zynq_sdhci.c
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/*
* (C) Copyright 2013 - 2015 Xilinx, Inc.
*
* Xilinx Zynq SD Host Controller Interface
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <clk.h>
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <sdhci.h>
DECLARE_GLOBAL_DATA_PTR;
struct arasan_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
unsigned int f_max;
};
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);
struct clk clk;
unsigned long clock;
int ret;
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0) {
dev_err(dev, "failed to get clock\n");
return ret;
}
clock = clk_get_rate(&clk);
if (IS_ERR_VALUE(clock)) {
dev_err(dev, "failed to get rate\n");
return clock;
}
debug("%s: CLK %ld\n", __func__, clock);
ret = clk_enable(&clk);
if (ret && ret != -ENOSYS) {
dev_err(dev, "failed to enable clock\n");
return 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->max_clk = clock;
ret = sdhci_setup_cfg(&plat->cfg, host, plat->f_max,
CONFIG_ZYNQ_SDHCI_MIN_FREQ);
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 arasan_sdhci_plat *plat = dev_get_platdata(dev);
struct sdhci_host *host = dev_get_priv(dev);
host->name = dev->name;
host->ioaddr = (void *)devfdt_get_addr(dev);
plat->f_max = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"max-frequency", CONFIG_ZYNQ_SDHCI_MAX_FREQ);
return 0;
}
static int arasan_sdhci_bind(struct udevice *dev)
{
struct arasan_sdhci_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-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),
};