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      1 /* $NetBSD: vbe.h,v 1.3 2011/02/09 04:37:54 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2009 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #define VBE_DEFAULT_MODE	0x101	/* 640x480x8 */
     30 
     31 struct vbeinfoblock {
     32 	char VbeSignature[4];
     33 	uint16_t VbeVersion;
     34 	uint32_t OemStringPtr;
     35 	uint32_t Capabilities;
     36 	uint32_t VideoModePtr;
     37 	uint16_t TotalMemory;
     38 	uint16_t OemSoftwareRev;
     39 	uint32_t OemVendorNamePtr, OemProductNamePtr, OemProductRevPtr;
     40 	/* data area, in total max 512 bytes for VBE 2.0 */
     41 	uint8_t Reserved[222];
     42 	uint8_t OemData[256];
     43 } __packed;
     44 
     45 struct modeinfoblock {
     46 	/* Mandatory information for all VBE revisions */
     47 	uint16_t ModeAttributes;
     48 	uint8_t WinAAttributes, WinBAttributes;
     49 	uint16_t WinGranularity, WinSize, WinASegment, WinBSegment;
     50 	uint32_t WinFuncPtr;
     51 	uint16_t BytesPerScanLine;
     52 	/* Mandatory information for VBE 1.2 and above */
     53 	uint16_t XResolution, YResolution;
     54 	uint8_t XCharSize, YCharSize, NumberOfPlanes, BitsPerPixel;
     55 	uint8_t NumberOfBanks, MemoryModel, BankSize, NumberOfImagePages;
     56 	uint8_t Reserved1;
     57 	/* Direct Color fields
     58 	   (required for direct/6 and YUV/7 memory models) */
     59 	uint8_t RedMaskSize, RedFieldPosition;
     60 	uint8_t GreenMaskSize, GreenFieldPosition;
     61 	uint8_t BlueMaskSize, BlueFieldPosition;
     62 	uint8_t RsvdMaskSize, RsvdFieldPosition;
     63 	uint8_t DirectColorModeInfo;
     64 	/* Mandatory information for VBE 2.0 and above */
     65 	uint32_t PhysBasePtr;
     66 	uint32_t OffScreenMemOffset;	/* reserved in VBE 3.0 and above */
     67 	uint16_t OffScreenMemSize;	/* reserved in VBE 3.0 and above */
     68 
     69 	/* Mandatory information for VBE 3.0 and above */
     70 	uint16_t LinBytesPerScanLine;
     71 	uint8_t BnkNumberOfImagePages;
     72 	uint8_t LinNumberOfImagePages;
     73 	uint8_t LinRedMaskSize, LinRedFieldPosition;
     74 	uint8_t LinGreenMaskSize, LinGreenFieldPosition;
     75 	uint8_t LinBlueMaskSize, LinBlueFieldPosition;
     76 	uint8_t LinRsvdMaskSize, LinRsvdFieldPosition;
     77 	uint32_t MaxPixelClock;
     78 	uint8_t Reserved4[189];
     79 } __packed;
     80 
     81 struct paletteentry {
     82 	uint8_t Blue;
     83 	uint8_t Green;
     84 	uint8_t Red;
     85 	uint8_t Alignment;
     86 } __packed;
     87 
     88 /* EDID */
     89 #define	EDID_MAGIC	{ 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }
     90 #define	EDID_DESC_BLOCK	0x36
     91 
     92 /* low-level VBE calls, from biosvbe.S */
     93 int biosvbe_info(struct vbeinfoblock *);
     94 int biosvbe_set_mode(int);
     95 int biosvbe_get_mode_info(int, struct modeinfoblock *);
     96 int biosvbe_palette_format(int);
     97 int biosvbe_palette_data(int, int, struct paletteentry *);
     98 int biosvbe_ddc_caps(void);
     99 int biosvbe_ddc_read_edid(int, void *);
    100 
    101 /* high-level VBE helpers, from vbe.c */
    102 void vbe_init(void);
    103 int vbe_commit(void);
    104 int vbe_available(void);
    105 int vbe_set_mode(int);
    106 int vbe_set_palette(const uint8_t *, int);
    107 void vbe_modelist(void);
    108 
    109 void command_vesa(char *);
    110 
    111 /* adjust physical address; boot code runs with %ds having a 64k offset */
    112 #define VBEPHYPTR(x)	((uint8_t *)((x) - (64 * 1024)))
    113