[PATCH] USB: usbnet (2/9) module for simple network links

This patch creates the first of several separate "minidriver" modules
for "usbnet".  This one handles only the very simplest hardware, which
can be handled almost entirely by the "usbnet" core.

    - Move device-specific bits into new "cdc_subset.c" driver,
      shrinking "usbnet" by a bunch;

    - Export the functions needed to support this minidriver
      (with EXPORT_SYMBOL_GPL);

    - Update Kconfig and kbuild accordingly.

This one handles about a dozen different device types, with the most
notable ones being Gumstix and most Linux-based PDAs (except Zaurus
running that ancient code from Sharp).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/usb/net/usbnet.h b/drivers/usb/net/usbnet.h
index 44026189a8a1..d903b4617563 100644
--- a/drivers/usb/net/usbnet.h
+++ b/drivers/usb/net/usbnet.h
@@ -24,7 +24,7 @@
 #define	__USBNET_H
 
 
-/* interface from usbnet core to each USB networking device we handle */
+/* interface from usbnet core to each USB networking link we handle */
 struct usbnet {
 	/* housekeeping */
 	struct usb_device	*udev;
@@ -62,6 +62,10 @@ struct usbnet {
 #		define EVENT_LINK_RESET	4
 };
 
+static inline struct usb_driver *driver_of(struct usb_interface *intf)
+{
+	return to_usb_driver(intf->dev.driver);
+}
 
 /* interface from the device/framing level "minidriver" to core */
 struct driver_info {
@@ -111,6 +115,15 @@ struct driver_info {
 	unsigned long	data;		/* Misc driver specific data */
 };
 
+/* Minidrivers are just drivers using the "usbnet" core as a powerful
+ * network-specific subroutine library ... that happens to do pretty
+ * much everything except custom framing and chip-specific stuff.
+ */
+extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
+extern int usbnet_suspend (struct usb_interface *, pm_message_t );
+extern int usbnet_resume (struct usb_interface *);
+extern void usbnet_disconnect(struct usb_interface *);
+
 
 /* we record the state for each of our queued skbs */
 enum skb_state {