mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 22:39:08 +09:00
30 lines
965 B
Plaintext
30 lines
965 B
Plaintext
![]() |
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
|