1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 *
4 * Copyright(c) 2009-2010 Realtek Corporation.
5 *
6 *****************************************************************************/
7
8 #include <drv_types.h>
9 #include <rtw_debug.h>
10
11 #include <rtw_wifi_regd.h>
12
13 /*
14 * REG_RULE(freq start, freq end, bandwidth, max gain, eirp, reg_flags)
15 */
16
17 /*
18 * Only these channels all allow active
19 * scan on all world regulatory domains
20 */
21
22 /* 2G chan 01 - chan 11 */
23 #define RTW_2GHZ_CH01_11 \
24 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
25
26 /*
27 * We enable active scan on these a case
28 * by case basis by regulatory domain
29 */
30
31 /* 2G chan 12 - chan 13, PASSIV SCAN */
32 #define RTW_2GHZ_CH12_13 \
33 REG_RULE(2467 - 10, 2472 + 10, 40, 0, 20, \
34 NL80211_RRF_PASSIVE_SCAN)
35
36 /* 2G chan 14, PASSIVS SCAN, NO OFDM (B only) */
37 #define RTW_2GHZ_CH14 \
38 REG_RULE(2484 - 10, 2484 + 10, 40, 0, 20, \
39 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
40
41 static const struct ieee80211_regdomain rtw_regdom_rd = {
42 .n_reg_rules = 3,
43 .alpha2 = "99",
44 .reg_rules = {
45 RTW_2GHZ_CH01_11,
46 RTW_2GHZ_CH12_13,
47 }
48 };
49
rtw_ieee80211_channel_to_frequency(int chan,int band)50 static int rtw_ieee80211_channel_to_frequency(int chan, int band)
51 {
52 /* see 802.11 17.3.8.3.2 and Annex J
53 * there are overlapping channel numbers in 5GHz and 2GHz bands
54 */
55
56 /* NL80211_BAND_2GHZ */
57 if (chan == 14)
58 return 2484;
59 else if (chan < 14)
60 return 2407 + chan * 5;
61 else
62 return 0; /* not supported */
63 }
64
_rtw_reg_apply_flags(struct wiphy * wiphy)65 static void _rtw_reg_apply_flags(struct wiphy *wiphy)
66 {
67 struct adapter *padapter = wiphy_to_adapter(wiphy);
68 struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
69 RT_CHANNEL_INFO *channel_set = pmlmeext->channel_set;
70 u8 max_chan_nums = pmlmeext->max_chan_nums;
71
72 struct ieee80211_supported_band *sband;
73 struct ieee80211_channel *ch;
74 unsigned int i, j;
75 u16 channel;
76 u32 freq;
77
78 /* all channels disable */
79 for (i = 0; i < NUM_NL80211_BANDS; i++) {
80 sband = wiphy->bands[i];
81
82 if (sband) {
83 for (j = 0; j < sband->n_channels; j++) {
84 ch = &sband->channels[j];
85
86 if (ch)
87 ch->flags = IEEE80211_CHAN_DISABLED;
88 }
89 }
90 }
91
92 /* channels apply by channel plans. */
93 for (i = 0; i < max_chan_nums; i++) {
94 channel = channel_set[i].ChannelNum;
95 freq =
96 rtw_ieee80211_channel_to_frequency(channel,
97 NL80211_BAND_2GHZ);
98
99 ch = ieee80211_get_channel(wiphy, freq);
100 if (ch) {
101 if (channel_set[i].ScanType == SCAN_PASSIVE)
102 ch->flags = IEEE80211_CHAN_NO_IR;
103 else
104 ch->flags = 0;
105 }
106 }
107 }
108
_rtw_reg_notifier_apply(struct wiphy * wiphy,struct regulatory_request * request,struct rtw_regulatory * reg)109 static int _rtw_reg_notifier_apply(struct wiphy *wiphy,
110 struct regulatory_request *request,
111 struct rtw_regulatory *reg)
112 {
113 /* Hard code flags */
114 _rtw_reg_apply_flags(wiphy);
115 return 0;
116 }
117
_rtw_regdomain_select(struct rtw_regulatory * reg)118 static const struct ieee80211_regdomain *_rtw_regdomain_select(struct
119 rtw_regulatory
120 *reg)
121 {
122 return &rtw_regdom_rd;
123 }
124
_rtw_regd_init_wiphy(struct rtw_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))125 static void _rtw_regd_init_wiphy(struct rtw_regulatory *reg,
126 struct wiphy *wiphy,
127 void (*reg_notifier)(struct wiphy *wiphy,
128 struct
129 regulatory_request *
130 request))
131 {
132 const struct ieee80211_regdomain *regd;
133
134 wiphy->reg_notifier = reg_notifier;
135
136 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
137 wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG;
138 wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS;
139
140 regd = _rtw_regdomain_select(reg);
141 wiphy_apply_custom_regulatory(wiphy, regd);
142
143 /* Hard code flags */
144 _rtw_reg_apply_flags(wiphy);
145 }
146
rtw_regd_init(struct adapter * padapter,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))147 int rtw_regd_init(struct adapter *padapter,
148 void (*reg_notifier)(struct wiphy *wiphy,
149 struct regulatory_request *request))
150 {
151 struct wiphy *wiphy = padapter->rtw_wdev->wiphy;
152
153 _rtw_regd_init_wiphy(NULL, wiphy, reg_notifier);
154
155 return 0;
156 }
157
rtw_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)158 void rtw_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
159 {
160 struct rtw_regulatory *reg = NULL;
161
162 DBG_8192C("%s\n", __func__);
163
164 _rtw_reg_notifier_apply(wiphy, request, reg);
165 }
166
