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Linux/include/linux/usb/usbnet.h

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  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 */
 26 struct 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         unsigned char           pkt_cnt, pkt_err;
 37 
 38         /* i/o info: pipes etc */
 39         unsigned                in, out;
 40         struct usb_host_endpoint *status;
 41         unsigned                maxpacket;
 42         struct timer_list       delay;
 43 
 44         /* protocol/interface state */
 45         struct net_device       *net;
 46         int                     msg_enable;
 47         unsigned long           data[5];
 48         u32                     xid;
 49         u32                     hard_mtu;       /* count any extra framing */
 50         size_t                  rx_urb_size;    /* size for rx urbs */
 51         struct mii_if_info      mii;
 52 
 53         /* various kinds of pending driver work */
 54         struct sk_buff_head     rxq;
 55         struct sk_buff_head     txq;
 56         struct sk_buff_head     done;
 57         struct sk_buff_head     rxq_pause;
 58         struct urb              *interrupt;
 59         struct usb_anchor       deferred;
 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 #               define EVENT_RX_PAUSED  5
 70 #               define EVENT_DEV_ASLEEP 6
 71 #               define EVENT_DEV_OPEN   7
 72 #               define EVENT_DEVICE_REPORT_IDLE 8
 73 #               define EVENT_NO_RUNTIME_PM      9
 74 #               define EVENT_RX_KILL    10
 75 };
 76 
 77 static inline struct usb_driver *driver_of(struct usb_interface *intf)
 78 {
 79         return to_usb_driver(intf->dev.driver);
 80 }
 81 
 82 /* interface from the device/framing level "minidriver" to core */
 83 struct driver_info {
 84         char            *description;
 85 
 86         int             flags;
 87 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
 88 #define FLAG_FRAMING_NC 0x0001          /* guard against device dropouts */
 89 #define FLAG_FRAMING_GL 0x0002          /* genelink batches packets */
 90 #define FLAG_FRAMING_Z  0x0004          /* zaurus adds a trailer */
 91 #define FLAG_FRAMING_RN 0x0008          /* RNDIS batches, plus huge header */
 92 
 93 #define FLAG_NO_SETINT  0x0010          /* device can't set_interface() */
 94 #define FLAG_ETHER      0x0020          /* maybe use "eth%d" names */
 95 
 96 #define FLAG_FRAMING_AX 0x0040          /* AX88772/178 packets */
 97 #define FLAG_WLAN       0x0080          /* use "wlan%d" names */
 98 #define FLAG_AVOID_UNLINK_URBS 0x0100   /* don't unlink urbs at usbnet_stop() */
 99 #define FLAG_SEND_ZLP   0x0200          /* hw requires ZLPs are sent */
100 #define FLAG_WWAN       0x0400          /* use "wwan%d" names */
101 
102 #define FLAG_LINK_INTR  0x0800          /* updates link (carrier) status */
103 
104 #define FLAG_POINTTOPOINT 0x1000        /* possibly use "usb%d" names */
105 
106 /*
107  * Indicates to usbnet, that USB driver accumulates multiple IP packets.
108  * Affects statistic (counters) and short packet handling.
109  */
110 #define FLAG_MULTI_PACKET       0x2000
111 #define FLAG_RX_ASSEMBLE        0x4000  /* rx packets may span >1 frames */
112 #define FLAG_NOARP              0x8000  /* device can't do ARP */
113 
114         /* init device ... can sleep, or cause probe() failure */
115         int     (*bind)(struct usbnet *, struct usb_interface *);
116 
117         /* cleanup device ... can sleep, but can't fail */
118         void    (*unbind)(struct usbnet *, struct usb_interface *);
119 
120         /* reset device ... can sleep */
121         int     (*reset)(struct usbnet *);
122 
123         /* stop device ... can sleep */
124         int     (*stop)(struct usbnet *);
125 
126         /* see if peer is connected ... can sleep */
127         int     (*check_connect)(struct usbnet *);
128 
129         /* (dis)activate runtime power management */
130         int     (*manage_power)(struct usbnet *, int);
131 
132         /* for status polling */
133         void    (*status)(struct usbnet *, struct urb *);
134 
135         /* link reset handling, called from defer_kevent */
136         int     (*link_reset)(struct usbnet *);
137 
138         /* fixup rx packet (strip framing) */
139         int     (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
140 
141         /* fixup tx packet (add framing) */
142         struct sk_buff  *(*tx_fixup)(struct usbnet *dev,
143                                 struct sk_buff *skb, gfp_t flags);
144 
145         /* early initialization code, can sleep. This is for minidrivers
146          * having 'subminidrivers' that need to do extra initialization
147          * right after minidriver have initialized hardware. */
148         int     (*early_init)(struct usbnet *dev);
149 
150         /* called by minidriver when receiving indication */
151         void    (*indication)(struct usbnet *dev, void *ind, int indlen);
152 
153         /* for new devices, use the descriptor-reading code instead */
154         int             in;             /* rx endpoint */
155         int             out;            /* tx endpoint */
156 
157         unsigned long   data;           /* Misc driver specific data */
158 };
159 
160 /* Minidrivers are just drivers using the "usbnet" core as a powerful
161  * network-specific subroutine library ... that happens to do pretty
162  * much everything except custom framing and chip-specific stuff.
163  */
164 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
165 extern int usbnet_suspend(struct usb_interface *, pm_message_t);
166 extern int usbnet_resume(struct usb_interface *);
167 extern void usbnet_disconnect(struct usb_interface *);
168 extern void usbnet_device_suggests_idle(struct usbnet *dev);
169 
170 extern int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
171                     u16 value, u16 index, void *data, u16 size);
172 extern int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
173                     u16 value, u16 index, const void *data, u16 size);
174 extern int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
175                     u16 value, u16 index, void *data, u16 size);
176 extern int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
177                     u16 value, u16 index, const void *data, u16 size);
178 extern int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype,
179                     u16 value, u16 index, const void *data, u16 size);
180 
181 /* Drivers that reuse some of the standard USB CDC infrastructure
182  * (notably, using multiple interfaces according to the CDC
183  * union descriptor) get some helper code.
184  */
185 struct cdc_state {
186         struct usb_cdc_header_desc      *header;
187         struct usb_cdc_union_desc       *u;
188         struct usb_cdc_ether_desc       *ether;
189         struct usb_interface            *control;
190         struct usb_interface            *data;
191 };
192 
193 extern int usbnet_generic_cdc_bind(struct usbnet *, struct usb_interface *);
194 extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *);
195 extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *);
196 extern void usbnet_cdc_status(struct usbnet *, struct urb *);
197 
198 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
199 #define DEFAULT_FILTER  (USB_CDC_PACKET_TYPE_BROADCAST \
200                         |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
201                         |USB_CDC_PACKET_TYPE_PROMISCUOUS \
202                         |USB_CDC_PACKET_TYPE_DIRECTED)
203 
204 
205 /* we record the state for each of our queued skbs */
206 enum skb_state {
207         illegal = 0,
208         tx_start, tx_done,
209         rx_start, rx_done, rx_cleanup,
210         unlink_start
211 };
212 
213 struct skb_data {       /* skb->cb is one of these */
214         struct urb              *urb;
215         struct usbnet           *dev;
216         enum skb_state          state;
217         size_t                  length;
218 };
219 
220 extern int usbnet_open(struct net_device *net);
221 extern int usbnet_stop(struct net_device *net);
222 extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,
223                                      struct net_device *net);
224 extern void usbnet_tx_timeout(struct net_device *net);
225 extern int usbnet_change_mtu(struct net_device *net, int new_mtu);
226 
227 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
228 extern int usbnet_get_ethernet_addr(struct usbnet *, int);
229 extern void usbnet_defer_kevent(struct usbnet *, int);
230 extern void usbnet_skb_return(struct usbnet *, struct sk_buff *);
231 extern void usbnet_unlink_rx_urbs(struct usbnet *);
232 
233 extern void usbnet_pause_rx(struct usbnet *);
234 extern void usbnet_resume_rx(struct usbnet *);
235 extern void usbnet_purge_paused_rxq(struct usbnet *);
236 
237 extern int usbnet_get_settings(struct net_device *net,
238                                struct ethtool_cmd *cmd);
239 extern int usbnet_set_settings(struct net_device *net,
240                                struct ethtool_cmd *cmd);
241 extern u32 usbnet_get_link(struct net_device *net);
242 extern u32 usbnet_get_msglevel(struct net_device *);
243 extern void usbnet_set_msglevel(struct net_device *, u32);
244 extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
245 extern int usbnet_nway_reset(struct net_device *net);
246 
247 extern int usbnet_manage_power(struct usbnet *, int);
248 
249 #endif /* __LINUX_USB_USBNET_H */
250 

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