drivers/net/wan/lmc/lmc_proto.c

   1  /*
   2   * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
   3   * All rights reserved.  www.lanmedia.com
   4   *
   5   * This code is written by:
   6   * Andrew Stanley-Jones (asj@cban.com)
   7   * Rob Braun (bbraun@vix.com),
   8   * Michael Graff (explorer@vix.com) and
   9   * Matt Thomas (matt@3am-software.com).
  10   *
  11   * With Help By:
  12   * David Boggs
  13   * Ron Crane
  14   * Allan Cox
  15   *
  16   * This software may be used and distributed according to the terms
  17   * of the GNU General Public License version 2, incorporated herein by reference.
  18   *
  19   * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
  20   */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/string.h>
  24 #include <linux/timer.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/errno.h>
  27 #include <linux/ioport.h>
  28 #include <linux/slab.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/pci.h>
  31 #include <linux/in.h>
  32 #include <linux/if_arp.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/inet.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/bitops.h>
  40
  41 #include <net/syncppp.h>
  42
  43 #include <asm/processor.h>             /* Processor type for cache alignment. */
  44 #include <asm/io.h>
  45 #include <asm/dma.h>
  46 #include <linux/smp.h>
  47
  48 #include "lmc.h"
  49 #include "lmc_var.h"
  50 #include "lmc_debug.h"
  51 #include "lmc_ioctl.h"
  52 #include "lmc_proto.h"
  53
  54 /*
  55  * The compile-time variable SPPPSTUP causes the module to be
  56  * compiled without referencing any of the sync ppp routines.
  57  */
  58 #ifdef SPPPSTUB
  59 #define SPPP_detach(d)  (void)0
  60 #define SPPP_open(d)    0
  61 #define SPPP_reopen(d)  (void)0
  62 #define SPPP_close(d)   (void)0
  63 #define SPPP_attach(d)  (void)0
  64 #define SPPP_do_ioctl(d,i,c)    -EOPNOTSUPP
  65 #else
  66 #define SPPP_attach(x)  sppp_attach((x)->pd)
  67 #define SPPP_detach(x)  sppp_detach((x)->pd->dev)
  68 #define SPPP_open(x)    sppp_open((x)->pd->dev)
  69 #define SPPP_reopen(x)  sppp_reopen((x)->pd->dev)
  70 #define SPPP_close(x)   sppp_close((x)->pd->dev)
  71 #define SPPP_do_ioctl(x, y, z)  sppp_do_ioctl((x)->pd->dev, (y), (z))
  72 #endif
  73
  74 // init
  75 void lmc_proto_init(lmc_softc_t *sc) /*FOLD00*/
  76 {
  77     lmc_trace(sc->lmc_device, "lmc_proto_init in");
  78     switch(sc->if_type){
  79     case LMC_PPP:
  80         sc->pd = kmalloc(sizeof(struct ppp_device), GFP_KERNEL);
  81         if (!sc->pd) {
  82                 printk("lmc_proto_init(): kmalloc failure!\n");
  83                 return;
  84         }
  85         sc->pd->dev = sc->lmc_device;
  86         sc->if_ptr = sc->pd;
  87         break;
  88     case LMC_RAW:
  89         break;
  90     default:
  91         break;
  92     }
  93     lmc_trace(sc->lmc_device, "lmc_proto_init out");
  94 }
  95
  96 // attach
  97 void lmc_proto_attach(lmc_softc_t *sc) /*FOLD00*/
  98 {
  99     lmc_trace(sc->lmc_device, "lmc_proto_attach in");
 100     switch(sc->if_type){
 101     case LMC_PPP:
 102         {
 103             struct net_device *dev = sc->lmc_device;
 104             SPPP_attach(sc);
 105             dev->do_ioctl = lmc_ioctl;
 106         }
 107         break;
 108     case LMC_NET:
 109         {
 110             struct net_device *dev = sc->lmc_device;
 111             /*
 112              * They set a few basics because they don't use sync_ppp
 113              */
 114             dev->flags |= IFF_POINTOPOINT;
 115             dev->hard_header = NULL;
 116             dev->hard_header_len = 0;
 117             dev->addr_len = 0;
 118         }
 119     case LMC_RAW: /* Setup the task queue, maybe we should notify someone? */
 120         {
 121         }
 122     default:
 123         break;
 124     }
 125     lmc_trace(sc->lmc_device, "lmc_proto_attach out");
 126 }
 127
 128 // detach
 129 void lmc_proto_detach(lmc_softc_t *sc) /*FOLD00*/
 130 {
 131     switch(sc->if_type){
 132     case LMC_PPP:
 133         SPPP_detach(sc);
 134         break;
 135     case LMC_RAW: /* Tell someone we're detaching? */
 136         break;
 137     default:
 138         break;
 139     }
 140
 141 }
 142
 143 // reopen
 144 void lmc_proto_reopen(lmc_softc_t *sc) /*FOLD00*/
 145 {
 146     lmc_trace(sc->lmc_device, "lmc_proto_reopen in");
 147     switch(sc->if_type){
 148     case LMC_PPP:
 149         SPPP_reopen(sc);
 150         break;
 151     case LMC_RAW: /* Reset the interface after being down, prerape to receive packets again */
 152         break;
 153     default:
 154         break;
 155     }
 156     lmc_trace(sc->lmc_device, "lmc_proto_reopen out");
 157 }
 158
 159
 160 // ioctl
 161 int lmc_proto_ioctl(lmc_softc_t *sc, struct ifreq *ifr, int cmd) /*FOLD00*/
 162 {
 163     lmc_trace(sc->lmc_device, "lmc_proto_ioctl out");
 164     switch(sc->if_type){
 165     case LMC_PPP:
 166         return SPPP_do_ioctl (sc, ifr, cmd);
 167         break;
 168     default:
 169         return -EOPNOTSUPP;
 170         break;
 171     }
 172     lmc_trace(sc->lmc_device, "lmc_proto_ioctl out");
 173 }
 174
 175 // open
 176 void lmc_proto_open(lmc_softc_t *sc) /*FOLD00*/
 177 {
 178     int ret;
 179
 180     lmc_trace(sc->lmc_device, "lmc_proto_open in");
 181     switch(sc->if_type){
 182     case LMC_PPP:
 183         ret = SPPP_open(sc);
 184         if(ret < 0)
 185             printk("%s: syncPPP open failed: %d\n", sc->name, ret);
 186         break;
 187     case LMC_RAW: /* We're about to start getting packets! */
 188         break;
 189     default:
 190         break;
 191     }
 192     lmc_trace(sc->lmc_device, "lmc_proto_open out");
 193 }
 194
 195 // close
 196
 197 void lmc_proto_close(lmc_softc_t *sc) /*FOLD00*/
 198 {
 199     lmc_trace(sc->lmc_device, "lmc_proto_close in");
 200     switch(sc->if_type){
 201     case LMC_PPP:
 202         SPPP_close(sc);
 203         break;
 204     case LMC_RAW: /* Interface going down */
 205         break;
 206     default:
 207         break;
 208     }
 209     lmc_trace(sc->lmc_device, "lmc_proto_close out");
 210 }
 211
 212 unsigned short lmc_proto_type(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
 213 {
 214     lmc_trace(sc->lmc_device, "lmc_proto_type in");
 215     switch(sc->if_type){
 216     case LMC_PPP:
 217         return htons(ETH_P_WAN_PPP);
 218         break;
 219     case LMC_NET:
 220         return htons(ETH_P_802_2);
 221         break;
 222     case LMC_RAW: /* Packet type for skbuff kind of useless */
 223         return htons(ETH_P_802_2);
 224         break;
 225     default:
 226         printk(KERN_WARNING "%s: No protocol set for this interface, assuming 802.2 (which is wrong!!)\n", sc->name);
 227         return htons(ETH_P_802_2);
 228         break;
 229     }
 230     lmc_trace(sc->lmc_device, "lmc_proto_tye out");
 231
 232 }
 233
 234 void lmc_proto_netif(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
 235 {
 236     lmc_trace(sc->lmc_device, "lmc_proto_netif in");
 237     switch(sc->if_type){
 238     case LMC_PPP:
 239     case LMC_NET:
 240     default:
 241         skb->dev->last_rx = jiffies;
 242         netif_rx(skb);
 243         break;
 244     case LMC_RAW:
 245         break;
 246     }
 247     lmc_trace(sc->lmc_device, "lmc_proto_netif out");
 248 }
 249