--- /dev/null
+What: /sys/devices/platform/_UDC_/gadget/suspended
+Date: April 2010
+Contact: Fabien Chouteau <fabien.chouteau@barco.com>
+Description:
+ Show the suspend state of an USB composite gadget.
+ 1 -> suspended
+ 0 -> resumed
+
+ (_UDC_ is the name of the USB Device Controller driver)
/*-------------------------------------------------------------------------*/
+static ssize_t composite_show_suspended(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+ struct usb_composite_dev *cdev = get_gadget_data(gadget);
+
+ return sprintf(buf, "%d\n", cdev->suspended);
+}
+
+static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL);
+
static void /* __init_or_exit */
composite_unbind(struct usb_gadget *gadget)
{
}
kfree(cdev);
set_gadget_data(gadget, NULL);
+ device_remove_file(&gadget->dev, &dev_attr_suspended);
composite = NULL;
}
string_override(composite->strings,
cdev->desc.iSerialNumber, iSerialNumber);
+ status = device_create_file(&gadget->dev, &dev_attr_suspended);
+ if (status)
+ goto fail;
+
INFO(cdev, "%s ready\n", composite->name);
return 0;
}
if (composite->suspend)
composite->suspend(cdev);
+
+ cdev->suspended = 1;
}
static void
f->resume(f);
}
}
+
+ cdev->suspended = 0;
}
/*-------------------------------------------------------------------------*/
{ dev_set_drvdata(&gadget->dev, data); }
static inline void *get_gadget_data(struct usb_gadget *gadget)
{ return dev_get_drvdata(&gadget->dev); }
+static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
+{
+ return container_of(dev, struct usb_gadget, dev);
+}
/* iterates the non-control endpoints; 'tmp' is a struct usb_ep pointer */
#define gadget_for_each_ep(tmp,gadget) \