// SPDX-License-Identifier: GPL-2.0-or-later /* * Ethernet interface part of the LG VL600 LTE modem (4G dongle) * * Copyright (C) 2011 Intel Corporation * Author: Andrzej Zaborowski <[email protected]> */ #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/mii.h> #include <linux/usb.h> #include <linux/usb/cdc.h> #include <linux/usb/usbnet.h> #include <linux/if_ether.h> #include <linux/if_arp.h> #include <linux/inetdevice.h> #include <linux/module.h> /* * The device has a CDC ACM port for modem control (it claims to be * CDC ACM anyway) and a CDC Ethernet port for actual network data. * It will however ignore data on both ports that is not encapsulated * in a specific way, any data returned is also encapsulated the same * way. The headers don't seem to follow any popular standard. * * This driver adds and strips these headers from the ethernet frames * sent/received from the CDC Ethernet port. The proprietary header * replaces the standard ethernet header in a packet so only actual * ethernet frames are allowed. The headers allow some form of * multiplexing by using non standard values of the .h_proto field. * Windows/Mac drivers do send a couple of such frames to the device * during initialisation, with protocol set to 0x0906 or 0x0b06 and (what * seems to be) a flag in the .dummy_flags. This doesn't seem necessary * for modem operation but can possibly be used for GPS or other functions. */ struct vl600_frame_hdr { … } __attribute__((packed)); struct vl600_pkt_hdr { … } __attribute__((packed)); struct vl600_state { … }; static int vl600_bind(struct usbnet *dev, struct usb_interface *intf) { … } static void vl600_unbind(struct usbnet *dev, struct usb_interface *intf) { … } static int vl600_rx_fixup(struct usbnet *dev, struct sk_buff *skb) { … } static struct sk_buff *vl600_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) { … } static const struct driver_info vl600_info = …; static const struct usb_device_id products[] = …; MODULE_DEVICE_TABLE(usb, products); static struct usb_driver lg_vl600_driver = …; module_usb_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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