1 /*
2 * linux/drivers/video/macmodes.c -- Standard MacOS video modes
3 *
4 * Copyright (C) 1998 Geert Uytterhoeven
5 *
6 * 2000 - Removal of OpenFirmware dependencies by:
7 * - Ani Joshi
8 * - Brad Douglas <brad@neruo.com>
9 *
10 * 2001 - Documented with DocBook
11 * - Brad Douglas <brad@neruo.com>
12 *
13 * This file is subject to the terms and conditions of the GNU General Public
14 * License. See the file COPYING in the main directory of this archive for
15 * more details.
16 */
17
18 #include <linux/errno.h>
19 #include <linux/fb.h>
20 #include <linux/string.h>
21 #include <linux/module.h>
22
23 #include "macmodes.h"
24
25 /*
26 * MacOS video mode definitions
27 *
28 * Order IS important! If you change these, don't forget to update
29 * mac_modes[] below!
30 */
31
32 #define DEFAULT_MODEDB_INDEX 0
33
34 static const struct fb_videomode mac_modedb[] = {
35 {
36 /* 512x384, 60Hz, Non-Interlaced (15.67 MHz dot clock) */
37 "mac2", 60, 512, 384, 63828, 80, 16, 19, 1, 32, 3,
38 0, FB_VMODE_NONINTERLACED
39 }, {
40 /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
41 "mac5", 60, 640, 480, 39722, 32, 32, 33, 10, 96, 2,
42 0, FB_VMODE_NONINTERLACED
43 }, {
44 /* 640x480, 67Hz, Non-Interlaced (30.0 MHz dotclock) */
45 "mac6", 67, 640, 480, 33334, 80, 80, 39, 3, 64, 3,
46 0, FB_VMODE_NONINTERLACED
47 }, {
48 /* 640x870, 75Hz (portrait), Non-Interlaced (57.28 MHz dot clock) */
49 "mac7", 75, 640, 870, 17457, 80, 32, 42, 3, 80, 3,
50 0, FB_VMODE_NONINTERLACED
51 }, {
52 /* 800x600, 56 Hz, Non-Interlaced (36.00 MHz dotclock) */
53 "mac9", 56, 800, 600, 27778, 112, 40, 22, 1, 72, 2,
54 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
55 }, {
56 /* 800x600, 60 Hz, Non-Interlaced (40.00 MHz dotclock) */
57 "mac10", 60, 800, 600, 25000, 72, 56, 23, 1, 128, 4,
58 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
59 }, {
60 /* 800x600, 72 Hz, Non-Interlaced (50.00 MHz dotclock) */
61 "mac11", 72, 800, 600, 20000, 48, 72, 23, 37, 120, 6,
62 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
63 }, {
64 /* 800x600, 75 Hz, Non-Interlaced (49.50 MHz dotclock) */
65 "mac12", 75, 800, 600, 20203, 144, 32, 21, 1, 80, 3,
66 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
67 }, {
68 /* 832x624, 75Hz, Non-Interlaced (57.6 MHz dotclock) */
69 "mac13", 75, 832, 624, 17362, 208, 48, 39, 1, 64, 3,
70 0, FB_VMODE_NONINTERLACED
71 }, {
72 /* 1024x768, 60 Hz, Non-Interlaced (65.00 MHz dotclock) */
73 "mac14", 60, 1024, 768, 15385, 144, 40, 29, 3, 136, 6,
74 0, FB_VMODE_NONINTERLACED
75 }, {
76 /* 1024x768, 72 Hz, Non-Interlaced (75.00 MHz dotclock) */
77 "mac15", 72, 1024, 768, 13334, 128, 40, 29, 3, 136, 6,
78 0, FB_VMODE_NONINTERLACED
79 }, {
80 /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
81 "mac16", 75, 1024, 768, 12699, 176, 16, 28, 1, 96, 3,
82 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
83 }, {
84 /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
85 "mac17", 75, 1024, 768, 12699, 160, 32, 28, 1, 96, 3,
86 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
87 }, {
88 /* 1152x870, 75 Hz, Non-Interlaced (100.0 MHz dotclock) */
89 "mac18", 75, 1152, 870, 10000, 128, 48, 39, 3, 128, 3,
90 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
91 }, {
92 /* 1280x960, 75 Hz, Non-Interlaced (126.00 MHz dotclock) */
93 "mac19", 75, 1280, 960, 7937, 224, 32, 36, 1, 144, 3,
94 0, FB_VMODE_NONINTERLACED
95 }, {
96 /* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
97 "mac20", 75, 1280, 1024, 7408, 232, 64, 38, 1, 112, 3,
98 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
99 }, {
100 /* 1152x768, 60 Hz, Titanium PowerBook */
101 "mac21", 60, 1152, 768, 15386, 158, 26, 29, 3, 136, 6,
102 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
103 }, {
104 /* 1600x1024, 60 Hz, Non-Interlaced (112.27 MHz dotclock) */
105 "mac22", 60, 1600, 1024, 8908, 88, 104, 1, 10, 16, 1,
106 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
107 }
108
109 #if 0
110 /* Anyone who has timings for these? */
111 {
112 /* VMODE_512_384_60I: 512x384, 60Hz, Interlaced (NTSC) */
113 "mac1", 60, 512, 384, pixclock, left, right, upper, lower, hslen, vslen,
114 sync, FB_VMODE_INTERLACED
115 }, {
116 /* VMODE_640_480_50I: 640x480, 50Hz, Interlaced (PAL) */
117 "mac3", 50, 640, 480, pixclock, left, right, upper, lower, hslen, vslen,
118 sync, FB_VMODE_INTERLACED
119 }, {
120 /* VMODE_640_480_60I: 640x480, 60Hz, Interlaced (NTSC) */
121 "mac4", 60, 640, 480, pixclock, left, right, upper, lower, hslen, vslen,
122 sync, FB_VMODE_INTERLACED
123 }, {
124 /* VMODE_768_576_50I: 768x576, 50Hz (PAL full frame), Interlaced */
125 "mac8", 50, 768, 576, pixclock, left, right, upper, lower, hslen, vslen,
126 sync, FB_VMODE_INTERLACED
127 },
128 #endif
129 };
130
131
132 /*
133 * Mapping between MacOS video mode numbers and video mode definitions
134 *
135 * These MUST be ordered in
136 * - increasing resolution
137 * - decreasing pixel clock period
138 */
139
140 static const struct mode_map {
141 int vmode;
142 const struct fb_videomode *mode;
143 } mac_modes[] = {
144 /* 512x384 */
145 { VMODE_512_384_60, &mac_modedb[0] },
146 /* 640x480 */
147 { VMODE_640_480_60, &mac_modedb[1] },
148 { VMODE_640_480_67, &mac_modedb[2] },
149 /* 640x870 */
150 { VMODE_640_870_75P, &mac_modedb[3] },
151 /* 800x600 */
152 { VMODE_800_600_56, &mac_modedb[4] },
153 { VMODE_800_600_60, &mac_modedb[5] },
154 { VMODE_800_600_75, &mac_modedb[7] },
155 { VMODE_800_600_72, &mac_modedb[6] },
156 /* 832x624 */
157 { VMODE_832_624_75, &mac_modedb[8] },
158 /* 1024x768 */
159 { VMODE_1024_768_60, &mac_modedb[9] },
160 { VMODE_1024_768_70, &mac_modedb[10] },
161 { VMODE_1024_768_75V, &mac_modedb[11] },
162 { VMODE_1024_768_75, &mac_modedb[12] },
163 /* 1152x768 */
164 { VMODE_1152_768_60, &mac_modedb[16] },
165 /* 1152x870 */
166 { VMODE_1152_870_75, &mac_modedb[13] },
167 /* 1280x960 */
168 { VMODE_1280_960_75, &mac_modedb[14] },
169 /* 1280x1024 */
170 { VMODE_1280_1024_75, &mac_modedb[15] },
171 /* 1600x1024 */
172 { VMODE_1600_1024_60, &mac_modedb[17] },
173 { -1, NULL }
174 };
175
176
177 /*
178 * Mapping between monitor sense values and MacOS video mode numbers
179 */
180
181 static const struct monitor_map {
182 int sense;
183 int vmode;
184 } mac_monitors[] = {
185 { 0x000, VMODE_1280_1024_75 }, /* 21" RGB */
186 { 0x114, VMODE_640_870_75P }, /* Portrait Monochrome */
187 { 0x221, VMODE_512_384_60 }, /* 12" RGB*/
188 { 0x331, VMODE_1280_1024_75 }, /* 21" RGB (Radius) */
189 { 0x334, VMODE_1280_1024_75 }, /* 21" mono (Radius) */
190 { 0x335, VMODE_1280_1024_75 }, /* 21" mono */
191 { 0x40A, VMODE_640_480_60I }, /* NTSC */
192 { 0x51E, VMODE_640_870_75P }, /* Portrait RGB */
193 { 0x603, VMODE_832_624_75 }, /* 12"-16" multiscan */
194 { 0x60b, VMODE_1024_768_70 }, /* 13"-19" multiscan */
195 { 0x623, VMODE_1152_870_75 }, /* 13"-21" multiscan */
196 { 0x62b, VMODE_640_480_67 }, /* 13"/14" RGB */
197 { 0x700, VMODE_640_480_50I }, /* PAL */
198 { 0x714, VMODE_640_480_60I }, /* NTSC */
199 { 0x717, VMODE_800_600_75 }, /* VGA */
200 { 0x72d, VMODE_832_624_75 }, /* 16" RGB (Goldfish) */
201 { 0x730, VMODE_768_576_50I }, /* PAL (Alternate) */
202 { 0x73a, VMODE_1152_870_75 }, /* 3rd party 19" */
203 { 0x73f, VMODE_640_480_67 }, /* no sense lines connected at all */
204 { 0xBEEF, VMODE_1600_1024_60 }, /* 22" Apple Cinema Display */
205 { -1, VMODE_640_480_60 }, /* catch-all, must be last */
206 };
207
208 /**
209 * mac_vmode_to_var - converts vmode/cmode pair to var structure
210 * @vmode: MacOS video mode
211 * @cmode: MacOS color mode
212 * @var: frame buffer video mode structure
213 *
214 * Converts a MacOS vmode/cmode pair to a frame buffer video
215 * mode structure.
216 *
217 * Returns negative errno on error, or zero for success.
218 *
219 */
220
mac_vmode_to_var(int vmode,int cmode,struct fb_var_screeninfo * var)221 int mac_vmode_to_var(int vmode, int cmode, struct fb_var_screeninfo *var)
222 {
223 const struct fb_videomode *mode = NULL;
224 const struct mode_map *map;
225
226 for (map = mac_modes; map->vmode != -1; map++)
227 if (map->vmode == vmode) {
228 mode = map->mode;
229 break;
230 }
231 if (!mode)
232 return -EINVAL;
233
234 memset(var, 0, sizeof(struct fb_var_screeninfo));
235 switch (cmode) {
236 case CMODE_8:
237 var->bits_per_pixel = 8;
238 var->red.offset = 0;
239 var->red.length = 8;
240 var->green.offset = 0;
241 var->green.length = 8;
242 var->blue.offset = 0;
243 var->blue.length = 8;
244 break;
245
246 case CMODE_16:
247 var->bits_per_pixel = 16;
248 var->red.offset = 10;
249 var->red.length = 5;
250 var->green.offset = 5;
251 var->green.length = 5;
252 var->blue.offset = 0;
253 var->blue.length = 5;
254 break;
255
256 case CMODE_32:
257 var->bits_per_pixel = 32;
258 var->red.offset = 16;
259 var->red.length = 8;
260 var->green.offset = 8;
261 var->green.length = 8;
262 var->blue.offset = 0;
263 var->blue.length = 8;
264 var->transp.offset = 24;
265 var->transp.length = 8;
266 break;
267
268 default:
269 return -EINVAL;
270 }
271 var->xres = mode->xres;
272 var->yres = mode->yres;
273 var->xres_virtual = mode->xres;
274 var->yres_virtual = mode->yres;
275 var->height = -1;
276 var->width = -1;
277 var->pixclock = mode->pixclock;
278 var->left_margin = mode->left_margin;
279 var->right_margin = mode->right_margin;
280 var->upper_margin = mode->upper_margin;
281 var->lower_margin = mode->lower_margin;
282 var->hsync_len = mode->hsync_len;
283 var->vsync_len = mode->vsync_len;
284 var->sync = mode->sync;
285 var->vmode = mode->vmode;
286 return 0;
287 }
288 EXPORT_SYMBOL(mac_vmode_to_var);
289
290 /**
291 * mac_var_to_vmode - convert var structure to MacOS vmode/cmode pair
292 * @var: frame buffer video mode structure
293 * @vmode: MacOS video mode
294 * @cmode: MacOS color mode
295 *
296 * Converts a frame buffer video mode structure to a MacOS
297 * vmode/cmode pair.
298 *
299 * Returns negative errno on error, or zero for success.
300 *
301 */
302
mac_var_to_vmode(const struct fb_var_screeninfo * var,int * vmode,int * cmode)303 int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode,
304 int *cmode)
305 {
306 const struct mode_map *map;
307
308 if (var->bits_per_pixel <= 8)
309 *cmode = CMODE_8;
310 else if (var->bits_per_pixel <= 16)
311 *cmode = CMODE_16;
312 else if (var->bits_per_pixel <= 32)
313 *cmode = CMODE_32;
314 else
315 return -EINVAL;
316
317 /*
318 * Find the mac_mode with a matching resolution or failing that, the
319 * closest larger resolution. Skip modes with a shorter pixel clock period.
320 */
321 for (map = mac_modes; map->vmode != -1; map++) {
322 const struct fb_videomode *mode = map->mode;
323
324 if (var->xres > mode->xres || var->yres > mode->yres)
325 continue;
326 if (var->xres_virtual > mode->xres || var->yres_virtual > mode->yres)
327 continue;
328 if (var->pixclock > mode->pixclock)
329 continue;
330 if ((var->vmode & FB_VMODE_MASK) != mode->vmode)
331 continue;
332 *vmode = map->vmode;
333
334 /*
335 * Having found a good resolution, find the matching pixel clock
336 * or failing that, the closest longer pixel clock period.
337 */
338 map++;
339 while (map->vmode != -1) {
340 const struct fb_videomode *clk_mode = map->mode;
341
342 if (mode->xres != clk_mode->xres || mode->yres != clk_mode->yres)
343 break;
344 if (var->pixclock > mode->pixclock)
345 break;
346 if (mode->vmode != clk_mode->vmode)
347 continue;
348 *vmode = map->vmode;
349 map++;
350 }
351 return 0;
352 }
353 return -EINVAL;
354 }
355
356 /**
357 * mac_map_monitor_sense - Convert monitor sense to vmode
358 * @sense: Macintosh monitor sense number
359 *
360 * Converts a Macintosh monitor sense number to a MacOS
361 * vmode number.
362 *
363 * Returns MacOS vmode video mode number.
364 *
365 */
366
mac_map_monitor_sense(int sense)367 int mac_map_monitor_sense(int sense)
368 {
369 const struct monitor_map *map;
370
371 for (map = mac_monitors; map->sense != -1; map++)
372 if (map->sense == sense)
373 break;
374 return map->vmode;
375 }
376 EXPORT_SYMBOL(mac_map_monitor_sense);
377
378 /**
379 * mac_find_mode - find a video mode
380 * @var: frame buffer user defined part of display
381 * @info: frame buffer info structure
382 * @mode_option: video mode name (see mac_modedb[])
383 * @default_bpp: default color depth in bits per pixel
384 *
385 * Finds a suitable video mode. Tries to set mode specified
386 * by @mode_option. If the name of the wanted mode begins with
387 * 'mac', the Mac video mode database will be used, otherwise it
388 * will fall back to the standard video mode database.
389 *
390 * Note: Function marked as __init and can only be used during
391 * system boot.
392 *
393 * Returns error code from fb_find_mode (see fb_find_mode
394 * function).
395 *
396 */
397
mac_find_mode(struct fb_var_screeninfo * var,struct fb_info * info,const char * mode_option,unsigned int default_bpp)398 int mac_find_mode(struct fb_var_screeninfo *var, struct fb_info *info,
399 const char *mode_option, unsigned int default_bpp)
400 {
401 const struct fb_videomode *db = NULL;
402 unsigned int dbsize = 0;
403
404 if (mode_option && !strncmp(mode_option, "mac", 3)) {
405 mode_option += 3;
406 db = mac_modedb;
407 dbsize = ARRAY_SIZE(mac_modedb);
408 }
409 return fb_find_mode(var, info, mode_option, db, dbsize,
410 &mac_modedb[DEFAULT_MODEDB_INDEX], default_bpp);
411 }
412 EXPORT_SYMBOL(mac_find_mode);
413
414 MODULE_LICENSE("GPL");
415