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Message-Id: <200706192118.23706.nigel@nigel.suspend2.net>
Date: Tue, 19 Jun 2007 21:18:22 +1000
From: Nigel Cunningham <nigel@...el.suspend2.net>
To: LKML <linux-kernel@...r.kernel.org>
Cc: pavel@....cz, Rafael Wysocki <rjw@...k.pl>,
Andrew Morton <akpm@...l.org>
Subject: [PATCH] Optional Beeping During Resume From Suspend To Ram.
Hi all
Here's what I have after today's work.
I haven't yet been able to test on x86, but can confirm that it works okay on x86_64. I'm currently working towards testing it on my old Omnibook. My P4 desktop won't resume from suspend to ram at all, and hasn't produced any beeps.
I needed to move the BEEP invocation to after the data segment is reloaded, so that the test could access the variable. That was pretty tricky to find - no oops or anything bad prior, it just didn't beep when expected.
A couple of notes:
- I'd like to put the BEEP macro somewhere that can be shared by x86 32 and 64. If that's a good idea, any suggestions on where? Nothing occurs to me straight off.
- I've just switched from Evo to Kmail. Please let me know if there's any mangling of the patch.
Regards,
Nigel
arch/i386/kernel/acpi/wakeup.S | 29 ++++++++++++++++++++++++++++-
arch/x86_64/kernel/acpi/wakeup.S | 25 +++++++++++++++++++++++++
include/linux/acpi.h | 1 +
kernel/power/main.c | 23 +++++++++++++++++++++++
4 files changed, 77 insertions(+), 1 deletion(-)
diff -ruNp 970-str-beep.patch-old/arch/i386/kernel/acpi/wakeup.S 970-str-beep.patch-new/arch/i386/kernel/acpi/wakeup.S
--- 970-str-beep.patch-old/arch/i386/kernel/acpi/wakeup.S 2007-06-19 12:15:25.000000000 +1000
+++ 970-str-beep.patch-new/arch/i386/kernel/acpi/wakeup.S 2007-06-19 21:14:49.000000000 +1000
@@ -11,7 +11,22 @@
#
# If physical address of wakeup_code is 0x12345, BIOS should call us with
# cs = 0x1234, eip = 0x05
-#
+#
+
+#define BEEP \
+ inb $97, %al; \
+ outb %al, $0x80; \
+ movb $3, %al; \
+ outb %al, $97; \
+ outb %al, $0x80; \
+ movb $-74, %al; \
+ outb %al, $67; \
+ outb %al, $0x80; \
+ movb $-119, %al; \
+ outb %al, $66; \
+ outb %al, $0x80; \
+ movb $15, %al; \
+ outb %al, $66;
ALIGN
.align 4096
@@ -31,6 +46,11 @@ wakeup_code:
movw %cs, %ax
movw %ax, %ds # Make ds:0 point to wakeup_start
movw %ax, %ss
+
+ testl $1, beep_flags - wakeup_code
+ jz 1f
+ BEEP
+1:
mov $(wakeup_stack - wakeup_code), %sp # Private stack is needed for ASUS board
movw $0x0e00 + 'S', %fs:(0x12)
@@ -88,6 +108,10 @@ wakeup_code:
cmpl $0x12345678, %eax
jne bogus_real_magic
+ testl $2, beep_flags - wakeup_code
+ jz 1f
+ BEEP
+1:
ljmpl $__KERNEL_CS,$wakeup_pmode_return
real_save_gdt: .word 0
@@ -98,6 +122,7 @@ real_save_cr4: .long 0
real_magic: .long 0
video_mode: .long 0
video_flags: .long 0
+beep_flags: .long 0
real_efer_save_restore: .long 0
real_save_efer_edx: .long 0
real_save_efer_eax: .long 0
@@ -261,6 +286,8 @@ ENTRY(acpi_copy_wakeup_routine)
movl %edx, video_mode - wakeup_start (%eax)
movl acpi_video_flags, %edx
movl %edx, video_flags - wakeup_start (%eax)
+ movl s2ram_beep, %edx
+ movl %edx, beep_flags - wakeup_start (%eax)
movl $0x12345678, real_magic - wakeup_start (%eax)
movl $0x12345678, saved_magic
ret
diff -ruNp 970-str-beep.patch-old/arch/x86_64/kernel/acpi/wakeup.S 970-str-beep.patch-new/arch/x86_64/kernel/acpi/wakeup.S
--- 970-str-beep.patch-old/arch/x86_64/kernel/acpi/wakeup.S 2007-06-19 12:15:28.000000000 +1000
+++ 970-str-beep.patch-new/arch/x86_64/kernel/acpi/wakeup.S 2007-06-19 21:14:49.000000000 +1000
@@ -16,6 +16,21 @@
# cs = 0x1234, eip = 0x05
#
+#define BEEP \
+ inb $97, %al; \
+ outb %al, $0x80; \
+ movb $3, %al; \
+ outb %al, $97; \
+ outb %al, $0x80; \
+ movb $-74, %al; \
+ outb %al, $67; \
+ outb %al, $0x80; \
+ movb $-119, %al; \
+ outb %al, $66; \
+ outb %al, $0x80; \
+ movb $15, %al; \
+ outb %al, $66;
+
ALIGN
.align 16
@@ -33,6 +48,13 @@ wakeup_code:
movw %cs, %ax
movw %ax, %ds # Make ds:0 point to wakeup_start
movw %ax, %ss
+
+ # Data segment must be set up before we can see whether to beep.
+ testl $1, beep_flags - wakeup_code
+ jz 1f
+ BEEP
+1:
+
# Private stack is needed for ASUS board
mov $(wakeup_stack - wakeup_code), %sp
@@ -229,6 +251,7 @@ gdt_48a:
.long gdta - wakeup_code # gdt base (relocated in later)
real_magic: .quad 0
+beep_flags: .quad 0
video_mode: .quad 0
video_flags: .quad 0
@@ -344,6 +367,8 @@ ENTRY(acpi_copy_wakeup_routine)
pushq %rax
pushq %rdx
+ movl s2ram_beep, %edx
+ movl %edx, beep_flags - wakeup_start (,%rdi)
movl saved_video_mode, %edx
movl %edx, video_mode - wakeup_start (,%rdi)
movl acpi_video_flags, %edx
diff -ruNp 970-str-beep.patch-old/include/linux/acpi.h 970-str-beep.patch-new/include/linux/acpi.h
--- 970-str-beep.patch-old/include/linux/acpi.h 2007-06-19 21:15:08.000000000 +1000
+++ 970-str-beep.patch-new/include/linux/acpi.h 2007-06-19 21:14:49.000000000 +1000
@@ -123,6 +123,7 @@ extern int pci_mmcfg_config_num;
extern int sbf_port;
extern unsigned long acpi_video_flags;
+extern unsigned long s2ram_beep;
#else /* !CONFIG_ACPI */
diff -ruNp 970-str-beep.patch-old/kernel/power/main.c 970-str-beep.patch-new/kernel/power/main.c
--- 970-str-beep.patch-old/kernel/power/main.c 2007-06-19 12:15:55.000000000 +1000
+++ 970-str-beep.patch-new/kernel/power/main.c 2007-06-19 21:14:49.000000000 +1000
@@ -308,6 +308,27 @@ static ssize_t state_store(struct kset *
power_attr(state);
+unsigned long s2ram_beep = 0;
+
+static ssize_t s2ram_beep_show(struct kset *kset, char *buf)
+{
+ return sprintf(buf, "%d\n", s2ram_beep);
+}
+
+static ssize_t
+s2ram_beep_store(struct kset *kset, const char *buf, size_t n)
+{
+ int val;
+
+ if (sscanf(buf, "%d", &val) > 0) {
+ s2ram_beep = val;
+ return n;
+ }
+ return -EINVAL;
+}
+
+power_attr(s2ram_beep);
+
#ifdef CONFIG_PM_TRACE
int pm_trace_enabled;
@@ -333,11 +354,13 @@ power_attr(pm_trace);
static struct attribute * g[] = {
&state_attr.attr,
&pm_trace_attr.attr,
+ &s2ram_beep_attr.attr,
NULL,
};
#else
static struct attribute * g[] = {
&state_attr.attr,
+ &s2ram_beep_attr.attr,
NULL,
};
#endif /* CONFIG_PM_TRACE */
--
Nigel, Michelle and Alisdair Cunningham
5 Mitchell Street
Cobden 3266
Victoria, Australia
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