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![Alexey Orishko](/assets/img/avatar_default.png)
Changes: - claim slave/data interface during bind() and release interfaces in unbind() unconditionally - in case of error during bind(), release claimed data interface in the same function - remove obsolited "*_claimed" entries from driver context Signed-off-by: Alexey Orishko <alexey.orishko@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1267 lines
33 KiB
C
1267 lines
33 KiB
C
/*
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* cdc_ncm.c
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*
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* Copyright (C) ST-Ericsson 2010-2011
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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/version.h>
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#include <linux/timer.h>
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#include <linux/spinlock.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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#define DRIVER_VERSION "24-May-2011"
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/* CDC NCM subclass 3.2.1 */
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#define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10
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/* Maximum NTB length */
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#define CDC_NCM_NTB_MAX_SIZE_TX 16384 /* bytes */
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#define CDC_NCM_NTB_MAX_SIZE_RX 16384 /* bytes */
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/* Minimum value for MaxDatagramSize, ch. 6.2.9 */
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#define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */
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#define CDC_NCM_MIN_TX_PKT 512 /* bytes */
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/* Default value for MaxDatagramSize */
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#define CDC_NCM_MAX_DATAGRAM_SIZE 2048 /* bytes */
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/*
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* Maximum amount of datagrams in NCM Datagram Pointer Table, not counting
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* the last NULL entry. Any additional datagrams in NTB would be discarded.
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*/
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#define CDC_NCM_DPT_DATAGRAMS_MAX 32
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/* Maximum amount of IN datagrams in NTB */
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#define CDC_NCM_DPT_DATAGRAMS_IN_MAX 0 /* unlimited */
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/* Restart the timer, if amount of datagrams is less than given value */
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#define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3
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/* The following macro defines the minimum header space */
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#define CDC_NCM_MIN_HDR_SIZE \
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(sizeof(struct usb_cdc_ncm_nth16) + sizeof(struct usb_cdc_ncm_ndp16) + \
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(CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16))
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struct cdc_ncm_data {
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struct usb_cdc_ncm_nth16 nth16;
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struct usb_cdc_ncm_ndp16 ndp16;
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struct usb_cdc_ncm_dpe16 dpe16[CDC_NCM_DPT_DATAGRAMS_MAX + 1];
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};
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struct cdc_ncm_ctx {
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struct cdc_ncm_data rx_ncm;
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struct cdc_ncm_data tx_ncm;
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struct usb_cdc_ncm_ntb_parameters ncm_parm;
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struct timer_list tx_timer;
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const struct usb_cdc_ncm_desc *func_desc;
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const struct usb_cdc_header_desc *header_desc;
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const struct usb_cdc_union_desc *union_desc;
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const struct usb_cdc_ether_desc *ether_desc;
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struct net_device *netdev;
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struct usb_device *udev;
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struct usb_host_endpoint *in_ep;
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struct usb_host_endpoint *out_ep;
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struct usb_host_endpoint *status_ep;
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struct usb_interface *intf;
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struct usb_interface *control;
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struct usb_interface *data;
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struct sk_buff *tx_curr_skb;
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struct sk_buff *tx_rem_skb;
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spinlock_t mtx;
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u32 tx_timer_pending;
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u32 tx_curr_offset;
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u32 tx_curr_last_offset;
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u32 tx_curr_frame_num;
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u32 rx_speed;
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u32 tx_speed;
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u32 rx_max;
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u32 tx_max;
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u32 max_datagram_size;
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u16 tx_max_datagrams;
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u16 tx_remainder;
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u16 tx_modulus;
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u16 tx_ndp_modulus;
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u16 tx_seq;
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u16 connected;
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};
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static void cdc_ncm_tx_timeout(unsigned long arg);
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static const struct driver_info cdc_ncm_info;
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static struct usb_driver cdc_ncm_driver;
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static struct ethtool_ops cdc_ncm_ethtool_ops;
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static const struct usb_device_id cdc_devs[] = {
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{ USB_INTERFACE_INFO(USB_CLASS_COMM,
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USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
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.driver_info = (unsigned long)&cdc_ncm_info,
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},
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{
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},
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};
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MODULE_DEVICE_TABLE(usb, cdc_devs);
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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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strncpy(info->driver, dev->driver_name, sizeof(info->driver));
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strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
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strncpy(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 int
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cdc_ncm_do_request(struct cdc_ncm_ctx *ctx, struct usb_cdc_notification *req,
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void *data, u16 flags, u16 *actlen, u16 timeout)
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{
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int err;
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err = usb_control_msg(ctx->udev, (req->bmRequestType & USB_DIR_IN) ?
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usb_rcvctrlpipe(ctx->udev, 0) :
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usb_sndctrlpipe(ctx->udev, 0),
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req->bNotificationType, req->bmRequestType,
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req->wValue,
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req->wIndex, data,
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req->wLength, timeout);
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if (err < 0) {
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if (actlen)
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*actlen = 0;
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return err;
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}
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if (actlen)
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*actlen = err;
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return 0;
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}
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static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx)
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{
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struct usb_cdc_notification req;
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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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u16 ntb_fmt_supported;
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iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_GET_NTB_PARAMETERS;
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req.wValue = 0;
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req.wIndex = cpu_to_le16(iface_no);
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req.wLength = cpu_to_le16(sizeof(ctx->ncm_parm));
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err = cdc_ncm_do_request(ctx, &req, &ctx->ncm_parm, 0, NULL, 1000);
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if (err) {
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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(ctx->ncm_parm.dwNtbInMaxSize);
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ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
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ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
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ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
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ctx->tx_ndp_modulus = le16_to_cpu(ctx->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(ctx->ncm_parm.wNtbOutMaxDatagrams);
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ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported);
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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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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(ctx->ncm_parm.dwNtbInMaxSize)) {
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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_OUT |
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USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_SET_NTB_INPUT_SIZE;
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req.wValue = 0;
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req.wIndex = cpu_to_le16(iface_no);
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if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) {
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struct usb_cdc_ncm_ndp_input_size ndp_in_sz;
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req.wLength = 8;
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ndp_in_sz.dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
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ndp_in_sz.wNtbInMaxDatagrams =
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cpu_to_le16(CDC_NCM_DPT_DATAGRAMS_MAX);
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ndp_in_sz.wReserved = 0;
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err = cdc_ncm_do_request(ctx, &req, &ndp_in_sz, 0, NULL,
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1000);
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} else {
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__le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
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req.wLength = 4;
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err = cdc_ncm_do_request(ctx, &req, &dwNtbInMaxSize, 0,
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NULL, 1000);
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}
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if (err)
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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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(CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_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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}
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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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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_OUT |
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USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_SET_CRC_MODE;
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req.wValue = cpu_to_le16(USB_CDC_NCM_CRC_NOT_APPENDED);
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req.wIndex = cpu_to_le16(iface_no);
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req.wLength = 0;
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err = cdc_ncm_do_request(ctx, &req, NULL, 0, NULL, 1000);
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if (err)
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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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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_OUT |
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USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_SET_NTB_FORMAT;
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req.wValue = cpu_to_le16(USB_CDC_NCM_NTB16_FORMAT);
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req.wIndex = cpu_to_le16(iface_no);
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req.wLength = 0;
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err = cdc_ncm_do_request(ctx, &req, NULL, 0, NULL, 1000);
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if (err)
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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 = CDC_NCM_MIN_DATAGRAM_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 = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_IN |
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USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_GET_MAX_DATAGRAM_SIZE;
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req.wValue = 0;
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req.wIndex = cpu_to_le16(iface_no);
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req.wLength = cpu_to_le16(2);
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err = cdc_ncm_do_request(ctx, &req, &max_datagram_size, 0, NULL,
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1000);
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if (err) {
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pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n",
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CDC_NCM_MIN_DATAGRAM_SIZE);
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} else {
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ctx->max_datagram_size = le16_to_cpu(max_datagram_size);
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/* Check Eth descriptor value */
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if (eth_max_sz < CDC_NCM_MAX_DATAGRAM_SIZE) {
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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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} else {
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if (ctx->max_datagram_size >
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CDC_NCM_MAX_DATAGRAM_SIZE)
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ctx->max_datagram_size =
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CDC_NCM_MAX_DATAGRAM_SIZE;
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}
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if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE)
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ctx->max_datagram_size =
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CDC_NCM_MIN_DATAGRAM_SIZE;
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/* if value changed, update device */
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req.bmRequestType = USB_TYPE_CLASS | USB_DIR_OUT |
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USB_RECIP_INTERFACE;
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req.bNotificationType = USB_CDC_SET_MAX_DATAGRAM_SIZE;
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req.wValue = 0;
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req.wIndex = cpu_to_le16(iface_no);
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req.wLength = 2;
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max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
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err = cdc_ncm_do_request(ctx, &req, &max_datagram_size,
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0, NULL, 1000);
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if (err)
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pr_debug("SET_MAX_DATAGRAM_SIZE failed\n");
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}
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}
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if (ctx->netdev->mtu != (ctx->max_datagram_size - ETH_HLEN))
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ctx->netdev->mtu = ctx->max_datagram_size - ETH_HLEN;
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return 0;
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}
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|
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static void
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cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf)
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{
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struct usb_host_endpoint *e;
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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 (ctx->status_ep == NULL)
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ctx->status_ep = e;
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}
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break;
|
|
|
|
case USB_ENDPOINT_XFER_BULK:
|
|
if (usb_endpoint_dir_in(&e->desc)) {
|
|
if (ctx->in_ep == NULL)
|
|
ctx->in_ep = e;
|
|
} else {
|
|
if (ctx->out_ep == NULL)
|
|
ctx->out_ep = e;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
|
|
{
|
|
if (ctx == NULL)
|
|
return;
|
|
|
|
del_timer_sync(&ctx->tx_timer);
|
|
|
|
if (ctx->tx_rem_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_rem_skb);
|
|
ctx->tx_rem_skb = NULL;
|
|
}
|
|
|
|
if (ctx->tx_curr_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_curr_skb);
|
|
ctx->tx_curr_skb = NULL;
|
|
}
|
|
|
|
kfree(ctx);
|
|
}
|
|
|
|
static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
struct cdc_ncm_ctx *ctx;
|
|
struct usb_driver *driver;
|
|
u8 *buf;
|
|
int len;
|
|
int temp;
|
|
u8 iface_no;
|
|
|
|
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (ctx == NULL)
|
|
return -ENODEV;
|
|
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
|
|
init_timer(&ctx->tx_timer);
|
|
spin_lock_init(&ctx->mtx);
|
|
ctx->netdev = dev->net;
|
|
|
|
/* store ctx pointer in device data field */
|
|
dev->data[0] = (unsigned long)ctx;
|
|
|
|
/* get some pointers */
|
|
driver = driver_of(intf);
|
|
buf = intf->cur_altsetting->extra;
|
|
len = intf->cur_altsetting->extralen;
|
|
|
|
ctx->udev = dev->udev;
|
|
ctx->intf = intf;
|
|
|
|
/* parse through descriptors associated with control interface */
|
|
while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
|
|
|
|
if (buf[1] != USB_DT_CS_INTERFACE)
|
|
goto advance;
|
|
|
|
switch (buf[2]) {
|
|
case USB_CDC_UNION_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->union_desc)))
|
|
break;
|
|
|
|
ctx->union_desc =
|
|
(const struct usb_cdc_union_desc *)buf;
|
|
|
|
ctx->control = usb_ifnum_to_if(dev->udev,
|
|
ctx->union_desc->bMasterInterface0);
|
|
ctx->data = usb_ifnum_to_if(dev->udev,
|
|
ctx->union_desc->bSlaveInterface0);
|
|
break;
|
|
|
|
case USB_CDC_ETHERNET_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->ether_desc)))
|
|
break;
|
|
|
|
ctx->ether_desc =
|
|
(const struct usb_cdc_ether_desc *)buf;
|
|
dev->hard_mtu =
|
|
le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
|
|
|
|
if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
|
|
dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
|
|
else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
|
|
dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
|
|
break;
|
|
|
|
case USB_CDC_NCM_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->func_desc)))
|
|
break;
|
|
|
|
ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
advance:
|
|
/* advance to next descriptor */
|
|
temp = buf[0];
|
|
buf += temp;
|
|
len -= temp;
|
|
}
|
|
|
|
/* check if we got everything */
|
|
if ((ctx->control == NULL) || (ctx->data == NULL) ||
|
|
(ctx->ether_desc == NULL) || (ctx->control != intf))
|
|
goto error;
|
|
|
|
/* claim interfaces, if any */
|
|
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;
|
|
|
|
/* initialize data interface */
|
|
if (cdc_ncm_setup(ctx))
|
|
goto error2;
|
|
|
|
/* configure data interface */
|
|
temp = usb_set_interface(dev->udev, iface_no, 1);
|
|
if (temp)
|
|
goto error2;
|
|
|
|
cdc_ncm_find_endpoints(ctx, ctx->data);
|
|
cdc_ncm_find_endpoints(ctx, ctx->control);
|
|
|
|
if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
|
|
(ctx->status_ep == NULL))
|
|
goto error2;
|
|
|
|
dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
|
|
|
|
usb_set_intfdata(ctx->data, dev);
|
|
usb_set_intfdata(ctx->control, dev);
|
|
usb_set_intfdata(ctx->intf, dev);
|
|
|
|
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
|
|
if (temp)
|
|
goto error2;
|
|
|
|
dev_info(&dev->udev->dev, "MAC-Address: "
|
|
"0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
|
|
dev->net->dev_addr[0], dev->net->dev_addr[1],
|
|
dev->net->dev_addr[2], dev->net->dev_addr[3],
|
|
dev->net->dev_addr[4], dev->net->dev_addr[5]);
|
|
|
|
dev->in = usb_rcvbulkpipe(dev->udev,
|
|
ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
|
|
dev->out = usb_sndbulkpipe(dev->udev,
|
|
ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
|
|
dev->status = ctx->status_ep;
|
|
dev->rx_urb_size = ctx->rx_max;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
netif_carrier_off(dev->net);
|
|
ctx->tx_speed = ctx->rx_speed = 0;
|
|
return 0;
|
|
|
|
error2:
|
|
usb_set_intfdata(ctx->control, NULL);
|
|
usb_set_intfdata(ctx->data, NULL);
|
|
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;
|
|
}
|
|
|
|
static 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 */
|
|
|
|
/* 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(ctx->intf, NULL);
|
|
cdc_ncm_free(ctx);
|
|
}
|
|
|
|
static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max)
|
|
{
|
|
if (first >= max)
|
|
return;
|
|
if (first >= end)
|
|
return;
|
|
if (end > max)
|
|
end = max;
|
|
memset(ptr + first, 0, end - first);
|
|
}
|
|
|
|
static struct sk_buff *
|
|
cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *skb_out;
|
|
u32 rem;
|
|
u32 offset;
|
|
u32 last_offset;
|
|
u16 n = 0;
|
|
u8 ready2send = 0;
|
|
|
|
/* if there is a remaining skb, it gets priority */
|
|
if (skb != NULL)
|
|
swap(skb, ctx->tx_rem_skb);
|
|
else
|
|
ready2send = 1;
|
|
|
|
/*
|
|
* +----------------+
|
|
* | skb_out |
|
|
* +----------------+
|
|
* ^ offset
|
|
* ^ last_offset
|
|
*/
|
|
|
|
/* check if we are resuming an OUT skb */
|
|
if (ctx->tx_curr_skb != NULL) {
|
|
/* pop variables */
|
|
skb_out = ctx->tx_curr_skb;
|
|
offset = ctx->tx_curr_offset;
|
|
last_offset = ctx->tx_curr_last_offset;
|
|
n = ctx->tx_curr_frame_num;
|
|
|
|
} else {
|
|
/* reset variables */
|
|
skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC);
|
|
if (skb_out == NULL) {
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
ctx->netdev->stats.tx_dropped++;
|
|
}
|
|
goto exit_no_skb;
|
|
}
|
|
|
|
/* make room for NTH and NDP */
|
|
offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16),
|
|
ctx->tx_ndp_modulus) +
|
|
sizeof(struct usb_cdc_ncm_ndp16) +
|
|
(ctx->tx_max_datagrams + 1) *
|
|
sizeof(struct usb_cdc_ncm_dpe16);
|
|
|
|
/* store last valid offset before alignment */
|
|
last_offset = offset;
|
|
/* align first Datagram offset correctly */
|
|
offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
|
|
/* zero buffer till the first IP datagram */
|
|
cdc_ncm_zero_fill(skb_out->data, 0, offset, offset);
|
|
n = 0;
|
|
ctx->tx_curr_frame_num = 0;
|
|
}
|
|
|
|
for (; n < ctx->tx_max_datagrams; n++) {
|
|
/* check if end of transmit buffer is reached */
|
|
if (offset >= ctx->tx_max) {
|
|
ready2send = 1;
|
|
break;
|
|
}
|
|
/* compute maximum buffer size */
|
|
rem = ctx->tx_max - offset;
|
|
|
|
if (skb == NULL) {
|
|
skb = ctx->tx_rem_skb;
|
|
ctx->tx_rem_skb = NULL;
|
|
|
|
/* check for end of skb */
|
|
if (skb == NULL)
|
|
break;
|
|
}
|
|
|
|
if (skb->len > rem) {
|
|
if (n == 0) {
|
|
/* won't fit, MTU problem? */
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
ctx->netdev->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);
|
|
ctx->netdev->stats.tx_dropped++;
|
|
}
|
|
ctx->tx_rem_skb = skb;
|
|
skb = NULL;
|
|
ready2send = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len);
|
|
|
|
ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len);
|
|
ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset);
|
|
|
|
/* update offset */
|
|
offset += skb->len;
|
|
|
|
/* store last valid offset before alignment */
|
|
last_offset = offset;
|
|
|
|
/* align offset correctly */
|
|
offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder;
|
|
|
|
/* zero padding */
|
|
cdc_ncm_zero_fill(skb_out->data, last_offset, offset,
|
|
ctx->tx_max);
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
}
|
|
|
|
/* free up any dangling skb */
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
ctx->netdev->stats.tx_dropped++;
|
|
}
|
|
|
|
ctx->tx_curr_frame_num = n;
|
|
|
|
if (n == 0) {
|
|
/* wait for more frames */
|
|
/* push variables */
|
|
ctx->tx_curr_skb = skb_out;
|
|
ctx->tx_curr_offset = offset;
|
|
ctx->tx_curr_last_offset = last_offset;
|
|
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;
|
|
ctx->tx_curr_offset = offset;
|
|
ctx->tx_curr_last_offset = last_offset;
|
|
/* set the pending count */
|
|
if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
|
|
ctx->tx_timer_pending = 2;
|
|
goto exit_no_skb;
|
|
|
|
} else {
|
|
/* frame goes out */
|
|
/* variables will be reset at next call */
|
|
}
|
|
|
|
/* check for overflow */
|
|
if (last_offset > ctx->tx_max)
|
|
last_offset = ctx->tx_max;
|
|
|
|
/* revert offset */
|
|
offset = last_offset;
|
|
|
|
/*
|
|
* 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 (offset > CDC_NCM_MIN_TX_PKT)
|
|
offset = ctx->tx_max;
|
|
|
|
/* final zero padding */
|
|
cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max);
|
|
|
|
/* store last offset */
|
|
last_offset = offset;
|
|
|
|
if (((last_offset < ctx->tx_max) && ((last_offset %
|
|
le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) ||
|
|
(((last_offset == ctx->tx_max) && ((ctx->tx_max %
|
|
le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) &&
|
|
(ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) {
|
|
/* force short packet */
|
|
*(((u8 *)skb_out->data) + last_offset) = 0;
|
|
last_offset++;
|
|
}
|
|
|
|
/* zero the rest of the DPEs plus the last NULL entry */
|
|
for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) {
|
|
ctx->tx_ncm.dpe16[n].wDatagramLength = 0;
|
|
ctx->tx_ncm.dpe16[n].wDatagramIndex = 0;
|
|
}
|
|
|
|
/* fill out 16-bit NTB header */
|
|
ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
|
|
ctx->tx_ncm.nth16.wHeaderLength =
|
|
cpu_to_le16(sizeof(ctx->tx_ncm.nth16));
|
|
ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq);
|
|
ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset);
|
|
ctx->tx_ncm.nth16.wNdpIndex = ALIGN(sizeof(struct usb_cdc_ncm_nth16),
|
|
ctx->tx_ndp_modulus);
|
|
|
|
memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16));
|
|
ctx->tx_seq++;
|
|
|
|
/* fill out 16-bit NDP table */
|
|
ctx->tx_ncm.ndp16.dwSignature =
|
|
cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN);
|
|
rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) *
|
|
sizeof(struct usb_cdc_ncm_dpe16));
|
|
ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem);
|
|
ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */
|
|
|
|
memcpy(((u8 *)skb_out->data) + ctx->tx_ncm.nth16.wNdpIndex,
|
|
&(ctx->tx_ncm.ndp16),
|
|
sizeof(ctx->tx_ncm.ndp16));
|
|
|
|
memcpy(((u8 *)skb_out->data) + ctx->tx_ncm.nth16.wNdpIndex +
|
|
sizeof(ctx->tx_ncm.ndp16),
|
|
&(ctx->tx_ncm.dpe16),
|
|
(ctx->tx_curr_frame_num + 1) *
|
|
sizeof(struct usb_cdc_ncm_dpe16));
|
|
|
|
/* set frame length */
|
|
skb_put(skb_out, last_offset);
|
|
|
|
/* return skb */
|
|
ctx->tx_curr_skb = NULL;
|
|
return skb_out;
|
|
|
|
exit_no_skb:
|
|
return NULL;
|
|
}
|
|
|
|
static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
|
|
{
|
|
/* start timer, if not already started */
|
|
if (timer_pending(&ctx->tx_timer) == 0) {
|
|
ctx->tx_timer.function = &cdc_ncm_tx_timeout;
|
|
ctx->tx_timer.data = (unsigned long)ctx;
|
|
ctx->tx_timer.expires = jiffies + ((HZ + 999) / 1000);
|
|
add_timer(&ctx->tx_timer);
|
|
}
|
|
}
|
|
|
|
static void cdc_ncm_tx_timeout(unsigned long arg)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)arg;
|
|
u8 restart;
|
|
|
|
spin_lock(&ctx->mtx);
|
|
if (ctx->tx_timer_pending != 0) {
|
|
ctx->tx_timer_pending--;
|
|
restart = 1;
|
|
} else {
|
|
restart = 0;
|
|
}
|
|
|
|
spin_unlock(&ctx->mtx);
|
|
|
|
if (restart) {
|
|
spin_lock(&ctx->mtx);
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
spin_unlock(&ctx->mtx);
|
|
} else if (ctx->netdev != NULL) {
|
|
usbnet_start_xmit(NULL, ctx->netdev);
|
|
}
|
|
}
|
|
|
|
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];
|
|
u8 need_timer = 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(&ctx->mtx);
|
|
skb_out = cdc_ncm_fill_tx_frame(ctx, skb);
|
|
if (ctx->tx_curr_skb != NULL)
|
|
need_timer = 1;
|
|
|
|
/* Start timer, if there is a remaining skb */
|
|
if (need_timer)
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
|
|
if (skb_out)
|
|
dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
|
|
|
|
spin_unlock(&ctx->mtx);
|
|
return skb_out;
|
|
|
|
error:
|
|
if (skb != NULL)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cdc_ncm_ctx *ctx;
|
|
int sumlen;
|
|
int actlen;
|
|
int temp;
|
|
int nframes;
|
|
int x;
|
|
int offset;
|
|
|
|
ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
actlen = skb_in->len;
|
|
sumlen = CDC_NCM_NTB_MAX_SIZE_RX;
|
|
|
|
if (actlen < (sizeof(ctx->rx_ncm.nth16) + sizeof(ctx->rx_ncm.ndp16))) {
|
|
pr_debug("frame too short\n");
|
|
goto error;
|
|
}
|
|
|
|
memcpy(&(ctx->rx_ncm.nth16), ((u8 *)skb_in->data),
|
|
sizeof(ctx->rx_ncm.nth16));
|
|
|
|
if (le32_to_cpu(ctx->rx_ncm.nth16.dwSignature) !=
|
|
USB_CDC_NCM_NTH16_SIGN) {
|
|
pr_debug("invalid NTH16 signature <%u>\n",
|
|
le32_to_cpu(ctx->rx_ncm.nth16.dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
temp = le16_to_cpu(ctx->rx_ncm.nth16.wBlockLength);
|
|
if (temp > sumlen) {
|
|
pr_debug("unsupported NTB block length %u/%u\n", temp, sumlen);
|
|
goto error;
|
|
}
|
|
|
|
temp = le16_to_cpu(ctx->rx_ncm.nth16.wNdpIndex);
|
|
if ((temp + sizeof(ctx->rx_ncm.ndp16)) > actlen) {
|
|
pr_debug("invalid DPT16 index\n");
|
|
goto error;
|
|
}
|
|
|
|
memcpy(&(ctx->rx_ncm.ndp16), ((u8 *)skb_in->data) + temp,
|
|
sizeof(ctx->rx_ncm.ndp16));
|
|
|
|
if (le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature) !=
|
|
USB_CDC_NCM_NDP16_NOCRC_SIGN) {
|
|
pr_debug("invalid DPT16 signature <%u>\n",
|
|
le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
if (le16_to_cpu(ctx->rx_ncm.ndp16.wLength) <
|
|
USB_CDC_NCM_NDP16_LENGTH_MIN) {
|
|
pr_debug("invalid DPT16 length <%u>\n",
|
|
le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
nframes = ((le16_to_cpu(ctx->rx_ncm.ndp16.wLength) -
|
|
sizeof(struct usb_cdc_ncm_ndp16)) /
|
|
sizeof(struct usb_cdc_ncm_dpe16));
|
|
nframes--; /* we process NDP entries except for the last one */
|
|
|
|
pr_debug("nframes = %u\n", nframes);
|
|
|
|
temp += sizeof(ctx->rx_ncm.ndp16);
|
|
|
|
if ((temp + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > actlen) {
|
|
pr_debug("Invalid nframes = %d\n", nframes);
|
|
goto error;
|
|
}
|
|
|
|
if (nframes > CDC_NCM_DPT_DATAGRAMS_MAX) {
|
|
pr_debug("Truncating number of frames from %u to %u\n",
|
|
nframes, CDC_NCM_DPT_DATAGRAMS_MAX);
|
|
nframes = CDC_NCM_DPT_DATAGRAMS_MAX;
|
|
}
|
|
|
|
memcpy(&(ctx->rx_ncm.dpe16), ((u8 *)skb_in->data) + temp,
|
|
nframes * (sizeof(struct usb_cdc_ncm_dpe16)));
|
|
|
|
for (x = 0; x < nframes; x++) {
|
|
offset = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramIndex);
|
|
temp = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramLength);
|
|
|
|
/*
|
|
* CDC NCM ch. 3.7
|
|
* All entries after first NULL entry are to be ignored
|
|
*/
|
|
if ((offset == 0) || (temp == 0)) {
|
|
if (!x)
|
|
goto error; /* empty NTB */
|
|
break;
|
|
}
|
|
|
|
/* sanity checking */
|
|
if (((offset + temp) > actlen) ||
|
|
(temp > CDC_NCM_MAX_DATAGRAM_SIZE) || (temp < ETH_HLEN)) {
|
|
pr_debug("invalid frame detected (ignored)"
|
|
"offset[%u]=%u, length=%u, skb=%p\n",
|
|
x, offset, temp, skb_in);
|
|
if (!x)
|
|
goto error;
|
|
break;
|
|
|
|
} else {
|
|
skb = skb_clone(skb_in, GFP_ATOMIC);
|
|
if (!skb)
|
|
goto error;
|
|
skb->len = temp;
|
|
skb->data = ((u8 *)skb_in->data) + offset;
|
|
skb_set_tail_pointer(skb, temp);
|
|
usbnet_skb_return(dev, skb);
|
|
}
|
|
}
|
|
return 1;
|
|
error:
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx,
|
|
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 != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) {
|
|
ctx->tx_speed = tx_speed;
|
|
ctx->rx_speed = rx_speed;
|
|
|
|
if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
|
|
printk(KERN_INFO KBUILD_MODNAME
|
|
": %s: %u mbit/s downlink "
|
|
"%u mbit/s uplink\n",
|
|
ctx->netdev->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",
|
|
ctx->netdev->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(ctx,
|
|
(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 = event->wValue;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:"
|
|
" %sconnected\n",
|
|
ctx->netdev->name, ctx->connected ? "" : "dis");
|
|
|
|
if (ctx->connected)
|
|
netif_carrier_on(dev->net);
|
|
else {
|
|
netif_carrier_off(dev->net);
|
|
ctx->tx_speed = ctx->rx_speed = 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(ctx,
|
|
(struct usb_cdc_speed_change *) &event[1]);
|
|
break;
|
|
|
|
default:
|
|
dev_err(&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 int cdc_ncm_manage_power(struct usbnet *dev, int status)
|
|
{
|
|
dev->intf->needs_remote_wakeup = status;
|
|
return 0;
|
|
}
|
|
|
|
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 = cdc_ncm_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
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,
|
|
.supports_autosuspend = 1,
|
|
};
|
|
|
|
static struct ethtool_ops cdc_ncm_ethtool_ops = {
|
|
.get_drvinfo = cdc_ncm_get_drvinfo,
|
|
.get_link = usbnet_get_link,
|
|
.get_msglevel = usbnet_get_msglevel,
|
|
.set_msglevel = usbnet_set_msglevel,
|
|
.get_settings = usbnet_get_settings,
|
|
.set_settings = usbnet_set_settings,
|
|
.nway_reset = usbnet_nway_reset,
|
|
};
|
|
|
|
static int __init cdc_ncm_init(void)
|
|
{
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION "\n");
|
|
return usb_register(&cdc_ncm_driver);
|
|
}
|
|
|
|
module_init(cdc_ncm_init);
|
|
|
|
static void __exit cdc_ncm_exit(void)
|
|
{
|
|
usb_deregister(&cdc_ncm_driver);
|
|
}
|
|
|
|
module_exit(cdc_ncm_exit);
|
|
|
|
MODULE_AUTHOR("Hans Petter Selasky");
|
|
MODULE_DESCRIPTION("USB CDC NCM host driver");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|