diff options
Diffstat (limited to 'drivers/net/wireless/b43/ppr.c')
| -rw-r--r-- | drivers/net/wireless/b43/ppr.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/ppr.c b/drivers/net/wireless/b43/ppr.c new file mode 100644 index 00000000000..9a770279c41 --- /dev/null +++ b/drivers/net/wireless/b43/ppr.c @@ -0,0 +1,199 @@ +/* + * Broadcom B43 wireless driver + * PPR (Power Per Rate) management + * + * Copyright (c) 2014 Rafał Miłecki <zajec5@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "ppr.h" +#include "b43.h" + +#define ppr_for_each_entry(ppr, i, entry) \ + for (i = 0, entry = &(ppr)->__all_rates[i]; \ + i < B43_PPR_RATES_NUM; \ + i++, entry++) + +void b43_ppr_clear(struct b43_wldev *dev, struct b43_ppr *ppr) +{ + memset(ppr, 0, sizeof(*ppr)); + + /* Compile-time PPR check */ + BUILD_BUG_ON(sizeof(struct b43_ppr) != B43_PPR_RATES_NUM * sizeof(u8)); +} + +void b43_ppr_add(struct b43_wldev *dev, struct b43_ppr *ppr, int diff) +{ + int i; + u8 *rate; + + ppr_for_each_entry(ppr, i, rate) { + *rate = clamp_val(*rate + diff, 0, 127); + } +} + +void b43_ppr_apply_max(struct b43_wldev *dev, struct b43_ppr *ppr, u8 max) +{ + int i; + u8 *rate; + + ppr_for_each_entry(ppr, i, rate) { + *rate = min(*rate, max); + } +} + +void b43_ppr_apply_min(struct b43_wldev *dev, struct b43_ppr *ppr, u8 min) +{ + int i; + u8 *rate; + + ppr_for_each_entry(ppr, i, rate) { + *rate = max(*rate, min); + } +} + +u8 b43_ppr_get_max(struct b43_wldev *dev, struct b43_ppr *ppr) +{ + u8 res = 0; + int i; + u8 *rate; + + ppr_for_each_entry(ppr, i, rate) { + res = max(*rate, res); + } + + return res; +} + +bool b43_ppr_load_max_from_sprom(struct b43_wldev *dev, struct b43_ppr *ppr, + enum b43_band band) +{ + struct b43_ppr_rates *rates = &ppr->rates; + struct ssb_sprom *sprom = dev->dev->bus_sprom; + struct b43_phy *phy = &dev->phy; + u8 maxpwr, off; + u32 sprom_ofdm_po; + u16 *sprom_mcs_po; + u8 extra_cdd_po, extra_stbc_po; + int i; + + switch (band) { + case B43_BAND_2G: + maxpwr = min(sprom->core_pwr_info[0].maxpwr_2g, + sprom->core_pwr_info[1].maxpwr_2g); + sprom_ofdm_po = sprom->ofdm2gpo; + sprom_mcs_po = sprom->mcs2gpo; + extra_cdd_po = (sprom->cddpo >> 0) & 0xf; + extra_stbc_po = (sprom->stbcpo >> 0) & 0xf; + break; + case B43_BAND_5G_LO: + maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gl, + sprom->core_pwr_info[1].maxpwr_5gl); + sprom_ofdm_po = sprom->ofdm5glpo; + sprom_mcs_po = sprom->mcs5glpo; + extra_cdd_po = (sprom->cddpo >> 8) & 0xf; + extra_stbc_po = (sprom->stbcpo >> 8) & 0xf; + break; + case B43_BAND_5G_MI: + maxpwr = min(sprom->core_pwr_info[0].maxpwr_5g, + sprom->core_pwr_info[1].maxpwr_5g); + sprom_ofdm_po = sprom->ofdm5gpo; + sprom_mcs_po = sprom->mcs5gpo; + extra_cdd_po = (sprom->cddpo >> 4) & 0xf; + extra_stbc_po = (sprom->stbcpo >> 4) & 0xf; + break; + case B43_BAND_5G_HI: + maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gh, + sprom->core_pwr_info[1].maxpwr_5gh); + sprom_ofdm_po = sprom->ofdm5ghpo; + sprom_mcs_po = sprom->mcs5ghpo; + extra_cdd_po = (sprom->cddpo >> 12) & 0xf; + extra_stbc_po = (sprom->stbcpo >> 12) & 0xf; + break; + default: + WARN_ON_ONCE(1); + return false; + } + + if (band == B43_BAND_2G) { + for (i = 0; i < 4; i++) { + off = ((sprom->cck2gpo >> (i * 4)) & 0xf) * 2; + rates->cck[i] = maxpwr - off; + } + } + + /* OFDM */ + for (i = 0; i < 8; i++) { + off = ((sprom_ofdm_po >> (i * 4)) & 0xf) * 2; + rates->ofdm[i] = maxpwr - off; + } + + /* MCS 20 SISO */ + rates->mcs_20[0] = rates->ofdm[0]; + rates->mcs_20[1] = rates->ofdm[2]; + rates->mcs_20[2] = rates->ofdm[3]; + rates->mcs_20[3] = rates->ofdm[4]; + rates->mcs_20[4] = rates->ofdm[5]; + rates->mcs_20[5] = rates->ofdm[6]; + rates->mcs_20[6] = rates->ofdm[7]; + rates->mcs_20[7] = rates->ofdm[7]; + + /* MCS 20 CDD */ + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_cdd[i] = maxpwr - off; + if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) + rates->mcs_20_cdd[i] -= extra_cdd_po; + } + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_cdd[4 + i] = maxpwr - off; + if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) + rates->mcs_20_cdd[4 + i] -= extra_cdd_po; + } + + /* OFDM 20 CDD */ + rates->ofdm_20_cdd[0] = rates->mcs_20_cdd[0]; + rates->ofdm_20_cdd[1] = rates->mcs_20_cdd[0]; + rates->ofdm_20_cdd[2] = rates->mcs_20_cdd[1]; + rates->ofdm_20_cdd[3] = rates->mcs_20_cdd[2]; + rates->ofdm_20_cdd[4] = rates->mcs_20_cdd[3]; + rates->ofdm_20_cdd[5] = rates->mcs_20_cdd[4]; + rates->ofdm_20_cdd[6] = rates->mcs_20_cdd[5]; + rates->ofdm_20_cdd[7] = rates->mcs_20_cdd[6]; + + /* MCS 20 STBC */ + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[0] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_stbc[i] = maxpwr - off; + if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) + rates->mcs_20_stbc[i] -= extra_stbc_po; + } + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[1] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_stbc[4 + i] = maxpwr - off; + if (phy->type == B43_PHYTYPE_N && phy->rev >= 3) + rates->mcs_20_stbc[4 + i] -= extra_stbc_po; + } + + /* MCS 20 SDM */ + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[2] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_sdm[i] = maxpwr - off; + } + for (i = 0; i < 4; i++) { + off = ((sprom_mcs_po[3] >> (i * 4)) & 0xf) * 2; + rates->mcs_20_sdm[4 + i] = maxpwr - off; + } + + return true; +} |