1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2012 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 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30 #include "wifi.h"
31 #include "regd.h"
32
33 static struct country_code_to_enum_rd allCountries[] = {
34 {COUNTRY_CODE_FCC, "US"},
35 {COUNTRY_CODE_IC, "US"},
36 {COUNTRY_CODE_ETSI, "EC"},
37 {COUNTRY_CODE_SPAIN, "EC"},
38 {COUNTRY_CODE_FRANCE, "EC"},
39 {COUNTRY_CODE_MKK, "JP"},
40 {COUNTRY_CODE_MKK1, "JP"},
41 {COUNTRY_CODE_ISRAEL, "EC"},
42 {COUNTRY_CODE_TELEC, "JP"},
43 {COUNTRY_CODE_MIC, "JP"},
44 {COUNTRY_CODE_GLOBAL_DOMAIN, "JP"},
45 {COUNTRY_CODE_WORLD_WIDE_13, "EC"},
46 {COUNTRY_CODE_TELEC_NETGEAR, "EC"},
47 };
48
49 /*
50 *Only these channels all allow active
51 *scan on all world regulatory domains
52 */
53 #define RTL819x_2GHZ_CH01_11 \
54 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
55
56 /*
57 *We enable active scan on these a case
58 *by case basis by regulatory domain
59 */
60 #define RTL819x_2GHZ_CH12_13 \
61 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
62 NL80211_RRF_PASSIVE_SCAN)
63
64 #define RTL819x_2GHZ_CH14 \
65 REG_RULE(2484-10, 2484+10, 40, 0, 20, \
66 NL80211_RRF_PASSIVE_SCAN | \
67 NL80211_RRF_NO_OFDM)
68
69 /* 5G chan 36 - chan 64*/
70 #define RTL819x_5GHZ_5150_5350 \
71 REG_RULE(5150-10, 5350+10, 40, 0, 30, \
72 NL80211_RRF_PASSIVE_SCAN | \
73 NL80211_RRF_NO_IBSS)
74
75 /* 5G chan 100 - chan 165*/
76 #define RTL819x_5GHZ_5470_5850 \
77 REG_RULE(5470-10, 5850+10, 40, 0, 30, \
78 NL80211_RRF_PASSIVE_SCAN | \
79 NL80211_RRF_NO_IBSS)
80
81 /* 5G chan 149 - chan 165*/
82 #define RTL819x_5GHZ_5725_5850 \
83 REG_RULE(5725-10, 5850+10, 40, 0, 30, \
84 NL80211_RRF_PASSIVE_SCAN | \
85 NL80211_RRF_NO_IBSS)
86
87 #define RTL819x_5GHZ_ALL \
88 (RTL819x_5GHZ_5150_5350, RTL819x_5GHZ_5470_5850)
89
90 static const struct ieee80211_regdomain rtl_regdom_11 = {
91 .n_reg_rules = 1,
92 .alpha2 = "99",
93 .reg_rules = {
94 RTL819x_2GHZ_CH01_11,
95 }
96 };
97
98 static const struct ieee80211_regdomain rtl_regdom_12_13 = {
99 .n_reg_rules = 2,
100 .alpha2 = "99",
101 .reg_rules = {
102 RTL819x_2GHZ_CH01_11,
103 RTL819x_2GHZ_CH12_13,
104 }
105 };
106
107 static const struct ieee80211_regdomain rtl_regdom_no_midband = {
108 .n_reg_rules = 3,
109 .alpha2 = "99",
110 .reg_rules = {
111 RTL819x_2GHZ_CH01_11,
112 RTL819x_5GHZ_5150_5350,
113 RTL819x_5GHZ_5725_5850,
114 }
115 };
116
117 static const struct ieee80211_regdomain rtl_regdom_60_64 = {
118 .n_reg_rules = 3,
119 .alpha2 = "99",
120 .reg_rules = {
121 RTL819x_2GHZ_CH01_11,
122 RTL819x_2GHZ_CH12_13,
123 RTL819x_5GHZ_5725_5850,
124 }
125 };
126
127 static const struct ieee80211_regdomain rtl_regdom_14_60_64 = {
128 .n_reg_rules = 4,
129 .alpha2 = "99",
130 .reg_rules = {
131 RTL819x_2GHZ_CH01_11,
132 RTL819x_2GHZ_CH12_13,
133 RTL819x_2GHZ_CH14,
134 RTL819x_5GHZ_5725_5850,
135 }
136 };
137
138 static const struct ieee80211_regdomain rtl_regdom_14 = {
139 .n_reg_rules = 3,
140 .alpha2 = "99",
141 .reg_rules = {
142 RTL819x_2GHZ_CH01_11,
143 RTL819x_2GHZ_CH12_13,
144 RTL819x_2GHZ_CH14,
145 }
146 };
147
_rtl_is_radar_freq(u16 center_freq)148 static bool _rtl_is_radar_freq(u16 center_freq)
149 {
150 return (center_freq >= 5260 && center_freq <= 5700);
151 }
152
_rtl_reg_apply_beaconing_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator)153 static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy,
154 enum nl80211_reg_initiator initiator)
155 {
156 enum ieee80211_band band;
157 struct ieee80211_supported_band *sband;
158 const struct ieee80211_reg_rule *reg_rule;
159 struct ieee80211_channel *ch;
160 unsigned int i;
161 u32 bandwidth = 0;
162 int r;
163
164 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
165
166 if (!wiphy->bands[band])
167 continue;
168
169 sband = wiphy->bands[band];
170
171 for (i = 0; i < sband->n_channels; i++) {
172 ch = &sband->channels[i];
173 if (_rtl_is_radar_freq(ch->center_freq) ||
174 (ch->flags & IEEE80211_CHAN_RADAR))
175 continue;
176 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
177 r = freq_reg_info(wiphy, ch->center_freq,
178 bandwidth, ®_rule);
179 if (r)
180 continue;
181
182 /*
183 *If 11d had a rule for this channel ensure
184 *we enable adhoc/beaconing if it allows us to
185 *use it. Note that we would have disabled it
186 *by applying our static world regdomain by
187 *default during init, prior to calling our
188 *regulatory_hint().
189 */
190
191 if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
192 ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
193 if (!(reg_rule->
194 flags & NL80211_RRF_PASSIVE_SCAN))
195 ch->flags &=
196 ~IEEE80211_CHAN_PASSIVE_SCAN;
197 } else {
198 if (ch->beacon_found)
199 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
200 IEEE80211_CHAN_PASSIVE_SCAN);
201 }
202 }
203 }
204 }
205
206 /* Allows active scan scan on Ch 12 and 13 */
_rtl_reg_apply_active_scan_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator)207 static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy,
208 enum nl80211_reg_initiator
209 initiator)
210 {
211 struct ieee80211_supported_band *sband;
212 struct ieee80211_channel *ch;
213 const struct ieee80211_reg_rule *reg_rule;
214 u32 bandwidth = 0;
215 int r;
216
217 if (!wiphy->bands[IEEE80211_BAND_2GHZ])
218 return;
219 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
220
221 /*
222 *If no country IE has been received always enable active scan
223 *on these channels. This is only done for specific regulatory SKUs
224 */
225 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
226 ch = &sband->channels[11]; /* CH 12 */
227 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
228 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
229 ch = &sband->channels[12]; /* CH 13 */
230 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
231 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
232 return;
233 }
234
235 /*
236 *If a country IE has been received check its rule for this
237 *channel first before enabling active scan. The passive scan
238 *would have been enforced by the initial processing of our
239 *custom regulatory domain.
240 */
241
242 ch = &sband->channels[11]; /* CH 12 */
243 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
244 if (!r) {
245 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
246 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
247 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
248 }
249
250 ch = &sband->channels[12]; /* CH 13 */
251 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
252 if (!r) {
253 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
254 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
255 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
256 }
257 }
258
259 /*
260 *Always apply Radar/DFS rules on
261 *freq range 5260 MHz - 5700 MHz
262 */
_rtl_reg_apply_radar_flags(struct wiphy * wiphy)263 static void _rtl_reg_apply_radar_flags(struct wiphy *wiphy)
264 {
265 struct ieee80211_supported_band *sband;
266 struct ieee80211_channel *ch;
267 unsigned int i;
268
269 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
270 return;
271
272 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
273
274 for (i = 0; i < sband->n_channels; i++) {
275 ch = &sband->channels[i];
276 if (!_rtl_is_radar_freq(ch->center_freq))
277 continue;
278
279 /*
280 *We always enable radar detection/DFS on this
281 *frequency range. Additionally we also apply on
282 *this frequency range:
283 *- If STA mode does not yet have DFS supports disable
284 * active scanning
285 *- If adhoc mode does not support DFS yet then disable
286 * adhoc in the frequency.
287 *- If AP mode does not yet support radar detection/DFS
288 *do not allow AP mode
289 */
290 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
291 ch->flags |= IEEE80211_CHAN_RADAR |
292 IEEE80211_CHAN_NO_IBSS |
293 IEEE80211_CHAN_PASSIVE_SCAN;
294 }
295 }
296
_rtl_reg_apply_world_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator,struct rtl_regulatory * reg)297 static void _rtl_reg_apply_world_flags(struct wiphy *wiphy,
298 enum nl80211_reg_initiator initiator,
299 struct rtl_regulatory *reg)
300 {
301 _rtl_reg_apply_beaconing_flags(wiphy, initiator);
302 _rtl_reg_apply_active_scan_flags(wiphy, initiator);
303 return;
304 }
305
_rtl_reg_notifier_apply(struct wiphy * wiphy,struct regulatory_request * request,struct rtl_regulatory * reg)306 static int _rtl_reg_notifier_apply(struct wiphy *wiphy,
307 struct regulatory_request *request,
308 struct rtl_regulatory *reg)
309 {
310 /* We always apply this */
311 _rtl_reg_apply_radar_flags(wiphy);
312
313 switch (request->initiator) {
314 case NL80211_REGDOM_SET_BY_DRIVER:
315 case NL80211_REGDOM_SET_BY_CORE:
316 case NL80211_REGDOM_SET_BY_USER:
317 break;
318 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
319 _rtl_reg_apply_world_flags(wiphy, request->initiator, reg);
320 break;
321 }
322
323 return 0;
324 }
325
_rtl_regdomain_select(struct rtl_regulatory * reg)326 static const struct ieee80211_regdomain *_rtl_regdomain_select(
327 struct rtl_regulatory *reg)
328 {
329 switch (reg->country_code) {
330 case COUNTRY_CODE_FCC:
331 return &rtl_regdom_no_midband;
332 case COUNTRY_CODE_IC:
333 return &rtl_regdom_11;
334 case COUNTRY_CODE_ETSI:
335 case COUNTRY_CODE_TELEC_NETGEAR:
336 return &rtl_regdom_60_64;
337 case COUNTRY_CODE_SPAIN:
338 case COUNTRY_CODE_FRANCE:
339 case COUNTRY_CODE_ISRAEL:
340 case COUNTRY_CODE_WORLD_WIDE_13:
341 return &rtl_regdom_12_13;
342 case COUNTRY_CODE_MKK:
343 case COUNTRY_CODE_MKK1:
344 case COUNTRY_CODE_TELEC:
345 case COUNTRY_CODE_MIC:
346 return &rtl_regdom_14_60_64;
347 case COUNTRY_CODE_GLOBAL_DOMAIN:
348 return &rtl_regdom_14;
349 default:
350 return &rtl_regdom_no_midband;
351 }
352 }
353
_rtl_regd_init_wiphy(struct rtl_regulatory * reg,struct wiphy * wiphy,int (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))354 static int _rtl_regd_init_wiphy(struct rtl_regulatory *reg,
355 struct wiphy *wiphy,
356 int (*reg_notifier) (struct wiphy *wiphy,
357 struct regulatory_request *
358 request))
359 {
360 const struct ieee80211_regdomain *regd;
361
362 wiphy->reg_notifier = reg_notifier;
363
364 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
365 wiphy->flags &= ~WIPHY_FLAG_STRICT_REGULATORY;
366 wiphy->flags &= ~WIPHY_FLAG_DISABLE_BEACON_HINTS;
367
368 regd = _rtl_regdomain_select(reg);
369 wiphy_apply_custom_regulatory(wiphy, regd);
370 _rtl_reg_apply_radar_flags(wiphy);
371 _rtl_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
372 return 0;
373 }
374
_rtl_regd_find_country(u16 countrycode)375 static struct country_code_to_enum_rd *_rtl_regd_find_country(u16 countrycode)
376 {
377 int i;
378
379 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
380 if (allCountries[i].countrycode == countrycode)
381 return &allCountries[i];
382 }
383 return NULL;
384 }
385
rtl_regd_init(struct ieee80211_hw * hw,int (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))386 int rtl_regd_init(struct ieee80211_hw *hw,
387 int (*reg_notifier) (struct wiphy *wiphy,
388 struct regulatory_request *request))
389 {
390 struct rtl_priv *rtlpriv = rtl_priv(hw);
391 struct wiphy *wiphy = hw->wiphy;
392 struct country_code_to_enum_rd *country = NULL;
393
394 if (wiphy == NULL || &rtlpriv->regd == NULL)
395 return -EINVAL;
396
397 /* init country_code from efuse channel plan */
398 rtlpriv->regd.country_code = rtlpriv->efuse.channel_plan;
399
400 RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
401 "rtl: EEPROM regdomain: 0x%0x\n", rtlpriv->regd.country_code);
402
403 if (rtlpriv->regd.country_code >= COUNTRY_CODE_MAX) {
404 RT_TRACE(rtlpriv, COMP_REGD, DBG_DMESG,
405 "rtl: EEPROM indicates invalid contry code, world wide 13 should be used\n");
406
407 rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13;
408 }
409
410 country = _rtl_regd_find_country(rtlpriv->regd.country_code);
411
412 if (country) {
413 rtlpriv->regd.alpha2[0] = country->iso_name[0];
414 rtlpriv->regd.alpha2[1] = country->iso_name[1];
415 } else {
416 rtlpriv->regd.alpha2[0] = '0';
417 rtlpriv->regd.alpha2[1] = '0';
418 }
419
420 RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
421 "rtl: Country alpha2 being used: %c%c\n",
422 rtlpriv->regd.alpha2[0], rtlpriv->regd.alpha2[1]);
423
424 _rtl_regd_init_wiphy(&rtlpriv->regd, wiphy, reg_notifier);
425
426 return 0;
427 }
428
rtl_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)429 int rtl_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
430 {
431 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
432 struct rtl_priv *rtlpriv = rtl_priv(hw);
433
434 RT_TRACE(rtlpriv, COMP_REGD, DBG_LOUD, "\n");
435
436 return _rtl_reg_notifier_apply(wiphy, request, &rtlpriv->regd);
437 }
438