Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * USB Networking Link Interface
3 *
4 * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
5 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef __LINUX_USB_USBNET_H
23#define __LINUX_USB_USBNET_H
24
25/* interface from usbnet core to each USB networking link we handle */
26struct usbnet {
27 /* housekeeping */
28 struct usb_device *udev;
29 struct usb_interface *intf;
30 struct driver_info *driver_info;
31 const char *driver_name;
32 void *driver_priv;
33 wait_queue_head_t *wait;
34 struct mutex phy_mutex;
35 unsigned char suspend_count;
36
37 /* i/o info: pipes etc */
38 unsigned in, out;
39 struct usb_host_endpoint *status;
40 unsigned maxpacket;
41 struct timer_list delay;
42
43 /* protocol/interface state */
44 struct net_device *net;
45 int msg_enable;
46 unsigned long data [5];
47 u32 xid;
48 u32 hard_mtu; /* count any extra framing */
49 size_t rx_urb_size; /* size for rx urbs */
50 struct mii_if_info mii;
51
52 /* various kinds of pending driver work */
53 struct sk_buff_head rxq;
54 struct sk_buff_head txq;
55 struct sk_buff_head done;
56 struct urb *interrupt;
57 struct tasklet_struct bh;
58
59 struct work_struct kevent;
60 unsigned long flags;
61# define EVENT_TX_HALT 0
62# define EVENT_RX_HALT 1
63# define EVENT_RX_MEMORY 2
64# define EVENT_STS_SPLIT 3
65# define EVENT_LINK_RESET 4
66};
67
68static inline struct usb_driver *driver_of(struct usb_interface *intf)
69{
70 return to_usb_driver(intf->dev.driver);
71}
72
73/* interface from the device/framing level "minidriver" to core */
74struct driver_info {
75 char *description;
76
77 int flags;
78/* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
79#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
80#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
81#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
82#define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
83
84#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
85#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
86
87#define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
88#define FLAG_WLAN 0x0080 /* use "wlan%d" names */
89
90
91 /* init device ... can sleep, or cause probe() failure */
92 int (*bind)(struct usbnet *, struct usb_interface *);
93
94 /* cleanup device ... can sleep, but can't fail */
95 void (*unbind)(struct usbnet *, struct usb_interface *);
96
97 /* reset device ... can sleep */
98 int (*reset)(struct usbnet *);
99
100 /* see if peer is connected ... can sleep */
101 int (*check_connect)(struct usbnet *);
102
103 /* for status polling */
104 void (*status)(struct usbnet *, struct urb *);
105
106 /* link reset handling, called from defer_kevent */
107 int (*link_reset)(struct usbnet *);
108
109 /* fixup rx packet (strip framing) */
110 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
111
112 /* fixup tx packet (add framing) */
113 struct sk_buff *(*tx_fixup)(struct usbnet *dev,
114 struct sk_buff *skb, gfp_t flags);
115
116 /* early initialization code, can sleep. This is for minidrivers
117 * having 'subminidrivers' that need to do extra initialization
118 * right after minidriver have initialized hardware. */
119 int (*early_init)(struct usbnet *dev);
120
121 /* called by minidriver when link state changes, state: 0=disconnect,
122 * 1=connect */
123 void (*link_change)(struct usbnet *dev, int state);
124
125 /* for new devices, use the descriptor-reading code instead */
126 int in; /* rx endpoint */
127 int out; /* tx endpoint */
128
129 unsigned long data; /* Misc driver specific data */
130};
131
132/* Minidrivers are just drivers using the "usbnet" core as a powerful
133 * network-specific subroutine library ... that happens to do pretty
134 * much everything except custom framing and chip-specific stuff.
135 */
136extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
137extern int usbnet_suspend (struct usb_interface *, pm_message_t );
138extern int usbnet_resume (struct usb_interface *);
139extern void usbnet_disconnect(struct usb_interface *);
140
141
142/* Drivers that reuse some of the standard USB CDC infrastructure
143 * (notably, using multiple interfaces according to the CDC
144 * union descriptor) get some helper code.
145 */
146struct cdc_state {
147 struct usb_cdc_header_desc *header;
148 struct usb_cdc_union_desc *u;
149 struct usb_cdc_ether_desc *ether;
150 struct usb_interface *control;
151 struct usb_interface *data;
152};
153
154extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
155extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
156
157/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
158#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
159 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
160 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
161 |USB_CDC_PACKET_TYPE_DIRECTED)
162
163
164/* we record the state for each of our queued skbs */
165enum skb_state {
166 illegal = 0,
167 tx_start, tx_done,
168 rx_start, rx_done, rx_cleanup
169};
170
171struct skb_data { /* skb->cb is one of these */
172 struct urb *urb;
173 struct usbnet *dev;
174 enum skb_state state;
175 size_t length;
176};
177
178extern int usbnet_open (struct net_device *net);
179extern int usbnet_stop (struct net_device *net);
180extern int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net);
181extern void usbnet_tx_timeout (struct net_device *net);
182extern int usbnet_change_mtu (struct net_device *net, int new_mtu);
183
184extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
185extern int usbnet_get_ethernet_addr(struct usbnet *, int);
186extern void usbnet_defer_kevent (struct usbnet *, int);
187extern void usbnet_skb_return (struct usbnet *, struct sk_buff *);
188extern void usbnet_unlink_rx_urbs(struct usbnet *);
189
190extern int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd);
191extern int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd);
192extern u32 usbnet_get_link (struct net_device *net);
193extern u32 usbnet_get_msglevel (struct net_device *);
194extern void usbnet_set_msglevel (struct net_device *, u32);
195extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
196extern int usbnet_nway_reset(struct net_device *net);
197
198/* messaging support includes the interface name, so it must not be
199 * used before it has one ... notably, in minidriver bind() calls.
200 */
201#ifdef DEBUG
202#define devdbg(usbnet, fmt, arg...) \
203 printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
204#else
205#define devdbg(usbnet, fmt, arg...) \
206 ({ if (0) printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , \
207 ## arg); 0; })
208#endif
209
210#define deverr(usbnet, fmt, arg...) \
211 printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
212#define devwarn(usbnet, fmt, arg...) \
213 printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
214
215#define devinfo(usbnet, fmt, arg...) \
216 printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
217
218
219#endif /* __LINUX_USB_USBNET_H */