/*
   * Copyright (c) 2012  Smith Micro Software, Inc.
   * Copyright (c) 2012  Bjørn Mork <bjorn@mork.no>
   *
   * This driver is based on and reuse most of cdc_ncm, which is
   * Copyright (C) ST-Ericsson 2010-2012
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * version 2 as published by the Free Software Foundation.
   */
  
  #include <linux/module.h>
  #include <linux/netdevice.h>
  #include <linux/ethtool.h>
  #include <linux/if_vlan.h>
  #include <linux/ip.h>
  #include <linux/mii.h>
  #include <linux/usb.h>
  #include <linux/usb/cdc.h>
  #include <linux/usb/usbnet.h>
  #include <linux/usb/cdc-wdm.h>
  #include <linux/usb/cdc_ncm.h>
  #include <net/ipv6.h>
  #include <net/addrconf.h>
  
  /* alternative VLAN for IP session 0 if not untagged */
  #define MBIM_IPS0_VID	4094
  
  /* driver specific data - must match cdc_ncm usage */
  struct cdc_mbim_state {
  	struct cdc_ncm_ctx *ctx;
  	atomic_t pmcount;
  	struct usb_driver *subdriver;
  	unsigned long _unused;
  	unsigned long flags;
  };
  
  /* flags for the cdc_mbim_state.flags field */
  enum cdc_mbim_flags {
  	FLAG_IPS0_VLAN = 1 << 0,	/* IP session 0 is tagged  */
  };
  
  /* using a counter to merge subdriver requests with our own into a combined state */
  static int cdc_mbim_manage_power(struct usbnet *dev, int on)
  {
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	int rv = 0;
  
  	dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d
  ", __func__, atomic_read(&info->pmcount), on);
  
  	if ((on && atomic_add_return(1, &info->pmcount) == 1) || (!on && atomic_dec_and_test(&info->pmcount))) {
  		/* need autopm_get/put here to ensure the usbcore sees the new value */
  		rv = usb_autopm_get_interface(dev->intf);
  		dev->intf->needs_remote_wakeup = on;
  		if (!rv)
  			usb_autopm_put_interface(dev->intf);
  	}
  	return 0;
  }
  
  static int cdc_mbim_wdm_manage_power(struct usb_interface *intf, int status)
  {
  	struct usbnet *dev = usb_get_intfdata(intf);
  
  	/* can be called while disconnecting */
  	if (!dev)
  		return 0;
  
  	return cdc_mbim_manage_power(dev, status);
  }
  
  static int cdc_mbim_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
  {
  	struct usbnet *dev = netdev_priv(netdev);
  	struct cdc_mbim_state *info = (void *)&dev->data;
  
  	/* creation of this VLAN is a request to tag IP session 0 */
  	if (vid == MBIM_IPS0_VID)
  		info->flags |= FLAG_IPS0_VLAN;
  	else
  		if (vid >= 512)	/* we don't map these to MBIM session */
  			return -EINVAL;
  	return 0;
  }
  
  static int cdc_mbim_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
  {
  	struct usbnet *dev = netdev_priv(netdev);
  	struct cdc_mbim_state *info = (void *)&dev->data;
  
  	/* this is a request for an untagged IP session 0 */
  	if (vid == MBIM_IPS0_VID)
  		info->flags &= ~FLAG_IPS0_VLAN;
  	return 0;
  }
  
  static const struct net_device_ops cdc_mbim_netdev_ops = {
  	.ndo_open             = usbnet_open,
  	.ndo_stop             = usbnet_stop,
  	.ndo_start_xmit       = usbnet_start_xmit,
  	.ndo_tx_timeout       = usbnet_tx_timeout,
  	.ndo_change_mtu       = cdc_ncm_change_mtu,
  	.ndo_set_mac_address  = eth_mac_addr,
  	.ndo_validate_addr    = eth_validate_addr,
  	.ndo_vlan_rx_add_vid  = cdc_mbim_rx_add_vid,
  	.ndo_vlan_rx_kill_vid = cdc_mbim_rx_kill_vid,
  };
  
  /* Change the control interface altsetting and update the .driver_info
   * pointer if the matching entry after changing class codes points to
   * a different struct
   */
  static int cdc_mbim_set_ctrlalt(struct usbnet *dev, struct usb_interface *intf, u8 alt)
  {
  	struct usb_driver *driver = to_usb_driver(intf->dev.driver);
  	const struct usb_device_id *id;
  	struct driver_info *info;
  	int ret;
  
  	ret = usb_set_interface(dev->udev,
  				intf->cur_altsetting->desc.bInterfaceNumber,
  				alt);
  	if (ret)
  		return ret;
  
  	id = usb_match_id(intf, driver->id_table);
  	if (!id)
  		return -ENODEV;
  
  	info = (struct driver_info *)id->driver_info;
  	if (info != dev->driver_info) {
  		dev_dbg(&intf->dev, "driver_info updated to '%s'
  ",
  			info->description);
  		dev->driver_info = info;
  	}
  	return 0;
  }
  
  static int cdc_mbim_bind(struct usbnet *dev, struct usb_interface *intf)
  {
  	struct cdc_ncm_ctx *ctx;
  	struct usb_driver *subdriver = ERR_PTR(-ENODEV);
  	int ret = -ENODEV;
  	u8 data_altsetting = 1;
  	struct cdc_mbim_state *info = (void *)&dev->data;
  
  	/* should we change control altsetting on a NCM/MBIM function? */
  	if (cdc_ncm_select_altsetting(intf) == CDC_NCM_COMM_ALTSETTING_MBIM) {
  		data_altsetting = CDC_NCM_DATA_ALTSETTING_MBIM;
  		ret = cdc_mbim_set_ctrlalt(dev, intf, CDC_NCM_COMM_ALTSETTING_MBIM);
  		if (ret)
  			goto err;
  		ret = -ENODEV;
  	}
  
  	/* we will hit this for NCM/MBIM functions if prefer_mbim is false */
  	if (!cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
  		goto err;
  
  	ret = cdc_ncm_bind_common(dev, intf, data_altsetting, dev->driver_info->data);
  	if (ret)
  		goto err;
  
  	ctx = info->ctx;
  
  	/* The MBIM descriptor and the status endpoint are required */
  	if (ctx->mbim_desc && dev->status)
  		subdriver = usb_cdc_wdm_register(ctx->control,
  						 &dev->status->desc,
  						 le16_to_cpu(ctx->mbim_desc->wMaxControlMessage),
  						 cdc_mbim_wdm_manage_power);
  	if (IS_ERR(subdriver)) {
  		ret = PTR_ERR(subdriver);
  		cdc_ncm_unbind(dev, intf);
  		goto err;
  	}
  
  	/* can't let usbnet use the interrupt endpoint */
  	dev->status = NULL;
  	info->subdriver = subdriver;
  
  	/* MBIM cannot do ARP */
  	dev->net->flags |= IFF_NOARP;
  
  	/* no need to put the VLAN tci in the packet headers */
  	dev->net->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_FILTER;
  
  	/* monitor VLAN additions and removals */
  	dev->net->netdev_ops = &cdc_mbim_netdev_ops;
  err:
  	return ret;
  }
  
  static void cdc_mbim_unbind(struct usbnet *dev, struct usb_interface *intf)
  {
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	struct cdc_ncm_ctx *ctx = info->ctx;
  
  	/* disconnect subdriver from control interface */
  	if (info->subdriver && info->subdriver->disconnect)
  		info->subdriver->disconnect(ctx->control);
  	info->subdriver = NULL;
  
  	/* let NCM unbind clean up both control and data interface */
  	cdc_ncm_unbind(dev, intf);
  }
  
  /* verify that the ethernet protocol is IPv4 or IPv6 */
  static bool is_ip_proto(__be16 proto)
  {
  	switch (proto) {
  	case htons(ETH_P_IP):
  	case htons(ETH_P_IPV6):
  		return true;
  	}
  	return false;
  }
  
  static struct sk_buff *cdc_mbim_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
  {
  	struct sk_buff *skb_out;
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	struct cdc_ncm_ctx *ctx = info->ctx;
  	__le32 sign = cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN);
  	u16 tci = 0;
  	bool is_ip;
  	u8 *c;
  
  	if (!ctx)
  		goto error;
  
  	if (skb) {
  		if (skb->len <= ETH_HLEN)
  			goto error;
  
  		/* Some applications using e.g. packet sockets will
  		 * bypass the VLAN acceleration and create tagged
  		 * ethernet frames directly.  We primarily look for
  		 * the accelerated out-of-band tag, but fall back if
  		 * required
  		 */
  		skb_reset_mac_header(skb);
  		if (vlan_get_tag(skb, &tci) < 0 && skb->len > VLAN_ETH_HLEN &&
  		    __vlan_get_tag(skb, &tci) == 0) {
  			is_ip = is_ip_proto(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
  			skb_pull(skb, VLAN_ETH_HLEN);
  		} else {
  			is_ip = is_ip_proto(eth_hdr(skb)->h_proto);
  			skb_pull(skb, ETH_HLEN);
  		}
  
  		/* Is IP session <0> tagged too? */
  		if (info->flags & FLAG_IPS0_VLAN) {
  			/* drop all untagged packets */
  			if (!tci)
  				goto error;
  			/* map MBIM_IPS0_VID to IPS<0> */
  			if (tci == MBIM_IPS0_VID)
  				tci = 0;
  		}
  
  		/* mapping VLANs to MBIM sessions:
  		 *   no tag     => IPS session <0> if !FLAG_IPS0_VLAN
  		 *   1 - 255    => IPS session <vlanid>
  		 *   256 - 511  => DSS session <vlanid - 256>
  		 *   512 - 4093 => unsupported, drop
  		 *   4094       => IPS session <0> if FLAG_IPS0_VLAN
  		 */
  
  		switch (tci & 0x0f00) {
  		case 0x0000: /* VLAN ID 0 - 255 */
  			if (!is_ip)
  				goto error;
  			c = (u8 *)&sign;
  			c[3] = tci;
  			break;
  		case 0x0100: /* VLAN ID 256 - 511 */
  			if (is_ip)
  				goto error;
  			sign = cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN);
  			c = (u8 *)&sign;
  			c[3] = tci;
  			break;
  		default:
  			netif_err(dev, tx_err, dev->net,
  				  "unsupported tci=0x%04x
  ", tci);
  			goto error;
  		}
  	}
  
  	spin_lock_bh(&ctx->mtx);
  	skb_out = cdc_ncm_fill_tx_frame(dev, skb, sign);
  	spin_unlock_bh(&ctx->mtx);
  	return skb_out;
  
  error:
  	if (skb)
  		dev_kfree_skb_any(skb);
  
  	return NULL;
  }
  
  /* Some devices are known to send Neigbor Solicitation messages and
   * require Neigbor Advertisement replies.  The IPv6 core will not
   * respond since IFF_NOARP is set, so we must handle them ourselves.
   */
  static void do_neigh_solicit(struct usbnet *dev, u8 *buf, u16 tci)
  {
  	struct ipv6hdr *iph = (void *)buf;
  	struct nd_msg *msg = (void *)(iph + 1);
  	struct net_device *netdev;
  	struct inet6_dev *in6_dev;
  	bool is_router;
  
  	/* we'll only respond to requests from unicast addresses to
  	 * our solicited node addresses.
  	 */
  	if (!ipv6_addr_is_solict_mult(&iph->daddr) ||
  	    !(ipv6_addr_type(&iph->saddr) & IPV6_ADDR_UNICAST))
  		return;
  
  	/* need to send the NA on the VLAN dev, if any */
  	rcu_read_lock();
  	if (tci) {
  		netdev = __vlan_find_dev_deep_rcu(dev->net, htons(ETH_P_8021Q),
  						  tci);
  		if (!netdev) {
  			rcu_read_unlock();
  			return;
  		}
  	} else {
  		netdev = dev->net;
  	}
  	dev_hold(netdev);
  	rcu_read_unlock();
  
  	in6_dev = in6_dev_get(netdev);
  	if (!in6_dev)
  		goto out;
  	is_router = !!in6_dev->cnf.forwarding;
  	in6_dev_put(in6_dev);
  
  	/* ipv6_stub != NULL if in6_dev_get returned an inet6_dev */
  	ipv6_stub->ndisc_send_na(netdev, &iph->saddr, &msg->target,
  				 is_router /* router */,
  				 true /* solicited */,
  				 false /* override */,
  				 true /* inc_opt */);
  out:
  	dev_put(netdev);
  }
  
  static bool is_neigh_solicit(u8 *buf, size_t len)
  {
  	struct ipv6hdr *iph = (void *)buf;
  	struct nd_msg *msg = (void *)(iph + 1);
  
  	return (len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) &&
  		iph->nexthdr == IPPROTO_ICMPV6 &&
  		msg->icmph.icmp6_code == 0 &&
  		msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION);
  }
  
  
  static struct sk_buff *cdc_mbim_process_dgram(struct usbnet *dev, u8 *buf, size_t len, u16 tci)
  {
  	__be16 proto = htons(ETH_P_802_3);
  	struct sk_buff *skb = NULL;
  
  	if (tci < 256 || tci == MBIM_IPS0_VID) { /* IPS session? */
  		if (len < sizeof(struct iphdr))
  			goto err;
  
  		switch (*buf & 0xf0) {
  		case 0x40:
  			proto = htons(ETH_P_IP);
  			break;
  		case 0x60:
  			if (is_neigh_solicit(buf, len))
  				do_neigh_solicit(dev, buf, tci);
  			proto = htons(ETH_P_IPV6);
  			break;
  		default:
  			goto err;
  		}
  	}
  
  	skb = netdev_alloc_skb_ip_align(dev->net,  len + ETH_HLEN);
  	if (!skb)
  		goto err;
  
  	/* add an ethernet header */
  	skb_put(skb, ETH_HLEN);
  	skb_reset_mac_header(skb);
  	eth_hdr(skb)->h_proto = proto;
  	eth_zero_addr(eth_hdr(skb)->h_source);
  	memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
  
  	/* add datagram */
  	memcpy(skb_put(skb, len), buf, len);
  
  	/* map MBIM session to VLAN */
  	if (tci)
  		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tci);
  err:
  	return skb;
  }
  
  static int cdc_mbim_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
  {
  	struct sk_buff *skb;
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	struct cdc_ncm_ctx *ctx = info->ctx;
  	int len;
  	int nframes;
  	int x;
  	int offset;
  	struct usb_cdc_ncm_ndp16 *ndp16;
  	struct usb_cdc_ncm_dpe16 *dpe16;
  	int ndpoffset;
  	int loopcount = 50; /* arbitrary max preventing infinite loop */
  	u32 payload = 0;
  	u8 *c;
  	u16 tci;
  
  	ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
  	if (ndpoffset < 0)
  		goto error;
  
  next_ndp:
  	nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
  	if (nframes < 0)
  		goto error;
  
  	ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
  
  	switch (ndp16->dwSignature & cpu_to_le32(0x00ffffff)) {
  	case cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN):
  		c = (u8 *)&ndp16->dwSignature;
  		tci = c[3];
  		/* tag IPS<0> packets too if MBIM_IPS0_VID exists */
  		if (!tci && info->flags & FLAG_IPS0_VLAN)
  			tci = MBIM_IPS0_VID;
  		break;
  	case cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN):
  		c = (u8 *)&ndp16->dwSignature;
  		tci = c[3] + 256;
  		break;
  	default:
  		netif_dbg(dev, rx_err, dev->net,
  			  "unsupported NDP signature <0x%08x>
  ",
  			  le32_to_cpu(ndp16->dwSignature));
  		goto err_ndp;
  
  	}
  
  	dpe16 = ndp16->dpe16;
  	for (x = 0; x < nframes; x++, dpe16++) {
  		offset = le16_to_cpu(dpe16->wDatagramIndex);
  		len = le16_to_cpu(dpe16->wDatagramLength);
  
  		/*
  		 * CDC NCM ch. 3.7
  		 * All entries after first NULL entry are to be ignored
  		 */
  		if ((offset == 0) || (len == 0)) {
  			if (!x)
  				goto err_ndp; /* empty NTB */
  			break;
  		}
  
  		/* sanity checking */
  		if (((offset + len) > skb_in->len) || (len > ctx->rx_max)) {
  			netif_dbg(dev, rx_err, dev->net,
  				  "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p
  ",
  				  x, offset, len, skb_in);
  			if (!x)
  				goto err_ndp;
  			break;
  		} else {
  			skb = cdc_mbim_process_dgram(dev, skb_in->data + offset, len, tci);
  			if (!skb)
  				goto error;
  			usbnet_skb_return(dev, skb);
  			payload += len;	/* count payload bytes in this NTB */
  		}
  	}
  err_ndp:
  	/* are there more NDPs to process? */
  	ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
  	if (ndpoffset && loopcount--)
  		goto next_ndp;
  
  	/* update stats */
  	ctx->rx_overhead += skb_in->len - payload;
  	ctx->rx_ntbs++;
  
  	return 1;
  error:
  	return 0;
  }
  
  static int cdc_mbim_suspend(struct usb_interface *intf, pm_message_t message)
  {
  	int ret = -ENODEV;
  	struct usbnet *dev = usb_get_intfdata(intf);
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	struct cdc_ncm_ctx *ctx = info->ctx;
  
  	if (!ctx)
  		goto error;
  
  	/*
  	 * Both usbnet_suspend() and subdriver->suspend() MUST return 0
  	 * in system sleep context, otherwise, the resume callback has
  	 * to recover device from previous suspend failure.
  	 */
  	ret = usbnet_suspend(intf, message);
  	if (ret < 0)
  		goto error;
  
  	if (intf == ctx->control && info->subdriver && info->subdriver->suspend)
  		ret = info->subdriver->suspend(intf, message);
  	if (ret < 0)
  		usbnet_resume(intf);
  
  error:
  	return ret;
  }
  
  static int cdc_mbim_resume(struct usb_interface *intf)
  {
  	int  ret = 0;
  	struct usbnet *dev = usb_get_intfdata(intf);
  	struct cdc_mbim_state *info = (void *)&dev->data;
  	struct cdc_ncm_ctx *ctx = info->ctx;
  	bool callsub = (intf == ctx->control && info->subdriver && info->subdriver->resume);
  
  	if (callsub)
  		ret = info->subdriver->resume(intf);
  	if (ret < 0)
  		goto err;
  	ret = usbnet_resume(intf);
  	if (ret < 0 && callsub)
  		info->subdriver->suspend(intf, PMSG_SUSPEND);
  err:
  	return ret;
  }
  
  static const struct driver_info cdc_mbim_info = {
  	.description = "CDC MBIM",
  	.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
  	.bind = cdc_mbim_bind,
  	.unbind = cdc_mbim_unbind,
  	.manage_power = cdc_mbim_manage_power,
  	.rx_fixup = cdc_mbim_rx_fixup,
  	.tx_fixup = cdc_mbim_tx_fixup,
  };
  
  /* MBIM and NCM devices should not need a ZLP after NTBs with
   * dwNtbOutMaxSize length. Nevertheless, a number of devices from
   * different vendor IDs will fail unless we send ZLPs, forcing us
   * to make this the default.
   *
   * This default may cause a performance penalty for spec conforming
   * devices wanting to take advantage of optimizations possible without
   * ZLPs.  A whitelist is added in an attempt to avoid this for devices
   * known to conform to the MBIM specification.
   *
   * All known devices supporting NCM compatibility mode are also
   * conforming to the NCM and MBIM specifications. For this reason, the
   * NCM subclass entry is also in the ZLP whitelist.
   */
  static const struct driver_info cdc_mbim_info_zlp = {
  	.description = "CDC MBIM",
  	.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN | FLAG_SEND_ZLP,
  	.bind = cdc_mbim_bind,
  	.unbind = cdc_mbim_unbind,
  	.manage_power = cdc_mbim_manage_power,
  	.rx_fixup = cdc_mbim_rx_fixup,
  	.tx_fixup = cdc_mbim_tx_fixup,
  };
  
  /* The spefication explicitly allows NDPs to be placed anywhere in the
   * frame, but some devices fail unless the NDP is placed after the IP
   * packets.  Using the CDC_NCM_FLAG_NDP_TO_END flags to force this
   * behaviour.
   *
   * Note: The current implementation of this feature restricts each NTB
   * to a single NDP, implying that multiplexed sessions cannot share an
   * NTB. This might affect performace for multiplexed sessions.
   */
  static const struct driver_info cdc_mbim_info_ndp_to_end = {
  	.description = "CDC MBIM",
  	.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
  	.bind = cdc_mbim_bind,
  	.unbind = cdc_mbim_unbind,
  	.manage_power = cdc_mbim_manage_power,
  	.rx_fixup = cdc_mbim_rx_fixup,
  	.tx_fixup = cdc_mbim_tx_fixup,
  	.data = CDC_NCM_FLAG_NDP_TO_END,
  };
  
  static const struct usb_device_id mbim_devs[] = {
  	/* This duplicate NCM entry is intentional. MBIM devices can
  	 * be disguised as NCM by default, and this is necessary to
  	 * allow us to bind the correct driver_info to such devices.
  	 *
  	 * bind() will sort out this for us, selecting the correct
  	 * entry and reject the other
  	 */
  	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
  	  .driver_info = (unsigned long)&cdc_mbim_info,
  	},
  	/* ZLP conformance whitelist: All Ericsson MBIM devices */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bdb, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  	  .driver_info = (unsigned long)&cdc_mbim_info,
  	},
  
  	/* Some Huawei devices, ME906s-158 (12d1:15c1) and E3372
  	 * (12d1:157d), are known to fail unless the NDP is placed
  	 * after the IP packets.  Applying the quirk to all Huawei
  	 * devices is broader than necessary, but harmless.
  	 */
  	{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  	  .driver_info = (unsigned long)&cdc_mbim_info_ndp_to_end,
  	},
  	/* default entry */
  	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  	  .driver_info = (unsigned long)&cdc_mbim_info_zlp,
  	},
  	{
  	},
  };
  MODULE_DEVICE_TABLE(usb, mbim_devs);
  
  static struct usb_driver cdc_mbim_driver = {
  	.name = "cdc_mbim",
  	.id_table = mbim_devs,
  	.probe = usbnet_probe,
  	.disconnect = usbnet_disconnect,
  	.suspend = cdc_mbim_suspend,
  	.resume = cdc_mbim_resume,
  	.reset_resume =	cdc_mbim_resume,
  	.supports_autosuspend = 1,
  	.disable_hub_initiated_lpm = 1,
  };
  module_usb_driver(cdc_mbim_driver);
  
  MODULE_AUTHOR("Greg Suarez <gsuarez@smithmicro.com>");
  MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
  MODULE_DESCRIPTION("USB CDC MBIM host driver");
  MODULE_LICENSE("GPL");