V4L/DVB (13555): v4l: Use video_device_node_name() instead of the minor number
[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/smp_lock.h>
26 #include <linux/delay.h>
27
28 #include "saa7134-reg.h"
29 #include "saa7134.h"
30
31 #include <media/saa6752hs.h>
32 #include <media/v4l2-common.h>
33 #include <media/v4l2-chip-ident.h>
34
35 /* ------------------------------------------------------------------ */
36
37 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
38 MODULE_LICENSE("GPL");
39
40 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
41
42 module_param_array(empress_nr, int, NULL, 0444);
43 MODULE_PARM_DESC(empress_nr,"ts device number");
44
45 static unsigned int debug;
46 module_param(debug, int, 0644);
47 MODULE_PARM_DESC(debug,"enable debug messages");
48
49 #define dprintk(fmt, arg...)    if (debug)                      \
50         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
51
52 /* ------------------------------------------------------------------ */
53
54 static void ts_reset_encoder(struct saa7134_dev* dev)
55 {
56         if (!dev->empress_started)
57                 return;
58
59         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
60         msleep(10);
61         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
62         msleep(100);
63         dev->empress_started = 0;
64 }
65
66 static int ts_init_encoder(struct saa7134_dev* dev)
67 {
68         u32 leading_null_bytes = 0;
69
70         /* If more cards start to need this, then this
71            should probably be added to the card definitions. */
72         switch (dev->board) {
73         case SAA7134_BOARD_BEHOLD_M6:
74         case SAA7134_BOARD_BEHOLD_M63:
75         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
76                 leading_null_bytes = 1;
77                 break;
78         }
79         ts_reset_encoder(dev);
80         saa_call_all(dev, core, init, leading_null_bytes);
81         dev->empress_started = 1;
82         return 0;
83 }
84
85 /* ------------------------------------------------------------------ */
86
87 static int ts_open(struct file *file)
88 {
89         struct video_device *vdev = video_devdata(file);
90         struct saa7134_dev *dev = video_drvdata(file);
91         int err;
92
93         dprintk("open dev=%s\n", video_device_node_name(vdev));
94         err = -EBUSY;
95         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
96                 goto done;
97         if (atomic_read(&dev->empress_users))
98                 goto done_up;
99
100         /* Unmute audio */
101         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
102                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
103
104         atomic_inc(&dev->empress_users);
105         file->private_data = dev;
106         err = 0;
107
108 done_up:
109         mutex_unlock(&dev->empress_tsq.vb_lock);
110 done:
111         unlock_kernel();
112         return err;
113 }
114
115 static int ts_release(struct file *file)
116 {
117         struct saa7134_dev *dev = file->private_data;
118
119         videobuf_stop(&dev->empress_tsq);
120         videobuf_mmap_free(&dev->empress_tsq);
121
122         /* stop the encoder */
123         ts_reset_encoder(dev);
124
125         /* Mute audio */
126         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
127                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
128
129         atomic_dec(&dev->empress_users);
130
131         return 0;
132 }
133
134 static ssize_t
135 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
136 {
137         struct saa7134_dev *dev = file->private_data;
138
139         if (!dev->empress_started)
140                 ts_init_encoder(dev);
141
142         return videobuf_read_stream(&dev->empress_tsq,
143                                     data, count, ppos, 0,
144                                     file->f_flags & O_NONBLOCK);
145 }
146
147 static unsigned int
148 ts_poll(struct file *file, struct poll_table_struct *wait)
149 {
150         struct saa7134_dev *dev = file->private_data;
151
152         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
153 }
154
155
156 static int
157 ts_mmap(struct file *file, struct vm_area_struct * vma)
158 {
159         struct saa7134_dev *dev = file->private_data;
160
161         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
162 }
163
164 /*
165  * This function is _not_ called directly, but from
166  * video_generic_ioctl (and maybe others).  userspace
167  * copying is done already, arg is a kernel pointer.
168  */
169
170 static int empress_querycap(struct file *file, void  *priv,
171                                         struct v4l2_capability *cap)
172 {
173         struct saa7134_dev *dev = file->private_data;
174
175         strcpy(cap->driver, "saa7134");
176         strlcpy(cap->card, saa7134_boards[dev->board].name,
177                 sizeof(cap->card));
178         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
179         cap->version = SAA7134_VERSION_CODE;
180         cap->capabilities =
181                 V4L2_CAP_VIDEO_CAPTURE |
182                 V4L2_CAP_READWRITE |
183                 V4L2_CAP_STREAMING;
184         return 0;
185 }
186
187 static int empress_enum_input(struct file *file, void *priv,
188                                         struct v4l2_input *i)
189 {
190         if (i->index != 0)
191                 return -EINVAL;
192
193         i->type = V4L2_INPUT_TYPE_CAMERA;
194         strcpy(i->name, "CCIR656");
195
196         return 0;
197 }
198
199 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
200 {
201         *i = 0;
202         return 0;
203 }
204
205 static int empress_s_input(struct file *file, void *priv, unsigned int i)
206 {
207         if (i != 0)
208                 return -EINVAL;
209
210         return 0;
211 }
212
213 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
214                                         struct v4l2_fmtdesc *f)
215 {
216         if (f->index != 0)
217                 return -EINVAL;
218
219         strlcpy(f->description, "MPEG TS", sizeof(f->description));
220         f->pixelformat = V4L2_PIX_FMT_MPEG;
221
222         return 0;
223 }
224
225 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
226                                 struct v4l2_format *f)
227 {
228         struct saa7134_dev *dev = file->private_data;
229
230         saa_call_all(dev, video, g_fmt, f);
231
232         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
233         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
234
235         return 0;
236 }
237
238 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
239                                 struct v4l2_format *f)
240 {
241         struct saa7134_dev *dev = file->private_data;
242
243         saa_call_all(dev, video, s_fmt, f);
244
245         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
246         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
247
248         return 0;
249 }
250
251 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
252                                 struct v4l2_format *f)
253 {
254         struct saa7134_dev *dev = file->private_data;
255
256         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
257         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
258
259         return 0;
260 }
261
262 static int empress_reqbufs(struct file *file, void *priv,
263                                         struct v4l2_requestbuffers *p)
264 {
265         struct saa7134_dev *dev = file->private_data;
266
267         return videobuf_reqbufs(&dev->empress_tsq, p);
268 }
269
270 static int empress_querybuf(struct file *file, void *priv,
271                                         struct v4l2_buffer *b)
272 {
273         struct saa7134_dev *dev = file->private_data;
274
275         return videobuf_querybuf(&dev->empress_tsq, b);
276 }
277
278 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
279 {
280         struct saa7134_dev *dev = file->private_data;
281
282         return videobuf_qbuf(&dev->empress_tsq, b);
283 }
284
285 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
286 {
287         struct saa7134_dev *dev = file->private_data;
288
289         return videobuf_dqbuf(&dev->empress_tsq, b,
290                                 file->f_flags & O_NONBLOCK);
291 }
292
293 static int empress_streamon(struct file *file, void *priv,
294                                         enum v4l2_buf_type type)
295 {
296         struct saa7134_dev *dev = file->private_data;
297
298         return videobuf_streamon(&dev->empress_tsq);
299 }
300
301 static int empress_streamoff(struct file *file, void *priv,
302                                         enum v4l2_buf_type type)
303 {
304         struct saa7134_dev *dev = file->private_data;
305
306         return videobuf_streamoff(&dev->empress_tsq);
307 }
308
309 static int empress_s_ext_ctrls(struct file *file, void *priv,
310                                struct v4l2_ext_controls *ctrls)
311 {
312         struct saa7134_dev *dev = file->private_data;
313         int err;
314
315         /* count == 0 is abused in saa6752hs.c, so that special
316                 case is handled here explicitly. */
317         if (ctrls->count == 0)
318                 return 0;
319
320         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
321                 return -EINVAL;
322
323         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
324         ts_init_encoder(dev);
325
326         return err;
327 }
328
329 static int empress_g_ext_ctrls(struct file *file, void *priv,
330                                struct v4l2_ext_controls *ctrls)
331 {
332         struct saa7134_dev *dev = file->private_data;
333
334         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
335                 return -EINVAL;
336         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
337 }
338
339 static int empress_g_ctrl(struct file *file, void *priv,
340                                         struct v4l2_control *c)
341 {
342         struct saa7134_dev *dev = file->private_data;
343
344         return saa7134_g_ctrl_internal(dev, NULL, c);
345 }
346
347 static int empress_s_ctrl(struct file *file, void *priv,
348                                         struct v4l2_control *c)
349 {
350         struct saa7134_dev *dev = file->private_data;
351
352         return saa7134_s_ctrl_internal(dev, NULL, c);
353 }
354
355 static int empress_queryctrl(struct file *file, void *priv,
356                                         struct v4l2_queryctrl *c)
357 {
358         /* Must be sorted from low to high control ID! */
359         static const u32 user_ctrls[] = {
360                 V4L2_CID_USER_CLASS,
361                 V4L2_CID_BRIGHTNESS,
362                 V4L2_CID_CONTRAST,
363                 V4L2_CID_SATURATION,
364                 V4L2_CID_HUE,
365                 V4L2_CID_AUDIO_VOLUME,
366                 V4L2_CID_AUDIO_MUTE,
367                 V4L2_CID_HFLIP,
368                 0
369         };
370
371         /* Must be sorted from low to high control ID! */
372         static const u32 mpeg_ctrls[] = {
373                 V4L2_CID_MPEG_CLASS,
374                 V4L2_CID_MPEG_STREAM_TYPE,
375                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
376                 V4L2_CID_MPEG_AUDIO_ENCODING,
377                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
378                 V4L2_CID_MPEG_VIDEO_ENCODING,
379                 V4L2_CID_MPEG_VIDEO_ASPECT,
380                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
381                 V4L2_CID_MPEG_VIDEO_BITRATE,
382                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
383                 0
384         };
385         static const u32 *ctrl_classes[] = {
386                 user_ctrls,
387                 mpeg_ctrls,
388                 NULL
389         };
390         struct saa7134_dev *dev = file->private_data;
391
392         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
393         if (c->id == 0)
394                 return -EINVAL;
395         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
396                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
397         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
398                 return saa7134_queryctrl(file, priv, c);
399         return saa_call_empress(dev, core, queryctrl, c);
400 }
401
402 static int empress_querymenu(struct file *file, void *priv,
403                                         struct v4l2_querymenu *c)
404 {
405         struct saa7134_dev *dev = file->private_data;
406
407         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
408                 return -EINVAL;
409         return saa_call_empress(dev, core, querymenu, c);
410 }
411
412 static int empress_g_chip_ident(struct file *file, void *fh,
413                struct v4l2_dbg_chip_ident *chip)
414 {
415         struct saa7134_dev *dev = file->private_data;
416
417         chip->ident = V4L2_IDENT_NONE;
418         chip->revision = 0;
419         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
420             !strcmp(chip->match.name, "saa6752hs"))
421                 return saa_call_empress(dev, core, g_chip_ident, chip);
422         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
423                 return saa_call_empress(dev, core, g_chip_ident, chip);
424         return -EINVAL;
425 }
426
427 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
428 {
429         struct saa7134_dev *dev = file->private_data;
430
431         return saa7134_s_std_internal(dev, NULL, id);
432 }
433
434 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
435 {
436         struct saa7134_dev *dev = file->private_data;
437
438         *id = dev->tvnorm->id;
439         return 0;
440 }
441
442 static const struct v4l2_file_operations ts_fops =
443 {
444         .owner    = THIS_MODULE,
445         .open     = ts_open,
446         .release  = ts_release,
447         .read     = ts_read,
448         .poll     = ts_poll,
449         .mmap     = ts_mmap,
450         .ioctl    = video_ioctl2,
451 };
452
453 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
454         .vidioc_querycap                = empress_querycap,
455         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
456         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
457         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
458         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
459         .vidioc_reqbufs                 = empress_reqbufs,
460         .vidioc_querybuf                = empress_querybuf,
461         .vidioc_qbuf                    = empress_qbuf,
462         .vidioc_dqbuf                   = empress_dqbuf,
463         .vidioc_streamon                = empress_streamon,
464         .vidioc_streamoff               = empress_streamoff,
465         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
466         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
467         .vidioc_enum_input              = empress_enum_input,
468         .vidioc_g_input                 = empress_g_input,
469         .vidioc_s_input                 = empress_s_input,
470         .vidioc_queryctrl               = empress_queryctrl,
471         .vidioc_querymenu               = empress_querymenu,
472         .vidioc_g_ctrl                  = empress_g_ctrl,
473         .vidioc_s_ctrl                  = empress_s_ctrl,
474         .vidioc_g_chip_ident            = empress_g_chip_ident,
475         .vidioc_s_std                   = empress_s_std,
476         .vidioc_g_std                   = empress_g_std,
477 };
478
479 /* ----------------------------------------------------------- */
480
481 static struct video_device saa7134_empress_template = {
482         .name          = "saa7134-empress",
483         .fops          = &ts_fops,
484         .minor         = -1,
485         .ioctl_ops     = &ts_ioctl_ops,
486
487         .tvnorms                        = SAA7134_NORMS,
488         .current_norm                   = V4L2_STD_PAL,
489 };
490
491 static void empress_signal_update(struct work_struct *work)
492 {
493         struct saa7134_dev* dev =
494                 container_of(work, struct saa7134_dev, empress_workqueue);
495
496         if (dev->nosignal) {
497                 dprintk("no video signal\n");
498         } else {
499                 dprintk("video signal acquired\n");
500         }
501 }
502
503 static void empress_signal_change(struct saa7134_dev *dev)
504 {
505         schedule_work(&dev->empress_workqueue);
506 }
507
508
509 static int empress_init(struct saa7134_dev *dev)
510 {
511         int err;
512
513         dprintk("%s: %s\n",dev->name,__func__);
514         dev->empress_dev = video_device_alloc();
515         if (NULL == dev->empress_dev)
516                 return -ENOMEM;
517         *(dev->empress_dev) = saa7134_empress_template;
518         dev->empress_dev->parent  = &dev->pci->dev;
519         dev->empress_dev->release = video_device_release;
520         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
521                  "%s empress (%s)", dev->name,
522                  saa7134_boards[dev->board].name);
523
524         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
525
526         video_set_drvdata(dev->empress_dev, dev);
527         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
528                                     empress_nr[dev->nr]);
529         if (err < 0) {
530                 printk(KERN_INFO "%s: can't register video device\n",
531                        dev->name);
532                 video_device_release(dev->empress_dev);
533                 dev->empress_dev = NULL;
534                 return err;
535         }
536         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
537                dev->name, video_device_node_name(dev->empress_dev));
538
539         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
540                             &dev->pci->dev, &dev->slock,
541                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
542                             V4L2_FIELD_ALTERNATE,
543                             sizeof(struct saa7134_buf),
544                             dev);
545
546         empress_signal_update(&dev->empress_workqueue);
547         return 0;
548 }
549
550 static int empress_fini(struct saa7134_dev *dev)
551 {
552         dprintk("%s: %s\n",dev->name,__func__);
553
554         if (NULL == dev->empress_dev)
555                 return 0;
556         flush_scheduled_work();
557         video_unregister_device(dev->empress_dev);
558         dev->empress_dev = NULL;
559         return 0;
560 }
561
562 static struct saa7134_mpeg_ops empress_ops = {
563         .type          = SAA7134_MPEG_EMPRESS,
564         .init          = empress_init,
565         .fini          = empress_fini,
566         .signal_change = empress_signal_change,
567 };
568
569 static int __init empress_register(void)
570 {
571         return saa7134_ts_register(&empress_ops);
572 }
573
574 static void __exit empress_unregister(void)
575 {
576         saa7134_ts_unregister(&empress_ops);
577 }
578
579 module_init(empress_register);
580 module_exit(empress_unregister);
581
582 /* ----------------------------------------------------------- */
583 /*
584  * Local variables:
585  * c-basic-offset: 8
586  * End:
587  */