[people/ms/u-boot.git] / cmd / mmc_spi.c

/*
 * Command for mmc_spi setup.
 *
 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
 * Licensed under the GPL-2 or later.
 */

#include <common.h>
#include <mmc.h>
#include <spi.h>

#ifndef CONFIG_MMC_SPI_BUS
# define CONFIG_MMC_SPI_BUS 0
#endif
#ifndef CONFIG_MMC_SPI_CS
# define CONFIG_MMC_SPI_CS 1
#endif
/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
#ifndef CONFIG_MMC_SPI_SPEED
# define CONFIG_MMC_SPI_SPEED 25000000
#endif
/* MMC and SD specs only seem to care that sampling is on the
 * rising edge ... meaning SPI modes 0 or 3.  So either SPI mode
 * should be legit.  We'll use mode 0 since the steady state is 0,
 * which is appropriate for hotplugging, unless the platform data
 * specify mode 3 (if hardware is not compatible to mode 0).
 */
#ifndef CONFIG_MMC_SPI_MODE
# define CONFIG_MMC_SPI_MODE SPI_MODE_0
#endif

static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint bus = CONFIG_MMC_SPI_BUS;
	uint cs = CONFIG_MMC_SPI_CS;
	uint speed = CONFIG_MMC_SPI_SPEED;
	uint mode = CONFIG_MMC_SPI_MODE;
	char *endp;
	struct mmc *mmc;

	if (argc < 2)
		goto usage;

	cs = simple_strtoul(argv[1], &endp, 0);
	if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
		goto usage;
	if (*endp == ':') {
		if (endp[1] == 0)
			goto usage;
		bus = cs;
		cs = simple_strtoul(endp + 1, &endp, 0);
		if (*endp != 0)
			goto usage;
	}
	if (argc >= 3) {
		speed = simple_strtoul(argv[2], &endp, 0);
		if (*argv[2] == 0 || *endp != 0)
			goto usage;
	}
	if (argc >= 4) {
		mode = simple_strtoul(argv[3], &endp, 16);
		if (*argv[3] == 0 || *endp != 0)
			goto usage;
	}
	if (!spi_cs_is_valid(bus, cs)) {
		printf("Invalid SPI bus %u cs %u\n", bus, cs);
		return 1;
	}

	mmc = mmc_spi_init(bus, cs, speed, mode);
	if (!mmc) {
		printf("Failed to create MMC Device\n");
		return 1;
	}
	printf("%s: %d at %u:%u hz %u mode %u\n", mmc->cfg->name,
	       mmc->block_dev.devnum, bus, cs, speed, mode);
	mmc_init(mmc);
	return 0;

usage:
	return CMD_RET_USAGE;
}

U_BOOT_CMD(
	mmc_spi,	4,	0,	do_mmc_spi,
	"mmc_spi setup",
	"[bus:]cs [hz] [mode]	- setup mmc_spi device"
);
Commit	Line	Data
d52ebf10 TC	1	/*
	2	* Command for mmc_spi setup.
	3	*
	4	* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
	5	* Licensed under the GPL-2 or later.
	6	*/
	7
	8	#include <common.h>
	9	#include <mmc.h>
	10	#include <spi.h>
	11
	12	#ifndef CONFIG_MMC_SPI_BUS
	13	# define CONFIG_MMC_SPI_BUS 0
	14	#endif
	15	#ifndef CONFIG_MMC_SPI_CS
	16	# define CONFIG_MMC_SPI_CS 1
	17	#endif
	18	/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
	19	#ifndef CONFIG_MMC_SPI_SPEED
	20	# define CONFIG_MMC_SPI_SPEED 25000000
	21	#endif
	22	/* MMC and SD specs only seem to care that sampling is on the
	23	* rising edge ... meaning SPI modes 0 or 3. So either SPI mode
	24	* should be legit. We'll use mode 0 since the steady state is 0,
	25	* which is appropriate for hotplugging, unless the platform data
	26	* specify mode 3 (if hardware is not compatible to mode 0).
	27	*/
	28	#ifndef CONFIG_MMC_SPI_MODE
	29	# define CONFIG_MMC_SPI_MODE SPI_MODE_0
	30	#endif
	31
	32	static int do_mmc_spi(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	33	{
	34	uint bus = CONFIG_MMC_SPI_BUS;
	35	uint cs = CONFIG_MMC_SPI_CS;
	36	uint speed = CONFIG_MMC_SPI_SPEED;
	37	uint mode = CONFIG_MMC_SPI_MODE;
	38	char *endp;
	39	struct mmc *mmc;
	40
	41	if (argc < 2)
	42	goto usage;
	43
	44	cs = simple_strtoul(argv[1], &endp, 0);
	45	if (argv[1] == 0 \|\| (endp != 0 && *endp != ':'))
	46	goto usage;
	47	if (*endp == ':') {
	48	if (endp[1] == 0)
	49	goto usage;
	50	bus = cs;
	51	cs = simple_strtoul(endp + 1, &endp, 0);
	52	if (*endp != 0)
	53	goto usage;
	54	}
	55	if (argc >= 3) {
	56	speed = simple_strtoul(argv[2], &endp, 0);
	57	if (argv[2] == 0 \|\| endp != 0)
	58	goto usage;
	59	}
	60	if (argc >= 4) {
	61	mode = simple_strtoul(argv[3], &endp, 16);
	62	if (argv[3] == 0 \|\| endp != 0)
	63	goto usage;
	64	}
65	if (!spi_cs_is_valid(bus, cs)) {
66	printf("Invalid SPI bus %u cs %u\n", bus, cs);
67	return 1;
68	}
69
70	mmc = mmc_spi_init(bus, cs, speed, mode);
71	if (!mmc) {
72	printf("Failed to create MMC Device\n");
73	return 1;
74	}
bcce53d0 SG	75	printf("%s: %d at %u:%u hz %u mode %u\n", mmc->cfg->name,
bcce53d0 SG	76	mmc->block_dev.devnum, bus, cs, speed, mode);
28df15e0	77	mmc_init(mmc);
d52ebf10 TC	78	return 0;
	79
	80	usage:
4c12eeb8	81	return CMD_RET_USAGE;
d52ebf10 TC	82	}
	83
	84	U_BOOT_CMD(
	85	mmc_spi, 4, 0, do_mmc_spi,
	86	"mmc_spi setup",
	87	"[bus:]cs [hz] [mode] - setup mmc_spi device"
	88	);