drivers/net/wireless/broadcom/b43/ppr.c

   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 }