summaryrefslogtreecommitdiff
path: root/drivers/video/vt8623fb.c
blob: f6895ef6bf5944f40e60138942f520c085704a44 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
/*
 * linux/drivers/video/vt8623fb.c - fbdev driver for
 * integrated graphic core in VIA VT8623 [CLE266] chipset
 *
 * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 *
 * Code is based on s3fb, some parts are from David Boucher's viafb
 * (http://davesdomain.org.uk/viafb/)
 */

#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/svga.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
#include <video/vga.h>

#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

struct vt8623fb_info {
	char __iomem *mmio_base;
	int mtrr_reg;
	struct vgastate state;
	struct mutex open_lock;
	unsigned int ref_count;
	u32 pseudo_palette[16];
};



/* ------------------------------------------------------------------------- */

static const struct svga_fb_format vt8623fb_formats[] = {
	{ 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
		FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8,	FB_VISUAL_PSEUDOCOLOR, 16, 16},
	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
		FB_TYPE_INTERLEAVED_PLANES, 1,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
	{ 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 8, 8},
/*	{16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},	*/
	{16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},
	{32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 2, 2},
	SVGA_FORMAT_END
};

static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
	60000, 300000, 14318};

/* CRT timing register sets */

static struct vga_regset vt8623_h_total_regs[]       = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
static struct vga_regset vt8623_h_display_regs[]     = {{0x01, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_h_blank_end_regs[]   = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
static struct vga_regset vt8623_h_sync_start_regs[]  = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
static struct vga_regset vt8623_h_sync_end_regs[]    = {{0x05, 0, 4}, VGA_REGSET_END};

static struct vga_regset vt8623_v_total_regs[]       = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
static struct vga_regset vt8623_v_display_regs[]     = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
static struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
static struct vga_regset vt8623_v_blank_end_regs[]   = {{0x16, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_v_sync_start_regs[]  = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
static struct vga_regset vt8623_v_sync_end_regs[]    = {{0x11, 0, 3}, VGA_REGSET_END};

static struct vga_regset vt8623_offset_regs[]        = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_line_compare_regs[]  = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
static struct vga_regset vt8623_fetch_count_regs[]   = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
static struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};

static struct svga_timing_regs vt8623_timing_regs     = {
	vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
	vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
	vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
	vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
};


/* ------------------------------------------------------------------------- */


/* Module parameters */

static char *mode_option = "640x480-8@60";

#ifdef CONFIG_MTRR
static int mtrr = 1;
#endif

MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");

module_param(mode_option, charp, 0644);
MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
module_param_named(mode, mode_option, charp, 0);
MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");

#ifdef CONFIG_MTRR
module_param(mtrr, int, 0444);
MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
#endif


/* ------------------------------------------------------------------------- */


static struct fb_tile_ops vt8623fb_tile_ops = {
	.fb_settile	= svga_settile,
	.fb_tilecopy	= svga_tilecopy,
	.fb_tilefill    = svga_tilefill,
	.fb_tileblit    = svga_tileblit,
	.fb_tilecursor  = svga_tilecursor,
	.fb_get_tilemax = svga_get_tilemax,
};


/* ------------------------------------------------------------------------- */


/* image data is MSB-first, fb structure is MSB-first too */
static inline u32 expand_color(u32 c)
{
	return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
}

/* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
{
	u32 fg = expand_color(image->fg_color);
	u32 bg = expand_color(image->bg_color);
	const u8 *src1, *src;
	u8 __iomem *dst1;
	u32 __iomem *dst;
	u32 val;
	int x, y;

	src1 = image->data;
	dst1 = info->screen_base + (image->dy * info->fix.line_length)
		 + ((image->dx / 8) * 4);

	for (y = 0; y < image->height; y++) {
		src = src1;
		dst = (u32 __iomem *) dst1;
		for (x = 0; x < image->width; x += 8) {
			val = *(src++) * 0x01010101;
			val = (val & fg) | (~val & bg);
			fb_writel(val, dst++);
		}
		src1 += image->width / 8;
		dst1 += info->fix.line_length;
	}
}

/* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	u32 fg = expand_color(rect->color);
	u8 __iomem *dst1;
	u32 __iomem *dst;
	int x, y;

	dst1 = info->screen_base + (rect->dy * info->fix.line_length)
		 + ((rect->dx / 8) * 4);

	for (y = 0; y < rect->height; y++) {
		dst = (u32 __iomem *) dst1;
		for (x = 0; x < rect->width; x += 8) {
			fb_writel(fg, dst++);
		}
		dst1 += info->fix.line_length;
	}
}


/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
static inline u32 expand_pixel(u32 c)
{
	return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
		((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
}

/* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
{
	u32 fg = image->fg_color * 0x11111111;
	u32 bg = image->bg_color * 0x11111111;
	const u8 *src1, *src;
	u8 __iomem *dst1;
	u32 __iomem *dst;
	u32 val;
	int x, y;

	src1 = image->data;
	dst1 = info->screen_base + (image->dy * info->fix.line_length)
		 + ((image->dx / 8) * 4);

	for (y = 0; y < image->height; y++) {
		src = src1;
		dst = (u32 __iomem *) dst1;
		for (x = 0; x < image->width; x += 8) {
			val = expand_pixel(*(src++));
			val = (val & fg) | (~val & bg);
			fb_writel(val, dst++);
		}
		src1 += image->width / 8;
		dst1 += info->fix.line_length;
	}
}

static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
	if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
	    && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
		if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
			vt8623fb_iplan_imageblit(info, image);
		else
			vt8623fb_cfb4_imageblit(info, image);
	} else
		cfb_imageblit(info, image);
}

static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	if ((info->var.bits_per_pixel == 4)
	    && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
	    && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
		vt8623fb_iplan_fillrect(info, rect);
	 else
		cfb_fillrect(info, rect);
}


/* ------------------------------------------------------------------------- */


static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
{
	u16 m, n, r;
	u8 regval;
	int rv;

	rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
	if (rv < 0) {
		printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
		return;
	}

	/* Set VGA misc register  */
	regval = vga_r(NULL, VGA_MIS_R);
	vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);

	/* Set clock registers */
	vga_wseq(NULL, 0x46, (n  | (r << 6)));
	vga_wseq(NULL, 0x47, m);

	udelay(1000);

	/* PLL reset */
	svga_wseq_mask(0x40, 0x02, 0x02);
	svga_wseq_mask(0x40, 0x00, 0x02);
}


static int vt8623fb_open(struct fb_info *info, int user)
{
	struct vt8623fb_info *par = info->par;

	mutex_lock(&(par->open_lock));
	if (par->ref_count == 0) {
		memset(&(par->state), 0, sizeof(struct vgastate));
		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
		par->state.num_crtc = 0xA2;
		par->state.num_seq = 0x50;
		save_vga(&(par->state));
	}

	par->ref_count++;
	mutex_unlock(&(par->open_lock));

	return 0;
}

static int vt8623fb_release(struct fb_info *info, int user)
{
	struct vt8623fb_info *par = info->par;

	mutex_lock(&(par->open_lock));
	if (par->ref_count == 0) {
		mutex_unlock(&(par->open_lock));
		return -EINVAL;
	}

	if (par->ref_count == 1)
		restore_vga(&(par->state));

	par->ref_count--;
	mutex_unlock(&(par->open_lock));

	return 0;
}

static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	int rv, mem, step;

	/* Find appropriate format */
	rv = svga_match_format (vt8623fb_formats, var, NULL);
	if (rv < 0)
	{
		printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
		return rv;
	}

	/* Do not allow to have real resoulution larger than virtual */
	if (var->xres > var->xres_virtual)
		var->xres_virtual = var->xres;

	if (var->yres > var->yres_virtual)
		var->yres_virtual = var->yres;

	/* Round up xres_virtual to have proper alignment of lines */
	step = vt8623fb_formats[rv].xresstep - 1;
	var->xres_virtual = (var->xres_virtual+step) & ~step;

	/* Check whether have enough memory */
	mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
	if (mem > info->screen_size)
	{
		printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
		return -EINVAL;
	}

	/* Text mode is limited to 256 kB of memory */
	if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
	{
		printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
		return -EINVAL;
	}

	rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
	if (rv < 0)
	{
		printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
		return rv;
	}

	/* Interlaced mode not supported */
	if (var->vmode & FB_VMODE_INTERLACED)
		return -EINVAL;

	return 0;
}


static int vt8623fb_set_par(struct fb_info *info)
{
	u32 mode, offset_value, fetch_value, screen_size;
	u32 bpp = info->var.bits_per_pixel;

	if (bpp != 0) {
		info->fix.ypanstep = 1;
		info->fix.line_length = (info->var.xres_virtual * bpp) / 8;

		info->flags &= ~FBINFO_MISC_TILEBLITTING;
		info->tileops = NULL;

		/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
		info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
		info->pixmap.blit_y = ~(u32)0;

		offset_value = (info->var.xres_virtual * bpp) / 64;
		fetch_value  = ((info->var.xres * bpp) / 128) + 4;

		if (bpp == 4)
			fetch_value  = (info->var.xres / 8) + 8; /* + 0 is OK */

		screen_size  = info->var.yres_virtual * info->fix.line_length;
	} else {
		info->fix.ypanstep = 16;
		info->fix.line_length = 0;

		info->flags |= FBINFO_MISC_TILEBLITTING;
		info->tileops = &vt8623fb_tile_ops;

		/* supports 8x16 tiles only */
		info->pixmap.blit_x = 1 << (8 - 1);
		info->pixmap.blit_y = 1 << (16 - 1);

		offset_value = info->var.xres_virtual / 16;
		fetch_value  = (info->var.xres / 8) + 8;
		screen_size  = (info->var.xres_virtual * info->var.yres_virtual) / 64;
	}

	info->var.xoffset = 0;
	info->var.yoffset = 0;
	info->var.activate = FB_ACTIVATE_NOW;

	/* Unlock registers */
	svga_wseq_mask(0x10, 0x01, 0x01);
	svga_wcrt_mask(0x11, 0x00, 0x80);
	svga_wcrt_mask(0x47, 0x00, 0x01);

	/* Device, screen and sync off */
	svga_wseq_mask(0x01, 0x20, 0x20);
	svga_wcrt_mask(0x36, 0x30, 0x30);
	svga_wcrt_mask(0x17, 0x00, 0x80);

	/* Set default values */
	svga_set_default_gfx_regs();
	svga_set_default_atc_regs();
	svga_set_default_seq_regs();
	svga_set_default_crt_regs();
	svga_wcrt_multi(vt8623_line_compare_regs, 0xFFFFFFFF);
	svga_wcrt_multi(vt8623_start_address_regs, 0);

	svga_wcrt_multi(vt8623_offset_regs, offset_value);
	svga_wseq_multi(vt8623_fetch_count_regs, fetch_value);

	if (info->var.vmode & FB_VMODE_DOUBLE)
		svga_wcrt_mask(0x09, 0x80, 0x80);
	else
		svga_wcrt_mask(0x09, 0x00, 0x80);

	svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus
	svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus
	svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read treshold
	vga_wseq(NULL, 0x17, 0x1F);       // FIFO depth
	vga_wseq(NULL, 0x18, 0x4E);
	svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ?

	vga_wcrt(NULL, 0x32, 0x00);
	vga_wcrt(NULL, 0x34, 0x00);
	vga_wcrt(NULL, 0x6A, 0x80);
	vga_wcrt(NULL, 0x6A, 0xC0);

	vga_wgfx(NULL, 0x20, 0x00);
	vga_wgfx(NULL, 0x21, 0x00);
	vga_wgfx(NULL, 0x22, 0x00);

	/* Set SR15 according to number of bits per pixel */
	mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
	switch (mode) {
	case 0:
		pr_debug("fb%d: text mode\n", info->node);
		svga_set_textmode_vga_regs();
		svga_wseq_mask(0x15, 0x00, 0xFE);
		svga_wcrt_mask(0x11, 0x60, 0x70);
		break;
	case 1:
		pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
		vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
		svga_wseq_mask(0x15, 0x20, 0xFE);
		svga_wcrt_mask(0x11, 0x00, 0x70);
		break;
	case 2:
		pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
		svga_wseq_mask(0x15, 0x00, 0xFE);
		svga_wcrt_mask(0x11, 0x00, 0x70);
		break;
	case 3:
		pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
		svga_wseq_mask(0x15, 0x22, 0xFE);
		break;
	case 4:
		pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
		svga_wseq_mask(0x15, 0xB6, 0xFE);
		break;
	case 5:
		pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
		svga_wseq_mask(0x15, 0xAE, 0xFE);
		break;
	default:
		printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
		return (-EINVAL);
	}

	vt8623_set_pixclock(info, info->var.pixclock);
	svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1,
			 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
			 1, info->node);

	memset_io(info->screen_base, 0x00, screen_size);

	/* Device and screen back on */
	svga_wcrt_mask(0x17, 0x80, 0x80);
	svga_wcrt_mask(0x36, 0x00, 0x30);
	svga_wseq_mask(0x01, 0x00, 0x20);

	return 0;
}


static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
				u_int transp, struct fb_info *fb)
{
	switch (fb->var.bits_per_pixel) {
	case 0:
	case 4:
		if (regno >= 16)
			return -EINVAL;

		outb(0x0F, VGA_PEL_MSK);
		outb(regno, VGA_PEL_IW);
		outb(red >> 10, VGA_PEL_D);
		outb(green >> 10, VGA_PEL_D);
		outb(blue >> 10, VGA_PEL_D);
		break;
	case 8:
		if (regno >= 256)
			return -EINVAL;

		outb(0xFF, VGA_PEL_MSK);
		outb(regno, VGA_PEL_IW);
		outb(red >> 10, VGA_PEL_D);
		outb(green >> 10, VGA_PEL_D);
		outb(blue >> 10, VGA_PEL_D);
		break;
	case 16:
		if (regno >= 16)
			return 0;

		if (fb->var.green.length == 5)
			((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
				((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
		else if (fb->var.green.length == 6)
			((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
				((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
		else
			return -EINVAL;
		break;
	case 24:
	case 32:
		if (regno >= 16)
			return 0;

		/* ((transp & 0xFF00) << 16) */
		((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
			(green & 0xFF00) | ((blue & 0xFF00) >> 8);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}


static int vt8623fb_blank(int blank_mode, struct fb_info *info)
{
	switch (blank_mode) {
	case FB_BLANK_UNBLANK:
		pr_debug("fb%d: unblank\n", info->node);
		svga_wcrt_mask(0x36, 0x00, 0x30);
		svga_wseq_mask(0x01, 0x00, 0x20);
		break;
	case FB_BLANK_NORMAL:
		pr_debug("fb%d: blank\n", info->node);
		svga_wcrt_mask(0x36, 0x00, 0x30);
		svga_wseq_mask(0x01, 0x20, 0x20);
		break;
	case FB_BLANK_HSYNC_SUSPEND:
		pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
		svga_wcrt_mask(0x36, 0x10, 0x30);
		svga_wseq_mask(0x01, 0x20, 0x20);
		break;
	case FB_BLANK_VSYNC_SUSPEND:
		pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
		svga_wcrt_mask(0x36, 0x20, 0x30);
		svga_wseq_mask(0x01, 0x20, 0x20);
		break;
	case FB_BLANK_POWERDOWN:
		pr_debug("fb%d: DPMS off (no sync)\n", info->node);
		svga_wcrt_mask(0x36, 0x30, 0x30);
		svga_wseq_mask(0x01, 0x20, 0x20);
		break;
	}

	return 0;
}


static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	unsigned int offset;

	/* Calculate the offset */
	if (var->bits_per_pixel == 0) {
		offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset;
		offset = offset >> 3;
	} else {
		offset = (var->yoffset * info->fix.line_length) +
			 (var->xoffset * var->bits_per_pixel / 8);
		offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);
	}

	/* Set the offset */
	svga_wcrt_multi(vt8623_start_address_regs, offset);

	return 0;
}


/* ------------------------------------------------------------------------- */


/* Frame buffer operations */

static struct fb_ops vt8623fb_ops = {
	.owner		= THIS_MODULE,
	.fb_open	= vt8623fb_open,
	.fb_release	= vt8623fb_release,
	.fb_check_var	= vt8623fb_check_var,
	.fb_set_par	= vt8623fb_set_par,
	.fb_setcolreg	= vt8623fb_setcolreg,
	.fb_blank	= vt8623fb_blank,
	.fb_pan_display	= vt8623fb_pan_display,
	.fb_fillrect	= vt8623fb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= vt8623fb_imageblit,
	.fb_get_caps    = svga_get_caps,
};


/* PCI probe */

static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
	struct fb_info *info;
	struct vt8623fb_info *par;
	unsigned int memsize1, memsize2;
	int rc;

	/* Ignore secondary VGA device because there is no VGA arbitration */
	if (! svga_primary_device(dev)) {
		dev_info(&(dev->dev), "ignoring secondary device\n");
		return -ENODEV;
	}

	/* Allocate and fill driver data structure */
	info = framebuffer_alloc(sizeof(struct vt8623fb_info), NULL);
	if (! info) {
		dev_err(&(dev->dev), "cannot allocate memory\n");
		return -ENOMEM;
	}

	par = info->par;
	mutex_init(&par->open_lock);

	info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
	info->fbops = &vt8623fb_ops;

	/* Prepare PCI device */

	rc = pci_enable_device(dev);
	if (rc < 0) {
		dev_err(&(dev->dev), "cannot enable PCI device\n");
		goto err_enable_device;
	}

	rc = pci_request_regions(dev, "vt8623fb");
	if (rc < 0) {
		dev_err(&(dev->dev), "cannot reserve framebuffer region\n");
		goto err_request_regions;
	}

	info->fix.smem_start = pci_resource_start(dev, 0);
	info->fix.smem_len = pci_resource_len(dev, 0);
	info->fix.mmio_start = pci_resource_start(dev, 1);
	info->fix.mmio_len = pci_resource_len(dev, 1);

	/* Map physical IO memory address into kernel space */
	info->screen_base = pci_iomap(dev, 0, 0);
	if (! info->screen_base) {
		rc = -ENOMEM;
		dev_err(&(dev->dev), "iomap for framebuffer failed\n");
		goto err_iomap_1;
	}

	par->mmio_base = pci_iomap(dev, 1, 0);
	if (! par->mmio_base) {
		rc = -ENOMEM;
		dev_err(&(dev->dev), "iomap for MMIO failed\n");
		goto err_iomap_2;
	}

	/* Find how many physical memory there is on card */
	memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1;
	memsize2 = vga_rseq(NULL, 0x39) << 2;

	if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
		info->screen_size = memsize1 << 20;
	else {
		dev_err(&(dev->dev), "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
		info->screen_size = 16 << 20;
	}

	info->fix.smem_len = info->screen_size;
	strcpy(info->fix.id, "VIA VT8623");
	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
	info->fix.ypanstep = 0;
	info->fix.accel = FB_ACCEL_NONE;
	info->pseudo_palette = (void*)par->pseudo_palette;

	/* Prepare startup mode */

	rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
	if (! ((rc == 1) || (rc == 2))) {
		rc = -EINVAL;
		dev_err(&(dev->dev), "mode %s not found\n", mode_option);
		goto err_find_mode;
	}

	rc = fb_alloc_cmap(&info->cmap, 256, 0);
	if (rc < 0) {
		dev_err(&(dev->dev), "cannot allocate colormap\n");
		goto err_alloc_cmap;
	}

	rc = register_framebuffer(info);
	if (rc < 0) {
		dev_err(&(dev->dev), "cannot register framebugger\n");
		goto err_reg_fb;
	}

	printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
		 pci_name(dev), info->fix.smem_len >> 20);

	/* Record a reference to the driver data */
	pci_set_drvdata(dev, info);

#ifdef CONFIG_MTRR
	if (mtrr) {
		par->mtrr_reg = -1;
		par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
	}
#endif

	return 0;

	/* Error handling */
err_reg_fb:
	fb_dealloc_cmap(&info->cmap);
err_alloc_cmap:
err_find_mode:
	pci_iounmap(dev, par->mmio_base);
err_iomap_2:
	pci_iounmap(dev, info->screen_base);
err_iomap_1:
	pci_release_regions(dev);
err_request_regions:
/*	pci_disable_device(dev); */
err_enable_device:
	framebuffer_release(info);
	return rc;
}

/* PCI remove */

static void __devexit vt8623_pci_remove(struct pci_dev *dev)
{
	struct fb_info *info = pci_get_drvdata(dev);

	if (info) {
		struct vt8623fb_info *par = info->par;

#ifdef CONFIG_MTRR
		if (par->mtrr_reg >= 0) {
			mtrr_del(par->mtrr_reg, 0, 0);
			par->mtrr_reg = -1;
		}
#endif

		unregister_framebuffer(info);
		fb_dealloc_cmap(&info->cmap);

		pci_iounmap(dev, info->screen_base);
		pci_iounmap(dev, par->mmio_base);
		pci_release_regions(dev);
/*		pci_disable_device(dev); */

		pci_set_drvdata(dev, NULL);
		framebuffer_release(info);
	}
}


#ifdef CONFIG_PM
/* PCI suspend */

static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
{
	struct fb_info *info = pci_get_drvdata(dev);
	struct vt8623fb_info *par = info->par;

	dev_info(&(dev->dev), "suspend\n");

	acquire_console_sem();
	mutex_lock(&(par->open_lock));

	if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
		mutex_unlock(&(par->open_lock));
		release_console_sem();
		return 0;
	}

	fb_set_suspend(info, 1);

	pci_save_state(dev);
	pci_disable_device(dev);
	pci_set_power_state(dev, pci_choose_state(dev, state));

	mutex_unlock(&(par->open_lock));
	release_console_sem();

	return 0;
}


/* PCI resume */

static int vt8623_pci_resume(struct pci_dev* dev)
{
	struct fb_info *info = pci_get_drvdata(dev);
	struct vt8623fb_info *par = info->par;

	dev_info(&(dev->dev), "resume\n");

	acquire_console_sem();
	mutex_lock(&(par->open_lock));

	if (par->ref_count == 0) {
		mutex_unlock(&(par->open_lock));
		release_console_sem();
		return 0;
	}

	pci_set_power_state(dev, PCI_D0);
	pci_restore_state(dev);

	if (pci_enable_device(dev))
		goto fail;

	pci_set_master(dev);

	vt8623fb_set_par(info);
	fb_set_suspend(info, 0);

	mutex_unlock(&(par->open_lock));
fail:
	release_console_sem();

	return 0;
}
#else
#define vt8623_pci_suspend NULL
#define vt8623_pci_resume NULL
#endif /* CONFIG_PM */

/* List of boards that we are trying to support */

static struct pci_device_id vt8623_devices[] __devinitdata = {
	{PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
	{0, 0, 0, 0, 0, 0, 0}
};

MODULE_DEVICE_TABLE(pci, vt8623_devices);

static struct pci_driver vt8623fb_pci_driver = {
	.name		= "vt8623fb",
	.id_table	= vt8623_devices,
	.probe		= vt8623_pci_probe,
	.remove		= __devexit_p(vt8623_pci_remove),
	.suspend	= vt8623_pci_suspend,
	.resume		= vt8623_pci_resume,
};

/* Cleanup */

static void __exit vt8623fb_cleanup(void)
{
	pr_debug("vt8623fb: cleaning up\n");
	pci_unregister_driver(&vt8623fb_pci_driver);
}

/* Driver Initialisation */

static int __init vt8623fb_init(void)
{

#ifndef MODULE
	char *option = NULL;

	if (fb_get_options("vt8623fb", &option))
		return -ENODEV;

	if (option && *option)
		mode_option = option;
#endif

	pr_debug("vt8623fb: initializing\n");
	return pci_register_driver(&vt8623fb_pci_driver);
}

/* ------------------------------------------------------------------------- */

/* Modularization */

module_init(vt8623fb_init);
module_exit(vt8623fb_cleanup);