C++ (Cpp) eeprom_bus_read Examples

Example #1

File: env_eeprom.c Project: Geeteshchintu/uboot-hack

void env_relocate_spec (void)
{
	unsigned int off = CONFIG_ENV_OFFSET;
#ifdef CONFIG_ENV_OFFSET_REDUND
	if (gd->env_valid == 2)
		off = CONFIG_ENV_OFFSET_REDUND;
#endif
	eeprom_bus_read (CONFIG_SYS_DEF_EEPROM_ADDR,
		     off,
		     (uchar*)env_ptr,
		     CONFIG_ENV_SIZE);
}

Example #2

File: env_eeprom.c Project: Brian1013/u-boot

void env_relocate_spec(void)
{
	char buf[CONFIG_ENV_SIZE];
	unsigned int off = CONFIG_ENV_OFFSET;

#ifdef CONFIG_ENV_OFFSET_REDUND
	if (gd->env_valid == 2)
		off = CONFIG_ENV_OFFSET_REDUND;
#endif
	eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
			off, (uchar *)buf, CONFIG_ENV_SIZE);

	env_import(buf, 1);
}

Example #3

File: env_eeprom.c Project: Brian1013/u-boot

uchar env_get_char_spec(int index)
{
	uchar c;
	unsigned int off = CONFIG_ENV_OFFSET;

#ifdef CONFIG_ENV_OFFSET_REDUND
	if (gd->env_valid == 2)
		off = CONFIG_ENV_OFFSET_REDUND;
#endif
	eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
			off + index + offsetof(env_t, data), &c, 1);

	return c;
}

Example #4

File: env_eeprom.c Project: Brian1013/u-boot

int env_init(void)
{
	ulong len, crc[2], crc_tmp;
	unsigned int off, off_env[2];
	uchar buf[64], flags[2];
	int i, crc_ok[2] = {0, 0};

	eeprom_init();	/* prepare for EEPROM read/write */

	off_env[0] = CONFIG_ENV_OFFSET;
	off_env[1] = CONFIG_ENV_OFFSET_REDUND;

	for (i = 0; i < 2; i++) {
		/* read CRC */
		eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
				off_env[i] + offsetof(env_t, crc),
				(uchar *)&crc[i], sizeof(ulong));
		/* read FLAGS */
		eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR,
				off_env[i] + offsetof(env_t, flags),
				(uchar *)&flags[i], sizeof(uchar));

		crc_tmp = 0;
		len = ENV_SIZE;
		off = off_env[i] + offsetof(env_t, data);
		while (len > 0) {
			int n = (len > sizeof(buf)) ? sizeof(buf) : len;

			eeprom_bus_read(CONFIG_SYS_DEF_EEPROM_ADDR, off,
					buf, n);

			crc_tmp = crc32(crc_tmp, buf, n);
			len -= n;
			off += n;
		}

		if (crc_tmp == crc[i])
			crc_ok[i] = 1;
	}

	if (!crc_ok[0] && !crc_ok[1]) {
		gd->env_addr	= 0;
		gd->env_valid	= 0;

		return 0;
	} else if (crc_ok[0] && !crc_ok[1]) {
		gd->env_valid = 1;
	} else if (!crc_ok[0] && crc_ok[1]) {
		gd->env_valid = 2;
	} else {
		/* both ok - check serial */
		if (flags[0] == ACTIVE_FLAG && flags[1] == OBSOLETE_FLAG)
			gd->env_valid = 1;
		else if (flags[0] == OBSOLETE_FLAG && flags[1] == ACTIVE_FLAG)
			gd->env_valid = 2;
		else if (flags[0] == 0xFF && flags[1] == 0)
			gd->env_valid = 2;
		else if (flags[1] == 0xFF && flags[0] == 0)
			gd->env_valid = 1;
		else /* flags are equal - almost impossible */
			gd->env_valid = 1;
	}

	if (gd->env_valid == 2)
		gd->env_addr = off_env[1] + offsetof(env_t, data);
	else if (gd->env_valid == 1)
		gd->env_addr = off_env[0] + offsetof(env_t, data);

	return 0;
}