aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/platform/davinci/vpbe_venc.c
blob: 0302669622d6d6e2b409be2221d4d34f4d25a5e8 (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
/*
 * Copyright (C) 2010 Texas Instruments Inc
 *
 * 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 version 2.
 *
 * 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 <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
#include <linux/slab.h>

#include <mach/hardware.h>
#include <mach/mux.h>
#include <linux/platform_data/i2c-davinci.h>

#include <linux/io.h>

#include <media/davinci/vpbe_types.h>
#include <media/davinci/vpbe_venc.h>
#include <media/davinci/vpss.h>
#include <media/v4l2-device.h>

#include "vpbe_venc_regs.h"

#define MODULE_NAME	VPBE_VENC_SUBDEV_NAME

static int debug = 2;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level 0-2");

struct venc_state {
	struct v4l2_subdev sd;
	struct venc_callback *callback;
	struct venc_platform_data *pdata;
	struct device *pdev;
	u32 output;
	v4l2_std_id std;
	spinlock_t lock;
	void __iomem *venc_base;
	void __iomem *vdaccfg_reg;
};

static inline struct venc_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct venc_state, sd);
}

static inline u32 venc_read(struct v4l2_subdev *sd, u32 offset)
{
	struct venc_state *venc = to_state(sd);

	return readl(venc->venc_base + offset);
}

static inline u32 venc_write(struct v4l2_subdev *sd, u32 offset, u32 val)
{
	struct venc_state *venc = to_state(sd);

	writel(val, (venc->venc_base + offset));

	return val;
}

static inline u32 venc_modify(struct v4l2_subdev *sd, u32 offset,
				 u32 val, u32 mask)
{
	u32 new_val = (venc_read(sd, offset) & ~mask) | (val & mask);

	venc_write(sd, offset, new_val);

	return new_val;
}

static inline u32 vdaccfg_write(struct v4l2_subdev *sd, u32 val)
{
	struct venc_state *venc = to_state(sd);

	writel(val, venc->vdaccfg_reg);

	val = readl(venc->vdaccfg_reg);

	return val;
}

#define VDAC_COMPONENT	0x543
#define VDAC_S_VIDEO	0x210
/* This function sets the dac of the VPBE for various outputs
 */
static int venc_set_dac(struct v4l2_subdev *sd, u32 out_index)
{
	switch (out_index) {
	case 0:
		v4l2_dbg(debug, 1, sd, "Setting output to Composite\n");
		venc_write(sd, VENC_DACSEL, 0);
		break;
	case 1:
		v4l2_dbg(debug, 1, sd, "Setting output to Component\n");
		venc_write(sd, VENC_DACSEL, VDAC_COMPONENT);
		break;
	case 2:
		v4l2_dbg(debug, 1, sd, "Setting output to S-video\n");
		venc_write(sd, VENC_DACSEL, VDAC_S_VIDEO);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static void venc_enabledigitaloutput(struct v4l2_subdev *sd, int benable)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;
	v4l2_dbg(debug, 2, sd, "venc_enabledigitaloutput\n");

	if (benable) {
		venc_write(sd, VENC_VMOD, 0);
		venc_write(sd, VENC_CVBS, 0);
		venc_write(sd, VENC_LCDOUT, 0);
		venc_write(sd, VENC_HSPLS, 0);
		venc_write(sd, VENC_HSTART, 0);
		venc_write(sd, VENC_HVALID, 0);
		venc_write(sd, VENC_HINT, 0);
		venc_write(sd, VENC_VSPLS, 0);
		venc_write(sd, VENC_VSTART, 0);
		venc_write(sd, VENC_VVALID, 0);
		venc_write(sd, VENC_VINT, 0);
		venc_write(sd, VENC_YCCCTL, 0);
		venc_write(sd, VENC_DACSEL, 0);

	} else {
		venc_write(sd, VENC_VMOD, 0);
		/* disable VCLK output pin enable */
		venc_write(sd, VENC_VIDCTL, 0x141);

		/* Disable output sync pins */
		venc_write(sd, VENC_SYNCCTL, 0);

		/* Disable DCLOCK */
		venc_write(sd, VENC_DCLKCTL, 0);
		venc_write(sd, VENC_DRGBX1, 0x0000057C);

		/* Disable LCD output control (accepting default polarity) */
		venc_write(sd, VENC_LCDOUT, 0);
		if (pdata->venc_type != VPBE_VERSION_3)
			venc_write(sd, VENC_CMPNT, 0x100);
		venc_write(sd, VENC_HSPLS, 0);
		venc_write(sd, VENC_HINT, 0);
		venc_write(sd, VENC_HSTART, 0);
		venc_write(sd, VENC_HVALID, 0);

		venc_write(sd, VENC_VSPLS, 0);
		venc_write(sd, VENC_VINT, 0);
		venc_write(sd, VENC_VSTART, 0);
		venc_write(sd, VENC_VVALID, 0);

		venc_write(sd, VENC_HSDLY, 0);
		venc_write(sd, VENC_VSDLY, 0);

		venc_write(sd, VENC_YCCCTL, 0);
		venc_write(sd, VENC_VSTARTA, 0);

		/* Set OSD clock and OSD Sync Adavance registers */
		venc_write(sd, VENC_OSDCLK0, 1);
		venc_write(sd, VENC_OSDCLK1, 2);
	}
}

#define VDAC_CONFIG_SD_V3	0x0E21A6B6
#define VDAC_CONFIG_SD_V2	0x081141CF
/*
 * setting NTSC mode
 */
static int venc_set_ntsc(struct v4l2_subdev *sd)
{
	u32 val;
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_ntsc\n");

	/* Setup clock at VPSS & VENC for SD */
	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
	if (pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_525_60) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_3) {
		venc_write(sd, VENC_CLKCTL, 0x01);
		venc_write(sd, VENC_VIDCTL, 0);
		val = vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
	} else if (pdata->venc_type == VPBE_VERSION_2) {
		venc_write(sd, VENC_CLKCTL, 0x01);
		venc_write(sd, VENC_VIDCTL, 0);
		vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
	} else {
		/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
		venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
		/* Set REC656 Mode */
		venc_write(sd, VENC_YCCCTL, 0x1);
		venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAFRQ);
		venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
			VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_TVTYP_SHIFT),
			VENC_VMOD_TVTYP);
	venc_write(sd, VENC_DACTST, 0x0);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
}

/*
 * setting PAL mode
 */
static int venc_set_pal(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_pal\n");

	/* Setup clock at VPSS & VENC for SD */
	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
	if (venc->pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_625_50) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_3) {
		venc_write(sd, VENC_CLKCTL, 0x1);
		venc_write(sd, VENC_VIDCTL, 0);
		vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
	} else if (pdata->venc_type == VPBE_VERSION_2) {
		venc_write(sd, VENC_CLKCTL, 0x1);
		venc_write(sd, VENC_VIDCTL, 0);
		vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
	} else {
		/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
		venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
		/* Set REC656 Mode */
		venc_write(sd, VENC_YCCCTL, 0x1);
	}

	venc_modify(sd, VENC_SYNCCTL, 1 << VENC_SYNCCTL_OVD_SHIFT,
			VENC_SYNCCTL_OVD);
	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD,
			(1 << VENC_VMOD_VIE_SHIFT),
			VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD,
			(0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
	venc_modify(sd, VENC_VMOD,
			(1 << VENC_VMOD_TVTYP_SHIFT),
			VENC_VMOD_TVTYP);
	venc_write(sd, VENC_DACTST, 0x0);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
}

#define VDAC_CONFIG_HD_V2	0x081141EF
/*
 * venc_set_480p59_94
 *
 * This function configures the video encoder to EDTV(525p) component setting.
 */
static int venc_set_480p59_94(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_480p59_94\n");
	if ((pdata->venc_type != VPBE_VERSION_1) &&
	    (pdata->venc_type != VPBE_VERSION_2))
		return -EINVAL;

	/* Setup clock at VPSS & VENC for SD */
	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_480P59_94) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_2)
		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	if (pdata->venc_type == VPBE_VERSION_1) {
		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
			    VENC_VDPRO_DAFRQ);
		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
			    VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
		    VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_525P << VENC_VMOD_TVTYP_SHIFT),
		    VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
		    VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);

	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
}

/*
 * venc_set_625p
 *
 * This function configures the video encoder to HDTV(625p) component setting
 */
static int venc_set_576p50(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_576p50\n");

	if ((pdata->venc_type != VPBE_VERSION_1) &&
	  (pdata->venc_type != VPBE_VERSION_2))
		return -EINVAL;
	/* Setup clock at VPSS & VENC for SD */
	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_576P50) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_2)
		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	if (pdata->venc_type == VPBE_VERSION_1) {
		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
			    VENC_VDPRO_DAFRQ);
		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
			    VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
		    VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_625P << VENC_VMOD_TVTYP_SHIFT),
		    VENC_VMOD_TVTYP);

	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
		    VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
}

/*
 * venc_set_720p60_internal - Setup 720p60 in venc for dm365 only
 */
static int venc_set_720p60_internal(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_720P60) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	venc_write(sd, VENC_VMOD, 0);
	/* DM365 component HD mode */
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	    VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_720P << VENC_VMOD_TVTYP_SHIFT),
		    VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
	venc_write(sd, VENC_XHINTVL, 0);
	return 0;
}

/*
 * venc_set_1080i30_internal - Setup 1080i30 in venc for dm365 only
 */
static int venc_set_1080i30_internal(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_1080P30) < 0)
		return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);


	venc_write(sd, VENC_VMOD, 0);
	/* DM365 component HD mode */
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
		    VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_1080I << VENC_VMOD_TVTYP_SHIFT),
		    VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
	venc_write(sd, VENC_XHINTVL, 0);
	return 0;
}

static int venc_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
{
	v4l2_dbg(debug, 1, sd, "venc_s_std_output\n");

	if (norm & V4L2_STD_525_60)
		return venc_set_ntsc(sd);
	else if (norm & V4L2_STD_625_50)
		return venc_set_pal(sd);

	return -EINVAL;
}

static int venc_s_dv_preset(struct v4l2_subdev *sd,
			    struct v4l2_dv_preset *dv_preset)
{
	struct venc_state *venc = to_state(sd);
	int ret;

	v4l2_dbg(debug, 1, sd, "venc_s_dv_preset\n");

	if (dv_preset->preset == V4L2_DV_576P50)
		return venc_set_576p50(sd);
	else if (dv_preset->preset == V4L2_DV_480P59_94)
		return venc_set_480p59_94(sd);
	else if ((dv_preset->preset == V4L2_DV_720P60) &&
			(venc->pdata->venc_type == VPBE_VERSION_2)) {
		/* TBD setup internal 720p mode here */
		ret = venc_set_720p60_internal(sd);
		/* for DM365 VPBE, there is DAC inside */
		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
		return ret;
	} else if ((dv_preset->preset == V4L2_DV_1080I30) &&
		(venc->pdata->venc_type == VPBE_VERSION_2)) {
		/* TBD setup internal 1080i mode here */
		ret = venc_set_1080i30_internal(sd);
		/* for DM365 VPBE, there is DAC inside */
		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
		return ret;
	}
	return -EINVAL;
}

static int venc_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
			  u32 config)
{
	struct venc_state *venc = to_state(sd);
	int ret;

	v4l2_dbg(debug, 1, sd, "venc_s_routing\n");

	ret = venc_set_dac(sd, output);
	if (!ret)
		venc->output = output;

	return ret;
}

static long venc_ioctl(struct v4l2_subdev *sd,
			unsigned int cmd,
			void *arg)
{
	u32 val;

	switch (cmd) {
	case VENC_GET_FLD:
		val = venc_read(sd, VENC_VSTAT);
		*((int *)arg) = ((val & VENC_VSTAT_FIDST) ==
		VENC_VSTAT_FIDST);
		break;
	default:
		v4l2_err(sd, "Wrong IOCTL cmd\n");
		break;
	}

	return 0;
}

static const struct v4l2_subdev_core_ops venc_core_ops = {
	.ioctl      = venc_ioctl,
};

static const struct v4l2_subdev_video_ops venc_video_ops = {
	.s_routing = venc_s_routing,
	.s_std_output = venc_s_std_output,
	.s_dv_preset = venc_s_dv_preset,
};

static const struct v4l2_subdev_ops venc_ops = {
	.core = &venc_core_ops,
	.video = &venc_video_ops,
};

static int venc_initialize(struct v4l2_subdev *sd)
{
	struct venc_state *venc = to_state(sd);
	int ret;

	/* Set default to output to composite and std to NTSC */
	venc->output = 0;
	venc->std = V4L2_STD_525_60;

	ret = venc_s_routing(sd, 0, venc->output, 0);
	if (ret < 0) {
		v4l2_err(sd, "Error setting output during init\n");
		return -EINVAL;
	}

	ret = venc_s_std_output(sd, venc->std);
	if (ret < 0) {
		v4l2_err(sd, "Error setting std during init\n");
		return -EINVAL;
	}

	return ret;
}

static int venc_device_get(struct device *dev, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct venc_state **venc = data;

	if (strcmp(MODULE_NAME, pdev->name) == 0)
		*venc = platform_get_drvdata(pdev);

	return 0;
}

struct v4l2_subdev *venc_sub_dev_init(struct v4l2_device *v4l2_dev,
		const char *venc_name)
{
	struct venc_state *venc;
	int err;

	err = bus_for_each_dev(&platform_bus_type, NULL, &venc,
			venc_device_get);
	if (venc == NULL)
		return NULL;

	v4l2_subdev_init(&venc->sd, &venc_ops);

	strcpy(venc->sd.name, venc_name);
	if (v4l2_device_register_subdev(v4l2_dev, &venc->sd) < 0) {
		v4l2_err(v4l2_dev,
			"vpbe unable to register venc sub device\n");
		return NULL;
	}
	if (venc_initialize(&venc->sd)) {
		v4l2_err(v4l2_dev,
			"vpbe venc initialization failed\n");
		return NULL;
	}

	return &venc->sd;
}
EXPORT_SYMBOL(venc_sub_dev_init);

static int venc_probe(struct platform_device *pdev)
{
	struct venc_state *venc;
	struct resource *res;
	int ret;

	venc = kzalloc(sizeof(struct venc_state), GFP_KERNEL);
	if (venc == NULL)
		return -ENOMEM;

	venc->pdev = &pdev->dev;
	venc->pdata = pdev->dev.platform_data;
	if (NULL == venc->pdata) {
		dev_err(venc->pdev, "Unable to get platform data for"
			" VENC sub device");
		ret = -ENOENT;
		goto free_mem;
	}
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(venc->pdev,
			"Unable to get VENC register address map\n");
		ret = -ENODEV;
		goto free_mem;
	}

	if (!request_mem_region(res->start, resource_size(res), "venc")) {
		dev_err(venc->pdev, "Unable to reserve VENC MMIO region\n");
		ret = -ENODEV;
		goto free_mem;
	}

	venc->venc_base = ioremap_nocache(res->start, resource_size(res));
	if (!venc->venc_base) {
		dev_err(venc->pdev, "Unable to map VENC IO space\n");
		ret = -ENODEV;
		goto release_venc_mem_region;
	}

	if (venc->pdata->venc_type != VPBE_VERSION_1) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
		if (!res) {
			dev_err(venc->pdev,
				"Unable to get VDAC_CONFIG address map\n");
			ret = -ENODEV;
			goto unmap_venc_io;
		}

		if (!request_mem_region(res->start,
					resource_size(res), "venc")) {
			dev_err(venc->pdev,
				"Unable to reserve VDAC_CONFIG  MMIO region\n");
			ret = -ENODEV;
			goto unmap_venc_io;
		}

		venc->vdaccfg_reg = ioremap_nocache(res->start,
						    resource_size(res));
		if (!venc->vdaccfg_reg) {
			dev_err(venc->pdev,
				"Unable to map VDAC_CONFIG IO space\n");
			ret = -ENODEV;
			goto release_vdaccfg_mem_region;
		}
	}
	spin_lock_init(&venc->lock);
	platform_set_drvdata(pdev, venc);
	dev_notice(venc->pdev, "VENC sub device probe success\n");
	return 0;

release_vdaccfg_mem_region:
	release_mem_region(res->start, resource_size(res));
unmap_venc_io:
	iounmap(venc->venc_base);
release_venc_mem_region:
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, resource_size(res));
free_mem:
	kfree(venc);
	return ret;
}

static int venc_remove(struct platform_device *pdev)
{
	struct venc_state *venc = platform_get_drvdata(pdev);
	struct resource *res;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	iounmap((void *)venc->venc_base);
	release_mem_region(res->start, resource_size(res));
	if (venc->pdata->venc_type != VPBE_VERSION_1) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
		iounmap((void *)venc->vdaccfg_reg);
		release_mem_region(res->start, resource_size(res));
	}
	kfree(venc);

	return 0;
}

static struct platform_driver venc_driver = {
	.probe		= venc_probe,
	.remove		= venc_remove,
	.driver		= {
		.name	= MODULE_NAME,
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(venc_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("VPBE VENC Driver");
MODULE_AUTHOR("Texas Instruments");