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

/*
 * (C) Copyright 2000, 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Support for read and write access to EEPROM like memory devices. This
 * includes regular EEPROM as well as  FRAM (ferroelectic nonvolaile RAM).
 * FRAM devices read and write data at bus speed. In particular, there is no
 * write delay. Also, there is no limit imposed on the number of bytes that can
 * be transferred with a single read or write.
 *
 * Use the following configuration options to ensure no unneeded performance
 * degradation (typical for EEPROM) is incured for FRAM memory:
 *
 * #define CONFIG_SYS_I2C_FRAM
 * #undef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
 *
 */

#include <common.h>
#include <config.h>
#include <command.h>
#include <i2c.h>

#ifndef	CONFIG_SYS_I2C_SPEED
#define	CONFIG_SYS_I2C_SPEED	50000
#endif

#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS	0
#endif

#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_BITS
#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS	8
#endif

#ifndef	I2C_RXTX_LEN
#define I2C_RXTX_LEN	128
#endif

#define	EEPROM_PAGE_SIZE	(1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
#define	EEPROM_PAGE_OFFSET(x)	((x) & (EEPROM_PAGE_SIZE - 1))

/*
 * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
 *   0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
 *
 * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
 *   0x00000nxx for EEPROM address selectors and page number at n.
 */
#if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || \
	(CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1) || \
	(CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2)
#error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2
#endif
#endif

__weak int eeprom_write_enable(unsigned dev_addr, int state)
{
	return 0;
}

void eeprom_init(int bus)
{
	/* SPI EEPROM */
#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
	spi_init_f();
#endif

	/* I2C EEPROM */
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
#if defined(CONFIG_SYS_I2C)
	if (bus >= 0)
		i2c_set_bus_num(bus);
#endif
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
}

static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
{
	unsigned blk_off;
	int alen;

	blk_off = offset & 0xff;	/* block offset */
#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1
	addr[0] = offset >> 8;		/* block number */
	addr[1] = blk_off;		/* block offset */
	alen = 2;
#else
	addr[0] = offset >> 16;		/* block number */
	addr[1] = offset >>  8;		/* upper address octet */
	addr[2] = blk_off;		/* lower address octet */
	alen = 3;
#endif	/* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */

	addr[0] |= dev_addr;		/* insert device address */

	return alen;
}

static int eeprom_len(unsigned offset, unsigned end)
{
	unsigned len = end - offset;

	/*
	 * For a FRAM device there is no limit on the number of the
	 * bytes that can be ccessed with the single read or write
	 * operation.
	 */
#if !defined(CONFIG_SYS_I2C_FRAM)
	unsigned blk_off = offset & 0xff;
	unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);

	if (maxlen > I2C_RXTX_LEN)
		maxlen = I2C_RXTX_LEN;

	if (len > maxlen)
		len = maxlen;
#endif

	return len;
}

static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
			   uchar *buffer, unsigned len, bool read)
{
	int ret = 0;

	/* SPI */
#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
	if (read)
		spi_read(addr, alen, buffer, len);
	else
		spi_write(addr, alen, buffer, len);
#else	/* I2C */

#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
	i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
#endif

	if (read)
		ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
	else
		ret = i2c_write(addr[0], offset, alen - 1, buffer, len);

	if (ret)
		ret = 1;
#endif
	return ret;
}

static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
		     unsigned cnt, bool read)
{
	unsigned end = offset + cnt;
	unsigned alen, len;
	int rcode = 0;
	uchar addr[3];

	while (offset < end) {
		alen = eeprom_addr(dev_addr, offset, addr);

		len = eeprom_len(offset, end);

		rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);

		buffer += len;
		offset += len;

		if (!read)
			udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
	}

	return rcode;
}

int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
{
	/*
	 * Read data until done or would cross a page boundary.
	 * We must write the address again when changing pages
	 * because the next page may be in a different device.
	 */
	return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
}

int eeprom_write(unsigned dev_addr, unsigned offset,
		 uchar *buffer, unsigned cnt)
{
	int ret;

	eeprom_write_enable(dev_addr, 1);

	/*
	 * Write data until done or would cross a write page boundary.
	 * We must write the address again when changing pages
	 * because the address counter only increments within a page.
	 */
	ret = eeprom_rw(dev_addr, offset, buffer, cnt, 0);

	eeprom_write_enable(dev_addr, 0);
	return ret;
}

#ifdef CONFIG_CMD_EEPROM_LAYOUT
#include <eeprom_layout.h>

__weak int eeprom_parse_layout_version(char *str)
{
	return LAYOUT_VERSION_UNRECOGNIZED;
}

static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE];

#ifndef CONFIG_EEPROM_LAYOUT_HELP_STRING
#define CONFIG_EEPROM_LAYOUT_HELP_STRING "<not defined>"
#endif

enum eeprom_action {
	EEPROM_PRINT,
	EEPROM_UPDATE,
	EEPROM_ACTION_INVALID,
};

static enum eeprom_action parse_action(char *cmd)
{
	if (!strncmp(cmd, "print", 5))
		return EEPROM_PRINT;
	if (!strncmp(cmd, "update", 6))
		return EEPROM_UPDATE;

	return EEPROM_ACTION_INVALID;
}

static int parse_numeric_param(char *str)
{
	char *endptr;
	int value = simple_strtol(str, &endptr, 16);

	return (*endptr != '\0') ? -1 : value;
}

static int eeprom_execute_command(enum eeprom_action action, int i2c_bus,
				  int i2c_addr, int layout_ver, char *key,
				  char *value)
{
	int rcode;
	struct eeprom_layout layout;

	if (action == EEPROM_ACTION_INVALID)
		return CMD_RET_USAGE;

	eeprom_init(i2c_bus);
	rcode = eeprom_read(i2c_addr, 0, eeprom_buf, CONFIG_SYS_EEPROM_SIZE);
	if (rcode < 0)
		return rcode;

	eeprom_layout_setup(&layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE,
			    layout_ver);

	if (action == EEPROM_PRINT) {
		layout.print(&layout);
		return 0;
	}

	layout.update(&layout, key, value);

	rcode = eeprom_write(i2c_addr, 0, layout.data, CONFIG_SYS_EEPROM_SIZE);

	return rcode;
}

#define NEXT_PARAM(argc, index)	{ (argc)--; (index)++; }
static int do_eeprom_layout(cmd_tbl_t *cmdtp, int flag, int argc,
			    char * const argv[])
{
	int layout_ver = LAYOUT_VERSION_AUTODETECT;
	enum eeprom_action action = EEPROM_ACTION_INVALID;
	int i2c_bus = -1, i2c_addr = -1, index = 0;
	char *field_name = "";
	char *field_value = "";

	if (argc <= 1)
		return CMD_RET_USAGE;

	NEXT_PARAM(argc, index); /* Skip program name */

	action = parse_action(argv[index]);
	NEXT_PARAM(argc, index);

	if (argc <= 1)
		return CMD_RET_USAGE;

	if (!strcmp(argv[index], "-l")) {
		NEXT_PARAM(argc, index);

		layout_ver = eeprom_parse_layout_version(argv[index]);
		NEXT_PARAM(argc, index);
	}

	if (argc <= 1)
		return CMD_RET_USAGE;

	i2c_bus = parse_numeric_param(argv[index]);
	NEXT_PARAM(argc, index);

	i2c_addr = parse_numeric_param(argv[index]);
	NEXT_PARAM(argc, index);

	if (action == EEPROM_PRINT)
		goto done;

	if (argc) {
		field_name = argv[index];
		NEXT_PARAM(argc, index);
	}

	if (argc) {
		field_value = argv[index];
		NEXT_PARAM(argc, index);
	}

done:
	return eeprom_execute_command(action, i2c_bus, i2c_addr, layout_ver,
			       field_name, field_value);
}

#endif

static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	const char *const fmt =
		"\nEEPROM @0x%lX %s: addr %08lx  off %04lx  count %ld ... ";
	char * const *args = &argv[2];
	int rcode;
	ulong dev_addr, addr, off, cnt;
	int bus_addr;

#ifdef CONFIG_CMD_EEPROM_LAYOUT
	if (argc >= 2) {
		if (!strcmp(argv[1], "update") || !strcmp(argv[1], "print"))
			return do_eeprom_layout(cmdtp, flag, argc, argv);
	}
#endif

	switch (argc) {
#ifdef CONFIG_SYS_DEF_EEPROM_ADDR
	case 5:
		bus_addr = -1;
		dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR;
		break;
#endif
	case 6:
		bus_addr = -1;
		dev_addr = simple_strtoul(*args++, NULL, 16);
		break;
	case 7:
		bus_addr = simple_strtoul(*args++, NULL, 16);
		dev_addr = simple_strtoul(*args++, NULL, 16);
		break;
	default:
		return CMD_RET_USAGE;
	}

	addr = simple_strtoul(*args++, NULL, 16);
	off = simple_strtoul(*args++, NULL, 16);
	cnt = simple_strtoul(*args++, NULL, 16);

	eeprom_init(bus_addr);

	if (strcmp(argv[1], "read") == 0) {
		printf(fmt, dev_addr, argv[1], addr, off, cnt);

		rcode = eeprom_read(dev_addr, off, (uchar *)addr, cnt);

		puts("done\n");
		return rcode;
	} else if (strcmp(argv[1], "write") == 0) {
		printf(fmt, dev_addr, argv[1], addr, off, cnt);

		rcode = eeprom_write(dev_addr, off, (uchar *)addr, cnt);

		puts("done\n");
		return rcode;
	}

	return CMD_RET_USAGE;
}

U_BOOT_CMD(
	eeprom,	8,	1,	do_eeprom,
	"EEPROM sub-system",
	"read  <bus> <devaddr> addr off cnt\n"
	"eeprom write <bus> <devaddr> addr off cnt\n"
	"       - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
#ifdef CONFIG_CMD_EEPROM_LAYOUT
	"\n"
	"eeprom print [-l <layout_version>] bus devaddr\n"
	"       - Print layout fields and their data in human readable format\n"
	"eeprom update [-l <layout_version>] bus devaddr <field_name> <field_value>\n"
	"       - Update a specific eeprom field with new data.\n"
	"         The new data must be written in the same human readable format as shown by the print command.\n"
	"\n"
	"LAYOUT VERSIONS\n"
	"The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n"
	"If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n"
	"The values which can be provided with the -l option are:\n"
	CONFIG_EEPROM_LAYOUT_HELP_STRING"\n"
#endif
)
Commit	Line	Data
3863585b WD	1	/*
	2	* (C) Copyright 2000, 2001
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
3863585b WD	6	*/
3863585b WD	7
d4f5c728	8	/*
	9	* Support for read and write access to EEPROM like memory devices. This
	10	* includes regular EEPROM as well as FRAM (ferroelectic nonvolaile RAM).
	11	* FRAM devices read and write data at bus speed. In particular, there is no
e506a006	12	* write delay. Also, there is no limit imposed on the number of bytes that can
d4f5c728	13	* be transferred with a single read or write.
6617aae9	14	*
d4f5c728	15	* Use the following configuration options to ensure no unneeded performance
d4f5c728	16	* degradation (typical for EEPROM) is incured for FRAM memory:
6617aae9	17	*
6d0f6bcf JCPV	18	* #define CONFIG_SYS_I2C_FRAM
6d0f6bcf JCPV	19	* #undef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
d4f5c728	20	*
	21	*/
	22
3863585b WD	23	#include <common.h>
	24	#include <config.h>
	25	#include <command.h>
	26	#include <i2c.h>
	27
4f296d09 MV	28	#ifndef CONFIG_SYS_I2C_SPEED
4f296d09 MV	29	#define CONFIG_SYS_I2C_SPEED 50000
98f4a3df	30	#endif
3863585b	31
d738746c MV	32	#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
	33	#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 0
	34	#endif
	35
6717e3c8 MV	36	#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_BITS
	37	#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 8
	38	#endif
	39
a6e7b774 MS	40	#ifndef I2C_RXTX_LEN
	41	#define I2C_RXTX_LEN 128
	42	#endif
	43
6717e3c8 MV	44	#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
	45	#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1))
	46
4f296d09	47	/*
6d0f6bcf	48	* for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
3863585b WD	49	* 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
3863585b WD	50	*
6d0f6bcf	51	* for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
3863585b WD	52	* 0x00000nxx for EEPROM address selectors and page number at n.
3863585b WD	53	*/
548738b4	54	#if !defined(CONFIG_SPI) \|\| defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
4f296d09	55	#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) \|\| \
d4e69e61 MV	56	(CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1) \|\| \
d4e69e61 MV	57	(CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2)
6d0f6bcf	58	#error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2
3863585b WD	59	#endif
	60	#endif
	61
52cd47c9 MV	62	__weak int eeprom_write_enable(unsigned dev_addr, int state)
	63	{
	64	return 0;
	65	}
4f296d09	66
354e3ed7	67	void eeprom_init(int bus)
4f296d09 MV	68	{
	69	/* SPI EEPROM */
	70	#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
8eee40a6	71	spi_init_f();
4f296d09 MV	72	#endif
	73
	74	/* I2C EEPROM */
2636ac65	75	#if defined(CONFIG_HARD_I2C) \|\| defined(CONFIG_SYS_I2C)
354e3ed7 MV	76	#if defined(CONFIG_SYS_I2C)
	77	if (bus >= 0)
	78	i2c_set_bus_num(bus);
	79	#endif
4f296d09 MV	80	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
	81	#endif
	82	}
	83
02c321cf MV	84	static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
	85	{
	86	unsigned blk_off;
	87	int alen;
	88
	89	blk_off = offset & 0xff; /* block offset */
	90	#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1
	91	addr[0] = offset >> 8; /* block number */
	92	addr[1] = blk_off; /* block offset */
	93	alen = 2;
	94	#else
	95	addr[0] = offset >> 16; /* block number */
	96	addr[1] = offset >> 8; /* upper address octet */
	97	addr[2] = blk_off; /* lower address octet */
	98	alen = 3;
	99	#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */
	100
	101	addr[0] \|= dev_addr; /* insert device address */
	102
	103	return alen;
	104	}
	105
39b6f98b MV	106	static int eeprom_len(unsigned offset, unsigned end)
	107	{
	108	unsigned len = end - offset;
	109
	110	/*
	111	* For a FRAM device there is no limit on the number of the
	112	* bytes that can be ccessed with the single read or write
	113	* operation.
	114	*/
	115	#if !defined(CONFIG_SYS_I2C_FRAM)
	116	unsigned blk_off = offset & 0xff;
	117	unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
	118
	119	if (maxlen > I2C_RXTX_LEN)
	120	maxlen = I2C_RXTX_LEN;
	121
	122	if (len > maxlen)
	123	len = maxlen;
	124	#endif
	125
	126	return len;
	127	}
	128
9132088b MV	129	static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
	130	uchar *buffer, unsigned len, bool read)
	131	{
	132	int ret = 0;
	133
	134	/* SPI */
	135	#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
	136	if (read)
	137	spi_read(addr, alen, buffer, len);
	138	else
	139	spi_write(addr, alen, buffer, len);
	140	#else /* I2C */
	141
	142	#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
	143	i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
	144	#endif
	145
	146	if (read)
	147	ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
	148	else
	149	ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
	150
	151	if (ret)
	152	ret = 1;
	153	#endif
	154	return ret;
	155	}
	156
1a37889b MV	157	static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
1a37889b MV	158	unsigned cnt, bool read)
3863585b WD	159	{
3863585b WD	160	unsigned end = offset + cnt;
1a37889b	161	unsigned alen, len;
3863585b	162	int rcode = 0;
02c321cf	163	uchar addr[3];
3863585b	164
3863585b	165	while (offset < end) {
02c321cf	166	alen = eeprom_addr(dev_addr, offset, addr);
3863585b	167
39b6f98b	168	len = eeprom_len(offset, end);
d4f5c728	169
1a37889b	170	rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);
9132088b	171
3863585b WD	172	buffer += len;
3863585b WD	173	offset += len;
1a37889b MV	174
	175	if (!read)
	176	udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
3863585b	177	}
d4f5c728	178
3863585b WD	179	return rcode;
	180	}
	181
1a37889b	182	int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
3863585b	183	{
1a37889b MV	184	/*
	185	* Read data until done or would cross a page boundary.
	186	* We must write the address again when changing pages
	187	* because the next page may be in a different device.
	188	*/
	189	return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
	190	}
	191
d4e69e61 MV	192	int eeprom_write(unsigned dev_addr, unsigned offset,
d4e69e61 MV	193	uchar *buffer, unsigned cnt)
1a37889b MV	194	{
1a37889b MV	195	int ret;
3863585b	196
52cd47c9 MV	197	eeprom_write_enable(dev_addr, 1);
52cd47c9 MV	198
4f296d09 MV	199	/*
4f296d09 MV	200	* Write data until done or would cross a write page boundary.
3863585b WD	201	* We must write the address again when changing pages
	202	* because the address counter only increments within a page.
	203	*/
52bc7c7e	204	ret = eeprom_rw(dev_addr, offset, buffer, cnt, 0);
52cd47c9 MV	205
52cd47c9 MV	206	eeprom_write_enable(dev_addr, 0);
1a37889b	207	return ret;
3863585b WD	208	}
3863585b WD	209
aa9e6044 NK	210	#ifdef CONFIG_CMD_EEPROM_LAYOUT
	211	#include <eeprom_layout.h>
	212
	213	__weak int eeprom_parse_layout_version(char *str)
	214	{
	215	return LAYOUT_VERSION_UNRECOGNIZED;
	216	}
	217
	218	static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE];
	219
	220	#ifndef CONFIG_EEPROM_LAYOUT_HELP_STRING
	221	#define CONFIG_EEPROM_LAYOUT_HELP_STRING "<not defined>"
	222	#endif
	223
	224	enum eeprom_action {
	225	EEPROM_PRINT,
	226	EEPROM_UPDATE,
	227	EEPROM_ACTION_INVALID,
	228	};
	229
	230	static enum eeprom_action parse_action(char *cmd)
	231	{
	232	if (!strncmp(cmd, "print", 5))
	233	return EEPROM_PRINT;
	234	if (!strncmp(cmd, "update", 6))
	235	return EEPROM_UPDATE;
	236
	237	return EEPROM_ACTION_INVALID;
	238	}
	239
	240	static int parse_numeric_param(char *str)
	241	{
	242	char *endptr;
	243	int value = simple_strtol(str, &endptr, 16);
	244
	245	return (*endptr != '\0') ? -1 : value;
	246	}
	247
	248	static int eeprom_execute_command(enum eeprom_action action, int i2c_bus,
	249	int i2c_addr, int layout_ver, char *key,
	250	char *value)
	251	{
	252	int rcode;
	253	struct eeprom_layout layout;
	254
	255	if (action == EEPROM_ACTION_INVALID)
	256	return CMD_RET_USAGE;
	257
	258	eeprom_init(i2c_bus);
	259	rcode = eeprom_read(i2c_addr, 0, eeprom_buf, CONFIG_SYS_EEPROM_SIZE);
	260	if (rcode < 0)
	261	return rcode;
	262
	263	eeprom_layout_setup(&layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE,
	264	layout_ver);
	265
	266	if (action == EEPROM_PRINT) {
	267	layout.print(&layout);
	268	return 0;
	269	}
	270
	271	layout.update(&layout, key, value);
	272
	273	rcode = eeprom_write(i2c_addr, 0, layout.data, CONFIG_SYS_EEPROM_SIZE);
274
275	return rcode;
276	}
277
278	#define NEXT_PARAM(argc, index) { (argc)--; (index)++; }
279	static int do_eeprom_layout(cmd_tbl_t *cmdtp, int flag, int argc,
280	char * const argv[])
281	{
282	int layout_ver = LAYOUT_VERSION_AUTODETECT;
283	enum eeprom_action action = EEPROM_ACTION_INVALID;
284	int i2c_bus = -1, i2c_addr = -1, index = 0;
285	char *field_name = "";
286	char *field_value = "";
287
288	if (argc <= 1)
289	return CMD_RET_USAGE;
290
291	NEXT_PARAM(argc, index); /* Skip program name */
292
293	action = parse_action(argv[index]);
294	NEXT_PARAM(argc, index);
295
296	if (argc <= 1)
297	return CMD_RET_USAGE;
298
299	if (!strcmp(argv[index], "-l")) {
300	NEXT_PARAM(argc, index);
301
302	layout_ver = eeprom_parse_layout_version(argv[index]);
303	NEXT_PARAM(argc, index);
304	}
305
306	if (argc <= 1)
307	return CMD_RET_USAGE;
308
309	i2c_bus = parse_numeric_param(argv[index]);
310	NEXT_PARAM(argc, index);
311
312	i2c_addr = parse_numeric_param(argv[index]);
313	NEXT_PARAM(argc, index);
314
315	if (action == EEPROM_PRINT)
316	goto done;
317
318	if (argc) {
319	field_name = argv[index];
320	NEXT_PARAM(argc, index);
321	}
322
323	if (argc) {
324	field_value = argv[index];
325	NEXT_PARAM(argc, index);
326	}
327
328	done:
329	return eeprom_execute_command(action, i2c_bus, i2c_addr, layout_ver,
330	field_name, field_value);
331	}
332
333	#endif
334
4f296d09	335	static int do_eeprom(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
3863585b	336	{
4f296d09 MV	337	const char *const fmt =
4f296d09 MV	338	"\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... ";
e4f65d00 MV	339	char * const *args = &argv[2];
	340	int rcode;
	341	ulong dev_addr, addr, off, cnt;
d4fec4e9	342	int bus_addr;
e4f65d00	343
aa9e6044 NK	344	#ifdef CONFIG_CMD_EEPROM_LAYOUT
	345	if (argc >= 2) {
	346	if (!strcmp(argv[1], "update") \|\| !strcmp(argv[1], "print"))
	347	return do_eeprom_layout(cmdtp, flag, argc, argv);
	348	}
	349	#endif
	350
e4f65d00 MV	351	switch (argc) {
	352	#ifdef CONFIG_SYS_DEF_EEPROM_ADDR
	353	case 5:
d4fec4e9	354	bus_addr = -1;
e4f65d00 MV	355	dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR;
	356	break;
	357	#endif
	358	case 6:
d4fec4e9 MV	359	bus_addr = -1;
	360	dev_addr = simple_strtoul(*args++, NULL, 16);
	361	break;
	362	case 7:
	363	bus_addr = simple_strtoul(*args++, NULL, 16);
e4f65d00 MV	364	dev_addr = simple_strtoul(*args++, NULL, 16);
	365	break;
	366	default:
	367	return CMD_RET_USAGE;
	368	}
548738b4	369
e4f65d00 MV	370	addr = simple_strtoul(*args++, NULL, 16);
	371	off = simple_strtoul(*args++, NULL, 16);
	372	cnt = simple_strtoul(*args++, NULL, 16);
548738b4	373
d4fec4e9	374	eeprom_init(bus_addr);
90253178	375
d4e69e61	376	if (strcmp(argv[1], "read") == 0) {
e4f65d00	377	printf(fmt, dev_addr, argv[1], addr, off, cnt);
4f296d09	378
d4e69e61	379	rcode = eeprom_read(dev_addr, off, (uchar *)addr, cnt);
4f296d09	380
d4e69e61	381	puts("done\n");
e4f65d00	382	return rcode;
d4e69e61	383	} else if (strcmp(argv[1], "write") == 0) {
e4f65d00	384	printf(fmt, dev_addr, argv[1], addr, off, cnt);
4f296d09	385
d4e69e61	386	rcode = eeprom_write(dev_addr, off, (uchar *)addr, cnt);
4f296d09	387
d4e69e61	388	puts("done\n");
e4f65d00	389	return rcode;
4f296d09 MV	390	}
	391
	392	return CMD_RET_USAGE;
	393	}
8bde7f77	394
0d498393	395	U_BOOT_CMD(
aa9e6044	396	eeprom, 8, 1, do_eeprom,
2fb2604d	397	"EEPROM sub-system",
d4fec4e9 MV	398	"read <bus> <devaddr> addr off cnt\n"
d4fec4e9 MV	399	"eeprom write <bus> <devaddr> addr off cnt\n"
a89c33db	400	" - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
aa9e6044 NK	401	#ifdef CONFIG_CMD_EEPROM_LAYOUT
	402	"\n"
	403	"eeprom print [-l <layout_version>] bus devaddr\n"
	404	" - Print layout fields and their data in human readable format\n"
	405	"eeprom update [-l <layout_version>] bus devaddr <field_name> <field_value>\n"
	406	" - Update a specific eeprom field with new data.\n"
	407	" The new data must be written in the same human readable format as shown by the print command.\n"
	408	"\n"
	409	"LAYOUT VERSIONS\n"
	410	"The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n"
	411	"If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n"
	412	"The values which can be provided with the -l option are:\n"
	413	CONFIG_EEPROM_LAYOUT_HELP_STRING"\n"
	414	#endif
0e350f81	415	)