2 file operation functions
3 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
4 Copyright (C) 2004 Chris Kennedy <c@groovy.org>
5 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "ivtv-driver.h"
23 #include "ivtv-fileops.h"
25 #include "ivtv-queue.h"
26 #include "ivtv-udma.h"
29 #include "ivtv-mailbox.h"
30 #include "ivtv-audio.h"
31 #include "ivtv-streams.h"
33 #include "ivtv-controls.h"
34 #include "ivtv-ioctl.h"
35 #include "ivtv-cards.h"
36 #include <media/saa7115.h>
38 /* This function tries to claim the stream for a specific file descriptor.
39 If no one else is using this stream then the stream is claimed and
40 associated VBI streams are also automatically claimed.
41 Possible error returns: -EBUSY if someone else has claimed
42 the stream or 0 on success. */
43 int ivtv_claim_stream(struct ivtv_open_id
*id
, int type
)
45 struct ivtv
*itv
= id
->itv
;
46 struct ivtv_stream
*s
= &itv
->streams
[type
];
47 struct ivtv_stream
*s_vbi
;
50 if (test_and_set_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
51 /* someone already claimed this stream */
52 if (s
->id
== id
->open_id
) {
53 /* yes, this file descriptor did. So that's OK. */
56 if (s
->id
== -1 && (type
== IVTV_DEC_STREAM_TYPE_VBI
||
57 type
== IVTV_ENC_STREAM_TYPE_VBI
)) {
58 /* VBI is handled already internally, now also assign
59 the file descriptor to this stream for external
60 reading of the stream. */
62 IVTV_DEBUG_INFO("Start Read VBI\n");
65 /* someone else is using this stream already */
66 IVTV_DEBUG_INFO("Stream %d is busy\n", type
);
70 if (type
== IVTV_DEC_STREAM_TYPE_VBI
) {
71 /* Enable reinsertion interrupt */
72 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
75 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
76 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
77 (provided VBI insertion is on and sliced VBI is selected), for all
78 other streams we're done */
79 if (type
== IVTV_DEC_STREAM_TYPE_MPG
) {
80 vbi_type
= IVTV_DEC_STREAM_TYPE_VBI
;
81 } else if (type
== IVTV_ENC_STREAM_TYPE_MPG
&&
82 itv
->vbi
.insert_mpeg
&& itv
->vbi
.sliced_in
->service_set
) {
83 vbi_type
= IVTV_ENC_STREAM_TYPE_VBI
;
87 s_vbi
= &itv
->streams
[vbi_type
];
89 if (!test_and_set_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
)) {
90 /* Enable reinsertion interrupt */
91 if (vbi_type
== IVTV_DEC_STREAM_TYPE_VBI
)
92 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
94 /* mark that it is used internally */
95 set_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
);
99 /* This function releases a previously claimed stream. It will take into
100 account associated VBI streams. */
101 void ivtv_release_stream(struct ivtv_stream
*s
)
103 struct ivtv
*itv
= s
->itv
;
104 struct ivtv_stream
*s_vbi
;
107 if ((s
->type
== IVTV_DEC_STREAM_TYPE_VBI
|| s
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
108 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
109 /* this stream is still in use internally */
112 if (!test_and_clear_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
113 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s
->name
);
117 ivtv_flush_queues(s
);
119 /* disable reinsertion interrupt */
120 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
121 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
123 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI,
124 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI,
125 for all other streams we're done */
126 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
127 s_vbi
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VBI
];
128 else if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
129 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
133 /* clear internal use flag */
134 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
)) {
135 /* was already cleared */
138 if (s_vbi
->id
!= -1) {
139 /* VBI stream still claimed by a file descriptor */
142 /* disable reinsertion interrupt */
143 if (s_vbi
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
144 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
145 clear_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
);
146 ivtv_flush_queues(s_vbi
);
149 static void ivtv_dualwatch(struct ivtv
*itv
)
151 struct v4l2_tuner vt
;
154 const u16 stereo_mask
= 0x0300;
155 const u16 dual
= 0x0200;
157 new_stereo_mode
= itv
->params
.audio_properties
& stereo_mask
;
158 memset(&vt
, 0, sizeof(vt
));
159 ivtv_call_i2c_clients(itv
, VIDIOC_G_TUNER
, &vt
);
160 if (vt
.audmode
== V4L2_TUNER_MODE_LANG1_LANG2
&& (vt
.rxsubchans
& V4L2_TUNER_SUB_LANG2
))
161 new_stereo_mode
= dual
;
163 if (new_stereo_mode
== itv
->dualwatch_stereo_mode
)
166 new_bitmap
= new_stereo_mode
| (itv
->params
.audio_properties
& ~stereo_mask
);
168 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. new audio_bitmask=0x%ux\n",
169 itv
->dualwatch_stereo_mode
, new_stereo_mode
, new_bitmap
);
171 if (ivtv_vapi(itv
, CX2341X_ENC_SET_AUDIO_PROPERTIES
, 1, new_bitmap
) == 0) {
172 itv
->dualwatch_stereo_mode
= new_stereo_mode
;
175 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
178 static void ivtv_update_pgm_info(struct ivtv
*itv
)
180 u32 wr_idx
= (read_enc(itv
->pgm_info_offset
) - itv
->pgm_info_offset
- 4) / 24;
184 if (wr_idx
>= itv
->pgm_info_num
) {
185 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx
, itv
->pgm_info_num
);
188 cnt
= (wr_idx
+ itv
->pgm_info_num
- itv
->pgm_info_write_idx
) % itv
->pgm_info_num
;
190 int idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
191 struct v4l2_enc_idx_entry
*e
= itv
->pgm_info
+ idx
;
192 u32 addr
= itv
->pgm_info_offset
+ 4 + idx
* 24;
193 const int mapping
[] = { V4L2_ENC_IDX_FRAME_P
, V4L2_ENC_IDX_FRAME_I
, V4L2_ENC_IDX_FRAME_B
, 0 };
195 e
->offset
= read_enc(addr
+ 4) + ((u64
)read_enc(addr
+ 8) << 32);
196 if (e
->offset
> itv
->mpg_data_received
) {
199 e
->offset
+= itv
->vbi_data_inserted
;
200 e
->length
= read_enc(addr
);
201 e
->pts
= read_enc(addr
+ 16) + ((u64
)(read_enc(addr
+ 20) & 1) << 32);
202 e
->flags
= mapping
[read_enc(addr
+ 12) & 3];
205 itv
->pgm_info_write_idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
208 static struct ivtv_buffer
*ivtv_get_buffer(struct ivtv_stream
*s
, int non_block
, int *err
)
210 struct ivtv
*itv
= s
->itv
;
211 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
212 struct ivtv_buffer
*buf
;
217 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
) {
218 /* Process pending program info updates and pending VBI data */
219 ivtv_update_pgm_info(itv
);
221 if (jiffies
- itv
->dualwatch_jiffies
> HZ
) {
222 itv
->dualwatch_jiffies
= jiffies
;
226 if (test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
227 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
228 while ((buf
= ivtv_dequeue(s_vbi
, &s_vbi
->q_full
))) {
229 /* byteswap and process VBI data */
230 ivtv_process_vbi_data(itv
, buf
, s_vbi
->dma_pts
, s_vbi
->type
);
231 ivtv_enqueue(s_vbi
, buf
, &s_vbi
->q_free
);
234 buf
= &itv
->vbi
.sliced_mpeg_buf
;
235 if (buf
->readpos
!= buf
->bytesused
) {
240 /* do we have leftover data? */
241 buf
= ivtv_dequeue(s
, &s
->q_io
);
245 /* do we have new data? */
246 buf
= ivtv_dequeue(s
, &s
->q_full
);
248 if (!test_and_clear_bit(IVTV_F_B_NEED_BUF_SWAP
, &buf
->b_flags
))
250 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
251 /* byteswap MPG data */
253 else if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
) {
254 /* byteswap and process VBI data */
255 ivtv_process_vbi_data(itv
, buf
, s
->dma_pts
, s
->type
);
259 /* return if file was opened with O_NONBLOCK */
265 /* return if end of stream */
266 if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
267 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
268 IVTV_DEBUG_INFO("EOS %s\n", s
->name
);
272 /* wait for more data to arrive */
273 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
274 /* New buffers might have become available before we were added to the waitqueue */
275 if (!s
->q_full
.buffers
)
277 finish_wait(&s
->waitq
, &wait
);
278 if (signal_pending(current
)) {
279 /* return if a signal was received */
280 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
287 static void ivtv_setup_sliced_vbi_buf(struct ivtv
*itv
)
289 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
291 itv
->vbi
.sliced_mpeg_buf
.buf
= itv
->vbi
.sliced_mpeg_data
[idx
];
292 itv
->vbi
.sliced_mpeg_buf
.bytesused
= itv
->vbi
.sliced_mpeg_size
[idx
];
293 itv
->vbi
.sliced_mpeg_buf
.readpos
= 0;
296 static size_t ivtv_copy_buf_to_user(struct ivtv_stream
*s
, struct ivtv_buffer
*buf
,
297 char __user
*ubuf
, size_t ucount
)
299 struct ivtv
*itv
= s
->itv
;
300 size_t len
= buf
->bytesused
- buf
->readpos
;
302 if (len
> ucount
) len
= ucount
;
303 if (itv
->vbi
.insert_mpeg
&& s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
304 itv
->vbi
.sliced_in
->service_set
&& buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
305 const char *start
= buf
->buf
+ buf
->readpos
;
306 const char *p
= start
+ 1;
308 u8 ch
= itv
->search_pack_header
? 0xba : 0xe0;
311 while (start
+ len
> p
&& (q
= memchr(p
, 0, start
+ len
- p
))) {
313 if ((char *)q
+ 15 >= buf
->buf
+ buf
->bytesused
||
314 q
[1] != 0 || q
[2] != 1 || q
[3] != ch
) {
317 if (!itv
->search_pack_header
) {
318 if ((q
[6] & 0xc0) != 0x80)
320 if (((q
[7] & 0xc0) == 0x80 && (q
[9] & 0xf0) == 0x20) ||
321 ((q
[7] & 0xc0) == 0xc0 && (q
[9] & 0xf0) == 0x30)) {
323 itv
->search_pack_header
= 1;
328 stuffing
= q
[13] & 7;
329 /* all stuffing bytes must be 0xff */
330 for (i
= 0; i
< stuffing
; i
++)
331 if (q
[14 + i
] != 0xff)
333 if (i
== stuffing
&& (q
[4] & 0xc4) == 0x44 && (q
[12] & 3) == 3 &&
334 q
[14 + stuffing
] == 0 && q
[15 + stuffing
] == 0 &&
335 q
[16 + stuffing
] == 1) {
336 itv
->search_pack_header
= 0;
337 len
= (char *)q
- start
;
338 ivtv_setup_sliced_vbi_buf(itv
);
343 if (copy_to_user(ubuf
, (u8
*)buf
->buf
+ buf
->readpos
, len
)) {
344 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len
, s
->name
);
347 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
348 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
349 buf == &itv->vbi.sliced_mpeg_buf); */
351 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&& buf
!= &itv
->vbi
.sliced_mpeg_buf
)
352 itv
->mpg_data_received
+= len
;
356 static ssize_t
ivtv_read(struct ivtv_stream
*s
, char __user
*ubuf
, size_t tot_count
, int non_block
)
358 struct ivtv
*itv
= s
->itv
;
359 size_t tot_written
= 0;
360 int single_frame
= 0;
362 if (atomic_read(&itv
->capturing
) == 0 && s
->id
== -1) {
363 /* shouldn't happen */
364 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s
->name
);
368 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
369 arrive one-by-one, so make sure we never output more than one VBI frame at a time */
370 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
371 (s
->type
== IVTV_ENC_STREAM_TYPE_VBI
&& itv
->vbi
.sliced_in
->service_set
))
375 struct ivtv_buffer
*buf
;
378 buf
= ivtv_get_buffer(s
, non_block
, &rc
);
379 if (buf
== NULL
&& rc
== -EAGAIN
&& tot_written
)
383 rc
= ivtv_copy_buf_to_user(s
, buf
, ubuf
+ tot_written
, tot_count
- tot_written
);
384 if (buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
385 ivtv_enqueue(s
, buf
, (buf
->readpos
== buf
->bytesused
) ? &s
->q_free
: &s
->q_io
);
387 else if (buf
->readpos
== buf
->bytesused
) {
388 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
389 itv
->vbi
.sliced_mpeg_size
[idx
] = 0;
390 itv
->vbi
.inserted_frame
++;
391 itv
->vbi_data_inserted
+= buf
->bytesused
;
397 if (tot_written
== tot_count
|| single_frame
)
403 static ssize_t
ivtv_read_pos(struct ivtv_stream
*s
, char __user
*ubuf
, size_t count
,
404 loff_t
*pos
, int non_block
)
406 ssize_t rc
= count
? ivtv_read(s
, ubuf
, count
, non_block
) : 0;
407 struct ivtv
*itv
= s
->itv
;
409 IVTV_DEBUG_INFO("read %zd from %s, got %zd\n", count
, s
->name
, rc
);
415 int ivtv_start_capture(struct ivtv_open_id
*id
)
417 struct ivtv
*itv
= id
->itv
;
418 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
419 struct ivtv_stream
*s_vbi
;
421 if (s
->type
== IVTV_ENC_STREAM_TYPE_RAD
||
422 s
->type
== IVTV_DEC_STREAM_TYPE_MPG
||
423 s
->type
== IVTV_DEC_STREAM_TYPE_YUV
||
424 s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
425 /* you cannot read from these stream types. */
429 /* Try to claim this stream. */
430 if (ivtv_claim_stream(id
, s
->type
))
433 /* This stream does not need to start capturing */
434 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
) {
435 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
439 /* If capture is already in progress, then we also have to
441 if (test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
) || test_and_set_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
442 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
446 /* Start VBI capture if required */
447 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
448 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
449 test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
450 !test_and_set_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
451 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
452 automatically when the MPG stream is claimed.
453 We only need to start the VBI capturing. */
454 if (ivtv_start_v4l2_encode_stream(s_vbi
)) {
455 IVTV_DEBUG_WARN("VBI capture start failed\n");
457 /* Failure, clean up and return an error */
458 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
459 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
460 /* also releases the associated VBI stream */
461 ivtv_release_stream(s
);
464 IVTV_DEBUG_INFO("VBI insertion started\n");
467 /* Tell the card to start capturing */
468 if (!ivtv_start_v4l2_encode_stream(s
)) {
470 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
471 /* Resume a possibly paused encoder */
472 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED
, &itv
->i_flags
))
473 ivtv_vapi(itv
, CX2341X_ENC_PAUSE_ENCODER
, 1, 1);
477 /* failure, clean up */
478 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s
->name
);
480 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
481 automatically when the MPG stream is released.
482 We only need to stop the VBI capturing. */
483 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
484 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
485 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
486 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
488 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
489 ivtv_release_stream(s
);
493 ssize_t
ivtv_v4l2_read(struct file
* filp
, char __user
*buf
, size_t count
, loff_t
* pos
)
495 struct ivtv_open_id
*id
= filp
->private_data
;
496 struct ivtv
*itv
= id
->itv
;
497 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
500 IVTV_DEBUG_IOCTL("read %zd bytes from %s\n", count
, s
->name
);
502 rc
= ivtv_start_capture(id
);
505 return ivtv_read_pos(s
, buf
, count
, pos
, filp
->f_flags
& O_NONBLOCK
);
508 int ivtv_start_decoding(struct ivtv_open_id
*id
, int speed
)
510 struct ivtv
*itv
= id
->itv
;
511 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
513 if (atomic_read(&itv
->decoding
) == 0) {
514 if (ivtv_claim_stream(id
, s
->type
)) {
515 /* someone else is using this stream already */
516 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
519 ivtv_start_v4l2_decode_stream(s
, 0);
521 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
522 return ivtv_set_speed(itv
, speed
);
526 ssize_t
ivtv_v4l2_write(struct file
*filp
, const char __user
*user_buf
, size_t count
, loff_t
*pos
)
528 struct ivtv_open_id
*id
= filp
->private_data
;
529 struct ivtv
*itv
= id
->itv
;
530 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
531 struct ivtv_buffer
*buf
;
533 int bytes_written
= 0;
538 IVTV_DEBUG_IOCTL("write %zd bytes to %s\n", count
, s
->name
);
540 if (s
->type
!= IVTV_DEC_STREAM_TYPE_MPG
&&
541 s
->type
!= IVTV_DEC_STREAM_TYPE_YUV
&&
542 s
->type
!= IVTV_DEC_STREAM_TYPE_VOUT
)
543 /* not decoder streams */
546 /* Try to claim this stream */
547 if (ivtv_claim_stream(id
, s
->type
))
550 /* This stream does not need to start any decoding */
551 if (s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
552 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
553 return ivtv_write_vbi(itv
, user_buf
, count
);
556 mode
= s
->type
== IVTV_DEC_STREAM_TYPE_MPG
? OUT_MPG
: OUT_YUV
;
558 if (ivtv_set_output_mode(itv
, mode
) != mode
) {
559 ivtv_release_stream(s
);
563 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
568 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_io
)))
569 ivtv_enqueue(s
, buf
, &q
);
570 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_free
))) {
571 ivtv_enqueue(s
, buf
, &q
);
575 if (filp
->f_flags
& O_NONBLOCK
)
577 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
578 /* New buffers might have become free before we were added to the waitqueue */
579 if (!s
->q_free
.buffers
)
581 finish_wait(&s
->waitq
, &wait
);
582 if (signal_pending(current
)) {
583 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
588 /* copy user data into buffers */
589 while ((buf
= ivtv_dequeue(s
, &q
))) {
590 /* Make sure we really got all the user data */
591 rc
= ivtv_buf_copy_from_user(s
, buf
, user_buf
, count
);
594 ivtv_queue_move(s
, &q
, NULL
, &s
->q_free
, 0);
601 if (buf
->bytesused
!= s
->buf_size
) {
602 /* incomplete, leave in q_io for next time */
603 ivtv_enqueue(s
, buf
, &s
->q_io
);
606 /* Byteswap MPEG buffer */
607 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
609 ivtv_enqueue(s
, buf
, &s
->q_full
);
612 /* Start decoder (returns 0 if already started) */
613 rc
= ivtv_start_decoding(id
, itv
->speed
);
615 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s
->name
);
617 /* failure, clean up */
618 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
619 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
622 if (test_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
)) {
623 if (s
->q_full
.length
>= itv
->dma_data_req_size
) {
626 prepare_to_wait(&itv
->dma_waitq
, &wait
, TASK_INTERRUPTIBLE
);
627 while (!(got_sig
= signal_pending(current
)) &&
628 test_bit(IVTV_F_S_DMA_PENDING
, &s
->s_flags
)) {
631 finish_wait(&itv
->dma_waitq
, &wait
);
633 IVTV_DEBUG_INFO("User interrupted %s\n", s
->name
);
637 clear_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
);
638 ivtv_queue_move(s
, &s
->q_full
, NULL
, &s
->q_predma
, itv
->dma_data_req_size
);
639 ivtv_dma_stream_dec_prepare(s
, itv
->dma_data_req_offset
+ IVTV_DECODER_OFFSET
, 1);
642 /* more user data is available, wait until buffers become free
643 to transfer the rest. */
644 if (count
&& !(filp
->f_flags
& O_NONBLOCK
))
646 IVTV_DEBUG_INFO("Wrote %d bytes to %s (%d)\n", bytes_written
, s
->name
, s
->q_full
.bytesused
);
647 return bytes_written
;
650 unsigned int ivtv_v4l2_dec_poll(struct file
*filp
, poll_table
*wait
)
652 struct ivtv_open_id
*id
= filp
->private_data
;
653 struct ivtv
*itv
= id
->itv
;
654 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
657 /* add stream's waitq to the poll list */
658 poll_wait(filp
, &s
->waitq
, wait
);
660 set_bit(IVTV_F_I_EV_VSYNC_ENABLED
, &itv
->i_flags
);
661 if (test_bit(IVTV_F_I_EV_VSYNC
, &itv
->i_flags
) ||
662 test_bit(IVTV_F_I_EV_DEC_STOPPED
, &itv
->i_flags
))
665 /* Allow write if buffers are available for writing */
666 if (s
->q_free
.buffers
)
667 res
|= POLLOUT
| POLLWRNORM
;
671 unsigned int ivtv_v4l2_enc_poll(struct file
*filp
, poll_table
* wait
)
673 struct ivtv_open_id
*id
= filp
->private_data
;
674 struct ivtv
*itv
= id
->itv
;
675 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
676 int eof
= test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
678 /* Start a capture if there is none */
679 if (!eof
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
680 int rc
= ivtv_start_capture(id
);
683 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
689 /* add stream's waitq to the poll list */
690 poll_wait(filp
, &s
->waitq
, wait
);
692 if (eof
|| s
->q_full
.length
)
693 return POLLIN
| POLLRDNORM
;
697 void ivtv_stop_capture(struct ivtv_open_id
*id
, int gop_end
)
699 struct ivtv
*itv
= id
->itv
;
700 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
702 IVTV_DEBUG_IOCTL("close() of %s\n", s
->name
);
704 /* 'Unclaim' this stream */
707 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
708 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
710 IVTV_DEBUG_INFO("close stopping capture\n");
711 /* Special case: a running VBI capture for VBI insertion
712 in the mpeg stream. Need to stop that too. */
713 if (id
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
714 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
) &&
715 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
716 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
717 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
719 if ((id
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
720 id
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
721 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
722 /* Also used internally, don't stop capturing */
726 ivtv_stop_v4l2_encode_stream(s
, gop_end
);
729 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
730 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
732 ivtv_release_stream(s
);
735 static void ivtv_stop_decoding(struct ivtv_open_id
*id
, int flags
, u64 pts
)
737 struct ivtv
*itv
= id
->itv
;
738 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
740 IVTV_DEBUG_IOCTL("close() of %s\n", s
->name
);
743 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
744 IVTV_DEBUG_INFO("close stopping decode\n");
746 ivtv_stop_v4l2_decode_stream(s
, flags
, pts
);
748 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
749 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
750 if (id
->type
== IVTV_DEC_STREAM_TYPE_YUV
&& test_bit(IVTV_F_I_DECODING_YUV
, &itv
->i_flags
)) {
751 /* Restore registers we've changed & clean up any mess we've made */
754 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&& itv
->output_mode
== OUT_YUV
)
755 itv
->output_mode
= OUT_NONE
;
756 else if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&& itv
->output_mode
== OUT_UDMA_YUV
)
757 itv
->output_mode
= OUT_NONE
;
758 else if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
&& itv
->output_mode
== OUT_MPG
)
759 itv
->output_mode
= OUT_NONE
;
762 ivtv_release_stream(s
);
765 int ivtv_v4l2_close(struct inode
*inode
, struct file
*filp
)
767 struct ivtv_open_id
*id
= filp
->private_data
;
768 struct ivtv
*itv
= id
->itv
;
769 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
771 IVTV_DEBUG_IOCTL("close() of %s\n", s
->name
);
773 v4l2_prio_close(&itv
->prio
, &id
->prio
);
775 /* Easy case first: this stream was never claimed by us */
776 if (s
->id
!= id
->open_id
) {
781 /* 'Unclaim' this stream */
784 if (id
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
785 /* Closing radio device, return to TV mode */
787 /* Mark that the radio is no longer in use */
788 clear_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
789 /* Switch tuner to TV */
790 ivtv_call_i2c_clients(itv
, VIDIOC_S_STD
, &itv
->std
);
791 /* Select correct audio input (i.e. TV tuner or Line in) */
792 ivtv_audio_set_io(itv
);
793 if (itv
->hw_flags
& IVTV_HW_SAA711X
)
795 struct v4l2_crystal_freq crystal_freq
;
796 crystal_freq
.freq
= SAA7115_FREQ_32_11_MHZ
;
797 crystal_freq
.flags
= 0;
798 ivtv_saa7115(itv
, VIDIOC_INT_S_CRYSTAL_FREQ
, &crystal_freq
);
800 /* Done! Unmute and continue. */
802 ivtv_release_stream(s
);
803 } else if (s
->type
>= IVTV_DEC_STREAM_TYPE_MPG
) {
804 ivtv_stop_decoding(id
, VIDEO_CMD_STOP_TO_BLACK
| VIDEO_CMD_STOP_IMMEDIATELY
, 0);
806 ivtv_stop_capture(id
, 0);
812 int ivtv_v4l2_open(struct inode
*inode
, struct file
*filp
)
815 struct ivtv_open_id
*item
;
816 struct ivtv
*itv
= NULL
;
817 struct ivtv_stream
*s
= NULL
;
818 int minor
= iminor(inode
);
820 /* Find which card this open was on */
821 spin_lock(&ivtv_cards_lock
);
822 for (x
= 0; itv
== NULL
&& x
< ivtv_cards_active
; x
++) {
823 /* find out which stream this open was on */
824 for (y
= 0; y
< IVTV_MAX_STREAMS
; y
++) {
825 s
= &ivtv_cards
[x
]->streams
[y
];
826 if (s
->v4l2dev
&& s
->v4l2dev
->minor
== minor
) {
832 spin_unlock(&ivtv_cards_lock
);
835 /* Couldn't find a device registered
836 on that minor, shouldn't happen! */
837 printk(KERN_WARNING
"ivtv: no ivtv device found on minor %d\n", minor
);
841 if (y
== IVTV_DEC_STREAM_TYPE_MPG
&&
842 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_YUV
].s_flags
))
845 if (y
== IVTV_DEC_STREAM_TYPE_YUV
&&
846 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_MPG
].s_flags
))
849 if (y
== IVTV_DEC_STREAM_TYPE_YUV
) {
850 if (read_reg(0x82c) == 0) {
851 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
852 /* return -ENODEV; */
854 ivtv_udma_alloc(itv
);
857 /* Allocate memory */
858 item
= kmalloc(sizeof(struct ivtv_open_id
), GFP_KERNEL
);
860 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
865 v4l2_prio_open(&itv
->prio
, &item
->prio
);
867 item
->open_id
= itv
->open_id
++;
868 filp
->private_data
= item
;
870 if (item
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
871 /* Try to claim this stream */
872 if (ivtv_claim_stream(item
, item
->type
)) {
873 /* No, it's already in use */
878 /* We have the radio */
880 /* Switch tuner to radio */
881 ivtv_call_i2c_clients(itv
, AUDC_SET_RADIO
, NULL
);
882 /* Mark that the radio is being used. */
883 set_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
884 /* Select the correct audio input (i.e. radio tuner) */
885 ivtv_audio_set_io(itv
);
886 if (itv
->hw_flags
& IVTV_HW_SAA711X
)
888 struct v4l2_crystal_freq crystal_freq
;
889 crystal_freq
.freq
= SAA7115_FREQ_32_11_MHZ
;
890 crystal_freq
.flags
= SAA7115_FREQ_FL_APLL
;
891 ivtv_saa7115(itv
, VIDIOC_INT_S_CRYSTAL_FREQ
, &crystal_freq
);
893 /* Done! Unmute and continue. */
897 /* YUV or MPG Decoding Mode? */
898 if (y
== IVTV_DEC_STREAM_TYPE_MPG
)
899 clear_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
900 else if (y
== IVTV_DEC_STREAM_TYPE_YUV
)
902 set_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
908 void ivtv_mute(struct ivtv
*itv
)
910 struct v4l2_control ctrl
= { V4L2_CID_AUDIO_MUTE
, 1 };
912 /* Mute sound to avoid pop */
913 ivtv_control_ioctls(itv
, VIDIOC_S_CTRL
, &ctrl
);
915 if (atomic_read(&itv
->capturing
))
916 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 1);
918 IVTV_DEBUG_INFO("Mute\n");
921 void ivtv_unmute(struct ivtv
*itv
)
923 struct v4l2_control ctrl
= { V4L2_CID_AUDIO_MUTE
, 0 };
925 /* initialize or refresh input */
926 if (atomic_read(&itv
->capturing
) == 0)
927 ivtv_vapi(itv
, CX2341X_ENC_INITIALIZE_INPUT
, 0);
929 ivtv_sleep_timeout(HZ
/ 10, 0);
931 if (atomic_read(&itv
->capturing
)) {
932 ivtv_vapi(itv
, CX2341X_ENC_MISC
, 1, 12);
933 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 0);
937 ivtv_control_ioctls(itv
, VIDIOC_S_CTRL
, &ctrl
);
938 IVTV_DEBUG_INFO("Unmute\n");