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From:   Ping-Ke Shih <pkshih@realtek.com>
To:     <kvalo@kernel.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH 2/5] wifi: rtw89: 8852b: rfk: add RCK
Date:   Wed, 12 Oct 2022 16:32:31 +0800
Message-ID: <20221012083234.20224-3-pkshih@realtek.com>
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RCK is synchronize RC calibration. Driver triggers this calibration and
sets the result to register. This calibration is needed once when interface
is going to up.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 .../net/wireless/realtek/rtw89/rtw8852b_rfk.c | 43 +++++++++++++++++++
 .../net/wireless/realtek/rtw89/rtw8852b_rfk.h |  1 +
 2 files changed, 44 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c
index 5c35f4fb38ff5..1dcb900ef7007 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c
@@ -32,6 +32,41 @@ static u8 _kpath(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 	return val;
 }
 
+static void _rck(struct rtw89_dev *rtwdev, enum rtw89_rf_path path)
+{
+	u32 rf_reg5;
+	u32 rck_val;
+	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%05x\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, 30,
+				       false, rtwdev, path, RR_RCKS, BIT(3));
+
+	rck_val = rtw89_read_rf(rtwdev, path, RR_RCKC, RR_RCKC_CA);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RCK] rck_val = 0x%x, ret = %d\n",
+		    rck_val, ret);
+
+	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 = 0x%x\n",
+		    rtw89_read_rf(rtwdev, path, RR_RCKC, RFREG_MASK));
+}
+
 static void _afe_init(struct rtw89_dev *rtwdev)
 {
 	rtw89_write32(rtwdev, R_AX_PHYREG_SET, 0xf);
@@ -453,6 +488,14 @@ static void _dac_cal(struct rtw89_dev *rtwdev, bool force)
 	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[DACK]DACK finish!!!\n");
 }
 
+void rtw8852b_rck(struct rtw89_dev *rtwdev)
+{
+	u8 path;
+
+	for (path = 0; path < RF_PATH_NUM_8852B; path++)
+		_rck(rtwdev, path);
+}
+
 void rtw8852b_dack(struct rtw89_dev *rtwdev)
 {
 	u8 phy_map = rtw89_btc_phymap(rtwdev, RTW89_PHY_0, 0);
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.h b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.h
index bc2ff7380b927..84325abc7f2c2 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.h
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.h
@@ -7,6 +7,7 @@
 
 #include "core.h"
 
+void rtw8852b_rck(struct rtw89_dev *rtwdev);
 void rtw8852b_dack(struct rtw89_dev *rtwdev);
 void rtw8852b_set_channel_rf(struct rtw89_dev *rtwdev,
 			     const struct rtw89_chan *chan,
-- 
2.25.1