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authorSimon Glass <sjg@chromium.org>2014-11-14 20:56:31 -0700
committerSimon Glass <sjg@chromium.org>2014-11-25 06:34:15 -0700
commit647f56e74e398f40891b9997ae06b9fdb776825e (patch)
treea4da88a4ab722a2ddc1b3187c967b63e8c8cd2f9 /include/vbe.h
parent22465fc46cdec15594277edb33e930c773b10b9e (diff)
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Add support for Vesa BIOS extensions
For option ROMs we can use these extensions to request a particular video mode. Add a header file which defines the binary interface. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/vbe.h')
-rw-r--r--include/vbe.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/include/vbe.h b/include/vbe.h
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index 0000000..d405691
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+++ b/include/vbe.h
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+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+#ifndef _VBE_H
+#define _VBE_H
+
+/* these structs are for input from and output to OF */
+struct __packed screen_info {
+ u8 display_type; /* 0=NONE, 1= analog, 2=digital */
+ u16 screen_width;
+ u16 screen_height;
+ /* bytes per line in framebuffer, may be more than screen_width */
+ u16 screen_linebytes;
+ u8 color_depth; /* color depth in bits per pixel */
+ u32 framebuffer_address;
+ u8 edid_block_zero[128];
+};
+
+struct __packed screen_info_input {
+ u8 signature[4];
+ u16 size_reserved;
+ u8 monitor_number;
+ u16 max_screen_width;
+ u8 color_depth;
+};
+
+/* these structs only store the required a subset of the VBE-defined fields */
+struct __packed vbe_info {
+ char signature[4];
+ u16 version;
+ u8 *oem_string_ptr;
+ u32 capabilities;
+ u16 video_mode_list[256];
+ u16 total_memory;
+};
+
+struct __packed vesa_mode_info {
+ u16 mode_attributes; /* 00 */
+ u8 win_a_attributes; /* 02 */
+ u8 win_b_attributes; /* 03 */
+ u16 win_granularity; /* 04 */
+ u16 win_size; /* 06 */
+ u16 win_a_segment; /* 08 */
+ u16 win_b_segment; /* 0a */
+ u32 win_func_ptr; /* 0c */
+ u16 bytes_per_scanline; /* 10 */
+ u16 x_resolution; /* 12 */
+ u16 y_resolution; /* 14 */
+ u8 x_charsize; /* 16 */
+ u8 y_charsize; /* 17 */
+ u8 number_of_planes; /* 18 */
+ u8 bits_per_pixel; /* 19 */
+ u8 number_of_banks; /* 20 */
+ u8 memory_model; /* 21 */
+ u8 bank_size; /* 22 */
+ u8 number_of_image_pages; /* 23 */
+ u8 reserved_page;
+ u8 red_mask_size;
+ u8 red_mask_pos;
+ u8 green_mask_size;
+ u8 green_mask_pos;
+ u8 blue_mask_size;
+ u8 blue_mask_pos;
+ u8 reserved_mask_size;
+ u8 reserved_mask_pos;
+ u8 direct_color_mode_info;
+ u32 phys_base_ptr;
+ u32 offscreen_mem_offset;
+ u16 offscreen_mem_size;
+ u8 reserved[206];
+};
+
+struct vbe_mode_info {
+ u16 video_mode;
+ bool valid;
+ union {
+ struct vesa_mode_info vesa;
+ u8 mode_info_block[256];
+ };
+};
+
+struct vbe_ddc_info {
+ u8 port_number; /* i.e. monitor number */
+ u8 edid_transfer_time;
+ u8 ddc_level;
+ u8 edid_block_zero[128];
+};
+
+#define VESA_GET_INFO 0x4f00
+#define VESA_GET_MODE_INFO 0x4f01
+#define VESA_SET_MODE 0x4f02
+
+struct graphic_device;
+int vbe_get_video_info(struct graphic_device *gdev);
+
+#endif