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Make ACPI resume beeper less cryptic. Set PIC timer2 mode properly.

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This commit is contained in:
Jung-uk Kim 2012-02-15 22:10:33 +00:00
parent ceb9fa549f
commit b1dd90550d
1 changed files with 17 additions and 7 deletions
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24
sys/amd64/acpica/acpi_wakecode.S
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@ -30,7 +30,9 @@
*/
#include <machine/asmacros.h>
#include <machine/ppireg.h>
#include <machine/specialreg.h>
#include <machine/timerreg.h>
#include "assym.s"
@ -71,13 +73,21 @@ wakeup_start:
testb $~0, resume_beep - wakeup_start
jz 1f
movb $0, resume_beep - wakeup_start
movb $0xc0, %al
outb %al, $0x42
movb $0x04, %al
outb %al, $0x42
inb $0x61, %al
orb $0x3, %al
outb %al, $0x61
/* Set PIC timer2 to beep. */
movb $(TIMER_SEL2 | TIMER_SQWAVE | TIMER_16BIT), %al
outb %al, $TIMER_MODE
/* Turn on speaker. */
inb $IO_PPI, %al
orb $PIT_SPKR, %al
outb %al, $IO_PPI
/* Set frequency. */
movw $0x4c0, %ax
outb %al, $TIMER_CNTR2
shrw $8, %ax
outb %al, $TIMER_CNTR2
1:
/* Re-initialize video BIOS if the reset_video tunable is set. */