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[media] v4l2: make vidioc_s_audio const
[deliverable/linux.git] / drivers / media / usb / em28xx / em28xx-video.c
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/mm.h>
36 #include <linux/mutex.h>
37 #include <linux/slab.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
53 #define EM28XX_VERSION "0.1.3"
54
55 #define em28xx_videodbg(fmt, arg...) do {\
56 if (video_debug) \
57 printk(KERN_INFO "%s %s :"fmt, \
58 dev->name, __func__ , ##arg); } while (0)
59
60 static unsigned int isoc_debug;
61 module_param(isoc_debug, int, 0644);
62 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
63
64 #define em28xx_isocdbg(fmt, arg...) \
65 do {\
66 if (isoc_debug) { \
67 printk(KERN_INFO "%s %s :"fmt, \
68 dev->name, __func__ , ##arg); \
69 } \
70 } while (0)
71
72 MODULE_AUTHOR(DRIVER_AUTHOR);
73 MODULE_DESCRIPTION(DRIVER_DESC);
74 MODULE_LICENSE("GPL");
75 MODULE_VERSION(EM28XX_VERSION);
76
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(video_nr, int, NULL, 0444);
82 module_param_array(vbi_nr, int, NULL, 0444);
83 module_param_array(radio_nr, int, NULL, 0444);
84 MODULE_PARM_DESC(video_nr, "video device numbers");
85 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
87
88 static unsigned int video_debug;
89 module_param(video_debug, int, 0644);
90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
91
92 /* supported video standards */
93 static struct em28xx_fmt format[] = {
94 {
95 .name = "16 bpp YUY2, 4:2:2, packed",
96 .fourcc = V4L2_PIX_FMT_YUYV,
97 .depth = 16,
98 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
99 }, {
100 .name = "16 bpp RGB 565, LE",
101 .fourcc = V4L2_PIX_FMT_RGB565,
102 .depth = 16,
103 .reg = EM28XX_OUTFMT_RGB_16_656,
104 }, {
105 .name = "8 bpp Bayer BGBG..GRGR",
106 .fourcc = V4L2_PIX_FMT_SBGGR8,
107 .depth = 8,
108 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
109 }, {
110 .name = "8 bpp Bayer GRGR..BGBG",
111 .fourcc = V4L2_PIX_FMT_SGRBG8,
112 .depth = 8,
113 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
114 }, {
115 .name = "8 bpp Bayer GBGB..RGRG",
116 .fourcc = V4L2_PIX_FMT_SGBRG8,
117 .depth = 8,
118 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
119 }, {
120 .name = "12 bpp YUV411",
121 .fourcc = V4L2_PIX_FMT_YUV411P,
122 .depth = 12,
123 .reg = EM28XX_OUTFMT_YUV411,
124 },
125 };
126
127 /* supported controls */
128 /* Common to all boards */
129 static struct v4l2_queryctrl ac97_qctrl[] = {
130 {
131 .id = V4L2_CID_AUDIO_VOLUME,
132 .type = V4L2_CTRL_TYPE_INTEGER,
133 .name = "Volume",
134 .minimum = 0x0,
135 .maximum = 0x1f,
136 .step = 0x1,
137 .default_value = 0x1f,
138 .flags = V4L2_CTRL_FLAG_SLIDER,
139 }, {
140 .id = V4L2_CID_AUDIO_MUTE,
141 .type = V4L2_CTRL_TYPE_BOOLEAN,
142 .name = "Mute",
143 .minimum = 0,
144 .maximum = 1,
145 .step = 1,
146 .default_value = 1,
147 .flags = 0,
148 }
149 };
150
151 /* ------------------------------------------------------------------
152 DMA and thread functions
153 ------------------------------------------------------------------*/
154
155 /*
156 * Announces that a buffer were filled and request the next
157 */
158 static inline void buffer_filled(struct em28xx *dev,
159 struct em28xx_dmaqueue *dma_q,
160 struct em28xx_buffer *buf)
161 {
162 /* Advice that buffer was filled */
163 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
164 buf->vb.state = VIDEOBUF_DONE;
165 buf->vb.field_count++;
166 do_gettimeofday(&buf->vb.ts);
167
168 dev->isoc_ctl.vid_buf = NULL;
169
170 list_del(&buf->vb.queue);
171 wake_up(&buf->vb.done);
172 }
173
174 static inline void vbi_buffer_filled(struct em28xx *dev,
175 struct em28xx_dmaqueue *dma_q,
176 struct em28xx_buffer *buf)
177 {
178 /* Advice that buffer was filled */
179 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
180
181 buf->vb.state = VIDEOBUF_DONE;
182 buf->vb.field_count++;
183 do_gettimeofday(&buf->vb.ts);
184
185 dev->isoc_ctl.vbi_buf = NULL;
186
187 list_del(&buf->vb.queue);
188 wake_up(&buf->vb.done);
189 }
190
191 /*
192 * Identify the buffer header type and properly handles
193 */
194 static void em28xx_copy_video(struct em28xx *dev,
195 struct em28xx_dmaqueue *dma_q,
196 struct em28xx_buffer *buf,
197 unsigned char *p,
198 unsigned char *outp, unsigned long len)
199 {
200 void *fieldstart, *startwrite, *startread;
201 int linesdone, currlinedone, offset, lencopy, remain;
202 int bytesperline = dev->width << 1;
203
204 if (dma_q->pos + len > buf->vb.size)
205 len = buf->vb.size - dma_q->pos;
206
207 startread = p;
208 remain = len;
209
210 if (dev->progressive)
211 fieldstart = outp;
212 else {
213 /* Interlaces two half frames */
214 if (buf->top_field)
215 fieldstart = outp;
216 else
217 fieldstart = outp + bytesperline;
218 }
219
220 linesdone = dma_q->pos / bytesperline;
221 currlinedone = dma_q->pos % bytesperline;
222
223 if (dev->progressive)
224 offset = linesdone * bytesperline + currlinedone;
225 else
226 offset = linesdone * bytesperline * 2 + currlinedone;
227
228 startwrite = fieldstart + offset;
229 lencopy = bytesperline - currlinedone;
230 lencopy = lencopy > remain ? remain : lencopy;
231
232 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
233 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
234 ((char *)startwrite + lencopy) -
235 ((char *)outp + buf->vb.size));
236 remain = (char *)outp + buf->vb.size - (char *)startwrite;
237 lencopy = remain;
238 }
239 if (lencopy <= 0)
240 return;
241 memcpy(startwrite, startread, lencopy);
242
243 remain -= lencopy;
244
245 while (remain > 0) {
246 startwrite += lencopy + bytesperline;
247 startread += lencopy;
248 if (bytesperline > remain)
249 lencopy = remain;
250 else
251 lencopy = bytesperline;
252
253 if ((char *)startwrite + lencopy > (char *)outp +
254 buf->vb.size) {
255 em28xx_isocdbg("Overflow of %zi bytes past buffer end"
256 "(2)\n",
257 ((char *)startwrite + lencopy) -
258 ((char *)outp + buf->vb.size));
259 lencopy = remain = (char *)outp + buf->vb.size -
260 (char *)startwrite;
261 }
262 if (lencopy <= 0)
263 break;
264
265 memcpy(startwrite, startread, lencopy);
266
267 remain -= lencopy;
268 }
269
270 dma_q->pos += len;
271 }
272
273 static void em28xx_copy_vbi(struct em28xx *dev,
274 struct em28xx_dmaqueue *dma_q,
275 struct em28xx_buffer *buf,
276 unsigned char *p,
277 unsigned char *outp, unsigned long len)
278 {
279 void *startwrite, *startread;
280 int offset;
281 int bytesperline;
282
283 if (dev == NULL) {
284 em28xx_isocdbg("dev is null\n");
285 return;
286 }
287 bytesperline = dev->vbi_width;
288
289 if (dma_q == NULL) {
290 em28xx_isocdbg("dma_q is null\n");
291 return;
292 }
293 if (buf == NULL) {
294 return;
295 }
296 if (p == NULL) {
297 em28xx_isocdbg("p is null\n");
298 return;
299 }
300 if (outp == NULL) {
301 em28xx_isocdbg("outp is null\n");
302 return;
303 }
304
305 if (dma_q->pos + len > buf->vb.size)
306 len = buf->vb.size - dma_q->pos;
307
308 startread = p;
309
310 startwrite = outp + dma_q->pos;
311 offset = dma_q->pos;
312
313 /* Make sure the bottom field populates the second half of the frame */
314 if (buf->top_field == 0) {
315 startwrite += bytesperline * dev->vbi_height;
316 offset += bytesperline * dev->vbi_height;
317 }
318
319 memcpy(startwrite, startread, len);
320 dma_q->pos += len;
321 }
322
323 static inline void print_err_status(struct em28xx *dev,
324 int packet, int status)
325 {
326 char *errmsg = "Unknown";
327
328 switch (status) {
329 case -ENOENT:
330 errmsg = "unlinked synchronuously";
331 break;
332 case -ECONNRESET:
333 errmsg = "unlinked asynchronuously";
334 break;
335 case -ENOSR:
336 errmsg = "Buffer error (overrun)";
337 break;
338 case -EPIPE:
339 errmsg = "Stalled (device not responding)";
340 break;
341 case -EOVERFLOW:
342 errmsg = "Babble (bad cable?)";
343 break;
344 case -EPROTO:
345 errmsg = "Bit-stuff error (bad cable?)";
346 break;
347 case -EILSEQ:
348 errmsg = "CRC/Timeout (could be anything)";
349 break;
350 case -ETIME:
351 errmsg = "Device does not respond";
352 break;
353 }
354 if (packet < 0) {
355 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
356 } else {
357 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
358 packet, status, errmsg);
359 }
360 }
361
362 /*
363 * video-buf generic routine to get the next available buffer
364 */
365 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
366 struct em28xx_buffer **buf)
367 {
368 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
369 char *outp;
370
371 if (list_empty(&dma_q->active)) {
372 em28xx_isocdbg("No active queue to serve\n");
373 dev->isoc_ctl.vid_buf = NULL;
374 *buf = NULL;
375 return;
376 }
377
378 /* Get the next buffer */
379 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
380
381 /* Cleans up buffer - Useful for testing for frame/URB loss */
382 outp = videobuf_to_vmalloc(&(*buf)->vb);
383 memset(outp, 0, (*buf)->vb.size);
384
385 dev->isoc_ctl.vid_buf = *buf;
386
387 return;
388 }
389
390 /*
391 * video-buf generic routine to get the next available VBI buffer
392 */
393 static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
394 struct em28xx_buffer **buf)
395 {
396 struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
397 char *outp;
398
399 if (list_empty(&dma_q->active)) {
400 em28xx_isocdbg("No active queue to serve\n");
401 dev->isoc_ctl.vbi_buf = NULL;
402 *buf = NULL;
403 return;
404 }
405
406 /* Get the next buffer */
407 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
408 /* Cleans up buffer - Useful for testing for frame/URB loss */
409 outp = videobuf_to_vmalloc(&(*buf)->vb);
410 memset(outp, 0x00, (*buf)->vb.size);
411
412 dev->isoc_ctl.vbi_buf = *buf;
413
414 return;
415 }
416
417 /*
418 * Controls the isoc copy of each urb packet
419 */
420 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
421 {
422 struct em28xx_buffer *buf;
423 struct em28xx_dmaqueue *dma_q = &dev->vidq;
424 unsigned char *outp = NULL;
425 int i, len = 0, rc = 1;
426 unsigned char *p;
427
428 if (!dev)
429 return 0;
430
431 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
432 return 0;
433
434 if (urb->status < 0) {
435 print_err_status(dev, -1, urb->status);
436 if (urb->status == -ENOENT)
437 return 0;
438 }
439
440 buf = dev->isoc_ctl.vid_buf;
441 if (buf != NULL)
442 outp = videobuf_to_vmalloc(&buf->vb);
443
444 for (i = 0; i < urb->number_of_packets; i++) {
445 int status = urb->iso_frame_desc[i].status;
446
447 if (status < 0) {
448 print_err_status(dev, i, status);
449 if (urb->iso_frame_desc[i].status != -EPROTO)
450 continue;
451 }
452
453 len = urb->iso_frame_desc[i].actual_length - 4;
454
455 if (urb->iso_frame_desc[i].actual_length <= 0) {
456 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
457 continue;
458 }
459 if (urb->iso_frame_desc[i].actual_length >
460 dev->max_pkt_size) {
461 em28xx_isocdbg("packet bigger than packet size");
462 continue;
463 }
464
465 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
466
467 /* FIXME: incomplete buffer checks where removed to make
468 logic simpler. Impacts of those changes should be evaluated
469 */
470 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
471 em28xx_isocdbg("VBI HEADER!!!\n");
472 /* FIXME: Should add vbi copy */
473 continue;
474 }
475 if (p[0] == 0x22 && p[1] == 0x5a) {
476 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
477 len, (p[2] & 1) ? "odd" : "even");
478
479 if (dev->progressive || !(p[2] & 1)) {
480 if (buf != NULL)
481 buffer_filled(dev, dma_q, buf);
482 get_next_buf(dma_q, &buf);
483 if (buf == NULL)
484 outp = NULL;
485 else
486 outp = videobuf_to_vmalloc(&buf->vb);
487 }
488
489 if (buf != NULL) {
490 if (p[2] & 1)
491 buf->top_field = 0;
492 else
493 buf->top_field = 1;
494 }
495
496 dma_q->pos = 0;
497 }
498 if (buf != NULL) {
499 if (p[0] != 0x88 && p[0] != 0x22) {
500 em28xx_isocdbg("frame is not complete\n");
501 len += 4;
502 } else {
503 p += 4;
504 }
505 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
506 }
507 }
508 return rc;
509 }
510
511 /* Version of isoc handler that takes into account a mixture of video and
512 VBI data */
513 static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
514 {
515 struct em28xx_buffer *buf, *vbi_buf;
516 struct em28xx_dmaqueue *dma_q = &dev->vidq;
517 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
518 unsigned char *outp = NULL;
519 unsigned char *vbioutp = NULL;
520 int i, len = 0, rc = 1;
521 unsigned char *p;
522 int vbi_size;
523
524 if (!dev)
525 return 0;
526
527 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
528 return 0;
529
530 if (urb->status < 0) {
531 print_err_status(dev, -1, urb->status);
532 if (urb->status == -ENOENT)
533 return 0;
534 }
535
536 buf = dev->isoc_ctl.vid_buf;
537 if (buf != NULL)
538 outp = videobuf_to_vmalloc(&buf->vb);
539
540 vbi_buf = dev->isoc_ctl.vbi_buf;
541 if (vbi_buf != NULL)
542 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
543
544 for (i = 0; i < urb->number_of_packets; i++) {
545 int status = urb->iso_frame_desc[i].status;
546
547 if (status < 0) {
548 print_err_status(dev, i, status);
549 if (urb->iso_frame_desc[i].status != -EPROTO)
550 continue;
551 }
552
553 len = urb->iso_frame_desc[i].actual_length;
554 if (urb->iso_frame_desc[i].actual_length <= 0) {
555 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
556 continue;
557 }
558 if (urb->iso_frame_desc[i].actual_length >
559 dev->max_pkt_size) {
560 em28xx_isocdbg("packet bigger than packet size");
561 continue;
562 }
563
564 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
565
566 /* capture type 0 = vbi start
567 capture type 1 = video start
568 capture type 2 = video in progress */
569 if (p[0] == 0x33 && p[1] == 0x95) {
570 dev->capture_type = 0;
571 dev->vbi_read = 0;
572 em28xx_isocdbg("VBI START HEADER!!!\n");
573 dev->cur_field = p[2];
574 p += 4;
575 len -= 4;
576 } else if (p[0] == 0x88 && p[1] == 0x88 &&
577 p[2] == 0x88 && p[3] == 0x88) {
578 /* continuation */
579 p += 4;
580 len -= 4;
581 } else if (p[0] == 0x22 && p[1] == 0x5a) {
582 /* start video */
583 p += 4;
584 len -= 4;
585 }
586
587 vbi_size = dev->vbi_width * dev->vbi_height;
588
589 if (dev->capture_type == 0) {
590 if (dev->vbi_read >= vbi_size) {
591 /* We've already read all the VBI data, so
592 treat the rest as video */
593 em28xx_isocdbg("dev->vbi_read > vbi_size\n");
594 } else if ((dev->vbi_read + len) < vbi_size) {
595 /* This entire frame is VBI data */
596 if (dev->vbi_read == 0 &&
597 (!(dev->cur_field & 1))) {
598 /* Brand new frame */
599 if (vbi_buf != NULL)
600 vbi_buffer_filled(dev,
601 vbi_dma_q,
602 vbi_buf);
603 vbi_get_next_buf(vbi_dma_q, &vbi_buf);
604 if (vbi_buf == NULL)
605 vbioutp = NULL;
606 else
607 vbioutp = videobuf_to_vmalloc(
608 &vbi_buf->vb);
609 }
610
611 if (dev->vbi_read == 0) {
612 vbi_dma_q->pos = 0;
613 if (vbi_buf != NULL) {
614 if (dev->cur_field & 1)
615 vbi_buf->top_field = 0;
616 else
617 vbi_buf->top_field = 1;
618 }
619 }
620
621 dev->vbi_read += len;
622 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
623 vbioutp, len);
624 } else {
625 /* Some of this frame is VBI data and some is
626 video data */
627 int vbi_data_len = vbi_size - dev->vbi_read;
628 dev->vbi_read += vbi_data_len;
629 em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
630 vbioutp, vbi_data_len);
631 dev->capture_type = 1;
632 p += vbi_data_len;
633 len -= vbi_data_len;
634 }
635 }
636
637 if (dev->capture_type == 1) {
638 dev->capture_type = 2;
639 if (dev->progressive || !(dev->cur_field & 1)) {
640 if (buf != NULL)
641 buffer_filled(dev, dma_q, buf);
642 get_next_buf(dma_q, &buf);
643 if (buf == NULL)
644 outp = NULL;
645 else
646 outp = videobuf_to_vmalloc(&buf->vb);
647 }
648 if (buf != NULL) {
649 if (dev->cur_field & 1)
650 buf->top_field = 0;
651 else
652 buf->top_field = 1;
653 }
654
655 dma_q->pos = 0;
656 }
657
658 if (buf != NULL && dev->capture_type == 2) {
659 if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
660 p[2] == 0x88 && p[3] == 0x88) {
661 p += 4;
662 len -= 4;
663 }
664 if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
665 em28xx_isocdbg("Video frame %d, len=%i, %s\n",
666 p[2], len, (p[2] & 1) ?
667 "odd" : "even");
668 p += 4;
669 len -= 4;
670 }
671
672 if (len > 0)
673 em28xx_copy_video(dev, dma_q, buf, p, outp,
674 len);
675 }
676 }
677 return rc;
678 }
679
680
681 /* ------------------------------------------------------------------
682 Videobuf operations
683 ------------------------------------------------------------------*/
684
685 static int
686 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
687 {
688 struct em28xx_fh *fh = vq->priv_data;
689 struct em28xx *dev = fh->dev;
690 struct v4l2_frequency f;
691
692 *size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
693 >> 3;
694
695 if (0 == *count)
696 *count = EM28XX_DEF_BUF;
697
698 if (*count < EM28XX_MIN_BUF)
699 *count = EM28XX_MIN_BUF;
700
701 /* Ask tuner to go to analog or radio mode */
702 memset(&f, 0, sizeof(f));
703 f.frequency = dev->ctl_freq;
704 f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
705
706 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
707
708 return 0;
709 }
710
711 /* This is called *without* dev->slock held; please keep it that way */
712 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
713 {
714 struct em28xx_fh *fh = vq->priv_data;
715 struct em28xx *dev = fh->dev;
716 unsigned long flags = 0;
717 if (in_interrupt())
718 BUG();
719
720 /* We used to wait for the buffer to finish here, but this didn't work
721 because, as we were keeping the state as VIDEOBUF_QUEUED,
722 videobuf_queue_cancel marked it as finished for us.
723 (Also, it could wedge forever if the hardware was misconfigured.)
724
725 This should be safe; by the time we get here, the buffer isn't
726 queued anymore. If we ever start marking the buffers as
727 VIDEOBUF_ACTIVE, it won't be, though.
728 */
729 spin_lock_irqsave(&dev->slock, flags);
730 if (dev->isoc_ctl.vid_buf == buf)
731 dev->isoc_ctl.vid_buf = NULL;
732 spin_unlock_irqrestore(&dev->slock, flags);
733
734 videobuf_vmalloc_free(&buf->vb);
735 buf->vb.state = VIDEOBUF_NEEDS_INIT;
736 }
737
738 static int
739 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
740 enum v4l2_field field)
741 {
742 struct em28xx_fh *fh = vq->priv_data;
743 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
744 struct em28xx *dev = fh->dev;
745 int rc = 0, urb_init = 0;
746
747 buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
748 + 7) >> 3;
749
750 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
751 return -EINVAL;
752
753 buf->vb.width = dev->width;
754 buf->vb.height = dev->height;
755 buf->vb.field = field;
756
757 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
758 rc = videobuf_iolock(vq, &buf->vb, NULL);
759 if (rc < 0)
760 goto fail;
761 }
762
763 if (!dev->isoc_ctl.analog_bufs.num_bufs)
764 urb_init = 1;
765
766 if (urb_init) {
767 if (em28xx_vbi_supported(dev) == 1)
768 rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
769 EM28XX_NUM_PACKETS,
770 EM28XX_NUM_BUFS,
771 dev->max_pkt_size,
772 em28xx_isoc_copy_vbi);
773 else
774 rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
775 EM28XX_NUM_PACKETS,
776 EM28XX_NUM_BUFS,
777 dev->max_pkt_size,
778 em28xx_isoc_copy);
779 if (rc < 0)
780 goto fail;
781 }
782
783 buf->vb.state = VIDEOBUF_PREPARED;
784 return 0;
785
786 fail:
787 free_buffer(vq, buf);
788 return rc;
789 }
790
791 static void
792 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
793 {
794 struct em28xx_buffer *buf = container_of(vb,
795 struct em28xx_buffer,
796 vb);
797 struct em28xx_fh *fh = vq->priv_data;
798 struct em28xx *dev = fh->dev;
799 struct em28xx_dmaqueue *vidq = &dev->vidq;
800
801 buf->vb.state = VIDEOBUF_QUEUED;
802 list_add_tail(&buf->vb.queue, &vidq->active);
803
804 }
805
806 static void buffer_release(struct videobuf_queue *vq,
807 struct videobuf_buffer *vb)
808 {
809 struct em28xx_buffer *buf = container_of(vb,
810 struct em28xx_buffer,
811 vb);
812 struct em28xx_fh *fh = vq->priv_data;
813 struct em28xx *dev = (struct em28xx *)fh->dev;
814
815 em28xx_isocdbg("em28xx: called buffer_release\n");
816
817 free_buffer(vq, buf);
818 }
819
820 static struct videobuf_queue_ops em28xx_video_qops = {
821 .buf_setup = buffer_setup,
822 .buf_prepare = buffer_prepare,
823 .buf_queue = buffer_queue,
824 .buf_release = buffer_release,
825 };
826
827 /********************* v4l2 interface **************************************/
828
829 static void video_mux(struct em28xx *dev, int index)
830 {
831 dev->ctl_input = index;
832 dev->ctl_ainput = INPUT(index)->amux;
833 dev->ctl_aoutput = INPUT(index)->aout;
834
835 if (!dev->ctl_aoutput)
836 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
837
838 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
839 INPUT(index)->vmux, 0, 0);
840
841 if (dev->board.has_msp34xx) {
842 if (dev->i2s_speed) {
843 v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
844 s_i2s_clock_freq, dev->i2s_speed);
845 }
846 /* Note: this is msp3400 specific */
847 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
848 dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
849 }
850
851 if (dev->board.adecoder != EM28XX_NOADECODER) {
852 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
853 dev->ctl_ainput, dev->ctl_aoutput, 0);
854 }
855
856 em28xx_audio_analog_set(dev);
857 }
858
859 /* Usage lock check functions */
860 static int res_get(struct em28xx_fh *fh, unsigned int bit)
861 {
862 struct em28xx *dev = fh->dev;
863
864 if (fh->resources & bit)
865 /* have it already allocated */
866 return 1;
867
868 /* is it free? */
869 if (dev->resources & bit) {
870 /* no, someone else uses it */
871 return 0;
872 }
873 /* it's free, grab it */
874 fh->resources |= bit;
875 dev->resources |= bit;
876 em28xx_videodbg("res: get %d\n", bit);
877 return 1;
878 }
879
880 static int res_check(struct em28xx_fh *fh, unsigned int bit)
881 {
882 return fh->resources & bit;
883 }
884
885 static int res_locked(struct em28xx *dev, unsigned int bit)
886 {
887 return dev->resources & bit;
888 }
889
890 static void res_free(struct em28xx_fh *fh, unsigned int bits)
891 {
892 struct em28xx *dev = fh->dev;
893
894 BUG_ON((fh->resources & bits) != bits);
895
896 fh->resources &= ~bits;
897 dev->resources &= ~bits;
898 em28xx_videodbg("res: put %d\n", bits);
899 }
900
901 static int get_ressource(struct em28xx_fh *fh)
902 {
903 switch (fh->type) {
904 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
905 return EM28XX_RESOURCE_VIDEO;
906 case V4L2_BUF_TYPE_VBI_CAPTURE:
907 return EM28XX_RESOURCE_VBI;
908 default:
909 BUG();
910 return 0;
911 }
912 }
913
914 /*
915 * ac97_queryctrl()
916 * return the ac97 supported controls
917 */
918 static int ac97_queryctrl(struct v4l2_queryctrl *qc)
919 {
920 int i;
921
922 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
923 if (qc->id && qc->id == ac97_qctrl[i].id) {
924 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
925 return 0;
926 }
927 }
928
929 /* Control is not ac97 related */
930 return 1;
931 }
932
933 /*
934 * ac97_get_ctrl()
935 * return the current values for ac97 mute and volume
936 */
937 static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
938 {
939 switch (ctrl->id) {
940 case V4L2_CID_AUDIO_MUTE:
941 ctrl->value = dev->mute;
942 return 0;
943 case V4L2_CID_AUDIO_VOLUME:
944 ctrl->value = dev->volume;
945 return 0;
946 default:
947 /* Control is not ac97 related */
948 return 1;
949 }
950 }
951
952 /*
953 * ac97_set_ctrl()
954 * set values for ac97 mute and volume
955 */
956 static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
957 {
958 int i;
959
960 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
961 if (ctrl->id == ac97_qctrl[i].id)
962 goto handle;
963
964 /* Announce that hasn't handle it */
965 return 1;
966
967 handle:
968 if (ctrl->value < ac97_qctrl[i].minimum ||
969 ctrl->value > ac97_qctrl[i].maximum)
970 return -ERANGE;
971
972 switch (ctrl->id) {
973 case V4L2_CID_AUDIO_MUTE:
974 dev->mute = ctrl->value;
975 break;
976 case V4L2_CID_AUDIO_VOLUME:
977 dev->volume = ctrl->value;
978 break;
979 }
980
981 return em28xx_audio_analog_set(dev);
982 }
983
984 static int check_dev(struct em28xx *dev)
985 {
986 if (dev->state & DEV_DISCONNECTED) {
987 em28xx_errdev("v4l2 ioctl: device not present\n");
988 return -ENODEV;
989 }
990
991 if (dev->state & DEV_MISCONFIGURED) {
992 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
993 "close and open it again\n");
994 return -EIO;
995 }
996 return 0;
997 }
998
999 static void get_scale(struct em28xx *dev,
1000 unsigned int width, unsigned int height,
1001 unsigned int *hscale, unsigned int *vscale)
1002 {
1003 unsigned int maxw = norm_maxw(dev);
1004 unsigned int maxh = norm_maxh(dev);
1005
1006 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1007 if (*hscale >= 0x4000)
1008 *hscale = 0x3fff;
1009
1010 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1011 if (*vscale >= 0x4000)
1012 *vscale = 0x3fff;
1013 }
1014
1015 /* ------------------------------------------------------------------
1016 IOCTL vidioc handling
1017 ------------------------------------------------------------------*/
1018
1019 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1020 struct v4l2_format *f)
1021 {
1022 struct em28xx_fh *fh = priv;
1023 struct em28xx *dev = fh->dev;
1024
1025 f->fmt.pix.width = dev->width;
1026 f->fmt.pix.height = dev->height;
1027 f->fmt.pix.pixelformat = dev->format->fourcc;
1028 f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
1029 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
1030 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1031
1032 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1033 if (dev->progressive)
1034 f->fmt.pix.field = V4L2_FIELD_NONE;
1035 else
1036 f->fmt.pix.field = dev->interlaced ?
1037 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1038 return 0;
1039 }
1040
1041 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1042 {
1043 unsigned int i;
1044
1045 for (i = 0; i < ARRAY_SIZE(format); i++)
1046 if (format[i].fourcc == fourcc)
1047 return &format[i];
1048
1049 return NULL;
1050 }
1051
1052 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1053 struct v4l2_format *f)
1054 {
1055 struct em28xx_fh *fh = priv;
1056 struct em28xx *dev = fh->dev;
1057 unsigned int width = f->fmt.pix.width;
1058 unsigned int height = f->fmt.pix.height;
1059 unsigned int maxw = norm_maxw(dev);
1060 unsigned int maxh = norm_maxh(dev);
1061 unsigned int hscale, vscale;
1062 struct em28xx_fmt *fmt;
1063
1064 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1065 if (!fmt) {
1066 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1067 f->fmt.pix.pixelformat);
1068 return -EINVAL;
1069 }
1070
1071 if (dev->board.is_em2800) {
1072 /* the em2800 can only scale down to 50% */
1073 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1074 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1075 /* MaxPacketSize for em2800 is too small to capture at full resolution
1076 * use half of maxw as the scaler can only scale to 50% */
1077 if (width == maxw && height == maxh)
1078 width /= 2;
1079 } else {
1080 /* width must even because of the YUYV format
1081 height must be even because of interlacing */
1082 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1083 1, 0);
1084 }
1085
1086 get_scale(dev, width, height, &hscale, &vscale);
1087
1088 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1089 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1090
1091 f->fmt.pix.width = width;
1092 f->fmt.pix.height = height;
1093 f->fmt.pix.pixelformat = fmt->fourcc;
1094 f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1095 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1096 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1097 if (dev->progressive)
1098 f->fmt.pix.field = V4L2_FIELD_NONE;
1099 else
1100 f->fmt.pix.field = dev->interlaced ?
1101 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1102
1103 return 0;
1104 }
1105
1106 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1107 unsigned width, unsigned height)
1108 {
1109 struct em28xx_fmt *fmt;
1110
1111 fmt = format_by_fourcc(fourcc);
1112 if (!fmt)
1113 return -EINVAL;
1114
1115 dev->format = fmt;
1116 dev->width = width;
1117 dev->height = height;
1118
1119 /* set new image size */
1120 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1121
1122 em28xx_set_alternate(dev);
1123 em28xx_resolution_set(dev);
1124
1125 return 0;
1126 }
1127
1128 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1129 struct v4l2_format *f)
1130 {
1131 struct em28xx_fh *fh = priv;
1132 struct em28xx *dev = fh->dev;
1133 int rc;
1134
1135 rc = check_dev(dev);
1136 if (rc < 0)
1137 return rc;
1138
1139 vidioc_try_fmt_vid_cap(file, priv, f);
1140
1141 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1142 em28xx_errdev("%s queue busy\n", __func__);
1143 return -EBUSY;
1144 }
1145
1146 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1147 f->fmt.pix.width, f->fmt.pix.height);
1148 }
1149
1150 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1151 {
1152 struct em28xx_fh *fh = priv;
1153 struct em28xx *dev = fh->dev;
1154 int rc;
1155
1156 rc = check_dev(dev);
1157 if (rc < 0)
1158 return rc;
1159
1160 *norm = dev->norm;
1161
1162 return 0;
1163 }
1164
1165 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1166 {
1167 struct em28xx_fh *fh = priv;
1168 struct em28xx *dev = fh->dev;
1169 int rc;
1170
1171 rc = check_dev(dev);
1172 if (rc < 0)
1173 return rc;
1174
1175 v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
1176
1177 return 0;
1178 }
1179
1180 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1181 {
1182 struct em28xx_fh *fh = priv;
1183 struct em28xx *dev = fh->dev;
1184 struct v4l2_format f;
1185 int rc;
1186
1187 rc = check_dev(dev);
1188 if (rc < 0)
1189 return rc;
1190
1191 dev->norm = *norm;
1192
1193 /* Adjusts width/height, if needed */
1194 f.fmt.pix.width = dev->width;
1195 f.fmt.pix.height = dev->height;
1196 vidioc_try_fmt_vid_cap(file, priv, &f);
1197
1198 /* set new image size */
1199 dev->width = f.fmt.pix.width;
1200 dev->height = f.fmt.pix.height;
1201 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1202
1203 em28xx_resolution_set(dev);
1204 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1205
1206 return 0;
1207 }
1208
1209 static int vidioc_g_parm(struct file *file, void *priv,
1210 struct v4l2_streamparm *p)
1211 {
1212 struct em28xx_fh *fh = priv;
1213 struct em28xx *dev = fh->dev;
1214 int rc = 0;
1215
1216 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1217 return -EINVAL;
1218
1219 if (dev->board.is_webcam)
1220 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1221 video, g_parm, p);
1222 else
1223 v4l2_video_std_frame_period(dev->norm,
1224 &p->parm.capture.timeperframe);
1225
1226 return rc;
1227 }
1228
1229 static int vidioc_s_parm(struct file *file, void *priv,
1230 struct v4l2_streamparm *p)
1231 {
1232 struct em28xx_fh *fh = priv;
1233 struct em28xx *dev = fh->dev;
1234
1235 if (!dev->board.is_webcam)
1236 return -EINVAL;
1237
1238 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1239 return -EINVAL;
1240
1241 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1242 }
1243
1244 static const char *iname[] = {
1245 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1246 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1247 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1248 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1249 [EM28XX_VMUX_SVIDEO] = "S-Video",
1250 [EM28XX_VMUX_TELEVISION] = "Television",
1251 [EM28XX_VMUX_CABLE] = "Cable TV",
1252 [EM28XX_VMUX_DVB] = "DVB",
1253 [EM28XX_VMUX_DEBUG] = "for debug only",
1254 };
1255
1256 static int vidioc_enum_input(struct file *file, void *priv,
1257 struct v4l2_input *i)
1258 {
1259 struct em28xx_fh *fh = priv;
1260 struct em28xx *dev = fh->dev;
1261 unsigned int n;
1262
1263 n = i->index;
1264 if (n >= MAX_EM28XX_INPUT)
1265 return -EINVAL;
1266 if (0 == INPUT(n)->type)
1267 return -EINVAL;
1268
1269 i->index = n;
1270 i->type = V4L2_INPUT_TYPE_CAMERA;
1271
1272 strcpy(i->name, iname[INPUT(n)->type]);
1273
1274 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1275 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1276 i->type = V4L2_INPUT_TYPE_TUNER;
1277
1278 i->std = dev->vdev->tvnorms;
1279
1280 return 0;
1281 }
1282
1283 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1284 {
1285 struct em28xx_fh *fh = priv;
1286 struct em28xx *dev = fh->dev;
1287
1288 *i = dev->ctl_input;
1289
1290 return 0;
1291 }
1292
1293 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1294 {
1295 struct em28xx_fh *fh = priv;
1296 struct em28xx *dev = fh->dev;
1297 int rc;
1298
1299 rc = check_dev(dev);
1300 if (rc < 0)
1301 return rc;
1302
1303 if (i >= MAX_EM28XX_INPUT)
1304 return -EINVAL;
1305 if (0 == INPUT(i)->type)
1306 return -EINVAL;
1307
1308 video_mux(dev, i);
1309 return 0;
1310 }
1311
1312 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1313 {
1314 struct em28xx_fh *fh = priv;
1315 struct em28xx *dev = fh->dev;
1316
1317 if (!dev->audio_mode.has_audio)
1318 return -EINVAL;
1319
1320 switch (a->index) {
1321 case EM28XX_AMUX_VIDEO:
1322 strcpy(a->name, "Television");
1323 break;
1324 case EM28XX_AMUX_LINE_IN:
1325 strcpy(a->name, "Line In");
1326 break;
1327 case EM28XX_AMUX_VIDEO2:
1328 strcpy(a->name, "Television alt");
1329 break;
1330 case EM28XX_AMUX_PHONE:
1331 strcpy(a->name, "Phone");
1332 break;
1333 case EM28XX_AMUX_MIC:
1334 strcpy(a->name, "Mic");
1335 break;
1336 case EM28XX_AMUX_CD:
1337 strcpy(a->name, "CD");
1338 break;
1339 case EM28XX_AMUX_AUX:
1340 strcpy(a->name, "Aux");
1341 break;
1342 case EM28XX_AMUX_PCM_OUT:
1343 strcpy(a->name, "PCM");
1344 break;
1345 default:
1346 return -EINVAL;
1347 }
1348
1349 a->index = dev->ctl_ainput;
1350 a->capability = V4L2_AUDCAP_STEREO;
1351
1352 return 0;
1353 }
1354
1355 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1356 {
1357 struct em28xx_fh *fh = priv;
1358 struct em28xx *dev = fh->dev;
1359
1360
1361 if (!dev->audio_mode.has_audio)
1362 return -EINVAL;
1363
1364 if (a->index >= MAX_EM28XX_INPUT)
1365 return -EINVAL;
1366 if (0 == INPUT(a->index)->type)
1367 return -EINVAL;
1368
1369 dev->ctl_ainput = INPUT(a->index)->amux;
1370 dev->ctl_aoutput = INPUT(a->index)->aout;
1371
1372 if (!dev->ctl_aoutput)
1373 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1374
1375 return 0;
1376 }
1377
1378 static int vidioc_queryctrl(struct file *file, void *priv,
1379 struct v4l2_queryctrl *qc)
1380 {
1381 struct em28xx_fh *fh = priv;
1382 struct em28xx *dev = fh->dev;
1383 int id = qc->id;
1384 int rc;
1385
1386 rc = check_dev(dev);
1387 if (rc < 0)
1388 return rc;
1389
1390 memset(qc, 0, sizeof(*qc));
1391
1392 qc->id = id;
1393
1394 /* enumerate AC97 controls */
1395 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1396 rc = ac97_queryctrl(qc);
1397 if (!rc)
1398 return 0;
1399 }
1400
1401 /* enumerate V4L2 device controls */
1402 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1403
1404 if (qc->type)
1405 return 0;
1406 else
1407 return -EINVAL;
1408 }
1409
1410 /*
1411 * FIXME: This is an indirect way to check if a control exists at a
1412 * subdev. Instead of that hack, maybe the better would be to change all
1413 * subdevs to return -ENOIOCTLCMD, if an ioctl is not supported.
1414 */
1415 static int check_subdev_ctrl(struct em28xx *dev, int id)
1416 {
1417 struct v4l2_queryctrl qc;
1418
1419 memset(&qc, 0, sizeof(qc));
1420 qc.id = id;
1421
1422 /* enumerate V4L2 device controls */
1423 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc);
1424
1425 if (qc.type)
1426 return 0;
1427 else
1428 return -EINVAL;
1429 }
1430
1431 static int vidioc_g_ctrl(struct file *file, void *priv,
1432 struct v4l2_control *ctrl)
1433 {
1434 struct em28xx_fh *fh = priv;
1435 struct em28xx *dev = fh->dev;
1436 int rc;
1437
1438 rc = check_dev(dev);
1439 if (rc < 0)
1440 return rc;
1441 rc = 0;
1442
1443 /* Set an AC97 control */
1444 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1445 rc = ac97_get_ctrl(dev, ctrl);
1446 else
1447 rc = 1;
1448
1449 /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1450 if (rc == 1) {
1451 if (check_subdev_ctrl(dev, ctrl->id))
1452 return -EINVAL;
1453
1454 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1455 rc = 0;
1456 }
1457
1458 return rc;
1459 }
1460
1461 static int vidioc_s_ctrl(struct file *file, void *priv,
1462 struct v4l2_control *ctrl)
1463 {
1464 struct em28xx_fh *fh = priv;
1465 struct em28xx *dev = fh->dev;
1466 int rc;
1467
1468 rc = check_dev(dev);
1469 if (rc < 0)
1470 return rc;
1471
1472 /* Set an AC97 control */
1473 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1474 rc = ac97_set_ctrl(dev, ctrl);
1475 else
1476 rc = 1;
1477
1478 /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1479 if (rc == 1) {
1480 rc = check_subdev_ctrl(dev, ctrl->id);
1481 if (!rc)
1482 v4l2_device_call_all(&dev->v4l2_dev, 0,
1483 core, s_ctrl, ctrl);
1484 /*
1485 * In the case of non-AC97 volume controls, we still need
1486 * to do some setups at em28xx, in order to mute/unmute
1487 * and to adjust audio volume. However, the value ranges
1488 * should be checked by the corresponding V4L subdriver.
1489 */
1490 switch (ctrl->id) {
1491 case V4L2_CID_AUDIO_MUTE:
1492 dev->mute = ctrl->value;
1493 rc = em28xx_audio_analog_set(dev);
1494 break;
1495 case V4L2_CID_AUDIO_VOLUME:
1496 dev->volume = ctrl->value;
1497 rc = em28xx_audio_analog_set(dev);
1498 }
1499 }
1500 return (rc < 0) ? rc : 0;
1501 }
1502
1503 static int vidioc_g_tuner(struct file *file, void *priv,
1504 struct v4l2_tuner *t)
1505 {
1506 struct em28xx_fh *fh = priv;
1507 struct em28xx *dev = fh->dev;
1508 int rc;
1509
1510 rc = check_dev(dev);
1511 if (rc < 0)
1512 return rc;
1513
1514 if (0 != t->index)
1515 return -EINVAL;
1516
1517 strcpy(t->name, "Tuner");
1518 t->type = V4L2_TUNER_ANALOG_TV;
1519
1520 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1521 return 0;
1522 }
1523
1524 static int vidioc_s_tuner(struct file *file, void *priv,
1525 struct v4l2_tuner *t)
1526 {
1527 struct em28xx_fh *fh = priv;
1528 struct em28xx *dev = fh->dev;
1529 int rc;
1530
1531 rc = check_dev(dev);
1532 if (rc < 0)
1533 return rc;
1534
1535 if (0 != t->index)
1536 return -EINVAL;
1537
1538 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1539 return 0;
1540 }
1541
1542 static int vidioc_g_frequency(struct file *file, void *priv,
1543 struct v4l2_frequency *f)
1544 {
1545 struct em28xx_fh *fh = priv;
1546 struct em28xx *dev = fh->dev;
1547
1548 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1549 f->frequency = dev->ctl_freq;
1550 return 0;
1551 }
1552
1553 static int vidioc_s_frequency(struct file *file, void *priv,
1554 struct v4l2_frequency *f)
1555 {
1556 struct em28xx_fh *fh = priv;
1557 struct em28xx *dev = fh->dev;
1558 int rc;
1559
1560 rc = check_dev(dev);
1561 if (rc < 0)
1562 return rc;
1563
1564 if (0 != f->tuner)
1565 return -EINVAL;
1566
1567 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1568 return -EINVAL;
1569 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1570 return -EINVAL;
1571
1572 dev->ctl_freq = f->frequency;
1573 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1574
1575 return 0;
1576 }
1577
1578 #ifdef CONFIG_VIDEO_ADV_DEBUG
1579 static int em28xx_reg_len(int reg)
1580 {
1581 switch (reg) {
1582 case EM28XX_R40_AC97LSB:
1583 case EM28XX_R30_HSCALELOW:
1584 case EM28XX_R32_VSCALELOW:
1585 return 2;
1586 default:
1587 return 1;
1588 }
1589 }
1590
1591 static int vidioc_g_chip_ident(struct file *file, void *priv,
1592 struct v4l2_dbg_chip_ident *chip)
1593 {
1594 struct em28xx_fh *fh = priv;
1595 struct em28xx *dev = fh->dev;
1596
1597 chip->ident = V4L2_IDENT_NONE;
1598 chip->revision = 0;
1599
1600 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1601
1602 return 0;
1603 }
1604
1605
1606 static int vidioc_g_register(struct file *file, void *priv,
1607 struct v4l2_dbg_register *reg)
1608 {
1609 struct em28xx_fh *fh = priv;
1610 struct em28xx *dev = fh->dev;
1611 int ret;
1612
1613 switch (reg->match.type) {
1614 case V4L2_CHIP_MATCH_AC97:
1615 ret = em28xx_read_ac97(dev, reg->reg);
1616 if (ret < 0)
1617 return ret;
1618
1619 reg->val = ret;
1620 reg->size = 1;
1621 return 0;
1622 case V4L2_CHIP_MATCH_I2C_DRIVER:
1623 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1624 return 0;
1625 case V4L2_CHIP_MATCH_I2C_ADDR:
1626 /* TODO: is this correct? */
1627 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1628 return 0;
1629 default:
1630 if (!v4l2_chip_match_host(&reg->match))
1631 return -EINVAL;
1632 }
1633
1634 /* Match host */
1635 reg->size = em28xx_reg_len(reg->reg);
1636 if (reg->size == 1) {
1637 ret = em28xx_read_reg(dev, reg->reg);
1638
1639 if (ret < 0)
1640 return ret;
1641
1642 reg->val = ret;
1643 } else {
1644 __le16 val = 0;
1645 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1646 reg->reg, (char *)&val, 2);
1647 if (ret < 0)
1648 return ret;
1649
1650 reg->val = le16_to_cpu(val);
1651 }
1652
1653 return 0;
1654 }
1655
1656 static int vidioc_s_register(struct file *file, void *priv,
1657 struct v4l2_dbg_register *reg)
1658 {
1659 struct em28xx_fh *fh = priv;
1660 struct em28xx *dev = fh->dev;
1661 __le16 buf;
1662
1663 switch (reg->match.type) {
1664 case V4L2_CHIP_MATCH_AC97:
1665 return em28xx_write_ac97(dev, reg->reg, reg->val);
1666 case V4L2_CHIP_MATCH_I2C_DRIVER:
1667 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1668 return 0;
1669 case V4L2_CHIP_MATCH_I2C_ADDR:
1670 /* TODO: is this correct? */
1671 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1672 return 0;
1673 default:
1674 if (!v4l2_chip_match_host(&reg->match))
1675 return -EINVAL;
1676 }
1677
1678 /* Match host */
1679 buf = cpu_to_le16(reg->val);
1680
1681 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1682 em28xx_reg_len(reg->reg));
1683 }
1684 #endif
1685
1686
1687 static int vidioc_cropcap(struct file *file, void *priv,
1688 struct v4l2_cropcap *cc)
1689 {
1690 struct em28xx_fh *fh = priv;
1691 struct em28xx *dev = fh->dev;
1692
1693 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1694 return -EINVAL;
1695
1696 cc->bounds.left = 0;
1697 cc->bounds.top = 0;
1698 cc->bounds.width = dev->width;
1699 cc->bounds.height = dev->height;
1700 cc->defrect = cc->bounds;
1701 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1702 cc->pixelaspect.denominator = 59;
1703
1704 return 0;
1705 }
1706
1707 static int vidioc_streamon(struct file *file, void *priv,
1708 enum v4l2_buf_type type)
1709 {
1710 struct em28xx_fh *fh = priv;
1711 struct em28xx *dev = fh->dev;
1712 int rc = -EINVAL;
1713
1714 rc = check_dev(dev);
1715 if (rc < 0)
1716 return rc;
1717
1718 if (unlikely(type != fh->type))
1719 return -EINVAL;
1720
1721 em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1722 fh, type, fh->resources, dev->resources);
1723
1724 if (unlikely(!res_get(fh, get_ressource(fh))))
1725 return -EBUSY;
1726
1727 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1728 rc = videobuf_streamon(&fh->vb_vidq);
1729 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1730 rc = videobuf_streamon(&fh->vb_vbiq);
1731
1732 return rc;
1733 }
1734
1735 static int vidioc_streamoff(struct file *file, void *priv,
1736 enum v4l2_buf_type type)
1737 {
1738 struct em28xx_fh *fh = priv;
1739 struct em28xx *dev = fh->dev;
1740 int rc;
1741
1742 rc = check_dev(dev);
1743 if (rc < 0)
1744 return rc;
1745
1746 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1747 fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1748 return -EINVAL;
1749 if (type != fh->type)
1750 return -EINVAL;
1751
1752 em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1753 fh, type, fh->resources, dev->resources);
1754
1755 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1756 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
1757 videobuf_streamoff(&fh->vb_vidq);
1758 res_free(fh, EM28XX_RESOURCE_VIDEO);
1759 }
1760 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1761 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
1762 videobuf_streamoff(&fh->vb_vbiq);
1763 res_free(fh, EM28XX_RESOURCE_VBI);
1764 }
1765 }
1766
1767 return 0;
1768 }
1769
1770 static int vidioc_querycap(struct file *file, void *priv,
1771 struct v4l2_capability *cap)
1772 {
1773 struct em28xx_fh *fh = priv;
1774 struct em28xx *dev = fh->dev;
1775
1776 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1777 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1778 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1779
1780 cap->capabilities =
1781 V4L2_CAP_SLICED_VBI_CAPTURE |
1782 V4L2_CAP_VIDEO_CAPTURE |
1783 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1784
1785 if (dev->vbi_dev)
1786 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1787
1788 if (dev->audio_mode.has_audio)
1789 cap->capabilities |= V4L2_CAP_AUDIO;
1790
1791 if (dev->tuner_type != TUNER_ABSENT)
1792 cap->capabilities |= V4L2_CAP_TUNER;
1793
1794 return 0;
1795 }
1796
1797 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1798 struct v4l2_fmtdesc *f)
1799 {
1800 if (unlikely(f->index >= ARRAY_SIZE(format)))
1801 return -EINVAL;
1802
1803 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1804 f->pixelformat = format[f->index].fourcc;
1805
1806 return 0;
1807 }
1808
1809 static int vidioc_enum_framesizes(struct file *file, void *priv,
1810 struct v4l2_frmsizeenum *fsize)
1811 {
1812 struct em28xx_fh *fh = priv;
1813 struct em28xx *dev = fh->dev;
1814 struct em28xx_fmt *fmt;
1815 unsigned int maxw = norm_maxw(dev);
1816 unsigned int maxh = norm_maxh(dev);
1817
1818 fmt = format_by_fourcc(fsize->pixel_format);
1819 if (!fmt) {
1820 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1821 fsize->pixel_format);
1822 return -EINVAL;
1823 }
1824
1825 if (dev->board.is_em2800) {
1826 if (fsize->index > 1)
1827 return -EINVAL;
1828 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1829 fsize->discrete.width = maxw / (1 + fsize->index);
1830 fsize->discrete.height = maxh / (1 + fsize->index);
1831 return 0;
1832 }
1833
1834 if (fsize->index != 0)
1835 return -EINVAL;
1836
1837 /* Report a continuous range */
1838 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1839 fsize->stepwise.min_width = 48;
1840 fsize->stepwise.min_height = 32;
1841 fsize->stepwise.max_width = maxw;
1842 fsize->stepwise.max_height = maxh;
1843 fsize->stepwise.step_width = 1;
1844 fsize->stepwise.step_height = 1;
1845 return 0;
1846 }
1847
1848 /* Sliced VBI ioctls */
1849 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1850 struct v4l2_format *f)
1851 {
1852 struct em28xx_fh *fh = priv;
1853 struct em28xx *dev = fh->dev;
1854 int rc;
1855
1856 rc = check_dev(dev);
1857 if (rc < 0)
1858 return rc;
1859
1860 f->fmt.sliced.service_set = 0;
1861 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1862
1863 if (f->fmt.sliced.service_set == 0)
1864 rc = -EINVAL;
1865
1866 return rc;
1867 }
1868
1869 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1870 struct v4l2_format *f)
1871 {
1872 struct em28xx_fh *fh = priv;
1873 struct em28xx *dev = fh->dev;
1874 int rc;
1875
1876 rc = check_dev(dev);
1877 if (rc < 0)
1878 return rc;
1879
1880 v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
1881
1882 if (f->fmt.sliced.service_set == 0)
1883 return -EINVAL;
1884
1885 return 0;
1886 }
1887
1888 /* RAW VBI ioctls */
1889
1890 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1891 struct v4l2_format *format)
1892 {
1893 struct em28xx_fh *fh = priv;
1894 struct em28xx *dev = fh->dev;
1895
1896 format->fmt.vbi.samples_per_line = dev->vbi_width;
1897 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1898 format->fmt.vbi.offset = 0;
1899 format->fmt.vbi.flags = 0;
1900 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1901 format->fmt.vbi.count[0] = dev->vbi_height;
1902 format->fmt.vbi.count[1] = dev->vbi_height;
1903
1904 /* Varies by video standard (NTSC, PAL, etc.) */
1905 if (dev->norm & V4L2_STD_525_60) {
1906 /* NTSC */
1907 format->fmt.vbi.start[0] = 10;
1908 format->fmt.vbi.start[1] = 273;
1909 } else if (dev->norm & V4L2_STD_625_50) {
1910 /* PAL */
1911 format->fmt.vbi.start[0] = 6;
1912 format->fmt.vbi.start[1] = 318;
1913 }
1914
1915 return 0;
1916 }
1917
1918 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1919 struct v4l2_format *format)
1920 {
1921 struct em28xx_fh *fh = priv;
1922 struct em28xx *dev = fh->dev;
1923
1924 format->fmt.vbi.samples_per_line = dev->vbi_width;
1925 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1926 format->fmt.vbi.offset = 0;
1927 format->fmt.vbi.flags = 0;
1928 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1929 format->fmt.vbi.count[0] = dev->vbi_height;
1930 format->fmt.vbi.count[1] = dev->vbi_height;
1931
1932 /* Varies by video standard (NTSC, PAL, etc.) */
1933 if (dev->norm & V4L2_STD_525_60) {
1934 /* NTSC */
1935 format->fmt.vbi.start[0] = 10;
1936 format->fmt.vbi.start[1] = 273;
1937 } else if (dev->norm & V4L2_STD_625_50) {
1938 /* PAL */
1939 format->fmt.vbi.start[0] = 6;
1940 format->fmt.vbi.start[1] = 318;
1941 }
1942
1943 return 0;
1944 }
1945
1946 static int vidioc_reqbufs(struct file *file, void *priv,
1947 struct v4l2_requestbuffers *rb)
1948 {
1949 struct em28xx_fh *fh = priv;
1950 struct em28xx *dev = fh->dev;
1951 int rc;
1952
1953 rc = check_dev(dev);
1954 if (rc < 0)
1955 return rc;
1956
1957 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1958 return videobuf_reqbufs(&fh->vb_vidq, rb);
1959 else
1960 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1961 }
1962
1963 static int vidioc_querybuf(struct file *file, void *priv,
1964 struct v4l2_buffer *b)
1965 {
1966 struct em28xx_fh *fh = priv;
1967 struct em28xx *dev = fh->dev;
1968 int rc;
1969
1970 rc = check_dev(dev);
1971 if (rc < 0)
1972 return rc;
1973
1974 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1975 return videobuf_querybuf(&fh->vb_vidq, b);
1976 else {
1977 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1978 the videobuf framework, but we probably shouldn't be
1979 returning a buffer larger than that which was asked for.
1980 At a minimum, it causes a crash in zvbi since it does
1981 a memcpy based on the source buffer length */
1982 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1983 b->length = dev->vbi_width * dev->vbi_height * 2;
1984
1985 return result;
1986 }
1987 }
1988
1989 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1990 {
1991 struct em28xx_fh *fh = priv;
1992 struct em28xx *dev = fh->dev;
1993 int rc;
1994
1995 rc = check_dev(dev);
1996 if (rc < 0)
1997 return rc;
1998
1999 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2000 return videobuf_qbuf(&fh->vb_vidq, b);
2001 else
2002 return videobuf_qbuf(&fh->vb_vbiq, b);
2003 }
2004
2005 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
2006 {
2007 struct em28xx_fh *fh = priv;
2008 struct em28xx *dev = fh->dev;
2009 int rc;
2010
2011 rc = check_dev(dev);
2012 if (rc < 0)
2013 return rc;
2014
2015 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2016 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
2017 O_NONBLOCK);
2018 else
2019 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
2020 O_NONBLOCK);
2021 }
2022
2023 /* ----------------------------------------------------------- */
2024 /* RADIO ESPECIFIC IOCTLS */
2025 /* ----------------------------------------------------------- */
2026
2027 static int radio_querycap(struct file *file, void *priv,
2028 struct v4l2_capability *cap)
2029 {
2030 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2031
2032 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
2033 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2034 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
2035
2036 cap->capabilities = V4L2_CAP_TUNER;
2037 return 0;
2038 }
2039
2040 static int radio_g_tuner(struct file *file, void *priv,
2041 struct v4l2_tuner *t)
2042 {
2043 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2044
2045 if (unlikely(t->index > 0))
2046 return -EINVAL;
2047
2048 strcpy(t->name, "Radio");
2049 t->type = V4L2_TUNER_RADIO;
2050
2051 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2052
2053 return 0;
2054 }
2055
2056 static int radio_enum_input(struct file *file, void *priv,
2057 struct v4l2_input *i)
2058 {
2059 if (i->index != 0)
2060 return -EINVAL;
2061 strcpy(i->name, "Radio");
2062 i->type = V4L2_INPUT_TYPE_TUNER;
2063
2064 return 0;
2065 }
2066
2067 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2068 {
2069 if (unlikely(a->index))
2070 return -EINVAL;
2071
2072 strcpy(a->name, "Radio");
2073 return 0;
2074 }
2075
2076 static int radio_s_tuner(struct file *file, void *priv,
2077 struct v4l2_tuner *t)
2078 {
2079 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2080
2081 if (0 != t->index)
2082 return -EINVAL;
2083
2084 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2085
2086 return 0;
2087 }
2088
2089 static int radio_s_audio(struct file *file, void *fh,
2090 const struct v4l2_audio *a)
2091 {
2092 return 0;
2093 }
2094
2095 static int radio_s_input(struct file *file, void *fh, unsigned int i)
2096 {
2097 return 0;
2098 }
2099
2100 static int radio_queryctrl(struct file *file, void *priv,
2101 struct v4l2_queryctrl *qc)
2102 {
2103 int i;
2104
2105 if (qc->id < V4L2_CID_BASE ||
2106 qc->id >= V4L2_CID_LASTP1)
2107 return -EINVAL;
2108
2109 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2110 if (qc->id && qc->id == ac97_qctrl[i].id) {
2111 memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
2112 return 0;
2113 }
2114 }
2115
2116 return -EINVAL;
2117 }
2118
2119 /*
2120 * em28xx_v4l2_open()
2121 * inits the device and starts isoc transfer
2122 */
2123 static int em28xx_v4l2_open(struct file *filp)
2124 {
2125 int errCode = 0, radio = 0;
2126 struct video_device *vdev = video_devdata(filp);
2127 struct em28xx *dev = video_drvdata(filp);
2128 enum v4l2_buf_type fh_type = 0;
2129 struct em28xx_fh *fh;
2130 enum v4l2_field field;
2131
2132 switch (vdev->vfl_type) {
2133 case VFL_TYPE_GRABBER:
2134 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2135 break;
2136 case VFL_TYPE_VBI:
2137 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2138 break;
2139 case VFL_TYPE_RADIO:
2140 radio = 1;
2141 break;
2142 }
2143
2144 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2145 video_device_node_name(vdev), v4l2_type_names[fh_type],
2146 dev->users);
2147
2148
2149 if (mutex_lock_interruptible(&dev->lock))
2150 return -ERESTARTSYS;
2151 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
2152 if (!fh) {
2153 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
2154 mutex_unlock(&dev->lock);
2155 return -ENOMEM;
2156 }
2157 fh->dev = dev;
2158 fh->radio = radio;
2159 fh->type = fh_type;
2160 filp->private_data = fh;
2161
2162 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
2163 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2164 em28xx_set_alternate(dev);
2165 em28xx_resolution_set(dev);
2166
2167 /* Needed, since GPIO might have disabled power of
2168 some i2c device
2169 */
2170 em28xx_wake_i2c(dev);
2171
2172 }
2173 if (fh->radio) {
2174 em28xx_videodbg("video_open: setting radio device\n");
2175 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
2176 }
2177
2178 dev->users++;
2179
2180 if (dev->progressive)
2181 field = V4L2_FIELD_NONE;
2182 else
2183 field = V4L2_FIELD_INTERLACED;
2184
2185 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
2186 NULL, &dev->slock,
2187 V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
2188 sizeof(struct em28xx_buffer), fh, &dev->lock);
2189
2190 videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
2191 NULL, &dev->slock,
2192 V4L2_BUF_TYPE_VBI_CAPTURE,
2193 V4L2_FIELD_SEQ_TB,
2194 sizeof(struct em28xx_buffer), fh, &dev->lock);
2195 mutex_unlock(&dev->lock);
2196
2197 return errCode;
2198 }
2199
2200 /*
2201 * em28xx_realease_resources()
2202 * unregisters the v4l2,i2c and usb devices
2203 * called when the device gets disconected or at module unload
2204 */
2205 void em28xx_release_analog_resources(struct em28xx *dev)
2206 {
2207
2208 /*FIXME: I2C IR should be disconnected */
2209
2210 if (dev->radio_dev) {
2211 if (video_is_registered(dev->radio_dev))
2212 video_unregister_device(dev->radio_dev);
2213 else
2214 video_device_release(dev->radio_dev);
2215 dev->radio_dev = NULL;
2216 }
2217 if (dev->vbi_dev) {
2218 em28xx_info("V4L2 device %s deregistered\n",
2219 video_device_node_name(dev->vbi_dev));
2220 if (video_is_registered(dev->vbi_dev))
2221 video_unregister_device(dev->vbi_dev);
2222 else
2223 video_device_release(dev->vbi_dev);
2224 dev->vbi_dev = NULL;
2225 }
2226 if (dev->vdev) {
2227 em28xx_info("V4L2 device %s deregistered\n",
2228 video_device_node_name(dev->vdev));
2229 if (video_is_registered(dev->vdev))
2230 video_unregister_device(dev->vdev);
2231 else
2232 video_device_release(dev->vdev);
2233 dev->vdev = NULL;
2234 }
2235 }
2236
2237 /*
2238 * em28xx_v4l2_close()
2239 * stops streaming and deallocates all resources allocated by the v4l2
2240 * calls and ioctls
2241 */
2242 static int em28xx_v4l2_close(struct file *filp)
2243 {
2244 struct em28xx_fh *fh = filp->private_data;
2245 struct em28xx *dev = fh->dev;
2246 int errCode;
2247
2248 em28xx_videodbg("users=%d\n", dev->users);
2249
2250 mutex_lock(&dev->lock);
2251 if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
2252 videobuf_stop(&fh->vb_vidq);
2253 res_free(fh, EM28XX_RESOURCE_VIDEO);
2254 }
2255
2256 if (res_check(fh, EM28XX_RESOURCE_VBI)) {
2257 videobuf_stop(&fh->vb_vbiq);
2258 res_free(fh, EM28XX_RESOURCE_VBI);
2259 }
2260
2261 if (dev->users == 1) {
2262 /* the device is already disconnect,
2263 free the remaining resources */
2264 if (dev->state & DEV_DISCONNECTED) {
2265 em28xx_release_resources(dev);
2266 kfree(dev->alt_max_pkt_size);
2267 mutex_unlock(&dev->lock);
2268 kfree(dev);
2269 kfree(fh);
2270 return 0;
2271 }
2272
2273 /* Save some power by putting tuner to sleep */
2274 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
2275
2276 /* do this before setting alternate! */
2277 em28xx_uninit_isoc(dev, EM28XX_ANALOG_MODE);
2278 em28xx_set_mode(dev, EM28XX_SUSPEND);
2279
2280 /* set alternate 0 */
2281 dev->alt = 0;
2282 em28xx_videodbg("setting alternate 0\n");
2283 errCode = usb_set_interface(dev->udev, 0, 0);
2284 if (errCode < 0) {
2285 em28xx_errdev("cannot change alternate number to "
2286 "0 (error=%i)\n", errCode);
2287 }
2288 }
2289
2290 videobuf_mmap_free(&fh->vb_vidq);
2291 videobuf_mmap_free(&fh->vb_vbiq);
2292 kfree(fh);
2293 dev->users--;
2294 mutex_unlock(&dev->lock);
2295 return 0;
2296 }
2297
2298 /*
2299 * em28xx_v4l2_read()
2300 * will allocate buffers when called for the first time
2301 */
2302 static ssize_t
2303 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
2304 loff_t *pos)
2305 {
2306 struct em28xx_fh *fh = filp->private_data;
2307 struct em28xx *dev = fh->dev;
2308 int rc;
2309
2310 rc = check_dev(dev);
2311 if (rc < 0)
2312 return rc;
2313
2314 if (mutex_lock_interruptible(&dev->lock))
2315 return -ERESTARTSYS;
2316 /* FIXME: read() is not prepared to allow changing the video
2317 resolution while streaming. Seems a bug at em28xx_set_fmt
2318 */
2319
2320 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2321 if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
2322 rc = -EBUSY;
2323 else
2324 rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
2325 filp->f_flags & O_NONBLOCK);
2326 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2327 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2328 rc = -EBUSY;
2329 else
2330 rc = videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
2331 filp->f_flags & O_NONBLOCK);
2332 }
2333 mutex_unlock(&dev->lock);
2334
2335 return rc;
2336 }
2337
2338 /*
2339 * em28xx_poll()
2340 * will allocate buffers when called for the first time
2341 */
2342 static unsigned int em28xx_poll(struct file *filp, poll_table *wait)
2343 {
2344 struct em28xx_fh *fh = filp->private_data;
2345 struct em28xx *dev = fh->dev;
2346 int rc;
2347
2348 rc = check_dev(dev);
2349 if (rc < 0)
2350 return rc;
2351
2352 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
2353 if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
2354 return POLLERR;
2355 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
2356 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
2357 if (!res_get(fh, EM28XX_RESOURCE_VBI))
2358 return POLLERR;
2359 return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
2360 } else {
2361 return POLLERR;
2362 }
2363 }
2364
2365 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
2366 {
2367 struct em28xx_fh *fh = filp->private_data;
2368 struct em28xx *dev = fh->dev;
2369 unsigned int res;
2370
2371 mutex_lock(&dev->lock);
2372 res = em28xx_poll(filp, wait);
2373 mutex_unlock(&dev->lock);
2374 return res;
2375 }
2376
2377 /*
2378 * em28xx_v4l2_mmap()
2379 */
2380 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
2381 {
2382 struct em28xx_fh *fh = filp->private_data;
2383 struct em28xx *dev = fh->dev;
2384 int rc;
2385
2386 rc = check_dev(dev);
2387 if (rc < 0)
2388 return rc;
2389
2390 if (mutex_lock_interruptible(&dev->lock))
2391 return -ERESTARTSYS;
2392 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2393 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
2394 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
2395 rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
2396 mutex_unlock(&dev->lock);
2397
2398 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
2399 (unsigned long)vma->vm_start,
2400 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
2401 rc);
2402
2403 return rc;
2404 }
2405
2406 static const struct v4l2_file_operations em28xx_v4l_fops = {
2407 .owner = THIS_MODULE,
2408 .open = em28xx_v4l2_open,
2409 .release = em28xx_v4l2_close,
2410 .read = em28xx_v4l2_read,
2411 .poll = em28xx_v4l2_poll,
2412 .mmap = em28xx_v4l2_mmap,
2413 .unlocked_ioctl = video_ioctl2,
2414 };
2415
2416 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2417 .vidioc_querycap = vidioc_querycap,
2418 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2419 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2420 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2421 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2422 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2423 .vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap,
2424 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2425 .vidioc_g_audio = vidioc_g_audio,
2426 .vidioc_s_audio = vidioc_s_audio,
2427 .vidioc_cropcap = vidioc_cropcap,
2428 .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap,
2429 .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2430 .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
2431
2432 .vidioc_reqbufs = vidioc_reqbufs,
2433 .vidioc_querybuf = vidioc_querybuf,
2434 .vidioc_qbuf = vidioc_qbuf,
2435 .vidioc_dqbuf = vidioc_dqbuf,
2436 .vidioc_g_std = vidioc_g_std,
2437 .vidioc_querystd = vidioc_querystd,
2438 .vidioc_s_std = vidioc_s_std,
2439 .vidioc_g_parm = vidioc_g_parm,
2440 .vidioc_s_parm = vidioc_s_parm,
2441 .vidioc_enum_input = vidioc_enum_input,
2442 .vidioc_g_input = vidioc_g_input,
2443 .vidioc_s_input = vidioc_s_input,
2444 .vidioc_queryctrl = vidioc_queryctrl,
2445 .vidioc_g_ctrl = vidioc_g_ctrl,
2446 .vidioc_s_ctrl = vidioc_s_ctrl,
2447 .vidioc_streamon = vidioc_streamon,
2448 .vidioc_streamoff = vidioc_streamoff,
2449 .vidioc_g_tuner = vidioc_g_tuner,
2450 .vidioc_s_tuner = vidioc_s_tuner,
2451 .vidioc_g_frequency = vidioc_g_frequency,
2452 .vidioc_s_frequency = vidioc_s_frequency,
2453 #ifdef CONFIG_VIDEO_ADV_DEBUG
2454 .vidioc_g_register = vidioc_g_register,
2455 .vidioc_s_register = vidioc_s_register,
2456 .vidioc_g_chip_ident = vidioc_g_chip_ident,
2457 #endif
2458 };
2459
2460 static const struct video_device em28xx_video_template = {
2461 .fops = &em28xx_v4l_fops,
2462 .release = video_device_release,
2463 .ioctl_ops = &video_ioctl_ops,
2464
2465 .tvnorms = V4L2_STD_ALL,
2466 .current_norm = V4L2_STD_PAL,
2467 };
2468
2469 static const struct v4l2_file_operations radio_fops = {
2470 .owner = THIS_MODULE,
2471 .open = em28xx_v4l2_open,
2472 .release = em28xx_v4l2_close,
2473 .unlocked_ioctl = video_ioctl2,
2474 };
2475
2476 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2477 .vidioc_querycap = radio_querycap,
2478 .vidioc_g_tuner = radio_g_tuner,
2479 .vidioc_enum_input = radio_enum_input,
2480 .vidioc_g_audio = radio_g_audio,
2481 .vidioc_s_tuner = radio_s_tuner,
2482 .vidioc_s_audio = radio_s_audio,
2483 .vidioc_s_input = radio_s_input,
2484 .vidioc_queryctrl = radio_queryctrl,
2485 .vidioc_g_ctrl = vidioc_g_ctrl,
2486 .vidioc_s_ctrl = vidioc_s_ctrl,
2487 .vidioc_g_frequency = vidioc_g_frequency,
2488 .vidioc_s_frequency = vidioc_s_frequency,
2489 #ifdef CONFIG_VIDEO_ADV_DEBUG
2490 .vidioc_g_register = vidioc_g_register,
2491 .vidioc_s_register = vidioc_s_register,
2492 #endif
2493 };
2494
2495 static struct video_device em28xx_radio_template = {
2496 .name = "em28xx-radio",
2497 .fops = &radio_fops,
2498 .ioctl_ops = &radio_ioctl_ops,
2499 };
2500
2501 /******************************** usb interface ******************************/
2502
2503
2504
2505 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2506 const struct video_device *template,
2507 const char *type_name)
2508 {
2509 struct video_device *vfd;
2510
2511 vfd = video_device_alloc();
2512 if (NULL == vfd)
2513 return NULL;
2514
2515 *vfd = *template;
2516 vfd->v4l2_dev = &dev->v4l2_dev;
2517 vfd->release = video_device_release;
2518 vfd->debug = video_debug;
2519 vfd->lock = &dev->lock;
2520
2521 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2522 dev->name, type_name);
2523
2524 video_set_drvdata(vfd, dev);
2525 return vfd;
2526 }
2527
2528 int em28xx_register_analog_devices(struct em28xx *dev)
2529 {
2530 u8 val;
2531 int ret;
2532 unsigned int maxw;
2533
2534 printk(KERN_INFO "%s: v4l2 driver version %s\n",
2535 dev->name, EM28XX_VERSION);
2536
2537 /* set default norm */
2538 dev->norm = em28xx_video_template.current_norm;
2539 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
2540 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2541
2542 /* Analog specific initialization */
2543 dev->format = &format[0];
2544
2545 maxw = norm_maxw(dev);
2546 /* MaxPacketSize for em2800 is too small to capture at full resolution
2547 * use half of maxw as the scaler can only scale to 50% */
2548 if (dev->board.is_em2800)
2549 maxw /= 2;
2550
2551 em28xx_set_video_format(dev, format[0].fourcc,
2552 maxw, norm_maxh(dev));
2553
2554 video_mux(dev, 0);
2555
2556 /* Audio defaults */
2557 dev->mute = 1;
2558 dev->volume = 0x1f;
2559
2560 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2561 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2562 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2563 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2564
2565 em28xx_set_outfmt(dev);
2566 em28xx_colorlevels_set_default(dev);
2567 em28xx_compression_disable(dev);
2568
2569 /* allocate and fill video video_device struct */
2570 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
2571 if (!dev->vdev) {
2572 em28xx_errdev("cannot allocate video_device.\n");
2573 return -ENODEV;
2574 }
2575
2576 /* register v4l2 video video_device */
2577 ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2578 video_nr[dev->devno]);
2579 if (ret) {
2580 em28xx_errdev("unable to register video device (error=%i).\n",
2581 ret);
2582 return ret;
2583 }
2584
2585 /* Allocate and fill vbi video_device struct */
2586 if (em28xx_vbi_supported(dev) == 1) {
2587 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2588 "vbi");
2589
2590 /* register v4l2 vbi video_device */
2591 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2592 vbi_nr[dev->devno]);
2593 if (ret < 0) {
2594 em28xx_errdev("unable to register vbi device\n");
2595 return ret;
2596 }
2597 }
2598
2599 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2600 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2601 "radio");
2602 if (!dev->radio_dev) {
2603 em28xx_errdev("cannot allocate video_device.\n");
2604 return -ENODEV;
2605 }
2606 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2607 radio_nr[dev->devno]);
2608 if (ret < 0) {
2609 em28xx_errdev("can't register radio device\n");
2610 return ret;
2611 }
2612 em28xx_info("Registered radio device as %s\n",
2613 video_device_node_name(dev->radio_dev));
2614 }
2615
2616 em28xx_info("V4L2 video device registered as %s\n",
2617 video_device_node_name(dev->vdev));
2618
2619 if (dev->vbi_dev)
2620 em28xx_info("V4L2 VBI device registered as %s\n",
2621 video_device_node_name(dev->vbi_dev));
2622
2623 return 0;
2624 }
Linux kernel - Deliverables
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