[media] usbtv: split core and video implementation

Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>
Reviewed-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 0 insertions, 883 deletions

diff --git a/drivers/media/usb/usbtv/usbtv.c b/drivers/media/usb/usbtv/usbtv.c
deleted file mode 100644
index 6222a4ab1e00..000000000000
--- a/drivers/media/usb/usbtv/usbtv.c
+++ /dev/null
@@ -1,883 +0,0 @@
-/*
- * Fushicai USBTV007 Video Grabber Driver
- *
- * Product web site:
- * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
- *
- * Following LWN articles were very useful in construction of this driver:
- * Video4Linux2 API series: http://lwn.net/Articles/203924/
- * videobuf2 API explanation: http://lwn.net/Articles/447435/
- * Thanks go to Jonathan Corbet for providing this quality documentation.
- * He is awesome.
- *
- * Copyright (c) 2013 Lubomir Rintel
- * All rights reserved.
- * No physical hardware was harmed running Windows during the
- * reverse-engineering activity
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification.
- * 2. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL").
- */
-
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/videodev2.h>
-
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-#include <media/videobuf2-core.h>
-#include <media/videobuf2-vmalloc.h>
-
-/* Hardware. */
-#define USBTV_VIDEO_ENDP	0x81
-#define USBTV_BASE		0xc000
-#define USBTV_REQUEST_REG	12
-
-/* Number of concurrent isochronous urbs submitted.
- * Higher numbers was seen to overly saturate the USB bus. */
-#define USBTV_ISOC_TRANSFERS	16
-#define USBTV_ISOC_PACKETS	8
-
-#define USBTV_CHUNK_SIZE	256
-#define USBTV_CHUNK		240
-
-/* Chunk header. */
-#define USBTV_MAGIC_OK(chunk)	((be32_to_cpu(chunk[0]) & 0xff000000) \
-							== 0x88000000)
-#define USBTV_FRAME_ID(chunk)	((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
-#define USBTV_ODD(chunk)	((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
-#define USBTV_CHUNK_NO(chunk)	(be32_to_cpu(chunk[0]) & 0x00000fff)
-
-#define USBTV_TV_STD  (V4L2_STD_525_60 | V4L2_STD_PAL)
-
-/* parameters for supported TV norms */
-struct usbtv_norm_params {
-	v4l2_std_id norm;
-	int cap_width, cap_height;
-};
-
-static struct usbtv_norm_params norm_params[] = {
-	{
-		.norm = V4L2_STD_525_60,
-		.cap_width = 720,
-		.cap_height = 480,
-	},
-	{
-		.norm = V4L2_STD_PAL,
-		.cap_width = 720,
-		.cap_height = 576,
-	}
-};
-
-/* A single videobuf2 frame buffer. */
-struct usbtv_buf {
-	struct vb2_buffer vb;
-	struct list_head list;
-};
-
-/* Per-device structure. */
-struct usbtv {
-	struct device *dev;
-	struct usb_device *udev;
-	struct v4l2_device v4l2_dev;
-	struct video_device vdev;
-	struct vb2_queue vb2q;
-	struct mutex v4l2_lock;
-	struct mutex vb2q_lock;
-
-	/* List of videobuf2 buffers protected by a lock. */
-	spinlock_t buflock;
-	struct list_head bufs;
-
-	/* Number of currently processed frame, useful find
-	 * out when a new one begins. */
-	u32 frame_id;
-	int chunks_done;
-
-	enum {
-		USBTV_COMPOSITE_INPUT,
-		USBTV_SVIDEO_INPUT,
-	} input;
-	v4l2_std_id norm;
-	int width, height;
-	int n_chunks;
-	int iso_size;
-	unsigned int sequence;
-	struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
-};
-
-static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
-{
-	int i, ret = 0;
-	struct usbtv_norm_params *params = NULL;
-
-	for (i = 0; i < ARRAY_SIZE(norm_params); i++) {
-		if (norm_params[i].norm & norm) {
-			params = &norm_params[i];
-			break;
-		}
-	}
-
-	if (params) {
-		usbtv->width = params->cap_width;
-		usbtv->height = params->cap_height;
-		usbtv->n_chunks = usbtv->width * usbtv->height
-						/ 4 / USBTV_CHUNK;
-		usbtv->norm = params->norm;
-	} else
-		ret = -EINVAL;
-
-	return ret;
-}
-
-static int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
-{
-	int ret;
-	int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
-	int i;
-
-	for (i = 0; i < size; i++) {
-		u16 index = regs[i][0];
-		u16 value = regs[i][1];
-
-		ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
-			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
-			value, index, NULL, 0, 0);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
-static int usbtv_select_input(struct usbtv *usbtv, int input)
-{
-	int ret;
-
-	static const u16 composite[][2] = {
-		{ USBTV_BASE + 0x0105, 0x0060 },
-		{ USBTV_BASE + 0x011f, 0x00f2 },
-		{ USBTV_BASE + 0x0127, 0x0060 },
-		{ USBTV_BASE + 0x00ae, 0x0010 },
-		{ USBTV_BASE + 0x0284, 0x00aa },
-		{ USBTV_BASE + 0x0239, 0x0060 },
-	};
-
-	static const u16 svideo[][2] = {
-		{ USBTV_BASE + 0x0105, 0x0010 },
-		{ USBTV_BASE + 0x011f, 0x00ff },
-		{ USBTV_BASE + 0x0127, 0x0060 },
-		{ USBTV_BASE + 0x00ae, 0x0030 },
-		{ USBTV_BASE + 0x0284, 0x0088 },
-		{ USBTV_BASE + 0x0239, 0x0060 },
-	};
-
-	switch (input) {
-	case USBTV_COMPOSITE_INPUT:
-		ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
-		break;
-	case USBTV_SVIDEO_INPUT:
-		ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
-		break;
-	default:
-		ret = -EINVAL;
-	}
-
-	if (!ret)
-		usbtv->input = input;
-
-	return ret;
-}
-
-static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
-{
-	int ret;
-	static const u16 pal[][2] = {
-		{ USBTV_BASE + 0x001a, 0x0068 },
-		{ USBTV_BASE + 0x010e, 0x0072 },
-		{ USBTV_BASE + 0x010f, 0x00a2 },
-		{ USBTV_BASE + 0x0112, 0x00b0 },
-		{ USBTV_BASE + 0x0117, 0x0001 },
-		{ USBTV_BASE + 0x0118, 0x002c },
-		{ USBTV_BASE + 0x012d, 0x0010 },
-		{ USBTV_BASE + 0x012f, 0x0020 },
-		{ USBTV_BASE + 0x024f, 0x0002 },
-		{ USBTV_BASE + 0x0254, 0x0059 },
-		{ USBTV_BASE + 0x025a, 0x0016 },
-		{ USBTV_BASE + 0x025b, 0x0035 },
-		{ USBTV_BASE + 0x0263, 0x0017 },
-		{ USBTV_BASE + 0x0266, 0x0016 },
-		{ USBTV_BASE + 0x0267, 0x0036 }
-	};
-
-	static const u16 ntsc[][2] = {
-		{ USBTV_BASE + 0x001a, 0x0079 },
-		{ USBTV_BASE + 0x010e, 0x0068 },
-		{ USBTV_BASE + 0x010f, 0x009c },
-		{ USBTV_BASE + 0x0112, 0x00f0 },
-		{ USBTV_BASE + 0x0117, 0x0000 },
-		{ USBTV_BASE + 0x0118, 0x00fc },
-		{ USBTV_BASE + 0x012d, 0x0004 },
-		{ USBTV_BASE + 0x012f, 0x0008 },
-		{ USBTV_BASE + 0x024f, 0x0001 },
-		{ USBTV_BASE + 0x0254, 0x005f },
-		{ USBTV_BASE + 0x025a, 0x0012 },
-		{ USBTV_BASE + 0x025b, 0x0001 },
-		{ USBTV_BASE + 0x0263, 0x001c },
-		{ USBTV_BASE + 0x0266, 0x0011 },
-		{ USBTV_BASE + 0x0267, 0x0005 }
-	};
-
-	ret = usbtv_configure_for_norm(usbtv, norm);
-
-	if (!ret) {
-		if (norm & V4L2_STD_525_60)
-			ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
-		else if (norm & V4L2_STD_PAL)
-			ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
-	}
-
-	return ret;
-}
-
-static int usbtv_setup_capture(struct usbtv *usbtv)
-{
-	int ret;
-	static const u16 setup[][2] = {
-		/* These seem to enable the device. */
-		{ USBTV_BASE + 0x0008, 0x0001 },
-		{ USBTV_BASE + 0x01d0, 0x00ff },
-		{ USBTV_BASE + 0x01d9, 0x0002 },
-
-		/* These seem to influence color parameters, such as
-		 * brightness, etc. */
-		{ USBTV_BASE + 0x0239, 0x0040 },
-		{ USBTV_BASE + 0x0240, 0x0000 },
-		{ USBTV_BASE + 0x0241, 0x0000 },
-		{ USBTV_BASE + 0x0242, 0x0002 },
-		{ USBTV_BASE + 0x0243, 0x0080 },
-		{ USBTV_BASE + 0x0244, 0x0012 },
-		{ USBTV_BASE + 0x0245, 0x0090 },
-		{ USBTV_BASE + 0x0246, 0x0000 },
-
-		{ USBTV_BASE + 0x0278, 0x002d },
-		{ USBTV_BASE + 0x0279, 0x000a },
-		{ USBTV_BASE + 0x027a, 0x0032 },
-		{ 0xf890, 0x000c },
-		{ 0xf894, 0x0086 },
-
-		{ USBTV_BASE + 0x00ac, 0x00c0 },
-		{ USBTV_BASE + 0x00ad, 0x0000 },
-		{ USBTV_BASE + 0x00a2, 0x0012 },
-		{ USBTV_BASE + 0x00a3, 0x00e0 },
-		{ USBTV_BASE + 0x00a4, 0x0028 },
-		{ USBTV_BASE + 0x00a5, 0x0082 },
-		{ USBTV_BASE + 0x00a7, 0x0080 },
-		{ USBTV_BASE + 0x0000, 0x0014 },
-		{ USBTV_BASE + 0x0006, 0x0003 },
-		{ USBTV_BASE + 0x0090, 0x0099 },
-		{ USBTV_BASE + 0x0091, 0x0090 },
-		{ USBTV_BASE + 0x0094, 0x0068 },
-		{ USBTV_BASE + 0x0095, 0x0070 },
-		{ USBTV_BASE + 0x009c, 0x0030 },
-		{ USBTV_BASE + 0x009d, 0x00c0 },
-		{ USBTV_BASE + 0x009e, 0x00e0 },
-		{ USBTV_BASE + 0x0019, 0x0006 },
-		{ USBTV_BASE + 0x008c, 0x00ba },
-		{ USBTV_BASE + 0x0101, 0x00ff },
-		{ USBTV_BASE + 0x010c, 0x00b3 },
-		{ USBTV_BASE + 0x01b2, 0x0080 },
-		{ USBTV_BASE + 0x01b4, 0x00a0 },
-		{ USBTV_BASE + 0x014c, 0x00ff },
-		{ USBTV_BASE + 0x014d, 0x00ca },
-		{ USBTV_BASE + 0x0113, 0x0053 },
-		{ USBTV_BASE + 0x0119, 0x008a },
-		{ USBTV_BASE + 0x013c, 0x0003 },
-		{ USBTV_BASE + 0x0150, 0x009c },
-		{ USBTV_BASE + 0x0151, 0x0071 },
-		{ USBTV_BASE + 0x0152, 0x00c6 },
-		{ USBTV_BASE + 0x0153, 0x0084 },
-		{ USBTV_BASE + 0x0154, 0x00bc },
-		{ USBTV_BASE + 0x0155, 0x00a0 },
-		{ USBTV_BASE + 0x0156, 0x00a0 },
-		{ USBTV_BASE + 0x0157, 0x009c },
-		{ USBTV_BASE + 0x0158, 0x001f },
-		{ USBTV_BASE + 0x0159, 0x0006 },
-		{ USBTV_BASE + 0x015d, 0x0000 },
-
-		{ USBTV_BASE + 0x0284, 0x0088 },
-		{ USBTV_BASE + 0x0003, 0x0004 },
-		{ USBTV_BASE + 0x0100, 0x00d3 },
-		{ USBTV_BASE + 0x0115, 0x0015 },
-		{ USBTV_BASE + 0x0220, 0x002e },
-		{ USBTV_BASE + 0x0225, 0x0008 },
-		{ USBTV_BASE + 0x024e, 0x0002 },
-		{ USBTV_BASE + 0x024e, 0x0002 },
-		{ USBTV_BASE + 0x024f, 0x0002 },
-	};
-
-	ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
-	if (ret)
-		return ret;
-
-	ret = usbtv_select_norm(usbtv, usbtv->norm);
-	if (ret)
-		return ret;
-
-	ret = usbtv_select_input(usbtv, usbtv->input);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-/* Copy data from chunk into a frame buffer, deinterlacing the data
- * into every second line. Unfortunately, they don't align nicely into
- * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels.
- * Therefore, we break down the chunk into two halves before copyting,
- * so that we can interleave a line if needed. */
-static void usbtv_chunk_to_vbuf(u32 *frame, u32 *src, int chunk_no, int odd)
-{
-	int half;
-
-	for (half = 0; half < 2; half++) {
-		int part_no = chunk_no * 2 + half;
-		int line = part_no / 3;
-		int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
-
-		u32 *dst = &frame[part_index * USBTV_CHUNK/2];
-		memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
-		src += USBTV_CHUNK/2;
-	}
-}
-
-/* Called for each 256-byte image chunk.
- * First word identifies the chunk, followed by 240 words of image
- * data and padding. */
-static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk)
-{
-	int frame_id, odd, chunk_no;
-	u32 *frame;
-	struct usbtv_buf *buf;
-	unsigned long flags;
-
-	/* Ignore corrupted lines. */
-	if (!USBTV_MAGIC_OK(chunk))
-		return;
-	frame_id = USBTV_FRAME_ID(chunk);
-	odd = USBTV_ODD(chunk);
-	chunk_no = USBTV_CHUNK_NO(chunk);
-	if (chunk_no >= usbtv->n_chunks)
-		return;
-
-	/* Beginning of a frame. */
-	if (chunk_no == 0) {
-		usbtv->frame_id = frame_id;
-		usbtv->chunks_done = 0;
-	}
-
-	if (usbtv->frame_id != frame_id)
-		return;
-
-	spin_lock_irqsave(&usbtv->buflock, flags);
-	if (list_empty(&usbtv->bufs)) {
-		/* No free buffers. Userspace likely too slow. */
-		spin_unlock_irqrestore(&usbtv->buflock, flags);
-		return;
-	}
-
-	/* First available buffer. */
-	buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
-	frame = vb2_plane_vaddr(&buf->vb, 0);
-
-	/* Copy the chunk data. */
-	usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
-	usbtv->chunks_done++;
-
-	/* Last chunk in a frame, signalling an end */
-	if (odd && chunk_no == usbtv->n_chunks-1) {
-		int size = vb2_plane_size(&buf->vb, 0);
-		enum vb2_buffer_state state = usbtv->chunks_done ==
-						usbtv->n_chunks ?
-						VB2_BUF_STATE_DONE :
-						VB2_BUF_STATE_ERROR;
-
-		buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
-		buf->vb.v4l2_buf.sequence = usbtv->sequence++;
-		v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
-		vb2_set_plane_payload(&buf->vb, 0, size);
-		vb2_buffer_done(&buf->vb, state);
-		list_del(&buf->list);
-	}
-
-	spin_unlock_irqrestore(&usbtv->buflock, flags);
-}
-
-/* Got image data. Each packet contains a number of 256-word chunks we
- * compose the image from. */
-static void usbtv_iso_cb(struct urb *ip)
-{
-	int ret;
-	int i;
-	struct usbtv *usbtv = (struct usbtv *)ip->context;
-
-	switch (ip->status) {
-	/* All fine. */
-	case 0:
-		break;
-	/* Device disconnected or capture stopped? */
-	case -ENODEV:
-	case -ENOENT:
-	case -ECONNRESET:
-	case -ESHUTDOWN:
-		return;
-	/* Unknown error. Retry. */
-	default:
-		dev_warn(usbtv->dev, "Bad response for ISO request.\n");
-		goto resubmit;
-	}
-
-	for (i = 0; i < ip->number_of_packets; i++) {
-		int size = ip->iso_frame_desc[i].actual_length;
-		unsigned char *data = ip->transfer_buffer +
-				ip->iso_frame_desc[i].offset;
-		int offset;
-
-		for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
-			usbtv_image_chunk(usbtv,
-				(u32 *)&data[USBTV_CHUNK_SIZE * offset]);
-	}
-
-resubmit:
-	ret = usb_submit_urb(ip, GFP_ATOMIC);
-	if (ret < 0)
-		dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
-}
-
-static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
-{
-	struct urb *ip;
-	int size = usbtv->iso_size;
-	int i;
-
-	ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
-	if (ip == NULL)
-		return NULL;
-
-	ip->dev = usbtv->udev;
-	ip->context = usbtv;
-	ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
-	ip->interval = 1;
-	ip->transfer_flags = URB_ISO_ASAP;
-	ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
-						GFP_KERNEL);
-	ip->complete = usbtv_iso_cb;
-	ip->number_of_packets = USBTV_ISOC_PACKETS;
-	ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
-	for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
-		ip->iso_frame_desc[i].offset = size * i;
-		ip->iso_frame_desc[i].length = size;
-	}
-
-	return ip;
-}
-
-static void usbtv_stop(struct usbtv *usbtv)
-{
-	int i;
-	unsigned long flags;
-
-	/* Cancel running transfers. */
-	for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
-		struct urb *ip = usbtv->isoc_urbs[i];
-		if (ip == NULL)
-			continue;
-		usb_kill_urb(ip);
-		kfree(ip->transfer_buffer);
-		usb_free_urb(ip);
-		usbtv->isoc_urbs[i] = NULL;
-	}
-
-	/* Return buffers to userspace. */
-	spin_lock_irqsave(&usbtv->buflock, flags);
-	while (!list_empty(&usbtv->bufs)) {
-		struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
-						struct usbtv_buf, list);
-		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
-		list_del(&buf->list);
-	}
-	spin_unlock_irqrestore(&usbtv->buflock, flags);
-}
-
-static int usbtv_start(struct usbtv *usbtv)
-{
-	int i;
-	int ret;
-
-	ret = usb_set_interface(usbtv->udev, 0, 0);
-	if (ret < 0)
-		return ret;
-
-	ret = usbtv_setup_capture(usbtv);
-	if (ret < 0)
-		return ret;
-
-	ret = usb_set_interface(usbtv->udev, 0, 1);
-	if (ret < 0)
-		return ret;
-
-	for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
-		struct urb *ip;
-
-		ip = usbtv_setup_iso_transfer(usbtv);
-		if (ip == NULL) {
-			ret = -ENOMEM;
-			goto start_fail;
-		}
-		usbtv->isoc_urbs[i] = ip;
-
-		ret = usb_submit_urb(ip, GFP_KERNEL);
-		if (ret < 0)
-			goto start_fail;
-	}
-
-	return 0;
-
-start_fail:
-	usbtv_stop(usbtv);
-	return ret;
-}
-
-struct usb_device_id usbtv_id_table[] = {
-	{ USB_DEVICE(0x1b71, 0x3002) },
-	{}
-};
-MODULE_DEVICE_TABLE(usb, usbtv_id_table);
-
-static int usbtv_querycap(struct file *file, void *priv,
-				struct v4l2_capability *cap)
-{
-	struct usbtv *dev = video_drvdata(file);
-
-	strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
-	strlcpy(cap->card, "usbtv", sizeof(cap->card));
-	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
-	cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
-	return 0;
-}
-
-static int usbtv_enum_input(struct file *file, void *priv,
-					struct v4l2_input *i)
-{
-	struct usbtv *dev = video_drvdata(file);
-
-	switch (i->index) {
-	case USBTV_COMPOSITE_INPUT:
-		strlcpy(i->name, "Composite", sizeof(i->name));
-		break;
-	case USBTV_SVIDEO_INPUT:
-		strlcpy(i->name, "S-Video", sizeof(i->name));
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	i->type = V4L2_INPUT_TYPE_CAMERA;
-	i->std = dev->vdev.tvnorms;
-	return 0;
-}
-
-static int usbtv_enum_fmt_vid_cap(struct file *file, void  *priv,
-					struct v4l2_fmtdesc *f)
-{
-	if (f->index > 0)
-		return -EINVAL;
-
-	strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
-					sizeof(f->description));
-	f->pixelformat = V4L2_PIX_FMT_YUYV;
-	return 0;
-}
-
-static int usbtv_fmt_vid_cap(struct file *file, void *priv,
-					struct v4l2_format *f)
-{
-	struct usbtv *usbtv = video_drvdata(file);
-
-	f->fmt.pix.width = usbtv->width;
-	f->fmt.pix.height = usbtv->height;
-	f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
-	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
-	f->fmt.pix.bytesperline = usbtv->width * 2;
-	f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
-	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
-
-	return 0;
-}
-
-static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
-{
-	struct usbtv *usbtv = video_drvdata(file);
-	*norm = usbtv->norm;
-	return 0;
-}
-
-static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
-{
-	int ret = -EINVAL;
-	struct usbtv *usbtv = video_drvdata(file);
-
-	if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL))
-		ret = usbtv_select_norm(usbtv, norm);
-
-	return ret;
-}
-
-static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
-{
-	struct usbtv *usbtv = video_drvdata(file);
-	*i = usbtv->input;
-	return 0;
-}
-
-static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
-{
-	struct usbtv *usbtv = video_drvdata(file);
-	return usbtv_select_input(usbtv, i);
-}
-
-struct v4l2_ioctl_ops usbtv_ioctl_ops = {
-	.vidioc_querycap = usbtv_querycap,
-	.vidioc_enum_input = usbtv_enum_input,
-	.vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
-	.vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
-	.vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
-	.vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
-	.vidioc_g_std = usbtv_g_std,
-	.vidioc_s_std = usbtv_s_std,
-	.vidioc_g_input = usbtv_g_input,
-	.vidioc_s_input = usbtv_s_input,
-
-	.vidioc_reqbufs = vb2_ioctl_reqbufs,
-	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
-	.vidioc_querybuf = vb2_ioctl_querybuf,
-	.vidioc_create_bufs = vb2_ioctl_create_bufs,
-	.vidioc_qbuf = vb2_ioctl_qbuf,
-	.vidioc_dqbuf = vb2_ioctl_dqbuf,
-	.vidioc_streamon = vb2_ioctl_streamon,
-	.vidioc_streamoff = vb2_ioctl_streamoff,
-};
-
-struct v4l2_file_operations usbtv_fops = {
-	.owner = THIS_MODULE,
-	.unlocked_ioctl = video_ioctl2,
-	.mmap = vb2_fop_mmap,
-	.open = v4l2_fh_open,
-	.release = vb2_fop_release,
-	.read = vb2_fop_read,
-	.poll = vb2_fop_poll,
-};
-
-static int usbtv_queue_setup(struct vb2_queue *vq,
-	const struct v4l2_format *v4l_fmt, unsigned int *nbuffers,
-	unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
-{
-	struct usbtv *usbtv = vb2_get_drv_priv(vq);
-
-	if (*nbuffers < 2)
-		*nbuffers = 2;
-	*nplanes = 1;
-	sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
-
-	return 0;
-}
-
-static void usbtv_buf_queue(struct vb2_buffer *vb)
-{
-	struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
-	struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb);
-	unsigned long flags;
-
-	if (usbtv->udev == NULL) {
-		vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
-		return;
-	}
-
-	spin_lock_irqsave(&usbtv->buflock, flags);
-	list_add_tail(&buf->list, &usbtv->bufs);
-	spin_unlock_irqrestore(&usbtv->buflock, flags);
-}
-
-static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
-{
-	struct usbtv *usbtv = vb2_get_drv_priv(vq);
-
-	if (usbtv->udev == NULL)
-		return -ENODEV;
-
-	return usbtv_start(usbtv);
-}
-
-static int usbtv_stop_streaming(struct vb2_queue *vq)
-{
-	struct usbtv *usbtv = vb2_get_drv_priv(vq);
-
-	if (usbtv->udev == NULL)
-		return -ENODEV;
-
-	usbtv_stop(usbtv);
-	return 0;
-}
-
-struct vb2_ops usbtv_vb2_ops = {
-	.queue_setup = usbtv_queue_setup,
-	.buf_queue = usbtv_buf_queue,
-	.start_streaming = usbtv_start_streaming,
-	.stop_streaming = usbtv_stop_streaming,
-};
-
-static void usbtv_release(struct v4l2_device *v4l2_dev)
-{
-	struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
-
-	v4l2_device_unregister(&usbtv->v4l2_dev);
-	vb2_queue_release(&usbtv->vb2q);
-	kfree(usbtv);
-}
-
-static int usbtv_probe(struct usb_interface *intf,
-	const struct usb_device_id *id)
-{
-	int ret;
-	int size;
-	struct device *dev = &intf->dev;
-	struct usbtv *usbtv;
-
-	/* Checks that the device is what we think it is. */
-	if (intf->num_altsetting != 2)
-		return -ENODEV;
-	if (intf->altsetting[1].desc.bNumEndpoints != 4)
-		return -ENODEV;
-
-	/* Packet size is split into 11 bits of base size and count of
-	 * extra multiplies of it.*/
-	size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
-	size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
-
-	/* Device structure */
-	usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
-	if (usbtv == NULL)
-		return -ENOMEM;
-	usbtv->dev = dev;
-	usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
-
-	usbtv->iso_size = size;
-
-	(void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
-
-	spin_lock_init(&usbtv->buflock);
-	mutex_init(&usbtv->v4l2_lock);
-	mutex_init(&usbtv->vb2q_lock);
-	INIT_LIST_HEAD(&usbtv->bufs);
-
-	/* videobuf2 structure */
-	usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
-	usbtv->vb2q.drv_priv = usbtv;
-	usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
-	usbtv->vb2q.ops = &usbtv_vb2_ops;
-	usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
-	usbtv->vb2q.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	usbtv->vb2q.lock = &usbtv->vb2q_lock;
-	ret = vb2_queue_init(&usbtv->vb2q);
-	if (ret < 0) {
-		dev_warn(dev, "Could not initialize videobuf2 queue\n");
-		goto usbtv_fail;
-	}
-
-	/* v4l2 structure */
-	usbtv->v4l2_dev.release = usbtv_release;
-	ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
-	if (ret < 0) {
-		dev_warn(dev, "Could not register v4l2 device\n");
-		goto v4l2_fail;
-	}
-
-	usb_set_intfdata(intf, usbtv);
-
-	/* Video structure */
-	strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
-	usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
-	usbtv->vdev.release = video_device_release_empty;
-	usbtv->vdev.fops = &usbtv_fops;
-	usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
-	usbtv->vdev.tvnorms = USBTV_TV_STD;
-	usbtv->vdev.queue = &usbtv->vb2q;
-	usbtv->vdev.lock = &usbtv->v4l2_lock;
-	set_bit(V4L2_FL_USE_FH_PRIO, &usbtv->vdev.flags);
-	video_set_drvdata(&usbtv->vdev, usbtv);
-	ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
-	if (ret < 0) {
-		dev_warn(dev, "Could not register video device\n");
-		goto vdev_fail;
-	}
-
-	dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
-	return 0;
-
-vdev_fail:
-	v4l2_device_unregister(&usbtv->v4l2_dev);
-v4l2_fail:
-	vb2_queue_release(&usbtv->vb2q);
-usbtv_fail:
-	kfree(usbtv);
-
-	return ret;
-}
-
-static void usbtv_disconnect(struct usb_interface *intf)
-{
-	struct usbtv *usbtv = usb_get_intfdata(intf);
-
-	mutex_lock(&usbtv->vb2q_lock);
-	mutex_lock(&usbtv->v4l2_lock);
-
-	usbtv_stop(usbtv);
-	usb_set_intfdata(intf, NULL);
-	video_unregister_device(&usbtv->vdev);
-	v4l2_device_disconnect(&usbtv->v4l2_dev);
-	usb_put_dev(usbtv->udev);
-	usbtv->udev = NULL;
-
-	mutex_unlock(&usbtv->v4l2_lock);
-	mutex_unlock(&usbtv->vb2q_lock);
-
-	v4l2_device_put(&usbtv->v4l2_dev);
-}
-
-MODULE_AUTHOR("Lubomir Rintel");
-MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
-MODULE_LICENSE("Dual BSD/GPL");
-
-struct usb_driver usbtv_usb_driver = {
-	.name = "usbtv",
-	.id_table = usbtv_id_table,
-	.probe = usbtv_probe,
-	.disconnect = usbtv_disconnect,
-};
-
-module_usb_driver(usbtv_usb_driver);