wrong cfi flash device id
plagnioj at jcrosoft.com
Tue Nov 20 03:07:26 EST 2012
On 11:54 Tue 20 Nov , zzs wrote:
> My board is very similar to at91rm9200ek but using
> a 8MB cfi flash AT49BV642D.
> When barebox started, the flash info as blow:
> # devinfo cfi_flash0
> CFI conformant FLASH (16 x 16) Size: 8 MB in 135 Sectors
> AMD Standard command set, Manufacturer ID: 0x1F, Device ID: 0xD6
> Erase timeout: 8192 ms, write timeout: 256 us
> Buffer write timeout: 64 us, buffer size: 4 bytes
> Sector Start Addresses:
> 10000000 10010000 10020000 10030000 10040000
> 10050000 10060000 10070000 10080000 10090000
> 100A0000 100B0000 100C0000 100D0000 100E0000
> Barebox said the device id is 0xD6, But it should be 0x1D6.
> Because of this wrong ID, In function drivers/nor/cfi_flash_amd.c:flash_fixup_atmel()
> the erase region were reversed.
> So I can't erase the first few sectors
> I think it should use read8 or read16 according the portwidth like
> u-boot does.
I check the kernel we need to read the id according the bus width
btw please use a real name zzs is either an english name or a chinese name
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