Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1655 insertions, 0 deletions

diff --git a/drivers/net/wan/sdla.c b/drivers/net/wan/sdla.c
new file mode 100644
index 000000000..bc2c1c7fb
--- /dev/null
+++ b/drivers/net/wan/sdla.c
@@ -0,0 +1,1655 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SDLA		An implementation of a driver for the Sangoma S502/S508 series
+ *		multi-protocol PC interface card.  Initial offering is with 
+ *		the DLCI driver, providing Frame Relay support for linux.
+ *
+ *		Global definitions for the Frame relay interface.
+ *
+ * Version:	@(#)sdla.c   0.30	12 Sep 1996
+ *
+ * Credits:	Sangoma Technologies, for the use of 2 cards for an extended
+ *			period of time.
+ *		David Mandelstam <dm@sangoma.com> for getting me started on 
+ *			this project, and incentive to complete it.
+ *		Gene Kozen <74604.152@compuserve.com> for providing me with
+ *			important information about the cards.
+ *
+ * Author:	Mike McLagan <mike.mclagan@linux.org>
+ *
+ * Changes:
+ *		0.15	Mike McLagan	Improved error handling, packet dropping
+ *		0.20	Mike McLagan	New transmit/receive flags for config
+ *					If in FR mode, don't accept packets from
+ *					non DLCI devices.
+ *		0.25	Mike McLagan	Fixed problem with rejecting packets
+ *					from non DLCI devices.
+ *		0.30	Mike McLagan	Fixed kernel panic when used with modified
+ *					ifconfig
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.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/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/if_frad.h>
+#include <linux/sdla.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/uaccess.h>
+
+static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
+
+static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
+
+static unsigned int valid_mem[] = {
+				    0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000, 
+                                    0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
+                                    0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
+                                    0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
+                                    0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000}; 
+
+static DEFINE_SPINLOCK(sdla_lock);
+
+/*********************************************************
+ *
+ * these are the core routines that access the card itself 
+ *
+ *********************************************************/
+
+#define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
+
+static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
+{
+	char          *temp;
+	const void    *base;
+	int           offset, bytes;
+
+	temp = buf;
+	while(len)
+	{	
+		offset = addr & SDLA_ADDR_MASK;
+		bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
+		base = (const void *) (dev->mem_start + offset);
+
+		SDLA_WINDOW(dev, addr);
+		memcpy(temp, base, bytes);
+
+		addr += bytes;
+		temp += bytes;
+		len  -= bytes;
+	}  
+}
+
+static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&sdla_lock, flags);
+	__sdla_read(dev, addr, buf, len);
+	spin_unlock_irqrestore(&sdla_lock, flags);
+}
+
+static void __sdla_write(struct net_device *dev, int addr, 
+			 const void *buf, short len)
+{
+	const char    *temp;
+	void 	      *base;
+	int           offset, bytes;
+
+	temp = buf;
+	while(len)
+	{
+		offset = addr & SDLA_ADDR_MASK;
+		bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
+		base = (void *) (dev->mem_start + offset);
+
+		SDLA_WINDOW(dev, addr);
+		memcpy(base, temp, bytes);
+
+		addr += bytes;
+		temp += bytes;
+		len  -= bytes;
+	}
+}
+
+static void sdla_write(struct net_device *dev, int addr, 
+		       const void *buf, short len)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sdla_lock, flags);
+	__sdla_write(dev, addr, buf, len);
+	spin_unlock_irqrestore(&sdla_lock, flags);
+}
+
+
+static void sdla_clear(struct net_device *dev)
+{
+	unsigned long flags;
+	char          *base;
+	int           len, addr, bytes;
+
+	len = 65536;	
+	addr = 0;
+	bytes = SDLA_WINDOW_SIZE;
+	base = (void *) dev->mem_start;
+
+	spin_lock_irqsave(&sdla_lock, flags);
+	while(len)
+	{
+		SDLA_WINDOW(dev, addr);
+		memset(base, 0, bytes);
+
+		addr += bytes;
+		len  -= bytes;
+	}
+	spin_unlock_irqrestore(&sdla_lock, flags);
+
+}
+
+static char sdla_byte(struct net_device *dev, int addr)
+{
+	unsigned long flags;
+	char          byte, *temp;
+
+	temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
+
+	spin_lock_irqsave(&sdla_lock, flags);
+	SDLA_WINDOW(dev, addr);
+	byte = *temp;
+	spin_unlock_irqrestore(&sdla_lock, flags);
+
+	return byte;
+}
+
+static void sdla_stop(struct net_device *dev)
+{
+	struct frad_local *flp;
+
+	flp = netdev_priv(dev);
+	switch(flp->type)
+	{
+		case SDLA_S502A:
+			outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
+			flp->state = SDLA_HALT;
+			break;
+		case SDLA_S502E:
+			outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
+			outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
+			flp->state = SDLA_S502E_ENABLE;
+			break;
+		case SDLA_S507:
+			flp->state &= ~SDLA_CPUEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+		case SDLA_S508:
+			flp->state &= ~SDLA_CPUEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+	}
+}
+
+static void sdla_start(struct net_device *dev)
+{
+	struct frad_local *flp;
+
+	flp = netdev_priv(dev);
+	switch(flp->type)
+	{
+		case SDLA_S502A:
+			outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
+			outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
+			flp->state = SDLA_S502A_START;
+			break;
+		case SDLA_S502E:
+			outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
+			outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
+			flp->state = 0;
+			break;
+		case SDLA_S507:
+			flp->state |= SDLA_CPUEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+		case SDLA_S508:
+			flp->state |= SDLA_CPUEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+	}
+}
+
+/****************************************************
+ *
+ * this is used for the S502A/E cards to determine
+ * the speed of the onboard CPU.  Calibration is
+ * necessary for the Frame Relay code uploaded 
+ * later.  Incorrect results cause timing problems
+ * with link checks & status messages
+ *
+ ***************************************************/
+
+static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
+{
+	unsigned long start, done, now;
+	char          resp, *temp;
+
+	start = now = jiffies;
+	done = jiffies + jiffs;
+
+	temp = (void *)dev->mem_start;
+	temp += z80_addr & SDLA_ADDR_MASK;
+	
+	resp = ~resp1;
+	while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
+	{
+		if (jiffies != now)
+		{
+			SDLA_WINDOW(dev, z80_addr);
+			now = jiffies;
+			resp = *temp;
+		}
+	}
+	return time_before(jiffies, done) ? jiffies - start : -1;
+}
+
+/* constants for Z80 CPU speed */
+#define Z80_READY 		'1'	/* Z80 is ready to begin */
+#define LOADER_READY 		'2'	/* driver is ready to begin */
+#define Z80_SCC_OK 		'3'	/* SCC is on board */
+#define Z80_SCC_BAD	 	'4'	/* SCC was not found */
+
+static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
+{
+	int  jiffs;
+	char data;
+
+	sdla_start(dev);
+	if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
+		return -EIO;
+
+	data = LOADER_READY;
+	sdla_write(dev, 0, &data, 1);
+
+	if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
+		return -EIO;
+
+	sdla_stop(dev);
+	sdla_read(dev, 0, &data, 1);
+
+	if (data == Z80_SCC_BAD)
+	{
+		printk("%s: SCC bad\n", dev->name);
+		return -EIO;
+	}
+
+	if (data != Z80_SCC_OK)
+		return -EINVAL;
+
+	if (jiffs < 165)
+		ifr->ifr_mtu = SDLA_CPU_16M;
+	else if (jiffs < 220)
+		ifr->ifr_mtu = SDLA_CPU_10M;
+	else if (jiffs < 258)
+		ifr->ifr_mtu = SDLA_CPU_8M;
+	else if (jiffs < 357)
+		ifr->ifr_mtu = SDLA_CPU_7M;
+	else if (jiffs < 467)
+		ifr->ifr_mtu = SDLA_CPU_5M;
+	else
+		ifr->ifr_mtu = SDLA_CPU_3M;
+ 
+	return 0;
+}
+
+/************************************************
+ *
+ *  Direct interaction with the Frame Relay code 
+ *  starts here.
+ *
+ ************************************************/
+
+struct _dlci_stat 
+{
+	short dlci;
+	char  flags;
+} __packed;
+
+struct _frad_stat 
+{
+	char    flags;
+	struct _dlci_stat dlcis[SDLA_MAX_DLCI];
+};
+
+static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data) 
+{
+	struct _dlci_stat *pstatus;
+	short             *pdlci;
+	int               i;
+	char              *state, line[30];
+
+	switch (ret)
+	{
+		case SDLA_RET_MODEM:
+			state = data;
+			if (*state & SDLA_MODEM_DCD_LOW)
+				netdev_info(dev, "Modem DCD unexpectedly low!\n");
+			if (*state & SDLA_MODEM_CTS_LOW)
+				netdev_info(dev, "Modem CTS unexpectedly low!\n");
+			/* I should probably do something about this! */
+			break;
+
+		case SDLA_RET_CHANNEL_OFF:
+			netdev_info(dev, "Channel became inoperative!\n");
+			/* same here */
+			break;
+
+		case SDLA_RET_CHANNEL_ON:
+			netdev_info(dev, "Channel became operative!\n");
+			/* same here */
+			break;
+
+		case SDLA_RET_DLCI_STATUS:
+			netdev_info(dev, "Status change reported by Access Node\n");
+			len /= sizeof(struct _dlci_stat);
+			for(pstatus = data, i=0;i < len;i++,pstatus++)
+			{
+				if (pstatus->flags & SDLA_DLCI_NEW)
+					state = "new";
+				else if (pstatus->flags & SDLA_DLCI_DELETED)
+					state = "deleted";
+				else if (pstatus->flags & SDLA_DLCI_ACTIVE)
+					state = "active";
+				else
+				{
+					sprintf(line, "unknown status: %02X", pstatus->flags);
+					state = line;
+				}
+				netdev_info(dev, "DLCI %i: %s\n",
+					    pstatus->dlci, state);
+				/* same here */
+			}
+			break;
+
+		case SDLA_RET_DLCI_UNKNOWN:
+			netdev_info(dev, "Received unknown DLCIs:");
+			len /= sizeof(short);
+			for(pdlci = data,i=0;i < len;i++,pdlci++)
+				pr_cont(" %i", *pdlci);
+			pr_cont("\n");
+			break;
+
+		case SDLA_RET_TIMEOUT:
+			netdev_err(dev, "Command timed out!\n");
+			break;
+
+		case SDLA_RET_BUF_OVERSIZE:
+			netdev_info(dev, "Bc/CIR overflow, acceptable size is %i\n",
+				    len);
+			break;
+
+		case SDLA_RET_BUF_TOO_BIG:
+			netdev_info(dev, "Buffer size over specified max of %i\n",
+				    len);
+			break;
+
+		case SDLA_RET_CHANNEL_INACTIVE:
+		case SDLA_RET_DLCI_INACTIVE:
+		case SDLA_RET_CIR_OVERFLOW:
+		case SDLA_RET_NO_BUFS:
+			if (cmd == SDLA_INFORMATION_WRITE)
+				break;
+			fallthrough;
+
+		default: 
+			netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n",
+				   cmd, ret);
+			/* Further processing could be done here */
+			break;
+	}
+}
+
+static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags, 
+                        void *inbuf, short inlen, void *outbuf, short *outlen)
+{
+	static struct _frad_stat status;
+	struct frad_local        *flp;
+	struct sdla_cmd          *cmd_buf;
+	unsigned long            pflags;
+	unsigned long		 jiffs;
+	int                      ret, waiting, len;
+	long                     window;
+
+	flp = netdev_priv(dev);
+	window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
+	cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
+	ret = 0;
+	len = 0;
+	jiffs = jiffies + HZ;  /* 1 second is plenty */
+
+	spin_lock_irqsave(&sdla_lock, pflags);
+	SDLA_WINDOW(dev, window);
+	cmd_buf->cmd = cmd;
+	cmd_buf->dlci = dlci;
+	cmd_buf->flags = flags;
+
+	if (inbuf)
+		memcpy(cmd_buf->data, inbuf, inlen);
+
+	cmd_buf->length = inlen;
+
+	cmd_buf->opp_flag = 1;
+	spin_unlock_irqrestore(&sdla_lock, pflags);
+
+	waiting = 1;
+	len = 0;
+	while (waiting && time_before_eq(jiffies, jiffs))
+	{
+		if (waiting++ % 3) 
+		{
+			spin_lock_irqsave(&sdla_lock, pflags);
+			SDLA_WINDOW(dev, window);
+			waiting = ((volatile int)(cmd_buf->opp_flag));
+			spin_unlock_irqrestore(&sdla_lock, pflags);
+		}
+	}
+	
+	if (!waiting)
+	{
+
+		spin_lock_irqsave(&sdla_lock, pflags);
+		SDLA_WINDOW(dev, window);
+		ret = cmd_buf->retval;
+		len = cmd_buf->length;
+		if (outbuf && outlen)
+		{
+			*outlen = *outlen >= len ? len : *outlen;
+
+			if (*outlen)
+				memcpy(outbuf, cmd_buf->data, *outlen);
+		}
+
+		/* This is a local copy that's used for error handling */
+		if (ret)
+			memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
+
+		spin_unlock_irqrestore(&sdla_lock, pflags);
+	}
+	else
+		ret = SDLA_RET_TIMEOUT;
+
+	if (ret != SDLA_RET_OK)
+	   	sdla_errors(dev, cmd, dlci, ret, len, &status);
+
+	return ret;
+}
+
+/***********************************************
+ *
+ * these functions are called by the DLCI driver 
+ *
+ ***********************************************/
+
+static int sdla_reconfig(struct net_device *dev);
+
+static int sdla_activate(struct net_device *slave, struct net_device *master)
+{
+	struct frad_local *flp;
+	int i;
+
+	flp = netdev_priv(slave);
+
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->master[i] == master)
+			break;
+
+	if (i == CONFIG_DLCI_MAX)
+		return -ENODEV;
+
+	flp->dlci[i] = abs(flp->dlci[i]);
+
+	if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
+		sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
+
+	return 0;
+}
+
+static int sdla_deactivate(struct net_device *slave, struct net_device *master)
+{
+	struct frad_local *flp;
+	int               i;
+
+	flp = netdev_priv(slave);
+
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->master[i] == master)
+			break;
+
+	if (i == CONFIG_DLCI_MAX)
+		return -ENODEV;
+
+	flp->dlci[i] = -abs(flp->dlci[i]);
+
+	if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
+		sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
+
+	return 0;
+}
+
+static int sdla_assoc(struct net_device *slave, struct net_device *master)
+{
+	struct frad_local *flp;
+	int               i;
+
+	if (master->type != ARPHRD_DLCI)
+		return -EINVAL;
+
+	flp = netdev_priv(slave);
+
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+	{
+		if (!flp->master[i])
+			break;
+		if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
+			return -EADDRINUSE;
+	} 
+
+	if (i == CONFIG_DLCI_MAX)
+		return -EMLINK;  /* #### Alan: Comments on this ?? */
+
+
+	flp->master[i] = master;
+	flp->dlci[i] = -*(short *)(master->dev_addr);
+	master->mtu = slave->mtu;
+
+	if (netif_running(slave)) {
+		if (flp->config.station == FRAD_STATION_CPE)
+			sdla_reconfig(slave);
+		else
+			sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
+	}
+
+	return 0;
+}
+
+static int sdla_deassoc(struct net_device *slave, struct net_device *master)
+{
+	struct frad_local *flp;
+	int               i;
+
+	flp = netdev_priv(slave);
+
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->master[i] == master)
+			break;
+
+	if (i == CONFIG_DLCI_MAX)
+		return -ENODEV;
+
+	flp->master[i] = NULL;
+	flp->dlci[i] = 0;
+
+
+	if (netif_running(slave)) {
+		if (flp->config.station == FRAD_STATION_CPE)
+			sdla_reconfig(slave);
+		else
+			sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
+	}
+
+	return 0;
+}
+
+static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
+{
+	struct frad_local *flp;
+	struct dlci_local *dlp;
+	int               i;
+	short             len, ret;
+
+	flp = netdev_priv(slave);
+
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->master[i] == master)
+			break;
+
+	if (i == CONFIG_DLCI_MAX)
+		return -ENODEV;
+
+	dlp = netdev_priv(master);
+
+	ret = SDLA_RET_OK;
+	len = sizeof(struct dlci_conf);
+	if (netif_running(slave)) {
+		if (get)
+			ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
+			            NULL, 0, &dlp->config, &len);
+		else
+			ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
+			            &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
+	}
+
+	return ret == SDLA_RET_OK ? 0 : -EIO;
+}
+
+/**************************
+ *
+ * now for the Linux driver 
+ *
+ **************************/
+
+/* NOTE: the DLCI driver deals with freeing the SKB!! */
+static netdev_tx_t sdla_transmit(struct sk_buff *skb,
+				 struct net_device *dev)
+{
+	struct frad_local *flp;
+	int               ret, addr, accept, i;
+	short             size;
+	unsigned long     flags;
+	struct buf_entry  *pbuf;
+
+	flp = netdev_priv(dev);
+	ret = 0;
+	accept = 1;
+
+	netif_stop_queue(dev);
+
+	/*
+	 * stupid GateD insists on setting up the multicast router thru us
+	 * and we're ill equipped to handle a non Frame Relay packet at this
+	 * time!
+	 */
+
+	accept = 1;
+	switch (dev->type)
+	{
+		case ARPHRD_FRAD:
+			if (skb->dev->type != ARPHRD_DLCI)
+			{
+				netdev_warn(dev, "Non DLCI device, type %i, tried to send on FRAD module\n",
+					    skb->dev->type);
+				accept = 0;
+			}
+			break;
+		default:
+			netdev_warn(dev, "unknown firmware type 0x%04X\n",
+				    dev->type);
+			accept = 0;
+			break;
+	}
+	if (accept)
+	{
+		/* this is frame specific, but till there's a PPP module, it's the default */
+		switch (flp->type)
+		{
+			case SDLA_S502A:
+			case SDLA_S502E:
+				ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
+				break;
+				case SDLA_S508:
+				size = sizeof(addr);
+				ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
+				if (ret == SDLA_RET_OK)
+				{
+
+					spin_lock_irqsave(&sdla_lock, flags);
+					SDLA_WINDOW(dev, addr);
+					pbuf = (void *)(dev->mem_start + (addr & SDLA_ADDR_MASK));
+					__sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
+					SDLA_WINDOW(dev, addr);
+					pbuf->opp_flag = 1;
+					spin_unlock_irqrestore(&sdla_lock, flags);
+				}
+				break;
+		}
+
+		switch (ret)
+		{
+			case SDLA_RET_OK:
+				dev->stats.tx_packets++;
+				break;
+
+			case SDLA_RET_CIR_OVERFLOW:
+			case SDLA_RET_BUF_OVERSIZE:
+			case SDLA_RET_NO_BUFS:
+				dev->stats.tx_dropped++;
+				break;
+
+			default:
+				dev->stats.tx_errors++;
+				break;
+		}
+	}
+	netif_wake_queue(dev);
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+	{
+		if(flp->master[i]!=NULL)
+			netif_wake_queue(flp->master[i]);
+	}		
+
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+static void sdla_receive(struct net_device *dev)
+{
+	struct net_device	  *master;
+	struct frad_local *flp;
+	struct dlci_local *dlp;
+	struct sk_buff	 *skb;
+
+	struct sdla_cmd	*cmd;
+	struct buf_info	*pbufi;
+	struct buf_entry  *pbuf;
+
+	unsigned long	  flags;
+	int               i=0, received, success, addr, buf_base, buf_top;
+	short             dlci, len, len2, split;
+
+	flp = netdev_priv(dev);
+	success = 1;
+	received = addr = buf_top = buf_base = 0;
+	len = dlci = 0;
+	skb = NULL;
+	master = NULL;
+	cmd = NULL;
+	pbufi = NULL;
+	pbuf = NULL;
+
+	spin_lock_irqsave(&sdla_lock, flags);
+
+	switch (flp->type)
+	{
+		case SDLA_S502A:
+		case SDLA_S502E:
+			cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
+			SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
+			success = cmd->opp_flag;
+			if (!success)
+				break;
+
+			dlci = cmd->dlci;
+			len = cmd->length;
+			break;
+
+		case SDLA_S508:
+			pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
+			SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
+			pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
+			success = pbuf->opp_flag;
+			if (!success)
+				break;
+
+			buf_top = pbufi->buf_top;
+			buf_base = pbufi->buf_base;
+			dlci = pbuf->dlci;
+			len = pbuf->length;
+			addr = pbuf->buf_addr;
+			break;
+	}
+
+	/* common code, find the DLCI and get the SKB */
+	if (success)
+	{
+		for (i=0;i<CONFIG_DLCI_MAX;i++)
+			if (flp->dlci[i] == dlci)
+				break;
+
+		if (i == CONFIG_DLCI_MAX)
+		{
+			netdev_notice(dev, "Received packet from invalid DLCI %i, ignoring\n",
+				      dlci);
+			dev->stats.rx_errors++;
+			success = 0;
+		}
+	}
+
+	if (success)
+	{
+		master = flp->master[i];
+		skb = dev_alloc_skb(len + sizeof(struct frhdr));
+		if (skb == NULL) 
+		{
+			netdev_notice(dev, "Memory squeeze, dropping packet\n");
+			dev->stats.rx_dropped++;
+			success = 0;
+		}
+		else
+			skb_reserve(skb, sizeof(struct frhdr));
+	}
+
+	/* pick up the data */
+	switch (flp->type)
+	{
+		case SDLA_S502A:
+		case SDLA_S502E:
+			if (success)
+				__sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
+
+			SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
+			cmd->opp_flag = 0;
+			break;
+
+		case SDLA_S508:
+			if (success)
+			{
+				/* is this buffer split off the end of the internal ring buffer */
+				split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
+				len2 = len - split;
+
+				__sdla_read(dev, addr, skb_put(skb, len2), len2);
+				if (split)
+					__sdla_read(dev, buf_base, skb_put(skb, split), split);
+			}
+
+			/* increment the buffer we're looking at */
+			SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
+			flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
+			pbuf->opp_flag = 0;
+			break;
+	}
+
+	if (success)
+	{
+		dev->stats.rx_packets++;
+		dlp = netdev_priv(master);
+		(*dlp->receive)(skb, master);
+	}
+
+	spin_unlock_irqrestore(&sdla_lock, flags);
+}
+
+static irqreturn_t sdla_isr(int dummy, void *dev_id)
+{
+	struct net_device     *dev;
+	struct frad_local *flp;
+	char              byte;
+
+	dev = dev_id;
+
+	flp = netdev_priv(dev);
+
+	if (!flp->initialized)
+	{
+		netdev_warn(dev, "irq %d for uninitialized device\n", dev->irq);
+		return IRQ_NONE;
+	}
+
+	byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
+	switch (byte)
+	{
+		case SDLA_INTR_RX:
+			sdla_receive(dev);
+			break;
+
+		/* the command will get an error return, which is processed above */
+		case SDLA_INTR_MODEM:
+		case SDLA_INTR_STATUS:
+			sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
+			break;
+
+		case SDLA_INTR_TX:
+		case SDLA_INTR_COMPLETE:
+		case SDLA_INTR_TIMER:
+			netdev_warn(dev, "invalid irq flag 0x%02X\n", byte);
+			break;
+	}
+
+	/* the S502E requires a manual acknowledgement of the interrupt */ 
+	if (flp->type == SDLA_S502E)
+	{
+		flp->state &= ~SDLA_S502E_INTACK;
+		outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+		flp->state |= SDLA_S502E_INTACK;
+		outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+	}
+
+	/* this clears the byte, informing the Z80 we're done */
+	byte = 0;
+	sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
+	return IRQ_HANDLED;
+}
+
+static void sdla_poll(struct timer_list *t)
+{
+	struct frad_local *flp = from_timer(flp, t, timer);
+	struct net_device *dev = flp->dev;
+
+	if (sdla_byte(dev, SDLA_502_RCV_BUF))
+		sdla_receive(dev);
+
+	flp->timer.expires = 1;
+	add_timer(&flp->timer);
+}
+
+static int sdla_close(struct net_device *dev)
+{
+	struct frad_local *flp;
+	struct intr_info  intr;
+	int               len, i;
+	short             dlcis[CONFIG_DLCI_MAX];
+
+	flp = netdev_priv(dev);
+
+	len = 0;
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->dlci[i])
+			dlcis[len++] = abs(flp->dlci[i]);
+	len *= 2;
+
+	if (flp->config.station == FRAD_STATION_NODE)
+	{
+		for(i=0;i<CONFIG_DLCI_MAX;i++)
+			if (flp->dlci[i] > 0) 
+				sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
+		sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
+	}
+
+	memset(&intr, 0, sizeof(intr));
+	/* let's start up the reception */
+	switch(flp->type)
+	{
+		case SDLA_S502A:
+			del_timer(&flp->timer); 
+			break;
+
+		case SDLA_S502E:
+			sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
+			flp->state &= ~SDLA_S502E_INTACK;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+
+		case SDLA_S507:
+			break;
+
+		case SDLA_S508:
+			sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
+			flp->state &= ~SDLA_S508_INTEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			break;
+	}
+
+	sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
+
+	netif_stop_queue(dev);
+	
+	return 0;
+}
+
+struct conf_data {
+	struct frad_conf config;
+	short            dlci[CONFIG_DLCI_MAX];
+};
+
+static int sdla_open(struct net_device *dev)
+{
+	struct frad_local *flp;
+	struct dlci_local *dlp;
+	struct conf_data  data;
+	struct intr_info  intr;
+	int               len, i;
+	char              byte;
+
+	flp = netdev_priv(dev);
+
+	if (!flp->initialized)
+		return -EPERM;
+
+	if (!flp->configured)
+		return -EPERM;
+
+	/* time to send in the configuration */
+	len = 0;
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->dlci[i])
+			data.dlci[len++] = abs(flp->dlci[i]);
+	len *= 2;
+
+	memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
+	len += sizeof(struct frad_conf);
+
+	sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
+	sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
+
+	if (flp->type == SDLA_S508)
+		flp->buffer = 0;
+
+	sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
+
+	/* let's start up the reception */
+	memset(&intr, 0, sizeof(intr));
+	switch(flp->type)
+	{
+		case SDLA_S502A:
+			flp->timer.expires = 1;
+			add_timer(&flp->timer);
+			break;
+
+		case SDLA_S502E:
+			flp->state |= SDLA_S502E_ENABLE;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			flp->state |= SDLA_S502E_INTACK;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			byte = 0;
+			sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
+			intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
+			sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
+			break;
+
+		case SDLA_S507:
+			break;
+
+		case SDLA_S508:
+			flp->state |= SDLA_S508_INTEN;
+			outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
+			byte = 0;
+			sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
+			intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
+			intr.irq = dev->irq;
+			sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
+			break;
+	}
+
+	if (flp->config.station == FRAD_STATION_CPE)
+	{
+		byte = SDLA_ICS_STATUS_ENQ;
+		sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
+	}
+	else
+	{
+		sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
+		for(i=0;i<CONFIG_DLCI_MAX;i++)
+			if (flp->dlci[i] > 0)
+				sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
+	}
+
+	/* configure any specific DLCI settings */
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->dlci[i])
+		{
+			dlp = netdev_priv(flp->master[i]);
+			if (dlp->configured)
+				sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
+		}
+
+	netif_start_queue(dev);
+	
+	return 0;
+}
+
+static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
+{
+	struct frad_local *flp;
+	struct conf_data  data;
+	int               i;
+	short             size;
+
+	if (dev->type == 0xFFFF)
+		return -EUNATCH;
+
+	flp = netdev_priv(dev);
+
+	if (!get)
+	{
+		if (netif_running(dev))
+			return -EBUSY;
+
+		if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
+			return -EFAULT;
+
+		if (data.config.station & ~FRAD_STATION_NODE)
+			return -EINVAL;
+
+		if (data.config.flags & ~FRAD_VALID_FLAGS)
+			return -EINVAL;
+
+		if ((data.config.kbaud < 0) || 
+			 ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
+			return -EINVAL;
+
+		if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
+			return -EINVAL;
+
+		if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
+			return -EINVAL;
+
+		if ((data.config.T391 < 5) || (data.config.T391 > 30))
+			return -EINVAL;
+
+		if ((data.config.T392 < 5) || (data.config.T392 > 30))
+			return -EINVAL;
+
+		if ((data.config.N391 < 1) || (data.config.N391 > 255))
+			return -EINVAL;
+
+		if ((data.config.N392 < 1) || (data.config.N392 > 10))
+			return -EINVAL;
+
+		if ((data.config.N393 < 1) || (data.config.N393 > 10))
+			return -EINVAL;
+
+		memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
+		flp->config.flags |= SDLA_DIRECT_RECV;
+
+		if (flp->type == SDLA_S508)
+			flp->config.flags |= SDLA_TX70_RX30;
+
+		if (dev->mtu != flp->config.mtu)
+		{
+			/* this is required to change the MTU */
+			dev->mtu = flp->config.mtu;
+			for(i=0;i<CONFIG_DLCI_MAX;i++)
+				if (flp->master[i])
+					flp->master[i]->mtu = flp->config.mtu;
+		}
+
+		flp->config.mtu += sizeof(struct frhdr);
+
+		/* off to the races! */
+		if (!flp->configured)
+			sdla_start(dev);
+
+		flp->configured = 1;
+	}
+	else
+	{
+		/* no sense reading if the CPU isn't started */
+		if (netif_running(dev))
+		{
+			size = sizeof(data);
+			if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
+				return -EIO;
+		}
+		else
+			if (flp->configured)
+				memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
+			else
+				memset(&data.config, 0, sizeof(struct frad_conf));
+
+		memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
+		data.config.flags &= FRAD_VALID_FLAGS;
+		data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
+		return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
+	}
+
+	return 0;
+}
+
+static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
+{
+	struct sdla_mem mem;
+	char	*temp;
+
+	if(copy_from_user(&mem, info, sizeof(mem)))
+		return -EFAULT;
+		
+	if (read)
+	{	
+		temp = kzalloc(mem.len, GFP_KERNEL);
+		if (!temp)
+			return -ENOMEM;
+		sdla_read(dev, mem.addr, temp, mem.len);
+		if(copy_to_user(mem.data, temp, mem.len))
+		{
+			kfree(temp);
+			return -EFAULT;
+		}
+		kfree(temp);
+	}
+	else
+	{
+		temp = memdup_user(mem.data, mem.len);
+		if (IS_ERR(temp))
+			return PTR_ERR(temp);
+		sdla_write(dev, mem.addr, temp, mem.len);
+		kfree(temp);
+	}
+	return 0;
+}
+
+static int sdla_reconfig(struct net_device *dev)
+{
+	struct frad_local *flp;
+	struct conf_data  data;
+	int               i, len;
+
+	flp = netdev_priv(dev);
+
+	len = 0;
+	for(i=0;i<CONFIG_DLCI_MAX;i++)
+		if (flp->dlci[i])
+			data.dlci[len++] = flp->dlci[i];
+	len *= 2;
+
+	memcpy(&data, &flp->config, sizeof(struct frad_conf));
+	len += sizeof(struct frad_conf);
+
+	sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
+	sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
+	sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
+
+	return 0;
+}
+
+static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	struct frad_local *flp;
+
+	if(!capable(CAP_NET_ADMIN))
+		return -EPERM;
+		
+	flp = netdev_priv(dev);
+
+	if (!flp->initialized)
+		return -EINVAL;
+
+	switch (cmd)
+	{
+		case FRAD_GET_CONF:
+		case FRAD_SET_CONF:
+			return sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF);
+
+		case SDLA_IDENTIFY:
+			ifr->ifr_flags = flp->type;
+			break;
+
+		case SDLA_CPUSPEED:
+			return sdla_cpuspeed(dev, ifr);
+
+/* ==========================================================
+NOTE:  This is rather a useless action right now, as the
+       current driver does not support protocols other than
+       FR.  However, Sangoma has modules for a number of
+       other protocols in the works.
+============================================================*/
+		case SDLA_PROTOCOL:
+			if (flp->configured)
+				return -EALREADY;
+
+			switch (ifr->ifr_flags)
+			{
+				case ARPHRD_FRAD:
+					dev->type = ifr->ifr_flags;
+					break;
+				default:
+					return -ENOPROTOOPT;
+			}
+			break;
+
+		case SDLA_CLEARMEM:
+			sdla_clear(dev);
+			break;
+
+		case SDLA_WRITEMEM:
+		case SDLA_READMEM:
+			if(!capable(CAP_SYS_RAWIO))
+				return -EPERM;
+			return sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM);
+
+		case SDLA_START:
+			sdla_start(dev);
+			break;
+
+		case SDLA_STOP:
+			sdla_stop(dev);
+			break;
+
+		default:
+			return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+static int sdla_change_mtu(struct net_device *dev, int new_mtu)
+{
+	if (netif_running(dev))
+		return -EBUSY;
+
+	/* for now, you can't change the MTU! */
+	return -EOPNOTSUPP;
+}
+
+static int sdla_set_config(struct net_device *dev, struct ifmap *map)
+{
+	struct frad_local *flp;
+	int               i;
+	char              byte;
+	unsigned base;
+	int err = -EINVAL;
+
+	flp = netdev_priv(dev);
+
+	if (flp->initialized)
+		return -EINVAL;
+
+	for(i=0; i < ARRAY_SIZE(valid_port); i++)
+		if (valid_port[i] == map->base_addr)
+			break;   
+
+	if (i == ARRAY_SIZE(valid_port))
+		return -EINVAL;
+
+	if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
+		pr_warn("io-port 0x%04lx in use\n", dev->base_addr);
+		return -EINVAL;
+	}
+	base = map->base_addr;
+
+	/* test for card types, S502A, S502E, S507, S508                 */
+	/* these tests shut down the card completely, so clear the state */
+	flp->type = SDLA_UNKNOWN;
+	flp->state = 0;
+   
+	for(i=1;i<SDLA_IO_EXTENTS;i++)
+		if (inb(base + i) != 0xFF)
+			break;
+
+	if (i == SDLA_IO_EXTENTS) {   
+		outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
+		if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
+			outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
+			if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
+				outb(SDLA_HALT, base + SDLA_REG_CONTROL);
+				flp->type = SDLA_S502E;
+				goto got_type;
+			}
+		}
+	}
+
+	for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
+		if (inb(base + i) != byte)
+			break;
+
+	if (i == SDLA_IO_EXTENTS) {
+		outb(SDLA_HALT, base + SDLA_REG_CONTROL);
+		if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
+			outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
+			if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
+				outb(SDLA_HALT, base + SDLA_REG_CONTROL);
+				flp->type = SDLA_S507;
+				goto got_type;
+			}
+		}
+	}
+
+	outb(SDLA_HALT, base + SDLA_REG_CONTROL);
+	if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
+		outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
+		if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
+			outb(SDLA_HALT, base + SDLA_REG_CONTROL);
+			flp->type = SDLA_S508;
+			goto got_type;
+		}
+	}
+
+	outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
+	if (inb(base + SDLA_S502_STS) == 0x40) {
+		outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
+		if (inb(base + SDLA_S502_STS) == 0x40) {
+			outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
+			if (inb(base + SDLA_S502_STS) == 0x44) {
+				outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
+				flp->type = SDLA_S502A;
+				goto got_type;
+			}
+		}
+	}
+
+	netdev_notice(dev, "Unknown card type\n");
+	err = -ENODEV;
+	goto fail;
+
+got_type:
+	switch(base) {
+		case 0x270:
+		case 0x280:
+		case 0x380: 
+		case 0x390:
+			if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
+				goto fail;
+	}
+
+	switch (map->irq) {
+		case 2:
+			if (flp->type != SDLA_S502E)
+				goto fail;
+			break;
+
+		case 10:
+		case 11:
+		case 12:
+		case 15:
+		case 4:
+			if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
+				goto fail;
+			break;
+		case 3:
+		case 5:
+		case 7:
+			if (flp->type == SDLA_S502A)
+				goto fail;
+			break;
+
+		default:
+			goto fail;
+	}
+
+	err = -EAGAIN;
+	if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev)) 
+		goto fail;
+
+	if (flp->type == SDLA_S507) {
+		switch(dev->irq) {
+			case 3:
+				flp->state = SDLA_S507_IRQ3;
+				break;
+			case 4:
+				flp->state = SDLA_S507_IRQ4;
+				break;
+			case 5:
+				flp->state = SDLA_S507_IRQ5;
+				break;
+			case 7:
+				flp->state = SDLA_S507_IRQ7;
+				break;
+			case 10:
+				flp->state = SDLA_S507_IRQ10;
+				break;
+			case 11:
+				flp->state = SDLA_S507_IRQ11;
+				break;
+			case 12:
+				flp->state = SDLA_S507_IRQ12;
+				break;
+			case 15:
+				flp->state = SDLA_S507_IRQ15;
+				break;
+		}
+	}
+
+	for(i=0; i < ARRAY_SIZE(valid_mem); i++)
+		if (valid_mem[i] == map->mem_start)
+			break;   
+
+	err = -EINVAL;
+	if (i == ARRAY_SIZE(valid_mem))
+		goto fail2;
+
+	if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
+		goto fail2;
+
+	if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
+		goto fail2;
+
+	if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
+		goto fail2;
+
+	byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
+	byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
+	switch(flp->type) {
+		case SDLA_S502A:
+		case SDLA_S502E:
+			switch (map->mem_start >> 16) {
+				case 0x0A:
+					byte |= SDLA_S502_SEG_A;
+					break;
+				case 0x0C:
+					byte |= SDLA_S502_SEG_C;
+					break;
+				case 0x0D:
+					byte |= SDLA_S502_SEG_D;
+					break;
+				case 0x0E:
+					byte |= SDLA_S502_SEG_E;
+					break;
+			}
+			break;
+		case SDLA_S507:
+			switch (map->mem_start >> 16) {
+				case 0x0A:
+					byte |= SDLA_S507_SEG_A;
+					break;
+				case 0x0B:
+					byte |= SDLA_S507_SEG_B;
+					break;
+				case 0x0C:
+					byte |= SDLA_S507_SEG_C;
+					break;
+				case 0x0E:
+					byte |= SDLA_S507_SEG_E;
+					break;
+			}
+			break;
+		case SDLA_S508:
+			switch (map->mem_start >> 16) {
+				case 0x0A:
+					byte |= SDLA_S508_SEG_A;
+					break;
+				case 0x0C:
+					byte |= SDLA_S508_SEG_C;
+					break;
+				case 0x0D:
+					byte |= SDLA_S508_SEG_D;
+					break;
+				case 0x0E:
+					byte |= SDLA_S508_SEG_E;
+					break;
+			}
+			break;
+	}
+
+	/* set the memory bits, and enable access */
+	outb(byte, base + SDLA_REG_PC_WINDOW);
+
+	switch(flp->type)
+	{
+		case SDLA_S502E:
+			flp->state = SDLA_S502E_ENABLE;
+			break;
+		case SDLA_S507:
+			flp->state |= SDLA_MEMEN;
+			break;
+		case SDLA_S508:
+			flp->state = SDLA_MEMEN;
+			break;
+	}
+	outb(flp->state, base + SDLA_REG_CONTROL);
+
+	dev->irq = map->irq;
+	dev->base_addr = base;
+	dev->mem_start = map->mem_start;
+	dev->mem_end = dev->mem_start + 0x2000;
+	flp->initialized = 1;
+	return 0;
+
+fail2:
+	free_irq(map->irq, dev);
+fail:
+	release_region(base, SDLA_IO_EXTENTS);
+	return err;
+}
+ 
+static const struct net_device_ops sdla_netdev_ops = {
+	.ndo_open	= sdla_open,
+	.ndo_stop	= sdla_close,
+	.ndo_do_ioctl	= sdla_ioctl,
+	.ndo_set_config	= sdla_set_config,
+	.ndo_start_xmit	= sdla_transmit,
+	.ndo_change_mtu	= sdla_change_mtu,
+};
+
+static void setup_sdla(struct net_device *dev)
+{
+	struct frad_local *flp = netdev_priv(dev);
+
+	netdev_boot_setup_check(dev);
+
+	dev->netdev_ops		= &sdla_netdev_ops;
+	dev->flags		= 0;
+	dev->type		= 0xFFFF;
+	dev->hard_header_len	= 0;
+	dev->addr_len		= 0;
+	dev->mtu		= SDLA_MAX_MTU;
+
+	flp->activate		= sdla_activate;
+	flp->deactivate		= sdla_deactivate;
+	flp->assoc		= sdla_assoc;
+	flp->deassoc		= sdla_deassoc;
+	flp->dlci_conf		= sdla_dlci_conf;
+	flp->dev		= dev;
+
+	timer_setup(&flp->timer, sdla_poll, 0);
+	flp->timer.expires	= 1;
+}
+
+static struct net_device *sdla;
+
+static int __init init_sdla(void)
+{
+	int err;
+
+	printk("%s.\n", version);
+
+	sdla = alloc_netdev(sizeof(struct frad_local), "sdla0",
+			    NET_NAME_UNKNOWN, setup_sdla);
+	if (!sdla) 
+		return -ENOMEM;
+
+	err = register_netdev(sdla);
+	if (err) 
+		free_netdev(sdla);
+
+	return err;
+}
+
+static void __exit exit_sdla(void)
+{
+	struct frad_local *flp = netdev_priv(sdla);
+
+	unregister_netdev(sdla);
+	if (flp->initialized) {
+		free_irq(sdla->irq, sdla);
+		release_region(sdla->base_addr, SDLA_IO_EXTENTS);
+	}
+	del_timer_sync(&flp->timer);
+	free_netdev(sdla);
+}
+
+MODULE_LICENSE("GPL");
+
+module_init(init_sdla);
+module_exit(exit_sdla);