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         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         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 145         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 146                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 147         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 148                 + 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) +
 226                 ((video_mode == VMODE_832_624_75) &&
 227                  (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000;
 228 }
 229
 230 #define STORE_D2(a, d) { \
 231         out_8(&cmap_regs->addr, (a+32)); \
 232         out_8(&cmap_regs->d2, (d)); \
 233 }
 234
 235 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 236 {
 237         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 238         struct platinum_regvals *init;
 239
 240         init = platinum_reg_init[pinfo->vmode-1];
 241
 242         STORE_D2(6, 0xc6);
 243         out_8(&cmap_regs->addr,3+32);
 244
 245         if (in_8(&cmap_regs->d2) == 2) {
 246                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 247                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 248                 STORE_D2(3, 3);
 249         } else {
 250                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 251                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 252                 STORE_D2(3, 2);
 253         }
 254
 255         __delay(5000);
 256         STORE_D2(9, 0xa6);
 257 }
 258
 259
 260 /* Now how about actually saying, Make it so! */
 261 /* Some things in here probably don't need to be done each time. */
 262 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 263 {
 264         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 265         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 266         struct platinum_regvals         *init;
 267         int                             i;
 268         int                             vmode, cmode;
 269
 270         vmode = pinfo->vmode;
 271         cmode = pinfo->cmode;
 272
 273         init = platinum_reg_init[vmode - 1];
 274
 275         /* Initialize display timing registers */
 276         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 277
 278         for (i = 0; i < 26; ++i)
 279                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 280
 281         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 282                                                 init->offset[cmode] + 4 - cmode :
 283                                                 init->offset[cmode]));
 284         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 285         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 286         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 287                                              init->mode[cmode+1] :
 288                                              init->mode[cmode]));
 289         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 290         out_be32(&platinum_regs->reg[21].r, 0x100);
 291         out_be32(&platinum_regs->reg[22].r, 1);
 292         out_be32(&platinum_regs->reg[23].r, 1);
 293         out_be32(&platinum_regs->reg[26].r, 0xc00);
 294         out_be32(&platinum_regs->reg[27].r, 0x235);
 295         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 296
 297         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 298                      init->dacula_ctrl[cmode] & 0xf :
 299                      init->dacula_ctrl[cmode]));
 300         STORE_D2(1, 4);
 301         STORE_D2(2, 0);
 302
 303         set_platinum_clock(pinfo);
 304
 305         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 306 }
 307
 308 /*
 309  * Set misc info vars for this driver
 310  */
 311 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
 312 {
 313         /* Fill fb_info */
 314         info->fbops = &platinumfb_ops;
 315         info->pseudo_palette = pinfo->pseudo_palette;
 316         info->flags = FBINFO_DEFAULT;
 317         info->screen_base = pinfo->frame_buffer + 0x20;
 318
 319         fb_alloc_cmap(&info->cmap, 256, 0);
 320
 321         /* Fill fix common fields */
 322         strcpy(info->fix.id, "platinum");
 323         info->fix.mmio_start = pinfo->platinum_regs_phys;
 324         info->fix.mmio_len = 0x1000;
 325         info->fix.type = FB_TYPE_PACKED_PIXELS;
 326         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 327         info->fix.smem_len = pinfo->total_vram - 0x20;
 328         info->fix.ywrapstep = 0;
 329         info->fix.xpanstep = 0;
 330         info->fix.ypanstep = 0;
 331         info->fix.type_aux = 0;
 332         info->fix.accel = FB_ACCEL_NONE;
 333 }
 334
 335
 336 static int __devinit platinum_init_fb(struct fb_info *info)
 337 {
 338         struct fb_info_platinum *pinfo = info->par;
 339         struct fb_var_screeninfo var;
 340         int sense, rc;
 341
 342         sense = read_platinum_sense(pinfo);
 343         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 344
 345         if (default_vmode == VMODE_NVRAM) {
 346                 default_vmode = nvram_read_byte(NV_VMODE);
 347                 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 348                     !platinum_reg_init[default_vmode-1])
 349                         default_vmode = VMODE_CHOOSE;
 350         }
 351         if (default_vmode == VMODE_CHOOSE) {
 352                 default_vmode = mac_map_monitor_sense(sense);
 353         }
 354         if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 355                 default_vmode = VMODE_640_480_60;
 356         if (default_cmode == CMODE_NVRAM)
 357                 default_cmode = nvram_read_byte(NV_CMODE);
 358         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 359                 default_cmode = CMODE_8;
 360         /*
 361          * Reduce the pixel size if we don't have enough VRAM.
 362          */
 363         while(default_cmode > CMODE_8 &&
 364               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 365                 default_cmode--;
 366
 367         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 368
 369         /* Setup default var */
 370         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 371                 /* This shouldn't happen! */
 372                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 373 try_again:
 374                 default_vmode = VMODE_640_480_60;
 375                 default_cmode = CMODE_8;
 376                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 377                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 378                         return -ENXIO;
 379                 }
 380         }
 381
 382         /* Initialize info structure */
 383         platinum_init_info(info, pinfo);
 384
 385         /* Apply default var */
 386         info->var = var;
 387         var.activate = FB_ACTIVATE_NOW;
 388         rc = fb_set_var(info, &var);
 389         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 390                 goto try_again;
 391
 392         /* Register with fbdev layer */
 393         rc = register_framebuffer(info);
 394         if (rc < 0)
 395                 return rc;
 396
 397         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * Get the monitor sense value.
 404  * Note that this can be called before calibrate_delay,
 405  * so we can't use udelay.
 406  */
 407 static int read_platinum_sense(struct fb_info_platinum *info)
 408 {
 409         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 410         int sense;
 411
 412         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 413         __delay(2000);
 414         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 415
 416         /* drive each sense line low in turn and collect the other 2 */
 417         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 418         __delay(2000);
 419         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 420         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 421         __delay(2000);
 422         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 423         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 424         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 425         __delay(2000);
 426         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 427
 428         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 429
 430         return sense;
 431 }
 432
 433 /*
 434  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 435  * It also updates the var structure to the actual mode data obtained
 436  */
 437 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 438                                struct fb_info_platinum *pinfo,
 439                                int check_only)
 440 {
 441         int vmode, cmode;
 442
 443         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 444                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 445                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 446                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 447                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 448                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 449                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 450                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 451                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 452                 return -EINVAL;
 453         }
 454
 455         if (!platinum_reg_init[vmode-1]) {
 456                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 457                 return -EINVAL;
 458         }
 459
 460         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 461                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 462                 return -EINVAL;
 463         }
 464
 465         if (mac_vmode_to_var(vmode, cmode, var))
 466                 return -EINVAL;
 467
 468         if (check_only)
 469                 return 0;
 470
 471         pinfo->vmode = vmode;
 472         pinfo->cmode = cmode;
 473         pinfo->xres = vmode_attrs[vmode-1].hres;
 474         pinfo->yres = vmode_attrs[vmode-1].vres;
 475         pinfo->xoffset = 0;
 476         pinfo->yoffset = 0;
 477         pinfo->vxres = pinfo->xres;
 478         pinfo->vyres = pinfo->yres;
 479
 480         return 0;
 481 }
 482
 483
 484 /*
 485  * Parse user speficied options (`video=platinumfb:')
 486  */
 487 static int __init platinumfb_setup(char *options)
 488 {
 489         char *this_opt;
 490
 491         if (!options || !*options)
 492                 return 0;
 493
 494         while ((this_opt = strsep(&options, ",")) != NULL) {
 495                 if (!strncmp(this_opt, "vmode:", 6)) {
 496                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 497                         if (vmode > 0 && vmode <= VMODE_MAX)
 498                                 default_vmode = vmode;
 499                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 500                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 501                         switch (depth) {
 502                          case 0:
 503                          case 8:
 504                             default_cmode = CMODE_8;
 505                             break;
 506                          case 15:
 507                          case 16:
 508                             default_cmode = CMODE_16;
 509                             break;
 510                          case 24:
 511                          case 32:
 512                             default_cmode = CMODE_32;
 513                             break;
 514                         }
 515                 }
 516         }
 517         return 0;
 518 }
 519
 520 #ifdef __powerpc__
 521 #define invalidate_cache(addr) \
 522         asm volatile("eieio; dcbf 0,%1" \
 523         : "=m" (*(addr)) : "r" (addr) : "memory");
 524 #else
 525 #define invalidate_cache(addr)
 526 #endif
 527
 528 static int __devinit platinumfb_probe(struct of_device* odev,
 529                                       const struct of_device_id *match)
 530 {
 531         struct device_node      *dp = odev->node;
 532         struct fb_info          *info;
 533         struct fb_info_platinum *pinfo;
 534         volatile __u8           *fbuffer;
 535         int                     bank0, bank1, bank2, bank3, rc;
 536
 537         printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n");
 538
 539         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 540         if (info == NULL)
 541                 return -ENOMEM;
 542         pinfo = info->par;
 543
 544         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 545             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 546                 printk(KERN_ERR "platinumfb: Can't get resources\n");
 547                 framebuffer_release(info);
 548                 return -ENXIO;
 549         }
 550         if (!request_mem_region(pinfo->rsrc_reg.start,
 551                                 pinfo->rsrc_reg.start -
 552                                 pinfo->rsrc_reg.end + 1,
 553                                 "platinumfb registers")) {
 554                 framebuffer_release(info);
 555                 return -ENXIO;
 556         }
 557         if (!request_mem_region(pinfo->rsrc_fb.start,
 558                                 pinfo->rsrc_fb.start
 559                                 - pinfo->rsrc_fb.end + 1,
 560                                 "platinumfb framebuffer")) {
 561                 release_mem_region(pinfo->rsrc_reg.start,
 562                                    pinfo->rsrc_reg.end -
 563                                    pinfo->rsrc_reg.start + 1);
 564                 framebuffer_release(info);
 565                 return -ENXIO;
 566         }
 567
 568         /* frame buffer - map only 4MB */
 569         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 570         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 571                                         _PAGE_WRITETHRU);
 572         pinfo->base_frame_buffer = pinfo->frame_buffer;
 573
 574         /* registers */
 575         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 576         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 577
 578         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 579         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 580         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 581
 582         /* Grok total video ram */
 583         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 584         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 585         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 586
 587         fbuffer = pinfo->base_frame_buffer;
 588         fbuffer[0x100000] = 0x34;
 589         fbuffer[0x100008] = 0x0;
 590         invalidate_cache(&fbuffer[0x100000]);
 591         fbuffer[0x200000] = 0x56;
 592         fbuffer[0x200008] = 0x0;
 593         invalidate_cache(&fbuffer[0x200000]);
 594         fbuffer[0x300000] = 0x78;
 595         fbuffer[0x300008] = 0x0;
 596         invalidate_cache(&fbuffer[0x300000]);
 597         bank0 = 1; /* builtin 1MB vram, always there */
 598         bank1 = fbuffer[0x100000] == 0x34;
 599         bank2 = fbuffer[0x200000] == 0x56;
 600         bank3 = fbuffer[0x300000] == 0x78;
 601         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 602         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024),
 603                bank3, bank2, bank1, bank0);
 604
 605         /*
 606          * Try to determine whether we have an old or a new DACula.
 607          */
 608         out_8(&pinfo->cmap_regs->addr, 0x40);
 609         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 610         switch (pinfo->dactype) {
 611         case 0x3c:
 612                 pinfo->clktype = 1;
 613                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 614                 break;
 615         case 0x84:
 616                 pinfo->clktype = 0;
 617                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 618                 break;
 619         default:
 620                 pinfo->clktype = 0;
 621                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 622                 break;
 623         }
 624         dev_set_drvdata(&odev->dev, info);
 625
 626         rc = platinum_init_fb(info);
 627         if (rc != 0) {
 628                 dev_set_drvdata(&odev->dev, NULL);
 629                 framebuffer_release(info);
 630         }
 631
 632         return rc;
 633 }
 634
 635 static int __devexit platinumfb_remove(struct of_device* odev)
 636 {
 637         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 638         struct fb_info_platinum *pinfo = info->par;
 639
 640         unregister_framebuffer (info);
 641
 642         /* Unmap frame buffer and registers */
 643         release_mem_region(pinfo->rsrc_fb.start,
 644                            pinfo->rsrc_fb.end -
 645                            pinfo->rsrc_fb.start + 1);
 646         release_mem_region(pinfo->rsrc_reg.start,
 647                            pinfo->rsrc_reg.end -
 648                            pinfo->rsrc_reg.start + 1);
 649         iounmap(pinfo->frame_buffer);
 650         iounmap(pinfo->platinum_regs);
 651         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 652         iounmap(pinfo->cmap_regs);
 653
 654         framebuffer_release(info);
 655
 656         return 0;
 657 }
 658
 659 static struct of_device_id platinumfb_match[] =
 660 {
 661         {
 662         .name           = "platinum",
 663         },
 664         {},
 665 };
 666
 667 static struct of_platform_driver platinum_driver =
 668 {
 669         .name           = "platinumfb",
 670         .match_table    = platinumfb_match,
 671         .probe          = platinumfb_probe,
 672         .remove         = platinumfb_remove,
 673 };
 674
 675 static int __init platinumfb_init(void)
 676 {
 677 #ifndef MODULE
 678         char *option = NULL;
 679
 680         if (fb_get_options("platinumfb", &option))
 681                 return -ENODEV;
 682         platinumfb_setup(option);
 683 #endif
 684         of_register_driver(&platinum_driver);
 685
 686         return 0;
 687 }
 688
 689 static void __exit platinumfb_exit(void)
 690 {
 691         of_unregister_driver(&platinum_driver);
 692 }
 693
 694 MODULE_LICENSE("GPL");
 695 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 696 module_init(platinumfb_init);
 697
 698 #ifdef MODULE
 699 module_exit(platinumfb_exit);
 700 #endif