drivers/net/wireless/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 = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379 out:
 380         return ret;
 381 }
 382
 383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386         unsigned long flags;
 387
 388         skb_queue_tail(&wl->tx_queue, skb);
 389
 390         /*
 391          * The chip specific setup must run before the first TX packet -
 392          * before that, the tx_work will not be initialized!
 393          */
 394
 395         ieee80211_queue_work(wl->hw, &wl->tx_work);
 396
 397         /*
 398          * The workqueue is slow to process the tx_queue and we need stop
 399          * the queue here, otherwise the queue will get too long.
 400          */
 401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 403
 404                 spin_lock_irqsave(&wl->wl_lock, flags);
 405                 ieee80211_stop_queues(wl->hw);
 406                 wl->tx_queue_stopped = true;
 407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 408         }
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_delayed_work_sync(&wl->ps_work);
 487         cancel_delayed_work_sync(&wl->elp_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->station_mode = STATION_ACTIVE_MODE;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->rssi_thold = 0;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511         wl->monitor_present = false;
 512         wl->joined = false;
 513
 514         wl1251_debugfs_reset(wl);
 515
 516         mutex_unlock(&wl->mutex);
 517 }
 518
 519 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 520                                    struct ieee80211_vif *vif)
 521 {
 522         struct wl1251 *wl = hw->priv;
 523         int ret = 0;
 524
 525         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 526                      vif->type, vif->addr);
 527
 528         mutex_lock(&wl->mutex);
 529         if (wl->vif) {
 530                 ret = -EBUSY;
 531                 goto out;
 532         }
 533
 534         wl->vif = vif;
 535
 536         switch (vif->type) {
 537         case NL80211_IFTYPE_STATION:
 538                 wl->bss_type = BSS_TYPE_STA_BSS;
 539                 break;
 540         case NL80211_IFTYPE_ADHOC:
 541                 wl->bss_type = BSS_TYPE_IBSS;
 542                 break;
 543         default:
 544                 ret = -EOPNOTSUPP;
 545                 goto out;
 546         }
 547
 548         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 549                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 550                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 551                 ret = wl1251_acx_station_id(wl);
 552                 if (ret < 0)
 553                         goto out;
 554         }
 555
 556 out:
 557         mutex_unlock(&wl->mutex);
 558         return ret;
 559 }
 560
 561 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 562                                          struct ieee80211_vif *vif)
 563 {
 564         struct wl1251 *wl = hw->priv;
 565
 566         mutex_lock(&wl->mutex);
 567         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 568         wl->vif = NULL;
 569         memset(wl->bssid, 0, ETH_ALEN);
 570         mutex_unlock(&wl->mutex);
 571 }
 572
 573 static int wl1251_build_null_data(struct wl1251 *wl)
 574 {
 575         struct sk_buff *skb = NULL;
 576         int size;
 577         void *ptr;
 578         int ret = -ENOMEM;
 579
 580
 581         if (wl->bss_type == BSS_TYPE_IBSS) {
 582                 size = sizeof(struct wl12xx_null_data_template);
 583                 ptr = NULL;
 584         } else {
 585                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 586                 if (!skb)
 587                         goto out;
 588                 size = skb->len;
 589                 ptr = skb->data;
 590         }
 591
 592         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 593
 594 out:
 595         dev_kfree_skb(skb);
 596         if (ret)
 597                 wl1251_warning("cmd buld null data failed %d", ret);
 598
 599         return ret;
 600
 601 }
 602
 603 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 604 {
 605         struct ieee80211_qos_hdr template;
 606
 607         memset(&template, 0, sizeof(template));
 608
 609         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 610         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 611         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 612
 613         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 614                                              IEEE80211_STYPE_QOS_NULLFUNC |
 615                                              IEEE80211_FCTL_TODS);
 616
 617         /* FIXME: not sure what priority to use here */
 618         template.qos_ctrl = cpu_to_le16(0);
 619
 620         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 621                                        sizeof(template));
 622 }
 623
 624 static void wl1251_ps_work(struct work_struct *work)
 625 {
 626         struct delayed_work *dwork;
 627         struct wl1251 *wl;
 628         unsigned long diff, wait;
 629         bool need_ps;
 630         bool have_ps;
 631         int ret;
 632         int i;
 633
 634         dwork = container_of(work, struct delayed_work, work);
 635         wl = container_of(dwork, struct wl1251, ps_work);
 636
 637         mutex_lock(&wl->mutex);
 638
 639         /* don't change PS modes while still transitioning, to avoid possbile
 640          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 641         if (wl->ps_transitioning) {
 642                 diff = jiffies - wl->ps_change_jiffies;
 643                 if (diff > msecs_to_jiffies(500)) {
 644                         wl1251_error("PS change taking too long: %lu", diff);
 645                         wl->ps_transitioning = false;
 646                 } else {
 647                         //wl1251_error("PS still transitioning");
 648                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 649                                 msecs_to_jiffies(50));
 650                         goto out;
 651                 }
 652         }
 653
 654         need_ps = wl->psm_requested && !wl->bss_lost;
 655         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 656
 657         if (need_ps == have_ps) {
 658                 //wl1251_info("ps: already in mode %d", have_ps);
 659                 goto out;
 660         }
 661
 662         /* don't enter PS if there was recent activity */
 663         if (need_ps) {
 664                 wait = 0;
 665
 666                 diff = jiffies - wl->last_io_jiffies;
 667                 if (diff < msecs_to_jiffies(150)) {
 668                         //wl1251_info("ps: postponed psm, j %ld", diff);
 669                         wait = msecs_to_jiffies(150) - diff + 1;
 670                 }
 671
 672                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 673                         if (wl->tx_frames[i] != NULL) {
 674                                 //wl1251_error("  frm %d busy", i);
 675                                 if (wait < msecs_to_jiffies(50))
 676                                         wait = msecs_to_jiffies(50);
 677                                 break;
 678                         }
 679                 }
 680
 681                 if (wait > 0) {
 682                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 683                         goto out;
 684                 }
 685         }
 686
 687         ret = wl1251_ps_elp_wakeup(wl);
 688         if (ret < 0)
 689                 goto out;
 690
 691         if (need_ps) {
 692                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 693                                             wl->dtim_period);
 694         }
 695         ret = wl1251_ps_set_mode(wl,
 696                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 697         if (ret < 0)
 698                 goto out_sleep;
 699
 700         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 701         //      jiffies - wl->last_io_jiffies);
 702
 703 out_sleep:
 704         wl1251_ps_elp_sleep(wl);
 705
 706 out:
 707         mutex_unlock(&wl->mutex);
 708 }
 709
 710 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 711 {
 712         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 713 }
 714
 715 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 716 {
 717         struct wl1251 *wl = hw->priv;
 718         struct ieee80211_conf *conf = &hw->conf;
 719         int channel, ret = 0;
 720
 721         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 722
 723         wl1251_debug(DEBUG_MAC80211,
 724                      "mac80211 config ch %d monitor %s psm %s power %d",
 725                      channel,
 726                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 727                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 728                      conf->power_level);
 729
 730         mutex_lock(&wl->mutex);
 731
 732         ret = wl1251_ps_elp_wakeup(wl);
 733         if (ret < 0)
 734                 goto out;
 735
 736         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 737                 u32 mode;
 738
 739                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 740                         wl->monitor_present = true;
 741                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 742                 } else {
 743                         wl->monitor_present = false;
 744                         mode = 0;
 745                 }
 746
 747                 ret = wl1251_acx_feature_cfg(wl, mode);
 748                 if (ret < 0)
 749                         goto out_sleep;
 750         }
 751
 752         if (channel != wl->channel) {
 753                 wl->channel = channel;
 754
 755                 /*
 756                  * Use ENABLE_RX command for channel switching when no
 757                  * interface is present (monitor mode only).
 758                  * This leaves the tx path disabled in firmware, whereas
 759                  * the usual JOIN command seems to transmit some frames
 760                  * at firmware level.
 761                  *
 762                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 763                  * one join has to be performed before CMD_ENABLE_RX can
 764                  * properly switch channels (join will be done by CONF_IDLE).
 765                  */
 766                 if (wl->vif == NULL) {
 767                         wl->bss_type = BSS_TYPE_STA_BSS;
 768                         wl->joined = false;
 769                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 770                 } else {
 771                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 772                                           wl->beacon_int, wl->dtim_period);
 773                 }
 774                 if (ret < 0)
 775                         goto out_sleep;
 776         }
 777
 778         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 779                 wl1251_debug(DEBUG_PSM, "psm enabled");
 780
 781                 wl->psm_requested = true;
 782
 783                 wl->dtim_period = conf->ps_dtim_period;
 784
 785                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 786         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 787                 wl1251_debug(DEBUG_PSM, "psm disabled");
 788
 789                 wl->psm_requested = false;
 790
 791                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 792         }
 793
 794         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 795                 if (conf->flags & IEEE80211_CONF_IDLE) {
 796                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 797                         if (ret < 0)
 798                                 goto out_sleep;
 799                 } else {
 800                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 801                         if (ret < 0)
 802                                 goto out_sleep;
 803
 804                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 805                         if (ret < 0)
 806                                 wl1251_error("error waiting for wakeup");
 807
 808                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 809                                           wl->beacon_int, wl->dtim_period);
 810                         if (ret < 0)
 811                                 goto out_sleep;
 812                 }
 813         }
 814
 815         if (conf->power_level != wl->power_level) {
 816                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 817                 if (ret < 0)
 818                         goto out_sleep;
 819
 820                 wl->power_level = conf->power_level;
 821         }
 822
 823         /*
 824          * Tell stack that connection is lost because hw encryption isn't
 825          * supported in monitor mode.
 826          * This requires temporary enabling of the hw connection monitor flag
 827          */
 828         if ((changed & IEEE80211_CONF_CHANGE_MONITOR) && wl->vif) {
 829                 wl->hw->flags |= IEEE80211_HW_CONNECTION_MONITOR;
 830                 ieee80211_connection_loss(wl->vif);
 831         }
 832
 833 out_sleep:
 834         wl1251_ps_elp_sleep(wl);
 835
 836 out:
 837         mutex_unlock(&wl->mutex);
 838
 839         return ret;
 840 }
 841
 842 struct wl1251_filter_params {
 843         bool enabled;
 844         int mc_list_length;
 845         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 846 };
 847
 848 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 849                                        struct netdev_hw_addr_list *mc_list)
 850 {
 851         struct wl1251_filter_params *fp;
 852         struct netdev_hw_addr *ha;
 853         struct wl1251 *wl = hw->priv;
 854
 855         if (unlikely(wl->state == WL1251_STATE_OFF))
 856                 return 0;
 857
 858         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 859         if (!fp) {
 860                 wl1251_error("Out of memory setting filters.");
 861                 return 0;
 862         }
 863
 864         /* update multicast filtering parameters */
 865         fp->mc_list_length = 0;
 866         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 867                 fp->enabled = false;
 868         } else {
 869                 fp->enabled = true;
 870                 netdev_hw_addr_list_for_each(ha, mc_list) {
 871                         memcpy(fp->mc_list[fp->mc_list_length],
 872                                         ha->addr, ETH_ALEN);
 873                         fp->mc_list_length++;
 874                 }
 875         }
 876
 877         return (u64)(unsigned long)fp;
 878 }
 879
 880 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 881                                   FIF_ALLMULTI | \
 882                                   FIF_FCSFAIL | \
 883                                   FIF_BCN_PRBRESP_PROMISC | \
 884                                   FIF_CONTROL | \
 885                                   FIF_OTHER_BSS | \
 886                                   FIF_PROBE_REQ)
 887
 888 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 889                                        unsigned int changed,
 890                                        unsigned int *total, u64 multicast)
 891 {
 892         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 893         struct wl1251 *wl = hw->priv;
 894         int ret;
 895
 896         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 897
 898         *total &= WL1251_SUPPORTED_FILTERS;
 899         changed &= WL1251_SUPPORTED_FILTERS;
 900
 901         if (changed == 0) {
 902                 /* no filters which we support changed */
 903                 kfree(fp);
 904                 return;
 905         }
 906
 907         mutex_lock(&wl->mutex);
 908
 909         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 910         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 911
 912         if (*total & FIF_PROMISC_IN_BSS) {
 913                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 914                 wl->rx_config |= CFG_RX_ALL_GOOD;
 915         }
 916         if (*total & FIF_ALLMULTI)
 917                 /*
 918                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 919                  * all multicast frames
 920                  */
 921                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 922         if (*total & FIF_FCSFAIL)
 923                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 924         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 925                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 926                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 927         }
 928         if (*total & FIF_CONTROL)
 929                 wl->rx_filter |= CFG_RX_CTL_EN;
 930         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 931                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 932         if (*total & FIF_PROBE_REQ)
 933                 wl->rx_filter |= CFG_RX_PREQ_EN;
 934
 935         if (wl->state == WL1251_STATE_OFF)
 936                 goto out;
 937
 938         ret = wl1251_ps_elp_wakeup(wl);
 939         if (ret < 0)
 940                 goto out;
 941
 942         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 943                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 944         else if (fp)
 945                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 946                                                    fp->mc_list,
 947                                                    fp->mc_list_length);
 948         if (ret < 0)
 949                 goto out;
 950
 951         /* send filters to firmware */
 952         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 953
 954         wl1251_ps_elp_sleep(wl);
 955
 956 out:
 957         mutex_unlock(&wl->mutex);
 958         kfree(fp);
 959 }
 960
 961 /* HW encryption */
 962 static int wl1251_set_key_type(struct wl1251 *wl,
 963                                struct wl1251_cmd_set_keys *key,
 964                                enum set_key_cmd cmd,
 965                                struct ieee80211_key_conf *mac80211_key,
 966                                const u8 *addr)
 967 {
 968         switch (mac80211_key->cipher) {
 969         case WLAN_CIPHER_SUITE_WEP40:
 970         case WLAN_CIPHER_SUITE_WEP104:
 971                 if (is_broadcast_ether_addr(addr))
 972                         key->key_type = KEY_WEP_DEFAULT;
 973                 else
 974                         key->key_type = KEY_WEP_ADDR;
 975
 976                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 977                 break;
 978         case WLAN_CIPHER_SUITE_TKIP:
 979                 if (is_broadcast_ether_addr(addr))
 980                         key->key_type = KEY_TKIP_MIC_GROUP;
 981                 else
 982                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 983
 984                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 985                 break;
 986         case WLAN_CIPHER_SUITE_CCMP:
 987                 if (is_broadcast_ether_addr(addr))
 988                         key->key_type = KEY_AES_GROUP;
 989                 else
 990                         key->key_type = KEY_AES_PAIRWISE;
 991                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 992                 break;
 993         default:
 994                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 995                 return -EOPNOTSUPP;
 996         }
 997
 998         return 0;
 999 }
1000
1001 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1002                              struct ieee80211_vif *vif,
1003                              struct ieee80211_sta *sta,
1004                              struct ieee80211_key_conf *key)
1005 {
1006         struct wl1251 *wl = hw->priv;
1007         struct wl1251_cmd_set_keys *wl_cmd;
1008         const u8 *addr;
1009         int ret;
1010
1011         static const u8 bcast_addr[ETH_ALEN] =
1012                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1013
1014         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1015
1016         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1017         if (!wl_cmd) {
1018                 ret = -ENOMEM;
1019                 goto out;
1020         }
1021
1022         addr = sta ? sta->addr : bcast_addr;
1023
1024         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1025         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1026         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1027                      key->cipher, key->keyidx, key->keylen, key->flags);
1028         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1029
1030         if (is_zero_ether_addr(addr)) {
1031                 /* We dont support TX only encryption */
1032                 ret = -EOPNOTSUPP;
1033                 goto out;
1034         }
1035
1036         mutex_lock(&wl->mutex);
1037
1038         switch (cmd) {
1039         case SET_KEY:
1040                 if (wl->monitor_present) {
1041                         ret = -EOPNOTSUPP;
1042                         goto out_unlock;
1043                 }
1044                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1045                 break;
1046         case DISABLE_KEY:
1047                 wl_cmd->key_action = KEY_REMOVE;
1048                 break;
1049         default:
1050                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1051                 break;
1052         }
1053
1054         ret = wl1251_ps_elp_wakeup(wl);
1055         if (ret < 0)
1056                 goto out_unlock;
1057
1058         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1059         if (ret < 0) {
1060                 wl1251_error("Set KEY type failed");
1061                 goto out_sleep;
1062         }
1063
1064         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1065                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1066
1067         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1068             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1069                 /*
1070                  * We get the key in the following form:
1071                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1072                  * but the target is expecting:
1073                  * TKIP - RX MIC - TX MIC
1074                  */
1075                 memcpy(wl_cmd->key, key->key, 16);
1076                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1077                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1078
1079         } else {
1080                 memcpy(wl_cmd->key, key->key, key->keylen);
1081         }
1082         wl_cmd->key_size = key->keylen;
1083
1084         wl_cmd->id = key->keyidx;
1085         wl_cmd->ssid_profile = 0;
1086
1087         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1088
1089         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1090         if (ret < 0) {
1091                 wl1251_warning("could not set keys");
1092                 goto out_sleep;
1093         }
1094
1095 out_sleep:
1096         wl1251_ps_elp_sleep(wl);
1097
1098 out_unlock:
1099         mutex_unlock(&wl->mutex);
1100
1101 out:
1102         kfree(wl_cmd);
1103
1104         return ret;
1105 }
1106
1107 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1108                              struct ieee80211_vif *vif,
1109                              struct cfg80211_scan_request *req)
1110 {
1111         struct wl1251 *wl = hw->priv;
1112         struct sk_buff *skb;
1113         size_t ssid_len = 0;
1114         u8 *ssid = NULL;
1115         int ret;
1116
1117         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1118
1119         if (req->n_ssids) {
1120                 ssid = req->ssids[0].ssid;
1121                 ssid_len = req->ssids[0].ssid_len;
1122         }
1123
1124         mutex_lock(&wl->mutex);
1125
1126         if (wl->scanning) {
1127                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1128                 ret = -EINVAL;
1129                 goto out;
1130         }
1131
1132         ret = wl1251_ps_elp_wakeup(wl);
1133         if (ret < 0)
1134                 goto out;
1135
1136         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1137                                      req->ie, req->ie_len);
1138         if (!skb) {
1139                 ret = -ENOMEM;
1140                 goto out;
1141         }
1142
1143         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1144                                       skb->len);
1145         dev_kfree_skb(skb);
1146         if (ret < 0)
1147                 goto out_sleep;
1148
1149         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1150         if (ret < 0)
1151                 goto out_sleep;
1152
1153         wl->scanning = true;
1154
1155         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1156                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1157         if (ret < 0) {
1158                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1159                 wl->scanning = false;
1160                 goto out_sleep;
1161         }
1162
1163 out_sleep:
1164         wl1251_ps_elp_sleep(wl);
1165
1166 out:
1167         mutex_unlock(&wl->mutex);
1168
1169         return ret;
1170 }
1171
1172 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1173 {
1174         struct wl1251 *wl = hw->priv;
1175         int ret;
1176
1177         mutex_lock(&wl->mutex);
1178
1179         ret = wl1251_ps_elp_wakeup(wl);
1180         if (ret < 0)
1181                 goto out;
1182
1183         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1184         if (ret < 0)
1185                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1186
1187         wl1251_ps_elp_sleep(wl);
1188
1189 out:
1190         mutex_unlock(&wl->mutex);
1191
1192         return ret;
1193 }
1194
1195 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1196                                        struct ieee80211_vif *vif,
1197                                        struct ieee80211_bss_conf *bss_conf,
1198                                        u32 changed)
1199 {
1200         struct wl1251 *wl = hw->priv;
1201         struct sk_buff *beacon, *skb;
1202         bool do_join = false;
1203         bool enable;
1204         int ret;
1205
1206         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1207
1208         mutex_lock(&wl->mutex);
1209
1210         ret = wl1251_ps_elp_wakeup(wl);
1211         if (ret < 0)
1212                 goto out;
1213
1214         if (changed & BSS_CHANGED_CQM) {
1215                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1216                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1217                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1218                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1219                 if (ret < 0)
1220                         goto out;
1221                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1222         }
1223
1224         if ((changed & BSS_CHANGED_BSSID) &&
1225             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1226                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1227
1228                 if (!is_zero_ether_addr(wl->bssid)) {
1229                         ret = wl1251_build_null_data(wl);
1230                         if (ret < 0)
1231                                 goto out_sleep;
1232
1233                         ret = wl1251_build_qos_null_data(wl);
1234                         if (ret < 0)
1235                                 goto out_sleep;
1236
1237                         do_join = true;
1238                 }
1239         }
1240
1241         if (changed & BSS_CHANGED_ASSOC) {
1242                 /* Disable temporary enabled hw connection monitor flag */
1243                 wl->hw->flags &= ~IEEE80211_HW_CONNECTION_MONITOR;
1244
1245                 if (bss_conf->assoc) {
1246                         wl->beacon_int = bss_conf->beacon_int;
1247
1248                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1249                         if (!skb)
1250                                 goto out_sleep;
1251
1252                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1253                                                       skb->data,
1254                                                       skb->len);
1255                         dev_kfree_skb(skb);
1256                         if (ret < 0)
1257                                 goto out_sleep;
1258
1259                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1260                         if (ret < 0)
1261                                 goto out_sleep;
1262                 } else {
1263                         /* use defaults when not associated */
1264                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1265                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1266                 }
1267         }
1268         if (changed & BSS_CHANGED_ERP_SLOT) {
1269                 if (bss_conf->use_short_slot)
1270                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1271                 else
1272                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1273                 if (ret < 0) {
1274                         wl1251_warning("Set slot time failed %d", ret);
1275                         goto out_sleep;
1276                 }
1277         }
1278
1279         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1280                 if (bss_conf->use_short_preamble)
1281                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1282                 else
1283                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1284         }
1285
1286         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1287                 if (bss_conf->use_cts_prot)
1288                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1289                 else
1290                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1291                 if (ret < 0) {
1292                         wl1251_warning("Set ctsprotect failed %d", ret);
1293                         goto out_sleep;
1294                 }
1295         }
1296
1297         if (changed & BSS_CHANGED_ARP_FILTER) {
1298                 __be32 addr = bss_conf->arp_addr_list[0];
1299                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1300
1301                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1302                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1303
1304                 if (ret < 0)
1305                         goto out_sleep;
1306         }
1307
1308         if (changed & BSS_CHANGED_BEACON) {
1309                 beacon = ieee80211_beacon_get(hw, vif);
1310                 if (!beacon)
1311                         goto out_sleep;
1312
1313                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1314                                               beacon->len);
1315
1316                 if (ret < 0) {
1317                         dev_kfree_skb(beacon);
1318                         goto out_sleep;
1319                 }
1320
1321                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1322                                               beacon->len);
1323
1324                 dev_kfree_skb(beacon);
1325
1326                 if (ret < 0)
1327                         goto out_sleep;
1328
1329                 do_join = true;
1330         }
1331
1332         if (do_join) {
1333                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1334                                   wl->beacon_int, wl->dtim_period);
1335                 if (ret < 0)
1336                         goto out_sleep;
1337         }
1338
1339 out_sleep:
1340         wl1251_ps_elp_sleep(wl);
1341
1342 out:
1343         mutex_unlock(&wl->mutex);
1344 }
1345
1346
1347 /* can't be const, mac80211 writes to this */
1348 static struct ieee80211_rate wl1251_rates[] = {
1349         { .bitrate = 10,
1350           .hw_value = 0x1,
1351           .hw_value_short = 0x1, },
1352         { .bitrate = 20,
1353           .hw_value = 0x2,
1354           .hw_value_short = 0x2,
1355           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1356         { .bitrate = 55,
1357           .hw_value = 0x4,
1358           .hw_value_short = 0x4,
1359           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1360         { .bitrate = 110,
1361           .hw_value = 0x20,
1362           .hw_value_short = 0x20,
1363           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1364         { .bitrate = 60,
1365           .hw_value = 0x8,
1366           .hw_value_short = 0x8, },
1367         { .bitrate = 90,
1368           .hw_value = 0x10,
1369           .hw_value_short = 0x10, },
1370         { .bitrate = 120,
1371           .hw_value = 0x40,
1372           .hw_value_short = 0x40, },
1373         { .bitrate = 180,
1374           .hw_value = 0x80,
1375           .hw_value_short = 0x80, },
1376         { .bitrate = 240,
1377           .hw_value = 0x200,
1378           .hw_value_short = 0x200, },
1379         { .bitrate = 360,
1380          .hw_value = 0x400,
1381          .hw_value_short = 0x400, },
1382         { .bitrate = 480,
1383           .hw_value = 0x800,
1384           .hw_value_short = 0x800, },
1385         { .bitrate = 540,
1386           .hw_value = 0x1000,
1387           .hw_value_short = 0x1000, },
1388 };
1389
1390 /* can't be const, mac80211 writes to this */
1391 static struct ieee80211_channel wl1251_channels[] = {
1392         { .hw_value = 1, .center_freq = 2412},
1393         { .hw_value = 2, .center_freq = 2417},
1394         { .hw_value = 3, .center_freq = 2422},
1395         { .hw_value = 4, .center_freq = 2427},
1396         { .hw_value = 5, .center_freq = 2432},
1397         { .hw_value = 6, .center_freq = 2437},
1398         { .hw_value = 7, .center_freq = 2442},
1399         { .hw_value = 8, .center_freq = 2447},
1400         { .hw_value = 9, .center_freq = 2452},
1401         { .hw_value = 10, .center_freq = 2457},
1402         { .hw_value = 11, .center_freq = 2462},
1403         { .hw_value = 12, .center_freq = 2467},
1404         { .hw_value = 13, .center_freq = 2472},
1405 };
1406
1407 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1408                              struct ieee80211_vif *vif, u16 queue,
1409                              const struct ieee80211_tx_queue_params *params)
1410 {
1411         enum wl1251_acx_ps_scheme ps_scheme;
1412         struct wl1251 *wl = hw->priv;
1413         int ret;
1414
1415         mutex_lock(&wl->mutex);
1416
1417         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1418
1419         ret = wl1251_ps_elp_wakeup(wl);
1420         if (ret < 0)
1421                 goto out;
1422
1423         /* mac80211 uses units of 32 usec */
1424         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1425                                 params->cw_min, params->cw_max,
1426                                 params->aifs, params->txop * 32);
1427         if (ret < 0)
1428                 goto out_sleep;
1429
1430         if (params->uapsd)
1431                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1432         else
1433                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1434
1435         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1436                                  CHANNEL_TYPE_EDCF,
1437                                  wl1251_tx_get_queue(queue), ps_scheme,
1438                                  WL1251_ACX_ACK_POLICY_LEGACY);
1439         if (ret < 0)
1440                 goto out_sleep;
1441
1442 out_sleep:
1443         wl1251_ps_elp_sleep(wl);
1444
1445 out:
1446         mutex_unlock(&wl->mutex);
1447
1448         return ret;
1449 }
1450
1451 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1452                                 struct survey_info *survey)
1453 {
1454         struct wl1251 *wl = hw->priv;
1455         struct ieee80211_conf *conf = &hw->conf;
1456
1457         if (idx != 0)
1458                 return -ENOENT;
1459
1460         survey->channel = conf->channel;
1461         survey->filled = SURVEY_INFO_NOISE_DBM;
1462         survey->noise = wl->noise;
1463
1464         return 0;
1465 }
1466
1467 /* can't be const, mac80211 writes to this */
1468 static struct ieee80211_supported_band wl1251_band_2ghz = {
1469         .channels = wl1251_channels,
1470         .n_channels = ARRAY_SIZE(wl1251_channels),
1471         .bitrates = wl1251_rates,
1472         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1473 };
1474
1475 static const struct ieee80211_ops wl1251_ops = {
1476         .start = wl1251_op_start,
1477         .stop = wl1251_op_stop,
1478         .add_interface = wl1251_op_add_interface,
1479         .remove_interface = wl1251_op_remove_interface,
1480         .config = wl1251_op_config,
1481         .prepare_multicast = wl1251_op_prepare_multicast,
1482         .configure_filter = wl1251_op_configure_filter,
1483         .tx = wl1251_op_tx,
1484         .set_key = wl1251_op_set_key,
1485         .hw_scan = wl1251_op_hw_scan,
1486         .bss_info_changed = wl1251_op_bss_info_changed,
1487         .set_rts_threshold = wl1251_op_set_rts_threshold,
1488         .conf_tx = wl1251_op_conf_tx,
1489         .get_survey = wl1251_op_get_survey,
1490 };
1491
1492 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1493 {
1494         unsigned long timeout;
1495
1496         wl1251_reg_write32(wl, EE_ADDR, offset);
1497         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1498
1499         /* EE_CTL_READ clears when data is ready */
1500         timeout = jiffies + msecs_to_jiffies(100);
1501         while (1) {
1502                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1503                         break;
1504
1505                 if (time_after(jiffies, timeout))
1506                         return -ETIMEDOUT;
1507
1508                 msleep(1);
1509         }
1510
1511         *data = wl1251_reg_read32(wl, EE_DATA);
1512         return 0;
1513 }
1514
1515 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1516                               u8 *data, size_t len)
1517 {
1518         size_t i;
1519         int ret;
1520
1521         wl1251_reg_write32(wl, EE_START, 0);
1522
1523         for (i = 0; i < len; i++) {
1524                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1525                 if (ret < 0)
1526                         return ret;
1527         }
1528
1529         return 0;
1530 }
1531
1532 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1533 {
1534         u8 mac[ETH_ALEN];
1535         int i, ret;
1536
1537         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1538
1539         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1540         if (ret < 0) {
1541                 wl1251_warning("failed to read MAC address from EEPROM");
1542                 return ret;
1543         }
1544
1545         /* MAC is stored in reverse order */
1546         for (i = 0; i < ETH_ALEN; i++)
1547                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1548
1549         return 0;
1550 }
1551
1552 /* temporary (?) hack for EEPROM dumping
1553  * (it seems this can only be done before fw is running) */
1554 static int wl1251_dump_eeprom(struct wl1251 *wl)
1555 {
1556         int ret;
1557
1558         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1559
1560         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1561         if (wl->eeprom_dump == NULL) {
1562                 ret = -ENOMEM;
1563                 goto out;
1564         }
1565
1566         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1567         if (ret != 0) {
1568                 wl1251_error("eeprom dump failed: %d", ret);
1569                 kfree(wl->eeprom_dump);
1570                 wl->eeprom_dump = NULL;
1571                 goto out;
1572         }
1573
1574         wl1251_info("eeprom dumped.");
1575
1576 out:
1577         return ret;
1578 }
1579
1580 static int wl1251_register_hw(struct wl1251 *wl)
1581 {
1582         int ret;
1583
1584         if (wl->mac80211_registered)
1585                 return 0;
1586
1587         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1588
1589         ret = ieee80211_register_hw(wl->hw);
1590         if (ret < 0) {
1591                 wl1251_error("unable to register mac80211 hw: %d", ret);
1592                 return ret;
1593         }
1594
1595         wl->mac80211_registered = true;
1596
1597         wl1251_notice("loaded");
1598
1599         return 0;
1600 }
1601
1602 int wl1251_init_ieee80211(struct wl1251 *wl)
1603 {
1604         int ret;
1605
1606         /* The tx descriptor buffer and the TKIP space */
1607         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1608                 + WL1251_TKIP_IV_SPACE;
1609
1610         /* unit us */
1611         /* FIXME: find a proper value */
1612         wl->hw->channel_change_time = 10000;
1613
1614         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1615                 IEEE80211_HW_SUPPORTS_PS |
1616                 IEEE80211_HW_BEACON_FILTER |
1617                 IEEE80211_HW_SUPPORTS_UAPSD |
1618                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1619
1620         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1621                                          BIT(NL80211_IFTYPE_ADHOC);
1622         wl->hw->wiphy->max_scan_ssids = 1;
1623         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1624
1625         wl->hw->queues = 4;
1626
1627         if (wl->use_eeprom)
1628                 wl1251_read_eeprom_mac(wl);
1629         if (wl->dump_eeprom)
1630                 wl1251_dump_eeprom(wl);
1631
1632         ret = wl1251_register_hw(wl);
1633         if (ret)
1634                 goto out;
1635
1636         wl1251_debugfs_init(wl);
1637         wl1251_notice("initialized");
1638
1639         ret = 0;
1640
1641 out:
1642         return ret;
1643 }
1644 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1645
1646 struct ieee80211_hw *wl1251_alloc_hw(void)
1647 {
1648         struct ieee80211_hw *hw;
1649         struct wl1251 *wl;
1650         int i;
1651         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1652
1653         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1654         if (!hw) {
1655                 wl1251_error("could not alloc ieee80211_hw");
1656                 return ERR_PTR(-ENOMEM);
1657         }
1658
1659         wl = hw->priv;
1660         memset(wl, 0, sizeof(*wl));
1661
1662         wl->hw = hw;
1663
1664         wl->data_in_count = 0;
1665
1666         skb_queue_head_init(&wl->tx_queue);
1667
1668         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1669         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1670         wl->channel = WL1251_DEFAULT_CHANNEL;
1671         wl->monitor_present = false;
1672         wl->joined = false;
1673         wl->scanning = false;
1674         wl->bss_type = MAX_BSS_TYPE;
1675         wl->default_key = 0;
1676         wl->listen_int = 1;
1677         wl->rx_counter = 0;
1678         wl->rx_handled = 0;
1679         wl->rx_current_buffer = 0;
1680         wl->rx_last_id = 0;
1681         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1682         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1683         wl->elp = false;
1684         wl->station_mode = STATION_ACTIVE_MODE;
1685         wl->psm_requested = false;
1686         wl->tx_queue_stopped = false;
1687         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1688         wl->rssi_thold = 0;
1689         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1690         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1691         wl->vif = NULL;
1692
1693         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1694                 wl->tx_frames[i] = NULL;
1695
1696         wl->next_tx_complete = 0;
1697
1698         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1699         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1700
1701         /*
1702          * In case our MAC address is not correctly set,
1703          * we use a random but Nokia MAC.
1704          */
1705         memcpy(wl->mac_addr, nokia_oui, 3);
1706         get_random_bytes(wl->mac_addr + 3, 3);
1707
1708         wl->state = WL1251_STATE_OFF;
1709         mutex_init(&wl->mutex);
1710
1711         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1712         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1713
1714         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1715         if (!wl->rx_descriptor) {
1716                 wl1251_error("could not allocate memory for rx descriptor");
1717                 ieee80211_free_hw(hw);
1718                 return ERR_PTR(-ENOMEM);
1719         }
1720
1721         return hw;
1722 }
1723 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1724
1725 int wl1251_free_hw(struct wl1251 *wl)
1726 {
1727         ieee80211_unregister_hw(wl->hw);
1728
1729         wl1251_debugfs_exit(wl);
1730
1731         kfree(wl->target_mem_map);
1732         kfree(wl->data_path);
1733         vfree(wl->fw);
1734         wl->fw = NULL;
1735         kfree(wl->nvs);
1736         wl->nvs = NULL;
1737
1738         kfree(wl->rx_descriptor);
1739         wl->rx_descriptor = NULL;
1740
1741         ieee80211_free_hw(wl->hw);
1742
1743         if (wl->eeprom_dump != NULL)
1744                 kfree(wl->eeprom_dump);
1745
1746         return 0;
1747 }
1748 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1749
1750 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1751 MODULE_LICENSE("GPL");
1752 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1753 MODULE_FIRMWARE(WL1251_FW_NAME);