// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* cx18 file operation functions
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*
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* Derived from ivtv-fileops.c
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
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*/
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#include "cx18-driver.h"
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#include "cx18-fileops.h"
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#include "cx18-i2c.h"
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#include "cx18-queue.h"
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#include "cx18-vbi.h"
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#include "cx18-audio.h"
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#include "cx18-mailbox.h"
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#include "cx18-scb.h"
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#include "cx18-streams.h"
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#include "cx18-controls.h"
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#include "cx18-ioctl.h"
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#include "cx18-cards.h"
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#include <media/v4l2-event.h>
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/* This function tries to claim the stream for a specific file descriptor.
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If no one else is using this stream then the stream is claimed and
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associated VBI and IDX streams are also automatically claimed.
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Possible error returns: -EBUSY if someone else has claimed
|
the stream or 0 on success. */
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int cx18_claim_stream(struct cx18_open_id *id, int type)
|
{
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struct cx18 *cx = id->cx;
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struct cx18_stream *s = &cx->streams[type];
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struct cx18_stream *s_assoc;
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/* Nothing should ever try to directly claim the IDX stream */
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if (type == CX18_ENC_STREAM_TYPE_IDX) {
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CX18_WARN("MPEG Index stream cannot be claimed directly, but something tried.\n");
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return -EINVAL;
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}
|
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if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
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/* someone already claimed this stream */
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if (s->id == id->open_id) {
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/* yes, this file descriptor did. So that's OK. */
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return 0;
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}
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if (s->id == -1 && type == CX18_ENC_STREAM_TYPE_VBI) {
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/* 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;
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CX18_DEBUG_INFO("Start Read VBI\n");
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return 0;
|
}
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/* someone else is using this stream already */
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CX18_DEBUG_INFO("Stream %d is busy\n", type);
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return -EBUSY;
|
}
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s->id = id->open_id;
|
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/*
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* 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.
|
*/
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if (type != CX18_ENC_STREAM_TYPE_MPG)
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return 0;
|
|
s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
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if (cx->vbi.insert_mpeg && !cx18_raw_vbi(cx))
|
s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
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else if (!cx18_stream_enabled(s_assoc))
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return 0;
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set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
|
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/* mark that it is used internally */
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set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags);
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return 0;
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}
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EXPORT_SYMBOL(cx18_claim_stream);
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/* This function releases a previously claimed stream. It will take into
|
account associated VBI streams. */
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void cx18_release_stream(struct cx18_stream *s)
|
{
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struct cx18 *cx = s->cx;
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struct cx18_stream *s_assoc;
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s->id = -1;
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if (s->type == CX18_ENC_STREAM_TYPE_IDX) {
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/*
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* The IDX stream is only used internally, and can
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* only be indirectly unclaimed by unclaiming the MPG stream.
|
*/
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return;
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}
|
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if (s->type == CX18_ENC_STREAM_TYPE_VBI &&
|
test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) {
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/* this stream is still in use internally */
|
return;
|
}
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if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
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CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name);
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return;
|
}
|
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cx18_flush_queues(s);
|
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/*
|
* 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);
|
}
|
}
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}
|
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));
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cx18_call_all(cx, tuner, g_tuner, &vt);
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if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 &&
|
(vt.rxsubchans & V4L2_TUNER_SUB_LANG2))
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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");
|
}
|
|
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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;
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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;
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mdl->bytesused = cx->vbi.sliced_mpeg_size[idx];
|
mdl->readpos = 0;
|
}
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|
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 satisfied */
|
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");
|
}
|
