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 static const struct ieee80211_regdomain rtw_regdom_rd = {
37 .n_reg_rules = 2,
38 .alpha2 = "99",
39 .reg_rules = {
40 RTW_2GHZ_CH01_11,
41 RTW_2GHZ_CH12_13,
42 }
43 };
44
rtw_ieee80211_channel_to_frequency(int chan,int band)45 static int rtw_ieee80211_channel_to_frequency(int chan, int band)
46 {
47 /* see 802.11 17.3.8.3.2 and Annex J
48 * there are overlapping channel numbers in 5GHz and 2GHz bands
49 */
50
51 /* NL80211_BAND_2GHZ */
52 if (chan == 14)
53 return 2484;
54 else if (chan < 14)
55 return 2407 + chan * 5;
56 else
57 return 0; /* not supported */
58 }
59
_rtw_reg_apply_flags(struct wiphy * wiphy)60 static void _rtw_reg_apply_flags(struct wiphy *wiphy)
61 {
62 struct adapter *padapter = wiphy_to_adapter(wiphy);
63 struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
64 RT_CHANNEL_INFO *channel_set = pmlmeext->channel_set;
65 u8 max_chan_nums = pmlmeext->max_chan_nums;
66
67 struct ieee80211_supported_band *sband;
68 struct ieee80211_channel *ch;
69 unsigned int i, j;
70 u16 channel;
71 u32 freq;
72
73 /* all channels disable */
74 for (i = 0; i < NUM_NL80211_BANDS; i++) {
75 sband = wiphy->bands[i];
76
77 if (sband) {
78 for (j = 0; j < sband->n_channels; j++) {
79 ch = &sband->channels[j];
80
81 if (ch)
82 ch->flags = IEEE80211_CHAN_DISABLED;
83 }
84 }
85 }
86
87 /* channels apply by channel plans. */
88 for (i = 0; i < max_chan_nums; i++) {
89 channel = channel_set[i].ChannelNum;
90 freq =
91 rtw_ieee80211_channel_to_frequency(channel,
92 NL80211_BAND_2GHZ);
93
94 ch = ieee80211_get_channel(wiphy, freq);
95 if (ch) {
96 if (channel_set[i].ScanType == SCAN_PASSIVE)
97 ch->flags = IEEE80211_CHAN_NO_IR;
98 else
99 ch->flags = 0;
100 }
101 }
102 }
103
_rtw_reg_notifier_apply(struct wiphy * wiphy,struct regulatory_request * request,struct rtw_regulatory * reg)104 static int _rtw_reg_notifier_apply(struct wiphy *wiphy,
105 struct regulatory_request *request,
106 struct rtw_regulatory *reg)
107 {
108 /* Hard code flags */
109 _rtw_reg_apply_flags(wiphy);
110 return 0;
111 }
112
_rtw_regdomain_select(struct rtw_regulatory * reg)113 static const struct ieee80211_regdomain *_rtw_regdomain_select(struct
114 rtw_regulatory
115 *reg)
116 {
117 return &rtw_regdom_rd;
118 }
119
_rtw_regd_init_wiphy(struct rtw_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))120 static void _rtw_regd_init_wiphy(struct rtw_regulatory *reg,
121 struct wiphy *wiphy,
122 void (*reg_notifier)(struct wiphy *wiphy,
123 struct
124 regulatory_request *
125 request))
126 {
127 const struct ieee80211_regdomain *regd;
128
129 wiphy->reg_notifier = reg_notifier;
130
131 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
132 wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG;
133 wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS;
134
135 regd = _rtw_regdomain_select(reg);
136 wiphy_apply_custom_regulatory(wiphy, regd);
137
138 /* Hard code flags */
139 _rtw_reg_apply_flags(wiphy);
140 }
141
rtw_regd_init(struct adapter * padapter,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))142 int rtw_regd_init(struct adapter *padapter,
143 void (*reg_notifier)(struct wiphy *wiphy,
144 struct regulatory_request *request))
145 {
146 struct wiphy *wiphy = padapter->rtw_wdev->wiphy;
147
148 _rtw_regd_init_wiphy(NULL, wiphy, reg_notifier);
149
150 return 0;
151 }
152
rtw_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)153 void rtw_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
154 {
155 struct rtw_regulatory *reg = NULL;
156
157 DBG_8192C("%s\n", __func__);
158
159 _rtw_reg_notifier_apply(wiphy, request, reg);
160 }
161