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302 lines
10 KiB
C
302 lines
10 KiB
C
/*
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* FreeLoader
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* Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <freeldr.h>
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#include <debug.h>
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DBG_DEFAULT_CHANNEL(HWDETECT);
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#include <pshpack2.h>
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typedef struct
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{
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UCHAR Signature[4]; // (ret) signature ("VESA")
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// (call) VESA 2.0 request signature ("VBE2"), required to receive
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// version 2.0 info
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USHORT VesaVersion; // VESA version number (one-digit minor version -- 0102h = v1.2)
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ULONG OemNamePtr; // pointer to OEM name
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// "761295520" for ATI
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ULONG Capabilities; // capabilities flags (see #00078)
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ULONG SupportedModeListPtr; // pointer to list of supported VESA and OEM video modes
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// (list of words terminated with FFFFh)
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USHORT TotalVideoMemory; // total amount of video memory in 64K blocks
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// ---VBE v1.x ---
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//UCHAR Reserved[236];
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// ---VBE v2.0 ---
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USHORT OemSoftwareVersion; // OEM software version (BCD, high byte = major, low byte = minor)
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ULONG VendorNamePtr; // pointer to vendor name
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ULONG ProductNamePtr; // pointer to product name
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ULONG ProductRevisionStringPtr; // pointer to product revision string
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USHORT VBE_AF_Version; // (if capabilities bit 3 set) VBE/AF version (BCD)
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// 0100h for v1.0P
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ULONG AcceleratedModeListPtr; // (if capabilities bit 3 set) pointer to list of supported
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// accelerated video modes (list of words terminated with FFFFh)
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UCHAR Reserved[216]; // reserved for VBE implementation
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UCHAR ScratchPad[256]; // OEM scratchpad (for OEM strings, etc.)
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} VESA_SVGA_INFO, *PVESA_SVGA_INFO;
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#include <poppack.h>
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// Bitfields for VESA capabilities:
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//
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// Bit(s) Description (Table 00078)
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// 0 DAC can be switched into 8-bit mode
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// 1 non-VGA controller
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// 2 programmed DAC with blank bit (i.e. only during blanking interval)
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// 3 (VBE v3.0) controller supports hardware stereoscopic signalling
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// 3 controller supports VBE/AF v1.0P extensions
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// 4 (VBE v3.0) if bit 3 set:
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// =0 stereo signalling via external VESA stereo connector
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// =1 stereo signalling via VESA EVC connector
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// 4 (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
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// 5 (VBE/AF v1.0P) controller supports hardware mouse cursor
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// 6 (VBE/AF v1.0P) controller supports hardware clipping
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// 7 (VBE/AF v1.0P) controller supports transparent BitBLT
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// 8-31 reserved (0)
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// Notes: The list of supported video modes is stored in the reserved
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// portion of the SuperVGA information record by some implementations,
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// and it may thus be necessary to either copy the mode list or use a
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// different buffer for all subsequent VESA calls. Not all of the video
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// modes in the list of mode numbers may be supported, e.g. if they require
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// more memory than currently installed or are not supported by the
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// attached monitor. Check any mode you intend to use through AX=4F01h first..
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// The 1.1 VESA document specifies 242 reserved bytes at the end, so the
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// buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
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// the buffer should be 512 bytes. The S3 specific video modes will most
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// likely follow the FFFFh terminator at the end of the standard modes.
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// A search must then be made to find them, FFFFh will also terminate this
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// second list. In some cases, only a "stub" VBE may be present, supporting
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// only AX=4F00h; this case may be assumed if the list of supported video modes
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// is empty (consisting of a single word of FFFFh)
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#if 0
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static VOID BiosSetVideoFont8x16(VOID)
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{
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REGS Regs;
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// Int 10h AX=1114h
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// VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
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//
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// AX = 1114h
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// BL = block to load
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// Return:
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// Nothing
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Regs.w.ax = 0x1114;
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Regs.b.bl = 0;
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Int386(0x10, &Regs, &Regs);
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}
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static VOID VideoSetTextCursorPosition(ULONG X, ULONG Y)
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{
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}
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static ULONG VideoGetTextCursorPositionX(VOID)
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{
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REGS Regs;
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// Int 10h AH=03h
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// VIDEO - GET CURSOR POSITION AND SIZE
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//
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// AH = 03h
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// BH = page number
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// 0-3 in modes 2&3
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// 0-7 in modes 0&1
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// 0 in graphics modes
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// Return:
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// AX = 0000h (Phoenix BIOS)
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// CH = start scan line
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// CL = end scan line
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// DH = row (00h is top)
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// DL = column (00h is left)
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Regs.b.ah = 0x03;
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Regs.b.bh = 0x00;
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Int386(0x10, &Regs, &Regs);
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return Regs.b.dl;
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}
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static ULONG VideoGetTextCursorPositionY(VOID)
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{
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REGS Regs;
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// Int 10h AH=03h
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// VIDEO - GET CURSOR POSITION AND SIZE
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//
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// AH = 03h
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// BH = page number
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// 0-3 in modes 2&3
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// 0-7 in modes 0&1
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// 0 in graphics modes
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// Return:
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// AX = 0000h (Phoenix BIOS)
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// CH = start scan line
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// CL = end scan line
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// DH = row (00h is top)
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// DL = column (00h is left)
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Regs.b.ah = 0x03;
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Regs.b.bh = 0x00;
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Int386(0x10, &Regs, &Regs);
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return Regs.b.dh;
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}
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#endif
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USHORT BiosIsVesaSupported(VOID)
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{
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REGS Regs;
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PVESA_SVGA_INFO SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
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//USHORT* VideoModes;
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//USHORT Index;
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TRACE("BiosIsVesaSupported()\n");
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RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
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// Make sure we receive version 2.0 info
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SvgaInfo->Signature[0] = 'V';
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SvgaInfo->Signature[1] = 'B';
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SvgaInfo->Signature[2] = 'E';
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SvgaInfo->Signature[3] = '2';
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// Int 10h AX=4F00h
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// VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
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//
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// AX = 4F00h
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// ES:DI -> buffer for SuperVGA information (see #00077)
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// Return:
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// AL = 4Fh if function supported
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// AH = status
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// 00h successful
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// ES:DI buffer filled
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// 01h failed
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// ---VBE v2.0---
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// 02h function not supported by current hardware configuration
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// 03h function invalid in current video mode
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//
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// Determine whether VESA BIOS extensions are present and the
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// capabilities supported by the display adapter
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//
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// Installation check;VESA SuperVGA
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Regs.w.ax = 0x4F00;
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Regs.w.es = BIOSCALLBUFSEGMENT;
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Regs.w.di = BIOSCALLBUFOFFSET;
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Int386(0x10, &Regs, &Regs);
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TRACE("AL = 0x%x\n", Regs.b.al);
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TRACE("AH = 0x%x\n", Regs.b.ah);
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if (Regs.w.ax != 0x004F)
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{
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WARN("VBE Get SuperVGA information function not supported (AL=0x%x) or failed (AH=0x%x)\n",
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Regs.b.al, Regs.b.ah);
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return 0x0000;
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}
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TRACE("Supported.\n");
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TRACE("SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]);
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TRACE("SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF));
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TRACE("SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr);
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TRACE("SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities);
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TRACE("SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64);
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TRACE("---VBE v2.0 ---\n");
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TRACE("SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo->OemSoftwareVersion >> 8) & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 12) & 0x0F) * 10), (SvgaInfo->OemSoftwareVersion & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 4) & 0x0F) * 10));
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TRACE("SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr);
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TRACE("SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr);
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TRACE("SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr);
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TRACE("SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version);
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if (SvgaInfo->Signature[0] != 'V' ||
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SvgaInfo->Signature[1] != 'E' ||
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SvgaInfo->Signature[2] != 'S' ||
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SvgaInfo->Signature[3] != 'A')
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{
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ERR("Bad signature in VESA information (%c%c%c%c)\n",
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SvgaInfo->Signature[0],
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SvgaInfo->Signature[1],
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SvgaInfo->Signature[2],
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SvgaInfo->Signature[3]);
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return 0x0000;
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}
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return SvgaInfo->VesaVersion;
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}
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BOOLEAN
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BiosIsVesaDdcSupported(VOID)
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{
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REGS Regs;
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TRACE("BiosIsVesaDdcSupported()\n");
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Regs.w.ax = 0x4F15;
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Regs.b.bl = 0;
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Regs.w.cx = 0;
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Regs.w.es = 0;
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Regs.w.di = 0;
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Int386(0x10, &Regs, &Regs);
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TRACE("AL = 0x%x\n", Regs.b.al);
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TRACE("AH = 0x%x\n", Regs.b.ah);
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TRACE("BL = 0x%x\n", Regs.b.bl);
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if (Regs.w.ax != 0x004F)
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{
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WARN("VBE/DDC Installation check function not supported (AL=0x%x) or failed (AH=0x%x)\n",
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Regs.b.al, Regs.b.ah);
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return FALSE;
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}
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return (Regs.b.ah == 0);
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}
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BOOLEAN
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BiosVesaReadEdid(VOID)
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{
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REGS Regs;
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TRACE("BiosVesaReadEdid()\n");
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RtlZeroMemory((PVOID)BIOSCALLBUFFER, 128);
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Regs.w.ax = 0x4F15;
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Regs.b.bl = 1;
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Regs.w.cx = 0;
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Regs.w.dx = 0;
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Regs.w.es = BIOSCALLBUFSEGMENT;
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Regs.w.di = BIOSCALLBUFOFFSET;
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Int386(0x10, &Regs, &Regs);
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TRACE("AL = 0x%x\n", Regs.b.al);
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TRACE("AH = 0x%x\n", Regs.b.ah);
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if (Regs.w.ax != 0x004F)
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{
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WARN("VBE/DDC Read EDID function not supported (AL=0x%x) or failed (AH=0x%x)\n",
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Regs.b.al, Regs.b.ah);
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return FALSE;
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}
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return (Regs.b.ah == 0);
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}
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/* EOF */
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