net/usb: Ethernet quirks for the LG-VL600 4G modem
This adds a driver for the CDC Ethernet part of this modem. The
device's ID is blacklisted in cdc_ether.c and is white-listed in
this new driver because of the quirks needed to make it useful.
The modem's firmware exposes a CDC ACM port for modem control and a
CDC Ethernet port for network data. The descriptors look fine but
both ports actually are some sort of multiplexers requiring non-
standard headers added/removed from every packet or they get
ignored. All information is based on a usb traffic log from a
Windows machine.
On the Verizon 4G network I've seen speeds up to 1.1MB/s so far with
this driver, a speed-o-meter site reports 16.2Mbps/10.5Mbps.
Userspace scripts are required to talk to the CDC ACM port.
Signed-off-by: Andrzej Zaborowski <balrogg@gmail.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 9a60e41..51c259b 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -378,7 +378,7 @@
__le32_to_cpu(speeds[1]) / 1000);
}
-static void cdc_status(struct usbnet *dev, struct urb *urb)
+void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
{
struct usb_cdc_notification *event;
@@ -418,8 +418,9 @@
break;
}
}
+EXPORT_SYMBOL_GPL(usbnet_cdc_status);
-static int cdc_bind(struct usbnet *dev, struct usb_interface *intf)
+int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
{
int status;
struct cdc_state *info = (void *) &dev->data;
@@ -441,6 +442,7 @@
*/
return 0;
}
+EXPORT_SYMBOL_GPL(usbnet_cdc_bind);
static int cdc_manage_power(struct usbnet *dev, int on)
{
@@ -452,18 +454,18 @@
.description = "CDC Ethernet Device",
.flags = FLAG_ETHER,
// .check_connect = cdc_check_connect,
- .bind = cdc_bind,
+ .bind = usbnet_cdc_bind,
.unbind = usbnet_cdc_unbind,
- .status = cdc_status,
+ .status = usbnet_cdc_status,
.manage_power = cdc_manage_power,
};
static const struct driver_info mbm_info = {
.description = "Mobile Broadband Network Device",
.flags = FLAG_WWAN,
- .bind = cdc_bind,
+ .bind = usbnet_cdc_bind,
.unbind = usbnet_cdc_unbind,
- .status = cdc_status,
+ .status = usbnet_cdc_status,
.manage_power = cdc_manage_power,
};
@@ -560,6 +562,13 @@
.driver_info = 0,
},
+/* LG Electronics VL600 wants additional headers on every frame */
+{
+ USB_DEVICE_AND_INTERFACE_INFO(0x1004, 0x61aa, USB_CLASS_COMM,
+ USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
+ .driver_info = 0,
+},
+
/*
* WHITELIST!!!
*