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 #define NDEBUG
  23 #include <debug.h>
  24
  25 DBG_DEFAULT_CHANNEL(HWDETECT);
  26
  27 #include <pshpack2.h>
  28 typedef struct
  29 {
  30     UCHAR    Signature[4];                // (ret) signature ("VESA")
  31                                     // (call) VESA 2.0 request signature ("VBE2"), required to receive
  32                                     // version 2.0 info
  33     USHORT    VesaVersion;                // VESA version number (one-digit minor version -- 0102h = v1.2)
  34     ULONG OemNamePtr;                    // pointer to OEM name
  35                                     // "761295520" for ATI
  36     ULONG    Capabilities;                // capabilities flags (see #00078)
  37     ULONG    SupportedModeListPtr;        // pointer to list of supported VESA and OEM video modes
  38                                     // (list of words terminated with FFFFh)
  39     USHORT    TotalVideoMemory;            // total amount of video memory in 64K blocks
  40
  41     // ---VBE v1.x ---
  42     //UCHAR    Reserved[236];
  43
  44     // ---VBE v2.0 ---
  45     USHORT    OemSoftwareVersion;            // OEM software version (BCD, high byte = major, low byte = minor)
  46     ULONG    VendorNamePtr;                // pointer to vendor name
  47     ULONG    ProductNamePtr;                // pointer to product name
  48     ULONG    ProductRevisionStringPtr;    // pointer to product revision string
  49     USHORT    VBE_AF_Version;                // (if capabilities bit 3 set) VBE/AF version (BCD)
  50                                     // 0100h for v1.0P
  51     ULONG    AcceleratedModeListPtr;        // (if capabilities bit 3 set) pointer to list of supported
  52                                     // accelerated video modes (list of words terminated with FFFFh)
  53     UCHAR    Reserved[216];                // reserved for VBE implementation
  54     UCHAR    ScratchPad[256];            // OEM scratchpad (for OEM strings, etc.)
  55 } VESA_SVGA_INFO, *PVESA_SVGA_INFO;
  56 #include <poppack.h>
  57
  58 // Bitfields for VESA capabilities:
  59 //
  60 // Bit(s)  Description     (Table 00078)
  61 // 0      DAC can be switched into 8-bit mode
  62 // 1      non-VGA controller
  63 // 2      programmed DAC with blank bit (i.e. only during blanking interval)
  64 // 3      (VBE v3.0) controller supports hardware stereoscopic signalling
  65 // 3      controller supports VBE/AF v1.0P extensions
  66 // 4      (VBE v3.0) if bit 3 set:
  67 // =0 stereo signalling via external VESA stereo connector
  68 // =1 stereo signalling via VESA EVC connector
  69 // 4      (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
  70 // 5      (VBE/AF v1.0P) controller supports hardware mouse cursor
  71 // 6      (VBE/AF v1.0P) controller supports hardware clipping
  72 // 7      (VBE/AF v1.0P) controller supports transparent BitBLT
  73 // 8-31   reserved (0)
  74
  75 // Notes: The list of supported video modes is stored in the reserved
  76 // portion of the SuperVGA information record by some implementations,
  77 // and it may thus be necessary to either copy the mode list or use a
  78 // different buffer for all subsequent VESA calls. Not all of the video
  79 // modes in the list of mode numbers may be supported, e.g. if they require
  80 // more memory than currently installed or are not supported by the
  81 // attached monitor. Check any mode you intend to use through AX=4F01h first..
  82 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
  83 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
  84 // the buffer should be 512 bytes. The S3 specific video modes will most
  85 // likely follow the FFFFh terminator at the end of the standard modes.
  86 // A search must then be made to find them, FFFFh will also terminate this
  87 // second list. In some cases, only a "stub" VBE may be present, supporting
  88 // only AX=4F00h; this case may be assumed if the list of supported video modes
  89 // is empty (consisting of a single word of FFFFh)
  90 #if 0
  91 static VOID BiosSetVideoFont8x16(VOID)
  92 {
  93     REGS    Regs;
  94
  95     // Int 10h AX=1114h
  96     // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
  97     //
  98     // AX = 1114h
  99     // BL = block to load
 100     // Return:
 101     // Nothing
 102     Regs.w.ax = 0x1114;
 103     Regs.b.bl = 0;
 104     Int386(0x10, &Regs, &Regs);
 105 }
 106
 107 static VOID VideoSetTextCursorPosition(ULONG X, ULONG Y)
 108 {
 109 }
 110
 111 static ULONG VideoGetTextCursorPositionX(VOID)
 112 {
 113     REGS    Regs;
 114
 115     // Int 10h AH=03h
 116     // VIDEO - GET CURSOR POSITION AND SIZE
 117     //
 118     // AH = 03h
 119     // BH = page number
 120     // 0-3 in modes 2&3
 121     // 0-7 in modes 0&1
 122     // 0 in graphics modes
 123     // Return:
 124     // AX = 0000h (Phoenix BIOS)
 125     // CH = start scan line
 126     // CL = end scan line
 127     // DH = row (00h is top)
 128     // DL = column (00h is left)
 129     Regs.b.ah = 0x03;
 130     Regs.b.bh = 0x00;
 131     Int386(0x10, &Regs, &Regs);
 132
 133     return Regs.b.dl;
 134 }
 135
 136 static ULONG VideoGetTextCursorPositionY(VOID)
 137 {
 138     REGS    Regs;
 139
 140     // Int 10h AH=03h
 141     // VIDEO - GET CURSOR POSITION AND SIZE
 142     //
 143     // AH = 03h
 144     // BH = page number
 145     // 0-3 in modes 2&3
 146     // 0-7 in modes 0&1
 147     // 0 in graphics modes
 148     // Return:
 149     // AX = 0000h (Phoenix BIOS)
 150     // CH = start scan line
 151     // CL = end scan line
 152     // DH = row (00h is top)
 153     // DL = column (00h is left)
 154     Regs.b.ah = 0x03;
 155     Regs.b.bh = 0x00;
 156     Int386(0x10, &Regs, &Regs);
 157
 158     return Regs.b.dh;
 159 }
 160 #endif
 161
 162 USHORT BiosIsVesaSupported(VOID)
 163 {
 164     REGS            Regs;
 165     PVESA_SVGA_INFO    SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
 166     //USHORT*            VideoModes;
 167     //USHORT            Index;
 168
 169     TRACE("BiosIsVesaSupported()\n");
 170
 171     RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
 172
 173     // Make sure we receive version 2.0 info
 174     SvgaInfo->Signature[0] = 'V';
 175     SvgaInfo->Signature[1] = 'B';
 176     SvgaInfo->Signature[2] = 'E';
 177     SvgaInfo->Signature[3] = '2';
 178
 179     // Int 10h AX=4F00h
 180     // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
 181     //
 182     // AX = 4F00h
 183     // ES:DI -> buffer for SuperVGA information (see #00077)
 184     // Return:
 185     // AL = 4Fh if function supported
 186     // AH = status
 187     //   00h successful
 188     // ES:DI buffer filled
 189     //   01h failed
 190     //   ---VBE v2.0---
 191     //   02h function not supported by current hardware configuration
 192     //   03h function invalid in current video mode
 193     //
 194     // Determine whether VESA BIOS extensions are present and the
 195     // capabilities supported by the display adapter
 196     //
 197     // Installation check;VESA SuperVGA
 198     Regs.w.ax = 0x4F00;
 199     Regs.w.es = BIOSCALLBUFSEGMENT;
 200     Regs.w.di = BIOSCALLBUFOFFSET;
 201     Int386(0x10, &Regs, &Regs);
 202
 203     TRACE("AL = 0x%x\n", Regs.b.al);
 204     TRACE("AH = 0x%x\n", Regs.b.ah);
 205
 206     if (Regs.w.ax != 0x004F)
 207     {
 208         ERR("VESA BIOS call failed\n");
 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         ERR("VESA/DDC installation check failed\n");
 264         return FALSE;
 265     }
 266
 267     return (Regs.b.ah == 0);
 268 }
 269
 270
 271 BOOLEAN
 272 BiosVesaReadEdid(VOID)
 273 {
 274     REGS Regs;
 275
 276     TRACE("BiosVesaReadEdid()\n");
 277
 278     RtlZeroMemory((PVOID)BIOSCALLBUFFER, 128);
 279
 280     Regs.w.ax = 0x4F15;
 281     Regs.b.bl = 1;
 282     Regs.w.cx = 0;
 283     Regs.w.dx = 0;
 284     Regs.w.es = BIOSCALLBUFSEGMENT;
 285     Regs.w.di = BIOSCALLBUFOFFSET;
 286     Int386(0x10, &Regs, &Regs);
 287
 288     TRACE("AL = 0x%x\n", Regs.b.al);
 289     TRACE("AH = 0x%x\n", Regs.b.ah);
 290
 291     if (Regs.w.ax != 0x004F)
 292     {
 293         ERR("Read EDID function not supported!\n");
 294         return FALSE;
 295     }
 296
 297     return (Regs.b.ah == 0);
 298 }
 299
 300 /* EOF */