Date: Sat, 26 Aug 1995 08:47:50 -0500 From: Jon Loeliger <jdl@chrome.onramp.net> To: freebsd-current@freebsd.org, joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Subject: Re: That IDE CD ROM thang again... Message-ID: <199508261347.IAA25153@chrome.onramp.net> In-Reply-To: Your message of "Sat, 26 Aug 1995 08:13:27 %2B0200." <199508260613.IAA09444@uriah.heep.sax.de>
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Apparently, J Wunsch scribbled:
> As Jon Loeliger wrote:
> >
> > Well, I was never able to get my wdc1 controller recognized at all.
> > Don't know why yet.
>
> Since it's not a controller? Usually, a wdc "controller" will only be
> recognized if there's a disk attached, since it's actually the disk
> that is answering on the bus.
Well, yea, I think I understand that, but I used to have:
controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr
disk wd0 at wdc0 drive 0
#disk wd1 at wdc0 drive 1
controller wdc1 at isa? port "IO_WD2" bio irq 15 vector wdintr
#disk wd2 at wdc1 drive 0
#disk wd3 at wdc1 drive 1
options ATAPI #Enable ATAPI support for IDE bus
device wcd0 #IDE CD-ROM
My boot logs showed it trying the CDROM on wdc0 even before wdc1 was
reported NOT present.
Aug 24 09:08:07 zinc /kernel: wdc0 at 0x1f0-0x1f7 irq 14 on isa
Aug 24 09:08:07 zinc /kernel: wdc0: unit 0 (wd0): <WDC AC31000H>
Aug 24 09:08:07 zinc /kernel: wd0: 1033MB (2116800 sectors), 2100 cyls, 16 heads, 63 S/T, 512 B/S
Aug 24 09:08:07 zinc /kernel: atapi0.1 at 0x1f0: attach called
Aug 24 09:08:07 zinc /kernel: atapi.1 at 0x1f0: identify not ready, status=1<check>
Aug 24 09:08:08 zinc /kernel: wdc1 not found at 0x170
Steve Wallace and I mumbled about it like this:
Apparently, Steven Wallace scribbled:
>
> Umm, you only have ONE IDE hard disk and ONE IDE CDROM?
> I was under the impression you had two ide hard disks.
> So you have one on each controller, eh? That should be okay,
me: Well, I might have confused you some.... (Nah!) I actually
have occasion to use two drives on this machine, so the second
comes and goes as needed. It currently wasn't present, but
the kernel silently allowed for it and just didn't find it.
So, thinking that it might be confusing things, I did a round
where I removed the second disk entry from the kernel to more
accurately reflect the expected hardware.
> but I notieced your prob:
> wdc1 not found at 0x170
>
> It should still recognize the controller, even if it has probs
> on the atapi. Check your port and IRQ settings.
Will do. I know that I can use this full configuration under
lovely 'doze 95, so I'm pretty sure that the hardware itself
is all playing together nicely. I'm NOT sure that I've correctly
converted it to FreeBSD config lingo... The 'doze 95 poking
reveals this:
IDE controller (PCI) IRQ 14 0x1f0-1f7, 0x3f6-3f6
IDE controller standard IRQ 15 0x170-177, 0x376-376
I think I converted this to:
controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr
controller wdc1 at isa? port "IO_WD2" bio irq 15 vector wdintr
He then suggested the approach of making the CD ROM a slave drive,
which has worked and gotten me this far...
> I think it's in error to byte-shuffle only the ID string. Everything
> from the drive must be byte-swapped, including the ID word and all
> data.
Oh my! OK, I'll give this a hack attack and see what I get. Any chance
you can give me a one minute pointer to *where* that might take place?
Like, where the buffers coming back from the drive are filled? I see
the one in _probe() that's obtained with the insw(). Will they all
look like that?
> (Of course, you have to make a distinction whether to swap or
> not before.)
Yea, this is curious. I get the feeling that some people are able
to get the IDE CD drives to work and others aren't. Is there some
reasonable distinction separating the two camps? Do we need to start
a collection of working/not-working drives and form the basis of a
boot time lookup table (ick) to determine byte-swapping needs?
> Disclaimer: i don't own an ATAPI CD, and the only wdc-style drive
> i'm still operating sits in my notebook.
OK, so you're lucky. :-)
jdl
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