220 lines
7.3 KiB
C
220 lines
7.3 KiB
C
/*
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* USB Networking Link Interface
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*
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* Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
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* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
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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 __LINUX_USB_USBNET_H
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#define __LINUX_USB_USBNET_H
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/* interface from usbnet core to each USB networking link we handle */
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struct usbnet {
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/* housekeeping */
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struct usb_device *udev;
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struct usb_interface *intf;
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struct driver_info *driver_info;
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const char *driver_name;
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void *driver_priv;
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wait_queue_head_t *wait;
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struct mutex phy_mutex;
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unsigned char suspend_count;
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/* i/o info: pipes etc */
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unsigned in, out;
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struct usb_host_endpoint *status;
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unsigned maxpacket;
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struct timer_list delay;
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/* protocol/interface state */
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struct net_device *net;
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struct net_device_stats stats;
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int msg_enable;
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unsigned long data [5];
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u32 xid;
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u32 hard_mtu; /* count any extra framing */
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size_t rx_urb_size; /* size for rx urbs */
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struct mii_if_info mii;
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/* various kinds of pending driver work */
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struct sk_buff_head rxq;
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struct sk_buff_head txq;
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struct sk_buff_head done;
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struct urb *interrupt;
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struct tasklet_struct bh;
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struct work_struct kevent;
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unsigned long flags;
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# define EVENT_TX_HALT 0
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# define EVENT_RX_HALT 1
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# define EVENT_RX_MEMORY 2
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# define EVENT_STS_SPLIT 3
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# define EVENT_LINK_RESET 4
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};
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static inline struct usb_driver *driver_of(struct usb_interface *intf)
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{
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return to_usb_driver(intf->dev.driver);
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}
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/* interface from the device/framing level "minidriver" to core */
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struct driver_info {
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char *description;
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int flags;
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/* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
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#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
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#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
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#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
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#define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
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#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
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#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
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#define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
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#define FLAG_WLAN 0x0080 /* use "wlan%d" names */
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/* init device ... can sleep, or cause probe() failure */
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int (*bind)(struct usbnet *, struct usb_interface *);
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/* cleanup device ... can sleep, but can't fail */
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void (*unbind)(struct usbnet *, struct usb_interface *);
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/* reset device ... can sleep */
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int (*reset)(struct usbnet *);
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/* see if peer is connected ... can sleep */
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int (*check_connect)(struct usbnet *);
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/* for status polling */
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void (*status)(struct usbnet *, struct urb *);
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/* link reset handling, called from defer_kevent */
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int (*link_reset)(struct usbnet *);
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/* fixup rx packet (strip framing) */
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int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
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/* fixup tx packet (add framing) */
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struct sk_buff *(*tx_fixup)(struct usbnet *dev,
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struct sk_buff *skb, gfp_t flags);
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/* early initialization code, can sleep. This is for minidrivers
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* having 'subminidrivers' that need to do extra initialization
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* right after minidriver have initialized hardware. */
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int (*early_init)(struct usbnet *dev);
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/* called by minidriver when link state changes, state: 0=disconnect,
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* 1=connect */
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void (*link_change)(struct usbnet *dev, int state);
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/* for new devices, use the descriptor-reading code instead */
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int in; /* rx endpoint */
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int out; /* tx endpoint */
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unsigned long data; /* Misc driver specific data */
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};
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/* Minidrivers are just drivers using the "usbnet" core as a powerful
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* network-specific subroutine library ... that happens to do pretty
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* much everything except custom framing and chip-specific stuff.
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*/
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extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
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extern int usbnet_suspend (struct usb_interface *, pm_message_t );
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extern int usbnet_resume (struct usb_interface *);
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extern void usbnet_disconnect(struct usb_interface *);
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/* Drivers that reuse some of the standard USB CDC infrastructure
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* (notably, using multiple interfaces according to the CDC
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* union descriptor) get some helper code.
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*/
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struct cdc_state {
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struct usb_cdc_header_desc *header;
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struct usb_cdc_union_desc *u;
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struct usb_cdc_ether_desc *ether;
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struct usb_interface *control;
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struct usb_interface *data;
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};
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extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
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extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
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/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
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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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/* we record the state for each of our queued skbs */
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enum skb_state {
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illegal = 0,
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tx_start, tx_done,
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rx_start, rx_done, rx_cleanup
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};
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struct skb_data { /* skb->cb is one of these */
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struct urb *urb;
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struct usbnet *dev;
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enum skb_state state;
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size_t length;
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};
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extern int usbnet_open (struct net_device *net);
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extern int usbnet_stop (struct net_device *net);
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extern int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net);
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extern void usbnet_tx_timeout (struct net_device *net);
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extern int usbnet_change_mtu (struct net_device *net, int new_mtu);
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extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
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extern void usbnet_defer_kevent (struct usbnet *, int);
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extern void usbnet_skb_return (struct usbnet *, struct sk_buff *);
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extern void usbnet_unlink_rx_urbs(struct usbnet *);
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extern int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd);
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extern int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd);
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extern u32 usbnet_get_link (struct net_device *net);
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extern u32 usbnet_get_msglevel (struct net_device *);
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extern void usbnet_set_msglevel (struct net_device *, u32);
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extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
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extern int usbnet_nway_reset(struct net_device *net);
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/* messaging support includes the interface name, so it must not be
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* used before it has one ... notably, in minidriver bind() calls.
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*/
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#ifdef DEBUG
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#define devdbg(usbnet, fmt, arg...) \
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printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
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#else
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#define devdbg(usbnet, fmt, arg...) \
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({ if (0) printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , \
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## arg); 0; })
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#endif
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#define deverr(usbnet, fmt, arg...) \
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printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
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#define devwarn(usbnet, fmt, arg...) \
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printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
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#define devinfo(usbnet, fmt, arg...) \
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printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
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#endif /* __LINUX_USB_USBNET_H */
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