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![Bjørn Mork](/assets/img/avatar_default.png)
header_desc was completely unused and union_desc was never used outside cdc_ncm_bind_common. Cc: Alexey Orishko <alexey.orishko@gmail.com> Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
1277 lines
36 KiB
C
1277 lines
36 KiB
C
/*
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* cdc_ncm.c
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*
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* Copyright (C) ST-Ericsson 2010-2012
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* Contact: Alexey Orishko <alexey.orishko@stericsson.com>
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* Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
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*
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* USB Host Driver for Network Control Model (NCM)
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* http://www.usb.org/developers/devclass_docs/NCM10.zip
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*
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* The NCM encoding, decoding and initialization logic
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* derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose this file to be licensed under the terms
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* of the GNU General Public License (GPL) Version 2 or the 2-clause
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* BSD license listed below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/ctype.h>
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#include <linux/ethtool.h>
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#include <linux/workqueue.h>
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#include <linux/mii.h>
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#include <linux/crc32.h>
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#include <linux/usb.h>
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#include <linux/hrtimer.h>
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#include <linux/atomic.h>
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#include <linux/usb/usbnet.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/cdc_ncm.h>
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#define DRIVER_VERSION "14-Mar-2012"
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#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
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static bool prefer_mbim = true;
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#else
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static bool prefer_mbim;
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#endif
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module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
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static void cdc_ncm_txpath_bh(unsigned long param);
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static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
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static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
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static struct usb_driver cdc_ncm_driver;
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static void
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cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
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{
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struct usbnet *dev = netdev_priv(net);
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strlcpy(info->driver, dev->driver_name, sizeof(info->driver));
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strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
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strlcpy(info->fw_version, dev->driver_info->description,
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sizeof(info->fw_version));
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usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
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}
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static u8 cdc_ncm_setup(struct usbnet *dev)
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{
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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struct usb_cdc_ncm_ntb_parameters ncm_parm;
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u32 val;
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u8 flags;
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u8 iface_no;
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int err;
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int eth_hlen;
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u16 ntb_fmt_supported;
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u32 min_dgram_size;
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u32 min_hdr_size;
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iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
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err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
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USB_TYPE_CLASS | USB_DIR_IN
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|USB_RECIP_INTERFACE,
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0, iface_no, &ncm_parm,
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sizeof(ncm_parm));
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if (err < 0) {
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pr_debug("failed GET_NTB_PARAMETERS\n");
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return 1;
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}
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/* read correct set of parameters according to device mode */
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ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize);
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ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize);
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ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder);
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ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor);
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ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment);
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/* devices prior to NCM Errata shall set this field to zero */
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ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams);
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ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported);
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eth_hlen = ETH_HLEN;
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min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
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min_hdr_size = CDC_NCM_MIN_HDR_SIZE;
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if (ctx->mbim_desc != NULL) {
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flags = ctx->mbim_desc->bmNetworkCapabilities;
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eth_hlen = 0;
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min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE;
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min_hdr_size = 0;
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} else if (ctx->func_desc != NULL) {
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flags = ctx->func_desc->bmNetworkCapabilities;
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} else {
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flags = 0;
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}
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pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u "
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"wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u "
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"wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
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ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
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ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags);
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/* max count of tx datagrams */
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if ((ctx->tx_max_datagrams == 0) ||
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(ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
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ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
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/* verify maximum size of received NTB in bytes */
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if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) {
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pr_debug("Using min receive length=%d\n",
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USB_CDC_NCM_NTB_MIN_IN_SIZE);
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ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE;
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}
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if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) {
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pr_debug("Using default maximum receive length=%d\n",
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CDC_NCM_NTB_MAX_SIZE_RX);
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ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX;
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}
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/* inform device about NTB input size changes */
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if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) {
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__le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
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err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
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USB_TYPE_CLASS | USB_DIR_OUT
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| USB_RECIP_INTERFACE,
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0, iface_no, &dwNtbInMaxSize, 4);
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if (err < 0)
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pr_debug("Setting NTB Input Size failed\n");
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}
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/* verify maximum size of transmitted NTB in bytes */
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if ((ctx->tx_max <
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(min_hdr_size + min_dgram_size)) ||
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(ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) {
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pr_debug("Using default maximum transmit length=%d\n",
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CDC_NCM_NTB_MAX_SIZE_TX);
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ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
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/* Adding a pad byte here simplifies the handling in
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* cdc_ncm_fill_tx_frame, by making tx_max always
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* represent the real skb max size.
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*/
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if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0)
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ctx->tx_max++;
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}
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/*
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* verify that the structure alignment is:
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* - power of two
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* - not greater than the maximum transmit length
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* - not less than four bytes
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*/
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val = ctx->tx_ndp_modulus;
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if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
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(val != ((-val) & val)) || (val >= ctx->tx_max)) {
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pr_debug("Using default alignment: 4 bytes\n");
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ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
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}
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/*
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* verify that the payload alignment is:
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* - power of two
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* - not greater than the maximum transmit length
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* - not less than four bytes
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*/
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val = ctx->tx_modulus;
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if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
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(val != ((-val) & val)) || (val >= ctx->tx_max)) {
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pr_debug("Using default transmit modulus: 4 bytes\n");
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ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
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}
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/* verify the payload remainder */
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if (ctx->tx_remainder >= ctx->tx_modulus) {
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pr_debug("Using default transmit remainder: 0 bytes\n");
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ctx->tx_remainder = 0;
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}
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/* adjust TX-remainder according to NCM specification. */
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ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) &
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(ctx->tx_modulus - 1));
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/* additional configuration */
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/* set CRC Mode */
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if (flags & USB_CDC_NCM_NCAP_CRC_MODE) {
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err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
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USB_TYPE_CLASS | USB_DIR_OUT
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| USB_RECIP_INTERFACE,
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USB_CDC_NCM_CRC_NOT_APPENDED,
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iface_no, NULL, 0);
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if (err < 0)
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pr_debug("Setting CRC mode off failed\n");
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}
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/* set NTB format, if both formats are supported */
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if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) {
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err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
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USB_TYPE_CLASS | USB_DIR_OUT
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| USB_RECIP_INTERFACE,
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USB_CDC_NCM_NTB16_FORMAT,
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iface_no, NULL, 0);
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if (err < 0)
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pr_debug("Setting NTB format to 16-bit failed\n");
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}
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ctx->max_datagram_size = min_dgram_size;
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/* set Max Datagram Size (MTU) */
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if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) {
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__le16 max_datagram_size;
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u16 eth_max_sz;
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if (ctx->ether_desc != NULL)
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eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
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else if (ctx->mbim_desc != NULL)
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eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
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else
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goto max_dgram_err;
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err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
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USB_TYPE_CLASS | USB_DIR_IN
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| USB_RECIP_INTERFACE,
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0, iface_no, &max_datagram_size, 2);
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if (err < 0) {
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pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n",
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min_dgram_size);
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} else {
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ctx->max_datagram_size =
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le16_to_cpu(max_datagram_size);
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/* Check Eth descriptor value */
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if (ctx->max_datagram_size > eth_max_sz)
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ctx->max_datagram_size = eth_max_sz;
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if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE)
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ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE;
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if (ctx->max_datagram_size < min_dgram_size)
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ctx->max_datagram_size = min_dgram_size;
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/* if value changed, update device */
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if (ctx->max_datagram_size !=
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le16_to_cpu(max_datagram_size)) {
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max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
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err = usbnet_write_cmd(dev,
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USB_CDC_SET_MAX_DATAGRAM_SIZE,
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USB_TYPE_CLASS | USB_DIR_OUT
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| USB_RECIP_INTERFACE,
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0,
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iface_no, &max_datagram_size,
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2);
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if (err < 0)
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pr_debug("SET_MAX_DGRAM_SIZE failed\n");
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}
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}
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}
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max_dgram_err:
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if (dev->net->mtu != (ctx->max_datagram_size - eth_hlen))
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dev->net->mtu = ctx->max_datagram_size - eth_hlen;
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return 0;
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}
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static void
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cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
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{
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struct usb_host_endpoint *e, *in = NULL, *out = NULL;
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u8 ep;
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for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
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e = intf->cur_altsetting->endpoint + ep;
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switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_INT:
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if (usb_endpoint_dir_in(&e->desc)) {
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if (!dev->status)
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dev->status = e;
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}
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break;
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case USB_ENDPOINT_XFER_BULK:
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if (usb_endpoint_dir_in(&e->desc)) {
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if (!in)
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in = e;
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} else {
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if (!out)
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out = e;
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}
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break;
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default:
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break;
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}
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}
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if (in && !dev->in)
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dev->in = usb_rcvbulkpipe(dev->udev,
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in->desc.bEndpointAddress &
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USB_ENDPOINT_NUMBER_MASK);
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if (out && !dev->out)
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dev->out = usb_sndbulkpipe(dev->udev,
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out->desc.bEndpointAddress &
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USB_ENDPOINT_NUMBER_MASK);
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}
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static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
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{
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if (ctx == NULL)
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return;
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|
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if (ctx->tx_rem_skb != NULL) {
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dev_kfree_skb_any(ctx->tx_rem_skb);
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ctx->tx_rem_skb = NULL;
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}
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|
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if (ctx->tx_curr_skb != NULL) {
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dev_kfree_skb_any(ctx->tx_curr_skb);
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ctx->tx_curr_skb = NULL;
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}
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kfree(ctx);
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}
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static const struct ethtool_ops cdc_ncm_ethtool_ops = {
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.get_drvinfo = cdc_ncm_get_drvinfo,
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.get_link = usbnet_get_link,
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.get_msglevel = usbnet_get_msglevel,
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.set_msglevel = usbnet_set_msglevel,
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.get_settings = usbnet_get_settings,
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.set_settings = usbnet_set_settings,
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.nway_reset = usbnet_nway_reset,
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};
|
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|
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int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
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{
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const struct usb_cdc_union_desc *union_desc = NULL;
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struct cdc_ncm_ctx *ctx;
|
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struct usb_driver *driver;
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u8 *buf;
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int len;
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int temp;
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u8 iface_no;
|
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|
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
|
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|
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hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
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ctx->bh.data = (unsigned long)dev;
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ctx->bh.func = cdc_ncm_txpath_bh;
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atomic_set(&ctx->stop, 0);
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spin_lock_init(&ctx->mtx);
|
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|
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/* store ctx pointer in device data field */
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dev->data[0] = (unsigned long)ctx;
|
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|
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/* get some pointers */
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driver = driver_of(intf);
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buf = intf->cur_altsetting->extra;
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len = intf->cur_altsetting->extralen;
|
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|
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/* parse through descriptors associated with control interface */
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while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
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|
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if (buf[1] != USB_DT_CS_INTERFACE)
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goto advance;
|
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|
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switch (buf[2]) {
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case USB_CDC_UNION_TYPE:
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if (buf[0] < sizeof(*union_desc))
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break;
|
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|
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union_desc = (const struct usb_cdc_union_desc *)buf;
|
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|
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ctx->control = usb_ifnum_to_if(dev->udev,
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union_desc->bMasterInterface0);
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ctx->data = usb_ifnum_to_if(dev->udev,
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union_desc->bSlaveInterface0);
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break;
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case USB_CDC_ETHERNET_TYPE:
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if (buf[0] < sizeof(*(ctx->ether_desc)))
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break;
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ctx->ether_desc =
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(const struct usb_cdc_ether_desc *)buf;
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dev->hard_mtu =
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le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
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|
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if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
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dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
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else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
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dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
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break;
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|
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case USB_CDC_NCM_TYPE:
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if (buf[0] < sizeof(*(ctx->func_desc)))
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break;
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|
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ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
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break;
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|
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case USB_CDC_MBIM_TYPE:
|
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if (buf[0] < sizeof(*(ctx->mbim_desc)))
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break;
|
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|
|
ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
advance:
|
|
/* advance to next descriptor */
|
|
temp = buf[0];
|
|
buf += temp;
|
|
len -= temp;
|
|
}
|
|
|
|
/* some buggy devices have an IAD but no CDC Union */
|
|
if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
|
|
ctx->control = intf;
|
|
ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
|
|
dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
|
|
}
|
|
|
|
/* check if we got everything */
|
|
if ((ctx->control == NULL) || (ctx->data == NULL) ||
|
|
((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf))))
|
|
goto error;
|
|
|
|
/* claim data interface, if different from control */
|
|
if (ctx->data != ctx->control) {
|
|
temp = usb_driver_claim_interface(driver, ctx->data, dev);
|
|
if (temp)
|
|
goto error;
|
|
}
|
|
|
|
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
|
|
|
|
/* reset data interface */
|
|
temp = usb_set_interface(dev->udev, iface_no, 0);
|
|
if (temp)
|
|
goto error2;
|
|
|
|
/* configure data interface */
|
|
temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
|
|
if (temp)
|
|
goto error2;
|
|
|
|
cdc_ncm_find_endpoints(dev, ctx->data);
|
|
cdc_ncm_find_endpoints(dev, ctx->control);
|
|
if (!dev->in || !dev->out || !dev->status)
|
|
goto error2;
|
|
|
|
/* initialize data interface */
|
|
if (cdc_ncm_setup(dev))
|
|
goto error2;
|
|
|
|
dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
|
|
|
|
usb_set_intfdata(ctx->data, dev);
|
|
usb_set_intfdata(ctx->control, dev);
|
|
|
|
if (ctx->ether_desc) {
|
|
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
|
|
if (temp)
|
|
goto error2;
|
|
dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
|
|
}
|
|
|
|
dev->rx_urb_size = ctx->rx_max;
|
|
|
|
return 0;
|
|
|
|
error2:
|
|
usb_set_intfdata(ctx->control, NULL);
|
|
usb_set_intfdata(ctx->data, NULL);
|
|
if (ctx->data != ctx->control)
|
|
usb_driver_release_interface(driver, ctx->data);
|
|
error:
|
|
cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
|
|
dev->data[0] = 0;
|
|
dev_info(&dev->udev->dev, "bind() failure\n");
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
|
|
|
|
void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
struct usb_driver *driver = driver_of(intf);
|
|
|
|
if (ctx == NULL)
|
|
return; /* no setup */
|
|
|
|
atomic_set(&ctx->stop, 1);
|
|
|
|
if (hrtimer_active(&ctx->tx_timer))
|
|
hrtimer_cancel(&ctx->tx_timer);
|
|
|
|
tasklet_kill(&ctx->bh);
|
|
|
|
/* handle devices with combined control and data interface */
|
|
if (ctx->control == ctx->data)
|
|
ctx->data = NULL;
|
|
|
|
/* disconnect master --> disconnect slave */
|
|
if (intf == ctx->control && ctx->data) {
|
|
usb_set_intfdata(ctx->data, NULL);
|
|
usb_driver_release_interface(driver, ctx->data);
|
|
ctx->data = NULL;
|
|
|
|
} else if (intf == ctx->data && ctx->control) {
|
|
usb_set_intfdata(ctx->control, NULL);
|
|
usb_driver_release_interface(driver, ctx->control);
|
|
ctx->control = NULL;
|
|
}
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
cdc_ncm_free(ctx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
|
|
|
|
/* Select the MBIM altsetting iff it is preferred and available,
|
|
* returning the number of the corresponding data interface altsetting
|
|
*/
|
|
u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
struct usb_host_interface *alt;
|
|
|
|
/* The MBIM spec defines a NCM compatible default altsetting,
|
|
* which we may have matched:
|
|
*
|
|
* "Functions that implement both NCM 1.0 and MBIM (an
|
|
* “NCM/MBIM function”) according to this recommendation
|
|
* shall provide two alternate settings for the
|
|
* Communication Interface. Alternate setting 0, and the
|
|
* associated class and endpoint descriptors, shall be
|
|
* constructed according to the rules given for the
|
|
* Communication Interface in section 5 of [USBNCM10].
|
|
* Alternate setting 1, and the associated class and
|
|
* endpoint descriptors, shall be constructed according to
|
|
* the rules given in section 6 (USB Device Model) of this
|
|
* specification."
|
|
*/
|
|
if (prefer_mbim && intf->num_altsetting == 2) {
|
|
alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
|
|
if (alt && cdc_ncm_comm_intf_is_mbim(alt) &&
|
|
!usb_set_interface(dev->udev,
|
|
intf->cur_altsetting->desc.bInterfaceNumber,
|
|
CDC_NCM_COMM_ALTSETTING_MBIM))
|
|
return CDC_NCM_DATA_ALTSETTING_MBIM;
|
|
}
|
|
return CDC_NCM_DATA_ALTSETTING_NCM;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
|
|
|
|
static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
int ret;
|
|
|
|
/* MBIM backwards compatible function? */
|
|
cdc_ncm_select_altsetting(dev, intf);
|
|
if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
|
|
return -ENODEV;
|
|
|
|
/* NCM data altsetting is always 1 */
|
|
ret = cdc_ncm_bind_common(dev, intf, 1);
|
|
|
|
/*
|
|
* We should get an event when network connection is "connected" or
|
|
* "disconnected". Set network connection in "disconnected" state
|
|
* (carrier is OFF) during attach, so the IP network stack does not
|
|
* start IPv6 negotiation and more.
|
|
*/
|
|
usbnet_link_change(dev, 0, 0);
|
|
return ret;
|
|
}
|
|
|
|
static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
|
|
{
|
|
size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
|
|
|
|
if (skb->len + align > max)
|
|
align = max - skb->len;
|
|
if (align && skb_tailroom(skb) >= align)
|
|
memset(skb_put(skb, align), 0, align);
|
|
}
|
|
|
|
/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
|
|
* allocating a new one within skb
|
|
*/
|
|
static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
|
|
{
|
|
struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
|
|
struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
|
|
size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
|
|
|
|
/* follow the chain of NDPs, looking for a match */
|
|
while (ndpoffset) {
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
|
|
if (ndp16->dwSignature == sign)
|
|
return ndp16;
|
|
ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
|
|
}
|
|
|
|
/* align new NDP */
|
|
cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
|
|
|
|
/* verify that there is room for the NDP and the datagram (reserve) */
|
|
if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE)
|
|
return NULL;
|
|
|
|
/* link to it */
|
|
if (ndp16)
|
|
ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
|
|
else
|
|
nth16->wNdpIndex = cpu_to_le16(skb->len);
|
|
|
|
/* push a new empty NDP */
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE);
|
|
ndp16->dwSignature = sign;
|
|
ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
|
|
return ndp16;
|
|
}
|
|
|
|
struct sk_buff *
|
|
cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
struct usb_cdc_ncm_nth16 *nth16;
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
struct sk_buff *skb_out;
|
|
u16 n = 0, index, ndplen;
|
|
u8 ready2send = 0;
|
|
|
|
/* if there is a remaining skb, it gets priority */
|
|
if (skb != NULL) {
|
|
swap(skb, ctx->tx_rem_skb);
|
|
swap(sign, ctx->tx_rem_sign);
|
|
} else {
|
|
ready2send = 1;
|
|
}
|
|
|
|
/* check if we are resuming an OUT skb */
|
|
skb_out = ctx->tx_curr_skb;
|
|
|
|
/* allocate a new OUT skb */
|
|
if (!skb_out) {
|
|
skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
|
|
if (skb_out == NULL) {
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
goto exit_no_skb;
|
|
}
|
|
/* fill out the initial 16-bit NTB header */
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
|
|
nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
|
|
nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
|
|
nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
|
|
|
|
/* count total number of frames in this NTB */
|
|
ctx->tx_curr_frame_num = 0;
|
|
}
|
|
|
|
for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
|
|
/* send any remaining skb first */
|
|
if (skb == NULL) {
|
|
skb = ctx->tx_rem_skb;
|
|
sign = ctx->tx_rem_sign;
|
|
ctx->tx_rem_skb = NULL;
|
|
|
|
/* check for end of skb */
|
|
if (skb == NULL)
|
|
break;
|
|
}
|
|
|
|
/* get the appropriate NDP for this skb */
|
|
ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
|
|
|
|
/* align beginning of next frame */
|
|
cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
|
|
|
|
/* check if we had enough room left for both NDP and frame */
|
|
if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
|
|
if (n == 0) {
|
|
/* won't fit, MTU problem? */
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
dev->net->stats.tx_dropped++;
|
|
} else {
|
|
/* no room for skb - store for later */
|
|
if (ctx->tx_rem_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_rem_skb);
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
ctx->tx_rem_skb = skb;
|
|
ctx->tx_rem_sign = sign;
|
|
skb = NULL;
|
|
ready2send = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* calculate frame number withing this NDP */
|
|
ndplen = le16_to_cpu(ndp16->wLength);
|
|
index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
|
|
|
|
/* OK, add this skb */
|
|
ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
|
|
ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
|
|
ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
|
|
memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
|
|
/* send now if this NDP is full */
|
|
if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
|
|
ready2send = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* free up any dangling skb */
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
|
|
ctx->tx_curr_frame_num = n;
|
|
|
|
if (n == 0) {
|
|
/* wait for more frames */
|
|
/* push variables */
|
|
ctx->tx_curr_skb = skb_out;
|
|
goto exit_no_skb;
|
|
|
|
} else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) {
|
|
/* wait for more frames */
|
|
/* push variables */
|
|
ctx->tx_curr_skb = skb_out;
|
|
/* set the pending count */
|
|
if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
|
|
ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
|
|
goto exit_no_skb;
|
|
|
|
} else {
|
|
/* frame goes out */
|
|
/* variables will be reset at next call */
|
|
}
|
|
|
|
/* If collected data size is less or equal CDC_NCM_MIN_TX_PKT
|
|
* bytes, we send buffers as it is. If we get more data, it
|
|
* would be more efficient for USB HS mobile device with DMA
|
|
* engine to receive a full size NTB, than canceling DMA
|
|
* transfer and receiving a short packet.
|
|
*/
|
|
if (skb_out->len > CDC_NCM_MIN_TX_PKT)
|
|
memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
|
|
ctx->tx_max - skb_out->len);
|
|
else if ((skb_out->len % dev->maxpacket) == 0)
|
|
*skb_put(skb_out, 1) = 0; /* force short packet */
|
|
|
|
/* set final frame length */
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
|
|
nth16->wBlockLength = cpu_to_le16(skb_out->len);
|
|
|
|
/* return skb */
|
|
ctx->tx_curr_skb = NULL;
|
|
dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
|
|
return skb_out;
|
|
|
|
exit_no_skb:
|
|
/* Start timer, if there is a remaining skb */
|
|
if (ctx->tx_curr_skb != NULL)
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
|
|
|
|
static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
|
|
{
|
|
/* start timer, if not already started */
|
|
if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
|
|
hrtimer_start(&ctx->tx_timer,
|
|
ktime_set(0, CDC_NCM_TIMER_INTERVAL),
|
|
HRTIMER_MODE_REL);
|
|
}
|
|
|
|
static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
|
|
{
|
|
struct cdc_ncm_ctx *ctx =
|
|
container_of(timer, struct cdc_ncm_ctx, tx_timer);
|
|
|
|
if (!atomic_read(&ctx->stop))
|
|
tasklet_schedule(&ctx->bh);
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
static void cdc_ncm_txpath_bh(unsigned long param)
|
|
{
|
|
struct usbnet *dev = (struct usbnet *)param;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
spin_lock_bh(&ctx->mtx);
|
|
if (ctx->tx_timer_pending != 0) {
|
|
ctx->tx_timer_pending--;
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
spin_unlock_bh(&ctx->mtx);
|
|
} else if (dev->net != NULL) {
|
|
spin_unlock_bh(&ctx->mtx);
|
|
netif_tx_lock_bh(dev->net);
|
|
usbnet_start_xmit(NULL, dev->net);
|
|
netif_tx_unlock_bh(dev->net);
|
|
} else {
|
|
spin_unlock_bh(&ctx->mtx);
|
|
}
|
|
}
|
|
|
|
static struct sk_buff *
|
|
cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
|
|
{
|
|
struct sk_buff *skb_out;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
/*
|
|
* The Ethernet API we are using does not support transmitting
|
|
* multiple Ethernet frames in a single call. This driver will
|
|
* accumulate multiple Ethernet frames and send out a larger
|
|
* USB frame when the USB buffer is full or when a single jiffies
|
|
* timeout happens.
|
|
*/
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
spin_lock_bh(&ctx->mtx);
|
|
skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
|
|
spin_unlock_bh(&ctx->mtx);
|
|
return skb_out;
|
|
|
|
error:
|
|
if (skb != NULL)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* verify NTB header and return offset of first NDP, or negative error */
|
|
int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
|
|
{
|
|
struct usb_cdc_ncm_nth16 *nth16;
|
|
int len;
|
|
int ret = -EINVAL;
|
|
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
|
|
sizeof(struct usb_cdc_ncm_ndp16))) {
|
|
pr_debug("frame too short\n");
|
|
goto error;
|
|
}
|
|
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
|
|
|
|
if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) {
|
|
pr_debug("invalid NTH16 signature <%u>\n",
|
|
le32_to_cpu(nth16->dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
len = le16_to_cpu(nth16->wBlockLength);
|
|
if (len > ctx->rx_max) {
|
|
pr_debug("unsupported NTB block length %u/%u\n", len,
|
|
ctx->rx_max);
|
|
goto error;
|
|
}
|
|
|
|
if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
|
|
(ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
|
|
!((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
|
|
pr_debug("sequence number glitch prev=%d curr=%d\n",
|
|
ctx->rx_seq, le16_to_cpu(nth16->wSequence));
|
|
}
|
|
ctx->rx_seq = le16_to_cpu(nth16->wSequence);
|
|
|
|
ret = le16_to_cpu(nth16->wNdpIndex);
|
|
error:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
|
|
|
|
/* verify NDP header and return number of datagrams, or negative error */
|
|
int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
|
|
{
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
int ret = -EINVAL;
|
|
|
|
if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
|
|
pr_debug("invalid NDP offset <%u>\n", ndpoffset);
|
|
goto error;
|
|
}
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
|
|
|
|
if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
|
|
pr_debug("invalid DPT16 length <%u>\n",
|
|
le32_to_cpu(ndp16->dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
ret = ((le16_to_cpu(ndp16->wLength) -
|
|
sizeof(struct usb_cdc_ncm_ndp16)) /
|
|
sizeof(struct usb_cdc_ncm_dpe16));
|
|
ret--; /* we process NDP entries except for the last one */
|
|
|
|
if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) >
|
|
skb_in->len) {
|
|
pr_debug("Invalid nframes = %d\n", ret);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
error:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
|
|
|
|
static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
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 */
|
|
|
|
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);
|
|
|
|
if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) {
|
|
pr_debug("invalid DPT16 signature <%u>\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 */
|
|
if (((offset + len) > skb_in->len) ||
|
|
(len > ctx->rx_max) || (len < ETH_HLEN)) {
|
|
pr_debug("invalid frame detected (ignored)"
|
|
"offset[%u]=%u, length=%u, skb=%p\n",
|
|
x, offset, len, skb_in);
|
|
if (!x)
|
|
goto err_ndp;
|
|
break;
|
|
|
|
} else {
|
|
skb = skb_clone(skb_in, GFP_ATOMIC);
|
|
if (!skb)
|
|
goto error;
|
|
skb->len = len;
|
|
skb->data = ((u8 *)skb_in->data) + offset;
|
|
skb_set_tail_pointer(skb, len);
|
|
usbnet_skb_return(dev, skb);
|
|
}
|
|
}
|
|
err_ndp:
|
|
/* are there more NDPs to process? */
|
|
ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
|
|
if (ndpoffset && loopcount--)
|
|
goto next_ndp;
|
|
|
|
return 1;
|
|
error:
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cdc_ncm_speed_change(struct usbnet *dev,
|
|
struct usb_cdc_speed_change *data)
|
|
{
|
|
uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
|
|
uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
|
|
|
|
/*
|
|
* Currently the USB-NET API does not support reporting the actual
|
|
* device speed. Do print it instead.
|
|
*/
|
|
if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
|
|
printk(KERN_INFO KBUILD_MODNAME
|
|
": %s: %u mbit/s downlink "
|
|
"%u mbit/s uplink\n",
|
|
dev->net->name,
|
|
(unsigned int)(rx_speed / 1000000U),
|
|
(unsigned int)(tx_speed / 1000000U));
|
|
} else {
|
|
printk(KERN_INFO KBUILD_MODNAME
|
|
": %s: %u kbit/s downlink "
|
|
"%u kbit/s uplink\n",
|
|
dev->net->name,
|
|
(unsigned int)(rx_speed / 1000U),
|
|
(unsigned int)(tx_speed / 1000U));
|
|
}
|
|
}
|
|
|
|
static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
struct cdc_ncm_ctx *ctx;
|
|
struct usb_cdc_notification *event;
|
|
|
|
ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
if (urb->actual_length < sizeof(*event))
|
|
return;
|
|
|
|
/* test for split data in 8-byte chunks */
|
|
if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
|
|
cdc_ncm_speed_change(dev,
|
|
(struct usb_cdc_speed_change *)urb->transfer_buffer);
|
|
return;
|
|
}
|
|
|
|
event = urb->transfer_buffer;
|
|
|
|
switch (event->bNotificationType) {
|
|
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
|
|
/*
|
|
* According to the CDC NCM specification ch.7.1
|
|
* USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
|
|
* sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
|
|
*/
|
|
ctx->connected = le16_to_cpu(event->wValue);
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
|
|
" %sconnected\n",
|
|
dev->net->name, ctx->connected ? "" : "dis");
|
|
|
|
usbnet_link_change(dev, ctx->connected, 0);
|
|
break;
|
|
|
|
case USB_CDC_NOTIFY_SPEED_CHANGE:
|
|
if (urb->actual_length < (sizeof(*event) +
|
|
sizeof(struct usb_cdc_speed_change)))
|
|
set_bit(EVENT_STS_SPLIT, &dev->flags);
|
|
else
|
|
cdc_ncm_speed_change(dev,
|
|
(struct usb_cdc_speed_change *)&event[1]);
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(&dev->udev->dev,
|
|
"NCM: unexpected notification 0x%02x!\n",
|
|
event->bNotificationType);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int cdc_ncm_check_connect(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx;
|
|
|
|
ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
if (ctx == NULL)
|
|
return 1; /* disconnected */
|
|
|
|
return !ctx->connected;
|
|
}
|
|
|
|
static int
|
|
cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod)
|
|
{
|
|
return usbnet_probe(udev, prod);
|
|
}
|
|
|
|
static void cdc_ncm_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct usbnet *dev = usb_get_intfdata(intf);
|
|
|
|
if (dev == NULL)
|
|
return; /* already disconnected */
|
|
|
|
usbnet_disconnect(intf);
|
|
}
|
|
|
|
static const struct driver_info cdc_ncm_info = {
|
|
.description = "CDC NCM",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.check_connect = cdc_ncm_check_connect,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
/* Same as cdc_ncm_info, but with FLAG_WWAN */
|
|
static const struct driver_info wwan_info = {
|
|
.description = "Mobile Broadband Network Device",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_WWAN,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.check_connect = cdc_ncm_check_connect,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
/* Same as wwan_info, but with FLAG_NOARP */
|
|
static const struct driver_info wwan_noarp_info = {
|
|
.description = "Mobile Broadband Network Device (NO ARP)",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_WWAN | FLAG_NOARP,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.check_connect = cdc_ncm_check_connect,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
static const struct usb_device_id cdc_devs[] = {
|
|
/* Ericsson MBM devices like F5521gw */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x0bdb,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* Dell branded MBM devices like DW5550 */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x413c,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* Toshiba branded MBM devices */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x0930,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* tag Huawei devices as wwan */
|
|
{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM,
|
|
USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
|
|
/* Huawei NCM devices disguised as vendor specific */
|
|
{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
|
|
/* Infineon(now Intel) HSPA Modem platform */
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_noarp_info,
|
|
},
|
|
|
|
/* Generic CDC-NCM devices */
|
|
{ USB_INTERFACE_INFO(USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&cdc_ncm_info,
|
|
},
|
|
{
|
|
},
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, cdc_devs);
|
|
|
|
static struct usb_driver cdc_ncm_driver = {
|
|
.name = "cdc_ncm",
|
|
.id_table = cdc_devs,
|
|
.probe = cdc_ncm_probe,
|
|
.disconnect = cdc_ncm_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
.reset_resume = usbnet_resume,
|
|
.supports_autosuspend = 1,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(cdc_ncm_driver);
|
|
|
|
MODULE_AUTHOR("Hans Petter Selasky");
|
|
MODULE_DESCRIPTION("USB CDC NCM host driver");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|