I'm trying to add support for AMD manufacturer ID to flash_real_protect().
The code currently does this:
case CFI_CMDSET_AMD_EXTENDED:
case CFI_CMDSET_AMD_STANDARD:
/* U-Boot only checks the first byte */
if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
...
}
break;
Unfortunately, I don't really understand CFI programming that well, but from
my research, it appears to me that AMD chips that implement the AMD standard
command set will work with this code:
case CFI_CMDSET_INTEL_PROG_REGIONS:
case CFI_CMDSET_INTEL_STANDARD:
case CFI_CMDSET_INTEL_EXTENDED:
flash_write_cmd (info, sector, 0,
FLASH_CMD_CLEAR_STATUS);
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
if (prot)
flash_write_cmd (info, sector, 0,
FLASH_CMD_PROTECT_SET);
else
flash_write_cmd (info, sector, 0,
FLASH_CMD_PROTECT_CLEAR);
break;
So I don't understand the need for Rafael Campos' patch:
http://lists.denx.de/pipermail/u-boot/2008-July/037419.html
It looks as if Rafael removed support for hardware flash protection from all
AMD standard/extended flash chips that are not made by Atmel.
--
Timur Tabi
Linux kernel developer at Freescale
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