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 
b43legacy_ratelimit(struct b43legacy_wl * wl)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 
b43legacyinfo(struct b43legacy_wl * wl,const char * fmt,...)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 
b43legacyerr(struct b43legacy_wl * wl,const char * fmt,...)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 
b43legacywarn(struct b43legacy_wl * wl,const char * fmt,...)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
b43legacydbg(struct b43legacy_wl * wl,const char * fmt,...)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 
b43legacy_ram_write(struct b43legacy_wldev * dev,u16 offset,u32 val)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
b43legacy_shm_control_word(struct b43legacy_wldev * dev,u16 routing,u16 offset)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 
b43legacy_shm_read32(struct b43legacy_wldev * dev,u16 routing,u16 offset)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 
b43legacy_shm_read16(struct b43legacy_wldev * dev,u16 routing,u16 offset)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 
b43legacy_shm_write32(struct b43legacy_wldev * dev,u16 routing,u16 offset,u32 value)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 
b43legacy_shm_write16(struct b43legacy_wldev * dev,u16 routing,u16 offset,u16 value)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 */
b43legacy_hf_read(struct b43legacy_wldev * dev)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 */
b43legacy_hf_write(struct b43legacy_wldev * dev,u32 value)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 
b43legacy_tsf_read(struct b43legacy_wldev * dev,u64 * tsf)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 
b43legacy_time_lock(struct b43legacy_wldev * dev)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 
b43legacy_time_unlock(struct b43legacy_wldev * dev)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 
b43legacy_tsf_write_locked(struct b43legacy_wldev * dev,u64 tsf)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 
b43legacy_tsf_write(struct b43legacy_wldev * dev,u64 tsf)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
b43legacy_macfilter_set(struct b43legacy_wldev * dev,u16 offset,const u8 * mac)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 
b43legacy_write_mac_bssid_templates(struct b43legacy_wldev * dev)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 
b43legacy_upload_card_macaddress(struct b43legacy_wldev * dev)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 
b43legacy_set_slot_time(struct b43legacy_wldev * dev,u16 slot_time)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 
b43legacy_short_slot_timing_enable(struct b43legacy_wldev * dev)601 static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
602 {
603 	b43legacy_set_slot_time(dev, 9);
604 }
605 
b43legacy_short_slot_timing_disable(struct b43legacy_wldev * dev)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  */
b43legacy_synchronize_irq(struct b43legacy_wldev * dev)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  */
b43legacy_dummy_transmission(struct b43legacy_wldev * dev)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 */
b43legacy_switch_analog(struct b43legacy_wldev * dev,int on)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 
b43legacy_wireless_core_reset(struct b43legacy_wldev * dev,u32 flags)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 
handle_irq_transmit_status(struct b43legacy_wldev * dev)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 
drain_txstatus_queue(struct b43legacy_wldev * dev)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 
b43legacy_jssi_read(struct b43legacy_wldev * dev)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 
b43legacy_jssi_write(struct b43legacy_wldev * dev,u32 jssi)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 
b43legacy_generate_noise_sample(struct b43legacy_wldev * dev)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 
b43legacy_calculate_link_quality(struct b43legacy_wldev * dev)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 
handle_irq_noise(struct b43legacy_wldev * dev)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 
handle_irq_tbtt_indication(struct b43legacy_wldev * dev)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 
handle_irq_atim_end(struct b43legacy_wldev * dev)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 
handle_irq_pmq(struct b43legacy_wldev * dev)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 
b43legacy_write_template_common(struct b43legacy_wldev * dev,const u8 * data,u16 size,u16 ram_offset,u16 shm_size_offset,u8 rate)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. */
b43legacy_antenna_to_phyctl(int antenna)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 
b43legacy_write_beacon_template(struct b43legacy_wldev * dev,u16 ram_offset,u16 shm_size_offset)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 
b43legacy_write_probe_resp_plcp(struct b43legacy_wldev * dev,u16 shm_offset,u16 size,struct ieee80211_rate * rate)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  */
b43legacy_generate_probe_resp(struct b43legacy_wldev * dev,u16 * dest_size,struct ieee80211_rate * rate)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 
b43legacy_write_probe_resp_template(struct b43legacy_wldev * dev,u16 ram_offset,u16 shm_size_offset,struct ieee80211_rate * rate)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 
b43legacy_upload_beacon0(struct b43legacy_wldev * dev)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 
b43legacy_upload_beacon1(struct b43legacy_wldev * dev)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 
handle_irq_beacon(struct b43legacy_wldev * dev)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 
b43legacy_beacon_update_trigger_work(struct work_struct * work)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. */
b43legacy_update_templates(struct b43legacy_wl * wl)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 
b43legacy_set_beacon_int(struct b43legacy_wldev * dev,u16 beacon_int)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 
handle_irq_ucode_debug(struct b43legacy_wldev * dev)1300 static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
1301 {
1302 }
1303 
1304 /* Interrupt handler bottom-half */
b43legacy_interrupt_tasklet(struct b43legacy_wldev * dev)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 
pio_irq_workaround(struct b43legacy_wldev * dev,u16 base,int queueidx)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 
b43legacy_interrupt_ack(struct b43legacy_wldev * dev,u32 reason)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 */
b43legacy_interrupt_handler(int irq,void * dev_id)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 
b43legacy_release_firmware(struct b43legacy_wldev * dev)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 
b43legacy_print_fw_helptext(struct b43legacy_wl * wl)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 
b43legacy_fw_cb(const struct firmware * firmware,void * context)1514 static void b43legacy_fw_cb(const struct firmware *firmware, void *context)
1515 {
1516 	struct b43legacy_wldev *dev = context;
1517 
1518 	dev->fwp = firmware;
1519 	complete(&dev->fw_load_complete);
1520 }
1521 
do_request_fw(struct b43legacy_wldev * dev,const char * name,const struct firmware ** fw,bool async)1522 static int do_request_fw(struct b43legacy_wldev *dev,
1523 			 const char *name,
1524 			 const struct firmware **fw, bool async)
1525 {
1526 	char path[sizeof(modparam_fwpostfix) + 32];
1527 	struct b43legacy_fw_header *hdr;
1528 	u32 size;
1529 	int err;
1530 
1531 	if (!name)
1532 		return 0;
1533 
1534 	snprintf(path, ARRAY_SIZE(path),
1535 		 "b43legacy%s/%s.fw",
1536 		 modparam_fwpostfix, name);
1537 	b43legacyinfo(dev->wl, "Loading firmware %s\n", path);
1538 	if (async) {
1539 		init_completion(&dev->fw_load_complete);
1540 		err = request_firmware_nowait(THIS_MODULE, 1, path,
1541 					      dev->dev->dev, GFP_KERNEL,
1542 					      dev, b43legacy_fw_cb);
1543 		if (err) {
1544 			b43legacyerr(dev->wl, "Unable to load firmware\n");
1545 			return err;
1546 		}
1547 		/* stall here until fw ready */
1548 		wait_for_completion(&dev->fw_load_complete);
1549 		if (!dev->fwp)
1550 			err = -EINVAL;
1551 		*fw = dev->fwp;
1552 	} else {
1553 		err = request_firmware(fw, path, dev->dev->dev);
1554 	}
1555 	if (err) {
1556 		b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
1557 		       "or load failed.\n", path);
1558 		return err;
1559 	}
1560 	if ((*fw)->size < sizeof(struct b43legacy_fw_header))
1561 		goto err_format;
1562 	hdr = (struct b43legacy_fw_header *)((*fw)->data);
1563 	switch (hdr->type) {
1564 	case B43legacy_FW_TYPE_UCODE:
1565 	case B43legacy_FW_TYPE_PCM:
1566 		size = be32_to_cpu(hdr->size);
1567 		if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
1568 			goto err_format;
1569 		/* fallthrough */
1570 	case B43legacy_FW_TYPE_IV:
1571 		if (hdr->ver != 1)
1572 			goto err_format;
1573 		break;
1574 	default:
1575 		goto err_format;
1576 	}
1577 
1578 	return err;
1579 
1580 err_format:
1581 	b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
1582 	return -EPROTO;
1583 }
1584 
1585 static int b43legacy_one_core_attach(struct ssb_device *dev,
1586 				     struct b43legacy_wl *wl);
1587 static void b43legacy_one_core_detach(struct ssb_device *dev);
1588 
b43legacy_request_firmware(struct work_struct * work)1589 static void b43legacy_request_firmware(struct work_struct *work)
1590 {
1591 	struct b43legacy_wl *wl = container_of(work,
1592 				  struct b43legacy_wl, firmware_load);
1593 	struct b43legacy_wldev *dev = wl->current_dev;
1594 	struct b43legacy_firmware *fw = &dev->fw;
1595 	const u8 rev = dev->dev->id.revision;
1596 	const char *filename;
1597 	int err;
1598 
1599 	if (!fw->ucode) {
1600 		if (rev == 2)
1601 			filename = "ucode2";
1602 		else if (rev == 4)
1603 			filename = "ucode4";
1604 		else
1605 			filename = "ucode5";
1606 		err = do_request_fw(dev, filename, &fw->ucode, true);
1607 		if (err)
1608 			goto err_load;
1609 	}
1610 	if (!fw->pcm) {
1611 		if (rev < 5)
1612 			filename = "pcm4";
1613 		else
1614 			filename = "pcm5";
1615 		err = do_request_fw(dev, filename, &fw->pcm, false);
1616 		if (err)
1617 			goto err_load;
1618 	}
1619 	if (!fw->initvals) {
1620 		switch (dev->phy.type) {
1621 		case B43legacy_PHYTYPE_B:
1622 		case B43legacy_PHYTYPE_G:
1623 			if ((rev >= 5) && (rev <= 10))
1624 				filename = "b0g0initvals5";
1625 			else if (rev == 2 || rev == 4)
1626 				filename = "b0g0initvals2";
1627 			else
1628 				goto err_no_initvals;
1629 			break;
1630 		default:
1631 			goto err_no_initvals;
1632 		}
1633 		err = do_request_fw(dev, filename, &fw->initvals, false);
1634 		if (err)
1635 			goto err_load;
1636 	}
1637 	if (!fw->initvals_band) {
1638 		switch (dev->phy.type) {
1639 		case B43legacy_PHYTYPE_B:
1640 		case B43legacy_PHYTYPE_G:
1641 			if ((rev >= 5) && (rev <= 10))
1642 				filename = "b0g0bsinitvals5";
1643 			else if (rev >= 11)
1644 				filename = NULL;
1645 			else if (rev == 2 || rev == 4)
1646 				filename = NULL;
1647 			else
1648 				goto err_no_initvals;
1649 			break;
1650 		default:
1651 			goto err_no_initvals;
1652 		}
1653 		err = do_request_fw(dev, filename, &fw->initvals_band, false);
1654 		if (err)
1655 			goto err_load;
1656 	}
1657 	err = ieee80211_register_hw(wl->hw);
1658 	if (err)
1659 		goto err_one_core_detach;
1660 	return;
1661 
1662 err_one_core_detach:
1663 	b43legacy_one_core_detach(dev->dev);
1664 	goto error;
1665 
1666 err_load:
1667 	b43legacy_print_fw_helptext(dev->wl);
1668 	goto error;
1669 
1670 err_no_initvals:
1671 	err = -ENODEV;
1672 	b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
1673 	       "core rev %u\n", dev->phy.type, rev);
1674 	goto error;
1675 
1676 error:
1677 	b43legacy_release_firmware(dev);
1678 	return;
1679 }
1680 
b43legacy_upload_microcode(struct b43legacy_wldev * dev)1681 static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
1682 {
1683 	struct wiphy *wiphy = dev->wl->hw->wiphy;
1684 	const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1685 	const __be32 *data;
1686 	unsigned int i;
1687 	unsigned int len;
1688 	u16 fwrev;
1689 	u16 fwpatch;
1690 	u16 fwdate;
1691 	u16 fwtime;
1692 	u32 tmp, macctl;
1693 	int err = 0;
1694 
1695 	/* Jump the microcode PSM to offset 0 */
1696 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1697 	B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
1698 	macctl |= B43legacy_MACCTL_PSM_JMP0;
1699 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1700 	/* Zero out all microcode PSM registers and shared memory. */
1701 	for (i = 0; i < 64; i++)
1702 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
1703 	for (i = 0; i < 4096; i += 2)
1704 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);
1705 
1706 	/* Upload Microcode. */
1707 	data = (__be32 *) (dev->fw.ucode->data + hdr_len);
1708 	len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
1709 	b43legacy_shm_control_word(dev,
1710 				   B43legacy_SHM_UCODE |
1711 				   B43legacy_SHM_AUTOINC_W,
1712 				   0x0000);
1713 	for (i = 0; i < len; i++) {
1714 		b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1715 				    be32_to_cpu(data[i]));
1716 		udelay(10);
1717 	}
1718 
1719 	if (dev->fw.pcm) {
1720 		/* Upload PCM data. */
1721 		data = (__be32 *) (dev->fw.pcm->data + hdr_len);
1722 		len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
1723 		b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
1724 		b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
1725 		/* No need for autoinc bit in SHM_HW */
1726 		b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
1727 		for (i = 0; i < len; i++) {
1728 			b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1729 					  be32_to_cpu(data[i]));
1730 			udelay(10);
1731 		}
1732 	}
1733 
1734 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1735 			  B43legacy_IRQ_ALL);
1736 
1737 	/* Start the microcode PSM */
1738 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1739 	macctl &= ~B43legacy_MACCTL_PSM_JMP0;
1740 	macctl |= B43legacy_MACCTL_PSM_RUN;
1741 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1742 
1743 	/* Wait for the microcode to load and respond */
1744 	i = 0;
1745 	while (1) {
1746 		tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1747 		if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
1748 			break;
1749 		i++;
1750 		if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
1751 			b43legacyerr(dev->wl, "Microcode not responding\n");
1752 			b43legacy_print_fw_helptext(dev->wl);
1753 			err = -ENODEV;
1754 			goto error;
1755 		}
1756 		msleep_interruptible(50);
1757 		if (signal_pending(current)) {
1758 			err = -EINTR;
1759 			goto error;
1760 		}
1761 	}
1762 	/* dummy read follows */
1763 	b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1764 
1765 	/* Get and check the revisions. */
1766 	fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1767 				     B43legacy_SHM_SH_UCODEREV);
1768 	fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1769 				       B43legacy_SHM_SH_UCODEPATCH);
1770 	fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1771 				      B43legacy_SHM_SH_UCODEDATE);
1772 	fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1773 				      B43legacy_SHM_SH_UCODETIME);
1774 
1775 	if (fwrev > 0x128) {
1776 		b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
1777 			     " Only firmware from binary drivers version 3.x"
1778 			     " is supported. You must change your firmware"
1779 			     " files.\n");
1780 		b43legacy_print_fw_helptext(dev->wl);
1781 		err = -EOPNOTSUPP;
1782 		goto error;
1783 	}
1784 	b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
1785 		      "(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
1786 		      (fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
1787 		      (fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
1788 		      fwtime & 0x1F);
1789 
1790 	dev->fw.rev = fwrev;
1791 	dev->fw.patch = fwpatch;
1792 
1793 	snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "%u.%u",
1794 			dev->fw.rev, dev->fw.patch);
1795 	wiphy->hw_version = dev->dev->id.coreid;
1796 
1797 	return 0;
1798 
1799 error:
1800 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1801 	macctl &= ~B43legacy_MACCTL_PSM_RUN;
1802 	macctl |= B43legacy_MACCTL_PSM_JMP0;
1803 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1804 
1805 	return err;
1806 }
1807 
b43legacy_write_initvals(struct b43legacy_wldev * dev,const struct b43legacy_iv * ivals,size_t count,size_t array_size)1808 static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
1809 				    const struct b43legacy_iv *ivals,
1810 				    size_t count,
1811 				    size_t array_size)
1812 {
1813 	const struct b43legacy_iv *iv;
1814 	u16 offset;
1815 	size_t i;
1816 	bool bit32;
1817 
1818 	BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
1819 	iv = ivals;
1820 	for (i = 0; i < count; i++) {
1821 		if (array_size < sizeof(iv->offset_size))
1822 			goto err_format;
1823 		array_size -= sizeof(iv->offset_size);
1824 		offset = be16_to_cpu(iv->offset_size);
1825 		bit32 = !!(offset & B43legacy_IV_32BIT);
1826 		offset &= B43legacy_IV_OFFSET_MASK;
1827 		if (offset >= 0x1000)
1828 			goto err_format;
1829 		if (bit32) {
1830 			u32 value;
1831 
1832 			if (array_size < sizeof(iv->data.d32))
1833 				goto err_format;
1834 			array_size -= sizeof(iv->data.d32);
1835 
1836 			value = get_unaligned_be32(&iv->data.d32);
1837 			b43legacy_write32(dev, offset, value);
1838 
1839 			iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1840 							sizeof(__be16) +
1841 							sizeof(__be32));
1842 		} else {
1843 			u16 value;
1844 
1845 			if (array_size < sizeof(iv->data.d16))
1846 				goto err_format;
1847 			array_size -= sizeof(iv->data.d16);
1848 
1849 			value = be16_to_cpu(iv->data.d16);
1850 			b43legacy_write16(dev, offset, value);
1851 
1852 			iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1853 							sizeof(__be16) +
1854 							sizeof(__be16));
1855 		}
1856 	}
1857 	if (array_size)
1858 		goto err_format;
1859 
1860 	return 0;
1861 
1862 err_format:
1863 	b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
1864 	b43legacy_print_fw_helptext(dev->wl);
1865 
1866 	return -EPROTO;
1867 }
1868 
b43legacy_upload_initvals(struct b43legacy_wldev * dev)1869 static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
1870 {
1871 	const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1872 	const struct b43legacy_fw_header *hdr;
1873 	struct b43legacy_firmware *fw = &dev->fw;
1874 	const struct b43legacy_iv *ivals;
1875 	size_t count;
1876 	int err;
1877 
1878 	hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
1879 	ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
1880 	count = be32_to_cpu(hdr->size);
1881 	err = b43legacy_write_initvals(dev, ivals, count,
1882 				 fw->initvals->size - hdr_len);
1883 	if (err)
1884 		goto out;
1885 	if (fw->initvals_band) {
1886 		hdr = (const struct b43legacy_fw_header *)
1887 		      (fw->initvals_band->data);
1888 		ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
1889 			+ hdr_len);
1890 		count = be32_to_cpu(hdr->size);
1891 		err = b43legacy_write_initvals(dev, ivals, count,
1892 					 fw->initvals_band->size - hdr_len);
1893 		if (err)
1894 			goto out;
1895 	}
1896 out:
1897 
1898 	return err;
1899 }
1900 
1901 /* Initialize the GPIOs
1902  * http://bcm-specs.sipsolutions.net/GPIO
1903  */
b43legacy_gpio_init(struct b43legacy_wldev * dev)1904 static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
1905 {
1906 	struct ssb_bus *bus = dev->dev->bus;
1907 	struct ssb_device *gpiodev, *pcidev = NULL;
1908 	u32 mask;
1909 	u32 set;
1910 
1911 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1912 			  b43legacy_read32(dev,
1913 			  B43legacy_MMIO_MACCTL)
1914 			  & 0xFFFF3FFF);
1915 
1916 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1917 			  b43legacy_read16(dev,
1918 			  B43legacy_MMIO_GPIO_MASK)
1919 			  | 0x000F);
1920 
1921 	mask = 0x0000001F;
1922 	set = 0x0000000F;
1923 	if (dev->dev->bus->chip_id == 0x4301) {
1924 		mask |= 0x0060;
1925 		set |= 0x0060;
1926 	}
1927 	if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
1928 		b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1929 				  b43legacy_read16(dev,
1930 				  B43legacy_MMIO_GPIO_MASK)
1931 				  | 0x0200);
1932 		mask |= 0x0200;
1933 		set |= 0x0200;
1934 	}
1935 	if (dev->dev->id.revision >= 2)
1936 		mask  |= 0x0010; /* FIXME: This is redundant. */
1937 
1938 #ifdef CONFIG_SSB_DRIVER_PCICORE
1939 	pcidev = bus->pcicore.dev;
1940 #endif
1941 	gpiodev = bus->chipco.dev ? : pcidev;
1942 	if (!gpiodev)
1943 		return 0;
1944 	ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
1945 		    (ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
1946 		     & mask) | set);
1947 
1948 	return 0;
1949 }
1950 
1951 /* Turn off all GPIO stuff. Call this on module unload, for example. */
b43legacy_gpio_cleanup(struct b43legacy_wldev * dev)1952 static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
1953 {
1954 	struct ssb_bus *bus = dev->dev->bus;
1955 	struct ssb_device *gpiodev, *pcidev = NULL;
1956 
1957 #ifdef CONFIG_SSB_DRIVER_PCICORE
1958 	pcidev = bus->pcicore.dev;
1959 #endif
1960 	gpiodev = bus->chipco.dev ? : pcidev;
1961 	if (!gpiodev)
1962 		return;
1963 	ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
1964 }
1965 
1966 /* http://bcm-specs.sipsolutions.net/EnableMac */
b43legacy_mac_enable(struct b43legacy_wldev * dev)1967 void b43legacy_mac_enable(struct b43legacy_wldev *dev)
1968 {
1969 	dev->mac_suspended--;
1970 	B43legacy_WARN_ON(dev->mac_suspended < 0);
1971 	B43legacy_WARN_ON(irqs_disabled());
1972 	if (dev->mac_suspended == 0) {
1973 		b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1974 				  b43legacy_read32(dev,
1975 				  B43legacy_MMIO_MACCTL)
1976 				  | B43legacy_MACCTL_ENABLED);
1977 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1978 				  B43legacy_IRQ_MAC_SUSPENDED);
1979 		/* the next two are dummy reads */
1980 		b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1981 		b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1982 		b43legacy_power_saving_ctl_bits(dev, -1, -1);
1983 
1984 		/* Re-enable IRQs. */
1985 		spin_lock_irq(&dev->wl->irq_lock);
1986 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
1987 				  dev->irq_mask);
1988 		spin_unlock_irq(&dev->wl->irq_lock);
1989 	}
1990 }
1991 
1992 /* http://bcm-specs.sipsolutions.net/SuspendMAC */
b43legacy_mac_suspend(struct b43legacy_wldev * dev)1993 void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
1994 {
1995 	int i;
1996 	u32 tmp;
1997 
1998 	might_sleep();
1999 	B43legacy_WARN_ON(irqs_disabled());
2000 	B43legacy_WARN_ON(dev->mac_suspended < 0);
2001 
2002 	if (dev->mac_suspended == 0) {
2003 		/* Mask IRQs before suspending MAC. Otherwise
2004 		 * the MAC stays busy and won't suspend. */
2005 		spin_lock_irq(&dev->wl->irq_lock);
2006 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2007 		spin_unlock_irq(&dev->wl->irq_lock);
2008 		b43legacy_synchronize_irq(dev);
2009 
2010 		b43legacy_power_saving_ctl_bits(dev, -1, 1);
2011 		b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
2012 				  b43legacy_read32(dev,
2013 				  B43legacy_MMIO_MACCTL)
2014 				  & ~B43legacy_MACCTL_ENABLED);
2015 		b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
2016 		for (i = 40; i; i--) {
2017 			tmp = b43legacy_read32(dev,
2018 					       B43legacy_MMIO_GEN_IRQ_REASON);
2019 			if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
2020 				goto out;
2021 			msleep(1);
2022 		}
2023 		b43legacyerr(dev->wl, "MAC suspend failed\n");
2024 	}
2025 out:
2026 	dev->mac_suspended++;
2027 }
2028 
b43legacy_adjust_opmode(struct b43legacy_wldev * dev)2029 static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
2030 {
2031 	struct b43legacy_wl *wl = dev->wl;
2032 	u32 ctl;
2033 	u16 cfp_pretbtt;
2034 
2035 	ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2036 	/* Reset status to STA infrastructure mode. */
2037 	ctl &= ~B43legacy_MACCTL_AP;
2038 	ctl &= ~B43legacy_MACCTL_KEEP_CTL;
2039 	ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
2040 	ctl &= ~B43legacy_MACCTL_KEEP_BAD;
2041 	ctl &= ~B43legacy_MACCTL_PROMISC;
2042 	ctl &= ~B43legacy_MACCTL_BEACPROMISC;
2043 	ctl |= B43legacy_MACCTL_INFRA;
2044 
2045 	if (b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
2046 		ctl |= B43legacy_MACCTL_AP;
2047 	else if (b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC))
2048 		ctl &= ~B43legacy_MACCTL_INFRA;
2049 
2050 	if (wl->filter_flags & FIF_CONTROL)
2051 		ctl |= B43legacy_MACCTL_KEEP_CTL;
2052 	if (wl->filter_flags & FIF_FCSFAIL)
2053 		ctl |= B43legacy_MACCTL_KEEP_BAD;
2054 	if (wl->filter_flags & FIF_PLCPFAIL)
2055 		ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
2056 	if (wl->filter_flags & FIF_PROMISC_IN_BSS)
2057 		ctl |= B43legacy_MACCTL_PROMISC;
2058 	if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
2059 		ctl |= B43legacy_MACCTL_BEACPROMISC;
2060 
2061 	/* Workaround: On old hardware the HW-MAC-address-filter
2062 	 * doesn't work properly, so always run promisc in filter
2063 	 * it in software. */
2064 	if (dev->dev->id.revision <= 4)
2065 		ctl |= B43legacy_MACCTL_PROMISC;
2066 
2067 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);
2068 
2069 	cfp_pretbtt = 2;
2070 	if ((ctl & B43legacy_MACCTL_INFRA) &&
2071 	    !(ctl & B43legacy_MACCTL_AP)) {
2072 		if (dev->dev->bus->chip_id == 0x4306 &&
2073 		    dev->dev->bus->chip_rev == 3)
2074 			cfp_pretbtt = 100;
2075 		else
2076 			cfp_pretbtt = 50;
2077 	}
2078 	b43legacy_write16(dev, 0x612, cfp_pretbtt);
2079 }
2080 
b43legacy_rate_memory_write(struct b43legacy_wldev * dev,u16 rate,int is_ofdm)2081 static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
2082 					u16 rate,
2083 					int is_ofdm)
2084 {
2085 	u16 offset;
2086 
2087 	if (is_ofdm) {
2088 		offset = 0x480;
2089 		offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
2090 	} else {
2091 		offset = 0x4C0;
2092 		offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
2093 	}
2094 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
2095 			      b43legacy_shm_read16(dev,
2096 			      B43legacy_SHM_SHARED, offset));
2097 }
2098 
b43legacy_rate_memory_init(struct b43legacy_wldev * dev)2099 static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
2100 {
2101 	switch (dev->phy.type) {
2102 	case B43legacy_PHYTYPE_G:
2103 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
2104 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
2105 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
2106 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
2107 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
2108 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
2109 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
2110 		/* fallthrough */
2111 	case B43legacy_PHYTYPE_B:
2112 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
2113 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
2114 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
2115 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
2116 		break;
2117 	default:
2118 		B43legacy_BUG_ON(1);
2119 	}
2120 }
2121 
2122 /* Set the TX-Antenna for management frames sent by firmware. */
b43legacy_mgmtframe_txantenna(struct b43legacy_wldev * dev,int antenna)2123 static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
2124 					  int antenna)
2125 {
2126 	u16 ant = 0;
2127 	u16 tmp;
2128 
2129 	switch (antenna) {
2130 	case B43legacy_ANTENNA0:
2131 		ant |= B43legacy_TX4_PHY_ANT0;
2132 		break;
2133 	case B43legacy_ANTENNA1:
2134 		ant |= B43legacy_TX4_PHY_ANT1;
2135 		break;
2136 	case B43legacy_ANTENNA_AUTO:
2137 		ant |= B43legacy_TX4_PHY_ANTLAST;
2138 		break;
2139 	default:
2140 		B43legacy_BUG_ON(1);
2141 	}
2142 
2143 	/* FIXME We also need to set the other flags of the PHY control
2144 	 * field somewhere. */
2145 
2146 	/* For Beacons */
2147 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2148 				   B43legacy_SHM_SH_BEACPHYCTL);
2149 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2150 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2151 			      B43legacy_SHM_SH_BEACPHYCTL, tmp);
2152 	/* For ACK/CTS */
2153 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2154 				   B43legacy_SHM_SH_ACKCTSPHYCTL);
2155 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2156 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2157 			      B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
2158 	/* For Probe Resposes */
2159 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2160 				   B43legacy_SHM_SH_PRPHYCTL);
2161 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2162 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2163 			      B43legacy_SHM_SH_PRPHYCTL, tmp);
2164 }
2165 
2166 /* This is the opposite of b43legacy_chip_init() */
b43legacy_chip_exit(struct b43legacy_wldev * dev)2167 static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
2168 {
2169 	b43legacy_radio_turn_off(dev, 1);
2170 	b43legacy_gpio_cleanup(dev);
2171 	/* firmware is released later */
2172 }
2173 
2174 /* Initialize the chip
2175  * http://bcm-specs.sipsolutions.net/ChipInit
2176  */
b43legacy_chip_init(struct b43legacy_wldev * dev)2177 static int b43legacy_chip_init(struct b43legacy_wldev *dev)
2178 {
2179 	struct b43legacy_phy *phy = &dev->phy;
2180 	int err;
2181 	int tmp;
2182 	u32 value32, macctl;
2183 	u16 value16;
2184 
2185 	/* Initialize the MAC control */
2186 	macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
2187 	if (dev->phy.gmode)
2188 		macctl |= B43legacy_MACCTL_GMODE;
2189 	macctl |= B43legacy_MACCTL_INFRA;
2190 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
2191 
2192 	err = b43legacy_upload_microcode(dev);
2193 	if (err)
2194 		goto out; /* firmware is released later */
2195 
2196 	err = b43legacy_gpio_init(dev);
2197 	if (err)
2198 		goto out; /* firmware is released later */
2199 
2200 	err = b43legacy_upload_initvals(dev);
2201 	if (err)
2202 		goto err_gpio_clean;
2203 	b43legacy_radio_turn_on(dev);
2204 
2205 	b43legacy_write16(dev, 0x03E6, 0x0000);
2206 	err = b43legacy_phy_init(dev);
2207 	if (err)
2208 		goto err_radio_off;
2209 
2210 	/* Select initial Interference Mitigation. */
2211 	tmp = phy->interfmode;
2212 	phy->interfmode = B43legacy_INTERFMODE_NONE;
2213 	b43legacy_radio_set_interference_mitigation(dev, tmp);
2214 
2215 	b43legacy_phy_set_antenna_diversity(dev);
2216 	b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);
2217 
2218 	if (phy->type == B43legacy_PHYTYPE_B) {
2219 		value16 = b43legacy_read16(dev, 0x005E);
2220 		value16 |= 0x0004;
2221 		b43legacy_write16(dev, 0x005E, value16);
2222 	}
2223 	b43legacy_write32(dev, 0x0100, 0x01000000);
2224 	if (dev->dev->id.revision < 5)
2225 		b43legacy_write32(dev, 0x010C, 0x01000000);
2226 
2227 	value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2228 	value32 &= ~B43legacy_MACCTL_INFRA;
2229 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2230 	value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2231 	value32 |= B43legacy_MACCTL_INFRA;
2232 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2233 
2234 	if (b43legacy_using_pio(dev)) {
2235 		b43legacy_write32(dev, 0x0210, 0x00000100);
2236 		b43legacy_write32(dev, 0x0230, 0x00000100);
2237 		b43legacy_write32(dev, 0x0250, 0x00000100);
2238 		b43legacy_write32(dev, 0x0270, 0x00000100);
2239 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
2240 				      0x0000);
2241 	}
2242 
2243 	/* Probe Response Timeout value */
2244 	/* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
2245 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);
2246 
2247 	/* Initially set the wireless operation mode. */
2248 	b43legacy_adjust_opmode(dev);
2249 
2250 	if (dev->dev->id.revision < 3) {
2251 		b43legacy_write16(dev, 0x060E, 0x0000);
2252 		b43legacy_write16(dev, 0x0610, 0x8000);
2253 		b43legacy_write16(dev, 0x0604, 0x0000);
2254 		b43legacy_write16(dev, 0x0606, 0x0200);
2255 	} else {
2256 		b43legacy_write32(dev, 0x0188, 0x80000000);
2257 		b43legacy_write32(dev, 0x018C, 0x02000000);
2258 	}
2259 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
2260 	b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
2261 	b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
2262 	b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
2263 	b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
2264 	b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
2265 	b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);
2266 
2267 	value32 = ssb_read32(dev->dev, SSB_TMSLOW);
2268 	value32 |= B43legacy_TMSLOW_MACPHYCLKEN;
2269 	ssb_write32(dev->dev, SSB_TMSLOW, value32);
2270 
2271 	b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
2272 			  dev->dev->bus->chipco.fast_pwrup_delay);
2273 
2274 	/* PHY TX errors counter. */
2275 	atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2276 
2277 	B43legacy_WARN_ON(err != 0);
2278 	b43legacydbg(dev->wl, "Chip initialized\n");
2279 out:
2280 	return err;
2281 
2282 err_radio_off:
2283 	b43legacy_radio_turn_off(dev, 1);
2284 err_gpio_clean:
2285 	b43legacy_gpio_cleanup(dev);
2286 	goto out;
2287 }
2288 
b43legacy_periodic_every120sec(struct b43legacy_wldev * dev)2289 static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
2290 {
2291 	struct b43legacy_phy *phy = &dev->phy;
2292 
2293 	if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
2294 		return;
2295 
2296 	b43legacy_mac_suspend(dev);
2297 	b43legacy_phy_lo_g_measure(dev);
2298 	b43legacy_mac_enable(dev);
2299 }
2300 
b43legacy_periodic_every60sec(struct b43legacy_wldev * dev)2301 static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
2302 {
2303 	b43legacy_phy_lo_mark_all_unused(dev);
2304 	if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
2305 		b43legacy_mac_suspend(dev);
2306 		b43legacy_calc_nrssi_slope(dev);
2307 		b43legacy_mac_enable(dev);
2308 	}
2309 }
2310 
b43legacy_periodic_every30sec(struct b43legacy_wldev * dev)2311 static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
2312 {
2313 	/* Update device statistics. */
2314 	b43legacy_calculate_link_quality(dev);
2315 }
2316 
b43legacy_periodic_every15sec(struct b43legacy_wldev * dev)2317 static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
2318 {
2319 	b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */
2320 
2321 	atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2322 	wmb();
2323 }
2324 
do_periodic_work(struct b43legacy_wldev * dev)2325 static void do_periodic_work(struct b43legacy_wldev *dev)
2326 {
2327 	unsigned int state;
2328 
2329 	state = dev->periodic_state;
2330 	if (state % 8 == 0)
2331 		b43legacy_periodic_every120sec(dev);
2332 	if (state % 4 == 0)
2333 		b43legacy_periodic_every60sec(dev);
2334 	if (state % 2 == 0)
2335 		b43legacy_periodic_every30sec(dev);
2336 	b43legacy_periodic_every15sec(dev);
2337 }
2338 
2339 /* Periodic work locking policy:
2340  * 	The whole periodic work handler is protected by
2341  * 	wl->mutex. If another lock is needed somewhere in the
2342  * 	pwork callchain, it's acquired in-place, where it's needed.
2343  */
b43legacy_periodic_work_handler(struct work_struct * work)2344 static void b43legacy_periodic_work_handler(struct work_struct *work)
2345 {
2346 	struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
2347 					     periodic_work.work);
2348 	struct b43legacy_wl *wl = dev->wl;
2349 	unsigned long delay;
2350 
2351 	mutex_lock(&wl->mutex);
2352 
2353 	if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
2354 		goto out;
2355 	if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
2356 		goto out_requeue;
2357 
2358 	do_periodic_work(dev);
2359 
2360 	dev->periodic_state++;
2361 out_requeue:
2362 	if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
2363 		delay = msecs_to_jiffies(50);
2364 	else
2365 		delay = round_jiffies_relative(HZ * 15);
2366 	ieee80211_queue_delayed_work(wl->hw, &dev->periodic_work, delay);
2367 out:
2368 	mutex_unlock(&wl->mutex);
2369 }
2370 
b43legacy_periodic_tasks_setup(struct b43legacy_wldev * dev)2371 static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
2372 {
2373 	struct delayed_work *work = &dev->periodic_work;
2374 
2375 	dev->periodic_state = 0;
2376 	INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
2377 	ieee80211_queue_delayed_work(dev->wl->hw, work, 0);
2378 }
2379 
2380 /* Validate access to the chip (SHM) */
b43legacy_validate_chipaccess(struct b43legacy_wldev * dev)2381 static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
2382 {
2383 	u32 value;
2384 	u32 shm_backup;
2385 
2386 	shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
2387 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
2388 	if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2389 				 0xAA5555AA)
2390 		goto error;
2391 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
2392 	if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2393 				 0x55AAAA55)
2394 		goto error;
2395 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);
2396 
2397 	value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2398 	if ((value | B43legacy_MACCTL_GMODE) !=
2399 	    (B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
2400 		goto error;
2401 
2402 	value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
2403 	if (value)
2404 		goto error;
2405 
2406 	return 0;
2407 error:
2408 	b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
2409 	return -ENODEV;
2410 }
2411 
b43legacy_security_init(struct b43legacy_wldev * dev)2412 static void b43legacy_security_init(struct b43legacy_wldev *dev)
2413 {
2414 	dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
2415 	B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
2416 	dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2417 					0x0056);
2418 	/* KTP is a word address, but we address SHM bytewise.
2419 	 * So multiply by two.
2420 	 */
2421 	dev->ktp *= 2;
2422 	if (dev->dev->id.revision >= 5)
2423 		/* Number of RCMTA address slots */
2424 		b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
2425 				  dev->max_nr_keys - 8);
2426 }
2427 
2428 #ifdef CONFIG_B43LEGACY_HWRNG
b43legacy_rng_read(struct hwrng * rng,u32 * data)2429 static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
2430 {
2431 	struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
2432 	unsigned long flags;
2433 
2434 	/* Don't take wl->mutex here, as it could deadlock with
2435 	 * hwrng internal locking. It's not needed to take
2436 	 * wl->mutex here, anyway. */
2437 
2438 	spin_lock_irqsave(&wl->irq_lock, flags);
2439 	*data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
2440 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2441 
2442 	return (sizeof(u16));
2443 }
2444 #endif
2445 
b43legacy_rng_exit(struct b43legacy_wl * wl)2446 static void b43legacy_rng_exit(struct b43legacy_wl *wl)
2447 {
2448 #ifdef CONFIG_B43LEGACY_HWRNG
2449 	if (wl->rng_initialized)
2450 		hwrng_unregister(&wl->rng);
2451 #endif
2452 }
2453 
b43legacy_rng_init(struct b43legacy_wl * wl)2454 static int b43legacy_rng_init(struct b43legacy_wl *wl)
2455 {
2456 	int err = 0;
2457 
2458 #ifdef CONFIG_B43LEGACY_HWRNG
2459 	snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
2460 		 "%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
2461 	wl->rng.name = wl->rng_name;
2462 	wl->rng.data_read = b43legacy_rng_read;
2463 	wl->rng.priv = (unsigned long)wl;
2464 	wl->rng_initialized = 1;
2465 	err = hwrng_register(&wl->rng);
2466 	if (err) {
2467 		wl->rng_initialized = 0;
2468 		b43legacyerr(wl, "Failed to register the random "
2469 		       "number generator (%d)\n", err);
2470 	}
2471 
2472 #endif
2473 	return err;
2474 }
2475 
b43legacy_tx_work(struct work_struct * work)2476 static void b43legacy_tx_work(struct work_struct *work)
2477 {
2478 	struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
2479 				  tx_work);
2480 	struct b43legacy_wldev *dev;
2481 	struct sk_buff *skb;
2482 	int queue_num;
2483 	int err = 0;
2484 
2485 	mutex_lock(&wl->mutex);
2486 	dev = wl->current_dev;
2487 	if (unlikely(!dev || b43legacy_status(dev) < B43legacy_STAT_STARTED)) {
2488 		mutex_unlock(&wl->mutex);
2489 		return;
2490 	}
2491 
2492 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2493 		while (skb_queue_len(&wl->tx_queue[queue_num])) {
2494 			skb = skb_dequeue(&wl->tx_queue[queue_num]);
2495 			if (b43legacy_using_pio(dev))
2496 				err = b43legacy_pio_tx(dev, skb);
2497 			else
2498 				err = b43legacy_dma_tx(dev, skb);
2499 			if (err == -ENOSPC) {
2500 				wl->tx_queue_stopped[queue_num] = 1;
2501 				ieee80211_stop_queue(wl->hw, queue_num);
2502 				skb_queue_head(&wl->tx_queue[queue_num], skb);
2503 				break;
2504 			}
2505 			if (unlikely(err))
2506 				dev_kfree_skb(skb); /* Drop it */
2507 			err = 0;
2508 		}
2509 
2510 		if (!err)
2511 			wl->tx_queue_stopped[queue_num] = 0;
2512 	}
2513 
2514 	mutex_unlock(&wl->mutex);
2515 }
2516 
b43legacy_op_tx(struct ieee80211_hw * hw,struct sk_buff * skb)2517 static void b43legacy_op_tx(struct ieee80211_hw *hw,
2518 			    struct sk_buff *skb)
2519 {
2520 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2521 
2522 	if (unlikely(skb->len < 2 + 2 + 6)) {
2523 		/* Too short, this can't be a valid frame. */
2524 		dev_kfree_skb_any(skb);
2525 		return;
2526 	}
2527 	B43legacy_WARN_ON(skb_shinfo(skb)->nr_frags);
2528 
2529 	skb_queue_tail(&wl->tx_queue[skb->queue_mapping], skb);
2530 	if (!wl->tx_queue_stopped[skb->queue_mapping])
2531 		ieee80211_queue_work(wl->hw, &wl->tx_work);
2532 	else
2533 		ieee80211_stop_queue(wl->hw, skb->queue_mapping);
2534 }
2535 
b43legacy_op_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)2536 static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
2537 				struct ieee80211_vif *vif, u16 queue,
2538 				const struct ieee80211_tx_queue_params *params)
2539 {
2540 	return 0;
2541 }
2542 
b43legacy_op_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)2543 static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
2544 				  struct ieee80211_low_level_stats *stats)
2545 {
2546 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2547 	unsigned long flags;
2548 
2549 	spin_lock_irqsave(&wl->irq_lock, flags);
2550 	memcpy(stats, &wl->ieee_stats, sizeof(*stats));
2551 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2552 
2553 	return 0;
2554 }
2555 
phymode_to_string(unsigned int phymode)2556 static const char *phymode_to_string(unsigned int phymode)
2557 {
2558 	switch (phymode) {
2559 	case B43legacy_PHYMODE_B:
2560 		return "B";
2561 	case B43legacy_PHYMODE_G:
2562 		return "G";
2563 	default:
2564 		B43legacy_BUG_ON(1);
2565 	}
2566 	return "";
2567 }
2568 
find_wldev_for_phymode(struct b43legacy_wl * wl,unsigned int phymode,struct b43legacy_wldev ** dev,bool * gmode)2569 static int find_wldev_for_phymode(struct b43legacy_wl *wl,
2570 				  unsigned int phymode,
2571 				  struct b43legacy_wldev **dev,
2572 				  bool *gmode)
2573 {
2574 	struct b43legacy_wldev *d;
2575 
2576 	list_for_each_entry(d, &wl->devlist, list) {
2577 		if (d->phy.possible_phymodes & phymode) {
2578 			/* Ok, this device supports the PHY-mode.
2579 			 * Set the gmode bit. */
2580 			*gmode = true;
2581 			*dev = d;
2582 
2583 			return 0;
2584 		}
2585 	}
2586 
2587 	return -ESRCH;
2588 }
2589 
b43legacy_put_phy_into_reset(struct b43legacy_wldev * dev)2590 static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
2591 {
2592 	struct ssb_device *sdev = dev->dev;
2593 	u32 tmslow;
2594 
2595 	tmslow = ssb_read32(sdev, SSB_TMSLOW);
2596 	tmslow &= ~B43legacy_TMSLOW_GMODE;
2597 	tmslow |= B43legacy_TMSLOW_PHYRESET;
2598 	tmslow |= SSB_TMSLOW_FGC;
2599 	ssb_write32(sdev, SSB_TMSLOW, tmslow);
2600 	msleep(1);
2601 
2602 	tmslow = ssb_read32(sdev, SSB_TMSLOW);
2603 	tmslow &= ~SSB_TMSLOW_FGC;
2604 	tmslow |= B43legacy_TMSLOW_PHYRESET;
2605 	ssb_write32(sdev, SSB_TMSLOW, tmslow);
2606 	msleep(1);
2607 }
2608 
2609 /* Expects wl->mutex locked */
b43legacy_switch_phymode(struct b43legacy_wl * wl,unsigned int new_mode)2610 static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
2611 				      unsigned int new_mode)
2612 {
2613 	struct b43legacy_wldev *uninitialized_var(up_dev);
2614 	struct b43legacy_wldev *down_dev;
2615 	int err;
2616 	bool gmode = false;
2617 	int prev_status;
2618 
2619 	err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
2620 	if (err) {
2621 		b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
2622 		       phymode_to_string(new_mode));
2623 		return err;
2624 	}
2625 	if ((up_dev == wl->current_dev) &&
2626 	    (!!wl->current_dev->phy.gmode == !!gmode))
2627 		/* This device is already running. */
2628 		return 0;
2629 	b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
2630 	       phymode_to_string(new_mode));
2631 	down_dev = wl->current_dev;
2632 
2633 	prev_status = b43legacy_status(down_dev);
2634 	/* Shutdown the currently running core. */
2635 	if (prev_status >= B43legacy_STAT_STARTED)
2636 		b43legacy_wireless_core_stop(down_dev);
2637 	if (prev_status >= B43legacy_STAT_INITIALIZED)
2638 		b43legacy_wireless_core_exit(down_dev);
2639 
2640 	if (down_dev != up_dev)
2641 		/* We switch to a different core, so we put PHY into
2642 		 * RESET on the old core. */
2643 		b43legacy_put_phy_into_reset(down_dev);
2644 
2645 	/* Now start the new core. */
2646 	up_dev->phy.gmode = gmode;
2647 	if (prev_status >= B43legacy_STAT_INITIALIZED) {
2648 		err = b43legacy_wireless_core_init(up_dev);
2649 		if (err) {
2650 			b43legacyerr(wl, "Fatal: Could not initialize device"
2651 				     " for newly selected %s-PHY mode\n",
2652 				     phymode_to_string(new_mode));
2653 			goto init_failure;
2654 		}
2655 	}
2656 	if (prev_status >= B43legacy_STAT_STARTED) {
2657 		err = b43legacy_wireless_core_start(up_dev);
2658 		if (err) {
2659 			b43legacyerr(wl, "Fatal: Coult not start device for "
2660 			       "newly selected %s-PHY mode\n",
2661 			       phymode_to_string(new_mode));
2662 			b43legacy_wireless_core_exit(up_dev);
2663 			goto init_failure;
2664 		}
2665 	}
2666 	B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
2667 
2668 	b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
2669 
2670 	wl->current_dev = up_dev;
2671 
2672 	return 0;
2673 init_failure:
2674 	/* Whoops, failed to init the new core. No core is operating now. */
2675 	wl->current_dev = NULL;
2676 	return err;
2677 }
2678 
2679 /* Write the short and long frame retry limit values. */
b43legacy_set_retry_limits(struct b43legacy_wldev * dev,unsigned int short_retry,unsigned int long_retry)2680 static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
2681 				       unsigned int short_retry,
2682 				       unsigned int long_retry)
2683 {
2684 	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
2685 	 * the chip-internal counter. */
2686 	short_retry = min(short_retry, (unsigned int)0xF);
2687 	long_retry = min(long_retry, (unsigned int)0xF);
2688 
2689 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
2690 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
2691 }
2692 
b43legacy_op_dev_config(struct ieee80211_hw * hw,u32 changed)2693 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
2694 				   u32 changed)
2695 {
2696 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2697 	struct b43legacy_wldev *dev;
2698 	struct b43legacy_phy *phy;
2699 	struct ieee80211_conf *conf = &hw->conf;
2700 	unsigned long flags;
2701 	unsigned int new_phymode = 0xFFFF;
2702 	int antenna_tx;
2703 	int err = 0;
2704 
2705 	antenna_tx = B43legacy_ANTENNA_DEFAULT;
2706 
2707 	mutex_lock(&wl->mutex);
2708 	dev = wl->current_dev;
2709 	phy = &dev->phy;
2710 
2711 	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
2712 		b43legacy_set_retry_limits(dev,
2713 					   conf->short_frame_max_tx_count,
2714 					   conf->long_frame_max_tx_count);
2715 	changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
2716 	if (!changed)
2717 		goto out_unlock_mutex;
2718 
2719 	/* Switch the PHY mode (if necessary). */
2720 	switch (conf->channel->band) {
2721 	case IEEE80211_BAND_2GHZ:
2722 		if (phy->type == B43legacy_PHYTYPE_B)
2723 			new_phymode = B43legacy_PHYMODE_B;
2724 		else
2725 			new_phymode = B43legacy_PHYMODE_G;
2726 		break;
2727 	default:
2728 		B43legacy_WARN_ON(1);
2729 	}
2730 	err = b43legacy_switch_phymode(wl, new_phymode);
2731 	if (err)
2732 		goto out_unlock_mutex;
2733 
2734 	/* Disable IRQs while reconfiguring the device.
2735 	 * This makes it possible to drop the spinlock throughout
2736 	 * the reconfiguration process. */
2737 	spin_lock_irqsave(&wl->irq_lock, flags);
2738 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2739 		spin_unlock_irqrestore(&wl->irq_lock, flags);
2740 		goto out_unlock_mutex;
2741 	}
2742 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2743 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2744 	b43legacy_synchronize_irq(dev);
2745 
2746 	/* Switch to the requested channel.
2747 	 * The firmware takes care of races with the TX handler. */
2748 	if (conf->channel->hw_value != phy->channel)
2749 		b43legacy_radio_selectchannel(dev, conf->channel->hw_value, 0);
2750 
2751 	dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_MONITOR);
2752 
2753 	/* Adjust the desired TX power level. */
2754 	if (conf->power_level != 0) {
2755 		if (conf->power_level != phy->power_level) {
2756 			phy->power_level = conf->power_level;
2757 			b43legacy_phy_xmitpower(dev);
2758 		}
2759 	}
2760 
2761 	/* Antennas for RX and management frame TX. */
2762 	b43legacy_mgmtframe_txantenna(dev, antenna_tx);
2763 
2764 	if (wl->radio_enabled != phy->radio_on) {
2765 		if (wl->radio_enabled) {
2766 			b43legacy_radio_turn_on(dev);
2767 			b43legacyinfo(dev->wl, "Radio turned on by software\n");
2768 			if (!dev->radio_hw_enable)
2769 				b43legacyinfo(dev->wl, "The hardware RF-kill"
2770 					      " button still turns the radio"
2771 					      " physically off. Press the"
2772 					      " button to turn it on.\n");
2773 		} else {
2774 			b43legacy_radio_turn_off(dev, 0);
2775 			b43legacyinfo(dev->wl, "Radio turned off by"
2776 				      " software\n");
2777 		}
2778 	}
2779 
2780 	spin_lock_irqsave(&wl->irq_lock, flags);
2781 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2782 	mmiowb();
2783 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2784 out_unlock_mutex:
2785 	mutex_unlock(&wl->mutex);
2786 
2787 	return err;
2788 }
2789 
b43legacy_update_basic_rates(struct b43legacy_wldev * dev,u32 brates)2790 static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
2791 {
2792 	struct ieee80211_supported_band *sband =
2793 		dev->wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2794 	struct ieee80211_rate *rate;
2795 	int i;
2796 	u16 basic, direct, offset, basic_offset, rateptr;
2797 
2798 	for (i = 0; i < sband->n_bitrates; i++) {
2799 		rate = &sband->bitrates[i];
2800 
2801 		if (b43legacy_is_cck_rate(rate->hw_value)) {
2802 			direct = B43legacy_SHM_SH_CCKDIRECT;
2803 			basic = B43legacy_SHM_SH_CCKBASIC;
2804 			offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2805 			offset &= 0xF;
2806 		} else {
2807 			direct = B43legacy_SHM_SH_OFDMDIRECT;
2808 			basic = B43legacy_SHM_SH_OFDMBASIC;
2809 			offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2810 			offset &= 0xF;
2811 		}
2812 
2813 		rate = ieee80211_get_response_rate(sband, brates, rate->bitrate);
2814 
2815 		if (b43legacy_is_cck_rate(rate->hw_value)) {
2816 			basic_offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2817 			basic_offset &= 0xF;
2818 		} else {
2819 			basic_offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2820 			basic_offset &= 0xF;
2821 		}
2822 
2823 		/*
2824 		 * Get the pointer that we need to point to
2825 		 * from the direct map
2826 		 */
2827 		rateptr = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2828 					       direct + 2 * basic_offset);
2829 		/* and write it to the basic map */
2830 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2831 				      basic + 2 * offset, rateptr);
2832 	}
2833 }
2834 
b43legacy_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf,u32 changed)2835 static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
2836 				    struct ieee80211_vif *vif,
2837 				    struct ieee80211_bss_conf *conf,
2838 				    u32 changed)
2839 {
2840 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2841 	struct b43legacy_wldev *dev;
2842 	unsigned long flags;
2843 
2844 	mutex_lock(&wl->mutex);
2845 	B43legacy_WARN_ON(wl->vif != vif);
2846 
2847 	dev = wl->current_dev;
2848 
2849 	/* Disable IRQs while reconfiguring the device.
2850 	 * This makes it possible to drop the spinlock throughout
2851 	 * the reconfiguration process. */
2852 	spin_lock_irqsave(&wl->irq_lock, flags);
2853 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2854 		spin_unlock_irqrestore(&wl->irq_lock, flags);
2855 		goto out_unlock_mutex;
2856 	}
2857 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2858 
2859 	if (changed & BSS_CHANGED_BSSID) {
2860 		b43legacy_synchronize_irq(dev);
2861 
2862 		if (conf->bssid)
2863 			memcpy(wl->bssid, conf->bssid, ETH_ALEN);
2864 		else
2865 			memset(wl->bssid, 0, ETH_ALEN);
2866 	}
2867 
2868 	if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
2869 		if (changed & BSS_CHANGED_BEACON &&
2870 		    (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2871 		     b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2872 			b43legacy_update_templates(wl);
2873 
2874 		if (changed & BSS_CHANGED_BSSID)
2875 			b43legacy_write_mac_bssid_templates(dev);
2876 	}
2877 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2878 
2879 	b43legacy_mac_suspend(dev);
2880 
2881 	if (changed & BSS_CHANGED_BEACON_INT &&
2882 	    (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2883 	     b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2884 		b43legacy_set_beacon_int(dev, conf->beacon_int);
2885 
2886 	if (changed & BSS_CHANGED_BASIC_RATES)
2887 		b43legacy_update_basic_rates(dev, conf->basic_rates);
2888 
2889 	if (changed & BSS_CHANGED_ERP_SLOT) {
2890 		if (conf->use_short_slot)
2891 			b43legacy_short_slot_timing_enable(dev);
2892 		else
2893 			b43legacy_short_slot_timing_disable(dev);
2894 	}
2895 
2896 	b43legacy_mac_enable(dev);
2897 
2898 	spin_lock_irqsave(&wl->irq_lock, flags);
2899 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2900 	/* XXX: why? */
2901 	mmiowb();
2902 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2903  out_unlock_mutex:
2904 	mutex_unlock(&wl->mutex);
2905 }
2906 
b43legacy_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed,unsigned int * fflags,u64 multicast)2907 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
2908 					  unsigned int changed,
2909 					  unsigned int *fflags,u64 multicast)
2910 {
2911 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2912 	struct b43legacy_wldev *dev = wl->current_dev;
2913 	unsigned long flags;
2914 
2915 	if (!dev) {
2916 		*fflags = 0;
2917 		return;
2918 	}
2919 
2920 	spin_lock_irqsave(&wl->irq_lock, flags);
2921 	*fflags &= FIF_PROMISC_IN_BSS |
2922 		  FIF_ALLMULTI |
2923 		  FIF_FCSFAIL |
2924 		  FIF_PLCPFAIL |
2925 		  FIF_CONTROL |
2926 		  FIF_OTHER_BSS |
2927 		  FIF_BCN_PRBRESP_PROMISC;
2928 
2929 	changed &= FIF_PROMISC_IN_BSS |
2930 		   FIF_ALLMULTI |
2931 		   FIF_FCSFAIL |
2932 		   FIF_PLCPFAIL |
2933 		   FIF_CONTROL |
2934 		   FIF_OTHER_BSS |
2935 		   FIF_BCN_PRBRESP_PROMISC;
2936 
2937 	wl->filter_flags = *fflags;
2938 
2939 	if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
2940 		b43legacy_adjust_opmode(dev);
2941 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2942 }
2943 
2944 /* Locking: wl->mutex */
b43legacy_wireless_core_stop(struct b43legacy_wldev * dev)2945 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
2946 {
2947 	struct b43legacy_wl *wl = dev->wl;
2948 	unsigned long flags;
2949 	int queue_num;
2950 
2951 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
2952 		return;
2953 
2954 	/* Disable and sync interrupts. We must do this before than
2955 	 * setting the status to INITIALIZED, as the interrupt handler
2956 	 * won't care about IRQs then. */
2957 	spin_lock_irqsave(&wl->irq_lock, flags);
2958 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2959 	b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
2960 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2961 	b43legacy_synchronize_irq(dev);
2962 
2963 	b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
2964 
2965 	mutex_unlock(&wl->mutex);
2966 	/* Must unlock as it would otherwise deadlock. No races here.
2967 	 * Cancel the possibly running self-rearming periodic work. */
2968 	cancel_delayed_work_sync(&dev->periodic_work);
2969 	cancel_work_sync(&wl->tx_work);
2970 	mutex_lock(&wl->mutex);
2971 
2972 	/* Drain all TX queues. */
2973 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2974 		while (skb_queue_len(&wl->tx_queue[queue_num]))
2975 			dev_kfree_skb(skb_dequeue(&wl->tx_queue[queue_num]));
2976 	}
2977 
2978 b43legacy_mac_suspend(dev);
2979 	free_irq(dev->dev->irq, dev);
2980 	b43legacydbg(wl, "Wireless interface stopped\n");
2981 }
2982 
2983 /* Locking: wl->mutex */
b43legacy_wireless_core_start(struct b43legacy_wldev * dev)2984 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
2985 {
2986 	int err;
2987 
2988 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
2989 
2990 	drain_txstatus_queue(dev);
2991 	err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
2992 			  IRQF_SHARED, KBUILD_MODNAME, dev);
2993 	if (err) {
2994 		b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
2995 		       dev->dev->irq);
2996 		goto out;
2997 	}
2998 	/* We are ready to run. */
2999 	ieee80211_wake_queues(dev->wl->hw);
3000 	b43legacy_set_status(dev, B43legacy_STAT_STARTED);
3001 
3002 	/* Start data flow (TX/RX) */
3003 	b43legacy_mac_enable(dev);
3004 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
3005 
3006 	/* Start maintenance work */
3007 	b43legacy_periodic_tasks_setup(dev);
3008 
3009 	b43legacydbg(dev->wl, "Wireless interface started\n");
3010 out:
3011 	return err;
3012 }
3013 
3014 /* Get PHY and RADIO versioning numbers */
b43legacy_phy_versioning(struct b43legacy_wldev * dev)3015 static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
3016 {
3017 	struct b43legacy_phy *phy = &dev->phy;
3018 	u32 tmp;
3019 	u8 analog_type;
3020 	u8 phy_type;
3021 	u8 phy_rev;
3022 	u16 radio_manuf;
3023 	u16 radio_ver;
3024 	u16 radio_rev;
3025 	int unsupported = 0;
3026 
3027 	/* Get PHY versioning */
3028 	tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
3029 	analog_type = (tmp & B43legacy_PHYVER_ANALOG)
3030 		      >> B43legacy_PHYVER_ANALOG_SHIFT;
3031 	phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
3032 	phy_rev = (tmp & B43legacy_PHYVER_VERSION);
3033 	switch (phy_type) {
3034 	case B43legacy_PHYTYPE_B:
3035 		if (phy_rev != 2 && phy_rev != 4
3036 		    && phy_rev != 6 && phy_rev != 7)
3037 			unsupported = 1;
3038 		break;
3039 	case B43legacy_PHYTYPE_G:
3040 		if (phy_rev > 8)
3041 			unsupported = 1;
3042 		break;
3043 	default:
3044 		unsupported = 1;
3045 	}
3046 	if (unsupported) {
3047 		b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
3048 		       "(Analog %u, Type %u, Revision %u)\n",
3049 		       analog_type, phy_type, phy_rev);
3050 		return -EOPNOTSUPP;
3051 	}
3052 	b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
3053 	       analog_type, phy_type, phy_rev);
3054 
3055 
3056 	/* Get RADIO versioning */
3057 	if (dev->dev->bus->chip_id == 0x4317) {
3058 		if (dev->dev->bus->chip_rev == 0)
3059 			tmp = 0x3205017F;
3060 		else if (dev->dev->bus->chip_rev == 1)
3061 			tmp = 0x4205017F;
3062 		else
3063 			tmp = 0x5205017F;
3064 	} else {
3065 		b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3066 				  B43legacy_RADIOCTL_ID);
3067 		tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
3068 		tmp <<= 16;
3069 		b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3070 				  B43legacy_RADIOCTL_ID);
3071 		tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
3072 	}
3073 	radio_manuf = (tmp & 0x00000FFF);
3074 	radio_ver = (tmp & 0x0FFFF000) >> 12;
3075 	radio_rev = (tmp & 0xF0000000) >> 28;
3076 	switch (phy_type) {
3077 	case B43legacy_PHYTYPE_B:
3078 		if ((radio_ver & 0xFFF0) != 0x2050)
3079 			unsupported = 1;
3080 		break;
3081 	case B43legacy_PHYTYPE_G:
3082 		if (radio_ver != 0x2050)
3083 			unsupported = 1;
3084 		break;
3085 	default:
3086 		B43legacy_BUG_ON(1);
3087 	}
3088 	if (unsupported) {
3089 		b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
3090 		       "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
3091 		       radio_manuf, radio_ver, radio_rev);
3092 		return -EOPNOTSUPP;
3093 	}
3094 	b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
3095 		     " Revision %u\n", radio_manuf, radio_ver, radio_rev);
3096 
3097 
3098 	phy->radio_manuf = radio_manuf;
3099 	phy->radio_ver = radio_ver;
3100 	phy->radio_rev = radio_rev;
3101 
3102 	phy->analog = analog_type;
3103 	phy->type = phy_type;
3104 	phy->rev = phy_rev;
3105 
3106 	return 0;
3107 }
3108 
setup_struct_phy_for_init(struct b43legacy_wldev * dev,struct b43legacy_phy * phy)3109 static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
3110 				      struct b43legacy_phy *phy)
3111 {
3112 	struct b43legacy_lopair *lo;
3113 	int i;
3114 
3115 	memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3116 	memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3117 
3118 	/* Assume the radio is enabled. If it's not enabled, the state will
3119 	 * immediately get fixed on the first periodic work run. */
3120 	dev->radio_hw_enable = true;
3121 
3122 	phy->savedpctlreg = 0xFFFF;
3123 	phy->aci_enable = false;
3124 	phy->aci_wlan_automatic = false;
3125 	phy->aci_hw_rssi = false;
3126 
3127 	lo = phy->_lo_pairs;
3128 	if (lo)
3129 		memset(lo, 0, sizeof(struct b43legacy_lopair) *
3130 				     B43legacy_LO_COUNT);
3131 	phy->max_lb_gain = 0;
3132 	phy->trsw_rx_gain = 0;
3133 
3134 	/* Set default attenuation values. */
3135 	phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3136 	phy->rfatt = b43legacy_default_radio_attenuation(dev);
3137 	phy->txctl1 = b43legacy_default_txctl1(dev);
3138 	phy->txpwr_offset = 0;
3139 
3140 	/* NRSSI */
3141 	phy->nrssislope = 0;
3142 	for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3143 		phy->nrssi[i] = -1000;
3144 	for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3145 		phy->nrssi_lt[i] = i;
3146 
3147 	phy->lofcal = 0xFFFF;
3148 	phy->initval = 0xFFFF;
3149 
3150 	phy->interfmode = B43legacy_INTERFMODE_NONE;
3151 	phy->channel = 0xFF;
3152 }
3153 
setup_struct_wldev_for_init(struct b43legacy_wldev * dev)3154 static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
3155 {
3156 	/* Flags */
3157 	dev->dfq_valid = false;
3158 
3159 	/* Stats */
3160 	memset(&dev->stats, 0, sizeof(dev->stats));
3161 
3162 	setup_struct_phy_for_init(dev, &dev->phy);
3163 
3164 	/* IRQ related flags */
3165 	dev->irq_reason = 0;
3166 	memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
3167 	dev->irq_mask = B43legacy_IRQ_MASKTEMPLATE;
3168 
3169 	dev->mac_suspended = 1;
3170 
3171 	/* Noise calculation context */
3172 	memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
3173 }
3174 
b43legacy_set_synth_pu_delay(struct b43legacy_wldev * dev,bool idle)3175 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
3176 					  bool idle) {
3177 	u16 pu_delay = 1050;
3178 
3179 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC) || idle)
3180 		pu_delay = 500;
3181 	if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
3182 		pu_delay = max(pu_delay, (u16)2400);
3183 
3184 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3185 			      B43legacy_SHM_SH_SPUWKUP, pu_delay);
3186 }
3187 
3188 /* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
b43legacy_set_pretbtt(struct b43legacy_wldev * dev)3189 static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
3190 {
3191 	u16 pretbtt;
3192 
3193 	/* The time value is in microseconds. */
3194 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
3195 		pretbtt = 2;
3196 	else
3197 		pretbtt = 250;
3198 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3199 			      B43legacy_SHM_SH_PRETBTT, pretbtt);
3200 	b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
3201 }
3202 
3203 /* Shutdown a wireless core */
3204 /* Locking: wl->mutex */
b43legacy_wireless_core_exit(struct b43legacy_wldev * dev)3205 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
3206 {
3207 	struct b43legacy_phy *phy = &dev->phy;
3208 	u32 macctl;
3209 
3210 	B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
3211 	if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
3212 		return;
3213 	b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
3214 
3215 	/* Stop the microcode PSM. */
3216 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
3217 	macctl &= ~B43legacy_MACCTL_PSM_RUN;
3218 	macctl |= B43legacy_MACCTL_PSM_JMP0;
3219 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
3220 
3221 	b43legacy_leds_exit(dev);
3222 	b43legacy_rng_exit(dev->wl);
3223 	b43legacy_pio_free(dev);
3224 	b43legacy_dma_free(dev);
3225 	b43legacy_chip_exit(dev);
3226 	b43legacy_radio_turn_off(dev, 1);
3227 	b43legacy_switch_analog(dev, 0);
3228 	if (phy->dyn_tssi_tbl)
3229 		kfree(phy->tssi2dbm);
3230 	kfree(phy->lo_control);
3231 	phy->lo_control = NULL;
3232 	if (dev->wl->current_beacon) {
3233 		dev_kfree_skb_any(dev->wl->current_beacon);
3234 		dev->wl->current_beacon = NULL;
3235 	}
3236 
3237 	ssb_device_disable(dev->dev, 0);
3238 	ssb_bus_may_powerdown(dev->dev->bus);
3239 }
3240 
prepare_phy_data_for_init(struct b43legacy_wldev * dev)3241 static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
3242 {
3243 	struct b43legacy_phy *phy = &dev->phy;
3244 	int i;
3245 
3246 	/* Set default attenuation values. */
3247 	phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3248 	phy->rfatt = b43legacy_default_radio_attenuation(dev);
3249 	phy->txctl1 = b43legacy_default_txctl1(dev);
3250 	phy->txctl2 = 0xFFFF;
3251 	phy->txpwr_offset = 0;
3252 
3253 	/* NRSSI */
3254 	phy->nrssislope = 0;
3255 	for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3256 		phy->nrssi[i] = -1000;
3257 	for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3258 		phy->nrssi_lt[i] = i;
3259 
3260 	phy->lofcal = 0xFFFF;
3261 	phy->initval = 0xFFFF;
3262 
3263 	phy->aci_enable = false;
3264 	phy->aci_wlan_automatic = false;
3265 	phy->aci_hw_rssi = false;
3266 
3267 	phy->antenna_diversity = 0xFFFF;
3268 	memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3269 	memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3270 
3271 	/* Flags */
3272 	phy->calibrated = 0;
3273 
3274 	if (phy->_lo_pairs)
3275 		memset(phy->_lo_pairs, 0,
3276 		       sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
3277 	memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
3278 }
3279 
3280 /* Initialize a wireless core */
b43legacy_wireless_core_init(struct b43legacy_wldev * dev)3281 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
3282 {
3283 	struct b43legacy_wl *wl = dev->wl;
3284 	struct ssb_bus *bus = dev->dev->bus;
3285 	struct b43legacy_phy *phy = &dev->phy;
3286 	struct ssb_sprom *sprom = &dev->dev->bus->sprom;
3287 	int err;
3288 	u32 hf;
3289 	u32 tmp;
3290 
3291 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3292 
3293 	err = ssb_bus_powerup(bus, 0);
3294 	if (err)
3295 		goto out;
3296 	if (!ssb_device_is_enabled(dev->dev)) {
3297 		tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
3298 		b43legacy_wireless_core_reset(dev, tmp);
3299 	}
3300 
3301 	if ((phy->type == B43legacy_PHYTYPE_B) ||
3302 	    (phy->type == B43legacy_PHYTYPE_G)) {
3303 		phy->_lo_pairs = kzalloc(sizeof(struct b43legacy_lopair)
3304 					 * B43legacy_LO_COUNT,
3305 					 GFP_KERNEL);
3306 		if (!phy->_lo_pairs)
3307 			return -ENOMEM;
3308 	}
3309 	setup_struct_wldev_for_init(dev);
3310 
3311 	err = b43legacy_phy_init_tssi2dbm_table(dev);
3312 	if (err)
3313 		goto err_kfree_lo_control;
3314 
3315 	/* Enable IRQ routing to this device. */
3316 	ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
3317 
3318 	prepare_phy_data_for_init(dev);
3319 	b43legacy_phy_calibrate(dev);
3320 	err = b43legacy_chip_init(dev);
3321 	if (err)
3322 		goto err_kfree_tssitbl;
3323 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3324 			      B43legacy_SHM_SH_WLCOREREV,
3325 			      dev->dev->id.revision);
3326 	hf = b43legacy_hf_read(dev);
3327 	if (phy->type == B43legacy_PHYTYPE_G) {
3328 		hf |= B43legacy_HF_SYMW;
3329 		if (phy->rev == 1)
3330 			hf |= B43legacy_HF_GDCW;
3331 		if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
3332 			hf |= B43legacy_HF_OFDMPABOOST;
3333 	} else if (phy->type == B43legacy_PHYTYPE_B) {
3334 		hf |= B43legacy_HF_SYMW;
3335 		if (phy->rev >= 2 && phy->radio_ver == 0x2050)
3336 			hf &= ~B43legacy_HF_GDCW;
3337 	}
3338 	b43legacy_hf_write(dev, hf);
3339 
3340 	b43legacy_set_retry_limits(dev,
3341 				   B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
3342 				   B43legacy_DEFAULT_LONG_RETRY_LIMIT);
3343 
3344 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3345 			      0x0044, 3);
3346 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3347 			      0x0046, 2);
3348 
3349 	/* Disable sending probe responses from firmware.
3350 	 * Setting the MaxTime to one usec will always trigger
3351 	 * a timeout, so we never send any probe resp.
3352 	 * A timeout of zero is infinite. */
3353 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3354 			      B43legacy_SHM_SH_PRMAXTIME, 1);
3355 
3356 	b43legacy_rate_memory_init(dev);
3357 
3358 	/* Minimum Contention Window */
3359 	if (phy->type == B43legacy_PHYTYPE_B)
3360 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3361 				      0x0003, 31);
3362 	else
3363 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3364 				      0x0003, 15);
3365 	/* Maximum Contention Window */
3366 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3367 			      0x0004, 1023);
3368 
3369 	do {
3370 		if (b43legacy_using_pio(dev))
3371 			err = b43legacy_pio_init(dev);
3372 		else {
3373 			err = b43legacy_dma_init(dev);
3374 			if (!err)
3375 				b43legacy_qos_init(dev);
3376 		}
3377 	} while (err == -EAGAIN);
3378 	if (err)
3379 		goto err_chip_exit;
3380 
3381 	b43legacy_set_synth_pu_delay(dev, 1);
3382 
3383 	ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
3384 	b43legacy_upload_card_macaddress(dev);
3385 	b43legacy_security_init(dev);
3386 	b43legacy_rng_init(wl);
3387 
3388 	ieee80211_wake_queues(dev->wl->hw);
3389 	b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
3390 
3391 	b43legacy_leds_init(dev);
3392 out:
3393 	return err;
3394 
3395 err_chip_exit:
3396 	b43legacy_chip_exit(dev);
3397 err_kfree_tssitbl:
3398 	if (phy->dyn_tssi_tbl)
3399 		kfree(phy->tssi2dbm);
3400 err_kfree_lo_control:
3401 	kfree(phy->lo_control);
3402 	phy->lo_control = NULL;
3403 	ssb_bus_may_powerdown(bus);
3404 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3405 	return err;
3406 }
3407 
b43legacy_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3408 static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
3409 				      struct ieee80211_vif *vif)
3410 {
3411 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3412 	struct b43legacy_wldev *dev;
3413 	unsigned long flags;
3414 	int err = -EOPNOTSUPP;
3415 
3416 	/* TODO: allow WDS/AP devices to coexist */
3417 
3418 	if (vif->type != NL80211_IFTYPE_AP &&
3419 	    vif->type != NL80211_IFTYPE_STATION &&
3420 	    vif->type != NL80211_IFTYPE_WDS &&
3421 	    vif->type != NL80211_IFTYPE_ADHOC)
3422 		return -EOPNOTSUPP;
3423 
3424 	mutex_lock(&wl->mutex);
3425 	if (wl->operating)
3426 		goto out_mutex_unlock;
3427 
3428 	b43legacydbg(wl, "Adding Interface type %d\n", vif->type);
3429 
3430 	dev = wl->current_dev;
3431 	wl->operating = true;
3432 	wl->vif = vif;
3433 	wl->if_type = vif->type;
3434 	memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
3435 
3436 	spin_lock_irqsave(&wl->irq_lock, flags);
3437 	b43legacy_adjust_opmode(dev);
3438 	b43legacy_set_pretbtt(dev);
3439 	b43legacy_set_synth_pu_delay(dev, 0);
3440 	b43legacy_upload_card_macaddress(dev);
3441 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3442 
3443 	err = 0;
3444  out_mutex_unlock:
3445 	mutex_unlock(&wl->mutex);
3446 
3447 	return err;
3448 }
3449 
b43legacy_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3450 static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
3451 					  struct ieee80211_vif *vif)
3452 {
3453 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3454 	struct b43legacy_wldev *dev = wl->current_dev;
3455 	unsigned long flags;
3456 
3457 	b43legacydbg(wl, "Removing Interface type %d\n", vif->type);
3458 
3459 	mutex_lock(&wl->mutex);
3460 
3461 	B43legacy_WARN_ON(!wl->operating);
3462 	B43legacy_WARN_ON(wl->vif != vif);
3463 	wl->vif = NULL;
3464 
3465 	wl->operating = false;
3466 
3467 	spin_lock_irqsave(&wl->irq_lock, flags);
3468 	b43legacy_adjust_opmode(dev);
3469 	memset(wl->mac_addr, 0, ETH_ALEN);
3470 	b43legacy_upload_card_macaddress(dev);
3471 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3472 
3473 	mutex_unlock(&wl->mutex);
3474 }
3475 
b43legacy_op_start(struct ieee80211_hw * hw)3476 static int b43legacy_op_start(struct ieee80211_hw *hw)
3477 {
3478 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3479 	struct b43legacy_wldev *dev = wl->current_dev;
3480 	int did_init = 0;
3481 	int err = 0;
3482 
3483 	/* Kill all old instance specific information to make sure
3484 	 * the card won't use it in the short timeframe between start
3485 	 * and mac80211 reconfiguring it. */
3486 	memset(wl->bssid, 0, ETH_ALEN);
3487 	memset(wl->mac_addr, 0, ETH_ALEN);
3488 	wl->filter_flags = 0;
3489 	wl->beacon0_uploaded = false;
3490 	wl->beacon1_uploaded = false;
3491 	wl->beacon_templates_virgin = true;
3492 	wl->radio_enabled = true;
3493 
3494 	mutex_lock(&wl->mutex);
3495 
3496 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
3497 		err = b43legacy_wireless_core_init(dev);
3498 		if (err)
3499 			goto out_mutex_unlock;
3500 		did_init = 1;
3501 	}
3502 
3503 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
3504 		err = b43legacy_wireless_core_start(dev);
3505 		if (err) {
3506 			if (did_init)
3507 				b43legacy_wireless_core_exit(dev);
3508 			goto out_mutex_unlock;
3509 		}
3510 	}
3511 
3512 	wiphy_rfkill_start_polling(hw->wiphy);
3513 
3514 out_mutex_unlock:
3515 	mutex_unlock(&wl->mutex);
3516 
3517 	return err;
3518 }
3519 
b43legacy_op_stop(struct ieee80211_hw * hw)3520 static void b43legacy_op_stop(struct ieee80211_hw *hw)
3521 {
3522 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3523 	struct b43legacy_wldev *dev = wl->current_dev;
3524 
3525 	cancel_work_sync(&(wl->beacon_update_trigger));
3526 
3527 	mutex_lock(&wl->mutex);
3528 	if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
3529 		b43legacy_wireless_core_stop(dev);
3530 	b43legacy_wireless_core_exit(dev);
3531 	wl->radio_enabled = false;
3532 	mutex_unlock(&wl->mutex);
3533 }
3534 
b43legacy_op_beacon_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)3535 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
3536 				       struct ieee80211_sta *sta, bool set)
3537 {
3538 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3539 	unsigned long flags;
3540 
3541 	spin_lock_irqsave(&wl->irq_lock, flags);
3542 	b43legacy_update_templates(wl);
3543 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3544 
3545 	return 0;
3546 }
3547 
b43legacy_op_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)3548 static int b43legacy_op_get_survey(struct ieee80211_hw *hw, int idx,
3549 				   struct survey_info *survey)
3550 {
3551 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3552 	struct b43legacy_wldev *dev = wl->current_dev;
3553 	struct ieee80211_conf *conf = &hw->conf;
3554 
3555 	if (idx != 0)
3556 		return -ENOENT;
3557 
3558 	survey->channel = conf->channel;
3559 	survey->filled = SURVEY_INFO_NOISE_DBM;
3560 	survey->noise = dev->stats.link_noise;
3561 
3562 	return 0;
3563 }
3564 
3565 static const struct ieee80211_ops b43legacy_hw_ops = {
3566 	.tx			= b43legacy_op_tx,
3567 	.conf_tx		= b43legacy_op_conf_tx,
3568 	.add_interface		= b43legacy_op_add_interface,
3569 	.remove_interface	= b43legacy_op_remove_interface,
3570 	.config			= b43legacy_op_dev_config,
3571 	.bss_info_changed	= b43legacy_op_bss_info_changed,
3572 	.configure_filter	= b43legacy_op_configure_filter,
3573 	.get_stats		= b43legacy_op_get_stats,
3574 	.start			= b43legacy_op_start,
3575 	.stop			= b43legacy_op_stop,
3576 	.set_tim		= b43legacy_op_beacon_set_tim,
3577 	.get_survey		= b43legacy_op_get_survey,
3578 	.rfkill_poll		= b43legacy_rfkill_poll,
3579 };
3580 
3581 /* Hard-reset the chip. Do not call this directly.
3582  * Use b43legacy_controller_restart()
3583  */
b43legacy_chip_reset(struct work_struct * work)3584 static void b43legacy_chip_reset(struct work_struct *work)
3585 {
3586 	struct b43legacy_wldev *dev =
3587 		container_of(work, struct b43legacy_wldev, restart_work);
3588 	struct b43legacy_wl *wl = dev->wl;
3589 	int err = 0;
3590 	int prev_status;
3591 
3592 	mutex_lock(&wl->mutex);
3593 
3594 	prev_status = b43legacy_status(dev);
3595 	/* Bring the device down... */
3596 	if (prev_status >= B43legacy_STAT_STARTED)
3597 		b43legacy_wireless_core_stop(dev);
3598 	if (prev_status >= B43legacy_STAT_INITIALIZED)
3599 		b43legacy_wireless_core_exit(dev);
3600 
3601 	/* ...and up again. */
3602 	if (prev_status >= B43legacy_STAT_INITIALIZED) {
3603 		err = b43legacy_wireless_core_init(dev);
3604 		if (err)
3605 			goto out;
3606 	}
3607 	if (prev_status >= B43legacy_STAT_STARTED) {
3608 		err = b43legacy_wireless_core_start(dev);
3609 		if (err) {
3610 			b43legacy_wireless_core_exit(dev);
3611 			goto out;
3612 		}
3613 	}
3614 out:
3615 	if (err)
3616 		wl->current_dev = NULL; /* Failed to init the dev. */
3617 	mutex_unlock(&wl->mutex);
3618 	if (err)
3619 		b43legacyerr(wl, "Controller restart FAILED\n");
3620 	else
3621 		b43legacyinfo(wl, "Controller restarted\n");
3622 }
3623 
b43legacy_setup_modes(struct b43legacy_wldev * dev,int have_bphy,int have_gphy)3624 static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
3625 				 int have_bphy,
3626 				 int have_gphy)
3627 {
3628 	struct ieee80211_hw *hw = dev->wl->hw;
3629 	struct b43legacy_phy *phy = &dev->phy;
3630 
3631 	phy->possible_phymodes = 0;
3632 	if (have_bphy) {
3633 		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3634 			&b43legacy_band_2GHz_BPHY;
3635 		phy->possible_phymodes |= B43legacy_PHYMODE_B;
3636 	}
3637 
3638 	if (have_gphy) {
3639 		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3640 			&b43legacy_band_2GHz_GPHY;
3641 		phy->possible_phymodes |= B43legacy_PHYMODE_G;
3642 	}
3643 
3644 	return 0;
3645 }
3646 
b43legacy_wireless_core_detach(struct b43legacy_wldev * dev)3647 static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
3648 {
3649 	/* We release firmware that late to not be required to re-request
3650 	 * is all the time when we reinit the core. */
3651 	b43legacy_release_firmware(dev);
3652 }
3653 
b43legacy_wireless_core_attach(struct b43legacy_wldev * dev)3654 static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
3655 {
3656 	struct b43legacy_wl *wl = dev->wl;
3657 	struct ssb_bus *bus = dev->dev->bus;
3658 	struct pci_dev *pdev = (bus->bustype == SSB_BUSTYPE_PCI) ? bus->host_pci : NULL;
3659 	int err;
3660 	int have_bphy = 0;
3661 	int have_gphy = 0;
3662 	u32 tmp;
3663 
3664 	/* Do NOT do any device initialization here.
3665 	 * Do it in wireless_core_init() instead.
3666 	 * This function is for gathering basic information about the HW, only.
3667 	 * Also some structs may be set up here. But most likely you want to
3668 	 * have that in core_init(), too.
3669 	 */
3670 
3671 	err = ssb_bus_powerup(bus, 0);
3672 	if (err) {
3673 		b43legacyerr(wl, "Bus powerup failed\n");
3674 		goto out;
3675 	}
3676 	/* Get the PHY type. */
3677 	if (dev->dev->id.revision >= 5) {
3678 		u32 tmshigh;
3679 
3680 		tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
3681 		have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
3682 		if (!have_gphy)
3683 			have_bphy = 1;
3684 	} else if (dev->dev->id.revision == 4)
3685 		have_gphy = 1;
3686 	else
3687 		have_bphy = 1;
3688 
3689 	dev->phy.gmode = (have_gphy || have_bphy);
3690 	dev->phy.radio_on = true;
3691 	tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3692 	b43legacy_wireless_core_reset(dev, tmp);
3693 
3694 	err = b43legacy_phy_versioning(dev);
3695 	if (err)
3696 		goto err_powerdown;
3697 	/* Check if this device supports multiband. */
3698 	if (!pdev ||
3699 	    (pdev->device != 0x4312 &&
3700 	     pdev->device != 0x4319 &&
3701 	     pdev->device != 0x4324)) {
3702 		/* No multiband support. */
3703 		have_bphy = 0;
3704 		have_gphy = 0;
3705 		switch (dev->phy.type) {
3706 		case B43legacy_PHYTYPE_B:
3707 			have_bphy = 1;
3708 			break;
3709 		case B43legacy_PHYTYPE_G:
3710 			have_gphy = 1;
3711 			break;
3712 		default:
3713 			B43legacy_BUG_ON(1);
3714 		}
3715 	}
3716 	dev->phy.gmode = (have_gphy || have_bphy);
3717 	tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3718 	b43legacy_wireless_core_reset(dev, tmp);
3719 
3720 	err = b43legacy_validate_chipaccess(dev);
3721 	if (err)
3722 		goto err_powerdown;
3723 	err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
3724 	if (err)
3725 		goto err_powerdown;
3726 
3727 	/* Now set some default "current_dev" */
3728 	if (!wl->current_dev)
3729 		wl->current_dev = dev;
3730 	INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
3731 
3732 	b43legacy_radio_turn_off(dev, 1);
3733 	b43legacy_switch_analog(dev, 0);
3734 	ssb_device_disable(dev->dev, 0);
3735 	ssb_bus_may_powerdown(bus);
3736 
3737 out:
3738 	return err;
3739 
3740 err_powerdown:
3741 	ssb_bus_may_powerdown(bus);
3742 	return err;
3743 }
3744 
b43legacy_one_core_detach(struct ssb_device * dev)3745 static void b43legacy_one_core_detach(struct ssb_device *dev)
3746 {
3747 	struct b43legacy_wldev *wldev;
3748 	struct b43legacy_wl *wl;
3749 
3750 	/* Do not cancel ieee80211-workqueue based work here.
3751 	 * See comment in b43legacy_remove(). */
3752 
3753 	wldev = ssb_get_drvdata(dev);
3754 	wl = wldev->wl;
3755 	b43legacy_debugfs_remove_device(wldev);
3756 	b43legacy_wireless_core_detach(wldev);
3757 	list_del(&wldev->list);
3758 	wl->nr_devs--;
3759 	ssb_set_drvdata(dev, NULL);
3760 	kfree(wldev);
3761 }
3762 
b43legacy_one_core_attach(struct ssb_device * dev,struct b43legacy_wl * wl)3763 static int b43legacy_one_core_attach(struct ssb_device *dev,
3764 				     struct b43legacy_wl *wl)
3765 {
3766 	struct b43legacy_wldev *wldev;
3767 	int err = -ENOMEM;
3768 
3769 	wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
3770 	if (!wldev)
3771 		goto out;
3772 
3773 	wldev->dev = dev;
3774 	wldev->wl = wl;
3775 	b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
3776 	wldev->bad_frames_preempt = modparam_bad_frames_preempt;
3777 	tasklet_init(&wldev->isr_tasklet,
3778 		     (void (*)(unsigned long))b43legacy_interrupt_tasklet,
3779 		     (unsigned long)wldev);
3780 	if (modparam_pio)
3781 		wldev->__using_pio = true;
3782 	INIT_LIST_HEAD(&wldev->list);
3783 
3784 	err = b43legacy_wireless_core_attach(wldev);
3785 	if (err)
3786 		goto err_kfree_wldev;
3787 
3788 	list_add(&wldev->list, &wl->devlist);
3789 	wl->nr_devs++;
3790 	ssb_set_drvdata(dev, wldev);
3791 	b43legacy_debugfs_add_device(wldev);
3792 out:
3793 	return err;
3794 
3795 err_kfree_wldev:
3796 	kfree(wldev);
3797 	return err;
3798 }
3799 
b43legacy_sprom_fixup(struct ssb_bus * bus)3800 static void b43legacy_sprom_fixup(struct ssb_bus *bus)
3801 {
3802 	/* boardflags workarounds */
3803 	if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
3804 	    bus->boardinfo.type == 0x4E &&
3805 	    bus->boardinfo.rev > 0x40)
3806 		bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
3807 }
3808 
b43legacy_wireless_exit(struct ssb_device * dev,struct b43legacy_wl * wl)3809 static void b43legacy_wireless_exit(struct ssb_device *dev,
3810 				  struct b43legacy_wl *wl)
3811 {
3812 	struct ieee80211_hw *hw = wl->hw;
3813 
3814 	ssb_set_devtypedata(dev, NULL);
3815 	ieee80211_free_hw(hw);
3816 }
3817 
b43legacy_wireless_init(struct ssb_device * dev)3818 static int b43legacy_wireless_init(struct ssb_device *dev)
3819 {
3820 	struct ssb_sprom *sprom = &dev->bus->sprom;
3821 	struct ieee80211_hw *hw;
3822 	struct b43legacy_wl *wl;
3823 	int err = -ENOMEM;
3824 	int queue_num;
3825 
3826 	b43legacy_sprom_fixup(dev->bus);
3827 
3828 	hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
3829 	if (!hw) {
3830 		b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
3831 		goto out;
3832 	}
3833 
3834 	/* fill hw info */
3835 	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
3836 		    IEEE80211_HW_SIGNAL_DBM;
3837 	hw->wiphy->interface_modes =
3838 		BIT(NL80211_IFTYPE_AP) |
3839 		BIT(NL80211_IFTYPE_STATION) |
3840 		BIT(NL80211_IFTYPE_WDS) |
3841 		BIT(NL80211_IFTYPE_ADHOC);
3842 	hw->queues = 1; /* FIXME: hardware has more queues */
3843 	hw->max_rates = 2;
3844 	SET_IEEE80211_DEV(hw, dev->dev);
3845 	if (is_valid_ether_addr(sprom->et1mac))
3846 		SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
3847 	else
3848 		SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
3849 
3850 	/* Get and initialize struct b43legacy_wl */
3851 	wl = hw_to_b43legacy_wl(hw);
3852 	memset(wl, 0, sizeof(*wl));
3853 	wl->hw = hw;
3854 	spin_lock_init(&wl->irq_lock);
3855 	spin_lock_init(&wl->leds_lock);
3856 	mutex_init(&wl->mutex);
3857 	INIT_LIST_HEAD(&wl->devlist);
3858 	INIT_WORK(&wl->beacon_update_trigger, b43legacy_beacon_update_trigger_work);
3859 	INIT_WORK(&wl->tx_work, b43legacy_tx_work);
3860 
3861 	/* Initialize queues and flags. */
3862 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
3863 		skb_queue_head_init(&wl->tx_queue[queue_num]);
3864 		wl->tx_queue_stopped[queue_num] = 0;
3865 	}
3866 
3867 	ssb_set_devtypedata(dev, wl);
3868 	b43legacyinfo(wl, "Broadcom %04X WLAN found (core revision %u)\n",
3869 		      dev->bus->chip_id, dev->id.revision);
3870 	err = 0;
3871 out:
3872 	return err;
3873 }
3874 
b43legacy_probe(struct ssb_device * dev,const struct ssb_device_id * id)3875 static int b43legacy_probe(struct ssb_device *dev,
3876 			 const struct ssb_device_id *id)
3877 {
3878 	struct b43legacy_wl *wl;
3879 	int err;
3880 	int first = 0;
3881 
3882 	wl = ssb_get_devtypedata(dev);
3883 	if (!wl) {
3884 		/* Probing the first core - setup common struct b43legacy_wl */
3885 		first = 1;
3886 		err = b43legacy_wireless_init(dev);
3887 		if (err)
3888 			goto out;
3889 		wl = ssb_get_devtypedata(dev);
3890 		B43legacy_WARN_ON(!wl);
3891 	}
3892 	err = b43legacy_one_core_attach(dev, wl);
3893 	if (err)
3894 		goto err_wireless_exit;
3895 
3896 	/* setup and start work to load firmware */
3897 	INIT_WORK(&wl->firmware_load, b43legacy_request_firmware);
3898 	schedule_work(&wl->firmware_load);
3899 
3900 out:
3901 	return err;
3902 
3903 err_wireless_exit:
3904 	if (first)
3905 		b43legacy_wireless_exit(dev, wl);
3906 	return err;
3907 }
3908 
b43legacy_remove(struct ssb_device * dev)3909 static void b43legacy_remove(struct ssb_device *dev)
3910 {
3911 	struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
3912 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3913 
3914 	/* We must cancel any work here before unregistering from ieee80211,
3915 	 * as the ieee80211 unreg will destroy the workqueue. */
3916 	cancel_work_sync(&wldev->restart_work);
3917 	cancel_work_sync(&wl->firmware_load);
3918 	complete(&wldev->fw_load_complete);
3919 
3920 	B43legacy_WARN_ON(!wl);
3921 	if (!wldev->fw.ucode)
3922 		return;			/* NULL if fw never loaded */
3923 	if (wl->current_dev == wldev)
3924 		ieee80211_unregister_hw(wl->hw);
3925 
3926 	b43legacy_one_core_detach(dev);
3927 
3928 	if (list_empty(&wl->devlist))
3929 		/* Last core on the chip unregistered.
3930 		 * We can destroy common struct b43legacy_wl.
3931 		 */
3932 		b43legacy_wireless_exit(dev, wl);
3933 }
3934 
3935 /* Perform a hardware reset. This can be called from any context. */
b43legacy_controller_restart(struct b43legacy_wldev * dev,const char * reason)3936 void b43legacy_controller_restart(struct b43legacy_wldev *dev,
3937 				  const char *reason)
3938 {
3939 	/* Must avoid requeueing, if we are in shutdown. */
3940 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
3941 		return;
3942 	b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
3943 	ieee80211_queue_work(dev->wl->hw, &dev->restart_work);
3944 }
3945 
3946 #ifdef CONFIG_PM
3947 
b43legacy_suspend(struct ssb_device * dev,pm_message_t state)3948 static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
3949 {
3950 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3951 	struct b43legacy_wl *wl = wldev->wl;
3952 
3953 	b43legacydbg(wl, "Suspending...\n");
3954 
3955 	mutex_lock(&wl->mutex);
3956 	wldev->suspend_init_status = b43legacy_status(wldev);
3957 	if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
3958 		b43legacy_wireless_core_stop(wldev);
3959 	if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
3960 		b43legacy_wireless_core_exit(wldev);
3961 	mutex_unlock(&wl->mutex);
3962 
3963 	b43legacydbg(wl, "Device suspended.\n");
3964 
3965 	return 0;
3966 }
3967 
b43legacy_resume(struct ssb_device * dev)3968 static int b43legacy_resume(struct ssb_device *dev)
3969 {
3970 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3971 	struct b43legacy_wl *wl = wldev->wl;
3972 	int err = 0;
3973 
3974 	b43legacydbg(wl, "Resuming...\n");
3975 
3976 	mutex_lock(&wl->mutex);
3977 	if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
3978 		err = b43legacy_wireless_core_init(wldev);
3979 		if (err) {
3980 			b43legacyerr(wl, "Resume failed at core init\n");
3981 			goto out;
3982 		}
3983 	}
3984 	if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
3985 		err = b43legacy_wireless_core_start(wldev);
3986 		if (err) {
3987 			b43legacy_wireless_core_exit(wldev);
3988 			b43legacyerr(wl, "Resume failed at core start\n");
3989 			goto out;
3990 		}
3991 	}
3992 
3993 	b43legacydbg(wl, "Device resumed.\n");
3994 out:
3995 	mutex_unlock(&wl->mutex);
3996 	return err;
3997 }
3998 
3999 #else	/* CONFIG_PM */
4000 # define b43legacy_suspend	NULL
4001 # define b43legacy_resume		NULL
4002 #endif	/* CONFIG_PM */
4003 
4004 static struct ssb_driver b43legacy_ssb_driver = {
4005 	.name		= KBUILD_MODNAME,
4006 	.id_table	= b43legacy_ssb_tbl,
4007 	.probe		= b43legacy_probe,
4008 	.remove		= b43legacy_remove,
4009 	.suspend	= b43legacy_suspend,
4010 	.resume		= b43legacy_resume,
4011 };
4012 
b43legacy_print_driverinfo(void)4013 static void b43legacy_print_driverinfo(void)
4014 {
4015 	const char *feat_pci = "", *feat_leds = "",
4016 		   *feat_pio = "", *feat_dma = "";
4017 
4018 #ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
4019 	feat_pci = "P";
4020 #endif
4021 #ifdef CONFIG_B43LEGACY_LEDS
4022 	feat_leds = "L";
4023 #endif
4024 #ifdef CONFIG_B43LEGACY_PIO
4025 	feat_pio = "I";
4026 #endif
4027 #ifdef CONFIG_B43LEGACY_DMA
4028 	feat_dma = "D";
4029 #endif
4030 	printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
4031 	       "[ Features: %s%s%s%s ]\n",
4032 	       feat_pci, feat_leds, feat_pio, feat_dma);
4033 }
4034 
b43legacy_init(void)4035 static int __init b43legacy_init(void)
4036 {
4037 	int err;
4038 
4039 	b43legacy_debugfs_init();
4040 
4041 	err = ssb_driver_register(&b43legacy_ssb_driver);
4042 	if (err)
4043 		goto err_dfs_exit;
4044 
4045 	b43legacy_print_driverinfo();
4046 
4047 	return err;
4048 
4049 err_dfs_exit:
4050 	b43legacy_debugfs_exit();
4051 	return err;
4052 }
4053 
b43legacy_exit(void)4054 static void __exit b43legacy_exit(void)
4055 {
4056 	ssb_driver_unregister(&b43legacy_ssb_driver);
4057 	b43legacy_debugfs_exit();
4058 }
4059 
4060 module_init(b43legacy_init)
4061 module_exit(b43legacy_exit)
4062