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   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                 return NETDEV_TX_BUSY;
2383         return NETDEV_TX_OK;
2384 }
2385
2386 static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
2387                                 int queue,
2388                                 const struct ieee80211_tx_queue_params *params)
2389 {
2390         return 0;
2391 }
2392
2393 static int b43legacy_op_get_tx_stats(struct ieee80211_hw *hw,
2394                                      struct ieee80211_tx_queue_stats *stats)
2395 {
2396         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2397         struct b43legacy_wldev *dev = wl->current_dev;
2398         unsigned long flags;
2399         int err = -ENODEV;
2400
2401         if (!dev)
2402                 goto out;
2403         spin_lock_irqsave(&wl->irq_lock, flags);
2404         if (likely(b43legacy_status(dev) >= B43legacy_STAT_STARTED)) {
2405                 if (b43legacy_using_pio(dev))
2406                         b43legacy_pio_get_tx_stats(dev, stats);
2407                 else
2408                         b43legacy_dma_get_tx_stats(dev, stats);
2409                 err = 0;
2410         }
2411         spin_unlock_irqrestore(&wl->irq_lock, flags);
2412 out:
2413         return err;
2414 }
2415
2416 static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
2417                                   struct ieee80211_low_level_stats *stats)
2418 {
2419         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2420         unsigned long flags;
2421
2422         spin_lock_irqsave(&wl->irq_lock, flags);
2423         memcpy(stats, &wl->ieee_stats, sizeof(*stats));
2424         spin_unlock_irqrestore(&wl->irq_lock, flags);
2425
2426         return 0;
2427 }
2428
2429 static const char *phymode_to_string(unsigned int phymode)
2430 {
2431         switch (phymode) {
2432         case B43legacy_PHYMODE_B:
2433                 return "B";
2434         case B43legacy_PHYMODE_G:
2435                 return "G";
2436         default:
2437                 B43legacy_BUG_ON(1);
2438         }
2439         return "";
2440 }
2441
2442 static int find_wldev_for_phymode(struct b43legacy_wl *wl,
2443                                   unsigned int phymode,
2444                                   struct b43legacy_wldev **dev,
2445                                   bool *gmode)
2446 {
2447         struct b43legacy_wldev *d;
2448
2449         list_for_each_entry(d, &wl->devlist, list) {
2450                 if (d->phy.possible_phymodes & phymode) {
2451                         /* Ok, this device supports the PHY-mode.
2452                          * Set the gmode bit. */
2453                         *gmode = 1;
2454                         *dev = d;
2455
2456                         return 0;
2457                 }
2458         }
2459
2460         return -ESRCH;
2461 }
2462
2463 static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
2464 {
2465         struct ssb_device *sdev = dev->dev;
2466         u32 tmslow;
2467
2468         tmslow = ssb_read32(sdev, SSB_TMSLOW);
2469         tmslow &= ~B43legacy_TMSLOW_GMODE;
2470         tmslow |= B43legacy_TMSLOW_PHYRESET;
2471         tmslow |= SSB_TMSLOW_FGC;
2472         ssb_write32(sdev, SSB_TMSLOW, tmslow);
2473         msleep(1);
2474
2475         tmslow = ssb_read32(sdev, SSB_TMSLOW);
2476         tmslow &= ~SSB_TMSLOW_FGC;
2477         tmslow |= B43legacy_TMSLOW_PHYRESET;
2478         ssb_write32(sdev, SSB_TMSLOW, tmslow);
2479         msleep(1);
2480 }
2481
2482 /* Expects wl->mutex locked */
2483 static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
2484                                       unsigned int new_mode)
2485 {
2486         struct b43legacy_wldev *up_dev;
2487         struct b43legacy_wldev *down_dev;
2488         int err;
2489         bool gmode = 0;
2490         int prev_status;
2491
2492         err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
2493         if (err) {
2494                 b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
2495                        phymode_to_string(new_mode));
2496                 return err;
2497         }
2498         if ((up_dev == wl->current_dev) &&
2499             (!!wl->current_dev->phy.gmode == !!gmode))
2500                 /* This device is already running. */
2501                 return 0;
2502         b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
2503                phymode_to_string(new_mode));
2504         down_dev = wl->current_dev;
2505
2506         prev_status = b43legacy_status(down_dev);
2507         /* Shutdown the currently running core. */
2508         if (prev_status >= B43legacy_STAT_STARTED)
2509                 b43legacy_wireless_core_stop(down_dev);
2510         if (prev_status >= B43legacy_STAT_INITIALIZED)
2511                 b43legacy_wireless_core_exit(down_dev);
2512
2513         if (down_dev != up_dev)
2514                 /* We switch to a different core, so we put PHY into
2515                  * RESET on the old core. */
2516                 b43legacy_put_phy_into_reset(down_dev);
2517
2518         /* Now start the new core. */
2519         up_dev->phy.gmode = gmode;
2520         if (prev_status >= B43legacy_STAT_INITIALIZED) {
2521                 err = b43legacy_wireless_core_init(up_dev);
2522                 if (err) {
2523                         b43legacyerr(wl, "Fatal: Could not initialize device"
2524                                      " for newly selected %s-PHY mode\n",
2525                                      phymode_to_string(new_mode));
2526                         goto init_failure;
2527                 }
2528         }
2529         if (prev_status >= B43legacy_STAT_STARTED) {
2530                 err = b43legacy_wireless_core_start(up_dev);
2531                 if (err) {
2532                         b43legacyerr(wl, "Fatal: Coult not start device for "
2533                                "newly selected %s-PHY mode\n",
2534                                phymode_to_string(new_mode));
2535                         b43legacy_wireless_core_exit(up_dev);
2536                         goto init_failure;
2537                 }
2538         }
2539         B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
2540
2541         b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
2542
2543         wl->current_dev = up_dev;
2544
2545         return 0;
2546 init_failure:
2547         /* Whoops, failed to init the new core. No core is operating now. */
2548         wl->current_dev = NULL;
2549         return err;
2550 }
2551
2552 static int b43legacy_antenna_from_ieee80211(u8 antenna)
2553 {
2554         switch (antenna) {
2555         case 0: /* default/diversity */
2556                 return B43legacy_ANTENNA_DEFAULT;
2557         case 1: /* Antenna 0 */
2558                 return B43legacy_ANTENNA0;
2559         case 2: /* Antenna 1 */
2560                 return B43legacy_ANTENNA1;
2561         default:
2562                 return B43legacy_ANTENNA_DEFAULT;
2563         }
2564 }
2565
2566 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
2567                                    struct ieee80211_conf *conf)
2568 {
2569         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2570         struct b43legacy_wldev *dev;
2571         struct b43legacy_phy *phy;
2572         unsigned long flags;
2573         unsigned int new_phymode = 0xFFFF;
2574         int antenna_tx;
2575         int antenna_rx;
2576         int err = 0;
2577         u32 savedirqs;
2578
2579         antenna_tx = b43legacy_antenna_from_ieee80211(conf->antenna_sel_tx);
2580         antenna_rx = b43legacy_antenna_from_ieee80211(conf->antenna_sel_rx);
2581
2582         mutex_lock(&wl->mutex);
2583         dev = wl->current_dev;
2584         phy = &dev->phy;
2585
2586         /* Switch the PHY mode (if necessary). */
2587         switch (conf->channel->band) {
2588         case IEEE80211_BAND_2GHZ:
2589                 if (phy->type == B43legacy_PHYTYPE_B)
2590                         new_phymode = B43legacy_PHYMODE_B;
2591                 else
2592                         new_phymode = B43legacy_PHYMODE_G;
2593                 break;
2594         default:
2595                 B43legacy_WARN_ON(1);
2596         }
2597         err = b43legacy_switch_phymode(wl, new_phymode);
2598         if (err)
2599                 goto out_unlock_mutex;
2600
2601         /* Disable IRQs while reconfiguring the device.
2602          * This makes it possible to drop the spinlock throughout
2603          * the reconfiguration process. */
2604         spin_lock_irqsave(&wl->irq_lock, flags);
2605         if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2606                 spin_unlock_irqrestore(&wl->irq_lock, flags);
2607                 goto out_unlock_mutex;
2608         }
2609         savedirqs = b43legacy_interrupt_disable(dev, B43legacy_IRQ_ALL);
2610         spin_unlock_irqrestore(&wl->irq_lock, flags);
2611         b43legacy_synchronize_irq(dev);
2612
2613         /* Switch to the requested channel.
2614          * The firmware takes care of races with the TX handler. */
2615         if (conf->channel->hw_value != phy->channel)
2616                 b43legacy_radio_selectchannel(dev, conf->channel->hw_value, 0);
2617
2618         /* Enable/Disable ShortSlot timing. */
2619         if ((!!(conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME))
2620              != dev->short_slot) {
2621                 B43legacy_WARN_ON(phy->type != B43legacy_PHYTYPE_G);
2622                 if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME)
2623                         b43legacy_short_slot_timing_enable(dev);
2624                 else
2625                         b43legacy_short_slot_timing_disable(dev);
2626         }
2627
2628         dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
2629
2630         /* Adjust the desired TX power level. */
2631         if (conf->power_level != 0) {
2632                 if (conf->power_level != phy->power_level) {
2633                         phy->power_level = conf->power_level;
2634                         b43legacy_phy_xmitpower(dev);
2635                 }
2636         }
2637
2638         /* Antennas for RX and management frame TX. */
2639         b43legacy_mgmtframe_txantenna(dev, antenna_tx);
2640
2641         /* Update templates for AP mode. */
2642         if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP))
2643                 b43legacy_set_beacon_int(dev, conf->beacon_int);
2644
2645
2646         if (!!conf->radio_enabled != phy->radio_on) {
2647                 if (conf->radio_enabled) {
2648                         b43legacy_radio_turn_on(dev);
2649                         b43legacyinfo(dev->wl, "Radio turned on by software\n");
2650                         if (!dev->radio_hw_enable)
2651                                 b43legacyinfo(dev->wl, "The hardware RF-kill"
2652                                               " button still turns the radio"
2653                                               " physically off. Press the"
2654                                               " button to turn it on.\n");
2655                 } else {
2656                         b43legacy_radio_turn_off(dev, 0);
2657                         b43legacyinfo(dev->wl, "Radio turned off by"
2658                                       " software\n");
2659                 }
2660         }
2661
2662         spin_lock_irqsave(&wl->irq_lock, flags);
2663         b43legacy_interrupt_enable(dev, savedirqs);
2664         mmiowb();
2665         spin_unlock_irqrestore(&wl->irq_lock, flags);
2666 out_unlock_mutex:
2667         mutex_unlock(&wl->mutex);
2668
2669         return err;
2670 }
2671
2672 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
2673                                           unsigned int changed,
2674                                           unsigned int *fflags,
2675                                           int mc_count,
2676                                           struct dev_addr_list *mc_list)
2677 {
2678         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2679         struct b43legacy_wldev *dev = wl->current_dev;
2680         unsigned long flags;
2681
2682         if (!dev) {
2683                 *fflags = 0;
2684                 return;
2685         }
2686
2687         spin_lock_irqsave(&wl->irq_lock, flags);
2688         *fflags &= FIF_PROMISC_IN_BSS |
2689                   FIF_ALLMULTI |
2690                   FIF_FCSFAIL |
2691                   FIF_PLCPFAIL |
2692                   FIF_CONTROL |
2693                   FIF_OTHER_BSS |
2694                   FIF_BCN_PRBRESP_PROMISC;
2695
2696         changed &= FIF_PROMISC_IN_BSS |
2697                    FIF_ALLMULTI |
2698                    FIF_FCSFAIL |
2699                    FIF_PLCPFAIL |
2700                    FIF_CONTROL |
2701                    FIF_OTHER_BSS |
2702                    FIF_BCN_PRBRESP_PROMISC;
2703
2704         wl->filter_flags = *fflags;
2705
2706         if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
2707                 b43legacy_adjust_opmode(dev);
2708         spin_unlock_irqrestore(&wl->irq_lock, flags);
2709 }
2710
2711 static int b43legacy_op_config_interface(struct ieee80211_hw *hw,
2712                                          struct ieee80211_vif *vif,
2713                                          struct ieee80211_if_conf *conf)
2714 {
2715         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2716         struct b43legacy_wldev *dev = wl->current_dev;
2717         unsigned long flags;
2718
2719         if (!dev)
2720                 return -ENODEV;
2721         mutex_lock(&wl->mutex);
2722         spin_lock_irqsave(&wl->irq_lock, flags);
2723         B43legacy_WARN_ON(wl->vif != vif);
2724         if (conf->bssid)
2725                 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
2726         else
2727                 memset(wl->bssid, 0, ETH_ALEN);
2728         if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
2729                 if (b43legacy_is_mode(wl, IEEE80211_IF_TYPE_AP)) {
2730                         B43legacy_WARN_ON(conf->type != IEEE80211_IF_TYPE_AP);
2731                         b43legacy_set_ssid(dev, conf->ssid, conf->ssid_len);
2732                         if (conf->beacon)
2733                                 b43legacy_update_templates(wl, conf->beacon);
2734                 }
2735                 b43legacy_write_mac_bssid_templates(dev);
2736         }
2737         spin_unlock_irqrestore(&wl->irq_lock, flags);
2738         mutex_unlock(&wl->mutex);
2739
2740         return 0;
2741 }
2742
2743 /* Locking: wl->mutex */
2744 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
2745 {
2746         struct b43legacy_wl *wl = dev->wl;
2747         unsigned long flags;
2748
2749         if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
2750                 return;
2751
2752         /* Disable and sync interrupts. We must do this before than
2753          * setting the status to INITIALIZED, as the interrupt handler
2754          * won't care about IRQs then. */
2755         spin_lock_irqsave(&wl->irq_lock, flags);
2756         dev->irq_savedstate = b43legacy_interrupt_disable(dev,
2757                                                           B43legacy_IRQ_ALL);
2758         b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
2759         spin_unlock_irqrestore(&wl->irq_lock, flags);
2760         b43legacy_synchronize_irq(dev);
2761
2762         b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
2763
2764         mutex_unlock(&wl->mutex);
2765         /* Must unlock as it would otherwise deadlock. No races here.
2766          * Cancel the possibly running self-rearming periodic work. */
2767         cancel_delayed_work_sync(&dev->periodic_work);
2768         mutex_lock(&wl->mutex);
2769
2770         ieee80211_stop_queues(wl->hw); /* FIXME this could cause a deadlock */
2771
2772         b43legacy_mac_suspend(dev);
2773         free_irq(dev->dev->irq, dev);
2774         b43legacydbg(wl, "Wireless interface stopped\n");
2775 }
2776
2777 /* Locking: wl->mutex */
2778 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
2779 {
2780         int err;
2781
2782         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
2783
2784         drain_txstatus_queue(dev);
2785         err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
2786                           IRQF_SHARED, KBUILD_MODNAME, dev);
2787         if (err) {
2788                 b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
2789                        dev->dev->irq);
2790                 goto out;
2791         }
2792         /* We are ready to run. */
2793         b43legacy_set_status(dev, B43legacy_STAT_STARTED);
2794
2795         /* Start data flow (TX/RX) */
2796         b43legacy_mac_enable(dev);
2797         b43legacy_interrupt_enable(dev, dev->irq_savedstate);
2798         ieee80211_start_queues(dev->wl->hw);
2799
2800         /* Start maintenance work */
2801         b43legacy_periodic_tasks_setup(dev);
2802
2803         b43legacydbg(dev->wl, "Wireless interface started\n");
2804 out:
2805         return err;
2806 }
2807
2808 /* Get PHY and RADIO versioning numbers */
2809 static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
2810 {
2811         struct b43legacy_phy *phy = &dev->phy;
2812         u32 tmp;
2813         u8 analog_type;
2814         u8 phy_type;
2815         u8 phy_rev;
2816         u16 radio_manuf;
2817         u16 radio_ver;
2818         u16 radio_rev;
2819         int unsupported = 0;
2820
2821         /* Get PHY versioning */
2822         tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
2823         analog_type = (tmp & B43legacy_PHYVER_ANALOG)
2824                       >> B43legacy_PHYVER_ANALOG_SHIFT;
2825         phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
2826         phy_rev = (tmp & B43legacy_PHYVER_VERSION);
2827         switch (phy_type) {
2828         case B43legacy_PHYTYPE_B:
2829                 if (phy_rev != 2 && phy_rev != 4
2830                     && phy_rev != 6 && phy_rev != 7)
2831                         unsupported = 1;
2832                 break;
2833         case B43legacy_PHYTYPE_G:
2834                 if (phy_rev > 8)
2835                         unsupported = 1;
2836                 break;
2837         default:
2838                 unsupported = 1;
2839         };
2840         if (unsupported) {
2841                 b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
2842                        "(Analog %u, Type %u, Revision %u)\n",
2843                        analog_type, phy_type, phy_rev);
2844                 return -EOPNOTSUPP;
2845         }
2846         b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
2847                analog_type, phy_type, phy_rev);
2848
2849
2850         /* Get RADIO versioning */
2851         if (dev->dev->bus->chip_id == 0x4317) {
2852                 if (dev->dev->bus->chip_rev == 0)
2853                         tmp = 0x3205017F;
2854                 else if (dev->dev->bus->chip_rev == 1)
2855                         tmp = 0x4205017F;
2856                 else
2857                         tmp = 0x5205017F;
2858         } else {
2859                 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
2860                                   B43legacy_RADIOCTL_ID);
2861                 tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
2862                 tmp <<= 16;
2863                 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
2864                                   B43legacy_RADIOCTL_ID);
2865                 tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
2866         }
2867         radio_manuf = (tmp & 0x00000FFF);
2868         radio_ver = (tmp & 0x0FFFF000) >> 12;
2869         radio_rev = (tmp & 0xF0000000) >> 28;
2870         switch (phy_type) {
2871         case B43legacy_PHYTYPE_B:
2872                 if ((radio_ver & 0xFFF0) != 0x2050)
2873                         unsupported = 1;
2874                 break;
2875         case B43legacy_PHYTYPE_G:
2876                 if (radio_ver != 0x2050)
2877                         unsupported = 1;
2878                 break;
2879         default:
2880                 B43legacy_BUG_ON(1);
2881         }
2882         if (unsupported) {
2883                 b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
2884                        "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
2885                        radio_manuf, radio_ver, radio_rev);
2886                 return -EOPNOTSUPP;
2887         }
2888         b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
2889                      " Revision %u\n", radio_manuf, radio_ver, radio_rev);
2890
2891
2892         phy->radio_manuf = radio_manuf;
2893         phy->radio_ver = radio_ver;
2894         phy->radio_rev = radio_rev;
2895
2896         phy->analog = analog_type;
2897         phy->type = phy_type;
2898         phy->rev = phy_rev;
2899
2900         return 0;
2901 }
2902
2903 static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
2904                                       struct b43legacy_phy *phy)
2905 {
2906         struct b43legacy_lopair *lo;
2907         int i;
2908
2909         memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
2910         memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
2911
2912         /* Assume the radio is enabled. If it's not enabled, the state will
2913          * immediately get fixed on the first periodic work run. */
2914         dev->radio_hw_enable = 1;
2915
2916         phy->savedpctlreg = 0xFFFF;
2917         phy->aci_enable = 0;
2918         phy->aci_wlan_automatic = 0;
2919         phy->aci_hw_rssi = 0;
2920
2921         lo = phy->_lo_pairs;
2922         if (lo)
2923                 memset(lo, 0, sizeof(struct b43legacy_lopair) *
2924                                      B43legacy_LO_COUNT);
2925         phy->max_lb_gain = 0;
2926         phy->trsw_rx_gain = 0;
2927
2928         /* Set default attenuation values. */
2929         phy->bbatt = b43legacy_default_baseband_attenuation(dev);
2930         phy->rfatt = b43legacy_default_radio_attenuation(dev);
2931         phy->txctl1 = b43legacy_default_txctl1(dev);
2932         phy->txpwr_offset = 0;
2933
2934         /* NRSSI */
2935         phy->nrssislope = 0;
2936         for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
2937                 phy->nrssi[i] = -1000;
2938         for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
2939                 phy->nrssi_lt[i] = i;
2940
2941         phy->lofcal = 0xFFFF;
2942         phy->initval = 0xFFFF;
2943
2944         phy->interfmode = B43legacy_INTERFMODE_NONE;
2945         phy->channel = 0xFF;
2946 }
2947
2948 static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
2949 {
2950         /* Flags */
2951         dev->dfq_valid = 0;
2952
2953         /* Stats */
2954         memset(&dev->stats, 0, sizeof(dev->stats));
2955
2956         setup_struct_phy_for_init(dev, &dev->phy);
2957
2958         /* IRQ related flags */
2959         dev->irq_reason = 0;
2960         memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
2961         dev->irq_savedstate = B43legacy_IRQ_MASKTEMPLATE;
2962
2963         dev->mac_suspended = 1;
2964
2965         /* Noise calculation context */
2966         memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
2967 }
2968
2969 static void b43legacy_imcfglo_timeouts_workaround(struct b43legacy_wldev *dev)
2970 {
2971 #ifdef CONFIG_SSB_DRIVER_PCICORE
2972         struct ssb_bus *bus = dev->dev->bus;
2973         u32 tmp;
2974
2975         if (bus->pcicore.dev &&
2976             bus->pcicore.dev->id.coreid == SSB_DEV_PCI &&
2977             bus->pcicore.dev->id.revision <= 5) {
2978                 /* IMCFGLO timeouts workaround. */
2979                 tmp = ssb_read32(dev->dev, SSB_IMCFGLO);
2980                 tmp &= ~SSB_IMCFGLO_REQTO;
2981                 tmp &= ~SSB_IMCFGLO_SERTO;
2982                 switch (bus->bustype) {
2983                 case SSB_BUSTYPE_PCI:
2984                 case SSB_BUSTYPE_PCMCIA:
2985                         tmp |= 0x32;
2986                         break;
2987                 case SSB_BUSTYPE_SSB:
2988                         tmp |= 0x53;
2989                         break;
2990                 }
2991                 ssb_write32(dev->dev, SSB_IMCFGLO, tmp);
2992         }
2993 #endif /* CONFIG_SSB_DRIVER_PCICORE */
2994 }
2995
2996 /* Write the short and long frame retry limit values. */
2997 static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
2998                                        unsigned int short_retry,
2999                                        unsigned int long_retry)
3000 {
3001         /* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
3002          * the chip-internal counter. */
3003         short_retry = min(short_retry, (unsigned int)0xF);
3004         long_retry = min(long_retry, (unsigned int)0xF);
3005
3006         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
3007         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
3008 }
3009
3010 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
3011                                           bool idle) {
3012         u16 pu_delay = 1050;
3013
3014         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_IBSS) || idle)
3015                 pu_delay = 500;
3016         if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
3017                 pu_delay = max(pu_delay, (u16)2400);
3018
3019         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3020                               B43legacy_SHM_SH_SPUWKUP, pu_delay);
3021 }
3022
3023 /* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
3024 static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
3025 {
3026         u16 pretbtt;
3027
3028         /* The time value is in microseconds. */
3029         if (b43legacy_is_mode(dev->wl, IEEE80211_IF_TYPE_IBSS))
3030                 pretbtt = 2;
3031         else
3032                 pretbtt = 250;
3033         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3034                               B43legacy_SHM_SH_PRETBTT, pretbtt);
3035         b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
3036 }
3037
3038 /* Shutdown a wireless core */
3039 /* Locking: wl->mutex */
3040 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
3041 {
3042         struct b43legacy_wl *wl = dev->wl;
3043         struct b43legacy_phy *phy = &dev->phy;
3044         u32 macctl;
3045
3046         B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
3047         if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
3048                 return;
3049         b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
3050
3051         /* Stop the microcode PSM. */
3052         macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
3053         macctl &= ~B43legacy_MACCTL_PSM_RUN;
3054         macctl |= B43legacy_MACCTL_PSM_JMP0;
3055         b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
3056
3057         mutex_unlock(&wl->mutex);
3058         /* Must unlock as it would otherwise deadlock. No races here.
3059          * Cancel possibly pending workqueues. */
3060         cancel_work_sync(&dev->restart_work);
3061         mutex_lock(&wl->mutex);
3062
3063         b43legacy_leds_exit(dev);
3064         b43legacy_rng_exit(dev->wl);
3065         b43legacy_pio_free(dev);
3066         b43legacy_dma_free(dev);
3067         b43legacy_chip_exit(dev);
3068         b43legacy_radio_turn_off(dev, 1);
3069         b43legacy_switch_analog(dev, 0);
3070         if (phy->dyn_tssi_tbl)
3071                 kfree(phy->tssi2dbm);
3072         kfree(phy->lo_control);
3073         phy->lo_control = NULL;
3074         if (dev->wl->current_beacon) {
3075                 dev_kfree_skb_any(dev->wl->current_beacon);
3076                 dev->wl->current_beacon = NULL;
3077         }
3078
3079         ssb_device_disable(dev->dev, 0);
3080         ssb_bus_may_powerdown(dev->dev->bus);
3081 }
3082
3083 static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
3084 {
3085         struct b43legacy_phy *phy = &dev->phy;
3086         int i;
3087
3088         /* Set default attenuation values. */
3089         phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3090         phy->rfatt = b43legacy_default_radio_attenuation(dev);
3091         phy->txctl1 = b43legacy_default_txctl1(dev);
3092         phy->txctl2 = 0xFFFF;
3093         phy->txpwr_offset = 0;
3094
3095         /* NRSSI */
3096         phy->nrssislope = 0;
3097         for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3098                 phy->nrssi[i] = -1000;
3099         for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3100                 phy->nrssi_lt[i] = i;
3101
3102         phy->lofcal = 0xFFFF;
3103         phy->initval = 0xFFFF;
3104
3105         phy->aci_enable = 0;
3106         phy->aci_wlan_automatic = 0;
3107         phy->aci_hw_rssi = 0;
3108
3109         phy->antenna_diversity = 0xFFFF;
3110         memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3111         memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3112
3113         /* Flags */
3114         phy->calibrated = 0;
3115
3116         if (phy->_lo_pairs)
3117                 memset(phy->_lo_pairs, 0,
3118                        sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
3119         memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
3120 }
3121
3122 /* Initialize a wireless core */
3123 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
3124 {
3125         struct b43legacy_wl *wl = dev->wl;
3126         struct ssb_bus *bus = dev->dev->bus;
3127         struct b43legacy_phy *phy = &dev->phy;
3128         struct ssb_sprom *sprom = &dev->dev->bus->sprom;
3129         int err;
3130         u32 hf;
3131         u32 tmp;
3132
3133         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3134
3135         err = ssb_bus_powerup(bus, 0);
3136         if (err)
3137                 goto out;
3138         if (!ssb_device_is_enabled(dev->dev)) {
3139                 tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
3140                 b43legacy_wireless_core_reset(dev, tmp);
3141         }
3142
3143         if ((phy->type == B43legacy_PHYTYPE_B) ||
3144             (phy->type == B43legacy_PHYTYPE_G)) {
3145                 phy->_lo_pairs = kzalloc(sizeof(struct b43legacy_lopair)
3146                                          * B43legacy_LO_COUNT,
3147                                          GFP_KERNEL);
3148                 if (!phy->_lo_pairs)
3149                         return -ENOMEM;
3150         }
3151         setup_struct_wldev_for_init(dev);
3152
3153         err = b43legacy_phy_init_tssi2dbm_table(dev);
3154         if (err)
3155                 goto err_kfree_lo_control;
3156
3157         /* Enable IRQ routing to this device. */
3158         ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
3159
3160         b43legacy_imcfglo_timeouts_workaround(dev);
3161         prepare_phy_data_for_init(dev);
3162         b43legacy_phy_calibrate(dev);
3163         err = b43legacy_chip_init(dev);
3164         if (err)
3165                 goto err_kfree_tssitbl;
3166         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3167                               B43legacy_SHM_SH_WLCOREREV,
3168                               dev->dev->id.revision);
3169         hf = b43legacy_hf_read(dev);
3170         if (phy->type == B43legacy_PHYTYPE_G) {
3171                 hf |= B43legacy_HF_SYMW;
3172                 if (phy->rev == 1)
3173                         hf |= B43legacy_HF_GDCW;
3174                 if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
3175                         hf |= B43legacy_HF_OFDMPABOOST;
3176         } else if (phy->type == B43legacy_PHYTYPE_B) {
3177                 hf |= B43legacy_HF_SYMW;
3178                 if (phy->rev >= 2 && phy->radio_ver == 0x2050)
3179                         hf &= ~B43legacy_HF_GDCW;
3180         }
3181         b43legacy_hf_write(dev, hf);
3182
3183         b43legacy_set_retry_limits(dev,
3184                                    B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
3185                                    B43legacy_DEFAULT_LONG_RETRY_LIMIT);
3186
3187         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3188                               0x0044, 3);
3189         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3190                               0x0046, 2);
3191
3192         /* Disable sending probe responses from firmware.
3193          * Setting the MaxTime to one usec will always trigger
3194          * a timeout, so we never send any probe resp.
3195          * A timeout of zero is infinite. */
3196         b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3197                               B43legacy_SHM_SH_PRMAXTIME, 1);
3198
3199         b43legacy_rate_memory_init(dev);
3200
3201         /* Minimum Contention Window */
3202         if (phy->type == B43legacy_PHYTYPE_B)
3203                 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3204                                       0x0003, 31);
3205         else
3206                 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3207                                       0x0003, 15);
3208         /* Maximum Contention Window */
3209         b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3210                               0x0004, 1023);
3211
3212         do {
3213                 if (b43legacy_using_pio(dev))
3214                         err = b43legacy_pio_init(dev);
3215                 else {
3216                         err = b43legacy_dma_init(dev);
3217                         if (!err)
3218                                 b43legacy_qos_init(dev);
3219                 }
3220         } while (err == -EAGAIN);
3221         if (err)
3222                 goto err_chip_exit;
3223
3224         b43legacy_set_synth_pu_delay(dev, 1);
3225
3226         ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
3227         b43legacy_upload_card_macaddress(dev);
3228         b43legacy_security_init(dev);
3229         b43legacy_rng_init(wl);
3230
3231         b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
3232
3233         b43legacy_leds_init(dev);
3234 out:
3235         return err;
3236
3237 err_chip_exit:
3238         b43legacy_chip_exit(dev);
3239 err_kfree_tssitbl:
3240         if (phy->dyn_tssi_tbl)
3241                 kfree(phy->tssi2dbm);
3242 err_kfree_lo_control:
3243         kfree(phy->lo_control);
3244         phy->lo_control = NULL;
3245         ssb_bus_may_powerdown(bus);
3246         B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3247         return err;
3248 }
3249
3250 static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
3251                                       struct ieee80211_if_init_conf *conf)
3252 {
3253         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3254         struct b43legacy_wldev *dev;
3255         unsigned long flags;
3256         int err = -EOPNOTSUPP;
3257
3258         /* TODO: allow WDS/AP devices to coexist */
3259
3260         if (conf->type != IEEE80211_IF_TYPE_AP &&
3261             conf->type != IEEE80211_IF_TYPE_STA &&
3262             conf->type != IEEE80211_IF_TYPE_WDS &&
3263             conf->type != IEEE80211_IF_TYPE_IBSS)
3264                 return -EOPNOTSUPP;
3265
3266         mutex_lock(&wl->mutex);
3267         if (wl->operating)
3268                 goto out_mutex_unlock;
3269
3270         b43legacydbg(wl, "Adding Interface type %d\n", conf->type);
3271
3272         dev = wl->current_dev;
3273         wl->operating = 1;
3274         wl->vif = conf->vif;
3275         wl->if_type = conf->type;
3276         memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
3277
3278         spin_lock_irqsave(&wl->irq_lock, flags);
3279         b43legacy_adjust_opmode(dev);
3280         b43legacy_set_pretbtt(dev);
3281         b43legacy_set_synth_pu_delay(dev, 0);
3282         b43legacy_upload_card_macaddress(dev);
3283         spin_unlock_irqrestore(&wl->irq_lock, flags);
3284
3285         err = 0;
3286  out_mutex_unlock:
3287         mutex_unlock(&wl->mutex);
3288
3289         return err;
3290 }
3291
3292 static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
3293                                           struct ieee80211_if_init_conf *conf)
3294 {
3295         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3296         struct b43legacy_wldev *dev = wl->current_dev;
3297         unsigned long flags;
3298
3299         b43legacydbg(wl, "Removing Interface type %d\n", conf->type);
3300
3301         mutex_lock(&wl->mutex);
3302
3303         B43legacy_WARN_ON(!wl->operating);
3304         B43legacy_WARN_ON(wl->vif != conf->vif);
3305         wl->vif = NULL;
3306
3307         wl->operating = 0;
3308
3309         spin_lock_irqsave(&wl->irq_lock, flags);
3310         b43legacy_adjust_opmode(dev);
3311         memset(wl->mac_addr, 0, ETH_ALEN);
3312         b43legacy_upload_card_macaddress(dev);
3313         spin_unlock_irqrestore(&wl->irq_lock, flags);
3314
3315         mutex_unlock(&wl->mutex);
3316 }
3317
3318 static int b43legacy_op_start(struct ieee80211_hw *hw)
3319 {
3320         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3321         struct b43legacy_wldev *dev = wl->current_dev;
3322         int did_init = 0;
3323         int err = 0;
3324         bool do_rfkill_exit = 0;
3325
3326         /* First register RFkill.
3327          * LEDs that are registered later depend on it. */
3328         b43legacy_rfkill_init(dev);
3329
3330         /* Kill all old instance specific information to make sure
3331          * the card won't use it in the short timeframe between start
3332          * and mac80211 reconfiguring it. */
3333         memset(wl->bssid, 0, ETH_ALEN);
3334         memset(wl->mac_addr, 0, ETH_ALEN);
3335         wl->filter_flags = 0;
3336
3337         mutex_lock(&wl->mutex);
3338
3339         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
3340                 err = b43legacy_wireless_core_init(dev);
3341                 if (err) {
3342                         do_rfkill_exit = 1;
3343                         goto out_mutex_unlock;
3344                 }
3345                 did_init = 1;
3346         }
3347
3348         if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
3349                 err = b43legacy_wireless_core_start(dev);
3350                 if (err) {
3351                         if (did_init)
3352                                 b43legacy_wireless_core_exit(dev);
3353                         do_rfkill_exit = 1;
3354                         goto out_mutex_unlock;
3355                 }
3356         }
3357
3358 out_mutex_unlock:
3359         mutex_unlock(&wl->mutex);
3360
3361         if (do_rfkill_exit)
3362                 b43legacy_rfkill_exit(dev);
3363
3364         return err;
3365 }
3366
3367 static void b43legacy_op_stop(struct ieee80211_hw *hw)
3368 {
3369         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3370         struct b43legacy_wldev *dev = wl->current_dev;
3371
3372         b43legacy_rfkill_exit(dev);
3373
3374         mutex_lock(&wl->mutex);
3375         if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
3376                 b43legacy_wireless_core_stop(dev);
3377         b43legacy_wireless_core_exit(dev);
3378         mutex_unlock(&wl->mutex);
3379 }
3380
3381 static int b43legacy_op_set_retry_limit(struct ieee80211_hw *hw,
3382                                         u32 short_retry_limit,
3383                                         u32 long_retry_limit)
3384 {
3385         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3386         struct b43legacy_wldev *dev;
3387         int err = 0;
3388
3389         mutex_lock(&wl->mutex);
3390         dev = wl->current_dev;
3391         if (unlikely(!dev ||
3392                      (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED))) {
3393                 err = -ENODEV;
3394                 goto out_unlock;
3395         }
3396         b43legacy_set_retry_limits(dev, short_retry_limit, long_retry_limit);
3397 out_unlock:
3398         mutex_unlock(&wl->mutex);
3399
3400         return err;
3401 }
3402
3403 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
3404                                        int aid, int set)
3405 {
3406         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3407         struct sk_buff *beacon;
3408         unsigned long flags;
3409
3410         /* We could modify the existing beacon and set the aid bit in the TIM
3411          * field, but that would probably require resizing and moving of data
3412          * within the beacon template. Simply request a new beacon and let
3413          * mac80211 do the hard work. */
3414         beacon = ieee80211_beacon_get(hw, wl->vif, NULL);
3415         if (unlikely(!beacon))
3416                 return -ENOMEM;
3417         spin_lock_irqsave(&wl->irq_lock, flags);
3418         b43legacy_update_templates(wl, beacon);
3419         spin_unlock_irqrestore(&wl->irq_lock, flags);
3420
3421         return 0;
3422 }
3423
3424 static int b43legacy_op_ibss_beacon_update(struct ieee80211_hw *hw,
3425                                            struct sk_buff *beacon,
3426                                            struct ieee80211_tx_control *ctl)
3427 {
3428         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3429         unsigned long flags;
3430
3431         spin_lock_irqsave(&wl->irq_lock, flags);
3432         b43legacy_update_templates(wl, beacon);
3433         spin_unlock_irqrestore(&wl->irq_lock, flags);
3434
3435         return 0;
3436 }
3437
3438 static const struct ieee80211_ops b43legacy_hw_ops = {
3439         .tx                     = b43legacy_op_tx,
3440         .conf_tx                = b43legacy_op_conf_tx,
3441         .add_interface          = b43legacy_op_add_interface,
3442         .remove_interface       = b43legacy_op_remove_interface,
3443         .config                 = b43legacy_op_dev_config,
3444         .config_interface       = b43legacy_op_config_interface,
3445         .configure_filter       = b43legacy_op_configure_filter,
3446         .get_stats              = b43legacy_op_get_stats,
3447         .get_tx_stats           = b43legacy_op_get_tx_stats,
3448         .start                  = b43legacy_op_start,
3449         .stop                   = b43legacy_op_stop,
3450         .set_retry_limit        = b43legacy_op_set_retry_limit,
3451         .set_tim                = b43legacy_op_beacon_set_tim,
3452         .beacon_update          = b43legacy_op_ibss_beacon_update,
3453 };
3454
3455 /* Hard-reset the chip. Do not call this directly.
3456  * Use b43legacy_controller_restart()
3457  */
3458 static void b43legacy_chip_reset(struct work_struct *work)
3459 {
3460         struct b43legacy_wldev *dev =
3461                 container_of(work, struct b43legacy_wldev, restart_work);
3462         struct b43legacy_wl *wl = dev->wl;
3463         int err = 0;
3464         int prev_status;
3465
3466         mutex_lock(&wl->mutex);
3467
3468         prev_status = b43legacy_status(dev);
3469         /* Bring the device down... */
3470         if (prev_status >= B43legacy_STAT_STARTED)
3471                 b43legacy_wireless_core_stop(dev);
3472         if (prev_status >= B43legacy_STAT_INITIALIZED)
3473                 b43legacy_wireless_core_exit(dev);
3474
3475         /* ...and up again. */
3476         if (prev_status >= B43legacy_STAT_INITIALIZED) {
3477                 err = b43legacy_wireless_core_init(dev);
3478                 if (err)
3479                         goto out;
3480         }
3481         if (prev_status >= B43legacy_STAT_STARTED) {
3482                 err = b43legacy_wireless_core_start(dev);
3483                 if (err) {
3484                         b43legacy_wireless_core_exit(dev);
3485                         goto out;
3486                 }
3487         }
3488 out:
3489         mutex_unlock(&wl->mutex);
3490         if (err)
3491                 b43legacyerr(wl, "Controller restart FAILED\n");
3492         else
3493                 b43legacyinfo(wl, "Controller restarted\n");
3494 }
3495
3496 static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
3497                                  int have_bphy,
3498                                  int have_gphy)
3499 {
3500         struct ieee80211_hw *hw = dev->wl->hw;
3501         struct b43legacy_phy *phy = &dev->phy;
3502
3503         phy->possible_phymodes = 0;
3504         if (have_bphy) {
3505                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3506                         &b43legacy_band_2GHz_BPHY;
3507                 phy->possible_phymodes |= B43legacy_PHYMODE_B;
3508         }
3509
3510         if (have_gphy) {
3511                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3512                         &b43legacy_band_2GHz_GPHY;
3513                 phy->possible_phymodes |= B43legacy_PHYMODE_G;
3514         }
3515
3516         return 0;
3517 }
3518
3519 static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
3520 {
3521         /* We release firmware that late to not be required to re-request
3522          * is all the time when we reinit the core. */
3523         b43legacy_release_firmware(dev);
3524 }
3525
3526 static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
3527 {
3528         struct b43legacy_wl *wl = dev->wl;
3529         struct ssb_bus *bus = dev->dev->bus;
3530         struct pci_dev *pdev = bus->host_pci;
3531         int err;
3532         int have_bphy = 0;
3533         int have_gphy = 0;
3534         u32 tmp;
3535
3536         /* Do NOT do any device initialization here.
3537          * Do it in wireless_core_init() instead.
3538          * This function is for gathering basic information about the HW, only.
3539          * Also some structs may be set up here. But most likely you want to
3540          * have that in core_init(), too.
3541          */
3542
3543         err = ssb_bus_powerup(bus, 0);
3544         if (err) {
3545                 b43legacyerr(wl, "Bus powerup failed\n");
3546                 goto out;
3547         }
3548         /* Get the PHY type. */
3549         if (dev->dev->id.revision >= 5) {
3550                 u32 tmshigh;
3551
3552                 tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
3553                 have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
3554                 if (!have_gphy)
3555                         have_bphy = 1;
3556         } else if (dev->dev->id.revision == 4)
3557                 have_gphy = 1;
3558         else
3559                 have_bphy = 1;
3560
3561         dev->phy.gmode = (have_gphy || have_bphy);
3562         tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3563         b43legacy_wireless_core_reset(dev, tmp);
3564
3565         err = b43legacy_phy_versioning(dev);
3566         if (err)
3567                 goto err_powerdown;
3568         /* Check if this device supports multiband. */
3569         if (!pdev ||
3570             (pdev->device != 0x4312 &&
3571              pdev->device != 0x4319 &&
3572              pdev->device != 0x4324)) {
3573                 /* No multiband support. */
3574                 have_bphy = 0;
3575                 have_gphy = 0;
3576                 switch (dev->phy.type) {
3577                 case B43legacy_PHYTYPE_B:
3578                         have_bphy = 1;
3579                         break;
3580                 case B43legacy_PHYTYPE_G:
3581                         have_gphy = 1;
3582                         break;
3583                 default:
3584                         B43legacy_BUG_ON(1);
3585                 }
3586         }
3587         dev->phy.gmode = (have_gphy || have_bphy);
3588         tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3589         b43legacy_wireless_core_reset(dev, tmp);
3590
3591         err = b43legacy_validate_chipaccess(dev);
3592         if (err)
3593                 goto err_powerdown;
3594         err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
3595         if (err)
3596                 goto err_powerdown;
3597
3598         /* Now set some default "current_dev" */
3599         if (!wl->current_dev)
3600                 wl->current_dev = dev;
3601         INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
3602
3603         b43legacy_radio_turn_off(dev, 1);
3604         b43legacy_switch_analog(dev, 0);
3605         ssb_device_disable(dev->dev, 0);
3606         ssb_bus_may_powerdown(bus);
3607
3608 out:
3609         return err;
3610
3611 err_powerdown:
3612         ssb_bus_may_powerdown(bus);
3613         return err;
3614 }
3615
3616 static void b43legacy_one_core_detach(struct ssb_device *dev)
3617 {
3618         struct b43legacy_wldev *wldev;
3619         struct b43legacy_wl *wl;
3620
3621         wldev = ssb_get_drvdata(dev);
3622         wl = wldev->wl;
3623         cancel_work_sync(&wldev->restart_work);
3624         b43legacy_debugfs_remove_device(wldev);
3625         b43legacy_wireless_core_detach(wldev);
3626         list_del(&wldev->list);
3627         wl->nr_devs--;
3628         ssb_set_drvdata(dev, NULL);
3629         kfree(wldev);
3630 }
3631
3632 static int b43legacy_one_core_attach(struct ssb_device *dev,
3633                                      struct b43legacy_wl *wl)
3634 {
3635         struct b43legacy_wldev *wldev;
3636         struct pci_dev *pdev;
3637         int err = -ENOMEM;
3638
3639         if (!list_empty(&wl->devlist)) {
3640                 /* We are not the first core on this chip. */
3641                 pdev = dev->bus->host_pci;
3642                 /* Only special chips support more than one wireless
3643                  * core, although some of the other chips have more than
3644                  * one wireless core as well. Check for this and
3645                  * bail out early.
3646                  */
3647                 if (!pdev ||
3648                     ((pdev->device != 0x4321) &&
3649                      (pdev->device != 0x4313) &&
3650                      (pdev->device != 0x431A))) {
3651                         b43legacydbg(wl, "Ignoring unconnected 802.11 core\n");
3652                         return -ENODEV;
3653                 }
3654         }
3655
3656         wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
3657         if (!wldev)
3658                 goto out;
3659
3660         wldev->dev = dev;
3661         wldev->wl = wl;
3662         b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
3663         wldev->bad_frames_preempt = modparam_bad_frames_preempt;
3664         tasklet_init(&wldev->isr_tasklet,
3665                      (void (*)(unsigned long))b43legacy_interrupt_tasklet,
3666                      (unsigned long)wldev);
3667         if (modparam_pio)
3668                 wldev->__using_pio = 1;
3669         INIT_LIST_HEAD(&wldev->list);
3670
3671         err = b43legacy_wireless_core_attach(wldev);
3672         if (err)
3673                 goto err_kfree_wldev;
3674
3675         list_add(&wldev->list, &wl->devlist);
3676         wl->nr_devs++;
3677         ssb_set_drvdata(dev, wldev);
3678         b43legacy_debugfs_add_device(wldev);
3679 out:
3680         return err;
3681
3682 err_kfree_wldev:
3683         kfree(wldev);
3684         return err;
3685 }
3686
3687 static void b43legacy_sprom_fixup(struct ssb_bus *bus)
3688 {
3689         /* boardflags workarounds */
3690         if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
3691             bus->boardinfo.type == 0x4E &&
3692             bus->boardinfo.rev > 0x40)
3693                 bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
3694 }
3695
3696 static void b43legacy_wireless_exit(struct ssb_device *dev,
3697                                   struct b43legacy_wl *wl)
3698 {
3699         struct ieee80211_hw *hw = wl->hw;
3700
3701         ssb_set_devtypedata(dev, NULL);
3702         ieee80211_free_hw(hw);
3703 }
3704
3705 static int b43legacy_wireless_init(struct ssb_device *dev)
3706 {
3707         struct ssb_sprom *sprom = &dev->bus->sprom;
3708         struct ieee80211_hw *hw;
3709         struct b43legacy_wl *wl;
3710         int err = -ENOMEM;
3711
3712         b43legacy_sprom_fixup(dev->bus);
3713
3714         hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
3715         if (!hw) {
3716                 b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
3717                 goto out;
3718         }
3719
3720         /* fill hw info */
3721         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
3722                     IEEE80211_HW_RX_INCLUDES_FCS;
3723         hw->max_signal = 100;
3724         hw->max_rssi = -110;
3725         hw->max_noise = -110;
3726         hw->queues = 1; /* FIXME: hardware has more queues */
3727         SET_IEEE80211_DEV(hw, dev->dev);
3728         if (is_valid_ether_addr(sprom->et1mac))
3729                 SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
3730         else
3731                 SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
3732
3733         /* Get and initialize struct b43legacy_wl */
3734         wl = hw_to_b43legacy_wl(hw);
3735         memset(wl, 0, sizeof(*wl));
3736         wl->hw = hw;
3737         spin_lock_init(&wl->irq_lock);
3738         spin_lock_init(&wl->leds_lock);
3739         mutex_init(&wl->mutex);
3740         INIT_LIST_HEAD(&wl->devlist);
3741
3742         ssb_set_devtypedata(dev, wl);
3743         b43legacyinfo(wl, "Broadcom %04X WLAN found\n", dev->bus->chip_id);
3744         err = 0;
3745 out:
3746         return err;
3747 }
3748
3749 static int b43legacy_probe(struct ssb_device *dev,
3750                          const struct ssb_device_id *id)
3751 {
3752         struct b43legacy_wl *wl;
3753         int err;
3754         int first = 0;
3755
3756         wl = ssb_get_devtypedata(dev);
3757         if (!wl) {
3758                 /* Probing the first core - setup common struct b43legacy_wl */
3759                 first = 1;
3760                 err = b43legacy_wireless_init(dev);
3761                 if (err)
3762                         goto out;
3763                 wl = ssb_get_devtypedata(dev);
3764                 B43legacy_WARN_ON(!wl);
3765         }
3766         err = b43legacy_one_core_attach(dev, wl);
3767         if (err)
3768                 goto err_wireless_exit;
3769
3770         if (first) {
3771                 err = ieee80211_register_hw(wl->hw);
3772                 if (err)
3773                         goto err_one_core_detach;
3774         }
3775
3776 out:
3777         return err;
3778
3779 err_one_core_detach:
3780         b43legacy_one_core_detach(dev);
3781 err_wireless_exit:
3782         if (first)
3783                 b43legacy_wireless_exit(dev, wl);
3784         return err;
3785 }
3786
3787 static void b43legacy_remove(struct ssb_device *dev)
3788 {
3789         struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
3790         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3791
3792         B43legacy_WARN_ON(!wl);
3793         if (wl->current_dev == wldev)
3794                 ieee80211_unregister_hw(wl->hw);
3795
3796         b43legacy_one_core_detach(dev);
3797
3798         if (list_empty(&wl->devlist))
3799                 /* Last core on the chip unregistered.
3800                  * We can destroy common struct b43legacy_wl.
3801                  */
3802                 b43legacy_wireless_exit(dev, wl);
3803 }
3804
3805 /* Perform a hardware reset. This can be called from any context. */
3806 void b43legacy_controller_restart(struct b43legacy_wldev *dev,
3807                                   const char *reason)
3808 {
3809         /* Must avoid requeueing, if we are in shutdown. */
3810         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
3811                 return;
3812         b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
3813         queue_work(dev->wl->hw->workqueue, &dev->restart_work);
3814 }
3815
3816 #ifdef CONFIG_PM
3817
3818 static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
3819 {
3820         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3821         struct b43legacy_wl *wl = wldev->wl;
3822
3823         b43legacydbg(wl, "Suspending...\n");
3824
3825         mutex_lock(&wl->mutex);
3826         wldev->suspend_init_status = b43legacy_status(wldev);
3827         if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
3828                 b43legacy_wireless_core_stop(wldev);
3829         if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
3830                 b43legacy_wireless_core_exit(wldev);
3831         mutex_unlock(&wl->mutex);
3832
3833         b43legacydbg(wl, "Device suspended.\n");
3834
3835         return 0;
3836 }
3837
3838 static int b43legacy_resume(struct ssb_device *dev)
3839 {
3840         struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3841         struct b43legacy_wl *wl = wldev->wl;
3842         int err = 0;
3843
3844         b43legacydbg(wl, "Resuming...\n");
3845
3846         mutex_lock(&wl->mutex);
3847         if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
3848                 err = b43legacy_wireless_core_init(wldev);
3849                 if (err) {
3850                         b43legacyerr(wl, "Resume failed at core init\n");
3851                         goto out;
3852                 }
3853         }
3854         if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
3855                 err = b43legacy_wireless_core_start(wldev);
3856                 if (err) {
3857                         b43legacy_wireless_core_exit(wldev);
3858                         b43legacyerr(wl, "Resume failed at core start\n");
3859                         goto out;
3860                 }
3861         }
3862         mutex_unlock(&wl->mutex);
3863
3864         b43legacydbg(wl, "Device resumed.\n");
3865 out:
3866         return err;
3867 }
3868
3869 #else   /* CONFIG_PM */
3870 # define b43legacy_suspend      NULL
3871 # define b43legacy_resume               NULL
3872 #endif  /* CONFIG_PM */
3873
3874 static struct ssb_driver b43legacy_ssb_driver = {
3875         .name           = KBUILD_MODNAME,
3876         .id_table       = b43legacy_ssb_tbl,
3877         .probe          = b43legacy_probe,
3878         .remove         = b43legacy_remove,
3879         .suspend        = b43legacy_suspend,
3880         .resume         = b43legacy_resume,
3881 };
3882
3883 static void b43legacy_print_driverinfo(void)
3884 {
3885         const char *feat_pci = "", *feat_leds = "", *feat_rfkill = "",
3886                    *feat_pio = "", *feat_dma = "";
3887
3888 #ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
3889         feat_pci = "P";
3890 #endif
3891 #ifdef CONFIG_B43LEGACY_LEDS
3892         feat_leds = "L";
3893 #endif
3894 #ifdef CONFIG_B43LEGACY_RFKILL
3895         feat_rfkill = "R";
3896 #endif
3897 #ifdef CONFIG_B43LEGACY_PIO
3898         feat_pio = "I";
3899 #endif
3900 #ifdef CONFIG_B43LEGACY_DMA
3901         feat_dma = "D";
3902 #endif
3903         printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
3904                "[ Features: %s%s%s%s%s, Firmware-ID: "
3905                B43legacy_SUPPORTED_FIRMWARE_ID " ]\n",
3906                feat_pci, feat_leds, feat_rfkill, feat_pio, feat_dma);
3907 }
3908
3909 static int __init b43legacy_init(void)
3910 {
3911         int err;
3912
3913         b43legacy_debugfs_init();
3914
3915         err = ssb_driver_register(&b43legacy_ssb_driver);
3916         if (err)
3917                 goto err_dfs_exit;
3918
3919         b43legacy_print_driverinfo();
3920
3921         return err;
3922
3923 err_dfs_exit:
3924         b43legacy_debugfs_exit();
3925         return err;
3926 }
3927
3928 static void __exit b43legacy_exit(void)
3929 {
3930         ssb_driver_unregister(&b43legacy_ssb_driver);
3931         b43legacy_debugfs_exit();
3932 }
3933
3934 module_init(b43legacy_init)
3935 module_exit(b43legacy_exit)