rockchip_sdhci.c
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/*
* (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
*
* Rockchip SD Host Controller Interface
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <dt-structs.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <mapmem.h>
#include <sdhci.h>
#include <clk.h>
DECLARE_GLOBAL_DATA_PTR;
/* 400KHz is max freq for card ID etc. Use that as min */
#define EMMC_MIN_FREQ 400000
struct rockchip_sdhc_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_rockchip_rk3399_sdhci_5_1 dtplat;
#endif
struct mmc_config cfg;
struct mmc mmc;
};
struct rockchip_sdhc {
struct sdhci_host host;
void *base;
};
static int arasan_sdhci_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
struct rockchip_sdhc *prv = dev_get_priv(dev);
struct sdhci_host *host = &prv->host;
int max_frequency, ret;
struct clk clk;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat;
host->name = dev->name;
host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
max_frequency = dtplat->max_frequency;
ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
#else
max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
ret = clk_get_by_index(dev, 0, &clk);
#endif
if (!ret) {
ret = clk_set_rate(&clk, max_frequency);
if (IS_ERR_VALUE(ret))
printf("%s clk set rate fail!\n", __func__);
} else {
printf("%s fail to get clk\n", __func__);
}
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
host->max_clk = max_frequency;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
host->mmc = &plat->mmc;
if (ret)
return ret;
host->mmc->priv = &prv->host;
host->mmc->dev = dev;
upriv->mmc = host->mmc;
return sdhci_probe(dev);
}
static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct sdhci_host *host = dev_get_priv(dev);
host->name = dev->name;
host->ioaddr = dev_read_addr_ptr(dev);
#endif
return 0;
}
static int rockchip_sdhci_bind(struct udevice *dev)
{
struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id arasan_sdhci_ids[] = {
{ .compatible = "arasan,sdhci-5.1" },
{ }
};
U_BOOT_DRIVER(arasan_sdhci_drv) = {
.name = "rockchip_rk3399_sdhci_5_1",
.id = UCLASS_MMC,
.of_match = arasan_sdhci_ids,
.ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
.ops = &sdhci_ops,
.bind = rockchip_sdhci_bind,
.probe = arasan_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
.platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
};