[flashrom] AT25SF041 chip support

[adam]

Hi again Nico,

I just realized that there is more recent version on the git repo. I was 
using the one from downloaded tar archive before. Now it looks to work 
fine with AT25SF041.

Thank you,
Adam

On 12/4/18 11:36 PM, adam wrote:
>
> Hello Nico,
>
> Thank you for the reply.
>
> I have looked at the SPI communication using logic analyzer and it 
> doesn't look bad. I have slower SPI clock by adding divisor=6 and even 
> went down to 12 and it didn't helped.
> It looks like on the capture below.
>
> I have checked what verbose output will tell me and there is valid 
> JEDEC read from the chip next to the probes but it looks like there is 
> no probe for the AT25SF041.
>
> Here is the grep for AT25 from the verbose output.
>
> ./flashrom -p ft2232_spi:type=4232H,divisor=12,port=A -V | grep AT25
> Probing for Atmel AT25DF021, 256 kB: probe_spi_rdid_generic: id1 0x1f, 
> id2 0x8401
> Probing for Atmel AT25DF041A, 512 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF081, 1024 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF081A, 1024 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF161, 2048 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF321, 4096 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF321A, 4096 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DF641(A), 8192 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DL081, 1024 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DL161, 2048 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25DQ161, 2048 kB: probe_spi_rdid_generic: id1 
> 0x1f, id2 0x8401
> Probing for Atmel AT25F512, 64 kB: probe_spi_at25f: id1 0xff, id2 0xff
> Probing for Atmel AT25F512A, 64 kB: probe_spi_at25f: id1 0xff, id2 0xff
> Probing for Atmel AT25F512B, 64 kB: probe_spi_rdid_generic: id1 0x1f, 
> id2 0x8401
> Probing for Atmel AT25F1024(A), 128 kB: probe_spi_at25f: id1 0xff, id2 
> 0xff
> Probing for Atmel AT25F2048, 256 kB: probe_spi_at25f: id1 0xff, id2 0xff
> Probing for Atmel AT25F4096, 512 kB: probe_spi_at25f: id1 0xff, id2 0xff
> Probing for Atmel AT25FS010, 128 kB: probe_spi_rdid_generic: id1 0x1f, 
> id2 0x8401
> Probing for Atmel AT25FS040, 512 kB: probe_spi_rdid_generic: id1 0x1f, 
> id2 0x8401
>
> I'm also attaching the logfile.
>
> My hardware is basically a clone of the following spectral sensor 
> board from the Sparkfun: 
> https://cdn.sparkfun.com/assets/a/e/7/7/a/Qwiic_Spectral_Sensor-AS726x_v10.pdf
>
> Best regards,
> Adam
>
> On 12/4/18 9:07 PM, Nico Huber wrote:
>> Hello Adam,
>>
>> On 04.12.18 08:26, adam wrote:
>>> Hello,
>>>
>>> I'm trying to manage AT25SF041 using FT4232 MiniModule programmer. I'm
>>> using flashrom v1.0 on Linux 4.15.0-42-generic (x86_64) compiled from
>>> sources. Trying to erase chip at first and get this output:
>>>
>>> ./flashrom -p ft2232_spi:type=4232H,port=A -Ef
>> forcing erase is futile, flashrom shouldn't ever do that.
>>
>>> Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
>>> Found Atmel flash chip "unknown Atmel SPI chip" (0 kB, SPI) on ft2232_spi.
>> This is likely a physical issue with your hardware setup. SPI is not
>> a bus where you can just plug things together like USB for instance.
>> Signal integrity is a delicate thing with SPI.
>>
>> An easy workaround is often to lower the transfer speed. For your
>> programmer there's a divisor option. IIRC add `,divisor=6` to the
>> programmer argument (valid divisors are equal numbers >= 2, the base
>> frequency is 60MHz so 6 means 10MHz SPI clock).
>>
>> If that doesn't help, please attach a log file (add `-o logfile.txt`
>> to your flashrom command line) to your next email. And tell us more
>> about your hardware setup (e.g. how the flash chip is connected, what
>> else is connected, is the chip on some kind of mainboard etc.).
>>
>> Hope that helps,
>> Nico
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