Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1559 insertions, 0 deletions

diff --git a/kernel/drivers/net/ethernet/smsc/smc9194.c b/kernel/drivers/net/ethernet/smsc/smc9194.c
new file mode 100644
index 000000000..67d9fdeed
--- /dev/null
+++ b/kernel/drivers/net/ethernet/smsc/smc9194.c
@@ -0,0 +1,1559 @@
+/*------------------------------------------------------------------------
+ . smc9194.c
+ . This is a driver for SMC's 9000 series of Ethernet cards.
+ .
+ . Copyright (C) 1996 by Erik Stahlman
+ . This software may be used and distributed according to the terms
+ . of the GNU General Public License, incorporated herein by reference.
+ .
+ . "Features" of the SMC chip:
+ .   4608 byte packet memory. ( for the 91C92.  Others have more )
+ .   EEPROM for configuration
+ .   AUI/TP selection  ( mine has 10Base2/10BaseT select )
+ .
+ . Arguments:
+ . 	io		 = for the base address
+ .	irq	 = for the IRQ
+ .	ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 )
+ .
+ . author:
+ . 	Erik Stahlman				( erik@vt.edu )
+ . contributors:
+ .      Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ .
+ . Hardware multicast code from Peter Cammaert ( pc@denkart.be )
+ .
+ . Sources:
+ .    o   SMC databook
+ .    o   skeleton.c by Donald Becker ( becker@scyld.com )
+ .    o   ( a LOT of advice from Becker as well )
+ .
+ . History:
+ .	12/07/95  Erik Stahlman  written, got receive/xmit handled
+ . 	01/03/96  Erik Stahlman  worked out some bugs, actually usable!!! :-)
+ .	01/06/96  Erik Stahlman	 cleaned up some, better testing, etc
+ .	01/29/96  Erik Stahlman	 fixed autoirq, added multicast
+ . 	02/01/96  Erik Stahlman	 1. disabled all interrupts in smc_reset
+ .		   		 2. got rid of post-decrementing bug -- UGH.
+ .	02/13/96  Erik Stahlman  Tried to fix autoirq failure.  Added more
+ .				 descriptive error messages.
+ .	02/15/96  Erik Stahlman  Fixed typo that caused detection failure
+ . 	02/23/96  Erik Stahlman	 Modified it to fit into kernel tree
+ .				 Added support to change hardware address
+ .				 Cleared stats on opens
+ .	02/26/96  Erik Stahlman	 Trial support for Kernel 1.2.13
+ .				 Kludge for automatic IRQ detection
+ .	03/04/96  Erik Stahlman	 Fixed kernel 1.3.70 +
+ .				 Fixed bug reported by Gardner Buchanan in
+ .				   smc_enable, with outw instead of outb
+ .	03/06/96  Erik Stahlman  Added hardware multicast from Peter Cammaert
+ .	04/14/00  Heiko Pruessing (SMA Regelsysteme)  Fixed bug in chip memory
+ .				 allocation
+ .      08/20/00  Arnaldo Melo   fix kfree(skb) in smc_hardware_send_packet
+ .      12/15/00  Christian Jullien fix "Warning: kfree_skb on hard IRQ"
+ .      11/08/01 Matt Domsch     Use common crc32 function
+ ----------------------------------------------------------------------------*/
+
+static const char version[] =
+	"smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+
+#include "smc9194.h"
+
+#define DRV_NAME "smc9194"
+
+/*------------------------------------------------------------------------
+ .
+ . Configuration options, for the experienced user to change.
+ .
+ -------------------------------------------------------------------------*/
+
+/*
+ . Do you want to use 32 bit xfers?  This should work on all chips, as
+ . the chipset is designed to accommodate them.
+*/
+#ifdef __sh__
+#undef USE_32_BIT
+#else
+#define USE_32_BIT 1
+#endif
+
+/*
+ .the SMC9194 can be at any of the following port addresses.  To change,
+ .for a slightly different card, you can add it to the array.  Keep in
+ .mind that the array must end in zero.
+*/
+
+struct devlist {
+	unsigned int port;
+	unsigned int irq;
+};
+
+static struct devlist smc_devlist[] __initdata = {
+	{.port = 0x200, .irq = 0},
+	{.port = 0x220, .irq = 0},
+	{.port = 0x240, .irq = 0},
+	{.port = 0x260, .irq = 0},
+	{.port = 0x280, .irq = 0},
+	{.port = 0x2A0, .irq = 0},
+	{.port = 0x2C0, .irq = 0},
+	{.port = 0x2E0, .irq = 0},
+	{.port = 0x300, .irq = 0},
+	{.port = 0x320, .irq = 0},
+	{.port = 0x340, .irq = 0},
+	{.port = 0x360, .irq = 0},
+	{.port = 0x380, .irq = 0},
+	{.port = 0x3A0, .irq = 0},
+	{.port = 0x3C0, .irq = 0},
+	{.port = 0x3E0, .irq = 0},
+	{.port = 0,     .irq = 0},
+};
+/*
+ . Wait time for memory to be free.  This probably shouldn't be
+ . tuned that much, as waiting for this means nothing else happens
+ . in the system
+*/
+#define MEMORY_WAIT_TIME 16
+
+/*
+ . DEBUGGING LEVELS
+ .
+ . 0 for normal operation
+ . 1 for slightly more details
+ . >2 for various levels of increasingly useless information
+ .    2 for interrupt tracking, status flags
+ .    3 for packet dumps, etc.
+*/
+#define SMC_DEBUG 0
+
+#if (SMC_DEBUG > 2 )
+#define PRINTK3(x) printk x
+#else
+#define PRINTK3(x)
+#endif
+
+#if SMC_DEBUG > 1
+#define PRINTK2(x) printk x
+#else
+#define PRINTK2(x)
+#endif
+
+#ifdef SMC_DEBUG
+#define PRINTK(x) printk x
+#else
+#define PRINTK(x)
+#endif
+
+
+/*------------------------------------------------------------------------
+ .
+ . The internal workings of the driver.  If you are changing anything
+ . here with the SMC stuff, you should have the datasheet and known
+ . what you are doing.
+ .
+ -------------------------------------------------------------------------*/
+#define CARDNAME "SMC9194"
+
+
+/* store this information for the driver.. */
+struct smc_local {
+	/*
+	   If I have to wait until memory is available to send
+	   a packet, I will store the skbuff here, until I get the
+	   desired memory.  Then, I'll send it out and free it.
+	*/
+	struct sk_buff * saved_skb;
+
+	/*
+ 	 . This keeps track of how many packets that I have
+ 	 . sent out.  When an TX_EMPTY interrupt comes, I know
+	 . that all of these have been sent.
+	*/
+	int	packets_waiting;
+};
+
+
+/*-----------------------------------------------------------------
+ .
+ .  The driver can be entered at any of the following entry points.
+ .
+ .------------------------------------------------------------------  */
+
+/*
+ . This is called by  register_netdev().  It is responsible for
+ . checking the portlist for the SMC9000 series chipset.  If it finds
+ . one, then it will initialize the device, find the hardware information,
+ . and sets up the appropriate device parameters.
+ . NOTE: Interrupts are *OFF* when this procedure is called.
+ .
+ . NB:This shouldn't be static since it is referred to externally.
+*/
+struct net_device *smc_init(int unit);
+
+/*
+ . The kernel calls this function when someone wants to use the device,
+ . typically 'ifconfig ethX up'.
+*/
+static int smc_open(struct net_device *dev);
+
+/*
+ . Our watchdog timed out. Called by the networking layer
+*/
+static void smc_timeout(struct net_device *dev);
+
+/*
+ . This is called by the kernel in response to 'ifconfig ethX down'.  It
+ . is responsible for cleaning up everything that the open routine
+ . does, and maybe putting the card into a powerdown state.
+*/
+static int smc_close(struct net_device *dev);
+
+/*
+ . Finally, a call to set promiscuous mode ( for TCPDUMP and related
+ . programs ) and multicast modes.
+*/
+static void smc_set_multicast_list(struct net_device *dev);
+
+
+/*---------------------------------------------------------------
+ .
+ . Interrupt level calls..
+ .
+ ----------------------------------------------------------------*/
+
+/*
+ . Handles the actual interrupt
+*/
+static irqreturn_t smc_interrupt(int irq, void *);
+/*
+ . This is a separate procedure to handle the receipt of a packet, to
+ . leave the interrupt code looking slightly cleaner
+*/
+static inline void smc_rcv( struct net_device *dev );
+/*
+ . This handles a TX interrupt, which is only called when an error
+ . relating to a packet is sent.
+*/
+static inline void smc_tx( struct net_device * dev );
+
+/*
+ ------------------------------------------------------------
+ .
+ . Internal routines
+ .
+ ------------------------------------------------------------
+*/
+
+/*
+ . Test if a given location contains a chip, trying to cause as
+ . little damage as possible if it's not a SMC chip.
+*/
+static int smc_probe(struct net_device *dev, int ioaddr);
+
+/*
+ . A rather simple routine to print out a packet for debugging purposes.
+*/
+#if SMC_DEBUG > 2
+static void print_packet( byte *, int );
+#endif
+
+#define tx_done(dev) 1
+
+/* this is called to actually send the packet to the chip */
+static void smc_hardware_send_packet( struct net_device * dev );
+
+/* Since I am not sure if I will have enough room in the chip's ram
+ . to store the packet, I call this routine, which either sends it
+ . now, or generates an interrupt when the card is ready for the
+ . packet */
+static netdev_tx_t  smc_wait_to_send_packet( struct sk_buff * skb,
+					     struct net_device *dev );
+
+/* this does a soft reset on the device */
+static void smc_reset( int ioaddr );
+
+/* Enable Interrupts, Receive, and Transmit */
+static void smc_enable( int ioaddr );
+
+/* this puts the device in an inactive state */
+static void smc_shutdown( int ioaddr );
+
+/* This routine will find the IRQ of the driver if one is not
+ . specified in the input to the device.  */
+static int smc_findirq( int ioaddr );
+
+/*
+ . Function: smc_reset( int ioaddr )
+ . Purpose:
+ .  	This sets the SMC91xx chip to its normal state, hopefully from whatever
+ . 	mess that any other DOS driver has put it in.
+ .
+ . Maybe I should reset more registers to defaults in here?  SOFTRESET  should
+ . do that for me.
+ .
+ . Method:
+ .	1.  send a SOFT RESET
+ .	2.  wait for it to finish
+ .	3.  enable autorelease mode
+ .	4.  reset the memory management unit
+ .	5.  clear all interrupts
+ .
+*/
+static void smc_reset( int ioaddr )
+{
+	/* This resets the registers mostly to defaults, but doesn't
+	   affect EEPROM.  That seems unnecessary */
+	SMC_SELECT_BANK( 0 );
+	outw( RCR_SOFTRESET, ioaddr + RCR );
+
+	/* this should pause enough for the chip to be happy */
+	SMC_DELAY( );
+
+	/* Set the transmit and receive configuration registers to
+	   default values */
+	outw( RCR_CLEAR, ioaddr + RCR );
+	outw( TCR_CLEAR, ioaddr + TCR );
+
+	/* set the control register to automatically
+	   release successfully transmitted packets, to make the best
+	   use out of our limited memory */
+	SMC_SELECT_BANK( 1 );
+	outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
+
+	/* Reset the MMU */
+	SMC_SELECT_BANK( 2 );
+	outw( MC_RESET, ioaddr + MMU_CMD );
+
+	/* Note:  It doesn't seem that waiting for the MMU busy is needed here,
+	   but this is a place where future chipsets _COULD_ break.  Be wary
+ 	   of issuing another MMU command right after this */
+
+	outb( 0, ioaddr + INT_MASK );
+}
+
+/*
+ . Function: smc_enable
+ . Purpose: let the chip talk to the outside work
+ . Method:
+ .	1.  Enable the transmitter
+ .	2.  Enable the receiver
+ .	3.  Enable interrupts
+*/
+static void smc_enable( int ioaddr )
+{
+	SMC_SELECT_BANK( 0 );
+	/* see the header file for options in TCR/RCR NORMAL*/
+	outw( TCR_NORMAL, ioaddr + TCR );
+	outw( RCR_NORMAL, ioaddr + RCR );
+
+	/* now, enable interrupts */
+	SMC_SELECT_BANK( 2 );
+	outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK );
+}
+
+/*
+ . Function: smc_shutdown
+ . Purpose:  closes down the SMC91xxx chip.
+ . Method:
+ .	1. zero the interrupt mask
+ .	2. clear the enable receive flag
+ .	3. clear the enable xmit flags
+ .
+ . TODO:
+ .   (1) maybe utilize power down mode.
+ .	Why not yet?  Because while the chip will go into power down mode,
+ .	the manual says that it will wake up in response to any I/O requests
+ .	in the register space.   Empirical results do not show this working.
+*/
+static void smc_shutdown( int ioaddr )
+{
+	/* no more interrupts for me */
+	SMC_SELECT_BANK( 2 );
+	outb( 0, ioaddr + INT_MASK );
+
+	/* and tell the card to stay away from that nasty outside world */
+	SMC_SELECT_BANK( 0 );
+	outb( RCR_CLEAR, ioaddr + RCR );
+	outb( TCR_CLEAR, ioaddr + TCR );
+#if 0
+	/* finally, shut the chip down */
+	SMC_SELECT_BANK( 1 );
+	outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL  );
+#endif
+}
+
+
+/*
+ . Function: smc_setmulticast( int ioaddr, struct net_device *dev )
+ . Purpose:
+ .    This sets the internal hardware table to filter out unwanted multicast
+ .    packets before they take up memory.
+ .
+ .    The SMC chip uses a hash table where the high 6 bits of the CRC of
+ .    address are the offset into the table.  If that bit is 1, then the
+ .    multicast packet is accepted.  Otherwise, it's dropped silently.
+ .
+ .    To use the 6 bits as an offset into the table, the high 3 bits are the
+ .    number of the 8 bit register, while the low 3 bits are the bit within
+ .    that register.
+ .
+ . This routine is based very heavily on the one provided by Peter Cammaert.
+*/
+
+
+static void smc_setmulticast(int ioaddr, struct net_device *dev)
+{
+	int			i;
+	unsigned char		multicast_table[ 8 ];
+	struct netdev_hw_addr *ha;
+	/* table for flipping the order of 3 bits */
+	unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
+
+	/* start with a table of all zeros: reject all */
+	memset( multicast_table, 0, sizeof( multicast_table ) );
+
+	netdev_for_each_mc_addr(ha, dev) {
+		int position;
+
+		/* only use the low order bits */
+		position = ether_crc_le(6, ha->addr) & 0x3f;
+
+		/* do some messy swapping to put the bit in the right spot */
+		multicast_table[invert3[position&7]] |=
+					(1<<invert3[(position>>3)&7]);
+
+	}
+	/* now, the table can be loaded into the chipset */
+	SMC_SELECT_BANK( 3 );
+
+	for ( i = 0; i < 8 ; i++ ) {
+		outb( multicast_table[i], ioaddr + MULTICAST1 + i );
+	}
+}
+
+/*
+ . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * )
+ . Purpose:
+ .    Attempt to allocate memory for a packet, if chip-memory is not
+ .    available, then tell the card to generate an interrupt when it
+ .    is available.
+ .
+ . Algorithm:
+ .
+ . o	if the saved_skb is not currently null, then drop this packet
+ .	on the floor.  This should never happen, because of TBUSY.
+ . o	if the saved_skb is null, then replace it with the current packet,
+ . o	See if I can sending it now.
+ . o 	(NO): Enable interrupts and let the interrupt handler deal with it.
+ . o	(YES):Send it now.
+*/
+static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb,
+					   struct net_device *dev)
+{
+	struct smc_local *lp = netdev_priv(dev);
+	unsigned int ioaddr 	= dev->base_addr;
+	word 			length;
+	unsigned short 		numPages;
+	word			time_out;
+
+	netif_stop_queue(dev);
+	/* Well, I want to send the packet.. but I don't know
+	   if I can send it right now...  */
+
+	if ( lp->saved_skb) {
+		/* THIS SHOULD NEVER HAPPEN. */
+		dev->stats.tx_aborted_errors++;
+		printk(CARDNAME": Bad Craziness - sent packet while busy.\n" );
+		return NETDEV_TX_BUSY;
+	}
+	lp->saved_skb = skb;
+
+	length = skb->len;
+
+	if (length < ETH_ZLEN) {
+		if (skb_padto(skb, ETH_ZLEN)) {
+			netif_wake_queue(dev);
+			return NETDEV_TX_OK;
+		}
+		length = ETH_ZLEN;
+	}
+
+	/*
+	** The MMU wants the number of pages to be the number of 256 bytes
+	** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
+	**
+	** Pkt size for allocating is data length +6 (for additional status words,
+	** length and ctl!) If odd size last byte is included in this header.
+	*/
+	numPages =  ((length & 0xfffe) + 6) / 256;
+
+	if (numPages > 7 ) {
+		printk(CARDNAME": Far too big packet error.\n");
+		/* freeing the packet is a good thing here... but should
+		 . any packets of this size get down here?   */
+		dev_kfree_skb (skb);
+		lp->saved_skb = NULL;
+		/* this IS an error, but, i don't want the skb saved */
+		netif_wake_queue(dev);
+		return NETDEV_TX_OK;
+	}
+	/* either way, a packet is waiting now */
+	lp->packets_waiting++;
+
+	/* now, try to allocate the memory */
+	SMC_SELECT_BANK( 2 );
+	outw( MC_ALLOC | numPages, ioaddr + MMU_CMD );
+	/*
+ 	. Performance Hack
+	.
+ 	. wait a short amount of time.. if I can send a packet now, I send
+	. it now.  Otherwise, I enable an interrupt and wait for one to be
+	. available.
+	.
+	. I could have handled this a slightly different way, by checking to
+	. see if any memory was available in the FREE MEMORY register.  However,
+	. either way, I need to generate an allocation, and the allocation works
+	. no matter what, so I saw no point in checking free memory.
+	*/
+	time_out = MEMORY_WAIT_TIME;
+	do {
+		word	status;
+
+		status = inb( ioaddr + INTERRUPT );
+		if ( status & IM_ALLOC_INT ) {
+			/* acknowledge the interrupt */
+			outb( IM_ALLOC_INT, ioaddr + INTERRUPT );
+  			break;
+		}
+   	} while ( -- time_out );
+
+   	if ( !time_out ) {
+		/* oh well, wait until the chip finds memory later */
+		SMC_ENABLE_INT( IM_ALLOC_INT );
+		PRINTK2((CARDNAME": memory allocation deferred.\n"));
+		/* it's deferred, but I'll handle it later */
+		return NETDEV_TX_OK;
+   	}
+	/* or YES! I can send the packet now.. */
+	smc_hardware_send_packet(dev);
+	netif_wake_queue(dev);
+	return NETDEV_TX_OK;
+}
+
+/*
+ . Function:  smc_hardware_send_packet(struct net_device * )
+ . Purpose:
+ .	This sends the actual packet to the SMC9xxx chip.
+ .
+ . Algorithm:
+ . 	First, see if a saved_skb is available.
+ .		( this should NOT be called if there is no 'saved_skb'
+ .	Now, find the packet number that the chip allocated
+ .	Point the data pointers at it in memory
+ .	Set the length word in the chip's memory
+ .	Dump the packet to chip memory
+ .	Check if a last byte is needed ( odd length packet )
+ .		if so, set the control flag right
+ . 	Tell the card to send it
+ .	Enable the transmit interrupt, so I know if it failed
+ . 	Free the kernel data if I actually sent it.
+*/
+static void smc_hardware_send_packet( struct net_device * dev )
+{
+	struct smc_local *lp = netdev_priv(dev);
+	byte	 		packet_no;
+	struct sk_buff * 	skb = lp->saved_skb;
+	word			length;
+	unsigned int		ioaddr;
+	byte			* buf;
+
+	ioaddr = dev->base_addr;
+
+	if ( !skb ) {
+		PRINTK((CARDNAME": In XMIT with no packet to send\n"));
+		return;
+	}
+	length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+	buf = skb->data;
+
+	/* If I get here, I _know_ there is a packet slot waiting for me */
+	packet_no = inb( ioaddr + PNR_ARR + 1 );
+	if ( packet_no & 0x80 ) {
+		/* or isn't there?  BAD CHIP! */
+		netdev_dbg(dev, CARDNAME": Memory allocation failed.\n");
+		dev_kfree_skb_any(skb);
+		lp->saved_skb = NULL;
+		netif_wake_queue(dev);
+		return;
+	}
+
+	/* we have a packet address, so tell the card to use it */
+	outb( packet_no, ioaddr + PNR_ARR );
+
+	/* point to the beginning of the packet */
+	outw( PTR_AUTOINC , ioaddr + POINTER );
+
+	PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length));
+#if SMC_DEBUG > 2
+	print_packet( buf, length );
+#endif
+
+	/* send the packet length ( +6 for status, length and ctl byte )
+ 	   and the status word ( set to zeros ) */
+#ifdef USE_32_BIT
+	outl(  (length +6 ) << 16 , ioaddr + DATA_1 );
+#else
+	outw( 0, ioaddr + DATA_1 );
+	/* send the packet length ( +6 for status words, length, and ctl*/
+	outb( (length+6) & 0xFF,ioaddr + DATA_1 );
+	outb( (length+6) >> 8 , ioaddr + DATA_1 );
+#endif
+
+	/* send the actual data
+	 . I _think_ it's faster to send the longs first, and then
+	 . mop up by sending the last word.  It depends heavily
+ 	 . on alignment, at least on the 486.  Maybe it would be
+ 	 . a good idea to check which is optimal?  But that could take
+	 . almost as much time as is saved?
+	*/
+#ifdef USE_32_BIT
+	if ( length & 0x2  ) {
+		outsl(ioaddr + DATA_1, buf,  length >> 2 );
+		outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
+	}
+	else
+		outsl(ioaddr + DATA_1, buf,  length >> 2 );
+#else
+	outsw(ioaddr + DATA_1 , buf, (length ) >> 1);
+#endif
+	/* Send the last byte, if there is one.   */
+
+	if ( (length & 1) == 0 ) {
+		outw( 0, ioaddr + DATA_1 );
+	} else {
+		outb( buf[length -1 ], ioaddr + DATA_1 );
+		outb( 0x20, ioaddr + DATA_1);
+	}
+
+	/* enable the interrupts */
+	SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) );
+
+	/* and let the chipset deal with it */
+	outw( MC_ENQUEUE , ioaddr + MMU_CMD );
+
+	PRINTK2((CARDNAME": Sent packet of length %d\n", length));
+
+	lp->saved_skb = NULL;
+	dev_kfree_skb_any (skb);
+
+	dev->trans_start = jiffies;
+
+	/* we can send another packet */
+	netif_wake_queue(dev);
+}
+
+/*-------------------------------------------------------------------------
+ |
+ | smc_init(int unit)
+ |   Input parameters:
+ |	dev->base_addr == 0, try to find all possible locations
+ |	dev->base_addr == 1, return failure code
+ |	dev->base_addr == 2, always allocate space,  and return success
+ |	dev->base_addr == <anything else>   this is the address to check
+ |
+ |   Output:
+ |	pointer to net_device or ERR_PTR(error)
+ |
+ ---------------------------------------------------------------------------
+*/
+static int io;
+static int irq;
+static int ifport;
+
+struct net_device * __init smc_init(int unit)
+{
+	struct net_device *dev = alloc_etherdev(sizeof(struct smc_local));
+	struct devlist *smcdev = smc_devlist;
+	int err = 0;
+
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
+	if (unit >= 0) {
+		sprintf(dev->name, "eth%d", unit);
+		netdev_boot_setup_check(dev);
+		io = dev->base_addr;
+		irq = dev->irq;
+	}
+
+	if (io > 0x1ff) {	/* Check a single specified location. */
+		err = smc_probe(dev, io);
+	} else if (io != 0) {	/* Don't probe at all. */
+		err = -ENXIO;
+	} else {
+		for (;smcdev->port; smcdev++) {
+			if (smc_probe(dev, smcdev->port) == 0)
+				break;
+		}
+		if (!smcdev->port)
+			err = -ENODEV;
+	}
+	if (err)
+		goto out;
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+	return dev;
+out1:
+	free_irq(dev->irq, dev);
+	release_region(dev->base_addr, SMC_IO_EXTENT);
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+
+/*----------------------------------------------------------------------
+ . smc_findirq
+ .
+ . This routine has a simple purpose -- make the SMC chip generate an
+ . interrupt, so an auto-detect routine can detect it, and find the IRQ,
+ ------------------------------------------------------------------------
+*/
+static int __init smc_findirq(int ioaddr)
+{
+#ifndef NO_AUTOPROBE
+	int	timeout = 20;
+	unsigned long cookie;
+
+
+	cookie = probe_irq_on();
+
+	/*
+	 * What I try to do here is trigger an ALLOC_INT. This is done
+	 * by allocating a small chunk of memory, which will give an interrupt
+	 * when done.
+	 */
+
+
+	SMC_SELECT_BANK(2);
+	/* enable ALLOCation interrupts ONLY */
+	outb( IM_ALLOC_INT, ioaddr + INT_MASK );
+
+	/*
+ 	 . Allocate 512 bytes of memory.  Note that the chip was just
+	 . reset so all the memory is available
+	*/
+	outw( MC_ALLOC | 1, ioaddr + MMU_CMD );
+
+	/*
+	 . Wait until positive that the interrupt has been generated
+	*/
+	while ( timeout ) {
+		byte	int_status;
+
+		int_status = inb( ioaddr + INTERRUPT );
+
+		if ( int_status & IM_ALLOC_INT )
+			break;		/* got the interrupt */
+		timeout--;
+	}
+	/* there is really nothing that I can do here if timeout fails,
+	   as probe_irq_off will return a 0 anyway, which is what I
+	   want in this case.   Plus, the clean up is needed in both
+	   cases.  */
+
+	/* DELAY HERE!
+	   On a fast machine, the status might change before the interrupt
+	   is given to the processor.  This means that the interrupt was
+	   never detected, and probe_irq_off fails to report anything.
+	   This should fix probe_irq_* problems.
+	*/
+	SMC_DELAY();
+	SMC_DELAY();
+
+	/* and disable all interrupts again */
+	outb( 0, ioaddr + INT_MASK );
+
+	/* and return what I found */
+	return probe_irq_off(cookie);
+#else /* NO_AUTOPROBE */
+	struct devlist *smcdev;
+	for (smcdev = smc_devlist; smcdev->port; smcdev++) {
+		if (smcdev->port == ioaddr)
+			return smcdev->irq;
+	}
+	return 0;
+#endif
+}
+
+static const struct net_device_ops smc_netdev_ops = {
+	.ndo_open		 = smc_open,
+	.ndo_stop		= smc_close,
+	.ndo_start_xmit    	= smc_wait_to_send_packet,
+	.ndo_tx_timeout	    	= smc_timeout,
+	.ndo_set_rx_mode	= smc_set_multicast_list,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+/*----------------------------------------------------------------------
+ . Function: smc_probe( int ioaddr )
+ .
+ . Purpose:
+ .	Tests to see if a given ioaddr points to an SMC9xxx chip.
+ .	Returns a 0 on success
+ .
+ . Algorithm:
+ .	(1) see if the high byte of BANK_SELECT is 0x33
+ . 	(2) compare the ioaddr with the base register's address
+ .	(3) see if I recognize the chip ID in the appropriate register
+ .
+ .---------------------------------------------------------------------
+ */
+
+/*---------------------------------------------------------------
+ . Here I do typical initialization tasks.
+ .
+ . o  Initialize the structure if needed
+ . o  print out my vanity message if not done so already
+ . o  print out what type of hardware is detected
+ . o  print out the ethernet address
+ . o  find the IRQ
+ . o  set up my private data
+ . o  configure the dev structure with my subroutines
+ . o  actually GRAB the irq.
+ . o  GRAB the region
+ .-----------------------------------------------------------------
+*/
+static int __init smc_probe(struct net_device *dev, int ioaddr)
+{
+	int i, memory, retval;
+	unsigned int bank;
+
+	const char *version_string;
+	const char *if_string;
+
+	/* registers */
+	word revision_register;
+	word base_address_register;
+	word configuration_register;
+	word memory_info_register;
+	word memory_cfg_register;
+
+	/* Grab the region so that no one else tries to probe our ioports. */
+	if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
+		return -EBUSY;
+
+	dev->irq = irq;
+	dev->if_port = ifport;
+
+	/* First, see if the high byte is 0x33 */
+	bank = inw( ioaddr + BANK_SELECT );
+	if ( (bank & 0xFF00) != 0x3300 ) {
+		retval = -ENODEV;
+		goto err_out;
+	}
+	/* The above MIGHT indicate a device, but I need to write to further
+ 	 	test this.  */
+	outw( 0x0, ioaddr + BANK_SELECT );
+	bank = inw( ioaddr + BANK_SELECT );
+	if ( (bank & 0xFF00 ) != 0x3300 ) {
+		retval = -ENODEV;
+		goto err_out;
+	}
+	/* well, we've already written once, so hopefully another time won't
+ 	   hurt.  This time, I need to switch the bank register to bank 1,
+	   so I can access the base address register */
+	SMC_SELECT_BANK(1);
+	base_address_register = inw( ioaddr + BASE );
+	if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) )  {
+		printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). "
+			"Probably not a SMC chip\n",
+			ioaddr, base_address_register >> 3 & 0x3E0 );
+		/* well, the base address register didn't match.  Must not have
+		   been a SMC chip after all. */
+		retval = -ENODEV;
+		goto err_out;
+	}
+
+	/*  check if the revision register is something that I recognize.
+	    These might need to be added to later, as future revisions
+	    could be added.  */
+	SMC_SELECT_BANK(3);
+	revision_register  = inw( ioaddr + REVISION );
+	if ( !chip_ids[ ( revision_register  >> 4 ) & 0xF  ] ) {
+		/* I don't recognize this chip, so... */
+		printk(CARDNAME ": IO %x: Unrecognized revision register:"
+			" %x, Contact author.\n", ioaddr, revision_register);
+
+		retval = -ENODEV;
+		goto err_out;
+	}
+
+	/* at this point I'll assume that the chip is an SMC9xxx.
+	   It might be prudent to check a listing of MAC addresses
+	   against the hardware address, or do some other tests. */
+
+	pr_info_once("%s\n", version);
+
+	/* fill in some of the fields */
+	dev->base_addr = ioaddr;
+
+	/*
+ 	 . Get the MAC address ( bank 1, regs 4 - 9 )
+	*/
+	SMC_SELECT_BANK( 1 );
+	for ( i = 0; i < 6; i += 2 ) {
+		word	address;
+
+		address = inw( ioaddr + ADDR0 + i  );
+		dev->dev_addr[ i + 1] = address >> 8;
+		dev->dev_addr[ i ] = address & 0xFF;
+	}
+
+	/* get the memory information */
+
+	SMC_SELECT_BANK( 0 );
+	memory_info_register = inw( ioaddr + MIR );
+	memory_cfg_register  = inw( ioaddr + MCR );
+	memory = ( memory_cfg_register >> 9 )  & 0x7;  /* multiplier */
+	memory *= 256 * ( memory_info_register & 0xFF );
+
+	/*
+	 Now, I want to find out more about the chip.  This is sort of
+ 	 redundant, but it's cleaner to have it in both, rather than having
+ 	 one VERY long probe procedure.
+	*/
+	SMC_SELECT_BANK(3);
+	revision_register  = inw( ioaddr + REVISION );
+	version_string = chip_ids[ ( revision_register  >> 4 ) & 0xF  ];
+	if ( !version_string ) {
+		/* I shouldn't get here because this call was done before.... */
+		retval = -ENODEV;
+		goto err_out;
+	}
+
+	/* is it using AUI or 10BaseT ? */
+	if ( dev->if_port == 0 ) {
+		SMC_SELECT_BANK(1);
+		configuration_register = inw( ioaddr + CONFIG );
+		if ( configuration_register & CFG_AUI_SELECT )
+			dev->if_port = 2;
+		else
+			dev->if_port = 1;
+	}
+	if_string = interfaces[ dev->if_port - 1 ];
+
+	/* now, reset the chip, and put it into a known state */
+	smc_reset( ioaddr );
+
+	/*
+	 . If dev->irq is 0, then the device has to be banged on to see
+	 . what the IRQ is.
+ 	 .
+	 . This banging doesn't always detect the IRQ, for unknown reasons.
+	 . a workaround is to reset the chip and try again.
+	 .
+	 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to
+	 . be what is requested on the command line.   I don't do that, mostly
+	 . because the card that I have uses a non-standard method of accessing
+	 . the IRQs, and because this _should_ work in most configurations.
+	 .
+	 . Specifying an IRQ is done with the assumption that the user knows
+	 . what (s)he is doing.  No checking is done!!!!
+ 	 .
+	*/
+	if ( dev->irq < 2 ) {
+		int	trials;
+
+		trials = 3;
+		while ( trials-- ) {
+			dev->irq = smc_findirq( ioaddr );
+			if ( dev->irq )
+				break;
+			/* kick the card and try again */
+			smc_reset( ioaddr );
+		}
+	}
+	if (dev->irq == 0 ) {
+		printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
+		retval = -ENODEV;
+		goto err_out;
+	}
+
+	/* now, print out the card info, in a short format.. */
+
+	netdev_info(dev, "%s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ",
+		    version_string, revision_register & 0xF, ioaddr, dev->irq,
+		    if_string, memory);
+	/*
+	 . Print the Ethernet address
+	*/
+	netdev_info(dev, "ADDR: %pM\n", dev->dev_addr);
+
+	/* Grab the IRQ */
+	retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev);
+	if (retval) {
+		netdev_warn(dev, "%s: unable to get IRQ %d (irqval=%d).\n",
+			    DRV_NAME, dev->irq, retval);
+		goto err_out;
+	}
+
+	dev->netdev_ops			= &smc_netdev_ops;
+	dev->watchdog_timeo		= HZ/20;
+
+	return 0;
+
+err_out:
+	release_region(ioaddr, SMC_IO_EXTENT);
+	return retval;
+}
+
+#if SMC_DEBUG > 2
+static void print_packet( byte * buf, int length )
+{
+#if 0
+	int i;
+	int remainder;
+	int lines;
+
+	pr_dbg("Packet of length %d\n", length);
+	lines = length / 16;
+	remainder = length % 16;
+
+	for ( i = 0; i < lines ; i ++ ) {
+		int cur;
+
+		printk(KERN_DEBUG);
+		for ( cur = 0; cur < 8; cur ++ ) {
+			byte a, b;
+
+			a = *(buf ++ );
+			b = *(buf ++ );
+			pr_cont("%02x%02x ", a, b);
+		}
+		pr_cont("\n");
+	}
+	printk(KERN_DEBUG);
+	for ( i = 0; i < remainder/2 ; i++ ) {
+		byte a, b;
+
+		a = *(buf ++ );
+		b = *(buf ++ );
+		pr_cont("%02x%02x ", a, b);
+	}
+	pr_cont("\n");
+#endif
+}
+#endif
+
+
+/*
+ * Open and Initialize the board
+ *
+ * Set up everything, reset the card, etc ..
+ *
+ */
+static int smc_open(struct net_device *dev)
+{
+	int	ioaddr = dev->base_addr;
+
+	int	i;	/* used to set hw ethernet address */
+
+	/* clear out all the junk that was put here before... */
+	memset(netdev_priv(dev), 0, sizeof(struct smc_local));
+
+	/* reset the hardware */
+
+	smc_reset( ioaddr );
+	smc_enable( ioaddr );
+
+	/* Select which interface to use */
+
+	SMC_SELECT_BANK( 1 );
+	if ( dev->if_port == 1 ) {
+		outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
+			ioaddr + CONFIG );
+	}
+	else if ( dev->if_port == 2 ) {
+		outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
+			ioaddr + CONFIG );
+	}
+
+	/*
+  		According to Becker, I have to set the hardware address
+		at this point, because the (l)user can set it with an
+		ioctl.  Easily done...
+	*/
+	SMC_SELECT_BANK( 1 );
+	for ( i = 0; i < 6; i += 2 ) {
+		word	address;
+
+		address = dev->dev_addr[ i + 1 ] << 8 ;
+		address  |= dev->dev_addr[ i ];
+		outw( address, ioaddr + ADDR0 + i );
+	}
+
+	netif_start_queue(dev);
+	return 0;
+}
+
+/*--------------------------------------------------------
+ . Called by the kernel to send a packet out into the void
+ . of the net.  This routine is largely based on
+ . skeleton.c, from Becker.
+ .--------------------------------------------------------
+*/
+
+static void smc_timeout(struct net_device *dev)
+{
+	/* If we get here, some higher level has decided we are broken.
+	   There should really be a "kick me" function call instead. */
+	netdev_warn(dev, CARDNAME": transmit timed out, %s?\n",
+		    tx_done(dev) ? "IRQ conflict" : "network cable problem");
+	/* "kick" the adaptor */
+	smc_reset( dev->base_addr );
+	smc_enable( dev->base_addr );
+	dev->trans_start = jiffies; /* prevent tx timeout */
+	/* clear anything saved */
+	((struct smc_local *)netdev_priv(dev))->saved_skb = NULL;
+	netif_wake_queue(dev);
+}
+
+/*-------------------------------------------------------------
+ .
+ . smc_rcv -  receive a packet from the card
+ .
+ . There is ( at least ) a packet waiting to be read from
+ . chip-memory.
+ .
+ . o Read the status
+ . o If an error, record it
+ . o otherwise, read in the packet
+ --------------------------------------------------------------
+*/
+static void smc_rcv(struct net_device *dev)
+{
+	int 	ioaddr = dev->base_addr;
+	int 	packet_number;
+	word	status;
+	word	packet_length;
+
+	/* assume bank 2 */
+
+	packet_number = inw( ioaddr + FIFO_PORTS );
+
+	if ( packet_number & FP_RXEMPTY ) {
+		/* we got called , but nothing was on the FIFO */
+		PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n"));
+		/* don't need to restore anything */
+		return;
+	}
+
+	/*  start reading from the start of the packet */
+	outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
+
+	/* First two words are status and packet_length */
+	status 		= inw( ioaddr + DATA_1 );
+	packet_length 	= inw( ioaddr + DATA_1 );
+
+	packet_length &= 0x07ff;  /* mask off top bits */
+
+	PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
+	/*
+	 . the packet length contains 3 extra words :
+	 . status, length, and an extra word with an odd byte .
+	*/
+	packet_length -= 6;
+
+	if ( !(status & RS_ERRORS ) ){
+		/* do stuff to make a new packet */
+		struct sk_buff  * skb;
+		byte		* data;
+
+		/* read one extra byte */
+		if ( status & RS_ODDFRAME )
+			packet_length++;
+
+		/* set multicast stats */
+		if ( status & RS_MULTICAST )
+			dev->stats.multicast++;
+
+		skb = netdev_alloc_skb(dev, packet_length + 5);
+		if ( skb == NULL ) {
+			dev->stats.rx_dropped++;
+			goto done;
+		}
+
+		/*
+		 ! This should work without alignment, but it could be
+		 ! in the worse case
+		*/
+
+		skb_reserve( skb, 2 );   /* 16 bit alignment */
+
+		data = skb_put( skb, packet_length);
+
+#ifdef USE_32_BIT
+		/* QUESTION:  Like in the TX routine, do I want
+		   to send the DWORDs or the bytes first, or some
+		   mixture.  A mixture might improve already slow PIO
+		   performance  */
+		PRINTK3((" Reading %d dwords (and %d bytes)\n",
+			packet_length >> 2, packet_length & 3 ));
+		insl(ioaddr + DATA_1 , data, packet_length >> 2 );
+		/* read the left over bytes */
+		insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
+			packet_length & 0x3  );
+#else
+		PRINTK3((" Reading %d words and %d byte(s)\n",
+			(packet_length >> 1 ), packet_length & 1 ));
+		insw(ioaddr + DATA_1 , data, packet_length >> 1);
+		if ( packet_length & 1 ) {
+			data += packet_length & ~1;
+			*(data++) = inb( ioaddr + DATA_1 );
+		}
+#endif
+#if	SMC_DEBUG > 2
+			print_packet( data, packet_length );
+#endif
+
+		skb->protocol = eth_type_trans(skb, dev );
+		netif_rx(skb);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += packet_length;
+	} else {
+		/* error ... */
+		dev->stats.rx_errors++;
+
+		if ( status & RS_ALGNERR )  dev->stats.rx_frame_errors++;
+		if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
+			dev->stats.rx_length_errors++;
+		if ( status & RS_BADCRC)	dev->stats.rx_crc_errors++;
+	}
+
+done:
+	/*  error or good, tell the card to get rid of this packet */
+	outw( MC_RELEASE, ioaddr + MMU_CMD );
+}
+
+
+/*************************************************************************
+ . smc_tx
+ .
+ . Purpose:  Handle a transmit error message.   This will only be called
+ .   when an error, because of the AUTO_RELEASE mode.
+ .
+ . Algorithm:
+ .	Save pointer and packet no
+ .	Get the packet no from the top of the queue
+ .	check if it's valid ( if not, is this an error??? )
+ .	read the status word
+ .	record the error
+ .	( resend?  Not really, since we don't want old packets around )
+ .	Restore saved values
+ ************************************************************************/
+static void smc_tx( struct net_device * dev )
+{
+	int	ioaddr = dev->base_addr;
+	struct smc_local *lp = netdev_priv(dev);
+	byte saved_packet;
+	byte packet_no;
+	word tx_status;
+
+
+	/* assume bank 2  */
+
+	saved_packet = inb( ioaddr + PNR_ARR );
+	packet_no = inw( ioaddr + FIFO_PORTS );
+	packet_no &= 0x7F;
+
+	/* select this as the packet to read from */
+	outb( packet_no, ioaddr + PNR_ARR );
+
+	/* read the first word from this packet */
+	outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
+
+	tx_status = inw( ioaddr + DATA_1 );
+	PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status));
+
+	dev->stats.tx_errors++;
+	if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
+	if ( tx_status & TS_LATCOL  ) {
+		netdev_dbg(dev, CARDNAME": Late collision occurred on last xmit.\n");
+		dev->stats.tx_window_errors++;
+	}
+#if 0
+		if ( tx_status & TS_16COL ) { ... }
+#endif
+
+	if ( tx_status & TS_SUCCESS ) {
+		netdev_info(dev, CARDNAME": Successful packet caused interrupt\n");
+	}
+	/* re-enable transmit */
+	SMC_SELECT_BANK( 0 );
+	outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
+
+	/* kill the packet */
+	SMC_SELECT_BANK( 2 );
+	outw( MC_FREEPKT, ioaddr + MMU_CMD );
+
+	/* one less packet waiting for me */
+	lp->packets_waiting--;
+
+	outb( saved_packet, ioaddr + PNR_ARR );
+}
+
+/*--------------------------------------------------------------------
+ .
+ . This is the main routine of the driver, to handle the device when
+ . it needs some attention.
+ .
+ . So:
+ .   first, save state of the chipset
+ .   branch off into routines to handle each case, and acknowledge
+ .	    each to the interrupt register
+ .   and finally restore state.
+ .
+ ---------------------------------------------------------------------*/
+
+static irqreturn_t smc_interrupt(int irq, void * dev_id)
+{
+	struct net_device *dev 	= dev_id;
+	int ioaddr 		= dev->base_addr;
+	struct smc_local *lp = netdev_priv(dev);
+
+	byte	status;
+	word	card_stats;
+	byte	mask;
+	int	timeout;
+	/* state registers */
+	word	saved_bank;
+	word	saved_pointer;
+	int handled = 0;
+
+
+	PRINTK3((CARDNAME": SMC interrupt started\n"));
+
+	saved_bank = inw( ioaddr + BANK_SELECT );
+
+	SMC_SELECT_BANK(2);
+	saved_pointer = inw( ioaddr + POINTER );
+
+	mask = inb( ioaddr + INT_MASK );
+	/* clear all interrupts */
+	outb( 0, ioaddr + INT_MASK );
+
+
+	/* set a timeout value, so I don't stay here forever */
+	timeout = 4;
+
+	PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask));
+	do {
+		/* read the status flag, and mask it */
+		status = inb( ioaddr + INTERRUPT ) & mask;
+		if (!status )
+			break;
+
+		handled = 1;
+
+		PRINTK3((KERN_WARNING CARDNAME
+			": Handling interrupt status %x\n", status));
+
+		if (status & IM_RCV_INT) {
+			/* Got a packet(s). */
+			PRINTK2((KERN_WARNING CARDNAME
+				": Receive Interrupt\n"));
+			smc_rcv(dev);
+		} else if (status & IM_TX_INT ) {
+			PRINTK2((KERN_WARNING CARDNAME
+				": TX ERROR handled\n"));
+			smc_tx(dev);
+			outb(IM_TX_INT, ioaddr + INTERRUPT );
+		} else if (status & IM_TX_EMPTY_INT ) {
+			/* update stats */
+			SMC_SELECT_BANK( 0 );
+			card_stats = inw( ioaddr + COUNTER );
+			/* single collisions */
+			dev->stats.collisions += card_stats & 0xF;
+			card_stats >>= 4;
+			/* multiple collisions */
+			dev->stats.collisions += card_stats & 0xF;
+
+			/* these are for when linux supports these statistics */
+
+			SMC_SELECT_BANK( 2 );
+			PRINTK2((KERN_WARNING CARDNAME
+				": TX_BUFFER_EMPTY handled\n"));
+			outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
+			mask &= ~IM_TX_EMPTY_INT;
+			dev->stats.tx_packets += lp->packets_waiting;
+			lp->packets_waiting = 0;
+
+		} else if (status & IM_ALLOC_INT ) {
+			PRINTK2((KERN_DEBUG CARDNAME
+				": Allocation interrupt\n"));
+			/* clear this interrupt so it doesn't happen again */
+			mask &= ~IM_ALLOC_INT;
+
+			smc_hardware_send_packet( dev );
+
+			/* enable xmit interrupts based on this */
+			mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
+
+			/* and let the card send more packets to me */
+			netif_wake_queue(dev);
+
+			PRINTK2((CARDNAME": Handoff done successfully.\n"));
+		} else if (status & IM_RX_OVRN_INT ) {
+			dev->stats.rx_errors++;
+			dev->stats.rx_fifo_errors++;
+			outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
+		} else if (status & IM_EPH_INT ) {
+			PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n"));
+		} else if (status & IM_ERCV_INT ) {
+			PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n"));
+			outb( IM_ERCV_INT, ioaddr + INTERRUPT );
+		}
+	} while ( timeout -- );
+
+
+	/* restore state register */
+	SMC_SELECT_BANK( 2 );
+	outb( mask, ioaddr + INT_MASK );
+
+	PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask));
+	outw( saved_pointer, ioaddr + POINTER );
+
+	SMC_SELECT_BANK( saved_bank );
+
+	PRINTK3((CARDNAME ": Interrupt done\n"));
+	return IRQ_RETVAL(handled);
+}
+
+
+/*----------------------------------------------------
+ . smc_close
+ .
+ . this makes the board clean up everything that it can
+ . and not talk to the outside world.   Caused by
+ . an 'ifconfig ethX down'
+ .
+ -----------------------------------------------------*/
+static int smc_close(struct net_device *dev)
+{
+	netif_stop_queue(dev);
+	/* clear everything */
+	smc_shutdown( dev->base_addr );
+
+	/* Update the statistics here. */
+	return 0;
+}
+
+/*-----------------------------------------------------------
+ . smc_set_multicast_list
+ .
+ . This routine will, depending on the values passed to it,
+ . either make it accept multicast packets, go into
+ . promiscuous mode ( for TCPDUMP and cousins ) or accept
+ . a select set of multicast packets
+*/
+static void smc_set_multicast_list(struct net_device *dev)
+{
+	short ioaddr = dev->base_addr;
+
+	SMC_SELECT_BANK(0);
+	if ( dev->flags & IFF_PROMISC )
+		outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
+
+/* BUG?  I never disable promiscuous mode if multicasting was turned on.
+   Now, I turn off promiscuous mode, but I don't do anything to multicasting
+   when promiscuous mode is turned on.
+*/
+
+	/* Here, I am setting this to accept all multicast packets.
+	   I don't need to zero the multicast table, because the flag is
+	   checked before the table is
+	*/
+	else if (dev->flags & IFF_ALLMULTI)
+		outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
+
+	/* We just get all multicast packets even if we only want them
+	 . from one source.  This will be changed at some future
+	 . point. */
+	else if (!netdev_mc_empty(dev)) {
+		/* support hardware multicasting */
+
+		/* be sure I get rid of flags I might have set */
+		outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
+			ioaddr + RCR );
+		/* NOTE: this has to set the bank, so make sure it is the
+		   last thing called.  The bank is set to zero at the top */
+		smc_setmulticast(ioaddr, dev);
+	}
+	else  {
+		outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
+			ioaddr + RCR );
+
+		/*
+		  since I'm disabling all multicast entirely, I need to
+		  clear the multicast list
+		*/
+		SMC_SELECT_BANK( 3 );
+		outw( 0, ioaddr + MULTICAST1 );
+		outw( 0, ioaddr + MULTICAST2 );
+		outw( 0, ioaddr + MULTICAST3 );
+		outw( 0, ioaddr + MULTICAST4 );
+	}
+}
+
+#ifdef MODULE
+
+static struct net_device *devSMC9194;
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+module_param(irq, int, 0);
+module_param(ifport, int, 0);
+MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
+MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
+MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
+
+int __init init_module(void)
+{
+	if (io == 0)
+		printk(KERN_WARNING
+		CARDNAME": You shouldn't use auto-probing with insmod!\n" );
+
+	/* copy the parameters from insmod into the device structure */
+	devSMC9194 = smc_init(-1);
+	return PTR_ERR_OR_ZERO(devSMC9194);
+}
+
+void __exit cleanup_module(void)
+{
+	unregister_netdev(devSMC9194);
+	free_irq(devSMC9194->irq, devSMC9194);
+	release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
+	free_netdev(devSMC9194);
+}
+
+#endif /* MODULE */