[PATCH 2/4] mmc: dw_mmc-exynos: Add support for ARTPEC-8
Mårten Lindahl
marten.lindahl at axis.com
Wed Dec 1 07:38:02 PST 2021
The ARTPEC-8 SoC has a DWMMC controller that is compatible with the
Exynos 7 version v2.70a. The main differences from Exynos 7 is that it
does not support HS400 and has extended data read timeout.
This patch adds compatibility string "samsung,artpec8-dw-mshc" for
ARTPEC-8, and DW_MCI_TYPE_ARTPEC8 is added to the dw_mci_exynos_type.
Signed-off-by: Mårten Lindahl <marten.lindahl at axis.com>
---
drivers/mmc/host/dw_mmc-exynos.c | 47 ++++++++++++++++++++++++--------
1 file changed, 36 insertions(+), 11 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index f76eeeb0cc53..cae7c94b5d6e 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -28,6 +28,7 @@ enum dw_mci_exynos_type {
DW_MCI_TYPE_EXYNOS5420_SMU,
DW_MCI_TYPE_EXYNOS7,
DW_MCI_TYPE_EXYNOS7_SMU,
+ DW_MCI_TYPE_ARTPEC8,
};
/* Exynos implementation specific driver private data */
@@ -69,6 +70,9 @@ static struct dw_mci_exynos_compatible {
}, {
.compatible = "samsung,exynos7-dw-mshc-smu",
.ctrl_type = DW_MCI_TYPE_EXYNOS7_SMU,
+ }, {
+ .compatible = "samsung,artpec8-dw-mshc",
+ .ctrl_type = DW_MCI_TYPE_ARTPEC8,
},
};
@@ -81,7 +85,8 @@ static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host)
else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210)
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_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL64)) + 1;
else
return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1;
@@ -133,7 +138,8 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
u32 clksel;
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
- priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
+ priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
clksel = mci_readl(host, CLKSEL64);
else
clksel = mci_readl(host, CLKSEL);
@@ -141,7 +147,8 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
clksel = (clksel & ~SDMMC_CLKSEL_TIMING_MASK) | timing;
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
- priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
+ priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
mci_writel(host, CLKSEL64, clksel);
else
mci_writel(host, CLKSEL, clksel);
@@ -210,14 +217,16 @@ static int dw_mci_exynos_resume_noirq(struct device *dev)
return ret;
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
- priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
+ priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
clksel = mci_readl(host, CLKSEL64);
else
clksel = mci_readl(host, CLKSEL);
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_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
mci_writel(host, CLKSEL64, clksel);
else
mci_writel(host, CLKSEL, clksel);
@@ -238,7 +247,8 @@ static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing)
* Not supported to configure register
* related to HS400
*/
- if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) {
+ if ((priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) ||
+ (priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)) {
if (timing == MMC_TIMING_MMC_HS400)
dev_warn(host->dev,
"cannot configure HS400, unsupported chipset\n");
@@ -394,7 +404,8 @@ static inline u8 dw_mci_exynos_get_clksmpl(struct dw_mci *host)
struct dw_mci_exynos_priv_data *priv = host->priv;
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
- priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
+ priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL64));
else
return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL));
@@ -406,13 +417,15 @@ static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample)
struct dw_mci_exynos_priv_data *priv = host->priv;
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
- priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
+ priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
clksel = mci_readl(host, CLKSEL64);
else
clksel = mci_readl(host, CLKSEL);
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_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
mci_writel(host, CLKSEL64, clksel);
else
mci_writel(host, CLKSEL, clksel);
@@ -425,7 +438,8 @@ static inline u8 dw_mci_exynos_move_next_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_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
clksel = mci_readl(host, CLKSEL64);
else
clksel = mci_readl(host, CLKSEL);
@@ -434,7 +448,8 @@ static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host)
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_EXYNOS7_SMU ||
+ priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)
mci_writel(host, CLKSEL64, clksel);
else
mci_writel(host, CLKSEL, clksel);
@@ -543,6 +558,14 @@ static const struct dw_mci_drv_data exynos_drv_data = {
.prepare_hs400_tuning = dw_mci_exynos_prepare_hs400_tuning,
};
+static const struct dw_mci_drv_data artpec_drv_data = {
+ .common_caps = MMC_CAP_CMD23,
+ .init = dw_mci_exynos_priv_init,
+ .set_ios = dw_mci_exynos_set_ios,
+ .parse_dt = dw_mci_exynos_parse_dt,
+ .execute_tuning = dw_mci_exynos_execute_tuning,
+};
+
static const struct of_device_id dw_mci_exynos_match[] = {
{ .compatible = "samsung,exynos4412-dw-mshc",
.data = &exynos_drv_data, },
@@ -556,6 +579,8 @@ 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,artpec8-dw-mshc",
+ .data = &artpec_drv_data, },
{},
};
MODULE_DEVICE_TABLE(of, dw_mci_exynos_match);
--
2.20.1
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