diff mbox series

[3/3] mmc: dw_mmc: add exynos7870 DW MMC support

Message ID 20250204-exynos7870-mmc-v1-3-c87cfc72be4a@disroot.org (mailing list archive)
State New
Headers show
Series Introduce DW MMC support for Exynos7870 | expand

Commit Message

Kaustabh Chakraborty Feb. 3, 2025, 8:34 p.m. UTC 
From: Sergey Lisov <sleirsgoevy@gmail.com>

Add support for Exynos7870 DW MMC controllers, for both SMU and non-SMU
variants. These controllers require a quirk to access 64-bit FIFO in 32-bit
accesses (DW_MMC_QUIRK_FIFO64_32).

Signed-off-by: Sergey Lisov <sleirsgoevy@gmail.com>
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
---
 drivers/mmc/host/dw_mmc-exynos.c | 41 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 53d32d0f2709e0780ec5f31a3b412f33aaa6baa4..e3548408ca392c6b7afbfb05a439435073ab7657 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -27,6 +27,8 @@  enum dw_mci_exynos_type {
 	DW_MCI_TYPE_EXYNOS5420_SMU,
 	DW_MCI_TYPE_EXYNOS7,
 	DW_MCI_TYPE_EXYNOS7_SMU,
+	DW_MCI_TYPE_EXYNOS7870,
+	DW_MCI_TYPE_EXYNOS7870_SMU,
 	DW_MCI_TYPE_ARTPEC8,
 };
 
@@ -69,6 +71,12 @@  static struct dw_mci_exynos_compatible {
 	}, {
 		.compatible	= "samsung,exynos7-dw-mshc-smu",
 		.ctrl_type	= DW_MCI_TYPE_EXYNOS7_SMU,
+	}, {
+		.compatible	= "samsung,exynos7870-dw-mshc",
+		.ctrl_type	= DW_MCI_TYPE_EXYNOS7870,
+	}, {
+		.compatible	= "samsung,exynos7870-dw-mshc-smu",
+		.ctrl_type	= DW_MCI_TYPE_EXYNOS7870_SMU,
 	}, {
 		.compatible	= "axis,artpec8-dw-mshc",
 		.ctrl_type	= DW_MCI_TYPE_ARTPEC8,
@@ -85,6 +93,8 @@  static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host)
 		return EXYNOS4210_FIXED_CIU_CLK_DIV;
 	else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 			priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL64)) + 1;
 	else
@@ -100,7 +110,8 @@  static void dw_mci_exynos_config_smu(struct dw_mci *host)
 	 * set for non-ecryption mode at this time.
 	 */
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420_SMU ||
-		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) {
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU) {
 		mci_writel(host, MPSBEGIN0, 0);
 		mci_writel(host, MPSEND0, SDMMC_ENDING_SEC_NR_MAX);
 		mci_writel(host, MPSCTRL0, SDMMC_MPSCTRL_SECURE_WRITE_BIT |
@@ -126,6 +137,12 @@  static int dw_mci_exynos_priv_init(struct dw_mci *host)
 				DQS_CTRL_GET_RD_DELAY(priv->saved_strobe_ctrl);
 	}
 
+	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU) {
+		/* Quirk needed for certain Exynos SoCs */
+		host->quirks |= DW_MMC_QUIRK_FIFO64_32;
+	}
+
 	if (priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) {
 		/* Quirk needed for the ARTPEC-8 SoC */
 		host->quirks |= DW_MMC_QUIRK_EXTENDED_TMOUT;
@@ -143,6 +160,8 @@  static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		clksel = mci_readl(host, CLKSEL64);
 	else
@@ -152,6 +171,8 @@  static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		mci_writel(host, CLKSEL64, clksel);
 	else
@@ -222,6 +243,8 @@  static int dw_mci_exynos_resume_noirq(struct device *dev)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		clksel = mci_readl(host, CLKSEL64);
 	else
@@ -230,6 +253,8 @@  static int dw_mci_exynos_resume_noirq(struct device *dev)
 	if (clksel & SDMMC_CLKSEL_WAKEUP_INT) {
 		if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+			priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 			priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 			mci_writel(host, CLKSEL64, clksel);
 		else
@@ -409,6 +434,8 @@  static inline u8 dw_mci_exynos_get_clksmpl(struct dw_mci *host)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL64));
 	else
@@ -422,6 +449,8 @@  static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		clksel = mci_readl(host, CLKSEL64);
 	else
@@ -429,6 +458,8 @@  static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample)
 	clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample);
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		mci_writel(host, CLKSEL64, clksel);
 	else
@@ -443,6 +474,8 @@  static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		clksel = mci_readl(host, CLKSEL64);
 	else
@@ -453,6 +486,8 @@  static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host)
 
 	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 ||
+		priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU ||
 		priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
 		mci_writel(host, CLKSEL64, clksel);
 	else
@@ -632,6 +667,10 @@  static const struct of_device_id dw_mci_exynos_match[] = {
 			.data = &exynos_drv_data, },
 	{ .compatible = "samsung,exynos7-dw-mshc-smu",
 			.data = &exynos_drv_data, },
+	{ .compatible = "samsung,exynos7870-dw-mshc",
+			.data = &exynos_drv_data, },
+	{ .compatible = "samsung,exynos7870-dw-mshc-smu",
+			.data = &exynos_drv_data, },
 	{ .compatible = "axis,artpec8-dw-mshc",
 			.data = &artpec_drv_data, },
 	{},