aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx231xx/cx231xx-core.c
blob: 912a4d7402068743486ea3f327b672fe8eecdc2b (plain) (blame)
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
/*
   cx231xx-core.c - driver for Conexant Cx23100/101/102
				USB video capture devices

   Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
				Based on em28xx driver

   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/vmalloc.h>
#include <media/v4l2-common.h>

#include "cx231xx.h"
#include "cx231xx-reg.h"

/* #define ENABLE_DEBUG_ISOC_FRAMES */

static unsigned int core_debug;
module_param(core_debug, int, 0644);
MODULE_PARM_DESC(core_debug, "enable debug messages [core]");

#define cx231xx_coredbg(fmt, arg...) do {\
	if (core_debug) \
		printk(KERN_INFO "%s %s :"fmt, \
			 dev->name, __func__ , ##arg); } while (0)

static unsigned int reg_debug;
module_param(reg_debug, int, 0644);
MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");

#define cx231xx_regdbg(fmt, arg...) do {\
	if (reg_debug) \
		printk(KERN_INFO "%s %s :"fmt, \
			 dev->name, __func__ , ##arg); } while (0)

static int alt = CX231XX_PINOUT;
module_param(alt, int, 0644);
MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");

#define cx231xx_isocdbg(fmt, arg...) do {\
	if (core_debug) \
		printk(KERN_INFO "%s %s :"fmt, \
			 dev->name, __func__ , ##arg); } while (0)

/*****************************************************************
*             Device control list functions     				 *
******************************************************************/

static LIST_HEAD(cx231xx_devlist);
static DEFINE_MUTEX(cx231xx_devlist_mutex);

/*
 * cx231xx_realease_resources()
 * unregisters the v4l2,i2c and usb devices
 * called when the device gets disconected or at module unload
*/
void cx231xx_remove_from_devlist(struct cx231xx *dev)
{
	mutex_lock(&cx231xx_devlist_mutex);
	list_del(&dev->devlist);
	mutex_unlock(&cx231xx_devlist_mutex);
};

void cx231xx_add_into_devlist(struct cx231xx *dev)
{
	mutex_lock(&cx231xx_devlist_mutex);
	list_add_tail(&dev->devlist, &cx231xx_devlist);
	mutex_unlock(&cx231xx_devlist_mutex);
};

static LIST_HEAD(cx231xx_extension_devlist);
static DEFINE_MUTEX(cx231xx_extension_devlist_lock);

int cx231xx_register_extension(struct cx231xx_ops *ops)
{
	struct cx231xx *dev = NULL;

	mutex_lock(&cx231xx_devlist_mutex);
	mutex_lock(&cx231xx_extension_devlist_lock);
	list_add_tail(&ops->next, &cx231xx_extension_devlist);
	list_for_each_entry(dev, &cx231xx_devlist, devlist)
		ops->init(dev);

	printk(KERN_INFO DRIVER_NAME ": %s initialized\n", ops->name);
	mutex_unlock(&cx231xx_extension_devlist_lock);
	mutex_unlock(&cx231xx_devlist_mutex);
	return 0;
}
EXPORT_SYMBOL(cx231xx_register_extension);

void cx231xx_unregister_extension(struct cx231xx_ops *ops)
{
	struct cx231xx *dev = NULL;

	mutex_lock(&cx231xx_devlist_mutex);
	list_for_each_entry(dev, &cx231xx_devlist, devlist)
		ops->fini(dev);

	mutex_lock(&cx231xx_extension_devlist_lock);
	printk(KERN_INFO DRIVER_NAME ": %s removed\n", ops->name);
	list_del(&ops->next);
	mutex_unlock(&cx231xx_extension_devlist_lock);
	mutex_unlock(&cx231xx_devlist_mutex);
}
EXPORT_SYMBOL(cx231xx_unregister_extension);

void cx231xx_init_extension(struct cx231xx *dev)
{
	struct cx231xx_ops *ops = NULL;

	mutex_lock(&cx231xx_extension_devlist_lock);
	if (!list_empty(&cx231xx_extension_devlist)) {
		list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
			if (ops->init)
				ops->init(dev);
		}
	}
	mutex_unlock(&cx231xx_extension_devlist_lock);
}

void cx231xx_close_extension(struct cx231xx *dev)
{
	struct cx231xx_ops *ops = NULL;

	mutex_lock(&cx231xx_extension_devlist_lock);
	if (!list_empty(&cx231xx_extension_devlist)) {
		list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
			if (ops->fini)
				ops->fini(dev);
		}
	}
	mutex_unlock(&cx231xx_extension_devlist_lock);
}

/****************************************************************
*               U S B related functions                         *
*****************************************************************/
int cx231xx_send_usb_command(struct cx231xx_i2c *i2c_bus,
			     struct cx231xx_i2c_xfer_data *req_data)
{
	int status = 0;
	struct cx231xx *dev = i2c_bus->dev;
	struct VENDOR_REQUEST_IN ven_req;

	u8 saddr_len = 0;
	u8 _i2c_period = 0;
	u8 _i2c_nostop = 0;
	u8 _i2c_reserve = 0;

	/* Get the I2C period, nostop and reserve parameters */
	_i2c_period = i2c_bus->i2c_period;
	_i2c_nostop = i2c_bus->i2c_nostop;
	_i2c_reserve = i2c_bus->i2c_reserve;

	saddr_len = req_data->saddr_len;

	/* Set wValue */
	if (saddr_len == 1)	/* need check saddr_len == 0  */
		ven_req.wValue =
		    req_data->
		    dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
		    _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;
	else
		ven_req.wValue =
		    req_data->
		    dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
		    _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;

	/* set channel number */
	if (req_data->direction & I2C_M_RD) {
		/* channel number, for read,spec required channel_num +4 */
		ven_req.bRequest = i2c_bus->nr + 4;
	} else
		ven_req.bRequest = i2c_bus->nr;	/* channel number,  */

	/* set index value */
	switch (saddr_len) {
	case 0:
		ven_req.wIndex = 0;	/* need check */
		break;
	case 1:
		ven_req.wIndex = (req_data->saddr_dat & 0xff);
		break;
	case 2:
		ven_req.wIndex = req_data->saddr_dat;
		break;
	}

	/* set wLength value */
	ven_req.wLength = req_data->buf_size;

	/* set bData value */
	ven_req.bData = 0;

	/* set the direction */
	if (req_data->direction) {
		ven_req.direction = USB_DIR_IN;
		memset(req_data->p_buffer, 0x00, ven_req.wLength);
	} else
		ven_req.direction = USB_DIR_OUT;

	/* set the buffer for read / write */
	ven_req.pBuff = req_data->p_buffer;


	/* call common vendor command request */
	status = cx231xx_send_vendor_cmd(dev, &ven_req);
	if (status < 0) {
		cx231xx_info
		    ("UsbInterface::sendCommand, failed with status -%d\n",
		     status);
	}

	return status;
}
EXPORT_SYMBOL_GPL(cx231xx_send_usb_command);

/*
 * cx231xx_read_ctrl_reg()
 * reads data from the usb device specifying bRequest and wValue
 */
int cx231xx_read_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg,
			  char *buf, int len)
{
	u8 val = 0;
	int ret;
	int pipe = usb_rcvctrlpipe(dev->udev, 0);

	if (dev->state & DEV_DISCONNECTED)
		return -ENODEV;

	if (len > URB_MAX_CTRL_SIZE)
		return -EINVAL;

	switch (len) {
	case 1:
		val = ENABLE_ONE_BYTE;
		break;
	case 2:
		val = ENABLE_TWE_BYTE;
		break;
	case 3:
		val = ENABLE_THREE_BYTE;
		break;
	case 4:
		val = ENABLE_FOUR_BYTE;
		break;
	default:
		val = 0xFF;	/* invalid option */
	}

	if (val == 0xFF)
		return -EINVAL;

	if (reg_debug) {
		cx231xx_isocdbg("(pipe 0x%08x): "
				"IN:  %02x %02x %02x %02x %02x %02x %02x %02x ",
				pipe,
				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				req, 0, val,
				reg & 0xff, reg >> 8, len & 0xff, len >> 8);
	}

	mutex_lock(&dev->ctrl_urb_lock);
	ret = usb_control_msg(dev->udev, pipe, req,
			      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			      val, reg, dev->urb_buf, len, HZ);
	if (ret < 0) {
		cx231xx_isocdbg(" failed!\n");
		/* mutex_unlock(&dev->ctrl_urb_lock); */
		return ret;
	}

	if (len)
		memcpy(buf, dev->urb_buf, len);

	mutex_unlock(&dev->ctrl_urb_lock);

	if (reg_debug) {
		int byte;

		cx231xx_isocdbg("<<<");
		for (byte = 0; byte < len; byte++)
			cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
		cx231xx_isocdbg("\n");
	}

	return ret;
}

int cx231xx_send_vendor_cmd(struct cx231xx *dev,
				struct VENDOR_REQUEST_IN *ven_req)
{
	int ret;
	int pipe = 0;

	if (dev->state & DEV_DISCONNECTED)
		return -ENODEV;

	if ((ven_req->wLength > URB_MAX_CTRL_SIZE))
		return -EINVAL;

	if (ven_req->direction)
		pipe = usb_rcvctrlpipe(dev->udev, 0);
	else
		pipe = usb_sndctrlpipe(dev->udev, 0);

	if (reg_debug) {
		int byte;

		cx231xx_isocdbg("(pipe 0x%08x): "
				"OUT: %02x %02x %02x %04x %04x %04x >>>",
				pipe,
				ven_req->
				direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				ven_req->bRequest, 0, ven_req->wValue,
				ven_req->wIndex, ven_req->wLength);

		for (byte = 0; byte < ven_req->wLength; byte++)
			cx231xx_isocdbg(" %02x",
					(unsigned char)ven_req->pBuff[byte]);
		cx231xx_isocdbg("\n");
	}

	mutex_lock(&dev->ctrl_urb_lock);
	ret = usb_control_msg(dev->udev, pipe, ven_req->bRequest,
			      ven_req->
			      direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			      ven_req->wValue, ven_req->wIndex, ven_req->pBuff,
			      ven_req->wLength, HZ);
	mutex_unlock(&dev->ctrl_urb_lock);

	return ret;
}

/*
 * cx231xx_write_ctrl_reg()
 * sends data to the usb device, specifying bRequest
 */
int cx231xx_write_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg, char *buf,
			   int len)
{
	u8 val = 0;
	int ret;
	int pipe = usb_sndctrlpipe(dev->udev, 0);

	if (dev->state & DEV_DISCONNECTED)
		return -ENODEV;

	if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
		return -EINVAL;

	switch (len) {
	case 1:
		val = ENABLE_ONE_BYTE;
		break;
	case 2:
		val = ENABLE_TWE_BYTE;
		break;
	case 3:
		val = ENABLE_THREE_BYTE;
		break;
	case 4:
		val = ENABLE_FOUR_BYTE;
		break;
	default:
		val = 0xFF;	/* invalid option */
	}

	if (val == 0xFF)
		return -EINVAL;

	if (reg_debug) {
		int byte;

		cx231xx_isocdbg("(pipe 0x%08x): "
			"OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
			pipe,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			req, 0, val, reg & 0xff,
			reg >> 8, len & 0xff, len >> 8);

		for (byte = 0; byte < len; byte++)
			cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
		cx231xx_isocdbg("\n");
	}

	mutex_lock(&dev->ctrl_urb_lock);
	memcpy(dev->urb_buf, buf, len);
	ret = usb_control_msg(dev->udev, pipe, req,
			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			      val, reg, dev->urb_buf, len, HZ);
	mutex_unlock(&dev->ctrl_urb_lock);

	return ret;
}

/****************************************************************
*           USB Alternate Setting functions                     *
*****************************************************************/

int cx231xx_set_video_alternate(struct cx231xx *dev)
{
	int errCode, prev_alt = dev->video_mode.alt;
	unsigned int min_pkt_size = dev->width * 2 + 4;
	u32 usb_interface_index = 0;

	/* When image size is bigger than a certain value,
	   the frame size should be increased, otherwise, only
	   green screen will be received.
	 */
	if (dev->width * 2 * dev->height > 720 * 240 * 2)
		min_pkt_size *= 2;

	if (dev->width > 360) {
		/* resolutions: 720,704,640 */
		dev->video_mode.alt = 3;
	} else if (dev->width > 180) {
		/* resolutions: 360,352,320,240 */
		dev->video_mode.alt = 2;
	} else if (dev->width > 0) {
		/* resolutions: 180,176,160,128,88 */
		dev->video_mode.alt = 1;
	} else {
		/* Change to alt0 BULK to release USB bandwidth */
		dev->video_mode.alt = 0;
	}

	/* Get the correct video interface Index */
	usb_interface_index =
	    dev->current_pcb_config.hs_config_info[0].interface_info.
	    video_index + 1;

	if (dev->video_mode.alt != prev_alt) {
		cx231xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
				min_pkt_size, dev->video_mode.alt);
		dev->video_mode.max_pkt_size =
		    dev->video_mode.alt_max_pkt_size[dev->video_mode.alt];
		cx231xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
				dev->video_mode.alt,
				dev->video_mode.max_pkt_size);
		cx231xx_info
		    (" setting alt %d with wMaxPktSize=%u , Interface = %d\n",
		     dev->video_mode.alt, dev->video_mode.max_pkt_size,
		     usb_interface_index);
		errCode =
		    usb_set_interface(dev->udev, usb_interface_index,
				      dev->video_mode.alt);
		if (errCode < 0) {
			cx231xx_errdev
			    ("cannot change alt number to %d (error=%i)\n",
			     dev->video_mode.alt, errCode);
			return errCode;
		}
	}
	return 0;
}

int cx231xx_set_alt_setting(struct cx231xx *dev, u8 index, u8 alt)
{
	int status = 0;
	u32 usb_interface_index = 0;
	u32 max_pkt_size = 0;

	switch (index) {
	case INDEX_TS1:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    ts1_index + 1;
		dev->video_mode.alt = alt;
		if (dev->ts1_mode.alt_max_pkt_size != NULL)
			max_pkt_size = dev->ts1_mode.max_pkt_size =
			    dev->ts1_mode.alt_max_pkt_size[dev->ts1_mode.alt];
		break;
	case INDEX_TS2:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    ts2_index + 1;
		break;
	case INDEX_AUDIO:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    audio_index + 1;
		dev->adev.alt = alt;
		if (dev->adev.alt_max_pkt_size != NULL)
			max_pkt_size = dev->adev.max_pkt_size =
			    dev->adev.alt_max_pkt_size[dev->adev.alt];
		break;
	case INDEX_VIDEO:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    video_index + 1;
		dev->video_mode.alt = alt;
		if (dev->video_mode.alt_max_pkt_size != NULL)
			max_pkt_size = dev->video_mode.max_pkt_size =
			    dev->video_mode.alt_max_pkt_size[dev->video_mode.
							     alt];
		break;
	case INDEX_VANC:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    vanc_index + 1;
		dev->vbi_mode.alt = alt;
		if (dev->vbi_mode.alt_max_pkt_size != NULL)
			max_pkt_size = dev->vbi_mode.max_pkt_size =
			    dev->vbi_mode.alt_max_pkt_size[dev->vbi_mode.alt];
		break;
	case INDEX_HANC:
		usb_interface_index =
		    dev->current_pcb_config.hs_config_info[0].interface_info.
		    hanc_index + 1;
		dev->sliced_cc_mode.alt = alt;
		if (dev->sliced_cc_mode.alt_max_pkt_size != NULL)
			max_pkt_size = dev->sliced_cc_mode.max_pkt_size =
			    dev->sliced_cc_mode.alt_max_pkt_size[dev->
								 sliced_cc_mode.
								 alt];
		break;
	default:
		break;
	}

	if (alt > 0 && max_pkt_size == 0) {
		cx231xx_errdev
		("can't change interface %d alt no. to %d: Max. Pkt size = 0\n",
		usb_interface_index, alt);
		return -1;
	}

	cx231xx_info
	    (" setting alternate %d with wMaxPacketSize=%u , Interface = %d\n",
	     alt, max_pkt_size, usb_interface_index);

	if (usb_interface_index > 0) {
		status = usb_set_interface(dev->udev, usb_interface_index, alt);
		if (status < 0) {
			cx231xx_errdev
			("can't change interface %d alt no. to %d (err=%i)\n",
			usb_interface_index, alt, status);
			return status;
		}
	}

	return status;
}
EXPORT_SYMBOL_GPL(cx231xx_set_alt_setting);

int cx231xx_gpio_set(struct cx231xx *dev, struct cx231xx_reg_seq *gpio)
{
	int rc = 0;

	if (!gpio)
		return rc;

	/* Send GPIO reset sequences specified at board entry */
	while (gpio->sleep >= 0) {
		rc = cx231xx_set_gpio_value(dev, gpio->bit, gpio->val);
		if (rc < 0)
			return rc;

		if (gpio->sleep > 0)
			msleep(gpio->sleep);

		gpio++;
	}
	return rc;
}

int cx231xx_set_mode(struct cx231xx *dev, enum cx231xx_mode set_mode)
{
	if (dev->mode == set_mode)
		return 0;

	if (set_mode == CX231XX_SUSPEND) {
		/* Set the chip in power saving mode */
		dev->mode = set_mode;
	}

	/* Resource is locked */
	if (dev->mode != CX231XX_SUSPEND)
		return -EINVAL;

	dev->mode = set_mode;

	if (dev->mode == CX231XX_DIGITAL_MODE)
		;/* Set Digital power mode */
	else
		;/* Set Analog Power mode */

	return 0;
}
EXPORT_SYMBOL_GPL(cx231xx_set_mode);

/*****************************************************************
*                URB Streaming functions                         *
******************************************************************/

/*
 * IRQ callback, called by URB callback
 */
static void cx231xx_irq_callback(struct urb *urb)
{
	struct cx231xx_dmaqueue *dma_q = urb->context;
	struct cx231xx_video_mode *vmode =
	    container_of(dma_q, struct cx231xx_video_mode, vidq);
	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
	int rc, i;

	switch (urb->status) {
	case 0:		/* success */
	case -ETIMEDOUT:	/* NAK */
		break;
	case -ECONNRESET:	/* kill */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	default:		/* error */
		cx231xx_isocdbg("urb completition error %d.\n", urb->status);
		break;
	}

	/* Copy data from URB */
	spin_lock(&dev->video_mode.slock);
	rc = dev->video_mode.isoc_ctl.isoc_copy(dev, urb);
	spin_unlock(&dev->video_mode.slock);

	/* Reset urb buffers */
	for (i = 0; i < urb->number_of_packets; i++) {
		urb->iso_frame_desc[i].status = 0;
		urb->iso_frame_desc[i].actual_length = 0;
	}
	urb->status = 0;

	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
	if (urb->status) {
		cx231xx_isocdbg("urb resubmit failed (error=%i)\n",
				urb->status);
	}
}

/*
 * Stop and Deallocate URBs
 */
void cx231xx_uninit_isoc(struct cx231xx *dev)
{
	struct urb *urb;
	int i;

	cx231xx_isocdbg("cx231xx: called cx231xx_uninit_isoc\n");

	dev->video_mode.isoc_ctl.nfields = -1;
	for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
		urb = dev->video_mode.isoc_ctl.urb[i];
		if (urb) {
			if (!irqs_disabled())
				usb_kill_urb(urb);
			else
				usb_unlink_urb(urb);

			if (dev->video_mode.isoc_ctl.transfer_buffer[i]) {
				usb_free_coherent(dev->udev,
						  urb->transfer_buffer_length,
						  dev->video_mode.isoc_ctl.
						  transfer_buffer[i],
						  urb->transfer_dma);
			}
			usb_free_urb(urb);
			dev->video_mode.isoc_ctl.urb[i] = NULL;
		}
		dev->video_mode.isoc_ctl.transfer_buffer[i] = NULL;
	}

	kfree(dev->video_mode.isoc_ctl.urb);
	kfree(dev->video_mode.isoc_ctl.transfer_buffer);

	dev->video_mode.isoc_ctl.urb = NULL;
	dev->video_mode.isoc_ctl.transfer_buffer = NULL;
	dev->video_mode.isoc_ctl.num_bufs = 0;

	cx231xx_capture_start(dev, 0, Raw_Video);
}
EXPORT_SYMBOL_GPL(cx231xx_uninit_isoc);

/*
 * Allocate URBs and start IRQ
 */
int cx231xx_init_isoc(struct cx231xx *dev, int max_packets,
		      int num_bufs, int max_pkt_size,
		      int (*isoc_copy) (struct cx231xx *dev, struct urb *urb))
{
	struct cx231xx_dmaqueue *dma_q = &dev->video_mode.vidq;
	int i;
	int sb_size, pipe;
	struct urb *urb;
	int j, k;
	int rc;

	cx231xx_isocdbg("cx231xx: called cx231xx_prepare_isoc\n");

	dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;

	cx231xx_info("Setting Video mux to %d\n", dev->video_input);
	video_mux(dev, dev->video_input);

	/* De-allocates all pending stuff */
	cx231xx_uninit_isoc(dev);

	dev->video_mode.isoc_ctl.isoc_copy = isoc_copy;
	dev->video_mode.isoc_ctl.num_bufs = num_bufs;
	dma_q->pos = 0;
	dma_q->is_partial_line = 0;
	dma_q->last_sav = 0;
	dma_q->current_field = -1;
	dma_q->field1_done = 0;
	dma_q->lines_per_field = dev->height / 2;
	dma_q->bytes_left_in_line = dev->width << 1;
	dma_q->lines_completed = 0;
	for (i = 0; i < 8; i++)
		dma_q->partial_buf[i] = 0;

	dev->video_mode.isoc_ctl.urb =
	    kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
	if (!dev->video_mode.isoc_ctl.urb) {
		cx231xx_errdev("cannot alloc memory for usb buffers\n");
		return -ENOMEM;
	}

	dev->video_mode.isoc_ctl.transfer_buffer =
	    kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
	if (!dev->video_mode.isoc_ctl.transfer_buffer) {
		cx231xx_errdev("cannot allocate memory for usbtransfer\n");
		kfree(dev->video_mode.isoc_ctl.urb);
		return -ENOMEM;
	}

	dev->video_mode.isoc_ctl.max_pkt_size = max_pkt_size;
	dev->video_mode.isoc_ctl.buf = NULL;

	sb_size = max_packets * dev->video_mode.isoc_ctl.max_pkt_size;

	/* allocate urbs and transfer buffers */
	for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
		urb = usb_alloc_urb(max_packets, GFP_KERNEL);
		if (!urb) {
			cx231xx_err("cannot alloc isoc_ctl.urb %i\n", i);
			cx231xx_uninit_isoc(dev);
			return -ENOMEM;
		}
		dev->video_mode.isoc_ctl.urb[i] = urb;

		dev->video_mode.isoc_ctl.transfer_buffer[i] =
		    usb_alloc_coherent(dev->udev, sb_size, GFP_KERNEL,
				       &urb->transfer_dma);
		if (!dev->video_mode.isoc_ctl.transfer_buffer[i]) {
			cx231xx_err("unable to allocate %i bytes for transfer"
				    " buffer %i%s\n",
				    sb_size, i,
				    in_interrupt() ? " while in int" : "");
			cx231xx_uninit_isoc(dev);
			return -ENOMEM;
		}
		memset(dev->video_mode.isoc_ctl.transfer_buffer[i], 0, sb_size);

		pipe =
		    usb_rcvisocpipe(dev->udev, dev->video_mode.end_point_addr);

		usb_fill_int_urb(urb, dev->udev, pipe,
				 dev->video_mode.isoc_ctl.transfer_buffer[i],
				 sb_size, cx231xx_irq_callback, dma_q, 1);

		urb->number_of_packets = max_packets;
		urb->transfer_flags = URB_ISO_ASAP;

		k = 0;
		for (j = 0; j < max_packets; j++) {
			urb->iso_frame_desc[j].offset = k;
			urb->iso_frame_desc[j].length =
			    dev->video_mode.isoc_ctl.max_pkt_size;
			k += dev->video_mode.isoc_ctl.max_pkt_size;
		}
	}

	init_waitqueue_head(&dma_q->wq);

	/* submit urbs and enables IRQ */
	for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
		rc = usb_submit_urb(dev->video_mode.isoc_ctl.urb[i],
				    GFP_ATOMIC);
		if (rc) {
			cx231xx_err("submit of urb %i failed (error=%i)\n", i,
				    rc);
			cx231xx_uninit_isoc(dev);
			return rc;
		}
	}

	cx231xx_capture_start(dev, 1, Raw_Video);

	return 0;
}
EXPORT_SYMBOL_GPL(cx231xx_init_isoc);

/*****************************************************************
*             Device Init/UnInit functions                       *
******************************************************************/
int cx231xx_dev_init(struct cx231xx *dev)
{
	int errCode = 0;

	/* Initialize I2C bus */

	/* External Master 1 Bus */
	dev->i2c_bus[0].nr = 0;
	dev->i2c_bus[0].dev = dev;
	dev->i2c_bus[0].i2c_period = I2C_SPEED_1M;	/* 1MHz */
	dev->i2c_bus[0].i2c_nostop = 0;
	dev->i2c_bus[0].i2c_reserve = 0;

	/* External Master 2 Bus */
	dev->i2c_bus[1].nr = 1;
	dev->i2c_bus[1].dev = dev;
	dev->i2c_bus[1].i2c_period = I2C_SPEED_1M;	/* 1MHz */
	dev->i2c_bus[1].i2c_nostop = 0;
	dev->i2c_bus[1].i2c_reserve = 0;

	/* Internal Master 3 Bus */
	dev->i2c_bus[2].nr = 2;
	dev->i2c_bus[2].dev = dev;
	dev->i2c_bus[2].i2c_period = I2C_SPEED_400K;	/* 400kHz */
	dev->i2c_bus[2].i2c_nostop = 0;
	dev->i2c_bus[2].i2c_reserve = 0;

	/* register I2C buses */
	cx231xx_i2c_register(&dev->i2c_bus[0]);
	cx231xx_i2c_register(&dev->i2c_bus[1]);
	cx231xx_i2c_register(&dev->i2c_bus[2]);

	/* init hardware */
	/* Note : with out calling set power mode function,
	afe can not be set up correctly */
	errCode = cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: Failed to set Power - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}

	/* initialize Colibri block */
	errCode = cx231xx_afe_init_super_block(dev, 0x23c);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: cx231xx_afe init super block - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}
	errCode = cx231xx_afe_init_channels(dev);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: cx231xx_afe init channels - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}

	/* Set DIF in By pass mode */
	errCode = cx231xx_dif_set_standard(dev, DIF_USE_BASEBAND);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: cx231xx_dif set to By pass mode - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}

	/* I2S block related functions */
	errCode = cx231xx_i2s_blk_initialize(dev);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: cx231xx_i2s block initialize - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}

	/* init control pins */
	errCode = cx231xx_init_ctrl_pin_status(dev);
	if (errCode < 0) {
		cx231xx_errdev("%s: cx231xx_init ctrl pins - errCode [%d]!\n",
			       __func__, errCode);
		return errCode;
	}

	/* set AGC mode to Analog */
	errCode = cx231xx_set_agc_analog_digital_mux_select(dev, 1);
	if (errCode < 0) {
		cx231xx_errdev
		    ("%s: cx231xx_AGC mode to Analog - errCode [%d]!\n",
		     __func__, errCode);
		return errCode;
	}

	/* set all alternate settings to zero initially */
	cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
	cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
	cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
	if (dev->board.has_dvb)
		cx231xx_set_alt_setting(dev, INDEX_TS1, 0);

	/* set the I2C master port to 3 on channel 1 */
	errCode = cx231xx_enable_i2c_for_tuner(dev, I2C_3);

	return errCode;
}
EXPORT_SYMBOL_GPL(cx231xx_dev_init);

void cx231xx_dev_uninit(struct cx231xx *dev)
{
	/* Un Initialize I2C bus */
	cx231xx_i2c_unregister(&dev->i2c_bus[2]);
	cx231xx_i2c_unregister(&dev->i2c_bus[1]);
	cx231xx_i2c_unregister(&dev->i2c_bus[0]);
}
EXPORT_SYMBOL_GPL(cx231xx_dev_uninit);

/*****************************************************************
*              G P I O related functions                         *
******************************************************************/
int cx231xx_send_gpio_cmd(struct cx231xx *dev, u32 gpio_bit, u8 * gpio_val,
			  u8 len, u8 request, u8 direction)
{
	int status = 0;
	struct VENDOR_REQUEST_IN ven_req;

	/* Set wValue */
	ven_req.wValue = (u16) (gpio_bit >> 16 & 0xffff);

	/* set request */
	if (!request) {
		if (direction)
			ven_req.bRequest = VRT_GET_GPIO;	/* 0x8 gpio */
		else
			ven_req.bRequest = VRT_SET_GPIO;	/* 0x9 gpio */
	} else {
		if (direction)
			ven_req.bRequest = VRT_GET_GPIE;	/* 0xa gpie */
		else
			ven_req.bRequest = VRT_SET_GPIE;	/* 0xb gpie */
	}

	/* set index value */
	ven_req.wIndex = (u16) (gpio_bit & 0xffff);

	/* set wLength value */
	ven_req.wLength = len;

	/* set bData value */
	ven_req.bData = 0;

	/* set the buffer for read / write */
	ven_req.pBuff = gpio_val;

	/* set the direction */
	if (direction) {
		ven_req.direction = USB_DIR_IN;
		memset(ven_req.pBuff, 0x00, ven_req.wLength);
	} else
		ven_req.direction = USB_DIR_OUT;


	/* call common vendor command request */
	status = cx231xx_send_vendor_cmd(dev, &ven_req);
	if (status < 0) {
		cx231xx_info
		    ("UsbInterface::sendCommand, failed with status -%d\n",
		     status);
	}

	return status;
}
EXPORT_SYMBOL_GPL(cx231xx_send_gpio_cmd);

/*****************************************************************
 *    C O N T R O L - Register R E A D / W R I T E functions     *
 *****************************************************************/
int cx231xx_mode_register(struct cx231xx *dev, u16 address, u32 mode)
{
	u8 value[4] = { 0x0, 0x0, 0x0, 0x0 };
	u32 tmp = 0;
	int status = 0;

	status =
	    cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER, address, value, 4);
	if (status < 0)
		return status;

	tmp = *((u32 *) value);
	tmp |= mode;

	value[0] = (u8) tmp;
	value[1] = (u8) (tmp >> 8);
	value[2] = (u8) (tmp >> 16);
	value[3] = (u8) (tmp >> 24);

	status =
	    cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER, address, value, 4);

	return status;
}

/*****************************************************************
 *            I 2 C Internal C O N T R O L   functions           *
 *****************************************************************/
int cx231xx_read_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
			  u8 saddr_len, u32 *data, u8 data_len)
{
	int status = 0;
	struct cx231xx_i2c_xfer_data req_data;
	u8 value[4] = { 0, 0, 0, 0 };

	if (saddr_len == 0)
		saddr = 0;
	else if (saddr_len == 0)
		saddr &= 0xff;

	/* prepare xfer_data struct */
	req_data.dev_addr = dev_addr >> 1;
	req_data.direction = I2C_M_RD;
	req_data.saddr_len = saddr_len;
	req_data.saddr_dat = saddr;
	req_data.buf_size = data_len;
	req_data.p_buffer = (u8 *) value;

	/* usb send command */
	status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);

	if (status >= 0) {
		/* Copy the data read back to main buffer */
		if (data_len == 1)
			*data = value[0];
		else
			*data =
			    value[0] | value[1] << 8 | value[2] << 16 | value[3]
			    << 24;
	}

	return status;
}

int cx231xx_write_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
			   u8 saddr_len, u32 data, u8 data_len)
{
	int status = 0;
	u8 value[4] = { 0, 0, 0, 0 };
	struct cx231xx_i2c_xfer_data req_data;

	value[0] = (u8) data;
	value[1] = (u8) (data >> 8);
	value[2] = (u8) (data >> 16);
	value[3] = (u8) (data >> 24);

	if (saddr_len == 0)
		saddr = 0;
	else if (saddr_len == 0)
		saddr &= 0xff;

	/* prepare xfer_data struct */
	req_data.dev_addr = dev_addr >> 1;
	req_data.direction = 0;
	req_data.saddr_len = saddr_len;
	req_data.saddr_dat = saddr;
	req_data.buf_size = data_len;
	req_data.p_buffer = value;

	/* usb send command */
	status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);

	return status;
}

int cx231xx_reg_mask_write(struct cx231xx *dev, u8 dev_addr, u8 size,
			   u16 register_address, u8 bit_start, u8 bit_end,
			   u32 value)
{
	int status = 0;
	u32 tmp;
	u32 mask = 0;
	int i;

	if (bit_start > (size - 1) || bit_end > (size - 1))
		return -1;

	if (size == 8) {
		status =
		    cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
					  &tmp, 1);
	} else {
		status =
		    cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
					  &tmp, 4);
	}

	if (status < 0)
		return status;

	mask = 1 << bit_end;
	for (i = bit_end; i > bit_start && i > 0; i--)
		mask = mask + (1 << (i - 1));

	value <<= bit_start;

	if (size == 8) {
		tmp &= ~mask;
		tmp |= value;
		tmp &= 0xff;
		status =
		    cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
					   tmp, 1);
	} else {
		tmp &= ~mask;
		tmp |= value;
		status =
		    cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
					   tmp, 4);
	}

	return status;
}

int cx231xx_read_modify_write_i2c_dword(struct cx231xx *dev, u8 dev_addr,
					u16 saddr, u32 mask, u32 value)
{
	u32 temp;
	int status = 0;

	status = cx231xx_read_i2c_data(dev, dev_addr, saddr, 2, &temp, 4);

	if (status < 0)
		return status;

	temp &= ~mask;
	temp |= value;

	status = cx231xx_write_i2c_data(dev, dev_addr, saddr, 2, temp, 4);

	return status;
}

u32 cx231xx_set_field(u32 field_mask, u32 data)
{
	u32 temp;

	for (temp = field_mask; (temp & 1) == 0; temp >>= 1)
		data <<= 1;

	return data;
}