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b43legacy: Fix error due to MMIO access with SSB unpowered
[linux/fpc-iii.git] / drivers / net / wireless / b43legacy / main.c
blob2609cbe6d6ff8e9fb2b70a5ddb11c63192699abd
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 <m@bues.ch>
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/module.h>
35 #include <linux/if_arp.h>
36 #include <linux/etherdevice.h>
37 #include <linux/firmware.h>
38 #include <linux/workqueue.h>
39 #include <linux/sched.h>
40 #include <linux/skbuff.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/slab.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/ucode2.fw");
64 MODULE_FIRMWARE("b43legacy/ucode4.fw");
65
66 #if defined(CONFIG_B43LEGACY_DMA) && defined(CONFIG_B43LEGACY_PIO)
67 static int modparam_pio;
68 module_param_named(pio, modparam_pio, int, 0444);
69 MODULE_PARM_DESC(pio, "enable(1) / disable(0) PIO mode");
70 #elif defined(CONFIG_B43LEGACY_DMA)
71 # define modparam_pio 0
72 #elif defined(CONFIG_B43LEGACY_PIO)
73 # define modparam_pio 1
74 #endif
75
76 static int modparam_bad_frames_preempt;
77 module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444);
78 MODULE_PARM_DESC(bad_frames_preempt, "enable(1) / disable(0) Bad Frames"
79 " Preemption");
80
81 static char modparam_fwpostfix[16];
82 module_param_string(fwpostfix, modparam_fwpostfix, 16, 0444);
83 MODULE_PARM_DESC(fwpostfix, "Postfix for the firmware files to load.");
84
85 /* The following table supports BCM4301, BCM4303 and BCM4306/2 devices. */
86 static const struct ssb_device_id b43legacy_ssb_tbl[] = {
87 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 2),
88 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 4),
89 SSB_DEVTABLE_END
90 };
91 MODULE_DEVICE_TABLE(ssb, b43legacy_ssb_tbl);
92
93
94 /* Channel and ratetables are shared for all devices.
95 * They can't be const, because ieee80211 puts some precalculated
96 * data in there. This data is the same for all devices, so we don't
97 * get concurrency issues */
98 #define RATETAB_ENT(_rateid, _flags) \
99 { \
100 .bitrate = B43legacy_RATE_TO_100KBPS(_rateid), \
101 .hw_value = (_rateid), \
102 .flags = (_flags), \
103 }
104 /*
105 * NOTE: When changing this, sync with xmit.c's
106 * b43legacy_plcp_get_bitrate_idx_* functions!
107 */
108 static struct ieee80211_rate __b43legacy_ratetable[] = {
109 RATETAB_ENT(B43legacy_CCK_RATE_1MB, 0),
110 RATETAB_ENT(B43legacy_CCK_RATE_2MB, IEEE80211_RATE_SHORT_PREAMBLE),
111 RATETAB_ENT(B43legacy_CCK_RATE_5MB, IEEE80211_RATE_SHORT_PREAMBLE),
112 RATETAB_ENT(B43legacy_CCK_RATE_11MB, IEEE80211_RATE_SHORT_PREAMBLE),
113 RATETAB_ENT(B43legacy_OFDM_RATE_6MB, 0),
114 RATETAB_ENT(B43legacy_OFDM_RATE_9MB, 0),
115 RATETAB_ENT(B43legacy_OFDM_RATE_12MB, 0),
116 RATETAB_ENT(B43legacy_OFDM_RATE_18MB, 0),
117 RATETAB_ENT(B43legacy_OFDM_RATE_24MB, 0),
118 RATETAB_ENT(B43legacy_OFDM_RATE_36MB, 0),
119 RATETAB_ENT(B43legacy_OFDM_RATE_48MB, 0),
120 RATETAB_ENT(B43legacy_OFDM_RATE_54MB, 0),
121 };
122 #define b43legacy_b_ratetable (__b43legacy_ratetable + 0)
123 #define b43legacy_b_ratetable_size 4
124 #define b43legacy_g_ratetable (__b43legacy_ratetable + 0)
125 #define b43legacy_g_ratetable_size 12
126
127 #define CHANTAB_ENT(_chanid, _freq) \
128 { \
129 .center_freq = (_freq), \
130 .hw_value = (_chanid), \
131 }
132 static struct ieee80211_channel b43legacy_bg_chantable[] = {
133 CHANTAB_ENT(1, 2412),
134 CHANTAB_ENT(2, 2417),
135 CHANTAB_ENT(3, 2422),
136 CHANTAB_ENT(4, 2427),
137 CHANTAB_ENT(5, 2432),
138 CHANTAB_ENT(6, 2437),
139 CHANTAB_ENT(7, 2442),
140 CHANTAB_ENT(8, 2447),
141 CHANTAB_ENT(9, 2452),
142 CHANTAB_ENT(10, 2457),
143 CHANTAB_ENT(11, 2462),
144 CHANTAB_ENT(12, 2467),
145 CHANTAB_ENT(13, 2472),
146 CHANTAB_ENT(14, 2484),
147 };
148
149 static struct ieee80211_supported_band b43legacy_band_2GHz_BPHY = {
150 .channels = b43legacy_bg_chantable,
151 .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
152 .bitrates = b43legacy_b_ratetable,
153 .n_bitrates = b43legacy_b_ratetable_size,
154 };
155
156 static struct ieee80211_supported_band b43legacy_band_2GHz_GPHY = {
157 .channels = b43legacy_bg_chantable,
158 .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
159 .bitrates = b43legacy_g_ratetable,
160 .n_bitrates = b43legacy_g_ratetable_size,
161 };
162
163 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev);
164 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev);
165 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev);
166 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev);
167
168
169 static int b43legacy_ratelimit(struct b43legacy_wl *wl)
170 {
171 if (!wl || !wl->current_dev)
172 return 1;
173 if (b43legacy_status(wl->current_dev) < B43legacy_STAT_STARTED)
174 return 1;
175 /* We are up and running.
176 * Ratelimit the messages to avoid DoS over the net. */
177 return net_ratelimit();
178 }
179
180 void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
181 {
182 struct va_format vaf;
183 va_list args;
184
185 if (!b43legacy_ratelimit(wl))
186 return;
187
188 va_start(args, fmt);
189
190 vaf.fmt = fmt;
191 vaf.va = &args;
192
193 printk(KERN_INFO "b43legacy-%s: %pV",
194 (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
195
196 va_end(args);
197 }
198
199 void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
200 {
201 struct va_format vaf;
202 va_list args;
203
204 if (!b43legacy_ratelimit(wl))
205 return;
206
207 va_start(args, fmt);
208
209 vaf.fmt = fmt;
210 vaf.va = &args;
211
212 printk(KERN_ERR "b43legacy-%s ERROR: %pV",
213 (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
214
215 va_end(args);
216 }
217
218 void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
219 {
220 struct va_format vaf;
221 va_list args;
222
223 if (!b43legacy_ratelimit(wl))
224 return;
225
226 va_start(args, fmt);
227
228 vaf.fmt = fmt;
229 vaf.va = &args;
230
231 printk(KERN_WARNING "b43legacy-%s warning: %pV",
232 (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
233
234 va_end(args);
235 }
236
237 #if B43legacy_DEBUG
238 void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
239 {
240 struct va_format vaf;
241 va_list args;
242
243 va_start(args, fmt);
244
245 vaf.fmt = fmt;
246 vaf.va = &args;
247
248 printk(KERN_DEBUG "b43legacy-%s debug: %pV",
249 (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
250
251 va_end(args);
252 }
253 #endif /* DEBUG */
254
255 static void b43legacy_ram_write(struct b43legacy_wldev *dev, u16 offset,
256 u32 val)
257 {
258 u32 status;
259
260 B43legacy_WARN_ON(offset % 4 != 0);
261
262 status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
263 if (status & B43legacy_MACCTL_BE)
264 val = swab32(val);
265
266 b43legacy_write32(dev, B43legacy_MMIO_RAM_CONTROL, offset);
267 mmiowb();
268 b43legacy_write32(dev, B43legacy_MMIO_RAM_DATA, val);
269 }
270
271 static inline
272 void b43legacy_shm_control_word(struct b43legacy_wldev *dev,
273 u16 routing, u16 offset)
274 {
275 u32 control;
276
277 /* "offset" is the WORD offset. */
278
279 control = routing;
280 control <<= 16;
281 control |= offset;
282 b43legacy_write32(dev, B43legacy_MMIO_SHM_CONTROL, control);
283 }
284
285 u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
286 u16 routing, u16 offset)
287 {
288 u32 ret;
289
290 if (routing == B43legacy_SHM_SHARED) {
291 B43legacy_WARN_ON((offset & 0x0001) != 0);
292 if (offset & 0x0003) {
293 /* Unaligned access */
294 b43legacy_shm_control_word(dev, routing, offset >> 2);
295 ret = b43legacy_read16(dev,
296 B43legacy_MMIO_SHM_DATA_UNALIGNED);
297 ret <<= 16;
298 b43legacy_shm_control_word(dev, routing,
299 (offset >> 2) + 1);
300 ret |= b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
301
302 return ret;
303 }
304 offset >>= 2;
305 }
306 b43legacy_shm_control_word(dev, routing, offset);
307 ret = b43legacy_read32(dev, B43legacy_MMIO_SHM_DATA);
308
309 return ret;
310 }
311
312 u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
313 u16 routing, u16 offset)
314 {
315 u16 ret;
316
317 if (routing == B43legacy_SHM_SHARED) {
318 B43legacy_WARN_ON((offset & 0x0001) != 0);
319 if (offset & 0x0003) {
320 /* Unaligned access */
321 b43legacy_shm_control_word(dev, routing, offset >> 2);
322 ret = b43legacy_read16(dev,
323 B43legacy_MMIO_SHM_DATA_UNALIGNED);
324
325 return ret;
326 }
327 offset >>= 2;
328 }
329 b43legacy_shm_control_word(dev, routing, offset);
330 ret = b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
331
332 return ret;
333 }
334
335 void b43legacy_shm_write32(struct b43legacy_wldev *dev,
336 u16 routing, u16 offset,
337 u32 value)
338 {
339 if (routing == B43legacy_SHM_SHARED) {
340 B43legacy_WARN_ON((offset & 0x0001) != 0);
341 if (offset & 0x0003) {
342 /* Unaligned access */
343 b43legacy_shm_control_word(dev, routing, offset >> 2);
344 mmiowb();
345 b43legacy_write16(dev,
346 B43legacy_MMIO_SHM_DATA_UNALIGNED,
347 (value >> 16) & 0xffff);
348 mmiowb();
349 b43legacy_shm_control_word(dev, routing,
350 (offset >> 2) + 1);
351 mmiowb();
352 b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA,
353 value & 0xffff);
354 return;
355 }
356 offset >>= 2;
357 }
358 b43legacy_shm_control_word(dev, routing, offset);
359 mmiowb();
360 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, value);
361 }
362
363 void b43legacy_shm_write16(struct b43legacy_wldev *dev, u16 routing, u16 offset,
364 u16 value)
365 {
366 if (routing == B43legacy_SHM_SHARED) {
367 B43legacy_WARN_ON((offset & 0x0001) != 0);
368 if (offset & 0x0003) {
369 /* Unaligned access */
370 b43legacy_shm_control_word(dev, routing, offset >> 2);
371 mmiowb();
372 b43legacy_write16(dev,
373 B43legacy_MMIO_SHM_DATA_UNALIGNED,
374 value);
375 return;
376 }
377 offset >>= 2;
378 }
379 b43legacy_shm_control_word(dev, routing, offset);
380 mmiowb();
381 b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA, value);
382 }
383
384 /* Read HostFlags */
385 u32 b43legacy_hf_read(struct b43legacy_wldev *dev)
386 {
387 u32 ret;
388
389 ret = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
390 B43legacy_SHM_SH_HOSTFHI);
391 ret <<= 16;
392 ret |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
393 B43legacy_SHM_SH_HOSTFLO);
394
395 return ret;
396 }
397
398 /* Write HostFlags */
399 void b43legacy_hf_write(struct b43legacy_wldev *dev, u32 value)
400 {
401 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
402 B43legacy_SHM_SH_HOSTFLO,
403 (value & 0x0000FFFF));
404 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
405 B43legacy_SHM_SH_HOSTFHI,
406 ((value & 0xFFFF0000) >> 16));
407 }
408
409 void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf)
410 {
411 /* We need to be careful. As we read the TSF from multiple
412 * registers, we should take care of register overflows.
413 * In theory, the whole tsf read process should be atomic.
414 * We try to be atomic here, by restaring the read process,
415 * if any of the high registers changed (overflew).
416 */
417 if (dev->dev->id.revision >= 3) {
418 u32 low;
419 u32 high;
420 u32 high2;
421
422 do {
423 high = b43legacy_read32(dev,
424 B43legacy_MMIO_REV3PLUS_TSF_HIGH);
425 low = b43legacy_read32(dev,
426 B43legacy_MMIO_REV3PLUS_TSF_LOW);
427 high2 = b43legacy_read32(dev,
428 B43legacy_MMIO_REV3PLUS_TSF_HIGH);
429 } while (unlikely(high != high2));
430
431 *tsf = high;
432 *tsf <<= 32;
433 *tsf |= low;
434 } else {
435 u64 tmp;
436 u16 v0;
437 u16 v1;
438 u16 v2;
439 u16 v3;
440 u16 test1;
441 u16 test2;
442 u16 test3;
443
444 do {
445 v3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
446 v2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
447 v1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
448 v0 = b43legacy_read16(dev, B43legacy_MMIO_TSF_0);
449
450 test3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
451 test2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
452 test1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
453 } while (v3 != test3 || v2 != test2 || v1 != test1);
454
455 *tsf = v3;
456 *tsf <<= 48;
457 tmp = v2;
458 tmp <<= 32;
459 *tsf |= tmp;
460 tmp = v1;
461 tmp <<= 16;
462 *tsf |= tmp;
463 *tsf |= v0;
464 }
465 }
466
467 static void b43legacy_time_lock(struct b43legacy_wldev *dev)
468 {
469 u32 status;
470
471 status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
472 status |= B43legacy_MACCTL_TBTTHOLD;
473 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
474 mmiowb();
475 }
476
477 static void b43legacy_time_unlock(struct b43legacy_wldev *dev)
478 {
479 u32 status;
480
481 status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
482 status &= ~B43legacy_MACCTL_TBTTHOLD;
483 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
484 }
485
486 static void b43legacy_tsf_write_locked(struct b43legacy_wldev *dev, u64 tsf)
487 {
488 /* Be careful with the in-progress timer.
489 * First zero out the low register, so we have a full
490 * register-overflow duration to complete the operation.
491 */
492 if (dev->dev->id.revision >= 3) {
493 u32 lo = (tsf & 0x00000000FFFFFFFFULL);
494 u32 hi = (tsf & 0xFFFFFFFF00000000ULL) >> 32;
495
496 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW, 0);
497 mmiowb();
498 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_HIGH,
499 hi);
500 mmiowb();
501 b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW,
502 lo);
503 } else {
504 u16 v0 = (tsf & 0x000000000000FFFFULL);
505 u16 v1 = (tsf & 0x00000000FFFF0000ULL) >> 16;
506 u16 v2 = (tsf & 0x0000FFFF00000000ULL) >> 32;
507 u16 v3 = (tsf & 0xFFFF000000000000ULL) >> 48;
508
509 b43legacy_write16(dev, B43legacy_MMIO_TSF_0, 0);
510 mmiowb();
511 b43legacy_write16(dev, B43legacy_MMIO_TSF_3, v3);
512 mmiowb();
513 b43legacy_write16(dev, B43legacy_MMIO_TSF_2, v2);
514 mmiowb();
515 b43legacy_write16(dev, B43legacy_MMIO_TSF_1, v1);
516 mmiowb();
517 b43legacy_write16(dev, B43legacy_MMIO_TSF_0, v0);
518 }
519 }
520
521 void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf)
522 {
523 b43legacy_time_lock(dev);
524 b43legacy_tsf_write_locked(dev, tsf);
525 b43legacy_time_unlock(dev);
526 }
527
528 static
529 void b43legacy_macfilter_set(struct b43legacy_wldev *dev,
530 u16 offset, const u8 *mac)
531 {
532 static const u8 zero_addr[ETH_ALEN] = { 0 };
533 u16 data;
534
535 if (!mac)
536 mac = zero_addr;
537
538 offset |= 0x0020;
539 b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_CONTROL, offset);
540
541 data = mac[0];
542 data |= mac[1] << 8;
543 b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
544 data = mac[2];
545 data |= mac[3] << 8;
546 b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
547 data = mac[4];
548 data |= mac[5] << 8;
549 b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
550 }
551
552 static void b43legacy_write_mac_bssid_templates(struct b43legacy_wldev *dev)
553 {
554 static const u8 zero_addr[ETH_ALEN] = { 0 };
555 const u8 *mac = dev->wl->mac_addr;
556 const u8 *bssid = dev->wl->bssid;
557 u8 mac_bssid[ETH_ALEN * 2];
558 int i;
559 u32 tmp;
560
561 if (!bssid)
562 bssid = zero_addr;
563 if (!mac)
564 mac = zero_addr;
565
566 b43legacy_macfilter_set(dev, B43legacy_MACFILTER_BSSID, bssid);
567
568 memcpy(mac_bssid, mac, ETH_ALEN);
569 memcpy(mac_bssid + ETH_ALEN, bssid, ETH_ALEN);
570
571 /* Write our MAC address and BSSID to template ram */
572 for (i = 0; i < ARRAY_SIZE(mac_bssid); i += sizeof(u32)) {
573 tmp = (u32)(mac_bssid[i + 0]);
574 tmp |= (u32)(mac_bssid[i + 1]) << 8;
575 tmp |= (u32)(mac_bssid[i + 2]) << 16;
576 tmp |= (u32)(mac_bssid[i + 3]) << 24;
577 b43legacy_ram_write(dev, 0x20 + i, tmp);
578 b43legacy_ram_write(dev, 0x78 + i, tmp);
579 b43legacy_ram_write(dev, 0x478 + i, tmp);
580 }
581 }
582
583 static void b43legacy_upload_card_macaddress(struct b43legacy_wldev *dev)
584 {
585 b43legacy_write_mac_bssid_templates(dev);
586 b43legacy_macfilter_set(dev, B43legacy_MACFILTER_SELF,
587 dev->wl->mac_addr);
588 }
589
590 static void b43legacy_set_slot_time(struct b43legacy_wldev *dev,
591 u16 slot_time)
592 {
593 /* slot_time is in usec. */
594 if (dev->phy.type != B43legacy_PHYTYPE_G)
595 return;
596 b43legacy_write16(dev, 0x684, 510 + slot_time);
597 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0010,
598 slot_time);
599 }
600
601 static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
602 {
603 b43legacy_set_slot_time(dev, 9);
604 }
605
606 static void b43legacy_short_slot_timing_disable(struct b43legacy_wldev *dev)
607 {
608 b43legacy_set_slot_time(dev, 20);
609 }
610
611 /* Synchronize IRQ top- and bottom-half.
612 * IRQs must be masked before calling this.
613 * This must not be called with the irq_lock held.
614 */
615 static void b43legacy_synchronize_irq(struct b43legacy_wldev *dev)
616 {
617 synchronize_irq(dev->dev->irq);
618 tasklet_kill(&dev->isr_tasklet);
619 }
620
621 /* DummyTransmission function, as documented on
622 * http://bcm-specs.sipsolutions.net/DummyTransmission
623 */
624 void b43legacy_dummy_transmission(struct b43legacy_wldev *dev)
625 {
626 struct b43legacy_phy *phy = &dev->phy;
627 unsigned int i;
628 unsigned int max_loop;
629 u16 value;
630 u32 buffer[5] = {
631 0x00000000,
632 0x00D40000,
633 0x00000000,
634 0x01000000,
635 0x00000000,
636 };
637
638 switch (phy->type) {
639 case B43legacy_PHYTYPE_B:
640 case B43legacy_PHYTYPE_G:
641 max_loop = 0xFA;
642 buffer[0] = 0x000B846E;
643 break;
644 default:
645 B43legacy_BUG_ON(1);
646 return;
647 }
648
649 for (i = 0; i < 5; i++)
650 b43legacy_ram_write(dev, i * 4, buffer[i]);
651
652 /* dummy read follows */
653 b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
654
655 b43legacy_write16(dev, 0x0568, 0x0000);
656 b43legacy_write16(dev, 0x07C0, 0x0000);
657 b43legacy_write16(dev, 0x050C, 0x0000);
658 b43legacy_write16(dev, 0x0508, 0x0000);
659 b43legacy_write16(dev, 0x050A, 0x0000);
660 b43legacy_write16(dev, 0x054C, 0x0000);
661 b43legacy_write16(dev, 0x056A, 0x0014);
662 b43legacy_write16(dev, 0x0568, 0x0826);
663 b43legacy_write16(dev, 0x0500, 0x0000);
664 b43legacy_write16(dev, 0x0502, 0x0030);
665
666 if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
667 b43legacy_radio_write16(dev, 0x0051, 0x0017);
668 for (i = 0x00; i < max_loop; i++) {
669 value = b43legacy_read16(dev, 0x050E);
670 if (value & 0x0080)
671 break;
672 udelay(10);
673 }
674 for (i = 0x00; i < 0x0A; i++) {
675 value = b43legacy_read16(dev, 0x050E);
676 if (value & 0x0400)
677 break;
678 udelay(10);
679 }
680 for (i = 0x00; i < 0x0A; i++) {
681 value = b43legacy_read16(dev, 0x0690);
682 if (!(value & 0x0100))
683 break;
684 udelay(10);
685 }
686 if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
687 b43legacy_radio_write16(dev, 0x0051, 0x0037);
688 }
689
690 /* Turn the Analog ON/OFF */
691 static void b43legacy_switch_analog(struct b43legacy_wldev *dev, int on)
692 {
693 b43legacy_write16(dev, B43legacy_MMIO_PHY0, on ? 0 : 0xF4);
694 }
695
696 void b43legacy_wireless_core_reset(struct b43legacy_wldev *dev, u32 flags)
697 {
698 u32 tmslow;
699 u32 macctl;
700
701 flags |= B43legacy_TMSLOW_PHYCLKEN;
702 flags |= B43legacy_TMSLOW_PHYRESET;
703 ssb_device_enable(dev->dev, flags);
704 msleep(2); /* Wait for the PLL to turn on. */
705
706 /* Now take the PHY out of Reset again */
707 tmslow = ssb_read32(dev->dev, SSB_TMSLOW);
708 tmslow |= SSB_TMSLOW_FGC;
709 tmslow &= ~B43legacy_TMSLOW_PHYRESET;
710 ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
711 ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
712 msleep(1);
713 tmslow &= ~SSB_TMSLOW_FGC;
714 ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
715 ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
716 msleep(1);
717
718 /* Turn Analog ON */
719 b43legacy_switch_analog(dev, 1);
720
721 macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
722 macctl &= ~B43legacy_MACCTL_GMODE;
723 if (flags & B43legacy_TMSLOW_GMODE) {
724 macctl |= B43legacy_MACCTL_GMODE;
725 dev->phy.gmode = true;
726 } else
727 dev->phy.gmode = false;
728 macctl |= B43legacy_MACCTL_IHR_ENABLED;
729 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
730 }
731
732 static void handle_irq_transmit_status(struct b43legacy_wldev *dev)
733 {
734 u32 v0;
735 u32 v1;
736 u16 tmp;
737 struct b43legacy_txstatus stat;
738
739 while (1) {
740 v0 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
741 if (!(v0 & 0x00000001))
742 break;
743 v1 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
744
745 stat.cookie = (v0 >> 16);
746 stat.seq = (v1 & 0x0000FFFF);
747 stat.phy_stat = ((v1 & 0x00FF0000) >> 16);
748 tmp = (v0 & 0x0000FFFF);
749 stat.frame_count = ((tmp & 0xF000) >> 12);
750 stat.rts_count = ((tmp & 0x0F00) >> 8);
751 stat.supp_reason = ((tmp & 0x001C) >> 2);
752 stat.pm_indicated = !!(tmp & 0x0080);
753 stat.intermediate = !!(tmp & 0x0040);
754 stat.for_ampdu = !!(tmp & 0x0020);
755 stat.acked = !!(tmp & 0x0002);
756
757 b43legacy_handle_txstatus(dev, &stat);
758 }
759 }
760
761 static void drain_txstatus_queue(struct b43legacy_wldev *dev)
762 {
763 u32 dummy;
764
765 if (dev->dev->id.revision < 5)
766 return;
767 /* Read all entries from the microcode TXstatus FIFO
768 * and throw them away.
769 */
770 while (1) {
771 dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
772 if (!(dummy & 0x00000001))
773 break;
774 dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
775 }
776 }
777
778 static u32 b43legacy_jssi_read(struct b43legacy_wldev *dev)
779 {
780 u32 val = 0;
781
782 val = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x40A);
783 val <<= 16;
784 val |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x408);
785
786 return val;
787 }
788
789 static void b43legacy_jssi_write(struct b43legacy_wldev *dev, u32 jssi)
790 {
791 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x408,
792 (jssi & 0x0000FFFF));
793 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x40A,
794 (jssi & 0xFFFF0000) >> 16);
795 }
796
797 static void b43legacy_generate_noise_sample(struct b43legacy_wldev *dev)
798 {
799 b43legacy_jssi_write(dev, 0x7F7F7F7F);
800 b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
801 b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
802 | B43legacy_MACCMD_BGNOISE);
803 B43legacy_WARN_ON(dev->noisecalc.channel_at_start !=
804 dev->phy.channel);
805 }
806
807 static void b43legacy_calculate_link_quality(struct b43legacy_wldev *dev)
808 {
809 /* Top half of Link Quality calculation. */
810
811 if (dev->noisecalc.calculation_running)
812 return;
813 dev->noisecalc.channel_at_start = dev->phy.channel;
814 dev->noisecalc.calculation_running = true;
815 dev->noisecalc.nr_samples = 0;
816
817 b43legacy_generate_noise_sample(dev);
818 }
819
820 static void handle_irq_noise(struct b43legacy_wldev *dev)
821 {
822 struct b43legacy_phy *phy = &dev->phy;
823 u16 tmp;
824 u8 noise[4];
825 u8 i;
826 u8 j;
827 s32 average;
828
829 /* Bottom half of Link Quality calculation. */
830
831 B43legacy_WARN_ON(!dev->noisecalc.calculation_running);
832 if (dev->noisecalc.channel_at_start != phy->channel)
833 goto drop_calculation;
834 *((__le32 *)noise) = cpu_to_le32(b43legacy_jssi_read(dev));
835 if (noise[0] == 0x7F || noise[1] == 0x7F ||
836 noise[2] == 0x7F || noise[3] == 0x7F)
837 goto generate_new;
838
839 /* Get the noise samples. */
840 B43legacy_WARN_ON(dev->noisecalc.nr_samples >= 8);
841 i = dev->noisecalc.nr_samples;
842 noise[0] = clamp_val(noise[0], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
843 noise[1] = clamp_val(noise[1], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
844 noise[2] = clamp_val(noise[2], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
845 noise[3] = clamp_val(noise[3], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
846 dev->noisecalc.samples[i][0] = phy->nrssi_lt[noise[0]];
847 dev->noisecalc.samples[i][1] = phy->nrssi_lt[noise[1]];
848 dev->noisecalc.samples[i][2] = phy->nrssi_lt[noise[2]];
849 dev->noisecalc.samples[i][3] = phy->nrssi_lt[noise[3]];
850 dev->noisecalc.nr_samples++;
851 if (dev->noisecalc.nr_samples == 8) {
852 /* Calculate the Link Quality by the noise samples. */
853 average = 0;
854 for (i = 0; i < 8; i++) {
855 for (j = 0; j < 4; j++)
856 average += dev->noisecalc.samples[i][j];
857 }
858 average /= (8 * 4);
859 average *= 125;
860 average += 64;
861 average /= 128;
862 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
863 0x40C);
864 tmp = (tmp / 128) & 0x1F;
865 if (tmp >= 8)
866 average += 2;
867 else
868 average -= 25;
869 if (tmp == 8)
870 average -= 72;
871 else
872 average -= 48;
873
874 dev->stats.link_noise = average;
875 drop_calculation:
876 dev->noisecalc.calculation_running = false;
877 return;
878 }
879 generate_new:
880 b43legacy_generate_noise_sample(dev);
881 }
882
883 static void handle_irq_tbtt_indication(struct b43legacy_wldev *dev)
884 {
885 if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP)) {
886 /* TODO: PS TBTT */
887 } else {
888 if (1/*FIXME: the last PSpoll frame was sent successfully */)
889 b43legacy_power_saving_ctl_bits(dev, -1, -1);
890 }
891 if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
892 dev->dfq_valid = true;
893 }
894
895 static void handle_irq_atim_end(struct b43legacy_wldev *dev)
896 {
897 if (dev->dfq_valid) {
898 b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
899 b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
900 | B43legacy_MACCMD_DFQ_VALID);
901 dev->dfq_valid = false;
902 }
903 }
904
905 static void handle_irq_pmq(struct b43legacy_wldev *dev)
906 {
907 u32 tmp;
908
909 /* TODO: AP mode. */
910
911 while (1) {
912 tmp = b43legacy_read32(dev, B43legacy_MMIO_PS_STATUS);
913 if (!(tmp & 0x00000008))
914 break;
915 }
916 /* 16bit write is odd, but correct. */
917 b43legacy_write16(dev, B43legacy_MMIO_PS_STATUS, 0x0002);
918 }
919
920 static void b43legacy_write_template_common(struct b43legacy_wldev *dev,
921 const u8 *data, u16 size,
922 u16 ram_offset,
923 u16 shm_size_offset, u8 rate)
924 {
925 u32 i;
926 u32 tmp;
927 struct b43legacy_plcp_hdr4 plcp;
928
929 plcp.data = 0;
930 b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate);
931 b43legacy_ram_write(dev, ram_offset, le32_to_cpu(plcp.data));
932 ram_offset += sizeof(u32);
933 /* The PLCP is 6 bytes long, but we only wrote 4 bytes, yet.
934 * So leave the first two bytes of the next write blank.
935 */
936 tmp = (u32)(data[0]) << 16;
937 tmp |= (u32)(data[1]) << 24;
938 b43legacy_ram_write(dev, ram_offset, tmp);
939 ram_offset += sizeof(u32);
940 for (i = 2; i < size; i += sizeof(u32)) {
941 tmp = (u32)(data[i + 0]);
942 if (i + 1 < size)
943 tmp |= (u32)(data[i + 1]) << 8;
944 if (i + 2 < size)
945 tmp |= (u32)(data[i + 2]) << 16;
946 if (i + 3 < size)
947 tmp |= (u32)(data[i + 3]) << 24;
948 b43legacy_ram_write(dev, ram_offset + i - 2, tmp);
949 }
950 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_size_offset,
951 size + sizeof(struct b43legacy_plcp_hdr6));
952 }
953
954 /* Convert a b43legacy antenna number value to the PHY TX control value. */
955 static u16 b43legacy_antenna_to_phyctl(int antenna)
956 {
957 switch (antenna) {
958 case B43legacy_ANTENNA0:
959 return B43legacy_TX4_PHY_ANT0;
960 case B43legacy_ANTENNA1:
961 return B43legacy_TX4_PHY_ANT1;
962 }
963 return B43legacy_TX4_PHY_ANTLAST;
964 }
965
966 static void b43legacy_write_beacon_template(struct b43legacy_wldev *dev,
967 u16 ram_offset,
968 u16 shm_size_offset)
969 {
970
971 unsigned int i, len, variable_len;
972 const struct ieee80211_mgmt *bcn;
973 const u8 *ie;
974 bool tim_found = false;
975 unsigned int rate;
976 u16 ctl;
977 int antenna;
978 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(dev->wl->current_beacon);
979
980 bcn = (const struct ieee80211_mgmt *)(dev->wl->current_beacon->data);
981 len = min((size_t)dev->wl->current_beacon->len,
982 0x200 - sizeof(struct b43legacy_plcp_hdr6));
983 rate = ieee80211_get_tx_rate(dev->wl->hw, info)->hw_value;
984
985 b43legacy_write_template_common(dev, (const u8 *)bcn, len, ram_offset,
986 shm_size_offset, rate);
987
988 /* Write the PHY TX control parameters. */
989 antenna = B43legacy_ANTENNA_DEFAULT;
990 antenna = b43legacy_antenna_to_phyctl(antenna);
991 ctl = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
992 B43legacy_SHM_SH_BEACPHYCTL);
993 /* We can't send beacons with short preamble. Would get PHY errors. */
994 ctl &= ~B43legacy_TX4_PHY_SHORTPRMBL;
995 ctl &= ~B43legacy_TX4_PHY_ANT;
996 ctl &= ~B43legacy_TX4_PHY_ENC;
997 ctl |= antenna;
998 ctl |= B43legacy_TX4_PHY_ENC_CCK;
999 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1000 B43legacy_SHM_SH_BEACPHYCTL, ctl);
1001
1002 /* Find the position of the TIM and the DTIM_period value
1003 * and write them to SHM. */
1004 ie = bcn->u.beacon.variable;
1005 variable_len = len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
1006 for (i = 0; i < variable_len - 2; ) {
1007 uint8_t ie_id, ie_len;
1008
1009 ie_id = ie[i];
1010 ie_len = ie[i + 1];
1011 if (ie_id == 5) {
1012 u16 tim_position;
1013 u16 dtim_period;
1014 /* This is the TIM Information Element */
1015
1016 /* Check whether the ie_len is in the beacon data range. */
1017 if (variable_len < ie_len + 2 + i)
1018 break;
1019 /* A valid TIM is at least 4 bytes long. */
1020 if (ie_len < 4)
1021 break;
1022 tim_found = true;
1023
1024 tim_position = sizeof(struct b43legacy_plcp_hdr6);
1025 tim_position += offsetof(struct ieee80211_mgmt,
1026 u.beacon.variable);
1027 tim_position += i;
1028
1029 dtim_period = ie[i + 3];
1030
1031 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1032 B43legacy_SHM_SH_TIMPOS, tim_position);
1033 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1034 B43legacy_SHM_SH_DTIMP, dtim_period);
1035 break;
1036 }
1037 i += ie_len + 2;
1038 }
1039 if (!tim_found) {
1040 b43legacywarn(dev->wl, "Did not find a valid TIM IE in the "
1041 "beacon template packet. AP or IBSS operation "
1042 "may be broken.\n");
1043 } else
1044 b43legacydbg(dev->wl, "Updated beacon template\n");
1045 }
1046
1047 static void b43legacy_write_probe_resp_plcp(struct b43legacy_wldev *dev,
1048 u16 shm_offset, u16 size,
1049 struct ieee80211_rate *rate)
1050 {
1051 struct b43legacy_plcp_hdr4 plcp;
1052 u32 tmp;
1053 __le16 dur;
1054
1055 plcp.data = 0;
1056 b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate->hw_value);
1057 dur = ieee80211_generic_frame_duration(dev->wl->hw,
1058 dev->wl->vif,
1059 size,
1060 rate);
1061 /* Write PLCP in two parts and timing for packet transfer */
1062 tmp = le32_to_cpu(plcp.data);
1063 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset,
1064 tmp & 0xFFFF);
1065 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 2,
1066 tmp >> 16);
1067 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 6,
1068 le16_to_cpu(dur));
1069 }
1070
1071 /* Instead of using custom probe response template, this function
1072 * just patches custom beacon template by:
1073 * 1) Changing packet type
1074 * 2) Patching duration field
1075 * 3) Stripping TIM
1076 */
1077 static const u8 *b43legacy_generate_probe_resp(struct b43legacy_wldev *dev,
1078 u16 *dest_size,
1079 struct ieee80211_rate *rate)
1080 {
1081 const u8 *src_data;
1082 u8 *dest_data;
1083 u16 src_size, elem_size, src_pos, dest_pos;
1084 __le16 dur;
1085 struct ieee80211_hdr *hdr;
1086 size_t ie_start;
1087
1088 src_size = dev->wl->current_beacon->len;
1089 src_data = (const u8 *)dev->wl->current_beacon->data;
1090
1091 /* Get the start offset of the variable IEs in the packet. */
1092 ie_start = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1093 B43legacy_WARN_ON(ie_start != offsetof(struct ieee80211_mgmt,
1094 u.beacon.variable));
1095
1096 if (B43legacy_WARN_ON(src_size < ie_start))
1097 return NULL;
1098
1099 dest_data = kmalloc(src_size, GFP_ATOMIC);
1100 if (unlikely(!dest_data))
1101 return NULL;
1102
1103 /* Copy the static data and all Information Elements, except the TIM. */
1104 memcpy(dest_data, src_data, ie_start);
1105 src_pos = ie_start;
1106 dest_pos = ie_start;
1107 for ( ; src_pos < src_size - 2; src_pos += elem_size) {
1108 elem_size = src_data[src_pos + 1] + 2;
1109 if (src_data[src_pos] == 5) {
1110 /* This is the TIM. */
1111 continue;
1112 }
1113 memcpy(dest_data + dest_pos, src_data + src_pos, elem_size);
1114 dest_pos += elem_size;
1115 }
1116 *dest_size = dest_pos;
1117 hdr = (struct ieee80211_hdr *)dest_data;
1118
1119 /* Set the frame control. */
1120 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1121 IEEE80211_STYPE_PROBE_RESP);
1122 dur = ieee80211_generic_frame_duration(dev->wl->hw,
1123 dev->wl->vif,
1124 *dest_size,
1125 rate);
1126 hdr->duration_id = dur;
1127
1128 return dest_data;
1129 }
1130
1131 static void b43legacy_write_probe_resp_template(struct b43legacy_wldev *dev,
1132 u16 ram_offset,
1133 u16 shm_size_offset,
1134 struct ieee80211_rate *rate)
1135 {
1136 const u8 *probe_resp_data;
1137 u16 size;
1138
1139 size = dev->wl->current_beacon->len;
1140 probe_resp_data = b43legacy_generate_probe_resp(dev, &size, rate);
1141 if (unlikely(!probe_resp_data))
1142 return;
1143
1144 /* Looks like PLCP headers plus packet timings are stored for
1145 * all possible basic rates
1146 */
1147 b43legacy_write_probe_resp_plcp(dev, 0x31A, size,
1148 &b43legacy_b_ratetable[0]);
1149 b43legacy_write_probe_resp_plcp(dev, 0x32C, size,
1150 &b43legacy_b_ratetable[1]);
1151 b43legacy_write_probe_resp_plcp(dev, 0x33E, size,
1152 &b43legacy_b_ratetable[2]);
1153 b43legacy_write_probe_resp_plcp(dev, 0x350, size,
1154 &b43legacy_b_ratetable[3]);
1155
1156 size = min((size_t)size,
1157 0x200 - sizeof(struct b43legacy_plcp_hdr6));
1158 b43legacy_write_template_common(dev, probe_resp_data,
1159 size, ram_offset,
1160 shm_size_offset, rate->hw_value);
1161 kfree(probe_resp_data);
1162 }
1163
1164 static void b43legacy_upload_beacon0(struct b43legacy_wldev *dev)
1165 {
1166 struct b43legacy_wl *wl = dev->wl;
1167
1168 if (wl->beacon0_uploaded)
1169 return;
1170 b43legacy_write_beacon_template(dev, 0x68, 0x18);
1171 /* FIXME: Probe resp upload doesn't really belong here,
1172 * but we don't use that feature anyway. */
1173 b43legacy_write_probe_resp_template(dev, 0x268, 0x4A,
1174 &__b43legacy_ratetable[3]);
1175 wl->beacon0_uploaded = true;
1176 }
1177
1178 static void b43legacy_upload_beacon1(struct b43legacy_wldev *dev)
1179 {
1180 struct b43legacy_wl *wl = dev->wl;
1181
1182 if (wl->beacon1_uploaded)
1183 return;
1184 b43legacy_write_beacon_template(dev, 0x468, 0x1A);
1185 wl->beacon1_uploaded = true;
1186 }
1187
1188 static void handle_irq_beacon(struct b43legacy_wldev *dev)
1189 {
1190 struct b43legacy_wl *wl = dev->wl;
1191 u32 cmd, beacon0_valid, beacon1_valid;
1192
1193 if (!b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
1194 return;
1195
1196 /* This is the bottom half of the asynchronous beacon update. */
1197
1198 /* Ignore interrupt in the future. */
1199 dev->irq_mask &= ~B43legacy_IRQ_BEACON;
1200
1201 cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1202 beacon0_valid = (cmd & B43legacy_MACCMD_BEACON0_VALID);
1203 beacon1_valid = (cmd & B43legacy_MACCMD_BEACON1_VALID);
1204
1205 /* Schedule interrupt manually, if busy. */
1206 if (beacon0_valid && beacon1_valid) {
1207 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, B43legacy_IRQ_BEACON);
1208 dev->irq_mask |= B43legacy_IRQ_BEACON;
1209 return;
1210 }
1211
1212 if (unlikely(wl->beacon_templates_virgin)) {
1213 /* We never uploaded a beacon before.
1214 * Upload both templates now, but only mark one valid. */
1215 wl->beacon_templates_virgin = false;
1216 b43legacy_upload_beacon0(dev);
1217 b43legacy_upload_beacon1(dev);
1218 cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1219 cmd |= B43legacy_MACCMD_BEACON0_VALID;
1220 b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1221 } else {
1222 if (!beacon0_valid) {
1223 b43legacy_upload_beacon0(dev);
1224 cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1225 cmd |= B43legacy_MACCMD_BEACON0_VALID;
1226 b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1227 } else if (!beacon1_valid) {
1228 b43legacy_upload_beacon1(dev);
1229 cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1230 cmd |= B43legacy_MACCMD_BEACON1_VALID;
1231 b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1232 }
1233 }
1234 }
1235
1236 static void b43legacy_beacon_update_trigger_work(struct work_struct *work)
1237 {
1238 struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
1239 beacon_update_trigger);
1240 struct b43legacy_wldev *dev;
1241
1242 mutex_lock(&wl->mutex);
1243 dev = wl->current_dev;
1244 if (likely(dev && (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED))) {
1245 spin_lock_irq(&wl->irq_lock);
1246 /* Update beacon right away or defer to IRQ. */
1247 handle_irq_beacon(dev);
1248 /* The handler might have updated the IRQ mask. */
1249 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
1250 dev->irq_mask);
1251 mmiowb();
1252 spin_unlock_irq(&wl->irq_lock);
1253 }
1254 mutex_unlock(&wl->mutex);
1255 }
1256
1257 /* Asynchronously update the packet templates in template RAM.
1258 * Locking: Requires wl->irq_lock to be locked. */
1259 static void b43legacy_update_templates(struct b43legacy_wl *wl)
1260 {
1261 struct sk_buff *beacon;
1262 /* This is the top half of the ansynchronous beacon update. The bottom
1263 * half is the beacon IRQ. Beacon update must be asynchronous to avoid
1264 * sending an invalid beacon. This can happen for example, if the
1265 * firmware transmits a beacon while we are updating it. */
1266
1267 /* We could modify the existing beacon and set the aid bit in the TIM
1268 * field, but that would probably require resizing and moving of data
1269 * within the beacon template. Simply request a new beacon and let
1270 * mac80211 do the hard work. */
1271 beacon = ieee80211_beacon_get(wl->hw, wl->vif);
1272 if (unlikely(!beacon))
1273 return;
1274
1275 if (wl->current_beacon)
1276 dev_kfree_skb_any(wl->current_beacon);
1277 wl->current_beacon = beacon;
1278 wl->beacon0_uploaded = false;
1279 wl->beacon1_uploaded = false;
1280 ieee80211_queue_work(wl->hw, &wl->beacon_update_trigger);
1281 }
1282
1283 static void b43legacy_set_beacon_int(struct b43legacy_wldev *dev,
1284 u16 beacon_int)
1285 {
1286 b43legacy_time_lock(dev);
1287 if (dev->dev->id.revision >= 3) {
1288 b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_REP,
1289 (beacon_int << 16));
1290 b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_START,
1291 (beacon_int << 10));
1292 } else {
1293 b43legacy_write16(dev, 0x606, (beacon_int >> 6));
1294 b43legacy_write16(dev, 0x610, beacon_int);
1295 }
1296 b43legacy_time_unlock(dev);
1297 b43legacydbg(dev->wl, "Set beacon interval to %u\n", beacon_int);
1298 }
1299
1300 static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
1301 {
1302 }
1303
1304 /* Interrupt handler bottom-half */
1305 static void b43legacy_interrupt_tasklet(struct b43legacy_wldev *dev)
1306 {
1307 u32 reason;
1308 u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
1309 u32 merged_dma_reason = 0;
1310 int i;
1311 unsigned long flags;
1312
1313 spin_lock_irqsave(&dev->wl->irq_lock, flags);
1314
1315 B43legacy_WARN_ON(b43legacy_status(dev) <
1316 B43legacy_STAT_INITIALIZED);
1317
1318 reason = dev->irq_reason;
1319 for (i = 0; i < ARRAY_SIZE(dma_reason); i++) {
1320 dma_reason[i] = dev->dma_reason[i];
1321 merged_dma_reason |= dma_reason[i];
1322 }
1323
1324 if (unlikely(reason & B43legacy_IRQ_MAC_TXERR))
1325 b43legacyerr(dev->wl, "MAC transmission error\n");
1326
1327 if (unlikely(reason & B43legacy_IRQ_PHY_TXERR)) {
1328 b43legacyerr(dev->wl, "PHY transmission error\n");
1329 rmb();
1330 if (unlikely(atomic_dec_and_test(&dev->phy.txerr_cnt))) {
1331 b43legacyerr(dev->wl, "Too many PHY TX errors, "
1332 "restarting the controller\n");
1333 b43legacy_controller_restart(dev, "PHY TX errors");
1334 }
1335 }
1336
1337 if (unlikely(merged_dma_reason & (B43legacy_DMAIRQ_FATALMASK |
1338 B43legacy_DMAIRQ_NONFATALMASK))) {
1339 if (merged_dma_reason & B43legacy_DMAIRQ_FATALMASK) {
1340 b43legacyerr(dev->wl, "Fatal DMA error: "
1341 "0x%08X, 0x%08X, 0x%08X, "
1342 "0x%08X, 0x%08X, 0x%08X\n",
1343 dma_reason[0], dma_reason[1],
1344 dma_reason[2], dma_reason[3],
1345 dma_reason[4], dma_reason[5]);
1346 b43legacy_controller_restart(dev, "DMA error");
1347 mmiowb();
1348 spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1349 return;
1350 }
1351 if (merged_dma_reason & B43legacy_DMAIRQ_NONFATALMASK)
1352 b43legacyerr(dev->wl, "DMA error: "
1353 "0x%08X, 0x%08X, 0x%08X, "
1354 "0x%08X, 0x%08X, 0x%08X\n",
1355 dma_reason[0], dma_reason[1],
1356 dma_reason[2], dma_reason[3],
1357 dma_reason[4], dma_reason[5]);
1358 }
1359
1360 if (unlikely(reason & B43legacy_IRQ_UCODE_DEBUG))
1361 handle_irq_ucode_debug(dev);
1362 if (reason & B43legacy_IRQ_TBTT_INDI)
1363 handle_irq_tbtt_indication(dev);
1364 if (reason & B43legacy_IRQ_ATIM_END)
1365 handle_irq_atim_end(dev);
1366 if (reason & B43legacy_IRQ_BEACON)
1367 handle_irq_beacon(dev);
1368 if (reason & B43legacy_IRQ_PMQ)
1369 handle_irq_pmq(dev);
1370 if (reason & B43legacy_IRQ_TXFIFO_FLUSH_OK)
1371 ;/*TODO*/
1372 if (reason & B43legacy_IRQ_NOISESAMPLE_OK)
1373 handle_irq_noise(dev);
1374
1375 /* Check the DMA reason registers for received data. */
1376 if (dma_reason[0] & B43legacy_DMAIRQ_RX_DONE) {
1377 if (b43legacy_using_pio(dev))
1378 b43legacy_pio_rx(dev->pio.queue0);
1379 else
1380 b43legacy_dma_rx(dev->dma.rx_ring0);
1381 }
1382 B43legacy_WARN_ON(dma_reason[1] & B43legacy_DMAIRQ_RX_DONE);
1383 B43legacy_WARN_ON(dma_reason[2] & B43legacy_DMAIRQ_RX_DONE);
1384 if (dma_reason[3] & B43legacy_DMAIRQ_RX_DONE) {
1385 if (b43legacy_using_pio(dev))
1386 b43legacy_pio_rx(dev->pio.queue3);
1387 else
1388 b43legacy_dma_rx(dev->dma.rx_ring3);
1389 }
1390 B43legacy_WARN_ON(dma_reason[4] & B43legacy_DMAIRQ_RX_DONE);
1391 B43legacy_WARN_ON(dma_reason[5] & B43legacy_DMAIRQ_RX_DONE);
1392
1393 if (reason & B43legacy_IRQ_TX_OK)
1394 handle_irq_transmit_status(dev);
1395
1396 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
1397 mmiowb();
1398 spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1399 }
1400
1401 static void pio_irq_workaround(struct b43legacy_wldev *dev,
1402 u16 base, int queueidx)
1403 {
1404 u16 rxctl;
1405
1406 rxctl = b43legacy_read16(dev, base + B43legacy_PIO_RXCTL);
1407 if (rxctl & B43legacy_PIO_RXCTL_DATAAVAILABLE)
1408 dev->dma_reason[queueidx] |= B43legacy_DMAIRQ_RX_DONE;
1409 else
1410 dev->dma_reason[queueidx] &= ~B43legacy_DMAIRQ_RX_DONE;
1411 }
1412
1413 static void b43legacy_interrupt_ack(struct b43legacy_wldev *dev, u32 reason)
1414 {
1415 if (b43legacy_using_pio(dev) &&
1416 (dev->dev->id.revision < 3) &&
1417 (!(reason & B43legacy_IRQ_PIO_WORKAROUND))) {
1418 /* Apply a PIO specific workaround to the dma_reasons */
1419 pio_irq_workaround(dev, B43legacy_MMIO_PIO1_BASE, 0);
1420 pio_irq_workaround(dev, B43legacy_MMIO_PIO2_BASE, 1);
1421 pio_irq_workaround(dev, B43legacy_MMIO_PIO3_BASE, 2);
1422 pio_irq_workaround(dev, B43legacy_MMIO_PIO4_BASE, 3);
1423 }
1424
1425 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, reason);
1426
1427 b43legacy_write32(dev, B43legacy_MMIO_DMA0_REASON,
1428 dev->dma_reason[0]);
1429 b43legacy_write32(dev, B43legacy_MMIO_DMA1_REASON,
1430 dev->dma_reason[1]);
1431 b43legacy_write32(dev, B43legacy_MMIO_DMA2_REASON,
1432 dev->dma_reason[2]);
1433 b43legacy_write32(dev, B43legacy_MMIO_DMA3_REASON,
1434 dev->dma_reason[3]);
1435 b43legacy_write32(dev, B43legacy_MMIO_DMA4_REASON,
1436 dev->dma_reason[4]);
1437 b43legacy_write32(dev, B43legacy_MMIO_DMA5_REASON,
1438 dev->dma_reason[5]);
1439 }
1440
1441 /* Interrupt handler top-half */
1442 static irqreturn_t b43legacy_interrupt_handler(int irq, void *dev_id)
1443 {
1444 irqreturn_t ret = IRQ_NONE;
1445 struct b43legacy_wldev *dev = dev_id;
1446 u32 reason;
1447
1448 B43legacy_WARN_ON(!dev);
1449
1450 spin_lock(&dev->wl->irq_lock);
1451
1452 if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
1453 /* This can only happen on shared IRQ lines. */
1454 goto out;
1455 reason = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1456 if (reason == 0xffffffff) /* shared IRQ */
1457 goto out;
1458 ret = IRQ_HANDLED;
1459 reason &= dev->irq_mask;
1460 if (!reason)
1461 goto out;
1462
1463 dev->dma_reason[0] = b43legacy_read32(dev,
1464 B43legacy_MMIO_DMA0_REASON)
1465 & 0x0001DC00;
1466 dev->dma_reason[1] = b43legacy_read32(dev,
1467 B43legacy_MMIO_DMA1_REASON)
1468 & 0x0000DC00;
1469 dev->dma_reason[2] = b43legacy_read32(dev,
1470 B43legacy_MMIO_DMA2_REASON)
1471 & 0x0000DC00;
1472 dev->dma_reason[3] = b43legacy_read32(dev,
1473 B43legacy_MMIO_DMA3_REASON)
1474 & 0x0001DC00;
1475 dev->dma_reason[4] = b43legacy_read32(dev,
1476 B43legacy_MMIO_DMA4_REASON)
1477 & 0x0000DC00;
1478 dev->dma_reason[5] = b43legacy_read32(dev,
1479 B43legacy_MMIO_DMA5_REASON)
1480 & 0x0000DC00;
1481
1482 b43legacy_interrupt_ack(dev, reason);
1483 /* Disable all IRQs. They are enabled again in the bottom half. */
1484 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
1485 /* Save the reason code and call our bottom half. */
1486 dev->irq_reason = reason;
1487 tasklet_schedule(&dev->isr_tasklet);
1488 out:
1489 mmiowb();
1490 spin_unlock(&dev->wl->irq_lock);
1491
1492 return ret;
1493 }
1494
1495 static void b43legacy_release_firmware(struct b43legacy_wldev *dev)
1496 {
1497 release_firmware(dev->fw.ucode);
1498 dev->fw.ucode = NULL;
1499 release_firmware(dev->fw.pcm);
1500 dev->fw.pcm = NULL;
1501 release_firmware(dev->fw.initvals);
1502 dev->fw.initvals = NULL;
1503 release_firmware(dev->fw.initvals_band);
1504 dev->fw.initvals_band = NULL;
1505 }
1506
1507 static void b43legacy_print_fw_helptext(struct b43legacy_wl *wl)
1508 {
1509 b43legacyerr(wl, "You must go to http://linuxwireless.org/en/users/"
1510 "Drivers/b43#devicefirmware "
1511 "and download the correct firmware (version 3).\n");
1512 }
1513
1514 static int do_request_fw(struct b43legacy_wldev *dev,
1515 const char *name,
1516 const struct firmware **fw)
1517 {
1518 char path[sizeof(modparam_fwpostfix) + 32];
1519 struct b43legacy_fw_header *hdr;
1520 u32 size;
1521 int err;
1522
1523 if (!name)
1524 return 0;
1525
1526 snprintf(path, ARRAY_SIZE(path),
1527 "b43legacy%s/%s.fw",
1528 modparam_fwpostfix, name);
1529 err = request_firmware(fw, path, dev->dev->dev);
1530 if (err) {
1531 b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
1532 "or load failed.\n", path);
1533 return err;
1534 }
1535 if ((*fw)->size < sizeof(struct b43legacy_fw_header))
1536 goto err_format;
1537 hdr = (struct b43legacy_fw_header *)((*fw)->data);
1538 switch (hdr->type) {
1539 case B43legacy_FW_TYPE_UCODE:
1540 case B43legacy_FW_TYPE_PCM:
1541 size = be32_to_cpu(hdr->size);
1542 if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
1543 goto err_format;
1544 /* fallthrough */
1545 case B43legacy_FW_TYPE_IV:
1546 if (hdr->ver != 1)
1547 goto err_format;
1548 break;
1549 default:
1550 goto err_format;
1551 }
1552
1553 return err;
1554
1555 err_format:
1556 b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
1557 return -EPROTO;
1558 }
1559
1560 static int b43legacy_request_firmware(struct b43legacy_wldev *dev)
1561 {
1562 struct b43legacy_firmware *fw = &dev->fw;
1563 const u8 rev = dev->dev->id.revision;
1564 const char *filename;
1565 int err;
1566
1567 if (!fw->ucode) {
1568 if (rev == 2)
1569 filename = "ucode2";
1570 else if (rev == 4)
1571 filename = "ucode4";
1572 else
1573 filename = "ucode5";
1574 err = do_request_fw(dev, filename, &fw->ucode);
1575 if (err)
1576 goto err_load;
1577 }
1578 if (!fw->pcm) {
1579 if (rev < 5)
1580 filename = "pcm4";
1581 else
1582 filename = "pcm5";
1583 err = do_request_fw(dev, filename, &fw->pcm);
1584 if (err)
1585 goto err_load;
1586 }
1587 if (!fw->initvals) {
1588 switch (dev->phy.type) {
1589 case B43legacy_PHYTYPE_B:
1590 case B43legacy_PHYTYPE_G:
1591 if ((rev >= 5) && (rev <= 10))
1592 filename = "b0g0initvals5";
1593 else if (rev == 2 || rev == 4)
1594 filename = "b0g0initvals2";
1595 else
1596 goto err_no_initvals;
1597 break;
1598 default:
1599 goto err_no_initvals;
1600 }
1601 err = do_request_fw(dev, filename, &fw->initvals);
1602 if (err)
1603 goto err_load;
1604 }
1605 if (!fw->initvals_band) {
1606 switch (dev->phy.type) {
1607 case B43legacy_PHYTYPE_B:
1608 case B43legacy_PHYTYPE_G:
1609 if ((rev >= 5) && (rev <= 10))
1610 filename = "b0g0bsinitvals5";
1611 else if (rev >= 11)
1612 filename = NULL;
1613 else if (rev == 2 || rev == 4)
1614 filename = NULL;
1615 else
1616 goto err_no_initvals;
1617 break;
1618 default:
1619 goto err_no_initvals;
1620 }
1621 err = do_request_fw(dev, filename, &fw->initvals_band);
1622 if (err)
1623 goto err_load;
1624 }
1625
1626 return 0;
1627
1628 err_load:
1629 b43legacy_print_fw_helptext(dev->wl);
1630 goto error;
1631
1632 err_no_initvals:
1633 err = -ENODEV;
1634 b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
1635 "core rev %u\n", dev->phy.type, rev);
1636 goto error;
1637
1638 error:
1639 b43legacy_release_firmware(dev);
1640 return err;
1641 }
1642
1643 static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
1644 {
1645 struct wiphy *wiphy = dev->wl->hw->wiphy;
1646 const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1647 const __be32 *data;
1648 unsigned int i;
1649 unsigned int len;
1650 u16 fwrev;
1651 u16 fwpatch;
1652 u16 fwdate;
1653 u16 fwtime;
1654 u32 tmp, macctl;
1655 int err = 0;
1656
1657 /* Jump the microcode PSM to offset 0 */
1658 macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1659 B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
1660 macctl |= B43legacy_MACCTL_PSM_JMP0;
1661 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1662 /* Zero out all microcode PSM registers and shared memory. */
1663 for (i = 0; i < 64; i++)
1664 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
1665 for (i = 0; i < 4096; i += 2)
1666 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);
1667
1668 /* Upload Microcode. */
1669 data = (__be32 *) (dev->fw.ucode->data + hdr_len);
1670 len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
1671 b43legacy_shm_control_word(dev,
1672 B43legacy_SHM_UCODE |
1673 B43legacy_SHM_AUTOINC_W,
1674 0x0000);
1675 for (i = 0; i < len; i++) {
1676 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1677 be32_to_cpu(data[i]));
1678 udelay(10);
1679 }
1680
1681 if (dev->fw.pcm) {
1682 /* Upload PCM data. */
1683 data = (__be32 *) (dev->fw.pcm->data + hdr_len);
1684 len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
1685 b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
1686 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
1687 /* No need for autoinc bit in SHM_HW */
1688 b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
1689 for (i = 0; i < len; i++) {
1690 b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1691 be32_to_cpu(data[i]));
1692 udelay(10);
1693 }
1694 }
1695
1696 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1697 B43legacy_IRQ_ALL);
1698
1699 /* Start the microcode PSM */
1700 macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1701 macctl &= ~B43legacy_MACCTL_PSM_JMP0;
1702 macctl |= B43legacy_MACCTL_PSM_RUN;
1703 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1704
1705 /* Wait for the microcode to load and respond */
1706 i = 0;
1707 while (1) {
1708 tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1709 if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
1710 break;
1711 i++;
1712 if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
1713 b43legacyerr(dev->wl, "Microcode not responding\n");
1714 b43legacy_print_fw_helptext(dev->wl);
1715 err = -ENODEV;
1716 goto error;
1717 }
1718 msleep_interruptible(50);
1719 if (signal_pending(current)) {
1720 err = -EINTR;
1721 goto error;
1722 }
1723 }
1724 /* dummy read follows */
1725 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1726
1727 /* Get and check the revisions. */
1728 fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1729 B43legacy_SHM_SH_UCODEREV);
1730 fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1731 B43legacy_SHM_SH_UCODEPATCH);
1732 fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1733 B43legacy_SHM_SH_UCODEDATE);
1734 fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1735 B43legacy_SHM_SH_UCODETIME);
1736
1737 if (fwrev > 0x128) {
1738 b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
1739 " Only firmware from binary drivers version 3.x"
1740 " is supported. You must change your firmware"
1741 " files.\n");
1742 b43legacy_print_fw_helptext(dev->wl);
1743 err = -EOPNOTSUPP;
1744 goto error;
1745 }
1746 b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
1747 "(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
1748 (fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
1749 (fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
1750 fwtime & 0x1F);
1751
1752 dev->fw.rev = fwrev;
1753 dev->fw.patch = fwpatch;
1754
1755 snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "%u.%u",
1756 dev->fw.rev, dev->fw.patch);
1757 wiphy->hw_version = dev->dev->id.coreid;
1758
1759 return 0;
1760
1761 error:
1762 macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1763 macctl &= ~B43legacy_MACCTL_PSM_RUN;
1764 macctl |= B43legacy_MACCTL_PSM_JMP0;
1765 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1766
1767 return err;
1768 }
1769
1770 static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
1771 const struct b43legacy_iv *ivals,
1772 size_t count,
1773 size_t array_size)
1774 {
1775 const struct b43legacy_iv *iv;
1776 u16 offset;
1777 size_t i;
1778 bool bit32;
1779
1780 BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
1781 iv = ivals;
1782 for (i = 0; i < count; i++) {
1783 if (array_size < sizeof(iv->offset_size))
1784 goto err_format;
1785 array_size -= sizeof(iv->offset_size);
1786 offset = be16_to_cpu(iv->offset_size);
1787 bit32 = !!(offset & B43legacy_IV_32BIT);
1788 offset &= B43legacy_IV_OFFSET_MASK;
1789 if (offset >= 0x1000)
1790 goto err_format;
1791 if (bit32) {
1792 u32 value;
1793
1794 if (array_size < sizeof(iv->data.d32))
1795 goto err_format;
1796 array_size -= sizeof(iv->data.d32);
1797
1798 value = get_unaligned_be32(&iv->data.d32);
1799 b43legacy_write32(dev, offset, value);
1800
1801 iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1802 sizeof(__be16) +
1803 sizeof(__be32));
1804 } else {
1805 u16 value;
1806
1807 if (array_size < sizeof(iv->data.d16))
1808 goto err_format;
1809 array_size -= sizeof(iv->data.d16);
1810
1811 value = be16_to_cpu(iv->data.d16);
1812 b43legacy_write16(dev, offset, value);
1813
1814 iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1815 sizeof(__be16) +
1816 sizeof(__be16));
1817 }
1818 }
1819 if (array_size)
1820 goto err_format;
1821
1822 return 0;
1823
1824 err_format:
1825 b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
1826 b43legacy_print_fw_helptext(dev->wl);
1827
1828 return -EPROTO;
1829 }
1830
1831 static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
1832 {
1833 const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1834 const struct b43legacy_fw_header *hdr;
1835 struct b43legacy_firmware *fw = &dev->fw;
1836 const struct b43legacy_iv *ivals;
1837 size_t count;
1838 int err;
1839
1840 hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
1841 ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
1842 count = be32_to_cpu(hdr->size);
1843 err = b43legacy_write_initvals(dev, ivals, count,
1844 fw->initvals->size - hdr_len);
1845 if (err)
1846 goto out;
1847 if (fw->initvals_band) {
1848 hdr = (const struct b43legacy_fw_header *)
1849 (fw->initvals_band->data);
1850 ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
1851 + hdr_len);
1852 count = be32_to_cpu(hdr->size);
1853 err = b43legacy_write_initvals(dev, ivals, count,
1854 fw->initvals_band->size - hdr_len);
1855 if (err)
1856 goto out;
1857 }
1858 out:
1859
1860 return err;
1861 }
1862
1863 /* Initialize the GPIOs
1864 * http://bcm-specs.sipsolutions.net/GPIO
1865 */
1866 static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
1867 {
1868 struct ssb_bus *bus = dev->dev->bus;
1869 struct ssb_device *gpiodev, *pcidev = NULL;
1870 u32 mask;
1871 u32 set;
1872
1873 b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1874 b43legacy_read32(dev,
1875 B43legacy_MMIO_MACCTL)
1876 & 0xFFFF3FFF);
1877
1878 b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1879 b43legacy_read16(dev,
1880 B43legacy_MMIO_GPIO_MASK)
1881 | 0x000F);
1882
1883 mask = 0x0000001F;
1884 set = 0x0000000F;
1885 if (dev->dev->bus->chip_id == 0x4301) {
1886 mask |= 0x0060;
1887 set |= 0x0060;
1888 }
1889 if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
1890 b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1891 b43legacy_read16(dev,
1892 B43legacy_MMIO_GPIO_MASK)
1893 | 0x0200);
1894 mask |= 0x0200;
1895 set |= 0x0200;
1896 }
1897 if (dev->dev->id.revision >= 2)
1898 mask |= 0x0010; /* FIXME: This is redundant. */
1899
1900 #ifdef CONFIG_SSB_DRIVER_PCICORE
1901 pcidev = bus->pcicore.dev;
1902 #endif
1903 gpiodev = bus->chipco.dev ? : pcidev;
1904 if (!gpiodev)
1905 return 0;
1906 ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
1907 (ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
1908 & mask) | set);
1909
1910 return 0;
1911 }
1912
1913 /* Turn off all GPIO stuff. Call this on module unload, for example. */
1914 static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
1915 {
1916 struct ssb_bus *bus = dev->dev->bus;
1917 struct ssb_device *gpiodev, *pcidev = NULL;
1918
1919 #ifdef CONFIG_SSB_DRIVER_PCICORE
1920 pcidev = bus->pcicore.dev;
1921 #endif
1922 gpiodev = bus->chipco.dev ? : pcidev;
1923 if (!gpiodev)
1924 return;
1925 ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
1926 }
1927
1928 /* http://bcm-specs.sipsolutions.net/EnableMac */
1929 void b43legacy_mac_enable(struct b43legacy_wldev *dev)
1930 {
1931 dev->mac_suspended--;
1932 B43legacy_WARN_ON(dev->mac_suspended < 0);
1933 B43legacy_WARN_ON(irqs_disabled());
1934 if (dev->mac_suspended == 0) {
1935 b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1936 b43legacy_read32(dev,
1937 B43legacy_MMIO_MACCTL)
1938 | B43legacy_MACCTL_ENABLED);
1939 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1940 B43legacy_IRQ_MAC_SUSPENDED);
1941 /* the next two are dummy reads */
1942 b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1943 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1944 b43legacy_power_saving_ctl_bits(dev, -1, -1);
1945
1946 /* Re-enable IRQs. */
1947 spin_lock_irq(&dev->wl->irq_lock);
1948 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
1949 dev->irq_mask);
1950 spin_unlock_irq(&dev->wl->irq_lock);
1951 }
1952 }
1953
1954 /* http://bcm-specs.sipsolutions.net/SuspendMAC */
1955 void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
1956 {
1957 int i;
1958 u32 tmp;
1959
1960 might_sleep();
1961 B43legacy_WARN_ON(irqs_disabled());
1962 B43legacy_WARN_ON(dev->mac_suspended < 0);
1963
1964 if (dev->mac_suspended == 0) {
1965 /* Mask IRQs before suspending MAC. Otherwise
1966 * the MAC stays busy and won't suspend. */
1967 spin_lock_irq(&dev->wl->irq_lock);
1968 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
1969 spin_unlock_irq(&dev->wl->irq_lock);
1970 b43legacy_synchronize_irq(dev);
1971
1972 b43legacy_power_saving_ctl_bits(dev, -1, 1);
1973 b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1974 b43legacy_read32(dev,
1975 B43legacy_MMIO_MACCTL)
1976 & ~B43legacy_MACCTL_ENABLED);
1977 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1978 for (i = 40; i; i--) {
1979 tmp = b43legacy_read32(dev,
1980 B43legacy_MMIO_GEN_IRQ_REASON);
1981 if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
1982 goto out;
1983 msleep(1);
1984 }
1985 b43legacyerr(dev->wl, "MAC suspend failed\n");
1986 }
1987 out:
1988 dev->mac_suspended++;
1989 }
1990
1991 static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
1992 {
1993 struct b43legacy_wl *wl = dev->wl;
1994 u32 ctl;
1995 u16 cfp_pretbtt;
1996
1997 ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1998 /* Reset status to STA infrastructure mode. */
1999 ctl &= ~B43legacy_MACCTL_AP;
2000 ctl &= ~B43legacy_MACCTL_KEEP_CTL;
2001 ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
2002 ctl &= ~B43legacy_MACCTL_KEEP_BAD;
2003 ctl &= ~B43legacy_MACCTL_PROMISC;
2004 ctl &= ~B43legacy_MACCTL_BEACPROMISC;
2005 ctl |= B43legacy_MACCTL_INFRA;
2006
2007 if (b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
2008 ctl |= B43legacy_MACCTL_AP;
2009 else if (b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC))
2010 ctl &= ~B43legacy_MACCTL_INFRA;
2011
2012 if (wl->filter_flags & FIF_CONTROL)
2013 ctl |= B43legacy_MACCTL_KEEP_CTL;
2014 if (wl->filter_flags & FIF_FCSFAIL)
2015 ctl |= B43legacy_MACCTL_KEEP_BAD;
2016 if (wl->filter_flags & FIF_PLCPFAIL)
2017 ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
2018 if (wl->filter_flags & FIF_PROMISC_IN_BSS)
2019 ctl |= B43legacy_MACCTL_PROMISC;
2020 if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
2021 ctl |= B43legacy_MACCTL_BEACPROMISC;
2022
2023 /* Workaround: On old hardware the HW-MAC-address-filter
2024 * doesn't work properly, so always run promisc in filter
2025 * it in software. */
2026 if (dev->dev->id.revision <= 4)
2027 ctl |= B43legacy_MACCTL_PROMISC;
2028
2029 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);
2030
2031 cfp_pretbtt = 2;
2032 if ((ctl & B43legacy_MACCTL_INFRA) &&
2033 !(ctl & B43legacy_MACCTL_AP)) {
2034 if (dev->dev->bus->chip_id == 0x4306 &&
2035 dev->dev->bus->chip_rev == 3)
2036 cfp_pretbtt = 100;
2037 else
2038 cfp_pretbtt = 50;
2039 }
2040 b43legacy_write16(dev, 0x612, cfp_pretbtt);
2041 }
2042
2043 static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
2044 u16 rate,
2045 int is_ofdm)
2046 {
2047 u16 offset;
2048
2049 if (is_ofdm) {
2050 offset = 0x480;
2051 offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
2052 } else {
2053 offset = 0x4C0;
2054 offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
2055 }
2056 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
2057 b43legacy_shm_read16(dev,
2058 B43legacy_SHM_SHARED, offset));
2059 }
2060
2061 static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
2062 {
2063 switch (dev->phy.type) {
2064 case B43legacy_PHYTYPE_G:
2065 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
2066 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
2067 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
2068 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
2069 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
2070 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
2071 b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
2072 /* fallthrough */
2073 case B43legacy_PHYTYPE_B:
2074 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
2075 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
2076 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
2077 b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
2078 break;
2079 default:
2080 B43legacy_BUG_ON(1);
2081 }
2082 }
2083
2084 /* Set the TX-Antenna for management frames sent by firmware. */
2085 static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
2086 int antenna)
2087 {
2088 u16 ant = 0;
2089 u16 tmp;
2090
2091 switch (antenna) {
2092 case B43legacy_ANTENNA0:
2093 ant |= B43legacy_TX4_PHY_ANT0;
2094 break;
2095 case B43legacy_ANTENNA1:
2096 ant |= B43legacy_TX4_PHY_ANT1;
2097 break;
2098 case B43legacy_ANTENNA_AUTO:
2099 ant |= B43legacy_TX4_PHY_ANTLAST;
2100 break;
2101 default:
2102 B43legacy_BUG_ON(1);
2103 }
2104
2105 /* FIXME We also need to set the other flags of the PHY control
2106 * field somewhere. */
2107
2108 /* For Beacons */
2109 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2110 B43legacy_SHM_SH_BEACPHYCTL);
2111 tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2112 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2113 B43legacy_SHM_SH_BEACPHYCTL, tmp);
2114 /* For ACK/CTS */
2115 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2116 B43legacy_SHM_SH_ACKCTSPHYCTL);
2117 tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2118 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2119 B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
2120 /* For Probe Resposes */
2121 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2122 B43legacy_SHM_SH_PRPHYCTL);
2123 tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2124 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2125 B43legacy_SHM_SH_PRPHYCTL, tmp);
2126 }
2127
2128 /* This is the opposite of b43legacy_chip_init() */
2129 static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
2130 {
2131 b43legacy_radio_turn_off(dev, 1);
2132 b43legacy_gpio_cleanup(dev);
2133 /* firmware is released later */
2134 }
2135
2136 /* Initialize the chip
2137 * http://bcm-specs.sipsolutions.net/ChipInit
2138 */
2139 static int b43legacy_chip_init(struct b43legacy_wldev *dev)
2140 {
2141 struct b43legacy_phy *phy = &dev->phy;
2142 int err;
2143 int tmp;
2144 u32 value32, macctl;
2145 u16 value16;
2146
2147 /* Initialize the MAC control */
2148 macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
2149 if (dev->phy.gmode)
2150 macctl |= B43legacy_MACCTL_GMODE;
2151 macctl |= B43legacy_MACCTL_INFRA;
2152 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
2153
2154 err = b43legacy_request_firmware(dev);
2155 if (err)
2156 goto out;
2157 err = b43legacy_upload_microcode(dev);
2158 if (err)
2159 goto out; /* firmware is released later */
2160
2161 err = b43legacy_gpio_init(dev);
2162 if (err)
2163 goto out; /* firmware is released later */
2164
2165 err = b43legacy_upload_initvals(dev);
2166 if (err)
2167 goto err_gpio_clean;
2168 b43legacy_radio_turn_on(dev);
2169
2170 b43legacy_write16(dev, 0x03E6, 0x0000);
2171 err = b43legacy_phy_init(dev);
2172 if (err)
2173 goto err_radio_off;
2174
2175 /* Select initial Interference Mitigation. */
2176 tmp = phy->interfmode;
2177 phy->interfmode = B43legacy_INTERFMODE_NONE;
2178 b43legacy_radio_set_interference_mitigation(dev, tmp);
2179
2180 b43legacy_phy_set_antenna_diversity(dev);
2181 b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);
2182
2183 if (phy->type == B43legacy_PHYTYPE_B) {
2184 value16 = b43legacy_read16(dev, 0x005E);
2185 value16 |= 0x0004;
2186 b43legacy_write16(dev, 0x005E, value16);
2187 }
2188 b43legacy_write32(dev, 0x0100, 0x01000000);
2189 if (dev->dev->id.revision < 5)
2190 b43legacy_write32(dev, 0x010C, 0x01000000);
2191
2192 value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2193 value32 &= ~B43legacy_MACCTL_INFRA;
2194 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2195 value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2196 value32 |= B43legacy_MACCTL_INFRA;
2197 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2198
2199 if (b43legacy_using_pio(dev)) {
2200 b43legacy_write32(dev, 0x0210, 0x00000100);
2201 b43legacy_write32(dev, 0x0230, 0x00000100);
2202 b43legacy_write32(dev, 0x0250, 0x00000100);
2203 b43legacy_write32(dev, 0x0270, 0x00000100);
2204 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
2205 0x0000);
2206 }
2207
2208 /* Probe Response Timeout value */
2209 /* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
2210 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);
2211
2212 /* Initially set the wireless operation mode. */
2213 b43legacy_adjust_opmode(dev);
2214
2215 if (dev->dev->id.revision < 3) {
2216 b43legacy_write16(dev, 0x060E, 0x0000);
2217 b43legacy_write16(dev, 0x0610, 0x8000);
2218 b43legacy_write16(dev, 0x0604, 0x0000);
2219 b43legacy_write16(dev, 0x0606, 0x0200);
2220 } else {
2221 b43legacy_write32(dev, 0x0188, 0x80000000);
2222 b43legacy_write32(dev, 0x018C, 0x02000000);
2223 }
2224 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
2225 b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
2226 b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
2227 b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
2228 b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
2229 b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
2230 b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);
2231
2232 value32 = ssb_read32(dev->dev, SSB_TMSLOW);
2233 value32 |= B43legacy_TMSLOW_MACPHYCLKEN;
2234 ssb_write32(dev->dev, SSB_TMSLOW, value32);
2235
2236 b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
2237 dev->dev->bus->chipco.fast_pwrup_delay);
2238
2239 /* PHY TX errors counter. */
2240 atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2241
2242 B43legacy_WARN_ON(err != 0);
2243 b43legacydbg(dev->wl, "Chip initialized\n");
2244 out:
2245 return err;
2246
2247 err_radio_off:
2248 b43legacy_radio_turn_off(dev, 1);
2249 err_gpio_clean:
2250 b43legacy_gpio_cleanup(dev);
2251 goto out;
2252 }
2253
2254 static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
2255 {
2256 struct b43legacy_phy *phy = &dev->phy;
2257
2258 if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
2259 return;
2260
2261 b43legacy_mac_suspend(dev);
2262 b43legacy_phy_lo_g_measure(dev);
2263 b43legacy_mac_enable(dev);
2264 }
2265
2266 static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
2267 {
2268 b43legacy_phy_lo_mark_all_unused(dev);
2269 if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
2270 b43legacy_mac_suspend(dev);
2271 b43legacy_calc_nrssi_slope(dev);
2272 b43legacy_mac_enable(dev);
2273 }
2274 }
2275
2276 static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
2277 {
2278 /* Update device statistics. */
2279 b43legacy_calculate_link_quality(dev);
2280 }
2281
2282 static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
2283 {
2284 b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */
2285
2286 atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2287 wmb();
2288 }
2289
2290 static void do_periodic_work(struct b43legacy_wldev *dev)
2291 {
2292 unsigned int state;
2293
2294 state = dev->periodic_state;
2295 if (state % 8 == 0)
2296 b43legacy_periodic_every120sec(dev);
2297 if (state % 4 == 0)
2298 b43legacy_periodic_every60sec(dev);
2299 if (state % 2 == 0)
2300 b43legacy_periodic_every30sec(dev);
2301 b43legacy_periodic_every15sec(dev);
2302 }
2303
2304 /* Periodic work locking policy:
2305 * The whole periodic work handler is protected by
2306 * wl->mutex. If another lock is needed somewhere in the
2307 * pwork callchain, it's acquired in-place, where it's needed.
2308 */
2309 static void b43legacy_periodic_work_handler(struct work_struct *work)
2310 {
2311 struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
2312 periodic_work.work);
2313 struct b43legacy_wl *wl = dev->wl;
2314 unsigned long delay;
2315
2316 mutex_lock(&wl->mutex);
2317
2318 if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
2319 goto out;
2320 if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
2321 goto out_requeue;
2322
2323 do_periodic_work(dev);
2324
2325 dev->periodic_state++;
2326 out_requeue:
2327 if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
2328 delay = msecs_to_jiffies(50);
2329 else
2330 delay = round_jiffies_relative(HZ * 15);
2331 ieee80211_queue_delayed_work(wl->hw, &dev->periodic_work, delay);
2332 out:
2333 mutex_unlock(&wl->mutex);
2334 }
2335
2336 static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
2337 {
2338 struct delayed_work *work = &dev->periodic_work;
2339
2340 dev->periodic_state = 0;
2341 INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
2342 ieee80211_queue_delayed_work(dev->wl->hw, work, 0);
2343 }
2344
2345 /* Validate access to the chip (SHM) */
2346 static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
2347 {
2348 u32 value;
2349 u32 shm_backup;
2350
2351 shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
2352 b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
2353 if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2354 0xAA5555AA)
2355 goto error;
2356 b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
2357 if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2358 0x55AAAA55)
2359 goto error;
2360 b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);
2361
2362 value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2363 if ((value | B43legacy_MACCTL_GMODE) !=
2364 (B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
2365 goto error;
2366
2367 value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
2368 if (value)
2369 goto error;
2370
2371 return 0;
2372 error:
2373 b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
2374 return -ENODEV;
2375 }
2376
2377 static void b43legacy_security_init(struct b43legacy_wldev *dev)
2378 {
2379 dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
2380 B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
2381 dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2382 0x0056);
2383 /* KTP is a word address, but we address SHM bytewise.
2384 * So multiply by two.
2385 */
2386 dev->ktp *= 2;
2387 if (dev->dev->id.revision >= 5)
2388 /* Number of RCMTA address slots */
2389 b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
2390 dev->max_nr_keys - 8);
2391 }
2392
2393 #ifdef CONFIG_B43LEGACY_HWRNG
2394 static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
2395 {
2396 struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
2397 unsigned long flags;
2398
2399 /* Don't take wl->mutex here, as it could deadlock with
2400 * hwrng internal locking. It's not needed to take
2401 * wl->mutex here, anyway. */
2402
2403 spin_lock_irqsave(&wl->irq_lock, flags);
2404 *data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
2405 spin_unlock_irqrestore(&wl->irq_lock, flags);
2406
2407 return (sizeof(u16));
2408 }
2409 #endif
2410
2411 static void b43legacy_rng_exit(struct b43legacy_wl *wl)
2412 {
2413 #ifdef CONFIG_B43LEGACY_HWRNG
2414 if (wl->rng_initialized)
2415 hwrng_unregister(&wl->rng);
2416 #endif
2417 }
2418
2419 static int b43legacy_rng_init(struct b43legacy_wl *wl)
2420 {
2421 int err = 0;
2422
2423 #ifdef CONFIG_B43LEGACY_HWRNG
2424 snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
2425 "%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
2426 wl->rng.name = wl->rng_name;
2427 wl->rng.data_read = b43legacy_rng_read;
2428 wl->rng.priv = (unsigned long)wl;
2429 wl->rng_initialized = 1;
2430 err = hwrng_register(&wl->rng);
2431 if (err) {
2432 wl->rng_initialized = 0;
2433 b43legacyerr(wl, "Failed to register the random "
2434 "number generator (%d)\n", err);
2435 }
2436
2437 #endif
2438 return err;
2439 }
2440
2441 static void b43legacy_tx_work(struct work_struct *work)
2442 {
2443 struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
2444 tx_work);
2445 struct b43legacy_wldev *dev;
2446 struct sk_buff *skb;
2447 int queue_num;
2448 int err = 0;
2449
2450 mutex_lock(&wl->mutex);
2451 dev = wl->current_dev;
2452 if (unlikely(!dev || b43legacy_status(dev) < B43legacy_STAT_STARTED)) {
2453 mutex_unlock(&wl->mutex);
2454 return;
2455 }
2456
2457 for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2458 while (skb_queue_len(&wl->tx_queue[queue_num])) {
2459 skb = skb_dequeue(&wl->tx_queue[queue_num]);
2460 if (b43legacy_using_pio(dev))
2461 err = b43legacy_pio_tx(dev, skb);
2462 else
2463 err = b43legacy_dma_tx(dev, skb);
2464 if (err == -ENOSPC) {
2465 wl->tx_queue_stopped[queue_num] = 1;
2466 ieee80211_stop_queue(wl->hw, queue_num);
2467 skb_queue_head(&wl->tx_queue[queue_num], skb);
2468 break;
2469 }
2470 if (unlikely(err))
2471 dev_kfree_skb(skb); /* Drop it */
2472 err = 0;
2473 }
2474
2475 if (!err)
2476 wl->tx_queue_stopped[queue_num] = 0;
2477 }
2478
2479 mutex_unlock(&wl->mutex);
2480 }
2481
2482 static void b43legacy_op_tx(struct ieee80211_hw *hw,
2483 struct sk_buff *skb)
2484 {
2485 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2486
2487 if (unlikely(skb->len < 2 + 2 + 6)) {
2488 /* Too short, this can't be a valid frame. */
2489 dev_kfree_skb_any(skb);
2490 return;
2491 }
2492 B43legacy_WARN_ON(skb_shinfo(skb)->nr_frags);
2493
2494 skb_queue_tail(&wl->tx_queue[skb->queue_mapping], skb);
2495 if (!wl->tx_queue_stopped[skb->queue_mapping])
2496 ieee80211_queue_work(wl->hw, &wl->tx_work);
2497 else
2498 ieee80211_stop_queue(wl->hw, skb->queue_mapping);
2499 }
2500
2501 static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
2502 struct ieee80211_vif *vif, u16 queue,
2503 const struct ieee80211_tx_queue_params *params)
2504 {
2505 return 0;
2506 }
2507
2508 static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
2509 struct ieee80211_low_level_stats *stats)
2510 {
2511 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2512 unsigned long flags;
2513
2514 spin_lock_irqsave(&wl->irq_lock, flags);
2515 memcpy(stats, &wl->ieee_stats, sizeof(*stats));
2516 spin_unlock_irqrestore(&wl->irq_lock, flags);
2517
2518 return 0;
2519 }
2520
2521 static const char *phymode_to_string(unsigned int phymode)
2522 {
2523 switch (phymode) {
2524 case B43legacy_PHYMODE_B:
2525 return "B";
2526 case B43legacy_PHYMODE_G:
2527 return "G";
2528 default:
2529 B43legacy_BUG_ON(1);
2530 }
2531 return "";
2532 }
2533
2534 static int find_wldev_for_phymode(struct b43legacy_wl *wl,
2535 unsigned int phymode,
2536 struct b43legacy_wldev **dev,
2537 bool *gmode)
2538 {
2539 struct b43legacy_wldev *d;
2540
2541 list_for_each_entry(d, &wl->devlist, list) {
2542 if (d->phy.possible_phymodes & phymode) {
2543 /* Ok, this device supports the PHY-mode.
2544 * Set the gmode bit. */
2545 *gmode = true;
2546 *dev = d;
2547
2548 return 0;
2549 }
2550 }
2551
2552 return -ESRCH;
2553 }
2554
2555 static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
2556 {
2557 struct ssb_device *sdev = dev->dev;
2558 u32 tmslow;
2559
2560 tmslow = ssb_read32(sdev, SSB_TMSLOW);
2561 tmslow &= ~B43legacy_TMSLOW_GMODE;
2562 tmslow |= B43legacy_TMSLOW_PHYRESET;
2563 tmslow |= SSB_TMSLOW_FGC;
2564 ssb_write32(sdev, SSB_TMSLOW, tmslow);
2565 msleep(1);
2566
2567 tmslow = ssb_read32(sdev, SSB_TMSLOW);
2568 tmslow &= ~SSB_TMSLOW_FGC;
2569 tmslow |= B43legacy_TMSLOW_PHYRESET;
2570 ssb_write32(sdev, SSB_TMSLOW, tmslow);
2571 msleep(1);
2572 }
2573
2574 /* Expects wl->mutex locked */
2575 static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
2576 unsigned int new_mode)
2577 {
2578 struct b43legacy_wldev *uninitialized_var(up_dev);
2579 struct b43legacy_wldev *down_dev;
2580 int err;
2581 bool gmode = false;
2582 int prev_status;
2583
2584 err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
2585 if (err) {
2586 b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
2587 phymode_to_string(new_mode));
2588 return err;
2589 }
2590 if ((up_dev == wl->current_dev) &&
2591 (!!wl->current_dev->phy.gmode == !!gmode))
2592 /* This device is already running. */
2593 return 0;
2594 b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
2595 phymode_to_string(new_mode));
2596 down_dev = wl->current_dev;
2597
2598 prev_status = b43legacy_status(down_dev);
2599 /* Shutdown the currently running core. */
2600 if (prev_status >= B43legacy_STAT_STARTED)
2601 b43legacy_wireless_core_stop(down_dev);
2602 if (prev_status >= B43legacy_STAT_INITIALIZED)
2603 b43legacy_wireless_core_exit(down_dev);
2604
2605 if (down_dev != up_dev)
2606 /* We switch to a different core, so we put PHY into
2607 * RESET on the old core. */
2608 b43legacy_put_phy_into_reset(down_dev);
2609
2610 /* Now start the new core. */
2611 up_dev->phy.gmode = gmode;
2612 if (prev_status >= B43legacy_STAT_INITIALIZED) {
2613 err = b43legacy_wireless_core_init(up_dev);
2614 if (err) {
2615 b43legacyerr(wl, "Fatal: Could not initialize device"
2616 " for newly selected %s-PHY mode\n",
2617 phymode_to_string(new_mode));
2618 goto init_failure;
2619 }
2620 }
2621 if (prev_status >= B43legacy_STAT_STARTED) {
2622 err = b43legacy_wireless_core_start(up_dev);
2623 if (err) {
2624 b43legacyerr(wl, "Fatal: Coult not start device for "
2625 "newly selected %s-PHY mode\n",
2626 phymode_to_string(new_mode));
2627 b43legacy_wireless_core_exit(up_dev);
2628 goto init_failure;
2629 }
2630 }
2631 B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
2632
2633 b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
2634
2635 wl->current_dev = up_dev;
2636
2637 return 0;
2638 init_failure:
2639 /* Whoops, failed to init the new core. No core is operating now. */
2640 wl->current_dev = NULL;
2641 return err;
2642 }
2643
2644 /* Write the short and long frame retry limit values. */
2645 static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
2646 unsigned int short_retry,
2647 unsigned int long_retry)
2648 {
2649 /* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
2650 * the chip-internal counter. */
2651 short_retry = min(short_retry, (unsigned int)0xF);
2652 long_retry = min(long_retry, (unsigned int)0xF);
2653
2654 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
2655 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
2656 }
2657
2658 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
2659 u32 changed)
2660 {
2661 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2662 struct b43legacy_wldev *dev;
2663 struct b43legacy_phy *phy;
2664 struct ieee80211_conf *conf = &hw->conf;
2665 unsigned long flags;
2666 unsigned int new_phymode = 0xFFFF;
2667 int antenna_tx;
2668 int err = 0;
2669
2670 antenna_tx = B43legacy_ANTENNA_DEFAULT;
2671
2672 mutex_lock(&wl->mutex);
2673 dev = wl->current_dev;
2674 phy = &dev->phy;
2675
2676 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
2677 b43legacy_set_retry_limits(dev,
2678 conf->short_frame_max_tx_count,
2679 conf->long_frame_max_tx_count);
2680 changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
2681 if (!changed)
2682 goto out_unlock_mutex;
2683
2684 /* Switch the PHY mode (if necessary). */
2685 switch (conf->channel->band) {
2686 case IEEE80211_BAND_2GHZ:
2687 if (phy->type == B43legacy_PHYTYPE_B)
2688 new_phymode = B43legacy_PHYMODE_B;
2689 else
2690 new_phymode = B43legacy_PHYMODE_G;
2691 break;
2692 default:
2693 B43legacy_WARN_ON(1);
2694 }
2695 err = b43legacy_switch_phymode(wl, new_phymode);
2696 if (err)
2697 goto out_unlock_mutex;
2698
2699 /* Disable IRQs while reconfiguring the device.
2700 * This makes it possible to drop the spinlock throughout
2701 * the reconfiguration process. */
2702 spin_lock_irqsave(&wl->irq_lock, flags);
2703 if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2704 spin_unlock_irqrestore(&wl->irq_lock, flags);
2705 goto out_unlock_mutex;
2706 }
2707 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2708 spin_unlock_irqrestore(&wl->irq_lock, flags);
2709 b43legacy_synchronize_irq(dev);
2710
2711 /* Switch to the requested channel.
2712 * The firmware takes care of races with the TX handler. */
2713 if (conf->channel->hw_value != phy->channel)
2714 b43legacy_radio_selectchannel(dev, conf->channel->hw_value, 0);
2715
2716 dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_MONITOR);
2717
2718 /* Adjust the desired TX power level. */
2719 if (conf->power_level != 0) {
2720 if (conf->power_level != phy->power_level) {
2721 phy->power_level = conf->power_level;
2722 b43legacy_phy_xmitpower(dev);
2723 }
2724 }
2725
2726 /* Antennas for RX and management frame TX. */
2727 b43legacy_mgmtframe_txantenna(dev, antenna_tx);
2728
2729 if (wl->radio_enabled != phy->radio_on) {
2730 if (wl->radio_enabled) {
2731 b43legacy_radio_turn_on(dev);
2732 b43legacyinfo(dev->wl, "Radio turned on by software\n");
2733 if (!dev->radio_hw_enable)
2734 b43legacyinfo(dev->wl, "The hardware RF-kill"
2735 " button still turns the radio"
2736 " physically off. Press the"
2737 " button to turn it on.\n");
2738 } else {
2739 b43legacy_radio_turn_off(dev, 0);
2740 b43legacyinfo(dev->wl, "Radio turned off by"
2741 " software\n");
2742 }
2743 }
2744
2745 spin_lock_irqsave(&wl->irq_lock, flags);
2746 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2747 mmiowb();
2748 spin_unlock_irqrestore(&wl->irq_lock, flags);
2749 out_unlock_mutex:
2750 mutex_unlock(&wl->mutex);
2751
2752 return err;
2753 }
2754
2755 static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
2756 {
2757 struct ieee80211_supported_band *sband =
2758 dev->wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2759 struct ieee80211_rate *rate;
2760 int i;
2761 u16 basic, direct, offset, basic_offset, rateptr;
2762
2763 for (i = 0; i < sband->n_bitrates; i++) {
2764 rate = &sband->bitrates[i];
2765
2766 if (b43legacy_is_cck_rate(rate->hw_value)) {
2767 direct = B43legacy_SHM_SH_CCKDIRECT;
2768 basic = B43legacy_SHM_SH_CCKBASIC;
2769 offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2770 offset &= 0xF;
2771 } else {
2772 direct = B43legacy_SHM_SH_OFDMDIRECT;
2773 basic = B43legacy_SHM_SH_OFDMBASIC;
2774 offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2775 offset &= 0xF;
2776 }
2777
2778 rate = ieee80211_get_response_rate(sband, brates, rate->bitrate);
2779
2780 if (b43legacy_is_cck_rate(rate->hw_value)) {
2781 basic_offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2782 basic_offset &= 0xF;
2783 } else {
2784 basic_offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2785 basic_offset &= 0xF;
2786 }
2787
2788 /*
2789 * Get the pointer that we need to point to
2790 * from the direct map
2791 */
2792 rateptr = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2793 direct + 2 * basic_offset);
2794 /* and write it to the basic map */
2795 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2796 basic + 2 * offset, rateptr);
2797 }
2798 }
2799
2800 static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
2801 struct ieee80211_vif *vif,
2802 struct ieee80211_bss_conf *conf,
2803 u32 changed)
2804 {
2805 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2806 struct b43legacy_wldev *dev;
2807 unsigned long flags;
2808
2809 mutex_lock(&wl->mutex);
2810 B43legacy_WARN_ON(wl->vif != vif);
2811
2812 dev = wl->current_dev;
2813
2814 /* Disable IRQs while reconfiguring the device.
2815 * This makes it possible to drop the spinlock throughout
2816 * the reconfiguration process. */
2817 spin_lock_irqsave(&wl->irq_lock, flags);
2818 if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2819 spin_unlock_irqrestore(&wl->irq_lock, flags);
2820 goto out_unlock_mutex;
2821 }
2822 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2823
2824 if (changed & BSS_CHANGED_BSSID) {
2825 b43legacy_synchronize_irq(dev);
2826
2827 if (conf->bssid)
2828 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
2829 else
2830 memset(wl->bssid, 0, ETH_ALEN);
2831 }
2832
2833 if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
2834 if (changed & BSS_CHANGED_BEACON &&
2835 (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2836 b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2837 b43legacy_update_templates(wl);
2838
2839 if (changed & BSS_CHANGED_BSSID)
2840 b43legacy_write_mac_bssid_templates(dev);
2841 }
2842 spin_unlock_irqrestore(&wl->irq_lock, flags);
2843
2844 b43legacy_mac_suspend(dev);
2845
2846 if (changed & BSS_CHANGED_BEACON_INT &&
2847 (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2848 b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2849 b43legacy_set_beacon_int(dev, conf->beacon_int);
2850
2851 if (changed & BSS_CHANGED_BASIC_RATES)
2852 b43legacy_update_basic_rates(dev, conf->basic_rates);
2853
2854 if (changed & BSS_CHANGED_ERP_SLOT) {
2855 if (conf->use_short_slot)
2856 b43legacy_short_slot_timing_enable(dev);
2857 else
2858 b43legacy_short_slot_timing_disable(dev);
2859 }
2860
2861 b43legacy_mac_enable(dev);
2862
2863 spin_lock_irqsave(&wl->irq_lock, flags);
2864 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2865 /* XXX: why? */
2866 mmiowb();
2867 spin_unlock_irqrestore(&wl->irq_lock, flags);
2868 out_unlock_mutex:
2869 mutex_unlock(&wl->mutex);
2870 }
2871
2872 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
2873 unsigned int changed,
2874 unsigned int *fflags,u64 multicast)
2875 {
2876 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2877 struct b43legacy_wldev *dev = wl->current_dev;
2878 unsigned long flags;
2879
2880 if (!dev) {
2881 *fflags = 0;
2882 return;
2883 }
2884
2885 spin_lock_irqsave(&wl->irq_lock, flags);
2886 *fflags &= FIF_PROMISC_IN_BSS |
2887 FIF_ALLMULTI |
2888 FIF_FCSFAIL |
2889 FIF_PLCPFAIL |
2890 FIF_CONTROL |
2891 FIF_OTHER_BSS |
2892 FIF_BCN_PRBRESP_PROMISC;
2893
2894 changed &= FIF_PROMISC_IN_BSS |
2895 FIF_ALLMULTI |
2896 FIF_FCSFAIL |
2897 FIF_PLCPFAIL |
2898 FIF_CONTROL |
2899 FIF_OTHER_BSS |
2900 FIF_BCN_PRBRESP_PROMISC;
2901
2902 wl->filter_flags = *fflags;
2903
2904 if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
2905 b43legacy_adjust_opmode(dev);
2906 spin_unlock_irqrestore(&wl->irq_lock, flags);
2907 }
2908
2909 /* Locking: wl->mutex */
2910 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
2911 {
2912 struct b43legacy_wl *wl = dev->wl;
2913 unsigned long flags;
2914 int queue_num;
2915
2916 if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
2917 return;
2918
2919 /* Disable and sync interrupts. We must do this before than
2920 * setting the status to INITIALIZED, as the interrupt handler
2921 * won't care about IRQs then. */
2922 spin_lock_irqsave(&wl->irq_lock, flags);
2923 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2924 b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
2925 spin_unlock_irqrestore(&wl->irq_lock, flags);
2926 b43legacy_synchronize_irq(dev);
2927
2928 b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
2929
2930 mutex_unlock(&wl->mutex);
2931 /* Must unlock as it would otherwise deadlock. No races here.
2932 * Cancel the possibly running self-rearming periodic work. */
2933 cancel_delayed_work_sync(&dev->periodic_work);
2934 cancel_work_sync(&wl->tx_work);
2935 mutex_lock(&wl->mutex);
2936
2937 /* Drain all TX queues. */
2938 for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2939 while (skb_queue_len(&wl->tx_queue[queue_num]))
2940 dev_kfree_skb(skb_dequeue(&wl->tx_queue[queue_num]));
2941 }
2942
2943 b43legacy_mac_suspend(dev);
2944 free_irq(dev->dev->irq, dev);
2945 b43legacydbg(wl, "Wireless interface stopped\n");
2946 }
2947
2948 /* Locking: wl->mutex */
2949 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
2950 {
2951 int err;
2952
2953 B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
2954
2955 drain_txstatus_queue(dev);
2956 err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
2957 IRQF_SHARED, KBUILD_MODNAME, dev);
2958 if (err) {
2959 b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
2960 dev->dev->irq);
2961 goto out;
2962 }
2963 /* We are ready to run. */
2964 ieee80211_wake_queues(dev->wl->hw);
2965 b43legacy_set_status(dev, B43legacy_STAT_STARTED);
2966
2967 /* Start data flow (TX/RX) */
2968 b43legacy_mac_enable(dev);
2969 b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2970
2971 /* Start maintenance work */
2972 b43legacy_periodic_tasks_setup(dev);
2973
2974 b43legacydbg(dev->wl, "Wireless interface started\n");
2975 out:
2976 return err;
2977 }
2978
2979 /* Get PHY and RADIO versioning numbers */
2980 static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
2981 {
2982 struct b43legacy_phy *phy = &dev->phy;
2983 u32 tmp;
2984 u8 analog_type;
2985 u8 phy_type;
2986 u8 phy_rev;
2987 u16 radio_manuf;
2988 u16 radio_ver;
2989 u16 radio_rev;
2990 int unsupported = 0;
2991
2992 /* Get PHY versioning */
2993 tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
2994 analog_type = (tmp & B43legacy_PHYVER_ANALOG)
2995 >> B43legacy_PHYVER_ANALOG_SHIFT;
2996 phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
2997 phy_rev = (tmp & B43legacy_PHYVER_VERSION);
2998 switch (phy_type) {
2999 case B43legacy_PHYTYPE_B:
3000 if (phy_rev != 2 && phy_rev != 4
3001 && phy_rev != 6 && phy_rev != 7)
3002 unsupported = 1;
3003 break;
3004 case B43legacy_PHYTYPE_G:
3005 if (phy_rev > 8)
3006 unsupported = 1;
3007 break;
3008 default:
3009 unsupported = 1;
3010 }
3011 if (unsupported) {
3012 b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
3013 "(Analog %u, Type %u, Revision %u)\n",
3014 analog_type, phy_type, phy_rev);
3015 return -EOPNOTSUPP;
3016 }
3017 b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
3018 analog_type, phy_type, phy_rev);
3019
3020
3021 /* Get RADIO versioning */
3022 if (dev->dev->bus->chip_id == 0x4317) {
3023 if (dev->dev->bus->chip_rev == 0)
3024 tmp = 0x3205017F;
3025 else if (dev->dev->bus->chip_rev == 1)
3026 tmp = 0x4205017F;
3027 else
3028 tmp = 0x5205017F;
3029 } else {
3030 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3031 B43legacy_RADIOCTL_ID);
3032 tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
3033 tmp <<= 16;
3034 b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3035 B43legacy_RADIOCTL_ID);
3036 tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
3037 }
3038 radio_manuf = (tmp & 0x00000FFF);
3039 radio_ver = (tmp & 0x0FFFF000) >> 12;
3040 radio_rev = (tmp & 0xF0000000) >> 28;
3041 switch (phy_type) {
3042 case B43legacy_PHYTYPE_B:
3043 if ((radio_ver & 0xFFF0) != 0x2050)
3044 unsupported = 1;
3045 break;
3046 case B43legacy_PHYTYPE_G:
3047 if (radio_ver != 0x2050)
3048 unsupported = 1;
3049 break;
3050 default:
3051 B43legacy_BUG_ON(1);
3052 }
3053 if (unsupported) {
3054 b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
3055 "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
3056 radio_manuf, radio_ver, radio_rev);
3057 return -EOPNOTSUPP;
3058 }
3059 b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
3060 " Revision %u\n", radio_manuf, radio_ver, radio_rev);
3061
3062
3063 phy->radio_manuf = radio_manuf;
3064 phy->radio_ver = radio_ver;
3065 phy->radio_rev = radio_rev;
3066
3067 phy->analog = analog_type;
3068 phy->type = phy_type;
3069 phy->rev = phy_rev;
3070
3071 return 0;
3072 }
3073
3074 static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
3075 struct b43legacy_phy *phy)
3076 {
3077 struct b43legacy_lopair *lo;
3078 int i;
3079
3080 memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3081 memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3082
3083 /* Assume the radio is enabled. If it's not enabled, the state will
3084 * immediately get fixed on the first periodic work run. */
3085 dev->radio_hw_enable = true;
3086
3087 phy->savedpctlreg = 0xFFFF;
3088 phy->aci_enable = false;
3089 phy->aci_wlan_automatic = false;
3090 phy->aci_hw_rssi = false;
3091
3092 lo = phy->_lo_pairs;
3093 if (lo)
3094 memset(lo, 0, sizeof(struct b43legacy_lopair) *
3095 B43legacy_LO_COUNT);
3096 phy->max_lb_gain = 0;
3097 phy->trsw_rx_gain = 0;
3098
3099 /* Set default attenuation values. */
3100 phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3101 phy->rfatt = b43legacy_default_radio_attenuation(dev);
3102 phy->txctl1 = b43legacy_default_txctl1(dev);
3103 phy->txpwr_offset = 0;
3104
3105 /* NRSSI */
3106 phy->nrssislope = 0;
3107 for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3108 phy->nrssi[i] = -1000;
3109 for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3110 phy->nrssi_lt[i] = i;
3111
3112 phy->lofcal = 0xFFFF;
3113 phy->initval = 0xFFFF;
3114
3115 phy->interfmode = B43legacy_INTERFMODE_NONE;
3116 phy->channel = 0xFF;
3117 }
3118
3119 static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
3120 {
3121 /* Flags */
3122 dev->dfq_valid = false;
3123
3124 /* Stats */
3125 memset(&dev->stats, 0, sizeof(dev->stats));
3126
3127 setup_struct_phy_for_init(dev, &dev->phy);
3128
3129 /* IRQ related flags */
3130 dev->irq_reason = 0;
3131 memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
3132 dev->irq_mask = B43legacy_IRQ_MASKTEMPLATE;
3133
3134 dev->mac_suspended = 1;
3135
3136 /* Noise calculation context */
3137 memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
3138 }
3139
3140 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
3141 bool idle) {
3142 u16 pu_delay = 1050;
3143
3144 if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC) || idle)
3145 pu_delay = 500;
3146 if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
3147 pu_delay = max(pu_delay, (u16)2400);
3148
3149 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3150 B43legacy_SHM_SH_SPUWKUP, pu_delay);
3151 }
3152
3153 /* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
3154 static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
3155 {
3156 u16 pretbtt;
3157
3158 /* The time value is in microseconds. */
3159 if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
3160 pretbtt = 2;
3161 else
3162 pretbtt = 250;
3163 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3164 B43legacy_SHM_SH_PRETBTT, pretbtt);
3165 b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
3166 }
3167
3168 /* Shutdown a wireless core */
3169 /* Locking: wl->mutex */
3170 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
3171 {
3172 struct b43legacy_phy *phy = &dev->phy;
3173 u32 macctl;
3174
3175 B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
3176 if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
3177 return;
3178 b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
3179
3180 /* Stop the microcode PSM. */
3181 macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
3182 macctl &= ~B43legacy_MACCTL_PSM_RUN;
3183 macctl |= B43legacy_MACCTL_PSM_JMP0;
3184 b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
3185
3186 b43legacy_leds_exit(dev);
3187 b43legacy_rng_exit(dev->wl);
3188 b43legacy_pio_free(dev);
3189 b43legacy_dma_free(dev);
3190 b43legacy_chip_exit(dev);
3191 b43legacy_radio_turn_off(dev, 1);
3192 b43legacy_switch_analog(dev, 0);
3193 if (phy->dyn_tssi_tbl)
3194 kfree(phy->tssi2dbm);
3195 kfree(phy->lo_control);
3196 phy->lo_control = NULL;
3197 if (dev->wl->current_beacon) {
3198 dev_kfree_skb_any(dev->wl->current_beacon);
3199 dev->wl->current_beacon = NULL;
3200 }
3201
3202 ssb_device_disable(dev->dev, 0);
3203 ssb_bus_may_powerdown(dev->dev->bus);
3204 }
3205
3206 static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
3207 {
3208 struct b43legacy_phy *phy = &dev->phy;
3209 int i;
3210
3211 /* Set default attenuation values. */
3212 phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3213 phy->rfatt = b43legacy_default_radio_attenuation(dev);
3214 phy->txctl1 = b43legacy_default_txctl1(dev);
3215 phy->txctl2 = 0xFFFF;
3216 phy->txpwr_offset = 0;
3217
3218 /* NRSSI */
3219 phy->nrssislope = 0;
3220 for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3221 phy->nrssi[i] = -1000;
3222 for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3223 phy->nrssi_lt[i] = i;
3224
3225 phy->lofcal = 0xFFFF;
3226 phy->initval = 0xFFFF;
3227
3228 phy->aci_enable = false;
3229 phy->aci_wlan_automatic = false;
3230 phy->aci_hw_rssi = false;
3231
3232 phy->antenna_diversity = 0xFFFF;
3233 memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3234 memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3235
3236 /* Flags */
3237 phy->calibrated = 0;
3238
3239 if (phy->_lo_pairs)
3240 memset(phy->_lo_pairs, 0,
3241 sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
3242 memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
3243 }
3244
3245 /* Initialize a wireless core */
3246 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
3247 {
3248 struct b43legacy_wl *wl = dev->wl;
3249 struct ssb_bus *bus = dev->dev->bus;
3250 struct b43legacy_phy *phy = &dev->phy;
3251 struct ssb_sprom *sprom = &dev->dev->bus->sprom;
3252 int err;
3253 u32 hf;
3254 u32 tmp;
3255
3256 B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3257
3258 err = ssb_bus_powerup(bus, 0);
3259 if (err)
3260 goto out;
3261 if (!ssb_device_is_enabled(dev->dev)) {
3262 tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
3263 b43legacy_wireless_core_reset(dev, tmp);
3264 }
3265
3266 if ((phy->type == B43legacy_PHYTYPE_B) ||
3267 (phy->type == B43legacy_PHYTYPE_G)) {
3268 phy->_lo_pairs = kzalloc(sizeof(struct b43legacy_lopair)
3269 * B43legacy_LO_COUNT,
3270 GFP_KERNEL);
3271 if (!phy->_lo_pairs)
3272 return -ENOMEM;
3273 }
3274 setup_struct_wldev_for_init(dev);
3275
3276 err = b43legacy_phy_init_tssi2dbm_table(dev);
3277 if (err)
3278 goto err_kfree_lo_control;
3279
3280 /* Enable IRQ routing to this device. */
3281 ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
3282
3283 prepare_phy_data_for_init(dev);
3284 b43legacy_phy_calibrate(dev);
3285 err = b43legacy_chip_init(dev);
3286 if (err)
3287 goto err_kfree_tssitbl;
3288 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3289 B43legacy_SHM_SH_WLCOREREV,
3290 dev->dev->id.revision);
3291 hf = b43legacy_hf_read(dev);
3292 if (phy->type == B43legacy_PHYTYPE_G) {
3293 hf |= B43legacy_HF_SYMW;
3294 if (phy->rev == 1)
3295 hf |= B43legacy_HF_GDCW;
3296 if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
3297 hf |= B43legacy_HF_OFDMPABOOST;
3298 } else if (phy->type == B43legacy_PHYTYPE_B) {
3299 hf |= B43legacy_HF_SYMW;
3300 if (phy->rev >= 2 && phy->radio_ver == 0x2050)
3301 hf &= ~B43legacy_HF_GDCW;
3302 }
3303 b43legacy_hf_write(dev, hf);
3304
3305 b43legacy_set_retry_limits(dev,
3306 B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
3307 B43legacy_DEFAULT_LONG_RETRY_LIMIT);
3308
3309 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3310 0x0044, 3);
3311 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3312 0x0046, 2);
3313
3314 /* Disable sending probe responses from firmware.
3315 * Setting the MaxTime to one usec will always trigger
3316 * a timeout, so we never send any probe resp.
3317 * A timeout of zero is infinite. */
3318 b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3319 B43legacy_SHM_SH_PRMAXTIME, 1);
3320
3321 b43legacy_rate_memory_init(dev);
3322
3323 /* Minimum Contention Window */
3324 if (phy->type == B43legacy_PHYTYPE_B)
3325 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3326 0x0003, 31);
3327 else
3328 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3329 0x0003, 15);
3330 /* Maximum Contention Window */
3331 b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3332 0x0004, 1023);
3333
3334 do {
3335 if (b43legacy_using_pio(dev))
3336 err = b43legacy_pio_init(dev);
3337 else {
3338 err = b43legacy_dma_init(dev);
3339 if (!err)
3340 b43legacy_qos_init(dev);
3341 }
3342 } while (err == -EAGAIN);
3343 if (err)
3344 goto err_chip_exit;
3345
3346 b43legacy_set_synth_pu_delay(dev, 1);
3347
3348 ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
3349 b43legacy_upload_card_macaddress(dev);
3350 b43legacy_security_init(dev);
3351 b43legacy_rng_init(wl);
3352
3353 ieee80211_wake_queues(dev->wl->hw);
3354 b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
3355
3356 b43legacy_leds_init(dev);
3357 out:
3358 return err;
3359
3360 err_chip_exit:
3361 b43legacy_chip_exit(dev);
3362 err_kfree_tssitbl:
3363 if (phy->dyn_tssi_tbl)
3364 kfree(phy->tssi2dbm);
3365 err_kfree_lo_control:
3366 kfree(phy->lo_control);
3367 phy->lo_control = NULL;
3368 ssb_bus_may_powerdown(bus);
3369 B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3370 return err;
3371 }
3372
3373 static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
3374 struct ieee80211_vif *vif)
3375 {
3376 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3377 struct b43legacy_wldev *dev;
3378 unsigned long flags;
3379 int err = -EOPNOTSUPP;
3380
3381 /* TODO: allow WDS/AP devices to coexist */
3382
3383 if (vif->type != NL80211_IFTYPE_AP &&
3384 vif->type != NL80211_IFTYPE_STATION &&
3385 vif->type != NL80211_IFTYPE_WDS &&
3386 vif->type != NL80211_IFTYPE_ADHOC)
3387 return -EOPNOTSUPP;
3388
3389 mutex_lock(&wl->mutex);
3390 if (wl->operating)
3391 goto out_mutex_unlock;
3392
3393 b43legacydbg(wl, "Adding Interface type %d\n", vif->type);
3394
3395 dev = wl->current_dev;
3396 wl->operating = true;
3397 wl->vif = vif;
3398 wl->if_type = vif->type;
3399 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
3400
3401 spin_lock_irqsave(&wl->irq_lock, flags);
3402 b43legacy_adjust_opmode(dev);
3403 b43legacy_set_pretbtt(dev);
3404 b43legacy_set_synth_pu_delay(dev, 0);
3405 b43legacy_upload_card_macaddress(dev);
3406 spin_unlock_irqrestore(&wl->irq_lock, flags);
3407
3408 err = 0;
3409 out_mutex_unlock:
3410 mutex_unlock(&wl->mutex);
3411
3412 return err;
3413 }
3414
3415 static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
3416 struct ieee80211_vif *vif)
3417 {
3418 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3419 struct b43legacy_wldev *dev = wl->current_dev;
3420 unsigned long flags;
3421
3422 b43legacydbg(wl, "Removing Interface type %d\n", vif->type);
3423
3424 mutex_lock(&wl->mutex);
3425
3426 B43legacy_WARN_ON(!wl->operating);
3427 B43legacy_WARN_ON(wl->vif != vif);
3428 wl->vif = NULL;
3429
3430 wl->operating = false;
3431
3432 spin_lock_irqsave(&wl->irq_lock, flags);
3433 b43legacy_adjust_opmode(dev);
3434 memset(wl->mac_addr, 0, ETH_ALEN);
3435 b43legacy_upload_card_macaddress(dev);
3436 spin_unlock_irqrestore(&wl->irq_lock, flags);
3437
3438 mutex_unlock(&wl->mutex);
3439 }
3440
3441 static int b43legacy_op_start(struct ieee80211_hw *hw)
3442 {
3443 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3444 struct b43legacy_wldev *dev = wl->current_dev;
3445 int did_init = 0;
3446 int err = 0;
3447
3448 /* Kill all old instance specific information to make sure
3449 * the card won't use it in the short timeframe between start
3450 * and mac80211 reconfiguring it. */
3451 memset(wl->bssid, 0, ETH_ALEN);
3452 memset(wl->mac_addr, 0, ETH_ALEN);
3453 wl->filter_flags = 0;
3454 wl->beacon0_uploaded = false;
3455 wl->beacon1_uploaded = false;
3456 wl->beacon_templates_virgin = true;
3457 wl->radio_enabled = true;
3458
3459 mutex_lock(&wl->mutex);
3460
3461 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
3462 err = b43legacy_wireless_core_init(dev);
3463 if (err)
3464 goto out_mutex_unlock;
3465 did_init = 1;
3466 }
3467
3468 if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
3469 err = b43legacy_wireless_core_start(dev);
3470 if (err) {
3471 if (did_init)
3472 b43legacy_wireless_core_exit(dev);
3473 goto out_mutex_unlock;
3474 }
3475 }
3476
3477 wiphy_rfkill_start_polling(hw->wiphy);
3478
3479 out_mutex_unlock:
3480 mutex_unlock(&wl->mutex);
3481
3482 return err;
3483 }
3484
3485 static void b43legacy_op_stop(struct ieee80211_hw *hw)
3486 {
3487 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3488 struct b43legacy_wldev *dev = wl->current_dev;
3489
3490 cancel_work_sync(&(wl->beacon_update_trigger));
3491
3492 mutex_lock(&wl->mutex);
3493 if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
3494 b43legacy_wireless_core_stop(dev);
3495 b43legacy_wireless_core_exit(dev);
3496 wl->radio_enabled = false;
3497 mutex_unlock(&wl->mutex);
3498 }
3499
3500 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
3501 struct ieee80211_sta *sta, bool set)
3502 {
3503 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3504 unsigned long flags;
3505
3506 spin_lock_irqsave(&wl->irq_lock, flags);
3507 b43legacy_update_templates(wl);
3508 spin_unlock_irqrestore(&wl->irq_lock, flags);
3509
3510 return 0;
3511 }
3512
3513 static int b43legacy_op_get_survey(struct ieee80211_hw *hw, int idx,
3514 struct survey_info *survey)
3515 {
3516 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3517 struct b43legacy_wldev *dev = wl->current_dev;
3518 struct ieee80211_conf *conf = &hw->conf;
3519
3520 if (idx != 0)
3521 return -ENOENT;
3522
3523 survey->channel = conf->channel;
3524 survey->filled = SURVEY_INFO_NOISE_DBM;
3525 survey->noise = dev->stats.link_noise;
3526
3527 return 0;
3528 }
3529
3530 static const struct ieee80211_ops b43legacy_hw_ops = {
3531 .tx = b43legacy_op_tx,
3532 .conf_tx = b43legacy_op_conf_tx,
3533 .add_interface = b43legacy_op_add_interface,
3534 .remove_interface = b43legacy_op_remove_interface,
3535 .config = b43legacy_op_dev_config,
3536 .bss_info_changed = b43legacy_op_bss_info_changed,
3537 .configure_filter = b43legacy_op_configure_filter,
3538 .get_stats = b43legacy_op_get_stats,
3539 .start = b43legacy_op_start,
3540 .stop = b43legacy_op_stop,
3541 .set_tim = b43legacy_op_beacon_set_tim,
3542 .get_survey = b43legacy_op_get_survey,
3543 .rfkill_poll = b43legacy_rfkill_poll,
3544 };
3545
3546 /* Hard-reset the chip. Do not call this directly.
3547 * Use b43legacy_controller_restart()
3548 */
3549 static void b43legacy_chip_reset(struct work_struct *work)
3550 {
3551 struct b43legacy_wldev *dev =
3552 container_of(work, struct b43legacy_wldev, restart_work);
3553 struct b43legacy_wl *wl = dev->wl;
3554 int err = 0;
3555 int prev_status;
3556
3557 mutex_lock(&wl->mutex);
3558
3559 prev_status = b43legacy_status(dev);
3560 /* Bring the device down... */
3561 if (prev_status >= B43legacy_STAT_STARTED)
3562 b43legacy_wireless_core_stop(dev);
3563 if (prev_status >= B43legacy_STAT_INITIALIZED)
3564 b43legacy_wireless_core_exit(dev);
3565
3566 /* ...and up again. */
3567 if (prev_status >= B43legacy_STAT_INITIALIZED) {
3568 err = b43legacy_wireless_core_init(dev);
3569 if (err)
3570 goto out;
3571 }
3572 if (prev_status >= B43legacy_STAT_STARTED) {
3573 err = b43legacy_wireless_core_start(dev);
3574 if (err) {
3575 b43legacy_wireless_core_exit(dev);
3576 goto out;
3577 }
3578 }
3579 out:
3580 if (err)
3581 wl->current_dev = NULL; /* Failed to init the dev. */
3582 mutex_unlock(&wl->mutex);
3583 if (err)
3584 b43legacyerr(wl, "Controller restart FAILED\n");
3585 else
3586 b43legacyinfo(wl, "Controller restarted\n");
3587 }
3588
3589 static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
3590 int have_bphy,
3591 int have_gphy)
3592 {
3593 struct ieee80211_hw *hw = dev->wl->hw;
3594 struct b43legacy_phy *phy = &dev->phy;
3595
3596 phy->possible_phymodes = 0;
3597 if (have_bphy) {
3598 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3599 &b43legacy_band_2GHz_BPHY;
3600 phy->possible_phymodes |= B43legacy_PHYMODE_B;
3601 }
3602
3603 if (have_gphy) {
3604 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3605 &b43legacy_band_2GHz_GPHY;
3606 phy->possible_phymodes |= B43legacy_PHYMODE_G;
3607 }
3608
3609 return 0;
3610 }
3611
3612 static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
3613 {
3614 /* We release firmware that late to not be required to re-request
3615 * is all the time when we reinit the core. */
3616 b43legacy_release_firmware(dev);
3617 }
3618
3619 static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
3620 {
3621 struct b43legacy_wl *wl = dev->wl;
3622 struct ssb_bus *bus = dev->dev->bus;
3623 struct pci_dev *pdev = (bus->bustype == SSB_BUSTYPE_PCI) ? bus->host_pci : NULL;
3624 int err;
3625 int have_bphy = 0;
3626 int have_gphy = 0;
3627 u32 tmp;
3628
3629 /* Do NOT do any device initialization here.
3630 * Do it in wireless_core_init() instead.
3631 * This function is for gathering basic information about the HW, only.
3632 * Also some structs may be set up here. But most likely you want to
3633 * have that in core_init(), too.
3634 */
3635
3636 err = ssb_bus_powerup(bus, 0);
3637 if (err) {
3638 b43legacyerr(wl, "Bus powerup failed\n");
3639 goto out;
3640 }
3641 /* Get the PHY type. */
3642 if (dev->dev->id.revision >= 5) {
3643 u32 tmshigh;
3644
3645 tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
3646 have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
3647 if (!have_gphy)
3648 have_bphy = 1;
3649 } else if (dev->dev->id.revision == 4)
3650 have_gphy = 1;
3651 else
3652 have_bphy = 1;
3653
3654 dev->phy.gmode = (have_gphy || have_bphy);
3655 dev->phy.radio_on = true;
3656 tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3657 b43legacy_wireless_core_reset(dev, tmp);
3658
3659 err = b43legacy_phy_versioning(dev);
3660 if (err)
3661 goto err_powerdown;
3662 /* Check if this device supports multiband. */
3663 if (!pdev ||
3664 (pdev->device != 0x4312 &&
3665 pdev->device != 0x4319 &&
3666 pdev->device != 0x4324)) {
3667 /* No multiband support. */
3668 have_bphy = 0;
3669 have_gphy = 0;
3670 switch (dev->phy.type) {
3671 case B43legacy_PHYTYPE_B:
3672 have_bphy = 1;
3673 break;
3674 case B43legacy_PHYTYPE_G:
3675 have_gphy = 1;
3676 break;
3677 default:
3678 B43legacy_BUG_ON(1);
3679 }
3680 }
3681 dev->phy.gmode = (have_gphy || have_bphy);
3682 tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3683 b43legacy_wireless_core_reset(dev, tmp);
3684
3685 err = b43legacy_validate_chipaccess(dev);
3686 if (err)
3687 goto err_powerdown;
3688 err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
3689 if (err)
3690 goto err_powerdown;
3691
3692 /* Now set some default "current_dev" */
3693 if (!wl->current_dev)
3694 wl->current_dev = dev;
3695 INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
3696
3697 b43legacy_radio_turn_off(dev, 1);
3698 b43legacy_switch_analog(dev, 0);
3699 ssb_device_disable(dev->dev, 0);
3700 ssb_bus_may_powerdown(bus);
3701
3702 out:
3703 return err;
3704
3705 err_powerdown:
3706 ssb_bus_may_powerdown(bus);
3707 return err;
3708 }
3709
3710 static void b43legacy_one_core_detach(struct ssb_device *dev)
3711 {
3712 struct b43legacy_wldev *wldev;
3713 struct b43legacy_wl *wl;
3714
3715 /* Do not cancel ieee80211-workqueue based work here.
3716 * See comment in b43legacy_remove(). */
3717
3718 wldev = ssb_get_drvdata(dev);
3719 wl = wldev->wl;
3720 b43legacy_debugfs_remove_device(wldev);
3721 b43legacy_wireless_core_detach(wldev);
3722 list_del(&wldev->list);
3723 wl->nr_devs--;
3724 ssb_set_drvdata(dev, NULL);
3725 kfree(wldev);
3726 }
3727
3728 static int b43legacy_one_core_attach(struct ssb_device *dev,
3729 struct b43legacy_wl *wl)
3730 {
3731 struct b43legacy_wldev *wldev;
3732 int err = -ENOMEM;
3733
3734 wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
3735 if (!wldev)
3736 goto out;
3737
3738 wldev->dev = dev;
3739 wldev->wl = wl;
3740 b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
3741 wldev->bad_frames_preempt = modparam_bad_frames_preempt;
3742 tasklet_init(&wldev->isr_tasklet,
3743 (void (*)(unsigned long))b43legacy_interrupt_tasklet,
3744 (unsigned long)wldev);
3745 if (modparam_pio)
3746 wldev->__using_pio = true;
3747 INIT_LIST_HEAD(&wldev->list);
3748
3749 err = b43legacy_wireless_core_attach(wldev);
3750 if (err)
3751 goto err_kfree_wldev;
3752
3753 list_add(&wldev->list, &wl->devlist);
3754 wl->nr_devs++;
3755 ssb_set_drvdata(dev, wldev);
3756 b43legacy_debugfs_add_device(wldev);
3757 out:
3758 return err;
3759
3760 err_kfree_wldev:
3761 kfree(wldev);
3762 return err;
3763 }
3764
3765 static void b43legacy_sprom_fixup(struct ssb_bus *bus)
3766 {
3767 /* boardflags workarounds */
3768 if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
3769 bus->boardinfo.type == 0x4E &&
3770 bus->boardinfo.rev > 0x40)
3771 bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
3772 }
3773
3774 static void b43legacy_wireless_exit(struct ssb_device *dev,
3775 struct b43legacy_wl *wl)
3776 {
3777 struct ieee80211_hw *hw = wl->hw;
3778
3779 ssb_set_devtypedata(dev, NULL);
3780 ieee80211_free_hw(hw);
3781 }
3782
3783 static int b43legacy_wireless_init(struct ssb_device *dev)
3784 {
3785 struct ssb_sprom *sprom = &dev->bus->sprom;
3786 struct ieee80211_hw *hw;
3787 struct b43legacy_wl *wl;
3788 int err = -ENOMEM;
3789 int queue_num;
3790
3791 b43legacy_sprom_fixup(dev->bus);
3792
3793 hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
3794 if (!hw) {
3795 b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
3796 goto out;
3797 }
3798
3799 /* fill hw info */
3800 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
3801 IEEE80211_HW_SIGNAL_DBM;
3802 hw->wiphy->interface_modes =
3803 BIT(NL80211_IFTYPE_AP) |
3804 BIT(NL80211_IFTYPE_STATION) |
3805 BIT(NL80211_IFTYPE_WDS) |
3806 BIT(NL80211_IFTYPE_ADHOC);
3807 hw->queues = 1; /* FIXME: hardware has more queues */
3808 hw->max_rates = 2;
3809 SET_IEEE80211_DEV(hw, dev->dev);
3810 if (is_valid_ether_addr(sprom->et1mac))
3811 SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
3812 else
3813 SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
3814
3815 /* Get and initialize struct b43legacy_wl */
3816 wl = hw_to_b43legacy_wl(hw);
3817 memset(wl, 0, sizeof(*wl));
3818 wl->hw = hw;
3819 spin_lock_init(&wl->irq_lock);
3820 spin_lock_init(&wl->leds_lock);
3821 mutex_init(&wl->mutex);
3822 INIT_LIST_HEAD(&wl->devlist);
3823 INIT_WORK(&wl->beacon_update_trigger, b43legacy_beacon_update_trigger_work);
3824 INIT_WORK(&wl->tx_work, b43legacy_tx_work);
3825
3826 /* Initialize queues and flags. */
3827 for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
3828 skb_queue_head_init(&wl->tx_queue[queue_num]);
3829 wl->tx_queue_stopped[queue_num] = 0;
3830 }
3831
3832 ssb_set_devtypedata(dev, wl);
3833 b43legacyinfo(wl, "Broadcom %04X WLAN found (core revision %u)\n",
3834 dev->bus->chip_id, dev->id.revision);
3835 err = 0;
3836 out:
3837 return err;
3838 }
3839
3840 static int b43legacy_probe(struct ssb_device *dev,
3841 const struct ssb_device_id *id)
3842 {
3843 struct b43legacy_wl *wl;
3844 int err;
3845 int first = 0;
3846
3847 wl = ssb_get_devtypedata(dev);
3848 if (!wl) {
3849 /* Probing the first core - setup common struct b43legacy_wl */
3850 first = 1;
3851 err = b43legacy_wireless_init(dev);
3852 if (err)
3853 goto out;
3854 wl = ssb_get_devtypedata(dev);
3855 B43legacy_WARN_ON(!wl);
3856 }
3857 err = b43legacy_one_core_attach(dev, wl);
3858 if (err)
3859 goto err_wireless_exit;
3860
3861 if (first) {
3862 err = ieee80211_register_hw(wl->hw);
3863 if (err)
3864 goto err_one_core_detach;
3865 }
3866
3867 out:
3868 return err;
3869
3870 err_one_core_detach:
3871 b43legacy_one_core_detach(dev);
3872 err_wireless_exit:
3873 if (first)
3874 b43legacy_wireless_exit(dev, wl);
3875 return err;
3876 }
3877
3878 static void b43legacy_remove(struct ssb_device *dev)
3879 {
3880 struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
3881 struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3882
3883 /* We must cancel any work here before unregistering from ieee80211,
3884 * as the ieee80211 unreg will destroy the workqueue. */
3885 cancel_work_sync(&wldev->restart_work);
3886
3887 B43legacy_WARN_ON(!wl);
3888 if (wl->current_dev == wldev)
3889 ieee80211_unregister_hw(wl->hw);
3890
3891 b43legacy_one_core_detach(dev);
3892
3893 if (list_empty(&wl->devlist))
3894 /* Last core on the chip unregistered.
3895 * We can destroy common struct b43legacy_wl.
3896 */
3897 b43legacy_wireless_exit(dev, wl);
3898 }
3899
3900 /* Perform a hardware reset. This can be called from any context. */
3901 void b43legacy_controller_restart(struct b43legacy_wldev *dev,
3902 const char *reason)
3903 {
3904 /* Must avoid requeueing, if we are in shutdown. */
3905 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
3906 return;
3907 b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
3908 ieee80211_queue_work(dev->wl->hw, &dev->restart_work);
3909 }
3910
3911 #ifdef CONFIG_PM
3912
3913 static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
3914 {
3915 struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3916 struct b43legacy_wl *wl = wldev->wl;
3917
3918 b43legacydbg(wl, "Suspending...\n");
3919
3920 mutex_lock(&wl->mutex);
3921 wldev->suspend_init_status = b43legacy_status(wldev);
3922 if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
3923 b43legacy_wireless_core_stop(wldev);
3924 if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
3925 b43legacy_wireless_core_exit(wldev);
3926 mutex_unlock(&wl->mutex);
3927
3928 b43legacydbg(wl, "Device suspended.\n");
3929
3930 return 0;
3931 }
3932
3933 static int b43legacy_resume(struct ssb_device *dev)
3934 {
3935 struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3936 struct b43legacy_wl *wl = wldev->wl;
3937 int err = 0;
3938
3939 b43legacydbg(wl, "Resuming...\n");
3940
3941 mutex_lock(&wl->mutex);
3942 if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
3943 err = b43legacy_wireless_core_init(wldev);
3944 if (err) {
3945 b43legacyerr(wl, "Resume failed at core init\n");
3946 goto out;
3947 }
3948 }
3949 if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
3950 err = b43legacy_wireless_core_start(wldev);
3951 if (err) {
3952 b43legacy_wireless_core_exit(wldev);
3953 b43legacyerr(wl, "Resume failed at core start\n");
3954 goto out;
3955 }
3956 }
3957
3958 b43legacydbg(wl, "Device resumed.\n");
3959 out:
3960 mutex_unlock(&wl->mutex);
3961 return err;
3962 }
3963
3964 #else /* CONFIG_PM */
3965 # define b43legacy_suspend NULL
3966 # define b43legacy_resume NULL
3967 #endif /* CONFIG_PM */
3968
3969 static struct ssb_driver b43legacy_ssb_driver = {
3970 .name = KBUILD_MODNAME,
3971 .id_table = b43legacy_ssb_tbl,
3972 .probe = b43legacy_probe,
3973 .remove = b43legacy_remove,
3974 .suspend = b43legacy_suspend,
3975 .resume = b43legacy_resume,
3976 };
3977
3978 static void b43legacy_print_driverinfo(void)
3979 {
3980 const char *feat_pci = "", *feat_leds = "",
3981 *feat_pio = "", *feat_dma = "";
3982
3983 #ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
3984 feat_pci = "P";
3985 #endif
3986 #ifdef CONFIG_B43LEGACY_LEDS
3987 feat_leds = "L";
3988 #endif
3989 #ifdef CONFIG_B43LEGACY_PIO
3990 feat_pio = "I";
3991 #endif
3992 #ifdef CONFIG_B43LEGACY_DMA
3993 feat_dma = "D";
3994 #endif
3995 printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
3996 "[ Features: %s%s%s%s ]\n",
3997 feat_pci, feat_leds, feat_pio, feat_dma);
3998 }
3999
4000 static int __init b43legacy_init(void)
4001 {
4002 int err;
4003
4004 b43legacy_debugfs_init();
4005
4006 err = ssb_driver_register(&b43legacy_ssb_driver);
4007 if (err)
4008 goto err_dfs_exit;
4009
4010 b43legacy_print_driverinfo();
4011
4012 return err;
4013
4014 err_dfs_exit:
4015 b43legacy_debugfs_exit();
4016 return err;
4017 }
4018
4019 static void __exit b43legacy_exit(void)
4020 {
4021 ssb_driver_unregister(&b43legacy_ssb_driver);
4022 b43legacy_debugfs_exit();
4023 }
4024
4025 module_init(b43legacy_init)
4026 module_exit(b43legacy_exit)
Linux with added FPC-III support