static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
{
struct cx18_mailbox __iomem *ack_mb;
u32 ack_irq, req;
switch (order->rpu) {
case APU:
ack_irq = IRQ_EPU_TO_APU_ACK;
ack_mb = &cx->scb->apu2epu_mb;
break;
case CPU:
ack_irq = IRQ_EPU_TO_CPU_ACK;
ack_mb = &cx->scb->cpu2epu_mb;
break;
default:
CX18_WARN("Unhandled RPU (%d) for command %x ack\n",
order->rpu, order->mb.cmd);
return;
}
req = order->mb.request;
/* Don't ack if the RPU has gotten impatient and timed us out */
if (req != cx18_readl(cx, &ack_mb->request) ||
req == cx18_readl(cx, &ack_mb->ack)) {
CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
"incoming %s to EPU mailbox (sequence no. %u) "
"while processing\n",
rpu_str[order->rpu], rpu_str[order->rpu], req);
order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC;
return;
}
cx18_writel(cx, req, &ack_mb->ack);
cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq);
return;
}
/* 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);
}
}
}
void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
{
struct cx18_mailbox __iomem *mb;
struct cx18_mailbox *order_mb;
struct cx18_epu_work_order *order;
int submit;
switch (rpu) {
case CPU:
mb = &cx->scb->cpu2epu_mb;
break;
case APU:
mb = &cx->scb->apu2epu_mb;
break;
default:
return;
}
order = alloc_epu_work_order_irq(cx);
if (order == NULL) {
CX18_WARN("Unable to find blank work order form to schedule "
"incoming mailbox command processing\n");
return;
}
order->flags = 0;
order->rpu = rpu;
order_mb = &order->mb;
/* mb->cmd and mb->args[0] through mb->args[2] */
cx18_memcpy_fromio(cx, &order_mb->cmd, &mb->cmd, 4 * sizeof(u32));
/* mb->request and mb->ack. N.B. we want to read mb->ack last */
cx18_memcpy_fromio(cx, &order_mb->request, &mb->request,
2 * sizeof(u32));
if (order_mb->request == order_mb->ack) {
CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
"incoming %s to EPU mailbox (sequence no. %u)"
"\n",
rpu_str[rpu], rpu_str[rpu], order_mb->request);
if (cx18_debug & CX18_DBGFLG_WARN)
dump_mb(cx, order_mb, "incoming");
order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT;
}
/*
* Individual EPU command processing is responsible for ack-ing
* a non-stale mailbox as soon as possible
*/
submit = epu_cmd_irq(cx, order);
if (submit > 0) {
queue_work(cx->work_queue, &order->work);
}
}
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 = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
if (NULL == item) {
CX18_DEBUG_WARN("nomem on v4l2 open\n");
return -ENOMEM;
}
item->cx = cx;
item->type = s->type;
v4l2_prio_open(&cx->prio, &item->prio);
item->open_id = cx->open_id++;
filp->private_data = item;
if (item->type == CX18_ENC_STREAM_TYPE_RAD) {
/* Try to claim this stream */
if (cx18_claim_stream(item, item->type)) {
/* No, it's already in use */
kfree(item);
return -EBUSY;
}
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 */
cx18_release_stream(s);
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_i2c_clients(cx, AUDC_SET_RADIO, NULL);
/* Select the correct audio input (i.e. radio tuner) */
cx18_audio_set_io(cx);
/* Done! Unmute and continue. */
cx18_unmute(cx);
}
return 0;
}
/* This function releases a previously claimed stream. It will take into
account associated VBI streams. */
static void cx18_release_stream(struct cx18_stream *s)
{
struct cx18 *cx = s->cx;
struct cx18_stream *s_vbi;
s->id = -1;
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 CX18_ENC_STREAM_TYPE_VBI,
for all other streams we're done */
if (s->type == CX18_ENC_STREAM_TYPE_MPG)
s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
else
return;
/* clear internal use flag */
if (!test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags)) {
/* was already cleared */
return;
}
if (s_vbi->id != -1) {
/* VBI stream still claimed by a file descriptor */
return;
}
clear_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags);
cx18_flush_queues(s_vbi);
}
int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
{
u32 data[MAX_MB_ARGUMENTS];
struct cx18 *cx = s->cx;
int captype = 0;
struct cx18_stream *s_idx;
if (!cx18_stream_enabled(s))
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 = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
cx->search_pack_header = 0;
break;
case CX18_ENC_STREAM_TYPE_IDX:
captype = CAPTURE_CHANNEL_TYPE_INDEX;
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);
/*
* Select to receive I, P, and B frame index entries, if the
* index stream is enabled. Otherwise disable index entry
* generation.
*/
s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
/* Call out to the common CX2341x API setup for user controls */
cx->cxhdl.priv = s;
cx2341x_handler_setup(&cx->cxhdl);
/*
* When starting a capture and we're set for radio,
* ensure the video is muted, despite the user control.
*/
if (!cx->cxhdl.video_mute &&
test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
(v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
/* Enable the Video Format Converter for UYVY 4:2:2 support,
* rather than the default HM12 Macroblovk 4:2:0 support.
*/
if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
if (s->pixelformat == V4L2_PIX_FMT_UYVY)
cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
s->handle, 1);
else
/* If in doubt, default to HM12 */
cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
s->handle, 0);
}
}
if (atomic_read(&cx->tot_capturing) == 0) {
cx2341x_handler_set_busy(&cx->cxhdl, 1);
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_stream_configure_mdls(s);
_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;
}
static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
{
const struct cx18_api_info *info = find_api_info(cmd);
u32 state, irq, req, ack, err;
struct cx18_mailbox __iomem *mb;
u32 __iomem *xpu_state;
wait_queue_head_t *waitq;
struct mutex *mb_lock;
long int timeout, ret;
int i;
char argstr[MAX_MB_ARGUMENTS*11+1];
if (info == NULL) {
CX18_WARN("unknown cmd %x\n", cmd);
return -EINVAL;
}
if (cx18_debug & CX18_DBGFLG_API) { /* only call u32arr2hex if needed */
if (cmd == CX18_CPU_DE_SET_MDL) {
if (cx18_debug & CX18_DBGFLG_HIGHVOL)
CX18_DEBUG_HI_API("%s\tcmd %#010x args%s\n",
info->name, cmd,
u32arr2hex(data, args, argstr));
} else
CX18_DEBUG_API("%s\tcmd %#010x args%s\n",
info->name, cmd,
u32arr2hex(data, args, argstr));
}
switch (info->rpu) {
case APU:
waitq = &cx->mb_apu_waitq;
mb_lock = &cx->epu2apu_mb_lock;
irq = IRQ_EPU_TO_APU;
mb = &cx->scb->epu2apu_mb;
xpu_state = &cx->scb->apu_state;
break;
case CPU:
waitq = &cx->mb_cpu_waitq;
mb_lock = &cx->epu2cpu_mb_lock;
irq = IRQ_EPU_TO_CPU;
mb = &cx->scb->epu2cpu_mb;
xpu_state = &cx->scb->cpu_state;
break;
default:
CX18_WARN("Unknown RPU (%d) for API call\n", info->rpu);
return -EINVAL;
}
mutex_lock(mb_lock);
/*
* Wait for an in-use mailbox to complete
*
* If the XPU is responding with Ack's, the mailbox shouldn't be in
* a busy state, since we serialize access to it on our end.
*
* If the wait for ack after sending a previous command was interrupted
* by a signal, we may get here and find a busy mailbox. After waiting,
* mark it "not busy" from our end, if the XPU hasn't ack'ed it still.
*/
state = cx18_readl(cx, xpu_state);
req = cx18_readl(cx, &mb->request);
timeout = msecs_to_jiffies(10);
ret = wait_event_timeout(*waitq,
(ack = cx18_readl(cx, &mb->ack)) == req,
timeout);
if (req != ack) {
/* waited long enough, make the mbox "not busy" from our end */
cx18_writel(cx, req, &mb->ack);
CX18_ERR("mbox was found stuck busy when setting up for %s; "
"clearing busy and trying to proceed\n", info->name);
} else if (ret != timeout)
CX18_DEBUG_API("waited %u msecs for busy mbox to be acked\n",
jiffies_to_msecs(timeout-ret));
/* Build the outgoing mailbox */
req = ((req & 0xfffffffe) == 0xfffffffe) ? 1 : req + 1;
cx18_writel(cx, cmd, &mb->cmd);
for (i = 0; i < args; i++)
cx18_writel(cx, data[i], &mb->args[i]);
cx18_writel(cx, 0, &mb->error);
cx18_writel(cx, req, &mb->request);
cx18_writel(cx, req - 1, &mb->ack); /* ensure ack & req are distinct */
/*
* Notify the XPU and wait for it to send an Ack back
*/
timeout = msecs_to_jiffies((info->flags & API_FAST) ? 10 : 20);
CX18_DEBUG_HI_IRQ("sending interrupt SW1: %x to send %s\n",
irq, info->name);
cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);
ret = wait_event_timeout(
*waitq,
cx18_readl(cx, &mb->ack) == cx18_readl(cx, &mb->request),
timeout);
if (ret == 0) {
/* Timed out */
mutex_unlock(mb_lock);
CX18_DEBUG_WARN("sending %s timed out waiting %d msecs for RPU "
"acknowledgement\n",
info->name, jiffies_to_msecs(timeout));
return -EINVAL;
}
if (ret != timeout)
CX18_DEBUG_HI_API("waited %u msecs for %s to be acked\n",
jiffies_to_msecs(timeout-ret), info->name);
/* Collect data returned by the XPU */
for (i = 0; i < MAX_MB_ARGUMENTS; i++)
data[i] = cx18_readl(cx, &mb->args[i]);
err = cx18_readl(cx, &mb->error);
mutex_unlock(mb_lock);
/*
* Wait for XPU to perform extra actions for the caller in some cases.
* e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all buffers
* back in a burst shortly thereafter
*/
if (info->flags & API_SLOW)
cx18_msleep_timeout(300, 0);
if (err)
CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
info->name);
return err ? -EIO : 0;
}
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;
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 VBI capture if required */
s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
if (s->type == CX18_ENC_STREAM_TYPE_MPG &&
test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
!test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) {
/* Note: the CX18_ENC_STREAM_TYPE_VBI is claimed
automatically when the MPG stream is claimed.
We only need to start the VBI capturing. */
if (cx18_start_v4l2_encode_stream(s_vbi)) {
CX18_DEBUG_WARN("VBI capture start failed\n");
/* Failure, clean up and return an error */
clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags);
clear_bit(CX18_F_S_STREAMING, &s->s_flags);
/* also releases the associated VBI stream */
cx18_release_stream(s);
return -EIO;
}
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;
}
/* failure, clean up */
CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
/* Note: the CX18_ENC_STREAM_TYPE_VBI is released
automatically when the MPG stream is released.
We only need to stop the VBI capturing. */
if (s->type == CX18_ENC_STREAM_TYPE_MPG &&
test_bit(CX18_F_S_STREAMING, &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);
return -EIO;
}
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 &&
cx->vbi.sliced_in->service_set)
single_frame = 1;
for (;;) {
struct cx18_buffer *buf;
int rc;
buf = cx18_get_buffer(s, non_block, &rc);
/* if there is no data available... */
if (buf == 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_buf_to_user(s, buf, ubuf + tot_written,
tot_count - tot_written);
if (buf != &cx->vbi.sliced_mpeg_buf) {
if (buf->readpos == buf->bytesused) {
cx18_buf_sync_for_device(s, buf);
cx18_enqueue(s, buf, &s->q_free);
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);
} else
cx18_enqueue(s, buf, &s->q_io);
} else if (buf->readpos == buf->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 += buf->bytesused;
}
if (rc < 0)
return rc;
tot_written += rc;
if (tot_written == tot_count || single_frame)
break;
}
return tot_written;
}
static size_t cx18_copy_buf_to_user(struct cx18_stream *s,
struct cx18_buffer *buf, char __user *ubuf, size_t ucount)
{
struct cx18 *cx = s->cx;
size_t len = buf->bytesused - buf->readpos;
if (len > ucount)
len = ucount;
if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG &&
cx->vbi.sliced_in->service_set && buf != &cx->vbi.sliced_mpeg_buf) {
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) {
q = memchr(p, 0, start + len - p);
if (q == NULL)
break;
p = q + 1;
if ((char *)q + 15 >= buf->buf + buf->bytesused ||
q[1] != 0 || q[2] != 1 || q[3] != ch)
continue;
if (!cx->search_pack_header) {
if ((q[6] & 0xc0) != 0x80)
continue;
if (((q[7] & 0xc0) == 0x80 &&
(q[9] & 0xf0) == 0x20) ||
((q[7] & 0xc0) == 0xc0 &&
(q[9] & 0xf0) == 0x30)) {
ch = 0xba;
cx->search_pack_header = 1;
p = q + 9;
}
continue;
}
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 &&
(q[4] & 0xc4) == 0x44 &&
(q[12] & 3) == 3 &&
q[14 + stuffing] == 0 &&
q[15 + stuffing] == 0 &&
q[16 + stuffing] == 1) {
cx->search_pack_header = 0;
len = (char *)q - start;
cx18_setup_sliced_vbi_buf(cx);
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;
}
int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
{
u32 data[MAX_MB_ARGUMENTS];
struct cx18 *cx = s->cx;
int captype = 0;
struct cx18_stream *s_idx;
if (!cx18_stream_enabled(s))
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 = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
cx->search_pack_header = 0;
break;
case CX18_ENC_STREAM_TYPE_IDX:
captype = CAPTURE_CHANNEL_TYPE_INDEX;
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
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_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);
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);
if (atomic_read(&cx->ana_capturing) == 0)
cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
s->handle, 12);
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);
s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
cx->cxhdl.priv = s;
cx2341x_handler_setup(&cx->cxhdl);
if (!cx->cxhdl.video_mute &&
test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
(v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
if (s->pixelformat == V4L2_PIX_FMT_UYVY)
cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
s->handle, 1);
else
cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
s->handle, 0);
}
}
if (atomic_read(&cx->tot_capturing) == 0) {
cx2341x_handler_set_busy(&cx->cxhdl, 1);
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);
cx18_stream_configure_mdls(s);
_cx18_stream_load_fw_queue(s);
if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
CX18_DEBUG_WARN("Error starting capture!\n");
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);
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;
}
if (captype != CAPTURE_CHANNEL_TYPE_TS)
atomic_inc(&cx->ana_capturing);
atomic_inc(&cx->tot_capturing);
return 0;
}
int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
{
struct cx18 *cx = s->cx;
unsigned long then;
if (!cx18_stream_enabled(s))
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) {
#if 0
/* only run these if we're shutting down the last cap */
DECLARE_WAITQUEUE(wait, current);
unsigned long duration;
then = jiffies;
add_wait_queue(&cx->cap_w, &wait);
set_current_state(TASK_INTERRUPTIBLE);
/* TODO: wait 2s for EOS interrupt */
while (!test_bit(CX18_F_I_EOS, &cx->i_flags) &&
time_before(jiffies, then + msecs_to_jiffies(2000)))
schedule_timeout(msecs_to_jiffies(10));
duration = jiffies_to_msecs(jiffies - then);
if (!test_bit(CX18_F_I_EOS, &cx->i_flags)) {
CX18_DEBUG_WARN("%s: EOS interrupt not received! stopping anyway.\n", s->name);
CX18_DEBUG_WARN("%s: waited %lu ms.\n", s->name, duration);
} else {
CX18_DEBUG_INFO("%s: EOS took %lu ms to occur.\n", s->name, duration);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&cx->cap_w, &wait);
#else
CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
#endif
}
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;
}
static size_t cx18_copy_buf_to_user(struct cx18_stream *s,
struct cx18_buffer *buf, char __user *ubuf, size_t ucount)
{
struct cx18 *cx = s->cx;
size_t len = buf->bytesused - buf->readpos;
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_buf(cx);
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;
}
