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| author | msmith <msmith@FreeBSD.org> | 1998-01-27 16:45:23 +0000 |
|---|---|---|
| committer | msmith <msmith@FreeBSD.org> | 1998-01-27 16:45:23 +0000 |
| commit | 3e3506a667ca4ce723231d410251c5b60d25ea9b (patch) | |
| tree | a1d2c35426379c907653762a889a7b79aed40a3f /sys/i386/isa/atapi.c | |
| parent | 1fb3fbf76236cf062ff695faf9b1837b10634d95 (diff) | |
| download | FreeBSD-src-3e3506a667ca4ce723231d410251c5b60d25ea9b.zip FreeBSD-src-3e3506a667ca4ce723231d410251c5b60d25ea9b.tar.gz | |
Check the status port after waiting for DRQ; some drives seem to be very
slow coming off the bus (eg. Iomega's ATAPI Zip). Failure to do
this results in a false probe of an ATAPI device with garbage
data.
Diffstat (limited to 'sys/i386/isa/atapi.c')
| -rw-r--r-- | sys/i386/isa/atapi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/i386/isa/atapi.c b/sys/i386/isa/atapi.c index 56fbbfb..09439cb 100644 --- a/sys/i386/isa/atapi.c +++ b/sys/i386/isa/atapi.c @@ -422,6 +422,15 @@ static struct atapi_params *atapi_probe (int port, int unit) return (0); } + /* check that DRQ isn't a fake */ + if (inb (port + AR_STATUS) == 0xff) { + print (("atapiX.%d at 0x%x: no device\n", unit, port)); + if (unit == 1) + /* Select unit 0. */ + outb (port + AR_DRIVE, ARD_DRIVE0); + return (0); + } + /* Obtain parameters. */ insw (port + AR_DATA, tb, sizeof(tb) / sizeof(short)); |
