drivers/net/usb/usbnet.h

   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         wait_queue_head_t       *wait;
  35         struct mutex            phy_mutex;
  36         unsigned char           suspend_count;
  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         struct net_device_stats stats;
  47         int                     msg_enable;
  48         unsigned long           data [5];
  49         u32                     xid;
  50         u32                     hard_mtu;       /* count any extra framing */
  51         size_t                  rx_urb_size;    /* size for rx urbs */
  52         struct mii_if_info      mii;
  53
  54         /* various kinds of pending driver work */
  55         struct sk_buff_head     rxq;
  56         struct sk_buff_head     txq;
  57         struct sk_buff_head     done;
  58         struct urb              *interrupt;
  59         struct tasklet_struct   bh;
  60
  61         struct work_struct      kevent;
  62         unsigned long           flags;
  63 #               define EVENT_TX_HALT    0
  64 #               define EVENT_RX_HALT    1
  65 #               define EVENT_RX_MEMORY  2
  66 #               define EVENT_STS_SPLIT  3
  67 #               define EVENT_LINK_RESET 4
  68 };
  69
  70 static inline struct usb_driver *driver_of(struct usb_interface *intf)
  71 {
  72         return to_usb_driver(intf->dev.driver);
  73 }
  74
  75 /* interface from the device/framing level "minidriver" to core */
  76 struct driver_info {
  77         char            *description;
  78
  79         int             flags;
  80 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
  81 #define FLAG_FRAMING_NC 0x0001          /* guard against device dropouts */
  82 #define FLAG_FRAMING_GL 0x0002          /* genelink batches packets */
  83 #define FLAG_FRAMING_Z  0x0004          /* zaurus adds a trailer */
  84 #define FLAG_FRAMING_RN 0x0008          /* RNDIS batches, plus huge header */
  85
  86 #define FLAG_NO_SETINT  0x0010          /* device can't set_interface() */
  87 #define FLAG_ETHER      0x0020          /* maybe use "eth%d" names */
  88
  89 #define FLAG_FRAMING_AX 0x0040          /* AX88772/178 packets */
  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         /* for new devices, use the descriptor-reading code instead */
 117         int             in;             /* rx endpoint */
 118         int             out;            /* tx endpoint */
 119
 120         unsigned long   data;           /* Misc driver specific data */
 121 };
 122
 123 /* Minidrivers are just drivers using the "usbnet" core as a powerful
 124  * network-specific subroutine library ... that happens to do pretty
 125  * much everything except custom framing and chip-specific stuff.
 126  */
 127 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
 128 extern int usbnet_suspend (struct usb_interface *, pm_message_t );
 129 extern int usbnet_resume (struct usb_interface *);
 130 extern void usbnet_disconnect(struct usb_interface *);
 131
 132
 133 /* Drivers that reuse some of the standard USB CDC infrastructure
 134  * (notably, using multiple interfaces according to the CDC
 135  * union descriptor) get some helper code.
 136  */
 137 struct cdc_state {
 138         struct usb_cdc_header_desc      *header;
 139         struct usb_cdc_union_desc       *u;
 140         struct usb_cdc_ether_desc       *ether;
 141         struct usb_interface            *control;
 142         struct usb_interface            *data;
 143 };
 144
 145 extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
 146 extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
 147
 148 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
 149 #define DEFAULT_FILTER  (USB_CDC_PACKET_TYPE_BROADCAST \
 150                         |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
 151                         |USB_CDC_PACKET_TYPE_PROMISCUOUS \
 152                         |USB_CDC_PACKET_TYPE_DIRECTED)
 153
 154
 155 /* we record the state for each of our queued skbs */
 156 enum skb_state {
 157         illegal = 0,
 158         tx_start, tx_done,
 159         rx_start, rx_done, rx_cleanup
 160 };
 161
 162 struct skb_data {       /* skb->cb is one of these */
 163         struct urb              *urb;
 164         struct usbnet           *dev;
 165         enum skb_state          state;
 166         size_t                  length;
 167 };
 168
 169
 170 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
 171 extern void usbnet_defer_kevent (struct usbnet *, int);
 172 extern void usbnet_skb_return (struct usbnet *, struct sk_buff *);
 173 extern void usbnet_unlink_rx_urbs(struct usbnet *);
 174
 175 extern int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd);
 176 extern int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd);
 177 extern u32 usbnet_get_link (struct net_device *net);
 178 extern u32 usbnet_get_msglevel (struct net_device *);
 179 extern void usbnet_set_msglevel (struct net_device *, u32);
 180 extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
 181 extern int usbnet_nway_reset(struct net_device *net);
 182
 183 /* messaging support includes the interface name, so it must not be
 184  * used before it has one ... notably, in minidriver bind() calls.
 185  */
 186 #ifdef DEBUG
 187 #define devdbg(usbnet, fmt, arg...) \
 188         printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
 189 #else
 190 #define devdbg(usbnet, fmt, arg...) do {} while(0)
 191 #endif
 192
 193 #define deverr(usbnet, fmt, arg...) \
 194         printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
 195 #define devwarn(usbnet, fmt, arg...) \
 196         printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
 197
 198 #define devinfo(usbnet, fmt, arg...) \
 199         printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
 200
 201
 202 #endif  /* __USBNET_H */