Date: Tue, 2 Dec 1997 12:13:54 -0600 (CST) From: "Daniel M. Eischen" <deischen@iworks.interworks.org> To: freebsd-hackers@freebsd.org, freebsd-mobile@freebsd.org Subject: Fix for slow reacting ATAPI CD-ROM Message-ID: <199712021813.MAA10260@iworks.InterWorks.org>
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Please forgive the cross-post, wasn't sure where this belongs.
I have a new ChemUSA Chembook and everything works fine
except for the CD-ROM drive, which times out waiting
for the command phase in atapi_wait_cmd(). I was able
to get it to work by increasing the wait count to 3000.
/* Wait for DRQ from 50 usec to 3 msec for slow devices */
int cnt = ata->intrcmd ? 10000 : ata->slow ? 3000 : 50;
int ireason = 0, phase = 0;
+ cnt = 3000;
+
/* Wait for command phase. */
for (; cnt>0; cnt-=10) {
ireason = inb (ata->port + AR_IREASON);
Obviously, this drive isn't detected as a slow device (I
can post the boot messages later if needed). What I wanted
to do was to add a config flag for setting this, but it doesn't
look like that is sent down to the atapi driver.
Question: Can we change atapi_attach() to accept a 4th argument
and use this to pass config flags from wdattach() in
wd.c? Is there another method I should be using to
handle atapi device quirks?
Thanks,
Dan Eischen
deischen@iworks.InterWorks.org
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