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-routing.h"
31 #include "ivtv-streams.h"
33 #include "ivtv-ioctl.h"
34 #include "ivtv-cards.h"
35 #include <media/v4l2-event.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 static 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
&& !ivtv_raw_vbi(itv
)) {
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 u32 stereo_mask
= 0x0300;
155 const u32 dual
= 0x0200;
157 new_stereo_mode
= itv
->params
.audio_properties
& stereo_mask
;
158 memset(&vt
, 0, sizeof(vt
));
159 ivtv_call_all(itv
, tuner
, 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
[8] = { -1, V4L2_ENC_IDX_FRAME_I
, V4L2_ENC_IDX_FRAME_P
, -1,
194 V4L2_ENC_IDX_FRAME_B
, -1, -1, -1 };
197 e
->offset
= read_enc(addr
+ 4) + ((u64
)read_enc(addr
+ 8) << 32);
198 if (e
->offset
> itv
->mpg_data_received
) {
201 e
->offset
+= itv
->vbi_data_inserted
;
202 e
->length
= read_enc(addr
);
203 e
->pts
= read_enc(addr
+ 16) + ((u64
)(read_enc(addr
+ 20) & 1) << 32);
204 e
->flags
= mapping
[read_enc(addr
+ 12) & 7];
207 itv
->pgm_info_write_idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
210 static struct ivtv_buffer
*ivtv_get_buffer(struct ivtv_stream
*s
, int non_block
, int *err
)
212 struct ivtv
*itv
= s
->itv
;
213 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
214 struct ivtv_buffer
*buf
;
219 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
) {
220 /* Process pending program info updates and pending VBI data */
221 ivtv_update_pgm_info(itv
);
223 if (time_after(jiffies
,
224 itv
->dualwatch_jiffies
+
225 msecs_to_jiffies(1000))) {
226 itv
->dualwatch_jiffies
= jiffies
;
230 if (test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
231 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
232 while ((buf
= ivtv_dequeue(s_vbi
, &s_vbi
->q_full
))) {
233 /* byteswap and process VBI data */
234 ivtv_process_vbi_data(itv
, buf
, s_vbi
->dma_pts
, s_vbi
->type
);
235 ivtv_enqueue(s_vbi
, buf
, &s_vbi
->q_free
);
238 buf
= &itv
->vbi
.sliced_mpeg_buf
;
239 if (buf
->readpos
!= buf
->bytesused
) {
244 /* do we have leftover data? */
245 buf
= ivtv_dequeue(s
, &s
->q_io
);
249 /* do we have new data? */
250 buf
= ivtv_dequeue(s
, &s
->q_full
);
252 if ((buf
->b_flags
& IVTV_F_B_NEED_BUF_SWAP
) == 0)
254 buf
->b_flags
&= ~IVTV_F_B_NEED_BUF_SWAP
;
255 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
256 /* byteswap MPG data */
258 else if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
) {
259 /* byteswap and process VBI data */
260 ivtv_process_vbi_data(itv
, buf
, s
->dma_pts
, s
->type
);
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 IVTV_DEBUG_INFO("EOS %s\n", s
->name
);
271 /* return if file was opened with O_NONBLOCK */
277 /* wait for more data to arrive */
278 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
279 /* New buffers might have become available before we were added to the waitqueue */
280 if (!s
->q_full
.buffers
)
282 finish_wait(&s
->waitq
, &wait
);
283 if (signal_pending(current
)) {
284 /* return if a signal was received */
285 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
292 static void ivtv_setup_sliced_vbi_buf(struct ivtv
*itv
)
294 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
296 itv
->vbi
.sliced_mpeg_buf
.buf
= itv
->vbi
.sliced_mpeg_data
[idx
];
297 itv
->vbi
.sliced_mpeg_buf
.bytesused
= itv
->vbi
.sliced_mpeg_size
[idx
];
298 itv
->vbi
.sliced_mpeg_buf
.readpos
= 0;
301 static size_t ivtv_copy_buf_to_user(struct ivtv_stream
*s
, struct ivtv_buffer
*buf
,
302 char __user
*ubuf
, size_t ucount
)
304 struct ivtv
*itv
= s
->itv
;
305 size_t len
= buf
->bytesused
- buf
->readpos
;
307 if (len
> ucount
) len
= ucount
;
308 if (itv
->vbi
.insert_mpeg
&& s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
309 !ivtv_raw_vbi(itv
) && buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
310 const char *start
= buf
->buf
+ buf
->readpos
;
311 const char *p
= start
+ 1;
313 u8 ch
= itv
->search_pack_header
? 0xba : 0xe0;
316 while (start
+ len
> p
&& (q
= memchr(p
, 0, start
+ len
- p
))) {
318 if ((char *)q
+ 15 >= buf
->buf
+ buf
->bytesused
||
319 q
[1] != 0 || q
[2] != 1 || q
[3] != ch
) {
322 if (!itv
->search_pack_header
) {
323 if ((q
[6] & 0xc0) != 0x80)
325 if (((q
[7] & 0xc0) == 0x80 && (q
[9] & 0xf0) == 0x20) ||
326 ((q
[7] & 0xc0) == 0xc0 && (q
[9] & 0xf0) == 0x30)) {
328 itv
->search_pack_header
= 1;
333 stuffing
= q
[13] & 7;
334 /* all stuffing bytes must be 0xff */
335 for (i
= 0; i
< stuffing
; i
++)
336 if (q
[14 + i
] != 0xff)
338 if (i
== stuffing
&& (q
[4] & 0xc4) == 0x44 && (q
[12] & 3) == 3 &&
339 q
[14 + stuffing
] == 0 && q
[15 + stuffing
] == 0 &&
340 q
[16 + stuffing
] == 1) {
341 itv
->search_pack_header
= 0;
342 len
= (char *)q
- start
;
343 ivtv_setup_sliced_vbi_buf(itv
);
348 if (copy_to_user(ubuf
, (u8
*)buf
->buf
+ buf
->readpos
, len
)) {
349 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len
, s
->name
);
352 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
353 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
354 buf == &itv->vbi.sliced_mpeg_buf); */
356 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&& buf
!= &itv
->vbi
.sliced_mpeg_buf
)
357 itv
->mpg_data_received
+= len
;
361 static ssize_t
ivtv_read(struct ivtv_stream
*s
, char __user
*ubuf
, size_t tot_count
, int non_block
)
363 struct ivtv
*itv
= s
->itv
;
364 size_t tot_written
= 0;
365 int single_frame
= 0;
367 if (atomic_read(&itv
->capturing
) == 0 && s
->id
== -1) {
368 /* shouldn't happen */
369 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s
->name
);
373 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
374 arrive one-by-one, so make sure we never output more than one VBI frame at a time */
375 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
376 (s
->type
== IVTV_ENC_STREAM_TYPE_VBI
&& !ivtv_raw_vbi(itv
)))
380 struct ivtv_buffer
*buf
;
383 buf
= ivtv_get_buffer(s
, non_block
, &rc
);
384 /* if there is no data available... */
386 /* if we got data, then return that regardless */
391 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
392 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
393 ivtv_release_stream(s
);
398 rc
= ivtv_copy_buf_to_user(s
, buf
, ubuf
+ tot_written
, tot_count
- tot_written
);
399 if (buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
400 ivtv_enqueue(s
, buf
, (buf
->readpos
== buf
->bytesused
) ? &s
->q_free
: &s
->q_io
);
402 else if (buf
->readpos
== buf
->bytesused
) {
403 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
404 itv
->vbi
.sliced_mpeg_size
[idx
] = 0;
405 itv
->vbi
.inserted_frame
++;
406 itv
->vbi_data_inserted
+= buf
->bytesused
;
412 if (tot_written
== tot_count
|| single_frame
)
418 static ssize_t
ivtv_read_pos(struct ivtv_stream
*s
, char __user
*ubuf
, size_t count
,
419 loff_t
*pos
, int non_block
)
421 ssize_t rc
= count
? ivtv_read(s
, ubuf
, count
, non_block
) : 0;
422 struct ivtv
*itv
= s
->itv
;
424 IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count
, s
->name
, rc
);
430 int ivtv_start_capture(struct ivtv_open_id
*id
)
432 struct ivtv
*itv
= id
->itv
;
433 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
434 struct ivtv_stream
*s_vbi
;
436 if (s
->type
== IVTV_ENC_STREAM_TYPE_RAD
||
437 s
->type
== IVTV_DEC_STREAM_TYPE_MPG
||
438 s
->type
== IVTV_DEC_STREAM_TYPE_YUV
||
439 s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
440 /* you cannot read from these stream types. */
444 /* Try to claim this stream. */
445 if (ivtv_claim_stream(id
, s
->type
))
448 /* This stream does not need to start capturing */
449 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
) {
450 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
454 /* If capture is already in progress, then we also have to
456 if (test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
) || test_and_set_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
457 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
461 /* Start VBI capture if required */
462 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
463 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
464 test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
465 !test_and_set_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
466 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
467 automatically when the MPG stream is claimed.
468 We only need to start the VBI capturing. */
469 if (ivtv_start_v4l2_encode_stream(s_vbi
)) {
470 IVTV_DEBUG_WARN("VBI capture start failed\n");
472 /* Failure, clean up and return an error */
473 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
474 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
475 /* also releases the associated VBI stream */
476 ivtv_release_stream(s
);
479 IVTV_DEBUG_INFO("VBI insertion started\n");
482 /* Tell the card to start capturing */
483 if (!ivtv_start_v4l2_encode_stream(s
)) {
485 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
486 /* Resume a possibly paused encoder */
487 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED
, &itv
->i_flags
))
488 ivtv_vapi(itv
, CX2341X_ENC_PAUSE_ENCODER
, 1, 1);
492 /* failure, clean up */
493 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s
->name
);
495 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
496 automatically when the MPG stream is released.
497 We only need to stop the VBI capturing. */
498 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
499 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
500 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
501 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
503 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
504 ivtv_release_stream(s
);
508 ssize_t
ivtv_v4l2_read(struct file
* filp
, char __user
*buf
, size_t count
, loff_t
* pos
)
510 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
511 struct ivtv
*itv
= id
->itv
;
512 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
515 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count
, s
->name
);
517 mutex_lock(&itv
->serialize_lock
);
518 rc
= ivtv_start_capture(id
);
519 mutex_unlock(&itv
->serialize_lock
);
522 return ivtv_read_pos(s
, buf
, count
, pos
, filp
->f_flags
& O_NONBLOCK
);
525 int ivtv_start_decoding(struct ivtv_open_id
*id
, int speed
)
527 struct ivtv
*itv
= id
->itv
;
528 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
530 if (atomic_read(&itv
->decoding
) == 0) {
531 if (ivtv_claim_stream(id
, s
->type
)) {
532 /* someone else is using this stream already */
533 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
536 ivtv_start_v4l2_decode_stream(s
, 0);
538 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
539 return ivtv_set_speed(itv
, speed
);
543 ssize_t
ivtv_v4l2_write(struct file
*filp
, const char __user
*user_buf
, size_t count
, loff_t
*pos
)
545 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
546 struct ivtv
*itv
= id
->itv
;
547 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
548 struct yuv_playback_info
*yi
= &itv
->yuv_info
;
549 struct ivtv_buffer
*buf
;
551 int bytes_written
= 0;
556 IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count
, s
->name
);
558 if (s
->type
!= IVTV_DEC_STREAM_TYPE_MPG
&&
559 s
->type
!= IVTV_DEC_STREAM_TYPE_YUV
&&
560 s
->type
!= IVTV_DEC_STREAM_TYPE_VOUT
)
561 /* not decoder streams */
564 /* Try to claim this stream */
565 if (ivtv_claim_stream(id
, s
->type
))
568 /* This stream does not need to start any decoding */
569 if (s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
570 int elems
= count
/ sizeof(struct v4l2_sliced_vbi_data
);
572 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
573 ivtv_write_vbi(itv
, (const struct v4l2_sliced_vbi_data
*)user_buf
, elems
);
574 return elems
* sizeof(struct v4l2_sliced_vbi_data
);
577 mode
= s
->type
== IVTV_DEC_STREAM_TYPE_MPG
? OUT_MPG
: OUT_YUV
;
579 if (ivtv_set_output_mode(itv
, mode
) != mode
) {
580 ivtv_release_stream(s
);
584 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
586 /* Start decoder (returns 0 if already started) */
587 mutex_lock(&itv
->serialize_lock
);
588 rc
= ivtv_start_decoding(id
, itv
->speed
);
589 mutex_unlock(&itv
->serialize_lock
);
591 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s
->name
);
593 /* failure, clean up */
594 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
595 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
600 /* If possible, just DMA the entire frame - Check the data transfer size
601 since we may get here before the stream has been fully set-up */
602 if (mode
== OUT_YUV
&& s
->q_full
.length
== 0 && itv
->dma_data_req_size
) {
603 while (count
>= itv
->dma_data_req_size
) {
604 rc
= ivtv_yuv_udma_stream_frame(itv
, (void __user
*)user_buf
);
609 bytes_written
+= itv
->dma_data_req_size
;
610 user_buf
+= itv
->dma_data_req_size
;
611 count
-= itv
->dma_data_req_size
;
614 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written
, s
->name
, s
->q_full
.bytesused
);
615 return bytes_written
;
621 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_io
)))
622 ivtv_enqueue(s
, buf
, &q
);
623 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_free
))) {
624 ivtv_enqueue(s
, buf
, &q
);
628 if (filp
->f_flags
& O_NONBLOCK
)
630 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
631 /* New buffers might have become free before we were added to the waitqueue */
632 if (!s
->q_free
.buffers
)
634 finish_wait(&s
->waitq
, &wait
);
635 if (signal_pending(current
)) {
636 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
641 /* copy user data into buffers */
642 while ((buf
= ivtv_dequeue(s
, &q
))) {
643 /* yuv is a pain. Don't copy more data than needed for a single
644 frame, otherwise we lose sync with the incoming stream */
645 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
646 yi
->stream_size
+ count
> itv
->dma_data_req_size
)
647 rc
= ivtv_buf_copy_from_user(s
, buf
, user_buf
,
648 itv
->dma_data_req_size
- yi
->stream_size
);
650 rc
= ivtv_buf_copy_from_user(s
, buf
, user_buf
, count
);
652 /* Make sure we really got all the user data */
654 ivtv_queue_move(s
, &q
, NULL
, &s
->q_free
, 0);
661 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
662 yi
->stream_size
+= rc
;
663 /* If we have a complete yuv frame, break loop now */
664 if (yi
->stream_size
== itv
->dma_data_req_size
) {
665 ivtv_enqueue(s
, buf
, &s
->q_full
);
671 if (buf
->bytesused
!= s
->buf_size
) {
672 /* incomplete, leave in q_io for next time */
673 ivtv_enqueue(s
, buf
, &s
->q_io
);
676 /* Byteswap MPEG buffer */
677 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
679 ivtv_enqueue(s
, buf
, &s
->q_full
);
682 if (test_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
)) {
683 if (s
->q_full
.length
>= itv
->dma_data_req_size
) {
687 ivtv_yuv_setup_stream_frame(itv
);
689 prepare_to_wait(&itv
->dma_waitq
, &wait
, TASK_INTERRUPTIBLE
);
690 while (!(got_sig
= signal_pending(current
)) &&
691 test_bit(IVTV_F_S_DMA_PENDING
, &s
->s_flags
)) {
694 finish_wait(&itv
->dma_waitq
, &wait
);
696 IVTV_DEBUG_INFO("User interrupted %s\n", s
->name
);
700 clear_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
);
701 ivtv_queue_move(s
, &s
->q_full
, NULL
, &s
->q_predma
, itv
->dma_data_req_size
);
702 ivtv_dma_stream_dec_prepare(s
, itv
->dma_data_req_offset
+ IVTV_DECODER_OFFSET
, 1);
705 /* more user data is available, wait until buffers become free
706 to transfer the rest. */
707 if (count
&& !(filp
->f_flags
& O_NONBLOCK
))
709 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written
, s
->name
, s
->q_full
.bytesused
);
710 return bytes_written
;
713 unsigned int ivtv_v4l2_dec_poll(struct file
*filp
, poll_table
*wait
)
715 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
716 struct ivtv
*itv
= id
->itv
;
717 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
720 /* add stream's waitq to the poll list */
721 IVTV_DEBUG_HI_FILE("Decoder poll\n");
723 /* If there are subscribed events, then only use the new event
724 API instead of the old video.h based API. */
725 if (!list_empty(&id
->fh
.events
->subscribed
)) {
726 poll_wait(filp
, &id
->fh
.events
->wait
, wait
);
727 /* Turn off the old-style vsync events */
728 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED
, &itv
->i_flags
);
729 if (v4l2_event_pending(&id
->fh
))
732 /* This is the old-style API which is here only for backwards
734 poll_wait(filp
, &s
->waitq
, wait
);
735 set_bit(IVTV_F_I_EV_VSYNC_ENABLED
, &itv
->i_flags
);
736 if (test_bit(IVTV_F_I_EV_VSYNC
, &itv
->i_flags
) ||
737 test_bit(IVTV_F_I_EV_DEC_STOPPED
, &itv
->i_flags
))
741 /* Allow write if buffers are available for writing */
742 if (s
->q_free
.buffers
)
743 res
|= POLLOUT
| POLLWRNORM
;
747 unsigned int ivtv_v4l2_enc_poll(struct file
*filp
, poll_table
* wait
)
749 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
750 struct ivtv
*itv
= id
->itv
;
751 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
752 int eof
= test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
754 /* Start a capture if there is none */
755 if (!eof
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
758 mutex_lock(&itv
->serialize_lock
);
759 rc
= ivtv_start_capture(id
);
760 mutex_unlock(&itv
->serialize_lock
);
762 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
766 IVTV_DEBUG_FILE("Encoder poll started capture\n");
769 /* add stream's waitq to the poll list */
770 IVTV_DEBUG_HI_FILE("Encoder poll\n");
771 poll_wait(filp
, &s
->waitq
, wait
);
773 if (s
->q_full
.length
|| s
->q_io
.length
)
774 return POLLIN
| POLLRDNORM
;
780 void ivtv_stop_capture(struct ivtv_open_id
*id
, int gop_end
)
782 struct ivtv
*itv
= id
->itv
;
783 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
785 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
787 /* 'Unclaim' this stream */
790 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
791 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
793 IVTV_DEBUG_INFO("close stopping capture\n");
794 /* Special case: a running VBI capture for VBI insertion
795 in the mpeg stream. Need to stop that too. */
796 if (id
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
797 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
) &&
798 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
799 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
800 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
802 if ((id
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
803 id
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
804 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
805 /* Also used internally, don't stop capturing */
809 ivtv_stop_v4l2_encode_stream(s
, gop_end
);
813 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
814 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
815 ivtv_release_stream(s
);
819 static void ivtv_stop_decoding(struct ivtv_open_id
*id
, int flags
, u64 pts
)
821 struct ivtv
*itv
= id
->itv
;
822 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
824 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
826 if (id
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
827 test_bit(IVTV_F_I_DECODING_YUV
, &itv
->i_flags
)) {
828 /* Restore registers we've changed & clean up any mess */
833 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
834 IVTV_DEBUG_INFO("close stopping decode\n");
836 ivtv_stop_v4l2_decode_stream(s
, flags
, pts
);
837 itv
->output_mode
= OUT_NONE
;
839 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
840 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
842 if (itv
->output_mode
== OUT_UDMA_YUV
&& id
->yuv_frames
)
843 itv
->output_mode
= OUT_NONE
;
846 clear_bit(IVTV_F_I_DEC_PAUSED
, &itv
->i_flags
);
847 ivtv_release_stream(s
);
850 int ivtv_v4l2_close(struct file
*filp
)
852 struct v4l2_fh
*fh
= filp
->private_data
;
853 struct ivtv_open_id
*id
= fh2id(fh
);
854 struct ivtv
*itv
= id
->itv
;
855 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
857 IVTV_DEBUG_FILE("close %s\n", s
->name
);
859 v4l2_prio_close(&itv
->prio
, id
->prio
);
863 /* Easy case first: this stream was never claimed by us */
864 if (s
->id
!= id
->open_id
) {
869 /* 'Unclaim' this stream */
872 mutex_lock(&itv
->serialize_lock
);
873 if (id
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
874 /* Closing radio device, return to TV mode */
876 /* Mark that the radio is no longer in use */
877 clear_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
878 /* Switch tuner to TV */
879 ivtv_call_all(itv
, core
, s_std
, itv
->std
);
880 /* Select correct audio input (i.e. TV tuner or Line in) */
881 ivtv_audio_set_io(itv
);
882 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
883 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
884 SAA7115_FREQ_32_11_MHZ
, 0);
886 if (atomic_read(&itv
->capturing
) > 0) {
887 /* Undo video mute */
888 ivtv_vapi(itv
, CX2341X_ENC_MUTE_VIDEO
, 1,
889 itv
->params
.video_mute
| (itv
->params
.video_mute_yuv
<< 8));
891 /* Done! Unmute and continue. */
893 ivtv_release_stream(s
);
894 } else if (s
->type
>= IVTV_DEC_STREAM_TYPE_MPG
) {
895 struct ivtv_stream
*s_vout
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VOUT
];
897 ivtv_stop_decoding(id
, VIDEO_CMD_STOP_TO_BLACK
| VIDEO_CMD_STOP_IMMEDIATELY
, 0);
899 /* If all output streams are closed, and if the user doesn't have
900 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
901 if (itv
->output_mode
== OUT_NONE
&& !test_bit(IVTV_F_S_APPL_IO
, &s_vout
->s_flags
)) {
902 /* disable CC on TV-out */
903 ivtv_disable_cc(itv
);
906 ivtv_stop_capture(id
, 0);
909 mutex_unlock(&itv
->serialize_lock
);
913 static int ivtv_serialized_open(struct ivtv_stream
*s
, struct file
*filp
)
915 struct ivtv
*itv
= s
->itv
;
916 struct ivtv_open_id
*item
;
919 IVTV_DEBUG_FILE("open %s\n", s
->name
);
921 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
&&
922 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_YUV
].s_flags
))
925 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
926 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_MPG
].s_flags
))
929 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
930 if (read_reg(0x82c) == 0) {
931 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
932 /* return -ENODEV; */
934 ivtv_udma_alloc(itv
);
937 /* Allocate memory */
938 item
= kzalloc(sizeof(struct ivtv_open_id
), GFP_KERNEL
);
940 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
943 v4l2_fh_init(&item
->fh
, s
->vdev
);
944 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
||
945 s
->type
== IVTV_DEC_STREAM_TYPE_MPG
) {
946 res
= v4l2_event_alloc(&item
->fh
, 60);
949 v4l2_fh_exit(&item
->fh
);
954 item
->type
= s
->type
;
955 v4l2_prio_open(&itv
->prio
, &item
->prio
);
957 item
->open_id
= itv
->open_id
++;
958 filp
->private_data
= &item
->fh
;
960 if (item
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
961 /* Try to claim this stream */
962 if (ivtv_claim_stream(item
, item
->type
)) {
963 /* No, it's already in use */
968 if (!test_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
)) {
969 if (atomic_read(&itv
->capturing
) > 0) {
970 /* switching to radio while capture is
971 in progress is not polite */
972 ivtv_release_stream(s
);
973 v4l2_fh_exit(&item
->fh
);
978 /* Mark that the radio is being used. */
979 set_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
980 /* We have the radio */
982 /* Switch tuner to radio */
983 ivtv_call_all(itv
, tuner
, s_radio
);
984 /* Select the correct audio input (i.e. radio tuner) */
985 ivtv_audio_set_io(itv
);
986 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
987 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
988 SAA7115_FREQ_32_11_MHZ
, SAA7115_FREQ_FL_APLL
);
990 /* Done! Unmute and continue. */
994 /* YUV or MPG Decoding Mode? */
995 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
) {
996 clear_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
997 } else if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
998 set_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
999 /* For yuv, we need to know the dma size before we start */
1000 itv
->dma_data_req_size
=
1001 1080 * ((itv
->yuv_info
.v4l2_src_h
+ 31) & ~31);
1002 itv
->yuv_info
.stream_size
= 0;
1004 v4l2_fh_add(&item
->fh
);
1008 int ivtv_v4l2_open(struct file
*filp
)
1011 struct ivtv
*itv
= NULL
;
1012 struct ivtv_stream
*s
= NULL
;
1013 struct video_device
*vdev
= video_devdata(filp
);
1015 s
= video_get_drvdata(vdev
);
1018 mutex_lock(&itv
->serialize_lock
);
1019 if (ivtv_init_on_first_open(itv
)) {
1020 IVTV_ERR("Failed to initialize on device %s\n",
1021 video_device_node_name(vdev
));
1022 mutex_unlock(&itv
->serialize_lock
);
1025 res
= ivtv_serialized_open(s
, filp
);
1026 mutex_unlock(&itv
->serialize_lock
);
1030 void ivtv_mute(struct ivtv
*itv
)
1032 if (atomic_read(&itv
->capturing
))
1033 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 1);
1034 IVTV_DEBUG_INFO("Mute\n");
1037 void ivtv_unmute(struct ivtv
*itv
)
1039 if (atomic_read(&itv
->capturing
)) {
1040 ivtv_msleep_timeout(100, 0);
1041 ivtv_vapi(itv
, CX2341X_ENC_MISC
, 1, 12);
1042 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 0);
1044 IVTV_DEBUG_INFO("Unmute\n");