wifi: rtw89: 8852c: add quirk to set PCI BER for certain platforms

Increase PCI BER (bit error rate) count depth setting which could increase
PHY circuit fault tolerance and improve compatibility.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://msgid.link/20240329015251.22762-4-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.c

@@ -4069,6 +4069,24 @@ void rtw89_core_ntfy_btc_event(struct rtw89_dev *rtwdev, enum rtw89_btc_hmsg eve
 	}
 }
 
+void rtw89_check_quirks(struct rtw89_dev *rtwdev, const struct dmi_system_id *quirks)
+{
+	const struct dmi_system_id *match;
+	enum rtw89_quirks quirk;
+
+	if (!quirks)
+		return;
+
+	for (match = dmi_first_match(quirks); match; match = dmi_first_match(match + 1)) {
+		quirk = (uintptr_t)match->driver_data;
+		if (quirk >= NUM_OF_RTW89_QUIRKS)
+			continue;
+
+		set_bit(quirk, rtwdev->quirks);
+	}
+}
+EXPORT_SYMBOL(rtw89_check_quirks);
+
 int rtw89_core_start(struct rtw89_dev *rtwdev)
 {
 	int ret;

drivers/net/wireless/realtek/rtw89/core.h

@@ -7,6 +7,7 @@
 
 #include <linux/average.h>
 #include <linux/bitfield.h>
+#include <linux/dmi.h>
 #include <linux/firmware.h>
 #include <linux/iopoll.h>
 #include <linux/workqueue.h>
@@ -4080,6 +4081,7 @@ union rtw89_bus_info {
 
 struct rtw89_driver_info {
 	const struct rtw89_chip_info *chip;
+	const struct dmi_system_id *quirks;
 	union rtw89_bus_info bus;
 };
 
@@ -4427,6 +4429,12 @@ enum rtw89_flags {
 	NUM_OF_RTW89_FLAGS,
 };
 
+enum rtw89_quirks {
+	RTW89_QUIRK_PCI_BER,
+
+	NUM_OF_RTW89_QUIRKS,
+};
+
 enum rtw89_pkt_drop_sel {
 	RTW89_PKT_DROP_SEL_MACID_BE_ONCE,
 	RTW89_PKT_DROP_SEL_MACID_BK_ONCE,
@@ -5187,6 +5195,7 @@ struct rtw89_dev {
 	DECLARE_BITMAP(mac_id_map, RTW89_MAX_MAC_ID_NUM);
 	DECLARE_BITMAP(flags, NUM_OF_RTW89_FLAGS);
 	DECLARE_BITMAP(pkt_offload, RTW89_MAX_PKT_OFLD_NUM);
+	DECLARE_BITMAP(quirks, NUM_OF_RTW89_QUIRKS);
 
 	struct rtw89_phy_stat phystat;
 	struct rtw89_rfk_wait_info rfk_wait;
@@ -6232,6 +6241,7 @@ int rtw89_core_sta_remove(struct rtw89_dev *rtwdev,
 void rtw89_core_set_tid_config(struct rtw89_dev *rtwdev,
 			       struct ieee80211_sta *sta,
 			       struct cfg80211_tid_config *tid_config);
+void rtw89_check_quirks(struct rtw89_dev *rtwdev, const struct dmi_system_id *quirks);
 int rtw89_core_init(struct rtw89_dev *rtwdev);
 void rtw89_core_deinit(struct rtw89_dev *rtwdev);
 int rtw89_core_register(struct rtw89_dev *rtwdev);

drivers/net/wireless/realtek/rtw89/pci.c

@@ -2298,6 +2298,22 @@ static int rtw89_pci_deglitch_setting(struct rtw89_dev *rtwdev)
 	return 0;
 }
 
+static void rtw89_pci_ber(struct rtw89_dev *rtwdev)
+{
+	u32 phy_offset;
+
+	if (!test_bit(RTW89_QUIRK_PCI_BER, rtwdev->quirks))
+		return;
+
+	phy_offset = R_RAC_DIRECT_OFFSET_G1;
+	rtw89_write16(rtwdev, phy_offset + RAC_ANA1E * RAC_MULT, RAC_ANA1E_G1_VAL);
+	rtw89_write16(rtwdev, phy_offset + RAC_ANA2E * RAC_MULT, RAC_ANA2E_VAL);
+
+	phy_offset = R_RAC_DIRECT_OFFSET_G2;
+	rtw89_write16(rtwdev, phy_offset + RAC_ANA1E * RAC_MULT, RAC_ANA1E_G2_VAL);
+	rtw89_write16(rtwdev, phy_offset + RAC_ANA2E * RAC_MULT, RAC_ANA2E_VAL);
+}
+
 static void rtw89_pci_rxdma_prefth(struct rtw89_dev *rtwdev)
 {
 	if (rtwdev->chip->chip_id != RTL8852A)
@@ -2695,6 +2711,7 @@ static int rtw89_pci_ops_mac_pre_init_ax(struct rtw89_dev *rtwdev)
 	const struct rtw89_pci_info *info = rtwdev->pci_info;
 	int ret;
 
+	rtw89_pci_ber(rtwdev);
 	rtw89_pci_rxdma_prefth(rtwdev);
 	rtw89_pci_l1off_pwroff(rtwdev);
 	rtw89_pci_deglitch_setting(rtwdev);
@@ -4171,6 +4188,8 @@ int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	rtwdev->hci.rpwm_addr = pci_info->rpwm_addr;
 	rtwdev->hci.cpwm_addr = pci_info->cpwm_addr;
 
+	rtw89_check_quirks(rtwdev, info->quirks);
+
 	SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev);
 
 	ret = rtw89_core_init(rtwdev);

drivers/net/wireless/realtek/rtw89/pci.h

@@ -26,11 +26,16 @@
 #define RAC_REG_FLD_0			0x1D
 #define BAC_AUTOK_N_MASK		GENMASK(3, 2)
 #define PCIE_AUTOK_4			0x3
+#define RAC_ANA1E			0x1E
+#define RAC_ANA1E_G1_VAL		0x66EA
+#define RAC_ANA1E_G2_VAL		0x6EEA
 #define RAC_ANA1F			0x1F
 #define RAC_ANA24			0x24
 #define B_AX_DEGLITCH			GENMASK(11, 8)
 #define RAC_ANA26			0x26
 #define B_AX_RXEN			GENMASK(15, 14)
+#define RAC_ANA2E			0x2E
+#define RAC_ANA2E_VAL			0xFFFE
 #define RAC_CTRL_PPR_V1			0x30
 #define B_AX_CLK_CALIB_EN		BIT(12)
 #define B_AX_CALIB_EN			BIT(13)

drivers/net/wireless/realtek/rtw89/rtw8851be.c

@@ -63,6 +63,7 @@ static const struct rtw89_pci_info rtw8851b_pci_info = {
 
 static const struct rtw89_driver_info rtw89_8851be_info = {
 	.chip = &rtw8851b_chip_info,
+	.quirks = NULL,
 	.bus = {
 		.pci = &rtw8851b_pci_info,
 	},

drivers/net/wireless/realtek/rtw89/rtw8852ae.c

@@ -61,6 +61,7 @@ static const struct rtw89_pci_info rtw8852a_pci_info = {
 
 static const struct rtw89_driver_info rtw89_8852ae_info = {
 	.chip = &rtw8852a_chip_info,
+	.quirks = NULL,
 	.bus = {
 		.pci = &rtw8852a_pci_info,
 	},

drivers/net/wireless/realtek/rtw89/rtw8852be.c

@@ -63,6 +63,7 @@ static const struct rtw89_pci_info rtw8852b_pci_info = {
 
 static const struct rtw89_driver_info rtw89_8852be_info = {
 	.chip = &rtw8852b_chip_info,
+	.quirks = NULL,
 	.bus = {
 		.pci = &rtw8852b_pci_info,
 	},

drivers/net/wireless/realtek/rtw89/rtw8852ce.c

@@ -68,8 +68,31 @@ static const struct rtw89_pci_info rtw8852c_pci_info = {
 	.recognize_intrs	= rtw89_pci_recognize_intrs_v1,
 };
 
+static const struct dmi_system_id rtw8852c_pci_quirks[] = {
+	{
+		.ident = "Dell Inc. Vostro 16 5640",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 16 5640"),
+			DMI_MATCH(DMI_PRODUCT_SKU, "0CA0"),
+		},
+		.driver_data = (void *)RTW89_QUIRK_PCI_BER,
+	},
+	{
+		.ident = "Dell Inc. Inspiron 16 5640",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 16 5640"),
+			DMI_MATCH(DMI_PRODUCT_SKU, "0C9F"),
+		},
+		.driver_data = (void *)RTW89_QUIRK_PCI_BER,
+	},
+	{},
+};
+
 static const struct rtw89_driver_info rtw89_8852ce_info = {
 	.chip = &rtw8852c_chip_info,
+	.quirks = rtw8852c_pci_quirks,
 	.bus = {
 		.pci = &rtw8852c_pci_info,
 	},

drivers/net/wireless/realtek/rtw89/rtw8922ae.c

@@ -61,6 +61,7 @@ static const struct rtw89_pci_info rtw8922a_pci_info = {
 
 static const struct rtw89_driver_info rtw89_8922ae_info = {
 	.chip = &rtw8922a_chip_info,
+	.quirks = NULL,
 	.bus = {
 		.pci = &rtw8922a_pci_info,
 	},