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 #undef DEBUG
  21
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/errno.h>
  25 #include <linux/string.h>
  26 #include <linux/mm.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/nvram.h>
  34 #include <linux/of_device.h>
  35 #include <linux/of_platform.h>
  36 #include <asm/io.h>
  37 #include <asm/prom.h>
  38 #include <asm/pgtable.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[16];
  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         struct resource                 rsrc_fb, rsrc_reg;
  74 };
  75
  76 /*
  77  * Frame buffer device API
  78  */
  79
  80 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  81         u_int transp, struct fb_info *info);
  82 static int platinumfb_blank(int blank_mode, struct fb_info *info);
  83 static int platinumfb_set_par (struct fb_info *info);
  84 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  85
  86 /*
  87  * internal functions
  88  */
  89
  90 static inline int platinum_vram_reqd(int video_mode, int color_mode);
  91 static int read_platinum_sense(struct fb_info_platinum *pinfo);
  92 static void set_platinum_clock(struct fb_info_platinum *pinfo);
  93 static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  94 static int platinum_var_to_par(struct fb_var_screeninfo *var,
  95                                struct fb_info_platinum *pinfo,
  96                                int check_only);
  97
  98 /*
  99  * Interface used by the world
 100  */
 101
 102 static struct fb_ops platinumfb_ops = {
 103         .owner =        THIS_MODULE,
 104         .fb_check_var   = platinumfb_check_var,
 105         .fb_set_par     = platinumfb_set_par,
 106         .fb_setcolreg   = platinumfb_setcolreg,
 107         .fb_blank       = platinumfb_blank,
 108         .fb_fillrect    = cfb_fillrect,
 109         .fb_copyarea    = cfb_copyarea,
 110         .fb_imageblit   = cfb_imageblit,
 111 };
 112
 113 /*
 114  * Checks a var structure
 115  */
 116 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 117 {
 118         return platinum_var_to_par(var, info->par, 1);
 119 }
 120
 121 /*
 122  * Applies current var to display
 123  */
 124 static int platinumfb_set_par (struct fb_info *info)
 125 {
 126         struct fb_info_platinum *pinfo = info->par;
 127         struct platinum_regvals *init;
 128         int err, offset = 0x20;
 129
 130         if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 131                 printk (KERN_ERR "platinumfb_set_par: error calling"
 132                                  " platinum_var_to_par: %d.\n", err);
 133                 return err;
 134         }
 135
 136         platinum_set_hardware(pinfo);
 137
 138         init = platinum_reg_init[pinfo->vmode-1];
 139
 140         if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 141                 offset = 0x10;
 142
 143         info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 144         mutex_lock(&info->mm_lock);
 145         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 146         mutex_unlock(&info->mm_lock);
 147         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 148                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 149         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 150                 + offset;
 151         printk("line_length: %x\n", info->fix.line_length);
 152         return 0;
 153 }
 154
 155 static int platinumfb_blank(int blank,  struct fb_info *fb)
 156 {
 157 /*
 158  *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 159  *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 160  *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 161  *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 162  *  and powerdown modes on hardware that supports disabling hsync/vsync:
 163  *    blank_mode == 2: suspend vsync
 164  *    blank_mode == 3: suspend hsync
 165  *    blank_mode == 4: powerdown
 166  */
 167 /* [danj] I think there's something fishy about those constants... */
 168 /*
 169         struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 170         int     ctrl;
 171
 172         ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
 173         if (blank)
 174                 --blank_mode;
 175         if (blank & VESA_VSYNC_SUSPEND)
 176                 ctrl &= ~3;
 177         if (blank & VESA_HSYNC_SUSPEND)
 178                 ctrl &= ~0x30;
 179         out_le32(&info->platinum_regs->ctrl.r, ctrl);
 180 */
 181 /* TODO: Figure out how the heck to powerdown this thing! */
 182         return 0;
 183 }
 184
 185 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 186                               u_int transp, struct fb_info *info)
 187 {
 188         struct fb_info_platinum *pinfo = info->par;
 189         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 190
 191         if (regno > 255)
 192                 return 1;
 193
 194         red >>= 8;
 195         green >>= 8;
 196         blue >>= 8;
 197
 198         pinfo->palette[regno].red = red;
 199         pinfo->palette[regno].green = green;
 200         pinfo->palette[regno].blue = blue;
 201
 202         out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 203         out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 204         out_8(&cmap_regs->lut, green);          /* a time...                    */
 205         out_8(&cmap_regs->lut, blue);
 206
 207         if (regno < 16) {
 208                 int i;
 209                 u32 *pal = info->pseudo_palette;
 210                 switch (pinfo->cmode) {
 211                 case CMODE_16:
 212                         pal[regno] = (regno << 10) | (regno << 5) | regno;
 213                         break;
 214                 case CMODE_32:
 215                         i = (regno << 8) | regno;
 216                         pal[regno] = (i << 16) | i;
 217                         break;
 218                 }
 219         }
 220
 221         return 0;
 222 }
 223
 224 static inline int platinum_vram_reqd(int video_mode, int color_mode)
 225 {
 226         return vmode_attrs[video_mode-1].vres *
 227                (vmode_attrs[video_mode-1].hres * (1<<color_mode) +
 228                 ((video_mode == VMODE_832_624_75) &&
 229                  (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000;
 230 }
 231
 232 #define STORE_D2(a, d) { \
 233         out_8(&cmap_regs->addr, (a+32)); \
 234         out_8(&cmap_regs->d2, (d)); \
 235 }
 236
 237 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 238 {
 239         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 240         struct platinum_regvals *init;
 241
 242         init = platinum_reg_init[pinfo->vmode-1];
 243
 244         STORE_D2(6, 0xc6);
 245         out_8(&cmap_regs->addr,3+32);
 246
 247         if (in_8(&cmap_regs->d2) == 2) {
 248                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 249                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 250                 STORE_D2(3, 3);
 251         } else {
 252                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 253                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 254                 STORE_D2(3, 2);
 255         }
 256
 257         __delay(5000);
 258         STORE_D2(9, 0xa6);
 259 }
 260
 261
 262 /* Now how about actually saying, Make it so! */
 263 /* Some things in here probably don't need to be done each time. */
 264 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 265 {
 266         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 267         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 268         struct platinum_regvals         *init;
 269         int                             i;
 270         int                             vmode, cmode;
 271
 272         vmode = pinfo->vmode;
 273         cmode = pinfo->cmode;
 274
 275         init = platinum_reg_init[vmode - 1];
 276
 277         /* Initialize display timing registers */
 278         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 279
 280         for (i = 0; i < 26; ++i)
 281                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 282
 283         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 284                                                 init->offset[cmode] + 4 - cmode :
 285                                                 init->offset[cmode]));
 286         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 287         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 288         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 289                                              init->mode[cmode+1] :
 290                                              init->mode[cmode]));
 291         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 292         out_be32(&platinum_regs->reg[21].r, 0x100);
 293         out_be32(&platinum_regs->reg[22].r, 1);
 294         out_be32(&platinum_regs->reg[23].r, 1);
 295         out_be32(&platinum_regs->reg[26].r, 0xc00);
 296         out_be32(&platinum_regs->reg[27].r, 0x235);
 297         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 298
 299         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 300                      init->dacula_ctrl[cmode] & 0xf :
 301                      init->dacula_ctrl[cmode]));
 302         STORE_D2(1, 4);
 303         STORE_D2(2, 0);
 304
 305         set_platinum_clock(pinfo);
 306
 307         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 308 }
 309
 310 /*
 311  * Set misc info vars for this driver
 312  */
 313 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
 314 {
 315         /* Fill fb_info */
 316         info->fbops = &platinumfb_ops;
 317         info->pseudo_palette = pinfo->pseudo_palette;
 318         info->flags = FBINFO_DEFAULT;
 319         info->screen_base = pinfo->frame_buffer + 0x20;
 320
 321         fb_alloc_cmap(&info->cmap, 256, 0);
 322
 323         /* Fill fix common fields */
 324         strcpy(info->fix.id, "platinum");
 325         info->fix.mmio_start = pinfo->platinum_regs_phys;
 326         info->fix.mmio_len = 0x1000;
 327         info->fix.type = FB_TYPE_PACKED_PIXELS;
 328         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 329         info->fix.smem_len = pinfo->total_vram - 0x20;
 330         info->fix.ywrapstep = 0;
 331         info->fix.xpanstep = 0;
 332         info->fix.ypanstep = 0;
 333         info->fix.type_aux = 0;
 334         info->fix.accel = FB_ACCEL_NONE;
 335 }
 336
 337
 338 static int __devinit platinum_init_fb(struct fb_info *info)
 339 {
 340         struct fb_info_platinum *pinfo = info->par;
 341         struct fb_var_screeninfo var;
 342         int sense, rc;
 343
 344         sense = read_platinum_sense(pinfo);
 345         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 346         if (default_vmode == VMODE_NVRAM) {
 347 #ifdef CONFIG_NVRAM
 348                 default_vmode = nvram_read_byte(NV_VMODE);
 349                 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 350                     !platinum_reg_init[default_vmode-1])
 351 #endif
 352                         default_vmode = VMODE_CHOOSE;
 353         }
 354         if (default_vmode == VMODE_CHOOSE) {
 355                 default_vmode = mac_map_monitor_sense(sense);
 356         }
 357         if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 358                 default_vmode = VMODE_640_480_60;
 359 #ifdef CONFIG_NVRAM
 360         if (default_cmode == CMODE_NVRAM)
 361                 default_cmode = nvram_read_byte(NV_CMODE);
 362 #endif
 363         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 364                 default_cmode = CMODE_8;
 365         /*
 366          * Reduce the pixel size if we don't have enough VRAM.
 367          */
 368         while(default_cmode > CMODE_8 &&
 369               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 370                 default_cmode--;
 371
 372         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 373
 374         /* Setup default var */
 375         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 376                 /* This shouldn't happen! */
 377                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 378 try_again:
 379                 default_vmode = VMODE_640_480_60;
 380                 default_cmode = CMODE_8;
 381                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 382                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 383                         return -ENXIO;
 384                 }
 385         }
 386
 387         /* Initialize info structure */
 388         platinum_init_info(info, pinfo);
 389
 390         /* Apply default var */
 391         info->var = var;
 392         var.activate = FB_ACTIVATE_NOW;
 393         rc = fb_set_var(info, &var);
 394         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 395                 goto try_again;
 396
 397         /* Register with fbdev layer */
 398         rc = register_framebuffer(info);
 399         if (rc < 0)
 400                 return rc;
 401
 402         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 403
 404         return 0;
 405 }
 406
 407 /*
 408  * Get the monitor sense value.
 409  * Note that this can be called before calibrate_delay,
 410  * so we can't use udelay.
 411  */
 412 static int read_platinum_sense(struct fb_info_platinum *info)
 413 {
 414         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 415         int sense;
 416
 417         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 418         __delay(2000);
 419         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 420
 421         /* drive each sense line low in turn and collect the other 2 */
 422         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 423         __delay(2000);
 424         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 425         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 426         __delay(2000);
 427         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 428         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 429         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 430         __delay(2000);
 431         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 432
 433         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 434
 435         return sense;
 436 }
 437
 438 /*
 439  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 440  * It also updates the var structure to the actual mode data obtained
 441  */
 442 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 443                                struct fb_info_platinum *pinfo,
 444                                int check_only)
 445 {
 446         int vmode, cmode;
 447
 448         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 449                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 450                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 451                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 452                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 453                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 454                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 455                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 456                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 457                 return -EINVAL;
 458         }
 459
 460         if (!platinum_reg_init[vmode-1]) {
 461                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 462                 return -EINVAL;
 463         }
 464
 465         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 466                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 467                 return -EINVAL;
 468         }
 469
 470         if (mac_vmode_to_var(vmode, cmode, var))
 471                 return -EINVAL;
 472
 473         if (check_only)
 474                 return 0;
 475
 476         pinfo->vmode = vmode;
 477         pinfo->cmode = cmode;
 478         pinfo->xres = vmode_attrs[vmode-1].hres;
 479         pinfo->yres = vmode_attrs[vmode-1].vres;
 480         pinfo->xoffset = 0;
 481         pinfo->yoffset = 0;
 482         pinfo->vxres = pinfo->xres;
 483         pinfo->vyres = pinfo->yres;
 484
 485         return 0;
 486 }
 487
 488
 489 /*
 490  * Parse user speficied options (`video=platinumfb:')
 491  */
 492 static int __init platinumfb_setup(char *options)
 493 {
 494         char *this_opt;
 495
 496         if (!options || !*options)
 497                 return 0;
 498
 499         while ((this_opt = strsep(&options, ",")) != NULL) {
 500                 if (!strncmp(this_opt, "vmode:", 6)) {
 501                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 502                         if (vmode > 0 && vmode <= VMODE_MAX)
 503                                 default_vmode = vmode;
 504                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 505                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 506                         switch (depth) {
 507                          case 0:
 508                          case 8:
 509                             default_cmode = CMODE_8;
 510                             break;
 511                          case 15:
 512                          case 16:
 513                             default_cmode = CMODE_16;
 514                             break;
 515                          case 24:
 516                          case 32:
 517                             default_cmode = CMODE_32;
 518                             break;
 519                         }
 520                 }
 521         }
 522         return 0;
 523 }
 524
 525 #ifdef __powerpc__
 526 #define invalidate_cache(addr) \
 527         asm volatile("eieio; dcbf 0,%1" \
 528         : "=m" (*(addr)) : "r" (addr) : "memory");
 529 #else
 530 #define invalidate_cache(addr)
 531 #endif
 532
 533 static int __devinit platinumfb_probe(struct of_device* odev,
 534                                       const struct of_device_id *match)
 535 {
 536         struct device_node      *dp = odev->node;
 537         struct fb_info          *info;
 538         struct fb_info_platinum *pinfo;
 539         volatile __u8           *fbuffer;
 540         int                     bank0, bank1, bank2, bank3, rc;
 541
 542         dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 543
 544         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 545         if (info == NULL) {
 546                 dev_err(&odev->dev, "Failed to allocate fbdev !\n");
 547                 return -ENOMEM;
 548         }
 549         pinfo = info->par;
 550
 551         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 552             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 553                 dev_err(&odev->dev, "Can't get resources\n");
 554                 framebuffer_release(info);
 555                 return -ENXIO;
 556         }
 557         dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
 558                 (unsigned long long)pinfo->rsrc_reg.start,
 559                 (unsigned long long)pinfo->rsrc_reg.end);
 560         dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
 561                 (unsigned long long)pinfo->rsrc_fb.start,
 562                 (unsigned long long)pinfo->rsrc_fb.end);
 563
 564         /* Do not try to request register space, they overlap with the
 565          * northbridge and that can fail. Only request framebuffer
 566          */
 567         if (!request_mem_region(pinfo->rsrc_fb.start,
 568                                 pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
 569                                 "platinumfb framebuffer")) {
 570                 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
 571                 framebuffer_release(info);
 572                 return -ENXIO;
 573         }
 574
 575         /* frame buffer - map only 4MB */
 576         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 577         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 578                                         _PAGE_WRITETHRU);
 579         pinfo->base_frame_buffer = pinfo->frame_buffer;
 580
 581         /* registers */
 582         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 583         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 584
 585         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 586         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 587         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 588
 589         /* Grok total video ram */
 590         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 591         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 592         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 593
 594         fbuffer = pinfo->base_frame_buffer;
 595         fbuffer[0x100000] = 0x34;
 596         fbuffer[0x100008] = 0x0;
 597         invalidate_cache(&fbuffer[0x100000]);
 598         fbuffer[0x200000] = 0x56;
 599         fbuffer[0x200008] = 0x0;
 600         invalidate_cache(&fbuffer[0x200000]);
 601         fbuffer[0x300000] = 0x78;
 602         fbuffer[0x300008] = 0x0;
 603         invalidate_cache(&fbuffer[0x300000]);
 604         bank0 = 1; /* builtin 1MB vram, always there */
 605         bank1 = fbuffer[0x100000] == 0x34;
 606         bank2 = fbuffer[0x200000] == 0x56;
 607         bank3 = fbuffer[0x300000] == 0x78;
 608         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 609         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
 610                (unsigned int) (pinfo->total_vram / 1024 / 1024),
 611                bank3, bank2, bank1, bank0);
 612
 613         /*
 614          * Try to determine whether we have an old or a new DACula.
 615          */
 616         out_8(&pinfo->cmap_regs->addr, 0x40);
 617         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 618         switch (pinfo->dactype) {
 619         case 0x3c:
 620                 pinfo->clktype = 1;
 621                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 622                 break;
 623         case 0x84:
 624                 pinfo->clktype = 0;
 625                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 626                 break;
 627         default:
 628                 pinfo->clktype = 0;
 629                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 630                 break;
 631         }
 632         dev_set_drvdata(&odev->dev, info);
 633
 634         rc = platinum_init_fb(info);
 635         if (rc != 0) {
 636                 iounmap(pinfo->frame_buffer);
 637                 iounmap(pinfo->platinum_regs);
 638                 iounmap(pinfo->cmap_regs);
 639                 dev_set_drvdata(&odev->dev, NULL);
 640                 framebuffer_release(info);
 641         }
 642
 643         return rc;
 644 }
 645
 646 static int __devexit platinumfb_remove(struct of_device* odev)
 647 {
 648         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 649         struct fb_info_platinum *pinfo = info->par;
 650
 651         unregister_framebuffer (info);
 652
 653         /* Unmap frame buffer and registers */
 654         iounmap(pinfo->frame_buffer);
 655         iounmap(pinfo->platinum_regs);
 656         iounmap(pinfo->cmap_regs);
 657
 658         release_mem_region(pinfo->rsrc_fb.start,
 659                            pinfo->rsrc_fb.end -
 660                            pinfo->rsrc_fb.start + 1);
 661
 662         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 663
 664         framebuffer_release(info);
 665
 666         return 0;
 667 }
 668
 669 static struct of_device_id platinumfb_match[] =
 670 {
 671         {
 672         .name           = "platinum",
 673         },
 674         {},
 675 };
 676
 677 static struct of_platform_driver platinum_driver =
 678 {
 679         .name           = "platinumfb",
 680         .match_table    = platinumfb_match,
 681         .probe          = platinumfb_probe,
 682         .remove         = platinumfb_remove,
 683 };
 684
 685 static int __init platinumfb_init(void)
 686 {
 687 #ifndef MODULE
 688         char *option = NULL;
 689
 690         if (fb_get_options("platinumfb", &option))
 691                 return -ENODEV;
 692         platinumfb_setup(option);
 693 #endif
 694         of_register_platform_driver(&platinum_driver);
 695
 696         return 0;
 697 }
 698
 699 static void __exit platinumfb_exit(void)
 700 {
 701         of_unregister_platform_driver(&platinum_driver);
 702 }
 703
 704 MODULE_LICENSE("GPL");
 705 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 706 module_init(platinumfb_init);
 707
 708 #ifdef MODULE
 709 module_exit(platinumfb_exit);
 710 #endif