// SPDX-License-Identifier: GPL-2.0-or-later /* * Broadcom B43 wireless driver * PPR (Power Per Rate) management * * Copyright (c) 2014 Rafał Miłecki <zajec5@gmail.com> */ #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; }