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 "ivtv-firmware.h"
36 #include <media/v4l2-event.h>
37 #include <media/saa7115.h>
39 /* This function tries to claim the stream for a specific file descriptor.
40 If no one else is using this stream then the stream is claimed and
41 associated VBI streams are also automatically claimed.
42 Possible error returns: -EBUSY if someone else has claimed
43 the stream or 0 on success. */
44 static int ivtv_claim_stream(struct ivtv_open_id
*id
, int type
)
46 struct ivtv
*itv
= id
->itv
;
47 struct ivtv_stream
*s
= &itv
->streams
[type
];
48 struct ivtv_stream
*s_vbi
;
51 if (test_and_set_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
52 /* someone already claimed this stream */
53 if (s
->id
== id
->open_id
) {
54 /* yes, this file descriptor did. So that's OK. */
57 if (s
->id
== -1 && (type
== IVTV_DEC_STREAM_TYPE_VBI
||
58 type
== IVTV_ENC_STREAM_TYPE_VBI
)) {
59 /* VBI is handled already internally, now also assign
60 the file descriptor to this stream for external
61 reading of the stream. */
63 IVTV_DEBUG_INFO("Start Read VBI\n");
66 /* someone else is using this stream already */
67 IVTV_DEBUG_INFO("Stream %d is busy\n", type
);
71 if (type
== IVTV_DEC_STREAM_TYPE_VBI
) {
72 /* Enable reinsertion interrupt */
73 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
76 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
77 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
78 (provided VBI insertion is on and sliced VBI is selected), for all
79 other streams we're done */
80 if (type
== IVTV_DEC_STREAM_TYPE_MPG
) {
81 vbi_type
= IVTV_DEC_STREAM_TYPE_VBI
;
82 } else if (type
== IVTV_ENC_STREAM_TYPE_MPG
&&
83 itv
->vbi
.insert_mpeg
&& !ivtv_raw_vbi(itv
)) {
84 vbi_type
= IVTV_ENC_STREAM_TYPE_VBI
;
88 s_vbi
= &itv
->streams
[vbi_type
];
90 if (!test_and_set_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
)) {
91 /* Enable reinsertion interrupt */
92 if (vbi_type
== IVTV_DEC_STREAM_TYPE_VBI
)
93 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
95 /* mark that it is used internally */
96 set_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
);
100 /* This function releases a previously claimed stream. It will take into
101 account associated VBI streams. */
102 void ivtv_release_stream(struct ivtv_stream
*s
)
104 struct ivtv
*itv
= s
->itv
;
105 struct ivtv_stream
*s_vbi
;
108 if ((s
->type
== IVTV_DEC_STREAM_TYPE_VBI
|| s
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
109 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
110 /* this stream is still in use internally */
113 if (!test_and_clear_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
114 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s
->name
);
118 ivtv_flush_queues(s
);
120 /* disable reinsertion interrupt */
121 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
122 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
124 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI,
125 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI,
126 for all other streams we're done */
127 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
128 s_vbi
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VBI
];
129 else if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
130 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
134 /* clear internal use flag */
135 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
)) {
136 /* was already cleared */
139 if (s_vbi
->id
!= -1) {
140 /* VBI stream still claimed by a file descriptor */
143 /* disable reinsertion interrupt */
144 if (s_vbi
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
145 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
146 clear_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
);
147 ivtv_flush_queues(s_vbi
);
150 static void ivtv_dualwatch(struct ivtv
*itv
)
152 struct v4l2_tuner vt
;
154 const u32 dual
= 0x02;
156 new_stereo_mode
= v4l2_ctrl_g_ctrl(itv
->cxhdl
.audio_mode
);
157 memset(&vt
, 0, sizeof(vt
));
158 ivtv_call_all(itv
, tuner
, g_tuner
, &vt
);
159 if (vt
.audmode
== V4L2_TUNER_MODE_LANG1_LANG2
&& (vt
.rxsubchans
& V4L2_TUNER_SUB_LANG2
))
160 new_stereo_mode
= dual
;
162 if (new_stereo_mode
== itv
->dualwatch_stereo_mode
)
165 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n",
166 itv
->dualwatch_stereo_mode
, new_stereo_mode
);
167 if (v4l2_ctrl_s_ctrl(itv
->cxhdl
.audio_mode
, new_stereo_mode
))
168 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
171 static void ivtv_update_pgm_info(struct ivtv
*itv
)
173 u32 wr_idx
= (read_enc(itv
->pgm_info_offset
) - itv
->pgm_info_offset
- 4) / 24;
177 if (wr_idx
>= itv
->pgm_info_num
) {
178 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx
, itv
->pgm_info_num
);
181 cnt
= (wr_idx
+ itv
->pgm_info_num
- itv
->pgm_info_write_idx
) % itv
->pgm_info_num
;
183 int idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
184 struct v4l2_enc_idx_entry
*e
= itv
->pgm_info
+ idx
;
185 u32 addr
= itv
->pgm_info_offset
+ 4 + idx
* 24;
186 const int mapping
[8] = { -1, V4L2_ENC_IDX_FRAME_I
, V4L2_ENC_IDX_FRAME_P
, -1,
187 V4L2_ENC_IDX_FRAME_B
, -1, -1, -1 };
190 e
->offset
= read_enc(addr
+ 4) + ((u64
)read_enc(addr
+ 8) << 32);
191 if (e
->offset
> itv
->mpg_data_received
) {
194 e
->offset
+= itv
->vbi_data_inserted
;
195 e
->length
= read_enc(addr
);
196 e
->pts
= read_enc(addr
+ 16) + ((u64
)(read_enc(addr
+ 20) & 1) << 32);
197 e
->flags
= mapping
[read_enc(addr
+ 12) & 7];
200 itv
->pgm_info_write_idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
203 static struct ivtv_buffer
*ivtv_get_buffer(struct ivtv_stream
*s
, int non_block
, int *err
)
205 struct ivtv
*itv
= s
->itv
;
206 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
207 struct ivtv_buffer
*buf
;
212 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
) {
213 /* Process pending program info updates and pending VBI data */
214 ivtv_update_pgm_info(itv
);
216 if (time_after(jiffies
,
217 itv
->dualwatch_jiffies
+
218 msecs_to_jiffies(1000))) {
219 itv
->dualwatch_jiffies
= jiffies
;
223 if (test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
224 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
225 while ((buf
= ivtv_dequeue(s_vbi
, &s_vbi
->q_full
))) {
226 /* byteswap and process VBI data */
227 ivtv_process_vbi_data(itv
, buf
, s_vbi
->dma_pts
, s_vbi
->type
);
228 ivtv_enqueue(s_vbi
, buf
, &s_vbi
->q_free
);
231 buf
= &itv
->vbi
.sliced_mpeg_buf
;
232 if (buf
->readpos
!= buf
->bytesused
) {
237 /* do we have leftover data? */
238 buf
= ivtv_dequeue(s
, &s
->q_io
);
242 /* do we have new data? */
243 buf
= ivtv_dequeue(s
, &s
->q_full
);
245 if ((buf
->b_flags
& IVTV_F_B_NEED_BUF_SWAP
) == 0)
247 buf
->b_flags
&= ~IVTV_F_B_NEED_BUF_SWAP
;
248 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
249 /* byteswap MPG data */
251 else if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
) {
252 /* byteswap and process VBI data */
253 ivtv_process_vbi_data(itv
, buf
, s
->dma_pts
, s
->type
);
258 /* return if end of stream */
259 if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
260 IVTV_DEBUG_INFO("EOS %s\n", s
->name
);
264 /* return if file was opened with O_NONBLOCK */
270 /* wait for more data to arrive */
271 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
272 /* New buffers might have become available before we were added to the waitqueue */
273 if (!s
->q_full
.buffers
)
275 finish_wait(&s
->waitq
, &wait
);
276 if (signal_pending(current
)) {
277 /* return if a signal was received */
278 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
285 static void ivtv_setup_sliced_vbi_buf(struct ivtv
*itv
)
287 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
289 itv
->vbi
.sliced_mpeg_buf
.buf
= itv
->vbi
.sliced_mpeg_data
[idx
];
290 itv
->vbi
.sliced_mpeg_buf
.bytesused
= itv
->vbi
.sliced_mpeg_size
[idx
];
291 itv
->vbi
.sliced_mpeg_buf
.readpos
= 0;
294 static size_t ivtv_copy_buf_to_user(struct ivtv_stream
*s
, struct ivtv_buffer
*buf
,
295 char __user
*ubuf
, size_t ucount
)
297 struct ivtv
*itv
= s
->itv
;
298 size_t len
= buf
->bytesused
- buf
->readpos
;
300 if (len
> ucount
) len
= ucount
;
301 if (itv
->vbi
.insert_mpeg
&& s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
302 !ivtv_raw_vbi(itv
) && buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
303 const char *start
= buf
->buf
+ buf
->readpos
;
304 const char *p
= start
+ 1;
306 u8 ch
= itv
->search_pack_header
? 0xba : 0xe0;
309 while (start
+ len
> p
&& (q
= memchr(p
, 0, start
+ len
- p
))) {
311 if ((char *)q
+ 15 >= buf
->buf
+ buf
->bytesused
||
312 q
[1] != 0 || q
[2] != 1 || q
[3] != ch
) {
315 if (!itv
->search_pack_header
) {
316 if ((q
[6] & 0xc0) != 0x80)
318 if (((q
[7] & 0xc0) == 0x80 && (q
[9] & 0xf0) == 0x20) ||
319 ((q
[7] & 0xc0) == 0xc0 && (q
[9] & 0xf0) == 0x30)) {
321 itv
->search_pack_header
= 1;
326 stuffing
= q
[13] & 7;
327 /* all stuffing bytes must be 0xff */
328 for (i
= 0; i
< stuffing
; i
++)
329 if (q
[14 + i
] != 0xff)
331 if (i
== stuffing
&& (q
[4] & 0xc4) == 0x44 && (q
[12] & 3) == 3 &&
332 q
[14 + stuffing
] == 0 && q
[15 + stuffing
] == 0 &&
333 q
[16 + stuffing
] == 1) {
334 itv
->search_pack_header
= 0;
335 len
= (char *)q
- start
;
336 ivtv_setup_sliced_vbi_buf(itv
);
341 if (copy_to_user(ubuf
, (u8
*)buf
->buf
+ buf
->readpos
, len
)) {
342 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len
, s
->name
);
345 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
346 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
347 buf == &itv->vbi.sliced_mpeg_buf); */
349 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&& buf
!= &itv
->vbi
.sliced_mpeg_buf
)
350 itv
->mpg_data_received
+= len
;
354 static ssize_t
ivtv_read(struct ivtv_stream
*s
, char __user
*ubuf
, size_t tot_count
, int non_block
)
356 struct ivtv
*itv
= s
->itv
;
357 size_t tot_written
= 0;
358 int single_frame
= 0;
360 if (atomic_read(&itv
->capturing
) == 0 && s
->id
== -1) {
361 /* shouldn't happen */
362 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s
->name
);
366 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
367 arrive one-by-one, so make sure we never output more than one VBI frame at a time */
368 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
369 (s
->type
== IVTV_ENC_STREAM_TYPE_VBI
&& !ivtv_raw_vbi(itv
)))
373 struct ivtv_buffer
*buf
;
376 buf
= ivtv_get_buffer(s
, non_block
, &rc
);
377 /* if there is no data available... */
379 /* if we got data, then return that regardless */
384 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
385 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
386 ivtv_release_stream(s
);
391 rc
= ivtv_copy_buf_to_user(s
, buf
, ubuf
+ tot_written
, tot_count
- tot_written
);
392 if (buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
393 ivtv_enqueue(s
, buf
, (buf
->readpos
== buf
->bytesused
) ? &s
->q_free
: &s
->q_io
);
395 else if (buf
->readpos
== buf
->bytesused
) {
396 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
397 itv
->vbi
.sliced_mpeg_size
[idx
] = 0;
398 itv
->vbi
.inserted_frame
++;
399 itv
->vbi_data_inserted
+= buf
->bytesused
;
405 if (tot_written
== tot_count
|| single_frame
)
411 static ssize_t
ivtv_read_pos(struct ivtv_stream
*s
, char __user
*ubuf
, size_t count
,
412 loff_t
*pos
, int non_block
)
414 ssize_t rc
= count
? ivtv_read(s
, ubuf
, count
, non_block
) : 0;
415 struct ivtv
*itv
= s
->itv
;
417 IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count
, s
->name
, rc
);
423 int ivtv_start_capture(struct ivtv_open_id
*id
)
425 struct ivtv
*itv
= id
->itv
;
426 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
427 struct ivtv_stream
*s_vbi
;
429 if (s
->type
== IVTV_ENC_STREAM_TYPE_RAD
||
430 s
->type
== IVTV_DEC_STREAM_TYPE_MPG
||
431 s
->type
== IVTV_DEC_STREAM_TYPE_YUV
||
432 s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
433 /* you cannot read from these stream types. */
437 /* Try to claim this stream. */
438 if (ivtv_claim_stream(id
, s
->type
))
441 /* This stream does not need to start capturing */
442 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
) {
443 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
447 /* If capture is already in progress, then we also have to
449 if (test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
) || test_and_set_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
450 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
454 /* Start VBI capture if required */
455 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
456 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
457 test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
458 !test_and_set_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
459 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
460 automatically when the MPG stream is claimed.
461 We only need to start the VBI capturing. */
462 if (ivtv_start_v4l2_encode_stream(s_vbi
)) {
463 IVTV_DEBUG_WARN("VBI capture start failed\n");
465 /* Failure, clean up and return an error */
466 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
467 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
468 /* also releases the associated VBI stream */
469 ivtv_release_stream(s
);
472 IVTV_DEBUG_INFO("VBI insertion started\n");
475 /* Tell the card to start capturing */
476 if (!ivtv_start_v4l2_encode_stream(s
)) {
478 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
479 /* Resume a possibly paused encoder */
480 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED
, &itv
->i_flags
))
481 ivtv_vapi(itv
, CX2341X_ENC_PAUSE_ENCODER
, 1, 1);
485 /* failure, clean up */
486 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s
->name
);
488 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
489 automatically when the MPG stream is released.
490 We only need to stop the VBI capturing. */
491 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
492 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
493 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
494 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
496 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
497 ivtv_release_stream(s
);
501 ssize_t
ivtv_v4l2_read(struct file
* filp
, char __user
*buf
, size_t count
, loff_t
* pos
)
503 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
504 struct ivtv
*itv
= id
->itv
;
505 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
508 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count
, s
->name
);
510 mutex_lock(&itv
->serialize_lock
);
511 rc
= ivtv_start_capture(id
);
512 mutex_unlock(&itv
->serialize_lock
);
515 return ivtv_read_pos(s
, buf
, count
, pos
, filp
->f_flags
& O_NONBLOCK
);
518 int ivtv_start_decoding(struct ivtv_open_id
*id
, int speed
)
520 struct ivtv
*itv
= id
->itv
;
521 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
524 if (atomic_read(&itv
->decoding
) == 0) {
525 if (ivtv_claim_stream(id
, s
->type
)) {
526 /* someone else is using this stream already */
527 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
530 rc
= ivtv_start_v4l2_decode_stream(s
, 0);
533 rc
= 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 return ivtv_write_vbi_from_user(itv
,
574 (const struct v4l2_sliced_vbi_data __user
*)user_buf
, elems
);
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
.subscribed
)) {
726 poll_wait(filp
, &id
->fh
.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
);
755 /* Start a capture if there is none */
756 if (!eof
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
759 mutex_lock(&itv
->serialize_lock
);
760 rc
= ivtv_start_capture(id
);
761 mutex_unlock(&itv
->serialize_lock
);
763 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
767 IVTV_DEBUG_FILE("Encoder poll started capture\n");
770 /* add stream's waitq to the poll list */
771 IVTV_DEBUG_HI_FILE("Encoder poll\n");
772 poll_wait(filp
, &s
->waitq
, wait
);
773 if (v4l2_event_pending(&id
->fh
))
776 poll_wait(filp
, &id
->fh
.wait
, wait
);
778 if (s
->q_full
.length
|| s
->q_io
.length
)
779 return res
| POLLIN
| POLLRDNORM
;
781 return res
| POLLHUP
;
785 void ivtv_stop_capture(struct ivtv_open_id
*id
, int gop_end
)
787 struct ivtv
*itv
= id
->itv
;
788 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
790 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
792 /* 'Unclaim' this stream */
795 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
796 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
798 IVTV_DEBUG_INFO("close stopping capture\n");
799 /* Special case: a running VBI capture for VBI insertion
800 in the mpeg stream. Need to stop that too. */
801 if (id
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
802 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
) &&
803 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
804 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
805 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
807 if ((id
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
808 id
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
809 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
810 /* Also used internally, don't stop capturing */
814 ivtv_stop_v4l2_encode_stream(s
, gop_end
);
818 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
819 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
820 ivtv_release_stream(s
);
824 static void ivtv_stop_decoding(struct ivtv_open_id
*id
, int flags
, u64 pts
)
826 struct ivtv
*itv
= id
->itv
;
827 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
829 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
831 if (id
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
832 test_bit(IVTV_F_I_DECODING_YUV
, &itv
->i_flags
)) {
833 /* Restore registers we've changed & clean up any mess */
838 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
839 IVTV_DEBUG_INFO("close stopping decode\n");
841 ivtv_stop_v4l2_decode_stream(s
, flags
, pts
);
842 itv
->output_mode
= OUT_NONE
;
844 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
845 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
847 if (itv
->output_mode
== OUT_UDMA_YUV
&& id
->yuv_frames
)
848 itv
->output_mode
= OUT_NONE
;
851 clear_bit(IVTV_F_I_DEC_PAUSED
, &itv
->i_flags
);
852 ivtv_release_stream(s
);
855 int ivtv_v4l2_close(struct file
*filp
)
857 struct v4l2_fh
*fh
= filp
->private_data
;
858 struct ivtv_open_id
*id
= fh2id(fh
);
859 struct ivtv
*itv
= id
->itv
;
860 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
862 IVTV_DEBUG_FILE("close %s\n", s
->name
);
867 /* Easy case first: this stream was never claimed by us */
868 if (s
->id
!= id
->open_id
) {
873 /* 'Unclaim' this stream */
876 mutex_lock(&itv
->serialize_lock
);
877 if (id
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
878 /* Closing radio device, return to TV mode */
880 /* Mark that the radio is no longer in use */
881 clear_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
882 /* Switch tuner to TV */
883 ivtv_call_all(itv
, core
, s_std
, itv
->std
);
884 /* Select correct audio input (i.e. TV tuner or Line in) */
885 ivtv_audio_set_io(itv
);
886 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
887 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
888 SAA7115_FREQ_32_11_MHZ
, 0);
890 if (atomic_read(&itv
->capturing
) > 0) {
891 /* Undo video mute */
892 ivtv_vapi(itv
, CX2341X_ENC_MUTE_VIDEO
, 1,
893 v4l2_ctrl_g_ctrl(itv
->cxhdl
.video_mute
) |
894 (v4l2_ctrl_g_ctrl(itv
->cxhdl
.video_mute_yuv
) << 8));
896 /* Done! Unmute and continue. */
898 ivtv_release_stream(s
);
899 } else if (s
->type
>= IVTV_DEC_STREAM_TYPE_MPG
) {
900 struct ivtv_stream
*s_vout
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VOUT
];
902 ivtv_stop_decoding(id
, VIDEO_CMD_STOP_TO_BLACK
| VIDEO_CMD_STOP_IMMEDIATELY
, 0);
904 /* If all output streams are closed, and if the user doesn't have
905 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
906 if (itv
->output_mode
== OUT_NONE
&& !test_bit(IVTV_F_S_APPL_IO
, &s_vout
->s_flags
)) {
907 /* disable CC on TV-out */
908 ivtv_disable_cc(itv
);
911 ivtv_stop_capture(id
, 0);
914 mutex_unlock(&itv
->serialize_lock
);
918 static int ivtv_serialized_open(struct ivtv_stream
*s
, struct file
*filp
)
920 #ifdef CONFIG_VIDEO_ADV_DEBUG
921 struct video_device
*vdev
= video_devdata(filp
);
923 struct ivtv
*itv
= s
->itv
;
924 struct ivtv_open_id
*item
;
927 IVTV_DEBUG_FILE("open %s\n", s
->name
);
929 #ifdef CONFIG_VIDEO_ADV_DEBUG
930 /* Unless ivtv_fw_debug is set, error out if firmware dead. */
932 IVTV_WARN("Opening %s with dead firmware lockout disabled\n",
933 video_device_node_name(vdev
));
934 IVTV_WARN("Selected firmware errors will be ignored\n");
939 res
= ivtv_firmware_check(itv
, "ivtv_serialized_open");
941 res
= ivtv_firmware_check(itv
, "ivtv_serialized_open");
946 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
&&
947 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_YUV
].s_flags
))
950 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
951 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_MPG
].s_flags
))
954 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
955 if (read_reg(0x82c) == 0) {
956 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
957 /* return -ENODEV; */
959 ivtv_udma_alloc(itv
);
962 /* Allocate memory */
963 item
= kzalloc(sizeof(struct ivtv_open_id
), GFP_KERNEL
);
965 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
968 v4l2_fh_init(&item
->fh
, s
->vdev
);
970 v4l2_fh_exit(&item
->fh
);
975 item
->type
= s
->type
;
977 item
->open_id
= itv
->open_id
++;
978 filp
->private_data
= &item
->fh
;
980 if (item
->type
== IVTV_ENC_STREAM_TYPE_RAD
) {
981 /* Try to claim this stream */
982 if (ivtv_claim_stream(item
, item
->type
)) {
983 /* No, it's already in use */
984 v4l2_fh_exit(&item
->fh
);
989 if (!test_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
)) {
990 if (atomic_read(&itv
->capturing
) > 0) {
991 /* switching to radio while capture is
992 in progress is not polite */
993 ivtv_release_stream(s
);
994 v4l2_fh_exit(&item
->fh
);
999 /* Mark that the radio is being used. */
1000 set_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
1001 /* We have the radio */
1003 /* Switch tuner to radio */
1004 ivtv_call_all(itv
, tuner
, s_radio
);
1005 /* Select the correct audio input (i.e. radio tuner) */
1006 ivtv_audio_set_io(itv
);
1007 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
1008 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
1009 SAA7115_FREQ_32_11_MHZ
, SAA7115_FREQ_FL_APLL
);
1011 /* Done! Unmute and continue. */
1015 /* YUV or MPG Decoding Mode? */
1016 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
) {
1017 clear_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
1018 } else if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
1019 set_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
1020 /* For yuv, we need to know the dma size before we start */
1021 itv
->dma_data_req_size
=
1022 1080 * ((itv
->yuv_info
.v4l2_src_h
+ 31) & ~31);
1023 itv
->yuv_info
.stream_size
= 0;
1025 v4l2_fh_add(&item
->fh
);
1029 int ivtv_v4l2_open(struct file
*filp
)
1032 struct ivtv
*itv
= NULL
;
1033 struct ivtv_stream
*s
= NULL
;
1034 struct video_device
*vdev
= video_devdata(filp
);
1036 s
= video_get_drvdata(vdev
);
1039 mutex_lock(&itv
->serialize_lock
);
1040 if (ivtv_init_on_first_open(itv
)) {
1041 IVTV_ERR("Failed to initialize on device %s\n",
1042 video_device_node_name(vdev
));
1043 mutex_unlock(&itv
->serialize_lock
);
1046 res
= ivtv_serialized_open(s
, filp
);
1047 mutex_unlock(&itv
->serialize_lock
);
1051 void ivtv_mute(struct ivtv
*itv
)
1053 if (atomic_read(&itv
->capturing
))
1054 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 1);
1055 IVTV_DEBUG_INFO("Mute\n");
1058 void ivtv_unmute(struct ivtv
*itv
)
1060 if (atomic_read(&itv
->capturing
)) {
1061 ivtv_msleep_timeout(100, 0);
1062 ivtv_vapi(itv
, CX2341X_ENC_MISC
, 1, 12);
1063 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 0);
1065 IVTV_DEBUG_INFO("Unmute\n");