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0c817338 LF |
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 | * 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 | static const struct ieee80211_regdomain rtl_regdom_11 = { | |
70 | .n_reg_rules = 1, | |
71 | .alpha2 = "99", | |
72 | .reg_rules = { | |
73 | RTL819x_2GHZ_CH01_11, | |
74 | } | |
75 | }; | |
76 | ||
77 | static const struct ieee80211_regdomain rtl_regdom_global = { | |
78 | .n_reg_rules = 3, | |
79 | .alpha2 = "99", | |
80 | .reg_rules = { | |
81 | RTL819x_2GHZ_CH01_11, | |
82 | RTL819x_2GHZ_CH12_13, | |
83 | RTL819x_2GHZ_CH14, | |
84 | } | |
85 | }; | |
86 | ||
87 | static const struct ieee80211_regdomain rtl_regdom_world = { | |
88 | .n_reg_rules = 2, | |
89 | .alpha2 = "99", | |
90 | .reg_rules = { | |
91 | RTL819x_2GHZ_CH01_11, | |
92 | RTL819x_2GHZ_CH12_13, | |
93 | } | |
94 | }; | |
95 | ||
96 | static bool _rtl_is_radar_freq(u16 center_freq) | |
97 | { | |
98 | return (center_freq >= 5260 && center_freq <= 5700); | |
99 | } | |
100 | ||
101 | static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy, | |
102 | enum nl80211_reg_initiator initiator) | |
103 | { | |
104 | enum ieee80211_band band; | |
105 | struct ieee80211_supported_band *sband; | |
106 | const struct ieee80211_reg_rule *reg_rule; | |
107 | struct ieee80211_channel *ch; | |
108 | unsigned int i; | |
109 | u32 bandwidth = 0; | |
110 | int r; | |
111 | ||
112 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
113 | ||
114 | if (!wiphy->bands[band]) | |
115 | continue; | |
116 | ||
117 | sband = wiphy->bands[band]; | |
118 | ||
119 | for (i = 0; i < sband->n_channels; i++) { | |
120 | ch = &sband->channels[i]; | |
121 | if (_rtl_is_radar_freq(ch->center_freq) || | |
122 | (ch->flags & IEEE80211_CHAN_RADAR)) | |
123 | continue; | |
124 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
125 | r = freq_reg_info(wiphy, ch->center_freq, | |
126 | bandwidth, ®_rule); | |
127 | if (r) | |
128 | continue; | |
129 | ||
130 | /* | |
131 | *If 11d had a rule for this channel ensure | |
132 | *we enable adhoc/beaconing if it allows us to | |
133 | *use it. Note that we would have disabled it | |
134 | *by applying our static world regdomain by | |
135 | *default during init, prior to calling our | |
136 | *regulatory_hint(). | |
137 | */ | |
138 | ||
139 | if (!(reg_rule->flags & NL80211_RRF_NO_IBSS)) | |
140 | ch->flags &= ~IEEE80211_CHAN_NO_IBSS; | |
141 | if (!(reg_rule-> | |
142 | flags & NL80211_RRF_PASSIVE_SCAN)) | |
143 | ch->flags &= | |
144 | ~IEEE80211_CHAN_PASSIVE_SCAN; | |
145 | } else { | |
146 | if (ch->beacon_found) | |
147 | ch->flags &= ~(IEEE80211_CHAN_NO_IBSS | | |
148 | IEEE80211_CHAN_PASSIVE_SCAN); | |
149 | } | |
150 | } | |
151 | } | |
152 | } | |
153 | ||
154 | /* Allows active scan scan on Ch 12 and 13 */ | |
155 | static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy, | |
156 | enum nl80211_reg_initiator | |
157 | initiator) | |
158 | { | |
159 | struct ieee80211_supported_band *sband; | |
160 | struct ieee80211_channel *ch; | |
161 | const struct ieee80211_reg_rule *reg_rule; | |
162 | u32 bandwidth = 0; | |
163 | int r; | |
164 | ||
165 | sband = wiphy->bands[IEEE80211_BAND_2GHZ]; | |
166 | ||
167 | /* | |
168 | *If no country IE has been received always enable active scan | |
169 | *on these channels. This is only done for specific regulatory SKUs | |
170 | */ | |
171 | if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
172 | ch = &sband->channels[11]; /* CH 12 */ | |
173 | if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
174 | ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; | |
175 | ch = &sband->channels[12]; /* CH 13 */ | |
176 | if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
177 | ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; | |
178 | return; | |
179 | } | |
180 | ||
181 | /* | |
25985edc | 182 | *If a country IE has been received check its rule for this |
0c817338 LF |
183 | *channel first before enabling active scan. The passive scan |
184 | *would have been enforced by the initial processing of our | |
185 | *custom regulatory domain. | |
186 | */ | |
187 | ||
188 | ch = &sband->channels[11]; /* CH 12 */ | |
189 | r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); | |
190 | if (!r) { | |
191 | if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) | |
192 | if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
193 | ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; | |
194 | } | |
195 | ||
196 | ch = &sband->channels[12]; /* CH 13 */ | |
197 | r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); | |
198 | if (!r) { | |
199 | if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) | |
200 | if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
201 | ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; | |
202 | } | |
203 | } | |
204 | ||
205 | /* | |
206 | *Always apply Radar/DFS rules on | |
207 | *freq range 5260 MHz - 5700 MHz | |
208 | */ | |
209 | static void _rtl_reg_apply_radar_flags(struct wiphy *wiphy) | |
210 | { | |
211 | struct ieee80211_supported_band *sband; | |
212 | struct ieee80211_channel *ch; | |
213 | unsigned int i; | |
214 | ||
215 | if (!wiphy->bands[IEEE80211_BAND_5GHZ]) | |
216 | return; | |
217 | ||
218 | sband = wiphy->bands[IEEE80211_BAND_5GHZ]; | |
219 | ||
220 | for (i = 0; i < sband->n_channels; i++) { | |
221 | ch = &sband->channels[i]; | |
222 | if (!_rtl_is_radar_freq(ch->center_freq)) | |
223 | continue; | |
224 | ||
225 | /* | |
226 | *We always enable radar detection/DFS on this | |
227 | *frequency range. Additionally we also apply on | |
228 | *this frequency range: | |
229 | *- If STA mode does not yet have DFS supports disable | |
230 | * active scanning | |
231 | *- If adhoc mode does not support DFS yet then disable | |
232 | * adhoc in the frequency. | |
233 | *- If AP mode does not yet support radar detection/DFS | |
234 | *do not allow AP mode | |
235 | */ | |
236 | if (!(ch->flags & IEEE80211_CHAN_DISABLED)) | |
237 | ch->flags |= IEEE80211_CHAN_RADAR | | |
238 | IEEE80211_CHAN_NO_IBSS | | |
239 | IEEE80211_CHAN_PASSIVE_SCAN; | |
240 | } | |
241 | } | |
242 | ||
243 | static void _rtl_reg_apply_world_flags(struct wiphy *wiphy, | |
244 | enum nl80211_reg_initiator initiator, | |
245 | struct rtl_regulatory *reg) | |
246 | { | |
247 | _rtl_reg_apply_beaconing_flags(wiphy, initiator); | |
248 | _rtl_reg_apply_active_scan_flags(wiphy, initiator); | |
249 | return; | |
250 | } | |
251 | ||
252 | static void _rtl_dump_channel_map(struct wiphy *wiphy) | |
253 | { | |
254 | enum ieee80211_band band; | |
255 | struct ieee80211_supported_band *sband; | |
256 | struct ieee80211_channel *ch; | |
257 | unsigned int i; | |
258 | ||
259 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
260 | if (!wiphy->bands[band]) | |
261 | continue; | |
262 | sband = wiphy->bands[band]; | |
263 | for (i = 0; i < sband->n_channels; i++) | |
264 | ch = &sband->channels[i]; | |
265 | } | |
266 | } | |
267 | ||
268 | static int _rtl_reg_notifier_apply(struct wiphy *wiphy, | |
269 | struct regulatory_request *request, | |
270 | struct rtl_regulatory *reg) | |
271 | { | |
272 | /* We always apply this */ | |
273 | _rtl_reg_apply_radar_flags(wiphy); | |
274 | ||
275 | switch (request->initiator) { | |
276 | case NL80211_REGDOM_SET_BY_DRIVER: | |
277 | case NL80211_REGDOM_SET_BY_CORE: | |
278 | case NL80211_REGDOM_SET_BY_USER: | |
279 | break; | |
280 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
281 | _rtl_reg_apply_world_flags(wiphy, request->initiator, reg); | |
282 | break; | |
283 | } | |
284 | ||
285 | _rtl_dump_channel_map(wiphy); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | static const struct ieee80211_regdomain *_rtl_regdomain_select( | |
291 | struct rtl_regulatory *reg) | |
292 | { | |
293 | switch (reg->country_code) { | |
294 | case COUNTRY_CODE_FCC: | |
295 | case COUNTRY_CODE_IC: | |
296 | return &rtl_regdom_11; | |
297 | case COUNTRY_CODE_ETSI: | |
298 | case COUNTRY_CODE_SPAIN: | |
299 | case COUNTRY_CODE_FRANCE: | |
300 | case COUNTRY_CODE_ISRAEL: | |
301 | case COUNTRY_CODE_TELEC_NETGEAR: | |
302 | return &rtl_regdom_world; | |
303 | case COUNTRY_CODE_MKK: | |
304 | case COUNTRY_CODE_MKK1: | |
305 | case COUNTRY_CODE_TELEC: | |
306 | case COUNTRY_CODE_MIC: | |
307 | return &rtl_regdom_global; | |
308 | case COUNTRY_CODE_GLOBAL_DOMAIN: | |
309 | return &rtl_regdom_global; | |
310 | case COUNTRY_CODE_WORLD_WIDE_13: | |
311 | return &rtl_regdom_world; | |
312 | default: | |
313 | return &rtl_regdom_world; | |
314 | } | |
315 | } | |
316 | ||
317 | static int _rtl_regd_init_wiphy(struct rtl_regulatory *reg, | |
318 | struct wiphy *wiphy, | |
319 | int (*reg_notifier) (struct wiphy *wiphy, | |
320 | struct regulatory_request * | |
321 | request)) | |
322 | { | |
323 | const struct ieee80211_regdomain *regd; | |
324 | ||
325 | wiphy->reg_notifier = reg_notifier; | |
326 | wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; | |
327 | wiphy->flags &= ~WIPHY_FLAG_STRICT_REGULATORY; | |
328 | wiphy->flags &= ~WIPHY_FLAG_DISABLE_BEACON_HINTS; | |
329 | regd = _rtl_regdomain_select(reg); | |
330 | wiphy_apply_custom_regulatory(wiphy, regd); | |
331 | _rtl_reg_apply_radar_flags(wiphy); | |
332 | _rtl_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static struct country_code_to_enum_rd *_rtl_regd_find_country(u16 countrycode) | |
337 | { | |
338 | int i; | |
339 | ||
340 | for (i = 0; i < ARRAY_SIZE(allCountries); i++) { | |
341 | if (allCountries[i].countrycode == countrycode) | |
342 | return &allCountries[i]; | |
343 | } | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | int rtl_regd_init(struct ieee80211_hw *hw, | |
348 | int (*reg_notifier) (struct wiphy *wiphy, | |
349 | struct regulatory_request *request)) | |
350 | { | |
351 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
352 | struct wiphy *wiphy = hw->wiphy; | |
353 | struct country_code_to_enum_rd *country = NULL; | |
354 | ||
355 | if (wiphy == NULL || &rtlpriv->regd == NULL) | |
356 | return -EINVAL; | |
357 | ||
358 | /* force the channel plan to world wide 13 */ | |
359 | rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13; | |
360 | ||
361 | RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE, | |
362 | (KERN_DEBUG "rtl: EEPROM regdomain: 0x%0x\n", | |
363 | rtlpriv->regd.country_code)); | |
364 | ||
365 | if (rtlpriv->regd.country_code >= COUNTRY_CODE_MAX) { | |
366 | RT_TRACE(rtlpriv, COMP_REGD, DBG_DMESG, | |
367 | (KERN_DEBUG "rtl: EEPROM indicates invalid contry code" | |
368 | "world wide 13 should be used\n")); | |
369 | ||
370 | rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13; | |
371 | } | |
372 | ||
373 | country = _rtl_regd_find_country(rtlpriv->regd.country_code); | |
374 | ||
375 | if (country) { | |
376 | rtlpriv->regd.alpha2[0] = country->isoName[0]; | |
377 | rtlpriv->regd.alpha2[1] = country->isoName[1]; | |
378 | } else { | |
379 | rtlpriv->regd.alpha2[0] = '0'; | |
380 | rtlpriv->regd.alpha2[1] = '0'; | |
381 | } | |
382 | ||
383 | RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE, | |
384 | (KERN_DEBUG "rtl: Country alpha2 being used: %c%c\n", | |
385 | rtlpriv->regd.alpha2[0], rtlpriv->regd.alpha2[1])); | |
386 | ||
387 | _rtl_regd_init_wiphy(&rtlpriv->regd, wiphy, reg_notifier); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | int rtl_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) | |
393 | { | |
394 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
395 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
396 | ||
397 | RT_TRACE(rtlpriv, COMP_REGD, DBG_LOUD, ("\n")); | |
398 | ||
399 | return _rtl_reg_notifier_apply(wiphy, request, &rtlpriv->regd); | |
400 | } |