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);
827 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
828 IVTV_DEBUG_INFO("close stopping decode\n");
830 ivtv_stop_v4l2_decode_stream(s, flags, pts);
831 itv->output_mode = OUT_NONE;
833 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
834 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
835 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) {
836 /* Restore registers we've changed & clean up any mess we've made */
839 if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames)
840 itv->output_mode = OUT_NONE;
843 clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);
844 ivtv_release_stream(s);
847 int ivtv_v4l2_close(struct file *filp)
849 struct v4l2_fh *fh = filp->private_data;
850 struct ivtv_open_id *id = fh2id(fh);
851 struct ivtv *itv = id->itv;
852 struct ivtv_stream *s = &itv->streams[id->type];
854 IVTV_DEBUG_FILE("close %s\n", s->name);
856 v4l2_prio_close(&itv->prio, id->prio);
860 /* Easy case first: this stream was never claimed by us */
861 if (s->id != id->open_id) {
866 /* 'Unclaim' this stream */
869 mutex_lock(&itv->serialize_lock);
870 if (id->type == IVTV_ENC_STREAM_TYPE_RAD) {
871 /* Closing radio device, return to TV mode */
873 /* Mark that the radio is no longer in use */
874 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
875 /* Switch tuner to TV */
876 ivtv_call_all(itv, core, s_std, itv->std);
877 /* Select correct audio input (i.e. TV tuner or Line in) */
878 ivtv_audio_set_io(itv);
879 if (itv->hw_flags & IVTV_HW_SAA711X) {
880 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
881 SAA7115_FREQ_32_11_MHZ, 0);
883 if (atomic_read(&itv->capturing) > 0) {
884 /* Undo video mute */
885 ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1,
886 itv->params.video_mute | (itv->params.video_mute_yuv << 8));
888 /* Done! Unmute and continue. */
890 ivtv_release_stream(s);
891 } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) {
892 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT];
894 ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0);
896 /* If all output streams are closed, and if the user doesn't have
897 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
898 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) {
899 /* disable CC on TV-out */
900 ivtv_disable_cc(itv);
903 ivtv_stop_capture(id, 0);
906 mutex_unlock(&itv->serialize_lock);
910 static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
912 struct ivtv *itv = s->itv;
913 struct ivtv_open_id *item;
916 IVTV_DEBUG_FILE("open %s\n", s->name);
918 if (s->type == IVTV_DEC_STREAM_TYPE_MPG &&
919 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
922 if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
923 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
926 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
927 if (read_reg(0x82c) == 0) {
928 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
929 /* return -ENODEV; */
931 ivtv_udma_alloc(itv);
934 /* Allocate memory */
935 item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
937 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
940 v4l2_fh_init(&item->fh, s->vdev);
941 if (s->type == IVTV_DEC_STREAM_TYPE_YUV ||
942 s->type == IVTV_DEC_STREAM_TYPE_MPG) {
943 res = v4l2_event_alloc(&item->fh, 60);
946 v4l2_fh_exit(&item->fh);
951 item->type = s->type;
952 v4l2_prio_open(&itv->prio, &item->prio);
954 item->open_id = itv->open_id++;
955 filp->private_data = &item->fh;
957 if (item->type == IVTV_ENC_STREAM_TYPE_RAD) {
958 /* Try to claim this stream */
959 if (ivtv_claim_stream(item, item->type)) {
960 /* No, it's already in use */
965 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
966 if (atomic_read(&itv->capturing) > 0) {
967 /* switching to radio while capture is
968 in progress is not polite */
969 ivtv_release_stream(s);
970 v4l2_fh_exit(&item->fh);
975 /* Mark that the radio is being used. */
976 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
977 /* We have the radio */
979 /* Switch tuner to radio */
980 ivtv_call_all(itv, tuner, s_radio);
981 /* Select the correct audio input (i.e. radio tuner) */
982 ivtv_audio_set_io(itv);
983 if (itv->hw_flags & IVTV_HW_SAA711X) {
984 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
985 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL);
987 /* Done! Unmute and continue. */
991 /* YUV or MPG Decoding Mode? */
992 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) {
993 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
994 } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
995 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
996 /* For yuv, we need to know the dma size before we start */
997 itv->dma_data_req_size =
998 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
999 itv->yuv_info.stream_size = 0;
1001 v4l2_fh_add(&item->fh);
1005 int ivtv_v4l2_open(struct file *filp)
1008 struct ivtv *itv = NULL;
1009 struct ivtv_stream *s = NULL;
1010 struct video_device *vdev = video_devdata(filp);
1012 s = video_get_drvdata(vdev);
1015 mutex_lock(&itv->serialize_lock);
1016 if (ivtv_init_on_first_open(itv)) {
1017 IVTV_ERR("Failed to initialize on device %s\n",
1018 video_device_node_name(vdev));
1019 mutex_unlock(&itv->serialize_lock);
1022 res = ivtv_serialized_open(s, filp);
1023 mutex_unlock(&itv->serialize_lock);
1027 void ivtv_mute(struct ivtv *itv)
1029 if (atomic_read(&itv->capturing))
1030 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1);
1031 IVTV_DEBUG_INFO("Mute\n");
1034 void ivtv_unmute(struct ivtv *itv)
1036 if (atomic_read(&itv->capturing)) {
1037 ivtv_msleep_timeout(100, 0);
1038 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
1039 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
1041 IVTV_DEBUG_INFO("Unmute\n");