84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
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/*
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* u_ether.h -- interface to USB gadget "ethernet link" utilities
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*
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* Copyright (C) 2003-2005,2008 David Brownell
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* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
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* Copyright (C) 2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __U_ETHER_H
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#define __U_ETHER_H
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#include <linux/err.h>
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#include <linux/if_ether.h>
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#include <linux/usb/composite.h>
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#include <linux/usb/cdc.h>
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/*
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* This represents the USB side of an "ethernet" link, managed by a USB
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* function which provides control and (maybe) framing. Two functions
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* in different configurations could share the same ethernet link/netdev.
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*
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* There is currently a limitation that one instance of this function
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* may be present in any given configuration.
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*/
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struct gether {
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struct usb_function func;
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/* updated by gether_{connect,disconnect} */
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struct eth_dev *ioport;
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/* endpoints handle full and/or high speeds */
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struct usb_ep *in_ep;
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struct usb_ep *out_ep;
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/* descriptors match device speed at gether_connect() time */
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struct usb_endpoint_descriptor *in;
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struct usb_endpoint_descriptor *out;
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bool is_zlp_ok;
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u16 cdc_filter;
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/* hooks for added framing, as needed for RNDIS and EEM.
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* we currently don't support multiple frames per SKB.
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*/
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u32 header_len;
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struct sk_buff *(*wrap)(struct sk_buff *skb);
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int (*unwrap)(struct sk_buff *skb);
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/* called on network open/close */
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void (*open)(struct gether *);
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void (*close)(struct gether *);
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};
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#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
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|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
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|USB_CDC_PACKET_TYPE_PROMISCUOUS \
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|USB_CDC_PACKET_TYPE_DIRECTED)
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/* netdev setup/teardown as directed by the gadget driver */
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int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]);
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void gether_cleanup(void);
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/* connect/disconnect is handled by individual functions */
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struct net_device *gether_connect(struct gether *);
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void gether_disconnect(struct gether *);
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#endif /* __U_ETHER_H */
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