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Date: Tue, 27 Feb 2024 14:19:17 +0200
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From: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Subject: [PATCH 2/4] wifi: rtw88: 8821cu: Fix connection failure
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Cc: Ping-Ke Shih <pkshih@realtek.com>, Sascha Hauer <sha@pengutronix.de>
References: <909d9f75-44cd-4710-9d3f-56691fd58090@gmail.com>
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In-Reply-To: <909d9f75-44cd-4710-9d3f-56691fd58090@gmail.com>
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Clear bit 8 of REG_SYS_STATUS1 after MAC power on.

Without this, some RTL8821CU and RTL8811CU cannot connect to any
network:

Feb 19 13:33:11 ideapad2 kernel: wlp3s0f3u2: send auth to
	90:55:de:__:__:__ (try 1/3)
Feb 19 13:33:13 ideapad2 kernel: wlp3s0f3u2: send auth to
	90:55:de:__:__:__ (try 2/3)
Feb 19 13:33:14 ideapad2 kernel: wlp3s0f3u2: send auth to
	90:55:de:__:__:__ (try 3/3)
Feb 19 13:33:15 ideapad2 kernel: wlp3s0f3u2: authentication with
	90:55:de:__:__:__ timed out

The RTL8822CU and RTL8822BU out-of-tree drivers do this as well, so do
it for all three types of chips.

Tested with RTL8811CU (Tenda U9 V2.0).

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
 drivers/net/wireless/realtek/rtw88/mac.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c
index 298663b03580..a3b2c57c5503 100644
--- a/drivers/net/wireless/realtek/rtw88/mac.c
+++ b/drivers/net/wireless/realtek/rtw88/mac.c
@@ -309,6 +309,14 @@ static int rtw_mac_power_switch(struct rtw_dev *rtwdev, bool pwr_on)
 	pwr_seq = pwr_on ? chip->pwr_on_seq : chip->pwr_off_seq;
 	ret = rtw_pwr_seq_parser(rtwdev, pwr_seq);
 
+	if (pwr_seq == chip->pwr_on_seq &&
+	    rtw_hci_type(rtwdev) == RTW_HCI_TYPE_USB) {
+		if (chip->id == RTW_CHIP_TYPE_8822C ||
+		    chip->id == RTW_CHIP_TYPE_8822B ||
+		    chip->id == RTW_CHIP_TYPE_8821C)
+			rtw_write8_clr(rtwdev, REG_SYS_STATUS1 + 1, BIT(0));
+	}
+
 	if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_SDIO)
 		rtw_write32(rtwdev, REG_SDIO_HIMR, imr);
 
-- 
2.43.2