[7560] in linux-scsi channel archive
NCR53C400A for ScanJet - minor changes needed
daemon@ATHENA.MIT.EDU (Pavel Roskin)
Wed Nov 17 23:29:34 1999
Date: Wed, 17 Nov 1999 23:25:34 -0500 (EST)
From: Pavel Roskin <pavel_roskin@geocities.com>
To: K.Lentin@cs.monash.edu.au, linux-scsi@vger.rutgers.edu
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Hello!
I've got a scanner HP ScanJet 3p with a SCSI interface card. The interface
card has a chip marked as NCR53C400A and other smaller chips. It also has
a jumper without any information. The documantation that comes with the
scanner mentiones 4 jumpers, so presumably it's a slightly modified
version of the interface card.
Linux-2.2.13 cannot find the card. But if I boot it with loadlin from DOS
with the DOS driver loaded, it does find the card! I can even scan images
with SANE!
The parameters are:
modprobe g_NCR5380 ncr_53c400a=1 ncr_addr=0x280
My investigation shows that the DOS driver sends different values to the
ports 0x379 and 0x779
The attached patch makes Linux see my scanner. However, it is _not_ meant
to be applied.
If I understand correctly, the port 0x379 (write only) has to do with
IsaPNP. Although the scanner card is not a PnP card, it may have an ID
for configuring it through the port 0x379. That ID is different in my
case.
Possible solutions:
1) Specify the ID as a parameter. Not nice, but flexible.
2) Add a parameter ncr_brand. If it is "HP", use the values from my patch,
otherwise use the existing values.
I know that the last 2.3.x kernel has the same driver for NCR53C400A
Pavel Roskin
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