1 files changed, 780 insertions, 347 deletions

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index edd83e01445..1236c6011c7 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -10,392 +10,687 @@
  */
 
 
-#include <linux/config.h>
 #include <linux/kernel.h>
-
-#ifdef CONFIG_USB_DEBUG
-	#define DEBUG
-#else
-	#undef DEBUG
-#endif
+#include <linux/string.h>
 #include <linux/usb.h>
-
+#include <linux/usb/quirks.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)
+/* Active configuration fields */
+#define usb_actconfig_show(field, format_string)			\
+static ssize_t field##_show(struct device *dev,				\
+			    struct device_attribute *attr, char *buf)	\
+{									\
+	struct usb_device *udev;					\
+	struct usb_host_config *actconfig;				\
+	ssize_t rc = 0;							\
+									\
+	udev = to_usb_device(dev);					\
+	usb_lock_device(udev);						\
+	actconfig = udev->actconfig;					\
+	if (actconfig)							\
+		rc = sprintf(buf, format_string,			\
+				actconfig->desc.field);			\
+	usb_unlock_device(udev);					\
+	return rc;							\
+}									\
 
-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 usb_actconfig_attr(field, format_string)		\
+	usb_actconfig_show(field, format_string)		\
+	static DEVICE_ATTR_RO(field)
 
-#define EP_ATTR(_name)						\
-struct ep_attribute ep_##_name = {				\
-	.attr = {.name = #_name, .owner = THIS_MODULE,		\
-			.mode = S_IRUGO},			\
-	.show = show_ep_##_name}
+usb_actconfig_attr(bNumInterfaces, "%2d\n");
+usb_actconfig_attr(bmAttributes, "%2x\n");
 
-#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);
+static ssize_t bMaxPower_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct usb_device *udev;
+	struct usb_host_config *actconfig;
+	ssize_t rc = 0;
 
-usb_ep_attr(bLength, "%02x\n")
-usb_ep_attr(bEndpointAddress, "%02x\n")
-usb_ep_attr(bmAttributes, "%02x\n")
-usb_ep_attr(bInterval, "%02x\n")
+	udev = to_usb_device(dev);
+	usb_lock_device(udev);
+	actconfig = udev->actconfig;
+	if (actconfig)
+		rc = sprintf(buf, "%dmA\n", usb_get_max_power(udev, actconfig));
+	usb_unlock_device(udev);
+	return rc;
+}
+static DEVICE_ATTR_RO(bMaxPower);
 
-static ssize_t show_ep_wMaxPacketSize(struct usb_device *udev,
-		struct usb_endpoint_descriptor *desc, char *buf)
+static ssize_t configuration_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "%04x\n",
-			le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
+	struct usb_device *udev;
+	struct usb_host_config *actconfig;
+	ssize_t rc = 0;
+
+	udev = to_usb_device(dev);
+	usb_lock_device(udev);
+	actconfig = udev->actconfig;
+	if (actconfig && actconfig->string)
+		rc = sprintf(buf, "%s\n", actconfig->string);
+	usb_unlock_device(udev);
+	return rc;
 }
-static EP_ATTR(wMaxPacketSize);
+static DEVICE_ATTR_RO(configuration);
 
-static ssize_t show_ep_type(struct usb_device *udev,
-		struct usb_endpoint_descriptor *desc, char *buf)
+/* configuration value is always present, and r/w */
+usb_actconfig_show(bConfigurationValue, "%u\n");
+
+static ssize_t bConfigurationValue_store(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
 {
-	char *type = "unknown";
+	struct usb_device	*udev = to_usb_device(dev);
+	int			config, value;
 
-	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);
+	if (sscanf(buf, "%d", &config) != 1 || 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 EP_ATTR(type);
+static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR,
+		bConfigurationValue_show, bConfigurationValue_store);
 
-static ssize_t show_ep_interval(struct usb_device *udev,
-		struct usb_endpoint_descriptor *desc, char *buf)
+/* String fields */
+#define usb_string_attr(name)						\
+static ssize_t  name##_show(struct device *dev,				\
+		struct device_attribute *attr, char *buf)		\
+{									\
+	struct usb_device *udev;					\
+	int retval;							\
+									\
+	udev = to_usb_device(dev);					\
+	usb_lock_device(udev);						\
+	retval = sprintf(buf, "%s\n", udev->name);			\
+	usb_unlock_device(udev);					\
+	return retval;							\
+}									\
+static DEVICE_ATTR_RO(name)
+
+usb_string_attr(product);
+usb_string_attr(manufacturer);
+usb_string_attr(serial);
+
+static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
 {
-	char unit;
-	unsigned interval = 0;
-	unsigned in;
+	struct usb_device *udev;
+	char *speed;
 
-	in = (desc->bEndpointAddress & USB_DIR_IN);
+	udev = to_usb_device(dev);
 
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
-	case USB_ENDPOINT_XFER_CONTROL:
-		if (udev->speed == USB_SPEED_HIGH) 	/* uframes per NAK */
-			interval = desc->bInterval;
+	switch (udev->speed) {
+	case USB_SPEED_LOW:
+		speed = "1.5";
+		break;
+	case USB_SPEED_UNKNOWN:
+	case USB_SPEED_FULL:
+		speed = "12";
 		break;
-	case USB_ENDPOINT_XFER_ISOC:
-		interval = 1 << (desc->bInterval - 1);
+	case USB_SPEED_HIGH:
+		speed = "480";
 		break;
-	case USB_ENDPOINT_XFER_BULK:
-		if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
-			interval = desc->bInterval;
+	case USB_SPEED_WIRELESS:
+		speed = "480";
 		break;
-	case USB_ENDPOINT_XFER_INT:
-		if (udev->speed == USB_SPEED_HIGH)
-			interval = 1 << (desc->bInterval - 1);
-		else
-			interval = desc->bInterval;
+	case USB_SPEED_SUPER:
+		speed = "5000";
 		break;
+	default:
+		speed = "unknown";
 	}
-	interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
-	if (interval % 1000)
-		unit = 'u';
-	else {
-		unit = 'm';
-		interval /= 1000;
-	}
+	return sprintf(buf, "%s\n", speed);
+}
+static DEVICE_ATTR_RO(speed);
 
-	return sprintf(buf, "%d%cs\n", interval, unit);
+static ssize_t busnum_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
+{
+	struct usb_device *udev;
+
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", udev->bus->busnum);
 }
-static EP_ATTR(interval);
+static DEVICE_ATTR_RO(busnum);
 
-static ssize_t show_ep_direction(struct usb_device *udev,
-		struct usb_endpoint_descriptor *desc, char *buf)
+static ssize_t devnum_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
 {
-	char *direction;
+	struct usb_device *udev;
 
-	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,
-};
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", udev->devnum);
+}
+static DEVICE_ATTR_RO(devnum);
 
-static void ep_object_release(struct kobject *kobj)
+static ssize_t devpath_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
 {
-	kfree(to_ep_object(kobj));
+	struct usb_device *udev;
+
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%s\n", udev->devpath);
 }
+static DEVICE_ATTR_RO(devpath);
 
-static ssize_t ep_object_show(struct kobject *kobj, struct attribute *attr,
-		char *buf)
+static ssize_t version_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
 {
-	struct ep_object *ep_obj = to_ep_object(kobj);
-	struct ep_attribute *ep_attr = to_ep_attribute(attr);
+	struct usb_device *udev;
+	u16 bcdUSB;
 
-	return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
+	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_RO(version);
 
-static struct sysfs_ops ep_object_sysfs_ops = {
-	.show =			ep_object_show,
-};
+static ssize_t maxchild_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct usb_device *udev;
 
-static struct kobj_type ep_object_ktype = {
-	.release =		ep_object_release,
-	.sysfs_ops =		&ep_object_sysfs_ops,
-	.default_attrs =	ep_attrs,
-};
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", udev->maxchild);
+}
+static DEVICE_ATTR_RO(maxchild);
 
-static void usb_create_ep_files(struct kobject *parent,
-		struct usb_host_endpoint *endpoint,
-		struct usb_device *udev)
+static ssize_t quirks_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
 {
-	struct ep_object *ep_obj;
-	struct kobject *kobj;
+	struct usb_device *udev;
 
-	ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
-	if (!ep_obj)
-		return;
+	udev = to_usb_device(dev);
+	return sprintf(buf, "0x%x\n", udev->quirks);
+}
+static DEVICE_ATTR_RO(quirks);
 
-	ep_obj->desc = &endpoint->desc;
-	ep_obj->udev = udev;
+static ssize_t avoid_reset_quirk_show(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct usb_device *udev;
+
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET));
+}
 
-	kobj = &ep_obj->kobj;
-	kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
-	kobj->parent = parent;
-	kobj->ktype = &ep_object_ktype;
+static ssize_t avoid_reset_quirk_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct usb_device	*udev = to_usb_device(dev);
+	int			val;
 
-	/* Don't use kobject_register, because it generates a hotplug event */
-	kobject_init(kobj);
-	if (kobject_add(kobj) == 0)
-		endpoint->kobj = kobj;
+	if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1)
+		return -EINVAL;
+	usb_lock_device(udev);
+	if (val)
+		udev->quirks |= USB_QUIRK_RESET;
 	else
-		kobject_put(kobj);
+		udev->quirks &= ~USB_QUIRK_RESET;
+	usb_unlock_device(udev);
+	return count;
 }
+static DEVICE_ATTR_RW(avoid_reset_quirk);
 
-static void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
+static ssize_t urbnum_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
 {
+	struct usb_device *udev;
+
+	udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", atomic_read(&udev->urbnum));
+}
+static DEVICE_ATTR_RO(urbnum);
+
+static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct usb_device *udev;
+	char *state;
 
-	if (endpoint->kobj) {
-		kobject_del(endpoint->kobj);
-		kobject_put(endpoint->kobj);
-		endpoint->kobj = NULL;
+	udev = to_usb_device(dev);
+
+	switch (udev->removable) {
+	case USB_DEVICE_REMOVABLE:
+		state = "removable";
+		break;
+	case USB_DEVICE_FIXED:
+		state = "fixed";
+		break;
+	default:
+		state = "unknown";
 	}
+
+	return sprintf(buf, "%s\n", state);
 }
+static DEVICE_ATTR_RO(removable);
 
-/* 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;						\
-}									\
+static ssize_t ltm_capable_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	if (usb_device_supports_ltm(to_usb_device(dev)))
+		return sprintf(buf, "%s\n", "yes");
+	return sprintf(buf, "%s\n", "no");
+}
+static DEVICE_ATTR_RO(ltm_capable);
 
-#define usb_actconfig_attr(field, multiplier, format_string)		\
-usb_actconfig_show(field, multiplier, format_string)			\
-static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
+#ifdef	CONFIG_PM
 
-usb_actconfig_attr (bNumInterfaces, 1, "%2d\n")
-usb_actconfig_attr (bmAttributes, 1, "%2x\n")
-usb_actconfig_attr (bMaxPower, 2, "%3dmA\n")
+static ssize_t persist_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
 
-static ssize_t show_configuration_string(struct device *dev,
-		struct device_attribute *attr, char *buf)
+	return sprintf(buf, "%d\n", udev->persist_enabled);
+}
+
+static ssize_t persist_store(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
 {
-	struct usb_device *udev;
-	struct usb_host_config *actconfig;
+	struct usb_device *udev = to_usb_device(dev);
+	int value;
 
-	udev = to_usb_device (dev);
-	actconfig = udev->actconfig;
-	if ((!actconfig) || (!actconfig->string))
-		return 0;
-	return sprintf(buf, "%s\n", actconfig->string);
+	/* Hubs are always enabled for USB_PERSIST */
+	if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+		return -EPERM;
+
+	if (sscanf(buf, "%d", &value) != 1)
+		return -EINVAL;
+
+	usb_lock_device(udev);
+	udev->persist_enabled = !!value;
+	usb_unlock_device(udev);
+	return count;
 }
-static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL);
+static DEVICE_ATTR_RW(persist);
 
-/* configuration value is always present, and r/w */
-usb_actconfig_show(bConfigurationValue, 1, "%u\n");
+static int add_persist_attributes(struct device *dev)
+{
+	int rc = 0;
+
+	if (is_usb_device(dev)) {
+		struct usb_device *udev = to_usb_device(dev);
+
+		/* Hubs are automatically enabled for USB_PERSIST,
+		 * no point in creating the attribute file.
+		 */
+		if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
+			rc = sysfs_add_file_to_group(&dev->kobj,
+					&dev_attr_persist.attr,
+					power_group_name);
+	}
+	return rc;
+}
 
-static ssize_t
-set_bConfigurationValue (struct device *dev, struct device_attribute *attr,
-		const char *buf, size_t count)
+static void remove_persist_attributes(struct device *dev)
 {
-	struct usb_device	*udev = udev = to_usb_device (dev);
-	int			config, value;
+	sysfs_remove_file_from_group(&dev->kobj,
+			&dev_attr_persist.attr,
+			power_group_name);
+}
+#else
+
+#define add_persist_attributes(dev)	0
+#define remove_persist_attributes(dev)	do {} while (0)
+
+#endif	/* CONFIG_PM */
+
+#ifdef	CONFIG_PM_RUNTIME
+
+static ssize_t connected_duration_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+
+	return sprintf(buf, "%u\n",
+			jiffies_to_msecs(jiffies - udev->connect_time));
+}
+static DEVICE_ATTR_RO(connected_duration);
+
+/*
+ * If the device is resumed, the last time the device was suspended has
+ * been pre-subtracted from active_duration.  We add the current time to
+ * get the duration that the device was actually active.
+ *
+ * If the device is suspended, the active_duration is up-to-date.
+ */
+static ssize_t active_duration_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	int duration;
+
+	if (udev->state != USB_STATE_SUSPENDED)
+		duration = jiffies_to_msecs(jiffies + udev->active_duration);
+	else
+		duration = jiffies_to_msecs(udev->active_duration);
+	return sprintf(buf, "%u\n", duration);
+}
+static DEVICE_ATTR_RO(active_duration);
+
+static ssize_t autosuspend_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000);
+}
+
+static ssize_t autosuspend_store(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	int value;
 
-	if (sscanf (buf, "%u", &config) != 1 || config > 255)
+	if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 ||
+			value <= -INT_MAX/1000)
 		return -EINVAL;
+
+	pm_runtime_set_autosuspend_delay(dev, value * 1000);
+	return count;
+}
+static DEVICE_ATTR_RW(autosuspend);
+
+static const char on_string[] = "on";
+static const char auto_string[] = "auto";
+
+static void warn_level(void)
+{
+	static int level_warned;
+
+	if (!level_warned) {
+		level_warned = 1;
+		printk(KERN_WARNING "WARNING! power/level is deprecated; "
+				"use power/control instead\n");
+	}
+}
+
+static ssize_t level_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	const char *p = auto_string;
+
+	warn_level();
+	if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto)
+		p = on_string;
+	return sprintf(buf, "%s\n", p);
+}
+
+static ssize_t level_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	int len = count;
+	char *cp;
+	int rc = count;
+
+	warn_level();
+	cp = memchr(buf, '\n', count);
+	if (cp)
+		len = cp - buf;
+
 	usb_lock_device(udev);
-	value = usb_set_configuration (udev, config);
+
+	if (len == sizeof on_string - 1 &&
+			strncmp(buf, on_string, len) == 0)
+		usb_disable_autosuspend(udev);
+
+	else if (len == sizeof auto_string - 1 &&
+			strncmp(buf, auto_string, len) == 0)
+		usb_enable_autosuspend(udev);
+
+	else
+		rc = -EINVAL;
+
 	usb_unlock_device(udev);
-	return (value < 0) ? value : count;
+	return rc;
 }
+static DEVICE_ATTR_RW(level);
 
-static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, 
-		show_bConfigurationValue, set_bConfigurationValue);
+static ssize_t usb2_hardware_lpm_show(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	const char *p;
 
-/* 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);
+	if (udev->usb2_hw_lpm_allowed == 1)
+		p = "enabled";
+	else
+		p = "disabled";
 
-usb_string_attr(product);
-usb_string_attr(manufacturer);
-usb_string_attr(serial);
+	return sprintf(buf, "%s\n", p);
+}
 
-static ssize_t
-show_speed (struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t usb2_hardware_lpm_store(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t count)
 {
-	struct usb_device *udev;
-	char *speed;
+	struct usb_device *udev = to_usb_device(dev);
+	bool value;
+	int ret;
 
-	udev = to_usb_device (dev);
+	usb_lock_device(udev);
 
-	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";
+	ret = strtobool(buf, &value);
+
+	if (!ret) {
+		udev->usb2_hw_lpm_allowed = value;
+		ret = usb_set_usb2_hardware_lpm(udev, value);
 	}
-	return sprintf (buf, "%s\n", speed);
+
+	usb_unlock_device(udev);
+
+	if (!ret)
+		return count;
+
+	return ret;
 }
-static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);
+static DEVICE_ATTR_RW(usb2_hardware_lpm);
 
-static ssize_t
-show_devnum (struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t usb2_lpm_l1_timeout_show(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
 {
-	struct usb_device *udev;
+	struct usb_device *udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", udev->l1_params.timeout);
+}
 
-	udev = to_usb_device (dev);
-	return sprintf (buf, "%d\n", udev->devnum);
+static ssize_t usb2_lpm_l1_timeout_store(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	u16 timeout;
+
+	if (kstrtou16(buf, 0, &timeout))
+		return -EINVAL;
+
+	udev->l1_params.timeout = timeout;
+
+	return count;
 }
-static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);
+static DEVICE_ATTR_RW(usb2_lpm_l1_timeout);
 
-static ssize_t
-show_version (struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t usb2_lpm_besl_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
 {
-	struct usb_device *udev;
-	u16 bcdUSB;
+	struct usb_device *udev = to_usb_device(dev);
+	return sprintf(buf, "%d\n", udev->l1_params.besl);
+}
 
-	udev = to_usb_device(dev);
-	bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
-	return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
+static ssize_t usb2_lpm_besl_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	u8 besl;
+
+	if (kstrtou8(buf, 0, &besl) || besl > 15)
+		return -EINVAL;
+
+	udev->l1_params.besl = besl;
+
+	return count;
 }
-static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
+static DEVICE_ATTR_RW(usb2_lpm_besl);
 
-static ssize_t
-show_maxchild (struct device *dev, struct device_attribute *attr, char *buf)
+static struct attribute *usb2_hardware_lpm_attr[] = {
+	&dev_attr_usb2_hardware_lpm.attr,
+	&dev_attr_usb2_lpm_l1_timeout.attr,
+	&dev_attr_usb2_lpm_besl.attr,
+	NULL,
+};
+static struct attribute_group usb2_hardware_lpm_attr_group = {
+	.name	= power_group_name,
+	.attrs	= usb2_hardware_lpm_attr,
+};
+
+static struct attribute *power_attrs[] = {
+	&dev_attr_autosuspend.attr,
+	&dev_attr_level.attr,
+	&dev_attr_connected_duration.attr,
+	&dev_attr_active_duration.attr,
+	NULL,
+};
+static struct attribute_group power_attr_group = {
+	.name	= power_group_name,
+	.attrs	= power_attrs,
+};
+
+static int add_power_attributes(struct device *dev)
 {
-	struct usb_device *udev;
+	int rc = 0;
+
+	if (is_usb_device(dev)) {
+		struct usb_device *udev = to_usb_device(dev);
+		rc = sysfs_merge_group(&dev->kobj, &power_attr_group);
+		if (udev->usb2_hw_lpm_capable == 1)
+			rc = sysfs_merge_group(&dev->kobj,
+					&usb2_hardware_lpm_attr_group);
+	}
 
-	udev = to_usb_device (dev);
-	return sprintf (buf, "%d\n", udev->maxchild);
+	return rc;
 }
-static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);
+
+static void remove_power_attributes(struct device *dev)
+{
+	sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group);
+	sysfs_unmerge_group(&dev->kobj, &power_attr_group);
+}
+
+#else
+
+#define add_power_attributes(dev)	0
+#define remove_power_attributes(dev)	do {} while (0)
+
+#endif	/* CONFIG_PM_RUNTIME */
+
 
 /* Descriptor fields */
 #define usb_descriptor_attr_le16(field, format_string)			\
 static ssize_t								\
-show_##field (struct device *dev, struct device_attribute *attr,	\
+field##_show(struct device *dev, struct device_attribute *attr,	\
 		char *buf)						\
 {									\
 	struct usb_device *udev;					\
 									\
-	udev = to_usb_device (dev);					\
-	return sprintf (buf, format_string, 				\
+	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);
+static DEVICE_ATTR_RO(field)
 
-usb_descriptor_attr_le16(idVendor, "%04x\n")
-usb_descriptor_attr_le16(idProduct, "%04x\n")
-usb_descriptor_attr_le16(bcdDevice, "%04x\n")
+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,	\
+field##_show(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);	\
+	udev = to_usb_device(dev);					\
+	return sprintf(buf, format_string, udev->descriptor.field);	\
 }									\
-static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
+static DEVICE_ATTR_RO(field)
+
+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");
+
+
+/* show if the device is authorized (1) or not (0) */
+static ssize_t authorized_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct usb_device *usb_dev = to_usb_device(dev);
+	return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
+}
+
+/*
+ * Authorize a device to be used in the system
+ *
+ * Writing a 0 deauthorizes the device, writing a 1 authorizes it.
+ */
+static ssize_t authorized_store(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t size)
+{
+	ssize_t result;
+	struct usb_device *usb_dev = to_usb_device(dev);
+	unsigned val;
+	result = sscanf(buf, "%u\n", &val);
+	if (result != 1)
+		result = -EINVAL;
+	else if (val == 0)
+		result = usb_deauthorize_device(usb_dev);
+	else
+		result = usb_authorize_device(usb_dev);
+	return result < 0 ? result : size;
+}
+static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, S_IRUGO | S_IWUSR,
+				  authorized_show, authorized_store);
+
+/* "Safely remove a device" */
+static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct usb_device *udev = to_usb_device(dev);
+	int rc = 0;
+
+	usb_lock_device(udev);
+	if (udev->state != USB_STATE_NOTATTACHED) {
+
+		/* To avoid races, first unconfigure and then remove */
+		usb_set_configuration(udev, -1);
+		rc = usb_remove_device(udev);
+	}
+	if (rc == 0)
+		rc = count;
+	usb_unlock_device(udev);
+	return rc;
+}
+static DEVICE_ATTR_IGNORE_LOCKDEP(remove, S_IWUSR, NULL, remove_store);
 
-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_configuration.attr,
 	&dev_attr_bNumInterfaces.attr,
 	&dev_attr_bConfigurationValue.attr,
 	&dev_attr_bmAttributes.attr,
 	&dev_attr_bMaxPower.attr,
 	/* device attributes */
+	&dev_attr_urbnum.attr,
 	&dev_attr_idVendor.attr,
 	&dev_attr_idProduct.attr,
 	&dev_attr_bcdDevice.attr,
@@ -405,87 +700,198 @@ static struct attribute *dev_attrs[] = {
 	&dev_attr_bNumConfigurations.attr,
 	&dev_attr_bMaxPacketSize0.attr,
 	&dev_attr_speed.attr,
+	&dev_attr_busnum.attr,
 	&dev_attr_devnum.attr,
+	&dev_attr_devpath.attr,
 	&dev_attr_version.attr,
 	&dev_attr_maxchild.attr,
+	&dev_attr_quirks.attr,
+	&dev_attr_avoid_reset_quirk.attr,
+	&dev_attr_authorized.attr,
+	&dev_attr_remove.attr,
+	&dev_attr_removable.attr,
+	&dev_attr_ltm_capable.attr,
 	NULL,
 };
 static struct attribute_group dev_attr_grp = {
 	.attrs = dev_attrs,
 };
 
-void usb_create_sysfs_dev_files (struct usb_device *udev)
+/* When modifying this list, be sure to modify dev_string_attrs_are_visible()
+ * accordingly.
+ */
+static struct attribute *dev_string_attrs[] = {
+	&dev_attr_manufacturer.attr,
+	&dev_attr_product.attr,
+	&dev_attr_serial.attr,
+	NULL
+};
+
+static umode_t dev_string_attrs_are_visible(struct kobject *kobj,
+		struct attribute *a, int n)
 {
-	struct device *dev = &udev->dev;
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
+
+	if (a == &dev_attr_manufacturer.attr) {
+		if (udev->manufacturer == NULL)
+			return 0;
+	} else if (a == &dev_attr_product.attr) {
+		if (udev->product == NULL)
+			return 0;
+	} else if (a == &dev_attr_serial.attr) {
+		if (udev->serial == NULL)
+			return 0;
+	}
+	return a->mode;
+}
+
+static struct attribute_group dev_string_attr_grp = {
+	.attrs =	dev_string_attrs,
+	.is_visible =	dev_string_attrs_are_visible,
+};
+
+const struct attribute_group *usb_device_groups[] = {
+	&dev_attr_grp,
+	&dev_string_attr_grp,
+	NULL
+};
 
-	sysfs_create_group(&dev->kobj, &dev_attr_grp);
+/* Binary descriptors */
 
-	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);
+static ssize_t
+read_descriptors(struct file *filp, struct kobject *kobj,
+		struct bin_attribute *attr,
+		char *buf, loff_t off, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
+	size_t nleft = count;
+	size_t srclen, n;
+	int cfgno;
+	void *src;
+
+	/* The binary attribute begins with the device descriptor.
+	 * Following that are the raw descriptor entries for all the
+	 * configurations (config plus subsidiary descriptors).
+	 */
+	usb_lock_device(udev);
+	for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations &&
+			nleft > 0; ++cfgno) {
+		if (cfgno < 0) {
+			src = &udev->descriptor;
+			srclen = sizeof(struct usb_device_descriptor);
+		} else {
+			src = udev->rawdescriptors[cfgno];
+			srclen = __le16_to_cpu(udev->config[cfgno].desc.
+					wTotalLength);
+		}
+		if (off < srclen) {
+			n = min(nleft, srclen - (size_t) off);
+			memcpy(buf, src + off, n);
+			nleft -= n;
+			buf += n;
+			off = 0;
+		} else {
+			off -= srclen;
+		}
+	}
+	usb_unlock_device(udev);
+	return count - nleft;
 }
 
-void usb_remove_sysfs_dev_files (struct usb_device *udev)
+static struct bin_attribute dev_bin_attr_descriptors = {
+	.attr = {.name = "descriptors", .mode = 0444},
+	.read = read_descriptors,
+	.size = 18 + 65535,	/* dev descr + max-size raw descriptor */
+};
+
+int usb_create_sysfs_dev_files(struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;
+	int retval;
+
+	retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
+	if (retval)
+		goto error;
+
+	retval = add_persist_attributes(dev);
+	if (retval)
+		goto error;
+
+	retval = add_power_attributes(dev);
+	if (retval)
+		goto error;
+	return retval;
+error:
+	usb_remove_sysfs_dev_files(udev);
+	return retval;
+}
 
-	usb_remove_ep_files(&udev->ep0);
-	sysfs_remove_group(&dev->kobj, &dev_attr_grp);
+void usb_remove_sysfs_dev_files(struct usb_device *udev)
+{
+	struct device *dev = &udev->dev;
 
-	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);
+	remove_power_attributes(dev);
+	remove_persist_attributes(dev);
+	device_remove_bin_file(dev, &dev_bin_attr_descriptors);
 }
 
+/* Interface Association Descriptor fields */
+#define usb_intf_assoc_attr(field, format_string)			\
+static ssize_t								\
+iad_##field##_show(struct device *dev, struct device_attribute *attr,	\
+		char *buf)						\
+{									\
+	struct usb_interface *intf = to_usb_interface(dev);		\
+									\
+	return sprintf(buf, format_string,				\
+			intf->intf_assoc->field); 			\
+}									\
+static DEVICE_ATTR_RO(iad_##field)
+
+usb_intf_assoc_attr(bFirstInterface, "%02x\n");
+usb_intf_assoc_attr(bInterfaceCount, "%02d\n");
+usb_intf_assoc_attr(bFunctionClass, "%02x\n");
+usb_intf_assoc_attr(bFunctionSubClass, "%02x\n");
+usb_intf_assoc_attr(bFunctionProtocol, "%02x\n");
+
 /* Interface fields */
 #define usb_intf_attr(field, format_string)				\
 static ssize_t								\
-show_##field (struct device *dev, struct device_attribute *attr,	\
+field##_show(struct device *dev, struct device_attribute *attr,		\
 		char *buf)						\
 {									\
-	struct usb_interface *intf = to_usb_interface (dev);		\
+	struct usb_interface *intf = to_usb_interface(dev);		\
 									\
-	return sprintf (buf, format_string,				\
+	return sprintf(buf, format_string,				\
 			intf->cur_altsetting->desc.field); 		\
 }									\
-static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
+static DEVICE_ATTR_RO(field)
 
-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")
+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)
+static ssize_t interface_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
 {
 	struct usb_interface *intf;
-	struct usb_device *udev;
-	int len;
+	char *string;
 
-	intf = to_usb_interface (dev);
-	udev = interface_to_usbdev (intf);
-	len = snprintf(buf, 256, "%s", intf->cur_altsetting->string);
-	if (len < 0)
+	intf = to_usb_interface(dev);
+	string = ACCESS_ONCE(intf->cur_altsetting->string);
+	if (!string)
 		return 0;
-	buf[len] = '\n';
-	buf[len+1] = 0;
-	return len+1;
+	return sprintf(buf, "%s\n", string);
 }
-static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
+static DEVICE_ATTR_RO(interface);
 
-static ssize_t show_modalias(struct device *dev,
-		struct device_attribute *attr, char *buf)
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
 {
 	struct usb_interface *intf;
 	struct usb_device *udev;
@@ -493,10 +899,10 @@ static ssize_t show_modalias(struct device *dev,
 
 	intf = to_usb_interface(dev);
 	udev = interface_to_usbdev(intf);
-	alt = intf->cur_altsetting;
+	alt = ACCESS_ONCE(intf->cur_altsetting);
 
 	return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
-			"ic%02Xisc%02Xip%02X\n",
+			"ic%02Xisc%02Xip%02Xin%02X\n",
 			le16_to_cpu(udev->descriptor.idVendor),
 			le16_to_cpu(udev->descriptor.idProduct),
 			le16_to_cpu(udev->descriptor.bcdDevice),
@@ -505,9 +911,25 @@ static ssize_t show_modalias(struct device *dev,
 			udev->descriptor.bDeviceProtocol,
 			alt->desc.bInterfaceClass,
 			alt->desc.bInterfaceSubClass,
-			alt->desc.bInterfaceProtocol);
+			alt->desc.bInterfaceProtocol,
+			alt->desc.bInterfaceNumber);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static ssize_t supports_autosuspend_show(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	int s;
+
+	device_lock(dev);
+	/* Devices will be autosuspended even when an interface isn't claimed */
+	s = (!dev->driver || to_usb_driver(dev->driver)->supports_autosuspend);
+	device_unlock(dev);
+
+	return sprintf(buf, "%u\n", s);
 }
-static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
+static DEVICE_ATTR_RO(supports_autosuspend);
 
 static struct attribute *intf_attrs[] = {
 	&dev_attr_bInterfaceNumber.attr,
@@ -517,53 +939,64 @@ static struct attribute *intf_attrs[] = {
 	&dev_attr_bInterfaceSubClass.attr,
 	&dev_attr_bInterfaceProtocol.attr,
 	&dev_attr_modalias.attr,
+	&dev_attr_supports_autosuspend.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)
+static struct attribute *intf_assoc_attrs[] = {
+	&dev_attr_iad_bFirstInterface.attr,
+	&dev_attr_iad_bInterfaceCount.attr,
+	&dev_attr_iad_bFunctionClass.attr,
+	&dev_attr_iad_bFunctionSubClass.attr,
+	&dev_attr_iad_bFunctionProtocol.attr,
+	NULL,
+};
+
+static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
+		struct attribute *a, int n)
 {
-	struct usb_host_interface *iface_desc;
-	int i;
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_interface *intf = to_usb_interface(dev);
 
-	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);
+	if (intf->intf_assoc == NULL)
+		return 0;
+	return a->mode;
 }
 
-static inline void usb_remove_intf_ep_files(struct usb_interface *intf)
-{
-	struct usb_host_interface *iface_desc;
-	int i;
+static struct attribute_group intf_assoc_attr_grp = {
+	.attrs =	intf_assoc_attrs,
+	.is_visible =	intf_assoc_attrs_are_visible,
+};
 
-	iface_desc = intf->cur_altsetting;
-	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
-		usb_remove_ep_files(&iface_desc->endpoint[i]);
-}
+const struct attribute_group *usb_interface_groups[] = {
+	&intf_attr_grp,
+	&intf_assoc_attr_grp,
+	NULL
+};
 
-void usb_create_sysfs_intf_files (struct usb_interface *intf)
+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 (intf->sysfs_files_created || intf->unregistering)
+		return;
 
-	if (alt->string == NULL)
+	if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
 		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);
+	if (alt->string && device_create_file(&intf->dev, &dev_attr_interface))
+		;	/* We don't actually care if the function fails. */
+	intf->sysfs_files_created = 1;
 }
 
-void usb_remove_sysfs_intf_files (struct usb_interface *intf)
+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->sysfs_files_created)
+		return;
 
-	if (intf->cur_altsetting->string)
-		device_remove_file(&intf->dev, &dev_attr_interface);
+	device_remove_file(&intf->dev, &dev_attr_interface);
+	intf->sysfs_files_created = 0;
 }