Commit a0d0d86f authored by Wenyou Yang's avatar Wenyou Yang Committed by Andreas Bießmann

mmc: atmel_sdhci: Convert to the driver model support

Convert the driver to the driver model while retaining the existing
legacy code. This allows the driver to support boards that have
converted to driver model as well as those that have not.
Signed-off-by: default avatarWenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
Reviewed-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: default avatarHeiko Schocher <hs@denx.de>
parent 17b68b5a
......@@ -34,6 +34,16 @@ config MSM_SDHCI
SD 3.0 specifications. Both SD and eMMC devices are supported.
Card-detect gpios are not supported.
config ATMEL_SDHCI
bool "Atmel SDHCI controller support"
depends on DM_MMC && BLK && DM_MMC_OPS && ARCH_AT91
help
This enables support for the Atmel SDHCI controller, which supports
the embedded MultiMedia Card (e.MMC) Specification V4.51, the SD
Memory Card Specification V3.0, and the SDIO V3.0 specification.
It is compliant with the SD Host Controller Standard V3.0
specification.
config ROCKCHIP_DWMMC
bool "Rockchip SD/MMC controller support"
depends on DM_MMC && OF_CONTROL
......
......@@ -6,12 +6,15 @@
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <malloc.h>
#include <sdhci.h>
#include <asm/arch/clk.h>
#define ATMEL_SDHC_MIN_FREQ 400000
#ifndef CONFIG_DM_MMC
int atmel_sdhci_init(void *regbase, u32 id)
{
struct sdhci_host *host;
......@@ -38,3 +41,123 @@ int atmel_sdhci_init(void *regbase, u32 id)
return 0;
}
#else
DECLARE_GLOBAL_DATA_PTR;
struct atmel_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
static int atmel_sdhci_get_clk(struct udevice *dev, int index, struct clk *clk)
{
struct udevice *dev_clk;
int periph, ret;
ret = clk_get_by_index(dev, index, clk);
if (ret)
return ret;
periph = fdtdec_get_uint(gd->fdt_blob, clk->dev->of_offset, "reg", -1);
if (periph < 0)
return -EINVAL;
dev_clk = dev_get_parent(clk->dev);
ret = clk_request(dev_clk, clk);
if (ret)
return ret;
clk->id = periph;
return 0;
}
static int atmel_sdhci_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
struct sdhci_host *host = dev_get_priv(dev);
u32 max_clk;
u32 caps, caps_1;
u32 clk_base, clk_mul;
ulong gck_rate;
struct clk clk;
int ret;
ret = atmel_sdhci_get_clk(dev, 0, &clk);
if (ret)
return ret;
ret = clk_enable(&clk);
if (ret)
return ret;
host->name = dev->name;
host->ioaddr = (void *)dev_get_addr(dev);
host->quirks = 0;
host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
"bus-width", 4);
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
clk_base = (caps & SDHCI_CLOCK_V3_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >> SDHCI_CLOCK_MUL_SHIFT;
gck_rate = clk_base * 1000000 * (clk_mul + 1);
ret = atmel_sdhci_get_clk(dev, 1, &clk);
if (ret)
return ret;
ret = clk_set_rate(&clk, gck_rate);
if (ret)
return ret;
max_clk = clk_get_rate(&clk);
if (!max_clk)
return -EINVAL;
ret = sdhci_setup_cfg(&plat->cfg, host, max_clk, ATMEL_SDHC_MIN_FREQ);
if (ret)
return ret;
host->mmc = &plat->mmc;
host->mmc->dev = dev;
host->mmc->priv = host;
upriv->mmc = host->mmc;
clk_free(&clk);
return sdhci_probe(dev);
}
static int atmel_sdhci_bind(struct udevice *dev)
{
struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
int ret;
ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
if (ret)
return ret;
return 0;
}
static const struct udevice_id atmel_sdhci_ids[] = {
{ .compatible = "atmel,sama5d2-sdhci" },
{ }
};
U_BOOT_DRIVER(atmel_sdhci_drv) = {
.name = "atmel_sdhci",
.id = UCLASS_MMC,
.of_match = atmel_sdhci_ids,
.ops = &sdhci_ops,
.bind = atmel_sdhci_bind,
.probe = atmel_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
.platdata_auto_alloc_size = sizeof(struct atmel_sdhci_plat),
};
#endif
......@@ -166,6 +166,8 @@
#define SDHCI_CAN_64BIT 0x10000000
#define SDHCI_CAPABILITIES_1 0x44
#define SDHCI_CLOCK_MUL_MASK 0x00FF0000
#define SDHCI_CLOCK_MUL_SHIFT 16
#define SDHCI_MAX_CURRENT 0x48
......
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