- nand_probe(CFG_NAND_BASE);
- if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
- print_size(nand_dev_desc[0].totlen, "\n");
+ if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
+ return -1;
+ } else {
+ switch (state) {
+ case 1:
+ /* Enable write access, clear bit GPIO0. */
+ out_be32((void*)GPIO0_OR,
+ in_be32((void*)GPIO0_OR) & ~CONFIG_SYS_EEPROM_WP);
+ state = 0;
+ break;
+ case 0:
+ /* Disable write access, set bit GPIO0. */
+ out_be32((void*)GPIO0_OR,
+ in_be32((void*)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);
+ state = 0;
+ break;
+ default:
+ /* Read current status back. */
+ state = (0 == (in_be32((void*)GPIO0_OR) &
+ CONFIG_SYS_EEPROM_WP));
+ break;
+ }