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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1c1e45d1 HV |
2 | /* |
3 | * cx18 file operation functions | |
4 | * | |
5 | * Derived from ivtv-fileops.c | |
6 | * | |
7 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
6afdeaf8 | 8 | * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> |
1c1e45d1 HV |
9 | */ |
10 | ||
11 | #include "cx18-driver.h" | |
12 | #include "cx18-fileops.h" | |
13 | #include "cx18-i2c.h" | |
14 | #include "cx18-queue.h" | |
15 | #include "cx18-vbi.h" | |
16 | #include "cx18-audio.h" | |
17 | #include "cx18-mailbox.h" | |
18 | #include "cx18-scb.h" | |
19 | #include "cx18-streams.h" | |
20 | #include "cx18-controls.h" | |
21 | #include "cx18-ioctl.h" | |
22 | #include "cx18-cards.h" | |
eaa80c44 | 23 | #include <media/v4l2-event.h> |
1c1e45d1 HV |
24 | |
25 | /* This function tries to claim the stream for a specific file descriptor. | |
26 | If no one else is using this stream then the stream is claimed and | |
79f3e960 | 27 | associated VBI and IDX streams are also automatically claimed. |
1c1e45d1 HV |
28 | Possible error returns: -EBUSY if someone else has claimed |
29 | the stream or 0 on success. */ | |
8ef22f79 | 30 | int cx18_claim_stream(struct cx18_open_id *id, int type) |
1c1e45d1 HV |
31 | { |
32 | struct cx18 *cx = id->cx; | |
33 | struct cx18_stream *s = &cx->streams[type]; | |
79f3e960 AW |
34 | struct cx18_stream *s_assoc; |
35 | ||
36 | /* Nothing should ever try to directly claim the IDX stream */ | |
37 | if (type == CX18_ENC_STREAM_TYPE_IDX) { | |
6beb1388 | 38 | CX18_WARN("MPEG Index stream cannot be claimed directly, but something tried.\n"); |
79f3e960 AW |
39 | return -EINVAL; |
40 | } | |
1c1e45d1 HV |
41 | |
42 | if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
43 | /* someone already claimed this stream */ | |
44 | if (s->id == id->open_id) { | |
45 | /* yes, this file descriptor did. So that's OK. */ | |
46 | return 0; | |
47 | } | |
48 | if (s->id == -1 && type == CX18_ENC_STREAM_TYPE_VBI) { | |
49 | /* VBI is handled already internally, now also assign | |
50 | the file descriptor to this stream for external | |
51 | reading of the stream. */ | |
52 | s->id = id->open_id; | |
53 | CX18_DEBUG_INFO("Start Read VBI\n"); | |
54 | return 0; | |
55 | } | |
56 | /* someone else is using this stream already */ | |
57 | CX18_DEBUG_INFO("Stream %d is busy\n", type); | |
58 | return -EBUSY; | |
59 | } | |
60 | s->id = id->open_id; | |
61 | ||
79f3e960 AW |
62 | /* |
63 | * CX18_ENC_STREAM_TYPE_MPG needs to claim: | |
64 | * CX18_ENC_STREAM_TYPE_VBI, if VBI insertion is on for sliced VBI, or | |
65 | * CX18_ENC_STREAM_TYPE_IDX, if VBI insertion is off for sliced VBI | |
66 | * (We don't yet fix up MPEG Index entries for our inserted packets). | |
67 | * | |
68 | * For all other streams we're done. | |
69 | */ | |
70 | if (type != CX18_ENC_STREAM_TYPE_MPG) | |
71 | return 0; | |
72 | ||
73 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
74 | if (cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) | |
75 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
76 | else if (!cx18_stream_enabled(s_assoc)) | |
1c1e45d1 | 77 | return 0; |
1c1e45d1 | 78 | |
79f3e960 | 79 | set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); |
1c1e45d1 HV |
80 | |
81 | /* mark that it is used internally */ | |
79f3e960 | 82 | set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags); |
1c1e45d1 HV |
83 | return 0; |
84 | } | |
8ef22f79 | 85 | EXPORT_SYMBOL(cx18_claim_stream); |
1c1e45d1 HV |
86 | |
87 | /* This function releases a previously claimed stream. It will take into | |
88 | account associated VBI streams. */ | |
8ef22f79 | 89 | void cx18_release_stream(struct cx18_stream *s) |
1c1e45d1 HV |
90 | { |
91 | struct cx18 *cx = s->cx; | |
79f3e960 | 92 | struct cx18_stream *s_assoc; |
1c1e45d1 HV |
93 | |
94 | s->id = -1; | |
79f3e960 AW |
95 | if (s->type == CX18_ENC_STREAM_TYPE_IDX) { |
96 | /* | |
97 | * The IDX stream is only used internally, and can | |
98 | * only be indirectly unclaimed by unclaiming the MPG stream. | |
99 | */ | |
100 | return; | |
101 | } | |
102 | ||
1c1e45d1 HV |
103 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && |
104 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) { | |
105 | /* this stream is still in use internally */ | |
106 | return; | |
107 | } | |
108 | if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
109 | CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name); | |
110 | return; | |
111 | } | |
112 | ||
113 | cx18_flush_queues(s); | |
114 | ||
79f3e960 AW |
115 | /* |
116 | * CX18_ENC_STREAM_TYPE_MPG needs to release the | |
117 | * CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams. | |
118 | * | |
119 | * For all other streams we're done. | |
120 | */ | |
121 | if (s->type != CX18_ENC_STREAM_TYPE_MPG) | |
1c1e45d1 HV |
122 | return; |
123 | ||
79f3e960 AW |
124 | /* Unclaim the associated MPEG Index stream */ |
125 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
126 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
127 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
128 | cx18_flush_queues(s_assoc); | |
1c1e45d1 | 129 | } |
79f3e960 AW |
130 | |
131 | /* Unclaim the associated VBI stream */ | |
132 | s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
133 | if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { | |
134 | if (s_assoc->id == -1) { | |
135 | /* | |
136 | * The VBI stream is not still claimed by a file | |
137 | * descriptor, so completely unclaim it. | |
138 | */ | |
139 | clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); | |
140 | cx18_flush_queues(s_assoc); | |
141 | } | |
1c1e45d1 | 142 | } |
1c1e45d1 | 143 | } |
8ef22f79 | 144 | EXPORT_SYMBOL(cx18_release_stream); |
1c1e45d1 HV |
145 | |
146 | static void cx18_dualwatch(struct cx18 *cx) | |
147 | { | |
148 | struct v4l2_tuner vt; | |
0d82fe80 | 149 | u32 new_stereo_mode; |
0d82fe80 | 150 | const u32 dual = 0x0200; |
1c1e45d1 | 151 | |
a75b9be1 | 152 | new_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode); |
1c1e45d1 | 153 | memset(&vt, 0, sizeof(vt)); |
ff2a2001 | 154 | cx18_call_all(cx, tuner, g_tuner, &vt); |
1c1e45d1 HV |
155 | if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && |
156 | (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) | |
157 | new_stereo_mode = dual; | |
158 | ||
159 | if (new_stereo_mode == cx->dualwatch_stereo_mode) | |
160 | return; | |
161 | ||
a75b9be1 HV |
162 | CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n", |
163 | cx->dualwatch_stereo_mode, new_stereo_mode); | |
164 | if (v4l2_ctrl_s_ctrl(cx->cxhdl.audio_mode, new_stereo_mode)) | |
165 | CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); | |
1c1e45d1 HV |
166 | } |
167 | ||
168 | ||
52fcb3ec AW |
169 | static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block, |
170 | int *err) | |
1c1e45d1 HV |
171 | { |
172 | struct cx18 *cx = s->cx; | |
173 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
52fcb3ec | 174 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
175 | DEFINE_WAIT(wait); |
176 | ||
177 | *err = 0; | |
178 | while (1) { | |
179 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
9bff2d61 | 180 | /* Process pending program updates and VBI data */ |
1c1e45d1 HV |
181 | if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { |
182 | cx->dualwatch_jiffies = jiffies; | |
183 | cx18_dualwatch(cx); | |
184 | } | |
185 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
186 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
52fcb3ec AW |
187 | while ((mdl = cx18_dequeue(s_vbi, |
188 | &s_vbi->q_full))) { | |
1c1e45d1 | 189 | /* byteswap and process VBI data */ |
52fcb3ec | 190 | cx18_process_vbi_data(cx, mdl, |
af009cf6 | 191 | s_vbi->type); |
52fcb3ec | 192 | cx18_stream_put_mdl_fw(s_vbi, mdl); |
1c1e45d1 HV |
193 | } |
194 | } | |
52fcb3ec AW |
195 | mdl = &cx->vbi.sliced_mpeg_mdl; |
196 | if (mdl->readpos != mdl->bytesused) | |
197 | return mdl; | |
1c1e45d1 HV |
198 | } |
199 | ||
1c1e45d1 | 200 | /* do we have new data? */ |
52fcb3ec AW |
201 | mdl = cx18_dequeue(s, &s->q_full); |
202 | if (mdl) { | |
203 | if (!test_and_clear_bit(CX18_F_M_NEED_SWAP, | |
204 | &mdl->m_flags)) | |
205 | return mdl; | |
1c1e45d1 HV |
206 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) |
207 | /* byteswap MPG data */ | |
52fcb3ec | 208 | cx18_mdl_swap(mdl); |
1c1e45d1 HV |
209 | else { |
210 | /* byteswap and process VBI data */ | |
52fcb3ec | 211 | cx18_process_vbi_data(cx, mdl, s->type); |
1c1e45d1 | 212 | } |
52fcb3ec | 213 | return mdl; |
1c1e45d1 HV |
214 | } |
215 | ||
216 | /* return if end of stream */ | |
217 | if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
218 | CX18_DEBUG_INFO("EOS %s\n", s->name); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | /* return if file was opened with O_NONBLOCK */ | |
223 | if (non_block) { | |
224 | *err = -EAGAIN; | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | /* wait for more data to arrive */ | |
229 | prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); | |
230 | /* New buffers might have become available before we were added | |
231 | to the waitqueue */ | |
c37b11bf | 232 | if (!atomic_read(&s->q_full.depth)) |
1c1e45d1 HV |
233 | schedule(); |
234 | finish_wait(&s->waitq, &wait); | |
235 | if (signal_pending(current)) { | |
236 | /* return if a signal was received */ | |
237 | CX18_DEBUG_INFO("User stopped %s\n", s->name); | |
238 | *err = -EINTR; | |
239 | return NULL; | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
52fcb3ec | 244 | static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx) |
1c1e45d1 | 245 | { |
52fcb3ec AW |
246 | struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl; |
247 | struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf; | |
1c1e45d1 HV |
248 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
249 | ||
52fcb3ec AW |
250 | buf->buf = cx->vbi.sliced_mpeg_data[idx]; |
251 | buf->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
252 | buf->readpos = 0; | |
253 | ||
254 | mdl->curr_buf = NULL; | |
255 | mdl->bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
256 | mdl->readpos = 0; | |
1c1e45d1 HV |
257 | } |
258 | ||
259 | static size_t cx18_copy_buf_to_user(struct cx18_stream *s, | |
52fcb3ec | 260 | struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop) |
1c1e45d1 HV |
261 | { |
262 | struct cx18 *cx = s->cx; | |
263 | size_t len = buf->bytesused - buf->readpos; | |
264 | ||
52fcb3ec | 265 | *stop = false; |
1c1e45d1 HV |
266 | if (len > ucount) |
267 | len = ucount; | |
268 | if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && | |
dd073434 | 269 | !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { |
302df970 AW |
270 | /* |
271 | * Try to find a good splice point in the PS, just before | |
272 | * an MPEG-2 Program Pack start code, and provide only | |
273 | * up to that point to the user, so it's easy to insert VBI data | |
274 | * the next time around. | |
0c629252 AW |
275 | * |
276 | * This will not work for an MPEG-2 TS and has only been | |
277 | * verified by analysis to work for an MPEG-2 PS. Helen Buus | |
278 | * pointed out this works for the CX23416 MPEG-2 DVD compatible | |
279 | * stream, and research indicates both the MPEG 2 SVCD and DVD | |
280 | * stream types use an MPEG-2 PS container. | |
302df970 | 281 | */ |
302df970 AW |
282 | /* |
283 | * An MPEG-2 Program Stream (PS) is a series of | |
284 | * MPEG-2 Program Packs terminated by an | |
285 | * MPEG Program End Code after the last Program Pack. | |
286 | * A Program Pack may hold a PS System Header packet and any | |
287 | * number of Program Elementary Stream (PES) Packets | |
288 | */ | |
1c1e45d1 HV |
289 | const char *start = buf->buf + buf->readpos; |
290 | const char *p = start + 1; | |
291 | const u8 *q; | |
292 | u8 ch = cx->search_pack_header ? 0xba : 0xe0; | |
293 | int stuffing, i; | |
294 | ||
295 | while (start + len > p) { | |
302df970 | 296 | /* Scan for a 0 to find a potential MPEG-2 start code */ |
1c1e45d1 HV |
297 | q = memchr(p, 0, start + len - p); |
298 | if (q == NULL) | |
299 | break; | |
300 | p = q + 1; | |
302df970 AW |
301 | /* |
302 | * Keep looking if not a | |
303 | * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba | |
304 | * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 | |
305 | */ | |
1c1e45d1 HV |
306 | if ((char *)q + 15 >= buf->buf + buf->bytesused || |
307 | q[1] != 0 || q[2] != 1 || q[3] != ch) | |
308 | continue; | |
302df970 AW |
309 | |
310 | /* If expecting the primary video PES */ | |
1c1e45d1 | 311 | if (!cx->search_pack_header) { |
302df970 | 312 | /* Continue if it couldn't be a PES packet */ |
1c1e45d1 HV |
313 | if ((q[6] & 0xc0) != 0x80) |
314 | continue; | |
302df970 AW |
315 | /* Check if a PTS or PTS & DTS follow */ |
316 | if (((q[7] & 0xc0) == 0x80 && /* PTS only */ | |
317 | (q[9] & 0xf0) == 0x20) || /* PTS only */ | |
318 | ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ | |
319 | (q[9] & 0xf0) == 0x30)) { /* DTS follows */ | |
320 | /* Assume we found the video PES hdr */ | |
321 | ch = 0xba; /* next want a Program Pack*/ | |
1c1e45d1 | 322 | cx->search_pack_header = 1; |
302df970 | 323 | p = q + 9; /* Skip this video PES hdr */ |
1c1e45d1 HV |
324 | } |
325 | continue; | |
326 | } | |
302df970 AW |
327 | |
328 | /* We may have found a Program Pack start code */ | |
329 | ||
330 | /* Get the count of stuffing bytes & verify them */ | |
1c1e45d1 HV |
331 | stuffing = q[13] & 7; |
332 | /* all stuffing bytes must be 0xff */ | |
333 | for (i = 0; i < stuffing; i++) | |
334 | if (q[14 + i] != 0xff) | |
335 | break; | |
302df970 AW |
336 | if (i == stuffing && /* right number of stuffing bytes*/ |
337 | (q[4] & 0xc4) == 0x44 && /* marker check */ | |
338 | (q[12] & 3) == 3 && /* marker check */ | |
339 | q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ | |
1c1e45d1 HV |
340 | q[15 + stuffing] == 0 && |
341 | q[16 + stuffing] == 1) { | |
302df970 AW |
342 | /* We declare we actually found a Program Pack*/ |
343 | cx->search_pack_header = 0; /* expect vid PES */ | |
1c1e45d1 | 344 | len = (char *)q - start; |
52fcb3ec AW |
345 | cx18_setup_sliced_vbi_mdl(cx); |
346 | *stop = true; | |
1c1e45d1 HV |
347 | break; |
348 | } | |
349 | } | |
350 | } | |
351 | if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { | |
352 | CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n", | |
353 | len, s->name); | |
354 | return -EFAULT; | |
355 | } | |
356 | buf->readpos += len; | |
357 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
358 | buf != &cx->vbi.sliced_mpeg_buf) | |
359 | cx->mpg_data_received += len; | |
360 | return len; | |
361 | } | |
362 | ||
52fcb3ec AW |
363 | static size_t cx18_copy_mdl_to_user(struct cx18_stream *s, |
364 | struct cx18_mdl *mdl, char __user *ubuf, size_t ucount) | |
365 | { | |
366 | size_t tot_written = 0; | |
367 | int rc; | |
368 | bool stop = false; | |
369 | ||
370 | if (mdl->curr_buf == NULL) | |
371 | mdl->curr_buf = list_first_entry(&mdl->buf_list, | |
372 | struct cx18_buffer, list); | |
373 | ||
374 | if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) { | |
375 | /* | |
376 | * For some reason we've exhausted the buffers, but the MDL | |
377 | * object still said some data was unread. | |
378 | * Fix that and bail out. | |
379 | */ | |
380 | mdl->readpos = mdl->bytesused; | |
381 | return 0; | |
382 | } | |
383 | ||
384 | list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) { | |
385 | ||
386 | if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused) | |
387 | continue; | |
388 | ||
389 | rc = cx18_copy_buf_to_user(s, mdl->curr_buf, ubuf + tot_written, | |
390 | ucount - tot_written, &stop); | |
391 | if (rc < 0) | |
392 | return rc; | |
393 | mdl->readpos += rc; | |
394 | tot_written += rc; | |
395 | ||
396 | if (stop || /* Forced stopping point for VBI insertion */ | |
16790554 | 397 | tot_written >= ucount || /* Reader request satisfied */ |
52fcb3ec AW |
398 | mdl->curr_buf->readpos < mdl->curr_buf->bytesused || |
399 | mdl->readpos >= mdl->bytesused) /* MDL buffers drained */ | |
400 | break; | |
401 | } | |
402 | return tot_written; | |
403 | } | |
404 | ||
1c1e45d1 HV |
405 | static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, |
406 | size_t tot_count, int non_block) | |
407 | { | |
408 | struct cx18 *cx = s->cx; | |
409 | size_t tot_written = 0; | |
410 | int single_frame = 0; | |
411 | ||
31554ae5 | 412 | if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) { |
1c1e45d1 HV |
413 | /* shouldn't happen */ |
414 | CX18_DEBUG_WARN("Stream %s not initialized before read\n", | |
415 | s->name); | |
416 | return -EIO; | |
417 | } | |
418 | ||
419 | /* Each VBI buffer is one frame, the v4l2 API says that for VBI the | |
420 | frames should arrive one-by-one, so make sure we never output more | |
421 | than one VBI frame at a time */ | |
dd073434 | 422 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx)) |
1c1e45d1 HV |
423 | single_frame = 1; |
424 | ||
425 | for (;;) { | |
52fcb3ec | 426 | struct cx18_mdl *mdl; |
1c1e45d1 HV |
427 | int rc; |
428 | ||
52fcb3ec | 429 | mdl = cx18_get_mdl(s, non_block, &rc); |
1c1e45d1 | 430 | /* if there is no data available... */ |
52fcb3ec | 431 | if (mdl == NULL) { |
1c1e45d1 HV |
432 | /* if we got data, then return that regardless */ |
433 | if (tot_written) | |
434 | break; | |
435 | /* EOS condition */ | |
436 | if (rc == 0) { | |
437 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
438 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
439 | cx18_release_stream(s); | |
440 | } | |
441 | /* set errno */ | |
442 | return rc; | |
443 | } | |
444 | ||
52fcb3ec | 445 | rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written, |
1c1e45d1 HV |
446 | tot_count - tot_written); |
447 | ||
52fcb3ec AW |
448 | if (mdl != &cx->vbi.sliced_mpeg_mdl) { |
449 | if (mdl->readpos == mdl->bytesused) | |
450 | cx18_stream_put_mdl_fw(s, mdl); | |
66c2a6b0 | 451 | else |
52fcb3ec AW |
452 | cx18_push(s, mdl, &s->q_full); |
453 | } else if (mdl->readpos == mdl->bytesused) { | |
1c1e45d1 HV |
454 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; |
455 | ||
456 | cx->vbi.sliced_mpeg_size[idx] = 0; | |
457 | cx->vbi.inserted_frame++; | |
52fcb3ec | 458 | cx->vbi_data_inserted += mdl->bytesused; |
1c1e45d1 HV |
459 | } |
460 | if (rc < 0) | |
461 | return rc; | |
462 | tot_written += rc; | |
463 | ||
464 | if (tot_written == tot_count || single_frame) | |
465 | break; | |
466 | } | |
467 | return tot_written; | |
468 | } | |
469 | ||
470 | static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf, | |
471 | size_t count, loff_t *pos, int non_block) | |
472 | { | |
473 | ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0; | |
474 | struct cx18 *cx = s->cx; | |
475 | ||
476 | CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); | |
477 | if (rc > 0) | |
7afb0df5 | 478 | *pos += rc; |
1c1e45d1 HV |
479 | return rc; |
480 | } | |
481 | ||
482 | int cx18_start_capture(struct cx18_open_id *id) | |
483 | { | |
484 | struct cx18 *cx = id->cx; | |
485 | struct cx18_stream *s = &cx->streams[id->type]; | |
486 | struct cx18_stream *s_vbi; | |
79f3e960 | 487 | struct cx18_stream *s_idx; |
1c1e45d1 HV |
488 | |
489 | if (s->type == CX18_ENC_STREAM_TYPE_RAD) { | |
490 | /* you cannot read from these stream types. */ | |
491 | return -EPERM; | |
492 | } | |
493 | ||
494 | /* Try to claim this stream. */ | |
495 | if (cx18_claim_stream(id, s->type)) | |
496 | return -EBUSY; | |
497 | ||
498 | /* If capture is already in progress, then we also have to | |
499 | do nothing extra. */ | |
500 | if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || | |
501 | test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
502 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
503 | return 0; | |
504 | } | |
505 | ||
79f3e960 | 506 | /* Start associated VBI or IDX stream capture if required */ |
1c1e45d1 | 507 | s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
79f3e960 AW |
508 | s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; |
509 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
510 | /* | |
511 | * The VBI and IDX streams should have been claimed | |
512 | * automatically, if for internal use, when the MPG stream was | |
513 | * claimed. We only need to start these streams capturing. | |
514 | */ | |
515 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_idx->s_flags) && | |
516 | !test_and_set_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
517 | if (cx18_start_v4l2_encode_stream(s_idx)) { | |
518 | CX18_DEBUG_WARN("IDX capture start failed\n"); | |
519 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
520 | goto start_failed; | |
521 | } | |
522 | CX18_DEBUG_INFO("IDX capture started\n"); | |
523 | } | |
524 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
525 | !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { | |
526 | if (cx18_start_v4l2_encode_stream(s_vbi)) { | |
527 | CX18_DEBUG_WARN("VBI capture start failed\n"); | |
528 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
529 | goto start_failed; | |
530 | } | |
531 | CX18_DEBUG_INFO("VBI insertion started\n"); | |
1c1e45d1 | 532 | } |
1c1e45d1 HV |
533 | } |
534 | ||
535 | /* Tell the card to start capturing */ | |
536 | if (!cx18_start_v4l2_encode_stream(s)) { | |
537 | /* We're done */ | |
538 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
539 | /* Resume a possibly paused encoder */ | |
540 | if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags)) | |
541 | cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle); | |
542 | return 0; | |
543 | } | |
544 | ||
79f3e960 | 545 | start_failed: |
1c1e45d1 HV |
546 | CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); |
547 | ||
79f3e960 AW |
548 | /* |
549 | * The associated VBI and IDX streams for internal use are released | |
550 | * automatically when the MPG stream is released. We only need to stop | |
551 | * the associated stream. | |
552 | */ | |
553 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
554 | /* Stop the IDX stream which is always for internal use */ | |
555 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
556 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
557 | clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); | |
558 | } | |
559 | /* Stop the VBI stream, if only running for internal use */ | |
560 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
561 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
562 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
563 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
564 | } | |
1c1e45d1 HV |
565 | } |
566 | clear_bit(CX18_F_S_STREAMING, &s->s_flags); | |
79f3e960 | 567 | cx18_release_stream(s); /* Also releases associated streams */ |
1c1e45d1 HV |
568 | return -EIO; |
569 | } | |
570 | ||
571 | ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, | |
572 | loff_t *pos) | |
573 | { | |
0b5f265a | 574 | struct cx18_open_id *id = file2id(filp); |
1c1e45d1 HV |
575 | struct cx18 *cx = id->cx; |
576 | struct cx18_stream *s = &cx->streams[id->type]; | |
577 | int rc; | |
578 | ||
579 | CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); | |
580 | ||
581 | mutex_lock(&cx->serialize_lock); | |
582 | rc = cx18_start_capture(id); | |
583 | mutex_unlock(&cx->serialize_lock); | |
584 | if (rc) | |
585 | return rc; | |
b7101de3 | 586 | |
1bf5842f | 587 | if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
b7101de3 | 588 | (id->type == CX18_ENC_STREAM_TYPE_YUV)) { |
1bf5842f | 589 | return videobuf_read_stream(&s->vbuf_q, buf, count, pos, 0, |
b7101de3 ST |
590 | filp->f_flags & O_NONBLOCK); |
591 | } | |
592 | ||
1c1e45d1 HV |
593 | return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); |
594 | } | |
595 | ||
c23e0cb8 | 596 | __poll_t cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) |
1c1e45d1 | 597 | { |
01699437 | 598 | __poll_t req_events = poll_requested_events(wait); |
0b5f265a | 599 | struct cx18_open_id *id = file2id(filp); |
1c1e45d1 HV |
600 | struct cx18 *cx = id->cx; |
601 | struct cx18_stream *s = &cx->streams[id->type]; | |
602 | int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
c23e0cb8 | 603 | __poll_t res = 0; |
1c1e45d1 HV |
604 | |
605 | /* Start a capture if there is none */ | |
eaa80c44 | 606 | if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags) && |
a9a08845 | 607 | (req_events & (EPOLLIN | EPOLLRDNORM))) { |
1c1e45d1 HV |
608 | int rc; |
609 | ||
610 | mutex_lock(&cx->serialize_lock); | |
611 | rc = cx18_start_capture(id); | |
612 | mutex_unlock(&cx->serialize_lock); | |
613 | if (rc) { | |
614 | CX18_DEBUG_INFO("Could not start capture for %s (%d)\n", | |
615 | s->name, rc); | |
a9a08845 | 616 | return EPOLLERR; |
1c1e45d1 HV |
617 | } |
618 | CX18_DEBUG_FILE("Encoder poll started capture\n"); | |
619 | } | |
620 | ||
1bf5842f | 621 | if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
b7101de3 | 622 | (id->type == CX18_ENC_STREAM_TYPE_YUV)) { |
c23e0cb8 | 623 | __poll_t videobuf_poll = videobuf_poll_stream(filp, &s->vbuf_q, wait); |
eaa80c44 HV |
624 | |
625 | if (v4l2_event_pending(&id->fh)) | |
a9a08845 LT |
626 | res |= EPOLLPRI; |
627 | if (eof && videobuf_poll == EPOLLERR) | |
628 | return res | EPOLLHUP; | |
eaa80c44 | 629 | return res | videobuf_poll; |
b7101de3 ST |
630 | } |
631 | ||
1c1e45d1 HV |
632 | /* add stream's waitq to the poll list */ |
633 | CX18_DEBUG_HI_FILE("Encoder poll\n"); | |
eaa80c44 | 634 | if (v4l2_event_pending(&id->fh)) |
a9a08845 | 635 | res |= EPOLLPRI; |
eaa80c44 HV |
636 | else |
637 | poll_wait(filp, &s->waitq, wait); | |
1c1e45d1 | 638 | |
c37b11bf | 639 | if (atomic_read(&s->q_full.depth)) |
a9a08845 | 640 | return res | EPOLLIN | EPOLLRDNORM; |
1c1e45d1 | 641 | if (eof) |
a9a08845 | 642 | return res | EPOLLHUP; |
eaa80c44 | 643 | return res; |
1c1e45d1 HV |
644 | } |
645 | ||
b7101de3 ST |
646 | int cx18_v4l2_mmap(struct file *file, struct vm_area_struct *vma) |
647 | { | |
648 | struct cx18_open_id *id = file->private_data; | |
649 | struct cx18 *cx = id->cx; | |
650 | struct cx18_stream *s = &cx->streams[id->type]; | |
651 | int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
652 | ||
1bf5842f | 653 | if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
b7101de3 ST |
654 | (id->type == CX18_ENC_STREAM_TYPE_YUV)) { |
655 | ||
656 | /* Start a capture if there is none */ | |
657 | if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
658 | int rc; | |
659 | ||
660 | mutex_lock(&cx->serialize_lock); | |
661 | rc = cx18_start_capture(id); | |
662 | mutex_unlock(&cx->serialize_lock); | |
663 | if (rc) { | |
664 | CX18_DEBUG_INFO( | |
665 | "Could not start capture for %s (%d)\n", | |
666 | s->name, rc); | |
667 | return -EINVAL; | |
668 | } | |
1bf5842f | 669 | CX18_DEBUG_FILE("Encoder mmap started capture\n"); |
b7101de3 ST |
670 | } |
671 | ||
1bf5842f | 672 | return videobuf_mmap_mapper(&s->vbuf_q, vma); |
b7101de3 ST |
673 | } |
674 | ||
675 | return -EINVAL; | |
676 | } | |
677 | ||
162e6376 | 678 | void cx18_vb_timeout(struct timer_list *t) |
b7101de3 | 679 | { |
162e6376 | 680 | struct cx18_stream *s = from_timer(s, t, vb_timeout); |
b7101de3 ST |
681 | struct cx18_videobuf_buffer *buf; |
682 | unsigned long flags; | |
683 | ||
684 | /* Return all of the buffers in error state, so the vbi/vid inode | |
685 | * can return from blocking. | |
686 | */ | |
687 | spin_lock_irqsave(&s->vb_lock, flags); | |
688 | while (!list_empty(&s->vb_capture)) { | |
689 | buf = list_entry(s->vb_capture.next, | |
690 | struct cx18_videobuf_buffer, vb.queue); | |
691 | list_del(&buf->vb.queue); | |
692 | buf->vb.state = VIDEOBUF_ERROR; | |
693 | wake_up(&buf->vb.done); | |
694 | } | |
695 | spin_unlock_irqrestore(&s->vb_lock, flags); | |
696 | } | |
697 | ||
1c1e45d1 HV |
698 | void cx18_stop_capture(struct cx18_open_id *id, int gop_end) |
699 | { | |
700 | struct cx18 *cx = id->cx; | |
701 | struct cx18_stream *s = &cx->streams[id->type]; | |
79f3e960 AW |
702 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; |
703 | struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; | |
1c1e45d1 HV |
704 | |
705 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
706 | ||
707 | /* 'Unclaim' this stream */ | |
708 | ||
709 | /* Stop capturing */ | |
710 | if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
1c1e45d1 | 711 | CX18_DEBUG_INFO("close stopping capture\n"); |
79f3e960 AW |
712 | if (id->type == CX18_ENC_STREAM_TYPE_MPG) { |
713 | /* Stop internal use associated VBI and IDX streams */ | |
714 | if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
715 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
6beb1388 | 716 | CX18_DEBUG_INFO("close stopping embedded VBI capture\n"); |
79f3e960 AW |
717 | cx18_stop_v4l2_encode_stream(s_vbi, 0); |
718 | } | |
719 | if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { | |
720 | CX18_DEBUG_INFO("close stopping IDX capture\n"); | |
721 | cx18_stop_v4l2_encode_stream(s_idx, 0); | |
722 | } | |
1c1e45d1 HV |
723 | } |
724 | if (id->type == CX18_ENC_STREAM_TYPE_VBI && | |
725 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) | |
726 | /* Also used internally, don't stop capturing */ | |
727 | s->id = -1; | |
728 | else | |
729 | cx18_stop_v4l2_encode_stream(s, gop_end); | |
730 | } | |
731 | if (!gop_end) { | |
732 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
733 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
734 | cx18_release_stream(s); | |
735 | } | |
736 | } | |
737 | ||
bec43661 | 738 | int cx18_v4l2_close(struct file *filp) |
1c1e45d1 | 739 | { |
0b5f265a HV |
740 | struct v4l2_fh *fh = filp->private_data; |
741 | struct cx18_open_id *id = fh2id(fh); | |
1c1e45d1 HV |
742 | struct cx18 *cx = id->cx; |
743 | struct cx18_stream *s = &cx->streams[id->type]; | |
744 | ||
745 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
746 | ||
1c1e45d1 | 747 | mutex_lock(&cx->serialize_lock); |
4d68e700 HV |
748 | /* Stop radio */ |
749 | if (id->type == CX18_ENC_STREAM_TYPE_RAD && | |
750 | v4l2_fh_is_singular_file(filp)) { | |
1c1e45d1 HV |
751 | /* Closing radio device, return to TV mode */ |
752 | cx18_mute(cx); | |
753 | /* Mark that the radio is no longer in use */ | |
754 | clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
755 | /* Switch tuner to TV */ | |
8774bed9 | 756 | cx18_call_all(cx, video, s_std, cx->std); |
1c1e45d1 HV |
757 | /* Select correct audio input (i.e. TV tuner or Line in) */ |
758 | cx18_audio_set_io(cx); | |
31554ae5 | 759 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
760 | /* Undo video mute */ |
761 | cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, | |
a75b9be1 HV |
762 | (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute) | |
763 | (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8))); | |
1c1e45d1 HV |
764 | } |
765 | /* Done! Unmute and continue. */ | |
766 | cx18_unmute(cx); | |
1c1e45d1 | 767 | } |
4d68e700 HV |
768 | |
769 | v4l2_fh_del(fh); | |
770 | v4l2_fh_exit(fh); | |
771 | ||
772 | /* 'Unclaim' this stream */ | |
773 | if (s->id == id->open_id) | |
774 | cx18_stop_capture(id, 0); | |
1c1e45d1 HV |
775 | kfree(id); |
776 | mutex_unlock(&cx->serialize_lock); | |
777 | return 0; | |
778 | } | |
779 | ||
780 | static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) | |
781 | { | |
782 | struct cx18 *cx = s->cx; | |
783 | struct cx18_open_id *item; | |
784 | ||
785 | CX18_DEBUG_FILE("open %s\n", s->name); | |
786 | ||
787 | /* Allocate memory */ | |
0b5f265a | 788 | item = kzalloc(sizeof(struct cx18_open_id), GFP_KERNEL); |
1c1e45d1 HV |
789 | if (NULL == item) { |
790 | CX18_DEBUG_WARN("nomem on v4l2 open\n"); | |
791 | return -ENOMEM; | |
792 | } | |
08569d64 | 793 | v4l2_fh_init(&item->fh, &s->video_dev); |
0b5f265a | 794 | |
1c1e45d1 HV |
795 | item->cx = cx; |
796 | item->type = s->type; | |
1c1e45d1 HV |
797 | |
798 | item->open_id = cx->open_id++; | |
0b5f265a | 799 | filp->private_data = &item->fh; |
4d68e700 | 800 | v4l2_fh_add(&item->fh); |
1c1e45d1 | 801 | |
4d68e700 HV |
802 | if (item->type == CX18_ENC_STREAM_TYPE_RAD && |
803 | v4l2_fh_is_singular_file(filp)) { | |
1c1e45d1 | 804 | if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { |
31554ae5 | 805 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
806 | /* switching to radio while capture is |
807 | in progress is not polite */ | |
4d68e700 | 808 | v4l2_fh_del(&item->fh); |
0b5f265a | 809 | v4l2_fh_exit(&item->fh); |
1c1e45d1 HV |
810 | kfree(item); |
811 | return -EBUSY; | |
812 | } | |
813 | } | |
814 | ||
815 | /* Mark that the radio is being used. */ | |
816 | set_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
817 | /* We have the radio */ | |
818 | cx18_mute(cx); | |
819 | /* Switch tuner to radio */ | |
ff2a2001 | 820 | cx18_call_all(cx, tuner, s_radio); |
1c1e45d1 HV |
821 | /* Select the correct audio input (i.e. radio tuner) */ |
822 | cx18_audio_set_io(cx); | |
823 | /* Done! Unmute and continue. */ | |
824 | cx18_unmute(cx); | |
825 | } | |
826 | return 0; | |
827 | } | |
828 | ||
bec43661 | 829 | int cx18_v4l2_open(struct file *filp) |
1c1e45d1 | 830 | { |
5811cf99 AW |
831 | int res; |
832 | struct video_device *video_dev = video_devdata(filp); | |
833 | struct cx18_stream *s = video_get_drvdata(video_dev); | |
32a60955 | 834 | struct cx18 *cx = s->cx; |
1c1e45d1 HV |
835 | |
836 | mutex_lock(&cx->serialize_lock); | |
837 | if (cx18_init_on_first_open(cx)) { | |
50462eb0 LP |
838 | CX18_ERR("Failed to initialize on %s\n", |
839 | video_device_node_name(video_dev)); | |
1c1e45d1 HV |
840 | mutex_unlock(&cx->serialize_lock); |
841 | return -ENXIO; | |
842 | } | |
843 | res = cx18_serialized_open(s, filp); | |
844 | mutex_unlock(&cx->serialize_lock); | |
845 | return res; | |
846 | } | |
847 | ||
848 | void cx18_mute(struct cx18 *cx) | |
849 | { | |
d3c5e707 AW |
850 | u32 h; |
851 | if (atomic_read(&cx->ana_capturing)) { | |
852 | h = cx18_find_handle(cx); | |
853 | if (h != CX18_INVALID_TASK_HANDLE) | |
854 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1); | |
855 | else | |
856 | CX18_ERR("Can't find valid task handle for mute\n"); | |
857 | } | |
1c1e45d1 HV |
858 | CX18_DEBUG_INFO("Mute\n"); |
859 | } | |
860 | ||
861 | void cx18_unmute(struct cx18 *cx) | |
862 | { | |
d3c5e707 | 863 | u32 h; |
31554ae5 | 864 | if (atomic_read(&cx->ana_capturing)) { |
d3c5e707 AW |
865 | h = cx18_find_handle(cx); |
866 | if (h != CX18_INVALID_TASK_HANDLE) { | |
867 | cx18_msleep_timeout(100, 0); | |
868 | cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12); | |
869 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0); | |
870 | } else | |
871 | CX18_ERR("Can't find valid task handle for unmute\n"); | |
1c1e45d1 HV |
872 | } |
873 | CX18_DEBUG_INFO("Unmute\n"); | |
874 | } |