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// SPDX-License-Identifier: GPL-2.0+
/*
* Support of SDHCI for Microchip PIC32 SoC.
*
* Copyright (C) 2015 Microchip Technology Inc.
* Andrei Pistirica <andrei.pistirica@microchip.com>
*/
#include <dm.h>
#include <sdhci.h>
#include <clk.h>
#include <linux/errno.h>
#include <mach/pic32.h>
struct pic32_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
static int pic32_sdhci_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct pic32_sdhci_plat *plat = dev_get_plat(dev);
struct sdhci_host *host = dev_get_priv(dev);
struct clk clk;
ulong clk_rate;
int ret;
ret = clk_get_by_name(dev, "base_clk", &clk);
if (ret)
return ret;
clk_rate = clk_get_rate(&clk);
clk_free(&clk);
if (IS_ERR_VALUE(clk_rate))
return clk_rate;
host->ioaddr = dev_remap_addr(dev);
if (!host->ioaddr)
return -EINVAL;
host->name = dev->name;
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
host->max_clk = clk_rate;
host->mmc = &plat->mmc;
host->mmc->dev = dev;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
return ret;
host->mmc->priv = host;
upriv->mmc = host->mmc;
ret = sdhci_probe(dev);
if (ret)
return ret;
if (!dev_read_bool(dev, "microchip,use-sdcd")) {
// Use workaround 1 for erratum #15 by default
u8 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
ctrl = (ctrl & ~SDHCI_CTRL_CD_TEST_INS) | SDHCI_CTRL_CD_TEST;
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
}
return 0;
}
static int pic32_sdhci_bind(struct udevice *dev)
{
struct pic32_sdhci_plat *plat = dev_get_plat(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id pic32_sdhci_ids[] = {
{ .compatible = "microchip,pic32mzda-sdhci" },
{ }
};
U_BOOT_DRIVER(pic32_sdhci_drv) = {
.name = "pic32_sdhci",
.id = UCLASS_MMC,
.of_match = pic32_sdhci_ids,
.ops = &sdhci_ops,
.bind = pic32_sdhci_bind,
.probe = pic32_sdhci_probe,
.priv_auto = sizeof(struct sdhci_host),
.plat_auto = sizeof(struct pic32_sdhci_plat)
};
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