src/include/vbe.h

   1 /* SPDX-License-Identifier: BSD-2-Clause */
   2
   3 /******************************************************************************
   4  * Copyright (c) 2004, 2008 IBM Corporation
   5  * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
   6  * All rights reserved.
   7  * This program and the accompanying materials
   8  * are made available under the terms of the BSD License
   9  * which accompanies this distribution, and is available at
  10  * http://www.opensource.org/licenses/bsd-license.php
  11  *
  12  * Contributors:
  13  *     IBM Corporation - initial implementation
  14  *****************************************************************************/
  15 #ifndef VBE_H
  16 #define VBE_H
  17
  18 #include <stdint.h>
  19
  20 // these structs are for input from and output to OF
  21 typedef struct {
  22         u8 display_type;        // 0 = NONE, 1 = analog, 2 = digital
  23         u16 screen_width;
  24         u16 screen_height;
  25         u16 screen_linebytes;   // bytes per line in framebuffer, may be more
  26                                 // than screen_width
  27         u8 color_depth; // color depth in bits per pixel
  28         u32 framebuffer_address;
  29         u8 edid_block_zero[128];
  30 } __packed screen_info_t;
  31
  32 typedef struct {
  33         u8 signature[4];
  34         u16 size_reserved;
  35         u8 monitor_number;
  36         u16 max_screen_width;
  37         u8 color_depth;
  38 } __packed screen_info_input_t;
  39
  40 typedef struct {
  41         u16 mode_attributes; // 00
  42         u8 win_a_attributes; // 02
  43         u8 win_b_attributes; // 03
  44         u16 win_granularity; // 04
  45         u16 win_size;        // 06
  46         u16 win_a_segment;   // 08
  47         u16 win_b_segment;   // 0a
  48         u32 win_func_ptr;    // 0c
  49         u16 bytes_per_scanline; // 10
  50         u16 x_resolution;    // 12
  51         u16 y_resolution;    // 14
  52         u8 x_charsize;       // 16
  53         u8 y_charsize;       // 17
  54         u8 number_of_planes; // 18
  55         u8 bits_per_pixel;   // 19
  56         u8 number_of_banks;  // 20
  57         u8 memory_model;     // 21
  58         u8 bank_size;        // 22
  59         u8 number_of_image_pages; // 23
  60         u8 reserved_page;
  61         u8 red_mask_size;
  62         u8 red_mask_pos;
  63         u8 green_mask_size;
  64         u8 green_mask_pos;
  65         u8 blue_mask_size;
  66         u8 blue_mask_pos;
  67         u8 reserved_mask_size;
  68         u8 reserved_mask_pos;
  69         u8 direct_color_mode_info;
  70         u32 phys_base_ptr;
  71         u32 offscreen_mem_offset;
  72         u16 offscreen_mem_size;
  73         u8 reserved[206];
  74 } __packed vesa_mode_info_t;
  75
  76 typedef struct {
  77         u16 video_mode;
  78         union {
  79                 vesa_mode_info_t vesa;
  80                 u8 mode_info_block[256];
  81         };
  82         // our crap
  83         //u16 attributes;
  84         //u16 linebytes;
  85         //u16 x_resolution;
  86         //u16 y_resolution;
  87         //u8 x_charsize;
  88         //u8 y_charsize;
  89         //u8 bits_per_pixel;
  90         //u8 memory_model;
  91         //u32 framebuffer_address;
  92 } vbe_mode_info_t;
  93
  94 typedef struct {
  95         u8 port_number; // i.e. monitor number
  96         u8 edid_transfer_time;
  97         u8 ddc_level;
  98         u8 edid_block_zero[128];
  99 } vbe_ddc_info_t;
 100
 101 #define VESA_GET_INFO           0x4f00
 102 #define VESA_GET_MODE_INFO      0x4f01
 103 #define VESA_SET_MODE           0x4f02
 104
 105 void vbe_set_graphics(void);
 106 void vbe_textmode_console(void);
 107
 108 /**
 109  * Returns the mode_info struct from the vbe context,
 110  * if initialized. NULL on invalid mode_infos.
 111  */
 112 const vbe_mode_info_t *vbe_mode_info(void);
 113
 114 #endif // VBE_H