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1 | /* | |
2 | em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB | |
3 | video capture devices | |
4 | ||
5 | Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> | |
6 | Markus Rechberger <mrechberger@gmail.com> | |
7 | Mauro Carvalho Chehab <mchehab@infradead.org> | |
8 | Sascha Sommer <saschasommer@freenet.de> | |
9 | ||
10 | Some parts based on SN9C10x PC Camera Controllers GPL driver made | |
11 | by Luca Risolia <luca.risolia@studio.unibo.it> | |
12 | ||
13 | This program is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | This program is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with this program; if not, write to the Free Software | |
25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/init.h> | |
29 | #include <linux/list.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/bitmap.h> | |
33 | #include <linux/usb.h> | |
34 | #include <linux/i2c.h> | |
35 | #include <linux/version.h> | |
36 | #include <linux/mm.h> | |
37 | #include <linux/mutex.h> | |
38 | ||
39 | #include "em28xx.h" | |
40 | #include <media/v4l2-common.h> | |
41 | #include <media/msp3400.h> | |
42 | #include <media/tuner.h> | |
43 | ||
44 | #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ | |
45 | "Markus Rechberger <mrechberger@gmail.com>, " \ | |
46 | "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ | |
47 | "Sascha Sommer <saschasommer@freenet.de>" | |
48 | ||
49 | #define DRIVER_NAME "em28xx" | |
50 | #define DRIVER_DESC "Empia em28xx based USB video device driver" | |
51 | #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0) | |
52 | ||
53 | #define em28xx_videodbg(fmt, arg...) do {\ | |
54 | if (video_debug) \ | |
55 | printk(KERN_INFO "%s %s :"fmt, \ | |
56 | dev->name, __func__ , ##arg); } while (0) | |
57 | ||
58 | static unsigned int isoc_debug; | |
59 | module_param(isoc_debug, int, 0644); | |
60 | MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); | |
61 | ||
62 | #define em28xx_isocdbg(fmt, arg...) \ | |
63 | do {\ | |
64 | if (isoc_debug) { \ | |
65 | printk(KERN_INFO "%s %s :"fmt, \ | |
66 | dev->name, __func__ , ##arg); \ | |
67 | } \ | |
68 | } while (0) | |
69 | ||
70 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
71 | MODULE_DESCRIPTION(DRIVER_DESC); | |
72 | MODULE_LICENSE("GPL"); | |
73 | ||
74 | static LIST_HEAD(em28xx_devlist); | |
75 | ||
76 | static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; | |
77 | static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; | |
78 | static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; | |
79 | static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; | |
80 | ||
81 | module_param_array(card, int, NULL, 0444); | |
82 | module_param_array(video_nr, int, NULL, 0444); | |
83 | module_param_array(vbi_nr, int, NULL, 0444); | |
84 | module_param_array(radio_nr, int, NULL, 0444); | |
85 | MODULE_PARM_DESC(card, "card type"); | |
86 | MODULE_PARM_DESC(video_nr, "video device numbers"); | |
87 | MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); | |
88 | MODULE_PARM_DESC(radio_nr, "radio device numbers"); | |
89 | ||
90 | static unsigned int video_debug; | |
91 | module_param(video_debug, int, 0644); | |
92 | MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); | |
93 | ||
94 | /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ | |
95 | static unsigned long em28xx_devused; | |
96 | ||
97 | /* supported controls */ | |
98 | /* Common to all boards */ | |
99 | static struct v4l2_queryctrl em28xx_qctrl[] = { | |
100 | { | |
101 | .id = V4L2_CID_AUDIO_VOLUME, | |
102 | .type = V4L2_CTRL_TYPE_INTEGER, | |
103 | .name = "Volume", | |
104 | .minimum = 0x0, | |
105 | .maximum = 0x1f, | |
106 | .step = 0x1, | |
107 | .default_value = 0x1f, | |
108 | .flags = 0, | |
109 | }, { | |
110 | .id = V4L2_CID_AUDIO_MUTE, | |
111 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
112 | .name = "Mute", | |
113 | .minimum = 0, | |
114 | .maximum = 1, | |
115 | .step = 1, | |
116 | .default_value = 1, | |
117 | .flags = 0, | |
118 | } | |
119 | }; | |
120 | ||
121 | static struct usb_driver em28xx_usb_driver; | |
122 | ||
123 | /* ------------------------------------------------------------------ | |
124 | DMA and thread functions | |
125 | ------------------------------------------------------------------*/ | |
126 | ||
127 | /* | |
128 | * Announces that a buffer were filled and request the next | |
129 | */ | |
130 | static inline void buffer_filled(struct em28xx *dev, | |
131 | struct em28xx_dmaqueue *dma_q, | |
132 | struct em28xx_buffer *buf) | |
133 | { | |
134 | /* Advice that buffer was filled */ | |
135 | em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); | |
136 | buf->vb.state = VIDEOBUF_DONE; | |
137 | buf->vb.field_count++; | |
138 | do_gettimeofday(&buf->vb.ts); | |
139 | ||
140 | dev->isoc_ctl.buf = NULL; | |
141 | ||
142 | list_del(&buf->vb.queue); | |
143 | wake_up(&buf->vb.done); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Identify the buffer header type and properly handles | |
148 | */ | |
149 | static void em28xx_copy_video(struct em28xx *dev, | |
150 | struct em28xx_dmaqueue *dma_q, | |
151 | struct em28xx_buffer *buf, | |
152 | unsigned char *p, | |
153 | unsigned char *outp, unsigned long len) | |
154 | { | |
155 | void *fieldstart, *startwrite, *startread; | |
156 | int linesdone, currlinedone, offset, lencopy, remain; | |
157 | int bytesperline = dev->width << 1; | |
158 | ||
159 | if (dma_q->pos + len > buf->vb.size) | |
160 | len = buf->vb.size - dma_q->pos; | |
161 | ||
162 | if (p[0] != 0x88 && p[0] != 0x22) { | |
163 | em28xx_isocdbg("frame is not complete\n"); | |
164 | len += 4; | |
165 | } else | |
166 | p += 4; | |
167 | ||
168 | startread = p; | |
169 | remain = len; | |
170 | ||
171 | /* Interlaces frame */ | |
172 | if (buf->top_field) | |
173 | fieldstart = outp; | |
174 | else | |
175 | fieldstart = outp + bytesperline; | |
176 | ||
177 | linesdone = dma_q->pos / bytesperline; | |
178 | currlinedone = dma_q->pos % bytesperline; | |
179 | offset = linesdone * bytesperline * 2 + currlinedone; | |
180 | startwrite = fieldstart + offset; | |
181 | lencopy = bytesperline - currlinedone; | |
182 | lencopy = lencopy > remain ? remain : lencopy; | |
183 | ||
184 | if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { | |
185 | em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", | |
186 | ((char *)startwrite + lencopy) - | |
187 | ((char *)outp + buf->vb.size)); | |
188 | lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite; | |
189 | } | |
190 | if (lencopy <= 0) | |
191 | return; | |
192 | memcpy(startwrite, startread, lencopy); | |
193 | ||
194 | remain -= lencopy; | |
195 | ||
196 | while (remain > 0) { | |
197 | startwrite += lencopy + bytesperline; | |
198 | startread += lencopy; | |
199 | if (bytesperline > remain) | |
200 | lencopy = remain; | |
201 | else | |
202 | lencopy = bytesperline; | |
203 | ||
204 | if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { | |
205 | em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n", | |
206 | ((char *)startwrite + lencopy) - | |
207 | ((char *)outp + buf->vb.size)); | |
208 | lencopy = remain = (char *)outp + buf->vb.size - | |
209 | (char *)startwrite; | |
210 | } | |
211 | if (lencopy <= 0) | |
212 | break; | |
213 | ||
214 | memcpy(startwrite, startread, lencopy); | |
215 | ||
216 | remain -= lencopy; | |
217 | } | |
218 | ||
219 | dma_q->pos += len; | |
220 | } | |
221 | ||
222 | static inline void print_err_status(struct em28xx *dev, | |
223 | int packet, int status) | |
224 | { | |
225 | char *errmsg = "Unknown"; | |
226 | ||
227 | switch (status) { | |
228 | case -ENOENT: | |
229 | errmsg = "unlinked synchronuously"; | |
230 | break; | |
231 | case -ECONNRESET: | |
232 | errmsg = "unlinked asynchronuously"; | |
233 | break; | |
234 | case -ENOSR: | |
235 | errmsg = "Buffer error (overrun)"; | |
236 | break; | |
237 | case -EPIPE: | |
238 | errmsg = "Stalled (device not responding)"; | |
239 | break; | |
240 | case -EOVERFLOW: | |
241 | errmsg = "Babble (bad cable?)"; | |
242 | break; | |
243 | case -EPROTO: | |
244 | errmsg = "Bit-stuff error (bad cable?)"; | |
245 | break; | |
246 | case -EILSEQ: | |
247 | errmsg = "CRC/Timeout (could be anything)"; | |
248 | break; | |
249 | case -ETIME: | |
250 | errmsg = "Device does not respond"; | |
251 | break; | |
252 | } | |
253 | if (packet < 0) { | |
254 | em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); | |
255 | } else { | |
256 | em28xx_isocdbg("URB packet %d, status %d [%s].\n", | |
257 | packet, status, errmsg); | |
258 | } | |
259 | } | |
260 | ||
261 | /* | |
262 | * video-buf generic routine to get the next available buffer | |
263 | */ | |
264 | static inline void get_next_buf(struct em28xx_dmaqueue *dma_q, | |
265 | struct em28xx_buffer **buf) | |
266 | { | |
267 | struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); | |
268 | char *outp; | |
269 | ||
270 | if (list_empty(&dma_q->active)) { | |
271 | em28xx_isocdbg("No active queue to serve\n"); | |
272 | dev->isoc_ctl.buf = NULL; | |
273 | *buf = NULL; | |
274 | return; | |
275 | } | |
276 | ||
277 | /* Get the next buffer */ | |
278 | *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); | |
279 | ||
280 | /* Cleans up buffer - Usefull for testing for frame/URB loss */ | |
281 | outp = videobuf_to_vmalloc(&(*buf)->vb); | |
282 | memset(outp, 0, (*buf)->vb.size); | |
283 | ||
284 | dev->isoc_ctl.buf = *buf; | |
285 | ||
286 | return; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Controls the isoc copy of each urb packet | |
291 | */ | |
292 | static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb) | |
293 | { | |
294 | struct em28xx_buffer *buf; | |
295 | struct em28xx_dmaqueue *dma_q = urb->context; | |
296 | unsigned char *outp = NULL; | |
297 | int i, len = 0, rc = 1; | |
298 | unsigned char *p; | |
299 | ||
300 | if (!dev) | |
301 | return 0; | |
302 | ||
303 | if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) | |
304 | return 0; | |
305 | ||
306 | if (urb->status < 0) { | |
307 | print_err_status(dev, -1, urb->status); | |
308 | if (urb->status == -ENOENT) | |
309 | return 0; | |
310 | } | |
311 | ||
312 | buf = dev->isoc_ctl.buf; | |
313 | if (buf != NULL) | |
314 | outp = videobuf_to_vmalloc(&buf->vb); | |
315 | ||
316 | for (i = 0; i < urb->number_of_packets; i++) { | |
317 | int status = urb->iso_frame_desc[i].status; | |
318 | ||
319 | if (status < 0) { | |
320 | print_err_status(dev, i, status); | |
321 | if (urb->iso_frame_desc[i].status != -EPROTO) | |
322 | continue; | |
323 | } | |
324 | ||
325 | len = urb->iso_frame_desc[i].actual_length - 4; | |
326 | ||
327 | if (urb->iso_frame_desc[i].actual_length <= 0) { | |
328 | /* em28xx_isocdbg("packet %d is empty",i); - spammy */ | |
329 | continue; | |
330 | } | |
331 | if (urb->iso_frame_desc[i].actual_length > | |
332 | dev->max_pkt_size) { | |
333 | em28xx_isocdbg("packet bigger than packet size"); | |
334 | continue; | |
335 | } | |
336 | ||
337 | p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
338 | ||
339 | /* FIXME: incomplete buffer checks where removed to make | |
340 | logic simpler. Impacts of those changes should be evaluated | |
341 | */ | |
342 | if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { | |
343 | em28xx_isocdbg("VBI HEADER!!!\n"); | |
344 | /* FIXME: Should add vbi copy */ | |
345 | continue; | |
346 | } | |
347 | if (p[0] == 0x22 && p[1] == 0x5a) { | |
348 | em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], | |
349 | len, (p[2] & 1)? "odd" : "even"); | |
350 | ||
351 | if (!(p[2] & 1)) { | |
352 | if (buf != NULL) | |
353 | buffer_filled(dev, dma_q, buf); | |
354 | get_next_buf(dma_q, &buf); | |
355 | if (buf == NULL) | |
356 | outp = NULL; | |
357 | else | |
358 | outp = videobuf_to_vmalloc(&buf->vb); | |
359 | } | |
360 | ||
361 | if (buf != NULL) { | |
362 | if (p[2] & 1) | |
363 | buf->top_field = 0; | |
364 | else | |
365 | buf->top_field = 1; | |
366 | } | |
367 | ||
368 | dma_q->pos = 0; | |
369 | } | |
370 | if (buf != NULL) | |
371 | em28xx_copy_video(dev, dma_q, buf, p, outp, len); | |
372 | } | |
373 | return rc; | |
374 | } | |
375 | ||
376 | /* ------------------------------------------------------------------ | |
377 | Videobuf operations | |
378 | ------------------------------------------------------------------*/ | |
379 | ||
380 | static int | |
381 | buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) | |
382 | { | |
383 | struct em28xx_fh *fh = vq->priv_data; | |
384 | struct em28xx *dev = fh->dev; | |
385 | struct v4l2_frequency f; | |
386 | ||
387 | *size = 16 * fh->dev->width * fh->dev->height >> 3; | |
388 | if (0 == *count) | |
389 | *count = EM28XX_DEF_BUF; | |
390 | ||
391 | if (*count < EM28XX_MIN_BUF) | |
392 | *count = EM28XX_MIN_BUF; | |
393 | ||
394 | /* Ask tuner to go to analog mode */ | |
395 | memset(&f, 0, sizeof(f)); | |
396 | f.frequency = dev->ctl_freq; | |
397 | ||
398 | em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | /* This is called *without* dev->slock held; please keep it that way */ | |
404 | static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) | |
405 | { | |
406 | struct em28xx_fh *fh = vq->priv_data; | |
407 | struct em28xx *dev = fh->dev; | |
408 | unsigned long flags = 0; | |
409 | if (in_interrupt()) | |
410 | BUG(); | |
411 | ||
412 | /* We used to wait for the buffer to finish here, but this didn't work | |
413 | because, as we were keeping the state as VIDEOBUF_QUEUED, | |
414 | videobuf_queue_cancel marked it as finished for us. | |
415 | (Also, it could wedge forever if the hardware was misconfigured.) | |
416 | ||
417 | This should be safe; by the time we get here, the buffer isn't | |
418 | queued anymore. If we ever start marking the buffers as | |
419 | VIDEOBUF_ACTIVE, it won't be, though. | |
420 | */ | |
421 | spin_lock_irqsave(&dev->slock, flags); | |
422 | if (dev->isoc_ctl.buf == buf) | |
423 | dev->isoc_ctl.buf = NULL; | |
424 | spin_unlock_irqrestore(&dev->slock, flags); | |
425 | ||
426 | videobuf_vmalloc_free(&buf->vb); | |
427 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
428 | } | |
429 | ||
430 | static int | |
431 | buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
432 | enum v4l2_field field) | |
433 | { | |
434 | struct em28xx_fh *fh = vq->priv_data; | |
435 | struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); | |
436 | struct em28xx *dev = fh->dev; | |
437 | int rc = 0, urb_init = 0; | |
438 | ||
439 | /* FIXME: It assumes depth = 16 */ | |
440 | /* The only currently supported format is 16 bits/pixel */ | |
441 | buf->vb.size = 16 * dev->width * dev->height >> 3; | |
442 | ||
443 | if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) | |
444 | return -EINVAL; | |
445 | ||
446 | buf->vb.width = dev->width; | |
447 | buf->vb.height = dev->height; | |
448 | buf->vb.field = field; | |
449 | ||
450 | if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { | |
451 | rc = videobuf_iolock(vq, &buf->vb, NULL); | |
452 | if (rc < 0) | |
453 | goto fail; | |
454 | } | |
455 | ||
456 | if (!dev->isoc_ctl.num_bufs) | |
457 | urb_init = 1; | |
458 | ||
459 | if (urb_init) { | |
460 | rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS, | |
461 | EM28XX_NUM_BUFS, dev->max_pkt_size, | |
462 | em28xx_isoc_copy); | |
463 | if (rc < 0) | |
464 | goto fail; | |
465 | } | |
466 | ||
467 | buf->vb.state = VIDEOBUF_PREPARED; | |
468 | return 0; | |
469 | ||
470 | fail: | |
471 | free_buffer(vq, buf); | |
472 | return rc; | |
473 | } | |
474 | ||
475 | static void | |
476 | buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
477 | { | |
478 | struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); | |
479 | struct em28xx_fh *fh = vq->priv_data; | |
480 | struct em28xx *dev = fh->dev; | |
481 | struct em28xx_dmaqueue *vidq = &dev->vidq; | |
482 | ||
483 | buf->vb.state = VIDEOBUF_QUEUED; | |
484 | list_add_tail(&buf->vb.queue, &vidq->active); | |
485 | ||
486 | } | |
487 | ||
488 | static void buffer_release(struct videobuf_queue *vq, | |
489 | struct videobuf_buffer *vb) | |
490 | { | |
491 | struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); | |
492 | struct em28xx_fh *fh = vq->priv_data; | |
493 | struct em28xx *dev = (struct em28xx *)fh->dev; | |
494 | ||
495 | em28xx_isocdbg("em28xx: called buffer_release\n"); | |
496 | ||
497 | free_buffer(vq, buf); | |
498 | } | |
499 | ||
500 | static struct videobuf_queue_ops em28xx_video_qops = { | |
501 | .buf_setup = buffer_setup, | |
502 | .buf_prepare = buffer_prepare, | |
503 | .buf_queue = buffer_queue, | |
504 | .buf_release = buffer_release, | |
505 | }; | |
506 | ||
507 | /********************* v4l2 interface **************************************/ | |
508 | ||
509 | /* | |
510 | * em28xx_config() | |
511 | * inits registers with sane defaults | |
512 | */ | |
513 | static int em28xx_config(struct em28xx *dev) | |
514 | { | |
515 | ||
516 | /* Sets I2C speed to 100 KHz */ | |
517 | if (!dev->is_em2800) | |
518 | em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1); | |
519 | ||
520 | /* enable vbi capturing */ | |
521 | ||
522 | /* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */ | |
523 | /* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */ | |
524 | em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1); | |
525 | ||
526 | dev->mute = 1; /* maybe not the right place... */ | |
527 | dev->volume = 0x1f; | |
528 | ||
529 | em28xx_outfmt_set_yuv422(dev); | |
530 | em28xx_colorlevels_set_default(dev); | |
531 | em28xx_compression_disable(dev); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | /* | |
537 | * em28xx_config_i2c() | |
538 | * configure i2c attached devices | |
539 | */ | |
540 | static void em28xx_config_i2c(struct em28xx *dev) | |
541 | { | |
542 | struct v4l2_routing route; | |
543 | ||
544 | route.input = INPUT(dev->ctl_input)->vmux; | |
545 | route.output = 0; | |
546 | em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL); | |
547 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); | |
548 | em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); | |
549 | } | |
550 | ||
551 | static void video_mux(struct em28xx *dev, int index) | |
552 | { | |
553 | struct v4l2_routing route; | |
554 | ||
555 | route.input = INPUT(index)->vmux; | |
556 | route.output = 0; | |
557 | dev->ctl_input = index; | |
558 | dev->ctl_ainput = INPUT(index)->amux; | |
559 | ||
560 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); | |
561 | ||
562 | if (dev->has_msp34xx) { | |
563 | if (dev->i2s_speed) { | |
564 | em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, | |
565 | &dev->i2s_speed); | |
566 | } | |
567 | route.input = dev->ctl_ainput; | |
568 | route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); | |
569 | /* Note: this is msp3400 specific */ | |
570 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, | |
571 | &route); | |
572 | } | |
573 | ||
574 | em28xx_audio_analog_set(dev); | |
575 | } | |
576 | ||
577 | /* Usage lock check functions */ | |
578 | static int res_get(struct em28xx_fh *fh) | |
579 | { | |
580 | struct em28xx *dev = fh->dev; | |
581 | int rc = 0; | |
582 | ||
583 | /* This instance already has stream_on */ | |
584 | if (fh->stream_on) | |
585 | return rc; | |
586 | ||
587 | if (dev->stream_on) | |
588 | return -EINVAL; | |
589 | ||
590 | mutex_lock(&dev->lock); | |
591 | dev->stream_on = 1; | |
592 | fh->stream_on = 1; | |
593 | mutex_unlock(&dev->lock); | |
594 | return rc; | |
595 | } | |
596 | ||
597 | static int res_check(struct em28xx_fh *fh) | |
598 | { | |
599 | return (fh->stream_on); | |
600 | } | |
601 | ||
602 | static void res_free(struct em28xx_fh *fh) | |
603 | { | |
604 | struct em28xx *dev = fh->dev; | |
605 | ||
606 | mutex_lock(&dev->lock); | |
607 | fh->stream_on = 0; | |
608 | dev->stream_on = 0; | |
609 | mutex_unlock(&dev->lock); | |
610 | } | |
611 | ||
612 | /* | |
613 | * em28xx_get_ctrl() | |
614 | * return the current saturation, brightness or contrast, mute state | |
615 | */ | |
616 | static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) | |
617 | { | |
618 | switch (ctrl->id) { | |
619 | case V4L2_CID_AUDIO_MUTE: | |
620 | ctrl->value = dev->mute; | |
621 | return 0; | |
622 | case V4L2_CID_AUDIO_VOLUME: | |
623 | ctrl->value = dev->volume; | |
624 | return 0; | |
625 | default: | |
626 | return -EINVAL; | |
627 | } | |
628 | } | |
629 | ||
630 | /* | |
631 | * em28xx_set_ctrl() | |
632 | * mute or set new saturation, brightness or contrast | |
633 | */ | |
634 | static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) | |
635 | { | |
636 | switch (ctrl->id) { | |
637 | case V4L2_CID_AUDIO_MUTE: | |
638 | if (ctrl->value != dev->mute) { | |
639 | dev->mute = ctrl->value; | |
640 | return em28xx_audio_analog_set(dev); | |
641 | } | |
642 | return 0; | |
643 | case V4L2_CID_AUDIO_VOLUME: | |
644 | dev->volume = ctrl->value; | |
645 | return em28xx_audio_analog_set(dev); | |
646 | default: | |
647 | return -EINVAL; | |
648 | } | |
649 | } | |
650 | ||
651 | static int check_dev(struct em28xx *dev) | |
652 | { | |
653 | if (dev->state & DEV_DISCONNECTED) { | |
654 | em28xx_errdev("v4l2 ioctl: device not present\n"); | |
655 | return -ENODEV; | |
656 | } | |
657 | ||
658 | if (dev->state & DEV_MISCONFIGURED) { | |
659 | em28xx_errdev("v4l2 ioctl: device is misconfigured; " | |
660 | "close and open it again\n"); | |
661 | return -EIO; | |
662 | } | |
663 | return 0; | |
664 | } | |
665 | ||
666 | static void get_scale(struct em28xx *dev, | |
667 | unsigned int width, unsigned int height, | |
668 | unsigned int *hscale, unsigned int *vscale) | |
669 | { | |
670 | unsigned int maxw = norm_maxw(dev); | |
671 | unsigned int maxh = norm_maxh(dev); | |
672 | ||
673 | *hscale = (((unsigned long)maxw) << 12) / width - 4096L; | |
674 | if (*hscale >= 0x4000) | |
675 | *hscale = 0x3fff; | |
676 | ||
677 | *vscale = (((unsigned long)maxh) << 12) / height - 4096L; | |
678 | if (*vscale >= 0x4000) | |
679 | *vscale = 0x3fff; | |
680 | } | |
681 | ||
682 | /* ------------------------------------------------------------------ | |
683 | IOCTL vidioc handling | |
684 | ------------------------------------------------------------------*/ | |
685 | ||
686 | static int vidioc_g_fmt_cap(struct file *file, void *priv, | |
687 | struct v4l2_format *f) | |
688 | { | |
689 | struct em28xx_fh *fh = priv; | |
690 | struct em28xx *dev = fh->dev; | |
691 | ||
692 | mutex_lock(&dev->lock); | |
693 | ||
694 | f->fmt.pix.width = dev->width; | |
695 | f->fmt.pix.height = dev->height; | |
696 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | |
697 | f->fmt.pix.bytesperline = dev->width * 2; | |
698 | f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; | |
699 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; | |
700 | ||
701 | /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ | |
702 | f->fmt.pix.field = dev->interlaced ? | |
703 | V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; | |
704 | ||
705 | mutex_unlock(&dev->lock); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | static int vidioc_try_fmt_cap(struct file *file, void *priv, | |
710 | struct v4l2_format *f) | |
711 | { | |
712 | struct em28xx_fh *fh = priv; | |
713 | struct em28xx *dev = fh->dev; | |
714 | int width = f->fmt.pix.width; | |
715 | int height = f->fmt.pix.height; | |
716 | unsigned int maxw = norm_maxw(dev); | |
717 | unsigned int maxh = norm_maxh(dev); | |
718 | unsigned int hscale, vscale; | |
719 | ||
720 | /* width must even because of the YUYV format | |
721 | height must be even because of interlacing */ | |
722 | height &= 0xfffe; | |
723 | width &= 0xfffe; | |
724 | ||
725 | if (height < 32) | |
726 | height = 32; | |
727 | if (height > maxh) | |
728 | height = maxh; | |
729 | if (width < 48) | |
730 | width = 48; | |
731 | if (width > maxw) | |
732 | width = maxw; | |
733 | ||
734 | mutex_lock(&dev->lock); | |
735 | ||
736 | if (dev->is_em2800) { | |
737 | /* the em2800 can only scale down to 50% */ | |
738 | if (height % (maxh / 2)) | |
739 | height = maxh; | |
740 | if (width % (maxw / 2)) | |
741 | width = maxw; | |
742 | /* according to empiatech support */ | |
743 | /* the MaxPacketSize is to small to support */ | |
744 | /* framesizes larger than 640x480 @ 30 fps */ | |
745 | /* or 640x576 @ 25 fps. As this would cut */ | |
746 | /* of a part of the image we prefer */ | |
747 | /* 360x576 or 360x480 for now */ | |
748 | if (width == maxw && height == maxh) | |
749 | width /= 2; | |
750 | } | |
751 | ||
752 | get_scale(dev, width, height, &hscale, &vscale); | |
753 | ||
754 | width = (((unsigned long)maxw) << 12) / (hscale + 4096L); | |
755 | height = (((unsigned long)maxh) << 12) / (vscale + 4096L); | |
756 | ||
757 | f->fmt.pix.width = width; | |
758 | f->fmt.pix.height = height; | |
759 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | |
760 | f->fmt.pix.bytesperline = width * 2; | |
761 | f->fmt.pix.sizeimage = width * 2 * height; | |
762 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; | |
763 | f->fmt.pix.field = V4L2_FIELD_INTERLACED; | |
764 | ||
765 | mutex_unlock(&dev->lock); | |
766 | return 0; | |
767 | } | |
768 | ||
769 | static int vidioc_s_fmt_cap(struct file *file, void *priv, | |
770 | struct v4l2_format *f) | |
771 | { | |
772 | struct em28xx_fh *fh = priv; | |
773 | struct em28xx *dev = fh->dev; | |
774 | int rc; | |
775 | ||
776 | rc = check_dev(dev); | |
777 | if (rc < 0) | |
778 | return rc; | |
779 | ||
780 | vidioc_try_fmt_cap(file, priv, f); | |
781 | ||
782 | mutex_lock(&dev->lock); | |
783 | ||
784 | if (videobuf_queue_is_busy(&fh->vb_vidq)) { | |
785 | em28xx_errdev("%s queue busy\n", __func__); | |
786 | rc = -EBUSY; | |
787 | goto out; | |
788 | } | |
789 | ||
790 | if (dev->stream_on && !fh->stream_on) { | |
791 | em28xx_errdev("%s device in use by another fh\n", __func__); | |
792 | rc = -EBUSY; | |
793 | goto out; | |
794 | } | |
795 | ||
796 | /* set new image size */ | |
797 | dev->width = f->fmt.pix.width; | |
798 | dev->height = f->fmt.pix.height; | |
799 | get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); | |
800 | ||
801 | em28xx_set_alternate(dev); | |
802 | em28xx_resolution_set(dev); | |
803 | ||
804 | rc = 0; | |
805 | ||
806 | out: | |
807 | mutex_unlock(&dev->lock); | |
808 | return rc; | |
809 | } | |
810 | ||
811 | static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm) | |
812 | { | |
813 | struct em28xx_fh *fh = priv; | |
814 | struct em28xx *dev = fh->dev; | |
815 | struct v4l2_format f; | |
816 | int rc; | |
817 | ||
818 | rc = check_dev(dev); | |
819 | if (rc < 0) | |
820 | return rc; | |
821 | ||
822 | mutex_lock(&dev->lock); | |
823 | dev->norm = *norm; | |
824 | mutex_unlock(&dev->lock); | |
825 | ||
826 | /* Adjusts width/height, if needed */ | |
827 | f.fmt.pix.width = dev->width; | |
828 | f.fmt.pix.height = dev->height; | |
829 | vidioc_try_fmt_cap(file, priv, &f); | |
830 | ||
831 | mutex_lock(&dev->lock); | |
832 | ||
833 | /* set new image size */ | |
834 | dev->width = f.fmt.pix.width; | |
835 | dev->height = f.fmt.pix.height; | |
836 | get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); | |
837 | ||
838 | em28xx_resolution_set(dev); | |
839 | em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm); | |
840 | ||
841 | mutex_unlock(&dev->lock); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | static const char *iname[] = { | |
846 | [EM28XX_VMUX_COMPOSITE1] = "Composite1", | |
847 | [EM28XX_VMUX_COMPOSITE2] = "Composite2", | |
848 | [EM28XX_VMUX_COMPOSITE3] = "Composite3", | |
849 | [EM28XX_VMUX_COMPOSITE4] = "Composite4", | |
850 | [EM28XX_VMUX_SVIDEO] = "S-Video", | |
851 | [EM28XX_VMUX_TELEVISION] = "Television", | |
852 | [EM28XX_VMUX_CABLE] = "Cable TV", | |
853 | [EM28XX_VMUX_DVB] = "DVB", | |
854 | [EM28XX_VMUX_DEBUG] = "for debug only", | |
855 | }; | |
856 | ||
857 | static int vidioc_enum_input(struct file *file, void *priv, | |
858 | struct v4l2_input *i) | |
859 | { | |
860 | struct em28xx_fh *fh = priv; | |
861 | struct em28xx *dev = fh->dev; | |
862 | unsigned int n; | |
863 | ||
864 | n = i->index; | |
865 | if (n >= MAX_EM28XX_INPUT) | |
866 | return -EINVAL; | |
867 | if (0 == INPUT(n)->type) | |
868 | return -EINVAL; | |
869 | ||
870 | i->index = n; | |
871 | i->type = V4L2_INPUT_TYPE_CAMERA; | |
872 | ||
873 | strcpy(i->name, iname[INPUT(n)->type]); | |
874 | ||
875 | if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || | |
876 | (EM28XX_VMUX_CABLE == INPUT(n)->type)) | |
877 | i->type = V4L2_INPUT_TYPE_TUNER; | |
878 | ||
879 | i->std = dev->vdev->tvnorms; | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
885 | { | |
886 | struct em28xx_fh *fh = priv; | |
887 | struct em28xx *dev = fh->dev; | |
888 | ||
889 | *i = dev->ctl_input; | |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
894 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
895 | { | |
896 | struct em28xx_fh *fh = priv; | |
897 | struct em28xx *dev = fh->dev; | |
898 | int rc; | |
899 | ||
900 | rc = check_dev(dev); | |
901 | if (rc < 0) | |
902 | return rc; | |
903 | ||
904 | if (i >= MAX_EM28XX_INPUT) | |
905 | return -EINVAL; | |
906 | if (0 == INPUT(i)->type) | |
907 | return -EINVAL; | |
908 | ||
909 | mutex_lock(&dev->lock); | |
910 | ||
911 | video_mux(dev, i); | |
912 | ||
913 | mutex_unlock(&dev->lock); | |
914 | return 0; | |
915 | } | |
916 | ||
917 | static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) | |
918 | { | |
919 | struct em28xx_fh *fh = priv; | |
920 | struct em28xx *dev = fh->dev; | |
921 | unsigned int index = a->index; | |
922 | ||
923 | if (a->index > 1) | |
924 | return -EINVAL; | |
925 | ||
926 | index = dev->ctl_ainput; | |
927 | ||
928 | if (index == 0) | |
929 | strcpy(a->name, "Television"); | |
930 | else | |
931 | strcpy(a->name, "Line In"); | |
932 | ||
933 | a->capability = V4L2_AUDCAP_STEREO; | |
934 | a->index = index; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) | |
940 | { | |
941 | struct em28xx_fh *fh = priv; | |
942 | struct em28xx *dev = fh->dev; | |
943 | ||
944 | if (a->index != dev->ctl_ainput) | |
945 | return -EINVAL; | |
946 | ||
947 | return 0; | |
948 | } | |
949 | ||
950 | static int vidioc_queryctrl(struct file *file, void *priv, | |
951 | struct v4l2_queryctrl *qc) | |
952 | { | |
953 | struct em28xx_fh *fh = priv; | |
954 | struct em28xx *dev = fh->dev; | |
955 | int id = qc->id; | |
956 | int i; | |
957 | int rc; | |
958 | ||
959 | rc = check_dev(dev); | |
960 | if (rc < 0) | |
961 | return rc; | |
962 | ||
963 | memset(qc, 0, sizeof(*qc)); | |
964 | ||
965 | qc->id = id; | |
966 | ||
967 | if (!dev->has_msp34xx) { | |
968 | for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { | |
969 | if (qc->id && qc->id == em28xx_qctrl[i].id) { | |
970 | memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); | |
971 | return 0; | |
972 | } | |
973 | } | |
974 | } | |
975 | mutex_lock(&dev->lock); | |
976 | em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc); | |
977 | mutex_unlock(&dev->lock); | |
978 | ||
979 | if (qc->type) | |
980 | return 0; | |
981 | else | |
982 | return -EINVAL; | |
983 | } | |
984 | ||
985 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
986 | struct v4l2_control *ctrl) | |
987 | { | |
988 | struct em28xx_fh *fh = priv; | |
989 | struct em28xx *dev = fh->dev; | |
990 | int rc; | |
991 | ||
992 | rc = check_dev(dev); | |
993 | if (rc < 0) | |
994 | return rc; | |
995 | mutex_lock(&dev->lock); | |
996 | ||
997 | if (!dev->has_msp34xx) | |
998 | rc = em28xx_get_ctrl(dev, ctrl); | |
999 | else | |
1000 | rc = -EINVAL; | |
1001 | ||
1002 | if (rc == -EINVAL) { | |
1003 | em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl); | |
1004 | rc = 0; | |
1005 | } | |
1006 | ||
1007 | mutex_unlock(&dev->lock); | |
1008 | return rc; | |
1009 | } | |
1010 | ||
1011 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1012 | struct v4l2_control *ctrl) | |
1013 | { | |
1014 | struct em28xx_fh *fh = priv; | |
1015 | struct em28xx *dev = fh->dev; | |
1016 | u8 i; | |
1017 | int rc; | |
1018 | ||
1019 | rc = check_dev(dev); | |
1020 | if (rc < 0) | |
1021 | return rc; | |
1022 | ||
1023 | mutex_lock(&dev->lock); | |
1024 | ||
1025 | if (dev->has_msp34xx) | |
1026 | em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); | |
1027 | else { | |
1028 | rc = 1; | |
1029 | for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { | |
1030 | if (ctrl->id == em28xx_qctrl[i].id) { | |
1031 | if (ctrl->value < em28xx_qctrl[i].minimum || | |
1032 | ctrl->value > em28xx_qctrl[i].maximum) { | |
1033 | rc = -ERANGE; | |
1034 | break; | |
1035 | } | |
1036 | ||
1037 | rc = em28xx_set_ctrl(dev, ctrl); | |
1038 | break; | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | /* Control not found - try to send it to the attached devices */ | |
1044 | if (rc == 1) { | |
1045 | em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl); | |
1046 | rc = 0; | |
1047 | } | |
1048 | ||
1049 | mutex_unlock(&dev->lock); | |
1050 | return rc; | |
1051 | } | |
1052 | ||
1053 | static int vidioc_g_tuner(struct file *file, void *priv, | |
1054 | struct v4l2_tuner *t) | |
1055 | { | |
1056 | struct em28xx_fh *fh = priv; | |
1057 | struct em28xx *dev = fh->dev; | |
1058 | int rc; | |
1059 | ||
1060 | rc = check_dev(dev); | |
1061 | if (rc < 0) | |
1062 | return rc; | |
1063 | ||
1064 | if (0 != t->index) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | strcpy(t->name, "Tuner"); | |
1068 | ||
1069 | mutex_lock(&dev->lock); | |
1070 | ||
1071 | em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); | |
1072 | ||
1073 | mutex_unlock(&dev->lock); | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | static int vidioc_s_tuner(struct file *file, void *priv, | |
1078 | struct v4l2_tuner *t) | |
1079 | { | |
1080 | struct em28xx_fh *fh = priv; | |
1081 | struct em28xx *dev = fh->dev; | |
1082 | int rc; | |
1083 | ||
1084 | rc = check_dev(dev); | |
1085 | if (rc < 0) | |
1086 | return rc; | |
1087 | ||
1088 | if (0 != t->index) | |
1089 | return -EINVAL; | |
1090 | ||
1091 | mutex_lock(&dev->lock); | |
1092 | ||
1093 | em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); | |
1094 | ||
1095 | mutex_unlock(&dev->lock); | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int vidioc_g_frequency(struct file *file, void *priv, | |
1100 | struct v4l2_frequency *f) | |
1101 | { | |
1102 | struct em28xx_fh *fh = priv; | |
1103 | struct em28xx *dev = fh->dev; | |
1104 | ||
1105 | f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; | |
1106 | f->frequency = dev->ctl_freq; | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | static int vidioc_s_frequency(struct file *file, void *priv, | |
1112 | struct v4l2_frequency *f) | |
1113 | { | |
1114 | struct em28xx_fh *fh = priv; | |
1115 | struct em28xx *dev = fh->dev; | |
1116 | int rc; | |
1117 | ||
1118 | rc = check_dev(dev); | |
1119 | if (rc < 0) | |
1120 | return rc; | |
1121 | ||
1122 | if (0 != f->tuner) | |
1123 | return -EINVAL; | |
1124 | ||
1125 | if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV)) | |
1126 | return -EINVAL; | |
1127 | if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO)) | |
1128 | return -EINVAL; | |
1129 | ||
1130 | mutex_lock(&dev->lock); | |
1131 | ||
1132 | dev->ctl_freq = f->frequency; | |
1133 | em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); | |
1134 | ||
1135 | mutex_unlock(&dev->lock); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1140 | static int em28xx_reg_len(int reg) | |
1141 | { | |
1142 | switch (reg) { | |
1143 | case EM28XX_R40_AC97LSB: | |
1144 | case EM28XX_R30_HSCALELOW: | |
1145 | case EM28XX_R32_VSCALELOW: | |
1146 | return 2; | |
1147 | default: | |
1148 | return 1; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static int vidioc_g_register(struct file *file, void *priv, | |
1153 | struct v4l2_register *reg) | |
1154 | { | |
1155 | struct em28xx_fh *fh = priv; | |
1156 | struct em28xx *dev = fh->dev; | |
1157 | int ret; | |
1158 | ||
1159 | if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) | |
1160 | return -EINVAL; | |
1161 | ||
1162 | if (em28xx_reg_len(reg->reg) == 1) { | |
1163 | ret = em28xx_read_reg(dev, reg->reg); | |
1164 | if (ret < 0) | |
1165 | return ret; | |
1166 | ||
1167 | reg->val = ret; | |
1168 | } else { | |
1169 | __le64 val = 0; | |
1170 | ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, | |
1171 | reg->reg, (char *)&val, 2); | |
1172 | if (ret < 0) | |
1173 | return ret; | |
1174 | ||
1175 | reg->val = le64_to_cpu(val); | |
1176 | } | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static int vidioc_s_register(struct file *file, void *priv, | |
1182 | struct v4l2_register *reg) | |
1183 | { | |
1184 | struct em28xx_fh *fh = priv; | |
1185 | struct em28xx *dev = fh->dev; | |
1186 | __le64 buf; | |
1187 | ||
1188 | buf = cpu_to_le64(reg->val); | |
1189 | ||
1190 | return em28xx_write_regs(dev, reg->reg, (char *)&buf, | |
1191 | em28xx_reg_len(reg->reg)); | |
1192 | } | |
1193 | #endif | |
1194 | ||
1195 | ||
1196 | static int vidioc_cropcap(struct file *file, void *priv, | |
1197 | struct v4l2_cropcap *cc) | |
1198 | { | |
1199 | struct em28xx_fh *fh = priv; | |
1200 | struct em28xx *dev = fh->dev; | |
1201 | ||
1202 | if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1203 | return -EINVAL; | |
1204 | ||
1205 | cc->bounds.left = 0; | |
1206 | cc->bounds.top = 0; | |
1207 | cc->bounds.width = dev->width; | |
1208 | cc->bounds.height = dev->height; | |
1209 | cc->defrect = cc->bounds; | |
1210 | cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ | |
1211 | cc->pixelaspect.denominator = 59; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static int vidioc_streamon(struct file *file, void *priv, | |
1217 | enum v4l2_buf_type type) | |
1218 | { | |
1219 | struct em28xx_fh *fh = priv; | |
1220 | struct em28xx *dev = fh->dev; | |
1221 | int rc; | |
1222 | ||
1223 | rc = check_dev(dev); | |
1224 | if (rc < 0) | |
1225 | return rc; | |
1226 | ||
1227 | ||
1228 | if (unlikely(res_get(fh) < 0)) | |
1229 | return -EBUSY; | |
1230 | ||
1231 | return (videobuf_streamon(&fh->vb_vidq)); | |
1232 | } | |
1233 | ||
1234 | static int vidioc_streamoff(struct file *file, void *priv, | |
1235 | enum v4l2_buf_type type) | |
1236 | { | |
1237 | struct em28xx_fh *fh = priv; | |
1238 | struct em28xx *dev = fh->dev; | |
1239 | int rc; | |
1240 | ||
1241 | rc = check_dev(dev); | |
1242 | if (rc < 0) | |
1243 | return rc; | |
1244 | ||
1245 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1246 | return -EINVAL; | |
1247 | if (type != fh->type) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | videobuf_streamoff(&fh->vb_vidq); | |
1251 | res_free(fh); | |
1252 | ||
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | static int vidioc_querycap(struct file *file, void *priv, | |
1257 | struct v4l2_capability *cap) | |
1258 | { | |
1259 | struct em28xx_fh *fh = priv; | |
1260 | struct em28xx *dev = fh->dev; | |
1261 | ||
1262 | strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); | |
1263 | strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); | |
1264 | strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); | |
1265 | ||
1266 | cap->version = EM28XX_VERSION_CODE; | |
1267 | ||
1268 | cap->capabilities = | |
1269 | V4L2_CAP_SLICED_VBI_CAPTURE | | |
1270 | V4L2_CAP_VIDEO_CAPTURE | | |
1271 | V4L2_CAP_AUDIO | | |
1272 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1273 | ||
1274 | if (dev->tuner_type != TUNER_ABSENT) | |
1275 | cap->capabilities |= V4L2_CAP_TUNER; | |
1276 | ||
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | static int vidioc_enum_fmt_cap(struct file *file, void *priv, | |
1281 | struct v4l2_fmtdesc *fmtd) | |
1282 | { | |
1283 | if (fmtd->index != 0) | |
1284 | return -EINVAL; | |
1285 | ||
1286 | fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1287 | strcpy(fmtd->description, "Packed YUY2"); | |
1288 | fmtd->pixelformat = V4L2_PIX_FMT_YUYV; | |
1289 | memset(fmtd->reserved, 0, sizeof(fmtd->reserved)); | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | /* Sliced VBI ioctls */ | |
1295 | static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv, | |
1296 | struct v4l2_format *f) | |
1297 | { | |
1298 | struct em28xx_fh *fh = priv; | |
1299 | struct em28xx *dev = fh->dev; | |
1300 | int rc; | |
1301 | ||
1302 | rc = check_dev(dev); | |
1303 | if (rc < 0) | |
1304 | return rc; | |
1305 | ||
1306 | mutex_lock(&dev->lock); | |
1307 | ||
1308 | f->fmt.sliced.service_set = 0; | |
1309 | ||
1310 | em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); | |
1311 | ||
1312 | if (f->fmt.sliced.service_set == 0) | |
1313 | rc = -EINVAL; | |
1314 | ||
1315 | mutex_unlock(&dev->lock); | |
1316 | return rc; | |
1317 | } | |
1318 | ||
1319 | static int vidioc_try_set_vbi_capture(struct file *file, void *priv, | |
1320 | struct v4l2_format *f) | |
1321 | { | |
1322 | struct em28xx_fh *fh = priv; | |
1323 | struct em28xx *dev = fh->dev; | |
1324 | int rc; | |
1325 | ||
1326 | rc = check_dev(dev); | |
1327 | if (rc < 0) | |
1328 | return rc; | |
1329 | ||
1330 | mutex_lock(&dev->lock); | |
1331 | em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f); | |
1332 | mutex_unlock(&dev->lock); | |
1333 | ||
1334 | if (f->fmt.sliced.service_set == 0) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | ||
1341 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1342 | struct v4l2_requestbuffers *rb) | |
1343 | { | |
1344 | struct em28xx_fh *fh = priv; | |
1345 | struct em28xx *dev = fh->dev; | |
1346 | int rc; | |
1347 | ||
1348 | rc = check_dev(dev); | |
1349 | if (rc < 0) | |
1350 | return rc; | |
1351 | ||
1352 | return (videobuf_reqbufs(&fh->vb_vidq, rb)); | |
1353 | } | |
1354 | ||
1355 | static int vidioc_querybuf(struct file *file, void *priv, | |
1356 | struct v4l2_buffer *b) | |
1357 | { | |
1358 | struct em28xx_fh *fh = priv; | |
1359 | struct em28xx *dev = fh->dev; | |
1360 | int rc; | |
1361 | ||
1362 | rc = check_dev(dev); | |
1363 | if (rc < 0) | |
1364 | return rc; | |
1365 | ||
1366 | return (videobuf_querybuf(&fh->vb_vidq, b)); | |
1367 | } | |
1368 | ||
1369 | static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) | |
1370 | { | |
1371 | struct em28xx_fh *fh = priv; | |
1372 | struct em28xx *dev = fh->dev; | |
1373 | int rc; | |
1374 | ||
1375 | rc = check_dev(dev); | |
1376 | if (rc < 0) | |
1377 | return rc; | |
1378 | ||
1379 | return (videobuf_qbuf(&fh->vb_vidq, b)); | |
1380 | } | |
1381 | ||
1382 | static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) | |
1383 | { | |
1384 | struct em28xx_fh *fh = priv; | |
1385 | struct em28xx *dev = fh->dev; | |
1386 | int rc; | |
1387 | ||
1388 | rc = check_dev(dev); | |
1389 | if (rc < 0) | |
1390 | return rc; | |
1391 | ||
1392 | return (videobuf_dqbuf(&fh->vb_vidq, b, | |
1393 | file->f_flags & O_NONBLOCK)); | |
1394 | } | |
1395 | ||
1396 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1397 | static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) | |
1398 | { | |
1399 | struct em28xx_fh *fh = priv; | |
1400 | ||
1401 | return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8); | |
1402 | } | |
1403 | #endif | |
1404 | ||
1405 | ||
1406 | /* ----------------------------------------------------------- */ | |
1407 | /* RADIO ESPECIFIC IOCTLS */ | |
1408 | /* ----------------------------------------------------------- */ | |
1409 | ||
1410 | static int radio_querycap(struct file *file, void *priv, | |
1411 | struct v4l2_capability *cap) | |
1412 | { | |
1413 | struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; | |
1414 | ||
1415 | strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); | |
1416 | strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); | |
1417 | strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); | |
1418 | ||
1419 | cap->version = EM28XX_VERSION_CODE; | |
1420 | cap->capabilities = V4L2_CAP_TUNER; | |
1421 | return 0; | |
1422 | } | |
1423 | ||
1424 | static int radio_g_tuner(struct file *file, void *priv, | |
1425 | struct v4l2_tuner *t) | |
1426 | { | |
1427 | struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; | |
1428 | ||
1429 | if (unlikely(t->index > 0)) | |
1430 | return -EINVAL; | |
1431 | ||
1432 | strcpy(t->name, "Radio"); | |
1433 | t->type = V4L2_TUNER_RADIO; | |
1434 | ||
1435 | em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | static int radio_enum_input(struct file *file, void *priv, | |
1440 | struct v4l2_input *i) | |
1441 | { | |
1442 | if (i->index != 0) | |
1443 | return -EINVAL; | |
1444 | strcpy(i->name, "Radio"); | |
1445 | i->type = V4L2_INPUT_TYPE_TUNER; | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a) | |
1451 | { | |
1452 | if (unlikely(a->index)) | |
1453 | return -EINVAL; | |
1454 | ||
1455 | strcpy(a->name, "Radio"); | |
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | static int radio_s_tuner(struct file *file, void *priv, | |
1460 | struct v4l2_tuner *t) | |
1461 | { | |
1462 | struct em28xx *dev = ((struct em28xx_fh *)priv)->dev; | |
1463 | ||
1464 | if (0 != t->index) | |
1465 | return -EINVAL; | |
1466 | ||
1467 | em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t); | |
1468 | ||
1469 | return 0; | |
1470 | } | |
1471 | ||
1472 | static int radio_s_audio(struct file *file, void *fh, | |
1473 | struct v4l2_audio *a) | |
1474 | { | |
1475 | return 0; | |
1476 | } | |
1477 | ||
1478 | static int radio_s_input(struct file *file, void *fh, unsigned int i) | |
1479 | { | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | static int radio_queryctrl(struct file *file, void *priv, | |
1484 | struct v4l2_queryctrl *qc) | |
1485 | { | |
1486 | int i; | |
1487 | ||
1488 | if (qc->id < V4L2_CID_BASE || | |
1489 | qc->id >= V4L2_CID_LASTP1) | |
1490 | return -EINVAL; | |
1491 | ||
1492 | for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { | |
1493 | if (qc->id && qc->id == em28xx_qctrl[i].id) { | |
1494 | memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); | |
1495 | return 0; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | return -EINVAL; | |
1500 | } | |
1501 | ||
1502 | /* | |
1503 | * em28xx_v4l2_open() | |
1504 | * inits the device and starts isoc transfer | |
1505 | */ | |
1506 | static int em28xx_v4l2_open(struct inode *inode, struct file *filp) | |
1507 | { | |
1508 | int minor = iminor(inode); | |
1509 | int errCode = 0, radio = 0; | |
1510 | struct em28xx *h, *dev = NULL; | |
1511 | struct em28xx_fh *fh; | |
1512 | enum v4l2_buf_type fh_type = 0; | |
1513 | ||
1514 | list_for_each_entry(h, &em28xx_devlist, devlist) { | |
1515 | if (h->vdev->minor == minor) { | |
1516 | dev = h; | |
1517 | fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1518 | } | |
1519 | if (h->vbi_dev->minor == minor) { | |
1520 | dev = h; | |
1521 | fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; | |
1522 | } | |
1523 | if (h->radio_dev && | |
1524 | h->radio_dev->minor == minor) { | |
1525 | radio = 1; | |
1526 | dev = h; | |
1527 | } | |
1528 | } | |
1529 | if (NULL == dev) | |
1530 | return -ENODEV; | |
1531 | ||
1532 | em28xx_videodbg("open minor=%d type=%s users=%d\n", | |
1533 | minor, v4l2_type_names[fh_type], dev->users); | |
1534 | ||
1535 | ||
1536 | fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); | |
1537 | if (!fh) { | |
1538 | em28xx_errdev("em28xx-video.c: Out of memory?!\n"); | |
1539 | return -ENOMEM; | |
1540 | } | |
1541 | mutex_lock(&dev->lock); | |
1542 | fh->dev = dev; | |
1543 | fh->radio = radio; | |
1544 | fh->type = fh_type; | |
1545 | filp->private_data = fh; | |
1546 | ||
1547 | if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { | |
1548 | dev->width = norm_maxw(dev); | |
1549 | dev->height = norm_maxh(dev); | |
1550 | dev->hscale = 0; | |
1551 | dev->vscale = 0; | |
1552 | ||
1553 | em28xx_set_mode(dev, EM28XX_ANALOG_MODE); | |
1554 | em28xx_set_alternate(dev); | |
1555 | em28xx_resolution_set(dev); | |
1556 | ||
1557 | /* Needed, since GPIO might have disabled power of | |
1558 | some i2c device | |
1559 | */ | |
1560 | em28xx_config_i2c(dev); | |
1561 | ||
1562 | } | |
1563 | if (fh->radio) { | |
1564 | em28xx_videodbg("video_open: setting radio device\n"); | |
1565 | em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL); | |
1566 | } | |
1567 | ||
1568 | dev->users++; | |
1569 | ||
1570 | videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, | |
1571 | NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED, | |
1572 | sizeof(struct em28xx_buffer), fh); | |
1573 | ||
1574 | mutex_unlock(&dev->lock); | |
1575 | ||
1576 | return errCode; | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | * em28xx_realease_resources() | |
1581 | * unregisters the v4l2,i2c and usb devices | |
1582 | * called when the device gets disconected or at module unload | |
1583 | */ | |
1584 | static void em28xx_release_resources(struct em28xx *dev) | |
1585 | { | |
1586 | ||
1587 | /*FIXME: I2C IR should be disconnected */ | |
1588 | ||
1589 | em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n", | |
1590 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, | |
1591 | dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); | |
1592 | list_del(&dev->devlist); | |
1593 | if (dev->radio_dev) { | |
1594 | if (-1 != dev->radio_dev->minor) | |
1595 | video_unregister_device(dev->radio_dev); | |
1596 | else | |
1597 | video_device_release(dev->radio_dev); | |
1598 | dev->radio_dev = NULL; | |
1599 | } | |
1600 | if (dev->vbi_dev) { | |
1601 | if (-1 != dev->vbi_dev->minor) | |
1602 | video_unregister_device(dev->vbi_dev); | |
1603 | else | |
1604 | video_device_release(dev->vbi_dev); | |
1605 | dev->vbi_dev = NULL; | |
1606 | } | |
1607 | if (dev->vdev) { | |
1608 | if (-1 != dev->vdev->minor) | |
1609 | video_unregister_device(dev->vdev); | |
1610 | else | |
1611 | video_device_release(dev->vdev); | |
1612 | dev->vdev = NULL; | |
1613 | } | |
1614 | em28xx_i2c_unregister(dev); | |
1615 | usb_put_dev(dev->udev); | |
1616 | ||
1617 | /* Mark device as unused */ | |
1618 | em28xx_devused &= ~(1<<dev->devno); | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * em28xx_v4l2_close() | |
1623 | * stops streaming and deallocates all resources allocated by the v4l2 | |
1624 | * calls and ioctls | |
1625 | */ | |
1626 | static int em28xx_v4l2_close(struct inode *inode, struct file *filp) | |
1627 | { | |
1628 | struct em28xx_fh *fh = filp->private_data; | |
1629 | struct em28xx *dev = fh->dev; | |
1630 | int errCode; | |
1631 | ||
1632 | em28xx_videodbg("users=%d\n", dev->users); | |
1633 | ||
1634 | ||
1635 | if (res_check(fh)) | |
1636 | res_free(fh); | |
1637 | ||
1638 | mutex_lock(&dev->lock); | |
1639 | ||
1640 | if (dev->users == 1) { | |
1641 | videobuf_stop(&fh->vb_vidq); | |
1642 | videobuf_mmap_free(&fh->vb_vidq); | |
1643 | ||
1644 | /* the device is already disconnect, | |
1645 | free the remaining resources */ | |
1646 | if (dev->state & DEV_DISCONNECTED) { | |
1647 | em28xx_release_resources(dev); | |
1648 | mutex_unlock(&dev->lock); | |
1649 | kfree(dev); | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | /* do this before setting alternate! */ | |
1654 | em28xx_uninit_isoc(dev); | |
1655 | em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED); | |
1656 | ||
1657 | /* set alternate 0 */ | |
1658 | dev->alt = 0; | |
1659 | em28xx_videodbg("setting alternate 0\n"); | |
1660 | errCode = usb_set_interface(dev->udev, 0, 0); | |
1661 | if (errCode < 0) { | |
1662 | em28xx_errdev("cannot change alternate number to " | |
1663 | "0 (error=%i)\n", errCode); | |
1664 | } | |
1665 | } | |
1666 | kfree(fh); | |
1667 | dev->users--; | |
1668 | wake_up_interruptible_nr(&dev->open, 1); | |
1669 | mutex_unlock(&dev->lock); | |
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * em28xx_v4l2_read() | |
1675 | * will allocate buffers when called for the first time | |
1676 | */ | |
1677 | static ssize_t | |
1678 | em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count, | |
1679 | loff_t *pos) | |
1680 | { | |
1681 | struct em28xx_fh *fh = filp->private_data; | |
1682 | struct em28xx *dev = fh->dev; | |
1683 | int rc; | |
1684 | ||
1685 | rc = check_dev(dev); | |
1686 | if (rc < 0) | |
1687 | return rc; | |
1688 | ||
1689 | /* FIXME: read() is not prepared to allow changing the video | |
1690 | resolution while streaming. Seems a bug at em28xx_set_fmt | |
1691 | */ | |
1692 | ||
1693 | if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1694 | if (unlikely(res_get(fh))) | |
1695 | return -EBUSY; | |
1696 | ||
1697 | return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, | |
1698 | filp->f_flags & O_NONBLOCK); | |
1699 | } | |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * em28xx_v4l2_poll() | |
1705 | * will allocate buffers when called for the first time | |
1706 | */ | |
1707 | static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) | |
1708 | { | |
1709 | struct em28xx_fh *fh = filp->private_data; | |
1710 | struct em28xx *dev = fh->dev; | |
1711 | int rc; | |
1712 | ||
1713 | rc = check_dev(dev); | |
1714 | if (rc < 0) | |
1715 | return rc; | |
1716 | ||
1717 | if (unlikely(res_get(fh) < 0)) | |
1718 | return POLLERR; | |
1719 | ||
1720 | if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) | |
1721 | return POLLERR; | |
1722 | ||
1723 | return videobuf_poll_stream(filp, &fh->vb_vidq, wait); | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * em28xx_v4l2_mmap() | |
1728 | */ | |
1729 | static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) | |
1730 | { | |
1731 | struct em28xx_fh *fh = filp->private_data; | |
1732 | struct em28xx *dev = fh->dev; | |
1733 | int rc; | |
1734 | ||
1735 | if (unlikely(res_get(fh) < 0)) | |
1736 | return -EBUSY; | |
1737 | ||
1738 | rc = check_dev(dev); | |
1739 | if (rc < 0) | |
1740 | return rc; | |
1741 | ||
1742 | rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); | |
1743 | ||
1744 | em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", | |
1745 | (unsigned long)vma->vm_start, | |
1746 | (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, | |
1747 | rc); | |
1748 | ||
1749 | return rc; | |
1750 | } | |
1751 | ||
1752 | static const struct file_operations em28xx_v4l_fops = { | |
1753 | .owner = THIS_MODULE, | |
1754 | .open = em28xx_v4l2_open, | |
1755 | .release = em28xx_v4l2_close, | |
1756 | .read = em28xx_v4l2_read, | |
1757 | .poll = em28xx_v4l2_poll, | |
1758 | .mmap = em28xx_v4l2_mmap, | |
1759 | .ioctl = video_ioctl2, | |
1760 | .llseek = no_llseek, | |
1761 | .compat_ioctl = v4l_compat_ioctl32, | |
1762 | }; | |
1763 | ||
1764 | static const struct file_operations radio_fops = { | |
1765 | .owner = THIS_MODULE, | |
1766 | .open = em28xx_v4l2_open, | |
1767 | .release = em28xx_v4l2_close, | |
1768 | .ioctl = video_ioctl2, | |
1769 | .compat_ioctl = v4l_compat_ioctl32, | |
1770 | .llseek = no_llseek, | |
1771 | }; | |
1772 | ||
1773 | static const struct video_device em28xx_video_template = { | |
1774 | .fops = &em28xx_v4l_fops, | |
1775 | .release = video_device_release, | |
1776 | ||
1777 | .minor = -1, | |
1778 | .vidioc_querycap = vidioc_querycap, | |
1779 | .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap, | |
1780 | .vidioc_g_fmt_cap = vidioc_g_fmt_cap, | |
1781 | .vidioc_try_fmt_cap = vidioc_try_fmt_cap, | |
1782 | .vidioc_s_fmt_cap = vidioc_s_fmt_cap, | |
1783 | .vidioc_g_audio = vidioc_g_audio, | |
1784 | .vidioc_s_audio = vidioc_s_audio, | |
1785 | .vidioc_cropcap = vidioc_cropcap, | |
1786 | ||
1787 | .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture, | |
1788 | .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture, | |
1789 | .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture, | |
1790 | ||
1791 | .vidioc_reqbufs = vidioc_reqbufs, | |
1792 | .vidioc_querybuf = vidioc_querybuf, | |
1793 | .vidioc_qbuf = vidioc_qbuf, | |
1794 | .vidioc_dqbuf = vidioc_dqbuf, | |
1795 | .vidioc_s_std = vidioc_s_std, | |
1796 | .vidioc_enum_input = vidioc_enum_input, | |
1797 | .vidioc_g_input = vidioc_g_input, | |
1798 | .vidioc_s_input = vidioc_s_input, | |
1799 | .vidioc_queryctrl = vidioc_queryctrl, | |
1800 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1801 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1802 | .vidioc_streamon = vidioc_streamon, | |
1803 | .vidioc_streamoff = vidioc_streamoff, | |
1804 | .vidioc_g_tuner = vidioc_g_tuner, | |
1805 | .vidioc_s_tuner = vidioc_s_tuner, | |
1806 | .vidioc_g_frequency = vidioc_g_frequency, | |
1807 | .vidioc_s_frequency = vidioc_s_frequency, | |
1808 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1809 | .vidioc_g_register = vidioc_g_register, | |
1810 | .vidioc_s_register = vidioc_s_register, | |
1811 | #endif | |
1812 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1813 | .vidiocgmbuf = vidiocgmbuf, | |
1814 | #endif | |
1815 | ||
1816 | .tvnorms = V4L2_STD_ALL, | |
1817 | .current_norm = V4L2_STD_PAL, | |
1818 | }; | |
1819 | ||
1820 | static struct video_device em28xx_radio_template = { | |
1821 | .name = "em28xx-radio", | |
1822 | .type = VID_TYPE_TUNER, | |
1823 | .fops = &radio_fops, | |
1824 | .minor = -1, | |
1825 | .vidioc_querycap = radio_querycap, | |
1826 | .vidioc_g_tuner = radio_g_tuner, | |
1827 | .vidioc_enum_input = radio_enum_input, | |
1828 | .vidioc_g_audio = radio_g_audio, | |
1829 | .vidioc_s_tuner = radio_s_tuner, | |
1830 | .vidioc_s_audio = radio_s_audio, | |
1831 | .vidioc_s_input = radio_s_input, | |
1832 | .vidioc_queryctrl = radio_queryctrl, | |
1833 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1834 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1835 | .vidioc_g_frequency = vidioc_g_frequency, | |
1836 | .vidioc_s_frequency = vidioc_s_frequency, | |
1837 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1838 | .vidioc_g_register = vidioc_g_register, | |
1839 | .vidioc_s_register = vidioc_s_register, | |
1840 | #endif | |
1841 | }; | |
1842 | ||
1843 | /******************************** usb interface ******************************/ | |
1844 | ||
1845 | ||
1846 | static LIST_HEAD(em28xx_extension_devlist); | |
1847 | static DEFINE_MUTEX(em28xx_extension_devlist_lock); | |
1848 | ||
1849 | int em28xx_register_extension(struct em28xx_ops *ops) | |
1850 | { | |
1851 | struct em28xx *dev = NULL; | |
1852 | ||
1853 | mutex_lock(&em28xx_extension_devlist_lock); | |
1854 | list_add_tail(&ops->next, &em28xx_extension_devlist); | |
1855 | list_for_each_entry(dev, &em28xx_devlist, devlist) { | |
1856 | if (dev) | |
1857 | ops->init(dev); | |
1858 | } | |
1859 | printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name); | |
1860 | mutex_unlock(&em28xx_extension_devlist_lock); | |
1861 | return 0; | |
1862 | } | |
1863 | EXPORT_SYMBOL(em28xx_register_extension); | |
1864 | ||
1865 | void em28xx_unregister_extension(struct em28xx_ops *ops) | |
1866 | { | |
1867 | struct em28xx *dev = NULL; | |
1868 | ||
1869 | list_for_each_entry(dev, &em28xx_devlist, devlist) { | |
1870 | if (dev) | |
1871 | ops->fini(dev); | |
1872 | } | |
1873 | ||
1874 | mutex_lock(&em28xx_extension_devlist_lock); | |
1875 | printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name); | |
1876 | list_del(&ops->next); | |
1877 | mutex_unlock(&em28xx_extension_devlist_lock); | |
1878 | } | |
1879 | EXPORT_SYMBOL(em28xx_unregister_extension); | |
1880 | ||
1881 | static struct video_device *em28xx_vdev_init(struct em28xx *dev, | |
1882 | const struct video_device *template, | |
1883 | const int type, | |
1884 | const char *type_name) | |
1885 | { | |
1886 | struct video_device *vfd; | |
1887 | ||
1888 | vfd = video_device_alloc(); | |
1889 | if (NULL == vfd) | |
1890 | return NULL; | |
1891 | *vfd = *template; | |
1892 | vfd->minor = -1; | |
1893 | vfd->dev = &dev->udev->dev; | |
1894 | vfd->release = video_device_release; | |
1895 | vfd->type = type; | |
1896 | vfd->debug = video_debug; | |
1897 | ||
1898 | snprintf(vfd->name, sizeof(vfd->name), "%s %s", | |
1899 | dev->name, type_name); | |
1900 | ||
1901 | return vfd; | |
1902 | } | |
1903 | ||
1904 | ||
1905 | /* | |
1906 | * em28xx_init_dev() | |
1907 | * allocates and inits the device structs, registers i2c bus and v4l device | |
1908 | */ | |
1909 | static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, | |
1910 | int minor) | |
1911 | { | |
1912 | struct em28xx_ops *ops = NULL; | |
1913 | struct em28xx *dev = *devhandle; | |
1914 | int retval = -ENOMEM; | |
1915 | int errCode; | |
1916 | unsigned int maxh, maxw; | |
1917 | ||
1918 | dev->udev = udev; | |
1919 | mutex_init(&dev->lock); | |
1920 | spin_lock_init(&dev->slock); | |
1921 | init_waitqueue_head(&dev->open); | |
1922 | init_waitqueue_head(&dev->wait_frame); | |
1923 | init_waitqueue_head(&dev->wait_stream); | |
1924 | ||
1925 | dev->em28xx_write_regs = em28xx_write_regs; | |
1926 | dev->em28xx_read_reg = em28xx_read_reg; | |
1927 | dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len; | |
1928 | dev->em28xx_write_regs_req = em28xx_write_regs_req; | |
1929 | dev->em28xx_read_reg_req = em28xx_read_reg_req; | |
1930 | dev->is_em2800 = em28xx_boards[dev->model].is_em2800; | |
1931 | ||
1932 | em28xx_pre_card_setup(dev); | |
1933 | ||
1934 | errCode = em28xx_config(dev); | |
1935 | if (errCode) { | |
1936 | em28xx_errdev("error configuring device\n"); | |
1937 | em28xx_devused &= ~(1<<dev->devno); | |
1938 | kfree(dev); | |
1939 | return -ENOMEM; | |
1940 | } | |
1941 | ||
1942 | /* register i2c bus */ | |
1943 | em28xx_i2c_register(dev); | |
1944 | ||
1945 | /* Do board specific init and eeprom reading */ | |
1946 | em28xx_card_setup(dev); | |
1947 | ||
1948 | /* Configure audio */ | |
1949 | em28xx_audio_analog_set(dev); | |
1950 | ||
1951 | /* configure the device */ | |
1952 | em28xx_config_i2c(dev); | |
1953 | ||
1954 | /* set default norm */ | |
1955 | dev->norm = em28xx_video_template.current_norm; | |
1956 | ||
1957 | maxw = norm_maxw(dev); | |
1958 | maxh = norm_maxh(dev); | |
1959 | ||
1960 | /* set default image size */ | |
1961 | dev->width = maxw; | |
1962 | dev->height = maxh; | |
1963 | dev->interlaced = EM28XX_INTERLACED_DEFAULT; | |
1964 | dev->hscale = 0; | |
1965 | dev->vscale = 0; | |
1966 | dev->ctl_input = 2; | |
1967 | ||
1968 | errCode = em28xx_config(dev); | |
1969 | ||
1970 | list_add_tail(&dev->devlist, &em28xx_devlist); | |
1971 | ||
1972 | /* allocate and fill video video_device struct */ | |
1973 | dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, | |
1974 | VID_TYPE_CAPTURE, "video"); | |
1975 | if (NULL == dev->vdev) { | |
1976 | em28xx_errdev("cannot allocate video_device.\n"); | |
1977 | goto fail_unreg; | |
1978 | } | |
1979 | if (dev->tuner_type != TUNER_ABSENT) | |
1980 | dev->vdev->type |= VID_TYPE_TUNER; | |
1981 | ||
1982 | /* register v4l2 video video_device */ | |
1983 | retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, | |
1984 | video_nr[dev->devno]); | |
1985 | if (retval) { | |
1986 | em28xx_errdev("unable to register video device (error=%i).\n", | |
1987 | retval); | |
1988 | goto fail_unreg; | |
1989 | } | |
1990 | ||
1991 | /* Allocate and fill vbi video_device struct */ | |
1992 | dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, | |
1993 | VFL_TYPE_VBI, "vbi"); | |
1994 | /* register v4l2 vbi video_device */ | |
1995 | if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI, | |
1996 | vbi_nr[dev->devno]) < 0) { | |
1997 | em28xx_errdev("unable to register vbi device\n"); | |
1998 | retval = -ENODEV; | |
1999 | goto fail_unreg; | |
2000 | } | |
2001 | ||
2002 | if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { | |
2003 | dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, | |
2004 | VFL_TYPE_RADIO, "radio"); | |
2005 | if (NULL == dev->radio_dev) { | |
2006 | em28xx_errdev("cannot allocate video_device.\n"); | |
2007 | goto fail_unreg; | |
2008 | } | |
2009 | retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO, | |
2010 | radio_nr[dev->devno]); | |
2011 | if (retval < 0) { | |
2012 | em28xx_errdev("can't register radio device\n"); | |
2013 | goto fail_unreg; | |
2014 | } | |
2015 | em28xx_info("Registered radio device as /dev/radio%d\n", | |
2016 | dev->radio_dev->minor & 0x1f); | |
2017 | } | |
2018 | ||
2019 | /* init video dma queues */ | |
2020 | INIT_LIST_HEAD(&dev->vidq.active); | |
2021 | INIT_LIST_HEAD(&dev->vidq.queued); | |
2022 | ||
2023 | ||
2024 | if (dev->has_msp34xx) { | |
2025 | /* Send a reset to other chips via gpio */ | |
2026 | em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); | |
2027 | msleep(3); | |
2028 | em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); | |
2029 | msleep(3); | |
2030 | } | |
2031 | ||
2032 | video_mux(dev, 0); | |
2033 | ||
2034 | em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n", | |
2035 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, | |
2036 | dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); | |
2037 | ||
2038 | mutex_lock(&em28xx_extension_devlist_lock); | |
2039 | if (!list_empty(&em28xx_extension_devlist)) { | |
2040 | list_for_each_entry(ops, &em28xx_extension_devlist, next) { | |
2041 | if (ops->id) | |
2042 | ops->init(dev); | |
2043 | } | |
2044 | } | |
2045 | mutex_unlock(&em28xx_extension_devlist_lock); | |
2046 | ||
2047 | return 0; | |
2048 | ||
2049 | fail_unreg: | |
2050 | em28xx_release_resources(dev); | |
2051 | mutex_unlock(&dev->lock); | |
2052 | kfree(dev); | |
2053 | return retval; | |
2054 | } | |
2055 | ||
2056 | #if defined(CONFIG_MODULES) && defined(MODULE) | |
2057 | static void request_module_async(struct work_struct *work) | |
2058 | { | |
2059 | struct em28xx *dev = container_of(work, | |
2060 | struct em28xx, request_module_wk); | |
2061 | ||
2062 | if (dev->has_audio_class) | |
2063 | request_module("snd-usb-audio"); | |
2064 | else | |
2065 | request_module("em28xx-alsa"); | |
2066 | ||
2067 | if (dev->has_dvb) | |
2068 | request_module("em28xx-dvb"); | |
2069 | } | |
2070 | ||
2071 | static void request_modules(struct em28xx *dev) | |
2072 | { | |
2073 | INIT_WORK(&dev->request_module_wk, request_module_async); | |
2074 | schedule_work(&dev->request_module_wk); | |
2075 | } | |
2076 | #else | |
2077 | #define request_modules(dev) | |
2078 | #endif /* CONFIG_MODULES */ | |
2079 | ||
2080 | /* | |
2081 | * em28xx_usb_probe() | |
2082 | * checks for supported devices | |
2083 | */ | |
2084 | static int em28xx_usb_probe(struct usb_interface *interface, | |
2085 | const struct usb_device_id *id) | |
2086 | { | |
2087 | const struct usb_endpoint_descriptor *endpoint; | |
2088 | struct usb_device *udev; | |
2089 | struct usb_interface *uif; | |
2090 | struct em28xx *dev = NULL; | |
2091 | int retval = -ENODEV; | |
2092 | int i, nr, ifnum; | |
2093 | ||
2094 | udev = usb_get_dev(interface_to_usbdev(interface)); | |
2095 | ifnum = interface->altsetting[0].desc.bInterfaceNumber; | |
2096 | ||
2097 | /* Check to see next free device and mark as used */ | |
2098 | nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS); | |
2099 | em28xx_devused |= 1<<nr; | |
2100 | ||
2101 | /* Don't register audio interfaces */ | |
2102 | if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { | |
2103 | em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", | |
2104 | udev->descriptor.idVendor, | |
2105 | udev->descriptor.idProduct, | |
2106 | ifnum, | |
2107 | interface->altsetting[0].desc.bInterfaceClass); | |
2108 | ||
2109 | em28xx_devused &= ~(1<<nr); | |
2110 | return -ENODEV; | |
2111 | } | |
2112 | ||
2113 | em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n", | |
2114 | udev->descriptor.idVendor, | |
2115 | udev->descriptor.idProduct, | |
2116 | ifnum, | |
2117 | interface->altsetting[0].desc.bInterfaceClass); | |
2118 | ||
2119 | endpoint = &interface->cur_altsetting->endpoint[1].desc; | |
2120 | ||
2121 | /* check if the device has the iso in endpoint at the correct place */ | |
2122 | if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != | |
2123 | USB_ENDPOINT_XFER_ISOC) { | |
2124 | em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); | |
2125 | em28xx_devused &= ~(1<<nr); | |
2126 | return -ENODEV; | |
2127 | } | |
2128 | if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { | |
2129 | em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); | |
2130 | em28xx_devused &= ~(1<<nr); | |
2131 | return -ENODEV; | |
2132 | } | |
2133 | ||
2134 | if (nr >= EM28XX_MAXBOARDS) { | |
2135 | printk(DRIVER_NAME ": Supports only %i em28xx boards.\n", | |
2136 | EM28XX_MAXBOARDS); | |
2137 | em28xx_devused &= ~(1<<nr); | |
2138 | return -ENOMEM; | |
2139 | } | |
2140 | ||
2141 | /* allocate memory for our device state and initialize it */ | |
2142 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
2143 | if (dev == NULL) { | |
2144 | em28xx_err(DRIVER_NAME ": out of memory!\n"); | |
2145 | em28xx_devused &= ~(1<<nr); | |
2146 | return -ENOMEM; | |
2147 | } | |
2148 | ||
2149 | snprintf(dev->name, 29, "em28xx #%d", nr); | |
2150 | dev->devno = nr; | |
2151 | dev->model = id->driver_info; | |
2152 | dev->alt = -1; | |
2153 | ||
2154 | /* Checks if audio is provided by some interface */ | |
2155 | for (i = 0; i < udev->config->desc.bNumInterfaces; i++) { | |
2156 | uif = udev->config->interface[i]; | |
2157 | if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { | |
2158 | dev->has_audio_class = 1; | |
2159 | break; | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | printk(KERN_INFO DRIVER_NAME " %s usb audio class\n", | |
2164 | dev->has_audio_class ? "Has" : "Doesn't have"); | |
2165 | ||
2166 | /* compute alternate max packet sizes */ | |
2167 | uif = udev->actconfig->interface[0]; | |
2168 | ||
2169 | dev->num_alt = uif->num_altsetting; | |
2170 | em28xx_info("Alternate settings: %i\n", dev->num_alt); | |
2171 | /* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */ | |
2172 | dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL); | |
2173 | ||
2174 | if (dev->alt_max_pkt_size == NULL) { | |
2175 | em28xx_errdev("out of memory!\n"); | |
2176 | em28xx_devused &= ~(1<<nr); | |
2177 | kfree(dev); | |
2178 | return -ENOMEM; | |
2179 | } | |
2180 | ||
2181 | for (i = 0; i < dev->num_alt ; i++) { | |
2182 | u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. | |
2183 | wMaxPacketSize); | |
2184 | dev->alt_max_pkt_size[i] = | |
2185 | (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); | |
2186 | em28xx_info("Alternate setting %i, max size= %i\n", i, | |
2187 | dev->alt_max_pkt_size[i]); | |
2188 | } | |
2189 | ||
2190 | if ((card[nr] >= 0) && (card[nr] < em28xx_bcount)) | |
2191 | dev->model = card[nr]; | |
2192 | ||
2193 | /* allocate device struct */ | |
2194 | retval = em28xx_init_dev(&dev, udev, nr); | |
2195 | if (retval) | |
2196 | return retval; | |
2197 | ||
2198 | em28xx_info("Found %s\n", em28xx_boards[dev->model].name); | |
2199 | ||
2200 | /* save our data pointer in this interface device */ | |
2201 | usb_set_intfdata(interface, dev); | |
2202 | ||
2203 | request_modules(dev); | |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
2208 | /* | |
2209 | * em28xx_usb_disconnect() | |
2210 | * called when the device gets diconencted | |
2211 | * video device will be unregistered on v4l2_close in case it is still open | |
2212 | */ | |
2213 | static void em28xx_usb_disconnect(struct usb_interface *interface) | |
2214 | { | |
2215 | struct em28xx *dev; | |
2216 | struct em28xx_ops *ops = NULL; | |
2217 | ||
2218 | dev = usb_get_intfdata(interface); | |
2219 | usb_set_intfdata(interface, NULL); | |
2220 | ||
2221 | if (!dev) | |
2222 | return; | |
2223 | ||
2224 | em28xx_info("disconnecting %s\n", dev->vdev->name); | |
2225 | ||
2226 | /* wait until all current v4l2 io is finished then deallocate | |
2227 | resources */ | |
2228 | mutex_lock(&dev->lock); | |
2229 | ||
2230 | wake_up_interruptible_all(&dev->open); | |
2231 | ||
2232 | if (dev->users) { | |
2233 | em28xx_warn | |
2234 | ("device /dev/video%d is open! Deregistration and memory " | |
2235 | "deallocation are deferred on close.\n", | |
2236 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); | |
2237 | ||
2238 | dev->state |= DEV_MISCONFIGURED; | |
2239 | em28xx_uninit_isoc(dev); | |
2240 | dev->state |= DEV_DISCONNECTED; | |
2241 | wake_up_interruptible(&dev->wait_frame); | |
2242 | wake_up_interruptible(&dev->wait_stream); | |
2243 | } else { | |
2244 | dev->state |= DEV_DISCONNECTED; | |
2245 | em28xx_release_resources(dev); | |
2246 | } | |
2247 | mutex_unlock(&dev->lock); | |
2248 | ||
2249 | mutex_lock(&em28xx_extension_devlist_lock); | |
2250 | if (!list_empty(&em28xx_extension_devlist)) { | |
2251 | list_for_each_entry(ops, &em28xx_extension_devlist, next) { | |
2252 | ops->fini(dev); | |
2253 | } | |
2254 | } | |
2255 | mutex_unlock(&em28xx_extension_devlist_lock); | |
2256 | ||
2257 | if (!dev->users) { | |
2258 | kfree(dev->alt_max_pkt_size); | |
2259 | kfree(dev); | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | static struct usb_driver em28xx_usb_driver = { | |
2264 | .name = "em28xx", | |
2265 | .probe = em28xx_usb_probe, | |
2266 | .disconnect = em28xx_usb_disconnect, | |
2267 | .id_table = em28xx_id_table, | |
2268 | }; | |
2269 | ||
2270 | static int __init em28xx_module_init(void) | |
2271 | { | |
2272 | int result; | |
2273 | ||
2274 | printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", | |
2275 | (EM28XX_VERSION_CODE >> 16) & 0xff, | |
2276 | (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff); | |
2277 | #ifdef SNAPSHOT | |
2278 | printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n", | |
2279 | SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100); | |
2280 | #endif | |
2281 | ||
2282 | /* register this driver with the USB subsystem */ | |
2283 | result = usb_register(&em28xx_usb_driver); | |
2284 | if (result) | |
2285 | em28xx_err(DRIVER_NAME | |
2286 | " usb_register failed. Error number %d.\n", result); | |
2287 | ||
2288 | return result; | |
2289 | } | |
2290 | ||
2291 | static void __exit em28xx_module_exit(void) | |
2292 | { | |
2293 | /* deregister this driver with the USB subsystem */ | |
2294 | usb_deregister(&em28xx_usb_driver); | |
2295 | } | |
2296 | ||
2297 | module_init(em28xx_module_init); | |
2298 | module_exit(em28xx_module_exit); |