1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  *  Broadcom B43legacy wireless driver
5  *
6  *  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
7  *  Copyright (c) 2005-2008 Stefano Brivio <stefano.brivio@polimi.it>
8  *  Copyright (c) 2005, 2006 Michael Buesch <m@bues.ch>
9  *  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
10  *  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
11  *  Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>
12  *
13  *  Some parts of the code in this file are derived from the ipw2200
14  *  driver  Copyright(c) 2003 - 2004 Intel Corporation.
15 
16  */
17 
18 #include <linux/delay.h>
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/if_arp.h>
22 #include <linux/etherdevice.h>
23 #include <linux/firmware.h>
24 #include <linux/workqueue.h>
25 #include <linux/sched/signal.h>
26 #include <linux/skbuff.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/slab.h>
29 #include <net/dst.h>
30 #include <asm/unaligned.h>
31 
32 #include "b43legacy.h"
33 #include "main.h"
34 #include "debugfs.h"
35 #include "phy.h"
36 #include "dma.h"
37 #include "pio.h"
38 #include "sysfs.h"
39 #include "xmit.h"
40 #include "radio.h"
41 
42 
43 MODULE_DESCRIPTION("Broadcom B43legacy wireless driver");
44 MODULE_AUTHOR("Martin Langer");
45 MODULE_AUTHOR("Stefano Brivio");
46 MODULE_AUTHOR("Michael Buesch");
47 MODULE_LICENSE("GPL");
48 
49 MODULE_FIRMWARE("b43legacy/ucode2.fw");
50 MODULE_FIRMWARE("b43legacy/ucode4.fw");
51 
52 #if defined(CONFIG_B43LEGACY_DMA) && defined(CONFIG_B43LEGACY_PIO)
53 static int modparam_pio;
54 module_param_named(pio, modparam_pio, int, 0444);
55 MODULE_PARM_DESC(pio, "enable(1) / disable(0) PIO mode");
56 #elif defined(CONFIG_B43LEGACY_DMA)
57 # define modparam_pio	0
58 #elif defined(CONFIG_B43LEGACY_PIO)
59 # define modparam_pio	1
60 #endif
61 
62 static int modparam_bad_frames_preempt;
63 module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444);
64 MODULE_PARM_DESC(bad_frames_preempt, "enable(1) / disable(0) Bad Frames"
65 		 " Preemption");
66 
67 static char modparam_fwpostfix[16];
68 module_param_string(fwpostfix, modparam_fwpostfix, 16, 0444);
69 MODULE_PARM_DESC(fwpostfix, "Postfix for the firmware files to load.");
70 
71 /* The following table supports BCM4301, BCM4303 and BCM4306/2 devices. */
72 static const struct ssb_device_id b43legacy_ssb_tbl[] = {
73 	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 2),
74 	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 4),
75 	{},
76 };
77 MODULE_DEVICE_TABLE(ssb, b43legacy_ssb_tbl);
78 
79 
80 /* Channel and ratetables are shared for all devices.
81  * They can't be const, because ieee80211 puts some precalculated
82  * data in there. This data is the same for all devices, so we don't
83  * get concurrency issues */
84 #define RATETAB_ENT(_rateid, _flags) \
85 	{								\
86 		.bitrate	= B43legacy_RATE_TO_100KBPS(_rateid),	\
87 		.hw_value	= (_rateid),				\
88 		.flags		= (_flags),				\
89 	}
90 /*
91  * NOTE: When changing this, sync with xmit.c's
92  *	 b43legacy_plcp_get_bitrate_idx_* functions!
93  */
94 static struct ieee80211_rate __b43legacy_ratetable[] = {
95 	RATETAB_ENT(B43legacy_CCK_RATE_1MB, 0),
96 	RATETAB_ENT(B43legacy_CCK_RATE_2MB, IEEE80211_RATE_SHORT_PREAMBLE),
97 	RATETAB_ENT(B43legacy_CCK_RATE_5MB, IEEE80211_RATE_SHORT_PREAMBLE),
98 	RATETAB_ENT(B43legacy_CCK_RATE_11MB, IEEE80211_RATE_SHORT_PREAMBLE),
99 	RATETAB_ENT(B43legacy_OFDM_RATE_6MB, 0),
100 	RATETAB_ENT(B43legacy_OFDM_RATE_9MB, 0),
101 	RATETAB_ENT(B43legacy_OFDM_RATE_12MB, 0),
102 	RATETAB_ENT(B43legacy_OFDM_RATE_18MB, 0),
103 	RATETAB_ENT(B43legacy_OFDM_RATE_24MB, 0),
104 	RATETAB_ENT(B43legacy_OFDM_RATE_36MB, 0),
105 	RATETAB_ENT(B43legacy_OFDM_RATE_48MB, 0),
106 	RATETAB_ENT(B43legacy_OFDM_RATE_54MB, 0),
107 };
108 #define b43legacy_b_ratetable		(__b43legacy_ratetable + 0)
109 #define b43legacy_b_ratetable_size	4
110 #define b43legacy_g_ratetable		(__b43legacy_ratetable + 0)
111 #define b43legacy_g_ratetable_size	12
112 
113 #define CHANTAB_ENT(_chanid, _freq) \
114 	{							\
115 		.center_freq	= (_freq),			\
116 		.hw_value	= (_chanid),			\
117 	}
118 static struct ieee80211_channel b43legacy_bg_chantable[] = {
119 	CHANTAB_ENT(1, 2412),
120 	CHANTAB_ENT(2, 2417),
121 	CHANTAB_ENT(3, 2422),
122 	CHANTAB_ENT(4, 2427),
123 	CHANTAB_ENT(5, 2432),
124 	CHANTAB_ENT(6, 2437),
125 	CHANTAB_ENT(7, 2442),
126 	CHANTAB_ENT(8, 2447),
127 	CHANTAB_ENT(9, 2452),
128 	CHANTAB_ENT(10, 2457),
129 	CHANTAB_ENT(11, 2462),
130 	CHANTAB_ENT(12, 2467),
131 	CHANTAB_ENT(13, 2472),
132 	CHANTAB_ENT(14, 2484),
133 };
134 
135 static struct ieee80211_supported_band b43legacy_band_2GHz_BPHY = {
136 	.channels = b43legacy_bg_chantable,
137 	.n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
138 	.bitrates = b43legacy_b_ratetable,
139 	.n_bitrates = b43legacy_b_ratetable_size,
140 };
141 
142 static struct ieee80211_supported_band b43legacy_band_2GHz_GPHY = {
143 	.channels = b43legacy_bg_chantable,
144 	.n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
145 	.bitrates = b43legacy_g_ratetable,
146 	.n_bitrates = b43legacy_g_ratetable_size,
147 };
148 
149 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev);
150 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev);
151 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev);
152 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev);
153 
154 
b43legacy_ratelimit(struct b43legacy_wl * wl)155 static int b43legacy_ratelimit(struct b43legacy_wl *wl)
156 {
157 	if (!wl || !wl->current_dev)
158 		return 1;
159 	if (b43legacy_status(wl->current_dev) < B43legacy_STAT_STARTED)
160 		return 1;
161 	/* We are up and running.
162 	 * Ratelimit the messages to avoid DoS over the net. */
163 	return net_ratelimit();
164 }
165 
b43legacyinfo(struct b43legacy_wl * wl,const char * fmt,...)166 void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
167 {
168 	struct va_format vaf;
169 	va_list args;
170 
171 	if (!b43legacy_ratelimit(wl))
172 		return;
173 
174 	va_start(args, fmt);
175 
176 	vaf.fmt = fmt;
177 	vaf.va = &args;
178 
179 	printk(KERN_INFO "b43legacy-%s: %pV",
180 	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
181 
182 	va_end(args);
183 }
184 
b43legacyerr(struct b43legacy_wl * wl,const char * fmt,...)185 void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
186 {
187 	struct va_format vaf;
188 	va_list args;
189 
190 	if (!b43legacy_ratelimit(wl))
191 		return;
192 
193 	va_start(args, fmt);
194 
195 	vaf.fmt = fmt;
196 	vaf.va = &args;
197 
198 	printk(KERN_ERR "b43legacy-%s ERROR: %pV",
199 	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
200 
201 	va_end(args);
202 }
203 
b43legacywarn(struct b43legacy_wl * wl,const char * fmt,...)204 void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
205 {
206 	struct va_format vaf;
207 	va_list args;
208 
209 	if (!b43legacy_ratelimit(wl))
210 		return;
211 
212 	va_start(args, fmt);
213 
214 	vaf.fmt = fmt;
215 	vaf.va = &args;
216 
217 	printk(KERN_WARNING "b43legacy-%s warning: %pV",
218 	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
219 
220 	va_end(args);
221 }
222 
223 #if B43legacy_DEBUG
b43legacydbg(struct b43legacy_wl * wl,const char * fmt,...)224 void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
225 {
226 	struct va_format vaf;
227 	va_list args;
228 
229 	va_start(args, fmt);
230 
231 	vaf.fmt = fmt;
232 	vaf.va = &args;
233 
234 	printk(KERN_DEBUG "b43legacy-%s debug: %pV",
235 	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
236 
237 	va_end(args);
238 }
239 #endif /* DEBUG */
240 
b43legacy_ram_write(struct b43legacy_wldev * dev,u16 offset,u32 val)241 static void b43legacy_ram_write(struct b43legacy_wldev *dev, u16 offset,
242 				u32 val)
243 {
244 	u32 status;
245 
246 	B43legacy_WARN_ON(offset % 4 != 0);
247 
248 	status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
249 	if (status & B43legacy_MACCTL_BE)
250 		val = swab32(val);
251 
252 	b43legacy_write32(dev, B43legacy_MMIO_RAM_CONTROL, offset);
253 	b43legacy_write32(dev, B43legacy_MMIO_RAM_DATA, val);
254 }
255 
256 static inline
b43legacy_shm_control_word(struct b43legacy_wldev * dev,u16 routing,u16 offset)257 void b43legacy_shm_control_word(struct b43legacy_wldev *dev,
258 				u16 routing, u16 offset)
259 {
260 	u32 control;
261 
262 	/* "offset" is the WORD offset. */
263 
264 	control = routing;
265 	control <<= 16;
266 	control |= offset;
267 	b43legacy_write32(dev, B43legacy_MMIO_SHM_CONTROL, control);
268 }
269 
b43legacy_shm_read32(struct b43legacy_wldev * dev,u16 routing,u16 offset)270 u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
271 		       u16 routing, u16 offset)
272 {
273 	u32 ret;
274 
275 	if (routing == B43legacy_SHM_SHARED) {
276 		B43legacy_WARN_ON((offset & 0x0001) != 0);
277 		if (offset & 0x0003) {
278 			/* Unaligned access */
279 			b43legacy_shm_control_word(dev, routing, offset >> 2);
280 			ret = b43legacy_read16(dev,
281 				B43legacy_MMIO_SHM_DATA_UNALIGNED);
282 			ret <<= 16;
283 			b43legacy_shm_control_word(dev, routing,
284 						     (offset >> 2) + 1);
285 			ret |= b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
286 
287 			return ret;
288 		}
289 		offset >>= 2;
290 	}
291 	b43legacy_shm_control_word(dev, routing, offset);
292 	ret = b43legacy_read32(dev, B43legacy_MMIO_SHM_DATA);
293 
294 	return ret;
295 }
296 
b43legacy_shm_read16(struct b43legacy_wldev * dev,u16 routing,u16 offset)297 u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
298 			   u16 routing, u16 offset)
299 {
300 	u16 ret;
301 
302 	if (routing == B43legacy_SHM_SHARED) {
303 		B43legacy_WARN_ON((offset & 0x0001) != 0);
304 		if (offset & 0x0003) {
305 			/* Unaligned access */
306 			b43legacy_shm_control_word(dev, routing, offset >> 2);
307 			ret = b43legacy_read16(dev,
308 					     B43legacy_MMIO_SHM_DATA_UNALIGNED);
309 
310 			return ret;
311 		}
312 		offset >>= 2;
313 	}
314 	b43legacy_shm_control_word(dev, routing, offset);
315 	ret = b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
316 
317 	return ret;
318 }
319 
b43legacy_shm_write32(struct b43legacy_wldev * dev,u16 routing,u16 offset,u32 value)320 void b43legacy_shm_write32(struct b43legacy_wldev *dev,
321 			   u16 routing, u16 offset,
322 			   u32 value)
323 {
324 	if (routing == B43legacy_SHM_SHARED) {
325 		B43legacy_WARN_ON((offset & 0x0001) != 0);
326 		if (offset & 0x0003) {
327 			/* Unaligned access */
328 			b43legacy_shm_control_word(dev, routing, offset >> 2);
329 			b43legacy_write16(dev,
330 					  B43legacy_MMIO_SHM_DATA_UNALIGNED,
331 					  (value >> 16) & 0xffff);
332 			b43legacy_shm_control_word(dev, routing,
333 						   (offset >> 2) + 1);
334 			b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA,
335 					  value & 0xffff);
336 			return;
337 		}
338 		offset >>= 2;
339 	}
340 	b43legacy_shm_control_word(dev, routing, offset);
341 	b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, value);
342 }
343 
b43legacy_shm_write16(struct b43legacy_wldev * dev,u16 routing,u16 offset,u16 value)344 void b43legacy_shm_write16(struct b43legacy_wldev *dev, u16 routing, u16 offset,
345 			   u16 value)
346 {
347 	if (routing == B43legacy_SHM_SHARED) {
348 		B43legacy_WARN_ON((offset & 0x0001) != 0);
349 		if (offset & 0x0003) {
350 			/* Unaligned access */
351 			b43legacy_shm_control_word(dev, routing, offset >> 2);
352 			b43legacy_write16(dev,
353 					  B43legacy_MMIO_SHM_DATA_UNALIGNED,
354 					  value);
355 			return;
356 		}
357 		offset >>= 2;
358 	}
359 	b43legacy_shm_control_word(dev, routing, offset);
360 	b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA, value);
361 }
362 
363 /* Read HostFlags */
b43legacy_hf_read(struct b43legacy_wldev * dev)364 u32 b43legacy_hf_read(struct b43legacy_wldev *dev)
365 {
366 	u32 ret;
367 
368 	ret = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
369 				   B43legacy_SHM_SH_HOSTFHI);
370 	ret <<= 16;
371 	ret |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
372 				    B43legacy_SHM_SH_HOSTFLO);
373 
374 	return ret;
375 }
376 
377 /* Write HostFlags */
b43legacy_hf_write(struct b43legacy_wldev * dev,u32 value)378 void b43legacy_hf_write(struct b43legacy_wldev *dev, u32 value)
379 {
380 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
381 			      B43legacy_SHM_SH_HOSTFLO,
382 			      (value & 0x0000FFFF));
383 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
384 			      B43legacy_SHM_SH_HOSTFHI,
385 			      ((value & 0xFFFF0000) >> 16));
386 }
387 
b43legacy_tsf_read(struct b43legacy_wldev * dev,u64 * tsf)388 void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf)
389 {
390 	/* We need to be careful. As we read the TSF from multiple
391 	 * registers, we should take care of register overflows.
392 	 * In theory, the whole tsf read process should be atomic.
393 	 * We try to be atomic here, by restaring the read process,
394 	 * if any of the high registers changed (overflowed).
395 	 */
396 	if (dev->dev->id.revision >= 3) {
397 		u32 low;
398 		u32 high;
399 		u32 high2;
400 
401 		do {
402 			high = b43legacy_read32(dev,
403 					B43legacy_MMIO_REV3PLUS_TSF_HIGH);
404 			low = b43legacy_read32(dev,
405 					B43legacy_MMIO_REV3PLUS_TSF_LOW);
406 			high2 = b43legacy_read32(dev,
407 					B43legacy_MMIO_REV3PLUS_TSF_HIGH);
408 		} while (unlikely(high != high2));
409 
410 		*tsf = high;
411 		*tsf <<= 32;
412 		*tsf |= low;
413 	} else {
414 		u64 tmp;
415 		u16 v0;
416 		u16 v1;
417 		u16 v2;
418 		u16 v3;
419 		u16 test1;
420 		u16 test2;
421 		u16 test3;
422 
423 		do {
424 			v3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
425 			v2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
426 			v1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
427 			v0 = b43legacy_read16(dev, B43legacy_MMIO_TSF_0);
428 
429 			test3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
430 			test2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
431 			test1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
432 		} while (v3 != test3 || v2 != test2 || v1 != test1);
433 
434 		*tsf = v3;
435 		*tsf <<= 48;
436 		tmp = v2;
437 		tmp <<= 32;
438 		*tsf |= tmp;
439 		tmp = v1;
440 		tmp <<= 16;
441 		*tsf |= tmp;
442 		*tsf |= v0;
443 	}
444 }
445 
b43legacy_time_lock(struct b43legacy_wldev * dev)446 static void b43legacy_time_lock(struct b43legacy_wldev *dev)
447 {
448 	u32 status;
449 
450 	status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
451 	status |= B43legacy_MACCTL_TBTTHOLD;
452 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
453 }
454 
b43legacy_time_unlock(struct b43legacy_wldev * dev)455 static void b43legacy_time_unlock(struct b43legacy_wldev *dev)
456 {
457 	u32 status;
458 
459 	status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
460 	status &= ~B43legacy_MACCTL_TBTTHOLD;
461 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
462 }
463 
b43legacy_tsf_write_locked(struct b43legacy_wldev * dev,u64 tsf)464 static void b43legacy_tsf_write_locked(struct b43legacy_wldev *dev, u64 tsf)
465 {
466 	/* Be careful with the in-progress timer.
467 	 * First zero out the low register, so we have a full
468 	 * register-overflow duration to complete the operation.
469 	 */
470 	if (dev->dev->id.revision >= 3) {
471 		u32 lo = (tsf & 0x00000000FFFFFFFFULL);
472 		u32 hi = (tsf & 0xFFFFFFFF00000000ULL) >> 32;
473 
474 		b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW, 0);
475 		b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_HIGH,
476 				    hi);
477 		b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW,
478 				    lo);
479 	} else {
480 		u16 v0 = (tsf & 0x000000000000FFFFULL);
481 		u16 v1 = (tsf & 0x00000000FFFF0000ULL) >> 16;
482 		u16 v2 = (tsf & 0x0000FFFF00000000ULL) >> 32;
483 		u16 v3 = (tsf & 0xFFFF000000000000ULL) >> 48;
484 
485 		b43legacy_write16(dev, B43legacy_MMIO_TSF_0, 0);
486 		b43legacy_write16(dev, B43legacy_MMIO_TSF_3, v3);
487 		b43legacy_write16(dev, B43legacy_MMIO_TSF_2, v2);
488 		b43legacy_write16(dev, B43legacy_MMIO_TSF_1, v1);
489 		b43legacy_write16(dev, B43legacy_MMIO_TSF_0, v0);
490 	}
491 }
492 
b43legacy_tsf_write(struct b43legacy_wldev * dev,u64 tsf)493 void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf)
494 {
495 	b43legacy_time_lock(dev);
496 	b43legacy_tsf_write_locked(dev, tsf);
497 	b43legacy_time_unlock(dev);
498 }
499 
500 static
b43legacy_macfilter_set(struct b43legacy_wldev * dev,u16 offset,const u8 * mac)501 void b43legacy_macfilter_set(struct b43legacy_wldev *dev,
502 			     u16 offset, const u8 *mac)
503 {
504 	static const u8 zero_addr[ETH_ALEN] = { 0 };
505 	u16 data;
506 
507 	if (!mac)
508 		mac = zero_addr;
509 
510 	offset |= 0x0020;
511 	b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_CONTROL, offset);
512 
513 	data = mac[0];
514 	data |= mac[1] << 8;
515 	b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
516 	data = mac[2];
517 	data |= mac[3] << 8;
518 	b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
519 	data = mac[4];
520 	data |= mac[5] << 8;
521 	b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
522 }
523 
b43legacy_write_mac_bssid_templates(struct b43legacy_wldev * dev)524 static void b43legacy_write_mac_bssid_templates(struct b43legacy_wldev *dev)
525 {
526 	static const u8 zero_addr[ETH_ALEN] = { 0 };
527 	const u8 *mac = dev->wl->mac_addr;
528 	const u8 *bssid = dev->wl->bssid;
529 	u8 mac_bssid[ETH_ALEN * 2];
530 	int i;
531 	u32 tmp;
532 
533 	if (!bssid)
534 		bssid = zero_addr;
535 	if (!mac)
536 		mac = zero_addr;
537 
538 	b43legacy_macfilter_set(dev, B43legacy_MACFILTER_BSSID, bssid);
539 
540 	memcpy(mac_bssid, mac, ETH_ALEN);
541 	memcpy(mac_bssid + ETH_ALEN, bssid, ETH_ALEN);
542 
543 	/* Write our MAC address and BSSID to template ram */
544 	for (i = 0; i < ARRAY_SIZE(mac_bssid); i += sizeof(u32)) {
545 		tmp =  (u32)(mac_bssid[i + 0]);
546 		tmp |= (u32)(mac_bssid[i + 1]) << 8;
547 		tmp |= (u32)(mac_bssid[i + 2]) << 16;
548 		tmp |= (u32)(mac_bssid[i + 3]) << 24;
549 		b43legacy_ram_write(dev, 0x20 + i, tmp);
550 		b43legacy_ram_write(dev, 0x78 + i, tmp);
551 		b43legacy_ram_write(dev, 0x478 + i, tmp);
552 	}
553 }
554 
b43legacy_upload_card_macaddress(struct b43legacy_wldev * dev)555 static void b43legacy_upload_card_macaddress(struct b43legacy_wldev *dev)
556 {
557 	b43legacy_write_mac_bssid_templates(dev);
558 	b43legacy_macfilter_set(dev, B43legacy_MACFILTER_SELF,
559 				dev->wl->mac_addr);
560 }
561 
b43legacy_set_slot_time(struct b43legacy_wldev * dev,u16 slot_time)562 static void b43legacy_set_slot_time(struct b43legacy_wldev *dev,
563 				    u16 slot_time)
564 {
565 	/* slot_time is in usec. */
566 	if (dev->phy.type != B43legacy_PHYTYPE_G)
567 		return;
568 	b43legacy_write16(dev, 0x684, 510 + slot_time);
569 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0010,
570 			      slot_time);
571 }
572 
b43legacy_short_slot_timing_enable(struct b43legacy_wldev * dev)573 static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
574 {
575 	b43legacy_set_slot_time(dev, 9);
576 }
577 
b43legacy_short_slot_timing_disable(struct b43legacy_wldev * dev)578 static void b43legacy_short_slot_timing_disable(struct b43legacy_wldev *dev)
579 {
580 	b43legacy_set_slot_time(dev, 20);
581 }
582 
583 /* Synchronize IRQ top- and bottom-half.
584  * IRQs must be masked before calling this.
585  * This must not be called with the irq_lock held.
586  */
b43legacy_synchronize_irq(struct b43legacy_wldev * dev)587 static void b43legacy_synchronize_irq(struct b43legacy_wldev *dev)
588 {
589 	synchronize_irq(dev->dev->irq);
590 	tasklet_kill(&dev->isr_tasklet);
591 }
592 
593 /* DummyTransmission function, as documented on
594  * https://bcm-specs.sipsolutions.net/DummyTransmission
595  */
b43legacy_dummy_transmission(struct b43legacy_wldev * dev)596 void b43legacy_dummy_transmission(struct b43legacy_wldev *dev)
597 {
598 	struct b43legacy_phy *phy = &dev->phy;
599 	unsigned int i;
600 	unsigned int max_loop;
601 	u16 value;
602 	u32 buffer[5] = {
603 		0x00000000,
604 		0x00D40000,
605 		0x00000000,
606 		0x01000000,
607 		0x00000000,
608 	};
609 
610 	switch (phy->type) {
611 	case B43legacy_PHYTYPE_B:
612 	case B43legacy_PHYTYPE_G:
613 		max_loop = 0xFA;
614 		buffer[0] = 0x000B846E;
615 		break;
616 	default:
617 		B43legacy_BUG_ON(1);
618 		return;
619 	}
620 
621 	for (i = 0; i < 5; i++)
622 		b43legacy_ram_write(dev, i * 4, buffer[i]);
623 
624 	/* dummy read follows */
625 	b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
626 
627 	b43legacy_write16(dev, 0x0568, 0x0000);
628 	b43legacy_write16(dev, 0x07C0, 0x0000);
629 	b43legacy_write16(dev, 0x050C, 0x0000);
630 	b43legacy_write16(dev, 0x0508, 0x0000);
631 	b43legacy_write16(dev, 0x050A, 0x0000);
632 	b43legacy_write16(dev, 0x054C, 0x0000);
633 	b43legacy_write16(dev, 0x056A, 0x0014);
634 	b43legacy_write16(dev, 0x0568, 0x0826);
635 	b43legacy_write16(dev, 0x0500, 0x0000);
636 	b43legacy_write16(dev, 0x0502, 0x0030);
637 
638 	if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
639 		b43legacy_radio_write16(dev, 0x0051, 0x0017);
640 	for (i = 0x00; i < max_loop; i++) {
641 		value = b43legacy_read16(dev, 0x050E);
642 		if (value & 0x0080)
643 			break;
644 		udelay(10);
645 	}
646 	for (i = 0x00; i < 0x0A; i++) {
647 		value = b43legacy_read16(dev, 0x050E);
648 		if (value & 0x0400)
649 			break;
650 		udelay(10);
651 	}
652 	for (i = 0x00; i < 0x0A; i++) {
653 		value = b43legacy_read16(dev, 0x0690);
654 		if (!(value & 0x0100))
655 			break;
656 		udelay(10);
657 	}
658 	if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
659 		b43legacy_radio_write16(dev, 0x0051, 0x0037);
660 }
661 
662 /* Turn the Analog ON/OFF */
b43legacy_switch_analog(struct b43legacy_wldev * dev,int on)663 static void b43legacy_switch_analog(struct b43legacy_wldev *dev, int on)
664 {
665 	b43legacy_write16(dev, B43legacy_MMIO_PHY0, on ? 0 : 0xF4);
666 }
667 
b43legacy_wireless_core_reset(struct b43legacy_wldev * dev,u32 flags)668 void b43legacy_wireless_core_reset(struct b43legacy_wldev *dev, u32 flags)
669 {
670 	u32 tmslow;
671 	u32 macctl;
672 
673 	flags |= B43legacy_TMSLOW_PHYCLKEN;
674 	flags |= B43legacy_TMSLOW_PHYRESET;
675 	ssb_device_enable(dev->dev, flags);
676 	msleep(2); /* Wait for the PLL to turn on. */
677 
678 	/* Now take the PHY out of Reset again */
679 	tmslow = ssb_read32(dev->dev, SSB_TMSLOW);
680 	tmslow |= SSB_TMSLOW_FGC;
681 	tmslow &= ~B43legacy_TMSLOW_PHYRESET;
682 	ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
683 	ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
684 	msleep(1);
685 	tmslow &= ~SSB_TMSLOW_FGC;
686 	ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
687 	ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
688 	msleep(1);
689 
690 	/* Turn Analog ON */
691 	b43legacy_switch_analog(dev, 1);
692 
693 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
694 	macctl &= ~B43legacy_MACCTL_GMODE;
695 	if (flags & B43legacy_TMSLOW_GMODE) {
696 		macctl |= B43legacy_MACCTL_GMODE;
697 		dev->phy.gmode = true;
698 	} else
699 		dev->phy.gmode = false;
700 	macctl |= B43legacy_MACCTL_IHR_ENABLED;
701 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
702 }
703 
handle_irq_transmit_status(struct b43legacy_wldev * dev)704 static void handle_irq_transmit_status(struct b43legacy_wldev *dev)
705 {
706 	u32 v0;
707 	u32 v1;
708 	u16 tmp;
709 	struct b43legacy_txstatus stat;
710 
711 	while (1) {
712 		v0 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
713 		if (!(v0 & 0x00000001))
714 			break;
715 		v1 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
716 
717 		stat.cookie = (v0 >> 16);
718 		stat.seq = (v1 & 0x0000FFFF);
719 		stat.phy_stat = ((v1 & 0x00FF0000) >> 16);
720 		tmp = (v0 & 0x0000FFFF);
721 		stat.frame_count = ((tmp & 0xF000) >> 12);
722 		stat.rts_count = ((tmp & 0x0F00) >> 8);
723 		stat.supp_reason = ((tmp & 0x001C) >> 2);
724 		stat.pm_indicated = !!(tmp & 0x0080);
725 		stat.intermediate = !!(tmp & 0x0040);
726 		stat.for_ampdu = !!(tmp & 0x0020);
727 		stat.acked = !!(tmp & 0x0002);
728 
729 		b43legacy_handle_txstatus(dev, &stat);
730 	}
731 }
732 
drain_txstatus_queue(struct b43legacy_wldev * dev)733 static void drain_txstatus_queue(struct b43legacy_wldev *dev)
734 {
735 	u32 dummy;
736 
737 	if (dev->dev->id.revision < 5)
738 		return;
739 	/* Read all entries from the microcode TXstatus FIFO
740 	 * and throw them away.
741 	 */
742 	while (1) {
743 		dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
744 		if (!(dummy & 0x00000001))
745 			break;
746 		dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
747 	}
748 }
749 
b43legacy_jssi_read(struct b43legacy_wldev * dev)750 static u32 b43legacy_jssi_read(struct b43legacy_wldev *dev)
751 {
752 	u32 val = 0;
753 
754 	val = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x40A);
755 	val <<= 16;
756 	val |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x408);
757 
758 	return val;
759 }
760 
b43legacy_jssi_write(struct b43legacy_wldev * dev,u32 jssi)761 static void b43legacy_jssi_write(struct b43legacy_wldev *dev, u32 jssi)
762 {
763 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x408,
764 			      (jssi & 0x0000FFFF));
765 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x40A,
766 			      (jssi & 0xFFFF0000) >> 16);
767 }
768 
b43legacy_generate_noise_sample(struct b43legacy_wldev * dev)769 static void b43legacy_generate_noise_sample(struct b43legacy_wldev *dev)
770 {
771 	b43legacy_jssi_write(dev, 0x7F7F7F7F);
772 	b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
773 			  b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
774 			  | B43legacy_MACCMD_BGNOISE);
775 	B43legacy_WARN_ON(dev->noisecalc.channel_at_start !=
776 			    dev->phy.channel);
777 }
778 
b43legacy_calculate_link_quality(struct b43legacy_wldev * dev)779 static void b43legacy_calculate_link_quality(struct b43legacy_wldev *dev)
780 {
781 	/* Top half of Link Quality calculation. */
782 
783 	if (dev->noisecalc.calculation_running)
784 		return;
785 	dev->noisecalc.channel_at_start = dev->phy.channel;
786 	dev->noisecalc.calculation_running = true;
787 	dev->noisecalc.nr_samples = 0;
788 
789 	b43legacy_generate_noise_sample(dev);
790 }
791 
handle_irq_noise(struct b43legacy_wldev * dev)792 static void handle_irq_noise(struct b43legacy_wldev *dev)
793 {
794 	struct b43legacy_phy *phy = &dev->phy;
795 	u16 tmp;
796 	u8 noise[4];
797 	u8 i;
798 	u8 j;
799 	s32 average;
800 
801 	/* Bottom half of Link Quality calculation. */
802 
803 	B43legacy_WARN_ON(!dev->noisecalc.calculation_running);
804 	if (dev->noisecalc.channel_at_start != phy->channel)
805 		goto drop_calculation;
806 	*((__le32 *)noise) = cpu_to_le32(b43legacy_jssi_read(dev));
807 	if (noise[0] == 0x7F || noise[1] == 0x7F ||
808 	    noise[2] == 0x7F || noise[3] == 0x7F)
809 		goto generate_new;
810 
811 	/* Get the noise samples. */
812 	B43legacy_WARN_ON(dev->noisecalc.nr_samples >= 8);
813 	i = dev->noisecalc.nr_samples;
814 	noise[0] = clamp_val(noise[0], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
815 	noise[1] = clamp_val(noise[1], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
816 	noise[2] = clamp_val(noise[2], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
817 	noise[3] = clamp_val(noise[3], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
818 	dev->noisecalc.samples[i][0] = phy->nrssi_lt[noise[0]];
819 	dev->noisecalc.samples[i][1] = phy->nrssi_lt[noise[1]];
820 	dev->noisecalc.samples[i][2] = phy->nrssi_lt[noise[2]];
821 	dev->noisecalc.samples[i][3] = phy->nrssi_lt[noise[3]];
822 	dev->noisecalc.nr_samples++;
823 	if (dev->noisecalc.nr_samples == 8) {
824 		/* Calculate the Link Quality by the noise samples. */
825 		average = 0;
826 		for (i = 0; i < 8; i++) {
827 			for (j = 0; j < 4; j++)
828 				average += dev->noisecalc.samples[i][j];
829 		}
830 		average /= (8 * 4);
831 		average *= 125;
832 		average += 64;
833 		average /= 128;
834 		tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
835 					     0x40C);
836 		tmp = (tmp / 128) & 0x1F;
837 		if (tmp >= 8)
838 			average += 2;
839 		else
840 			average -= 25;
841 		if (tmp == 8)
842 			average -= 72;
843 		else
844 			average -= 48;
845 
846 		dev->stats.link_noise = average;
847 drop_calculation:
848 		dev->noisecalc.calculation_running = false;
849 		return;
850 	}
851 generate_new:
852 	b43legacy_generate_noise_sample(dev);
853 }
854 
handle_irq_tbtt_indication(struct b43legacy_wldev * dev)855 static void handle_irq_tbtt_indication(struct b43legacy_wldev *dev)
856 {
857 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP)) {
858 		/* TODO: PS TBTT */
859 	} else {
860 		if (1/*FIXME: the last PSpoll frame was sent successfully */)
861 			b43legacy_power_saving_ctl_bits(dev, -1, -1);
862 	}
863 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
864 		dev->dfq_valid = true;
865 }
866 
handle_irq_atim_end(struct b43legacy_wldev * dev)867 static void handle_irq_atim_end(struct b43legacy_wldev *dev)
868 {
869 	if (dev->dfq_valid) {
870 		b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
871 				  b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
872 				  | B43legacy_MACCMD_DFQ_VALID);
873 		dev->dfq_valid = false;
874 	}
875 }
876 
handle_irq_pmq(struct b43legacy_wldev * dev)877 static void handle_irq_pmq(struct b43legacy_wldev *dev)
878 {
879 	u32 tmp;
880 
881 	/* TODO: AP mode. */
882 
883 	while (1) {
884 		tmp = b43legacy_read32(dev, B43legacy_MMIO_PS_STATUS);
885 		if (!(tmp & 0x00000008))
886 			break;
887 	}
888 	/* 16bit write is odd, but correct. */
889 	b43legacy_write16(dev, B43legacy_MMIO_PS_STATUS, 0x0002);
890 }
891 
b43legacy_write_template_common(struct b43legacy_wldev * dev,const u8 * data,u16 size,u16 ram_offset,u16 shm_size_offset,u8 rate)892 static void b43legacy_write_template_common(struct b43legacy_wldev *dev,
893 					    const u8 *data, u16 size,
894 					    u16 ram_offset,
895 					    u16 shm_size_offset, u8 rate)
896 {
897 	u32 i;
898 	u32 tmp;
899 	struct b43legacy_plcp_hdr4 plcp;
900 
901 	plcp.data = 0;
902 	b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate);
903 	b43legacy_ram_write(dev, ram_offset, le32_to_cpu(plcp.data));
904 	ram_offset += sizeof(u32);
905 	/* The PLCP is 6 bytes long, but we only wrote 4 bytes, yet.
906 	 * So leave the first two bytes of the next write blank.
907 	 */
908 	tmp = (u32)(data[0]) << 16;
909 	tmp |= (u32)(data[1]) << 24;
910 	b43legacy_ram_write(dev, ram_offset, tmp);
911 	ram_offset += sizeof(u32);
912 	for (i = 2; i < size; i += sizeof(u32)) {
913 		tmp = (u32)(data[i + 0]);
914 		if (i + 1 < size)
915 			tmp |= (u32)(data[i + 1]) << 8;
916 		if (i + 2 < size)
917 			tmp |= (u32)(data[i + 2]) << 16;
918 		if (i + 3 < size)
919 			tmp |= (u32)(data[i + 3]) << 24;
920 		b43legacy_ram_write(dev, ram_offset + i - 2, tmp);
921 	}
922 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_size_offset,
923 			      size + sizeof(struct b43legacy_plcp_hdr6));
924 }
925 
926 /* Convert a b43legacy antenna number value to the PHY TX control value. */
b43legacy_antenna_to_phyctl(int antenna)927 static u16 b43legacy_antenna_to_phyctl(int antenna)
928 {
929 	switch (antenna) {
930 	case B43legacy_ANTENNA0:
931 		return B43legacy_TX4_PHY_ANT0;
932 	case B43legacy_ANTENNA1:
933 		return B43legacy_TX4_PHY_ANT1;
934 	}
935 	return B43legacy_TX4_PHY_ANTLAST;
936 }
937 
b43legacy_write_beacon_template(struct b43legacy_wldev * dev,u16 ram_offset,u16 shm_size_offset)938 static void b43legacy_write_beacon_template(struct b43legacy_wldev *dev,
939 					    u16 ram_offset,
940 					    u16 shm_size_offset)
941 {
942 
943 	unsigned int i, len, variable_len;
944 	const struct ieee80211_mgmt *bcn;
945 	const u8 *ie;
946 	bool tim_found = false;
947 	unsigned int rate;
948 	u16 ctl;
949 	int antenna;
950 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(dev->wl->current_beacon);
951 
952 	bcn = (const struct ieee80211_mgmt *)(dev->wl->current_beacon->data);
953 	len = min_t(size_t, dev->wl->current_beacon->len,
954 		  0x200 - sizeof(struct b43legacy_plcp_hdr6));
955 	rate = ieee80211_get_tx_rate(dev->wl->hw, info)->hw_value;
956 
957 	b43legacy_write_template_common(dev, (const u8 *)bcn, len, ram_offset,
958 					shm_size_offset, rate);
959 
960 	/* Write the PHY TX control parameters. */
961 	antenna = B43legacy_ANTENNA_DEFAULT;
962 	antenna = b43legacy_antenna_to_phyctl(antenna);
963 	ctl = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
964 				   B43legacy_SHM_SH_BEACPHYCTL);
965 	/* We can't send beacons with short preamble. Would get PHY errors. */
966 	ctl &= ~B43legacy_TX4_PHY_SHORTPRMBL;
967 	ctl &= ~B43legacy_TX4_PHY_ANT;
968 	ctl &= ~B43legacy_TX4_PHY_ENC;
969 	ctl |= antenna;
970 	ctl |= B43legacy_TX4_PHY_ENC_CCK;
971 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
972 			      B43legacy_SHM_SH_BEACPHYCTL, ctl);
973 
974 	/* Find the position of the TIM and the DTIM_period value
975 	 * and write them to SHM. */
976 	ie = bcn->u.beacon.variable;
977 	variable_len = len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
978 	for (i = 0; i < variable_len - 2; ) {
979 		uint8_t ie_id, ie_len;
980 
981 		ie_id = ie[i];
982 		ie_len = ie[i + 1];
983 		if (ie_id == 5) {
984 			u16 tim_position;
985 			u16 dtim_period;
986 			/* This is the TIM Information Element */
987 
988 			/* Check whether the ie_len is in the beacon data range. */
989 			if (variable_len < ie_len + 2 + i)
990 				break;
991 			/* A valid TIM is at least 4 bytes long. */
992 			if (ie_len < 4)
993 				break;
994 			tim_found = true;
995 
996 			tim_position = sizeof(struct b43legacy_plcp_hdr6);
997 			tim_position += offsetof(struct ieee80211_mgmt,
998 						 u.beacon.variable);
999 			tim_position += i;
1000 
1001 			dtim_period = ie[i + 3];
1002 
1003 			b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1004 					B43legacy_SHM_SH_TIMPOS, tim_position);
1005 			b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
1006 					B43legacy_SHM_SH_DTIMP, dtim_period);
1007 			break;
1008 		}
1009 		i += ie_len + 2;
1010 	}
1011 	if (!tim_found) {
1012 		b43legacywarn(dev->wl, "Did not find a valid TIM IE in the "
1013 			      "beacon template packet. AP or IBSS operation "
1014 			      "may be broken.\n");
1015 	} else
1016 		b43legacydbg(dev->wl, "Updated beacon template\n");
1017 }
1018 
b43legacy_write_probe_resp_plcp(struct b43legacy_wldev * dev,u16 shm_offset,u16 size,struct ieee80211_rate * rate)1019 static void b43legacy_write_probe_resp_plcp(struct b43legacy_wldev *dev,
1020 					    u16 shm_offset, u16 size,
1021 					    struct ieee80211_rate *rate)
1022 {
1023 	struct b43legacy_plcp_hdr4 plcp;
1024 	u32 tmp;
1025 	__le16 dur;
1026 
1027 	plcp.data = 0;
1028 	b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate->hw_value);
1029 	dur = ieee80211_generic_frame_duration(dev->wl->hw,
1030 					       dev->wl->vif,
1031 					       NL80211_BAND_2GHZ,
1032 					       size,
1033 					       rate);
1034 	/* Write PLCP in two parts and timing for packet transfer */
1035 	tmp = le32_to_cpu(plcp.data);
1036 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset,
1037 			      tmp & 0xFFFF);
1038 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 2,
1039 			      tmp >> 16);
1040 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 6,
1041 			      le16_to_cpu(dur));
1042 }
1043 
1044 /* Instead of using custom probe response template, this function
1045  * just patches custom beacon template by:
1046  * 1) Changing packet type
1047  * 2) Patching duration field
1048  * 3) Stripping TIM
1049  */
b43legacy_generate_probe_resp(struct b43legacy_wldev * dev,u16 * dest_size,struct ieee80211_rate * rate)1050 static const u8 *b43legacy_generate_probe_resp(struct b43legacy_wldev *dev,
1051 					       u16 *dest_size,
1052 					       struct ieee80211_rate *rate)
1053 {
1054 	const u8 *src_data;
1055 	u8 *dest_data;
1056 	u16 src_size, elem_size, src_pos, dest_pos;
1057 	__le16 dur;
1058 	struct ieee80211_hdr *hdr;
1059 	size_t ie_start;
1060 
1061 	src_size = dev->wl->current_beacon->len;
1062 	src_data = (const u8 *)dev->wl->current_beacon->data;
1063 
1064 	/* Get the start offset of the variable IEs in the packet. */
1065 	ie_start = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1066 	B43legacy_WARN_ON(ie_start != offsetof(struct ieee80211_mgmt,
1067 					       u.beacon.variable));
1068 
1069 	if (B43legacy_WARN_ON(src_size < ie_start))
1070 		return NULL;
1071 
1072 	dest_data = kmalloc(src_size, GFP_ATOMIC);
1073 	if (unlikely(!dest_data))
1074 		return NULL;
1075 
1076 	/* Copy the static data and all Information Elements, except the TIM. */
1077 	memcpy(dest_data, src_data, ie_start);
1078 	src_pos = ie_start;
1079 	dest_pos = ie_start;
1080 	for ( ; src_pos < src_size - 2; src_pos += elem_size) {
1081 		elem_size = src_data[src_pos + 1] + 2;
1082 		if (src_data[src_pos] == 5) {
1083 			/* This is the TIM. */
1084 			continue;
1085 		}
1086 		memcpy(dest_data + dest_pos, src_data + src_pos, elem_size);
1087 		dest_pos += elem_size;
1088 	}
1089 	*dest_size = dest_pos;
1090 	hdr = (struct ieee80211_hdr *)dest_data;
1091 
1092 	/* Set the frame control. */
1093 	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1094 					 IEEE80211_STYPE_PROBE_RESP);
1095 	dur = ieee80211_generic_frame_duration(dev->wl->hw,
1096 					       dev->wl->vif,
1097 					       NL80211_BAND_2GHZ,
1098 					       *dest_size,
1099 					       rate);
1100 	hdr->duration_id = dur;
1101 
1102 	return dest_data;
1103 }
1104 
b43legacy_write_probe_resp_template(struct b43legacy_wldev * dev,u16 ram_offset,u16 shm_size_offset,struct ieee80211_rate * rate)1105 static void b43legacy_write_probe_resp_template(struct b43legacy_wldev *dev,
1106 						u16 ram_offset,
1107 						u16 shm_size_offset,
1108 						struct ieee80211_rate *rate)
1109 {
1110 	const u8 *probe_resp_data;
1111 	u16 size;
1112 
1113 	size = dev->wl->current_beacon->len;
1114 	probe_resp_data = b43legacy_generate_probe_resp(dev, &size, rate);
1115 	if (unlikely(!probe_resp_data))
1116 		return;
1117 
1118 	/* Looks like PLCP headers plus packet timings are stored for
1119 	 * all possible basic rates
1120 	 */
1121 	b43legacy_write_probe_resp_plcp(dev, 0x31A, size,
1122 					&b43legacy_b_ratetable[0]);
1123 	b43legacy_write_probe_resp_plcp(dev, 0x32C, size,
1124 					&b43legacy_b_ratetable[1]);
1125 	b43legacy_write_probe_resp_plcp(dev, 0x33E, size,
1126 					&b43legacy_b_ratetable[2]);
1127 	b43legacy_write_probe_resp_plcp(dev, 0x350, size,
1128 					&b43legacy_b_ratetable[3]);
1129 
1130 	size = min_t(size_t, size,
1131 		   0x200 - sizeof(struct b43legacy_plcp_hdr6));
1132 	b43legacy_write_template_common(dev, probe_resp_data,
1133 					size, ram_offset,
1134 					shm_size_offset, rate->hw_value);
1135 	kfree(probe_resp_data);
1136 }
1137 
b43legacy_upload_beacon0(struct b43legacy_wldev * dev)1138 static void b43legacy_upload_beacon0(struct b43legacy_wldev *dev)
1139 {
1140 	struct b43legacy_wl *wl = dev->wl;
1141 
1142 	if (wl->beacon0_uploaded)
1143 		return;
1144 	b43legacy_write_beacon_template(dev, 0x68, 0x18);
1145 	/* FIXME: Probe resp upload doesn't really belong here,
1146 	 *        but we don't use that feature anyway. */
1147 	b43legacy_write_probe_resp_template(dev, 0x268, 0x4A,
1148 				      &__b43legacy_ratetable[3]);
1149 	wl->beacon0_uploaded = true;
1150 }
1151 
b43legacy_upload_beacon1(struct b43legacy_wldev * dev)1152 static void b43legacy_upload_beacon1(struct b43legacy_wldev *dev)
1153 {
1154 	struct b43legacy_wl *wl = dev->wl;
1155 
1156 	if (wl->beacon1_uploaded)
1157 		return;
1158 	b43legacy_write_beacon_template(dev, 0x468, 0x1A);
1159 	wl->beacon1_uploaded = true;
1160 }
1161 
handle_irq_beacon(struct b43legacy_wldev * dev)1162 static void handle_irq_beacon(struct b43legacy_wldev *dev)
1163 {
1164 	struct b43legacy_wl *wl = dev->wl;
1165 	u32 cmd, beacon0_valid, beacon1_valid;
1166 
1167 	if (!b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
1168 		return;
1169 
1170 	/* This is the bottom half of the asynchronous beacon update. */
1171 
1172 	/* Ignore interrupt in the future. */
1173 	dev->irq_mask &= ~B43legacy_IRQ_BEACON;
1174 
1175 	cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1176 	beacon0_valid = (cmd & B43legacy_MACCMD_BEACON0_VALID);
1177 	beacon1_valid = (cmd & B43legacy_MACCMD_BEACON1_VALID);
1178 
1179 	/* Schedule interrupt manually, if busy. */
1180 	if (beacon0_valid && beacon1_valid) {
1181 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, B43legacy_IRQ_BEACON);
1182 		dev->irq_mask |= B43legacy_IRQ_BEACON;
1183 		return;
1184 	}
1185 
1186 	if (unlikely(wl->beacon_templates_virgin)) {
1187 		/* We never uploaded a beacon before.
1188 		 * Upload both templates now, but only mark one valid. */
1189 		wl->beacon_templates_virgin = false;
1190 		b43legacy_upload_beacon0(dev);
1191 		b43legacy_upload_beacon1(dev);
1192 		cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1193 		cmd |= B43legacy_MACCMD_BEACON0_VALID;
1194 		b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1195 	} else {
1196 		if (!beacon0_valid) {
1197 			b43legacy_upload_beacon0(dev);
1198 			cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1199 			cmd |= B43legacy_MACCMD_BEACON0_VALID;
1200 			b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1201 		} else if (!beacon1_valid) {
1202 			b43legacy_upload_beacon1(dev);
1203 			cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
1204 			cmd |= B43legacy_MACCMD_BEACON1_VALID;
1205 			b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
1206 		}
1207 	}
1208 }
1209 
b43legacy_beacon_update_trigger_work(struct work_struct * work)1210 static void b43legacy_beacon_update_trigger_work(struct work_struct *work)
1211 {
1212 	struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
1213 					 beacon_update_trigger);
1214 	struct b43legacy_wldev *dev;
1215 
1216 	mutex_lock(&wl->mutex);
1217 	dev = wl->current_dev;
1218 	if (likely(dev && (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED))) {
1219 		spin_lock_irq(&wl->irq_lock);
1220 		/* Update beacon right away or defer to IRQ. */
1221 		handle_irq_beacon(dev);
1222 		/* The handler might have updated the IRQ mask. */
1223 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
1224 				  dev->irq_mask);
1225 		spin_unlock_irq(&wl->irq_lock);
1226 	}
1227 	mutex_unlock(&wl->mutex);
1228 }
1229 
1230 /* Asynchronously update the packet templates in template RAM.
1231  * Locking: Requires wl->irq_lock to be locked. */
b43legacy_update_templates(struct b43legacy_wl * wl)1232 static void b43legacy_update_templates(struct b43legacy_wl *wl)
1233 {
1234 	struct sk_buff *beacon;
1235 	/* This is the top half of the ansynchronous beacon update. The bottom
1236 	 * half is the beacon IRQ. Beacon update must be asynchronous to avoid
1237 	 * sending an invalid beacon. This can happen for example, if the
1238 	 * firmware transmits a beacon while we are updating it. */
1239 
1240 	/* We could modify the existing beacon and set the aid bit in the TIM
1241 	 * field, but that would probably require resizing and moving of data
1242 	 * within the beacon template. Simply request a new beacon and let
1243 	 * mac80211 do the hard work. */
1244 	beacon = ieee80211_beacon_get(wl->hw, wl->vif, 0);
1245 	if (unlikely(!beacon))
1246 		return;
1247 
1248 	if (wl->current_beacon)
1249 		dev_kfree_skb_any(wl->current_beacon);
1250 	wl->current_beacon = beacon;
1251 	wl->beacon0_uploaded = false;
1252 	wl->beacon1_uploaded = false;
1253 	ieee80211_queue_work(wl->hw, &wl->beacon_update_trigger);
1254 }
1255 
b43legacy_set_beacon_int(struct b43legacy_wldev * dev,u16 beacon_int)1256 static void b43legacy_set_beacon_int(struct b43legacy_wldev *dev,
1257 				     u16 beacon_int)
1258 {
1259 	b43legacy_time_lock(dev);
1260 	if (dev->dev->id.revision >= 3) {
1261 		b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_REP,
1262 				 (beacon_int << 16));
1263 		b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_START,
1264 				 (beacon_int << 10));
1265 	} else {
1266 		b43legacy_write16(dev, 0x606, (beacon_int >> 6));
1267 		b43legacy_write16(dev, 0x610, beacon_int);
1268 	}
1269 	b43legacy_time_unlock(dev);
1270 	b43legacydbg(dev->wl, "Set beacon interval to %u\n", beacon_int);
1271 }
1272 
handle_irq_ucode_debug(struct b43legacy_wldev * dev)1273 static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
1274 {
1275 }
1276 
1277 /* Interrupt handler bottom-half */
b43legacy_interrupt_tasklet(struct tasklet_struct * t)1278 static void b43legacy_interrupt_tasklet(struct tasklet_struct *t)
1279 {
1280 	struct b43legacy_wldev *dev = from_tasklet(dev, t, isr_tasklet);
1281 	u32 reason;
1282 	u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
1283 	u32 merged_dma_reason = 0;
1284 	int i;
1285 	unsigned long flags;
1286 
1287 	spin_lock_irqsave(&dev->wl->irq_lock, flags);
1288 
1289 	B43legacy_WARN_ON(b43legacy_status(dev) <
1290 			  B43legacy_STAT_INITIALIZED);
1291 
1292 	reason = dev->irq_reason;
1293 	for (i = 0; i < ARRAY_SIZE(dma_reason); i++) {
1294 		dma_reason[i] = dev->dma_reason[i];
1295 		merged_dma_reason |= dma_reason[i];
1296 	}
1297 
1298 	if (unlikely(reason & B43legacy_IRQ_MAC_TXERR))
1299 		b43legacyerr(dev->wl, "MAC transmission error\n");
1300 
1301 	if (unlikely(reason & B43legacy_IRQ_PHY_TXERR)) {
1302 		b43legacyerr(dev->wl, "PHY transmission error\n");
1303 		rmb();
1304 		if (unlikely(atomic_dec_and_test(&dev->phy.txerr_cnt))) {
1305 			b43legacyerr(dev->wl, "Too many PHY TX errors, "
1306 					      "restarting the controller\n");
1307 			b43legacy_controller_restart(dev, "PHY TX errors");
1308 		}
1309 	}
1310 
1311 	if (unlikely(merged_dma_reason & (B43legacy_DMAIRQ_FATALMASK |
1312 					  B43legacy_DMAIRQ_NONFATALMASK))) {
1313 		if (merged_dma_reason & B43legacy_DMAIRQ_FATALMASK) {
1314 			b43legacyerr(dev->wl, "Fatal DMA error: "
1315 			       "0x%08X, 0x%08X, 0x%08X, "
1316 			       "0x%08X, 0x%08X, 0x%08X\n",
1317 			       dma_reason[0], dma_reason[1],
1318 			       dma_reason[2], dma_reason[3],
1319 			       dma_reason[4], dma_reason[5]);
1320 			b43legacy_controller_restart(dev, "DMA error");
1321 			spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1322 			return;
1323 		}
1324 		if (merged_dma_reason & B43legacy_DMAIRQ_NONFATALMASK)
1325 			b43legacyerr(dev->wl, "DMA error: "
1326 			       "0x%08X, 0x%08X, 0x%08X, "
1327 			       "0x%08X, 0x%08X, 0x%08X\n",
1328 			       dma_reason[0], dma_reason[1],
1329 			       dma_reason[2], dma_reason[3],
1330 			       dma_reason[4], dma_reason[5]);
1331 	}
1332 
1333 	if (unlikely(reason & B43legacy_IRQ_UCODE_DEBUG))
1334 		handle_irq_ucode_debug(dev);
1335 	if (reason & B43legacy_IRQ_TBTT_INDI)
1336 		handle_irq_tbtt_indication(dev);
1337 	if (reason & B43legacy_IRQ_ATIM_END)
1338 		handle_irq_atim_end(dev);
1339 	if (reason & B43legacy_IRQ_BEACON)
1340 		handle_irq_beacon(dev);
1341 	if (reason & B43legacy_IRQ_PMQ)
1342 		handle_irq_pmq(dev);
1343 	if (reason & B43legacy_IRQ_TXFIFO_FLUSH_OK) {
1344 		;/*TODO*/
1345 	}
1346 	if (reason & B43legacy_IRQ_NOISESAMPLE_OK)
1347 		handle_irq_noise(dev);
1348 
1349 	/* Check the DMA reason registers for received data. */
1350 	if (dma_reason[0] & B43legacy_DMAIRQ_RX_DONE) {
1351 		if (b43legacy_using_pio(dev))
1352 			b43legacy_pio_rx(dev->pio.queue0);
1353 		else
1354 			b43legacy_dma_rx(dev->dma.rx_ring0);
1355 	}
1356 	B43legacy_WARN_ON(dma_reason[1] & B43legacy_DMAIRQ_RX_DONE);
1357 	B43legacy_WARN_ON(dma_reason[2] & B43legacy_DMAIRQ_RX_DONE);
1358 	if (dma_reason[3] & B43legacy_DMAIRQ_RX_DONE) {
1359 		if (b43legacy_using_pio(dev))
1360 			b43legacy_pio_rx(dev->pio.queue3);
1361 		else
1362 			b43legacy_dma_rx(dev->dma.rx_ring3);
1363 	}
1364 	B43legacy_WARN_ON(dma_reason[4] & B43legacy_DMAIRQ_RX_DONE);
1365 	B43legacy_WARN_ON(dma_reason[5] & B43legacy_DMAIRQ_RX_DONE);
1366 
1367 	if (reason & B43legacy_IRQ_TX_OK)
1368 		handle_irq_transmit_status(dev);
1369 
1370 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
1371 	spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
1372 }
1373 
pio_irq_workaround(struct b43legacy_wldev * dev,u16 base,int queueidx)1374 static void pio_irq_workaround(struct b43legacy_wldev *dev,
1375 			       u16 base, int queueidx)
1376 {
1377 	u16 rxctl;
1378 
1379 	rxctl = b43legacy_read16(dev, base + B43legacy_PIO_RXCTL);
1380 	if (rxctl & B43legacy_PIO_RXCTL_DATAAVAILABLE)
1381 		dev->dma_reason[queueidx] |= B43legacy_DMAIRQ_RX_DONE;
1382 	else
1383 		dev->dma_reason[queueidx] &= ~B43legacy_DMAIRQ_RX_DONE;
1384 }
1385 
b43legacy_interrupt_ack(struct b43legacy_wldev * dev,u32 reason)1386 static void b43legacy_interrupt_ack(struct b43legacy_wldev *dev, u32 reason)
1387 {
1388 	if (b43legacy_using_pio(dev) &&
1389 	    (dev->dev->id.revision < 3) &&
1390 	    (!(reason & B43legacy_IRQ_PIO_WORKAROUND))) {
1391 		/* Apply a PIO specific workaround to the dma_reasons */
1392 		pio_irq_workaround(dev, B43legacy_MMIO_PIO1_BASE, 0);
1393 		pio_irq_workaround(dev, B43legacy_MMIO_PIO2_BASE, 1);
1394 		pio_irq_workaround(dev, B43legacy_MMIO_PIO3_BASE, 2);
1395 		pio_irq_workaround(dev, B43legacy_MMIO_PIO4_BASE, 3);
1396 	}
1397 
1398 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, reason);
1399 
1400 	b43legacy_write32(dev, B43legacy_MMIO_DMA0_REASON,
1401 			  dev->dma_reason[0]);
1402 	b43legacy_write32(dev, B43legacy_MMIO_DMA1_REASON,
1403 			  dev->dma_reason[1]);
1404 	b43legacy_write32(dev, B43legacy_MMIO_DMA2_REASON,
1405 			  dev->dma_reason[2]);
1406 	b43legacy_write32(dev, B43legacy_MMIO_DMA3_REASON,
1407 			  dev->dma_reason[3]);
1408 	b43legacy_write32(dev, B43legacy_MMIO_DMA4_REASON,
1409 			  dev->dma_reason[4]);
1410 	b43legacy_write32(dev, B43legacy_MMIO_DMA5_REASON,
1411 			  dev->dma_reason[5]);
1412 }
1413 
1414 /* Interrupt handler top-half */
b43legacy_interrupt_handler(int irq,void * dev_id)1415 static irqreturn_t b43legacy_interrupt_handler(int irq, void *dev_id)
1416 {
1417 	irqreturn_t ret = IRQ_NONE;
1418 	struct b43legacy_wldev *dev = dev_id;
1419 	u32 reason;
1420 
1421 	B43legacy_WARN_ON(!dev);
1422 
1423 	spin_lock(&dev->wl->irq_lock);
1424 
1425 	if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
1426 		/* This can only happen on shared IRQ lines. */
1427 		goto out;
1428 	reason = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1429 	if (reason == 0xffffffff) /* shared IRQ */
1430 		goto out;
1431 	ret = IRQ_HANDLED;
1432 	reason &= dev->irq_mask;
1433 	if (!reason)
1434 		goto out;
1435 
1436 	dev->dma_reason[0] = b43legacy_read32(dev,
1437 					      B43legacy_MMIO_DMA0_REASON)
1438 					      & 0x0001DC00;
1439 	dev->dma_reason[1] = b43legacy_read32(dev,
1440 					      B43legacy_MMIO_DMA1_REASON)
1441 					      & 0x0000DC00;
1442 	dev->dma_reason[2] = b43legacy_read32(dev,
1443 					      B43legacy_MMIO_DMA2_REASON)
1444 					      & 0x0000DC00;
1445 	dev->dma_reason[3] = b43legacy_read32(dev,
1446 					      B43legacy_MMIO_DMA3_REASON)
1447 					      & 0x0001DC00;
1448 	dev->dma_reason[4] = b43legacy_read32(dev,
1449 					      B43legacy_MMIO_DMA4_REASON)
1450 					      & 0x0000DC00;
1451 	dev->dma_reason[5] = b43legacy_read32(dev,
1452 					      B43legacy_MMIO_DMA5_REASON)
1453 					      & 0x0000DC00;
1454 
1455 	b43legacy_interrupt_ack(dev, reason);
1456 	/* Disable all IRQs. They are enabled again in the bottom half. */
1457 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
1458 	/* Save the reason code and call our bottom half. */
1459 	dev->irq_reason = reason;
1460 	tasklet_schedule(&dev->isr_tasklet);
1461 out:
1462 	spin_unlock(&dev->wl->irq_lock);
1463 
1464 	return ret;
1465 }
1466 
b43legacy_release_firmware(struct b43legacy_wldev * dev)1467 static void b43legacy_release_firmware(struct b43legacy_wldev *dev)
1468 {
1469 	release_firmware(dev->fw.ucode);
1470 	dev->fw.ucode = NULL;
1471 	release_firmware(dev->fw.pcm);
1472 	dev->fw.pcm = NULL;
1473 	release_firmware(dev->fw.initvals);
1474 	dev->fw.initvals = NULL;
1475 	release_firmware(dev->fw.initvals_band);
1476 	dev->fw.initvals_band = NULL;
1477 }
1478 
b43legacy_print_fw_helptext(struct b43legacy_wl * wl)1479 static void b43legacy_print_fw_helptext(struct b43legacy_wl *wl)
1480 {
1481 	b43legacyerr(wl, "You must go to https://wireless.wiki.kernel.org/en/"
1482 		     "users/Drivers/b43#devicefirmware "
1483 		     "and download the correct firmware (version 3).\n");
1484 }
1485 
b43legacy_fw_cb(const struct firmware * firmware,void * context)1486 static void b43legacy_fw_cb(const struct firmware *firmware, void *context)
1487 {
1488 	struct b43legacy_wldev *dev = context;
1489 
1490 	dev->fwp = firmware;
1491 	complete(&dev->fw_load_complete);
1492 }
1493 
do_request_fw(struct b43legacy_wldev * dev,const char * name,const struct firmware ** fw,bool async)1494 static int do_request_fw(struct b43legacy_wldev *dev,
1495 			 const char *name,
1496 			 const struct firmware **fw, bool async)
1497 {
1498 	char path[sizeof(modparam_fwpostfix) + 32];
1499 	struct b43legacy_fw_header *hdr;
1500 	u32 size;
1501 	int err;
1502 
1503 	if (!name)
1504 		return 0;
1505 
1506 	snprintf(path, ARRAY_SIZE(path),
1507 		 "b43legacy%s/%s.fw",
1508 		 modparam_fwpostfix, name);
1509 	b43legacyinfo(dev->wl, "Loading firmware %s\n", path);
1510 	if (async) {
1511 		init_completion(&dev->fw_load_complete);
1512 		err = request_firmware_nowait(THIS_MODULE, 1, path,
1513 					      dev->dev->dev, GFP_KERNEL,
1514 					      dev, b43legacy_fw_cb);
1515 		if (err) {
1516 			b43legacyerr(dev->wl, "Unable to load firmware\n");
1517 			return err;
1518 		}
1519 		/* stall here until fw ready */
1520 		wait_for_completion(&dev->fw_load_complete);
1521 		if (!dev->fwp)
1522 			err = -EINVAL;
1523 		*fw = dev->fwp;
1524 	} else {
1525 		err = request_firmware(fw, path, dev->dev->dev);
1526 	}
1527 	if (err) {
1528 		b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
1529 		       "or load failed.\n", path);
1530 		return err;
1531 	}
1532 	if ((*fw)->size < sizeof(struct b43legacy_fw_header))
1533 		goto err_format;
1534 	hdr = (struct b43legacy_fw_header *)((*fw)->data);
1535 	switch (hdr->type) {
1536 	case B43legacy_FW_TYPE_UCODE:
1537 	case B43legacy_FW_TYPE_PCM:
1538 		size = be32_to_cpu(hdr->size);
1539 		if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
1540 			goto err_format;
1541 		fallthrough;
1542 	case B43legacy_FW_TYPE_IV:
1543 		if (hdr->ver != 1)
1544 			goto err_format;
1545 		break;
1546 	default:
1547 		goto err_format;
1548 	}
1549 
1550 	return err;
1551 
1552 err_format:
1553 	b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
1554 	return -EPROTO;
1555 }
1556 
1557 static int b43legacy_one_core_attach(struct ssb_device *dev,
1558 				     struct b43legacy_wl *wl);
1559 static void b43legacy_one_core_detach(struct ssb_device *dev);
1560 
b43legacy_request_firmware(struct work_struct * work)1561 static void b43legacy_request_firmware(struct work_struct *work)
1562 {
1563 	struct b43legacy_wl *wl = container_of(work,
1564 				  struct b43legacy_wl, firmware_load);
1565 	struct b43legacy_wldev *dev = wl->current_dev;
1566 	struct b43legacy_firmware *fw = &dev->fw;
1567 	const u8 rev = dev->dev->id.revision;
1568 	const char *filename;
1569 	int err;
1570 
1571 	if (!fw->ucode) {
1572 		if (rev == 2)
1573 			filename = "ucode2";
1574 		else if (rev == 4)
1575 			filename = "ucode4";
1576 		else
1577 			filename = "ucode5";
1578 		err = do_request_fw(dev, filename, &fw->ucode, true);
1579 		if (err)
1580 			goto err_load;
1581 	}
1582 	if (!fw->pcm) {
1583 		if (rev < 5)
1584 			filename = "pcm4";
1585 		else
1586 			filename = "pcm5";
1587 		err = do_request_fw(dev, filename, &fw->pcm, false);
1588 		if (err)
1589 			goto err_load;
1590 	}
1591 	if (!fw->initvals) {
1592 		switch (dev->phy.type) {
1593 		case B43legacy_PHYTYPE_B:
1594 		case B43legacy_PHYTYPE_G:
1595 			if ((rev >= 5) && (rev <= 10))
1596 				filename = "b0g0initvals5";
1597 			else if (rev == 2 || rev == 4)
1598 				filename = "b0g0initvals2";
1599 			else
1600 				goto err_no_initvals;
1601 			break;
1602 		default:
1603 			goto err_no_initvals;
1604 		}
1605 		err = do_request_fw(dev, filename, &fw->initvals, false);
1606 		if (err)
1607 			goto err_load;
1608 	}
1609 	if (!fw->initvals_band) {
1610 		switch (dev->phy.type) {
1611 		case B43legacy_PHYTYPE_B:
1612 		case B43legacy_PHYTYPE_G:
1613 			if ((rev >= 5) && (rev <= 10))
1614 				filename = "b0g0bsinitvals5";
1615 			else if (rev >= 11)
1616 				filename = NULL;
1617 			else if (rev == 2 || rev == 4)
1618 				filename = NULL;
1619 			else
1620 				goto err_no_initvals;
1621 			break;
1622 		default:
1623 			goto err_no_initvals;
1624 		}
1625 		err = do_request_fw(dev, filename, &fw->initvals_band, false);
1626 		if (err)
1627 			goto err_load;
1628 	}
1629 	err = ieee80211_register_hw(wl->hw);
1630 	if (err)
1631 		goto err_one_core_detach;
1632 	return;
1633 
1634 err_one_core_detach:
1635 	b43legacy_one_core_detach(dev->dev);
1636 	goto error;
1637 
1638 err_load:
1639 	b43legacy_print_fw_helptext(dev->wl);
1640 	goto error;
1641 
1642 err_no_initvals:
1643 	err = -ENODEV;
1644 	b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
1645 	       "core rev %u\n", dev->phy.type, rev);
1646 	goto error;
1647 
1648 error:
1649 	b43legacy_release_firmware(dev);
1650 	return;
1651 }
1652 
b43legacy_upload_microcode(struct b43legacy_wldev * dev)1653 static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
1654 {
1655 	struct wiphy *wiphy = dev->wl->hw->wiphy;
1656 	const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1657 	const __be32 *data;
1658 	unsigned int i;
1659 	unsigned int len;
1660 	u16 fwrev;
1661 	u16 fwpatch;
1662 	u16 fwdate;
1663 	u16 fwtime;
1664 	u32 tmp, macctl;
1665 	int err = 0;
1666 
1667 	/* Jump the microcode PSM to offset 0 */
1668 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1669 	B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
1670 	macctl |= B43legacy_MACCTL_PSM_JMP0;
1671 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1672 	/* Zero out all microcode PSM registers and shared memory. */
1673 	for (i = 0; i < 64; i++)
1674 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
1675 	for (i = 0; i < 4096; i += 2)
1676 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);
1677 
1678 	/* Upload Microcode. */
1679 	data = (__be32 *) (dev->fw.ucode->data + hdr_len);
1680 	len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
1681 	b43legacy_shm_control_word(dev,
1682 				   B43legacy_SHM_UCODE |
1683 				   B43legacy_SHM_AUTOINC_W,
1684 				   0x0000);
1685 	for (i = 0; i < len; i++) {
1686 		b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1687 				    be32_to_cpu(data[i]));
1688 		udelay(10);
1689 	}
1690 
1691 	if (dev->fw.pcm) {
1692 		/* Upload PCM data. */
1693 		data = (__be32 *) (dev->fw.pcm->data + hdr_len);
1694 		len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
1695 		b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
1696 		b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
1697 		/* No need for autoinc bit in SHM_HW */
1698 		b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
1699 		for (i = 0; i < len; i++) {
1700 			b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
1701 					  be32_to_cpu(data[i]));
1702 			udelay(10);
1703 		}
1704 	}
1705 
1706 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1707 			  B43legacy_IRQ_ALL);
1708 
1709 	/* Start the microcode PSM */
1710 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1711 	macctl &= ~B43legacy_MACCTL_PSM_JMP0;
1712 	macctl |= B43legacy_MACCTL_PSM_RUN;
1713 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1714 
1715 	/* Wait for the microcode to load and respond */
1716 	i = 0;
1717 	while (1) {
1718 		tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1719 		if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
1720 			break;
1721 		i++;
1722 		if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
1723 			b43legacyerr(dev->wl, "Microcode not responding\n");
1724 			b43legacy_print_fw_helptext(dev->wl);
1725 			err = -ENODEV;
1726 			goto error;
1727 		}
1728 		msleep_interruptible(50);
1729 		if (signal_pending(current)) {
1730 			err = -EINTR;
1731 			goto error;
1732 		}
1733 	}
1734 	/* dummy read follows */
1735 	b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1736 
1737 	/* Get and check the revisions. */
1738 	fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1739 				     B43legacy_SHM_SH_UCODEREV);
1740 	fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1741 				       B43legacy_SHM_SH_UCODEPATCH);
1742 	fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1743 				      B43legacy_SHM_SH_UCODEDATE);
1744 	fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
1745 				      B43legacy_SHM_SH_UCODETIME);
1746 
1747 	if (fwrev > 0x128) {
1748 		b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
1749 			     " Only firmware from binary drivers version 3.x"
1750 			     " is supported. You must change your firmware"
1751 			     " files.\n");
1752 		b43legacy_print_fw_helptext(dev->wl);
1753 		err = -EOPNOTSUPP;
1754 		goto error;
1755 	}
1756 	b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
1757 		      "(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
1758 		      (fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
1759 		      (fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
1760 		      fwtime & 0x1F);
1761 
1762 	dev->fw.rev = fwrev;
1763 	dev->fw.patch = fwpatch;
1764 
1765 	snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "%u.%u",
1766 			dev->fw.rev, dev->fw.patch);
1767 	wiphy->hw_version = dev->dev->id.coreid;
1768 
1769 	return 0;
1770 
1771 error:
1772 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1773 	macctl &= ~B43legacy_MACCTL_PSM_RUN;
1774 	macctl |= B43legacy_MACCTL_PSM_JMP0;
1775 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
1776 
1777 	return err;
1778 }
1779 
b43legacy_write_initvals(struct b43legacy_wldev * dev,const struct b43legacy_iv * ivals,size_t count,size_t array_size)1780 static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
1781 				    const struct b43legacy_iv *ivals,
1782 				    size_t count,
1783 				    size_t array_size)
1784 {
1785 	const struct b43legacy_iv *iv;
1786 	u16 offset;
1787 	size_t i;
1788 	bool bit32;
1789 
1790 	BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
1791 	iv = ivals;
1792 	for (i = 0; i < count; i++) {
1793 		if (array_size < sizeof(iv->offset_size))
1794 			goto err_format;
1795 		array_size -= sizeof(iv->offset_size);
1796 		offset = be16_to_cpu(iv->offset_size);
1797 		bit32 = !!(offset & B43legacy_IV_32BIT);
1798 		offset &= B43legacy_IV_OFFSET_MASK;
1799 		if (offset >= 0x1000)
1800 			goto err_format;
1801 		if (bit32) {
1802 			u32 value;
1803 
1804 			if (array_size < sizeof(iv->data.d32))
1805 				goto err_format;
1806 			array_size -= sizeof(iv->data.d32);
1807 
1808 			value = get_unaligned_be32(&iv->data.d32);
1809 			b43legacy_write32(dev, offset, value);
1810 
1811 			iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1812 							sizeof(__be16) +
1813 							sizeof(__be32));
1814 		} else {
1815 			u16 value;
1816 
1817 			if (array_size < sizeof(iv->data.d16))
1818 				goto err_format;
1819 			array_size -= sizeof(iv->data.d16);
1820 
1821 			value = be16_to_cpu(iv->data.d16);
1822 			b43legacy_write16(dev, offset, value);
1823 
1824 			iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
1825 							sizeof(__be16) +
1826 							sizeof(__be16));
1827 		}
1828 	}
1829 	if (array_size)
1830 		goto err_format;
1831 
1832 	return 0;
1833 
1834 err_format:
1835 	b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
1836 	b43legacy_print_fw_helptext(dev->wl);
1837 
1838 	return -EPROTO;
1839 }
1840 
b43legacy_upload_initvals(struct b43legacy_wldev * dev)1841 static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
1842 {
1843 	const size_t hdr_len = sizeof(struct b43legacy_fw_header);
1844 	const struct b43legacy_fw_header *hdr;
1845 	struct b43legacy_firmware *fw = &dev->fw;
1846 	const struct b43legacy_iv *ivals;
1847 	size_t count;
1848 	int err;
1849 
1850 	hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
1851 	ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
1852 	count = be32_to_cpu(hdr->size);
1853 	err = b43legacy_write_initvals(dev, ivals, count,
1854 				 fw->initvals->size - hdr_len);
1855 	if (err)
1856 		goto out;
1857 	if (fw->initvals_band) {
1858 		hdr = (const struct b43legacy_fw_header *)
1859 		      (fw->initvals_band->data);
1860 		ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
1861 			+ hdr_len);
1862 		count = be32_to_cpu(hdr->size);
1863 		err = b43legacy_write_initvals(dev, ivals, count,
1864 					 fw->initvals_band->size - hdr_len);
1865 		if (err)
1866 			goto out;
1867 	}
1868 out:
1869 
1870 	return err;
1871 }
1872 
1873 /* Initialize the GPIOs
1874  * https://bcm-specs.sipsolutions.net/GPIO
1875  */
b43legacy_gpio_init(struct b43legacy_wldev * dev)1876 static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
1877 {
1878 	struct ssb_bus *bus = dev->dev->bus;
1879 	struct ssb_device *gpiodev, *pcidev = NULL;
1880 	u32 mask;
1881 	u32 set;
1882 
1883 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1884 			  b43legacy_read32(dev,
1885 			  B43legacy_MMIO_MACCTL)
1886 			  & 0xFFFF3FFF);
1887 
1888 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1889 			  b43legacy_read16(dev,
1890 			  B43legacy_MMIO_GPIO_MASK)
1891 			  | 0x000F);
1892 
1893 	mask = 0x0000001F;
1894 	set = 0x0000000F;
1895 	if (dev->dev->bus->chip_id == 0x4301) {
1896 		mask |= 0x0060;
1897 		set |= 0x0060;
1898 	}
1899 	if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
1900 		b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
1901 				  b43legacy_read16(dev,
1902 				  B43legacy_MMIO_GPIO_MASK)
1903 				  | 0x0200);
1904 		mask |= 0x0200;
1905 		set |= 0x0200;
1906 	}
1907 	if (dev->dev->id.revision >= 2)
1908 		mask  |= 0x0010; /* FIXME: This is redundant. */
1909 
1910 #ifdef CONFIG_SSB_DRIVER_PCICORE
1911 	pcidev = bus->pcicore.dev;
1912 #endif
1913 	gpiodev = bus->chipco.dev ? : pcidev;
1914 	if (!gpiodev)
1915 		return 0;
1916 	ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
1917 		    (ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
1918 		     & ~mask) | set);
1919 
1920 	return 0;
1921 }
1922 
1923 /* Turn off all GPIO stuff. Call this on module unload, for example. */
b43legacy_gpio_cleanup(struct b43legacy_wldev * dev)1924 static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
1925 {
1926 	struct ssb_bus *bus = dev->dev->bus;
1927 	struct ssb_device *gpiodev, *pcidev = NULL;
1928 
1929 #ifdef CONFIG_SSB_DRIVER_PCICORE
1930 	pcidev = bus->pcicore.dev;
1931 #endif
1932 	gpiodev = bus->chipco.dev ? : pcidev;
1933 	if (!gpiodev)
1934 		return;
1935 	ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
1936 }
1937 
1938 /* http://bcm-specs.sipsolutions.net/EnableMac */
b43legacy_mac_enable(struct b43legacy_wldev * dev)1939 void b43legacy_mac_enable(struct b43legacy_wldev *dev)
1940 {
1941 	dev->mac_suspended--;
1942 	B43legacy_WARN_ON(dev->mac_suspended < 0);
1943 	B43legacy_WARN_ON(irqs_disabled());
1944 	if (dev->mac_suspended == 0) {
1945 		b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1946 				  b43legacy_read32(dev,
1947 				  B43legacy_MMIO_MACCTL)
1948 				  | B43legacy_MACCTL_ENABLED);
1949 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
1950 				  B43legacy_IRQ_MAC_SUSPENDED);
1951 		/* the next two are dummy reads */
1952 		b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
1953 		b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1954 		b43legacy_power_saving_ctl_bits(dev, -1, -1);
1955 
1956 		/* Re-enable IRQs. */
1957 		spin_lock_irq(&dev->wl->irq_lock);
1958 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
1959 				  dev->irq_mask);
1960 		spin_unlock_irq(&dev->wl->irq_lock);
1961 	}
1962 }
1963 
1964 /* https://bcm-specs.sipsolutions.net/SuspendMAC */
b43legacy_mac_suspend(struct b43legacy_wldev * dev)1965 void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
1966 {
1967 	int i;
1968 	u32 tmp;
1969 
1970 	might_sleep();
1971 	B43legacy_WARN_ON(irqs_disabled());
1972 	B43legacy_WARN_ON(dev->mac_suspended < 0);
1973 
1974 	if (dev->mac_suspended == 0) {
1975 		/* Mask IRQs before suspending MAC. Otherwise
1976 		 * the MAC stays busy and won't suspend. */
1977 		spin_lock_irq(&dev->wl->irq_lock);
1978 		b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
1979 		spin_unlock_irq(&dev->wl->irq_lock);
1980 		b43legacy_synchronize_irq(dev);
1981 
1982 		b43legacy_power_saving_ctl_bits(dev, -1, 1);
1983 		b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
1984 				  b43legacy_read32(dev,
1985 				  B43legacy_MMIO_MACCTL)
1986 				  & ~B43legacy_MACCTL_ENABLED);
1987 		b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
1988 		for (i = 40; i; i--) {
1989 			tmp = b43legacy_read32(dev,
1990 					       B43legacy_MMIO_GEN_IRQ_REASON);
1991 			if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
1992 				goto out;
1993 			msleep(1);
1994 		}
1995 		b43legacyerr(dev->wl, "MAC suspend failed\n");
1996 	}
1997 out:
1998 	dev->mac_suspended++;
1999 }
2000 
b43legacy_adjust_opmode(struct b43legacy_wldev * dev)2001 static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
2002 {
2003 	struct b43legacy_wl *wl = dev->wl;
2004 	u32 ctl;
2005 	u16 cfp_pretbtt;
2006 
2007 	ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2008 	/* Reset status to STA infrastructure mode. */
2009 	ctl &= ~B43legacy_MACCTL_AP;
2010 	ctl &= ~B43legacy_MACCTL_KEEP_CTL;
2011 	ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
2012 	ctl &= ~B43legacy_MACCTL_KEEP_BAD;
2013 	ctl &= ~B43legacy_MACCTL_PROMISC;
2014 	ctl &= ~B43legacy_MACCTL_BEACPROMISC;
2015 	ctl |= B43legacy_MACCTL_INFRA;
2016 
2017 	if (b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
2018 		ctl |= B43legacy_MACCTL_AP;
2019 	else if (b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC))
2020 		ctl &= ~B43legacy_MACCTL_INFRA;
2021 
2022 	if (wl->filter_flags & FIF_CONTROL)
2023 		ctl |= B43legacy_MACCTL_KEEP_CTL;
2024 	if (wl->filter_flags & FIF_FCSFAIL)
2025 		ctl |= B43legacy_MACCTL_KEEP_BAD;
2026 	if (wl->filter_flags & FIF_PLCPFAIL)
2027 		ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
2028 	if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
2029 		ctl |= B43legacy_MACCTL_BEACPROMISC;
2030 
2031 	/* Workaround: On old hardware the HW-MAC-address-filter
2032 	 * doesn't work properly, so always run promisc in filter
2033 	 * it in software. */
2034 	if (dev->dev->id.revision <= 4)
2035 		ctl |= B43legacy_MACCTL_PROMISC;
2036 
2037 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);
2038 
2039 	cfp_pretbtt = 2;
2040 	if ((ctl & B43legacy_MACCTL_INFRA) &&
2041 	    !(ctl & B43legacy_MACCTL_AP)) {
2042 		if (dev->dev->bus->chip_id == 0x4306 &&
2043 		    dev->dev->bus->chip_rev == 3)
2044 			cfp_pretbtt = 100;
2045 		else
2046 			cfp_pretbtt = 50;
2047 	}
2048 	b43legacy_write16(dev, 0x612, cfp_pretbtt);
2049 }
2050 
b43legacy_rate_memory_write(struct b43legacy_wldev * dev,u16 rate,int is_ofdm)2051 static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
2052 					u16 rate,
2053 					int is_ofdm)
2054 {
2055 	u16 offset;
2056 
2057 	if (is_ofdm) {
2058 		offset = 0x480;
2059 		offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
2060 	} else {
2061 		offset = 0x4C0;
2062 		offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
2063 	}
2064 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
2065 			      b43legacy_shm_read16(dev,
2066 			      B43legacy_SHM_SHARED, offset));
2067 }
2068 
b43legacy_rate_memory_init(struct b43legacy_wldev * dev)2069 static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
2070 {
2071 	switch (dev->phy.type) {
2072 	case B43legacy_PHYTYPE_G:
2073 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
2074 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
2075 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
2076 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
2077 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
2078 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
2079 		b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
2080 		fallthrough;
2081 	case B43legacy_PHYTYPE_B:
2082 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
2083 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
2084 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
2085 		b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
2086 		break;
2087 	default:
2088 		B43legacy_BUG_ON(1);
2089 	}
2090 }
2091 
2092 /* Set the TX-Antenna for management frames sent by firmware. */
b43legacy_mgmtframe_txantenna(struct b43legacy_wldev * dev,int antenna)2093 static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
2094 					  int antenna)
2095 {
2096 	u16 ant = 0;
2097 	u16 tmp;
2098 
2099 	switch (antenna) {
2100 	case B43legacy_ANTENNA0:
2101 		ant |= B43legacy_TX4_PHY_ANT0;
2102 		break;
2103 	case B43legacy_ANTENNA1:
2104 		ant |= B43legacy_TX4_PHY_ANT1;
2105 		break;
2106 	case B43legacy_ANTENNA_AUTO:
2107 		ant |= B43legacy_TX4_PHY_ANTLAST;
2108 		break;
2109 	default:
2110 		B43legacy_BUG_ON(1);
2111 	}
2112 
2113 	/* FIXME We also need to set the other flags of the PHY control
2114 	 * field somewhere. */
2115 
2116 	/* For Beacons */
2117 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2118 				   B43legacy_SHM_SH_BEACPHYCTL);
2119 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2120 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2121 			      B43legacy_SHM_SH_BEACPHYCTL, tmp);
2122 	/* For ACK/CTS */
2123 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2124 				   B43legacy_SHM_SH_ACKCTSPHYCTL);
2125 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2126 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2127 			      B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
2128 	/* For Probe Resposes */
2129 	tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2130 				   B43legacy_SHM_SH_PRPHYCTL);
2131 	tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
2132 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2133 			      B43legacy_SHM_SH_PRPHYCTL, tmp);
2134 }
2135 
2136 /* This is the opposite of b43legacy_chip_init() */
b43legacy_chip_exit(struct b43legacy_wldev * dev)2137 static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
2138 {
2139 	b43legacy_radio_turn_off(dev, 1);
2140 	b43legacy_gpio_cleanup(dev);
2141 	/* firmware is released later */
2142 }
2143 
2144 /* Initialize the chip
2145  * https://bcm-specs.sipsolutions.net/ChipInit
2146  */
b43legacy_chip_init(struct b43legacy_wldev * dev)2147 static int b43legacy_chip_init(struct b43legacy_wldev *dev)
2148 {
2149 	struct b43legacy_phy *phy = &dev->phy;
2150 	int err;
2151 	int tmp;
2152 	u32 value32, macctl;
2153 	u16 value16;
2154 
2155 	/* Initialize the MAC control */
2156 	macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
2157 	if (dev->phy.gmode)
2158 		macctl |= B43legacy_MACCTL_GMODE;
2159 	macctl |= B43legacy_MACCTL_INFRA;
2160 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
2161 
2162 	err = b43legacy_upload_microcode(dev);
2163 	if (err)
2164 		goto out; /* firmware is released later */
2165 
2166 	err = b43legacy_gpio_init(dev);
2167 	if (err)
2168 		goto out; /* firmware is released later */
2169 
2170 	err = b43legacy_upload_initvals(dev);
2171 	if (err)
2172 		goto err_gpio_clean;
2173 	b43legacy_radio_turn_on(dev);
2174 
2175 	b43legacy_write16(dev, 0x03E6, 0x0000);
2176 	err = b43legacy_phy_init(dev);
2177 	if (err)
2178 		goto err_radio_off;
2179 
2180 	/* Select initial Interference Mitigation. */
2181 	tmp = phy->interfmode;
2182 	phy->interfmode = B43legacy_INTERFMODE_NONE;
2183 	b43legacy_radio_set_interference_mitigation(dev, tmp);
2184 
2185 	b43legacy_phy_set_antenna_diversity(dev);
2186 	b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);
2187 
2188 	if (phy->type == B43legacy_PHYTYPE_B) {
2189 		value16 = b43legacy_read16(dev, 0x005E);
2190 		value16 |= 0x0004;
2191 		b43legacy_write16(dev, 0x005E, value16);
2192 	}
2193 	b43legacy_write32(dev, 0x0100, 0x01000000);
2194 	if (dev->dev->id.revision < 5)
2195 		b43legacy_write32(dev, 0x010C, 0x01000000);
2196 
2197 	value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2198 	value32 &= ~B43legacy_MACCTL_INFRA;
2199 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2200 	value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2201 	value32 |= B43legacy_MACCTL_INFRA;
2202 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
2203 
2204 	if (b43legacy_using_pio(dev)) {
2205 		b43legacy_write32(dev, 0x0210, 0x00000100);
2206 		b43legacy_write32(dev, 0x0230, 0x00000100);
2207 		b43legacy_write32(dev, 0x0250, 0x00000100);
2208 		b43legacy_write32(dev, 0x0270, 0x00000100);
2209 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
2210 				      0x0000);
2211 	}
2212 
2213 	/* Probe Response Timeout value */
2214 	/* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
2215 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);
2216 
2217 	/* Initially set the wireless operation mode. */
2218 	b43legacy_adjust_opmode(dev);
2219 
2220 	if (dev->dev->id.revision < 3) {
2221 		b43legacy_write16(dev, 0x060E, 0x0000);
2222 		b43legacy_write16(dev, 0x0610, 0x8000);
2223 		b43legacy_write16(dev, 0x0604, 0x0000);
2224 		b43legacy_write16(dev, 0x0606, 0x0200);
2225 	} else {
2226 		b43legacy_write32(dev, 0x0188, 0x80000000);
2227 		b43legacy_write32(dev, 0x018C, 0x02000000);
2228 	}
2229 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
2230 	b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
2231 	b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
2232 	b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
2233 	b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
2234 	b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
2235 	b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);
2236 
2237 	value32 = ssb_read32(dev->dev, SSB_TMSLOW);
2238 	value32 |= B43legacy_TMSLOW_MACPHYCLKEN;
2239 	ssb_write32(dev->dev, SSB_TMSLOW, value32);
2240 
2241 	b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
2242 			  dev->dev->bus->chipco.fast_pwrup_delay);
2243 
2244 	/* PHY TX errors counter. */
2245 	atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2246 
2247 	B43legacy_WARN_ON(err != 0);
2248 	b43legacydbg(dev->wl, "Chip initialized\n");
2249 out:
2250 	return err;
2251 
2252 err_radio_off:
2253 	b43legacy_radio_turn_off(dev, 1);
2254 err_gpio_clean:
2255 	b43legacy_gpio_cleanup(dev);
2256 	goto out;
2257 }
2258 
b43legacy_periodic_every120sec(struct b43legacy_wldev * dev)2259 static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
2260 {
2261 	struct b43legacy_phy *phy = &dev->phy;
2262 
2263 	if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
2264 		return;
2265 
2266 	b43legacy_mac_suspend(dev);
2267 	b43legacy_phy_lo_g_measure(dev);
2268 	b43legacy_mac_enable(dev);
2269 }
2270 
b43legacy_periodic_every60sec(struct b43legacy_wldev * dev)2271 static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
2272 {
2273 	b43legacy_phy_lo_mark_all_unused(dev);
2274 	if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
2275 		b43legacy_mac_suspend(dev);
2276 		b43legacy_calc_nrssi_slope(dev);
2277 		b43legacy_mac_enable(dev);
2278 	}
2279 }
2280 
b43legacy_periodic_every30sec(struct b43legacy_wldev * dev)2281 static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
2282 {
2283 	/* Update device statistics. */
2284 	b43legacy_calculate_link_quality(dev);
2285 }
2286 
b43legacy_periodic_every15sec(struct b43legacy_wldev * dev)2287 static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
2288 {
2289 	b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */
2290 
2291 	atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
2292 	wmb();
2293 }
2294 
do_periodic_work(struct b43legacy_wldev * dev)2295 static void do_periodic_work(struct b43legacy_wldev *dev)
2296 {
2297 	unsigned int state;
2298 
2299 	state = dev->periodic_state;
2300 	if (state % 8 == 0)
2301 		b43legacy_periodic_every120sec(dev);
2302 	if (state % 4 == 0)
2303 		b43legacy_periodic_every60sec(dev);
2304 	if (state % 2 == 0)
2305 		b43legacy_periodic_every30sec(dev);
2306 	b43legacy_periodic_every15sec(dev);
2307 }
2308 
2309 /* Periodic work locking policy:
2310  * 	The whole periodic work handler is protected by
2311  * 	wl->mutex. If another lock is needed somewhere in the
2312  * 	pwork callchain, it's acquired in-place, where it's needed.
2313  */
b43legacy_periodic_work_handler(struct work_struct * work)2314 static void b43legacy_periodic_work_handler(struct work_struct *work)
2315 {
2316 	struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
2317 					     periodic_work.work);
2318 	struct b43legacy_wl *wl = dev->wl;
2319 	unsigned long delay;
2320 
2321 	mutex_lock(&wl->mutex);
2322 
2323 	if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
2324 		goto out;
2325 	if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
2326 		goto out_requeue;
2327 
2328 	do_periodic_work(dev);
2329 
2330 	dev->periodic_state++;
2331 out_requeue:
2332 	if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
2333 		delay = msecs_to_jiffies(50);
2334 	else
2335 		delay = round_jiffies_relative(HZ * 15);
2336 	ieee80211_queue_delayed_work(wl->hw, &dev->periodic_work, delay);
2337 out:
2338 	mutex_unlock(&wl->mutex);
2339 }
2340 
b43legacy_periodic_tasks_setup(struct b43legacy_wldev * dev)2341 static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
2342 {
2343 	struct delayed_work *work = &dev->periodic_work;
2344 
2345 	dev->periodic_state = 0;
2346 	INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
2347 	ieee80211_queue_delayed_work(dev->wl->hw, work, 0);
2348 }
2349 
2350 /* Validate access to the chip (SHM) */
b43legacy_validate_chipaccess(struct b43legacy_wldev * dev)2351 static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
2352 {
2353 	u32 value;
2354 	u32 shm_backup;
2355 
2356 	shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
2357 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
2358 	if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2359 				 0xAA5555AA)
2360 		goto error;
2361 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
2362 	if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
2363 				 0x55AAAA55)
2364 		goto error;
2365 	b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);
2366 
2367 	value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
2368 	if ((value | B43legacy_MACCTL_GMODE) !=
2369 	    (B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
2370 		goto error;
2371 
2372 	value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
2373 	if (value)
2374 		goto error;
2375 
2376 	return 0;
2377 error:
2378 	b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
2379 	return -ENODEV;
2380 }
2381 
b43legacy_security_init(struct b43legacy_wldev * dev)2382 static void b43legacy_security_init(struct b43legacy_wldev *dev)
2383 {
2384 	dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
2385 	B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
2386 	dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2387 					0x0056);
2388 	/* KTP is a word address, but we address SHM bytewise.
2389 	 * So multiply by two.
2390 	 */
2391 	dev->ktp *= 2;
2392 	if (dev->dev->id.revision >= 5)
2393 		/* Number of RCMTA address slots */
2394 		b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
2395 				  dev->max_nr_keys - 8);
2396 }
2397 
2398 #ifdef CONFIG_B43LEGACY_HWRNG
b43legacy_rng_read(struct hwrng * rng,u32 * data)2399 static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
2400 {
2401 	struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
2402 	unsigned long flags;
2403 
2404 	/* Don't take wl->mutex here, as it could deadlock with
2405 	 * hwrng internal locking. It's not needed to take
2406 	 * wl->mutex here, anyway. */
2407 
2408 	spin_lock_irqsave(&wl->irq_lock, flags);
2409 	*data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
2410 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2411 
2412 	return (sizeof(u16));
2413 }
2414 #endif
2415 
b43legacy_rng_exit(struct b43legacy_wl * wl)2416 static void b43legacy_rng_exit(struct b43legacy_wl *wl)
2417 {
2418 #ifdef CONFIG_B43LEGACY_HWRNG
2419 	if (wl->rng_initialized)
2420 		hwrng_unregister(&wl->rng);
2421 #endif
2422 }
2423 
b43legacy_rng_init(struct b43legacy_wl * wl)2424 static int b43legacy_rng_init(struct b43legacy_wl *wl)
2425 {
2426 	int err = 0;
2427 
2428 #ifdef CONFIG_B43LEGACY_HWRNG
2429 	snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
2430 		 "%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
2431 	wl->rng.name = wl->rng_name;
2432 	wl->rng.data_read = b43legacy_rng_read;
2433 	wl->rng.priv = (unsigned long)wl;
2434 	wl->rng_initialized = 1;
2435 	err = hwrng_register(&wl->rng);
2436 	if (err) {
2437 		wl->rng_initialized = 0;
2438 		b43legacyerr(wl, "Failed to register the random "
2439 		       "number generator (%d)\n", err);
2440 	}
2441 
2442 #endif
2443 	return err;
2444 }
2445 
b43legacy_tx_work(struct work_struct * work)2446 static void b43legacy_tx_work(struct work_struct *work)
2447 {
2448 	struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
2449 				  tx_work);
2450 	struct b43legacy_wldev *dev;
2451 	struct sk_buff *skb;
2452 	int queue_num;
2453 	int err = 0;
2454 
2455 	mutex_lock(&wl->mutex);
2456 	dev = wl->current_dev;
2457 	if (unlikely(!dev || b43legacy_status(dev) < B43legacy_STAT_STARTED)) {
2458 		mutex_unlock(&wl->mutex);
2459 		return;
2460 	}
2461 
2462 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2463 		while (skb_queue_len(&wl->tx_queue[queue_num])) {
2464 			skb = skb_dequeue(&wl->tx_queue[queue_num]);
2465 			if (b43legacy_using_pio(dev))
2466 				err = b43legacy_pio_tx(dev, skb);
2467 			else
2468 				err = b43legacy_dma_tx(dev, skb);
2469 			if (err == -ENOSPC) {
2470 				wl->tx_queue_stopped[queue_num] = 1;
2471 				ieee80211_stop_queue(wl->hw, queue_num);
2472 				skb_queue_head(&wl->tx_queue[queue_num], skb);
2473 				break;
2474 			}
2475 			if (unlikely(err))
2476 				dev_kfree_skb(skb); /* Drop it */
2477 			err = 0;
2478 		}
2479 
2480 		if (!err)
2481 			wl->tx_queue_stopped[queue_num] = 0;
2482 	}
2483 
2484 	mutex_unlock(&wl->mutex);
2485 }
2486 
b43legacy_op_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)2487 static void b43legacy_op_tx(struct ieee80211_hw *hw,
2488 			    struct ieee80211_tx_control *control,
2489 			    struct sk_buff *skb)
2490 {
2491 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2492 
2493 	if (unlikely(skb->len < 2 + 2 + 6)) {
2494 		/* Too short, this can't be a valid frame. */
2495 		dev_kfree_skb_any(skb);
2496 		return;
2497 	}
2498 	B43legacy_WARN_ON(skb_shinfo(skb)->nr_frags);
2499 
2500 	skb_queue_tail(&wl->tx_queue[skb->queue_mapping], skb);
2501 	if (!wl->tx_queue_stopped[skb->queue_mapping])
2502 		ieee80211_queue_work(wl->hw, &wl->tx_work);
2503 	else
2504 		ieee80211_stop_queue(wl->hw, skb->queue_mapping);
2505 }
2506 
b43legacy_op_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)2507 static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
2508 				struct ieee80211_vif *vif,
2509 				unsigned int link_id, u16 queue,
2510 				const struct ieee80211_tx_queue_params *params)
2511 {
2512 	return 0;
2513 }
2514 
b43legacy_op_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)2515 static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
2516 				  struct ieee80211_low_level_stats *stats)
2517 {
2518 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2519 	unsigned long flags;
2520 
2521 	spin_lock_irqsave(&wl->irq_lock, flags);
2522 	memcpy(stats, &wl->ieee_stats, sizeof(*stats));
2523 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2524 
2525 	return 0;
2526 }
2527 
phymode_to_string(unsigned int phymode)2528 static const char *phymode_to_string(unsigned int phymode)
2529 {
2530 	switch (phymode) {
2531 	case B43legacy_PHYMODE_B:
2532 		return "B";
2533 	case B43legacy_PHYMODE_G:
2534 		return "G";
2535 	default:
2536 		B43legacy_BUG_ON(1);
2537 	}
2538 	return "";
2539 }
2540 
find_wldev_for_phymode(struct b43legacy_wl * wl,unsigned int phymode,struct b43legacy_wldev ** dev,bool * gmode)2541 static int find_wldev_for_phymode(struct b43legacy_wl *wl,
2542 				  unsigned int phymode,
2543 				  struct b43legacy_wldev **dev,
2544 				  bool *gmode)
2545 {
2546 	struct b43legacy_wldev *d;
2547 
2548 	list_for_each_entry(d, &wl->devlist, list) {
2549 		if (d->phy.possible_phymodes & phymode) {
2550 			/* Ok, this device supports the PHY-mode.
2551 			 * Set the gmode bit. */
2552 			*gmode = true;
2553 			*dev = d;
2554 
2555 			return 0;
2556 		}
2557 	}
2558 
2559 	return -ESRCH;
2560 }
2561 
b43legacy_put_phy_into_reset(struct b43legacy_wldev * dev)2562 static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
2563 {
2564 	struct ssb_device *sdev = dev->dev;
2565 	u32 tmslow;
2566 
2567 	tmslow = ssb_read32(sdev, SSB_TMSLOW);
2568 	tmslow &= ~B43legacy_TMSLOW_GMODE;
2569 	tmslow |= B43legacy_TMSLOW_PHYRESET;
2570 	tmslow |= SSB_TMSLOW_FGC;
2571 	ssb_write32(sdev, SSB_TMSLOW, tmslow);
2572 	msleep(1);
2573 
2574 	tmslow = ssb_read32(sdev, SSB_TMSLOW);
2575 	tmslow &= ~SSB_TMSLOW_FGC;
2576 	tmslow |= B43legacy_TMSLOW_PHYRESET;
2577 	ssb_write32(sdev, SSB_TMSLOW, tmslow);
2578 	msleep(1);
2579 }
2580 
2581 /* Expects wl->mutex locked */
b43legacy_switch_phymode(struct b43legacy_wl * wl,unsigned int new_mode)2582 static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
2583 				      unsigned int new_mode)
2584 {
2585 	struct b43legacy_wldev *up_dev;
2586 	struct b43legacy_wldev *down_dev;
2587 	int err;
2588 	bool gmode = false;
2589 	int prev_status;
2590 
2591 	err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
2592 	if (err) {
2593 		b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
2594 		       phymode_to_string(new_mode));
2595 		return err;
2596 	}
2597 	if ((up_dev == wl->current_dev) &&
2598 	    (!!wl->current_dev->phy.gmode == !!gmode))
2599 		/* This device is already running. */
2600 		return 0;
2601 	b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
2602 	       phymode_to_string(new_mode));
2603 	down_dev = wl->current_dev;
2604 
2605 	prev_status = b43legacy_status(down_dev);
2606 	/* Shutdown the currently running core. */
2607 	if (prev_status >= B43legacy_STAT_STARTED)
2608 		b43legacy_wireless_core_stop(down_dev);
2609 	if (prev_status >= B43legacy_STAT_INITIALIZED)
2610 		b43legacy_wireless_core_exit(down_dev);
2611 
2612 	if (down_dev != up_dev)
2613 		/* We switch to a different core, so we put PHY into
2614 		 * RESET on the old core. */
2615 		b43legacy_put_phy_into_reset(down_dev);
2616 
2617 	/* Now start the new core. */
2618 	up_dev->phy.gmode = gmode;
2619 	if (prev_status >= B43legacy_STAT_INITIALIZED) {
2620 		err = b43legacy_wireless_core_init(up_dev);
2621 		if (err) {
2622 			b43legacyerr(wl, "Fatal: Could not initialize device"
2623 				     " for newly selected %s-PHY mode\n",
2624 				     phymode_to_string(new_mode));
2625 			goto init_failure;
2626 		}
2627 	}
2628 	if (prev_status >= B43legacy_STAT_STARTED) {
2629 		err = b43legacy_wireless_core_start(up_dev);
2630 		if (err) {
2631 			b43legacyerr(wl, "Fatal: Could not start device for "
2632 			       "newly selected %s-PHY mode\n",
2633 			       phymode_to_string(new_mode));
2634 			b43legacy_wireless_core_exit(up_dev);
2635 			goto init_failure;
2636 		}
2637 	}
2638 	B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
2639 
2640 	b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
2641 
2642 	wl->current_dev = up_dev;
2643 
2644 	return 0;
2645 init_failure:
2646 	/* Whoops, failed to init the new core. No core is operating now. */
2647 	wl->current_dev = NULL;
2648 	return err;
2649 }
2650 
2651 /* 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)2652 static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
2653 				       unsigned int short_retry,
2654 				       unsigned int long_retry)
2655 {
2656 	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
2657 	 * the chip-internal counter. */
2658 	short_retry = min(short_retry, (unsigned int)0xF);
2659 	long_retry = min(long_retry, (unsigned int)0xF);
2660 
2661 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
2662 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
2663 }
2664 
b43legacy_op_dev_config(struct ieee80211_hw * hw,u32 changed)2665 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
2666 				   u32 changed)
2667 {
2668 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2669 	struct b43legacy_wldev *dev;
2670 	struct b43legacy_phy *phy;
2671 	struct ieee80211_conf *conf = &hw->conf;
2672 	unsigned long flags;
2673 	unsigned int new_phymode = 0xFFFF;
2674 	int antenna_tx;
2675 	int err = 0;
2676 
2677 	antenna_tx = B43legacy_ANTENNA_DEFAULT;
2678 
2679 	mutex_lock(&wl->mutex);
2680 	dev = wl->current_dev;
2681 	phy = &dev->phy;
2682 
2683 	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
2684 		b43legacy_set_retry_limits(dev,
2685 					   conf->short_frame_max_tx_count,
2686 					   conf->long_frame_max_tx_count);
2687 	changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
2688 	if (!changed)
2689 		goto out_unlock_mutex;
2690 
2691 	/* Switch the PHY mode (if necessary). */
2692 	switch (conf->chandef.chan->band) {
2693 	case NL80211_BAND_2GHZ:
2694 		if (phy->type == B43legacy_PHYTYPE_B)
2695 			new_phymode = B43legacy_PHYMODE_B;
2696 		else
2697 			new_phymode = B43legacy_PHYMODE_G;
2698 		break;
2699 	default:
2700 		B43legacy_WARN_ON(1);
2701 	}
2702 	err = b43legacy_switch_phymode(wl, new_phymode);
2703 	if (err)
2704 		goto out_unlock_mutex;
2705 
2706 	/* Disable IRQs while reconfiguring the device.
2707 	 * This makes it possible to drop the spinlock throughout
2708 	 * the reconfiguration process. */
2709 	spin_lock_irqsave(&wl->irq_lock, flags);
2710 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2711 		spin_unlock_irqrestore(&wl->irq_lock, flags);
2712 		goto out_unlock_mutex;
2713 	}
2714 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2715 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2716 	b43legacy_synchronize_irq(dev);
2717 
2718 	/* Switch to the requested channel.
2719 	 * The firmware takes care of races with the TX handler. */
2720 	if (conf->chandef.chan->hw_value != phy->channel)
2721 		b43legacy_radio_selectchannel(dev, conf->chandef.chan->hw_value,
2722 					      0);
2723 
2724 	dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_MONITOR);
2725 
2726 	/* Adjust the desired TX power level. */
2727 	if (conf->power_level != 0) {
2728 		if (conf->power_level != phy->power_level) {
2729 			phy->power_level = conf->power_level;
2730 			b43legacy_phy_xmitpower(dev);
2731 		}
2732 	}
2733 
2734 	/* Antennas for RX and management frame TX. */
2735 	b43legacy_mgmtframe_txantenna(dev, antenna_tx);
2736 
2737 	if (wl->radio_enabled != phy->radio_on) {
2738 		if (wl->radio_enabled) {
2739 			b43legacy_radio_turn_on(dev);
2740 			b43legacyinfo(dev->wl, "Radio turned on by software\n");
2741 			if (!dev->radio_hw_enable)
2742 				b43legacyinfo(dev->wl, "The hardware RF-kill"
2743 					      " button still turns the radio"
2744 					      " physically off. Press the"
2745 					      " button to turn it on.\n");
2746 		} else {
2747 			b43legacy_radio_turn_off(dev, 0);
2748 			b43legacyinfo(dev->wl, "Radio turned off by"
2749 				      " software\n");
2750 		}
2751 	}
2752 
2753 	spin_lock_irqsave(&wl->irq_lock, flags);
2754 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2755 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2756 out_unlock_mutex:
2757 	mutex_unlock(&wl->mutex);
2758 
2759 	return err;
2760 }
2761 
b43legacy_update_basic_rates(struct b43legacy_wldev * dev,u32 brates)2762 static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
2763 {
2764 	struct ieee80211_supported_band *sband =
2765 		dev->wl->hw->wiphy->bands[NL80211_BAND_2GHZ];
2766 	const struct ieee80211_rate *rate;
2767 	int i;
2768 	u16 basic, direct, offset, basic_offset, rateptr;
2769 
2770 	for (i = 0; i < sband->n_bitrates; i++) {
2771 		rate = &sband->bitrates[i];
2772 
2773 		if (b43legacy_is_cck_rate(rate->hw_value)) {
2774 			direct = B43legacy_SHM_SH_CCKDIRECT;
2775 			basic = B43legacy_SHM_SH_CCKBASIC;
2776 			offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2777 			offset &= 0xF;
2778 		} else {
2779 			direct = B43legacy_SHM_SH_OFDMDIRECT;
2780 			basic = B43legacy_SHM_SH_OFDMBASIC;
2781 			offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2782 			offset &= 0xF;
2783 		}
2784 
2785 		rate = ieee80211_get_response_rate(sband, brates, rate->bitrate);
2786 
2787 		if (b43legacy_is_cck_rate(rate->hw_value)) {
2788 			basic_offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
2789 			basic_offset &= 0xF;
2790 		} else {
2791 			basic_offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
2792 			basic_offset &= 0xF;
2793 		}
2794 
2795 		/*
2796 		 * Get the pointer that we need to point to
2797 		 * from the direct map
2798 		 */
2799 		rateptr = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
2800 					       direct + 2 * basic_offset);
2801 		/* and write it to the basic map */
2802 		b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
2803 				      basic + 2 * offset, rateptr);
2804 	}
2805 }
2806 
b43legacy_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf,u64 changed)2807 static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
2808 				    struct ieee80211_vif *vif,
2809 				    struct ieee80211_bss_conf *conf,
2810 				    u64 changed)
2811 {
2812 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2813 	struct b43legacy_wldev *dev;
2814 	unsigned long flags;
2815 
2816 	mutex_lock(&wl->mutex);
2817 	B43legacy_WARN_ON(wl->vif != vif);
2818 
2819 	dev = wl->current_dev;
2820 
2821 	/* Disable IRQs while reconfiguring the device.
2822 	 * This makes it possible to drop the spinlock throughout
2823 	 * the reconfiguration process. */
2824 	spin_lock_irqsave(&wl->irq_lock, flags);
2825 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
2826 		spin_unlock_irqrestore(&wl->irq_lock, flags);
2827 		goto out_unlock_mutex;
2828 	}
2829 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2830 
2831 	if (changed & BSS_CHANGED_BSSID) {
2832 		b43legacy_synchronize_irq(dev);
2833 
2834 		if (conf->bssid)
2835 			memcpy(wl->bssid, conf->bssid, ETH_ALEN);
2836 		else
2837 			eth_zero_addr(wl->bssid);
2838 	}
2839 
2840 	if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
2841 		if (changed & BSS_CHANGED_BEACON &&
2842 		    (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2843 		     b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2844 			b43legacy_update_templates(wl);
2845 
2846 		if (changed & BSS_CHANGED_BSSID)
2847 			b43legacy_write_mac_bssid_templates(dev);
2848 	}
2849 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2850 
2851 	b43legacy_mac_suspend(dev);
2852 
2853 	if (changed & BSS_CHANGED_BEACON_INT &&
2854 	    (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
2855 	     b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
2856 		b43legacy_set_beacon_int(dev, conf->beacon_int);
2857 
2858 	if (changed & BSS_CHANGED_BASIC_RATES)
2859 		b43legacy_update_basic_rates(dev, conf->basic_rates);
2860 
2861 	if (changed & BSS_CHANGED_ERP_SLOT) {
2862 		if (conf->use_short_slot)
2863 			b43legacy_short_slot_timing_enable(dev);
2864 		else
2865 			b43legacy_short_slot_timing_disable(dev);
2866 	}
2867 
2868 	b43legacy_mac_enable(dev);
2869 
2870 	spin_lock_irqsave(&wl->irq_lock, flags);
2871 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2872 	/* XXX: why? */
2873 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2874  out_unlock_mutex:
2875 	mutex_unlock(&wl->mutex);
2876 }
2877 
b43legacy_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed,unsigned int * fflags,u64 multicast)2878 static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
2879 					  unsigned int changed,
2880 					  unsigned int *fflags,u64 multicast)
2881 {
2882 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
2883 	struct b43legacy_wldev *dev = wl->current_dev;
2884 	unsigned long flags;
2885 
2886 	if (!dev) {
2887 		*fflags = 0;
2888 		return;
2889 	}
2890 
2891 	spin_lock_irqsave(&wl->irq_lock, flags);
2892 	*fflags &= FIF_ALLMULTI |
2893 		  FIF_FCSFAIL |
2894 		  FIF_PLCPFAIL |
2895 		  FIF_CONTROL |
2896 		  FIF_OTHER_BSS |
2897 		  FIF_BCN_PRBRESP_PROMISC;
2898 
2899 	changed &= FIF_ALLMULTI |
2900 		   FIF_FCSFAIL |
2901 		   FIF_PLCPFAIL |
2902 		   FIF_CONTROL |
2903 		   FIF_OTHER_BSS |
2904 		   FIF_BCN_PRBRESP_PROMISC;
2905 
2906 	wl->filter_flags = *fflags;
2907 
2908 	if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
2909 		b43legacy_adjust_opmode(dev);
2910 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2911 }
2912 
2913 /* Locking: wl->mutex */
b43legacy_wireless_core_stop(struct b43legacy_wldev * dev)2914 static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
2915 {
2916 	struct b43legacy_wl *wl = dev->wl;
2917 	unsigned long flags;
2918 	int queue_num;
2919 
2920 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
2921 		return;
2922 
2923 	/* Disable and sync interrupts. We must do this before than
2924 	 * setting the status to INITIALIZED, as the interrupt handler
2925 	 * won't care about IRQs then. */
2926 	spin_lock_irqsave(&wl->irq_lock, flags);
2927 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
2928 	b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
2929 	spin_unlock_irqrestore(&wl->irq_lock, flags);
2930 	b43legacy_synchronize_irq(dev);
2931 
2932 	b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
2933 
2934 	mutex_unlock(&wl->mutex);
2935 	/* Must unlock as it would otherwise deadlock. No races here.
2936 	 * Cancel the possibly running self-rearming periodic work. */
2937 	cancel_delayed_work_sync(&dev->periodic_work);
2938 	cancel_work_sync(&wl->tx_work);
2939 	mutex_lock(&wl->mutex);
2940 
2941 	/* Drain all TX queues. */
2942 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
2943 		while (skb_queue_len(&wl->tx_queue[queue_num]))
2944 			dev_kfree_skb(skb_dequeue(&wl->tx_queue[queue_num]));
2945 	}
2946 
2947 	b43legacy_mac_suspend(dev);
2948 	free_irq(dev->dev->irq, dev);
2949 	b43legacydbg(wl, "Wireless interface stopped\n");
2950 }
2951 
2952 /* Locking: wl->mutex */
b43legacy_wireless_core_start(struct b43legacy_wldev * dev)2953 static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
2954 {
2955 	int err;
2956 
2957 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
2958 
2959 	drain_txstatus_queue(dev);
2960 	err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
2961 			  IRQF_SHARED, KBUILD_MODNAME, dev);
2962 	if (err) {
2963 		b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
2964 		       dev->dev->irq);
2965 		goto out;
2966 	}
2967 	/* We are ready to run. */
2968 	ieee80211_wake_queues(dev->wl->hw);
2969 	b43legacy_set_status(dev, B43legacy_STAT_STARTED);
2970 
2971 	/* Start data flow (TX/RX) */
2972 	b43legacy_mac_enable(dev);
2973 	b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
2974 
2975 	/* Start maintenance work */
2976 	b43legacy_periodic_tasks_setup(dev);
2977 
2978 	b43legacydbg(dev->wl, "Wireless interface started\n");
2979 out:
2980 	return err;
2981 }
2982 
2983 /* Get PHY and RADIO versioning numbers */
b43legacy_phy_versioning(struct b43legacy_wldev * dev)2984 static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
2985 {
2986 	struct b43legacy_phy *phy = &dev->phy;
2987 	u32 tmp;
2988 	u8 analog_type;
2989 	u8 phy_type;
2990 	u8 phy_rev;
2991 	u16 radio_manuf;
2992 	u16 radio_ver;
2993 	u16 radio_rev;
2994 	int unsupported = 0;
2995 
2996 	/* Get PHY versioning */
2997 	tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
2998 	analog_type = (tmp & B43legacy_PHYVER_ANALOG)
2999 		      >> B43legacy_PHYVER_ANALOG_SHIFT;
3000 	phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
3001 	phy_rev = (tmp & B43legacy_PHYVER_VERSION);
3002 	switch (phy_type) {
3003 	case B43legacy_PHYTYPE_B:
3004 		if (phy_rev != 2 && phy_rev != 4
3005 		    && phy_rev != 6 && phy_rev != 7)
3006 			unsupported = 1;
3007 		break;
3008 	case B43legacy_PHYTYPE_G:
3009 		if (phy_rev > 8)
3010 			unsupported = 1;
3011 		break;
3012 	default:
3013 		unsupported = 1;
3014 	}
3015 	if (unsupported) {
3016 		b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
3017 		       "(Analog %u, Type %u, Revision %u)\n",
3018 		       analog_type, phy_type, phy_rev);
3019 		return -EOPNOTSUPP;
3020 	}
3021 	b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
3022 	       analog_type, phy_type, phy_rev);
3023 
3024 
3025 	/* Get RADIO versioning */
3026 	if (dev->dev->bus->chip_id == 0x4317) {
3027 		if (dev->dev->bus->chip_rev == 0)
3028 			tmp = 0x3205017F;
3029 		else if (dev->dev->bus->chip_rev == 1)
3030 			tmp = 0x4205017F;
3031 		else
3032 			tmp = 0x5205017F;
3033 	} else {
3034 		b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3035 				  B43legacy_RADIOCTL_ID);
3036 		tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
3037 		tmp <<= 16;
3038 		b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
3039 				  B43legacy_RADIOCTL_ID);
3040 		tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
3041 	}
3042 	radio_manuf = (tmp & 0x00000FFF);
3043 	radio_ver = (tmp & 0x0FFFF000) >> 12;
3044 	radio_rev = (tmp & 0xF0000000) >> 28;
3045 	switch (phy_type) {
3046 	case B43legacy_PHYTYPE_B:
3047 		if ((radio_ver & 0xFFF0) != 0x2050)
3048 			unsupported = 1;
3049 		break;
3050 	case B43legacy_PHYTYPE_G:
3051 		if (radio_ver != 0x2050)
3052 			unsupported = 1;
3053 		break;
3054 	default:
3055 		B43legacy_BUG_ON(1);
3056 	}
3057 	if (unsupported) {
3058 		b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
3059 		       "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
3060 		       radio_manuf, radio_ver, radio_rev);
3061 		return -EOPNOTSUPP;
3062 	}
3063 	b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
3064 		     " Revision %u\n", radio_manuf, radio_ver, radio_rev);
3065 
3066 
3067 	phy->radio_manuf = radio_manuf;
3068 	phy->radio_ver = radio_ver;
3069 	phy->radio_rev = radio_rev;
3070 
3071 	phy->analog = analog_type;
3072 	phy->type = phy_type;
3073 	phy->rev = phy_rev;
3074 
3075 	return 0;
3076 }
3077 
setup_struct_phy_for_init(struct b43legacy_wldev * dev,struct b43legacy_phy * phy)3078 static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
3079 				      struct b43legacy_phy *phy)
3080 {
3081 	struct b43legacy_lopair *lo;
3082 	int i;
3083 
3084 	memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3085 	memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3086 
3087 	/* Assume the radio is enabled. If it's not enabled, the state will
3088 	 * immediately get fixed on the first periodic work run. */
3089 	dev->radio_hw_enable = true;
3090 
3091 	phy->savedpctlreg = 0xFFFF;
3092 	phy->aci_enable = false;
3093 	phy->aci_wlan_automatic = false;
3094 	phy->aci_hw_rssi = false;
3095 
3096 	lo = phy->_lo_pairs;
3097 	if (lo)
3098 		memset(lo, 0, sizeof(struct b43legacy_lopair) *
3099 				     B43legacy_LO_COUNT);
3100 	phy->max_lb_gain = 0;
3101 	phy->trsw_rx_gain = 0;
3102 
3103 	/* Set default attenuation values. */
3104 	phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3105 	phy->rfatt = b43legacy_default_radio_attenuation(dev);
3106 	phy->txctl1 = b43legacy_default_txctl1(dev);
3107 	phy->txpwr_offset = 0;
3108 
3109 	/* NRSSI */
3110 	phy->nrssislope = 0;
3111 	for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3112 		phy->nrssi[i] = -1000;
3113 	for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3114 		phy->nrssi_lt[i] = i;
3115 
3116 	phy->lofcal = 0xFFFF;
3117 	phy->initval = 0xFFFF;
3118 
3119 	phy->interfmode = B43legacy_INTERFMODE_NONE;
3120 	phy->channel = 0xFF;
3121 }
3122 
setup_struct_wldev_for_init(struct b43legacy_wldev * dev)3123 static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
3124 {
3125 	/* Flags */
3126 	dev->dfq_valid = false;
3127 
3128 	/* Stats */
3129 	memset(&dev->stats, 0, sizeof(dev->stats));
3130 
3131 	setup_struct_phy_for_init(dev, &dev->phy);
3132 
3133 	/* IRQ related flags */
3134 	dev->irq_reason = 0;
3135 	memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
3136 	dev->irq_mask = B43legacy_IRQ_MASKTEMPLATE;
3137 
3138 	dev->mac_suspended = 1;
3139 
3140 	/* Noise calculation context */
3141 	memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
3142 }
3143 
b43legacy_set_synth_pu_delay(struct b43legacy_wldev * dev,bool idle)3144 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
3145 					  bool idle) {
3146 	u16 pu_delay = 1050;
3147 
3148 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC) || idle)
3149 		pu_delay = 500;
3150 	if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
3151 		pu_delay = max(pu_delay, (u16)2400);
3152 
3153 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3154 			      B43legacy_SHM_SH_SPUWKUP, pu_delay);
3155 }
3156 
3157 /* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
b43legacy_set_pretbtt(struct b43legacy_wldev * dev)3158 static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
3159 {
3160 	u16 pretbtt;
3161 
3162 	/* The time value is in microseconds. */
3163 	if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
3164 		pretbtt = 2;
3165 	else
3166 		pretbtt = 250;
3167 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3168 			      B43legacy_SHM_SH_PRETBTT, pretbtt);
3169 	b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
3170 }
3171 
3172 /* Shutdown a wireless core */
3173 /* Locking: wl->mutex */
b43legacy_wireless_core_exit(struct b43legacy_wldev * dev)3174 static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
3175 {
3176 	struct b43legacy_phy *phy = &dev->phy;
3177 	u32 macctl;
3178 
3179 	B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
3180 	if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
3181 		return;
3182 	b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
3183 
3184 	/* Stop the microcode PSM. */
3185 	macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
3186 	macctl &= ~B43legacy_MACCTL_PSM_RUN;
3187 	macctl |= B43legacy_MACCTL_PSM_JMP0;
3188 	b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
3189 
3190 	b43legacy_leds_exit(dev);
3191 	b43legacy_rng_exit(dev->wl);
3192 	b43legacy_pio_free(dev);
3193 	b43legacy_dma_free(dev);
3194 	b43legacy_chip_exit(dev);
3195 	b43legacy_radio_turn_off(dev, 1);
3196 	b43legacy_switch_analog(dev, 0);
3197 	if (phy->dyn_tssi_tbl)
3198 		kfree(phy->tssi2dbm);
3199 	kfree(phy->lo_control);
3200 	phy->lo_control = NULL;
3201 	if (dev->wl->current_beacon) {
3202 		dev_kfree_skb_any(dev->wl->current_beacon);
3203 		dev->wl->current_beacon = NULL;
3204 	}
3205 
3206 	ssb_device_disable(dev->dev, 0);
3207 	ssb_bus_may_powerdown(dev->dev->bus);
3208 }
3209 
prepare_phy_data_for_init(struct b43legacy_wldev * dev)3210 static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
3211 {
3212 	struct b43legacy_phy *phy = &dev->phy;
3213 	int i;
3214 
3215 	/* Set default attenuation values. */
3216 	phy->bbatt = b43legacy_default_baseband_attenuation(dev);
3217 	phy->rfatt = b43legacy_default_radio_attenuation(dev);
3218 	phy->txctl1 = b43legacy_default_txctl1(dev);
3219 	phy->txctl2 = 0xFFFF;
3220 	phy->txpwr_offset = 0;
3221 
3222 	/* NRSSI */
3223 	phy->nrssislope = 0;
3224 	for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
3225 		phy->nrssi[i] = -1000;
3226 	for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
3227 		phy->nrssi_lt[i] = i;
3228 
3229 	phy->lofcal = 0xFFFF;
3230 	phy->initval = 0xFFFF;
3231 
3232 	phy->aci_enable = false;
3233 	phy->aci_wlan_automatic = false;
3234 	phy->aci_hw_rssi = false;
3235 
3236 	phy->antenna_diversity = 0xFFFF;
3237 	memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
3238 	memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
3239 
3240 	/* Flags */
3241 	phy->calibrated = 0;
3242 
3243 	if (phy->_lo_pairs)
3244 		memset(phy->_lo_pairs, 0,
3245 		       sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
3246 	memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
3247 }
3248 
3249 /* Initialize a wireless core */
b43legacy_wireless_core_init(struct b43legacy_wldev * dev)3250 static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
3251 {
3252 	struct b43legacy_wl *wl = dev->wl;
3253 	struct ssb_bus *bus = dev->dev->bus;
3254 	struct b43legacy_phy *phy = &dev->phy;
3255 	struct ssb_sprom *sprom = &dev->dev->bus->sprom;
3256 	int err;
3257 	u32 hf;
3258 	u32 tmp;
3259 
3260 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3261 
3262 	err = ssb_bus_powerup(bus, 0);
3263 	if (err)
3264 		goto out;
3265 	if (!ssb_device_is_enabled(dev->dev)) {
3266 		tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
3267 		b43legacy_wireless_core_reset(dev, tmp);
3268 	}
3269 
3270 	if ((phy->type == B43legacy_PHYTYPE_B) ||
3271 	    (phy->type == B43legacy_PHYTYPE_G)) {
3272 		phy->_lo_pairs = kcalloc(B43legacy_LO_COUNT,
3273 					 sizeof(struct b43legacy_lopair),
3274 					 GFP_KERNEL);
3275 		if (!phy->_lo_pairs)
3276 			return -ENOMEM;
3277 	}
3278 	setup_struct_wldev_for_init(dev);
3279 
3280 	err = b43legacy_phy_init_tssi2dbm_table(dev);
3281 	if (err)
3282 		goto err_kfree_lo_control;
3283 
3284 	/* Enable IRQ routing to this device. */
3285 	ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
3286 
3287 	prepare_phy_data_for_init(dev);
3288 	b43legacy_phy_calibrate(dev);
3289 	err = b43legacy_chip_init(dev);
3290 	if (err)
3291 		goto err_kfree_tssitbl;
3292 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3293 			      B43legacy_SHM_SH_WLCOREREV,
3294 			      dev->dev->id.revision);
3295 	hf = b43legacy_hf_read(dev);
3296 	if (phy->type == B43legacy_PHYTYPE_G) {
3297 		hf |= B43legacy_HF_SYMW;
3298 		if (phy->rev == 1)
3299 			hf |= B43legacy_HF_GDCW;
3300 		if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
3301 			hf |= B43legacy_HF_OFDMPABOOST;
3302 	} else if (phy->type == B43legacy_PHYTYPE_B) {
3303 		hf |= B43legacy_HF_SYMW;
3304 		if (phy->rev >= 2 && phy->radio_ver == 0x2050)
3305 			hf &= ~B43legacy_HF_GDCW;
3306 	}
3307 	b43legacy_hf_write(dev, hf);
3308 
3309 	b43legacy_set_retry_limits(dev,
3310 				   B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
3311 				   B43legacy_DEFAULT_LONG_RETRY_LIMIT);
3312 
3313 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3314 			      0x0044, 3);
3315 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3316 			      0x0046, 2);
3317 
3318 	/* Disable sending probe responses from firmware.
3319 	 * Setting the MaxTime to one usec will always trigger
3320 	 * a timeout, so we never send any probe resp.
3321 	 * A timeout of zero is infinite. */
3322 	b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
3323 			      B43legacy_SHM_SH_PRMAXTIME, 1);
3324 
3325 	b43legacy_rate_memory_init(dev);
3326 
3327 	/* Minimum Contention Window */
3328 	if (phy->type == B43legacy_PHYTYPE_B)
3329 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3330 				      0x0003, 31);
3331 	else
3332 		b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3333 				      0x0003, 15);
3334 	/* Maximum Contention Window */
3335 	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
3336 			      0x0004, 1023);
3337 
3338 	do {
3339 		if (b43legacy_using_pio(dev))
3340 			err = b43legacy_pio_init(dev);
3341 		else {
3342 			err = b43legacy_dma_init(dev);
3343 			if (!err)
3344 				b43legacy_qos_init(dev);
3345 		}
3346 	} while (err == -EAGAIN);
3347 	if (err)
3348 		goto err_chip_exit;
3349 
3350 	b43legacy_set_synth_pu_delay(dev, 1);
3351 
3352 	ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
3353 	b43legacy_upload_card_macaddress(dev);
3354 	b43legacy_security_init(dev);
3355 	b43legacy_rng_init(wl);
3356 
3357 	ieee80211_wake_queues(dev->wl->hw);
3358 	b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
3359 
3360 	b43legacy_leds_init(dev);
3361 out:
3362 	return err;
3363 
3364 err_chip_exit:
3365 	b43legacy_chip_exit(dev);
3366 err_kfree_tssitbl:
3367 	if (phy->dyn_tssi_tbl)
3368 		kfree(phy->tssi2dbm);
3369 err_kfree_lo_control:
3370 	kfree(phy->lo_control);
3371 	phy->lo_control = NULL;
3372 	ssb_bus_may_powerdown(bus);
3373 	B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
3374 	return err;
3375 }
3376 
b43legacy_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3377 static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
3378 				      struct ieee80211_vif *vif)
3379 {
3380 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3381 	struct b43legacy_wldev *dev;
3382 	unsigned long flags;
3383 	int err = -EOPNOTSUPP;
3384 
3385 	/* TODO: allow AP devices to coexist */
3386 
3387 	if (vif->type != NL80211_IFTYPE_AP &&
3388 	    vif->type != NL80211_IFTYPE_STATION &&
3389 	    vif->type != NL80211_IFTYPE_ADHOC)
3390 		return -EOPNOTSUPP;
3391 
3392 	mutex_lock(&wl->mutex);
3393 	if (wl->operating)
3394 		goto out_mutex_unlock;
3395 
3396 	b43legacydbg(wl, "Adding Interface type %d\n", vif->type);
3397 
3398 	dev = wl->current_dev;
3399 	wl->operating = true;
3400 	wl->vif = vif;
3401 	wl->if_type = vif->type;
3402 	memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
3403 
3404 	spin_lock_irqsave(&wl->irq_lock, flags);
3405 	b43legacy_adjust_opmode(dev);
3406 	b43legacy_set_pretbtt(dev);
3407 	b43legacy_set_synth_pu_delay(dev, 0);
3408 	b43legacy_upload_card_macaddress(dev);
3409 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3410 
3411 	err = 0;
3412  out_mutex_unlock:
3413 	mutex_unlock(&wl->mutex);
3414 
3415 	return err;
3416 }
3417 
b43legacy_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3418 static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
3419 					  struct ieee80211_vif *vif)
3420 {
3421 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3422 	struct b43legacy_wldev *dev = wl->current_dev;
3423 	unsigned long flags;
3424 
3425 	b43legacydbg(wl, "Removing Interface type %d\n", vif->type);
3426 
3427 	mutex_lock(&wl->mutex);
3428 
3429 	B43legacy_WARN_ON(!wl->operating);
3430 	B43legacy_WARN_ON(wl->vif != vif);
3431 	wl->vif = NULL;
3432 
3433 	wl->operating = false;
3434 
3435 	spin_lock_irqsave(&wl->irq_lock, flags);
3436 	b43legacy_adjust_opmode(dev);
3437 	eth_zero_addr(wl->mac_addr);
3438 	b43legacy_upload_card_macaddress(dev);
3439 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3440 
3441 	mutex_unlock(&wl->mutex);
3442 }
3443 
b43legacy_op_start(struct ieee80211_hw * hw)3444 static int b43legacy_op_start(struct ieee80211_hw *hw)
3445 {
3446 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3447 	struct b43legacy_wldev *dev = wl->current_dev;
3448 	int did_init = 0;
3449 	int err = 0;
3450 
3451 	/* Kill all old instance specific information to make sure
3452 	 * the card won't use it in the short timeframe between start
3453 	 * and mac80211 reconfiguring it. */
3454 	eth_zero_addr(wl->bssid);
3455 	eth_zero_addr(wl->mac_addr);
3456 	wl->filter_flags = 0;
3457 	wl->beacon0_uploaded = false;
3458 	wl->beacon1_uploaded = false;
3459 	wl->beacon_templates_virgin = true;
3460 	wl->radio_enabled = true;
3461 
3462 	mutex_lock(&wl->mutex);
3463 
3464 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
3465 		err = b43legacy_wireless_core_init(dev);
3466 		if (err)
3467 			goto out_mutex_unlock;
3468 		did_init = 1;
3469 	}
3470 
3471 	if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
3472 		err = b43legacy_wireless_core_start(dev);
3473 		if (err) {
3474 			if (did_init)
3475 				b43legacy_wireless_core_exit(dev);
3476 			goto out_mutex_unlock;
3477 		}
3478 	}
3479 
3480 	wiphy_rfkill_start_polling(hw->wiphy);
3481 
3482 out_mutex_unlock:
3483 	mutex_unlock(&wl->mutex);
3484 
3485 	return err;
3486 }
3487 
b43legacy_op_stop(struct ieee80211_hw * hw)3488 static void b43legacy_op_stop(struct ieee80211_hw *hw)
3489 {
3490 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3491 	struct b43legacy_wldev *dev = wl->current_dev;
3492 
3493 	cancel_work_sync(&(wl->beacon_update_trigger));
3494 
3495 	mutex_lock(&wl->mutex);
3496 	if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
3497 		b43legacy_wireless_core_stop(dev);
3498 	b43legacy_wireless_core_exit(dev);
3499 	wl->radio_enabled = false;
3500 	mutex_unlock(&wl->mutex);
3501 }
3502 
b43legacy_op_beacon_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)3503 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
3504 				       struct ieee80211_sta *sta, bool set)
3505 {
3506 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3507 	unsigned long flags;
3508 
3509 	spin_lock_irqsave(&wl->irq_lock, flags);
3510 	b43legacy_update_templates(wl);
3511 	spin_unlock_irqrestore(&wl->irq_lock, flags);
3512 
3513 	return 0;
3514 }
3515 
b43legacy_op_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)3516 static int b43legacy_op_get_survey(struct ieee80211_hw *hw, int idx,
3517 				   struct survey_info *survey)
3518 {
3519 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
3520 	struct b43legacy_wldev *dev = wl->current_dev;
3521 	struct ieee80211_conf *conf = &hw->conf;
3522 
3523 	if (idx != 0)
3524 		return -ENOENT;
3525 
3526 	survey->channel = conf->chandef.chan;
3527 	survey->filled = SURVEY_INFO_NOISE_DBM;
3528 	survey->noise = dev->stats.link_noise;
3529 
3530 	return 0;
3531 }
3532 
3533 static const struct ieee80211_ops b43legacy_hw_ops = {
3534 	.tx			= b43legacy_op_tx,
3535 	.wake_tx_queue		= ieee80211_handle_wake_tx_queue,
3536 	.conf_tx		= b43legacy_op_conf_tx,
3537 	.add_interface		= b43legacy_op_add_interface,
3538 	.remove_interface	= b43legacy_op_remove_interface,
3539 	.config			= b43legacy_op_dev_config,
3540 	.bss_info_changed	= b43legacy_op_bss_info_changed,
3541 	.configure_filter	= b43legacy_op_configure_filter,
3542 	.get_stats		= b43legacy_op_get_stats,
3543 	.start			= b43legacy_op_start,
3544 	.stop			= b43legacy_op_stop,
3545 	.set_tim		= b43legacy_op_beacon_set_tim,
3546 	.get_survey		= b43legacy_op_get_survey,
3547 	.rfkill_poll		= b43legacy_rfkill_poll,
3548 };
3549 
3550 /* Hard-reset the chip. Do not call this directly.
3551  * Use b43legacy_controller_restart()
3552  */
b43legacy_chip_reset(struct work_struct * work)3553 static void b43legacy_chip_reset(struct work_struct *work)
3554 {
3555 	struct b43legacy_wldev *dev =
3556 		container_of(work, struct b43legacy_wldev, restart_work);
3557 	struct b43legacy_wl *wl = dev->wl;
3558 	int err = 0;
3559 	int prev_status;
3560 
3561 	mutex_lock(&wl->mutex);
3562 
3563 	prev_status = b43legacy_status(dev);
3564 	/* Bring the device down... */
3565 	if (prev_status >= B43legacy_STAT_STARTED)
3566 		b43legacy_wireless_core_stop(dev);
3567 	if (prev_status >= B43legacy_STAT_INITIALIZED)
3568 		b43legacy_wireless_core_exit(dev);
3569 
3570 	/* ...and up again. */
3571 	if (prev_status >= B43legacy_STAT_INITIALIZED) {
3572 		err = b43legacy_wireless_core_init(dev);
3573 		if (err)
3574 			goto out;
3575 	}
3576 	if (prev_status >= B43legacy_STAT_STARTED) {
3577 		err = b43legacy_wireless_core_start(dev);
3578 		if (err) {
3579 			b43legacy_wireless_core_exit(dev);
3580 			goto out;
3581 		}
3582 	}
3583 out:
3584 	if (err)
3585 		wl->current_dev = NULL; /* Failed to init the dev. */
3586 	mutex_unlock(&wl->mutex);
3587 	if (err)
3588 		b43legacyerr(wl, "Controller restart FAILED\n");
3589 	else
3590 		b43legacyinfo(wl, "Controller restarted\n");
3591 }
3592 
b43legacy_setup_modes(struct b43legacy_wldev * dev,int have_bphy,int have_gphy)3593 static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
3594 				 int have_bphy,
3595 				 int have_gphy)
3596 {
3597 	struct ieee80211_hw *hw = dev->wl->hw;
3598 	struct b43legacy_phy *phy = &dev->phy;
3599 
3600 	phy->possible_phymodes = 0;
3601 	if (have_bphy) {
3602 		hw->wiphy->bands[NL80211_BAND_2GHZ] =
3603 			&b43legacy_band_2GHz_BPHY;
3604 		phy->possible_phymodes |= B43legacy_PHYMODE_B;
3605 	}
3606 
3607 	if (have_gphy) {
3608 		hw->wiphy->bands[NL80211_BAND_2GHZ] =
3609 			&b43legacy_band_2GHz_GPHY;
3610 		phy->possible_phymodes |= B43legacy_PHYMODE_G;
3611 	}
3612 
3613 	return 0;
3614 }
3615 
b43legacy_wireless_core_detach(struct b43legacy_wldev * dev)3616 static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
3617 {
3618 	/* We release firmware that late to not be required to re-request
3619 	 * is all the time when we reinit the core. */
3620 	b43legacy_release_firmware(dev);
3621 }
3622 
b43legacy_wireless_core_attach(struct b43legacy_wldev * dev)3623 static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
3624 {
3625 	struct b43legacy_wl *wl = dev->wl;
3626 	struct ssb_bus *bus = dev->dev->bus;
3627 	struct pci_dev *pdev = (bus->bustype == SSB_BUSTYPE_PCI) ? bus->host_pci : NULL;
3628 	int err;
3629 	int have_bphy = 0;
3630 	int have_gphy = 0;
3631 	u32 tmp;
3632 
3633 	/* Do NOT do any device initialization here.
3634 	 * Do it in wireless_core_init() instead.
3635 	 * This function is for gathering basic information about the HW, only.
3636 	 * Also some structs may be set up here. But most likely you want to
3637 	 * have that in core_init(), too.
3638 	 */
3639 
3640 	err = ssb_bus_powerup(bus, 0);
3641 	if (err) {
3642 		b43legacyerr(wl, "Bus powerup failed\n");
3643 		goto out;
3644 	}
3645 	/* Get the PHY type. */
3646 	if (dev->dev->id.revision >= 5) {
3647 		u32 tmshigh;
3648 
3649 		tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
3650 		have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
3651 		if (!have_gphy)
3652 			have_bphy = 1;
3653 	} else if (dev->dev->id.revision == 4)
3654 		have_gphy = 1;
3655 	else
3656 		have_bphy = 1;
3657 
3658 	dev->phy.gmode = (have_gphy || have_bphy);
3659 	dev->phy.radio_on = true;
3660 	tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3661 	b43legacy_wireless_core_reset(dev, tmp);
3662 
3663 	err = b43legacy_phy_versioning(dev);
3664 	if (err)
3665 		goto err_powerdown;
3666 	/* Check if this device supports multiband. */
3667 	if (!pdev ||
3668 	    (pdev->device != 0x4312 &&
3669 	     pdev->device != 0x4319 &&
3670 	     pdev->device != 0x4324)) {
3671 		/* No multiband support. */
3672 		have_bphy = 0;
3673 		have_gphy = 0;
3674 		switch (dev->phy.type) {
3675 		case B43legacy_PHYTYPE_B:
3676 			have_bphy = 1;
3677 			break;
3678 		case B43legacy_PHYTYPE_G:
3679 			have_gphy = 1;
3680 			break;
3681 		default:
3682 			B43legacy_BUG_ON(1);
3683 		}
3684 	}
3685 	dev->phy.gmode = (have_gphy || have_bphy);
3686 	tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
3687 	b43legacy_wireless_core_reset(dev, tmp);
3688 
3689 	err = b43legacy_validate_chipaccess(dev);
3690 	if (err)
3691 		goto err_powerdown;
3692 	err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
3693 	if (err)
3694 		goto err_powerdown;
3695 
3696 	/* Now set some default "current_dev" */
3697 	if (!wl->current_dev)
3698 		wl->current_dev = dev;
3699 	INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
3700 
3701 	b43legacy_radio_turn_off(dev, 1);
3702 	b43legacy_switch_analog(dev, 0);
3703 	ssb_device_disable(dev->dev, 0);
3704 	ssb_bus_may_powerdown(bus);
3705 
3706 out:
3707 	return err;
3708 
3709 err_powerdown:
3710 	ssb_bus_may_powerdown(bus);
3711 	return err;
3712 }
3713 
b43legacy_one_core_detach(struct ssb_device * dev)3714 static void b43legacy_one_core_detach(struct ssb_device *dev)
3715 {
3716 	struct b43legacy_wldev *wldev;
3717 	struct b43legacy_wl *wl;
3718 
3719 	/* Do not cancel ieee80211-workqueue based work here.
3720 	 * See comment in b43legacy_remove(). */
3721 
3722 	wldev = ssb_get_drvdata(dev);
3723 	wl = wldev->wl;
3724 	b43legacy_debugfs_remove_device(wldev);
3725 	b43legacy_wireless_core_detach(wldev);
3726 	list_del(&wldev->list);
3727 	wl->nr_devs--;
3728 	ssb_set_drvdata(dev, NULL);
3729 	kfree(wldev);
3730 }
3731 
b43legacy_one_core_attach(struct ssb_device * dev,struct b43legacy_wl * wl)3732 static int b43legacy_one_core_attach(struct ssb_device *dev,
3733 				     struct b43legacy_wl *wl)
3734 {
3735 	struct b43legacy_wldev *wldev;
3736 	int err = -ENOMEM;
3737 
3738 	wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
3739 	if (!wldev)
3740 		goto out;
3741 
3742 	wldev->dev = dev;
3743 	wldev->wl = wl;
3744 	b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
3745 	wldev->bad_frames_preempt = modparam_bad_frames_preempt;
3746 	tasklet_setup(&wldev->isr_tasklet, b43legacy_interrupt_tasklet);
3747 	if (modparam_pio)
3748 		wldev->__using_pio = true;
3749 	INIT_LIST_HEAD(&wldev->list);
3750 
3751 	err = b43legacy_wireless_core_attach(wldev);
3752 	if (err)
3753 		goto err_kfree_wldev;
3754 
3755 	list_add(&wldev->list, &wl->devlist);
3756 	wl->nr_devs++;
3757 	ssb_set_drvdata(dev, wldev);
3758 	b43legacy_debugfs_add_device(wldev);
3759 out:
3760 	return err;
3761 
3762 err_kfree_wldev:
3763 	kfree(wldev);
3764 	return err;
3765 }
3766 
b43legacy_sprom_fixup(struct ssb_bus * bus)3767 static void b43legacy_sprom_fixup(struct ssb_bus *bus)
3768 {
3769 	/* boardflags workarounds */
3770 	if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
3771 	    bus->boardinfo.type == 0x4E &&
3772 	    bus->sprom.board_rev > 0x40)
3773 		bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
3774 }
3775 
b43legacy_wireless_exit(struct ssb_device * dev,struct b43legacy_wl * wl)3776 static void b43legacy_wireless_exit(struct ssb_device *dev,
3777 				  struct b43legacy_wl *wl)
3778 {
3779 	struct ieee80211_hw *hw = wl->hw;
3780 
3781 	ssb_set_devtypedata(dev, NULL);
3782 	ieee80211_free_hw(hw);
3783 }
3784 
b43legacy_wireless_init(struct ssb_device * dev)3785 static int b43legacy_wireless_init(struct ssb_device *dev)
3786 {
3787 	struct ssb_sprom *sprom = &dev->bus->sprom;
3788 	struct ieee80211_hw *hw;
3789 	struct b43legacy_wl *wl;
3790 	int err = -ENOMEM;
3791 	int queue_num;
3792 
3793 	b43legacy_sprom_fixup(dev->bus);
3794 
3795 	hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
3796 	if (!hw) {
3797 		b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
3798 		goto out;
3799 	}
3800 
3801 	/* fill hw info */
3802 	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
3803 	ieee80211_hw_set(hw, SIGNAL_DBM);
3804 	ieee80211_hw_set(hw, MFP_CAPABLE); /* Allow WPA3 in software */
3805 
3806 	hw->wiphy->interface_modes =
3807 		BIT(NL80211_IFTYPE_AP) |
3808 		BIT(NL80211_IFTYPE_STATION) |
3809 		BIT(NL80211_IFTYPE_ADHOC);
3810 	hw->queues = 1; /* FIXME: hardware has more queues */
3811 	hw->max_rates = 2;
3812 	SET_IEEE80211_DEV(hw, dev->dev);
3813 	if (is_valid_ether_addr(sprom->et1mac))
3814 		SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
3815 	else
3816 		SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
3817 
3818 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
3819 
3820 	/* Get and initialize struct b43legacy_wl */
3821 	wl = hw_to_b43legacy_wl(hw);
3822 	memset(wl, 0, sizeof(*wl));
3823 	wl->hw = hw;
3824 	spin_lock_init(&wl->irq_lock);
3825 	spin_lock_init(&wl->leds_lock);
3826 	mutex_init(&wl->mutex);
3827 	INIT_LIST_HEAD(&wl->devlist);
3828 	INIT_WORK(&wl->beacon_update_trigger, b43legacy_beacon_update_trigger_work);
3829 	INIT_WORK(&wl->tx_work, b43legacy_tx_work);
3830 
3831 	/* Initialize queues and flags. */
3832 	for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
3833 		skb_queue_head_init(&wl->tx_queue[queue_num]);
3834 		wl->tx_queue_stopped[queue_num] = 0;
3835 	}
3836 
3837 	ssb_set_devtypedata(dev, wl);
3838 	b43legacyinfo(wl, "Broadcom %04X WLAN found (core revision %u)\n",
3839 		      dev->bus->chip_id, dev->id.revision);
3840 	err = 0;
3841 out:
3842 	return err;
3843 }
3844 
b43legacy_probe(struct ssb_device * dev,const struct ssb_device_id * id)3845 static int b43legacy_probe(struct ssb_device *dev,
3846 			 const struct ssb_device_id *id)
3847 {
3848 	struct b43legacy_wl *wl;
3849 	int err;
3850 	int first = 0;
3851 
3852 	wl = ssb_get_devtypedata(dev);
3853 	if (!wl) {
3854 		/* Probing the first core - setup common struct b43legacy_wl */
3855 		first = 1;
3856 		err = b43legacy_wireless_init(dev);
3857 		if (err)
3858 			goto out;
3859 		wl = ssb_get_devtypedata(dev);
3860 		B43legacy_WARN_ON(!wl);
3861 	}
3862 	err = b43legacy_one_core_attach(dev, wl);
3863 	if (err)
3864 		goto err_wireless_exit;
3865 
3866 	/* setup and start work to load firmware */
3867 	INIT_WORK(&wl->firmware_load, b43legacy_request_firmware);
3868 	schedule_work(&wl->firmware_load);
3869 
3870 out:
3871 	return err;
3872 
3873 err_wireless_exit:
3874 	if (first)
3875 		b43legacy_wireless_exit(dev, wl);
3876 	return err;
3877 }
3878 
b43legacy_remove(struct ssb_device * dev)3879 static void b43legacy_remove(struct ssb_device *dev)
3880 {
3881 	struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
3882 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3883 
3884 	/* We must cancel any work here before unregistering from ieee80211,
3885 	 * as the ieee80211 unreg will destroy the workqueue. */
3886 	cancel_work_sync(&wldev->restart_work);
3887 	cancel_work_sync(&wl->firmware_load);
3888 	complete(&wldev->fw_load_complete);
3889 
3890 	B43legacy_WARN_ON(!wl);
3891 	if (!wldev->fw.ucode)
3892 		return;			/* NULL if fw never loaded */
3893 	if (wl->current_dev == wldev)
3894 		ieee80211_unregister_hw(wl->hw);
3895 
3896 	b43legacy_one_core_detach(dev);
3897 
3898 	if (list_empty(&wl->devlist))
3899 		/* Last core on the chip unregistered.
3900 		 * We can destroy common struct b43legacy_wl.
3901 		 */
3902 		b43legacy_wireless_exit(dev, wl);
3903 }
3904 
3905 /* Perform a hardware reset. This can be called from any context. */
b43legacy_controller_restart(struct b43legacy_wldev * dev,const char * reason)3906 void b43legacy_controller_restart(struct b43legacy_wldev *dev,
3907 				  const char *reason)
3908 {
3909 	/* Must avoid requeueing, if we are in shutdown. */
3910 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
3911 		return;
3912 	b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
3913 	ieee80211_queue_work(dev->wl->hw, &dev->restart_work);
3914 }
3915 
3916 #ifdef CONFIG_PM
3917 
b43legacy_suspend(struct ssb_device * dev,pm_message_t state)3918 static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
3919 {
3920 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3921 	struct b43legacy_wl *wl = wldev->wl;
3922 
3923 	b43legacydbg(wl, "Suspending...\n");
3924 
3925 	mutex_lock(&wl->mutex);
3926 	wldev->suspend_init_status = b43legacy_status(wldev);
3927 	if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
3928 		b43legacy_wireless_core_stop(wldev);
3929 	if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
3930 		b43legacy_wireless_core_exit(wldev);
3931 	mutex_unlock(&wl->mutex);
3932 
3933 	b43legacydbg(wl, "Device suspended.\n");
3934 
3935 	return 0;
3936 }
3937 
b43legacy_resume(struct ssb_device * dev)3938 static int b43legacy_resume(struct ssb_device *dev)
3939 {
3940 	struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
3941 	struct b43legacy_wl *wl = wldev->wl;
3942 	int err = 0;
3943 
3944 	b43legacydbg(wl, "Resuming...\n");
3945 
3946 	mutex_lock(&wl->mutex);
3947 	if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
3948 		err = b43legacy_wireless_core_init(wldev);
3949 		if (err) {
3950 			b43legacyerr(wl, "Resume failed at core init\n");
3951 			goto out;
3952 		}
3953 	}
3954 	if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
3955 		err = b43legacy_wireless_core_start(wldev);
3956 		if (err) {
3957 			b43legacy_wireless_core_exit(wldev);
3958 			b43legacyerr(wl, "Resume failed at core start\n");
3959 			goto out;
3960 		}
3961 	}
3962 
3963 	b43legacydbg(wl, "Device resumed.\n");
3964 out:
3965 	mutex_unlock(&wl->mutex);
3966 	return err;
3967 }
3968 
3969 #else	/* CONFIG_PM */
3970 # define b43legacy_suspend	NULL
3971 # define b43legacy_resume		NULL
3972 #endif	/* CONFIG_PM */
3973 
3974 static struct ssb_driver b43legacy_ssb_driver = {
3975 	.name		= KBUILD_MODNAME,
3976 	.id_table	= b43legacy_ssb_tbl,
3977 	.probe		= b43legacy_probe,
3978 	.remove		= b43legacy_remove,
3979 	.suspend	= b43legacy_suspend,
3980 	.resume		= b43legacy_resume,
3981 };
3982 
b43legacy_print_driverinfo(void)3983 static void b43legacy_print_driverinfo(void)
3984 {
3985 	const char *feat_pci = "", *feat_leds = "",
3986 		   *feat_pio = "", *feat_dma = "";
3987 
3988 #ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
3989 	feat_pci = "P";
3990 #endif
3991 #ifdef CONFIG_B43LEGACY_LEDS
3992 	feat_leds = "L";
3993 #endif
3994 #ifdef CONFIG_B43LEGACY_PIO
3995 	feat_pio = "I";
3996 #endif
3997 #ifdef CONFIG_B43LEGACY_DMA
3998 	feat_dma = "D";
3999 #endif
4000 	printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
4001 	       "[ Features: %s%s%s%s ]\n",
4002 	       feat_pci, feat_leds, feat_pio, feat_dma);
4003 }
4004 
b43legacy_init(void)4005 static int __init b43legacy_init(void)
4006 {
4007 	int err;
4008 
4009 	b43legacy_debugfs_init();
4010 
4011 	err = ssb_driver_register(&b43legacy_ssb_driver);
4012 	if (err)
4013 		goto err_dfs_exit;
4014 
4015 	b43legacy_print_driverinfo();
4016 
4017 	return err;
4018 
4019 err_dfs_exit:
4020 	b43legacy_debugfs_exit();
4021 	return err;
4022 }
4023 
b43legacy_exit(void)4024 static void __exit b43legacy_exit(void)
4025 {
4026 	ssb_driver_unregister(&b43legacy_ssb_driver);
4027 	b43legacy_debugfs_exit();
4028 }
4029 
4030 module_init(b43legacy_init)
4031 module_exit(b43legacy_exit)
4032