linux/drivers/video/fbdev/platinumfb.c
<<
>>
Prefs
   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
  40static int default_vmode = VMODE_NVRAM;
  41static int default_cmode = CMODE_NVRAM;
  42
  43struct 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
  77static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  78        u_int transp, struct fb_info *info);
  79static int platinumfb_blank(int blank_mode, struct fb_info *info);
  80static int platinumfb_set_par (struct fb_info *info);
  81static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  82
  83/*
  84 * internal functions
  85 */
  86
  87static inline int platinum_vram_reqd(int video_mode, int color_mode);
  88static int read_platinum_sense(struct fb_info_platinum *pinfo);
  89static void set_platinum_clock(struct fb_info_platinum *pinfo);
  90static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  91static 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
  99static 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 */
 113static 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 */
 121static 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
 152static 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
 182static 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
 221static 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
 238static 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. */
 265static 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 */
 314static 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
 340static 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);
 375try_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 */
 409static 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 */
 439static 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 */
 489static 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
 530static 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
 639static 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
 661static struct of_device_id platinumfb_match[] = 
 662{
 663        {
 664        .name           = "platinum",
 665        },
 666        {},
 667};
 668
 669static 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
 679static 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
 693static void __exit platinumfb_exit(void)
 694{
 695        platform_driver_unregister(&platinum_driver);
 696}
 697
 698MODULE_LICENSE("GPL");
 699MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 700module_init(platinumfb_init);
 701
 702#ifdef MODULE
 703module_exit(platinumfb_exit);
 704#endif
 705