wifi: rtw89: 8852b: add chip_ops to read efuse

efuse stores individual data about a chip itself, such as MAC address,
country code, RF and crystal calibration data, and so on. Define a struct
to help access efuse content, and copy them into a common struct.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220928084336.34981-8-pkshih@realtek.com

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

@@ -24,6 +24,105 @@ static const struct rtw89_dle_mem rtw8852b_dle_mem_pcie[] = {
 			       NULL},
 };
 
+static void rtw8852be_efuse_parsing(struct rtw89_efuse *efuse,
+				    struct rtw8852b_efuse *map)
+{
+	ether_addr_copy(efuse->addr, map->e.mac_addr);
+	efuse->rfe_type = map->rfe_type;
+	efuse->xtal_cap = map->xtal_k;
+}
+
+static void rtw8852b_efuse_parsing_tssi(struct rtw89_dev *rtwdev,
+					struct rtw8852b_efuse *map)
+{
+	struct rtw89_tssi_info *tssi = &rtwdev->tssi;
+	struct rtw8852b_tssi_offset *ofst[] = {&map->path_a_tssi, &map->path_b_tssi};
+	u8 i, j;
+
+	tssi->thermal[RF_PATH_A] = map->path_a_therm;
+	tssi->thermal[RF_PATH_B] = map->path_b_therm;
+
+	for (i = 0; i < RF_PATH_NUM_8852B; i++) {
+		memcpy(tssi->tssi_cck[i], ofst[i]->cck_tssi,
+		       sizeof(ofst[i]->cck_tssi));
+
+		for (j = 0; j < TSSI_CCK_CH_GROUP_NUM; j++)
+			rtw89_debug(rtwdev, RTW89_DBG_TSSI,
+				    "[TSSI][EFUSE] path=%d cck[%d]=0x%x\n",
+				    i, j, tssi->tssi_cck[i][j]);
+
+		memcpy(tssi->tssi_mcs[i], ofst[i]->bw40_tssi,
+		       sizeof(ofst[i]->bw40_tssi));
+		memcpy(tssi->tssi_mcs[i] + TSSI_MCS_2G_CH_GROUP_NUM,
+		       ofst[i]->bw40_1s_tssi_5g, sizeof(ofst[i]->bw40_1s_tssi_5g));
+
+		for (j = 0; j < TSSI_MCS_CH_GROUP_NUM; j++)
+			rtw89_debug(rtwdev, RTW89_DBG_TSSI,
+				    "[TSSI][EFUSE] path=%d mcs[%d]=0x%x\n",
+				    i, j, tssi->tssi_mcs[i][j]);
+	}
+}
+
+static bool _decode_efuse_gain(u8 data, s8 *high, s8 *low)
+{
+	if (high)
+		*high = sign_extend32(FIELD_GET(GENMASK(7,  4), data), 3);
+	if (low)
+		*low = sign_extend32(FIELD_GET(GENMASK(3,  0), data), 3);
+
+	return data != 0xff;
+}
+
+static void rtw8852b_efuse_parsing_gain_offset(struct rtw89_dev *rtwdev,
+					       struct rtw8852b_efuse *map)
+{
+	struct rtw89_phy_efuse_gain *gain = &rtwdev->efuse_gain;
+	bool valid = false;
+
+	valid |= _decode_efuse_gain(map->rx_gain_2g_cck,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_2G_CCK],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_2G_CCK]);
+	valid |= _decode_efuse_gain(map->rx_gain_2g_ofdm,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_2G_OFDM],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_2G_OFDM]);
+	valid |= _decode_efuse_gain(map->rx_gain_5g_low,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_5G_LOW],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_5G_LOW]);
+	valid |= _decode_efuse_gain(map->rx_gain_5g_mid,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_5G_MID],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_5G_MID]);
+	valid |= _decode_efuse_gain(map->rx_gain_5g_high,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_5G_HIGH],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_5G_HIGH]);
+
+	gain->offset_valid = valid;
+}
+
+static int rtw8852b_read_efuse(struct rtw89_dev *rtwdev, u8 *log_map)
+{
+	struct rtw89_efuse *efuse = &rtwdev->efuse;
+	struct rtw8852b_efuse *map;
+
+	map = (struct rtw8852b_efuse *)log_map;
+
+	efuse->country_code[0] = map->country_code[0];
+	efuse->country_code[1] = map->country_code[1];
+	rtw8852b_efuse_parsing_tssi(rtwdev, map);
+	rtw8852b_efuse_parsing_gain_offset(rtwdev, map);
+
+	switch (rtwdev->hci.type) {
+	case RTW89_HCI_TYPE_PCIE:
+		rtw8852be_efuse_parsing(efuse, map);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	rtw89_info(rtwdev, "chip rfe_type is %d\n", efuse->rfe_type);
+
+	return 0;
+}
+
 static u32 rtw8852b_bb_cal_txpwr_ref(struct rtw89_dev *rtwdev,
 				     enum rtw89_phy_idx phy_idx, s16 ref)
 {
@@ -269,6 +368,7 @@ static int rtw8852b_mac_disable_bb_rf(struct rtw89_dev *rtwdev)
 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,
 	.set_txpwr		= rtw8852b_set_txpwr,
 	.set_txpwr_ctrl		= rtw8852b_set_txpwr_ctrl,
 	.init_txpwr_unit	= rtw8852b_init_txpwr_unit,
@@ -280,6 +380,12 @@ const struct rtw89_chip_info rtw8852b_chip_info = {
 	.fifo_size		= 196608,
 	.dle_scc_rsvd_size	= 98304,
 	.dle_mem		= rtw8852b_dle_mem_pcie,
+	.sec_ctrl_efuse_size	= 4,
+	.physical_efuse_size	= 1216,
+	.logical_efuse_size	= 2048,
+	.limit_efuse_size	= 1280,
+	.dav_phy_efuse_size	= 96,
+	.dav_log_efuse_size	= 16,
 	.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),

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

@@ -10,4 +10,79 @@
 #define RF_PATH_NUM_8852B 2
 #define BB_PATH_NUM_8852B 2
 
+struct rtw8852b_u_efuse {
+	u8 rsvd[0x88];
+	u8 mac_addr[ETH_ALEN];
+};
+
+struct rtw8852b_e_efuse {
+	u8 mac_addr[ETH_ALEN];
+};
+
+struct rtw8852b_tssi_offset {
+	u8 cck_tssi[TSSI_CCK_CH_GROUP_NUM];
+	u8 bw40_tssi[TSSI_MCS_2G_CH_GROUP_NUM];
+	u8 rsvd[7];
+	u8 bw40_1s_tssi_5g[TSSI_MCS_5G_CH_GROUP_NUM];
+} __packed;
+
+struct rtw8852b_efuse {
+	u8 rsvd[0x210];
+	struct rtw8852b_tssi_offset path_a_tssi;
+	u8 rsvd1[10];
+	struct rtw8852b_tssi_offset path_b_tssi;
+	u8 rsvd2[94];
+	u8 channel_plan;
+	u8 xtal_k;
+	u8 rsvd3;
+	u8 iqk_lck;
+	u8 rsvd4[5];
+	u8 reg_setting:2;
+	u8 tx_diversity:1;
+	u8 rx_diversity:2;
+	u8 ac_mode:1;
+	u8 module_type:2;
+	u8 rsvd5;
+	u8 shared_ant:1;
+	u8 coex_type:3;
+	u8 ant_iso:1;
+	u8 radio_on_off:1;
+	u8 rsvd6:2;
+	u8 eeprom_version;
+	u8 customer_id;
+	u8 tx_bb_swing_2g;
+	u8 tx_bb_swing_5g;
+	u8 tx_cali_pwr_trk_mode;
+	u8 trx_path_selection;
+	u8 rfe_type;
+	u8 country_code[2];
+	u8 rsvd7[3];
+	u8 path_a_therm;
+	u8 path_b_therm;
+	u8 rsvd8[2];
+	u8 rx_gain_2g_ofdm;
+	u8 rsvd9;
+	u8 rx_gain_2g_cck;
+	u8 rsvd10;
+	u8 rx_gain_5g_low;
+	u8 rsvd11;
+	u8 rx_gain_5g_mid;
+	u8 rsvd12;
+	u8 rx_gain_5g_high;
+	u8 rsvd13[35];
+	u8 path_a_cck_pwr_idx[6];
+	u8 path_a_bw40_1tx_pwr_idx[5];
+	u8 path_a_ofdm_1tx_pwr_idx_diff:4;
+	u8 path_a_bw20_1tx_pwr_idx_diff:4;
+	u8 path_a_bw20_2tx_pwr_idx_diff:4;
+	u8 path_a_bw40_2tx_pwr_idx_diff:4;
+	u8 path_a_cck_2tx_pwr_idx_diff:4;
+	u8 path_a_ofdm_2tx_pwr_idx_diff:4;
+	u8 rsvd14[0xf2];
+	union {
+		struct rtw8852b_u_efuse u;
+		struct rtw8852b_e_efuse e;
+	};
+} __packed;
+
 #endif