rtw89: phy: handle txpwr lmt/lmt_ru of 6G band

Add declarations of 6G stuff and extend rtw89_channel_to_idx() to
map 6G's channels to 6G channel indexes. While 6G, correspondingly
read 6G's entry for tx power limit and limit_ru.

After this, we should pay attention to chip_info::support_bands.
If a chip declares 6G support, it must configure txpwr_lmt_6g and
txpwr_lmt_ru_6g in case accessing NULL pointer while setting tx power
limit/limit_ru on 6G band.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220218034017.9160-2-pkshih@realtek.com

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

@@ -371,6 +371,25 @@ enum rtw89_hw_rate {
  */
 #define RTW89_5G_CH_NUM 53
 
+/* 6G channels,
+ * 1, 3, 5, 7, 9, 11, 13, 15,
+ * 17, 19, 21, 23, 25, 27, 29, 33,
+ * 35, 37, 39, 41, 43, 45, 47, 49,
+ * 51, 53, 55, 57, 59, 61, 65, 67,
+ * 69, 71, 73, 75, 77, 79, 81, 83,
+ * 85, 87, 89, 91, 93, 97, 99, 101,
+ * 103, 105, 107, 109, 111, 113, 115, 117,
+ * 119, 121, 123, 125, 129, 131, 133, 135,
+ * 137, 139, 141, 143, 145, 147, 149, 151,
+ * 153, 155, 157, 161, 163, 165, 167, 169,
+ * 171, 173, 175, 177, 179, 181, 183, 185,
+ * 187, 189, 193, 195, 197, 199, 201, 203,
+ * 205, 207, 209, 211, 213, 215, 217, 219,
+ * 221, 225, 227, 229, 231, 233, 235, 237,
+ * 239, 241, 243, 245, 247, 249, 251, 253,
+ */
+#define RTW89_6G_CH_NUM 120
+
 enum rtw89_rate_section {
 	RTW89_RS_CCK,
 	RTW89_RS_OFDM,
@@ -554,6 +573,7 @@ enum rtw89_ps_mode {
 
 #define RTW89_2G_BW_NUM (RTW89_CHANNEL_WIDTH_40 + 1)
 #define RTW89_5G_BW_NUM (RTW89_CHANNEL_WIDTH_80 + 1)
+#define RTW89_6G_BW_NUM (RTW89_CHANNEL_WIDTH_160 + 1)
 #define RTW89_PPE_BW_NUM (RTW89_CHANNEL_WIDTH_80 + 1)
 
 enum rtw89_ru_bandwidth {
@@ -2246,10 +2266,15 @@ struct rtw89_chip_info {
 	const s8 (*txpwr_lmt_5g)[RTW89_5G_BW_NUM][RTW89_NTX_NUM]
 				[RTW89_RS_LMT_NUM][RTW89_BF_NUM]
 				[RTW89_REGD_NUM][RTW89_5G_CH_NUM];
+	const s8 (*txpwr_lmt_6g)[RTW89_6G_BW_NUM][RTW89_NTX_NUM]
+				[RTW89_RS_LMT_NUM][RTW89_BF_NUM]
+				[RTW89_REGD_NUM][RTW89_6G_CH_NUM];
 	const s8 (*txpwr_lmt_ru_2g)[RTW89_RU_NUM][RTW89_NTX_NUM]
 				   [RTW89_REGD_NUM][RTW89_2G_CH_NUM];
 	const s8 (*txpwr_lmt_ru_5g)[RTW89_RU_NUM][RTW89_NTX_NUM]
 				   [RTW89_REGD_NUM][RTW89_5G_CH_NUM];
+	const s8 (*txpwr_lmt_ru_6g)[RTW89_RU_NUM][RTW89_NTX_NUM]
+				   [RTW89_REGD_NUM][RTW89_6G_CH_NUM];
 
 	u8 txpwr_factor_rf;
 	u8 txpwr_factor_mac;

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

@@ -1115,8 +1115,36 @@ s8 rtw89_phy_read_txpwr_byrate(struct rtw89_dev *rtwdev,
 }
 EXPORT_SYMBOL(rtw89_phy_read_txpwr_byrate);
 
-static u8 rtw89_channel_to_idx(struct rtw89_dev *rtwdev, u8 channel)
+static u8 rtw89_channel_6g_to_idx(struct rtw89_dev *rtwdev, u8 channel_6g)
+{
+	switch (channel_6g) {
+	case 1 ... 29:
+		return (channel_6g - 1) / 2;
+	case 33 ... 61:
+		return (channel_6g - 3) / 2;
+	case 65 ... 93:
+		return (channel_6g - 5) / 2;
+	case 97 ... 125:
+		return (channel_6g - 7) / 2;
+	case 129 ... 157:
+		return (channel_6g - 9) / 2;
+	case 161 ... 189:
+		return (channel_6g - 11) / 2;
+	case 193 ... 221:
+		return (channel_6g - 13) / 2;
+	case 225 ... 253:
+		return (channel_6g - 15) / 2;
+	default:
+		rtw89_warn(rtwdev, "unknown 6g channel: %d\n", channel_6g);
+		return 0;
+	}
+}
+
+static u8 rtw89_channel_to_idx(struct rtw89_dev *rtwdev, u8 band, u8 channel)
 {
+	if (band == RTW89_BAND_6G)
+		return rtw89_channel_6g_to_idx(rtwdev, channel);
+
 	switch (channel) {
 	case 1 ... 14:
 		return channel - 1;
@@ -1136,8 +1164,8 @@ s8 rtw89_phy_read_txpwr_limit(struct rtw89_dev *rtwdev,
 			      u8 bw, u8 ntx, u8 rs, u8 bf, u8 ch)
 {
 	const struct rtw89_chip_info *chip = rtwdev->chip;
-	u8 ch_idx = rtw89_channel_to_idx(rtwdev, ch);
 	u8 band = rtwdev->hal.current_band_type;
+	u8 ch_idx = rtw89_channel_to_idx(rtwdev, band, ch);
 	u8 regd = rtw89_regd_get(rtwdev, band);
 	s8 lmt = 0, sar;
 
@@ -1154,6 +1182,12 @@ s8 rtw89_phy_read_txpwr_limit(struct rtw89_dev *rtwdev,
 			lmt = (*chip->txpwr_lmt_5g)[bw][ntx][rs][bf]
 						   [RTW89_WW][ch_idx];
 		break;
+	case RTW89_BAND_6G:
+		lmt = (*chip->txpwr_lmt_6g)[bw][ntx][rs][bf][regd][ch_idx];
+		if (!lmt)
+			lmt = (*chip->txpwr_lmt_6g)[bw][ntx][rs][bf]
+						   [RTW89_WW][ch_idx];
+		break;
 	default:
 		rtw89_warn(rtwdev, "unknown band type: %d\n", band);
 		return 0;
@@ -1269,8 +1303,8 @@ static s8 rtw89_phy_read_txpwr_limit_ru(struct rtw89_dev *rtwdev,
 					u8 ru, u8 ntx, u8 ch)
 {
 	const struct rtw89_chip_info *chip = rtwdev->chip;
-	u8 ch_idx = rtw89_channel_to_idx(rtwdev, ch);
 	u8 band = rtwdev->hal.current_band_type;
+	u8 ch_idx = rtw89_channel_to_idx(rtwdev, band, ch);
 	u8 regd = rtw89_regd_get(rtwdev, band);
 	s8 lmt_ru = 0, sar;
 
@@ -1287,6 +1321,12 @@ static s8 rtw89_phy_read_txpwr_limit_ru(struct rtw89_dev *rtwdev,
 			lmt_ru = (*chip->txpwr_lmt_ru_5g)[ru][ntx]
 							 [RTW89_WW][ch_idx];
 		break;
+	case RTW89_BAND_6G:
+		lmt_ru = (*chip->txpwr_lmt_ru_6g)[ru][ntx][regd][ch_idx];
+		if (!lmt_ru)
+			lmt_ru = (*chip->txpwr_lmt_ru_6g)[ru][ntx]
+							 [RTW89_WW][ch_idx];
+		break;
 	default:
 		rtw89_warn(rtwdev, "unknown band type: %d\n", band);
 		return 0;