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
42static int default_vmode = VMODE_NVRAM;
43static int default_cmode = CMODE_NVRAM;
44
45struct 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
79static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
80	u_int transp, struct fb_info *info);
81static int platinumfb_blank(int blank_mode, struct fb_info *info);
82static int platinumfb_set_par (struct fb_info *info);
83static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
84
85/*
86 * internal functions
87 */
88
89static inline int platinum_vram_reqd(int video_mode, int color_mode);
90static int read_platinum_sense(struct fb_info_platinum *pinfo);
91static void set_platinum_clock(struct fb_info_platinum *pinfo);
92static void platinum_set_hardware(struct fb_info_platinum *pinfo);
93static 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
101static 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 */
115static 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 */
123static 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
154static 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 = le32_to_cpup(&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
184static 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
223static 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
240static 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. */
267static 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 */
316static void platinum_init_info(struct fb_info *info,
317			       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 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	fb_info(info, "Apple Platinum frame buffer device\n");
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 specified 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 platinumfb_probe(struct platform_device* odev)
538{
539	struct device_node	*dp = odev->dev.of_node;
540	struct fb_info		*info;
541	struct fb_info_platinum	*pinfo;
542	volatile __u8		*fbuffer;
543	int			bank0, bank1, bank2, bank3, rc;
544
545	dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
546
547	info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
548	if (info == NULL) {
549		dev_err(&odev->dev, "Failed to allocate fbdev !\n");
550		return -ENOMEM;
551	}
552	pinfo = info->par;
553
554	if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
555	    of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
556		dev_err(&odev->dev, "Can't get resources\n");
557		framebuffer_release(info);
558		return -ENXIO;
559	}
560	dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
561		(unsigned long long)pinfo->rsrc_reg.start,
562		(unsigned long long)pinfo->rsrc_reg.end);
563	dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
564		(unsigned long long)pinfo->rsrc_fb.start,
565		(unsigned long long)pinfo->rsrc_fb.end);
566
567	/* Do not try to request register space, they overlap with the
568	 * northbridge and that can fail. Only request framebuffer
569	 */
570	if (!request_mem_region(pinfo->rsrc_fb.start,
571				resource_size(&pinfo->rsrc_fb),
572				"platinumfb framebuffer")) {
573		printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
574		framebuffer_release(info);
575		return -ENXIO;
576	}
577
578	/* frame buffer - map only 4MB */
579	pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
580	pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
581					_PAGE_WRITETHRU);
582	pinfo->base_frame_buffer = pinfo->frame_buffer;
583
584	/* registers */
585	pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
586	pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
587
588	pinfo->cmap_regs_phys = 0xf301b000;	/* XXX not in prom? */
589	request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
590	pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
591
592	/* Grok total video ram */
593	out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
594	out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);	/* select max vram */
595	out_be32(&pinfo->platinum_regs->reg[24].r, 0);	/* switch in vram */
596
597	fbuffer = pinfo->base_frame_buffer;
598	fbuffer[0x100000] = 0x34;
599	fbuffer[0x100008] = 0x0;
600	invalidate_cache(&fbuffer[0x100000]);
601	fbuffer[0x200000] = 0x56;
602	fbuffer[0x200008] = 0x0;
603	invalidate_cache(&fbuffer[0x200000]);
604	fbuffer[0x300000] = 0x78;
605	fbuffer[0x300008] = 0x0;
606	invalidate_cache(&fbuffer[0x300000]);
607	bank0 = 1; /* builtin 1MB vram, always there */
608	bank1 = fbuffer[0x100000] == 0x34;
609	bank2 = fbuffer[0x200000] == 0x56;
610	bank3 = fbuffer[0x300000] == 0x78;
611	pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
612	printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
613	       (unsigned int) (pinfo->total_vram / 1024 / 1024),
614	       bank3, bank2, bank1, bank0);
615
616	/*
617	 * Try to determine whether we have an old or a new DACula.
618	 */
619	out_8(&pinfo->cmap_regs->addr, 0x40);
620	pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
621	switch (pinfo->dactype) {
622	case 0x3c:
623		pinfo->clktype = 1;
624		printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
625		break;
626	case 0x84:
627		pinfo->clktype = 0;
628		printk(KERN_INFO "platinumfb: DACula type 0x84\n");
629		break;
630	default:
631		pinfo->clktype = 0;
632		printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
633		break;
634	}
635	dev_set_drvdata(&odev->dev, info);
636
637	rc = platinum_init_fb(info);
638	if (rc != 0) {
639		iounmap(pinfo->frame_buffer);
640		iounmap(pinfo->platinum_regs);
641		iounmap(pinfo->cmap_regs);
642		framebuffer_release(info);
643	}
644
645	return rc;
646}
647
648static int 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
670static struct of_device_id platinumfb_match[] =
671{
672	{
673	.name 		= "platinum",
674	},
675	{},
676};
677
678static struct platform_driver platinum_driver =
679{
680	.driver = {
681		.name = "platinumfb",
682		.of_match_table = platinumfb_match,
683	},
684	.probe		= platinumfb_probe,
685	.remove		= platinumfb_remove,
686};
687
688static int __init platinumfb_init(void)
689{
690#ifndef MODULE
691	char *option = NULL;
692
693	if (fb_get_options("platinumfb", &option))
694		return -ENODEV;
695	platinumfb_setup(option);
696#endif
697	platform_driver_register(&platinum_driver);
698
699	return 0;
700}
701
702static void __exit platinumfb_exit(void)
703{
704	platform_driver_unregister(&platinum_driver);
705}
706
707MODULE_LICENSE("GPL");
708MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
709module_init(platinumfb_init);
710
711#ifdef MODULE
712module_exit(platinumfb_exit);
713#endif
714