1 // SPDX-License-Identifier: GPL-2.0-or-later
3 file operation functions
4 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
5 Copyright (C) 2004 Chris Kennedy <c@groovy.org>
6 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
10 #include "ivtv-driver.h"
11 #include "ivtv-fileops.h"
13 #include "ivtv-queue.h"
14 #include "ivtv-udma.h"
17 #include "ivtv-mailbox.h"
18 #include "ivtv-routing.h"
19 #include "ivtv-streams.h"
21 #include "ivtv-ioctl.h"
22 #include "ivtv-cards.h"
23 #include "ivtv-firmware.h"
24 #include <linux/lockdep.h>
25 #include <media/v4l2-event.h>
26 #include <media/i2c/saa7115.h>
28 /* This function tries to claim the stream for a specific file descriptor.
29 If no one else is using this stream then the stream is claimed and
30 associated VBI streams are also automatically claimed.
31 Possible error returns: -EBUSY if someone else has claimed
32 the stream or 0 on success. */
33 int ivtv_claim_stream(struct ivtv_open_id
*id
, int type
)
35 struct ivtv
*itv
= id
->itv
;
36 struct ivtv_stream
*s
= &itv
->streams
[type
];
37 struct ivtv_stream
*s_vbi
;
40 if (test_and_set_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
41 /* someone already claimed this stream */
42 if (s
->fh
== &id
->fh
) {
43 /* yes, this file descriptor did. So that's OK. */
46 if (s
->fh
== NULL
&& (type
== IVTV_DEC_STREAM_TYPE_VBI
||
47 type
== IVTV_ENC_STREAM_TYPE_VBI
)) {
48 /* VBI is handled already internally, now also assign
49 the file descriptor to this stream for external
50 reading of the stream. */
52 IVTV_DEBUG_INFO("Start Read VBI\n");
55 /* someone else is using this stream already */
56 IVTV_DEBUG_INFO("Stream %d is busy\n", type
);
60 if (type
== IVTV_DEC_STREAM_TYPE_VBI
) {
61 /* Enable reinsertion interrupt */
62 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
65 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
66 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
67 (provided VBI insertion is on and sliced VBI is selected), for all
68 other streams we're done */
69 if (type
== IVTV_DEC_STREAM_TYPE_MPG
) {
70 vbi_type
= IVTV_DEC_STREAM_TYPE_VBI
;
71 } else if (type
== IVTV_ENC_STREAM_TYPE_MPG
&&
72 itv
->vbi
.insert_mpeg
&& !ivtv_raw_vbi(itv
)) {
73 vbi_type
= IVTV_ENC_STREAM_TYPE_VBI
;
77 s_vbi
= &itv
->streams
[vbi_type
];
79 if (!test_and_set_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
)) {
80 /* Enable reinsertion interrupt */
81 if (vbi_type
== IVTV_DEC_STREAM_TYPE_VBI
)
82 ivtv_clear_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
84 /* mark that it is used internally */
85 set_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
);
88 EXPORT_SYMBOL(ivtv_claim_stream
);
90 /* This function releases a previously claimed stream. It will take into
91 account associated VBI streams. */
92 void ivtv_release_stream(struct ivtv_stream
*s
)
94 struct ivtv
*itv
= s
->itv
;
95 struct ivtv_stream
*s_vbi
;
98 if ((s
->type
== IVTV_DEC_STREAM_TYPE_VBI
|| s
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
99 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
100 /* this stream is still in use internally */
103 if (!test_and_clear_bit(IVTV_F_S_CLAIMED
, &s
->s_flags
)) {
104 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s
->name
);
108 ivtv_flush_queues(s
);
110 /* disable reinsertion interrupt */
111 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
112 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
114 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI,
115 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI,
116 for all other streams we're done */
117 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
118 s_vbi
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VBI
];
119 else if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
120 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
124 /* clear internal use flag */
125 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
)) {
126 /* was already cleared */
130 /* VBI stream still claimed by a file descriptor */
133 /* disable reinsertion interrupt */
134 if (s_vbi
->type
== IVTV_DEC_STREAM_TYPE_VBI
)
135 ivtv_set_irq_mask(itv
, IVTV_IRQ_DEC_VBI_RE_INSERT
);
136 clear_bit(IVTV_F_S_CLAIMED
, &s_vbi
->s_flags
);
137 ivtv_flush_queues(s_vbi
);
139 EXPORT_SYMBOL(ivtv_release_stream
);
141 static void ivtv_dualwatch(struct ivtv
*itv
)
143 struct v4l2_tuner vt
;
145 const u32 dual
= 0x02;
147 new_stereo_mode
= v4l2_ctrl_g_ctrl(itv
->cxhdl
.audio_mode
);
148 memset(&vt
, 0, sizeof(vt
));
149 ivtv_call_all(itv
, tuner
, g_tuner
, &vt
);
150 if (vt
.audmode
== V4L2_TUNER_MODE_LANG1_LANG2
&& (vt
.rxsubchans
& V4L2_TUNER_SUB_LANG2
))
151 new_stereo_mode
= dual
;
153 if (new_stereo_mode
== itv
->dualwatch_stereo_mode
)
156 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n",
157 itv
->dualwatch_stereo_mode
, new_stereo_mode
);
158 if (v4l2_ctrl_s_ctrl(itv
->cxhdl
.audio_mode
, new_stereo_mode
))
159 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
162 static void ivtv_update_pgm_info(struct ivtv
*itv
)
164 u32 wr_idx
= (read_enc(itv
->pgm_info_offset
) - itv
->pgm_info_offset
- 4) / 24;
168 if (wr_idx
>= itv
->pgm_info_num
) {
169 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx
, itv
->pgm_info_num
);
172 cnt
= (wr_idx
+ itv
->pgm_info_num
- itv
->pgm_info_write_idx
) % itv
->pgm_info_num
;
174 int idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
175 struct v4l2_enc_idx_entry
*e
= itv
->pgm_info
+ idx
;
176 u32 addr
= itv
->pgm_info_offset
+ 4 + idx
* 24;
177 const int mapping
[8] = { -1, V4L2_ENC_IDX_FRAME_I
, V4L2_ENC_IDX_FRAME_P
, -1,
178 V4L2_ENC_IDX_FRAME_B
, -1, -1, -1 };
181 e
->offset
= read_enc(addr
+ 4) + ((u64
)read_enc(addr
+ 8) << 32);
182 if (e
->offset
> itv
->mpg_data_received
) {
185 e
->offset
+= itv
->vbi_data_inserted
;
186 e
->length
= read_enc(addr
);
187 e
->pts
= read_enc(addr
+ 16) + ((u64
)(read_enc(addr
+ 20) & 1) << 32);
188 e
->flags
= mapping
[read_enc(addr
+ 12) & 7];
191 itv
->pgm_info_write_idx
= (itv
->pgm_info_write_idx
+ i
) % itv
->pgm_info_num
;
194 static void ivtv_schedule(struct ivtv_stream
*s
)
196 struct ivtv
*itv
= s
->itv
;
199 lockdep_assert_held(&itv
->serialize_lock
);
201 mutex_unlock(&itv
->serialize_lock
);
202 prepare_to_wait(&s
->waitq
, &wait
, TASK_INTERRUPTIBLE
);
203 /* New buffers might have become free before we were added to the waitqueue */
204 if (!s
->q_free
.buffers
)
206 finish_wait(&s
->waitq
, &wait
);
207 mutex_lock(&itv
->serialize_lock
);
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
;
218 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
) {
219 /* Process pending program info updates and pending VBI data */
220 ivtv_update_pgm_info(itv
);
222 if (time_after(jiffies
,
223 itv
->dualwatch_jiffies
+
224 msecs_to_jiffies(1000))) {
225 itv
->dualwatch_jiffies
= jiffies
;
229 if (test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
230 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
231 while ((buf
= ivtv_dequeue(s_vbi
, &s_vbi
->q_full
))) {
232 /* byteswap and process VBI data */
233 ivtv_process_vbi_data(itv
, buf
, s_vbi
->dma_pts
, s_vbi
->type
);
234 ivtv_enqueue(s_vbi
, buf
, &s_vbi
->q_free
);
237 buf
= &itv
->vbi
.sliced_mpeg_buf
;
238 if (buf
->readpos
!= buf
->bytesused
) {
243 /* do we have leftover data? */
244 buf
= ivtv_dequeue(s
, &s
->q_io
);
248 /* do we have new data? */
249 buf
= ivtv_dequeue(s
, &s
->q_full
);
251 if ((buf
->b_flags
& IVTV_F_B_NEED_BUF_SWAP
) == 0)
253 buf
->b_flags
&= ~IVTV_F_B_NEED_BUF_SWAP
;
254 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
)
255 /* byteswap MPG data */
257 else if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
) {
258 /* byteswap and process VBI data */
259 ivtv_process_vbi_data(itv
, buf
, s
->dma_pts
, s
->type
);
264 /* return if end of stream */
265 if (s
->type
!= IVTV_DEC_STREAM_TYPE_VBI
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
266 IVTV_DEBUG_INFO("EOS %s\n", s
->name
);
270 /* return if file was opened with O_NONBLOCK */
276 /* wait for more data to arrive */
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 !ivtv_raw_vbi(itv
) && 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
->fh
== NULL
) {
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
&& !ivtv_raw_vbi(itv
)))
375 struct ivtv_buffer
*buf
;
378 buf
= ivtv_get_buffer(s
, non_block
, &rc
);
379 /* if there is no data available... */
381 /* if we got data, then return that regardless */
386 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
387 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
388 ivtv_release_stream(s
);
393 rc
= ivtv_copy_buf_to_user(s
, buf
, ubuf
+ tot_written
, tot_count
- tot_written
);
394 if (buf
!= &itv
->vbi
.sliced_mpeg_buf
) {
395 ivtv_enqueue(s
, buf
, (buf
->readpos
== buf
->bytesused
) ? &s
->q_free
: &s
->q_io
);
397 else if (buf
->readpos
== buf
->bytesused
) {
398 int idx
= itv
->vbi
.inserted_frame
% IVTV_VBI_FRAMES
;
399 itv
->vbi
.sliced_mpeg_size
[idx
] = 0;
400 itv
->vbi
.inserted_frame
++;
401 itv
->vbi_data_inserted
+= buf
->bytesused
;
407 if (tot_written
== tot_count
|| single_frame
)
413 static ssize_t
ivtv_read_pos(struct ivtv_stream
*s
, char __user
*ubuf
, size_t count
,
414 loff_t
*pos
, int non_block
)
416 ssize_t rc
= count
? ivtv_read(s
, ubuf
, count
, non_block
) : 0;
417 struct ivtv
*itv
= s
->itv
;
419 IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count
, s
->name
, rc
);
425 int ivtv_start_capture(struct ivtv_open_id
*id
)
427 struct ivtv
*itv
= id
->itv
;
428 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
429 struct ivtv_stream
*s_vbi
;
431 if (s
->type
== IVTV_ENC_STREAM_TYPE_RAD
||
432 s
->type
== IVTV_DEC_STREAM_TYPE_MPG
||
433 s
->type
== IVTV_DEC_STREAM_TYPE_YUV
||
434 s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
435 /* you cannot read from these stream types. */
439 /* Try to claim this stream. */
440 if (ivtv_claim_stream(id
, s
->type
))
443 /* This stream does not need to start capturing */
444 if (s
->type
== IVTV_DEC_STREAM_TYPE_VBI
) {
445 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
449 /* If capture is already in progress, then we also have to
451 if (test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
) || test_and_set_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
452 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
456 /* Start VBI capture if required */
457 s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
458 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
459 test_bit(IVTV_F_S_INTERNAL_USE
, &s_vbi
->s_flags
) &&
460 !test_and_set_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
461 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
462 automatically when the MPG stream is claimed.
463 We only need to start the VBI capturing. */
464 if (ivtv_start_v4l2_encode_stream(s_vbi
)) {
465 IVTV_DEBUG_WARN("VBI capture start failed\n");
467 /* Failure, clean up and return an error */
468 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
469 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
470 /* also releases the associated VBI stream */
471 ivtv_release_stream(s
);
474 IVTV_DEBUG_INFO("VBI insertion started\n");
477 /* Tell the card to start capturing */
478 if (!ivtv_start_v4l2_encode_stream(s
)) {
480 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
481 /* Resume a possibly paused encoder */
482 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED
, &itv
->i_flags
))
483 ivtv_vapi(itv
, CX2341X_ENC_PAUSE_ENCODER
, 1, 1);
487 /* failure, clean up */
488 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s
->name
);
490 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
491 automatically when the MPG stream is released.
492 We only need to stop the VBI capturing. */
493 if (s
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
494 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
)) {
495 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
496 clear_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
);
498 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
499 ivtv_release_stream(s
);
503 ssize_t
ivtv_v4l2_read(struct file
* filp
, char __user
*buf
, size_t count
, loff_t
* pos
)
505 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
506 struct ivtv
*itv
= id
->itv
;
507 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
510 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count
, s
->name
);
512 if (mutex_lock_interruptible(&itv
->serialize_lock
))
514 rc
= ivtv_start_capture(id
);
516 rc
= ivtv_read_pos(s
, buf
, count
, pos
, filp
->f_flags
& O_NONBLOCK
);
517 mutex_unlock(&itv
->serialize_lock
);
521 int ivtv_start_decoding(struct ivtv_open_id
*id
, int speed
)
523 struct ivtv
*itv
= id
->itv
;
524 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
527 if (atomic_read(&itv
->decoding
) == 0) {
528 if (ivtv_claim_stream(id
, s
->type
)) {
529 /* someone else is using this stream already */
530 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
533 rc
= ivtv_start_v4l2_decode_stream(s
, 0);
536 rc
= ivtv_start_v4l2_decode_stream(s
, 0);
541 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
542 return ivtv_set_speed(itv
, speed
);
546 static int ivtv_schedule_dma(struct ivtv_stream
*s
)
548 struct ivtv
*itv
= s
->itv
;
552 lockdep_assert_held(&itv
->serialize_lock
);
554 mutex_unlock(&itv
->serialize_lock
);
555 prepare_to_wait(&itv
->dma_waitq
, &wait
, TASK_INTERRUPTIBLE
);
556 while (!(got_sig
= signal_pending(current
)) &&
557 test_bit(IVTV_F_S_DMA_PENDING
, &s
->s_flags
))
559 finish_wait(&itv
->dma_waitq
, &wait
);
560 mutex_lock(&itv
->serialize_lock
);
565 static ssize_t
ivtv_write(struct file
*filp
, const char __user
*user_buf
, size_t count
, loff_t
*pos
)
567 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
568 struct ivtv
*itv
= id
->itv
;
569 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
570 struct yuv_playback_info
*yi
= &itv
->yuv_info
;
571 struct ivtv_buffer
*buf
;
573 int bytes_written
= 0;
577 IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count
, s
->name
);
579 if (s
->type
!= IVTV_DEC_STREAM_TYPE_MPG
&&
580 s
->type
!= IVTV_DEC_STREAM_TYPE_YUV
&&
581 s
->type
!= IVTV_DEC_STREAM_TYPE_VOUT
)
582 /* not decoder streams */
585 /* Try to claim this stream */
586 if (ivtv_claim_stream(id
, s
->type
))
589 /* This stream does not need to start any decoding */
590 if (s
->type
== IVTV_DEC_STREAM_TYPE_VOUT
) {
591 int elems
= count
/ sizeof(struct v4l2_sliced_vbi_data
);
593 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
594 return ivtv_write_vbi_from_user(itv
,
595 (const struct v4l2_sliced_vbi_data __user
*)user_buf
, elems
);
598 mode
= s
->type
== IVTV_DEC_STREAM_TYPE_MPG
? OUT_MPG
: OUT_YUV
;
600 if (ivtv_set_output_mode(itv
, mode
) != mode
) {
601 ivtv_release_stream(s
);
605 set_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
607 /* Start decoder (returns 0 if already started) */
608 rc
= ivtv_start_decoding(id
, itv
->speed
);
610 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s
->name
);
612 /* failure, clean up */
613 clear_bit(IVTV_F_S_STREAMING
, &s
->s_flags
);
614 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
619 /* If possible, just DMA the entire frame - Check the data transfer size
620 since we may get here before the stream has been fully set-up */
621 if (mode
== OUT_YUV
&& s
->q_full
.length
== 0 && itv
->dma_data_req_size
) {
622 while (count
>= itv
->dma_data_req_size
) {
623 rc
= ivtv_yuv_udma_stream_frame(itv
, (void __user
*)user_buf
);
628 bytes_written
+= itv
->dma_data_req_size
;
629 user_buf
+= itv
->dma_data_req_size
;
630 count
-= itv
->dma_data_req_size
;
633 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written
, s
->name
, s
->q_full
.bytesused
);
634 return bytes_written
;
640 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_io
)))
641 ivtv_enqueue(s
, buf
, &q
);
642 while (q
.length
- q
.bytesused
< count
&& (buf
= ivtv_dequeue(s
, &s
->q_free
))) {
643 ivtv_enqueue(s
, buf
, &q
);
647 if (filp
->f_flags
& O_NONBLOCK
)
650 if (signal_pending(current
)) {
651 IVTV_DEBUG_INFO("User stopped %s\n", s
->name
);
656 /* copy user data into buffers */
657 while ((buf
= ivtv_dequeue(s
, &q
))) {
658 /* yuv is a pain. Don't copy more data than needed for a single
659 frame, otherwise we lose sync with the incoming stream */
660 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
661 yi
->stream_size
+ count
> itv
->dma_data_req_size
)
662 rc
= ivtv_buf_copy_from_user(s
, buf
, user_buf
,
663 itv
->dma_data_req_size
- yi
->stream_size
);
665 rc
= ivtv_buf_copy_from_user(s
, buf
, user_buf
, count
);
667 /* Make sure we really got all the user data */
669 ivtv_queue_move(s
, &q
, NULL
, &s
->q_free
, 0);
676 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
677 yi
->stream_size
+= rc
;
678 /* If we have a complete yuv frame, break loop now */
679 if (yi
->stream_size
== itv
->dma_data_req_size
) {
680 ivtv_enqueue(s
, buf
, &s
->q_full
);
686 if (buf
->bytesused
!= s
->buf_size
) {
687 /* incomplete, leave in q_io for next time */
688 ivtv_enqueue(s
, buf
, &s
->q_io
);
691 /* Byteswap MPEG buffer */
692 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
)
694 ivtv_enqueue(s
, buf
, &s
->q_full
);
697 if (test_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
)) {
698 if (s
->q_full
.length
>= itv
->dma_data_req_size
) {
700 ivtv_yuv_setup_stream_frame(itv
);
702 if (ivtv_schedule_dma(s
)) {
703 IVTV_DEBUG_INFO("User interrupted %s\n", s
->name
);
707 clear_bit(IVTV_F_S_NEEDS_DATA
, &s
->s_flags
);
708 ivtv_queue_move(s
, &s
->q_full
, NULL
, &s
->q_predma
, itv
->dma_data_req_size
);
709 ivtv_dma_stream_dec_prepare(s
, itv
->dma_data_req_offset
+ IVTV_DECODER_OFFSET
, 1);
712 /* more user data is available, wait until buffers become free
713 to transfer the rest. */
714 if (count
&& !(filp
->f_flags
& O_NONBLOCK
))
716 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written
, s
->name
, s
->q_full
.bytesused
);
717 return bytes_written
;
720 ssize_t
ivtv_v4l2_write(struct file
*filp
, const char __user
*user_buf
, size_t count
, loff_t
*pos
)
722 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
723 struct ivtv
*itv
= id
->itv
;
726 if (mutex_lock_interruptible(&itv
->serialize_lock
))
728 res
= ivtv_write(filp
, user_buf
, count
, pos
);
729 mutex_unlock(&itv
->serialize_lock
);
733 __poll_t
ivtv_v4l2_dec_poll(struct file
*filp
, poll_table
*wait
)
735 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
736 struct ivtv
*itv
= id
->itv
;
737 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
740 /* add stream's waitq to the poll list */
741 IVTV_DEBUG_HI_FILE("Decoder poll\n");
743 /* If there are subscribed events, then only use the new event
744 API instead of the old video.h based API. */
745 if (!list_empty(&id
->fh
.subscribed
)) {
746 poll_wait(filp
, &id
->fh
.wait
, wait
);
747 /* Turn off the old-style vsync events */
748 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED
, &itv
->i_flags
);
749 if (v4l2_event_pending(&id
->fh
))
752 /* This is the old-style API which is here only for backwards
754 poll_wait(filp
, &s
->waitq
, wait
);
755 set_bit(IVTV_F_I_EV_VSYNC_ENABLED
, &itv
->i_flags
);
756 if (test_bit(IVTV_F_I_EV_VSYNC
, &itv
->i_flags
) ||
757 test_bit(IVTV_F_I_EV_DEC_STOPPED
, &itv
->i_flags
))
761 /* Allow write if buffers are available for writing */
762 if (s
->q_free
.buffers
)
763 res
|= EPOLLOUT
| EPOLLWRNORM
;
767 __poll_t
ivtv_v4l2_enc_poll(struct file
*filp
, poll_table
*wait
)
769 __poll_t req_events
= poll_requested_events(wait
);
770 struct ivtv_open_id
*id
= fh2id(filp
->private_data
);
771 struct ivtv
*itv
= id
->itv
;
772 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
773 int eof
= test_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
776 /* Start a capture if there is none */
777 if (!eof
&& !test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
) &&
778 s
->type
!= IVTV_ENC_STREAM_TYPE_RAD
&&
779 (req_events
& (EPOLLIN
| EPOLLRDNORM
))) {
782 mutex_lock(&itv
->serialize_lock
);
783 rc
= ivtv_start_capture(id
);
784 mutex_unlock(&itv
->serialize_lock
);
786 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
790 IVTV_DEBUG_FILE("Encoder poll started capture\n");
793 /* add stream's waitq to the poll list */
794 IVTV_DEBUG_HI_FILE("Encoder poll\n");
795 poll_wait(filp
, &s
->waitq
, wait
);
796 if (v4l2_event_pending(&id
->fh
))
799 poll_wait(filp
, &id
->fh
.wait
, wait
);
801 if (s
->q_full
.length
|| s
->q_io
.length
)
802 return res
| EPOLLIN
| EPOLLRDNORM
;
804 return res
| EPOLLHUP
;
808 void ivtv_stop_capture(struct ivtv_open_id
*id
, int gop_end
)
810 struct ivtv
*itv
= id
->itv
;
811 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
813 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
815 /* 'Unclaim' this stream */
818 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
819 struct ivtv_stream
*s_vbi
= &itv
->streams
[IVTV_ENC_STREAM_TYPE_VBI
];
821 IVTV_DEBUG_INFO("close stopping capture\n");
822 /* Special case: a running VBI capture for VBI insertion
823 in the mpeg stream. Need to stop that too. */
824 if (id
->type
== IVTV_ENC_STREAM_TYPE_MPG
&&
825 test_bit(IVTV_F_S_STREAMING
, &s_vbi
->s_flags
) &&
826 !test_bit(IVTV_F_S_APPL_IO
, &s_vbi
->s_flags
)) {
827 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
828 ivtv_stop_v4l2_encode_stream(s_vbi
, 0);
830 if ((id
->type
== IVTV_DEC_STREAM_TYPE_VBI
||
831 id
->type
== IVTV_ENC_STREAM_TYPE_VBI
) &&
832 test_bit(IVTV_F_S_INTERNAL_USE
, &s
->s_flags
)) {
833 /* Also used internally, don't stop capturing */
837 ivtv_stop_v4l2_encode_stream(s
, gop_end
);
841 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
842 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
843 ivtv_release_stream(s
);
847 static void ivtv_stop_decoding(struct ivtv_open_id
*id
, int flags
, u64 pts
)
849 struct ivtv
*itv
= id
->itv
;
850 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
852 IVTV_DEBUG_FILE("close() of %s\n", s
->name
);
854 if (id
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
855 test_bit(IVTV_F_I_DECODING_YUV
, &itv
->i_flags
)) {
856 /* Restore registers we've changed & clean up any mess */
861 if (test_bit(IVTV_F_S_STREAMING
, &s
->s_flags
)) {
862 IVTV_DEBUG_INFO("close stopping decode\n");
864 ivtv_stop_v4l2_decode_stream(s
, flags
, pts
);
865 itv
->output_mode
= OUT_NONE
;
867 clear_bit(IVTV_F_S_APPL_IO
, &s
->s_flags
);
868 clear_bit(IVTV_F_S_STREAMOFF
, &s
->s_flags
);
870 if (itv
->output_mode
== OUT_UDMA_YUV
&& id
->yuv_frames
)
871 itv
->output_mode
= OUT_NONE
;
874 clear_bit(IVTV_F_I_DEC_PAUSED
, &itv
->i_flags
);
875 ivtv_release_stream(s
);
878 int ivtv_v4l2_close(struct file
*filp
)
880 struct v4l2_fh
*fh
= filp
->private_data
;
881 struct ivtv_open_id
*id
= fh2id(fh
);
882 struct ivtv
*itv
= id
->itv
;
883 struct ivtv_stream
*s
= &itv
->streams
[id
->type
];
885 IVTV_DEBUG_FILE("close %s\n", s
->name
);
887 mutex_lock(&itv
->serialize_lock
);
890 if (id
->type
== IVTV_ENC_STREAM_TYPE_RAD
&&
891 v4l2_fh_is_singular_file(filp
)) {
892 /* Closing radio device, return to TV mode */
894 /* Mark that the radio is no longer in use */
895 clear_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
896 /* Switch tuner to TV */
897 ivtv_call_all(itv
, video
, s_std
, itv
->std
);
898 /* Select correct audio input (i.e. TV tuner or Line in) */
899 ivtv_audio_set_io(itv
);
900 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
901 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
902 SAA7115_FREQ_32_11_MHZ
, 0);
904 if (atomic_read(&itv
->capturing
) > 0) {
905 /* Undo video mute */
906 ivtv_vapi(itv
, CX2341X_ENC_MUTE_VIDEO
, 1,
907 v4l2_ctrl_g_ctrl(itv
->cxhdl
.video_mute
) |
908 (v4l2_ctrl_g_ctrl(itv
->cxhdl
.video_mute_yuv
) << 8));
910 /* Done! Unmute and continue. */
917 /* Easy case first: this stream was never claimed by us */
918 if (s
->fh
!= &id
->fh
)
921 /* 'Unclaim' this stream */
923 if (s
->type
>= IVTV_DEC_STREAM_TYPE_MPG
) {
924 struct ivtv_stream
*s_vout
= &itv
->streams
[IVTV_DEC_STREAM_TYPE_VOUT
];
926 ivtv_stop_decoding(id
, V4L2_DEC_CMD_STOP_TO_BLACK
| V4L2_DEC_CMD_STOP_IMMEDIATELY
, 0);
928 /* If all output streams are closed, and if the user doesn't have
929 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
930 if (itv
->output_mode
== OUT_NONE
&& !test_bit(IVTV_F_S_APPL_IO
, &s_vout
->s_flags
)) {
931 /* disable CC on TV-out */
932 ivtv_disable_cc(itv
);
935 ivtv_stop_capture(id
, 0);
939 mutex_unlock(&itv
->serialize_lock
);
943 static int ivtv_open(struct file
*filp
)
945 struct video_device
*vdev
= video_devdata(filp
);
946 struct ivtv_stream
*s
= video_get_drvdata(vdev
);
947 struct ivtv
*itv
= s
->itv
;
948 struct ivtv_open_id
*item
;
951 IVTV_DEBUG_FILE("open %s\n", s
->name
);
953 if (ivtv_init_on_first_open(itv
)) {
954 IVTV_ERR("Failed to initialize on device %s\n",
955 video_device_node_name(vdev
));
959 #ifdef CONFIG_VIDEO_ADV_DEBUG
960 /* Unless ivtv_fw_debug is set, error out if firmware dead. */
962 IVTV_WARN("Opening %s with dead firmware lockout disabled\n",
963 video_device_node_name(vdev
));
964 IVTV_WARN("Selected firmware errors will be ignored\n");
969 res
= ivtv_firmware_check(itv
, "ivtv_serialized_open");
971 res
= ivtv_firmware_check(itv
, "ivtv_serialized_open");
976 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
&&
977 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_YUV
].s_flags
))
980 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
&&
981 test_bit(IVTV_F_S_CLAIMED
, &itv
->streams
[IVTV_DEC_STREAM_TYPE_MPG
].s_flags
))
984 if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
985 if (read_reg(0x82c) == 0) {
986 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
987 /* return -ENODEV; */
989 ivtv_udma_alloc(itv
);
992 /* Allocate memory */
993 item
= kzalloc(sizeof(struct ivtv_open_id
), GFP_KERNEL
);
995 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
998 v4l2_fh_init(&item
->fh
, &s
->vdev
);
1000 item
->type
= s
->type
;
1002 filp
->private_data
= &item
->fh
;
1003 v4l2_fh_add(&item
->fh
);
1005 if (item
->type
== IVTV_ENC_STREAM_TYPE_RAD
&&
1006 v4l2_fh_is_singular_file(filp
)) {
1007 if (!test_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
)) {
1008 if (atomic_read(&itv
->capturing
) > 0) {
1009 /* switching to radio while capture is
1010 in progress is not polite */
1011 v4l2_fh_del(&item
->fh
);
1012 v4l2_fh_exit(&item
->fh
);
1017 /* Mark that the radio is being used. */
1018 set_bit(IVTV_F_I_RADIO_USER
, &itv
->i_flags
);
1019 /* We have the radio */
1021 /* Switch tuner to radio */
1022 ivtv_call_all(itv
, tuner
, s_radio
);
1023 /* Select the correct audio input (i.e. radio tuner) */
1024 ivtv_audio_set_io(itv
);
1025 if (itv
->hw_flags
& IVTV_HW_SAA711X
) {
1026 ivtv_call_hw(itv
, IVTV_HW_SAA711X
, video
, s_crystal_freq
,
1027 SAA7115_FREQ_32_11_MHZ
, SAA7115_FREQ_FL_APLL
);
1029 /* Done! Unmute and continue. */
1033 /* YUV or MPG Decoding Mode? */
1034 if (s
->type
== IVTV_DEC_STREAM_TYPE_MPG
) {
1035 clear_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
1036 } else if (s
->type
== IVTV_DEC_STREAM_TYPE_YUV
) {
1037 set_bit(IVTV_F_I_DEC_YUV
, &itv
->i_flags
);
1038 /* For yuv, we need to know the dma size before we start */
1039 itv
->dma_data_req_size
=
1040 1080 * ((itv
->yuv_info
.v4l2_src_h
+ 31) & ~31);
1041 itv
->yuv_info
.stream_size
= 0;
1046 int ivtv_v4l2_open(struct file
*filp
)
1048 struct video_device
*vdev
= video_devdata(filp
);
1051 if (mutex_lock_interruptible(vdev
->lock
))
1052 return -ERESTARTSYS
;
1053 res
= ivtv_open(filp
);
1054 mutex_unlock(vdev
->lock
);
1058 void ivtv_mute(struct ivtv
*itv
)
1060 if (atomic_read(&itv
->capturing
))
1061 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 1);
1062 IVTV_DEBUG_INFO("Mute\n");
1065 void ivtv_unmute(struct ivtv
*itv
)
1067 if (atomic_read(&itv
->capturing
)) {
1068 ivtv_msleep_timeout(100, 0);
1069 ivtv_vapi(itv
, CX2341X_ENC_MISC
, 1, 12);
1070 ivtv_vapi(itv
, CX2341X_ENC_MUTE_AUDIO
, 1, 0);
1072 IVTV_DEBUG_INFO("Unmute\n");