drivers/media/video/cx18/cx18-streams.c - kernel/msm-4.19 - Gitiles

 /*
  *  cx18 init/start/stop/exit stream functions
  *
  *  Derived from ivtv-streams.c
  *
  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
  *
  *  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-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 file_operations cx18_v4l2_enc_fops = {
       .owner = THIS_MODULE,
       .read = cx18_v4l2_read,
       .open = cx18_v4l2_open,
       .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 minor_offset;
 	int dma;
 	enum v4l2_buf_type buf_type;
 	struct file_operations *fops;
 } cx18_stream_info[] = {
 	{	/* CX18_ENC_STREAM_TYPE_MPG */
 		"encoder MPEG",
 		VFL_TYPE_GRABBER, 0,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_TS */
 		"TS",
 		VFL_TYPE_GRABBER, -1,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_YUV */
 		"encoder YUV",
 		VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_VBI */
 		"encoder VBI",
 		VFL_TYPE_VBI, 0,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_PCM */
 		"encoder PCM audio",
 		VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_IDX */
 		"encoder IDX",
 		VFL_TYPE_GRABBER, -1,
 		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
 		&cx18_v4l2_enc_fops
 	},
 	{	/* CX18_ENC_STREAM_TYPE_RAD */
 		"encoder radio",
 		VFL_TYPE_RADIO, 0,
 		PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
 		&cx18_v4l2_enc_fops
 	},
 };

 static void cx18_stream_init(struct cx18 *cx, int type)
 {
 	struct cx18_stream *s = &cx->streams[type];
 	struct video_device *dev = s->v4l2dev;
 	u32 max_size = cx->options.megabytes[type] * 1024 * 1024;

 	/* 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 = 0xffffffff;

 	s->dma = cx18_stream_info[type].dma;
 	s->buf_size = cx->stream_buf_size[type];
 	if (s->buf_size)
 		s->buffers = max_size / s->buf_size;
 	if (s->buffers > 63) {
 		/* Each stream has a maximum of 63 buffers,
 		   ensure we do not exceed that. */
 		s->buffers = 63;
 		s->buf_size = (max_size / s->buffers) & ~0xfff;
 	}
 	spin_lock_init(&s->qlock);
 	init_waitqueue_head(&s->waitq);
 	s->id = -1;
 	cx18_queue_init(&s->q_free);
 	cx18_queue_init(&s->q_full);
 	cx18_queue_init(&s->q_io);
 }

 static int cx18_prep_dev(struct cx18 *cx, int type)
 {
 	struct cx18_stream *s = &cx->streams[type];
 	u32 cap = cx->v4l2_cap;
 	int minor_offset = cx18_stream_info[type].minor_offset;
 	int minor;

 	/* 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;

 	/* card number + user defined offset + device offset */
 	minor = cx->num + cx18_first_minor + minor_offset;

 	/* User explicitly selected 0 buffers for these streams, so don't
 	   create them. */
 	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 	    cx->options.megabytes[type] == 0) {
 		CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 		return 0;
 	}

 	cx18_stream_init(cx, type);

 	if (minor_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;
 	}

 	s->v4l2dev->type =
 		VID_TYPE_CAPTURE | VID_TYPE_TUNER | VID_TYPE_TELETEXT |
 		VID_TYPE_CLIPPING | VID_TYPE_SCALES | VID_TYPE_MPEG_ENCODER;
 	snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18%d %s",
 			cx->num, s->name);

 	s->v4l2dev->minor = minor;
 	s->v4l2dev->dev = &cx->dev->dev;
 	s->v4l2dev->fops = cx18_stream_info[type].fops;
 	s->v4l2dev->release = video_device_release;

 	return 0;
 }

 /* Initialize v4l2 variables and register v4l2 devices */
 int cx18_streams_setup(struct cx18 *cx)
 {
 	int type;

 	/* Setup V4L2 Devices */
 	for (type = 0; type < CX18_MAX_STREAMS; type++) {
 		/* Prepare device */
 		if (cx18_prep_dev(cx, type))
 			break;

 		/* Allocate Stream */
 		if (cx18_stream_alloc(&cx->streams[type]))
 			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 -ENOMEM;
 }

 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 minor;

 	/* 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;
 		if (cx18_dvb_register(s) < 0) {
 			CX18_ERR("DVB failed to register\n");
 			return -EINVAL;
 		}
 	}

 	if (s->v4l2dev == NULL)
 		return 0;

 	minor = s->v4l2dev->minor;

 	/* Register device. First try the desired minor, then any free one. */
 	if (video_register_device(s->v4l2dev, vfl_type, minor) &&
 			video_register_device(s->v4l2dev, vfl_type, -1)) {
 		CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
 			s->name, minor);
 		video_device_release(s->v4l2dev);
 		s->v4l2dev = NULL;
 		return -ENOMEM;
 	}
 	minor = s->v4l2dev->minor;

 	switch (vfl_type) {
 	case VFL_TYPE_GRABBER:
 		CX18_INFO("Registered device video%d for %s (%d MB)\n",
 			minor, s->name, cx->options.megabytes[type]);
 		break;

 	case VFL_TYPE_RADIO:
 		CX18_INFO("Registered device radio%d for %s\n",
 			minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
 		break;

 	case VFL_TYPE_VBI:
 		if (cx->options.megabytes[type])
 			CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
 				minor - MINOR_VFL_TYPE_VBI_MIN,
 				s->name, cx->options.megabytes[type]);
 		else
 			CX18_INFO("Registered device vbi%d for %s\n",
 				minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
 		break;
 	}

 	return 0;
 }

 /* Register v4l2 devices */
 int cx18_streams_register(struct cx18 *cx)
 {
 	int type;
 	int err = 0;

 	/* Register V4L2 devices */
 	for (type = 0; type < CX18_MAX_STREAMS; type++)
 		err |= cx18_reg_dev(cx, type);

 	if (err == 0)
 		return 0;

 	/* One or more streams could not be initialized. Clean 'em all up. */
 	cx18_streams_cleanup(cx, 1);
 	return -ENOMEM;
 }

 /* 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]);

 		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 = cx->vbi.sliced_in->service_set == 0;
 	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 1443 bytes: 2 * 720 + 4 byte frame header - 1
 	   The '- 1' byte is probably an unused U or V byte. Or something...
 	   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_size : cx->vbi.sliced_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] = 0x30703070;
 	} 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);
 }

 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 {
 	u32 data[MAX_MB_ARGUMENTS];
 	struct cx18 *cx = s->cx;
 	struct list_head *p;
 	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 = cx->vbi.sliced_in->service_set ?
 		    CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_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;
 	}
 	s->buffers_stolen = 0;

 	/* 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->capturing) == 0 && !ts) {
 		/* 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 */
 		cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
 	}

 	if (atomic_read(&cx->capturing) == 0) {
 		clear_bit(CX18_F_I_EOS, &cx->i_flags);
 		write_reg(7, CX18_DSP0_INTERRUPT_MASK);
 	}

 	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 		(void *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 		(void *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);

 	list_for_each(p, &s->q_free.list) {
 		struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);

 		writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
 		writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
 		cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 			(void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, 1,
 			buf->id, s->buf_size);
 	}
 	/* begin_capture */
 	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 		CX18_DEBUG_WARN("Error starting capture!\n");
 		cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 		return -EINVAL;
 	}

 	/* you're live! sit back and await interrupts :) */
 	atomic_inc(&cx->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->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");
 	}

 	atomic_dec(&cx->capturing);

 	/* Clear capture and no-read bits */
 	clear_bit(CX18_F_S_STREAMING, &s->s_flags);

 	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 	s->handle = 0xffffffff;

 	if (atomic_read(&cx->capturing) > 0)
 		return 0;

 	write_reg(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)
 			return s->handle;
 	}
 	return 0;
 }
	/*
	* cx18 init/start/stop/exit stream functions
	*
	* Derived from ivtv-streams.c
	*
	* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
	*
	* 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-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 file_operations cx18_v4l2_enc_fops = {
	.owner = THIS_MODULE,
	.read = cx18_v4l2_read,
	.open = cx18_v4l2_open,
	.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 minor_offset;
	int dma;
	enum v4l2_buf_type buf_type;
	struct file_operations *fops;
	} cx18_stream_info[] = {
	{ /* CX18_ENC_STREAM_TYPE_MPG */
	"encoder MPEG",
	VFL_TYPE_GRABBER, 0,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_TS */
	"TS",
	VFL_TYPE_GRABBER, -1,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_YUV */
	"encoder YUV",
	VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_VBI */
	"encoder VBI",
	VFL_TYPE_VBI, 0,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_PCM */
	"encoder PCM audio",
	VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_IDX */
	"encoder IDX",
	VFL_TYPE_GRABBER, -1,
	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	&cx18_v4l2_enc_fops
	},
	{ /* CX18_ENC_STREAM_TYPE_RAD */
	"encoder radio",
	VFL_TYPE_RADIO, 0,
	PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
	&cx18_v4l2_enc_fops
	},
	};

	static void cx18_stream_init(struct cx18 *cx, int type)
	{
	struct cx18_stream *s = &cx->streams[type];
	struct video_device *dev = s->v4l2dev;
	u32 max_size = cx->options.megabytes[type] * 1024 * 1024;

	/* 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 = 0xffffffff;

	s->dma = cx18_stream_info[type].dma;
	s->buf_size = cx->stream_buf_size[type];
	if (s->buf_size)
	s->buffers = max_size / s->buf_size;
	if (s->buffers > 63) {
	/* Each stream has a maximum of 63 buffers,
	ensure we do not exceed that. */
	s->buffers = 63;
	s->buf_size = (max_size / s->buffers) & ~0xfff;
	}
	spin_lock_init(&s->qlock);
	init_waitqueue_head(&s->waitq);
	s->id = -1;
	cx18_queue_init(&s->q_free);
	cx18_queue_init(&s->q_full);
	cx18_queue_init(&s->q_io);
	}

	static int cx18_prep_dev(struct cx18 *cx, int type)
	{
	struct cx18_stream *s = &cx->streams[type];
	u32 cap = cx->v4l2_cap;
	int minor_offset = cx18_stream_info[type].minor_offset;
	int minor;

	/* 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;

	/* card number + user defined offset + device offset */
	minor = cx->num + cx18_first_minor + minor_offset;

	/* User explicitly selected 0 buffers for these streams, so don't
	create them. */
	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
	cx->options.megabytes[type] == 0) {
	CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
	return 0;
	}

	cx18_stream_init(cx, type);

	if (minor_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;
	}

	s->v4l2dev->type =
	VID_TYPE_CAPTURE \| VID_TYPE_TUNER \| VID_TYPE_TELETEXT \|
	VID_TYPE_CLIPPING \| VID_TYPE_SCALES \| VID_TYPE_MPEG_ENCODER;
	snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18%d %s",
	cx->num, s->name);

	s->v4l2dev->minor = minor;
	s->v4l2dev->dev = &cx->dev->dev;
	s->v4l2dev->fops = cx18_stream_info[type].fops;
	s->v4l2dev->release = video_device_release;

	return 0;
	}

	/* Initialize v4l2 variables and register v4l2 devices */
	int cx18_streams_setup(struct cx18 *cx)
	{
	int type;

	/* Setup V4L2 Devices */
	for (type = 0; type < CX18_MAX_STREAMS; type++) {
	/* Prepare device */
	if (cx18_prep_dev(cx, type))
	break;

	/* Allocate Stream */
	if (cx18_stream_alloc(&cx->streams[type]))
	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 -ENOMEM;
	}

	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 minor;

	/* 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;
	if (cx18_dvb_register(s) < 0) {
	CX18_ERR("DVB failed to register\n");
	return -EINVAL;
	}
	}

	if (s->v4l2dev == NULL)
	return 0;

	minor = s->v4l2dev->minor;

	/* Register device. First try the desired minor, then any free one. */
	if (video_register_device(s->v4l2dev, vfl_type, minor) &&
	video_register_device(s->v4l2dev, vfl_type, -1)) {
	CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
	s->name, minor);
	video_device_release(s->v4l2dev);
	s->v4l2dev = NULL;
	return -ENOMEM;
	}
	minor = s->v4l2dev->minor;

	switch (vfl_type) {
	case VFL_TYPE_GRABBER:
	CX18_INFO("Registered device video%d for %s (%d MB)\n",
	minor, s->name, cx->options.megabytes[type]);
	break;

	case VFL_TYPE_RADIO:
	CX18_INFO("Registered device radio%d for %s\n",
	minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
	break;

	case VFL_TYPE_VBI:
	if (cx->options.megabytes[type])
	CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
	minor - MINOR_VFL_TYPE_VBI_MIN,
	s->name, cx->options.megabytes[type]);
	else
	CX18_INFO("Registered device vbi%d for %s\n",
	minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
	break;
	}

	return 0;
	}

	/* Register v4l2 devices */
	int cx18_streams_register(struct cx18 *cx)
	{
	int type;
	int err = 0;

	/* Register V4L2 devices */
	for (type = 0; type < CX18_MAX_STREAMS; type++)
	err \|= cx18_reg_dev(cx, type);

	if (err == 0)
	return 0;

	/* One or more streams could not be initialized. Clean 'em all up. */
	cx18_streams_cleanup(cx, 1);
	return -ENOMEM;
	}

	/* 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]);

	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 = cx->vbi.sliced_in->service_set == 0;
	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 1443 bytes: 2 * 720 + 4 byte frame header - 1
	The '- 1' byte is probably an unused U or V byte. Or something...
	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_size : cx->vbi.sliced_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] = 0x30703070;
	} 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);
	}

	int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
	{
	u32 data[MAX_MB_ARGUMENTS];
	struct cx18 *cx = s->cx;
	struct list_head *p;
	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 = cx->vbi.sliced_in->service_set ?
	CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_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;
	}
	s->buffers_stolen = 0;

	/* 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->capturing) == 0 && !ts) {
	/* 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 */
	cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
	}

	if (atomic_read(&cx->capturing) == 0) {
	clear_bit(CX18_F_I_EOS, &cx->i_flags);
	write_reg(7, CX18_DSP0_INTERRUPT_MASK);
	}

	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
	(void *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
	(void *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);

	list_for_each(p, &s->q_free.list) {
	struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);

	writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
	writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
	cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
	(void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, 1,
	buf->id, s->buf_size);
	}
	/* begin_capture */
	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
	CX18_DEBUG_WARN("Error starting capture!\n");
	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
	return -EINVAL;
	}

	/* you're live! sit back and await interrupts :) */
	atomic_inc(&cx->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->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");
	}

	atomic_dec(&cx->capturing);

	/* Clear capture and no-read bits */
	clear_bit(CX18_F_S_STREAMING, &s->s_flags);

	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
	s->handle = 0xffffffff;

	if (atomic_read(&cx->capturing) > 0)
	return 0;

	write_reg(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)
	return s->handle;
	}
	return 0;
	}