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         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 519                      vif->type, vif->addr);
 520
 521         mutex_lock(&wl->mutex);
 522         if (wl->vif) {
 523                 ret = -EBUSY;
 524                 goto out;
 525         }
 526
 527         wl->vif = vif;
 528
 529         switch (vif->type) {
 530         case NL80211_IFTYPE_STATION:
 531                 wl->bss_type = BSS_TYPE_STA_BSS;
 532                 break;
 533         case NL80211_IFTYPE_ADHOC:
 534                 wl->bss_type = BSS_TYPE_IBSS;
 535                 break;
 536         default:
 537                 ret = -EOPNOTSUPP;
 538                 goto out;
 539         }
 540
 541         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 542                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 543                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 544                 ret = wl1251_acx_station_id(wl);
 545                 if (ret < 0)
 546                         goto out;
 547         }
 548
 549 out:
 550         mutex_unlock(&wl->mutex);
 551         return ret;
 552 }
 553
 554 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 555                                          struct ieee80211_vif *vif)
 556 {
 557         struct wl1251 *wl = hw->priv;
 558
 559         mutex_lock(&wl->mutex);
 560         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 561         wl->vif = NULL;
 562         mutex_unlock(&wl->mutex);
 563 }
 564
 565 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 566 {
 567         struct ieee80211_qos_hdr template;
 568
 569         memset(&template, 0, sizeof(template));
 570
 571         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 572         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 573         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 574
 575         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 576                                              IEEE80211_STYPE_QOS_NULLFUNC |
 577                                              IEEE80211_FCTL_TODS);
 578
 579         /* FIXME: not sure what priority to use here */
 580         template.qos_ctrl = cpu_to_le16(0);
 581
 582         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 583                                        sizeof(template));
 584 }
 585
 586 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 587 {
 588         struct wl1251 *wl = hw->priv;
 589         struct ieee80211_conf *conf = &hw->conf;
 590         int channel, ret = 0;
 591
 592         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 593
 594         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 595                      channel,
 596                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 597                      conf->power_level);
 598
 599         mutex_lock(&wl->mutex);
 600
 601         ret = wl1251_ps_elp_wakeup(wl);
 602         if (ret < 0)
 603                 goto out;
 604
 605         if (channel != wl->channel) {
 606                 wl->channel = channel;
 607
 608                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 609                                   wl->beacon_int, wl->dtim_period);
 610                 if (ret < 0)
 611                         goto out_sleep;
 612         }
 613
 614         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 615                 wl1251_debug(DEBUG_PSM, "psm enabled");
 616
 617                 wl->psm_requested = true;
 618
 619                 wl->dtim_period = conf->ps_dtim_period;
 620
 621                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 622                                                   wl->dtim_period);
 623
 624                 /*
 625                  * mac80211 enables PSM only if we're already associated.
 626                  */
 627                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 628                 if (ret < 0)
 629                         goto out_sleep;
 630         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 631                    wl->psm_requested) {
 632                 wl1251_debug(DEBUG_PSM, "psm disabled");
 633
 634                 wl->psm_requested = false;
 635
 636                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 637                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 638                         if (ret < 0)
 639                                 goto out_sleep;
 640                 }
 641         }
 642
 643         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 644                 if (conf->flags & IEEE80211_CONF_IDLE) {
 645                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 646                         if (ret < 0)
 647                                 goto out_sleep;
 648                 } else {
 649                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 650                         if (ret < 0)
 651                                 goto out_sleep;
 652                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 653                                           wl->beacon_int, wl->dtim_period);
 654                         if (ret < 0)
 655                                 goto out_sleep;
 656                 }
 657         }
 658
 659         if (conf->power_level != wl->power_level) {
 660                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 661                 if (ret < 0)
 662                         goto out_sleep;
 663
 664                 wl->power_level = conf->power_level;
 665         }
 666
 667 out_sleep:
 668         wl1251_ps_elp_sleep(wl);
 669
 670 out:
 671         mutex_unlock(&wl->mutex);
 672
 673         return ret;
 674 }
 675
 676 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 677                                   FIF_ALLMULTI | \
 678                                   FIF_FCSFAIL | \
 679                                   FIF_BCN_PRBRESP_PROMISC | \
 680                                   FIF_CONTROL | \
 681                                   FIF_OTHER_BSS)
 682
 683 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 684                                        unsigned int changed,
 685                                        unsigned int *total,u64 multicast)
 686 {
 687         struct wl1251 *wl = hw->priv;
 688
 689         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 690
 691         *total &= WL1251_SUPPORTED_FILTERS;
 692         changed &= WL1251_SUPPORTED_FILTERS;
 693
 694         if (changed == 0)
 695                 /* no filters which we support changed */
 696                 return;
 697
 698         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 699
 700         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 701         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 702
 703         if (*total & FIF_PROMISC_IN_BSS) {
 704                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 705                 wl->rx_config |= CFG_RX_ALL_GOOD;
 706         }
 707         if (*total & FIF_ALLMULTI)
 708                 /*
 709                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 710                  * all multicast frames
 711                  */
 712                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 713         if (*total & FIF_FCSFAIL)
 714                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 715         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 716                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 717                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 718         }
 719         if (*total & FIF_CONTROL)
 720                 wl->rx_filter |= CFG_RX_CTL_EN;
 721         if (*total & FIF_OTHER_BSS)
 722                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 723
 724         /*
 725          * FIXME: workqueues need to be properly cancelled on stop(), for
 726          * now let's just disable changing the filter settings. They will
 727          * be updated any on config().
 728          */
 729         /* schedule_work(&wl->filter_work); */
 730 }
 731
 732 /* HW encryption */
 733 static int wl1251_set_key_type(struct wl1251 *wl,
 734                                struct wl1251_cmd_set_keys *key,
 735                                enum set_key_cmd cmd,
 736                                struct ieee80211_key_conf *mac80211_key,
 737                                const u8 *addr)
 738 {
 739         switch (mac80211_key->cipher) {
 740         case WLAN_CIPHER_SUITE_WEP40:
 741         case WLAN_CIPHER_SUITE_WEP104:
 742                 if (is_broadcast_ether_addr(addr))
 743                         key->key_type = KEY_WEP_DEFAULT;
 744                 else
 745                         key->key_type = KEY_WEP_ADDR;
 746
 747                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 748                 break;
 749         case WLAN_CIPHER_SUITE_TKIP:
 750                 if (is_broadcast_ether_addr(addr))
 751                         key->key_type = KEY_TKIP_MIC_GROUP;
 752                 else
 753                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 754
 755                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 756                 break;
 757         case WLAN_CIPHER_SUITE_CCMP:
 758                 if (is_broadcast_ether_addr(addr))
 759                         key->key_type = KEY_AES_GROUP;
 760                 else
 761                         key->key_type = KEY_AES_PAIRWISE;
 762                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 763                 break;
 764         default:
 765                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 766                 return -EOPNOTSUPP;
 767         }
 768
 769         return 0;
 770 }
 771
 772 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 773                              struct ieee80211_vif *vif,
 774                              struct ieee80211_sta *sta,
 775                              struct ieee80211_key_conf *key)
 776 {
 777         struct wl1251 *wl = hw->priv;
 778         struct wl1251_cmd_set_keys *wl_cmd;
 779         const u8 *addr;
 780         int ret;
 781
 782         static const u8 bcast_addr[ETH_ALEN] =
 783                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 784
 785         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 786
 787         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 788         if (!wl_cmd) {
 789                 ret = -ENOMEM;
 790                 goto out;
 791         }
 792
 793         addr = sta ? sta->addr : bcast_addr;
 794
 795         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 796         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 797         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 798                      key->cipher, key->keyidx, key->keylen, key->flags);
 799         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 800
 801         if (is_zero_ether_addr(addr)) {
 802                 /* We dont support TX only encryption */
 803                 ret = -EOPNOTSUPP;
 804                 goto out;
 805         }
 806
 807         mutex_lock(&wl->mutex);
 808
 809         ret = wl1251_ps_elp_wakeup(wl);
 810         if (ret < 0)
 811                 goto out_unlock;
 812
 813         switch (cmd) {
 814         case SET_KEY:
 815                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 816                 break;
 817         case DISABLE_KEY:
 818                 wl_cmd->key_action = KEY_REMOVE;
 819                 break;
 820         default:
 821                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 822                 break;
 823         }
 824
 825         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 826         if (ret < 0) {
 827                 wl1251_error("Set KEY type failed");
 828                 goto out_sleep;
 829         }
 830
 831         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 832                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 833
 834         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 835             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 836                 /*
 837                  * We get the key in the following form:
 838                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 839                  * but the target is expecting:
 840                  * TKIP - RX MIC - TX MIC
 841                  */
 842                 memcpy(wl_cmd->key, key->key, 16);
 843                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 844                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 845
 846         } else {
 847                 memcpy(wl_cmd->key, key->key, key->keylen);
 848         }
 849         wl_cmd->key_size = key->keylen;
 850
 851         wl_cmd->id = key->keyidx;
 852         wl_cmd->ssid_profile = 0;
 853
 854         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 855
 856         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 857         if (ret < 0) {
 858                 wl1251_warning("could not set keys");
 859                 goto out_sleep;
 860         }
 861
 862 out_sleep:
 863         wl1251_ps_elp_sleep(wl);
 864
 865 out_unlock:
 866         mutex_unlock(&wl->mutex);
 867
 868 out:
 869         kfree(wl_cmd);
 870
 871         return ret;
 872 }
 873
 874 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 875                              struct ieee80211_vif *vif,
 876                              struct cfg80211_scan_request *req)
 877 {
 878         struct wl1251 *wl = hw->priv;
 879         struct sk_buff *skb;
 880         size_t ssid_len = 0;
 881         u8 *ssid = NULL;
 882         int ret;
 883
 884         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 885
 886         if (req->n_ssids) {
 887                 ssid = req->ssids[0].ssid;
 888                 ssid_len = req->ssids[0].ssid_len;
 889         }
 890
 891         mutex_lock(&wl->mutex);
 892
 893         if (wl->scanning) {
 894                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 895                 ret = -EINVAL;
 896                 goto out;
 897         }
 898
 899         ret = wl1251_ps_elp_wakeup(wl);
 900         if (ret < 0)
 901                 goto out;
 902
 903         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 904                                      req->ie, req->ie_len);
 905         if (!skb) {
 906                 ret = -ENOMEM;
 907                 goto out;
 908         }
 909
 910         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 911                                       skb->len);
 912         dev_kfree_skb(skb);
 913         if (ret < 0)
 914                 goto out_sleep;
 915
 916         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 917         if (ret < 0)
 918                 goto out_sleep;
 919
 920         wl->scanning = true;
 921
 922         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 923                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 924         if (ret < 0) {
 925                 wl->scanning = false;
 926                 goto out_sleep;
 927         }
 928
 929 out_sleep:
 930         wl1251_ps_elp_sleep(wl);
 931
 932 out:
 933         mutex_unlock(&wl->mutex);
 934
 935         return ret;
 936 }
 937
 938 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 939 {
 940         struct wl1251 *wl = hw->priv;
 941         int ret;
 942
 943         mutex_lock(&wl->mutex);
 944
 945         ret = wl1251_ps_elp_wakeup(wl);
 946         if (ret < 0)
 947                 goto out;
 948
 949         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 950         if (ret < 0)
 951                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 952
 953         wl1251_ps_elp_sleep(wl);
 954
 955 out:
 956         mutex_unlock(&wl->mutex);
 957
 958         return ret;
 959 }
 960
 961 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 962                                        struct ieee80211_vif *vif,
 963                                        struct ieee80211_bss_conf *bss_conf,
 964                                        u32 changed)
 965 {
 966         struct wl1251 *wl = hw->priv;
 967         struct sk_buff *beacon, *skb;
 968         int ret;
 969
 970         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 971
 972         mutex_lock(&wl->mutex);
 973
 974         ret = wl1251_ps_elp_wakeup(wl);
 975         if (ret < 0)
 976                 goto out;
 977
 978         if (changed & BSS_CHANGED_CQM) {
 979                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
 980                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
 981                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
 982                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
 983                 if (ret < 0)
 984                         goto out;
 985                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
 986         }
 987
 988         if (changed & BSS_CHANGED_BSSID) {
 989                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 990
 991                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 992                 if (!skb)
 993                         goto out_sleep;
 994
 995                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 996                                               skb->data, skb->len);
 997                 dev_kfree_skb(skb);
 998                 if (ret < 0)
 999                         goto out_sleep;
1000
1001                 ret = wl1251_build_qos_null_data(wl);
1002                 if (ret < 0)
1003                         goto out;
1004
1005                 if (wl->bss_type != BSS_TYPE_IBSS) {
1006                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1007                                           wl->beacon_int, wl->dtim_period);
1008                         if (ret < 0)
1009                                 goto out_sleep;
1010                 }
1011         }
1012
1013         if (changed & BSS_CHANGED_ASSOC) {
1014                 if (bss_conf->assoc) {
1015                         wl->beacon_int = bss_conf->beacon_int;
1016
1017                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1018                         if (!skb)
1019                                 goto out_sleep;
1020
1021                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1022                                                       skb->data,
1023                                                       skb->len);
1024                         dev_kfree_skb(skb);
1025                         if (ret < 0)
1026                                 goto out_sleep;
1027
1028                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1029                         if (ret < 0)
1030                                 goto out_sleep;
1031                 } else {
1032                         /* use defaults when not associated */
1033                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1034                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1035                 }
1036         }
1037         if (changed & BSS_CHANGED_ERP_SLOT) {
1038                 if (bss_conf->use_short_slot)
1039                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1040                 else
1041                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1042                 if (ret < 0) {
1043                         wl1251_warning("Set slot time failed %d", ret);
1044                         goto out_sleep;
1045                 }
1046         }
1047
1048         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1049                 if (bss_conf->use_short_preamble)
1050                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1051                 else
1052                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1053         }
1054
1055         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1056                 if (bss_conf->use_cts_prot)
1057                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1058                 else
1059                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1060                 if (ret < 0) {
1061                         wl1251_warning("Set ctsprotect failed %d", ret);
1062                         goto out_sleep;
1063                 }
1064         }
1065
1066         if (changed & BSS_CHANGED_BEACON) {
1067                 beacon = ieee80211_beacon_get(hw, vif);
1068                 if (!beacon)
1069                         goto out_sleep;
1070
1071                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1072                                               beacon->len);
1073
1074                 if (ret < 0) {
1075                         dev_kfree_skb(beacon);
1076                         goto out_sleep;
1077                 }
1078
1079                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1080                                               beacon->len);
1081
1082                 dev_kfree_skb(beacon);
1083
1084                 if (ret < 0)
1085                         goto out_sleep;
1086
1087                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1088                                   wl->channel, wl->dtim_period);
1089
1090                 if (ret < 0)
1091                         goto out_sleep;
1092         }
1093
1094 out_sleep:
1095         wl1251_ps_elp_sleep(wl);
1096
1097 out:
1098         mutex_unlock(&wl->mutex);
1099 }
1100
1101
1102 /* can't be const, mac80211 writes to this */
1103 static struct ieee80211_rate wl1251_rates[] = {
1104         { .bitrate = 10,
1105           .hw_value = 0x1,
1106           .hw_value_short = 0x1, },
1107         { .bitrate = 20,
1108           .hw_value = 0x2,
1109           .hw_value_short = 0x2,
1110           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1111         { .bitrate = 55,
1112           .hw_value = 0x4,
1113           .hw_value_short = 0x4,
1114           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1115         { .bitrate = 110,
1116           .hw_value = 0x20,
1117           .hw_value_short = 0x20,
1118           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1119         { .bitrate = 60,
1120           .hw_value = 0x8,
1121           .hw_value_short = 0x8, },
1122         { .bitrate = 90,
1123           .hw_value = 0x10,
1124           .hw_value_short = 0x10, },
1125         { .bitrate = 120,
1126           .hw_value = 0x40,
1127           .hw_value_short = 0x40, },
1128         { .bitrate = 180,
1129           .hw_value = 0x80,
1130           .hw_value_short = 0x80, },
1131         { .bitrate = 240,
1132           .hw_value = 0x200,
1133           .hw_value_short = 0x200, },
1134         { .bitrate = 360,
1135          .hw_value = 0x400,
1136          .hw_value_short = 0x400, },
1137         { .bitrate = 480,
1138           .hw_value = 0x800,
1139           .hw_value_short = 0x800, },
1140         { .bitrate = 540,
1141           .hw_value = 0x1000,
1142           .hw_value_short = 0x1000, },
1143 };
1144
1145 /* can't be const, mac80211 writes to this */
1146 static struct ieee80211_channel wl1251_channels[] = {
1147         { .hw_value = 1, .center_freq = 2412},
1148         { .hw_value = 2, .center_freq = 2417},
1149         { .hw_value = 3, .center_freq = 2422},
1150         { .hw_value = 4, .center_freq = 2427},
1151         { .hw_value = 5, .center_freq = 2432},
1152         { .hw_value = 6, .center_freq = 2437},
1153         { .hw_value = 7, .center_freq = 2442},
1154         { .hw_value = 8, .center_freq = 2447},
1155         { .hw_value = 9, .center_freq = 2452},
1156         { .hw_value = 10, .center_freq = 2457},
1157         { .hw_value = 11, .center_freq = 2462},
1158         { .hw_value = 12, .center_freq = 2467},
1159         { .hw_value = 13, .center_freq = 2472},
1160 };
1161
1162 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1163                              struct ieee80211_vif *vif, u16 queue,
1164                              const struct ieee80211_tx_queue_params *params)
1165 {
1166         enum wl1251_acx_ps_scheme ps_scheme;
1167         struct wl1251 *wl = hw->priv;
1168         int ret;
1169
1170         mutex_lock(&wl->mutex);
1171
1172         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1173
1174         ret = wl1251_ps_elp_wakeup(wl);
1175         if (ret < 0)
1176                 goto out;
1177
1178         /* mac80211 uses units of 32 usec */
1179         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1180                                 params->cw_min, params->cw_max,
1181                                 params->aifs, params->txop * 32);
1182         if (ret < 0)
1183                 goto out_sleep;
1184
1185         if (params->uapsd)
1186                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1187         else
1188                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1189
1190         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1191                                  CHANNEL_TYPE_EDCF,
1192                                  wl1251_tx_get_queue(queue), ps_scheme,
1193                                  WL1251_ACX_ACK_POLICY_LEGACY);
1194         if (ret < 0)
1195                 goto out_sleep;
1196
1197 out_sleep:
1198         wl1251_ps_elp_sleep(wl);
1199
1200 out:
1201         mutex_unlock(&wl->mutex);
1202
1203         return ret;
1204 }
1205
1206 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1207                                 struct survey_info *survey)
1208 {
1209         struct wl1251 *wl = hw->priv;
1210         struct ieee80211_conf *conf = &hw->conf;
1211
1212         if (idx != 0)
1213                 return -ENOENT;
1214
1215         survey->channel = conf->channel;
1216         survey->filled = SURVEY_INFO_NOISE_DBM;
1217         survey->noise = wl->noise;
1218
1219         return 0;
1220 }
1221
1222 /* can't be const, mac80211 writes to this */
1223 static struct ieee80211_supported_band wl1251_band_2ghz = {
1224         .channels = wl1251_channels,
1225         .n_channels = ARRAY_SIZE(wl1251_channels),
1226         .bitrates = wl1251_rates,
1227         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1228 };
1229
1230 static const struct ieee80211_ops wl1251_ops = {
1231         .start = wl1251_op_start,
1232         .stop = wl1251_op_stop,
1233         .add_interface = wl1251_op_add_interface,
1234         .remove_interface = wl1251_op_remove_interface,
1235         .config = wl1251_op_config,
1236         .configure_filter = wl1251_op_configure_filter,
1237         .tx = wl1251_op_tx,
1238         .set_key = wl1251_op_set_key,
1239         .hw_scan = wl1251_op_hw_scan,
1240         .bss_info_changed = wl1251_op_bss_info_changed,
1241         .set_rts_threshold = wl1251_op_set_rts_threshold,
1242         .conf_tx = wl1251_op_conf_tx,
1243         .get_survey = wl1251_op_get_survey,
1244 };
1245
1246 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1247 {
1248         unsigned long timeout;
1249
1250         wl1251_reg_write32(wl, EE_ADDR, offset);
1251         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1252
1253         /* EE_CTL_READ clears when data is ready */
1254         timeout = jiffies + msecs_to_jiffies(100);
1255         while (1) {
1256                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1257                         break;
1258
1259                 if (time_after(jiffies, timeout))
1260                         return -ETIMEDOUT;
1261
1262                 msleep(1);
1263         }
1264
1265         *data = wl1251_reg_read32(wl, EE_DATA);
1266         return 0;
1267 }
1268
1269 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1270                               u8 *data, size_t len)
1271 {
1272         size_t i;
1273         int ret;
1274
1275         wl1251_reg_write32(wl, EE_START, 0);
1276
1277         for (i = 0; i < len; i++) {
1278                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1279                 if (ret < 0)
1280                         return ret;
1281         }
1282
1283         return 0;
1284 }
1285
1286 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1287 {
1288         u8 mac[ETH_ALEN];
1289         int i, ret;
1290
1291         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1292
1293         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1294         if (ret < 0) {
1295                 wl1251_warning("failed to read MAC address from EEPROM");
1296                 return ret;
1297         }
1298
1299         /* MAC is stored in reverse order */
1300         for (i = 0; i < ETH_ALEN; i++)
1301                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1302
1303         return 0;
1304 }
1305
1306 static int wl1251_register_hw(struct wl1251 *wl)
1307 {
1308         int ret;
1309
1310         if (wl->mac80211_registered)
1311                 return 0;
1312
1313         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1314
1315         ret = ieee80211_register_hw(wl->hw);
1316         if (ret < 0) {
1317                 wl1251_error("unable to register mac80211 hw: %d", ret);
1318                 return ret;
1319         }
1320
1321         wl->mac80211_registered = true;
1322
1323         wl1251_notice("loaded");
1324
1325         return 0;
1326 }
1327
1328 int wl1251_init_ieee80211(struct wl1251 *wl)
1329 {
1330         int ret;
1331
1332         /* The tx descriptor buffer and the TKIP space */
1333         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1334                 + WL1251_TKIP_IV_SPACE;
1335
1336         /* unit us */
1337         /* FIXME: find a proper value */
1338         wl->hw->channel_change_time = 10000;
1339
1340         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1341                 IEEE80211_HW_SUPPORTS_PS |
1342                 IEEE80211_HW_BEACON_FILTER |
1343                 IEEE80211_HW_SUPPORTS_UAPSD |
1344                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1345
1346         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1347                                          BIT(NL80211_IFTYPE_ADHOC);
1348         wl->hw->wiphy->max_scan_ssids = 1;
1349         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1350
1351         wl->hw->queues = 4;
1352
1353         if (wl->use_eeprom)
1354                 wl1251_read_eeprom_mac(wl);
1355
1356         ret = wl1251_register_hw(wl);
1357         if (ret)
1358                 goto out;
1359
1360         wl1251_debugfs_init(wl);
1361         wl1251_notice("initialized");
1362
1363         ret = 0;
1364
1365 out:
1366         return ret;
1367 }
1368 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1369
1370 struct ieee80211_hw *wl1251_alloc_hw(void)
1371 {
1372         struct ieee80211_hw *hw;
1373         struct wl1251 *wl;
1374         int i;
1375         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1376
1377         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1378         if (!hw) {
1379                 wl1251_error("could not alloc ieee80211_hw");
1380                 return ERR_PTR(-ENOMEM);
1381         }
1382
1383         wl = hw->priv;
1384         memset(wl, 0, sizeof(*wl));
1385
1386         wl->hw = hw;
1387
1388         wl->data_in_count = 0;
1389
1390         skb_queue_head_init(&wl->tx_queue);
1391
1392         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1393         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1394         wl->channel = WL1251_DEFAULT_CHANNEL;
1395         wl->scanning = false;
1396         wl->default_key = 0;
1397         wl->listen_int = 1;
1398         wl->rx_counter = 0;
1399         wl->rx_handled = 0;
1400         wl->rx_current_buffer = 0;
1401         wl->rx_last_id = 0;
1402         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1403         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1404         wl->elp = false;
1405         wl->station_mode = STATION_ACTIVE_MODE;
1406         wl->psm_requested = false;
1407         wl->tx_queue_stopped = false;
1408         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1409         wl->rssi_thold = 0;
1410         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1411         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1412         wl->vif = NULL;
1413
1414         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1415                 wl->tx_frames[i] = NULL;
1416
1417         wl->next_tx_complete = 0;
1418
1419         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1420         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1421
1422         /*
1423          * In case our MAC address is not correctly set,
1424          * we use a random but Nokia MAC.
1425          */
1426         memcpy(wl->mac_addr, nokia_oui, 3);
1427         get_random_bytes(wl->mac_addr + 3, 3);
1428
1429         wl->state = WL1251_STATE_OFF;
1430         mutex_init(&wl->mutex);
1431
1432         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1433         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1434
1435         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1436         if (!wl->rx_descriptor) {
1437                 wl1251_error("could not allocate memory for rx descriptor");
1438                 ieee80211_free_hw(hw);
1439                 return ERR_PTR(-ENOMEM);
1440         }
1441
1442         return hw;
1443 }
1444 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1445
1446 int wl1251_free_hw(struct wl1251 *wl)
1447 {
1448         ieee80211_unregister_hw(wl->hw);
1449
1450         wl1251_debugfs_exit(wl);
1451
1452         kfree(wl->target_mem_map);
1453         kfree(wl->data_path);
1454         vfree(wl->fw);
1455         wl->fw = NULL;
1456         kfree(wl->nvs);
1457         wl->nvs = NULL;
1458
1459         kfree(wl->rx_descriptor);
1460         wl->rx_descriptor = NULL;
1461
1462         ieee80211_free_hw(wl->hw);
1463
1464         return 0;
1465 }
1466 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1467
1468 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1469 MODULE_LICENSE("GPL");
1470 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1471 MODULE_FIRMWARE(WL1251_FW_NAME);