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_ops.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
  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, wl->chip.fw_filename, 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, wl->chip.nvs_filename, 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(wl->chip.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
 186                 wl1251_setup(wl);
 187
 188                 break;
 189         case CHIP_ID_1251_PG10:
 190         case CHIP_ID_1251_PG11:
 191         default:
 192                 wl1251_error("unsupported chip id: 0x%x", wl->chip.id);
 193                 ret = -ENODEV;
 194                 goto out;
 195         }
 196
 197         if (wl->fw == NULL) {
 198                 ret = wl1251_fetch_firmware(wl);
 199                 if (ret < 0)
 200                         goto out;
 201         }
 202
 203         /* No NVS from netlink, try to get it from the filesystem */
 204         if (wl->nvs == NULL) {
 205                 ret = wl1251_fetch_nvs(wl);
 206                 if (ret < 0)
 207                         goto out;
 208         }
 209
 210 out:
 211         return ret;
 212 }
 213
 214 static void wl1251_filter_work(struct work_struct *work)
 215 {
 216         struct wl1251 *wl =
 217                 container_of(work, struct wl1251, filter_work);
 218         int ret;
 219
 220         mutex_lock(&wl->mutex);
 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         /* FIXME: replace the magic numbers with proper definitions */
 230         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 231         if (ret < 0)
 232                 goto out_sleep;
 233
 234 out_sleep:
 235         wl1251_ps_elp_sleep(wl);
 236
 237 out:
 238         mutex_unlock(&wl->mutex);
 239 }
 240
 241 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 242 {
 243         struct wl1251 *wl = hw->priv;
 244
 245         skb_queue_tail(&wl->tx_queue, skb);
 246
 247         /*
 248          * The chip specific setup must run before the first TX packet -
 249          * before that, the tx_work will not be initialized!
 250          */
 251
 252         schedule_work(&wl->tx_work);
 253
 254         /*
 255          * The workqueue is slow to process the tx_queue and we need stop
 256          * the queue here, otherwise the queue will get too long.
 257          */
 258         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 259                 ieee80211_stop_queues(wl->hw);
 260
 261                 /*
 262                  * FIXME: this is racy, the variable is not properly
 263                  * protected. Maybe fix this by removing the stupid
 264                  * variable altogether and checking the real queue state?
 265                  */
 266                 wl->tx_queue_stopped = true;
 267         }
 268
 269         return NETDEV_TX_OK;
 270 }
 271
 272 static int wl1251_op_start(struct ieee80211_hw *hw)
 273 {
 274         struct wl1251 *wl = hw->priv;
 275         int ret = 0;
 276
 277         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 278
 279         mutex_lock(&wl->mutex);
 280
 281         if (wl->state != WL1251_STATE_OFF) {
 282                 wl1251_error("cannot start because not in off state: %d",
 283                              wl->state);
 284                 ret = -EBUSY;
 285                 goto out;
 286         }
 287
 288         ret = wl1251_chip_wakeup(wl);
 289         if (ret < 0)
 290                 goto out;
 291
 292         ret = wl->chip.op_boot(wl);
 293         if (ret < 0)
 294                 goto out;
 295
 296         ret = wl->chip.op_hw_init(wl);
 297         if (ret < 0)
 298                 goto out;
 299
 300         ret = wl1251_acx_station_id(wl);
 301         if (ret < 0)
 302                 goto out;
 303
 304         wl->state = WL1251_STATE_ON;
 305
 306         wl1251_info("firmware booted (%s)", wl->chip.fw_ver);
 307
 308 out:
 309         if (ret < 0)
 310                 wl1251_power_off(wl);
 311
 312         mutex_unlock(&wl->mutex);
 313
 314         return ret;
 315 }
 316
 317 static void wl1251_op_stop(struct ieee80211_hw *hw)
 318 {
 319         struct wl1251 *wl = hw->priv;
 320
 321         wl1251_info("down");
 322
 323         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 324
 325         mutex_lock(&wl->mutex);
 326
 327         WARN_ON(wl->state != WL1251_STATE_ON);
 328
 329         if (wl->scanning) {
 330                 mutex_unlock(&wl->mutex);
 331                 ieee80211_scan_completed(wl->hw, true);
 332                 mutex_lock(&wl->mutex);
 333                 wl->scanning = false;
 334         }
 335
 336         wl->state = WL1251_STATE_OFF;
 337
 338         wl1251_disable_interrupts(wl);
 339
 340         mutex_unlock(&wl->mutex);
 341
 342         cancel_work_sync(&wl->irq_work);
 343         cancel_work_sync(&wl->tx_work);
 344         cancel_work_sync(&wl->filter_work);
 345
 346         mutex_lock(&wl->mutex);
 347
 348         /* let's notify MAC80211 about the remaining pending TX frames */
 349         wl->chip.op_tx_flush(wl);
 350         wl1251_power_off(wl);
 351
 352         memset(wl->bssid, 0, ETH_ALEN);
 353         wl->listen_int = 1;
 354         wl->bss_type = MAX_BSS_TYPE;
 355
 356         wl->data_in_count = 0;
 357         wl->rx_counter = 0;
 358         wl->rx_handled = 0;
 359         wl->rx_current_buffer = 0;
 360         wl->rx_last_id = 0;
 361         wl->next_tx_complete = 0;
 362         wl->elp = false;
 363         wl->psm = 0;
 364         wl->tx_queue_stopped = false;
 365         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 366
 367         wl1251_debugfs_reset(wl);
 368
 369         mutex_unlock(&wl->mutex);
 370 }
 371
 372 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 373                                    struct ieee80211_if_init_conf *conf)
 374 {
 375         struct wl1251 *wl = hw->priv;
 376         int ret = 0;
 377
 378         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 379                      conf->type, conf->mac_addr);
 380
 381         mutex_lock(&wl->mutex);
 382
 383         switch (conf->type) {
 384         case NL80211_IFTYPE_STATION:
 385                 wl->bss_type = BSS_TYPE_STA_BSS;
 386                 break;
 387         case NL80211_IFTYPE_ADHOC:
 388                 wl->bss_type = BSS_TYPE_IBSS;
 389                 break;
 390         default:
 391                 ret = -EOPNOTSUPP;
 392                 goto out;
 393         }
 394
 395         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 396                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 397                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 398                 ret = wl1251_acx_station_id(wl);
 399                 if (ret < 0)
 400                         goto out;
 401         }
 402
 403 out:
 404         mutex_unlock(&wl->mutex);
 405         return ret;
 406 }
 407
 408 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 409                                          struct ieee80211_if_init_conf *conf)
 410 {
 411         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 412 }
 413
 414 static int wl1251_build_null_data(struct wl1251 *wl)
 415 {
 416         struct wl12xx_null_data_template template;
 417
 418         if (!is_zero_ether_addr(wl->bssid)) {
 419                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 420                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 421         } else {
 422                 memset(template.header.da, 0xff, ETH_ALEN);
 423                 memset(template.header.bssid, 0xff, ETH_ALEN);
 424         }
 425
 426         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 427         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 428                                                 IEEE80211_STYPE_NULLFUNC);
 429
 430         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
 431                                        sizeof(template));
 432
 433 }
 434
 435 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
 436 {
 437         struct wl12xx_ps_poll_template template;
 438
 439         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 440         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 441         template.aid = aid;
 442         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 443
 444         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
 445                                        sizeof(template));
 446
 447 }
 448
 449 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 450 {
 451         struct wl1251 *wl = hw->priv;
 452         struct ieee80211_conf *conf = &hw->conf;
 453         int channel, ret = 0;
 454
 455         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 456
 457         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 458                      channel,
 459                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 460                      conf->power_level);
 461
 462         mutex_lock(&wl->mutex);
 463
 464         ret = wl1251_ps_elp_wakeup(wl);
 465         if (ret < 0)
 466                 goto out;
 467
 468         if (channel != wl->channel) {
 469                 /* FIXME: use beacon interval provided by mac80211 */
 470                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
 471                 if (ret < 0)
 472                         goto out_sleep;
 473
 474                 wl->channel = channel;
 475         }
 476
 477         ret = wl1251_build_null_data(wl);
 478         if (ret < 0)
 479                 goto out_sleep;
 480
 481         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 482                 wl1251_debug(DEBUG_PSM, "psm enabled");
 483
 484                 wl->psm_requested = true;
 485
 486                 /*
 487                  * We enter PSM only if we're already associated.
 488                  * If we're not, we'll enter it when joining an SSID,
 489                  * through the bss_info_changed() hook.
 490                  */
 491                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 492         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 493                    wl->psm_requested) {
 494                 wl1251_debug(DEBUG_PSM, "psm disabled");
 495
 496                 wl->psm_requested = false;
 497
 498                 if (wl->psm)
 499                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 500         }
 501
 502         if (conf->power_level != wl->power_level) {
 503                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 504                 if (ret < 0)
 505                         goto out;
 506
 507                 wl->power_level = conf->power_level;
 508         }
 509
 510 out_sleep:
 511         wl1251_ps_elp_sleep(wl);
 512
 513 out:
 514         mutex_unlock(&wl->mutex);
 515
 516         return ret;
 517 }
 518
 519 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 520                                   FIF_ALLMULTI | \
 521                                   FIF_FCSFAIL | \
 522                                   FIF_BCN_PRBRESP_PROMISC | \
 523                                   FIF_CONTROL | \
 524                                   FIF_OTHER_BSS)
 525
 526 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 527                                        unsigned int changed,
 528                                        unsigned int *total,
 529                                        int mc_count,
 530                                        struct dev_addr_list *mc_list)
 531 {
 532         struct wl1251 *wl = hw->priv;
 533
 534         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 535
 536         *total &= WL1251_SUPPORTED_FILTERS;
 537         changed &= WL1251_SUPPORTED_FILTERS;
 538
 539         if (changed == 0)
 540                 /* no filters which we support changed */
 541                 return;
 542
 543         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 544
 545         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 546         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 547
 548         if (*total & FIF_PROMISC_IN_BSS) {
 549                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 550                 wl->rx_config |= CFG_RX_ALL_GOOD;
 551         }
 552         if (*total & FIF_ALLMULTI)
 553                 /*
 554                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 555                  * all multicast frames
 556                  */
 557                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 558         if (*total & FIF_FCSFAIL)
 559                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 560         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 561                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 562                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 563         }
 564         if (*total & FIF_CONTROL)
 565                 wl->rx_filter |= CFG_RX_CTL_EN;
 566         if (*total & FIF_OTHER_BSS)
 567                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 568
 569         /*
 570          * FIXME: workqueues need to be properly cancelled on stop(), for
 571          * now let's just disable changing the filter settings. They will
 572          * be updated any on config().
 573          */
 574         /* schedule_work(&wl->filter_work); */
 575 }
 576
 577 /* HW encryption */
 578 static int wl1251_set_key_type(struct wl1251 *wl,
 579                                struct wl1251_cmd_set_keys *key,
 580                                enum set_key_cmd cmd,
 581                                struct ieee80211_key_conf *mac80211_key,
 582                                const u8 *addr)
 583 {
 584         switch (mac80211_key->alg) {
 585         case ALG_WEP:
 586                 if (is_broadcast_ether_addr(addr))
 587                         key->key_type = KEY_WEP_DEFAULT;
 588                 else
 589                         key->key_type = KEY_WEP_ADDR;
 590
 591                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 592                 break;
 593         case ALG_TKIP:
 594                 if (is_broadcast_ether_addr(addr))
 595                         key->key_type = KEY_TKIP_MIC_GROUP;
 596                 else
 597                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 598
 599                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 600                 break;
 601         case ALG_CCMP:
 602                 if (is_broadcast_ether_addr(addr))
 603                         key->key_type = KEY_AES_GROUP;
 604                 else
 605                         key->key_type = KEY_AES_PAIRWISE;
 606                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 607                 break;
 608         default:
 609                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 610                 return -EOPNOTSUPP;
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 617                              struct ieee80211_vif *vif,
 618                              struct ieee80211_sta *sta,
 619                              struct ieee80211_key_conf *key)
 620 {
 621         struct wl1251 *wl = hw->priv;
 622         struct wl1251_cmd_set_keys *wl_cmd;
 623         const u8 *addr;
 624         int ret;
 625
 626         static const u8 bcast_addr[ETH_ALEN] =
 627                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 628
 629         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 630
 631         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 632         if (!wl_cmd) {
 633                 ret = -ENOMEM;
 634                 goto out;
 635         }
 636
 637         addr = sta ? sta->addr : bcast_addr;
 638
 639         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 640         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 641         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 642                      key->alg, key->keyidx, key->keylen, key->flags);
 643         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 644
 645         if (is_zero_ether_addr(addr)) {
 646                 /* We dont support TX only encryption */
 647                 ret = -EOPNOTSUPP;
 648                 goto out;
 649         }
 650
 651         mutex_lock(&wl->mutex);
 652
 653         ret = wl1251_ps_elp_wakeup(wl);
 654         if (ret < 0)
 655                 goto out_unlock;
 656
 657         switch (cmd) {
 658         case SET_KEY:
 659                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 660                 break;
 661         case DISABLE_KEY:
 662                 wl_cmd->key_action = KEY_REMOVE;
 663                 break;
 664         default:
 665                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 666                 break;
 667         }
 668
 669         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 670         if (ret < 0) {
 671                 wl1251_error("Set KEY type failed");
 672                 goto out_sleep;
 673         }
 674
 675         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 676                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 677
 678         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 679             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 680                 /*
 681                  * We get the key in the following form:
 682                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 683                  * but the target is expecting:
 684                  * TKIP - RX MIC - TX MIC
 685                  */
 686                 memcpy(wl_cmd->key, key->key, 16);
 687                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 688                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 689
 690         } else {
 691                 memcpy(wl_cmd->key, key->key, key->keylen);
 692         }
 693         wl_cmd->key_size = key->keylen;
 694
 695         wl_cmd->id = key->keyidx;
 696         wl_cmd->ssid_profile = 0;
 697
 698         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 699
 700         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 701         if (ret < 0) {
 702                 wl1251_warning("could not set keys");
 703                 goto out_sleep;
 704         }
 705
 706 out_sleep:
 707         wl1251_ps_elp_sleep(wl);
 708
 709 out_unlock:
 710         mutex_unlock(&wl->mutex);
 711
 712 out:
 713         kfree(wl_cmd);
 714
 715         return ret;
 716 }
 717
 718 static int wl1251_build_basic_rates(char *rates)
 719 {
 720         u8 index = 0;
 721
 722         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 723         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 724         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 725         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 726
 727         return index;
 728 }
 729
 730 static int wl1251_build_extended_rates(char *rates)
 731 {
 732         u8 index = 0;
 733
 734         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 735         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 736         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 737         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 738         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 739         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 740         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 741         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 742
 743         return index;
 744 }
 745
 746
 747 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 748 {
 749         struct wl12xx_probe_req_template template;
 750         struct wl12xx_ie_rates *rates;
 751         char *ptr;
 752         u16 size;
 753
 754         ptr = (char *)&template;
 755         size = sizeof(struct ieee80211_header);
 756
 757         memset(template.header.da, 0xff, ETH_ALEN);
 758         memset(template.header.bssid, 0xff, ETH_ALEN);
 759         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 760         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 761
 762         /* IEs */
 763         /* SSID */
 764         template.ssid.header.id = WLAN_EID_SSID;
 765         template.ssid.header.len = ssid_len;
 766         if (ssid_len && ssid)
 767                 memcpy(template.ssid.ssid, ssid, ssid_len);
 768         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 769         ptr += size;
 770
 771         /* Basic Rates */
 772         rates = (struct wl12xx_ie_rates *)ptr;
 773         rates->header.id = WLAN_EID_SUPP_RATES;
 774         rates->header.len = wl1251_build_basic_rates(rates->rates);
 775         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 776         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 777
 778         /* Extended rates */
 779         rates = (struct wl12xx_ie_rates *)ptr;
 780         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 781         rates->header.len = wl1251_build_extended_rates(rates->rates);
 782         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 783
 784         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 785
 786         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 787                                       size);
 788 }
 789
 790 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
 791                           u8 active_scan, u8 high_prio, u8 num_channels,
 792                           u8 probe_requests)
 793 {
 794         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
 795         struct cmd_scan *params = NULL;
 796         int i, ret;
 797         u16 scan_options = 0;
 798
 799         if (wl->scanning)
 800                 return -EINVAL;
 801
 802         params = kzalloc(sizeof(*params), GFP_KERNEL);
 803         if (!params)
 804                 return -ENOMEM;
 805
 806         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 807         params->params.rx_filter_options =
 808                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 809
 810         /* High priority scan */
 811         if (!active_scan)
 812                 scan_options |= SCAN_PASSIVE;
 813         if (high_prio)
 814                 scan_options |= SCAN_PRIORITY_HIGH;
 815         params->params.scan_options = scan_options;
 816
 817         params->params.num_channels = num_channels;
 818         params->params.num_probe_requests = probe_requests;
 819         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 820         params->params.tid_trigger = 0;
 821
 822         for (i = 0; i < num_channels; i++) {
 823                 params->channels[i].min_duration = cpu_to_le32(30000);
 824                 params->channels[i].max_duration = cpu_to_le32(60000);
 825                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 826                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 827                 params->channels[i].early_termination = 0;
 828                 params->channels[i].tx_power_att = 0;
 829                 params->channels[i].channel = i + 1;
 830                 memset(params->channels[i].pad, 0, 3);
 831         }
 832
 833         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 834                 memset(&params->channels[i], 0,
 835                        sizeof(struct basic_scan_channel_parameters));
 836
 837         if (len && ssid) {
 838                 params->params.ssid_len = len;
 839                 memcpy(params->params.ssid, ssid, len);
 840         } else {
 841                 params->params.ssid_len = 0;
 842                 memset(params->params.ssid, 0, 32);
 843         }
 844
 845         ret = wl1251_build_probe_req(wl, ssid, len);
 846         if (ret < 0) {
 847                 wl1251_error("PROBE request template failed");
 848                 goto out;
 849         }
 850
 851         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 852         if (!trigger)
 853                 goto out;
 854
 855         trigger->timeout = 0;
 856
 857         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 858                               sizeof(*trigger));
 859         if (ret < 0) {
 860                 wl1251_error("trigger scan to failed for hw scan");
 861                 goto out;
 862         }
 863
 864         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 865
 866         wl->scanning = true;
 867
 868         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 869         if (ret < 0)
 870                 wl1251_error("SCAN failed");
 871
 872         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
 873
 874         if (params->header.status != CMD_STATUS_SUCCESS) {
 875                 wl1251_error("TEST command answer error: %d",
 876                              params->header.status);
 877                 wl->scanning = false;
 878                 ret = -EIO;
 879                 goto out;
 880         }
 881
 882 out:
 883         kfree(params);
 884         return ret;
 885
 886 }
 887
 888 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 889                              struct cfg80211_scan_request *req)
 890 {
 891         struct wl1251 *wl = hw->priv;
 892         int ret;
 893         u8 *ssid = NULL;
 894         size_t ssid_len = 0;
 895
 896         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 897
 898         if (req->n_ssids) {
 899                 ssid = req->ssids[0].ssid;
 900                 ssid_len = req->ssids[0].ssid_len;
 901         }
 902
 903         mutex_lock(&wl->mutex);
 904
 905         ret = wl1251_ps_elp_wakeup(wl);
 906         if (ret < 0)
 907                 goto out;
 908
 909         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 910
 911         wl1251_ps_elp_sleep(wl);
 912
 913 out:
 914         mutex_unlock(&wl->mutex);
 915
 916         return ret;
 917 }
 918
 919 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 920 {
 921         struct wl1251 *wl = hw->priv;
 922         int ret;
 923
 924         mutex_lock(&wl->mutex);
 925
 926         ret = wl1251_ps_elp_wakeup(wl);
 927         if (ret < 0)
 928                 goto out;
 929
 930         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 931         if (ret < 0)
 932                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 933
 934         wl1251_ps_elp_sleep(wl);
 935
 936 out:
 937         mutex_unlock(&wl->mutex);
 938
 939         return ret;
 940 }
 941
 942 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 943                                        struct ieee80211_vif *vif,
 944                                        struct ieee80211_bss_conf *bss_conf,
 945                                        u32 changed)
 946 {
 947         enum wl1251_cmd_ps_mode mode;
 948         struct wl1251 *wl = hw->priv;
 949         struct sk_buff *beacon;
 950         int ret;
 951
 952         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 953
 954         mutex_lock(&wl->mutex);
 955
 956         ret = wl1251_ps_elp_wakeup(wl);
 957         if (ret < 0)
 958                 goto out;
 959
 960         if (changed & BSS_CHANGED_ASSOC) {
 961                 if (bss_conf->assoc) {
 962                         wl->aid = bss_conf->aid;
 963
 964                         ret = wl1251_build_ps_poll(wl, wl->aid);
 965                         if (ret < 0)
 966                                 goto out_sleep;
 967
 968                         ret = wl1251_acx_aid(wl, wl->aid);
 969                         if (ret < 0)
 970                                 goto out_sleep;
 971
 972                         /* If we want to go in PSM but we're not there yet */
 973                         if (wl->psm_requested && !wl->psm) {
 974                                 mode = STATION_POWER_SAVE_MODE;
 975                                 ret = wl1251_ps_set_mode(wl, mode);
 976                                 if (ret < 0)
 977                                         goto out_sleep;
 978                         }
 979                 }
 980         }
 981         if (changed & BSS_CHANGED_ERP_SLOT) {
 982                 if (bss_conf->use_short_slot)
 983                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
 984                 else
 985                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
 986                 if (ret < 0) {
 987                         wl1251_warning("Set slot time failed %d", ret);
 988                         goto out_sleep;
 989                 }
 990         }
 991
 992         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 993                 if (bss_conf->use_short_preamble)
 994                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
 995                 else
 996                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
 997         }
 998
 999         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1000                 if (bss_conf->use_cts_prot)
1001                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1002                 else
1003                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1004                 if (ret < 0) {
1005                         wl1251_warning("Set ctsprotect failed %d", ret);
1006                         goto out;
1007                 }
1008         }
1009
1010         if (changed & BSS_CHANGED_BSSID) {
1011                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1012
1013                 ret = wl1251_build_null_data(wl);
1014                 if (ret < 0)
1015                         goto out;
1016
1017                 if (wl->bss_type != BSS_TYPE_IBSS) {
1018                         ret = wl1251_cmd_join(wl, wl->bss_type, 5, 100, 1);
1019                         if (ret < 0)
1020                                 goto out_sleep;
1021                         wl1251_warning("Set ctsprotect failed %d", ret);
1022                         goto out_sleep;
1023                 }
1024         }
1025
1026         if (changed & BSS_CHANGED_BEACON) {
1027                 beacon = ieee80211_beacon_get(hw, vif);
1028                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1029                                               beacon->len);
1030
1031                 if (ret < 0) {
1032                         dev_kfree_skb(beacon);
1033                         goto out;
1034                 }
1035
1036                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1037                                               beacon->len);
1038
1039                 dev_kfree_skb(beacon);
1040
1041                 if (ret < 0)
1042                         goto out;
1043
1044                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
1045
1046                 if (ret < 0)
1047                         goto out;
1048         }
1049
1050 out_sleep:
1051         wl1251_ps_elp_sleep(wl);
1052
1053 out:
1054         mutex_unlock(&wl->mutex);
1055 }
1056
1057
1058 /* can't be const, mac80211 writes to this */
1059 static struct ieee80211_rate wl1251_rates[] = {
1060         { .bitrate = 10,
1061           .hw_value = 0x1,
1062           .hw_value_short = 0x1, },
1063         { .bitrate = 20,
1064           .hw_value = 0x2,
1065           .hw_value_short = 0x2,
1066           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1067         { .bitrate = 55,
1068           .hw_value = 0x4,
1069           .hw_value_short = 0x4,
1070           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1071         { .bitrate = 110,
1072           .hw_value = 0x20,
1073           .hw_value_short = 0x20,
1074           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1075         { .bitrate = 60,
1076           .hw_value = 0x8,
1077           .hw_value_short = 0x8, },
1078         { .bitrate = 90,
1079           .hw_value = 0x10,
1080           .hw_value_short = 0x10, },
1081         { .bitrate = 120,
1082           .hw_value = 0x40,
1083           .hw_value_short = 0x40, },
1084         { .bitrate = 180,
1085           .hw_value = 0x80,
1086           .hw_value_short = 0x80, },
1087         { .bitrate = 240,
1088           .hw_value = 0x200,
1089           .hw_value_short = 0x200, },
1090         { .bitrate = 360,
1091          .hw_value = 0x400,
1092          .hw_value_short = 0x400, },
1093         { .bitrate = 480,
1094           .hw_value = 0x800,
1095           .hw_value_short = 0x800, },
1096         { .bitrate = 540,
1097           .hw_value = 0x1000,
1098           .hw_value_short = 0x1000, },
1099 };
1100
1101 /* can't be const, mac80211 writes to this */
1102 static struct ieee80211_channel wl1251_channels[] = {
1103         { .hw_value = 1, .center_freq = 2412},
1104         { .hw_value = 2, .center_freq = 2417},
1105         { .hw_value = 3, .center_freq = 2422},
1106         { .hw_value = 4, .center_freq = 2427},
1107         { .hw_value = 5, .center_freq = 2432},
1108         { .hw_value = 6, .center_freq = 2437},
1109         { .hw_value = 7, .center_freq = 2442},
1110         { .hw_value = 8, .center_freq = 2447},
1111         { .hw_value = 9, .center_freq = 2452},
1112         { .hw_value = 10, .center_freq = 2457},
1113         { .hw_value = 11, .center_freq = 2462},
1114         { .hw_value = 12, .center_freq = 2467},
1115         { .hw_value = 13, .center_freq = 2472},
1116 };
1117
1118 /* can't be const, mac80211 writes to this */
1119 static struct ieee80211_supported_band wl1251_band_2ghz = {
1120         .channels = wl1251_channels,
1121         .n_channels = ARRAY_SIZE(wl1251_channels),
1122         .bitrates = wl1251_rates,
1123         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1124 };
1125
1126 static const struct ieee80211_ops wl1251_ops = {
1127         .start = wl1251_op_start,
1128         .stop = wl1251_op_stop,
1129         .add_interface = wl1251_op_add_interface,
1130         .remove_interface = wl1251_op_remove_interface,
1131         .config = wl1251_op_config,
1132         .configure_filter = wl1251_op_configure_filter,
1133         .tx = wl1251_op_tx,
1134         .set_key = wl1251_op_set_key,
1135         .hw_scan = wl1251_op_hw_scan,
1136         .bss_info_changed = wl1251_op_bss_info_changed,
1137         .set_rts_threshold = wl1251_op_set_rts_threshold,
1138 };
1139
1140 static int wl1251_register_hw(struct wl1251 *wl)
1141 {
1142         int ret;
1143
1144         if (wl->mac80211_registered)
1145                 return 0;
1146
1147         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1148
1149         ret = ieee80211_register_hw(wl->hw);
1150         if (ret < 0) {
1151                 wl1251_error("unable to register mac80211 hw: %d", ret);
1152                 return ret;
1153         }
1154
1155         wl->mac80211_registered = true;
1156
1157         wl1251_notice("loaded");
1158
1159         return 0;
1160 }
1161
1162 int wl1251_init_ieee80211(struct wl1251 *wl)
1163 {
1164         int ret;
1165
1166         /* The tx descriptor buffer and the TKIP space */
1167         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1168                 + WL1251_TKIP_IV_SPACE;
1169
1170         /* unit us */
1171         /* FIXME: find a proper value */
1172         wl->hw->channel_change_time = 10000;
1173
1174         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1175                 IEEE80211_HW_NOISE_DBM;
1176
1177         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1178         wl->hw->wiphy->max_scan_ssids = 1;
1179         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1180
1181         ret = wl1251_register_hw(wl);
1182         if (ret)
1183                 goto out;
1184
1185         wl1251_debugfs_init(wl);
1186         wl1251_notice("initialized");
1187
1188         ret = 0;
1189
1190 out:
1191         return ret;
1192 }
1193 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1194
1195 #define WL1251_DEFAULT_CHANNEL 1
1196 struct ieee80211_hw *wl1251_alloc_hw(void)
1197 {
1198         struct ieee80211_hw *hw;
1199         struct wl1251 *wl;
1200         int i;
1201         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1202
1203         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1204         if (!hw) {
1205                 wl1251_error("could not alloc ieee80211_hw");
1206                 return ERR_PTR(-ENOMEM);
1207         }
1208
1209         wl = hw->priv;
1210         memset(wl, 0, sizeof(*wl));
1211
1212         wl->hw = hw;
1213
1214         wl->data_in_count = 0;
1215
1216         skb_queue_head_init(&wl->tx_queue);
1217
1218         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1219         wl->channel = WL1251_DEFAULT_CHANNEL;
1220         wl->scanning = false;
1221         wl->default_key = 0;
1222         wl->listen_int = 1;
1223         wl->rx_counter = 0;
1224         wl->rx_handled = 0;
1225         wl->rx_current_buffer = 0;
1226         wl->rx_last_id = 0;
1227         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1228         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1229         wl->elp = false;
1230         wl->psm = 0;
1231         wl->psm_requested = false;
1232         wl->tx_queue_stopped = false;
1233         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1234
1235         /* We use the default power on sleep time until we know which chip
1236          * we're using */
1237         wl->chip.power_on_sleep = WL1251_DEFAULT_POWER_ON_SLEEP;
1238
1239         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1240                 wl->tx_frames[i] = NULL;
1241
1242         wl->next_tx_complete = 0;
1243
1244         /*
1245          * In case our MAC address is not correctly set,
1246          * we use a random but Nokia MAC.
1247          */
1248         memcpy(wl->mac_addr, nokia_oui, 3);
1249         get_random_bytes(wl->mac_addr + 3, 3);
1250
1251         wl->state = WL1251_STATE_OFF;
1252         mutex_init(&wl->mutex);
1253
1254         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1255         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1256
1257         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1258         if (!wl->rx_descriptor) {
1259                 wl1251_error("could not allocate memory for rx descriptor");
1260                 ieee80211_free_hw(hw);
1261                 return ERR_PTR(-ENOMEM);
1262         }
1263
1264         return hw;
1265 }
1266 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1267
1268 int wl1251_free_hw(struct wl1251 *wl)
1269 {
1270         ieee80211_unregister_hw(wl->hw);
1271
1272         wl1251_debugfs_exit(wl);
1273
1274         kfree(wl->target_mem_map);
1275         kfree(wl->data_path);
1276         kfree(wl->fw);
1277         wl->fw = NULL;
1278         kfree(wl->nvs);
1279         wl->nvs = NULL;
1280
1281         kfree(wl->rx_descriptor);
1282         wl->rx_descriptor = NULL;
1283
1284         ieee80211_free_hw(wl->hw);
1285
1286         return 0;
1287 }
1288 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1289
1290 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1291 MODULE_LICENSE("GPL");
1292 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1293 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");