[net-next-2.6.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>
 *
 *  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 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,
	.compat_ioctl = v4l_compat_ioctl32,
	.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 = CX18_INVALID_TASK_HANDLE;

	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;
	}

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

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

	/* 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]);
			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 = 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;
	}

	/* 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) {
		/* 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->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);

	list_for_each(p, &s->q_free.list) {
		struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, 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);
		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);
	}
	/* 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);
		cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
		cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
		/* FIXME - clean-up DSP0_INT mask, i_flags, s_flags, etc. */
		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");
	}

	/* Tell the CX23418 it can't use our buffers anymore */
	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);

	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);

	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;
}
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>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	21	* 02111-1307 USA
	22	*/
	23
	24	#include "cx18-driver.h"
b1526421	25	#include "cx18-io.h"
1c1e45d1 HV	26	#include "cx18-fileops.h"
	27	#include "cx18-mailbox.h"
	28	#include "cx18-i2c.h"
	29	#include "cx18-queue.h"
	30	#include "cx18-ioctl.h"
	31	#include "cx18-streams.h"
	32	#include "cx18-cards.h"
	33	#include "cx18-scb.h"
	34	#include "cx18-av-core.h"
	35	#include "cx18-dvb.h"
	36
	37	#define CX18_DSP0_INTERRUPT_MASK 0xd0004C
	38
	39	static struct file_operations cx18_v4l2_enc_fops = {
daf20d95 HV	40	.owner = THIS_MODULE,
	41	.read = cx18_v4l2_read,
	42	.open = cx18_v4l2_open,
3b6fe58f	43	/* FIXME change to video_ioctl2 if serialization lock can be removed */
daf20d95 HV	44	.ioctl = cx18_v4l2_ioctl,
	45	.compat_ioctl = v4l_compat_ioctl32,
	46	.release = cx18_v4l2_close,
	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;
	60	int minor_offset;
	61	int dma;
	62	enum v4l2_buf_type buf_type;
	63	struct file_operations *fops;
	64	} cx18_stream_info[] = {
	65	{ /* CX18_ENC_STREAM_TYPE_MPG */
	66	"encoder MPEG",
	67	VFL_TYPE_GRABBER, 0,
	68	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	69	&cx18_v4l2_enc_fops
	70	},
	71	{ /* CX18_ENC_STREAM_TYPE_TS */
	72	"TS",
	73	VFL_TYPE_GRABBER, -1,
	74	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	75	&cx18_v4l2_enc_fops
	76	},
	77	{ /* CX18_ENC_STREAM_TYPE_YUV */
	78	"encoder YUV",
	79	VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
	80	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	81	&cx18_v4l2_enc_fops
	82	},
	83	{ /* CX18_ENC_STREAM_TYPE_VBI */
	84	"encoder VBI",
	85	VFL_TYPE_VBI, 0,
	86	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
	87	&cx18_v4l2_enc_fops
	88	},
	89	{ /* CX18_ENC_STREAM_TYPE_PCM */
	90	"encoder PCM audio",
	91	VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
	92	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
	93	&cx18_v4l2_enc_fops
	94	},
	95	{ /* CX18_ENC_STREAM_TYPE_IDX */
	96	"encoder IDX",
	97	VFL_TYPE_GRABBER, -1,
	98	PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	99	&cx18_v4l2_enc_fops
	100	},
	101	{ /* CX18_ENC_STREAM_TYPE_RAD */
	102	"encoder radio",
	103	VFL_TYPE_RADIO, 0,
	104	PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
	105	&cx18_v4l2_enc_fops
	106	},
	107	};
	108
	109	static void cx18_stream_init(struct cx18 *cx, int type)
	110	{
	111	struct cx18_stream *s = &cx->streams[type];
112	struct video_device *dev = s->v4l2dev;
113	u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
114
115	/* we need to keep v4l2dev, so restore it afterwards */
116	memset(s, 0, sizeof(*s));
117	s->v4l2dev = dev;
118
119	/* initialize cx18_stream fields */
120	s->cx = cx;
121	s->type = type;
122	s->name = cx18_stream_info[type].name;
d3c5e707	123	s->handle = CX18_INVALID_TASK_HANDLE;
1c1e45d1 HV	124
	125	s->dma = cx18_stream_info[type].dma;
	126	s->buf_size = cx->stream_buf_size[type];
	127	if (s->buf_size)
	128	s->buffers = max_size / s->buf_size;
	129	if (s->buffers > 63) {
	130	/* Each stream has a maximum of 63 buffers,
	131	ensure we do not exceed that. */
	132	s->buffers = 63;
	133	s->buf_size = (max_size / s->buffers) & ~0xfff;
	134	}
	135	spin_lock_init(&s->qlock);
	136	init_waitqueue_head(&s->waitq);
	137	s->id = -1;
	138	cx18_queue_init(&s->q_free);
	139	cx18_queue_init(&s->q_full);
	140	cx18_queue_init(&s->q_io);
	141	}
	142
	143	static int cx18_prep_dev(struct cx18 *cx, int type)
	144	{
	145	struct cx18_stream *s = &cx->streams[type];
	146	u32 cap = cx->v4l2_cap;
	147	int minor_offset = cx18_stream_info[type].minor_offset;
	148	int minor;
	149
	150	/* These four fields are always initialized. If v4l2dev == NULL, then
	151	this stream is not in use. In that case no other fields but these
	152	four can be used. */
	153	s->v4l2dev = NULL;
	154	s->cx = cx;
	155	s->type = type;
	156	s->name = cx18_stream_info[type].name;
	157
	158	/* Check whether the radio is supported */
	159	if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
	160	return 0;
	161
	162	/* Check whether VBI is supported */
	163	if (type == CX18_ENC_STREAM_TYPE_VBI &&
	164	!(cap & (V4L2_CAP_VBI_CAPTURE \| V4L2_CAP_SLICED_VBI_CAPTURE)))
	165	return 0;
	166
	167	/* card number + user defined offset + device offset */
	168	minor = cx->num + cx18_first_minor + minor_offset;
	169
	170	/* User explicitly selected 0 buffers for these streams, so don't
	171	create them. */
	172	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
	173	cx->options.megabytes[type] == 0) {
	174	CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
	175	return 0;
	176	}
	177
	178	cx18_stream_init(cx, type);
	179
	180	if (minor_offset == -1)
	181	return 0;
	182
	183	/* allocate and initialize the v4l2 video device structure */
	184	s->v4l2dev = video_device_alloc();
	185	if (s->v4l2dev == NULL) {
	186	CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
	187	s->name);
188	return -ENOMEM;
189	}
190
37f89f95 HV	191	snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
37f89f95 HV	192	cx->num);
1c1e45d1 HV	193
1c1e45d1 HV	194	s->v4l2dev->minor = minor;
5e85e732	195	s->v4l2dev->parent = &cx->dev->dev;
1c1e45d1 HV	196	s->v4l2dev->fops = cx18_stream_info[type].fops;
1c1e45d1 HV	197	s->v4l2dev->release = video_device_release;
3b6fe58f AW	198	s->v4l2dev->tvnorms = V4L2_STD_ALL;
3b6fe58f AW	199	cx18_set_funcs(s->v4l2dev);
1c1e45d1 HV	200	return 0;
	201	}
	202
	203	/* Initialize v4l2 variables and register v4l2 devices */
	204	int cx18_streams_setup(struct cx18 *cx)
	205	{
	206	int type;
	207
	208	/* Setup V4L2 Devices */
	209	for (type = 0; type < CX18_MAX_STREAMS; type++) {
	210	/* Prepare device */
	211	if (cx18_prep_dev(cx, type))
	212	break;
	213
	214	/* Allocate Stream */
	215	if (cx18_stream_alloc(&cx->streams[type]))
	216	break;
	217	}
	218	if (type == CX18_MAX_STREAMS)
	219	return 0;
	220
	221	/* One or more streams could not be initialized. Clean 'em all up. */
3f98387e	222	cx18_streams_cleanup(cx, 0);
1c1e45d1 HV	223	return -ENOMEM;
	224	}
	225
	226	static int cx18_reg_dev(struct cx18 *cx, int type)
	227	{
	228	struct cx18_stream *s = &cx->streams[type];
	229	int vfl_type = cx18_stream_info[type].vfl_type;
	230	int minor;
	231
	232	/* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
	233	* We need a VFL_TYPE_TS defined.
	234	*/
	235	if (strcmp("TS", s->name) == 0) {
	236	/* just return if no DVB is supported */
	237	if ((cx->card->hw_all & CX18_HW_DVB) == 0)
	238	return 0;
	239	if (cx18_dvb_register(s) < 0) {
	240	CX18_ERR("DVB failed to register\n");
	241	return -EINVAL;
	242	}
	243	}
	244
	245	if (s->v4l2dev == NULL)
	246	return 0;
	247
	248	minor = s->v4l2dev->minor;
	249
	250	/* Register device. First try the desired minor, then any free one. */
	251	if (video_register_device(s->v4l2dev, vfl_type, minor) &&
	252	video_register_device(s->v4l2dev, vfl_type, -1)) {
	253	CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
	254	s->name, minor);
	255	video_device_release(s->v4l2dev);
	256	s->v4l2dev = NULL;
	257	return -ENOMEM;
	258	}
	259	minor = s->v4l2dev->minor;
	260
	261	switch (vfl_type) {
	262	case VFL_TYPE_GRABBER:
	263	CX18_INFO("Registered device video%d for %s (%d MB)\n",
	264	minor, s->name, cx->options.megabytes[type]);
	265	break;
	266
	267	case VFL_TYPE_RADIO:
	268	CX18_INFO("Registered device radio%d for %s\n",
	269	minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
	270	break;
	271
	272	case VFL_TYPE_VBI:
	273	if (cx->options.megabytes[type])
	274	CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
	275	minor - MINOR_VFL_TYPE_VBI_MIN,
	276	s->name, cx->options.megabytes[type]);
	277	else
	278	CX18_INFO("Registered device vbi%d for %s\n",
	279	minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
	280	break;
	281	}
	282
	283	return 0;
	284	}
	285
	286	/* Register v4l2 devices */
287	int cx18_streams_register(struct cx18 *cx)
288	{
289	int type;
290	int err = 0;
291
292	/* Register V4L2 devices */
293	for (type = 0; type < CX18_MAX_STREAMS; type++)
294	err \|= cx18_reg_dev(cx, type);
295
296	if (err == 0)
297	return 0;
298
299	/* One or more streams could not be initialized. Clean 'em all up. */
3f98387e	300	cx18_streams_cleanup(cx, 1);
1c1e45d1 HV	301	return -ENOMEM;
	302	}
	303
	304	/* Unregister v4l2 devices */
3f98387e	305	void cx18_streams_cleanup(struct cx18 *cx, int unregister)
1c1e45d1 HV	306	{
	307	struct video_device *vdev;
	308	int type;
	309
	310	/* Teardown all streams */
	311	for (type = 0; type < CX18_MAX_STREAMS; type++) {
fac3639d	312	if (cx->streams[type].dvb.enabled) {
1c1e45d1	313	cx18_dvb_unregister(&cx->streams[type]);
fac3639d HV	314	cx->streams[type].dvb.enabled = false;
fac3639d HV	315	}
1c1e45d1 HV	316
	317	vdev = cx->streams[type].v4l2dev;
	318
	319	cx->streams[type].v4l2dev = NULL;
	320	if (vdev == NULL)
	321	continue;
	322
	323	cx18_stream_free(&cx->streams[type]);
	324
3f98387e HV	325	/* Unregister or release device */
	326	if (unregister)
	327	video_unregister_device(vdev);
	328	else
	329	video_device_release(vdev);
1c1e45d1 HV	330	}
	331	}
	332
	333	static void cx18_vbi_setup(struct cx18_stream *s)
	334	{
	335	struct cx18 *cx = s->cx;
	336	int raw = cx->vbi.sliced_in->service_set == 0;
	337	u32 data[CX2341X_MBOX_MAX_DATA];
	338	int lines;
	339
	340	if (cx->is_60hz) {
	341	cx->vbi.count = 12;
	342	cx->vbi.start[0] = 10;
	343	cx->vbi.start[1] = 273;
	344	} else { /* PAL/SECAM */
	345	cx->vbi.count = 18;
	346	cx->vbi.start[0] = 6;
	347	cx->vbi.start[1] = 318;
	348	}
	349
	350	/* setup VBI registers */
	351	cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
	352
	353	/* determine number of lines and total number of VBI bytes.
	354	A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
	355	The '- 1' byte is probably an unused U or V byte. Or something...
	356	A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
	357	header, 42 data bytes + checksum (to be confirmed) */
	358	if (raw) {
	359	lines = cx->vbi.count * 2;
	360	} else {
	361	lines = cx->is_60hz ? 24 : 38;
	362	if (cx->is_60hz)
	363	lines += 2;
	364	}
	365
	366	cx->vbi.enc_size = lines *
	367	(raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
	368
	369	data[0] = s->handle;
	370	/* Lines per field */
	371	data[1] = (lines / 2) \| ((lines / 2) << 16);
	372	/* bytes per line */
	373	data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
	374	/* Every X number of frames a VBI interrupt arrives
	375	(frames as in 25 or 30 fps) */
	376	data[3] = 1;
	377	/* Setup VBI for the cx25840 digitizer */
	378	if (raw) {
	379	data[4] = 0x20602060;
	380	data[5] = 0x30703070;
	381	} else {
	382	data[4] = 0xB0F0B0F0;
	383	data[5] = 0xA0E0A0E0;
	384	}
	385
	386	CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
	387	data[0], data[1], data[2], data[3], data[4], data[5]);
	388
	389	if (s->type == CX18_ENC_STREAM_TYPE_VBI)
	390	cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
	391	}
	392
	393	int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
394	{
395	u32 data[MAX_MB_ARGUMENTS];
396	struct cx18 *cx = s->cx;
397	struct list_head *p;
398	int ts = 0;
399	int captype = 0;
400
401	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
402	return -EINVAL;
403
404	CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
405
406	switch (s->type) {
407	case CX18_ENC_STREAM_TYPE_MPG:
408	captype = CAPTURE_CHANNEL_TYPE_MPEG;
409	cx->mpg_data_received = cx->vbi_data_inserted = 0;
410	cx->dualwatch_jiffies = jiffies;
411	cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
412	cx->search_pack_header = 0;
413	break;
414
415	case CX18_ENC_STREAM_TYPE_TS:
416	captype = CAPTURE_CHANNEL_TYPE_TS;
417	ts = 1;
418	break;
419	case CX18_ENC_STREAM_TYPE_YUV:
420	captype = CAPTURE_CHANNEL_TYPE_YUV;
421	break;
422	case CX18_ENC_STREAM_TYPE_PCM:
423	captype = CAPTURE_CHANNEL_TYPE_PCM;
424	break;
425	case CX18_ENC_STREAM_TYPE_VBI:
426	captype = cx->vbi.sliced_in->service_set ?
427	CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
428	cx->vbi.frame = 0;
429	cx->vbi.inserted_frame = 0;
430	memset(cx->vbi.sliced_mpeg_size,
431	0, sizeof(cx->vbi.sliced_mpeg_size));
432	break;
433	default:
434	return -EINVAL;
435	}
1c1e45d1 HV	436
	437	/* mute/unmute video */
	438	cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
	439	s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
	440
	441	/* Clear Streamoff flags in case left from last capture */
	442	clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
	443
	444	cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
	445	s->handle = data[0];
	446	cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
	447
31554ae5	448	if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
1c1e45d1 HV	449	/* Stuff from Windows, we don't know what it is */
	450	cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
	451	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
	452	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
	453	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
	454	cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
	455
	456	cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
	457	s->handle, cx->digitizer, cx->digitizer);
	458
	459	/* Setup VBI */
	460	if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
	461	cx18_vbi_setup(s);
	462
	463	/* assign program index info.
	464	Mask 7: select I/P/B, Num_req: 400 max */
	465	cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
	466
	467	/* Setup API for Stream */
	468	cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
	469	}
	470
31554ae5	471	if (atomic_read(&cx->tot_capturing) == 0) {
1c1e45d1	472	clear_bit(CX18_F_I_EOS, &cx->i_flags);
b1526421	473	cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
1c1e45d1 HV	474	}
	475
	476	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
990c81c8 AV	477	(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
990c81c8 AV	478	(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
1c1e45d1 HV	479
	480	list_for_each(p, &s->q_free.list) {
	481	struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
	482
b1526421 AW	483	cx18_writel(cx, buf->dma_handle,
	484	&cx->scb->cpu_mdl[buf->id].paddr);
	485	cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
1c1e45d1	486	cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
990c81c8 AV	487	(void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
990c81c8 AV	488	1, buf->id, s->buf_size);
1c1e45d1 HV	489	}
	490	/* begin_capture */
	491	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
	492	CX18_DEBUG_WARN("Error starting capture!\n");
3b5df8ea AW	493	/* Ensure we're really not capturing before releasing MDLs */
	494	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
	495	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
	496	else
	497	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
	498	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1c1e45d1	499	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
3b5df8ea	500	/* FIXME - clean-up DSP0_INT mask, i_flags, s_flags, etc. */
1c1e45d1 HV	501	return -EINVAL;
	502	}
	503
	504	/* you're live! sit back and await interrupts :) */
31554ae5 HV	505	if (!ts)
	506	atomic_inc(&cx->ana_capturing);
	507	atomic_inc(&cx->tot_capturing);
1c1e45d1 HV	508	return 0;
	509	}
	510
	511	void cx18_stop_all_captures(struct cx18 *cx)
	512	{
	513	int i;
	514
	515	for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
	516	struct cx18_stream *s = &cx->streams[i];
	517
	518	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
	519	continue;
	520	if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
	521	cx18_stop_v4l2_encode_stream(s, 0);
	522	}
	523	}
	524
	525	int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
	526	{
	527	struct cx18 *cx = s->cx;
	528	unsigned long then;
	529
	530	if (s->v4l2dev == NULL && s->dvb.enabled == 0)
	531	return -EINVAL;
	532
	533	/* This function assumes that you are allowed to stop the capture
	534	and that we are actually capturing */
	535
	536	CX18_DEBUG_INFO("Stop Capture\n");
	537
31554ae5	538	if (atomic_read(&cx->tot_capturing) == 0)
1c1e45d1 HV	539	return 0;
	540
	541	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
	542	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
	543	else
	544	cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
	545
	546	then = jiffies;
	547
	548	if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
	549	CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
	550	}
	551
3b5df8ea AW	552	/* Tell the CX23418 it can't use our buffers anymore */
	553	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
	554
31554ae5 HV	555	if (s->type != CX18_ENC_STREAM_TYPE_TS)
	556	atomic_dec(&cx->ana_capturing);
	557	atomic_dec(&cx->tot_capturing);
1c1e45d1 HV	558
	559	/* Clear capture and no-read bits */
	560	clear_bit(CX18_F_S_STREAMING, &s->s_flags);
	561
	562	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
d3c5e707	563	s->handle = CX18_INVALID_TASK_HANDLE;
1c1e45d1	564
31554ae5	565	if (atomic_read(&cx->tot_capturing) > 0)
1c1e45d1 HV	566	return 0;
1c1e45d1 HV	567
b1526421	568	cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1c1e45d1 HV	569	wake_up(&s->waitq);
	570
	571	return 0;
	572	}
	573
	574	u32 cx18_find_handle(struct cx18 *cx)
	575	{
	576	int i;
	577
	578	/* find first available handle to be used for global settings */
	579	for (i = 0; i < CX18_MAX_STREAMS; i++) {
	580	struct cx18_stream *s = &cx->streams[i];
	581
d3c5e707	582	if (s->v4l2dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1c1e45d1 HV	583	return s->handle;
1c1e45d1 HV	584	}
d3c5e707	585	return CX18_INVALID_TASK_HANDLE;
1c1e45d1	586	}