// SPDX-License-Identifier: GPL-2.0-only /* * (c) Copyright 2002-2010, Ralink Technology, Inc. * Copyright (C) 2014 Felix Fietkau * Copyright (C) 2015 Jakub Kicinski * Copyright (C) 2018 Stanislaw Gruszka */ #include #include #include "mt76x0.h" #include "mcu.h" #include "eeprom.h" #include "phy.h" #include "initvals.h" #include "initvals_phy.h" #include "../mt76x02_phy.h" static int mt76x0_rf_csr_wr(struct mt76x02_dev *dev, u32 offset, u8 value) { int ret = 0; u8 bank, reg; if (test_bit(MT76_REMOVED, &dev->mt76.state)) return -ENODEV; bank = MT_RF_BANK(offset); reg = MT_RF_REG(offset); if (WARN_ON_ONCE(reg > 127) || WARN_ON_ONCE(bank > 8)) return -EINVAL; mutex_lock(&dev->phy_mutex); if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100)) { ret = -ETIMEDOUT; goto out; } mt76_wr(dev, MT_RF_CSR_CFG, FIELD_PREP(MT_RF_CSR_CFG_DATA, value) | FIELD_PREP(MT_RF_CSR_CFG_REG_BANK, bank) | FIELD_PREP(MT_RF_CSR_CFG_REG_ID, reg) | MT_RF_CSR_CFG_WR | MT_RF_CSR_CFG_KICK); out: mutex_unlock(&dev->phy_mutex); if (ret < 0) dev_err(dev->mt76.dev, "Error: RF write %d:%d failed:%d!!\n", bank, reg, ret); return ret; } static int mt76x0_rf_csr_rr(struct mt76x02_dev *dev, u32 offset) { int ret = -ETIMEDOUT; u32 val; u8 bank, reg; if (test_bit(MT76_REMOVED, &dev->mt76.state)) return -ENODEV; bank = MT_RF_BANK(offset); reg = MT_RF_REG(offset); if (WARN_ON_ONCE(reg > 127) || WARN_ON_ONCE(bank > 8)) return -EINVAL; mutex_lock(&dev->phy_mutex); if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100)) goto out; mt76_wr(dev, MT_RF_CSR_CFG, FIELD_PREP(MT_RF_CSR_CFG_REG_BANK, bank) | FIELD_PREP(MT_RF_CSR_CFG_REG_ID, reg) | MT_RF_CSR_CFG_KICK); if (!mt76_poll(dev, MT_RF_CSR_CFG, MT_RF_CSR_CFG_KICK, 0, 100)) goto out; val = mt76_rr(dev, MT_RF_CSR_CFG); if (FIELD_GET(MT_RF_CSR_CFG_REG_ID, val) == reg && FIELD_GET(MT_RF_CSR_CFG_REG_BANK, val) == bank) ret = FIELD_GET(MT_RF_CSR_CFG_DATA, val); out: mutex_unlock(&dev->phy_mutex); if (ret < 0) dev_err(dev->mt76.dev, "Error: RF read %d:%d failed:%d!!\n", bank, reg, ret); return ret; } static int mt76x0_rf_wr(struct mt76x02_dev *dev, u32 offset, u8 val) { if (mt76_is_usb(dev)) { struct mt76_reg_pair pair = { .reg = offset, .value = val, }; WARN_ON_ONCE(!test_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state)); return mt76_wr_rp(dev, MT_MCU_MEMMAP_RF, &pair, 1); } else { return mt76x0_rf_csr_wr(dev, offset, val); } } static int mt76x0_rf_rr(struct mt76x02_dev *dev, u32 offset) { int ret; u32 val; if (mt76_is_usb(dev)) { struct mt76_reg_pair pair = { .reg = offset, }; WARN_ON_ONCE(!test_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state)); ret = mt76_rd_rp(dev, MT_MCU_MEMMAP_RF, &pair, 1); val = pair.value; } else { ret = val = mt76x0_rf_csr_rr(dev, offset); } return (ret < 0) ? ret : val; } static int mt76x0_rf_rmw(struct mt76x02_dev *dev, u32 offset, u8 mask, u8 val) { int ret; ret = mt76x0_rf_rr(dev, offset); if (ret < 0) return ret; val |= ret & ~mask; ret = mt76x0_rf_wr(dev, offset, val); return ret ? ret : val; } static int mt76x0_rf_set(struct mt76x02_dev *dev, u32 offset, u8 val) { return mt76x0_rf_rmw(dev, offset, 0, val); } static int mt76x0_rf_clear(struct mt76x02_dev *dev, u32 offset, u8 mask) { return mt76x0_rf_rmw(dev, offset, mask, 0); } static void mt76x0_phy_rf_csr_wr_rp(struct mt76x02_dev *dev, const struct mt76_reg_pair *data, int n) { while (n-- > 0) { mt76x0_rf_csr_wr(dev, data->reg, data->value); data++; } } #define RF_RANDOM_WRITE(dev, tab) do { \ if (mt76_is_mmio(dev)) \ mt76x0_phy_rf_csr_wr_rp(dev, tab, ARRAY_SIZE(tab)); \ else \ mt76_wr_rp(dev, MT_MCU_MEMMAP_RF, tab, ARRAY_SIZE(tab));\ } while (0) int mt76x0_phy_wait_bbp_ready(struct mt76x02_dev *dev) { int i = 20; u32 val; do { val = mt76_rr(dev, MT_BBP(CORE, 0)); if (val && ~val) break; } while (--i); if (!i) { dev_err(dev->mt76.dev, "Error: BBP is not ready\n"); return -EIO; } dev_dbg(dev->mt76.dev, "BBP version %08x\n", val); return 0; } static void mt76x0_phy_set_band(struct mt76x02_dev *dev, enum nl80211_band band) { switch (band) { case NL80211_BAND_2GHZ: RF_RANDOM_WRITE(dev, mt76x0_rf_2g_channel_0_tab); mt76x0_rf_wr(dev, MT_RF(5, 0), 0x45); mt76x0_rf_wr(dev, MT_RF(6, 0), 0x44); mt76_wr(dev, MT_TX_ALC_VGA3, 0x00050007); mt76_wr(dev, MT_TX0_RF_GAIN_CORR, 0x003E0002); break; case NL80211_BAND_5GHZ: RF_RANDOM_WRITE(dev, mt76x0_rf_5g_channel_0_tab); mt76x0_rf_wr(dev, MT_RF(5, 0), 0x44); mt76x0_rf_wr(dev, MT_RF(6, 0), 0x45); mt76_wr(dev, MT_TX_ALC_VGA3, 0x00000005); mt76_wr(dev, MT_TX0_RF_GAIN_CORR, 0x01010102); break; default: break; } } static void mt76x0_phy_set_chan_rf_params(struct mt76x02_dev *dev, u8 channel, u16 rf_bw_band) { const struct mt76x0_freq_item *freq_item; u16 rf_band = rf_bw_band & 0xff00; u16 rf_bw = rf_bw_band & 0x00ff; enum nl80211_band band; bool b_sdm = false; u32 mac_reg; int i; for (i = 0; i < ARRAY_SIZE(mt76x0_sdm_channel); i++) { if (channel == mt76x0_sdm_channel[i]) { b_sdm = true; break; } } for (i = 0; i < ARRAY_SIZE(mt76x0_frequency_plan); i++) { if (channel == mt76x0_frequency_plan[i].channel) { rf_band = mt76x0_frequency_plan[i].band; if (b_sdm) freq_item = &mt76x0_sdm_frequency_plan[i]; else freq_item = &mt76x0_frequency_plan[i]; mt76x0_rf_wr(dev, MT_RF(0, 37), freq_item->pllR37); mt76x0_rf_wr(dev, MT_RF(0, 36), freq_item->pllR36); mt76x0_rf_wr(dev, MT_RF(0, 35), freq_item->pllR35); mt76x0_rf_wr(dev, MT_RF(0, 34), freq_item->pllR34); mt76x0_rf_wr(dev, MT_RF(0, 33), freq_item->pllR33); mt76x0_rf_rmw(dev, MT_RF(0, 32), 0xe0, freq_item->pllR32_b7b5); /* R32<4:0> pll_den: (Denomina - 8) */ mt76x0_rf_rmw(dev, MT_RF(0, 32), MT_RF_PLL_DEN_MASK, freq_item->pllR32_b4b0); /* R31<7:5> */ mt76x0_rf_rmw(dev, MT_RF(0, 31), 0xe0, freq_item->pllR31_b7b5); /* R31<4:0> pll_k(Nominator) */ mt76x0_rf_rmw(dev, MT_RF(0, 31), MT_RF_PLL_K_MASK, freq_item->pllR31_b4b0); /* R30<7> sdm_reset_n */ if (b_sdm) { mt76x0_rf_clear(dev, MT_RF(0, 30), MT_RF_SDM_RESET_MASK); mt76x0_rf_set(dev, MT_RF(0, 30), MT_RF_SDM_RESET_MASK); } else { mt76x0_rf_rmw(dev, MT_RF(0, 30), MT_RF_SDM_RESET_MASK, freq_item->pllR30_b7); } /* R30<6:2> sdmmash_prbs,sin */ mt76x0_rf_rmw(dev, MT_RF(0, 30), MT_RF_SDM_MASH_PRBS_MASK, freq_item->pllR30_b6b2); /* R30<1> sdm_bp */ mt76x0_rf_rmw(dev, MT_RF(0, 30), MT_RF_SDM_BP_MASK, freq_item->pllR30_b1 << 1); /* R30<0> R29<7:0> (hex) pll_n */ mt76x0_rf_wr(dev, MT_RF(0, 29), freq_item->pll_n & 0xff); mt76x0_rf_rmw(dev, MT_RF(0, 30), 0x1, (freq_item->pll_n >> 8) & 0x1); /* R28<7:6> isi_iso */ mt76x0_rf_rmw(dev, MT_RF(0, 28), MT_RF_ISI_ISO_MASK, freq_item->pllR28_b7b6); /* R28<5:4> pfd_dly */ mt76x0_rf_rmw(dev, MT_RF(0, 28), MT_RF_PFD_DLY_MASK, freq_item->pllR28_b5b4); /* R28<3:2> clksel option */ mt76x0_rf_rmw(dev, MT_RF(0, 28), MT_RF_CLK_SEL_MASK, freq_item->pllR28_b3b2); /* R28<1:0> R27<7:0> R26<7:0> (hex) sdm_k */ mt76x0_rf_wr(dev, MT_RF(0, 26), freq_item->pll_sdm_k & 0xff); mt76x0_rf_wr(dev, MT_RF(0, 27), (freq_item->pll_sdm_k >> 8) & 0xff); mt76x0_rf_rmw(dev, MT_RF(0, 28), 0x3, (freq_item->pll_sdm_k >> 16) & 0x3); /* R24<1:0> xo_div */ mt76x0_rf_rmw(dev, MT_RF(0, 24), MT_RF_XO_DIV_MASK, freq_item->pllR24_b1b0); break; } } for (i = 0; i < ARRAY_SIZE(mt76x0_rf_bw_switch_tab); i++) { if (rf_bw == mt76x0_rf_bw_switch_tab[i].bw_band) { mt76x0_rf_wr(dev, mt76x0_rf_bw_switch_tab[i].rf_bank_reg, mt76x0_rf_bw_switch_tab[i].value); } else if ((rf_bw == (mt76x0_rf_bw_switch_tab[i].bw_band & 0xFF)) && (rf_band & mt76x0_rf_bw_switch_tab[i].bw_band)) { mt76x0_rf_wr(dev, mt76x0_rf_bw_switch_tab[i].rf_bank_reg, mt76x0_rf_bw_switch_tab[i].value); } } for (i = 0; i < ARRAY_SIZE(mt76x0_rf_band_switch_tab); i++) { if (mt76x0_rf_band_switch_tab[i].bw_band & rf_band) { mt76x0_rf_wr(dev, mt76x0_rf_band_switch_tab[i].rf_bank_reg, mt76x0_rf_band_switch_tab[i].value); } } mt76_clear(dev, MT_RF_MISC, 0xc); band = (rf_band & RF_G_BAND) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; if (mt76x02_ext_pa_enabled(dev, band)) { /* MT_RF_MISC (offset: 0x0518) * [2]1'b1: enable external A band PA * 1'b0: disable external A band PA * [3]1'b1: enable external G band PA * 1'b0: disable external G band PA */ if (rf_band & RF_A_BAND) mt76_set(dev, MT_RF_MISC, BIT(2)); else mt76_set(dev, MT_RF_MISC, BIT(3)); /* External PA */ for (i = 0; i < ARRAY_SIZE(mt76x0_rf_ext_pa_tab); i++) if (mt76x0_rf_ext_pa_tab[i].bw_band & rf_band) mt76x0_rf_wr(dev, mt76x0_rf_ext_pa_tab[i].rf_bank_reg, mt76x0_rf_ext_pa_tab[i].value); } if (rf_band & RF_G_BAND) { mt76_wr(dev, MT_TX0_RF_GAIN_ATTEN, 0x63707400); /* Set Atten mode = 2 For G band, Disable Tx Inc dcoc. */ mac_reg = mt76_rr(dev, MT_TX_ALC_CFG_1); mac_reg &= 0x896400FF; mt76_wr(dev, MT_TX_ALC_CFG_1, mac_reg); } else { mt76_wr(dev, MT_TX0_RF_GAIN_ATTEN, 0x686A7800); /* Set Atten mode = 0 * For Ext A band, Disable Tx Inc dcoc Cal. */ mac_reg = mt76_rr(dev, MT_TX_ALC_CFG_1); mac_reg &= 0x890400FF; mt76_wr(dev, MT_TX_ALC_CFG_1, mac_reg); } } static void mt76x0_phy_set_chan_bbp_params(struct mt76x02_dev *dev, u16 rf_bw_band) { int i; for (i = 0; i < ARRAY_SIZE(mt76x0_bbp_switch_tab); i++) { const struct mt76x0_bbp_switch_item *item = &mt76x0_bbp_switch_tab[i]; const struct mt76_reg_pair *pair = &item->reg_pair; if ((rf_bw_band & item->bw_band) != rf_bw_band) continue; if (pair->reg == MT_BBP(AGC, 8)) { u32 val = pair->value; u8 gain; gain = FIELD_GET(MT_BBP_AGC_GAIN, val); gain -= dev->cal.rx.lna_gain * 2; val &= ~MT_BBP_AGC_GAIN; val |= FIELD_PREP(MT_BBP_AGC_GAIN, gain); mt76_wr(dev, pair->reg, val); } else { mt76_wr(dev, pair->reg, pair->value); } } } static void mt76x0_phy_ant_select(struct mt76x02_dev *dev) { u16 ee_ant = mt76x02_eeprom_get(dev, MT_EE_ANTENNA); u16 ee_cfg1 = mt76x02_eeprom_get(dev, MT_EE_CFG1_INIT); u16 nic_conf2 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_2); u32 wlan, coex3; bool ant_div; wlan = mt76_rr(dev, MT_WLAN_FUN_CTRL); coex3 = mt76_rr(dev, MT_COEXCFG3); ee_ant &= ~(BIT(14) | BIT(12)); wlan &= ~(BIT(6) | BIT(5)); coex3 &= ~GENMASK(5, 2); if (ee_ant & MT_EE_ANTENNA_DUAL) { /* dual antenna mode */ ant_div = !(nic_conf2 & MT_EE_NIC_CONF_2_ANT_OPT) && (nic_conf2 & MT_EE_NIC_CONF_2_ANT_DIV); if (ant_div) ee_ant |= BIT(12); else coex3 |= BIT(4); coex3 |= BIT(3); if (dev->mt76.cap.has_2ghz) wlan |= BIT(6); } else { /* sigle antenna mode */ if (dev->mt76.cap.has_5ghz) { coex3 |= BIT(3) | BIT(4); } else { wlan |= BIT(6); coex3 |= BIT(1); } } if (is_mt7630(dev)) ee_ant |= BIT(14) | BIT(11); mt76_wr(dev, MT_WLAN_FUN_CTRL, wlan); mt76_rmw(dev, MT_CMB_CTRL, GENMASK(15, 0), ee_ant); mt76_rmw(dev, MT_CSR_EE_CFG1, GENMASK(15, 0), ee_cfg1); mt76_clear(dev, MT_COEXCFG0, BIT(2)); mt76_wr(dev, MT_COEXCFG3, coex3); } static void mt76x0_phy_bbp_set_bw(struct mt76x02_dev *dev, enum nl80211_chan_width width) { enum { BW_20 = 0, BW_40 = 1, BW_80 = 2, BW_10 = 4}; int bw; switch (width) { default: case NL80211_CHAN_WIDTH_20_NOHT: case NL80211_CHAN_WIDTH_20: bw = BW_20; break; case NL80211_CHAN_WIDTH_40: bw = BW_40; break; case NL80211_CHAN_WIDTH_80: bw = BW_80; break; case NL80211_CHAN_WIDTH_10: bw = BW_10; break; case NL80211_CHAN_WIDTH_80P80: case NL80211_CHAN_WIDTH_160: case NL80211_CHAN_WIDTH_5: /* TODO error */ return; } mt76x02_mcu_function_select(dev, BW_SETTING, bw); } static void mt76x0_phy_tssi_dc_calibrate(struct mt76x02_dev *dev) { struct ieee80211_channel *chan = dev->mt76.chandef.chan; u32 val; if (chan->band == NL80211_BAND_5GHZ) mt76x0_rf_clear(dev, MT_RF(0, 67), 0xf); /* bypass ADDA control */ mt76_wr(dev, MT_RF_SETTING_0, 0x60002237); mt76_wr(dev, MT_RF_BYPASS_0, 0xffffffff); /* bbp sw reset */ mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); usleep_range(500, 1000); mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); val = (chan->band == NL80211_BAND_5GHZ) ? 0x80055 : 0x80050; mt76_wr(dev, MT_BBP(CORE, 34), val); /* enable TX with DAC0 input */ mt76_wr(dev, MT_BBP(TXBE, 6), BIT(31)); mt76_poll_msec(dev, MT_BBP(CORE, 34), BIT(4), 0, 200); dev->cal.tssi_dc = mt76_rr(dev, MT_BBP(CORE, 35)) & 0xff; /* stop bypass ADDA */ mt76_wr(dev, MT_RF_BYPASS_0, 0); /* stop TX */ mt76_wr(dev, MT_BBP(TXBE, 6), 0); /* bbp sw reset */ mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); usleep_range(500, 1000); mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); if (chan->band == NL80211_BAND_5GHZ) mt76x0_rf_rmw(dev, MT_RF(0, 67), 0xf, 0x4); } static int mt76x0_phy_tssi_adc_calibrate(struct mt76x02_dev *dev, s16 *ltssi, u8 *info) { struct ieee80211_channel *chan = dev->mt76.chandef.chan; u32 val; val = (chan->band == NL80211_BAND_5GHZ) ? 0x80055 : 0x80050; mt76_wr(dev, MT_BBP(CORE, 34), val); if (!mt76_poll_msec(dev, MT_BBP(CORE, 34), BIT(4), 0, 200)) { mt76_clear(dev, MT_BBP(CORE, 34), BIT(4)); return -ETIMEDOUT; } *ltssi = mt76_rr(dev, MT_BBP(CORE, 35)) & 0xff; if (chan->band == NL80211_BAND_5GHZ) *ltssi += 128; /* set packet info#1 mode */ mt76_wr(dev, MT_BBP(CORE, 34), 0x80041); info[0] = mt76_rr(dev, MT_BBP(CORE, 35)) & 0xff; /* set packet info#2 mode */ mt76_wr(dev, MT_BBP(CORE, 34), 0x80042); info[1] = mt76_rr(dev, MT_BBP(CORE, 35)) & 0xff; /* set packet info#3 mode */ mt76_wr(dev, MT_BBP(CORE, 34), 0x80043); info[2] = mt76_rr(dev, MT_BBP(CORE, 35)) & 0xff; return 0; } static u8 mt76x0_phy_get_rf_pa_mode(struct mt76x02_dev *dev, int index, u8 tx_rate) { u32 val, reg; reg = (index == 1) ? MT_RF_PA_MODE_CFG1 : MT_RF_PA_MODE_CFG0; val = mt76_rr(dev, reg); return (val & (3 << (tx_rate * 2))) >> (tx_rate * 2); } static int mt76x0_phy_get_target_power(struct mt76x02_dev *dev, u8 tx_mode, u8 *info, s8 *target_power, s8 *target_pa_power) { u8 tx_rate, cur_power; cur_power = mt76_rr(dev, MT_TX_ALC_CFG_0) & MT_TX_ALC_CFG_0_CH_INIT_0; switch (tx_mode) { case 0: /* cck rates */ tx_rate = (info[0] & 0x60) >> 5; if (tx_rate > 3) return -EINVAL; *target_power = cur_power + dev->mt76.rate_power.cck[tx_rate]; *target_pa_power = mt76x0_phy_get_rf_pa_mode(dev, 0, tx_rate); break; case 1: { u8 index; /* ofdm rates */ tx_rate = (info[0] & 0xf0) >> 4; switch (tx_rate) { case 0xb: index = 0; break; case 0xf: index = 1; break; case 0xa: index = 2; break; case 0xe: index = 3; break; case 0x9: index = 4; break; case 0xd: index = 5; break; case 0x8: index = 6; break; case 0xc: index = 7; break; default: return -EINVAL; } *target_power = cur_power + dev->mt76.rate_power.ofdm[index]; *target_pa_power = mt76x0_phy_get_rf_pa_mode(dev, 0, index + 4); break; } case 4: /* vht rates */ tx_rate = info[1] & 0xf; if (tx_rate > 9) return -EINVAL; *target_power = cur_power + dev->mt76.rate_power.vht[tx_rate]; *target_pa_power = mt76x0_phy_get_rf_pa_mode(dev, 1, tx_rate); break; default: /* ht rates */ tx_rate = info[1] & 0x7f; if (tx_rate > 9) return -EINVAL; *target_power = cur_power + dev->mt76.rate_power.ht[tx_rate]; *target_pa_power = mt76x0_phy_get_rf_pa_mode(dev, 1, tx_rate); break; } return 0; } static s16 mt76x0_phy_lin2db(u16 val) { u32 mantissa = val << 4; int ret, data; s16 exp = -4; while (mantissa < BIT(15)) { mantissa <<= 1; if (--exp < -20) return -10000; } while (mantissa > 0xffff) { mantissa >>= 1; if (++exp > 20) return -10000; } /* s(15,0) */ if (mantissa <= 47104) data = mantissa + (mantissa >> 3) + (mantissa >> 4) - 38400; else data = mantissa - (mantissa >> 3) - (mantissa >> 6) - 23040; data = max_t(int, 0, data); ret = ((15 + exp) << 15) + data; ret = (ret << 2) + (ret << 1) + (ret >> 6) + (ret >> 7); return ret >> 10; } static int mt76x0_phy_get_delta_power(struct mt76x02_dev *dev, u8 tx_mode, s8 target_power, s8 target_pa_power, s16 ltssi) { struct ieee80211_channel *chan = dev->mt76.chandef.chan; int tssi_target = target_power << 12, tssi_slope; int tssi_offset, tssi_db, ret; u32 data; u16 val; if (chan->band == NL80211_BAND_5GHZ) { u8 bound[7]; int i, err; err = mt76x02_eeprom_copy(dev, MT_EE_TSSI_BOUND1, bound, sizeof(bound)); if (err < 0) return err; for (i = 0; i < ARRAY_SIZE(bound); i++) { if (chan->hw_value <= bound[i] || !bound[i]) break; } val = mt76x02_eeprom_get(dev, MT_EE_TSSI_SLOPE_5G + i * 2); tssi_offset = val >> 8; if ((tssi_offset >= 64 && tssi_offset <= 127) || (tssi_offset & BIT(7))) tssi_offset -= BIT(8); } else { val = mt76x02_eeprom_get(dev, MT_EE_TSSI_SLOPE_2G); tssi_offset = val >> 8; if (tssi_offset & BIT(7)) tssi_offset -= BIT(8); } tssi_slope = val & 0xff; switch (target_pa_power) { case 1: if (chan->band == NL80211_BAND_2GHZ) tssi_target += 29491; /* 3.6 * 8192 */ /* fall through */ case 0: break; default: tssi_target += 4424; /* 0.54 * 8192 */ break; } if (!tx_mode) { data = mt76_rr(dev, MT_BBP(CORE, 1)); if (is_mt7630(dev) && mt76_is_mmio(dev)) { int offset; /* 2.3 * 8192 or 1.5 * 8192 */ offset = (data & BIT(5)) ? 18841 : 12288; tssi_target += offset; } else if (data & BIT(5)) { /* 0.8 * 8192 */ tssi_target += 6554; } } data = mt76_rr(dev, MT_BBP(TXBE, 4)); switch (data & 0x3) { case 1: tssi_target -= 49152; /* -6db * 8192 */ break; case 2: tssi_target -= 98304; /* -12db * 8192 */ break; case 3: tssi_target += 49152; /* 6db * 8192 */ break; default: break; } tssi_db = mt76x0_phy_lin2db(ltssi - dev->cal.tssi_dc) * tssi_slope; if (chan->band == NL80211_BAND_5GHZ) { tssi_db += ((tssi_offset - 50) << 10); /* offset s4.3 */ tssi_target -= tssi_db; if (ltssi > 254 && tssi_target > 0) { /* upper saturate */ tssi_target = 0; } } else { tssi_db += (tssi_offset << 9); /* offset s3.4 */ tssi_target -= tssi_db; /* upper-lower saturate */ if ((ltssi > 126 && tssi_target > 0) || ((ltssi - dev->cal.tssi_dc) < 1 && tssi_target < 0)) { tssi_target = 0; } } if ((dev->cal.tssi_target ^ tssi_target) < 0 && dev->cal.tssi_target > -4096 && dev->cal.tssi_target < 4096 && tssi_target > -4096 && tssi_target < 4096) { if ((tssi_target < 0 && tssi_target + dev->cal.tssi_target > 0) || (tssi_target > 0 && tssi_target + dev->cal.tssi_target <= 0)) tssi_target = 0; else dev->cal.tssi_target = tssi_target; } else { dev->cal.tssi_target = tssi_target; } /* make the compensate value to the nearest compensate code */ if (tssi_target > 0) tssi_target += 2048; else tssi_target -= 2048; tssi_target >>= 12; ret = mt76_get_field(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP); if (ret & BIT(5)) ret -= BIT(6); ret += tssi_target; ret = min_t(int, 31, ret); return max_t(int, -32, ret); } static void mt76x0_phy_tssi_calibrate(struct mt76x02_dev *dev) { s8 target_power, target_pa_power; u8 tssi_info[3], tx_mode; s16 ltssi; s8 val; if (mt76x0_phy_tssi_adc_calibrate(dev, <ssi, tssi_info) < 0) return; tx_mode = tssi_info[0] & 0x7; if (mt76x0_phy_get_target_power(dev, tx_mode, tssi_info, &target_power, &target_pa_power) < 0) return; val = mt76x0_phy_get_delta_power(dev, tx_mode, target_power, target_pa_power, ltssi); mt76_rmw_field(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP, val); } void mt76x0_phy_set_txpower(struct mt76x02_dev *dev) { struct mt76_rate_power *t = &dev->mt76.rate_power; s8 info; mt76x0_get_tx_power_per_rate(dev, dev->mt76.chandef.chan, t); mt76x0_get_power_info(dev, dev->mt76.chandef.chan, &info); mt76x02_add_rate_power_offset(t, info); mt76x02_limit_rate_power(t, dev->mt76.txpower_conf); dev->mt76.txpower_cur = mt76x02_get_max_rate_power(t); mt76x02_add_rate_power_offset(t, -info); dev->target_power = info; mt76x02_phy_set_txpower(dev, info, info); } void mt76x0_phy_calibrate(struct mt76x02_dev *dev, bool power_on) { struct ieee80211_channel *chan = dev->mt76.chandef.chan; int is_5ghz = (chan->band == NL80211_BAND_5GHZ) ? 1 : 0; u32 val, tx_alc, reg_val; if (is_mt7630(dev)) return; if (power_on) { mt76x02_mcu_calibrate(dev, MCU_CAL_R, 0); mt76x02_mcu_calibrate(dev, MCU_CAL_VCO, chan->hw_value); usleep_range(10, 20); if (mt76x0_tssi_enabled(dev)) { mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_RX); mt76x0_phy_tssi_dc_calibrate(dev); mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX); } } tx_alc = mt76_rr(dev, MT_TX_ALC_CFG_0); mt76_wr(dev, MT_TX_ALC_CFG_0, 0); usleep_range(500, 700); reg_val = mt76_rr(dev, MT_BBP(IBI, 9)); mt76_wr(dev, MT_BBP(IBI, 9), 0xffffff7e); if (is_5ghz) { if (chan->hw_value < 100) val = 0x701; else if (chan->hw_value < 140) val = 0x801; else val = 0x901; } else { val = 0x600; } mt76x02_mcu_calibrate(dev, MCU_CAL_FULL, val); msleep(350); mt76x02_mcu_calibrate(dev, MCU_CAL_LC, is_5ghz); usleep_range(15000, 20000); mt76_wr(dev, MT_BBP(IBI, 9), reg_val); mt76_wr(dev, MT_TX_ALC_CFG_0, tx_alc); mt76x02_mcu_calibrate(dev, MCU_CAL_RXDCOC, 1); } EXPORT_SYMBOL_GPL(mt76x0_phy_calibrate); int mt76x0_phy_set_channel(struct mt76x02_dev *dev, struct cfg80211_chan_def *chandef) { u32 ext_cca_chan[4] = { [0] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 0) | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 1) | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 2) | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 3) | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(0)), [1] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 1) | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 0) | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 2) | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 3) | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(1)), [2] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 2) | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 3) | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 1) | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 0) | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(2)), [3] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 3) | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 2) | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 1) | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 0) | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(3)), }; bool scan = test_bit(MT76_SCANNING, &dev->mt76.state); int ch_group_index, freq, freq1; u8 channel; u32 val; u16 rf_bw_band; freq = chandef->chan->center_freq; freq1 = chandef->center_freq1; channel = chandef->chan->hw_value; rf_bw_band = (channel <= 14) ? RF_G_BAND : RF_A_BAND; dev->mt76.chandef = *chandef; switch (chandef->width) { case NL80211_CHAN_WIDTH_40: if (freq1 > freq) ch_group_index = 0; else ch_group_index = 1; channel += 2 - ch_group_index * 4; rf_bw_band |= RF_BW_40; break; case NL80211_CHAN_WIDTH_80: ch_group_index = (freq - freq1 + 30) / 20; if (WARN_ON(ch_group_index < 0 || ch_group_index > 3)) ch_group_index = 0; channel += 6 - ch_group_index * 4; rf_bw_band |= RF_BW_80; break; default: ch_group_index = 0; rf_bw_band |= RF_BW_20; break; } if (mt76_is_usb(dev)) { mt76x0_phy_bbp_set_bw(dev, chandef->width); } else { if (chandef->width == NL80211_CHAN_WIDTH_80 || chandef->width == NL80211_CHAN_WIDTH_40) val = 0x201; else val = 0x601; mt76_wr(dev, MT_TX_SW_CFG0, val); } mt76x02_phy_set_bw(dev, chandef->width, ch_group_index); mt76x02_phy_set_band(dev, chandef->chan->band, ch_group_index & 1); mt76_rmw(dev, MT_EXT_CCA_CFG, (MT_EXT_CCA_CFG_CCA0 | MT_EXT_CCA_CFG_CCA1 | MT_EXT_CCA_CFG_CCA2 | MT_EXT_CCA_CFG_CCA3 | MT_EXT_CCA_CFG_CCA_MASK), ext_cca_chan[ch_group_index]); mt76x0_phy_set_band(dev, chandef->chan->band); mt76x0_phy_set_chan_rf_params(dev, channel, rf_bw_band); /* set Japan Tx filter at channel 14 */ if (channel == 14) mt76_set(dev, MT_BBP(CORE, 1), 0x20); else mt76_clear(dev, MT_BBP(CORE, 1), 0x20); mt76x0_read_rx_gain(dev); mt76x0_phy_set_chan_bbp_params(dev, rf_bw_band); /* enable vco */ mt76x0_rf_set(dev, MT_RF(0, 4), BIT(7)); if (scan) return 0; mt76x02_init_agc_gain(dev); mt76x0_phy_calibrate(dev, false); mt76x0_phy_set_txpower(dev); ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work, MT_CALIBRATE_INTERVAL); return 0; } static void mt76x0_phy_temp_sensor(struct mt76x02_dev *dev) { u8 rf_b7_73, rf_b0_66, rf_b0_67; s8 val; rf_b7_73 = mt76x0_rf_rr(dev, MT_RF(7, 73)); rf_b0_66 = mt76x0_rf_rr(dev, MT_RF(0, 66)); rf_b0_67 = mt76x0_rf_rr(dev, MT_RF(0, 67)); mt76x0_rf_wr(dev, MT_RF(7, 73), 0x02); mt76x0_rf_wr(dev, MT_RF(0, 66), 0x23); mt76x0_rf_wr(dev, MT_RF(0, 67), 0x01); mt76_wr(dev, MT_BBP(CORE, 34), 0x00080055); if (!mt76_poll_msec(dev, MT_BBP(CORE, 34), BIT(4), 0, 200)) { mt76_clear(dev, MT_BBP(CORE, 34), BIT(4)); goto done; } val = mt76_rr(dev, MT_BBP(CORE, 35)); val = (35 * (val - dev->cal.rx.temp_offset)) / 10 + 25; if (abs(val - dev->cal.temp_vco) > 20) { mt76x02_mcu_calibrate(dev, MCU_CAL_VCO, dev->mt76.chandef.chan->hw_value); dev->cal.temp_vco = val; } if (abs(val - dev->cal.temp) > 30) { mt76x0_phy_calibrate(dev, false); dev->cal.temp = val; } done: mt76x0_rf_wr(dev, MT_RF(7, 73), rf_b7_73); mt76x0_rf_wr(dev, MT_RF(0, 66), rf_b0_66); mt76x0_rf_wr(dev, MT_RF(0, 67), rf_b0_67); } static void mt76x0_phy_set_gain_val(struct mt76x02_dev *dev) { u8 gain = dev->cal.agc_gain_cur[0] - dev->cal.agc_gain_adjust; mt76_rmw_field(dev, MT_BBP(AGC, 8), MT_BBP_AGC_GAIN, gain); if ((dev->mt76.chandef.chan->flags & IEEE80211_CHAN_RADAR) && !is_mt7630(dev)) mt76x02_phy_dfs_adjust_agc(dev); } static void mt76x0_phy_update_channel_gain(struct mt76x02_dev *dev) { bool gain_change; u8 gain_delta; int low_gain; dev->cal.avg_rssi_all = mt76_get_min_avg_rssi(&dev->mt76); if (!dev->cal.avg_rssi_all) dev->cal.avg_rssi_all = -75; low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) + (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev)); gain_change = dev->cal.low_gain < 0 || (dev->cal.low_gain & 2) ^ (low_gain & 2); dev->cal.low_gain = low_gain; if (!gain_change) { if (mt76x02_phy_adjust_vga_gain(dev)) mt76x0_phy_set_gain_val(dev); return; } dev->cal.agc_gain_adjust = (low_gain == 2) ? 0 : 10; gain_delta = (low_gain == 2) ? 10 : 0; dev->cal.agc_gain_cur[0] = dev->cal.agc_gain_init[0] - gain_delta; mt76x0_phy_set_gain_val(dev); /* clear false CCA counters */ mt76_rr(dev, MT_RX_STAT_1); } static void mt76x0_phy_calibration_work(struct work_struct *work) { struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev, cal_work.work); mt76x0_phy_update_channel_gain(dev); if (mt76x0_tssi_enabled(dev)) mt76x0_phy_tssi_calibrate(dev); else mt76x0_phy_temp_sensor(dev); ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work, 4 * MT_CALIBRATE_INTERVAL); } static void mt76x0_rf_patch_reg_array(struct mt76x02_dev *dev, const struct mt76_reg_pair *rp, int len) { int i; for (i = 0; i < len; i++) { u32 reg = rp[i].reg; u8 val = rp[i].value; switch (reg) { case MT_RF(0, 3): if (mt76_is_mmio(dev)) { if (is_mt7630(dev)) val = 0x70; else val = 0x63; } else { val = 0x73; } break; case MT_RF(0, 21): if (is_mt7610e(dev)) val = 0x10; else val = 0x12; break; case MT_RF(5, 2): if (is_mt7630(dev)) val = 0x1d; else if (is_mt7610e(dev)) val = 0x00; else val = 0x0c; break; default: break; } mt76x0_rf_wr(dev, reg, val); } } static void mt76x0_phy_rf_init(struct mt76x02_dev *dev) { int i; u8 val; mt76x0_rf_patch_reg_array(dev, mt76x0_rf_central_tab, ARRAY_SIZE(mt76x0_rf_central_tab)); mt76x0_rf_patch_reg_array(dev, mt76x0_rf_2g_channel_0_tab, ARRAY_SIZE(mt76x0_rf_2g_channel_0_tab)); RF_RANDOM_WRITE(dev, mt76x0_rf_5g_channel_0_tab); RF_RANDOM_WRITE(dev, mt76x0_rf_vga_channel_0_tab); for (i = 0; i < ARRAY_SIZE(mt76x0_rf_bw_switch_tab); i++) { const struct mt76x0_rf_switch_item *item = &mt76x0_rf_bw_switch_tab[i]; if (item->bw_band == RF_BW_20) mt76x0_rf_wr(dev, item->rf_bank_reg, item->value); else if (((RF_G_BAND | RF_BW_20) & item->bw_band) == (RF_G_BAND | RF_BW_20)) mt76x0_rf_wr(dev, item->rf_bank_reg, item->value); } for (i = 0; i < ARRAY_SIZE(mt76x0_rf_band_switch_tab); i++) { if (mt76x0_rf_band_switch_tab[i].bw_band & RF_G_BAND) { mt76x0_rf_wr(dev, mt76x0_rf_band_switch_tab[i].rf_bank_reg, mt76x0_rf_band_switch_tab[i].value); } } /* Frequency calibration * E1: B0.R22<6:0>: xo_cxo<6:0> * E2: B0.R21<0>: xo_cxo<0>, B0.R22<7:0>: xo_cxo<8:1> */ mt76x0_rf_wr(dev, MT_RF(0, 22), min_t(u8, dev->cal.rx.freq_offset, 0xbf)); val = mt76x0_rf_rr(dev, MT_RF(0, 22)); /* Reset procedure DAC during power-up: * - set B0.R73<7> * - clear B0.R73<7> * - set B0.R73<7> */ mt76x0_rf_set(dev, MT_RF(0, 73), BIT(7)); mt76x0_rf_clear(dev, MT_RF(0, 73), BIT(7)); mt76x0_rf_set(dev, MT_RF(0, 73), BIT(7)); /* vcocal_en: initiate VCO calibration (reset after completion)) */ mt76x0_rf_set(dev, MT_RF(0, 4), 0x80); } void mt76x0_phy_init(struct mt76x02_dev *dev) { INIT_DELAYED_WORK(&dev->cal_work, mt76x0_phy_calibration_work); mt76x0_phy_ant_select(dev); mt76x0_phy_rf_init(dev); mt76x02_phy_set_rxpath(dev); mt76x02_phy_set_txdac(dev); }