cdc_ether: Identify MBM devices by GUID in MDLM descriptor
This patch removes vid/pid for Ericsson MBM devices from the whitelist set of
devices. The MBM devices are instead identified by GUID.
In order for cdc_ether to handle these devices the GUID in the MDLM descriptor
is tested. All MBM devices currently handled by cdc_ether as well as future
CDC Ethernet MBM devices can be identified by the GUID.
This is the same solution used in Carl Nordbeck's mbm driver,
http://kerneltrap.org/mailarchive/linux-usb/2008/11/17/4141384/thread
I post this as RFC to get feedback on however cdc_ether is the correct place to
do the binding, or if it should be done in a separate driver, e.g. zaurus.
Signed-off-by: Jonas Sjöquist <jonas.sjoquist@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index c8cdb7f..811b2dc 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -64,6 +64,11 @@
#endif
+static const u8 mbm_guid[16] = {
+ 0xa3, 0x17, 0xa8, 0x8b, 0x04, 0x5e, 0x4f, 0x01,
+ 0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
+};
+
/*
* probes control interface, claims data interface, collects the bulk
* endpoints, activates data interface (if needed), maybe sets MTU.
@@ -79,6 +84,8 @@
int status;
int rndis;
struct usb_driver *driver = driver_of(intf);
+ struct usb_cdc_mdlm_desc *desc = NULL;
+ struct usb_cdc_mdlm_detail_desc *detail = NULL;
if (sizeof dev->data < sizeof *info)
return -EDOM;
@@ -229,6 +236,34 @@
* side link address we were given.
*/
break;
+ case USB_CDC_MDLM_TYPE:
+ if (desc) {
+ dev_dbg(&intf->dev, "extra MDLM descriptor\n");
+ goto bad_desc;
+ }
+
+ desc = (void *)buf;
+
+ if (desc->bLength != sizeof(*desc))
+ goto bad_desc;
+
+ if (memcmp(&desc->bGUID, mbm_guid, 16))
+ goto bad_desc;
+ break;
+ case USB_CDC_MDLM_DETAIL_TYPE:
+ if (detail) {
+ dev_dbg(&intf->dev, "extra MDLM detail descriptor\n");
+ goto bad_desc;
+ }
+
+ detail = (void *)buf;
+
+ if (detail->bGuidDescriptorType == 0) {
+ if (detail->bLength < (sizeof(*detail) + 1))
+ goto bad_desc;
+ } else
+ goto bad_desc;
+ break;
}
next_desc:
len -= buf [0]; /* bLength */
@@ -542,80 +577,10 @@
USB_CDC_PROTO_NONE),
.driver_info = (unsigned long) &cdc_info,
}, {
- /* Ericsson F3507g */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1900, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3507g ver. 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1902, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3607gw */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1904, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3607gw ver 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1905, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3607gw ver 3 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1906, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3307 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x190a, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson F3307 ver 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1909, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson C3607w */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x1049, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Ericsson C3607w ver 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0bdb, 0x190b, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Toshiba F3507g */
- USB_DEVICE_AND_INTERFACE_INFO(0x0930, 0x130b, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Toshiba F3607gw */
- USB_DEVICE_AND_INTERFACE_INFO(0x0930, 0x130c, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Toshiba F3607gw ver 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x0930, 0x1311, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Dell F3507g */
- USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x8147, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Dell F3607gw */
- USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x8183, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
-}, {
- /* Dell F3607gw ver 2 */
- USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x8184, USB_CLASS_COMM,
- USB_CDC_SUBCLASS_MDLM, USB_CDC_PROTO_NONE),
- .driver_info = (unsigned long) &mbm_info,
+ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
+ USB_CDC_PROTO_NONE),
+ .driver_info = (unsigned long)&mbm_info,
+
},
{ }, // END
};