drivers/net/arcnet/com20020.c - kernel/msm-4.9 - Gitiles

 /*
  * Linux ARCnet driver - COM20020 chipset support
  *
  * Written 1997 by David Woodhouse.
  * Written 1994-1999 by Avery Pennarun.
  * Written 1999 by Martin Mares <mj@ucw.cz>.
  * Derived from skeleton.c by Donald Becker.
  *
  * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
  *  for sponsoring the further development of this driver.
  *
  * **********************
  *
  * The original copyright of skeleton.c was as follows:
  *
  * skeleton.c Written 1993 by Donald Becker.
  * Copyright 1993 United States Government as represented by the
  * Director, National Security Agency.  This software may only be used
  * and distributed according to the terms of the GNU General Public License as
  * modified by SRC, incorporated herein by reference.
  *
  * **********************
  *
  * For more details, see drivers/net/arcnet.c
  *
  * **********************
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/ioport.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/init.h>
 #include <linux/arcdevice.h>
 #include <linux/com20020.h>

 #include <asm/io.h>

 #define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n"

 static char *clockrates[] =
 {"10 Mb/s", "Reserved", "5 Mb/s",
  "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",
  "156.25 Kb/s", "Reserved", "Reserved", "Reserved"};

 static void com20020_command(struct net_device *dev, int command);
 static int com20020_status(struct net_device *dev);
 static void com20020_setmask(struct net_device *dev, int mask);
 static int com20020_reset(struct net_device *dev, int really_reset);
 static void com20020_copy_to_card(struct net_device *dev, int bufnum,
 				  int offset, void *buf, int count);
 static void com20020_copy_from_card(struct net_device *dev, int bufnum,
 				    int offset, void *buf, int count);
 static void com20020_set_mc_list(struct net_device *dev);
 static void com20020_close(struct net_device *);

 static void com20020_copy_from_card(struct net_device *dev, int bufnum,
 				    int offset, void *buf, int count)
 {
 	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

 	/* set up the address register */
 	outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
 	outb(ofs & 0xff, _ADDR_LO);

 	/* copy the data */
 	TIME("insb", count, insb(_MEMDATA, buf, count));
 }


 static void com20020_copy_to_card(struct net_device *dev, int bufnum,
 				  int offset, void *buf, int count)
 {
 	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

 	/* set up the address register */
 	outb((ofs >> 8) | AUTOINCflag, _ADDR_HI);
 	outb(ofs & 0xff, _ADDR_LO);

 	/* copy the data */
 	TIME("outsb", count, outsb(_MEMDATA, buf, count));
 }


 /* Reset the card and check some basic stuff during the detection stage. */
 int com20020_check(struct net_device *dev)
 {
 	int ioaddr = dev->base_addr, status;
 	struct arcnet_local *lp = dev->priv;

 	ARCRESET0;
 	mdelay(RESETtime);

 	lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
 	lp->setup2 = (lp->clockm << 4) | 8;

 	/* CHECK: should we do this for SOHARD cards ? */
 	/* Enable P1Mode for backplane mode */
 	lp->setup = lp->setup | P1MODE;

 	SET_SUBADR(SUB_SETUP1);
 	outb(lp->setup, _XREG);

 	if (lp->clockm != 0)
 	{
 		SET_SUBADR(SUB_SETUP2);
 		outb(lp->setup2, _XREG);

 		/* must now write the magic "restart operation" command */
 		mdelay(1);
 		outb(0x18, _COMMAND);
 	}

 	lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2);
 	/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
 	SETCONF;
 	outb(0x42, ioaddr + BUS_ALIGN*7);

 	status = ASTATUS();

 	if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
 		BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status);
 		return -ENODEV;
 	}
 	BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status);

 	/* Enable TX */
 	outb(0x39, _CONFIG);
 	outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7);

 	ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);

 	status = ASTATUS();
 	BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n",
 	       status);

 	/* Read first location of memory */
 	outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI);
 	outb(0, _ADDR_LO);

 	if ((status = inb(_MEMDATA)) != TESTvalue) {
 		BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n",
 		       status);
 		return -ENODEV;
 	}
 	return 0;
 }

 /* Set up the struct net_device associated with this card.  Called after
  * probing succeeds.
  */
 int com20020_found(struct net_device *dev, int shared)
 {
 	struct arcnet_local *lp;
 	int ioaddr = dev->base_addr;

 	/* Initialize the rest of the device structure. */

 	lp = dev->priv;

 	lp->hw.owner = THIS_MODULE;
 	lp->hw.command = com20020_command;
 	lp->hw.status = com20020_status;
 	lp->hw.intmask = com20020_setmask;
 	lp->hw.reset = com20020_reset;
 	lp->hw.copy_to_card = com20020_copy_to_card;
 	lp->hw.copy_from_card = com20020_copy_from_card;
 	lp->hw.close = com20020_close;

 	dev->set_multicast_list = com20020_set_mc_list;

 	if (!dev->dev_addr[0])
 		dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8);	/* FIXME: do this some other way! */

 	SET_SUBADR(SUB_SETUP1);
 	outb(lp->setup, _XREG);

 	if (lp->card_flags & ARC_CAN_10MBIT)
 	{
 		SET_SUBADR(SUB_SETUP2);
 		outb(lp->setup2, _XREG);

 		/* must now write the magic "restart operation" command */
 		mdelay(1);
 		outb(0x18, _COMMAND);
 	}

 	lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1;
 	/* Default 0x38 + register: Node ID */
 	SETCONF;
 	outb(dev->dev_addr[0], _XREG);

 	/* reserve the irq */
 	if (request_irq(dev->irq, &arcnet_interrupt, shared,
 			"arcnet (COM20020)", dev)) {
 		BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
 		return -ENODEV;
 	}

 	dev->base_addr = ioaddr;

 	BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
 	       lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);

 	if (lp->backplane)
 		BUGMSG(D_NORMAL, "Using backplane mode.\n");

 	if (lp->timeout != 3)
 		BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout);

 	BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n",
 	       lp->setup >> 1,
 	       clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]);

 	if (register_netdev(dev)) {
 		free_irq(dev->irq, dev);
 		return -EIO;
 	}
 	return 0;
 }


 /*
  * Do a hardware reset on the card, and set up necessary registers.
  *
  * This should be called as little as possible, because it disrupts the
  * token on the network (causes a RECON) and requires a significant delay.
  *
  * However, it does make sure the card is in a defined state.
  */
 static int com20020_reset(struct net_device *dev, int really_reset)
 {
 	struct arcnet_local *lp = dev->priv;
 	u_int ioaddr = dev->base_addr;
 	u_char inbyte;

 	BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
 		__FILE__,__LINE__,__FUNCTION__,dev,lp,dev->name);
 	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n",
 	       dev->name, ASTATUS());

 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
 	lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2);
 	/* power-up defaults */
 	SETCONF;
 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

 	if (really_reset) {
 		/* reset the card */
 		ARCRESET;
 		mdelay(RESETtime * 2);	/* COM20020 seems to be slower sometimes */
 	}
 	/* clear flags & end reset */
 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
 	ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);

 	/* verify that the ARCnet signature byte is present */
 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

 	com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
 	if (inbyte != TESTvalue) {
 		BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
 		BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
 		return 1;
 	}
 	/* enable extended (512-byte) packets */
 	ACOMMAND(CONFIGcmd | EXTconf);
 	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

 	/* done!  return success. */
 	return 0;
 }


 static void com20020_setmask(struct net_device *dev, int mask)
 {
 	u_int ioaddr = dev->base_addr;
 	BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr);
 	AINTMASK(mask);
 }


 static void com20020_command(struct net_device *dev, int cmd)
 {
 	u_int ioaddr = dev->base_addr;
 	ACOMMAND(cmd);
 }


 static int com20020_status(struct net_device *dev)
 {
 	u_int ioaddr = dev->base_addr;

 	return ASTATUS() + (ADIAGSTATUS()<<8);
 }

 static void com20020_close(struct net_device *dev)
 {
 	struct arcnet_local *lp = dev->priv;
 	int ioaddr = dev->base_addr;

 	/* disable transmitter */
 	lp->config &= ~TXENcfg;
 	SETCONF;
 }

 /* Set or clear the multicast filter for this adaptor.
  * num_addrs == -1    Promiscuous mode, receive all packets
  * num_addrs == 0       Normal mode, clear multicast list
  * num_addrs > 0        Multicast mode, receive normal and MC packets, and do
  *                      best-effort filtering.
  *      FIXME - do multicast stuff, not just promiscuous.
  */
 static void com20020_set_mc_list(struct net_device *dev)
 {
 	struct arcnet_local *lp = dev->priv;
 	int ioaddr = dev->base_addr;

 	if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {	/* Enable promiscuous mode */
 		if (!(lp->setup & PROMISCset))
 			BUGMSG(D_NORMAL, "Setting promiscuous flag...\n");
 		SET_SUBADR(SUB_SETUP1);
 		lp->setup |= PROMISCset;
 		outb(lp->setup, _XREG);
 	} else
 		/* Disable promiscuous mode, use normal mode */
 	{
 		if ((lp->setup & PROMISCset))
 			BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n");
 		SET_SUBADR(SUB_SETUP1);
 		lp->setup &= ~PROMISCset;
 		outb(lp->setup, _XREG);
 	}
 }

 #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
     defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
     defined(CONFIG_ARCNET_COM20020_CS_MODULE)
 EXPORT_SYMBOL(com20020_check);
 EXPORT_SYMBOL(com20020_found);
 #endif

 MODULE_LICENSE("GPL");

 #ifdef MODULE

 static int __init com20020_module_init(void)
 {
 	BUGLVL(D_NORMAL) printk(VERSION);
 	return 0;
 }

 static void __exit com20020_module_exit(void)
 {
 }
 module_init(com20020_module_init);
 module_exit(com20020_module_exit);
 #endif				/* MODULE */
	/*
	* Linux ARCnet driver - COM20020 chipset support
	*
	* Written 1997 by David Woodhouse.
	* Written 1994-1999 by Avery Pennarun.
	* Written 1999 by Martin Mares <mj@ucw.cz>.
	* Derived from skeleton.c by Donald Becker.
	*
	* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
	* for sponsoring the further development of this driver.
	*
	* **********************
	*
	* The original copyright of skeleton.c was as follows:
	*
	* skeleton.c Written 1993 by Donald Becker.
	* Copyright 1993 United States Government as represented by the
	* Director, National Security Agency. This software may only be used
	* and distributed according to the terms of the GNU General Public License as
	* modified by SRC, incorporated herein by reference.
	*
	* **********************
	*
	* For more details, see drivers/net/arcnet.c
	*
	* **********************
	*/
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/ioport.h>
	#include <linux/slab.h>
	#include <linux/errno.h>
	#include <linux/delay.h>
	#include <linux/netdevice.h>
	#include <linux/init.h>
	#include <linux/arcdevice.h>
	#include <linux/com20020.h>

	#include <asm/io.h>

	#define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n"

	static char *clockrates[] =
	{"10 Mb/s", "Reserved", "5 Mb/s",
	"2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",
	"156.25 Kb/s", "Reserved", "Reserved", "Reserved"};

	static void com20020_command(struct net_device *dev, int command);
	static int com20020_status(struct net_device *dev);
	static void com20020_setmask(struct net_device *dev, int mask);
	static int com20020_reset(struct net_device *dev, int really_reset);
	static void com20020_copy_to_card(struct net_device *dev, int bufnum,
	int offset, void *buf, int count);
	static void com20020_copy_from_card(struct net_device *dev, int bufnum,
	int offset, void *buf, int count);
	static void com20020_set_mc_list(struct net_device *dev);
	static void com20020_close(struct net_device *);

	static void com20020_copy_from_card(struct net_device *dev, int bufnum,
	int offset, void *buf, int count)
	{
	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

	/* set up the address register */
	outb((ofs >> 8) \| RDDATAflag \| AUTOINCflag, _ADDR_HI);
	outb(ofs & 0xff, _ADDR_LO);

	/* copy the data */
	TIME("insb", count, insb(_MEMDATA, buf, count));
	}


	static void com20020_copy_to_card(struct net_device *dev, int bufnum,
	int offset, void *buf, int count)
	{
	int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;

	/* set up the address register */
	outb((ofs >> 8) \| AUTOINCflag, _ADDR_HI);
	outb(ofs & 0xff, _ADDR_LO);

	/* copy the data */
	TIME("outsb", count, outsb(_MEMDATA, buf, count));
	}


	/* Reset the card and check some basic stuff during the detection stage. */
	int com20020_check(struct net_device *dev)
	{
	int ioaddr = dev->base_addr, status;
	struct arcnet_local *lp = dev->priv;

	ARCRESET0;
	mdelay(RESETtime);

	lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
	lp->setup2 = (lp->clockm << 4) \| 8;

	/* CHECK: should we do this for SOHARD cards ? */
	/* Enable P1Mode for backplane mode */
	lp->setup = lp->setup \| P1MODE;

	SET_SUBADR(SUB_SETUP1);
	outb(lp->setup, _XREG);

	if (lp->clockm != 0)
	{
	SET_SUBADR(SUB_SETUP2);
	outb(lp->setup2, _XREG);

	/* must now write the magic "restart operation" command */
	mdelay(1);
	outb(0x18, _COMMAND);
	}

	lp->config = 0x21 \| (lp->timeout << 3) \| (lp->backplane << 2);
	/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
	SETCONF;
	outb(0x42, ioaddr + BUS_ALIGN*7);

	status = ASTATUS();

	if ((status & 0x99) != (NORXflag \| TXFREEflag \| RESETflag)) {
	BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status);
	return -ENODEV;
	}
	BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status);

	/* Enable TX */
	outb(0x39, _CONFIG);
	outb(inb(ioaddr + BUS_ALIGN8), ioaddr + BUS_ALIGN7);

	ACOMMAND(CFLAGScmd \| RESETclear \| CONFIGclear);

	status = ASTATUS();
	BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n",
	status);

	/* Read first location of memory */
	outb(0 \| RDDATAflag \| AUTOINCflag, _ADDR_HI);
	outb(0, _ADDR_LO);

	if ((status = inb(_MEMDATA)) != TESTvalue) {
	BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n",
	status);
	return -ENODEV;
	}
	return 0;
	}

	/* Set up the struct net_device associated with this card. Called after
	* probing succeeds.
	*/
	int com20020_found(struct net_device *dev, int shared)
	{
	struct arcnet_local *lp;
	int ioaddr = dev->base_addr;

	/* Initialize the rest of the device structure. */

	lp = dev->priv;

	lp->hw.owner = THIS_MODULE;
	lp->hw.command = com20020_command;
	lp->hw.status = com20020_status;
	lp->hw.intmask = com20020_setmask;
	lp->hw.reset = com20020_reset;
	lp->hw.copy_to_card = com20020_copy_to_card;
	lp->hw.copy_from_card = com20020_copy_from_card;
	lp->hw.close = com20020_close;

	dev->set_multicast_list = com20020_set_mc_list;

	if (!dev->dev_addr[0])
	dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN8); / FIXME: do this some other way! */

	SET_SUBADR(SUB_SETUP1);
	outb(lp->setup, _XREG);

	if (lp->card_flags & ARC_CAN_10MBIT)
	{
	SET_SUBADR(SUB_SETUP2);
	outb(lp->setup2, _XREG);

	/* must now write the magic "restart operation" command */
	mdelay(1);
	outb(0x18, _COMMAND);
	}

	lp->config = 0x20 \| (lp->timeout << 3) \| (lp->backplane << 2) \| 1;
	/* Default 0x38 + register: Node ID */
	SETCONF;
	outb(dev->dev_addr[0], _XREG);

	/* reserve the irq */
	if (request_irq(dev->irq, &arcnet_interrupt, shared,
	"arcnet (COM20020)", dev)) {
	BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
	return -ENODEV;
	}

	dev->base_addr = ioaddr;

	BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
	lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);

	if (lp->backplane)
	BUGMSG(D_NORMAL, "Using backplane mode.\n");

	if (lp->timeout != 3)
	BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout);

	BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n",
	lp->setup >> 1,
	clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]);

	if (register_netdev(dev)) {
	free_irq(dev->irq, dev);
	return -EIO;
	}
	return 0;
	}


	/*
	* Do a hardware reset on the card, and set up necessary registers.
	*
	* This should be called as little as possible, because it disrupts the
	* token on the network (causes a RECON) and requires a significant delay.
	*
	* However, it does make sure the card is in a defined state.
	*/
	static int com20020_reset(struct net_device *dev, int really_reset)
	{
	struct arcnet_local *lp = dev->priv;
	u_int ioaddr = dev->base_addr;
	u_char inbyte;

	BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
	__FILE__,__LINE__,__FUNCTION__,dev,lp,dev->name);
	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n",
	dev->name, ASTATUS());

	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
	lp->config = TXENcfg \| (lp->timeout << 3) \| (lp->backplane << 2);
	/* power-up defaults */
	SETCONF;
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

	if (really_reset) {
	/* reset the card */
	ARCRESET;
	mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */
	}
	/* clear flags & end reset */
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
	ACOMMAND(CFLAGScmd \| RESETclear \| CONFIGclear);

	/* verify that the ARCnet signature byte is present */
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

	com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
	if (inbyte != TESTvalue) {
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);
	BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
	return 1;
	}
	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd \| EXTconf);
	BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__);

	/* done! return success. */
	return 0;
	}


	static void com20020_setmask(struct net_device *dev, int mask)
	{
	u_int ioaddr = dev->base_addr;
	BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr);
	AINTMASK(mask);
	}


	static void com20020_command(struct net_device *dev, int cmd)
	{
	u_int ioaddr = dev->base_addr;
	ACOMMAND(cmd);
	}


	static int com20020_status(struct net_device *dev)
	{
	u_int ioaddr = dev->base_addr;

	return ASTATUS() + (ADIAGSTATUS()<<8);
	}

	static void com20020_close(struct net_device *dev)
	{
	struct arcnet_local *lp = dev->priv;
	int ioaddr = dev->base_addr;

	/* disable transmitter */
	lp->config &= ~TXENcfg;
	SETCONF;
	}

	/* Set or clear the multicast filter for this adaptor.
	* num_addrs == -1 Promiscuous mode, receive all packets
	* num_addrs == 0 Normal mode, clear multicast list
	* num_addrs > 0 Multicast mode, receive normal and MC packets, and do
	* best-effort filtering.
	* FIXME - do multicast stuff, not just promiscuous.
	*/
	static void com20020_set_mc_list(struct net_device *dev)
	{
	struct arcnet_local *lp = dev->priv;
	int ioaddr = dev->base_addr;

	if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */
	if (!(lp->setup & PROMISCset))
	BUGMSG(D_NORMAL, "Setting promiscuous flag...\n");
	SET_SUBADR(SUB_SETUP1);
	lp->setup \|= PROMISCset;
	outb(lp->setup, _XREG);
	} else
	/* Disable promiscuous mode, use normal mode */
	{
	if ((lp->setup & PROMISCset))
	BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n");
	SET_SUBADR(SUB_SETUP1);
	lp->setup &= ~PROMISCset;
	outb(lp->setup, _XREG);
	}
	}

	#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) \|\| \
	defined(CONFIG_ARCNET_COM20020_ISA_MODULE) \|\| \
	defined(CONFIG_ARCNET_COM20020_CS_MODULE)
	EXPORT_SYMBOL(com20020_check);
	EXPORT_SYMBOL(com20020_found);
	#endif

	MODULE_LICENSE("GPL");

	#ifdef MODULE

	static int __init com20020_module_init(void)
	{
	BUGLVL(D_NORMAL) printk(VERSION);
	return 0;
	}

	static void __exit com20020_module_exit(void)
	{
	}
	module_init(com20020_module_init);
	module_exit(com20020_module_exit);
	#endif /* MODULE */