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/*
* 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;
}
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