From 91e2ca227b4112640b2acb7a8698651ce814e93a Mon Sep 17 00:00:00 2001 From: Mårten Lindahl Date: Mon, 20 Dec 2021 12:30:24 +0100 Subject: mmc: dw_mmc-exynos: Add support for ARTPEC-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 "axis,artpec8-dw-mshc" for ARTPEC-8, and DW_MCI_TYPE_ARTPEC8 is added to the dw_mci_exynos_type. Signed-off-by: Mårten Lindahl Acked-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20211220113026.21129-3-marten.lindahl@axis.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/dw_mmc-exynos.c | 47 ++++++++++++++++++++++++++++++---------- 1 file changed, 36 insertions(+), 11 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c index f76eeeb0cc53..86486e6659de 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 = "axis,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 = "axis,artpec8-dw-mshc", + .data = &artpec_drv_data, }, {}, }; MODULE_DEVICE_TABLE(of, dw_mci_exynos_match); -- cgit