drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/vmalloc.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "wl1251_reg.h"
  36 #include "wl1251_io.h"
  37 #include "wl1251_cmd.h"
  38 #include "wl1251_event.h"
  39 #include "wl1251_tx.h"
  40 #include "wl1251_rx.h"
  41 #include "wl1251_ps.h"
  42 #include "wl1251_init.h"
  43 #include "wl1251_debugfs.h"
  44 #include "wl1251_boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static void wl1251_power_off(struct wl1251 *wl)
  57 {
  58         wl->set_power(false);
  59 }
  60
  61 static void wl1251_power_on(struct wl1251 *wl)
  62 {
  63         wl->set_power(true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         memcpy(wl->nvs, fw->data, wl->nvs_len);
 135
 136         ret = 0;
 137
 138 out:
 139         release_firmware(fw);
 140
 141         return ret;
 142 }
 143
 144 static void wl1251_fw_wakeup(struct wl1251 *wl)
 145 {
 146         u32 elp_reg;
 147
 148         elp_reg = ELPCTRL_WAKE_UP;
 149         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 150         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 151
 152         if (!(elp_reg & ELPCTRL_WLAN_READY))
 153                 wl1251_warning("WLAN not ready");
 154 }
 155
 156 static int wl1251_chip_wakeup(struct wl1251 *wl)
 157 {
 158         int ret = 0;
 159
 160         wl1251_power_on(wl);
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         /* No NVS from netlink, try to get it from the filesystem */
 205         if (wl->nvs == NULL) {
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 10
 216 static void wl1251_irq_work(struct work_struct *work)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl =
 220                 container_of(work, struct wl1251, irq_work);
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 298                             WL1251_ACX_INTR_EVENT_B)) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 300                                      intr);
 301                         if (intr & WL1251_ACX_INTR_EVENT_A)
 302                                 wl1251_event_handle(wl, 0);
 303                         else
 304                                 wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 if (--ctr == 0)
 312                         break;
 313
 314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 315         } while (intr);
 316
 317 out_sleep:
 318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 319         wl1251_ps_elp_sleep(wl);
 320
 321 out:
 322         mutex_unlock(&wl->mutex);
 323 }
 324
 325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 326                        u16 beacon_interval, u8 dtim_period)
 327 {
 328         int ret;
 329
 330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 332                                      wl->tx_mgmt_frm_rate,
 333                                      wl->tx_mgmt_frm_mod);
 334         if (ret < 0)
 335                 goto out;
 336
 337
 338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 339                               dtim_period);
 340         if (ret < 0)
 341                 goto out;
 342
 343         /*
 344          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 345          * locking we just sleep instead, for now
 346          */
 347         msleep(10);
 348
 349 out:
 350         return ret;
 351 }
 352
 353 static void wl1251_filter_work(struct work_struct *work)
 354 {
 355         struct wl1251 *wl =
 356                 container_of(work, struct wl1251, filter_work);
 357         int ret;
 358
 359         mutex_lock(&wl->mutex);
 360
 361         if (wl->state == WL1251_STATE_OFF)
 362                 goto out;
 363
 364         ret = wl1251_ps_elp_wakeup(wl);
 365         if (ret < 0)
 366                 goto out;
 367
 368         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 369                           wl->dtim_period);
 370         if (ret < 0)
 371                 goto out_sleep;
 372
 373 out_sleep:
 374         wl1251_ps_elp_sleep(wl);
 375
 376 out:
 377         mutex_unlock(&wl->mutex);
 378 }
 379
 380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 381 {
 382         struct wl1251 *wl = hw->priv;
 383
 384         skb_queue_tail(&wl->tx_queue, skb);
 385
 386         /*
 387          * The chip specific setup must run before the first TX packet -
 388          * before that, the tx_work will not be initialized!
 389          */
 390
 391         ieee80211_queue_work(wl->hw, &wl->tx_work);
 392
 393         /*
 394          * The workqueue is slow to process the tx_queue and we need stop
 395          * the queue here, otherwise the queue will get too long.
 396          */
 397         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 398                 ieee80211_stop_queues(wl->hw);
 399
 400                 /*
 401                  * FIXME: this is racy, the variable is not properly
 402                  * protected. Maybe fix this by removing the stupid
 403                  * variable altogether and checking the real queue state?
 404                  */
 405                 wl->tx_queue_stopped = true;
 406         }
 407
 408         return NETDEV_TX_OK;
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         int ret = 0;
 415
 416         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 417
 418         mutex_lock(&wl->mutex);
 419
 420         if (wl->state != WL1251_STATE_OFF) {
 421                 wl1251_error("cannot start because not in off state: %d",
 422                              wl->state);
 423                 ret = -EBUSY;
 424                 goto out;
 425         }
 426
 427         ret = wl1251_chip_wakeup(wl);
 428         if (ret < 0)
 429                 goto out;
 430
 431         ret = wl1251_boot(wl);
 432         if (ret < 0)
 433                 goto out;
 434
 435         ret = wl1251_hw_init(wl);
 436         if (ret < 0)
 437                 goto out;
 438
 439         ret = wl1251_acx_station_id(wl);
 440         if (ret < 0)
 441                 goto out;
 442
 443         wl->state = WL1251_STATE_ON;
 444
 445         wl1251_info("firmware booted (%s)", wl->fw_ver);
 446
 447 out:
 448         if (ret < 0)
 449                 wl1251_power_off(wl);
 450
 451         mutex_unlock(&wl->mutex);
 452
 453         return ret;
 454 }
 455
 456 static void wl1251_op_stop(struct ieee80211_hw *hw)
 457 {
 458         struct wl1251 *wl = hw->priv;
 459
 460         wl1251_info("down");
 461
 462         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 463
 464         mutex_lock(&wl->mutex);
 465
 466         WARN_ON(wl->state != WL1251_STATE_ON);
 467
 468         if (wl->scanning) {
 469                 mutex_unlock(&wl->mutex);
 470                 ieee80211_scan_completed(wl->hw, true);
 471                 mutex_lock(&wl->mutex);
 472                 wl->scanning = false;
 473         }
 474
 475         wl->state = WL1251_STATE_OFF;
 476
 477         wl1251_disable_interrupts(wl);
 478
 479         mutex_unlock(&wl->mutex);
 480
 481         cancel_work_sync(&wl->irq_work);
 482         cancel_work_sync(&wl->tx_work);
 483         cancel_work_sync(&wl->filter_work);
 484
 485         mutex_lock(&wl->mutex);
 486
 487         /* let's notify MAC80211 about the remaining pending TX frames */
 488         wl1251_tx_flush(wl);
 489         wl1251_power_off(wl);
 490
 491         memset(wl->bssid, 0, ETH_ALEN);
 492         wl->listen_int = 1;
 493         wl->bss_type = MAX_BSS_TYPE;
 494
 495         wl->data_in_count = 0;
 496         wl->rx_counter = 0;
 497         wl->rx_handled = 0;
 498         wl->rx_current_buffer = 0;
 499         wl->rx_last_id = 0;
 500         wl->next_tx_complete = 0;
 501         wl->elp = false;
 502         wl->psm = 0;
 503         wl->tx_queue_stopped = false;
 504         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 505         wl->channel = WL1251_DEFAULT_CHANNEL;
 506
 507         wl1251_debugfs_reset(wl);
 508
 509         mutex_unlock(&wl->mutex);
 510 }
 511
 512 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 513                                    struct ieee80211_if_init_conf *conf)
 514 {
 515         struct wl1251 *wl = hw->priv;
 516         int ret = 0;
 517
 518         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 519                      conf->type, conf->mac_addr);
 520
 521         mutex_lock(&wl->mutex);
 522         if (wl->vif) {
 523                 ret = -EBUSY;
 524                 goto out;
 525         }
 526
 527         wl->vif = conf->vif;
 528
 529         switch (conf->type) {
 530         case NL80211_IFTYPE_STATION:
 531                 wl->bss_type = BSS_TYPE_STA_BSS;
 532                 break;
 533         case NL80211_IFTYPE_ADHOC:
 534                 wl->bss_type = BSS_TYPE_IBSS;
 535                 break;
 536         default:
 537                 ret = -EOPNOTSUPP;
 538                 goto out;
 539         }
 540
 541         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 542                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 543                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 544                 ret = wl1251_acx_station_id(wl);
 545                 if (ret < 0)
 546                         goto out;
 547         }
 548
 549 out:
 550         mutex_unlock(&wl->mutex);
 551         return ret;
 552 }
 553
 554 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 555                                          struct ieee80211_if_init_conf *conf)
 556 {
 557         struct wl1251 *wl = hw->priv;
 558
 559         mutex_lock(&wl->mutex);
 560         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 561         wl->vif = NULL;
 562         mutex_unlock(&wl->mutex);
 563 }
 564
 565 static int wl1251_build_null_data(struct wl1251 *wl)
 566 {
 567         struct wl12xx_null_data_template template;
 568
 569         if (!is_zero_ether_addr(wl->bssid)) {
 570                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 571                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 572         } else {
 573                 memset(template.header.da, 0xff, ETH_ALEN);
 574                 memset(template.header.bssid, 0xff, ETH_ALEN);
 575         }
 576
 577         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 578         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 579                                                 IEEE80211_STYPE_NULLFUNC |
 580                                                 IEEE80211_FCTL_TODS);
 581
 582         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
 583                                        sizeof(template));
 584
 585 }
 586
 587 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
 588 {
 589         struct wl12xx_ps_poll_template template;
 590
 591         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 592         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 593
 594         /* aid in PS-Poll has its two MSBs each set to 1 */
 595         template.aid = cpu_to_le16(1 << 15 | 1 << 14 | aid);
 596
 597         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 598
 599         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
 600                                        sizeof(template));
 601
 602 }
 603
 604 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 605 {
 606         struct wl1251 *wl = hw->priv;
 607         struct ieee80211_conf *conf = &hw->conf;
 608         int channel, ret = 0;
 609
 610         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 611
 612         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 613                      channel,
 614                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 615                      conf->power_level);
 616
 617         mutex_lock(&wl->mutex);
 618
 619         ret = wl1251_ps_elp_wakeup(wl);
 620         if (ret < 0)
 621                 goto out;
 622
 623         if (channel != wl->channel) {
 624                 wl->channel = channel;
 625
 626                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 627                                   wl->beacon_int, wl->dtim_period);
 628                 if (ret < 0)
 629                         goto out_sleep;
 630         }
 631
 632         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 633                 wl1251_debug(DEBUG_PSM, "psm enabled");
 634
 635                 wl->psm_requested = true;
 636
 637                 /*
 638                  * We enter PSM only if we're already associated.
 639                  * If we're not, we'll enter it when joining an SSID,
 640                  * through the bss_info_changed() hook.
 641                  */
 642                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 643         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 644                    wl->psm_requested) {
 645                 wl1251_debug(DEBUG_PSM, "psm disabled");
 646
 647                 wl->psm_requested = false;
 648
 649                 if (wl->psm)
 650                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 651         }
 652
 653         if (conf->power_level != wl->power_level) {
 654                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 655                 if (ret < 0)
 656                         goto out;
 657
 658                 wl->power_level = conf->power_level;
 659         }
 660
 661 out_sleep:
 662         wl1251_ps_elp_sleep(wl);
 663
 664 out:
 665         mutex_unlock(&wl->mutex);
 666
 667         return ret;
 668 }
 669
 670 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 671                                   FIF_ALLMULTI | \
 672                                   FIF_FCSFAIL | \
 673                                   FIF_BCN_PRBRESP_PROMISC | \
 674                                   FIF_CONTROL | \
 675                                   FIF_OTHER_BSS)
 676
 677 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 678                                        unsigned int changed,
 679                                        unsigned int *total,u64 multicast)
 680 {
 681         struct wl1251 *wl = hw->priv;
 682
 683         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 684
 685         *total &= WL1251_SUPPORTED_FILTERS;
 686         changed &= WL1251_SUPPORTED_FILTERS;
 687
 688         if (changed == 0)
 689                 /* no filters which we support changed */
 690                 return;
 691
 692         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 693
 694         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 695         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 696
 697         if (*total & FIF_PROMISC_IN_BSS) {
 698                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 699                 wl->rx_config |= CFG_RX_ALL_GOOD;
 700         }
 701         if (*total & FIF_ALLMULTI)
 702                 /*
 703                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 704                  * all multicast frames
 705                  */
 706                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 707         if (*total & FIF_FCSFAIL)
 708                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 709         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 710                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 711                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 712         }
 713         if (*total & FIF_CONTROL)
 714                 wl->rx_filter |= CFG_RX_CTL_EN;
 715         if (*total & FIF_OTHER_BSS)
 716                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 717
 718         /*
 719          * FIXME: workqueues need to be properly cancelled on stop(), for
 720          * now let's just disable changing the filter settings. They will
 721          * be updated any on config().
 722          */
 723         /* schedule_work(&wl->filter_work); */
 724 }
 725
 726 /* HW encryption */
 727 static int wl1251_set_key_type(struct wl1251 *wl,
 728                                struct wl1251_cmd_set_keys *key,
 729                                enum set_key_cmd cmd,
 730                                struct ieee80211_key_conf *mac80211_key,
 731                                const u8 *addr)
 732 {
 733         switch (mac80211_key->alg) {
 734         case ALG_WEP:
 735                 if (is_broadcast_ether_addr(addr))
 736                         key->key_type = KEY_WEP_DEFAULT;
 737                 else
 738                         key->key_type = KEY_WEP_ADDR;
 739
 740                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 741                 break;
 742         case ALG_TKIP:
 743                 if (is_broadcast_ether_addr(addr))
 744                         key->key_type = KEY_TKIP_MIC_GROUP;
 745                 else
 746                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 747
 748                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 749                 break;
 750         case ALG_CCMP:
 751                 if (is_broadcast_ether_addr(addr))
 752                         key->key_type = KEY_AES_GROUP;
 753                 else
 754                         key->key_type = KEY_AES_PAIRWISE;
 755                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 756                 break;
 757         default:
 758                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 759                 return -EOPNOTSUPP;
 760         }
 761
 762         return 0;
 763 }
 764
 765 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 766                              struct ieee80211_vif *vif,
 767                              struct ieee80211_sta *sta,
 768                              struct ieee80211_key_conf *key)
 769 {
 770         struct wl1251 *wl = hw->priv;
 771         struct wl1251_cmd_set_keys *wl_cmd;
 772         const u8 *addr;
 773         int ret;
 774
 775         static const u8 bcast_addr[ETH_ALEN] =
 776                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 777
 778         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 779
 780         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 781         if (!wl_cmd) {
 782                 ret = -ENOMEM;
 783                 goto out;
 784         }
 785
 786         addr = sta ? sta->addr : bcast_addr;
 787
 788         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 789         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 790         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 791                      key->alg, key->keyidx, key->keylen, key->flags);
 792         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 793
 794         if (is_zero_ether_addr(addr)) {
 795                 /* We dont support TX only encryption */
 796                 ret = -EOPNOTSUPP;
 797                 goto out;
 798         }
 799
 800         mutex_lock(&wl->mutex);
 801
 802         ret = wl1251_ps_elp_wakeup(wl);
 803         if (ret < 0)
 804                 goto out_unlock;
 805
 806         switch (cmd) {
 807         case SET_KEY:
 808                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 809                 break;
 810         case DISABLE_KEY:
 811                 wl_cmd->key_action = KEY_REMOVE;
 812                 break;
 813         default:
 814                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 815                 break;
 816         }
 817
 818         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 819         if (ret < 0) {
 820                 wl1251_error("Set KEY type failed");
 821                 goto out_sleep;
 822         }
 823
 824         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 825                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 826
 827         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 828             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 829                 /*
 830                  * We get the key in the following form:
 831                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 832                  * but the target is expecting:
 833                  * TKIP - RX MIC - TX MIC
 834                  */
 835                 memcpy(wl_cmd->key, key->key, 16);
 836                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 837                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 838
 839         } else {
 840                 memcpy(wl_cmd->key, key->key, key->keylen);
 841         }
 842         wl_cmd->key_size = key->keylen;
 843
 844         wl_cmd->id = key->keyidx;
 845         wl_cmd->ssid_profile = 0;
 846
 847         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 848
 849         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 850         if (ret < 0) {
 851                 wl1251_warning("could not set keys");
 852                 goto out_sleep;
 853         }
 854
 855 out_sleep:
 856         wl1251_ps_elp_sleep(wl);
 857
 858 out_unlock:
 859         mutex_unlock(&wl->mutex);
 860
 861 out:
 862         kfree(wl_cmd);
 863
 864         return ret;
 865 }
 866
 867 static int wl1251_build_basic_rates(char *rates)
 868 {
 869         u8 index = 0;
 870
 871         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 872         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 873         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 874         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 875
 876         return index;
 877 }
 878
 879 static int wl1251_build_extended_rates(char *rates)
 880 {
 881         u8 index = 0;
 882
 883         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 884         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 885         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 886         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 887         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 888         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 889         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 890         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 891
 892         return index;
 893 }
 894
 895
 896 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 897 {
 898         struct wl12xx_probe_req_template template;
 899         struct wl12xx_ie_rates *rates;
 900         char *ptr;
 901         u16 size;
 902
 903         ptr = (char *)&template;
 904         size = sizeof(struct ieee80211_header);
 905
 906         memset(template.header.da, 0xff, ETH_ALEN);
 907         memset(template.header.bssid, 0xff, ETH_ALEN);
 908         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 909         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 910
 911         /* IEs */
 912         /* SSID */
 913         template.ssid.header.id = WLAN_EID_SSID;
 914         template.ssid.header.len = ssid_len;
 915         if (ssid_len && ssid)
 916                 memcpy(template.ssid.ssid, ssid, ssid_len);
 917         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 918         ptr += size;
 919
 920         /* Basic Rates */
 921         rates = (struct wl12xx_ie_rates *)ptr;
 922         rates->header.id = WLAN_EID_SUPP_RATES;
 923         rates->header.len = wl1251_build_basic_rates(rates->rates);
 924         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 925         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 926
 927         /* Extended rates */
 928         rates = (struct wl12xx_ie_rates *)ptr;
 929         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 930         rates->header.len = wl1251_build_extended_rates(rates->rates);
 931         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 932
 933         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 934
 935         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 936                                       size);
 937 }
 938
 939 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
 940                           u8 active_scan, u8 high_prio, u8 num_channels,
 941                           u8 probe_requests)
 942 {
 943         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
 944         struct cmd_scan *params = NULL;
 945         int i, ret;
 946         u16 scan_options = 0;
 947
 948         if (wl->scanning)
 949                 return -EINVAL;
 950
 951         params = kzalloc(sizeof(*params), GFP_KERNEL);
 952         if (!params)
 953                 return -ENOMEM;
 954
 955         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 956         params->params.rx_filter_options =
 957                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 958
 959         /* High priority scan */
 960         if (!active_scan)
 961                 scan_options |= SCAN_PASSIVE;
 962         if (high_prio)
 963                 scan_options |= SCAN_PRIORITY_HIGH;
 964         params->params.scan_options = scan_options;
 965
 966         params->params.num_channels = num_channels;
 967         params->params.num_probe_requests = probe_requests;
 968         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 969         params->params.tid_trigger = 0;
 970
 971         for (i = 0; i < num_channels; i++) {
 972                 params->channels[i].min_duration = cpu_to_le32(30000);
 973                 params->channels[i].max_duration = cpu_to_le32(60000);
 974                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 975                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 976                 params->channels[i].early_termination = 0;
 977                 params->channels[i].tx_power_att = 0;
 978                 params->channels[i].channel = i + 1;
 979                 memset(params->channels[i].pad, 0, 3);
 980         }
 981
 982         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 983                 memset(&params->channels[i], 0,
 984                        sizeof(struct basic_scan_channel_parameters));
 985
 986         if (len && ssid) {
 987                 params->params.ssid_len = len;
 988                 memcpy(params->params.ssid, ssid, len);
 989         } else {
 990                 params->params.ssid_len = 0;
 991                 memset(params->params.ssid, 0, 32);
 992         }
 993
 994         ret = wl1251_build_probe_req(wl, ssid, len);
 995         if (ret < 0) {
 996                 wl1251_error("PROBE request template failed");
 997                 goto out;
 998         }
 999
1000         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
1001         if (!trigger)
1002                 goto out;
1003
1004         trigger->timeout = 0;
1005
1006         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
1007                               sizeof(*trigger));
1008         if (ret < 0) {
1009                 wl1251_error("trigger scan to failed for hw scan");
1010                 goto out;
1011         }
1012
1013         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
1014
1015         wl->scanning = true;
1016
1017         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
1018         if (ret < 0)
1019                 wl1251_error("SCAN failed");
1020
1021         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1022
1023         if (params->header.status != CMD_STATUS_SUCCESS) {
1024                 wl1251_error("TEST command answer error: %d",
1025                              params->header.status);
1026                 wl->scanning = false;
1027                 ret = -EIO;
1028                 goto out;
1029         }
1030
1031 out:
1032         kfree(params);
1033         return ret;
1034
1035 }
1036
1037 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1038                              struct cfg80211_scan_request *req)
1039 {
1040         struct wl1251 *wl = hw->priv;
1041         int ret;
1042         u8 *ssid = NULL;
1043         size_t ssid_len = 0;
1044
1045         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1046
1047         if (req->n_ssids) {
1048                 ssid = req->ssids[0].ssid;
1049                 ssid_len = req->ssids[0].ssid_len;
1050         }
1051
1052         mutex_lock(&wl->mutex);
1053
1054         ret = wl1251_ps_elp_wakeup(wl);
1055         if (ret < 0)
1056                 goto out;
1057
1058         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1059
1060         wl1251_ps_elp_sleep(wl);
1061
1062 out:
1063         mutex_unlock(&wl->mutex);
1064
1065         return ret;
1066 }
1067
1068 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1069 {
1070         struct wl1251 *wl = hw->priv;
1071         int ret;
1072
1073         mutex_lock(&wl->mutex);
1074
1075         ret = wl1251_ps_elp_wakeup(wl);
1076         if (ret < 0)
1077                 goto out;
1078
1079         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1080         if (ret < 0)
1081                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1082
1083         wl1251_ps_elp_sleep(wl);
1084
1085 out:
1086         mutex_unlock(&wl->mutex);
1087
1088         return ret;
1089 }
1090
1091 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1092                                        struct ieee80211_vif *vif,
1093                                        struct ieee80211_bss_conf *bss_conf,
1094                                        u32 changed)
1095 {
1096         enum wl1251_cmd_ps_mode mode;
1097         struct wl1251 *wl = hw->priv;
1098         struct sk_buff *beacon;
1099         int ret;
1100
1101         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1102
1103         mutex_lock(&wl->mutex);
1104
1105         ret = wl1251_ps_elp_wakeup(wl);
1106         if (ret < 0)
1107                 goto out;
1108
1109         if (changed & BSS_CHANGED_BSSID) {
1110                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1111
1112                 ret = wl1251_build_null_data(wl);
1113                 if (ret < 0)
1114                         goto out;
1115
1116                 if (wl->bss_type != BSS_TYPE_IBSS) {
1117                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1118                                           wl->beacon_int, wl->dtim_period);
1119                         if (ret < 0)
1120                                 goto out_sleep;
1121                 }
1122         }
1123
1124         if (changed & BSS_CHANGED_ASSOC) {
1125                 if (bss_conf->assoc) {
1126                         wl->beacon_int = bss_conf->beacon_int;
1127                         wl->dtim_period = bss_conf->dtim_period;
1128
1129                         ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
1130                                                           wl->dtim_period);
1131                         wl->aid = bss_conf->aid;
1132
1133                         ret = wl1251_build_ps_poll(wl, wl->aid);
1134                         if (ret < 0)
1135                                 goto out_sleep;
1136
1137                         ret = wl1251_acx_aid(wl, wl->aid);
1138                         if (ret < 0)
1139                                 goto out_sleep;
1140
1141                         /* If we want to go in PSM but we're not there yet */
1142                         if (wl->psm_requested && !wl->psm) {
1143                                 mode = STATION_POWER_SAVE_MODE;
1144                                 ret = wl1251_ps_set_mode(wl, mode);
1145                                 if (ret < 0)
1146                                         goto out_sleep;
1147                         }
1148                 } else {
1149                         /* use defaults when not associated */
1150                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1151                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1152                 }
1153         }
1154         if (changed & BSS_CHANGED_ERP_SLOT) {
1155                 if (bss_conf->use_short_slot)
1156                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1157                 else
1158                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1159                 if (ret < 0) {
1160                         wl1251_warning("Set slot time failed %d", ret);
1161                         goto out_sleep;
1162                 }
1163         }
1164
1165         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1166                 if (bss_conf->use_short_preamble)
1167                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1168                 else
1169                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1170         }
1171
1172         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1173                 if (bss_conf->use_cts_prot)
1174                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1175                 else
1176                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1177                 if (ret < 0) {
1178                         wl1251_warning("Set ctsprotect failed %d", ret);
1179                         goto out;
1180                 }
1181         }
1182
1183         if (changed & BSS_CHANGED_BEACON) {
1184                 beacon = ieee80211_beacon_get(hw, vif);
1185                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1186                                               beacon->len);
1187
1188                 if (ret < 0) {
1189                         dev_kfree_skb(beacon);
1190                         goto out;
1191                 }
1192
1193                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1194                                               beacon->len);
1195
1196                 dev_kfree_skb(beacon);
1197
1198                 if (ret < 0)
1199                         goto out;
1200
1201                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1202                                   wl->channel, wl->dtim_period);
1203
1204                 if (ret < 0)
1205                         goto out;
1206         }
1207
1208 out_sleep:
1209         wl1251_ps_elp_sleep(wl);
1210
1211 out:
1212         mutex_unlock(&wl->mutex);
1213 }
1214
1215
1216 /* can't be const, mac80211 writes to this */
1217 static struct ieee80211_rate wl1251_rates[] = {
1218         { .bitrate = 10,
1219           .hw_value = 0x1,
1220           .hw_value_short = 0x1, },
1221         { .bitrate = 20,
1222           .hw_value = 0x2,
1223           .hw_value_short = 0x2,
1224           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1225         { .bitrate = 55,
1226           .hw_value = 0x4,
1227           .hw_value_short = 0x4,
1228           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1229         { .bitrate = 110,
1230           .hw_value = 0x20,
1231           .hw_value_short = 0x20,
1232           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1233         { .bitrate = 60,
1234           .hw_value = 0x8,
1235           .hw_value_short = 0x8, },
1236         { .bitrate = 90,
1237           .hw_value = 0x10,
1238           .hw_value_short = 0x10, },
1239         { .bitrate = 120,
1240           .hw_value = 0x40,
1241           .hw_value_short = 0x40, },
1242         { .bitrate = 180,
1243           .hw_value = 0x80,
1244           .hw_value_short = 0x80, },
1245         { .bitrate = 240,
1246           .hw_value = 0x200,
1247           .hw_value_short = 0x200, },
1248         { .bitrate = 360,
1249          .hw_value = 0x400,
1250          .hw_value_short = 0x400, },
1251         { .bitrate = 480,
1252           .hw_value = 0x800,
1253           .hw_value_short = 0x800, },
1254         { .bitrate = 540,
1255           .hw_value = 0x1000,
1256           .hw_value_short = 0x1000, },
1257 };
1258
1259 /* can't be const, mac80211 writes to this */
1260 static struct ieee80211_channel wl1251_channels[] = {
1261         { .hw_value = 1, .center_freq = 2412},
1262         { .hw_value = 2, .center_freq = 2417},
1263         { .hw_value = 3, .center_freq = 2422},
1264         { .hw_value = 4, .center_freq = 2427},
1265         { .hw_value = 5, .center_freq = 2432},
1266         { .hw_value = 6, .center_freq = 2437},
1267         { .hw_value = 7, .center_freq = 2442},
1268         { .hw_value = 8, .center_freq = 2447},
1269         { .hw_value = 9, .center_freq = 2452},
1270         { .hw_value = 10, .center_freq = 2457},
1271         { .hw_value = 11, .center_freq = 2462},
1272         { .hw_value = 12, .center_freq = 2467},
1273         { .hw_value = 13, .center_freq = 2472},
1274 };
1275
1276 /* can't be const, mac80211 writes to this */
1277 static struct ieee80211_supported_band wl1251_band_2ghz = {
1278         .channels = wl1251_channels,
1279         .n_channels = ARRAY_SIZE(wl1251_channels),
1280         .bitrates = wl1251_rates,
1281         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1282 };
1283
1284 static const struct ieee80211_ops wl1251_ops = {
1285         .start = wl1251_op_start,
1286         .stop = wl1251_op_stop,
1287         .add_interface = wl1251_op_add_interface,
1288         .remove_interface = wl1251_op_remove_interface,
1289         .config = wl1251_op_config,
1290         .configure_filter = wl1251_op_configure_filter,
1291         .tx = wl1251_op_tx,
1292         .set_key = wl1251_op_set_key,
1293         .hw_scan = wl1251_op_hw_scan,
1294         .bss_info_changed = wl1251_op_bss_info_changed,
1295         .set_rts_threshold = wl1251_op_set_rts_threshold,
1296 };
1297
1298 static int wl1251_register_hw(struct wl1251 *wl)
1299 {
1300         int ret;
1301
1302         if (wl->mac80211_registered)
1303                 return 0;
1304
1305         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1306
1307         ret = ieee80211_register_hw(wl->hw);
1308         if (ret < 0) {
1309                 wl1251_error("unable to register mac80211 hw: %d", ret);
1310                 return ret;
1311         }
1312
1313         wl->mac80211_registered = true;
1314
1315         wl1251_notice("loaded");
1316
1317         return 0;
1318 }
1319
1320 int wl1251_init_ieee80211(struct wl1251 *wl)
1321 {
1322         int ret;
1323
1324         /* The tx descriptor buffer and the TKIP space */
1325         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1326                 + WL1251_TKIP_IV_SPACE;
1327
1328         /* unit us */
1329         /* FIXME: find a proper value */
1330         wl->hw->channel_change_time = 10000;
1331
1332         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1333                 IEEE80211_HW_NOISE_DBM |
1334                 IEEE80211_HW_SUPPORTS_PS |
1335                 IEEE80211_HW_BEACON_FILTER;
1336
1337         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1338         wl->hw->wiphy->max_scan_ssids = 1;
1339         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1340
1341         ret = wl1251_register_hw(wl);
1342         if (ret)
1343                 goto out;
1344
1345         wl1251_debugfs_init(wl);
1346         wl1251_notice("initialized");
1347
1348         ret = 0;
1349
1350 out:
1351         return ret;
1352 }
1353 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1354
1355 struct ieee80211_hw *wl1251_alloc_hw(void)
1356 {
1357         struct ieee80211_hw *hw;
1358         struct wl1251 *wl;
1359         int i;
1360         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1361
1362         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1363         if (!hw) {
1364                 wl1251_error("could not alloc ieee80211_hw");
1365                 return ERR_PTR(-ENOMEM);
1366         }
1367
1368         wl = hw->priv;
1369         memset(wl, 0, sizeof(*wl));
1370
1371         wl->hw = hw;
1372
1373         wl->data_in_count = 0;
1374
1375         skb_queue_head_init(&wl->tx_queue);
1376
1377         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1378         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1379         wl->channel = WL1251_DEFAULT_CHANNEL;
1380         wl->scanning = false;
1381         wl->default_key = 0;
1382         wl->listen_int = 1;
1383         wl->rx_counter = 0;
1384         wl->rx_handled = 0;
1385         wl->rx_current_buffer = 0;
1386         wl->rx_last_id = 0;
1387         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1388         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1389         wl->elp = false;
1390         wl->psm = 0;
1391         wl->psm_requested = false;
1392         wl->tx_queue_stopped = false;
1393         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1394         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1395         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1396         wl->vif = NULL;
1397
1398         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1399                 wl->tx_frames[i] = NULL;
1400
1401         wl->next_tx_complete = 0;
1402
1403         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1404         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1405
1406         /*
1407          * In case our MAC address is not correctly set,
1408          * we use a random but Nokia MAC.
1409          */
1410         memcpy(wl->mac_addr, nokia_oui, 3);
1411         get_random_bytes(wl->mac_addr + 3, 3);
1412
1413         wl->state = WL1251_STATE_OFF;
1414         mutex_init(&wl->mutex);
1415
1416         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1417         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1418
1419         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1420         if (!wl->rx_descriptor) {
1421                 wl1251_error("could not allocate memory for rx descriptor");
1422                 ieee80211_free_hw(hw);
1423                 return ERR_PTR(-ENOMEM);
1424         }
1425
1426         return hw;
1427 }
1428 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1429
1430 int wl1251_free_hw(struct wl1251 *wl)
1431 {
1432         ieee80211_unregister_hw(wl->hw);
1433
1434         wl1251_debugfs_exit(wl);
1435
1436         kfree(wl->target_mem_map);
1437         kfree(wl->data_path);
1438         vfree(wl->fw);
1439         wl->fw = NULL;
1440         kfree(wl->nvs);
1441         wl->nvs = NULL;
1442
1443         kfree(wl->rx_descriptor);
1444         wl->rx_descriptor = NULL;
1445
1446         ieee80211_free_hw(wl->hw);
1447
1448         return 0;
1449 }
1450 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1451
1452 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1453 MODULE_LICENSE("GPL");
1454 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1455 MODULE_ALIAS("spi:wl1251");
1456 MODULE_FIRMWARE(WL1251_FW_NAME);