/* am930llc.c: Handles the Linux network interface*	--------------------------------------------------------------------**   Linux WLAN **   The contents of this file are subject to the Mozilla Public*   License Version 1.0 (the "License"); you may not use this file*   except in compliance with the License. You may obtain a copy of*   the License at http://www.mozilla.org/MPL/**   Software distributed under the License is distributed on an "AS*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or*   implied. See the License for the specific language governing*   rights and limitations under the License.**   The initial developer of the original code is Mark S. Mathews*   <mark@absoval.com>.  Portions created by Mark S. Mathews*   are Copyright (C) 1998 AbsoluteValue Software, Inc.  All Rights Reserved.*   *	--------------------------------------------------------------------**	The author may be reached as mark@absoval.com, or C/O AbsoluteValue*	Software Inc., P.O. Box 941149, Maitland, FL, 32794-1149**	Thanks to David Hinds, Donald Becker, and the rest of the Linux*	developers worldwide for making all of this possible.**	--------------------------------------------------------------------**	Seperate file isolating the functions that handle the Linux network*	interface. LLC may not be the appropriate name, but this code _does_*	sit on top of the MAC...**//* The following prevents "kernel_version" from being set in this file. */#define __NO_VERSION__/* PCMCIA headers generated during PCMCIA package installation */#include <pcmcia/config.h>#include <pcmcia/k_compat.h>/* Module related headers, non-module drivers should not include */#include <linux/version.h>/* Standard driver includes */#include <assert.h>#include <linux/delay.h>#include <linux/kernel.h>#include <linux/types.h>#include <linux/fcntl.h>#include <linux/interrupt.h>#include <linux/ptrace.h>#include <linux/ioport.h>#include <linux/in.h>#include <linux/malloc.h>#include <linux/string.h>#include <linux/timer.h>#include <asm/system.h>#include <asm/bitops.h>#include <asm/io.h>#include <linux/errno.h>/* Ethernet and network includes */#include <linux/if_ether.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include <linux/skbuff.h>#include <linux/if_arp.h>#include <linux/ioport.h>/* Card and Driver services includes */#include <pcmcia/version.h>#include <pcmcia/cs_types.h>#include <pcmcia/cs.h>#include <pcmcia/cistpl.h>#include <pcmcia/ds.h>#include <pcmcia/cisreg.h>/* Local Includes */#include <wlan/version.h>#include <wlan/am930const.h>#include <wlan/am930mib.h>#include <wlan/p80211.h>#include <wlan/wlan_ioctl.h>#include "am930debug.h"#include "am930mac.h"#include "am930hw.h"#include "am930mgr.h"#include "am930llc.h"/*================================================================*//* Local Macros  */#define FILEBIT	DBLLC/*================================================================*//* Local Types  */typedef struct enet_statistics	enet_stats_t;typedef struct devpriv{	enet_stats_t	stats;	am930llc_t*		llc;} devpriv_t;typedef int (*do_ioctl_t)(struct device *dev, struct ifreq *ifr, int cmd);/*================================================================*//* Local Functions  */static int am930llc_devinit(device_t *dev);static int am930llc_devopen(device_t *dev);static int am930llc_devstop(device_t *dev);static int am930llc_devhard_start_xmit( struct sk_buff *skb, device_t *dev);static enet_stats_t* am930llc_devgetstats(device_t *dev);static void am930llc_devset_multicast_list(device_t *dev);int am930llc_devdo_ioctl(device_t *dev, wlan_req_t *req, int cmd);void am930llc_dbprt_frame( UINT8* frm, UINT32 len, int isrx );/*================================================================*//* Static variables  *//*================================================================*//*----------------------------------------------------------------*	am930llc_construct**	returns: addr. of the lnd object if successful, NULL otherwise----------------------------------------------------------------*/am930llc_t *am930llc_construct(am930mac_t *mac, am930mgr_t *mgr){	am930llc_t *llc;	DBFENTER;	llc = kmalloc( sizeof(am930llc_t), GFP_KERNEL);	if ( llc != NULL )	{		llc->mac = mac;		llc->mgr = mgr;		/* lets begin the initialization of the linux device */		llc->dev = kmalloc( sizeof(device_t), GFP_KERNEL);		memset( llc->dev, 0, sizeof(device_t));		llc->dev->priv = kmalloc( sizeof(devpriv_t), GFP_KERNEL);		memset( llc->dev->priv, 0, sizeof(devpriv_t));		/* the dev name field will point to the same memory used by the 			node_t field of the pcmcia di object */		llc->dev->name = llc->mac->di->dev->dev_name;		/* set the private data to point back at the llc */		V2P(llc->dev->priv)->llc = llc;		/* set the hardware address */		am930mgr_mibgetitem( llc->mgr, ADDR_MAC_ADDR, llc->dev->dev_addr, 6);		/* set the method pointers */		llc->dev->init					= am930llc_devinit;		llc->dev->open					= am930llc_devopen;		llc->dev->stop					= am930llc_devstop;		llc->dev->hard_start_xmit 		= am930llc_devhard_start_xmit;		llc->dev->get_stats				= am930llc_devgetstats;		llc->dev->set_multicast_list	= am930llc_devset_multicast_list;		llc->dev->do_ioctl				= (do_ioctl_t)am930llc_devdo_ioctl;		ether_setup( llc->dev );		if ( register_netdev(llc->dev) != 0 )		{			DBPRT( DBINIT, "register_netdev failed!\n");			kfree( llc->dev );			llc->dev = NULL;			am930llc_destruct( llc );			llc = NULL;		}		DBPRT( DBINIT, "Device %s registered\n", llc->dev->name);	}	DBFEXIT    return llc;} /*----------------------------------------------------------------*	am930llc_destruct**	returns: nothing----------------------------------------------------------------*/void am930llc_destruct( am930llc_t *llc){	DBFENTER;	if ( llc->dev != NULL )	{		llc->dev->start = 0;		unregister_netdev( llc->dev );		kfree(llc->dev);		llc->dev = NULL;	}	kfree_s( llc, sizeof(am930llc_t));	DBFEXIT;	return;}/*----------------------------------------------------------------*	am930llc_devinit*	init method for the linux net device. Called by *	register_netdevice. For this driver, it doesn't have to do*	anything.**	returns: zero----------------------------------------------------------------*/int am930llc_devinit(device_t *dev){	int result = 0;	DBFENTER;	DBFEXIT;	return result;}/*----------------------------------------------------------------*	am930llc_devopen*	open method for the linux net device. Called when ifconfig*	is used to set up the interface.**	returns: zero----------------------------------------------------------------*/int am930llc_devopen(device_t *dev){	int result = 0;	DBFENTER;	/* set the flags in the device object */	dev->tbusy = 0;	dev->interrupt = 0;	dev->start = 1;	MOD_INC_USE_COUNT;	DBFEXIT;	return result;}/*----------------------------------------------------------------*	am930llc_devstop*	stop method for the linux net device. Called  when ifconfig*	is used to shut down an interface.**	returns: zero----------------------------------------------------------------*/int am930llc_devstop(device_t *dev){	int result = 0;	DBFENTER;	/* set the flags in the device object */	dev->start = 0;	dev->tbusy = 1;	MOD_DEC_USE_COUNT;	DBFEXIT;	return result;}/*----------------------------------------------------------------*	am930llc_devhard_start_xmit*	hard_start_xmint method for the linux net device. Called by *	the higher level protocol code when it has a packet to xmit.**	returns: zero----------------------------------------------------------------*/int am930llc_devhard_start_xmit( struct sk_buff *skb, device_t *dev){	int result = 0;	DBFENTER;	if ( dev->start == 1 )	{		/* If some higher layer thinks we've missed a tx-done, we are passed			NULL. Caution: dev_tint handles the cli/sti ..		*/#if (LINUX_VERSION_CODE < VERSION(2,1,25))		if ( skb == NULL )		{			dev->tbusy = 0;			dev_tint(dev);			return 0;		}#endif		if ( dev->tbusy ) /* shouldn't ever happen */		{			/* printk(KERN_DEBUG"xmit called when tbusy set!\n"); */			/* need to add a reset capability here. see skeleton.c */			result = -EBUSY;		}		else		{#ifdef DEBUG_TXHDR_ETHam930llc_dbprt_frame( skb->data, skb->len, 0 );#endif			dev->trans_start = jiffies;			result = am930mac_txdata( V2P(dev->priv)->llc->mac, 							 skb->data,							 skb->data + 6,							 skb->data, skb->len);			if ( result )			{				dev->tbusy = 1;			}		}		if ( !result )#if (LINUX_VERSION_CODE < VERSION(2,2,0))			dev_kfree_skb( skb, FREE_WRITE);#else		  dev_kfree_skb( skb );#endif	}	DBFEXIT;	return result;}/*----------------------------------------------------------------*	am930llc_rxframe*	Event method called from mac when a frame has been received.**	returns: zero----------------------------------------------------------------*/