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