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/*
* Copyright (c) 2017
* Patrice Chotard <patrice.chotard@st.com>
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <dm.h>
#include <mmc.h>
#include <sdhci.h>
#include <asm/arch/sdhci.h>
DECLARE_GLOBAL_DATA_PTR;
struct sti_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
/*
* used to get access to MMC1 reset,
* will be removed when STi reset driver will be available
*/
#define STIH410_SYSCONF5_BASE 0x092b0000
/**
* sti_mmc_core_config: configure the Arasan HC
* @regbase: base address
* @mmc_instance: mmc instance id
* Description: this function is to configure the Arasan MMC HC.
* This should be called when the system starts in case of, on the SoC,
* it is needed to configure the host controller.
* This happens on some SoCs, i.e. StiH410, where the MMC0 inside the flashSS
* needs to be configured as MMC 4.5 to have full capabilities.
* W/o these settings the SDHCI could configure and use the embedded controller
* with limited features.
*/
static void sti_mmc_core_config(const u32 regbase, int mmc_instance)
{
unsigned long *sysconf;
/* only MMC1 has a reset line */
if (mmc_instance) {
sysconf = (unsigned long *)(STIH410_SYSCONF5_BASE +
ST_MMC_CCONFIG_REG_5);
generic_set_bit(SYSCONF_MMC1_ENABLE_BIT, sysconf);
}
writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
regbase + FLASHSS_MMC_CORE_CONFIG_1);
if (mmc_instance) {
writel(STI_FLASHSS_MMC_CORE_CONFIG2,
regbase + FLASHSS_MMC_CORE_CONFIG_2);
writel(STI_FLASHSS_MMC_CORE_CONFIG3,
regbase + FLASHSS_MMC_CORE_CONFIG_3);
} else {
writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
regbase + FLASHSS_MMC_CORE_CONFIG_2);
writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
regbase + FLASHSS_MMC_CORE_CONFIG_3);
}
writel(STI_FLASHSS_MMC_CORE_CONFIG4,
regbase + FLASHSS_MMC_CORE_CONFIG_4);
}
static int sti_sdhci_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct sti_sdhci_plat *plat = dev_get_platdata(dev);
struct sdhci_host *host = dev_get_priv(dev);
int ret, mmc_instance;
/*
* identify current mmc instance, mmc1 has a reset, not mmc0
* MMC0 is wired to the SD slot,
* MMC1 is wired on the high speed connector
*/
if (fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "resets", NULL))
mmc_instance = 1;
else
mmc_instance = 0;
sti_mmc_core_config((const u32) host->ioaddr, mmc_instance);
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_NO_HISPD_BIT;
host->host_caps = MMC_MODE_DDR_52MHz;
ret = sdhci_setup_cfg(&plat->cfg, host, 50000000, 400000);
if (ret)
return ret;
host->mmc = &plat->mmc;
host->mmc->priv = host;
host->mmc->dev = dev;
upriv->mmc = host->mmc;
return sdhci_probe(dev);
}
static int sti_sdhci_ofdata_to_platdata(struct udevice *dev)
{
struct sdhci_host *host = dev_get_priv(dev);
host->name = strdup(dev->name);
host->ioaddr = (void *)dev_get_addr(dev);
host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"bus-width", 4);
return 0;
}
static int sti_sdhci_bind(struct udevice *dev)
{
struct sti_sdhci_plat *plat = dev_get_platdata(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id sti_sdhci_ids[] = {
{ .compatible = "st,sdhci" },
{ }
};
U_BOOT_DRIVER(sti_mmc) = {
.name = "sti_sdhci",
.id = UCLASS_MMC,
.of_match = sti_sdhci_ids,
.bind = sti_sdhci_bind,
.ops = &sdhci_ops,
.ofdata_to_platdata = sti_sdhci_ofdata_to_platdata,
.probe = sti_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
.platdata_auto_alloc_size = sizeof(struct sti_sdhci_plat),
};
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