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platinumfb.c
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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 specified 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  resource_size(&pinfo->rsrc_fb),
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  resource_size(&pinfo->rsrc_fb));
662 
663  release_mem_region(pinfo->cmap_regs_phys, 0x1000);
664 
665  framebuffer_release(info);
666 
667  return 0;
668 }
669 
670 static struct of_device_id platinumfb_match[] =
671 {
672  {
673  .name = "platinum",
674  },
675  {},
676 };
677 
678 static struct platform_driver platinum_driver =
679 {
680  .driver = {
681  .name = "platinumfb",
682  .owner = THIS_MODULE,
683  .of_match_table = platinumfb_match,
684  },
685  .probe = platinumfb_probe,
686  .remove = __devexit_p(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  platform_driver_register(&platinum_driver);
699 
700  return 0;
701 }
702 
703 static void __exit platinumfb_exit(void)
704 {
705  platform_driver_unregister(&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
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