linux/drivers/net/usb/cdc_eem.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * USB CDC EEM network interface driver
 * Copyright (C) 2009 Oberthur Technologies
 * by Omar Laazimani, Olivier Condemine
 */

#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ctype.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/crc32.h>
#include <linux/usb/cdc.h>
#include <linux/usb/usbnet.h>
#include <linux/gfp.h>
#include <linux/if_vlan.h>


/*
 * This driver is an implementation of the CDC "Ethernet Emulation
 * Model" (EEM) specification, which encapsulates Ethernet frames
 * for transport over USB using a simpler USB device model than the
 * previous CDC "Ethernet Control Model" (ECM, or "CDC Ethernet").
 *
 * For details, see https://usb.org/sites/default/files/CDC_EEM10.pdf
 *
 * This version has been tested with GIGAntIC WuaoW SIM Smart Card on 2.6.24,
 * 2.6.27 and 2.6.30rc2 kernel.
 * It has also been validated on Openmoko Om 2008.12 (based on 2.6.24 kernel).
 * build on 23-April-2009
 */

#define EEM_HEAD …

/*-------------------------------------------------------------------------*/

static void eem_linkcmd_complete(struct urb *urb)
{ … }

static void eem_linkcmd(struct usbnet *dev, struct sk_buff *skb)
{ … }

static int eem_bind(struct usbnet *dev, struct usb_interface *intf)
{ … }

/*
 * EEM permits packing multiple Ethernet frames into USB transfers
 * (a "bundle"), but for TX we don't try to do that.
 */
static struct sk_buff *eem_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
				       gfp_t flags)
{ … }

static int eem_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{ … }

static const struct driver_info eem_info = …;

/*-------------------------------------------------------------------------*/

static const struct usb_device_id products[] = …;
MODULE_DEVICE_TABLE(usb, products);

static struct usb_driver eem_driver = …;

module_usb_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;