rtw89: 8852c: rfk: add RCK

RCK is synchronize RC calibration. It needs to be triggered only once when
interface is going to up.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220502235408.15052-6-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -1777,6 +1777,7 @@ static void rtw8852c_rfk_init(struct rtw89_dev *rtwdev)
 	memset(mcc_info, 0, sizeof(*mcc_info));
 	rtw8852c_lck_init(rtwdev);
 
+	rtw8852c_rck(rtwdev);
 	rtw8852c_dack(rtwdev);
 }
 

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c

@@ -470,6 +470,41 @@ static void _dac_cal(struct rtw89_dev *rtwdev, bool force)
 	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[DACK]DACK finish!!!\n");
 }
 
+static void _rck(struct rtw89_dev *rtwdev, enum rtw89_rf_path path)
+{
+	u32 rf_reg5, rck_val = 0;
+	u32 val;
+	int ret;
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RCK] ====== S%d RCK ======\n", path);
+
+	rf_reg5 = rtw89_read_rf(rtwdev, path, RR_RSV1, RFREG_MASK);
+
+	rtw89_write_rf(rtwdev, path, RR_RSV1, RR_RSV1_RST, 0x0);
+	rtw89_write_rf(rtwdev, path, RR_MOD, RR_MOD_MASK, RR_MOD_V_RX);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RCK] RF0x00 = 0x%x\n",
+		    rtw89_read_rf(rtwdev, path, RR_MOD, RFREG_MASK));
+
+	/* RCK trigger */
+	rtw89_write_rf(rtwdev, path, RR_RCKC, RFREG_MASK, 0x00240);
+
+	ret = read_poll_timeout_atomic(rtw89_read_rf, val, val, 2, 20,
+				       false, rtwdev, path, 0x1c, BIT(3));
+	if (ret)
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RCK] RCK timeout\n");
+
+	rck_val = rtw89_read_rf(rtwdev, path, RR_RCKC, RR_RCKC_CA);
+	rtw89_write_rf(rtwdev, path, RR_RCKC, RFREG_MASK, rck_val);
+
+	rtw89_write_rf(rtwdev, path, RR_RSV1, RFREG_MASK, rf_reg5);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK,
+		    "[RCK] RF 0x1b / 0x1c = 0x%x / 0x%x\n",
+		    rtw89_read_rf(rtwdev, path, RR_RCKC, RFREG_MASK),
+		    rtw89_read_rf(rtwdev, path, RR_RCKS, RFREG_MASK));
+}
+
 static void _tssi_set_sys(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy,
 			  enum rtw89_rf_path path)
 {
@@ -1619,6 +1654,14 @@ void rtw8852c_set_channel_rf(struct rtw89_dev *rtwdev,
 			    param->bandwidth);
 }
 
+void rtw8852c_rck(struct rtw89_dev *rtwdev)
+{
+	u8 path;
+
+	for (path = 0; path < 2; path++)
+		_rck(rtwdev, path);
+}
+
 void rtw8852c_dack(struct rtw89_dev *rtwdev)
 {
 	u8 phy_map = rtw89_btc_phymap(rtwdev, RTW89_PHY_0, 0);

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h

@@ -7,6 +7,7 @@
 
 #include "core.h"
 
+void rtw8852c_rck(struct rtw89_dev *rtwdev);
 void rtw8852c_dack(struct rtw89_dev *rtwdev);
 void rtw8852c_tssi(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy);
 void rtw8852c_tssi_scan(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy);