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Add match code to detect more than one SCSI adapter on 3100. 

Provided by Bertram Barth.
This commit is contained in:
ragge 1997-10-19 20:35:15 +00:00
parent 7507e6a5e9
commit 2260651129
1 changed files with 23 additions and 3 deletions
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26
sys/arch/vax/vsa/ncr.c
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@ -1,4 +1,4 @@
/* $NetBSD: ncr.c,v 1.9 1997/08/27 11:24:34 bouyer Exp $ */
/* $NetBSD: ncr.c,v 1.10 1997/10/19 20:35:15 ragge Exp $ */
/* #define DEBUG /* */
/* #define TRACE /* */
@ -300,6 +300,8 @@ si_match(parent, match, aux)
{
struct cfdata *cf = match;
struct confargs *ca = aux;
volatile int *base;
int res;
trace(("ncr_match(0x%x, %d, %s)\n", parent, cf->cf_unit, ca->ca_name));
@ -308,10 +310,28 @@ si_match(parent, match, aux)
strcmp(ca->ca_name, "NCR5380"))
return (0);
base = (void*)uvax_phys2virt(ca->ca_ioaddr);
printf("probing for SCSI controller at 0x%x...\n", ca->ca_ioaddr);
/*
* we just define it being there ...
* this is rather brute force attempt:
* it seems that writing -1 to the location of the ncr's registers
* results in 0x000000?? (8-bit registers) if ncr5380 exists and
* in 0xffffffff if there's no ncr5380 at this address.
*/
return (1);
*base = -1; /* might be sufficient to check first reg. only */
res = *base;
printf("result: 0x%x (%d)\n", res, res);
res >>= 16;
if (res == 0xffff) {
printf("no NCR5380 at 0x%x.\n", ca->ca_ioaddr);
return (0);
}
else if (res == 0) {
printf("SCSI controller found.\n");
return (1);
}
printf("unexpected/strange result 0x%x during probe.\n");
return (0);
}
integrate void