mmc: exynos_dw_mmc: support the Driver mode for Exynos

This patch support the driver mode for exynos dwmmc controller.
To support the legacy model, maintained the existing code.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
index ab0df46d821628e841fb125f7f6525970e186291..283befccfbe6ceca869b4cc51c1df0628570aaa1 100644 (file)
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -23,8 +23,21 @@
 #define        DWMMC_MMC0_SDR_TIMING_VAL       0x03030001
 #define        DWMMC_MMC2_SDR_TIMING_VAL       0x03020001
 
+#ifdef CONFIG_DM_MMC
+#include <dm.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+struct exynos_mmc_plat {
+       struct mmc_config cfg;
+       struct mmc mmc;
+};
+#endif
+
 /* Exynos implmentation specific drver private data */
 struct dwmci_exynos_priv_data {
+#ifdef CONFIG_DM_MMC
+       struct dwmci_host host;
+#endif
        u32 sdr_timing;
 };
 
@@ -105,11 +118,15 @@ static int exynos_dwmci_core_init(struct dwmci_host *host)
        host->caps = MMC_MODE_DDR_52MHz;
        host->clksel = exynos_dwmci_clksel;
        host->get_mmc_clk = exynos_dwmci_get_clk;
+
+#ifndef CONFIG_DM_MMC
        /* Add the mmc channel to be registered with mmc core */
        if (add_dwmci(host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ)) {
                printf("DWMMC%d registration failed\n", host->dev_index);
                return -1;
        }
+#endif
+
        return 0;
 }
 
@@ -237,3 +254,58 @@ int exynos_dwmmc_init(const void *blob)
 
        return err;
 }
+
+#ifdef CONFIG_DM_MMC
+static int exynos_dwmmc_probe(struct udevice *dev)
+{
+       struct exynos_mmc_plat *plat = dev_get_platdata(dev);
+       struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+       struct dwmci_exynos_priv_data *priv = dev_get_priv(dev);
+       struct dwmci_host *host = &priv->host;
+       int err;
+
+       err = exynos_dwmci_get_config(gd->fdt_blob, dev->of_offset, host);
+       if (err)
+               return err;
+       err = do_dwmci_init(host);
+       if (err)
+               return err;
+
+       dwmci_setup_cfg(&plat->cfg, host->name, host->buswidth, host->caps,
+                       DWMMC_MAX_FREQ, DWMMC_MIN_FREQ);
+       host->mmc = &plat->mmc;
+       host->mmc->priv = &priv->host;
+       host->priv = dev;
+       upriv->mmc = host->mmc;
+
+       return dwmci_probe(dev);
+}
+
+static int exynos_dwmmc_bind(struct udevice *dev)
+{
+       struct exynos_mmc_plat *plat = dev_get_platdata(dev);
+       int ret;
+
+       ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
+static const struct udevice_id exynos_dwmmc_ids[] = {
+       { .compatible = "samsung,exynos4412-dw-mshc" },
+       { }
+};
+
+U_BOOT_DRIVER(exynos_dwmmc_drv) = {
+       .name           = "exynos_dwmmc",
+       .id             = UCLASS_MMC,
+       .of_match       = exynos_dwmmc_ids,
+       .bind           = exynos_dwmmc_bind,
+       .ops            = &dm_dwmci_ops,
+       .probe          = exynos_dwmmc_probe,
+       .priv_auto_alloc_size   = sizeof(struct dwmci_exynos_priv_data),
+       .platdata_auto_alloc_size = sizeof(struct exynos_mmc_plat),
+};
+#endif