1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Broadcom B43 wireless driver 4 * PPR (Power Per Rate) management 5 * 6 * Copyright (c) 2014 Rafał Miłecki <zajec5@gmail.com> 7 */ 8 9 #include "ppr.h" 10 #include "b43.h" 11 12 #define ppr_for_each_entry(ppr, i, entry) \ 13 for (i = 0, entry = &(ppr)->__all_rates[i]; \ 14 i < B43_PPR_RATES_NUM; \ 15 i++, entry++) 16 17 void b43_ppr_clear(struct b43_wldev *dev, struct b43_ppr *ppr) 18 { 19 memset(ppr, 0, sizeof(*ppr)); 20 21 /* Compile-time PPR check */ 22 BUILD_BUG_ON(sizeof(struct b43_ppr) != B43_PPR_RATES_NUM * sizeof(u8)); 23 } 24 25 void b43_ppr_add(struct b43_wldev *dev, struct b43_ppr *ppr, int diff) 26 { 27 int i; 28 u8 *rate; 29 30 ppr_for_each_entry(ppr, i, rate) { 31 *rate = clamp_val(*rate + diff, 0, 127); 32 } 33 } 34 35 void b43_ppr_apply_max(struct b43_wldev *dev, struct b43_ppr *ppr, u8 max) 36 { 37 int i; 38 u8 *rate; 39 40 ppr_for_each_entry(ppr, i, rate) { 41 *rate = min(*rate, max); 42 } 43 } 44 45 void b43_ppr_apply_min(struct b43_wldev *dev, struct b43_ppr *ppr, u8 min) 46 { 47 int i; 48 u8 *rate; 49 50 ppr_for_each_entry(ppr, i, rate) { 51 *rate = max(*rate, min); 52 } 53 } 54 55 u8 b43_ppr_get_max(struct b43_wldev *dev, struct b43_ppr *ppr) 56 { 57 u8 res = 0; 58 int i; 59 u8 *rate; 60 61 ppr_for_each_entry(ppr, i, rate) { 62 res = max(*rate, res); 63 } 64 65 return res; 66 } 67 68 bool b43_ppr_load_max_from_sprom(struct b43_wldev *dev, struct b43_ppr *ppr, 69 enum b43_band band) 70 { 71 struct b43_ppr_rates *rates = &ppr->rates; 72 struct ssb_sprom *sprom = dev->dev->bus_sprom; 73 struct b43_phy *phy = &dev->phy; 74 u8 maxpwr, off; 75 u32 sprom_ofdm_po; 76 u16 *sprom_mcs_po; 77 u8 extra_cdd_po, extra_stbc_po; 78 int i; 79 80 switch (band) { 81 case B43_BAND_2G: 82 maxpwr = min(sprom->core_pwr_info[0].maxpwr_2g, 83 sprom->core_pwr_info[1].maxpwr_2g); 84 sprom_ofdm_po = sprom->ofdm2gpo; 85 sprom_mcs_po = sprom->mcs2gpo; 86 extra_cdd_po = (sprom->cddpo >> 0) & 0xf; 87 extra_stbc_po = (sprom->stbcpo >> 0) & 0xf; 88 break; 89 case B43_BAND_5G_LO: 90 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gl, 91 sprom->core_pwr_info[1].maxpwr_5gl); 92 sprom_ofdm_po = sprom->ofdm5glpo; 93 sprom_mcs_po = sprom->mcs5glpo; 94 extra_cdd_po = (sprom->cddpo >> 8) & 0xf; 95 extra_stbc_po = (sprom->stbcpo >> 8) & 0xf; 96 break; 97 case B43_BAND_5G_MI: 98 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5g, 99 sprom->core_pwr_info[1].maxpwr_5g); 100 sprom_ofdm_po = sprom->ofdm5gpo; 101 sprom_mcs_po = sprom->mcs5gpo; 102 extra_cdd_po = (sprom->cddpo >> 4) & 0xf; 103 extra_stbc_po = (sprom->stbcpo >> 4) & 0xf; 104 break; 105 case B43_BAND_5G_HI: 106 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gh, 107 sprom->core_pwr_info[1].maxpwr_5gh); 108 sprom_ofdm_po = sprom->ofdm5ghpo; 109 sprom_mcs_po = sprom->mcs5ghpo; 110 extra_cdd_po = (sprom->cddpo >> 12) & 0xf; 111 extra_stbc_po = (sprom->stbcpo >> 12) & 0xf; 112 break; 113 default: 114 WARN_ON_ONCE(1); 115 return false; 116 } 117 118 if (band == B43_BAND_2G) { 119 for (i = 0; i < 4; i++) { 120 off = ((sprom->cck2gpo >> (i * 4)) & 0xf) * 2; 121 rates->cck[i] = maxpwr - off; 122 } 123 } 124 125 /* OFDM */ 126 for (i = 0; i < 8; i++) { 127 off = ((sprom_ofdm_po >> (i * 4)) & 0xf) * 2; 128 rates->ofdm[i] = maxpwr - off; 129 } 130 131 /* MCS 20 SISO */ 132 rates->mcs_20[0] = rates->ofdm[0]; 133 rates->mcs_20[1] = rates->ofdm[2]; 134 rates->mcs_20[2] = rates->ofdm[3]; 135 rates->mcs_20[3] = rates->ofdm[4]; 136 rates->mcs_20[4] = rates->ofdm[5]; 137 rates->mcs_20[5] = rates->ofdm[6]; 138 rates->mcs_20[6] = rates->ofdm[7]; 139 rates->mcs_20[7] = rates->ofdm[7]; 140 141 /* MCS 20 CDD */ 142 for (i = 0; i < 4; i++) { 143 off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; 144 rates->mcs_20_cdd[i] = maxpwr - off; 145 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 146 rates->mcs_20_cdd[i] -= extra_cdd_po; 147 } 148 for (i = 0; i < 4; i++) { 149 off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; 150 rates->mcs_20_cdd[4 + i] = maxpwr - off; 151 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 152 rates->mcs_20_cdd[4 + i] -= extra_cdd_po; 153 } 154 155 /* OFDM 20 CDD */ 156 rates->ofdm_20_cdd[0] = rates->mcs_20_cdd[0]; 157 rates->ofdm_20_cdd[1] = rates->mcs_20_cdd[0]; 158 rates->ofdm_20_cdd[2] = rates->mcs_20_cdd[1]; 159 rates->ofdm_20_cdd[3] = rates->mcs_20_cdd[2]; 160 rates->ofdm_20_cdd[4] = rates->mcs_20_cdd[3]; 161 rates->ofdm_20_cdd[5] = rates->mcs_20_cdd[4]; 162 rates->ofdm_20_cdd[6] = rates->mcs_20_cdd[5]; 163 rates->ofdm_20_cdd[7] = rates->mcs_20_cdd[6]; 164 165 /* MCS 20 STBC */ 166 for (i = 0; i < 4; i++) { 167 off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; 168 rates->mcs_20_stbc[i] = maxpwr - off; 169 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 170 rates->mcs_20_stbc[i] -= extra_stbc_po; 171 } 172 for (i = 0; i < 4; i++) { 173 off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; 174 rates->mcs_20_stbc[4 + i] = maxpwr - off; 175 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 176 rates->mcs_20_stbc[4 + i] -= extra_stbc_po; 177 } 178 179 /* MCS 20 SDM */ 180 for (i = 0; i < 4; i++) { 181 off = ((sprom_mcs_po[2] >> (i * 4)) & 0xf) * 2; 182 rates->mcs_20_sdm[i] = maxpwr - off; 183 } 184 for (i = 0; i < 4; i++) { 185 off = ((sprom_mcs_po[3] >> (i * 4)) & 0xf) * 2; 186 rates->mcs_20_sdm[4 + i] = maxpwr - off; 187 } 188 189 return true; 190 } 191