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         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 345         if (ret < 0)
 346                 wl1251_warning("join timeout");
 347
 348 out:
 349         return ret;
 350 }
 351
 352 static void wl1251_filter_work(struct work_struct *work)
 353 {
 354         struct wl1251 *wl =
 355                 container_of(work, struct wl1251, filter_work);
 356         int ret;
 357
 358         mutex_lock(&wl->mutex);
 359
 360         if (wl->state == WL1251_STATE_OFF)
 361                 goto out;
 362
 363         ret = wl1251_ps_elp_wakeup(wl);
 364         if (ret < 0)
 365                 goto out;
 366
 367         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 368                           wl->dtim_period);
 369         if (ret < 0)
 370                 goto out_sleep;
 371
 372 out_sleep:
 373         wl1251_ps_elp_sleep(wl);
 374
 375 out:
 376         mutex_unlock(&wl->mutex);
 377 }
 378
 379 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 380 {
 381         struct wl1251 *wl = hw->priv;
 382         unsigned long flags;
 383
 384         skb_queue_tail(&wl->tx_queue, skb);
 385
 386         /*
 387          * The chip specific setup must run before the first TX packet -
 388          * before that, the tx_work will not be initialized!
 389          */
 390
 391         ieee80211_queue_work(wl->hw, &wl->tx_work);
 392
 393         /*
 394          * The workqueue is slow to process the tx_queue and we need stop
 395          * the queue here, otherwise the queue will get too long.
 396          */
 397         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 398                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 399
 400                 spin_lock_irqsave(&wl->wl_lock, flags);
 401                 ieee80211_stop_queues(wl->hw);
 402                 wl->tx_queue_stopped = true;
 403                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 404         }
 405
 406         return NETDEV_TX_OK;
 407 }
 408
 409 static int wl1251_op_start(struct ieee80211_hw *hw)
 410 {
 411         struct wl1251 *wl = hw->priv;
 412         struct wiphy *wiphy = hw->wiphy;
 413         int ret = 0;
 414
 415         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 416
 417         mutex_lock(&wl->mutex);
 418
 419         if (wl->state != WL1251_STATE_OFF) {
 420                 wl1251_error("cannot start because not in off state: %d",
 421                              wl->state);
 422                 ret = -EBUSY;
 423                 goto out;
 424         }
 425
 426         ret = wl1251_chip_wakeup(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         ret = wl1251_boot(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         ret = wl1251_hw_init(wl);
 435         if (ret < 0)
 436                 goto out;
 437
 438         ret = wl1251_acx_station_id(wl);
 439         if (ret < 0)
 440                 goto out;
 441
 442         wl->state = WL1251_STATE_ON;
 443
 444         wl1251_info("firmware booted (%s)", wl->fw_ver);
 445
 446         /* update hw/fw version info in wiphy struct */
 447         wiphy->hw_version = wl->chip_id;
 448         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 449
 450 out:
 451         if (ret < 0)
 452                 wl1251_power_off(wl);
 453
 454         mutex_unlock(&wl->mutex);
 455
 456         return ret;
 457 }
 458
 459 static void wl1251_op_stop(struct ieee80211_hw *hw)
 460 {
 461         struct wl1251 *wl = hw->priv;
 462
 463         wl1251_info("down");
 464
 465         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 466
 467         mutex_lock(&wl->mutex);
 468
 469         WARN_ON(wl->state != WL1251_STATE_ON);
 470
 471         if (wl->scanning) {
 472                 mutex_unlock(&wl->mutex);
 473                 ieee80211_scan_completed(wl->hw, true);
 474                 mutex_lock(&wl->mutex);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_work_sync(&wl->filter_work);
 487
 488         mutex_lock(&wl->mutex);
 489
 490         /* let's notify MAC80211 about the remaining pending TX frames */
 491         wl1251_tx_flush(wl);
 492         wl1251_power_off(wl);
 493
 494         memset(wl->bssid, 0, ETH_ALEN);
 495         wl->listen_int = 1;
 496         wl->bss_type = MAX_BSS_TYPE;
 497
 498         wl->data_in_count = 0;
 499         wl->rx_counter = 0;
 500         wl->rx_handled = 0;
 501         wl->rx_current_buffer = 0;
 502         wl->rx_last_id = 0;
 503         wl->next_tx_complete = 0;
 504         wl->elp = false;
 505         wl->psm = 0;
 506         wl->tx_queue_stopped = false;
 507         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 508         wl->channel = WL1251_DEFAULT_CHANNEL;
 509
 510         wl1251_debugfs_reset(wl);
 511
 512         mutex_unlock(&wl->mutex);
 513 }
 514
 515 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 516                                    struct ieee80211_vif *vif)
 517 {
 518         struct wl1251 *wl = hw->priv;
 519         int ret = 0;
 520
 521         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 522                      vif->type, vif->addr);
 523
 524         mutex_lock(&wl->mutex);
 525         if (wl->vif) {
 526                 ret = -EBUSY;
 527                 goto out;
 528         }
 529
 530         wl->vif = vif;
 531
 532         switch (vif->type) {
 533         case NL80211_IFTYPE_STATION:
 534                 wl->bss_type = BSS_TYPE_STA_BSS;
 535                 break;
 536         case NL80211_IFTYPE_ADHOC:
 537                 wl->bss_type = BSS_TYPE_IBSS;
 538                 break;
 539         default:
 540                 ret = -EOPNOTSUPP;
 541                 goto out;
 542         }
 543
 544         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 545                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 546                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 547                 ret = wl1251_acx_station_id(wl);
 548                 if (ret < 0)
 549                         goto out;
 550         }
 551
 552 out:
 553         mutex_unlock(&wl->mutex);
 554         return ret;
 555 }
 556
 557 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 558                                          struct ieee80211_vif *vif)
 559 {
 560         struct wl1251 *wl = hw->priv;
 561
 562         mutex_lock(&wl->mutex);
 563         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 564         wl->vif = NULL;
 565         mutex_unlock(&wl->mutex);
 566 }
 567
 568 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 569 {
 570         struct ieee80211_qos_hdr template;
 571
 572         memset(&template, 0, sizeof(template));
 573
 574         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 575         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 576         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 577
 578         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 579                                              IEEE80211_STYPE_QOS_NULLFUNC |
 580                                              IEEE80211_FCTL_TODS);
 581
 582         /* FIXME: not sure what priority to use here */
 583         template.qos_ctrl = cpu_to_le16(0);
 584
 585         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 586                                        sizeof(template));
 587 }
 588
 589 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 590 {
 591         struct wl1251 *wl = hw->priv;
 592         struct ieee80211_conf *conf = &hw->conf;
 593         int channel, ret = 0;
 594
 595         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 596
 597         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 598                      channel,
 599                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 600                      conf->power_level);
 601
 602         mutex_lock(&wl->mutex);
 603
 604         ret = wl1251_ps_elp_wakeup(wl);
 605         if (ret < 0)
 606                 goto out;
 607
 608         if (channel != wl->channel) {
 609                 wl->channel = channel;
 610
 611                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 612                                   wl->beacon_int, wl->dtim_period);
 613                 if (ret < 0)
 614                         goto out_sleep;
 615         }
 616
 617         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 618                 wl1251_debug(DEBUG_PSM, "psm enabled");
 619
 620                 wl->psm_requested = true;
 621
 622                 wl->dtim_period = conf->ps_dtim_period;
 623
 624                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 625                                                   wl->dtim_period);
 626
 627                 /*
 628                  * mac80211 enables PSM only if we're already associated.
 629                  */
 630                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 631                 if (ret < 0)
 632                         goto out_sleep;
 633         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 634                    wl->psm_requested) {
 635                 wl1251_debug(DEBUG_PSM, "psm disabled");
 636
 637                 wl->psm_requested = false;
 638
 639                 if (wl->psm) {
 640                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 641                         if (ret < 0)
 642                                 goto out_sleep;
 643                 }
 644         }
 645
 646         if (conf->power_level != wl->power_level) {
 647                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 648                 if (ret < 0)
 649                         goto out_sleep;
 650
 651                 wl->power_level = conf->power_level;
 652         }
 653
 654 out_sleep:
 655         wl1251_ps_elp_sleep(wl);
 656
 657 out:
 658         mutex_unlock(&wl->mutex);
 659
 660         return ret;
 661 }
 662
 663 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 664                                   FIF_ALLMULTI | \
 665                                   FIF_FCSFAIL | \
 666                                   FIF_BCN_PRBRESP_PROMISC | \
 667                                   FIF_CONTROL | \
 668                                   FIF_OTHER_BSS)
 669
 670 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 671                                        unsigned int changed,
 672                                        unsigned int *total,u64 multicast)
 673 {
 674         struct wl1251 *wl = hw->priv;
 675
 676         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 677
 678         *total &= WL1251_SUPPORTED_FILTERS;
 679         changed &= WL1251_SUPPORTED_FILTERS;
 680
 681         if (changed == 0)
 682                 /* no filters which we support changed */
 683                 return;
 684
 685         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 686
 687         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 688         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 689
 690         if (*total & FIF_PROMISC_IN_BSS) {
 691                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 692                 wl->rx_config |= CFG_RX_ALL_GOOD;
 693         }
 694         if (*total & FIF_ALLMULTI)
 695                 /*
 696                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 697                  * all multicast frames
 698                  */
 699                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 700         if (*total & FIF_FCSFAIL)
 701                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 702         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 703                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 704                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 705         }
 706         if (*total & FIF_CONTROL)
 707                 wl->rx_filter |= CFG_RX_CTL_EN;
 708         if (*total & FIF_OTHER_BSS)
 709                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 710
 711         /*
 712          * FIXME: workqueues need to be properly cancelled on stop(), for
 713          * now let's just disable changing the filter settings. They will
 714          * be updated any on config().
 715          */
 716         /* schedule_work(&wl->filter_work); */
 717 }
 718
 719 /* HW encryption */
 720 static int wl1251_set_key_type(struct wl1251 *wl,
 721                                struct wl1251_cmd_set_keys *key,
 722                                enum set_key_cmd cmd,
 723                                struct ieee80211_key_conf *mac80211_key,
 724                                const u8 *addr)
 725 {
 726         switch (mac80211_key->alg) {
 727         case ALG_WEP:
 728                 if (is_broadcast_ether_addr(addr))
 729                         key->key_type = KEY_WEP_DEFAULT;
 730                 else
 731                         key->key_type = KEY_WEP_ADDR;
 732
 733                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 734                 break;
 735         case ALG_TKIP:
 736                 if (is_broadcast_ether_addr(addr))
 737                         key->key_type = KEY_TKIP_MIC_GROUP;
 738                 else
 739                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 740
 741                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 742                 break;
 743         case ALG_CCMP:
 744                 if (is_broadcast_ether_addr(addr))
 745                         key->key_type = KEY_AES_GROUP;
 746                 else
 747                         key->key_type = KEY_AES_PAIRWISE;
 748                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 749                 break;
 750         default:
 751                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 752                 return -EOPNOTSUPP;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 759                              struct ieee80211_vif *vif,
 760                              struct ieee80211_sta *sta,
 761                              struct ieee80211_key_conf *key)
 762 {
 763         struct wl1251 *wl = hw->priv;
 764         struct wl1251_cmd_set_keys *wl_cmd;
 765         const u8 *addr;
 766         int ret;
 767
 768         static const u8 bcast_addr[ETH_ALEN] =
 769                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 770
 771         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 772
 773         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 774         if (!wl_cmd) {
 775                 ret = -ENOMEM;
 776                 goto out;
 777         }
 778
 779         addr = sta ? sta->addr : bcast_addr;
 780
 781         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 782         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 783         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 784                      key->alg, key->keyidx, key->keylen, key->flags);
 785         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 786
 787         if (is_zero_ether_addr(addr)) {
 788                 /* We dont support TX only encryption */
 789                 ret = -EOPNOTSUPP;
 790                 goto out;
 791         }
 792
 793         mutex_lock(&wl->mutex);
 794
 795         ret = wl1251_ps_elp_wakeup(wl);
 796         if (ret < 0)
 797                 goto out_unlock;
 798
 799         switch (cmd) {
 800         case SET_KEY:
 801                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 802                 break;
 803         case DISABLE_KEY:
 804                 wl_cmd->key_action = KEY_REMOVE;
 805                 break;
 806         default:
 807                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 808                 break;
 809         }
 810
 811         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 812         if (ret < 0) {
 813                 wl1251_error("Set KEY type failed");
 814                 goto out_sleep;
 815         }
 816
 817         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 818                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 819
 820         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 821             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 822                 /*
 823                  * We get the key in the following form:
 824                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 825                  * but the target is expecting:
 826                  * TKIP - RX MIC - TX MIC
 827                  */
 828                 memcpy(wl_cmd->key, key->key, 16);
 829                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 830                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 831
 832         } else {
 833                 memcpy(wl_cmd->key, key->key, key->keylen);
 834         }
 835         wl_cmd->key_size = key->keylen;
 836
 837         wl_cmd->id = key->keyidx;
 838         wl_cmd->ssid_profile = 0;
 839
 840         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 841
 842         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 843         if (ret < 0) {
 844                 wl1251_warning("could not set keys");
 845                 goto out_sleep;
 846         }
 847
 848 out_sleep:
 849         wl1251_ps_elp_sleep(wl);
 850
 851 out_unlock:
 852         mutex_unlock(&wl->mutex);
 853
 854 out:
 855         kfree(wl_cmd);
 856
 857         return ret;
 858 }
 859
 860 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 861                              struct cfg80211_scan_request *req)
 862 {
 863         struct wl1251 *wl = hw->priv;
 864         struct sk_buff *skb;
 865         size_t ssid_len = 0;
 866         u8 *ssid = NULL;
 867         int ret;
 868
 869         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 870
 871         if (req->n_ssids) {
 872                 ssid = req->ssids[0].ssid;
 873                 ssid_len = req->ssids[0].ssid_len;
 874         }
 875
 876         mutex_lock(&wl->mutex);
 877
 878         if (wl->scanning) {
 879                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 880                 ret = -EINVAL;
 881                 goto out;
 882         }
 883
 884         ret = wl1251_ps_elp_wakeup(wl);
 885         if (ret < 0)
 886                 goto out;
 887
 888         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 889                                      req->ie, req->ie_len);
 890         if (!skb) {
 891                 ret = -ENOMEM;
 892                 goto out;
 893         }
 894
 895         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 896                                       skb->len);
 897         dev_kfree_skb(skb);
 898         if (ret < 0)
 899                 goto out_sleep;
 900
 901         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 902         if (ret < 0)
 903                 goto out_sleep;
 904
 905         wl->scanning = true;
 906
 907         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 908                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 909         if (ret < 0) {
 910                 wl->scanning = false;
 911                 goto out_sleep;
 912         }
 913
 914 out_sleep:
 915         wl1251_ps_elp_sleep(wl);
 916
 917 out:
 918         mutex_unlock(&wl->mutex);
 919
 920         return ret;
 921 }
 922
 923 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 924 {
 925         struct wl1251 *wl = hw->priv;
 926         int ret;
 927
 928         mutex_lock(&wl->mutex);
 929
 930         ret = wl1251_ps_elp_wakeup(wl);
 931         if (ret < 0)
 932                 goto out;
 933
 934         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 935         if (ret < 0)
 936                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 937
 938         wl1251_ps_elp_sleep(wl);
 939
 940 out:
 941         mutex_unlock(&wl->mutex);
 942
 943         return ret;
 944 }
 945
 946 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 947                                        struct ieee80211_vif *vif,
 948                                        struct ieee80211_bss_conf *bss_conf,
 949                                        u32 changed)
 950 {
 951         struct wl1251 *wl = hw->priv;
 952         struct sk_buff *beacon, *skb;
 953         int ret;
 954
 955         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 956
 957         mutex_lock(&wl->mutex);
 958
 959         ret = wl1251_ps_elp_wakeup(wl);
 960         if (ret < 0)
 961                 goto out;
 962
 963         if (changed & BSS_CHANGED_BSSID) {
 964                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 965
 966                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 967                 if (!skb)
 968                         goto out_sleep;
 969
 970                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 971                                               skb->data, skb->len);
 972                 dev_kfree_skb(skb);
 973                 if (ret < 0)
 974                         goto out_sleep;
 975
 976                 ret = wl1251_build_qos_null_data(wl);
 977                 if (ret < 0)
 978                         goto out;
 979
 980                 if (wl->bss_type != BSS_TYPE_IBSS) {
 981                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 982                                           wl->beacon_int, wl->dtim_period);
 983                         if (ret < 0)
 984                                 goto out_sleep;
 985                 }
 986         }
 987
 988         if (changed & BSS_CHANGED_ASSOC) {
 989                 if (bss_conf->assoc) {
 990                         wl->beacon_int = bss_conf->beacon_int;
 991
 992                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 993                         if (!skb)
 994                                 goto out_sleep;
 995
 996                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 997                                                       skb->data,
 998                                                       skb->len);
 999                         dev_kfree_skb(skb);
1000                         if (ret < 0)
1001                                 goto out_sleep;
1002
1003                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1004                         if (ret < 0)
1005                                 goto out_sleep;
1006                 } else {
1007                         /* use defaults when not associated */
1008                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1009                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1010                 }
1011         }
1012         if (changed & BSS_CHANGED_ERP_SLOT) {
1013                 if (bss_conf->use_short_slot)
1014                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1015                 else
1016                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1017                 if (ret < 0) {
1018                         wl1251_warning("Set slot time failed %d", ret);
1019                         goto out_sleep;
1020                 }
1021         }
1022
1023         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1024                 if (bss_conf->use_short_preamble)
1025                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1026                 else
1027                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1028         }
1029
1030         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1031                 if (bss_conf->use_cts_prot)
1032                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1033                 else
1034                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1035                 if (ret < 0) {
1036                         wl1251_warning("Set ctsprotect failed %d", ret);
1037                         goto out_sleep;
1038                 }
1039         }
1040
1041         if (changed & BSS_CHANGED_BEACON) {
1042                 beacon = ieee80211_beacon_get(hw, vif);
1043                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1044                                               beacon->len);
1045
1046                 if (ret < 0) {
1047                         dev_kfree_skb(beacon);
1048                         goto out_sleep;
1049                 }
1050
1051                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1052                                               beacon->len);
1053
1054                 dev_kfree_skb(beacon);
1055
1056                 if (ret < 0)
1057                         goto out_sleep;
1058
1059                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1060                                   wl->channel, wl->dtim_period);
1061
1062                 if (ret < 0)
1063                         goto out_sleep;
1064         }
1065
1066 out_sleep:
1067         wl1251_ps_elp_sleep(wl);
1068
1069 out:
1070         mutex_unlock(&wl->mutex);
1071 }
1072
1073
1074 /* can't be const, mac80211 writes to this */
1075 static struct ieee80211_rate wl1251_rates[] = {
1076         { .bitrate = 10,
1077           .hw_value = 0x1,
1078           .hw_value_short = 0x1, },
1079         { .bitrate = 20,
1080           .hw_value = 0x2,
1081           .hw_value_short = 0x2,
1082           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1083         { .bitrate = 55,
1084           .hw_value = 0x4,
1085           .hw_value_short = 0x4,
1086           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1087         { .bitrate = 110,
1088           .hw_value = 0x20,
1089           .hw_value_short = 0x20,
1090           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1091         { .bitrate = 60,
1092           .hw_value = 0x8,
1093           .hw_value_short = 0x8, },
1094         { .bitrate = 90,
1095           .hw_value = 0x10,
1096           .hw_value_short = 0x10, },
1097         { .bitrate = 120,
1098           .hw_value = 0x40,
1099           .hw_value_short = 0x40, },
1100         { .bitrate = 180,
1101           .hw_value = 0x80,
1102           .hw_value_short = 0x80, },
1103         { .bitrate = 240,
1104           .hw_value = 0x200,
1105           .hw_value_short = 0x200, },
1106         { .bitrate = 360,
1107          .hw_value = 0x400,
1108          .hw_value_short = 0x400, },
1109         { .bitrate = 480,
1110           .hw_value = 0x800,
1111           .hw_value_short = 0x800, },
1112         { .bitrate = 540,
1113           .hw_value = 0x1000,
1114           .hw_value_short = 0x1000, },
1115 };
1116
1117 /* can't be const, mac80211 writes to this */
1118 static struct ieee80211_channel wl1251_channels[] = {
1119         { .hw_value = 1, .center_freq = 2412},
1120         { .hw_value = 2, .center_freq = 2417},
1121         { .hw_value = 3, .center_freq = 2422},
1122         { .hw_value = 4, .center_freq = 2427},
1123         { .hw_value = 5, .center_freq = 2432},
1124         { .hw_value = 6, .center_freq = 2437},
1125         { .hw_value = 7, .center_freq = 2442},
1126         { .hw_value = 8, .center_freq = 2447},
1127         { .hw_value = 9, .center_freq = 2452},
1128         { .hw_value = 10, .center_freq = 2457},
1129         { .hw_value = 11, .center_freq = 2462},
1130         { .hw_value = 12, .center_freq = 2467},
1131         { .hw_value = 13, .center_freq = 2472},
1132 };
1133
1134 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1135                              const struct ieee80211_tx_queue_params *params)
1136 {
1137         enum wl1251_acx_ps_scheme ps_scheme;
1138         struct wl1251 *wl = hw->priv;
1139         int ret;
1140
1141         mutex_lock(&wl->mutex);
1142
1143         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1144
1145         ret = wl1251_ps_elp_wakeup(wl);
1146         if (ret < 0)
1147                 goto out;
1148
1149         /* mac80211 uses units of 32 usec */
1150         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1151                                 params->cw_min, params->cw_max,
1152                                 params->aifs, params->txop * 32);
1153         if (ret < 0)
1154                 goto out_sleep;
1155
1156         if (params->uapsd)
1157                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1158         else
1159                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1160
1161         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1162                                  CHANNEL_TYPE_EDCF,
1163                                  wl1251_tx_get_queue(queue), ps_scheme,
1164                                  WL1251_ACX_ACK_POLICY_LEGACY);
1165         if (ret < 0)
1166                 goto out_sleep;
1167
1168 out_sleep:
1169         wl1251_ps_elp_sleep(wl);
1170
1171 out:
1172         mutex_unlock(&wl->mutex);
1173
1174         return ret;
1175 }
1176
1177 /* can't be const, mac80211 writes to this */
1178 static struct ieee80211_supported_band wl1251_band_2ghz = {
1179         .channels = wl1251_channels,
1180         .n_channels = ARRAY_SIZE(wl1251_channels),
1181         .bitrates = wl1251_rates,
1182         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1183 };
1184
1185 static const struct ieee80211_ops wl1251_ops = {
1186         .start = wl1251_op_start,
1187         .stop = wl1251_op_stop,
1188         .add_interface = wl1251_op_add_interface,
1189         .remove_interface = wl1251_op_remove_interface,
1190         .config = wl1251_op_config,
1191         .configure_filter = wl1251_op_configure_filter,
1192         .tx = wl1251_op_tx,
1193         .set_key = wl1251_op_set_key,
1194         .hw_scan = wl1251_op_hw_scan,
1195         .bss_info_changed = wl1251_op_bss_info_changed,
1196         .set_rts_threshold = wl1251_op_set_rts_threshold,
1197         .conf_tx = wl1251_op_conf_tx,
1198 };
1199
1200 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1201 {
1202         unsigned long timeout;
1203
1204         wl1251_reg_write32(wl, EE_ADDR, offset);
1205         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1206
1207         /* EE_CTL_READ clears when data is ready */
1208         timeout = jiffies + msecs_to_jiffies(100);
1209         while (1) {
1210                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1211                         break;
1212
1213                 if (time_after(jiffies, timeout))
1214                         return -ETIMEDOUT;
1215
1216                 msleep(1);
1217         }
1218
1219         *data = wl1251_reg_read32(wl, EE_DATA);
1220         return 0;
1221 }
1222
1223 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1224                               u8 *data, size_t len)
1225 {
1226         size_t i;
1227         int ret;
1228
1229         wl1251_reg_write32(wl, EE_START, 0);
1230
1231         for (i = 0; i < len; i++) {
1232                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1233                 if (ret < 0)
1234                         return ret;
1235         }
1236
1237         return 0;
1238 }
1239
1240 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1241 {
1242         u8 mac[ETH_ALEN];
1243         int i, ret;
1244
1245         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1246
1247         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1248         if (ret < 0) {
1249                 wl1251_warning("failed to read MAC address from EEPROM");
1250                 return ret;
1251         }
1252
1253         /* MAC is stored in reverse order */
1254         for (i = 0; i < ETH_ALEN; i++)
1255                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1256
1257         return 0;
1258 }
1259
1260 static int wl1251_register_hw(struct wl1251 *wl)
1261 {
1262         int ret;
1263
1264         if (wl->mac80211_registered)
1265                 return 0;
1266
1267         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1268
1269         ret = ieee80211_register_hw(wl->hw);
1270         if (ret < 0) {
1271                 wl1251_error("unable to register mac80211 hw: %d", ret);
1272                 return ret;
1273         }
1274
1275         wl->mac80211_registered = true;
1276
1277         wl1251_notice("loaded");
1278
1279         return 0;
1280 }
1281
1282 int wl1251_init_ieee80211(struct wl1251 *wl)
1283 {
1284         int ret;
1285
1286         /* The tx descriptor buffer and the TKIP space */
1287         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1288                 + WL1251_TKIP_IV_SPACE;
1289
1290         /* unit us */
1291         /* FIXME: find a proper value */
1292         wl->hw->channel_change_time = 10000;
1293
1294         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1295                 IEEE80211_HW_NOISE_DBM |
1296                 IEEE80211_HW_SUPPORTS_PS |
1297                 IEEE80211_HW_BEACON_FILTER |
1298                 IEEE80211_HW_SUPPORTS_UAPSD;
1299
1300         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1301         wl->hw->wiphy->max_scan_ssids = 1;
1302         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1303
1304         wl->hw->queues = 4;
1305
1306         if (wl->use_eeprom)
1307                 wl1251_read_eeprom_mac(wl);
1308
1309         ret = wl1251_register_hw(wl);
1310         if (ret)
1311                 goto out;
1312
1313         wl1251_debugfs_init(wl);
1314         wl1251_notice("initialized");
1315
1316         ret = 0;
1317
1318 out:
1319         return ret;
1320 }
1321 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1322
1323 struct ieee80211_hw *wl1251_alloc_hw(void)
1324 {
1325         struct ieee80211_hw *hw;
1326         struct wl1251 *wl;
1327         int i;
1328         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1329
1330         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1331         if (!hw) {
1332                 wl1251_error("could not alloc ieee80211_hw");
1333                 return ERR_PTR(-ENOMEM);
1334         }
1335
1336         wl = hw->priv;
1337         memset(wl, 0, sizeof(*wl));
1338
1339         wl->hw = hw;
1340
1341         wl->data_in_count = 0;
1342
1343         skb_queue_head_init(&wl->tx_queue);
1344
1345         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1346         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1347         wl->channel = WL1251_DEFAULT_CHANNEL;
1348         wl->scanning = false;
1349         wl->default_key = 0;
1350         wl->listen_int = 1;
1351         wl->rx_counter = 0;
1352         wl->rx_handled = 0;
1353         wl->rx_current_buffer = 0;
1354         wl->rx_last_id = 0;
1355         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1356         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1357         wl->elp = false;
1358         wl->psm = 0;
1359         wl->psm_requested = false;
1360         wl->tx_queue_stopped = false;
1361         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1362         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1363         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1364         wl->vif = NULL;
1365
1366         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1367                 wl->tx_frames[i] = NULL;
1368
1369         wl->next_tx_complete = 0;
1370
1371         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1372         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1373
1374         /*
1375          * In case our MAC address is not correctly set,
1376          * we use a random but Nokia MAC.
1377          */
1378         memcpy(wl->mac_addr, nokia_oui, 3);
1379         get_random_bytes(wl->mac_addr + 3, 3);
1380
1381         wl->state = WL1251_STATE_OFF;
1382         mutex_init(&wl->mutex);
1383
1384         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1385         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1386
1387         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1388         if (!wl->rx_descriptor) {
1389                 wl1251_error("could not allocate memory for rx descriptor");
1390                 ieee80211_free_hw(hw);
1391                 return ERR_PTR(-ENOMEM);
1392         }
1393
1394         return hw;
1395 }
1396 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1397
1398 int wl1251_free_hw(struct wl1251 *wl)
1399 {
1400         ieee80211_unregister_hw(wl->hw);
1401
1402         wl1251_debugfs_exit(wl);
1403
1404         kfree(wl->target_mem_map);
1405         kfree(wl->data_path);
1406         vfree(wl->fw);
1407         wl->fw = NULL;
1408         kfree(wl->nvs);
1409         wl->nvs = NULL;
1410
1411         kfree(wl->rx_descriptor);
1412         wl->rx_descriptor = NULL;
1413
1414         ieee80211_free_hw(wl->hw);
1415
1416         return 0;
1417 }
1418 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1419
1420 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1421 MODULE_LICENSE("GPL");
1422 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1423 MODULE_FIRMWARE(WL1251_FW_NAME);