vbe.h

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/******************************************************************************
 * Copyright (c) 2004, 2008 IBM Corporation
 * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
 * All rights reserved.
 * This program and the accompanying materials
 * are made available under the terms of the BSD License
 * which accompanies this distribution, and is available at
 * http://www.opensource.org/licenses/bsd-license.php
 *
 * Contributors:
 *     IBM Corporation - initial implementation
 *****************************************************************************/
#ifndef VBE_H
#define VBE_H
 
#include <stdint.h>
 
// these structs are for input from and output to OF
typedef struct {
        u8 display_type;        // 0 = NONE, 1 = analog, 2 = digital
        u16 screen_width;
        u16 screen_height;
        u16 screen_linebytes;   // bytes per line in framebuffer, may be more
                                // than screen_width
        u8 color_depth; // color depth in bits per pixel
        u32 framebuffer_address;
        u8 edid_block_zero[128];
} __packed screen_info_t;
 
typedef struct {
        u8 signature[4];
        u16 size_reserved;
        u8 monitor_number;
        u16 max_screen_width;
        u8 color_depth;
} __packed screen_info_input_t;
 
typedef struct {
        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];
} __packed vesa_mode_info_t;
 
typedef struct {
        u16 video_mode;
        union {
                vesa_mode_info_t vesa;
                u8 mode_info_block[256];
        };
        // our crap
        //u16 attributes;
        //u16 linebytes;
        //u16 x_resolution;
        //u16 y_resolution;
        //u8 x_charsize;
        //u8 y_charsize;
        //u8 bits_per_pixel;
        //u8 memory_model;
        //u32 framebuffer_address;
} vbe_mode_info_t;
 
typedef struct {
        u8 port_number; // i.e. monitor number
        u8 edid_transfer_time;
        u8 ddc_level;
        u8 edid_block_zero[128];
} vbe_ddc_info_t;
 
#define VESA_GET_INFO           0x4f00
#define VESA_GET_MODE_INFO      0x4f01
#define VESA_SET_MODE           0x4f02
 
void vbe_set_graphics(void);
void vbe_textmode_console(void);
 
/**
 * Returns the mode_info struct from the vbe context,
 * if initialized. NULL on invalid mode_infos.
 */
const vbe_mode_info_t *vbe_mode_info(void);
 
#endif // VBE_H