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authorGreg Suarez <gsuarez@smithmicro.com>2012-10-22 14:56:36 +0400
committerDavid S. Miller <davem@davemloft.net>2012-10-23 10:40:11 +0400
commit9bf211a30b3f158c39cf1c6adb3a9388d41740ce (patch)
tree2558261610dfab51b50533d3b476a8b5e39b54cf /include
parentc91ce3b6bff780453283a5882ecd54f267f4682f (diff)
downloadlinux-9bf211a30b3f158c39cf1c6adb3a9388d41740ce.tar.xz
net: cdc_mbim: adding MBIM driver
The CDC Mobile Broadband Interface Model (MBIM) specification extends CDC NCM by - removing the redundant ethernet header from the point-to-point USB channel - adding support for multiple IP (v4 and/or v6) sessions multiplexed on the same USB channel - adding a MBIM control channel encapsulated in CDC - adding Device Service Streams (DSS), which are non IP generic data streams multiplexed on the same USB channel as the IP sessions MBIM devices are managed using the dedicated control channel, and no data will flow on the data channel until a control session has been established. This driver has no knowledge of MBIM control messages. It just exports the control channel to a /dev/cdc-wdmX character device for userspace management applications. Such an application is therefore required to use this driver. This patch implements basic MBIM support, reusing the NCM and WDM driver APIs, currently limited to IP sessions with SessionID 0. DSS and multiplexed IP sessions are not yet supported. Signed-off-by: Greg Suarez <gsuarez@smithmicro.com> Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/usb/cdc_ncm.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h
index d1719a72f7d2..3b8f9d4fc3fe 100644
--- a/include/linux/usb/cdc_ncm.h
+++ b/include/linux/usb/cdc_ncm.h
@@ -36,6 +36,12 @@
* SUCH DAMAGE.
*/
+#define CDC_NCM_COMM_ALTSETTING_NCM 0
+#define CDC_NCM_COMM_ALTSETTING_MBIM 1
+
+#define CDC_NCM_DATA_ALTSETTING_NCM 1
+#define CDC_NCM_DATA_ALTSETTING_MBIM 2
+
/* CDC NCM subclass 3.2.1 */
#define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10
@@ -74,6 +80,10 @@
(sizeof(struct usb_cdc_ncm_ndp16) + \
(CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16))
+#define cdc_ncm_comm_intf_is_mbim(x) ((x)->desc.bInterfaceSubClass == USB_CDC_SUBCLASS_MBIM && \
+ (x)->desc.bInterfaceProtocol == USB_CDC_PROTO_NONE)
+#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB)
+
struct cdc_ncm_ctx {
struct usb_cdc_ncm_ntb_parameters ncm_parm;
struct hrtimer tx_timer;