misc: rtsx: rts522a rts5228 rts5261 support Runtime PM

rts522a, rts5228, rts5261
add extra init flow for rtd3
add more power_down setting for avoid being woken up
by plugging or unplugging card when system in S3
Tested-by: NKai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: NRicky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/dace32f573a445908fec0a10482c394c@realtek.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/cardreader/rts5227.c

@@ -72,6 +72,8 @@ static void rts5227_fetch_vendor_settings(struct rtsx_pcr *pcr)
 
 	pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
+	if (CHK_PCI_PID(pcr, 0x522A))
+		pcr->rtd3_en = rtsx_reg_to_rtd3(reg);
 	if (rtsx_check_mmc_support(reg))
 		pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
 	pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);
@@ -171,6 +173,28 @@ static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
 	else
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x30, 0x00);
 
+	if (CHK_PCI_PID(pcr, 0x522A))
+		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS522A_AUTOLOAD_CFG1,
+			CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
+
+	if (pcr->rtd3_en) {
+		if (CHK_PCI_PID(pcr, 0x522A)) {
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS522A_PM_CTRL3, 0x01, 0x01);
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS522A_PME_FORCE_CTL, 0x30, 0x30);
+		} else {
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x01, 0x01);
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PME_FORCE_CTL, 0xFF, 0x33);
+		}
+	} else {
+		if (CHK_PCI_PID(pcr, 0x522A)) {
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS522A_PM_CTRL3, 0x01, 0x00);
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RTS522A_PME_FORCE_CTL, 0x30, 0x20);
+		} else {
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PME_FORCE_CTL, 0xFF, 0x30);
+			rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x01, 0x00);
+		}
+	}
+
 	if (option->force_clkreq_0)
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG,
 				FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
@@ -438,6 +462,28 @@ static int rts522a_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 	return rtsx_pci_send_cmd(pcr, 100);
 }
 
+static void rts522a_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool runtime)
+{
+	/* Set relink_time to 0 */
+	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, 0);
+	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, 0);
+	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
+				RELINK_TIME_MASK, 0);
+
+	rtsx_pci_write_register(pcr, RTS522A_PM_CTRL3,
+			D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
+
+	if (!runtime) {
+		rtsx_pci_write_register(pcr, RTS522A_AUTOLOAD_CFG1,
+				CD_RESUME_EN_MASK, 0);
+		rtsx_pci_write_register(pcr, RTS522A_PM_CTRL3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS522A_PME_FORCE_CTL, 0x30, 0x20);
+	}
+
+	rtsx_pci_write_register(pcr, FPDCTL, ALL_POWER_DOWN, ALL_POWER_DOWN);
+}
+
+
 static void rts522a_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
 {
 	struct rtsx_cr_option *option = &pcr->option;
@@ -473,6 +519,7 @@ static const struct pcr_ops rts522a_pcr_ops = {
 	.card_power_on = rts5227_card_power_on,
 	.card_power_off = rts5227_card_power_off,
 	.switch_output_voltage = rts522a_switch_output_voltage,
+	.force_power_down = rts522a_force_power_down,
 	.cd_deglitch = NULL,
 	.conv_clk_and_div_n = NULL,
 	.set_l1off_cfg_sub_d0 = rts522a_set_l1off_cfg_sub_d0,

drivers/misc/cardreader/rts5228.c

@@ -102,6 +102,14 @@ static void rts5228_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool run
 	rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
 			D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
 
+	if (!runtime) {
+		rtsx_pci_write_register(pcr, RTS5228_AUTOLOAD_CFG1,
+				CD_RESUME_EN_MASK, 0);
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+	}
+
 	rtsx_pci_write_register(pcr, FPDCTL,
 		SSC_POWER_DOWN, SSC_POWER_DOWN);
 }
@@ -480,9 +488,18 @@ static int rts5228_extra_init_hw(struct rtsx_pcr *pcr)
 				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
 
 	rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, 0xFF, 0xFB);
-	rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x10, 0x00);
+
+	if (pcr->rtd3_en) {
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x01);
 	rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
-			FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+				FORCE_PM_CONTROL | FORCE_PM_VALUE,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE);
+	} else {
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+	}
+	rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, 0x00);
 
 	return 0;
 }

drivers/misc/cardreader/rts5261.c

@@ -103,6 +103,24 @@ static void rts5261_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool run
 		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
 					D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
 
+	if (!runtime) {
+		rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
+				CD_RESUME_EN_MASK, 0);
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+
+	} else {
+		rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE, 0);
+
+		rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
+				RTS5261_INFORM_RTD3_COLD, RTS5261_INFORM_RTD3_COLD);
+		rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
+				RTS5261_FORCE_PRSNT_LOW, RTS5261_FORCE_PRSNT_LOW);
+
+	}
+
 	rtsx_pci_write_register(pcr, RTS5261_REG_FPDCTL,
 		SSC_POWER_DOWN, SSC_POWER_DOWN);
 }
@@ -536,9 +554,18 @@ static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
 				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
 
 	rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, 0xFF, 0xFB);
-	rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x10, 0x00);
-	rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
-			FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+
+	if (pcr->rtd3_en) {
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x01);
+		rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE);
+	} else {
+		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
+		rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
+				FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
+	}
+	rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, 0x00);
 
 	/* Clear Enter RTD3_cold Information*/
 	rtsx_pci_write_register(pcr, RTS5261_FW_CTL,

drivers/misc/cardreader/rtsx_pcr.h

@@ -15,6 +15,8 @@
 #define MIN_DIV_N_PCR		80
 #define MAX_DIV_N_PCR		208
 
+#define RTS522A_PME_FORCE_CTL	0xFF78
+#define RTS522A_AUTOLOAD_CFG1	0xFF7C
 #define RTS522A_PM_CTRL3		0xFF7E
 
 #define RTS524A_PME_FORCE_CTL		0xFF78