[deliverable/linux.git] / drivers / usb / gadget / f_uvc.c

/*
 *	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/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;

/* --------------------------------------------------------------------------
 * Function descriptors
 */

/* string IDs are assigned dynamically */

#define UVC_STRING_ASSOCIATION_IDX		0
#define UVC_STRING_CONTROL_IDX			1
#define UVC_STRING_STREAMING_IDX		2

static struct usb_string uvc_en_us_strings[] = {
	[UVC_STRING_ASSOCIATION_IDX].s = "UVC Camera",
	[UVC_STRING_CONTROL_IDX].s = "Video Control",
	[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

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(16),
	.bInterval		= 8,
};

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(16),
};

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_streaming_ep = {
	.bLength		= USB_DT_ENDPOINT_SIZE,
	.bDescriptorType	= USB_DT_ENDPOINT,
	.bEndpointAddress	= USB_DIR_IN,
	.bmAttributes		= USB_ENDPOINT_XFER_ISOC,
	.wMaxPacketSize		= cpu_to_le16(512),
	.bInterval		= 1,
};

static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
	(struct usb_descriptor_header *) &uvc_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_streaming_ep,
	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;
}

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;

	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;
		break;

	case 1:
		if (uvc->state != UVC_STATE_CONNECTED)
			return 0;

		if (uvc->video.ep) {
			uvc->video.ep->desc = &uvc_streaming_ep;
			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);

		uvc->state = UVC_STATE_STREAMING;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

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->parent = &cdev->gadget->dev;
	video->minor = -1;
	video->fops = &uvc_v4l2_fops;
	video->release = video_device_release;
	strncpy(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_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;

	uvc_streaming_cls = (speed == USB_SPEED_FULL)
			  ? uvc->desc.fs_streaming : uvc->desc.hs_streaming;
	uvc_streaming_std = (speed == USB_SPEED_FULL)
			  ? uvc_fs_streaming : uvc_hs_streaming;

	/* Descriptors layout
	 *
	 * uvc_iad
	 * uvc_control_intf
	 * Class-specific UVC control descriptors
	 * uvc_control_ep
	 * uvc_control_cs_ep
	 * 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;
	n_desc = 5;

	for (src = (const struct usb_descriptor_header**)uvc->desc.control; *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->desc.control);
	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);
	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_streaming_ep.bEndpointAddress;

	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");

	if (uvc->vdev) {
		if (uvc->vdev->minor == -1)
			video_device_release(uvc->vdev);
		else
			video_unregister_device(uvc->vdev);
		uvc->vdev = NULL;
	}

	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);
	}

	kfree(f->descriptors);
	kfree(f->hs_descriptors);

	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);
	struct usb_ep *ep;
	int ret = -EINVAL;

	INFO(cdev, "uvc_function_bind\n");

	/* 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;

	ep = usb_ep_autoconfig(cdev->gadget, &uvc_streaming_ep);
	if (!ep) {
		INFO(cdev, "Unable to allocate streaming EP\n");
		goto error;
	}
	uvc->video.ep = ep;
	ep->driver_data = uvc;

	/* 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->descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
	f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);

	/* 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;

	/* 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:
	uvc_function_unbind(c, 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 *control,
		const struct uvc_descriptor_header * const *fs_streaming,
		const struct uvc_descriptor_header * const *hs_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 (control == NULL || control[0] == NULL ||
	    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;

	uvc->desc.control = control;
	uvc->desc.fs_streaming = fs_streaming;
	uvc->desc.hs_streaming = hs_streaming;

	/* Allocate string descriptor numbers. */
	if ((ret = usb_string_id(c->cdev)) < 0)
		goto error;
	uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id = ret;
	uvc_iad.iFunction = ret;

	if ((ret = usb_string_id(c->cdev)) < 0)
		goto error;
	uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = ret;
	uvc_control_intf.iInterface = ret;

	if ((ret = usb_string_id(c->cdev)) < 0)
		goto error;
	uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id = ret;
	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");
Commit	Line	Data
cdda479f LP	1	/*
	2	* uvc_gadget.c -- USB Video Class Gadget driver
	3	*
	4	* Copyright (C) 2009-2010
	5	* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/device.h>
	16	#include <linux/errno.h>
	17	#include <linux/fs.h>
	18	#include <linux/list.h>
	19	#include <linux/mutex.h>
	20	#include <linux/usb/ch9.h>
	21	#include <linux/usb/gadget.h>
	22	#include <linux/usb/video.h>
	23	#include <linux/vmalloc.h>
	24	#include <linux/wait.h>
	25
	26	#include <media/v4l2-dev.h>
	27	#include <media/v4l2-event.h>
	28
	29	#include "uvc.h"
	30
5d9955f8	31	unsigned int uvc_gadget_trace_param;
cdda479f LP	32
	33	/* --------------------------------------------------------------------------
	34	* Function descriptors
	35	*/
	36
	37	/* string IDs are assigned dynamically */
	38
	39	#define UVC_STRING_ASSOCIATION_IDX 0
	40	#define UVC_STRING_CONTROL_IDX 1
	41	#define UVC_STRING_STREAMING_IDX 2
	42
	43	static struct usb_string uvc_en_us_strings[] = {
	44	[UVC_STRING_ASSOCIATION_IDX].s = "UVC Camera",
	45	[UVC_STRING_CONTROL_IDX].s = "Video Control",
	46	[UVC_STRING_STREAMING_IDX].s = "Video Streaming",
	47	{ }
	48	};
	49
	50	static struct usb_gadget_strings uvc_stringtab = {
	51	.language = 0x0409, /* en-us */
	52	.strings = uvc_en_us_strings,
	53	};
	54
	55	static struct usb_gadget_strings *uvc_function_strings[] = {
	56	&uvc_stringtab,
	57	NULL,
	58	};
	59
	60	#define UVC_INTF_VIDEO_CONTROL 0
	61	#define UVC_INTF_VIDEO_STREAMING 1
	62
	63	static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
bbafc0cb	64	.bLength = sizeof(uvc_iad),
cdda479f LP	65	.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
	66	.bFirstInterface = 0,
	67	.bInterfaceCount = 2,
	68	.bFunctionClass = USB_CLASS_VIDEO,
bbafc0cb	69	.bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION,
cdda479f LP	70	.bFunctionProtocol = 0x00,
	71	.iFunction = 0,
	72	};
	73
	74	static struct usb_interface_descriptor uvc_control_intf __initdata = {
	75	.bLength = USB_DT_INTERFACE_SIZE,
	76	.bDescriptorType = USB_DT_INTERFACE,
	77	.bInterfaceNumber = UVC_INTF_VIDEO_CONTROL,
	78	.bAlternateSetting = 0,
	79	.bNumEndpoints = 1,
	80	.bInterfaceClass = USB_CLASS_VIDEO,
bbafc0cb	81	.bInterfaceSubClass = UVC_SC_VIDEOCONTROL,
cdda479f LP	82	.bInterfaceProtocol = 0x00,
	83	.iInterface = 0,
	84	};
	85
	86	static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
	87	.bLength = USB_DT_ENDPOINT_SIZE,
	88	.bDescriptorType = USB_DT_ENDPOINT,
	89	.bEndpointAddress = USB_DIR_IN,
	90	.bmAttributes = USB_ENDPOINT_XFER_INT,
	91	.wMaxPacketSize = cpu_to_le16(16),
	92	.bInterval = 8,
	93	};
	94
	95	static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
	96	.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
	97	.bDescriptorType = USB_DT_CS_ENDPOINT,
	98	.bDescriptorSubType = UVC_EP_INTERRUPT,
	99	.wMaxTransferSize = cpu_to_le16(16),
	100	};
	101
	102	static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
	103	.bLength = USB_DT_INTERFACE_SIZE,
	104	.bDescriptorType = USB_DT_INTERFACE,
	105	.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
	106	.bAlternateSetting = 0,
	107	.bNumEndpoints = 0,
	108	.bInterfaceClass = USB_CLASS_VIDEO,
bbafc0cb	109	.bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
cdda479f LP	110	.bInterfaceProtocol = 0x00,
	111	.iInterface = 0,
	112	};
	113
	114	static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
	115	.bLength = USB_DT_INTERFACE_SIZE,
	116	.bDescriptorType = USB_DT_INTERFACE,
	117	.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
	118	.bAlternateSetting = 1,
	119	.bNumEndpoints = 1,
	120	.bInterfaceClass = USB_CLASS_VIDEO,
bbafc0cb	121	.bInterfaceSubClass = UVC_SC_VIDEOSTREAMING,
cdda479f LP	122	.bInterfaceProtocol = 0x00,
	123	.iInterface = 0,
	124	};
	125
	126	static struct usb_endpoint_descriptor uvc_streaming_ep = {
	127	.bLength = USB_DT_ENDPOINT_SIZE,
	128	.bDescriptorType = USB_DT_ENDPOINT,
	129	.bEndpointAddress = USB_DIR_IN,
	130	.bmAttributes = USB_ENDPOINT_XFER_ISOC,
	131	.wMaxPacketSize = cpu_to_le16(512),
	132	.bInterval = 1,
	133	};
	134
	135	static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
	136	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
	137	(struct usb_descriptor_header *) &uvc_streaming_ep,
	138	NULL,
	139	};
	140
	141	static const struct usb_descriptor_header * const uvc_hs_streaming[] = {
	142	(struct usb_descriptor_header *) &uvc_streaming_intf_alt1,
	143	(struct usb_descriptor_header *) &uvc_streaming_ep,
	144	NULL,
	145	};
	146
	147	/* --------------------------------------------------------------------------
	148	* Control requests
	149	*/
	150
	151	static void
	152	uvc_function_ep0_complete(struct usb_ep ep, struct usb_request req)
	153	{
	154	struct uvc_device *uvc = req->context;
	155	struct v4l2_event v4l2_event;
	156	struct uvc_event uvc_event = (void )&v4l2_event.u.data;
	157
	158	if (uvc->event_setup_out) {
	159	uvc->event_setup_out = 0;
	160
	161	memset(&v4l2_event, 0, sizeof(v4l2_event));
	162	v4l2_event.type = UVC_EVENT_DATA;
	163	uvc_event->data.length = req->actual;
	164	memcpy(&uvc_event->data.data, req->buf, req->actual);
	165	v4l2_event_queue(uvc->vdev, &v4l2_event);
	166	}
	167	}
	168
	169	static int
	170	uvc_function_setup(struct usb_function f, const struct usb_ctrlrequest ctrl)
	171	{
	172	struct uvc_device *uvc = to_uvc(f);
	173	struct v4l2_event v4l2_event;
	174	struct uvc_event uvc_event = (void )&v4l2_event.u.data;
	175
	176	/* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n",
	177	* ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue),
	178	* le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength));
	179	*/
	180
	181	if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
	182	INFO(f->config->cdev, "invalid request type\n");
	183	return -EINVAL;
	184	}
	185
186	/* Stall too big requests. */
187	if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE)
188	return -EINVAL;
189
190	memset(&v4l2_event, 0, sizeof(v4l2_event));
191	v4l2_event.type = UVC_EVENT_SETUP;
192	memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
193	v4l2_event_queue(uvc->vdev, &v4l2_event);
194
195	return 0;
196	}
197
198	static int
199	uvc_function_get_alt(struct usb_function *f, unsigned interface)
200	{
201	struct uvc_device *uvc = to_uvc(f);
202
203	INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface);
204
205	if (interface == uvc->control_intf)
206	return 0;
207	else if (interface != uvc->streaming_intf)
208	return -EINVAL;
209	else
210	return uvc->state == UVC_STATE_STREAMING ? 1 : 0;
211	}
212
213	static int
214	uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
215	{
216	struct uvc_device *uvc = to_uvc(f);
217	struct v4l2_event v4l2_event;
218	struct uvc_event uvc_event = (void )&v4l2_event.u.data;
219
220	INFO(f->config->cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
221
222	if (interface == uvc->control_intf) {
223	if (alt)
224	return -EINVAL;
225
226	if (uvc->state == UVC_STATE_DISCONNECTED) {
227	memset(&v4l2_event, 0, sizeof(v4l2_event));
228	v4l2_event.type = UVC_EVENT_CONNECT;
229	uvc_event->speed = f->config->cdev->gadget->speed;
230	v4l2_event_queue(uvc->vdev, &v4l2_event);
231
232	uvc->state = UVC_STATE_CONNECTED;
233	}
234
235	return 0;
236	}
237
238	if (interface != uvc->streaming_intf)
239	return -EINVAL;
240
241	/* TODO
242	if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep))
243	return alt ? -EINVAL : 0;
244	*/
245
246	switch (alt) {
247	case 0:
248	if (uvc->state != UVC_STATE_STREAMING)
249	return 0;
250
251	if (uvc->video.ep)
252	usb_ep_disable(uvc->video.ep);
253
254	memset(&v4l2_event, 0, sizeof(v4l2_event));
255	v4l2_event.type = UVC_EVENT_STREAMOFF;
256	v4l2_event_queue(uvc->vdev, &v4l2_event);
257
258	uvc->state = UVC_STATE_CONNECTED;
259	break;
260
261	case 1:
262	if (uvc->state != UVC_STATE_CONNECTED)
263	return 0;
264
72c973dd TB	265	if (uvc->video.ep) {
	266	uvc->video.ep->desc = &uvc_streaming_ep;
	267	usb_ep_enable(uvc->video.ep);
	268	}
cdda479f LP	269
	270	memset(&v4l2_event, 0, sizeof(v4l2_event));
	271	v4l2_event.type = UVC_EVENT_STREAMON;
	272	v4l2_event_queue(uvc->vdev, &v4l2_event);
	273
	274	uvc->state = UVC_STATE_STREAMING;
	275	break;
	276
	277	default:
	278	return -EINVAL;
	279	}
	280
	281	return 0;
	282	}
	283
	284	static void
	285	uvc_function_disable(struct usb_function *f)
	286	{
	287	struct uvc_device *uvc = to_uvc(f);
	288	struct v4l2_event v4l2_event;
	289
	290	INFO(f->config->cdev, "uvc_function_disable\n");
	291
	292	memset(&v4l2_event, 0, sizeof(v4l2_event));
	293	v4l2_event.type = UVC_EVENT_DISCONNECT;
	294	v4l2_event_queue(uvc->vdev, &v4l2_event);
	295
	296	uvc->state = UVC_STATE_DISCONNECTED;
	297	}
	298
	299	/* --------------------------------------------------------------------------
	300	* Connection / disconnection
	301	*/
	302
	303	void
	304	uvc_function_connect(struct uvc_device *uvc)
	305	{
	306	struct usb_composite_dev *cdev = uvc->func.config->cdev;
	307	int ret;
	308
	309	if ((ret = usb_function_activate(&uvc->func)) < 0)
	310	INFO(cdev, "UVC connect failed with %d\n", ret);
	311	}
	312
	313	void
	314	uvc_function_disconnect(struct uvc_device *uvc)
	315	{
	316	struct usb_composite_dev *cdev = uvc->func.config->cdev;
	317	int ret;
	318
	319	if ((ret = usb_function_deactivate(&uvc->func)) < 0)
	320	INFO(cdev, "UVC disconnect failed with %d\n", ret);
	321	}
	322
	323	/* --------------------------------------------------------------------------
	324	* USB probe and disconnect
	325	*/
	326
	327	static int
	328	uvc_register_video(struct uvc_device *uvc)
	329	{
	330	struct usb_composite_dev *cdev = uvc->func.config->cdev;
	331	struct video_device *video;
	332
333	/* TODO reference counting. */
334	video = video_device_alloc();
335	if (video == NULL)
336	return -ENOMEM;
337
338	video->parent = &cdev->gadget->dev;
339	video->minor = -1;
340	video->fops = &uvc_v4l2_fops;
341	video->release = video_device_release;
342	strncpy(video->name, cdev->gadget->name, sizeof(video->name));
343
344	uvc->vdev = video;
345	video_set_drvdata(video, uvc);
346
347	return video_register_device(video, VFL_TYPE_GRABBER, -1);
348	}
349
350	#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
351	do { \
352	memcpy(mem, desc, (desc)->bLength); \
353	*(dst)++ = mem; \
354	mem += (desc)->bLength; \
355	} while (0);
356
357	#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
358	do { \
359	const struct usb_descriptor_header * const *__src; \
360	for (__src = src; *__src; ++__src) { \
361	memcpy(mem, __src, (__src)->bLength); \
362	*dst++ = mem; \
363	mem += (*__src)->bLength; \
364	} \
365	} while (0)
366
367	static struct usb_descriptor_header ** __init
368	uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
369	{
370	struct uvc_input_header_descriptor *uvc_streaming_header;
371	struct uvc_header_descriptor *uvc_control_header;
372	const struct uvc_descriptor_header * const *uvc_streaming_cls;
373	const struct usb_descriptor_header * const *uvc_streaming_std;
374	const struct usb_descriptor_header * const *src;
375	struct usb_descriptor_header **dst;
376	struct usb_descriptor_header **hdr;
377	unsigned int control_size;
378	unsigned int streaming_size;
379	unsigned int n_desc;
380	unsigned int bytes;
381	void *mem;
382
383	uvc_streaming_cls = (speed == USB_SPEED_FULL)
384	? uvc->desc.fs_streaming : uvc->desc.hs_streaming;
385	uvc_streaming_std = (speed == USB_SPEED_FULL)
386	? uvc_fs_streaming : uvc_hs_streaming;
387
388	/* Descriptors layout
389	*
390	* uvc_iad
391	* uvc_control_intf
392	* Class-specific UVC control descriptors
393	* uvc_control_ep
394	* uvc_control_cs_ep
395	* uvc_streaming_intf_alt0
396	* Class-specific UVC streaming descriptors
397	* uvc_{fs\|hs}_streaming
398	*/
399
400	/* Count descriptors and compute their size. */
401	control_size = 0;
402	streaming_size = 0;
403	bytes = uvc_iad.bLength + uvc_control_intf.bLength
404	+ uvc_control_ep.bLength + uvc_control_cs_ep.bLength
405	+ uvc_streaming_intf_alt0.bLength;
406	n_desc = 5;
407
408	for (src = (const struct usb_descriptor_header*)uvc->desc.control; src; ++src) {
409	control_size += (*src)->bLength;
410	bytes += (*src)->bLength;
411	n_desc++;
412	}
413	for (src = (const struct usb_descriptor_header*)uvc_streaming_cls; src; ++src) {
414	streaming_size += (*src)->bLength;
415	bytes += (*src)->bLength;
416	n_desc++;
417	}
418	for (src = uvc_streaming_std; *src; ++src) {
419	bytes += (*src)->bLength;
420	n_desc++;
421	}
422
423	mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
424	if (mem == NULL)
425	return NULL;
426
427	hdr = mem;
428	dst = mem;
429	mem += (n_desc + 1) * sizeof(*src);
430
431	/* Copy the descriptors. */
432	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
433	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
434
435	uvc_control_header = mem;
436	UVC_COPY_DESCRIPTORS(mem, dst,
437	(const struct usb_descriptor_header**)uvc->desc.control);
438	uvc_control_header->wTotalLength = cpu_to_le16(control_size);
439	uvc_control_header->bInCollection = 1;
440	uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
441
442	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
443	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
444	UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
445
446	uvc_streaming_header = mem;
447	UVC_COPY_DESCRIPTORS(mem, dst,
448	(const struct usb_descriptor_header**)uvc_streaming_cls);
449	uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
450	uvc_streaming_header->bEndpointAddress = uvc_streaming_ep.bEndpointAddress;
451
452	UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
453
454	*dst = NULL;
455	return hdr;
456	}
457
458	static void
459	uvc_function_unbind(struct usb_configuration c, struct usb_function f)
460	{
461	struct usb_composite_dev *cdev = c->cdev;
462	struct uvc_device *uvc = to_uvc(f);
463
464	INFO(cdev, "uvc_function_unbind\n");
465
466	if (uvc->vdev) {
467	if (uvc->vdev->minor == -1)
468	video_device_release(uvc->vdev);
469	else
470	video_unregister_device(uvc->vdev);
471	uvc->vdev = NULL;
472	}
473
474	if (uvc->control_ep)
475	uvc->control_ep->driver_data = NULL;
476	if (uvc->video.ep)
477	uvc->video.ep->driver_data = NULL;
478
479	if (uvc->control_req) {
480	usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
481	kfree(uvc->control_buf);
482	}
483
484	kfree(f->descriptors);
485	kfree(f->hs_descriptors);
486
487	kfree(uvc);
488	}
489
490	static int __init
491	uvc_function_bind(struct usb_configuration c, struct usb_function f)
492	{
493	struct usb_composite_dev *cdev = c->cdev;
494	struct uvc_device *uvc = to_uvc(f);
495	struct usb_ep *ep;
496	int ret = -EINVAL;
497
498	INFO(cdev, "uvc_function_bind\n");
499
500	/* Allocate endpoints. */
501	ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
502	if (!ep) {
503	INFO(cdev, "Unable to allocate control EP\n");
504	goto error;
505	}
506	uvc->control_ep = ep;
507	ep->driver_data = uvc;
508
509	ep = usb_ep_autoconfig(cdev->gadget, &uvc_streaming_ep);
510	if (!ep) {
511	INFO(cdev, "Unable to allocate streaming EP\n");
512	goto error;
513	}
514	uvc->video.ep = ep;
515	ep->driver_data = uvc;
516
517	/* Allocate interface IDs. */
518	if ((ret = usb_interface_id(c, f)) < 0)
519	goto error;
520	uvc_iad.bFirstInterface = ret;
521	uvc_control_intf.bInterfaceNumber = ret;
522	uvc->control_intf = ret;
523
524	if ((ret = usb_interface_id(c, f)) < 0)
525	goto error;
526	uvc_streaming_intf_alt0.bInterfaceNumber = ret;
527	uvc_streaming_intf_alt1.bInterfaceNumber = ret;
528	uvc->streaming_intf = ret;
529
530	/* Copy descriptors. */
531	f->descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
532	f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
533
534	/* Preallocate control endpoint request. */
535	uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
536	uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
537	if (uvc->control_req == NULL \|\| uvc->control_buf == NULL) {
538	ret = -ENOMEM;
539	goto error;
540	}
541
542	uvc->control_req->buf = uvc->control_buf;
543	uvc->control_req->complete = uvc_function_ep0_complete;
544	uvc->control_req->context = uvc;
545
546	/* Avoid letting this gadget enumerate until the userspace server is
547	* active.
548	*/
549	if ((ret = usb_function_deactivate(f)) < 0)
550	goto error;
551
552	/* Initialise video. */
553	ret = uvc_video_init(&uvc->video);
554	if (ret < 0)
555	goto error;
556
557	/* Register a V4L2 device. */
558	ret = uvc_register_video(uvc);
559	if (ret < 0) {
560	printk(KERN_INFO "Unable to register video device\n");
561	goto error;
562	}
563
564	return 0;
565
566	error:
567	uvc_function_unbind(c, f);
568	return ret;
569	}
570
571	/* --------------------------------------------------------------------------
572	* USB gadget function
573	*/
574
575	/**
576	* uvc_bind_config - add a UVC function to a configuration
577	* @c: the configuration to support the UVC instance
578	* Context: single threaded during gadget setup
579	*
580	* Returns zero on success, else negative errno.
581	*
582	* Caller must have called @uvc_setup(). Caller is also responsible for
583	* calling @uvc_cleanup() before module unload.
584	*/
585	int __init
586	uvc_bind_config(struct usb_configuration *c,
587	const struct uvc_descriptor_header * const *control,
588	const struct uvc_descriptor_header * const *fs_streaming,
589	const struct uvc_descriptor_header * const *hs_streaming)
590	{
591	struct uvc_device *uvc;
592	int ret = 0;
593
594	/* TODO Check if the USB device controller supports the required
595	* features.
596	*/
597	if (!gadget_is_dualspeed(c->cdev->gadget))
598	return -EINVAL;
599
600	uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
601	if (uvc == NULL)
602	return -ENOMEM;
603
604	uvc->state = UVC_STATE_DISCONNECTED;
605
606	/* Validate the descriptors. */
607	if (control == NULL \|\| control[0] == NULL \|\|
bbafc0cb	608	control[0]->bDescriptorSubType != UVC_VC_HEADER)
cdda479f LP	609	goto error;
	610
	611	if (fs_streaming == NULL \|\| fs_streaming[0] == NULL \|\|
bbafc0cb	612	fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
cdda479f LP	613	goto error;
	614
	615	if (hs_streaming == NULL \|\| hs_streaming[0] == NULL \|\|
bbafc0cb	616	hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
cdda479f LP	617	goto error;
	618
	619	uvc->desc.control = control;
	620	uvc->desc.fs_streaming = fs_streaming;
	621	uvc->desc.hs_streaming = hs_streaming;
	622
	623	/* Allocate string descriptor numbers. */
	624	if ((ret = usb_string_id(c->cdev)) < 0)
	625	goto error;
	626	uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id = ret;
	627	uvc_iad.iFunction = ret;
	628
	629	if ((ret = usb_string_id(c->cdev)) < 0)
	630	goto error;
	631	uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = ret;
	632	uvc_control_intf.iInterface = ret;
	633
	634	if ((ret = usb_string_id(c->cdev)) < 0)
	635	goto error;
	636	uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id = ret;
	637	uvc_streaming_intf_alt0.iInterface = ret;
	638	uvc_streaming_intf_alt1.iInterface = ret;
	639
	640	/* Register the function. */
	641	uvc->func.name = "uvc";
	642	uvc->func.strings = uvc_function_strings;
	643	uvc->func.bind = uvc_function_bind;
	644	uvc->func.unbind = uvc_function_unbind;
	645	uvc->func.get_alt = uvc_function_get_alt;
	646	uvc->func.set_alt = uvc_function_set_alt;
	647	uvc->func.disable = uvc_function_disable;
	648	uvc->func.setup = uvc_function_setup;
	649
	650	ret = usb_add_function(c, &uvc->func);
	651	if (ret)
	652	kfree(uvc);
	653
28f75f4d	654	return ret;
cdda479f LP	655
	656	error:
	657	kfree(uvc);
	658	return ret;
	659	}
	660
5d9955f8	661	module_param_named(trace, uvc_gadget_trace_param, uint, S_IRUGO\|S_IWUSR);
cdda479f LP	662	MODULE_PARM_DESC(trace, "Trace level bitmask");
cdda479f LP	663