drivers/video/fbdev/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/vmalloc.h>
  28 #include <linux/delay.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/fb.h>
  31 #include <linux/init.h>
  32 #include <linux/nvram.h>
  33 #include <linux/of_device.h>
  34 #include <linux/of_platform.h>
  35 #include <asm/prom.h>
  36
  37 #include "macmodes.h"
  38 #include "platinumfb.h"
  39
  40 static int default_vmode = VMODE_NVRAM;
  41 static int default_cmode = CMODE_NVRAM;
  42
  43 struct fb_info_platinum {
  44         struct fb_info                  *info;
  45
  46         int                             vmode, cmode;
  47         int                             xres, yres;
  48         int                             vxres, vyres;
  49         int                             xoffset, yoffset;
  50
  51         struct {
  52                 __u8 red, green, blue;
  53         }                               palette[256];
  54         u32                             pseudo_palette[16];
  55
  56         volatile struct cmap_regs       __iomem *cmap_regs;
  57         unsigned long                   cmap_regs_phys;
  58
  59         volatile struct platinum_regs   __iomem *platinum_regs;
  60         unsigned long                   platinum_regs_phys;
  61
  62         __u8                            __iomem *frame_buffer;
  63         volatile __u8                   __iomem *base_frame_buffer;
  64         unsigned long                   frame_buffer_phys;
  65
  66         unsigned long                   total_vram;
  67         int                             clktype;
  68         int                             dactype;
  69
  70         struct resource                 rsrc_fb, rsrc_reg;
  71 };
  72
  73 /*
  74  * Frame buffer device API
  75  */
  76
  77 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  78         u_int transp, struct fb_info *info);
  79 static int platinumfb_blank(int blank_mode, struct fb_info *info);
  80 static int platinumfb_set_par (struct fb_info *info);
  81 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  82
  83 /*
  84  * internal functions
  85  */
  86
  87 static inline int platinum_vram_reqd(int video_mode, int color_mode);
  88 static int read_platinum_sense(struct fb_info_platinum *pinfo);
  89 static void set_platinum_clock(struct fb_info_platinum *pinfo);
  90 static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  91 static int platinum_var_to_par(struct fb_var_screeninfo *var,
  92                                struct fb_info_platinum *pinfo,
  93                                int check_only);
  94
  95 /*
  96  * Interface used by the world
  97  */
  98
  99 static const struct fb_ops platinumfb_ops = {
 100         .owner =        THIS_MODULE,
 101         .fb_check_var   = platinumfb_check_var,
 102         .fb_set_par     = platinumfb_set_par,
 103         .fb_setcolreg   = platinumfb_setcolreg,
 104         .fb_blank       = platinumfb_blank,
 105         .fb_fillrect    = cfb_fillrect,
 106         .fb_copyarea    = cfb_copyarea,
 107         .fb_imageblit   = cfb_imageblit,
 108 };
 109
 110 /*
 111  * Checks a var structure
 112  */
 113 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 114 {
 115         return platinum_var_to_par(var, info->par, 1);
 116 }
 117
 118 /*
 119  * Applies current var to display
 120  */
 121 static int platinumfb_set_par (struct fb_info *info)
 122 {
 123         struct fb_info_platinum *pinfo = info->par;
 124         struct platinum_regvals *init;
 125         int err, offset = 0x20;
 126
 127         if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 128                 printk (KERN_ERR "platinumfb_set_par: error calling"
 129                                  " platinum_var_to_par: %d.\n", err);
 130                 return err;
 131         }
 132
 133         platinum_set_hardware(pinfo);
 134
 135         init = platinum_reg_init[pinfo->vmode-1];
 136
 137         if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 138                 offset = 0x10;
 139
 140         info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 141         mutex_lock(&info->mm_lock);
 142         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 143         mutex_unlock(&info->mm_lock);
 144         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 145                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 146         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 147                 + offset;
 148         printk("line_length: %x\n", info->fix.line_length);
 149         return 0;
 150 }
 151
 152 static int platinumfb_blank(int blank,  struct fb_info *fb)
 153 {
 154 /*
 155  *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 156  *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 157  *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 158  *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 159  *  and powerdown modes on hardware that supports disabling hsync/vsync:
 160  *    blank_mode == 2: suspend vsync
 161  *    blank_mode == 3: suspend hsync
 162  *    blank_mode == 4: powerdown
 163  */
 164 /* [danj] I think there's something fishy about those constants... */
 165 /*
 166         struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 167         int     ctrl;
 168
 169         ctrl = le32_to_cpup(&info->platinum_regs->ctrl.r) | 0x33;
 170         if (blank)
 171                 --blank_mode;
 172         if (blank & VESA_VSYNC_SUSPEND)
 173                 ctrl &= ~3;
 174         if (blank & VESA_HSYNC_SUSPEND)
 175                 ctrl &= ~0x30;
 176         out_le32(&info->platinum_regs->ctrl.r, ctrl);
 177 */
 178 /* TODO: Figure out how the heck to powerdown this thing! */
 179         return 0;
 180 }
 181
 182 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 183                               u_int transp, struct fb_info *info)
 184 {
 185         struct fb_info_platinum *pinfo = info->par;
 186         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 187
 188         if (regno > 255)
 189                 return 1;
 190
 191         red >>= 8;
 192         green >>= 8;
 193         blue >>= 8;
 194
 195         pinfo->palette[regno].red = red;
 196         pinfo->palette[regno].green = green;
 197         pinfo->palette[regno].blue = blue;
 198
 199         out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 200         out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 201         out_8(&cmap_regs->lut, green);          /* a time...                    */
 202         out_8(&cmap_regs->lut, blue);
 203
 204         if (regno < 16) {
 205                 int i;
 206                 u32 *pal = info->pseudo_palette;
 207                 switch (pinfo->cmode) {
 208                 case CMODE_16:
 209                         pal[regno] = (regno << 10) | (regno << 5) | regno;
 210                         break;
 211                 case CMODE_32:
 212                         i = (regno << 8) | regno;
 213                         pal[regno] = (i << 16) | i;
 214                         break;
 215                 }
 216         }
 217
 218         return 0;
 219 }
 220
 221 static inline int platinum_vram_reqd(int video_mode, int color_mode)
 222 {
 223         int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
 224
 225         if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
 226                 baseval += 0x10;
 227         else
 228                 baseval += 0x20;
 229
 230         return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
 231 }
 232
 233 #define STORE_D2(a, d) { \
 234         out_8(&cmap_regs->addr, (a+32)); \
 235         out_8(&cmap_regs->d2, (d)); \
 236 }
 237
 238 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 239 {
 240         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 241         struct platinum_regvals *init;
 242
 243         init = platinum_reg_init[pinfo->vmode-1];
 244
 245         STORE_D2(6, 0xc6);
 246         out_8(&cmap_regs->addr,3+32);
 247
 248         if (in_8(&cmap_regs->d2) == 2) {
 249                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 250                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 251                 STORE_D2(3, 3);
 252         } else {
 253                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 254                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 255                 STORE_D2(3, 2);
 256         }
 257
 258         __delay(5000);
 259         STORE_D2(9, 0xa6);
 260 }
 261
 262
 263 /* Now how about actually saying, Make it so! */
 264 /* Some things in here probably don't need to be done each time. */
 265 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 266 {
 267         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 268         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 269         struct platinum_regvals         *init;
 270         int                             i;
 271         int                             vmode, cmode;
 272
 273         vmode = pinfo->vmode;
 274         cmode = pinfo->cmode;
 275
 276         init = platinum_reg_init[vmode - 1];
 277
 278         /* Initialize display timing registers */
 279         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 280
 281         for (i = 0; i < 26; ++i)
 282                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 283
 284         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 285                                                 init->offset[cmode] + 4 - cmode :
 286                                                 init->offset[cmode]));
 287         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 288         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 289         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 290                                              init->mode[cmode+1] :
 291                                              init->mode[cmode]));
 292         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 293         out_be32(&platinum_regs->reg[21].r, 0x100);
 294         out_be32(&platinum_regs->reg[22].r, 1);
 295         out_be32(&platinum_regs->reg[23].r, 1);
 296         out_be32(&platinum_regs->reg[26].r, 0xc00);
 297         out_be32(&platinum_regs->reg[27].r, 0x235);
 298         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 299
 300         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 301                      init->dacula_ctrl[cmode] & 0xf :
 302                      init->dacula_ctrl[cmode]));
 303         STORE_D2(1, 4);
 304         STORE_D2(2, 0);
 305
 306         set_platinum_clock(pinfo);
 307
 308         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 309 }
 310
 311 /*
 312  * Set misc info vars for this driver
 313  */
 314 static void platinum_init_info(struct fb_info *info,
 315                                struct fb_info_platinum *pinfo)
 316 {
 317         /* Fill fb_info */
 318         info->fbops = &platinumfb_ops;
 319         info->pseudo_palette = pinfo->pseudo_palette;
 320         info->flags = FBINFO_DEFAULT;
 321         info->screen_base = pinfo->frame_buffer + 0x20;
 322
 323         fb_alloc_cmap(&info->cmap, 256, 0);
 324
 325         /* Fill fix common fields */
 326         strcpy(info->fix.id, "platinum");
 327         info->fix.mmio_start = pinfo->platinum_regs_phys;
 328         info->fix.mmio_len = 0x1000;
 329         info->fix.type = FB_TYPE_PACKED_PIXELS;
 330         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 331         info->fix.smem_len = pinfo->total_vram - 0x20;
 332         info->fix.ywrapstep = 0;
 333         info->fix.xpanstep = 0;
 334         info->fix.ypanstep = 0;
 335         info->fix.type_aux = 0;
 336         info->fix.accel = FB_ACCEL_NONE;
 337 }
 338
 339
 340 static int platinum_init_fb(struct fb_info *info)
 341 {
 342         struct fb_info_platinum *pinfo = info->par;
 343         struct fb_var_screeninfo var;
 344         int sense, rc;
 345
 346         sense = read_platinum_sense(pinfo);
 347         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 348
 349         if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM)
 350                 default_vmode = nvram_read_byte(NV_VMODE);
 351         if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 352             !platinum_reg_init[default_vmode - 1]) {
 353                 default_vmode = mac_map_monitor_sense(sense);
 354                 if (!platinum_reg_init[default_vmode - 1])
 355                         default_vmode = VMODE_640_480_60;
 356         }
 357
 358         if (IS_REACHABLE(CONFIG_NVRAM) && default_cmode == CMODE_NVRAM)
 359                 default_cmode = nvram_read_byte(NV_CMODE);
 360         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 361                 default_cmode = CMODE_8;
 362         /*
 363          * Reduce the pixel size if we don't have enough VRAM.
 364          */
 365         while(default_cmode > CMODE_8 &&
 366               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 367                 default_cmode--;
 368
 369         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 370
 371         /* Setup default var */
 372         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 373                 /* This shouldn't happen! */
 374                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 375 try_again:
 376                 default_vmode = VMODE_640_480_60;
 377                 default_cmode = CMODE_8;
 378                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 379                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 380                         return -ENXIO;
 381                 }
 382         }
 383
 384         /* Initialize info structure */
 385         platinum_init_info(info, pinfo);
 386
 387         /* Apply default var */
 388         info->var = var;
 389         var.activate = FB_ACTIVATE_NOW;
 390         rc = fb_set_var(info, &var);
 391         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 392                 goto try_again;
 393
 394         /* Register with fbdev layer */
 395         rc = register_framebuffer(info);
 396         if (rc < 0)
 397                 return rc;
 398
 399         fb_info(info, "Apple Platinum frame buffer device\n");
 400
 401         return 0;
 402 }
 403
 404 /*
 405  * Get the monitor sense value.
 406  * Note that this can be called before calibrate_delay,
 407  * so we can't use udelay.
 408  */
 409 static int read_platinum_sense(struct fb_info_platinum *info)
 410 {
 411         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 412         int sense;
 413
 414         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 415         __delay(2000);
 416         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 417
 418         /* drive each sense line low in turn and collect the other 2 */
 419         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 420         __delay(2000);
 421         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 422         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 423         __delay(2000);
 424         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 425         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 426         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 427         __delay(2000);
 428         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 429
 430         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 431
 432         return sense;
 433 }
 434
 435 /*
 436  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 437  * It also updates the var structure to the actual mode data obtained
 438  */
 439 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 440                                struct fb_info_platinum *pinfo,
 441                                int check_only)
 442 {
 443         int vmode, cmode;
 444
 445         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 446                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 447                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 448                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 449                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 450                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 451                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 452                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 453                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 454                 return -EINVAL;
 455         }
 456
 457         if (!platinum_reg_init[vmode-1]) {
 458                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 459                 return -EINVAL;
 460         }
 461
 462         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 463                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 464                 return -EINVAL;
 465         }
 466
 467         if (mac_vmode_to_var(vmode, cmode, var))
 468                 return -EINVAL;
 469
 470         if (check_only)
 471                 return 0;
 472
 473         pinfo->vmode = vmode;
 474         pinfo->cmode = cmode;
 475         pinfo->xres = vmode_attrs[vmode-1].hres;
 476         pinfo->yres = vmode_attrs[vmode-1].vres;
 477         pinfo->xoffset = 0;
 478         pinfo->yoffset = 0;
 479         pinfo->vxres = pinfo->xres;
 480         pinfo->vyres = pinfo->yres;
 481
 482         return 0;
 483 }
 484
 485
 486 /*
 487  * Parse user specified options (`video=platinumfb:')
 488  */
 489 static int __init platinumfb_setup(char *options)
 490 {
 491         char *this_opt;
 492
 493         if (!options || !*options)
 494                 return 0;
 495
 496         while ((this_opt = strsep(&options, ",")) != NULL) {
 497                 if (!strncmp(this_opt, "vmode:", 6)) {
 498                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 499                         if (vmode > 0 && vmode <= VMODE_MAX)
 500                                 default_vmode = vmode;
 501                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 502                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 503                         switch (depth) {
 504                          case 0:
 505                          case 8:
 506                             default_cmode = CMODE_8;
 507                             break;
 508                          case 15:
 509                          case 16:
 510                             default_cmode = CMODE_16;
 511                             break;
 512                          case 24:
 513                          case 32:
 514                             default_cmode = CMODE_32;
 515                             break;
 516                         }
 517                 }
 518         }
 519         return 0;
 520 }
 521
 522 #ifdef __powerpc__
 523 #define invalidate_cache(addr) \
 524         asm volatile("eieio; dcbf 0,%1" \
 525         : "=m" (*(addr)) : "r" (addr) : "memory");
 526 #else
 527 #define invalidate_cache(addr)
 528 #endif
 529
 530 static int platinumfb_probe(struct platform_device* odev)
 531 {
 532         struct device_node      *dp = odev->dev.of_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         dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 539
 540         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 541         if (!info)
 542                 return -ENOMEM;
 543
 544         pinfo = info->par;
 545
 546         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 547             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 548                 dev_err(&odev->dev, "Can't get resources\n");
 549                 framebuffer_release(info);
 550                 return -ENXIO;
 551         }
 552         dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
 553                 (unsigned long long)pinfo->rsrc_reg.start,
 554                 (unsigned long long)pinfo->rsrc_reg.end);
 555         dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
 556                 (unsigned long long)pinfo->rsrc_fb.start,
 557                 (unsigned long long)pinfo->rsrc_fb.end);
 558
 559         /* Do not try to request register space, they overlap with the
 560          * northbridge and that can fail. Only request framebuffer
 561          */
 562         if (!request_mem_region(pinfo->rsrc_fb.start,
 563                                 resource_size(&pinfo->rsrc_fb),
 564                                 "platinumfb framebuffer")) {
 565                 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
 566                 framebuffer_release(info);
 567                 return -ENXIO;
 568         }
 569
 570         /* frame buffer - map only 4MB */
 571         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 572         pinfo->frame_buffer = ioremap_wt(pinfo->rsrc_fb.start, 0x400000);
 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",
 604                (unsigned int) (pinfo->total_vram / 1024 / 1024),
 605                bank3, bank2, bank1, bank0);
 606
 607         /*
 608          * Try to determine whether we have an old or a new DACula.
 609          */
 610         out_8(&pinfo->cmap_regs->addr, 0x40);
 611         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 612         switch (pinfo->dactype) {
 613         case 0x3c:
 614                 pinfo->clktype = 1;
 615                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 616                 break;
 617         case 0x84:
 618                 pinfo->clktype = 0;
 619                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 620                 break;
 621         default:
 622                 pinfo->clktype = 0;
 623                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 624                 break;
 625         }
 626         dev_set_drvdata(&odev->dev, info);
 627
 628         rc = platinum_init_fb(info);
 629         if (rc != 0) {
 630                 iounmap(pinfo->frame_buffer);
 631                 iounmap(pinfo->platinum_regs);
 632                 iounmap(pinfo->cmap_regs);
 633                 framebuffer_release(info);
 634         }
 635
 636         return rc;
 637 }
 638
 639 static int platinumfb_remove(struct platform_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         iounmap(pinfo->frame_buffer);
 648         iounmap(pinfo->platinum_regs);
 649         iounmap(pinfo->cmap_regs);
 650
 651         release_mem_region(pinfo->rsrc_fb.start,
 652                            resource_size(&pinfo->rsrc_fb));
 653
 654         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 655
 656         framebuffer_release(info);
 657
 658         return 0;
 659 }
 660
 661 static struct of_device_id platinumfb_match[] =
 662 {
 663         {
 664         .name           = "platinum",
 665         },
 666         {},
 667 };
 668
 669 static struct platform_driver platinum_driver =
 670 {
 671         .driver = {
 672                 .name = "platinumfb",
 673                 .of_match_table = platinumfb_match,
 674         },
 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         platform_driver_register(&platinum_driver);
 689
 690         return 0;
 691 }
 692
 693 static void __exit platinumfb_exit(void)
 694 {
 695         platform_driver_unregister(&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