V4L/DVB (8639): saa6752hs: cleanup and add AC-3 support
[linux-3.10.git] / drivers / media / video / saa7134 / saa7134-empress.c
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/slab.h>
25 #include <linux/delay.h>
26
27 #include "saa7134-reg.h"
28 #include "saa7134.h"
29
30 #include <media/saa6752hs.h>
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-chip-ident.h>
33
34 /* ------------------------------------------------------------------ */
35
36 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
37 MODULE_LICENSE("GPL");
38
39 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
40
41 module_param_array(empress_nr, int, NULL, 0444);
42 MODULE_PARM_DESC(empress_nr,"ts device number");
43
44 static unsigned int debug;
45 module_param(debug, int, 0644);
46 MODULE_PARM_DESC(debug,"enable debug messages");
47
48 #define dprintk(fmt, arg...)    if (debug)                      \
49         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
50
51 /* ------------------------------------------------------------------ */
52
53 static void ts_reset_encoder(struct saa7134_dev* dev)
54 {
55         if (!dev->empress_started)
56                 return;
57
58         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
59         msleep(10);
60         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
61         msleep(100);
62         dev->empress_started = 0;
63 }
64
65 static int ts_init_encoder(struct saa7134_dev* dev)
66 {
67         struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
68
69         ts_reset_encoder(dev);
70         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
71         dev->empress_started = 1;
72         return 0;
73 }
74
75 /* ------------------------------------------------------------------ */
76
77 static int ts_open(struct inode *inode, struct file *file)
78 {
79         int minor = iminor(inode);
80         struct saa7134_dev *dev;
81         int err;
82
83         lock_kernel();
84         list_for_each_entry(dev, &saa7134_devlist, devlist)
85                 if (dev->empress_dev && dev->empress_dev->minor == minor)
86                         goto found;
87         unlock_kernel();
88         return -ENODEV;
89  found:
90
91         dprintk("open minor=%d\n",minor);
92         err = -EBUSY;
93         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
94                 goto done;
95         if (atomic_read(&dev->empress_users))
96                 goto done_up;
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
106 done_up:
107         mutex_unlock(&dev->empress_tsq.vb_lock);
108 done:
109         unlock_kernel();
110         return err;
111 }
112
113 static int ts_release(struct inode *inode, struct file *file)
114 {
115         struct saa7134_dev *dev = file->private_data;
116
117         videobuf_stop(&dev->empress_tsq);
118         videobuf_mmap_free(&dev->empress_tsq);
119
120         /* stop the encoder */
121         ts_reset_encoder(dev);
122
123         /* Mute audio */
124         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
125                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
126
127         atomic_dec(&dev->empress_users);
128
129         return 0;
130 }
131
132 static ssize_t
133 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
134 {
135         struct saa7134_dev *dev = file->private_data;
136
137         if (!dev->empress_started)
138                 ts_init_encoder(dev);
139
140         return videobuf_read_stream(&dev->empress_tsq,
141                                     data, count, ppos, 0,
142                                     file->f_flags & O_NONBLOCK);
143 }
144
145 static unsigned int
146 ts_poll(struct file *file, struct poll_table_struct *wait)
147 {
148         struct saa7134_dev *dev = file->private_data;
149
150         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
151 }
152
153
154 static int
155 ts_mmap(struct file *file, struct vm_area_struct * vma)
156 {
157         struct saa7134_dev *dev = file->private_data;
158
159         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
160 }
161
162 /*
163  * This function is _not_ called directly, but from
164  * video_generic_ioctl (and maybe others).  userspace
165  * copying is done already, arg is a kernel pointer.
166  */
167
168 static int empress_querycap(struct file *file, void  *priv,
169                                         struct v4l2_capability *cap)
170 {
171         struct saa7134_dev *dev = file->private_data;
172
173         strcpy(cap->driver, "saa7134");
174         strlcpy(cap->card, saa7134_boards[dev->board].name,
175                 sizeof(cap->card));
176         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
177         cap->version = SAA7134_VERSION_CODE;
178         cap->capabilities =
179                 V4L2_CAP_VIDEO_CAPTURE |
180                 V4L2_CAP_READWRITE |
181                 V4L2_CAP_STREAMING;
182         return 0;
183 }
184
185 static int empress_enum_input(struct file *file, void *priv,
186                                         struct v4l2_input *i)
187 {
188         if (i->index != 0)
189                 return -EINVAL;
190
191         i->type = V4L2_INPUT_TYPE_CAMERA;
192         strcpy(i->name, "CCIR656");
193
194         return 0;
195 }
196
197 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
198 {
199         *i = 0;
200         return 0;
201 }
202
203 static int empress_s_input(struct file *file, void *priv, unsigned int i)
204 {
205         if (i != 0)
206                 return -EINVAL;
207
208         return 0;
209 }
210
211 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
212                                         struct v4l2_fmtdesc *f)
213 {
214         if (f->index != 0)
215                 return -EINVAL;
216
217         strlcpy(f->description, "MPEG TS", sizeof(f->description));
218         f->pixelformat = V4L2_PIX_FMT_MPEG;
219
220         return 0;
221 }
222
223 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
224                                 struct v4l2_format *f)
225 {
226         struct saa7134_dev *dev = file->private_data;
227
228         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
229
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
236 static 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
241         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
242
243         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
244         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
245
246         return 0;
247 }
248
249
250 static int empress_reqbufs(struct file *file, void *priv,
251                                         struct v4l2_requestbuffers *p)
252 {
253         struct saa7134_dev *dev = file->private_data;
254
255         return videobuf_reqbufs(&dev->empress_tsq, p);
256 }
257
258 static int empress_querybuf(struct file *file, void *priv,
259                                         struct v4l2_buffer *b)
260 {
261         struct saa7134_dev *dev = file->private_data;
262
263         return videobuf_querybuf(&dev->empress_tsq, b);
264 }
265
266 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
267 {
268         struct saa7134_dev *dev = file->private_data;
269
270         return videobuf_qbuf(&dev->empress_tsq, b);
271 }
272
273 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
274 {
275         struct saa7134_dev *dev = file->private_data;
276
277         return videobuf_dqbuf(&dev->empress_tsq, b,
278                                 file->f_flags & O_NONBLOCK);
279 }
280
281 static int empress_streamon(struct file *file, void *priv,
282                                         enum v4l2_buf_type type)
283 {
284         struct saa7134_dev *dev = file->private_data;
285
286         return videobuf_streamon(&dev->empress_tsq);
287 }
288
289 static int empress_streamoff(struct file *file, void *priv,
290                                         enum v4l2_buf_type type)
291 {
292         struct saa7134_dev *dev = file->private_data;
293
294         return videobuf_streamoff(&dev->empress_tsq);
295 }
296
297 static int saa7134_i2c_call_saa6752(struct saa7134_dev *dev,
298                                               unsigned int cmd, void *arg)
299 {
300         if (dev->mpeg_i2c_client == NULL)
301                 return -EINVAL;
302         return dev->mpeg_i2c_client->driver->command(dev->mpeg_i2c_client,
303                                                                 cmd, arg);
304 }
305
306 static int empress_s_ext_ctrls(struct file *file, void *priv,
307                                struct v4l2_ext_controls *ctrls)
308 {
309         struct saa7134_dev *dev = file->private_data;
310         int err;
311
312         /* count == 0 is abused in saa6752hs.c, so that special
313                 case is handled here explicitly. */
314         if (ctrls->count == 0)
315                 return 0;
316
317         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
318                 return -EINVAL;
319
320         err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
321         ts_init_encoder(dev);
322
323         return err;
324 }
325
326 static int empress_g_ext_ctrls(struct file *file, void *priv,
327                                struct v4l2_ext_controls *ctrls)
328 {
329         struct saa7134_dev *dev = file->private_data;
330
331         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
332                 return -EINVAL;
333         return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
334 }
335
336 static int empress_g_ctrl(struct file *file, void *priv,
337                                         struct v4l2_control *c)
338 {
339         struct saa7134_dev *dev = file->private_data;
340
341         return saa7134_g_ctrl_internal(dev, NULL, c);
342 }
343
344 static int empress_s_ctrl(struct file *file, void *priv,
345                                         struct v4l2_control *c)
346 {
347         struct saa7134_dev *dev = file->private_data;
348
349         return saa7134_s_ctrl_internal(dev, NULL, c);
350 }
351
352 static int empress_queryctrl(struct file *file, void *priv,
353                                         struct v4l2_queryctrl *c)
354 {
355         static const u32 user_ctrls[] = {
356                 V4L2_CID_USER_CLASS,
357                 V4L2_CID_BRIGHTNESS,
358                 V4L2_CID_CONTRAST,
359                 V4L2_CID_SATURATION,
360                 V4L2_CID_HUE,
361                 V4L2_CID_AUDIO_VOLUME,
362                 V4L2_CID_AUDIO_MUTE,
363                 V4L2_CID_HFLIP,
364                 0
365         };
366
367         static const u32 mpeg_ctrls[] = {
368                 V4L2_CID_MPEG_CLASS,
369                 V4L2_CID_MPEG_STREAM_TYPE,
370                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
371                 V4L2_CID_MPEG_AUDIO_ENCODING,
372                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
373                 V4L2_CID_MPEG_VIDEO_ENCODING,
374                 V4L2_CID_MPEG_VIDEO_ASPECT,
375                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
376                 V4L2_CID_MPEG_VIDEO_BITRATE,
377                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
378                 0
379         };
380         static const u32 *ctrl_classes[] = {
381                 user_ctrls,
382                 mpeg_ctrls,
383                 NULL
384         };
385         struct saa7134_dev *dev = file->private_data;
386
387         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
388         if (c->id == 0)
389                 return -EINVAL;
390         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
391                 return v4l2_ctrl_query_fill_std(c);
392         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
393                 return saa7134_queryctrl(file, priv, c);
394         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
395 }
396
397 static int empress_querymenu(struct file *file, void *priv,
398                                         struct v4l2_querymenu *c)
399 {
400         struct saa7134_dev *dev = file->private_data;
401
402         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
403                 return -EINVAL;
404         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
405 }
406
407 static int empress_g_chip_ident(struct file *file, void *fh,
408                struct v4l2_chip_ident *chip)
409 {
410         struct saa7134_dev *dev = file->private_data;
411
412         chip->ident = V4L2_IDENT_NONE;
413         chip->revision = 0;
414         if (dev->mpeg_i2c_client == NULL)
415                 return -EINVAL;
416         if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER &&
417             chip->match_chip == I2C_DRIVERID_SAA6752HS)
418                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
419         if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR &&
420             chip->match_chip == dev->mpeg_i2c_client->addr)
421                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
422         return -EINVAL;
423 }
424
425
426 static const struct file_operations ts_fops =
427 {
428         .owner    = THIS_MODULE,
429         .open     = ts_open,
430         .release  = ts_release,
431         .read     = ts_read,
432         .poll     = ts_poll,
433         .mmap     = ts_mmap,
434         .ioctl    = video_ioctl2,
435         .llseek   = no_llseek,
436 };
437
438 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
439         .vidioc_querycap                = empress_querycap,
440         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
441         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
442         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
443         .vidioc_reqbufs                 = empress_reqbufs,
444         .vidioc_querybuf                = empress_querybuf,
445         .vidioc_qbuf                    = empress_qbuf,
446         .vidioc_dqbuf                   = empress_dqbuf,
447         .vidioc_streamon                = empress_streamon,
448         .vidioc_streamoff               = empress_streamoff,
449         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
450         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
451         .vidioc_enum_input              = empress_enum_input,
452         .vidioc_g_input                 = empress_g_input,
453         .vidioc_s_input                 = empress_s_input,
454         .vidioc_queryctrl               = empress_queryctrl,
455         .vidioc_querymenu               = empress_querymenu,
456         .vidioc_g_ctrl                  = empress_g_ctrl,
457         .vidioc_s_ctrl                  = empress_s_ctrl,
458         .vidioc_g_chip_ident            = empress_g_chip_ident,
459 };
460
461 /* ----------------------------------------------------------- */
462
463 static struct video_device saa7134_empress_template = {
464         .name          = "saa7134-empress",
465         .fops          = &ts_fops,
466         .minor         = -1,
467         .ioctl_ops     = &ts_ioctl_ops,
468
469         .tvnorms                        = SAA7134_NORMS,
470         .current_norm                   = V4L2_STD_PAL,
471 };
472
473 static void empress_signal_update(struct work_struct *work)
474 {
475         struct saa7134_dev* dev =
476                 container_of(work, struct saa7134_dev, empress_workqueue);
477
478         if (dev->nosignal) {
479                 dprintk("no video signal\n");
480                 ts_reset_encoder(dev);
481         } else {
482                 dprintk("video signal acquired\n");
483                 if (atomic_read(&dev->empress_users))
484                         ts_init_encoder(dev);
485         }
486 }
487
488 static void empress_signal_change(struct saa7134_dev *dev)
489 {
490         schedule_work(&dev->empress_workqueue);
491 }
492
493
494 static int empress_init(struct saa7134_dev *dev)
495 {
496         int err;
497
498         dprintk("%s: %s\n",dev->name,__func__);
499         dev->empress_dev = video_device_alloc();
500         if (NULL == dev->empress_dev)
501                 return -ENOMEM;
502         *(dev->empress_dev) = saa7134_empress_template;
503         dev->empress_dev->parent  = &dev->pci->dev;
504         dev->empress_dev->release = video_device_release;
505         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
506                  "%s empress (%s)", dev->name,
507                  saa7134_boards[dev->board].name);
508
509         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
510
511         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
512                                     empress_nr[dev->nr]);
513         if (err < 0) {
514                 printk(KERN_INFO "%s: can't register video device\n",
515                        dev->name);
516                 video_device_release(dev->empress_dev);
517                 dev->empress_dev = NULL;
518                 return err;
519         }
520         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
521                dev->name,dev->empress_dev->minor & 0x1f);
522
523         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
524                             &dev->pci->dev, &dev->slock,
525                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
526                             V4L2_FIELD_ALTERNATE,
527                             sizeof(struct saa7134_buf),
528                             dev);
529
530         empress_signal_update(&dev->empress_workqueue);
531         return 0;
532 }
533
534 static int empress_fini(struct saa7134_dev *dev)
535 {
536         dprintk("%s: %s\n",dev->name,__func__);
537
538         if (NULL == dev->empress_dev)
539                 return 0;
540         flush_scheduled_work();
541         video_unregister_device(dev->empress_dev);
542         dev->empress_dev = NULL;
543         return 0;
544 }
545
546 static struct saa7134_mpeg_ops empress_ops = {
547         .type          = SAA7134_MPEG_EMPRESS,
548         .init          = empress_init,
549         .fini          = empress_fini,
550         .signal_change = empress_signal_change,
551 };
552
553 static int __init empress_register(void)
554 {
555         return saa7134_ts_register(&empress_ops);
556 }
557
558 static void __exit empress_unregister(void)
559 {
560         saa7134_ts_unregister(&empress_ops);
561 }
562
563 module_init(empress_register);
564 module_exit(empress_unregister);
565
566 /* ----------------------------------------------------------- */
567 /*
568  * Local variables:
569  * c-basic-offset: 8
570  * End:
571  */