drivers/video/platinumfb.c

   1 /*
   2  *  platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
   3  *
   4  *  Copyright (C) 1998 Franz Sirl
   5  *
   6  *  Frame buffer structure from:
   7  *    drivers/video/controlfb.c -- frame buffer device for
   8  *    Apple 'control' display chip.
   9  *    Copyright (C) 1998 Dan Jacobowitz
  10  *
  11  *  Hardware information from:
  12  *    platinum.c: Console support for PowerMac "platinum" display adaptor.
  13  *    Copyright (C) 1996 Paul Mackerras and Mark Abene
  14  *
  15  *  This file is subject to the terms and conditions of the GNU General Public
  16  *  License. See the file COPYING in the main directory of this archive for
  17  *  more details.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/tty.h>
  26 #include <linux/slab.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/delay.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/fb.h>
  31 #include <linux/init.h>
  32 #include <linux/pci.h>
  33 #include <linux/nvram.h>
  34 #include <asm/io.h>
  35 #include <asm/prom.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/of_device.h>
  38
  39 #include "macmodes.h"
  40 #include "platinumfb.h"
  41
  42 static int default_vmode = VMODE_NVRAM;
  43 static int default_cmode = CMODE_NVRAM;
  44
  45 struct fb_info_platinum {
  46         struct fb_info                  *info;
  47
  48         int                             vmode, cmode;
  49         int                             xres, yres;
  50         int                             vxres, vyres;
  51         int                             xoffset, yoffset;
  52
  53         struct {
  54                 __u8 red, green, blue;
  55         }                               palette[256];
  56         u32                             pseudo_palette[17];
  57
  58         volatile struct cmap_regs       __iomem *cmap_regs;
  59         unsigned long                   cmap_regs_phys;
  60
  61         volatile struct platinum_regs   __iomem *platinum_regs;
  62         unsigned long                   platinum_regs_phys;
  63
  64         __u8                            __iomem *frame_buffer;
  65         volatile __u8                   __iomem *base_frame_buffer;
  66         unsigned long                   frame_buffer_phys;
  67
  68         unsigned long                   total_vram;
  69         int                             clktype;
  70         int                             dactype;
  71
  72         struct resource                 rsrc_fb, rsrc_reg;
  73 };
  74
  75 /*
  76  * Frame buffer device API
  77  */
  78
  79 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  80         u_int transp, struct fb_info *info);
  81 static int platinumfb_blank(int blank_mode, struct fb_info *info);
  82 static int platinumfb_set_par (struct fb_info *info);
  83 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  84
  85 /*
  86  * internal functions
  87  */
  88
  89 static inline int platinum_vram_reqd(int video_mode, int color_mode);
  90 static int read_platinum_sense(struct fb_info_platinum *pinfo);
  91 static void set_platinum_clock(struct fb_info_platinum *pinfo);
  92 static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  93 static int platinum_var_to_par(struct fb_var_screeninfo *var,
  94                                struct fb_info_platinum *pinfo,
  95                                int check_only);
  96
  97 /*
  98  * Interface used by the world
  99  */
 100
 101 static struct fb_ops platinumfb_ops = {
 102         .owner =        THIS_MODULE,
 103         .fb_check_var   = platinumfb_check_var,
 104         .fb_set_par     = platinumfb_set_par,
 105         .fb_setcolreg   = platinumfb_setcolreg,
 106         .fb_blank       = platinumfb_blank,
 107         .fb_fillrect    = cfb_fillrect,
 108         .fb_copyarea    = cfb_copyarea,
 109         .fb_imageblit   = cfb_imageblit,
 110 };
 111
 112 /*
 113  * Checks a var structure
 114  */
 115 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 116 {
 117         return platinum_var_to_par(var, info->par, 1);
 118 }
 119
 120 /*
 121  * Applies current var to display
 122  */
 123 static int platinumfb_set_par (struct fb_info *info)
 124 {
 125         struct fb_info_platinum *pinfo = info->par;
 126         struct platinum_regvals *init;
 127         int err, offset = 0x20;
 128
 129         if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 130                 printk (KERN_ERR "platinumfb_set_par: error calling"
 131                                  " platinum_var_to_par: %d.\n", err);
 132                 return err;
 133         }
 134
 135         platinum_set_hardware(pinfo);
 136
 137         init = platinum_reg_init[pinfo->vmode-1];
 138
 139         if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 140                 offset = 0x10;
 141
 142         info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 143         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 144         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 145                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 146         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 147                 + offset;
 148         printk("line_length: %x\n", info->fix.line_length);
 149         return 0;
 150 }
 151
 152 static int platinumfb_blank(int blank,  struct fb_info *fb)
 153 {
 154 /*
 155  *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 156  *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 157  *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 158  *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 159  *  and powerdown modes on hardware that supports disabling hsync/vsync:
 160  *    blank_mode == 2: suspend vsync
 161  *    blank_mode == 3: suspend hsync
 162  *    blank_mode == 4: powerdown
 163  */
 164 /* [danj] I think there's something fishy about those constants... */
 165 /*
 166         struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 167         int     ctrl;
 168
 169         ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
 170         if (blank)
 171                 --blank_mode;
 172         if (blank & VESA_VSYNC_SUSPEND)
 173                 ctrl &= ~3;
 174         if (blank & VESA_HSYNC_SUSPEND)
 175                 ctrl &= ~0x30;
 176         out_le32(&info->platinum_regs->ctrl.r, ctrl);
 177 */
 178 /* TODO: Figure out how the heck to powerdown this thing! */
 179         return 0;
 180 }
 181
 182 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 183                               u_int transp, struct fb_info *info)
 184 {
 185         struct fb_info_platinum *pinfo = info->par;
 186         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 187
 188         if (regno > 255)
 189                 return 1;
 190
 191         red >>= 8;
 192         green >>= 8;
 193         blue >>= 8;
 194
 195         pinfo->palette[regno].red = red;
 196         pinfo->palette[regno].green = green;
 197         pinfo->palette[regno].blue = blue;
 198
 199         out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 200         out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 201         out_8(&cmap_regs->lut, green);          /* a time...                    */
 202         out_8(&cmap_regs->lut, blue);
 203
 204         if (regno < 16) {
 205                 int i;
 206                 u32 *pal = info->pseudo_palette;
 207                 switch (pinfo->cmode) {
 208                 case CMODE_16:
 209                         pal[regno] = (regno << 10) | (regno << 5) | regno;
 210                         break;
 211                 case CMODE_32:
 212                         i = (regno << 8) | regno;
 213                         pal[regno] = (i << 16) | i;
 214                         break;
 215                 }
 216         }
 217
 218         return 0;
 219 }
 220
 221 static inline int platinum_vram_reqd(int video_mode, int color_mode)
 222 {
 223         return vmode_attrs[video_mode-1].vres *
 224                (vmode_attrs[video_mode-1].hres * (1<<color_mode) +
 225                 ((video_mode == VMODE_832_624_75) &&
 226                  (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000;
 227 }
 228
 229 #define STORE_D2(a, d) { \
 230         out_8(&cmap_regs->addr, (a+32)); \
 231         out_8(&cmap_regs->d2, (d)); \
 232 }
 233
 234 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 235 {
 236         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 237         struct platinum_regvals *init;
 238
 239         init = platinum_reg_init[pinfo->vmode-1];
 240
 241         STORE_D2(6, 0xc6);
 242         out_8(&cmap_regs->addr,3+32);
 243
 244         if (in_8(&cmap_regs->d2) == 2) {
 245                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 246                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 247                 STORE_D2(3, 3);
 248         } else {
 249                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 250                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 251                 STORE_D2(3, 2);
 252         }
 253
 254         __delay(5000);
 255         STORE_D2(9, 0xa6);
 256 }
 257
 258
 259 /* Now how about actually saying, Make it so! */
 260 /* Some things in here probably don't need to be done each time. */
 261 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 262 {
 263         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 264         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 265         struct platinum_regvals         *init;
 266         int                             i;
 267         int                             vmode, cmode;
 268
 269         vmode = pinfo->vmode;
 270         cmode = pinfo->cmode;
 271
 272         init = platinum_reg_init[vmode - 1];
 273
 274         /* Initialize display timing registers */
 275         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 276
 277         for (i = 0; i < 26; ++i)
 278                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 279
 280         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 281                                                 init->offset[cmode] + 4 - cmode :
 282                                                 init->offset[cmode]));
 283         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 284         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 285         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 286                                              init->mode[cmode+1] :
 287                                              init->mode[cmode]));
 288         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 289         out_be32(&platinum_regs->reg[21].r, 0x100);
 290         out_be32(&platinum_regs->reg[22].r, 1);
 291         out_be32(&platinum_regs->reg[23].r, 1);
 292         out_be32(&platinum_regs->reg[26].r, 0xc00);
 293         out_be32(&platinum_regs->reg[27].r, 0x235);
 294         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 295
 296         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 297                      init->dacula_ctrl[cmode] & 0xf :
 298                      init->dacula_ctrl[cmode]));
 299         STORE_D2(1, 4);
 300         STORE_D2(2, 0);
 301
 302         set_platinum_clock(pinfo);
 303
 304         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 305 }
 306
 307 /*
 308  * Set misc info vars for this driver
 309  */
 310 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
 311 {
 312         /* Fill fb_info */
 313         info->fbops = &platinumfb_ops;
 314         info->pseudo_palette = pinfo->pseudo_palette;
 315         info->flags = FBINFO_DEFAULT;
 316         info->screen_base = pinfo->frame_buffer + 0x20;
 317
 318         fb_alloc_cmap(&info->cmap, 256, 0);
 319
 320         /* Fill fix common fields */
 321         strcpy(info->fix.id, "platinum");
 322         info->fix.mmio_start = pinfo->platinum_regs_phys;
 323         info->fix.mmio_len = 0x1000;
 324         info->fix.type = FB_TYPE_PACKED_PIXELS;
 325         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 326         info->fix.smem_len = pinfo->total_vram - 0x20;
 327         info->fix.ywrapstep = 0;
 328         info->fix.xpanstep = 0;
 329         info->fix.ypanstep = 0;
 330         info->fix.type_aux = 0;
 331         info->fix.accel = FB_ACCEL_NONE;
 332 }
 333
 334
 335 static int __devinit platinum_init_fb(struct fb_info *info)
 336 {
 337         struct fb_info_platinum *pinfo = info->par;
 338         struct fb_var_screeninfo var;
 339         int sense, rc;
 340
 341         sense = read_platinum_sense(pinfo);
 342         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 343
 344         if (default_vmode == VMODE_NVRAM) {
 345                 default_vmode = nvram_read_byte(NV_VMODE);
 346                 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 347                     !platinum_reg_init[default_vmode-1])
 348                         default_vmode = VMODE_CHOOSE;
 349         }
 350         if (default_vmode == VMODE_CHOOSE) {
 351                 default_vmode = mac_map_monitor_sense(sense);
 352         }
 353         if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 354                 default_vmode = VMODE_640_480_60;
 355         if (default_cmode == CMODE_NVRAM)
 356                 default_cmode = nvram_read_byte(NV_CMODE);
 357         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 358                 default_cmode = CMODE_8;
 359         /*
 360          * Reduce the pixel size if we don't have enough VRAM.
 361          */
 362         while(default_cmode > CMODE_8 &&
 363               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 364                 default_cmode--;
 365
 366         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 367
 368         /* Setup default var */
 369         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 370                 /* This shouldn't happen! */
 371                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 372 try_again:
 373                 default_vmode = VMODE_640_480_60;
 374                 default_cmode = CMODE_8;
 375                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 376                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 377                         return -ENXIO;
 378                 }
 379         }
 380
 381         /* Initialize info structure */
 382         platinum_init_info(info, pinfo);
 383
 384         /* Apply default var */
 385         info->var = var;
 386         var.activate = FB_ACTIVATE_NOW;
 387         rc = fb_set_var(info, &var);
 388         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 389                 goto try_again;
 390
 391         /* Register with fbdev layer */
 392         rc = register_framebuffer(info);
 393         if (rc < 0)
 394                 return rc;
 395
 396         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 397
 398         return 0;
 399 }
 400
 401 /*
 402  * Get the monitor sense value.
 403  * Note that this can be called before calibrate_delay,
 404  * so we can't use udelay.
 405  */
 406 static int read_platinum_sense(struct fb_info_platinum *info)
 407 {
 408         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 409         int sense;
 410
 411         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 412         __delay(2000);
 413         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 414
 415         /* drive each sense line low in turn and collect the other 2 */
 416         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 417         __delay(2000);
 418         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 419         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 420         __delay(2000);
 421         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 422         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 423         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 424         __delay(2000);
 425         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 426
 427         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 428
 429         return sense;
 430 }
 431
 432 /*
 433  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 434  * It also updates the var structure to the actual mode data obtained
 435  */
 436 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 437                                struct fb_info_platinum *pinfo,
 438                                int check_only)
 439 {
 440         int vmode, cmode;
 441
 442         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 443                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 444                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 445                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 446                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 447                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 448                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 449                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 450                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 451                 return -EINVAL;
 452         }
 453
 454         if (!platinum_reg_init[vmode-1]) {
 455                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 456                 return -EINVAL;
 457         }
 458
 459         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 460                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 461                 return -EINVAL;
 462         }
 463
 464         if (mac_vmode_to_var(vmode, cmode, var))
 465                 return -EINVAL;
 466
 467         if (check_only)
 468                 return 0;
 469
 470         pinfo->vmode = vmode;
 471         pinfo->cmode = cmode;
 472         pinfo->xres = vmode_attrs[vmode-1].hres;
 473         pinfo->yres = vmode_attrs[vmode-1].vres;
 474         pinfo->xoffset = 0;
 475         pinfo->yoffset = 0;
 476         pinfo->vxres = pinfo->xres;
 477         pinfo->vyres = pinfo->yres;
 478
 479         return 0;
 480 }
 481
 482
 483 /*
 484  * Parse user speficied options (`video=platinumfb:')
 485  */
 486 static int __init platinumfb_setup(char *options)
 487 {
 488         char *this_opt;
 489
 490         if (!options || !*options)
 491                 return 0;
 492
 493         while ((this_opt = strsep(&options, ",")) != NULL) {
 494                 if (!strncmp(this_opt, "vmode:", 6)) {
 495                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 496                         if (vmode > 0 && vmode <= VMODE_MAX)
 497                                 default_vmode = vmode;
 498                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 499                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 500                         switch (depth) {
 501                          case 0:
 502                          case 8:
 503                             default_cmode = CMODE_8;
 504                             break;
 505                          case 15:
 506                          case 16:
 507                             default_cmode = CMODE_16;
 508                             break;
 509                          case 24:
 510                          case 32:
 511                             default_cmode = CMODE_32;
 512                             break;
 513                         }
 514                 }
 515         }
 516         return 0;
 517 }
 518
 519 #ifdef __powerpc__
 520 #define invalidate_cache(addr) \
 521         asm volatile("eieio; dcbf 0,%1" \
 522         : "=m" (*(addr)) : "r" (addr) : "memory");
 523 #else
 524 #define invalidate_cache(addr)
 525 #endif
 526
 527 static int __devinit platinumfb_probe(struct of_device* odev,
 528                                       const struct of_device_id *match)
 529 {
 530         struct device_node      *dp = odev->node;
 531         struct fb_info          *info;
 532         struct fb_info_platinum *pinfo;
 533         volatile __u8           *fbuffer;
 534         int                     bank0, bank1, bank2, bank3, rc;
 535
 536         printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n");
 537
 538         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 539         if (info == NULL)
 540                 return -ENOMEM;
 541         pinfo = info->par;
 542
 543         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 544             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 545                 printk(KERN_ERR "platinumfb: Can't get resources\n");
 546                 framebuffer_release(info);
 547                 return -ENXIO;
 548         }
 549         if (!request_mem_region(pinfo->rsrc_reg.start,
 550                                 pinfo->rsrc_reg.start -
 551                                 pinfo->rsrc_reg.end + 1,
 552                                 "platinumfb registers")) {
 553                 framebuffer_release(info);
 554                 return -ENXIO;
 555         }
 556         if (!request_mem_region(pinfo->rsrc_fb.start,
 557                                 pinfo->rsrc_fb.start
 558                                 - pinfo->rsrc_fb.end + 1,
 559                                 "platinumfb framebuffer")) {
 560                 release_mem_region(pinfo->rsrc_reg.start,
 561                                    pinfo->rsrc_reg.end -
 562                                    pinfo->rsrc_reg.start + 1);
 563                 framebuffer_release(info);
 564                 return -ENXIO;
 565         }
 566
 567         /* frame buffer - map only 4MB */
 568         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 569         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 570                                         _PAGE_WRITETHRU);
 571         pinfo->base_frame_buffer = pinfo->frame_buffer;
 572
 573         /* registers */
 574         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 575         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 576
 577         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 578         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 579         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 580
 581         /* Grok total video ram */
 582         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 583         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 584         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 585
 586         fbuffer = pinfo->base_frame_buffer;
 587         fbuffer[0x100000] = 0x34;
 588         fbuffer[0x100008] = 0x0;
 589         invalidate_cache(&fbuffer[0x100000]);
 590         fbuffer[0x200000] = 0x56;
 591         fbuffer[0x200008] = 0x0;
 592         invalidate_cache(&fbuffer[0x200000]);
 593         fbuffer[0x300000] = 0x78;
 594         fbuffer[0x300008] = 0x0;
 595         invalidate_cache(&fbuffer[0x300000]);
 596         bank0 = 1; /* builtin 1MB vram, always there */
 597         bank1 = fbuffer[0x100000] == 0x34;
 598         bank2 = fbuffer[0x200000] == 0x56;
 599         bank3 = fbuffer[0x300000] == 0x78;
 600         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 601         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024),
 602                bank3, bank2, bank1, bank0);
 603
 604         /*
 605          * Try to determine whether we have an old or a new DACula.
 606          */
 607         out_8(&pinfo->cmap_regs->addr, 0x40);
 608         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 609         switch (pinfo->dactype) {
 610         case 0x3c:
 611                 pinfo->clktype = 1;
 612                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 613                 break;
 614         case 0x84:
 615                 pinfo->clktype = 0;
 616                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 617                 break;
 618         default:
 619                 pinfo->clktype = 0;
 620                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 621                 break;
 622         }
 623         dev_set_drvdata(&odev->dev, info);
 624
 625         rc = platinum_init_fb(info);
 626         if (rc != 0) {
 627                 dev_set_drvdata(&odev->dev, NULL);
 628                 framebuffer_release(info);
 629         }
 630
 631         return rc;
 632 }
 633
 634 static int __devexit platinumfb_remove(struct of_device* odev)
 635 {
 636         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 637         struct fb_info_platinum *pinfo = info->par;
 638
 639         unregister_framebuffer (info);
 640
 641         /* Unmap frame buffer and registers */
 642         release_mem_region(pinfo->rsrc_fb.start,
 643                            pinfo->rsrc_fb.end -
 644                            pinfo->rsrc_fb.start + 1);
 645         release_mem_region(pinfo->rsrc_reg.start,
 646                            pinfo->rsrc_reg.end -
 647                            pinfo->rsrc_reg.start + 1);
 648         iounmap(pinfo->frame_buffer);
 649         iounmap(pinfo->platinum_regs);
 650         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 651         iounmap(pinfo->cmap_regs);
 652
 653         framebuffer_release(info);
 654
 655         return 0;
 656 }
 657
 658 static struct of_device_id platinumfb_match[] =
 659 {
 660         {
 661         .name           = "platinum",
 662         },
 663         {},
 664 };
 665
 666 static struct of_platform_driver platinum_driver =
 667 {
 668         .name           = "platinumfb",
 669         .match_table    = platinumfb_match,
 670         .probe          = platinumfb_probe,
 671         .remove         = platinumfb_remove,
 672 };
 673
 674 static int __init platinumfb_init(void)
 675 {
 676 #ifndef MODULE
 677         char *option = NULL;
 678
 679         if (fb_get_options("platinumfb", &option))
 680                 return -ENODEV;
 681         platinumfb_setup(option);
 682 #endif
 683         of_register_driver(&platinum_driver);
 684
 685         return 0;
 686 }
 687
 688 static void __exit platinumfb_exit(void)
 689 {
 690         of_unregister_driver(&platinum_driver);
 691 }
 692
 693 MODULE_LICENSE("GPL");
 694 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 695 module_init(platinumfb_init);
 696
 697 #ifdef MODULE
 698 module_exit(platinumfb_exit);
 699 #endif