/*
* cx18 init/start/stop/exit stream functions
*
* Derived from ivtv-streams.c
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
* Copyright (C) 2008 Andy Walls <awalls@radix.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-io.h"
#include "cx18-fileops.h"
#include "cx18-mailbox.h"
#include "cx18-i2c.h"
#include "cx18-queue.h"
#include "cx18-ioctl.h"
#include "cx18-streams.h"
#include "cx18-cards.h"
#include "cx18-scb.h"
#include "cx18-dvb.h"
#define CX18_DSP0_INTERRUPT_MASK 0xd0004C
static struct v4l2_file_operations cx18_v4l2_enc_fops = {
.owner = THIS_MODULE,
.read = cx18_v4l2_read,
.open = cx18_v4l2_open,
/* FIXME change to video_ioctl2 if serialization lock can be removed */
.ioctl = cx18_v4l2_ioctl,
.release = cx18_v4l2_close,
.poll = cx18_v4l2_enc_poll,
};
/* offset from 0 to register ts v4l2 minors on */
#define CX18_V4L2_ENC_TS_OFFSET 16
/* offset from 0 to register pcm v4l2 minors on */
#define CX18_V4L2_ENC_PCM_OFFSET 24
/* offset from 0 to register yuv v4l2 minors on */
#define CX18_V4L2_ENC_YUV_OFFSET 32
static struct {
const char *name;
int vfl_type;
int num_offset;
int dma;
enum v4l2_buf_type buf_type;
} cx18_stream_info[] = {
{ /* CX18_ENC_STREAM_TYPE_MPG */
"encoder MPEG",
VFL_TYPE_GRABBER, 0,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
},
{ /* CX18_ENC_STREAM_TYPE_TS */
"TS",
VFL_TYPE_GRABBER, -1,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
},
{ /* CX18_ENC_STREAM_TYPE_YUV */
"encoder YUV",
VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
},
{ /* CX18_ENC_STREAM_TYPE_VBI */
"encoder VBI",
VFL_TYPE_VBI, 0,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
},
{ /* CX18_ENC_STREAM_TYPE_PCM */
"encoder PCM audio",
VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
},
{ /* CX18_ENC_STREAM_TYPE_IDX */
"encoder IDX",
VFL_TYPE_GRABBER, -1,
PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
},
{ /* CX18_ENC_STREAM_TYPE_RAD */
"encoder radio",
VFL_TYPE_RADIO, 0,
PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
},
};
static void cx18_stream_init(struct cx18 *cx, int type)
{
struct cx18_stream *s = &cx->streams[type];
struct video_device *video_dev = s->video_dev;
/* we need to keep video_dev, so restore it afterwards */
memset(s, 0, sizeof(*s));
s->video_dev = video_dev;
/* initialize cx18_stream fields */
s->cx = cx;
s->type = type;
s->name = cx18_stream_info[type].name;
s->handle = CX18_INVALID_TASK_HANDLE;
s->dma = cx18_stream_info[type].dma;
s->buffers = cx->stream_buffers[type];
s->buf_size = cx->stream_buf_size[type];
init_waitqueue_head(&s->waitq);
s->id = -1;
spin_lock_init(&s->q_free.lock);
cx18_queue_init(&s->q_free);
spin_lock_init(&s->q_busy.lock);
cx18_queue_init(&s->q_busy);
spin_lock_init(&s->q_full.lock);
cx18_queue_init(&s->q_full);
INIT_WORK(&s->out_work_order, cx18_out_work_handler);
}
static int cx18_prep_dev(struct cx18 *cx, int type)
{
struct cx18_stream *s = &cx->streams[type];
u32 cap = cx->v4l2_cap;
int num_offset = cx18_stream_info[type].num_offset;
int num = cx->instance + cx18_first_minor + num_offset;
/* These four fields are always initialized. If video_dev == NULL, then
this stream is not in use. In that case no other fields but these
four can be used. */
s->video_dev = NULL;
s->cx = cx;
s->type = type;
s->name = cx18_stream_info[type].name;
/* Check whether the radio is supported */
if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
return 0;
/* Check whether VBI is supported */
if (type == CX18_ENC_STREAM_TYPE_VBI &&
!(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
return 0;
/* User explicitly selected 0 buffers for these streams, so don't
create them. */
if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
cx->stream_buffers[type] == 0) {
CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
return 0;
}
cx18_stream_init(cx, type);
if (num_offset == -1)
return 0;
/* allocate and initialize the v4l2 video device structure */
s->video_dev = video_device_alloc();
if (s->video_dev == NULL) {
CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
s->name);
return -ENOMEM;
}
snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
cx->v4l2_dev.name, s->name);
s->video_dev->num = num;
s->video_dev->v4l2_dev = &cx->v4l2_dev;
s->video_dev->fops = &cx18_v4l2_enc_fops;
s->video_dev->release = video_device_release;
s->video_dev->tvnorms = V4L2_STD_ALL;
cx18_set_funcs(s->video_dev);
return 0;
}
/* Initialize v4l2 variables and register v4l2 devices */
int cx18_streams_setup(struct cx18 *cx)
{
int type, ret;
/* Setup V4L2 Devices */
for (type = 0; type < CX18_MAX_STREAMS; type++) {
/* Prepare device */
ret = cx18_prep_dev(cx, type);
if (ret < 0)
break;
/* Allocate Stream */
ret = cx18_stream_alloc(&cx->streams[type]);
if (ret < 0)
break;
}
if (type == CX18_MAX_STREAMS)
return 0;
/* One or more streams could not be initialized. Clean 'em all up. */
cx18_streams_cleanup(cx, 0);
return ret;
}
static int cx18_reg_dev(struct cx18 *cx, int type)
{
struct cx18_stream *s = &cx->streams[type];
int vfl_type = cx18_stream_info[type].vfl_type;
int num, ret;
/* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
* We need a VFL_TYPE_TS defined.
*/
if (strcmp("TS", s->name) == 0) {
/* just return if no DVB is supported */
if ((cx->card->hw_all & CX18_HW_DVB) == 0)
return 0;
ret = cx18_dvb_register(s);
if (ret < 0) {
CX18_ERR("DVB failed to register\n");
return ret;
}
}
if (s->video_dev == NULL)
return 0;
num = s->video_dev->num;
/* card number + user defined offset + device offset */
if (type != CX18_ENC_STREAM_TYPE_MPG) {
struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
if (s_mpg->video_dev)
num = s_mpg->video_dev->num
+ cx18_stream_info[type].num_offset;
}
video_set_drvdata(s->video_dev, s);
/* Register device. First try the desired minor, then any free one. */
ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
if (ret < 0) {
CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
s->name, num);
video_device_release(s->video_dev);
s->video_dev = NULL;
return ret;
}
num = s->video_dev->num;
switch (vfl_type) {
case VFL_TYPE_GRABBER:
CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
num, s->name, cx->stream_buffers[type],
cx->stream_buf_size[type]/1024);
break;
case VFL_TYPE_RADIO:
CX18_INFO("Registered device radio%d for %s\n",
num, s->name);
break;
case VFL_TYPE_VBI:
if (cx->stream_buffers[type])
CX18_INFO("Registered device vbi%d for %s "
"(%d x %d bytes)\n",
num, s->name, cx->stream_buffers[type],
cx->stream_buf_size[type]);
else
CX18_INFO("Registered device vbi%d for %s\n",
num, s->name);
break;
}
return 0;
}
/* Register v4l2 devices */
int cx18_streams_register(struct cx18 *cx)
{
int type;
int err;
int ret = 0;
/* Register V4L2 devices */
for (type = 0; type < CX18_MAX_STREAMS; type++) {
err = cx18_reg_dev(cx, type);
if (err && ret == 0)
ret = err;
}
if (ret == 0)
return 0;
/* One or more streams could not be initialized. Clean 'em all up. */
cx18_streams_cleanup(cx, 1);
return ret;
}
/* Unregister v4l2 devices */
void cx18_streams_cleanup(struct cx18 *cx, int unregister)
{
struct video_device *vdev;
int type;
/* Teardown all streams */
for (type = 0; type < CX18_MAX_STREAMS; type++) {
if (cx->streams[type].dvb.enabled) {
cx18_dvb_unregister(&cx->streams[type]);
cx->streams[type].dvb.enabled = false;
}
vdev = cx->streams[type].video_dev;
cx->streams[type].video_dev = NULL;
if (vdev == NULL)
continue;
cx18_stream_free(&cx->streams[type]);
/* Unregister or release device */
if (unregister)
video_unregister_device(vdev);
else
video_device_release(vdev);
}
}
static void cx18_vbi_setup(struct cx18_stream *s)
{
struct cx18 *cx = s->cx;
int raw = cx18_raw_vbi(cx);
u32 data[CX2341X_MBOX_MAX_DATA];
int lines;
if (cx->is_60hz) {
cx->vbi.count = 12;
cx->vbi.start[0] = 10;
cx->vbi.start[1] = 273;
} else { /* PAL/SECAM */
cx->vbi.count = 18;
cx->vbi.start[0] = 6;
cx->vbi.start[1] = 318;
}
/* setup VBI registers */
v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
/*
* Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
* VBI when the first analog capture channel starts, as once it starts
* (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
* (i.e. for the VBI capture channels). We also send it for each
* analog capture channel anyway just to make sure we get the proper
* behavior
*/
if (raw) {
lines = cx->vbi.count * 2;
} else {
/*
* For 525/60 systems, according to the VIP 2 & BT.656 std:
* The EAV RP code's Field bit toggles on line 4, a few lines
* after the Vertcal Blank bit has already toggled.
* Tell the encoder to capture 21-4+1=18 lines per field,
* since we want lines 10 through 21.
*
* For 625/50 systems, according to the VIP 2 & BT.656 std:
* The EAV RP code's Field bit toggles on line 1, a few lines
* after the Vertcal Blank bit has already toggled.
* (We've actually set the digitizer so that the Field bit
* toggles on line 2.) Tell the encoder to capture 23-2+1=22
* lines per field, since we want lines 6 through 23.
*/
lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
}
data[0] = s->handle;
/* Lines per field */
data[1] = (lines / 2) | ((lines / 2) << 16);
/* bytes per line */
data[2] = (raw ? vbi_active_samples
: (cx->is_60hz ? vbi_hblank_samples_60Hz
: vbi_hblank_samples_50Hz));
/* Every X number of frames a VBI interrupt arrives
(frames as in 25 or 30 fps) */
data[3] = 1;
/*
* Set the SAV/EAV RP codes to look for as start/stop points
* when in VIP-1.1 mode
*/
if (raw) {
/*
* Start codes for beginning of "active" line in vertical blank
* 0x20 ( VerticalBlank )
* 0x60 ( EvenField VerticalBlank )
*/
data[4] = 0x20602060;
/*
* End codes for end of "active" raw lines and regular lines
* 0x30 ( VerticalBlank HorizontalBlank)
* 0x70 ( EvenField VerticalBlank HorizontalBlank)
* 0x90 (Task HorizontalBlank)
* 0xd0 (Task EvenField HorizontalBlank)
*/
data[5] = 0x307090d0;
} else {
/*
* End codes for active video, we want data in the hblank region
* 0xb0 (Task 0 VerticalBlank HorizontalBlank)
* 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
*
* Since the V bit is only allowed to toggle in the EAV RP code,
* just before the first active region line, these two
* are problematic:
* 0x90 (Task HorizontalBlank)
* 0xd0 (Task EvenField HorizontalBlank)
*
* We have set the digitzer such that we don't have to worry
* about these problem codes.
*/
data[4] = 0xB0F0B0F0;
/*
* Start codes for beginning of active line in vertical blank
* 0xa0 (Task VerticalBlank )
* 0xe0 (Task EvenField VerticalBlank )
*/
data[5] = 0xA0E0A0E0;
}
CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
data[0], data[1], data[2], data[3], data[4], data[5]);
cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
}
static
struct cx18_queue *_cx18_stream_put_buf_fw(struct cx18_stream *s,
struct cx18_buffer *buf)
{
struct cx18 *cx = s->cx;
struct cx18_queue *q;
/* Don't give it to the firmware, if we're not running a capture */
if (s->handle == CX18_INVALID_TASK_HANDLE ||
test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
!test_bit(CX18_F_S_STREAMING, &s->s_flags))
return cx18_enqueue(s, buf, &s->q_free);
q = cx18_enqueue(s, buf, &s->q_busy);
if (q != &s->q_busy)
return q; /* The firmware has the max buffers it can handle */
cx18_buf_sync_for_device(s, buf);
cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
(void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
1, buf->id, s->buf_size);
return q;
}
static
void _cx18_stream_load_fw_queue(struct cx18_stream *s)
{
struct cx18_queue *q;
struct cx18_buffer *buf;
if (atomic_read(&s->q_free.buffers) == 0 ||
atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
return;
/* Move from q_free to q_busy notifying the firmware, until the limit */
do {
buf = cx18_dequeue(s, &s->q_free);
if (buf == NULL)
break;
q = _cx18_stream_put_buf_fw(s, buf);
} while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
&& q == &s->q_busy);
}
void cx18_out_work_handler(struct work_struct *work)
{
struct cx18_stream *s =
container_of(work, struct cx18_stream, out_work_order);
_cx18_stream_load_fw_queue(s);
}
int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
{
u32 data[MAX_MB_ARGUMENTS];
struct cx18 *cx = s->cx;
struct cx18_buffer *buf;
int captype = 0;
struct cx18_api_func_private priv;
if (s->video_dev == NULL && s->dvb.enabled == 0)
return -EINVAL;
CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
switch (s->type) {
case CX18_ENC_STREAM_TYPE_MPG:
captype = CAPTURE_CHANNEL_TYPE_MPEG;
cx->mpg_data_received = cx->vbi_data_inserted = 0;
cx->dualwatch_jiffies = jiffies;
cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
cx->search_pack_header = 0;
break;
case CX18_ENC_STREAM_TYPE_TS:
captype = CAPTURE_CHANNEL_TYPE_TS;
break;
case CX18_ENC_STREAM_TYPE_YUV:
captype = CAPTURE_CHANNEL_TYPE_YUV;
break;
case CX18_ENC_STREAM_TYPE_PCM:
captype = CAPTURE_CHANNEL_TYPE_PCM;
break;
case CX18_ENC_STREAM_TYPE_VBI:
#ifdef CX18_ENCODER_PARSES_SLICED
captype = cx18_raw_vbi(cx) ?
CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
#else
/*
* Currently we set things up so that Sliced VBI from the
* digitizer is handled as Raw VBI by the encoder
*/
captype = CAPTURE_CHANNEL_TYPE_VBI;
#endif
cx->vbi.frame = 0;
cx->vbi.inserted_frame = 0;
memset(cx->vbi.sliced_mpeg_size,
0, sizeof(cx->vbi.sliced_mpeg_size));
break;
default:
return -EINVAL;
}
/* Clear Streamoff flags in case left from last capture */
clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
s->handle = data[0];
cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
/*
* For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
* set up all the parameters, as it is not obvious which parameters the
* firmware shares across capture channel types and which it does not.
*
* Some of the cx18_vapi() calls below apply to only certain capture
* channel types. We're hoping there's no harm in calling most of them
* anyway, as long as the values are all consistent. Setting some
* shared parameters will have no effect once an analog capture channel
* has started streaming.
*/
if (captype != CAPTURE_CHANNEL_TYPE_TS) {
cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
/*
* Audio related reset according to
* Documentation/video4linux/cx2341x/fw-encoder-api.txt
*/
if (atomic_read(&cx->ana_capturing) == 0)
cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
s->handle, 12);
/*
* Number of lines for Field 1 & Field 2 according to
* Documentation/video4linux/cx2341x/fw-encoder-api.txt
* Field 1 is 312 for 625 line systems in BT.656
* Field 2 is 313 for 625 line systems in BT.656
*/
cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
s->handle, 312, 313);
if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
cx18_vbi_setup(s);
/*
* assign program index info.
* Mask 7: select I/P/B, Num_req: 400 max
* FIXME - currently we have this hardcoded as disabled
*/
cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
/* Call out to the common CX2341x API setup for user controls */
priv.cx = cx;
priv.s = s;
cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
/*
* When starting a capture and we're set for radio,
* ensure the video is muted, despite the user control.
*/
if (!cx->params.video_mute &&
test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
(cx->params.video_mute_yuv << 8) | 1);
}
if (atomic_read(&cx->tot_capturing) == 0) {
clear_bit(CX18_F_I_EOS, &cx->i_flags);
cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
}
cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
/* Init all the cpu_mdls for this stream */
cx18_flush_queues(s);
spin_lock(&s->q_free.lock);
list_for_each_entry(buf, &s->q_free.list, list) {
cx18_writel(cx, buf->dma_handle,
&cx->scb->cpu_mdl[buf->id].paddr);
cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
}
spin_unlock(&s->q_free.lock);
_cx18_stream_load_fw_queue(s);
/* begin_capture */
if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
CX18_DEBUG_WARN("Error starting capture!\n");
/* Ensure we're really not capturing before releasing MDLs */
set_bit(CX18_F_S_STOPPING, &s->s_flags);
if (s->type == CX18_ENC_STREAM_TYPE_MPG)
cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
else
cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
clear_bit(CX18_F_S_STREAMING, &s->s_flags);
/* FIXME - CX18_F_S_STREAMOFF as well? */
cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
s->handle = CX18_INVALID_TASK_HANDLE;
clear_bit(CX18_F_S_STOPPING, &s->s_flags);
if (atomic_read(&cx->tot_capturing) == 0) {
set_bit(CX18_F_I_EOS, &cx->i_flags);
cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
}
return -EINVAL;
}
/* you're live! sit back and await interrupts :) */
if (captype != CAPTURE_CHANNEL_TYPE_TS)
atomic_inc(&cx->ana_capturing);
atomic_inc(&cx->tot_capturing);
return 0;
}
void cx18_stop_all_captures(struct cx18 *cx)
{
int i;
for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
struct cx18_stream *s = &cx->streams[i];
if (s->video_dev == NULL && s->dvb.enabled == 0)
continue;
if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
cx18_stop_v4l2_encode_stream(s, 0);
}
}
int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
{
struct cx18 *cx = s->cx;
unsigned long then;
if (s->video_dev == NULL && s->dvb.enabled == 0)
return -EINVAL;
/* This function assumes that you are allowed to stop the capture
and that we are actually capturing */
CX18_DEBUG_INFO("Stop Capture\n");
if (atomic_read(&cx->tot_capturing) == 0)
return 0;
set_bit(CX18_F_S_STOPPING, &s->s_flags);
if (s->type == CX18_ENC_STREAM_TYPE_MPG)
cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
else
cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
then = jiffies;
if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
}
if (s->type != CX18_ENC_STREAM_TYPE_TS)
atomic_dec(&cx->ana_capturing);
atomic_dec(&cx->tot_capturing);
/* Clear capture and no-read bits */
clear_bit(CX18_F_S_STREAMING, &s->s_flags);
/* Tell the CX23418 it can't use our buffers anymore */
cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
s->handle = CX18_INVALID_TASK_HANDLE;
clear_bit(CX18_F_S_STOPPING, &s->s_flags);
if (atomic_read(&cx->tot_capturing) > 0)
return 0;
cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
wake_up(&s->waitq);
return 0;
}
u32 cx18_find_handle(struct cx18 *cx)
{
int i;
/* find first available handle to be used for global settings */
for (i = 0; i < CX18_MAX_STREAMS; i++) {
struct cx18_stream *s = &cx->streams[i];
if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
return s->handle;
}
return CX18_INVALID_TASK_HANDLE;
}
struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
{
int i;
struct cx18_stream *s;
if (handle == CX18_INVALID_TASK_HANDLE)
return NULL;
for (i = 0; i < CX18_MAX_STREAMS; i++) {
s = &cx->streams[i];
if (s->handle != handle)
continue;
if (s->video_dev || s->dvb.enabled)
return s;
}
return NULL;
}
