Run mt76x0 tssi calibration process if enabled in eeprom data.
Perform calibration procedure every 4s
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@xxxxxxxxxx>
---
.../net/wireless/mediatek/mt76/mt76x0/phy.c | 355 +++++++++++++++++-
drivers/net/wireless/mediatek/mt76/mt76x02.h | 3 +
.../wireless/mediatek/mt76/mt76x02_eeprom.h | 2 +
3 files changed, 357 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index 830ea6047f10..f0d46e7bb76a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -503,6 +503,345 @@ mt76x0_phy_bbp_set_bw(struct mt76x02_dev *dev, enum nl80211_chan_width width)
mt76x02_mcu_function_select(dev, BW_SETTING, bw, false);
}
+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;
@@ -532,7 +871,15 @@ void mt76x0_phy_calibrate(struct mt76x02_dev *dev, bool power_on)
mt76x02_mcu_calibrate(dev, MCU_CAL_VCO, chan->hw_value,
false);
usleep_range(10, 20);
- /* XXX: tssi */
+
+ 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);
@@ -761,11 +1108,13 @@ static void mt76x0_phy_calibration_work(struct work_struct *work)
cal_work.work);
mt76x0_phy_update_channel_gain(dev);
- if (!mt76x0_tssi_enabled(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,
- MT_CALIBRATE_INTERVAL);
+ 4 * MT_CALIBRATE_INTERVAL);
}
static void mt76x0_rf_patch_reg_array(struct mt76x02_dev *dev,
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02.h b/drivers/net/wireless/mediatek/mt76/mt76x02.h
index d599b7dddac7..de1be1529f61 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02.h
@@ -57,6 +57,9 @@ struct mt76x02_calibration {
bool tssi_comp_pending;
bool dpd_cal_done;
bool channel_cal_done;
+
+ int tssi_target;
+ s8 tssi_dc;
};
struct mt76x02_dev {
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
index 5db01bda64b5..e3442bc4e0a4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
@@ -56,6 +56,7 @@ enum mt76x02_eeprom_field {
#define MT_TX_POWER_GROUP_SIZE_5G 5
#define MT_TX_POWER_GROUPS_5G 6
MT_EE_TX_POWER_0_START_5G = 0x062,
+ MT_EE_TSSI_SLOPE_2G = 0x06e,
MT_EE_TX_POWER_0_GRP3_TX_POWER_DELTA = 0x074,
MT_EE_TX_POWER_0_GRP4_TSSI_SLOPE = 0x076,
@@ -86,6 +87,7 @@ enum mt76x02_eeprom_field {
MT_EE_TSSI_BOUND5 = 0x0dc,
MT_EE_TX_POWER_BYRATE_BASE = 0x0de,
+ MT_EE_TSSI_SLOPE_5G = 0x0f0,
MT_EE_RF_TEMP_COMP_SLOPE_5G = 0x0f2,
MT_EE_RF_TEMP_COMP_SLOPE_2G = 0x0f4,
--
2.19.1
