git.oblomov.eu Git - linux-2.6/blob - drivers/video/macfb.c

   1 /* macfb.c: Generic framebuffer for Macs whose colourmaps/modes we
   2    don't know how to set */
   3
   4 /* (c) 1999 David Huggins-Daines <dhd@debian.org>
   5
   6    Primarily based on vesafb.c, by Gerd Knorr
   7    (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
   8
   9    Also uses information and code from:
  10
  11    The original macfb.c from Linux/mac68k 2.0, by Alan Cox, Juergen
  12    Mellinger, Mikael Forselius, Michael Schmitz, and others.
  13
  14    valkyriefb.c, by Martin Costabel, Kevin Schoedel, Barry Nathan, Dan
  15    Jacobowitz, Paul Mackerras, Fabio Riccardi, and Geert Uytterhoeven.
  16
  17    This code is free software.  You may copy, modify, and distribute
  18    it subject to the terms and conditions of the GNU General Public
  19    License, version 2, or any later version, at your convenience. */
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.h>
  24 #include <linux/errno.h>
  25 #include <linux/string.h>
  26 #include <linux/mm.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29 #include <linux/nubus.h>
  30 #include <linux/init.h>
  31 #include <linux/fb.h>
  32
  33 #include <asm/setup.h>
  34 #include <asm/bootinfo.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/irq.h>
  38 #include <asm/macintosh.h>
  39 #include <asm/io.h>
  40 #include <asm/machw.h>
  41
  42 /* Common DAC base address for the LC, RBV, Valkyrie, and IIvx */
  43 #define DAC_BASE 0x50f24000
  44
  45 /* Some addresses for the DAFB */
  46 #define DAFB_BASE 0xf9800200
  47
  48 /* Address for the built-in Civic framebuffer in Quadra AVs */
  49 #define CIVIC_BASE 0x50f30800   /* Only tested on 660AV! */
  50
  51 /* GSC (Gray Scale Controller) base address */
  52 #define GSC_BASE 0x50F20000
  53
  54 /* CSC (Color Screen Controller) base address */
  55 #define CSC_BASE 0x50F20000
  56
  57 static int (*macfb_setpalette) (unsigned int regno, unsigned int red,
  58                                 unsigned int green, unsigned int blue,
  59                                 struct fb_info *info) = NULL;
  60 static int valkyrie_setpalette (unsigned int regno, unsigned int red,
  61                                 unsigned int green, unsigned int blue,
  62                                 struct fb_info *info);
  63 static int dafb_setpalette (unsigned int regno, unsigned int red,
  64                             unsigned int green, unsigned int blue,
  65                             struct fb_info *fb_info);
  66 static int rbv_setpalette (unsigned int regno, unsigned int red,
  67                            unsigned int green, unsigned int blue,
  68                            struct fb_info *fb_info);
  69 static int mdc_setpalette (unsigned int regno, unsigned int red,
  70                            unsigned int green, unsigned int blue,
  71                            struct fb_info *fb_info);
  72 static int toby_setpalette (unsigned int regno, unsigned int red,
  73                             unsigned int green, unsigned int blue,
  74                             struct fb_info *fb_info);
  75 static int civic_setpalette (unsigned int regno, unsigned int red,
  76                              unsigned int green, unsigned int blue,
  77                              struct fb_info *fb_info);
  78 static int csc_setpalette (unsigned int regno, unsigned int red,
  79                            unsigned int green, unsigned int blue,
  80                            struct fb_info *fb_info);
  81
  82 static volatile struct {
  83         unsigned char addr;
  84         /* Note: word-aligned */
  85         char pad[3];
  86         unsigned char lut;
  87 } *valkyrie_cmap_regs;
  88
  89 static volatile struct {
  90         unsigned char addr;
  91         unsigned char lut;
  92 } *v8_brazil_cmap_regs;
  93
  94 static volatile struct {
  95         unsigned char addr;
  96         char pad1[3]; /* word aligned */
  97         unsigned char lut;
  98         char pad2[3]; /* word aligned */
  99         unsigned char cntl; /* a guess as to purpose */
 100 } *rbv_cmap_regs;
 101
 102 static volatile struct {
 103         unsigned long reset;
 104         unsigned long pad1[3];
 105         unsigned char pad2[3];
 106         unsigned char lut;
 107 } *dafb_cmap_regs;
 108
 109 static volatile struct {
 110         unsigned char addr;     /* OFFSET: 0x00 */
 111         unsigned char pad1[15];
 112         unsigned char lut;      /* OFFSET: 0x10 */
 113         unsigned char pad2[15];
 114         unsigned char status;   /* OFFSET: 0x20 */
 115         unsigned char pad3[7];
 116         unsigned long vbl_addr; /* OFFSET: 0x28 */
 117         unsigned int  status2;  /* OFFSET: 0x2C */
 118 } *civic_cmap_regs;
 119
 120 static volatile struct {
 121         char    pad1[0x40];
 122         unsigned char   clut_waddr;     /* 0x40 */
 123         char    pad2;
 124         unsigned char   clut_data;      /* 0x42 */
 125         char    pad3[0x3];
 126         unsigned char   clut_raddr;     /* 0x46 */
 127 } *csc_cmap_regs;
 128
 129 /* We will leave these the way they are for the time being */
 130 struct mdc_cmap_regs {
 131         char pad1[0x200200];
 132         unsigned char addr;
 133         char pad2[6];
 134         unsigned char lut;
 135 };
 136
 137 struct toby_cmap_regs {
 138         char pad1[0x90018];
 139         unsigned char lut; /* TFBClutWDataReg, offset 0x90018 */
 140         char pad2[3];
 141         unsigned char addr; /* TFBClutAddrReg, offset 0x9001C */
 142 };
 143
 144 struct jet_cmap_regs {
 145         char pad1[0xe0e000];
 146         unsigned char addr;
 147         unsigned char lut;
 148 };
 149
 150 #define PIXEL_TO_MM(a)  (((a)*10)/28)   /* width in mm at 72 dpi */
 151
 152 /* mode */
 153 static int  video_slot = 0;
 154
 155 static struct fb_var_screeninfo macfb_defined = {
 156         .bits_per_pixel = 8,
 157         .activate       = FB_ACTIVATE_NOW,
 158         .width          = -1,
 159         .height         = -1,
 160         .right_margin   = 32,
 161         .upper_margin   = 16,
 162         .lower_margin   = 4,
 163         .vsync_len      = 4,
 164         .vmode          = FB_VMODE_NONINTERLACED,
 165 };
 166
 167 static struct fb_fix_screeninfo macfb_fix = {
 168         .id     = "Macintosh ",
 169         .type   = FB_TYPE_PACKED_PIXELS,
 170         .accel  = FB_ACCEL_NONE,
 171 };
 172
 173 static struct fb_info fb_info;
 174 static u32 pseudo_palette[17];
 175 static int inverse   = 0;
 176 static int vidtest   = 0;
 177
 178 static int valkyrie_setpalette (unsigned int regno, unsigned int red,
 179                                 unsigned int green, unsigned int blue,
 180                                 struct fb_info *info)
 181 {
 182         unsigned long flags;
 183
 184         red >>= 8;
 185         green >>= 8;
 186         blue >>= 8;
 187
 188         local_irq_save(flags);
 189
 190         /* tell clut which address to fill */
 191         nubus_writeb(regno, &valkyrie_cmap_regs->addr);
 192         nop();
 193
 194         /* send one color channel at a time */
 195         nubus_writeb(red, &valkyrie_cmap_regs->lut);
 196         nop();
 197         nubus_writeb(green, &valkyrie_cmap_regs->lut);
 198         nop();
 199         nubus_writeb(blue, &valkyrie_cmap_regs->lut);
 200
 201         local_irq_restore(flags);
 202         return 0;
 203 }
 204
 205 /* Unlike the Valkyrie, the DAFB cannot set individual colormap
 206    registers.  Therefore, we do what the MacOS driver does (no
 207    kidding!) and simply set them one by one until we hit the one we
 208    want. */
 209 static int dafb_setpalette (unsigned int regno, unsigned int red,
 210                             unsigned int green, unsigned int blue,
 211                             struct fb_info *info)
 212 {
 213         /* FIXME: really, really need to use ioremap() here,
 214            phys_to_virt() doesn't work anymore */
 215         static int lastreg = -1;
 216         unsigned long flags;
 217
 218         red >>= 8;
 219         green >>= 8;
 220         blue >>= 8;
 221
 222         local_irq_save(flags);
 223
 224         /* fbdev will set an entire colourmap, but X won't.  Hopefully
 225            this should accommodate both of them */
 226         if (regno != lastreg+1) {
 227                 int i;
 228
 229                 /* Stab in the dark trying to reset the CLUT pointer */
 230                 nubus_writel(0, &dafb_cmap_regs->reset);
 231                 nop();
 232
 233                 /* Loop until we get to the register we want */
 234                 for (i = 0; i < regno; i++) {
 235                         nubus_writeb(info->cmap.red[i] >> 8, &dafb_cmap_regs->lut);
 236                         nop();
 237                         nubus_writeb(info->cmap.green[i] >> 8, &dafb_cmap_regs->lut);
 238                         nop();
 239                         nubus_writeb(info->cmap.blue[i] >> 8, &dafb_cmap_regs->lut);
 240                         nop();
 241                 }
 242         }
 243
 244         nubus_writeb(red, &dafb_cmap_regs->lut);
 245         nop();
 246         nubus_writeb(green, &dafb_cmap_regs->lut);
 247         nop();
 248         nubus_writeb(blue, &dafb_cmap_regs->lut);
 249
 250         local_irq_restore(flags);
 251         lastreg = regno;
 252         return 0;
 253 }
 254
 255 /* V8 and Brazil seem to use the same DAC.  Sonora does as well. */
 256 static int v8_brazil_setpalette (unsigned int regno, unsigned int red,
 257                                  unsigned int green, unsigned int blue,
 258                                  struct fb_info *info)
 259 {
 260         unsigned int bpp = info->var.bits_per_pixel;
 261         unsigned char _red  =red>>8;
 262         unsigned char _green=green>>8;
 263         unsigned char _blue =blue>>8;
 264         unsigned char _regno;
 265         unsigned long flags;
 266
 267         if (bpp > 8) return 1; /* failsafe */
 268
 269         local_irq_save(flags);
 270
 271         /* On these chips, the CLUT register numbers are spread out
 272            across the register space.  Thus:
 273
 274            In 8bpp, all regnos are valid.
 275
 276            In 4bpp, the regnos are 0x0f, 0x1f, 0x2f, etc, etc
 277
 278            In 2bpp, the regnos are 0x3f, 0x7f, 0xbf, 0xff */
 279         _regno = (regno << (8 - bpp)) | (0xFF >> bpp);
 280         nubus_writeb(_regno, &v8_brazil_cmap_regs->addr); nop();
 281
 282         /* send one color channel at a time */
 283         nubus_writeb(_red, &v8_brazil_cmap_regs->lut); nop();
 284         nubus_writeb(_green, &v8_brazil_cmap_regs->lut); nop();
 285         nubus_writeb(_blue, &v8_brazil_cmap_regs->lut);
 286
 287         local_irq_restore(flags);
 288         return 0;
 289 }
 290
 291 static int rbv_setpalette (unsigned int regno, unsigned int red,
 292                            unsigned int green, unsigned int blue,
 293                            struct fb_info *info)
 294 {
 295         /* use MSBs */
 296         unsigned char _red  =red>>8;
 297         unsigned char _green=green>>8;
 298         unsigned char _blue =blue>>8;
 299         unsigned char _regno;
 300         unsigned long flags;
 301
 302         if (info->var.bits_per_pixel > 8) return 1; /* failsafe */
 303
 304         local_irq_save(flags);
 305
 306         /* From the VideoToolbox driver.  Seems to be saying that
 307          * regno #254 and #255 are the important ones for 1-bit color,
 308          * regno #252-255 are the important ones for 2-bit color, etc.
 309          */
 310         _regno = regno + (256-(1 << info->var.bits_per_pixel));
 311
 312         /* reset clut? (VideoToolbox sez "not necessary") */
 313         nubus_writeb(0xFF, &rbv_cmap_regs->cntl); nop();
 314
 315         /* tell clut which address to use. */
 316         nubus_writeb(_regno, &rbv_cmap_regs->addr); nop();
 317
 318         /* send one color channel at a time. */
 319         nubus_writeb(_red,   &rbv_cmap_regs->lut); nop();
 320         nubus_writeb(_green, &rbv_cmap_regs->lut); nop();
 321         nubus_writeb(_blue,  &rbv_cmap_regs->lut);
 322
 323         local_irq_restore(flags); /* done. */
 324         return 0;
 325 }
 326
 327 /* Macintosh Display Card (8x24) */
 328 static int mdc_setpalette(unsigned int regno, unsigned int red,
 329                           unsigned int green, unsigned int blue,
 330                           struct fb_info *info)
 331 {
 332         volatile struct mdc_cmap_regs *cmap_regs =
 333                 nubus_slot_addr(video_slot);
 334         /* use MSBs */
 335         unsigned char _red  =red>>8;
 336         unsigned char _green=green>>8;
 337         unsigned char _blue =blue>>8;
 338         unsigned char _regno=regno;
 339         unsigned long flags;
 340
 341         local_irq_save(flags);
 342
 343         /* the nop's are there to order writes. */
 344         nubus_writeb(_regno, &cmap_regs->addr); nop();
 345         nubus_writeb(_red, &cmap_regs->lut);    nop();
 346         nubus_writeb(_green, &cmap_regs->lut);  nop();
 347         nubus_writeb(_blue, &cmap_regs->lut);
 348
 349         local_irq_restore(flags);
 350         return 0;
 351 }
 352
 353 /* Toby frame buffer */
 354 static int toby_setpalette(unsigned int regno, unsigned int red,
 355                            unsigned int green, unsigned int blue,
 356                            struct fb_info *info)
 357 {
 358         volatile struct toby_cmap_regs *cmap_regs =
 359                 nubus_slot_addr(video_slot);
 360         unsigned int bpp = info->var.bits_per_pixel;
 361         /* use MSBs */
 362         unsigned char _red  =~(red>>8);
 363         unsigned char _green=~(green>>8);
 364         unsigned char _blue =~(blue>>8);
 365         unsigned char _regno = (regno << (8 - bpp)) | (0xFF >> bpp);
 366         unsigned long flags;
 367
 368         local_irq_save(flags);
 369
 370         nubus_writeb(_regno, &cmap_regs->addr); nop();
 371         nubus_writeb(_red, &cmap_regs->lut);    nop();
 372         nubus_writeb(_green, &cmap_regs->lut);  nop();
 373         nubus_writeb(_blue, &cmap_regs->lut);
 374
 375         local_irq_restore(flags);
 376         return 0;
 377 }
 378
 379 /* Jet frame buffer */
 380 static int jet_setpalette(unsigned int regno, unsigned int red,
 381                           unsigned int green, unsigned int blue,
 382                           struct fb_info *info)
 383 {
 384         volatile struct jet_cmap_regs *cmap_regs =
 385                 nubus_slot_addr(video_slot);
 386         /* use MSBs */
 387         unsigned char _red   = (red>>8);
 388         unsigned char _green = (green>>8);
 389         unsigned char _blue  = (blue>>8);
 390         unsigned long flags;
 391
 392         local_irq_save(flags);
 393
 394         nubus_writeb(regno, &cmap_regs->addr); nop();
 395         nubus_writeb(_red, &cmap_regs->lut); nop();
 396         nubus_writeb(_green, &cmap_regs->lut); nop();
 397         nubus_writeb(_blue, &cmap_regs->lut);
 398
 399         local_irq_restore(flags);
 400         return 0;
 401 }
 402
 403 /*
 404  * Civic framebuffer -- Quadra AV built-in video.  A chip
 405  * called Sebastian holds the actual color palettes, and
 406  * apparently, there are two different banks of 512K RAM
 407  * which can act as separate framebuffers for doing video
 408  * input and viewing the screen at the same time!  The 840AV
 409  * Can add another 1MB RAM to give the two framebuffers
 410  * 1MB RAM apiece.
 411  *
 412  * FIXME: this doesn't seem to work anymore.
 413  */
 414 static int civic_setpalette (unsigned int regno, unsigned int red,
 415                              unsigned int green, unsigned int blue,
 416                              struct fb_info *info)
 417 {
 418         static int lastreg = -1;
 419         unsigned long flags;
 420         int clut_status;
 421
 422         if (info->var.bits_per_pixel > 8) return 1; /* failsafe */
 423
 424         red   >>= 8;
 425         green >>= 8;
 426         blue  >>= 8;
 427
 428         local_irq_save(flags);
 429
 430         /*
 431          * Set the register address
 432          */
 433         nubus_writeb(regno, &civic_cmap_regs->addr); nop();
 434
 435         /*
 436          * Wait for VBL interrupt here;
 437          * They're usually not enabled from Penguin, so we won't check
 438          */
 439 #if 0
 440         {
 441 #define CIVIC_VBL_OFFSET        0x120
 442                 volatile unsigned long *vbl = nubus_readl(civic_cmap_regs->vbl_addr + CIVIC_VBL_OFFSET);
 443                 /* do interrupt setup stuff here? */
 444                 *vbl = 0L; nop();       /* clear */
 445                 *vbl = 1L; nop();       /* set */
 446                 while (*vbl != 0L)      /* wait for next vbl */
 447                 {
 448                         usleep(10);     /* needed? */
 449                 }
 450                 /* do interrupt shutdown stuff here? */
 451         }
 452 #endif
 453
 454         /*
 455          * Grab a status word and do some checking;
 456          * Then finally write the clut!
 457          */
 458         clut_status =  nubus_readb(&civic_cmap_regs->status2);
 459
 460         if ((clut_status & 0x0008) == 0)
 461         {
 462 #if 0
 463                 if ((clut_status & 0x000D) != 0)
 464                 {
 465                         nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
 466                         nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
 467                 }
 468 #endif
 469
 470                 nubus_writeb(  red, &civic_cmap_regs->lut); nop();
 471                 nubus_writeb(green, &civic_cmap_regs->lut); nop();
 472                 nubus_writeb( blue, &civic_cmap_regs->lut); nop();
 473                 nubus_writeb( 0x00, &civic_cmap_regs->lut); nop();
 474         }
 475         else
 476         {
 477                 unsigned char junk;
 478
 479                 junk = nubus_readb(&civic_cmap_regs->lut); nop();
 480                 junk = nubus_readb(&civic_cmap_regs->lut); nop();
 481                 junk = nubus_readb(&civic_cmap_regs->lut); nop();
 482                 junk = nubus_readb(&civic_cmap_regs->lut); nop();
 483
 484                 if ((clut_status & 0x000D) != 0)
 485                 {
 486                         nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
 487                         nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
 488                 }
 489
 490                 nubus_writeb(  red, &civic_cmap_regs->lut); nop();
 491                 nubus_writeb(green, &civic_cmap_regs->lut); nop();
 492                 nubus_writeb( blue, &civic_cmap_regs->lut); nop();
 493                 nubus_writeb( junk, &civic_cmap_regs->lut); nop();
 494         }
 495
 496         local_irq_restore(flags);
 497         lastreg = regno;
 498         return 0;
 499 }
 500
 501 /*
 502  * The CSC is the framebuffer on the PowerBook 190 series
 503  * (and the 5300 too, but that's a PowerMac). This function
 504  * brought to you in part by the ECSC driver for MkLinux.
 505  */
 506
 507 static int csc_setpalette (unsigned int regno, unsigned int red,
 508                            unsigned int green, unsigned int blue,
 509                            struct fb_info *info)
 510 {
 511         mdelay(1);
 512         csc_cmap_regs->clut_waddr = regno;
 513         csc_cmap_regs->clut_data = red;
 514         csc_cmap_regs->clut_data = green;
 515         csc_cmap_regs->clut_data = blue;
 516         return 0;
 517 }
 518
 519 static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 520                            unsigned blue, unsigned transp,
 521                            struct fb_info *fb_info)
 522 {
 523         /*
 524          *  Set a single color register. The values supplied are
 525          *  already rounded down to the hardware's capabilities
 526          *  (according to the entries in the `var' structure). Return
 527          *  != 0 for invalid regno.
 528          */
 529
 530         if (regno >= fb_info->cmap.len)
 531                 return 1;
 532
 533         switch (fb_info->var.bits_per_pixel) {
 534         case 1:
 535                 /* We shouldn't get here */
 536                 break;
 537         case 2:
 538         case 4:
 539         case 8:
 540                 if (macfb_setpalette)
 541                         macfb_setpalette(regno, red, green, blue, fb_info);
 542                 else
 543                         return 1;
 544                 break;
 545         case 16:
 546                 if (fb_info->var.red.offset == 10) {
 547                         /* 1:5:5:5 */
 548                         ((u32*) (fb_info->pseudo_palette))[regno] =
 549                                         ((red   & 0xf800) >>  1) |
 550                                         ((green & 0xf800) >>  6) |
 551                                         ((blue  & 0xf800) >> 11) |
 552                                         ((transp != 0) << 15);
 553                 } else {
 554                         /* 0:5:6:5 */
 555                         ((u32*) (fb_info->pseudo_palette))[regno] =
 556                                         ((red   & 0xf800)      ) |
 557                                         ((green & 0xfc00) >>  5) |
 558                                         ((blue  & 0xf800) >> 11);
 559                 }
 560                 break;
 561                 /* I'm pretty sure that one or the other of these
 562                    doesn't exist on 68k Macs */
 563         case 24:
 564                 red   >>= 8;
 565                 green >>= 8;
 566                 blue  >>= 8;
 567                 ((u32 *)(fb_info->pseudo_palette))[regno] =
 568                         (red   << fb_info->var.red.offset)   |
 569                         (green << fb_info->var.green.offset) |
 570                         (blue  << fb_info->var.blue.offset);
 571                 break;
 572         case 32:
 573                 red   >>= 8;
 574                 green >>= 8;
 575                 blue  >>= 8;
 576                 ((u32 *)(fb_info->pseudo_palette))[regno] =
 577                         (red   << fb_info->var.red.offset)   |
 578                         (green << fb_info->var.green.offset) |
 579                         (blue  << fb_info->var.blue.offset);
 580                 break;
 581     }
 582     return 0;
 583 }
 584
 585 static struct fb_ops macfb_ops = {
 586         .owner          = THIS_MODULE,
 587         .fb_setcolreg   = macfb_setcolreg,
 588         .fb_fillrect    = cfb_fillrect,
 589         .fb_copyarea    = cfb_copyarea,
 590         .fb_imageblit   = cfb_imageblit,
 591 };
 592
 593 void __init macfb_setup(char *options)
 594 {
 595         char *this_opt;
 596
 597         if (!options || !*options)
 598                 return;
 599
 600         while ((this_opt = strsep(&options, ",")) != NULL) {
 601                 if (!*this_opt) continue;
 602
 603                 if (! strcmp(this_opt, "inverse"))
 604                         inverse=1;
 605                 /* This means "turn on experimental CLUT code" */
 606                 else if (!strcmp(this_opt, "vidtest"))
 607                         vidtest=1;
 608         }
 609 }
 610
 611 static int __init macfb_init(void)
 612 {
 613         int video_cmap_len, video_is_nubus = 0;
 614         struct nubus_dev* ndev = NULL;
 615         char *option = NULL;
 616         int err;
 617
 618         if (fb_get_options("macfb", &option))
 619                 return -ENODEV;
 620         macfb_setup(option);
 621
 622         if (!MACH_IS_MAC)
 623                 return -ENODEV;
 624
 625         /* There can only be one internal video controller anyway so
 626            we're not too worried about this */
 627         macfb_defined.xres = mac_bi_data.dimensions & 0xFFFF;
 628         macfb_defined.yres = mac_bi_data.dimensions >> 16;
 629         macfb_defined.bits_per_pixel = mac_bi_data.videodepth;
 630         macfb_fix.line_length = mac_bi_data.videorow;
 631         macfb_fix.smem_len = macfb_fix.line_length * macfb_defined.yres;
 632         /* Note: physical address (since 2.1.127) */
 633         macfb_fix.smem_start = mac_bi_data.videoaddr;
 634         /* This is actually redundant with the initial mappings.
 635            However, there are some non-obvious aspects to the way
 636            those mappings are set up, so this is in fact the safest
 637            way to ensure that this driver will work on every possible
 638            Mac */
 639         fb_info.screen_base = ioremap(mac_bi_data.videoaddr, macfb_fix.smem_len);
 640
 641         printk("macfb: framebuffer at 0x%08lx, mapped to 0x%p, size %dk\n",
 642                macfb_fix.smem_start, fb_info.screen_base, macfb_fix.smem_len/1024);
 643         printk("macfb: mode is %dx%dx%d, linelength=%d\n",
 644                macfb_defined.xres, macfb_defined.yres, macfb_defined.bits_per_pixel, macfb_fix.line_length);
 645
 646         /*
 647          *      Fill in the available video resolution
 648          */
 649
 650         macfb_defined.xres_virtual   = macfb_defined.xres;
 651         macfb_defined.yres_virtual   = macfb_defined.yres;
 652         macfb_defined.height = PIXEL_TO_MM(macfb_defined.yres);
 653         macfb_defined.width  = PIXEL_TO_MM(macfb_defined.xres);
 654
 655         printk("macfb: scrolling: redraw\n");
 656         macfb_defined.yres_virtual = macfb_defined.yres;
 657
 658         /* some dummy values for timing to make fbset happy */
 659         macfb_defined.pixclock     = 10000000 / macfb_defined.xres * 1000 / macfb_defined.yres;
 660         macfb_defined.left_margin  = (macfb_defined.xres / 8) & 0xf8;
 661         macfb_defined.hsync_len    = (macfb_defined.xres / 8) & 0xf8;
 662
 663         switch (macfb_defined.bits_per_pixel) {
 664         case 1:
 665                 /* XXX: I think this will catch any program that tries
 666                    to do FBIO_PUTCMAP when the visual is monochrome */
 667                 macfb_defined.red.length = macfb_defined.bits_per_pixel;
 668                 macfb_defined.green.length = macfb_defined.bits_per_pixel;
 669                 macfb_defined.blue.length = macfb_defined.bits_per_pixel;
 670                 video_cmap_len = 0;
 671                 macfb_fix.visual = FB_VISUAL_MONO01;
 672                 break;
 673         case 2:
 674         case 4:
 675         case 8:
 676                 macfb_defined.red.length = macfb_defined.bits_per_pixel;
 677                 macfb_defined.green.length = macfb_defined.bits_per_pixel;
 678                 macfb_defined.blue.length = macfb_defined.bits_per_pixel;
 679                 video_cmap_len = 1 << macfb_defined.bits_per_pixel;
 680                 macfb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
 681                 break;
 682         case 16:
 683                 macfb_defined.transp.offset = 15;
 684                 macfb_defined.transp.length = 1;
 685                 macfb_defined.red.offset = 10;
 686                 macfb_defined.red.length = 5;
 687                 macfb_defined.green.offset = 5;
 688                 macfb_defined.green.length = 5;
 689                 macfb_defined.blue.offset = 0;
 690                 macfb_defined.blue.length = 5;
 691                 printk("macfb: directcolor: "
 692                        "size=1:5:5:5, shift=15:10:5:0\n");
 693                 video_cmap_len = 16;
 694                 /* Should actually be FB_VISUAL_DIRECTCOLOR, but this
 695                    works too */
 696                 macfb_fix.visual = FB_VISUAL_TRUECOLOR;
 697                 break;
 698         case 24:
 699         case 32:
 700                 /* XXX: have to test these... can any 68k Macs
 701                    actually do this on internal video? */
 702                 macfb_defined.red.offset = 16;
 703                 macfb_defined.red.length = 8;
 704                 macfb_defined.green.offset = 8;
 705                 macfb_defined.green.length = 8;
 706                 macfb_defined.blue.offset = 0;
 707                 macfb_defined.blue.length = 8;
 708                 printk("macfb: truecolor: "
 709                        "size=0:8:8:8, shift=0:16:8:0\n");
 710                 video_cmap_len = 16;
 711                 macfb_fix.visual = FB_VISUAL_TRUECOLOR;
 712         default:
 713                 video_cmap_len = 0;
 714                 macfb_fix.visual = FB_VISUAL_MONO01;
 715                 printk("macfb: unknown or unsupported bit depth: %d\n", macfb_defined.bits_per_pixel);
 716                 break;
 717         }
 718
 719         /* Hardware dependent stuff */
 720         /*  We take a wild guess that if the video physical address is
 721          *  in nubus slot space, that the nubus card is driving video.
 722          *  Penguin really ought to tell us whether we are using internal
 723          *  video or not.
 724          */
 725         /* Hopefully we only find one of them.  Otherwise our NuBus
 726            code is really broken :-) */
 727
 728         while ((ndev = nubus_find_type(NUBUS_CAT_DISPLAY, NUBUS_TYPE_VIDEO, ndev))
 729                 != NULL)
 730         {
 731                 if (!(mac_bi_data.videoaddr >= ndev->board->slot_addr
 732                       && (mac_bi_data.videoaddr <
 733                           (unsigned long)nubus_slot_addr(ndev->board->slot+1))))
 734                         continue;
 735                 video_is_nubus = 1;
 736                 /* We should probably just use the slot address... */
 737                 video_slot = ndev->board->slot;
 738
 739                 switch(ndev->dr_hw) {
 740                 case NUBUS_DRHW_APPLE_MDC:
 741                         strcat( macfb_fix.id, "Display Card" );
 742                         macfb_setpalette = mdc_setpalette;
 743                         macfb_defined.activate = FB_ACTIVATE_NOW;
 744                         break;
 745                 case NUBUS_DRHW_APPLE_TFB:
 746                         strcat( macfb_fix.id, "Toby" );
 747                         macfb_setpalette = toby_setpalette;
 748                         macfb_defined.activate = FB_ACTIVATE_NOW;
 749                         break;
 750                 case NUBUS_DRHW_APPLE_JET:
 751                         strcat( macfb_fix.id, "Jet");
 752                         macfb_setpalette = jet_setpalette;
 753                         macfb_defined.activate = FB_ACTIVATE_NOW;
 754                         break;
 755                 default:
 756                         strcat( macfb_fix.id, "Generic NuBus" );
 757                         break;
 758                 }
 759         }
 760
 761         /* If it's not a NuBus card, it must be internal video */
 762         /* FIXME: this function is getting way too big.  (this driver
 763            is too...) */
 764         if (!video_is_nubus)
 765                 switch( mac_bi_data.id )
 766                 {
 767                         /* These don't have onboard video.  Eventually, we may
 768                            be able to write separate framebuffer drivers for
 769                            them (tobyfb.c, hiresfb.c, etc, etc) */
 770                 case MAC_MODEL_II:
 771                 case MAC_MODEL_IIX:
 772                 case MAC_MODEL_IICX:
 773                 case MAC_MODEL_IIFX:
 774                         strcat( macfb_fix.id, "Generic NuBus" );
 775                         break;
 776
 777                         /* Valkyrie Quadras */
 778                 case MAC_MODEL_Q630:
 779                         /* I'm not sure about this one */
 780                 case MAC_MODEL_P588:
 781                         strcat( macfb_fix.id, "Valkyrie built-in" );
 782                         macfb_setpalette = valkyrie_setpalette;
 783                         macfb_defined.activate = FB_ACTIVATE_NOW;
 784                         valkyrie_cmap_regs = ioremap(DAC_BASE, 0x1000);
 785                         break;
 786
 787                         /* DAFB Quadras */
 788                         /* Note: these first four have the v7 DAFB, which is
 789                            known to be rather unlike the ones used in the
 790                            other models */
 791                 case MAC_MODEL_P475:
 792                 case MAC_MODEL_P475F:
 793                 case MAC_MODEL_P575:
 794                 case MAC_MODEL_Q605:
 795
 796                 case MAC_MODEL_Q800:
 797                 case MAC_MODEL_Q650:
 798                 case MAC_MODEL_Q610:
 799                 case MAC_MODEL_C650:
 800                 case MAC_MODEL_C610:
 801                 case MAC_MODEL_Q700:
 802                 case MAC_MODEL_Q900:
 803                 case MAC_MODEL_Q950:
 804                         strcat( macfb_fix.id, "DAFB built-in" );
 805                         macfb_setpalette = dafb_setpalette;
 806                         macfb_defined.activate = FB_ACTIVATE_NOW;
 807                         dafb_cmap_regs = ioremap(DAFB_BASE, 0x1000);
 808                         break;
 809
 810                         /* LC II uses the V8 framebuffer */
 811                 case MAC_MODEL_LCII:
 812                         strcat( macfb_fix.id, "V8 built-in" );
 813                         macfb_setpalette = v8_brazil_setpalette;
 814                         macfb_defined.activate = FB_ACTIVATE_NOW;
 815                         v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 816                         break;
 817
 818                         /* IIvi, IIvx use the "Brazil" framebuffer (which is
 819                            very much like the V8, it seems, and probably uses
 820                            the same DAC) */
 821                 case MAC_MODEL_IIVI:
 822                 case MAC_MODEL_IIVX:
 823                 case MAC_MODEL_P600:
 824                         strcat( macfb_fix.id, "Brazil built-in" );
 825                         macfb_setpalette = v8_brazil_setpalette;
 826                         macfb_defined.activate = FB_ACTIVATE_NOW;
 827                         v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 828                         break;
 829
 830                         /* LC III (and friends) use the Sonora framebuffer */
 831                         /* Incidentally this is also used in the non-AV models
 832                            of the x100 PowerMacs */
 833                         /* These do in fact seem to use the same DAC interface
 834                            as the LC II. */
 835                 case MAC_MODEL_LCIII:
 836                 case MAC_MODEL_P520:
 837                 case MAC_MODEL_P550:
 838                 case MAC_MODEL_P460:
 839                         macfb_setpalette = v8_brazil_setpalette;
 840                         macfb_defined.activate = FB_ACTIVATE_NOW;
 841                         strcat( macfb_fix.id, "Sonora built-in" );
 842                         v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 843                         break;
 844
 845                         /* IIci and IIsi use the infamous RBV chip
 846                            (the IIsi is just a rebadged and crippled
 847                            IIci in a different case, BTW) */
 848                 case MAC_MODEL_IICI:
 849                 case MAC_MODEL_IISI:
 850                         macfb_setpalette = rbv_setpalette;
 851                         macfb_defined.activate = FB_ACTIVATE_NOW;
 852                         strcat( macfb_fix.id, "RBV built-in" );
 853                         rbv_cmap_regs = ioremap(DAC_BASE, 0x1000);
 854                         break;
 855
 856                         /* AVs use the Civic framebuffer */
 857                 case MAC_MODEL_Q840:
 858                 case MAC_MODEL_C660:
 859                         macfb_setpalette = civic_setpalette;
 860                         macfb_defined.activate = FB_ACTIVATE_NOW;
 861                         strcat( macfb_fix.id, "Civic built-in" );
 862                         civic_cmap_regs = ioremap(CIVIC_BASE, 0x1000);
 863                         break;
 864
 865
 866                         /* Write a setpalette function for your machine, then
 867                            you can add something similar here.  These are
 868                            grouped by classes of video chipsets.  Some of this
 869                            information is from the VideoToolbox "Bugs" web
 870                            page at
 871                            http://rajsky.psych.nyu.edu/Tips/VideoBugs.html */
 872
 873                         /* Assorted weirdos */
 874                         /* We think this may be like the LC II */
 875                 case MAC_MODEL_LC:
 876                         if (vidtest) {
 877                                 macfb_setpalette = v8_brazil_setpalette;
 878                                 macfb_defined.activate = FB_ACTIVATE_NOW;
 879                                 v8_brazil_cmap_regs =
 880                                         ioremap(DAC_BASE, 0x1000);
 881                         }
 882                         strcat( macfb_fix.id, "LC built-in" );
 883                         break;
 884                         /* We think this may be like the LC II */
 885                 case MAC_MODEL_CCL:
 886                         if (vidtest) {
 887                                 macfb_setpalette = v8_brazil_setpalette;
 888                                 macfb_defined.activate = FB_ACTIVATE_NOW;
 889                                 v8_brazil_cmap_regs =
 890                                         ioremap(DAC_BASE, 0x1000);
 891                         }
 892                         strcat( macfb_fix.id, "Color Classic built-in" );
 893                         break;
 894
 895                         /* And we *do* mean "weirdos" */
 896                 case MAC_MODEL_TV:
 897                         strcat( macfb_fix.id, "Mac TV built-in" );
 898                         break;
 899
 900                         /* These don't have colour, so no need to worry */
 901                 case MAC_MODEL_SE30:
 902                 case MAC_MODEL_CLII:
 903                         strcat( macfb_fix.id, "Monochrome built-in" );
 904                         break;
 905
 906                         /* Powerbooks are particularly difficult.  Many of
 907                            them have separate framebuffers for external and
 908                            internal video, which is admittedly pretty cool,
 909                            but will be a bit of a headache to support here.
 910                            Also, many of them are grayscale, and we don't
 911                            really support that. */
 912
 913                 case MAC_MODEL_PB140:
 914                 case MAC_MODEL_PB145:
 915                 case MAC_MODEL_PB170:
 916                         strcat( macfb_fix.id, "DDC built-in" );
 917                         break;
 918
 919                         /* Internal is GSC, External (if present) is ViSC */
 920                 case MAC_MODEL_PB150:   /* no external video */
 921                 case MAC_MODEL_PB160:
 922                 case MAC_MODEL_PB165:
 923                 case MAC_MODEL_PB180:
 924                 case MAC_MODEL_PB210:
 925                 case MAC_MODEL_PB230:
 926                         strcat( macfb_fix.id, "GSC built-in" );
 927                         break;
 928
 929                         /* Internal is TIM, External is ViSC */
 930                 case MAC_MODEL_PB165C:
 931                 case MAC_MODEL_PB180C:
 932                         strcat( macfb_fix.id, "TIM built-in" );
 933                         break;
 934
 935                         /* Internal is CSC, External is Keystone+Ariel. */
 936                 case MAC_MODEL_PB190:   /* external video is optional */
 937                 case MAC_MODEL_PB520:
 938                 case MAC_MODEL_PB250:
 939                 case MAC_MODEL_PB270C:
 940                 case MAC_MODEL_PB280:
 941                 case MAC_MODEL_PB280C:
 942                         macfb_setpalette = csc_setpalette;
 943                         macfb_defined.activate = FB_ACTIVATE_NOW;
 944                         strcat( macfb_fix.id, "CSC built-in" );
 945                         csc_cmap_regs = ioremap(CSC_BASE, 0x1000);
 946                         break;
 947
 948                 default:
 949                         strcat( macfb_fix.id, "Unknown/Unsupported built-in" );
 950                         break;
 951                 }
 952
 953         fb_info.fbops           = &macfb_ops;
 954         fb_info.var             = macfb_defined;
 955         fb_info.fix             = macfb_fix;
 956         fb_info.pseudo_palette  = pseudo_palette;
 957         fb_info.flags           = FBINFO_DEFAULT;
 958
 959         fb_alloc_cmap(&fb_info.cmap, video_cmap_len, 0);
 960
 961         err = register_framebuffer(&fb_info);
 962         if (!err)
 963                 printk("fb%d: %s frame buffer device\n",
 964                        fb_info.node, fb_info.fix.id);
 965         return err;
 966 }
 967
 968 module_init(macfb_init);
 969 MODULE_LICENSE("GPL");