these two methods will be used to tell
controller driver to prepare for starting/stopping
operation with a gadget driver. They will
be implemented and used by the new usb udc
class which will come in later patches.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
include/linux/usb/gadget.h | 40 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index d3ef42d..b5c0527 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -430,6 +430,8 @@ struct usb_gadget_ops {
int (*pullup) (struct usb_gadget *, int is_on);
int (*ioctl)(struct usb_gadget *,
unsigned code, unsigned long param);
+ int (*start)(struct usb_gadget *);
+ void (*stop)(struct usb_gadget *);
};
/**
@@ -641,6 +643,44 @@ static inline int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
}
/**
+ * usb_gadget_start - tells usb device controller to start up
+ * @gadget: The device we want to get started
+ *
+ * This call is issued by the UDC Class driver when it's about
+ * to register a gadget driver to the device controller, before
+ * calling gadget driver's bind() method.
+ *
+ * It allows the controller to be powered off until extrictly
+ * necessary to have it powered on.
+ *
+ * Returns zero on success, else negative errno.
+ */
+static inline int usb_gadget_start(struct usb_gadget *gadget)
+{
+ if (!gadget->ops->start)
+ return -EOPNOTSUPP;
+ return gadget->ops->start(gadget);
+}
+
+/**
+ * usb_gadget_stop - tells usb device controller we don't need it anymore
+ * @gadget: The device we want to stop activity
+ *
+ * This call is issued by the UDC Class driver after calling
+ * gadget driver's unbind() method.
+ *
+ * The details are implementation specific, but it can go as
+ * far as powering off UDC completely and disable its data
+ * line pullups.
+ */
+static inline void usb_gadget_stop(struct usb_gadget *gadget)
+{
+ if (!gadget->ops->stop)
+ return;
+ gadget->ops->stop(gadget);
+}
+
+/**
* usb_gadget_vbus_disconnect - notify controller about VBUS session end
* @gadget:the device whose VBUS supply is being described
* Context: can sleep
--
1.7.3.rc0.35.g8ac8c
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