misc: rtsx: Add support for RTS5264 Version B and optimize init flow

This patch adds support for the Realtek RTS5264 Version B
card reader controller.
To support this chip revision, the driver introduces specific
initialization logic to handle the hardware requirements of
Version B. The probe flow is updated to detect this version
and apply the necessary register configurations.
Additionally, the initialization sequence for Version B has
been optimized to improve robustness and ensure proper device
setup during power-on.
These changes ensure correct operation and compatibility with
systems using RTS5264 Version B.

Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20250620071325.1887017-1-ricky_wu@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/cardreader/rts5264.c

@@ -413,8 +413,8 @@ static void rts5264_init_from_hw(struct rtsx_pcr *pcr)
 {
 	struct pci_dev *pdev = pcr->pci;
 	u32 lval1, lval2, i;
-	u16 setting_reg1, setting_reg2;
+	u16 setting_reg1, setting_reg2, phy_val;
-	u8 valid, efuse_valid, tmp;
+	u8 valid, efuse_valid, tmp, efuse_len;
 
 	rtsx_pci_write_register(pcr, RTS5264_REG_PME_FORCE_CTL,
 		REG_EFUSE_POR | REG_EFUSE_POWER_MASK,
@@ -433,6 +433,8 @@ static void rts5264_init_from_hw(struct rtsx_pcr *pcr)
 			break;
 	}
 	rtsx_pci_read_register(pcr, RTS5264_EFUSE_READ_DATA, &tmp);
+	efuse_len = ((tmp & 0x70) >> 4);
+	pcr_dbg(pcr, "Load efuse len: 0x%x\n", efuse_len);
 	efuse_valid = ((tmp & 0x0C) >> 2);
 	pcr_dbg(pcr, "Load efuse valid: 0x%x\n", efuse_valid);
 
@@ -445,6 +447,58 @@ static void rts5264_init_from_hw(struct rtsx_pcr *pcr)
 		REG_EFUSE_POR, 0);
 	pcr_dbg(pcr, "Disable efuse por!\n");
 
+	if (is_version(pcr, PID_5264, RTS5264_IC_VER_B)) {
+		pci_write_config_dword(pdev, 0x718, 0x0007C000);
+		rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE, 0xFF, 0x88);
+		rtsx_pci_read_phy_register(pcr, _PHY_REV0, &phy_val);
+		phy_val &= 0xFFFD;
+
+		if (efuse_len == 0) {
+			rtsx_pci_write_register(pcr, RTS5264_FW_CFG_INFO2, 0x0F, 0x0F);
+			rtsx_pci_write_register(pcr, 0xFF14, 0xFF, 0x79);
+			rtsx_pci_write_register(pcr, 0xFF15, 0xFF, 0xFF);
+			rtsx_pci_write_register(pcr, 0xFF16, 0xFF, 0x3D);
+			rtsx_pci_write_register(pcr, 0xFF17, 0xFF, 0xFE);
+
+			rtsx_pci_write_register(pcr, 0xFF18, 0xFF, 0x5B);
+			rtsx_pci_write_register(pcr, 0xFF19, 0xFF, 0xFF);
+			rtsx_pci_write_register(pcr, 0xFF1A, 0xFF, 0x3E);
+			rtsx_pci_write_register(pcr, 0xFF1B, 0xFF, 0xFE);
+
+			rtsx_pci_write_register(pcr, 0xFF1C, 0xFF, 0x00);
+			rtsx_pci_write_register(pcr, 0xFF1D, 0xFF, 0xFF);
+			rtsx_pci_write_register(pcr, 0xFF1E, 0xFF, 0x3F);
+			rtsx_pci_write_register(pcr, 0xFF1F, 0xFF, 0xFE);
+
+			rtsx_pci_write_register(pcr, 0xFF20, 0xFF, 0x81);
+			rtsx_pci_write_register(pcr, 0xFF21, 0xFF, 0xFF);
+			rtsx_pci_write_register(pcr, 0xFF22, 0xFF, 0x3C);
+			rtsx_pci_write_register(pcr, 0xFF23, 0xFF, 0xFE);
+		}
+
+		rtsx_pci_write_register(pcr, 0xFF24, 0xFF, 0x79);
+		rtsx_pci_write_register(pcr, 0xFF25, 0xFF, 0x5B);
+		rtsx_pci_write_register(pcr, 0xFF26, 0xFF, 0x00);
+		rtsx_pci_write_register(pcr, 0xFF27, 0xFF, 0x40);
+
+		rtsx_pci_write_register(pcr, 0xFF28, 0xFF, (u8)phy_val);
+		rtsx_pci_write_register(pcr, 0xFF29, 0xFF, (u8)(phy_val >> 8));
+		rtsx_pci_write_register(pcr, 0xFF2A, 0xFF, 0x19);
+		rtsx_pci_write_register(pcr, 0xFF2B, 0xFF, 0x40);
+
+		rtsx_pci_write_register(pcr, 0xFF2C, 0xFF, 0x20);
+		rtsx_pci_write_register(pcr, 0xFF2D, 0xFF, 0xDA);
+		rtsx_pci_write_register(pcr, 0xFF2E, 0xFF, 0x0A);
+		rtsx_pci_write_register(pcr, 0xFF2F, 0xFF, 0x40);
+
+		rtsx_pci_write_register(pcr, 0xFF30, 0xFF, 0x20);
+		rtsx_pci_write_register(pcr, 0xFF31, 0xFF, 0xD2);
+		rtsx_pci_write_register(pcr, 0xFF32, 0xFF, 0x0A);
+		rtsx_pci_write_register(pcr, 0xFF33, 0xFF, 0x40);
+	} else {
+		rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE, 0x80, 0x80);
+	}
+
 	if (efuse_valid == 2 || efuse_valid == 3) {
 		if (valid == 3) {
 			/* Bypass efuse */
@@ -618,6 +672,9 @@ static int rts5264_optimize_phy(struct rtsx_pcr *pcr)
 			rtsx_pci_update_phy(pcr, _PHY_REV0, 0x1FF, 0x3800);
 	}
 
+	if (is_version(pcr, PID_5264, RTS5264_IC_VER_B))
+		rtsx_pci_write_phy_register(pcr, 0x00, 0x5B79);
+
 	return 0;
 }
 
@@ -820,7 +877,7 @@ int rts5264_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 			SSC_DEPTH_MASK, ssc_depth);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
 
-	if (is_version(pcr, 0x5264, IC_VER_A)) {
+	if (is_version(pcr, PID_5264, RTS5264_IC_VER_A)) {
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS5264_CARD_CLK_SRC2,
 			RTS5264_REG_BIG_KVCO_A, 0);

drivers/misc/cardreader/rts5264.h

@@ -61,6 +61,8 @@
 /* DMACTL 0xFE2C */
 #define RTS5264_DMA_PACK_SIZE_MASK	0x70
 
+#define RTS5264_FW_CFG_INFO2	0xFF52
+
 #define RTS5264_FW_CFG1			0xFF55
 #define RTS5264_SYS_CLK_SEL_MCU_CLK	(0x01<<7)
 #define RTS5264_CRC_CLK_SEL_MCU_CLK	(0x01<<6)
@@ -272,6 +274,10 @@
 #define SD_LUN			1
 #define SD_EXPRESS_LUN		2
 
+#define RTS5264_IC_VER_A		0
+#define RTS5264_IC_VER_B		2
+#define RTS5264_IC_VER_C		3
+
 int rts5264_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 		u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk);
 

drivers/misc/cardreader/rtsx_pcr.c

@@ -1236,7 +1236,7 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
 	else if (PCI_PID(pcr) == PID_5228)
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF,
 			RTS5228_SSC_DEPTH_2M);
-	else if (is_version(pcr, 0x5264, IC_VER_A))
+	else if (is_version(pcr, PID_5264, RTS5264_IC_VER_A))
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
 	else if (PCI_PID(pcr) == PID_5264)
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF,