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em28xx-video.c
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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 <[email protected]>
6  Markus Rechberger <[email protected]>
7  Mauro Carvalho Chehab <[email protected]>
8  Sascha Sommer <[email protected]>
9 
10  Some parts based on SN9C10x PC Camera Controllers GPL driver made
11  by Luca Risolia <[email protected]>
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 <[email protected]>, " \
47  "Markus Rechberger <[email protected]>, " \
48  "Mauro Carvalho Chehab <[email protected]>, " \
49  "Sascha Sommer <[email protected]>"
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 }
Generated on Thu Jan 10 2013 13:51:39 for Linux Kernel by   doxygen 1.8.2