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1da177e4 LT |
1 | /* |
2 | * $Id: saa7134-empress.c,v 1.10 2005/02/03 10:24:33 kraxel Exp $ | |
3 | * | |
4 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/list.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/delay.h> | |
28 | ||
29 | #include "saa7134-reg.h" | |
30 | #include "saa7134.h" | |
31 | ||
32 | #include <media/saa6752hs.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 | 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 | ts_reset_encoder(dev); | |
67 | saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL); | |
68 | dev->empress_started = 1; | |
69 | return 0; | |
70 | } | |
71 | ||
72 | /* ------------------------------------------------------------------ */ | |
73 | ||
74 | static int ts_open(struct inode *inode, struct file *file) | |
75 | { | |
76 | int minor = iminor(inode); | |
77 | struct saa7134_dev *h,*dev = NULL; | |
78 | struct list_head *list; | |
79 | int err; | |
80 | ||
81 | list_for_each(list,&saa7134_devlist) { | |
82 | h = list_entry(list, struct saa7134_dev, devlist); | |
83 | if (h->empress_dev && h->empress_dev->minor == minor) | |
84 | dev = h; | |
85 | } | |
86 | if (NULL == dev) | |
87 | return -ENODEV; | |
88 | ||
89 | dprintk("open minor=%d\n",minor); | |
90 | err = -EBUSY; | |
91 | if (down_trylock(&dev->empress_tsq.lock)) | |
92 | goto done; | |
93 | if (dev->empress_users) | |
94 | goto done_up; | |
95 | ||
96 | dev->empress_users++; | |
97 | file->private_data = dev; | |
98 | err = 0; | |
99 | ||
100 | done_up: | |
101 | up(&dev->empress_tsq.lock); | |
102 | done: | |
103 | return err; | |
104 | } | |
105 | ||
106 | static int ts_release(struct inode *inode, struct file *file) | |
107 | { | |
108 | struct saa7134_dev *dev = file->private_data; | |
109 | ||
110 | if (dev->empress_tsq.streaming) | |
111 | videobuf_streamoff(&dev->empress_tsq); | |
112 | down(&dev->empress_tsq.lock); | |
113 | if (dev->empress_tsq.reading) | |
114 | videobuf_read_stop(&dev->empress_tsq); | |
115 | videobuf_mmap_free(&dev->empress_tsq); | |
116 | dev->empress_users--; | |
117 | ||
118 | /* stop the encoder */ | |
119 | ts_reset_encoder(dev); | |
120 | ||
121 | up(&dev->empress_tsq.lock); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static ssize_t | |
126 | ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos) | |
127 | { | |
128 | struct saa7134_dev *dev = file->private_data; | |
129 | ||
130 | if (!dev->empress_started) | |
131 | ts_init_encoder(dev); | |
132 | ||
133 | return videobuf_read_stream(&dev->empress_tsq, | |
134 | data, count, ppos, 0, | |
135 | file->f_flags & O_NONBLOCK); | |
136 | } | |
137 | ||
138 | static unsigned int | |
139 | ts_poll(struct file *file, struct poll_table_struct *wait) | |
140 | { | |
141 | struct saa7134_dev *dev = file->private_data; | |
142 | ||
143 | return videobuf_poll_stream(file, &dev->empress_tsq, wait); | |
144 | } | |
145 | ||
146 | ||
147 | static int | |
148 | ts_mmap(struct file *file, struct vm_area_struct * vma) | |
149 | { | |
150 | struct saa7134_dev *dev = file->private_data; | |
151 | ||
152 | return videobuf_mmap_mapper(&dev->empress_tsq, vma); | |
153 | } | |
154 | ||
155 | /* | |
156 | * This function is _not_ called directly, but from | |
157 | * video_generic_ioctl (and maybe others). userspace | |
158 | * copying is done already, arg is a kernel pointer. | |
159 | */ | |
160 | static int ts_do_ioctl(struct inode *inode, struct file *file, | |
161 | unsigned int cmd, void *arg) | |
162 | { | |
163 | struct saa7134_dev *dev = file->private_data; | |
164 | ||
165 | if (debug > 1) | |
166 | saa7134_print_ioctl(dev->name,cmd); | |
167 | switch (cmd) { | |
168 | case VIDIOC_QUERYCAP: | |
169 | { | |
170 | struct v4l2_capability *cap = arg; | |
171 | ||
172 | memset(cap,0,sizeof(*cap)); | |
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 | /* --- input switching --------------------------------------- */ | |
186 | case VIDIOC_ENUMINPUT: | |
187 | { | |
188 | struct v4l2_input *i = arg; | |
189 | ||
190 | if (i->index != 0) | |
191 | return -EINVAL; | |
192 | i->type = V4L2_INPUT_TYPE_CAMERA; | |
193 | strcpy(i->name,"CCIR656"); | |
194 | return 0; | |
195 | } | |
196 | case VIDIOC_G_INPUT: | |
197 | { | |
198 | int *i = arg; | |
199 | *i = 0; | |
200 | return 0; | |
201 | } | |
202 | case VIDIOC_S_INPUT: | |
203 | { | |
204 | int *i = arg; | |
205 | ||
206 | if (*i != 0) | |
207 | return -EINVAL; | |
208 | return 0; | |
209 | } | |
210 | /* --- capture ioctls ---------------------------------------- */ | |
211 | ||
212 | case VIDIOC_ENUM_FMT: | |
213 | { | |
214 | struct v4l2_fmtdesc *f = arg; | |
215 | int index; | |
216 | ||
217 | index = f->index; | |
218 | if (index != 0) | |
219 | return -EINVAL; | |
220 | ||
221 | memset(f,0,sizeof(*f)); | |
222 | f->index = index; | |
223 | strlcpy(f->description, "MPEG TS", sizeof(f->description)); | |
224 | f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
225 | f->pixelformat = V4L2_PIX_FMT_MPEG; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | case VIDIOC_G_FMT: | |
230 | { | |
231 | struct v4l2_format *f = arg; | |
232 | ||
233 | memset(f,0,sizeof(*f)); | |
234 | f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
235 | ||
236 | /* FIXME: translate subsampling type EMPRESS into | |
237 | * width/height: */ | |
238 | f->fmt.pix.width = 720; /* D1 */ | |
239 | f->fmt.pix.height = 576; | |
240 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; | |
241 | f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; | |
242 | return 0; | |
243 | } | |
244 | ||
245 | case VIDIOC_S_FMT: | |
246 | { | |
247 | struct v4l2_format *f = arg; | |
248 | ||
249 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
250 | return -EINVAL; | |
251 | ||
252 | /* | |
253 | FIXME: translate and round width/height into EMPRESS | |
254 | subsample type: | |
255 | ||
256 | type | PAL | NTSC | |
257 | --------------------------- | |
258 | SIF | 352x288 | 352x240 | |
259 | 1/2 D1 | 352x576 | 352x480 | |
260 | 2/3 D1 | 480x576 | 480x480 | |
261 | D1 | 720x576 | 720x480 | |
262 | */ | |
263 | ||
264 | f->fmt.pix.width = 720; /* D1 */ | |
265 | f->fmt.pix.height = 576; | |
266 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; | |
267 | f->fmt.pix.sizeimage = TS_PACKET_SIZE* dev->ts.nr_packets; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | case VIDIOC_REQBUFS: | |
272 | return videobuf_reqbufs(&dev->empress_tsq,arg); | |
273 | ||
274 | case VIDIOC_QUERYBUF: | |
275 | return videobuf_querybuf(&dev->empress_tsq,arg); | |
276 | ||
277 | case VIDIOC_QBUF: | |
278 | return videobuf_qbuf(&dev->empress_tsq,arg); | |
279 | ||
280 | case VIDIOC_DQBUF: | |
281 | return videobuf_dqbuf(&dev->empress_tsq,arg, | |
282 | file->f_flags & O_NONBLOCK); | |
283 | ||
284 | case VIDIOC_STREAMON: | |
285 | return videobuf_streamon(&dev->empress_tsq); | |
286 | ||
287 | case VIDIOC_STREAMOFF: | |
288 | return videobuf_streamoff(&dev->empress_tsq); | |
289 | ||
290 | case VIDIOC_QUERYCTRL: | |
291 | case VIDIOC_G_CTRL: | |
292 | case VIDIOC_S_CTRL: | |
293 | return saa7134_common_ioctl(dev, cmd, arg); | |
294 | ||
295 | case VIDIOC_S_MPEGCOMP: | |
296 | saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg); | |
297 | ts_init_encoder(dev); | |
298 | return 0; | |
299 | case VIDIOC_G_MPEGCOMP: | |
300 | saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, 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 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 | .hardware = 0, | |
335 | .fops = &ts_fops, | |
336 | .minor = -1, | |
337 | }; | |
338 | ||
339 | static void empress_signal_update(void* data) | |
340 | { | |
341 | struct saa7134_dev* dev = (struct saa7134_dev*) data; | |
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, (void*) dev); | |
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_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); | |
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 | */ |