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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * cx18 file operation functions4 *5 * Derived from ivtv-fileops.c6 *7 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>8 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>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"23#include <media/v4l2-event.h>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 and27 associated VBI and IDX streams are also automatically claimed.28 Possible error returns: -EBUSY if someone else has claimed29 the stream or 0 on success. */30int cx18_claim_stream(struct cx18_open_id *id, int type)31{32 struct cx18 *cx = id->cx;33 struct cx18_stream *s = &cx->streams[type];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) {38 CX18_WARN("MPEG Index stream cannot be claimed directly, but something tried.\n");39 return -EINVAL;40 }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 assign50 the file descriptor to this stream for external51 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 62 /*63 * CX18_ENC_STREAM_TYPE_MPG needs to claim:64 * CX18_ENC_STREAM_TYPE_VBI, if VBI insertion is on for sliced VBI, or65 * CX18_ENC_STREAM_TYPE_IDX, if VBI insertion is off for sliced VBI66 * (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))77 return 0;78 79 set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);80 81 /* mark that it is used internally */82 set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags);83 return 0;84}85EXPORT_SYMBOL(cx18_claim_stream);86 87/* This function releases a previously claimed stream. It will take into88 account associated VBI streams. */89void cx18_release_stream(struct cx18_stream *s)90{91 struct cx18 *cx = s->cx;92 struct cx18_stream *s_assoc;93 94 s->id = -1;95 if (s->type == CX18_ENC_STREAM_TYPE_IDX) {96 /*97 * The IDX stream is only used internally, and can98 * only be indirectly unclaimed by unclaiming the MPG stream.99 */100 return;101 }102 103 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);114 115 /*116 * CX18_ENC_STREAM_TYPE_MPG needs to release the117 * 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)122 return;123 124 /* 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);129 }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 file137 * descriptor, so completely unclaim it.138 */139 clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);140 cx18_flush_queues(s_assoc);141 }142 }143}144EXPORT_SYMBOL(cx18_release_stream);145 146static void cx18_dualwatch(struct cx18 *cx)147{148 struct v4l2_tuner vt;149 u32 new_stereo_mode;150 const u32 dual = 0x0200;151 152 new_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);153 memset(&vt, 0, sizeof(vt));154 cx18_call_all(cx, tuner, g_tuner, &vt);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;161 162 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");166}167 168 169static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block,170 int *err)171{172 struct cx18 *cx = s->cx;173 struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];174 struct cx18_mdl *mdl;175 DEFINE_WAIT(wait);176 177 *err = 0;178 while (1) {179 if (s->type == CX18_ENC_STREAM_TYPE_MPG) {180 /* Process pending program updates and VBI data */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)) {187 while ((mdl = cx18_dequeue(s_vbi,188 &s_vbi->q_full))) {189 /* byteswap and process VBI data */190 cx18_process_vbi_data(cx, mdl,191 s_vbi->type);192 cx18_stream_put_mdl_fw(s_vbi, mdl);193 }194 }195 mdl = &cx->vbi.sliced_mpeg_mdl;196 if (mdl->readpos != mdl->bytesused)197 return mdl;198 }199 200 /* do we have new data? */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;206 if (s->type == CX18_ENC_STREAM_TYPE_MPG)207 /* byteswap MPG data */208 cx18_mdl_swap(mdl);209 else {210 /* byteswap and process VBI data */211 cx18_process_vbi_data(cx, mdl, s->type);212 }213 return mdl;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 added231 to the waitqueue */232 if (!atomic_read(&s->q_full.depth))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 244static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx)245{246 struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl;247 struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf;248 int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES;249 250 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;257}258 259static size_t cx18_copy_buf_to_user(struct cx18_stream *s,260 struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop)261{262 struct cx18 *cx = s->cx;263 size_t len = buf->bytesused - buf->readpos;264 265 *stop = false;266 if (len > ucount)267 len = ucount;268 if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG &&269 !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) {270 /*271 * Try to find a good splice point in the PS, just before272 * an MPEG-2 Program Pack start code, and provide only273 * up to that point to the user, so it's easy to insert VBI data274 * the next time around.275 *276 * This will not work for an MPEG-2 TS and has only been277 * verified by analysis to work for an MPEG-2 PS. Helen Buus278 * pointed out this works for the CX23416 MPEG-2 DVD compatible279 * stream, and research indicates both the MPEG 2 SVCD and DVD280 * stream types use an MPEG-2 PS container.281 */282 /*283 * An MPEG-2 Program Stream (PS) is a series of284 * MPEG-2 Program Packs terminated by an285 * MPEG Program End Code after the last Program Pack.286 * A Program Pack may hold a PS System Header packet and any287 * number of Program Elementary Stream (PES) Packets288 */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) {296 /* Scan for a 0 to find a potential MPEG-2 start code */297 q = memchr(p, 0, start + len - p);298 if (q == NULL)299 break;300 p = q + 1;301 /*302 * Keep looking if not a303 * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba304 * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0305 */306 if ((char *)q + 15 >= buf->buf + buf->bytesused ||307 q[1] != 0 || q[2] != 1 || q[3] != ch)308 continue;309 310 /* If expecting the primary video PES */311 if (!cx->search_pack_header) {312 /* Continue if it couldn't be a PES packet */313 if ((q[6] & 0xc0) != 0x80)314 continue;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*/322 cx->search_pack_header = 1;323 p = q + 9; /* Skip this video PES hdr */324 }325 continue;326 }327 328 /* We may have found a Program Pack start code */329 330 /* Get the count of stuffing bytes & verify them */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;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 */340 q[15 + stuffing] == 0 &&341 q[16 + stuffing] == 1) {342 /* We declare we actually found a Program Pack*/343 cx->search_pack_header = 0; /* expect vid PES */344 len = (char *)q - start;345 cx18_setup_sliced_vbi_mdl(cx);346 *stop = true;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 363static 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 MDL377 * 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 */397 tot_written >= ucount || /* Reader request satisfied */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 405static 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;411 412 if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) {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 the420 frames should arrive one-by-one, so make sure we never output more421 than one VBI frame at a time */422 if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx))423 single_frame = 1;424 425 for (;;) {426 struct cx18_mdl *mdl;427 int rc;428 429 mdl = cx18_get_mdl(s, non_block, &rc);430 /* if there is no data available... */431 if (mdl == NULL) {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 }444 445 rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written,446 tot_count - tot_written);447 448 if (mdl != &cx->vbi.sliced_mpeg_mdl) {449 if (mdl->readpos == mdl->bytesused)450 cx18_stream_put_mdl_fw(s, mdl);451 else452 cx18_push(s, mdl, &s->q_full);453 } else if (mdl->readpos == mdl->bytesused) {454 int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES;455 456 cx->vbi.sliced_mpeg_size[idx] = 0;457 cx->vbi.inserted_frame++;458 cx->vbi_data_inserted += mdl->bytesused;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 470static 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)478 *pos += rc;479 return rc;480}481 482int 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;487 struct cx18_stream *s_idx;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 to499 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 }505 506 /* Start associated VBI or IDX stream capture if required */507 s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];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 claimed512 * automatically, if for internal use, when the MPG stream was513 * 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");532 }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 545start_failed:546 CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);547 548 /*549 * The associated VBI and IDX streams for internal use are released550 * automatically when the MPG stream is released. We only need to stop551 * 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 }565 }566 clear_bit(CX18_F_S_STREAMING, &s->s_flags);567 cx18_release_stream(s); /* Also releases associated streams */568 return -EIO;569}570 571ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count,572 loff_t *pos)573{574 struct cx18_open_id *id = file2id(filp);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;586 587 return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);588}589 590__poll_t cx18_v4l2_enc_poll(struct file *filp, poll_table *wait)591{592 __poll_t req_events = poll_requested_events(wait);593 struct cx18_open_id *id = file2id(filp);594 struct cx18 *cx = id->cx;595 struct cx18_stream *s = &cx->streams[id->type];596 int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags);597 __poll_t res = 0;598 599 /* Start a capture if there is none */600 if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags) &&601 (req_events & (EPOLLIN | EPOLLRDNORM))) {602 int rc;603 604 mutex_lock(&cx->serialize_lock);605 rc = cx18_start_capture(id);606 mutex_unlock(&cx->serialize_lock);607 if (rc) {608 CX18_DEBUG_INFO("Could not start capture for %s (%d)\n",609 s->name, rc);610 return EPOLLERR;611 }612 CX18_DEBUG_FILE("Encoder poll started capture\n");613 }614 615 /* add stream's waitq to the poll list */616 CX18_DEBUG_HI_FILE("Encoder poll\n");617 if (v4l2_event_pending(&id->fh))618 res |= EPOLLPRI;619 else620 poll_wait(filp, &s->waitq, wait);621 622 if (atomic_read(&s->q_full.depth))623 return res | EPOLLIN | EPOLLRDNORM;624 if (eof)625 return res | EPOLLHUP;626 return res;627}628 629void cx18_vb_timeout(struct timer_list *t)630{631 struct cx18_stream *s = from_timer(s, t, vb_timeout);632 633 /*634 * Return all of the buffers in error state, so the vbi/vid inode635 * can return from blocking.636 */637 cx18_clear_queue(s, VB2_BUF_STATE_ERROR);638}639 640void cx18_stop_capture(struct cx18_stream *s, int gop_end)641{642 struct cx18 *cx = s->cx;643 struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];644 struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];645 646 CX18_DEBUG_IOCTL("close() of %s\n", s->name);647 648 /* 'Unclaim' this stream */649 650 /* Stop capturing */651 if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) {652 CX18_DEBUG_INFO("close stopping capture\n");653 if (s->type == CX18_ENC_STREAM_TYPE_MPG) {654 /* Stop internal use associated VBI and IDX streams */655 if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) &&656 !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) {657 CX18_DEBUG_INFO("close stopping embedded VBI capture\n");658 cx18_stop_v4l2_encode_stream(s_vbi, 0);659 }660 if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) {661 CX18_DEBUG_INFO("close stopping IDX capture\n");662 cx18_stop_v4l2_encode_stream(s_idx, 0);663 }664 }665 if (s->type == CX18_ENC_STREAM_TYPE_VBI &&666 test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags))667 /* Also used internally, don't stop capturing */668 s->id = -1;669 else670 cx18_stop_v4l2_encode_stream(s, gop_end);671 }672 if (!gop_end) {673 clear_bit(CX18_F_S_APPL_IO, &s->s_flags);674 clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);675 cx18_release_stream(s);676 }677}678 679int cx18_v4l2_close(struct file *filp)680{681 struct v4l2_fh *fh = filp->private_data;682 struct cx18_open_id *id = fh2id(fh);683 struct cx18 *cx = id->cx;684 struct cx18_stream *s = &cx->streams[id->type];685 struct video_device *vdev = &s->video_dev;686 687 CX18_DEBUG_IOCTL("close() of %s\n", s->name);688 689 mutex_lock(&cx->serialize_lock);690 /* Stop radio */691 if (id->type == CX18_ENC_STREAM_TYPE_RAD &&692 v4l2_fh_is_singular_file(filp)) {693 /* Closing radio device, return to TV mode */694 cx18_mute(cx);695 /* Mark that the radio is no longer in use */696 clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags);697 /* Switch tuner to TV */698 cx18_call_all(cx, video, s_std, cx->std);699 /* Select correct audio input (i.e. TV tuner or Line in) */700 cx18_audio_set_io(cx);701 if (atomic_read(&cx->ana_capturing) > 0) {702 /* Undo video mute */703 cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,704 (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute) |705 (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8)));706 }707 /* Done! Unmute and continue. */708 cx18_unmute(cx);709 }710 711 if (id->type == CX18_ENC_STREAM_TYPE_YUV &&712 filp->private_data == vdev->queue->owner) {713 vb2_queue_release(vdev->queue);714 vdev->queue->owner = NULL;715 }716 v4l2_fh_del(fh);717 v4l2_fh_exit(fh);718 719 /* 'Unclaim' this stream */720 if (id->type != CX18_ENC_STREAM_TYPE_YUV && s->id == id->open_id)721 cx18_stop_capture(s, 0);722 kfree(id);723 mutex_unlock(&cx->serialize_lock);724 return 0;725}726 727static int cx18_serialized_open(struct cx18_stream *s, struct file *filp)728{729 struct cx18 *cx = s->cx;730 struct cx18_open_id *item;731 732 CX18_DEBUG_FILE("open %s\n", s->name);733 734 /* Allocate memory */735 item = kzalloc(sizeof(struct cx18_open_id), GFP_KERNEL);736 if (NULL == item) {737 CX18_DEBUG_WARN("nomem on v4l2 open\n");738 return -ENOMEM;739 }740 v4l2_fh_init(&item->fh, &s->video_dev);741 742 item->cx = cx;743 item->type = s->type;744 745 item->open_id = cx->open_id++;746 filp->private_data = &item->fh;747 v4l2_fh_add(&item->fh);748 749 if (item->type == CX18_ENC_STREAM_TYPE_RAD &&750 v4l2_fh_is_singular_file(filp)) {751 if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) {752 if (atomic_read(&cx->ana_capturing) > 0) {753 /* switching to radio while capture is754 in progress is not polite */755 v4l2_fh_del(&item->fh);756 v4l2_fh_exit(&item->fh);757 kfree(item);758 return -EBUSY;759 }760 }761 762 /* Mark that the radio is being used. */763 set_bit(CX18_F_I_RADIO_USER, &cx->i_flags);764 /* We have the radio */765 cx18_mute(cx);766 /* Switch tuner to radio */767 cx18_call_all(cx, tuner, s_radio);768 /* Select the correct audio input (i.e. radio tuner) */769 cx18_audio_set_io(cx);770 /* Done! Unmute and continue. */771 cx18_unmute(cx);772 }773 return 0;774}775 776int cx18_v4l2_open(struct file *filp)777{778 int res;779 struct video_device *video_dev = video_devdata(filp);780 struct cx18_stream *s = video_get_drvdata(video_dev);781 struct cx18 *cx = s->cx;782 783 mutex_lock(&cx->serialize_lock);784 if (cx18_init_on_first_open(cx)) {785 CX18_ERR("Failed to initialize on %s\n",786 video_device_node_name(video_dev));787 mutex_unlock(&cx->serialize_lock);788 return -ENXIO;789 }790 res = cx18_serialized_open(s, filp);791 mutex_unlock(&cx->serialize_lock);792 return res;793}794 795void cx18_mute(struct cx18 *cx)796{797 u32 h;798 if (atomic_read(&cx->ana_capturing)) {799 h = cx18_find_handle(cx);800 if (h != CX18_INVALID_TASK_HANDLE)801 cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1);802 else803 CX18_ERR("Can't find valid task handle for mute\n");804 }805 CX18_DEBUG_INFO("Mute\n");806}807 808void cx18_unmute(struct cx18 *cx)809{810 u32 h;811 if (atomic_read(&cx->ana_capturing)) {812 h = cx18_find_handle(cx);813 if (h != CX18_INVALID_TASK_HANDLE) {814 cx18_msleep_timeout(100, 0);815 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12);816 cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0);817 } else818 CX18_ERR("Can't find valid task handle for unmute\n");819 }820 CX18_DEBUG_INFO("Unmute\n");821}822