Hi,
We have an flash (CFI) connected through an 8 bit bus.
What happens is that the call to cmdset_amd_init() is called with portwidth set to 2 resulting in flash_info_t::manufacturer_id equal to 0 and also flash_info_t::device_id is set to 0. This is because the commandpatterns are wrong for 8 bit devices.
Later on in the flash_get_size() function the portwidth is set to 1 as it should be (around line 1807).
After that the cmdset_amd_init() can be called and the manufacturer_id and device_id are set correctly....
Maybe this does not make sense but the patch below allows me to read the manufacturer_id and device_id correctly. If this is applicable in general for all boards I have no idea.
The patch is against u-boot-1.3.2.
rg kd
Index: drivers/mtd/cfi_flash.c =================================================================== --- drivers/mtd/cfi_flash.c (revision 283) +++ drivers/mtd/cfi_flash.c (working copy) @@ -102,9 +102,9 @@ #define AMD_STATUS_ERROR 0x20
#define FLASH_OFFSET_MANUFACTURER_ID 0x00 -#define FLASH_OFFSET_DEVICE_ID 0x01 -#define FLASH_OFFSET_DEVICE_ID2 0x0E -#define FLASH_OFFSET_DEVICE_ID3 0x0F +#define FLASH_OFFSET_DEVICE_ID ((info->portwidth == FLASH_CFI_8BIT) ? 0x02 : 0x01) +#define FLASH_OFFSET_DEVICE_ID2 ((info->portwidth == FLASH_CFI_8BIT) ? 0x1C : 0x0E) +#define FLASH_OFFSET_DEVICE_ID3 ((info->portwidth == FLASH_CFI_8BIT) ? 0x1E : 0x0F) #define FLASH_OFFSET_CFI 0x55 #define FLASH_OFFSET_CFI_ALT 0x555 #define FLASH_OFFSET_CFI_RESP 0x10 @@ -1695,11 +1695,8 @@ switch (info->vendor) { case CFI_CMDSET_INTEL_STANDARD: case CFI_CMDSET_INTEL_EXTENDED: - cmdset_intel_init(info, &qry); - break; case CFI_CMDSET_AMD_STANDARD: case CFI_CMDSET_AMD_EXTENDED: - cmdset_amd_init(info, &qry); break; default: printf("CFI: Unknown command set 0x%x\n", @@ -1811,6 +1808,17 @@ } }
+ switch (info->vendor) { + case CFI_CMDSET_INTEL_STANDARD: + case CFI_CMDSET_INTEL_EXTENDED: + cmdset_intel_init(info, &qry); + break; + case CFI_CMDSET_AMD_STANDARD: + case CFI_CMDSET_AMD_EXTENDED: + cmdset_amd_init(info, &qry); + break; + } + flash_write_cmd (info, 0, 0, info->cmd_reset); return (info->size); }