1/* 2 * Broadcom B43 wireless driver 3 * PPR (Power Per Rate) management 4 * 5 * Copyright (c) 2014 Rafał Miłecki <zajec5@gmail.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18#include "ppr.h" 19#include "b43.h" 20 21#define ppr_for_each_entry(ppr, i, entry) \ 22 for (i = 0, entry = &(ppr)->__all_rates[i]; \ 23 i < B43_PPR_RATES_NUM; \ 24 i++, entry++) 25 26void b43_ppr_clear(struct b43_wldev *dev, struct b43_ppr *ppr) 27{ 28 memset(ppr, 0, sizeof(*ppr)); 29 30 /* Compile-time PPR check */ 31 BUILD_BUG_ON(sizeof(struct b43_ppr) != B43_PPR_RATES_NUM * sizeof(u8)); 32} 33 34void b43_ppr_add(struct b43_wldev *dev, struct b43_ppr *ppr, int diff) 35{ 36 int i; 37 u8 *rate; 38 39 ppr_for_each_entry(ppr, i, rate) { 40 *rate = clamp_val(*rate + diff, 0, 127); 41 } 42} 43 44void b43_ppr_apply_max(struct b43_wldev *dev, struct b43_ppr *ppr, u8 max) 45{ 46 int i; 47 u8 *rate; 48 49 ppr_for_each_entry(ppr, i, rate) { 50 *rate = min(*rate, max); 51 } 52} 53 54void b43_ppr_apply_min(struct b43_wldev *dev, struct b43_ppr *ppr, u8 min) 55{ 56 int i; 57 u8 *rate; 58 59 ppr_for_each_entry(ppr, i, rate) { 60 *rate = max(*rate, min); 61 } 62} 63 64u8 b43_ppr_get_max(struct b43_wldev *dev, struct b43_ppr *ppr) 65{ 66 u8 res = 0; 67 int i; 68 u8 *rate; 69 70 ppr_for_each_entry(ppr, i, rate) { 71 res = max(*rate, res); 72 } 73 74 return res; 75} 76 77bool b43_ppr_load_max_from_sprom(struct b43_wldev *dev, struct b43_ppr *ppr, 78 enum b43_band band) 79{ 80 struct b43_ppr_rates *rates = &ppr->rates; 81 struct ssb_sprom *sprom = dev->dev->bus_sprom; 82 struct b43_phy *phy = &dev->phy; 83 u8 maxpwr, off; 84 u32 sprom_ofdm_po; 85 u16 *sprom_mcs_po; 86 u8 extra_cdd_po, extra_stbc_po; 87 int i; 88 89 switch (band) { 90 case B43_BAND_2G: 91 maxpwr = min(sprom->core_pwr_info[0].maxpwr_2g, 92 sprom->core_pwr_info[1].maxpwr_2g); 93 sprom_ofdm_po = sprom->ofdm2gpo; 94 sprom_mcs_po = sprom->mcs2gpo; 95 extra_cdd_po = (sprom->cddpo >> 0) & 0xf; 96 extra_stbc_po = (sprom->stbcpo >> 0) & 0xf; 97 break; 98 case B43_BAND_5G_LO: 99 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gl, 100 sprom->core_pwr_info[1].maxpwr_5gl); 101 sprom_ofdm_po = sprom->ofdm5glpo; 102 sprom_mcs_po = sprom->mcs5glpo; 103 extra_cdd_po = (sprom->cddpo >> 8) & 0xf; 104 extra_stbc_po = (sprom->stbcpo >> 8) & 0xf; 105 break; 106 case B43_BAND_5G_MI: 107 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5g, 108 sprom->core_pwr_info[1].maxpwr_5g); 109 sprom_ofdm_po = sprom->ofdm5gpo; 110 sprom_mcs_po = sprom->mcs5gpo; 111 extra_cdd_po = (sprom->cddpo >> 4) & 0xf; 112 extra_stbc_po = (sprom->stbcpo >> 4) & 0xf; 113 break; 114 case B43_BAND_5G_HI: 115 maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gh, 116 sprom->core_pwr_info[1].maxpwr_5gh); 117 sprom_ofdm_po = sprom->ofdm5ghpo; 118 sprom_mcs_po = sprom->mcs5ghpo; 119 extra_cdd_po = (sprom->cddpo >> 12) & 0xf; 120 extra_stbc_po = (sprom->stbcpo >> 12) & 0xf; 121 break; 122 default: 123 WARN_ON_ONCE(1); 124 return false; 125 } 126 127 if (band == B43_BAND_2G) { 128 for (i = 0; i < 4; i++) { 129 off = ((sprom->cck2gpo >> (i * 4)) & 0xf) * 2; 130 rates->cck[i] = maxpwr - off; 131 } 132 } 133 134 /* OFDM */ 135 for (i = 0; i < 8; i++) { 136 off = ((sprom_ofdm_po >> (i * 4)) & 0xf) * 2; 137 rates->ofdm[i] = maxpwr - off; 138 } 139 140 /* MCS 20 SISO */ 141 rates->mcs_20[0] = rates->ofdm[0]; 142 rates->mcs_20[1] = rates->ofdm[2]; 143 rates->mcs_20[2] = rates->ofdm[3]; 144 rates->mcs_20[3] = rates->ofdm[4]; 145 rates->mcs_20[4] = rates->ofdm[5]; 146 rates->mcs_20[5] = rates->ofdm[6]; 147 rates->mcs_20[6] = rates->ofdm[7]; 148 rates->mcs_20[7] = rates->ofdm[7]; 149 150 /* MCS 20 CDD */ 151 for (i = 0; i < 4; i++) { 152 off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; 153 rates->mcs_20_cdd[i] = maxpwr - off; 154 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 155 rates->mcs_20_cdd[i] -= extra_cdd_po; 156 } 157 for (i = 0; i < 4; i++) { 158 off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; 159 rates->mcs_20_cdd[4 + i] = maxpwr - off; 160 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 161 rates->mcs_20_cdd[4 + i] -= extra_cdd_po; 162 } 163 164 /* OFDM 20 CDD */ 165 rates->ofdm_20_cdd[0] = rates->mcs_20_cdd[0]; 166 rates->ofdm_20_cdd[1] = rates->mcs_20_cdd[0]; 167 rates->ofdm_20_cdd[2] = rates->mcs_20_cdd[1]; 168 rates->ofdm_20_cdd[3] = rates->mcs_20_cdd[2]; 169 rates->ofdm_20_cdd[4] = rates->mcs_20_cdd[3]; 170 rates->ofdm_20_cdd[5] = rates->mcs_20_cdd[4]; 171 rates->ofdm_20_cdd[6] = rates->mcs_20_cdd[5]; 172 rates->ofdm_20_cdd[7] = rates->mcs_20_cdd[6]; 173 174 /* MCS 20 STBC */ 175 for (i = 0; i < 4; i++) { 176 off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; 177 rates->mcs_20_stbc[i] = maxpwr - off; 178 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 179 rates->mcs_20_stbc[i] -= extra_stbc_po; 180 } 181 for (i = 0; i < 4; i++) { 182 off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; 183 rates->mcs_20_stbc[4 + i] = maxpwr - off; 184 if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) 185 rates->mcs_20_stbc[4 + i] -= extra_stbc_po; 186 } 187 188 /* MCS 20 SDM */ 189 for (i = 0; i < 4; i++) { 190 off = ((sprom_mcs_po[2] >> (i * 4)) & 0xf) * 2; 191 rates->mcs_20_sdm[i] = maxpwr - off; 192 } 193 for (i = 0; i < 4; i++) { 194 off = ((sprom_mcs_po[3] >> (i * 4)) & 0xf) * 2; 195 rates->mcs_20_sdm[4 + i] = maxpwr - off; 196 } 197 198 return true; 199} 200