drivers/net/tokenring/skisa.c - kernel/skids - Git at Google

 /*
  *  skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
  *
  *  Based on tmspci written 1999 by Adam Fritzler
  *
  *  Written 2000 by Jochen Friedrich
  *  Dedicated to my girlfriend Steffi Bopp
  *
  *  This software may be used and distributed according to the terms
  *  of the GNU General Public License, incorporated herein by reference.
  *
  *  This driver module supports the following cards:
  *	- SysKonnect TR4/16(+) ISA	(SK-4190)
  *
  *  Maintainer(s):
  *    AF        Adam Fritzler
  *    JF	Jochen Friedrich	jochen@scram.de
  *
  *  Modification History:
  *	14-Jan-01	JF	Created
  *	28-Oct-02	JF	Fixed probe of card for static compilation.
  *				Fixed module init to not make hotplug go wild.
  *	09-Nov-02	JF	Fixed early bail out on out of memory
  *				situations if multiple cards are found.
  *				Cleaned up some unnecessary console SPAM.
  *	09-Dec-02	JF	Fixed module reference counting.
  *	02-Jan-03	JF	Renamed to skisa.c
  *
  */
 static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/netdevice.h>
 #include <linux/trdevice.h>
 #include <linux/platform_device.h>

 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/pci.h>
 #include <asm/dma.h>

 #include "tms380tr.h"

 #define SK_ISA_IO_EXTENT 32

 /* A zero-terminated list of I/O addresses to be probed. */
 static unsigned int portlist[] __initdata = {
 	0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
 	0
 };

 /* A zero-terminated list of IRQs to be probed.
  * Used again after initial probe for sktr_chipset_init, called from sktr_open.
  */
 static const unsigned short irqlist[] = {
 	3, 5, 9, 10, 11, 12, 15,
 	0
 };

 /* A zero-terminated list of DMAs to be probed. */
 static int dmalist[] __initdata = {
 	5, 6, 7,
 	0
 };

 static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
 static u64 dma_mask = ISA_MAX_ADDRESS;
 static int sk_isa_open(struct net_device *dev);
 static void sk_isa_read_eeprom(struct net_device *dev);
 static unsigned short sk_isa_setnselout_pins(struct net_device *dev);

 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
 {
 	return inb(dev->base_addr + reg);
 }

 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
 {
 	return inw(dev->base_addr + reg);
 }

 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
 {
 	outb(val, dev->base_addr + reg);
 }

 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
 {
 	outw(val, dev->base_addr + reg);
 }


 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
 {
 	unsigned char old, chk1, chk2;

 	if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
 		return -ENODEV;

 	old = inb(ioaddr + SIFADR);	/* Get the old SIFADR value */

 	chk1 = 0;	/* Begin with check value 0 */
 	do {
 		/* Write new SIFADR value */
 		outb(chk1, ioaddr + SIFADR);

 		/* Read, invert and write */
 		chk2 = inb(ioaddr + SIFADD);
 		chk2 ^= 0x0FE;
 		outb(chk2, ioaddr + SIFADR);

 		/* Read, invert and compare */
 		chk2 = inb(ioaddr + SIFADD);
 		chk2 ^= 0x0FE;

 		if(chk1 != chk2) {
 			release_region(ioaddr, SK_ISA_IO_EXTENT);
 			return -ENODEV;
 		}

 		chk1 -= 2;
 	} while(chk1 != 0);	/* Repeat 128 times (all byte values) */

     	/* Restore the SIFADR value */
 	outb(old, ioaddr + SIFADR);

 	dev->base_addr = ioaddr;
 	return 0;
 }

 static struct net_device_ops sk_isa_netdev_ops __read_mostly;

 static int __init setup_card(struct net_device *dev, struct device *pdev)
 {
 	struct net_local *tp;
         static int versionprinted;
 	const unsigned *port;
 	int j, err = 0;

 	if (!dev)
 		return -ENOMEM;

 	if (dev->base_addr)	/* probe specific location */
 		err = sk_isa_probe1(dev, dev->base_addr);
 	else {
 		for (port = portlist; *port; port++) {
 			err = sk_isa_probe1(dev, *port);
 			if (!err)
 				break;
 		}
 	}
 	if (err)
 		goto out5;

 	/* At this point we have found a valid card. */

 	if (versionprinted++ == 0)
 		printk(KERN_DEBUG "%s", version);

 	err = -EIO;
 	pdev->dma_mask = &dma_mask;
 	if (tmsdev_init(dev, pdev))
 		goto out4;

 	dev->base_addr &= ~3;

 	sk_isa_read_eeprom(dev);

 	printk(KERN_DEBUG "skisa.c:    Ring Station Address: %pM\n",
 	       dev->dev_addr);

 	tp = netdev_priv(dev);
 	tp->setnselout = sk_isa_setnselout_pins;

 	tp->sifreadb = sk_isa_sifreadb;
 	tp->sifreadw = sk_isa_sifreadw;
 	tp->sifwriteb = sk_isa_sifwriteb;
 	tp->sifwritew = sk_isa_sifwritew;

 	memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);

 	tp->tmspriv = NULL;

 	dev->netdev_ops = &sk_isa_netdev_ops;

 	if (dev->irq == 0)
 	{
 		for(j = 0; irqlist[j] != 0; j++)
 		{
 			dev->irq = irqlist[j];
 			if (!request_irq(dev->irq, tms380tr_interrupt, 0,
 				isa_cardname, dev))
 				break;
                 }

                 if(irqlist[j] == 0)
                 {
                         printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
 			goto out3;
 		}
 	}
 	else
 	{
 		for(j = 0; irqlist[j] != 0; j++)
 			if (irqlist[j] == dev->irq)
 				break;
 		if (irqlist[j] == 0)
 		{
 			printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
 				dev->irq);
 			goto out3;
 		}
 		if (request_irq(dev->irq, tms380tr_interrupt, 0,
 			isa_cardname, dev))
 		{
                         printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
 				dev->irq);
 			goto out3;
 		}
 	}

 	if (dev->dma == 0)
 	{
 		for(j = 0; dmalist[j] != 0; j++)
 		{
 			dev->dma = dmalist[j];
                         if (!request_dma(dev->dma, isa_cardname))
 				break;
 		}

 		if(dmalist[j] == 0)
 		{
 			printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
 			goto out2;
 		}
 	}
 	else
 	{
 		for(j = 0; dmalist[j] != 0; j++)
 			if (dmalist[j] == dev->dma)
 				break;
 		if (dmalist[j] == 0)
 		{
                         printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
 				dev->dma);
 			goto out2;
 		}
 		if (request_dma(dev->dma, isa_cardname))
 		{
                         printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
 				dev->dma);
 			goto out2;
 		}
 	}

 	err = register_netdev(dev);
 	if (err)
 		goto out;

 	printk(KERN_DEBUG "%s:    IO: %#4lx  IRQ: %d  DMA: %d\n",
 	       dev->name, dev->base_addr, dev->irq, dev->dma);

 	return 0;
 out:
 	free_dma(dev->dma);
 out2:
 	free_irq(dev->irq, dev);
 out3:
 	tmsdev_term(dev);
 out4:
 	release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 out5:
 	return err;
 }

 /*
  * Reads MAC address from adapter RAM, which should've read it from
  * the onboard ROM.
  *
  * Calling this on a board that does not support it can be a very
  * dangerous thing.  The Madge board, for instance, will lock your
  * machine hard when this is called.  Luckily, its supported in a
  * separate driver.  --ASF
  */
 static void sk_isa_read_eeprom(struct net_device *dev)
 {
 	int i;

 	/* Address: 0000:0000 */
 	sk_isa_sifwritew(dev, 0, SIFADX);
 	sk_isa_sifwritew(dev, 0, SIFADR);

 	/* Read six byte MAC address data */
 	dev->addr_len = 6;
 	for(i = 0; i < 6; i++)
 		dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
 }

 static unsigned short sk_isa_setnselout_pins(struct net_device *dev)
 {
 	return 0;
 }

 static int sk_isa_open(struct net_device *dev)
 {
 	struct net_local *tp = netdev_priv(dev);
 	unsigned short val = 0;
 	unsigned short oldval;
 	int i;

 	val = 0;
 	for(i = 0; irqlist[i] != 0; i++)
 	{
 		if(irqlist[i] == dev->irq)
 			break;
 	}

 	val |= CYCLE_TIME << 2;
 	val |= i << 4;
 	i = dev->dma - 5;
 	val |= i;
 	if(tp->DataRate == SPEED_4)
 		val |= LINE_SPEED_BIT;
 	else
 		val &= ~LINE_SPEED_BIT;
 	oldval = sk_isa_sifreadb(dev, POSREG);
 	/* Leave cycle bits alone */
 	oldval |= 0xf3;
 	val &= oldval;
 	sk_isa_sifwriteb(dev, val, POSREG);

 	return tms380tr_open(dev);
 }

 #define ISATR_MAX_ADAPTERS 3

 static int io[ISATR_MAX_ADAPTERS];
 static int irq[ISATR_MAX_ADAPTERS];
 static int dma[ISATR_MAX_ADAPTERS];

 MODULE_LICENSE("GPL");

 module_param_array(io, int, NULL, 0);
 module_param_array(irq, int, NULL, 0);
 module_param_array(dma, int, NULL, 0);

 static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];

 static struct platform_driver sk_isa_driver = {
 	.driver		= {
 		.name	= "skisa",
 	},
 };

 static int __init sk_isa_init(void)
 {
 	struct net_device *dev;
 	struct platform_device *pdev;
 	int i, num = 0, err = 0;

 	sk_isa_netdev_ops = tms380tr_netdev_ops;
 	sk_isa_netdev_ops.ndo_open = sk_isa_open;
 	sk_isa_netdev_ops.ndo_stop = tms380tr_close;

 	err = platform_driver_register(&sk_isa_driver);
 	if (err)
 		return err;

 	for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 		dev = alloc_trdev(sizeof(struct net_local));
 		if (!dev)
 			continue;

 		dev->base_addr = io[i];
 		dev->irq = irq[i];
 		dev->dma = dma[i];
 		pdev = platform_device_register_simple("skisa",
 			i, NULL, 0);
 		if (IS_ERR(pdev)) {
 			free_netdev(dev);
 			continue;
 		}
 		err = setup_card(dev, &pdev->dev);
 		if (!err) {
 			sk_isa_dev[i] = pdev;
 			platform_set_drvdata(sk_isa_dev[i], dev);
 			++num;
 		} else {
 			platform_device_unregister(pdev);
 			free_netdev(dev);
 		}
 	}

 	printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
 	/* Probe for cards. */
 	if (num == 0) {
 		printk(KERN_NOTICE "skisa.c: No cards found.\n");
 		platform_driver_unregister(&sk_isa_driver);
 		return -ENODEV;
 	}
 	return 0;
 }

 static void __exit sk_isa_cleanup(void)
 {
 	struct net_device *dev;
 	int i;

 	for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
 		struct platform_device *pdev = sk_isa_dev[i];

 		if (!pdev)
 			continue;
 		dev = platform_get_drvdata(pdev);
 		unregister_netdev(dev);
 		release_region(dev->base_addr, SK_ISA_IO_EXTENT);
 		free_irq(dev->irq, dev);
 		free_dma(dev->dma);
 		tmsdev_term(dev);
 		free_netdev(dev);
 		platform_set_drvdata(pdev, NULL);
 		platform_device_unregister(pdev);
 	}
 	platform_driver_unregister(&sk_isa_driver);
 }

 module_init(sk_isa_init);
 module_exit(sk_isa_cleanup);
	/*
	* skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
	*
	* Based on tmspci written 1999 by Adam Fritzler
	*
	* Written 2000 by Jochen Friedrich
	* Dedicated to my girlfriend Steffi Bopp
	*
	* This software may be used and distributed according to the terms
	* of the GNU General Public License, incorporated herein by reference.
	*
	* This driver module supports the following cards:
	* - SysKonnect TR4/16(+) ISA (SK-4190)
	*
	* Maintainer(s):
	* AF Adam Fritzler
	* JF Jochen Friedrich jochen@scram.de
	*
	* Modification History:
	* 14-Jan-01 JF Created
	* 28-Oct-02 JF Fixed probe of card for static compilation.
	* Fixed module init to not make hotplug go wild.
	* 09-Nov-02 JF Fixed early bail out on out of memory
	* situations if multiple cards are found.
	* Cleaned up some unnecessary console SPAM.
	* 09-Dec-02 JF Fixed module reference counting.
	* 02-Jan-03 JF Renamed to skisa.c
	*
	*/
	static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/netdevice.h>
	#include <linux/trdevice.h>
	#include <linux/platform_device.h>

	#include <asm/system.h>
	#include <asm/io.h>
	#include <asm/irq.h>
	#include <asm/pci.h>
	#include <asm/dma.h>

	#include "tms380tr.h"

	#define SK_ISA_IO_EXTENT 32

	/* A zero-terminated list of I/O addresses to be probed. */
	static unsigned int portlist[] __initdata = {
	0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
	0
	};

	/* A zero-terminated list of IRQs to be probed.
	* Used again after initial probe for sktr_chipset_init, called from sktr_open.
	*/
	static const unsigned short irqlist[] = {
	3, 5, 9, 10, 11, 12, 15,
	0
	};

	/* A zero-terminated list of DMAs to be probed. */
	static int dmalist[] __initdata = {
	5, 6, 7,
	0
	};

	static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
	static u64 dma_mask = ISA_MAX_ADDRESS;
	static int sk_isa_open(struct net_device *dev);
	static void sk_isa_read_eeprom(struct net_device *dev);
	static unsigned short sk_isa_setnselout_pins(struct net_device *dev);

	static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
	{
	return inb(dev->base_addr + reg);
	}

	static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
	{
	return inw(dev->base_addr + reg);
	}

	static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
	{
	outb(val, dev->base_addr + reg);
	}

	static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
	{
	outw(val, dev->base_addr + reg);
	}


	static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
	{
	unsigned char old, chk1, chk2;

	if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
	return -ENODEV;

	old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */

	chk1 = 0; /* Begin with check value 0 */
	do {
	/* Write new SIFADR value */
	outb(chk1, ioaddr + SIFADR);

	/* Read, invert and write */
	chk2 = inb(ioaddr + SIFADD);
	chk2 ^= 0x0FE;
	outb(chk2, ioaddr + SIFADR);

	/* Read, invert and compare */
	chk2 = inb(ioaddr + SIFADD);
	chk2 ^= 0x0FE;

	if(chk1 != chk2) {
	release_region(ioaddr, SK_ISA_IO_EXTENT);
	return -ENODEV;
	}

	chk1 -= 2;
	} while(chk1 != 0); /* Repeat 128 times (all byte values) */

	/* Restore the SIFADR value */
	outb(old, ioaddr + SIFADR);

	dev->base_addr = ioaddr;
	return 0;
	}

	static struct net_device_ops sk_isa_netdev_ops __read_mostly;

	static int __init setup_card(struct net_device dev, struct device pdev)
	{
	struct net_local *tp;
	static int versionprinted;
	const unsigned *port;
	int j, err = 0;

	if (!dev)
	return -ENOMEM;

	if (dev->base_addr) /* probe specific location */
	err = sk_isa_probe1(dev, dev->base_addr);
	else {
	for (port = portlist; *port; port++) {
	err = sk_isa_probe1(dev, *port);
	if (!err)
	break;
	}
	}
	if (err)
	goto out5;

	/* At this point we have found a valid card. */

	if (versionprinted++ == 0)
	printk(KERN_DEBUG "%s", version);

	err = -EIO;
	pdev->dma_mask = &dma_mask;
	if (tmsdev_init(dev, pdev))
	goto out4;

	dev->base_addr &= ~3;

	sk_isa_read_eeprom(dev);

	printk(KERN_DEBUG "skisa.c: Ring Station Address: %pM\n",
	dev->dev_addr);

	tp = netdev_priv(dev);
	tp->setnselout = sk_isa_setnselout_pins;

	tp->sifreadb = sk_isa_sifreadb;
	tp->sifreadw = sk_isa_sifreadw;
	tp->sifwriteb = sk_isa_sifwriteb;
	tp->sifwritew = sk_isa_sifwritew;

	memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);

	tp->tmspriv = NULL;

	dev->netdev_ops = &sk_isa_netdev_ops;

	if (dev->irq == 0)
	{
	for(j = 0; irqlist[j] != 0; j++)
	{
	dev->irq = irqlist[j];
	if (!request_irq(dev->irq, tms380tr_interrupt, 0,
	isa_cardname, dev))
	break;
	}

	if(irqlist[j] == 0)
	{
	printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
	goto out3;
	}
	}
	else
	{
	for(j = 0; irqlist[j] != 0; j++)
	if (irqlist[j] == dev->irq)
	break;
	if (irqlist[j] == 0)
	{
	printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
	dev->irq);
	goto out3;
	}
	if (request_irq(dev->irq, tms380tr_interrupt, 0,
	isa_cardname, dev))
	{
	printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
	dev->irq);
	goto out3;
	}
	}

	if (dev->dma == 0)
	{
	for(j = 0; dmalist[j] != 0; j++)
	{
	dev->dma = dmalist[j];
	if (!request_dma(dev->dma, isa_cardname))
	break;
	}

	if(dmalist[j] == 0)
	{
	printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
	goto out2;
	}
	}
	else
	{
	for(j = 0; dmalist[j] != 0; j++)
	if (dmalist[j] == dev->dma)
	break;
	if (dmalist[j] == 0)
	{
	printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
	dev->dma);
	goto out2;
	}
	if (request_dma(dev->dma, isa_cardname))
	{
	printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
	dev->dma);
	goto out2;
	}
	}

	err = register_netdev(dev);
	if (err)
	goto out;

	printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
	dev->name, dev->base_addr, dev->irq, dev->dma);

	return 0;
	out:
	free_dma(dev->dma);
	out2:
	free_irq(dev->irq, dev);
	out3:
	tmsdev_term(dev);
	out4:
	release_region(dev->base_addr, SK_ISA_IO_EXTENT);
	out5:
	return err;
	}

	/*
	* Reads MAC address from adapter RAM, which should've read it from
	* the onboard ROM.
	*
	* Calling this on a board that does not support it can be a very
	* dangerous thing. The Madge board, for instance, will lock your
	* machine hard when this is called. Luckily, its supported in a
	* separate driver. --ASF
	*/
	static void sk_isa_read_eeprom(struct net_device *dev)
	{
	int i;

	/* Address: 0000:0000 */
	sk_isa_sifwritew(dev, 0, SIFADX);
	sk_isa_sifwritew(dev, 0, SIFADR);

	/* Read six byte MAC address data */
	dev->addr_len = 6;
	for(i = 0; i < 6; i++)
	dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
	}

	static unsigned short sk_isa_setnselout_pins(struct net_device *dev)
	{
	return 0;
	}

	static int sk_isa_open(struct net_device *dev)
	{
	struct net_local *tp = netdev_priv(dev);
	unsigned short val = 0;
	unsigned short oldval;
	int i;

	val = 0;
	for(i = 0; irqlist[i] != 0; i++)
	{
	if(irqlist[i] == dev->irq)
	break;
	}

	val \|= CYCLE_TIME << 2;
	val \|= i << 4;
	i = dev->dma - 5;
	val \|= i;
	if(tp->DataRate == SPEED_4)
	val \|= LINE_SPEED_BIT;
	else
	val &= ~LINE_SPEED_BIT;
	oldval = sk_isa_sifreadb(dev, POSREG);
	/* Leave cycle bits alone */
	oldval \|= 0xf3;
	val &= oldval;
	sk_isa_sifwriteb(dev, val, POSREG);

	return tms380tr_open(dev);
	}

	#define ISATR_MAX_ADAPTERS 3

	static int io[ISATR_MAX_ADAPTERS];
	static int irq[ISATR_MAX_ADAPTERS];
	static int dma[ISATR_MAX_ADAPTERS];

	MODULE_LICENSE("GPL");

	module_param_array(io, int, NULL, 0);
	module_param_array(irq, int, NULL, 0);
	module_param_array(dma, int, NULL, 0);

	static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];

	static struct platform_driver sk_isa_driver = {
	.driver = {
	.name = "skisa",
	},
	};

	static int __init sk_isa_init(void)
	{
	struct net_device *dev;
	struct platform_device *pdev;
	int i, num = 0, err = 0;

	sk_isa_netdev_ops = tms380tr_netdev_ops;
	sk_isa_netdev_ops.ndo_open = sk_isa_open;
	sk_isa_netdev_ops.ndo_stop = tms380tr_close;

	err = platform_driver_register(&sk_isa_driver);
	if (err)
	return err;

	for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
	dev = alloc_trdev(sizeof(struct net_local));
	if (!dev)
	continue;

	dev->base_addr = io[i];
	dev->irq = irq[i];
	dev->dma = dma[i];
	pdev = platform_device_register_simple("skisa",
	i, NULL, 0);
	if (IS_ERR(pdev)) {
	free_netdev(dev);
	continue;
	}
	err = setup_card(dev, &pdev->dev);
	if (!err) {
	sk_isa_dev[i] = pdev;
	platform_set_drvdata(sk_isa_dev[i], dev);
	++num;
	} else {
	platform_device_unregister(pdev);
	free_netdev(dev);
	}
	}

	printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
	/* Probe for cards. */
	if (num == 0) {
	printk(KERN_NOTICE "skisa.c: No cards found.\n");
	platform_driver_unregister(&sk_isa_driver);
	return -ENODEV;
	}
	return 0;
	}

	static void __exit sk_isa_cleanup(void)
	{
	struct net_device *dev;
	int i;

	for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
	struct platform_device *pdev = sk_isa_dev[i];

	if (!pdev)
	continue;
	dev = platform_get_drvdata(pdev);
	unregister_netdev(dev);
	release_region(dev->base_addr, SK_ISA_IO_EXTENT);
	free_irq(dev->irq, dev);
	free_dma(dev->dma);
	tmsdev_term(dev);
	free_netdev(dev);
	platform_set_drvdata(pdev, NULL);
	platform_device_unregister(pdev);
	}
	platform_driver_unregister(&sk_isa_driver);
	}

	module_init(sk_isa_init);
	module_exit(sk_isa_cleanup);