[1084] in linux-scsi channel archive
NCR53C8XX patch: 2.0.27 + 53C875 + clock doubler + SDMS4.0
daemon@ATHENA.MIT.EDU (Gerard Roudier)
Sun Dec 8 16:23:45 1996
Date: Sun, 8 Dec 1996 23:19:08 +0000 (GMT)
From: Gerard Roudier <groudier@club-internet.fr>
To: linux-scsi@vger.rutgers.edu, ncr53c810@colorado.edu
cc: Linus Torvalds <Linus.Torvalds@cs.helsinki.fi>
Seems that SDMS BIOS 4.0 enables clock doubler for NCR53C875 rev. >= 2.
In this situation, the (old) ncr53c8xx driver 1.12c of the stable linux
tree does not detect correctly the scsi clock frequency.
This patch must be applied to linux-2.0.27 and so incorporated in 2.0.28
if it'll be ever released.
Current linux-2.1.X uses ncr53c8xx-1.14c which detects correctly the scsi
clock. So, do not try to apply this patch if you are using linux-2.1.X,
or if you are using ncr53c8xx-1.14c under linux-2.0.X or linux-1.2.13.
My current scsi board is a Promise Premier SCSI ULTRA with ncr53c875 rev 3,
clock doubler and SDMS 4.0. :)
I have added 2 other trivial fixes to this patch.
Gerard.
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