include/vesa.h

   1 /* SPDX-License-Identifier: BSD-2-Clause */
   2 /******************************************************************************
   3  * Copyright (c) 2004, 2008 IBM Corporation
   4  * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
   5  * All rights reserved.
   6  *
   7  * Contributors:
   8  *     IBM Corporation - initial implementation
   9  *****************************************************************************/
  10 #ifndef _VESA_H
  11 #define _VESA_H
  12
  13 /* these structs are for input from and output to OF */
  14 struct __packed vesa_screen_info {
  15         u8 display_type;        /* 0=NONE, 1= analog, 2=digital */
  16         u16 screen_width;
  17         u16 screen_height;
  18         /* bytes per line in framebuffer, may be more than screen_width */
  19         u16 screen_linebytes;
  20         u8 color_depth; /* color depth in bits per pixel */
  21         u32 framebuffer_address;
  22         u8 edid_block_zero[128];
  23 };
  24
  25 struct __packed vesa_screen_info_input {
  26         u8 signature[4];
  27         u16 size_reserved;
  28         u8 monitor_number;
  29         u16 max_screen_width;
  30         u8 color_depth;
  31 };
  32
  33 /*
  34  * These structs only store the required subset of fields  in Vesa BIOS
  35  * Extensions
  36  */
  37 struct __packed vesa_bios_ext_info {
  38         char signature[4];
  39         u16 version;
  40         u32 oem_string_ptr;
  41         u32 capabilities;
  42         u32 modes_ptr;
  43         u16 total_memory;
  44         u16 oem_version;
  45         u32 vendor_name_ptr;
  46         u32 product_name_ptr;
  47         u32 product_rev_ptr;
  48 };
  49
  50 struct __packed vesa_mode_info {
  51         u16 mode_attributes;    /* 00 */
  52         u8 win_a_attributes;    /* 02 */
  53         u8 win_b_attributes;    /* 03 */
  54         u16 win_granularity;    /* 04 */
  55         u16 win_size;           /* 06 */
  56         u16 win_a_segment;      /* 08 */
  57         u16 win_b_segment;      /* 0a */
  58         u32 win_func_ptr;       /* 0c */
  59         u16 bytes_per_scanline; /* 10 */
  60         u16 x_resolution;       /* 12 */
  61         u16 y_resolution;       /* 14 */
  62         u8 x_charsize;          /* 16 */
  63         u8 y_charsize;          /* 17 */
  64         u8 number_of_planes;    /* 18 */
  65         u8 bits_per_pixel;      /* 19 */
  66         u8 number_of_banks;     /* 20 */
  67         u8 memory_model;        /* 21 */
  68         u8 bank_size;           /* 22 */
  69         u8 number_of_image_pages; /* 23 */
  70         u8 reserved_page;
  71         u8 red_mask_size;
  72         u8 red_mask_pos;
  73         u8 green_mask_size;
  74         u8 green_mask_pos;
  75         u8 blue_mask_size;
  76         u8 blue_mask_pos;
  77         u8 reserved_mask_size;
  78         u8 reserved_mask_pos;
  79         u8 direct_color_mode_info;
  80         u32 phys_base_ptr;
  81         u32 offscreen_mem_offset;
  82         u16 offscreen_mem_size;
  83         u8 reserved[206];
  84 };
  85
  86 struct vesa_state {
  87         u16 video_mode;
  88         bool valid;
  89         union {
  90                 struct vesa_mode_info vesa;
  91                 u8 mode_info_block[256];
  92         };
  93 };
  94
  95 struct vesa_ddc_info {
  96         u8 port_number; /* i.e. monitor number */
  97         u8 edid_transfer_time;
  98         u8 ddc_level;
  99         u8 edid_block_zero[128];
 100 };
 101
 102 #define VESA_GET_INFO           0x4f00
 103 #define VESA_GET_MODE_INFO      0x4f01
 104 #define VESA_SET_MODE           0x4f02
 105 #define VESA_GET_CUR_MODE       0x4f03
 106
 107 extern struct vesa_state mode_info;
 108
 109 struct video_priv;
 110 struct video_uc_plat;
 111
 112 /**
 113  * vesa_setup_video_priv() - Set up a video device using VESA information
 114  *
 115  * The vesa struct is used by various x86 drivers, so this is a common function
 116  * to use it to set up the video.
 117  *
 118  * @vesa: Vesa information to use (vesa->phys_base_ptr is ignored)
 119  * @fb: Frame buffer address (since vesa->phys_base_ptr is only 32 bits)
 120  * @uc_priv: Video device's uclass-private information
 121  * @plat: Video devices's uclass-private platform data
 122  * Returns: 0 if OK, -ENXIO if the x resolution is 0, -EEPROTONOSUPPORT if the
 123  * pixel format is not supported
 124  */
 125 int vesa_setup_video_priv(struct vesa_mode_info *vesa, u64 fb,
 126                           struct video_priv *uc_priv,
 127                           struct video_uc_plat *plat);
 128 int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void));
 129
 130 #endif