| The common CFI driver provides this weak default implementation for |
| flash_cmd_reset(): |
| |
| void __flash_cmd_reset(flash_info_t *info) |
| { |
| /* |
| * We do not yet know what kind of commandset to use, so we issue |
| * the reset command in both Intel and AMD variants, in the hope |
| * that AMD flash roms ignore the Intel command. |
| */ |
| flash_write_cmd(info, 0, 0, AMD_CMD_RESET); |
| flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); |
| } |
| void flash_cmd_reset(flash_info_t *info) |
| __attribute__((weak,alias("__flash_cmd_reset"))); |
| |
| |
| Some flash chips seems to have trouble with this reset sequence. In this case |
| the board specific code can override this weak default version with a board |
| specific function. For example the digsy_mtc board equipped with the M29W128GH |
| from Numonyx needs this version to function properly: |
| |
| void flash_cmd_reset(flash_info_t *info) |
| { |
| flash_write_cmd(info, 0, 0, AMD_CMD_RESET); |
| } |
| |
| see also: |
| http://www.mail-archive.com/u-boot@lists.denx.de/msg24368.html |
