drivers/video/macmodes.c

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