[flashrom] Macronix MX23L6454 probe/read success (buspirate_spi)

[Steven Honeyman]

On 8 March 2015 at 00:24, Stefan Tauner
<stefan.tauner at alumni.tuwien.ac.at> wrote:
> On Sat, 7 Mar 2015 02:24:49 +0000
> Steven Honeyman <stevenhoneyman at gmail.com> wrote:
>
>> Probe and Read both worked, no problems
>>
>> Log:
>>
>> […]
>> Probing for Intel 25F640S33T8, 8192 kB: probe_spi_rdid_generic: id1
>> 0xc2, id2 0x517
>> Probing for Macronix MX23L1654, 2048 kB: probe_spi_rdid_generic: id1
>> 0xc2, id2 0x517
>> Probing for Macronix MX23L3254, 4096 kB: probe_spi_rdid_generic: id1
>> 0xc2, id2 0x517
>> Probing for Macronix MX23L6454, 8192 kB: probe_spi_rdid_generic: id1
>> 0xc2, id2 0x517
>> Found Macronix flash chip "MX23L6454" (8192 kB, SPI) on buspirate_spi.
>> Probing for Macronix MX23L12854, 16384 kB: probe_spi_rdid_generic: id1
>> 0xc2, id2 0x517
>> Probing for Macronix MX25L512(E)/MX25V512(C), 64 kB:
>> probe_spi_rdid_generic: id1 0xc2, id2 0x517
>> Probing for Macronix MX25L1005(C)/MX25L1006E, 128 kB:
>> probe_spi_rdid_generic: id1 0xc2, id2 0x517
>> Probing for Macronix MX25L2005(C)/MX25L2006E, 256 kB:
>> probe_spi_rdid_generic: id1 0xc2, id2 0x517
>> Probing for Macronix MX25L4005(A/C)/MX25L4006E, 512 kB: RDID byte 0
>> parity violation. probe_spi_rdid_generic: id1 0x00, id2 0x00
>> Probing for Macronix MX25L8005/MX25L8006E/MX25L8008E/MX25V8005, 1024
>> kB: RDID byte 0 parity violation. probe_spi_rdid_generic: id1 0x00,
>> id2 0x00
>> Probing for Macronix MX25L1605, 2048 kB: RDID byte 0 parity violation.
>> probe_spi_rdid_generic: id1 0x00, id2 0x00
>> […]
>
> Hello Steven,
>
> thanks for your report!
> The log looks quite suspicious in terms of reproducibility. The excerpt
> above shows that the chip replied two different things when queried with
> probe_spi_rdid_generic: all zeros and the correct ID (0xc2517)
> respectively. This is usually an indication for wiring problems. If it
> was that inconsistent all the time you would probably not be able to
> read a good image. Did you read the chip multiple times and compared
> the results?

Hmmm, I didn't (because it was so slow), but I can do if you think
there were issues.

I only had a quick look through the image but it looked to be what I
was expecting.
I'll dump the image using some other software/hardware and make sure
that matches too.

Unfortunately I think I've only got the buspirate as
flashrom-supported hardware. I can't guarantee any FTDI chips I have
are legit (ebay...)


Thanks,
Steven