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mtd, cfi: read AMD 3-byte (expanded) device ids on 16bit devices 

tested on the a4m072 board with a S29GL512P flash.

flinfo without this patch
Bank # 1: CFI conformant flash (16 x 16)  Size: 32 MB in 256 Sectors
  AMD Standard command set, Manufacturer ID: 0x01, Device ID: 0x227E
  Erase timeout: 16384 ms, write timeout: 2 ms
  Buffer write timeout: 5 ms, buffer size: 32 bytes
[...]

flinfo with this patch
Bank # 1: CFI conformant flash (16 x 16)  Size: 32 MB in 256 Sectors
  AMD Standard command set, Manufacturer ID: 0x01, Device ID: 0x227E2301
  Erase timeout: 16384 ms, write timeout: 2 ms
  Buffer write timeout: 5 ms, buffer size: 32 bytes
[...]

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Heiko Schocher 2011-04-11 14:16:19 +02:00 committed by Stefan Roese
parent 6a011ce851
commit 5b448adb4b
1 changed files with 11 additions and 2 deletions
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13
drivers/mtd/cfi_flash.c
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@ -1202,8 +1202,9 @@ void flash_print_info (flash_info_t * info)
info->manufacturer_id);
printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
info->device_id);
if (info->device_id == 0x7E) {
printf("%04X", info->device_id2);
if ((info->device_id & 0xff) == 0x7E) {
printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
info->device_id2);
}
printf ("\n Erase timeout: %ld ms, write timeout: %ld ms\n",
info->erase_blk_tout,
@ -1599,6 +1600,14 @@ static void cmdset_amd_read_jedec_ids(flash_info_t *info)
case FLASH_CFI_16BIT:
info->device_id = flash_read_word (info,
FLASH_OFFSET_DEVICE_ID);
if ((info->device_id & 0xff) == 0x7E) {
/* AMD 3-byte (expanded) device ids */
info->device_id2 = flash_read_uchar (info,
FLASH_OFFSET_DEVICE_ID2);
info->device_id2 <<= 8;
info->device_id2 |= flash_read_uchar (info,
FLASH_OFFSET_DEVICE_ID3);
}
break;
default:
break;