[people/ms/u-boot.git] / common / cmd_sf.c

/*
 * Command for accessing SPI flash.
 *
 * Copyright (C) 2008 Atmel Corporation
 */
#include <common.h>
#include <spi_flash.h>

#include <asm/io.h>

#ifndef CONFIG_SF_DEFAULT_SPEED
# define CONFIG_SF_DEFAULT_SPEED	1000000
#endif
#ifndef CONFIG_SF_DEFAULT_MODE
# define CONFIG_SF_DEFAULT_MODE		SPI_MODE_3
#endif

static struct spi_flash *flash;

static int do_spi_flash_probe(int argc, char *argv[])
{
	unsigned int bus = 0;
	unsigned int cs;
	unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
	unsigned int mode = CONFIG_SF_DEFAULT_MODE;
	char *endp;
	struct spi_flash *new;

	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;
	}

	new = spi_flash_probe(bus, cs, speed, mode);
	if (!new) {
		printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
		return 1;
	}

	if (flash)
		spi_flash_free(flash);
	flash = new;

	printf("%u KiB %s at %u:%u is now current device\n",
			flash->size >> 10, flash->name, bus, cs);

	return 0;

usage:
	puts("Usage: sf probe [bus:]cs [hz] [mode]\n");
	return 1;
}

static int do_spi_flash_read_write(int argc, char *argv[])
{
	unsigned long addr;
	unsigned long offset;
	unsigned long len;
	void *buf;
	char *endp;
	int ret;

	if (argc < 4)
		goto usage;

	addr = simple_strtoul(argv[1], &endp, 16);
	if (*argv[1] == 0 || *endp != 0)
		goto usage;
	offset = simple_strtoul(argv[2], &endp, 16);
	if (*argv[2] == 0 || *endp != 0)
		goto usage;
	len = simple_strtoul(argv[3], &endp, 16);
	if (*argv[3] == 0 || *endp != 0)
		goto usage;

	buf = map_physmem(addr, len, MAP_WRBACK);
	if (!buf) {
		puts("Failed to map physical memory\n");
		return 1;
	}

	if (strcmp(argv[0], "read") == 0)
		ret = spi_flash_read(flash, offset, len, buf);
	else
		ret = spi_flash_write(flash, offset, len, buf);

	unmap_physmem(buf, len);

	if (ret) {
		printf("SPI flash %s failed\n", argv[0]);
		return 1;
	}

	return 0;

usage:
	printf("Usage: sf %s addr offset len\n", argv[0]);
	return 1;
}

static int do_spi_flash_erase(int argc, char *argv[])
{
	unsigned long offset;
	unsigned long len;
	char *endp;
	int ret;

	if (argc < 3)
		goto usage;

	offset = simple_strtoul(argv[1], &endp, 16);
	if (*argv[1] == 0 || *endp != 0)
		goto usage;
	len = simple_strtoul(argv[2], &endp, 16);
	if (*argv[2] == 0 || *endp != 0)
		goto usage;

	ret = spi_flash_erase(flash, offset, len);
	if (ret) {
		printf("SPI flash %s failed\n", argv[0]);
		return 1;
	}

	return 0;

usage:
	puts("Usage: sf erase offset len\n");
	return 1;
}

static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	const char *cmd;

	/* need at least two arguments */
	if (argc < 2)
		goto usage;

	cmd = argv[1];

	if (strcmp(cmd, "probe") == 0)
		return do_spi_flash_probe(argc - 1, argv + 1);

	/* The remaining commands require a selected device */
	if (!flash) {
		puts("No SPI flash selected. Please run `sf probe'\n");
		return 1;
	}

	if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0)
		return do_spi_flash_read_write(argc - 1, argv + 1);
	if (strcmp(cmd, "erase") == 0)
		return do_spi_flash_erase(argc - 1, argv + 1);

usage:
	cmd_usage(cmdtp);
	return 1;
}

U_BOOT_CMD(
	sf,	5,	1,	do_spi_flash,
	"SPI flash sub-system",
	"probe [bus:]cs [hz] [mode]	- init flash device on given SPI bus\n"
	"				  and chip select\n"
	"sf read addr offset len 	- read `len' bytes starting at\n"
	"				  `offset' to memory at `addr'\n"
	"sf write addr offset len	- write `len' bytes from memory\n"
	"				  at `addr' to flash at `offset'\n"
	"sf erase offset len		- erase `len' bytes from `offset'"
);
Commit	Line	Data
b6368467 HS	1	/*
	2	* Command for accessing SPI flash.
	3	*
	4	* Copyright (C) 2008 Atmel Corporation
	5	*/
	6	#include <common.h>
	7	#include <spi_flash.h>
	8
	9	#include <asm/io.h>
	10
	11	#ifndef CONFIG_SF_DEFAULT_SPEED
	12	# define CONFIG_SF_DEFAULT_SPEED 1000000
	13	#endif
	14	#ifndef CONFIG_SF_DEFAULT_MODE
	15	# define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
	16	#endif
	17
	18	static struct spi_flash *flash;
	19
	20	static int do_spi_flash_probe(int argc, char *argv[])
	21	{
	22	unsigned int bus = 0;
	23	unsigned int cs;
	24	unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
	25	unsigned int mode = CONFIG_SF_DEFAULT_MODE;
	26	char *endp;
	27	struct spi_flash *new;
	28
	29	if (argc < 2)
	30	goto usage;
	31
	32	cs = simple_strtoul(argv[1], &endp, 0);
	33	if (argv[1] == 0 \|\| (endp != 0 && *endp != ':'))
	34	goto usage;
	35	if (*endp == ':') {
	36	if (endp[1] == 0)
	37	goto usage;
	38
	39	bus = cs;
	40	cs = simple_strtoul(endp + 1, &endp, 0);
	41	if (*endp != 0)
	42	goto usage;
	43	}
	44
	45	if (argc >= 3) {
	46	speed = simple_strtoul(argv[2], &endp, 0);
	47	if (argv[2] == 0 \|\| endp != 0)
	48	goto usage;
	49	}
	50	if (argc >= 4) {
6e8d58d3	51	mode = simple_strtoul(argv[3], &endp, 16);
b6368467 HS	52	if (argv[3] == 0 \|\| endp != 0)
	53	goto usage;
	54	}
	55
	56	new = spi_flash_probe(bus, cs, speed, mode);
	57	if (!new) {
	58	printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
	59	return 1;
	60	}
	61
	62	if (flash)
	63	spi_flash_free(flash);
	64	flash = new;
	65
	66	printf("%u KiB %s at %u:%u is now current device\n",
	67	flash->size >> 10, flash->name, bus, cs);
	68
	69	return 0;
	70
	71	usage:
	72	puts("Usage: sf probe [bus:]cs [hz] [mode]\n");
	73	return 1;
	74	}
	75
	76	static int do_spi_flash_read_write(int argc, char *argv[])
	77	{
	78	unsigned long addr;
	79	unsigned long offset;
	80	unsigned long len;
	81	void *buf;
	82	char *endp;
	83	int ret;
	84
	85	if (argc < 4)
	86	goto usage;
	87
	88	addr = simple_strtoul(argv[1], &endp, 16);
	89	if (argv[1] == 0 \|\| endp != 0)
	90	goto usage;
	91	offset = simple_strtoul(argv[2], &endp, 16);
	92	if (argv[2] == 0 \|\| endp != 0)
	93	goto usage;
	94	len = simple_strtoul(argv[3], &endp, 16);
	95	if (argv[3] == 0 \|\| endp != 0)
	96	goto usage;
	97
	98	buf = map_physmem(addr, len, MAP_WRBACK);
	99	if (!buf) {
	100	puts("Failed to map physical memory\n");
	101	return 1;
	102	}
	103
	104	if (strcmp(argv[0], "read") == 0)
	105	ret = spi_flash_read(flash, offset, len, buf);
	106	else
	107	ret = spi_flash_write(flash, offset, len, buf);
	108
	109	unmap_physmem(buf, len);
	110
	111	if (ret) {
	112	printf("SPI flash %s failed\n", argv[0]);
	113	return 1;
	114	}
	115
116	return 0;
117
118	usage:
119	printf("Usage: sf %s addr offset len\n", argv[0]);
120	return 1;
121	}
122
123	static int do_spi_flash_erase(int argc, char *argv[])
124	{
125	unsigned long offset;
126	unsigned long len;
127	char *endp;
128	int ret;
129
130	if (argc < 3)
131	goto usage;
132
133	offset = simple_strtoul(argv[1], &endp, 16);
134	if (argv[1] == 0 \|\| endp != 0)
135	goto usage;
136	len = simple_strtoul(argv[2], &endp, 16);
137	if (argv[2] == 0 \|\| endp != 0)
138	goto usage;
139
140	ret = spi_flash_erase(flash, offset, len);
141	if (ret) {
142	printf("SPI flash %s failed\n", argv[0]);
143	return 1;
144	}
145
146	return 0;
147
148	usage:
149	puts("Usage: sf erase offset len\n");
150	return 1;
151	}
152
153	static int do_spi_flash(cmd_tbl_t cmdtp, int flag, int argc, char argv[])
154	{
155	const char *cmd;
156
157	/* need at least two arguments */
158	if (argc < 2)
159	goto usage;
160
161	cmd = argv[1];
162
163	if (strcmp(cmd, "probe") == 0)
164	return do_spi_flash_probe(argc - 1, argv + 1);
165
166	/* The remaining commands require a selected device */
167	if (!flash) {
168	puts("No SPI flash selected. Please run `sf probe'\n");
169	return 1;
170	}
171
172	if (strcmp(cmd, "read") == 0 \|\| strcmp(cmd, "write") == 0)
173	return do_spi_flash_read_write(argc - 1, argv + 1);
174	if (strcmp(cmd, "erase") == 0)
175	return do_spi_flash_erase(argc - 1, argv + 1);
176
177	usage:
62c3ae7c	178	cmd_usage(cmdtp);
b6368467 HS	179	return 1;
	180	}
	181
	182	U_BOOT_CMD(
	183	sf, 5, 1, do_spi_flash,
2fb2604d	184	"SPI flash sub-system",
b6368467 HS	185	"probe [bus:]cs [hz] [mode] - init flash device on given SPI bus\n"
	186	" and chip select\n"
	187	"sf read addr offset len - read `len' bytes starting at\n"
	188	" `offset' to memory at `addr'\n"
	189	"sf write addr offset len - write `len' bytes from memory\n"
	190	" at `addr' to flash at `offset'\n"
a89c33db WD	191	"sf erase offset len - erase `len' bytes from `offset'"
a89c33db WD	192	);