u-boot/drivers/mmc/zynq_sdhci.c

/*
 * (C) Copyright 2013 - 2015 Xilinx, Inc.
 *
 * Xilinx Zynq SD Host Controller Interface
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <malloc.h>
#include <sdhci.h>

#ifndef CONFIG_ZYNQ_SDHCI_MIN_FREQ
# define CONFIG_ZYNQ_SDHCI_MIN_FREQ	0
#endif

struct arasan_sdhci_plat {
	struct mmc_config cfg;
	struct mmc mmc;
};

static int arasan_sdhci_probe(struct udevice *dev)
{
	struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
	struct sdhci_host *host = dev_get_priv(dev);
	u32 caps;
	int ret;

	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
		       SDHCI_QUIRK_BROKEN_R1B;

#ifdef CONFIG_ZYNQ_HISPD_BROKEN
	host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
#endif

	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);

	caps = sdhci_readl(host, SDHCI_CAPABILITIES);
	ret = sdhci_setup_cfg(&plat->cfg, dev->name,
			      caps, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
			      CONFIG_ZYNQ_SDHCI_MIN_FREQ, host->version,
			      host->quirks, 0);
	host->mmc = &plat->mmc;
	if (ret)
		return ret;
	host->mmc->priv = host;
	host->mmc->dev = dev;
	upriv->mmc = host->mmc;

	return sdhci_probe(dev);
}

static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
{
	struct sdhci_host *host = dev_get_priv(dev);

	host->name = dev->name;
	host->ioaddr = (void *)dev_get_addr(dev);

	return 0;
}

static int arasan_sdhci_bind(struct udevice *dev)
{
	struct arasan_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 arasan_sdhci_ids[] = {
	{ .compatible = "arasan,sdhci-8.9a" },
	{ }
};

U_BOOT_DRIVER(arasan_sdhci_drv) = {
	.name		= "arasan_sdhci",
	.id		= UCLASS_MMC,
	.of_match	= arasan_sdhci_ids,
	.ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
	.ops		= &sdhci_ops,
	.bind		= arasan_sdhci_bind,
	.probe		= arasan_sdhci_probe,
	.priv_auto_alloc_size = sizeof(struct sdhci_host),
	.platdata_auto_alloc_size = sizeof(struct arasan_sdhci_plat),
};