summaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/ivtv/ivtvfb.c
blob: b19058e36853deac8bb5d2d0b17c88eb8416edb3 (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
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
/*
    On Screen Display cx23415 Framebuffer driver

    This module presents the cx23415 OSD (onscreen display) framebuffer memory
    as a standard Linux /dev/fb style framebuffer device. The framebuffer has
    support for 8, 16 & 32 bpp packed pixel formats with alpha channel. In 16bpp
    mode, there is a choice of a three color depths (12, 15 or 16 bits), but no
    local alpha. The colorspace is selectable between rgb & yuv.
    Depending on the TV standard configured in the ivtv module at load time,
    the initial resolution is either 640x400 (NTSC) or 640x480 (PAL) at 8bpp.
    Video timings are locked to ensure a vertical refresh rate of 50Hz (PAL)
    or 59.94 (NTSC)

    Copyright (c) 2003 Matt T. Yourst <yourst@yourst.com>

    Derived from drivers/video/vesafb.c
    Portions (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>

    2.6 kernel port:
    Copyright (C) 2004 Matthias Badaire

    Copyright (C) 2004  Chris Kennedy <c@groovy.org>

    Copyright (C) 2006  Ian Armstrong <ian@iarmst.demon.co.uk>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ivtv-driver.h"
#include "ivtv-cards.h"
#include "ivtv-i2c.h"
#include "ivtv-udma.h"
#include "ivtv-mailbox.h"
#include "ivtv-firmware.h"

#include <linux/fb.h>
#include <linux/ivtvfb.h>

#ifdef CONFIG_X86_64
#include <asm/pat.h>
#endif

/* card parameters */
static int ivtvfb_card_id = -1;
static int ivtvfb_debug = 0;
static bool osd_laced;
static int osd_depth;
static int osd_upper;
static int osd_left;
static int osd_yres;
static int osd_xres;

module_param(ivtvfb_card_id, int, 0444);
module_param_named(debug,ivtvfb_debug, int, 0644);
module_param(osd_laced, bool, 0444);
module_param(osd_depth, int, 0444);
module_param(osd_upper, int, 0444);
module_param(osd_left, int, 0444);
module_param(osd_yres, int, 0444);
module_param(osd_xres, int, 0444);

MODULE_PARM_DESC(ivtvfb_card_id,
		 "Only use framebuffer of the specified ivtv card (0-31)\n"
		 "\t\t\tdefault -1: initialize all available framebuffers");

MODULE_PARM_DESC(debug,
		 "Debug level (bitmask). Default: errors only\n"
		 "\t\t\t(debug = 3 gives full debugging)");

/* Why upper, left, xres, yres, depth, laced ? To match terminology used
   by fbset.
   Why start at 1 for left & upper coordinate ? Because X doesn't allow 0 */

MODULE_PARM_DESC(osd_laced,
		 "Interlaced mode\n"
		 "\t\t\t0=off\n"
		 "\t\t\t1=on\n"
		 "\t\t\tdefault off");

MODULE_PARM_DESC(osd_depth,
		 "Bits per pixel - 8, 16, 32\n"
		 "\t\t\tdefault 8");

MODULE_PARM_DESC(osd_upper,
		 "Vertical start position\n"
		 "\t\t\tdefault 0 (Centered)");

MODULE_PARM_DESC(osd_left,
		 "Horizontal start position\n"
		 "\t\t\tdefault 0 (Centered)");

MODULE_PARM_DESC(osd_yres,
		 "Display height\n"
		 "\t\t\tdefault 480 (PAL)\n"
		 "\t\t\t        400 (NTSC)");

MODULE_PARM_DESC(osd_xres,
		 "Display width\n"
		 "\t\t\tdefault 640");

MODULE_AUTHOR("Kevin Thayer, Chris Kennedy, Hans Verkuil, John Harvey, Ian Armstrong");
MODULE_LICENSE("GPL");

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

#define IVTVFB_DBGFLG_WARN  (1 << 0)
#define IVTVFB_DBGFLG_INFO  (1 << 1)

#define IVTVFB_DEBUG(x, type, fmt, args...) \
	do { \
		if ((x) & ivtvfb_debug) \
			printk(KERN_INFO "ivtvfb%d " type ": " fmt, itv->instance , ## args); \
	} while (0)
#define IVTVFB_DEBUG_WARN(fmt, args...)  IVTVFB_DEBUG(IVTVFB_DBGFLG_WARN, "warning", fmt , ## args)
#define IVTVFB_DEBUG_INFO(fmt, args...)  IVTVFB_DEBUG(IVTVFB_DBGFLG_INFO, "info", fmt , ## args)

/* Standard kernel messages */
#define IVTVFB_ERR(fmt, args...)   printk(KERN_ERR  "ivtvfb%d: " fmt, itv->instance , ## args)
#define IVTVFB_WARN(fmt, args...)  printk(KERN_WARNING  "ivtvfb%d: " fmt, itv->instance , ## args)
#define IVTVFB_INFO(fmt, args...)  printk(KERN_INFO "ivtvfb%d: " fmt, itv->instance , ## args)

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

#define IVTV_OSD_MAX_WIDTH  720
#define IVTV_OSD_MAX_HEIGHT 576

#define IVTV_OSD_BPP_8      0x00
#define IVTV_OSD_BPP_16_444 0x03
#define IVTV_OSD_BPP_16_555 0x02
#define IVTV_OSD_BPP_16_565 0x01
#define IVTV_OSD_BPP_32     0x04

struct osd_info {
	/* Physical base address */
	unsigned long video_pbase;
	/* Relative base address (relative to start of decoder memory) */
	u32 video_rbase;
	/* Mapped base address */
	volatile char __iomem *video_vbase;
	/* Buffer size */
	u32 video_buffer_size;

	/* video_base rounded down as required by hardware MTRRs */
	unsigned long fb_start_aligned_physaddr;
	/* video_base rounded up as required by hardware MTRRs */
	unsigned long fb_end_aligned_physaddr;
	int wc_cookie;

	/* Store the buffer offset */
	int set_osd_coords_x;
	int set_osd_coords_y;

	/* Current dimensions (NOT VISIBLE SIZE!) */
	int display_width;
	int display_height;
	int display_byte_stride;

	/* Current bits per pixel */
	int bits_per_pixel;
	int bytes_per_pixel;

	/* Frame buffer stuff */
	struct fb_info ivtvfb_info;
	struct fb_var_screeninfo ivtvfb_defined;
	struct fb_fix_screeninfo ivtvfb_fix;

	/* Used for a warm start */
	struct fb_var_screeninfo fbvar_cur;
	int blank_cur;
	u32 palette_cur[256];
	u32 pan_cur;
};

struct ivtv_osd_coords {
	unsigned long offset;
	unsigned long max_offset;
	int pixel_stride;
	int lines;
	int x;
	int y;
};

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

/* ivtv API calls for framebuffer related support */

static int ivtvfb_get_framebuffer(struct ivtv *itv, u32 *fbbase,
				       u32 *fblength)
{
	u32 data[CX2341X_MBOX_MAX_DATA];
	int rc;

	ivtv_firmware_check(itv, "ivtvfb_get_framebuffer");
	rc = ivtv_vapi_result(itv, data, CX2341X_OSD_GET_FRAMEBUFFER, 0);
	*fbbase = data[0];
	*fblength = data[1];
	return rc;
}

static int ivtvfb_get_osd_coords(struct ivtv *itv,
				      struct ivtv_osd_coords *osd)
{
	struct osd_info *oi = itv->osd_info;
	u32 data[CX2341X_MBOX_MAX_DATA];

	ivtv_vapi_result(itv, data, CX2341X_OSD_GET_OSD_COORDS, 0);

	osd->offset = data[0] - oi->video_rbase;
	osd->max_offset = oi->display_width * oi->display_height * 4;
	osd->pixel_stride = data[1];
	osd->lines = data[2];
	osd->x = data[3];
	osd->y = data[4];
	return 0;
}

static int ivtvfb_set_osd_coords(struct ivtv *itv, const struct ivtv_osd_coords *osd)
{
	struct osd_info *oi = itv->osd_info;

	oi->display_width = osd->pixel_stride;
	oi->display_byte_stride = osd->pixel_stride * oi->bytes_per_pixel;
	oi->set_osd_coords_x += osd->x;
	oi->set_osd_coords_y = osd->y;

	return ivtv_vapi(itv, CX2341X_OSD_SET_OSD_COORDS, 5,
			osd->offset + oi->video_rbase,
			osd->pixel_stride,
			osd->lines, osd->x, osd->y);
}

static int ivtvfb_set_display_window(struct ivtv *itv, struct v4l2_rect *ivtv_window)
{
	int osd_height_limit = itv->is_out_50hz ? 576 : 480;

	/* Only fail if resolution too high, otherwise fudge the start coords. */
	if ((ivtv_window->height > osd_height_limit) || (ivtv_window->width > IVTV_OSD_MAX_WIDTH))
		return -EINVAL;

	/* Ensure we don't exceed display limits */
	if (ivtv_window->top + ivtv_window->height > osd_height_limit) {
		IVTVFB_DEBUG_WARN("ivtv_ioctl_fb_set_display_window - Invalid height setting (%d, %d)\n",
			ivtv_window->top, ivtv_window->height);
		ivtv_window->top = osd_height_limit - ivtv_window->height;
	}

	if (ivtv_window->left + ivtv_window->width > IVTV_OSD_MAX_WIDTH) {
		IVTVFB_DEBUG_WARN("ivtv_ioctl_fb_set_display_window - Invalid width setting (%d, %d)\n",
			ivtv_window->left, ivtv_window->width);
		ivtv_window->left = IVTV_OSD_MAX_WIDTH - ivtv_window->width;
	}

	/* Set the OSD origin */
	write_reg((ivtv_window->top << 16) | ivtv_window->left, 0x02a04);

	/* How much to display */
	write_reg(((ivtv_window->top+ivtv_window->height) << 16) | (ivtv_window->left+ivtv_window->width), 0x02a08);

	/* Pass this info back the yuv handler */
	itv->yuv_info.osd_vis_w = ivtv_window->width;
	itv->yuv_info.osd_vis_h = ivtv_window->height;
	itv->yuv_info.osd_x_offset = ivtv_window->left;
	itv->yuv_info.osd_y_offset = ivtv_window->top;

	return 0;
}

static int ivtvfb_prep_dec_dma_to_device(struct ivtv *itv,
				  unsigned long ivtv_dest_addr, void __user *userbuf,
				  int size_in_bytes)
{
	DEFINE_WAIT(wait);
	int got_sig = 0;

	mutex_lock(&itv->udma.lock);
	/* Map User DMA */
	if (ivtv_udma_setup(itv, ivtv_dest_addr, userbuf, size_in_bytes) <= 0) {
		mutex_unlock(&itv->udma.lock);
		IVTVFB_WARN("ivtvfb_prep_dec_dma_to_device, Error with get_user_pages: %d bytes, %d pages returned\n",
			       size_in_bytes, itv->udma.page_count);

		/* get_user_pages must have failed completely */
		return -EIO;
	}

	IVTVFB_DEBUG_INFO("ivtvfb_prep_dec_dma_to_device, %d bytes, %d pages\n",
		       size_in_bytes, itv->udma.page_count);

	ivtv_udma_prepare(itv);
	prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
	/* if no UDMA is pending and no UDMA is in progress, then the DMA
	   is finished */
	while (test_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags) ||
	       test_bit(IVTV_F_I_UDMA, &itv->i_flags)) {
		/* don't interrupt if the DMA is in progress but break off
		   a still pending DMA. */
		got_sig = signal_pending(current);
		if (got_sig && test_and_clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags))
			break;
		got_sig = 0;
		schedule();
	}
	finish_wait(&itv->dma_waitq, &wait);

	/* Unmap Last DMA Xfer */
	ivtv_udma_unmap(itv);
	mutex_unlock(&itv->udma.lock);
	if (got_sig) {
		IVTV_DEBUG_INFO("User stopped OSD\n");
		return -EINTR;
	}

	return 0;
}

static int ivtvfb_prep_frame(struct ivtv *itv, int cmd, void __user *source,
			      unsigned long dest_offset, int count)
{
	DEFINE_WAIT(wait);
	struct osd_info *oi = itv->osd_info;

	/* Nothing to do */
	if (count == 0) {
		IVTVFB_DEBUG_WARN("ivtvfb_prep_frame: Nothing to do. count = 0\n");
		return -EINVAL;
	}

	/* Check Total FB Size */
	if ((dest_offset + count) > oi->video_buffer_size) {
		IVTVFB_WARN("ivtvfb_prep_frame: Overflowing the framebuffer %ld, only %d available\n",
			dest_offset + count, oi->video_buffer_size);
		return -E2BIG;
	}

	/* Not fatal, but will have undesirable results */
	if ((unsigned long)source & 3)
		IVTVFB_WARN("ivtvfb_prep_frame: Source address not 32 bit aligned (%p)\n",
			    source);

	if (dest_offset & 3)
		IVTVFB_WARN("ivtvfb_prep_frame: Dest offset not 32 bit aligned (%ld)\n", dest_offset);

	if (count & 3)
		IVTVFB_WARN("ivtvfb_prep_frame: Count not a multiple of 4 (%d)\n", count);

	/* Check Source */
	if (!access_ok(VERIFY_READ, source + dest_offset, count)) {
		IVTVFB_WARN("Invalid userspace pointer %p\n", source);

		IVTVFB_DEBUG_WARN("access_ok() failed for offset 0x%08lx source %p count %d\n",
				  dest_offset, source, count);
		return -EINVAL;
	}

	/* OSD Address to send DMA to */
	dest_offset += IVTV_DECODER_OFFSET + oi->video_rbase;

	/* Fill Buffers */
	return ivtvfb_prep_dec_dma_to_device(itv, dest_offset, source, count);
}

static ssize_t ivtvfb_write(struct fb_info *info, const char __user *buf,
						size_t count, loff_t *ppos)
{
	unsigned long p = *ppos;
	void *dst;
	int err = 0;
	int dma_err;
	unsigned long total_size;
	struct ivtv *itv = (struct ivtv *) info->par;
	unsigned long dma_offset =
			IVTV_DECODER_OFFSET + itv->osd_info->video_rbase;
	unsigned long dma_size;
	u16 lead = 0, tail = 0;

	if (info->state != FBINFO_STATE_RUNNING)
		return -EPERM;

	total_size = info->screen_size;

	if (total_size == 0)
		total_size = info->fix.smem_len;

	if (p > total_size)
		return -EFBIG;

	if (count > total_size) {
		err = -EFBIG;
		count = total_size;
	}

	if (count + p > total_size) {
		if (!err)
			err = -ENOSPC;
		count = total_size - p;
	}

	dst = (void __force *) (info->screen_base + p);

	if (info->fbops->fb_sync)
		info->fbops->fb_sync(info);

	/* If transfer size > threshold and both src/dst
	addresses are aligned, use DMA */
	if (count >= 4096 &&
	    ((unsigned long)buf & 3) == ((unsigned long)dst & 3)) {
		/* Odd address = can't DMA. Align */
		if ((unsigned long)dst & 3) {
			lead = 4 - ((unsigned long)dst & 3);
			if (copy_from_user(dst, buf, lead))
				return -EFAULT;
			buf += lead;
			dst += lead;
		}
		/* DMA resolution is 32 bits */
		if ((count - lead) & 3)
			tail = (count - lead) & 3;
		/* DMA the data */
		dma_size = count - lead - tail;
		dma_err = ivtvfb_prep_dec_dma_to_device(itv,
		       p + lead + dma_offset, (void __user *)buf, dma_size);
		if (dma_err)
			return dma_err;
		dst += dma_size;
		buf += dma_size;
		/* Copy any leftover data */
		if (tail && copy_from_user(dst, buf, tail))
			return -EFAULT;
	} else if (copy_from_user(dst, buf, count)) {
		return -EFAULT;
	}

	if  (!err)
		*ppos += count;

	return (err) ? err : count;
}

static int ivtvfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
{
	DEFINE_WAIT(wait);
	struct ivtv *itv = (struct ivtv *)info->par;
	int rc = 0;

	switch (cmd) {
		case FBIOGET_VBLANK: {
			struct fb_vblank vblank;
			u32 trace;

			memset(&vblank, 0, sizeof(struct fb_vblank));

			vblank.flags = FB_VBLANK_HAVE_COUNT |FB_VBLANK_HAVE_VCOUNT |
					FB_VBLANK_HAVE_VSYNC;
			trace = read_reg(IVTV_REG_DEC_LINE_FIELD) >> 16;
			if (itv->is_out_50hz && trace > 312)
				trace -= 312;
			else if (itv->is_out_60hz && trace > 262)
				trace -= 262;
			if (trace == 1)
				vblank.flags |= FB_VBLANK_VSYNCING;
			vblank.count = itv->last_vsync_field;
			vblank.vcount = trace;
			vblank.hcount = 0;
			if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
				return -EFAULT;
			return 0;
		}

		case FBIO_WAITFORVSYNC:
			prepare_to_wait(&itv->vsync_waitq, &wait, TASK_INTERRUPTIBLE);
			if (!schedule_timeout(msecs_to_jiffies(50)))
				rc = -ETIMEDOUT;
			finish_wait(&itv->vsync_waitq, &wait);
			return rc;

		case IVTVFB_IOC_DMA_FRAME: {
			struct ivtvfb_dma_frame args;

			IVTVFB_DEBUG_INFO("IVTVFB_IOC_DMA_FRAME\n");
			if (copy_from_user(&args, (void __user *)arg, sizeof(args)))
				return -EFAULT;

			return ivtvfb_prep_frame(itv, cmd, args.source, args.dest_offset, args.count);
		}

		default:
			IVTVFB_DEBUG_INFO("Unknown ioctl %08x\n", cmd);
			return -EINVAL;
	}
	return 0;
}

/* Framebuffer device handling */

static int ivtvfb_set_var(struct ivtv *itv, struct fb_var_screeninfo *var)
{
	struct osd_info *oi = itv->osd_info;
	struct ivtv_osd_coords ivtv_osd;
	struct v4l2_rect ivtv_window;
	int osd_mode = -1;

	IVTVFB_DEBUG_INFO("ivtvfb_set_var\n");

	/* Select color space */
	if (var->nonstd) /* YUV */
		write_reg(read_reg(0x02a00) | 0x0002000, 0x02a00);
	else /* RGB  */
		write_reg(read_reg(0x02a00) & ~0x0002000, 0x02a00);

	/* Set the color mode */
	switch (var->bits_per_pixel) {
		case 8:
			osd_mode = IVTV_OSD_BPP_8;
			break;
		case 32:
			osd_mode = IVTV_OSD_BPP_32;
			break;
		case 16:
			switch (var->green.length) {
			case 4:
				osd_mode = IVTV_OSD_BPP_16_444;
				break;
			case 5:
				osd_mode = IVTV_OSD_BPP_16_555;
				break;
			case 6:
				osd_mode = IVTV_OSD_BPP_16_565;
				break;
			default:
				IVTVFB_DEBUG_WARN("ivtvfb_set_var - Invalid bpp\n");
			}
			break;
		default:
			IVTVFB_DEBUG_WARN("ivtvfb_set_var - Invalid bpp\n");
	}

	/* Set video mode. Although rare, the display can become scrambled even
	   if we don't change mode. Always 'bounce' to osd_mode via mode 0 */
	if (osd_mode != -1) {
		ivtv_vapi(itv, CX2341X_OSD_SET_PIXEL_FORMAT, 1, 0);
		ivtv_vapi(itv, CX2341X_OSD_SET_PIXEL_FORMAT, 1, osd_mode);
	}

	oi->bits_per_pixel = var->bits_per_pixel;
	oi->bytes_per_pixel = var->bits_per_pixel / 8;

	/* Set the flicker filter */
	switch (var->vmode & FB_VMODE_MASK) {
		case FB_VMODE_NONINTERLACED: /* Filter on */
			ivtv_vapi(itv, CX2341X_OSD_SET_FLICKER_STATE, 1, 1);
			break;
		case FB_VMODE_INTERLACED: /* Filter off */
			ivtv_vapi(itv, CX2341X_OSD_SET_FLICKER_STATE, 1, 0);
			break;
		default:
			IVTVFB_DEBUG_WARN("ivtvfb_set_var - Invalid video mode\n");
	}

	/* Read the current osd info */
	ivtvfb_get_osd_coords(itv, &ivtv_osd);

	/* Now set the OSD to the size we want */
	ivtv_osd.pixel_stride = var->xres_virtual;
	ivtv_osd.lines = var->yres_virtual;
	ivtv_osd.x = 0;
	ivtv_osd.y = 0;
	ivtvfb_set_osd_coords(itv, &ivtv_osd);

	/* Can't seem to find the right API combo for this.
	   Use another function which does what we need through direct register access. */
	ivtv_window.width = var->xres;
	ivtv_window.height = var->yres;

	/* Minimum margin cannot be 0, as X won't allow such a mode */
	if (!var->upper_margin)
		var->upper_margin++;
	if (!var->left_margin)
		var->left_margin++;
	ivtv_window.top = var->upper_margin - 1;
	ivtv_window.left = var->left_margin - 1;

	ivtvfb_set_display_window(itv, &ivtv_window);

	/* Pass screen size back to yuv handler */
	itv->yuv_info.osd_full_w = ivtv_osd.pixel_stride;
	itv->yuv_info.osd_full_h = ivtv_osd.lines;

	/* Force update of yuv registers */
	itv->yuv_info.yuv_forced_update = 1;

	/* Keep a copy of these settings */
	memcpy(&oi->fbvar_cur, var, sizeof(oi->fbvar_cur));

	IVTVFB_DEBUG_INFO("Display size: %dx%d (virtual %dx%d) @ %dbpp\n",
		      var->xres, var->yres,
		      var->xres_virtual, var->yres_virtual,
		      var->bits_per_pixel);

	IVTVFB_DEBUG_INFO("Display position: %d, %d\n",
		      var->left_margin, var->upper_margin);

	IVTVFB_DEBUG_INFO("Display filter: %s\n",
			(var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED ? "on" : "off");
	IVTVFB_DEBUG_INFO("Color space: %s\n", var->nonstd ? "YUV" : "RGB");

	return 0;
}

static int ivtvfb_get_fix(struct ivtv *itv, struct fb_fix_screeninfo *fix)
{
	struct osd_info *oi = itv->osd_info;

	IVTVFB_DEBUG_INFO("ivtvfb_get_fix\n");
	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
	strlcpy(fix->id, "cx23415 TV out", sizeof(fix->id));
	fix->smem_start = oi->video_pbase;
	fix->smem_len = oi->video_buffer_size;
	fix->type = FB_TYPE_PACKED_PIXELS;
	fix->visual = (oi->bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	fix->xpanstep = 1;
	fix->ypanstep = 1;
	fix->ywrapstep = 0;
	fix->line_length = oi->display_byte_stride;
	fix->accel = FB_ACCEL_NONE;
	return 0;
}

/* Check the requested display mode, returning -EINVAL if we can't
   handle it. */

static int _ivtvfb_check_var(struct fb_var_screeninfo *var, struct ivtv *itv)
{
	struct osd_info *oi = itv->osd_info;
	int osd_height_limit;
	u32 pixclock, hlimit, vlimit;

	IVTVFB_DEBUG_INFO("ivtvfb_check_var\n");

	/* Set base references for mode calcs. */
	if (itv->is_out_50hz) {
		pixclock = 84316;
		hlimit = 776;
		vlimit = 591;
		osd_height_limit = 576;
	}
	else {
		pixclock = 83926;
		hlimit = 776;
		vlimit = 495;
		osd_height_limit = 480;
	}

	if (var->bits_per_pixel == 8 || var->bits_per_pixel == 32) {
		var->transp.offset = 24;
		var->transp.length = 8;
		var->red.offset = 16;
		var->red.length = 8;
		var->green.offset = 8;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
	}
	else if (var->bits_per_pixel == 16) {
		/* To find out the true mode, check green length */
		switch (var->green.length) {
			case 4:
				var->red.offset = 8;
				var->red.length = 4;
				var->green.offset = 4;
				var->green.length = 4;
				var->blue.offset = 0;
				var->blue.length = 4;
				var->transp.offset = 12;
				var->transp.length = 1;
				break;
			case 5:
				var->red.offset = 10;
				var->red.length = 5;
				var->green.offset = 5;
				var->green.length = 5;
				var->blue.offset = 0;
				var->blue.length = 5;
				var->transp.offset = 15;
				var->transp.length = 1;
				break;
			default:
				var->red.offset = 11;
				var->red.length = 5;
				var->green.offset = 5;
				var->green.length = 6;
				var->blue.offset = 0;
				var->blue.length = 5;
				var->transp.offset = 0;
				var->transp.length = 0;
				break;
		}
	}
	else {
		IVTVFB_DEBUG_WARN("Invalid colour mode: %d\n", var->bits_per_pixel);
		return -EINVAL;
	}

	/* Check the resolution */
	if (var->xres > IVTV_OSD_MAX_WIDTH || var->yres > osd_height_limit) {
		IVTVFB_DEBUG_WARN("Invalid resolution: %dx%d\n",
				var->xres, var->yres);
		return -EINVAL;
	}

	/* Max horizontal size is 1023 @ 32bpp, 2046 & 16bpp, 4092 @ 8bpp */
	if (var->xres_virtual > 4095 / (var->bits_per_pixel / 8) ||
	    var->xres_virtual * var->yres_virtual * (var->bits_per_pixel / 8) > oi->video_buffer_size ||
	    var->xres_virtual < var->xres ||
	    var->yres_virtual < var->yres) {
		IVTVFB_DEBUG_WARN("Invalid virtual resolution: %dx%d\n",
			var->xres_virtual, var->yres_virtual);
		return -EINVAL;
	}

	/* Some extra checks if in 8 bit mode */
	if (var->bits_per_pixel == 8) {
		/* Width must be a multiple of 4 */
		if (var->xres & 3) {
			IVTVFB_DEBUG_WARN("Invalid resolution for 8bpp: %d\n", var->xres);
			return -EINVAL;
		}
		if (var->xres_virtual & 3) {
			IVTVFB_DEBUG_WARN("Invalid virtual resolution for 8bpp: %d)\n", var->xres_virtual);
			return -EINVAL;
		}
	}
	else if (var->bits_per_pixel == 16) {
		/* Width must be a multiple of 2 */
		if (var->xres & 1) {
			IVTVFB_DEBUG_WARN("Invalid resolution for 16bpp: %d\n", var->xres);
			return -EINVAL;
		}
		if (var->xres_virtual & 1) {
			IVTVFB_DEBUG_WARN("Invalid virtual resolution for 16bpp: %d)\n", var->xres_virtual);
			return -EINVAL;
		}
	}

	/* Now check the offsets */
	if (var->xoffset >= var->xres_virtual || var->yoffset >= var->yres_virtual) {
		IVTVFB_DEBUG_WARN("Invalid offset: %d (%d) %d (%d)\n",
			var->xoffset, var->xres_virtual, var->yoffset, var->yres_virtual);
		return -EINVAL;
	}

	/* Check pixel format */
	if (var->nonstd > 1) {
		IVTVFB_DEBUG_WARN("Invalid nonstd % d\n", var->nonstd);
		return -EINVAL;
	}

	/* Check video mode */
	if (((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED) &&
		((var->vmode & FB_VMODE_MASK) != FB_VMODE_INTERLACED)) {
		IVTVFB_DEBUG_WARN("Invalid video mode: %d\n", var->vmode & FB_VMODE_MASK);
		return -EINVAL;
	}

	/* Check the left & upper margins
	   If the margins are too large, just center the screen
	   (enforcing margins causes too many problems) */

	if (var->left_margin + var->xres > IVTV_OSD_MAX_WIDTH + 1)
		var->left_margin = 1 + ((IVTV_OSD_MAX_WIDTH - var->xres) / 2);

	if (var->upper_margin + var->yres > (itv->is_out_50hz ? 577 : 481))
		var->upper_margin = 1 + (((itv->is_out_50hz ? 576 : 480) -
			var->yres) / 2);

	/* Maintain overall 'size' for a constant refresh rate */
	var->right_margin = hlimit - var->left_margin - var->xres;
	var->lower_margin = vlimit - var->upper_margin - var->yres;

	/* Fixed sync times */
	var->hsync_len = 24;
	var->vsync_len = 2;

	/* Non-interlaced / interlaced mode is used to switch the OSD filter
	   on or off. Adjust the clock timings to maintain a constant
	   vertical refresh rate. */
	if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED)
		var->pixclock = pixclock / 2;
	else
		var->pixclock = pixclock;

	itv->osd_rect.width = var->xres;
	itv->osd_rect.height = var->yres;

	IVTVFB_DEBUG_INFO("Display size: %dx%d (virtual %dx%d) @ %dbpp\n",
		      var->xres, var->yres,
		      var->xres_virtual, var->yres_virtual,
		      var->bits_per_pixel);

	IVTVFB_DEBUG_INFO("Display position: %d, %d\n",
		      var->left_margin, var->upper_margin);

	IVTVFB_DEBUG_INFO("Display filter: %s\n",
			(var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED ? "on" : "off");
	IVTVFB_DEBUG_INFO("Color space: %s\n", var->nonstd ? "YUV" : "RGB");
	return 0;
}

static int ivtvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct ivtv *itv = (struct ivtv *) info->par;
	IVTVFB_DEBUG_INFO("ivtvfb_check_var\n");
	return _ivtvfb_check_var(var, itv);
}

static int ivtvfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	u32 osd_pan_index;
	struct ivtv *itv = (struct ivtv *) info->par;

	if (var->yoffset + info->var.yres > info->var.yres_virtual ||
	    var->xoffset + info->var.xres > info->var.xres_virtual)
		return -EINVAL;

	osd_pan_index = var->yoffset * info->fix.line_length
		      + var->xoffset * info->var.bits_per_pixel / 8;
	write_reg(osd_pan_index, 0x02A0C);

	/* Pass this info back the yuv handler */
	itv->yuv_info.osd_x_pan = var->xoffset;
	itv->yuv_info.osd_y_pan = var->yoffset;
	/* Force update of yuv registers */
	itv->yuv_info.yuv_forced_update = 1;
	/* Remember this value */
	itv->osd_info->pan_cur = osd_pan_index;
	return 0;
}

static int ivtvfb_set_par(struct fb_info *info)
{
	int rc = 0;
	struct ivtv *itv = (struct ivtv *) info->par;

	IVTVFB_DEBUG_INFO("ivtvfb_set_par\n");

	rc = ivtvfb_set_var(itv, &info->var);
	ivtvfb_pan_display(&info->var, info);
	ivtvfb_get_fix(itv, &info->fix);
	ivtv_firmware_check(itv, "ivtvfb_set_par");
	return rc;
}

static int ivtvfb_setcolreg(unsigned regno, unsigned red, unsigned green,
				unsigned blue, unsigned transp,
				struct fb_info *info)
{
	u32 color, *palette;
	struct ivtv *itv = (struct ivtv *)info->par;

	if (regno >= info->cmap.len)
		return -EINVAL;

	color = ((transp & 0xFF00) << 16) |((red & 0xFF00) << 8) | (green & 0xFF00) | ((blue & 0xFF00) >> 8);
	if (info->var.bits_per_pixel <= 8) {
		write_reg(regno, 0x02a30);
		write_reg(color, 0x02a34);
		itv->osd_info->palette_cur[regno] = color;
		return 0;
	}
	if (regno >= 16)
		return -EINVAL;

	palette = info->pseudo_palette;
	if (info->var.bits_per_pixel == 16) {
		switch (info->var.green.length) {
			case 4:
				color = ((red & 0xf000) >> 4) |
					((green & 0xf000) >> 8) |
					((blue & 0xf000) >> 12);
				break;
			case 5:
				color = ((red & 0xf800) >> 1) |
					((green & 0xf800) >> 6) |
					((blue & 0xf800) >> 11);
				break;
			case 6:
				color = (red & 0xf800 ) |
					((green & 0xfc00) >> 5) |
					((blue & 0xf800) >> 11);
				break;
		}
	}
	palette[regno] = color;
	return 0;
}

/* We don't really support blanking. All this does is enable or
   disable the OSD. */
static int ivtvfb_blank(int blank_mode, struct fb_info *info)
{
	struct ivtv *itv = (struct ivtv *)info->par;

	IVTVFB_DEBUG_INFO("Set blanking mode : %d\n", blank_mode);
	switch (blank_mode) {
	case FB_BLANK_UNBLANK:
		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 1);
		ivtv_call_hw(itv, IVTV_HW_SAA7127, video, s_stream, 1);
		break;
	case FB_BLANK_NORMAL:
	case FB_BLANK_HSYNC_SUSPEND:
	case FB_BLANK_VSYNC_SUSPEND:
		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 0);
		ivtv_call_hw(itv, IVTV_HW_SAA7127, video, s_stream, 1);
		break;
	case FB_BLANK_POWERDOWN:
		ivtv_call_hw(itv, IVTV_HW_SAA7127, video, s_stream, 0);
		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 0);
		break;
	}
	itv->osd_info->blank_cur = blank_mode;
	return 0;
}

static struct fb_ops ivtvfb_ops = {
	.owner = THIS_MODULE,
	.fb_write       = ivtvfb_write,
	.fb_check_var   = ivtvfb_check_var,
	.fb_set_par     = ivtvfb_set_par,
	.fb_setcolreg   = ivtvfb_setcolreg,
	.fb_fillrect    = cfb_fillrect,
	.fb_copyarea    = cfb_copyarea,
	.fb_imageblit   = cfb_imageblit,
	.fb_cursor      = NULL,
	.fb_ioctl       = ivtvfb_ioctl,
	.fb_pan_display = ivtvfb_pan_display,
	.fb_blank       = ivtvfb_blank,
};

/* Restore hardware after firmware restart */
static void ivtvfb_restore(struct ivtv *itv)
{
	struct osd_info *oi = itv->osd_info;
	int i;

	ivtvfb_set_var(itv, &oi->fbvar_cur);
	ivtvfb_blank(oi->blank_cur, &oi->ivtvfb_info);
	for (i = 0; i < 256; i++) {
		write_reg(i, 0x02a30);
		write_reg(oi->palette_cur[i], 0x02a34);
	}
	write_reg(oi->pan_cur, 0x02a0c);
}

/* Initialization */


/* Setup our initial video mode */
static int ivtvfb_init_vidmode(struct ivtv *itv)
{
	struct osd_info *oi = itv->osd_info;
	struct v4l2_rect start_window;
	int max_height;

	/* Color mode */

	if (osd_depth != 8 && osd_depth != 16 && osd_depth != 32)
		osd_depth = 8;
	oi->bits_per_pixel = osd_depth;
	oi->bytes_per_pixel = oi->bits_per_pixel / 8;

	/* Horizontal size & position */

	if (osd_xres > 720)
		osd_xres = 720;

	/* Must be a multiple of 4 for 8bpp & 2 for 16bpp */
	if (osd_depth == 8)
		osd_xres &= ~3;
	else if (osd_depth == 16)
		osd_xres &= ~1;

	start_window.width = osd_xres ? osd_xres : 640;

	/* Check horizontal start (osd_left). */
	if (osd_left && osd_left + start_window.width > 721) {
		IVTVFB_ERR("Invalid osd_left - assuming default\n");
		osd_left = 0;
	}

	/* Hardware coords start at 0, user coords start at 1. */
	osd_left--;

	start_window.left = osd_left >= 0 ?
		 osd_left : ((IVTV_OSD_MAX_WIDTH - start_window.width) / 2);

	oi->display_byte_stride =
			start_window.width * oi->bytes_per_pixel;

	/* Vertical size & position */

	max_height = itv->is_out_50hz ? 576 : 480;

	if (osd_yres > max_height)
		osd_yres = max_height;

	start_window.height = osd_yres ?
		osd_yres : itv->is_out_50hz ? 480 : 400;

	/* Check vertical start (osd_upper). */
	if (osd_upper + start_window.height > max_height + 1) {
		IVTVFB_ERR("Invalid osd_upper - assuming default\n");
		osd_upper = 0;
	}

	/* Hardware coords start at 0, user coords start at 1. */
	osd_upper--;

	start_window.top = osd_upper >= 0 ? osd_upper : ((max_height - start_window.height) / 2);

	oi->display_width = start_window.width;
	oi->display_height = start_window.height;

	/* Generate a valid fb_var_screeninfo */

	oi->ivtvfb_defined.xres = oi->display_width;
	oi->ivtvfb_defined.yres = oi->display_height;
	oi->ivtvfb_defined.xres_virtual = oi->display_width;
	oi->ivtvfb_defined.yres_virtual = oi->display_height;
	oi->ivtvfb_defined.bits_per_pixel = oi->bits_per_pixel;
	oi->ivtvfb_defined.vmode = (osd_laced ? FB_VMODE_INTERLACED : FB_VMODE_NONINTERLACED);
	oi->ivtvfb_defined.left_margin = start_window.left + 1;
	oi->ivtvfb_defined.upper_margin = start_window.top + 1;
	oi->ivtvfb_defined.accel_flags = FB_ACCEL_NONE;
	oi->ivtvfb_defined.nonstd = 0;

	/* We've filled in the most data, let the usual mode check
	   routine fill in the rest. */
	_ivtvfb_check_var(&oi->ivtvfb_defined, itv);

	/* Generate valid fb_fix_screeninfo */

	ivtvfb_get_fix(itv, &oi->ivtvfb_fix);

	/* Generate valid fb_info */

	oi->ivtvfb_info.node = -1;
	oi->ivtvfb_info.flags = FBINFO_FLAG_DEFAULT;
	oi->ivtvfb_info.fbops = &ivtvfb_ops;
	oi->ivtvfb_info.par = itv;
	oi->ivtvfb_info.var = oi->ivtvfb_defined;
	oi->ivtvfb_info.fix = oi->ivtvfb_fix;
	oi->ivtvfb_info.screen_base = (u8 __iomem *)oi->video_vbase;
	oi->ivtvfb_info.fbops = &ivtvfb_ops;

	/* Supply some monitor specs. Bogus values will do for now */
	oi->ivtvfb_info.monspecs.hfmin = 8000;
	oi->ivtvfb_info.monspecs.hfmax = 70000;
	oi->ivtvfb_info.monspecs.vfmin = 10;
	oi->ivtvfb_info.monspecs.vfmax = 100;

	/* Allocate color map */
	if (fb_alloc_cmap(&oi->ivtvfb_info.cmap, 256, 1)) {
		IVTVFB_ERR("abort, unable to alloc cmap\n");
		return -ENOMEM;
	}

	/* Allocate the pseudo palette */
	oi->ivtvfb_info.pseudo_palette =
		kmalloc_array(16, sizeof(u32), GFP_KERNEL|__GFP_NOWARN);

	if (!oi->ivtvfb_info.pseudo_palette) {
		IVTVFB_ERR("abort, unable to alloc pseudo palette\n");
		return -ENOMEM;
	}

	return 0;
}

/* Find OSD buffer base & size. Add to mtrr. Zero osd buffer. */

static int ivtvfb_init_io(struct ivtv *itv)
{
	struct osd_info *oi = itv->osd_info;
	/* Find the largest power of two that maps the whole buffer */
	int size_shift = 31;

	mutex_lock(&itv->serialize_lock);
	if (ivtv_init_on_first_open(itv)) {
		mutex_unlock(&itv->serialize_lock);
		IVTVFB_ERR("Failed to initialize ivtv\n");
		return -ENXIO;
	}
	mutex_unlock(&itv->serialize_lock);

	if (ivtvfb_get_framebuffer(itv, &oi->video_rbase,
					&oi->video_buffer_size) < 0) {
		IVTVFB_ERR("Firmware failed to respond\n");
		return -EIO;
	}

	/* The osd buffer size depends on the number of video buffers allocated
	   on the PVR350 itself. For now we'll hardcode the smallest osd buffer
	   size to prevent any overlap. */
	oi->video_buffer_size = 1704960;

	oi->video_pbase = itv->base_addr + IVTV_DECODER_OFFSET + oi->video_rbase;
	oi->video_vbase = itv->dec_mem + oi->video_rbase;

	if (!oi->video_vbase) {
		IVTVFB_ERR("abort, video memory 0x%x @ 0x%lx isn't mapped!\n",
		     oi->video_buffer_size, oi->video_pbase);
		return -EIO;
	}

	IVTVFB_INFO("Framebuffer at 0x%lx, mapped to 0x%p, size %dk\n",
			oi->video_pbase, oi->video_vbase,
			oi->video_buffer_size / 1024);

	while (!(oi->video_buffer_size & (1 << size_shift)))
		size_shift--;
	size_shift++;
	oi->fb_start_aligned_physaddr = oi->video_pbase & ~((1 << size_shift) - 1);
	oi->fb_end_aligned_physaddr = oi->video_pbase + oi->video_buffer_size;
	oi->fb_end_aligned_physaddr += (1 << size_shift) - 1;
	oi->fb_end_aligned_physaddr &= ~((1 << size_shift) - 1);
	oi->wc_cookie = arch_phys_wc_add(oi->fb_start_aligned_physaddr,
					 oi->fb_end_aligned_physaddr -
					 oi->fb_start_aligned_physaddr);
	/* Blank the entire osd. */
	memset_io(oi->video_vbase, 0, oi->video_buffer_size);

	return 0;
}

/* Release any memory we've grabbed & remove mtrr entry */
static void ivtvfb_release_buffers (struct ivtv *itv)
{
	struct osd_info *oi = itv->osd_info;

	/* Release cmap */
	if (oi->ivtvfb_info.cmap.len)
		fb_dealloc_cmap(&oi->ivtvfb_info.cmap);

	/* Release pseudo palette */
	kfree(oi->ivtvfb_info.pseudo_palette);
	arch_phys_wc_del(oi->wc_cookie);
	kfree(oi);
	itv->osd_info = NULL;
}

/* Initialize the specified card */

static int ivtvfb_init_card(struct ivtv *itv)
{
	int rc;

#ifdef CONFIG_X86_64
	if (pat_enabled()) {
		pr_warn("ivtvfb needs PAT disabled, boot with nopat kernel parameter\n");
		return -ENODEV;
	}
#endif

	if (itv->osd_info) {
		IVTVFB_ERR("Card %d already initialised\n", ivtvfb_card_id);
		return -EBUSY;
	}

	itv->osd_info = kzalloc(sizeof(struct osd_info),
					GFP_ATOMIC|__GFP_NOWARN);
	if (itv->osd_info == NULL) {
		IVTVFB_ERR("Failed to allocate memory for osd_info\n");
		return -ENOMEM;
	}

	/* Find & setup the OSD buffer */
	rc = ivtvfb_init_io(itv);
	if (rc) {
		ivtvfb_release_buffers(itv);
		return rc;
	}

	/* Set the startup video mode information */
	if ((rc = ivtvfb_init_vidmode(itv))) {
		ivtvfb_release_buffers(itv);
		return rc;
	}

	/* Register the framebuffer */
	if (register_framebuffer(&itv->osd_info->ivtvfb_info) < 0) {
		ivtvfb_release_buffers(itv);
		return -EINVAL;
	}

	itv->osd_video_pbase = itv->osd_info->video_pbase;

	/* Set the card to the requested mode */
	ivtvfb_set_par(&itv->osd_info->ivtvfb_info);

	/* Set color 0 to black */
	write_reg(0, 0x02a30);
	write_reg(0, 0x02a34);

	/* Enable the osd */
	ivtvfb_blank(FB_BLANK_UNBLANK, &itv->osd_info->ivtvfb_info);

	/* Enable restart */
	itv->ivtvfb_restore = ivtvfb_restore;

	/* Allocate DMA */
	ivtv_udma_alloc(itv);
	return 0;

}

static int __init ivtvfb_callback_init(struct device *dev, void *p)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
	struct ivtv *itv = container_of(v4l2_dev, struct ivtv, v4l2_dev);

	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
		if (ivtvfb_init_card(itv) == 0) {
			IVTVFB_INFO("Framebuffer registered on %s\n",
					itv->v4l2_dev.name);
			(*(int *)p)++;
		}
	}
	return 0;
}

static int ivtvfb_callback_cleanup(struct device *dev, void *p)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
	struct ivtv *itv = container_of(v4l2_dev, struct ivtv, v4l2_dev);
	struct osd_info *oi = itv->osd_info;

	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
		if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
			IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n",
				       itv->instance);
			return 0;
		}
		IVTVFB_INFO("Unregister framebuffer %d\n", itv->instance);
		itv->ivtvfb_restore = NULL;
		ivtvfb_blank(FB_BLANK_VSYNC_SUSPEND, &oi->ivtvfb_info);
		ivtvfb_release_buffers(itv);
		itv->osd_video_pbase = 0;
	}
	return 0;
}

static int __init ivtvfb_init(void)
{
	struct device_driver *drv;
	int registered = 0;
	int err;


	if (ivtvfb_card_id < -1 || ivtvfb_card_id >= IVTV_MAX_CARDS) {
		pr_err("ivtvfb_card_id parameter is out of range (valid range: -1 - %d)\n",
		     IVTV_MAX_CARDS - 1);
		return -EINVAL;
	}

	drv = driver_find("ivtv", &pci_bus_type);
	err = driver_for_each_device(drv, NULL, &registered, ivtvfb_callback_init);
	(void)err;	/* suppress compiler warning */
	if (!registered) {
		pr_err("no cards found\n");
		return -ENODEV;
	}
	return 0;
}

static void ivtvfb_cleanup(void)
{
	struct device_driver *drv;
	int err;

	pr_info("Unloading framebuffer module\n");

	drv = driver_find("ivtv", &pci_bus_type);
	err = driver_for_each_device(drv, NULL, NULL, ivtvfb_callback_cleanup);
	(void)err;	/* suppress compiler warning */
}

module_init(ivtvfb_init);
module_exit(ivtvfb_cleanup);