1
2
3
4
5#include "sar.h"
6#include "phy.h"
7#include "debug.h"
8
9s8 rtw_query_sar(struct rtw_dev *rtwdev, const struct rtw_sar_arg *arg)
10{
11 const struct rtw_hal *hal = &rtwdev->hal;
12 const struct rtw_sar *sar = &hal->sar;
13
14 switch (sar->src) {
15 default:
16 rtw_warn(rtwdev, "unknown SAR source: %d\n", sar->src);
17 fallthrough;
18 case RTW_SAR_SOURCE_NONE:
19 return (s8)rtwdev->chip->max_power_index;
20 case RTW_SAR_SOURCE_COMMON:
21 return sar->cfg[arg->path][arg->rs].common[arg->sar_band];
22 }
23}
24
25static int rtw_apply_sar(struct rtw_dev *rtwdev, const struct rtw_sar *new)
26{
27 struct rtw_hal *hal = &rtwdev->hal;
28 struct rtw_sar *sar = &hal->sar;
29
30 if (sar->src != RTW_SAR_SOURCE_NONE && new->src != sar->src) {
31 rtw_warn(rtwdev, "SAR source: %d is in use\n", sar->src);
32 return -EBUSY;
33 }
34
35 *sar = *new;
36 rtw_phy_set_tx_power_level(rtwdev, hal->current_channel);
37
38 return 0;
39}
40
41static s8 rtw_sar_to_phy(struct rtw_dev *rtwdev, u8 fct, s32 sar,
42 const struct rtw_sar_arg *arg)
43{
44 struct rtw_hal *hal = &rtwdev->hal;
45 u8 txgi = rtwdev->chip->txgi_factor;
46 u8 max = rtwdev->chip->max_power_index;
47 s32 tmp;
48 s8 base;
49
50 tmp = fct > txgi ? sar >> (fct - txgi) : sar << (txgi - fct);
51 base = arg->sar_band == RTW_SAR_BAND_0 ?
52 hal->tx_pwr_by_rate_base_2g[arg->path][arg->rs] :
53 hal->tx_pwr_by_rate_base_5g[arg->path][arg->rs];
54
55 return (s8)clamp_t(s32, tmp, -max - 1, max) - base;
56}
57
58static const struct cfg80211_sar_freq_ranges rtw_common_sar_freq_ranges[] = {
59 [RTW_SAR_BAND_0] = { .start_freq = 2412, .end_freq = 2484, },
60 [RTW_SAR_BAND_1] = { .start_freq = 5180, .end_freq = 5320, },
61 [RTW_SAR_BAND_3] = { .start_freq = 5500, .end_freq = 5720, },
62 [RTW_SAR_BAND_4] = { .start_freq = 5745, .end_freq = 5825, },
63};
64
65static_assert(ARRAY_SIZE(rtw_common_sar_freq_ranges) == RTW_SAR_BAND_NR);
66
67const struct cfg80211_sar_capa rtw_sar_capa = {
68 .type = NL80211_SAR_TYPE_POWER,
69 .num_freq_ranges = RTW_SAR_BAND_NR,
70 .freq_ranges = rtw_common_sar_freq_ranges,
71};
72
73int rtw_set_sar_specs(struct rtw_dev *rtwdev,
74 const struct cfg80211_sar_specs *sar)
75{
76 struct rtw_sar_arg arg = {0};
77 struct rtw_sar new = {0};
78 u32 idx, i, j, k;
79 s32 power;
80 s8 val;
81
82 if (sar->type != NL80211_SAR_TYPE_POWER)
83 return -EINVAL;
84
85 memset(&new, rtwdev->chip->max_power_index, sizeof(new));
86 new.src = RTW_SAR_SOURCE_COMMON;
87
88 for (i = 0; i < sar->num_sub_specs; i++) {
89 idx = sar->sub_specs[i].freq_range_index;
90 if (idx >= RTW_SAR_BAND_NR)
91 return -EINVAL;
92
93 power = sar->sub_specs[i].power;
94 rtw_dbg(rtwdev, RTW_DBG_REGD, "On freq %u to %u, set SAR %d in 1/%lu dBm\n",
95 rtw_common_sar_freq_ranges[idx].start_freq,
96 rtw_common_sar_freq_ranges[idx].end_freq,
97 power, BIT(RTW_COMMON_SAR_FCT));
98
99 for (j = 0; j < RTW_RF_PATH_MAX; j++) {
100 for (k = 0; k < RTW_RATE_SECTION_MAX; k++) {
101 arg = (struct rtw_sar_arg){
102 .sar_band = idx,
103 .path = j,
104 .rs = k,
105 };
106 val = rtw_sar_to_phy(rtwdev, RTW_COMMON_SAR_FCT,
107 power, &arg);
108 new.cfg[j][k].common[idx] = val;
109 }
110 }
111 }
112
113 return rtw_apply_sar(rtwdev, &new);
114}
115
