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Added code to avoid keyboard 'hangs' during the probe.

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Submitted by:	Richard Wiwatowski <rjwiwat@adelaide.on.net>
This commit is contained in:
Nate Williams 1996-05-07 21:48:55 +00:00
parent 3dc061ebcf
commit a0245aeb1a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=15675
1 changed files with 7 additions and 2 deletions
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9
sys/i386/isa/psm.c
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@ -60,6 +60,7 @@
#endif /*DEVFS*/
#include <machine/mouse.h>
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
@ -75,7 +76,7 @@
#define PSM_INT_DISABLE 0x65 /* disable controller interrupts */
#define PSM_DISABLE 0xa7 /* disable auxiliary port */
#define PSM_ENABLE 0xa8 /* enable auxiliary port */
#define PSM_ENABLE 0xa9 /* test auxiliary port */
#define PSM_AUX_TEST 0xa9 /* test auxiliary port */
/* mouse commands */
#define PSM_SET_SCALE11 0xe6 /* set 1:1 scaling */
@ -187,6 +188,7 @@ psmprobe(struct isa_device *dvp)
ioport=dvp->id_iobase;
unit=dvp->id_unit;
#ifndef PSM_NO_RESET
psm_write_dev(ioport, PSM_RESET); /* Reset aux device */
#endif
@ -302,8 +304,11 @@ psm_poll_status(int ioport)
u_char c;
while(c = inb(ioport+PSM_STATUS) & 0x03)
if(c & PSM_OUTPUT_ACK == PSM_OUTPUT_ACK)
if(c & PSM_OUTPUT_ACK == PSM_OUTPUT_ACK) {
/* XXX - Avoids some keyboard hangs during probe */
DELAY(6);
inb(ioport+PSM_DATA);
}
return;
}