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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
33static 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_NO_IR)
63
64#define RTL819x_2GHZ_CH14 \
65 REG_RULE(2484-10, 2484+10, 40, 0, 20, \
66 NL80211_RRF_NO_IR | NL80211_RRF_NO_OFDM)
67
68/* 5G chan 36 - chan 64*/
69#define RTL819x_5GHZ_5150_5350 \
70 REG_RULE(5150-10, 5350+10, 40, 0, 30, \
71 NL80211_RRF_NO_IR)
72
73/* 5G chan 100 - chan 165*/
74#define RTL819x_5GHZ_5470_5850 \
75 REG_RULE(5470-10, 5850+10, 40, 0, 30, \
76 NL80211_RRF_NO_IR)
77
78/* 5G chan 149 - chan 165*/
79#define RTL819x_5GHZ_5725_5850 \
80 REG_RULE(5725-10, 5850+10, 40, 0, 30, \
81 NL80211_RRF_NO_IR)
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
160 if (!wiphy->bands[band])
161 continue;
162
163 sband = wiphy->bands[band];
164
165 for (i = 0; i < sband->n_channels; i++) {
166 ch = &sband->channels[i];
167 if (_rtl_is_radar_freq(ch->center_freq) ||
168 (ch->flags & IEEE80211_CHAN_RADAR))
169 continue;
170 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
171 reg_rule = freq_reg_info(wiphy,
172 MHZ_TO_KHZ(ch->center_freq));
173 if (IS_ERR(reg_rule))
174 continue;
175
176 /*
177 *If 11d had a rule for this channel ensure
178 *we enable adhoc/beaconing if it allows us to
179 *use it. Note that we would have disabled it
180 *by applying our static world regdomain by
181 *default during init, prior to calling our
182 *regulatory_hint().
183 */
184
185 if (!(reg_rule->flags & NL80211_RRF_NO_IR))
186 ch->flags &= ~IEEE80211_CHAN_NO_IR;
187 } else {
188 if (ch->beacon_found)
189 ch->flags &= ~IEEE80211_CHAN_NO_IR;
190 }
191 }
192 }
193}
194
195/* Allows active scan scan on Ch 12 and 13 */
196static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy,
197 enum nl80211_reg_initiator
198 initiator)
199{
200 struct ieee80211_supported_band *sband;
201 struct ieee80211_channel *ch;
202 const struct ieee80211_reg_rule *reg_rule;
203
204 if (!wiphy->bands[IEEE80211_BAND_2GHZ])
205 return;
206 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
207
208 /*
209 *If no country IE has been received always enable active scan
210 *on these channels. This is only done for specific regulatory SKUs
211 */
212 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
213 ch = &sband->channels[11]; /* CH 12 */
214 if (ch->flags & IEEE80211_CHAN_NO_IR)
215 ch->flags &= ~IEEE80211_CHAN_NO_IR;
216 ch = &sband->channels[12]; /* CH 13 */
217 if (ch->flags & IEEE80211_CHAN_NO_IR)
218 ch->flags &= ~IEEE80211_CHAN_NO_IR;
219 return;
220 }
221
222 /*
223 *If a country IE has been received check its rule for this
224 *channel first before enabling active scan. The passive scan
225 *would have been enforced by the initial processing of our
226 *custom regulatory domain.
227 */
228
229 ch = &sband->channels[11]; /* CH 12 */
230 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
231 if (!IS_ERR(reg_rule)) {
232 if (!(reg_rule->flags & NL80211_RRF_NO_IR))
233 if (ch->flags & IEEE80211_CHAN_NO_IR)
234 ch->flags &= ~IEEE80211_CHAN_NO_IR;
235 }
236
237 ch = &sband->channels[12]; /* CH 13 */
238 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
239 if (!IS_ERR(reg_rule)) {
240 if (!(reg_rule->flags & NL80211_RRF_NO_IR))
241 if (ch->flags & IEEE80211_CHAN_NO_IR)
242 ch->flags &= ~IEEE80211_CHAN_NO_IR;
243 }
244}
245
246/*
247 *Always apply Radar/DFS rules on
248 *freq range 5260 MHz - 5700 MHz
249 */
250static void _rtl_reg_apply_radar_flags(struct wiphy *wiphy)
251{
252 struct ieee80211_supported_band *sband;
253 struct ieee80211_channel *ch;
254 unsigned int i;
255
256 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
257 return;
258
259 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
260
261 for (i = 0; i < sband->n_channels; i++) {
262 ch = &sband->channels[i];
263 if (!_rtl_is_radar_freq(ch->center_freq))
264 continue;
265
266 /*
267 *We always enable radar detection/DFS on this
268 *frequency range. Additionally we also apply on
269 *this frequency range:
270 *- If STA mode does not yet have DFS supports disable
271 * active scanning
272 *- If adhoc mode does not support DFS yet then disable
273 * adhoc in the frequency.
274 *- If AP mode does not yet support radar detection/DFS
275 *do not allow AP mode
276 */
277 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
278 ch->flags |= IEEE80211_CHAN_RADAR |
279 IEEE80211_CHAN_NO_IR;
280 }
281}
282
283static void _rtl_reg_apply_world_flags(struct wiphy *wiphy,
284 enum nl80211_reg_initiator initiator,
285 struct rtl_regulatory *reg)
286{
287 _rtl_reg_apply_beaconing_flags(wiphy, initiator);
288 _rtl_reg_apply_active_scan_flags(wiphy, initiator);
289 return;
290}
291
292static void _rtl_reg_notifier_apply(struct wiphy *wiphy,
293 struct regulatory_request *request,
294 struct rtl_regulatory *reg)
295{
296 /* We always apply this */
297 _rtl_reg_apply_radar_flags(wiphy);
298
299 switch (request->initiator) {
300 case NL80211_REGDOM_SET_BY_DRIVER:
301 case NL80211_REGDOM_SET_BY_CORE:
302 case NL80211_REGDOM_SET_BY_USER:
303 break;
304 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
305 _rtl_reg_apply_world_flags(wiphy, request->initiator, reg);
306 break;
307 }
308}
309
310static const struct ieee80211_regdomain *_rtl_regdomain_select(
311 struct rtl_regulatory *reg)
312{
313 switch (reg->country_code) {
314 case COUNTRY_CODE_FCC:
315 return &rtl_regdom_no_midband;
316 case COUNTRY_CODE_IC:
317 return &rtl_regdom_11;
318 case COUNTRY_CODE_ETSI:
319 case COUNTRY_CODE_TELEC_NETGEAR:
320 return &rtl_regdom_60_64;
321 case COUNTRY_CODE_SPAIN:
322 case COUNTRY_CODE_FRANCE:
323 case COUNTRY_CODE_ISRAEL:
324 case COUNTRY_CODE_WORLD_WIDE_13:
325 return &rtl_regdom_12_13;
326 case COUNTRY_CODE_MKK:
327 case COUNTRY_CODE_MKK1:
328 case COUNTRY_CODE_TELEC:
329 case COUNTRY_CODE_MIC:
330 return &rtl_regdom_14_60_64;
331 case COUNTRY_CODE_GLOBAL_DOMAIN:
332 return &rtl_regdom_14;
333 default:
334 return &rtl_regdom_no_midband;
335 }
336}
337
338static int _rtl_regd_init_wiphy(struct rtl_regulatory *reg,
339 struct wiphy *wiphy,
340 void (*reg_notifier) (struct wiphy *wiphy,
341 struct regulatory_request *
342 request))
343{
344 const struct ieee80211_regdomain *regd;
345
346 wiphy->reg_notifier = reg_notifier;
347
348 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
349 wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG;
350 wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS;
351
352 regd = _rtl_regdomain_select(reg);
353 wiphy_apply_custom_regulatory(wiphy, regd);
354 _rtl_reg_apply_radar_flags(wiphy);
355 _rtl_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
356 return 0;
357}
358
359static struct country_code_to_enum_rd *_rtl_regd_find_country(u16 countrycode)
360{
361 int i;
362
363 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
364 if (allCountries[i].countrycode == countrycode)
365 return &allCountries[i];
366 }
367 return NULL;
368}
369
370int rtl_regd_init(struct ieee80211_hw *hw,
371 void (*reg_notifier) (struct wiphy *wiphy,
372 struct regulatory_request *request))
373{
374 struct rtl_priv *rtlpriv = rtl_priv(hw);
375 struct wiphy *wiphy = hw->wiphy;
376 struct country_code_to_enum_rd *country = NULL;
377
378 if (wiphy == NULL || &rtlpriv->regd == NULL)
379 return -EINVAL;
380
381 /* init country_code from efuse channel plan */
382 rtlpriv->regd.country_code = rtlpriv->efuse.channel_plan;
383
384 RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
385 "rtl: EEPROM regdomain: 0x%0x\n", rtlpriv->regd.country_code);
386
387 if (rtlpriv->regd.country_code >= COUNTRY_CODE_MAX) {
388 RT_TRACE(rtlpriv, COMP_REGD, DBG_DMESG,
389 "rtl: EEPROM indicates invalid contry code, world wide 13 should be used\n");
390
391 rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13;
392 }
393
394 country = _rtl_regd_find_country(rtlpriv->regd.country_code);
395
396 if (country) {
397 rtlpriv->regd.alpha2[0] = country->iso_name[0];
398 rtlpriv->regd.alpha2[1] = country->iso_name[1];
399 } else {
400 rtlpriv->regd.alpha2[0] = '0';
401 rtlpriv->regd.alpha2[1] = '0';
402 }
403
404 RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
405 "rtl: Country alpha2 being used: %c%c\n",
406 rtlpriv->regd.alpha2[0], rtlpriv->regd.alpha2[1]);
407
408 _rtl_regd_init_wiphy(&rtlpriv->regd, wiphy, reg_notifier);
409
410 return 0;
411}
412
413void rtl_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
414{
415 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
416 struct rtl_priv *rtlpriv = rtl_priv(hw);
417
418 RT_TRACE(rtlpriv, COMP_REGD, DBG_LOUD, "\n");
419
420 _rtl_reg_notifier_apply(wiphy, request, &rtlpriv->regd);
421}