path: root/drivers/net/wan/sdlamain.c

/****************************************************************************
* sdlamain.c	WANPIPE(tm) Multiprotocol WAN Link Driver.  Main module.
*
* Author:	Nenad Corbic	<ncorbic@sangoma.com>
*		Gideon Hack	
*
* Copyright:	(c) 1995-2000 Sangoma Technologies Inc.
*
*		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.
* ============================================================================
* Dec 22, 2000  Nenad Corbic	Updated for 2.4.X kernels.
* 				Removed the polling routine.
* Nov 13, 2000  Nenad Corbic	Added hw probing on module load and dynamic
* 				device allocation. 
* Nov 7,  2000  Nenad Corbic	Fixed the Multi-Port PPP for kernels
*                               2.2.16 and above.
* Aug 2,  2000  Nenad Corbic	Block the Multi-Port PPP from running on
*  			        kernels 2.2.16 or greater.  The SyncPPP 
*  			        has changed.
* Jul 25, 2000  Nenad Corbic	Updated the Piggiback support for MultPPPP.
* Jul 13, 2000	Nenad Corbic	Added Multi-PPP support.
* Feb 02, 2000  Nenad Corbic    Fixed up piggyback probing and selection.
* Sep 23, 1999  Nenad Corbic    Added support for SMP
* Sep 13, 1999  Nenad Corbic	Each port is treated as a separate device.
* Jun 02, 1999  Gideon Hack     Added support for the S514 adapter.
*				Updates for Linux 2.2.X kernels.
* Sep 17, 1998	Jaspreet Singh	Updated for 2.1.121+ kernel
* Nov 28, 1997	Jaspreet Singh	Changed DRV_RELEASE to 1
* Nov 10, 1997	Jaspreet Singh	Changed sti() to restore_flags();
* Nov 06, 1997 	Jaspreet Singh	Changed DRV_VERSION to 4 and DRV_RELEASE to 0
* Oct 20, 1997 	Jaspreet Singh	Modified sdla_isr routine so that card->in_isr
*				assignments are taken out and placed in the
*				sdla_ppp.c, sdla_fr.c and sdla_x25.c isr
*				routines. Took out 'wandev->tx_int_enabled' and
*				replaced it with 'wandev->enable_tx_int'. 
* May 29, 1997	Jaspreet Singh	Flow Control Problem
*				added "wandev->tx_int_enabled=1" line in the
*				init module. This line initializes the flag for 
*				preventing Interrupt disabled with device set to
*				busy
* Jan 15, 1997	Gene Kozin	Version 3.1.0
*				 o added UDP management stuff
* Jan 02, 1997	Gene Kozin	Initial version.
*****************************************************************************/

#include <linux/config.h>	/* OS configuration options */
#include <linux/stddef.h>	/* offsetof(), etc. */
#include <linux/errno.h>	/* return codes */
#include <linux/string.h>	/* inline memset(), etc. */
#include <linux/init.h>
#include <linux/slab.h>	/* kmalloc(), kfree() */
#include <linux/kernel.h>	/* printk(), and other useful stuff */
#include <linux/module.h>	/* support for loadable modules */
#include <linux/ioport.h>	/* request_region(), release_region() */
#include <linux/wanrouter.h>	/* WAN router definitions */
#include <linux/wanpipe.h>	/* WANPIPE common user API definitions */
#include <linux/rcupdate.h>

#include <linux/in.h>
#include <asm/io.h>		/* phys_to_virt() */
#include <linux/pci.h>
#include <linux/sdlapci.h>
#include <linux/if_wanpipe_common.h>

#include <asm/uaccess.h>	/* kernel <-> user copy */
#include <linux/inetdevice.h>

#include <linux/ip.h>
#include <net/route.h>
 
#define KMEM_SAFETYZONE 8


#ifndef CONFIG_WANPIPE_FR
  #define wpf_init(a,b) (-EPROTONOSUPPORT) 
#endif

#ifndef CONFIG_WANPIPE_CHDLC
 #define wpc_init(a,b) (-EPROTONOSUPPORT) 
#endif

#ifndef CONFIG_WANPIPE_X25
 #define wpx_init(a,b) (-EPROTONOSUPPORT) 
#endif
 
#ifndef CONFIG_WANPIPE_PPP
 #define wpp_init(a,b) (-EPROTONOSUPPORT) 
#endif

#ifndef CONFIG_WANPIPE_MULTPPP 
 #define wsppp_init(a,b) (-EPROTONOSUPPORT) 
#endif
 
 
/***********FOR DEBUGGING PURPOSES*********************************************
static void * dbg_kmalloc(unsigned int size, int prio, int line) {
	int i = 0;
	void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio);
	char * c1 = v;	
	c1 += sizeof(unsigned int);
	*((unsigned int *)v) = size;

	for (i = 0; i < KMEM_SAFETYZONE; i++) {
		c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D';
		c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F';
		c1 += 8;
	}
	c1 += size;
	for (i = 0; i < KMEM_SAFETYZONE; i++) {
		c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G';
		c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L';
		c1 += 8;
	}
	v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8;
	printk(KERN_INFO "line %d  kmalloc(%d,%d) = %p\n",line,size,prio,v);
	return v;
}
static void dbg_kfree(void * v, int line) {
	unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8));
	unsigned int size = *sp;
	char * c1 = ((char *)v) - KMEM_SAFETYZONE*8;
	int i = 0;
	for (i = 0; i < KMEM_SAFETYZONE; i++) {
		if (   c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D'
		    || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') {
			printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v);
			printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8,
			                c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
		}
		c1 += 8;
	}
	c1 += size;
	for (i = 0; i < KMEM_SAFETYZONE; i++) {
		if (   c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G'
		    || c1[4] !=