[acm] Add support for CDC-ACM (aka USB RNDIS) devices

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/src/drivers/net/acm.h b/src/drivers/net/acm.h
new file mode 100644
index 00000000..d4944967
--- /dev/null
+++ b/src/drivers/net/acm.h
@@ -0,0 +1,69 @@
+#ifndef _ACM_H
+#define _ACM_H
+
+/** @file
+ *
+ * USB RNDIS Ethernet driver
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/usb.h>
+#include <ipxe/cdc.h>
+
+/** CDC-ACM subclass */
+#define USB_SUBCLASS_CDC_ACM 0x02
+
+/** CDC-ACM RNDIS device protocol */
+#define USB_PROTOCOL_ACM_RNDIS 0xff
+
+/** Class code for wireless devices */
+#define USB_CLASS_WIRELESS 0xe0
+
+/** Radio frequency device subclass */
+#define USB_SUBCLASS_WIRELESS_RADIO 0x01
+
+/** Radio frequency RNDIS device protocol */
+#define USB_PROTOCOL_RADIO_RNDIS 0x03
+
+/** A USB RNDIS network device */
+struct acm_device {
+	/** USB device */
+	struct usb_device *usb;
+	/** USB bus */
+	struct usb_bus *bus;
+	/** RNDIS device */
+	struct rndis_device *rndis;
+	/** USB network device */
+	struct usbnet_device usbnet;
+
+	/** An encapsulated response is available */
+	int responded;
+};
+
+/** Interrupt maximum fill level
+ *
+ * This is a policy decision.
+ */
+#define ACM_INTR_MAX_FILL 2
+
+/** Bulk IN maximum fill level
+ *
+ * This is a policy decision.
+ */
+#define ACM_IN_MAX_FILL 8
+
+/** Bulk IN buffer size
+ *
+ * This is a policy decision.
+ */
+#define ACM_IN_MTU 2048
+
+/** Encapsulated response buffer size
+ *
+ * This is a policy decision.
+ */
+#define ACM_RESPONSE_MTU 128
+
+#endif /* _ACM_H */