usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 0 insertions, 836 deletions

diff --git a/drivers/usb/gadget/f_uvc.c b/drivers/usb/gadget/f_uvc.c
deleted file mode 100644
index e2a1f50bd93..00000000000
--- a/drivers/usb/gadget/f_uvc.c
+++ /dev/null
@@ -1,836 +0,0 @@
-/*
- *	uvc_gadget.c  --  USB Video Class Gadget driver
- *
- *	Copyright (C) 2009-2010
- *	    Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- *	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.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/string.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/video.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-
-#include <media/v4l2-dev.h>
-#include <media/v4l2-event.h>
-
-#include "uvc.h"
-
-unsigned int uvc_gadget_trace_param;
-
-/*-------------------------------------------------------------------------*/
-
-/* module parameters specific to the Video streaming endpoint */
-static unsigned int streaming_interval = 1;
-module_param(streaming_interval, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_interval, "1 - 16");
-
-static unsigned int streaming_maxpacket = 1024;
-module_param(streaming_maxpacket, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_maxpacket, "1 - 1023 (FS), 1 - 3072 (hs/ss)");
-
-static unsigned int streaming_maxburst;
-module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
-
-/* --------------------------------------------------------------------------
- * Function descriptors
- */
-
-/* string IDs are assigned dynamically */
-
-#define UVC_STRING_CONTROL_IDX			0
-#define UVC_STRING_STREAMING_IDX		1
-
-static struct usb_string uvc_en_us_strings[] = {
-	[UVC_STRING_CONTROL_IDX].s = "UVC Camera",
-	[UVC_STRING_STREAMING_IDX].s = "Video Streaming",
-	{  }
-};
-
-static struct usb_gadget_strings uvc_stringtab = {
-	.language = 0x0409,	/* en-us */
-	.strings = uvc_en_us_strings,
-};
-
-static struct usb_gadget_strings *uvc_function_strings[] = {
-	&uvc_stringtab,
-	NULL,
-};
-
-#define UVC_INTF_VIDEO_CONTROL			0
-#define UVC_INTF_VIDEO_STREAMING		1
-
-#define UVC_STATUS_MAX_PACKET_SIZE		16	/* 16 bytes status */
-
-static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
-	.bLength		= sizeof(uvc_iad),
-	.bDescriptorType	= USB_DT_INTERFACE_ASSOCIATION,
-	.bFirstInterface	= 0,
-	.bInterfaceCount	= 2,
-	.bFunctionClass		= USB_CLASS_VIDEO,
-	.bFunctionSubClass	= UVC_SC_VIDEO_INTERFACE_COLLECTION,
-	.bFunctionProtocol	= 0x00,
-	.iFunction		= 0,
-};
-
-static struct usb_interface_descriptor uvc_control_intf __initdata = {
-	.bLength		= USB_DT_INTERFACE_SIZE,
-	.bDescriptorType	= USB_DT_INTERFACE,
-	.bInterfaceNumber	= UVC_INTF_VIDEO_CONTROL,
-	.bAlternateSetting	= 0,
-	.bNumEndpoints		= 1,
-	.bInterfaceClass	= USB_CLASS_VIDEO,
-	.bInterfaceSubClass	= UVC_SC_VIDEOCONTROL,
-	.bInterfaceProtocol	= 0x00,
-	.iInterface		= 0,
-};
-
-static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
-	.bLength		= USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType	= USB_DT_ENDPOINT,
-	.bEndpointAddress	= USB_DIR_IN,
-	.bmAttributes		= USB_ENDPOINT_XFER_INT,
-	.wMaxPacketSize		= cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
-	.bInterval		= 8,
-};
-
-static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
-	.bLength		= sizeof(uvc_ss_control_comp),
-	.bDescriptorType	= USB_DT_SS_ENDPOINT_COMP,
-	/* The following 3 values can be tweaked if necessary. */
-	.bMaxBurst		= 0,
-	.bmAttributes		= 0,
-	.wBytesPerInterval	= cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
-};
-
-static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
-	.bLength		= UVC_DT_CONTROL_ENDPOINT_SIZE,
-	.bDescriptorType	= USB_DT_CS_ENDPOINT,
-	.bDescriptorSubType	= UVC_EP_INTERRUPT,
-	.wMaxTransferSize	= cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
-};
-
-static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
-	.bLength		= USB_DT_INTERFACE_SIZE,
-	.bDescriptorType	= USB_DT_INTERFACE,
-	.bInterfaceNumber	= UVC_INTF_VIDEO_STREAMING,
-	.bAlternateSetting	= 0,
-	.bNumEndpoints		= 0,
-	.bInterfaceClass	= USB_CLASS_VIDEO,
-	.bInterfaceSubClass	= UVC_SC_VIDEOSTREAMING,
-	.bInterfaceProtocol	= 0x00,
-	.iInterface		= 0,
-};
-
-static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
-	.bLength		= USB_DT_INTERFACE_SIZE,
-	.bDescriptorType	= USB_DT_INTERFACE,
-	.bInterfaceNumber	= UVC_INTF_VIDEO_STREAMING,
-	.bAlternateSetting	= 1,
-	.bNumEndpoints		= 1,
-	.bInterfaceClass	= USB_CLASS_VIDEO,
-	.bInterfaceSubClass	= UVC_SC_VIDEOSTREAMING,
-	.bInterfaceProtocol	= 0x00,
-	.iInterface		= 0,
-};
-
-static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
-	.bLength		= USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType	= USB_DT_ENDPOINT,
-	.bEndpointAddress	= USB_DIR_IN,
-	.bmAttributes		= USB_ENDPOINT_SYNC_ASYNC
-				| USB_ENDPOINT_XFER_ISOC,
-	/* The wMaxPacketSize and bInterval values will be initialized from
-	 * module parameters.
-	 */
-};
-
-static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
-	.bLength		= USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType	= USB_DT_ENDPOINT,
-	.bEndpointAddress	= USB_DIR_IN,
-	.bmAttributes		= USB_ENDPOINT_SYNC_ASYNC
-				| USB_ENDPOINT_XFER_ISOC,
-	/* The wMaxPacketSize and bInterval values will be initialized from
-	 * module parameters.
-	 */
-};
-
-static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
-	.bLength		= USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType	= USB_DT_ENDPOINT,
-
-	.bEndpointAddress	= USB_DIR_IN,
-	.bmAttributes		= USB_ENDPOINT_SYNC_ASYNC
-				| USB_ENDPOINT_XFER_ISOC,
-	/* The wMaxPacketSize and bInterval values will be initialized from
-	 * module parameters.
-	 */
-};
-
-static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp __initdata = {
-	.bLength		= sizeof(uvc_ss_streaming_comp),
-	.bDescriptorType	= USB_DT_SS_ENDPOINT_COMP,
-	/* The bMaxBurst, bmAttributes and wBytesPerInterval values will be
-	 * initialized from module parameters.
-	 */
-};
-
-static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
-	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
-	(struct usb_descriptor_header *) &uvc_fs_streaming_ep,
-	NULL,
-};
-
-static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
-	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
-	(struct usb_descriptor_header *) &uvc_hs_streaming_ep,
-	NULL,
-};
-
-static const struct usb_descriptor_header * const uvc_ss_streaming[] = {
-	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
-	(struct usb_descriptor_header *) &uvc_ss_streaming_ep,
-	(struct usb_descriptor_header *) &uvc_ss_streaming_comp,
-	NULL,
-};
-
-/* --------------------------------------------------------------------------
- * Control requests
- */
-
-static void
-uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req)
-{
-	struct uvc_device *uvc = req->context;
-	struct v4l2_event v4l2_event;
-	struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-
-	if (uvc->event_setup_out) {
-		uvc->event_setup_out = 0;
-
-		memset(&v4l2_event, 0, sizeof(v4l2_event));
-		v4l2_event.type = UVC_EVENT_DATA;
-		uvc_event->data.length = req->actual;
-		memcpy(&uvc_event->data.data, req->buf, req->actual);
-		v4l2_event_queue(uvc->vdev, &v4l2_event);
-	}
-}
-
-static int
-uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
-	struct uvc_device *uvc = to_uvc(f);
-	struct v4l2_event v4l2_event;
-	struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-
-	/* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n",
-	 *	ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue),
-	 *	le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength));
-	 */
-
-	if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
-		INFO(f->config->cdev, "invalid request type\n");
-		return -EINVAL;
-	}
-
-	/* Stall too big requests. */
-	if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
-		return -EINVAL;
-
-	memset(&v4l2_event, 0, sizeof(v4l2_event));
-	v4l2_event.type = UVC_EVENT_SETUP;
-	memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
-	v4l2_event_queue(uvc->vdev, &v4l2_event);
-
-	return 0;
-}
-
-void uvc_function_setup_continue(struct uvc_device *uvc)
-{
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
-
-	usb_composite_setup_continue(cdev);
-}
-
-static int
-uvc_function_get_alt(struct usb_function *f, unsigned interface)
-{
-	struct uvc_device *uvc = to_uvc(f);
-
-	INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface);
-
-	if (interface == uvc->control_intf)
-		return 0;
-	else if (interface != uvc->streaming_intf)
-		return -EINVAL;
-	else
-		return uvc->state == UVC_STATE_STREAMING ? 1 : 0;
-}
-
-static int
-uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
-{
-	struct uvc_device *uvc = to_uvc(f);
-	struct v4l2_event v4l2_event;
-	struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
-	int ret;
-
-	INFO(f->config->cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
-
-	if (interface == uvc->control_intf) {
-		if (alt)
-			return -EINVAL;
-
-		if (uvc->state == UVC_STATE_DISCONNECTED) {
-			memset(&v4l2_event, 0, sizeof(v4l2_event));
-			v4l2_event.type = UVC_EVENT_CONNECT;
-			uvc_event->speed = f->config->cdev->gadget->speed;
-			v4l2_event_queue(uvc->vdev, &v4l2_event);
-
-			uvc->state = UVC_STATE_CONNECTED;
-		}
-
-		return 0;
-	}
-
-	if (interface != uvc->streaming_intf)
-		return -EINVAL;
-
-	/* TODO
-	if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep))
-		return alt ? -EINVAL : 0;
-	*/
-
-	switch (alt) {
-	case 0:
-		if (uvc->state != UVC_STATE_STREAMING)
-			return 0;
-
-		if (uvc->video.ep)
-			usb_ep_disable(uvc->video.ep);
-
-		memset(&v4l2_event, 0, sizeof(v4l2_event));
-		v4l2_event.type = UVC_EVENT_STREAMOFF;
-		v4l2_event_queue(uvc->vdev, &v4l2_event);
-
-		uvc->state = UVC_STATE_CONNECTED;
-		return 0;
-
-	case 1:
-		if (uvc->state != UVC_STATE_CONNECTED)
-			return 0;
-
-		if (uvc->video.ep) {
-			ret = config_ep_by_speed(f->config->cdev->gadget,
-					&(uvc->func), uvc->video.ep);
-			if (ret)
-				return ret;
-			usb_ep_enable(uvc->video.ep);
-		}
-
-		memset(&v4l2_event, 0, sizeof(v4l2_event));
-		v4l2_event.type = UVC_EVENT_STREAMON;
-		v4l2_event_queue(uvc->vdev, &v4l2_event);
-		return USB_GADGET_DELAYED_STATUS;
-
-	default:
-		return -EINVAL;
-	}
-}
-
-static void
-uvc_function_disable(struct usb_function *f)
-{
-	struct uvc_device *uvc = to_uvc(f);
-	struct v4l2_event v4l2_event;
-
-	INFO(f->config->cdev, "uvc_function_disable\n");
-
-	memset(&v4l2_event, 0, sizeof(v4l2_event));
-	v4l2_event.type = UVC_EVENT_DISCONNECT;
-	v4l2_event_queue(uvc->vdev, &v4l2_event);
-
-	uvc->state = UVC_STATE_DISCONNECTED;
-}
-
-/* --------------------------------------------------------------------------
- * Connection / disconnection
- */
-
-void
-uvc_function_connect(struct uvc_device *uvc)
-{
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
-	int ret;
-
-	if ((ret = usb_function_activate(&uvc->func)) < 0)
-		INFO(cdev, "UVC connect failed with %d\n", ret);
-}
-
-void
-uvc_function_disconnect(struct uvc_device *uvc)
-{
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
-	int ret;
-
-	if ((ret = usb_function_deactivate(&uvc->func)) < 0)
-		INFO(cdev, "UVC disconnect failed with %d\n", ret);
-}
-
-/* --------------------------------------------------------------------------
- * USB probe and disconnect
- */
-
-static int
-uvc_register_video(struct uvc_device *uvc)
-{
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
-	struct video_device *video;
-
-	/* TODO reference counting. */
-	video = video_device_alloc();
-	if (video == NULL)
-		return -ENOMEM;
-
-	video->v4l2_dev = &uvc->v4l2_dev;
-	video->fops = &uvc_v4l2_fops;
-	video->release = video_device_release;
-	strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
-
-	uvc->vdev = video;
-	video_set_drvdata(video, uvc);
-
-	return video_register_device(video, VFL_TYPE_GRABBER, -1);
-}
-
-#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
-	do { \
-		memcpy(mem, desc, (desc)->bLength); \
-		*(dst)++ = mem; \
-		mem += (desc)->bLength; \
-	} while (0);
-
-#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
-	do { \
-		const struct usb_descriptor_header * const *__src; \
-		for (__src = src; *__src; ++__src) { \
-			memcpy(mem, *__src, (*__src)->bLength); \
-			*dst++ = mem; \
-			mem += (*__src)->bLength; \
-		} \
-	} while (0)
-
-static struct usb_descriptor_header ** __init
-uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
-{
-	struct uvc_input_header_descriptor *uvc_streaming_header;
-	struct uvc_header_descriptor *uvc_control_header;
-	const struct uvc_descriptor_header * const *uvc_control_desc;
-	const struct uvc_descriptor_header * const *uvc_streaming_cls;
-	const struct usb_descriptor_header * const *uvc_streaming_std;
-	const struct usb_descriptor_header * const *src;
-	struct usb_descriptor_header **dst;
-	struct usb_descriptor_header **hdr;
-	unsigned int control_size;
-	unsigned int streaming_size;
-	unsigned int n_desc;
-	unsigned int bytes;
-	void *mem;
-
-	switch (speed) {
-	case USB_SPEED_SUPER:
-		uvc_control_desc = uvc->desc.ss_control;
-		uvc_streaming_cls = uvc->desc.ss_streaming;
-		uvc_streaming_std = uvc_ss_streaming;
-		break;
-
-	case USB_SPEED_HIGH:
-		uvc_control_desc = uvc->desc.fs_control;
-		uvc_streaming_cls = uvc->desc.hs_streaming;
-		uvc_streaming_std = uvc_hs_streaming;
-		break;
-
-	case USB_SPEED_FULL:
-	default:
-		uvc_control_desc = uvc->desc.fs_control;
-		uvc_streaming_cls = uvc->desc.fs_streaming;
-		uvc_streaming_std = uvc_fs_streaming;
-		break;
-	}
-
-	/* Descriptors layout
-	 *
-	 * uvc_iad
-	 * uvc_control_intf
-	 * Class-specific UVC control descriptors
-	 * uvc_control_ep
-	 * uvc_control_cs_ep
-	 * uvc_ss_control_comp (for SS only)
-	 * uvc_streaming_intf_alt0
-	 * Class-specific UVC streaming descriptors
-	 * uvc_{fs|hs}_streaming
-	 */
-
-	/* Count descriptors and compute their size. */
-	control_size = 0;
-	streaming_size = 0;
-	bytes = uvc_iad.bLength + uvc_control_intf.bLength
-	      + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
-	      + uvc_streaming_intf_alt0.bLength;
-
-	if (speed == USB_SPEED_SUPER) {
-		bytes += uvc_ss_control_comp.bLength;
-		n_desc = 6;
-	} else {
-		n_desc = 5;
-	}
-
-	for (src = (const struct usb_descriptor_header **)uvc_control_desc;
-	     *src; ++src) {
-		control_size += (*src)->bLength;
-		bytes += (*src)->bLength;
-		n_desc++;
-	}
-	for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
-	     *src; ++src) {
-		streaming_size += (*src)->bLength;
-		bytes += (*src)->bLength;
-		n_desc++;
-	}
-	for (src = uvc_streaming_std; *src; ++src) {
-		bytes += (*src)->bLength;
-		n_desc++;
-	}
-
-	mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
-	if (mem == NULL)
-		return NULL;
-
-	hdr = mem;
-	dst = mem;
-	mem += (n_desc + 1) * sizeof(*src);
-
-	/* Copy the descriptors. */
-	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
-	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
-
-	uvc_control_header = mem;
-	UVC_COPY_DESCRIPTORS(mem, dst,
-		(const struct usb_descriptor_header **)uvc_control_desc);
-	uvc_control_header->wTotalLength = cpu_to_le16(control_size);
-	uvc_control_header->bInCollection = 1;
-	uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
-
-	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
-	if (speed == USB_SPEED_SUPER)
-		UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
-
-	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
-	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
-
-	uvc_streaming_header = mem;
-	UVC_COPY_DESCRIPTORS(mem, dst,
-		(const struct usb_descriptor_header**)uvc_streaming_cls);
-	uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
-	uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
-
-	UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
-
-	*dst = NULL;
-	return hdr;
-}
-
-static void
-uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
-{
-	struct usb_composite_dev *cdev = c->cdev;
-	struct uvc_device *uvc = to_uvc(f);
-
-	INFO(cdev, "uvc_function_unbind\n");
-
-	video_unregister_device(uvc->vdev);
-	v4l2_device_unregister(&uvc->v4l2_dev);
-	uvc->control_ep->driver_data = NULL;
-	uvc->video.ep->driver_data = NULL;
-
-	uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0;
-	usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
-	kfree(uvc->control_buf);
-
-	usb_free_all_descriptors(f);
-
-	kfree(uvc);
-}
-
-static int __init
-uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
-{
-	struct usb_composite_dev *cdev = c->cdev;
-	struct uvc_device *uvc = to_uvc(f);
-	unsigned int max_packet_mult;
-	unsigned int max_packet_size;
-	struct usb_ep *ep;
-	int ret = -EINVAL;
-
-	INFO(cdev, "uvc_function_bind\n");
-
-	/* Sanity check the streaming endpoint module parameters.
-	 */
-	streaming_interval = clamp(streaming_interval, 1U, 16U);
-	streaming_maxpacket = clamp(streaming_maxpacket, 1U, 3072U);
-	streaming_maxburst = min(streaming_maxburst, 15U);
-
-	/* Fill in the FS/HS/SS Video Streaming specific descriptors from the
-	 * module parameters.
-	 *
-	 * NOTE: We assume that the user knows what they are doing and won't
-	 * give parameters that their UDC doesn't support.
-	 */
-	if (streaming_maxpacket <= 1024) {
-		max_packet_mult = 1;
-		max_packet_size = streaming_maxpacket;
-	} else if (streaming_maxpacket <= 2048) {
-		max_packet_mult = 2;
-		max_packet_size = streaming_maxpacket / 2;
-	} else {
-		max_packet_mult = 3;
-		max_packet_size = streaming_maxpacket / 3;
-	}
-
-	uvc_fs_streaming_ep.wMaxPacketSize = min(streaming_maxpacket, 1023U);
-	uvc_fs_streaming_ep.bInterval = streaming_interval;
-
-	uvc_hs_streaming_ep.wMaxPacketSize = max_packet_size;
-	uvc_hs_streaming_ep.wMaxPacketSize |= ((max_packet_mult - 1) << 11);
-	uvc_hs_streaming_ep.bInterval = streaming_interval;
-
-	uvc_ss_streaming_ep.wMaxPacketSize = max_packet_size;
-	uvc_ss_streaming_ep.bInterval = streaming_interval;
-	uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
-	uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
-	uvc_ss_streaming_comp.wBytesPerInterval =
-		max_packet_size * max_packet_mult * streaming_maxburst;
-
-	/* Allocate endpoints. */
-	ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
-	if (!ep) {
-		INFO(cdev, "Unable to allocate control EP\n");
-		goto error;
-	}
-	uvc->control_ep = ep;
-	ep->driver_data = uvc;
-
-	if (gadget_is_superspeed(c->cdev->gadget))
-		ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
-					  &uvc_ss_streaming_comp);
-	else if (gadget_is_dualspeed(cdev->gadget))
-		ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
-	else
-		ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
-
-	if (!ep) {
-		INFO(cdev, "Unable to allocate streaming EP\n");
-		goto error;
-	}
-	uvc->video.ep = ep;
-	ep->driver_data = uvc;
-
-	uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
-	uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
-	uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
-
-	/* Allocate interface IDs. */
-	if ((ret = usb_interface_id(c, f)) < 0)
-		goto error;
-	uvc_iad.bFirstInterface = ret;
-	uvc_control_intf.bInterfaceNumber = ret;
-	uvc->control_intf = ret;
-
-	if ((ret = usb_interface_id(c, f)) < 0)
-		goto error;
-	uvc_streaming_intf_alt0.bInterfaceNumber = ret;
-	uvc_streaming_intf_alt1.bInterfaceNumber = ret;
-	uvc->streaming_intf = ret;
-
-	/* Copy descriptors */
-	f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
-	if (gadget_is_dualspeed(cdev->gadget))
-		f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
-	if (gadget_is_superspeed(c->cdev->gadget))
-		f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
-
-	/* Preallocate control endpoint request. */
-	uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
-	uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
-	if (uvc->control_req == NULL || uvc->control_buf == NULL) {
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	uvc->control_req->buf = uvc->control_buf;
-	uvc->control_req->complete = uvc_function_ep0_complete;
-	uvc->control_req->context = uvc;
-
-	/* Avoid letting this gadget enumerate until the userspace server is
-	 * active.
-	 */
-	if ((ret = usb_function_deactivate(f)) < 0)
-		goto error;
-
-	if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
-		printk(KERN_INFO "v4l2_device_register failed\n");
-		goto error;
-	}
-
-	/* Initialise video. */
-	ret = uvc_video_init(&uvc->video);
-	if (ret < 0)
-		goto error;
-
-	/* Register a V4L2 device. */
-	ret = uvc_register_video(uvc);
-	if (ret < 0) {
-		printk(KERN_INFO "Unable to register video device\n");
-		goto error;
-	}
-
-	return 0;
-
-error:
-	v4l2_device_unregister(&uvc->v4l2_dev);
-	if (uvc->vdev)
-		video_device_release(uvc->vdev);
-
-	if (uvc->control_ep)
-		uvc->control_ep->driver_data = NULL;
-	if (uvc->video.ep)
-		uvc->video.ep->driver_data = NULL;
-
-	if (uvc->control_req) {
-		usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
-		kfree(uvc->control_buf);
-	}
-
-	usb_free_all_descriptors(f);
-	return ret;
-}
-
-/* --------------------------------------------------------------------------
- * USB gadget function
- */
-
-/**
- * uvc_bind_config - add a UVC function to a configuration
- * @c: the configuration to support the UVC instance
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- *
- * Caller must have called @uvc_setup(). Caller is also responsible for
- * calling @uvc_cleanup() before module unload.
- */
-int __init
-uvc_bind_config(struct usb_configuration *c,
-		const struct uvc_descriptor_header * const *fs_control,
-		const struct uvc_descriptor_header * const *ss_control,
-		const struct uvc_descriptor_header * const *fs_streaming,
-		const struct uvc_descriptor_header * const *hs_streaming,
-		const struct uvc_descriptor_header * const *ss_streaming)
-{
-	struct uvc_device *uvc;
-	int ret = 0;
-
-	/* TODO Check if the USB device controller supports the required
-	 * features.
-	 */
-	if (!gadget_is_dualspeed(c->cdev->gadget))
-		return -EINVAL;
-
-	uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
-	if (uvc == NULL)
-		return -ENOMEM;
-
-	uvc->state = UVC_STATE_DISCONNECTED;
-
-	/* Validate the descriptors. */
-	if (fs_control == NULL || fs_control[0] == NULL ||
-	    fs_control[0]->bDescriptorSubType != UVC_VC_HEADER)
-		goto error;
-
-	if (ss_control == NULL || ss_control[0] == NULL ||
-	    ss_control[0]->bDescriptorSubType != UVC_VC_HEADER)
-		goto error;
-
-	if (fs_streaming == NULL || fs_streaming[0] == NULL ||
-	    fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
-		goto error;
-
-	if (hs_streaming == NULL || hs_streaming[0] == NULL ||
-	    hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
-		goto error;
-
-	if (ss_streaming == NULL || ss_streaming[0] == NULL ||
-	    ss_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
-		goto error;
-
-	uvc->desc.fs_control = fs_control;
-	uvc->desc.ss_control = ss_control;
-	uvc->desc.fs_streaming = fs_streaming;
-	uvc->desc.hs_streaming = hs_streaming;
-	uvc->desc.ss_streaming = ss_streaming;
-
-	/* String descriptors are global, we only need to allocate string IDs
-	 * for the first UVC function. UVC functions beyond the first (if any)
-	 * will reuse the same IDs.
-	 */
-	if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
-		ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
-		if (ret)
-			goto error;
-		uvc_iad.iFunction =
-			uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
-		uvc_control_intf.iInterface =
-			uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
-		ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;
-		uvc_streaming_intf_alt0.iInterface = ret;
-		uvc_streaming_intf_alt1.iInterface = ret;
-	}
-
-	/* Register the function. */
-	uvc->func.name = "uvc";
-	uvc->func.strings = uvc_function_strings;
-	uvc->func.bind = uvc_function_bind;
-	uvc->func.unbind = uvc_function_unbind;
-	uvc->func.get_alt = uvc_function_get_alt;
-	uvc->func.set_alt = uvc_function_set_alt;
-	uvc->func.disable = uvc_function_disable;
-	uvc->func.setup = uvc_function_setup;
-
-	ret = usb_add_function(c, &uvc->func);
-	if (ret)
-		kfree(uvc);
-
-	return ret;
-
-error:
-	kfree(uvc);
-	return ret;
-}
-
-module_param_named(trace, uvc_gadget_trace_param, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(trace, "Trace level bitmask");
-