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From:   Ping-Ke Shih <pkshih@realtek.com>
To:     <kvalo@kernel.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH v3 5/8] rtw89: 8852c: rfk: add RCK
Date:   Tue, 3 May 2022 07:54:05 +0800
Message-ID: <20220502235408.15052-6-pkshih@realtek.com>
In-Reply-To: <20220502235408.15052-1-pkshih@realtek.com>
References: <20220502235408.15052-1-pkshih@realtek.com>
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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>
---
 drivers/net/wireless/realtek/rtw89/rtw8852c.c |  1 +
 .../net/wireless/realtek/rtw89/rtw8852c_rfk.c | 43 +++++++++++++++++++
 .../net/wireless/realtek/rtw89/rtw8852c_rfk.h |  1 +
 3 files changed, 45 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 36406488e60e4..6db61e6df1ff0 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/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);
 }
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c
index 974bb5794ad9f..4025245cd7e6b 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c
+++ b/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);
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h
index a16ad9305ba42..faacdf17a9286 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h
+++ b/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);
-- 
2.25.1