drivers/media/video/cx23885/cx23885-video.c

/*
 *  Driver for the Conexant CX23885 PCIe bridge
 *
 *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kmod.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <asm/div64.h>

#include "cx23885.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include "cx23885-ioctl.h"

MODULE_DESCRIPTION("v4l2 driver module for cx23885 based TV cards");
MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
MODULE_LICENSE("GPL");

/* ------------------------------------------------------------------ */

static unsigned int video_nr[] = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };
static unsigned int vbi_nr[]   = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };
static unsigned int radio_nr[] = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };

module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr,   int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);

MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");

static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

static unsigned int irq_debug;
module_param(irq_debug, int, 0644);
MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");

static unsigned int vid_limit = 16;
module_param(vid_limit, int, 0644);
MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");

#define dprintk(level, fmt, arg...)\
	do { if (video_debug >= level)\
		printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	} while (0)

/* ------------------------------------------------------------------- */
/* static data                                                         */

#define FORMAT_FLAGS_PACKED       0x01

static struct cx23885_fmt formats[] = {
	{
		.name     = "8 bpp, gray",
		.fourcc   = V4L2_PIX_FMT_GREY,
		.depth    = 8,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "15 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_RGB555,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "15 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB555X,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "16 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_RGB565,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "16 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB565X,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "24 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_BGR24,
		.depth    = 24,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "32 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_BGR32,
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "32 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB32,
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "4:2:2, packed, YUYV",
		.fourcc   = V4L2_PIX_FMT_YUYV,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "4:2:2, packed, UYVY",
		.fourcc   = V4L2_PIX_FMT_UYVY,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},
};

static struct cx23885_fmt *format_by_fourcc(unsigned int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(formats); i++)
		if (formats[i].fourcc == fourcc)
			return formats+i;

	printk(KERN_ERR "%s(0x%08x) NOT FOUND\n", __func__, fourcc);
	return NULL;
}

/* ------------------------------------------------------------------- */

static const struct v4l2_queryctrl no_ctl = {
	.name  = "42",
	.flags = V4L2_CTRL_FLAG_DISABLED,
};

static struct cx23885_ctrl cx23885_ctls[] = {
	/* --- video --- */
	{
		.v = {
			.id            = V4L2_CID_BRIGHTNESS,
			.name          = "Brightness",
			.minimum       = 0x00,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 128,
		.reg                   = LUMA_CTRL,
		.mask                  = 0x00ff,
		.shift                 = 0,
	}, {
		.v = {
			.id            = V4L2_CID_CONTRAST,
			.name          = "Contrast",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x3f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 0,
		.reg                   = LUMA_CTRL,
		.mask                  = 0xff00,
		.shift                 = 8,
	}, {
		.v = {
			.id            = V4L2_CID_HUE,
			.name          = "Hue",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 128,
		.reg                   = CHROMA_CTRL,
		.mask                  = 0xff0000,
		.shift                 = 16,
	}, {
		/* strictly, this only describes only U saturation.
		 * V saturation is handled specially through code.
		 */
		.v = {
			.id            = V4L2_CID_SATURATION,
			.name          = "Saturation",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 0,
		.reg                   = CHROMA_CTRL,
		.mask                  = 0x00ff,
		.shift                 = 0,
	}, {
	/* --- audio --- */
		.v = {
			.id            = V4L2_CID_AUDIO_MUTE,
			.name          = "Mute",
			.minimum       = 0,
			.maximum       = 1,
			.default_value = 1,
			.type          = V4L2_CTRL_TYPE_BOOLEAN,
		},
		.reg                   = PATH1_CTL1,
		.mask                  = (0x1f << 24),
		.shift                 = 24,
	}, {
		.v = {
			.id            = V4L2_CID_AUDIO_VOLUME,
			.name          = "Volume",
			.minimum       = 0,
			.maximum       = 0x3f,
			.step          = 1,
			.default_value = 0x3f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.reg                   = PATH1_VOL_CTL,
		.mask                  = 0xff,
		.shift                 = 0,
	}
};
static const int CX23885_CTLS = ARRAY_SIZE(cx23885_ctls);

/* Must be sorted from low to high control ID! */
static const u32 cx23885_user_ctrls[] = {
	V4L2_CID_USER_CLASS,
	V4L2_CID_BRIGHTNESS,
	V4L2_CID_CONTRAST,
	V4L2_CID_SATURATION,
	V4L2_CID_HUE,
	V4L2_CID_AUDIO_VOLUME,
	V4L2_CID_AUDIO_MUTE,
	0
};

static const u32 *ctrl_classes[] = {
	cx23885_user_ctrls,
	NULL
};

static void cx23885_video_wakeup(struct cx23885_dev *dev,
		 struct cx23885_dmaqueue *q, u32 count)
{
	struct cx23885_buffer *buf;
	int bc;

	for (bc = 0;; bc++) {
		if (list_empty(&q->active))
			break;
		buf = list_entry(q->active.next,
				 struct cx23885_buffer, vb.queue);

		/* count comes from the hw and is is 16bit wide --
		 * this trick handles wrap-arounds correctly for
		 * up to 32767 buffers in flight... */
		if ((s16) (count - buf->count) < 0)
			break;

		do_gettimeofday(&buf->vb.ts);
		dprintk(2, "[%p/%d] wakeup reg=%d buf=%d\n", buf, buf->vb.i,
			count, buf->count);
		buf->vb.state = VIDEOBUF_DONE;
		list_del(&buf->vb.queue);
		wake_up(&buf->vb.done);
	}
	if (list_empty(&q->active))
		del_timer(&q->timeout);
	else
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	if (bc != 1)
		printk(KERN_ERR "%s: %d buffers handled (should be 1)\n",
			__func__, bc);
}

static int cx23885_set_tvnorm(struct cx23885_dev *dev, v4l2_std_id norm)
{
	dprintk(1, "%s(norm = 0x%08x) name: [%s]\n",
		__func__,
		(unsigned int)norm,
		v4l2_norm_to_name(norm));

	dev->tvnorm = norm;

	call_all(dev, core, s_std, norm);

	return 0;
}

static struct video_device *cx23885_vdev_init(struct cx23885_dev *dev,
				    struct pci_dev *pci,
				    struct video_device *template,
				    char *type)
{
	struct video_device *vfd;
	dprintk(1, "%s()\n", __func__);

	vfd = video_device_alloc();
	if (NULL == vfd)
		return NULL;
	*vfd = *template;
	vfd->minor = -1;
	vfd->v4l2_dev = &dev->v4l2_dev;
	vfd->release = video_device_release;
	snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)",
		 dev->name, type, cx23885_boards[dev->board].name);
	return vfd;
}

static int cx23885_ctrl_query(struct v4l2_queryctrl *qctrl)
{
	int i;

	if (qctrl->id < V4L2_CID_BASE ||
	    qctrl->id >= V4L2_CID_LASTP1)
		return -EINVAL;
	for (i = 0; i < CX23885_CTLS; i++)
		if (cx23885_ctls[i].v.id == qctrl->id)
			break;
	if (i == CX23885_CTLS) {
		*qctrl = no_ctl;
		return 0;
	}
	*qctrl = cx23885_ctls[i].v;
	return 0;
}

/* ------------------------------------------------------------------- */
/* resource management                                                 */

static int res_get(struct cx23885_dev *dev, struct cx23885_fh *fh,
	unsigned int bit)
{
	dprintk(1, "%s()\n", __func__);
	if (fh->resources & bit)
		/* have it already allocated */
		return 1;

	/* is it free? */
	mutex_lock(&dev->lock);
	if (dev->resources & bit) {
		/* no, someone else uses it */
		mutex_unlock(&dev->lock);
		return 0;
	}
	/* it's free, grab it */
	fh->resources  |= bit;
	dev->resources |= bit;
	dprintk(1, "res: get %d\n", bit);
	mutex_unlock(&dev->lock);
	return 1;
}

static int res_check(struct cx23885_fh *fh, unsigned int bit)
{
	return fh->resources & bit;
}

static int res_locked(struct cx23885_dev *dev, unsigned int bit)
{
	return dev->resources & bit;
}

static void res_free(struct cx23885_dev *dev, struct cx23885_fh *fh,
	unsigned int bits)
{
	BUG_ON((fh->resources & bits) != bits);
	dprintk(1, "%s()\n", __func__);

	mutex_lock(&dev->lock);
	fh->resources  &= ~bits;
	dev->resources &= ~bits;
	dprintk(1, "res: put %d\n", bits);
	mutex_unlock(&dev->lock);
}

static int cx23885_video_mux(struct cx23885_dev *dev, unsigned int input)
{
	dprintk(1, "%s() video_mux: %d [vmux=%d, gpio=0x%x,0x%x,0x%x,0x%x]\n",
		__func__,
		input, INPUT(input)->vmux,
		INPUT(input)->gpio0, INPUT(input)->gpio1,
		INPUT(input)->gpio2, INPUT(input)->gpio3);
	dev->input = input;

	/* Tell the internal A/V decoder */
	v4l2_subdev_call(dev->sd_cx25840, video, s_routing,
			INPUT(input)->vmux, 0, 0);

	return 0;
}

/* ------------------------------------------------------------------ */
static int cx23885_set_scale(struct cx23885_dev *dev, unsigned int width,
	unsigned int height, enum v4l2_field field)
{
	dprintk(1, "%s()\n", __func__);
	return 0;
}

static int cx23885_start_video_dma(struct cx23885_dev *dev,
			   struct cx23885_dmaqueue *q,
			   struct cx23885_buffer *buf)
{
	dprintk(1, "%s()\n", __func__);

	/* setup fifo + format */
	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH01],
				buf->bpl, buf->risc.dma);
	cx23885_set_scale(dev, buf->vb.width, buf->vb.height, buf->vb.field);

	/* reset counter */
	cx_write(VID_A_GPCNT_CTL, 3);
	q->count = 1;

	/* enable irq */
	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
	cx_set(VID_A_INT_MSK, 0x000011);

	/* start dma */
	cx_set(DEV_CNTRL2, (1<<5));
	cx_set(VID_A_DMA_CTL, 0x11); /* FIFO and RISC enable */

	return 0;
}


static int cx23885_restart_video_queue(struct cx23885_dev *dev,
			       struct cx23885_dmaqueue *q)
{
	struct cx23885_buffer *buf, *prev;
	struct list_head *item;
	dprintk(1, "%s()\n", __func__);

	if (!list_empty(&q->active)) {
		buf = list_entry(q->active.next, struct cx23885_buffer,
			vb.queue);
		dprintk(2, "restart_queue [%p/%d]: restart dma\n",
			buf, buf->vb.i);
		cx23885_start_video_dma(dev, q, buf);
		list_for_each(item, &q->active) {
			buf = list_entry(item, struct cx23885_buffer,
				vb.queue);
			buf->count    = q->count++;
		}
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		return 0;
	}

	prev = NULL;
	for (;;) {
		if (list_empty(&q->queued))
			return 0;
		buf = list_entry(q->queued.next, struct cx23885_buffer,
			vb.queue);
		if (NULL == prev) {
			list_move_tail(&buf->vb.queue, &q->active);
			cx23885_start_video_dma(dev, q, buf);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
			dprintk(2, "[%p/%d] restart_queue - first active\n",
				buf, buf->vb.i);

		} else if (prev->vb.width  == buf->vb.width  &&
			   prev->vb.height == buf->vb.height &&
			   prev->fmt       == buf->fmt) {
			list_move_tail(&buf->vb.queue, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63 - 32 */
			dprintk(2, "[%p/%d] restart_queue - move to active\n",
				buf, buf->vb.i);
		} else {
			return 0;
		}
		prev = buf;
	}
}

static int buffer_setup(struct videobuf_queue *q, unsigned int *count,
	unsigned int *size)
{
	struct cx23885_fh *fh = q->priv_data;

	*size = fh->fmt->depth*fh->width*fh->height >> 3;
	if (0 == *count)
		*count = 32;
	while (*size * *count > vid_limit * 1024 * 1024)
		(*count)--;
	return 0;
}

static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
	       enum v4l2_field field)
{
	struct cx23885_fh *fh  = q->priv_data;
	struct cx23885_dev *dev = fh->dev;
	struct cx23885_buffer *buf =
		container_of(vb, struct cx23885_buffer, vb);
	int rc, init_buffer = 0;
	u32 line0_offset, line1_offset;
	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);

	BUG_ON(NULL == fh->fmt);
	if (fh->width  < 48 || fh->width  > norm_maxw(dev->tvnorm) ||
	    fh->height < 32 || fh->height > norm_maxh(dev->tvnorm))
		return -EINVAL;
	buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
		return -EINVAL;

	if (buf->fmt       != fh->fmt    ||
	    buf->vb.width  != fh->width  ||
	    buf->vb.height != fh->height ||
	    buf->vb.field  != field) {
		buf->fmt       = fh->fmt;
		buf->vb.width  = fh->width;
		buf->vb.height = fh->height;
		buf->vb.field  = field;
		init_buffer = 1;
	}

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		init_buffer = 1;
		rc = videobuf_iolock(q, &buf->vb, NULL);
		if (0 != rc)
			goto fail;
	}

	if (init_buffer) {
		buf->bpl = buf->vb.width * buf->fmt->depth >> 3;
		switch (buf->vb.field) {
		case V4L2_FIELD_TOP:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist, 0, UNSET,
					 buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_BOTTOM:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist, UNSET, 0,
					 buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_INTERLACED:
			if (dev->tvnorm & V4L2_STD_NTSC) {
				/* cx25840 transmits NTSC bottom field first */
				dprintk(1, "%s() Creating NTSC risc\n",
					__func__);
				line0_offset = buf->bpl;
				line1_offset = 0;
			} else {
				/* All other formats are top field first */
				dprintk(1, "%s() Creating PAL/SECAM risc\n",
					__func__);
				line0_offset = 0;
				line1_offset = buf->bpl;
			}
			cx23885_risc_buffer(dev->pci, &buf->risc,
					dma->sglist, line0_offset,
					line1_offset,
					buf->bpl, buf->bpl,
					buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_TB:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist,
					 0, buf->bpl * (buf->vb.height >> 1),
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_BT:
			cx23885_risc_buffer(dev->pci, &buf->risc,
					 dma->sglist,
					 buf->bpl * (buf->vb.height >> 1), 0,
					 buf->bpl, 0,
					 buf->vb.height >> 1);
			break;
		default:
			BUG();
		}
	}
	dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
		buf, buf->vb.i,
		fh->width, fh->height, fh->fmt->depth, fh->fmt->name,
		(unsigned long)buf->risc.dma);

	buf->vb.state = VIDEOBUF_PREPARED;
	return 0;

 fail:
	cx23885_free_buffer(q, buf);
	return rc;
}

static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct cx23885_buffer   *buf = container_of(vb,
		struct cx23885_buffer, vb);
	struct cx23885_buffer   *prev;
	struct cx23885_fh       *fh   = vq->priv_data;
	struct cx23885_dev      *dev  = fh->dev;
	struct cx23885_dmaqueue *q    = &dev->vidq;

	/* add jump to stopper */
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */

	if (!list_empty(&q->queued)) {
		list_add_tail(&buf->vb.queue, &q->queued);
		buf->vb.state = VIDEOBUF_QUEUED;
		dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
			buf, buf->vb.i);

	} else if (list_empty(&q->active)) {
		list_add_tail(&buf->vb.queue, &q->active);
		cx23885_start_video_dma(dev, q, buf);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buf->count    = q->count++;
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(2, "[%p/%d] buffer_queue - first active\n",
			buf, buf->vb.i);

	} else {
		prev = list_entry(q->active.prev, struct cx23885_buffer,
			vb.queue);
		if (prev->vb.width  == buf->vb.width  &&
		    prev->vb.height == buf->vb.height &&
		    prev->fmt       == buf->fmt) {
			list_add_tail(&buf->vb.queue, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count    = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			/* 64 bit bits 63-32 */
			prev->risc.jmp[2] = cpu_to_le32(0);
			dprintk(2, "[%p/%d] buffer_queue - append to active\n",
				buf, buf->vb.i);

		} else {
			list_add_tail(&buf->vb.queue, &q->queued);
			buf->vb.state = VIDEOBUF_QUEUED;
			dprintk(2, "[%p/%d] buffer_queue - first queued\n",
				buf, buf->vb.i);
		}
	}
}

static void buffer_release(struct videobuf_queue *q,
	struct videobuf_buffer *vb)
{
	struct cx23885_buffer *buf = container_of(vb,
		struct cx23885_buffer, vb);

	cx23885_free_buffer(q, buf);
}

static struct videobuf_queue_ops cx23885_video_qops = {
	.buf_setup    = buffer_setup,
	.buf_prepare  = buffer_prepare,
	.buf_queue    = buffer_queue,
	.buf_release  = buffer_release,
};

static struct videobuf_queue *get_queue(struct cx23885_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &fh->vidq;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return &fh->vbiq;
	default:
		BUG();
		return NULL;
	}
}

static int get_resource(struct cx23885_fh *fh)
{
	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return RESOURCE_VIDEO;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return RESOURCE_VBI;
	default:
		BUG();
		return 0;
	}
}

static int video_open(struct file *file)
{
	int minor = video_devdata(file)->minor;
	struct cx23885_dev *h, *dev = NULL;
	struct cx23885_fh *fh;
	struct list_head *list;
	enum v4l2_buf_type type = 0;
	int radio = 0;

	lock_kernel();
	list_for_each(list, &cx23885_devlist) {
		h = list_entry(list, struct cx23885_dev, devlist);
		if (h->video_dev &&
		    h->video_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		}
		if (h->vbi_dev &&
		    h->vbi_dev->minor == minor) {
			dev  = h;
			type = V4L2_BUF_TYPE_VBI_CAPTURE;
		}
		if (h->radio_dev &&
		    h->radio_dev->minor == minor) {
			radio = 1;
			dev   = h;
		}
	}
	if (NULL == dev) {
		unlock_kernel();
		return -ENODEV;
	}

	dprintk(1, "open minor=%d radio=%d type=%s\n",
		minor, radio, v4l2_type_names[type]);

	/* allocate + initialize per filehandle data */
	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
	if (NULL == fh) {
		unlock_kernel();
		return -ENOMEM;
	}
	file->private_data = fh;
	fh->dev      = dev;
	fh->radio    = radio;
	fh->type     = type;
	fh->width    = 320;
	fh->height   = 240;
	fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_BGR24);

	videobuf_queue_sg_init(&fh->vidq, &cx23885_video_qops,
			    &dev->pci->dev, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_INTERLACED,
			    sizeof(struct cx23885_buffer),
			    fh);

	dprintk(1, "post videobuf_queue_init()\n");

	unlock_kernel();

	return 0;
}

static ssize_t video_read(struct file *file, char __user *data,
	size_t count, loff_t *ppos)
{
	struct cx23885_fh *fh = file->private_data;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (res_locked(fh->dev, RESOURCE_VIDEO))
			return -EBUSY;
		return videobuf_read_one(&fh->vidq, data, count, ppos,
					 file->f_flags & O_NONBLOCK);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (!res_get(fh->dev, fh, RESOURCE_VBI))
			return -EBUSY;
		return videobuf_read_stream(&fh->vbiq, data, count, ppos, 1,
					    file->f_flags & O_NONBLOCK);
	default:
		BUG();
		return 0;
	}
}

static unsigned int video_poll(struct file *file,
	struct poll_table_struct *wait)
{
	struct cx23885_fh *fh = file->private_data;
	struct cx23885_buffer *buf;
	unsigned int rc = POLLERR;

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
		if (!res_get(fh->dev, fh, RESOURCE_VBI))
			return POLLERR;
		return videobuf_poll_stream(file, &fh->vbiq, wait);
	}

	mutex_lock(&fh->vidq.vb_lock);
	if (res_check(fh, RESOURCE_VIDEO)) {
		/* streaming capture */
		if (list_empty(&fh->vidq.stream))
			goto done;
		buf = list_entry(fh->vidq.stream.next,
			struct cx23885_buffer, vb.stream);
	} else {
		/* read() capture */
		buf = (struct cx23885_buffer *)fh->vidq.read_buf;
		if (NULL == buf)
			goto done;
	}
	poll_wait(file, &buf->vb.done, wait);
	if (buf->vb.state == VIDEOBUF_DONE ||
	    buf->vb.state == VIDEOBUF_ERROR)
		rc =  POLLIN|POLLRDNORM;
	else
		rc = 0;
done:
	mutex_unlock(&fh->vidq.vb_lock);
	return rc;
}

static int video_release(struct file *file)
{
	struct cx23885_fh *fh = file->private_data;
	struct cx23885_dev *dev = fh->dev;

	/* turn off overlay */
	if (res_check(fh, RESOURCE_OVERLAY)) {
		/* FIXME */
		res_free(dev, fh, RESOURCE_OVERLAY);
	}

	/* stop video capture */
	if (res_check(fh, RESOURCE_VIDEO)) {
		videobuf_queue_cancel(&fh->vidq);
		res_free(dev, fh, RESOURCE_VIDEO);
	}
	if (fh->vidq.read_buf) {
		buffer_release(&fh->vidq, fh->vidq.read_buf);
		kfree(fh->vidq.read_buf);
	}

	/* stop vbi capture */
	if (res_check(fh, RESOURCE_VBI)) {
		if (fh->vbiq.streaming)
			videobuf_streamoff(&fh->vbiq);
		if (fh->vbiq.reading)
			videobuf_read_stop(&fh->vbiq);
		res_free(dev, fh, RESOURCE_VBI);
	}

	videobuf_mmap_free(&fh->vidq);
	file->private_data = NULL;
	kfree(fh);

	/* We are not putting the tuner to sleep here on exit, because
	 * we want to use the mpeg encoder in another session to capture
	 * tuner video. Closing this will result in no video to the encoder.
	 */

	return 0;
}

static int video_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct cx23885_fh *fh = file->private_data;

	return videobuf_mmap_mapper(get_queue(fh), vma);
}

/* ------------------------------------------------------------------ */
/* VIDEO CTRL IOCTLS                                                  */

static int cx23885_get_control(struct cx23885_dev *dev,
	struct v4l2_control *ctl)
{
	dprintk(1, "%s() calling cx25840(VIDIOC_G_CTRL)\n", __func__);
	call_all(dev, core, g_ctrl, ctl);
	return 0;
}

static int cx23885_set_control(struct cx23885_dev *dev,
	struct v4l2_control *ctl)
{
	dprintk(1, "%s() calling cx25840(VIDIOC_S_CTRL)"
		" (disabled - no action)\n", __func__);
	return 0;
}

static void init_controls(struct cx23885_dev *dev)
{
	struct v4l2_control ctrl;
	int i;

	for (i = 0; i < CX23885_CTLS; i++) {
		ctrl.id = cx23885_ctls[i].v.id;
		ctrl.value = cx23885_ctls[i].v.default_value;

		cx23885_set_control(dev, &ctrl);
	}
}

/* ------------------------------------------------------------------ */
/* VIDEO IOCTLS                                                       */

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_fh *fh   = priv;

	f->fmt.pix.width        = fh->width;
	f->fmt.pix.height       = fh->height;
	f->fmt.pix.field        = fh->vidq.field;
	f->fmt.pix.pixelformat  = fh->fmt->fourcc;
	f->fmt.pix.bytesperline =
		(f->fmt.pix.width * fh->fmt->depth) >> 3;
	f->fmt.pix.sizeimage =
		f->fmt.pix.height * f->fmt.pix.bytesperline;

	return 0;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	struct cx23885_fmt *fmt;
	enum v4l2_field   field;
	unsigned int      maxw, maxh;

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
	if (NULL == fmt)
		return -EINVAL;

	field = f->fmt.pix.field;
	maxw  = norm_maxw(dev->tvnorm);
	maxh  = norm_maxh(dev->tvnorm);

	if (V4L2_FIELD_ANY == field) {
		field = (f->fmt.pix.height > maxh/2)
			? V4L2_FIELD_INTERLACED
			: V4L2_FIELD_BOTTOM;
	}

	switch (field) {
	case V4L2_FIELD_TOP:
	case V4L2_FIELD_BOTTOM:
		maxh = maxh / 2;
		break;
	case V4L2_FIELD_INTERLACED:
		break;
	default:
		return -EINVAL;
	}

	f->fmt.pix.field = field;
	v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2,
			      &f->fmt.pix.height, 32, maxh, 0, 0);
	f->fmt.pix.bytesperline =
		(f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage =
		f->fmt.pix.height * f->fmt.pix.bytesperline;

	return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev  = ((struct cx23885_fh *)priv)->dev;
	int err;

	dprintk(2, "%s()\n", __func__);
	err = vidioc_try_fmt_vid_cap(file, priv, f);

	if (0 != err)
		return err;
	fh->fmt        = format_by_fourcc(f->fmt.pix.pixelformat);
	fh->width      = f->fmt.pix.width;
	fh->height     = f->fmt.pix.height;
	fh->vidq.field = f->fmt.pix.field;
	dprintk(2, "%s() width=%d height=%d field=%d\n", __func__,
		fh->width, fh->height, fh->vidq.field);
	call_all(dev, video, s_fmt, f);
	return 0;
}

static int vidioc_querycap(struct file *file, void  *priv,
	struct v4l2_capability *cap)
{
	struct cx23885_dev *dev  = ((struct cx23885_fh *)priv)->dev;

	strcpy(cap->driver, "cx23885");
	strlcpy(cap->card, cx23885_boards[dev->board].name,
		sizeof(cap->card));
	sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
	cap->version = CX23885_VERSION_CODE;
	cap->capabilities =
		V4L2_CAP_VIDEO_CAPTURE |
		V4L2_CAP_READWRITE     |
		V4L2_CAP_STREAMING     |
		V4L2_CAP_VBI_CAPTURE;
	if (UNSET != dev->tuner_type)
		cap->capabilities |= V4L2_CAP_TUNER;
	return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
	struct v4l2_fmtdesc *f)
{
	if (unlikely(f->index >= ARRAY_SIZE(formats)))
		return -EINVAL;

	strlcpy(f->description, formats[f->index].name,
		sizeof(f->description));
	f->pixelformat = formats[f->index].fourcc;

	return 0;
}

#ifdef CONFIG_VIDEO_V4L1_COMPAT
static int vidiocgmbuf(struct file *file, void *priv,
	struct video_mbuf *mbuf)
{
	struct cx23885_fh *fh = priv;
	struct videobuf_queue *q;
	struct v4l2_requestbuffers req;
	unsigned int i;
	int err;

	q = get_queue(fh);
	memset(&req, 0, sizeof(req));
	req.type   = q->type;
	req.count  = 8;
	req.memory = V4L2_MEMORY_MMAP;
	err = videobuf_reqbufs(q, &req);
	if (err < 0)
		return err;

	mbuf->frames = req.count;
	mbuf->size   = 0;
	for (i = 0; i < mbuf->frames; i++) {
		mbuf->offsets[i]  = q->bufs[i]->boff;
		mbuf->size       += q->bufs[i]->bsize;
	}
	return 0;
}
#endif

static int vidioc_reqbufs(struct file *file, void *priv,
	struct v4l2_requestbuffers *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_reqbufs(get_queue(fh), p);
}

static int vidioc_querybuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_querybuf(get_queue(fh), p);
}

static int vidioc_qbuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_qbuf(get_queue(fh), p);
}

static int vidioc_dqbuf(struct file *file, void *priv,
	struct v4l2_buffer *p)
{
	struct cx23885_fh *fh = priv;
	return videobuf_dqbuf(get_queue(fh), p,
				file->f_flags & O_NONBLOCK);
}

static int vidioc_streamon(struct file *file, void *priv,
	enum v4l2_buf_type i)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;
	dprintk(1, "%s()\n", __func__);

	if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
		return -EINVAL;
	if (unlikely(i != fh->type))
		return -EINVAL;

	if (unlikely(!res_get(dev, fh, get_resource(fh))))
		return -EBUSY;
	return videobuf_streamon(get_queue(fh));
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;
	int err, res;
	dprintk(1, "%s()\n", __func__);

	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (i != fh->type)
		return -EINVAL;

	res = get_resource(fh);
	err = videobuf_streamoff(get_queue(fh));
	if (err < 0)
		return err;
	res_free(dev, fh, res);
	return 0;
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	dprintk(1, "%s()\n", __func__);

	mutex_lock(&dev->lock);
	cx23885_set_tvnorm(dev, *tvnorms);
	mutex_unlock(&dev->lock);

	return 0;
}

static int cx23885_enum_input(struct cx23885_dev *dev, struct v4l2_input *i)
{
	static const char *iname[] = {
		[CX23885_VMUX_COMPOSITE1] = "Composite1",
		[CX23885_VMUX_COMPOSITE2] = "Composite2",
		[CX23885_VMUX_COMPOSITE3] = "Composite3",
		[CX23885_VMUX_COMPOSITE4] = "Composite4",
		[CX23885_VMUX_SVIDEO]     = "S-Video",
		[CX23885_VMUX_TELEVISION] = "Television",
		[CX23885_VMUX_CABLE]      = "Cable TV",
		[CX23885_VMUX_DVB]        = "DVB",
		[CX23885_VMUX_DEBUG]      = "for debug only",
	};
	unsigned int n;
	dprintk(1, "%s()\n", __func__);

	n = i->index;
	if (n >= 4)
		return -EINVAL;

	if (0 == INPUT(n)->type)
		return -EINVAL;

	memset(i, 0, sizeof(*i));
	i->index = n;
	i->type  = V4L2_INPUT_TYPE_CAMERA;
	strcpy(i->name, iname[INPUT(n)->type]);
	if ((CX23885_VMUX_TELEVISION == INPUT(n)->type) ||
		(CX23885_VMUX_CABLE == INPUT(n)->type))
		i->type = V4L2_INPUT_TYPE_TUNER;
		i->std = CX23885_NORMS;
	return 0;
}

static int vidioc_enum_input(struct file *file, void *priv,
				struct v4l2_input *i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
	dprintk(1, "%s()\n", __func__);
	return cx23885_enum_input(dev, i);
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	*i = dev->input;
	dprintk(1, "%s() returns %d\n", __func__, *i);
	return 0;
}

static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	dprintk(1, "%s(%d)\n", __func__, i);

	if (i >= 4) {
		dprintk(1, "%s() -EINVAL\n", __func__);
		return -EINVAL;
	}

	mutex_lock(&dev->lock);
	cx23885_video_mux(dev, i);
	mutex_unlock(&dev->lock);
	return 0;
}

static int vidioc_queryctrl(struct file *file, void *priv,
				struct v4l2_queryctrl *qctrl)
{
	qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
	if (unlikely(qctrl->id == 0))
		return -EINVAL;
	return cx23885_ctrl_query(qctrl);
}

static int vidioc_g_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctl)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	return cx23885_get_control(dev, ctl);
}

static int vidioc_s_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctl)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	return cx23885_set_control(dev, ctl);
}

static int vidioc_g_tuner(struct file *file, void *priv,
				struct v4l2_tuner *t)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;
	if (0 != t->index)
		return -EINVAL;

	strcpy(t->name, "Television");
	t->type       = V4L2_TUNER_ANALOG_TV;
	t->capability = V4L2_TUNER_CAP_NORM;
	t->rangehigh  = 0xffffffffUL;
	t->signal = 0xffff ; /* LOCKED */
	return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
				struct v4l2_tuner *t)
{
	struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

	if (UNSET == dev->tuner_type)
		return -EINVAL;
	if (0 != t->index)
		return -EINVAL;
	return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;

	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;

	/* f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; */
	f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	f->frequency = dev->freq;

	call_all(dev, tuner, g_frequency, f);

	return 0;
}

static int cx23885_set_freq(struct cx23885_dev *dev, struct v4l2_frequency *f)
{
	if (unlikely(UNSET == dev->tuner_type))
		return -EINVAL;
	if (unlikely(f->tuner != 0))
		return -EINVAL;

	mutex_lock(&dev->lock);
	dev->freq = f->frequency;

	call_all(dev, tuner, s_frequency, f);

	/* When changing channels it is required to reset TVAUDIO */
	msleep(10);

	mutex_unlock(&dev->lock);

	return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;

	if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
		return -EINVAL;
	if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
		return -EINVAL;

	return
		cx23885_set_freq(dev, f);
}

/* ----------------------------------------------------------- */

static void cx23885_vid_timeout(unsigned long data)
{
	struct cx23885_dev *dev = (struct cx23885_dev *)data;
	struct cx23885_dmaqueue *q = &dev->vidq;
	struct cx23885_buffer *buf;
	unsigned long flags;

	cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH01]);

	cx_clear(VID_A_DMA_CTL, 0x11);

	spin_lock_irqsave(&dev->slock, flags);
	while (!list_empty(&q->active)) {
		buf = list_entry(q->active.next,
			struct cx23885_buffer, vb.queue);
		list_del(&buf->vb.queue);
		buf->vb.state = VIDEOBUF_ERROR;
		wake_up(&buf->vb.done);
		printk(KERN_ERR "%s/0: [%p/%d] timeout - dma=0x%08lx\n",
			dev->name, buf, buf->vb.i,
			(unsigned long)buf->risc.dma);
	}
	cx23885_restart_video_queue(dev, q);
	spin_unlock_irqrestore(&dev->slock, flags);
}

int cx23885_video_irq(struct cx23885_dev *dev, u32 status)
{
	u32 mask, count;
	int handled = 0;

	mask   = cx_read(VID_A_INT_MSK);
	if (0 == (status & mask))
		return handled;
	cx_write(VID_A_INT_STAT, status);

	dprintk(2, "%s() status = 0x%08x\n", __func__, status);
	/* risc op code error */
	if (status & (1 << 16)) {
		printk(KERN_WARNING "%s/0: video risc op code error\n",
			dev->name);
		cx_clear(VID_A_DMA_CTL, 0x11);
		cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH01]);
	}

	/* risc1 y */
	if (status & 0x01) {
		spin_lock(&dev->slock);
		count = cx_read(VID_A_GPCNT);
		cx23885_video_wakeup(dev, &dev->vidq, count);
		spin_unlock(&dev->slock);
		handled++;
	}
	/* risc2 y */
	if (status & 0x10) {
		dprintk(2, "stopper video\n");
		spin_lock(&dev->slock);
		cx23885_restart_video_queue(dev, &dev->vidq);
		spin_unlock(&dev->slock);
		handled++;
	}

	return handled;
}

/* ----------------------------------------------------------- */
/* exported stuff                                              */

static const struct v4l2_file_operations video_fops = {
	.owner	       = THIS_MODULE,
	.open	       = video_open,
	.release       = video_release,
	.read	       = video_read,
	.poll          = video_poll,
	.mmap	       = video_mmap,
	.ioctl	       = video_ioctl2,
};

static const struct v4l2_ioctl_ops video_ioctl_ops = {
	.vidioc_querycap      = vidioc_querycap,
	.vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
	.vidioc_g_fmt_vbi_cap     = cx23885_vbi_fmt,
	.vidioc_try_fmt_vbi_cap   = cx23885_vbi_fmt,
	.vidioc_s_fmt_vbi_cap     = cx23885_vbi_fmt,
	.vidioc_reqbufs       = vidioc_reqbufs,
	.vidioc_querybuf      = vidioc_querybuf,
	.vidioc_qbuf          = vidioc_qbuf,
	.vidioc_dqbuf         = vidioc_dqbuf,
	.vidioc_s_std         = vidioc_s_std,
	.vidioc_enum_input    = vidioc_enum_input,
	.vidioc_g_input       = vidioc_g_input,
	.vidioc_s_input       = vidioc_s_input,
	.vidioc_queryctrl     = vidioc_queryctrl,
	.vidioc_g_ctrl        = vidioc_g_ctrl,
	.vidioc_s_ctrl        = vidioc_s_ctrl,
	.vidioc_streamon      = vidioc_streamon,
	.vidioc_streamoff     = vidioc_streamoff,
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	.vidiocgmbuf          = vidiocgmbuf,
#endif
	.vidioc_g_tuner       = vidioc_g_tuner,
	.vidioc_s_tuner       = vidioc_s_tuner,
	.vidioc_g_frequency   = vidioc_g_frequency,
	.vidioc_s_frequency   = vidioc_s_frequency,
	.vidioc_g_chip_ident  = cx23885_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.vidioc_g_register    = cx23885_g_register,
	.vidioc_s_register    = cx23885_s_register,
#endif
};

static struct video_device cx23885_vbi_template;
static struct video_device cx23885_video_template = {
	.name                 = "cx23885-video",
	.fops                 = &video_fops,
	.minor                = -1,
	.ioctl_ops 	      = &video_ioctl_ops,
	.tvnorms              = CX23885_NORMS,
	.current_norm         = V4L2_STD_NTSC_M,
};

static const struct v4l2_file_operations radio_fops = {
	.owner         = THIS_MODULE,
	.open          = video_open,
	.release       = video_release,
	.ioctl         = video_ioctl2,
};


void cx23885_video_unregister(struct cx23885_dev *dev)
{
	dprintk(1, "%s()\n", __func__);
	cx_clear(PCI_INT_MSK, 1);

	if (dev->video_dev) {
		if (-1 != dev->video_dev->minor)
			video_unregister_device(dev->video_dev);
		else
			video_device_release(dev->video_dev);
		dev->video_dev = NULL;

		btcx_riscmem_free(dev->pci, &dev->vidq.stopper);
	}
}

int cx23885_video_register(struct cx23885_dev *dev)
{
	int err;

	dprintk(1, "%s()\n", __func__);
	spin_lock_init(&dev->slock);

	/* Initialize VBI template */
	memcpy(&cx23885_vbi_template, &cx23885_video_template,
		sizeof(cx23885_vbi_template));
	strcpy(cx23885_vbi_template.name, "cx23885-vbi");

	dev->tvnorm = cx23885_video_template.current_norm;

	/* init video dma queues */
	INIT_LIST_HEAD(&dev->vidq.active);
	INIT_LIST_HEAD(&dev->vidq.queued);
	dev->vidq.timeout.function = cx23885_vid_timeout;
	dev->vidq.timeout.data = (unsigned long)dev;
	init_timer(&dev->vidq.timeout);
	cx23885_risc_stopper(dev->pci, &dev->vidq.stopper,
		VID_A_DMA_CTL, 0x11, 0x00);

	/* Don't enable VBI yet */
	cx_set(PCI_INT_MSK, 1);

	if (TUNER_ABSENT != dev->tuner_type) {
		struct v4l2_subdev *sd = NULL;

		if (dev->tuner_addr)
			sd = v4l2_i2c_new_subdev(&dev->v4l2_dev,
				&dev->i2c_bus[1].i2c_adap,
				"tuner", "tuner", dev->tuner_addr, NULL);
		else
			sd = v4l2_i2c_new_subdev(&dev->v4l2_dev,
				&dev->i2c_bus[1].i2c_adap,
				"tuner", "tuner", 0, v4l2_i2c_tuner_addrs(ADDRS_TV));
		if (sd) {
			struct tuner_setup tun_setup;

			tun_setup.mode_mask = T_ANALOG_TV;
			tun_setup.type = dev->tuner_type;
			tun_setup.addr = v4l2_i2c_subdev_addr(sd);

			v4l2_subdev_call(sd, tuner, s_type_addr, &tun_setup);
		}
	}


	/* register v4l devices */
	dev->video_dev = cx23885_vdev_init(dev, dev->pci,
		&cx23885_video_template, "video");
	err = video_register_device(dev->video_dev, VFL_TYPE_GRABBER,
				    video_nr[dev->nr]);
	if (err < 0) {
		printk(KERN_INFO "%s: can't register video device\n",
			dev->name);
		goto fail_unreg;
	}
	printk(KERN_INFO "%s/0: registered device video%d [v4l2]\n",
	       dev->name, dev->video_dev->num);
	/* initial device configuration */
	mutex_lock(&dev->lock);
	cx23885_set_tvnorm(dev, dev->tvnorm);
	init_controls(dev);
	cx23885_video_mux(dev, 0);
	mutex_unlock(&dev->lock);

	return 0;

fail_unreg:
	cx23885_video_unregister(dev);
	return err;
}