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/*
* Support of SDHCI for Microchip PIC32 SoC.
*
* Copyright (C) 2015 Microchip Technology Inc.
* Andrei Pistirica <andrei.pistirica@microchip.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <dm.h>
#include <common.h>
#include <sdhci.h>
#include <linux/errno.h>
#include <mach/pic32.h>
DECLARE_GLOBAL_DATA_PTR;
static int pic32_sdhci_get_cd(struct sdhci_host *host)
{
/* PIC32 SDHCI CD errata:
* - set CD_TEST and clear CD_TEST_INS bit
*/
sdhci_writeb(host, SDHCI_CTRL_CD_TEST, SDHCI_HOST_CONTROL);
return 0;
}
static const struct sdhci_ops pic32_sdhci_ops = {
.get_cd = pic32_sdhci_get_cd,
};
static int pic32_sdhci_probe(struct udevice *dev)
{
struct sdhci_host *host = dev_get_priv(dev);
const void *fdt = gd->fdt_blob;
u32 f_min_max[2];
fdt_addr_t addr;
fdt_size_t size;
int ret;
addr = fdtdec_get_addr_size(fdt, dev->of_offset, "reg", &size);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
host->ioaddr = ioremap(addr, size);
host->name = dev->name;
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
"bus-width", 4);
host->ops = &pic32_sdhci_ops;
ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
"clock-freq-min-max", f_min_max, 2);
if (ret) {
printf("sdhci: clock-freq-min-max not found\n");
return ret;
}
host->max_clk = f_min_max[1];
ret = add_sdhci(host, 0, f_min_max[0]);
if (ret)
return ret;
host->mmc->dev = dev;
return 0;
}
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,
.probe = pic32_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
};
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