[FREELDR] Formatting only.
[reactos.git] / 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 DBG_DEFAULT_CHANNEL(HWDETECT);
24
25 #include <pshpack2.h>
26 typedef struct
27 {
28 UCHAR Signature[4]; // (ret) signature ("VESA")
29 // (call) VESA 2.0 request signature ("VBE2"), required to receive
30 // version 2.0 info
31 USHORT VesaVersion; // VESA version number (one-digit minor version -- 0102h = v1.2)
32 ULONG OemNamePtr; // pointer to OEM name
33 // "761295520" for ATI
34 ULONG Capabilities; // capabilities flags (see #00078)
35 ULONG SupportedModeListPtr; // pointer to list of supported VESA and OEM video modes
36 // (list of words terminated with FFFFh)
37 USHORT TotalVideoMemory; // total amount of video memory in 64K blocks
38
39 // ---VBE v1.x ---
40 //UCHAR Reserved[236];
41
42 // ---VBE v2.0 ---
43 USHORT OemSoftwareVersion; // OEM software version (BCD, high byte = major, low byte = minor)
44 ULONG VendorNamePtr; // pointer to vendor name
45 ULONG ProductNamePtr; // pointer to product name
46 ULONG ProductRevisionStringPtr; // pointer to product revision string
47 USHORT VBE_AF_Version; // (if capabilities bit 3 set) VBE/AF version (BCD)
48 // 0100h for v1.0P
49 ULONG AcceleratedModeListPtr; // (if capabilities bit 3 set) pointer to list of supported
50 // accelerated video modes (list of words terminated with FFFFh)
51 UCHAR Reserved[216]; // reserved for VBE implementation
52 UCHAR ScratchPad[256]; // OEM scratchpad (for OEM strings, etc.)
53 } VESA_SVGA_INFO, *PVESA_SVGA_INFO;
54 #include <poppack.h>
55
56 // Bitfields for VESA capabilities:
57 //
58 // Bit(s) Description (Table 00078)
59 // 0 DAC can be switched into 8-bit mode
60 // 1 non-VGA controller
61 // 2 programmed DAC with blank bit (i.e. only during blanking interval)
62 // 3 (VBE v3.0) controller supports hardware stereoscopic signalling
63 // 3 controller supports VBE/AF v1.0P extensions
64 // 4 (VBE v3.0) if bit 3 set:
65 // =0 stereo signalling via external VESA stereo connector
66 // =1 stereo signalling via VESA EVC connector
67 // 4 (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
68 // 5 (VBE/AF v1.0P) controller supports hardware mouse cursor
69 // 6 (VBE/AF v1.0P) controller supports hardware clipping
70 // 7 (VBE/AF v1.0P) controller supports transparent BitBLT
71 // 8-31 reserved (0)
72
73 // Notes: The list of supported video modes is stored in the reserved
74 // portion of the SuperVGA information record by some implementations,
75 // and it may thus be necessary to either copy the mode list or use a
76 // different buffer for all subsequent VESA calls. Not all of the video
77 // modes in the list of mode numbers may be supported, e.g. if they require
78 // more memory than currently installed or are not supported by the
79 // attached monitor. Check any mode you intend to use through AX=4F01h first..
80 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
81 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
82 // the buffer should be 512 bytes. The S3 specific video modes will most
83 // likely follow the FFFFh terminator at the end of the standard modes.
84 // A search must then be made to find them, FFFFh will also terminate this
85 // second list. In some cases, only a "stub" VBE may be present, supporting
86 // only AX=4F00h; this case may be assumed if the list of supported video modes
87 // is empty (consisting of a single word of FFFFh)
88 #if 0
89 static VOID BiosSetVideoFont8x16(VOID)
90 {
91 REGS Regs;
92
93 // Int 10h AX=1114h
94 // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
95 //
96 // AX = 1114h
97 // BL = block to load
98 // Return:
99 // Nothing
100 Regs.w.ax = 0x1114;
101 Regs.b.bl = 0;
102 Int386(0x10, &Regs, &Regs);
103 }
104
105 static VOID VideoSetTextCursorPosition(ULONG X, ULONG Y)
106 {
107 }
108
109 static ULONG VideoGetTextCursorPositionX(VOID)
110 {
111 REGS Regs;
112
113 // Int 10h AH=03h
114 // VIDEO - GET CURSOR POSITION AND SIZE
115 //
116 // AH = 03h
117 // BH = page number
118 // 0-3 in modes 2&3
119 // 0-7 in modes 0&1
120 // 0 in graphics modes
121 // Return:
122 // AX = 0000h (Phoenix BIOS)
123 // CH = start scan line
124 // CL = end scan line
125 // DH = row (00h is top)
126 // DL = column (00h is left)
127 Regs.b.ah = 0x03;
128 Regs.b.bh = 0x00;
129 Int386(0x10, &Regs, &Regs);
130
131 return Regs.b.dl;
132 }
133
134 static ULONG VideoGetTextCursorPositionY(VOID)
135 {
136 REGS Regs;
137
138 // Int 10h AH=03h
139 // VIDEO - GET CURSOR POSITION AND SIZE
140 //
141 // AH = 03h
142 // BH = page number
143 // 0-3 in modes 2&3
144 // 0-7 in modes 0&1
145 // 0 in graphics modes
146 // Return:
147 // AX = 0000h (Phoenix BIOS)
148 // CH = start scan line
149 // CL = end scan line
150 // DH = row (00h is top)
151 // DL = column (00h is left)
152 Regs.b.ah = 0x03;
153 Regs.b.bh = 0x00;
154 Int386(0x10, &Regs, &Regs);
155
156 return Regs.b.dh;
157 }
158 #endif
159
160 USHORT BiosIsVesaSupported(VOID)
161 {
162 REGS Regs;
163 PVESA_SVGA_INFO SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
164 //USHORT* VideoModes;
165 //USHORT Index;
166
167 TRACE("BiosIsVesaSupported()\n");
168
169 RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
170
171 // Make sure we receive version 2.0 info
172 SvgaInfo->Signature[0] = 'V';
173 SvgaInfo->Signature[1] = 'B';
174 SvgaInfo->Signature[2] = 'E';
175 SvgaInfo->Signature[3] = '2';
176
177 // Int 10h AX=4F00h
178 // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
179 //
180 // AX = 4F00h
181 // ES:DI -> buffer for SuperVGA information (see #00077)
182 // Return:
183 // AL = 4Fh if function supported
184 // AH = status
185 // 00h successful
186 // ES:DI buffer filled
187 // 01h failed
188 // ---VBE v2.0---
189 // 02h function not supported by current hardware configuration
190 // 03h function invalid in current video mode
191 //
192 // Determine whether VESA BIOS extensions are present and the
193 // capabilities supported by the display adapter
194 //
195 // Installation check;VESA SuperVGA
196 Regs.w.ax = 0x4F00;
197 Regs.w.es = BIOSCALLBUFSEGMENT;
198 Regs.w.di = BIOSCALLBUFOFFSET;
199 Int386(0x10, &Regs, &Regs);
200
201 TRACE("AL = 0x%x\n", Regs.b.al);
202 TRACE("AH = 0x%x\n", Regs.b.ah);
203
204 if (Regs.w.ax != 0x004F)
205 {
206 WARN("VBE Get SuperVGA information function not supported (AL=0x%x) or failed (AH=0x%x)\n",
207 Regs.b.al, Regs.b.ah);
208 return 0x0000;
209 }
210
211 TRACE("Supported.\n");
212 TRACE("SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]);
213 TRACE("SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF));
214 TRACE("SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr);
215 TRACE("SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities);
216 TRACE("SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64);
217 TRACE("---VBE v2.0 ---\n");
218 TRACE("SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo->OemSoftwareVersion >> 8) & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 12) & 0x0F) * 10), (SvgaInfo->OemSoftwareVersion & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 4) & 0x0F) * 10));
219 TRACE("SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr);
220 TRACE("SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr);
221 TRACE("SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr);
222 TRACE("SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version);
223
224 if (SvgaInfo->Signature[0] != 'V' ||
225 SvgaInfo->Signature[1] != 'E' ||
226 SvgaInfo->Signature[2] != 'S' ||
227 SvgaInfo->Signature[3] != 'A')
228 {
229 ERR("Bad signature in VESA information (%c%c%c%c)\n",
230 SvgaInfo->Signature[0],
231 SvgaInfo->Signature[1],
232 SvgaInfo->Signature[2],
233 SvgaInfo->Signature[3]);
234 return 0x0000;
235 }
236
237 return SvgaInfo->VesaVersion;
238 }
239
240
241 BOOLEAN
242 BiosIsVesaDdcSupported(VOID)
243 {
244 REGS Regs;
245
246 TRACE("BiosIsVesaDdcSupported()\n");
247
248 Regs.w.ax = 0x4F15;
249 Regs.b.bl = 0;
250 Regs.w.cx = 0;
251 Regs.w.es = 0;
252 Regs.w.di = 0;
253 Int386(0x10, &Regs, &Regs);
254
255 TRACE("AL = 0x%x\n", Regs.b.al);
256 TRACE("AH = 0x%x\n", Regs.b.ah);
257
258 TRACE("BL = 0x%x\n", Regs.b.bl);
259
260 if (Regs.w.ax != 0x004F)
261 {
262 WARN("VBE/DDC Installation check function not supported (AL=0x%x) or failed (AH=0x%x)\n",
263 Regs.b.al, Regs.b.ah);
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 WARN("VBE/DDC Read EDID function not supported (AL=0x%x) or failed (AH=0x%x)\n",
294 Regs.b.al, Regs.b.ah);
295 return FALSE;
296 }
297
298 return (Regs.b.ah == 0);
299 }
300
301 /* EOF */