drivers/net/wan/lmc/lmc_proto.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2  /*
   3   * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
   4   * All rights reserved.  www.lanmedia.com
   5   *
   6   * This code is written by:
   7   * Andrew Stanley-Jones (asj@cban.com)
   8   * Rob Braun (bbraun@vix.com),
   9   * Michael Graff (explorer@vix.com) and
  10   * Matt Thomas (matt@3am-software.com).
  11   *
  12   * With Help By:
  13   * David Boggs
  14   * Ron Crane
  15   * Allan Cox
  16   *
  17   * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
  18   */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/string.h>
  22 #include <linux/timer.h>
  23 #include <linux/ptrace.h>
  24 #include <linux/errno.h>
  25 #include <linux/ioport.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/in.h>
  28 #include <linux/if_arp.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/inet.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/bitops.h>
  36 #include <asm/processor.h>             /* Processor type for cache alignment. */
  37 #include <asm/io.h>
  38 #include <asm/dma.h>
  39 #include <linux/smp.h>
  40
  41 #include "lmc.h"
  42 #include "lmc_var.h"
  43 #include "lmc_debug.h"
  44 #include "lmc_ioctl.h"
  45 #include "lmc_proto.h"
  46
  47 // attach
  48 void lmc_proto_attach(lmc_softc_t *sc) /*FOLD00*/
  49 {
  50     lmc_trace(sc->lmc_device, "lmc_proto_attach in");
  51     if (sc->if_type == LMC_NET) {
  52             struct net_device *dev = sc->lmc_device;
  53             /*
  54              * They set a few basics because they don't use HDLC
  55              */
  56             dev->flags |= IFF_POINTOPOINT;
  57             dev->hard_header_len = 0;
  58             dev->addr_len = 0;
  59         }
  60     lmc_trace(sc->lmc_device, "lmc_proto_attach out");
  61 }
  62
  63 int lmc_proto_ioctl(lmc_softc_t *sc, struct ifreq *ifr, int cmd)
  64 {
  65         lmc_trace(sc->lmc_device, "lmc_proto_ioctl");
  66         if (sc->if_type == LMC_PPP)
  67                 return hdlc_ioctl(sc->lmc_device, ifr, cmd);
  68         return -EOPNOTSUPP;
  69 }
  70
  71 int lmc_proto_open(lmc_softc_t *sc)
  72 {
  73         int ret = 0;
  74
  75         lmc_trace(sc->lmc_device, "lmc_proto_open in");
  76
  77         if (sc->if_type == LMC_PPP) {
  78                 ret = hdlc_open(sc->lmc_device);
  79                 if (ret < 0)
  80                         printk(KERN_WARNING "%s: HDLC open failed: %d\n",
  81                                sc->name, ret);
  82         }
  83
  84         lmc_trace(sc->lmc_device, "lmc_proto_open out");
  85         return ret;
  86 }
  87
  88 void lmc_proto_close(lmc_softc_t *sc)
  89 {
  90         lmc_trace(sc->lmc_device, "lmc_proto_close in");
  91
  92         if (sc->if_type == LMC_PPP)
  93                 hdlc_close(sc->lmc_device);
  94
  95         lmc_trace(sc->lmc_device, "lmc_proto_close out");
  96 }
  97
  98 __be16 lmc_proto_type(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
  99 {
 100     lmc_trace(sc->lmc_device, "lmc_proto_type in");
 101     switch(sc->if_type){
 102     case LMC_PPP:
 103             return hdlc_type_trans(skb, sc->lmc_device);
 104             break;
 105     case LMC_NET:
 106         return htons(ETH_P_802_2);
 107         break;
 108     case LMC_RAW: /* Packet type for skbuff kind of useless */
 109         return htons(ETH_P_802_2);
 110         break;
 111     default:
 112         printk(KERN_WARNING "%s: No protocol set for this interface, assuming 802.2 (which is wrong!!)\n", sc->name);
 113         return htons(ETH_P_802_2);
 114         break;
 115     }
 116     lmc_trace(sc->lmc_device, "lmc_proto_tye out");
 117
 118 }
 119
 120 void lmc_proto_netif(lmc_softc_t *sc, struct sk_buff *skb) /*FOLD00*/
 121 {
 122     lmc_trace(sc->lmc_device, "lmc_proto_netif in");
 123     switch(sc->if_type){
 124     case LMC_PPP:
 125     case LMC_NET:
 126     default:
 127         netif_rx(skb);
 128         break;
 129     case LMC_RAW:
 130         break;
 131     }
 132     lmc_trace(sc->lmc_device, "lmc_proto_netif out");
 133 }