Merge branch 'linus' into x86/threadinfo
[linux-2.6] / 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;
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.vb_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.vb_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         videobuf_stop(&dev->empress_tsq);
114         videobuf_mmap_free(&dev->empress_tsq);
115         dev->empress_users--;
116
117         /* stop the encoder */
118         ts_reset_encoder(dev);
119
120         /* Mute audio */
121         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
122                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
123
124         return 0;
125 }
126
127 static ssize_t
128 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
129 {
130         struct saa7134_dev *dev = file->private_data;
131
132         if (!dev->empress_started)
133                 ts_init_encoder(dev);
134
135         return videobuf_read_stream(&dev->empress_tsq,
136                                     data, count, ppos, 0,
137                                     file->f_flags & O_NONBLOCK);
138 }
139
140 static unsigned int
141 ts_poll(struct file *file, struct poll_table_struct *wait)
142 {
143         struct saa7134_dev *dev = file->private_data;
144
145         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
146 }
147
148
149 static int
150 ts_mmap(struct file *file, struct vm_area_struct * vma)
151 {
152         struct saa7134_dev *dev = file->private_data;
153
154         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
155 }
156
157 /*
158  * This function is _not_ called directly, but from
159  * video_generic_ioctl (and maybe others).  userspace
160  * copying is done already, arg is a kernel pointer.
161  */
162
163 static int empress_querycap(struct file *file, void  *priv,
164                                         struct v4l2_capability *cap)
165 {
166         struct saa7134_dev *dev = file->private_data;
167
168         strcpy(cap->driver, "saa7134");
169         strlcpy(cap->card, saa7134_boards[dev->board].name,
170                 sizeof(cap->card));
171         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
172         cap->version = SAA7134_VERSION_CODE;
173         cap->capabilities =
174                 V4L2_CAP_VIDEO_CAPTURE |
175                 V4L2_CAP_READWRITE |
176                 V4L2_CAP_STREAMING;
177         return 0;
178 }
179
180 static int empress_enum_input(struct file *file, void *priv,
181                                         struct v4l2_input *i)
182 {
183         if (i->index != 0)
184                 return -EINVAL;
185
186         i->type = V4L2_INPUT_TYPE_CAMERA;
187         strcpy(i->name, "CCIR656");
188
189         return 0;
190 }
191
192 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
193 {
194         *i = 0;
195         return 0;
196 }
197
198 static int empress_s_input(struct file *file, void *priv, unsigned int i)
199 {
200         if (i != 0)
201                 return -EINVAL;
202
203         return 0;
204 }
205
206 static int empress_enum_fmt_cap(struct file *file, void  *priv,
207                                         struct v4l2_fmtdesc *f)
208 {
209         if (f->index != 0)
210                 return -EINVAL;
211
212         strlcpy(f->description, "MPEG TS", sizeof(f->description));
213         f->pixelformat = V4L2_PIX_FMT_MPEG;
214
215         return 0;
216 }
217
218 static int empress_g_fmt_cap(struct file *file, void *priv,
219                                 struct v4l2_format *f)
220 {
221         struct saa7134_fh *fh = priv;
222         struct saa7134_dev *dev = fh->dev;
223
224         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
225
226         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
227         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
228
229         return 0;
230 }
231
232 static int empress_s_fmt_cap(struct file *file, void *priv,
233                                 struct v4l2_format *f)
234 {
235         struct saa7134_fh *fh = priv;
236         struct saa7134_dev *dev = fh->dev;
237
238         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
239
240         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
241         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
242
243         return 0;
244 }
245
246
247 static int empress_reqbufs(struct file *file, void *priv,
248                                         struct v4l2_requestbuffers *p)
249 {
250         struct saa7134_fh *fh = priv;
251         struct saa7134_dev *dev = fh->dev;
252
253         return videobuf_reqbufs(&dev->empress_tsq, p);
254 }
255
256 static int empress_querybuf(struct file *file, void *priv,
257                                         struct v4l2_buffer *b)
258 {
259         struct saa7134_fh *fh = priv;
260         struct saa7134_dev *dev = fh->dev;
261
262         return videobuf_querybuf(&dev->empress_tsq, b);
263 }
264
265 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
266 {
267         struct saa7134_fh *fh = priv;
268         struct saa7134_dev *dev = fh->dev;
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_fh *fh = priv;
276         struct saa7134_dev *dev = fh->dev;
277
278         return videobuf_dqbuf(&dev->empress_tsq, b,
279                                 file->f_flags & O_NONBLOCK);
280 }
281
282 static int empress_streamon(struct file *file, void *priv,
283                                         enum v4l2_buf_type type)
284 {
285         struct saa7134_fh *fh = priv;
286         struct saa7134_dev *dev = fh->dev;
287
288         return videobuf_streamon(&dev->empress_tsq);
289 }
290
291 static int empress_streamoff(struct file *file, void *priv,
292                                         enum v4l2_buf_type type)
293 {
294         struct saa7134_fh *fh = priv;
295         struct saa7134_dev *dev = fh->dev;
296
297         return videobuf_streamoff(&dev->empress_tsq);
298 }
299
300 static int empress_s_ext_ctrls(struct file *file, void *priv,
301                                struct v4l2_ext_controls *ctrls)
302 {
303         struct saa7134_fh *fh = priv;
304         struct saa7134_dev *dev = fh->dev;
305
306         /* count == 0 is abused in saa6752hs.c, so that special
307                 case is handled here explicitly. */
308         if (ctrls->count == 0)
309                 return 0;
310
311         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
312                 return -EINVAL;
313
314         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
315         ts_init_encoder(dev);
316
317         return 0;
318 }
319
320 static int empress_g_ext_ctrls(struct file *file, void *priv,
321                                struct v4l2_ext_controls *ctrls)
322 {
323         struct saa7134_fh *fh = priv;
324         struct saa7134_dev *dev = fh->dev;
325
326         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
327                 return -EINVAL;
328         saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
329
330         return 0;
331 }
332
333 static const struct file_operations ts_fops =
334 {
335         .owner    = THIS_MODULE,
336         .open     = ts_open,
337         .release  = ts_release,
338         .read     = ts_read,
339         .poll     = ts_poll,
340         .mmap     = ts_mmap,
341         .ioctl    = video_ioctl2,
342         .llseek   = no_llseek,
343 };
344
345 /* ----------------------------------------------------------- */
346
347 static struct video_device saa7134_empress_template =
348 {
349         .name          = "saa7134-empress",
350         .type          = 0 /* FIXME */,
351         .type2         = 0 /* FIXME */,
352         .fops          = &ts_fops,
353         .minor         = -1,
354
355         .vidioc_querycap                = empress_querycap,
356         .vidioc_enum_fmt_cap            = empress_enum_fmt_cap,
357         .vidioc_s_fmt_cap               = empress_s_fmt_cap,
358         .vidioc_g_fmt_cap               = empress_g_fmt_cap,
359         .vidioc_reqbufs                 = empress_reqbufs,
360         .vidioc_querybuf                = empress_querybuf,
361         .vidioc_qbuf                    = empress_qbuf,
362         .vidioc_dqbuf                   = empress_dqbuf,
363         .vidioc_streamon                = empress_streamon,
364         .vidioc_streamoff               = empress_streamoff,
365         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
366         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
367         .vidioc_enum_input              = empress_enum_input,
368         .vidioc_g_input                 = empress_g_input,
369         .vidioc_s_input                 = empress_s_input,
370
371         .vidioc_queryctrl               = saa7134_queryctrl,
372         .vidioc_g_ctrl                  = saa7134_g_ctrl,
373         .vidioc_s_ctrl                  = saa7134_s_ctrl,
374
375         .tvnorms                        = SAA7134_NORMS,
376         .current_norm                   = V4L2_STD_PAL,
377 };
378
379 static void empress_signal_update(struct work_struct *work)
380 {
381         struct saa7134_dev* dev =
382                 container_of(work, struct saa7134_dev, empress_workqueue);
383
384         if (dev->nosignal) {
385                 dprintk("no video signal\n");
386                 ts_reset_encoder(dev);
387         } else {
388                 dprintk("video signal acquired\n");
389                 if (dev->empress_users)
390                         ts_init_encoder(dev);
391         }
392 }
393
394 static void empress_signal_change(struct saa7134_dev *dev)
395 {
396         schedule_work(&dev->empress_workqueue);
397 }
398
399
400 static int empress_init(struct saa7134_dev *dev)
401 {
402         int err;
403
404         dprintk("%s: %s\n",dev->name,__func__);
405         dev->empress_dev = video_device_alloc();
406         if (NULL == dev->empress_dev)
407                 return -ENOMEM;
408         *(dev->empress_dev) = saa7134_empress_template;
409         dev->empress_dev->dev     = &dev->pci->dev;
410         dev->empress_dev->release = video_device_release;
411         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
412                  "%s empress (%s)", dev->name,
413                  saa7134_boards[dev->board].name);
414
415         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
416
417         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
418                                     empress_nr[dev->nr]);
419         if (err < 0) {
420                 printk(KERN_INFO "%s: can't register video device\n",
421                        dev->name);
422                 video_device_release(dev->empress_dev);
423                 dev->empress_dev = NULL;
424                 return err;
425         }
426         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
427                dev->name,dev->empress_dev->minor & 0x1f);
428
429         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
430                             &dev->pci->dev, &dev->slock,
431                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
432                             V4L2_FIELD_ALTERNATE,
433                             sizeof(struct saa7134_buf),
434                             dev);
435
436         empress_signal_update(&dev->empress_workqueue);
437         return 0;
438 }
439
440 static int empress_fini(struct saa7134_dev *dev)
441 {
442         dprintk("%s: %s\n",dev->name,__func__);
443
444         if (NULL == dev->empress_dev)
445                 return 0;
446         flush_scheduled_work();
447         video_unregister_device(dev->empress_dev);
448         dev->empress_dev = NULL;
449         return 0;
450 }
451
452 static struct saa7134_mpeg_ops empress_ops = {
453         .type          = SAA7134_MPEG_EMPRESS,
454         .init          = empress_init,
455         .fini          = empress_fini,
456         .signal_change = empress_signal_change,
457 };
458
459 static int __init empress_register(void)
460 {
461         return saa7134_ts_register(&empress_ops);
462 }
463
464 static void __exit empress_unregister(void)
465 {
466         saa7134_ts_unregister(&empress_ops);
467 }
468
469 module_init(empress_register);
470 module_exit(empress_unregister);
471
472 /* ----------------------------------------------------------- */
473 /*
474  * Local variables:
475  * c-basic-offset: 8
476  * End:
477  */