diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 75 |
1 files changed, 65 insertions, 10 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index b04afd06e50..a37ccbd1e00 100644 --- 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 */ @@ -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, @@ -601,21 +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) \ @@ -735,6 +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; @@ -746,6 +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; } @@ -753,8 +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; } |