[PATCH] USB: usbnet (8/9) module for RNDIS devices

This adds host-side RNDIS support to the "usbnet" driver, so Linux can talk
to various devices (often based on WinCE) that otherwise only Windows could
talk to.

Tested with little-endian Linux talking to a Linux-USB Ethernet/RNDIS based
peripheral.  This also includes updates from Eddie C. Dost <ecd@brainaid.de>
for big-endian SPARC Linux talking to a Nokia 9500 Communicator.

It's still marked as EXPERIMENTAL because this code is so young.  This
ought to let Linux to work with various cable modems that previously
would have been "Windows Only".
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/net/Kconfig

@@ -212,6 +212,19 @@ config USB_NET_NET1080
 	  on this design:  one NetChip 1080 chip and supporting logic,
 	  optionally with LEDs that indicate traffic
 
+config USB_NET_RNDIS_HOST
+	tristate "Host for RNDIS devices (EXPERIMENTAL)"
+	depends on USB_USBNET && EXPERIMENTAL
+	select USB_NET_CDCETHER
+	help
+	  This option enables hosting "Remote NDIS" USB networking links,
+	  as encouraged by Microsoft (instead of CDC Ethernet!) for use in
+	  various devices that may only support this protocol.
+
+	  Avoid using this protocol unless you have no better options.
+	  The protocol specification is incomplete, and is controlled by
+	  (and for) Microsoft; it isn't an "Open" ecosystem or market.
+
 config USB_NET_CDC_SUBSET
 	tristate "Simple USB Network Links (CDC Ethernet subset)"
 	depends on USB_USBNET

drivers/usb/net/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_USB_NET_AX8817X)	+= asix.o
 obj-$(CONFIG_USB_NET_CDCETHER)	+= cdc_ether.o
 obj-$(CONFIG_USB_NET_GL620A)	+= gl620a.o
 obj-$(CONFIG_USB_NET_NET1080)	+= net1080.o
+obj-$(CONFIG_USB_NET_RNDIS_HOST)	+= rndis_host.o
 obj-$(CONFIG_USB_NET_CDC_SUBSET)	+= cdc_subset.o
 obj-$(CONFIG_USB_NET_ZAURUS)	+= zaurus.o
 obj-$(CONFIG_USB_USBNET)	+= usbnet.o

drivers/usb/net/usbnet.c

@@ -103,6 +103,7 @@
  * 		disconnect; other cleanups. (db)  Flush net1080 fifos
  * 		after several sequential framing errors. (Johannes Erdfelt)
  * 22-aug-2003	AX8817X support (Dave Hollis).
+ *
  * 14-jun-2004  Trivial patch for AX8817X based Buffalo LUA-U2-KTX in Japan
  *		(Neil Bortnak)
  * 03-nov-2004	Trivial patch for KC2190 (KC-190) chip. (Jonathan McDowell)
@@ -1374,14 +1375,6 @@ static const struct usb_device_id	products [] = {
 	USB_DEVICE (0x067b, 0x0001),	// PL-2302
 	.driver_info =	(unsigned long) &prolific_info,
 },
-#endif
-
-#ifdef	CONFIG_USB_RNDIS
-{
-	/* RNDIS is MSFT's un-official variant of CDC ACM */
-	USB_INTERFACE_INFO (USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
-	.driver_info = (unsigned long) &rndis_info,
-},
 #endif
 	{ },		// END
 };