# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1211365181 -3600
# Node ID b58e95aee14f0190a95b2ae610c24c8fe09e8c7a
# Parent 70ca37d228951e98fdf2b5f9bd5883a04321c2c8
vgabios: Support VESA power management extensions.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
tools/firmware/vgabios/clext.c | 54 ++++++++++++++++++++++++++++++++++---
tools/firmware/vgabios/vgatables.h | 1
2 files changed, 52 insertions(+), 3 deletions(-)
diff -r 70ca37d22895 -r b58e95aee14f tools/firmware/vgabios/clext.c
--- a/tools/firmware/vgabios/clext.c Wed May 21 11:07:23 2008 +0100
+++ b/tools/firmware/vgabios/clext.c Wed May 21 11:19:41 2008 +0100
@@ -26,6 +26,7 @@
#define PM_BIOSMEM_CURRENT_MODE 0x449
#define PM_BIOSMEM_CRTC_ADDRESS 0x463
#define PM_BIOSMEM_VBE_MODE 0x4BA
+#define PM_BIOSMEM_VBE_POWER 0x4BC
typedef struct
{
@@ -491,7 +492,7 @@ cirrus_vesa:
#ifdef CIRRUS_DEBUG
call cirrus_debug_dump
#endif
- cmp al, #0x0F
+ cmp al, #0x10
ja cirrus_vesa_not_handled
push bx
xor bx, bx
@@ -682,7 +683,7 @@ c80h_2:
ret
cirrus_extbios_81h:
- mov ax, #0x100 ;; XXX
+ mov ax, #0x103 ;; XXX
ret
cirrus_extbios_82h:
push dx
@@ -1175,6 +1176,52 @@ cirrus_vesa_07h_2:
mov cx, ax
pop dx
mov ax, #0x004f
+ ret
+
+cirrus_vesa_10h: ;; Power management functions
+ ;; Set up DS to read stored power info from RAM
+ push ds
+#ifdef CIRRUS_VESA3_PMINFO
+ db 0x2e ;; cs:
+ mov ax, [cirrus_vesa_sel0000_data]
+#else
+ xor ax, ax
+#endif
+ mov ds, ax
+ ;; Now choose the right function
+ cmp bl, #0x00
+ ja cirrus_vesa_10h_01
+ ;;
+ ;; Function 00h: Get capabilities
+ ;;
+ mov bx, #0x0720 ;; 07: standby/suspend/off, 20: VBE/PM 2.0
+ mov ax, #0x004f
+ jmp cirrus_vesa_10h_done
+cirrus_vesa_10h_01:
+ cmp bl, #0x01
+ ja cirrus_vesa_10h_02
+ ;;
+ ;; Function 01h: Set power state
+ ;;
+ mov ax, bx
+ mov bx, # PM_BIOSMEM_VBE_POWER
+ mov [bx], ah
+ mov ax, #0x004f
+ jmp cirrus_vesa_10h_done
+cirrus_vesa_10h_02:
+ cmp bl, #0x02
+ ja cirrus_vesa_10h_unimplemented
+ ;;
+ ;; Function 02h: Get power state
+ ;;
+ mov bx, # PM_BIOSMEM_VBE_POWER
+ mov bh, [bx]
+ mov ax, #0x004f
+ jmp cirrus_vesa_10h_done
+cirrus_vesa_10h_unimplemented:
+ mov ax, #0x014F ;; not implemented
+cirrus_vesa_10h_done:
+ pop ds
ret
cirrus_vesa_unimplemented:
@@ -1601,7 +1648,8 @@ cirrus_vesa_handlers:
dw cirrus_vesa_unimplemented
dw cirrus_vesa_unimplemented
dw cirrus_vesa_unimplemented
-
+ ;; 10h
+ dw cirrus_vesa_10h
ASM_END
diff -r 70ca37d22895 -r b58e95aee14f tools/firmware/vgabios/vgatables.h
--- a/tools/firmware/vgabios/vgatables.h Wed May 21 11:07:23 2008 +0100
+++ b/tools/firmware/vgabios/vgatables.h Wed May 21 11:19:41 2008 +0100
@@ -25,6 +25,7 @@
#define BIOSMEM_VS_POINTER 0xA8
#define BIOSMEM_VBE_FLAG 0xB9
#define BIOSMEM_VBE_MODE 0xBA
+#define BIOSMEM_VBE_POWER 0xBC
/*
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