Re: [flashrom] Error reading Winbond W25x16 on Intel DX48BT2

[Finnbarr Murphy]

Hi Carl-Daniel,

Thanks for the fast feedback.  This BIOS has a UEFI boot option which
isupports EFI booting an OS.  Got it to work for a while and then
somehow it managed to hose itself by adding one too many boot options.
I suspect a buggy implementation of an EFI boot manager but Intel will
not provide any support because (1) I was using Linux and (2) it is
a desktop motherboard.  I wanted to clean out the EFI boot options.

Guess I will just have to demand a replacement motherboard under 
warranty.

Regards
- Finnbarr
> Date: Wed, 3 Feb 2010 17:40:07 +0100
> From: [e-mail]
> To: [e-mail]
> CC: [e-mail]
> Subject: Re: [flashrom] Error reading Winbond W25x16 on Intel DX48BT2
>
> Hi Finnbarr,
>
> On 03.02.2010 17:12, Finnbarr Murphy wrote:
> > Here is a failure report against an Intel DX48BT2 motherboard which
> > uses a ICH9R and a Winbond W25x16 containing the BIOS.
> >
> > Command I executed was:
> >
> > ./flashrom -c W25x16 -rV out.bin
> >
> > flashrom v0.9.1-r889
> > No coreboot table found.
> > DMI string 0: "                                "
> > DMI string 1: "                                "
> > DMI string 2: "                        "
> > DMI string 3: "Intel Corporation"
> > DMI string 4: "DX48BT2"
> > DMI string 5: "AAE26191-205"
>
> Ah, a mainboard manufactured by Intel.
> > Found chipset "Intel ICH9R", enabling flash write...
> > [...]
> > 0x98: 0x2002009f (OPMENU)
> > 0x9C: 0x00000000 (OPMENU+4)
> > [...]
>
> Heh. The BIOS vendor decided to allow writing to the chip (0x02),
> erasing (0x20), and identification (0x9f). Reading (0x03) is not allowed.
> > WARNING: SPI Configuration Lockdown activated.
>
> And the lockdown means that flashrom can't do anything against it.
> > Generating OPCODES... done
> > SPI Read Configuration: prefetching enabled, caching enabled, FAILED!
> > This chipset supports the following protocols: FWH,SPI.
> > Calibrating delay loop... 805M loops per second, 100 myus = 199 us. OK.
> > Probing for Winbond W25x16, 2048 KB: RDID returned 0xef 0x30 0x15. probe_spi_rdid_generic: id1 0xef, id2 0x3015
> > Invalid OPCODE 0x05
> > Chip status register is 0a
> > Found chip "Winbond W25x16" (2048 KB, SPI) at physical address 0xffe00000.
> > Reading flash... Invalid OPCODE 0x03
> >
> > Any idea what is going on?  According to the W25x16 documentation opcodes
> > 0x03 and 0x05 are supported.
>
> Yes, the problem is that Intel decided to disallow any read opcodes in
> the chipset configuration. Sorry, but we can't do anything to circumvent
> this except for messing with the flash descriptor in a rather dangerous way.
> A BIOS/EFI update/downgrade might help.
>
> Regards,
> Carl-Daniel