| /* |
| * 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. |
| */ |
| |
| #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" |
| #include <media/v4l2-event.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); |
| } |
| |
| __poll_t cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) |
| { |
| __poll_t req_events = poll_requested_events(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); |
| __poll_t res = 0; |
| |
| /* Start a capture if there is none */ |
| if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags) && |
| (req_events & (EPOLLIN | EPOLLRDNORM))) { |
| 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 EPOLLERR; |
| } |
| CX18_DEBUG_FILE("Encoder poll started capture\n"); |
| } |
| |
| if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
| (id->type == CX18_ENC_STREAM_TYPE_YUV)) { |
| __poll_t videobuf_poll = videobuf_poll_stream(filp, &s->vbuf_q, wait); |
| |
| if (v4l2_event_pending(&id->fh)) |
| res |= EPOLLPRI; |
| if (eof && videobuf_poll == EPOLLERR) |
| return res | EPOLLHUP; |
| return res | videobuf_poll; |
| } |
| |
| /* add stream's waitq to the poll list */ |
| CX18_DEBUG_HI_FILE("Encoder poll\n"); |
| if (v4l2_event_pending(&id->fh)) |
| res |= EPOLLPRI; |
| else |
| poll_wait(filp, &s->waitq, wait); |
| |
| if (atomic_read(&s->q_full.depth)) |
| return res | EPOLLIN | EPOLLRDNORM; |
| if (eof) |
| return res | EPOLLHUP; |
| return res; |
| } |
| |
| 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(struct timer_list *t) |
| { |
| struct cx18_stream *s = from_timer(s, t, vb_timeout); |
| 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, video, 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"); |
| } |