diff options
| -rw-r--r-- | drivers/usb/core/hub.c | 10 | ||||
| -rw-r--r-- | drivers/usb/core/sysfs.c | 49 | ||||
| -rw-r--r-- | drivers/usb/core/usb.c | 2 | ||||
| -rw-r--r-- | include/linux/usb.h | 3 |
4 files changed, 63 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index cc93aa9..53fe049 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1034,8 +1034,10 @@ static void recursively_mark_NOTATTACHED(struct usb_device *udev) if (udev->children[i]) recursively_mark_NOTATTACHED(udev->children[i]); } - if (udev->state == USB_STATE_SUSPENDED) + if (udev->state == USB_STATE_SUSPENDED) { udev->discon_suspended = 1; + udev->active_duration -= jiffies; + } udev->state = USB_STATE_NOTATTACHED; } @@ -1084,6 +1086,12 @@ void usb_set_device_state(struct usb_device *udev, else device_init_wakeup(&udev->dev, 0); } + if (udev->state == USB_STATE_SUSPENDED && + new_state != USB_STATE_SUSPENDED) + udev->active_duration -= jiffies; + else if (new_state == USB_STATE_SUSPENDED && + udev->state != USB_STATE_SUSPENDED) + udev->active_duration += jiffies; udev->state = new_state; } else recursively_mark_NOTATTACHED(udev); diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 32bd130..021b1d3 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -249,6 +249,41 @@ 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) { struct usb_device *udev = to_usb_device(dev); @@ -365,6 +400,14 @@ 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; } @@ -372,6 +415,12 @@ static int add_power_attributes(struct device *dev) 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); sysfs_remove_file_from_group(&dev->kobj, diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index bc5edac..fdb444d 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -339,6 +339,8 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1) mutex_init(&dev->pm_mutex); INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work); dev->autosuspend_delay = usb_autosuspend_delay * HZ; + dev->connect_time = jiffies; + dev->active_duration = -jiffies; #endif if (root_hub) /* Root hub always ok [and always wired] */ dev->authorized = 1; diff --git a/include/linux/usb.h b/include/linux/usb.h index 8aae045..f8a60756 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -419,12 +419,15 @@ struct usb_device { u32 quirks; /* quirks of the whole device */ atomic_t urbnum; /* number of URBs submitted for the whole device */ + unsigned long active_duration; /* total time device is not suspended */ + #ifdef CONFIG_PM struct delayed_work autosuspend; /* for delayed autosuspends */ struct mutex pm_mutex; /* protects PM operations */ unsigned long last_busy; /* time of last use */ int autosuspend_delay; /* in jiffies */ + unsigned long connect_time; /* time device was first connected */ unsigned auto_pm:1; /* autosuspend/resume in progress */ unsigned do_remote_wakeup:1; /* remote wakeup should be enabled */ |
