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