patch-2.2.14 linux/drivers/net/comx-proto-ppp.c

• Lines: 266
• Date: Tue Jan 4 10:12:17 2000
• Orig file: v2.2.13/linux/drivers/net/comx-proto-ppp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.13/linux/drivers/net/comx-proto-ppp.c linux/drivers/net/comx-proto-ppp.c
@@ -0,0 +1,265 @@
+/*
+ * 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
+ *
+ */
+
+#define VERSION "0.22"
+
+#include <linux/config.h>
+#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 device *dev=(struct device *)d;
+	struct comx_channel *ch=dev->priv;
+	struct syncppp_data *spch=ch->LINE_privdata;
+	struct sppp *sp = &((struct ppp_device *)dev)->sppp;
+        
+	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 device *dev) 
+{
+	clear_bit(0, &dev->tbusy);
+	mark_bh(NET_BH);
+	return 0;
+}
+
+static void syncppp_status(struct device *dev, unsigned short status)
+{
+	status &= ~(PROTO_UP | PROTO_LOOP);
+	if(status & LINE_UP) {
+		dev->tbusy = 0; /* Just to be sure */
+		sppp_open(dev);
+	} else 	{
+		/* Line went down */
+		sppp_close(dev);
+	}
+	comx_status(dev, status);
+}
+
+static int syncppp_open(struct 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 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 device *dev)
+{
+	struct comx_channel *ch = dev->priv;
+
+	if (test_and_set_bit(0, &dev->tbusy)) {
+		ch->stats.tx_errors++;
+        	return 0;
+	}	
+	switch(ch->HW_send_packet(dev, skb)) {
+		case FRAME_QUEUED:
+			clear_bit(0, &dev->tbusy);
+			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 device *dev, char *page) 
+{
+	int len = 0;
+
+	len += sprintf(page + len, " ");
+	return len;
+}
+
+
+static int syncppp_exit(struct 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 device *dev)
+{
+	struct comx_channel *ch = dev->priv;
+	struct ppp_device *pppdev = (struct ppp_device*)dev;
+
+	ch->LINE_privdata = kmalloc(sizeof(struct syncppp_data), GFP_KERNEL);
+
+	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
+
+__initfunc(int 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 */
+