Exemplo n.º 1
0
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;
}
Exemplo n.º 2
0
/* 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);
		}
	}
}
Exemplo n.º 3
0
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);
	}
}
Exemplo n.º 4
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 = 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;
}
Exemplo n.º 5
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);
}
Exemplo n.º 6
0
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;
}
Exemplo n.º 7
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;
}
Exemplo n.º 8
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;
}
Exemplo n.º 9
0
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;
}
Exemplo n.º 10
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 &&
            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;
}
Exemplo n.º 12
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;
}
Exemplo n.º 13
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;
}