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 unsigned char pkt_cnt, pkt_err; 37 unsigned short rx_qlen, tx_qlen; 38 unsigned can_dma_sg:1; 39 40 /* i/o info: pipes etc */ 41 unsigned in, out; 42 struct usb_host_endpoint *status; 43 unsigned maxpacket; 44 struct timer_list delay; 45 const char *padding_pkt; 46 47 /* protocol/interface state */ 48 struct net_device *net; 49 int msg_enable; 50 unsigned long data[5]; 51 u32 xid; 52 u32 hard_mtu; /* count any extra framing */ 53 size_t rx_urb_size; /* size for rx urbs */ 54 struct mii_if_info mii; 55 56 /* various kinds of pending driver work */ 57 struct sk_buff_head rxq; 58 struct sk_buff_head txq; 59 struct sk_buff_head done; 60 struct sk_buff_head rxq_pause; 61 struct urb *interrupt; 62 unsigned interrupt_count; 63 struct mutex interrupt_mutex; 64 struct usb_anchor deferred; 65 struct tasklet_struct bh; 66 67 struct work_struct kevent; 68 unsigned long flags; 69 # define EVENT_TX_HALT 0 70 # define EVENT_RX_HALT 1 71 # define EVENT_RX_MEMORY 2 72 # define EVENT_STS_SPLIT 3 73 # define EVENT_LINK_RESET 4 74 # define EVENT_RX_PAUSED 5 75 # define EVENT_DEV_ASLEEP 6 76 # define EVENT_DEV_OPEN 7 77 # define EVENT_DEVICE_REPORT_IDLE 8 78 # define EVENT_NO_RUNTIME_PM 9 79 # define EVENT_RX_KILL 10 80 # define EVENT_LINK_CHANGE 11 81 }; 82 83 static inline struct usb_driver *driver_of(struct usb_interface *intf) 84 { 85 return to_usb_driver(intf->dev.driver); 86 } 87 88 /* interface from the device/framing level "minidriver" to core */ 89 struct driver_info { 90 char *description; 91 92 int flags; 93 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */ 94 #define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */ 95 #define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */ 96 #define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */ 97 #define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */ 98 99 #define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */ 100 #define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */ 101 102 #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */ 103 #define FLAG_WLAN 0x0080 /* use "wlan%d" names */ 104 #define FLAG_AVOID_UNLINK_URBS 0x0100 /* don't unlink urbs at usbnet_stop() */ 105 #define FLAG_SEND_ZLP 0x0200 /* hw requires ZLPs are sent */ 106 #define FLAG_WWAN 0x0400 /* use "wwan%d" names */ 107 108 #define FLAG_LINK_INTR 0x0800 /* updates link (carrier) status */ 109 110 #define FLAG_POINTTOPOINT 0x1000 /* possibly use "usb%d" names */ 111 112 /* 113 * Indicates to usbnet, that USB driver accumulates multiple IP packets. 114 * Affects statistic (counters) and short packet handling. 115 */ 116 #define FLAG_MULTI_PACKET 0x2000 117 #define FLAG_RX_ASSEMBLE 0x4000 /* rx packets may span >1 frames */ 118 #define FLAG_NOARP 0x8000 /* device can't do ARP */ 119 120 /* init device ... can sleep, or cause probe() failure */ 121 int (*bind)(struct usbnet *, struct usb_interface *); 122 123 /* cleanup device ... can sleep, but can't fail */ 124 void (*unbind)(struct usbnet *, struct usb_interface *); 125 126 /* reset device ... can sleep */ 127 int (*reset)(struct usbnet *); 128 129 /* stop device ... can sleep */ 130 int (*stop)(struct usbnet *); 131 132 /* see if peer is connected ... can sleep */ 133 int (*check_connect)(struct usbnet *); 134 135 /* (dis)activate runtime power management */ 136 int (*manage_power)(struct usbnet *, int); 137 138 /* for status polling */ 139 void (*status)(struct usbnet *, struct urb *); 140 141 /* link reset handling, called from defer_kevent */ 142 int (*link_reset)(struct usbnet *); 143 144 /* fixup rx packet (strip framing) */ 145 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb); 146 147 /* fixup tx packet (add framing) */ 148 struct sk_buff *(*tx_fixup)(struct usbnet *dev, 149 struct sk_buff *skb, gfp_t flags); 150 151 /* early initialization code, can sleep. This is for minidrivers 152 * having 'subminidrivers' that need to do extra initialization 153 * right after minidriver have initialized hardware. */ 154 int (*early_init)(struct usbnet *dev); 155 156 /* called by minidriver when receiving indication */ 157 void (*indication)(struct usbnet *dev, void *ind, int indlen); 158 159 /* for new devices, use the descriptor-reading code instead */ 160 int in; /* rx endpoint */ 161 int out; /* tx endpoint */ 162 163 unsigned long data; /* Misc driver specific data */ 164 }; 165 166 /* Minidrivers are just drivers using the "usbnet" core as a powerful 167 * network-specific subroutine library ... that happens to do pretty 168 * much everything except custom framing and chip-specific stuff. 169 */ 170 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); 171 extern int usbnet_suspend(struct usb_interface *, pm_message_t); 172 extern int usbnet_resume(struct usb_interface *); 173 extern void usbnet_disconnect(struct usb_interface *); 174 extern void usbnet_device_suggests_idle(struct usbnet *dev); 175 176 extern int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, 177 u16 value, u16 index, void *data, u16 size); 178 extern int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, 179 u16 value, u16 index, const void *data, u16 size); 180 extern int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, 181 u16 value, u16 index, void *data, u16 size); 182 extern int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, 183 u16 value, u16 index, const void *data, u16 size); 184 extern int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, 185 u16 value, u16 index, const void *data, u16 size); 186 187 /* Drivers that reuse some of the standard USB CDC infrastructure 188 * (notably, using multiple interfaces according to the CDC 189 * union descriptor) get some helper code. 190 */ 191 struct cdc_state { 192 struct usb_cdc_header_desc *header; 193 struct usb_cdc_union_desc *u; 194 struct usb_cdc_ether_desc *ether; 195 struct usb_interface *control; 196 struct usb_interface *data; 197 }; 198 199 extern int usbnet_generic_cdc_bind(struct usbnet *, struct usb_interface *); 200 extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *); 201 extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *); 202 extern void usbnet_cdc_status(struct usbnet *, struct urb *); 203 204 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */ 205 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 206 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 207 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 208 |USB_CDC_PACKET_TYPE_DIRECTED) 209 210 211 /* we record the state for each of our queued skbs */ 212 enum skb_state { 213 illegal = 0, 214 tx_start, tx_done, 215 rx_start, rx_done, rx_cleanup, 216 unlink_start 217 }; 218 219 struct skb_data { /* skb->cb is one of these */ 220 struct urb *urb; 221 struct usbnet *dev; 222 enum skb_state state; 223 size_t length; 224 }; 225 226 extern int usbnet_open(struct net_device *net); 227 extern int usbnet_stop(struct net_device *net); 228 extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb, 229 struct net_device *net); 230 extern void usbnet_tx_timeout(struct net_device *net); 231 extern int usbnet_change_mtu(struct net_device *net, int new_mtu); 232 233 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *); 234 extern int usbnet_get_ethernet_addr(struct usbnet *, int); 235 extern void usbnet_defer_kevent(struct usbnet *, int); 236 extern void usbnet_skb_return(struct usbnet *, struct sk_buff *); 237 extern void usbnet_unlink_rx_urbs(struct usbnet *); 238 239 extern void usbnet_pause_rx(struct usbnet *); 240 extern void usbnet_resume_rx(struct usbnet *); 241 extern void usbnet_purge_paused_rxq(struct usbnet *); 242 243 extern int usbnet_get_settings(struct net_device *net, 244 struct ethtool_cmd *cmd); 245 extern int usbnet_set_settings(struct net_device *net, 246 struct ethtool_cmd *cmd); 247 extern u32 usbnet_get_link(struct net_device *net); 248 extern u32 usbnet_get_msglevel(struct net_device *); 249 extern void usbnet_set_msglevel(struct net_device *, u32); 250 extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); 251 extern int usbnet_nway_reset(struct net_device *net); 252 253 extern int usbnet_manage_power(struct usbnet *, int); 254 extern void usbnet_link_change(struct usbnet *, bool, bool); 255 256 extern int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags); 257 extern void usbnet_status_stop(struct usbnet *dev); 258 259 extern void usbnet_update_max_qlen(struct usbnet *dev); 260 261 #endif /* __LINUX_USB_USBNET_H */ 262