diff options
Diffstat (limited to 'drivers/mtd/cfi_flash.c')
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index 3ca73e3ca..6eea49a11 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -106,6 +106,8 @@ #define ATM_CMD_SOFTLOCK_START 0x80 #define ATM_CMD_LOCK_SECT 0x40 +#define FLASH_CONTINUATION_CODE 0x7F + #define FLASH_OFFSET_MANUFACTURER_ID 0x00 #define FLASH_OFFSET_DEVICE_ID 0x01 #define FLASH_OFFSET_DEVICE_ID2 0x0E @@ -1541,13 +1543,22 @@ static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry) static void cmdset_amd_read_jedec_ids(flash_info_t *info) { + ushort bankId = 0; + uchar manuId; + flash_write_cmd(info, 0, 0, AMD_CMD_RESET); flash_unlock_seq(info, 0); flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID); udelay(1000); /* some flash are slow to respond */ - info->manufacturer_id = flash_read_uchar (info, - FLASH_OFFSET_MANUFACTURER_ID); + manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID); + /* JEDEC JEP106Z specifies ID codes up to bank 7 */ + while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) { + bankId += 0x100; + manuId = flash_read_uchar (info, + bankId | FLASH_OFFSET_MANUFACTURER_ID); + } + info->manufacturer_id = manuId; switch (info->chipwidth){ case FLASH_CFI_8BIT: |