2012-10-22 14:56:36 +04:00
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/*
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* Copyright (c) 2012 Smith Micro Software, Inc.
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* Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
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*
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* This driver is based on and reuse most of cdc_ncm, which is
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* Copyright (C) ST-Ericsson 2010-2012
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/ethtool.h>
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2012-10-22 14:56:39 +04:00
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#include <linux/if_vlan.h>
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2012-10-22 14:56:36 +04:00
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#include <linux/ip.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/usbnet.h>
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#include <linux/usb/cdc-wdm.h>
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#include <linux/usb/cdc_ncm.h>
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2013-10-31 18:56:10 +04:00
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#include <net/ipv6.h>
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#include <net/addrconf.h>
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2012-10-22 14:56:36 +04:00
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2014-05-11 12:47:12 +04:00
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/* alternative VLAN for IP session 0 if not untagged */
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#define MBIM_IPS0_VID 4094
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2012-10-22 14:56:36 +04:00
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/* driver specific data - must match cdc_ncm usage */
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struct cdc_mbim_state {
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struct cdc_ncm_ctx *ctx;
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atomic_t pmcount;
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struct usb_driver *subdriver;
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2014-05-11 12:47:12 +04:00
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unsigned long _unused;
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unsigned long flags;
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};
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/* flags for the cdc_mbim_state.flags field */
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enum cdc_mbim_flags {
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FLAG_IPS0_VLAN = 1 << 0, /* IP session 0 is tagged */
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2012-10-22 14:56:36 +04:00
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};
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/* using a counter to merge subdriver requests with our own into a combined state */
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static int cdc_mbim_manage_power(struct usbnet *dev, int on)
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{
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struct cdc_mbim_state *info = (void *)&dev->data;
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int rv = 0;
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dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(&info->pmcount), on);
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if ((on && atomic_add_return(1, &info->pmcount) == 1) || (!on && atomic_dec_and_test(&info->pmcount))) {
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/* need autopm_get/put here to ensure the usbcore sees the new value */
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rv = usb_autopm_get_interface(dev->intf);
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dev->intf->needs_remote_wakeup = on;
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2013-11-01 17:18:52 +04:00
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if (!rv)
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usb_autopm_put_interface(dev->intf);
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2012-10-22 14:56:36 +04:00
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}
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2013-11-01 17:18:52 +04:00
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return 0;
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2012-10-22 14:56:36 +04:00
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}
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static int cdc_mbim_wdm_manage_power(struct usb_interface *intf, int status)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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/* can be called while disconnecting */
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if (!dev)
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return 0;
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return cdc_mbim_manage_power(dev, status);
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}
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2014-05-11 12:47:12 +04:00
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static int cdc_mbim_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
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{
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struct usbnet *dev = netdev_priv(netdev);
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struct cdc_mbim_state *info = (void *)&dev->data;
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/* creation of this VLAN is a request to tag IP session 0 */
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if (vid == MBIM_IPS0_VID)
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info->flags |= FLAG_IPS0_VLAN;
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else
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if (vid >= 512) /* we don't map these to MBIM session */
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return -EINVAL;
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return 0;
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}
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static int cdc_mbim_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
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{
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struct usbnet *dev = netdev_priv(netdev);
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struct cdc_mbim_state *info = (void *)&dev->data;
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/* this is a request for an untagged IP session 0 */
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if (vid == MBIM_IPS0_VID)
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info->flags &= ~FLAG_IPS0_VLAN;
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return 0;
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}
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static const struct net_device_ops cdc_mbim_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_vlan_rx_add_vid = cdc_mbim_rx_add_vid,
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.ndo_vlan_rx_kill_vid = cdc_mbim_rx_kill_vid,
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};
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2012-10-22 14:56:36 +04:00
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2014-05-11 12:47:15 +04:00
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/* Change the control interface altsetting and update the .driver_info
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* pointer if the matching entry after changing class codes points to
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* a different struct
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*/
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static int cdc_mbim_set_ctrlalt(struct usbnet *dev, struct usb_interface *intf, u8 alt)
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{
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struct usb_driver *driver = to_usb_driver(intf->dev.driver);
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const struct usb_device_id *id;
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struct driver_info *info;
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int ret;
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ret = usb_set_interface(dev->udev,
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intf->cur_altsetting->desc.bInterfaceNumber,
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alt);
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if (ret)
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return ret;
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id = usb_match_id(intf, driver->id_table);
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if (!id)
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return -ENODEV;
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info = (struct driver_info *)id->driver_info;
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if (info != dev->driver_info) {
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dev_dbg(&intf->dev, "driver_info updated to '%s'\n",
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info->description);
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dev->driver_info = info;
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}
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return 0;
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}
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2012-10-22 14:56:36 +04:00
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static int cdc_mbim_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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struct cdc_ncm_ctx *ctx;
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struct usb_driver *subdriver = ERR_PTR(-ENODEV);
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int ret = -ENODEV;
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2014-05-11 12:47:15 +04:00
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u8 data_altsetting = 1;
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2012-10-22 14:56:36 +04:00
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struct cdc_mbim_state *info = (void *)&dev->data;
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2014-05-11 12:47:15 +04:00
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/* should we change control altsetting on a NCM/MBIM function? */
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if (cdc_ncm_select_altsetting(intf) == CDC_NCM_COMM_ALTSETTING_MBIM) {
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data_altsetting = CDC_NCM_DATA_ALTSETTING_MBIM;
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ret = cdc_mbim_set_ctrlalt(dev, intf, CDC_NCM_COMM_ALTSETTING_MBIM);
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if (ret)
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goto err;
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ret = -ENODEV;
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}
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/* we will hit this for NCM/MBIM functions if prefer_mbim is false */
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2012-10-22 14:56:36 +04:00
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if (!cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
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goto err;
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2015-07-08 14:05:57 +03:00
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ret = cdc_ncm_bind_common(dev, intf, data_altsetting, 0);
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2012-10-22 14:56:36 +04:00
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if (ret)
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goto err;
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ctx = info->ctx;
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/* The MBIM descriptor and the status endpoint are required */
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if (ctx->mbim_desc && dev->status)
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subdriver = usb_cdc_wdm_register(ctx->control,
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&dev->status->desc,
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le16_to_cpu(ctx->mbim_desc->wMaxControlMessage),
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cdc_mbim_wdm_manage_power);
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if (IS_ERR(subdriver)) {
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ret = PTR_ERR(subdriver);
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cdc_ncm_unbind(dev, intf);
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goto err;
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}
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/* can't let usbnet use the interrupt endpoint */
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dev->status = NULL;
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info->subdriver = subdriver;
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/* MBIM cannot do ARP */
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dev->net->flags |= IFF_NOARP;
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2012-10-22 14:56:39 +04:00
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/* no need to put the VLAN tci in the packet headers */
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2014-05-11 12:47:12 +04:00
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dev->net->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_FILTER;
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/* monitor VLAN additions and removals */
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dev->net->netdev_ops = &cdc_mbim_netdev_ops;
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2012-10-22 14:56:36 +04:00
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err:
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return ret;
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}
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static void cdc_mbim_unbind(struct usbnet *dev, struct usb_interface *intf)
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{
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struct cdc_mbim_state *info = (void *)&dev->data;
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struct cdc_ncm_ctx *ctx = info->ctx;
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/* disconnect subdriver from control interface */
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if (info->subdriver && info->subdriver->disconnect)
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info->subdriver->disconnect(ctx->control);
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info->subdriver = NULL;
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/* let NCM unbind clean up both control and data interface */
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cdc_ncm_unbind(dev, intf);
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}
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2014-05-09 16:45:00 +04:00
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/* verify that the ethernet protocol is IPv4 or IPv6 */
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static bool is_ip_proto(__be16 proto)
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{
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switch (proto) {
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case htons(ETH_P_IP):
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case htons(ETH_P_IPV6):
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return true;
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}
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return false;
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}
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2012-10-22 14:56:36 +04:00
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static struct sk_buff *cdc_mbim_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
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{
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struct sk_buff *skb_out;
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struct cdc_mbim_state *info = (void *)&dev->data;
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struct cdc_ncm_ctx *ctx = info->ctx;
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2012-10-22 14:56:39 +04:00
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__le32 sign = cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN);
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u16 tci = 0;
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2014-05-09 16:45:00 +04:00
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bool is_ip;
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2012-10-22 14:56:39 +04:00
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u8 *c;
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2012-10-22 14:56:36 +04:00
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if (!ctx)
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goto error;
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if (skb) {
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2013-04-16 04:17:07 +04:00
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if (skb->len <= ETH_HLEN)
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2012-10-22 14:56:36 +04:00
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goto error;
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2014-05-09 16:45:00 +04:00
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/* Some applications using e.g. packet sockets will
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* bypass the VLAN acceleration and create tagged
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* ethernet frames directly. We primarily look for
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* the accelerated out-of-band tag, but fall back if
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* required
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*/
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skb_reset_mac_header(skb);
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if (vlan_get_tag(skb, &tci) < 0 && skb->len > VLAN_ETH_HLEN &&
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__vlan_get_tag(skb, &tci) == 0) {
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is_ip = is_ip_proto(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
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skb_pull(skb, VLAN_ETH_HLEN);
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} else {
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is_ip = is_ip_proto(eth_hdr(skb)->h_proto);
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skb_pull(skb, ETH_HLEN);
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}
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2014-05-11 12:47:12 +04:00
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/* Is IP session <0> tagged too? */
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if (info->flags & FLAG_IPS0_VLAN) {
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/* drop all untagged packets */
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if (!tci)
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goto error;
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/* map MBIM_IPS0_VID to IPS<0> */
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if (tci == MBIM_IPS0_VID)
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tci = 0;
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}
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2012-10-22 14:56:39 +04:00
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/* mapping VLANs to MBIM sessions:
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2014-05-11 12:47:12 +04:00
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* no tag => IPS session <0> if !FLAG_IPS0_VLAN
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2012-10-22 14:56:39 +04:00
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* 1 - 255 => IPS session <vlanid>
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2012-10-22 14:56:40 +04:00
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* 256 - 511 => DSS session <vlanid - 256>
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2014-05-11 12:47:12 +04:00
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* 512 - 4093 => unsupported, drop
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* 4094 => IPS session <0> if FLAG_IPS0_VLAN
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2012-10-22 14:56:39 +04:00
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*/
|
2014-05-11 12:47:12 +04:00
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2012-10-22 14:56:39 +04:00
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switch (tci & 0x0f00) {
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case 0x0000: /* VLAN ID 0 - 255 */
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2014-05-09 16:45:00 +04:00
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if (!is_ip)
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2012-10-22 14:56:40 +04:00
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goto error;
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c = (u8 *)&sign;
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c[3] = tci;
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break;
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case 0x0100: /* VLAN ID 256 - 511 */
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2014-05-11 12:47:13 +04:00
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if (is_ip)
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goto error;
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2012-10-22 14:56:40 +04:00
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sign = cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN);
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2012-10-22 14:56:39 +04:00
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c = (u8 *)&sign;
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c[3] = tci;
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break;
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default:
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netif_err(dev, tx_err, dev->net,
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"unsupported tci=0x%04x\n", tci);
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goto error;
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}
|
2012-10-22 14:56:36 +04:00
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}
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spin_lock_bh(&ctx->mtx);
|
2013-11-01 14:16:42 +04:00
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skb_out = cdc_ncm_fill_tx_frame(dev, skb, sign);
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2012-10-22 14:56:36 +04:00
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spin_unlock_bh(&ctx->mtx);
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return skb_out;
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error:
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if (skb)
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dev_kfree_skb_any(skb);
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return NULL;
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}
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|
2013-10-31 18:56:10 +04:00
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/* Some devices are known to send Neigbor Solicitation messages and
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* require Neigbor Advertisement replies. The IPv6 core will not
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* respond since IFF_NOARP is set, so we must handle them ourselves.
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*/
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static void do_neigh_solicit(struct usbnet *dev, u8 *buf, u16 tci)
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{
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struct ipv6hdr *iph = (void *)buf;
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struct nd_msg *msg = (void *)(iph + 1);
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struct net_device *netdev;
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struct inet6_dev *in6_dev;
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bool is_router;
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/* we'll only respond to requests from unicast addresses to
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* our solicited node addresses.
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*/
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if (!ipv6_addr_is_solict_mult(&iph->daddr) ||
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!(ipv6_addr_type(&iph->saddr) & IPV6_ADDR_UNICAST))
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* need to send the NA on the VLAN dev, if any */
|
2014-05-03 18:12:47 +04:00
|
|
|
rcu_read_lock();
|
|
|
|
if (tci) {
|
2014-05-09 10:58:05 +04:00
|
|
|
netdev = __vlan_find_dev_deep_rcu(dev->net, htons(ETH_P_8021Q),
|
|
|
|
tci);
|
2014-05-03 18:12:47 +04:00
|
|
|
if (!netdev) {
|
|
|
|
rcu_read_unlock();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
} else {
|
2013-10-31 18:56:10 +04:00
|
|
|
netdev = dev->net;
|
2014-05-03 18:12:47 +04:00
|
|
|
}
|
|
|
|
dev_hold(netdev);
|
|
|
|
rcu_read_unlock();
|
2013-10-31 18:56:10 +04:00
|
|
|
|
|
|
|
in6_dev = in6_dev_get(netdev);
|
|
|
|
if (!in6_dev)
|
2014-05-03 18:12:47 +04:00
|
|
|
goto out;
|
2013-10-31 18:56:10 +04:00
|
|
|
is_router = !!in6_dev->cnf.forwarding;
|
|
|
|
in6_dev_put(in6_dev);
|
|
|
|
|
|
|
|
/* ipv6_stub != NULL if in6_dev_get returned an inet6_dev */
|
2015-09-22 19:57:13 +03:00
|
|
|
ipv6_stub->ndisc_send_na(netdev, &iph->saddr, &msg->target,
|
2013-10-31 18:56:10 +04:00
|
|
|
is_router /* router */,
|
|
|
|
true /* solicited */,
|
|
|
|
false /* override */,
|
|
|
|
true /* inc_opt */);
|
2014-05-03 18:12:47 +04:00
|
|
|
out:
|
|
|
|
dev_put(netdev);
|
2013-10-31 18:56:10 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-10-22 14:56:39 +04:00
|
|
|
static struct sk_buff *cdc_mbim_process_dgram(struct usbnet *dev, u8 *buf, size_t len, u16 tci)
|
2012-10-22 14:56:36 +04:00
|
|
|
{
|
2012-10-22 14:56:40 +04:00
|
|
|
__be16 proto = htons(ETH_P_802_3);
|
2012-10-22 14:56:36 +04:00
|
|
|
struct sk_buff *skb = NULL;
|
|
|
|
|
2014-05-11 12:47:12 +04:00
|
|
|
if (tci < 256 || tci == MBIM_IPS0_VID) { /* IPS session? */
|
2012-10-22 14:56:40 +04:00
|
|
|
if (len < sizeof(struct iphdr))
|
|
|
|
goto err;
|
2012-10-22 14:56:39 +04:00
|
|
|
|
2012-10-22 14:56:40 +04:00
|
|
|
switch (*buf & 0xf0) {
|
|
|
|
case 0x40:
|
|
|
|
proto = htons(ETH_P_IP);
|
|
|
|
break;
|
|
|
|
case 0x60:
|
2013-10-31 18:56:10 +04:00
|
|
|
if (is_neigh_solicit(buf, len))
|
|
|
|
do_neigh_solicit(dev, buf, tci);
|
2012-10-22 14:56:40 +04:00
|
|
|
proto = htons(ETH_P_IPV6);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
goto err;
|
|
|
|
}
|
2012-10-22 14:56:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
2015-03-03 06:54:48 +03:00
|
|
|
eth_zero_addr(eth_hdr(skb)->h_source);
|
2012-10-22 14:56:36 +04:00
|
|
|
memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
|
|
|
|
|
|
|
|
/* add datagram */
|
|
|
|
memcpy(skb_put(skb, len), buf, len);
|
2012-10-22 14:56:39 +04:00
|
|
|
|
|
|
|
/* map MBIM session to VLAN */
|
|
|
|
if (tci)
|
2014-11-19 16:04:57 +03:00
|
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tci);
|
2012-10-22 14:56:36 +04:00
|
|
|
err:
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int cdc_mbim_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
2012-10-22 14:56:39 +04:00
|
|
|
struct cdc_mbim_state *info = (void *)&dev->data;
|
|
|
|
struct cdc_ncm_ctx *ctx = info->ctx;
|
2012-10-22 14:56:36 +04:00
|
|
|
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 */
|
2014-05-16 23:48:25 +04:00
|
|
|
u32 payload = 0;
|
2012-10-22 14:56:39 +04:00
|
|
|
u8 *c;
|
|
|
|
u16 tci;
|
2012-10-22 14:56:36 +04:00
|
|
|
|
|
|
|
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);
|
|
|
|
|
2012-10-22 14:56:39 +04:00
|
|
|
switch (ndp16->dwSignature & cpu_to_le32(0x00ffffff)) {
|
2012-10-22 14:56:36 +04:00
|
|
|
case cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN):
|
2012-10-22 14:56:39 +04:00
|
|
|
c = (u8 *)&ndp16->dwSignature;
|
|
|
|
tci = c[3];
|
2014-05-11 12:47:12 +04:00
|
|
|
/* tag IPS<0> packets too if MBIM_IPS0_VID exists */
|
|
|
|
if (!tci && info->flags & FLAG_IPS0_VLAN)
|
|
|
|
tci = MBIM_IPS0_VID;
|
2012-10-22 14:56:36 +04:00
|
|
|
break;
|
2012-10-22 14:56:40 +04:00
|
|
|
case cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN):
|
|
|
|
c = (u8 *)&ndp16->dwSignature;
|
|
|
|
tci = c[3] + 256;
|
|
|
|
break;
|
2012-10-22 14:56:36 +04:00
|
|
|
default:
|
|
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
|
|
"unsupported NDP signature <0x%08x>\n",
|
|
|
|
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 */
|
2012-10-22 14:56:39 +04:00
|
|
|
if (((offset + len) > skb_in->len) || (len > ctx->rx_max)) {
|
2012-10-22 14:56:36 +04:00
|
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
|
|
"invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
|
|
|
|
x, offset, len, skb_in);
|
|
|
|
if (!x)
|
|
|
|
goto err_ndp;
|
|
|
|
break;
|
|
|
|
} else {
|
2012-10-22 14:56:39 +04:00
|
|
|
skb = cdc_mbim_process_dgram(dev, skb_in->data + offset, len, tci);
|
2012-10-22 14:56:36 +04:00
|
|
|
if (!skb)
|
|
|
|
goto error;
|
|
|
|
usbnet_skb_return(dev, skb);
|
2014-05-16 23:48:25 +04:00
|
|
|
payload += len; /* count payload bytes in this NTB */
|
2012-10-22 14:56:36 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
err_ndp:
|
|
|
|
/* are there more NDPs to process? */
|
|
|
|
ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
|
|
|
|
if (ndpoffset && loopcount--)
|
|
|
|
goto next_ndp;
|
|
|
|
|
2014-05-16 23:48:25 +04:00
|
|
|
/* update stats */
|
|
|
|
ctx->rx_overhead += skb_in->len - payload;
|
|
|
|
ctx->rx_ntbs++;
|
|
|
|
|
2012-10-22 14:56:36 +04:00
|
|
|
return 1;
|
|
|
|
error:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int cdc_mbim_suspend(struct usb_interface *intf, pm_message_t message)
|
|
|
|
{
|
2013-11-01 17:18:56 +04:00
|
|
|
int ret = -ENODEV;
|
2012-10-22 14:56:36 +04:00
|
|
|
struct usbnet *dev = usb_get_intfdata(intf);
|
|
|
|
struct cdc_mbim_state *info = (void *)&dev->data;
|
|
|
|
struct cdc_ncm_ctx *ctx = info->ctx;
|
|
|
|
|
2013-11-01 17:18:56 +04:00
|
|
|
if (!ctx)
|
2012-10-22 14:56:36 +04:00
|
|
|
goto error;
|
|
|
|
|
2013-03-15 08:08:56 +04:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
2012-10-22 14:56:36 +04:00
|
|
|
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);
|
2013-11-01 17:18:55 +04:00
|
|
|
if (ret < 0 && callsub)
|
2012-10-22 14:56:36 +04:00
|
|
|
info->subdriver->suspend(intf, PMSG_SUSPEND);
|
|
|
|
err:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct driver_info cdc_mbim_info = {
|
2013-01-23 04:57:02 +04:00
|
|
|
.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
|
2013-10-31 18:56:11 +04:00
|
|
|
* 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.
|
2013-01-23 04:57:02 +04:00
|
|
|
*/
|
|
|
|
static const struct driver_info cdc_mbim_info_zlp = {
|
2012-10-22 14:56:36 +04:00
|
|
|
.description = "CDC MBIM",
|
2013-01-21 09:50:39 +04:00
|
|
|
.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN | FLAG_SEND_ZLP,
|
2012-10-22 14:56:36 +04:00
|
|
|
.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,
|
|
|
|
};
|
|
|
|
|
|
|
|
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,
|
|
|
|
},
|
2013-10-31 18:56:11 +04:00
|
|
|
/* 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,
|
2013-08-26 02:02:23 +04:00
|
|
|
},
|
2013-10-31 18:56:11 +04:00
|
|
|
/* default entry */
|
2012-10-22 14:56:36 +04:00
|
|
|
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
|
2013-10-31 18:56:11 +04:00
|
|
|
.driver_info = (unsigned long)&cdc_mbim_info_zlp,
|
2012-10-22 14:56:36 +04:00
|
|
|
},
|
|
|
|
{
|
|
|
|
},
|
|
|
|
};
|
|
|
|
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");
|