/drivers/media/video/em28xx/em28xx-video.c
C | 2579 lines | 1927 code | 455 blank | 197 comment | 371 complexity | b28f8b86652de0801c8e5b89e6d309ce MD5 | raw file
Possible License(s): CC-BY-SA-3.0, GPL-2.0, LGPL-2.0, AGPL-1.0
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1/*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
3 video capture devices
4
5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
6 Markus Rechberger <mrechberger@gmail.com>
7 Mauro Carvalho Chehab <mchehab@infradead.org>
8 Sascha Sommer <saschasommer@freenet.de>
9
10 Some parts based on SN9C10x PC Camera Controllers GPL driver made
11 by Luca Risolia <luca.risolia@studio.unibo.it>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#include <linux/init.h>
29#include <linux/list.h>
30#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/bitmap.h>
33#include <linux/usb.h>
34#include <linux/i2c.h>
35#include <linux/version.h>
36#include <linux/mm.h>
37#include <linux/mutex.h>
38#include <linux/slab.h>
39
40#include "em28xx.h"
41#include <media/v4l2-common.h>
42#include <media/v4l2-ioctl.h>
43#include <media/v4l2-chip-ident.h>
44#include <media/msp3400.h>
45#include <media/tuner.h>
46
47#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
48 "Markus Rechberger <mrechberger@gmail.com>, " \
49 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
50 "Sascha Sommer <saschasommer@freenet.de>"
51
52#define DRIVER_DESC "Empia em28xx based USB video device driver"
53#define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 2)
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
60static unsigned int isoc_debug;
61module_param(isoc_debug, int, 0644);
62MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
63
64#define em28xx_isocdbg(fmt, arg...) \
65do {\
66 if (isoc_debug) { \
67 printk(KERN_INFO "%s %s :"fmt, \
68 dev->name, __func__ , ##arg); \
69 } \
70 } while (0)
71
72MODULE_AUTHOR(DRIVER_AUTHOR);
73MODULE_DESCRIPTION(DRIVER_DESC);
74MODULE_LICENSE("GPL");
75
76static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
77static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
78static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
79
80module_param_array(video_nr, int, NULL, 0444);
81module_param_array(vbi_nr, int, NULL, 0444);
82module_param_array(radio_nr, int, NULL, 0444);
83MODULE_PARM_DESC(video_nr, "video device numbers");
84MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
85MODULE_PARM_DESC(radio_nr, "radio device numbers");
86
87static unsigned int video_debug;
88module_param(video_debug, int, 0644);
89MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
90
91/* supported video standards */
92static struct em28xx_fmt format[] = {
93 {
94 .name = "16 bpp YUY2, 4:2:2, packed",
95 .fourcc = V4L2_PIX_FMT_YUYV,
96 .depth = 16,
97 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
98 }, {
99 .name = "16 bpp RGB 565, LE",
100 .fourcc = V4L2_PIX_FMT_RGB565,
101 .depth = 16,
102 .reg = EM28XX_OUTFMT_RGB_16_656,
103 }, {
104 .name = "8 bpp Bayer BGBG..GRGR",
105 .fourcc = V4L2_PIX_FMT_SBGGR8,
106 .depth = 8,
107 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
108 }, {
109 .name = "8 bpp Bayer GRGR..BGBG",
110 .fourcc = V4L2_PIX_FMT_SGRBG8,
111 .depth = 8,
112 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
113 }, {
114 .name = "8 bpp Bayer GBGB..RGRG",
115 .fourcc = V4L2_PIX_FMT_SGBRG8,
116 .depth = 8,
117 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
118 }, {
119 .name = "12 bpp YUV411",
120 .fourcc = V4L2_PIX_FMT_YUV411P,
121 .depth = 12,
122 .reg = EM28XX_OUTFMT_YUV411,
123 },
124};
125
126/* supported controls */
127/* Common to all boards */
128static struct v4l2_queryctrl ac97_qctrl[] = {
129 {
130 .id = V4L2_CID_AUDIO_VOLUME,
131 .type = V4L2_CTRL_TYPE_INTEGER,
132 .name = "Volume",
133 .minimum = 0x0,
134 .maximum = 0x1f,
135 .step = 0x1,
136 .default_value = 0x1f,
137 .flags = V4L2_CTRL_FLAG_SLIDER,
138 }, {
139 .id = V4L2_CID_AUDIO_MUTE,
140 .type = V4L2_CTRL_TYPE_BOOLEAN,
141 .name = "Mute",
142 .minimum = 0,
143 .maximum = 1,
144 .step = 1,
145 .default_value = 1,
146 .flags = 0,
147 }
148};
149
150/* ------------------------------------------------------------------
151 DMA and thread functions
152 ------------------------------------------------------------------*/
153
154/*
155 * Announces that a buffer were filled and request the next
156 */
157static inline void buffer_filled(struct em28xx *dev,
158 struct em28xx_dmaqueue *dma_q,
159 struct em28xx_buffer *buf)
160{
161 /* Advice that buffer was filled */
162 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
163 buf->vb.state = VIDEOBUF_DONE;
164 buf->vb.field_count++;
165 do_gettimeofday(&buf->vb.ts);
166
167 dev->isoc_ctl.vid_buf = NULL;
168
169 list_del(&buf->vb.queue);
170 wake_up(&buf->vb.done);
171}
172
173static inline void vbi_buffer_filled(struct em28xx *dev,
174 struct em28xx_dmaqueue *dma_q,
175 struct em28xx_buffer *buf)
176{
177 /* Advice that buffer was filled */
178 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
179
180 buf->vb.state = VIDEOBUF_DONE;
181 buf->vb.field_count++;
182 do_gettimeofday(&buf->vb.ts);
183
184 dev->isoc_ctl.vbi_buf = NULL;
185
186 list_del(&buf->vb.queue);
187 wake_up(&buf->vb.done);
188}
189
190/*
191 * Identify the buffer header type and properly handles
192 */
193static void em28xx_copy_video(struct em28xx *dev,
194 struct em28xx_dmaqueue *dma_q,
195 struct em28xx_buffer *buf,
196 unsigned char *p,
197 unsigned char *outp, unsigned long len)
198{
199 void *fieldstart, *startwrite, *startread;
200 int linesdone, currlinedone, offset, lencopy, remain;
201 int bytesperline = dev->width << 1;
202
203 if (dma_q->pos + len > buf->vb.size)
204 len = buf->vb.size - dma_q->pos;
205
206 if (p[0] != 0x88 && p[0] != 0x22) {
207 em28xx_isocdbg("frame is not complete\n");
208 len += 4;
209 } else
210 p += 4;
211
212 startread = p;
213 remain = len;
214
215 if (dev->progressive)
216 fieldstart = outp;
217 else {
218 /* Interlaces two half frames */
219 if (buf->top_field)
220 fieldstart = outp;
221 else
222 fieldstart = outp + bytesperline;
223 }
224
225 linesdone = dma_q->pos / bytesperline;
226 currlinedone = dma_q->pos % bytesperline;
227
228 if (dev->progressive)
229 offset = linesdone * bytesperline + currlinedone;
230 else
231 offset = linesdone * bytesperline * 2 + currlinedone;
232
233 startwrite = fieldstart + offset;
234 lencopy = bytesperline - currlinedone;
235 lencopy = lencopy > remain ? remain : lencopy;
236
237 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
238 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
239 ((char *)startwrite + lencopy) -
240 ((char *)outp + buf->vb.size));
241 remain = (char *)outp + buf->vb.size - (char *)startwrite;
242 lencopy = remain;
243 }
244 if (lencopy <= 0)
245 return;
246 memcpy(startwrite, startread, lencopy);
247
248 remain -= lencopy;
249
250 while (remain > 0) {
251 startwrite += lencopy + bytesperline;
252 startread += lencopy;
253 if (bytesperline > remain)
254 lencopy = remain;
255 else
256 lencopy = bytesperline;
257
258 if ((char *)startwrite + lencopy > (char *)outp +
259 buf->vb.size) {
260 em28xx_isocdbg("Overflow of %zi bytes past buffer end"
261 "(2)\n",
262 ((char *)startwrite + lencopy) -
263 ((char *)outp + buf->vb.size));
264 lencopy = remain = (char *)outp + buf->vb.size -
265 (char *)startwrite;
266 }
267 if (lencopy <= 0)
268 break;
269
270 memcpy(startwrite, startread, lencopy);
271
272 remain -= lencopy;
273 }
274
275 dma_q->pos += len;
276}
277
278static void em28xx_copy_vbi(struct em28xx *dev,
279 struct em28xx_dmaqueue *dma_q,
280 struct em28xx_buffer *buf,
281 unsigned char *p,
282 unsigned char *outp, unsigned long len)
283{
284 void *startwrite, *startread;
285 int offset;
286 int bytesperline = dev->vbi_width;
287
288 if (dev == NULL) {
289 em28xx_isocdbg("dev is null\n");
290 return;
291 }
292
293 if (dma_q == NULL) {
294 em28xx_isocdbg("dma_q is null\n");
295 return;
296 }
297 if (buf == NULL) {
298 return;
299 }
300 if (p == NULL) {
301 em28xx_isocdbg("p is null\n");
302 return;
303 }
304 if (outp == NULL) {
305 em28xx_isocdbg("outp is null\n");
306 return;
307 }
308
309 if (dma_q->pos + len > buf->vb.size)
310 len = buf->vb.size - dma_q->pos;
311
312 if ((p[0] == 0x33 && p[1] == 0x95) ||
313 (p[0] == 0x88 && p[1] == 0x88)) {
314 /* Header field, advance past it */
315 p += 4;
316 } else {
317 len += 4;
318 }
319
320 startread = p;
321
322 startwrite = outp + dma_q->pos;
323 offset = dma_q->pos;
324
325 /* Make sure the bottom field populates the second half of the frame */
326 if (buf->top_field == 0) {
327 startwrite += bytesperline * dev->vbi_height;
328 offset += bytesperline * dev->vbi_height;
329 }
330
331 memcpy(startwrite, startread, len);
332 dma_q->pos += len;
333}
334
335static inline void print_err_status(struct em28xx *dev,
336 int packet, int status)
337{
338 char *errmsg = "Unknown";
339
340 switch (status) {
341 case -ENOENT:
342 errmsg = "unlinked synchronuously";
343 break;
344 case -ECONNRESET:
345 errmsg = "unlinked asynchronuously";
346 break;
347 case -ENOSR:
348 errmsg = "Buffer error (overrun)";
349 break;
350 case -EPIPE:
351 errmsg = "Stalled (device not responding)";
352 break;
353 case -EOVERFLOW:
354 errmsg = "Babble (bad cable?)";
355 break;
356 case -EPROTO:
357 errmsg = "Bit-stuff error (bad cable?)";
358 break;
359 case -EILSEQ:
360 errmsg = "CRC/Timeout (could be anything)";
361 break;
362 case -ETIME:
363 errmsg = "Device does not respond";
364 break;
365 }
366 if (packet < 0) {
367 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
368 } else {
369 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
370 packet, status, errmsg);
371 }
372}
373
374/*
375 * video-buf generic routine to get the next available buffer
376 */
377static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
378 struct em28xx_buffer **buf)
379{
380 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
381 char *outp;
382
383 if (list_empty(&dma_q->active)) {
384 em28xx_isocdbg("No active queue to serve\n");
385 dev->isoc_ctl.vid_buf = NULL;
386 *buf = NULL;
387 return;
388 }
389
390 /* Get the next buffer */
391 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
392
393 /* Cleans up buffer - Usefull for testing for frame/URB loss */
394 outp = videobuf_to_vmalloc(&(*buf)->vb);
395 memset(outp, 0, (*buf)->vb.size);
396
397 dev->isoc_ctl.vid_buf = *buf;
398
399 return;
400}
401
402/*
403 * video-buf generic routine to get the next available VBI buffer
404 */
405static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
406 struct em28xx_buffer **buf)
407{
408 struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
409 char *outp;
410
411 if (list_empty(&dma_q->active)) {
412 em28xx_isocdbg("No active queue to serve\n");
413 dev->isoc_ctl.vbi_buf = NULL;
414 *buf = NULL;
415 return;
416 }
417
418 /* Get the next buffer */
419 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
420 /* Cleans up buffer - Usefull for testing for frame/URB loss */
421 outp = videobuf_to_vmalloc(&(*buf)->vb);
422 memset(outp, 0x00, (*buf)->vb.size);
423
424 dev->isoc_ctl.vbi_buf = *buf;
425
426 return;
427}
428
429/*
430 * Controls the isoc copy of each urb packet
431 */
432static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
433{
434 struct em28xx_buffer *buf;
435 struct em28xx_dmaqueue *dma_q = &dev->vidq;
436 unsigned char *outp = NULL;
437 int i, len = 0, rc = 1;
438 unsigned char *p;
439
440 if (!dev)
441 return 0;
442
443 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
444 return 0;
445
446 if (urb->status < 0) {
447 print_err_status(dev, -1, urb->status);
448 if (urb->status == -ENOENT)
449 return 0;
450 }
451
452 buf = dev->isoc_ctl.vid_buf;
453 if (buf != NULL)
454 outp = videobuf_to_vmalloc(&buf->vb);
455
456 for (i = 0; i < urb->number_of_packets; i++) {
457 int status = urb->iso_frame_desc[i].status;
458
459 if (status < 0) {
460 print_err_status(dev, i, status);
461 if (urb->iso_frame_desc[i].status != -EPROTO)
462 continue;
463 }
464
465 len = urb->iso_frame_desc[i].actual_length - 4;
466
467 if (urb->iso_frame_desc[i].actual_length <= 0) {
468 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
469 continue;
470 }
471 if (urb->iso_frame_desc[i].actual_length >
472 dev->max_pkt_size) {
473 em28xx_isocdbg("packet bigger than packet size");
474 continue;
475 }
476
477 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
478
479 /* FIXME: incomplete buffer checks where removed to make
480 logic simpler. Impacts of those changes should be evaluated
481 */
482 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
483 em28xx_isocdbg("VBI HEADER!!!\n");
484 /* FIXME: Should add vbi copy */
485 continue;
486 }
487 if (p[0] == 0x22 && p[1] == 0x5a) {
488 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
489 len, (p[2] & 1) ? "odd" : "even");
490
491 if (dev->progressive || !(p[2] & 1)) {
492 if (buf != NULL)
493 buffer_filled(dev, dma_q, buf);
494 get_next_buf(dma_q, &buf);
495 if (buf == NULL)
496 outp = NULL;
497 else
498 outp = videobuf_to_vmalloc(&buf->vb);
499 }
500
501 if (buf != NULL) {
502 if (p[2] & 1)
503 buf->top_field = 0;
504 else
505 buf->top_field = 1;
506 }
507
508 dma_q->pos = 0;
509 }
510 if (buf != NULL)
511 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
512 }
513 return rc;
514}
515
516/* Version of isoc handler that takes into account a mixture of video and
517 VBI data */
518static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
519{
520 struct em28xx_buffer *buf, *vbi_buf;
521 struct em28xx_dmaqueue *dma_q = &dev->vidq;
522 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
523 unsigned char *outp = NULL;
524 unsigned char *vbioutp = NULL;
525 int i, len = 0, rc = 1;
526 unsigned char *p;
527 int vbi_size;
528
529 if (!dev)
530 return 0;
531
532 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
533 return 0;
534
535 if (urb->status < 0) {
536 print_err_status(dev, -1, urb->status);
537 if (urb->status == -ENOENT)
538 return 0;
539 }
540
541 buf = dev->isoc_ctl.vid_buf;
542 if (buf != NULL)
543 outp = videobuf_to_vmalloc(&buf->vb);
544
545 vbi_buf = dev->isoc_ctl.vbi_buf;
546 if (vbi_buf != NULL)
547 vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
548
549 for (i = 0; i < urb->number_of_packets; i++) {
550 int status = urb->iso_frame_desc[i].status;
551
552 if (status < 0) {
553 print_err_status(dev, i, status);
554 if (urb->iso_frame_desc[i].status != -EPROTO)
555 continue;
556 }
557
558 len = urb->iso_frame_desc[i].actual_length - 4;
559
560 if (urb->iso_frame_desc[i].actual_length <= 0) {
561 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
562 continue;
563 }
564 if (urb->iso_frame_desc[i].actual_length >
565 dev->max_pkt_size) {
566 em28xx_isocdbg("packet bigger than packet size");
567 continue;
568 }
569
570 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
571
572 /* capture type 0 = vbi start
573 capture type 1 = video start
574 capture type 2 = video in progress */
575 if (p[0] == 0x33 && p[1] == 0x95) {
576 dev->capture_type = 0;
577 dev->vbi_read = 0;
578 em28xx_isocdbg("VBI START HEADER!!!\n");
579 dev->cur_field = p[2];
580 }
581
582 vbi_size = dev->vbi_width * dev->vbi_height;
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
666static int
667buffer_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 */
693static 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
719static int
720buffer_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
765fail:
766 free_buffer(vq, buf);
767 return rc;
768}
769
770static void
771buffer_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
785static 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
799static 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
808static 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 */
839static 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
862static int res_check(struct em28xx_fh *fh, unsigned int bit)
863{
864 return fh->resources & bit;
865}
866
867static int res_locked(struct em28xx *dev, unsigned int bit)
868{
869 return dev->resources & bit;
870}
871
872static 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
885static 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 */
902static 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 */
921static 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 */
940static 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
951handle:
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
968static 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
983static 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
1003static 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
1029static 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
1040static 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 } else {
1064 /* width must even because of the YUYV format
1065 height must be even because of interlacing */
1066 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1067 1, 0);
1068 }
1069
1070 get_scale(dev, width, height, &hscale, &vscale);
1071
1072 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1073 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1074
1075 f->fmt.pix.width = width;
1076 f->fmt.pix.height = height;
1077 f->fmt.pix.pixelformat = fmt->fourcc;
1078 f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
1079 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1080 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1081 if (dev->progressive)
1082 f->fmt.pix.field = V4L2_FIELD_NONE;
1083 else
1084 f->fmt.pix.field = dev->interlaced ?
1085 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1086
1087 return 0;
1088}
1089
1090static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1091 unsigned width, unsigned height)
1092{
1093 struct em28xx_fmt *fmt;
1094
1095 fmt = format_by_fourcc(fourcc);
1096 if (!fmt)
1097 return -EINVAL;
1098
1099 dev->format = fmt;
1100 dev->width = width;
1101 dev->height = height;
1102
1103 /* set new image size */
1104 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1105
1106 em28xx_set_alternate(dev);
1107 em28xx_resolution_set(dev);
1108
1109 return 0;
1110}
1111
1112static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1113 struct v4l2_format *f)
1114{
1115 struct em28xx_fh *fh = priv;
1116 struct em28xx *dev = fh->dev;
1117 int rc;
1118
1119 rc = check_dev(dev);
1120 if (rc < 0)
1121 return rc;
1122
1123 mutex_lock(&dev->lock);
1124
1125 vidioc_try_fmt_vid_cap(file, priv, f);
1126
1127 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1128 em28xx_errdev("%s queue busy\n", __func__);
1129 rc = -EBUSY;
1130 goto out;
1131 }
1132
1133 rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1134 f->fmt.pix.width, f->fmt.pix.height);
1135
1136out:
1137 mutex_unlock(&dev->lock);
1138 return rc;
1139}
1140
1141static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1142{
1143 struct em28xx_fh *fh = priv;
1144 struct em28xx *dev = fh->dev;
1145 int rc;
1146
1147 rc = check_dev(dev);
1148 if (rc < 0)
1149 return rc;
1150
1151 *norm = dev->norm;
1152
1153 return 0;
1154}
1155
1156static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
1157{
1158 struct em28xx_fh *fh = priv;
1159 struct em28xx *dev = fh->dev;
1160 struct v4l2_format f;
1161 int rc;
1162
1163 rc = check_dev(dev);
1164 if (rc < 0)
1165 return rc;
1166
1167 mutex_lock(&dev->lock);
1168 dev->norm = *norm;
1169
1170 /* Adjusts width/height, if needed */
1171 f.fmt.pix.width = dev->width;
1172 f.fmt.pix.height = dev->height;
1173 vidioc_try_fmt_vid_cap(file, priv, &f);
1174
1175 /* set new image size */
1176 dev->width = f.fmt.pix.width;
1177 dev->height = f.fmt.pix.height;
1178 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1179
1180 em28xx_resolution_set(dev);
1181 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1182
1183 mutex_unlock(&dev->lock);
1184 return 0;
1185}
1186
1187static int vidioc_g_parm(struct file *file, void *priv,
1188 struct v4l2_streamparm *p)
1189{
1190 struct em28xx_fh *fh = priv;
1191 struct em28xx *dev = fh->dev;
1192 int rc = 0;
1193
1194 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1195 return -EINVAL;
1196
1197 if (dev->board.is_webcam)
1198 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1199 video, g_parm, p);
1200 else
1201 v4l2_video_std_frame_period(dev->norm,
1202 &p->parm.capture.timeperframe);
1203
1204 return rc;
1205}
1206
1207static int vidioc_s_parm(struct file *file, void *priv,
1208 struct v4l2_streamparm *p)
1209{
1210 struct em28xx_fh *fh = priv;
1211 struct em28xx *dev = fh->dev;
1212
1213 if (!dev->board.is_webcam)
1214 return -EINVAL;
1215
1216 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1217 return -EINVAL;
1218
1219 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1220}
1221
1222static const char *iname[] = {
1223 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1224 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1225 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1226 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1227 [EM28XX_VMUX_SVIDEO] = "S-Video",
1228 [EM28XX_VMUX_TELEVISION] = "Television",
1229 [EM28XX_VMUX_CABLE] = "Cable TV",
1230 [EM28XX_VMUX_DVB] = "DVB",
1231 [EM28XX_VMUX_DEBUG] = "for debug only",
1232};
1233
1234static int vidioc_enum_input(struct file *file, void *priv,
1235 struct v4l2_input *i)
1236{
1237 struct em28xx_fh *fh = priv;
1238 struct em28xx *dev = fh->dev;
1239 unsigned int n;
1240
1241 n = i->index;
1242 if (n >= MAX_EM28XX_INPUT)
1243 return -EINVAL;
1244 if (0 == INPUT(n)->type)
1245 return -EINVAL;
1246
1247 i->index = n;
1248 i->type = V4L2_INPUT_TYPE_CAMERA;
1249
1250 strcpy(i->name, iname[INPUT(n)->type]);
1251
1252 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1253 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1254 i->type = V4L2_INPUT_TYPE_TUNER;
1255
1256 i->std = dev->vdev->tvnorms;
1257
1258 return 0;
1259}
1260
1261static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1262{
1263 struct em28xx_fh *fh = priv;
1264 struct em28xx *dev = fh->dev;
1265
1266 *i = dev->ctl_input;
1267
1268 return 0;
1269}
1270
1271static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1272{
1273 struct em28xx_fh *fh = priv;
1274 struct em28xx *dev = fh->dev;
1275 int rc;
1276
1277 rc = check_dev(dev);
1278 if (rc < 0)
1279 return rc;
1280
1281 if (i >= MAX_EM28XX_INPUT)
1282 return -EINVAL;
1283 if (0 == INPUT(i)->type)
1284 return -EINVAL;
1285
1286 dev->ctl_input = i;
1287
1288 mutex_lock(&dev->lock);
1289 video_mux(dev, dev->ctl_input);
1290 mutex_unlock(&dev->lock);
1291 return 0;
1292}
1293
1294static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1295{
1296 struct em28xx_fh *fh = priv;
1297 struct em28xx *dev = fh->dev;
1298
1299 if (!dev->audio_mode.has_audio)
1300 return -EINVAL;
1301
1302 switch (a->index) {
1303 case EM28XX_AMUX_VIDEO:
1304 strcpy(a->name, "Television");
1305 break;
1306 case EM28XX_AMUX_LINE_IN:
1307 strcpy(a->name, "Line In");
1308 break;
1309 case EM28XX_AMUX_VIDEO2:
1310 strcpy(a->name, "Television alt");
1311 break;
1312 case EM28XX_AMUX_PHONE:
1313 strcpy(a->name, "Phone");
1314 break;
1315 case EM28XX_AMUX_MIC:
1316 strcpy(a->name, "Mic");
1317 break;
1318 case EM28XX_AMUX_CD:
1319 strcpy(a->name, "CD");
1320 break;
1321 case EM28XX_AMUX_AUX:
1322 strcpy(a->name, "Aux");
1323 break;
1324 case EM28XX_AMUX_PCM_OUT:
1325 strcpy(a->name, "PCM");
1326 break;
1327 default:
1328 return -EINVAL;
1329 }
1330
1331 a->index = dev->ctl_ainput;
1332 a->capability = V4L2_AUDCAP_STEREO;
1333
1334 return 0;
1335}
1336
1337static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1338{
1339 struct em28xx_fh *fh = priv;
1340 struct em28xx *dev = fh->dev;
1341
1342
1343 if (!dev->audio_mode.has_audio)
1344 return -EINVAL;
1345
1346 if (a->index >= MAX_EM28XX_INPUT)
1347 return -EINVAL;
1348 if (0 == INPUT(a->index)->type)
1349 return -EINVAL;
1350
1351 mutex_lock(&dev->lock);
1352
1353 dev->ctl_ainput = INPUT(a->index)->amux;
1354 dev->ctl_aoutput = INPUT(a->index)->aout;
1355
1356 if (!dev->ctl_aoutput)
1357 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1358
1359 mutex_unlock(&dev->lock);
1360 return 0;
1361}
1362
1363static int vidioc_queryctrl(struct file *file, void *priv,
1364 struct v4l2_queryctrl *qc)
1365{
1366 struct em28xx_fh *fh = priv;
1367 struct em28xx *dev = fh->dev;
1368 int id = qc->id;
1369 int rc;
1370
1371 rc = check_dev(dev);
1372 if (rc < 0)
1373 return rc;
1374
1375 memset(qc, 0, sizeof(*qc));
1376
1377 qc->id = id;
1378
1379 /* enumberate AC97 controls */
1380 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
1381 rc = ac97_queryctrl(qc);
1382 if (!rc)
1383 return 0;
1384 }
1385
1386 /* enumberate V4L2 device controls */
1387 mutex_lock(&dev->lock);
1388 v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1389 mutex_unlock(&dev->lock);
1390
1391 if (qc->type)
1392 return 0;
1393 else
1394 return -EINVAL;
1395}
1396
1397static int vidioc_g_ctrl(struct file *file, void *priv,
1398 struct v4l2_control *ctrl)
1399{
1400 struct em28xx_fh *fh = priv;
1401 struct em28xx *dev = fh->dev;
1402 int rc;
1403
1404 rc = check_dev(dev);
1405 if (rc < 0)
1406 return rc;
1407 rc = 0;
1408
1409 mutex_lock(&dev->lock);
1410
1411 /* Set an AC97 control */
1412 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1413 rc = ac97_get_ctrl(dev, ctrl);
1414 else
1415 rc = 1;
1416
1417 /* It were not an AC97 control. Sends it to the v4l2 dev interface */
1418 if (rc == 1) {
1419 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1420 rc = 0;
1421 }
1422
1423 mutex_unlock(&dev->lock);
1424 return rc;
1425}
1426
1427static int vidioc_s_ctrl(struct file *file, void *priv,
1428 struct v4l2_control *ctrl)
1429{
1430 struct em28xx_fh *fh = priv;
1431 struct em28xx *dev = fh->dev;
1432 int rc;
1433
1434 rc = check_dev(dev);
1435 if (rc < 0)
1436 return rc;
1437
1438 mutex_lock(&dev->lock);
1439
1440 /* Set an AC97 control */
1441 if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
1442 rc = ac97_set_ctrl(dev, ctrl);
1443 else
1444 rc = 1;
1445
1446 /* It isn't an AC97 control. Sends it to the v4l2 dev interface */
1447 if (rc == 1) {
1448 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1449
1450 /*
1451 * In the case of non-AC97 volume controls, we still need
1452 * to do some setups at em28xx, in order to mute/unmute
1453 * and to adjust audio volume. However, the value ranges
1454 * should be checked by the corresponding V4L subdriver.
1455 */
1456 switch (ctrl->id) {
1457 case V4L2_CID_AUDIO_MUTE:
1458 dev->mute = ctrl->value;
1459 rc = em28xx_audio_analog_set(dev);
1460 break;
1461 case V4L2_CID_AUDIO_VOLUME:
1462 dev->volume = ctrl->value;
1463 rc = em28xx_audio_analog_set(dev);
1464 }
1465 }
1466
1467 mutex_unlock(&dev->lock);
1468 return rc;
1469}
1470
1471static int vidioc_g_tuner(struct file *file, void *priv,
1472 struct v4l2_tuner *t)
1473{
1474 struct em28xx_fh *fh = priv;
1475 struct em28xx *dev = fh->dev;
1476 int rc;
1477
1478 rc = check_dev(dev);
1479 if (rc < 0)
1480 return rc;
1481
1482 if (0 != t->index)
1483 return -EINVAL;
1484
1485 strcpy(t->name, "Tuner");
1486
1487 mutex_lock(&dev->lock);
1488 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1489 mutex_unlock(&dev->lock);
1490
1491 return 0;
1492}
1493
1494static int vidioc_s_tuner(struct file *file, void *priv,
1495 struct v4l2_tuner *t)
1496{
1497 struct em28xx_fh *fh = priv;
1498 struct em28xx *dev = fh->dev;
1499 int rc;
1500
1501 rc = check_dev(dev);
1502 if (rc < 0)
1503 return rc;
1504
1505 if (0 != t->index)
1506 return -EINVAL;
1507
1508 mutex_lock(&dev->lock);
1509 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1510 mutex_unlock(&dev->lock);
1511
1512 return 0;
1513}
1514
1515static int vidioc_g_frequency(struct file *file, void *priv,
1516 struct v4l2_frequency *f)
1517{
1518 struct em28xx_fh *fh = priv;
1519 struct em28xx *dev = fh->dev;
1520
1521 mutex_lock(&dev->lock);
1522 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1523 f->frequency = dev->ctl_freq;
1524 mutex_unlock(&dev->lock);
1525
1526 return 0;
1527}
1528
1529static int vidioc_s_frequency(struct file *file, void *priv,
1530 struct v4l2_frequency *f)
1531{
1532 struct em28xx_fh *fh = priv;
1533 struct em28xx *dev = fh->dev;
1534 int rc;
1535
1536 rc = check_dev(dev);
1537 if (rc < 0)
1538 return rc;
1539
1540 if (0 != f->tuner)
1541 return -EINVAL;
1542
1543 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1544 return -EINVAL;
1545 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1546 return -EINVAL;
1547
1548 mutex_lock(&dev->lock);
1549
1550 dev->ctl_freq = f->frequency;
1551 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1552
1553 mutex_unlock(&dev->lock);
1554
1555 return 0;
1556}
1557
1558#ifdef CONFIG_VIDEO_ADV_DEBUG
1559static int em28xx_reg_len(int reg)
1560{
1561 switch (reg) {
1562 case EM28XX_R40_AC97LSB:
1563 case EM28XX_R30_HSCALELOW:
1564 case EM28XX_R32_VSCALELOW:
1565 return 2;
1566 default:
1567 return 1;
1568 }
1569}
1570
1571static int vidioc_g_chip_ident(struct file *file, void *priv,
1572 struct v4l2_dbg_chip_ident *chip)
1573{
1574 struct em28xx_fh *fh = priv;
1575 struct em28xx *dev = fh->dev;
1576
1577 chip->ident = V4L2_IDENT_NONE;
1578 chip->revision = 0;
1579
1580 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1581
1582 return 0;
1583}
1584
1585
1586static int vidioc_g_register(struct file *file, void *priv,
1587 struct v4l2_dbg_register *reg)
1588{
1589 struct em28xx_fh *fh = priv;
1590 struct em28xx *dev = fh->dev;
1591 int ret;
1592
1593 switch (reg->match.type) {
1594 case V4L2_CHIP_MATCH_AC97:
1595 mutex_lock(&dev->lock);
1596 ret = em28xx_read_ac97(dev, reg->reg);
1597 mutex_unlock(&dev->lock);
1598 if (ret < 0)
1599 return ret;
1600
1601 reg->val = ret;
1602 reg->size = 1;
1603 return 0;
1604 case V4L2_CHIP_MATCH_I2C_DRIVER:
1605 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1606 return 0;
1607 case V4L2_CHIP_MATCH_I2C_ADDR:
1608 /* TODO: is this correct? */
1609 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1610 return 0;
1611 default:
1612 if (!v4l2_chip_match_host(®->match))
1613 return -EINVAL;
1614 }
1615
1616 /* Match host */
1617 reg->size = em28xx_reg_len(reg->reg);
1618 if (reg->size == 1) {
1619 mutex_lock(&dev->lock);
1620 ret = em28xx_read_reg(dev, reg->reg);
1621 mutex_unlock(&dev->lock);
1622
1623 if (ret < 0)
1624 return ret;
1625
1626 reg->val = ret;
1627 } else {
1628 __le16 val = 0;
1629 mutex_lock(&dev->lock);
1630 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1631 reg->reg, (char *)&val, 2);
1632 mutex_unlock(&dev->lock);
1633 if (ret < 0)
1634 return ret;
1635
1636 reg->val = le16_to_cpu(val);
1637 }
1638
1639 return 0;
1640}
1641
1642static int vidioc_s_register(struct file *file, void *priv,
1643 struct v4l2_dbg_register *reg)
1644{
1645 struct em28xx_fh *fh = priv;
1646 struct em28xx *dev = fh->dev;
1647 __le16 buf;
1648 int rc;
1649
1650 switch (reg->match.type) {
1651 case V4L2_CHIP_MATCH_AC97:
1652 mutex_lock(&dev->lock);
1653 rc = em28xx_write_ac97(dev, reg->reg, reg->val);
1654 mutex_unlock(&dev->lock);
1655
1656 return rc;
1657 case V4L2_CHIP_MATCH_I2C_DRIVER:
1658 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1659 return 0;
1660 case V4L2_CHIP_MATCH_I2C_ADDR:
1661 /* TODO: is this correct? */
1662 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1663 return 0;
1664 default:
1665 if (!v4l2_chip_match_host(®->match))
1666 return -EINVAL;
1667 }
1668
1669 /* Match host */
1670 buf = cpu_to_le16(reg->val);
1671
1672 mutex_lock(&dev->lock);
1673 rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
1674 em28xx_reg_len(reg->reg));
1675 mutex_unlock(&dev->lock);
1676
1677 return rc;
1678}
1679#endif
1680
1681
1682static int vidioc_cropcap(struct file *file, void *priv,
1683 struct v4l2_cropcap *cc)
1684{
1685 struct em28xx_fh *fh = priv;
1686 struct em28xx *dev = fh->dev;
1687
1688 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1689 return -EINVAL;
1690
1691 cc->bounds.left = 0;
1692 cc->bounds.top = 0;
1693 cc->bounds.width = dev->width;
1694 cc->bounds.height = dev->height;
1695 cc->defrect = cc->bounds;
1696 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1697 cc->pixelaspect.denominator = 59;
1698
1699 return 0;
1700}
1701
1702static int vidioc_streamon(struct file *file, void *priv,
1703 enum v4l2_buf_type type)
1704{
1705 struct em28xx_fh *fh = priv;
1706 struct em28xx *dev = fh->dev;
1707 int rc = -EINVAL;
1708
1709 rc = check_dev(dev);
1710 if (rc < 0)
1711 return rc;
1712
1713 if (unlikely(type != fh->type))
1714 return -EINVAL;
1715
1716 em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
1717 fh, type, fh->resources, dev->resources);
1718
1719 if (unlikely(!res_get(fh, get_ressource(fh))))
1720 return -EBUSY;
1721
1722 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1723 rc = videobuf_streamon(&fh->vb_vidq);
1724 else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
1725 rc = videobuf_streamon(&fh->vb_vbiq);
1726
1727 return rc;
1728}
1729
1730static int vidioc_streamoff(struct file *file, void *priv,
1731 enum v4l2_buf_type type)
1732{
1733 struct em28xx_fh *fh = priv;
1734 struct em28xx *dev = fh->dev;
1735 int rc;
1736
1737 rc = check_dev(dev);
1738 if (rc < 0)
1739 return rc;
1740
1741 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1742 fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
1743 return -EINVAL;
1744 if (type != fh->type)
1745 return -EINVAL;
1746
1747 em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
1748 fh, type, fh->resources, dev->resources);
1749
1750 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1751 videobuf_streamoff(&fh->vb_vidq);
1752 res_free(fh, EM28XX_RESOURCE_VIDEO);
1753 } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1754 videobuf_streamoff(&fh->vb_vbiq);
1755 res_free(fh, EM28XX_RESOURCE_VBI);
1756 }
1757
1758 return 0;
1759}
1760
1761static int vidioc_querycap(struct file *file, void *priv,
1762 struct v4l2_capability *cap)
1763{
1764 struct em28xx_fh *fh = priv;
1765 struct em28xx *dev = fh->dev;
1766
1767 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1768 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1769 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1770
1771 cap->version = EM28XX_VERSION_CODE;
1772
1773 cap->capabilities =
1774 V4L2_CAP_SLICED_VBI_CAPTURE |
1775 V4L2_CAP_VIDEO_CAPTURE |
1776 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1777
1778 if (dev->vbi_dev)
1779 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1780
1781 if (dev->audio_mode.has_audio)
1782 cap->capabilities |= V4L2_CAP_AUDIO;
1783
1784 if (dev->tuner_type != TUNER_ABSENT)
1785 cap->capabilities |= V4L2_CAP_TUNER;
1786
1787 return 0;
1788}
1789
1790static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1791 struct v4l2_fmtdesc *f)
1792{
1793 if (unlikely(f->index >= ARRAY_SIZE(format)))
1794 return -EINVAL;
1795
1796 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1797 f->pixelformat = format[f->index].fourcc;
1798
1799 return 0;
1800}
1801
1802/* Sliced VBI ioctls */
1803static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1804 struct v4l2_format *f)
1805{
1806 struct em28xx_fh *fh = priv;
1807 struct em28xx *dev = fh->dev;
1808 int rc;
1809
1810 rc = check_dev(dev);
1811 if (rc < 0)
1812 return rc;
1813
1814 mutex_lock(&dev->lock);
1815
1816 f->fmt.sliced.service_set = 0;
1817 v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1818
1819 if (f->fmt.sliced.service_set == 0)
1820 rc = -EINVAL;
1821
1822 mutex_unlock(&dev->lock);
1823
1824 return rc;
1825}
1826
1827static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1828 struct v4l2_format *f)
1829{
1830 struct em28xx_fh *fh = priv;
1831 struct em28xx *dev = fh->dev;
1832 int rc;
1833
1834 rc = check_dev(dev);
1835 if (rc < 0)
1836 return rc;
1837
1838 mutex_lock(&dev->lock);
1839 v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
1840 mutex_unlock(&dev->lock);
1841
1842 if (f->fmt.sliced.service_set == 0)
1843 return -EINVAL;
1844
1845 return 0;
1846}
1847
1848/* RAW VBI ioctls */
1849
1850static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1851 struct v4l2_format *format)
1852{
1853 struct em28xx_fh *fh = priv;
1854 struct em28xx *dev = fh->dev;
1855
1856 format->fmt.vbi.samples_per_line = dev->vbi_width;
1857 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1858 format->fmt.vbi.offset = 0;
1859 format->fmt.vbi.flags = 0;
1860 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1861 format->fmt.vbi.count[0] = dev->vbi_height;
1862 format->fmt.vbi.count[1] = dev->vbi_height;
1863
1864 /* Varies by video standard (NTSC, PAL, etc.) */
1865 if (dev->norm & V4L2_STD_525_60) {
1866 /* NTSC */
1867 format->fmt.vbi.start[0] = 10;
1868 format->fmt.vbi.start[1] = 273;
1869 } else if (dev->norm & V4L2_STD_625_50) {
1870 /* PAL */
1871 format->fmt.vbi.start[0] = 6;
1872 format->fmt.vbi.start[1] = 318;
1873 }
1874
1875 return 0;
1876}
1877
1878static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1879 struct v4l2_format *format)
1880{
1881 struct em28xx_fh *fh = priv;
1882 struct em28xx *dev = fh->dev;
1883
1884 format->fmt.vbi.samples_per_line = dev->vbi_width;
1885 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1886 format->fmt.vbi.offset = 0;
1887 format->fmt.vbi.flags = 0;
1888 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1889 format->fmt.vbi.count[0] = dev->vbi_height;
1890 format->fmt.vbi.count[1] = dev->vbi_height;
1891
1892 /* Varies by video standard (NTSC, PAL, etc.) */
1893 if (dev->norm & V4L2_STD_525_60) {
1894 /* NTSC */
1895 format->fmt.vbi.start[0] = 10;
1896 format->fmt.vbi.start[1] = 273;
1897 } else if (dev->norm & V4L2_STD_625_50) {
1898 /* PAL */
1899 format->fmt.vbi.start[0] = 6;
1900 format->fmt.vbi.start[1] = 318;
1901 }
1902
1903 return 0;
1904}
1905
1906static int vidioc_reqbufs(struct file *file, void *priv,
1907 struct v4l2_requestbuffers *rb)
1908{
1909 struct em28xx_fh *fh = priv;
1910 struct em28xx *dev = fh->dev;
1911 int rc;
1912
1913 rc = check_dev(dev);
1914 if (rc < 0)
1915 return rc;
1916
1917 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1918 return videobuf_reqbufs(&fh->vb_vidq, rb);
1919 else
1920 return videobuf_reqbufs(&fh->vb_vbiq, rb);
1921}
1922
1923static int vidioc_querybuf(struct file *file, void *priv,
1924 struct v4l2_buffer *b)
1925{
1926 struct em28xx_fh *fh = priv;
1927 struct em28xx *dev = fh->dev;
1928 int rc;
1929
1930 rc = check_dev(dev);
1931 if (rc < 0)
1932 return rc;
1933
1934 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1935 return videobuf_querybuf(&fh->vb_vidq, b);
1936 else {
1937 /* FIXME: I'm not sure yet whether this is a bug in zvbi or
1938 the videobuf framework, but we probably shouldn't be
1939 returning a buffer larger than that which was asked for.
1940 At a minimum, it causes a crash in zvbi since it does
1941 a memcpy based on the source buffer length */
1942 int result = videobuf_querybuf(&fh->vb_vbiq, b);
1943 b->length = dev->vbi_width * dev->vbi_height * 2;
1944
1945 return result;
1946 }
1947}
1948
1949static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1950{
1951 struct em28xx_fh *fh = priv;
1952 struct em28xx *dev = fh->dev;
1953 int rc;
1954
1955 rc = check_dev(dev);
1956 if (rc < 0)
1957 return rc;
1958
1959 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1960 return videobuf_qbuf(&fh->vb_vidq, b);
1961 else
1962 return videobuf_qbuf(&fh->vb_vbiq, b);
1963}
1964
1965static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1966{
1967 struct em28xx_fh *fh = priv;
1968 struct em28xx *dev = fh->dev;
1969 int rc;
1970
1971 rc = check_dev(dev);
1972 if (rc < 0)
1973 return rc;
1974
1975 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1976 return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
1977 O_NONBLOCK);
1978 else
1979 return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
1980 O_NONBLOCK);
1981}
1982
1983#ifdef CONFIG_VIDEO_V4L1_COMPAT
1984static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1985{
1986 struct em28xx_fh *fh = priv;
1987
1988 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1989 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1990 else
1991 return videobuf_cgmbuf(&fh->vb_vbiq, mbuf, 8);
1992}
1993#endif
1994
1995
1996/* ----------------------------------------------------------- */
1997/* RADIO ESPECIFIC IOCTLS */
1998/* ----------------------------------------------------------- */
1999
2000static int radio_querycap(struct file *file, void *priv,
2001 struct v4l2_capability *cap)
2002{
2003 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2004
2005 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
2006 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
2007 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
2008
2009 cap->version = EM28XX_VERSION_CODE;
2010 cap->capabilities = V4L2_CAP_TUNER;
2011 return 0;
2012}
2013
2014static int radio_g_tuner(struct file *file, void *priv,
2015 struct v4l2_tuner *t)
2016{
2017 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2018
2019 if (unlikely(t->index > 0))
2020 return -EINVAL;
2021
2022 strcpy(t->name, "Radio");
2023 t->type = V4L2_TUNER_RADIO;
2024
2025 mutex_lock(&dev->lock);
2026 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
2027 mutex_unlock(&dev->lock);
2028
2029 return 0;
2030}
2031
2032static int radio_enum_input(struct file *file, void *priv,
2033 struct v4l2_input *i)
2034{
2035 if (i->index != 0)
2036 return -EINVAL;
2037 strcpy(i->name, "Radio");
2038 i->type = V4L2_INPUT_TYPE_TUNER;
2039
2040 return 0;
2041}
2042
2043static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
2044{
2045 if (unlikely(a->index))
2046 return -EINVAL;
2047
2048 strcpy(a->name, "Radio");
2049 return 0;
2050}
2051
2052static int radio_s_tuner(struct file *file, void *priv,
2053 struct v4l2_tuner *t)
2054{
2055 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
2056
2057 if (0 != t->index)
2058 return -EINVAL;
2059
2060 mutex_lock(&dev->lock);
2061 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
2062 mutex_unlock(&dev->lock);
2063
2064 return 0;
2065}
2066
2067static int radio_s_audio(struct file *file, void *fh,
2068 struct v4l2_audio *a)
2069{
2070 return 0;
2071}
2072
2073static int radio_s_input(struct file *file, void *fh, unsigned int i)
2074{
2075 return 0;
2076}
2077
2078static int radio_queryctrl(struct file *file, void *priv,
2079 struct v4l2_queryctrl *qc)
2080{
2081 int i;
2082
2083 if (qc->id < V4L2_CID_BASE ||
2084 qc->id >= V4L2_CID_LASTP1)
2085 return -EINVAL;
2086
2087 for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
2088 if (qc->id && qc->id == ac97_qctrl[i].id) {
2089 memcp…Large files files are truncated, but you can click here to view the full file