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V4L/DVB (5900): usbvision: fix bugs [sg]_register functions
[net-next-2.6.git] / drivers / media / video / ivtv / ivtv-fileops.c
CommitLineData
1a0adaf3
HV		 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"
f2100d82
HV		 35#include "ivtv-cards.h"
36#include <media/saa7115.h>
1a0adaf3
HV		 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. */
43int 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. */
101void 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
149static 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
178static 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[] = { V4L2_ENC_IDX_FRAME_P, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_B, 0 };
194
195 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32);
196 if (e->offset > itv->mpg_data_received) {
197 break;
198 }
199 e->offset += itv->vbi_data_inserted;
200 e->length = read_enc(addr);
201 e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32);
202 e->flags = mapping[read_enc(addr + 12) & 3];
203 i++;
204 }
205 itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
206}
207
208static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err)
209{
210 struct ivtv *itv = s->itv;
211 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
212 struct ivtv_buffer *buf;
213 DEFINE_WAIT(wait);
214
215 *err = 0;
216 while (1) {
217 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) {
218 /* Process pending program info updates and pending VBI data */
219 ivtv_update_pgm_info(itv);
220
201700d3 221 if (jiffies - itv->dualwatch_jiffies > msecs_to_jiffies(1000)) {
1a0adaf3
HV		 222 itv->dualwatch_jiffies = jiffies;
223 ivtv_dualwatch(itv);
224 }
225
226 if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
227 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
228 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) {
229 /* byteswap and process VBI data */
230 ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type);
231 ivtv_enqueue(s_vbi, buf, &s_vbi->q_free);
232 }
233 }
234 buf = &itv->vbi.sliced_mpeg_buf;
235 if (buf->readpos != buf->bytesused) {
236 return buf;
237 }
238 }
239
240 /* do we have leftover data? */
241 buf = ivtv_dequeue(s, &s->q_io);
242 if (buf)
243 return buf;
244
245 /* do we have new data? */
246 buf = ivtv_dequeue(s, &s->q_full);
247 if (buf) {
248 if (!test_and_clear_bit(IVTV_F_B_NEED_BUF_SWAP, &buf->b_flags))
249 return buf;
250 if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
251 /* byteswap MPG data */
252 ivtv_buf_swap(buf);
253 else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) {
254 /* byteswap and process VBI data */
255 ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type);
256 }
257 return buf;
258 }
259 /* return if file was opened with O_NONBLOCK */
260 if (non_block) {
261 *err = -EAGAIN;
262 return NULL;
263 }
264
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 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
268 IVTV_DEBUG_INFO("EOS %s\n", s->name);
269 return NULL;
270 }
271
272 /* wait for more data to arrive */
273 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
274 /* New buffers might have become available before we were added to the waitqueue */
275 if (!s->q_full.buffers)
276 schedule();
277 finish_wait(&s->waitq, &wait);
278 if (signal_pending(current)) {
279 /* return if a signal was received */
280 IVTV_DEBUG_INFO("User stopped %s\n", s->name);
281 *err = -EINTR;
282 return NULL;
283 }
284 }
285}
286
287static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv)
288{
289 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
290
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;
294}
295
296static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf,
297 char __user *ubuf, size_t ucount)
298{
299 struct ivtv *itv = s->itv;
300 size_t len = buf->bytesused - buf->readpos;
301
302 if (len > ucount) len = ucount;
303 if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG &&
304 itv->vbi.sliced_in->service_set && buf != &itv->vbi.sliced_mpeg_buf) {
305 const char *start = buf->buf + buf->readpos;
306 const char *p = start + 1;
307 const u8 *q;
308 u8 ch = itv->search_pack_header ? 0xba : 0xe0;
309 int stuffing, i;
310
311 while (start + len > p && (q = memchr(p, 0, start + len - p))) {
312 p = q + 1;
313 if ((char *)q + 15 >= buf->buf + buf->bytesused ||
314 q[1] != 0 || q[2] != 1 || q[3] != ch) {
315 continue;
316 }
317 if (!itv->search_pack_header) {
318 if ((q[6] & 0xc0) != 0x80)
319 continue;
320 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) ||
321 ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) {
322 ch = 0xba;
323 itv->search_pack_header = 1;
324 p = q + 9;
325 }
326 continue;
327 }
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)
332 break;
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);
339 break;
340 }
341 }
342 }
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);
345 return -EFAULT;
346 }
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); */
350 buf->readpos += len;
351 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf)
352 itv->mpg_data_received += len;
353 return len;
354}
355
356static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block)
357{
358 struct ivtv *itv = s->itv;
359 size_t tot_written = 0;
360 int single_frame = 0;
361
362 if (atomic_read(&itv->capturing) == 0 && s->id == -1) {
363 /* shouldn't happen */
364 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name);
365 return -EIO;
366 }
367
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 && itv->vbi.sliced_in->service_set))
372 single_frame = 1;
373
374 for (;;) {
375 struct ivtv_buffer *buf;
376 int rc;
377
378 buf = ivtv_get_buffer(s, non_block, &rc);
379 if (buf == NULL && rc == -EAGAIN && tot_written)
380 break;
381 if (buf == NULL)
382 return rc;
383 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written);
384 if (buf != &itv->vbi.sliced_mpeg_buf) {
385 ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io);
386 }
387 else if (buf->readpos == buf->bytesused) {
388 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
389 itv->vbi.sliced_mpeg_size[idx] = 0;
390 itv->vbi.inserted_frame++;
391 itv->vbi_data_inserted += buf->bytesused;
392 }
393 if (rc < 0)
394 return rc;
395 tot_written += rc;
396
397 if (tot_written == tot_count || single_frame)
398 break;
399 }
400 return tot_written;
401}
402
403static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count,
404 loff_t *pos, int non_block)
405{
406 ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0;
407 struct ivtv *itv = s->itv;
408
bd58df6d 409 IVTV_DEBUG_HI_INFO("read %zd from %s, got %zd\n", count, s->name, rc);
1a0adaf3
HV		 410 if (rc > 0)
411 pos += rc;
412 return rc;
413}
414
415int ivtv_start_capture(struct ivtv_open_id *id)
416{
417 struct ivtv *itv = id->itv;
418 struct ivtv_stream *s = &itv->streams[id->type];
419 struct ivtv_stream *s_vbi;
420
421 if (s->type == IVTV_ENC_STREAM_TYPE_RAD ||
422 s->type == IVTV_DEC_STREAM_TYPE_MPG ||
423 s->type == IVTV_DEC_STREAM_TYPE_YUV ||
424 s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
425 /* you cannot read from these stream types. */
426 return -EPERM;
427 }
428
429 /* Try to claim this stream. */
430 if (ivtv_claim_stream(id, s->type))
431 return -EBUSY;
432
433 /* This stream does not need to start capturing */
434 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
435 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
436 return 0;
437 }
438
439 /* If capture is already in progress, then we also have to
440 do nothing extra. */
441 if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
442 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
443 return 0;
444 }
445
446 /* Start VBI capture if required */
447 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
448 if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
449 test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
450 !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
451 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
452 automatically when the MPG stream is claimed.
453 We only need to start the VBI capturing. */
454 if (ivtv_start_v4l2_encode_stream(s_vbi)) {
455 IVTV_DEBUG_WARN("VBI capture start failed\n");
456
457 /* Failure, clean up and return an error */
458 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
459 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
460 /* also releases the associated VBI stream */
461 ivtv_release_stream(s);
462 return -EIO;
463 }
464 IVTV_DEBUG_INFO("VBI insertion started\n");
465 }
466
467 /* Tell the card to start capturing */
468 if (!ivtv_start_v4l2_encode_stream(s)) {
469 /* We're done */
470 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
471 /* Resume a possibly paused encoder */
472 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags))
473 ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1);
474 return 0;
475 }
476
477 /* failure, clean up */
478 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
479
480 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
481 automatically when the MPG stream is released.
482 We only need to stop the VBI capturing. */
483 if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
484 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
485 ivtv_stop_v4l2_encode_stream(s_vbi, 0);
486 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
487 }
488 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
489 ivtv_release_stream(s);
490 return -EIO;
491}
492
493ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos)
494{
495 struct ivtv_open_id *id = filp->private_data;
496 struct ivtv *itv = id->itv;
497 struct ivtv_stream *s = &itv->streams[id->type];
498 int rc;
499
bd58df6d 500 IVTV_DEBUG_HI_IOCTL("read %zd bytes from %s\n", count, s->name);
1a0adaf3
HV		 501
502 rc = ivtv_start_capture(id);
503 if (rc)
504 return rc;
505 return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
506}
507
508int ivtv_start_decoding(struct ivtv_open_id *id, int speed)
509{
510 struct ivtv *itv = id->itv;
511 struct ivtv_stream *s = &itv->streams[id->type];
512
513 if (atomic_read(&itv->decoding) == 0) {
514 if (ivtv_claim_stream(id, s->type)) {
515 /* someone else is using this stream already */
516 IVTV_DEBUG_WARN("start decode, stream already claimed\n");
517 return -EBUSY;
518 }
519 ivtv_start_v4l2_decode_stream(s, 0);
520 }
521 if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
522 return ivtv_set_speed(itv, speed);
523 return 0;
524}
525
526ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
527{
528 struct ivtv_open_id *id = filp->private_data;
529 struct ivtv *itv = id->itv;
530 struct ivtv_stream *s = &itv->streams[id->type];
531 struct ivtv_buffer *buf;
532 struct ivtv_queue q;
533 int bytes_written = 0;
534 int mode;
535 int rc;
536 DEFINE_WAIT(wait);
537
bd58df6d 538 IVTV_DEBUG_HI_IOCTL("write %zd bytes to %s\n", count, s->name);
1a0adaf3
HV		 539
540 if (s->type != IVTV_DEC_STREAM_TYPE_MPG &&
541 s->type != IVTV_DEC_STREAM_TYPE_YUV &&
542 s->type != IVTV_DEC_STREAM_TYPE_VOUT)
543 /* not decoder streams */
544 return -EPERM;
545
546 /* Try to claim this stream */
547 if (ivtv_claim_stream(id, s->type))
548 return -EBUSY;
549
550 /* This stream does not need to start any decoding */
551 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
552 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
553 return ivtv_write_vbi(itv, user_buf, count);
554 }
555
556 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV;
557
558 if (ivtv_set_output_mode(itv, mode) != mode) {
559 ivtv_release_stream(s);
560 return -EBUSY;
561 }
562 ivtv_queue_init(&q);
563 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
564
565retry:
566 for (;;) {
567 /* Gather buffers */
568 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io)))
569 ivtv_enqueue(s, buf, &q);
570 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) {
571 ivtv_enqueue(s, buf, &q);
572 }
573 if (q.buffers)
574 break;
575 if (filp->f_flags & O_NONBLOCK)
576 return -EAGAIN;
577 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
578 /* New buffers might have become free before we were added to the waitqueue */
579 if (!s->q_free.buffers)
580 schedule();
581 finish_wait(&s->waitq, &wait);
582 if (signal_pending(current)) {
583 IVTV_DEBUG_INFO("User stopped %s\n", s->name);
584 return -EINTR;
585 }
586 }
587
588 /* copy user data into buffers */
589 while ((buf = ivtv_dequeue(s, &q))) {
590 /* Make sure we really got all the user data */
591 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count);
592
593 if (rc < 0) {
594 ivtv_queue_move(s, &q, NULL, &s->q_free, 0);
595 return rc;
596 }
597 user_buf += rc;
598 count -= rc;
599 bytes_written += rc;
600
601 if (buf->bytesused != s->buf_size) {
602 /* incomplete, leave in q_io for next time */
603 ivtv_enqueue(s, buf, &s->q_io);
604 break;
605 }
606 /* Byteswap MPEG buffer */
607 if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
608 ivtv_buf_swap(buf);
609 ivtv_enqueue(s, buf, &s->q_full);
610 }
611
612 /* Start decoder (returns 0 if already started) */
613 rc = ivtv_start_decoding(id, itv->speed);
614 if (rc) {
615 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name);
616
617 /* failure, clean up */
618 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
619 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
620 return rc;
621 }
622 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) {
623 if (s->q_full.length >= itv->dma_data_req_size) {
624 int got_sig;
625
626 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
627 while (!(got_sig = signal_pending(current)) &&
628 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) {
629 schedule();
630 }
631 finish_wait(&itv->dma_waitq, &wait);
632 if (got_sig) {
633 IVTV_DEBUG_INFO("User interrupted %s\n", s->name);
634 return -EINTR;
635 }
636
637 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
638 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size);
639 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1);
640 }
641 }
642 /* more user data is available, wait until buffers become free
643 to transfer the rest. */
644 if (count && !(filp->f_flags & O_NONBLOCK))
645 goto retry;
bd58df6d 646 IVTV_DEBUG_HI_INFO("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
1a0adaf3
HV		 647 return bytes_written;
648}
649
650unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
651{
652 struct ivtv_open_id *id = filp->private_data;
653 struct ivtv *itv = id->itv;
654 struct ivtv_stream *s = &itv->streams[id->type];
655 int res = 0;
656
657 /* add stream's waitq to the poll list */
658 poll_wait(filp, &s->waitq, wait);
659
660 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
661 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
662 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
663 res = POLLPRI;
664
665 /* Allow write if buffers are available for writing */
666 if (s->q_free.buffers)
667 res |= POLLOUT | POLLWRNORM;
668 return res;
669}
670
671unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait)
672{
673 struct ivtv_open_id *id = filp->private_data;
674 struct ivtv *itv = id->itv;
675 struct ivtv_stream *s = &itv->streams[id->type];
676 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
677
678 /* Start a capture if there is none */
679 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
680 int rc = ivtv_start_capture(id);
681
682 if (rc) {
683 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
684 s->name, rc);
685 return POLLERR;
686 }
687 }
688
689 /* add stream's waitq to the poll list */
690 poll_wait(filp, &s->waitq, wait);
691
692 if (eof || s->q_full.length)
693 return POLLIN | POLLRDNORM;
694 return 0;
695}
696
697void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end)
698{
699 struct ivtv *itv = id->itv;
700 struct ivtv_stream *s = &itv->streams[id->type];
701
702 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
703
704 /* 'Unclaim' this stream */
705
706 /* Stop capturing */
707 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
708 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
709
710 IVTV_DEBUG_INFO("close stopping capture\n");
711 /* Special case: a running VBI capture for VBI insertion
712 in the mpeg stream. Need to stop that too. */
713 if (id->type == IVTV_ENC_STREAM_TYPE_MPG &&
714 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) &&
715 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
716 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
717 ivtv_stop_v4l2_encode_stream(s_vbi, 0);
718 }
719 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI ||
720 id->type == IVTV_ENC_STREAM_TYPE_VBI) &&
721 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
722 /* Also used internally, don't stop capturing */
723 s->id = -1;
724 }
725 else {
726 ivtv_stop_v4l2_encode_stream(s, gop_end);
727 }
728 }
729 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
730 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
731
732 ivtv_release_stream(s);
733}
734
31ec1356 735static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
1a0adaf3
HV		 736{
737 struct ivtv *itv = id->itv;
738 struct ivtv_stream *s = &itv->streams[id->type];
739
740 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
741
742 /* Stop decoding */
743 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
744 IVTV_DEBUG_INFO("close stopping decode\n");
745
746 ivtv_stop_v4l2_decode_stream(s, flags, pts);
747 }
748 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
749 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
750 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) {
751 /* Restore registers we've changed & clean up any mess we've made */
752 ivtv_yuv_close(itv);
753 }
754 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_YUV)
755 itv->output_mode = OUT_NONE;
756 else if (s->type == IVTV_DEC_STREAM_TYPE_MPG && itv->output_mode == OUT_MPG)
757 itv->output_mode = OUT_NONE;
758
759 itv->speed = 0;
760 ivtv_release_stream(s);
761}
762
763int ivtv_v4l2_close(struct inode *inode, struct file *filp)
764{
765 struct ivtv_open_id *id = filp->private_data;
766 struct ivtv *itv = id->itv;
767 struct ivtv_stream *s = &itv->streams[id->type];
768
769 IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
770
d46c17d7
HV		 771 v4l2_prio_close(&itv->prio, &id->prio);
772
1a0adaf3
HV		 773 /* Easy case first: this stream was never claimed by us */
774 if (s->id != id->open_id) {
775 kfree(id);
776 return 0;
777 }
778
779 /* 'Unclaim' this stream */
780
781 /* Stop radio */
782 if (id->type == IVTV_ENC_STREAM_TYPE_RAD) {
783 /* Closing radio device, return to TV mode */
784 ivtv_mute(itv);
785 /* Mark that the radio is no longer in use */
786 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
787 /* Switch tuner to TV */
788 ivtv_call_i2c_clients(itv, VIDIOC_S_STD, &itv->std);
789 /* Select correct audio input (i.e. TV tuner or Line in) */
790 ivtv_audio_set_io(itv);
f2100d82
HV		 791 if (itv->hw_flags & IVTV_HW_SAA711X)
792 {
793 struct v4l2_crystal_freq crystal_freq;
794 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ;
795 crystal_freq.flags = 0;
796 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq);
797 }
1a0adaf3
HV		 798 /* Done! Unmute and continue. */
799 ivtv_unmute(itv);
800 ivtv_release_stream(s);
801 } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) {
802 ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0);
803 } else {
804 ivtv_stop_capture(id, 0);
805 }
806 kfree(id);
807 return 0;
808}
809
810int ivtv_v4l2_open(struct inode *inode, struct file *filp)
811{
812 int x, y = 0;
813 struct ivtv_open_id *item;
814 struct ivtv *itv = NULL;
815 struct ivtv_stream *s = NULL;
b3785596 816 int minor = iminor(inode);
1a0adaf3
HV		 817
818 /* Find which card this open was on */
819 spin_lock(&ivtv_cards_lock);
820 for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
821 /* find out which stream this open was on */
822 for (y = 0; y < IVTV_MAX_STREAMS; y++) {
823 s = &ivtv_cards[x]->streams[y];
824 if (s->v4l2dev && s->v4l2dev->minor == minor) {
825 itv = ivtv_cards[x];
826 break;
827 }
828 }
829 }
830 spin_unlock(&ivtv_cards_lock);
831
832 if (itv == NULL) {
833 /* Couldn't find a device registered
834 on that minor, shouldn't happen! */
ae38d93b 835 printk(KERN_WARNING "ivtv: No ivtv device found on minor %d\n", minor);
1a0adaf3
HV		 836 return -ENXIO;
837 }
838
839 if (y == IVTV_DEC_STREAM_TYPE_MPG &&
840 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
841 return -EBUSY;
842
843 if (y == IVTV_DEC_STREAM_TYPE_YUV &&
844 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
845 return -EBUSY;
846
847 if (y == IVTV_DEC_STREAM_TYPE_YUV) {
848 if (read_reg(0x82c) == 0) {
849 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
850 /* return -ENODEV; */
851 }
852 ivtv_udma_alloc(itv);
853 }
854
855 /* Allocate memory */
856 item = kmalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
857 if (NULL == item) {
858 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
859 return -ENOMEM;
860 }
861 item->itv = itv;
862 item->type = y;
d46c17d7 863 v4l2_prio_open(&itv->prio, &item->prio);
1a0adaf3
HV		 864
865 item->open_id = itv->open_id++;
866 filp->private_data = item;
867
868 if (item->type == IVTV_ENC_STREAM_TYPE_RAD) {
869 /* Try to claim this stream */
870 if (ivtv_claim_stream(item, item->type)) {
871 /* No, it's already in use */
872 kfree(item);
873 return -EBUSY;
874 }
875
876 /* We have the radio */
877 ivtv_mute(itv);
878 /* Switch tuner to radio */
879 ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL);
880 /* Mark that the radio is being used. */
881 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
882 /* Select the correct audio input (i.e. radio tuner) */
883 ivtv_audio_set_io(itv);
f2100d82
HV		 884 if (itv->hw_flags & IVTV_HW_SAA711X)
885 {
886 struct v4l2_crystal_freq crystal_freq;
887 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ;
888 crystal_freq.flags = SAA7115_FREQ_FL_APLL;
889 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq);
890 }
1a0adaf3
HV		 891 /* Done! Unmute and continue. */
892 ivtv_unmute(itv);
893 }
894
895 /* YUV or MPG Decoding Mode? */
896 if (y == IVTV_DEC_STREAM_TYPE_MPG)
897 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
898 else if (y == IVTV_DEC_STREAM_TYPE_YUV)
899 {
900 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
901 }
902
903 return 0;
904}
905
906void ivtv_mute(struct ivtv *itv)
907{
908 struct v4l2_control ctrl = { V4L2_CID_AUDIO_MUTE, 1 };
909
910 /* Mute sound to avoid pop */
911 ivtv_control_ioctls(itv, VIDIOC_S_CTRL, &ctrl);
912
913 if (atomic_read(&itv->capturing))
914 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1);
915
916 IVTV_DEBUG_INFO("Mute\n");
917}
918
919void ivtv_unmute(struct ivtv *itv)
920{
921 struct v4l2_control ctrl = { V4L2_CID_AUDIO_MUTE, 0 };
922
923 /* initialize or refresh input */
924 if (atomic_read(&itv->capturing) == 0)
925 ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
926
201700d3 927 ivtv_msleep_timeout(100, 0);
1a0adaf3
HV		 928
929 if (atomic_read(&itv->capturing)) {
930 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
931 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
932 }
933
934 /* Unmute */
935 ivtv_control_ioctls(itv, VIDIOC_S_CTRL, &ctrl);
936 IVTV_DEBUG_INFO("Unmute\n");
937}
Clone of davem's net-next-2.6 tree