Date: Wed, 10 Jun 1998 18:56:16 +0200 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: "Daniel M. Eischen" <deischen@iworks.InterWorks.org> Cc: owner-freebsd-scsi@FreeBSD.ORG, borjam@we.lc.ehu.es, freebsd-scsi@FreeBSD.ORG, gibbs@plutotech.com, gpalmer@FreeBSD.ORG Subject: Re: AHC: "cheksum error" reading SEEPROM with Iwill PIILS mb Message-ID: <357EBAB0.9867A333@we.lc.ehu.es> References: <199806021650.LAA15386@iworks.InterWorks.org>
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Daniel M. Eischen wrote:
>
> > > 808e 808e 808e 808e 862d bfc0 bfff bfff bfff bfff bfff bfff bfff
> > > bfff bfff bfff bfff bfff bfff bfff bfff bfff bfff bfff bfff bfff
> > > bfff bfff bfff bfff bfff
> > >
> > >Strange, isn't it?
> >
> > I would have expected either valid SEEPROM contents or all ff's indicating
> > that the SEEPROM is not present. Did you find a 93cx6 chip on the MB?
>
> It might be a 93C56 or 93C66 (64 words) with the checksum at the end.
>
> You might want to change the driver so that if the C46 seeprom read
> fails, it tries to read the C56/C66 seeprom. Instead of basing the
> SEEPROM type on the controller type...
>
I asked Iwill about the SEEPROM type on the PIILS motherboard. They
answered that the PIILS has a serial EEPROM, and that it's a 93c56.
As Daniel Eischen suggested, I "forced" this SEEPROM type in
pci/aic7870.c and... bingo!!! Now the SEEPROM is correctly read:
ahc0 <Adaptec aic7880 Ultra SCSI host adapter> rev 0 int a irq 9 on pci0:20:0
mapreg[10] type=1 addr=00006400 size=0100.
mapreg[14] type=0 addr=f0000000 size=1000.
reg20: virtual=0xf50e6000 physical=0xf0000000 size=0x1000
ahc0: Reading SEEPROM...done.
low byte termination enabled, high byte termination enabled
ahc0: aic7880 Wide Channel, SCSI Id=7, 16/255 SCBs
ahc0: Resetting Channel A
ahc0: Downloading Sequencer Program...ahc0: 416 instructions downloaded
Done
ahc0: Probing channel A
ahc0 waiting for scsi devices to settle
ahc0: target 0 using 16Bit transfers
ahc0: target 0 synchronous at 20.0MHz, offset = 0x8
ahc0: target 0 Tagged Queuing Device
It works!! And the Ultra SCSI speed is now enabled. Thank you very much!!!
Now, should I open a PR about this problem? I think that pci/aic7870.c
could be patched. I don't know if CAM has this problem with the
SEEPROM type.
-- JM
-----------------------------------------------------------------------
Jose M. Alcaide | mailto:jose@we.lc.ehu.es
Universidad del Pais Vasco | http://www.we.lc.ehu.es/~jose
Dpto. de Electricidad y Electronica |
Facultad de Ciencias - Campus de Lejona | Tel.: +34-944647700 x2624
48940 Lejona (Vizcaya) - SPAIN | Fax: +34-944858139
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