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