tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
43static int default_vmode = VMODE_NVRAM;
44static int default_cmode = CMODE_NVRAM;
45
46struct 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
80static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
81 u_int transp, struct fb_info *info);
82static int platinumfb_blank(int blank_mode, struct fb_info *info);
83static int platinumfb_set_par (struct fb_info *info);
84static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
85
86/*
87 * internal functions
88 */
89
90static inline int platinum_vram_reqd(int video_mode, int color_mode);
91static int read_platinum_sense(struct fb_info_platinum *pinfo);
92static void set_platinum_clock(struct fb_info_platinum *pinfo);
93static void platinum_set_hardware(struct fb_info_platinum *pinfo);
94static 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
102static 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 */
116static 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 */
124static 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
155static 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
185static 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
224static 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
241static 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. */
268static 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 */
317static 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
342static 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);
382try_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 */
416static 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 */
446static 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 */
496static 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
537static 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
650static 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
673static struct of_device_id platinumfb_match[] =
674{
675 {
676 .name = "platinum",
677 },
678 {},
679};
680
681static 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
689static 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
703static void __exit platinumfb_exit(void)
704{
705 of_unregister_platform_driver(&platinum_driver);
706}
707
708MODULE_LICENSE("GPL");
709MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
710module_init(platinumfb_init);
711
712#ifdef MODULE
713module_exit(platinumfb_exit);
714#endif