[Linux-parport] stand-alone ppSCSI driver suite

[J Fairbairn]

On 2005-10-16 at 17:22+0200 Jochen Eisinger wrote:
> Hi,
> 
> I've finally put together a Makefile that allows you to compile the
> ppSCSI driver suite without patching your kernel.

Excellent! This will save me a great deal of trouble. However...

> If you have any problems with the drivers, please let me know, so I can
> try to fix it.

With Kernel 2.6.13-1.1526_FC4 it seems to take a long time
for the module to load. With 2.6.12-1.1456_FC4 it took maybe
a minute or two, which was longer than with previous
versions of the module, but with the 2.6.13 it seems to be
going for a record: I got bored and went away, but my prompt
records the time:

      pictogramme:~/
   12:05:57$ sudo modprobe epst
      pictogramme:~/
   12:56:24$

and yes, I did press return before running modprobe, so it
really did take fifty minutes!

   cat /proc/sys/dev/parport/parport0/modes
   PCSPP,TRISTATE,EPP

The scanner is an HP Scanjet 5100C, the log reports:

   Oct 20 12:06:04 pictogramme kernel: pnp: Device 00:08 activated.
   Oct 20 12:06:04 pictogramme kernel: parport: PnPBIOS parport detected.
   Oct 20 12:06:04 pictogramme kernel: parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
   Oct 20 12:06:04 pictogramme kernel: ppSCSI 0.92 (0.92) installed
[...]
   Oct 20 12:56:23 pictogramme kernel: epst.0: epst 0.92 (0.92), Shuttle EPST at 0x378 mode 2 (PS/2) dly 1 nice 0 sg 16
   Oct 20 12:56:23 pictogramme kernel: scsi3 : epst
   Oct 20 12:56:23 pictogramme kernel:   Vendor: HP        Model: C5190A            Rev: 3740
   Oct 20 12:56:23 pictogramme kernel:   Type:   Processor                          ANSI SCSI revision: 02
   Oct 20 12:56:23 pictogramme scsi.agent[6437]: processor at /devices/platform/host3/target3:0:0/3:0:0:0
   Oct 20 12:56:23 pictogramme kernel: Attached scsi generic sg0 at scsi3, channel 0, id 0, lun 0,  type 3

A gap of about fifty minutes between the "ppSCSI
... installed" message and the epst message seems fairly
repeatable (not, obviously, that I've tried it many times).

Once epst gets going it seems to work fine.

Do you have any suggestions?


-- 
Jón Fairbairn                              Jon.Fairbairn at cl.cam.ac.uk