blob: d087ff0d63e6615e17c240f707861dfd3a324821 [file] [log] [blame]
Heiko Schocher466f0132011-01-13 08:25:00 +01001The common CFI driver provides this weak default implementation for
2flash_cmd_reset():
3
4void __flash_cmd_reset(flash_info_t *info)
5{
6 /*
7 * We do not yet know what kind of commandset to use, so we issue
8 * the reset command in both Intel and AMD variants, in the hope
9 * that AMD flash roms ignore the Intel command.
10 */
11 flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
12 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
13}
14void flash_cmd_reset(flash_info_t *info)
15 __attribute__((weak,alias("__flash_cmd_reset")));
16
17
18Some flash chips seems to have trouble with this reset sequence. In this case
19the board specific code can override this weak default version with a board
20specific function. For example the digsy_mtc board equipped with the M29W128GH
21from Numonyx needs this version to function properly:
22
23void flash_cmd_reset(flash_info_t *info)
24{
25 flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
26}
27
28see also:
29http://www.mail-archive.com/u-boot@lists.denx.de/msg24368.html