drivers/usb/core/sysfs.c - maze/linux - Git at Google

 /*
  * drivers/usb/core/sysfs.c
  *
  * (C) Copyright 2002 David Brownell
  * (C) Copyright 2002,2004 Greg Kroah-Hartman
  * (C) Copyright 2002,2004 IBM Corp.
  *
  * All of the sysfs file attributes for usb devices and interfaces.
  *
  */


 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/usb.h>
 #include "usb.h"

 /* endpoint stuff */
 struct ep_object {
 	struct usb_endpoint_descriptor *desc;
 	struct usb_device *udev;
 	struct kobject kobj;
 };
 #define to_ep_object(_kobj) \
 	container_of(_kobj, struct ep_object, kobj)

 struct ep_attribute {
 	struct attribute attr;
 	ssize_t (*show)(struct usb_device *,
 			struct usb_endpoint_descriptor *, char *);
 };
 #define to_ep_attribute(_attr) \
 	container_of(_attr, struct ep_attribute, attr)

 #define EP_ATTR(_name)						\
 struct ep_attribute ep_##_name = {				\
 	.attr = {.name = #_name, .owner = THIS_MODULE,		\
 			.mode = S_IRUGO},			\
 	.show = show_ep_##_name}

 #define usb_ep_attr(field, format_string)			\
 static ssize_t show_ep_##field(struct usb_device *udev,		\
 		struct usb_endpoint_descriptor *desc, 		\
 		char *buf)					\
 {								\
 	return sprintf(buf, format_string, desc->field);	\
 }								\
 static EP_ATTR(field);

 usb_ep_attr(bLength, "%02x\n")
 usb_ep_attr(bEndpointAddress, "%02x\n")
 usb_ep_attr(bmAttributes, "%02x\n")
 usb_ep_attr(bInterval, "%02x\n")

 static ssize_t show_ep_wMaxPacketSize(struct usb_device *udev,
 		struct usb_endpoint_descriptor *desc, char *buf)
 {
 	return sprintf(buf, "%04x\n",
 			le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
 }
 static EP_ATTR(wMaxPacketSize);

 static ssize_t show_ep_type(struct usb_device *udev,
 		struct usb_endpoint_descriptor *desc, char *buf)
 {
 	char *type = "unknown";

 	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 	case USB_ENDPOINT_XFER_CONTROL:
 		type = "Control";
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
 		type = "Isoc";
 		break;
 	case USB_ENDPOINT_XFER_BULK:
 		type = "Bulk";
 		break;
 	case USB_ENDPOINT_XFER_INT:
 		type = "Interrupt";
 		break;
 	}
 	return sprintf(buf, "%s\n", type);
 }
 static EP_ATTR(type);

 static ssize_t show_ep_interval(struct usb_device *udev,
 		struct usb_endpoint_descriptor *desc, char *buf)
 {
 	char unit;
 	unsigned interval = 0;
 	unsigned in;

 	in = (desc->bEndpointAddress & USB_DIR_IN);

 	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 	case USB_ENDPOINT_XFER_CONTROL:
 		if (udev->speed == USB_SPEED_HIGH) 	/* uframes per NAK */
 			interval = desc->bInterval;
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
 		interval = 1 << (desc->bInterval - 1);
 		break;
 	case USB_ENDPOINT_XFER_BULK:
 		if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
 			interval = desc->bInterval;
 		break;
 	case USB_ENDPOINT_XFER_INT:
 		if (udev->speed == USB_SPEED_HIGH)
 			interval = 1 << (desc->bInterval - 1);
 		else
 			interval = desc->bInterval;
 		break;
 	}
 	interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
 	if (interval % 1000)
 		unit = 'u';
 	else {
 		unit = 'm';
 		interval /= 1000;
 	}

 	return sprintf(buf, "%d%cs\n", interval, unit);
 }
 static EP_ATTR(interval);

 static ssize_t show_ep_direction(struct usb_device *udev,
 		struct usb_endpoint_descriptor *desc, char *buf)
 {
 	char *direction;

 	if ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 			USB_ENDPOINT_XFER_CONTROL)
 		direction = "both";
 	else if (desc->bEndpointAddress & USB_DIR_IN)
 		direction = "in";
 	else
 		direction = "out";
 	return sprintf(buf, "%s\n", direction);
 }
 static EP_ATTR(direction);

 static struct attribute *ep_attrs[] = {
 	&ep_bLength.attr,
 	&ep_bEndpointAddress.attr,
 	&ep_bmAttributes.attr,
 	&ep_bInterval.attr,
 	&ep_wMaxPacketSize.attr,
 	&ep_type.attr,
 	&ep_interval.attr,
 	&ep_direction.attr,
 	NULL,
 };

 static void ep_object_release(struct kobject *kobj)
 {
 	kfree(to_ep_object(kobj));
 }

 static ssize_t ep_object_show(struct kobject *kobj, struct attribute *attr,
 		char *buf)
 {
 	struct ep_object *ep_obj = to_ep_object(kobj);
 	struct ep_attribute *ep_attr = to_ep_attribute(attr);

 	return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
 }

 static struct sysfs_ops ep_object_sysfs_ops = {
 	.show =			ep_object_show,
 };

 static struct kobj_type ep_object_ktype = {
 	.release =		ep_object_release,
 	.sysfs_ops =		&ep_object_sysfs_ops,
 	.default_attrs =	ep_attrs,
 };

 static void usb_create_ep_files(struct kobject *parent,
 		struct usb_host_endpoint *endpoint,
 		struct usb_device *udev)
 {
 	struct ep_object *ep_obj;
 	struct kobject *kobj;

 	ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
 	if (!ep_obj)
 		return;

 	ep_obj->desc = &endpoint->desc;
 	ep_obj->udev = udev;

 	kobj = &ep_obj->kobj;
 	kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
 	kobj->parent = parent;
 	kobj->ktype = &ep_object_ktype;

 	/* Don't use kobject_register, because it generates a hotplug event */
 	kobject_init(kobj);
 	if (kobject_add(kobj) == 0)
 		endpoint->kobj = kobj;
 	else
 		kobject_put(kobj);
 }

 static void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
 {

 	if (endpoint->kobj) {
 		kobject_del(endpoint->kobj);
 		kobject_put(endpoint->kobj);
 		endpoint->kobj = NULL;
 	}
 }

 /* Active configuration fields */
 #define usb_actconfig_show(field, multiplier, format_string)		\
 static ssize_t  show_##field (struct device *dev,			\
 		struct device_attribute *attr, char *buf)		\
 {									\
 	struct usb_device *udev;					\
 	struct usb_host_config *actconfig;				\
 									\
 	udev = to_usb_device (dev);					\
 	actconfig = udev->actconfig;					\
 	if (actconfig)							\
 		return sprintf (buf, format_string,			\
 				actconfig->desc.field * multiplier);	\
 	else								\
 		return 0;						\
 }									\

 #define usb_actconfig_attr(field, multiplier, format_string)		\
 usb_actconfig_show(field, multiplier, format_string)			\
 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

 usb_actconfig_attr (bNumInterfaces, 1, "%2d\n")
 usb_actconfig_attr (bmAttributes, 1, "%2x\n")
 usb_actconfig_attr (bMaxPower, 2, "%3dmA\n")

 static ssize_t show_configuration_string(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev;
 	struct usb_host_config *actconfig;

 	udev = to_usb_device (dev);
 	actconfig = udev->actconfig;
 	if ((!actconfig) || (!actconfig->string))
 		return 0;
 	return sprintf(buf, "%s\n", actconfig->string);
 }
 static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL);

 /* configuration value is always present, and r/w */
 usb_actconfig_show(bConfigurationValue, 1, "%u\n");

 static ssize_t
 set_bConfigurationValue (struct device *dev, struct device_attribute *attr,
 		const char *buf, size_t count)
 {
 	struct usb_device	*udev = udev = to_usb_device (dev);
 	int			config, value;

 	if (sscanf (buf, "%u", &config) != 1 || config > 255)
 		return -EINVAL;
 	usb_lock_device(udev);
 	value = usb_set_configuration (udev, config);
 	usb_unlock_device(udev);
 	return (value < 0) ? value : count;
 }

 static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR,
 		show_bConfigurationValue, set_bConfigurationValue);

 /* String fields */
 #define usb_string_attr(name)						\
 static ssize_t  show_##name(struct device *dev,				\
 		struct device_attribute *attr, char *buf)		\
 {									\
 	struct usb_device *udev;					\
 									\
 	udev = to_usb_device (dev);					\
 	return sprintf(buf, "%s\n", udev->name);			\
 }									\
 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);

 usb_string_attr(product);
 usb_string_attr(manufacturer);
 usb_string_attr(serial);

 static ssize_t
 show_speed (struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev;
 	char *speed;

 	udev = to_usb_device (dev);

 	switch (udev->speed) {
 	case USB_SPEED_LOW:
 		speed = "1.5";
 		break;
 	case USB_SPEED_UNKNOWN:
 	case USB_SPEED_FULL:
 		speed = "12";
 		break;
 	case USB_SPEED_HIGH:
 		speed = "480";
 		break;
 	default:
 		speed = "unknown";
 	}
 	return sprintf (buf, "%s\n", speed);
 }
 static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);

 static ssize_t
 show_devnum (struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev;

 	udev = to_usb_device (dev);
 	return sprintf (buf, "%d\n", udev->devnum);
 }
 static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);

 static ssize_t
 show_version (struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev;
 	u16 bcdUSB;

 	udev = to_usb_device(dev);
 	bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
 	return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
 }
 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);

 static ssize_t
 show_maxchild (struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev;

 	udev = to_usb_device (dev);
 	return sprintf (buf, "%d\n", udev->maxchild);
 }
 static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);

 /* Descriptor fields */
 #define usb_descriptor_attr_le16(field, format_string)			\
 static ssize_t								\
 show_##field (struct device *dev, struct device_attribute *attr,	\
 		char *buf)						\
 {									\
 	struct usb_device *udev;					\
 									\
 	udev = to_usb_device (dev);					\
 	return sprintf (buf, format_string, 				\
 			le16_to_cpu(udev->descriptor.field));		\
 }									\
 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

 usb_descriptor_attr_le16(idVendor, "%04x\n")
 usb_descriptor_attr_le16(idProduct, "%04x\n")
 usb_descriptor_attr_le16(bcdDevice, "%04x\n")

 #define usb_descriptor_attr(field, format_string)			\
 static ssize_t								\
 show_##field (struct device *dev, struct device_attribute *attr,	\
 		char *buf)						\
 {									\
 	struct usb_device *udev;					\
 									\
 	udev = to_usb_device (dev);					\
 	return sprintf (buf, format_string, udev->descriptor.field);	\
 }									\
 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

 usb_descriptor_attr (bDeviceClass, "%02x\n")
 usb_descriptor_attr (bDeviceSubClass, "%02x\n")
 usb_descriptor_attr (bDeviceProtocol, "%02x\n")
 usb_descriptor_attr (bNumConfigurations, "%d\n")
 usb_descriptor_attr (bMaxPacketSize0, "%d\n")

 static struct attribute *dev_attrs[] = {
 	/* current configuration's attributes */
 	&dev_attr_bNumInterfaces.attr,
 	&dev_attr_bConfigurationValue.attr,
 	&dev_attr_bmAttributes.attr,
 	&dev_attr_bMaxPower.attr,
 	/* device attributes */
 	&dev_attr_idVendor.attr,
 	&dev_attr_idProduct.attr,
 	&dev_attr_bcdDevice.attr,
 	&dev_attr_bDeviceClass.attr,
 	&dev_attr_bDeviceSubClass.attr,
 	&dev_attr_bDeviceProtocol.attr,
 	&dev_attr_bNumConfigurations.attr,
 	&dev_attr_bMaxPacketSize0.attr,
 	&dev_attr_speed.attr,
 	&dev_attr_devnum.attr,
 	&dev_attr_version.attr,
 	&dev_attr_maxchild.attr,
 	NULL,
 };
 static struct attribute_group dev_attr_grp = {
 	.attrs = dev_attrs,
 };

 void usb_create_sysfs_dev_files (struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;

 	sysfs_create_group(&dev->kobj, &dev_attr_grp);

 	if (udev->manufacturer)
 		device_create_file (dev, &dev_attr_manufacturer);
 	if (udev->product)
 		device_create_file (dev, &dev_attr_product);
 	if (udev->serial)
 		device_create_file (dev, &dev_attr_serial);
 	device_create_file (dev, &dev_attr_configuration);
 	usb_create_ep_files(&dev->kobj, &udev->ep0, udev);
 }

 void usb_remove_sysfs_dev_files (struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;

 	usb_remove_ep_files(&udev->ep0);
 	sysfs_remove_group(&dev->kobj, &dev_attr_grp);

 	if (udev->manufacturer)
 		device_remove_file(dev, &dev_attr_manufacturer);
 	if (udev->product)
 		device_remove_file(dev, &dev_attr_product);
 	if (udev->serial)
 		device_remove_file(dev, &dev_attr_serial);
 	device_remove_file (dev, &dev_attr_configuration);
 }

 /* Interface fields */
 #define usb_intf_attr(field, format_string)				\
 static ssize_t								\
 show_##field (struct device *dev, struct device_attribute *attr,	\
 		char *buf)						\
 {									\
 	struct usb_interface *intf = to_usb_interface (dev);		\
 									\
 	return sprintf (buf, format_string,				\
 			intf->cur_altsetting->desc.field); 		\
 }									\
 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

 usb_intf_attr (bInterfaceNumber, "%02x\n")
 usb_intf_attr (bAlternateSetting, "%2d\n")
 usb_intf_attr (bNumEndpoints, "%02x\n")
 usb_intf_attr (bInterfaceClass, "%02x\n")
 usb_intf_attr (bInterfaceSubClass, "%02x\n")
 usb_intf_attr (bInterfaceProtocol, "%02x\n")

 static ssize_t show_interface_string(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct usb_interface *intf;
 	struct usb_device *udev;
 	int len;

 	intf = to_usb_interface (dev);
 	udev = interface_to_usbdev (intf);
 	len = snprintf(buf, 256, "%s", intf->cur_altsetting->string);
 	if (len < 0)
 		return 0;
 	buf[len] = '\n';
 	buf[len+1] = 0;
 	return len+1;
 }
 static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);

 static ssize_t show_modalias(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct usb_interface *intf;
 	struct usb_device *udev;
 	struct usb_host_interface *alt;

 	intf = to_usb_interface(dev);
 	udev = interface_to_usbdev(intf);
 	alt = intf->cur_altsetting;

 	return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
 			"ic%02Xisc%02Xip%02X\n",
 			le16_to_cpu(udev->descriptor.idVendor),
 			le16_to_cpu(udev->descriptor.idProduct),
 			le16_to_cpu(udev->descriptor.bcdDevice),
 			udev->descriptor.bDeviceClass,
 			udev->descriptor.bDeviceSubClass,
 			udev->descriptor.bDeviceProtocol,
 			alt->desc.bInterfaceClass,
 			alt->desc.bInterfaceSubClass,
 			alt->desc.bInterfaceProtocol);
 }
 static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);

 static struct attribute *intf_attrs[] = {
 	&dev_attr_bInterfaceNumber.attr,
 	&dev_attr_bAlternateSetting.attr,
 	&dev_attr_bNumEndpoints.attr,
 	&dev_attr_bInterfaceClass.attr,
 	&dev_attr_bInterfaceSubClass.attr,
 	&dev_attr_bInterfaceProtocol.attr,
 	&dev_attr_modalias.attr,
 	NULL,
 };
 static struct attribute_group intf_attr_grp = {
 	.attrs = intf_attrs,
 };

 static inline void usb_create_intf_ep_files(struct usb_interface *intf,
 		struct usb_device *udev)
 {
 	struct usb_host_interface *iface_desc;
 	int i;

 	iface_desc = intf->cur_altsetting;
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
 		usb_create_ep_files(&intf->dev.kobj, &iface_desc->endpoint[i],
 				udev);
 }

 static inline void usb_remove_intf_ep_files(struct usb_interface *intf)
 {
 	struct usb_host_interface *iface_desc;
 	int i;

 	iface_desc = intf->cur_altsetting;
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
 		usb_remove_ep_files(&iface_desc->endpoint[i]);
 }

 void usb_create_sysfs_intf_files (struct usb_interface *intf)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct usb_host_interface *alt = intf->cur_altsetting;

 	sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);

 	if (alt->string == NULL)
 		alt->string = usb_cache_string(udev, alt->desc.iInterface);
 	if (alt->string)
 		device_create_file(&intf->dev, &dev_attr_interface);
 	usb_create_intf_ep_files(intf, udev);
 }

 void usb_remove_sysfs_intf_files (struct usb_interface *intf)
 {
 	usb_remove_intf_ep_files(intf);
 	sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp);

 	if (intf->cur_altsetting->string)
 		device_remove_file(&intf->dev, &dev_attr_interface);
 }
	/*
	* drivers/usb/core/sysfs.c
	*
	* (C) Copyright 2002 David Brownell
	* (C) Copyright 2002,2004 Greg Kroah-Hartman
	* (C) Copyright 2002,2004 IBM Corp.
	*
	* All of the sysfs file attributes for usb devices and interfaces.
	*
	*/


	#include <linux/config.h>
	#include <linux/kernel.h>
	#include <linux/usb.h>
	#include "usb.h"

	/* endpoint stuff */
	struct ep_object {
	struct usb_endpoint_descriptor *desc;
	struct usb_device *udev;
	struct kobject kobj;
	};
	#define to_ep_object(_kobj) \
	container_of(_kobj, struct ep_object, kobj)

	struct ep_attribute {
	struct attribute attr;
	ssize_t (show)(struct usb_device ,
	struct usb_endpoint_descriptor , char );
	};
	#define to_ep_attribute(_attr) \
	container_of(_attr, struct ep_attribute, attr)

	#define EP_ATTR(_name) \
	struct ep_attribute ep_##_name = { \
	.attr = {.name = #_name, .owner = THIS_MODULE, \
	.mode = S_IRUGO}, \
	.show = show_ep_##_name}

	#define usb_ep_attr(field, format_string) \
	static ssize_t show_ep_##field(struct usb_device *udev, \
	struct usb_endpoint_descriptor *desc, \
	char *buf) \
	{ \
	return sprintf(buf, format_string, desc->field); \
	} \
	static EP_ATTR(field);

	usb_ep_attr(bLength, "%02x\n")
	usb_ep_attr(bEndpointAddress, "%02x\n")
	usb_ep_attr(bmAttributes, "%02x\n")
	usb_ep_attr(bInterval, "%02x\n")

	static ssize_t show_ep_wMaxPacketSize(struct usb_device *udev,
	struct usb_endpoint_descriptor desc, char buf)
	{
	return sprintf(buf, "%04x\n",
	le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
	}
	static EP_ATTR(wMaxPacketSize);

	static ssize_t show_ep_type(struct usb_device *udev,
	struct usb_endpoint_descriptor desc, char buf)
	{
	char *type = "unknown";

	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
	case USB_ENDPOINT_XFER_CONTROL:
	type = "Control";
	break;
	case USB_ENDPOINT_XFER_ISOC:
	type = "Isoc";
	break;
	case USB_ENDPOINT_XFER_BULK:
	type = "Bulk";
	break;
	case USB_ENDPOINT_XFER_INT:
	type = "Interrupt";
	break;
	}
	return sprintf(buf, "%s\n", type);
	}
	static EP_ATTR(type);

	static ssize_t show_ep_interval(struct usb_device *udev,
	struct usb_endpoint_descriptor desc, char buf)
	{
	char unit;
	unsigned interval = 0;
	unsigned in;

	in = (desc->bEndpointAddress & USB_DIR_IN);

	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
	case USB_ENDPOINT_XFER_CONTROL:
	if (udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
	interval = desc->bInterval;
	break;
	case USB_ENDPOINT_XFER_ISOC:
	interval = 1 << (desc->bInterval - 1);
	break;
	case USB_ENDPOINT_XFER_BULK:
	if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
	interval = desc->bInterval;
	break;
	case USB_ENDPOINT_XFER_INT:
	if (udev->speed == USB_SPEED_HIGH)
	interval = 1 << (desc->bInterval - 1);
	else
	interval = desc->bInterval;
	break;
	}
	interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
	if (interval % 1000)
	unit = 'u';
	else {
	unit = 'm';
	interval /= 1000;
	}

	return sprintf(buf, "%d%cs\n", interval, unit);
	}
	static EP_ATTR(interval);

	static ssize_t show_ep_direction(struct usb_device *udev,
	struct usb_endpoint_descriptor desc, char buf)
	{
	char *direction;

	if ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
	USB_ENDPOINT_XFER_CONTROL)
	direction = "both";
	else if (desc->bEndpointAddress & USB_DIR_IN)
	direction = "in";
	else
	direction = "out";
	return sprintf(buf, "%s\n", direction);
	}
	static EP_ATTR(direction);

	static struct attribute *ep_attrs[] = {
	&ep_bLength.attr,
	&ep_bEndpointAddress.attr,
	&ep_bmAttributes.attr,
	&ep_bInterval.attr,
	&ep_wMaxPacketSize.attr,
	&ep_type.attr,
	&ep_interval.attr,
	&ep_direction.attr,
	NULL,
	};

	static void ep_object_release(struct kobject *kobj)
	{
	kfree(to_ep_object(kobj));
	}

	static ssize_t ep_object_show(struct kobject kobj, struct attribute attr,
	char *buf)
	{
	struct ep_object *ep_obj = to_ep_object(kobj);
	struct ep_attribute *ep_attr = to_ep_attribute(attr);

	return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
	}

	static struct sysfs_ops ep_object_sysfs_ops = {
	.show = ep_object_show,
	};

	static struct kobj_type ep_object_ktype = {
	.release = ep_object_release,
	.sysfs_ops = &ep_object_sysfs_ops,
	.default_attrs = ep_attrs,
	};

	static void usb_create_ep_files(struct kobject *parent,
	struct usb_host_endpoint *endpoint,
	struct usb_device *udev)
	{
	struct ep_object *ep_obj;
	struct kobject *kobj;

	ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
	if (!ep_obj)
	return;

	ep_obj->desc = &endpoint->desc;
	ep_obj->udev = udev;

	kobj = &ep_obj->kobj;
	kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
	kobj->parent = parent;
	kobj->ktype = &ep_object_ktype;

	/* Don't use kobject_register, because it generates a hotplug event */
	kobject_init(kobj);
	if (kobject_add(kobj) == 0)
	endpoint->kobj = kobj;
	else
	kobject_put(kobj);
	}

	static void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
	{

	if (endpoint->kobj) {
	kobject_del(endpoint->kobj);
	kobject_put(endpoint->kobj);
	endpoint->kobj = NULL;
	}
	}

	/* Active configuration fields */
	#define usb_actconfig_show(field, multiplier, format_string) \
	static ssize_t show_##field (struct device *dev, \
	struct device_attribute attr, char buf) \
	{ \
	struct usb_device *udev; \
	struct usb_host_config *actconfig; \
	\
	udev = to_usb_device (dev); \
	actconfig = udev->actconfig; \
	if (actconfig) \
	return sprintf (buf, format_string, \
	actconfig->desc.field * multiplier); \
	else \
	return 0; \
	} \

	#define usb_actconfig_attr(field, multiplier, format_string) \
	usb_actconfig_show(field, multiplier, format_string) \
	static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

	usb_actconfig_attr (bNumInterfaces, 1, "%2d\n")
	usb_actconfig_attr (bmAttributes, 1, "%2x\n")
	usb_actconfig_attr (bMaxPower, 2, "%3dmA\n")

	static ssize_t show_configuration_string(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct usb_device *udev;
	struct usb_host_config *actconfig;

	udev = to_usb_device (dev);
	actconfig = udev->actconfig;
	if ((!actconfig) \|\| (!actconfig->string))
	return 0;
	return sprintf(buf, "%s\n", actconfig->string);
	}
	static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL);

	/* configuration value is always present, and r/w */
	usb_actconfig_show(bConfigurationValue, 1, "%u\n");

	static ssize_t
	set_bConfigurationValue (struct device dev, struct device_attribute attr,
	const char *buf, size_t count)
	{
	struct usb_device *udev = udev = to_usb_device (dev);
	int config, value;

	if (sscanf (buf, "%u", &config) != 1 \|\| config > 255)
	return -EINVAL;
	usb_lock_device(udev);
	value = usb_set_configuration (udev, config);
	usb_unlock_device(udev);
	return (value < 0) ? value : count;
	}

	static DEVICE_ATTR(bConfigurationValue, S_IRUGO \| S_IWUSR,
	show_bConfigurationValue, set_bConfigurationValue);

	/* String fields */
	#define usb_string_attr(name) \
	static ssize_t show_##name(struct device *dev, \
	struct device_attribute attr, char buf) \
	{ \
	struct usb_device *udev; \
	\
	udev = to_usb_device (dev); \
	return sprintf(buf, "%s\n", udev->name); \
	} \
	static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);

	usb_string_attr(product);
	usb_string_attr(manufacturer);
	usb_string_attr(serial);

	static ssize_t
	show_speed (struct device dev, struct device_attribute attr, char *buf)
	{
	struct usb_device *udev;
	char *speed;

	udev = to_usb_device (dev);

	switch (udev->speed) {
	case USB_SPEED_LOW:
	speed = "1.5";
	break;
	case USB_SPEED_UNKNOWN:
	case USB_SPEED_FULL:
	speed = "12";
	break;
	case USB_SPEED_HIGH:
	speed = "480";
	break;
	default:
	speed = "unknown";
	}
	return sprintf (buf, "%s\n", speed);
	}
	static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);

	static ssize_t
	show_devnum (struct device dev, struct device_attribute attr, char *buf)
	{
	struct usb_device *udev;

	udev = to_usb_device (dev);
	return sprintf (buf, "%d\n", udev->devnum);
	}
	static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);

	static ssize_t
	show_version (struct device dev, struct device_attribute attr, char *buf)
	{
	struct usb_device *udev;
	u16 bcdUSB;

	udev = to_usb_device(dev);
	bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
	return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
	}
	static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);

	static ssize_t
	show_maxchild (struct device dev, struct device_attribute attr, char *buf)
	{
	struct usb_device *udev;

	udev = to_usb_device (dev);
	return sprintf (buf, "%d\n", udev->maxchild);
	}
	static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);

	/* Descriptor fields */
	#define usb_descriptor_attr_le16(field, format_string) \
	static ssize_t \
	show_##field (struct device dev, struct device_attribute attr, \
	char *buf) \
	{ \
	struct usb_device *udev; \
	\
	udev = to_usb_device (dev); \
	return sprintf (buf, format_string, \
	le16_to_cpu(udev->descriptor.field)); \
	} \
	static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

	usb_descriptor_attr_le16(idVendor, "%04x\n")
	usb_descriptor_attr_le16(idProduct, "%04x\n")
	usb_descriptor_attr_le16(bcdDevice, "%04x\n")

	#define usb_descriptor_attr(field, format_string) \
	static ssize_t \
	show_##field (struct device dev, struct device_attribute attr, \
	char *buf) \
	{ \
	struct usb_device *udev; \
	\
	udev = to_usb_device (dev); \
	return sprintf (buf, format_string, udev->descriptor.field); \
	} \
	static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

	usb_descriptor_attr (bDeviceClass, "%02x\n")
	usb_descriptor_attr (bDeviceSubClass, "%02x\n")
	usb_descriptor_attr (bDeviceProtocol, "%02x\n")
	usb_descriptor_attr (bNumConfigurations, "%d\n")
	usb_descriptor_attr (bMaxPacketSize0, "%d\n")

	static struct attribute *dev_attrs[] = {
	/* current configuration's attributes */
	&dev_attr_bNumInterfaces.attr,
	&dev_attr_bConfigurationValue.attr,
	&dev_attr_bmAttributes.attr,
	&dev_attr_bMaxPower.attr,
	/* device attributes */
	&dev_attr_idVendor.attr,
	&dev_attr_idProduct.attr,
	&dev_attr_bcdDevice.attr,
	&dev_attr_bDeviceClass.attr,
	&dev_attr_bDeviceSubClass.attr,
	&dev_attr_bDeviceProtocol.attr,
	&dev_attr_bNumConfigurations.attr,
	&dev_attr_bMaxPacketSize0.attr,
	&dev_attr_speed.attr,
	&dev_attr_devnum.attr,
	&dev_attr_version.attr,
	&dev_attr_maxchild.attr,
	NULL,
	};
	static struct attribute_group dev_attr_grp = {
	.attrs = dev_attrs,
	};

	void usb_create_sysfs_dev_files (struct usb_device *udev)
	{
	struct device *dev = &udev->dev;

	sysfs_create_group(&dev->kobj, &dev_attr_grp);

	if (udev->manufacturer)
	device_create_file (dev, &dev_attr_manufacturer);
	if (udev->product)
	device_create_file (dev, &dev_attr_product);
	if (udev->serial)
	device_create_file (dev, &dev_attr_serial);
	device_create_file (dev, &dev_attr_configuration);
	usb_create_ep_files(&dev->kobj, &udev->ep0, udev);
	}

	void usb_remove_sysfs_dev_files (struct usb_device *udev)
	{
	struct device *dev = &udev->dev;

	usb_remove_ep_files(&udev->ep0);
	sysfs_remove_group(&dev->kobj, &dev_attr_grp);

	if (udev->manufacturer)
	device_remove_file(dev, &dev_attr_manufacturer);
	if (udev->product)
	device_remove_file(dev, &dev_attr_product);
	if (udev->serial)
	device_remove_file(dev, &dev_attr_serial);
	device_remove_file (dev, &dev_attr_configuration);
	}

	/* Interface fields */
	#define usb_intf_attr(field, format_string) \
	static ssize_t \
	show_##field (struct device dev, struct device_attribute attr, \
	char *buf) \
	{ \
	struct usb_interface *intf = to_usb_interface (dev); \
	\
	return sprintf (buf, format_string, \
	intf->cur_altsetting->desc.field); \
	} \
	static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);

	usb_intf_attr (bInterfaceNumber, "%02x\n")
	usb_intf_attr (bAlternateSetting, "%2d\n")
	usb_intf_attr (bNumEndpoints, "%02x\n")
	usb_intf_attr (bInterfaceClass, "%02x\n")
	usb_intf_attr (bInterfaceSubClass, "%02x\n")
	usb_intf_attr (bInterfaceProtocol, "%02x\n")

	static ssize_t show_interface_string(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct usb_interface *intf;
	struct usb_device *udev;
	int len;

	intf = to_usb_interface (dev);
	udev = interface_to_usbdev (intf);
	len = snprintf(buf, 256, "%s", intf->cur_altsetting->string);
	if (len < 0)
	return 0;
	buf[len] = '\n';
	buf[len+1] = 0;
	return len+1;
	}
	static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);

	static ssize_t show_modalias(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct usb_interface *intf;
	struct usb_device *udev;
	struct usb_host_interface *alt;

	intf = to_usb_interface(dev);
	udev = interface_to_usbdev(intf);
	alt = intf->cur_altsetting;

	return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
	"ic%02Xisc%02Xip%02X\n",
	le16_to_cpu(udev->descriptor.idVendor),
	le16_to_cpu(udev->descriptor.idProduct),
	le16_to_cpu(udev->descriptor.bcdDevice),
	udev->descriptor.bDeviceClass,
	udev->descriptor.bDeviceSubClass,
	udev->descriptor.bDeviceProtocol,
	alt->desc.bInterfaceClass,
	alt->desc.bInterfaceSubClass,
	alt->desc.bInterfaceProtocol);
	}
	static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);

	static struct attribute *intf_attrs[] = {
	&dev_attr_bInterfaceNumber.attr,
	&dev_attr_bAlternateSetting.attr,
	&dev_attr_bNumEndpoints.attr,
	&dev_attr_bInterfaceClass.attr,
	&dev_attr_bInterfaceSubClass.attr,
	&dev_attr_bInterfaceProtocol.attr,
	&dev_attr_modalias.attr,
	NULL,
	};
	static struct attribute_group intf_attr_grp = {
	.attrs = intf_attrs,
	};

	static inline void usb_create_intf_ep_files(struct usb_interface *intf,
	struct usb_device *udev)
	{
	struct usb_host_interface *iface_desc;
	int i;

	iface_desc = intf->cur_altsetting;
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
	usb_create_ep_files(&intf->dev.kobj, &iface_desc->endpoint[i],
	udev);
	}

	static inline void usb_remove_intf_ep_files(struct usb_interface *intf)
	{
	struct usb_host_interface *iface_desc;
	int i;

	iface_desc = intf->cur_altsetting;
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
	usb_remove_ep_files(&iface_desc->endpoint[i]);
	}

	void usb_create_sysfs_intf_files (struct usb_interface *intf)
	{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct usb_host_interface *alt = intf->cur_altsetting;

	sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);

	if (alt->string == NULL)
	alt->string = usb_cache_string(udev, alt->desc.iInterface);
	if (alt->string)
	device_create_file(&intf->dev, &dev_attr_interface);
	usb_create_intf_ep_files(intf, udev);
	}

	void usb_remove_sysfs_intf_files (struct usb_interface *intf)
	{
	usb_remove_intf_ep_files(intf);
	sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp);

	if (intf->cur_altsetting->string)
	device_remove_file(&intf->dev, &dev_attr_interface);
	}