1 /*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <linux/types.h>
18 #include <net/cfg80211.h>
19 #include <net/mac80211.h>
20 #include <net/regulatory.h>
21
22 #include <defs.h>
23 #include "pub.h"
24 #include "phy/phy_hal.h"
25 #include "main.h"
26 #include "stf.h"
27 #include "channel.h"
28 #include "mac80211_if.h"
29 #include "debug.h"
30
31 /* QDB() macro takes a dB value and converts to a quarter dB value */
32 #define QDB(n) ((n) * BRCMS_TXPWR_DB_FACTOR)
33
34 #define LOCALE_MIMO_IDX_bn 0
35 #define LOCALE_MIMO_IDX_11n 0
36
37 /* max of BAND_5G_PWR_LVLS and 14 for 2.4 GHz */
38 #define BRCMS_MAXPWR_MIMO_TBL_SIZE 14
39
40 /* maxpwr mapping to 5GHz band channels:
41 * maxpwr[0] - channels [34-48]
42 * maxpwr[1] - channels [52-60]
43 * maxpwr[2] - channels [62-64]
44 * maxpwr[3] - channels [100-140]
45 * maxpwr[4] - channels [149-165]
46 */
47 #define BAND_5G_PWR_LVLS 5 /* 5 power levels for 5G */
48
49 #define LC(id) LOCALE_MIMO_IDX_ ## id
50
51 #define LOCALES(mimo2, mimo5) \
52 {LC(mimo2), LC(mimo5)}
53
54 /* macro to get 5 GHz channel group index for tx power */
55 #define CHANNEL_POWER_IDX_5G(c) (((c) < 52) ? 0 : \
56 (((c) < 62) ? 1 : \
57 (((c) < 100) ? 2 : \
58 (((c) < 149) ? 3 : 4))))
59
60 #define BRCM_2GHZ_2412_2462 REG_RULE(2412-10, 2462+10, 40, 0, 19, 0)
61 #define BRCM_2GHZ_2467_2472 REG_RULE(2467-10, 2472+10, 20, 0, 19, \
62 NL80211_RRF_NO_IR)
63
64 #define BRCM_5GHZ_5180_5240 REG_RULE(5180-10, 5240+10, 40, 0, 21, \
65 NL80211_RRF_NO_IR)
66 #define BRCM_5GHZ_5260_5320 REG_RULE(5260-10, 5320+10, 40, 0, 21, \
67 NL80211_RRF_DFS | \
68 NL80211_RRF_NO_IR)
69 #define BRCM_5GHZ_5500_5700 REG_RULE(5500-10, 5700+10, 40, 0, 21, \
70 NL80211_RRF_DFS | \
71 NL80211_RRF_NO_IR)
72 #define BRCM_5GHZ_5745_5825 REG_RULE(5745-10, 5825+10, 40, 0, 21, \
73 NL80211_RRF_NO_IR)
74
75 static const struct ieee80211_regdomain brcms_regdom_x2 = {
76 .n_reg_rules = 6,
77 .alpha2 = "X2",
78 .reg_rules = {
79 BRCM_2GHZ_2412_2462,
80 BRCM_2GHZ_2467_2472,
81 BRCM_5GHZ_5180_5240,
82 BRCM_5GHZ_5260_5320,
83 BRCM_5GHZ_5500_5700,
84 BRCM_5GHZ_5745_5825,
85 }
86 };
87
88 /* locale per-channel tx power limits for MIMO frames
89 * maxpwr arrays are index by channel for 2.4 GHz limits, and
90 * by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel)
91 */
92 struct locale_mimo_info {
93 /* tx 20 MHz power limits, qdBm units */
94 s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE];
95 /* tx 40 MHz power limits, qdBm units */
96 s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE];
97 };
98
99 /* Country names and abbreviations with locale defined from ISO 3166 */
100 struct country_info {
101 const u8 locale_mimo_2G; /* 2.4G mimo info */
102 const u8 locale_mimo_5G; /* 5G mimo info */
103 };
104
105 struct brcms_regd {
106 struct country_info country;
107 const struct ieee80211_regdomain *regdomain;
108 };
109
110 struct brcms_cm_info {
111 struct brcms_pub *pub;
112 struct brcms_c_info *wlc;
113 const struct brcms_regd *world_regd;
114 };
115
116 /*
117 * MIMO Locale Definitions - 2.4 GHz
118 */
119 static const struct locale_mimo_info locale_bn = {
120 {QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
121 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
122 QDB(13), QDB(13), QDB(13)},
123 {0, 0, QDB(13), QDB(13), QDB(13),
124 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
125 QDB(13), 0, 0},
126 };
127
128 static const struct locale_mimo_info *g_mimo_2g_table[] = {
129 &locale_bn
130 };
131
132 /*
133 * MIMO Locale Definitions - 5 GHz
134 */
135 static const struct locale_mimo_info locale_11n = {
136 { /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)},
137 {QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)},
138 };
139
140 static const struct locale_mimo_info *g_mimo_5g_table[] = {
141 &locale_11n
142 };
143
144 static const struct brcms_regd cntry_locales[] = {
145 /* Worldwide RoW 2, must always be at index 0 */
146 {
147 .country = LOCALES(bn, 11n),
148 .regdomain = &brcms_regdom_x2,
149 },
150 };
151
brcms_c_get_mimo_2g(u8 locale_idx)152 static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx)
153 {
154 if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table))
155 return NULL;
156
157 return g_mimo_2g_table[locale_idx];
158 }
159
brcms_c_get_mimo_5g(u8 locale_idx)160 static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx)
161 {
162 if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table))
163 return NULL;
164
165 return g_mimo_5g_table[locale_idx];
166 }
167
168 /*
169 * Indicates whether the country provided is valid to pass
170 * to cfg80211 or not.
171 *
172 * returns true if valid; false if not.
173 */
brcms_c_country_valid(const char * ccode)174 static bool brcms_c_country_valid(const char *ccode)
175 {
176 /*
177 * only allow ascii alpha uppercase for the first 2
178 * chars.
179 */
180 if (!((ccode[0] & 0x80) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A &&
181 (ccode[1] & 0x80) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A))
182 return false;
183
184 /*
185 * do not match ISO 3166-1 user assigned country codes
186 * that may be in the driver table
187 */
188 if (!strcmp("AA", ccode) || /* AA */
189 !strcmp("ZZ", ccode) || /* ZZ */
190 ccode[0] == 'X' || /* XA - XZ */
191 (ccode[0] == 'Q' && /* QM - QZ */
192 (ccode[1] >= 'M' && ccode[1] <= 'Z')))
193 return false;
194
195 if (!strcmp("NA", ccode))
196 return false;
197
198 return true;
199 }
200
brcms_world_regd(const char * regdom,int len)201 static const struct brcms_regd *brcms_world_regd(const char *regdom, int len)
202 {
203 const struct brcms_regd *regd = NULL;
204 int i;
205
206 for (i = 0; i < ARRAY_SIZE(cntry_locales); i++) {
207 if (!strncmp(regdom, cntry_locales[i].regdomain->alpha2, len)) {
208 regd = &cntry_locales[i];
209 break;
210 }
211 }
212
213 return regd;
214 }
215
brcms_default_world_regd(void)216 static const struct brcms_regd *brcms_default_world_regd(void)
217 {
218 return &cntry_locales[0];
219 }
220
221 /* JP, J1 - J10 are Japan ccodes */
brcms_c_japan_ccode(const char * ccode)222 static bool brcms_c_japan_ccode(const char *ccode)
223 {
224 return (ccode[0] == 'J' &&
225 (ccode[1] == 'P' || (ccode[1] >= '1' && ccode[1] <= '9')));
226 }
227
228 static void
brcms_c_channel_min_txpower_limits_with_local_constraint(struct brcms_cm_info * wlc_cm,struct txpwr_limits * txpwr,u8 local_constraint_qdbm)229 brcms_c_channel_min_txpower_limits_with_local_constraint(
230 struct brcms_cm_info *wlc_cm, struct txpwr_limits *txpwr,
231 u8 local_constraint_qdbm)
232 {
233 int j;
234
235 /* CCK Rates */
236 for (j = 0; j < WL_TX_POWER_CCK_NUM; j++)
237 txpwr->cck[j] = min(txpwr->cck[j], local_constraint_qdbm);
238
239 /* 20 MHz Legacy OFDM SISO */
240 for (j = 0; j < WL_TX_POWER_OFDM_NUM; j++)
241 txpwr->ofdm[j] = min(txpwr->ofdm[j], local_constraint_qdbm);
242
243 /* 20 MHz Legacy OFDM CDD */
244 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
245 txpwr->ofdm_cdd[j] =
246 min(txpwr->ofdm_cdd[j], local_constraint_qdbm);
247
248 /* 40 MHz Legacy OFDM SISO */
249 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
250 txpwr->ofdm_40_siso[j] =
251 min(txpwr->ofdm_40_siso[j], local_constraint_qdbm);
252
253 /* 40 MHz Legacy OFDM CDD */
254 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
255 txpwr->ofdm_40_cdd[j] =
256 min(txpwr->ofdm_40_cdd[j], local_constraint_qdbm);
257
258 /* 20MHz MCS 0-7 SISO */
259 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
260 txpwr->mcs_20_siso[j] =
261 min(txpwr->mcs_20_siso[j], local_constraint_qdbm);
262
263 /* 20MHz MCS 0-7 CDD */
264 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
265 txpwr->mcs_20_cdd[j] =
266 min(txpwr->mcs_20_cdd[j], local_constraint_qdbm);
267
268 /* 20MHz MCS 0-7 STBC */
269 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
270 txpwr->mcs_20_stbc[j] =
271 min(txpwr->mcs_20_stbc[j], local_constraint_qdbm);
272
273 /* 20MHz MCS 8-15 MIMO */
274 for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
275 txpwr->mcs_20_mimo[j] =
276 min(txpwr->mcs_20_mimo[j], local_constraint_qdbm);
277
278 /* 40MHz MCS 0-7 SISO */
279 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
280 txpwr->mcs_40_siso[j] =
281 min(txpwr->mcs_40_siso[j], local_constraint_qdbm);
282
283 /* 40MHz MCS 0-7 CDD */
284 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
285 txpwr->mcs_40_cdd[j] =
286 min(txpwr->mcs_40_cdd[j], local_constraint_qdbm);
287
288 /* 40MHz MCS 0-7 STBC */
289 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
290 txpwr->mcs_40_stbc[j] =
291 min(txpwr->mcs_40_stbc[j], local_constraint_qdbm);
292
293 /* 40MHz MCS 8-15 MIMO */
294 for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
295 txpwr->mcs_40_mimo[j] =
296 min(txpwr->mcs_40_mimo[j], local_constraint_qdbm);
297
298 /* 40MHz MCS 32 */
299 txpwr->mcs32 = min(txpwr->mcs32, local_constraint_qdbm);
300
301 }
302
303 /*
304 * set the driver's current country and regulatory information
305 * using a country code as the source. Look up built in country
306 * information found with the country code.
307 */
308 static void
brcms_c_set_country(struct brcms_cm_info * wlc_cm,const struct brcms_regd * regd)309 brcms_c_set_country(struct brcms_cm_info *wlc_cm,
310 const struct brcms_regd *regd)
311 {
312 struct brcms_c_info *wlc = wlc_cm->wlc;
313
314 if ((wlc->pub->_n_enab & SUPPORT_11N) !=
315 wlc->protection->nmode_user)
316 brcms_c_set_nmode(wlc);
317
318 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
319 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
320
321 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);
322
323 return;
324 }
325
brcms_c_channel_mgr_attach(struct brcms_c_info * wlc)326 struct brcms_cm_info *brcms_c_channel_mgr_attach(struct brcms_c_info *wlc)
327 {
328 struct brcms_cm_info *wlc_cm;
329 struct brcms_pub *pub = wlc->pub;
330 struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
331 const char *ccode = sprom->alpha2;
332 int ccode_len = sizeof(sprom->alpha2);
333
334 wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC);
335 if (wlc_cm == NULL)
336 return NULL;
337 wlc_cm->pub = pub;
338 wlc_cm->wlc = wlc;
339 wlc->cmi = wlc_cm;
340
341 /* store the country code for passing up as a regulatory hint */
342 wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len);
343 if (brcms_c_country_valid(ccode))
344 strncpy(wlc->pub->srom_ccode, ccode, ccode_len);
345
346 /*
347 * If no custom world domain is found in the SROM, use the
348 * default "X2" domain.
349 */
350 if (!wlc_cm->world_regd) {
351 wlc_cm->world_regd = brcms_default_world_regd();
352 ccode = wlc_cm->world_regd->regdomain->alpha2;
353 ccode_len = BRCM_CNTRY_BUF_SZ - 1;
354 }
355
356 /* save default country for exiting 11d regulatory mode */
357 strncpy(wlc->country_default, ccode, ccode_len);
358
359 /* initialize autocountry_default to driver default */
360 strncpy(wlc->autocountry_default, ccode, ccode_len);
361
362 brcms_c_set_country(wlc_cm, wlc_cm->world_regd);
363
364 return wlc_cm;
365 }
366
brcms_c_channel_mgr_detach(struct brcms_cm_info * wlc_cm)367 void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm)
368 {
369 kfree(wlc_cm);
370 }
371
372 void
brcms_c_channel_set_chanspec(struct brcms_cm_info * wlc_cm,u16 chanspec,u8 local_constraint_qdbm)373 brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
374 u8 local_constraint_qdbm)
375 {
376 struct brcms_c_info *wlc = wlc_cm->wlc;
377 struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan;
378 struct txpwr_limits txpwr;
379
380 brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);
381
382 brcms_c_channel_min_txpower_limits_with_local_constraint(
383 wlc_cm, &txpwr, local_constraint_qdbm
384 );
385
386 /* set or restore gmode as required by regulatory */
387 if (ch->flags & IEEE80211_CHAN_NO_OFDM)
388 brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
389 else
390 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);
391
392 brcms_b_set_chanspec(wlc->hw, chanspec,
393 !!(ch->flags & IEEE80211_CHAN_NO_IR),
394 &txpwr);
395 }
396
397 void
brcms_c_channel_reg_limits(struct brcms_cm_info * wlc_cm,u16 chanspec,struct txpwr_limits * txpwr)398 brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
399 struct txpwr_limits *txpwr)
400 {
401 struct brcms_c_info *wlc = wlc_cm->wlc;
402 struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan;
403 uint i;
404 uint chan;
405 int maxpwr;
406 int delta;
407 const struct country_info *country;
408 struct brcms_band *band;
409 int conducted_max = BRCMS_TXPWR_MAX;
410 const struct locale_mimo_info *li_mimo;
411 int maxpwr20, maxpwr40;
412 int maxpwr_idx;
413 uint j;
414
415 memset(txpwr, 0, sizeof(struct txpwr_limits));
416
417 if (WARN_ON(!ch))
418 return;
419
420 country = &wlc_cm->world_regd->country;
421
422 chan = CHSPEC_CHANNEL(chanspec);
423 band = wlc->bandstate[chspec_bandunit(chanspec)];
424 li_mimo = (band->bandtype == BRCM_BAND_5G) ?
425 brcms_c_get_mimo_5g(country->locale_mimo_5G) :
426 brcms_c_get_mimo_2g(country->locale_mimo_2G);
427
428 delta = band->antgain;
429
430 if (band->bandtype == BRCM_BAND_2G)
431 conducted_max = QDB(22);
432
433 maxpwr = QDB(ch->max_power) - delta;
434 maxpwr = max(maxpwr, 0);
435 maxpwr = min(maxpwr, conducted_max);
436
437 /* CCK txpwr limits for 2.4G band */
438 if (band->bandtype == BRCM_BAND_2G) {
439 for (i = 0; i < BRCMS_NUM_RATES_CCK; i++)
440 txpwr->cck[i] = (u8) maxpwr;
441 }
442
443 for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) {
444 txpwr->ofdm[i] = (u8) maxpwr;
445
446 /*
447 * OFDM 40 MHz SISO has the same power as the corresponding
448 * MCS0-7 rate unless overriden by the locale specific code.
449 * We set this value to 0 as a flag (presumably 0 dBm isn't
450 * a possibility) and then copy the MCS0-7 value to the 40 MHz
451 * value if it wasn't explicitly set.
452 */
453 txpwr->ofdm_40_siso[i] = 0;
454
455 txpwr->ofdm_cdd[i] = (u8) maxpwr;
456
457 txpwr->ofdm_40_cdd[i] = 0;
458 }
459
460 delta = 0;
461 if (band->antgain > QDB(6))
462 delta = band->antgain - QDB(6); /* Excess over 6 dB */
463
464 if (band->bandtype == BRCM_BAND_2G)
465 maxpwr_idx = (chan - 1);
466 else
467 maxpwr_idx = CHANNEL_POWER_IDX_5G(chan);
468
469 maxpwr20 = li_mimo->maxpwr20[maxpwr_idx];
470 maxpwr40 = li_mimo->maxpwr40[maxpwr_idx];
471
472 maxpwr20 = maxpwr20 - delta;
473 maxpwr20 = max(maxpwr20, 0);
474 maxpwr40 = maxpwr40 - delta;
475 maxpwr40 = max(maxpwr40, 0);
476
477 /* Fill in the MCS 0-7 (SISO) rates */
478 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
479
480 /*
481 * 20 MHz has the same power as the corresponding OFDM rate
482 * unless overriden by the locale specific code.
483 */
484 txpwr->mcs_20_siso[i] = txpwr->ofdm[i];
485 txpwr->mcs_40_siso[i] = 0;
486 }
487
488 /* Fill in the MCS 0-7 CDD rates */
489 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
490 txpwr->mcs_20_cdd[i] = (u8) maxpwr20;
491 txpwr->mcs_40_cdd[i] = (u8) maxpwr40;
492 }
493
494 /*
495 * These locales have SISO expressed in the
496 * table and override CDD later
497 */
498 if (li_mimo == &locale_bn) {
499 maxpwr20 = QDB(16);
500 maxpwr40 = 0;
501
502 if (chan >= 3 && chan <= 11)
503 maxpwr40 = QDB(16);
504
505 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
506 txpwr->mcs_20_siso[i] = (u8) maxpwr20;
507 txpwr->mcs_40_siso[i] = (u8) maxpwr40;
508 }
509 }
510
511 /* Fill in the MCS 0-7 STBC rates */
512 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
513 txpwr->mcs_20_stbc[i] = 0;
514 txpwr->mcs_40_stbc[i] = 0;
515 }
516
517 /* Fill in the MCS 8-15 SDM rates */
518 for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
519 txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
520 txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
521 }
522
523 /* Fill in MCS32 */
524 txpwr->mcs32 = (u8) maxpwr40;
525
526 for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
527 if (txpwr->ofdm_40_cdd[i] == 0)
528 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
529 if (i == 0) {
530 i = i + 1;
531 if (txpwr->ofdm_40_cdd[i] == 0)
532 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
533 }
534 }
535
536 /*
537 * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
538 * value if it wasn't provided explicitly.
539 */
540 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
541 if (txpwr->mcs_40_siso[i] == 0)
542 txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
543 }
544
545 for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
546 if (txpwr->ofdm_40_siso[i] == 0)
547 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
548 if (i == 0) {
549 i = i + 1;
550 if (txpwr->ofdm_40_siso[i] == 0)
551 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
552 }
553 }
554
555 /*
556 * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
557 * STBC values if they weren't provided explicitly.
558 */
559 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
560 if (txpwr->mcs_20_stbc[i] == 0)
561 txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];
562
563 if (txpwr->mcs_40_stbc[i] == 0)
564 txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
565 }
566
567 return;
568 }
569
570 /*
571 * Verify the chanspec is using a legal set of parameters, i.e. that the
572 * chanspec specified a band, bw, ctl_sb and channel and that the
573 * combination could be legal given any set of circumstances.
574 * RETURNS: true is the chanspec is malformed, false if it looks good.
575 */
brcms_c_chspec_malformed(u16 chanspec)576 static bool brcms_c_chspec_malformed(u16 chanspec)
577 {
578 /* must be 2G or 5G band */
579 if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
580 return true;
581 /* must be 20 or 40 bandwidth */
582 if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
583 return true;
584
585 /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
586 if (CHSPEC_IS20(chanspec)) {
587 if (!CHSPEC_SB_NONE(chanspec))
588 return true;
589 } else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
590 return true;
591 }
592
593 return false;
594 }
595
596 /*
597 * Validate the chanspec for this locale, for 40MHZ we need to also
598 * check that the sidebands are valid 20MZH channels in this locale
599 * and they are also a legal HT combination
600 */
601 static bool
brcms_c_valid_chanspec_ext(struct brcms_cm_info * wlc_cm,u16 chspec)602 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
603 {
604 struct brcms_c_info *wlc = wlc_cm->wlc;
605 u8 channel = CHSPEC_CHANNEL(chspec);
606
607 /* check the chanspec */
608 if (brcms_c_chspec_malformed(chspec)) {
609 brcms_err(wlc->hw->d11core, "wl%d: malformed chanspec 0x%x\n",
610 wlc->pub->unit, chspec);
611 return false;
612 }
613
614 if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
615 chspec_bandunit(chspec))
616 return false;
617
618 return true;
619 }
620
brcms_c_valid_chanspec_db(struct brcms_cm_info * wlc_cm,u16 chspec)621 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
622 {
623 return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
624 }
625
brcms_is_radar_freq(u16 center_freq)626 static bool brcms_is_radar_freq(u16 center_freq)
627 {
628 return center_freq >= 5260 && center_freq <= 5700;
629 }
630
brcms_reg_apply_radar_flags(struct wiphy * wiphy)631 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
632 {
633 struct ieee80211_supported_band *sband;
634 struct ieee80211_channel *ch;
635 int i;
636
637 sband = wiphy->bands[NL80211_BAND_5GHZ];
638 if (!sband)
639 return;
640
641 for (i = 0; i < sband->n_channels; i++) {
642 ch = &sband->channels[i];
643
644 if (!brcms_is_radar_freq(ch->center_freq))
645 continue;
646
647 /*
648 * All channels in this range should be passive and have
649 * DFS enabled.
650 */
651 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
652 ch->flags |= IEEE80211_CHAN_RADAR |
653 IEEE80211_CHAN_NO_IR;
654 }
655 }
656
657 static void
brcms_reg_apply_beaconing_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator)658 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
659 enum nl80211_reg_initiator initiator)
660 {
661 struct ieee80211_supported_band *sband;
662 struct ieee80211_channel *ch;
663 const struct ieee80211_reg_rule *rule;
664 int band, i;
665
666 for (band = 0; band < NUM_NL80211_BANDS; band++) {
667 sband = wiphy->bands[band];
668 if (!sband)
669 continue;
670
671 for (i = 0; i < sband->n_channels; i++) {
672 ch = &sband->channels[i];
673
674 if (ch->flags &
675 (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR))
676 continue;
677
678 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
679 rule = freq_reg_info(wiphy,
680 MHZ_TO_KHZ(ch->center_freq));
681 if (IS_ERR(rule))
682 continue;
683
684 if (!(rule->flags & NL80211_RRF_NO_IR))
685 ch->flags &= ~IEEE80211_CHAN_NO_IR;
686 } else if (ch->beacon_found) {
687 ch->flags &= ~IEEE80211_CHAN_NO_IR;
688 }
689 }
690 }
691 }
692
brcms_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)693 static void brcms_reg_notifier(struct wiphy *wiphy,
694 struct regulatory_request *request)
695 {
696 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
697 struct brcms_info *wl = hw->priv;
698 struct brcms_c_info *wlc = wl->wlc;
699 struct ieee80211_supported_band *sband;
700 struct ieee80211_channel *ch;
701 int band, i;
702 bool ch_found = false;
703
704 brcms_reg_apply_radar_flags(wiphy);
705
706 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
707 brcms_reg_apply_beaconing_flags(wiphy, request->initiator);
708
709 /* Disable radio if all channels disallowed by regulatory */
710 for (band = 0; !ch_found && band < NUM_NL80211_BANDS; band++) {
711 sband = wiphy->bands[band];
712 if (!sband)
713 continue;
714
715 for (i = 0; !ch_found && i < sband->n_channels; i++) {
716 ch = &sband->channels[i];
717
718 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
719 ch_found = true;
720 }
721 }
722
723 if (ch_found) {
724 mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
725 } else {
726 mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
727 brcms_err(wlc->hw->d11core,
728 "wl%d: %s: no valid channel for \"%s\"\n",
729 wlc->pub->unit, __func__, request->alpha2);
730 }
731
732 if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G)
733 wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
734 brcms_c_japan_ccode(request->alpha2));
735 }
736
brcms_c_regd_init(struct brcms_c_info * wlc)737 void brcms_c_regd_init(struct brcms_c_info *wlc)
738 {
739 struct wiphy *wiphy = wlc->wiphy;
740 const struct brcms_regd *regd = wlc->cmi->world_regd;
741 struct ieee80211_supported_band *sband;
742 struct ieee80211_channel *ch;
743 struct brcms_chanvec sup_chan;
744 struct brcms_band *band;
745 int band_idx, i;
746
747 /* Disable any channels not supported by the phy */
748 for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
749 band = wlc->bandstate[band_idx];
750
751 wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
752 &sup_chan);
753
754 if (band_idx == BAND_2G_INDEX)
755 sband = wiphy->bands[NL80211_BAND_2GHZ];
756 else
757 sband = wiphy->bands[NL80211_BAND_5GHZ];
758
759 for (i = 0; i < sband->n_channels; i++) {
760 ch = &sband->channels[i];
761 if (!isset(sup_chan.vec, ch->hw_value))
762 ch->flags |= IEEE80211_CHAN_DISABLED;
763 }
764 }
765
766 wlc->wiphy->reg_notifier = brcms_reg_notifier;
767 wlc->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
768 REGULATORY_STRICT_REG;
769 wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
770 brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
771 }
772