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V4L/DVB (6006): tuner: move last_div to tuner-simple private data
[wrt350n-kernel.git] / drivers / media / video / ivtv / ivtv-fileops.c
blob9e867b5229d19b583fa945020347ce5f2f72689e
1 /*
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>
6
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.
11
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.
16
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
20 */
21
22 #include "ivtv-driver.h"
23 #include "ivtv-fileops.h"
24 #include "ivtv-i2c.h"
25 #include "ivtv-queue.h"
26 #include "ivtv-udma.h"
27 #include "ivtv-irq.h"
28 #include "ivtv-vbi.h"
29 #include "ivtv-mailbox.h"
30 #include "ivtv-audio.h"
31 #include "ivtv-streams.h"
32 #include "ivtv-yuv.h"
33 #include "ivtv-controls.h"
34 #include "ivtv-ioctl.h"
35 #include "ivtv-cards.h"
36 #include <media/saa7115.h>
37
38 /* This function tries to claim the stream for a specific file descriptor.
39 If no one else is using this stream then the stream is claimed and
40 associated VBI streams are also automatically claimed.
41 Possible error returns: -EBUSY if someone else has claimed
42 the stream or 0 on success. */
43 int ivtv_claim_stream(struct ivtv_open_id *id, int type)
44 {
45 struct ivtv *itv = id->itv;
46 struct ivtv_stream *s = &itv->streams[type];
47 struct ivtv_stream *s_vbi;
48 int vbi_type;
49
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. */
54 return 0;
55 }
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. */
61 s->id = id->open_id;
62 IVTV_DEBUG_INFO("Start Read VBI\n");
63 return 0;
64 }
65 /* someone else is using this stream already */
66 IVTV_DEBUG_INFO("Stream %d is busy\n", type);
67 return -EBUSY;
68 }
69 s->id = id->open_id;
70 if (type == IVTV_DEC_STREAM_TYPE_VBI) {
71 /* Enable reinsertion interrupt */
72 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
73 }
74
75 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
76 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
77 (provided VBI insertion is on and sliced VBI is selected), for all
78 other streams we're done */
79 if (type == IVTV_DEC_STREAM_TYPE_MPG) {
80 vbi_type = IVTV_DEC_STREAM_TYPE_VBI;
81 } else if (type == IVTV_ENC_STREAM_TYPE_MPG &&
82 itv->vbi.insert_mpeg && itv->vbi.sliced_in->service_set) {
83 vbi_type = IVTV_ENC_STREAM_TYPE_VBI;
84 } else {
85 return 0;
86 }
87 s_vbi = &itv->streams[vbi_type];
88
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);
93 }
94 /* mark that it is used internally */
95 set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags);
96 return 0;
97 }
98
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)
102 {
103 struct ivtv *itv = s->itv;
104 struct ivtv_stream *s_vbi;
105
106 s->id = -1;
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 */
110 return;
111 }
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);
114 return;
115 }
116
117 ivtv_flush_queues(s);
118
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);
122
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];
130 else
131 return;
132
133 /* clear internal use flag */
134 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) {
135 /* was already cleared */
136 return;
137 }
138 if (s_vbi->id != -1) {
139 /* VBI stream still claimed by a file descriptor */
140 return;
141 }
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);
147 }
148
149 static void ivtv_dualwatch(struct ivtv *itv)
150 {
151 struct v4l2_tuner vt;
152 u16 new_bitmap;
153 u16 new_stereo_mode;
154 const u16 stereo_mask = 0x0300;
155 const u16 dual = 0x0200;
156
157 new_stereo_mode = itv->params.audio_properties & stereo_mask;
158 memset(&vt, 0, sizeof(vt));
159 ivtv_call_i2c_clients(itv, VIDIOC_G_TUNER, &vt);
160 if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2))
161 new_stereo_mode = dual;
162
163 if (new_stereo_mode == itv->dualwatch_stereo_mode)
164 return;
165
166 new_bitmap = new_stereo_mode | (itv->params.audio_properties & ~stereo_mask);
167
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);
170
171 if (ivtv_vapi(itv, CX2341X_ENC_SET_AUDIO_PROPERTIES, 1, new_bitmap) == 0) {
172 itv->dualwatch_stereo_mode = new_stereo_mode;
173 return;
174 }
175 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
176 }
177
178 static void ivtv_update_pgm_info(struct ivtv *itv)
179 {
180 u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24;
181 int cnt;
182 int i = 0;
183
184 if (wr_idx >= itv->pgm_info_num) {
185 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num);
186 return;
187 }
188 cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num;
189 while (i < cnt) {
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 };
195 // 1=I, 2=P, 4=B
196
197 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32);
198 if (e->offset > itv->mpg_data_received) {
199 break;
200 }
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];
205 i++;
206 }
207 itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
208 }
209
210 static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err)
211 {
212 struct ivtv *itv = s->itv;
213 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
214 struct ivtv_buffer *buf;
215 DEFINE_WAIT(wait);
216
217 *err = 0;
218 while (1) {
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);
222
223 if (jiffies - itv->dualwatch_jiffies > msecs_to_jiffies(1000)) {
224 itv->dualwatch_jiffies = jiffies;
225 ivtv_dualwatch(itv);
226 }
227
228 if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
229 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
230 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) {
231 /* byteswap and process VBI data */
232 ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type);
233 ivtv_enqueue(s_vbi, buf, &s_vbi->q_free);
234 }
235 }
236 buf = &itv->vbi.sliced_mpeg_buf;
237 if (buf->readpos != buf->bytesused) {
238 return buf;
239 }
240 }
241
242 /* do we have leftover data? */
243 buf = ivtv_dequeue(s, &s->q_io);
244 if (buf)
245 return buf;
246
247 /* do we have new data? */
248 buf = ivtv_dequeue(s, &s->q_full);
249 if (buf) {
250 if (!test_and_clear_bit(IVTV_F_B_NEED_BUF_SWAP, &buf->b_flags))
251 return buf;
252 if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
253 /* byteswap MPG data */
254 ivtv_buf_swap(buf);
255 else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) {
256 /* byteswap and process VBI data */
257 ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type);
258 }
259 return buf;
260 }
261 /* return if file was opened with O_NONBLOCK */
262 if (non_block) {
263 *err = -EAGAIN;
264 return NULL;
265 }
266
267 /* return if end of stream */
268 if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
269 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
270 IVTV_DEBUG_INFO("EOS %s\n", s->name);
271 return NULL;
272 }
273
274 /* wait for more data to arrive */
275 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
276 /* New buffers might have become available before we were added to the waitqueue */
277 if (!s->q_full.buffers)
278 schedule();
279 finish_wait(&s->waitq, &wait);
280 if (signal_pending(current)) {
281 /* return if a signal was received */
282 IVTV_DEBUG_INFO("User stopped %s\n", s->name);
283 *err = -EINTR;
284 return NULL;
285 }
286 }
287 }
288
289 static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv)
290 {
291 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
292
293 itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx];
294 itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx];
295 itv->vbi.sliced_mpeg_buf.readpos = 0;
296 }
297
298 static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf,
299 char __user *ubuf, size_t ucount)
300 {
301 struct ivtv *itv = s->itv;
302 size_t len = buf->bytesused - buf->readpos;
303
304 if (len > ucount) len = ucount;
305 if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG &&
306 itv->vbi.sliced_in->service_set && buf != &itv->vbi.sliced_mpeg_buf) {
307 const char *start = buf->buf + buf->readpos;
308 const char *p = start + 1;
309 const u8 *q;
310 u8 ch = itv->search_pack_header ? 0xba : 0xe0;
311 int stuffing, i;
312
313 while (start + len > p && (q = memchr(p, 0, start + len - p))) {
314 p = q + 1;
315 if ((char *)q + 15 >= buf->buf + buf->bytesused ||
316 q[1] != 0 || q[2] != 1 || q[3] != ch) {
317 continue;
318 }
319 if (!itv->search_pack_header) {
320 if ((q[6] & 0xc0) != 0x80)
321 continue;
322 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) ||
323 ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) {
324 ch = 0xba;
325 itv->search_pack_header = 1;
326 p = q + 9;
327 }
328 continue;
329 }
330 stuffing = q[13] & 7;
331 /* all stuffing bytes must be 0xff */
332 for (i = 0; i < stuffing; i++)
333 if (q[14 + i] != 0xff)
334 break;
335 if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 &&
336 q[14 + stuffing] == 0 && q[15 + stuffing] == 0 &&
337 q[16 + stuffing] == 1) {
338 itv->search_pack_header = 0;
339 len = (char *)q - start;
340 ivtv_setup_sliced_vbi_buf(itv);
341 break;
342 }
343 }
344 }
345 if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) {
346 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name);
347 return -EFAULT;
348 }
349 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
350 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
351 buf == &itv->vbi.sliced_mpeg_buf); */
352 buf->readpos += len;
353 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf)
354 itv->mpg_data_received += len;
355 return len;
356 }
357
358 static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block)
359 {
360 struct ivtv *itv = s->itv;
361 size_t tot_written = 0;
362 int single_frame = 0;
363
364 if (atomic_read(&itv->capturing) == 0 && s->id == -1) {
365 /* shouldn't happen */
366 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name);
367 return -EIO;
368 }
369
370 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
371 arrive one-by-one, so make sure we never output more than one VBI frame at a time */
372 if (s->type == IVTV_DEC_STREAM_TYPE_VBI ||
373 (s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set))
374 single_frame = 1;
375
376 for (;;) {
377 struct ivtv_buffer *buf;
378 int rc;
379
380 buf = ivtv_get_buffer(s, non_block, &rc);
381 if (buf == NULL && rc == -EAGAIN && tot_written)
382 break;
383 if (buf == NULL)
384 return rc;
385 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written);
386 if (buf != &itv->vbi.sliced_mpeg_buf) {
387 ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io);
388 }
389 else if (buf->readpos == buf->bytesused) {
390 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
391 itv->vbi.sliced_mpeg_size[idx] = 0;
392 itv->vbi.inserted_frame++;
393 itv->vbi_data_inserted += buf->bytesused;
394 }
395 if (rc < 0)
396 return rc;
397 tot_written += rc;
398
399 if (tot_written == tot_count || single_frame)
400 break;
401 }
402 return tot_written;
403 }
404
405 static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count,
406 loff_t *pos, int non_block)
407 {
408 ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0;
409 struct ivtv *itv = s->itv;
410
411 IVTV_DEBUG_HI_INFO("read %zd from %s, got %zd\n", count, s->name, rc);
412 if (rc > 0)
413 pos += rc;
414 return rc;
415 }
416
417 int ivtv_start_capture(struct ivtv_open_id *id)
418 {
419 struct ivtv *itv = id->itv;
420 struct ivtv_stream *s = &itv->streams[id->type];
421 struct ivtv_stream *s_vbi;
422
423 if (s->type == IVTV_ENC_STREAM_TYPE_RAD ||
424 s->type == IVTV_DEC_STREAM_TYPE_MPG ||
425 s->type == IVTV_DEC_STREAM_TYPE_YUV ||
426 s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
427 /* you cannot read from these stream types. */
428 return -EPERM;
429 }
430
431 /* Try to claim this stream. */
432 if (ivtv_claim_stream(id, s->type))
433 return -EBUSY;
434
435 /* This stream does not need to start capturing */
436 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
437 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
438 return 0;
439 }
440
441 /* If capture is already in progress, then we also have to
442 do nothing extra. */
443 if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
444 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
445 return 0;
446 }
447
448 /* Start VBI capture if required */
449 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
450 if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
451 test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
452 !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
453 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
454 automatically when the MPG stream is claimed.
455 We only need to start the VBI capturing. */
456 if (ivtv_start_v4l2_encode_stream(s_vbi)) {
457 IVTV_DEBUG_WARN("VBI capture start failed\n");
458
459 /* Failure, clean up and return an error */
460 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
461 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
462 /* also releases the associated VBI stream */
463 ivtv_release_stream(s);
464 return -EIO;
465 }
466 IVTV_DEBUG_INFO("VBI insertion started\n");
467 }
468
469 /* Tell the card to start capturing */
470 if (!ivtv_start_v4l2_encode_stream(s)) {
471 /* We're done */
472 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
473 /* Resume a possibly paused encoder */
474 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags))
475 ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1);
476 return 0;
477 }
478
479 /* failure, clean up */
480 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
481
482 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
483 automatically when the MPG stream is released.
484 We only need to stop the VBI capturing. */
485 if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
486 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
487 ivtv_stop_v4l2_encode_stream(s_vbi, 0);
488 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
489 }
490 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
491 ivtv_release_stream(s);
492 return -EIO;
493 }
494
495 ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos)
496 {
497 struct ivtv_open_id *id = filp->private_data;
498 struct ivtv *itv = id->itv;
499 struct ivtv_stream *s = &itv->streams[id->type];
500 int rc;
501
502 IVTV_DEBUG_HI_IOCTL("read %zd bytes from %s\n", count, s->name);
503
504 rc = ivtv_start_capture(id);
505 if (rc)
506 return rc;
507 return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
508 }
509
510 int ivtv_start_decoding(struct ivtv_open_id *id, int speed)
511 {
512 struct ivtv *itv = id->itv;
513 struct ivtv_stream *s = &itv->streams[id->type];
514
515 if (atomic_read(&itv->decoding) == 0) {
516 if (ivtv_claim_stream(id, s->type)) {
517 /* someone else is using this stream already */
518 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
519 return -EBUSY;
520 }
521 ivtv_start_v4l2_decode_stream(s, 0);
522 }
523 if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
524 return ivtv_set_speed(itv, speed);
525 return 0;
526 }
527
528 ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
529 {
530 struct ivtv_open_id *id = filp->private_data;
531 struct ivtv *itv = id->itv;
532 struct ivtv_stream *s = &itv->streams[id->type];
533 struct ivtv_buffer *buf;
534 struct ivtv_queue q;
535 int bytes_written = 0;
536 int mode;
537 int rc;
538 DEFINE_WAIT(wait);
539
540 IVTV_DEBUG_HI_IOCTL("write %zd bytes to %s\n", count, s->name);
541
542 if (s->type != IVTV_DEC_STREAM_TYPE_MPG &&
543 s->type != IVTV_DEC_STREAM_TYPE_YUV &&
544 s->type != IVTV_DEC_STREAM_TYPE_VOUT)
545 /* not decoder streams */
546 return -EPERM;
547
548 /* Try to claim this stream */
549 if (ivtv_claim_stream(id, s->type))
550 return -EBUSY;
551
552 /* This stream does not need to start any decoding */
553 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
554 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
555 return ivtv_write_vbi(itv, user_buf, count);
556 }
557
558 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV;
559
560 if (ivtv_set_output_mode(itv, mode) != mode) {
561 ivtv_release_stream(s);
562 return -EBUSY;
563 }
564 ivtv_queue_init(&q);
565 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
566
567 retry:
568 for (;;) {
569 /* Gather buffers */
570 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io)))
571 ivtv_enqueue(s, buf, &q);
572 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) {
573 ivtv_enqueue(s, buf, &q);
574 }
575 if (q.buffers)
576 break;
577 if (filp->f_flags & O_NONBLOCK)
578 return -EAGAIN;
579 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
580 /* New buffers might have become free before we were added to the waitqueue */
581 if (!s->q_free.buffers)
582 schedule();
583 finish_wait(&s->waitq, &wait);
584 if (signal_pending(current)) {
585 IVTV_DEBUG_INFO("User stopped %s\n", s->name);
586 return -EINTR;
587 }
588 }
589
590 /* copy user data into buffers */
591 while ((buf = ivtv_dequeue(s, &q))) {
592 /* Make sure we really got all the user data */
593 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count);
594
595 if (rc < 0) {
596 ivtv_queue_move(s, &q, NULL, &s->q_free, 0);
597 return rc;
598 }
599 user_buf += rc;
600 count -= rc;
601 bytes_written += rc;
602
603 if (buf->bytesused != s->buf_size) {
604 /* incomplete, leave in q_io for next time */
605 ivtv_enqueue(s, buf, &s->q_io);
606 break;
607 }
608 /* Byteswap MPEG buffer */
609 if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
610 ivtv_buf_swap(buf);
611 ivtv_enqueue(s, buf, &s->q_full);
612 }
613
614 /* Start decoder (returns 0 if already started) */
615 rc = ivtv_start_decoding(id, itv->speed);
616 if (rc) {
617 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name);
618
619 /* failure, clean up */
620 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
621 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
622 return rc;
623 }
624 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) {
625 if (s->q_full.length >= itv->dma_data_req_size) {
626 int got_sig;
627
628 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
629 while (!(got_sig = signal_pending(current)) &&
630 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) {
631 schedule();
632 }
633 finish_wait(&itv->dma_waitq, &wait);
634 if (got_sig) {
635 IVTV_DEBUG_INFO("User interrupted %s\n", s->name);
636 return -EINTR;
637 }
638
639 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
640 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size);
641 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1);
642 }
643 }
644 /* more user data is available, wait until buffers become free
645 to transfer the rest. */
646 if (count && !(filp->f_flags & O_NONBLOCK))
647 goto retry;
648 IVTV_DEBUG_HI_INFO("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
649 return bytes_written;
650 }
651
652 unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
653 {
654 struct ivtv_open_id *id = filp->private_data;
655 struct ivtv *itv = id->itv;
656 struct ivtv_stream *s = &itv->streams[id->type];
657 int res = 0;
658
659 /* add stream's waitq to the poll list */
660 poll_wait(filp, &s->waitq, wait);
661
662 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
663 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
664 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
665 res = POLLPRI;
666
667 /* Allow write if buffers are available for writing */
668 if (s->q_free.buffers)
669 res |= POLLOUT | POLLWRNORM;
670 return res;
671 }
672
673 unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait)
674 {
675 struct ivtv_open_id *id = filp->private_data;
676 struct ivtv *itv = id->itv;
677 struct ivtv_stream *s = &itv->streams[id->type];
678 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
679
680 /* Start a capture if there is none */
681 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
682 int rc = ivtv_start_capture(id);
683
684 if (rc) {
685 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
686 s->name, rc);
687 return POLLERR;
688 }
689 }
690
691 /* add stream's waitq to the poll list */
692 poll_wait(filp, &s->waitq, wait);
693
694 if (eof || s->q_full.length)
695 return POLLIN | POLLRDNORM;
696 return 0;
697 }
698
699 void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end)
700 {
701 struct ivtv *itv = id->itv;
702 struct ivtv_stream *s = &itv->streams[id->type];
703
704 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
705
706 /* 'Unclaim' this stream */
707
708 /* Stop capturing */
709 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
710 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
711
712 IVTV_DEBUG_INFO("close stopping capture\n");
713 /* Special case: a running VBI capture for VBI insertion
714 in the mpeg stream. Need to stop that too. */
715 if (id->type == IVTV_ENC_STREAM_TYPE_MPG &&
716 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) &&
717 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
718 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
719 ivtv_stop_v4l2_encode_stream(s_vbi, 0);
720 }
721 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI ||
722 id->type == IVTV_ENC_STREAM_TYPE_VBI) &&
723 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
724 /* Also used internally, don't stop capturing */
725 s->id = -1;
726 }
727 else {
728 ivtv_stop_v4l2_encode_stream(s, gop_end);
729 }
730 }
731 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
732 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
733
734 ivtv_release_stream(s);
735 }
736
737 static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
738 {
739 struct ivtv *itv = id->itv;
740 struct ivtv_stream *s = &itv->streams[id->type];
741
742 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
743
744 /* Stop decoding */
745 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
746 IVTV_DEBUG_INFO("close stopping decode\n");
747
748 ivtv_stop_v4l2_decode_stream(s, flags, pts);
749 }
750 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
751 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
752 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) {
753 /* Restore registers we've changed & clean up any mess we've made */
754 ivtv_yuv_close(itv);
755 }
756 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_YUV)
757 itv->output_mode = OUT_NONE;
758 else if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_UDMA_YUV)
759 itv->output_mode = OUT_NONE;
760 else if (s->type == IVTV_DEC_STREAM_TYPE_MPG && itv->output_mode == OUT_MPG)
761 itv->output_mode = OUT_NONE;
762
763 itv->speed = 0;
764 clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);
765 ivtv_release_stream(s);
766 }
767
768 int ivtv_v4l2_close(struct inode *inode, struct file *filp)
769 {
770 struct ivtv_open_id *id = filp->private_data;
771 struct ivtv *itv = id->itv;
772 struct ivtv_stream *s = &itv->streams[id->type];
773
774 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
775
776 v4l2_prio_close(&itv->prio, &id->prio);
777
778 /* Easy case first: this stream was never claimed by us */
779 if (s->id != id->open_id) {
780 kfree(id);
781 return 0;
782 }
783
784 /* 'Unclaim' this stream */
785
786 /* Stop radio */
787 if (id->type == IVTV_ENC_STREAM_TYPE_RAD) {
788 /* Closing radio device, return to TV mode */
789 ivtv_mute(itv);
790 /* Mark that the radio is no longer in use */
791 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
792 /* Switch tuner to TV */
793 ivtv_call_i2c_clients(itv, VIDIOC_S_STD, &itv->std);
794 /* Select correct audio input (i.e. TV tuner or Line in) */
795 ivtv_audio_set_io(itv);
796 if (itv->hw_flags & IVTV_HW_SAA711X)
797 {
798 struct v4l2_crystal_freq crystal_freq;
799 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ;
800 crystal_freq.flags = 0;
801 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq);
802 }
803 /* Done! Unmute and continue. */
804 ivtv_unmute(itv);
805 ivtv_release_stream(s);
806 } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) {
807 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT];
808
809 ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0);
810
811 /* If all output streams are closed, and if the user doesn't have
812 IVTV_DEC_STREAM_TYPE_VOUT open, then disable VBI on TV-out. */
813 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) {
814 /* disable VBI on TV-out */
815 ivtv_disable_vbi(itv);
816 }
817 } else {
818 ivtv_stop_capture(id, 0);
819 }
820 kfree(id);
821 return 0;
822 }
823
824 int ivtv_v4l2_open(struct inode *inode, struct file *filp)
825 {
826 int x, y = 0;
827 struct ivtv_open_id *item;
828 struct ivtv *itv = NULL;
829 struct ivtv_stream *s = NULL;
830 int minor = iminor(inode);
831
832 /* Find which card this open was on */
833 spin_lock(&ivtv_cards_lock);
834 for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
835 /* find out which stream this open was on */
836 for (y = 0; y < IVTV_MAX_STREAMS; y++) {
837 s = &ivtv_cards[x]->streams[y];
838 if (s->v4l2dev && s->v4l2dev->minor == minor) {
839 itv = ivtv_cards[x];
840 break;
841 }
842 }
843 }
844 spin_unlock(&ivtv_cards_lock);
845
846 if (itv == NULL) {
847 /* Couldn't find a device registered
848 on that minor, shouldn't happen! */
849 IVTV_WARN("No ivtv device found on minor %d\n", minor);
850 return -ENXIO;
851 }
852
853 if (ivtv_init_on_first_open(itv)) {
854 IVTV_ERR("Failed to initialize on minor %d\n", minor);
855 return -ENXIO;
856 }
857
858 if (y == IVTV_DEC_STREAM_TYPE_MPG &&
859 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
860 return -EBUSY;
861
862 if (y == IVTV_DEC_STREAM_TYPE_YUV &&
863 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
864 return -EBUSY;
865
866 if (y == IVTV_DEC_STREAM_TYPE_YUV) {
867 if (read_reg(0x82c) == 0) {
868 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
869 /* return -ENODEV; */
870 }
871 ivtv_udma_alloc(itv);
872 }
873
874 /* Allocate memory */
875 item = kmalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
876 if (NULL == item) {
877 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
878 return -ENOMEM;
879 }
880 item->itv = itv;
881 item->type = y;
882 v4l2_prio_open(&itv->prio, &item->prio);
883
884 item->open_id = itv->open_id++;
885 filp->private_data = item;
886
887 if (item->type == IVTV_ENC_STREAM_TYPE_RAD) {
888 /* Try to claim this stream */
889 if (ivtv_claim_stream(item, item->type)) {
890 /* No, it's already in use */
891 kfree(item);
892 return -EBUSY;
893 }
894
895 /* We have the radio */
896 ivtv_mute(itv);
897 /* Switch tuner to radio */
898 ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL);
899 /* Mark that the radio is being used. */
900 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
901 /* Select the correct audio input (i.e. radio tuner) */
902 ivtv_audio_set_io(itv);
903 if (itv->hw_flags & IVTV_HW_SAA711X)
904 {
905 struct v4l2_crystal_freq crystal_freq;
906 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ;
907 crystal_freq.flags = SAA7115_FREQ_FL_APLL;
908 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq);
909 }
910 /* Done! Unmute and continue. */
911 ivtv_unmute(itv);
912 }
913
914 /* YUV or MPG Decoding Mode? */
915 if (y == IVTV_DEC_STREAM_TYPE_MPG)
916 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
917 else if (y == IVTV_DEC_STREAM_TYPE_YUV)
918 {
919 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
920 }
921
922 return 0;
923 }
924
925 void ivtv_mute(struct ivtv *itv)
926 {
927 if (atomic_read(&itv->capturing))
928 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1);
929 IVTV_DEBUG_INFO("Mute\n");
930 }
931
932 void ivtv_unmute(struct ivtv *itv)
933 {
934 /* initialize or refresh input */
935 if (atomic_read(&itv->capturing) == 0)
936 ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
937
938 ivtv_msleep_timeout(100, 0);
939
940 if (atomic_read(&itv->capturing)) {
941 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
942 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
943 }
944 IVTV_DEBUG_INFO("Unmute\n");
945 }
WRT350N Kernel Patches