developer | 0f312e8 | 2022-11-01 12:31:52 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* |
| 3 | * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> |
| 4 | */ |
| 5 | |
| 6 | #include <linux/delay.h> |
| 7 | #include "mt76x2.h" |
| 8 | #include "mcu.h" |
| 9 | #include "eeprom.h" |
| 10 | #include "../mt76x02_phy.h" |
| 11 | |
| 12 | static bool |
| 13 | mt76x2_phy_tssi_init_cal(struct mt76x02_dev *dev) |
| 14 | { |
| 15 | struct ieee80211_channel *chan = dev->mphy.chandef.chan; |
| 16 | u32 flag = 0; |
| 17 | |
| 18 | if (!mt76x2_tssi_enabled(dev)) |
| 19 | return false; |
| 20 | |
| 21 | if (mt76x2_channel_silent(dev)) |
| 22 | return false; |
| 23 | |
| 24 | if (chan->band == NL80211_BAND_5GHZ) |
| 25 | flag |= BIT(0); |
| 26 | |
| 27 | if (mt76x02_ext_pa_enabled(dev, chan->band)) |
| 28 | flag |= BIT(8); |
| 29 | |
| 30 | mt76x02_mcu_calibrate(dev, MCU_CAL_TSSI, flag); |
| 31 | dev->cal.tssi_cal_done = true; |
| 32 | return true; |
| 33 | } |
| 34 | |
| 35 | static void |
| 36 | mt76x2_phy_channel_calibrate(struct mt76x02_dev *dev, bool mac_stopped) |
| 37 | { |
| 38 | struct ieee80211_channel *chan = dev->mphy.chandef.chan; |
| 39 | bool is_5ghz = chan->band == NL80211_BAND_5GHZ; |
| 40 | |
| 41 | if (dev->cal.channel_cal_done) |
| 42 | return; |
| 43 | |
| 44 | if (mt76x2_channel_silent(dev)) |
| 45 | return; |
| 46 | |
| 47 | if (!dev->cal.tssi_cal_done) |
| 48 | mt76x2_phy_tssi_init_cal(dev); |
| 49 | |
| 50 | if (!mac_stopped) |
| 51 | mt76x2_mac_stop(dev, false); |
| 52 | |
| 53 | if (is_5ghz) |
| 54 | mt76x02_mcu_calibrate(dev, MCU_CAL_LC, 0); |
| 55 | |
| 56 | mt76x02_mcu_calibrate(dev, MCU_CAL_TX_LOFT, is_5ghz); |
| 57 | mt76x02_mcu_calibrate(dev, MCU_CAL_TXIQ, is_5ghz); |
| 58 | mt76x02_mcu_calibrate(dev, MCU_CAL_RXIQC_FI, is_5ghz); |
| 59 | mt76x02_mcu_calibrate(dev, MCU_CAL_TEMP_SENSOR, 0); |
| 60 | mt76x02_mcu_calibrate(dev, MCU_CAL_TX_SHAPING, 0); |
| 61 | |
| 62 | if (!mac_stopped) |
| 63 | mt76x2_mac_resume(dev); |
| 64 | |
| 65 | mt76x2_apply_gain_adj(dev); |
| 66 | mt76x02_edcca_init(dev); |
| 67 | |
| 68 | dev->cal.channel_cal_done = true; |
| 69 | } |
| 70 | |
| 71 | void mt76x2_phy_set_antenna(struct mt76x02_dev *dev) |
| 72 | { |
| 73 | u32 val; |
| 74 | |
| 75 | val = mt76_rr(dev, MT_BBP(AGC, 0)); |
| 76 | val &= ~(BIT(4) | BIT(1)); |
| 77 | switch (dev->mphy.antenna_mask) { |
| 78 | case 1: |
| 79 | /* disable mac DAC control */ |
| 80 | mt76_clear(dev, MT_BBP(IBI, 9), BIT(11)); |
| 81 | mt76_clear(dev, MT_BBP(TXBE, 5), 3); |
| 82 | mt76_rmw_field(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT, 0x3); |
| 83 | mt76_rmw_field(dev, MT_BBP(CORE, 32), GENMASK(21, 20), 2); |
| 84 | /* disable DAC 1 */ |
| 85 | mt76_rmw_field(dev, MT_BBP(CORE, 33), GENMASK(12, 9), 4); |
| 86 | |
| 87 | val &= ~(BIT(3) | BIT(0)); |
| 88 | break; |
| 89 | case 2: |
| 90 | /* disable mac DAC control */ |
| 91 | mt76_clear(dev, MT_BBP(IBI, 9), BIT(11)); |
| 92 | mt76_rmw_field(dev, MT_BBP(TXBE, 5), 3, 1); |
| 93 | mt76_rmw_field(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT, 0xc); |
| 94 | mt76_rmw_field(dev, MT_BBP(CORE, 32), GENMASK(21, 20), 1); |
| 95 | /* disable DAC 0 */ |
| 96 | mt76_rmw_field(dev, MT_BBP(CORE, 33), GENMASK(12, 9), 1); |
| 97 | |
| 98 | val &= ~BIT(3); |
| 99 | val |= BIT(0); |
| 100 | break; |
| 101 | case 3: |
| 102 | default: |
| 103 | /* enable mac DAC control */ |
| 104 | mt76_set(dev, MT_BBP(IBI, 9), BIT(11)); |
| 105 | mt76_set(dev, MT_BBP(TXBE, 5), 3); |
| 106 | mt76_rmw_field(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT, 0xf); |
| 107 | mt76_clear(dev, MT_BBP(CORE, 32), GENMASK(21, 20)); |
| 108 | mt76_clear(dev, MT_BBP(CORE, 33), GENMASK(12, 9)); |
| 109 | |
| 110 | val &= ~BIT(0); |
| 111 | val |= BIT(3); |
| 112 | break; |
| 113 | } |
| 114 | mt76_wr(dev, MT_BBP(AGC, 0), val); |
| 115 | } |
| 116 | |
| 117 | int mt76x2_phy_set_channel(struct mt76x02_dev *dev, |
| 118 | struct cfg80211_chan_def *chandef) |
| 119 | { |
| 120 | struct ieee80211_channel *chan = chandef->chan; |
| 121 | bool scan = test_bit(MT76_SCANNING, &dev->mphy.state); |
| 122 | enum nl80211_band band = chan->band; |
| 123 | u8 channel; |
| 124 | |
| 125 | u32 ext_cca_chan[4] = { |
| 126 | [0] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 0) | |
| 127 | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 1) | |
| 128 | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 2) | |
| 129 | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 3) | |
| 130 | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(0)), |
| 131 | [1] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 1) | |
| 132 | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 0) | |
| 133 | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 2) | |
| 134 | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 3) | |
| 135 | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(1)), |
| 136 | [2] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 2) | |
| 137 | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 3) | |
| 138 | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 1) | |
| 139 | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 0) | |
| 140 | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(2)), |
| 141 | [3] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 3) | |
| 142 | FIELD_PREP(MT_EXT_CCA_CFG_CCA1, 2) | |
| 143 | FIELD_PREP(MT_EXT_CCA_CFG_CCA2, 1) | |
| 144 | FIELD_PREP(MT_EXT_CCA_CFG_CCA3, 0) | |
| 145 | FIELD_PREP(MT_EXT_CCA_CFG_CCA_MASK, BIT(3)), |
| 146 | }; |
| 147 | int ch_group_index; |
| 148 | u8 bw, bw_index; |
| 149 | int freq, freq1; |
| 150 | int ret; |
| 151 | |
| 152 | dev->cal.channel_cal_done = false; |
| 153 | freq = chandef->chan->center_freq; |
| 154 | freq1 = chandef->center_freq1; |
| 155 | channel = chan->hw_value; |
| 156 | |
| 157 | switch (chandef->width) { |
| 158 | case NL80211_CHAN_WIDTH_40: |
| 159 | bw = 1; |
| 160 | if (freq1 > freq) { |
| 161 | bw_index = 1; |
| 162 | ch_group_index = 0; |
| 163 | } else { |
| 164 | bw_index = 3; |
| 165 | ch_group_index = 1; |
| 166 | } |
| 167 | channel += 2 - ch_group_index * 4; |
| 168 | break; |
| 169 | case NL80211_CHAN_WIDTH_80: |
| 170 | ch_group_index = (freq - freq1 + 30) / 20; |
| 171 | if (WARN_ON(ch_group_index < 0 || ch_group_index > 3)) |
| 172 | ch_group_index = 0; |
| 173 | bw = 2; |
| 174 | bw_index = ch_group_index; |
| 175 | channel += 6 - ch_group_index * 4; |
| 176 | break; |
| 177 | default: |
| 178 | bw = 0; |
| 179 | bw_index = 0; |
| 180 | ch_group_index = 0; |
| 181 | break; |
| 182 | } |
| 183 | |
| 184 | mt76x2_read_rx_gain(dev); |
| 185 | mt76x2_phy_set_txpower_regs(dev, band); |
| 186 | mt76x2_configure_tx_delay(dev, band, bw); |
| 187 | mt76x2_phy_set_txpower(dev); |
| 188 | |
| 189 | mt76x02_phy_set_band(dev, chan->band, ch_group_index & 1); |
| 190 | mt76x02_phy_set_bw(dev, chandef->width, ch_group_index); |
| 191 | |
| 192 | mt76_rmw(dev, MT_EXT_CCA_CFG, |
| 193 | (MT_EXT_CCA_CFG_CCA0 | |
| 194 | MT_EXT_CCA_CFG_CCA1 | |
| 195 | MT_EXT_CCA_CFG_CCA2 | |
| 196 | MT_EXT_CCA_CFG_CCA3 | |
| 197 | MT_EXT_CCA_CFG_CCA_MASK), |
| 198 | ext_cca_chan[ch_group_index]); |
| 199 | |
| 200 | ret = mt76x2_mcu_set_channel(dev, channel, bw, bw_index, scan); |
| 201 | if (ret) |
| 202 | return ret; |
| 203 | |
| 204 | mt76x2_mcu_init_gain(dev, channel, dev->cal.rx.mcu_gain, true); |
| 205 | |
| 206 | mt76x2_phy_set_antenna(dev); |
| 207 | |
| 208 | /* Enable LDPC Rx */ |
| 209 | if (mt76xx_rev(dev) >= MT76XX_REV_E3) |
| 210 | mt76_set(dev, MT_BBP(RXO, 13), BIT(10)); |
| 211 | |
| 212 | if (!dev->cal.init_cal_done) { |
| 213 | u8 val = mt76x02_eeprom_get(dev, MT_EE_BT_RCAL_RESULT); |
| 214 | |
| 215 | if (val != 0xff) |
| 216 | mt76x02_mcu_calibrate(dev, MCU_CAL_R, 0); |
| 217 | } |
| 218 | |
| 219 | mt76x02_mcu_calibrate(dev, MCU_CAL_RXDCOC, channel); |
| 220 | |
| 221 | /* Rx LPF calibration */ |
| 222 | if (!dev->cal.init_cal_done) |
| 223 | mt76x02_mcu_calibrate(dev, MCU_CAL_RC, 0); |
| 224 | |
| 225 | dev->cal.init_cal_done = true; |
| 226 | |
| 227 | mt76_wr(dev, MT_BBP(AGC, 61), 0xFF64A4E2); |
| 228 | mt76_wr(dev, MT_BBP(AGC, 7), 0x08081010); |
| 229 | mt76_wr(dev, MT_BBP(AGC, 11), 0x00000404); |
| 230 | mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070); |
| 231 | mt76_wr(dev, MT_TXOP_CTRL_CFG, 0x04101B3F); |
| 232 | |
| 233 | if (scan) |
| 234 | return 0; |
| 235 | |
| 236 | mt76x2_phy_channel_calibrate(dev, true); |
| 237 | mt76x02_init_agc_gain(dev); |
| 238 | |
| 239 | /* init default values for temp compensation */ |
| 240 | if (mt76x2_tssi_enabled(dev)) { |
| 241 | mt76_rmw_field(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP, |
| 242 | 0x38); |
| 243 | mt76_rmw_field(dev, MT_TX_ALC_CFG_2, MT_TX_ALC_CFG_2_TEMP_COMP, |
| 244 | 0x38); |
| 245 | } |
| 246 | |
| 247 | ieee80211_queue_delayed_work(mt76_hw(dev), &dev->cal_work, |
| 248 | MT_CALIBRATE_INTERVAL); |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static void |
| 254 | mt76x2_phy_temp_compensate(struct mt76x02_dev *dev) |
| 255 | { |
| 256 | struct mt76x2_temp_comp t; |
| 257 | int temp, db_diff; |
| 258 | |
| 259 | if (mt76x2_get_temp_comp(dev, &t)) |
| 260 | return; |
| 261 | |
| 262 | temp = mt76_get_field(dev, MT_TEMP_SENSOR, MT_TEMP_SENSOR_VAL); |
| 263 | temp -= t.temp_25_ref; |
| 264 | temp = (temp * 1789) / 1000 + 25; |
| 265 | dev->cal.temp = temp; |
| 266 | |
| 267 | if (temp > 25) |
| 268 | db_diff = (temp - 25) / t.high_slope; |
| 269 | else |
| 270 | db_diff = (25 - temp) / t.low_slope; |
| 271 | |
| 272 | db_diff = min(db_diff, t.upper_bound); |
| 273 | db_diff = max(db_diff, t.lower_bound); |
| 274 | |
| 275 | mt76_rmw_field(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP, |
| 276 | db_diff * 2); |
| 277 | mt76_rmw_field(dev, MT_TX_ALC_CFG_2, MT_TX_ALC_CFG_2_TEMP_COMP, |
| 278 | db_diff * 2); |
| 279 | } |
| 280 | |
| 281 | void mt76x2_phy_calibrate(struct work_struct *work) |
| 282 | { |
| 283 | struct mt76x02_dev *dev; |
| 284 | |
| 285 | dev = container_of(work, struct mt76x02_dev, cal_work.work); |
| 286 | |
| 287 | mutex_lock(&dev->mt76.mutex); |
| 288 | |
| 289 | mt76x2_phy_channel_calibrate(dev, false); |
| 290 | mt76x2_phy_tssi_compensate(dev); |
| 291 | mt76x2_phy_temp_compensate(dev); |
| 292 | mt76x2_phy_update_channel_gain(dev); |
| 293 | |
| 294 | mutex_unlock(&dev->mt76.mutex); |
| 295 | |
| 296 | ieee80211_queue_delayed_work(mt76_hw(dev), &dev->cal_work, |
| 297 | MT_CALIBRATE_INTERVAL); |
| 298 | } |
| 299 | |
| 300 | int mt76x2_phy_start(struct mt76x02_dev *dev) |
| 301 | { |
| 302 | int ret; |
| 303 | |
| 304 | ret = mt76x02_mcu_set_radio_state(dev, true); |
| 305 | if (ret) |
| 306 | return ret; |
| 307 | |
| 308 | mt76x2_mcu_load_cr(dev, MT_RF_BBP_CR, 0, 0); |
| 309 | |
| 310 | return ret; |
| 311 | } |