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/drivers/media/video/saa7134/saa7134-empress.c

https://bitbucket.org/slukk/jb-tsm-kernel-4.2
C | 591 lines | 436 code | 113 blank | 42 comment | 39 complexity | 6f6df54896c692ed81b528853774b885 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1/*
  2 *
  3 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  4 *
  5 *  This program is free software; you can redistribute it and/or modify
  6 *  it under the terms of the GNU General Public License as published by
  7 *  the Free Software Foundation; either version 2 of the License, or
  8 *  (at your option) any later version.
  9 *
 10 *  This program is distributed in the hope that it will be useful,
 11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13 *  GNU General Public License for more details.
 14 *
 15 *  You should have received a copy of the GNU General Public License
 16 *  along with this program; if not, write to the Free Software
 17 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 18 */
 19
 20#include <linux/init.h>
 21#include <linux/list.h>
 22#include <linux/module.h>
 23#include <linux/kernel.h>
 24#include <linux/delay.h>
 25
 26#include "saa7134-reg.h"
 27#include "saa7134.h"
 28
 29#include <media/saa6752hs.h>
 30#include <media/v4l2-common.h>
 31#include <media/v4l2-chip-ident.h>
 32
 33/* ------------------------------------------------------------------ */
 34
 35MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
 36MODULE_LICENSE("GPL");
 37
 38static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
 39
 40module_param_array(empress_nr, int, NULL, 0444);
 41MODULE_PARM_DESC(empress_nr,"ts device number");
 42
 43static unsigned int debug;
 44module_param(debug, int, 0644);
 45MODULE_PARM_DESC(debug,"enable debug messages");
 46
 47#define dprintk(fmt, arg...)	if (debug)			\
 48	printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
 49
 50/* ------------------------------------------------------------------ */
 51
 52static void ts_reset_encoder(struct saa7134_dev* dev)
 53{
 54	if (!dev->empress_started)
 55		return;
 56
 57	saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
 58	msleep(10);
 59	saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
 60	msleep(100);
 61	dev->empress_started = 0;
 62}
 63
 64static int ts_init_encoder(struct saa7134_dev* dev)
 65{
 66	u32 leading_null_bytes = 0;
 67
 68	/* If more cards start to need this, then this
 69	   should probably be added to the card definitions. */
 70	switch (dev->board) {
 71	case SAA7134_BOARD_BEHOLD_M6:
 72	case SAA7134_BOARD_BEHOLD_M63:
 73	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
 74		leading_null_bytes = 1;
 75		break;
 76	}
 77	ts_reset_encoder(dev);
 78	saa_call_all(dev, core, init, leading_null_bytes);
 79	dev->empress_started = 1;
 80	return 0;
 81}
 82
 83/* ------------------------------------------------------------------ */
 84
 85static int ts_open(struct file *file)
 86{
 87	struct video_device *vdev = video_devdata(file);
 88	struct saa7134_dev *dev = video_drvdata(file);
 89	int err;
 90
 91	dprintk("open dev=%s\n", video_device_node_name(vdev));
 92	err = -EBUSY;
 93	if (!mutex_trylock(&dev->empress_tsq.vb_lock))
 94		return err;
 95	if (atomic_read(&dev->empress_users))
 96		goto done;
 97
 98	/* Unmute audio */
 99	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
100		saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
101
102	atomic_inc(&dev->empress_users);
103	file->private_data = dev;
104	err = 0;
105
106done:
107	mutex_unlock(&dev->empress_tsq.vb_lock);
108	return err;
109}
110
111static int ts_release(struct file *file)
112{
113	struct saa7134_dev *dev = file->private_data;
114
115	videobuf_stop(&dev->empress_tsq);
116	videobuf_mmap_free(&dev->empress_tsq);
117
118	/* stop the encoder */
119	ts_reset_encoder(dev);
120
121	/* Mute audio */
122	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
123		saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
124
125	atomic_dec(&dev->empress_users);
126
127	return 0;
128}
129
130static ssize_t
131ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
132{
133	struct saa7134_dev *dev = file->private_data;
134
135	if (!dev->empress_started)
136		ts_init_encoder(dev);
137
138	return videobuf_read_stream(&dev->empress_tsq,
139				    data, count, ppos, 0,
140				    file->f_flags & O_NONBLOCK);
141}
142
143static unsigned int
144ts_poll(struct file *file, struct poll_table_struct *wait)
145{
146	struct saa7134_dev *dev = file->private_data;
147
148	return videobuf_poll_stream(file, &dev->empress_tsq, wait);
149}
150
151
152static int
153ts_mmap(struct file *file, struct vm_area_struct * vma)
154{
155	struct saa7134_dev *dev = file->private_data;
156
157	return videobuf_mmap_mapper(&dev->empress_tsq, vma);
158}
159
160/*
161 * This function is _not_ called directly, but from
162 * video_generic_ioctl (and maybe others).  userspace
163 * copying is done already, arg is a kernel pointer.
164 */
165
166static int empress_querycap(struct file *file, void  *priv,
167					struct v4l2_capability *cap)
168{
169	struct saa7134_dev *dev = file->private_data;
170
171	strcpy(cap->driver, "saa7134");
172	strlcpy(cap->card, saa7134_boards[dev->board].name,
173		sizeof(cap->card));
174	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
175	cap->version = SAA7134_VERSION_CODE;
176	cap->capabilities =
177		V4L2_CAP_VIDEO_CAPTURE |
178		V4L2_CAP_READWRITE |
179		V4L2_CAP_STREAMING;
180	return 0;
181}
182
183static int empress_enum_input(struct file *file, void *priv,
184					struct v4l2_input *i)
185{
186	if (i->index != 0)
187		return -EINVAL;
188
189	i->type = V4L2_INPUT_TYPE_CAMERA;
190	strcpy(i->name, "CCIR656");
191
192	return 0;
193}
194
195static int empress_g_input(struct file *file, void *priv, unsigned int *i)
196{
197	*i = 0;
198	return 0;
199}
200
201static int empress_s_input(struct file *file, void *priv, unsigned int i)
202{
203	if (i != 0)
204		return -EINVAL;
205
206	return 0;
207}
208
209static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
210					struct v4l2_fmtdesc *f)
211{
212	if (f->index != 0)
213		return -EINVAL;
214
215	strlcpy(f->description, "MPEG TS", sizeof(f->description));
216	f->pixelformat = V4L2_PIX_FMT_MPEG;
217
218	return 0;
219}
220
221static int empress_g_fmt_vid_cap(struct file *file, void *priv,
222				struct v4l2_format *f)
223{
224	struct saa7134_dev *dev = file->private_data;
225	struct v4l2_mbus_framefmt mbus_fmt;
226
227	saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
228
229	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
230	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
231	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
232
233	return 0;
234}
235
236static int empress_s_fmt_vid_cap(struct file *file, void *priv,
237				struct v4l2_format *f)
238{
239	struct saa7134_dev *dev = file->private_data;
240	struct v4l2_mbus_framefmt mbus_fmt;
241
242	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
243	saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
244	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
245
246	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
247	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
248
249	return 0;
250}
251
252static int empress_try_fmt_vid_cap(struct file *file, void *priv,
253				struct v4l2_format *f)
254{
255	struct saa7134_dev *dev = file->private_data;
256
257	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
258	f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
259
260	return 0;
261}
262
263static int empress_reqbufs(struct file *file, void *priv,
264					struct v4l2_requestbuffers *p)
265{
266	struct saa7134_dev *dev = file->private_data;
267
268	return videobuf_reqbufs(&dev->empress_tsq, p);
269}
270
271static int empress_querybuf(struct file *file, void *priv,
272					struct v4l2_buffer *b)
273{
274	struct saa7134_dev *dev = file->private_data;
275
276	return videobuf_querybuf(&dev->empress_tsq, b);
277}
278
279static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
280{
281	struct saa7134_dev *dev = file->private_data;
282
283	return videobuf_qbuf(&dev->empress_tsq, b);
284}
285
286static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
287{
288	struct saa7134_dev *dev = file->private_data;
289
290	return videobuf_dqbuf(&dev->empress_tsq, b,
291				file->f_flags & O_NONBLOCK);
292}
293
294static int empress_streamon(struct file *file, void *priv,
295					enum v4l2_buf_type type)
296{
297	struct saa7134_dev *dev = file->private_data;
298
299	return videobuf_streamon(&dev->empress_tsq);
300}
301
302static int empress_streamoff(struct file *file, void *priv,
303					enum v4l2_buf_type type)
304{
305	struct saa7134_dev *dev = file->private_data;
306
307	return videobuf_streamoff(&dev->empress_tsq);
308}
309
310static int empress_s_ext_ctrls(struct file *file, void *priv,
311			       struct v4l2_ext_controls *ctrls)
312{
313	struct saa7134_dev *dev = file->private_data;
314	int err;
315
316	/* count == 0 is abused in saa6752hs.c, so that special
317		case is handled here explicitly. */
318	if (ctrls->count == 0)
319		return 0;
320
321	if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
322		return -EINVAL;
323
324	err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
325	ts_init_encoder(dev);
326
327	return err;
328}
329
330static int empress_g_ext_ctrls(struct file *file, void *priv,
331			       struct v4l2_ext_controls *ctrls)
332{
333	struct saa7134_dev *dev = file->private_data;
334
335	if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
336		return -EINVAL;
337	return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
338}
339
340static int empress_g_ctrl(struct file *file, void *priv,
341					struct v4l2_control *c)
342{
343	struct saa7134_dev *dev = file->private_data;
344
345	return saa7134_g_ctrl_internal(dev, NULL, c);
346}
347
348static int empress_s_ctrl(struct file *file, void *priv,
349					struct v4l2_control *c)
350{
351	struct saa7134_dev *dev = file->private_data;
352
353	return saa7134_s_ctrl_internal(dev, NULL, c);
354}
355
356static int empress_queryctrl(struct file *file, void *priv,
357					struct v4l2_queryctrl *c)
358{
359	/* Must be sorted from low to high control ID! */
360	static const u32 user_ctrls[] = {
361		V4L2_CID_USER_CLASS,
362		V4L2_CID_BRIGHTNESS,
363		V4L2_CID_CONTRAST,
364		V4L2_CID_SATURATION,
365		V4L2_CID_HUE,
366		V4L2_CID_AUDIO_VOLUME,
367		V4L2_CID_AUDIO_MUTE,
368		V4L2_CID_HFLIP,
369		0
370	};
371
372	/* Must be sorted from low to high control ID! */
373	static const u32 mpeg_ctrls[] = {
374		V4L2_CID_MPEG_CLASS,
375		V4L2_CID_MPEG_STREAM_TYPE,
376		V4L2_CID_MPEG_STREAM_PID_PMT,
377		V4L2_CID_MPEG_STREAM_PID_AUDIO,
378		V4L2_CID_MPEG_STREAM_PID_VIDEO,
379		V4L2_CID_MPEG_STREAM_PID_PCR,
380		V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
381		V4L2_CID_MPEG_AUDIO_ENCODING,
382		V4L2_CID_MPEG_AUDIO_L2_BITRATE,
383		V4L2_CID_MPEG_VIDEO_ENCODING,
384		V4L2_CID_MPEG_VIDEO_ASPECT,
385		V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
386		V4L2_CID_MPEG_VIDEO_BITRATE,
387		V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
388		0
389	};
390	static const u32 *ctrl_classes[] = {
391		user_ctrls,
392		mpeg_ctrls,
393		NULL
394	};
395	struct saa7134_dev *dev = file->private_data;
396
397	c->id = v4l2_ctrl_next(ctrl_classes, c->id);
398	if (c->id == 0)
399		return -EINVAL;
400	if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
401		return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
402	if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
403		return saa7134_queryctrl(file, priv, c);
404	return saa_call_empress(dev, core, queryctrl, c);
405}
406
407static int empress_querymenu(struct file *file, void *priv,
408					struct v4l2_querymenu *c)
409{
410	struct saa7134_dev *dev = file->private_data;
411
412	if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
413		return -EINVAL;
414	return saa_call_empress(dev, core, querymenu, c);
415}
416
417static int empress_g_chip_ident(struct file *file, void *fh,
418	       struct v4l2_dbg_chip_ident *chip)
419{
420	struct saa7134_dev *dev = file->private_data;
421
422	chip->ident = V4L2_IDENT_NONE;
423	chip->revision = 0;
424	if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
425	    !strcmp(chip->match.name, "saa6752hs"))
426		return saa_call_empress(dev, core, g_chip_ident, chip);
427	if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
428		return saa_call_empress(dev, core, g_chip_ident, chip);
429	return -EINVAL;
430}
431
432static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
433{
434	struct saa7134_dev *dev = file->private_data;
435
436	return saa7134_s_std_internal(dev, NULL, id);
437}
438
439static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
440{
441	struct saa7134_dev *dev = file->private_data;
442
443	*id = dev->tvnorm->id;
444	return 0;
445}
446
447static const struct v4l2_file_operations ts_fops =
448{
449	.owner	  = THIS_MODULE,
450	.open	  = ts_open,
451	.release  = ts_release,
452	.read	  = ts_read,
453	.poll	  = ts_poll,
454	.mmap	  = ts_mmap,
455	.ioctl	  = video_ioctl2,
456};
457
458static const struct v4l2_ioctl_ops ts_ioctl_ops = {
459	.vidioc_querycap		= empress_querycap,
460	.vidioc_enum_fmt_vid_cap	= empress_enum_fmt_vid_cap,
461	.vidioc_try_fmt_vid_cap		= empress_try_fmt_vid_cap,
462	.vidioc_s_fmt_vid_cap		= empress_s_fmt_vid_cap,
463	.vidioc_g_fmt_vid_cap		= empress_g_fmt_vid_cap,
464	.vidioc_reqbufs			= empress_reqbufs,
465	.vidioc_querybuf		= empress_querybuf,
466	.vidioc_qbuf			= empress_qbuf,
467	.vidioc_dqbuf			= empress_dqbuf,
468	.vidioc_streamon		= empress_streamon,
469	.vidioc_streamoff		= empress_streamoff,
470	.vidioc_s_ext_ctrls		= empress_s_ext_ctrls,
471	.vidioc_g_ext_ctrls		= empress_g_ext_ctrls,
472	.vidioc_enum_input		= empress_enum_input,
473	.vidioc_g_input			= empress_g_input,
474	.vidioc_s_input			= empress_s_input,
475	.vidioc_queryctrl		= empress_queryctrl,
476	.vidioc_querymenu		= empress_querymenu,
477	.vidioc_g_ctrl			= empress_g_ctrl,
478	.vidioc_s_ctrl			= empress_s_ctrl,
479	.vidioc_g_chip_ident 		= empress_g_chip_ident,
480	.vidioc_s_std			= empress_s_std,
481	.vidioc_g_std			= empress_g_std,
482};
483
484/* ----------------------------------------------------------- */
485
486static struct video_device saa7134_empress_template = {
487	.name          = "saa7134-empress",
488	.fops          = &ts_fops,
489	.ioctl_ops     = &ts_ioctl_ops,
490
491	.tvnorms			= SAA7134_NORMS,
492	.current_norm			= V4L2_STD_PAL,
493};
494
495static void empress_signal_update(struct work_struct *work)
496{
497	struct saa7134_dev* dev =
498		container_of(work, struct saa7134_dev, empress_workqueue);
499
500	if (dev->nosignal) {
501		dprintk("no video signal\n");
502	} else {
503		dprintk("video signal acquired\n");
504	}
505}
506
507static void empress_signal_change(struct saa7134_dev *dev)
508{
509	schedule_work(&dev->empress_workqueue);
510}
511
512
513static int empress_init(struct saa7134_dev *dev)
514{
515	int err;
516
517	dprintk("%s: %s\n",dev->name,__func__);
518	dev->empress_dev = video_device_alloc();
519	if (NULL == dev->empress_dev)
520		return -ENOMEM;
521	*(dev->empress_dev) = saa7134_empress_template;
522	dev->empress_dev->parent  = &dev->pci->dev;
523	dev->empress_dev->release = video_device_release;
524	snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
525		 "%s empress (%s)", dev->name,
526		 saa7134_boards[dev->board].name);
527
528	INIT_WORK(&dev->empress_workqueue, empress_signal_update);
529
530	video_set_drvdata(dev->empress_dev, dev);
531	err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
532				    empress_nr[dev->nr]);
533	if (err < 0) {
534		printk(KERN_INFO "%s: can't register video device\n",
535		       dev->name);
536		video_device_release(dev->empress_dev);
537		dev->empress_dev = NULL;
538		return err;
539	}
540	printk(KERN_INFO "%s: registered device %s [mpeg]\n",
541	       dev->name, video_device_node_name(dev->empress_dev));
542
543	videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
544			    &dev->pci->dev, &dev->slock,
545			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
546			    V4L2_FIELD_ALTERNATE,
547			    sizeof(struct saa7134_buf),
548			    dev, NULL);
549
550	empress_signal_update(&dev->empress_workqueue);
551	return 0;
552}
553
554static int empress_fini(struct saa7134_dev *dev)
555{
556	dprintk("%s: %s\n",dev->name,__func__);
557
558	if (NULL == dev->empress_dev)
559		return 0;
560	flush_work_sync(&dev->empress_workqueue);
561	video_unregister_device(dev->empress_dev);
562	dev->empress_dev = NULL;
563	return 0;
564}
565
566static struct saa7134_mpeg_ops empress_ops = {
567	.type          = SAA7134_MPEG_EMPRESS,
568	.init          = empress_init,
569	.fini          = empress_fini,
570	.signal_change = empress_signal_change,
571};
572
573static int __init empress_register(void)
574{
575	return saa7134_ts_register(&empress_ops);
576}
577
578static void __exit empress_unregister(void)
579{
580	saa7134_ts_unregister(&empress_ops);
581}
582
583module_init(empress_register);
584module_exit(empress_unregister);
585
586/* ----------------------------------------------------------- */
587/*
588 * Local variables:
589 * c-basic-offset: 8
590 * End:
591 */