WorkStruct: make allyesconfig
[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/moduleparam.h>
24 #include <linux/kernel.h>
25 #include <linux/slab.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
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 = 0;
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 *h,*dev = NULL;
81         struct list_head *list;
82         int err;
83
84         list_for_each(list,&saa7134_devlist) {
85                 h = list_entry(list, struct saa7134_dev, devlist);
86                 if (h->empress_dev && h->empress_dev->minor == minor)
87                         dev = h;
88         }
89         if (NULL == dev)
90                 return -ENODEV;
91
92         dprintk("open minor=%d\n",minor);
93         err = -EBUSY;
94         if (!mutex_trylock(&dev->empress_tsq.lock))
95                 goto done;
96         if (dev->empress_users)
97                 goto done_up;
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         mutex_unlock(&dev->empress_tsq.lock);
125         return 0;
126 }
127
128 static ssize_t
129 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
130 {
131         struct saa7134_dev *dev = file->private_data;
132
133         if (!dev->empress_started)
134                 ts_init_encoder(dev);
135
136         return videobuf_read_stream(&dev->empress_tsq,
137                                     data, count, ppos, 0,
138                                     file->f_flags & O_NONBLOCK);
139 }
140
141 static unsigned int
142 ts_poll(struct file *file, struct poll_table_struct *wait)
143 {
144         struct saa7134_dev *dev = file->private_data;
145
146         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
147 }
148
149
150 static int
151 ts_mmap(struct file *file, struct vm_area_struct * vma)
152 {
153         struct saa7134_dev *dev = file->private_data;
154
155         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
156 }
157
158 /*
159  * This function is _not_ called directly, but from
160  * video_generic_ioctl (and maybe others).  userspace
161  * copying is done already, arg is a kernel pointer.
162  */
163 static int ts_do_ioctl(struct inode *inode, struct file *file,
164                        unsigned int cmd, void *arg)
165 {
166         struct saa7134_dev *dev = file->private_data;
167         struct v4l2_ext_controls *ctrls = arg;
168
169         if (debug > 1)
170                 v4l_print_ioctl(dev->name,cmd);
171         switch (cmd) {
172         case VIDIOC_QUERYCAP:
173         {
174                 struct v4l2_capability *cap = arg;
175
176                 memset(cap,0,sizeof(*cap));
177                 strcpy(cap->driver, "saa7134");
178                 strlcpy(cap->card, saa7134_boards[dev->board].name,
179                         sizeof(cap->card));
180                 sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
181                 cap->version = SAA7134_VERSION_CODE;
182                 cap->capabilities =
183                         V4L2_CAP_VIDEO_CAPTURE |
184                         V4L2_CAP_READWRITE |
185                         V4L2_CAP_STREAMING;
186                 return 0;
187         }
188
189         /* --- input switching --------------------------------------- */
190         case VIDIOC_ENUMINPUT:
191         {
192                 struct v4l2_input *i = arg;
193
194                 if (i->index != 0)
195                         return -EINVAL;
196                 i->type = V4L2_INPUT_TYPE_CAMERA;
197                 strcpy(i->name,"CCIR656");
198                 return 0;
199         }
200         case VIDIOC_G_INPUT:
201         {
202                 int *i = arg;
203                 *i = 0;
204                 return 0;
205         }
206         case VIDIOC_S_INPUT:
207         {
208                 int *i = arg;
209
210                 if (*i != 0)
211                         return -EINVAL;
212                 return 0;
213         }
214         /* --- capture ioctls ---------------------------------------- */
215
216         case VIDIOC_ENUM_FMT:
217         {
218                 struct v4l2_fmtdesc *f = arg;
219                 int index;
220
221                 index = f->index;
222                 if (index != 0)
223                         return -EINVAL;
224
225                 memset(f,0,sizeof(*f));
226                 f->index = index;
227                 strlcpy(f->description, "MPEG TS", sizeof(f->description));
228                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
229                 f->pixelformat = V4L2_PIX_FMT_MPEG;
230                 return 0;
231         }
232
233         case VIDIOC_G_FMT:
234         {
235                 struct v4l2_format *f = arg;
236
237                 memset(f,0,sizeof(*f));
238                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
239
240                 saa7134_i2c_call_clients(dev, cmd, arg);
241                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
242                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
243                 return 0;
244         }
245
246         case VIDIOC_S_FMT:
247         {
248                 struct v4l2_format *f = arg;
249
250                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
251                     return -EINVAL;
252
253                 saa7134_i2c_call_clients(dev, cmd, arg);
254                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
255                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE* dev->ts.nr_packets;
256                 return 0;
257         }
258
259         case VIDIOC_REQBUFS:
260                 return videobuf_reqbufs(&dev->empress_tsq,arg);
261
262         case VIDIOC_QUERYBUF:
263                 return videobuf_querybuf(&dev->empress_tsq,arg);
264
265         case VIDIOC_QBUF:
266                 return videobuf_qbuf(&dev->empress_tsq,arg);
267
268         case VIDIOC_DQBUF:
269                 return videobuf_dqbuf(&dev->empress_tsq,arg,
270                                       file->f_flags & O_NONBLOCK);
271
272         case VIDIOC_STREAMON:
273                 return videobuf_streamon(&dev->empress_tsq);
274
275         case VIDIOC_STREAMOFF:
276                 return videobuf_streamoff(&dev->empress_tsq);
277
278         case VIDIOC_QUERYCTRL:
279         case VIDIOC_G_CTRL:
280         case VIDIOC_S_CTRL:
281                 return saa7134_common_ioctl(dev, cmd, arg);
282
283         case VIDIOC_S_MPEGCOMP:
284                 printk(KERN_WARNING "VIDIOC_S_MPEGCOMP is obsolete. "
285                                     "Replace with VIDIOC_S_EXT_CTRLS!");
286                 saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
287                 ts_init_encoder(dev);
288                 return 0;
289         case VIDIOC_G_MPEGCOMP:
290                 printk(KERN_WARNING "VIDIOC_G_MPEGCOMP is obsolete. "
291                                     "Replace with VIDIOC_G_EXT_CTRLS!");
292                 saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
293                 return 0;
294         case VIDIOC_S_EXT_CTRLS:
295                 /* count == 0 is abused in saa6752hs.c, so that special
296                    case is handled here explicitly. */
297                 if (ctrls->count == 0)
298                         return 0;
299                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
300                         return -EINVAL;
301                 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
302                 ts_init_encoder(dev);
303                 return 0;
304         case VIDIOC_G_EXT_CTRLS:
305                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
306                         return -EINVAL;
307                 saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
308                 return 0;
309
310         default:
311                 return -ENOIOCTLCMD;
312         }
313         return 0;
314 }
315
316 static int ts_ioctl(struct inode *inode, struct file *file,
317                      unsigned int cmd, unsigned long arg)
318 {
319         return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
320 }
321
322 static struct file_operations ts_fops =
323 {
324         .owner    = THIS_MODULE,
325         .open     = ts_open,
326         .release  = ts_release,
327         .read     = ts_read,
328         .poll     = ts_poll,
329         .mmap     = ts_mmap,
330         .ioctl    = ts_ioctl,
331         .llseek   = no_llseek,
332 };
333
334 /* ----------------------------------------------------------- */
335
336 static struct video_device saa7134_empress_template =
337 {
338         .name          = "saa7134-empress",
339         .type          = 0 /* FIXME */,
340         .type2         = 0 /* FIXME */,
341         .hardware      = 0,
342         .fops          = &ts_fops,
343         .minor         = -1,
344 };
345
346 static void empress_signal_update(struct work_struct *work)
347 {
348         struct saa7134_dev* dev =
349                 container_of(work, struct saa7134_dev, empress_workqueue);
350
351         if (dev->nosignal) {
352                 dprintk("no video signal\n");
353                 ts_reset_encoder(dev);
354         } else {
355                 dprintk("video signal acquired\n");
356                 if (dev->empress_users)
357                         ts_init_encoder(dev);
358         }
359 }
360
361 static void empress_signal_change(struct saa7134_dev *dev)
362 {
363         schedule_work(&dev->empress_workqueue);
364 }
365
366
367 static int empress_init(struct saa7134_dev *dev)
368 {
369         int err;
370
371         dprintk("%s: %s\n",dev->name,__FUNCTION__);
372         dev->empress_dev = video_device_alloc();
373         if (NULL == dev->empress_dev)
374                 return -ENOMEM;
375         *(dev->empress_dev) = saa7134_empress_template;
376         dev->empress_dev->dev     = &dev->pci->dev;
377         dev->empress_dev->release = video_device_release;
378         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
379                  "%s empress (%s)", dev->name,
380                  saa7134_boards[dev->board].name);
381
382         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
383
384         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
385                                     empress_nr[dev->nr]);
386         if (err < 0) {
387                 printk(KERN_INFO "%s: can't register video device\n",
388                        dev->name);
389                 video_device_release(dev->empress_dev);
390                 dev->empress_dev = NULL;
391                 return err;
392         }
393         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
394                dev->name,dev->empress_dev->minor & 0x1f);
395
396         videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
397                             dev->pci, &dev->slock,
398                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
399                             V4L2_FIELD_ALTERNATE,
400                             sizeof(struct saa7134_buf),
401                             dev);
402
403         empress_signal_update(&dev->empress_workqueue);
404         return 0;
405 }
406
407 static int empress_fini(struct saa7134_dev *dev)
408 {
409         dprintk("%s: %s\n",dev->name,__FUNCTION__);
410
411         if (NULL == dev->empress_dev)
412                 return 0;
413         flush_scheduled_work();
414         video_unregister_device(dev->empress_dev);
415         dev->empress_dev = NULL;
416         return 0;
417 }
418
419 static struct saa7134_mpeg_ops empress_ops = {
420         .type          = SAA7134_MPEG_EMPRESS,
421         .init          = empress_init,
422         .fini          = empress_fini,
423         .signal_change = empress_signal_change,
424 };
425
426 static int __init empress_register(void)
427 {
428         return saa7134_ts_register(&empress_ops);
429 }
430
431 static void __exit empress_unregister(void)
432 {
433         saa7134_ts_unregister(&empress_ops);
434 }
435
436 module_init(empress_register);
437 module_exit(empress_unregister);
438
439 /* ----------------------------------------------------------- */
440 /*
441  * Local variables:
442  * c-basic-offset: 8
443  * End:
444  */