USB: cdc: add MBIM extended functional descriptor structure

This patch adds the MBIM extended functional descriptor structure
defined in "Universal Serial Bus Communications Class Subclass
Specification for Mobile Broadband Interface Model, Revision 1.0,
Errata-1" published by USB-IF.

Signed-off-by: Ben Chan <benchan@chromium.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/usb/cdc.h b/include/uapi/linux/usb/cdc.h
index f35aa0a338c7610d89aa7f9e92e47d7e3a0de0a2..b6a9cdd6e096a26831bcb5c1cc69e6d41c8afe05 100644 (file)
--- a/include/uapi/linux/usb/cdc.h
+++ b/include/uapi/linux/usb/cdc.h
@@ -56,6 +56,7 @@
 #define USB_CDC_OBEX_TYPE              0x15
 #define USB_CDC_NCM_TYPE               0x1a
 #define USB_CDC_MBIM_TYPE              0x1b
+#define USB_CDC_MBIM_EXTENDED_TYPE     0x1c
 
 /* "Header Functional Descriptor" from CDC spec  5.2.3.1 */
 struct usb_cdc_header_desc {
@@ -205,6 +206,17 @@ struct usb_cdc_mbim_desc {
        __u8    bmNetworkCapabilities;
 } __attribute__ ((packed));
 
+/* "MBIM Extended Functional Descriptor" from CDC MBIM spec 1.0 errata-1 */
+struct usb_cdc_mbim_extended_desc {
+       __u8    bLength;
+       __u8    bDescriptorType;
+       __u8    bDescriptorSubType;
+
+       __le16  bcdMBIMExtendedVersion;
+       __u8    bMaxOutstandingCommandMessages;
+       __le16  wMTU;
+} __attribute__ ((packed));
+
 /*-------------------------------------------------------------------------*/
 
 /*