diff options
Diffstat (limited to 'drivers/media/pci/cx18/cx18-fileops.c')
| -rw-r--r-- | drivers/media/pci/cx18/cx18-fileops.c | 881 |
1 files changed, 881 insertions, 0 deletions
diff --git a/drivers/media/pci/cx18/cx18-fileops.c b/drivers/media/pci/cx18/cx18-fileops.c new file mode 100644 index 0000000..4bfd865 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-fileops.c @@ -0,0 +1,881 @@ +/* + * 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"); +} |
