Chameleon

Chameleon Svn Source Tree

Root/branches/meklortOld/i386/libsaio/vbe.c

Source at commit 1146 created 12 years 10 months ago.
By azimutz, Sync with trunk (r1145). Add nVidia dev id's, 0DF4 for "GeForce GT 450M" (issue 99) and 1251 for "GeForce GTX 560M" (thanks to oSxFr33k for testing).
1/*␊
2 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_LICENSE_HEADER_START@␊
5 * ␊
6 * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊
7 * Reserved. This file contains Original Code and/or Modifications of␊
8 * Original Code as defined in and that are subject to the Apple Public␊
9 * Source License Version 2.0 (the "License"). You may not use this file␊
10 * except in compliance with the License. Please obtain a copy of the␊
11 * License at http://www.apple.com/publicsource and read it before using␊
12 * this file.␊
13 * ␊
14 * The Original Code and all software distributed under the License are␊
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊
19 * License for the specific language governing rights and limitations␊
20 * under the License.␊
21 * ␊
22 * @APPLE_LICENSE_HEADER_END@␊
23 */␊
24/*␊
25 * Copyright 1993 NeXT, Inc.␊
26 * All rights reserved.␊
27 */␊
28␊
29#include "libsaio.h"␊
30#include "vbe.h"␊
31␊
32/*␊
33 * Globals␊
34 */␊
35static biosBuf_t bb;␊
36␊
37int getVBEInfo( void * infoBlock )␊
38{␊
39 bb.intno = 0x10;␊
40 bb.eax.rr = funcGetControllerInfo;␊
41 bb.es = SEG( infoBlock );␊
42 bb.edi.rr = OFF( infoBlock );␊
43 bios( &bb );␊
44 return(bb.eax.r.h);␊
45}␊
46␊
47int getVBEModeInfo( int mode, void * minfo_p )␊
48{␊
49 bb.intno = 0x10;␊
50 bb.eax.rr = funcGetModeInfo;␊
51 bb.ecx.rr = mode;␊
52 bb.es = SEG(minfo_p);␊
53 bb.edi.rr = OFF(minfo_p);␊
54 bios(&bb);␊
55 return(bb.eax.r.h);␊
56}␊
57#if UNUSED␊
58int getVBEDACFormat(unsigned char *format)␊
59{␊
60 bb.intno = 0x10;␊
61 bb.eax.rr = funcGetSetPaletteFormat;␊
62 bb.ebx.r.l = subfuncGet;␊
63 bios(&bb);␊
64 *format = bb.ebx.r.h;␊
65 return(bb.eax.r.h);␊
66}␊
67␊
68int setVBEDACFormat(unsigned char format)␊
69{␊
70 bb.intno = 0x10;␊
71 bb.eax.rr = funcGetSetPaletteFormat;␊
72 bb.ebx.r.l = subfuncSet;␊
73 bb.ebx.r.h = format;␊
74 bios(&bb);␊
75 return(bb.eax.r.h);␊
76}␊
77#endif␊
78␊
79int getEDID( void * edidBlock, UInt8 block)␊
80{␊
81␉bzero(&bb, sizeof(bb));␊
82 bb.intno = 0x10;␊
83 bb.eax.rr = funcGetEDID;␊
84␉bb.ebx.r.l= 0x01;␊
85␉bb.edx.rr = block;␊
86␉␊
87 bb.es = SEG( edidBlock );␊
88 bb.edi.rr = OFF( edidBlock );␊
89␉␊
90 bios( &bb );␊
91 return(bb.eax.r.h);␊
92}␊
93␊
94␊
95␊
96/*␊
97 * Default GTF parameter values.␊
98 */␊
99#define kCellGranularity 8.0 // character cell granularity␊
100#define kMinVSyncPlusBP 550.0 // min VSync + BP interval (us)␊
101#define kMinFrontPorch 1.0 // minimum front porch in lines(V)/cells(H)␊
102#define kVSyncLines 3.0 // width of VSync in lines␊
103#define kHSyncWidth 8.0 // HSync as a percent of total line width␊
104#define kC 30.0 // C = (C'-J) * (K/256) + J␊
105#define kM 300.0 // M = K/256 * M'␊
106␊
107int Round(double f)␊
108{␊
109␉return (int)(f + 0.5);␊
110}␊
111␊
112/*␊
113 * from http://www.azillionmonkeys.com/qed/sqroot.html␊
114 */␊
115#if UNUSED␊
116double Sqrt( double y )␊
117{␊
118␉double x, z, tempf;␊
119␉unsigned long *tfptr = ((unsigned long *)&tempf) + 1;␊
120␉␊
121␉tempf = y;␊
122␉*tfptr = (0xbfcdd90a - *tfptr)>>1; /* estimate of 1/sqrt(y) */␊
123␉x = tempf;␊
124␉z = y*0.5; /* hoist out the “/2” */␊
125␉x = (1.5*x) - (x*x)*(x*z); /* iteration formula */␊
126␉x = (1.5*x) - (x*x)*(x*z);␊
127␉x = (1.5*x) - (x*x)*(x*z);␊
128␉x = (1.5*x) - (x*x)*(x*z);␊
129␉x = (1.5*x) - (x*x)*(x*z);␊
130␉return x*y;␊
131}␊
132␊
133int generateCRTCTiming( unsigned short width,␊
134 unsigned short height,␊
135 unsigned long paramValue, ␊
136 int paramType,␊
137 VBECRTCInfoBlock * timing )␊
138{␊
139 double h_period_est, h_freq, h_period, h_total_pixels, h_sync_pixels;␊
140 double h_active_pixels, h_ideal_duty_cycle, h_blank_pixels, pixel_freq = 0;␊
141 double v_sync_plus_bp = 0, v_total_lines = 0, v_field_rate_est, v_frame_rate = 0;␊
142 const double h_pixels = (double) width;␊
143 const double v_lines = (double) height;␊
144␊
145 enum {␊
146 left_margin_pixels = 0,␊
147 right_margin_pixels = 0,␊
148 top_margin_lines = 0,␊
149 bot_margin_lines = 0,␊
150 interlace = 0␊
151 };␊
152␊
153 // Total number of active pixels in image and both margins␊
154 h_active_pixels = h_pixels + left_margin_pixels + right_margin_pixels;␊
155␊
156 if (paramType == kCRTCParamPixelClock)␊
157 {␊
158 // Pixel clock provided in MHz␊
159 pixel_freq = (double) paramValue / 1000000;␊
160␊
161 // Ideal horizontal period from the blanking duty cycle equation␊
162 h_period = ((kC - 100) + (Sqrt(((100 - kC) * (100 - kC)) + (0.4 * kM *␊
163 (h_active_pixels + right_margin_pixels + left_margin_pixels) /␊
164 pixel_freq)))) / 2.0 / kM * 1000;␊
165 }␊
166 else /* kCRTCParamRefreshRate */␊
167 {␊
168 double v_field_rate_in = (double) paramValue;␊
169␊
170 // Estimate the horizontal period␊
171 h_period_est = ((1 / v_field_rate_in) - kMinVSyncPlusBP / 1000000) /␊
172 (v_lines + (2 * top_margin_lines) + kMinFrontPorch + interlace) * ␊
173 1000000;␊
174␊
175 // Number of lines in Vsync + back porch␊
176 v_sync_plus_bp = Round(kMinVSyncPlusBP / h_period_est);␊
177␊
178 // Total number of lines in Vetical field period␊
179 v_total_lines = v_lines + top_margin_lines + bot_margin_lines +␊
180 v_sync_plus_bp + interlace + kMinFrontPorch;␊
181␊
182 // Estimate the vertical field frequency␊
183 v_field_rate_est = 1 / h_period_est / v_total_lines * 1000000;␊
184␊
185 // Find the actual horizontal period␊
186 h_period = h_period_est / (v_field_rate_in / v_field_rate_est);␊
187␊
188 // Find the vertical frame rate (no interlace)␊
189 v_frame_rate = 1 / h_period / v_total_lines * 1000000;␊
190 }␊
191␊
192 // Ideal blanking duty cycle from the blanking duty cycle equation␊
193 h_ideal_duty_cycle = kC - (kM * h_period / 1000);␊
194␊
195 // Number of pixels in the blanking time to the nearest double character cell␊
196 h_blank_pixels = Round(h_active_pixels * h_ideal_duty_cycle /␊
197 (100 - h_ideal_duty_cycle) / (2 * kCellGranularity)) *␊
198 (2 * kCellGranularity);␊
199␊
200 // Total number of horizontal pixels␊
201 h_total_pixels = h_active_pixels + h_blank_pixels;␊
202␊
203 if (paramType == kCRTCParamPixelClock)␊
204 {␊
205 // Horizontal frequency␊
206 h_freq = pixel_freq / h_total_pixels * 1000;␊
207␊
208 // Number of lines in V sync + back porch␊
209 v_sync_plus_bp = Round(kMinVSyncPlusBP * h_freq / 1000);␊
210␊
211 // Total number of lines in vertical field period␊
212 v_total_lines = v_lines + top_margin_lines + bot_margin_lines +␊
213 interlace + v_sync_plus_bp + kMinFrontPorch;␊
214␊
215 // Vertical frame frequency␊
216 v_frame_rate = Round(h_freq / v_total_lines * 1000);␊
217 }␊
218 else␊
219 {␊
220 // Find pixel clock frequency␊
221 pixel_freq = Round(h_total_pixels / h_period);␊
222 }␊
223␊
224 h_sync_pixels = Round(h_total_pixels * kHSyncWidth / 100 / kCellGranularity) *␊
225 kCellGranularity;␊
226␊
227 timing->HTotal = h_total_pixels;␊
228 timing->HSyncStart = h_active_pixels + (h_blank_pixels / 2) - h_sync_pixels;␊
229 timing->HSyncEnd = timing->HSyncStart + h_sync_pixels;␊
230 timing->VTotal = v_total_lines;␊
231 timing->VSyncStart = v_total_lines - v_sync_plus_bp;␊
232 timing->VSyncEnd = timing->VSyncStart + kVSyncLines;␊
233 timing->Flags = kCRTCNegativeHorizontalSync;␊
234 timing->PixelClock = pixel_freq * 1000000;␊
235 timing->RefreshRate = v_frame_rate * 100;␊
236␊
237 return 0;␊
238}␊
239␊
240#endif ␊
241␊
242int setVBEMode(unsigned short mode, const VBECRTCInfoBlock * timing)␊
243{␊
244 bb.intno = 0x10;␊
245 bb.eax.rr = funcSetMode;␊
246 bb.ebx.rr = mode;␊
247 if (timing) {␊
248 bb.es = SEG(timing);␊
249 bb.edi.rr = OFF(timing);␊
250 }␊
251 bios(&bb);␊
252 return(bb.eax.r.h);␊
253}␊
254␊
255␊
256int setVBEPalette(void *palette)␊
257{␊
258 bb.intno = 0x10;␊
259 bb.eax.rr = funcGetSetPaletteData;␊
260 bb.ebx.r.l = subfuncSet;␊
261 bb.ecx.rr = 256;␊
262 bb.edx.rr = 0;␊
263 bb.es = SEG(palette);␊
264 bb.edi.rr = OFF(palette);␊
265 bios(&bb);␊
266 return(bb.eax.r.h);␊
267}␊
268␊
269#if UNUSED␊
270␊
271int getVBEPalette(void *palette)␊
272{␊
273 bb.intno = 0x10;␊
274 bb.eax.rr = funcGetSetPaletteData;␊
275 bb.ebx.r.l = subfuncGet;␊
276 bb.ecx.rr = 256;␊
277 bb.edx.rr = 0;␊
278 bb.es = SEG(palette);␊
279 bb.edi.rr = OFF(palette);␊
280 bios(&bb);␊
281 return(bb.eax.r.h);␊
282}␊
283␊
284int getVBECurrentMode(unsigned short *mode)␊
285{␊
286 bb.intno = 0x10;␊
287 bb.eax.rr = funcGetCurrentMode;␊
288 bios(&bb);␊
289 *mode = bb.ebx.rr;␊
290 return(bb.eax.r.h);␊
291}␊
292␊
293int getVBEPixelClock(unsigned short mode, unsigned long * pixelClock)␊
294{␊
295 bb.intno = 0x10;␊
296 bb.eax.rr = funcGetSetPixelClock;␊
297 bb.ebx.r.l = 0;␊
298 bb.ecx.rx = *pixelClock;␊
299 bb.edx.rr = mode;␊
300 bios(&bb);␊
301 *pixelClock = bb.ecx.rx;␊
302 return(bb.eax.r.h);␊
303}␊
304#endif␊
305

Archive Download this file

Revision: 1146