Author: jkim
Date: Wed Feb 15 22:10:33 2012
New Revision: 231787
URL: http://svn.freebsd.org/changeset/base/231787
Log:
Make ACPI resume beeper less cryptic. Set PIC timer2 mode properly.
Modified:
head/sys/amd64/acpica/acpi_wakecode.S
Modified: head/sys/amd64/acpica/acpi_wakecode.S
==============================================================================
--- head/sys/amd64/acpica/acpi_wakecode.S Wed Feb 15 22:07:09 2012
(r231786)
+++ head/sys/amd64/acpica/acpi_wakecode.S Wed Feb 15 22:10:33 2012
(r231787)
@@ -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. */
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