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

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define __UNDEF_NO_VERSION__
  18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include <linux/etherdevice.h>
  21 #include <linux/sched.h>
  22 #include <linux/firmware.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/module.h>
  25 #include <linux/bcma/bcma.h>
  26 #include <net/mac80211.h>
  27 #include <defs.h>
  28 #include "phy/phy_int.h"
  29 #include "d11.h"
  30 #include "channel.h"
  31 #include "scb.h"
  32 #include "pub.h"
  33 #include "ucode_loader.h"
  34 #include "mac80211_if.h"
  35 #include "main.h"
  36
  37 #define N_TX_QUEUES     4 /* #tx queues on mac80211<->driver interface */
  38
  39 /* Flags we support */
  40 #define MAC_FILTERS (FIF_PROMISC_IN_BSS | \
  41         FIF_ALLMULTI | \
  42         FIF_FCSFAIL | \
  43         FIF_CONTROL | \
  44         FIF_OTHER_BSS | \
  45         FIF_BCN_PRBRESP_PROMISC | \
  46         FIF_PSPOLL)
  47
  48 #define CHAN2GHZ(channel, freqency, chflags)  { \
  49         .band = IEEE80211_BAND_2GHZ, \
  50         .center_freq = (freqency), \
  51         .hw_value = (channel), \
  52         .flags = chflags, \
  53         .max_antenna_gain = 0, \
  54         .max_power = 19, \
  55 }
  56
  57 #define CHAN5GHZ(channel, chflags)  { \
  58         .band = IEEE80211_BAND_5GHZ, \
  59         .center_freq = 5000 + 5*(channel), \
  60         .hw_value = (channel), \
  61         .flags = chflags, \
  62         .max_antenna_gain = 0, \
  63         .max_power = 21, \
  64 }
  65
  66 #define RATE(rate100m, _flags) { \
  67         .bitrate = (rate100m), \
  68         .flags = (_flags), \
  69         .hw_value = (rate100m / 5), \
  70 }
  71
  72 struct firmware_hdr {
  73         __le32 offset;
  74         __le32 len;
  75         __le32 idx;
  76 };
  77
  78 static const char * const brcms_firmwares[MAX_FW_IMAGES] = {
  79         "brcm/bcm43xx",
  80         NULL
  81 };
  82
  83 static int n_adapters_found;
  84
  85 MODULE_AUTHOR("Broadcom Corporation");
  86 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver.");
  87 MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
  88 MODULE_LICENSE("Dual BSD/GPL");
  89 /* This needs to be adjusted when brcms_firmwares changes */
  90 MODULE_FIRMWARE("brcm/bcm43xx-0.fw");
  91 MODULE_FIRMWARE("brcm/bcm43xx_hdr-0.fw");
  92
  93 /* recognized BCMA Core IDs */
  94 static struct bcma_device_id brcms_coreid_table[] = {
  95         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 23, BCMA_ANY_CLASS),
  96         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 24, BCMA_ANY_CLASS),
  97         BCMA_CORETABLE_END
  98 };
  99 MODULE_DEVICE_TABLE(bcma, brcms_coreid_table);
 100
 101 #if defined(CONFIG_BRCMDBG)
 102 /*
 103  * Module parameter for setting the debug message level. Available
 104  * flags are specified by the BRCM_DL_* macros in
 105  * drivers/net/wireless/brcm80211/include/defs.h.
 106  */
 107 module_param_named(debug, brcm_msg_level, uint, S_IRUGO | S_IWUSR);
 108 #endif
 109
 110 static struct ieee80211_channel brcms_2ghz_chantable[] = {
 111         CHAN2GHZ(1, 2412, IEEE80211_CHAN_NO_HT40MINUS),
 112         CHAN2GHZ(2, 2417, IEEE80211_CHAN_NO_HT40MINUS),
 113         CHAN2GHZ(3, 2422, IEEE80211_CHAN_NO_HT40MINUS),
 114         CHAN2GHZ(4, 2427, IEEE80211_CHAN_NO_HT40MINUS),
 115         CHAN2GHZ(5, 2432, 0),
 116         CHAN2GHZ(6, 2437, 0),
 117         CHAN2GHZ(7, 2442, 0),
 118         CHAN2GHZ(8, 2447, IEEE80211_CHAN_NO_HT40PLUS),
 119         CHAN2GHZ(9, 2452, IEEE80211_CHAN_NO_HT40PLUS),
 120         CHAN2GHZ(10, 2457, IEEE80211_CHAN_NO_HT40PLUS),
 121         CHAN2GHZ(11, 2462, IEEE80211_CHAN_NO_HT40PLUS),
 122         CHAN2GHZ(12, 2467,
 123                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_IBSS |
 124                  IEEE80211_CHAN_NO_HT40PLUS),
 125         CHAN2GHZ(13, 2472,
 126                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_IBSS |
 127                  IEEE80211_CHAN_NO_HT40PLUS),
 128         CHAN2GHZ(14, 2484,
 129                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_IBSS |
 130                  IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
 131                  IEEE80211_CHAN_NO_OFDM)
 132 };
 133
 134 static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
 135         /* UNII-1 */
 136         CHAN5GHZ(36, IEEE80211_CHAN_NO_HT40MINUS),
 137         CHAN5GHZ(40, IEEE80211_CHAN_NO_HT40PLUS),
 138         CHAN5GHZ(44, IEEE80211_CHAN_NO_HT40MINUS),
 139         CHAN5GHZ(48, IEEE80211_CHAN_NO_HT40PLUS),
 140         /* UNII-2 */
 141         CHAN5GHZ(52,
 142                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 143                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 144         CHAN5GHZ(56,
 145                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 146                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 147         CHAN5GHZ(60,
 148                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 149                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 150         CHAN5GHZ(64,
 151                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 152                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 153         /* MID */
 154         CHAN5GHZ(100,
 155                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 156                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 157         CHAN5GHZ(104,
 158                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 159                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 160         CHAN5GHZ(108,
 161                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 162                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 163         CHAN5GHZ(112,
 164                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 165                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 166         CHAN5GHZ(116,
 167                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 168                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 169         CHAN5GHZ(120,
 170                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 171                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 172         CHAN5GHZ(124,
 173                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 174                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 175         CHAN5GHZ(128,
 176                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 177                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 178         CHAN5GHZ(132,
 179                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 180                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40MINUS),
 181         CHAN5GHZ(136,
 182                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 183                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS),
 184         CHAN5GHZ(140,
 185                  IEEE80211_CHAN_RADAR | IEEE80211_CHAN_NO_IBSS |
 186                  IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_HT40PLUS |
 187                  IEEE80211_CHAN_NO_HT40MINUS),
 188         /* UNII-3 */
 189         CHAN5GHZ(149, IEEE80211_CHAN_NO_HT40MINUS),
 190         CHAN5GHZ(153, IEEE80211_CHAN_NO_HT40PLUS),
 191         CHAN5GHZ(157, IEEE80211_CHAN_NO_HT40MINUS),
 192         CHAN5GHZ(161, IEEE80211_CHAN_NO_HT40PLUS),
 193         CHAN5GHZ(165, IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)
 194 };
 195
 196 /*
 197  * The rate table is used for both 2.4G and 5G rates. The
 198  * latter being a subset as it does not support CCK rates.
 199  */
 200 static struct ieee80211_rate legacy_ratetable[] = {
 201         RATE(10, 0),
 202         RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
 203         RATE(55, IEEE80211_RATE_SHORT_PREAMBLE),
 204         RATE(110, IEEE80211_RATE_SHORT_PREAMBLE),
 205         RATE(60, 0),
 206         RATE(90, 0),
 207         RATE(120, 0),
 208         RATE(180, 0),
 209         RATE(240, 0),
 210         RATE(360, 0),
 211         RATE(480, 0),
 212         RATE(540, 0),
 213 };
 214
 215 static const struct ieee80211_supported_band brcms_band_2GHz_nphy_template = {
 216         .band = IEEE80211_BAND_2GHZ,
 217         .channels = brcms_2ghz_chantable,
 218         .n_channels = ARRAY_SIZE(brcms_2ghz_chantable),
 219         .bitrates = legacy_ratetable,
 220         .n_bitrates = ARRAY_SIZE(legacy_ratetable),
 221         .ht_cap = {
 222                    /* from include/linux/ieee80211.h */
 223                    .cap = IEEE80211_HT_CAP_GRN_FLD |
 224                           IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40,
 225                    .ht_supported = true,
 226                    .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
 227                    .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
 228                    .mcs = {
 229                            /* placeholders for now */
 230                            .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
 231                            .rx_highest = cpu_to_le16(500),
 232                            .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
 233                    }
 234 };
 235
 236 static const struct ieee80211_supported_band brcms_band_5GHz_nphy_template = {
 237         .band = IEEE80211_BAND_5GHZ,
 238         .channels = brcms_5ghz_nphy_chantable,
 239         .n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
 240         .bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
 241         .n_bitrates = ARRAY_SIZE(legacy_ratetable) -
 242                         BRCMS_LEGACY_5G_RATE_OFFSET,
 243         .ht_cap = {
 244                    .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
 245                           IEEE80211_HT_CAP_SGI_40,
 246                    .ht_supported = true,
 247                    .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
 248                    .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
 249                    .mcs = {
 250                            /* placeholders for now */
 251                            .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
 252                            .rx_highest = cpu_to_le16(500),
 253                            .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
 254                    }
 255 };
 256
 257 /* flags the given rate in rateset as requested */
 258 static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
 259 {
 260         u32 i;
 261
 262         for (i = 0; i < rs->count; i++) {
 263                 if (rate != (rs->rates[i] & 0x7f))
 264                         continue;
 265
 266                 if (is_br)
 267                         rs->rates[i] |= BRCMS_RATE_FLAG;
 268                 else
 269                         rs->rates[i] &= BRCMS_RATE_MASK;
 270                 return;
 271         }
 272 }
 273
 274 static void brcms_ops_tx(struct ieee80211_hw *hw,
 275                          struct ieee80211_tx_control *control,
 276                          struct sk_buff *skb)
 277 {
 278         struct brcms_info *wl = hw->priv;
 279         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 280
 281         spin_lock_bh(&wl->lock);
 282         if (!wl->pub->up) {
 283                 wiphy_err(wl->wiphy, "ops->tx called while down\n");
 284                 kfree_skb(skb);
 285                 goto done;
 286         }
 287         brcms_c_sendpkt_mac80211(wl->wlc, skb, hw);
 288         tx_info->rate_driver_data[0] = control->sta;
 289  done:
 290         spin_unlock_bh(&wl->lock);
 291 }
 292
 293 static int brcms_ops_start(struct ieee80211_hw *hw)
 294 {
 295         struct brcms_info *wl = hw->priv;
 296         bool blocked;
 297         int err;
 298
 299         ieee80211_wake_queues(hw);
 300         spin_lock_bh(&wl->lock);
 301         blocked = brcms_rfkill_set_hw_state(wl);
 302         spin_unlock_bh(&wl->lock);
 303         if (!blocked)
 304                 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
 305
 306         spin_lock_bh(&wl->lock);
 307         /* avoid acknowledging frames before a non-monitor device is added */
 308         wl->mute_tx = true;
 309
 310         if (!wl->pub->up)
 311                 if (!blocked)
 312                         err = brcms_up(wl);
 313                 else
 314                         err = -ERFKILL;
 315         else
 316                 err = -ENODEV;
 317         spin_unlock_bh(&wl->lock);
 318
 319         if (err != 0)
 320                 wiphy_err(hw->wiphy, "%s: brcms_up() returned %d\n", __func__,
 321                           err);
 322         return err;
 323 }
 324
 325 static void brcms_ops_stop(struct ieee80211_hw *hw)
 326 {
 327         struct brcms_info *wl = hw->priv;
 328         int status;
 329
 330         ieee80211_stop_queues(hw);
 331
 332         if (wl->wlc == NULL)
 333                 return;
 334
 335         spin_lock_bh(&wl->lock);
 336         status = brcms_c_chipmatch(wl->wlc->hw->d11core);
 337         spin_unlock_bh(&wl->lock);
 338         if (!status) {
 339                 wiphy_err(wl->wiphy,
 340                           "wl: brcms_ops_stop: chipmatch failed\n");
 341                 return;
 342         }
 343
 344         /* put driver in down state */
 345         spin_lock_bh(&wl->lock);
 346         brcms_down(wl);
 347         spin_unlock_bh(&wl->lock);
 348 }
 349
 350 static int
 351 brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 352 {
 353         struct brcms_info *wl = hw->priv;
 354
 355         /* Just STA for now */
 356         if (vif->type != NL80211_IFTYPE_STATION) {
 357                 wiphy_err(hw->wiphy, "%s: Attempt to add type %d, only"
 358                           " STA for now\n", __func__, vif->type);
 359                 return -EOPNOTSUPP;
 360         }
 361
 362         wl->mute_tx = false;
 363         brcms_c_mute(wl->wlc, false);
 364
 365         return 0;
 366 }
 367
 368 static void
 369 brcms_ops_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 370 {
 371 }
 372
 373 static int brcms_ops_config(struct ieee80211_hw *hw, u32 changed)
 374 {
 375         struct ieee80211_conf *conf = &hw->conf;
 376         struct brcms_info *wl = hw->priv;
 377         int err = 0;
 378         int new_int;
 379         struct wiphy *wiphy = hw->wiphy;
 380
 381         spin_lock_bh(&wl->lock);
 382         if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
 383                 brcms_c_set_beacon_listen_interval(wl->wlc,
 384                                                    conf->listen_interval);
 385         }
 386         if (changed & IEEE80211_CONF_CHANGE_MONITOR)
 387                 wiphy_dbg(wiphy, "%s: change monitor mode: %s\n",
 388                           __func__, conf->flags & IEEE80211_CONF_MONITOR ?
 389                           "true" : "false");
 390         if (changed & IEEE80211_CONF_CHANGE_PS)
 391                 wiphy_err(wiphy, "%s: change power-save mode: %s (implement)\n",
 392                           __func__, conf->flags & IEEE80211_CONF_PS ?
 393                           "true" : "false");
 394
 395         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 396                 err = brcms_c_set_tx_power(wl->wlc, conf->power_level);
 397                 if (err < 0) {
 398                         wiphy_err(wiphy, "%s: Error setting power_level\n",
 399                                   __func__);
 400                         goto config_out;
 401                 }
 402                 new_int = brcms_c_get_tx_power(wl->wlc);
 403                 if (new_int != conf->power_level)
 404                         wiphy_err(wiphy, "%s: Power level req != actual, %d %d"
 405                                   "\n", __func__, conf->power_level,
 406                                   new_int);
 407         }
 408         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 409                 if (conf->channel_type == NL80211_CHAN_HT20 ||
 410                     conf->channel_type == NL80211_CHAN_NO_HT)
 411                         err = brcms_c_set_channel(wl->wlc,
 412                                                   conf->channel->hw_value);
 413                 else
 414                         err = -ENOTSUPP;
 415         }
 416         if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
 417                 err = brcms_c_set_rate_limit(wl->wlc,
 418                                              conf->short_frame_max_tx_count,
 419                                              conf->long_frame_max_tx_count);
 420
 421  config_out:
 422         spin_unlock_bh(&wl->lock);
 423         return err;
 424 }
 425
 426 static void
 427 brcms_ops_bss_info_changed(struct ieee80211_hw *hw,
 428                         struct ieee80211_vif *vif,
 429                         struct ieee80211_bss_conf *info, u32 changed)
 430 {
 431         struct brcms_info *wl = hw->priv;
 432         struct wiphy *wiphy = hw->wiphy;
 433
 434         if (changed & BSS_CHANGED_ASSOC) {
 435                 /* association status changed (associated/disassociated)
 436                  * also implies a change in the AID.
 437                  */
 438                 wiphy_err(wiphy, "%s: %s: %sassociated\n", KBUILD_MODNAME,
 439                           __func__, info->assoc ? "" : "dis");
 440                 spin_lock_bh(&wl->lock);
 441                 brcms_c_associate_upd(wl->wlc, info->assoc);
 442                 spin_unlock_bh(&wl->lock);
 443         }
 444         if (changed & BSS_CHANGED_ERP_SLOT) {
 445                 s8 val;
 446
 447                 /* slot timing changed */
 448                 if (info->use_short_slot)
 449                         val = 1;
 450                 else
 451                         val = 0;
 452                 spin_lock_bh(&wl->lock);
 453                 brcms_c_set_shortslot_override(wl->wlc, val);
 454                 spin_unlock_bh(&wl->lock);
 455         }
 456
 457         if (changed & BSS_CHANGED_HT) {
 458                 /* 802.11n parameters changed */
 459                 u16 mode = info->ht_operation_mode;
 460
 461                 spin_lock_bh(&wl->lock);
 462                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_CFG,
 463                         mode & IEEE80211_HT_OP_MODE_PROTECTION);
 464                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_NONGF,
 465                         mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 466                 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_OBSS,
 467                         mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
 468                 spin_unlock_bh(&wl->lock);
 469         }
 470         if (changed & BSS_CHANGED_BASIC_RATES) {
 471                 struct ieee80211_supported_band *bi;
 472                 u32 br_mask, i;
 473                 u16 rate;
 474                 struct brcm_rateset rs;
 475                 int error;
 476
 477                 /* retrieve the current rates */
 478                 spin_lock_bh(&wl->lock);
 479                 brcms_c_get_current_rateset(wl->wlc, &rs);
 480                 spin_unlock_bh(&wl->lock);
 481
 482                 br_mask = info->basic_rates;
 483                 bi = hw->wiphy->bands[brcms_c_get_curband(wl->wlc)];
 484                 for (i = 0; i < bi->n_bitrates; i++) {
 485                         /* convert to internal rate value */
 486                         rate = (bi->bitrates[i].bitrate << 1) / 10;
 487
 488                         /* set/clear basic rate flag */
 489                         brcms_set_basic_rate(&rs, rate, br_mask & 1);
 490                         br_mask >>= 1;
 491                 }
 492
 493                 /* update the rate set */
 494                 spin_lock_bh(&wl->lock);
 495                 error = brcms_c_set_rateset(wl->wlc, &rs);
 496                 spin_unlock_bh(&wl->lock);
 497                 if (error)
 498                         wiphy_err(wiphy, "changing basic rates failed: %d\n",
 499                                   error);
 500         }
 501         if (changed & BSS_CHANGED_BEACON_INT) {
 502                 /* Beacon interval changed */
 503                 spin_lock_bh(&wl->lock);
 504                 brcms_c_set_beacon_period(wl->wlc, info->beacon_int);
 505                 spin_unlock_bh(&wl->lock);
 506         }
 507         if (changed & BSS_CHANGED_BSSID) {
 508                 /* BSSID changed, for whatever reason (IBSS and managed mode) */
 509                 spin_lock_bh(&wl->lock);
 510                 brcms_c_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid);
 511                 spin_unlock_bh(&wl->lock);
 512         }
 513         if (changed & BSS_CHANGED_BEACON)
 514                 /* Beacon data changed, retrieve new beacon (beaconing modes) */
 515                 wiphy_err(wiphy, "%s: beacon changed\n", __func__);
 516
 517         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 518                 /* Beaconing should be enabled/disabled (beaconing modes) */
 519                 wiphy_err(wiphy, "%s: Beacon enabled: %s\n", __func__,
 520                           info->enable_beacon ? "true" : "false");
 521         }
 522
 523         if (changed & BSS_CHANGED_CQM) {
 524                 /* Connection quality monitor config changed */
 525                 wiphy_err(wiphy, "%s: cqm change: threshold %d, hys %d "
 526                           " (implement)\n", __func__, info->cqm_rssi_thold,
 527                           info->cqm_rssi_hyst);
 528         }
 529
 530         if (changed & BSS_CHANGED_IBSS) {
 531                 /* IBSS join status changed */
 532                 wiphy_err(wiphy, "%s: IBSS joined: %s (implement)\n", __func__,
 533                           info->ibss_joined ? "true" : "false");
 534         }
 535
 536         if (changed & BSS_CHANGED_ARP_FILTER) {
 537                 /* Hardware ARP filter address list or state changed */
 538                 wiphy_err(wiphy, "%s: arp filtering: enabled %s, count %d"
 539                           " (implement)\n", __func__, info->arp_filter_enabled ?
 540                           "true" : "false", info->arp_addr_cnt);
 541         }
 542
 543         if (changed & BSS_CHANGED_QOS) {
 544                 /*
 545                  * QoS for this association was enabled/disabled.
 546                  * Note that it is only ever disabled for station mode.
 547                  */
 548                 wiphy_err(wiphy, "%s: qos enabled: %s (implement)\n", __func__,
 549                           info->qos ? "true" : "false");
 550         }
 551         return;
 552 }
 553
 554 static void
 555 brcms_ops_configure_filter(struct ieee80211_hw *hw,
 556                         unsigned int changed_flags,
 557                         unsigned int *total_flags, u64 multicast)
 558 {
 559         struct brcms_info *wl = hw->priv;
 560         struct wiphy *wiphy = hw->wiphy;
 561
 562         changed_flags &= MAC_FILTERS;
 563         *total_flags &= MAC_FILTERS;
 564
 565         if (changed_flags & FIF_PROMISC_IN_BSS)
 566                 wiphy_dbg(wiphy, "FIF_PROMISC_IN_BSS\n");
 567         if (changed_flags & FIF_ALLMULTI)
 568                 wiphy_dbg(wiphy, "FIF_ALLMULTI\n");
 569         if (changed_flags & FIF_FCSFAIL)
 570                 wiphy_dbg(wiphy, "FIF_FCSFAIL\n");
 571         if (changed_flags & FIF_CONTROL)
 572                 wiphy_dbg(wiphy, "FIF_CONTROL\n");
 573         if (changed_flags & FIF_OTHER_BSS)
 574                 wiphy_dbg(wiphy, "FIF_OTHER_BSS\n");
 575         if (changed_flags & FIF_PSPOLL)
 576                 wiphy_dbg(wiphy, "FIF_PSPOLL\n");
 577         if (changed_flags & FIF_BCN_PRBRESP_PROMISC)
 578                 wiphy_dbg(wiphy, "FIF_BCN_PRBRESP_PROMISC\n");
 579
 580         spin_lock_bh(&wl->lock);
 581         brcms_c_mac_promisc(wl->wlc, *total_flags);
 582         spin_unlock_bh(&wl->lock);
 583         return;
 584 }
 585
 586 static void brcms_ops_sw_scan_start(struct ieee80211_hw *hw)
 587 {
 588         struct brcms_info *wl = hw->priv;
 589         spin_lock_bh(&wl->lock);
 590         brcms_c_scan_start(wl->wlc);
 591         spin_unlock_bh(&wl->lock);
 592         return;
 593 }
 594
 595 static void brcms_ops_sw_scan_complete(struct ieee80211_hw *hw)
 596 {
 597         struct brcms_info *wl = hw->priv;
 598         spin_lock_bh(&wl->lock);
 599         brcms_c_scan_stop(wl->wlc);
 600         spin_unlock_bh(&wl->lock);
 601         return;
 602 }
 603
 604 static int
 605 brcms_ops_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
 606                   const struct ieee80211_tx_queue_params *params)
 607 {
 608         struct brcms_info *wl = hw->priv;
 609
 610         spin_lock_bh(&wl->lock);
 611         brcms_c_wme_setparams(wl->wlc, queue, params, true);
 612         spin_unlock_bh(&wl->lock);
 613
 614         return 0;
 615 }
 616
 617 static int
 618 brcms_ops_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 619                struct ieee80211_sta *sta)
 620 {
 621         struct brcms_info *wl = hw->priv;
 622         struct scb *scb = &wl->wlc->pri_scb;
 623
 624         brcms_c_init_scb(scb);
 625
 626         wl->pub->global_ampdu = &(scb->scb_ampdu);
 627         wl->pub->global_ampdu->scb = scb;
 628         wl->pub->global_ampdu->max_pdu = 16;
 629
 630         /*
 631          * minstrel_ht initiates addBA on our behalf by calling
 632          * ieee80211_start_tx_ba_session()
 633          */
 634         return 0;
 635 }
 636
 637 static int
 638 brcms_ops_ampdu_action(struct ieee80211_hw *hw,
 639                     struct ieee80211_vif *vif,
 640                     enum ieee80211_ampdu_mlme_action action,
 641                     struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 642                     u8 buf_size)
 643 {
 644         struct brcms_info *wl = hw->priv;
 645         struct scb *scb = &wl->wlc->pri_scb;
 646         int status;
 647
 648         if (WARN_ON(scb->magic != SCB_MAGIC))
 649                 return -EIDRM;
 650         switch (action) {
 651         case IEEE80211_AMPDU_RX_START:
 652                 break;
 653         case IEEE80211_AMPDU_RX_STOP:
 654                 break;
 655         case IEEE80211_AMPDU_TX_START:
 656                 spin_lock_bh(&wl->lock);
 657                 status = brcms_c_aggregatable(wl->wlc, tid);
 658                 spin_unlock_bh(&wl->lock);
 659                 if (!status) {
 660                         wiphy_err(wl->wiphy, "START: tid %d is not agg\'able\n",
 661                                   tid);
 662                         return -EINVAL;
 663                 }
 664                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 665                 break;
 666
 667         case IEEE80211_AMPDU_TX_STOP:
 668                 spin_lock_bh(&wl->lock);
 669                 brcms_c_ampdu_flush(wl->wlc, sta, tid);
 670                 spin_unlock_bh(&wl->lock);
 671                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 672                 break;
 673         case IEEE80211_AMPDU_TX_OPERATIONAL:
 674                 /*
 675                  * BA window size from ADDBA response ('buf_size') defines how
 676                  * many outstanding MPDUs are allowed for the BA stream by
 677                  * recipient and traffic class. 'ampdu_factor' gives maximum
 678                  * AMPDU size.
 679                  */
 680                 spin_lock_bh(&wl->lock);
 681                 brcms_c_ampdu_tx_operational(wl->wlc, tid, buf_size,
 682                         (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 683                          sta->ht_cap.ampdu_factor)) - 1);
 684                 spin_unlock_bh(&wl->lock);
 685                 /* Power save wakeup */
 686                 break;
 687         default:
 688                 wiphy_err(wl->wiphy, "%s: Invalid command, ignoring\n",
 689                           __func__);
 690         }
 691
 692         return 0;
 693 }
 694
 695 static void brcms_ops_rfkill_poll(struct ieee80211_hw *hw)
 696 {
 697         struct brcms_info *wl = hw->priv;
 698         bool blocked;
 699
 700         spin_lock_bh(&wl->lock);
 701         blocked = brcms_c_check_radio_disabled(wl->wlc);
 702         spin_unlock_bh(&wl->lock);
 703
 704         wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
 705 }
 706
 707 static void brcms_ops_flush(struct ieee80211_hw *hw, bool drop)
 708 {
 709         struct brcms_info *wl = hw->priv;
 710
 711         no_printk("%s: drop = %s\n", __func__, drop ? "true" : "false");
 712
 713         /* wait for packet queue and dma fifos to run empty */
 714         spin_lock_bh(&wl->lock);
 715         brcms_c_wait_for_tx_completion(wl->wlc, drop);
 716         spin_unlock_bh(&wl->lock);
 717 }
 718
 719 static const struct ieee80211_ops brcms_ops = {
 720         .tx = brcms_ops_tx,
 721         .start = brcms_ops_start,
 722         .stop = brcms_ops_stop,
 723         .add_interface = brcms_ops_add_interface,
 724         .remove_interface = brcms_ops_remove_interface,
 725         .config = brcms_ops_config,
 726         .bss_info_changed = brcms_ops_bss_info_changed,
 727         .configure_filter = brcms_ops_configure_filter,
 728         .sw_scan_start = brcms_ops_sw_scan_start,
 729         .sw_scan_complete = brcms_ops_sw_scan_complete,
 730         .conf_tx = brcms_ops_conf_tx,
 731         .sta_add = brcms_ops_sta_add,
 732         .ampdu_action = brcms_ops_ampdu_action,
 733         .rfkill_poll = brcms_ops_rfkill_poll,
 734         .flush = brcms_ops_flush,
 735 };
 736
 737 void brcms_dpc(unsigned long data)
 738 {
 739         struct brcms_info *wl;
 740
 741         wl = (struct brcms_info *) data;
 742
 743         spin_lock_bh(&wl->lock);
 744
 745         /* call the common second level interrupt handler */
 746         if (wl->pub->up) {
 747                 if (wl->resched) {
 748                         unsigned long flags;
 749
 750                         spin_lock_irqsave(&wl->isr_lock, flags);
 751                         brcms_c_intrsupd(wl->wlc);
 752                         spin_unlock_irqrestore(&wl->isr_lock, flags);
 753                 }
 754
 755                 wl->resched = brcms_c_dpc(wl->wlc, true);
 756         }
 757
 758         /* brcms_c_dpc() may bring the driver down */
 759         if (!wl->pub->up)
 760                 goto done;
 761
 762         /* re-schedule dpc */
 763         if (wl->resched)
 764                 tasklet_schedule(&wl->tasklet);
 765         else
 766                 /* re-enable interrupts */
 767                 brcms_intrson(wl);
 768
 769  done:
 770         spin_unlock_bh(&wl->lock);
 771 }
 772
 773 /*
 774  * Precondition: Since this function is called in brcms_pci_probe() context,
 775  * no locking is required.
 776  */
 777 static int brcms_request_fw(struct brcms_info *wl, struct bcma_device *pdev)
 778 {
 779         int status;
 780         struct device *device = &pdev->dev;
 781         char fw_name[100];
 782         int i;
 783
 784         memset(&wl->fw, 0, sizeof(struct brcms_firmware));
 785         for (i = 0; i < MAX_FW_IMAGES; i++) {
 786                 if (brcms_firmwares[i] == NULL)
 787                         break;
 788                 sprintf(fw_name, "%s-%d.fw", brcms_firmwares[i],
 789                         UCODE_LOADER_API_VER);
 790                 status = request_firmware(&wl->fw.fw_bin[i], fw_name, device);
 791                 if (status) {
 792                         wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
 793                                   KBUILD_MODNAME, fw_name);
 794                         return status;
 795                 }
 796                 sprintf(fw_name, "%s_hdr-%d.fw", brcms_firmwares[i],
 797                         UCODE_LOADER_API_VER);
 798                 status = request_firmware(&wl->fw.fw_hdr[i], fw_name, device);
 799                 if (status) {
 800                         wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
 801                                   KBUILD_MODNAME, fw_name);
 802                         return status;
 803                 }
 804                 wl->fw.hdr_num_entries[i] =
 805                     wl->fw.fw_hdr[i]->size / (sizeof(struct firmware_hdr));
 806         }
 807         wl->fw.fw_cnt = i;
 808         return brcms_ucode_data_init(wl, &wl->ucode);
 809 }
 810
 811 /*
 812  * Precondition: Since this function is called in brcms_pci_probe() context,
 813  * no locking is required.
 814  */
 815 static void brcms_release_fw(struct brcms_info *wl)
 816 {
 817         int i;
 818         for (i = 0; i < MAX_FW_IMAGES; i++) {
 819                 release_firmware(wl->fw.fw_bin[i]);
 820                 release_firmware(wl->fw.fw_hdr[i]);
 821         }
 822 }
 823
 824 /**
 825  * This function frees the WL per-device resources.
 826  *
 827  * This function frees resources owned by the WL device pointed to
 828  * by the wl parameter.
 829  *
 830  * precondition: can both be called locked and unlocked
 831  *
 832  */
 833 static void brcms_free(struct brcms_info *wl)
 834 {
 835         struct brcms_timer *t, *next;
 836
 837         /* free ucode data */
 838         if (wl->fw.fw_cnt)
 839                 brcms_ucode_data_free(&wl->ucode);
 840         if (wl->irq)
 841                 free_irq(wl->irq, wl);
 842
 843         /* kill dpc */
 844         tasklet_kill(&wl->tasklet);
 845
 846         if (wl->pub)
 847                 brcms_c_module_unregister(wl->pub, "linux", wl);
 848
 849         /* free common resources */
 850         if (wl->wlc) {
 851                 brcms_c_detach(wl->wlc);
 852                 wl->wlc = NULL;
 853                 wl->pub = NULL;
 854         }
 855
 856         /* virtual interface deletion is deferred so we cannot spinwait */
 857
 858         /* wait for all pending callbacks to complete */
 859         while (atomic_read(&wl->callbacks) > 0)
 860                 schedule();
 861
 862         /* free timers */
 863         for (t = wl->timers; t; t = next) {
 864                 next = t->next;
 865 #ifdef DEBUG
 866                 kfree(t->name);
 867 #endif
 868                 kfree(t);
 869         }
 870 }
 871
 872 /*
 873 * called from both kernel as from this kernel module (error flow on attach)
 874 * precondition: perimeter lock is not acquired.
 875 */
 876 static void brcms_remove(struct bcma_device *pdev)
 877 {
 878         struct ieee80211_hw *hw = bcma_get_drvdata(pdev);
 879         struct brcms_info *wl = hw->priv;
 880
 881         if (wl->wlc) {
 882                 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
 883                 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
 884                 ieee80211_unregister_hw(hw);
 885         }
 886
 887         brcms_free(wl);
 888
 889         bcma_set_drvdata(pdev, NULL);
 890         ieee80211_free_hw(hw);
 891 }
 892
 893 static irqreturn_t brcms_isr(int irq, void *dev_id)
 894 {
 895         struct brcms_info *wl;
 896         bool ours, wantdpc;
 897
 898         wl = (struct brcms_info *) dev_id;
 899
 900         spin_lock(&wl->isr_lock);
 901
 902         /* call common first level interrupt handler */
 903         ours = brcms_c_isr(wl->wlc, &wantdpc);
 904         if (ours) {
 905                 /* if more to do... */
 906                 if (wantdpc) {
 907
 908                         /* ...and call the second level interrupt handler */
 909                         /* schedule dpc */
 910                         tasklet_schedule(&wl->tasklet);
 911                 }
 912         }
 913
 914         spin_unlock(&wl->isr_lock);
 915
 916         return IRQ_RETVAL(ours);
 917 }
 918
 919 /*
 920  * is called in brcms_pci_probe() context, therefore no locking required.
 921  */
 922 static int ieee_hw_rate_init(struct ieee80211_hw *hw)
 923 {
 924         struct brcms_info *wl = hw->priv;
 925         struct brcms_c_info *wlc = wl->wlc;
 926         struct ieee80211_supported_band *band;
 927         int has_5g = 0;
 928         u16 phy_type;
 929
 930         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 931         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 932
 933         phy_type = brcms_c_get_phy_type(wl->wlc, 0);
 934         if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
 935                 band = &wlc->bandstate[BAND_2G_INDEX]->band;
 936                 *band = brcms_band_2GHz_nphy_template;
 937                 if (phy_type == PHY_TYPE_LCN) {
 938                         /* Single stream */
 939                         band->ht_cap.mcs.rx_mask[1] = 0;
 940                         band->ht_cap.mcs.rx_highest = cpu_to_le16(72);
 941                 }
 942                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = band;
 943         } else {
 944                 return -EPERM;
 945         }
 946
 947         /* Assume all bands use the same phy.  True for 11n devices. */
 948         if (wl->pub->_nbands > 1) {
 949                 has_5g++;
 950                 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
 951                         band = &wlc->bandstate[BAND_5G_INDEX]->band;
 952                         *band = brcms_band_5GHz_nphy_template;
 953                         hw->wiphy->bands[IEEE80211_BAND_5GHZ] = band;
 954                 } else {
 955                         return -EPERM;
 956                 }
 957         }
 958         return 0;
 959 }
 960
 961 /*
 962  * is called in brcms_pci_probe() context, therefore no locking required.
 963  */
 964 static int ieee_hw_init(struct ieee80211_hw *hw)
 965 {
 966         hw->flags = IEEE80211_HW_SIGNAL_DBM
 967             /* | IEEE80211_HW_CONNECTION_MONITOR  What is this? */
 968             | IEEE80211_HW_REPORTS_TX_ACK_STATUS
 969             | IEEE80211_HW_AMPDU_AGGREGATION;
 970
 971         hw->extra_tx_headroom = brcms_c_get_header_len();
 972         hw->queues = N_TX_QUEUES;
 973         hw->max_rates = 2;      /* Primary rate and 1 fallback rate */
 974
 975         /* channel change time is dependent on chip and band  */
 976         hw->channel_change_time = 7 * 1000;
 977         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 978
 979         hw->rate_control_algorithm = "minstrel_ht";
 980
 981         hw->sta_data_size = 0;
 982         return ieee_hw_rate_init(hw);
 983 }
 984
 985 /**
 986  * attach to the WL device.
 987  *
 988  * Attach to the WL device identified by vendor and device parameters.
 989  * regs is a host accessible memory address pointing to WL device registers.
 990  *
 991  * brcms_attach is not defined as static because in the case where no bus
 992  * is defined, wl_attach will never be called, and thus, gcc will issue
 993  * a warning that this function is defined but not used if we declare
 994  * it as static.
 995  *
 996  *
 997  * is called in brcms_bcma_probe() context, therefore no locking required.
 998  */
 999 static struct brcms_info *brcms_attach(struct bcma_device *pdev)
1000 {
1001         struct brcms_info *wl = NULL;
1002         int unit, err;
1003         struct ieee80211_hw *hw;
1004         u8 perm[ETH_ALEN];
1005
1006         unit = n_adapters_found;
1007         err = 0;
1008
1009         if (unit < 0)
1010                 return NULL;
1011
1012         /* allocate private info */
1013         hw = bcma_get_drvdata(pdev);
1014         if (hw != NULL)
1015                 wl = hw->priv;
1016         if (WARN_ON(hw == NULL) || WARN_ON(wl == NULL))
1017                 return NULL;
1018         wl->wiphy = hw->wiphy;
1019
1020         atomic_set(&wl->callbacks, 0);
1021
1022         /* setup the bottom half handler */
1023         tasklet_init(&wl->tasklet, brcms_dpc, (unsigned long) wl);
1024
1025         spin_lock_init(&wl->lock);
1026         spin_lock_init(&wl->isr_lock);
1027
1028         /* prepare ucode */
1029         if (brcms_request_fw(wl, pdev) < 0) {
1030                 wiphy_err(wl->wiphy, "%s: Failed to find firmware usually in "
1031                           "%s\n", KBUILD_MODNAME, "/lib/firmware/brcm");
1032                 brcms_release_fw(wl);
1033                 brcms_remove(pdev);
1034                 return NULL;
1035         }
1036
1037         /* common load-time initialization */
1038         wl->wlc = brcms_c_attach((void *)wl, pdev, unit, false, &err);
1039         brcms_release_fw(wl);
1040         if (!wl->wlc) {
1041                 wiphy_err(wl->wiphy, "%s: attach() failed with code %d\n",
1042                           KBUILD_MODNAME, err);
1043                 goto fail;
1044         }
1045         wl->pub = brcms_c_pub(wl->wlc);
1046
1047         wl->pub->ieee_hw = hw;
1048
1049         /* register our interrupt handler */
1050         if (request_irq(pdev->irq, brcms_isr,
1051                         IRQF_SHARED, KBUILD_MODNAME, wl)) {
1052                 wiphy_err(wl->wiphy, "wl%d: request_irq() failed\n", unit);
1053                 goto fail;
1054         }
1055         wl->irq = pdev->irq;
1056
1057         /* register module */
1058         brcms_c_module_register(wl->pub, "linux", wl, NULL);
1059
1060         if (ieee_hw_init(hw)) {
1061                 wiphy_err(wl->wiphy, "wl%d: %s: ieee_hw_init failed!\n", unit,
1062                           __func__);
1063                 goto fail;
1064         }
1065
1066         brcms_c_regd_init(wl->wlc);
1067
1068         memcpy(perm, &wl->pub->cur_etheraddr, ETH_ALEN);
1069         if (WARN_ON(!is_valid_ether_addr(perm)))
1070                 goto fail;
1071         SET_IEEE80211_PERM_ADDR(hw, perm);
1072
1073         err = ieee80211_register_hw(hw);
1074         if (err)
1075                 wiphy_err(wl->wiphy, "%s: ieee80211_register_hw failed, status"
1076                           "%d\n", __func__, err);
1077
1078         if (wl->pub->srom_ccode[0] &&
1079             regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
1080                 wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);
1081
1082         n_adapters_found++;
1083         return wl;
1084
1085 fail:
1086         brcms_free(wl);
1087         return NULL;
1088 }
1089
1090
1091
1092 /**
1093  * determines if a device is a WL device, and if so, attaches it.
1094  *
1095  * This function determines if a device pointed to by pdev is a WL device,
1096  * and if so, performs a brcms_attach() on it.
1097  *
1098  * Perimeter lock is initialized in the course of this function.
1099  */
1100 static int __devinit brcms_bcma_probe(struct bcma_device *pdev)
1101 {
1102         struct brcms_info *wl;
1103         struct ieee80211_hw *hw;
1104
1105         dev_info(&pdev->dev, "mfg %x core %x rev %d class %d irq %d\n",
1106                  pdev->id.manuf, pdev->id.id, pdev->id.rev, pdev->id.class,
1107                  pdev->irq);
1108
1109         if ((pdev->id.manuf != BCMA_MANUF_BCM) ||
1110             (pdev->id.id != BCMA_CORE_80211))
1111                 return -ENODEV;
1112
1113         hw = ieee80211_alloc_hw(sizeof(struct brcms_info), &brcms_ops);
1114         if (!hw) {
1115                 pr_err("%s: ieee80211_alloc_hw failed\n", __func__);
1116                 return -ENOMEM;
1117         }
1118
1119         SET_IEEE80211_DEV(hw, &pdev->dev);
1120
1121         bcma_set_drvdata(pdev, hw);
1122
1123         memset(hw->priv, 0, sizeof(*wl));
1124
1125         wl = brcms_attach(pdev);
1126         if (!wl) {
1127                 pr_err("%s: brcms_attach failed!\n", __func__);
1128                 return -ENODEV;
1129         }
1130         return 0;
1131 }
1132
1133 static int brcms_suspend(struct bcma_device *pdev)
1134 {
1135         struct brcms_info *wl;
1136         struct ieee80211_hw *hw;
1137
1138         hw = bcma_get_drvdata(pdev);
1139         wl = hw->priv;
1140         if (!wl) {
1141                 pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
1142                        __func__);
1143                 return -ENODEV;
1144         }
1145
1146         /* only need to flag hw is down for proper resume */
1147         spin_lock_bh(&wl->lock);
1148         wl->pub->hw_up = false;
1149         spin_unlock_bh(&wl->lock);
1150
1151         pr_debug("brcms_suspend ok\n");
1152
1153         return 0;
1154 }
1155
1156 static int brcms_resume(struct bcma_device *pdev)
1157 {
1158         pr_debug("brcms_resume ok\n");
1159         return 0;
1160 }
1161
1162 static struct bcma_driver brcms_bcma_driver = {
1163         .name     = KBUILD_MODNAME,
1164         .probe    = brcms_bcma_probe,
1165         .suspend  = brcms_suspend,
1166         .resume   = brcms_resume,
1167         .remove   = __devexit_p(brcms_remove),
1168         .id_table = brcms_coreid_table,
1169 };
1170
1171 /**
1172  * This is the main entry point for the brcmsmac driver.
1173  *
1174  * This function is scheduled upon module initialization and
1175  * does the driver registration, which result in brcms_bcma_probe()
1176  * call resulting in the driver bringup.
1177  */
1178 static void brcms_driver_init(struct work_struct *work)
1179 {
1180         int error;
1181
1182         error = bcma_driver_register(&brcms_bcma_driver);
1183         if (error)
1184                 pr_err("%s: register returned %d\n", __func__, error);
1185 }
1186
1187 static DECLARE_WORK(brcms_driver_work, brcms_driver_init);
1188
1189 static int __init brcms_module_init(void)
1190 {
1191         if (!schedule_work(&brcms_driver_work))
1192                 return -EBUSY;
1193
1194         return 0;
1195 }
1196
1197 /**
1198  * This function unloads the brcmsmac driver from the system.
1199  *
1200  * This function unconditionally unloads the brcmsmac driver module from the
1201  * system.
1202  *
1203  */
1204 static void __exit brcms_module_exit(void)
1205 {
1206         cancel_work_sync(&brcms_driver_work);
1207         bcma_driver_unregister(&brcms_bcma_driver);
1208 }
1209
1210 module_init(brcms_module_init);
1211 module_exit(brcms_module_exit);
1212
1213 /*
1214  * precondition: perimeter lock has been acquired
1215  */
1216 void brcms_txflowcontrol(struct brcms_info *wl, struct brcms_if *wlif,
1217                          bool state, int prio)
1218 {
1219         wiphy_err(wl->wiphy, "Shouldn't be here %s\n", __func__);
1220 }
1221
1222 /*
1223  * precondition: perimeter lock has been acquired
1224  */
1225 void brcms_init(struct brcms_info *wl)
1226 {
1227         BCMMSG(wl->pub->ieee_hw->wiphy, "wl%d\n", wl->pub->unit);
1228         brcms_reset(wl);
1229         brcms_c_init(wl->wlc, wl->mute_tx);
1230 }
1231
1232 /*
1233  * precondition: perimeter lock has been acquired
1234  */
1235 uint brcms_reset(struct brcms_info *wl)
1236 {
1237         BCMMSG(wl->pub->ieee_hw->wiphy, "wl%d\n", wl->pub->unit);
1238         brcms_c_reset(wl->wlc);
1239
1240         /* dpc will not be rescheduled */
1241         wl->resched = false;
1242
1243         /* inform publicly that interface is down */
1244         wl->pub->up = false;
1245
1246         return 0;
1247 }
1248
1249 void brcms_fatal_error(struct brcms_info *wl)
1250 {
1251         wiphy_err(wl->wlc->wiphy, "wl%d: fatal error, reinitializing\n",
1252                   wl->wlc->pub->unit);
1253         brcms_reset(wl);
1254         ieee80211_restart_hw(wl->pub->ieee_hw);
1255 }
1256
1257 /*
1258  * These are interrupt on/off entry points. Disable interrupts
1259  * during interrupt state transition.
1260  */
1261 void brcms_intrson(struct brcms_info *wl)
1262 {
1263         unsigned long flags;
1264
1265         spin_lock_irqsave(&wl->isr_lock, flags);
1266         brcms_c_intrson(wl->wlc);
1267         spin_unlock_irqrestore(&wl->isr_lock, flags);
1268 }
1269
1270 u32 brcms_intrsoff(struct brcms_info *wl)
1271 {
1272         unsigned long flags;
1273         u32 status;
1274
1275         spin_lock_irqsave(&wl->isr_lock, flags);
1276         status = brcms_c_intrsoff(wl->wlc);
1277         spin_unlock_irqrestore(&wl->isr_lock, flags);
1278         return status;
1279 }
1280
1281 void brcms_intrsrestore(struct brcms_info *wl, u32 macintmask)
1282 {
1283         unsigned long flags;
1284
1285         spin_lock_irqsave(&wl->isr_lock, flags);
1286         brcms_c_intrsrestore(wl->wlc, macintmask);
1287         spin_unlock_irqrestore(&wl->isr_lock, flags);
1288 }
1289
1290 /*
1291  * precondition: perimeter lock has been acquired
1292  */
1293 int brcms_up(struct brcms_info *wl)
1294 {
1295         int error = 0;
1296
1297         if (wl->pub->up)
1298                 return 0;
1299
1300         error = brcms_c_up(wl->wlc);
1301
1302         return error;
1303 }
1304
1305 /*
1306  * precondition: perimeter lock has been acquired
1307  */
1308 void brcms_down(struct brcms_info *wl)
1309 {
1310         uint callbacks, ret_val = 0;
1311
1312         /* call common down function */
1313         ret_val = brcms_c_down(wl->wlc);
1314         callbacks = atomic_read(&wl->callbacks) - ret_val;
1315
1316         /* wait for down callbacks to complete */
1317         spin_unlock_bh(&wl->lock);
1318
1319         /* For HIGH_only driver, it's important to actually schedule other work,
1320          * not just spin wait since everything runs at schedule level
1321          */
1322         SPINWAIT((atomic_read(&wl->callbacks) > callbacks), 100 * 1000);
1323
1324         spin_lock_bh(&wl->lock);
1325 }
1326
1327 /*
1328 * precondition: perimeter lock is not acquired
1329  */
1330 static void _brcms_timer(struct work_struct *work)
1331 {
1332         struct brcms_timer *t = container_of(work, struct brcms_timer,
1333                                              dly_wrk.work);
1334
1335         spin_lock_bh(&t->wl->lock);
1336
1337         if (t->set) {
1338                 if (t->periodic) {
1339                         atomic_inc(&t->wl->callbacks);
1340                         ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
1341                                                      &t->dly_wrk,
1342                                                      msecs_to_jiffies(t->ms));
1343                 } else {
1344                         t->set = false;
1345                 }
1346
1347                 t->fn(t->arg);
1348         }
1349
1350         atomic_dec(&t->wl->callbacks);
1351
1352         spin_unlock_bh(&t->wl->lock);
1353 }
1354
1355 /*
1356  * Adds a timer to the list. Caller supplies a timer function.
1357  * Is called from wlc.
1358  *
1359  * precondition: perimeter lock has been acquired
1360  */
1361 struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
1362                                      void (*fn) (void *arg),
1363                                      void *arg, const char *name)
1364 {
1365         struct brcms_timer *t;
1366
1367         t = kzalloc(sizeof(struct brcms_timer), GFP_ATOMIC);
1368         if (!t)
1369                 return NULL;
1370
1371         INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
1372         t->wl = wl;
1373         t->fn = fn;
1374         t->arg = arg;
1375         t->next = wl->timers;
1376         wl->timers = t;
1377
1378 #ifdef DEBUG
1379         t->name = kmalloc(strlen(name) + 1, GFP_ATOMIC);
1380         if (t->name)
1381                 strcpy(t->name, name);
1382 #endif
1383
1384         return t;
1385 }
1386
1387 /*
1388  * adds only the kernel timer since it's going to be more accurate
1389  * as well as it's easier to make it periodic
1390  *
1391  * precondition: perimeter lock has been acquired
1392  */
1393 void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
1394 {
1395         struct ieee80211_hw *hw = t->wl->pub->ieee_hw;
1396
1397 #ifdef DEBUG
1398         if (t->set)
1399                 wiphy_err(hw->wiphy, "%s: Already set. Name: %s, per %d\n",
1400                           __func__, t->name, periodic);
1401 #endif
1402         t->ms = ms;
1403         t->periodic = (bool) periodic;
1404         t->set = true;
1405
1406         atomic_inc(&t->wl->callbacks);
1407
1408         ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
1409 }
1410
1411 /*
1412  * return true if timer successfully deleted, false if still pending
1413  *
1414  * precondition: perimeter lock has been acquired
1415  */
1416 bool brcms_del_timer(struct brcms_timer *t)
1417 {
1418         if (t->set) {
1419                 t->set = false;
1420                 if (!cancel_delayed_work(&t->dly_wrk))
1421                         return false;
1422
1423                 atomic_dec(&t->wl->callbacks);
1424         }
1425
1426         return true;
1427 }
1428
1429 /*
1430  * precondition: perimeter lock has been acquired
1431  */
1432 void brcms_free_timer(struct brcms_timer *t)
1433 {
1434         struct brcms_info *wl = t->wl;
1435         struct brcms_timer *tmp;
1436
1437         /* delete the timer in case it is active */
1438         brcms_del_timer(t);
1439
1440         if (wl->timers == t) {
1441                 wl->timers = wl->timers->next;
1442 #ifdef DEBUG
1443                 kfree(t->name);
1444 #endif
1445                 kfree(t);
1446                 return;
1447
1448         }
1449
1450         tmp = wl->timers;
1451         while (tmp) {
1452                 if (tmp->next == t) {
1453                         tmp->next = t->next;
1454 #ifdef DEBUG
1455                         kfree(t->name);
1456 #endif
1457                         kfree(t);
1458                         return;
1459                 }
1460                 tmp = tmp->next;
1461         }
1462
1463 }
1464
1465 /*
1466  * precondition: perimeter lock has been acquired
1467  */
1468 int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
1469 {
1470         int i, entry;
1471         const u8 *pdata;
1472         struct firmware_hdr *hdr;
1473         for (i = 0; i < wl->fw.fw_cnt; i++) {
1474                 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1475                 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1476                      entry++, hdr++) {
1477                         u32 len = le32_to_cpu(hdr->len);
1478                         if (le32_to_cpu(hdr->idx) == idx) {
1479                                 pdata = wl->fw.fw_bin[i]->data +
1480                                         le32_to_cpu(hdr->offset);
1481                                 *pbuf = kmemdup(pdata, len, GFP_ATOMIC);
1482                                 if (*pbuf == NULL)
1483                                         goto fail;
1484
1485                                 return 0;
1486                         }
1487                 }
1488         }
1489         wiphy_err(wl->wiphy, "ERROR: ucode buf tag:%d can not be found!\n",
1490                   idx);
1491         *pbuf = NULL;
1492 fail:
1493         return -ENODATA;
1494 }
1495
1496 /*
1497  * Precondition: Since this function is called in brcms_bcma_probe() context,
1498  * no locking is required.
1499  */
1500 int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
1501 {
1502         int i, entry;
1503         const u8 *pdata;
1504         struct firmware_hdr *hdr;
1505         for (i = 0; i < wl->fw.fw_cnt; i++) {
1506                 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1507                 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1508                      entry++, hdr++) {
1509                         if (le32_to_cpu(hdr->idx) == idx) {
1510                                 pdata = wl->fw.fw_bin[i]->data +
1511                                         le32_to_cpu(hdr->offset);
1512                                 if (le32_to_cpu(hdr->len) != 4) {
1513                                         wiphy_err(wl->wiphy,
1514                                                   "ERROR: fw hdr len\n");
1515                                         return -ENOMSG;
1516                                 }
1517                                 *n_bytes = le32_to_cpu(*((__le32 *) pdata));
1518                                 return 0;
1519                         }
1520                 }
1521         }
1522         wiphy_err(wl->wiphy, "ERROR: ucode tag:%d can not be found!\n", idx);
1523         return -ENOMSG;
1524 }
1525
1526 /*
1527  * precondition: can both be called locked and unlocked
1528  */
1529 void brcms_ucode_free_buf(void *p)
1530 {
1531         kfree(p);
1532 }
1533
1534 /*
1535  * checks validity of all firmware images loaded from user space
1536  *
1537  * Precondition: Since this function is called in brcms_bcma_probe() context,
1538  * no locking is required.
1539  */
1540 int brcms_check_firmwares(struct brcms_info *wl)
1541 {
1542         int i;
1543         int entry;
1544         int rc = 0;
1545         const struct firmware *fw;
1546         const struct firmware *fw_hdr;
1547         struct firmware_hdr *ucode_hdr;
1548         for (i = 0; i < MAX_FW_IMAGES && rc == 0; i++) {
1549                 fw =  wl->fw.fw_bin[i];
1550                 fw_hdr = wl->fw.fw_hdr[i];
1551                 if (fw == NULL && fw_hdr == NULL) {
1552                         break;
1553                 } else if (fw == NULL || fw_hdr == NULL) {
1554                         wiphy_err(wl->wiphy, "%s: invalid bin/hdr fw\n",
1555                                   __func__);
1556                         rc = -EBADF;
1557                 } else if (fw_hdr->size % sizeof(struct firmware_hdr)) {
1558                         wiphy_err(wl->wiphy, "%s: non integral fw hdr file "
1559                                 "size %zu/%zu\n", __func__, fw_hdr->size,
1560                                 sizeof(struct firmware_hdr));
1561                         rc = -EBADF;
1562                 } else if (fw->size < MIN_FW_SIZE || fw->size > MAX_FW_SIZE) {
1563                         wiphy_err(wl->wiphy, "%s: out of bounds fw file size "
1564                                   "%zu\n", __func__, fw->size);
1565                         rc = -EBADF;
1566                 } else {
1567                         /* check if ucode section overruns firmware image */
1568                         ucode_hdr = (struct firmware_hdr *)fw_hdr->data;
1569                         for (entry = 0; entry < wl->fw.hdr_num_entries[i] &&
1570                              !rc; entry++, ucode_hdr++) {
1571                                 if (le32_to_cpu(ucode_hdr->offset) +
1572                                     le32_to_cpu(ucode_hdr->len) >
1573                                     fw->size) {
1574                                         wiphy_err(wl->wiphy,
1575                                                   "%s: conflicting bin/hdr\n",
1576                                                   __func__);
1577                                         rc = -EBADF;
1578                                 }
1579                         }
1580                 }
1581         }
1582         if (rc == 0 && wl->fw.fw_cnt != i) {
1583                 wiphy_err(wl->wiphy, "%s: invalid fw_cnt=%d\n", __func__,
1584                         wl->fw.fw_cnt);
1585                 rc = -EBADF;
1586         }
1587         return rc;
1588 }
1589
1590 /*
1591  * precondition: perimeter lock has been acquired
1592  */
1593 bool brcms_rfkill_set_hw_state(struct brcms_info *wl)
1594 {
1595         bool blocked = brcms_c_check_radio_disabled(wl->wlc);
1596
1597         spin_unlock_bh(&wl->lock);
1598         wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
1599         if (blocked)
1600                 wiphy_rfkill_start_polling(wl->pub->ieee_hw->wiphy);
1601         spin_lock_bh(&wl->lock);
1602         return blocked;
1603 }
1604
1605 /*
1606  * precondition: perimeter lock has been acquired
1607  */
1608 void brcms_msleep(struct brcms_info *wl, uint ms)
1609 {
1610         spin_unlock_bh(&wl->lock);
1611         msleep(ms);
1612         spin_lock_bh(&wl->lock);
1613 }