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/slab.h>
  26 #include <linux/vmalloc.h>
  27 #include <linux/delay.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/fb.h>
  30 #include <linux/init.h>
  31 #include <linux/nvram.h>
  32 #include <asm/io.h>
  33 #include <asm/prom.h>
  34 #include <asm/pgtable.h>
  35 #include <asm/of_device.h>
  36 #include <asm/of_platform.h>
  37
  38 #include "macmodes.h"
  39 #include "platinumfb.h"
  40
  41 static int default_vmode = VMODE_NVRAM;
  42 static int default_cmode = CMODE_NVRAM;
  43
  44 struct fb_info_platinum {
  45         struct fb_info                  *info;
  46
  47         int                             vmode, cmode;
  48         int                             xres, yres;
  49         int                             vxres, vyres;
  50         int                             xoffset, yoffset;
  51
  52         struct {
  53                 __u8 red, green, blue;
  54         }                               palette[256];
  55         u32                             pseudo_palette[17];
  56
  57         volatile struct cmap_regs       __iomem *cmap_regs;
  58         unsigned long                   cmap_regs_phys;
  59
  60         volatile struct platinum_regs   __iomem *platinum_regs;
  61         unsigned long                   platinum_regs_phys;
  62
  63         __u8                            __iomem *frame_buffer;
  64         volatile __u8                   __iomem *base_frame_buffer;
  65         unsigned long                   frame_buffer_phys;
  66
  67         unsigned long                   total_vram;
  68         int                             clktype;
  69         int                             dactype;
  70
  71         struct resource                 rsrc_fb, rsrc_reg;
  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 static struct fb_ops platinumfb_ops = {
 101         .owner =        THIS_MODULE,
 102         .fb_check_var   = platinumfb_check_var,
 103         .fb_set_par     = platinumfb_set_par,
 104         .fb_setcolreg   = platinumfb_setcolreg,
 105         .fb_blank       = platinumfb_blank,
 106         .fb_fillrect    = cfb_fillrect,
 107         .fb_copyarea    = cfb_copyarea,
 108         .fb_imageblit   = cfb_imageblit,
 109 };
 110
 111 /*
 112  * Checks a var structure
 113  */
 114 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 115 {
 116         return platinum_var_to_par(var, info->par, 1);
 117 }
 118
 119 /*
 120  * Applies current var to display
 121  */
 122 static int platinumfb_set_par (struct fb_info *info)
 123 {
 124         struct fb_info_platinum *pinfo = info->par;
 125         struct platinum_regvals *init;
 126         int err, offset = 0x20;
 127
 128         if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 129                 printk (KERN_ERR "platinumfb_set_par: error calling"
 130                                  " platinum_var_to_par: %d.\n", err);
 131                 return err;
 132         }
 133
 134         platinum_set_hardware(pinfo);
 135
 136         init = platinum_reg_init[pinfo->vmode-1];
 137
 138         if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 139                 offset = 0x10;
 140
 141         info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 142         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 143         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 144                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 145         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 146                 + offset;
 147         printk("line_length: %x\n", info->fix.line_length);
 148         return 0;
 149 }
 150
 151 static int platinumfb_blank(int blank,  struct fb_info *fb)
 152 {
 153 /*
 154  *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 155  *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 156  *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 157  *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 158  *  and powerdown modes on hardware that supports disabling hsync/vsync:
 159  *    blank_mode == 2: suspend vsync
 160  *    blank_mode == 3: suspend hsync
 161  *    blank_mode == 4: powerdown
 162  */
 163 /* [danj] I think there's something fishy about those constants... */
 164 /*
 165         struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 166         int     ctrl;
 167
 168         ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
 169         if (blank)
 170                 --blank_mode;
 171         if (blank & VESA_VSYNC_SUSPEND)
 172                 ctrl &= ~3;
 173         if (blank & VESA_HSYNC_SUSPEND)
 174                 ctrl &= ~0x30;
 175         out_le32(&info->platinum_regs->ctrl.r, ctrl);
 176 */
 177 /* TODO: Figure out how the heck to powerdown this thing! */
 178         return 0;
 179 }
 180
 181 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 182                               u_int transp, struct fb_info *info)
 183 {
 184         struct fb_info_platinum *pinfo = info->par;
 185         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 186
 187         if (regno > 255)
 188                 return 1;
 189
 190         red >>= 8;
 191         green >>= 8;
 192         blue >>= 8;
 193
 194         pinfo->palette[regno].red = red;
 195         pinfo->palette[regno].green = green;
 196         pinfo->palette[regno].blue = blue;
 197
 198         out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 199         out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 200         out_8(&cmap_regs->lut, green);          /* a time...                    */
 201         out_8(&cmap_regs->lut, blue);
 202
 203         if (regno < 16) {
 204                 int i;
 205                 u32 *pal = info->pseudo_palette;
 206                 switch (pinfo->cmode) {
 207                 case CMODE_16:
 208                         pal[regno] = (regno << 10) | (regno << 5) | regno;
 209                         break;
 210                 case CMODE_32:
 211                         i = (regno << 8) | regno;
 212                         pal[regno] = (i << 16) | i;
 213                         break;
 214                 }
 215         }
 216
 217         return 0;
 218 }
 219
 220 static inline int platinum_vram_reqd(int video_mode, int color_mode)
 221 {
 222         return vmode_attrs[video_mode-1].vres *
 223                (vmode_attrs[video_mode-1].hres * (1<<color_mode) +
 224                 ((video_mode == VMODE_832_624_75) &&
 225                  (color_mode > CMODE_8)) ? 0x10 : 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         if (default_vmode == VMODE_NVRAM) {
 343 #ifdef CONFIG_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 #endif
 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 #ifdef CONFIG_NVRAM
 356         if (default_cmode == CMODE_NVRAM)
 357                 default_cmode = nvram_read_byte(NV_CMODE);
 358 #endif
 359         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 360                 default_cmode = CMODE_8;
 361         /*
 362          * Reduce the pixel size if we don't have enough VRAM.
 363          */
 364         while(default_cmode > CMODE_8 &&
 365               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 366                 default_cmode--;
 367
 368         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 369
 370         /* Setup default var */
 371         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 372                 /* This shouldn't happen! */
 373                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 374 try_again:
 375                 default_vmode = VMODE_640_480_60;
 376                 default_cmode = CMODE_8;
 377                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 378                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 379                         return -ENXIO;
 380                 }
 381         }
 382
 383         /* Initialize info structure */
 384         platinum_init_info(info, pinfo);
 385
 386         /* Apply default var */
 387         info->var = var;
 388         var.activate = FB_ACTIVATE_NOW;
 389         rc = fb_set_var(info, &var);
 390         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 391                 goto try_again;
 392
 393         /* Register with fbdev layer */
 394         rc = register_framebuffer(info);
 395         if (rc < 0)
 396                 return rc;
 397
 398         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 399
 400         return 0;
 401 }
 402
 403 /*
 404  * Get the monitor sense value.
 405  * Note that this can be called before calibrate_delay,
 406  * so we can't use udelay.
 407  */
 408 static int read_platinum_sense(struct fb_info_platinum *info)
 409 {
 410         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 411         int sense;
 412
 413         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 414         __delay(2000);
 415         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 416
 417         /* drive each sense line low in turn and collect the other 2 */
 418         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 419         __delay(2000);
 420         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 421         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 422         __delay(2000);
 423         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 424         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 425         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 426         __delay(2000);
 427         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 428
 429         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 430
 431         return sense;
 432 }
 433
 434 /*
 435  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 436  * It also updates the var structure to the actual mode data obtained
 437  */
 438 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 439                                struct fb_info_platinum *pinfo,
 440                                int check_only)
 441 {
 442         int vmode, cmode;
 443
 444         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 445                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 446                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 447                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 448                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 449                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 450                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 451                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 452                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 453                 return -EINVAL;
 454         }
 455
 456         if (!platinum_reg_init[vmode-1]) {
 457                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 458                 return -EINVAL;
 459         }
 460
 461         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 462                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 463                 return -EINVAL;
 464         }
 465
 466         if (mac_vmode_to_var(vmode, cmode, var))
 467                 return -EINVAL;
 468
 469         if (check_only)
 470                 return 0;
 471
 472         pinfo->vmode = vmode;
 473         pinfo->cmode = cmode;
 474         pinfo->xres = vmode_attrs[vmode-1].hres;
 475         pinfo->yres = vmode_attrs[vmode-1].vres;
 476         pinfo->xoffset = 0;
 477         pinfo->yoffset = 0;
 478         pinfo->vxres = pinfo->xres;
 479         pinfo->vyres = pinfo->yres;
 480
 481         return 0;
 482 }
 483
 484
 485 /*
 486  * Parse user speficied options (`video=platinumfb:')
 487  */
 488 static int __init platinumfb_setup(char *options)
 489 {
 490         char *this_opt;
 491
 492         if (!options || !*options)
 493                 return 0;
 494
 495         while ((this_opt = strsep(&options, ",")) != NULL) {
 496                 if (!strncmp(this_opt, "vmode:", 6)) {
 497                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 498                         if (vmode > 0 && vmode <= VMODE_MAX)
 499                                 default_vmode = vmode;
 500                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 501                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 502                         switch (depth) {
 503                          case 0:
 504                          case 8:
 505                             default_cmode = CMODE_8;
 506                             break;
 507                          case 15:
 508                          case 16:
 509                             default_cmode = CMODE_16;
 510                             break;
 511                          case 24:
 512                          case 32:
 513                             default_cmode = CMODE_32;
 514                             break;
 515                         }
 516                 }
 517         }
 518         return 0;
 519 }
 520
 521 #ifdef __powerpc__
 522 #define invalidate_cache(addr) \
 523         asm volatile("eieio; dcbf 0,%1" \
 524         : "=m" (*(addr)) : "r" (addr) : "memory");
 525 #else
 526 #define invalidate_cache(addr)
 527 #endif
 528
 529 static int __devinit platinumfb_probe(struct of_device* odev,
 530                                       const struct of_device_id *match)
 531 {
 532         struct device_node      *dp = odev->node;
 533         struct fb_info          *info;
 534         struct fb_info_platinum *pinfo;
 535         volatile __u8           *fbuffer;
 536         int                     bank0, bank1, bank2, bank3, rc;
 537
 538         printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n");
 539
 540         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 541         if (info == NULL)
 542                 return -ENOMEM;
 543         pinfo = info->par;
 544
 545         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 546             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 547                 printk(KERN_ERR "platinumfb: Can't get resources\n");
 548                 framebuffer_release(info);
 549                 return -ENXIO;
 550         }
 551         if (!request_mem_region(pinfo->rsrc_reg.start,
 552                                 pinfo->rsrc_reg.start -
 553                                 pinfo->rsrc_reg.end + 1,
 554                                 "platinumfb registers")) {
 555                 framebuffer_release(info);
 556                 return -ENXIO;
 557         }
 558         if (!request_mem_region(pinfo->rsrc_fb.start,
 559                                 pinfo->rsrc_fb.start
 560                                 - pinfo->rsrc_fb.end + 1,
 561                                 "platinumfb framebuffer")) {
 562                 release_mem_region(pinfo->rsrc_reg.start,
 563                                    pinfo->rsrc_reg.end -
 564                                    pinfo->rsrc_reg.start + 1);
 565                 framebuffer_release(info);
 566                 return -ENXIO;
 567         }
 568
 569         /* frame buffer - map only 4MB */
 570         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 571         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 572                                         _PAGE_WRITETHRU);
 573         pinfo->base_frame_buffer = pinfo->frame_buffer;
 574
 575         /* registers */
 576         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 577         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 578
 579         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 580         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 581         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 582
 583         /* Grok total video ram */
 584         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 585         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 586         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 587
 588         fbuffer = pinfo->base_frame_buffer;
 589         fbuffer[0x100000] = 0x34;
 590         fbuffer[0x100008] = 0x0;
 591         invalidate_cache(&fbuffer[0x100000]);
 592         fbuffer[0x200000] = 0x56;
 593         fbuffer[0x200008] = 0x0;
 594         invalidate_cache(&fbuffer[0x200000]);
 595         fbuffer[0x300000] = 0x78;
 596         fbuffer[0x300008] = 0x0;
 597         invalidate_cache(&fbuffer[0x300000]);
 598         bank0 = 1; /* builtin 1MB vram, always there */
 599         bank1 = fbuffer[0x100000] == 0x34;
 600         bank2 = fbuffer[0x200000] == 0x56;
 601         bank3 = fbuffer[0x300000] == 0x78;
 602         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 603         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024),
 604                bank3, bank2, bank1, bank0);
 605
 606         /*
 607          * Try to determine whether we have an old or a new DACula.
 608          */
 609         out_8(&pinfo->cmap_regs->addr, 0x40);
 610         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 611         switch (pinfo->dactype) {
 612         case 0x3c:
 613                 pinfo->clktype = 1;
 614                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 615                 break;
 616         case 0x84:
 617                 pinfo->clktype = 0;
 618                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 619                 break;
 620         default:
 621                 pinfo->clktype = 0;
 622                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 623                 break;
 624         }
 625         dev_set_drvdata(&odev->dev, info);
 626
 627         rc = platinum_init_fb(info);
 628         if (rc != 0) {
 629                 iounmap(pinfo->frame_buffer);
 630                 iounmap(pinfo->platinum_regs);
 631                 iounmap(pinfo->cmap_regs);
 632                 dev_set_drvdata(&odev->dev, NULL);
 633                 framebuffer_release(info);
 634         }
 635
 636         return rc;
 637 }
 638
 639 static int __devexit platinumfb_remove(struct of_device* odev)
 640 {
 641         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 642         struct fb_info_platinum *pinfo = info->par;
 643
 644         unregister_framebuffer (info);
 645
 646         /* Unmap frame buffer and registers */
 647         release_mem_region(pinfo->rsrc_fb.start,
 648                            pinfo->rsrc_fb.end -
 649                            pinfo->rsrc_fb.start + 1);
 650         release_mem_region(pinfo->rsrc_reg.start,
 651                            pinfo->rsrc_reg.end -
 652                            pinfo->rsrc_reg.start + 1);
 653         iounmap(pinfo->frame_buffer);
 654         iounmap(pinfo->platinum_regs);
 655         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 656         iounmap(pinfo->cmap_regs);
 657
 658         framebuffer_release(info);
 659
 660         return 0;
 661 }
 662
 663 static struct of_device_id platinumfb_match[] =
 664 {
 665         {
 666         .name           = "platinum",
 667         },
 668         {},
 669 };
 670
 671 static struct of_platform_driver platinum_driver =
 672 {
 673         .name           = "platinumfb",
 674         .match_table    = platinumfb_match,
 675         .probe          = platinumfb_probe,
 676         .remove         = platinumfb_remove,
 677 };
 678
 679 static int __init platinumfb_init(void)
 680 {
 681 #ifndef MODULE
 682         char *option = NULL;
 683
 684         if (fb_get_options("platinumfb", &option))
 685                 return -ENODEV;
 686         platinumfb_setup(option);
 687 #endif
 688         of_register_platform_driver(&platinum_driver);
 689
 690         return 0;
 691 }
 692
 693 static void __exit platinumfb_exit(void)
 694 {
 695         of_unregister_platform_driver(&platinum_driver);
 696 }
 697
 698 MODULE_LICENSE("GPL");
 699 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 700 module_init(platinumfb_init);
 701
 702 #ifdef MODULE
 703 module_exit(platinumfb_exit);
 704 #endif