rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal

Currently all realtek wifi chip is set to check CRC of VHT-SIG-B
in 802.11ac signal, but some AP don't calculate the CRC and packets
from these AP can't be received and lead to disconnection.
We disable the check defaultly to avoid this case.
Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211217012421.7859-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/bf.c

@@ -130,7 +130,8 @@ void rtw_bf_cfg_sounding(struct rtw_dev *rtwdev, struct rtw_vif *vif,
 		  BIT_WMAC_USE_NDPARATE |
 		  (csi_rsc << 13);
 
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_SOUNDING);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_SOUNDING);
 	rtw_write8(rtwdev, REG_SND_PTCL_CTRL + 3, 0x26);
 	rtw_write8_clr(rtwdev, REG_RXFLTMAP1, BIT_RXFLTMAP1_BF_REPORT_POLL);
 	rtw_write8_clr(rtwdev, REG_RXFLTMAP4, BIT_RXFLTMAP4_BF_REPORT_POLL);
@@ -177,7 +178,7 @@ void rtw_bf_del_bfer_entry_mu(struct rtw_dev *rtwdev)
 
 void rtw_bf_del_sounding(struct rtw_dev *rtwdev)
 {
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, 0);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM, 0);
 }
 
 void rtw_bf_enable_bfee_su(struct rtw_dev *rtwdev, struct rtw_vif *vif,
@@ -204,7 +205,8 @@ void rtw_bf_enable_bfee_su(struct rtw_dev *rtwdev, struct rtw_vif *vif,
 	}
 
 	/* Sounding protocol control */
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_SOUNDING);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_SOUNDING);
 
 	/* MAC address/Partial AID of Beamformer */
 	for (i = 0; i < ETH_ALEN; i++)
@@ -273,7 +275,8 @@ void rtw_bf_remove_bfee_su(struct rtw_dev *rtwdev,
 	struct rtw_bf_info *bfinfo = &rtwdev->bf_info;
 
 	rtw_dbg(rtwdev, RTW_DBG_BF, "remove as a su bfee\n");
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_REMOVE);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_REMOVE);
 
 	switch (bfee->su_reg_index) {
 	case 0:
@@ -298,7 +301,8 @@ void rtw_bf_remove_bfee_mu(struct rtw_dev *rtwdev,
 {
 	struct rtw_bf_info *bfinfo = &rtwdev->bf_info;
 
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_REMOVE);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_REMOVE);
 
 	rtw_bf_del_bfer_entry_mu(rtwdev);
 

drivers/net/wireless/realtek/rtw88/bf.h

@@ -13,6 +13,9 @@
 #define REG_ASSOCIATED_BFMER1_INFO	0x06EC
 #define REG_TX_CSI_RPT_PARAM_BW20	0x06F4
 #define REG_SND_PTCL_CTRL		0x0718
+#define BIT_DIS_CHK_VHTSIGB_CRC		BIT(6)
+#define BIT_DIS_CHK_VHTSIGA_CRC		BIT(5)
+#define BIT_MASK_BEAMFORM		(GENMASK(4, 0) | BIT(7))
 #define REG_MU_TX_CTL			0x14C0
 #define REG_MU_STA_GID_VLD		0x14C4
 #define REG_MU_STA_USER_POS_INFO	0x14C8
@@ -42,8 +45,8 @@
 #define BIT_RXFLTMAP4_BF_REPORT_POLL	BIT(4)
 
 #define RTW_NDP_RX_STANDBY_TIME	0x70
-#define RTW_SND_CTRL_REMOVE	0xD8
-#define RTW_SND_CTRL_SOUNDING	0xDB
+#define RTW_SND_CTRL_REMOVE	0x98
+#define RTW_SND_CTRL_SOUNDING	0x9B
 
 enum csi_seg_len {
 	HAL_CSI_SEG_4K = 0,

drivers/net/wireless/realtek/rtw88/rtw8821c.c

@@ -223,7 +223,8 @@ static int rtw8821c_mac_init(struct rtw_dev *rtwdev)
 	rtw_write8(rtwdev, REG_TCR + 1, WLAN_TX_FUNC_CFG1);
 	rtw_write8(rtwdev, REG_ACKTO_CCK, 0x40);
 	rtw_write8_set(rtwdev, REG_WMAC_TRXPTCL_CTL_H, BIT(1));
-	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL, BIT(6));
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 	rtw_write32(rtwdev, REG_WMAC_OPTION_FUNCTION + 8, WLAN_MAC_OPT_FUNC2);
 	rtw_write8(rtwdev, REG_WMAC_OPTION_FUNCTION + 4, WLAN_MAC_OPT_NORM_FUNC1);
 

drivers/net/wireless/realtek/rtw88/rtw8822b.c

@@ -262,6 +262,8 @@ static int rtw8822b_mac_init(struct rtw_dev *rtwdev)
 	rtw_write8(rtwdev, REG_TCR + 1, WLAN_TX_FUNC_CFG1);
 	rtw_write32(rtwdev, REG_WMAC_OPTION_FUNCTION + 8, WLAN_MAC_OPT_FUNC2);
 	rtw_write8(rtwdev, REG_WMAC_OPTION_FUNCTION + 4, WLAN_MAC_OPT_NORM_FUNC1);
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 
 	return 0;
 }

drivers/net/wireless/realtek/rtw88/rtw8822c.c

@@ -2102,6 +2102,8 @@ static int rtw8822c_mac_init(struct rtw_dev *rtwdev)
 		     BIT_RXPSF_CONT_ERRCHKEN);
 	value16 = BIT_SET_RXPSF_ERRTHR(value16, 0x07);
 	rtw_write16(rtwdev, REG_RXPSF_CTRL, value16);
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 
 	/* Interrupt migration configuration */
 	rtw_write32(rtwdev, REG_INT_MIG, WLAN_MAC_INT_MIG_CFG);