1 /* 2 * USB Networking Link Interface 3 * 4 * Copyright (C) 2000-2005 by David Brownell <[email protected]> 5 * Copyright (C) 2003-2005 David Hollis <[email protected]> 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 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 sk_buff_head rxq_pause; 57 struct urb *interrupt; 58 struct tasklet_struct bh; 59 60 struct work_struct kevent; 61 unsigned long flags; 62 # define EVENT_TX_HALT 0 63 # define EVENT_RX_HALT 1 64 # define EVENT_RX_MEMORY 2 65 # define EVENT_STS_SPLIT 3 66 # define EVENT_LINK_RESET 4 67 # define EVENT_RX_PAUSED 5 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 #define FLAG_WLAN 0x0080 /* use "wlan%d" names */ 91 #define FLAG_AVOID_UNLINK_URBS 0x0100 /* don't unlink urbs at usbnet_stop() */ 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 /* stop device ... can sleep */ 104 int (*stop)(struct usbnet *); 105 106 /* see if peer is connected ... can sleep */ 107 int (*check_connect)(struct usbnet *); 108 109 /* for status polling */ 110 void (*status)(struct usbnet *, struct urb *); 111 112 /* link reset handling, called from defer_kevent */ 113 int (*link_reset)(struct usbnet *); 114 115 /* fixup rx packet (strip framing) */ 116 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb); 117 118 /* fixup tx packet (add framing) */ 119 struct sk_buff *(*tx_fixup)(struct usbnet *dev, 120 struct sk_buff *skb, gfp_t flags); 121 122 /* early initialization code, can sleep. This is for minidrivers 123 * having 'subminidrivers' that need to do extra initialization 124 * right after minidriver have initialized hardware. */ 125 int (*early_init)(struct usbnet *dev); 126 127 /* called by minidriver when receiving indication */ 128 void (*indication)(struct usbnet *dev, void *ind, int indlen); 129 130 /* for new devices, use the descriptor-reading code instead */ 131 int in; /* rx endpoint */ 132 int out; /* tx endpoint */ 133 134 unsigned long data; /* Misc driver specific data */ 135 }; 136 137 /* Minidrivers are just drivers using the "usbnet" core as a powerful 138 * network-specific subroutine library ... that happens to do pretty 139 * much everything except custom framing and chip-specific stuff. 140 */ 141 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); 142 extern int usbnet_suspend (struct usb_interface *, pm_message_t ); 143 extern int usbnet_resume (struct usb_interface *); 144 extern void usbnet_disconnect(struct usb_interface *); 145 146 147 /* Drivers that reuse some of the standard USB CDC infrastructure 148 * (notably, using multiple interfaces according to the CDC 149 * union descriptor) get some helper code. 150 */ 151 struct cdc_state { 152 struct usb_cdc_header_desc *header; 153 struct usb_cdc_union_desc *u; 154 struct usb_cdc_ether_desc *ether; 155 struct usb_interface *control; 156 struct usb_interface *data; 157 }; 158 159 extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *); 160 extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *); 161 162 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */ 163 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 164 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 165 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 166 |USB_CDC_PACKET_TYPE_DIRECTED) 167 168 169 /* we record the state for each of our queued skbs */ 170 enum skb_state { 171 illegal = 0, 172 tx_start, tx_done, 173 rx_start, rx_done, rx_cleanup 174 }; 175 176 struct skb_data { /* skb->cb is one of these */ 177 struct urb *urb; 178 struct usbnet *dev; 179 enum skb_state state; 180 size_t length; 181 }; 182 183 extern int usbnet_open (struct net_device *net); 184 extern int usbnet_stop (struct net_device *net); 185 extern netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, 186 struct net_device *net); 187 extern void usbnet_tx_timeout (struct net_device *net); 188 extern int usbnet_change_mtu (struct net_device *net, int new_mtu); 189 190 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *); 191 extern int usbnet_get_ethernet_addr(struct usbnet *, int); 192 extern void usbnet_defer_kevent (struct usbnet *, int); 193 extern void usbnet_skb_return (struct usbnet *, struct sk_buff *); 194 extern void usbnet_unlink_rx_urbs(struct usbnet *); 195 196 extern void usbnet_pause_rx(struct usbnet *); 197 extern void usbnet_resume_rx(struct usbnet *); 198 extern void usbnet_purge_paused_rxq(struct usbnet *); 199 200 extern int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd); 201 extern int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd); 202 extern u32 usbnet_get_link (struct net_device *net); 203 extern u32 usbnet_get_msglevel (struct net_device *); 204 extern void usbnet_set_msglevel (struct net_device *, u32); 205 extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *); 206 extern int usbnet_nway_reset(struct net_device *net); 207 208 /* messaging support includes the interface name, so it must not be 209 * used before it has one ... notably, in minidriver bind() calls. 210 */ 211 #ifdef DEBUG 212 #define devdbg(usbnet, fmt, arg...) \ 213 printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg) 214 #else 215 #define devdbg(usbnet, fmt, arg...) \ 216 ({ if (0) printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , \ 217 ## arg); 0; }) 218 #endif 219 220 #define deverr(usbnet, fmt, arg...) \ 221 printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg) 222 #define devwarn(usbnet, fmt, arg...) \ 223 printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg) 224 225 #define devinfo(usbnet, fmt, arg...) \ 226 printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \ 227 228 229 #endif /* __LINUX_USB_USBNET_H */ 230