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From: Ping-Ke Shih <pkshih@realtek.com>
To: <linux-wireless@vger.kernel.org>
CC: <leo.li@realtek.com>, <timlee@realtek.com>
Subject: [PATCH 1/2] wifi: rtw89: reset AFEDIG register in power off sequence
Date: Fri, 26 Apr 2024 14:11:59 +0800
Message-ID: <20240426061200.44262-1-pkshih@realtek.com>
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From: Chin-Yen Lee <timlee@realtek.com>

Some Wi-Fi chips meet card lost issue due to unstable hardware signal of
GPIO pins during power off. Reset AFEDIG register before BB reset in
power off sequence could avoid unstable signal and fix the issue.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/rtw8851b.c | 1 +
 drivers/net/wireless/realtek/rtw89/rtw8852b.c | 2 ++
 drivers/net/wireless/realtek/rtw89/rtw8852c.c | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8851b.c b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
index 2e89c18fbf19..87b51823244d 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8851b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
@@ -2320,6 +2320,7 @@ static int rtw8851b_mac_disable_bb_rf(struct rtw89_dev *rtwdev)
 	u8 wl_rfc_s1;
 	int ret;
 
+	rtw89_write32_clr(rtwdev, R_AX_WLRF_CTRL, B_AX_AFC_AFEDIG);
 	rtw89_write8_clr(rtwdev, R_AX_SYS_FUNC_EN,
 			 B_AX_FEN_BBRSTB | B_AX_FEN_BB_GLB_RSTN);
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b.c b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
index 85908c55baa9..eebff5e6b403 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
@@ -550,6 +550,7 @@ static int rtw8852b_pwr_off_func(struct rtw89_dev *rtwdev)
 		return ret;
 
 	rtw89_write32_set(rtwdev, R_AX_SYS_PW_CTRL, B_AX_EN_WLON);
+	rtw89_write32_clr(rtwdev, R_AX_WLRF_CTRL, B_AX_AFC_AFEDIG);
 	rtw89_write8_clr(rtwdev, R_AX_SYS_FUNC_EN, B_AX_FEN_BB_GLB_RSTN | B_AX_FEN_BBRSTB);
 	rtw89_write32_clr(rtwdev, R_AX_SYS_ADIE_PAD_PWR_CTRL, B_AX_SYM_PADPDN_WL_RFC_1P3);
 
@@ -2469,6 +2470,7 @@ static int rtw8852b_mac_disable_bb_rf(struct rtw89_dev *rtwdev)
 	u8 wl_rfc_s1;
 	int ret;
 
+	rtw89_write32_clr(rtwdev, R_AX_WLRF_CTRL, B_AX_AFC_AFEDIG);
 	rtw89_write8_clr(rtwdev, R_AX_SYS_FUNC_EN,
 			 B_AX_FEN_BBRSTB | B_AX_FEN_BB_GLB_RSTN);
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index db354afc486e..efc772eb79a4 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -338,6 +338,7 @@ static int rtw8852c_pwr_off_func(struct rtw89_dev *rtwdev)
 		return ret;
 
 	rtw89_write32_set(rtwdev, R_AX_SYS_PW_CTRL, B_AX_EN_WLON);
+	rtw89_write32_clr(rtwdev, R_AX_WLRF_CTRL, B_AX_AFC_AFEDIG);
 	rtw89_write8_clr(rtwdev, R_AX_SYS_FUNC_EN, B_AX_FEN_BB_GLB_RSTN | B_AX_FEN_BBRSTB);
 	rtw89_write32_clr(rtwdev, R_AX_SYS_ISO_CTRL_EXTEND,
 			  B_AX_R_SYM_FEN_WLBBGLB_1 | B_AX_R_SYM_FEN_WLBBFUN_1);
@@ -2816,6 +2817,7 @@ static int rtw8852c_mac_enable_bb_rf(struct rtw89_dev *rtwdev)
 
 static int rtw8852c_mac_disable_bb_rf(struct rtw89_dev *rtwdev)
 {
+	rtw89_write32_clr(rtwdev, R_AX_WLRF_CTRL, B_AX_AFC_AFEDIG);
 	rtw89_write8_clr(rtwdev, R_AX_SYS_FUNC_EN,
 			 B_AX_FEN_BBRSTB | B_AX_FEN_BB_GLB_RSTN);
 
-- 
2.25.1