drivers/net/wireless/ti/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = reject_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = reject_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs = kmemdup(fw->data, fw->size, 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         wl->nvs_len = fw->size;
 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_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 149         elp_reg = wl1251_read_elp(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;
 158
 159         ret = wl1251_power_on(wl);
 160         if (ret < 0)
 161                 return ret;
 162
 163         msleep(WL1251_POWER_ON_SLEEP);
 164         wl->if_ops->reset(wl);
 165
 166         /* We don't need a real memory partition here, because we only want
 167          * to use the registers at this point. */
 168         wl1251_set_partition(wl,
 169                              0x00000000,
 170                              0x00000000,
 171                              REGISTERS_BASE,
 172                              REGISTERS_DOWN_SIZE);
 173
 174         /* ELP module wake up */
 175         wl1251_fw_wakeup(wl);
 176
 177         /* whal_FwCtrl_BootSm() */
 178
 179         /* 0. read chip id from CHIP_ID */
 180         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 181
 182         /* 1. check if chip id is valid */
 183
 184         switch (wl->chip_id) {
 185         case CHIP_ID_1251_PG12:
 186                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 187                              wl->chip_id);
 188                 break;
 189         case CHIP_ID_1251_PG11:
 190                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 191                              wl->chip_id);
 192                 break;
 193         case CHIP_ID_1251_PG10:
 194         default:
 195                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 196                 ret = -ENODEV;
 197                 goto out;
 198         }
 199
 200         if (wl->fw == NULL) {
 201                 ret = wl1251_fetch_firmware(wl);
 202                 if (ret < 0)
 203                         goto out;
 204         }
 205
 206 out:
 207         return ret;
 208 }
 209
 210 #define WL1251_IRQ_LOOP_COUNT 10
 211 static void wl1251_irq_work(struct work_struct *work)
 212 {
 213         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 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         do {
 235                 if (wl->data_path) {
 236                         wl->rx_counter = wl1251_mem_read32(
 237                                 wl, wl->data_path->rx_control_addr);
 238
 239                         /* We handle a frmware bug here */
 240                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 241                         case 0:
 242                                 wl1251_debug(DEBUG_IRQ,
 243                                              "RX: FW and host in sync");
 244                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 245                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 246                                 break;
 247                         case 1:
 248                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 249                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 2:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         default:
 258                                 wl1251_warning(
 259                                         "RX: FW and host out of sync: %d",
 260                                         wl->rx_counter - wl->rx_handled);
 261                                 break;
 262                         }
 263
 264                         wl->rx_handled = wl->rx_counter;
 265
 266                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 267                                      wl->rx_counter);
 268                 }
 269
 270                 intr &= wl->intr_mask;
 271
 272                 if (intr == 0) {
 273                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 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) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 294                         wl1251_event_handle(wl, 0);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 299                         wl1251_event_handle(wl, 1);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 303                         wl1251_debug(DEBUG_IRQ,
 304                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 305
 306                 if (--ctr == 0)
 307                         break;
 308
 309                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 310         } while (intr);
 311
 312 out_sleep:
 313         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 314         wl1251_ps_elp_sleep(wl);
 315
 316 out:
 317         mutex_unlock(&wl->mutex);
 318 }
 319
 320 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 321                        u16 beacon_interval, u8 dtim_period)
 322 {
 323         int ret;
 324
 325         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 326                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 327                                      wl->tx_mgmt_frm_rate,
 328                                      wl->tx_mgmt_frm_mod);
 329         if (ret < 0)
 330                 goto out;
 331
 332         /*
 333          * Join command applies filters, and if we are not associated,
 334          * BSSID filter must be disabled for association to work.
 335          */
 336         if (is_zero_ether_addr(wl->bssid))
 337                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 338
 339         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 340                               dtim_period);
 341         if (ret < 0)
 342                 goto out;
 343
 344         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 345         if (ret < 0)
 346                 wl1251_warning("join timeout");
 347
 348 out:
 349         return ret;
 350 }
 351
 352 static void wl1251_op_tx(struct ieee80211_hw *hw,
 353                          struct ieee80211_tx_control *control,
 354                          struct sk_buff *skb)
 355 {
 356         struct wl1251 *wl = hw->priv;
 357         unsigned long flags;
 358
 359         skb_queue_tail(&wl->tx_queue, skb);
 360
 361         /*
 362          * The chip specific setup must run before the first TX packet -
 363          * before that, the tx_work will not be initialized!
 364          */
 365
 366         ieee80211_queue_work(wl->hw, &wl->tx_work);
 367
 368         /*
 369          * The workqueue is slow to process the tx_queue and we need stop
 370          * the queue here, otherwise the queue will get too long.
 371          */
 372         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 373                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 374
 375                 spin_lock_irqsave(&wl->wl_lock, flags);
 376                 ieee80211_stop_queues(wl->hw);
 377                 wl->tx_queue_stopped = true;
 378                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 379         }
 380 }
 381
 382 static int wl1251_op_start(struct ieee80211_hw *hw)
 383 {
 384         struct wl1251 *wl = hw->priv;
 385         struct wiphy *wiphy = hw->wiphy;
 386         int ret = 0;
 387
 388         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 389
 390         mutex_lock(&wl->mutex);
 391
 392         if (wl->state != WL1251_STATE_OFF) {
 393                 wl1251_error("cannot start because not in off state: %d",
 394                              wl->state);
 395                 ret = -EBUSY;
 396                 goto out;
 397         }
 398
 399         ret = wl1251_chip_wakeup(wl);
 400         if (ret < 0)
 401                 goto out;
 402
 403         ret = wl1251_boot(wl);
 404         if (ret < 0)
 405                 goto out;
 406
 407         ret = wl1251_hw_init(wl);
 408         if (ret < 0)
 409                 goto out;
 410
 411         ret = wl1251_acx_station_id(wl);
 412         if (ret < 0)
 413                 goto out;
 414
 415         wl->state = WL1251_STATE_ON;
 416
 417         wl1251_info("firmware booted (%s)", wl->fw_ver);
 418
 419         /* update hw/fw version info in wiphy struct */
 420         wiphy->hw_version = wl->chip_id;
 421         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 422
 423 out:
 424         if (ret < 0)
 425                 wl1251_power_off(wl);
 426
 427         mutex_unlock(&wl->mutex);
 428
 429         return ret;
 430 }
 431
 432 static void wl1251_op_stop(struct ieee80211_hw *hw)
 433 {
 434         struct wl1251 *wl = hw->priv;
 435
 436         wl1251_info("down");
 437
 438         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 439
 440         mutex_lock(&wl->mutex);
 441
 442         WARN_ON(wl->state != WL1251_STATE_ON);
 443
 444         if (wl->scanning) {
 445                 struct cfg80211_scan_info info = {
 446                         .aborted = true,
 447                 };
 448
 449                 ieee80211_scan_completed(wl->hw, &info);
 450                 wl->scanning = false;
 451         }
 452
 453         wl->state = WL1251_STATE_OFF;
 454
 455         wl1251_disable_interrupts(wl);
 456
 457         mutex_unlock(&wl->mutex);
 458
 459         cancel_work_sync(&wl->irq_work);
 460         cancel_work_sync(&wl->tx_work);
 461         cancel_delayed_work_sync(&wl->elp_work);
 462
 463         mutex_lock(&wl->mutex);
 464
 465         /* let's notify MAC80211 about the remaining pending TX frames */
 466         wl1251_tx_flush(wl);
 467         wl1251_power_off(wl);
 468
 469         eth_zero_addr(wl->bssid);
 470         wl->listen_int = 1;
 471         wl->bss_type = MAX_BSS_TYPE;
 472
 473         wl->data_in_count = 0;
 474         wl->rx_counter = 0;
 475         wl->rx_handled = 0;
 476         wl->rx_current_buffer = 0;
 477         wl->rx_last_id = 0;
 478         wl->next_tx_complete = 0;
 479         wl->elp = false;
 480         wl->station_mode = STATION_ACTIVE_MODE;
 481         wl->psm_entry_retry = 0;
 482         wl->tx_queue_stopped = false;
 483         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 484         wl->rssi_thold = 0;
 485         wl->channel = WL1251_DEFAULT_CHANNEL;
 486         wl->monitor_present = false;
 487         wl->joined = false;
 488
 489         wl1251_debugfs_reset(wl);
 490
 491         mutex_unlock(&wl->mutex);
 492 }
 493
 494 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 495                                    struct ieee80211_vif *vif)
 496 {
 497         struct wl1251 *wl = hw->priv;
 498         int ret = 0;
 499
 500         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 501                              IEEE80211_VIF_SUPPORTS_UAPSD |
 502                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 503
 504         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 505                      vif->type, vif->addr);
 506
 507         mutex_lock(&wl->mutex);
 508         if (wl->vif) {
 509                 ret = -EBUSY;
 510                 goto out;
 511         }
 512
 513         wl->vif = vif;
 514
 515         switch (vif->type) {
 516         case NL80211_IFTYPE_STATION:
 517                 wl->bss_type = BSS_TYPE_STA_BSS;
 518                 break;
 519         case NL80211_IFTYPE_ADHOC:
 520                 wl->bss_type = BSS_TYPE_IBSS;
 521                 break;
 522         default:
 523                 ret = -EOPNOTSUPP;
 524                 goto out;
 525         }
 526
 527         if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
 528                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 529                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 530                 ret = wl1251_acx_station_id(wl);
 531                 if (ret < 0)
 532                         goto out;
 533         }
 534
 535 out:
 536         mutex_unlock(&wl->mutex);
 537         return ret;
 538 }
 539
 540 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 541                                          struct ieee80211_vif *vif)
 542 {
 543         struct wl1251 *wl = hw->priv;
 544
 545         mutex_lock(&wl->mutex);
 546         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 547         wl->vif = NULL;
 548         eth_zero_addr(wl->bssid);
 549         mutex_unlock(&wl->mutex);
 550 }
 551
 552 static int wl1251_build_null_data(struct wl1251 *wl)
 553 {
 554         struct sk_buff *skb = NULL;
 555         int size;
 556         void *ptr;
 557         int ret = -ENOMEM;
 558
 559         if (wl->bss_type == BSS_TYPE_IBSS) {
 560                 size = sizeof(struct wl12xx_null_data_template);
 561                 ptr = NULL;
 562         } else {
 563                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif, false);
 564                 if (!skb)
 565                         goto out;
 566                 size = skb->len;
 567                 ptr = skb->data;
 568         }
 569
 570         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 571
 572 out:
 573         dev_kfree_skb(skb);
 574         if (ret)
 575                 wl1251_warning("cmd buld null data failed: %d", ret);
 576
 577         return ret;
 578 }
 579
 580 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 581 {
 582         struct ieee80211_qos_hdr template;
 583
 584         memset(&template, 0, sizeof(template));
 585
 586         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 587         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 588         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 589
 590         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 591                                              IEEE80211_STYPE_QOS_NULLFUNC |
 592                                              IEEE80211_FCTL_TODS);
 593
 594         /* FIXME: not sure what priority to use here */
 595         template.qos_ctrl = cpu_to_le16(0);
 596
 597         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 598                                        sizeof(template));
 599 }
 600
 601 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 602 {
 603         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 604 }
 605
 606 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 607 {
 608         struct wl1251 *wl = hw->priv;
 609         struct ieee80211_conf *conf = &hw->conf;
 610         int channel, ret = 0;
 611
 612         channel = ieee80211_frequency_to_channel(
 613                         conf->chandef.chan->center_freq);
 614
 615         wl1251_debug(DEBUG_MAC80211,
 616                      "mac80211 config ch %d monitor %s psm %s power %d",
 617                      channel,
 618                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 619                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 620                      conf->power_level);
 621
 622         mutex_lock(&wl->mutex);
 623
 624         ret = wl1251_ps_elp_wakeup(wl);
 625         if (ret < 0)
 626                 goto out;
 627
 628         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 629                 u32 mode;
 630
 631                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 632                         wl->monitor_present = true;
 633                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 634                 } else {
 635                         wl->monitor_present = false;
 636                         mode = 0;
 637                 }
 638
 639                 ret = wl1251_acx_feature_cfg(wl, mode);
 640                 if (ret < 0)
 641                         goto out_sleep;
 642         }
 643
 644         if (channel != wl->channel) {
 645                 wl->channel = channel;
 646
 647                 /*
 648                  * Use ENABLE_RX command for channel switching when no
 649                  * interface is present (monitor mode only).
 650                  * This leaves the tx path disabled in firmware, whereas
 651                  * the usual JOIN command seems to transmit some frames
 652                  * at firmware level.
 653                  */
 654                 if (wl->vif == NULL) {
 655                         wl->joined = false;
 656                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 657                 } else {
 658                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 659                                           wl->beacon_int, wl->dtim_period);
 660                 }
 661                 if (ret < 0)
 662                         goto out_sleep;
 663         }
 664
 665         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 666                 wl1251_debug(DEBUG_PSM, "psm enabled");
 667
 668                 wl->psm_requested = true;
 669
 670                 wl->dtim_period = conf->ps_dtim_period;
 671
 672                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 673                                                   wl->dtim_period);
 674
 675                 /*
 676                  * mac80211 enables PSM only if we're already associated.
 677                  */
 678                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 679                 if (ret < 0)
 680                         goto out_sleep;
 681         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 682                 wl1251_debug(DEBUG_PSM, "psm disabled");
 683
 684                 wl->psm_requested = false;
 685
 686                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 687                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 688                         if (ret < 0)
 689                                 goto out_sleep;
 690                 }
 691         }
 692
 693         if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 694                 if (conf->flags & IEEE80211_CONF_IDLE) {
 695                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 696                         if (ret < 0)
 697                                 goto out_sleep;
 698                 } else {
 699                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 700                         if (ret < 0)
 701                                 goto out_sleep;
 702                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 703                                           wl->beacon_int, wl->dtim_period);
 704                         if (ret < 0)
 705                                 goto out_sleep;
 706                 }
 707         }
 708
 709         if (conf->power_level != wl->power_level) {
 710                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 711                 if (ret < 0)
 712                         goto out_sleep;
 713
 714                 wl->power_level = conf->power_level;
 715         }
 716
 717 out_sleep:
 718         wl1251_ps_elp_sleep(wl);
 719
 720 out:
 721         mutex_unlock(&wl->mutex);
 722
 723         return ret;
 724 }
 725
 726 struct wl1251_filter_params {
 727         bool enabled;
 728         int mc_list_length;
 729         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 730 };
 731
 732 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 733                                        struct netdev_hw_addr_list *mc_list)
 734 {
 735         struct wl1251_filter_params *fp;
 736         struct netdev_hw_addr *ha;
 737         struct wl1251 *wl = hw->priv;
 738
 739         if (unlikely(wl->state == WL1251_STATE_OFF))
 740                 return 0;
 741
 742         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 743         if (!fp) {
 744                 wl1251_error("Out of memory setting filters.");
 745                 return 0;
 746         }
 747
 748         /* update multicast filtering parameters */
 749         fp->mc_list_length = 0;
 750         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 751                 fp->enabled = false;
 752         } else {
 753                 fp->enabled = true;
 754                 netdev_hw_addr_list_for_each(ha, mc_list) {
 755                         memcpy(fp->mc_list[fp->mc_list_length],
 756                                         ha->addr, ETH_ALEN);
 757                         fp->mc_list_length++;
 758                 }
 759         }
 760
 761         return (u64)(unsigned long)fp;
 762 }
 763
 764 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
 765                                   FIF_FCSFAIL | \
 766                                   FIF_BCN_PRBRESP_PROMISC | \
 767                                   FIF_CONTROL | \
 768                                   FIF_OTHER_BSS | \
 769                                   FIF_PROBE_REQ)
 770
 771 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 772                                        unsigned int changed,
 773                                        unsigned int *total, u64 multicast)
 774 {
 775         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 776         struct wl1251 *wl = hw->priv;
 777         int ret;
 778
 779         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 780
 781         *total &= WL1251_SUPPORTED_FILTERS;
 782         changed &= WL1251_SUPPORTED_FILTERS;
 783
 784         if (changed == 0) {
 785                 /* no filters which we support changed */
 786                 kfree(fp);
 787                 return;
 788         }
 789
 790         mutex_lock(&wl->mutex);
 791
 792         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 793         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 794
 795         if (*total & FIF_ALLMULTI)
 796                 /*
 797                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 798                  * all multicast frames
 799                  */
 800                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 801         if (*total & FIF_FCSFAIL)
 802                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 803         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 804                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 805                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 806         }
 807         if (*total & FIF_CONTROL)
 808                 wl->rx_filter |= CFG_RX_CTL_EN;
 809         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 810                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 811         if (*total & FIF_PROBE_REQ)
 812                 wl->rx_filter |= CFG_RX_PREQ_EN;
 813
 814         if (wl->state == WL1251_STATE_OFF)
 815                 goto out;
 816
 817         ret = wl1251_ps_elp_wakeup(wl);
 818         if (ret < 0)
 819                 goto out;
 820
 821         if (*total & FIF_ALLMULTI)
 822                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 823         else if (fp)
 824                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 825                                                    fp->mc_list,
 826                                                    fp->mc_list_length);
 827         if (ret < 0)
 828                 goto out;
 829
 830         /* send filters to firmware */
 831         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 832
 833         wl1251_ps_elp_sleep(wl);
 834
 835 out:
 836         mutex_unlock(&wl->mutex);
 837         kfree(fp);
 838 }
 839
 840 /* HW encryption */
 841 static int wl1251_set_key_type(struct wl1251 *wl,
 842                                struct wl1251_cmd_set_keys *key,
 843                                enum set_key_cmd cmd,
 844                                struct ieee80211_key_conf *mac80211_key,
 845                                const u8 *addr)
 846 {
 847         switch (mac80211_key->cipher) {
 848         case WLAN_CIPHER_SUITE_WEP40:
 849         case WLAN_CIPHER_SUITE_WEP104:
 850                 if (is_broadcast_ether_addr(addr))
 851                         key->key_type = KEY_WEP_DEFAULT;
 852                 else
 853                         key->key_type = KEY_WEP_ADDR;
 854
 855                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 856                 break;
 857         case WLAN_CIPHER_SUITE_TKIP:
 858                 if (is_broadcast_ether_addr(addr))
 859                         key->key_type = KEY_TKIP_MIC_GROUP;
 860                 else
 861                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 862
 863                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 864                 break;
 865         case WLAN_CIPHER_SUITE_CCMP:
 866                 if (is_broadcast_ether_addr(addr))
 867                         key->key_type = KEY_AES_GROUP;
 868                 else
 869                         key->key_type = KEY_AES_PAIRWISE;
 870                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 871                 break;
 872         default:
 873                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 874                 return -EOPNOTSUPP;
 875         }
 876
 877         return 0;
 878 }
 879
 880 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 881                              struct ieee80211_vif *vif,
 882                              struct ieee80211_sta *sta,
 883                              struct ieee80211_key_conf *key)
 884 {
 885         struct wl1251 *wl = hw->priv;
 886         struct wl1251_cmd_set_keys *wl_cmd;
 887         const u8 *addr;
 888         int ret;
 889
 890         static const u8 bcast_addr[ETH_ALEN] =
 891                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 892
 893         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 894
 895         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 896         if (!wl_cmd) {
 897                 ret = -ENOMEM;
 898                 goto out;
 899         }
 900
 901         addr = sta ? sta->addr : bcast_addr;
 902
 903         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 904         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 905         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 906                      key->cipher, key->keyidx, key->keylen, key->flags);
 907         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 908
 909         if (is_zero_ether_addr(addr)) {
 910                 /* We dont support TX only encryption */
 911                 ret = -EOPNOTSUPP;
 912                 goto out;
 913         }
 914
 915         mutex_lock(&wl->mutex);
 916
 917         switch (cmd) {
 918         case SET_KEY:
 919                 if (wl->monitor_present) {
 920                         ret = -EOPNOTSUPP;
 921                         goto out_unlock;
 922                 }
 923                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 924                 break;
 925         case DISABLE_KEY:
 926                 wl_cmd->key_action = KEY_REMOVE;
 927                 break;
 928         default:
 929                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 930                 break;
 931         }
 932
 933         ret = wl1251_ps_elp_wakeup(wl);
 934         if (ret < 0)
 935                 goto out_unlock;
 936
 937         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 938         if (ret < 0) {
 939                 wl1251_error("Set KEY type failed");
 940                 goto out_sleep;
 941         }
 942
 943         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 944                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 945
 946         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 947             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 948                 /*
 949                  * We get the key in the following form:
 950                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 951                  * but the target is expecting:
 952                  * TKIP - RX MIC - TX MIC
 953                  */
 954                 memcpy(wl_cmd->key, key->key, 16);
 955                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 956                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 957
 958         } else {
 959                 memcpy(wl_cmd->key, key->key, key->keylen);
 960         }
 961         wl_cmd->key_size = key->keylen;
 962
 963         wl_cmd->id = key->keyidx;
 964         wl_cmd->ssid_profile = 0;
 965
 966         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 967
 968         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 969         if (ret < 0) {
 970                 wl1251_warning("could not set keys");
 971                 goto out_sleep;
 972         }
 973
 974 out_sleep:
 975         wl1251_ps_elp_sleep(wl);
 976
 977 out_unlock:
 978         mutex_unlock(&wl->mutex);
 979
 980 out:
 981         kfree(wl_cmd);
 982
 983         return ret;
 984 }
 985
 986 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 987                              struct ieee80211_vif *vif,
 988                              struct ieee80211_scan_request *hw_req)
 989 {
 990         struct cfg80211_scan_request *req = &hw_req->req;
 991         struct wl1251 *wl = hw->priv;
 992         struct sk_buff *skb;
 993         size_t ssid_len = 0;
 994         u8 *ssid = NULL;
 995         int ret;
 996
 997         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 998
 999         if (req->n_ssids) {
1000                 ssid = req->ssids[0].ssid;
1001                 ssid_len = req->ssids[0].ssid_len;
1002         }
1003
1004         mutex_lock(&wl->mutex);
1005
1006         if (wl->scanning) {
1007                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1008                 ret = -EINVAL;
1009                 goto out;
1010         }
1011
1012         ret = wl1251_ps_elp_wakeup(wl);
1013         if (ret < 0)
1014                 goto out;
1015
1016         if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1017                 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1018                 if (ret < 0)
1019                         goto out_sleep;
1020                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1021                                   wl->beacon_int, wl->dtim_period);
1022                 if (ret < 0)
1023                         goto out_sleep;
1024         }
1025
1026         skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1027                                      req->ie_len);
1028         if (!skb) {
1029                 ret = -ENOMEM;
1030                 goto out_idle;
1031         }
1032         if (req->ie_len)
1033                 skb_put_data(skb, req->ie, req->ie_len);
1034
1035         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1036                                       skb->len);
1037         dev_kfree_skb(skb);
1038         if (ret < 0)
1039                 goto out_idle;
1040
1041         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1042         if (ret < 0)
1043                 goto out_idle;
1044
1045         wl->scanning = true;
1046
1047         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1048                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1049         if (ret < 0) {
1050                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1051                 wl->scanning = false;
1052                 goto out_idle;
1053         }
1054         goto out_sleep;
1055
1056 out_idle:
1057         if (hw->conf.flags & IEEE80211_CONF_IDLE)
1058                 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1059 out_sleep:
1060         wl1251_ps_elp_sleep(wl);
1061
1062 out:
1063         mutex_unlock(&wl->mutex);
1064
1065         return ret;
1066 }
1067
1068 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1069 {
1070         struct wl1251 *wl = hw->priv;
1071         int ret;
1072
1073         mutex_lock(&wl->mutex);
1074
1075         ret = wl1251_ps_elp_wakeup(wl);
1076         if (ret < 0)
1077                 goto out;
1078
1079         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1080         if (ret < 0)
1081                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1082
1083         wl1251_ps_elp_sleep(wl);
1084
1085 out:
1086         mutex_unlock(&wl->mutex);
1087
1088         return ret;
1089 }
1090
1091 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1092                                        struct ieee80211_vif *vif,
1093                                        struct ieee80211_bss_conf *bss_conf,
1094                                        u32 changed)
1095 {
1096         struct wl1251 *wl = hw->priv;
1097         struct sk_buff *beacon, *skb;
1098         bool enable;
1099         int ret;
1100
1101         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1102
1103         mutex_lock(&wl->mutex);
1104
1105         ret = wl1251_ps_elp_wakeup(wl);
1106         if (ret < 0)
1107                 goto out;
1108
1109         if (changed & BSS_CHANGED_CQM) {
1110                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1111                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1112                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1113                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1114                 if (ret < 0)
1115                         goto out;
1116                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1117         }
1118
1119         if ((changed & BSS_CHANGED_BSSID) &&
1120             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1121                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1122
1123                 if (!is_zero_ether_addr(wl->bssid)) {
1124                         ret = wl1251_build_null_data(wl);
1125                         if (ret < 0)
1126                                 goto out_sleep;
1127
1128                         ret = wl1251_build_qos_null_data(wl);
1129                         if (ret < 0)
1130                                 goto out_sleep;
1131
1132                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1133                                           wl->beacon_int, wl->dtim_period);
1134                         if (ret < 0)
1135                                 goto out_sleep;
1136                 }
1137         }
1138
1139         if (changed & BSS_CHANGED_ASSOC) {
1140                 if (bss_conf->assoc) {
1141                         wl->beacon_int = bss_conf->beacon_int;
1142
1143                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1144                         if (!skb)
1145                                 goto out_sleep;
1146
1147                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1148                                                       skb->data,
1149                                                       skb->len);
1150                         dev_kfree_skb(skb);
1151                         if (ret < 0)
1152                                 goto out_sleep;
1153
1154                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1155                         if (ret < 0)
1156                                 goto out_sleep;
1157                 } else {
1158                         /* use defaults when not associated */
1159                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1160                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1161                 }
1162         }
1163         if (changed & BSS_CHANGED_ERP_SLOT) {
1164                 if (bss_conf->use_short_slot)
1165                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1166                 else
1167                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1168                 if (ret < 0) {
1169                         wl1251_warning("Set slot time failed %d", ret);
1170                         goto out_sleep;
1171                 }
1172         }
1173
1174         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1175                 if (bss_conf->use_short_preamble)
1176                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1177                 else
1178                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1179         }
1180
1181         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1182                 if (bss_conf->use_cts_prot)
1183                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1184                 else
1185                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1186                 if (ret < 0) {
1187                         wl1251_warning("Set ctsprotect failed %d", ret);
1188                         goto out_sleep;
1189                 }
1190         }
1191
1192         if (changed & BSS_CHANGED_ARP_FILTER) {
1193                 __be32 addr = bss_conf->arp_addr_list[0];
1194                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1195
1196                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1197                 ret = wl1251_acx_arp_ip_filter(wl, enable, addr);
1198                 if (ret < 0)
1199                         goto out_sleep;
1200         }
1201
1202         if (changed & BSS_CHANGED_BEACON) {
1203                 beacon = ieee80211_beacon_get(hw, vif);
1204                 if (!beacon)
1205                         goto out_sleep;
1206
1207                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1208                                               beacon->len);
1209
1210                 if (ret < 0) {
1211                         dev_kfree_skb(beacon);
1212                         goto out_sleep;
1213                 }
1214
1215                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1216                                               beacon->len);
1217
1218                 dev_kfree_skb(beacon);
1219
1220                 if (ret < 0)
1221                         goto out_sleep;
1222
1223                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1224                                   wl->beacon_int, wl->dtim_period);
1225
1226                 if (ret < 0)
1227                         goto out_sleep;
1228         }
1229
1230 out_sleep:
1231         wl1251_ps_elp_sleep(wl);
1232
1233 out:
1234         mutex_unlock(&wl->mutex);
1235 }
1236
1237
1238 /* can't be const, mac80211 writes to this */
1239 static struct ieee80211_rate wl1251_rates[] = {
1240         { .bitrate = 10,
1241           .hw_value = 0x1,
1242           .hw_value_short = 0x1, },
1243         { .bitrate = 20,
1244           .hw_value = 0x2,
1245           .hw_value_short = 0x2,
1246           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1247         { .bitrate = 55,
1248           .hw_value = 0x4,
1249           .hw_value_short = 0x4,
1250           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1251         { .bitrate = 110,
1252           .hw_value = 0x20,
1253           .hw_value_short = 0x20,
1254           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1255         { .bitrate = 60,
1256           .hw_value = 0x8,
1257           .hw_value_short = 0x8, },
1258         { .bitrate = 90,
1259           .hw_value = 0x10,
1260           .hw_value_short = 0x10, },
1261         { .bitrate = 120,
1262           .hw_value = 0x40,
1263           .hw_value_short = 0x40, },
1264         { .bitrate = 180,
1265           .hw_value = 0x80,
1266           .hw_value_short = 0x80, },
1267         { .bitrate = 240,
1268           .hw_value = 0x200,
1269           .hw_value_short = 0x200, },
1270         { .bitrate = 360,
1271          .hw_value = 0x400,
1272          .hw_value_short = 0x400, },
1273         { .bitrate = 480,
1274           .hw_value = 0x800,
1275           .hw_value_short = 0x800, },
1276         { .bitrate = 540,
1277           .hw_value = 0x1000,
1278           .hw_value_short = 0x1000, },
1279 };
1280
1281 /* can't be const, mac80211 writes to this */
1282 static struct ieee80211_channel wl1251_channels[] = {
1283         { .hw_value = 1, .center_freq = 2412},
1284         { .hw_value = 2, .center_freq = 2417},
1285         { .hw_value = 3, .center_freq = 2422},
1286         { .hw_value = 4, .center_freq = 2427},
1287         { .hw_value = 5, .center_freq = 2432},
1288         { .hw_value = 6, .center_freq = 2437},
1289         { .hw_value = 7, .center_freq = 2442},
1290         { .hw_value = 8, .center_freq = 2447},
1291         { .hw_value = 9, .center_freq = 2452},
1292         { .hw_value = 10, .center_freq = 2457},
1293         { .hw_value = 11, .center_freq = 2462},
1294         { .hw_value = 12, .center_freq = 2467},
1295         { .hw_value = 13, .center_freq = 2472},
1296 };
1297
1298 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1299                              struct ieee80211_vif *vif, u16 queue,
1300                              const struct ieee80211_tx_queue_params *params)
1301 {
1302         enum wl1251_acx_ps_scheme ps_scheme;
1303         struct wl1251 *wl = hw->priv;
1304         int ret;
1305
1306         mutex_lock(&wl->mutex);
1307
1308         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1309
1310         ret = wl1251_ps_elp_wakeup(wl);
1311         if (ret < 0)
1312                 goto out;
1313
1314         /* mac80211 uses units of 32 usec */
1315         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1316                                 params->cw_min, params->cw_max,
1317                                 params->aifs, params->txop * 32);
1318         if (ret < 0)
1319                 goto out_sleep;
1320
1321         if (params->uapsd)
1322                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1323         else
1324                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1325
1326         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1327                                  CHANNEL_TYPE_EDCF,
1328                                  wl1251_tx_get_queue(queue), ps_scheme,
1329                                  WL1251_ACX_ACK_POLICY_LEGACY);
1330         if (ret < 0)
1331                 goto out_sleep;
1332
1333 out_sleep:
1334         wl1251_ps_elp_sleep(wl);
1335
1336 out:
1337         mutex_unlock(&wl->mutex);
1338
1339         return ret;
1340 }
1341
1342 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1343                                 struct survey_info *survey)
1344 {
1345         struct wl1251 *wl = hw->priv;
1346         struct ieee80211_conf *conf = &hw->conf;
1347
1348         if (idx != 0)
1349                 return -ENOENT;
1350
1351         survey->channel = conf->chandef.chan;
1352         survey->filled = SURVEY_INFO_NOISE_DBM;
1353         survey->noise = wl->noise;
1354
1355         return 0;
1356 }
1357
1358 /* can't be const, mac80211 writes to this */
1359 static struct ieee80211_supported_band wl1251_band_2ghz = {
1360         .channels = wl1251_channels,
1361         .n_channels = ARRAY_SIZE(wl1251_channels),
1362         .bitrates = wl1251_rates,
1363         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1364 };
1365
1366 static const struct ieee80211_ops wl1251_ops = {
1367         .start = wl1251_op_start,
1368         .stop = wl1251_op_stop,
1369         .add_interface = wl1251_op_add_interface,
1370         .remove_interface = wl1251_op_remove_interface,
1371         .config = wl1251_op_config,
1372         .prepare_multicast = wl1251_op_prepare_multicast,
1373         .configure_filter = wl1251_op_configure_filter,
1374         .tx = wl1251_op_tx,
1375         .set_key = wl1251_op_set_key,
1376         .hw_scan = wl1251_op_hw_scan,
1377         .bss_info_changed = wl1251_op_bss_info_changed,
1378         .set_rts_threshold = wl1251_op_set_rts_threshold,
1379         .conf_tx = wl1251_op_conf_tx,
1380         .get_survey = wl1251_op_get_survey,
1381 };
1382
1383 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1384 {
1385         unsigned long timeout;
1386
1387         wl1251_reg_write32(wl, EE_ADDR, offset);
1388         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1389
1390         /* EE_CTL_READ clears when data is ready */
1391         timeout = jiffies + msecs_to_jiffies(100);
1392         while (1) {
1393                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1394                         break;
1395
1396                 if (time_after(jiffies, timeout))
1397                         return -ETIMEDOUT;
1398
1399                 msleep(1);
1400         }
1401
1402         *data = wl1251_reg_read32(wl, EE_DATA);
1403         return 0;
1404 }
1405
1406 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1407                               u8 *data, size_t len)
1408 {
1409         size_t i;
1410         int ret;
1411
1412         wl1251_reg_write32(wl, EE_START, 0);
1413
1414         for (i = 0; i < len; i++) {
1415                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1416                 if (ret < 0)
1417                         return ret;
1418         }
1419
1420         return 0;
1421 }
1422
1423 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1424 {
1425         u8 mac[ETH_ALEN];
1426         int i, ret;
1427
1428         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1429
1430         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1431         if (ret < 0) {
1432                 wl1251_warning("failed to read MAC address from EEPROM");
1433                 return ret;
1434         }
1435
1436         /* MAC is stored in reverse order */
1437         for (i = 0; i < ETH_ALEN; i++)
1438                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1439
1440         return 0;
1441 }
1442
1443 #define NVS_OFF_MAC_LEN 0x19
1444 #define NVS_OFF_MAC_ADDR_LO 0x1a
1445 #define NVS_OFF_MAC_ADDR_HI 0x1b
1446 #define NVS_OFF_MAC_DATA 0x1c
1447
1448 static int wl1251_check_nvs_mac(struct wl1251 *wl)
1449 {
1450         if (wl->nvs_len < 0x24)
1451                 return -ENODATA;
1452
1453         /* length is 2 and data address is 0x546c (ANDed with 0xfffe) */
1454         if (wl->nvs[NVS_OFF_MAC_LEN] != 2 ||
1455             wl->nvs[NVS_OFF_MAC_ADDR_LO] != 0x6d ||
1456             wl->nvs[NVS_OFF_MAC_ADDR_HI] != 0x54)
1457                 return -EINVAL;
1458
1459         return 0;
1460 }
1461
1462 static int wl1251_read_nvs_mac(struct wl1251 *wl)
1463 {
1464         u8 mac[ETH_ALEN];
1465         int i, ret;
1466
1467         ret = wl1251_check_nvs_mac(wl);
1468         if (ret)
1469                 return ret;
1470
1471         /* MAC is stored in reverse order */
1472         for (i = 0; i < ETH_ALEN; i++)
1473                 mac[i] = wl->nvs[NVS_OFF_MAC_DATA + ETH_ALEN - i - 1];
1474
1475         /* 00:00:20:07:03:09 is in /*(DEBLOBBED)*/
1476         if (ether_addr_equal_unaligned(mac, "\x00\x00\x20\x07\x03\x09"))
1477                 return -EINVAL;
1478
1479         memcpy(wl->mac_addr, mac, ETH_ALEN);
1480         return 0;
1481 }
1482
1483 static int wl1251_write_nvs_mac(struct wl1251 *wl)
1484 {
1485         int i, ret;
1486
1487         ret = wl1251_check_nvs_mac(wl);
1488         if (ret)
1489                 return ret;
1490
1491         /* MAC is stored in reverse order */
1492         for (i = 0; i < ETH_ALEN; i++)
1493                 wl->nvs[NVS_OFF_MAC_DATA + i] = wl->mac_addr[ETH_ALEN - i - 1];
1494
1495         return 0;
1496 }
1497
1498 static int wl1251_register_hw(struct wl1251 *wl)
1499 {
1500         int ret;
1501
1502         if (wl->mac80211_registered)
1503                 return 0;
1504
1505         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1506
1507         ret = ieee80211_register_hw(wl->hw);
1508         if (ret < 0) {
1509                 wl1251_error("unable to register mac80211 hw: %d", ret);
1510                 return ret;
1511         }
1512
1513         wl->mac80211_registered = true;
1514
1515         wl1251_notice("loaded");
1516
1517         return 0;
1518 }
1519
1520 int wl1251_init_ieee80211(struct wl1251 *wl)
1521 {
1522         int ret;
1523
1524         /* The tx descriptor buffer and the TKIP space */
1525         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1526                 + WL1251_TKIP_IV_SPACE;
1527
1528         /* unit us */
1529         /* FIXME: find a proper value */
1530
1531         ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1532         ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1533
1534         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1535                                          BIT(NL80211_IFTYPE_ADHOC);
1536         wl->hw->wiphy->max_scan_ssids = 1;
1537         wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1538
1539         wl->hw->queues = 4;
1540
1541         if (wl->nvs == NULL && !wl->use_eeprom) {
1542                 ret = wl1251_fetch_nvs(wl);
1543                 if (ret < 0)
1544                         goto out;
1545         }
1546
1547         if (wl->use_eeprom)
1548                 ret = wl1251_read_eeprom_mac(wl);
1549         else
1550                 ret = wl1251_read_nvs_mac(wl);
1551
1552         if (ret == 0 && !is_valid_ether_addr(wl->mac_addr))
1553                 ret = -EINVAL;
1554
1555         if (ret < 0) {
1556                 /*
1557                  * In case our MAC address is not correctly set,
1558                  * we use a random but Nokia MAC.
1559                  */
1560                 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1561                 memcpy(wl->mac_addr, nokia_oui, 3);
1562                 get_random_bytes(wl->mac_addr + 3, 3);
1563                 if (!wl->use_eeprom)
1564                         wl1251_write_nvs_mac(wl);
1565                 wl1251_warning("MAC address in eeprom or nvs data is not valid");
1566                 wl1251_warning("Setting random MAC address: %pM", wl->mac_addr);
1567         }
1568
1569         ret = wl1251_register_hw(wl);
1570         if (ret)
1571                 goto out;
1572
1573         wl1251_debugfs_init(wl);
1574         wl1251_notice("initialized");
1575
1576         ret = 0;
1577
1578 out:
1579         return ret;
1580 }
1581 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1582
1583 struct ieee80211_hw *wl1251_alloc_hw(void)
1584 {
1585         struct ieee80211_hw *hw;
1586         struct wl1251 *wl;
1587         int i;
1588
1589         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1590         if (!hw) {
1591                 wl1251_error("could not alloc ieee80211_hw");
1592                 return ERR_PTR(-ENOMEM);
1593         }
1594
1595         wl = hw->priv;
1596         memset(wl, 0, sizeof(*wl));
1597
1598         wl->hw = hw;
1599
1600         wl->data_in_count = 0;
1601
1602         skb_queue_head_init(&wl->tx_queue);
1603
1604         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1605         wl->channel = WL1251_DEFAULT_CHANNEL;
1606         wl->monitor_present = false;
1607         wl->joined = false;
1608         wl->scanning = false;
1609         wl->bss_type = MAX_BSS_TYPE;
1610         wl->default_key = 0;
1611         wl->listen_int = 1;
1612         wl->rx_counter = 0;
1613         wl->rx_handled = 0;
1614         wl->rx_current_buffer = 0;
1615         wl->rx_last_id = 0;
1616         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1617         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1618         wl->elp = false;
1619         wl->station_mode = STATION_ACTIVE_MODE;
1620         wl->psm_requested = false;
1621         wl->psm_entry_retry = 0;
1622         wl->tx_queue_stopped = false;
1623         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1624         wl->rssi_thold = 0;
1625         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1626         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1627         wl->vif = NULL;
1628
1629         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1630                 wl->tx_frames[i] = NULL;
1631
1632         wl->next_tx_complete = 0;
1633
1634         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1635         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1636
1637         wl->state = WL1251_STATE_OFF;
1638         mutex_init(&wl->mutex);
1639         spin_lock_init(&wl->wl_lock);
1640
1641         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1642         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1643
1644         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1645         if (!wl->rx_descriptor) {
1646                 wl1251_error("could not allocate memory for rx descriptor");
1647                 ieee80211_free_hw(hw);
1648                 return ERR_PTR(-ENOMEM);
1649         }
1650
1651         return hw;
1652 }
1653 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1654
1655 int wl1251_free_hw(struct wl1251 *wl)
1656 {
1657         ieee80211_unregister_hw(wl->hw);
1658
1659         wl1251_debugfs_exit(wl);
1660
1661         kfree(wl->target_mem_map);
1662         kfree(wl->data_path);
1663         vfree(wl->fw);
1664         wl->fw = NULL;
1665         kfree(wl->nvs);
1666         wl->nvs = NULL;
1667
1668         kfree(wl->rx_descriptor);
1669         wl->rx_descriptor = NULL;
1670
1671         ieee80211_free_hw(wl->hw);
1672
1673         return 0;
1674 }
1675 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1676
1677 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1678 MODULE_LICENSE("GPL");
1679 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1680 /*(DEBLOBBED)*/