git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/b43legacy/main.c

   1 /*
   2  *
   3  *  Broadcom B43legacy wireless driver
   4  *
   5  *  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
   6  *  Copyright (c) 2005-2008 Stefano Brivio <stefano.brivio@polimi.it>
   7  *  Copyright (c) 2005, 2006 Michael Buesch <mb@bu3sch.de>
   8  *  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
   9  *  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  10  *  Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>
  11  *
  12  *  Some parts of the code in this file are derived from the ipw2200
  13  *  driver  Copyright(c) 2003 - 2004 Intel Corporation.
  14
  15  *  This program is free software; you can redistribute it and/or modify
  16  *  it under the terms of the GNU General Public License as published by
  17  *  the Free Software Foundation; either version 2 of the License, or
  18  *  (at your option) any later version.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program; see the file COPYING.  If not, write to
  27  *  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  28  *  Boston, MA 02110-1301, USA.
  29  *
  30  */
  31
  32 #include <linux/delay.h>
  33 #include <linux/init.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/if_arp.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/version.h>
  38 #include <linux/firmware.h>
  39 #include <linux/wireless.h>
  40 #include <linux/workqueue.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/dma-mapping.h>
  43 #include <net/dst.h>
  44 #include <asm/unaligned.h>
  45
  46 #include "b43legacy.h"
  47 #include "main.h"
  48 #include "debugfs.h"
  49 #include "phy.h"
  50 #include "dma.h"
  51 #include "pio.h"
  52 #include "sysfs.h"
  53 #include "xmit.h"
  54 #include "radio.h"
  55
  56
  57 MODULE_DESCRIPTION("Broadcom B43legacy wireless driver");
  58 MODULE_AUTHOR("Martin Langer");
  59 MODULE_AUTHOR("Stefano Brivio");
  60 MODULE_AUTHOR("Michael Buesch");
  61 MODULE_LICENSE("GPL");
  62
  63 MODULE_FIRMWARE(B43legacy_SUPPORTED_FIRMWARE_ID);
  64
  65 #if defined(CONFIG_B43LEGACY_DMA) && defined(CONFIG_B43LEGACY_PIO)
  66 static int modparam_pio;
  67 module_param_named(pio, modparam_pio, int, 0444);
  68 MODULE_PARM_DESC(pio, "enable(1) / disable(0) PIO mode");
  69 #elif defined(CONFIG_B43LEGACY_DMA)
  70 # define modparam_pio   0
  71 #elif defined(CONFIG_B43LEGACY_PIO)
  72 # define modparam_pio   1
  73 #endif
  74
  75 static int modparam_bad_frames_preempt;
  76 module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444);
  77 MODULE_PARM_DESC(bad_frames_preempt, "enable(1) / disable(0) Bad Frames"
  78                  " Preemption");
  79
  80 static char modparam_fwpostfix[16];
  81 module_param_string(fwpostfix, modparam_fwpostfix, 16, 0444);
  82 MODULE_PARM_DESC(fwpostfix, "Postfix for the firmware files to load.");
  83
  84 /* The following table supports BCM4301, BCM4303 and BCM4306/2 devices. */
  85 static const struct ssb_device_id b43legacy_ssb_tbl[] = {
  86         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 2),
  87         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 4),
  88         SSB_DEVTABLE_END
  89 };
  90 MODULE_DEVICE_TABLE(ssb, b43legacy_ssb_tbl);
  91
  92
  93 /* Channel and ratetables are shared for all devices.
  94  * They can't be const, because ieee80211 puts some precalculated
  95  * data in there. This data is the same for all devices, so we don't
  96  * get concurrency issues */
  97 #define RATETAB_ENT(_rateid, _flags) \
  98         {                                                               \
  99                 .bitrate        = B43legacy_RATE_TO_100KBPS(_rateid),   \
 100                 .hw_value       = (_rateid),                            \
 101                 .flags          = (_flags),                             \
 102         }
 103 /*
 104  * NOTE: When changing this, sync with xmit.c's
 105  *       b43legacy_plcp_get_bitrate_idx_* functions!
 106  */
 107 static struct ieee80211_rate __b43legacy_ratetable[] = {
 108         RATETAB_ENT(B43legacy_CCK_RATE_1MB, 0),
 109         RATETAB_ENT(B43legacy_CCK_RATE_2MB, IEEE80211_RATE_SHORT_PREAMBLE),
 110         RATETAB_ENT(B43legacy_CCK_RATE_5MB, IEEE80211_RATE_SHORT_PREAMBLE),
 111         RATETAB_ENT(B43legacy_CCK_RATE_11MB, IEEE80211_RATE_SHORT_PREAMBLE),
 112         RATETAB_ENT(B43legacy_OFDM_RATE_6MB, 0),
 113         RATETAB_ENT(B43legacy_OFDM_RATE_9MB, 0),
 114         RATETAB_ENT(B43legacy_OFDM_RATE_12MB, 0),
 115         RATETAB_ENT(B43legacy_OFDM_RATE_18MB, 0),
 116         RATETAB_ENT(B43legacy_OFDM_RATE_24MB, 0),
 117         RATETAB_ENT(B43legacy_OFDM_RATE_36MB, 0),
 118         RATETAB_ENT(B43legacy_OFDM_RATE_48MB, 0),
 119         RATETAB_ENT(B43legacy_OFDM_RATE_54MB, 0),
 120 };
 121 #define b43legacy_b_ratetable           (__b43legacy_ratetable + 0)
 122 #define b43legacy_b_ratetable_size      4
 123 #define b43legacy_g_ratetable           (__b43legacy_ratetable + 0)
 124 #define b43legacy_g_ratetable_size      12
 125
 126 #define CHANTAB_ENT(_chanid, _freq) \
 127         {                                                       \
 128                 .center_freq    = (_freq),                      \
 129                 .hw_value       = (_chanid),                    \
 130         }
 131 static struct ieee80211_channel b43legacy_bg_chantable[] = {
 132         CHANTAB_ENT(1, 2412),
 133         CHANTAB_ENT(2, 2417),
 134         CHANTAB_ENT(3, 2422),
 135         CHANTAB_ENT(4, 2427),
 136         CHANTAB_ENT(5, 2432),
 137         CHANTAB_ENT(6, 2437),
 138         CHANTAB_ENT(7, 2442),
 139         CHANTAB_ENT(8, 2447),
 140         CHANTAB_ENT(9, 2452),
 141         CHANTAB_ENT(10, 2457),
 142         CHANTAB_ENT(11, 2462),
 143         CHANTAB_ENT(12, 2467),
 144         CHANTAB_ENT(13, 2472),
 145         CHANTAB_ENT(14, 2484),
 146 };
 147
 148 static struct ieee80211_supported_band b43legacy_band_2GHz_BPHY = {
 149         .channels = b43legacy_bg_chantable,
 150         .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
 151         .bitrates = b43legacy_b_ratetable,
 152         .n_bitrates = b43legacy_b_ratetable_size,
 153 };
 154
 155 static struct ieee80211_supported_band b43legacy_band_2GHz_GPHY = {
 156         .channels = b43legacy_bg_chantable,
 157         .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
 158         .bitrates = b43legacy_g_ratetable,
 159         .n_bitrates = b43legacy_g_ratetable_size,
 160 };
 161
 162 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev);
 163 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev);
 164 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev);
 165 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev);
 166
 167
 168 static int b43legacy_ratelimit(struct b43legacy_wl *wl)
 169 {
 170         if (!wl || !wl->current_dev)
 171                 return 1;
 172         if (b43legacy_status(wl->current_dev) < B43legacy_STAT_STARTED)
 173                 return 1;
 174         /* We are up and running.
 175          * Ratelimit the messages to avoid DoS over the net. */
 176         return net_ratelimit();
 177 }
 178
 179 void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
 180 {
 181         va_list args;
 182
 183         if (!b43legacy_ratelimit(wl))
 184                 return;
 185         va_start(args, fmt);
 186         printk(KERN_INFO "b43legacy-%s: ",
 187                (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
 188         vprintk(fmt, args);
 189         va_end(args);
 190 }
 191
 192 void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
 193 {
 194         va_list args;
 195
 196         if (!b43legacy_ratelimit(wl))
 197                 return;
 198         va_start(args, fmt);
 199         printk(KERN_ERR "b43legacy-%s ERROR: ",
 200                (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
 201         vprintk(fmt, args);
 202         va_end(args);
 203 }
 204
 205 void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
 206 {
 207         va_list args;
 208
 209         if (!b43legacy_ratelimit(wl))
 210                 return;
 211         va_start(args, fmt);
 212         printk(KERN_WARNING "b43legacy-%s warning: ",
 213                (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
 214         vprintk(fmt, args);
 215         va_end(args);
 216 }
 217
 218 #if B43legacy_DEBUG
 219 void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
 220 {
 221         va_list args;
 222
 223         va_start(args, fmt);
 224         printk(KERN_DEBUG "b43legacy-%s debug: ",
 225                (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
 226         vprintk(fmt, args);
 227         va_end(args);
 228 }
 229 #endif /* DEBUG */
 230
 231 static void b43legacy_ram_write(struct b43legacy_wldev *dev, u16 offset,
 232                                 u32 val)
 233 {
 234         u32 status;
 235
 236         B43legacy_WARN_ON(offset % 4 != 0);
 237
 238         status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 239         if (status & B43legacy_MACCTL_BE)
 240                 val = swab32(val);
 241
 242         b43legacy_write32(dev, B43legacy_MMIO_RAM_CONTROL, offset);
 243         mmiowb();
 244         b43legacy_write32(dev, B43legacy_MMIO_RAM_DATA, val);
 245 }
 246
 247 static inline
 248 void b43legacy_shm_control_word(struct b43legacy_wldev *dev,
 249                                 u16 routing, u16 offset)
 250 {
 251         u32 control;
 252
 253         /* "offset" is the WORD offset. */
 254
 255         control = routing;
 256         control <<= 16;
 257         control |= offset;
 258         b43legacy_write32(dev, B43legacy_MMIO_SHM_CONTROL, control);
 259 }
 260
 261 u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
 262                        u16 routing, u16 offset)
 263 {
 264         u32 ret;
 265
 266         if (routing == B43legacy_SHM_SHARED) {
 267                 B43legacy_WARN_ON((offset & 0x0001) != 0);
 268                 if (offset & 0x0003) {
 269                         /* Unaligned access */
 270                         b43legacy_shm_control_word(dev, routing, offset >> 2);
 271                         ret = b43legacy_read16(dev,
 272                                 B43legacy_MMIO_SHM_DATA_UNALIGNED);
 273                         ret <<= 16;
 274                         b43legacy_shm_control_word(dev, routing,
 275                                                      (offset >> 2) + 1);
 276                         ret |= b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
 277
 278                         return ret;
 279                 }
 280                 offset >>= 2;
 281         }
 282         b43legacy_shm_control_word(dev, routing, offset);
 283         ret = b43legacy_read32(dev, B43legacy_MMIO_SHM_DATA);
 284
 285         return ret;
 286 }
 287
 288 u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
 289                            u16 routing, u16 offset)
 290 {
 291         u16 ret;
 292
 293         if (routing == B43legacy_SHM_SHARED) {
 294                 B43legacy_WARN_ON((offset & 0x0001) != 0);
 295                 if (offset & 0x0003) {
 296                         /* Unaligned access */
 297                         b43legacy_shm_control_word(dev, routing, offset >> 2);
 298                         ret = b43legacy_read16(dev,
 299                                              B43legacy_MMIO_SHM_DATA_UNALIGNED);
 300
 301                         return ret;
 302                 }
 303                 offset >>= 2;
 304         }
 305         b43legacy_shm_control_word(dev, routing, offset);
 306         ret = b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
 307
 308         return ret;
 309 }
 310
 311 void b43legacy_shm_write32(struct b43legacy_wldev *dev,
 312                            u16 routing, u16 offset,
 313                            u32 value)
 314 {
 315         if (routing == B43legacy_SHM_SHARED) {
 316                 B43legacy_WARN_ON((offset & 0x0001) != 0);
 317                 if (offset & 0x0003) {
 318                         /* Unaligned access */
 319                         b43legacy_shm_control_word(dev, routing, offset >> 2);
 320                         mmiowb();
 321                         b43legacy_write16(dev,
 322                                           B43legacy_MMIO_SHM_DATA_UNALIGNED,
 323                                           (value >> 16) & 0xffff);
 324                         mmiowb();
 325                         b43legacy_shm_control_word(dev, routing,
 326                                                    (offset >> 2) + 1);
 327                         mmiowb();
 328                         b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA,
 329                                           value & 0xffff);
 330                         return;
 331                 }
 332                 offset >>= 2;
 333         }
 334         b43legacy_shm_control_word(dev, routing, offset);
 335         mmiowb();
 336         b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, value);
 337 }
 338
 339 void b43legacy_shm_write16(struct b43legacy_wldev *dev, u16 routing, u16 offset,
 340                            u16 value)
 341 {
 342         if (routing == B43legacy_SHM_SHARED) {
 343                 B43legacy_WARN_ON((offset & 0x0001) != 0);
 344                 if (offset & 0x0003) {
 345                         /* Unaligned access */
 346                         b43legacy_shm_control_word(dev, routing, offset >> 2);
 347                         mmiowb();
 348                         b43legacy_write16(dev,
 349                                           B43legacy_MMIO_SHM_DATA_UNALIGNED,
 350                                           value);
 351                         return;
 352                 }
 353                 offset >>= 2;
 354         }
 355         b43legacy_shm_control_word(dev, routing, offset);
 356         mmiowb();
 357         b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA, value);
 358 }
 359
 360 /* Read HostFlags */
 361 u32 b43legacy_hf_read(struct b43legacy_wldev *dev)
 362 {
 363         u32 ret;
 364
 365         ret = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
 366                                    B43legacy_SHM_SH_HOSTFHI);
 367         ret <<= 16;
 368         ret |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
 369                                     B43legacy_SHM_SH_HOSTFLO);
 370
 371         return ret;
 372 }
 373
 374 /* Write HostFlags */
 375 void b43legacy_hf_write(struct b43legacy_wldev *dev, u32 value)
 376 {
 377         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
 378                               B43legacy_SHM_SH_HOSTFLO,
 379                               (value & 0x0000FFFF));
 380         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
 381                               B43legacy_SHM_SH_HOSTFHI,
 382                               ((value & 0xFFFF0000) >> 16));
 383 }
 384
 385 void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf)
 386 {
 387         /* We need to be careful. As we read the TSF from multiple
 388          * registers, we should take care of register overflows.
 389          * In theory, the whole tsf read process should be atomic.
 390          * We try to be atomic here, by restaring the read process,
 391          * if any of the high registers changed (overflew).
 392          */
 393         if (dev->dev->id.revision >= 3) {
 394                 u32 low;
 395                 u32 high;
 396                 u32 high2;
 397
 398                 do {
 399                         high = b43legacy_read32(dev,
 400                                         B43legacy_MMIO_REV3PLUS_TSF_HIGH);
 401                         low = b43legacy_read32(dev,
 402                                         B43legacy_MMIO_REV3PLUS_TSF_LOW);
 403                         high2 = b43legacy_read32(dev,
 404                                         B43legacy_MMIO_REV3PLUS_TSF_HIGH);
 405                 } while (unlikely(high != high2));
 406
 407                 *tsf = high;
 408                 *tsf <<= 32;
 409                 *tsf |= low;
 410         } else {
 411                 u64 tmp;
 412                 u16 v0;
 413                 u16 v1;
 414                 u16 v2;
 415                 u16 v3;
 416                 u16 test1;
 417                 u16 test2;
 418                 u16 test3;
 419
 420                 do {
 421                         v3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
 422                         v2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
 423                         v1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
 424                         v0 = b43legacy_read16(dev, B43legacy_MMIO_TSF_0);
 425
 426                         test3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
 427                         test2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
 428                         test1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
 429                 } while (v3 != test3 || v2 != test2 || v1 != test1);
 430
 431                 *tsf = v3;
 432                 *tsf <<= 48;
 433                 tmp = v2;
 434                 tmp <<= 32;
 435                 *tsf |= tmp;
 436                 tmp = v1;
 437                 tmp <<= 16;
 438                 *tsf |= tmp;
 439                 *tsf |= v0;
 440         }
 441 }
 442
 443 static void b43legacy_time_lock(struct b43legacy_wldev *dev)
 444 {
 445         u32 status;
 446
 447         status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 448         status |= B43legacy_MACCTL_TBTTHOLD;
 449         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
 450         mmiowb();
 451 }
 452
 453 static void b43legacy_time_unlock(struct b43legacy_wldev *dev)
 454 {
 455         u32 status;
 456
 457         status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 458         status &= ~B43legacy_MACCTL_TBTTHOLD;
 459         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
 460 }
 461
 462 static void b43legacy_tsf_write_locked(struct b43legacy_wldev *dev, u64 tsf)
 463 {
 464         /* Be careful with the in-progress timer.
 465          * First zero out the low register, so we have a full
 466          * register-overflow duration to complete the operation.
 467          */
 468         if (dev->dev->id.revision >= 3) {
 469                 u32 lo = (tsf & 0x00000000FFFFFFFFULL);
 470                 u32 hi = (tsf & 0xFFFFFFFF00000000ULL) >> 32;
 471
 472                 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW, 0);
 473                 mmiowb();
 474                 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_HIGH,
 475                                     hi);
 476                 mmiowb();
 477                 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW,
 478                                     lo);
 479         } else {
 480                 u16 v0 = (tsf & 0x000000000000FFFFULL);
 481                 u16 v1 = (tsf & 0x00000000FFFF0000ULL) >> 16;
 482                 u16 v2 = (tsf & 0x0000FFFF00000000ULL) >> 32;
 483                 u16 v3 = (tsf & 0xFFFF000000000000ULL) >> 48;
 484
 485                 b43legacy_write16(dev, B43legacy_MMIO_TSF_0, 0);
 486                 mmiowb();
 487                 b43legacy_write16(dev, B43legacy_MMIO_TSF_3, v3);
 488                 mmiowb();
 489                 b43legacy_write16(dev, B43legacy_MMIO_TSF_2, v2);
 490                 mmiowb();
 491                 b43legacy_write16(dev, B43legacy_MMIO_TSF_1, v1);
 492                 mmiowb();
 493                 b43legacy_write16(dev, B43legacy_MMIO_TSF_0, v0);
 494         }
 495 }
 496
 497 void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf)
 498 {
 499         b43legacy_time_lock(dev);
 500         b43legacy_tsf_write_locked(dev, tsf);
 501         b43legacy_time_unlock(dev);
 502 }
 503
 504 static
 505 void b43legacy_macfilter_set(struct b43legacy_wldev *dev,
 506                              u16 offset, const u8 *mac)
 507 {
 508         static const u8 zero_addr[ETH_ALEN] = { 0 };
 509         u16 data;
 510
 511         if (!mac)
 512                 mac = zero_addr;
 513
 514         offset |= 0x0020;
 515         b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_CONTROL, offset);
 516
 517         data = mac[0];
 518         data |= mac[1] << 8;
 519         b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
 520         data = mac[2];
 521         data |= mac[3] << 8;
 522         b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
 523         data = mac[4];
 524         data |= mac[5] << 8;
 525         b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
 526 }
 527
 528 static void b43legacy_write_mac_bssid_templates(struct b43legacy_wldev *dev)
 529 {
 530         static const u8 zero_addr[ETH_ALEN] = { 0 };
 531         const u8 *mac = dev->wl->mac_addr;
 532         const u8 *bssid = dev->wl->bssid;
 533         u8 mac_bssid[ETH_ALEN * 2];
 534         int i;
 535         u32 tmp;
 536
 537         if (!bssid)
 538                 bssid = zero_addr;
 539         if (!mac)
 540                 mac = zero_addr;
 541
 542         b43legacy_macfilter_set(dev, B43legacy_MACFILTER_BSSID, bssid);
 543
 544         memcpy(mac_bssid, mac, ETH_ALEN);
 545         memcpy(mac_bssid + ETH_ALEN, bssid, ETH_ALEN);
 546
 547         /* Write our MAC address and BSSID to template ram */
 548         for (i = 0; i < ARRAY_SIZE(mac_bssid); i += sizeof(u32)) {
 549                 tmp =  (u32)(mac_bssid[i + 0]);
 550                 tmp |= (u32)(mac_bssid[i + 1]) << 8;
 551                 tmp |= (u32)(mac_bssid[i + 2]) << 16;
 552                 tmp |= (u32)(mac_bssid[i + 3]) << 24;
 553                 b43legacy_ram_write(dev, 0x20 + i, tmp);
 554                 b43legacy_ram_write(dev, 0x78 + i, tmp);
 555                 b43legacy_ram_write(dev, 0x478 + i, tmp);
 556         }
 557 }
 558
 559 static void b43legacy_upload_card_macaddress(struct b43legacy_wldev *dev)
 560 {
 561         b43legacy_write_mac_bssid_templates(dev);
 562         b43legacy_macfilter_set(dev, B43legacy_MACFILTER_SELF,
 563                                 dev->wl->mac_addr);
 564 }
 565
 566 static void b43legacy_set_slot_time(struct b43legacy_wldev *dev,
 567                                     u16 slot_time)
 568 {
 569         /* slot_time is in usec. */
 570         if (dev->phy.type != B43legacy_PHYTYPE_G)
 571                 return;
 572         b43legacy_write16(dev, 0x684, 510 + slot_time);
 573         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0010,
 574                               slot_time);
 575 }
 576
 577 static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
 578 {
 579         b43legacy_set_slot_time(dev, 9);
 580         dev->short_slot = 1;
 581 }
 582
 583 static void b43legacy_short_slot_timing_disable(struct b43legacy_wldev *dev)
 584 {
 585         b43legacy_set_slot_time(dev, 20);
 586         dev->short_slot = 0;
 587 }
 588
 589 /* Enable a Generic IRQ. "mask" is the mask of which IRQs to enable.
 590  * Returns the _previously_ enabled IRQ mask.
 591  */
 592 static inline u32 b43legacy_interrupt_enable(struct b43legacy_wldev *dev,
 593                                              u32 mask)
 594 {
 595         u32 old_mask;
 596
 597         old_mask = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK);
 598         b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, old_mask |
 599                           mask);
 600
 601         return old_mask;
 602 }
 603
 604 /* Disable a Generic IRQ. "mask" is the mask of which IRQs to disable.
 605  * Returns the _previously_ enabled IRQ mask.
 606  */
 607 static inline u32 b43legacy_interrupt_disable(struct b43legacy_wldev *dev,
 608                                               u32 mask)
 609 {
 610         u32 old_mask;
 611
 612         old_mask = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK);
 613         b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, old_mask & ~mask);
 614
 615         return old_mask;
 616 }
 617
 618 /* Synchronize IRQ top- and bottom-half.
 619  * IRQs must be masked before calling this.
 620  * This must not be called with the irq_lock held.
 621  */
 622 static void b43legacy_synchronize_irq(struct b43legacy_wldev *dev)
 623 {
 624         synchronize_irq(dev->dev->irq);
 625         tasklet_kill(&dev->isr_tasklet);
 626 }
 627
 628 /* DummyTransmission function, as documented on
 629  * http://bcm-specs.sipsolutions.net/DummyTransmission
 630  */
 631 void b43legacy_dummy_transmission(struct b43legacy_wldev *dev)
 632 {
 633         struct b43legacy_phy *phy = &dev->phy;
 634         unsigned int i;
 635         unsigned int max_loop;
 636         u16 value;
 637         u32 buffer[5] = {
 638                 0x00000000,
 639                 0x00D40000,
 640                 0x00000000,
 641                 0x01000000,
 642                 0x00000000,
 643         };
 644
 645         switch (phy->type) {
 646         case B43legacy_PHYTYPE_B:
 647         case B43legacy_PHYTYPE_G:
 648                 max_loop = 0xFA;
 649                 buffer[0] = 0x000B846E;
 650                 break;
 651         default:
 652                 B43legacy_BUG_ON(1);
 653                 return;
 654         }
 655
 656         for (i = 0; i < 5; i++)
 657                 b43legacy_ram_write(dev, i * 4, buffer[i]);
 658
 659         /* dummy read follows */
 660         b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 661
 662         b43legacy_write16(dev, 0x0568, 0x0000);
 663         b43legacy_write16(dev, 0x07C0, 0x0000);
 664         b43legacy_write16(dev, 0x050C, 0x0000);
 665         b43legacy_write16(dev, 0x0508, 0x0000);
 666         b43legacy_write16(dev, 0x050A, 0x0000);
 667         b43legacy_write16(dev, 0x054C, 0x0000);
 668         b43legacy_write16(dev, 0x056A, 0x0014);
 669         b43legacy_write16(dev, 0x0568, 0x0826);
 670         b43legacy_write16(dev, 0x0500, 0x0000);
 671         b43legacy_write16(dev, 0x0502, 0x0030);
 672
 673         if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
 674                 b43legacy_radio_write16(dev, 0x0051, 0x0017);
 675         for (i = 0x00; i < max_loop; i++) {
 676                 value = b43legacy_read16(dev, 0x050E);
 677                 if (value & 0x0080)
 678                         break;
 679                 udelay(10);
 680         }
 681         for (i = 0x00; i < 0x0A; i++) {
 682                 value = b43legacy_read16(dev, 0x050E);
 683                 if (value & 0x0400)
 684                         break;
 685                 udelay(10);
 686         }
 687         for (i = 0x00; i < 0x0A; i++) {
 688                 value = b43legacy_read16(dev, 0x0690);
 689                 if (!(value & 0x0100))
 690                         break;
 691                 udelay(10);
 692         }
 693         if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
 694                 b43legacy_radio_write16(dev, 0x0051, 0x0037);
 695 }
 696
 697 /* Turn the Analog ON/OFF */
 698 static void b43legacy_switch_analog(struct b43legacy_wldev *dev, int on)
 699 {
 700         b43legacy_write16(dev, B43legacy_MMIO_PHY0, on ? 0 : 0xF4);
 701 }
 702
 703 void b43legacy_wireless_core_reset(struct b43legacy_wldev *dev, u32 flags)
 704 {
 705         u32 tmslow;
 706         u32 macctl;
 707
 708         flags |= B43legacy_TMSLOW_PHYCLKEN;
 709         flags |= B43legacy_TMSLOW_PHYRESET;
 710         ssb_device_enable(dev->dev, flags);
 711         msleep(2); /* Wait for the PLL to turn on. */
 712
 713         /* Now take the PHY out of Reset again */
 714         tmslow = ssb_read32(dev->dev, SSB_TMSLOW);
 715         tmslow |= SSB_TMSLOW_FGC;
 716         tmslow &= ~B43legacy_TMSLOW_PHYRESET;
 717         ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
 718         ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
 719         msleep(1);
 720         tmslow &= ~SSB_TMSLOW_FGC;
 721         ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
 722         ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
 723         msleep(1);
 724
 725         /* Turn Analog ON */
 726         b43legacy_switch_analog(dev, 1);
 727
 728         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
 729         macctl &= ~B43legacy_MACCTL_GMODE;
 730         if (flags & B43legacy_TMSLOW_GMODE) {
 731                 macctl |= B43legacy_MACCTL_GMODE;
 732                 dev->phy.gmode = 1;
 733         } else
 734                 dev->phy.gmode = 0;
 735         macctl |= B43legacy_MACCTL_IHR_ENABLED;
 736         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
 737 }
 738
 739 static void handle_irq_transmit_status(struct b43legacy_wldev *dev)
 740 {
 741         u32 v0;
 742         u32 v1;
 743         u16 tmp;
 744         struct b43legacy_txstatus stat;
 745
 746         while (1) {
 747                 v0 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
 748                 if (!(v0 & 0x00000001))
 749                         break;
 750                 v1 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
 751
 752                 stat.cookie = (v0 >> 16);
 753                 stat.seq = (v1 & 0x0000FFFF);
 754                 stat.phy_stat = ((v1 & 0x00FF0000) >> 16);
 755                 tmp = (v0 & 0x0000FFFF);
 756                 stat.frame_count = ((tmp & 0xF000) >> 12);
 757                 stat.rts_count = ((tmp & 0x0F00) >> 8);
 758                 stat.supp_reason = ((tmp & 0x001C) >> 2);
 759                 stat.pm_indicated = !!(tmp & 0x0080);
 760                 stat.intermediate = !!(tmp & 0x0040);
 761                 stat.for_ampdu = !!(tmp & 0x0020);
 762                 stat.acked = !!(tmp & 0x0002);
 763
 764                 b43legacy_handle_txstatus(dev, &stat);
 765         }
 766 }
 767
 768 static void drain_txstatus_queue(struct b43legacy_wldev *dev)
 769 {
 770         u32 dummy;
 771
 772         if (dev->dev->id.revision < 5)
 773                 return;
 774         /* Read all entries from the microcode TXstatus FIFO
 775          * and throw them away.
 776          */
 777         while (1) {
 778                 dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
 779                 if (!(dummy & 0x00000001))
 780                         break;
 781                 dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
 782         }
 783 }
 784
 785 static u32 b43legacy_jssi_read(struct b43legacy_wldev *dev)
 786 {
 787         u32 val = 0;
 788
 789         val = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x40A);
 790         val <<= 16;
 791         val |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x408);
 792
 793         return val;
 794 }
 795
 796 static void b43legacy_jssi_write(struct b43legacy_wldev *dev, u32 jssi)
 797 {
 798         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x408,
 799                               (jssi & 0x0000FFFF));
 800         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x40A,
 801                               (jssi & 0xFFFF0000) >> 16);
 802 }
 803
 804 static void b43legacy_generate_noise_sample(struct b43legacy_wldev *dev)
 805 {
 806         b43legacy_jssi_write(dev, 0x7F7F7F7F);
 807         b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
 808                           b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
 809                           | B43legacy_MACCMD_BGNOISE);
 810         B43legacy_WARN_ON(dev->noisecalc.channel_at_start !=
 811                             dev->phy.channel);
 812 }
 813
 814 static void b43legacy_calculate_link_quality(struct b43legacy_wldev *dev)
 815 {
 816         /* Top half of Link Quality calculation. */
 817
 818         if (dev->noisecalc.calculation_running)
 819                 return;
 820         dev->noisecalc.channel_at_start = dev->phy.channel;
 821         dev->noisecalc.calculation_running = 1;
 822         dev->noisecalc.nr_samples = 0;
 823
 824         b43legacy_generate_noise_sample(dev);
 825 }
 826
 827 static void handle_irq_noise(struct b43legacy_wldev *dev)
 828 {
 829         struct b43legacy_phy *phy = &dev->phy;
 830         u16 tmp;
 831         u8 noise[4];
 832         u8 i;
 833         u8 j;
 834         s32 average;
 835
 836         /* Bottom half of Link Quality calculation. */
 837
 838         B43legacy_WARN_ON(!dev->noisecalc.calculation_running);
 839         if (dev->noisecalc.channel_at_start != phy->channel)
 840                 goto drop_calculation;
 841         *((__le32 *)noise) = cpu_to_le32(b43legacy_jssi_read(dev));
 842         if (noise[0] == 0x7F || noise[1] == 0x7F ||
 843             noise[2] == 0x7F || noise[3] == 0x7F)
 844                 goto generate_new;
 845
 846         /* Get the noise samples. */
 847         B43legacy_WARN_ON(dev->noisecalc.nr_samples >= 8);
 848         i = dev->noisecalc.nr_samples;
 849         noise[0] = limit_value(noise[0], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
 850         noise[1] = limit_value(noise[1], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
 851         noise[2] = limit_value(noise[2], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
 852         noise[3] = limit_value(noise[3], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
 853         dev->noisecalc.samples[i][0] = phy->nrssi_lt[noise[0]];
 854         dev->noisecalc.samples[i][1] = phy->nrssi_lt[noise[1]];
 855         dev->noisecalc.samples[i][2] = phy->nrssi_lt[noise[2]];
 856         dev->noisecalc.samples[i][3] = phy->nrssi_lt[noise[3]];
 857         dev->noisecalc.nr_samples++;
 858         if (dev->noisecalc.nr_samples == 8) {
 859                 /* Calculate the Link Quality by the noise samples. */
 860                 average = 0;
 861                 for (i = 0; i < 8; i++) {
 862                         for (j = 0; j < 4; j++)
 863                                 average += dev->noisecalc.samples[i][j];
 864                 }
 865                 average /= (8 * 4);
 866                 average *= 125;
 867                 average += 64;
 868                 average /= 128;
 869                 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
 870                                              0x40C);
 871                 tmp = (tmp / 128) & 0x1F;
 872                 if (tmp >= 8)
 873                         average += 2;
 874                 else
 875                         average -= 25;
 876                 if (tmp == 8)
 877                         average -= 72;
 878                 else
 879                         average -= 48;
 880
 881                 dev->stats.link_noise = average;
 882 drop_calculation:
 883                 dev->noisecalc.calculation_running = 0;
 884                 return;
 885         }
 886 generate_new:
 887         b43legacy_generate_noise_sample(dev);
 888 }
 889
 890 static void handle_irq_tbtt_indication(struct b43legacy_wldev *dev)
 891 {
 892         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_AP)) {
 893                 /* TODO: PS TBTT */
 894         } else {
 895                 if (1/*FIXME: the last PSpoll frame was sent successfully */)
 896                         b43legacy_power_saving_ctl_bits(dev, -1, -1);
 897         }
 898         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_IBSS))
 899                 dev->dfq_valid = 1;
 900 }
 901
 902 static void handle_irq_atim_end(struct b43legacy_wldev *dev)
 903 {
 904         if (dev->dfq_valid) {
 905                 b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
 906                                   b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
 907                                   | B43legacy_MACCMD_DFQ_VALID);
 908                 dev->dfq_valid = 0;
 909         }
 910 }
 911
 912 static void handle_irq_pmq(struct b43legacy_wldev *dev)
 913 {
 914         u32 tmp;
 915
 916         /* TODO: AP mode. */
 917
 918         while (1) {
 919                 tmp = b43legacy_read32(dev, B43legacy_MMIO_PS_STATUS);
 920                 if (!(tmp & 0x00000008))
 921                         break;
 922         }
 923         /* 16bit write is odd, but correct. */
 924         b43legacy_write16(dev, B43legacy_MMIO_PS_STATUS, 0x0002);
 925 }
 926
 927 static void b43legacy_write_template_common(struct b43legacy_wldev *dev,
 928                                             const u8 *data, u16 size,
 929                                             u16 ram_offset,
 930                                             u16 shm_size_offset, u8 rate)
 931 {
 932         u32 i;
 933         u32 tmp;
 934         struct b43legacy_plcp_hdr4 plcp;
 935
 936         plcp.data = 0;
 937         b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate);
 938         b43legacy_ram_write(dev, ram_offset, le32_to_cpu(plcp.data));
 939         ram_offset += sizeof(u32);
 940         /* The PLCP is 6 bytes long, but we only wrote 4 bytes, yet.
 941          * So leave the first two bytes of the next write blank.
 942          */
 943         tmp = (u32)(data[0]) << 16;
 944         tmp |= (u32)(data[1]) << 24;
 945         b43legacy_ram_write(dev, ram_offset, tmp);
 946         ram_offset += sizeof(u32);
 947         for (i = 2; i < size; i += sizeof(u32)) {
 948                 tmp = (u32)(data[i + 0]);
 949                 if (i + 1 < size)
 950                         tmp |= (u32)(data[i + 1]) << 8;
 951                 if (i + 2 < size)
 952                         tmp |= (u32)(data[i + 2]) << 16;
 953                 if (i + 3 < size)
 954                         tmp |= (u32)(data[i + 3]) << 24;
 955                 b43legacy_ram_write(dev, ram_offset + i - 2, tmp);
 956         }
 957         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_size_offset,
 958                               size + sizeof(struct b43legacy_plcp_hdr6));
 959 }
 960
 961 static void b43legacy_write_beacon_template(struct b43legacy_wldev *dev,
 962                                             u16 ram_offset,
 963                                             u16 shm_size_offset, u8 rate)
 964 {
 965
 966         unsigned int i, len, variable_len;
 967         const struct ieee80211_mgmt *bcn;
 968         const u8 *ie;
 969         bool tim_found = 0;
 970
 971         bcn = (const struct ieee80211_mgmt *)(dev->wl->current_beacon->data);
 972         len = min((size_t)dev->wl->current_beacon->len,
 973                   0x200 - sizeof(struct b43legacy_plcp_hdr6));
 974
 975         b43legacy_write_template_common(dev, (const u8 *)bcn, len, ram_offset,
 976                                         shm_size_offset, rate);
 977
 978         /* Find the position of the TIM and the DTIM_period value
 979          * and write them to SHM. */
 980         ie = bcn->u.beacon.variable;
 981         variable_len = len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
 982         for (i = 0; i < variable_len - 2; ) {
 983                 uint8_t ie_id, ie_len;
 984
 985                 ie_id = ie[i];
 986                 ie_len = ie[i + 1];
 987                 if (ie_id == 5) {
 988                         u16 tim_position;
 989                         u16 dtim_period;
 990                         /* This is the TIM Information Element */
 991
 992                         /* Check whether the ie_len is in the beacon data range. */
 993                         if (variable_len < ie_len + 2 + i)
 994                                 break;
 995                         /* A valid TIM is at least 4 bytes long. */
 996                         if (ie_len < 4)
 997                                 break;
 998                         tim_found = 1;
 999
1000                         tim_position = sizeof(struct b43legacy_plcp_hdr6);
1001                         tim_position += offsetof(struct ieee80211_mgmt,
1002                                                  u.beacon.variable);
1003                         tim_position += i;
1004
1005                         dtim_period = ie[i + 3];
1006
1007                         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1008                                         B43legacy_SHM_SH_TIMPOS, tim_position);
1009                         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1010                                         B43legacy_SHM_SH_DTIMP, dtim_period);
1011                         break;
1012                 }
1013                 i += ie_len + 2;
1014         }
1015         if (!tim_found) {
1016                 b43legacywarn(dev->wl, "Did not find a valid TIM IE in the "
1017                               "beacon template packet. AP or IBSS operation "
1018                               "may be broken.\n");
1019         }
1020 }
1021
1022 static void b43legacy_write_probe_resp_plcp(struct b43legacy_wldev *dev,
1023                                             u16 shm_offset, u16 size,
1024                                             struct ieee80211_rate *rate)
1025 {
1026         struct b43legacy_plcp_hdr4 plcp;
1027         u32 tmp;
1028         __le16 dur;
1029
1030         plcp.data = 0;
1031         b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate->bitrate);
1032         dur = ieee80211_generic_frame_duration(dev->wl->hw,
1033                                                dev->wl->vif,
1034                                                size,
1035                                                rate);
1036         /* Write PLCP in two parts and timing for packet transfer */
1037         tmp = le32_to_cpu(plcp.data);
1038         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset,
1039                               tmp & 0xFFFF);
1040         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 2,
1041                               tmp >> 16);
1042         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 6,
1043                               le16_to_cpu(dur));
1044 }
1045
1046 /* Instead of using custom probe response template, this function
1047  * just patches custom beacon template by:
1048  * 1) Changing packet type
1049  * 2) Patching duration field
1050  * 3) Stripping TIM
1051  */
1052 static const u8 *b43legacy_generate_probe_resp(struct b43legacy_wldev *dev,
1053                                                u16 *dest_size,
1054                                                struct ieee80211_rate *rate)
1055 {
1056         const u8 *src_data;
1057         u8 *dest_data;
1058         u16 src_size, elem_size, src_pos, dest_pos;
1059         __le16 dur;
1060         struct ieee80211_hdr *hdr;
1061         size_t ie_start;
1062
1063         src_size = dev->wl->current_beacon->len;
1064         src_data = (const u8 *)dev->wl->current_beacon->data;
1065
1066         /* Get the start offset of the variable IEs in the packet. */
1067         ie_start = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1068         B43legacy_WARN_ON(ie_start != offsetof(struct ieee80211_mgmt,
1069                                                u.beacon.variable));
1070
1071         if (B43legacy_WARN_ON(src_size < ie_start))
1072                 return NULL;
1073
1074         dest_data = kmalloc(src_size, GFP_ATOMIC);
1075         if (unlikely(!dest_data))
1076                 return NULL;
1077
1078         /* Copy the static data and all Information Elements, except the TIM. */
1079         memcpy(dest_data, src_data, ie_start);
1080         src_pos = ie_start;
1081         dest_pos = ie_start;
1082         for ( ; src_pos < src_size - 2; src_pos += elem_size) {
1083                 elem_size = src_data[src_pos + 1] + 2;
1084                 if (src_data[src_pos] == 5) {
1085                         /* This is the TIM. */
1086                         continue;
1087                 }
1088                 memcpy(dest_data + dest_pos, src_data + src_pos, elem_size);
1089                 dest_pos += elem_size;
1090         }
1091         *dest_size = dest_pos;
1092         hdr = (struct ieee80211_hdr *)dest_data;
1093
1094         /* Set the frame control. */
1095         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1096                                          IEEE80211_STYPE_PROBE_RESP);
1097         dur = ieee80211_generic_frame_duration(dev->wl->hw,
1098                                                dev->wl->vif,
1099                                                *dest_size,
1100                                                rate);
1101         hdr->duration_id = dur;
1102
1103         return dest_data;
1104 }
1105
1106 static void b43legacy_write_probe_resp_template(struct b43legacy_wldev *dev,
1107                                                 u16 ram_offset,
1108                                                 u16 shm_size_offset,
1109                                                 struct ieee80211_rate *rate)
1110 {
1111         const u8 *probe_resp_data;
1112         u16 size;
1113
1114         size = dev->wl->current_beacon->len;
1115         probe_resp_data = b43legacy_generate_probe_resp(dev, &size, rate);
1116         if (unlikely(!probe_resp_data))
1117                 return;
1118
1119         /* Looks like PLCP headers plus packet timings are stored for
1120          * all possible basic rates
1121          */
1122         b43legacy_write_probe_resp_plcp(dev, 0x31A, size,
1123                                         &b43legacy_b_ratetable[0]);
1124         b43legacy_write_probe_resp_plcp(dev, 0x32C, size,
1125                                         &b43legacy_b_ratetable[1]);
1126         b43legacy_write_probe_resp_plcp(dev, 0x33E, size,
1127                                         &b43legacy_b_ratetable[2]);
1128         b43legacy_write_probe_resp_plcp(dev, 0x350, size,
1129                                         &b43legacy_b_ratetable[3]);
1130
1131         size = min((size_t)size,
1132                    0x200 - sizeof(struct b43legacy_plcp_hdr6));
1133         b43legacy_write_template_common(dev, probe_resp_data,
1134                                         size, ram_offset,
1135                                         shm_size_offset, rate->bitrate);
1136         kfree(probe_resp_data);
1137 }
1138
1139 /* Asynchronously update the packet templates in template RAM.
1140  * Locking: Requires wl->irq_lock to be locked. */
1141 static void b43legacy_update_templates(struct b43legacy_wl *wl,
1142                                        struct sk_buff *beacon)
1143 {
1144         /* This is the top half of the ansynchronous beacon update. The bottom
1145          * half is the beacon IRQ. Beacon update must be asynchronous to avoid
1146          * sending an invalid beacon. This can happen for example, if the
1147          * firmware transmits a beacon while we are updating it. */
1148
1149         if (wl->current_beacon)
1150                 dev_kfree_skb_any(wl->current_beacon);
1151         wl->current_beacon = beacon;
1152         wl->beacon0_uploaded = 0;
1153         wl->beacon1_uploaded = 0;
1154 }
1155
1156 static void b43legacy_set_ssid(struct b43legacy_wldev *dev,
1157                                const u8 *ssid, u8 ssid_len)
1158 {
1159         u32 tmp;
1160         u16 i;
1161         u16 len;
1162
1163         len = min((u16)ssid_len, (u16)0x100);
1164         for (i = 0; i < len; i += sizeof(u32)) {
1165                 tmp = (u32)(ssid[i + 0]);
1166                 if (i + 1 < len)
1167                         tmp |= (u32)(ssid[i + 1]) << 8;
1168                 if (i + 2 < len)
1169                         tmp |= (u32)(ssid[i + 2]) << 16;
1170                 if (i + 3 < len)
1171                         tmp |= (u32)(ssid[i + 3]) << 24;
1172                 b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
1173                                       0x380 + i, tmp);
1174         }
1175         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1176                               0x48, len);
1177 }
1178
1179 static void b43legacy_set_beacon_int(struct b43legacy_wldev *dev,
1180                                      u16 beacon_int)
1181 {
1182         b43legacy_time_lock(dev);
1183         if (dev->dev->id.revision >= 3)
1184                 b43legacy_write32(dev, 0x188, (beacon_int << 16));
1185         else {
1186                 b43legacy_write16(dev, 0x606, (beacon_int >> 6));
1187                 b43legacy_write16(dev, 0x610, beacon_int);
1188         }
1189         b43legacy_time_unlock(dev);
1190 }
1191
1192 static void handle_irq_beacon(struct b43legacy_wldev *dev)
1193 {
1194         struct b43legacy_wl *wl = dev->wl;
1195         u32 cmd;
1196
1197         if (!b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP))
1198                 return;
1199
1200         /* This is the bottom half of the asynchronous beacon update. */
1201
1202         cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1203         if (!(cmd & B43legacy_MACCMD_BEACON0_VALID)) {
1204                 if (!wl->beacon0_uploaded) {
1205                         b43legacy_write_beacon_template(dev, 0x68,
1206                                                         B43legacy_SHM_SH_BTL0,
1207                                                         B43legacy_CCK_RATE_1MB);
1208                         b43legacy_write_probe_resp_template(dev, 0x268,
1209                                                             B43legacy_SHM_SH_PRTLEN,
1210                                                             &__b43legacy_ratetable[3]);
1211                         wl->beacon0_uploaded = 1;
1212                 }
1213                 cmd |= B43legacy_MACCMD_BEACON0_VALID;
1214         }
1215         if (!(cmd & B43legacy_MACCMD_BEACON1_VALID)) {
1216                 if (!wl->beacon1_uploaded) {
1217                         b43legacy_write_beacon_template(dev, 0x468,
1218                                                         B43legacy_SHM_SH_BTL1,
1219                                                         B43legacy_CCK_RATE_1MB);
1220                         wl->beacon1_uploaded = 1;
1221                 }
1222                 cmd |= B43legacy_MACCMD_BEACON1_VALID;
1223         }
1224         b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1225 }
1226
1227 static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
1228 {
1229 }
1230
1231 /* Interrupt handler bottom-half */
1232 static void b43legacy_interrupt_tasklet(struct b43legacy_wldev *dev)
1233 {
1234         u32 reason;
1235         u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
1236         u32 merged_dma_reason = 0;
1237         int i;
1238         unsigned long flags;
1239
1240         spin_lock_irqsave(&dev->wl->irq_lock, flags);
1241
1242         B43legacy_WARN_ON(b43legacy_status(dev) <
1243                           B43legacy_STAT_INITIALIZED);
1244
1245         reason = dev->irq_reason;
1246         for (i = 0; i < ARRAY_SIZE(dma_reason); i++) {
1247                 dma_reason[i] = dev->dma_reason[i];
1248                 merged_dma_reason |= dma_reason[i];
1249         }
1250
1251         if (unlikely(reason & B43legacy_IRQ_MAC_TXERR))
1252                 b43legacyerr(dev->wl, "MAC transmission error\n");
1253
1254         if (unlikely(reason & B43legacy_IRQ_PHY_TXERR)) {
1255                 b43legacyerr(dev->wl, "PHY transmission error\n");
1256                 rmb();
1257                 if (unlikely(atomic_dec_and_test(&dev->phy.txerr_cnt))) {
1258                         b43legacyerr(dev->wl, "Too many PHY TX errors, "
1259                                               "restarting the controller\n");
1260                         b43legacy_controller_restart(dev, "PHY TX errors");
1261                 }
1262         }
1263
1264         if (unlikely(merged_dma_reason & (B43legacy_DMAIRQ_FATALMASK |
1265                                           B43legacy_DMAIRQ_NONFATALMASK))) {
1266                 if (merged_dma_reason & B43legacy_DMAIRQ_FATALMASK) {
1267                         b43legacyerr(dev->wl, "Fatal DMA error: "
1268                                "0x%08X, 0x%08X, 0x%08X, "
1269                                "0x%08X, 0x%08X, 0x%08X\n",
1270                                dma_reason[0], dma_reason[1],
1271                                dma_reason[2], dma_reason[3],
1272                                dma_reason[4], dma_reason[5]);
1273                         b43legacy_controller_restart(dev, "DMA error");
1274                         mmiowb();
1275                         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1276                         return;
1277                 }
1278                 if (merged_dma_reason & B43legacy_DMAIRQ_NONFATALMASK)
1279                         b43legacyerr(dev->wl, "DMA error: "
1280                                "0x%08X, 0x%08X, 0x%08X, "
1281                                "0x%08X, 0x%08X, 0x%08X\n",
1282                                dma_reason[0], dma_reason[1],
1283                                dma_reason[2], dma_reason[3],
1284                                dma_reason[4], dma_reason[5]);
1285         }
1286
1287         if (unlikely(reason & B43legacy_IRQ_UCODE_DEBUG))
1288                 handle_irq_ucode_debug(dev);
1289         if (reason & B43legacy_IRQ_TBTT_INDI)
1290                 handle_irq_tbtt_indication(dev);
1291         if (reason & B43legacy_IRQ_ATIM_END)
1292                 handle_irq_atim_end(dev);
1293         if (reason & B43legacy_IRQ_BEACON)
1294                 handle_irq_beacon(dev);
1295         if (reason & B43legacy_IRQ_PMQ)
1296                 handle_irq_pmq(dev);
1297         if (reason & B43legacy_IRQ_TXFIFO_FLUSH_OK)
1298                 ;/*TODO*/
1299         if (reason & B43legacy_IRQ_NOISESAMPLE_OK)
1300                 handle_irq_noise(dev);
1301
1302         /* Check the DMA reason registers for received data. */
1303         if (dma_reason[0] & B43legacy_DMAIRQ_RX_DONE) {
1304                 if (b43legacy_using_pio(dev))
1305                         b43legacy_pio_rx(dev->pio.queue0);
1306                 else
1307                         b43legacy_dma_rx(dev->dma.rx_ring0);
1308         }
1309         B43legacy_WARN_ON(dma_reason[1] & B43legacy_DMAIRQ_RX_DONE);
1310         B43legacy_WARN_ON(dma_reason[2] & B43legacy_DMAIRQ_RX_DONE);
1311         if (dma_reason[3] & B43legacy_DMAIRQ_RX_DONE) {
1312                 if (b43legacy_using_pio(dev))
1313                         b43legacy_pio_rx(dev->pio.queue3);
1314                 else
1315                         b43legacy_dma_rx(dev->dma.rx_ring3);
1316         }
1317         B43legacy_WARN_ON(dma_reason[4] & B43legacy_DMAIRQ_RX_DONE);
1318         B43legacy_WARN_ON(dma_reason[5] & B43legacy_DMAIRQ_RX_DONE);
1319
1320         if (reason & B43legacy_IRQ_TX_OK)
1321                 handle_irq_transmit_status(dev);
1322
1323         b43legacy_interrupt_enable(dev, dev->irq_savedstate);
1324         mmiowb();
1325         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1326 }
1327
1328 static void pio_irq_workaround(struct b43legacy_wldev *dev,
1329                                u16 base, int queueidx)
1330 {
1331         u16 rxctl;
1332
1333         rxctl = b43legacy_read16(dev, base + B43legacy_PIO_RXCTL);
1334         if (rxctl & B43legacy_PIO_RXCTL_DATAAVAILABLE)
1335                 dev->dma_reason[queueidx] |= B43legacy_DMAIRQ_RX_DONE;
1336         else
1337                 dev->dma_reason[queueidx] &= ~B43legacy_DMAIRQ_RX_DONE;
1338 }
1339
1340 static void b43legacy_interrupt_ack(struct b43legacy_wldev *dev, u32 reason)
1341 {
1342         if (b43legacy_using_pio(dev) &&
1343             (dev->dev->id.revision < 3) &&
1344             (!(reason & B43legacy_IRQ_PIO_WORKAROUND))) {
1345                 /* Apply a PIO specific workaround to the dma_reasons */
1346                 pio_irq_workaround(dev, B43legacy_MMIO_PIO1_BASE, 0);
1347                 pio_irq_workaround(dev, B43legacy_MMIO_PIO2_BASE, 1);
1348                 pio_irq_workaround(dev, B43legacy_MMIO_PIO3_BASE, 2);
1349                 pio_irq_workaround(dev, B43legacy_MMIO_PIO4_BASE, 3);
1350         }
1351
1352         b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, reason);
1353
1354         b43legacy_write32(dev, B43legacy_MMIO_DMA0_REASON,
1355                           dev->dma_reason[0]);
1356         b43legacy_write32(dev, B43legacy_MMIO_DMA1_REASON,
1357                           dev->dma_reason[1]);
1358         b43legacy_write32(dev, B43legacy_MMIO_DMA2_REASON,
1359                           dev->dma_reason[2]);
1360         b43legacy_write32(dev, B43legacy_MMIO_DMA3_REASON,
1361                           dev->dma_reason[3]);
1362         b43legacy_write32(dev, B43legacy_MMIO_DMA4_REASON,
1363                           dev->dma_reason[4]);
1364         b43legacy_write32(dev, B43legacy_MMIO_DMA5_REASON,
1365                           dev->dma_reason[5]);
1366 }
1367
1368 /* Interrupt handler top-half */
1369 static irqreturn_t b43legacy_interrupt_handler(int irq, void *dev_id)
1370 {
1371         irqreturn_t ret = IRQ_NONE;
1372         struct b43legacy_wldev *dev = dev_id;
1373         u32 reason;
1374
1375         if (!dev)
1376                 return IRQ_NONE;
1377
1378         spin_lock(&dev->wl->irq_lock);
1379
1380         if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
1381                 goto out;
1382         reason = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1383         if (reason == 0xffffffff) /* shared IRQ */
1384                 goto out;
1385         ret = IRQ_HANDLED;
1386         reason &= b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK);
1387         if (!reason)
1388                 goto out;
1389
1390         dev->dma_reason[0] = b43legacy_read32(dev,
1391                                               B43legacy_MMIO_DMA0_REASON)
1392                                               & 0x0001DC00;
1393         dev->dma_reason[1] = b43legacy_read32(dev,
1394                                               B43legacy_MMIO_DMA1_REASON)
1395                                               & 0x0000DC00;
1396         dev->dma_reason[2] = b43legacy_read32(dev,
1397                                               B43legacy_MMIO_DMA2_REASON)
1398                                               & 0x0000DC00;
1399         dev->dma_reason[3] = b43legacy_read32(dev,
1400                                               B43legacy_MMIO_DMA3_REASON)
1401                                               & 0x0001DC00;
1402         dev->dma_reason[4] = b43legacy_read32(dev,
1403                                               B43legacy_MMIO_DMA4_REASON)
1404                                               & 0x0000DC00;
1405         dev->dma_reason[5] = b43legacy_read32(dev,
1406                                               B43legacy_MMIO_DMA5_REASON)
1407                                               & 0x0000DC00;
1408
1409         b43legacy_interrupt_ack(dev, reason);
1410         /* disable all IRQs. They are enabled again in the bottom half. */
1411         dev->irq_savedstate = b43legacy_interrupt_disable(dev,
1412                                                           B43legacy_IRQ_ALL);
1413         /* save the reason code and call our bottom half. */
1414         dev->irq_reason = reason;
1415         tasklet_schedule(&dev->isr_tasklet);
1416 out:
1417         mmiowb();
1418         spin_unlock(&dev->wl->irq_lock);
1419
1420         return ret;
1421 }
1422
1423 static void b43legacy_release_firmware(struct b43legacy_wldev *dev)
1424 {
1425         release_firmware(dev->fw.ucode);
1426         dev->fw.ucode = NULL;
1427         release_firmware(dev->fw.pcm);
1428         dev->fw.pcm = NULL;
1429         release_firmware(dev->fw.initvals);
1430         dev->fw.initvals = NULL;
1431         release_firmware(dev->fw.initvals_band);
1432         dev->fw.initvals_band = NULL;
1433 }
1434
1435 static void b43legacy_print_fw_helptext(struct b43legacy_wl *wl)
1436 {
1437         b43legacyerr(wl, "You must go to http://linuxwireless.org/en/users/"
1438                      "Drivers/b43#devicefirmware "
1439                      "and download the correct firmware (version 3).\n");
1440 }
1441
1442 static int do_request_fw(struct b43legacy_wldev *dev,
1443                          const char *name,
1444                          const struct firmware **fw)
1445 {
1446         char path[sizeof(modparam_fwpostfix) + 32];
1447         struct b43legacy_fw_header *hdr;
1448         u32 size;
1449         int err;
1450
1451         if (!name)
1452                 return 0;
1453
1454         snprintf(path, ARRAY_SIZE(path),
1455                  "b43legacy%s/%s.fw",
1456                  modparam_fwpostfix, name);
1457         err = request_firmware(fw, path, dev->dev->dev);
1458         if (err) {
1459                 b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
1460                        "or load failed.\n", path);
1461                 return err;
1462         }
1463         if ((*fw)->size < sizeof(struct b43legacy_fw_header))
1464                 goto err_format;
1465         hdr = (struct b43legacy_fw_header *)((*fw)->data);
1466         switch (hdr->type) {
1467         case B43legacy_FW_TYPE_UCODE:
1468         case B43legacy_FW_TYPE_PCM:
1469                 size = be32_to_cpu(hdr->size);
1470                 if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
1471                         goto err_format;
1472                 /* fallthrough */
1473         case B43legacy_FW_TYPE_IV:
1474                 if (hdr->ver != 1)
1475                         goto err_format;
1476                 break;
1477         default:
1478                 goto err_format;
1479         }
1480
1481         return err;
1482
1483 err_format:
1484         b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
1485         return -EPROTO;
1486 }
1487
1488 static int b43legacy_request_firmware(struct b43legacy_wldev *dev)
1489 {
1490         struct b43legacy_firmware *fw = &dev->fw;
1491         const u8 rev = dev->dev->id.revision;
1492         const char *filename;
1493         u32 tmshigh;
1494         int err;
1495
1496         tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
1497         if (!fw->ucode) {
1498                 if (rev == 2)
1499                         filename = "ucode2";
1500                 else if (rev == 4)
1501                         filename = "ucode4";
1502                 else
1503                         filename = "ucode5";
1504                 err = do_request_fw(dev, filename, &fw->ucode);
1505                 if (err)
1506                         goto err_load;
1507         }
1508         if (!fw->pcm) {
1509                 if (rev < 5)
1510                         filename = "pcm4";
1511                 else
1512                         filename = "pcm5";
1513                 err = do_request_fw(dev, filename, &fw->pcm);
1514                 if (err)
1515                         goto err_load;
1516         }
1517         if (!fw->initvals) {
1518                 switch (dev->phy.type) {
1519                 case B43legacy_PHYTYPE_B:
1520                 case B43legacy_PHYTYPE_G:
1521                         if ((rev >= 5) && (rev <= 10))
1522                                 filename = "b0g0initvals5";
1523                         else if (rev == 2 || rev == 4)
1524                                 filename = "b0g0initvals2";
1525                         else
1526                                 goto err_no_initvals;
1527                         break;
1528                 default:
1529                         goto err_no_initvals;
1530                 }
1531                 err = do_request_fw(dev, filename, &fw->initvals);
1532                 if (err)
1533                         goto err_load;
1534         }
1535         if (!fw->initvals_band) {
1536                 switch (dev->phy.type) {
1537                 case B43legacy_PHYTYPE_B:
1538                 case B43legacy_PHYTYPE_G:
1539                         if ((rev >= 5) && (rev <= 10))
1540                                 filename = "b0g0bsinitvals5";
1541                         else if (rev >= 11)
1542                                 filename = NULL;
1543                         else if (rev == 2 || rev == 4)
1544                                 filename = NULL;
1545                         else
1546                                 goto err_no_initvals;
1547                         break;
1548                 default:
1549                         goto err_no_initvals;
1550                 }
1551                 err = do_request_fw(dev, filename, &fw->initvals_band);
1552                 if (err)
1553                         goto err_load;
1554         }
1555
1556         return 0;
1557
1558 err_load:
1559         b43legacy_print_fw_helptext(dev->wl);
1560         goto error;
1561
1562 err_no_initvals:
1563         err = -ENODEV;
1564         b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
1565                "core rev %u\n", dev->phy.type, rev);
1566         goto error;
1567
1568 error:
1569         b43legacy_release_firmware(dev);
1570         return err;
1571 }
1572
1573 static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
1574 {
1575         const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1576         const __be32 *data;
1577         unsigned int i;
1578         unsigned int len;
1579         u16 fwrev;
1580         u16 fwpatch;
1581         u16 fwdate;
1582         u16 fwtime;
1583         u32 tmp, macctl;
1584         int err = 0;
1585
1586         /* Jump the microcode PSM to offset 0 */
1587         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1588         B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
1589         macctl |= B43legacy_MACCTL_PSM_JMP0;
1590         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1591         /* Zero out all microcode PSM registers and shared memory. */
1592         for (i = 0; i < 64; i++)
1593                 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
1594         for (i = 0; i < 4096; i += 2)
1595                 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);
1596
1597         /* Upload Microcode. */
1598         data = (__be32 *) (dev->fw.ucode->data + hdr_len);
1599         len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
1600         b43legacy_shm_control_word(dev,
1601                                    B43legacy_SHM_UCODE |
1602                                    B43legacy_SHM_AUTOINC_W,
1603                                    0x0000);
1604         for (i = 0; i < len; i++) {
1605                 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1606                                     be32_to_cpu(data[i]));
1607                 udelay(10);
1608         }
1609
1610         if (dev->fw.pcm) {
1611                 /* Upload PCM data. */
1612                 data = (__be32 *) (dev->fw.pcm->data + hdr_len);
1613                 len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
1614                 b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
1615                 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
1616                 /* No need for autoinc bit in SHM_HW */
1617                 b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
1618                 for (i = 0; i < len; i++) {
1619                         b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1620                                           be32_to_cpu(data[i]));
1621                         udelay(10);
1622                 }
1623         }
1624
1625         b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1626                           B43legacy_IRQ_ALL);
1627
1628         /* Start the microcode PSM */
1629         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1630         macctl &= ~B43legacy_MACCTL_PSM_JMP0;
1631         macctl |= B43legacy_MACCTL_PSM_RUN;
1632         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1633
1634         /* Wait for the microcode to load and respond */
1635         i = 0;
1636         while (1) {
1637                 tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1638                 if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
1639                         break;
1640                 i++;
1641                 if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
1642                         b43legacyerr(dev->wl, "Microcode not responding\n");
1643                         b43legacy_print_fw_helptext(dev->wl);
1644                         err = -ENODEV;
1645                         goto error;
1646                 }
1647                 msleep_interruptible(50);
1648                 if (signal_pending(current)) {
1649                         err = -EINTR;
1650                         goto error;
1651                 }
1652         }
1653         /* dummy read follows */
1654         b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1655
1656         /* Get and check the revisions. */
1657         fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1658                                      B43legacy_SHM_SH_UCODEREV);
1659         fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1660                                        B43legacy_SHM_SH_UCODEPATCH);
1661         fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1662                                       B43legacy_SHM_SH_UCODEDATE);
1663         fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1664                                       B43legacy_SHM_SH_UCODETIME);
1665
1666         if (fwrev > 0x128) {
1667                 b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
1668                              " Only firmware from binary drivers version 3.x"
1669                              " is supported. You must change your firmware"
1670                              " files.\n");
1671                 b43legacy_print_fw_helptext(dev->wl);
1672                 err = -EOPNOTSUPP;
1673                 goto error;
1674         }
1675         b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
1676                       "(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
1677                       (fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
1678                       (fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
1679                       fwtime & 0x1F);
1680
1681         dev->fw.rev = fwrev;
1682         dev->fw.patch = fwpatch;
1683
1684         return 0;
1685
1686 error:
1687         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1688         macctl &= ~B43legacy_MACCTL_PSM_RUN;
1689         macctl |= B43legacy_MACCTL_PSM_JMP0;
1690         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1691
1692         return err;
1693 }
1694
1695 static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
1696                                     const struct b43legacy_iv *ivals,
1697                                     size_t count,
1698                                     size_t array_size)
1699 {
1700         const struct b43legacy_iv *iv;
1701         u16 offset;
1702         size_t i;
1703         bool bit32;
1704
1705         BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
1706         iv = ivals;
1707         for (i = 0; i < count; i++) {
1708                 if (array_size < sizeof(iv->offset_size))
1709                         goto err_format;
1710                 array_size -= sizeof(iv->offset_size);
1711                 offset = be16_to_cpu(iv->offset_size);
1712                 bit32 = !!(offset & B43legacy_IV_32BIT);
1713                 offset &= B43legacy_IV_OFFSET_MASK;
1714                 if (offset >= 0x1000)
1715                         goto err_format;
1716                 if (bit32) {
1717                         u32 value;
1718
1719                         if (array_size < sizeof(iv->data.d32))
1720                                 goto err_format;
1721                         array_size -= sizeof(iv->data.d32);
1722
1723                         value = get_unaligned_be32(&iv->data.d32);
1724                         b43legacy_write32(dev, offset, value);
1725
1726                         iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1727                                                         sizeof(__be16) +
1728                                                         sizeof(__be32));
1729                 } else {
1730                         u16 value;
1731
1732                         if (array_size < sizeof(iv->data.d16))
1733                                 goto err_format;
1734                         array_size -= sizeof(iv->data.d16);
1735
1736                         value = be16_to_cpu(iv->data.d16);
1737                         b43legacy_write16(dev, offset, value);
1738
1739                         iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1740                                                         sizeof(__be16) +
1741                                                         sizeof(__be16));
1742                 }
1743         }
1744         if (array_size)
1745                 goto err_format;
1746
1747         return 0;
1748
1749 err_format:
1750         b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
1751         b43legacy_print_fw_helptext(dev->wl);
1752
1753         return -EPROTO;
1754 }
1755
1756 static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
1757 {
1758         const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1759         const struct b43legacy_fw_header *hdr;
1760         struct b43legacy_firmware *fw = &dev->fw;
1761         const struct b43legacy_iv *ivals;
1762         size_t count;
1763         int err;
1764
1765         hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
1766         ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
1767         count = be32_to_cpu(hdr->size);
1768         err = b43legacy_write_initvals(dev, ivals, count,
1769                                  fw->initvals->size - hdr_len);
1770         if (err)
1771                 goto out;
1772         if (fw->initvals_band) {
1773                 hdr = (const struct b43legacy_fw_header *)
1774                       (fw->initvals_band->data);
1775                 ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
1776                         + hdr_len);
1777                 count = be32_to_cpu(hdr->size);
1778                 err = b43legacy_write_initvals(dev, ivals, count,
1779                                          fw->initvals_band->size - hdr_len);
1780                 if (err)
1781                         goto out;
1782         }
1783 out:
1784
1785         return err;
1786 }
1787
1788 /* Initialize the GPIOs
1789  * http://bcm-specs.sipsolutions.net/GPIO
1790  */
1791 static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
1792 {
1793         struct ssb_bus *bus = dev->dev->bus;
1794         struct ssb_device *gpiodev, *pcidev = NULL;
1795         u32 mask;
1796         u32 set;
1797
1798         b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1799                           b43legacy_read32(dev,
1800                           B43legacy_MMIO_MACCTL)
1801                           & 0xFFFF3FFF);
1802
1803         b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1804                           b43legacy_read16(dev,
1805                           B43legacy_MMIO_GPIO_MASK)
1806                           | 0x000F);
1807
1808         mask = 0x0000001F;
1809         set = 0x0000000F;
1810         if (dev->dev->bus->chip_id == 0x4301) {
1811                 mask |= 0x0060;
1812                 set |= 0x0060;
1813         }
1814         if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
1815                 b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1816                                   b43legacy_read16(dev,
1817                                   B43legacy_MMIO_GPIO_MASK)
1818                                   | 0x0200);
1819                 mask |= 0x0200;
1820                 set |= 0x0200;
1821         }
1822         if (dev->dev->id.revision >= 2)
1823                 mask  |= 0x0010; /* FIXME: This is redundant. */
1824
1825 #ifdef CONFIG_SSB_DRIVER_PCICORE
1826         pcidev = bus->pcicore.dev;
1827 #endif
1828         gpiodev = bus->chipco.dev ? : pcidev;
1829         if (!gpiodev)
1830                 return 0;
1831         ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
1832                     (ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
1833                      & mask) | set);
1834
1835         return 0;
1836 }
1837
1838 /* Turn off all GPIO stuff. Call this on module unload, for example. */
1839 static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
1840 {
1841         struct ssb_bus *bus = dev->dev->bus;
1842         struct ssb_device *gpiodev, *pcidev = NULL;
1843
1844 #ifdef CONFIG_SSB_DRIVER_PCICORE
1845         pcidev = bus->pcicore.dev;
1846 #endif
1847         gpiodev = bus->chipco.dev ? : pcidev;
1848         if (!gpiodev)
1849                 return;
1850         ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
1851 }
1852
1853 /* http://bcm-specs.sipsolutions.net/EnableMac */
1854 void b43legacy_mac_enable(struct b43legacy_wldev *dev)
1855 {
1856         dev->mac_suspended--;
1857         B43legacy_WARN_ON(dev->mac_suspended < 0);
1858         B43legacy_WARN_ON(irqs_disabled());
1859         if (dev->mac_suspended == 0) {
1860                 b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1861                                   b43legacy_read32(dev,
1862                                   B43legacy_MMIO_MACCTL)
1863                                   | B43legacy_MACCTL_ENABLED);
1864                 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1865                                   B43legacy_IRQ_MAC_SUSPENDED);
1866                 /* the next two are dummy reads */
1867                 b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1868                 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1869                 b43legacy_power_saving_ctl_bits(dev, -1, -1);
1870
1871                 /* Re-enable IRQs. */
1872                 spin_lock_irq(&dev->wl->irq_lock);
1873                 b43legacy_interrupt_enable(dev, dev->irq_savedstate);
1874                 spin_unlock_irq(&dev->wl->irq_lock);
1875         }
1876 }
1877
1878 /* http://bcm-specs.sipsolutions.net/SuspendMAC */
1879 void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
1880 {
1881         int i;
1882         u32 tmp;
1883
1884         might_sleep();
1885         B43legacy_WARN_ON(irqs_disabled());
1886         B43legacy_WARN_ON(dev->mac_suspended < 0);
1887
1888         if (dev->mac_suspended == 0) {
1889                 /* Mask IRQs before suspending MAC. Otherwise
1890                  * the MAC stays busy and won't suspend. */
1891                 spin_lock_irq(&dev->wl->irq_lock);
1892                 tmp = b43legacy_interrupt_disable(dev, B43legacy_IRQ_ALL);
1893                 spin_unlock_irq(&dev->wl->irq_lock);
1894                 b43legacy_synchronize_irq(dev);
1895                 dev->irq_savedstate = tmp;
1896
1897                 b43legacy_power_saving_ctl_bits(dev, -1, 1);
1898                 b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1899                                   b43legacy_read32(dev,
1900                                   B43legacy_MMIO_MACCTL)
1901                                   & ~B43legacy_MACCTL_ENABLED);
1902                 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1903                 for (i = 40; i; i--) {
1904                         tmp = b43legacy_read32(dev,
1905                                                B43legacy_MMIO_GEN_IRQ_REASON);
1906                         if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
1907                                 goto out;
1908                         msleep(1);
1909                 }
1910                 b43legacyerr(dev->wl, "MAC suspend failed\n");
1911         }
1912 out:
1913         dev->mac_suspended++;
1914 }
1915
1916 static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
1917 {
1918         struct b43legacy_wl *wl = dev->wl;
1919         u32 ctl;
1920         u16 cfp_pretbtt;
1921
1922         ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1923         /* Reset status to STA infrastructure mode. */
1924         ctl &= ~B43legacy_MACCTL_AP;
1925         ctl &= ~B43legacy_MACCTL_KEEP_CTL;
1926         ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
1927         ctl &= ~B43legacy_MACCTL_KEEP_BAD;
1928         ctl &= ~B43legacy_MACCTL_PROMISC;
1929         ctl &= ~B43legacy_MACCTL_BEACPROMISC;
1930         ctl |= B43legacy_MACCTL_INFRA;
1931
1932         if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP))
1933                 ctl |= B43legacy_MACCTL_AP;
1934         else if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_IBSS))
1935                 ctl &= ~B43legacy_MACCTL_INFRA;
1936
1937         if (wl->filter_flags & FIF_CONTROL)
1938                 ctl |= B43legacy_MACCTL_KEEP_CTL;
1939         if (wl->filter_flags & FIF_FCSFAIL)
1940                 ctl |= B43legacy_MACCTL_KEEP_BAD;
1941         if (wl->filter_flags & FIF_PLCPFAIL)
1942                 ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
1943         if (wl->filter_flags & FIF_PROMISC_IN_BSS)
1944                 ctl |= B43legacy_MACCTL_PROMISC;
1945         if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
1946                 ctl |= B43legacy_MACCTL_BEACPROMISC;
1947
1948         /* Workaround: On old hardware the HW-MAC-address-filter
1949          * doesn't work properly, so always run promisc in filter
1950          * it in software. */
1951         if (dev->dev->id.revision <= 4)
1952                 ctl |= B43legacy_MACCTL_PROMISC;
1953
1954         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);
1955
1956         cfp_pretbtt = 2;
1957         if ((ctl & B43legacy_MACCTL_INFRA) &&
1958             !(ctl & B43legacy_MACCTL_AP)) {
1959                 if (dev->dev->bus->chip_id == 0x4306 &&
1960                     dev->dev->bus->chip_rev == 3)
1961                         cfp_pretbtt = 100;
1962                 else
1963                         cfp_pretbtt = 50;
1964         }
1965         b43legacy_write16(dev, 0x612, cfp_pretbtt);
1966 }
1967
1968 static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
1969                                         u16 rate,
1970                                         int is_ofdm)
1971 {
1972         u16 offset;
1973
1974         if (is_ofdm) {
1975                 offset = 0x480;
1976                 offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
1977         } else {
1978                 offset = 0x4C0;
1979                 offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
1980         }
1981         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
1982                               b43legacy_shm_read16(dev,
1983                               B43legacy_SHM_SHARED, offset));
1984 }
1985
1986 static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
1987 {
1988         switch (dev->phy.type) {
1989         case B43legacy_PHYTYPE_G:
1990                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
1991                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
1992                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
1993                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
1994                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
1995                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
1996                 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
1997                 /* fallthrough */
1998         case B43legacy_PHYTYPE_B:
1999                 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
2000                 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
2001                 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
2002                 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
2003                 break;
2004         default:
2005                 B43legacy_BUG_ON(1);
2006         }
2007 }
2008
2009 /* Set the TX-Antenna for management frames sent by firmware. */
2010 static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
2011                                           int antenna)
2012 {
2013         u16 ant = 0;
2014         u16 tmp;
2015
2016         switch (antenna) {
2017         case B43legacy_ANTENNA0:
2018                 ant |= B43legacy_TX4_PHY_ANT0;
2019                 break;
2020         case B43legacy_ANTENNA1:
2021                 ant |= B43legacy_TX4_PHY_ANT1;
2022                 break;
2023         case B43legacy_ANTENNA_AUTO:
2024                 ant |= B43legacy_TX4_PHY_ANTLAST;
2025                 break;
2026         default:
2027                 B43legacy_BUG_ON(1);
2028         }
2029
2030         /* FIXME We also need to set the other flags of the PHY control
2031          * field somewhere. */
2032
2033         /* For Beacons */
2034         tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2035                                    B43legacy_SHM_SH_BEACPHYCTL);
2036         tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2037         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2038                               B43legacy_SHM_SH_BEACPHYCTL, tmp);
2039         /* For ACK/CTS */
2040         tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2041                                    B43legacy_SHM_SH_ACKCTSPHYCTL);
2042         tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2043         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2044                               B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
2045         /* For Probe Resposes */
2046         tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2047                                    B43legacy_SHM_SH_PRPHYCTL);
2048         tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2049         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2050                               B43legacy_SHM_SH_PRPHYCTL, tmp);
2051 }
2052
2053 /* This is the opposite of b43legacy_chip_init() */
2054 static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
2055 {
2056         b43legacy_radio_turn_off(dev, 1);
2057         b43legacy_gpio_cleanup(dev);
2058         /* firmware is released later */
2059 }
2060
2061 /* Initialize the chip
2062  * http://bcm-specs.sipsolutions.net/ChipInit
2063  */
2064 static int b43legacy_chip_init(struct b43legacy_wldev *dev)
2065 {
2066         struct b43legacy_phy *phy = &dev->phy;
2067         int err;
2068         int tmp;
2069         u32 value32, macctl;
2070         u16 value16;
2071
2072         /* Initialize the MAC control */
2073         macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
2074         if (dev->phy.gmode)
2075                 macctl |= B43legacy_MACCTL_GMODE;
2076         macctl |= B43legacy_MACCTL_INFRA;
2077         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
2078
2079         err = b43legacy_request_firmware(dev);
2080         if (err)
2081                 goto out;
2082         err = b43legacy_upload_microcode(dev);
2083         if (err)
2084                 goto out; /* firmware is released later */
2085
2086         err = b43legacy_gpio_init(dev);
2087         if (err)
2088                 goto out; /* firmware is released later */
2089
2090         err = b43legacy_upload_initvals(dev);
2091         if (err)
2092                 goto err_gpio_clean;
2093         b43legacy_radio_turn_on(dev);
2094
2095         b43legacy_write16(dev, 0x03E6, 0x0000);
2096         err = b43legacy_phy_init(dev);
2097         if (err)
2098                 goto err_radio_off;
2099
2100         /* Select initial Interference Mitigation. */
2101         tmp = phy->interfmode;
2102         phy->interfmode = B43legacy_INTERFMODE_NONE;
2103         b43legacy_radio_set_interference_mitigation(dev, tmp);
2104
2105         b43legacy_phy_set_antenna_diversity(dev);
2106         b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);
2107
2108         if (phy->type == B43legacy_PHYTYPE_B) {
2109                 value16 = b43legacy_read16(dev, 0x005E);
2110                 value16 |= 0x0004;
2111                 b43legacy_write16(dev, 0x005E, value16);
2112         }
2113         b43legacy_write32(dev, 0x0100, 0x01000000);
2114         if (dev->dev->id.revision < 5)
2115                 b43legacy_write32(dev, 0x010C, 0x01000000);
2116
2117         value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2118         value32 &= ~B43legacy_MACCTL_INFRA;
2119         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2120         value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2121         value32 |= B43legacy_MACCTL_INFRA;
2122         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2123
2124         if (b43legacy_using_pio(dev)) {
2125                 b43legacy_write32(dev, 0x0210, 0x00000100);
2126                 b43legacy_write32(dev, 0x0230, 0x00000100);
2127                 b43legacy_write32(dev, 0x0250, 0x00000100);
2128                 b43legacy_write32(dev, 0x0270, 0x00000100);
2129                 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
2130                                       0x0000);
2131         }
2132
2133         /* Probe Response Timeout value */
2134         /* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
2135         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);
2136
2137         /* Initially set the wireless operation mode. */
2138         b43legacy_adjust_opmode(dev);
2139
2140         if (dev->dev->id.revision < 3) {
2141                 b43legacy_write16(dev, 0x060E, 0x0000);
2142                 b43legacy_write16(dev, 0x0610, 0x8000);
2143                 b43legacy_write16(dev, 0x0604, 0x0000);
2144                 b43legacy_write16(dev, 0x0606, 0x0200);
2145         } else {
2146                 b43legacy_write32(dev, 0x0188, 0x80000000);
2147                 b43legacy_write32(dev, 0x018C, 0x02000000);
2148         }
2149         b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
2150         b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
2151         b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
2152         b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
2153         b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
2154         b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
2155         b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);
2156
2157         value32 = ssb_read32(dev->dev, SSB_TMSLOW);
2158         value32 |= 0x00100000;
2159         ssb_write32(dev->dev, SSB_TMSLOW, value32);
2160
2161         b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
2162                           dev->dev->bus->chipco.fast_pwrup_delay);
2163
2164         /* PHY TX errors counter. */
2165         atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2166
2167         B43legacy_WARN_ON(err != 0);
2168         b43legacydbg(dev->wl, "Chip initialized\n");
2169 out:
2170         return err;
2171
2172 err_radio_off:
2173         b43legacy_radio_turn_off(dev, 1);
2174 err_gpio_clean:
2175         b43legacy_gpio_cleanup(dev);
2176         goto out;
2177 }
2178
2179 static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
2180 {
2181         struct b43legacy_phy *phy = &dev->phy;
2182
2183         if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
2184                 return;
2185
2186         b43legacy_mac_suspend(dev);
2187         b43legacy_phy_lo_g_measure(dev);
2188         b43legacy_mac_enable(dev);
2189 }
2190
2191 static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
2192 {
2193         b43legacy_phy_lo_mark_all_unused(dev);
2194         if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
2195                 b43legacy_mac_suspend(dev);
2196                 b43legacy_calc_nrssi_slope(dev);
2197                 b43legacy_mac_enable(dev);
2198         }
2199 }
2200
2201 static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
2202 {
2203         /* Update device statistics. */
2204         b43legacy_calculate_link_quality(dev);
2205 }
2206
2207 static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
2208 {
2209         b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */
2210
2211         atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2212         wmb();
2213 }
2214
2215 static void do_periodic_work(struct b43legacy_wldev *dev)
2216 {
2217         unsigned int state;
2218
2219         state = dev->periodic_state;
2220         if (state % 8 == 0)
2221                 b43legacy_periodic_every120sec(dev);
2222         if (state % 4 == 0)
2223                 b43legacy_periodic_every60sec(dev);
2224         if (state % 2 == 0)
2225                 b43legacy_periodic_every30sec(dev);
2226         b43legacy_periodic_every15sec(dev);
2227 }
2228
2229 /* Periodic work locking policy:
2230  *      The whole periodic work handler is protected by
2231  *      wl->mutex. If another lock is needed somewhere in the
2232  *      pwork callchain, it's aquired in-place, where it's needed.
2233  */
2234 static void b43legacy_periodic_work_handler(struct work_struct *work)
2235 {
2236         struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
2237                                              periodic_work.work);
2238         struct b43legacy_wl *wl = dev->wl;
2239         unsigned long delay;
2240
2241         mutex_lock(&wl->mutex);
2242
2243         if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
2244                 goto out;
2245         if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
2246                 goto out_requeue;
2247
2248         do_periodic_work(dev);
2249
2250         dev->periodic_state++;
2251 out_requeue:
2252         if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
2253                 delay = msecs_to_jiffies(50);
2254         else
2255                 delay = round_jiffies_relative(HZ * 15);
2256         queue_delayed_work(wl->hw->workqueue, &dev->periodic_work, delay);
2257 out:
2258         mutex_unlock(&wl->mutex);
2259 }
2260
2261 static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
2262 {
2263         struct delayed_work *work = &dev->periodic_work;
2264
2265         dev->periodic_state = 0;
2266         INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
2267         queue_delayed_work(dev->wl->hw->workqueue, work, 0);
2268 }
2269
2270 /* Validate access to the chip (SHM) */
2271 static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
2272 {
2273         u32 value;
2274         u32 shm_backup;
2275
2276         shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
2277         b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
2278         if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2279                                  0xAA5555AA)
2280                 goto error;
2281         b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
2282         if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2283                                  0x55AAAA55)
2284                 goto error;
2285         b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);
2286
2287         value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2288         if ((value | B43legacy_MACCTL_GMODE) !=
2289             (B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
2290                 goto error;
2291
2292         value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
2293         if (value)
2294                 goto error;
2295
2296         return 0;
2297 error:
2298         b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
2299         return -ENODEV;
2300 }
2301
2302 static void b43legacy_security_init(struct b43legacy_wldev *dev)
2303 {
2304         dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
2305         B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
2306         dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2307                                         0x0056);
2308         /* KTP is a word address, but we address SHM bytewise.
2309          * So multiply by two.
2310          */
2311         dev->ktp *= 2;
2312         if (dev->dev->id.revision >= 5)
2313                 /* Number of RCMTA address slots */
2314                 b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
2315                                   dev->max_nr_keys - 8);
2316 }
2317
2318 static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
2319 {
2320         struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
2321         unsigned long flags;
2322
2323         /* Don't take wl->mutex here, as it could deadlock with
2324          * hwrng internal locking. It's not needed to take
2325          * wl->mutex here, anyway. */
2326
2327         spin_lock_irqsave(&wl->irq_lock, flags);
2328         *data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
2329         spin_unlock_irqrestore(&wl->irq_lock, flags);
2330
2331         return (sizeof(u16));
2332 }
2333
2334 static void b43legacy_rng_exit(struct b43legacy_wl *wl)
2335 {
2336         if (wl->rng_initialized)
2337                 hwrng_unregister(&wl->rng);
2338 }
2339
2340 static int b43legacy_rng_init(struct b43legacy_wl *wl)
2341 {
2342         int err;
2343
2344         snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
2345                  "%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
2346         wl->rng.name = wl->rng_name;
2347         wl->rng.data_read = b43legacy_rng_read;
2348         wl->rng.priv = (unsigned long)wl;
2349         wl->rng_initialized = 1;
2350         err = hwrng_register(&wl->rng);
2351         if (err) {
2352                 wl->rng_initialized = 0;
2353                 b43legacyerr(wl, "Failed to register the random "
2354                        "number generator (%d)\n", err);
2355         }
2356
2357         return err;
2358 }
2359
2360 static int b43legacy_op_tx(struct ieee80211_hw *hw,
2361                            struct sk_buff *skb,
2362                            struct ieee80211_tx_control *ctl)
2363 {
2364         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2365         struct b43legacy_wldev *dev = wl->current_dev;
2366         int err = -ENODEV;
2367         unsigned long flags;
2368
2369         if (unlikely(!dev))
2370                 goto out;
2371         if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
2372                 goto out;
2373         /* DMA-TX is done without a global lock. */
2374         if (b43legacy_using_pio(dev)) {
2375                 spin_lock_irqsave(&wl->irq_lock, flags);
2376                 err = b43legacy_pio_tx(dev, skb, ctl);
2377                 spin_unlock_irqrestore(&wl->irq_lock, flags);
2378         } else
2379                 err = b43legacy_dma_tx(dev, skb, ctl);
2380 out:
2381         if (unlikely(err)) {
2382                 /* Drop the packet. */
2383                 dev_kfree_skb_any(skb);
2384         }
2385         return NETDEV_TX_OK;
2386 }
2387
2388 static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
2389                                 int queue,
2390                                 const struct ieee80211_tx_queue_params *params)
2391 {
2392         return 0;
2393 }
2394
2395 static int b43legacy_op_get_tx_stats(struct ieee80211_hw *hw,
2396                                      struct ieee80211_tx_queue_stats *stats)
2397 {
2398         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2399         struct b43legacy_wldev *dev = wl->current_dev;
2400         unsigned long flags;
2401         int err = -ENODEV;
2402
2403         if (!dev)
2404                 goto out;
2405         spin_lock_irqsave(&wl->irq_lock, flags);
2406         if (likely(b43legacy_status(dev) >= B43legacy_STAT_STARTED)) {
2407                 if (b43legacy_using_pio(dev))
2408                         b43legacy_pio_get_tx_stats(dev, stats);
2409                 else
2410                         b43legacy_dma_get_tx_stats(dev, stats);
2411                 err = 0;
2412         }
2413         spin_unlock_irqrestore(&wl->irq_lock, flags);
2414 out:
2415         return err;
2416 }
2417
2418 static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
2419                                   struct ieee80211_low_level_stats *stats)
2420 {
2421         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2422         unsigned long flags;
2423
2424         spin_lock_irqsave(&wl->irq_lock, flags);
2425         memcpy(stats, &wl->ieee_stats, sizeof(*stats));
2426         spin_unlock_irqrestore(&wl->irq_lock, flags);
2427
2428         return 0;
2429 }
2430
2431 static const char *phymode_to_string(unsigned int phymode)
2432 {
2433         switch (phymode) {
2434         case B43legacy_PHYMODE_B:
2435                 return "B";
2436         case B43legacy_PHYMODE_G:
2437                 return "G";
2438         default:
2439                 B43legacy_BUG_ON(1);
2440         }
2441         return "";
2442 }
2443
2444 static int find_wldev_for_phymode(struct b43legacy_wl *wl,
2445                                   unsigned int phymode,
2446                                   struct b43legacy_wldev **dev,
2447                                   bool *gmode)
2448 {
2449         struct b43legacy_wldev *d;
2450
2451         list_for_each_entry(d, &wl->devlist, list) {
2452                 if (d->phy.possible_phymodes & phymode) {
2453                         /* Ok, this device supports the PHY-mode.
2454                          * Set the gmode bit. */
2455                         *gmode = 1;
2456                         *dev = d;
2457
2458                         return 0;
2459                 }
2460         }
2461
2462         return -ESRCH;
2463 }
2464
2465 static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
2466 {
2467         struct ssb_device *sdev = dev->dev;
2468         u32 tmslow;
2469
2470         tmslow = ssb_read32(sdev, SSB_TMSLOW);
2471         tmslow &= ~B43legacy_TMSLOW_GMODE;
2472         tmslow |= B43legacy_TMSLOW_PHYRESET;
2473         tmslow |= SSB_TMSLOW_FGC;
2474         ssb_write32(sdev, SSB_TMSLOW, tmslow);
2475         msleep(1);
2476
2477         tmslow = ssb_read32(sdev, SSB_TMSLOW);
2478         tmslow &= ~SSB_TMSLOW_FGC;
2479         tmslow |= B43legacy_TMSLOW_PHYRESET;
2480         ssb_write32(sdev, SSB_TMSLOW, tmslow);
2481         msleep(1);
2482 }
2483
2484 /* Expects wl->mutex locked */
2485 static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
2486                                       unsigned int new_mode)
2487 {
2488         struct b43legacy_wldev *up_dev;
2489         struct b43legacy_wldev *down_dev;
2490         int err;
2491         bool gmode = 0;
2492         int prev_status;
2493
2494         err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
2495         if (err) {
2496                 b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
2497                        phymode_to_string(new_mode));
2498                 return err;
2499         }
2500         if ((up_dev == wl->current_dev) &&
2501             (!!wl->current_dev->phy.gmode == !!gmode))
2502                 /* This device is already running. */
2503                 return 0;
2504         b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
2505                phymode_to_string(new_mode));
2506         down_dev = wl->current_dev;
2507
2508         prev_status = b43legacy_status(down_dev);
2509         /* Shutdown the currently running core. */
2510         if (prev_status >= B43legacy_STAT_STARTED)
2511                 b43legacy_wireless_core_stop(down_dev);
2512         if (prev_status >= B43legacy_STAT_INITIALIZED)
2513                 b43legacy_wireless_core_exit(down_dev);
2514
2515         if (down_dev != up_dev)
2516                 /* We switch to a different core, so we put PHY into
2517                  * RESET on the old core. */
2518                 b43legacy_put_phy_into_reset(down_dev);
2519
2520         /* Now start the new core. */
2521         up_dev->phy.gmode = gmode;
2522         if (prev_status >= B43legacy_STAT_INITIALIZED) {
2523                 err = b43legacy_wireless_core_init(up_dev);
2524                 if (err) {
2525                         b43legacyerr(wl, "Fatal: Could not initialize device"
2526                                      " for newly selected %s-PHY mode\n",
2527                                      phymode_to_string(new_mode));
2528                         goto init_failure;
2529                 }
2530         }
2531         if (prev_status >= B43legacy_STAT_STARTED) {
2532                 err = b43legacy_wireless_core_start(up_dev);
2533                 if (err) {
2534                         b43legacyerr(wl, "Fatal: Coult not start device for "
2535                                "newly selected %s-PHY mode\n",
2536                                phymode_to_string(new_mode));
2537                         b43legacy_wireless_core_exit(up_dev);
2538                         goto init_failure;
2539                 }
2540         }
2541         B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
2542
2543         b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
2544
2545         wl->current_dev = up_dev;
2546
2547         return 0;
2548 init_failure:
2549         /* Whoops, failed to init the new core. No core is operating now. */
2550         wl->current_dev = NULL;
2551         return err;
2552 }
2553
2554 static int b43legacy_antenna_from_ieee80211(u8 antenna)
2555 {
2556         switch (antenna) {
2557         case 0: /* default/diversity */
2558                 return B43legacy_ANTENNA_DEFAULT;
2559         case 1: /* Antenna 0 */
2560                 return B43legacy_ANTENNA0;
2561         case 2: /* Antenna 1 */
2562                 return B43legacy_ANTENNA1;
2563         default:
2564                 return B43legacy_ANTENNA_DEFAULT;
2565         }
2566 }
2567
2568 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
2569                                    struct ieee80211_conf *conf)
2570 {
2571         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2572         struct b43legacy_wldev *dev;
2573         struct b43legacy_phy *phy;
2574         unsigned long flags;
2575         unsigned int new_phymode = 0xFFFF;
2576         int antenna_tx;
2577         int antenna_rx;
2578         int err = 0;
2579         u32 savedirqs;
2580
2581         antenna_tx = b43legacy_antenna_from_ieee80211(conf->antenna_sel_tx);
2582         antenna_rx = b43legacy_antenna_from_ieee80211(conf->antenna_sel_rx);
2583
2584         mutex_lock(&wl->mutex);
2585         dev = wl->current_dev;
2586         phy = &dev->phy;
2587
2588         /* Switch the PHY mode (if necessary). */
2589         switch (conf->channel->band) {
2590         case IEEE80211_BAND_2GHZ:
2591                 if (phy->type == B43legacy_PHYTYPE_B)
2592                         new_phymode = B43legacy_PHYMODE_B;
2593                 else
2594                         new_phymode = B43legacy_PHYMODE_G;
2595                 break;
2596         default:
2597                 B43legacy_WARN_ON(1);
2598         }
2599         err = b43legacy_switch_phymode(wl, new_phymode);
2600         if (err)
2601                 goto out_unlock_mutex;
2602
2603         /* Disable IRQs while reconfiguring the device.
2604          * This makes it possible to drop the spinlock throughout
2605          * the reconfiguration process. */
2606         spin_lock_irqsave(&wl->irq_lock, flags);
2607         if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2608                 spin_unlock_irqrestore(&wl->irq_lock, flags);
2609                 goto out_unlock_mutex;
2610         }
2611         savedirqs = b43legacy_interrupt_disable(dev, B43legacy_IRQ_ALL);
2612         spin_unlock_irqrestore(&wl->irq_lock, flags);
2613         b43legacy_synchronize_irq(dev);
2614
2615         /* Switch to the requested channel.
2616          * The firmware takes care of races with the TX handler. */
2617         if (conf->channel->hw_value != phy->channel)
2618                 b43legacy_radio_selectchannel(dev, conf->channel->hw_value, 0);
2619
2620         /* Enable/Disable ShortSlot timing. */
2621         if ((!!(conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME))
2622              != dev->short_slot) {
2623                 B43legacy_WARN_ON(phy->type != B43legacy_PHYTYPE_G);
2624                 if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME)
2625                         b43legacy_short_slot_timing_enable(dev);
2626                 else
2627                         b43legacy_short_slot_timing_disable(dev);
2628         }
2629
2630         dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
2631
2632         /* Adjust the desired TX power level. */
2633         if (conf->power_level != 0) {
2634                 if (conf->power_level != phy->power_level) {
2635                         phy->power_level = conf->power_level;
2636                         b43legacy_phy_xmitpower(dev);
2637                 }
2638         }
2639
2640         /* Antennas for RX and management frame TX. */
2641         b43legacy_mgmtframe_txantenna(dev, antenna_tx);
2642
2643         /* Update templates for AP mode. */
2644         if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP))
2645                 b43legacy_set_beacon_int(dev, conf->beacon_int);
2646
2647
2648         if (!!conf->radio_enabled != phy->radio_on) {
2649                 if (conf->radio_enabled) {
2650                         b43legacy_radio_turn_on(dev);
2651                         b43legacyinfo(dev->wl, "Radio turned on by software\n");
2652                         if (!dev->radio_hw_enable)
2653                                 b43legacyinfo(dev->wl, "The hardware RF-kill"
2654                                               " button still turns the radio"
2655                                               " physically off. Press the"
2656                                               " button to turn it on.\n");
2657                 } else {
2658                         b43legacy_radio_turn_off(dev, 0);
2659                         b43legacyinfo(dev->wl, "Radio turned off by"
2660                                       " software\n");
2661                 }
2662         }
2663
2664         spin_lock_irqsave(&wl->irq_lock, flags);
2665         b43legacy_interrupt_enable(dev, savedirqs);
2666         mmiowb();
2667         spin_unlock_irqrestore(&wl->irq_lock, flags);
2668 out_unlock_mutex:
2669         mutex_unlock(&wl->mutex);
2670
2671         return err;
2672 }
2673
2674 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
2675                                           unsigned int changed,
2676                                           unsigned int *fflags,
2677                                           int mc_count,
2678                                           struct dev_addr_list *mc_list)
2679 {
2680         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2681         struct b43legacy_wldev *dev = wl->current_dev;
2682         unsigned long flags;
2683
2684         if (!dev) {
2685                 *fflags = 0;
2686                 return;
2687         }
2688
2689         spin_lock_irqsave(&wl->irq_lock, flags);
2690         *fflags &= FIF_PROMISC_IN_BSS |
2691                   FIF_ALLMULTI |
2692                   FIF_FCSFAIL |
2693                   FIF_PLCPFAIL |
2694                   FIF_CONTROL |
2695                   FIF_OTHER_BSS |
2696                   FIF_BCN_PRBRESP_PROMISC;
2697
2698         changed &= FIF_PROMISC_IN_BSS |
2699                    FIF_ALLMULTI |
2700                    FIF_FCSFAIL |
2701                    FIF_PLCPFAIL |
2702                    FIF_CONTROL |
2703                    FIF_OTHER_BSS |
2704                    FIF_BCN_PRBRESP_PROMISC;
2705
2706         wl->filter_flags = *fflags;
2707
2708         if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
2709                 b43legacy_adjust_opmode(dev);
2710         spin_unlock_irqrestore(&wl->irq_lock, flags);
2711 }
2712
2713 static int b43legacy_op_config_interface(struct ieee80211_hw *hw,
2714                                          struct ieee80211_vif *vif,
2715                                          struct ieee80211_if_conf *conf)
2716 {
2717         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2718         struct b43legacy_wldev *dev = wl->current_dev;
2719         unsigned long flags;
2720
2721         if (!dev)
2722                 return -ENODEV;
2723         mutex_lock(&wl->mutex);
2724         spin_lock_irqsave(&wl->irq_lock, flags);
2725         B43legacy_WARN_ON(wl->vif != vif);
2726         if (conf->bssid)
2727                 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
2728         else
2729                 memset(wl->bssid, 0, ETH_ALEN);
2730         if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
2731                 if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP)) {
2732                         B43legacy_WARN_ON(conf->type != IEEE80211_IF_TYPE_AP);
2733                         b43legacy_set_ssid(dev, conf->ssid, conf->ssid_len);
2734                         if (conf->beacon)
2735                                 b43legacy_update_templates(wl, conf->beacon);
2736                 }
2737                 b43legacy_write_mac_bssid_templates(dev);
2738         }
2739         spin_unlock_irqrestore(&wl->irq_lock, flags);
2740         mutex_unlock(&wl->mutex);
2741
2742         return 0;
2743 }
2744
2745 /* Locking: wl->mutex */
2746 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
2747 {
2748         struct b43legacy_wl *wl = dev->wl;
2749         unsigned long flags;
2750
2751         if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
2752                 return;
2753
2754         /* Disable and sync interrupts. We must do this before than
2755          * setting the status to INITIALIZED, as the interrupt handler
2756          * won't care about IRQs then. */
2757         spin_lock_irqsave(&wl->irq_lock, flags);
2758         dev->irq_savedstate = b43legacy_interrupt_disable(dev,
2759                                                           B43legacy_IRQ_ALL);
2760         b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
2761         spin_unlock_irqrestore(&wl->irq_lock, flags);
2762         b43legacy_synchronize_irq(dev);
2763
2764         b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
2765
2766         mutex_unlock(&wl->mutex);
2767         /* Must unlock as it would otherwise deadlock. No races here.
2768          * Cancel the possibly running self-rearming periodic work. */
2769         cancel_delayed_work_sync(&dev->periodic_work);
2770         mutex_lock(&wl->mutex);
2771
2772         ieee80211_stop_queues(wl->hw); /* FIXME this could cause a deadlock */
2773
2774         b43legacy_mac_suspend(dev);
2775         free_irq(dev->dev->irq, dev);
2776         b43legacydbg(wl, "Wireless interface stopped\n");
2777 }
2778
2779 /* Locking: wl->mutex */
2780 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
2781 {
2782         int err;
2783
2784         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
2785
2786         drain_txstatus_queue(dev);
2787         err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
2788                           IRQF_SHARED, KBUILD_MODNAME, dev);
2789         if (err) {
2790                 b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
2791                        dev->dev->irq);
2792                 goto out;
2793         }
2794         /* We are ready to run. */
2795         b43legacy_set_status(dev, B43legacy_STAT_STARTED);
2796
2797         /* Start data flow (TX/RX) */
2798         b43legacy_mac_enable(dev);
2799         b43legacy_interrupt_enable(dev, dev->irq_savedstate);
2800         ieee80211_start_queues(dev->wl->hw);
2801
2802         /* Start maintenance work */
2803         b43legacy_periodic_tasks_setup(dev);
2804
2805         b43legacydbg(dev->wl, "Wireless interface started\n");
2806 out:
2807         return err;
2808 }
2809
2810 /* Get PHY and RADIO versioning numbers */
2811 static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
2812 {
2813         struct b43legacy_phy *phy = &dev->phy;
2814         u32 tmp;
2815         u8 analog_type;
2816         u8 phy_type;
2817         u8 phy_rev;
2818         u16 radio_manuf;
2819         u16 radio_ver;
2820         u16 radio_rev;
2821         int unsupported = 0;
2822
2823         /* Get PHY versioning */
2824         tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
2825         analog_type = (tmp & B43legacy_PHYVER_ANALOG)
2826                       >> B43legacy_PHYVER_ANALOG_SHIFT;
2827         phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
2828         phy_rev = (tmp & B43legacy_PHYVER_VERSION);
2829         switch (phy_type) {
2830         case B43legacy_PHYTYPE_B:
2831                 if (phy_rev != 2 && phy_rev != 4
2832                     && phy_rev != 6 && phy_rev != 7)
2833                         unsupported = 1;
2834                 break;
2835         case B43legacy_PHYTYPE_G:
2836                 if (phy_rev > 8)
2837                         unsupported = 1;
2838                 break;
2839         default:
2840                 unsupported = 1;
2841         };
2842         if (unsupported) {
2843                 b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
2844                        "(Analog %u, Type %u, Revision %u)\n",
2845                        analog_type, phy_type, phy_rev);
2846                 return -EOPNOTSUPP;
2847         }
2848         b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
2849                analog_type, phy_type, phy_rev);
2850
2851
2852         /* Get RADIO versioning */
2853         if (dev->dev->bus->chip_id == 0x4317) {
2854                 if (dev->dev->bus->chip_rev == 0)
2855                         tmp = 0x3205017F;
2856                 else if (dev->dev->bus->chip_rev == 1)
2857                         tmp = 0x4205017F;
2858                 else
2859                         tmp = 0x5205017F;
2860         } else {
2861                 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
2862                                   B43legacy_RADIOCTL_ID);
2863                 tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
2864                 tmp <<= 16;
2865                 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
2866                                   B43legacy_RADIOCTL_ID);
2867                 tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
2868         }
2869         radio_manuf = (tmp & 0x00000FFF);
2870         radio_ver = (tmp & 0x0FFFF000) >> 12;
2871         radio_rev = (tmp & 0xF0000000) >> 28;
2872         switch (phy_type) {
2873         case B43legacy_PHYTYPE_B:
2874                 if ((radio_ver & 0xFFF0) != 0x2050)
2875                         unsupported = 1;
2876                 break;
2877         case B43legacy_PHYTYPE_G:
2878                 if (radio_ver != 0x2050)
2879                         unsupported = 1;
2880                 break;
2881         default:
2882                 B43legacy_BUG_ON(1);
2883         }
2884         if (unsupported) {
2885                 b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
2886                        "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
2887                        radio_manuf, radio_ver, radio_rev);
2888                 return -EOPNOTSUPP;
2889         }
2890         b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
2891                      " Revision %u\n", radio_manuf, radio_ver, radio_rev);
2892
2893
2894         phy->radio_manuf = radio_manuf;
2895         phy->radio_ver = radio_ver;
2896         phy->radio_rev = radio_rev;
2897
2898         phy->analog = analog_type;
2899         phy->type = phy_type;
2900         phy->rev = phy_rev;
2901
2902         return 0;
2903 }
2904
2905 static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
2906                                       struct b43legacy_phy *phy)
2907 {
2908         struct b43legacy_lopair *lo;
2909         int i;
2910
2911         memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
2912         memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
2913
2914         /* Assume the radio is enabled. If it's not enabled, the state will
2915          * immediately get fixed on the first periodic work run. */
2916         dev->radio_hw_enable = 1;
2917
2918         phy->savedpctlreg = 0xFFFF;
2919         phy->aci_enable = 0;
2920         phy->aci_wlan_automatic = 0;
2921         phy->aci_hw_rssi = 0;
2922
2923         lo = phy->_lo_pairs;
2924         if (lo)
2925                 memset(lo, 0, sizeof(struct b43legacy_lopair) *
2926                                      B43legacy_LO_COUNT);
2927         phy->max_lb_gain = 0;
2928         phy->trsw_rx_gain = 0;
2929
2930         /* Set default attenuation values. */
2931         phy->bbatt = b43legacy_default_baseband_attenuation(dev);
2932         phy->rfatt = b43legacy_default_radio_attenuation(dev);
2933         phy->txctl1 = b43legacy_default_txctl1(dev);
2934         phy->txpwr_offset = 0;
2935
2936         /* NRSSI */
2937         phy->nrssislope = 0;
2938         for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
2939                 phy->nrssi[i] = -1000;
2940         for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
2941                 phy->nrssi_lt[i] = i;
2942
2943         phy->lofcal = 0xFFFF;
2944         phy->initval = 0xFFFF;
2945
2946         phy->interfmode = B43legacy_INTERFMODE_NONE;
2947         phy->channel = 0xFF;
2948 }
2949
2950 static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
2951 {
2952         /* Flags */
2953         dev->dfq_valid = 0;
2954
2955         /* Stats */
2956         memset(&dev->stats, 0, sizeof(dev->stats));
2957
2958         setup_struct_phy_for_init(dev, &dev->phy);
2959
2960         /* IRQ related flags */
2961         dev->irq_reason = 0;
2962         memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
2963         dev->irq_savedstate = B43legacy_IRQ_MASKTEMPLATE;
2964
2965         dev->mac_suspended = 1;
2966
2967         /* Noise calculation context */
2968         memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
2969 }
2970
2971 static void b43legacy_imcfglo_timeouts_workaround(struct b43legacy_wldev *dev)
2972 {
2973 #ifdef CONFIG_SSB_DRIVER_PCICORE
2974         struct ssb_bus *bus = dev->dev->bus;
2975         u32 tmp;
2976
2977         if (bus->pcicore.dev &&
2978             bus->pcicore.dev->id.coreid == SSB_DEV_PCI &&
2979             bus->pcicore.dev->id.revision <= 5) {
2980                 /* IMCFGLO timeouts workaround. */
2981                 tmp = ssb_read32(dev->dev, SSB_IMCFGLO);
2982                 tmp &= ~SSB_IMCFGLO_REQTO;
2983                 tmp &= ~SSB_IMCFGLO_SERTO;
2984                 switch (bus->bustype) {
2985                 case SSB_BUSTYPE_PCI:
2986                 case SSB_BUSTYPE_PCMCIA:
2987                         tmp |= 0x32;
2988                         break;
2989                 case SSB_BUSTYPE_SSB:
2990                         tmp |= 0x53;
2991                         break;
2992                 }
2993                 ssb_write32(dev->dev, SSB_IMCFGLO, tmp);
2994         }
2995 #endif /* CONFIG_SSB_DRIVER_PCICORE */
2996 }
2997
2998 /* Write the short and long frame retry limit values. */
2999 static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
3000                                        unsigned int short_retry,
3001                                        unsigned int long_retry)
3002 {
3003         /* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
3004          * the chip-internal counter. */
3005         short_retry = min(short_retry, (unsigned int)0xF);
3006         long_retry = min(long_retry, (unsigned int)0xF);
3007
3008         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
3009         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
3010 }
3011
3012 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
3013                                           bool idle) {
3014         u16 pu_delay = 1050;
3015
3016         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_IBSS) || idle)
3017                 pu_delay = 500;
3018         if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
3019                 pu_delay = max(pu_delay, (u16)2400);
3020
3021         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3022                               B43legacy_SHM_SH_SPUWKUP, pu_delay);
3023 }
3024
3025 /* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
3026 static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
3027 {
3028         u16 pretbtt;
3029
3030         /* The time value is in microseconds. */
3031         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_IBSS))
3032                 pretbtt = 2;
3033         else
3034                 pretbtt = 250;
3035         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3036                               B43legacy_SHM_SH_PRETBTT, pretbtt);
3037         b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
3038 }
3039
3040 /* Shutdown a wireless core */
3041 /* Locking: wl->mutex */
3042 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
3043 {
3044         struct b43legacy_phy *phy = &dev->phy;
3045         u32 macctl;
3046
3047         B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
3048         if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
3049                 return;
3050         b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
3051
3052         /* Stop the microcode PSM. */
3053         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
3054         macctl &= ~B43legacy_MACCTL_PSM_RUN;
3055         macctl |= B43legacy_MACCTL_PSM_JMP0;
3056         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
3057
3058         b43legacy_leds_exit(dev);
3059         b43legacy_rng_exit(dev->wl);
3060         b43legacy_pio_free(dev);
3061         b43legacy_dma_free(dev);
3062         b43legacy_chip_exit(dev);
3063         b43legacy_radio_turn_off(dev, 1);
3064         b43legacy_switch_analog(dev, 0);
3065         if (phy->dyn_tssi_tbl)
3066                 kfree(phy->tssi2dbm);
3067         kfree(phy->lo_control);
3068         phy->lo_control = NULL;
3069         if (dev->wl->current_beacon) {
3070                 dev_kfree_skb_any(dev->wl->current_beacon);
3071                 dev->wl->current_beacon = NULL;
3072         }
3073
3074         ssb_device_disable(dev->dev, 0);
3075         ssb_bus_may_powerdown(dev->dev->bus);
3076 }
3077
3078 static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
3079 {
3080         struct b43legacy_phy *phy = &dev->phy;
3081         int i;
3082
3083         /* Set default attenuation values. */
3084         phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3085         phy->rfatt = b43legacy_default_radio_attenuation(dev);
3086         phy->txctl1 = b43legacy_default_txctl1(dev);
3087         phy->txctl2 = 0xFFFF;
3088         phy->txpwr_offset = 0;
3089
3090         /* NRSSI */
3091         phy->nrssislope = 0;
3092         for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3093                 phy->nrssi[i] = -1000;
3094         for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3095                 phy->nrssi_lt[i] = i;
3096
3097         phy->lofcal = 0xFFFF;
3098         phy->initval = 0xFFFF;
3099
3100         phy->aci_enable = 0;
3101         phy->aci_wlan_automatic = 0;
3102         phy->aci_hw_rssi = 0;
3103
3104         phy->antenna_diversity = 0xFFFF;
3105         memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3106         memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3107
3108         /* Flags */
3109         phy->calibrated = 0;
3110
3111         if (phy->_lo_pairs)
3112                 memset(phy->_lo_pairs, 0,
3113                        sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
3114         memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
3115 }
3116
3117 /* Initialize a wireless core */
3118 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
3119 {
3120         struct b43legacy_wl *wl = dev->wl;
3121         struct ssb_bus *bus = dev->dev->bus;
3122         struct b43legacy_phy *phy = &dev->phy;
3123         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
3124         int err;
3125         u32 hf;
3126         u32 tmp;
3127
3128         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3129
3130         err = ssb_bus_powerup(bus, 0);
3131         if (err)
3132                 goto out;
3133         if (!ssb_device_is_enabled(dev->dev)) {
3134                 tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
3135                 b43legacy_wireless_core_reset(dev, tmp);
3136         }
3137
3138         if ((phy->type == B43legacy_PHYTYPE_B) ||
3139             (phy->type == B43legacy_PHYTYPE_G)) {
3140                 phy->_lo_pairs = kzalloc(sizeof(struct b43legacy_lopair)
3141                                          * B43legacy_LO_COUNT,
3142                                          GFP_KERNEL);
3143                 if (!phy->_lo_pairs)
3144                         return -ENOMEM;
3145         }
3146         setup_struct_wldev_for_init(dev);
3147
3148         err = b43legacy_phy_init_tssi2dbm_table(dev);
3149         if (err)
3150                 goto err_kfree_lo_control;
3151
3152         /* Enable IRQ routing to this device. */
3153         ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
3154
3155         b43legacy_imcfglo_timeouts_workaround(dev);
3156         prepare_phy_data_for_init(dev);
3157         b43legacy_phy_calibrate(dev);
3158         err = b43legacy_chip_init(dev);
3159         if (err)
3160                 goto err_kfree_tssitbl;
3161         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3162                               B43legacy_SHM_SH_WLCOREREV,
3163                               dev->dev->id.revision);
3164         hf = b43legacy_hf_read(dev);
3165         if (phy->type == B43legacy_PHYTYPE_G) {
3166                 hf |= B43legacy_HF_SYMW;
3167                 if (phy->rev == 1)
3168                         hf |= B43legacy_HF_GDCW;
3169                 if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
3170                         hf |= B43legacy_HF_OFDMPABOOST;
3171         } else if (phy->type == B43legacy_PHYTYPE_B) {
3172                 hf |= B43legacy_HF_SYMW;
3173                 if (phy->rev >= 2 && phy->radio_ver == 0x2050)
3174                         hf &= ~B43legacy_HF_GDCW;
3175         }
3176         b43legacy_hf_write(dev, hf);
3177
3178         b43legacy_set_retry_limits(dev,
3179                                    B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
3180                                    B43legacy_DEFAULT_LONG_RETRY_LIMIT);
3181
3182         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3183                               0x0044, 3);
3184         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3185                               0x0046, 2);
3186
3187         /* Disable sending probe responses from firmware.
3188          * Setting the MaxTime to one usec will always trigger
3189          * a timeout, so we never send any probe resp.
3190          * A timeout of zero is infinite. */
3191         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3192                               B43legacy_SHM_SH_PRMAXTIME, 1);
3193
3194         b43legacy_rate_memory_init(dev);
3195
3196         /* Minimum Contention Window */
3197         if (phy->type == B43legacy_PHYTYPE_B)
3198                 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3199                                       0x0003, 31);
3200         else
3201                 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3202                                       0x0003, 15);
3203         /* Maximum Contention Window */
3204         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3205                               0x0004, 1023);
3206
3207         do {
3208                 if (b43legacy_using_pio(dev))
3209                         err = b43legacy_pio_init(dev);
3210                 else {
3211                         err = b43legacy_dma_init(dev);
3212                         if (!err)
3213                                 b43legacy_qos_init(dev);
3214                 }
3215         } while (err == -EAGAIN);
3216         if (err)
3217                 goto err_chip_exit;
3218
3219         b43legacy_set_synth_pu_delay(dev, 1);
3220
3221         ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
3222         b43legacy_upload_card_macaddress(dev);
3223         b43legacy_security_init(dev);
3224         b43legacy_rng_init(wl);
3225
3226         b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
3227
3228         b43legacy_leds_init(dev);
3229 out:
3230         return err;
3231
3232 err_chip_exit:
3233         b43legacy_chip_exit(dev);
3234 err_kfree_tssitbl:
3235         if (phy->dyn_tssi_tbl)
3236                 kfree(phy->tssi2dbm);
3237 err_kfree_lo_control:
3238         kfree(phy->lo_control);
3239         phy->lo_control = NULL;
3240         ssb_bus_may_powerdown(bus);
3241         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3242         return err;
3243 }
3244
3245 static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
3246                                       struct ieee80211_if_init_conf *conf)
3247 {
3248         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3249         struct b43legacy_wldev *dev;
3250         unsigned long flags;
3251         int err = -EOPNOTSUPP;
3252
3253         /* TODO: allow WDS/AP devices to coexist */
3254
3255         if (conf->type != IEEE80211_IF_TYPE_AP &&
3256             conf->type != IEEE80211_IF_TYPE_STA &&
3257             conf->type != IEEE80211_IF_TYPE_WDS &&
3258             conf->type != IEEE80211_IF_TYPE_IBSS)
3259                 return -EOPNOTSUPP;
3260
3261         mutex_lock(&wl->mutex);
3262         if (wl->operating)
3263                 goto out_mutex_unlock;
3264
3265         b43legacydbg(wl, "Adding Interface type %d\n", conf->type);
3266
3267         dev = wl->current_dev;
3268         wl->operating = 1;
3269         wl->vif = conf->vif;
3270         wl->if_type = conf->type;
3271         memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
3272
3273         spin_lock_irqsave(&wl->irq_lock, flags);
3274         b43legacy_adjust_opmode(dev);
3275         b43legacy_set_pretbtt(dev);
3276         b43legacy_set_synth_pu_delay(dev, 0);
3277         b43legacy_upload_card_macaddress(dev);
3278         spin_unlock_irqrestore(&wl->irq_lock, flags);
3279
3280         err = 0;
3281  out_mutex_unlock:
3282         mutex_unlock(&wl->mutex);
3283
3284         return err;
3285 }
3286
3287 static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
3288                                           struct ieee80211_if_init_conf *conf)
3289 {
3290         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3291         struct b43legacy_wldev *dev = wl->current_dev;
3292         unsigned long flags;
3293
3294         b43legacydbg(wl, "Removing Interface type %d\n", conf->type);
3295
3296         mutex_lock(&wl->mutex);
3297
3298         B43legacy_WARN_ON(!wl->operating);
3299         B43legacy_WARN_ON(wl->vif != conf->vif);
3300         wl->vif = NULL;
3301
3302         wl->operating = 0;
3303
3304         spin_lock_irqsave(&wl->irq_lock, flags);
3305         b43legacy_adjust_opmode(dev);
3306         memset(wl->mac_addr, 0, ETH_ALEN);
3307         b43legacy_upload_card_macaddress(dev);
3308         spin_unlock_irqrestore(&wl->irq_lock, flags);
3309
3310         mutex_unlock(&wl->mutex);
3311 }
3312
3313 static int b43legacy_op_start(struct ieee80211_hw *hw)
3314 {
3315         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3316         struct b43legacy_wldev *dev = wl->current_dev;
3317         int did_init = 0;
3318         int err = 0;
3319         bool do_rfkill_exit = 0;
3320
3321         /* First register RFkill.
3322          * LEDs that are registered later depend on it. */
3323         b43legacy_rfkill_init(dev);
3324
3325         /* Kill all old instance specific information to make sure
3326          * the card won't use it in the short timeframe between start
3327          * and mac80211 reconfiguring it. */
3328         memset(wl->bssid, 0, ETH_ALEN);
3329         memset(wl->mac_addr, 0, ETH_ALEN);
3330         wl->filter_flags = 0;
3331
3332         mutex_lock(&wl->mutex);
3333
3334         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
3335                 err = b43legacy_wireless_core_init(dev);
3336                 if (err) {
3337                         do_rfkill_exit = 1;
3338                         goto out_mutex_unlock;
3339                 }
3340                 did_init = 1;
3341         }
3342
3343         if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
3344                 err = b43legacy_wireless_core_start(dev);
3345                 if (err) {
3346                         if (did_init)
3347                                 b43legacy_wireless_core_exit(dev);
3348                         do_rfkill_exit = 1;
3349                         goto out_mutex_unlock;
3350                 }
3351         }
3352
3353 out_mutex_unlock:
3354         mutex_unlock(&wl->mutex);
3355
3356         if (do_rfkill_exit)
3357                 b43legacy_rfkill_exit(dev);
3358
3359         return err;
3360 }
3361
3362 static void b43legacy_op_stop(struct ieee80211_hw *hw)
3363 {
3364         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3365         struct b43legacy_wldev *dev = wl->current_dev;
3366
3367         b43legacy_rfkill_exit(dev);
3368
3369         mutex_lock(&wl->mutex);
3370         if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
3371                 b43legacy_wireless_core_stop(dev);
3372         b43legacy_wireless_core_exit(dev);
3373         mutex_unlock(&wl->mutex);
3374 }
3375
3376 static int b43legacy_op_set_retry_limit(struct ieee80211_hw *hw,
3377                                         u32 short_retry_limit,
3378                                         u32 long_retry_limit)
3379 {
3380         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3381         struct b43legacy_wldev *dev;
3382         int err = 0;
3383
3384         mutex_lock(&wl->mutex);
3385         dev = wl->current_dev;
3386         if (unlikely(!dev ||
3387                      (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED))) {
3388                 err = -ENODEV;
3389                 goto out_unlock;
3390         }
3391         b43legacy_set_retry_limits(dev, short_retry_limit, long_retry_limit);
3392 out_unlock:
3393         mutex_unlock(&wl->mutex);
3394
3395         return err;
3396 }
3397
3398 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
3399                                        int aid, int set)
3400 {
3401         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3402         struct sk_buff *beacon;
3403         unsigned long flags;
3404
3405         /* We could modify the existing beacon and set the aid bit in the TIM
3406          * field, but that would probably require resizing and moving of data
3407          * within the beacon template. Simply request a new beacon and let
3408          * mac80211 do the hard work. */
3409         beacon = ieee80211_beacon_get(hw, wl->vif, NULL);
3410         if (unlikely(!beacon))
3411                 return -ENOMEM;
3412         spin_lock_irqsave(&wl->irq_lock, flags);
3413         b43legacy_update_templates(wl, beacon);
3414         spin_unlock_irqrestore(&wl->irq_lock, flags);
3415
3416         return 0;
3417 }
3418
3419 static int b43legacy_op_ibss_beacon_update(struct ieee80211_hw *hw,
3420                                            struct sk_buff *beacon,
3421                                            struct ieee80211_tx_control *ctl)
3422 {
3423         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3424         unsigned long flags;
3425
3426         spin_lock_irqsave(&wl->irq_lock, flags);
3427         b43legacy_update_templates(wl, beacon);
3428         spin_unlock_irqrestore(&wl->irq_lock, flags);
3429
3430         return 0;
3431 }
3432
3433 static const struct ieee80211_ops b43legacy_hw_ops = {
3434         .tx                     = b43legacy_op_tx,
3435         .conf_tx                = b43legacy_op_conf_tx,
3436         .add_interface          = b43legacy_op_add_interface,
3437         .remove_interface       = b43legacy_op_remove_interface,
3438         .config                 = b43legacy_op_dev_config,
3439         .config_interface       = b43legacy_op_config_interface,
3440         .configure_filter       = b43legacy_op_configure_filter,
3441         .get_stats              = b43legacy_op_get_stats,
3442         .get_tx_stats           = b43legacy_op_get_tx_stats,
3443         .start                  = b43legacy_op_start,
3444         .stop                   = b43legacy_op_stop,
3445         .set_retry_limit        = b43legacy_op_set_retry_limit,
3446         .set_tim                = b43legacy_op_beacon_set_tim,
3447         .beacon_update          = b43legacy_op_ibss_beacon_update,
3448 };
3449
3450 /* Hard-reset the chip. Do not call this directly.
3451  * Use b43legacy_controller_restart()
3452  */
3453 static void b43legacy_chip_reset(struct work_struct *work)
3454 {
3455         struct b43legacy_wldev *dev =
3456                 container_of(work, struct b43legacy_wldev, restart_work);
3457         struct b43legacy_wl *wl = dev->wl;
3458         int err = 0;
3459         int prev_status;
3460
3461         mutex_lock(&wl->mutex);
3462
3463         prev_status = b43legacy_status(dev);
3464         /* Bring the device down... */
3465         if (prev_status >= B43legacy_STAT_STARTED)
3466                 b43legacy_wireless_core_stop(dev);
3467         if (prev_status >= B43legacy_STAT_INITIALIZED)
3468                 b43legacy_wireless_core_exit(dev);
3469
3470         /* ...and up again. */
3471         if (prev_status >= B43legacy_STAT_INITIALIZED) {
3472                 err = b43legacy_wireless_core_init(dev);
3473                 if (err)
3474                         goto out;
3475         }
3476         if (prev_status >= B43legacy_STAT_STARTED) {
3477                 err = b43legacy_wireless_core_start(dev);
3478                 if (err) {
3479                         b43legacy_wireless_core_exit(dev);
3480                         goto out;
3481                 }
3482         }
3483 out:
3484         if (err)
3485                 wl->current_dev = NULL; /* Failed to init the dev. */
3486         mutex_unlock(&wl->mutex);
3487         if (err)
3488                 b43legacyerr(wl, "Controller restart FAILED\n");
3489         else
3490                 b43legacyinfo(wl, "Controller restarted\n");
3491 }
3492
3493 static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
3494                                  int have_bphy,
3495                                  int have_gphy)
3496 {
3497         struct ieee80211_hw *hw = dev->wl->hw;
3498         struct b43legacy_phy *phy = &dev->phy;
3499
3500         phy->possible_phymodes = 0;
3501         if (have_bphy) {
3502                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3503                         &b43legacy_band_2GHz_BPHY;
3504                 phy->possible_phymodes |= B43legacy_PHYMODE_B;
3505         }
3506
3507         if (have_gphy) {
3508                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3509                         &b43legacy_band_2GHz_GPHY;
3510                 phy->possible_phymodes |= B43legacy_PHYMODE_G;
3511         }
3512
3513         return 0;
3514 }
3515
3516 static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
3517 {
3518         /* We release firmware that late to not be required to re-request
3519          * is all the time when we reinit the core. */
3520         b43legacy_release_firmware(dev);
3521 }
3522
3523 static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
3524 {
3525         struct b43legacy_wl *wl = dev->wl;
3526         struct ssb_bus *bus = dev->dev->bus;
3527         struct pci_dev *pdev = bus->host_pci;
3528         int err;
3529         int have_bphy = 0;
3530         int have_gphy = 0;
3531         u32 tmp;
3532
3533         /* Do NOT do any device initialization here.
3534          * Do it in wireless_core_init() instead.
3535          * This function is for gathering basic information about the HW, only.
3536          * Also some structs may be set up here. But most likely you want to
3537          * have that in core_init(), too.
3538          */
3539
3540         err = ssb_bus_powerup(bus, 0);
3541         if (err) {
3542                 b43legacyerr(wl, "Bus powerup failed\n");
3543                 goto out;
3544         }
3545         /* Get the PHY type. */
3546         if (dev->dev->id.revision >= 5) {
3547                 u32 tmshigh;
3548
3549                 tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
3550                 have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
3551                 if (!have_gphy)
3552                         have_bphy = 1;
3553         } else if (dev->dev->id.revision == 4)
3554                 have_gphy = 1;
3555         else
3556                 have_bphy = 1;
3557
3558         dev->phy.gmode = (have_gphy || have_bphy);
3559         tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3560         b43legacy_wireless_core_reset(dev, tmp);
3561
3562         err = b43legacy_phy_versioning(dev);
3563         if (err)
3564                 goto err_powerdown;
3565         /* Check if this device supports multiband. */
3566         if (!pdev ||
3567             (pdev->device != 0x4312 &&
3568              pdev->device != 0x4319 &&
3569              pdev->device != 0x4324)) {
3570                 /* No multiband support. */
3571                 have_bphy = 0;
3572                 have_gphy = 0;
3573                 switch (dev->phy.type) {
3574                 case B43legacy_PHYTYPE_B:
3575                         have_bphy = 1;
3576                         break;
3577                 case B43legacy_PHYTYPE_G:
3578                         have_gphy = 1;
3579                         break;
3580                 default:
3581                         B43legacy_BUG_ON(1);
3582                 }
3583         }
3584         dev->phy.gmode = (have_gphy || have_bphy);
3585         tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3586         b43legacy_wireless_core_reset(dev, tmp);
3587
3588         err = b43legacy_validate_chipaccess(dev);
3589         if (err)
3590                 goto err_powerdown;
3591         err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
3592         if (err)
3593                 goto err_powerdown;
3594
3595         /* Now set some default "current_dev" */
3596         if (!wl->current_dev)
3597                 wl->current_dev = dev;
3598         INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
3599
3600         b43legacy_radio_turn_off(dev, 1);
3601         b43legacy_switch_analog(dev, 0);
3602         ssb_device_disable(dev->dev, 0);
3603         ssb_bus_may_powerdown(bus);
3604
3605 out:
3606         return err;
3607
3608 err_powerdown:
3609         ssb_bus_may_powerdown(bus);
3610         return err;
3611 }
3612
3613 static void b43legacy_one_core_detach(struct ssb_device *dev)
3614 {
3615         struct b43legacy_wldev *wldev;
3616         struct b43legacy_wl *wl;
3617
3618         /* Do not cancel ieee80211-workqueue based work here.
3619          * See comment in b43legacy_remove(). */
3620
3621         wldev = ssb_get_drvdata(dev);
3622         wl = wldev->wl;
3623         b43legacy_debugfs_remove_device(wldev);
3624         b43legacy_wireless_core_detach(wldev);
3625         list_del(&wldev->list);
3626         wl->nr_devs--;
3627         ssb_set_drvdata(dev, NULL);
3628         kfree(wldev);
3629 }
3630
3631 static int b43legacy_one_core_attach(struct ssb_device *dev,
3632                                      struct b43legacy_wl *wl)
3633 {
3634         struct b43legacy_wldev *wldev;
3635         struct pci_dev *pdev;
3636         int err = -ENOMEM;
3637
3638         if (!list_empty(&wl->devlist)) {
3639                 /* We are not the first core on this chip. */
3640                 pdev = dev->bus->host_pci;
3641                 /* Only special chips support more than one wireless
3642                  * core, although some of the other chips have more than
3643                  * one wireless core as well. Check for this and
3644                  * bail out early.
3645                  */
3646                 if (!pdev ||
3647                     ((pdev->device != 0x4321) &&
3648                      (pdev->device != 0x4313) &&
3649                      (pdev->device != 0x431A))) {
3650                         b43legacydbg(wl, "Ignoring unconnected 802.11 core\n");
3651                         return -ENODEV;
3652                 }
3653         }
3654
3655         wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
3656         if (!wldev)
3657                 goto out;
3658
3659         wldev->dev = dev;
3660         wldev->wl = wl;
3661         b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
3662         wldev->bad_frames_preempt = modparam_bad_frames_preempt;
3663         tasklet_init(&wldev->isr_tasklet,
3664                      (void (*)(unsigned long))b43legacy_interrupt_tasklet,
3665                      (unsigned long)wldev);
3666         if (modparam_pio)
3667                 wldev->__using_pio = 1;
3668         INIT_LIST_HEAD(&wldev->list);
3669
3670         err = b43legacy_wireless_core_attach(wldev);
3671         if (err)
3672                 goto err_kfree_wldev;
3673
3674         list_add(&wldev->list, &wl->devlist);
3675         wl->nr_devs++;
3676         ssb_set_drvdata(dev, wldev);
3677         b43legacy_debugfs_add_device(wldev);
3678 out:
3679         return err;
3680
3681 err_kfree_wldev:
3682         kfree(wldev);
3683         return err;
3684 }
3685
3686 static void b43legacy_sprom_fixup(struct ssb_bus *bus)
3687 {
3688         /* boardflags workarounds */
3689         if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
3690             bus->boardinfo.type == 0x4E &&
3691             bus->boardinfo.rev > 0x40)
3692                 bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
3693 }
3694
3695 static void b43legacy_wireless_exit(struct ssb_device *dev,
3696                                   struct b43legacy_wl *wl)
3697 {
3698         struct ieee80211_hw *hw = wl->hw;
3699
3700         ssb_set_devtypedata(dev, NULL);
3701         ieee80211_free_hw(hw);
3702 }
3703
3704 static int b43legacy_wireless_init(struct ssb_device *dev)
3705 {
3706         struct ssb_sprom *sprom = &dev->bus->sprom;
3707         struct ieee80211_hw *hw;
3708         struct b43legacy_wl *wl;
3709         int err = -ENOMEM;
3710
3711         b43legacy_sprom_fixup(dev->bus);
3712
3713         hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
3714         if (!hw) {
3715                 b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
3716                 goto out;
3717         }
3718
3719         /* fill hw info */
3720         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
3721                     IEEE80211_HW_RX_INCLUDES_FCS;
3722         hw->max_signal = 100;
3723         hw->max_rssi = -110;
3724         hw->max_noise = -110;
3725         hw->queues = 1; /* FIXME: hardware has more queues */
3726         SET_IEEE80211_DEV(hw, dev->dev);
3727         if (is_valid_ether_addr(sprom->et1mac))
3728                 SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
3729         else
3730                 SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
3731
3732         /* Get and initialize struct b43legacy_wl */
3733         wl = hw_to_b43legacy_wl(hw);
3734         memset(wl, 0, sizeof(*wl));
3735         wl->hw = hw;
3736         spin_lock_init(&wl->irq_lock);
3737         spin_lock_init(&wl->leds_lock);
3738         mutex_init(&wl->mutex);
3739         INIT_LIST_HEAD(&wl->devlist);
3740
3741         ssb_set_devtypedata(dev, wl);
3742         b43legacyinfo(wl, "Broadcom %04X WLAN found\n", dev->bus->chip_id);
3743         err = 0;
3744 out:
3745         return err;
3746 }
3747
3748 static int b43legacy_probe(struct ssb_device *dev,
3749                          const struct ssb_device_id *id)
3750 {
3751         struct b43legacy_wl *wl;
3752         int err;
3753         int first = 0;
3754
3755         wl = ssb_get_devtypedata(dev);
3756         if (!wl) {
3757                 /* Probing the first core - setup common struct b43legacy_wl */
3758                 first = 1;
3759                 err = b43legacy_wireless_init(dev);
3760                 if (err)
3761                         goto out;
3762                 wl = ssb_get_devtypedata(dev);
3763                 B43legacy_WARN_ON(!wl);
3764         }
3765         err = b43legacy_one_core_attach(dev, wl);
3766         if (err)
3767                 goto err_wireless_exit;
3768
3769         if (first) {
3770                 err = ieee80211_register_hw(wl->hw);
3771                 if (err)
3772                         goto err_one_core_detach;
3773         }
3774
3775 out:
3776         return err;
3777
3778 err_one_core_detach:
3779         b43legacy_one_core_detach(dev);
3780 err_wireless_exit:
3781         if (first)
3782                 b43legacy_wireless_exit(dev, wl);
3783         return err;
3784 }
3785
3786 static void b43legacy_remove(struct ssb_device *dev)
3787 {
3788         struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
3789         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3790
3791         /* We must cancel any work here before unregistering from ieee80211,
3792          * as the ieee80211 unreg will destroy the workqueue. */
3793         cancel_work_sync(&wldev->restart_work);
3794
3795         B43legacy_WARN_ON(!wl);
3796         if (wl->current_dev == wldev)
3797                 ieee80211_unregister_hw(wl->hw);
3798
3799         b43legacy_one_core_detach(dev);
3800
3801         if (list_empty(&wl->devlist))
3802                 /* Last core on the chip unregistered.
3803                  * We can destroy common struct b43legacy_wl.
3804                  */
3805                 b43legacy_wireless_exit(dev, wl);
3806 }
3807
3808 /* Perform a hardware reset. This can be called from any context. */
3809 void b43legacy_controller_restart(struct b43legacy_wldev *dev,
3810                                   const char *reason)
3811 {
3812         /* Must avoid requeueing, if we are in shutdown. */
3813         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
3814                 return;
3815         b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
3816         queue_work(dev->wl->hw->workqueue, &dev->restart_work);
3817 }
3818
3819 #ifdef CONFIG_PM
3820
3821 static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
3822 {
3823         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3824         struct b43legacy_wl *wl = wldev->wl;
3825
3826         b43legacydbg(wl, "Suspending...\n");
3827
3828         mutex_lock(&wl->mutex);
3829         wldev->suspend_init_status = b43legacy_status(wldev);
3830         if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
3831                 b43legacy_wireless_core_stop(wldev);
3832         if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
3833                 b43legacy_wireless_core_exit(wldev);
3834         mutex_unlock(&wl->mutex);
3835
3836         b43legacydbg(wl, "Device suspended.\n");
3837
3838         return 0;
3839 }
3840
3841 static int b43legacy_resume(struct ssb_device *dev)
3842 {
3843         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3844         struct b43legacy_wl *wl = wldev->wl;
3845         int err = 0;
3846
3847         b43legacydbg(wl, "Resuming...\n");
3848
3849         mutex_lock(&wl->mutex);
3850         if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
3851                 err = b43legacy_wireless_core_init(wldev);
3852                 if (err) {
3853                         b43legacyerr(wl, "Resume failed at core init\n");
3854                         goto out;
3855                 }
3856         }
3857         if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
3858                 err = b43legacy_wireless_core_start(wldev);
3859                 if (err) {
3860                         b43legacy_wireless_core_exit(wldev);
3861                         b43legacyerr(wl, "Resume failed at core start\n");
3862                         goto out;
3863                 }
3864         }
3865         mutex_unlock(&wl->mutex);
3866
3867         b43legacydbg(wl, "Device resumed.\n");
3868 out:
3869         return err;
3870 }
3871
3872 #else   /* CONFIG_PM */
3873 # define b43legacy_suspend      NULL
3874 # define b43legacy_resume               NULL
3875 #endif  /* CONFIG_PM */
3876
3877 static struct ssb_driver b43legacy_ssb_driver = {
3878         .name           = KBUILD_MODNAME,
3879         .id_table       = b43legacy_ssb_tbl,
3880         .probe          = b43legacy_probe,
3881         .remove         = b43legacy_remove,
3882         .suspend        = b43legacy_suspend,
3883         .resume         = b43legacy_resume,
3884 };
3885
3886 static void b43legacy_print_driverinfo(void)
3887 {
3888         const char *feat_pci = "", *feat_leds = "", *feat_rfkill = "",
3889                    *feat_pio = "", *feat_dma = "";
3890
3891 #ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
3892         feat_pci = "P";
3893 #endif
3894 #ifdef CONFIG_B43LEGACY_LEDS
3895         feat_leds = "L";
3896 #endif
3897 #ifdef CONFIG_B43LEGACY_RFKILL
3898         feat_rfkill = "R";
3899 #endif
3900 #ifdef CONFIG_B43LEGACY_PIO
3901         feat_pio = "I";
3902 #endif
3903 #ifdef CONFIG_B43LEGACY_DMA
3904         feat_dma = "D";
3905 #endif
3906         printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
3907                "[ Features: %s%s%s%s%s, Firmware-ID: "
3908                B43legacy_SUPPORTED_FIRMWARE_ID " ]\n",
3909                feat_pci, feat_leds, feat_rfkill, feat_pio, feat_dma);
3910 }
3911
3912 static int __init b43legacy_init(void)
3913 {
3914         int err;
3915
3916         b43legacy_debugfs_init();
3917
3918         err = ssb_driver_register(&b43legacy_ssb_driver);
3919         if (err)
3920                 goto err_dfs_exit;
3921
3922         b43legacy_print_driverinfo();
3923
3924         return err;
3925
3926 err_dfs_exit:
3927         b43legacy_debugfs_exit();
3928         return err;
3929 }
3930
3931 static void __exit b43legacy_exit(void)
3932 {
3933         ssb_driver_unregister(&b43legacy_ssb_driver);
3934         b43legacy_debugfs_exit();
3935 }
3936
3937 module_init(b43legacy_init)
3938 module_exit(b43legacy_exit)