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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / media / video / em28xx / em28xx-video.c
blob3a1dfb7726f8d8919dd1ff9a08505d582de6f2b8
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/v4l2-ioctl.h>
42 #include <media/v4l2-chip-ident.h>
43 #include <media/msp3400.h>
44 #include <media/tuner.h>
45
46 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
47 "Markus Rechberger <mrechberger@gmail.com>, " \
48 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
49 "Sascha Sommer <saschasommer@freenet.de>"
50
51 #define DRIVER_DESC "Empia em28xx based USB video device driver"
52 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 2)
53
54 #define em28xx_videodbg(fmt, arg...) do {\
55 if (video_debug) \
56 printk(KERN_INFO "%s %s :"fmt, \
57 dev->name, __func__ , ##arg); } while (0)
58
59 static unsigned int isoc_debug;
60 module_param(isoc_debug, int, 0644);
61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
62
63 #define em28xx_isocdbg(fmt, arg...) \
64 do {\
65 if (isoc_debug) { \
66 printk(KERN_INFO "%s %s :"fmt, \
67 dev->name, __func__ , ##arg); \
68 } \
69 } while (0)
70
71 MODULE_AUTHOR(DRIVER_AUTHOR);
72 MODULE_DESCRIPTION(DRIVER_DESC);
73 MODULE_LICENSE("GPL");
74
75 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
76 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
77 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
78
79 module_param_array(video_nr, int, NULL, 0444);
80 module_param_array(vbi_nr, int, NULL, 0444);
81 module_param_array(radio_nr, int, NULL, 0444);
82 MODULE_PARM_DESC(video_nr, "video device numbers");
83 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
84 MODULE_PARM_DESC(radio_nr, "radio device numbers");
85
86 static unsigned int video_debug;
87 module_param(video_debug, int, 0644);
88 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
89
90 /* supported video standards */
91 static struct em28xx_fmt format[] = {
92 {
93 .name = "16 bpp YUY2, 4:2:2, packed",
94 .fourcc = V4L2_PIX_FMT_YUYV,
95 .depth = 16,
96 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
97 }, {
98 .name = "16 bpp RGB 565, LE",
99 .fourcc = V4L2_PIX_FMT_RGB565,
100 .depth = 16,
101 .reg = EM28XX_OUTFMT_RGB_16_656,
102 }, {
103 .name = "8 bpp Bayer BGBG..GRGR",
104 .fourcc = V4L2_PIX_FMT_SBGGR8,
105 .depth = 8,
106 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
107 }, {
108 .name = "8 bpp Bayer GRGR..BGBG",
109 .fourcc = V4L2_PIX_FMT_SGRBG8,
110 .depth = 8,
111 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
112 }, {
113 .name = "8 bpp Bayer GBGB..RGRG",
114 .fourcc = V4L2_PIX_FMT_SGBRG8,
115 .depth = 8,
116 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
117 }, {
118 .name = "12 bpp YUV411",
119 .fourcc = V4L2_PIX_FMT_YUV411P,
120 .depth = 12,
121 .reg = EM28XX_OUTFMT_YUV411,
122 },
123 };
124
125 /* supported controls */
126 /* Common to all boards */
127 static struct v4l2_queryctrl ac97_qctrl[] = {
128 {
129 .id = V4L2_CID_AUDIO_VOLUME,
130 .type = V4L2_CTRL_TYPE_INTEGER,
131 .name = "Volume",
132 .minimum = 0x0,
133 .maximum = 0x1f,
134 .step = 0x1,
135 .default_value = 0x1f,
136 .flags = V4L2_CTRL_FLAG_SLIDER,
137 }, {
138 .id = V4L2_CID_AUDIO_MUTE,
139 .type = V4L2_CTRL_TYPE_BOOLEAN,
140 .name = "Mute",
141 .minimum = 0,
142 .maximum = 1,
143 .step = 1,
144 .default_value = 1,
145 .flags = 0,
146 }
147 };
148
149 /* ------------------------------------------------------------------
150 DMA and thread functions
151 ------------------------------------------------------------------*/
152
153 /*
154 * Announces that a buffer were filled and request the next
155 */
156 static inline void buffer_filled(struct em28xx *dev,
157 struct em28xx_dmaqueue *dma_q,
158 struct em28xx_buffer *buf)
159 {
160 /* Advice that buffer was filled */
161 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
162 buf->vb.state = VIDEOBUF_DONE;
163 buf->vb.field_count++;
164 do_gettimeofday(&buf->vb.ts);
165
166 dev->isoc_ctl.vid_buf = NULL;
167
168 list_del(&buf->vb.queue);
169 wake_up(&buf->vb.done);
170 }
171
172 static inline void vbi_buffer_filled(struct em28xx *dev,
173 struct em28xx_dmaqueue *dma_q,
174 struct em28xx_buffer *buf)
175 {
176 /* Advice that buffer was filled */
177 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
178
179 buf->vb.state = VIDEOBUF_DONE;
180 buf->vb.field_count++;
181 do_gettimeofday(&buf->vb.ts);
182
183 dev->isoc_ctl.vbi_buf = NULL;
184
185 list_del(&buf->vb.queue);
186 wake_up(&buf->vb.done);
187 }
188
189 /*
190 * Identify the buffer header type and properly handles
191 */
192 static void em28xx_copy_video(struct em28xx *dev,
193 struct em28xx_dmaqueue *dma_q,
194 struct em28xx_buffer *buf,
195 unsigned char *p,
196 unsigned char *outp, unsigned long len)
197 {
198 void *fieldstart, *startwrite, *startread;
199 int linesdone, currlinedone, offset, lencopy, remain;
200 int bytesperline = dev->width << 1;
201
202 if (dma_q->pos + len > buf->vb.size)
203 len = buf->vb.size - dma_q->pos;
204
205 if (p[0] != 0x88 && p[0] != 0x22) {
206 em28xx_isocdbg("frame is not complete\n");
207 len += 4;
208 } else
209 p += 4;
210
211 startread = p;
212 remain = len;
213
214 if (dev->progressive)
215 fieldstart = outp;
216 else {
217 /* Interlaces two half frames */
218 if (buf->top_field)
219 fieldstart = outp;
220 else
221 fieldstart = outp + bytesperline;
222 }
223
224 linesdone = dma_q->pos / bytesperline;
225 currlinedone = dma_q->pos % bytesperline;
226
227 if (dev->progressive)
228 offset = linesdone * bytesperline + currlinedone;
229 else
230 offset = linesdone * bytesperline * 2 + currlinedone;
231
232 startwrite = fieldstart + offset;
233 lencopy = bytesperline - currlinedone;
234 lencopy = lencopy > remain ? remain : lencopy;
235
236 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
237 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
238 ((char *)startwrite + lencopy) -
239 ((char *)outp + buf->vb.size));
240 remain = (char *)outp + buf->vb.size - (char *)startwrite;
241 lencopy = remain;
242 }
243 if (lencopy <= 0)
244 return;
245 memcpy(startwrite, startread, lencopy);
246
247 remain -= lencopy;
248
249 while (remain > 0) {
250 startwrite += lencopy + bytesperline;
251 startread += lencopy;
252 if (bytesperline > remain)
253 lencopy = remain;
254 else
255 lencopy = bytesperline;
256
257 if ((char *)startwrite + lencopy > (char *)outp +
258 buf->vb.size) {
259 em28xx_isocdbg("Overflow of %zi bytes past buffer end"
260 "(2)\n",
261 ((char *)startwrite + lencopy) -
262 ((char *)outp + buf->vb.size));
263 lencopy = remain = (char *)outp + buf->vb.size -
264 (char *)startwrite;
265 }
266 if (lencopy <= 0)
267 break;
268
269 memcpy(startwrite, startread, lencopy);
270
271 remain -= lencopy;
272 }
273
274 dma_q->pos += len;
275 }
276
277 static void em28xx_copy_vbi(struct em28xx *dev,
278 struct em28xx_dmaqueue *dma_q,
279 struct em28xx_buffer *buf,
280 unsigned char *p,
281 unsigned char *outp, unsigned long len)
282 {
283 void *startwrite, *startread;
284 int offset;
285 int bytesperline = 720;
286
287 if (dev == NULL) {
288 em28xx_isocdbg("dev is null\n");
289 return;
290 }
291
292 if (dma_q == NULL) {
293 em28xx_isocdbg("dma_q is null\n");
294 return;
295 }
296 if (buf == NULL) {
297 return;
298 }
299 if (p == NULL) {
300 em28xx_isocdbg("p is null\n");
301 return;
302 }
303 if (outp == NULL) {
304 em28xx_isocdbg("outp is null\n");
305 return;
306 }
307
308 if (dma_q->pos + len > buf->vb.size)
309 len = buf->vb.size - dma_q->pos;
310
311 if ((p[0] == 0x33 && p[1] == 0x95) ||
312 (p[0] == 0x88 && p[1] == 0x88)) {
313 /* Header field, advance past it */
314 p += 4;
315 } else {
316 len += 4;
317 }
318
319 startread = p;
320
321 startwrite = outp + dma_q->pos;
322 offset = dma_q->pos;
323
324 /* Make sure the bottom field populates the second half of the frame */
325 if (buf->top_field == 0) {
326 startwrite += bytesperline * 0x0c;
327 offset += bytesperline * 0x0c;
328 }
329
330 memcpy(startwrite, startread, len);
331 dma_q->pos += len;
332 }
333
334 static inline void print_err_status(struct em28xx *dev,
335 int packet, int status)
336 {
337 char *errmsg = "Unknown";
338
339 switch (status) {
340 case -ENOENT:
341 errmsg = "unlinked synchronuously";
342 break;
343 case -ECONNRESET:
344 errmsg = "unlinked asynchronuously";
345 break;
346 case -ENOSR:
347 errmsg = "Buffer error (overrun)";
348 break;
349 case -EPIPE:
350 errmsg = "Stalled (device not responding)";
351 break;
352 case -EOVERFLOW:
353 errmsg = "Babble (bad cable?)";
354 break;
355 case -EPROTO:
356 errmsg = "Bit-stuff error (bad cable?)";
357 break;
358 case -EILSEQ:
359 errmsg = "CRC/Timeout (could be anything)";
360 break;
361 case -ETIME:
362 errmsg = "Device does not respond";
363 break;
364 }
365 if (packet < 0) {
366 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
367 } else {
368 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
369 packet, status, errmsg);
370 }
371 }
372
373 /*
374 * video-buf generic routine to get the next available buffer
375 */
376 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
377 struct em28xx_buffer **buf)
378 {
379 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
380 char *outp;
381
382 if (list_empty(&dma_q->active)) {
383 em28xx_isocdbg("No active queue to serve\n");
384 dev->isoc_ctl.vid_buf = NULL;
385 *buf = NULL;
386 return;
387 }
388
389 /* Get the next buffer */
390 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
391
392 /* Cleans up buffer - Usefull for testing for frame/URB loss */
393 outp = videobuf_to_vmalloc(&(*buf)->vb);
394 memset(outp, 0, (*buf)->vb.size);
395
396 dev->isoc_ctl.vid_buf = *buf;
397
398 return;
399 }
400
401 /*
402 * video-buf generic routine to get the next available VBI buffer
403 */
404 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
405 struct em28xx_buffer **buf)
406 {
407 struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
408 char *outp;
409
410 if (list_empty(&dma_q->active)) {
411 em28xx_isocdbg("No active queue to serve\n");
412 dev->isoc_ctl.vbi_buf = NULL;
413 *buf = NULL;
414 return;
415 }
416
417 /* Get the next buffer */
418 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
419 /* Cleans up buffer - Usefull for testing for frame/URB loss */
420 outp = videobuf_to_vmalloc(&(*buf)->vb);
421 memset(outp, 0x00, (*buf)->vb.size);
422
423 dev->isoc_ctl.vbi_buf = *buf;
424
425 return;
426 }
427
428 /*
429 * Controls the isoc copy of each urb packet
430 */
431 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
432 {
433 struct em28xx_buffer *buf;
434 struct em28xx_dmaqueue *dma_q = &dev->vidq;
435 unsigned char *outp = NULL;
436 int i, len = 0, rc = 1;
437 unsigned char *p;
438
439 if (!dev)
440 return 0;
441
442 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
443 return 0;
444
445 if (urb->status < 0) {
446 print_err_status(dev, -1, urb->status);
447 if (urb->status == -ENOENT)
448 return 0;
449 }
450
451 buf = dev->isoc_ctl.vid_buf;
452 if (buf != NULL)
453 outp = videobuf_to_vmalloc(&buf->vb);
454
455 for (i = 0; i < urb->number_of_packets; i++) {
456 int status = urb->iso_frame_desc[i].status;
457
458 if (status < 0) {
459 print_err_status(dev, i, status);
460 if (urb->iso_frame_desc[i].status != -EPROTO)
461 continue;
462 }
463
464 len = urb->iso_frame_desc[i].actual_length - 4;
465
466 if (urb->iso_frame_desc[i].actual_length <= 0) {
467 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
468 continue;
469 }
470 if (urb->iso_frame_desc[i].actual_length >
471 dev->max_pkt_size) {
472 em28xx_isocdbg("packet bigger than packet size");
473 continue;
474 }
475
476 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
477
478 /* FIXME: incomplete buffer checks where removed to make
479 logic simpler. Impacts of those changes should be evaluated
480 */
481 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
482 em28xx_isocdbg("VBI HEADER!!!\n");
483 /* FIXME: Should add vbi copy */
484 continue;
485 }
486 if (p[0] == 0x22 && p[1] == 0x5a) {
487 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
488 len, (p[2] & 1) ? "odd" : "even");
489
490 if (dev->progressive || !(p[2] & 1)) {
491 if (buf != NULL)
492 buffer_filled(dev, dma_q, buf);
493 get_next_buf(dma_q, &buf);
494 if (buf == NULL)
495 outp = NULL;
496 else
497 outp = videobuf_to_vmalloc(&buf->vb);
498 }
499
500 if (buf != NULL) {
501 if (p[2] & 1)
502 buf->top_field = 0;
503 else
504 buf->top_field = 1;
505 }
506
507 dma_q->pos = 0;
508 }
509 if (buf != NULL)
510 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
511 }
512 return rc;
513 }
514
515 /* Version of isoc handler that takes into account a mixture of video and
516 VBI data */
517 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
518 {
519 struct em28xx_buffer *buf, *vbi_buf;
520 struct em28xx_dmaqueue *dma_q = &dev->vidq;
521 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
522 unsigned char *outp = NULL;
523 unsigned char *vbioutp = NULL;
524 int i, len = 0, rc = 1;
525 unsigned char *p;
526 int vbi_size;
527
528 if (!dev)
529 return 0;
530
531 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
532 return 0;
533
534 if (urb->status < 0) {
535 print_err_status(dev, -1, urb->status);
536 if (urb->status == -ENOENT)
537 return 0;
538 }
539
540 buf = dev->isoc_ctl.vid_buf;
541 if (buf != NULL)
542 outp = videobuf_to_vmalloc(&buf->vb);
543
544 vbi_buf = dev->isoc_ctl.vbi_buf;
545 if (vbi_buf != NULL)
546 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
547
548 for (i = 0; i < urb->number_of_packets; i++) {
549 int status = urb->iso_frame_desc[i].status;
550
551 if (status < 0) {
552 print_err_status(dev, i, status);
553 if (urb->iso_frame_desc[i].status != -EPROTO)
554 continue;
555 }
556
557 len = urb->iso_frame_desc[i].actual_length - 4;
558
559 if (urb->iso_frame_desc[i].actual_length <= 0) {
560 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
561 continue;
562 }
563 if (urb->iso_frame_desc[i].actual_length >
564 dev->max_pkt_size) {
565 em28xx_isocdbg("packet bigger than packet size");
566 continue;
567 }
568
569 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
570
571 /* capture type 0 = vbi start
572 capture type 1 = video start
573 capture type 2 = video in progress */
574 if (p[0] == 0x33 && p[1] == 0x95) {
575 dev->capture_type = 0;
576 dev->vbi_read = 0;
577 em28xx_isocdbg("VBI START HEADER!!!\n");
578 dev->cur_field = p[2];
579 }
580
581 /* FIXME: get rid of hard-coded value */
582 vbi_size = 720 * 0x0c;
583
584 if (dev->capture_type == 0) {
585 if (dev->vbi_read >= vbi_size) {
586 /* We've already read all the VBI data, so
587 treat the rest as video */
588 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
589 } else if ((dev->vbi_read + len) < vbi_size) {
590 /* This entire frame is VBI data */
591 if (dev->vbi_read == 0 &&
592 (!(dev->cur_field & 1))) {
593 /* Brand new frame */
594 if (vbi_buf != NULL)
595 vbi_buffer_filled(dev,
596 vbi_dma_q,
597 vbi_buf);
598 vbi_get_next_buf(vbi_dma_q, &vbi_buf);
599 if (vbi_buf == NULL)
600 vbioutp = NULL;
601 else
602 vbioutp = videobuf_to_vmalloc(
603 &vbi_buf->vb);
604 }
605
606 if (dev->vbi_read == 0) {
607 vbi_dma_q->pos = 0;
608 if (vbi_buf != NULL) {
609 if (dev->cur_field & 1)
610 vbi_buf->top_field = 0;
611 else
612 vbi_buf->top_field = 1;
613 }
614 }
615
616 dev->vbi_read += len;
617 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
618 vbioutp, len);
619 } else {
620 /* Some of this frame is VBI data and some is
621 video data */
622 int vbi_data_len = vbi_size - dev->vbi_read;
623 dev->vbi_read += vbi_data_len;
624 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
625 vbioutp, vbi_data_len);
626 dev->capture_type = 1;
627 p += vbi_data_len;
628 len -= vbi_data_len;
629 }
630 }
631
632 if (dev->capture_type == 1) {
633 dev->capture_type = 2;
634 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
635 len, (p[2] & 1) ? "odd" : "even");
636
637 if (dev->progressive || !(dev->cur_field & 1)) {
638 if (buf != NULL)
639 buffer_filled(dev, dma_q, buf);
640 get_next_buf(dma_q, &buf);
641 if (buf == NULL)
642 outp = NULL;
643 else
644 outp = videobuf_to_vmalloc(&buf->vb);
645 }
646 if (buf != NULL) {
647 if (dev->cur_field & 1)
648 buf->top_field = 0;
649 else
650 buf->top_field = 1;
651 }
652
653 dma_q->pos = 0;
654 }
655 if (buf != NULL && dev->capture_type == 2)
656 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
657 }
658 return rc;
659 }
660
661
662 /* ------------------------------------------------------------------
663 Videobuf operations
664 ------------------------------------------------------------------*/
665
666 static int
667 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
668 {
669 struct em28xx_fh *fh = vq->priv_data;
670 struct em28xx *dev = fh->dev;
671 struct v4l2_frequency f;
672
673 *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
674 >> 3;
675
676 if (0 == *count)
677 *count = EM28XX_DEF_BUF;
678
679 if (*count < EM28XX_MIN_BUF)
680 *count = EM28XX_MIN_BUF;
681
682 /* Ask tuner to go to analog or radio mode */
683 memset(&f, 0, sizeof(f));
684 f.frequency = dev->ctl_freq;
685 f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
686
687 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
688
689 return 0;
690 }
691
692 /* This is called *without* dev->slock held; please keep it that way */
693 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
694 {
695 struct em28xx_fh *fh = vq->priv_data;
696 struct em28xx *dev = fh->dev;
697 unsigned long flags = 0;
698 if (in_interrupt())
699 BUG();
700
701 /* We used to wait for the buffer to finish here, but this didn't work
702 because, as we were keeping the state as VIDEOBUF_QUEUED,
703 videobuf_queue_cancel marked it as finished for us.
704 (Also, it could wedge forever if the hardware was misconfigured.)
705
706 This should be safe; by the time we get here, the buffer isn't
707 queued anymore. If we ever start marking the buffers as
708 VIDEOBUF_ACTIVE, it won't be, though.
709 */
710 spin_lock_irqsave(&dev->slock, flags);
711 if (dev->isoc_ctl.vid_buf == buf)
712 dev->isoc_ctl.vid_buf = NULL;
713 spin_unlock_irqrestore(&dev->slock, flags);
714
715 videobuf_vmalloc_free(&buf->vb);
716 buf->vb.state = VIDEOBUF_NEEDS_INIT;
717 }
718
719 static int
720 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
721 enum v4l2_field field)
722 {
723 struct em28xx_fh *fh = vq->priv_data;
724 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
725 struct em28xx *dev = fh->dev;
726 int rc = 0, urb_init = 0;
727
728 buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
729 + 7) >> 3;
730
731 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
732 return -EINVAL;
733
734 buf->vb.width = dev->width;
735 buf->vb.height = dev->height;
736 buf->vb.field = field;
737
738 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
739 rc = videobuf_iolock(vq, &buf->vb, NULL);
740 if (rc < 0)
741 goto fail;
742 }
743
744 if (!dev->isoc_ctl.num_bufs)
745 urb_init = 1;
746
747 if (urb_init) {
748 if (em28xx_vbi_supported(dev) == 1)
749 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
750 EM28XX_NUM_BUFS,
751 dev->max_pkt_size,
752 em28xx_isoc_copy_vbi);
753 else
754 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
755 EM28XX_NUM_BUFS,
756 dev->max_pkt_size,
757 em28xx_isoc_copy);
758 if (rc < 0)
759 goto fail;
760 }
761
762 buf->vb.state = VIDEOBUF_PREPARED;
763 return 0;
764
765 fail:
766 free_buffer(vq, buf);
767 return rc;
768 }
769
770 static void
771 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
772 {
773 struct em28xx_buffer *buf = container_of(vb,
774 struct em28xx_buffer,
775 vb);
776 struct em28xx_fh *fh = vq->priv_data;
777 struct em28xx *dev = fh->dev;
778 struct em28xx_dmaqueue *vidq = &dev->vidq;
779
780 buf->vb.state = VIDEOBUF_QUEUED;
781 list_add_tail(&buf->vb.queue, &vidq->active);
782
783 }
784
785 static void buffer_release(struct videobuf_queue *vq,
786 struct videobuf_buffer *vb)
787 {
788 struct em28xx_buffer *buf = container_of(vb,
789 struct em28xx_buffer,
790 vb);
791 struct em28xx_fh *fh = vq->priv_data;
792 struct em28xx *dev = (struct em28xx *)fh->dev;
793
794 em28xx_isocdbg("em28xx: called buffer_release\n");
795
796 free_buffer(vq, buf);
797 }
798
799 static struct videobuf_queue_ops em28xx_video_qops = {
800 .buf_setup = buffer_setup,
801 .buf_prepare = buffer_prepare,
802 .buf_queue = buffer_queue,
803 .buf_release = buffer_release,
804 };
805
806 /********************* v4l2 interface **************************************/
807
808 static void video_mux(struct em28xx *dev, int index)
809 {
810 dev->ctl_input = index;
811 dev->ctl_ainput = INPUT(index)->amux;
812 dev->ctl_aoutput = INPUT(index)->aout;
813
814 if (!dev->ctl_aoutput)
815 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
816
817 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
818 INPUT(index)->vmux, 0, 0);
819
820 if (dev->board.has_msp34xx) {
821 if (dev->i2s_speed) {
822 v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
823 s_i2s_clock_freq, dev->i2s_speed);
824 }
825 /* Note: this is msp3400 specific */
826 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
827 dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
828 }
829
830 if (dev->board.adecoder != EM28XX_NOADECODER) {
831 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
832 dev->ctl_ainput, dev->ctl_aoutput, 0);
833 }
834
835 em28xx_audio_analog_set(dev);
836 }
837
838 /* Usage lock check functions */
839 static int res_get(struct em28xx_fh *fh, unsigned int bit)
840 {
841 struct em28xx *dev = fh->dev;
842
843 if (fh->resources & bit)
844 /* have it already allocated */
845 return 1;
846
847 /* is it free? */
848 mutex_lock(&dev->lock);
849 if (dev->resources & bit) {
850 /* no, someone else uses it */
851 mutex_unlock(&dev->lock);
852 return 0;
853 }
854 /* it's free, grab it */
855 fh->resources |= bit;
856 dev->resources |= bit;
857 em28xx_videodbg("res: get %d\n", bit);
858 mutex_unlock(&dev->lock);
859 return 1;
860 }
861
862 static int res_check(struct em28xx_fh *fh, unsigned int bit)
863 {
864 return fh->resources & bit;
865 }
866
867 static int res_locked(struct em28xx *dev, unsigned int bit)
868 {
869 return dev->resources & bit;
870 }
871
872 static void res_free(struct em28xx_fh *fh, unsigned int bits)
873 {
874 struct em28xx *dev = fh->dev;
875
876 BUG_ON((fh->resources & bits) != bits);
877
878 mutex_lock(&dev->lock);
879 fh->resources &= ~bits;
880 dev->resources &= ~bits;
881 em28xx_videodbg("res: put %d\n", bits);
882 mutex_unlock(&dev->lock);
883 }
884
885 static int get_ressource(struct em28xx_fh *fh)
886 {
887 switch (fh->type) {
888 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
889 return EM28XX_RESOURCE_VIDEO;
890 case V4L2_BUF_TYPE_VBI_CAPTURE:
891 return EM28XX_RESOURCE_VBI;
892 default:
893 BUG();
894 return 0;
895 }
896 }
897
898 /*
899 * ac97_queryctrl()
900 * return the ac97 supported controls
901 */
902 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
903 {
904 int i;
905
906 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
907 if (qc->id && qc->id == ac97_qctrl[i].id) {
908 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
909 return 0;
910 }
911 }
912
913 /* Control is not ac97 related */
914 return 1;
915 }
916
917 /*
918 * ac97_get_ctrl()
919 * return the current values for ac97 mute and volume
920 */
921 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
922 {
923 switch (ctrl->id) {
924 case V4L2_CID_AUDIO_MUTE:
925 ctrl->value = dev->mute;
926 return 0;
927 case V4L2_CID_AUDIO_VOLUME:
928 ctrl->value = dev->volume;
929 return 0;
930 default:
931 /* Control is not ac97 related */
932 return 1;
933 }
934 }
935
936 /*
937 * ac97_set_ctrl()
938 * set values for ac97 mute and volume
939 */
940 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
941 {
942 int i;
943
944 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
945 if (ctrl->id == ac97_qctrl[i].id)
946 goto handle;
947
948 /* Announce that hasn't handle it */
949 return 1;
950
951 handle:
952 if (ctrl->value < ac97_qctrl[i].minimum ||
953 ctrl->value > ac97_qctrl[i].maximum)
954 return -ERANGE;
955
956 switch (ctrl->id) {
957 case V4L2_CID_AUDIO_MUTE:
958 dev->mute = ctrl->value;
959 break;
960 case V4L2_CID_AUDIO_VOLUME:
961 dev->volume = ctrl->value;
962 break;
963 }
964
965 return em28xx_audio_analog_set(dev);
966 }
967
968 static int check_dev(struct em28xx *dev)
969 {
970 if (dev->state & DEV_DISCONNECTED) {
971 em28xx_errdev("v4l2 ioctl: device not present\n");
972 return -ENODEV;
973 }
974
975 if (dev->state & DEV_MISCONFIGURED) {
976 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
977 "close and open it again\n");
978 return -EIO;
979 }
980 return 0;
981 }
982
983 static void get_scale(struct em28xx *dev,
984 unsigned int width, unsigned int height,
985 unsigned int *hscale, unsigned int *vscale)
986 {
987 unsigned int maxw = norm_maxw(dev);
988 unsigned int maxh = norm_maxh(dev);
989
990 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
991 if (*hscale >= 0x4000)
992 *hscale = 0x3fff;
993
994 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
995 if (*vscale >= 0x4000)
996 *vscale = 0x3fff;
997 }
998
999 /* ------------------------------------------------------------------
1000 IOCTL vidioc handling
1001 ------------------------------------------------------------------*/
1002
1003 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1004 struct v4l2_format *f)
1005 {
1006 struct em28xx_fh *fh = priv;
1007 struct em28xx *dev = fh->dev;
1008
1009 mutex_lock(&dev->lock);
1010
1011 f->fmt.pix.width = dev->width;
1012 f->fmt.pix.height = dev->height;
1013 f->fmt.pix.pixelformat = dev->format->fourcc;
1014 f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1015 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
1016 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1017
1018 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1019 if (dev->progressive)
1020 f->fmt.pix.field = V4L2_FIELD_NONE;
1021 else
1022 f->fmt.pix.field = dev->interlaced ?
1023 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1024
1025 mutex_unlock(&dev->lock);
1026 return 0;
1027 }
1028
1029 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1030 {
1031 unsigned int i;
1032
1033 for (i = 0; i < ARRAY_SIZE(format); i++)
1034 if (format[i].fourcc == fourcc)
1035 return &format[i];
1036
1037 return NULL;
1038 }
1039
1040 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1041 struct v4l2_format *f)
1042 {
1043 struct em28xx_fh *fh = priv;
1044 struct em28xx *dev = fh->dev;
1045 unsigned int width = f->fmt.pix.width;
1046 unsigned int height = f->fmt.pix.height;
1047 unsigned int maxw = norm_maxw(dev);
1048 unsigned int maxh = norm_maxh(dev);
1049 unsigned int hscale, vscale;
1050 struct em28xx_fmt *fmt;
1051
1052 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1053 if (!fmt) {
1054 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1055 f->fmt.pix.pixelformat);
1056 return -EINVAL;
1057 }
1058
1059 if (dev->board.is_em2800) {
1060 /* the em2800 can only scale down to 50% */
1061 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1062 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1063 /* According to empiatech support the MaxPacketSize is too small
1064 * to support framesizes larger than 640x480 @ 30 fps or 640x576
1065 * @ 25 fps. As this would cut of a part of the image we prefer
1066 * 360x576 or 360x480 for now */
1067 if (width == maxw && height == maxh)
1068 width /= 2;
1069 } else {
1070 /* width must even because of the YUYV format
1071 height must be even because of interlacing */
1072 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1073 1, 0);
1074 }
1075
1076 get_scale(dev, width, height, &hscale, &vscale);
1077
1078 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1079 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1080
1081 f->fmt.pix.width = width;
1082 f->fmt.pix.height = height;
1083 f->fmt.pix.pixelformat = fmt->fourcc;
1084 f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1085 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1086 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1087 if (dev->progressive)
1088 f->fmt.pix.field = V4L2_FIELD_NONE;
1089 else
1090 f->fmt.pix.field = dev->interlaced ?
1091 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1092
1093 return 0;
1094 }
1095
1096 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1097 unsigned width, unsigned height)
1098 {
1099 struct em28xx_fmt *fmt;
1100
1101 fmt = format_by_fourcc(fourcc);
1102 if (!fmt)
1103 return -EINVAL;
1104
1105 dev->format = fmt;
1106 dev->width = width;
1107 dev->height = height;
1108
1109 /* set new image size */
1110 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1111
1112 em28xx_set_alternate(dev);
1113 em28xx_resolution_set(dev);
1114
1115 return 0;
1116 }
1117
1118 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1119 struct v4l2_format *f)
1120 {
1121 struct em28xx_fh *fh = priv;
1122 struct em28xx *dev = fh->dev;
1123 int rc;
1124
1125 rc = check_dev(dev);
1126 if (rc < 0)
1127 return rc;
1128
1129 mutex_lock(&dev->lock);
1130
1131 vidioc_try_fmt_vid_cap(file, priv, f);
1132
1133 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1134 em28xx_errdev("%s queue busy\n", __func__);
1135 rc = -EBUSY;
1136 goto out;
1137 }
1138
1139 rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1140 f->fmt.pix.width, f->fmt.pix.height);
1141
1142 out:
1143 mutex_unlock(&dev->lock);
1144 return rc;
1145 }
1146
1147 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1148 {
1149 struct em28xx_fh *fh = priv;
1150 struct em28xx *dev = fh->dev;
1151 int rc;
1152
1153 rc = check_dev(dev);
1154 if (rc < 0)
1155 return rc;
1156
1157 *norm = dev->norm;
1158
1159 return 0;
1160 }
1161
1162 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1163 {
1164 struct em28xx_fh *fh = priv;
1165 struct em28xx *dev = fh->dev;
1166 struct v4l2_format f;
1167 int rc;
1168
1169 rc = check_dev(dev);
1170 if (rc < 0)
1171 return rc;
1172
1173 mutex_lock(&dev->lock);
1174 dev->norm = *norm;
1175
1176 /* Adjusts width/height, if needed */
1177 f.fmt.pix.width = dev->width;
1178 f.fmt.pix.height = dev->height;
1179 vidioc_try_fmt_vid_cap(file, priv, &f);
1180
1181 /* set new image size */
1182 dev->width = f.fmt.pix.width;
1183 dev->height = f.fmt.pix.height;
1184 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1185
1186 em28xx_resolution_set(dev);
1187 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1188
1189 mutex_unlock(&dev->lock);
1190 return 0;
1191 }
1192
1193 static int vidioc_g_parm(struct file *file, void *priv,
1194 struct v4l2_streamparm *p)
1195 {
1196 struct em28xx_fh *fh = priv;
1197 struct em28xx *dev = fh->dev;
1198 int rc = 0;
1199
1200 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1201 return -EINVAL;
1202
1203 if (dev->board.is_webcam)
1204 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1205 video, g_parm, p);
1206 else
1207 v4l2_video_std_frame_period(dev->norm,
1208 &p->parm.capture.timeperframe);
1209
1210 return rc;
1211 }
1212
1213 static int vidioc_s_parm(struct file *file, void *priv,
1214 struct v4l2_streamparm *p)
1215 {
1216 struct em28xx_fh *fh = priv;
1217 struct em28xx *dev = fh->dev;
1218
1219 if (!dev->board.is_webcam)
1220 return -EINVAL;
1221
1222 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1223 return -EINVAL;
1224
1225 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1226 }
1227
1228 static const char *iname[] = {
1229 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1230 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1231 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1232 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1233 [EM28XX_VMUX_SVIDEO] = "S-Video",
1234 [EM28XX_VMUX_TELEVISION] = "Television",
1235 [EM28XX_VMUX_CABLE] = "Cable TV",
1236 [EM28XX_VMUX_DVB] = "DVB",
1237 [EM28XX_VMUX_DEBUG] = "for debug only",
1238 };
1239
1240 static int vidioc_enum_input(struct file *file, void *priv,
1241 struct v4l2_input *i)
1242 {
1243 struct em28xx_fh *fh = priv;
1244 struct em28xx *dev = fh->dev;
1245 unsigned int n;
1246
1247 n = i->index;
1248 if (n >= MAX_EM28XX_INPUT)
1249 return -EINVAL;
1250 if (0 == INPUT(n)->type)
1251 return -EINVAL;
1252
1253 i->index = n;
1254 i->type = V4L2_INPUT_TYPE_CAMERA;
1255
1256 strcpy(i->name, iname[INPUT(n)->type]);
1257
1258 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1259 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1260 i->type = V4L2_INPUT_TYPE_TUNER;
1261
1262 i->std = dev->vdev->tvnorms;
1263
1264 return 0;
1265 }
1266
1267 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1268 {
1269 struct em28xx_fh *fh = priv;
1270 struct em28xx *dev = fh->dev;
1271
1272 *i = dev->ctl_input;
1273
1274 return 0;
1275 }
1276
1277 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1278 {
1279 struct em28xx_fh *fh = priv;
1280 struct em28xx *dev = fh->dev;
1281 int rc;
1282
1283 rc = check_dev(dev);
1284 if (rc < 0)
1285 return rc;
1286
1287 if (i >= MAX_EM28XX_INPUT)
1288 return -EINVAL;
1289 if (0 == INPUT(i)->type)
1290 return -EINVAL;
1291
1292 dev->ctl_input = i;
1293
1294 mutex_lock(&dev->lock);
1295 video_mux(dev, dev->ctl_input);
1296 mutex_unlock(&dev->lock);
1297 return 0;
1298 }
1299
1300 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1301 {
1302 struct em28xx_fh *fh = priv;
1303 struct em28xx *dev = fh->dev;
1304
1305 if (!dev->audio_mode.has_audio)
1306 return -EINVAL;
1307
1308 switch (a->index) {
1309 case EM28XX_AMUX_VIDEO:
1310 strcpy(a->name, "Television");
1311 break;
1312 case EM28XX_AMUX_LINE_IN:
1313 strcpy(a->name, "Line In");
1314 break;
1315 case EM28XX_AMUX_VIDEO2:
1316 strcpy(a->name, "Television alt");
1317 break;
1318 case EM28XX_AMUX_PHONE:
1319 strcpy(a->name, "Phone");
1320 break;
1321 case EM28XX_AMUX_MIC:
1322 strcpy(a->name, "Mic");
1323 break;
1324 case EM28XX_AMUX_CD:
1325 strcpy(a->name, "CD");
1326 break;
1327 case EM28XX_AMUX_AUX:
1328 strcpy(a->name, "Aux");
1329 break;
1330 case EM28XX_AMUX_PCM_OUT:
1331 strcpy(a->name, "PCM");
1332 break;
1333 default:
1334 return -EINVAL;
1335 }
1336
1337 a->index = dev->ctl_ainput;
1338 a->capability = V4L2_AUDCAP_STEREO;
1339
1340 return 0;
1341 }
1342
1343 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1344 {
1345 struct em28xx_fh *fh = priv;
1346 struct em28xx *dev = fh->dev;
1347
1348
1349 if (!dev->audio_mode.has_audio)
1350 return -EINVAL;
1351
1352 if (a->index >= MAX_EM28XX_INPUT)
1353 return -EINVAL;
1354 if (0 == INPUT(a->index)->type)
1355 return -EINVAL;
1356
1357 mutex_lock(&dev->lock);
1358
1359 dev->ctl_ainput = INPUT(a->index)->amux;
1360 dev->ctl_aoutput = INPUT(a->index)->aout;
1361
1362 if (!dev->ctl_aoutput)
1363 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1364
1365 mutex_unlock(&dev->lock);
1366 return 0;
1367 }
1368
1369 static int vidioc_queryctrl(struct file *file, void *priv,
1370 struct v4l2_queryctrl *qc)
1371 {
1372 struct em28xx_fh *fh = priv;
1373 struct em28xx *dev = fh->dev;
1374 int id = qc->id;
1375 int rc;
1376
1377 rc = check_dev(dev);
1378 if (rc < 0)
1379 return rc;
1380
1381 memset(qc, 0, sizeof(*qc));
1382
1383 qc->id = id;
1384
1385 /* enumberate AC97 controls */
1386 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1387 rc = ac97_queryctrl(qc);
1388 if (!rc)
1389 return 0;
1390 }
1391
1392 /* enumberate V4L2 device controls */
1393 mutex_lock(&dev->lock);
1394 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1395 mutex_unlock(&dev->lock);
1396
1397 if (qc->type)
1398 return 0;
1399 else
1400 return -EINVAL;
1401 }
1402
1403 static int vidioc_g_ctrl(struct file *file, void *priv,
1404 struct v4l2_control *ctrl)
1405 {
1406 struct em28xx_fh *fh = priv;
1407 struct em28xx *dev = fh->dev;
1408 int rc;
1409
1410 rc = check_dev(dev);
1411 if (rc < 0)
1412 return rc;
1413 rc = 0;
1414
1415 mutex_lock(&dev->lock);
1416
1417 /* Set an AC97 control */
1418 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1419 rc = ac97_get_ctrl(dev, ctrl);
1420 else
1421 rc = 1;
1422
1423 /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1424 if (rc == 1) {
1425 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1426 rc = 0;
1427 }
1428
1429 mutex_unlock(&dev->lock);
1430 return rc;
1431 }
1432
1433 static int vidioc_s_ctrl(struct file *file, void *priv,
1434 struct v4l2_control *ctrl)
1435 {
1436 struct em28xx_fh *fh = priv;
1437 struct em28xx *dev = fh->dev;
1438 int rc;
1439
1440 rc = check_dev(dev);
1441 if (rc < 0)
1442 return rc;
1443
1444 mutex_lock(&dev->lock);
1445
1446 /* Set an AC97 control */
1447 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1448 rc = ac97_set_ctrl(dev, ctrl);
1449 else
1450 rc = 1;
1451
1452 /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1453 if (rc == 1) {
1454 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1455
1456 /*
1457 * In the case of non-AC97 volume controls, we still need
1458 * to do some setups at em28xx, in order to mute/unmute
1459 * and to adjust audio volume. However, the value ranges
1460 * should be checked by the corresponding V4L subdriver.
1461 */
1462 switch (ctrl->id) {
1463 case V4L2_CID_AUDIO_MUTE:
1464 dev->mute = ctrl->value;
1465 rc = em28xx_audio_analog_set(dev);
1466 break;
1467 case V4L2_CID_AUDIO_VOLUME:
1468 dev->volume = ctrl->value;
1469 rc = em28xx_audio_analog_set(dev);
1470 }
1471 }
1472
1473 mutex_unlock(&dev->lock);
1474 return rc;
1475 }
1476
1477 static int vidioc_g_tuner(struct file *file, void *priv,
1478 struct v4l2_tuner *t)
1479 {
1480 struct em28xx_fh *fh = priv;
1481 struct em28xx *dev = fh->dev;
1482 int rc;
1483
1484 rc = check_dev(dev);
1485 if (rc < 0)
1486 return rc;
1487
1488 if (0 != t->index)
1489 return -EINVAL;
1490
1491 strcpy(t->name, "Tuner");
1492
1493 mutex_lock(&dev->lock);
1494 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1495 mutex_unlock(&dev->lock);
1496
1497 return 0;
1498 }
1499
1500 static int vidioc_s_tuner(struct file *file, void *priv,
1501 struct v4l2_tuner *t)
1502 {
1503 struct em28xx_fh *fh = priv;
1504 struct em28xx *dev = fh->dev;
1505 int rc;
1506
1507 rc = check_dev(dev);
1508 if (rc < 0)
1509 return rc;
1510
1511 if (0 != t->index)
1512 return -EINVAL;
1513
1514 mutex_lock(&dev->lock);
1515 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1516 mutex_unlock(&dev->lock);
1517
1518 return 0;
1519 }
1520
1521 static int vidioc_g_frequency(struct file *file, void *priv,
1522 struct v4l2_frequency *f)
1523 {
1524 struct em28xx_fh *fh = priv;
1525 struct em28xx *dev = fh->dev;
1526
1527 mutex_lock(&dev->lock);
1528 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1529 f->frequency = dev->ctl_freq;
1530 mutex_unlock(&dev->lock);
1531
1532 return 0;
1533 }
1534
1535 static int vidioc_s_frequency(struct file *file, void *priv,
1536 struct v4l2_frequency *f)
1537 {
1538 struct em28xx_fh *fh = priv;
1539 struct em28xx *dev = fh->dev;
1540 int rc;
1541
1542 rc = check_dev(dev);
1543 if (rc < 0)
1544 return rc;
1545
1546 if (0 != f->tuner)
1547 return -EINVAL;
1548
1549 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1550 return -EINVAL;
1551 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1552 return -EINVAL;
1553
1554 mutex_lock(&dev->lock);
1555
1556 dev->ctl_freq = f->frequency;
1557 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1558
1559 mutex_unlock(&dev->lock);
1560
1561 return 0;
1562 }
1563
1564 #ifdef CONFIG_VIDEO_ADV_DEBUG
1565 static int em28xx_reg_len(int reg)
1566 {
1567 switch (reg) {
1568 case EM28XX_R40_AC97LSB:
1569 case EM28XX_R30_HSCALELOW:
1570 case EM28XX_R32_VSCALELOW:
1571 return 2;
1572 default:
1573 return 1;
1574 }
1575 }
1576
1577 static int vidioc_g_chip_ident(struct file *file, void *priv,
1578 struct v4l2_dbg_chip_ident *chip)
1579 {
1580 struct em28xx_fh *fh = priv;
1581 struct em28xx *dev = fh->dev;
1582
1583 chip->ident = V4L2_IDENT_NONE;
1584 chip->revision = 0;
1585
1586 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1587
1588 return 0;
1589 }
1590
1591
1592 static int vidioc_g_register(struct file *file, void *priv,
1593 struct v4l2_dbg_register *reg)
1594 {
1595 struct em28xx_fh *fh = priv;
1596 struct em28xx *dev = fh->dev;
1597 int ret;
1598
1599 switch (reg->match.type) {
1600 case V4L2_CHIP_MATCH_AC97:
1601 mutex_lock(&dev->lock);
1602 ret = em28xx_read_ac97(dev, reg->reg);
1603 mutex_unlock(&dev->lock);
1604 if (ret < 0)
1605 return ret;
1606
1607 reg->val = ret;
1608 reg->size = 1;
1609 return 0;
1610 case V4L2_CHIP_MATCH_I2C_DRIVER:
1611 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1612 return 0;
1613 case V4L2_CHIP_MATCH_I2C_ADDR:
1614 /* TODO: is this correct? */
1615 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1616 return 0;
1617 default:
1618 if (!v4l2_chip_match_host(&reg->match))
1619 return -EINVAL;
1620 }
1621
1622 /* Match host */
1623 reg->size = em28xx_reg_len(reg->reg);
1624 if (reg->size == 1) {
1625 mutex_lock(&dev->lock);
1626 ret = em28xx_read_reg(dev, reg->reg);
1627 mutex_unlock(&dev->lock);
1628
1629 if (ret < 0)
1630 return ret;
1631
1632 reg->val = ret;
1633 } else {
1634 __le16 val = 0;
1635 mutex_lock(&dev->lock);
1636 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1637 reg->reg, (char *)&val, 2);
1638 mutex_unlock(&dev->lock);
1639 if (ret < 0)
1640 return ret;
1641
1642 reg->val = le16_to_cpu(val);
1643 }
1644
1645 return 0;
1646 }
1647
1648 static int vidioc_s_register(struct file *file, void *priv,
1649 struct v4l2_dbg_register *reg)
1650 {
1651 struct em28xx_fh *fh = priv;
1652 struct em28xx *dev = fh->dev;
1653 __le16 buf;
1654 int rc;
1655
1656 switch (reg->match.type) {
1657 case V4L2_CHIP_MATCH_AC97:
1658 mutex_lock(&dev->lock);
1659 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1660 mutex_unlock(&dev->lock);
1661
1662 return rc;
1663 case V4L2_CHIP_MATCH_I2C_DRIVER:
1664 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1665 return 0;
1666 case V4L2_CHIP_MATCH_I2C_ADDR:
1667 /* TODO: is this correct? */
1668 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1669 return 0;
1670 default:
1671 if (!v4l2_chip_match_host(&reg->match))
1672 return -EINVAL;
1673 }
1674
1675 /* Match host */
1676 buf = cpu_to_le16(reg->val);
1677
1678 mutex_lock(&dev->lock);
1679 rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1680 em28xx_reg_len(reg->reg));
1681 mutex_unlock(&dev->lock);
1682
1683 return rc;
1684 }
1685 #endif
1686
1687
1688 static int vidioc_cropcap(struct file *file, void *priv,
1689 struct v4l2_cropcap *cc)
1690 {
1691 struct em28xx_fh *fh = priv;
1692 struct em28xx *dev = fh->dev;
1693
1694 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1695 return -EINVAL;
1696
1697 cc->bounds.left = 0;
1698 cc->bounds.top = 0;
1699 cc->bounds.width = dev->width;
1700 cc->bounds.height = dev->height;
1701 cc->defrect = cc->bounds;
1702 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1703 cc->pixelaspect.denominator = 59;
1704
1705 return 0;
1706 }
1707
1708 static int vidioc_streamon(struct file *file, void *priv,
1709 enum v4l2_buf_type type)
1710 {
1711 struct em28xx_fh *fh = priv;
1712 struct em28xx *dev = fh->dev;
1713 int rc = -EINVAL;
1714
1715 rc = check_dev(dev);
1716 if (rc < 0)
1717 return rc;
1718
1719 if (unlikely(type != fh->type))
1720 return -EINVAL;
1721
1722 em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1723 fh, type, fh->resources, dev->resources);
1724
1725 if (unlikely(!res_get(fh, get_ressource(fh))))
1726 return -EBUSY;
1727
1728 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1729 rc = videobuf_streamon(&fh->vb_vidq);
1730 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1731 rc = videobuf_streamon(&fh->vb_vbiq);
1732
1733 return rc;
1734 }
1735
1736 static int vidioc_streamoff(struct file *file, void *priv,
1737 enum v4l2_buf_type type)
1738 {
1739 struct em28xx_fh *fh = priv;
1740 struct em28xx *dev = fh->dev;
1741 int rc;
1742
1743 rc = check_dev(dev);
1744 if (rc < 0)
1745 return rc;
1746
1747 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1748 fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1749 return -EINVAL;
1750 if (type != fh->type)
1751 return -EINVAL;
1752
1753 em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1754 fh, type, fh->resources, dev->resources);
1755
1756 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1757 videobuf_streamoff(&fh->vb_vidq);
1758 res_free(fh, EM28XX_RESOURCE_VIDEO);
1759 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1760 videobuf_streamoff(&fh->vb_vbiq);
1761 res_free(fh, EM28XX_RESOURCE_VBI);
1762 }
1763
1764 return 0;
1765 }
1766
1767 static int vidioc_querycap(struct file *file, void *priv,
1768 struct v4l2_capability *cap)
1769 {
1770 struct em28xx_fh *fh = priv;
1771 struct em28xx *dev = fh->dev;
1772
1773 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1774 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1775 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1776
1777 cap->version = EM28XX_VERSION_CODE;
1778
1779 cap->capabilities =
1780 V4L2_CAP_SLICED_VBI_CAPTURE |
1781 V4L2_CAP_VIDEO_CAPTURE |
1782 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1783
1784 if (dev->vbi_dev)
1785 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1786
1787 if (dev->audio_mode.has_audio)
1788 cap->capabilities |= V4L2_CAP_AUDIO;
1789
1790 if (dev->tuner_type != TUNER_ABSENT)
1791 cap->capabilities |= V4L2_CAP_TUNER;
1792
1793 return 0;
1794 }
1795
1796 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1797 struct v4l2_fmtdesc *f)
1798 {
1799 if (unlikely(f->index >= ARRAY_SIZE(format)))
1800 return -EINVAL;
1801
1802 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1803 f->pixelformat = format[f->index].fourcc;
1804
1805 return 0;
1806 }
1807
1808 /* Sliced VBI ioctls */
1809 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1810 struct v4l2_format *f)
1811 {
1812 struct em28xx_fh *fh = priv;
1813 struct em28xx *dev = fh->dev;
1814 int rc;
1815
1816 rc = check_dev(dev);
1817 if (rc < 0)
1818 return rc;
1819
1820 mutex_lock(&dev->lock);
1821
1822 f->fmt.sliced.service_set = 0;
1823 v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1824
1825 if (f->fmt.sliced.service_set == 0)
1826 rc = -EINVAL;
1827
1828 mutex_unlock(&dev->lock);
1829
1830 return rc;
1831 }
1832
1833 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1834 struct v4l2_format *f)
1835 {
1836 struct em28xx_fh *fh = priv;
1837 struct em28xx *dev = fh->dev;
1838 int rc;
1839
1840 rc = check_dev(dev);
1841 if (rc < 0)
1842 return rc;
1843
1844 mutex_lock(&dev->lock);
1845 v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1846 mutex_unlock(&dev->lock);
1847
1848 if (f->fmt.sliced.service_set == 0)
1849 return -EINVAL;
1850
1851 return 0;
1852 }
1853
1854 /* RAW VBI ioctls */
1855
1856 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1857 struct v4l2_format *format)
1858 {
1859 format->fmt.vbi.samples_per_line = 720;
1860 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1861 format->fmt.vbi.offset = 0;
1862 format->fmt.vbi.flags = 0;
1863
1864 /* Varies by video standard (NTSC, PAL, etc.) */
1865 /* FIXME: hard-coded for NTSC support */
1866 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1867 format->fmt.vbi.count[0] = 12;
1868 format->fmt.vbi.count[1] = 12;
1869 format->fmt.vbi.start[0] = 10;
1870 format->fmt.vbi.start[1] = 273;
1871
1872 return 0;
1873 }
1874
1875 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1876 struct v4l2_format *format)
1877 {
1878 format->fmt.vbi.samples_per_line = 720;
1879 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1880 format->fmt.vbi.offset = 0;
1881 format->fmt.vbi.flags = 0;
1882
1883 /* Varies by video standard (NTSC, PAL, etc.) */
1884 /* FIXME: hard-coded for NTSC support */
1885 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; /* FIXME: ??? */
1886 format->fmt.vbi.count[0] = 12;
1887 format->fmt.vbi.count[1] = 12;
1888 format->fmt.vbi.start[0] = 10;
1889 format->fmt.vbi.start[1] = 273;
1890
1891 return 0;
1892 }
1893
1894 static int vidioc_reqbufs(struct file *file, void *priv,
1895 struct v4l2_requestbuffers *rb)
1896 {
1897 struct em28xx_fh *fh = priv;
1898 struct em28xx *dev = fh->dev;
1899 int rc;
1900
1901 rc = check_dev(dev);
1902 if (rc < 0)
1903 return rc;
1904
1905 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1906 return videobuf_reqbufs(&fh->vb_vidq, rb);
1907 else
1908 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1909 }
1910
1911 static int vidioc_querybuf(struct file *file, void *priv,
1912 struct v4l2_buffer *b)
1913 {
1914 struct em28xx_fh *fh = priv;
1915 struct em28xx *dev = fh->dev;
1916 int rc;
1917
1918 rc = check_dev(dev);
1919 if (rc < 0)
1920 return rc;
1921
1922 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1923 return videobuf_querybuf(&fh->vb_vidq, b);
1924 else {
1925 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1926 the videobuf framework, but we probably shouldn't be
1927 returning a buffer larger than that which was asked for.
1928 At a minimum, it causes a crash in zvbi since it does
1929 a memcpy based on the source buffer length */
1930 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1931 b->length = 17280;
1932 return result;
1933 }
1934 }
1935
1936 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1937 {
1938 struct em28xx_fh *fh = priv;
1939 struct em28xx *dev = fh->dev;
1940 int rc;
1941
1942 rc = check_dev(dev);
1943 if (rc < 0)
1944 return rc;
1945
1946 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1947 return videobuf_qbuf(&fh->vb_vidq, b);
1948 else
1949 return videobuf_qbuf(&fh->vb_vbiq, b);
1950 }
1951
1952 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1953 {
1954 struct em28xx_fh *fh = priv;
1955 struct em28xx *dev = fh->dev;
1956 int rc;
1957
1958 rc = check_dev(dev);
1959 if (rc < 0)
1960 return rc;
1961
1962 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1963 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1964 O_NONBLOCK);
1965 else
1966 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1967 O_NONBLOCK);
1968 }
1969
1970 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1971 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1972 {
1973 struct em28xx_fh *fh = priv;
1974
1975 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1976 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1977 else
1978 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
1979 }
1980 #endif
1981
1982
1983 /* ----------------------------------------------------------- */
1984 /* RADIO ESPECIFIC IOCTLS */
1985 /* ----------------------------------------------------------- */
1986
1987 static int radio_querycap(struct file *file, void *priv,
1988 struct v4l2_capability *cap)
1989 {
1990 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1991
1992 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1993 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1994 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1995
1996 cap->version = EM28XX_VERSION_CODE;
1997 cap->capabilities = V4L2_CAP_TUNER;
1998 return 0;
1999 }
2000
2001 static int radio_g_tuner(struct file *file, void *priv,
2002 struct v4l2_tuner *t)
2003 {
2004 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2005
2006 if (unlikely(t->index > 0))
2007 return -EINVAL;
2008
2009 strcpy(t->name, "Radio");
2010 t->type = V4L2_TUNER_RADIO;
2011
2012 mutex_lock(&dev->lock);
2013 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2014 mutex_unlock(&dev->lock);
2015
2016 return 0;
2017 }
2018
2019 static int radio_enum_input(struct file *file, void *priv,
2020 struct v4l2_input *i)
2021 {
2022 if (i->index != 0)
2023 return -EINVAL;
2024 strcpy(i->name, "Radio");
2025 i->type = V4L2_INPUT_TYPE_TUNER;
2026
2027 return 0;
2028 }
2029
2030 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2031 {
2032 if (unlikely(a->index))
2033 return -EINVAL;
2034
2035 strcpy(a->name, "Radio");
2036 return 0;
2037 }
2038
2039 static int radio_s_tuner(struct file *file, void *priv,
2040 struct v4l2_tuner *t)
2041 {
2042 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2043
2044 if (0 != t->index)
2045 return -EINVAL;
2046
2047 mutex_lock(&dev->lock);
2048 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2049 mutex_unlock(&dev->lock);
2050
2051 return 0;
2052 }
2053
2054 static int radio_s_audio(struct file *file, void *fh,
2055 struct v4l2_audio *a)
2056 {
2057 return 0;
2058 }
2059
2060 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2061 {
2062 return 0;
2063 }
2064
2065 static int radio_queryctrl(struct file *file, void *priv,
2066 struct v4l2_queryctrl *qc)
2067 {
2068 int i;
2069
2070 if (qc->id < V4L2_CID_BASE ||
2071 qc->id >= V4L2_CID_LASTP1)
2072 return -EINVAL;
2073
2074 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2075 if (qc->id && qc->id == ac97_qctrl[i].id) {
2076 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2077 return 0;
2078 }
2079 }
2080
2081 return -EINVAL;
2082 }
2083
2084 /*
2085 * em28xx_v4l2_open()
2086 * inits the device and starts isoc transfer
2087 */
2088 static int em28xx_v4l2_open(struct file *filp)
2089 {
2090 int minor = video_devdata(filp)->minor;
2091 int errCode = 0, radio;
2092 struct em28xx *dev;
2093 enum v4l2_buf_type fh_type;
2094 struct em28xx_fh *fh;
2095 enum v4l2_field field;
2096
2097 dev = em28xx_get_device(minor, &fh_type, &radio);
2098
2099 if (NULL == dev)
2100 return -ENODEV;
2101
2102 mutex_lock(&dev->lock);
2103
2104 em28xx_videodbg("open minor=%d type=%s users=%d\n",
2105 minor, v4l2_type_names[fh_type], dev->users);
2106
2107
2108 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2109 if (!fh) {
2110 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2111 mutex_unlock(&dev->lock);
2112 return -ENOMEM;
2113 }
2114 fh->dev = dev;
2115 fh->radio = radio;
2116 fh->type = fh_type;
2117 filp->private_data = fh;
2118
2119 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2120 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2121 em28xx_set_alternate(dev);
2122 em28xx_resolution_set(dev);
2123
2124 /* Needed, since GPIO might have disabled power of
2125 some i2c device
2126 */
2127 em28xx_wake_i2c(dev);
2128
2129 }
2130 if (fh->radio) {
2131 em28xx_videodbg("video_open: setting radio device\n");
2132 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2133 }
2134
2135 dev->users++;
2136
2137 if (dev->progressive)
2138 field = V4L2_FIELD_NONE;
2139 else
2140 field = V4L2_FIELD_INTERLACED;
2141
2142 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2143 NULL, &dev->slock,
2144 V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2145 sizeof(struct em28xx_buffer), fh);
2146
2147 videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2148 NULL, &dev->slock,
2149 V4L2_BUF_TYPE_VBI_CAPTURE,
2150 V4L2_FIELD_SEQ_TB,
2151 sizeof(struct em28xx_buffer), fh);
2152
2153 mutex_unlock(&dev->lock);
2154
2155 return errCode;
2156 }
2157
2158 /*
2159 * em28xx_realease_resources()
2160 * unregisters the v4l2,i2c and usb devices
2161 * called when the device gets disconected or at module unload
2162 */
2163 void em28xx_release_analog_resources(struct em28xx *dev)
2164 {
2165
2166 /*FIXME: I2C IR should be disconnected */
2167
2168 if (dev->radio_dev) {
2169 if (-1 != dev->radio_dev->minor)
2170 video_unregister_device(dev->radio_dev);
2171 else
2172 video_device_release(dev->radio_dev);
2173 dev->radio_dev = NULL;
2174 }
2175 if (dev->vbi_dev) {
2176 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
2177 dev->vbi_dev->num);
2178 if (-1 != dev->vbi_dev->minor)
2179 video_unregister_device(dev->vbi_dev);
2180 else
2181 video_device_release(dev->vbi_dev);
2182 dev->vbi_dev = NULL;
2183 }
2184 if (dev->vdev) {
2185 em28xx_info("V4L2 device /dev/video%d deregistered\n",
2186 dev->vdev->num);
2187 if (-1 != dev->vdev->minor)
2188 video_unregister_device(dev->vdev);
2189 else
2190 video_device_release(dev->vdev);
2191 dev->vdev = NULL;
2192 }
2193 }
2194
2195 /*
2196 * em28xx_v4l2_close()
2197 * stops streaming and deallocates all resources allocated by the v4l2
2198 * calls and ioctls
2199 */
2200 static int em28xx_v4l2_close(struct file *filp)
2201 {
2202 struct em28xx_fh *fh = filp->private_data;
2203 struct em28xx *dev = fh->dev;
2204 int errCode;
2205
2206 em28xx_videodbg("users=%d\n", dev->users);
2207
2208 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2209 videobuf_stop(&fh->vb_vidq);
2210 res_free(fh, EM28XX_RESOURCE_VIDEO);
2211 }
2212
2213 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2214 videobuf_stop(&fh->vb_vbiq);
2215 res_free(fh, EM28XX_RESOURCE_VBI);
2216 }
2217
2218 if (dev->users == 1) {
2219 /* the device is already disconnect,
2220 free the remaining resources */
2221 if (dev->state & DEV_DISCONNECTED) {
2222 em28xx_release_resources(dev);
2223 kfree(dev);
2224 return 0;
2225 }
2226
2227 /* Save some power by putting tuner to sleep */
2228 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
2229
2230 /* do this before setting alternate! */
2231 em28xx_uninit_isoc(dev);
2232 em28xx_set_mode(dev, EM28XX_SUSPEND);
2233
2234 /* set alternate 0 */
2235 dev->alt = 0;
2236 em28xx_videodbg("setting alternate 0\n");
2237 errCode = usb_set_interface(dev->udev, 0, 0);
2238 if (errCode < 0) {
2239 em28xx_errdev("cannot change alternate number to "
2240 "0 (error=%i)\n", errCode);
2241 }
2242 }
2243
2244 videobuf_mmap_free(&fh->vb_vidq);
2245 videobuf_mmap_free(&fh->vb_vbiq);
2246 kfree(fh);
2247 dev->users--;
2248 wake_up_interruptible_nr(&dev->open, 1);
2249 return 0;
2250 }
2251
2252 /*
2253 * em28xx_v4l2_read()
2254 * will allocate buffers when called for the first time
2255 */
2256 static ssize_t
2257 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2258 loff_t *pos)
2259 {
2260 struct em28xx_fh *fh = filp->private_data;
2261 struct em28xx *dev = fh->dev;
2262 int rc;
2263
2264 rc = check_dev(dev);
2265 if (rc < 0)
2266 return rc;
2267
2268 /* FIXME: read() is not prepared to allow changing the video
2269 resolution while streaming. Seems a bug at em28xx_set_fmt
2270 */
2271
2272 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2273 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2274 return -EBUSY;
2275
2276 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2277 filp->f_flags & O_NONBLOCK);
2278 }
2279
2280
2281 if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2282 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2283 return -EBUSY;
2284
2285 return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2286 filp->f_flags & O_NONBLOCK);
2287 }
2288
2289 return 0;
2290 }
2291
2292 /*
2293 * em28xx_v4l2_poll()
2294 * will allocate buffers when called for the first time
2295 */
2296 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2297 {
2298 struct em28xx_fh *fh = filp->private_data;
2299 struct em28xx *dev = fh->dev;
2300 int rc;
2301
2302 rc = check_dev(dev);
2303 if (rc < 0)
2304 return rc;
2305
2306 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2307 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2308 return POLLERR;
2309 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2310 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2311 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2312 return POLLERR;
2313 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2314 } else {
2315 return POLLERR;
2316 }
2317 }
2318
2319 /*
2320 * em28xx_v4l2_mmap()
2321 */
2322 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2323 {
2324 struct em28xx_fh *fh = filp->private_data;
2325 struct em28xx *dev = fh->dev;
2326 int rc;
2327
2328 rc = check_dev(dev);
2329 if (rc < 0)
2330 return rc;
2331
2332 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2333 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2334 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2335 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2336
2337 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2338 (unsigned long)vma->vm_start,
2339 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2340 rc);
2341
2342 return rc;
2343 }
2344
2345 static const struct v4l2_file_operations em28xx_v4l_fops = {
2346 .owner = THIS_MODULE,
2347 .open = em28xx_v4l2_open,
2348 .release = em28xx_v4l2_close,
2349 .read = em28xx_v4l2_read,
2350 .poll = em28xx_v4l2_poll,
2351 .mmap = em28xx_v4l2_mmap,
2352 .ioctl = video_ioctl2,
2353 };
2354
2355 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2356 .vidioc_querycap = vidioc_querycap,
2357 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2358 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2359 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2360 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2361 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2362 .vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap,
2363 .vidioc_g_audio = vidioc_g_audio,
2364 .vidioc_s_audio = vidioc_s_audio,
2365 .vidioc_cropcap = vidioc_cropcap,
2366
2367 .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap,
2368 .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2369 .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2370
2371 .vidioc_reqbufs = vidioc_reqbufs,
2372 .vidioc_querybuf = vidioc_querybuf,
2373 .vidioc_qbuf = vidioc_qbuf,
2374 .vidioc_dqbuf = vidioc_dqbuf,
2375 .vidioc_g_std = vidioc_g_std,
2376 .vidioc_s_std = vidioc_s_std,
2377 .vidioc_g_parm = vidioc_g_parm,
2378 .vidioc_s_parm = vidioc_s_parm,
2379 .vidioc_enum_input = vidioc_enum_input,
2380 .vidioc_g_input = vidioc_g_input,
2381 .vidioc_s_input = vidioc_s_input,
2382 .vidioc_queryctrl = vidioc_queryctrl,
2383 .vidioc_g_ctrl = vidioc_g_ctrl,
2384 .vidioc_s_ctrl = vidioc_s_ctrl,
2385 .vidioc_streamon = vidioc_streamon,
2386 .vidioc_streamoff = vidioc_streamoff,
2387 .vidioc_g_tuner = vidioc_g_tuner,
2388 .vidioc_s_tuner = vidioc_s_tuner,
2389 .vidioc_g_frequency = vidioc_g_frequency,
2390 .vidioc_s_frequency = vidioc_s_frequency,
2391 #ifdef CONFIG_VIDEO_ADV_DEBUG
2392 .vidioc_g_register = vidioc_g_register,
2393 .vidioc_s_register = vidioc_s_register,
2394 .vidioc_g_chip_ident = vidioc_g_chip_ident,
2395 #endif
2396 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2397 .vidiocgmbuf = vidiocgmbuf,
2398 #endif
2399 };
2400
2401 static const struct video_device em28xx_video_template = {
2402 .fops = &em28xx_v4l_fops,
2403 .release = video_device_release,
2404 .ioctl_ops = &video_ioctl_ops,
2405
2406 .minor = -1,
2407
2408 .tvnorms = V4L2_STD_ALL,
2409 .current_norm = V4L2_STD_PAL,
2410 };
2411
2412 static const struct v4l2_file_operations radio_fops = {
2413 .owner = THIS_MODULE,
2414 .open = em28xx_v4l2_open,
2415 .release = em28xx_v4l2_close,
2416 .ioctl = video_ioctl2,
2417 };
2418
2419 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2420 .vidioc_querycap = radio_querycap,
2421 .vidioc_g_tuner = radio_g_tuner,
2422 .vidioc_enum_input = radio_enum_input,
2423 .vidioc_g_audio = radio_g_audio,
2424 .vidioc_s_tuner = radio_s_tuner,
2425 .vidioc_s_audio = radio_s_audio,
2426 .vidioc_s_input = radio_s_input,
2427 .vidioc_queryctrl = radio_queryctrl,
2428 .vidioc_g_ctrl = vidioc_g_ctrl,
2429 .vidioc_s_ctrl = vidioc_s_ctrl,
2430 .vidioc_g_frequency = vidioc_g_frequency,
2431 .vidioc_s_frequency = vidioc_s_frequency,
2432 #ifdef CONFIG_VIDEO_ADV_DEBUG
2433 .vidioc_g_register = vidioc_g_register,
2434 .vidioc_s_register = vidioc_s_register,
2435 #endif
2436 };
2437
2438 static struct video_device em28xx_radio_template = {
2439 .name = "em28xx-radio",
2440 .fops = &radio_fops,
2441 .ioctl_ops = &radio_ioctl_ops,
2442 .minor = -1,
2443 };
2444
2445 /******************************** usb interface ******************************/
2446
2447
2448
2449 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2450 const struct video_device *template,
2451 const char *type_name)
2452 {
2453 struct video_device *vfd;
2454
2455 vfd = video_device_alloc();
2456 if (NULL == vfd)
2457 return NULL;
2458
2459 *vfd = *template;
2460 vfd->minor = -1;
2461 vfd->v4l2_dev = &dev->v4l2_dev;
2462 vfd->release = video_device_release;
2463 vfd->debug = video_debug;
2464
2465 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2466 dev->name, type_name);
2467
2468 return vfd;
2469 }
2470
2471 int em28xx_register_analog_devices(struct em28xx *dev)
2472 {
2473 u8 val;
2474 int ret;
2475
2476 printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
2477 dev->name,
2478 (EM28XX_VERSION_CODE >> 16) & 0xff,
2479 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2480
2481 /* set default norm */
2482 dev->norm = em28xx_video_template.current_norm;
2483 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2484 dev->ctl_input = 0;
2485
2486 /* Analog specific initialization */
2487 dev->format = &format[0];
2488 em28xx_set_video_format(dev, format[0].fourcc,
2489 norm_maxw(dev), norm_maxh(dev));
2490
2491 video_mux(dev, dev->ctl_input);
2492
2493 /* Audio defaults */
2494 dev->mute = 1;
2495 dev->volume = 0x1f;
2496
2497 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2498 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2499 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2500 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2501
2502 em28xx_set_outfmt(dev);
2503 em28xx_colorlevels_set_default(dev);
2504 em28xx_compression_disable(dev);
2505
2506 /* allocate and fill video video_device struct */
2507 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2508 if (!dev->vdev) {
2509 em28xx_errdev("cannot allocate video_device.\n");
2510 return -ENODEV;
2511 }
2512
2513 /* register v4l2 video video_device */
2514 ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2515 video_nr[dev->devno]);
2516 if (ret) {
2517 em28xx_errdev("unable to register video device (error=%i).\n",
2518 ret);
2519 return ret;
2520 }
2521
2522 /* Allocate and fill vbi video_device struct */
2523 if (em28xx_vbi_supported(dev) == 1) {
2524 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2525 "vbi");
2526
2527 /* register v4l2 vbi video_device */
2528 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2529 vbi_nr[dev->devno]);
2530 if (ret < 0) {
2531 em28xx_errdev("unable to register vbi device\n");
2532 return ret;
2533 }
2534 }
2535
2536 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2537 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2538 "radio");
2539 if (!dev->radio_dev) {
2540 em28xx_errdev("cannot allocate video_device.\n");
2541 return -ENODEV;
2542 }
2543 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2544 radio_nr[dev->devno]);
2545 if (ret < 0) {
2546 em28xx_errdev("can't register radio device\n");
2547 return ret;
2548 }
2549 em28xx_info("Registered radio device as /dev/radio%d\n",
2550 dev->radio_dev->num);
2551 }
2552
2553 em28xx_info("V4L2 video device registered as /dev/video%d\n",
2554 dev->vdev->num);
2555
2556 if (dev->vbi_dev)
2557 em28xx_info("V4L2 VBI device registered as /dev/vbi%d\n",
2558 dev->vbi_dev->num);
2559
2560 return 0;
2561 }
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