drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  * Copyright (c) 2013 Hauke Mehrtens <hauke@hauke-m.de>
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  12  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  14  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  15  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #define __UNDEF_NO_VERSION__
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/etherdevice.h>
  22 #include <linux/sched.h>
  23 #include <linux/firmware.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/module.h>
  26 #include <linux/bcma/bcma.h>
  27 #include <net/mac80211.h>
  28 #include <defs.h>
  29 #include "phy/phy_int.h"
  30 #include "d11.h"
  31 #include "channel.h"
  32 #include "scb.h"
  33 #include "pub.h"
  34 #include "ucode_loader.h"
  35 #include "mac80211_if.h"
  36 #include "main.h"
  37 #include "debug.h"
  38 #include "led.h"
  39
  40 #define N_TX_QUEUES     4 /* #tx queues on mac80211<->driver interface */
  41 #define BRCMS_FLUSH_TIMEOUT     500 /* msec */
  42
  43 /* Flags we support */
  44 #define MAC_FILTERS (FIF_PROMISC_IN_BSS | \
  45         FIF_ALLMULTI | \
  46         FIF_FCSFAIL | \
  47         FIF_CONTROL | \
  48         FIF_OTHER_BSS | \
  49         FIF_BCN_PRBRESP_PROMISC | \
  50         FIF_PSPOLL)
  51
  52 #define CHAN2GHZ(channel, freqency, chflags)  { \
  53         .band = IEEE80211_BAND_2GHZ, \
  54         .center_freq = (freqency), \
  55         .hw_value = (channel), \
  56         .flags = chflags, \
  57         .max_antenna_gain = 0, \
  58         .max_power = 19, \
  59 }
  60
  61 #define CHAN5GHZ(channel, chflags)  { \
  62         .band = IEEE80211_BAND_5GHZ, \
  63         .center_freq = 5000 + 5*(channel), \
  64         .hw_value = (channel), \
  65         .flags = chflags, \
  66         .max_antenna_gain = 0, \
  67         .max_power = 21, \
  68 }
  69
  70 #define RATE(rate100m, _flags) { \
  71         .bitrate = (rate100m), \
  72         .flags = (_flags), \
  73         .hw_value = (rate100m / 5), \
  74 }
  75
  76 struct firmware_hdr {
  77         __le32 offset;
  78         __le32 len;
  79         __le32 idx;
  80 };
  81
  82 static const char * const brcms_firmwares[MAX_FW_IMAGES] = {
  83         "brcm/bcm43xx",
  84         NULL
  85 };
  86
  87 static int n_adapters_found;
  88
  89 MODULE_AUTHOR("Broadcom Corporation");
  90 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver.");
  91 MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
  92 MODULE_LICENSE("Dual BSD/GPL");
  93 /* This needs to be adjusted when brcms_firmwares changes */
  94 MODULE_FIRMWARE("brcm/bcm43xx-0.fw");
  95 MODULE_FIRMWARE("brcm/bcm43xx_hdr-0.fw");
  96
  97 /* recognized BCMA Core IDs */
  98 static struct bcma_device_id brcms_coreid_table[] = {
  99         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 17, BCMA_ANY_CLASS),
 100         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 23, BCMA_ANY_CLASS),
 101         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 24, BCMA_ANY_CLASS),
 102         BCMA_CORETABLE_END
 103 };
 104 MODULE_DEVICE_TABLE(bcma, brcms_coreid_table);
 105
 106 #if defined(CONFIG_BRCMDBG)
 107 /*
 108  * Module parameter for setting the debug message level. Available
 109  * flags are specified by the BRCM_DL_* macros in
 110  * drivers/net/wireless/brcm80211/include/defs.h.
 111  */
 112 module_param_named(debug, brcm_msg_level, uint, S_IRUGO | S_IWUSR);
 113 #endif
 114
 115 static struct ieee80211_channel brcms_2ghz_chantable[] = {
 116         CHAN2GHZ(1, 2412, IEEE80211_CHAN_NO_HT40MINUS),
 117         CHAN2GHZ(2, 2417, IEEE80211_CHAN_NO_HT40MINUS),
 118         CHAN2GHZ(3, 2422, IEEE80211_CHAN_NO_HT40MINUS),
 119         CHAN2GHZ(4, 2427, IEEE80211_CHAN_NO_HT40MINUS),
 120         CHAN2GHZ(5, 2432, 0),
 121         CHAN2GHZ(6, 2437, 0),
 122         CHAN2GHZ(7, 2442, 0),
 123         CHAN2GHZ(8, 2447, IEEE80211_CHAN_NO_HT40PLUS),
 124         CHAN2GHZ(9, 2452, IEEE80211_CHAN_NO_HT40PLUS),
 125         CHAN2GHZ(10, 2457, IEEE80211_CHAN_NO_HT40PLUS),
 126         CHAN2GHZ(11, 2462, IEEE80211_CHAN_NO_HT40PLUS),
 127         CHAN2GHZ(12, 2467,
 128                  IEEE80211_CHAN_NO_IR |
 129                  IEEE80211_CHAN_NO_HT40PLUS),
 130         CHAN2GHZ(13, 2472,
 131                  IEEE80211_CHAN_NO_IR |
 132                  IEEE80211_CHAN_NO_HT40PLUS),
 133         CHAN2GHZ(14, 2484,
 134                  IEEE80211_CHAN_NO_IR |
 135                  IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
 136                  IEEE80211_CHAN_NO_OFDM)
 137 };
 138
 139 static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
 140         /* UNII-1 */
 141         CHAN5GHZ(36, IEEE80211_CHAN_NO_HT40MINUS),
 142         CHAN5GHZ(40, IEEE80211_CHAN_NO_HT40PLUS),
 143         CHAN5GHZ(44, IEEE80211_CHAN_NO_HT40MINUS),
 144         CHAN5GHZ(48, IEEE80211_CHAN_NO_HT40PLUS),
 145         /* UNII-2 */
 146         CHAN5GHZ(52,
 147                  IEEE80211_CHAN_RADAR |
 148                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 149         CHAN5GHZ(56,
 150                  IEEE80211_CHAN_RADAR |
 151                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 152         CHAN5GHZ(60,
 153                  IEEE80211_CHAN_RADAR |
 154                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 155         CHAN5GHZ(64,
 156                  IEEE80211_CHAN_RADAR |
 157                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 158         /* MID */
 159         CHAN5GHZ(100,
 160                  IEEE80211_CHAN_RADAR |
 161                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 162         CHAN5GHZ(104,
 163                  IEEE80211_CHAN_RADAR |
 164                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 165         CHAN5GHZ(108,
 166                  IEEE80211_CHAN_RADAR |
 167                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 168         CHAN5GHZ(112,
 169                  IEEE80211_CHAN_RADAR |
 170                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 171         CHAN5GHZ(116,
 172                  IEEE80211_CHAN_RADAR |
 173                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 174         CHAN5GHZ(120,
 175                  IEEE80211_CHAN_RADAR |
 176                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 177         CHAN5GHZ(124,
 178                  IEEE80211_CHAN_RADAR |
 179                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 180         CHAN5GHZ(128,
 181                  IEEE80211_CHAN_RADAR |
 182                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 183         CHAN5GHZ(132,
 184                  IEEE80211_CHAN_RADAR |
 185                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
 186         CHAN5GHZ(136,
 187                  IEEE80211_CHAN_RADAR |
 188                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
 189         CHAN5GHZ(140,
 190                  IEEE80211_CHAN_RADAR |
 191                  IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS |
 192                  IEEE80211_CHAN_NO_HT40MINUS),
 193         /* UNII-3 */
 194         CHAN5GHZ(149, IEEE80211_CHAN_NO_HT40MINUS),
 195         CHAN5GHZ(153, IEEE80211_CHAN_NO_HT40PLUS),
 196         CHAN5GHZ(157, IEEE80211_CHAN_NO_HT40MINUS),
 197         CHAN5GHZ(161, IEEE80211_CHAN_NO_HT40PLUS),
 198         CHAN5GHZ(165, IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)
 199 };
 200
 201 /*
 202  * The rate table is used for both 2.4G and 5G rates. The
 203  * latter being a subset as it does not support CCK rates.
 204  */
 205 static struct ieee80211_rate legacy_ratetable[] = {
 206         RATE(10, 0),
 207         RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
 208         RATE(55, IEEE80211_RATE_SHORT_PREAMBLE),
 209         RATE(110, IEEE80211_RATE_SHORT_PREAMBLE),
 210         RATE(60, 0),
 211         RATE(90, 0),
 212         RATE(120, 0),
 213         RATE(180, 0),
 214         RATE(240, 0),
 215         RATE(360, 0),
 216         RATE(480, 0),
 217         RATE(540, 0),
 218 };
 219
 220 static const struct ieee80211_supported_band brcms_band_2GHz_nphy_template = {
 221         .band = IEEE80211_BAND_2GHZ,
 222         .channels = brcms_2ghz_chantable,
 223         .n_channels = ARRAY_SIZE(brcms_2ghz_chantable),
 224         .bitrates = legacy_ratetable,
 225         .n_bitrates = ARRAY_SIZE(legacy_ratetable),
 226         .ht_cap = {
 227                    /* from include/linux/ieee80211.h */
 228                    .cap = IEEE80211_HT_CAP_GRN_FLD |
 229                           IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40,
 230                    .ht_supported = true,
 231                    .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
 232                    .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
 233                    .mcs = {
 234                            /* placeholders for now */
 235                            .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
 236                            .rx_highest = cpu_to_le16(500),
 237                            .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
 238                    }
 239 };
 240
 241 static const struct ieee80211_supported_band brcms_band_5GHz_nphy_template = {
 242         .band = IEEE80211_BAND_5GHZ,
 243         .channels = brcms_5ghz_nphy_chantable,
 244         .n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
 245         .bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
 246         .n_bitrates = ARRAY_SIZE(legacy_ratetable) -
 247                         BRCMS_LEGACY_5G_RATE_OFFSET,
 248         .ht_cap = {
 249                    .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
 250                           IEEE80211_HT_CAP_SGI_40,
 251                    .ht_supported = true,
 252                    .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
 253                    .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
 254                    .mcs = {
 255                            /* placeholders for now */
 256                            .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
 257                            .rx_highest = cpu_to_le16(500),
 258                            .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
 259                    }
 260 };
 261
 262 /* flags the given rate in rateset as requested */
 263 static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
 264 {
 265         u32 i;
 266
 267         for (i = 0; i < rs->count; i++) {
 268                 if (rate != (rs->rates[i] & 0x7f))
 269                         continue;
 270
 271                 if (is_br)
 272                         rs->rates[i] |= BRCMS_RATE_FLAG;
 273                 else
 274                         rs->rates[i] &= BRCMS_RATE_MASK;
 275                 return;
 276         }
 277 }
 278
 279 /**
 280  * This function frees the WL per-device resources.
 281  *
 282  * This function frees resources owned by the WL device pointed to
 283  * by the wl parameter.
 284  *
 285  * precondition: can both be called locked and unlocked
 286  *
 287  */
 288 static void brcms_free(struct brcms_info *wl)
 289 {
 290         struct brcms_timer *t, *next;
 291
 292         /* free ucode data */
 293         if (wl->fw.fw_cnt)
 294                 brcms_ucode_data_free(&wl->ucode);
 295         if (wl->irq)
 296                 free_irq(wl->irq, wl);
 297
 298         /* kill dpc */
 299         tasklet_kill(&wl->tasklet);
 300
 301         if (wl->pub) {
 302                 brcms_debugfs_detach(wl->pub);
 303                 brcms_c_module_unregister(wl->pub, "linux", wl);
 304         }
 305
 306         /* free common resources */
 307         if (wl->wlc) {
 308                 brcms_c_detach(wl->wlc);
 309                 wl->wlc = NULL;
 310                 wl->pub = NULL;
 311         }
 312
 313         /* virtual interface deletion is deferred so we cannot spinwait */
 314
 315         /* wait for all pending callbacks to complete */
 316         while (atomic_read(&wl->callbacks) > 0)
 317                 schedule();
 318
 319         /* free timers */
 320         for (t = wl->timers; t; t = next) {
 321                 next = t->next;
 322 #ifdef DEBUG
 323                 kfree(t->name);
 324 #endif
 325                 kfree(t);
 326         }
 327 }
 328
 329 /*
 330 * called from both kernel as from this kernel module (error flow on attach)
 331 * precondition: perimeter lock is not acquired.
 332 */
 333 static void brcms_remove(struct bcma_device *pdev)
 334 {
 335         struct ieee80211_hw *hw = bcma_get_drvdata(pdev);
 336         struct brcms_info *wl = hw->priv;
 337
 338         if (wl->wlc) {
 339                 brcms_led_unregister(wl);
 340                 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
 341                 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
 342                 ieee80211_unregister_hw(hw);
 343         }
 344
 345         brcms_free(wl);
 346
 347         bcma_set_drvdata(pdev, NULL);
 348         ieee80211_free_hw(hw);
 349 }
 350
 351 /*
 352  * Precondition: Since this function is called in brcms_pci_probe() context,
 353  * no locking is required.
 354  */
 355 static void brcms_release_fw(struct brcms_info *wl)
 356 {
 357         int i;
 358         for (i = 0; i < MAX_FW_IMAGES; i++) {
 359                 release_firmware(wl->fw.fw_bin[i]);
 360                 release_firmware(wl->fw.fw_hdr[i]);
 361         }
 362 }
 363
 364 /*
 365  * Precondition: Since this function is called in brcms_pci_probe() context,
 366  * no locking is required.
 367  */
 368 static int brcms_request_fw(struct brcms_info *wl, struct bcma_device *pdev)
 369 {
 370         int status;
 371         struct device *device = &pdev->dev;
 372         char fw_name[100];
 373         int i;
 374
 375         memset(&wl->fw, 0, sizeof(struct brcms_firmware));
 376         for (i = 0; i < MAX_FW_IMAGES; i++) {
 377                 if (brcms_firmwares[i] == NULL)
 378                         break;
 379                 sprintf(fw_name, "%s-%d.fw", brcms_firmwares[i],
 380                         UCODE_LOADER_API_VER);
 381                 status = request_firmware(&wl->fw.fw_bin[i], fw_name, device);
 382                 if (status) {
 383                         wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
 384                                   KBUILD_MODNAME, fw_name);
 385                         return status;
 386                 }
 387                 sprintf(fw_name, "%s_hdr-%d.fw", brcms_firmwares[i],
 388                         UCODE_LOADER_API_VER);
 389                 status = request_firmware(&wl->fw.fw_hdr[i], fw_name, device);
 390                 if (status) {
 391                         wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
 392                                   KBUILD_MODNAME, fw_name);
 393                         return status;
 394                 }
 395                 wl->fw.hdr_num_entries[i] =
 396                     wl->fw.fw_hdr[i]->size / (sizeof(struct firmware_hdr));
 397         }
 398         wl->fw.fw_cnt = i;
 399         status = brcms_ucode_data_init(wl, &wl->ucode);
 400         brcms_release_fw(wl);
 401         return status;
 402 }
 403
 404 static void brcms_ops_tx(struct ieee80211_hw *hw,
 405                          struct ieee80211_tx_control *control,
 406                          struct sk_buff *skb)
 407 {
 408         struct brcms_info *wl = hw->priv;
 409         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 410
 411         spin_lock_bh(&wl->lock);
 412         if (!wl->pub->up) {
 413                 brcms_err(wl->wlc->hw->d11core, "ops->tx called while down\n");
 414                 kfree_skb(skb);
 415                 goto done;
 416         }
 417         if (brcms_c_sendpkt_mac80211(wl->wlc, skb, hw))
 418                 tx_info->rate_driver_data[0] = control->sta;
 419  done:
 420         spin_unlock_bh(&wl->lock);
 421 }
 422
 423 static int brcms_ops_start(struct ieee80211_hw *hw)
 424 {
 425         struct brcms_info *wl = hw->priv;
 426         bool blocked;
 427         int err;
 428
 429         ieee80211_wake_queues(hw);
 430         spin_lock_bh(&wl->lock);
 431         blocked = brcms_rfkill_set_hw_state(wl);
 432         spin_unlock_bh(&wl->lock);
 433         if (!blocked)
 434                 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
 435
 436         if (!wl->ucode.bcm43xx_bomminor) {
 437                 err = brcms_request_fw(wl, wl->wlc->hw->d11core);
 438                 if (err) {
 439                         brcms_remove(wl->wlc->hw->d11core);
 440                         return -ENOENT;
 441                 }
 442         }
 443
 444         spin_lock_bh(&wl->lock);
 445         /* avoid acknowledging frames before a non-monitor device is added */
 446         wl->mute_tx = true;
 447
 448         if (!wl->pub->up)
 449                 if (!blocked)
 450                         err = brcms_up(wl);
 451                 else
 452                         err = -ERFKILL;
 453         else
 454                 err = -ENODEV;
 455         spin_unlock_bh(&wl->lock);
 456
 457         if (err != 0)
 458                 brcms_err(wl->wlc->hw->d11core, "%s: brcms_up() returned %d\n",
 459                           __func__, err);
 460
 461         bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, true);
 462         return err;
 463 }
 464
 465 static void brcms_ops_stop(struct ieee80211_hw *hw)
 466 {
 467         struct brcms_info *wl = hw->priv;
 468         int status;
 469
 470         ieee80211_stop_queues(hw);
 471
 472         if (wl->wlc == NULL)
 473                 return;
 474
 475         spin_lock_bh(&wl->lock);
 476         status = brcms_c_chipmatch(wl->wlc->hw->d11core);
 477         spin_unlock_bh(&wl->lock);
 478         if (!status) {
 479                 brcms_err(wl->wlc->hw->d11core,
 480                           "wl: brcms_ops_stop: chipmatch failed\n");
 481                 return;
 482         }
 483
 484         bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, false);
 485
 486         /* put driver in down state */
 487         spin_lock_bh(&wl->lock);
 488         brcms_down(wl);
 489         spin_unlock_bh(&wl->lock);
 490 }
 491
 492 static int
 493 brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 494 {
 495         struct brcms_info *wl = hw->priv;
 496
 497         /* Just STA, AP and ADHOC for now */
 498         if (vif->type != NL80211_IFTYPE_STATION &&
 499             vif->type != NL80211_IFTYPE_AP &&
 500             vif->type != NL80211_IFTYPE_ADHOC) {
 501                 brcms_err(wl->wlc->hw->d11core,
 502                           "%s: Attempt to add type %d, only STA, AP and AdHoc for now\n",
 503                           __func__, vif->type);
 504                 return -EOPNOTSUPP;
 505         }
 506
 507         spin_lock_bh(&wl->lock);
 508         wl->mute_tx = false;
 509         brcms_c_mute(wl->wlc, false);
 510         if (vif->type == NL80211_IFTYPE_STATION)
 511                 brcms_c_start_station(wl->wlc, vif->addr);
 512         else if (vif->type == NL80211_IFTYPE_AP)
 513                 brcms_c_start_ap(wl->wlc, vif->addr, vif->bss_conf.bssid,
 514                                  vif->bss_conf.ssid, vif->bss_conf.ssid_len);
 515         else if (vif->type == NL80211_IFTYPE_ADHOC)
 516                 brcms_c_start_adhoc(wl->wlc, vif->addr);
 517         spin_unlock_bh(&wl->lock);
 518
 519         return 0;
 520 }
 521
 522 static void
 523 brcms_ops_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 524 {
 525 }
 526
 527 static int brcms_ops_config(struct ieee80211_hw *hw, u32 changed)
 528 {
 529         struct ieee80211_conf *conf = &hw->conf;
 530         struct brcms_info *wl = hw->priv;
 531         struct bcma_device *core = wl->wlc->hw->d11core;
 532         int err = 0;
 533         int new_int;
 534
 535         spin_lock_bh(&wl->lock);
 536         if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
 537                 brcms_c_set_beacon_listen_interval(wl->wlc,
 538                                                    conf->listen_interval);
 539         }
 540         if (changed & IEEE80211_CONF_CHANGE_MONITOR)
 541                 brcms_dbg_info(core, "%s: change monitor mode: %s\n",
 542                                __func__, conf->flags & IEEE80211_CONF_MONITOR ?
 543                                "true" : "false");
 544         if (changed & IEEE80211_CONF_CHANGE_PS)
 545                 brcms_err(core, "%s: change power-save mode: %s (implement)\n",
 546                           __func__, conf->flags & IEEE80211_CONF_PS ?
 547                           "true" : "false");
 548
 549         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 550                 err = brcms_c_set_tx_power(wl->wlc, conf->power_level);
 551                 if (err < 0) {
 552                         brcms_err(core, "%s: Error setting power_level\n",
 553                                   __func__);
 554                         goto config_out;
 555                 }
 556                 new_int = brcms_c_get_tx_power(wl->wlc);
 557                 if (new_int != conf->power_level)
 558                         brcms_err(core,
 559                                   "%s: Power level req != actual, %d %d\n",
 560                                   __func__, conf->power_level,
 561                                   new_int);
 562         }
 563         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 564                 if (conf->chandef.width == NL80211_CHAN_WIDTH_20 ||
 565                     conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
 566                         err = brcms_c_set_channel(wl->wlc,
 567                                                   conf->chandef.chan->hw_value);
 568                 else
 569                         err = -ENOTSUPP;
 570         }
 571         if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
 572                 err = brcms_c_set_rate_limit(wl->wlc,
 573                                              conf->short_frame_max_tx_count,
 574                                              conf->long_frame_max_tx_count);
 575
 576  config_out:
 577         spin_unlock_bh(&wl->lock);
 578         return err;
 579 }
 580
 581 static void
 582 brcms_ops_bss_info_changed(struct ieee80211_hw *hw,
 583                         struct ieee80211_vif *vif,
 584                         struct ieee80211_bss_conf *info, u32 changed)
 585 {
 586         struct brcms_info *wl = hw->priv;
 587         struct bcma_device *core = wl->wlc->hw->d11core;
 588
 589         if (changed & BSS_CHANGED_ASSOC) {
 590                 /* association status changed (associated/disassociated)
 591                  * also implies a change in the AID.
 592                  */
 593                 brcms_err(core, "%s: %s: %sassociated\n", KBUILD_MODNAME,
 594                           __func__, info->assoc ? "" : "dis");
 595                 spin_lock_bh(&wl->lock);
 596                 brcms_c_associate_upd(wl->wlc, info->assoc);
 597                 spin_unlock_bh(&wl->lock);
 598         }
 599         if (changed & BSS_CHANGED_ERP_SLOT) {
 600                 s8 val;
 601
 602                 /* slot timing changed */
 603                 if (info->use_short_slot)
 604                         val = 1;
 605                 else
 606                         val = 0;
 607                 spin_lock_bh(&wl->lock);
 608                 brcms_c_set_shortslot_override(wl->wlc, val);
 609                 spin_unlock_bh(&wl->lock);
 610         }
 611
 612         if (changed & BSS_CHANGED_HT) {
 613                 /* 802.11n parameters changed */
 614                 u16 mode = info->ht_operation_mode;
 615
 616                 spin_lock_bh(&wl->lock);
 617                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_CFG,
 618                         mode & IEEE80211_HT_OP_MODE_PROTECTION);
 619                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_NONGF,
 620                         mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 621                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_OBSS,
 622                         mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
 623                 spin_unlock_bh(&wl->lock);
 624         }
 625         if (changed & BSS_CHANGED_BASIC_RATES) {
 626                 struct ieee80211_supported_band *bi;
 627                 u32 br_mask, i;
 628                 u16 rate;
 629                 struct brcm_rateset rs;
 630                 int error;
 631
 632                 /* retrieve the current rates */
 633                 spin_lock_bh(&wl->lock);
 634                 brcms_c_get_current_rateset(wl->wlc, &rs);
 635                 spin_unlock_bh(&wl->lock);
 636
 637                 br_mask = info->basic_rates;
 638                 bi = hw->wiphy->bands[brcms_c_get_curband(wl->wlc)];
 639                 for (i = 0; i < bi->n_bitrates; i++) {
 640                         /* convert to internal rate value */
 641                         rate = (bi->bitrates[i].bitrate << 1) / 10;
 642
 643                         /* set/clear basic rate flag */
 644                         brcms_set_basic_rate(&rs, rate, br_mask & 1);
 645                         br_mask >>= 1;
 646                 }
 647
 648                 /* update the rate set */
 649                 spin_lock_bh(&wl->lock);
 650                 error = brcms_c_set_rateset(wl->wlc, &rs);
 651                 spin_unlock_bh(&wl->lock);
 652                 if (error)
 653                         brcms_err(core, "changing basic rates failed: %d\n",
 654                                   error);
 655         }
 656         if (changed & BSS_CHANGED_BEACON_INT) {
 657                 /* Beacon interval changed */
 658                 spin_lock_bh(&wl->lock);
 659                 brcms_c_set_beacon_period(wl->wlc, info->beacon_int);
 660                 spin_unlock_bh(&wl->lock);
 661         }
 662         if (changed & BSS_CHANGED_BSSID) {
 663                 /* BSSID changed, for whatever reason (IBSS and managed mode) */
 664                 spin_lock_bh(&wl->lock);
 665                 brcms_c_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid);
 666                 spin_unlock_bh(&wl->lock);
 667         }
 668         if (changed & BSS_CHANGED_SSID) {
 669                 /* BSSID changed, for whatever reason (IBSS and managed mode) */
 670                 spin_lock_bh(&wl->lock);
 671                 brcms_c_set_ssid(wl->wlc, info->ssid, info->ssid_len);
 672                 spin_unlock_bh(&wl->lock);
 673         }
 674         if (changed & BSS_CHANGED_BEACON) {
 675                 /* Beacon data changed, retrieve new beacon (beaconing modes) */
 676                 struct sk_buff *beacon;
 677                 u16 tim_offset = 0;
 678
 679                 spin_lock_bh(&wl->lock);
 680                 beacon = ieee80211_beacon_get_tim(hw, vif, &tim_offset, NULL);
 681                 brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
 682                                        info->dtim_period);
 683                 spin_unlock_bh(&wl->lock);
 684         }
 685
 686         if (changed & BSS_CHANGED_AP_PROBE_RESP) {
 687                 struct sk_buff *probe_resp;
 688
 689                 spin_lock_bh(&wl->lock);
 690                 probe_resp = ieee80211_proberesp_get(hw, vif);
 691                 brcms_c_set_new_probe_resp(wl->wlc, probe_resp);
 692                 spin_unlock_bh(&wl->lock);
 693         }
 694
 695         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 696                 /* Beaconing should be enabled/disabled (beaconing modes) */
 697                 brcms_err(core, "%s: Beacon enabled: %s\n", __func__,
 698                           info->enable_beacon ? "true" : "false");
 699                 if (info->enable_beacon &&
 700                     hw->wiphy->flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) {
 701                         brcms_c_enable_probe_resp(wl->wlc, true);
 702                 } else {
 703                         brcms_c_enable_probe_resp(wl->wlc, false);
 704                 }
 705         }
 706
 707         if (changed & BSS_CHANGED_CQM) {
 708                 /* Connection quality monitor config changed */
 709                 brcms_err(core, "%s: cqm change: threshold %d, hys %d "
 710                           " (implement)\n", __func__, info->cqm_rssi_thold,
 711                           info->cqm_rssi_hyst);
 712         }
 713
 714         if (changed & BSS_CHANGED_IBSS) {
 715                 /* IBSS join status changed */
 716                 brcms_err(core, "%s: IBSS joined: %s (implement)\n",
 717                           __func__, info->ibss_joined ? "true" : "false");
 718         }
 719
 720         if (changed & BSS_CHANGED_ARP_FILTER) {
 721                 /* Hardware ARP filter address list or state changed */
 722                 brcms_err(core, "%s: arp filtering: %d addresses"
 723                           " (implement)\n", __func__, info->arp_addr_cnt);
 724         }
 725
 726         if (changed & BSS_CHANGED_QOS) {
 727                 /*
 728                  * QoS for this association was enabled/disabled.
 729                  * Note that it is only ever disabled for station mode.
 730                  */
 731                 brcms_err(core, "%s: qos enabled: %s (implement)\n",
 732                           __func__, info->qos ? "true" : "false");
 733         }
 734         return;
 735 }
 736
 737 static void
 738 brcms_ops_configure_filter(struct ieee80211_hw *hw,
 739                         unsigned int changed_flags,
 740                         unsigned int *total_flags, u64 multicast)
 741 {
 742         struct brcms_info *wl = hw->priv;
 743         struct bcma_device *core = wl->wlc->hw->d11core;
 744
 745         changed_flags &= MAC_FILTERS;
 746         *total_flags &= MAC_FILTERS;
 747
 748         if (changed_flags & FIF_PROMISC_IN_BSS)
 749                 brcms_dbg_info(core, "FIF_PROMISC_IN_BSS\n");
 750         if (changed_flags & FIF_ALLMULTI)
 751                 brcms_dbg_info(core, "FIF_ALLMULTI\n");
 752         if (changed_flags & FIF_FCSFAIL)
 753                 brcms_dbg_info(core, "FIF_FCSFAIL\n");
 754         if (changed_flags & FIF_CONTROL)
 755                 brcms_dbg_info(core, "FIF_CONTROL\n");
 756         if (changed_flags & FIF_OTHER_BSS)
 757                 brcms_dbg_info(core, "FIF_OTHER_BSS\n");
 758         if (changed_flags & FIF_PSPOLL)
 759                 brcms_dbg_info(core, "FIF_PSPOLL\n");
 760         if (changed_flags & FIF_BCN_PRBRESP_PROMISC)
 761                 brcms_dbg_info(core, "FIF_BCN_PRBRESP_PROMISC\n");
 762
 763         spin_lock_bh(&wl->lock);
 764         brcms_c_mac_promisc(wl->wlc, *total_flags);
 765         spin_unlock_bh(&wl->lock);
 766         return;
 767 }
 768
 769 static void brcms_ops_sw_scan_start(struct ieee80211_hw *hw)
 770 {
 771         struct brcms_info *wl = hw->priv;
 772         spin_lock_bh(&wl->lock);
 773         brcms_c_scan_start(wl->wlc);
 774         spin_unlock_bh(&wl->lock);
 775         return;
 776 }
 777
 778 static void brcms_ops_sw_scan_complete(struct ieee80211_hw *hw)
 779 {
 780         struct brcms_info *wl = hw->priv;
 781         spin_lock_bh(&wl->lock);
 782         brcms_c_scan_stop(wl->wlc);
 783         spin_unlock_bh(&wl->lock);
 784         return;
 785 }
 786
 787 static int
 788 brcms_ops_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
 789                   const struct ieee80211_tx_queue_params *params)
 790 {
 791         struct brcms_info *wl = hw->priv;
 792
 793         spin_lock_bh(&wl->lock);
 794         brcms_c_wme_setparams(wl->wlc, queue, params, true);
 795         spin_unlock_bh(&wl->lock);
 796
 797         return 0;
 798 }
 799
 800 static int
 801 brcms_ops_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 802                struct ieee80211_sta *sta)
 803 {
 804         struct brcms_info *wl = hw->priv;
 805         struct scb *scb = &wl->wlc->pri_scb;
 806
 807         brcms_c_init_scb(scb);
 808
 809         wl->pub->global_ampdu = &(scb->scb_ampdu);
 810         wl->pub->global_ampdu->scb = scb;
 811         wl->pub->global_ampdu->max_pdu = 16;
 812
 813         /*
 814          * minstrel_ht initiates addBA on our behalf by calling
 815          * ieee80211_start_tx_ba_session()
 816          */
 817         return 0;
 818 }
 819
 820 static int
 821 brcms_ops_ampdu_action(struct ieee80211_hw *hw,
 822                     struct ieee80211_vif *vif,
 823                     enum ieee80211_ampdu_mlme_action action,
 824                     struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 825                     u8 buf_size)
 826 {
 827         struct brcms_info *wl = hw->priv;
 828         struct scb *scb = &wl->wlc->pri_scb;
 829         int status;
 830
 831         if (WARN_ON(scb->magic != SCB_MAGIC))
 832                 return -EIDRM;
 833         switch (action) {
 834         case IEEE80211_AMPDU_RX_START:
 835                 break;
 836         case IEEE80211_AMPDU_RX_STOP:
 837                 break;
 838         case IEEE80211_AMPDU_TX_START:
 839                 spin_lock_bh(&wl->lock);
 840                 status = brcms_c_aggregatable(wl->wlc, tid);
 841                 spin_unlock_bh(&wl->lock);
 842                 if (!status) {
 843                         brcms_err(wl->wlc->hw->d11core,
 844                                   "START: tid %d is not agg\'able\n", tid);
 845                         return -EINVAL;
 846                 }
 847                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 848                 break;
 849
 850         case IEEE80211_AMPDU_TX_STOP_CONT:
 851         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 852         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 853                 spin_lock_bh(&wl->lock);
 854                 brcms_c_ampdu_flush(wl->wlc, sta, tid);
 855                 spin_unlock_bh(&wl->lock);
 856                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 857                 break;
 858         case IEEE80211_AMPDU_TX_OPERATIONAL:
 859                 /*
 860                  * BA window size from ADDBA response ('buf_size') defines how
 861                  * many outstanding MPDUs are allowed for the BA stream by
 862                  * recipient and traffic class. 'ampdu_factor' gives maximum
 863                  * AMPDU size.
 864                  */
 865                 spin_lock_bh(&wl->lock);
 866                 brcms_c_ampdu_tx_operational(wl->wlc, tid, buf_size,
 867                         (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 868                          sta->ht_cap.ampdu_factor)) - 1);
 869                 spin_unlock_bh(&wl->lock);
 870                 /* Power save wakeup */
 871                 break;
 872         default:
 873                 brcms_err(wl->wlc->hw->d11core,
 874                           "%s: Invalid command, ignoring\n", __func__);
 875         }
 876
 877         return 0;
 878 }
 879
 880 static void brcms_ops_rfkill_poll(struct ieee80211_hw *hw)
 881 {
 882         struct brcms_info *wl = hw->priv;
 883         bool blocked;
 884
 885         spin_lock_bh(&wl->lock);
 886         blocked = brcms_c_check_radio_disabled(wl->wlc);
 887         spin_unlock_bh(&wl->lock);
 888
 889         wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
 890 }
 891
 892 static bool brcms_tx_flush_completed(struct brcms_info *wl)
 893 {
 894         bool result;
 895
 896         spin_lock_bh(&wl->lock);
 897         result = brcms_c_tx_flush_completed(wl->wlc);
 898         spin_unlock_bh(&wl->lock);
 899         return result;
 900 }
 901
 902 static void brcms_ops_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 903 {
 904         struct brcms_info *wl = hw->priv;
 905         int ret;
 906
 907         no_printk("%s: drop = %s\n", __func__, drop ? "true" : "false");
 908
 909         ret = wait_event_timeout(wl->tx_flush_wq,
 910                                  brcms_tx_flush_completed(wl),
 911                                  msecs_to_jiffies(BRCMS_FLUSH_TIMEOUT));
 912
 913         brcms_dbg_mac80211(wl->wlc->hw->d11core,
 914                            "ret=%d\n", jiffies_to_msecs(ret));
 915 }
 916
 917 static u64 brcms_ops_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 918 {
 919         struct brcms_info *wl = hw->priv;
 920         u64 tsf;
 921
 922         spin_lock_bh(&wl->lock);
 923         tsf = brcms_c_tsf_get(wl->wlc);
 924         spin_unlock_bh(&wl->lock);
 925
 926         return tsf;
 927 }
 928
 929 static void brcms_ops_set_tsf(struct ieee80211_hw *hw,
 930                            struct ieee80211_vif *vif, u64 tsf)
 931 {
 932         struct brcms_info *wl = hw->priv;
 933
 934         spin_lock_bh(&wl->lock);
 935         brcms_c_tsf_set(wl->wlc, tsf);
 936         spin_unlock_bh(&wl->lock);
 937 }
 938
 939 static const struct ieee80211_ops brcms_ops = {
 940         .tx = brcms_ops_tx,
 941         .start = brcms_ops_start,
 942         .stop = brcms_ops_stop,
 943         .add_interface = brcms_ops_add_interface,
 944         .remove_interface = brcms_ops_remove_interface,
 945         .config = brcms_ops_config,
 946         .bss_info_changed = brcms_ops_bss_info_changed,
 947         .configure_filter = brcms_ops_configure_filter,
 948         .sw_scan_start = brcms_ops_sw_scan_start,
 949         .sw_scan_complete = brcms_ops_sw_scan_complete,
 950         .conf_tx = brcms_ops_conf_tx,
 951         .sta_add = brcms_ops_sta_add,
 952         .ampdu_action = brcms_ops_ampdu_action,
 953         .rfkill_poll = brcms_ops_rfkill_poll,
 954         .flush = brcms_ops_flush,
 955         .get_tsf = brcms_ops_get_tsf,
 956         .set_tsf = brcms_ops_set_tsf,
 957 };
 958
 959 void brcms_dpc(unsigned long data)
 960 {
 961         struct brcms_info *wl;
 962
 963         wl = (struct brcms_info *) data;
 964
 965         spin_lock_bh(&wl->lock);
 966
 967         /* call the common second level interrupt handler */
 968         if (wl->pub->up) {
 969                 if (wl->resched) {
 970                         unsigned long flags;
 971
 972                         spin_lock_irqsave(&wl->isr_lock, flags);
 973                         brcms_c_intrsupd(wl->wlc);
 974                         spin_unlock_irqrestore(&wl->isr_lock, flags);
 975                 }
 976
 977                 wl->resched = brcms_c_dpc(wl->wlc, true);
 978         }
 979
 980         /* brcms_c_dpc() may bring the driver down */
 981         if (!wl->pub->up)
 982                 goto done;
 983
 984         /* re-schedule dpc */
 985         if (wl->resched)
 986                 tasklet_schedule(&wl->tasklet);
 987         else
 988                 /* re-enable interrupts */
 989                 brcms_intrson(wl);
 990
 991  done:
 992         spin_unlock_bh(&wl->lock);
 993         wake_up(&wl->tx_flush_wq);
 994 }
 995
 996 static irqreturn_t brcms_isr(int irq, void *dev_id)
 997 {
 998         struct brcms_info *wl;
 999         irqreturn_t ret = IRQ_NONE;
1000
1001         wl = (struct brcms_info *) dev_id;
1002
1003         spin_lock(&wl->isr_lock);
1004
1005         /* call common first level interrupt handler */
1006         if (brcms_c_isr(wl->wlc)) {
1007                 /* schedule second level handler */
1008                 tasklet_schedule(&wl->tasklet);
1009                 ret = IRQ_HANDLED;
1010         }
1011
1012         spin_unlock(&wl->isr_lock);
1013
1014         return ret;
1015 }
1016
1017 /*
1018  * is called in brcms_pci_probe() context, therefore no locking required.
1019  */
1020 static int ieee_hw_rate_init(struct ieee80211_hw *hw)
1021 {
1022         struct brcms_info *wl = hw->priv;
1023         struct brcms_c_info *wlc = wl->wlc;
1024         struct ieee80211_supported_band *band;
1025         int has_5g = 0;
1026         u16 phy_type;
1027
1028         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
1029         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
1030
1031         phy_type = brcms_c_get_phy_type(wl->wlc, 0);
1032         if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1033                 band = &wlc->bandstate[BAND_2G_INDEX]->band;
1034                 *band = brcms_band_2GHz_nphy_template;
1035                 if (phy_type == PHY_TYPE_LCN) {
1036                         /* Single stream */
1037                         band->ht_cap.mcs.rx_mask[1] = 0;
1038                         band->ht_cap.mcs.rx_highest = cpu_to_le16(72);
1039                 }
1040                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = band;
1041         } else {
1042                 return -EPERM;
1043         }
1044
1045         /* Assume all bands use the same phy.  True for 11n devices. */
1046         if (wl->pub->_nbands > 1) {
1047                 has_5g++;
1048                 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1049                         band = &wlc->bandstate[BAND_5G_INDEX]->band;
1050                         *band = brcms_band_5GHz_nphy_template;
1051                         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = band;
1052                 } else {
1053                         return -EPERM;
1054                 }
1055         }
1056         return 0;
1057 }
1058
1059 /*
1060  * is called in brcms_pci_probe() context, therefore no locking required.
1061  */
1062 static int ieee_hw_init(struct ieee80211_hw *hw)
1063 {
1064         hw->flags = IEEE80211_HW_SIGNAL_DBM
1065             /* | IEEE80211_HW_CONNECTION_MONITOR  What is this? */
1066             | IEEE80211_HW_REPORTS_TX_ACK_STATUS
1067             | IEEE80211_HW_AMPDU_AGGREGATION;
1068
1069         hw->extra_tx_headroom = brcms_c_get_header_len();
1070         hw->queues = N_TX_QUEUES;
1071         hw->max_rates = 2;      /* Primary rate and 1 fallback rate */
1072
1073         /* channel change time is dependent on chip and band  */
1074         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1075                                      BIT(NL80211_IFTYPE_AP) |
1076                                      BIT(NL80211_IFTYPE_ADHOC);
1077
1078         /*
1079          * deactivate sending probe responses by ucude, because this will
1080          * cause problems when WPS is used.
1081          *
1082          * hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
1083          */
1084
1085         hw->rate_control_algorithm = "minstrel_ht";
1086
1087         hw->sta_data_size = 0;
1088         return ieee_hw_rate_init(hw);
1089 }
1090
1091 /**
1092  * attach to the WL device.
1093  *
1094  * Attach to the WL device identified by vendor and device parameters.
1095  * regs is a host accessible memory address pointing to WL device registers.
1096  *
1097  * brcms_attach is not defined as static because in the case where no bus
1098  * is defined, wl_attach will never be called, and thus, gcc will issue
1099  * a warning that this function is defined but not used if we declare
1100  * it as static.
1101  *
1102  *
1103  * is called in brcms_bcma_probe() context, therefore no locking required.
1104  */
1105 static struct brcms_info *brcms_attach(struct bcma_device *pdev)
1106 {
1107         struct brcms_info *wl = NULL;
1108         int unit, err;
1109         struct ieee80211_hw *hw;
1110         u8 perm[ETH_ALEN];
1111
1112         unit = n_adapters_found;
1113         err = 0;
1114
1115         if (unit < 0)
1116                 return NULL;
1117
1118         /* allocate private info */
1119         hw = bcma_get_drvdata(pdev);
1120         if (hw != NULL)
1121                 wl = hw->priv;
1122         if (WARN_ON(hw == NULL) || WARN_ON(wl == NULL))
1123                 return NULL;
1124         wl->wiphy = hw->wiphy;
1125
1126         atomic_set(&wl->callbacks, 0);
1127
1128         init_waitqueue_head(&wl->tx_flush_wq);
1129
1130         /* setup the bottom half handler */
1131         tasklet_init(&wl->tasklet, brcms_dpc, (unsigned long) wl);
1132
1133         spin_lock_init(&wl->lock);
1134         spin_lock_init(&wl->isr_lock);
1135
1136         /* common load-time initialization */
1137         wl->wlc = brcms_c_attach((void *)wl, pdev, unit, false, &err);
1138         if (!wl->wlc) {
1139                 wiphy_err(wl->wiphy, "%s: attach() failed with code %d\n",
1140                           KBUILD_MODNAME, err);
1141                 goto fail;
1142         }
1143         wl->pub = brcms_c_pub(wl->wlc);
1144
1145         wl->pub->ieee_hw = hw;
1146
1147         /* register our interrupt handler */
1148         if (request_irq(pdev->irq, brcms_isr,
1149                         IRQF_SHARED, KBUILD_MODNAME, wl)) {
1150                 wiphy_err(wl->wiphy, "wl%d: request_irq() failed\n", unit);
1151                 goto fail;
1152         }
1153         wl->irq = pdev->irq;
1154
1155         /* register module */
1156         brcms_c_module_register(wl->pub, "linux", wl, NULL);
1157
1158         if (ieee_hw_init(hw)) {
1159                 wiphy_err(wl->wiphy, "wl%d: %s: ieee_hw_init failed!\n", unit,
1160                           __func__);
1161                 goto fail;
1162         }
1163
1164         brcms_c_regd_init(wl->wlc);
1165
1166         memcpy(perm, &wl->pub->cur_etheraddr, ETH_ALEN);
1167         if (WARN_ON(!is_valid_ether_addr(perm)))
1168                 goto fail;
1169         SET_IEEE80211_PERM_ADDR(hw, perm);
1170
1171         err = ieee80211_register_hw(hw);
1172         if (err)
1173                 wiphy_err(wl->wiphy, "%s: ieee80211_register_hw failed, status"
1174                           "%d\n", __func__, err);
1175
1176         if (wl->pub->srom_ccode[0] &&
1177             regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
1178                 wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);
1179
1180         brcms_debugfs_attach(wl->pub);
1181         brcms_debugfs_create_files(wl->pub);
1182         n_adapters_found++;
1183         return wl;
1184
1185 fail:
1186         brcms_free(wl);
1187         return NULL;
1188 }
1189
1190
1191
1192 /**
1193  * determines if a device is a WL device, and if so, attaches it.
1194  *
1195  * This function determines if a device pointed to by pdev is a WL device,
1196  * and if so, performs a brcms_attach() on it.
1197  *
1198  * Perimeter lock is initialized in the course of this function.
1199  */
1200 static int brcms_bcma_probe(struct bcma_device *pdev)
1201 {
1202         struct brcms_info *wl;
1203         struct ieee80211_hw *hw;
1204
1205         dev_info(&pdev->dev, "mfg %x core %x rev %d class %d irq %d\n",
1206                  pdev->id.manuf, pdev->id.id, pdev->id.rev, pdev->id.class,
1207                  pdev->irq);
1208
1209         if ((pdev->id.manuf != BCMA_MANUF_BCM) ||
1210             (pdev->id.id != BCMA_CORE_80211))
1211                 return -ENODEV;
1212
1213         hw = ieee80211_alloc_hw(sizeof(struct brcms_info), &brcms_ops);
1214         if (!hw) {
1215                 pr_err("%s: ieee80211_alloc_hw failed\n", __func__);
1216                 return -ENOMEM;
1217         }
1218
1219         SET_IEEE80211_DEV(hw, &pdev->dev);
1220
1221         bcma_set_drvdata(pdev, hw);
1222
1223         memset(hw->priv, 0, sizeof(*wl));
1224
1225         wl = brcms_attach(pdev);
1226         if (!wl) {
1227                 pr_err("%s: brcms_attach failed!\n", __func__);
1228                 return -ENODEV;
1229         }
1230         brcms_led_register(wl);
1231
1232         return 0;
1233 }
1234
1235 static int brcms_suspend(struct bcma_device *pdev)
1236 {
1237         struct brcms_info *wl;
1238         struct ieee80211_hw *hw;
1239
1240         hw = bcma_get_drvdata(pdev);
1241         wl = hw->priv;
1242         if (!wl) {
1243                 pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
1244                        __func__);
1245                 return -ENODEV;
1246         }
1247
1248         /* only need to flag hw is down for proper resume */
1249         spin_lock_bh(&wl->lock);
1250         wl->pub->hw_up = false;
1251         spin_unlock_bh(&wl->lock);
1252
1253         brcms_dbg_info(wl->wlc->hw->d11core, "brcms_suspend ok\n");
1254
1255         return 0;
1256 }
1257
1258 static int brcms_resume(struct bcma_device *pdev)
1259 {
1260         return 0;
1261 }
1262
1263 static struct bcma_driver brcms_bcma_driver = {
1264         .name     = KBUILD_MODNAME,
1265         .probe    = brcms_bcma_probe,
1266         .suspend  = brcms_suspend,
1267         .resume   = brcms_resume,
1268         .remove   = brcms_remove,
1269         .id_table = brcms_coreid_table,
1270 };
1271
1272 /**
1273  * This is the main entry point for the brcmsmac driver.
1274  *
1275  * This function is scheduled upon module initialization and
1276  * does the driver registration, which result in brcms_bcma_probe()
1277  * call resulting in the driver bringup.
1278  */
1279 static void brcms_driver_init(struct work_struct *work)
1280 {
1281         int error;
1282
1283         error = bcma_driver_register(&brcms_bcma_driver);
1284         if (error)
1285                 pr_err("%s: register returned %d\n", __func__, error);
1286 }
1287
1288 static DECLARE_WORK(brcms_driver_work, brcms_driver_init);
1289
1290 static int __init brcms_module_init(void)
1291 {
1292         brcms_debugfs_init();
1293         if (!schedule_work(&brcms_driver_work))
1294                 return -EBUSY;
1295
1296         return 0;
1297 }
1298
1299 /**
1300  * This function unloads the brcmsmac driver from the system.
1301  *
1302  * This function unconditionally unloads the brcmsmac driver module from the
1303  * system.
1304  *
1305  */
1306 static void __exit brcms_module_exit(void)
1307 {
1308         cancel_work_sync(&brcms_driver_work);
1309         bcma_driver_unregister(&brcms_bcma_driver);
1310         brcms_debugfs_exit();
1311 }
1312
1313 module_init(brcms_module_init);
1314 module_exit(brcms_module_exit);
1315
1316 /*
1317  * precondition: perimeter lock has been acquired
1318  */
1319 void brcms_txflowcontrol(struct brcms_info *wl, struct brcms_if *wlif,
1320                          bool state, int prio)
1321 {
1322         brcms_err(wl->wlc->hw->d11core, "Shouldn't be here %s\n", __func__);
1323 }
1324
1325 /*
1326  * precondition: perimeter lock has been acquired
1327  */
1328 void brcms_init(struct brcms_info *wl)
1329 {
1330         brcms_dbg_info(wl->wlc->hw->d11core, "Initializing wl%d\n",
1331                        wl->pub->unit);
1332         brcms_reset(wl);
1333         brcms_c_init(wl->wlc, wl->mute_tx);
1334 }
1335
1336 /*
1337  * precondition: perimeter lock has been acquired
1338  */
1339 uint brcms_reset(struct brcms_info *wl)
1340 {
1341         brcms_dbg_info(wl->wlc->hw->d11core, "Resetting wl%d\n", wl->pub->unit);
1342         brcms_c_reset(wl->wlc);
1343
1344         /* dpc will not be rescheduled */
1345         wl->resched = false;
1346
1347         /* inform publicly that interface is down */
1348         wl->pub->up = false;
1349
1350         return 0;
1351 }
1352
1353 void brcms_fatal_error(struct brcms_info *wl)
1354 {
1355         brcms_err(wl->wlc->hw->d11core, "wl%d: fatal error, reinitializing\n",
1356                   wl->wlc->pub->unit);
1357         brcms_reset(wl);
1358         ieee80211_restart_hw(wl->pub->ieee_hw);
1359 }
1360
1361 /*
1362  * These are interrupt on/off entry points. Disable interrupts
1363  * during interrupt state transition.
1364  */
1365 void brcms_intrson(struct brcms_info *wl)
1366 {
1367         unsigned long flags;
1368
1369         spin_lock_irqsave(&wl->isr_lock, flags);
1370         brcms_c_intrson(wl->wlc);
1371         spin_unlock_irqrestore(&wl->isr_lock, flags);
1372 }
1373
1374 u32 brcms_intrsoff(struct brcms_info *wl)
1375 {
1376         unsigned long flags;
1377         u32 status;
1378
1379         spin_lock_irqsave(&wl->isr_lock, flags);
1380         status = brcms_c_intrsoff(wl->wlc);
1381         spin_unlock_irqrestore(&wl->isr_lock, flags);
1382         return status;
1383 }
1384
1385 void brcms_intrsrestore(struct brcms_info *wl, u32 macintmask)
1386 {
1387         unsigned long flags;
1388
1389         spin_lock_irqsave(&wl->isr_lock, flags);
1390         brcms_c_intrsrestore(wl->wlc, macintmask);
1391         spin_unlock_irqrestore(&wl->isr_lock, flags);
1392 }
1393
1394 /*
1395  * precondition: perimeter lock has been acquired
1396  */
1397 int brcms_up(struct brcms_info *wl)
1398 {
1399         int error = 0;
1400
1401         if (wl->pub->up)
1402                 return 0;
1403
1404         error = brcms_c_up(wl->wlc);
1405
1406         return error;
1407 }
1408
1409 /*
1410  * precondition: perimeter lock has been acquired
1411  */
1412 void brcms_down(struct brcms_info *wl)
1413 {
1414         uint callbacks, ret_val = 0;
1415
1416         /* call common down function */
1417         ret_val = brcms_c_down(wl->wlc);
1418         callbacks = atomic_read(&wl->callbacks) - ret_val;
1419
1420         /* wait for down callbacks to complete */
1421         spin_unlock_bh(&wl->lock);
1422
1423         /* For HIGH_only driver, it's important to actually schedule other work,
1424          * not just spin wait since everything runs at schedule level
1425          */
1426         SPINWAIT((atomic_read(&wl->callbacks) > callbacks), 100 * 1000);
1427
1428         spin_lock_bh(&wl->lock);
1429 }
1430
1431 /*
1432 * precondition: perimeter lock is not acquired
1433  */
1434 static void _brcms_timer(struct work_struct *work)
1435 {
1436         struct brcms_timer *t = container_of(work, struct brcms_timer,
1437                                              dly_wrk.work);
1438
1439         spin_lock_bh(&t->wl->lock);
1440
1441         if (t->set) {
1442                 if (t->periodic) {
1443                         atomic_inc(&t->wl->callbacks);
1444                         ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
1445                                                      &t->dly_wrk,
1446                                                      msecs_to_jiffies(t->ms));
1447                 } else {
1448                         t->set = false;
1449                 }
1450
1451                 t->fn(t->arg);
1452         }
1453
1454         atomic_dec(&t->wl->callbacks);
1455
1456         spin_unlock_bh(&t->wl->lock);
1457 }
1458
1459 /*
1460  * Adds a timer to the list. Caller supplies a timer function.
1461  * Is called from wlc.
1462  *
1463  * precondition: perimeter lock has been acquired
1464  */
1465 struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
1466                                      void (*fn) (void *arg),
1467                                      void *arg, const char *name)
1468 {
1469         struct brcms_timer *t;
1470
1471         t = kzalloc(sizeof(struct brcms_timer), GFP_ATOMIC);
1472         if (!t)
1473                 return NULL;
1474
1475         INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
1476         t->wl = wl;
1477         t->fn = fn;
1478         t->arg = arg;
1479         t->next = wl->timers;
1480         wl->timers = t;
1481
1482 #ifdef DEBUG
1483         t->name = kmalloc(strlen(name) + 1, GFP_ATOMIC);
1484         if (t->name)
1485                 strcpy(t->name, name);
1486 #endif
1487
1488         return t;
1489 }
1490
1491 /*
1492  * adds only the kernel timer since it's going to be more accurate
1493  * as well as it's easier to make it periodic
1494  *
1495  * precondition: perimeter lock has been acquired
1496  */
1497 void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
1498 {
1499         struct ieee80211_hw *hw = t->wl->pub->ieee_hw;
1500
1501 #ifdef DEBUG
1502         if (t->set)
1503                 brcms_dbg_info(t->wl->wlc->hw->d11core,
1504                                "%s: Already set. Name: %s, per %d\n",
1505                                __func__, t->name, periodic);
1506 #endif
1507         t->ms = ms;
1508         t->periodic = (bool) periodic;
1509         if (!t->set) {
1510                 t->set = true;
1511                 atomic_inc(&t->wl->callbacks);
1512         }
1513
1514         ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
1515 }
1516
1517 /*
1518  * return true if timer successfully deleted, false if still pending
1519  *
1520  * precondition: perimeter lock has been acquired
1521  */
1522 bool brcms_del_timer(struct brcms_timer *t)
1523 {
1524         if (t->set) {
1525                 t->set = false;
1526                 if (!cancel_delayed_work(&t->dly_wrk))
1527                         return false;
1528
1529                 atomic_dec(&t->wl->callbacks);
1530         }
1531
1532         return true;
1533 }
1534
1535 /*
1536  * precondition: perimeter lock has been acquired
1537  */
1538 void brcms_free_timer(struct brcms_timer *t)
1539 {
1540         struct brcms_info *wl = t->wl;
1541         struct brcms_timer *tmp;
1542
1543         /* delete the timer in case it is active */
1544         brcms_del_timer(t);
1545
1546         if (wl->timers == t) {
1547                 wl->timers = wl->timers->next;
1548 #ifdef DEBUG
1549                 kfree(t->name);
1550 #endif
1551                 kfree(t);
1552                 return;
1553
1554         }
1555
1556         tmp = wl->timers;
1557         while (tmp) {
1558                 if (tmp->next == t) {
1559                         tmp->next = t->next;
1560 #ifdef DEBUG
1561                         kfree(t->name);
1562 #endif
1563                         kfree(t);
1564                         return;
1565                 }
1566                 tmp = tmp->next;
1567         }
1568
1569 }
1570
1571 /*
1572  * precondition: perimeter lock has been acquired
1573  */
1574 int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
1575 {
1576         int i, entry;
1577         const u8 *pdata;
1578         struct firmware_hdr *hdr;
1579         for (i = 0; i < wl->fw.fw_cnt; i++) {
1580                 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1581                 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1582                      entry++, hdr++) {
1583                         u32 len = le32_to_cpu(hdr->len);
1584                         if (le32_to_cpu(hdr->idx) == idx) {
1585                                 pdata = wl->fw.fw_bin[i]->data +
1586                                         le32_to_cpu(hdr->offset);
1587                                 *pbuf = kmemdup(pdata, len, GFP_ATOMIC);
1588                                 if (*pbuf == NULL)
1589                                         goto fail;
1590
1591                                 return 0;
1592                         }
1593                 }
1594         }
1595         brcms_err(wl->wlc->hw->d11core,
1596                   "ERROR: ucode buf tag:%d can not be found!\n", idx);
1597         *pbuf = NULL;
1598 fail:
1599         return -ENODATA;
1600 }
1601
1602 /*
1603  * Precondition: Since this function is called in brcms_bcma_probe() context,
1604  * no locking is required.
1605  */
1606 int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
1607 {
1608         int i, entry;
1609         const u8 *pdata;
1610         struct firmware_hdr *hdr;
1611         for (i = 0; i < wl->fw.fw_cnt; i++) {
1612                 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1613                 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1614                      entry++, hdr++) {
1615                         if (le32_to_cpu(hdr->idx) == idx) {
1616                                 pdata = wl->fw.fw_bin[i]->data +
1617                                         le32_to_cpu(hdr->offset);
1618                                 if (le32_to_cpu(hdr->len) != 4) {
1619                                         brcms_err(wl->wlc->hw->d11core,
1620                                                   "ERROR: fw hdr len\n");
1621                                         return -ENOMSG;
1622                                 }
1623                                 *n_bytes = le32_to_cpu(*((__le32 *) pdata));
1624                                 return 0;
1625                         }
1626                 }
1627         }
1628         brcms_err(wl->wlc->hw->d11core,
1629                   "ERROR: ucode tag:%d can not be found!\n", idx);
1630         return -ENOMSG;
1631 }
1632
1633 /*
1634  * precondition: can both be called locked and unlocked
1635  */
1636 void brcms_ucode_free_buf(void *p)
1637 {
1638         kfree(p);
1639 }
1640
1641 /*
1642  * checks validity of all firmware images loaded from user space
1643  *
1644  * Precondition: Since this function is called in brcms_bcma_probe() context,
1645  * no locking is required.
1646  */
1647 int brcms_check_firmwares(struct brcms_info *wl)
1648 {
1649         int i;
1650         int entry;
1651         int rc = 0;
1652         const struct firmware *fw;
1653         const struct firmware *fw_hdr;
1654         struct firmware_hdr *ucode_hdr;
1655         for (i = 0; i < MAX_FW_IMAGES && rc == 0; i++) {
1656                 fw =  wl->fw.fw_bin[i];
1657                 fw_hdr = wl->fw.fw_hdr[i];
1658                 if (fw == NULL && fw_hdr == NULL) {
1659                         break;
1660                 } else if (fw == NULL || fw_hdr == NULL) {
1661                         wiphy_err(wl->wiphy, "%s: invalid bin/hdr fw\n",
1662                                   __func__);
1663                         rc = -EBADF;
1664                 } else if (fw_hdr->size % sizeof(struct firmware_hdr)) {
1665                         wiphy_err(wl->wiphy, "%s: non integral fw hdr file "
1666                                 "size %zu/%zu\n", __func__, fw_hdr->size,
1667                                 sizeof(struct firmware_hdr));
1668                         rc = -EBADF;
1669                 } else if (fw->size < MIN_FW_SIZE || fw->size > MAX_FW_SIZE) {
1670                         wiphy_err(wl->wiphy, "%s: out of bounds fw file size %zu\n",
1671                                   __func__, fw->size);
1672                         rc = -EBADF;
1673                 } else {
1674                         /* check if ucode section overruns firmware image */
1675                         ucode_hdr = (struct firmware_hdr *)fw_hdr->data;
1676                         for (entry = 0; entry < wl->fw.hdr_num_entries[i] &&
1677                              !rc; entry++, ucode_hdr++) {
1678                                 if (le32_to_cpu(ucode_hdr->offset) +
1679                                     le32_to_cpu(ucode_hdr->len) >
1680                                     fw->size) {
1681                                         wiphy_err(wl->wiphy,
1682                                                   "%s: conflicting bin/hdr\n",
1683                                                   __func__);
1684                                         rc = -EBADF;
1685                                 }
1686                         }
1687                 }
1688         }
1689         if (rc == 0 && wl->fw.fw_cnt != i) {
1690                 wiphy_err(wl->wiphy, "%s: invalid fw_cnt=%d\n", __func__,
1691                         wl->fw.fw_cnt);
1692                 rc = -EBADF;
1693         }
1694         return rc;
1695 }
1696
1697 /*
1698  * precondition: perimeter lock has been acquired
1699  */
1700 bool brcms_rfkill_set_hw_state(struct brcms_info *wl)
1701 {
1702         bool blocked = brcms_c_check_radio_disabled(wl->wlc);
1703
1704         spin_unlock_bh(&wl->lock);
1705         wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
1706         if (blocked)
1707                 wiphy_rfkill_start_polling(wl->pub->ieee_hw->wiphy);
1708         spin_lock_bh(&wl->lock);
1709         return blocked;
1710 }