Add support for the mmc controller in the Sophgo CV1800B and SG2002
with corresponding new compatible strings. Implement custom sdhci_ops.
Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
---
drivers/mmc/host/sdhci-of-dwcmshc.c | 66 +++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index a1f57af6acfb..ab4b964d4058 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -52,6 +52,20 @@
#define AT_CTRL_SWIN_TH_VAL_MASK GENMASK(31, 24) /* bits [31:24] */
#define AT_CTRL_SWIN_TH_VAL 0x9 /* sampling window threshold */
+/* Sophgo CV18XX specific Registers */
+#define CV18XX_SDHCI_MSHC_CTRL 0x00
+#define CV18XX_EMMC_FUNC_EN BIT(0)
+#define CV18XX_LATANCY_1T BIT(1)
+#define CV18XX_SDHCI_PHY_TX_RX_DLY 0x40
+#define CV18XX_PHY_TX_DLY_MSK GENMASK(6, 0)
+#define CV18XX_PHY_TX_SRC_MSK GENMASK(9, 8)
+#define CV18XX_PHY_TX_SRC_INVERT_CLK_TX 0x1
+#define CV18XX_PHY_RX_DLY_MSK GENMASK(22, 16)
+#define CV18XX_PHY_RX_SRC_MSK GENMASK(25, 24)
+#define CV18XX_PHY_RX_SRC_INVERT_RX_CLK 0x1
+#define CV18XX_SDHCI_PHY_CONFIG 0x4c
+#define CV18XX_PHY_TX_BPS BIT(0)
+
/* Rockchip specific Registers */
#define DWCMSHC_EMMC_DLL_CTRL 0x800
#define DWCMSHC_EMMC_DLL_RXCLK 0x804
@@ -642,6 +656,35 @@ static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
}
}
+static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u32 val, emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
+
+ sdhci_reset(host, mask);
+
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ val |= CV18XX_EMMC_FUNC_EN;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ }
+
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ val |= CV18XX_LATANCY_1T;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
+ val |= CV18XX_PHY_TX_BPS;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
+
+ val = (FIELD_PREP(CV18XX_PHY_TX_DLY_MSK, 0) |
+ FIELD_PREP(CV18XX_PHY_TX_SRC_MSK, CV18XX_PHY_TX_SRC_INVERT_CLK_TX) |
+ FIELD_PREP(CV18XX_PHY_RX_DLY_MSK, 0) |
+ FIELD_PREP(CV18XX_PHY_RX_SRC_MSK, CV18XX_PHY_RX_SRC_INVERT_RX_CLK));
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_TX_RX_DLY);
+}
+
static const struct sdhci_ops sdhci_dwcmshc_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
@@ -671,6 +714,15 @@ static const struct sdhci_ops sdhci_dwcmshc_th1520_ops = {
.platform_execute_tuning = &th1520_execute_tuning,
};
+static const struct sdhci_ops sdhci_dwcmshc_cv18xx_ops = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_uhs_signaling = dwcmshc_set_uhs_signaling,
+ .get_max_clock = dwcmshc_get_max_clock,
+ .reset = cv18xx_sdhci_reset,
+ .adma_write_desc = dwcmshc_adma_write_desc,
+};
+
static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = {
.ops = &sdhci_dwcmshc_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
@@ -700,6 +752,12 @@ static const struct sdhci_pltfm_data sdhci_dwcmshc_th1520_pdata = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
};
+static const struct sdhci_pltfm_data sdhci_dwcmshc_cv18xx_pdata = {
+ .ops = &sdhci_dwcmshc_cv18xx_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
{
int err;
@@ -768,6 +826,14 @@ static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
.compatible = "snps,dwcmshc-sdhci",
.data = &sdhci_dwcmshc_pdata,
},
+ {
+ .compatible = "sophgo,cv1800b-dwcmshc",
+ .data = &sdhci_dwcmshc_cv18xx_pdata,
+ },
+ {
+ .compatible = "sophgo,sg2002-dwcmshc",
+ .data = &sdhci_dwcmshc_cv18xx_pdata,
+ },
{
.compatible = "thead,th1520-dwcmshc",
.data = &sdhci_dwcmshc_th1520_pdata,
--
2.43.0
