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/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/io.h>
  36 #include <asm/prom.h>
  37 #include <asm/pgtable.h>
  38
  39 #include "macmodes.h"
  40 #include "platinumfb.h"
  41
  42 static int default_vmode = VMODE_NVRAM;
  43 static int default_cmode = CMODE_NVRAM;
  44
  45 struct fb_info_platinum {
  46         struct fb_info                  *info;
  47
  48         int                             vmode, cmode;
  49         int                             xres, yres;
  50         int                             vxres, vyres;
  51         int                             xoffset, yoffset;
  52
  53         struct {
  54                 __u8 red, green, blue;
  55         }                               palette[256];
  56         u32                             pseudo_palette[16];
  57
  58         volatile struct cmap_regs       __iomem *cmap_regs;
  59         unsigned long                   cmap_regs_phys;
  60
  61         volatile struct platinum_regs   __iomem *platinum_regs;
  62         unsigned long                   platinum_regs_phys;
  63
  64         __u8                            __iomem *frame_buffer;
  65         volatile __u8                   __iomem *base_frame_buffer;
  66         unsigned long                   frame_buffer_phys;
  67
  68         unsigned long                   total_vram;
  69         int                             clktype;
  70         int                             dactype;
  71
  72         struct resource                 rsrc_fb, rsrc_reg;
  73 };
  74
  75 /*
  76  * Frame buffer device API
  77  */
  78
  79 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  80         u_int transp, struct fb_info *info);
  81 static int platinumfb_blank(int blank_mode, struct fb_info *info);
  82 static int platinumfb_set_par (struct fb_info *info);
  83 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  84
  85 /*
  86  * internal functions
  87  */
  88
  89 static inline int platinum_vram_reqd(int video_mode, int color_mode);
  90 static int read_platinum_sense(struct fb_info_platinum *pinfo);
  91 static void set_platinum_clock(struct fb_info_platinum *pinfo);
  92 static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  93 static int platinum_var_to_par(struct fb_var_screeninfo *var,
  94                                struct fb_info_platinum *pinfo,
  95                                int check_only);
  96
  97 /*
  98  * Interface used by the world
  99  */
 100
 101 static struct fb_ops platinumfb_ops = {
 102         .owner =        THIS_MODULE,
 103         .fb_check_var   = platinumfb_check_var,
 104         .fb_set_par     = platinumfb_set_par,
 105         .fb_setcolreg   = platinumfb_setcolreg,
 106         .fb_blank       = platinumfb_blank,
 107         .fb_fillrect    = cfb_fillrect,
 108         .fb_copyarea    = cfb_copyarea,
 109         .fb_imageblit   = cfb_imageblit,
 110 };
 111
 112 /*
 113  * Checks a var structure
 114  */
 115 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 116 {
 117         return platinum_var_to_par(var, info->par, 1);
 118 }
 119
 120 /*
 121  * Applies current var to display
 122  */
 123 static int platinumfb_set_par (struct fb_info *info)
 124 {
 125         struct fb_info_platinum *pinfo = info->par;
 126         struct platinum_regvals *init;
 127         int err, offset = 0x20;
 128
 129         if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 130                 printk (KERN_ERR "platinumfb_set_par: error calling"
 131                                  " platinum_var_to_par: %d.\n", err);
 132                 return err;
 133         }
 134
 135         platinum_set_hardware(pinfo);
 136
 137         init = platinum_reg_init[pinfo->vmode-1];
 138
 139         if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 140                 offset = 0x10;
 141
 142         info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 143         mutex_lock(&info->mm_lock);
 144         info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 145         mutex_unlock(&info->mm_lock);
 146         info->fix.visual = (pinfo->cmode == CMODE_8) ?
 147                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 148         info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 149                 + offset;
 150         printk("line_length: %x\n", info->fix.line_length);
 151         return 0;
 152 }
 153
 154 static int platinumfb_blank(int blank,  struct fb_info *fb)
 155 {
 156 /*
 157  *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 158  *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 159  *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 160  *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 161  *  and powerdown modes on hardware that supports disabling hsync/vsync:
 162  *    blank_mode == 2: suspend vsync
 163  *    blank_mode == 3: suspend hsync
 164  *    blank_mode == 4: powerdown
 165  */
 166 /* [danj] I think there's something fishy about those constants... */
 167 /*
 168         struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 169         int     ctrl;
 170
 171         ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
 172         if (blank)
 173                 --blank_mode;
 174         if (blank & VESA_VSYNC_SUSPEND)
 175                 ctrl &= ~3;
 176         if (blank & VESA_HSYNC_SUSPEND)
 177                 ctrl &= ~0x30;
 178         out_le32(&info->platinum_regs->ctrl.r, ctrl);
 179 */
 180 /* TODO: Figure out how the heck to powerdown this thing! */
 181         return 0;
 182 }
 183
 184 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 185                               u_int transp, struct fb_info *info)
 186 {
 187         struct fb_info_platinum *pinfo = info->par;
 188         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 189
 190         if (regno > 255)
 191                 return 1;
 192
 193         red >>= 8;
 194         green >>= 8;
 195         blue >>= 8;
 196
 197         pinfo->palette[regno].red = red;
 198         pinfo->palette[regno].green = green;
 199         pinfo->palette[regno].blue = blue;
 200
 201         out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 202         out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 203         out_8(&cmap_regs->lut, green);          /* a time...                    */
 204         out_8(&cmap_regs->lut, blue);
 205
 206         if (regno < 16) {
 207                 int i;
 208                 u32 *pal = info->pseudo_palette;
 209                 switch (pinfo->cmode) {
 210                 case CMODE_16:
 211                         pal[regno] = (regno << 10) | (regno << 5) | regno;
 212                         break;
 213                 case CMODE_32:
 214                         i = (regno << 8) | regno;
 215                         pal[regno] = (i << 16) | i;
 216                         break;
 217                 }
 218         }
 219
 220         return 0;
 221 }
 222
 223 static inline int platinum_vram_reqd(int video_mode, int color_mode)
 224 {
 225         int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
 226
 227         if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
 228                 baseval += 0x10;
 229         else
 230                 baseval += 0x20;
 231
 232         return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
 233 }
 234
 235 #define STORE_D2(a, d) { \
 236         out_8(&cmap_regs->addr, (a+32)); \
 237         out_8(&cmap_regs->d2, (d)); \
 238 }
 239
 240 static void set_platinum_clock(struct fb_info_platinum *pinfo)
 241 {
 242         volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 243         struct platinum_regvals *init;
 244
 245         init = platinum_reg_init[pinfo->vmode-1];
 246
 247         STORE_D2(6, 0xc6);
 248         out_8(&cmap_regs->addr,3+32);
 249
 250         if (in_8(&cmap_regs->d2) == 2) {
 251                 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 252                 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 253                 STORE_D2(3, 3);
 254         } else {
 255                 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 256                 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 257                 STORE_D2(3, 2);
 258         }
 259
 260         __delay(5000);
 261         STORE_D2(9, 0xa6);
 262 }
 263
 264
 265 /* Now how about actually saying, Make it so! */
 266 /* Some things in here probably don't need to be done each time. */
 267 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 268 {
 269         volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 270         volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 271         struct platinum_regvals         *init;
 272         int                             i;
 273         int                             vmode, cmode;
 274
 275         vmode = pinfo->vmode;
 276         cmode = pinfo->cmode;
 277
 278         init = platinum_reg_init[vmode - 1];
 279
 280         /* Initialize display timing registers */
 281         out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 282
 283         for (i = 0; i < 26; ++i)
 284                 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 285
 286         out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 287                                                 init->offset[cmode] + 4 - cmode :
 288                                                 init->offset[cmode]));
 289         out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 290         out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 291         out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 292                                              init->mode[cmode+1] :
 293                                              init->mode[cmode]));
 294         out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 295         out_be32(&platinum_regs->reg[21].r, 0x100);
 296         out_be32(&platinum_regs->reg[22].r, 1);
 297         out_be32(&platinum_regs->reg[23].r, 1);
 298         out_be32(&platinum_regs->reg[26].r, 0xc00);
 299         out_be32(&platinum_regs->reg[27].r, 0x235);
 300         /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 301
 302         STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 303                      init->dacula_ctrl[cmode] & 0xf :
 304                      init->dacula_ctrl[cmode]));
 305         STORE_D2(1, 4);
 306         STORE_D2(2, 0);
 307
 308         set_platinum_clock(pinfo);
 309
 310         out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 311 }
 312
 313 /*
 314  * Set misc info vars for this driver
 315  */
 316 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
 317 {
 318         /* Fill fb_info */
 319         info->fbops = &platinumfb_ops;
 320         info->pseudo_palette = pinfo->pseudo_palette;
 321         info->flags = FBINFO_DEFAULT;
 322         info->screen_base = pinfo->frame_buffer + 0x20;
 323
 324         fb_alloc_cmap(&info->cmap, 256, 0);
 325
 326         /* Fill fix common fields */
 327         strcpy(info->fix.id, "platinum");
 328         info->fix.mmio_start = pinfo->platinum_regs_phys;
 329         info->fix.mmio_len = 0x1000;
 330         info->fix.type = FB_TYPE_PACKED_PIXELS;
 331         info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 332         info->fix.smem_len = pinfo->total_vram - 0x20;
 333         info->fix.ywrapstep = 0;
 334         info->fix.xpanstep = 0;
 335         info->fix.ypanstep = 0;
 336         info->fix.type_aux = 0;
 337         info->fix.accel = FB_ACCEL_NONE;
 338 }
 339
 340
 341 static int __devinit platinum_init_fb(struct fb_info *info)
 342 {
 343         struct fb_info_platinum *pinfo = info->par;
 344         struct fb_var_screeninfo var;
 345         int sense, rc;
 346
 347         sense = read_platinum_sense(pinfo);
 348         printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 349         if (default_vmode == VMODE_NVRAM) {
 350 #ifdef CONFIG_NVRAM
 351                 default_vmode = nvram_read_byte(NV_VMODE);
 352                 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 353                     !platinum_reg_init[default_vmode-1])
 354 #endif
 355                         default_vmode = VMODE_CHOOSE;
 356         }
 357         if (default_vmode == VMODE_CHOOSE) {
 358                 default_vmode = mac_map_monitor_sense(sense);
 359         }
 360         if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 361                 default_vmode = VMODE_640_480_60;
 362 #ifdef CONFIG_NVRAM
 363         if (default_cmode == CMODE_NVRAM)
 364                 default_cmode = nvram_read_byte(NV_CMODE);
 365 #endif
 366         if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 367                 default_cmode = CMODE_8;
 368         /*
 369          * Reduce the pixel size if we don't have enough VRAM.
 370          */
 371         while(default_cmode > CMODE_8 &&
 372               platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 373                 default_cmode--;
 374
 375         printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 376
 377         /* Setup default var */
 378         if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 379                 /* This shouldn't happen! */
 380                 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 381 try_again:
 382                 default_vmode = VMODE_640_480_60;
 383                 default_cmode = CMODE_8;
 384                 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 385                         printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 386                         return -ENXIO;
 387                 }
 388         }
 389
 390         /* Initialize info structure */
 391         platinum_init_info(info, pinfo);
 392
 393         /* Apply default var */
 394         info->var = var;
 395         var.activate = FB_ACTIVATE_NOW;
 396         rc = fb_set_var(info, &var);
 397         if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 398                 goto try_again;
 399
 400         /* Register with fbdev layer */
 401         rc = register_framebuffer(info);
 402         if (rc < 0)
 403                 return rc;
 404
 405         printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 406
 407         return 0;
 408 }
 409
 410 /*
 411  * Get the monitor sense value.
 412  * Note that this can be called before calibrate_delay,
 413  * so we can't use udelay.
 414  */
 415 static int read_platinum_sense(struct fb_info_platinum *info)
 416 {
 417         volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 418         int sense;
 419
 420         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 421         __delay(2000);
 422         sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 423
 424         /* drive each sense line low in turn and collect the other 2 */
 425         out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 426         __delay(2000);
 427         sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 428         out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 429         __delay(2000);
 430         sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 431         sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 432         out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 433         __delay(2000);
 434         sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 435
 436         out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 437
 438         return sense;
 439 }
 440
 441 /*
 442  * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 443  * It also updates the var structure to the actual mode data obtained
 444  */
 445 static int platinum_var_to_par(struct fb_var_screeninfo *var,
 446                                struct fb_info_platinum *pinfo,
 447                                int check_only)
 448 {
 449         int vmode, cmode;
 450
 451         if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 452                 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 453                 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 454                 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 455                 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 456                 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 457                 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 458                 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 459                 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 460                 return -EINVAL;
 461         }
 462
 463         if (!platinum_reg_init[vmode-1]) {
 464                 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 465                 return -EINVAL;
 466         }
 467
 468         if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 469                 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 470                 return -EINVAL;
 471         }
 472
 473         if (mac_vmode_to_var(vmode, cmode, var))
 474                 return -EINVAL;
 475
 476         if (check_only)
 477                 return 0;
 478
 479         pinfo->vmode = vmode;
 480         pinfo->cmode = cmode;
 481         pinfo->xres = vmode_attrs[vmode-1].hres;
 482         pinfo->yres = vmode_attrs[vmode-1].vres;
 483         pinfo->xoffset = 0;
 484         pinfo->yoffset = 0;
 485         pinfo->vxres = pinfo->xres;
 486         pinfo->vyres = pinfo->yres;
 487
 488         return 0;
 489 }
 490
 491
 492 /*
 493  * Parse user speficied options (`video=platinumfb:')
 494  */
 495 static int __init platinumfb_setup(char *options)
 496 {
 497         char *this_opt;
 498
 499         if (!options || !*options)
 500                 return 0;
 501
 502         while ((this_opt = strsep(&options, ",")) != NULL) {
 503                 if (!strncmp(this_opt, "vmode:", 6)) {
 504                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
 505                         if (vmode > 0 && vmode <= VMODE_MAX)
 506                                 default_vmode = vmode;
 507                 } else if (!strncmp(this_opt, "cmode:", 6)) {
 508                         int depth = simple_strtoul(this_opt+6, NULL, 0);
 509                         switch (depth) {
 510                          case 0:
 511                          case 8:
 512                             default_cmode = CMODE_8;
 513                             break;
 514                          case 15:
 515                          case 16:
 516                             default_cmode = CMODE_16;
 517                             break;
 518                          case 24:
 519                          case 32:
 520                             default_cmode = CMODE_32;
 521                             break;
 522                         }
 523                 }
 524         }
 525         return 0;
 526 }
 527
 528 #ifdef __powerpc__
 529 #define invalidate_cache(addr) \
 530         asm volatile("eieio; dcbf 0,%1" \
 531         : "=m" (*(addr)) : "r" (addr) : "memory");
 532 #else
 533 #define invalidate_cache(addr)
 534 #endif
 535
 536 static int __devinit platinumfb_probe(struct platform_device* odev)
 537 {
 538         struct device_node      *dp = odev->dev.of_node;
 539         struct fb_info          *info;
 540         struct fb_info_platinum *pinfo;
 541         volatile __u8           *fbuffer;
 542         int                     bank0, bank1, bank2, bank3, rc;
 543
 544         dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 545
 546         info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 547         if (info == NULL) {
 548                 dev_err(&odev->dev, "Failed to allocate fbdev !\n");
 549                 return -ENOMEM;
 550         }
 551         pinfo = info->par;
 552
 553         if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 554             of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 555                 dev_err(&odev->dev, "Can't get resources\n");
 556                 framebuffer_release(info);
 557                 return -ENXIO;
 558         }
 559         dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
 560                 (unsigned long long)pinfo->rsrc_reg.start,
 561                 (unsigned long long)pinfo->rsrc_reg.end);
 562         dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
 563                 (unsigned long long)pinfo->rsrc_fb.start,
 564                 (unsigned long long)pinfo->rsrc_fb.end);
 565
 566         /* Do not try to request register space, they overlap with the
 567          * northbridge and that can fail. Only request framebuffer
 568          */
 569         if (!request_mem_region(pinfo->rsrc_fb.start,
 570                                 pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
 571                                 "platinumfb framebuffer")) {
 572                 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
 573                 framebuffer_release(info);
 574                 return -ENXIO;
 575         }
 576
 577         /* frame buffer - map only 4MB */
 578         pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 579         pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 580                                         _PAGE_WRITETHRU);
 581         pinfo->base_frame_buffer = pinfo->frame_buffer;
 582
 583         /* registers */
 584         pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 585         pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 586
 587         pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 588         request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 589         pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 590
 591         /* Grok total video ram */
 592         out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 593         out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 594         out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 595
 596         fbuffer = pinfo->base_frame_buffer;
 597         fbuffer[0x100000] = 0x34;
 598         fbuffer[0x100008] = 0x0;
 599         invalidate_cache(&fbuffer[0x100000]);
 600         fbuffer[0x200000] = 0x56;
 601         fbuffer[0x200008] = 0x0;
 602         invalidate_cache(&fbuffer[0x200000]);
 603         fbuffer[0x300000] = 0x78;
 604         fbuffer[0x300008] = 0x0;
 605         invalidate_cache(&fbuffer[0x300000]);
 606         bank0 = 1; /* builtin 1MB vram, always there */
 607         bank1 = fbuffer[0x100000] == 0x34;
 608         bank2 = fbuffer[0x200000] == 0x56;
 609         bank3 = fbuffer[0x300000] == 0x78;
 610         pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 611         printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
 612                (unsigned int) (pinfo->total_vram / 1024 / 1024),
 613                bank3, bank2, bank1, bank0);
 614
 615         /*
 616          * Try to determine whether we have an old or a new DACula.
 617          */
 618         out_8(&pinfo->cmap_regs->addr, 0x40);
 619         pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 620         switch (pinfo->dactype) {
 621         case 0x3c:
 622                 pinfo->clktype = 1;
 623                 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 624                 break;
 625         case 0x84:
 626                 pinfo->clktype = 0;
 627                 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 628                 break;
 629         default:
 630                 pinfo->clktype = 0;
 631                 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 632                 break;
 633         }
 634         dev_set_drvdata(&odev->dev, info);
 635
 636         rc = platinum_init_fb(info);
 637         if (rc != 0) {
 638                 iounmap(pinfo->frame_buffer);
 639                 iounmap(pinfo->platinum_regs);
 640                 iounmap(pinfo->cmap_regs);
 641                 dev_set_drvdata(&odev->dev, NULL);
 642                 framebuffer_release(info);
 643         }
 644
 645         return rc;
 646 }
 647
 648 static int __devexit platinumfb_remove(struct platform_device* odev)
 649 {
 650         struct fb_info          *info = dev_get_drvdata(&odev->dev);
 651         struct fb_info_platinum *pinfo = info->par;
 652
 653         unregister_framebuffer (info);
 654
 655         /* Unmap frame buffer and registers */
 656         iounmap(pinfo->frame_buffer);
 657         iounmap(pinfo->platinum_regs);
 658         iounmap(pinfo->cmap_regs);
 659
 660         release_mem_region(pinfo->rsrc_fb.start,
 661                            pinfo->rsrc_fb.end -
 662                            pinfo->rsrc_fb.start + 1);
 663
 664         release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 665
 666         framebuffer_release(info);
 667
 668         return 0;
 669 }
 670
 671 static struct of_device_id platinumfb_match[] =
 672 {
 673         {
 674         .name           = "platinum",
 675         },
 676         {},
 677 };
 678
 679 static struct platform_driver platinum_driver =
 680 {
 681         .driver = {
 682                 .name = "platinumfb",
 683                 .owner = THIS_MODULE,
 684                 .of_match_table = platinumfb_match,
 685         },
 686         .probe          = platinumfb_probe,
 687         .remove         = platinumfb_remove,
 688 };
 689
 690 static int __init platinumfb_init(void)
 691 {
 692 #ifndef MODULE
 693         char *option = NULL;
 694
 695         if (fb_get_options("platinumfb", &option))
 696                 return -ENODEV;
 697         platinumfb_setup(option);
 698 #endif
 699         platform_driver_register(&platinum_driver);
 700
 701         return 0;
 702 }
 703
 704 static void __exit platinumfb_exit(void)
 705 {
 706         platform_driver_unregister(&platinum_driver);
 707 }
 708
 709 MODULE_LICENSE("GPL");
 710 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 711 module_init(platinumfb_init);
 712
 713 #ifdef MODULE
 714 module_exit(platinumfb_exit);
 715 #endif