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
23 #ifndef __USBNET_H
24 #define __USBNET_H
25
26
27 /* interface from usbnet core to each USB networking link we handle */
28 struct usbnet {
29 /* housekeeping */
30 struct usb_device *udev;
31 struct usb_interface *intf;
32 struct driver_info *driver_info;
33 const char *driver_name;
34 void *driver_priv;
35 wait_queue_head_t *wait;
36 struct mutex phy_mutex;
37 unsigned char suspend_count;
38
39 /* i/o info: pipes etc */
40 unsigned in, out;
41 struct usb_host_endpoint *status;
42 unsigned maxpacket;
43 struct timer_list delay;
44
45 /* protocol/interface state */
46 struct net_device *net;
47 struct net_device_stats stats;
48 int msg_enable;
49 unsigned long data [5];
50 u32 xid;
51 u32 hard_mtu; /* count any extra framing */
52 size_t rx_urb_size; /* size for rx urbs */
53 struct mii_if_info mii;
54
55 /* various kinds of pending driver work */
56 struct sk_buff_head rxq;
57 struct sk_buff_head txq;
58 struct sk_buff_head done;
59 struct urb *interrupt;
60 struct tasklet_struct bh;
61
62 struct work_struct kevent;
63 unsigned long flags;
64 # define EVENT_TX_HALT 0
65 # define EVENT_RX_HALT 1
66 # define EVENT_RX_MEMORY 2
67 # define EVENT_STS_SPLIT 3
68 # define EVENT_LINK_RESET 4
69 };
70
71 static inline struct usb_driver *driver_of(struct usb_interface *intf)
72 {
73 return to_usb_driver(intf->dev.driver);
74 }
75
76 /* interface from the device/framing level "minidriver" to core */
77 struct driver_info {
78 char *description;
79
80 int flags;
81 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
82 #define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
83 #define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
84 #define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
85 #define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
86
87 #define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
88 #define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
89
90 #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
91 #define FLAG_WLAN 0x0080 /* use "wlan%d" names */
92
93
94 /* init device ... can sleep, or cause probe() failure */
95 int (*bind)(struct usbnet *, struct usb_interface *);
96
97 /* cleanup device ... can sleep, but can't fail */
98 void (*unbind)(struct usbnet *, struct usb_interface *);
99
100 /* reset device ... can sleep */
101 int (*reset)(struct usbnet *);
102
103 /* see if peer is connected ... can sleep */
104 int (*check_connect)(struct usbnet *);
105
106 /* for status polling */
107 void (*status)(struct usbnet *, struct urb *);
108
109 /* link reset handling, called from defer_kevent */
110 int (*link_reset)(struct usbnet *);
111
112 /* fixup rx packet (strip framing) */
113 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
114
115 /* fixup tx packet (add framing) */
116 struct sk_buff *(*tx_fixup)(struct usbnet *dev,
117 struct sk_buff *skb, gfp_t flags);
118
119 /* early initialization code, can sleep. This is for minidrivers
120 * having 'subminidrivers' that need to do extra initialization
121 * right after minidriver have initialized hardware. */
122 int (*early_init)(struct usbnet *dev);
123
124 /* called by minidriver when link state changes, state: 0=disconnect,
125 * 1=connect */
126 void (*link_change)(struct usbnet *dev, int state);
127
128 /* for new devices, use the descriptor-reading code instead */
129 int in; /* rx endpoint */
130 int out; /* tx endpoint */
131
132 unsigned long data; /* Misc driver specific data */
133 };
134
135 /* Minidrivers are just drivers using the "usbnet" core as a powerful
136 * network-specific subroutine library ... that happens to do pretty
137 * much everything except custom framing and chip-specific stuff.
138 */
139 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
140 extern int usbnet_suspend (struct usb_interface *, pm_message_t );
141 extern int usbnet_resume (struct usb_interface *);
142 extern void usbnet_disconnect(struct usb_interface *);
143
144
145 /* Drivers that reuse some of the standard USB CDC infrastructure
146 * (notably, using multiple interfaces according to the CDC
147 * union descriptor) get some helper code.
148 */
149 struct cdc_state {
150 struct usb_cdc_header_desc *header;
151 struct usb_cdc_union_desc *u;
152 struct usb_cdc_ether_desc *ether;
153 struct usb_interface *control;
154 struct usb_interface *data;
155 };
156
157 extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
158 extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
159
160 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
161 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
162 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
163 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
164 |USB_CDC_PACKET_TYPE_DIRECTED)
165
166
167 /* we record the state for each of our queued skbs */
168 enum skb_state {
169 illegal = 0,
170 tx_start, tx_done,
171 rx_start, rx_done, rx_cleanup
172 };
173
174 struct skb_data { /* skb->cb is one of these */
175 struct urb *urb;
176 struct usbnet *dev;
177 enum skb_state state;
178 size_t length;
179 };
180
181
182 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
183 extern void usbnet_defer_kevent (struct usbnet *, int);
184 extern void usbnet_skb_return (struct usbnet *, struct sk_buff *);
185 extern void usbnet_unlink_rx_urbs(struct usbnet *);
186
187 extern int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd);
188 extern int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd);
189 extern u32 usbnet_get_link (struct net_device *net);
190 extern u32 usbnet_get_msglevel (struct net_device *);
191 extern void usbnet_set_msglevel (struct net_device *, u32);
192 extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
193 extern int usbnet_nway_reset(struct net_device *net);
194
195 /* messaging support includes the interface name, so it must not be
196 * used before it has one ... notably, in minidriver bind() calls.
197 */
198 #ifdef DEBUG
199 #define devdbg(usbnet, fmt, arg...) \
200 printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
201 #else
202 #define devdbg(usbnet, fmt, arg...) do {} while(0)
203 #endif
204
205 #define deverr(usbnet, fmt, arg...) \
206 printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
207 #define devwarn(usbnet, fmt, arg...) \
208 printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
209
210 #define devinfo(usbnet, fmt, arg...) \
211 printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
212
213
214 #endif /* __USBNET_H */
215
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