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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 | /* * Synchronous PPP / Cisco-HDLC driver for the COMX boards * * Author: Gergely Madarasz <gorgo@itc.hu> * * based on skeleton code by Tivadar Szemethy <tiv@itc.hu> * * Copyright (C) 1999 ITConsult-Pro Co. <info@itc.hu> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * * Version 0.10 (99/06/10): * - written the first code :) * * Version 0.20 (99/06/16): * - added hdlc protocol * - protocol up is IFF_RUNNING * * Version 0.21 (99/07/15): * - some small fixes with the line status * * Version 0.22 (99/08/05): * - don't test IFF_RUNNING but the pp_link_state of the sppp * * Version 0.23 (99/12/02): * - tbusy fixes * */ #define VERSION "0.23" #include <linux/module.h> #include <linux/version.h> #include <linux/types.h> #include <linux/sched.h> #include <linux/netdevice.h> #include <linux/proc_fs.h> #include <linux/if_arp.h> #include <linux/inetdevice.h> #include <asm/uaccess.h> #include <linux/init.h> #include "syncppp.h" #include "comx.h" MODULE_AUTHOR("Author: Gergely Madarasz <gorgo@itc.hu>"); MODULE_DESCRIPTION("Cisco-HDLC / Synchronous PPP driver for the COMX sync serial boards"); static struct comx_protocol syncppp_protocol; static struct comx_protocol hdlc_protocol; struct syncppp_data { struct timer_list status_timer; }; static void syncppp_status_timerfun(unsigned long d) { struct net_device *dev=(struct net_device *)d; struct comx_channel *ch=dev->priv; struct syncppp_data *spch=ch->LINE_privdata; struct sppp *sp = (struct sppp *)sppp_of(dev); if(!(ch->line_status & PROTO_UP) && (sp->pp_link_state==SPPP_LINK_UP)) { comx_status(dev, ch->line_status | PROTO_UP); } if((ch->line_status & PROTO_UP) && (sp->pp_link_state==SPPP_LINK_DOWN)) { comx_status(dev, ch->line_status & ~PROTO_UP); } mod_timer(&spch->status_timer,jiffies + HZ*3); } static int syncppp_tx(struct net_device *dev) { struct comx_channel *ch=dev->priv; if(ch->line_status & LINE_UP) { netif_wake_queue(dev); } return 0; } static void syncppp_status(struct net_device *dev, unsigned short status) { status &= ~(PROTO_UP | PROTO_LOOP); if(status & LINE_UP) { netif_wake_queue(dev); sppp_open(dev); } else { /* Line went down */ netif_stop_queue(dev); sppp_close(dev); } comx_status(dev, status); } static int syncppp_open(struct net_device *dev) { struct comx_channel *ch = dev->priv; struct syncppp_data *spch = ch->LINE_privdata; if (!(ch->init_status & HW_OPEN)) return -ENODEV; ch->init_status |= LINE_OPEN; ch->line_status &= ~(PROTO_UP | PROTO_LOOP); if(ch->line_status & LINE_UP) { sppp_open(dev); } init_timer(&spch->status_timer); spch->status_timer.function=syncppp_status_timerfun; spch->status_timer.data=(unsigned long)dev; spch->status_timer.expires=jiffies + HZ*3; add_timer(&spch->status_timer); return 0; } static int syncppp_close(struct net_device *dev) { struct comx_channel *ch = dev->priv; struct syncppp_data *spch = ch->LINE_privdata; if (!(ch->init_status & HW_OPEN)) return -ENODEV; del_timer(&spch->status_timer); sppp_close(dev); ch->init_status &= ~LINE_OPEN; ch->line_status &= ~(PROTO_UP | PROTO_LOOP); return 0; } static int syncppp_xmit(struct sk_buff *skb, struct net_device *dev) { struct comx_channel *ch = dev->priv; netif_stop_queue(dev); switch(ch->HW_send_packet(dev, skb)) { case FRAME_QUEUED: netif_wake_queue(dev); break; case FRAME_ACCEPTED: case FRAME_DROPPED: break; case FRAME_ERROR: printk(KERN_ERR "%s: Transmit frame error (len %d)\n", dev->name, skb->len); break; } return 0; } static int syncppp_statistics(struct net_device *dev, char *page) { int len = 0; len += sprintf(page + len, " "); return len; } static int syncppp_exit(struct net_device *dev) { struct comx_channel *ch = dev->priv; sppp_detach(dev); dev->flags = 0; dev->type = 0; dev->mtu = 0; ch->LINE_rx = NULL; ch->LINE_tx = NULL; ch->LINE_status = NULL; ch->LINE_open = NULL; ch->LINE_close = NULL; ch->LINE_xmit = NULL; ch->LINE_header = NULL; ch->LINE_rebuild_header = NULL; ch->LINE_statistics = NULL; kfree(ch->LINE_privdata); ch->LINE_privdata = NULL; MOD_DEC_USE_COUNT; return 0; } static int syncppp_init(struct net_device *dev) { struct comx_channel *ch = dev->priv; struct ppp_device *pppdev = (struct ppp_device *)ch->if_ptr; ch->LINE_privdata = kmalloc(sizeof(struct syncppp_data), GFP_KERNEL); pppdev->dev = dev; sppp_attach(pppdev); if(ch->protocol == &hdlc_protocol) { pppdev->sppp.pp_flags |= PP_CISCO; dev->type = ARPHRD_HDLC; } else { pppdev->sppp.pp_flags &= ~PP_CISCO; dev->type = ARPHRD_PPP; } ch->LINE_rx = sppp_input; ch->LINE_tx = syncppp_tx; ch->LINE_status = syncppp_status; ch->LINE_open = syncppp_open; ch->LINE_close = syncppp_close; ch->LINE_xmit = syncppp_xmit; ch->LINE_header = NULL; ch->LINE_statistics = syncppp_statistics; MOD_INC_USE_COUNT; return 0; } static struct comx_protocol syncppp_protocol = { "ppp", VERSION, ARPHRD_PPP, syncppp_init, syncppp_exit, NULL }; static struct comx_protocol hdlc_protocol = { "hdlc", VERSION, ARPHRD_PPP, syncppp_init, syncppp_exit, NULL }; #ifdef MODULE #define comx_proto_ppp_init init_module #endif int __init comx_proto_ppp_init(void) { int ret; if(0!=(ret=comx_register_protocol(&hdlc_protocol))) { return ret; } return comx_register_protocol(&syncppp_protocol); } #ifdef MODULE void cleanup_module(void) { comx_unregister_protocol(syncppp_protocol.name); comx_unregister_protocol(hdlc_protocol.name); } #endif /* MODULE */ |