path: root/drivers/media/video/ivtv/ivtv-streams.c

/*
    init/start/stop/exit stream functions
    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
    Copyright (C) 2004  Chris Kennedy <c@groovy.org>
    Copyright (C) 2005-2007  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
 */

/* License: GPL
 * Author: Kevin Thayer <nufan_wfk at yahoo dot com>
 *
 * This file will hold API related functions, both internal (firmware api)
 * and external (v4l2, etc)
 *
 * -----
 * MPG600/MPG160 support by  T.Adachi <tadachi@tadachi-net.com>
 *                      and Takeru KOMORIYA<komoriya@paken.org>
 *
 * AVerMedia M179 GPIO info by Chris Pinkham <cpinkham@bc2va.org>
 *                using information provided by Jiun-Kuei Jung @ AVerMedia.
 */

#include "ivtv-driver.h"
#include "ivtv-fileops.h"
#include "ivtv-i2c.h"
#include "ivtv-queue.h"
#include "ivtv-mailbox.h"
#include "ivtv-audio.h"
#include "ivtv-video.h"
#include "ivtv-vbi.h"
#include "ivtv-ioctl.h"
#include "ivtv-irq.h"
#include "ivtv-streams.h"
#include "ivtv-cards.h"

static struct file_operations ivtv_v4l2_enc_fops = {
      .owner = THIS_MODULE,
      .read = ivtv_v4l2_read,
      .write = ivtv_v4l2_write,
      .open = ivtv_v4l2_open,
      .ioctl = ivtv_v4l2_ioctl,
      .release = ivtv_v4l2_close,
      .poll = ivtv_v4l2_enc_poll,
};

static struct file_operations ivtv_v4l2_dec_fops = {
      .owner = THIS_MODULE,
      .read = ivtv_v4l2_read,
      .write = ivtv_v4l2_write,
      .open = ivtv_v4l2_open,
      .ioctl = ivtv_v4l2_ioctl,
      .release = ivtv_v4l2_close,
      .poll = ivtv_v4l2_dec_poll,
};

static struct {
	const char *name;
	int vfl_type;
	int minor_offset;
	int dma, pio;
	enum v4l2_buf_type buf_type;
	struct file_operations *fops;
} ivtv_stream_info[] = {
	{	/* IVTV_ENC_STREAM_TYPE_MPG */
		"encoder MPEG",
		VFL_TYPE_GRABBER, 0,
		PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VIDEO_CAPTURE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_ENC_STREAM_TYPE_YUV */
		"encoder YUV",
		VFL_TYPE_GRABBER, IVTV_V4L2_ENC_YUV_OFFSET,
		PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VIDEO_CAPTURE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_ENC_STREAM_TYPE_VBI */
		"encoder VBI",
		VFL_TYPE_VBI, 0,
		PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VBI_CAPTURE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_ENC_STREAM_TYPE_PCM */
		"encoder PCM audio",
		VFL_TYPE_GRABBER, IVTV_V4L2_ENC_PCM_OFFSET,
		PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_PRIVATE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_ENC_STREAM_TYPE_RAD */
		"encoder radio",
		VFL_TYPE_RADIO, 0,
		PCI_DMA_NONE, 1, V4L2_BUF_TYPE_PRIVATE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_DEC_STREAM_TYPE_MPG */
		"decoder MPEG",
		VFL_TYPE_GRABBER, IVTV_V4L2_DEC_MPG_OFFSET,
		PCI_DMA_TODEVICE, 0, V4L2_BUF_TYPE_VIDEO_OUTPUT,
		&ivtv_v4l2_dec_fops
	},
	{	/* IVTV_DEC_STREAM_TYPE_VBI */
		"decoder VBI",
		VFL_TYPE_VBI, IVTV_V4L2_DEC_VBI_OFFSET,
		PCI_DMA_NONE, 1, V4L2_BUF_TYPE_VBI_CAPTURE,
		&ivtv_v4l2_enc_fops
	},
	{	/* IVTV_DEC_STREAM_TYPE_VOUT */
		"decoder VOUT",
		VFL_TYPE_VBI, IVTV_V4L2_DEC_VOUT_OFFSET,
		PCI_DMA_NONE, 1, V4L2_BUF_TYPE_VBI_OUTPUT,
		&ivtv_v4l2_dec_fops
	},
	{	/* IVTV_DEC_STREAM_TYPE_YUV */
		"decoder YUV",
		VFL_TYPE_GRABBER, IVTV_V4L2_DEC_YUV_OFFSET,
		PCI_DMA_TODEVICE, 0, V4L2_BUF_TYPE_VIDEO_OUTPUT,
		&ivtv_v4l2_dec_fops
	}
};

static void ivtv_stream_init(struct ivtv *itv, int type)
{
	struct ivtv_stream *s = &itv->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 ivtv_stream fields */
	s->itv = itv;
	s->type = type;
	s->name = ivtv_stream_info[type].name;

	if (ivtv_stream_info[type].pio)
		s->dma = PCI_DMA_NONE;
	else
		s->dma = ivtv_stream_info[type].dma;
	s->buf_size = itv->stream_buf_size[type];
	if (s->buf_size)
		s->buffers = itv->options.megabytes[type] * 1024 * 1024 / s->buf_size;
	spin_lock_init(&s->qlock);
	init_waitqueue_head(&s->waitq);
	s->id = -1;
	s->SG_handle = IVTV_DMA_UNMAPPED;
	ivtv_queue_init(&s->q_free);
	ivtv_queue_init(&s->q_full);
	ivtv_queue_init(&s->q_dma);
	ivtv_queue_init(&s->q_predma);
	ivtv_queue_init(&s->q_io);
}

static int ivtv_reg_dev(struct ivtv *itv, int type