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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-06-19 18:19:46 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 15:16:13 -0700
commitda741b8c56d612b5dd26ffa31341911a5fea23ee (patch)
tree201018abff24086e048a7dbf96ae07e60a82433e /drivers/usb/gadget/u_ether.h
parent8a40819e97368f2b6e67fea103348f9fc2f68ceb (diff)
downloadlinux-da741b8c56d612b5dd26ffa31341911a5fea23ee.tar.bz2
usb ethernet gadget: split CDC Ethernet function
This is a "CDC Ethernet" (ECM) function driver, extracted from the all-in-one Ethernet gadget driver. This is a good example of how to implement interface altsettings. In fact it's currently the only such example in the gadget stack, pending addition of OBEX support. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/u_ether.h')
-rw-r--r--drivers/usb/gadget/u_ether.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/gadget/u_ether.h b/drivers/usb/gadget/u_ether.h
index 0ef823447f28..8abf197ab402 100644
--- a/drivers/usb/gadget/u_ether.h
+++ b/drivers/usb/gadget/u_ether.h
@@ -28,6 +28,9 @@
#include <linux/usb/composite.h>
#include <linux/usb/cdc.h>
+#include "gadget_chips.h"
+
+
/*
* This represents the USB side of an "ethernet" link, managed by a USB
* function which provides control and (maybe) framing. Two functions
@@ -80,7 +83,28 @@ void gether_cleanup(void);
struct net_device *gether_connect(struct gether *);
void gether_disconnect(struct gether *);
+/* Some controllers can't support CDC Ethernet (ECM) ... */
+static inline bool can_support_ecm(struct usb_gadget *gadget)
+{
+ if (!gadget_supports_altsettings(gadget))
+ return false;
+
+ /* SA1100 can do ECM, *without* status endpoint ... but we'll
+ * only use it in non-ECM mode for backwards compatibility
+ * (and since we currently require a status endpoint)
+ */
+ if (gadget_is_sa1100(gadget))
+ return false;
+
+ /* Everything else is *presumably* fine ... but this is a bit
+ * chancy, so be **CERTAIN** there are no hardware issues with
+ * your controller. Add it above if it can't handle CDC.
+ */
+ return true;
+}
+
/* each configuration may bind one instance of an ethernet link */
int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
+int ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
#endif /* __U_ETHER_H */