[sane-devel] backends-1.0.14 scsi epson

[Klaus Dittrich]

Klaus Dittrich wrote:

> abel deuring wrote:
>
>> sorry Klaus, I should have had a closer look into your other mail 
>> containing the debug output.
>>
>> abel deuring wrote:
>>
>>> Klaus Dittrich wrote:
>>
>>
>> [...]
>>
>>>> Starting with backend-1.0.13 the sanei_scsi layer has changed
>>>> and therefore I assume a bug in the scsi status handling, because
>>>> expect_ack() has not changed since sane-backends-1.0.12.
>>>>
>>>> Maybe one of the sanei_scsi developers can help here ?
>>>
>>>
>>> T
>>>
>>> As far as I can see, the only changes in sanei_scsi.c after the 
>>> release of sane-backends-1.0.12 affecting Linux are indentation 
>>> fixes and similar "formal" modifications. But the "real" code is the 
>>> same. So I don't think that your problems are related to 
>>> sanei_scsi.c. Anyway, could you send me the log output from trying a 
>>> scan with the backend version 1.0.12 and a newer version,  while 
>>> SANEI_DEBUG_EPSON and SANE_DEBUG_SANEI_SCSI are set to 255?
>>
>>
>>
>> the last lines from your debug data:
>>
>> dev_max(currently)=6 max_active_device=4 (origin 1)
>>  def_reserved_size=32768
>>  >>> device=sg3 scsi2 chan=0 id=5 lun=0   em=0 sg_tablesize=96 excl=1
>>    FD(1): timeout=120000ms bufflen=131072 (res)sgat=4 low_dma=0
>>    cmd_q=1 f_packid=0 k_orphan=0 closed=0
>>      rb>> rcv: id=28 blen=1 dur=3ms sgat=0 op=0x08
>> [sanei_scsi] sanei_scsi_req_wait: read 64 bytes
>> [sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Success
>> [sanei_scsi] sense buffer: f0 00 05 00 00 00 00 00 00 00 00 00 00 00 
>> 00 00
>> [sanei_scsi] target status: 02 host status: 0000 driver status: 0008
>> [sanei_scsi] sanei_scsi_req_wait: SG driver returned resid 1
>> [sanei_scsi]                      NOTE: This value may be bogus
>>
>> That's the relevant part of the debug data you've sent: It simply 
>> tells us that the scanner returned the status CHECK CONDITION for the 
>> last command; The sense data means "illegal request". This generally 
>> means that the SCSI command sent to the device contained some error. 
>> Within sanei_scsi.c, that's "perfectly normal": This library does not 
>> issue any SCSI commands by itself during a scan, it only "forwards" 
>> commands issued by a backend to the kernel. So I assume that some 
>> change in the Epson backend caused the error.
>>
>> Abel
>>
>>
> Thanks for your answer. I will try some more experiments. May be there 
> is more
> code sent to the scanner than necessary in the case of ADF usage.
> With USB and linux-2.6.6-rc3 I get this ..
>
> kernel: usbfs: USBDEVFS_BULK failed dev 11 ep 0x81 len 1 ret -110
>
> error each time I use the ADF. Using flatbed works.
>
> -- 
> Klaus

Seems feed() in epson.c is not needed at all.
I made it return SANE_STATUS_GOOD immediately and ADF scanning still works.
Karl Heinz it seems the LOAD PAPER (0x19) from EPSON's 
12_3065_esci_revl.pdf
has other purposes.   Do other scanners with ADF need this?

--
Klaus