V4L/DVB (6321): Remove obsolete VIDIOC_S/G_MPEGCOMP ioctls
[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
33 /* ------------------------------------------------------------------ */
34
35 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
36 MODULE_LICENSE("GPL");
37
38 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
39
40 module_param_array(empress_nr, int, NULL, 0444);
41 MODULE_PARM_DESC(empress_nr,"ts device number");
42
43 static unsigned int debug = 0;
44 module_param(debug, int, 0644);
45 MODULE_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
52 static 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
64 static int ts_init_encoder(struct saa7134_dev* dev)
65 {
66         struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
67
68         ts_reset_encoder(dev);
69         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
70         dev->empress_started = 1;
71         return 0;
72 }
73
74 /* ------------------------------------------------------------------ */
75
76 static int ts_open(struct inode *inode, struct file *file)
77 {
78         int minor = iminor(inode);
79         struct saa7134_dev *dev;
80         int err;
81
82         list_for_each_entry(dev, &saa7134_devlist, devlist)
83                 if (dev->empress_dev && dev->empress_dev->minor == minor)
84                         goto found;
85         return -ENODEV;
86  found:
87
88         dprintk("open minor=%d\n",minor);
89         err = -EBUSY;
90         if (!mutex_trylock(&dev->empress_tsq.lock))
91                 goto done;
92         if (dev->empress_users)
93                 goto done_up;
94
95         /* Unmute audio */
96         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
97                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
98
99         dev->empress_users++;
100         file->private_data = dev;
101         err = 0;
102
103 done_up:
104         mutex_unlock(&dev->empress_tsq.lock);
105 done:
106         return err;
107 }
108
109 static int ts_release(struct inode *inode, struct file *file)
110 {
111         struct saa7134_dev *dev = file->private_data;
112
113         if (dev->empress_tsq.streaming)
114                 videobuf_streamoff(&dev->empress_tsq);
115         mutex_lock(&dev->empress_tsq.lock);
116         if (dev->empress_tsq.reading)
117                 videobuf_read_stop(&dev->empress_tsq);
118         videobuf_mmap_free(&dev->empress_tsq);
119         dev->empress_users--;
120
121         /* stop the encoder */
122         ts_reset_encoder(dev);
123
124         /* Mute audio */
125         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
126                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
127
128         mutex_unlock(&dev->empress_tsq.lock);
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 static int ts_do_ioctl(struct inode *inode, struct file *file,
168                        unsigned int cmd, void *arg)
169 {
170         struct saa7134_dev *dev = file->private_data;
171         struct v4l2_ext_controls *ctrls = arg;
172
173         if (debug > 1)
174                 v4l_print_ioctl(dev->name,cmd);
175         switch (cmd) {
176         case VIDIOC_QUERYCAP:
177         {
178                 struct v4l2_capability *cap = arg;
179
180                 memset(cap,0,sizeof(*cap));
181                 strcpy(cap->driver, "saa7134");
182                 strlcpy(cap->card, saa7134_boards[dev->board].name,
183                         sizeof(cap->card));
184                 sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
185                 cap->version = SAA7134_VERSION_CODE;
186                 cap->capabilities =
187                         V4L2_CAP_VIDEO_CAPTURE |
188                         V4L2_CAP_READWRITE |
189                         V4L2_CAP_STREAMING;
190                 return 0;
191         }
192
193         /* --- input switching --------------------------------------- */
194         case VIDIOC_ENUMINPUT:
195         {
196                 struct v4l2_input *i = arg;
197
198                 if (i->index != 0)
199                         return -EINVAL;
200                 i->type = V4L2_INPUT_TYPE_CAMERA;
201                 strcpy(i->name,"CCIR656");
202                 return 0;
203         }
204         case VIDIOC_G_INPUT:
205         {
206                 int *i = arg;
207                 *i = 0;
208                 return 0;
209         }
210         case VIDIOC_S_INPUT:
211         {
212                 int *i = arg;
213
214                 if (*i != 0)
215                         return -EINVAL;
216                 return 0;
217         }
218         /* --- capture ioctls ---------------------------------------- */
219
220         case VIDIOC_ENUM_FMT:
221         {
222                 struct v4l2_fmtdesc *f = arg;
223                 int index;
224
225                 index = f->index;
226                 if (index != 0)
227                         return -EINVAL;
228
229                 memset(f,0,sizeof(*f));
230                 f->index = index;
231                 strlcpy(f->description, "MPEG TS", sizeof(f->description));
232                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
233                 f->pixelformat = V4L2_PIX_FMT_MPEG;
234                 return 0;
235         }
236
237         case VIDIOC_G_FMT:
238         {
239                 struct v4l2_format *f = arg;
240
241                 memset(f,0,sizeof(*f));
242                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
243
244                 saa7134_i2c_call_clients(dev, cmd, arg);
245                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
246                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
247                 return 0;
248         }
249
250         case VIDIOC_S_FMT:
251         {
252                 struct v4l2_format *f = arg;
253
254                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
255                     return -EINVAL;
256
257                 saa7134_i2c_call_clients(dev, cmd, arg);
258                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
259                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE* dev->ts.nr_packets;
260                 return 0;
261         }
262
263         case VIDIOC_REQBUFS:
264                 return videobuf_reqbufs(&dev->empress_tsq,arg);
265
266         case VIDIOC_QUERYBUF:
267                 return videobuf_querybuf(&dev->empress_tsq,arg);
268
269         case VIDIOC_QBUF:
270                 return videobuf_qbuf(&dev->empress_tsq,arg);
271
272         case VIDIOC_DQBUF:
273                 return videobuf_dqbuf(&dev->empress_tsq,arg,
274                                       file->f_flags & O_NONBLOCK);
275
276         case VIDIOC_STREAMON:
277                 return videobuf_streamon(&dev->empress_tsq);
278
279         case VIDIOC_STREAMOFF:
280                 return videobuf_streamoff(&dev->empress_tsq);
281
282         case VIDIOC_QUERYCTRL:
283         case VIDIOC_G_CTRL:
284         case VIDIOC_S_CTRL:
285                 return saa7134_common_ioctl(dev, cmd, arg);
286
287         case VIDIOC_S_EXT_CTRLS:
288                 /* count == 0 is abused in saa6752hs.c, so that special
289                    case is handled here explicitly. */
290                 if (ctrls->count == 0)
291                         return 0;
292                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
293                         return -EINVAL;
294                 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
295                 ts_init_encoder(dev);
296                 return 0;
297         case VIDIOC_G_EXT_CTRLS:
298                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
299                         return -EINVAL;
300                 saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
301                 return 0;
302
303         default:
304                 return -ENOIOCTLCMD;
305         }
306         return 0;
307 }
308
309 static int ts_ioctl(struct inode *inode, struct file *file,
310                      unsigned int cmd, unsigned long arg)
311 {
312         return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
313 }
314
315 static const struct file_operations ts_fops =
316 {
317         .owner    = THIS_MODULE,
318         .open     = ts_open,
319         .release  = ts_release,
320         .read     = ts_read,
321         .poll     = ts_poll,
322         .mmap     = ts_mmap,
323         .ioctl    = ts_ioctl,
324         .llseek   = no_llseek,
325 };
326
327 /* ----------------------------------------------------------- */
328
329 static struct video_device saa7134_empress_template =
330 {
331         .name          = "saa7134-empress",
332         .type          = 0 /* FIXME */,
333         .type2         = 0 /* FIXME */,
334         .fops          = &ts_fops,
335         .minor         = -1,
336 };
337
338 static void empress_signal_update(struct work_struct *work)
339 {
340         struct saa7134_dev* dev =
341                 container_of(work, struct saa7134_dev, empress_workqueue);
342
343         if (dev->nosignal) {
344                 dprintk("no video signal\n");
345                 ts_reset_encoder(dev);
346         } else {
347                 dprintk("video signal acquired\n");
348                 if (dev->empress_users)
349                         ts_init_encoder(dev);
350         }
351 }
352
353 static void empress_signal_change(struct saa7134_dev *dev)
354 {
355         schedule_work(&dev->empress_workqueue);
356 }
357
358
359 static int empress_init(struct saa7134_dev *dev)
360 {
361         int err;
362
363         dprintk("%s: %s\n",dev->name,__FUNCTION__);
364         dev->empress_dev = video_device_alloc();
365         if (NULL == dev->empress_dev)
366                 return -ENOMEM;
367         *(dev->empress_dev) = saa7134_empress_template;
368         dev->empress_dev->dev     = &dev->pci->dev;
369         dev->empress_dev->release = video_device_release;
370         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
371                  "%s empress (%s)", dev->name,
372                  saa7134_boards[dev->board].name);
373
374         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
375
376         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
377                                     empress_nr[dev->nr]);
378         if (err < 0) {
379                 printk(KERN_INFO "%s: can't register video device\n",
380                        dev->name);
381                 video_device_release(dev->empress_dev);
382                 dev->empress_dev = NULL;
383                 return err;
384         }
385         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
386                dev->name,dev->empress_dev->minor & 0x1f);
387
388         videobuf_queue_pci_init(&dev->empress_tsq, &saa7134_ts_qops,
389                             dev->pci, &dev->slock,
390                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
391                             V4L2_FIELD_ALTERNATE,
392                             sizeof(struct saa7134_buf),
393                             dev);
394
395         empress_signal_update(&dev->empress_workqueue);
396         return 0;
397 }
398
399 static int empress_fini(struct saa7134_dev *dev)
400 {
401         dprintk("%s: %s\n",dev->name,__FUNCTION__);
402
403         if (NULL == dev->empress_dev)
404                 return 0;
405         flush_scheduled_work();
406         video_unregister_device(dev->empress_dev);
407         dev->empress_dev = NULL;
408         return 0;
409 }
410
411 static struct saa7134_mpeg_ops empress_ops = {
412         .type          = SAA7134_MPEG_EMPRESS,
413         .init          = empress_init,
414         .fini          = empress_fini,
415         .signal_change = empress_signal_change,
416 };
417
418 static int __init empress_register(void)
419 {
420         return saa7134_ts_register(&empress_ops);
421 }
422
423 static void __exit empress_unregister(void)
424 {
425         saa7134_ts_unregister(&empress_ops);
426 }
427
428 module_init(empress_register);
429 module_exit(empress_unregister);
430
431 /* ----------------------------------------------------------- */
432 /*
433  * Local variables:
434  * c-basic-offset: 8
435  * End:
436  */