board/gateworks/gw_ventana/eeprom.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014 Gateworks Corporation
  * Author: Tim Harvey <tharvey@gateworks.com>
  */

 #include <command.h>
 #include <gsc.h>
 #include <hexdump.h>
 #include <i2c.h>
 #include <asm/arch/sys_proto.h>
 #include <dm/device.h>
 #include <dm/uclass.h>
 #include <linux/ctype.h>
 #include <linux/delay.h>

 #include "eeprom.h"

 /*
  * EEPROM board info struct populated by read_eeprom so that we only have to
  * read it once.
  */
 struct ventana_board_info ventana_info;
 int board_type;

 #if CONFIG_IS_ENABLED(DM_I2C)
 struct udevice *i2c_get_dev(int busno, int slave)
 {
 	struct udevice *dev, *bus;
 	int ret;

 	ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
 	if (ret)
 		return NULL;
 	ret = dm_i2c_probe(bus, slave, 0, &dev);
 	if (ret)
 		return NULL;

 	return dev;
 }
 #endif

 /*
  * The Gateworks System Controller will fail to ACK a master transaction if
  * it is busy, which can occur during its 1HZ timer tick while reading ADC's.
  * When this does occur, it will never be busy long enough to fail more than
  * 2 back-to-back transfers.  Thus we wrap i2c_read and i2c_write with
  * 3 retries.
  */
 int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
 {
 	int retry = 3;
 	int n = 0;
 	int ret;
 #if CONFIG_IS_ENABLED(DM_I2C)
 	struct udevice *dev;

 	dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
 	if (!dev)
 		return -ENODEV;
 	ret = i2c_set_chip_offset_len(dev, alen);
 	if (ret) {
 		puts("EEPROM: Failed to set alen\n");
 		return ret;
 	}
 #else
 	i2c_set_bus_num(BOARD_EEPROM_BUSNO);
 #endif

 	while (n++ < retry) {
 #if CONFIG_IS_ENABLED(DM_I2C)
 		ret = dm_i2c_read(dev, addr, buf, len);
 #else
 		ret = i2c_read(chip, addr, alen, buf, len);
 #endif
 		if (!ret)
 			break;
 		debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
 		      n, ret);
 		if (ret != -ENODEV)
 			break;
 		mdelay(10);
 	}
 	return ret;
 }

 int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
 {
 	int retry = 3;
 	int n = 0;
 	int ret;
 #if CONFIG_IS_ENABLED(DM_I2C)
 	struct udevice *dev;

 	dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
 	if (!dev)
 		return -ENODEV;
 	ret = i2c_set_chip_offset_len(dev, alen);
 	if (ret) {
 		puts("EEPROM: Failed to set alen\n");
 		return ret;
 	}
 #endif

 	while (n++ < retry) {
 #if CONFIG_IS_ENABLED(DM_I2C)
 		ret = dm_i2c_write(dev, addr, buf, len);
 #else
 		ret = i2c_write(chip, addr, alen, buf, len);
 #endif
 		if (!ret)
 			break;
 		debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
 		      n, ret);
 		if (ret != -ENODEV)
 			break;
 		mdelay(10);
 	}
 	mdelay(100);
 	return ret;
 }

 /* determine BOM revision from model */
 int get_bom_rev(const char *str)
 {
 	int  rev_bom = 0;
 	int i;

 	for (i = strlen(str) - 1; i > 0; i--) {
 		if (str[i] == '-')
 			break;
 		if (str[i] >= '1' && str[i] <= '9') {
 			rev_bom = str[i] - '0';
 			break;
 		}
 	}
 	return rev_bom;
 }

 /* determine PCB revision from model */
 char get_pcb_rev(const char *str)
 {
 	char rev_pcb = 'A';
 	int i;

 	for (i = strlen(str) - 1; i > 0; i--) {
 		if (str[i] == '-')
 			break;
 		if (str[i] >= 'A') {
 			rev_pcb = str[i];
 			break;
 		}
 	}
 	return rev_pcb;
 }

 /*
  * get dt name based on model and detail level:
  */
 const char *gsc_get_dtb_name(int level, char *buf, int sz)
 {
 	const char *model = (const char *)ventana_info.model;
 	const char *pre = is_mx6dq() ? "imx6q-" : "imx6dl-";
 	int modelno, rev_pcb, rev_bom;

 	/* a few board models are dt equivalents to other models */
 	if (strncasecmp(model, "gw5906", 6) == 0)
 		model = "gw552x-d";
 	else if (strncasecmp(model, "gw5908", 6) == 0)
 		model = "gw53xx-f";
 	else if (strncasecmp(model, "gw5905", 6) == 0)
 		model = "gw5904-a";

 	modelno = ((model[2] - '0') * 1000)
 		  + ((model[3] - '0') * 100)
 		  + ((model[4] - '0') * 10)
 		  + (model[5] - '0');
 	rev_pcb = tolower(get_pcb_rev(model));
 	rev_bom = get_bom_rev(model);

 	/* compare model/rev/bom in order of most specific to least */
 	snprintf(buf, sz, "%s%04d", pre, modelno);
 	switch (level) {
 	case 0: /* full model first (ie gw5400-a1) */
 		if (rev_bom) {
 			snprintf(buf, sz, "%sgw%04d-%c%d", pre, modelno, rev_pcb, rev_bom);
 			break;
 		}
 		fallthrough;
 	case 1: /* don't care about bom rev (ie gw5400-a) */
 		snprintf(buf, sz, "%sgw%04d-%c", pre, modelno, rev_pcb);
 		break;
 	case 2: /* don't care about the pcb rev (ie gw5400) */
 		snprintf(buf, sz, "%sgw%04d", pre, modelno);
 		break;
 	case 3: /* look for generic model (ie gw540x) */
 		snprintf(buf, sz, "%sgw%03dx", pre, modelno / 10);
 		break;
 	case 4: /* look for more generic model (ie gw54xx) */
 		snprintf(buf, sz, "%sgw%02dxx", pre, modelno / 100);
 		break;
 	default: /* give up */
 		return NULL;
 	}

 	return buf;
 }
 /* read ventana EEPROM, check for validity, and return baseboard type */
 int
 read_eeprom(struct ventana_board_info *info)
 {
 	int i;
 	int chksum;
 	char baseboard;
 	int type;
 	unsigned char *buf = (unsigned char *)info;

 	memset(info, 0, sizeof(*info));

 	/* read eeprom config section */
 	if (gsc_i2c_read(BOARD_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
 		puts("EEPROM: Failed to read EEPROM\n");
 		return GW_UNKNOWN;
 	}

 	/* sanity checks */
 	if (info->model[0] != 'G' || info->model[1] != 'W') {
 		puts("EEPROM: Invalid Model in EEPROM\n");
 		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
 				     sizeof(*info));
 		return GW_UNKNOWN;
 	}

 	/* validate checksum */
 	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
 		chksum += buf[i];
 	if ((info->chksum[0] != chksum>>8) ||
 	    (info->chksum[1] != (chksum&0xff))) {
 		puts("EEPROM: Failed EEPROM checksum\n");
 		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
 				     sizeof(*info));
 		return GW_UNKNOWN;
 	}

 	/* original GW5400-A prototype */
 	baseboard = info->model[3];
 	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
 		baseboard = '0';

 	type = GW_UNKNOWN;
 	switch (baseboard) {
 	case '0': /* original GW5400-A prototype */
 		type = GW54proto;
 		break;
 	case '1':
 		type = GW51xx;
 		break;
 	case '2':
 		type = GW52xx;
 		break;
 	case '3':
 		type = GW53xx;
 		break;
 	case '4':
 		type = GW54xx;
 		break;
 	case '5':
 		if (info->model[4] == '1') {
 			type = GW551x;
 			break;
 		} else if (info->model[4] == '2') {
 			type = GW552x;
 			break;
 		} else if (info->model[4] == '3') {
 			type = GW553x;
 			break;
 		}
 		break;
 	case '6':
 		if (info->model[4] == '0')
 			type = GW560x;
 		break;
 	case '9':
 		if (info->model[4] == '0' && info->model[5] == '1')
 			type = GW5901;
 		else if (info->model[4] == '0' && info->model[5] == '2')
 			type = GW5902;
 		else if (info->model[4] == '0' && info->model[5] == '3')
 			type = GW5903;
 		else if (info->model[4] == '0' && info->model[5] == '4')
 			type = GW5904;
 		else if (info->model[4] == '0' && info->model[5] == '5')
 			type = GW5905;
 		else if (info->model[4] == '0' && info->model[5] == '6')
 			type = GW5906;
 		else if (info->model[4] == '0' && info->model[5] == '7')
 			type = GW5907;
 		else if (info->model[4] == '0' && info->model[5] == '8')
 			type = GW5908;
 		else if (info->model[4] == '0' && info->model[5] == '9')
 			type = GW5909;
 		else if (info->model[4] == '1' && info->model[5] == '0')
 			type = GW5910;
 		else if (info->model[4] == '1' && info->model[5] == '2')
 			type = GW5912;
 		else if (info->model[4] == '1' && info->model[5] == '3')
 			type = GW5913;
 		break;
 	default:
 		printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
 		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
 				     sizeof(*info));
 		break;
 	}
 	return type;
 }

 /* list of config bits that the bootloader will remove from dtb if not set */
 struct ventana_eeprom_config econfig[] = {
 	{ "eth0", "ethernet0", EECONFIG_ETH0 },
 	{ "usb0", NULL, EECONFIG_USB0 },
 	{ "usb1", NULL, EECONFIG_USB1 },
 	{ "mmc0", NULL, EECONFIG_SD0 },
 	{ "mmc1", NULL, EECONFIG_SD1 },
 	{ "mmc2", NULL, EECONFIG_SD2 },
 	{ "mmc3", NULL, EECONFIG_SD3 },
 	{ /* Sentinel */ }
 };

 #if defined(CONFIG_CMD_EECONFIG) && !defined(CONFIG_XPL_BUILD)
 static struct ventana_eeprom_config *get_config(const char *name)
 {
 	struct ventana_eeprom_config *cfg = econfig;

 	while (cfg->name) {
 		if (0 == strcmp(name, cfg->name))
 			return cfg;
 		cfg++;
 	}
 	return NULL;
 }

 static u8 econfig_bytes[sizeof(ventana_info.config)];
 static int econfig_init = -1;

 static int do_econfig(struct cmd_tbl *cmdtp, int flag, int argc,
 		      char *const argv[])
 {
 	struct ventana_eeprom_config *cfg;
 	struct ventana_board_info *info = &ventana_info;
 	int i;

 	if (argc < 2)
 		return CMD_RET_USAGE;

 	/* initialize */
 	if (econfig_init != 1) {
 		memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
 		econfig_init = 1;
 	}

 	/* list configs */
 	if ((strncmp(argv[1], "list", 4) == 0)) {
 		cfg = econfig;
 		while (cfg->name) {
 			printf("%s: %d\n", cfg->name,
 			       test_bit(cfg->bit, econfig_bytes) ?  1 : 0);
 			cfg++;
 		}
 	}

 	/* save */
 	else if ((strncmp(argv[1], "save", 4) == 0)) {
 		unsigned char *buf = (unsigned char *)info;
 		int chksum;

 		/* calculate new checksum */
 		memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
 		for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
 			chksum += buf[i];
 		debug("old chksum:0x%04x\n",
 		      (info->chksum[0] << 8) | info->chksum[1]);
 		debug("new chksum:0x%04x\n", chksum);
 		info->chksum[0] = chksum >> 8;
 		info->chksum[1] = chksum & 0xff;

 		/* write new config data */
 		if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->config - (u8 *)info,
 				  1, econfig_bytes, sizeof(econfig_bytes))) {
 			printf("EEPROM: Failed updating config\n");
 			return CMD_RET_FAILURE;
 		}

 		/* write new config data */
 		if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->chksum - (u8 *)info,
 				  1, info->chksum, 2)) {
 			printf("EEPROM: Failed updating checksum\n");
 			return CMD_RET_FAILURE;
 		}

 		printf("Config saved to EEPROM\n");
 	}

 	/* get config */
 	else if (argc == 2) {
 		cfg = get_config(argv[1]);
 		if (cfg) {
 			printf("%s: %d\n", cfg->name,
 			       test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
 		} else {
 			printf("invalid config: %s\n", argv[1]);
 			return CMD_RET_FAILURE;
 		}
 	}

 	/* set config */
 	else if (argc == 3) {
 		cfg = get_config(argv[1]);
 		if (cfg) {
 			if (simple_strtol(argv[2], NULL, 10)) {
 				test_and_set_bit(cfg->bit, econfig_bytes);
 				printf("Enabled %s\n", cfg->name);
 			} else {
 				test_and_clear_bit(cfg->bit, econfig_bytes);
 				printf("Disabled %s\n", cfg->name);
 			}
 		} else {
 			printf("invalid config: %s\n", argv[1]);
 			return CMD_RET_FAILURE;
 		}
 	}

 	else
 		return CMD_RET_USAGE;

 	return CMD_RET_SUCCESS;
 }

 U_BOOT_CMD(
 	econfig, 3, 0, do_econfig,
 	"EEPROM configuration",
 	"list - list config\n"
 	"save - save config to EEPROM\n"
 	"<name> - get config 'name'\n"
 	"<name> [0|1] - set config 'name' to value\n"
 );

 #endif /* CONFIG_CMD_EECONFIG */
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2014 Gateworks Corporation
	* Author: Tim Harvey <tharvey@gateworks.com>
	*/

	#include <command.h>
	#include <gsc.h>
	#include <hexdump.h>
	#include <i2c.h>
	#include <asm/arch/sys_proto.h>
	#include <dm/device.h>
	#include <dm/uclass.h>
	#include <linux/ctype.h>
	#include <linux/delay.h>

	#include "eeprom.h"

	/*
	* EEPROM board info struct populated by read_eeprom so that we only have to
	* read it once.
	*/
	struct ventana_board_info ventana_info;
	int board_type;

	#if CONFIG_IS_ENABLED(DM_I2C)
	struct udevice *i2c_get_dev(int busno, int slave)
	{
	struct udevice dev, bus;
	int ret;

	ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
	if (ret)
	return NULL;
	ret = dm_i2c_probe(bus, slave, 0, &dev);
	if (ret)
	return NULL;

	return dev;
	}
	#endif

	/*
	* The Gateworks System Controller will fail to ACK a master transaction if
	* it is busy, which can occur during its 1HZ timer tick while reading ADC's.
	* When this does occur, it will never be busy long enough to fail more than
	* 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with
	* 3 retries.
	*/
	int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
	{
	int retry = 3;
	int n = 0;
	int ret;
	#if CONFIG_IS_ENABLED(DM_I2C)
	struct udevice *dev;

	dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
	if (!dev)
	return -ENODEV;
	ret = i2c_set_chip_offset_len(dev, alen);
	if (ret) {
	puts("EEPROM: Failed to set alen\n");
	return ret;
	}
	#else
	i2c_set_bus_num(BOARD_EEPROM_BUSNO);
	#endif

	while (n++ < retry) {
	#if CONFIG_IS_ENABLED(DM_I2C)
	ret = dm_i2c_read(dev, addr, buf, len);
	#else
	ret = i2c_read(chip, addr, alen, buf, len);
	#endif
	if (!ret)
	break;
	debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
	n, ret);
	if (ret != -ENODEV)
	break;
	mdelay(10);
	}
	return ret;
	}

	int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
	{
	int retry = 3;
	int n = 0;
	int ret;
	#if CONFIG_IS_ENABLED(DM_I2C)
	struct udevice *dev;

	dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
	if (!dev)
	return -ENODEV;
	ret = i2c_set_chip_offset_len(dev, alen);
	if (ret) {
	puts("EEPROM: Failed to set alen\n");
	return ret;
	}
	#endif

	while (n++ < retry) {
	#if CONFIG_IS_ENABLED(DM_I2C)
	ret = dm_i2c_write(dev, addr, buf, len);
	#else
	ret = i2c_write(chip, addr, alen, buf, len);
	#endif
	if (!ret)
	break;
	debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
	n, ret);
	if (ret != -ENODEV)
	break;
	mdelay(10);
	}
	mdelay(100);
	return ret;
	}

	/* determine BOM revision from model */
	int get_bom_rev(const char *str)
	{
	int rev_bom = 0;
	int i;

	for (i = strlen(str) - 1; i > 0; i--) {
	if (str[i] == '-')
	break;
	if (str[i] >= '1' && str[i] <= '9') {
	rev_bom = str[i] - '0';
	break;
	}
	}
	return rev_bom;
	}

	/* determine PCB revision from model */
	char get_pcb_rev(const char *str)
	{
	char rev_pcb = 'A';
	int i;

	for (i = strlen(str) - 1; i > 0; i--) {
	if (str[i] == '-')
	break;
	if (str[i] >= 'A') {
	rev_pcb = str[i];
	break;
	}
	}
	return rev_pcb;
	}

	/*
	* get dt name based on model and detail level:
	*/
	const char gsc_get_dtb_name(int level, char buf, int sz)
	{
	const char model = (const char )ventana_info.model;
	const char *pre = is_mx6dq() ? "imx6q-" : "imx6dl-";
	int modelno, rev_pcb, rev_bom;

	/* a few board models are dt equivalents to other models */
	if (strncasecmp(model, "gw5906", 6) == 0)
	model = "gw552x-d";
	else if (strncasecmp(model, "gw5908", 6) == 0)
	model = "gw53xx-f";
	else if (strncasecmp(model, "gw5905", 6) == 0)
	model = "gw5904-a";

	modelno = ((model[2] - '0') * 1000)
	+ ((model[3] - '0') * 100)
	+ ((model[4] - '0') * 10)
	+ (model[5] - '0');
	rev_pcb = tolower(get_pcb_rev(model));
	rev_bom = get_bom_rev(model);

	/* compare model/rev/bom in order of most specific to least */
	snprintf(buf, sz, "%s%04d", pre, modelno);
	switch (level) {
	case 0: /* full model first (ie gw5400-a1) */
	if (rev_bom) {
	snprintf(buf, sz, "%sgw%04d-%c%d", pre, modelno, rev_pcb, rev_bom);
	break;
	}
	fallthrough;
	case 1: /* don't care about bom rev (ie gw5400-a) */
	snprintf(buf, sz, "%sgw%04d-%c", pre, modelno, rev_pcb);
	break;
	case 2: /* don't care about the pcb rev (ie gw5400) */
	snprintf(buf, sz, "%sgw%04d", pre, modelno);
	break;
	case 3: /* look for generic model (ie gw540x) */
	snprintf(buf, sz, "%sgw%03dx", pre, modelno / 10);
	break;
	case 4: /* look for more generic model (ie gw54xx) */
	snprintf(buf, sz, "%sgw%02dxx", pre, modelno / 100);
	break;
	default: /* give up */
	return NULL;
	}

	return buf;
	}
	/* read ventana EEPROM, check for validity, and return baseboard type */
	int
	read_eeprom(struct ventana_board_info *info)
	{
	int i;
	int chksum;
	char baseboard;
	int type;
	unsigned char buf = (unsigned char )info;

	memset(info, 0, sizeof(*info));

	/* read eeprom config section */
	if (gsc_i2c_read(BOARD_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
	puts("EEPROM: Failed to read EEPROM\n");
	return GW_UNKNOWN;
	}

	/* sanity checks */
	if (info->model[0] != 'G' \|\| info->model[1] != 'W') {
	puts("EEPROM: Invalid Model in EEPROM\n");
	print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
	sizeof(*info));
	return GW_UNKNOWN;
	}

	/* validate checksum */
	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
	chksum += buf[i];
	if ((info->chksum[0] != chksum>>8) \|\|
	(info->chksum[1] != (chksum&0xff))) {
	puts("EEPROM: Failed EEPROM checksum\n");
	print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
	sizeof(*info));
	return GW_UNKNOWN;
	}

	/* original GW5400-A prototype */
	baseboard = info->model[3];
	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
	baseboard = '0';

	type = GW_UNKNOWN;
	switch (baseboard) {
	case '0': /* original GW5400-A prototype */
	type = GW54proto;
	break;
	case '1':
	type = GW51xx;
	break;
	case '2':
	type = GW52xx;
	break;
	case '3':
	type = GW53xx;
	break;
	case '4':
	type = GW54xx;
	break;
	case '5':
	if (info->model[4] == '1') {
	type = GW551x;
	break;
	} else if (info->model[4] == '2') {
	type = GW552x;
	break;
	} else if (info->model[4] == '3') {
	type = GW553x;
	break;
	}
	break;
	case '6':
	if (info->model[4] == '0')
	type = GW560x;
	break;
	case '9':
	if (info->model[4] == '0' && info->model[5] == '1')
	type = GW5901;
	else if (info->model[4] == '0' && info->model[5] == '2')
	type = GW5902;
	else if (info->model[4] == '0' && info->model[5] == '3')
	type = GW5903;
	else if (info->model[4] == '0' && info->model[5] == '4')
	type = GW5904;
	else if (info->model[4] == '0' && info->model[5] == '5')
	type = GW5905;
	else if (info->model[4] == '0' && info->model[5] == '6')
	type = GW5906;
	else if (info->model[4] == '0' && info->model[5] == '7')
	type = GW5907;
	else if (info->model[4] == '0' && info->model[5] == '8')
	type = GW5908;
	else if (info->model[4] == '0' && info->model[5] == '9')
	type = GW5909;
	else if (info->model[4] == '1' && info->model[5] == '0')
	type = GW5910;
	else if (info->model[4] == '1' && info->model[5] == '2')
	type = GW5912;
	else if (info->model[4] == '1' && info->model[5] == '3')
	type = GW5913;
	break;
	default:
	printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
	print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
	sizeof(*info));
	break;
	}
	return type;
	}

	/* list of config bits that the bootloader will remove from dtb if not set */
	struct ventana_eeprom_config econfig[] = {
	{ "eth0", "ethernet0", EECONFIG_ETH0 },
	{ "usb0", NULL, EECONFIG_USB0 },
	{ "usb1", NULL, EECONFIG_USB1 },
	{ "mmc0", NULL, EECONFIG_SD0 },
	{ "mmc1", NULL, EECONFIG_SD1 },
	{ "mmc2", NULL, EECONFIG_SD2 },
	{ "mmc3", NULL, EECONFIG_SD3 },
	{ /* Sentinel */ }
	};

	#if defined(CONFIG_CMD_EECONFIG) && !defined(CONFIG_XPL_BUILD)
	static struct ventana_eeprom_config get_config(const char name)
	{
	struct ventana_eeprom_config *cfg = econfig;

	while (cfg->name) {
	if (0 == strcmp(name, cfg->name))
	return cfg;
	cfg++;
	}
	return NULL;
	}

	static u8 econfig_bytes[sizeof(ventana_info.config)];
	static int econfig_init = -1;

	static int do_econfig(struct cmd_tbl *cmdtp, int flag, int argc,
	char *const argv[])
	{
	struct ventana_eeprom_config *cfg;
	struct ventana_board_info *info = &ventana_info;
	int i;

	if (argc < 2)
	return CMD_RET_USAGE;

	/* initialize */
	if (econfig_init != 1) {
	memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
	econfig_init = 1;
	}

	/* list configs */
	if ((strncmp(argv[1], "list", 4) == 0)) {
	cfg = econfig;
	while (cfg->name) {
	printf("%s: %d\n", cfg->name,
	test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
	cfg++;
	}
	}

	/* save */
	else if ((strncmp(argv[1], "save", 4) == 0)) {
	unsigned char buf = (unsigned char )info;
	int chksum;

	/* calculate new checksum */
	memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
	chksum += buf[i];
	debug("old chksum:0x%04x\n",
	(info->chksum[0] << 8) \| info->chksum[1]);
	debug("new chksum:0x%04x\n", chksum);
	info->chksum[0] = chksum >> 8;
	info->chksum[1] = chksum & 0xff;

	/* write new config data */
	if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->config - (u8 *)info,
	1, econfig_bytes, sizeof(econfig_bytes))) {
	printf("EEPROM: Failed updating config\n");
	return CMD_RET_FAILURE;
	}

	/* write new config data */
	if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->chksum - (u8 *)info,
	1, info->chksum, 2)) {
	printf("EEPROM: Failed updating checksum\n");
	return CMD_RET_FAILURE;
	}

	printf("Config saved to EEPROM\n");
	}

	/* get config */
	else if (argc == 2) {
	cfg = get_config(argv[1]);
	if (cfg) {
	printf("%s: %d\n", cfg->name,
	test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
	} else {
	printf("invalid config: %s\n", argv[1]);
	return CMD_RET_FAILURE;
	}
	}

	/* set config */
	else if (argc == 3) {
	cfg = get_config(argv[1]);
	if (cfg) {
	if (simple_strtol(argv[2], NULL, 10)) {
	test_and_set_bit(cfg->bit, econfig_bytes);
	printf("Enabled %s\n", cfg->name);
	} else {
	test_and_clear_bit(cfg->bit, econfig_bytes);
	printf("Disabled %s\n", cfg->name);
	}
	} else {
	printf("invalid config: %s\n", argv[1]);
	return CMD_RET_FAILURE;
	}
	}

	else
	return CMD_RET_USAGE;

	return CMD_RET_SUCCESS;
	}

	U_BOOT_CMD(
	econfig, 3, 0, do_econfig,
	"EEPROM configuration",
	"list - list config\n"
	"save - save config to EEPROM\n"
	"<name> - get config 'name'\n"
	"<name> [0\|1] - set config 'name' to value\n"
	);

	#endif /* CONFIG_CMD_EECONFIG */