boot/freeldr/freeldr/arch/i386/i386vid.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include <freeldr.h>
  21
  22 #include <debug.h>
  23
  24 DBG_DEFAULT_CHANNEL(HWDETECT);
  25
  26 #include <pshpack2.h>
  27 typedef struct
  28 {
  29     UCHAR    Signature[4];                // (ret) signature ("VESA")
  30                                     // (call) VESA 2.0 request signature ("VBE2"), required to receive
  31                                     // version 2.0 info
  32     USHORT    VesaVersion;                // VESA version number (one-digit minor version -- 0102h = v1.2)
  33     ULONG OemNamePtr;                    // pointer to OEM name
  34                                     // "761295520" for ATI
  35     ULONG    Capabilities;                // capabilities flags (see #00078)
  36     ULONG    SupportedModeListPtr;        // pointer to list of supported VESA and OEM video modes
  37                                     // (list of words terminated with FFFFh)
  38     USHORT    TotalVideoMemory;            // total amount of video memory in 64K blocks
  39
  40     // ---VBE v1.x ---
  41     //UCHAR    Reserved[236];
  42
  43     // ---VBE v2.0 ---
  44     USHORT    OemSoftwareVersion;            // OEM software version (BCD, high byte = major, low byte = minor)
  45     ULONG    VendorNamePtr;                // pointer to vendor name
  46     ULONG    ProductNamePtr;                // pointer to product name
  47     ULONG    ProductRevisionStringPtr;    // pointer to product revision string
  48     USHORT    VBE_AF_Version;                // (if capabilities bit 3 set) VBE/AF version (BCD)
  49                                     // 0100h for v1.0P
  50     ULONG    AcceleratedModeListPtr;        // (if capabilities bit 3 set) pointer to list of supported
  51                                     // accelerated video modes (list of words terminated with FFFFh)
  52     UCHAR    Reserved[216];                // reserved for VBE implementation
  53     UCHAR    ScratchPad[256];            // OEM scratchpad (for OEM strings, etc.)
  54 } VESA_SVGA_INFO, *PVESA_SVGA_INFO;
  55 #include <poppack.h>
  56
  57 // Bitfields for VESA capabilities:
  58 //
  59 // Bit(s)  Description     (Table 00078)
  60 // 0      DAC can be switched into 8-bit mode
  61 // 1      non-VGA controller
  62 // 2      programmed DAC with blank bit (i.e. only during blanking interval)
  63 // 3      (VBE v3.0) controller supports hardware stereoscopic signalling
  64 // 3      controller supports VBE/AF v1.0P extensions
  65 // 4      (VBE v3.0) if bit 3 set:
  66 // =0 stereo signalling via external VESA stereo connector
  67 // =1 stereo signalling via VESA EVC connector
  68 // 4      (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
  69 // 5      (VBE/AF v1.0P) controller supports hardware mouse cursor
  70 // 6      (VBE/AF v1.0P) controller supports hardware clipping
  71 // 7      (VBE/AF v1.0P) controller supports transparent BitBLT
  72 // 8-31   reserved (0)
  73
  74 // Notes: The list of supported video modes is stored in the reserved
  75 // portion of the SuperVGA information record by some implementations,
  76 // and it may thus be necessary to either copy the mode list or use a
  77 // different buffer for all subsequent VESA calls. Not all of the video
  78 // modes in the list of mode numbers may be supported, e.g. if they require
  79 // more memory than currently installed or are not supported by the
  80 // attached monitor. Check any mode you intend to use through AX=4F01h first..
  81 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
  82 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
  83 // the buffer should be 512 bytes. The S3 specific video modes will most
  84 // likely follow the FFFFh terminator at the end of the standard modes.
  85 // A search must then be made to find them, FFFFh will also terminate this
  86 // second list. In some cases, only a "stub" VBE may be present, supporting
  87 // only AX=4F00h; this case may be assumed if the list of supported video modes
  88 // is empty (consisting of a single word of FFFFh)
  89 #if 0
  90 static VOID BiosSetVideoFont8x16(VOID)
  91 {
  92     REGS    Regs;
  93
  94     // Int 10h AX=1114h
  95     // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
  96     //
  97     // AX = 1114h
  98     // BL = block to load
  99     // Return:
 100     // Nothing
 101     Regs.w.ax = 0x1114;
 102     Regs.b.bl = 0;
 103     Int386(0x10, &Regs, &Regs);
 104 }
 105
 106 static VOID VideoSetTextCursorPosition(ULONG X, ULONG Y)
 107 {
 108 }
 109
 110 static ULONG VideoGetTextCursorPositionX(VOID)
 111 {
 112     REGS    Regs;
 113
 114     // Int 10h AH=03h
 115     // VIDEO - GET CURSOR POSITION AND SIZE
 116     //
 117     // AH = 03h
 118     // BH = page number
 119     // 0-3 in modes 2&3
 120     // 0-7 in modes 0&1
 121     // 0 in graphics modes
 122     // Return:
 123     // AX = 0000h (Phoenix BIOS)
 124     // CH = start scan line
 125     // CL = end scan line
 126     // DH = row (00h is top)
 127     // DL = column (00h is left)
 128     Regs.b.ah = 0x03;
 129     Regs.b.bh = 0x00;
 130     Int386(0x10, &Regs, &Regs);
 131
 132     return Regs.b.dl;
 133 }
 134
 135 static ULONG VideoGetTextCursorPositionY(VOID)
 136 {
 137     REGS    Regs;
 138
 139     // Int 10h AH=03h
 140     // VIDEO - GET CURSOR POSITION AND SIZE
 141     //
 142     // AH = 03h
 143     // BH = page number
 144     // 0-3 in modes 2&3
 145     // 0-7 in modes 0&1
 146     // 0 in graphics modes
 147     // Return:
 148     // AX = 0000h (Phoenix BIOS)
 149     // CH = start scan line
 150     // CL = end scan line
 151     // DH = row (00h is top)
 152     // DL = column (00h is left)
 153     Regs.b.ah = 0x03;
 154     Regs.b.bh = 0x00;
 155     Int386(0x10, &Regs, &Regs);
 156
 157     return Regs.b.dh;
 158 }
 159 #endif
 160
 161 USHORT BiosIsVesaSupported(VOID)
 162 {
 163     REGS            Regs;
 164     PVESA_SVGA_INFO    SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
 165     //USHORT*            VideoModes;
 166     //USHORT            Index;
 167
 168     TRACE("BiosIsVesaSupported()\n");
 169
 170     RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
 171
 172     // Make sure we receive version 2.0 info
 173     SvgaInfo->Signature[0] = 'V';
 174     SvgaInfo->Signature[1] = 'B';
 175     SvgaInfo->Signature[2] = 'E';
 176     SvgaInfo->Signature[3] = '2';
 177
 178     // Int 10h AX=4F00h
 179     // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
 180     //
 181     // AX = 4F00h
 182     // ES:DI -> buffer for SuperVGA information (see #00077)
 183     // Return:
 184     // AL = 4Fh if function supported
 185     // AH = status
 186     //   00h successful
 187     // ES:DI buffer filled
 188     //   01h failed
 189     //   ---VBE v2.0---
 190     //   02h function not supported by current hardware configuration
 191     //   03h function invalid in current video mode
 192     //
 193     // Determine whether VESA BIOS extensions are present and the
 194     // capabilities supported by the display adapter
 195     //
 196     // Installation check;VESA SuperVGA
 197     Regs.w.ax = 0x4F00;
 198     Regs.w.es = BIOSCALLBUFSEGMENT;
 199     Regs.w.di = BIOSCALLBUFOFFSET;
 200     Int386(0x10, &Regs, &Regs);
 201
 202     TRACE("AL = 0x%x\n", Regs.b.al);
 203     TRACE("AH = 0x%x\n", Regs.b.ah);
 204
 205     if (Regs.w.ax != 0x004F)
 206     {
 207         WARN("VBE Get SuperVGA information function not supported (AL=0x%x) or failed (AH=0x%x)\n",
 208              Regs.b.al, Regs.b.ah);
 209         return 0x0000;
 210     }
 211
 212     TRACE("Supported.\n");
 213     TRACE("SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]);
 214     TRACE("SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF));
 215     TRACE("SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr);
 216     TRACE("SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities);
 217     TRACE("SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64);
 218     TRACE("---VBE v2.0 ---\n");
 219     TRACE("SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo->OemSoftwareVersion >> 8) & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 12) & 0x0F) * 10), (SvgaInfo->OemSoftwareVersion & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 4) & 0x0F) * 10));
 220     TRACE("SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr);
 221     TRACE("SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr);
 222     TRACE("SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr);
 223     TRACE("SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version);
 224
 225     if (SvgaInfo->Signature[0] != 'V' ||
 226         SvgaInfo->Signature[1] != 'E' ||
 227         SvgaInfo->Signature[2] != 'S' ||
 228         SvgaInfo->Signature[3] != 'A')
 229     {
 230         ERR("Bad signature in VESA information (%c%c%c%c)\n",
 231             SvgaInfo->Signature[0],
 232             SvgaInfo->Signature[1],
 233             SvgaInfo->Signature[2],
 234             SvgaInfo->Signature[3]);
 235         return 0x0000;
 236     }
 237
 238     return SvgaInfo->VesaVersion;
 239 }
 240
 241
 242 BOOLEAN
 243 BiosIsVesaDdcSupported(VOID)
 244 {
 245     REGS Regs;
 246
 247     TRACE("BiosIsVesaDdcSupported()\n");
 248
 249     Regs.w.ax = 0x4F15;
 250     Regs.b.bl = 0;
 251     Regs.w.cx = 0;
 252     Regs.w.es = 0;
 253     Regs.w.di = 0;
 254     Int386(0x10, &Regs, &Regs);
 255
 256     TRACE("AL = 0x%x\n", Regs.b.al);
 257     TRACE("AH = 0x%x\n", Regs.b.ah);
 258
 259     TRACE("BL = 0x%x\n", Regs.b.bl);
 260
 261     if (Regs.w.ax != 0x004F)
 262     {
 263         WARN("VBE/DDC Installation check function not supported (AL=0x%x) or failed (AH=0x%x)\n",
 264              Regs.b.al, Regs.b.ah);
 265         return FALSE;
 266     }
 267
 268     return (Regs.b.ah == 0);
 269 }
 270
 271
 272 BOOLEAN
 273 BiosVesaReadEdid(VOID)
 274 {
 275     REGS Regs;
 276
 277     TRACE("BiosVesaReadEdid()\n");
 278
 279     RtlZeroMemory((PVOID)BIOSCALLBUFFER, 128);
 280
 281     Regs.w.ax = 0x4F15;
 282     Regs.b.bl = 1;
 283     Regs.w.cx = 0;
 284     Regs.w.dx = 0;
 285     Regs.w.es = BIOSCALLBUFSEGMENT;
 286     Regs.w.di = BIOSCALLBUFOFFSET;
 287     Int386(0x10, &Regs, &Regs);
 288
 289     TRACE("AL = 0x%x\n", Regs.b.al);
 290     TRACE("AH = 0x%x\n", Regs.b.ah);
 291
 292     if (Regs.w.ax != 0x004F)
 293     {
 294         WARN("VBE/DDC Read EDID function not supported (AL=0x%x) or failed (AH=0x%x)\n",
 295              Regs.b.al, Regs.b.ah);
 296         return FALSE;
 297     }
 298
 299     return (Regs.b.ah == 0);
 300 }
 301
 302 /* EOF */