355                 wl1251_read_eeprom_mac(wl);
1356
1357         ret = wl1251_register_hw(wl);
1358         if (ret)
1359                 goto out;
1360
1361         wl1251_debugfs_init(wl);
1362         wl1251_notice("initialized");
1363
1364         ret = 0;
1365
1366 out:
1367         return ret;
1368 }
1369 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1370
1371 struct ieee80211_hw *wl1251_alloc_hw(void)
1372 {
1373         struct ieee80211_hw *hw;
1374         struct wl1251 *wl;
1375         int i;
1376         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1377
1378         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1379         if (!hw) {
1380                 wl1251_error("could not alloc ieee80211_hw");
1381                 return ERR_PTR(-ENOMEM);
1382         }
1383
1384         wl = hw->priv;
1385         memset(wl, 0, sizeof(*wl));
1386
1387         wl->hw = hw;
1388
1389         wl->data_in_count = 0;
1390
1391         skb_queue_head_init(&wl->tx_queue);
1392
1393         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1394         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1395         wl->channel = WL1251_DEFAULT_CHANNEL;
1396         wl->scanning = false;
1397         wl->default_key = 0;
1398         wl->listen_int = 1;
1399         wl->rx_counter = 0;
1400         wl->rx_handled = 0;
1401         wl->rx_current_buffer = 0;
1402         wl->rx_last_id = 0;
1403         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1404         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1405         wl->elp = false;
1406         wl->station_mode = STATION_ACTIVE_MODE;
1407         wl->psm_requested = false;
1408         wl->tx_queue_stopped = false;
1409         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1410         wl->rssi_thold = 0;
1411         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1412         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1413         wl->vif = NULL;
1414
1415         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1416                 wl->tx_frames[i] = NULL;
1417
1418         wl->next_tx_complete = 0;
1419
1420         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1421         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1422
1423         /*
1424          * In case our MAC address is not correctly set,
1425          * we use a random but Nokia MAC.
1426          */
1427         memcpy(wl->mac_addr, nokia_oui, 3);
1428         get_random_bytes(wl->mac_addr + 3, 3);
1429
1430         wl->state = WL1251_STATE_OFF;
1431         mutex_init(&wl->mutex);
1432
1433         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1434         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1435
1436         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1437         if (!wl->rx_descriptor) {
1438                 wl1251_error("could not allocate memory for rx descriptor");
1439                 ieee80211_free_hw(hw);
1440                 return ERR_PTR(-ENOMEM);
1441         }
1442
1443         return hw;
1444 }
1445 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1446
1447 int wl1251_free_hw(struct wl1251 *wl)
1448 {
1449         ieee80211_unregister_hw(wl->hw);
1450
1451         wl1251_debugfs_exit(wl);
1452
1453         kfree(wl->target_mem_map);
1454         kfree(wl->data_path);
1455         vfree(wl->fw);
1456         wl->fw = NULL;
1457         kfree(wl->nvs);
1458         wl->nvs = NULL;
1459
1460         kfree(wl->rx_descriptor);
1461         wl->rx_descriptor = NULL;
1462
1463         ieee80211_free_hw(wl->hw);
1464
1465         return 0;
1466 }
1467 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1468
1469 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1470 MODULE_LICENSE("GPL");
1471 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1472 MODULE_FIRMWARE(WL1251_FW_NAME);