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Commit | Line | Data |
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1c1e45d1 HV |
1 | /* |
2 | * cx18 file operation functions | |
3 | * | |
4 | * Derived from ivtv-fileops.c | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
6afdeaf8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> |
1c1e45d1 HV |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | * 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include "cx18-driver.h" | |
26 | #include "cx18-fileops.h" | |
27 | #include "cx18-i2c.h" | |
28 | #include "cx18-queue.h" | |
29 | #include "cx18-vbi.h" | |
30 | #include "cx18-audio.h" | |
31 | #include "cx18-mailbox.h" | |
32 | #include "cx18-scb.h" | |
33 | #include "cx18-streams.h" | |
34 | #include "cx18-controls.h" | |
35 | #include "cx18-ioctl.h" | |
36 | #include "cx18-cards.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 | |
79f3e960 | 40 | associated VBI and IDX streams are also automatically claimed. |
1c1e45d1 HV |
41 | Possible error returns: -EBUSY if someone else has claimed |
42 | the stream or 0 on success. */ | |
8ef22f79 | 43 | int cx18_claim_stream(struct cx18_open_id *id, int type) |
1c1e45d1 HV |
44 | { |
45 | struct cx18 *cx = id->cx; | |
46 | struct cx18_stream *s = &cx->streams[type]; | |
79f3e960 AW |
47 | struct cx18_stream *s_assoc; |
48 | ||
49 | /* Nothing should ever try to directly claim the IDX stream */ | |
50 | if (type == CX18_ENC_STREAM_TYPE_IDX) { | |
51 | CX18_WARN("MPEG Index stream cannot be claimed " | |
52 | "directly, but something tried.\n"); | |
53 | return -EINVAL; | |
54 | } | |
1c1e45d1 HV |
55 | |
56 | if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
57 | /* someone already claimed this stream */ | |
58 | if (s->id == id->open_id) { | |
59 | /* yes, this file descriptor did. So that's OK. */ | |
60 | return 0; | |
61 | } | |
62 | if (s->id == -1 && type == CX18_ENC_STREAM_TYPE_VBI) { | |
63 | /* VBI is handled already internally, now also assign | |
64 | the file descriptor to this stream for external | |
65 | reading of the stream. */ | |
66 | s->id = id->open_id; | |
67 | CX18_DEBUG_INFO("Start Read VBI\n"); | |
68 | return 0; | |
69 | } | |
70 | /* someone else is using this stream already */ | |
71 | CX18_DEBUG_INFO("Stream %d is busy\n", type); | |
72 | return -EBUSY; | |
73 | } | |
74 | s->id = id->open_id; | |
75 | ||
79f3e960 AW |
76 | /* |
77 | * CX18_ENC_STREAM_TYPE_MPG needs to claim: | |
78 | * CX18_ENC_STREAM_TYPE_VBI, if VBI insertion is on for sliced VBI, or | |
79 | * CX18_ENC_STREAM_TYPE_IDX, if VBI insertion is off for sliced VBI | |
80 | * (We don't yet fix up MPEG Index entries for our inserted packets). | |
81 | * | |
82 | * For all other streams we're done. | |
83 | */ | |
84 | if (type != CX18_ENC_STREAM_TYPE_MPG) | |
85 | return 0; | |
86 | ||
87 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
88 | if (cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) | |
89 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
90 | else if (!cx18_stream_enabled(s_assoc)) | |
1c1e45d1 | 91 | return 0; |
1c1e45d1 | 92 | |
79f3e960 | 93 | set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); |
1c1e45d1 HV |
94 | |
95 | /* mark that it is used internally */ | |
79f3e960 | 96 | set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags); |
1c1e45d1 HV |
97 | return 0; |
98 | } | |
8ef22f79 | 99 | EXPORT_SYMBOL(cx18_claim_stream); |
1c1e45d1 HV |
100 | |
101 | /* This function releases a previously claimed stream. It will take into | |
102 | account associated VBI streams. */ | |
8ef22f79 | 103 | void cx18_release_stream(struct cx18_stream *s) |
1c1e45d1 HV |
104 | { |
105 | struct cx18 *cx = s->cx; | |
79f3e960 | 106 | struct cx18_stream *s_assoc; |
1c1e45d1 HV |
107 | |
108 | s->id = -1; | |
79f3e960 AW |
109 | if (s->type == CX18_ENC_STREAM_TYPE_IDX) { |
110 | /* | |
111 | * The IDX stream is only used internally, and can | |
112 | * only be indirectly unclaimed by unclaiming the MPG stream. | |
113 | */ | |
114 | return; | |
115 | } | |
116 | ||
1c1e45d1 HV |
117 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && |
118 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) { | |
119 | /* this stream is still in use internally */ | |
120 | return; | |
121 | } | |
122 | if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
123 | CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name); | |
124 | return; | |
125 | } | |
126 | ||
127 | cx18_flush_queues(s); | |
128 | ||
79f3e960 AW |
129 | /* |
130 | * CX18_ENC_STREAM_TYPE_MPG needs to release the | |
131 | * CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams. | |
132 | * | |
133 | * For all other streams we're done. | |
134 | */ | |
135 | if (s->type != CX18_ENC_STREAM_TYPE_MPG) | |
1c1e45d1 HV |
136 | return; |
137 | ||
79f3e960 AW |
138 | /* Unclaim the associated MPEG Index stream */ |
139 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
140 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
141 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
142 | cx18_flush_queues(s_assoc); | |
1c1e45d1 | 143 | } |
79f3e960 AW |
144 | |
145 | /* Unclaim the associated VBI stream */ | |
146 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
147 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
148 | if (s_assoc->id == -1) { | |
149 | /* | |
150 | * The VBI stream is not still claimed by a file | |
151 | * descriptor, so completely unclaim it. | |
152 | */ | |
153 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
154 | cx18_flush_queues(s_assoc); | |
155 | } | |
1c1e45d1 | 156 | } |
1c1e45d1 | 157 | } |
8ef22f79 | 158 | EXPORT_SYMBOL(cx18_release_stream); |
1c1e45d1 HV |
159 | |
160 | static void cx18_dualwatch(struct cx18 *cx) | |
161 | { | |
162 | struct v4l2_tuner vt; | |
0d82fe80 AW |
163 | u32 new_bitmap; |
164 | u32 new_stereo_mode; | |
165 | const u32 stereo_mask = 0x0300; | |
166 | const u32 dual = 0x0200; | |
d3c5e707 | 167 | u32 h; |
1c1e45d1 HV |
168 | |
169 | new_stereo_mode = cx->params.audio_properties & stereo_mask; | |
170 | memset(&vt, 0, sizeof(vt)); | |
ff2a2001 | 171 | cx18_call_all(cx, tuner, g_tuner, &vt); |
1c1e45d1 HV |
172 | if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && |
173 | (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) | |
174 | new_stereo_mode = dual; | |
175 | ||
176 | if (new_stereo_mode == cx->dualwatch_stereo_mode) | |
177 | return; | |
178 | ||
d3c5e707 AW |
179 | new_bitmap = new_stereo_mode |
180 | | (cx->params.audio_properties & ~stereo_mask); | |
1c1e45d1 | 181 | |
d3c5e707 AW |
182 | CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. " |
183 | "new audio_bitmask=0x%ux\n", | |
184 | cx->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); | |
1c1e45d1 | 185 | |
d3c5e707 AW |
186 | h = cx18_find_handle(cx); |
187 | if (h == CX18_INVALID_TASK_HANDLE) { | |
188 | CX18_DEBUG_INFO("dualwatch: can't find valid task handle\n"); | |
189 | return; | |
190 | } | |
191 | ||
192 | if (cx18_vapi(cx, | |
193 | CX18_CPU_SET_AUDIO_PARAMETERS, 2, h, new_bitmap) == 0) { | |
1c1e45d1 HV |
194 | cx->dualwatch_stereo_mode = new_stereo_mode; |
195 | return; | |
196 | } | |
197 | CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); | |
198 | } | |
199 | ||
200 | ||
52fcb3ec AW |
201 | static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block, |
202 | int *err) | |
1c1e45d1 HV |
203 | { |
204 | struct cx18 *cx = s->cx; | |
205 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
52fcb3ec | 206 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
207 | DEFINE_WAIT(wait); |
208 | ||
209 | *err = 0; | |
210 | while (1) { | |
211 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
9bff2d61 | 212 | /* Process pending program updates and VBI data */ |
1c1e45d1 HV |
213 | if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { |
214 | cx->dualwatch_jiffies = jiffies; | |
215 | cx18_dualwatch(cx); | |
216 | } | |
217 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
218 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
52fcb3ec AW |
219 | while ((mdl = cx18_dequeue(s_vbi, |
220 | &s_vbi->q_full))) { | |
1c1e45d1 | 221 | /* byteswap and process VBI data */ |
52fcb3ec | 222 | cx18_process_vbi_data(cx, mdl, |
af009cf6 | 223 | s_vbi->type); |
52fcb3ec | 224 | cx18_stream_put_mdl_fw(s_vbi, mdl); |
1c1e45d1 HV |
225 | } |
226 | } | |
52fcb3ec AW |
227 | mdl = &cx->vbi.sliced_mpeg_mdl; |
228 | if (mdl->readpos != mdl->bytesused) | |
229 | return mdl; | |
1c1e45d1 HV |
230 | } |
231 | ||
1c1e45d1 | 232 | /* do we have new data? */ |
52fcb3ec AW |
233 | mdl = cx18_dequeue(s, &s->q_full); |
234 | if (mdl) { | |
235 | if (!test_and_clear_bit(CX18_F_M_NEED_SWAP, | |
236 | &mdl->m_flags)) | |
237 | return mdl; | |
1c1e45d1 HV |
238 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) |
239 | /* byteswap MPG data */ | |
52fcb3ec | 240 | cx18_mdl_swap(mdl); |
1c1e45d1 HV |
241 | else { |
242 | /* byteswap and process VBI data */ | |
52fcb3ec | 243 | cx18_process_vbi_data(cx, mdl, s->type); |
1c1e45d1 | 244 | } |
52fcb3ec | 245 | return mdl; |
1c1e45d1 HV |
246 | } |
247 | ||
248 | /* return if end of stream */ | |
249 | if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
250 | CX18_DEBUG_INFO("EOS %s\n", s->name); | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | /* return if file was opened with O_NONBLOCK */ | |
255 | if (non_block) { | |
256 | *err = -EAGAIN; | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | /* wait for more data to arrive */ | |
261 | prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); | |
262 | /* New buffers might have become available before we were added | |
263 | to the waitqueue */ | |
c37b11bf | 264 | if (!atomic_read(&s->q_full.depth)) |
1c1e45d1 HV |
265 | schedule(); |
266 | finish_wait(&s->waitq, &wait); | |
267 | if (signal_pending(current)) { | |
268 | /* return if a signal was received */ | |
269 | CX18_DEBUG_INFO("User stopped %s\n", s->name); | |
270 | *err = -EINTR; | |
271 | return NULL; | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
52fcb3ec | 276 | static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx) |
1c1e45d1 | 277 | { |
52fcb3ec AW |
278 | struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl; |
279 | struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf; | |
1c1e45d1 HV |
280 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
281 | ||
52fcb3ec AW |
282 | buf->buf = cx->vbi.sliced_mpeg_data[idx]; |
283 | buf->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
284 | buf->readpos = 0; | |
285 | ||
286 | mdl->curr_buf = NULL; | |
287 | mdl->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
288 | mdl->readpos = 0; | |
1c1e45d1 HV |
289 | } |
290 | ||
291 | static size_t cx18_copy_buf_to_user(struct cx18_stream *s, | |
52fcb3ec | 292 | struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop) |
1c1e45d1 HV |
293 | { |
294 | struct cx18 *cx = s->cx; | |
295 | size_t len = buf->bytesused - buf->readpos; | |
296 | ||
52fcb3ec | 297 | *stop = false; |
1c1e45d1 HV |
298 | if (len > ucount) |
299 | len = ucount; | |
300 | if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && | |
dd073434 | 301 | !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { |
302df970 AW |
302 | /* |
303 | * Try to find a good splice point in the PS, just before | |
304 | * an MPEG-2 Program Pack start code, and provide only | |
305 | * up to that point to the user, so it's easy to insert VBI data | |
306 | * the next time around. | |
0c629252 AW |
307 | * |
308 | * This will not work for an MPEG-2 TS and has only been | |
309 | * verified by analysis to work for an MPEG-2 PS. Helen Buus | |
310 | * pointed out this works for the CX23416 MPEG-2 DVD compatible | |
311 | * stream, and research indicates both the MPEG 2 SVCD and DVD | |
312 | * stream types use an MPEG-2 PS container. | |
302df970 | 313 | */ |
302df970 AW |
314 | /* |
315 | * An MPEG-2 Program Stream (PS) is a series of | |
316 | * MPEG-2 Program Packs terminated by an | |
317 | * MPEG Program End Code after the last Program Pack. | |
318 | * A Program Pack may hold a PS System Header packet and any | |
319 | * number of Program Elementary Stream (PES) Packets | |
320 | */ | |
1c1e45d1 HV |
321 | const char *start = buf->buf + buf->readpos; |
322 | const char *p = start + 1; | |
323 | const u8 *q; | |
324 | u8 ch = cx->search_pack_header ? 0xba : 0xe0; | |
325 | int stuffing, i; | |
326 | ||
327 | while (start + len > p) { | |
302df970 | 328 | /* Scan for a 0 to find a potential MPEG-2 start code */ |
1c1e45d1 HV |
329 | q = memchr(p, 0, start + len - p); |
330 | if (q == NULL) | |
331 | break; | |
332 | p = q + 1; | |
302df970 AW |
333 | /* |
334 | * Keep looking if not a | |
335 | * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba | |
336 | * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 | |
337 | */ | |
1c1e45d1 HV |
338 | if ((char *)q + 15 >= buf->buf + buf->bytesused || |
339 | q[1] != 0 || q[2] != 1 || q[3] != ch) | |
340 | continue; | |
302df970 AW |
341 | |
342 | /* If expecting the primary video PES */ | |
1c1e45d1 | 343 | if (!cx->search_pack_header) { |
302df970 | 344 | /* Continue if it couldn't be a PES packet */ |
1c1e45d1 HV |
345 | if ((q[6] & 0xc0) != 0x80) |
346 | continue; | |
302df970 AW |
347 | /* Check if a PTS or PTS & DTS follow */ |
348 | if (((q[7] & 0xc0) == 0x80 && /* PTS only */ | |
349 | (q[9] & 0xf0) == 0x20) || /* PTS only */ | |
350 | ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ | |
351 | (q[9] & 0xf0) == 0x30)) { /* DTS follows */ | |
352 | /* Assume we found the video PES hdr */ | |
353 | ch = 0xba; /* next want a Program Pack*/ | |
1c1e45d1 | 354 | cx->search_pack_header = 1; |
302df970 | 355 | p = q + 9; /* Skip this video PES hdr */ |
1c1e45d1 HV |
356 | } |
357 | continue; | |
358 | } | |
302df970 AW |
359 | |
360 | /* We may have found a Program Pack start code */ | |
361 | ||
362 | /* Get the count of stuffing bytes & verify them */ | |
1c1e45d1 HV |
363 | stuffing = q[13] & 7; |
364 | /* all stuffing bytes must be 0xff */ | |
365 | for (i = 0; i < stuffing; i++) | |
366 | if (q[14 + i] != 0xff) | |
367 | break; | |
302df970 AW |
368 | if (i == stuffing && /* right number of stuffing bytes*/ |
369 | (q[4] & 0xc4) == 0x44 && /* marker check */ | |
370 | (q[12] & 3) == 3 && /* marker check */ | |
371 | q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ | |
1c1e45d1 HV |
372 | q[15 + stuffing] == 0 && |
373 | q[16 + stuffing] == 1) { | |
302df970 AW |
374 | /* We declare we actually found a Program Pack*/ |
375 | cx->search_pack_header = 0; /* expect vid PES */ | |
1c1e45d1 | 376 | len = (char *)q - start; |
52fcb3ec AW |
377 | cx18_setup_sliced_vbi_mdl(cx); |
378 | *stop = true; | |
1c1e45d1 HV |
379 | break; |
380 | } | |
381 | } | |
382 | } | |
383 | if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { | |
384 | CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n", | |
385 | len, s->name); | |
386 | return -EFAULT; | |
387 | } | |
388 | buf->readpos += len; | |
389 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
390 | buf != &cx->vbi.sliced_mpeg_buf) | |
391 | cx->mpg_data_received += len; | |
392 | return len; | |
393 | } | |
394 | ||
52fcb3ec AW |
395 | static size_t cx18_copy_mdl_to_user(struct cx18_stream *s, |
396 | struct cx18_mdl *mdl, char __user *ubuf, size_t ucount) | |
397 | { | |
398 | size_t tot_written = 0; | |
399 | int rc; | |
400 | bool stop = false; | |
401 | ||
402 | if (mdl->curr_buf == NULL) | |
403 | mdl->curr_buf = list_first_entry(&mdl->buf_list, | |
404 | struct cx18_buffer, list); | |
405 | ||
406 | if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) { | |
407 | /* | |
408 | * For some reason we've exhausted the buffers, but the MDL | |
409 | * object still said some data was unread. | |
410 | * Fix that and bail out. | |
411 | */ | |
412 | mdl->readpos = mdl->bytesused; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) { | |
417 | ||
418 | if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused) | |
419 | continue; | |
420 | ||
421 | rc = cx18_copy_buf_to_user(s, mdl->curr_buf, ubuf + tot_written, | |
422 | ucount - tot_written, &stop); | |
423 | if (rc < 0) | |
424 | return rc; | |
425 | mdl->readpos += rc; | |
426 | tot_written += rc; | |
427 | ||
428 | if (stop || /* Forced stopping point for VBI insertion */ | |
429 | tot_written >= ucount || /* Reader request statisfied */ | |
430 | mdl->curr_buf->readpos < mdl->curr_buf->bytesused || | |
431 | mdl->readpos >= mdl->bytesused) /* MDL buffers drained */ | |
432 | break; | |
433 | } | |
434 | return tot_written; | |
435 | } | |
436 | ||
1c1e45d1 HV |
437 | static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, |
438 | size_t tot_count, int non_block) | |
439 | { | |
440 | struct cx18 *cx = s->cx; | |
441 | size_t tot_written = 0; | |
442 | int single_frame = 0; | |
443 | ||
31554ae5 | 444 | if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) { |
1c1e45d1 HV |
445 | /* shouldn't happen */ |
446 | CX18_DEBUG_WARN("Stream %s not initialized before read\n", | |
447 | s->name); | |
448 | return -EIO; | |
449 | } | |
450 | ||
451 | /* Each VBI buffer is one frame, the v4l2 API says that for VBI the | |
452 | frames should arrive one-by-one, so make sure we never output more | |
453 | than one VBI frame at a time */ | |
dd073434 | 454 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx)) |
1c1e45d1 HV |
455 | single_frame = 1; |
456 | ||
457 | for (;;) { | |
52fcb3ec | 458 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
459 | int rc; |
460 | ||
52fcb3ec | 461 | mdl = cx18_get_mdl(s, non_block, &rc); |
1c1e45d1 | 462 | /* if there is no data available... */ |
52fcb3ec | 463 | if (mdl == NULL) { |
1c1e45d1 HV |
464 | /* if we got data, then return that regardless */ |
465 | if (tot_written) | |
466 | break; | |
467 | /* EOS condition */ | |
468 | if (rc == 0) { | |
469 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
470 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
471 | cx18_release_stream(s); | |
472 | } | |
473 | /* set errno */ | |
474 | return rc; | |
475 | } | |
476 | ||
52fcb3ec | 477 | rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written, |
1c1e45d1 HV |
478 | tot_count - tot_written); |
479 | ||
52fcb3ec AW |
480 | if (mdl != &cx->vbi.sliced_mpeg_mdl) { |
481 | if (mdl->readpos == mdl->bytesused) | |
482 | cx18_stream_put_mdl_fw(s, mdl); | |
66c2a6b0 | 483 | else |
52fcb3ec AW |
484 | cx18_push(s, mdl, &s->q_full); |
485 | } else if (mdl->readpos == mdl->bytesused) { | |
1c1e45d1 HV |
486 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
487 | ||
488 | cx->vbi.sliced_mpeg_size[idx] = 0; | |
489 | cx->vbi.inserted_frame++; | |
52fcb3ec | 490 | cx->vbi_data_inserted += mdl->bytesused; |
1c1e45d1 HV |
491 | } |
492 | if (rc < 0) | |
493 | return rc; | |
494 | tot_written += rc; | |
495 | ||
496 | if (tot_written == tot_count || single_frame) | |
497 | break; | |
498 | } | |
499 | return tot_written; | |
500 | } | |
501 | ||
502 | static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf, | |
503 | size_t count, loff_t *pos, int non_block) | |
504 | { | |
505 | ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0; | |
506 | struct cx18 *cx = s->cx; | |
507 | ||
508 | CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); | |
509 | if (rc > 0) | |
510 | pos += rc; | |
511 | return rc; | |
512 | } | |
513 | ||
514 | int cx18_start_capture(struct cx18_open_id *id) | |
515 | { | |
516 | struct cx18 *cx = id->cx; | |
517 | struct cx18_stream *s = &cx->streams[id->type]; | |
518 | struct cx18_stream *s_vbi; | |
79f3e960 | 519 | struct cx18_stream *s_idx; |
1c1e45d1 HV |
520 | |
521 | if (s->type == CX18_ENC_STREAM_TYPE_RAD) { | |
522 | /* you cannot read from these stream types. */ | |
523 | return -EPERM; | |
524 | } | |
525 | ||
526 | /* Try to claim this stream. */ | |
527 | if (cx18_claim_stream(id, s->type)) | |
528 | return -EBUSY; | |
529 | ||
530 | /* If capture is already in progress, then we also have to | |
531 | do nothing extra. */ | |
532 | if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || | |
533 | test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
534 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
535 | return 0; | |
536 | } | |
537 | ||
79f3e960 | 538 | /* Start associated VBI or IDX stream capture if required */ |
1c1e45d1 | 539 | s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
79f3e960 AW |
540 | s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; |
541 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
542 | /* | |
543 | * The VBI and IDX streams should have been claimed | |
544 | * automatically, if for internal use, when the MPG stream was | |
545 | * claimed. We only need to start these streams capturing. | |
546 | */ | |
547 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_idx->s_flags) && | |
548 | !test_and_set_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
549 | if (cx18_start_v4l2_encode_stream(s_idx)) { | |
550 | CX18_DEBUG_WARN("IDX capture start failed\n"); | |
551 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
552 | goto start_failed; | |
553 | } | |
554 | CX18_DEBUG_INFO("IDX capture started\n"); | |
555 | } | |
556 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
557 | !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { | |
558 | if (cx18_start_v4l2_encode_stream(s_vbi)) { | |
559 | CX18_DEBUG_WARN("VBI capture start failed\n"); | |
560 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
561 | goto start_failed; | |
562 | } | |
563 | CX18_DEBUG_INFO("VBI insertion started\n"); | |
1c1e45d1 | 564 | } |
1c1e45d1 HV |
565 | } |
566 | ||
567 | /* Tell the card to start capturing */ | |
568 | if (!cx18_start_v4l2_encode_stream(s)) { | |
569 | /* We're done */ | |
570 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
571 | /* Resume a possibly paused encoder */ | |
572 | if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags)) | |
573 | cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle); | |
574 | return 0; | |
575 | } | |
576 | ||
79f3e960 | 577 | start_failed: |
1c1e45d1 HV |
578 | CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); |
579 | ||
79f3e960 AW |
580 | /* |
581 | * The associated VBI and IDX streams for internal use are released | |
582 | * automatically when the MPG stream is released. We only need to stop | |
583 | * the associated stream. | |
584 | */ | |
585 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
586 | /* Stop the IDX stream which is always for internal use */ | |
587 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
588 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
589 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
590 | } | |
591 | /* Stop the VBI stream, if only running for internal use */ | |
592 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
593 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
594 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
595 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
596 | } | |
1c1e45d1 HV |
597 | } |
598 | clear_bit(CX18_F_S_STREAMING, &s->s_flags); | |
79f3e960 | 599 | cx18_release_stream(s); /* Also releases associated streams */ |
1c1e45d1 HV |
600 | return -EIO; |
601 | } | |
602 | ||
603 | ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, | |
604 | loff_t *pos) | |
605 | { | |
606 | struct cx18_open_id *id = filp->private_data; | |
607 | struct cx18 *cx = id->cx; | |
608 | struct cx18_stream *s = &cx->streams[id->type]; | |
609 | int rc; | |
610 | ||
611 | CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); | |
612 | ||
613 | mutex_lock(&cx->serialize_lock); | |
614 | rc = cx18_start_capture(id); | |
615 | mutex_unlock(&cx->serialize_lock); | |
616 | if (rc) | |
617 | return rc; | |
618 | return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); | |
619 | } | |
620 | ||
621 | unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) | |
622 | { | |
623 | struct cx18_open_id *id = filp->private_data; | |
624 | struct cx18 *cx = id->cx; | |
625 | struct cx18_stream *s = &cx->streams[id->type]; | |
626 | int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
627 | ||
628 | /* Start a capture if there is none */ | |
629 | if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
630 | int rc; | |
631 | ||
632 | mutex_lock(&cx->serialize_lock); | |
633 | rc = cx18_start_capture(id); | |
634 | mutex_unlock(&cx->serialize_lock); | |
635 | if (rc) { | |
636 | CX18_DEBUG_INFO("Could not start capture for %s (%d)\n", | |
637 | s->name, rc); | |
638 | return POLLERR; | |
639 | } | |
640 | CX18_DEBUG_FILE("Encoder poll started capture\n"); | |
641 | } | |
642 | ||
643 | /* add stream's waitq to the poll list */ | |
644 | CX18_DEBUG_HI_FILE("Encoder poll\n"); | |
645 | poll_wait(filp, &s->waitq, wait); | |
646 | ||
c37b11bf | 647 | if (atomic_read(&s->q_full.depth)) |
1c1e45d1 HV |
648 | return POLLIN | POLLRDNORM; |
649 | if (eof) | |
650 | return POLLHUP; | |
651 | return 0; | |
652 | } | |
653 | ||
654 | void cx18_stop_capture(struct cx18_open_id *id, int gop_end) | |
655 | { | |
656 | struct cx18 *cx = id->cx; | |
657 | struct cx18_stream *s = &cx->streams[id->type]; | |
79f3e960 AW |
658 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
659 | struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
1c1e45d1 HV |
660 | |
661 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
662 | ||
663 | /* 'Unclaim' this stream */ | |
664 | ||
665 | /* Stop capturing */ | |
666 | if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
1c1e45d1 | 667 | CX18_DEBUG_INFO("close stopping capture\n"); |
79f3e960 AW |
668 | if (id->type == CX18_ENC_STREAM_TYPE_MPG) { |
669 | /* Stop internal use associated VBI and IDX streams */ | |
670 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
671 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
672 | CX18_DEBUG_INFO("close stopping embedded VBI " | |
673 | "capture\n"); | |
674 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
675 | } | |
676 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
677 | CX18_DEBUG_INFO("close stopping IDX capture\n"); | |
678 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
679 | } | |
1c1e45d1 HV |
680 | } |
681 | if (id->type == CX18_ENC_STREAM_TYPE_VBI && | |
682 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) | |
683 | /* Also used internally, don't stop capturing */ | |
684 | s->id = -1; | |
685 | else | |
686 | cx18_stop_v4l2_encode_stream(s, gop_end); | |
687 | } | |
688 | if (!gop_end) { | |
689 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
690 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
691 | cx18_release_stream(s); | |
692 | } | |
693 | } | |
694 | ||
bec43661 | 695 | int cx18_v4l2_close(struct file *filp) |
1c1e45d1 HV |
696 | { |
697 | struct cx18_open_id *id = filp->private_data; | |
698 | struct cx18 *cx = id->cx; | |
699 | struct cx18_stream *s = &cx->streams[id->type]; | |
700 | ||
701 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
702 | ||
ffb4877b | 703 | v4l2_prio_close(&cx->prio, id->prio); |
1c1e45d1 HV |
704 | |
705 | /* Easy case first: this stream was never claimed by us */ | |
706 | if (s->id != id->open_id) { | |
707 | kfree(id); | |
708 | return 0; | |
709 | } | |
710 | ||
711 | /* 'Unclaim' this stream */ | |
712 | ||
713 | /* Stop radio */ | |
714 | mutex_lock(&cx->serialize_lock); | |
715 | if (id->type == CX18_ENC_STREAM_TYPE_RAD) { | |
716 | /* Closing radio device, return to TV mode */ | |
717 | cx18_mute(cx); | |
718 | /* Mark that the radio is no longer in use */ | |
719 | clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
720 | /* Switch tuner to TV */ | |
f41737ec | 721 | cx18_call_all(cx, core, s_std, cx->std); |
1c1e45d1 HV |
722 | /* Select correct audio input (i.e. TV tuner or Line in) */ |
723 | cx18_audio_set_io(cx); | |
31554ae5 | 724 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
725 | /* Undo video mute */ |
726 | cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, | |
727 | cx->params.video_mute | | |
728 | (cx->params.video_mute_yuv << 8)); | |
729 | } | |
730 | /* Done! Unmute and continue. */ | |
731 | cx18_unmute(cx); | |
732 | cx18_release_stream(s); | |
733 | } else { | |
734 | cx18_stop_capture(id, 0); | |
735 | } | |
736 | kfree(id); | |
737 | mutex_unlock(&cx->serialize_lock); | |
738 | return 0; | |
739 | } | |
740 | ||
741 | static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) | |
742 | { | |
743 | struct cx18 *cx = s->cx; | |
744 | struct cx18_open_id *item; | |
745 | ||
746 | CX18_DEBUG_FILE("open %s\n", s->name); | |
747 | ||
748 | /* Allocate memory */ | |
749 | item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL); | |
750 | if (NULL == item) { | |
751 | CX18_DEBUG_WARN("nomem on v4l2 open\n"); | |
752 | return -ENOMEM; | |
753 | } | |
754 | item->cx = cx; | |
755 | item->type = s->type; | |
756 | v4l2_prio_open(&cx->prio, &item->prio); | |
757 | ||
758 | item->open_id = cx->open_id++; | |
759 | filp->private_data = item; | |
760 | ||
761 | if (item->type == CX18_ENC_STREAM_TYPE_RAD) { | |
762 | /* Try to claim this stream */ | |
763 | if (cx18_claim_stream(item, item->type)) { | |
764 | /* No, it's already in use */ | |
765 | kfree(item); | |
766 | return -EBUSY; | |
767 | } | |
768 | ||
769 | if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { | |
31554ae5 | 770 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
771 | /* switching to radio while capture is |
772 | in progress is not polite */ | |
773 | cx18_release_stream(s); | |
774 | kfree(item); | |
775 | return -EBUSY; | |
776 | } | |
777 | } | |
778 | ||
779 | /* Mark that the radio is being used. */ | |
780 | set_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
781 | /* We have the radio */ | |
782 | cx18_mute(cx); | |
783 | /* Switch tuner to radio */ | |
ff2a2001 | 784 | cx18_call_all(cx, tuner, s_radio); |
1c1e45d1 HV |
785 | /* Select the correct audio input (i.e. radio tuner) */ |
786 | cx18_audio_set_io(cx); | |
787 | /* Done! Unmute and continue. */ | |
788 | cx18_unmute(cx); | |
789 | } | |
790 | return 0; | |
791 | } | |
792 | ||
bec43661 | 793 | int cx18_v4l2_open(struct file *filp) |
1c1e45d1 | 794 | { |
5811cf99 AW |
795 | int res; |
796 | struct video_device *video_dev = video_devdata(filp); | |
797 | struct cx18_stream *s = video_get_drvdata(video_dev); | |
32a60955 | 798 | struct cx18 *cx = s->cx; |
1c1e45d1 HV |
799 | |
800 | mutex_lock(&cx->serialize_lock); | |
801 | if (cx18_init_on_first_open(cx)) { | |
50462eb0 LP |
802 | CX18_ERR("Failed to initialize on %s\n", |
803 | video_device_node_name(video_dev)); | |
1c1e45d1 HV |
804 | mutex_unlock(&cx->serialize_lock); |
805 | return -ENXIO; | |
806 | } | |
807 | res = cx18_serialized_open(s, filp); | |
808 | mutex_unlock(&cx->serialize_lock); | |
809 | return res; | |
810 | } | |
811 | ||
812 | void cx18_mute(struct cx18 *cx) | |
813 | { | |
d3c5e707 AW |
814 | u32 h; |
815 | if (atomic_read(&cx->ana_capturing)) { | |
816 | h = cx18_find_handle(cx); | |
817 | if (h != CX18_INVALID_TASK_HANDLE) | |
818 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1); | |
819 | else | |
820 | CX18_ERR("Can't find valid task handle for mute\n"); | |
821 | } | |
1c1e45d1 HV |
822 | CX18_DEBUG_INFO("Mute\n"); |
823 | } | |
824 | ||
825 | void cx18_unmute(struct cx18 *cx) | |
826 | { | |
d3c5e707 | 827 | u32 h; |
31554ae5 | 828 | if (atomic_read(&cx->ana_capturing)) { |
d3c5e707 AW |
829 | h = cx18_find_handle(cx); |
830 | if (h != CX18_INVALID_TASK_HANDLE) { | |
831 | cx18_msleep_timeout(100, 0); | |
832 | cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12); | |
833 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0); | |
834 | } else | |
835 | CX18_ERR("Can't find valid task handle for unmute\n"); | |
1c1e45d1 HV |
836 | } |
837 | CX18_DEBUG_INFO("Unmute\n"); | |
838 | } |