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Patch to fix QIC-02/QIC-36 by Gene Stark. 

From patch003 in CLEAR-1.1.5.1-PATCHES.
Submitted by:	Gene Stark
This commit is contained in:
Steven Wallace 1994-10-25 08:57:39 +00:00
parent 1b55c5bc85
commit 669a646390
1 changed files with 17 additions and 5 deletions
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22
sys/i386/isa/wt.c
View File

@ -19,7 +19,7 @@
* the original CMU copyright notice.
*
* Version 1.3, Thu Nov 11 12:09:13 MSK 1993
* $Id: wt.c,v 1.11 1994/09/16 13:33:51 davidg Exp $
* $Id: wt.c,v 1.12 1994/10/23 21:27:42 wollman Exp $
*
*/
@ -722,12 +722,15 @@ static int wtpoll (wtinfo_t *t, int mask, int bits)
/* execute QIC command */
static int wtcmd (wtinfo_t *t, int cmd)
{
int s;
int s, x;
DEBUG (("wtcmd() cmd=0x%x\n", cmd));
x = splbio();
s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
if (! (s & t->NOEXCEP)) /* error */
if (! (s & t->NOEXCEP)) { /* error */
splx(x);
return (0);
}
outb (t->CMDPORT, cmd); /* output the command */
@ -735,6 +738,7 @@ static int wtcmd (wtinfo_t *t, int cmd)
wtpoll (t, t->BUSY, t->BUSY); /* wait for ready */
outb (t->CTLPORT, t->IEN | t->ONLINE); /* reset request */
wtpoll (t, t->BUSY, 0); /* wait for not ready */
splx(x);
return (1);
}
@ -769,12 +773,14 @@ static void wtdma (wtinfo_t *t)
/* start i/o operation */
static int wtstart (wtinfo_t *t, unsigned flags, void *vaddr, unsigned len)
{
int s;
int s, x;
DEBUG (("wtstart()\n"));
x = splbio();
s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
if (! (s & t->NOEXCEP)) {
t->flags |= TPEXCEP; /* error */
splx(x);
return (0);
}
t->flags &= ~TPEXCEP; /* clear exception flag */
@ -783,6 +789,7 @@ static int wtstart (wtinfo_t *t, unsigned flags, void *vaddr, unsigned len)
t->dmacount = 0;
t->dmaflags = flags;
wtdma (t);
splx(x);
return (1);
}
@ -896,7 +903,9 @@ static int wtsense (wtinfo_t *t, int verb, int ignor)
static int wtstatus (wtinfo_t *t)
{
char *p;
int x;
x = splbio();
wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
outb (t->CMDPORT, QIC_RDSTAT); /* send `read status' command */
@ -908,8 +917,10 @@ static int wtstatus (wtinfo_t *t)
p = (char*) &t->error;
while (p < (char*)&t->error + 6) {
int s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP);
if (! (s & t->NOEXCEP)) /* error */
if (! (s & t->NOEXCEP)) { /* error */
splx(x);
return (0);
}
*p++ = inb (t->DATAPORT); /* read status byte */
@ -917,6 +928,7 @@ static int wtstatus (wtinfo_t *t)
wtpoll (t, t->BUSY, 0); /* wait for not ready */
outb (t->CTLPORT, t->ONLINE); /* unset request */
}
splx(x);
return (1);
}
#endif /* NWT */