drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
  30 #include <linux/device.h>
  31 #endif
  32 #include <linux/crc32.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include "wl1251.h"
  37 #include "wl12xx_80211.h"
  38 #include "wl1251_reg.h"
  39 #include "wl1251_io.h"
  40 #include "wl1251_cmd.h"
  41 #include "wl1251_event.h"
  42 #include "wl1251_tx.h"
  43 #include "wl1251_rx.h"
  44 #include "wl1251_ps.h"
  45 #include "wl1251_init.h"
  46 #include "wl1251_debugfs.h"
  47 #include "wl1251_boot.h"
  48
  49 void wl1251_enable_interrupts(struct wl1251 *wl)
  50 {
  51         wl->if_ops->enable_irq(wl);
  52 }
  53
  54 void wl1251_disable_interrupts(struct wl1251 *wl)
  55 {
  56         wl->if_ops->disable_irq(wl);
  57 }
  58
  59 static void wl1251_power_off(struct wl1251 *wl)
  60 {
  61         wl->set_power(false);
  62 }
  63
  64 static void wl1251_power_on(struct wl1251 *wl)
  65 {
  66         wl->set_power(true);
  67 }
  68
  69 static int wl1251_fetch_firmware(struct wl1251 *wl)
  70 {
  71         const struct firmware *fw;
  72         struct device *dev = wiphy_dev(wl->hw->wiphy);
  73         int ret;
  74
  75         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  76
  77         if (ret < 0) {
  78                 wl1251_error("could not get firmware: %d", ret);
  79                 return ret;
  80         }
  81
  82         if (fw->size % 4) {
  83                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  84                              fw->size);
  85                 ret = -EILSEQ;
  86                 goto out;
  87         }
  88
  89         wl->fw_len = fw->size;
  90         wl->fw = vmalloc(wl->fw_len);
  91
  92         if (!wl->fw) {
  93                 wl1251_error("could not allocate memory for the firmware");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97
  98         memcpy(wl->fw, fw->data, wl->fw_len);
  99
 100         ret = 0;
 101
 102 out:
 103         release_firmware(fw);
 104
 105         return ret;
 106 }
 107
 108 static int wl1251_fetch_nvs(struct wl1251 *wl)
 109 {
 110         const struct firmware *fw;
 111         struct device *dev = wiphy_dev(wl->hw->wiphy);
 112         int ret;
 113
 114         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 115
 116         if (ret < 0) {
 117                 wl1251_error("could not get nvs file: %d", ret);
 118                 return ret;
 119         }
 120
 121         if (fw->size % 4) {
 122                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 123                              fw->size);
 124                 ret = -EILSEQ;
 125                 goto out;
 126         }
 127
 128         wl->nvs_len = fw->size;
 129         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 130
 131         if (!wl->nvs) {
 132                 wl1251_error("could not allocate memory for the nvs file");
 133                 ret = -ENOMEM;
 134                 goto out;
 135         }
 136
 137         ret = 0;
 138
 139 out:
 140         release_firmware(fw);
 141
 142         return ret;
 143 }
 144
 145 static void wl1251_fw_wakeup(struct wl1251 *wl)
 146 {
 147         u32 elp_reg;
 148
 149         elp_reg = ELPCTRL_WAKE_UP;
 150         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 151         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 152
 153         if (!(elp_reg & ELPCTRL_WLAN_READY))
 154                 wl1251_warning("WLAN not ready");
 155 }
 156
 157 static int wl1251_chip_wakeup(struct wl1251 *wl)
 158 {
 159         int ret = 0;
 160
 161         wl1251_power_on(wl);
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338
 339         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 340                               dtim_period);
 341         if (ret < 0)
 342                 goto out;
 343
 344         /*
 345          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 346          * locking we just sleep instead, for now
 347          */
 348         msleep(10);
 349
 350 out:
 351         return ret;
 352 }
 353
 354 static void wl1251_filter_work(struct work_struct *work)
 355 {
 356         struct wl1251 *wl =
 357                 container_of(work, struct wl1251, filter_work);
 358         int ret;
 359
 360         mutex_lock(&wl->mutex);
 361
 362         if (wl->state == WL1251_STATE_OFF)
 363                 goto out;
 364
 365         ret = wl1251_ps_elp_wakeup(wl);
 366         if (ret < 0)
 367                 goto out;
 368
 369         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 370                           wl->dtim_period);
 371         if (ret < 0)
 372                 goto out_sleep;
 373
 374 out_sleep:
 375         wl1251_ps_elp_sleep(wl);
 376
 377 out:
 378         mutex_unlock(&wl->mutex);
 379 }
 380
 381 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 382 {
 383         struct wl1251 *wl = hw->priv;
 384
 385         skb_queue_tail(&wl->tx_queue, skb);
 386
 387         /*
 388          * The chip specific setup must run before the first TX packet -
 389          * before that, the tx_work will not be initialized!
 390          */
 391
 392         ieee80211_queue_work(wl->hw, &wl->tx_work);
 393
 394         /*
 395          * The workqueue is slow to process the tx_queue and we need stop
 396          * the queue here, otherwise the queue will get too long.
 397          */
 398         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 399                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 400                 ieee80211_stop_queues(wl->hw);
 401
 402                 /*
 403                  * FIXME: this is racy, the variable is not properly
 404                  * protected. Maybe fix this by removing the stupid
 405                  * variable altogether and checking the real queue state?
 406                  */
 407                 wl->tx_queue_stopped = true;
 408         }
 409
 410         return NETDEV_TX_OK;
 411 }
 412
 413 static int wl1251_op_start(struct ieee80211_hw *hw)
 414 {
 415         struct wl1251 *wl = hw->priv;
 416         struct wiphy *wiphy = hw->wiphy;
 417         int ret = 0;
 418
 419         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 420
 421         mutex_lock(&wl->mutex);
 422
 423         if (wl->state != WL1251_STATE_OFF) {
 424                 wl1251_error("cannot start because not in off state: %d",
 425                              wl->state);
 426                 ret = -EBUSY;
 427                 goto out;
 428         }
 429
 430         ret = wl1251_chip_wakeup(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         ret = wl1251_boot(wl);
 435         if (ret < 0)
 436                 goto out;
 437
 438         ret = wl1251_hw_init(wl);
 439         if (ret < 0)
 440                 goto out;
 441
 442         ret = wl1251_acx_station_id(wl);
 443         if (ret < 0)
 444                 goto out;
 445
 446         wl->state = WL1251_STATE_ON;
 447
 448         wl1251_info("firmware booted (%s)", wl->fw_ver);
 449
 450         /* update hw/fw version info in wiphy struct */
 451         wiphy->hw_version = wl->chip_id;
 452         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 453
 454 out:
 455         if (ret < 0)
 456                 wl1251_power_off(wl);
 457
 458         mutex_unlock(&wl->mutex);
 459
 460         return ret;
 461 }
 462
 463 static void wl1251_op_stop(struct ieee80211_hw *hw)
 464 {
 465         struct wl1251 *wl = hw->priv;
 466
 467         wl1251_info("down");
 468
 469         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 470
 471         mutex_lock(&wl->mutex);
 472
 473         WARN_ON(wl->state != WL1251_STATE_ON);
 474
 475         if (wl->scanning) {
 476                 mutex_unlock(&wl->mutex);
 477                 ieee80211_scan_completed(wl->hw, true);
 478                 mutex_lock(&wl->mutex);
 479                 wl->scanning = false;
 480         }
 481
 482         wl->state = WL1251_STATE_OFF;
 483
 484         wl1251_disable_interrupts(wl);
 485
 486         mutex_unlock(&wl->mutex);
 487
 488         cancel_work_sync(&wl->irq_work);
 489         cancel_work_sync(&wl->tx_work);
 490         cancel_work_sync(&wl->filter_work);
 491
 492         mutex_lock(&wl->mutex);
 493
 494         /* let's notify MAC80211 about the remaining pending TX frames */
 495         wl1251_tx_flush(wl);
 496         wl1251_power_off(wl);
 497
 498         memset(wl->bssid, 0, ETH_ALEN);
 499         wl->listen_int = 1;
 500         wl->bss_type = MAX_BSS_TYPE;
 501
 502         wl->data_in_count = 0;
 503         wl->rx_counter = 0;
 504         wl->rx_handled = 0;
 505         wl->rx_current_buffer = 0;
 506         wl->rx_last_id = 0;
 507         wl->next_tx_complete = 0;
 508         wl->elp = false;
 509         wl->psm = 0;
 510         wl->tx_queue_stopped = false;
 511         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 512         wl->channel = WL1251_DEFAULT_CHANNEL;
 513
 514         wl1251_debugfs_reset(wl);
 515
 516         mutex_unlock(&wl->mutex);
 517 }
 518
 519 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 520                                    struct ieee80211_vif *vif)
 521 {
 522         struct wl1251 *wl = hw->priv;
 523         int ret = 0;
 524
 525         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 526                      vif->type, vif->addr);
 527
 528         mutex_lock(&wl->mutex);
 529         if (wl->vif) {
 530                 ret = -EBUSY;
 531                 goto out;
 532         }
 533
 534         wl->vif = vif;
 535
 536         switch (vif->type) {
 537         case NL80211_IFTYPE_STATION:
 538                 wl->bss_type = BSS_TYPE_STA_BSS;
 539                 break;
 540         case NL80211_IFTYPE_ADHOC:
 541                 wl->bss_type = BSS_TYPE_IBSS;
 542                 break;
 543         default:
 544                 ret = -EOPNOTSUPP;
 545                 goto out;
 546         }
 547
 548         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 549                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 550                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 551                 ret = wl1251_acx_station_id(wl);
 552                 if (ret < 0)
 553                         goto out;
 554         }
 555
 556 out:
 557         mutex_unlock(&wl->mutex);
 558         return ret;
 559 }
 560
 561 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 562                                          struct ieee80211_vif *vif)
 563 {
 564         struct wl1251 *wl = hw->priv;
 565
 566         mutex_lock(&wl->mutex);
 567         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 568         wl->vif = NULL;
 569         mutex_unlock(&wl->mutex);
 570 }
 571
 572 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 573 {
 574         struct ieee80211_qos_hdr template;
 575
 576         memset(&template, 0, sizeof(template));
 577
 578         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 579         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 580         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 581
 582         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 583                                              IEEE80211_STYPE_QOS_NULLFUNC |
 584                                              IEEE80211_FCTL_TODS);
 585
 586         /* FIXME: not sure what priority to use here */
 587         template.qos_ctrl = cpu_to_le16(0);
 588
 589         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 590                                        sizeof(template));
 591 }
 592
 593 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 594 {
 595         struct wl1251 *wl = hw->priv;
 596         struct ieee80211_conf *conf = &hw->conf;
 597         int channel, ret = 0;
 598
 599         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 600
 601         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 602                      channel,
 603                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 604                      conf->power_level);
 605
 606         mutex_lock(&wl->mutex);
 607
 608         ret = wl1251_ps_elp_wakeup(wl);
 609         if (ret < 0)
 610                 goto out;
 611
 612         if (channel != wl->channel) {
 613                 wl->channel = channel;
 614
 615                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 616                                   wl->beacon_int, wl->dtim_period);
 617                 if (ret < 0)
 618                         goto out_sleep;
 619         }
 620
 621         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 622                 wl1251_debug(DEBUG_PSM, "psm enabled");
 623
 624                 wl->psm_requested = true;
 625
 626                 wl->dtim_period = conf->ps_dtim_period;
 627
 628                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 629                                                   wl->dtim_period);
 630
 631                 /*
 632                  * mac80211 enables PSM only if we're already associated.
 633                  */
 634                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 635                 if (ret < 0)
 636                         goto out_sleep;
 637         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 638                    wl->psm_requested) {
 639                 wl1251_debug(DEBUG_PSM, "psm disabled");
 640
 641                 wl->psm_requested = false;
 642
 643                 if (wl->psm) {
 644                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 645                         if (ret < 0)
 646                                 goto out_sleep;
 647                 }
 648         }
 649
 650         if (conf->power_level != wl->power_level) {
 651                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 652                 if (ret < 0)
 653                         goto out_sleep;
 654
 655                 wl->power_level = conf->power_level;
 656         }
 657
 658 out_sleep:
 659         wl1251_ps_elp_sleep(wl);
 660
 661 out:
 662         mutex_unlock(&wl->mutex);
 663
 664         return ret;
 665 }
 666
 667 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 668                                   FIF_ALLMULTI | \
 669                                   FIF_FCSFAIL | \
 670                                   FIF_BCN_PRBRESP_PROMISC | \
 671                                   FIF_CONTROL | \
 672                                   FIF_OTHER_BSS)
 673
 674 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 675                                        unsigned int changed,
 676                                        unsigned int *total,u64 multicast)
 677 {
 678         struct wl1251 *wl = hw->priv;
 679
 680         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 681
 682         *total &= WL1251_SUPPORTED_FILTERS;
 683         changed &= WL1251_SUPPORTED_FILTERS;
 684
 685         if (changed == 0)
 686                 /* no filters which we support changed */
 687                 return;
 688
 689         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 690
 691         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 692         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 693
 694         if (*total & FIF_PROMISC_IN_BSS) {
 695                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 696                 wl->rx_config |= CFG_RX_ALL_GOOD;
 697         }
 698         if (*total & FIF_ALLMULTI)
 699                 /*
 700                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 701                  * all multicast frames
 702                  */
 703                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 704         if (*total & FIF_FCSFAIL)
 705                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 706         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 707                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 708                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 709         }
 710         if (*total & FIF_CONTROL)
 711                 wl->rx_filter |= CFG_RX_CTL_EN;
 712         if (*total & FIF_OTHER_BSS)
 713                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 714
 715         /*
 716          * FIXME: workqueues need to be properly cancelled on stop(), for
 717          * now let's just disable changing the filter settings. They will
 718          * be updated any on config().
 719          */
 720         /* schedule_work(&wl->filter_work); */
 721 }
 722
 723 /* HW encryption */
 724 static int wl1251_set_key_type(struct wl1251 *wl,
 725                                struct wl1251_cmd_set_keys *key,
 726                                enum set_key_cmd cmd,
 727                                struct ieee80211_key_conf *mac80211_key,
 728                                const u8 *addr)
 729 {
 730         switch (mac80211_key->alg) {
 731         case ALG_WEP:
 732                 if (is_broadcast_ether_addr(addr))
 733                         key->key_type = KEY_WEP_DEFAULT;
 734                 else
 735                         key->key_type = KEY_WEP_ADDR;
 736
 737                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 738                 break;
 739         case ALG_TKIP:
 740                 if (is_broadcast_ether_addr(addr))
 741                         key->key_type = KEY_TKIP_MIC_GROUP;
 742                 else
 743                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 744
 745                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 746                 break;
 747         case ALG_CCMP:
 748                 if (is_broadcast_ether_addr(addr))
 749                         key->key_type = KEY_AES_GROUP;
 750                 else
 751                         key->key_type = KEY_AES_PAIRWISE;
 752                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 753                 break;
 754         default:
 755                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 756                 return -EOPNOTSUPP;
 757         }
 758
 759         return 0;
 760 }
 761
 762 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 763                              struct ieee80211_vif *vif,
 764                              struct ieee80211_sta *sta,
 765                              struct ieee80211_key_conf *key)
 766 {
 767         struct wl1251 *wl = hw->priv;
 768         struct wl1251_cmd_set_keys *wl_cmd;
 769         const u8 *addr;
 770         int ret;
 771
 772         static const u8 bcast_addr[ETH_ALEN] =
 773                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 774
 775         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 776
 777         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 778         if (!wl_cmd) {
 779                 ret = -ENOMEM;
 780                 goto out;
 781         }
 782
 783         addr = sta ? sta->addr : bcast_addr;
 784
 785         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 786         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 787         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 788                      key->alg, key->keyidx, key->keylen, key->flags);
 789         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 790
 791         if (is_zero_ether_addr(addr)) {
 792                 /* We dont support TX only encryption */
 793                 ret = -EOPNOTSUPP;
 794                 goto out;
 795         }
 796
 797         mutex_lock(&wl->mutex);
 798
 799         ret = wl1251_ps_elp_wakeup(wl);
 800         if (ret < 0)
 801                 goto out_unlock;
 802
 803         switch (cmd) {
 804         case SET_KEY:
 805                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 806                 break;
 807         case DISABLE_KEY:
 808                 wl_cmd->key_action = KEY_REMOVE;
 809                 break;
 810         default:
 811                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 812                 break;
 813         }
 814
 815         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 816         if (ret < 0) {
 817                 wl1251_error("Set KEY type failed");
 818                 goto out_sleep;
 819         }
 820
 821         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 822                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 823
 824         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 825             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 826                 /*
 827                  * We get the key in the following form:
 828                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 829                  * but the target is expecting:
 830                  * TKIP - RX MIC - TX MIC
 831                  */
 832                 memcpy(wl_cmd->key, key->key, 16);
 833                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 834                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 835
 836         } else {
 837                 memcpy(wl_cmd->key, key->key, key->keylen);
 838         }
 839         wl_cmd->key_size = key->keylen;
 840
 841         wl_cmd->id = key->keyidx;
 842         wl_cmd->ssid_profile = 0;
 843
 844         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 845
 846         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 847         if (ret < 0) {
 848                 wl1251_warning("could not set keys");
 849                 goto out_sleep;
 850         }
 851
 852 out_sleep:
 853         wl1251_ps_elp_sleep(wl);
 854
 855 out_unlock:
 856         mutex_unlock(&wl->mutex);
 857
 858 out:
 859         kfree(wl_cmd);
 860
 861         return ret;
 862 }
 863
 864 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 865                              struct cfg80211_scan_request *req)
 866 {
 867         struct wl1251 *wl = hw->priv;
 868         struct sk_buff *skb;
 869         size_t ssid_len = 0;
 870         u8 *ssid = NULL;
 871         int ret;
 872
 873         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 874
 875         if (req->n_ssids) {
 876                 ssid = req->ssids[0].ssid;
 877                 ssid_len = req->ssids[0].ssid_len;
 878         }
 879
 880         mutex_lock(&wl->mutex);
 881
 882         if (wl->scanning) {
 883                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 884                 ret = -EINVAL;
 885                 goto out;
 886         }
 887
 888         ret = wl1251_ps_elp_wakeup(wl);
 889         if (ret < 0)
 890                 goto out;
 891
 892         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 893                                      req->ie, req->ie_len);
 894         if (!skb) {
 895                 ret = -ENOMEM;
 896                 goto out;
 897         }
 898
 899         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 900                                       skb->len);
 901         dev_kfree_skb(skb);
 902         if (ret < 0)
 903                 goto out_sleep;
 904
 905         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 906         if (ret < 0)
 907                 goto out_sleep;
 908
 909         wl->scanning = true;
 910
 911         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 912                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 913         if (ret < 0) {
 914                 wl->scanning = false;
 915                 goto out_sleep;
 916         }
 917
 918 out_sleep:
 919         wl1251_ps_elp_sleep(wl);
 920
 921 out:
 922         mutex_unlock(&wl->mutex);
 923
 924         return ret;
 925 }
 926
 927 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 928 {
 929         struct wl1251 *wl = hw->priv;
 930         int ret;
 931
 932         mutex_lock(&wl->mutex);
 933
 934         ret = wl1251_ps_elp_wakeup(wl);
 935         if (ret < 0)
 936                 goto out;
 937
 938         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 939         if (ret < 0)
 940                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 941
 942         wl1251_ps_elp_sleep(wl);
 943
 944 out:
 945         mutex_unlock(&wl->mutex);
 946
 947         return ret;
 948 }
 949
 950 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 951                                        struct ieee80211_vif *vif,
 952                                        struct ieee80211_bss_conf *bss_conf,
 953                                        u32 changed)
 954 {
 955         struct wl1251 *wl = hw->priv;
 956         struct sk_buff *beacon, *skb;
 957         int ret;
 958
 959         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 960
 961         mutex_lock(&wl->mutex);
 962
 963         ret = wl1251_ps_elp_wakeup(wl);
 964         if (ret < 0)
 965                 goto out;
 966
 967         if (changed & BSS_CHANGED_BSSID) {
 968                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 969
 970                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 971                 if (!skb)
 972                         goto out_sleep;
 973
 974                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 975                                               skb->data, skb->len);
 976                 dev_kfree_skb(skb);
 977                 if (ret < 0)
 978                         goto out_sleep;
 979
 980                 ret = wl1251_build_qos_null_data(wl);
 981                 if (ret < 0)
 982                         goto out;
 983
 984                 if (wl->bss_type != BSS_TYPE_IBSS) {
 985                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 986                                           wl->beacon_int, wl->dtim_period);
 987                         if (ret < 0)
 988                                 goto out_sleep;
 989                 }
 990         }
 991
 992         if (changed & BSS_CHANGED_ASSOC) {
 993                 if (bss_conf->assoc) {
 994                         wl->beacon_int = bss_conf->beacon_int;
 995
 996                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 997                         if (!skb)
 998                                 goto out_sleep;
 999
1000                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1001                                                       skb->data,
1002                                                       skb->len);
1003                         dev_kfree_skb(skb);
1004                         if (ret < 0)
1005                                 goto out_sleep;
1006
1007                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1008                         if (ret < 0)
1009                                 goto out_sleep;
1010                 } else {
1011                         /* use defaults when not associated */
1012                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1013                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1014                 }
1015         }
1016         if (changed & BSS_CHANGED_ERP_SLOT) {
1017                 if (bss_conf->use_short_slot)
1018                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1019                 else
1020                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1021                 if (ret < 0) {
1022                         wl1251_warning("Set slot time failed %d", ret);
1023                         goto out_sleep;
1024                 }
1025         }
1026
1027         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1028                 if (bss_conf->use_short_preamble)
1029                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1030                 else
1031                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1032         }
1033
1034         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1035                 if (bss_conf->use_cts_prot)
1036                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1037                 else
1038                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1039                 if (ret < 0) {
1040                         wl1251_warning("Set ctsprotect failed %d", ret);
1041                         goto out_sleep;
1042                 }
1043         }
1044
1045         if (changed & BSS_CHANGED_BEACON) {
1046                 beacon = ieee80211_beacon_get(hw, vif);
1047                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1048                                               beacon->len);
1049
1050                 if (ret < 0) {
1051                         dev_kfree_skb(beacon);
1052                         goto out_sleep;
1053                 }
1054
1055                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1056                                               beacon->len);
1057
1058                 dev_kfree_skb(beacon);
1059
1060                 if (ret < 0)
1061                         goto out_sleep;
1062
1063                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1064                                   wl->channel, wl->dtim_period);
1065
1066                 if (ret < 0)
1067                         goto out_sleep;
1068         }
1069
1070 out_sleep:
1071         wl1251_ps_elp_sleep(wl);
1072
1073 out:
1074         mutex_unlock(&wl->mutex);
1075 }
1076
1077
1078 /* can't be const, mac80211 writes to this */
1079 static struct ieee80211_rate wl1251_rates[] = {
1080         { .bitrate = 10,
1081           .hw_value = 0x1,
1082           .hw_value_short = 0x1, },
1083         { .bitrate = 20,
1084           .hw_value = 0x2,
1085           .hw_value_short = 0x2,
1086           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1087         { .bitrate = 55,
1088           .hw_value = 0x4,
1089           .hw_value_short = 0x4,
1090           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1091         { .bitrate = 110,
1092           .hw_value = 0x20,
1093           .hw_value_short = 0x20,
1094           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1095         { .bitrate = 60,
1096           .hw_value = 0x8,
1097           .hw_value_short = 0x8, },
1098         { .bitrate = 90,
1099           .hw_value = 0x10,
1100           .hw_value_short = 0x10, },
1101         { .bitrate = 120,
1102           .hw_value = 0x40,
1103           .hw_value_short = 0x40, },
1104         { .bitrate = 180,
1105           .hw_value = 0x80,
1106           .hw_value_short = 0x80, },
1107         { .bitrate = 240,
1108           .hw_value = 0x200,
1109           .hw_value_short = 0x200, },
1110         { .bitrate = 360,
1111          .hw_value = 0x400,
1112          .hw_value_short = 0x400, },
1113         { .bitrate = 480,
1114           .hw_value = 0x800,
1115           .hw_value_short = 0x800, },
1116         { .bitrate = 540,
1117           .hw_value = 0x1000,
1118           .hw_value_short = 0x1000, },
1119 };
1120
1121 /* can't be const, mac80211 writes to this */
1122 static struct ieee80211_channel wl1251_channels[] = {
1123         { .hw_value = 1, .center_freq = 2412},
1124         { .hw_value = 2, .center_freq = 2417},
1125         { .hw_value = 3, .center_freq = 2422},
1126         { .hw_value = 4, .center_freq = 2427},
1127         { .hw_value = 5, .center_freq = 2432},
1128         { .hw_value = 6, .center_freq = 2437},
1129         { .hw_value = 7, .center_freq = 2442},
1130         { .hw_value = 8, .center_freq = 2447},
1131         { .hw_value = 9, .center_freq = 2452},
1132         { .hw_value = 10, .center_freq = 2457},
1133         { .hw_value = 11, .center_freq = 2462},
1134         { .hw_value = 12, .center_freq = 2467},
1135         { .hw_value = 13, .center_freq = 2472},
1136 };
1137
1138 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1139                              const struct ieee80211_tx_queue_params *params)
1140 {
1141         enum wl1251_acx_ps_scheme ps_scheme;
1142         struct wl1251 *wl = hw->priv;
1143         int ret;
1144
1145         mutex_lock(&wl->mutex);
1146
1147         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1148
1149         ret = wl1251_ps_elp_wakeup(wl);
1150         if (ret < 0)
1151                 goto out;
1152
1153         /* mac80211 uses units of 32 usec */
1154         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1155                                 params->cw_min, params->cw_max,
1156                                 params->aifs, params->txop * 32);
1157         if (ret < 0)
1158                 goto out_sleep;
1159
1160         if (params->uapsd)
1161                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1162         else
1163                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1164
1165         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1166                                  CHANNEL_TYPE_EDCF,
1167                                  wl1251_tx_get_queue(queue), ps_scheme,
1168                                  WL1251_ACX_ACK_POLICY_LEGACY);
1169         if (ret < 0)
1170                 goto out_sleep;
1171
1172 out_sleep:
1173         wl1251_ps_elp_sleep(wl);
1174
1175 out:
1176         mutex_unlock(&wl->mutex);
1177
1178         return ret;
1179 }
1180
1181 /* can't be const, mac80211 writes to this */
1182 static struct ieee80211_supported_band wl1251_band_2ghz = {
1183         .channels = wl1251_channels,
1184         .n_channels = ARRAY_SIZE(wl1251_channels),
1185         .bitrates = wl1251_rates,
1186         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1187 };
1188
1189 static const struct ieee80211_ops wl1251_ops = {
1190         .start = wl1251_op_start,
1191         .stop = wl1251_op_stop,
1192         .add_interface = wl1251_op_add_interface,
1193         .remove_interface = wl1251_op_remove_interface,
1194         .config = wl1251_op_config,
1195         .configure_filter = wl1251_op_configure_filter,
1196         .tx = wl1251_op_tx,
1197         .set_key = wl1251_op_set_key,
1198         .hw_scan = wl1251_op_hw_scan,
1199         .bss_info_changed = wl1251_op_bss_info_changed,
1200         .set_rts_threshold = wl1251_op_set_rts_threshold,
1201         .conf_tx = wl1251_op_conf_tx,
1202 };
1203
1204 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1205 {
1206         unsigned long timeout;
1207
1208         wl1251_reg_write32(wl, EE_ADDR, offset);
1209         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1210
1211         /* EE_CTL_READ clears when data is ready */
1212         timeout = jiffies + msecs_to_jiffies(100);
1213         while (1) {
1214                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1215                         break;
1216
1217                 if (time_after(jiffies, timeout))
1218                         return -ETIMEDOUT;
1219
1220                 msleep(1);
1221         }
1222
1223         *data = wl1251_reg_read32(wl, EE_DATA);
1224         return 0;
1225 }
1226
1227 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1228                               u8 *data, size_t len)
1229 {
1230         size_t i;
1231         int ret;
1232
1233         wl1251_reg_write32(wl, EE_START, 0);
1234
1235         for (i = 0; i < len; i++) {
1236                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1237                 if (ret < 0)
1238                         return ret;
1239         }
1240
1241         return 0;
1242 }
1243
1244 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1245 {
1246         u8 mac[ETH_ALEN];
1247         int i, ret;
1248
1249         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1250
1251         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1252         if (ret < 0) {
1253                 wl1251_warning("failed to read MAC address from EEPROM");
1254                 return ret;
1255         }
1256
1257         /* MAC is stored in reverse order */
1258         for (i = 0; i < ETH_ALEN; i++)
1259                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1260
1261         return 0;
1262 }
1263
1264 static int wl1251_register_hw(struct wl1251 *wl)
1265 {
1266         int ret;
1267
1268         if (wl->mac80211_registered)
1269                 return 0;
1270
1271         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1272
1273         ret = ieee80211_register_hw(wl->hw);
1274         if (ret < 0) {
1275                 wl1251_error("unable to register mac80211 hw: %d", ret);
1276                 return ret;
1277         }
1278
1279         wl->mac80211_registered = true;
1280
1281         wl1251_notice("loaded");
1282
1283         return 0;
1284 }
1285
1286 int wl1251_init_ieee80211(struct wl1251 *wl)
1287 {
1288         int ret;
1289
1290         /* The tx descriptor buffer and the TKIP space */
1291         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1292                 + WL1251_TKIP_IV_SPACE;
1293
1294         /* unit us */
1295         /* FIXME: find a proper value */
1296         wl->hw->channel_change_time = 10000;
1297
1298         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1299                 IEEE80211_HW_NOISE_DBM |
1300                 IEEE80211_HW_SUPPORTS_PS |
1301                 IEEE80211_HW_BEACON_FILTER |
1302                 IEEE80211_HW_SUPPORTS_UAPSD;
1303
1304         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1305         wl->hw->wiphy->max_scan_ssids = 1;
1306         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1307
1308         wl->hw->queues = 4;
1309
1310         if (wl->use_eeprom)
1311                 wl1251_read_eeprom_mac(wl);
1312
1313         ret = wl1251_register_hw(wl);
1314         if (ret)
1315                 goto out;
1316
1317         wl1251_debugfs_init(wl);
1318         wl1251_notice("initialized");
1319
1320         ret = 0;
1321
1322 out:
1323         return ret;
1324 }
1325 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1326
1327 struct ieee80211_hw *wl1251_alloc_hw(void)
1328 {
1329         struct ieee80211_hw *hw;
1330         struct wl1251 *wl;
1331         int i;
1332         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1333
1334         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1335         if (!hw) {
1336                 wl1251_error("could not alloc ieee80211_hw");
1337                 return ERR_PTR(-ENOMEM);
1338         }
1339
1340         wl = hw->priv;
1341         memset(wl, 0, sizeof(*wl));
1342
1343         wl->hw = hw;
1344
1345         wl->data_in_count = 0;
1346
1347         skb_queue_head_init(&wl->tx_queue);
1348
1349         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1350         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1351         wl->channel = WL1251_DEFAULT_CHANNEL;
1352         wl->scanning = false;
1353         wl->default_key = 0;
1354         wl->listen_int = 1;
1355         wl->rx_counter = 0;
1356         wl->rx_handled = 0;
1357         wl->rx_current_buffer = 0;
1358         wl->rx_last_id = 0;
1359         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1360         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1361         wl->elp = false;
1362         wl->psm = 0;
1363         wl->psm_requested = false;
1364         wl->tx_queue_stopped = false;
1365         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1366         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1367         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1368         wl->vif = NULL;
1369
1370         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1371                 wl->tx_frames[i] = NULL;
1372
1373         wl->next_tx_complete = 0;
1374
1375         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1376         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1377
1378         /*
1379          * In case our MAC address is not correctly set,
1380          * we use a random but Nokia MAC.
1381          */
1382         memcpy(wl->mac_addr, nokia_oui, 3);
1383         get_random_bytes(wl->mac_addr + 3, 3);
1384
1385         wl->state = WL1251_STATE_OFF;
1386         mutex_init(&wl->mutex);
1387
1388         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1389         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1390
1391         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1392         if (!wl->rx_descriptor) {
1393                 wl1251_error("could not allocate memory for rx descriptor");
1394                 ieee80211_free_hw(hw);
1395                 return ERR_PTR(-ENOMEM);
1396         }
1397
1398         return hw;
1399 }
1400 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1401
1402 int wl1251_free_hw(struct wl1251 *wl)
1403 {
1404         ieee80211_unregister_hw(wl->hw);
1405
1406         wl1251_debugfs_exit(wl);
1407
1408         kfree(wl->target_mem_map);
1409         kfree(wl->data_path);
1410         vfree(wl->fw);
1411         wl->fw = NULL;
1412         kfree(wl->nvs);
1413         wl->nvs = NULL;
1414
1415         kfree(wl->rx_descriptor);
1416         wl->rx_descriptor = NULL;
1417
1418         ieee80211_free_hw(wl->hw);
1419
1420         return 0;
1421 }
1422 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1423
1424 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1425 MODULE_LICENSE("GPL");
1426 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1427 MODULE_FIRMWARE(WL1251_FW_NAME);