[people/ms/u-boot.git] / drivers / mmc / pic32_sdhci.c

/*
 * 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 <common.h>
#include <dm.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(dev), "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(dev),
					"bus-width", 4);
	host->ops = &pic32_sdhci_ops;

	ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
				   "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),
};
Commit	Line	Data
102142c9 AP	1	/*
	2	* Support of SDHCI for Microchip PIC32 SoC.
	3	*
	4	* Copyright (C) 2015 Microchip Technology Inc.
	5	* Andrei Pistirica <andrei.pistirica@microchip.com>
	6	*
	7	* SPDX-License-Identifier: GPL-2.0+
	8	*/
	9
102142c9	10	#include <common.h>
4af0d7e8	11	#include <dm.h>
102142c9	12	#include <sdhci.h>
1221ce45	13	#include <linux/errno.h>
102142c9 AP	14	#include <mach/pic32.h>
	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
2cd44e1e	18	static int pic32_sdhci_get_cd(struct sdhci_host *host)
5e96217f JC	19	{
	20	/* PIC32 SDHCI CD errata:
	21	* - set CD_TEST and clear CD_TEST_INS bit
	22	*/
	23	sdhci_writeb(host, SDHCI_CTRL_CD_TEST, SDHCI_HOST_CONTROL);
	24
	25	return 0;
	26	}
	27
	28	static const struct sdhci_ops pic32_sdhci_ops = {
2cd44e1e	29	.get_cd = pic32_sdhci_get_cd,
5e96217f JC	30	};
5e96217f JC	31
102142c9 AP	32	static int pic32_sdhci_probe(struct udevice *dev)
	33	{
	34	struct sdhci_host *host = dev_get_priv(dev);
	35	const void *fdt = gd->fdt_blob;
	36	u32 f_min_max[2];
	37	fdt_addr_t addr;
	38	fdt_size_t size;
	39	int ret;
	40
e160f7d4	41	addr = fdtdec_get_addr_size(fdt, dev_of_offset(dev), "reg", &size);
102142c9 AP	42	if (addr == FDT_ADDR_T_NONE)
	43	return -EINVAL;
	44
	45	host->ioaddr = ioremap(addr, size);
cacd1d2f	46	host->name = dev->name;
6f88a3a5	47	host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
e160f7d4	48	host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
102142c9	49	"bus-width", 4);
5e96217f	50	host->ops = &pic32_sdhci_ops;
102142c9	51
e160f7d4	52	ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
102142c9 AP	53	"clock-freq-min-max", f_min_max, 2);
	54	if (ret) {
	55	printf("sdhci: clock-freq-min-max not found\n");
	56	return ret;
	57	}
	58
6d0e34bf SH	59	host->max_clk = f_min_max[1];
	60
	61	ret = add_sdhci(host, 0, f_min_max[0]);
cffe5d86 SG	62	if (ret)
	63	return ret;
	64	host->mmc->dev = dev;
	65
	66	return 0;
102142c9 AP	67	}
	68
	69	static const struct udevice_id pic32_sdhci_ids[] = {
	70	{ .compatible = "microchip,pic32mzda-sdhci" },
	71	{ }
	72	};
	73
	74	U_BOOT_DRIVER(pic32_sdhci_drv) = {
	75	.name = "pic32_sdhci",
	76	.id = UCLASS_MMC,
	77	.of_match = pic32_sdhci_ids,
	78	.probe = pic32_sdhci_probe,
	79	.priv_auto_alloc_size = sizeof(struct sdhci_host),
	80	};