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         int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
 227
 228         if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
 229                 baseval += 0x10;
 230         else
 231                 baseval += 0x20;
 232
 233         return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
 234 }
 235
 236 #define STORE_D2(a, d) { \
 237         out_8(&cmap_regs->addr, (a+32)); \
 238         out_8(&cmap_regs->d2, (d)); \
 239 }
 240
 241 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 242 {
 243         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 244         struct platinum_regvals *init;
 245
 246         init = platinum_reg_init[pinfo->vmode-1];
 247
 248         STORE_D2(6, 0xc6);
 249         out_8(&cmap_regs->addr,3+32);
 250
 251         if (in_8(&cmap_regs->d2) == 2) {
 252                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 253                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 254                 STORE_D2(3, 3);
 255         } else {
 256                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 257                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 258                 STORE_D2(3, 2);
 259         }
 260
 261         __delay(5000);
 262         STORE_D2(9, 0xa6);
 263 }
 264
 265
 266 /* Now how about actually saying, Make it so! */
 267 /* Some things in here probably don't need to be done each time. */
 268 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 269 {
 270         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 271         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 272         struct platinum_regvals         *init;
 273         int                             i;
 274         int                             vmode, cmode;
 275
 276         vmode = pinfo->vmode;
 277         cmode = pinfo->cmode;
 278
 279         init = platinum_reg_init[vmode - 1];
 280
 281         /* Initialize display timing registers */
 282         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 283
 284         for (i = 0; i < 26; ++i)
 285                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 286
 287         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 288                                                 init->offset[cmode] + 4 - cmode :
 289                                                 init->offset[cmode]));
 290         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 291         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 292         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 293                                              init->mode[cmode+1] :
 294                                              init->mode[cmode]));
 295         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 296         out_be32(&platinum_regs->reg[21].r, 0x100);
 297         out_be32(&platinum_regs->reg[22].r, 1);
 298         out_be32(&platinum_regs->reg[23].r, 1);
 299         out_be32(&platinum_regs->reg[26].r, 0xc00);
 300         out_be32(&platinum_regs->reg[27].r, 0x235);
 301         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 302
 303         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 304                      init->dacula_ctrl[cmode] & 0xf :
 305                      init->dacula_ctrl[cmode]));
 306         STORE_D2(1, 4);
 307         STORE_D2(2, 0);
 308
 309         set_platinum_clock(pinfo);
 310
 311         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 312 }
 313
 314 /*
 315  * Set misc info vars for this driver
 316  */
 317 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
 318 {
 319         /* Fill fb_info */
 320         info->fbops = &platinumfb_ops;
 321         info->pseudo_palette = pinfo->pseudo_palette;
 322         info->flags = FBINFO_DEFAULT;
 323         info->screen_base = pinfo->frame_buffer + 0x20;
 324
 325         fb_alloc_cmap(&info->cmap, 256, 0);
 326
 327         /* Fill fix common fields */
 328         strcpy(info->fix.id, "platinum");
 329         info->fix.mmio_start = pinfo->platinum_regs_phys;
 330         info->fix.mmio_len = 0x1000;
 331         info->fix.type = FB_TYPE_PACKED_PIXELS;
 332         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 333         info->fix.smem_len = pinfo->total_vram - 0x20;
 334         info->fix.ywrapstep = 0;
 335         info->fix.xpanstep = 0;
 336         info->fix.ypanstep = 0;
 337         info->fix.type_aux = 0;
 338         info->fix.accel = FB_ACCEL_NONE;
 339 }
 340
 341
 342 static int __devinit platinum_init_fb(struct fb_info *info)
 343 {
 344         struct fb_info_platinum *pinfo = info->par;
 345         struct fb_var_screeninfo var;
 346         int sense, rc;
 347
 348         sense = read_platinum_sense(pinfo);
 349         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 350         if (default_vmode == VMODE_NVRAM) {
 351 #ifdef CONFIG_NVRAM
 352                 default_vmode = nvram_read_byte(NV_VMODE);
 353                 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 354                     !platinum_reg_init[default_vmode-1])
 355 #endif
 356                         default_vmode = VMODE_CHOOSE;
 357         }
 358         if (default_vmode == VMODE_CHOOSE) {
 359                 default_vmode = mac_map_monitor_sense(sense);
 360         }
 361         if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 362                 default_vmode = VMODE_640_480_60;
 363 #ifdef CONFIG_NVRAM
 364         if (default_cmode == CMODE_NVRAM)
 365                 default_cmode = nvram_read_byte(NV_CMODE);
 366 #endif
 367         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 368                 default_cmode = CMODE_8;
 369         /*
 370          * Reduce the pixel size if we don't have enough VRAM.
 371          */
 372         while(default_cmode > CMODE_8 &&
 373               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 374                 default_cmode--;
 375
 376         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 377
 378         /* Setup default var */
 379         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 380                 /* This shouldn't happen! */
 381                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 382 try_again:
 383                 default_vmode = VMODE_640_480_60;
 384                 default_cmode = CMODE_8;
 385                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 386                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 387                         return -ENXIO;
 388                 }
 389         }
 390
 391         /* Initialize info structure */
 392         platinum_init_info(info, pinfo);
 393
 394         /* Apply default var */
 395         info->var = var;
 396         var.activate = FB_ACTIVATE_NOW;
 397         rc = fb_set_var(info, &var);
 398         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 399                 goto try_again;
 400
 401         /* Register with fbdev layer */
 402         rc = register_framebuffer(info);
 403         if (rc < 0)
 404                 return rc;
 405
 406         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 407
 408         return 0;
 409 }
 410
 411 /*
 412  * Get the monitor sense value.
 413  * Note that this can be called before calibrate_delay,
 414  * so we can't use udelay.
 415  */
 416 static int read_platinum_sense(struct fb_info_platinum *info)
 417 {
 418         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 419         int sense;
 420
 421         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 422         __delay(2000);
 423         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 424
 425         /* drive each sense line low in turn and collect the other 2 */
 426         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 427         __delay(2000);
 428         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 429         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 430         __delay(2000);
 431         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 432         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 433         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 434         __delay(2000);
 435         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 436
 437         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 438
 439         return sense;
 440 }
 441
 442 /*
 443  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 444  * It also updates the var structure to the actual mode data obtained
 445  */
 446 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 447                                struct fb_info_platinum *pinfo,
 448                                int check_only)
 449 {
 450         int vmode, cmode;
 451
 452         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 453                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 454                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 455                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 456                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 457                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 458                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 459                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 460                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 461                 return -EINVAL;
 462         }
 463
 464         if (!platinum_reg_init[vmode-1]) {
 465                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 466                 return -EINVAL;
 467         }
 468
 469         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 470                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 471                 return -EINVAL;
 472         }
 473
 474         if (mac_vmode_to_var(vmode, cmode, var))
 475                 return -EINVAL;
 476
 477         if (check_only)
 478                 return 0;
 479
 480         pinfo->vmode = vmode;
 481         pinfo->cmode = cmode;
 482         pinfo->xres = vmode_attrs[vmode-1].hres;
 483         pinfo->yres = vmode_attrs[vmode-1].vres;
 484         pinfo->xoffset = 0;
 485         pinfo->yoffset = 0;
 486         pinfo->vxres = pinfo->xres;
 487         pinfo->vyres = pinfo->yres;
 488
 489         return 0;
 490 }
 491
 492
 493 /*
 494  * Parse user speficied options (`video=platinumfb:')
 495  */
 496 static int __init platinumfb_setup(char *options)
 497 {
 498         char *this_opt;
 499
 500         if (!options || !*options)
 501                 return 0;
 502
 503         while ((this_opt = strsep(&options, ",")) != NULL) {
 504                 if (!strncmp(this_opt, "vmode:", 6)) {
 505                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 506                         if (vmode > 0 && vmode <= VMODE_MAX)
 507                                 default_vmode = vmode;
 508                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 509                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 510                         switch (depth) {
 511                          case 0:
 512                          case 8:
 513                             default_cmode = CMODE_8;
 514                             break;
 515                          case 15:
 516                          case 16:
 517                             default_cmode = CMODE_16;
 518                             break;
 519                          case 24:
 520                          case 32:
 521                             default_cmode = CMODE_32;
 522                             break;
 523                         }
 524                 }
 525         }
 526         return 0;
 527 }
 528
 529 #ifdef __powerpc__
 530 #define invalidate_cache(addr) \
 531         asm volatile("eieio; dcbf 0,%1" \
 532         : "=m" (*(addr)) : "r" (addr) : "memory");
 533 #else
 534 #define invalidate_cache(addr)
 535 #endif
 536
 537 static int __devinit platinumfb_probe(struct of_device* odev,
 538                                       const struct of_device_id *match)
 539 {
 540         struct device_node      *dp = odev->node;
 541         struct fb_info          *info;
 542         struct fb_info_platinum *pinfo;
 543         volatile __u8           *fbuffer;
 544         int                     bank0, bank1, bank2, bank3, rc;
 545
 546         dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 547
 548         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 549         if (info == NULL) {
 550                 dev_err(&odev->dev, "Failed to allocate fbdev !\n");
 551                 return -ENOMEM;
 552         }
 553         pinfo = info->par;
 554
 555         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 556             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 557                 dev_err(&odev->dev, "Can't get resources\n");
 558                 framebuffer_release(info);
 559                 return -ENXIO;
 560         }
 561         dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
 562                 (unsigned long long)pinfo->rsrc_reg.start,
 563                 (unsigned long long)pinfo->rsrc_reg.end);
 564         dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
 565                 (unsigned long long)pinfo->rsrc_fb.start,
 566                 (unsigned long long)pinfo->rsrc_fb.end);
 567
 568         /* Do not try to request register space, they overlap with the
 569          * northbridge and that can fail. Only request framebuffer
 570          */
 571         if (!request_mem_region(pinfo->rsrc_fb.start,
 572                                 pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
 573                                 "platinumfb framebuffer")) {
 574                 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
 575                 framebuffer_release(info);
 576                 return -ENXIO;
 577         }
 578
 579         /* frame buffer - map only 4MB */
 580         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 581         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 582                                         _PAGE_WRITETHRU);
 583         pinfo->base_frame_buffer = pinfo->frame_buffer;
 584
 585         /* registers */
 586         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 587         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 588
 589         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 590         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 591         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 592
 593         /* Grok total video ram */
 594         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 595         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 596         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 597
 598         fbuffer = pinfo->base_frame_buffer;
 599         fbuffer[0x100000] = 0x34;
 600         fbuffer[0x100008] = 0x0;
 601         invalidate_cache(&fbuffer[0x100000]);
 602         fbuffer[0x200000] = 0x56;
 603         fbuffer[0x200008] = 0x0;
 604         invalidate_cache(&fbuffer[0x200000]);
 605         fbuffer[0x300000] = 0x78;
 606         fbuffer[0x300008] = 0x0;
 607         invalidate_cache(&fbuffer[0x300000]);
 608         bank0 = 1; /* builtin 1MB vram, always there */
 609         bank1 = fbuffer[0x100000] == 0x34;
 610         bank2 = fbuffer[0x200000] == 0x56;
 611         bank3 = fbuffer[0x300000] == 0x78;
 612         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 613         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
 614                (unsigned int) (pinfo->total_vram / 1024 / 1024),
 615                bank3, bank2, bank1, bank0);
 616
 617         /*
 618          * Try to determine whether we have an old or a new DACula.
 619          */
 620         out_8(&pinfo->cmap_regs->addr, 0x40);
 621         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 622         switch (pinfo->dactype) {
 623         case 0x3c:
 624                 pinfo->clktype = 1;
 625                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 626                 break;
 627         case 0x84:
 628                 pinfo->clktype = 0;
 629                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 630                 break;
 631         default:
 632                 pinfo->clktype = 0;
 633                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 634                 break;
 635         }
 636         dev_set_drvdata(&odev->dev, info);
 637
 638         rc = platinum_init_fb(info);
 639         if (rc != 0) {
 640                 iounmap(pinfo->frame_buffer);
 641                 iounmap(pinfo->platinum_regs);
 642                 iounmap(pinfo->cmap_regs);
 643                 dev_set_drvdata(&odev->dev, NULL);
 644                 framebuffer_release(info);
 645         }
 646
 647         return rc;
 648 }
 649
 650 static int __devexit platinumfb_remove(struct of_device* odev)
 651 {
 652         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 653         struct fb_info_platinum *pinfo = info->par;
 654
 655         unregister_framebuffer (info);
 656
 657         /* Unmap frame buffer and registers */
 658         iounmap(pinfo->frame_buffer);
 659         iounmap(pinfo->platinum_regs);
 660         iounmap(pinfo->cmap_regs);
 661
 662         release_mem_region(pinfo->rsrc_fb.start,
 663                            pinfo->rsrc_fb.end -
 664                            pinfo->rsrc_fb.start + 1);
 665
 666         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 667
 668         framebuffer_release(info);
 669
 670         return 0;
 671 }
 672
 673 static struct of_device_id platinumfb_match[] =
 674 {
 675         {
 676         .name           = "platinum",
 677         },
 678         {},
 679 };
 680
 681 static struct of_platform_driver platinum_driver =
 682 {
 683         .name           = "platinumfb",
 684         .match_table    = platinumfb_match,
 685         .probe          = platinumfb_probe,
 686         .remove         = platinumfb_remove,
 687 };
 688
 689 static int __init platinumfb_init(void)
 690 {
 691 #ifndef MODULE
 692         char *option = NULL;
 693
 694         if (fb_get_options("platinumfb", &option))
 695                 return -ENODEV;
 696         platinumfb_setup(option);
 697 #endif
 698         of_register_platform_driver(&platinum_driver);
 699
 700         return 0;
 701 }
 702
 703 static void __exit platinumfb_exit(void)
 704 {
 705         of_unregister_platform_driver(&platinum_driver);
 706 }
 707
 708 MODULE_LICENSE("GPL");
 709 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 710 module_init(platinumfb_init);
 711
 712 #ifdef MODULE
 713 module_exit(platinumfb_exit);
 714 #endif