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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Broadcom B43 wireless driver4 * PPR (Power Per Rate) management5 *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 17void 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 25void 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 35void 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 45void 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 55u8 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 68bool 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