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