USB: EHCI: carry out port handover during each root-hub resume

[linux-2.6] / drivers / usb / core / sysfs.c

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index e02590297d31599ee739c359ff2626ea2a67141e..a37ccbd1e007c478022ff02b22beeef3fd81976f 100644 (file)
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -72,7 +72,7 @@ set_bConfigurationValue(struct device *dev, struct device_attribute *attr,
        return (value < 0) ? value : count;
 }
 
-static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, 
+static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR,
                show_bConfigurationValue, set_bConfigurationValue);
 
 /* String fields */
@@ -169,6 +169,16 @@ show_quirks(struct device *dev, struct device_attribute *attr, char *buf)
 }
 static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL);
 
+static ssize_t
+show_urbnum(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(urbnum, S_IRUGO, show_urbnum, NULL);
+
 
 #if defined(CONFIG_USB_PERSIST) || defined(CONFIG_USB_SUSPEND)
 static const char power_group[] = "power";
@@ -238,6 +248,41 @@ static void remove_persist_attributes(struct device *dev)
 
 #ifdef CONFIG_USB_SUSPEND
 
+static ssize_t
+show_connected_duration(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(connected_duration, S_IRUGO, show_connected_duration, NULL);
+
+/*
+ * 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
+show_active_duration(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(active_duration, S_IRUGO, show_active_duration, NULL);
+
 static ssize_t
 show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
 {
@@ -355,12 +400,26 @@ static int add_power_attributes(struct device *dev)
                        rc = sysfs_add_file_to_group(&dev->kobj,
                                        &dev_attr_level.attr,
                                        power_group);
+               if (rc == 0)
+                       rc = sysfs_add_file_to_group(&dev->kobj,
+                                       &dev_attr_connected_duration.attr,
+                                       power_group);
+               if (rc == 0)
+                       rc = sysfs_add_file_to_group(&dev->kobj,
+                                       &dev_attr_active_duration.attr,
+                                       power_group);
        }
        return rc;
 }
 
 static void remove_power_attributes(struct device *dev)
 {
+       sysfs_remove_file_from_group(&dev->kobj,
+                       &dev_attr_active_duration.attr,
+                       power_group);
+       sysfs_remove_file_from_group(&dev->kobj,
+                       &dev_attr_connected_duration.attr,
+                       power_group);
        sysfs_remove_file_from_group(&dev->kobj,
                        &dev_attr_level.attr,
                        power_group);
@@ -458,6 +517,7 @@ static struct attribute *dev_attrs[] = {
        &dev_attr_bConfigurationValue.attr,
        &dev_attr_bmAttributes.attr,
        &dev_attr_bMaxPower.attr,
+       &dev_attr_urbnum.attr,
        /* device attributes */
        &dev_attr_idVendor.attr,
        &dev_attr_idProduct.attr,
@@ -590,21 +650,21 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
 /* Interface Accociation Descriptor fields */
 #define usb_intf_assoc_attr(field, format_string)                      \
 static ssize_t                                                         \
-show_iad_##field (struct device *dev, struct device_attribute *attr,   \
+show_iad_##field(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,                             \
-                       intf->intf_assoc->field);               \
+       return sprintf(buf, format_string,                              \
+                       intf->intf_assoc->field);                       \
 }                                                                      \
 static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL);
 
-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")
+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)                            \
@@ -724,6 +784,8 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf)
        struct usb_host_interface *alt = intf->cur_altsetting;
        int retval;
 
+       if (intf->sysfs_files_created)
+               return 0;
        retval = sysfs_create_group(&dev->kobj, &intf_attr_grp);
        if (retval)
                return retval;
@@ -735,6 +797,7 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf)
        if (intf->intf_assoc)
                retval = sysfs_create_group(&dev->kobj, &intf_assoc_attr_grp);
        usb_create_intf_ep_files(intf, udev);
+       intf->sysfs_files_created = 1;
        return 0;
 }
 
@@ -742,8 +805,11 @@ void usb_remove_sysfs_intf_files(struct usb_interface *intf)
 {
        struct device *dev = &intf->dev;
 
+       if (!intf->sysfs_files_created)
+               return;
        usb_remove_intf_ep_files(intf);
        device_remove_file(dev, &dev_attr_interface);
        sysfs_remove_group(&dev->kobj, &intf_attr_grp);
        sysfs_remove_group(&intf->dev.kobj, &intf_assoc_attr_grp);
+       intf->sysfs_files_created = 0;
 }