wifi: rtw89: 8852b: add chip_ops to read phy cap

This efuse region is to store PHY calibration, and it is a separated region
from the region that stores MAC address. Then, use these data to configure
via chip_ops::power_trim that is a calibration mechanism of TX power.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220928084336.34981-9-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.h

@@ -84,6 +84,7 @@ enum rtw89_subband {
 	RTW89_CH_6G_BAND_IDX7, /* Ultra-high */
 
 	RTW89_SUBBAND_NR,
+	RTW89_SUBBAND_2GHZ_5GHZ_NR = RTW89_CH_5G_BAND_4 + 1,
 };
 
 enum rtw89_gain_offset {
@@ -2196,6 +2197,7 @@ struct rtw89_sta {
 
 struct rtw89_efuse {
 	bool valid;
+	bool power_k_valid;
 	u8 xtal_cap;
 	u8 addr[ETH_ALEN];
 	u8 rfe_type;
@@ -3425,8 +3427,10 @@ struct rtw89_phy_bb_gain_info {
 
 struct rtw89_phy_efuse_gain {
 	bool offset_valid;
+	bool comp_valid;
 	s8 offset[RF_PATH_MAX][RTW89_GAIN_OFFSET_NR]; /* S(8, 0) */
 	s8 offset_base[RTW89_PHY_MAX]; /* S(8, 4) */
+	s8 comp[RF_PATH_MAX][RTW89_SUBBAND_NR]; /* S(8, 0) */
 };
 
 struct rtw89_dev {

drivers/net/wireless/realtek/rtw89/rtw8852b.c

@@ -123,6 +123,186 @@ static int rtw8852b_read_efuse(struct rtw89_dev *rtwdev, u8 *log_map)
 	return 0;
 }
 
+static void rtw8852b_phycap_parsing_power_cal(struct rtw89_dev *rtwdev, u8 *phycap_map)
+{
+#define PWR_K_CHK_OFFSET 0x5E9
+#define PWR_K_CHK_VALUE 0xAA
+	u32 offset = PWR_K_CHK_OFFSET - rtwdev->chip->phycap_addr;
+
+	if (phycap_map[offset] == PWR_K_CHK_VALUE)
+		rtwdev->efuse.power_k_valid = true;
+}
+
+static void rtw8852b_phycap_parsing_tssi(struct rtw89_dev *rtwdev, u8 *phycap_map)
+{
+	struct rtw89_tssi_info *tssi = &rtwdev->tssi;
+	static const u32 tssi_trim_addr[RF_PATH_NUM_8852B] = {0x5D6, 0x5AB};
+	u32 addr = rtwdev->chip->phycap_addr;
+	bool pg = false;
+	u32 ofst;
+	u8 i, j;
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		for (j = 0; j < TSSI_TRIM_CH_GROUP_NUM; j++) {
+			/* addrs are in decreasing order */
+			ofst = tssi_trim_addr[i] - addr - j;
+			tssi->tssi_trim[i][j] = phycap_map[ofst];
+
+			if (phycap_map[ofst] != 0xff)
+				pg = true;
+		}
+	}
+
+	if (!pg) {
+		memset(tssi->tssi_trim, 0, sizeof(tssi->tssi_trim));
+		rtw89_debug(rtwdev, RTW89_DBG_TSSI,
+			    "[TSSI][TRIM] no PG, set all trim info to 0\n");
+	}
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++)
+		for (j = 0; j < TSSI_TRIM_CH_GROUP_NUM; j++)
+			rtw89_debug(rtwdev, RTW89_DBG_TSSI,
+				    "[TSSI] path=%d idx=%d trim=0x%x addr=0x%x\n",
+				    i, j, tssi->tssi_trim[i][j],
+				    tssi_trim_addr[i] - j);
+}
+
+static void rtw8852b_phycap_parsing_thermal_trim(struct rtw89_dev *rtwdev,
+						 u8 *phycap_map)
+{
+	struct rtw89_power_trim_info *info = &rtwdev->pwr_trim;
+	static const u32 thm_trim_addr[RF_PATH_NUM_8852B] = {0x5DF, 0x5DC};
+	u32 addr = rtwdev->chip->phycap_addr;
+	u8 i;
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		info->thermal_trim[i] = phycap_map[thm_trim_addr[i] - addr];
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[THERMAL][TRIM] path=%d thermal_trim=0x%x\n",
+			    i, info->thermal_trim[i]);
+
+		if (info->thermal_trim[i] != 0xff)
+			info->pg_thermal_trim = true;
+	}
+}
+
+static void rtw8852b_thermal_trim(struct rtw89_dev *rtwdev)
+{
+#define __thm_setting(raw)				\
+({							\
+	u8 __v = (raw);					\
+	((__v & 0x1) << 3) | ((__v & 0x1f) >> 1);	\
+})
+	struct rtw89_power_trim_info *info = &rtwdev->pwr_trim;
+	u8 i, val;
+
+	if (!info->pg_thermal_trim) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[THERMAL][TRIM] no PG, do nothing\n");
+
+		return;
+	}
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		val = __thm_setting(info->thermal_trim[i]);
+		rtw89_write_rf(rtwdev, i, RR_TM2, RR_TM2_OFF, val);
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[THERMAL][TRIM] path=%d thermal_setting=0x%x\n",
+			    i, val);
+	}
+#undef __thm_setting
+}
+
+static void rtw8852b_phycap_parsing_pa_bias_trim(struct rtw89_dev *rtwdev,
+						 u8 *phycap_map)
+{
+	struct rtw89_power_trim_info *info = &rtwdev->pwr_trim;
+	static const u32 pabias_trim_addr[RF_PATH_NUM_8852B] = {0x5DE, 0x5DB};
+	u32 addr = rtwdev->chip->phycap_addr;
+	u8 i;
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		info->pa_bias_trim[i] = phycap_map[pabias_trim_addr[i] - addr];
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[PA_BIAS][TRIM] path=%d pa_bias_trim=0x%x\n",
+			    i, info->pa_bias_trim[i]);
+
+		if (info->pa_bias_trim[i] != 0xff)
+			info->pg_pa_bias_trim = true;
+	}
+}
+
+static void rtw8852b_pa_bias_trim(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_power_trim_info *info = &rtwdev->pwr_trim;
+	u8 pabias_2g, pabias_5g;
+	u8 i;
+
+	if (!info->pg_pa_bias_trim) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[PA_BIAS][TRIM] no PG, do nothing\n");
+
+		return;
+	}
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		pabias_2g = FIELD_GET(GENMASK(3, 0), info->pa_bias_trim[i]);
+		pabias_5g = FIELD_GET(GENMASK(7, 4), info->pa_bias_trim[i]);
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[PA_BIAS][TRIM] path=%d 2G=0x%x 5G=0x%x\n",
+			    i, pabias_2g, pabias_5g);
+
+		rtw89_write_rf(rtwdev, i, RR_BIASA, RR_BIASA_TXG, pabias_2g);
+		rtw89_write_rf(rtwdev, i, RR_BIASA, RR_BIASA_TXA, pabias_5g);
+	}
+}
+
+static void rtw8852b_phycap_parsing_gain_comp(struct rtw89_dev *rtwdev, u8 *phycap_map)
+{
+	static const u32 comp_addrs[][RTW89_SUBBAND_2GHZ_5GHZ_NR] = {
+		{0x5BB, 0x5BA, 0, 0x5B9, 0x5B8},
+		{0x590, 0x58F, 0, 0x58E, 0x58D},
+	};
+	struct rtw89_phy_efuse_gain *gain = &rtwdev->efuse_gain;
+	u32 phycap_addr = rtwdev->chip->phycap_addr;
+	bool valid = false;
+	int path, i;
+	u8 data;
+
+	for (path = 0; path < 2; path++)
+		for (i = 0; i < RTW89_SUBBAND_2GHZ_5GHZ_NR; i++) {
+			if (comp_addrs[path][i] == 0)
+				continue;
+
+			data = phycap_map[comp_addrs[path][i] - phycap_addr];
+			valid |= _decode_efuse_gain(data, NULL,
+						    &gain->comp[path][i]);
+		}
+
+	gain->comp_valid = valid;
+}
+
+static int rtw8852b_read_phycap(struct rtw89_dev *rtwdev, u8 *phycap_map)
+{
+	rtw8852b_phycap_parsing_power_cal(rtwdev, phycap_map);
+	rtw8852b_phycap_parsing_tssi(rtwdev, phycap_map);
+	rtw8852b_phycap_parsing_thermal_trim(rtwdev, phycap_map);
+	rtw8852b_phycap_parsing_pa_bias_trim(rtwdev, phycap_map);
+	rtw8852b_phycap_parsing_gain_comp(rtwdev, phycap_map);
+
+	return 0;
+}
+
+static void rtw8852b_power_trim(struct rtw89_dev *rtwdev)
+{
+	rtw8852b_thermal_trim(rtwdev);
+	rtw8852b_pa_bias_trim(rtwdev);
+}
+
 static u32 rtw8852b_bb_cal_txpwr_ref(struct rtw89_dev *rtwdev,
 				     enum rtw89_phy_idx phy_idx, s16 ref)
 {
@@ -369,6 +549,8 @@ static const struct rtw89_chip_ops rtw8852b_chip_ops = {
 	.enable_bb_rf		= rtw8852b_mac_enable_bb_rf,
 	.disable_bb_rf		= rtw8852b_mac_disable_bb_rf,
 	.read_efuse		= rtw8852b_read_efuse,
+	.read_phycap		= rtw8852b_read_phycap,
+	.power_trim		= rtw8852b_power_trim,
 	.set_txpwr		= rtw8852b_set_txpwr,
 	.set_txpwr_ctrl		= rtw8852b_set_txpwr_ctrl,
 	.init_txpwr_unit	= rtw8852b_init_txpwr_unit,
@@ -386,6 +568,8 @@ const struct rtw89_chip_info rtw8852b_chip_info = {
 	.limit_efuse_size	= 1280,
 	.dav_phy_efuse_size	= 96,
 	.dav_log_efuse_size	= 16,
+	.phycap_addr		= 0x580,
+	.phycap_size		= 128,
 	.dma_ch_mask		= BIT(RTW89_DMA_ACH4) | BIT(RTW89_DMA_ACH5) |
 				  BIT(RTW89_DMA_ACH6) | BIT(RTW89_DMA_ACH7) |
 				  BIT(RTW89_DMA_B1MG) | BIT(RTW89_DMA_B1HI),