include/vbe.h

   1 /******************************************************************************
   2  * Copyright (c) 2004, 2008 IBM Corporation
   3  * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier:     BSD-2-Clause
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial implementation
  10  *****************************************************************************/
  11 #ifndef _VBE_H
  12 #define _VBE_H
  13
  14 /* these structs are for input from and output to OF */
  15 struct __packed screen_info {
  16         u8 display_type;        /* 0=NONE, 1= analog, 2=digital */
  17         u16 screen_width;
  18         u16 screen_height;
  19         /* bytes per line in framebuffer, may be more than screen_width */
  20         u16 screen_linebytes;
  21         u8 color_depth; /* color depth in bits per pixel */
  22         u32 framebuffer_address;
  23         u8 edid_block_zero[128];
  24 };
  25
  26 struct __packed screen_info_input {
  27         u8 signature[4];
  28         u16 size_reserved;
  29         u8 monitor_number;
  30         u16 max_screen_width;
  31         u8 color_depth;
  32 };
  33
  34 /* these structs only store the required a subset of the VBE-defined fields */
  35 struct __packed vbe_info {
  36         char signature[4];
  37         u16 version;
  38         u8 *oem_string_ptr;
  39         u32 capabilities;
  40         u16 video_mode_list[256];
  41         u16 total_memory;
  42 };
  43
  44 struct __packed vesa_mode_info {
  45         u16 mode_attributes;    /* 00 */
  46         u8 win_a_attributes;    /* 02 */
  47         u8 win_b_attributes;    /* 03 */
  48         u16 win_granularity;    /* 04 */
  49         u16 win_size;           /* 06 */
  50         u16 win_a_segment;      /* 08 */
  51         u16 win_b_segment;      /* 0a */
  52         u32 win_func_ptr;       /* 0c */
  53         u16 bytes_per_scanline; /* 10 */
  54         u16 x_resolution;       /* 12 */
  55         u16 y_resolution;       /* 14 */
  56         u8 x_charsize;          /* 16 */
  57         u8 y_charsize;          /* 17 */
  58         u8 number_of_planes;    /* 18 */
  59         u8 bits_per_pixel;      /* 19 */
  60         u8 number_of_banks;     /* 20 */
  61         u8 memory_model;        /* 21 */
  62         u8 bank_size;           /* 22 */
  63         u8 number_of_image_pages; /* 23 */
  64         u8 reserved_page;
  65         u8 red_mask_size;
  66         u8 red_mask_pos;
  67         u8 green_mask_size;
  68         u8 green_mask_pos;
  69         u8 blue_mask_size;
  70         u8 blue_mask_pos;
  71         u8 reserved_mask_size;
  72         u8 reserved_mask_pos;
  73         u8 direct_color_mode_info;
  74         u32 phys_base_ptr;
  75         u32 offscreen_mem_offset;
  76         u16 offscreen_mem_size;
  77         u8 reserved[206];
  78 };
  79
  80 struct vbe_mode_info {
  81         u16 video_mode;
  82         bool valid;
  83         union {
  84                 struct vesa_mode_info vesa;
  85                 u8 mode_info_block[256];
  86         };
  87 };
  88
  89 struct vbe_ddc_info {
  90         u8 port_number; /* i.e. monitor number */
  91         u8 edid_transfer_time;
  92         u8 ddc_level;
  93         u8 edid_block_zero[128];
  94 };
  95
  96 #define VESA_GET_INFO           0x4f00
  97 #define VESA_GET_MODE_INFO      0x4f01
  98 #define VESA_SET_MODE           0x4f02
  99
 100 struct graphic_device;
 101 int vbe_get_video_info(struct graphic_device *gdev);
 102
 103 #endif