[mirror_ubuntu-bionic-kernel.git] / drivers / media / video / cx18 / cx18-streams.c

/*
 *  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-av-core.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 *dev = s->v4l2dev;

	/* we need to keep v4l2dev, so restore it afterwards */
	memset(s, 0, sizeof(*s));
	s->v4l2dev = 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];

	mutex_init(&s->qlock);
	init_waitqueue_head(&s->waitq);
	s->id = -1;
	cx18_queue_init(&s->q_free);
	cx18_queue_init(&s->q_busy);
	cx18_queue_init(&s->q_full);
}

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->num + cx18_first_minor + num_offset;

	/* These four fields are always initialized. If v4l2dev == NULL, then
	   this stream is not in use. In that case no other fields but these
	   four can be used. */
	s->v4l2dev = 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->v4l2dev = video_device_alloc();
	if (s->v4l2dev == NULL) {
		CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
				s->name);
		return -ENOMEM;
	}

	snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
			cx->num);

	s->v4l2dev->num = num;
	s->v4l2dev->parent = &cx->dev->dev;
	s->v4l2dev->fops = &cx18_v4l2_enc_fops;
	s->v4l2dev->release = video_device_release;
	s->v4l2dev->tvnorms = V4L2_STD_ALL;
	cx18_set_funcs(s->v4l2dev);
	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->v4l2dev == NULL)
		return 0;

	num = s->v4l2dev->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->v4l2dev)
			num = s_mpg->v4l2dev->num + cx18_stream_info[type].num_offset;
	}

	/* Register device. First try the desired minor, then any free one. */
	ret = video_register_device(s->v4l2dev, vfl_type, num);
	if (ret < 0) {
		CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
			s->name, num);
		video_device_release(s->v4l2dev);
		s->v4l2dev = NULL;
		return ret;
	}
	num = s->v4l2dev->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].v4l2dev;

		cx->streams[type].v4l2dev = 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 */
	cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);

	/* determine number of lines and total number of VBI bytes.
	   A raw line takes 1444 bytes: 4 byte SAV code + 2 * 720
	   A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
	   header, 42 data bytes + checksum (to be confirmed) */
	if (raw) {
		lines = cx->vbi.count * 2;
	} else {
		lines = cx->is_60hz ? 24 : 38;
		if (cx->is_60hz)
			lines += 2;
	}

	cx->vbi.enc_size = lines *
		(raw ? cx->vbi.raw_size : cx->vbi.sliced_size);

	data[0] = s->handle;
	/* Lines per field */
	data[1] = (lines / 2) | ((lines / 2) << 16);
	/* bytes per line */
	data[2] = (raw ? cx->vbi.raw_decoder_line_size
		       : cx->vbi.sliced_decoder_line_size);
	/* Every X number of frames a VBI interrupt arrives
	   (frames as in 25 or 30 fps) */
	data[3] = 1;
	/* Setup VBI for the cx25840 digitizer */
	if (raw) {
		data[4] = 0x20602060;
		data[5] = 0x307090d0;
	} else {
		data[4] = 0xB0F0B0F0;
		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]);

	if (s->type == CX18_ENC_STREAM_TYPE_VBI)
		cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
}

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_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;
}

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);
}

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 ts = 0;
	int captype = 0;

	if (s->v4l2dev == 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;
		ts = 1;
		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:
		captype = cx18_raw_vbi(cx) ?
		     CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
		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;
	}

	/* mute/unmute video */
	cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
		  s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));

	/* 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);

	if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
		struct cx18_api_func_private priv;

		/* Stuff from Windows, we don't know what it is */
		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);
		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);

		cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
			       s->handle, cx->digitizer, cx->digitizer);

		/* Setup VBI */
		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 */
		cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);

		/* Setup API for Stream */
		priv.cx = cx;
		priv.s = s;
		cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
	}

	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);
	mutex_lock(&s->qlock);
	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);
	}
	mutex_unlock(&s->qlock);
	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 */
		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;
		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 (!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->v4l2dev == 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->v4l2dev == 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;

	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;

	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->v4l2dev && (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->v4l2dev || s->dvb.enabled)
			return s;
	}
	return NULL;
}
Commit	Line	Data
1c1e45d1 HV	1	/*
	2	* cx18 init/start/stop/exit stream functions
	3	*
	4	* Derived from ivtv-streams.c
	5	*
	6	* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
1ed9dcc8	7	* Copyright (C) 2008 Andy Walls <awalls@radix.net>
1c1e45d1 HV	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	22	* 02111-1307 USA
	23	*/
	24
	25	#include "cx18-driver.h"
b1526421	26	#include "cx18-io.h"
1c1e45d1 HV	27	#include "cx18-fileops.h"
	28	#include "cx18-mailbox.h"
	29	#include "cx18-i2c.h"
	30	#include "cx18-queue.h"
	31	#include "cx18-ioctl.h"
	32	#include "cx18-streams.h"
	33	#include "cx18-cards.h"
	34	#include "cx18-scb.h"
	35	#include "cx18-av-core.h"
	36	#include "cx18-dvb.h"
	37
	38	#define CX18_DSP0_INTERRUPT_MASK 0xd0004C
	39
bec43661	40	static struct v4l2_file_operations cx18_v4l2_enc_fops = {
daf20d95 HV	41	.owner = THIS_MODULE,
	42	.read = cx18_v4l2_read,
	43	.open = cx18_v4l2_open,
3b6fe58f	44	/* FIXME change to video_ioctl2 if serialization lock can be removed */
daf20d95	45	.ioctl = cx18_v4l2_ioctl,
daf20d95 HV	46	.release = cx18_v4l2_close,
daf20d95 HV	47	.poll = cx18_v4l2_enc_poll,
1c1e45d1 HV	48	};
	49
	50	/* offset from 0 to register ts v4l2 minors on */
	51	#define CX18_V4L2_ENC_TS_OFFSET 16
	52	/* offset from 0 to register pcm v4l2 minors on */
	53	#define CX18_V4L2_ENC_PCM_OFFSET 24
	54	/* offset from 0 to register yuv v4l2 minors on */
	55	#define CX18_V4L2_ENC_YUV_OFFSET 32
	56
	57	static struct {
	58	const char *name;
	59	int vfl_type;
dd89601d	60	int num_offset;
1c1e45d1 HV	61	int dma;
1c1e45d1 HV	62	enum v4l2_buf_type buf_type;
1c1e45d1 HV	63	} cx18_stream_info[] = {
	64	{ /* CX18_ENC_STREAM_TYPE_MPG */
	65	"encoder MPEG",
	66	VFL_TYPE_GRABBER, 0,
	67	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
1c1e45d1 HV	68	},
	69	{ /* CX18_ENC_STREAM_TYPE_TS */
	70	"TS",
	71	VFL_TYPE_GRABBER, -1,
	72	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
1c1e45d1 HV	73	},
	74	{ /* CX18_ENC_STREAM_TYPE_YUV */
	75	"encoder YUV",
	76	VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
	77	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
1c1e45d1 HV	78	},
	79	{ /* CX18_ENC_STREAM_TYPE_VBI */
	80	"encoder VBI",
	81	VFL_TYPE_VBI, 0,
	82	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
1c1e45d1 HV	83	},
	84	{ /* CX18_ENC_STREAM_TYPE_PCM */
	85	"encoder PCM audio",
	86	VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
	87	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
1c1e45d1 HV	88	},
	89	{ /* CX18_ENC_STREAM_TYPE_IDX */
	90	"encoder IDX",
	91	VFL_TYPE_GRABBER, -1,
	92	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
1c1e45d1 HV	93	},
	94	{ /* CX18_ENC_STREAM_TYPE_RAD */
	95	"encoder radio",
	96	VFL_TYPE_RADIO, 0,
	97	PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
1c1e45d1 HV	98	},
	99	};
	100
	101	static void cx18_stream_init(struct cx18 *cx, int type)
	102	{
	103	struct cx18_stream *s = &cx->streams[type];
	104	struct video_device *dev = s->v4l2dev;
1c1e45d1 HV	105
	106	/* we need to keep v4l2dev, so restore it afterwards */
	107	memset(s, 0, sizeof(*s));
	108	s->v4l2dev = dev;
	109
	110	/* initialize cx18_stream fields */
	111	s->cx = cx;
	112	s->type = type;
	113	s->name = cx18_stream_info[type].name;
d3c5e707	114	s->handle = CX18_INVALID_TASK_HANDLE;
1c1e45d1 HV	115
1c1e45d1 HV	116	s->dma = cx18_stream_info[type].dma;
6ecd86dc	117	s->buffers = cx->stream_buffers[type];
1c1e45d1	118	s->buf_size = cx->stream_buf_size[type];
6ecd86dc	119
f576ceef	120	mutex_init(&s->qlock);
1c1e45d1 HV	121	init_waitqueue_head(&s->waitq);
	122	s->id = -1;
	123	cx18_queue_init(&s->q_free);
66c2a6b0	124	cx18_queue_init(&s->q_busy);
1c1e45d1	125	cx18_queue_init(&s->q_full);
1c1e45d1 HV	126	}
	127
	128	static int cx18_prep_dev(struct cx18 *cx, int type)
	129	{
	130	struct cx18_stream *s = &cx->streams[type];
	131	u32 cap = cx->v4l2_cap;
dd89601d HV	132	int num_offset = cx18_stream_info[type].num_offset;
dd89601d HV	133	int num = cx->num + cx18_first_minor + num_offset;
1c1e45d1 HV	134
	135	/* These four fields are always initialized. If v4l2dev == NULL, then
	136	this stream is not in use. In that case no other fields but these
	137	four can be used. */
	138	s->v4l2dev = NULL;
	139	s->cx = cx;
	140	s->type = type;
	141	s->name = cx18_stream_info[type].name;
	142
	143	/* Check whether the radio is supported */
	144	if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
	145	return 0;
	146
	147	/* Check whether VBI is supported */
	148	if (type == CX18_ENC_STREAM_TYPE_VBI &&
	149	!(cap & (V4L2_CAP_VBI_CAPTURE \| V4L2_CAP_SLICED_VBI_CAPTURE)))
	150	return 0;
	151
1c1e45d1 HV	152	/* User explicitly selected 0 buffers for these streams, so don't
	153	create them. */
	154	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
6ecd86dc	155	cx->stream_buffers[type] == 0) {
1c1e45d1 HV	156	CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
	157	return 0;
	158	}
	159
	160	cx18_stream_init(cx, type);
	161
dd89601d	162	if (num_offset == -1)
1c1e45d1 HV	163	return 0;
	164
	165	/* allocate and initialize the v4l2 video device structure */
	166	s->v4l2dev = video_device_alloc();
	167	if (s->v4l2dev == NULL) {
	168	CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
	169	s->name);
	170	return -ENOMEM;
	171	}
	172
37f89f95 HV	173	snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
37f89f95 HV	174	cx->num);
1c1e45d1	175
dd89601d	176	s->v4l2dev->num = num;
5e85e732	177	s->v4l2dev->parent = &cx->dev->dev;
bec43661	178	s->v4l2dev->fops = &cx18_v4l2_enc_fops;
1c1e45d1	179	s->v4l2dev->release = video_device_release;
3b6fe58f AW	180	s->v4l2dev->tvnorms = V4L2_STD_ALL;
3b6fe58f AW	181	cx18_set_funcs(s->v4l2dev);
1c1e45d1 HV	182	return 0;
	183	}
	184
	185	/* Initialize v4l2 variables and register v4l2 devices */
	186	int cx18_streams_setup(struct cx18 *cx)
	187	{
9b4a7c8a	188	int type, ret;
1c1e45d1 HV	189
	190	/* Setup V4L2 Devices */
	191	for (type = 0; type < CX18_MAX_STREAMS; type++) {
	192	/* Prepare device */
9b4a7c8a AW	193	ret = cx18_prep_dev(cx, type);
9b4a7c8a AW	194	if (ret < 0)
1c1e45d1 HV	195	break;
	196
	197	/* Allocate Stream */
9b4a7c8a AW	198	ret = cx18_stream_alloc(&cx->streams[type]);
9b4a7c8a AW	199	if (ret < 0)
1c1e45d1 HV	200	break;
	201	}
	202	if (type == CX18_MAX_STREAMS)
	203	return 0;
	204
	205	/* One or more streams could not be initialized. Clean 'em all up. */
3f98387e	206	cx18_streams_cleanup(cx, 0);
9b4a7c8a	207	return ret;
1c1e45d1 HV	208	}
	209
	210	static int cx18_reg_dev(struct cx18 *cx, int type)
	211	{
	212	struct cx18_stream *s = &cx->streams[type];
	213	int vfl_type = cx18_stream_info[type].vfl_type;
9b4a7c8a	214	int num, ret;
1c1e45d1 HV	215
	216	/* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
	217	* We need a VFL_TYPE_TS defined.
	218	*/
	219	if (strcmp("TS", s->name) == 0) {
	220	/* just return if no DVB is supported */
	221	if ((cx->card->hw_all & CX18_HW_DVB) == 0)
	222	return 0;
9b4a7c8a AW	223	ret = cx18_dvb_register(s);
9b4a7c8a AW	224	if (ret < 0) {
1c1e45d1	225	CX18_ERR("DVB failed to register\n");
9b4a7c8a	226	return ret;
1c1e45d1 HV	227	}
	228	}
	229
	230	if (s->v4l2dev == NULL)
	231	return 0;
	232
dd89601d HV	233	num = s->v4l2dev->num;
	234	/* card number + user defined offset + device offset */
	235	if (type != CX18_ENC_STREAM_TYPE_MPG) {
	236	struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
	237
	238	if (s_mpg->v4l2dev)
	239	num = s_mpg->v4l2dev->num + cx18_stream_info[type].num_offset;
	240	}
1c1e45d1 HV	241
1c1e45d1 HV	242	/* Register device. First try the desired minor, then any free one. */
9b4a7c8a AW	243	ret = video_register_device(s->v4l2dev, vfl_type, num);
9b4a7c8a AW	244	if (ret < 0) {
dd89601d HV	245	CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
dd89601d HV	246	s->name, num);
1c1e45d1 HV	247	video_device_release(s->v4l2dev);
1c1e45d1 HV	248	s->v4l2dev = NULL;
9b4a7c8a	249	return ret;
1c1e45d1	250	}
dd89601d	251	num = s->v4l2dev->num;
1c1e45d1 HV	252
	253	switch (vfl_type) {
	254	case VFL_TYPE_GRABBER:
6ecd86dc AW	255	CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
	256	num, s->name, cx->stream_buffers[type],
	257	cx->stream_buf_size[type]/1024);
1c1e45d1 HV	258	break;
	259
	260	case VFL_TYPE_RADIO:
	261	CX18_INFO("Registered device radio%d for %s\n",
dd89601d	262	num, s->name);
1c1e45d1 HV	263	break;
	264
	265	case VFL_TYPE_VBI:
6ecd86dc AW	266	if (cx->stream_buffers[type])
	267	CX18_INFO("Registered device vbi%d for %s "
	268	"(%d x %d bytes)\n",
	269	num, s->name, cx->stream_buffers[type],
	270	cx->stream_buf_size[type]);
1c1e45d1 HV	271	else
1c1e45d1 HV	272	CX18_INFO("Registered device vbi%d for %s\n",
dd89601d	273	num, s->name);
1c1e45d1 HV	274	break;
	275	}
	276
	277	return 0;
	278	}
	279
	280	/* Register v4l2 devices */
	281	int cx18_streams_register(struct cx18 *cx)
	282	{
	283	int type;
9b4a7c8a AW	284	int err;
9b4a7c8a AW	285	int ret = 0;
1c1e45d1 HV	286
1c1e45d1 HV	287	/* Register V4L2 devices */
9b4a7c8a AW	288	for (type = 0; type < CX18_MAX_STREAMS; type++) {
	289	err = cx18_reg_dev(cx, type);
	290	if (err && ret == 0)
	291	ret = err;
	292	}
1c1e45d1	293
9b4a7c8a	294	if (ret == 0)
1c1e45d1 HV	295	return 0;
	296
	297	/* One or more streams could not be initialized. Clean 'em all up. */
3f98387e	298	cx18_streams_cleanup(cx, 1);
9b4a7c8a	299	return ret;
1c1e45d1 HV	300	}
	301
	302	/* Unregister v4l2 devices */
3f98387e	303	void cx18_streams_cleanup(struct cx18 *cx, int unregister)
1c1e45d1 HV	304	{
	305	struct video_device *vdev;
	306	int type;
	307
	308	/* Teardown all streams */
	309	for (type = 0; type < CX18_MAX_STREAMS; type++) {
fac3639d	310	if (cx->streams[type].dvb.enabled) {
1c1e45d1	311	cx18_dvb_unregister(&cx->streams[type]);
fac3639d HV	312	cx->streams[type].dvb.enabled = false;
fac3639d HV	313	}
1c1e45d1 HV	314
	315	vdev = cx->streams[type].v4l2dev;
	316
	317	cx->streams[type].v4l2dev = NULL;
	318	if (vdev == NULL)
	319	continue;
	320
	321	cx18_stream_free(&cx->streams[type]);
	322
3f98387e HV	323	/* Unregister or release device */
	324	if (unregister)
	325	video_unregister_device(vdev);
	326	else
	327	video_device_release(vdev);
1c1e45d1 HV	328	}
	329	}
	330
	331	static void cx18_vbi_setup(struct cx18_stream *s)
	332	{
	333	struct cx18 *cx = s->cx;
dd073434	334	int raw = cx18_raw_vbi(cx);
1c1e45d1 HV	335	u32 data[CX2341X_MBOX_MAX_DATA];
	336	int lines;
	337
	338	if (cx->is_60hz) {
	339	cx->vbi.count = 12;
	340	cx->vbi.start[0] = 10;
	341	cx->vbi.start[1] = 273;
	342	} else { /* PAL/SECAM */
	343	cx->vbi.count = 18;
	344	cx->vbi.start[0] = 6;
	345	cx->vbi.start[1] = 318;
	346	}
	347
	348	/* setup VBI registers */
	349	cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
	350
	351	/* determine number of lines and total number of VBI bytes.
af009cf6	352	A raw line takes 1444 bytes: 4 byte SAV code + 2 * 720
1c1e45d1 HV	353	A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
	354	header, 42 data bytes + checksum (to be confirmed) */
	355	if (raw) {
	356	lines = cx->vbi.count * 2;
	357	} else {
	358	lines = cx->is_60hz ? 24 : 38;
	359	if (cx->is_60hz)
	360	lines += 2;
	361	}
	362
	363	cx->vbi.enc_size = lines *
	364	(raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
	365
	366	data[0] = s->handle;
	367	/* Lines per field */
	368	data[1] = (lines / 2) \| ((lines / 2) << 16);
	369	/* bytes per line */
af009cf6 AW	370	data[2] = (raw ? cx->vbi.raw_decoder_line_size
af009cf6 AW	371	: cx->vbi.sliced_decoder_line_size);
1c1e45d1 HV	372	/* Every X number of frames a VBI interrupt arrives
	373	(frames as in 25 or 30 fps) */
	374	data[3] = 1;
	375	/* Setup VBI for the cx25840 digitizer */
	376	if (raw) {
	377	data[4] = 0x20602060;
af009cf6	378	data[5] = 0x307090d0;
1c1e45d1 HV	379	} else {
	380	data[4] = 0xB0F0B0F0;
	381	data[5] = 0xA0E0A0E0;
	382	}
	383
	384	CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
	385	data[0], data[1], data[2], data[3], data[4], data[5]);
	386
	387	if (s->type == CX18_ENC_STREAM_TYPE_VBI)
	388	cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
	389	}
	390
66c2a6b0 AW	391	struct cx18_queue cx18_stream_put_buf_fw(struct cx18_stream s,
	392	struct cx18_buffer *buf)
	393	{
	394	struct cx18 *cx = s->cx;
	395	struct cx18_queue *q;
	396
	397	/* Don't give it to the firmware, if we're not running a capture */
	398	if (s->handle == CX18_INVALID_TASK_HANDLE \|\|
	399	!test_bit(CX18_F_S_STREAMING, &s->s_flags))
	400	return cx18_enqueue(s, buf, &s->q_free);
	401
	402	q = cx18_enqueue(s, buf, &s->q_busy);
	403	if (q != &s->q_busy)
	404	return q; /* The firmware has the max buffers it can handle */
	405
	406	cx18_buf_sync_for_device(s, buf);
	407	cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
	408	(void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
	409	1, buf->id, s->buf_size);
	410	return q;
	411	}
	412
abb096de	413	void cx18_stream_load_fw_queue(struct cx18_stream *s)
66c2a6b0	414	{
abb096de	415	struct cx18_queue *q;
66c2a6b0	416	struct cx18_buffer *buf;
66c2a6b0	417
abb096de	418	if (atomic_read(&s->q_free.buffers) == 0 \|\|
0ef02892	419	atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
abb096de AW	420	return;
	421
	422	/* Move from q_free to q_busy notifying the firmware, until the limit */
	423	do {
	424	buf = cx18_dequeue(s, &s->q_free);
	425	if (buf == NULL)
	426	break;
	427	q = cx18_stream_put_buf_fw(s, buf);
0ef02892 AW	428	} while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
0ef02892 AW	429	&& q == &s->q_busy);
66c2a6b0 AW	430	}
66c2a6b0 AW	431
1c1e45d1 HV	432	int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
	433	{
	434	u32 data[MAX_MB_ARGUMENTS];
	435	struct cx18 *cx = s->cx;
66c2a6b0	436	struct cx18_buffer *buf;
1c1e45d1 HV	437	int ts = 0;
	438	int captype = 0;
	439
	440	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
	441	return -EINVAL;
	442
	443	CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
	444
	445	switch (s->type) {
	446	case CX18_ENC_STREAM_TYPE_MPG:
	447	captype = CAPTURE_CHANNEL_TYPE_MPEG;
	448	cx->mpg_data_received = cx->vbi_data_inserted = 0;
	449	cx->dualwatch_jiffies = jiffies;
	450	cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
	451	cx->search_pack_header = 0;
	452	break;
	453
	454	case CX18_ENC_STREAM_TYPE_TS:
	455	captype = CAPTURE_CHANNEL_TYPE_TS;
	456	ts = 1;
	457	break;
	458	case CX18_ENC_STREAM_TYPE_YUV:
	459	captype = CAPTURE_CHANNEL_TYPE_YUV;
	460	break;
	461	case CX18_ENC_STREAM_TYPE_PCM:
	462	captype = CAPTURE_CHANNEL_TYPE_PCM;
	463	break;
	464	case CX18_ENC_STREAM_TYPE_VBI:
dd073434 AW	465	captype = cx18_raw_vbi(cx) ?
dd073434 AW	466	CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
1c1e45d1 HV	467	cx->vbi.frame = 0;
	468	cx->vbi.inserted_frame = 0;
	469	memset(cx->vbi.sliced_mpeg_size,
	470	0, sizeof(cx->vbi.sliced_mpeg_size));
	471	break;
	472	default:
	473	return -EINVAL;
	474	}
1c1e45d1 HV	475
	476	/* mute/unmute video */
	477	cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
	478	s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
	479
	480	/* Clear Streamoff flags in case left from last capture */
	481	clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
	482
	483	cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
	484	s->handle = data[0];
	485	cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
	486
31554ae5	487	if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
50b86bac AW	488	struct cx18_api_func_private priv;
50b86bac AW	489
1c1e45d1 HV	490	/* Stuff from Windows, we don't know what it is */
	491	cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
	492	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
	493	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
	494	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
	495	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
	496
	497	cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
	498	s->handle, cx->digitizer, cx->digitizer);
	499
	500	/* Setup VBI */
	501	if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
	502	cx18_vbi_setup(s);
	503
	504	/* assign program index info.
	505	Mask 7: select I/P/B, Num_req: 400 max */
	506	cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
	507
	508	/* Setup API for Stream */
50b86bac AW	509	priv.cx = cx;
	510	priv.s = s;
	511	cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
1c1e45d1 HV	512	}
1c1e45d1 HV	513
31554ae5	514	if (atomic_read(&cx->tot_capturing) == 0) {
1c1e45d1	515	clear_bit(CX18_F_I_EOS, &cx->i_flags);
b1526421	516	cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
1c1e45d1 HV	517	}
	518
	519	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
990c81c8 AV	520	(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
990c81c8 AV	521	(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
1c1e45d1	522
66c2a6b0 AW	523	/* Init all the cpu_mdls for this stream */
	524	cx18_flush_queues(s);
	525	mutex_lock(&s->qlock);
f6b181ac	526	list_for_each_entry(buf, &s->q_free.list, list) {
b1526421 AW	527	cx18_writel(cx, buf->dma_handle,
	528	&cx->scb->cpu_mdl[buf->id].paddr);
	529	cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
1c1e45d1	530	}
66c2a6b0	531	mutex_unlock(&s->qlock);
abb096de	532	cx18_stream_load_fw_queue(s);
66c2a6b0	533
1c1e45d1 HV	534	/* begin_capture */
	535	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
	536	CX18_DEBUG_WARN("Error starting capture!\n");
3b5df8ea AW	537	/* Ensure we're really not capturing before releasing MDLs */
	538	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
	539	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
	540	else
	541	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
66c2a6b0 AW	542	clear_bit(CX18_F_S_STREAMING, &s->s_flags);
66c2a6b0 AW	543	/* FIXME - CX18_F_S_STREAMOFF as well? */
3b5df8ea	544	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1c1e45d1	545	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
66c2a6b0 AW	546	s->handle = CX18_INVALID_TASK_HANDLE;
	547	if (atomic_read(&cx->tot_capturing) == 0) {
	548	set_bit(CX18_F_I_EOS, &cx->i_flags);
	549	cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
	550	}
1c1e45d1 HV	551	return -EINVAL;
	552	}
	553
	554	/* you're live! sit back and await interrupts :) */
31554ae5 HV	555	if (!ts)
	556	atomic_inc(&cx->ana_capturing);
	557	atomic_inc(&cx->tot_capturing);
1c1e45d1 HV	558	return 0;
	559	}
	560
	561	void cx18_stop_all_captures(struct cx18 *cx)
	562	{
	563	int i;
	564
	565	for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
	566	struct cx18_stream *s = &cx->streams[i];
	567
	568	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
	569	continue;
	570	if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
	571	cx18_stop_v4l2_encode_stream(s, 0);
	572	}
	573	}
	574
	575	int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
	576	{
	577	struct cx18 *cx = s->cx;
	578	unsigned long then;
	579
	580	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
	581	return -EINVAL;
	582
	583	/* This function assumes that you are allowed to stop the capture
	584	and that we are actually capturing */
	585
	586	CX18_DEBUG_INFO("Stop Capture\n");
	587
31554ae5	588	if (atomic_read(&cx->tot_capturing) == 0)
1c1e45d1 HV	589	return 0;
	590
	591	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
	592	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
	593	else
	594	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
	595
	596	then = jiffies;
	597
	598	if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
	599	CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
	600	}
	601
31554ae5 HV	602	if (s->type != CX18_ENC_STREAM_TYPE_TS)
	603	atomic_dec(&cx->ana_capturing);
	604	atomic_dec(&cx->tot_capturing);
1c1e45d1 HV	605
	606	/* Clear capture and no-read bits */
	607	clear_bit(CX18_F_S_STREAMING, &s->s_flags);
	608
f68d0cf5 AW	609	/* Tell the CX23418 it can't use our buffers anymore */
	610	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
	611
1c1e45d1	612	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
d3c5e707	613	s->handle = CX18_INVALID_TASK_HANDLE;
1c1e45d1	614
31554ae5	615	if (atomic_read(&cx->tot_capturing) > 0)
1c1e45d1 HV	616	return 0;
1c1e45d1 HV	617
b1526421	618	cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1c1e45d1 HV	619	wake_up(&s->waitq);
	620
	621	return 0;
	622	}
	623
	624	u32 cx18_find_handle(struct cx18 *cx)
	625	{
	626	int i;
	627
	628	/* find first available handle to be used for global settings */
	629	for (i = 0; i < CX18_MAX_STREAMS; i++) {
	630	struct cx18_stream *s = &cx->streams[i];
	631
d3c5e707	632	if (s->v4l2dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1c1e45d1 HV	633	return s->handle;
1c1e45d1 HV	634	}
d3c5e707	635	return CX18_INVALID_TASK_HANDLE;
1c1e45d1	636	}
ee2d64f5 AW	637
	638	struct cx18_stream cx18_handle_to_stream(struct cx18 cx, u32 handle)
	639	{
	640	int i;
	641	struct cx18_stream *s;
	642
	643	if (handle == CX18_INVALID_TASK_HANDLE)
	644	return NULL;
	645
	646	for (i = 0; i < CX18_MAX_STREAMS; i++) {
	647	s = &cx->streams[i];
	648	if (s->handle != handle)
	649	continue;
	650	if (s->v4l2dev \|\| s->dvb.enabled)
	651	return s;
	652	}
	653	return NULL;
	654	}