1/*
2 * Copyright (C) 2008-2009 Texas Instruments Inc
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17 *
18 * Driver name : VPFE Capture driver
19 *    VPFE Capture driver allows applications to capture and stream video
20 *    frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
21 *    TVP5146 or  Raw Bayer RGB image data from an image sensor
22 *    such as Microns' MT9T001, MT9T031 etc.
23 *
24 *    These SoCs have, in common, a Video Processing Subsystem (VPSS) that
25 *    consists of a Video Processing Front End (VPFE) for capturing
26 *    video/raw image data and Video Processing Back End (VPBE) for displaying
27 *    YUV data through an in-built analog encoder or Digital LCD port. This
28 *    driver is for capture through VPFE. A typical EVM using these SoCs have
29 *    following high level configuration.
30 *
31 *
32 *    decoder(TVP5146/		YUV/
33 * 	     MT9T001)   -->  Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
34 *    				data input              |      |
35 *							V      |
36 *						      SDRAM    |
37 *							       V
38 *							   Image Processor
39 *							       |
40 *							       V
41 *							     SDRAM
42 *    The data flow happens from a decoder connected to the VPFE over a
43 *    YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
44 *    and to the input of VPFE through an optional MUX (if more inputs are
45 *    to be interfaced on the EVM). The input data is first passed through
46 *    CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
47 *    does very little or no processing on YUV data and does pre-process Raw
48 *    Bayer RGB data through modules such as Defect Pixel Correction (DFC)
49 *    Color Space Conversion (CSC), data gain/offset etc. After this, data
50 *    can be written to SDRAM or can be connected to the image processing
51 *    block such as IPIPE (on DM355 only).
52 *
53 *    Features supported
54 *  		- MMAP IO
55 *		- Capture using TVP5146 over BT.656
56 *		- support for interfacing decoders using sub device model
57 *		- Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
58 *		  data capture to SDRAM.
59 *    TODO list
60 *		- Support multiple REQBUF after open
61 *		- Support for de-allocating buffers through REQBUF
62 *		- Support for Raw Bayer RGB capture
63 *		- Support for chaining Image Processor
64 *		- Support for static allocation of buffers
65 *		- Support for USERPTR IO
66 *		- Support for STREAMON before QBUF
67 *		- Support for control ioctls
68 */
69#include <linux/module.h>
70#include <linux/slab.h>
71#include <linux/init.h>
72#include <linux/platform_device.h>
73#include <linux/interrupt.h>
74#include <media/v4l2-common.h>
75#include <linux/io.h>
76#include <media/davinci/vpfe_capture.h>
77#include "ccdc_hw_device.h"
78
79static int debug;
80static u32 numbuffers = 3;
81static u32 bufsize = (720 * 576 * 2);
82
83module_param(numbuffers, uint, S_IRUGO);
84module_param(bufsize, uint, S_IRUGO);
85module_param(debug, int, 0644);
86
87MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
88MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
89MODULE_PARM_DESC(debug, "Debug level 0-1");
90
91MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
92MODULE_LICENSE("GPL");
93MODULE_AUTHOR("Texas Instruments");
94
95/* standard information */
96struct vpfe_standard {
97	v4l2_std_id std_id;
98	unsigned int width;
99	unsigned int height;
100	struct v4l2_fract pixelaspect;
101	/* 0 - progressive, 1 - interlaced */
102	int frame_format;
103};
104
105/* ccdc configuration */
106struct ccdc_config {
107	/* This make sure vpfe is probed and ready to go */
108	int vpfe_probed;
109	/* name of ccdc device */
110	char name[32];
111};
112
113/* data structures */
114static struct vpfe_config_params config_params = {
115	.min_numbuffers = 3,
116	.numbuffers = 3,
117	.min_bufsize = 720 * 480 * 2,
118	.device_bufsize = 720 * 576 * 2,
119};
120
121/* ccdc device registered */
122static struct ccdc_hw_device *ccdc_dev;
123/* lock for accessing ccdc information */
124static DEFINE_MUTEX(ccdc_lock);
125/* ccdc configuration */
126static struct ccdc_config *ccdc_cfg;
127
128static const struct vpfe_standard vpfe_standards[] = {
129	{V4L2_STD_525_60, 720, 480, {11, 10}, 1},
130	{V4L2_STD_625_50, 720, 576, {54, 59}, 1},
131};
132
133/* Used when raw Bayer image from ccdc is directly captured to SDRAM */
134static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
135	{
136		.fmtdesc = {
137			.index = 0,
138			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
139			.description = "Bayer GrRBGb 8bit A-Law compr.",
140			.pixelformat = V4L2_PIX_FMT_SBGGR8,
141		},
142		.bpp = 1,
143	},
144	{
145		.fmtdesc = {
146			.index = 1,
147			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
148			.description = "Bayer GrRBGb - 16bit",
149			.pixelformat = V4L2_PIX_FMT_SBGGR16,
150		},
151		.bpp = 2,
152	},
153	{
154		.fmtdesc = {
155			.index = 2,
156			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
157			.description = "Bayer GrRBGb 8bit DPCM compr.",
158			.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
159		},
160		.bpp = 1,
161	},
162	{
163		.fmtdesc = {
164			.index = 3,
165			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
166			.description = "YCbCr 4:2:2 Interleaved UYVY",
167			.pixelformat = V4L2_PIX_FMT_UYVY,
168		},
169		.bpp = 2,
170	},
171	{
172		.fmtdesc = {
173			.index = 4,
174			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
175			.description = "YCbCr 4:2:2 Interleaved YUYV",
176			.pixelformat = V4L2_PIX_FMT_YUYV,
177		},
178		.bpp = 2,
179	},
180	{
181		.fmtdesc = {
182			.index = 5,
183			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
184			.description = "Y/CbCr 4:2:0 - Semi planar",
185			.pixelformat = V4L2_PIX_FMT_NV12,
186		},
187		.bpp = 1,
188	},
189};
190
191/*
192 * vpfe_lookup_pix_format()
193 * lookup an entry in the vpfe pix format table based on pix_format
194 */
195static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
196{
197	int i;
198
199	for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
200		if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
201			return &vpfe_pix_fmts[i];
202	}
203	return NULL;
204}
205
206/*
207 * vpfe_register_ccdc_device. CCDC module calls this to
208 * register with vpfe capture
209 */
210int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
211{
212	int ret = 0;
213	printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
214
215	BUG_ON(!dev->hw_ops.open);
216	BUG_ON(!dev->hw_ops.enable);
217	BUG_ON(!dev->hw_ops.set_hw_if_params);
218	BUG_ON(!dev->hw_ops.configure);
219	BUG_ON(!dev->hw_ops.set_buftype);
220	BUG_ON(!dev->hw_ops.get_buftype);
221	BUG_ON(!dev->hw_ops.enum_pix);
222	BUG_ON(!dev->hw_ops.set_frame_format);
223	BUG_ON(!dev->hw_ops.get_frame_format);
224	BUG_ON(!dev->hw_ops.get_pixel_format);
225	BUG_ON(!dev->hw_ops.set_pixel_format);
226	BUG_ON(!dev->hw_ops.set_image_window);
227	BUG_ON(!dev->hw_ops.get_image_window);
228	BUG_ON(!dev->hw_ops.get_line_length);
229	BUG_ON(!dev->hw_ops.getfid);
230
231	mutex_lock(&ccdc_lock);
232	if (NULL == ccdc_cfg) {
233		/*
234		 * TODO. Will this ever happen? if so, we need to fix it.
235		 * Proabably we need to add the request to a linked list and
236		 * walk through it during vpfe probe
237		 */
238		printk(KERN_ERR "vpfe capture not initialized\n");
239		ret = -EFAULT;
240		goto unlock;
241	}
242
243	if (strcmp(dev->name, ccdc_cfg->name)) {
244		/* ignore this ccdc */
245		ret = -EINVAL;
246		goto unlock;
247	}
248
249	if (ccdc_dev) {
250		printk(KERN_ERR "ccdc already registered\n");
251		ret = -EINVAL;
252		goto unlock;
253	}
254
255	ccdc_dev = dev;
256unlock:
257	mutex_unlock(&ccdc_lock);
258	return ret;
259}
260EXPORT_SYMBOL(vpfe_register_ccdc_device);
261
262/*
263 * vpfe_unregister_ccdc_device. CCDC module calls this to
264 * unregister with vpfe capture
265 */
266void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
267{
268	if (NULL == dev) {
269		printk(KERN_ERR "invalid ccdc device ptr\n");
270		return;
271	}
272
273	printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
274		dev->name);
275
276	if (strcmp(dev->name, ccdc_cfg->name)) {
277		/* ignore this ccdc */
278		return;
279	}
280
281	mutex_lock(&ccdc_lock);
282	ccdc_dev = NULL;
283	mutex_unlock(&ccdc_lock);
284	return;
285}
286EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
287
288/*
289 * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
290 */
291static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
292				 struct v4l2_format *f)
293{
294	struct v4l2_rect image_win;
295	enum ccdc_buftype buf_type;
296	enum ccdc_frmfmt frm_fmt;
297
298	memset(f, 0, sizeof(*f));
299	f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
300	ccdc_dev->hw_ops.get_image_window(&image_win);
301	f->fmt.pix.width = image_win.width;
302	f->fmt.pix.height = image_win.height;
303	f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
304	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
305				f->fmt.pix.height;
306	buf_type = ccdc_dev->hw_ops.get_buftype();
307	f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
308	frm_fmt = ccdc_dev->hw_ops.get_frame_format();
309	if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
310		f->fmt.pix.field = V4L2_FIELD_NONE;
311	else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
312		if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
313			f->fmt.pix.field = V4L2_FIELD_INTERLACED;
314		else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
315			f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
316		else {
317			v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
318			return -EINVAL;
319		}
320	} else {
321		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
322		return -EINVAL;
323	}
324	return 0;
325}
326
327/*
328 * vpfe_config_ccdc_image_format()
329 * For a pix format, configure ccdc to setup the capture
330 */
331static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
332{
333	enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
334	int ret = 0;
335
336	if (ccdc_dev->hw_ops.set_pixel_format(
337			vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
338		v4l2_err(&vpfe_dev->v4l2_dev,
339			"couldn't set pix format in ccdc\n");
340		return -EINVAL;
341	}
342	/* configure the image window */
343	ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
344
345	switch (vpfe_dev->fmt.fmt.pix.field) {
346	case V4L2_FIELD_INTERLACED:
347		/* do nothing, since it is default */
348		ret = ccdc_dev->hw_ops.set_buftype(
349				CCDC_BUFTYPE_FLD_INTERLEAVED);
350		break;
351	case V4L2_FIELD_NONE:
352		frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
353		/* buffer type only applicable for interlaced scan */
354		break;
355	case V4L2_FIELD_SEQ_TB:
356		ret = ccdc_dev->hw_ops.set_buftype(
357				CCDC_BUFTYPE_FLD_SEPARATED);
358		break;
359	default:
360		return -EINVAL;
361	}
362
363	/* set the frame format */
364	if (!ret)
365		ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
366	return ret;
367}
368/*
369 * vpfe_config_image_format()
370 * For a given standard, this functions sets up the default
371 * pix format & crop values in the vpfe device and ccdc.  It first
372 * starts with defaults based values from the standard table.
373 * It then checks if sub device support g_mbus_fmt and then override the
374 * values based on that.Sets crop values to match with scan resolution
375 * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
376 * values in ccdc
377 */
378static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
379				    v4l2_std_id std_id)
380{
381	struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
382	struct v4l2_mbus_framefmt mbus_fmt;
383	struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
384	int i, ret = 0;
385
386	for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
387		if (vpfe_standards[i].std_id & std_id) {
388			vpfe_dev->std_info.active_pixels =
389					vpfe_standards[i].width;
390			vpfe_dev->std_info.active_lines =
391					vpfe_standards[i].height;
392			vpfe_dev->std_info.frame_format =
393					vpfe_standards[i].frame_format;
394			vpfe_dev->std_index = i;
395			break;
396		}
397	}
398
399	if (i ==  ARRAY_SIZE(vpfe_standards)) {
400		v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
401		return -EINVAL;
402	}
403
404	vpfe_dev->crop.top = 0;
405	vpfe_dev->crop.left = 0;
406	vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
407	vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
408	pix->width = vpfe_dev->crop.width;
409	pix->height = vpfe_dev->crop.height;
410
411	/* first field and frame format based on standard frame format */
412	if (vpfe_dev->std_info.frame_format) {
413		pix->field = V4L2_FIELD_INTERLACED;
414		/* assume V4L2_PIX_FMT_UYVY as default */
415		pix->pixelformat = V4L2_PIX_FMT_UYVY;
416		v4l2_fill_mbus_format(&mbus_fmt, pix,
417				MEDIA_BUS_FMT_YUYV10_2X10);
418	} else {
419		pix->field = V4L2_FIELD_NONE;
420		/* assume V4L2_PIX_FMT_SBGGR8 */
421		pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
422		v4l2_fill_mbus_format(&mbus_fmt, pix,
423				MEDIA_BUS_FMT_SBGGR8_1X8);
424	}
425
426	/* if sub device supports g_mbus_fmt, override the defaults */
427	ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
428			sdinfo->grp_id, video, g_mbus_fmt, &mbus_fmt);
429
430	if (ret && ret != -ENOIOCTLCMD) {
431		v4l2_err(&vpfe_dev->v4l2_dev,
432			"error in getting g_mbus_fmt from sub device\n");
433		return ret;
434	}
435	v4l2_fill_pix_format(pix, &mbus_fmt);
436	pix->bytesperline = pix->width * 2;
437	pix->sizeimage = pix->bytesperline * pix->height;
438
439	/* Sets the values in CCDC */
440	ret = vpfe_config_ccdc_image_format(vpfe_dev);
441	if (ret)
442		return ret;
443
444	/* Update the values of sizeimage and bytesperline */
445	pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
446	pix->sizeimage = pix->bytesperline * pix->height;
447
448	return 0;
449}
450
451static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
452{
453	int ret = 0;
454
455	/* set first input of current subdevice as the current input */
456	vpfe_dev->current_input = 0;
457
458	/* set default standard */
459	vpfe_dev->std_index = 0;
460
461	/* Configure the default format information */
462	ret = vpfe_config_image_format(vpfe_dev,
463				vpfe_standards[vpfe_dev->std_index].std_id);
464	if (ret)
465		return ret;
466
467	/* now open the ccdc device to initialize it */
468	mutex_lock(&ccdc_lock);
469	if (NULL == ccdc_dev) {
470		v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
471		ret = -ENODEV;
472		goto unlock;
473	}
474
475	if (!try_module_get(ccdc_dev->owner)) {
476		v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
477		ret = -ENODEV;
478		goto unlock;
479	}
480	ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
481	if (!ret)
482		vpfe_dev->initialized = 1;
483
484	/* Clear all VPFE/CCDC interrupts */
485	if (vpfe_dev->cfg->clr_intr)
486		vpfe_dev->cfg->clr_intr(-1);
487
488unlock:
489	mutex_unlock(&ccdc_lock);
490	return ret;
491}
492
493/*
494 * vpfe_open : It creates object of file handle structure and
495 * stores it in private_data  member of filepointer
496 */
497static int vpfe_open(struct file *file)
498{
499	struct vpfe_device *vpfe_dev = video_drvdata(file);
500	struct video_device *vdev = video_devdata(file);
501	struct vpfe_fh *fh;
502
503	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
504
505	if (!vpfe_dev->cfg->num_subdevs) {
506		v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
507		return -ENODEV;
508	}
509
510	/* Allocate memory for the file handle object */
511	fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
512	if (NULL == fh) {
513		v4l2_err(&vpfe_dev->v4l2_dev,
514			"unable to allocate memory for file handle object\n");
515		return -ENOMEM;
516	}
517	/* store pointer to fh in private_data member of file */
518	file->private_data = fh;
519	fh->vpfe_dev = vpfe_dev;
520	v4l2_fh_init(&fh->fh, vdev);
521	mutex_lock(&vpfe_dev->lock);
522	/* If decoder is not initialized. initialize it */
523	if (!vpfe_dev->initialized) {
524		if (vpfe_initialize_device(vpfe_dev)) {
525			mutex_unlock(&vpfe_dev->lock);
526			return -ENODEV;
527		}
528	}
529	/* Increment device usrs counter */
530	vpfe_dev->usrs++;
531	/* Set io_allowed member to false */
532	fh->io_allowed = 0;
533	v4l2_fh_add(&fh->fh);
534	mutex_unlock(&vpfe_dev->lock);
535	return 0;
536}
537
538static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
539{
540	unsigned long addr;
541
542	vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
543					struct videobuf_buffer, queue);
544	list_del(&vpfe_dev->next_frm->queue);
545	vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
546	addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
547
548	ccdc_dev->hw_ops.setfbaddr(addr);
549}
550
551static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
552{
553	unsigned long addr;
554
555	addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
556	addr += vpfe_dev->field_off;
557	ccdc_dev->hw_ops.setfbaddr(addr);
558}
559
560static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
561{
562	v4l2_get_timestamp(&vpfe_dev->cur_frm->ts);
563	vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
564	vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
565	wake_up_interruptible(&vpfe_dev->cur_frm->done);
566	vpfe_dev->cur_frm = vpfe_dev->next_frm;
567}
568
569/* ISR for VINT0*/
570static irqreturn_t vpfe_isr(int irq, void *dev_id)
571{
572	struct vpfe_device *vpfe_dev = dev_id;
573	enum v4l2_field field;
574	int fid;
575
576	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
577	field = vpfe_dev->fmt.fmt.pix.field;
578
579	/* if streaming not started, don't do anything */
580	if (!vpfe_dev->started)
581		goto clear_intr;
582
583	/* only for 6446 this will be applicable */
584	if (NULL != ccdc_dev->hw_ops.reset)
585		ccdc_dev->hw_ops.reset();
586
587	if (field == V4L2_FIELD_NONE) {
588		/* handle progressive frame capture */
589		v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
590			"frame format is progressive...\n");
591		if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
592			vpfe_process_buffer_complete(vpfe_dev);
593		goto clear_intr;
594	}
595
596	/* interlaced or TB capture check which field we are in hardware */
597	fid = ccdc_dev->hw_ops.getfid();
598
599	/* switch the software maintained field id */
600	vpfe_dev->field_id ^= 1;
601	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
602		fid, vpfe_dev->field_id);
603	if (fid == vpfe_dev->field_id) {
604		/* we are in-sync here,continue */
605		if (fid == 0) {
606			/*
607			 * One frame is just being captured. If the next frame
608			 * is available, release the current frame and move on
609			 */
610			if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
611				vpfe_process_buffer_complete(vpfe_dev);
612			/*
613			 * based on whether the two fields are stored
614			 * interleavely or separately in memory, reconfigure
615			 * the CCDC memory address
616			 */
617			if (field == V4L2_FIELD_SEQ_TB) {
618				vpfe_schedule_bottom_field(vpfe_dev);
619			}
620			goto clear_intr;
621		}
622		/*
623		 * if one field is just being captured configure
624		 * the next frame get the next frame from the empty
625		 * queue if no frame is available hold on to the
626		 * current buffer
627		 */
628		spin_lock(&vpfe_dev->dma_queue_lock);
629		if (!list_empty(&vpfe_dev->dma_queue) &&
630		    vpfe_dev->cur_frm == vpfe_dev->next_frm)
631			vpfe_schedule_next_buffer(vpfe_dev);
632		spin_unlock(&vpfe_dev->dma_queue_lock);
633	} else if (fid == 0) {
634		/*
635		 * out of sync. Recover from any hardware out-of-sync.
636		 * May loose one frame
637		 */
638		vpfe_dev->field_id = fid;
639	}
640clear_intr:
641	if (vpfe_dev->cfg->clr_intr)
642		vpfe_dev->cfg->clr_intr(irq);
643
644	return IRQ_HANDLED;
645}
646
647/* vdint1_isr - isr handler for VINT1 interrupt */
648static irqreturn_t vdint1_isr(int irq, void *dev_id)
649{
650	struct vpfe_device *vpfe_dev = dev_id;
651
652	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
653
654	/* if streaming not started, don't do anything */
655	if (!vpfe_dev->started) {
656		if (vpfe_dev->cfg->clr_intr)
657			vpfe_dev->cfg->clr_intr(irq);
658		return IRQ_HANDLED;
659	}
660
661	spin_lock(&vpfe_dev->dma_queue_lock);
662	if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
663	    !list_empty(&vpfe_dev->dma_queue) &&
664	    vpfe_dev->cur_frm == vpfe_dev->next_frm)
665		vpfe_schedule_next_buffer(vpfe_dev);
666	spin_unlock(&vpfe_dev->dma_queue_lock);
667
668	if (vpfe_dev->cfg->clr_intr)
669		vpfe_dev->cfg->clr_intr(irq);
670
671	return IRQ_HANDLED;
672}
673
674static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
675{
676	enum ccdc_frmfmt frame_format;
677
678	frame_format = ccdc_dev->hw_ops.get_frame_format();
679	if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
680		free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
681}
682
683static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
684{
685	enum ccdc_frmfmt frame_format;
686
687	frame_format = ccdc_dev->hw_ops.get_frame_format();
688	if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
689		return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
690				    0, "vpfe_capture1",
691				    vpfe_dev);
692	}
693	return 0;
694}
695
696/* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
697static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
698{
699	vpfe_dev->started = 0;
700	ccdc_dev->hw_ops.enable(0);
701	if (ccdc_dev->hw_ops.enable_out_to_sdram)
702		ccdc_dev->hw_ops.enable_out_to_sdram(0);
703}
704
705/*
706 * vpfe_release : This function deletes buffer queue, frees the
707 * buffers and the vpfe file  handle
708 */
709static int vpfe_release(struct file *file)
710{
711	struct vpfe_device *vpfe_dev = video_drvdata(file);
712	struct vpfe_fh *fh = file->private_data;
713	struct vpfe_subdev_info *sdinfo;
714	int ret;
715
716	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
717
718	/* Get the device lock */
719	mutex_lock(&vpfe_dev->lock);
720	/* if this instance is doing IO */
721	if (fh->io_allowed) {
722		if (vpfe_dev->started) {
723			sdinfo = vpfe_dev->current_subdev;
724			ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
725							 sdinfo->grp_id,
726							 video, s_stream, 0);
727			if (ret && (ret != -ENOIOCTLCMD))
728				v4l2_err(&vpfe_dev->v4l2_dev,
729				"stream off failed in subdev\n");
730			vpfe_stop_ccdc_capture(vpfe_dev);
731			vpfe_detach_irq(vpfe_dev);
732			videobuf_streamoff(&vpfe_dev->buffer_queue);
733		}
734		vpfe_dev->io_usrs = 0;
735		vpfe_dev->numbuffers = config_params.numbuffers;
736		videobuf_stop(&vpfe_dev->buffer_queue);
737		videobuf_mmap_free(&vpfe_dev->buffer_queue);
738	}
739
740	/* Decrement device usrs counter */
741	vpfe_dev->usrs--;
742	v4l2_fh_del(&fh->fh);
743	v4l2_fh_exit(&fh->fh);
744	/* If this is the last file handle */
745	if (!vpfe_dev->usrs) {
746		vpfe_dev->initialized = 0;
747		if (ccdc_dev->hw_ops.close)
748			ccdc_dev->hw_ops.close(vpfe_dev->pdev);
749		module_put(ccdc_dev->owner);
750	}
751	mutex_unlock(&vpfe_dev->lock);
752	file->private_data = NULL;
753	/* Free memory allocated to file handle object */
754	kfree(fh);
755	return 0;
756}
757
758/*
759 * vpfe_mmap : It is used to map kernel space buffers
760 * into user spaces
761 */
762static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
763{
764	/* Get the device object and file handle object */
765	struct vpfe_device *vpfe_dev = video_drvdata(file);
766
767	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
768
769	return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
770}
771
772/*
773 * vpfe_poll: It is used for select/poll system call
774 */
775static unsigned int vpfe_poll(struct file *file, poll_table *wait)
776{
777	struct vpfe_device *vpfe_dev = video_drvdata(file);
778
779	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
780
781	if (vpfe_dev->started)
782		return videobuf_poll_stream(file,
783					    &vpfe_dev->buffer_queue, wait);
784	return 0;
785}
786
787/* vpfe capture driver file operations */
788static const struct v4l2_file_operations vpfe_fops = {
789	.owner = THIS_MODULE,
790	.open = vpfe_open,
791	.release = vpfe_release,
792	.unlocked_ioctl = video_ioctl2,
793	.mmap = vpfe_mmap,
794	.poll = vpfe_poll
795};
796
797/*
798 * vpfe_check_format()
799 * This function adjust the input pixel format as per hardware
800 * capabilities and update the same in pixfmt.
801 * Following algorithm used :-
802 *
803 *	If given pixformat is not in the vpfe list of pix formats or not
804 *	supported by the hardware, current value of pixformat in the device
805 *	is used
806 *	If given field is not supported, then current field is used. If field
807 *	is different from current, then it is matched with that from sub device.
808 *	Minimum height is 2 lines for interlaced or tb field and 1 line for
809 *	progressive. Maximum height is clamped to active active lines of scan
810 *	Minimum width is 32 bytes in memory and width is clamped to active
811 *	pixels of scan.
812 *	bytesperline is a multiple of 32.
813 */
814static const struct vpfe_pixel_format *
815	vpfe_check_format(struct vpfe_device *vpfe_dev,
816			  struct v4l2_pix_format *pixfmt)
817{
818	u32 min_height = 1, min_width = 32, max_width, max_height;
819	const struct vpfe_pixel_format *vpfe_pix_fmt;
820	u32 pix;
821	int temp, found;
822
823	vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
824	if (NULL == vpfe_pix_fmt) {
825		/*
826		 * use current pixel format in the vpfe device. We
827		 * will find this pix format in the table
828		 */
829		pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
830		vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
831	}
832
833	/* check if hw supports it */
834	temp = 0;
835	found = 0;
836	while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
837		if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
838			found = 1;
839			break;
840		}
841		temp++;
842	}
843
844	if (!found) {
845		/* use current pixel format */
846		pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
847		/*
848		 * Since this is currently used in the vpfe device, we
849		 * will find this pix format in the table
850		 */
851		vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
852	}
853
854	/* check what field format is supported */
855	if (pixfmt->field == V4L2_FIELD_ANY) {
856		/* if field is any, use current value as default */
857		pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
858	}
859
860	/*
861	 * if field is not same as current field in the vpfe device
862	 * try matching the field with the sub device field
863	 */
864	if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
865		/*
866		 * If field value is not in the supported fields, use current
867		 * field used in the device as default
868		 */
869		switch (pixfmt->field) {
870		case V4L2_FIELD_INTERLACED:
871		case V4L2_FIELD_SEQ_TB:
872			/* if sub device is supporting progressive, use that */
873			if (!vpfe_dev->std_info.frame_format)
874				pixfmt->field = V4L2_FIELD_NONE;
875			break;
876		case V4L2_FIELD_NONE:
877			if (vpfe_dev->std_info.frame_format)
878				pixfmt->field = V4L2_FIELD_INTERLACED;
879			break;
880
881		default:
882			/* use current field as default */
883			pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
884			break;
885		}
886	}
887
888	/* Now adjust image resolutions supported */
889	if (pixfmt->field == V4L2_FIELD_INTERLACED ||
890	    pixfmt->field == V4L2_FIELD_SEQ_TB)
891		min_height = 2;
892
893	max_width = vpfe_dev->std_info.active_pixels;
894	max_height = vpfe_dev->std_info.active_lines;
895	min_width /= vpfe_pix_fmt->bpp;
896
897	v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
898		  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
899
900	pixfmt->width = clamp((pixfmt->width), min_width, max_width);
901	pixfmt->height = clamp((pixfmt->height), min_height, max_height);
902
903	/* If interlaced, adjust height to be a multiple of 2 */
904	if (pixfmt->field == V4L2_FIELD_INTERLACED)
905		pixfmt->height &= (~1);
906	/*
907	 * recalculate bytesperline and sizeimage since width
908	 * and height might have changed
909	 */
910	pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
911				& ~31);
912	if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
913		pixfmt->sizeimage =
914			pixfmt->bytesperline * pixfmt->height +
915			((pixfmt->bytesperline * pixfmt->height) >> 1);
916	else
917		pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
918
919	v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
920		 " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
921		 pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
922		 pixfmt->bytesperline, pixfmt->sizeimage);
923	return vpfe_pix_fmt;
924}
925
926static int vpfe_querycap(struct file *file, void  *priv,
927			       struct v4l2_capability *cap)
928{
929	struct vpfe_device *vpfe_dev = video_drvdata(file);
930
931	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
932
933	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
934	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
935	strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
936	strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
937	strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
938	return 0;
939}
940
941static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
942				struct v4l2_format *fmt)
943{
944	struct vpfe_device *vpfe_dev = video_drvdata(file);
945
946	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
947	/* Fill in the information about format */
948	*fmt = vpfe_dev->fmt;
949	return 0;
950}
951
952static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
953				   struct v4l2_fmtdesc *fmt)
954{
955	struct vpfe_device *vpfe_dev = video_drvdata(file);
956	const struct vpfe_pixel_format *pix_fmt;
957	int temp_index;
958	u32 pix;
959
960	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
961
962	if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
963		return -EINVAL;
964
965	/* Fill in the information about format */
966	pix_fmt = vpfe_lookup_pix_format(pix);
967	if (NULL != pix_fmt) {
968		temp_index = fmt->index;
969		*fmt = pix_fmt->fmtdesc;
970		fmt->index = temp_index;
971		return 0;
972	}
973	return -EINVAL;
974}
975
976static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
977				struct v4l2_format *fmt)
978{
979	struct vpfe_device *vpfe_dev = video_drvdata(file);
980	const struct vpfe_pixel_format *pix_fmts;
981	int ret = 0;
982
983	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
984
985	/* If streaming is started, return error */
986	if (vpfe_dev->started) {
987		v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
988		return -EBUSY;
989	}
990
991	/* Check for valid frame format */
992	pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
993
994	if (NULL == pix_fmts)
995		return -EINVAL;
996
997	/* store the pixel format in the device  object */
998	ret = mutex_lock_interruptible(&vpfe_dev->lock);
999	if (ret)
1000		return ret;
1001
1002	/* First detach any IRQ if currently attached */
1003	vpfe_detach_irq(vpfe_dev);
1004	vpfe_dev->fmt = *fmt;
1005	/* set image capture parameters in the ccdc */
1006	ret = vpfe_config_ccdc_image_format(vpfe_dev);
1007	mutex_unlock(&vpfe_dev->lock);
1008	return ret;
1009}
1010
1011static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1012				  struct v4l2_format *f)
1013{
1014	struct vpfe_device *vpfe_dev = video_drvdata(file);
1015	const struct vpfe_pixel_format *pix_fmts;
1016
1017	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1018
1019	pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1020	if (NULL == pix_fmts)
1021		return -EINVAL;
1022	return 0;
1023}
1024
1025/*
1026 * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1027 * given app input index
1028 */
1029static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1030					int *subdev_index,
1031					int *subdev_input_index,
1032					int app_input_index)
1033{
1034	struct vpfe_config *cfg = vpfe_dev->cfg;
1035	struct vpfe_subdev_info *sdinfo;
1036	int i, j = 0;
1037
1038	for (i = 0; i < cfg->num_subdevs; i++) {
1039		sdinfo = &cfg->sub_devs[i];
1040		if (app_input_index < (j + sdinfo->num_inputs)) {
1041			*subdev_index = i;
1042			*subdev_input_index = app_input_index - j;
1043			return 0;
1044		}
1045		j += sdinfo->num_inputs;
1046	}
1047	return -EINVAL;
1048}
1049
1050/*
1051 * vpfe_get_app_input - Get app input index for a given subdev input index
1052 * driver stores the input index of the current sub device and translate it
1053 * when application request the current input
1054 */
1055static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1056				    int *app_input_index)
1057{
1058	struct vpfe_config *cfg = vpfe_dev->cfg;
1059	struct vpfe_subdev_info *sdinfo;
1060	int i, j = 0;
1061
1062	for (i = 0; i < cfg->num_subdevs; i++) {
1063		sdinfo = &cfg->sub_devs[i];
1064		if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1065			if (vpfe_dev->current_input >= sdinfo->num_inputs)
1066				return -1;
1067			*app_input_index = j + vpfe_dev->current_input;
1068			return 0;
1069		}
1070		j += sdinfo->num_inputs;
1071	}
1072	return -EINVAL;
1073}
1074
1075static int vpfe_enum_input(struct file *file, void *priv,
1076				 struct v4l2_input *inp)
1077{
1078	struct vpfe_device *vpfe_dev = video_drvdata(file);
1079	struct vpfe_subdev_info *sdinfo;
1080	int subdev, index ;
1081
1082	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1083
1084	if (vpfe_get_subdev_input_index(vpfe_dev,
1085					&subdev,
1086					&index,
1087					inp->index) < 0) {
1088		v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
1089			 " for the subdev\n");
1090		return -EINVAL;
1091	}
1092	sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1093	memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
1094	return 0;
1095}
1096
1097static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1098{
1099	struct vpfe_device *vpfe_dev = video_drvdata(file);
1100
1101	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1102
1103	return vpfe_get_app_input_index(vpfe_dev, index);
1104}
1105
1106
1107static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1108{
1109	struct vpfe_device *vpfe_dev = video_drvdata(file);
1110	struct v4l2_subdev *sd;
1111	struct vpfe_subdev_info *sdinfo;
1112	int subdev_index, inp_index;
1113	struct vpfe_route *route;
1114	u32 input = 0, output = 0;
1115	int ret = -EINVAL;
1116
1117	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1118
1119	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1120	if (ret)
1121		return ret;
1122
1123	/*
1124	 * If streaming is started return device busy
1125	 * error
1126	 */
1127	if (vpfe_dev->started) {
1128		v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1129		ret = -EBUSY;
1130		goto unlock_out;
1131	}
1132	ret = vpfe_get_subdev_input_index(vpfe_dev,
1133					  &subdev_index,
1134					  &inp_index,
1135					  index);
1136	if (ret < 0) {
1137		v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1138		goto unlock_out;
1139	}
1140
1141	sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1142	sd = vpfe_dev->sd[subdev_index];
1143	route = &sdinfo->routes[inp_index];
1144	if (route && sdinfo->can_route) {
1145		input = route->input;
1146		output = route->output;
1147	}
1148
1149	if (sd)
1150		ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1151
1152	if (ret) {
1153		v4l2_err(&vpfe_dev->v4l2_dev,
1154			"vpfe_doioctl:error in setting input in decoder\n");
1155		ret = -EINVAL;
1156		goto unlock_out;
1157	}
1158	vpfe_dev->current_subdev = sdinfo;
1159	if (sd)
1160		vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1161	vpfe_dev->current_input = index;
1162	vpfe_dev->std_index = 0;
1163
1164	/* set the bus/interface parameter for the sub device in ccdc */
1165	ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1166	if (ret)
1167		goto unlock_out;
1168
1169	/* set the default image parameters in the device */
1170	ret = vpfe_config_image_format(vpfe_dev,
1171				vpfe_standards[vpfe_dev->std_index].std_id);
1172unlock_out:
1173	mutex_unlock(&vpfe_dev->lock);
1174	return ret;
1175}
1176
1177static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1178{
1179	struct vpfe_device *vpfe_dev = video_drvdata(file);
1180	struct vpfe_subdev_info *sdinfo;
1181	int ret = 0;
1182
1183	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1184
1185	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1186	sdinfo = vpfe_dev->current_subdev;
1187	if (ret)
1188		return ret;
1189	/* Call querystd function of decoder device */
1190	ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1191					 video, querystd, std_id);
1192	mutex_unlock(&vpfe_dev->lock);
1193	return ret;
1194}
1195
1196static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1197{
1198	struct vpfe_device *vpfe_dev = video_drvdata(file);
1199	struct vpfe_subdev_info *sdinfo;
1200	int ret = 0;
1201
1202	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1203
1204	/* Call decoder driver function to set the standard */
1205	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1206	if (ret)
1207		return ret;
1208
1209	sdinfo = vpfe_dev->current_subdev;
1210	/* If streaming is started, return device busy error */
1211	if (vpfe_dev->started) {
1212		v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1213		ret = -EBUSY;
1214		goto unlock_out;
1215	}
1216
1217	ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1218					 video, s_std, std_id);
1219	if (ret < 0) {
1220		v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1221		goto unlock_out;
1222	}
1223	ret = vpfe_config_image_format(vpfe_dev, std_id);
1224
1225unlock_out:
1226	mutex_unlock(&vpfe_dev->lock);
1227	return ret;
1228}
1229
1230static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1231{
1232	struct vpfe_device *vpfe_dev = video_drvdata(file);
1233
1234	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1235
1236	*std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1237	return 0;
1238}
1239/*
1240 *  Videobuf operations
1241 */
1242static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1243				unsigned int *count,
1244				unsigned int *size)
1245{
1246	struct vpfe_fh *fh = vq->priv_data;
1247	struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1248
1249	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1250	*size = vpfe_dev->fmt.fmt.pix.sizeimage;
1251	if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1252		vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1253		*size = config_params.device_bufsize;
1254
1255	if (*count < config_params.min_numbuffers)
1256		*count = config_params.min_numbuffers;
1257	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1258		"count=%d, size=%d\n", *count, *size);
1259	return 0;
1260}
1261
1262static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1263				struct videobuf_buffer *vb,
1264				enum v4l2_field field)
1265{
1266	struct vpfe_fh *fh = vq->priv_data;
1267	struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1268	unsigned long addr;
1269	int ret;
1270
1271	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1272
1273	/* If buffer is not initialized, initialize it */
1274	if (VIDEOBUF_NEEDS_INIT == vb->state) {
1275		vb->width = vpfe_dev->fmt.fmt.pix.width;
1276		vb->height = vpfe_dev->fmt.fmt.pix.height;
1277		vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1278		vb->field = field;
1279
1280		ret = videobuf_iolock(vq, vb, NULL);
1281		if (ret < 0)
1282			return ret;
1283
1284		addr = videobuf_to_dma_contig(vb);
1285		/* Make sure user addresses are aligned to 32 bytes */
1286		if (!ALIGN(addr, 32))
1287			return -EINVAL;
1288
1289		vb->state = VIDEOBUF_PREPARED;
1290	}
1291	return 0;
1292}
1293
1294static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1295				struct videobuf_buffer *vb)
1296{
1297	/* Get the file handle object and device object */
1298	struct vpfe_fh *fh = vq->priv_data;
1299	struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1300	unsigned long flags;
1301
1302	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1303
1304	/* add the buffer to the DMA queue */
1305	spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1306	list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1307	spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1308
1309	/* Change state of the buffer */
1310	vb->state = VIDEOBUF_QUEUED;
1311}
1312
1313static void vpfe_videobuf_release(struct videobuf_queue *vq,
1314				  struct videobuf_buffer *vb)
1315{
1316	struct vpfe_fh *fh = vq->priv_data;
1317	struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1318	unsigned long flags;
1319
1320	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1321
1322	/*
1323	 * We need to flush the buffer from the dma queue since
1324	 * they are de-allocated
1325	 */
1326	spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1327	INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1328	spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1329	videobuf_dma_contig_free(vq, vb);
1330	vb->state = VIDEOBUF_NEEDS_INIT;
1331}
1332
1333static struct videobuf_queue_ops vpfe_videobuf_qops = {
1334	.buf_setup      = vpfe_videobuf_setup,
1335	.buf_prepare    = vpfe_videobuf_prepare,
1336	.buf_queue      = vpfe_videobuf_queue,
1337	.buf_release    = vpfe_videobuf_release,
1338};
1339
1340/*
1341 * vpfe_reqbufs. currently support REQBUF only once opening
1342 * the device.
1343 */
1344static int vpfe_reqbufs(struct file *file, void *priv,
1345			struct v4l2_requestbuffers *req_buf)
1346{
1347	struct vpfe_device *vpfe_dev = video_drvdata(file);
1348	struct vpfe_fh *fh = file->private_data;
1349	int ret = 0;
1350
1351	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1352
1353	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1354		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1355		return -EINVAL;
1356	}
1357
1358	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1359	if (ret)
1360		return ret;
1361
1362	if (vpfe_dev->io_usrs != 0) {
1363		v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1364		ret = -EBUSY;
1365		goto unlock_out;
1366	}
1367
1368	vpfe_dev->memory = req_buf->memory;
1369	videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1370				&vpfe_videobuf_qops,
1371				vpfe_dev->pdev,
1372				&vpfe_dev->irqlock,
1373				req_buf->type,
1374				vpfe_dev->fmt.fmt.pix.field,
1375				sizeof(struct videobuf_buffer),
1376				fh, NULL);
1377
1378	fh->io_allowed = 1;
1379	vpfe_dev->io_usrs = 1;
1380	INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1381	ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1382unlock_out:
1383	mutex_unlock(&vpfe_dev->lock);
1384	return ret;
1385}
1386
1387static int vpfe_querybuf(struct file *file, void *priv,
1388			 struct v4l2_buffer *buf)
1389{
1390	struct vpfe_device *vpfe_dev = video_drvdata(file);
1391
1392	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1393
1394	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1395		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1396		return  -EINVAL;
1397	}
1398
1399	if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1400		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1401		return -EINVAL;
1402	}
1403	/* Call videobuf_querybuf to get information */
1404	return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1405}
1406
1407static int vpfe_qbuf(struct file *file, void *priv,
1408		     struct v4l2_buffer *p)
1409{
1410	struct vpfe_device *vpfe_dev = video_drvdata(file);
1411	struct vpfe_fh *fh = file->private_data;
1412
1413	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1414
1415	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1416		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1417		return -EINVAL;
1418	}
1419
1420	/*
1421	 * If this file handle is not allowed to do IO,
1422	 * return error
1423	 */
1424	if (!fh->io_allowed) {
1425		v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1426		return -EACCES;
1427	}
1428	return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1429}
1430
1431static int vpfe_dqbuf(struct file *file, void *priv,
1432		      struct v4l2_buffer *buf)
1433{
1434	struct vpfe_device *vpfe_dev = video_drvdata(file);
1435
1436	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1437
1438	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1439		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1440		return -EINVAL;
1441	}
1442	return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1443				      buf, file->f_flags & O_NONBLOCK);
1444}
1445
1446/*
1447 * vpfe_calculate_offsets : This function calculates buffers offset
1448 * for top and bottom field
1449 */
1450static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1451{
1452	struct v4l2_rect image_win;
1453
1454	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1455
1456	ccdc_dev->hw_ops.get_image_window(&image_win);
1457	vpfe_dev->field_off = image_win.height * image_win.width;
1458}
1459
1460/* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1461static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1462{
1463	ccdc_dev->hw_ops.enable(1);
1464	if (ccdc_dev->hw_ops.enable_out_to_sdram)
1465		ccdc_dev->hw_ops.enable_out_to_sdram(1);
1466	vpfe_dev->started = 1;
1467}
1468
1469/*
1470 * vpfe_streamon. Assume the DMA queue is not empty.
1471 * application is expected to call QBUF before calling
1472 * this ioctl. If not, driver returns error
1473 */
1474static int vpfe_streamon(struct file *file, void *priv,
1475			 enum v4l2_buf_type buf_type)
1476{
1477	struct vpfe_device *vpfe_dev = video_drvdata(file);
1478	struct vpfe_fh *fh = file->private_data;
1479	struct vpfe_subdev_info *sdinfo;
1480	unsigned long addr;
1481	int ret = 0;
1482
1483	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1484
1485	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1486		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1487		return -EINVAL;
1488	}
1489
1490	/* If file handle is not allowed IO, return error */
1491	if (!fh->io_allowed) {
1492		v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1493		return -EACCES;
1494	}
1495
1496	sdinfo = vpfe_dev->current_subdev;
1497	ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1498					video, s_stream, 1);
1499
1500	if (ret && (ret != -ENOIOCTLCMD)) {
1501		v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1502		return -EINVAL;
1503	}
1504
1505	/* If buffer queue is empty, return error */
1506	if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1507		v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1508		return -EIO;
1509	}
1510
1511	/* Call videobuf_streamon to start streaming * in videobuf */
1512	ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1513	if (ret)
1514		return ret;
1515
1516
1517	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1518	if (ret)
1519		goto streamoff;
1520	/* Get the next frame from the buffer queue */
1521	vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1522					struct videobuf_buffer, queue);
1523	vpfe_dev->cur_frm = vpfe_dev->next_frm;
1524	/* Remove buffer from the buffer queue */
1525	list_del(&vpfe_dev->cur_frm->queue);
1526	/* Mark state of the current frame to active */
1527	vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1528	/* Initialize field_id and started member */
1529	vpfe_dev->field_id = 0;
1530	addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1531
1532	/* Calculate field offset */
1533	vpfe_calculate_offsets(vpfe_dev);
1534
1535	if (vpfe_attach_irq(vpfe_dev) < 0) {
1536		v4l2_err(&vpfe_dev->v4l2_dev,
1537			 "Error in attaching interrupt handle\n");
1538		ret = -EFAULT;
1539		goto unlock_out;
1540	}
1541	if (ccdc_dev->hw_ops.configure() < 0) {
1542		v4l2_err(&vpfe_dev->v4l2_dev,
1543			 "Error in configuring ccdc\n");
1544		ret = -EINVAL;
1545		goto unlock_out;
1546	}
1547	ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1548	vpfe_start_ccdc_capture(vpfe_dev);
1549	mutex_unlock(&vpfe_dev->lock);
1550	return ret;
1551unlock_out:
1552	mutex_unlock(&vpfe_dev->lock);
1553streamoff:
1554	ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1555	return ret;
1556}
1557
1558static int vpfe_streamoff(struct file *file, void *priv,
1559			  enum v4l2_buf_type buf_type)
1560{
1561	struct vpfe_device *vpfe_dev = video_drvdata(file);
1562	struct vpfe_fh *fh = file->private_data;
1563	struct vpfe_subdev_info *sdinfo;
1564	int ret = 0;
1565
1566	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1567
1568	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1569		v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1570		return -EINVAL;
1571	}
1572
1573	/* If io is allowed for this file handle, return error */
1574	if (!fh->io_allowed) {
1575		v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1576		return -EACCES;
1577	}
1578
1579	/* If streaming is not started, return error */
1580	if (!vpfe_dev->started) {
1581		v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1582		return -EINVAL;
1583	}
1584
1585	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1586	if (ret)
1587		return ret;
1588
1589	vpfe_stop_ccdc_capture(vpfe_dev);
1590	vpfe_detach_irq(vpfe_dev);
1591
1592	sdinfo = vpfe_dev->current_subdev;
1593	ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1594					video, s_stream, 0);
1595
1596	if (ret && (ret != -ENOIOCTLCMD))
1597		v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1598	ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1599	mutex_unlock(&vpfe_dev->lock);
1600	return ret;
1601}
1602
1603static int vpfe_cropcap(struct file *file, void *priv,
1604			      struct v4l2_cropcap *crop)
1605{
1606	struct vpfe_device *vpfe_dev = video_drvdata(file);
1607
1608	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1609
1610	if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1611		return -EINVAL;
1612
1613	memset(crop, 0, sizeof(struct v4l2_cropcap));
1614	crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1615	crop->bounds.width = crop->defrect.width =
1616		vpfe_standards[vpfe_dev->std_index].width;
1617	crop->bounds.height = crop->defrect.height =
1618		vpfe_standards[vpfe_dev->std_index].height;
1619	crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1620	return 0;
1621}
1622
1623static int vpfe_g_crop(struct file *file, void *priv,
1624			     struct v4l2_crop *crop)
1625{
1626	struct vpfe_device *vpfe_dev = video_drvdata(file);
1627
1628	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
1629
1630	crop->c = vpfe_dev->crop;
1631	return 0;
1632}
1633
1634static int vpfe_s_crop(struct file *file, void *priv,
1635			     const struct v4l2_crop *crop)
1636{
1637	struct vpfe_device *vpfe_dev = video_drvdata(file);
1638	struct v4l2_rect rect = crop->c;
1639	int ret = 0;
1640
1641	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
1642
1643	if (vpfe_dev->started) {
1644		/* make sure streaming is not started */
1645		v4l2_err(&vpfe_dev->v4l2_dev,
1646			"Cannot change crop when streaming is ON\n");
1647		return -EBUSY;
1648	}
1649
1650	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1651	if (ret)
1652		return ret;
1653
1654	if (rect.top < 0 || rect.left < 0) {
1655		v4l2_err(&vpfe_dev->v4l2_dev,
1656			"doesn't support negative values for top & left\n");
1657		ret = -EINVAL;
1658		goto unlock_out;
1659	}
1660
1661	/* adjust the width to 16 pixel boundary */
1662	rect.width = ((rect.width + 15) & ~0xf);
1663
1664	/* make sure parameters are valid */
1665	if ((rect.left + rect.width >
1666		vpfe_dev->std_info.active_pixels) ||
1667	    (rect.top + rect.height >
1668		vpfe_dev->std_info.active_lines)) {
1669		v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
1670		ret = -EINVAL;
1671		goto unlock_out;
1672	}
1673	ccdc_dev->hw_ops.set_image_window(&rect);
1674	vpfe_dev->fmt.fmt.pix.width = rect.width;
1675	vpfe_dev->fmt.fmt.pix.height = rect.height;
1676	vpfe_dev->fmt.fmt.pix.bytesperline =
1677		ccdc_dev->hw_ops.get_line_length();
1678	vpfe_dev->fmt.fmt.pix.sizeimage =
1679		vpfe_dev->fmt.fmt.pix.bytesperline *
1680		vpfe_dev->fmt.fmt.pix.height;
1681	vpfe_dev->crop = rect;
1682unlock_out:
1683	mutex_unlock(&vpfe_dev->lock);
1684	return ret;
1685}
1686
1687
1688static long vpfe_param_handler(struct file *file, void *priv,
1689		bool valid_prio, unsigned int cmd, void *param)
1690{
1691	struct vpfe_device *vpfe_dev = video_drvdata(file);
1692	int ret = 0;
1693
1694	v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1695
1696	if (vpfe_dev->started) {
1697		/* only allowed if streaming is not started */
1698		v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1699			"device already started\n");
1700		return -EBUSY;
1701	}
1702
1703	ret = mutex_lock_interruptible(&vpfe_dev->lock);
1704	if (ret)
1705		return ret;
1706
1707	switch (cmd) {
1708	case VPFE_CMD_S_CCDC_RAW_PARAMS:
1709		v4l2_warn(&vpfe_dev->v4l2_dev,
1710			  "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1711		if (ccdc_dev->hw_ops.set_params) {
1712			ret = ccdc_dev->hw_ops.set_params(param);
1713			if (ret) {
1714				v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1715					"Error setting parameters in CCDC\n");
1716				goto unlock_out;
1717			}
1718			ret = vpfe_get_ccdc_image_format(vpfe_dev,
1719							 &vpfe_dev->fmt);
1720			if (ret < 0) {
1721				v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1722					"Invalid image format at CCDC\n");
1723				goto unlock_out;
1724			}
1725		} else {
1726			ret = -EINVAL;
1727			v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1728				"VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1729		}
1730		break;
1731	default:
1732		ret = -ENOTTY;
1733	}
1734unlock_out:
1735	mutex_unlock(&vpfe_dev->lock);
1736	return ret;
1737}
1738
1739
1740/* vpfe capture ioctl operations */
1741static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1742	.vidioc_querycap	 = vpfe_querycap,
1743	.vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1744	.vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1745	.vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1746	.vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1747	.vidioc_enum_input	 = vpfe_enum_input,
1748	.vidioc_g_input		 = vpfe_g_input,
1749	.vidioc_s_input		 = vpfe_s_input,
1750	.vidioc_querystd	 = vpfe_querystd,
1751	.vidioc_s_std		 = vpfe_s_std,
1752	.vidioc_g_std		 = vpfe_g_std,
1753	.vidioc_reqbufs		 = vpfe_reqbufs,
1754	.vidioc_querybuf	 = vpfe_querybuf,
1755	.vidioc_qbuf		 = vpfe_qbuf,
1756	.vidioc_dqbuf		 = vpfe_dqbuf,
1757	.vidioc_streamon	 = vpfe_streamon,
1758	.vidioc_streamoff	 = vpfe_streamoff,
1759	.vidioc_cropcap		 = vpfe_cropcap,
1760	.vidioc_g_crop		 = vpfe_g_crop,
1761	.vidioc_s_crop		 = vpfe_s_crop,
1762	.vidioc_default		 = vpfe_param_handler,
1763};
1764
1765static struct vpfe_device *vpfe_initialize(void)
1766{
1767	struct vpfe_device *vpfe_dev;
1768
1769	/* Default number of buffers should be 3 */
1770	if ((numbuffers > 0) &&
1771	    (numbuffers < config_params.min_numbuffers))
1772		numbuffers = config_params.min_numbuffers;
1773
1774	/*
1775	 * Set buffer size to min buffers size if invalid buffer size is
1776	 * given
1777	 */
1778	if (bufsize < config_params.min_bufsize)
1779		bufsize = config_params.min_bufsize;
1780
1781	config_params.numbuffers = numbuffers;
1782
1783	if (numbuffers)
1784		config_params.device_bufsize = bufsize;
1785
1786	/* Allocate memory for device objects */
1787	vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1788
1789	return vpfe_dev;
1790}
1791
1792/*
1793 * vpfe_probe : This function creates device entries by register
1794 * itself to the V4L2 driver and initializes fields of each
1795 * device objects
1796 */
1797static int vpfe_probe(struct platform_device *pdev)
1798{
1799	struct vpfe_subdev_info *sdinfo;
1800	struct vpfe_config *vpfe_cfg;
1801	struct resource *res1;
1802	struct vpfe_device *vpfe_dev;
1803	struct i2c_adapter *i2c_adap;
1804	struct video_device *vfd;
1805	int ret = -ENOMEM, i, j;
1806	int num_subdevs = 0;
1807
1808	/* Get the pointer to the device object */
1809	vpfe_dev = vpfe_initialize();
1810
1811	if (!vpfe_dev) {
1812		v4l2_err(pdev->dev.driver,
1813			"Failed to allocate memory for vpfe_dev\n");
1814		return ret;
1815	}
1816
1817	vpfe_dev->pdev = &pdev->dev;
1818
1819	if (NULL == pdev->dev.platform_data) {
1820		v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1821		ret = -ENODEV;
1822		goto probe_free_dev_mem;
1823	}
1824
1825	vpfe_cfg = pdev->dev.platform_data;
1826	vpfe_dev->cfg = vpfe_cfg;
1827	if (NULL == vpfe_cfg->ccdc ||
1828	    NULL == vpfe_cfg->card_name ||
1829	    NULL == vpfe_cfg->sub_devs) {
1830		v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1831		ret = -ENOENT;
1832		goto probe_free_dev_mem;
1833	}
1834
1835	/* Allocate memory for ccdc configuration */
1836	ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
1837	if (NULL == ccdc_cfg) {
1838		v4l2_err(pdev->dev.driver,
1839			 "Memory allocation failed for ccdc_cfg\n");
1840		goto probe_free_dev_mem;
1841	}
1842
1843	mutex_lock(&ccdc_lock);
1844
1845	strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1846	/* Get VINT0 irq resource */
1847	res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1848	if (!res1) {
1849		v4l2_err(pdev->dev.driver,
1850			 "Unable to get interrupt for VINT0\n");
1851		ret = -ENODEV;
1852		goto probe_free_ccdc_cfg_mem;
1853	}
1854	vpfe_dev->ccdc_irq0 = res1->start;
1855
1856	/* Get VINT1 irq resource */
1857	res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1858	if (!res1) {
1859		v4l2_err(pdev->dev.driver,
1860			 "Unable to get interrupt for VINT1\n");
1861		ret = -ENODEV;
1862		goto probe_free_ccdc_cfg_mem;
1863	}
1864	vpfe_dev->ccdc_irq1 = res1->start;
1865
1866	ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1867			  "vpfe_capture0", vpfe_dev);
1868
1869	if (0 != ret) {
1870		v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1871		goto probe_free_ccdc_cfg_mem;
1872	}
1873
1874	vfd = &vpfe_dev->video_dev;
1875	/* Initialize field of video device */
1876	vfd->release		= video_device_release_empty;
1877	vfd->fops		= &vpfe_fops;
1878	vfd->ioctl_ops		= &vpfe_ioctl_ops;
1879	vfd->tvnorms		= 0;
1880	vfd->v4l2_dev 		= &vpfe_dev->v4l2_dev;
1881	snprintf(vfd->name, sizeof(vfd->name),
1882		 "%s_V%d.%d.%d",
1883		 CAPTURE_DRV_NAME,
1884		 (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1885		 (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1886		 (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1887
1888	ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1889	if (ret) {
1890		v4l2_err(pdev->dev.driver,
1891			"Unable to register v4l2 device.\n");
1892		goto probe_out_release_irq;
1893	}
1894	v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1895	spin_lock_init(&vpfe_dev->irqlock);
1896	spin_lock_init(&vpfe_dev->dma_queue_lock);
1897	mutex_init(&vpfe_dev->lock);
1898
1899	/* Initialize field of the device objects */
1900	vpfe_dev->numbuffers = config_params.numbuffers;
1901
1902	/* register video device */
1903	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1904		"trying to register vpfe device.\n");
1905	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1906		"video_dev=%p\n", &vpfe_dev->video_dev);
1907	vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1908	ret = video_register_device(&vpfe_dev->video_dev,
1909				    VFL_TYPE_GRABBER, -1);
1910
1911	if (ret) {
1912		v4l2_err(pdev->dev.driver,
1913			"Unable to register video device.\n");
1914		goto probe_out_v4l2_unregister;
1915	}
1916
1917	v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1918	/* set the driver data in platform device */
1919	platform_set_drvdata(pdev, vpfe_dev);
1920	/* set driver private data */
1921	video_set_drvdata(&vpfe_dev->video_dev, vpfe_dev);
1922	i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1923	num_subdevs = vpfe_cfg->num_subdevs;
1924	vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1925				GFP_KERNEL);
1926	if (NULL == vpfe_dev->sd) {
1927		v4l2_err(&vpfe_dev->v4l2_dev,
1928			"unable to allocate memory for subdevice pointers\n");
1929		ret = -ENOMEM;
1930		goto probe_out_video_unregister;
1931	}
1932
1933	for (i = 0; i < num_subdevs; i++) {
1934		struct v4l2_input *inps;
1935
1936		sdinfo = &vpfe_cfg->sub_devs[i];
1937
1938		/* Load up the subdevice */
1939		vpfe_dev->sd[i] =
1940			v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1941						  i2c_adap,
1942						  &sdinfo->board_info,
1943						  NULL);
1944		if (vpfe_dev->sd[i]) {
1945			v4l2_info(&vpfe_dev->v4l2_dev,
1946				  "v4l2 sub device %s registered\n",
1947				  sdinfo->name);
1948			vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1949			/* update tvnorms from the sub devices */
1950			for (j = 0; j < sdinfo->num_inputs; j++) {
1951				inps = &sdinfo->inputs[j];
1952				vfd->tvnorms |= inps->std;
1953			}
1954		} else {
1955			v4l2_info(&vpfe_dev->v4l2_dev,
1956				  "v4l2 sub device %s register fails\n",
1957				  sdinfo->name);
1958			goto probe_sd_out;
1959		}
1960	}
1961
1962	/* set first sub device as current one */
1963	vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1964	vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1965
1966	/* We have at least one sub device to work with */
1967	mutex_unlock(&ccdc_lock);
1968	return 0;
1969
1970probe_sd_out:
1971	kfree(vpfe_dev->sd);
1972probe_out_video_unregister:
1973	video_unregister_device(&vpfe_dev->video_dev);
1974probe_out_v4l2_unregister:
1975	v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1976probe_out_release_irq:
1977	free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1978probe_free_ccdc_cfg_mem:
1979	kfree(ccdc_cfg);
1980	mutex_unlock(&ccdc_lock);
1981probe_free_dev_mem:
1982	kfree(vpfe_dev);
1983	return ret;
1984}
1985
1986/*
1987 * vpfe_remove : It un-register device from V4L2 driver
1988 */
1989static int vpfe_remove(struct platform_device *pdev)
1990{
1991	struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
1992
1993	v4l2_info(pdev->dev.driver, "vpfe_remove\n");
1994
1995	free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1996	kfree(vpfe_dev->sd);
1997	v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1998	video_unregister_device(&vpfe_dev->video_dev);
1999	kfree(vpfe_dev);
2000	kfree(ccdc_cfg);
2001	return 0;
2002}
2003
2004static int vpfe_suspend(struct device *dev)
2005{
2006	return 0;
2007}
2008
2009static int vpfe_resume(struct device *dev)
2010{
2011	return 0;
2012}
2013
2014static const struct dev_pm_ops vpfe_dev_pm_ops = {
2015	.suspend = vpfe_suspend,
2016	.resume = vpfe_resume,
2017};
2018
2019static struct platform_driver vpfe_driver = {
2020	.driver = {
2021		.name = CAPTURE_DRV_NAME,
2022		.pm = &vpfe_dev_pm_ops,
2023	},
2024	.probe = vpfe_probe,
2025	.remove = vpfe_remove,
2026};
2027
2028module_platform_driver(vpfe_driver);
2029