da741b8c56
This is a "CDC Ethernet" (ECM) function driver, extracted from the all-in-one Ethernet gadget driver. This is a good example of how to implement interface altsettings. In fact it's currently the only such example in the gadget stack, pending addition of OBEX support. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/*
|
|
* u_ether.h -- interface to USB gadget "ethernet link" utilities
|
|
*
|
|
* Copyright (C) 2003-2005,2008 David Brownell
|
|
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
|
|
* Copyright (C) 2008 Nokia Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __U_ETHER_H
|
|
#define __U_ETHER_H
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/usb/composite.h>
|
|
#include <linux/usb/cdc.h>
|
|
|
|
#include "gadget_chips.h"
|
|
|
|
|
|
/*
|
|
* This represents the USB side of an "ethernet" link, managed by a USB
|
|
* function which provides control and (maybe) framing. Two functions
|
|
* in different configurations could share the same ethernet link/netdev.
|
|
*
|
|
* There is currently a limitation that one instance of this function
|
|
* may be present in any given configuration.
|
|
*/
|
|
struct gether {
|
|
struct usb_function func;
|
|
|
|
/* updated by gether_{connect,disconnect} */
|
|
struct eth_dev *ioport;
|
|
|
|
/* endpoints handle full and/or high speeds */
|
|
struct usb_ep *in_ep;
|
|
struct usb_ep *out_ep;
|
|
|
|
/* descriptors match device speed at gether_connect() time */
|
|
struct usb_endpoint_descriptor *in;
|
|
struct usb_endpoint_descriptor *out;
|
|
|
|
bool is_zlp_ok;
|
|
|
|
u16 cdc_filter;
|
|
|
|
/* hooks for added framing, as needed for RNDIS and EEM.
|
|
* we currently don't support multiple frames per SKB.
|
|
*/
|
|
u32 header_len;
|
|
struct sk_buff *(*wrap)(struct sk_buff *skb);
|
|
int (*unwrap)(struct sk_buff *skb);
|
|
|
|
/* called on network open/close */
|
|
void (*open)(struct gether *);
|
|
void (*close)(struct gether *);
|
|
};
|
|
|
|
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
|
|
|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
|
|
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|
|
|USB_CDC_PACKET_TYPE_DIRECTED)
|
|
|
|
|
|
/* netdev setup/teardown as directed by the gadget driver */
|
|
int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]);
|
|
void gether_cleanup(void);
|
|
|
|
/* connect/disconnect is handled by individual functions */
|
|
struct net_device *gether_connect(struct gether *);
|
|
void gether_disconnect(struct gether *);
|
|
|
|
/* Some controllers can't support CDC Ethernet (ECM) ... */
|
|
static inline bool can_support_ecm(struct usb_gadget *gadget)
|
|
{
|
|
if (!gadget_supports_altsettings(gadget))
|
|
return false;
|
|
|
|
/* SA1100 can do ECM, *without* status endpoint ... but we'll
|
|
* only use it in non-ECM mode for backwards compatibility
|
|
* (and since we currently require a status endpoint)
|
|
*/
|
|
if (gadget_is_sa1100(gadget))
|
|
return false;
|
|
|
|
/* Everything else is *presumably* fine ... but this is a bit
|
|
* chancy, so be **CERTAIN** there are no hardware issues with
|
|
* your controller. Add it above if it can't handle CDC.
|
|
*/
|
|
return true;
|
|
}
|
|
|
|
/* each configuration may bind one instance of an ethernet link */
|
|
int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
|
|
int ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
|
|
|
|
#endif /* __U_ETHER_H */
|