tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/******************************************************************************
2 *
3 * Copyright(c) 2009-2010 Realtek Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * The full GNU General Public License is included in this distribution in the
15 * file called LICENSE.
16 *
17 * Contact Information:
18 * wlanfae <wlanfae@realtek.com>
19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20 * Hsinchu 300, Taiwan.
21 *
22 * Larry Finger <Larry.Finger@lwfinger.net>
23 *
24 *****************************************************************************/
25
26#include "wifi.h"
27#include "regd.h"
28
29static struct country_code_to_enum_rd allcountries[] = {
30 {COUNTRY_CODE_FCC, "US"},
31 {COUNTRY_CODE_IC, "US"},
32 {COUNTRY_CODE_ETSI, "EC"},
33 {COUNTRY_CODE_SPAIN, "EC"},
34 {COUNTRY_CODE_FRANCE, "EC"},
35 {COUNTRY_CODE_MKK, "JP"},
36 {COUNTRY_CODE_MKK1, "JP"},
37 {COUNTRY_CODE_ISRAEL, "EC"},
38 {COUNTRY_CODE_TELEC, "JP"},
39 {COUNTRY_CODE_MIC, "JP"},
40 {COUNTRY_CODE_GLOBAL_DOMAIN, "JP"},
41 {COUNTRY_CODE_WORLD_WIDE_13, "EC"},
42 {COUNTRY_CODE_TELEC_NETGEAR, "EC"},
43};
44
45/*
46 *Only these channels all allow active
47 *scan on all world regulatory domains
48 */
49#define RTL819x_2GHZ_CH01_11 \
50 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
51
52/*
53 *We enable active scan on these a case
54 *by case basis by regulatory domain
55 */
56#define RTL819x_2GHZ_CH12_13 \
57 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
58 NL80211_RRF_PASSIVE_SCAN)
59
60#define RTL819x_2GHZ_CH14 \
61 REG_RULE(2484-10, 2484+10, 40, 0, 20, \
62 NL80211_RRF_PASSIVE_SCAN | \
63 NL80211_RRF_NO_OFDM)
64
65/* 5G chan 36 - chan 64*/
66#define RTL819x_5GHZ_5150_5350 \
67 REG_RULE(5150-10, 5350+10, 80, 0, 30, \
68 NL80211_RRF_PASSIVE_SCAN | \
69 NL80211_RRF_NO_IBSS)
70
71/* 5G chan 100 - chan 165*/
72#define RTL819x_5GHZ_5470_5850 \
73 REG_RULE(5470-10, 5850+10, 80, 0, 30, \
74 NL80211_RRF_PASSIVE_SCAN | \
75 NL80211_RRF_NO_IBSS)
76
77/* 5G chan 149 - chan 165*/
78#define RTL819x_5GHZ_5725_5850 \
79 REG_RULE(5725-10, 5850+10, 80, 0, 30, \
80 NL80211_RRF_PASSIVE_SCAN | \
81 NL80211_RRF_NO_IBSS)
82
83#define RTL819x_5GHZ_ALL \
84 (RTL819x_5GHZ_5150_5350, RTL819x_5GHZ_5470_5850)
85
86static const struct ieee80211_regdomain rtl_regdom_11 = {
87 .n_reg_rules = 1,
88 .alpha2 = "99",
89 .reg_rules = {
90 RTL819x_2GHZ_CH01_11,
91 }
92};
93
94static const struct ieee80211_regdomain rtl_regdom_12_13 = {
95 .n_reg_rules = 2,
96 .alpha2 = "99",
97 .reg_rules = {
98 RTL819x_2GHZ_CH01_11,
99 RTL819x_2GHZ_CH12_13,
100 }
101};
102
103static const struct ieee80211_regdomain rtl_regdom_no_midband = {
104 .n_reg_rules = 3,
105 .alpha2 = "99",
106 .reg_rules = {
107 RTL819x_2GHZ_CH01_11,
108 RTL819x_5GHZ_5150_5350,
109 RTL819x_5GHZ_5725_5850,
110 }
111};
112
113static const struct ieee80211_regdomain rtl_regdom_60_64 = {
114 .n_reg_rules = 3,
115 .alpha2 = "99",
116 .reg_rules = {
117 RTL819x_2GHZ_CH01_11,
118 RTL819x_2GHZ_CH12_13,
119 RTL819x_5GHZ_5725_5850,
120 }
121};
122
123static const struct ieee80211_regdomain rtl_regdom_14_60_64 = {
124 .n_reg_rules = 4,
125 .alpha2 = "99",
126 .reg_rules = {
127 RTL819x_2GHZ_CH01_11,
128 RTL819x_2GHZ_CH12_13,
129 RTL819x_2GHZ_CH14,
130 RTL819x_5GHZ_5725_5850,
131 }
132};
133
134static const struct ieee80211_regdomain rtl_regdom_14 = {
135 .n_reg_rules = 3,
136 .alpha2 = "99",
137 .reg_rules = {
138 RTL819x_2GHZ_CH01_11,
139 RTL819x_2GHZ_CH12_13,
140 RTL819x_2GHZ_CH14,
141 }
142};
143
144static bool _rtl_is_radar_freq(u16 center_freq)
145{
146 return center_freq >= 5260 && center_freq <= 5700;
147}
148
149static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy,
150 enum nl80211_reg_initiator initiator)
151{
152 enum ieee80211_band band;
153 struct ieee80211_supported_band *sband;
154 const struct ieee80211_reg_rule *reg_rule;
155 struct ieee80211_channel *ch;
156 unsigned int i;
157
158 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
159 if (!wiphy->bands[band])
160 continue;
161
162 sband = wiphy->bands[band];
163
164 for (i = 0; i < sband->n_channels; i++) {
165 ch = &sband->channels[i];
166 if (_rtl_is_radar_freq(ch->center_freq) ||
167 (ch->flags & IEEE80211_CHAN_RADAR))
168 continue;
169 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
170 reg_rule = freq_reg_info(wiphy,
171 ch->center_freq);
172 if (IS_ERR(reg_rule))
173 continue;
174
175 /*
176 *If 11d had a rule for this channel ensure
177 *we enable adhoc/beaconing if it allows us to
178 *use it. Note that we would have disabled it
179 *by applying our static world regdomain by
180 *default during init, prior to calling our
181 *regulatory_hint().
182 */
183
184 if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
185 ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
186 if (!(reg_rule->flags &
187 NL80211_RRF_PASSIVE_SCAN))
188 ch->flags &=
189 ~IEEE80211_CHAN_PASSIVE_SCAN;
190 } else {
191 if (ch->beacon_found)
192 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
193 IEEE80211_CHAN_PASSIVE_SCAN);
194 }
195 }
196 }
197}
198
199/* Allows active scan scan on Ch 12 and 13 */
200static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy,
201 enum nl80211_reg_initiator
202 initiator)
203{
204 struct ieee80211_supported_band *sband;
205 struct ieee80211_channel *ch;
206 const struct ieee80211_reg_rule *reg_rule;
207
208 if (!wiphy->bands[IEEE80211_BAND_2GHZ])
209 return;
210 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
211
212 /*
213 *If no country IE has been received always enable active scan
214 *on these channels. This is only done for specific regulatory SKUs
215 */
216 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
217 ch = &sband->channels[11]; /* CH 12 */
218 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
219 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
220 ch = &sband->channels[12]; /* CH 13 */
221 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
222 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
223 return;
224 }
225
226 /*
227 *If a country IE has been recieved check its rule for this
228 *channel first before enabling active scan. The passive scan
229 *would have been enforced by the initial processing of our
230 *custom regulatory domain.
231 */
232
233 ch = &sband->channels[11]; /* CH 12 */
234 reg_rule = freq_reg_info(wiphy, ch->center_freq);
235 if (!IS_ERR(reg_rule)) {
236 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
237 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
238 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
239 }
240
241 ch = &sband->channels[12]; /* CH 13 */
242 reg_rule = freq_reg_info(wiphy, ch->center_freq);
243 if (!IS_ERR(reg_rule)) {
244 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
245 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
246 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
247 }
248}
249
250/*
251 *Always apply Radar/DFS rules on
252 *freq range 5260 MHz - 5700 MHz
253 */
254static void _rtl_reg_apply_radar_flags(struct wiphy *wiphy)
255{
256 struct ieee80211_supported_band *sband;
257 struct ieee80211_channel *ch;
258 unsigned int i;
259
260 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
261 return;
262
263 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
264
265 for (i = 0; i < sband->n_channels; i++) {
266 ch = &sband->channels[i];
267 if (!_rtl_is_radar_freq(ch->center_freq))
268 continue;
269
270 /*
271 *We always enable radar detection/DFS on this
272 *frequency range. Additionally we also apply on
273 *this frequency range:
274 *- If STA mode does not yet have DFS supports disable
275 * active scanning
276 *- If adhoc mode does not support DFS yet then disable
277 * adhoc in the frequency.
278 *- If AP mode does not yet support radar detection/DFS
279 *do not allow AP mode
280 */
281 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
282 ch->flags |= IEEE80211_CHAN_RADAR |
283 IEEE80211_CHAN_NO_IBSS |
284 IEEE80211_CHAN_PASSIVE_SCAN;
285 }
286}
287
288static void _rtl_reg_apply_world_flags(struct wiphy *wiphy,
289 enum nl80211_reg_initiator initiator,
290 struct rtl_regulatory *reg)
291{
292 _rtl_reg_apply_beaconing_flags(wiphy, initiator);
293 _rtl_reg_apply_active_scan_flags(wiphy, initiator);
294 return;
295}
296
297static void _rtl_dump_channel_map(struct wiphy *wiphy)
298{
299 enum ieee80211_band band;
300 struct ieee80211_supported_band *sband;
301 struct ieee80211_channel *ch;
302 unsigned int i;
303
304 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
305 if (!wiphy->bands[band])
306 continue;
307 sband = wiphy->bands[band];
308 for (i = 0; i < sband->n_channels; i++)
309 ch = &sband->channels[i];
310 }
311}
312
313static int _rtl92e_reg_notifier_apply(struct wiphy *wiphy,
314 struct regulatory_request *request,
315 struct rtl_regulatory *reg)
316{
317 /* We always apply this */
318 _rtl_reg_apply_radar_flags(wiphy);
319
320 switch (request->initiator) {
321 case NL80211_REGDOM_SET_BY_DRIVER:
322 case NL80211_REGDOM_SET_BY_CORE:
323 case NL80211_REGDOM_SET_BY_USER:
324 break;
325 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
326 _rtl_reg_apply_world_flags(wiphy, request->initiator, reg);
327 break;
328 }
329
330 _rtl_dump_channel_map(wiphy);
331
332 return 0;
333}
334
335static const struct ieee80211_regdomain *_rtl_regdomain_select(
336 struct rtl_regulatory *reg)
337{
338 switch (reg->country_code) {
339 case COUNTRY_CODE_FCC:
340 return &rtl_regdom_no_midband;
341 case COUNTRY_CODE_IC:
342 return &rtl_regdom_11;
343 case COUNTRY_CODE_ETSI:
344 case COUNTRY_CODE_TELEC_NETGEAR:
345 return &rtl_regdom_60_64;
346 case COUNTRY_CODE_SPAIN:
347 case COUNTRY_CODE_FRANCE:
348 case COUNTRY_CODE_ISRAEL:
349 case COUNTRY_CODE_WORLD_WIDE_13:
350 return &rtl_regdom_12_13;
351 case COUNTRY_CODE_MKK:
352 case COUNTRY_CODE_MKK1:
353 case COUNTRY_CODE_TELEC:
354 case COUNTRY_CODE_MIC:
355 return &rtl_regdom_14_60_64;
356 case COUNTRY_CODE_GLOBAL_DOMAIN:
357 return &rtl_regdom_14;
358 default:
359 return &rtl_regdom_no_midband;
360 }
361}
362
363static int _rtl92e_regd_init_wiphy(struct rtl_regulatory *reg,
364 struct wiphy *wiphy,
365 void (*reg_notifier)(struct wiphy *wiphy,
366 struct regulatory_request *
367 request))
368{
369 const struct ieee80211_regdomain *regd;
370
371 wiphy->reg_notifier = reg_notifier;
372
373 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
374 wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG;
375 wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS;
376
377 regd = _rtl_regdomain_select(reg);
378 wiphy_apply_custom_regulatory(wiphy, regd);
379 _rtl_reg_apply_radar_flags(wiphy);
380 _rtl_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
381 return 0;
382}
383
384static struct country_code_to_enum_rd *_rtl_regd_find_country(u16 countrycode)
385{
386 int i;
387
388 for (i = 0; i < ARRAY_SIZE(allcountries); i++) {
389 if (allcountries[i].countrycode == countrycode)
390 return &allcountries[i];
391 }
392 return NULL;
393}
394
395int rtl92e_regd_init(struct ieee80211_hw *hw,
396 void (*reg_notifier)(struct wiphy *wiphy,
397 struct regulatory_request *request))
398{
399 struct rtl_priv *rtlpriv = rtl_priv(hw);
400 struct wiphy *wiphy = hw->wiphy;
401 struct country_code_to_enum_rd *country = NULL;
402
403 if (wiphy == NULL || &rtlpriv->regd == NULL)
404 return -EINVAL;
405
406 /* init country_code from efuse channel plan */
407 rtlpriv->regd.country_code = rtlpriv->efuse.channel_plan;
408
409 RT_TRACE(COMP_REGD, DBG_TRACE,
410 (KERN_DEBUG "rtl: EEPROM regdomain: 0x%0x\n",
411 rtlpriv->regd.country_code));
412
413 if (rtlpriv->regd.country_code >= COUNTRY_CODE_MAX) {
414 RT_TRACE(COMP_REGD, DBG_DMESG,
415 ("rtl: EEPROM indicates invalid contry code world wide 13 should be used\n"));
416
417 rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13;
418 }
419
420 country = _rtl_regd_find_country(rtlpriv->regd.country_code);
421
422 if (country) {
423 rtlpriv->regd.alpha2[0] = country->iso_name[0];
424 rtlpriv->regd.alpha2[1] = country->iso_name[1];
425 } else {
426 rtlpriv->regd.alpha2[0] = '0';
427 rtlpriv->regd.alpha2[1] = '0';
428 }
429
430 RT_TRACE(COMP_REGD, DBG_TRACE,
431 (KERN_DEBUG "rtl: Country alpha2 being used: %c%c\n",
432 rtlpriv->regd.alpha2[0], rtlpriv->regd.alpha2[1]));
433
434 _rtl92e_regd_init_wiphy(&rtlpriv->regd, wiphy, reg_notifier);
435
436 return 0;
437}
438
439void rtl92e_reg_notifier(struct wiphy *wiphy,
440 struct regulatory_request *request)
441{
442 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
443 struct rtl_priv *rtlpriv = rtl_priv(hw);
444
445 RT_TRACE(COMP_REGD, DBG_LOUD, ("\n"));
446
447 _rtl92e_reg_notifier_apply(wiphy, request, &rtlpriv->regd);
448}