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

[Stefan Tauner]

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?
-- 
Kind regards/Mit freundlichen Grüßen, Stefan Tauner