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mmc: exynos_dw_mmc: support the Driver mode for Exynos

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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>
This commit is contained in:
Jaehoon Chung 2016-06-30 20:57:37 +09:00 committed by Minkyu Kang
parent 70f6d39433
commit 3537ee879e
1 changed files with 72 additions and 0 deletions
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72
drivers/mmc/exynos_dw_mmc.c
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@ -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