1
2
3
4
5#include "debug.h"
6#include "sar.h"
7
8static int rtw89_query_sar_config_common(struct rtw89_dev *rtwdev, s32 *cfg)
9{
10 struct rtw89_sar_cfg_common *rtwsar = &rtwdev->sar.cfg_common;
11 enum rtw89_subband subband = rtwdev->hal.current_subband;
12
13 if (!rtwsar->set[subband])
14 return -ENODATA;
15
16 *cfg = rtwsar->cfg[subband];
17 return 0;
18}
19
20static const
21struct rtw89_sar_handler rtw89_sar_handlers[RTW89_SAR_SOURCE_NR] = {
22 [RTW89_SAR_SOURCE_COMMON] = {
23 .descr_sar_source = "RTW89_SAR_SOURCE_COMMON",
24 .txpwr_factor_sar = 2,
25 .query_sar_config = rtw89_query_sar_config_common,
26 },
27};
28
29#define rtw89_sar_set_src(_dev, _src, _cfg_name, _cfg_data) \
30 do { \
31 typeof(_src) _s = (_src); \
32 typeof(_dev) _d = (_dev); \
33 BUILD_BUG_ON(!rtw89_sar_handlers[_s].descr_sar_source); \
34 BUILD_BUG_ON(!rtw89_sar_handlers[_s].query_sar_config); \
35 lockdep_assert_held(&_d->mutex); \
36 _d->sar._cfg_name = *(_cfg_data); \
37 _d->sar.src = _s; \
38 } while (0)
39
40static s8 rtw89_txpwr_sar_to_mac(struct rtw89_dev *rtwdev, u8 fct, s32 cfg)
41{
42 const u8 fct_mac = rtwdev->chip->txpwr_factor_mac;
43 s32 cfg_mac;
44
45 cfg_mac = fct > fct_mac ?
46 cfg >> (fct - fct_mac) : cfg << (fct_mac - fct);
47
48 return (s8)clamp_t(s32, cfg_mac,
49 RTW89_SAR_TXPWR_MAC_MIN,
50 RTW89_SAR_TXPWR_MAC_MAX);
51}
52
53s8 rtw89_query_sar(struct rtw89_dev *rtwdev)
54{
55 const enum rtw89_sar_sources src = rtwdev->sar.src;
56
57 const struct rtw89_sar_handler *sar_hdl = &rtw89_sar_handlers[src];
58 int ret;
59 s32 cfg;
60 u8 fct;
61
62 lockdep_assert_held(&rtwdev->mutex);
63
64 if (src == RTW89_SAR_SOURCE_NONE)
65 return RTW89_SAR_TXPWR_MAC_MAX;
66
67 ret = sar_hdl->query_sar_config(rtwdev, &cfg);
68 if (ret)
69 return RTW89_SAR_TXPWR_MAC_MAX;
70
71 fct = sar_hdl->txpwr_factor_sar;
72
73 return rtw89_txpwr_sar_to_mac(rtwdev, fct, cfg);
74}
75
76void rtw89_print_sar(struct seq_file *m, struct rtw89_dev *rtwdev)
77{
78 const enum rtw89_sar_sources src = rtwdev->sar.src;
79
80 const struct rtw89_sar_handler *sar_hdl = &rtw89_sar_handlers[src];
81 const u8 fct_mac = rtwdev->chip->txpwr_factor_mac;
82 int ret;
83 s32 cfg;
84 u8 fct;
85
86 lockdep_assert_held(&rtwdev->mutex);
87
88 if (src == RTW89_SAR_SOURCE_NONE) {
89 seq_puts(m, "no SAR is applied\n");
90 return;
91 }
92
93 seq_printf(m, "source: %d (%s)\n", src, sar_hdl->descr_sar_source);
94
95 ret = sar_hdl->query_sar_config(rtwdev, &cfg);
96 if (ret) {
97 seq_printf(m, "config: return code: %d\n", ret);
98 seq_printf(m, "assign: max setting: %d (unit: 1/%lu dBm)\n",
99 RTW89_SAR_TXPWR_MAC_MAX, BIT(fct_mac));
100 return;
101 }
102
103 fct = sar_hdl->txpwr_factor_sar;
104
105 seq_printf(m, "config: %d (unit: 1/%lu dBm)\n", cfg, BIT(fct));
106}
107
108static int rtw89_apply_sar_common(struct rtw89_dev *rtwdev,
109 const struct rtw89_sar_cfg_common *sar)
110{
111 enum rtw89_sar_sources src;
112 int ret = 0;
113
114 mutex_lock(&rtwdev->mutex);
115
116 src = rtwdev->sar.src;
117 if (src != RTW89_SAR_SOURCE_NONE && src != RTW89_SAR_SOURCE_COMMON) {
118 rtw89_warn(rtwdev, "SAR source: %d is in use", src);
119 ret = -EBUSY;
120 goto exit;
121 }
122
123 rtw89_sar_set_src(rtwdev, RTW89_SAR_SOURCE_COMMON, cfg_common, sar);
124 rtw89_chip_set_txpwr(rtwdev);
125
126exit:
127 mutex_unlock(&rtwdev->mutex);
128 return ret;
129}
130
131static const u8 rtw89_common_sar_subband_map[] = {
132 RTW89_CH_2G,
133 RTW89_CH_5G_BAND_1,
134 RTW89_CH_5G_BAND_3,
135 RTW89_CH_5G_BAND_4,
136};
137
138static const struct cfg80211_sar_freq_ranges rtw89_common_sar_freq_ranges[] = {
139 { .start_freq = 2412, .end_freq = 2484, },
140 { .start_freq = 5180, .end_freq = 5320, },
141 { .start_freq = 5500, .end_freq = 5720, },
142 { .start_freq = 5745, .end_freq = 5825, },
143};
144
145static_assert(ARRAY_SIZE(rtw89_common_sar_subband_map) ==
146 ARRAY_SIZE(rtw89_common_sar_freq_ranges));
147
148const struct cfg80211_sar_capa rtw89_sar_capa = {
149 .type = NL80211_SAR_TYPE_POWER,
150 .num_freq_ranges = ARRAY_SIZE(rtw89_common_sar_freq_ranges),
151 .freq_ranges = rtw89_common_sar_freq_ranges,
152};
153
154int rtw89_ops_set_sar_specs(struct ieee80211_hw *hw,
155 const struct cfg80211_sar_specs *sar)
156{
157 struct rtw89_dev *rtwdev = hw->priv;
158 struct rtw89_sar_cfg_common sar_common = {0};
159 u8 fct;
160 u32 freq_start;
161 u32 freq_end;
162 u32 band;
163 s32 power;
164 u32 i, idx;
165
166 if (sar->type != NL80211_SAR_TYPE_POWER)
167 return -EINVAL;
168
169 fct = rtw89_sar_handlers[RTW89_SAR_SOURCE_COMMON].txpwr_factor_sar;
170
171 for (i = 0; i < sar->num_sub_specs; i++) {
172 idx = sar->sub_specs[i].freq_range_index;
173 if (idx >= ARRAY_SIZE(rtw89_common_sar_freq_ranges))
174 return -EINVAL;
175
176 freq_start = rtw89_common_sar_freq_ranges[idx].start_freq;
177 freq_end = rtw89_common_sar_freq_ranges[idx].end_freq;
178 band = rtw89_common_sar_subband_map[idx];
179 power = sar->sub_specs[i].power;
180
181 rtw89_info(rtwdev, "On freq %u to %u, ", freq_start, freq_end);
182 rtw89_info(rtwdev, "set SAR power limit %d (unit: 1/%lu dBm)\n",
183 power, BIT(fct));
184
185 sar_common.set[band] = true;
186 sar_common.cfg[band] = power;
187 }
188
189 return rtw89_apply_sar_common(rtwdev, &sar_common);
190}
191
