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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> | |
1ed9dcc8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@radix.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. */ | |
50510993 | 43 | static 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 | } | |
99 | ||
100 | /* This function releases a previously claimed stream. It will take into | |
101 | account associated VBI streams. */ | |
50510993 | 102 | static void cx18_release_stream(struct cx18_stream *s) |
1c1e45d1 HV |
103 | { |
104 | struct cx18 *cx = s->cx; | |
79f3e960 | 105 | struct cx18_stream *s_assoc; |
1c1e45d1 HV |
106 | |
107 | s->id = -1; | |
79f3e960 AW |
108 | if (s->type == CX18_ENC_STREAM_TYPE_IDX) { |
109 | /* | |
110 | * The IDX stream is only used internally, and can | |
111 | * only be indirectly unclaimed by unclaiming the MPG stream. | |
112 | */ | |
113 | return; | |
114 | } | |
115 | ||
1c1e45d1 HV |
116 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && |
117 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) { | |
118 | /* this stream is still in use internally */ | |
119 | return; | |
120 | } | |
121 | if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
122 | CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name); | |
123 | return; | |
124 | } | |
125 | ||
126 | cx18_flush_queues(s); | |
127 | ||
79f3e960 AW |
128 | /* |
129 | * CX18_ENC_STREAM_TYPE_MPG needs to release the | |
130 | * CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams. | |
131 | * | |
132 | * For all other streams we're done. | |
133 | */ | |
134 | if (s->type != CX18_ENC_STREAM_TYPE_MPG) | |
1c1e45d1 HV |
135 | return; |
136 | ||
79f3e960 AW |
137 | /* Unclaim the associated MPEG Index stream */ |
138 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
139 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
140 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
141 | cx18_flush_queues(s_assoc); | |
1c1e45d1 | 142 | } |
79f3e960 AW |
143 | |
144 | /* Unclaim the associated VBI stream */ | |
145 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
146 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
147 | if (s_assoc->id == -1) { | |
148 | /* | |
149 | * The VBI stream is not still claimed by a file | |
150 | * descriptor, so completely unclaim it. | |
151 | */ | |
152 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
153 | cx18_flush_queues(s_assoc); | |
154 | } | |
1c1e45d1 | 155 | } |
1c1e45d1 HV |
156 | } |
157 | ||
158 | static void cx18_dualwatch(struct cx18 *cx) | |
159 | { | |
160 | struct v4l2_tuner vt; | |
0d82fe80 AW |
161 | u32 new_bitmap; |
162 | u32 new_stereo_mode; | |
163 | const u32 stereo_mask = 0x0300; | |
164 | const u32 dual = 0x0200; | |
d3c5e707 | 165 | u32 h; |
1c1e45d1 HV |
166 | |
167 | new_stereo_mode = cx->params.audio_properties & stereo_mask; | |
168 | memset(&vt, 0, sizeof(vt)); | |
ff2a2001 | 169 | cx18_call_all(cx, tuner, g_tuner, &vt); |
1c1e45d1 HV |
170 | if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && |
171 | (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) | |
172 | new_stereo_mode = dual; | |
173 | ||
174 | if (new_stereo_mode == cx->dualwatch_stereo_mode) | |
175 | return; | |
176 | ||
d3c5e707 AW |
177 | new_bitmap = new_stereo_mode |
178 | | (cx->params.audio_properties & ~stereo_mask); | |
1c1e45d1 | 179 | |
d3c5e707 AW |
180 | CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. " |
181 | "new audio_bitmask=0x%ux\n", | |
182 | cx->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); | |
1c1e45d1 | 183 | |
d3c5e707 AW |
184 | h = cx18_find_handle(cx); |
185 | if (h == CX18_INVALID_TASK_HANDLE) { | |
186 | CX18_DEBUG_INFO("dualwatch: can't find valid task handle\n"); | |
187 | return; | |
188 | } | |
189 | ||
190 | if (cx18_vapi(cx, | |
191 | CX18_CPU_SET_AUDIO_PARAMETERS, 2, h, new_bitmap) == 0) { | |
1c1e45d1 HV |
192 | cx->dualwatch_stereo_mode = new_stereo_mode; |
193 | return; | |
194 | } | |
195 | CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); | |
196 | } | |
197 | ||
198 | ||
52fcb3ec AW |
199 | static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block, |
200 | int *err) | |
1c1e45d1 HV |
201 | { |
202 | struct cx18 *cx = s->cx; | |
203 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
52fcb3ec | 204 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
205 | DEFINE_WAIT(wait); |
206 | ||
207 | *err = 0; | |
208 | while (1) { | |
209 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
9bff2d61 | 210 | /* Process pending program updates and VBI data */ |
1c1e45d1 HV |
211 | if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { |
212 | cx->dualwatch_jiffies = jiffies; | |
213 | cx18_dualwatch(cx); | |
214 | } | |
215 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
216 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
52fcb3ec AW |
217 | while ((mdl = cx18_dequeue(s_vbi, |
218 | &s_vbi->q_full))) { | |
1c1e45d1 | 219 | /* byteswap and process VBI data */ |
52fcb3ec | 220 | cx18_process_vbi_data(cx, mdl, |
af009cf6 | 221 | s_vbi->type); |
52fcb3ec | 222 | cx18_stream_put_mdl_fw(s_vbi, mdl); |
1c1e45d1 HV |
223 | } |
224 | } | |
52fcb3ec AW |
225 | mdl = &cx->vbi.sliced_mpeg_mdl; |
226 | if (mdl->readpos != mdl->bytesused) | |
227 | return mdl; | |
1c1e45d1 HV |
228 | } |
229 | ||
1c1e45d1 | 230 | /* do we have new data? */ |
52fcb3ec AW |
231 | mdl = cx18_dequeue(s, &s->q_full); |
232 | if (mdl) { | |
233 | if (!test_and_clear_bit(CX18_F_M_NEED_SWAP, | |
234 | &mdl->m_flags)) | |
235 | return mdl; | |
1c1e45d1 HV |
236 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) |
237 | /* byteswap MPG data */ | |
52fcb3ec | 238 | cx18_mdl_swap(mdl); |
1c1e45d1 HV |
239 | else { |
240 | /* byteswap and process VBI data */ | |
52fcb3ec | 241 | cx18_process_vbi_data(cx, mdl, s->type); |
1c1e45d1 | 242 | } |
52fcb3ec | 243 | return mdl; |
1c1e45d1 HV |
244 | } |
245 | ||
246 | /* return if end of stream */ | |
247 | if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
248 | CX18_DEBUG_INFO("EOS %s\n", s->name); | |
249 | return NULL; | |
250 | } | |
251 | ||
252 | /* return if file was opened with O_NONBLOCK */ | |
253 | if (non_block) { | |
254 | *err = -EAGAIN; | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | /* wait for more data to arrive */ | |
259 | prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); | |
260 | /* New buffers might have become available before we were added | |
261 | to the waitqueue */ | |
c37b11bf | 262 | if (!atomic_read(&s->q_full.depth)) |
1c1e45d1 HV |
263 | schedule(); |
264 | finish_wait(&s->waitq, &wait); | |
265 | if (signal_pending(current)) { | |
266 | /* return if a signal was received */ | |
267 | CX18_DEBUG_INFO("User stopped %s\n", s->name); | |
268 | *err = -EINTR; | |
269 | return NULL; | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
52fcb3ec | 274 | static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx) |
1c1e45d1 | 275 | { |
52fcb3ec AW |
276 | struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl; |
277 | struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf; | |
1c1e45d1 HV |
278 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
279 | ||
52fcb3ec AW |
280 | buf->buf = cx->vbi.sliced_mpeg_data[idx]; |
281 | buf->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
282 | buf->readpos = 0; | |
283 | ||
284 | mdl->curr_buf = NULL; | |
285 | mdl->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
286 | mdl->readpos = 0; | |
1c1e45d1 HV |
287 | } |
288 | ||
289 | static size_t cx18_copy_buf_to_user(struct cx18_stream *s, | |
52fcb3ec | 290 | struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop) |
1c1e45d1 HV |
291 | { |
292 | struct cx18 *cx = s->cx; | |
293 | size_t len = buf->bytesused - buf->readpos; | |
294 | ||
52fcb3ec | 295 | *stop = false; |
1c1e45d1 HV |
296 | if (len > ucount) |
297 | len = ucount; | |
298 | if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && | |
dd073434 | 299 | !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { |
302df970 AW |
300 | /* |
301 | * Try to find a good splice point in the PS, just before | |
302 | * an MPEG-2 Program Pack start code, and provide only | |
303 | * up to that point to the user, so it's easy to insert VBI data | |
304 | * the next time around. | |
0c629252 AW |
305 | * |
306 | * This will not work for an MPEG-2 TS and has only been | |
307 | * verified by analysis to work for an MPEG-2 PS. Helen Buus | |
308 | * pointed out this works for the CX23416 MPEG-2 DVD compatible | |
309 | * stream, and research indicates both the MPEG 2 SVCD and DVD | |
310 | * stream types use an MPEG-2 PS container. | |
302df970 | 311 | */ |
302df970 AW |
312 | /* |
313 | * An MPEG-2 Program Stream (PS) is a series of | |
314 | * MPEG-2 Program Packs terminated by an | |
315 | * MPEG Program End Code after the last Program Pack. | |
316 | * A Program Pack may hold a PS System Header packet and any | |
317 | * number of Program Elementary Stream (PES) Packets | |
318 | */ | |
1c1e45d1 HV |
319 | const char *start = buf->buf + buf->readpos; |
320 | const char *p = start + 1; | |
321 | const u8 *q; | |
322 | u8 ch = cx->search_pack_header ? 0xba : 0xe0; | |
323 | int stuffing, i; | |
324 | ||
325 | while (start + len > p) { | |
302df970 | 326 | /* Scan for a 0 to find a potential MPEG-2 start code */ |
1c1e45d1 HV |
327 | q = memchr(p, 0, start + len - p); |
328 | if (q == NULL) | |
329 | break; | |
330 | p = q + 1; | |
302df970 AW |
331 | /* |
332 | * Keep looking if not a | |
333 | * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba | |
334 | * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 | |
335 | */ | |
1c1e45d1 HV |
336 | if ((char *)q + 15 >= buf->buf + buf->bytesused || |
337 | q[1] != 0 || q[2] != 1 || q[3] != ch) | |
338 | continue; | |
302df970 AW |
339 | |
340 | /* If expecting the primary video PES */ | |
1c1e45d1 | 341 | if (!cx->search_pack_header) { |
302df970 | 342 | /* Continue if it couldn't be a PES packet */ |
1c1e45d1 HV |
343 | if ((q[6] & 0xc0) != 0x80) |
344 | continue; | |
302df970 AW |
345 | /* Check if a PTS or PTS & DTS follow */ |
346 | if (((q[7] & 0xc0) == 0x80 && /* PTS only */ | |
347 | (q[9] & 0xf0) == 0x20) || /* PTS only */ | |
348 | ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ | |
349 | (q[9] & 0xf0) == 0x30)) { /* DTS follows */ | |
350 | /* Assume we found the video PES hdr */ | |
351 | ch = 0xba; /* next want a Program Pack*/ | |
1c1e45d1 | 352 | cx->search_pack_header = 1; |
302df970 | 353 | p = q + 9; /* Skip this video PES hdr */ |
1c1e45d1 HV |
354 | } |
355 | continue; | |
356 | } | |
302df970 AW |
357 | |
358 | /* We may have found a Program Pack start code */ | |
359 | ||
360 | /* Get the count of stuffing bytes & verify them */ | |
1c1e45d1 HV |
361 | stuffing = q[13] & 7; |
362 | /* all stuffing bytes must be 0xff */ | |
363 | for (i = 0; i < stuffing; i++) | |
364 | if (q[14 + i] != 0xff) | |
365 | break; | |
302df970 AW |
366 | if (i == stuffing && /* right number of stuffing bytes*/ |
367 | (q[4] & 0xc4) == 0x44 && /* marker check */ | |
368 | (q[12] & 3) == 3 && /* marker check */ | |
369 | q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ | |
1c1e45d1 HV |
370 | q[15 + stuffing] == 0 && |
371 | q[16 + stuffing] == 1) { | |
302df970 AW |
372 | /* We declare we actually found a Program Pack*/ |
373 | cx->search_pack_header = 0; /* expect vid PES */ | |
1c1e45d1 | 374 | len = (char *)q - start; |
52fcb3ec AW |
375 | cx18_setup_sliced_vbi_mdl(cx); |
376 | *stop = true; | |
1c1e45d1 HV |
377 | break; |
378 | } | |
379 | } | |
380 | } | |
381 | if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { | |
382 | CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n", | |
383 | len, s->name); | |
384 | return -EFAULT; | |
385 | } | |
386 | buf->readpos += len; | |
387 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
388 | buf != &cx->vbi.sliced_mpeg_buf) | |
389 | cx->mpg_data_received += len; | |
390 | return len; | |
391 | } | |
392 | ||
52fcb3ec AW |
393 | static size_t cx18_copy_mdl_to_user(struct cx18_stream *s, |
394 | struct cx18_mdl *mdl, char __user *ubuf, size_t ucount) | |
395 | { | |
396 | size_t tot_written = 0; | |
397 | int rc; | |
398 | bool stop = false; | |
399 | ||
400 | if (mdl->curr_buf == NULL) | |
401 | mdl->curr_buf = list_first_entry(&mdl->buf_list, | |
402 | struct cx18_buffer, list); | |
403 | ||
404 | if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) { | |
405 | /* | |
406 | * For some reason we've exhausted the buffers, but the MDL | |
407 | * object still said some data was unread. | |
408 | * Fix that and bail out. | |
409 | */ | |
410 | mdl->readpos = mdl->bytesused; | |
411 | return 0; | |
412 | } | |
413 | ||
414 | list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) { | |
415 | ||
416 | if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused) | |
417 | continue; | |
418 | ||
419 | rc = cx18_copy_buf_to_user(s, mdl->curr_buf, ubuf + tot_written, | |
420 | ucount - tot_written, &stop); | |
421 | if (rc < 0) | |
422 | return rc; | |
423 | mdl->readpos += rc; | |
424 | tot_written += rc; | |
425 | ||
426 | if (stop || /* Forced stopping point for VBI insertion */ | |
427 | tot_written >= ucount || /* Reader request statisfied */ | |
428 | mdl->curr_buf->readpos < mdl->curr_buf->bytesused || | |
429 | mdl->readpos >= mdl->bytesused) /* MDL buffers drained */ | |
430 | break; | |
431 | } | |
432 | return tot_written; | |
433 | } | |
434 | ||
1c1e45d1 HV |
435 | static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, |
436 | size_t tot_count, int non_block) | |
437 | { | |
438 | struct cx18 *cx = s->cx; | |
439 | size_t tot_written = 0; | |
440 | int single_frame = 0; | |
441 | ||
31554ae5 | 442 | if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) { |
1c1e45d1 HV |
443 | /* shouldn't happen */ |
444 | CX18_DEBUG_WARN("Stream %s not initialized before read\n", | |
445 | s->name); | |
446 | return -EIO; | |
447 | } | |
448 | ||
449 | /* Each VBI buffer is one frame, the v4l2 API says that for VBI the | |
450 | frames should arrive one-by-one, so make sure we never output more | |
451 | than one VBI frame at a time */ | |
dd073434 | 452 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx)) |
1c1e45d1 HV |
453 | single_frame = 1; |
454 | ||
455 | for (;;) { | |
52fcb3ec | 456 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
457 | int rc; |
458 | ||
52fcb3ec | 459 | mdl = cx18_get_mdl(s, non_block, &rc); |
1c1e45d1 | 460 | /* if there is no data available... */ |
52fcb3ec | 461 | if (mdl == NULL) { |
1c1e45d1 HV |
462 | /* if we got data, then return that regardless */ |
463 | if (tot_written) | |
464 | break; | |
465 | /* EOS condition */ | |
466 | if (rc == 0) { | |
467 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
468 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
469 | cx18_release_stream(s); | |
470 | } | |
471 | /* set errno */ | |
472 | return rc; | |
473 | } | |
474 | ||
52fcb3ec | 475 | rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written, |
1c1e45d1 HV |
476 | tot_count - tot_written); |
477 | ||
52fcb3ec AW |
478 | if (mdl != &cx->vbi.sliced_mpeg_mdl) { |
479 | if (mdl->readpos == mdl->bytesused) | |
480 | cx18_stream_put_mdl_fw(s, mdl); | |
66c2a6b0 | 481 | else |
52fcb3ec AW |
482 | cx18_push(s, mdl, &s->q_full); |
483 | } else if (mdl->readpos == mdl->bytesused) { | |
1c1e45d1 HV |
484 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
485 | ||
486 | cx->vbi.sliced_mpeg_size[idx] = 0; | |
487 | cx->vbi.inserted_frame++; | |
52fcb3ec | 488 | cx->vbi_data_inserted += mdl->bytesused; |
1c1e45d1 HV |
489 | } |
490 | if (rc < 0) | |
491 | return rc; | |
492 | tot_written += rc; | |
493 | ||
494 | if (tot_written == tot_count || single_frame) | |
495 | break; | |
496 | } | |
497 | return tot_written; | |
498 | } | |
499 | ||
500 | static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf, | |
501 | size_t count, loff_t *pos, int non_block) | |
502 | { | |
503 | ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0; | |
504 | struct cx18 *cx = s->cx; | |
505 | ||
506 | CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); | |
507 | if (rc > 0) | |
508 | pos += rc; | |
509 | return rc; | |
510 | } | |
511 | ||
512 | int cx18_start_capture(struct cx18_open_id *id) | |
513 | { | |
514 | struct cx18 *cx = id->cx; | |
515 | struct cx18_stream *s = &cx->streams[id->type]; | |
516 | struct cx18_stream *s_vbi; | |
79f3e960 | 517 | struct cx18_stream *s_idx; |
1c1e45d1 HV |
518 | |
519 | if (s->type == CX18_ENC_STREAM_TYPE_RAD) { | |
520 | /* you cannot read from these stream types. */ | |
521 | return -EPERM; | |
522 | } | |
523 | ||
524 | /* Try to claim this stream. */ | |
525 | if (cx18_claim_stream(id, s->type)) | |
526 | return -EBUSY; | |
527 | ||
528 | /* If capture is already in progress, then we also have to | |
529 | do nothing extra. */ | |
530 | if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || | |
531 | test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
532 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
533 | return 0; | |
534 | } | |
535 | ||
79f3e960 | 536 | /* Start associated VBI or IDX stream capture if required */ |
1c1e45d1 | 537 | s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
79f3e960 AW |
538 | s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; |
539 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
540 | /* | |
541 | * The VBI and IDX streams should have been claimed | |
542 | * automatically, if for internal use, when the MPG stream was | |
543 | * claimed. We only need to start these streams capturing. | |
544 | */ | |
545 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_idx->s_flags) && | |
546 | !test_and_set_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
547 | if (cx18_start_v4l2_encode_stream(s_idx)) { | |
548 | CX18_DEBUG_WARN("IDX capture start failed\n"); | |
549 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
550 | goto start_failed; | |
551 | } | |
552 | CX18_DEBUG_INFO("IDX capture started\n"); | |
553 | } | |
554 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
555 | !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { | |
556 | if (cx18_start_v4l2_encode_stream(s_vbi)) { | |
557 | CX18_DEBUG_WARN("VBI capture start failed\n"); | |
558 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
559 | goto start_failed; | |
560 | } | |
561 | CX18_DEBUG_INFO("VBI insertion started\n"); | |
1c1e45d1 | 562 | } |
1c1e45d1 HV |
563 | } |
564 | ||
565 | /* Tell the card to start capturing */ | |
566 | if (!cx18_start_v4l2_encode_stream(s)) { | |
567 | /* We're done */ | |
568 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
569 | /* Resume a possibly paused encoder */ | |
570 | if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags)) | |
571 | cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle); | |
572 | return 0; | |
573 | } | |
574 | ||
79f3e960 | 575 | start_failed: |
1c1e45d1 HV |
576 | CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); |
577 | ||
79f3e960 AW |
578 | /* |
579 | * The associated VBI and IDX streams for internal use are released | |
580 | * automatically when the MPG stream is released. We only need to stop | |
581 | * the associated stream. | |
582 | */ | |
583 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
584 | /* Stop the IDX stream which is always for internal use */ | |
585 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
586 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
587 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
588 | } | |
589 | /* Stop the VBI stream, if only running for internal use */ | |
590 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
591 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
592 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
593 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
594 | } | |
1c1e45d1 HV |
595 | } |
596 | clear_bit(CX18_F_S_STREAMING, &s->s_flags); | |
79f3e960 | 597 | cx18_release_stream(s); /* Also releases associated streams */ |
1c1e45d1 HV |
598 | return -EIO; |
599 | } | |
600 | ||
601 | ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, | |
602 | loff_t *pos) | |
603 | { | |
604 | struct cx18_open_id *id = filp->private_data; | |
605 | struct cx18 *cx = id->cx; | |
606 | struct cx18_stream *s = &cx->streams[id->type]; | |
607 | int rc; | |
608 | ||
609 | CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); | |
610 | ||
611 | mutex_lock(&cx->serialize_lock); | |
612 | rc = cx18_start_capture(id); | |
613 | mutex_unlock(&cx->serialize_lock); | |
614 | if (rc) | |
615 | return rc; | |
616 | return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); | |
617 | } | |
618 | ||
619 | unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) | |
620 | { | |
621 | struct cx18_open_id *id = filp->private_data; | |
622 | struct cx18 *cx = id->cx; | |
623 | struct cx18_stream *s = &cx->streams[id->type]; | |
624 | int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
625 | ||
626 | /* Start a capture if there is none */ | |
627 | if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
628 | int rc; | |
629 | ||
630 | mutex_lock(&cx->serialize_lock); | |
631 | rc = cx18_start_capture(id); | |
632 | mutex_unlock(&cx->serialize_lock); | |
633 | if (rc) { | |
634 | CX18_DEBUG_INFO("Could not start capture for %s (%d)\n", | |
635 | s->name, rc); | |
636 | return POLLERR; | |
637 | } | |
638 | CX18_DEBUG_FILE("Encoder poll started capture\n"); | |
639 | } | |
640 | ||
641 | /* add stream's waitq to the poll list */ | |
642 | CX18_DEBUG_HI_FILE("Encoder poll\n"); | |
643 | poll_wait(filp, &s->waitq, wait); | |
644 | ||
c37b11bf | 645 | if (atomic_read(&s->q_full.depth)) |
1c1e45d1 HV |
646 | return POLLIN | POLLRDNORM; |
647 | if (eof) | |
648 | return POLLHUP; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | void cx18_stop_capture(struct cx18_open_id *id, int gop_end) | |
653 | { | |
654 | struct cx18 *cx = id->cx; | |
655 | struct cx18_stream *s = &cx->streams[id->type]; | |
79f3e960 AW |
656 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
657 | struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
1c1e45d1 HV |
658 | |
659 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
660 | ||
661 | /* 'Unclaim' this stream */ | |
662 | ||
663 | /* Stop capturing */ | |
664 | if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
1c1e45d1 | 665 | CX18_DEBUG_INFO("close stopping capture\n"); |
79f3e960 AW |
666 | if (id->type == CX18_ENC_STREAM_TYPE_MPG) { |
667 | /* Stop internal use associated VBI and IDX streams */ | |
668 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
669 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
670 | CX18_DEBUG_INFO("close stopping embedded VBI " | |
671 | "capture\n"); | |
672 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
673 | } | |
674 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
675 | CX18_DEBUG_INFO("close stopping IDX capture\n"); | |
676 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
677 | } | |
1c1e45d1 HV |
678 | } |
679 | if (id->type == CX18_ENC_STREAM_TYPE_VBI && | |
680 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) | |
681 | /* Also used internally, don't stop capturing */ | |
682 | s->id = -1; | |
683 | else | |
684 | cx18_stop_v4l2_encode_stream(s, gop_end); | |
685 | } | |
686 | if (!gop_end) { | |
687 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
688 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
689 | cx18_release_stream(s); | |
690 | } | |
691 | } | |
692 | ||
bec43661 | 693 | int cx18_v4l2_close(struct file *filp) |
1c1e45d1 HV |
694 | { |
695 | struct cx18_open_id *id = filp->private_data; | |
696 | struct cx18 *cx = id->cx; | |
697 | struct cx18_stream *s = &cx->streams[id->type]; | |
698 | ||
699 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
700 | ||
701 | v4l2_prio_close(&cx->prio, &id->prio); | |
702 | ||
703 | /* Easy case first: this stream was never claimed by us */ | |
704 | if (s->id != id->open_id) { | |
705 | kfree(id); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | /* 'Unclaim' this stream */ | |
710 | ||
711 | /* Stop radio */ | |
712 | mutex_lock(&cx->serialize_lock); | |
713 | if (id->type == CX18_ENC_STREAM_TYPE_RAD) { | |
714 | /* Closing radio device, return to TV mode */ | |
715 | cx18_mute(cx); | |
716 | /* Mark that the radio is no longer in use */ | |
717 | clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
718 | /* Switch tuner to TV */ | |
f41737ec | 719 | cx18_call_all(cx, core, s_std, cx->std); |
1c1e45d1 HV |
720 | /* Select correct audio input (i.e. TV tuner or Line in) */ |
721 | cx18_audio_set_io(cx); | |
31554ae5 | 722 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
723 | /* Undo video mute */ |
724 | cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, | |
725 | cx->params.video_mute | | |
726 | (cx->params.video_mute_yuv << 8)); | |
727 | } | |
728 | /* Done! Unmute and continue. */ | |
729 | cx18_unmute(cx); | |
730 | cx18_release_stream(s); | |
731 | } else { | |
732 | cx18_stop_capture(id, 0); | |
733 | } | |
734 | kfree(id); | |
735 | mutex_unlock(&cx->serialize_lock); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) | |
740 | { | |
741 | struct cx18 *cx = s->cx; | |
742 | struct cx18_open_id *item; | |
743 | ||
744 | CX18_DEBUG_FILE("open %s\n", s->name); | |
745 | ||
746 | /* Allocate memory */ | |
747 | item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL); | |
748 | if (NULL == item) { | |
749 | CX18_DEBUG_WARN("nomem on v4l2 open\n"); | |
750 | return -ENOMEM; | |
751 | } | |
752 | item->cx = cx; | |
753 | item->type = s->type; | |
754 | v4l2_prio_open(&cx->prio, &item->prio); | |
755 | ||
756 | item->open_id = cx->open_id++; | |
757 | filp->private_data = item; | |
758 | ||
759 | if (item->type == CX18_ENC_STREAM_TYPE_RAD) { | |
760 | /* Try to claim this stream */ | |
761 | if (cx18_claim_stream(item, item->type)) { | |
762 | /* No, it's already in use */ | |
763 | kfree(item); | |
764 | return -EBUSY; | |
765 | } | |
766 | ||
767 | if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { | |
31554ae5 | 768 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
769 | /* switching to radio while capture is |
770 | in progress is not polite */ | |
771 | cx18_release_stream(s); | |
772 | kfree(item); | |
773 | return -EBUSY; | |
774 | } | |
775 | } | |
776 | ||
777 | /* Mark that the radio is being used. */ | |
778 | set_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
779 | /* We have the radio */ | |
780 | cx18_mute(cx); | |
781 | /* Switch tuner to radio */ | |
ff2a2001 | 782 | cx18_call_all(cx, tuner, s_radio); |
1c1e45d1 HV |
783 | /* Select the correct audio input (i.e. radio tuner) */ |
784 | cx18_audio_set_io(cx); | |
785 | /* Done! Unmute and continue. */ | |
786 | cx18_unmute(cx); | |
787 | } | |
788 | return 0; | |
789 | } | |
790 | ||
bec43661 | 791 | int cx18_v4l2_open(struct file *filp) |
1c1e45d1 | 792 | { |
5811cf99 AW |
793 | int res; |
794 | struct video_device *video_dev = video_devdata(filp); | |
795 | struct cx18_stream *s = video_get_drvdata(video_dev); | |
32a60955 | 796 | struct cx18 *cx = s->cx; |
1c1e45d1 HV |
797 | |
798 | mutex_lock(&cx->serialize_lock); | |
799 | if (cx18_init_on_first_open(cx)) { | |
50462eb0 LP |
800 | CX18_ERR("Failed to initialize on %s\n", |
801 | video_device_node_name(video_dev)); | |
1c1e45d1 HV |
802 | mutex_unlock(&cx->serialize_lock); |
803 | return -ENXIO; | |
804 | } | |
805 | res = cx18_serialized_open(s, filp); | |
806 | mutex_unlock(&cx->serialize_lock); | |
807 | return res; | |
808 | } | |
809 | ||
810 | void cx18_mute(struct cx18 *cx) | |
811 | { | |
d3c5e707 AW |
812 | u32 h; |
813 | if (atomic_read(&cx->ana_capturing)) { | |
814 | h = cx18_find_handle(cx); | |
815 | if (h != CX18_INVALID_TASK_HANDLE) | |
816 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1); | |
817 | else | |
818 | CX18_ERR("Can't find valid task handle for mute\n"); | |
819 | } | |
1c1e45d1 HV |
820 | CX18_DEBUG_INFO("Mute\n"); |
821 | } | |
822 | ||
823 | void cx18_unmute(struct cx18 *cx) | |
824 | { | |
d3c5e707 | 825 | u32 h; |
31554ae5 | 826 | if (atomic_read(&cx->ana_capturing)) { |
d3c5e707 AW |
827 | h = cx18_find_handle(cx); |
828 | if (h != CX18_INVALID_TASK_HANDLE) { | |
829 | cx18_msleep_timeout(100, 0); | |
830 | cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12); | |
831 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0); | |
832 | } else | |
833 | CX18_ERR("Can't find valid task handle for unmute\n"); | |
1c1e45d1 HV |
834 | } |
835 | CX18_DEBUG_INFO("Unmute\n"); | |
836 | } |