diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-fileops.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-fileops.c | 881 |
1 files changed, 0 insertions, 881 deletions
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c deleted file mode 100644 index 4bfd865a4106..000000000000 --- a/drivers/media/video/cx18/cx18-fileops.c +++ /dev/null @@ -1,881 +0,0 @@ -/* - * cx18 file operation functions - * - * Derived from ivtv-fileops.c - * - * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> - * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - * 02111-1307 USA - */ - -#include "cx18-driver.h" -#include "cx18-fileops.h" -#include "cx18-i2c.h" -#include "cx18-queue.h" -#include "cx18-vbi.h" -#include "cx18-audio.h" -#include "cx18-mailbox.h" -#include "cx18-scb.h" -#include "cx18-streams.h" -#include "cx18-controls.h" -#include "cx18-ioctl.h" -#include "cx18-cards.h" - -/* This function tries to claim the stream for a specific file descriptor. - If no one else is using this stream then the stream is claimed and - associated VBI and IDX streams are also automatically claimed. - Possible error returns: -EBUSY if someone else has claimed - the stream or 0 on success. */ -int cx18_claim_stream(struct cx18_open_id *id, int type) -{ - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[type]; - struct cx18_stream *s_assoc; - - /* Nothing should ever try to directly claim the IDX stream */ - if (type == CX18_ENC_STREAM_TYPE_IDX) { - CX18_WARN("MPEG Index stream cannot be claimed " - "directly, but something tried.\n"); - return -EINVAL; - } - - if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) { - /* someone already claimed this stream */ - if (s->id == id->open_id) { - /* yes, this file descriptor did. So that's OK. */ - return 0; - } - if (s->id == -1 && type == CX18_ENC_STREAM_TYPE_VBI) { - /* VBI is handled already internally, now also assign - the file descriptor to this stream for external - reading of the stream. */ - s->id = id->open_id; - CX18_DEBUG_INFO("Start Read VBI\n"); - return 0; - } - /* someone else is using this stream already */ - CX18_DEBUG_INFO("Stream %d is busy\n", type); - return -EBUSY; - } - s->id = id->open_id; - - /* - * CX18_ENC_STREAM_TYPE_MPG needs to claim: - * CX18_ENC_STREAM_TYPE_VBI, if VBI insertion is on for sliced VBI, or - * CX18_ENC_STREAM_TYPE_IDX, if VBI insertion is off for sliced VBI - * (We don't yet fix up MPEG Index entries for our inserted packets). - * - * For all other streams we're done. - */ - if (type != CX18_ENC_STREAM_TYPE_MPG) - return 0; - - s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; - if (cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) - s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - else if (!cx18_stream_enabled(s_assoc)) - return 0; - - set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); - - /* mark that it is used internally */ - set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags); - return 0; -} -EXPORT_SYMBOL(cx18_claim_stream); - -/* This function releases a previously claimed stream. It will take into - account associated VBI streams. */ -void cx18_release_stream(struct cx18_stream *s) -{ - struct cx18 *cx = s->cx; - struct cx18_stream *s_assoc; - - s->id = -1; - if (s->type == CX18_ENC_STREAM_TYPE_IDX) { - /* - * The IDX stream is only used internally, and can - * only be indirectly unclaimed by unclaiming the MPG stream. - */ - return; - } - - if (s->type == CX18_ENC_STREAM_TYPE_VBI && - test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) { - /* this stream is still in use internally */ - return; - } - if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) { - CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name); - return; - } - - cx18_flush_queues(s); - - /* - * CX18_ENC_STREAM_TYPE_MPG needs to release the - * CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams. - * - * For all other streams we're done. - */ - if (s->type != CX18_ENC_STREAM_TYPE_MPG) - return; - - /* Unclaim the associated MPEG Index stream */ - s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; - if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { - clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); - cx18_flush_queues(s_assoc); - } - - /* Unclaim the associated VBI stream */ - s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) { - if (s_assoc->id == -1) { - /* - * The VBI stream is not still claimed by a file - * descriptor, so completely unclaim it. - */ - clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags); - cx18_flush_queues(s_assoc); - } - } -} -EXPORT_SYMBOL(cx18_release_stream); - -static void cx18_dualwatch(struct cx18 *cx) -{ - struct v4l2_tuner vt; - u32 new_stereo_mode; - const u32 dual = 0x0200; - - new_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode); - memset(&vt, 0, sizeof(vt)); - cx18_call_all(cx, tuner, g_tuner, &vt); - if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && - (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) - new_stereo_mode = dual; - - if (new_stereo_mode == cx->dualwatch_stereo_mode) - return; - - CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n", - cx->dualwatch_stereo_mode, new_stereo_mode); - if (v4l2_ctrl_s_ctrl(cx->cxhdl.audio_mode, new_stereo_mode)) - CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); -} - - -static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block, - int *err) -{ - struct cx18 *cx = s->cx; - struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - struct cx18_mdl *mdl; - DEFINE_WAIT(wait); - - *err = 0; - while (1) { - if (s->type == CX18_ENC_STREAM_TYPE_MPG) { - /* Process pending program updates and VBI data */ - if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { - cx->dualwatch_jiffies = jiffies; - cx18_dualwatch(cx); - } - if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && - !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { - while ((mdl = cx18_dequeue(s_vbi, - &s_vbi->q_full))) { - /* byteswap and process VBI data */ - cx18_process_vbi_data(cx, mdl, - s_vbi->type); - cx18_stream_put_mdl_fw(s_vbi, mdl); - } - } - mdl = &cx->vbi.sliced_mpeg_mdl; - if (mdl->readpos != mdl->bytesused) - return mdl; - } - - /* do we have new data? */ - mdl = cx18_dequeue(s, &s->q_full); - if (mdl) { - if (!test_and_clear_bit(CX18_F_M_NEED_SWAP, - &mdl->m_flags)) - return mdl; - if (s->type == CX18_ENC_STREAM_TYPE_MPG) - /* byteswap MPG data */ - cx18_mdl_swap(mdl); - else { - /* byteswap and process VBI data */ - cx18_process_vbi_data(cx, mdl, s->type); - } - return mdl; - } - - /* return if end of stream */ - if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) { - CX18_DEBUG_INFO("EOS %s\n", s->name); - return NULL; - } - - /* return if file was opened with O_NONBLOCK */ - if (non_block) { - *err = -EAGAIN; - return NULL; - } - - /* wait for more data to arrive */ - prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); - /* New buffers might have become available before we were added - to the waitqueue */ - if (!atomic_read(&s->q_full.depth)) - schedule(); - finish_wait(&s->waitq, &wait); - if (signal_pending(current)) { - /* return if a signal was received */ - CX18_DEBUG_INFO("User stopped %s\n", s->name); - *err = -EINTR; - return NULL; - } - } -} - -static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx) -{ - struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl; - struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf; - int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; - - buf->buf = cx->vbi.sliced_mpeg_data[idx]; - buf->bytesused = cx->vbi.sliced_mpeg_size[idx]; - buf->readpos = 0; - - mdl->curr_buf = NULL; - mdl->bytesused = cx->vbi.sliced_mpeg_size[idx]; - mdl->readpos = 0; -} - -static size_t cx18_copy_buf_to_user(struct cx18_stream *s, - struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop) -{ - struct cx18 *cx = s->cx; - size_t len = buf->bytesused - buf->readpos; - - *stop = false; - if (len > ucount) - len = ucount; - if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && - !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { - /* - * Try to find a good splice point in the PS, just before - * an MPEG-2 Program Pack start code, and provide only - * up to that point to the user, so it's easy to insert VBI data - * the next time around. - * - * This will not work for an MPEG-2 TS and has only been - * verified by analysis to work for an MPEG-2 PS. Helen Buus - * pointed out this works for the CX23416 MPEG-2 DVD compatible - * stream, and research indicates both the MPEG 2 SVCD and DVD - * stream types use an MPEG-2 PS container. - */ - /* - * An MPEG-2 Program Stream (PS) is a series of - * MPEG-2 Program Packs terminated by an - * MPEG Program End Code after the last Program Pack. - * A Program Pack may hold a PS System Header packet and any - * number of Program Elementary Stream (PES) Packets - */ - const char *start = buf->buf + buf->readpos; - const char *p = start + 1; - const u8 *q; - u8 ch = cx->search_pack_header ? 0xba : 0xe0; - int stuffing, i; - - while (start + len > p) { - /* Scan for a 0 to find a potential MPEG-2 start code */ - q = memchr(p, 0, start + len - p); - if (q == NULL) - break; - p = q + 1; - /* - * Keep looking if not a - * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba - * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 - */ - if ((char *)q + 15 >= buf->buf + buf->bytesused || - q[1] != 0 || q[2] != 1 || q[3] != ch) - continue; - - /* If expecting the primary video PES */ - if (!cx->search_pack_header) { - /* Continue if it couldn't be a PES packet */ - if ((q[6] & 0xc0) != 0x80) - continue; - /* Check if a PTS or PTS & DTS follow */ - if (((q[7] & 0xc0) == 0x80 && /* PTS only */ - (q[9] & 0xf0) == 0x20) || /* PTS only */ - ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ - (q[9] & 0xf0) == 0x30)) { /* DTS follows */ - /* Assume we found the video PES hdr */ - ch = 0xba; /* next want a Program Pack*/ - cx->search_pack_header = 1; - p = q + 9; /* Skip this video PES hdr */ - } - continue; - } - - /* We may have found a Program Pack start code */ - - /* Get the count of stuffing bytes & verify them */ - stuffing = q[13] & 7; - /* all stuffing bytes must be 0xff */ - for (i = 0; i < stuffing; i++) - if (q[14 + i] != 0xff) - break; - if (i == stuffing && /* right number of stuffing bytes*/ - (q[4] & 0xc4) == 0x44 && /* marker check */ - (q[12] & 3) == 3 && /* marker check */ - q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ - q[15 + stuffing] == 0 && - q[16 + stuffing] == 1) { - /* We declare we actually found a Program Pack*/ - cx->search_pack_header = 0; /* expect vid PES */ - len = (char *)q - start; - cx18_setup_sliced_vbi_mdl(cx); - *stop = true; - break; - } - } - } - if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { - CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n", - len, s->name); - return -EFAULT; - } - buf->readpos += len; - if (s->type == CX18_ENC_STREAM_TYPE_MPG && - buf != &cx->vbi.sliced_mpeg_buf) - cx->mpg_data_received += len; - return len; -} - -static size_t cx18_copy_mdl_to_user(struct cx18_stream *s, - struct cx18_mdl *mdl, char __user *ubuf, size_t ucount) -{ - size_t tot_written = 0; - int rc; - bool stop = false; - - if (mdl->curr_buf == NULL) - mdl->curr_buf = list_first_entry(&mdl->buf_list, - struct cx18_buffer, list); - - if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) { - /* - * For some reason we've exhausted the buffers, but the MDL - * object still said some data was unread. - * Fix that and bail out. - */ - mdl->readpos = mdl->bytesused; - return 0; - } - - list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) { - - if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused) - continue; - - rc = cx18_copy_buf_to_user(s, mdl->curr_buf, ubuf + tot_written, - ucount - tot_written, &stop); - if (rc < 0) - return rc; - mdl->readpos += rc; - tot_written += rc; - - if (stop || /* Forced stopping point for VBI insertion */ - tot_written >= ucount || /* Reader request statisfied */ - mdl->curr_buf->readpos < mdl->curr_buf->bytesused || - mdl->readpos >= mdl->bytesused) /* MDL buffers drained */ - break; - } - return tot_written; -} - -static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, - size_t tot_count, int non_block) -{ - struct cx18 *cx = s->cx; - size_t tot_written = 0; - int single_frame = 0; - - if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) { - /* shouldn't happen */ - CX18_DEBUG_WARN("Stream %s not initialized before read\n", - s->name); - return -EIO; - } - - /* Each VBI buffer is one frame, the v4l2 API says that for VBI the - frames should arrive one-by-one, so make sure we never output more - than one VBI frame at a time */ - if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx)) - single_frame = 1; - - for (;;) { - struct cx18_mdl *mdl; - int rc; - - mdl = cx18_get_mdl(s, non_block, &rc); - /* if there is no data available... */ - if (mdl == NULL) { - /* if we got data, then return that regardless */ - if (tot_written) - break; - /* EOS condition */ - if (rc == 0) { - clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); - clear_bit(CX18_F_S_APPL_IO, &s->s_flags); - cx18_release_stream(s); - } - /* set errno */ - return rc; - } - - rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written, - tot_count - tot_written); - - if (mdl != &cx->vbi.sliced_mpeg_mdl) { - if (mdl->readpos == mdl->bytesused) - cx18_stream_put_mdl_fw(s, mdl); - else - cx18_push(s, mdl, &s->q_full); - } else if (mdl->readpos == mdl->bytesused) { - int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; - - cx->vbi.sliced_mpeg_size[idx] = 0; - cx->vbi.inserted_frame++; - cx->vbi_data_inserted += mdl->bytesused; - } - if (rc < 0) - return rc; - tot_written += rc; - - if (tot_written == tot_count || single_frame) - break; - } - return tot_written; -} - -static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf, - size_t count, loff_t *pos, int non_block) -{ - ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0; - struct cx18 *cx = s->cx; - - CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); - if (rc > 0) - pos += rc; - return rc; -} - -int cx18_start_capture(struct cx18_open_id *id) -{ - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - struct cx18_stream *s_vbi; - struct cx18_stream *s_idx; - - if (s->type == CX18_ENC_STREAM_TYPE_RAD) { - /* you cannot read from these stream types. */ - return -EPERM; - } - - /* Try to claim this stream. */ - if (cx18_claim_stream(id, s->type)) - return -EBUSY; - - /* If capture is already in progress, then we also have to - do nothing extra. */ - if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || - test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { - set_bit(CX18_F_S_APPL_IO, &s->s_flags); - return 0; - } - - /* Start associated VBI or IDX stream capture if required */ - s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; - if (s->type == CX18_ENC_STREAM_TYPE_MPG) { - /* - * The VBI and IDX streams should have been claimed - * automatically, if for internal use, when the MPG stream was - * claimed. We only need to start these streams capturing. - */ - if (test_bit(CX18_F_S_INTERNAL_USE, &s_idx->s_flags) && - !test_and_set_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { - if (cx18_start_v4l2_encode_stream(s_idx)) { - CX18_DEBUG_WARN("IDX capture start failed\n"); - clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); - goto start_failed; - } - CX18_DEBUG_INFO("IDX capture started\n"); - } - if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && - !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { - if (cx18_start_v4l2_encode_stream(s_vbi)) { - CX18_DEBUG_WARN("VBI capture start failed\n"); - clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); - goto start_failed; - } - CX18_DEBUG_INFO("VBI insertion started\n"); - } - } - - /* Tell the card to start capturing */ - if (!cx18_start_v4l2_encode_stream(s)) { - /* We're done */ - set_bit(CX18_F_S_APPL_IO, &s->s_flags); - /* Resume a possibly paused encoder */ - if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags)) - cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle); - return 0; - } - -start_failed: - CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); - - /* - * The associated VBI and IDX streams for internal use are released - * automatically when the MPG stream is released. We only need to stop - * the associated stream. - */ - if (s->type == CX18_ENC_STREAM_TYPE_MPG) { - /* Stop the IDX stream which is always for internal use */ - if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { - cx18_stop_v4l2_encode_stream(s_idx, 0); - clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags); - } - /* Stop the VBI stream, if only running for internal use */ - if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && - !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { - cx18_stop_v4l2_encode_stream(s_vbi, 0); - clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); - } - } - clear_bit(CX18_F_S_STREAMING, &s->s_flags); - cx18_release_stream(s); /* Also releases associated streams */ - return -EIO; -} - -ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, - loff_t *pos) -{ - struct cx18_open_id *id = file2id(filp); - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - int rc; - - CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); - - mutex_lock(&cx->serialize_lock); - rc = cx18_start_capture(id); - mutex_unlock(&cx->serialize_lock); - if (rc) - return rc; - - if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && - (id->type == CX18_ENC_STREAM_TYPE_YUV)) { - return videobuf_read_stream(&s->vbuf_q, buf, count, pos, 0, - filp->f_flags & O_NONBLOCK); - } - - return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); -} - -unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) -{ - struct cx18_open_id *id = file2id(filp); - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); - - /* Start a capture if there is none */ - if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { - int rc; - - mutex_lock(&cx->serialize_lock); - rc = cx18_start_capture(id); - mutex_unlock(&cx->serialize_lock); - if (rc) { - CX18_DEBUG_INFO("Could not start capture for %s (%d)\n", - s->name, rc); - return POLLERR; - } - CX18_DEBUG_FILE("Encoder poll started capture\n"); - } - - if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && - (id->type == CX18_ENC_STREAM_TYPE_YUV)) { - int videobuf_poll = videobuf_poll_stream(filp, &s->vbuf_q, wait); - if (eof && videobuf_poll == POLLERR) - return POLLHUP; - else - return videobuf_poll; - } - - /* add stream's waitq to the poll list */ - CX18_DEBUG_HI_FILE("Encoder poll\n"); - poll_wait(filp, &s->waitq, wait); - - if (atomic_read(&s->q_full.depth)) - return POLLIN | POLLRDNORM; - if (eof) - return POLLHUP; - return 0; -} - -int cx18_v4l2_mmap(struct file *file, struct vm_area_struct *vma) -{ - struct cx18_open_id *id = file->private_data; - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); - - if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && - (id->type == CX18_ENC_STREAM_TYPE_YUV)) { - - /* Start a capture if there is none */ - if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { - int rc; - - mutex_lock(&cx->serialize_lock); - rc = cx18_start_capture(id); - mutex_unlock(&cx->serialize_lock); - if (rc) { - CX18_DEBUG_INFO( - "Could not start capture for %s (%d)\n", - s->name, rc); - return -EINVAL; - } - CX18_DEBUG_FILE("Encoder mmap started capture\n"); - } - - return videobuf_mmap_mapper(&s->vbuf_q, vma); - } - - return -EINVAL; -} - -void cx18_vb_timeout(unsigned long data) -{ - struct cx18_stream *s = (struct cx18_stream *)data; - struct cx18_videobuf_buffer *buf; - unsigned long flags; - - /* Return all of the buffers in error state, so the vbi/vid inode - * can return from blocking. - */ - spin_lock_irqsave(&s->vb_lock, flags); - while (!list_empty(&s->vb_capture)) { - buf = list_entry(s->vb_capture.next, - struct cx18_videobuf_buffer, vb.queue); - list_del(&buf->vb.queue); - buf->vb.state = VIDEOBUF_ERROR; - wake_up(&buf->vb.done); - } - spin_unlock_irqrestore(&s->vb_lock, flags); -} - -void cx18_stop_capture(struct cx18_open_id *id, int gop_end) -{ - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX]; - - CX18_DEBUG_IOCTL("close() of %s\n", s->name); - - /* 'Unclaim' this stream */ - - /* Stop capturing */ - if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { - CX18_DEBUG_INFO("close stopping capture\n"); - if (id->type == CX18_ENC_STREAM_TYPE_MPG) { - /* Stop internal use associated VBI and IDX streams */ - if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && - !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { - CX18_DEBUG_INFO("close stopping embedded VBI " - "capture\n"); - cx18_stop_v4l2_encode_stream(s_vbi, 0); - } - if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) { - CX18_DEBUG_INFO("close stopping IDX capture\n"); - cx18_stop_v4l2_encode_stream(s_idx, 0); - } - } - if (id->type == CX18_ENC_STREAM_TYPE_VBI && - test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) - /* Also used internally, don't stop capturing */ - s->id = -1; - else - cx18_stop_v4l2_encode_stream(s, gop_end); - } - if (!gop_end) { - clear_bit(CX18_F_S_APPL_IO, &s->s_flags); - clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); - cx18_release_stream(s); - } -} - -int cx18_v4l2_close(struct file *filp) -{ - struct v4l2_fh *fh = filp->private_data; - struct cx18_open_id *id = fh2id(fh); - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - - CX18_DEBUG_IOCTL("close() of %s\n", s->name); - - mutex_lock(&cx->serialize_lock); - /* Stop radio */ - if (id->type == CX18_ENC_STREAM_TYPE_RAD && - v4l2_fh_is_singular_file(filp)) { - /* Closing radio device, return to TV mode */ - cx18_mute(cx); - /* Mark that the radio is no longer in use */ - clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); - /* Switch tuner to TV */ - cx18_call_all(cx, core, s_std, cx->std); - /* Select correct audio input (i.e. TV tuner or Line in) */ - cx18_audio_set_io(cx); - if (atomic_read(&cx->ana_capturing) > 0) { - /* Undo video mute */ - cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, - (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute) | - (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8))); - } - /* Done! Unmute and continue. */ - cx18_unmute(cx); - } - - v4l2_fh_del(fh); - v4l2_fh_exit(fh); - - /* 'Unclaim' this stream */ - if (s->id == id->open_id) - cx18_stop_capture(id, 0); - kfree(id); - mutex_unlock(&cx->serialize_lock); - return 0; -} - -static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) -{ - struct cx18 *cx = s->cx; - struct cx18_open_id *item; - - CX18_DEBUG_FILE("open %s\n", s->name); - - /* Allocate memory */ - item = kzalloc(sizeof(struct cx18_open_id), GFP_KERNEL); - if (NULL == item) { - CX18_DEBUG_WARN("nomem on v4l2 open\n"); - return -ENOMEM; - } - v4l2_fh_init(&item->fh, s->video_dev); - - item->cx = cx; - item->type = s->type; - - item->open_id = cx->open_id++; - filp->private_data = &item->fh; - v4l2_fh_add(&item->fh); - - if (item->type == CX18_ENC_STREAM_TYPE_RAD && - v4l2_fh_is_singular_file(filp)) { - if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { - if (atomic_read(&cx->ana_capturing) > 0) { - /* switching to radio while capture is - in progress is not polite */ - v4l2_fh_del(&item->fh); - v4l2_fh_exit(&item->fh); - kfree(item); - return -EBUSY; - } - } - - /* Mark that the radio is being used. */ - set_bit(CX18_F_I_RADIO_USER, &cx->i_flags); - /* We have the radio */ - cx18_mute(cx); - /* Switch tuner to radio */ - cx18_call_all(cx, tuner, s_radio); - /* Select the correct audio input (i.e. radio tuner) */ - cx18_audio_set_io(cx); - /* Done! Unmute and continue. */ - cx18_unmute(cx); - } - return 0; -} - -int cx18_v4l2_open(struct file *filp) -{ - int res; - struct video_device *video_dev = video_devdata(filp); - struct cx18_stream *s = video_get_drvdata(video_dev); - struct cx18 *cx = s->cx; - - mutex_lock(&cx->serialize_lock); - if (cx18_init_on_first_open(cx)) { - CX18_ERR("Failed to initialize on %s\n", - video_device_node_name(video_dev)); - mutex_unlock(&cx->serialize_lock); - return -ENXIO; - } - res = cx18_serialized_open(s, filp); - mutex_unlock(&cx->serialize_lock); - return res; -} - -void cx18_mute(struct cx18 *cx) -{ - u32 h; - if (atomic_read(&cx->ana_capturing)) { - h = cx18_find_handle(cx); - if (h != CX18_INVALID_TASK_HANDLE) - cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1); - else - CX18_ERR("Can't find valid task handle for mute\n"); - } - CX18_DEBUG_INFO("Mute\n"); -} - -void cx18_unmute(struct cx18 *cx) -{ - u32 h; - if (atomic_read(&cx->ana_capturing)) { - h = cx18_find_handle(cx); - if (h != CX18_INVALID_TASK_HANDLE) { - cx18_msleep_timeout(100, 0); - cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12); - cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0); - } else - CX18_ERR("Can't find valid task handle for unmute\n"); - } - CX18_DEBUG_INFO("Unmute\n"); -} |
