drivers/isdn/act2000/module.c - linux - Git at Google

 /* $Id: module.c,v 1.14.6.4 2001/09/23 22:24:32 kai Exp $
  *
  * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000.
  *
  * Author       Fritz Elfert
  * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
  *
  * This software may be used and distributed according to the terms
  * of the GNU General Public License, incorporated herein by reference.
  *
  * Thanks to Friedemann Baitinger and IBM Germany
  *
  */

 #include "act2000.h"
 #include "act2000_isa.h"
 #include "capi.h"
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>

 static unsigned short act2000_isa_ports[] =
 {
 	0x0200, 0x0240, 0x0280, 0x02c0, 0x0300, 0x0340, 0x0380,
 	0xcfe0, 0xcfa0, 0xcf60, 0xcf20, 0xcee0, 0xcea0, 0xce60,
 };

 static act2000_card *cards = (act2000_card *) NULL;

 /* Parameters to be set by insmod */
 static int   act_bus  =  0;
 static int   act_port = -1;  /* -1 = Autoprobe  */
 static int   act_irq  = -1;
 static char *act_id   = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

 MODULE_DESCRIPTION("ISDN4Linux: Driver for IBM Active 2000 ISDN card");
 MODULE_AUTHOR("Fritz Elfert");
 MODULE_LICENSE("GPL");
 MODULE_PARM_DESC(act_bus, "BusType of first card, 1=ISA, 2=MCA, 3=PCMCIA, currently only ISA");
 MODULE_PARM_DESC(act_port, "Base port address of first card");
 MODULE_PARM_DESC(act_irq, "IRQ of first card");
 MODULE_PARM_DESC(act_id, "ID-String of first card");
 module_param(act_bus, int, 0);
 module_param(act_port, int, 0);
 module_param(act_irq, int, 0);
 module_param(act_id, charp, 0);

 static int act2000_addcard(int, int, int, char *);

 static act2000_chan *
 find_channel(act2000_card *card, int channel)
 {
 	if ((channel >= 0) && (channel < ACT2000_BCH))
 		return &(card->bch[channel]);
 	printk(KERN_WARNING "act2000: Invalid channel %d\n", channel);
 	return NULL;
 }

 /*
  * Free MSN list
  */
 static void
 act2000_clear_msn(act2000_card *card)
 {
 	struct msn_entry *p = card->msn_list;
 	struct msn_entry *q;
 	unsigned long flags;

 	spin_lock_irqsave(&card->lock, flags);
 	card->msn_list = NULL;
 	spin_unlock_irqrestore(&card->lock, flags);
 	while (p) {
 		q  = p->next;
 		kfree(p);
 		p = q;
 	}
 }

 /*
  * Find an MSN entry in the list.
  * If ia5 != 0, return IA5-encoded EAZ, else
  * return a bitmask with corresponding bit set.
  */
 static __u16
 act2000_find_msn(act2000_card *card, char *msn, int ia5)
 {
 	struct msn_entry *p = card->msn_list;
 	__u8 eaz = '0';

 	while (p) {
 		if (!strcmp(p->msn, msn)) {
 			eaz = p->eaz;
 			break;
 		}
 		p = p->next;
 	}
 	if (!ia5)
 		return (1 << (eaz - '0'));
 	else
 		return eaz;
 }

 /*
  * Find an EAZ entry in the list.
  * return a string with corresponding msn.
  */
 char *
 act2000_find_eaz(act2000_card *card, char eaz)
 {
 	struct msn_entry *p = card->msn_list;

 	while (p) {
 		if (p->eaz == eaz)
 			return (p->msn);
 		p = p->next;
 	}
 	return ("\0");
 }

 /*
  * Add or delete an MSN to the MSN list
  *
  * First character of msneaz is EAZ, rest is MSN.
  * If length of eazmsn is 1, delete that entry.
  */
 static int
 act2000_set_msn(act2000_card *card, char *eazmsn)
 {
 	struct msn_entry *p = card->msn_list;
 	struct msn_entry *q = NULL;
 	unsigned long flags;
 	int i;

 	if (!strlen(eazmsn))
 		return 0;
 	if (strlen(eazmsn) > 16)
 		return -EINVAL;
 	for (i = 0; i < strlen(eazmsn); i++)
 		if (!isdigit(eazmsn[i]))
 			return -EINVAL;
 	if (strlen(eazmsn) == 1) {
 		/* Delete a single MSN */
 		while (p) {
 			if (p->eaz == eazmsn[0]) {
 				spin_lock_irqsave(&card->lock, flags);
 				if (q)
 					q->next = p->next;
 				else
 					card->msn_list = p->next;
 				spin_unlock_irqrestore(&card->lock, flags);
 				kfree(p);
 				printk(KERN_DEBUG
 				       "Mapping for EAZ %c deleted\n",
 				       eazmsn[0]);
 				return 0;
 			}
 			q = p;
 			p = p->next;
 		}
 		return 0;
 	}
 	/* Add a single MSN */
 	while (p) {
 		/* Found in list, replace MSN */
 		if (p->eaz == eazmsn[0]) {
 			spin_lock_irqsave(&card->lock, flags);
 			strcpy(p->msn, &eazmsn[1]);
 			spin_unlock_irqrestore(&card->lock, flags);
 			printk(KERN_DEBUG
 			       "Mapping for EAZ %c changed to %s\n",
 			       eazmsn[0],
 			       &eazmsn[1]);
 			return 0;
 		}
 		p = p->next;
 	}
 	/* Not found in list, add new entry */
 	p = kmalloc(sizeof(msn_entry), GFP_KERNEL);
 	if (!p)
 		return -ENOMEM;
 	p->eaz = eazmsn[0];
 	strcpy(p->msn, &eazmsn[1]);
 	p->next = card->msn_list;
 	spin_lock_irqsave(&card->lock, flags);
 	card->msn_list = p;
 	spin_unlock_irqrestore(&card->lock, flags);
 	printk(KERN_DEBUG
 	       "Mapping %c -> %s added\n",
 	       eazmsn[0],
 	       &eazmsn[1]);
 	return 0;
 }

 static void
 act2000_transmit(struct work_struct *work)
 {
 	struct act2000_card *card =
 		container_of(work, struct act2000_card, snd_tq);

 	switch (card->bus) {
 	case ACT2000_BUS_ISA:
 		act2000_isa_send(card);
 		break;
 	case ACT2000_BUS_PCMCIA:
 	case ACT2000_BUS_MCA:
 	default:
 		printk(KERN_WARNING
 		       "act2000_transmit: Illegal bustype %d\n", card->bus);
 	}
 }

 static void
 act2000_receive(struct work_struct *work)
 {
 	struct act2000_card *card =
 		container_of(work, struct act2000_card, poll_tq);

 	switch (card->bus) {
 	case ACT2000_BUS_ISA:
 		act2000_isa_receive(card);
 		break;
 	case ACT2000_BUS_PCMCIA:
 	case ACT2000_BUS_MCA:
 	default:
 		printk(KERN_WARNING
 		       "act2000_receive: Illegal bustype %d\n", card->bus);
 	}
 }

 static void
 act2000_poll(unsigned long data)
 {
 	act2000_card *card = (act2000_card *)data;
 	unsigned long flags;

 	act2000_receive(&card->poll_tq);
 	spin_lock_irqsave(&card->lock, flags);
 	mod_timer(&card->ptimer, jiffies + 3);
 	spin_unlock_irqrestore(&card->lock, flags);
 }

 static int
 act2000_command(act2000_card *card, isdn_ctrl *c)
 {
 	ulong a;
 	act2000_chan *chan;
 	act2000_cdef cdef;
 	isdn_ctrl cmd;
 	char tmp[17];
 	int ret;
 	unsigned long flags;
 	void __user *arg;

 	switch (c->command) {
 	case ISDN_CMD_IOCTL:
 		memcpy(&a, c->parm.num, sizeof(ulong));
 		arg = (void __user *)a;
 		switch (c->arg) {
 		case ACT2000_IOCTL_LOADBOOT:
 			switch (card->bus) {
 			case ACT2000_BUS_ISA:
 				ret = act2000_isa_download(card,
 							   arg);
 				if (!ret) {
 					card->flags |= ACT2000_FLAGS_LOADED;
 					if (!(card->flags & ACT2000_FLAGS_IVALID)) {
 						card->ptimer.expires = jiffies + 3;
 						card->ptimer.function = act2000_poll;
 						card->ptimer.data = (unsigned long)card;
 						add_timer(&card->ptimer);
 					}
 					actcapi_manufacturer_req_errh(card);
 				}
 				break;
 			default:
 				printk(KERN_WARNING
 				       "act2000: Illegal BUS type %d\n",
 				       card->bus);
 				ret = -EIO;
 			}
 			return ret;
 		case ACT2000_IOCTL_SETPROTO:
 			card->ptype = a ? ISDN_PTYPE_EURO : ISDN_PTYPE_1TR6;
 			if (!(card->flags & ACT2000_FLAGS_RUNNING))
 				return 0;
 			actcapi_manufacturer_req_net(card);
 			return 0;
 		case ACT2000_IOCTL_SETMSN:
 			if (copy_from_user(tmp, arg,
 					   sizeof(tmp)))
 				return -EFAULT;
 			if ((ret = act2000_set_msn(card, tmp)))
 				return ret;
 			if (card->flags & ACT2000_FLAGS_RUNNING)
 				return (actcapi_manufacturer_req_msn(card));
 			return 0;
 		case ACT2000_IOCTL_ADDCARD:
 			if (copy_from_user(&cdef, arg,
 					   sizeof(cdef)))
 				return -EFAULT;
 			if (act2000_addcard(cdef.bus, cdef.port, cdef.irq, cdef.id))
 				return -EIO;
 			return 0;
 		case ACT2000_IOCTL_TEST:
 			if (!(card->flags & ACT2000_FLAGS_RUNNING))
 				return -ENODEV;
 			return 0;
 		default:
 			return -EINVAL;
 		}
 		break;
 	case ISDN_CMD_DIAL:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		spin_lock_irqsave(&card->lock, flags);
 		if (chan->fsm_state != ACT2000_STATE_NULL) {
 			spin_unlock_irqrestore(&card->lock, flags);
 			printk(KERN_WARNING "Dial on channel with state %d\n",
 			       chan->fsm_state);
 			return -EBUSY;
 		}
 		if (card->ptype == ISDN_PTYPE_EURO)
 			tmp[0] = act2000_find_msn(card, c->parm.setup.eazmsn, 1);
 		else
 			tmp[0] = c->parm.setup.eazmsn[0];
 		chan->fsm_state = ACT2000_STATE_OCALL;
 		chan->callref = 0xffff;
 		spin_unlock_irqrestore(&card->lock, flags);
 		ret = actcapi_connect_req(card, chan, c->parm.setup.phone,
 					  tmp[0], c->parm.setup.si1,
 					  c->parm.setup.si2);
 		if (ret) {
 			cmd.driver = card->myid;
 			cmd.command = ISDN_STAT_DHUP;
 			cmd.arg &= 0x0f;
 			card->interface.statcallb(&cmd);
 		}
 		return ret;
 	case ISDN_CMD_ACCEPTD:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		if (chan->fsm_state == ACT2000_STATE_ICALL)
 			actcapi_select_b2_protocol_req(card, chan);
 		return 0;
 	case ISDN_CMD_ACCEPTB:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		return 0;
 	case ISDN_CMD_HANGUP:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		switch (chan->fsm_state) {
 		case ACT2000_STATE_ICALL:
 		case ACT2000_STATE_BSETUP:
 			actcapi_connect_resp(card, chan, 0x15);
 			break;
 		case ACT2000_STATE_ACTIVE:
 			actcapi_disconnect_b3_req(card, chan);
 			break;
 		}
 		return 0;
 	case ISDN_CMD_SETEAZ:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		if (strlen(c->parm.num)) {
 			if (card->ptype == ISDN_PTYPE_EURO) {
 				chan->eazmask = act2000_find_msn(card, c->parm.num, 0);
 			}
 			if (card->ptype == ISDN_PTYPE_1TR6) {
 				int i;
 				chan->eazmask = 0;
 				for (i = 0; i < strlen(c->parm.num); i++)
 					if (isdigit(c->parm.num[i]))
 						chan->eazmask |= (1 << (c->parm.num[i] - '0'));
 			}
 		} else
 			chan->eazmask = 0x3ff;
 		actcapi_listen_req(card);
 		return 0;
 	case ISDN_CMD_CLREAZ:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		chan->eazmask = 0;
 		actcapi_listen_req(card);
 		return 0;
 	case ISDN_CMD_SETL2:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		chan->l2prot = (c->arg >> 8);
 		return 0;
 	case ISDN_CMD_SETL3:
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		if ((c->arg >> 8) != ISDN_PROTO_L3_TRANS) {
 			printk(KERN_WARNING "L3 protocol unknown\n");
 			return -1;
 		}
 		if (!(chan = find_channel(card, c->arg & 0x0f)))
 			break;
 		chan->l3prot = (c->arg >> 8);
 		return 0;
 	}

 	return -EINVAL;
 }

 static int
 act2000_sendbuf(act2000_card *card, int channel, int ack, struct sk_buff *skb)
 {
 	struct sk_buff *xmit_skb;
 	int len;
 	act2000_chan *chan;
 	actcapi_msg *msg;

 	if (!(chan = find_channel(card, channel)))
 		return -1;
 	if (chan->fsm_state != ACT2000_STATE_ACTIVE)
 		return -1;
 	len = skb->len;
 	if ((chan->queued + len) >= ACT2000_MAX_QUEUED)
 		return 0;
 	if (!len)
 		return 0;
 	if (skb_headroom(skb) < 19) {
 		printk(KERN_WARNING "act2000_sendbuf: Headroom only %d\n",
 		       skb_headroom(skb));
 		xmit_skb = alloc_skb(len + 19, GFP_ATOMIC);
 		if (!xmit_skb) {
 			printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 			return 0;
 		}
 		skb_reserve(xmit_skb, 19);
 		skb_copy_from_linear_data(skb, skb_put(xmit_skb, len), len);
 	} else {
 		xmit_skb = skb_clone(skb, GFP_ATOMIC);
 		if (!xmit_skb) {
 			printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 			return 0;
 		}
 	}
 	dev_kfree_skb(skb);
 	msg = (actcapi_msg *)skb_push(xmit_skb, 19);
 	msg->hdr.len = 19 + len;
 	msg->hdr.applicationID = 1;
 	msg->hdr.cmd.cmd = 0x86;
 	msg->hdr.cmd.subcmd = 0x00;
 	msg->hdr.msgnum = actcapi_nextsmsg(card);
 	msg->msg.data_b3_req.datalen = len;
 	msg->msg.data_b3_req.blocknr = (msg->hdr.msgnum & 0xff);
 	msg->msg.data_b3_req.fakencci = MAKE_NCCI(chan->plci, 0, chan->ncci);
 	msg->msg.data_b3_req.flags = ack; /* Will be set to 0 on actual sending */
 	actcapi_debug_msg(xmit_skb, 1);
 	chan->queued += len;
 	skb_queue_tail(&card->sndq, xmit_skb);
 	act2000_schedule_tx(card);
 	return len;
 }


 /* Read the Status-replies from the Interface */
 static int
 act2000_readstatus(u_char __user *buf, int len, act2000_card *card)
 {
 	int count;
 	u_char __user *p;

 	for (p = buf, count = 0; count < len; p++, count++) {
 		if (card->status_buf_read == card->status_buf_write)
 			return count;
 		put_user(*card->status_buf_read++, p);
 		if (card->status_buf_read > card->status_buf_end)
 			card->status_buf_read = card->status_buf;
 	}
 	return count;
 }

 /*
  * Find card with given driverId
  */
 static inline act2000_card *
 act2000_findcard(int driverid)
 {
 	act2000_card *p = cards;

 	while (p) {
 		if (p->myid == driverid)
 			return p;
 		p = p->next;
 	}
 	return (act2000_card *) 0;
 }

 /*
  * Wrapper functions for interface to linklevel
  */
 static int
 if_command(isdn_ctrl *c)
 {
 	act2000_card *card = act2000_findcard(c->driver);

 	if (card)
 		return (act2000_command(card, c));
 	printk(KERN_ERR
 	       "act2000: if_command %d called with invalid driverId %d!\n",
 	       c->command, c->driver);
 	return -ENODEV;
 }

 static int
 if_writecmd(const u_char __user *buf, int len, int id, int channel)
 {
 	act2000_card *card = act2000_findcard(id);

 	if (card) {
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		return (len);
 	}
 	printk(KERN_ERR
 	       "act2000: if_writecmd called with invalid driverId!\n");
 	return -ENODEV;
 }

 static int
 if_readstatus(u_char __user *buf, int len, int id, int channel)
 {
 	act2000_card *card = act2000_findcard(id);

 	if (card) {
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		return (act2000_readstatus(buf, len, card));
 	}
 	printk(KERN_ERR
 	       "act2000: if_readstatus called with invalid driverId!\n");
 	return -ENODEV;
 }

 static int
 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
 {
 	act2000_card *card = act2000_findcard(id);

 	if (card) {
 		if (!(card->flags & ACT2000_FLAGS_RUNNING))
 			return -ENODEV;
 		return (act2000_sendbuf(card, channel, ack, skb));
 	}
 	printk(KERN_ERR
 	       "act2000: if_sendbuf called with invalid driverId!\n");
 	return -ENODEV;
 }


 /*
  * Allocate a new card-struct, initialize it
  * link it into cards-list.
  */
 static void
 act2000_alloccard(int bus, int port, int irq, char *id)
 {
 	int i;
 	act2000_card *card;
 	if (!(card = kzalloc(sizeof(act2000_card), GFP_KERNEL))) {
 		printk(KERN_WARNING
 		       "act2000: (%s) Could not allocate card-struct.\n", id);
 		return;
 	}
 	spin_lock_init(&card->lock);
 	spin_lock_init(&card->mnlock);
 	skb_queue_head_init(&card->sndq);
 	skb_queue_head_init(&card->rcvq);
 	skb_queue_head_init(&card->ackq);
 	INIT_WORK(&card->snd_tq, act2000_transmit);
 	INIT_WORK(&card->rcv_tq, actcapi_dispatch);
 	INIT_WORK(&card->poll_tq, act2000_receive);
 	init_timer(&card->ptimer);
 	card->interface.owner = THIS_MODULE;
 	card->interface.channels = ACT2000_BCH;
 	card->interface.maxbufsize = 4000;
 	card->interface.command = if_command;
 	card->interface.writebuf_skb = if_sendbuf;
 	card->interface.writecmd = if_writecmd;
 	card->interface.readstat = if_readstatus;
 	card->interface.features =
 		ISDN_FEATURE_L2_X75I |
 		ISDN_FEATURE_L2_HDLC |
 		ISDN_FEATURE_L3_TRANS |
 		ISDN_FEATURE_P_UNKNOWN;
 	card->interface.hl_hdrlen = 20;
 	card->ptype = ISDN_PTYPE_EURO;
 	strlcpy(card->interface.id, id, sizeof(card->interface.id));
 	for (i = 0; i < ACT2000_BCH; i++) {
 		card->bch[i].plci = 0x8000;
 		card->bch[i].ncci = 0x8000;
 		card->bch[i].l2prot = ISDN_PROTO_L2_X75I;
 		card->bch[i].l3prot = ISDN_PROTO_L3_TRANS;
 	}
 	card->myid = -1;
 	card->bus = bus;
 	card->port = port;
 	card->irq = irq;
 	card->next = cards;
 	cards = card;
 }

 /*
  * register card at linklevel
  */
 static int
 act2000_registercard(act2000_card *card)
 {
 	switch (card->bus) {
 	case ACT2000_BUS_ISA:
 		break;
 	case ACT2000_BUS_MCA:
 	case ACT2000_BUS_PCMCIA:
 	default:
 		printk(KERN_WARNING
 		       "act2000: Illegal BUS type %d\n",
 		       card->bus);
 		return -1;
 	}
 	if (!register_isdn(&card->interface)) {
 		printk(KERN_WARNING
 		       "act2000: Unable to register %s\n",
 		       card->interface.id);
 		return -1;
 	}
 	card->myid = card->interface.channels;
 	sprintf(card->regname, "act2000-isdn (%s)", card->interface.id);
 	return 0;
 }

 static void
 unregister_card(act2000_card *card)
 {
 	isdn_ctrl cmd;

 	cmd.command = ISDN_STAT_UNLOAD;
 	cmd.driver = card->myid;
 	card->interface.statcallb(&cmd);
 	switch (card->bus) {
 	case ACT2000_BUS_ISA:
 		act2000_isa_release(card);
 		break;
 	case ACT2000_BUS_MCA:
 	case ACT2000_BUS_PCMCIA:
 	default:
 		printk(KERN_WARNING
 		       "act2000: Invalid BUS type %d\n",
 		       card->bus);
 		break;
 	}
 }

 static int
 act2000_addcard(int bus, int port, int irq, char *id)
 {
 	act2000_card *p;
 	act2000_card *q = NULL;
 	int initialized;
 	int added = 0;
 	int failed = 0;
 	int i;

 	if (!bus)
 		bus = ACT2000_BUS_ISA;
 	if (port != -1) {
 		/* Port defined, do fixed setup */
 		act2000_alloccard(bus, port, irq, id);
 	} else {
 		/* No port defined, perform autoprobing.
 		 * This may result in more than one card detected.
 		 */
 		switch (bus) {
 		case ACT2000_BUS_ISA:
 			for (i = 0; i < ARRAY_SIZE(act2000_isa_ports); i++)
 				if (act2000_isa_detect(act2000_isa_ports[i])) {
 					printk(KERN_INFO "act2000: Detected "
 					       "ISA card at port 0x%x\n",
 					       act2000_isa_ports[i]);
 					act2000_alloccard(bus,
 							  act2000_isa_ports[i], irq, id);
 				}
 			break;
 		case ACT2000_BUS_MCA:
 		case ACT2000_BUS_PCMCIA:
 		default:
 			printk(KERN_WARNING
 			       "act2000: addcard: Invalid BUS type %d\n", bus);
 		}
 	}
 	if (!cards)
 		return 1;
 	p = cards;
 	while (p) {
 		initialized = 0;
 		if (!p->interface.statcallb) {
 			/* Not yet registered.
 			 * Try to register and activate it.
 			 */
 			added++;
 			switch (p->bus) {
 			case ACT2000_BUS_ISA:
 				if (act2000_isa_detect(p->port)) {
 					if (act2000_registercard(p))
 						break;
 					if (act2000_isa_config_port(p, p->port)) {
 						printk(KERN_WARNING
 						       "act2000: Could not request port 0x%04x\n",
 						       p->port);
 						unregister_card(p);
 						p->interface.statcallb = NULL;
 						break;
 					}
 					if (act2000_isa_config_irq(p, p->irq)) {
 						printk(KERN_INFO
 						       "act2000: No IRQ available, fallback to polling\n");
 						/* Fall back to polled operation */
 						p->irq = 0;
 					}
 					printk(KERN_INFO
 					       "act2000: ISA"
 					       "-type card at port "
 					       "0x%04x ",
 					       p->port);
 					if (p->irq)
 						printk("irq %d\n", p->irq);
 					else
 						printk("polled\n");
 					initialized = 1;
 				}
 				break;
 			case ACT2000_BUS_MCA:
 			case ACT2000_BUS_PCMCIA:
 			default:
 				printk(KERN_WARNING
 				       "act2000: addcard: Invalid BUS type %d\n",
 				       p->bus);
 			}
 		} else
 			/* Card already initialized */
 			initialized = 1;
 		if (initialized) {
 			/* Init OK, next card ... */
 			q = p;
 			p = p->next;
 		} else {
 			/* Init failed, remove card from list, free memory */
 			printk(KERN_WARNING
 			       "act2000: Initialization of %s failed\n",
 			       p->interface.id);
 			if (q) {
 				q->next = p->next;
 				kfree(p);
 				p = q->next;
 			} else {
 				cards = p->next;
 				kfree(p);
 				p = cards;
 			}
 			failed++;
 		}
 	}
 	return (added - failed);
 }

 #define DRIVERNAME "IBM Active 2000 ISDN driver"

 static int __init act2000_init(void)
 {
 	printk(KERN_INFO "%s\n", DRIVERNAME);
 	if (!cards)
 		act2000_addcard(act_bus, act_port, act_irq, act_id);
 	if (!cards)
 		printk(KERN_INFO "act2000: No cards defined yet\n");
 	return 0;
 }

 static void __exit act2000_exit(void)
 {
 	act2000_card *card = cards;
 	act2000_card *last;
 	while (card) {
 		unregister_card(card);
 		del_timer_sync(&card->ptimer);
 		card = card->next;
 	}
 	card = cards;
 	while (card) {
 		last = card;
 		card = card->next;
 		act2000_clear_msn(last);
 		kfree(last);
 	}
 	printk(KERN_INFO "%s unloaded\n", DRIVERNAME);
 }

 module_init(act2000_init);
 module_exit(act2000_exit);
	/* $Id: module.c,v 1.14.6.4 2001/09/23 22:24:32 kai Exp $
	*
	* ISDN lowlevel-module for the IBM ISDN-S0 Active 2000.
	*
	* Author Fritz Elfert
	* Copyright by Fritz Elfert <fritz@isdn4linux.de>
	*
	* This software may be used and distributed according to the terms
	* of the GNU General Public License, incorporated herein by reference.
	*
	* Thanks to Friedemann Baitinger and IBM Germany
	*
	*/

	#include "act2000.h"
	#include "act2000_isa.h"
	#include "capi.h"
	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/init.h>

	static unsigned short act2000_isa_ports[] =
	{
	0x0200, 0x0240, 0x0280, 0x02c0, 0x0300, 0x0340, 0x0380,
	0xcfe0, 0xcfa0, 0xcf60, 0xcf20, 0xcee0, 0xcea0, 0xce60,
	};

	static act2000_card cards = (act2000_card ) NULL;

	/* Parameters to be set by insmod */
	static int act_bus = 0;
	static int act_port = -1; /* -1 = Autoprobe */
	static int act_irq = -1;
	static char *act_id = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";

	MODULE_DESCRIPTION("ISDN4Linux: Driver for IBM Active 2000 ISDN card");
	MODULE_AUTHOR("Fritz Elfert");
	MODULE_LICENSE("GPL");
	MODULE_PARM_DESC(act_bus, "BusType of first card, 1=ISA, 2=MCA, 3=PCMCIA, currently only ISA");
	MODULE_PARM_DESC(act_port, "Base port address of first card");
	MODULE_PARM_DESC(act_irq, "IRQ of first card");
	MODULE_PARM_DESC(act_id, "ID-String of first card");
	module_param(act_bus, int, 0);
	module_param(act_port, int, 0);
	module_param(act_irq, int, 0);
	module_param(act_id, charp, 0);

	static int act2000_addcard(int, int, int, char *);

	static act2000_chan *
	find_channel(act2000_card *card, int channel)
	{
	if ((channel >= 0) && (channel < ACT2000_BCH))
	return &(card->bch[channel]);
	printk(KERN_WARNING "act2000: Invalid channel %d\n", channel);
	return NULL;
	}

	/*
	* Free MSN list
	*/
	static void
	act2000_clear_msn(act2000_card *card)
	{
	struct msn_entry *p = card->msn_list;
	struct msn_entry *q;
	unsigned long flags;

	spin_lock_irqsave(&card->lock, flags);
	card->msn_list = NULL;
	spin_unlock_irqrestore(&card->lock, flags);
	while (p) {
	q = p->next;
	kfree(p);
	p = q;
	}
	}

	/*
	* Find an MSN entry in the list.
	* If ia5 != 0, return IA5-encoded EAZ, else
	* return a bitmask with corresponding bit set.
	*/
	static __u16
	act2000_find_msn(act2000_card card, char msn, int ia5)
	{
	struct msn_entry *p = card->msn_list;
	__u8 eaz = '0';

	while (p) {
	if (!strcmp(p->msn, msn)) {
	eaz = p->eaz;
	break;
	}
	p = p->next;
	}
	if (!ia5)
	return (1 << (eaz - '0'));
	else
	return eaz;
	}

	/*
	* Find an EAZ entry in the list.
	* return a string with corresponding msn.
	*/
	char *
	act2000_find_eaz(act2000_card *card, char eaz)
	{
	struct msn_entry *p = card->msn_list;

	while (p) {
	if (p->eaz == eaz)
	return (p->msn);
	p = p->next;
	}
	return ("\0");
	}

	/*
	* Add or delete an MSN to the MSN list
	*
	* First character of msneaz is EAZ, rest is MSN.
	* If length of eazmsn is 1, delete that entry.
	*/
	static int
	act2000_set_msn(act2000_card card, char eazmsn)
	{
	struct msn_entry *p = card->msn_list;
	struct msn_entry *q = NULL;
	unsigned long flags;
	int i;

	if (!strlen(eazmsn))
	return 0;
	if (strlen(eazmsn) > 16)
	return -EINVAL;
	for (i = 0; i < strlen(eazmsn); i++)
	if (!isdigit(eazmsn[i]))
	return -EINVAL;
	if (strlen(eazmsn) == 1) {
	/* Delete a single MSN */
	while (p) {
	if (p->eaz == eazmsn[0]) {
	spin_lock_irqsave(&card->lock, flags);
	if (q)
	q->next = p->next;
	else
	card->msn_list = p->next;
	spin_unlock_irqrestore(&card->lock, flags);
	kfree(p);
	printk(KERN_DEBUG
	"Mapping for EAZ %c deleted\n",
	eazmsn[0]);
	return 0;
	}
	q = p;
	p = p->next;
	}
	return 0;
	}
	/* Add a single MSN */
	while (p) {
	/* Found in list, replace MSN */
	if (p->eaz == eazmsn[0]) {
	spin_lock_irqsave(&card->lock, flags);
	strcpy(p->msn, &eazmsn[1]);
	spin_unlock_irqrestore(&card->lock, flags);
	printk(KERN_DEBUG
	"Mapping for EAZ %c changed to %s\n",
	eazmsn[0],
	&eazmsn[1]);
	return 0;
	}
	p = p->next;
	}
	/* Not found in list, add new entry */
	p = kmalloc(sizeof(msn_entry), GFP_KERNEL);
	if (!p)
	return -ENOMEM;
	p->eaz = eazmsn[0];
	strcpy(p->msn, &eazmsn[1]);
	p->next = card->msn_list;
	spin_lock_irqsave(&card->lock, flags);
	card->msn_list = p;
	spin_unlock_irqrestore(&card->lock, flags);
	printk(KERN_DEBUG
	"Mapping %c -> %s added\n",
	eazmsn[0],
	&eazmsn[1]);
	return 0;
	}

	static void
	act2000_transmit(struct work_struct *work)
	{
	struct act2000_card *card =
	container_of(work, struct act2000_card, snd_tq);

	switch (card->bus) {
	case ACT2000_BUS_ISA:
	act2000_isa_send(card);
	break;
	case ACT2000_BUS_PCMCIA:
	case ACT2000_BUS_MCA:
	default:
	printk(KERN_WARNING
	"act2000_transmit: Illegal bustype %d\n", card->bus);
	}
	}

	static void
	act2000_receive(struct work_struct *work)
	{
	struct act2000_card *card =
	container_of(work, struct act2000_card, poll_tq);

	switch (card->bus) {
	case ACT2000_BUS_ISA:
	act2000_isa_receive(card);
	break;
	case ACT2000_BUS_PCMCIA:
	case ACT2000_BUS_MCA:
	default:
	printk(KERN_WARNING
	"act2000_receive: Illegal bustype %d\n", card->bus);
	}
	}

	static void
	act2000_poll(unsigned long data)
	{
	act2000_card card = (act2000_card )data;
	unsigned long flags;

	act2000_receive(&card->poll_tq);
	spin_lock_irqsave(&card->lock, flags);
	mod_timer(&card->ptimer, jiffies + 3);
	spin_unlock_irqrestore(&card->lock, flags);
	}

	static int
	act2000_command(act2000_card card, isdn_ctrl c)
	{
	ulong a;
	act2000_chan *chan;
	act2000_cdef cdef;
	isdn_ctrl cmd;
	char tmp[17];
	int ret;
	unsigned long flags;
	void __user *arg;

	switch (c->command) {
	case ISDN_CMD_IOCTL:
	memcpy(&a, c->parm.num, sizeof(ulong));
	arg = (void __user *)a;
	switch (c->arg) {
	case ACT2000_IOCTL_LOADBOOT:
	switch (card->bus) {
	case ACT2000_BUS_ISA:
	ret = act2000_isa_download(card,
	arg);
	if (!ret) {
	card->flags \|= ACT2000_FLAGS_LOADED;
	if (!(card->flags & ACT2000_FLAGS_IVALID)) {
	card->ptimer.expires = jiffies + 3;
	card->ptimer.function = act2000_poll;
	card->ptimer.data = (unsigned long)card;
	add_timer(&card->ptimer);
	}
	actcapi_manufacturer_req_errh(card);
	}
	break;
	default:
	printk(KERN_WARNING
	"act2000: Illegal BUS type %d\n",
	card->bus);
	ret = -EIO;
	}
	return ret;
	case ACT2000_IOCTL_SETPROTO:
	card->ptype = a ? ISDN_PTYPE_EURO : ISDN_PTYPE_1TR6;
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return 0;
	actcapi_manufacturer_req_net(card);
	return 0;
	case ACT2000_IOCTL_SETMSN:
	if (copy_from_user(tmp, arg,
	sizeof(tmp)))
	return -EFAULT;
	if ((ret = act2000_set_msn(card, tmp)))
	return ret;
	if (card->flags & ACT2000_FLAGS_RUNNING)
	return (actcapi_manufacturer_req_msn(card));
	return 0;
	case ACT2000_IOCTL_ADDCARD:
	if (copy_from_user(&cdef, arg,
	sizeof(cdef)))
	return -EFAULT;
	if (act2000_addcard(cdef.bus, cdef.port, cdef.irq, cdef.id))
	return -EIO;
	return 0;
	case ACT2000_IOCTL_TEST:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	return 0;
	default:
	return -EINVAL;
	}
	break;
	case ISDN_CMD_DIAL:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	spin_lock_irqsave(&card->lock, flags);
	if (chan->fsm_state != ACT2000_STATE_NULL) {
	spin_unlock_irqrestore(&card->lock, flags);
	printk(KERN_WARNING "Dial on channel with state %d\n",
	chan->fsm_state);
	return -EBUSY;
	}
	if (card->ptype == ISDN_PTYPE_EURO)
	tmp[0] = act2000_find_msn(card, c->parm.setup.eazmsn, 1);
	else
	tmp[0] = c->parm.setup.eazmsn[0];
	chan->fsm_state = ACT2000_STATE_OCALL;
	chan->callref = 0xffff;
	spin_unlock_irqrestore(&card->lock, flags);
	ret = actcapi_connect_req(card, chan, c->parm.setup.phone,
	tmp[0], c->parm.setup.si1,
	c->parm.setup.si2);
	if (ret) {
	cmd.driver = card->myid;
	cmd.command = ISDN_STAT_DHUP;
	cmd.arg &= 0x0f;
	card->interface.statcallb(&cmd);
	}
	return ret;
	case ISDN_CMD_ACCEPTD:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	if (chan->fsm_state == ACT2000_STATE_ICALL)
	actcapi_select_b2_protocol_req(card, chan);
	return 0;
	case ISDN_CMD_ACCEPTB:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	return 0;
	case ISDN_CMD_HANGUP:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	switch (chan->fsm_state) {
	case ACT2000_STATE_ICALL:
	case ACT2000_STATE_BSETUP:
	actcapi_connect_resp(card, chan, 0x15);
	break;
	case ACT2000_STATE_ACTIVE:
	actcapi_disconnect_b3_req(card, chan);
	break;
	}
	return 0;
	case ISDN_CMD_SETEAZ:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	if (strlen(c->parm.num)) {
	if (card->ptype == ISDN_PTYPE_EURO) {
	chan->eazmask = act2000_find_msn(card, c->parm.num, 0);
	}
	if (card->ptype == ISDN_PTYPE_1TR6) {
	int i;
	chan->eazmask = 0;
	for (i = 0; i < strlen(c->parm.num); i++)
	if (isdigit(c->parm.num[i]))
	chan->eazmask \|= (1 << (c->parm.num[i] - '0'));
	}
	} else
	chan->eazmask = 0x3ff;
	actcapi_listen_req(card);
	return 0;
	case ISDN_CMD_CLREAZ:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	chan->eazmask = 0;
	actcapi_listen_req(card);
	return 0;
	case ISDN_CMD_SETL2:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	chan->l2prot = (c->arg >> 8);
	return 0;
	case ISDN_CMD_SETL3:
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	if ((c->arg >> 8) != ISDN_PROTO_L3_TRANS) {
	printk(KERN_WARNING "L3 protocol unknown\n");
	return -1;
	}
	if (!(chan = find_channel(card, c->arg & 0x0f)))
	break;
	chan->l3prot = (c->arg >> 8);
	return 0;
	}

	return -EINVAL;
	}

	static int
	act2000_sendbuf(act2000_card card, int channel, int ack, struct sk_buff skb)
	{
	struct sk_buff *xmit_skb;
	int len;
	act2000_chan *chan;
	actcapi_msg *msg;

	if (!(chan = find_channel(card, channel)))
	return -1;
	if (chan->fsm_state != ACT2000_STATE_ACTIVE)
	return -1;
	len = skb->len;
	if ((chan->queued + len) >= ACT2000_MAX_QUEUED)
	return 0;
	if (!len)
	return 0;
	if (skb_headroom(skb) < 19) {
	printk(KERN_WARNING "act2000_sendbuf: Headroom only %d\n",
	skb_headroom(skb));
	xmit_skb = alloc_skb(len + 19, GFP_ATOMIC);
	if (!xmit_skb) {
	printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
	return 0;
	}
	skb_reserve(xmit_skb, 19);
	skb_copy_from_linear_data(skb, skb_put(xmit_skb, len), len);
	} else {
	xmit_skb = skb_clone(skb, GFP_ATOMIC);
	if (!xmit_skb) {
	printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
	return 0;
	}
	}
	dev_kfree_skb(skb);
	msg = (actcapi_msg *)skb_push(xmit_skb, 19);
	msg->hdr.len = 19 + len;
	msg->hdr.applicationID = 1;
	msg->hdr.cmd.cmd = 0x86;
	msg->hdr.cmd.subcmd = 0x00;
	msg->hdr.msgnum = actcapi_nextsmsg(card);
	msg->msg.data_b3_req.datalen = len;
	msg->msg.data_b3_req.blocknr = (msg->hdr.msgnum & 0xff);
	msg->msg.data_b3_req.fakencci = MAKE_NCCI(chan->plci, 0, chan->ncci);
	msg->msg.data_b3_req.flags = ack; /* Will be set to 0 on actual sending */
	actcapi_debug_msg(xmit_skb, 1);
	chan->queued += len;
	skb_queue_tail(&card->sndq, xmit_skb);
	act2000_schedule_tx(card);
	return len;
	}


	/* Read the Status-replies from the Interface */
	static int
	act2000_readstatus(u_char __user buf, int len, act2000_card card)
	{
	int count;
	u_char __user *p;

	for (p = buf, count = 0; count < len; p++, count++) {
	if (card->status_buf_read == card->status_buf_write)
	return count;
	put_user(*card->status_buf_read++, p);
	if (card->status_buf_read > card->status_buf_end)
	card->status_buf_read = card->status_buf;
	}
	return count;
	}

	/*
	* Find card with given driverId
	*/
	static inline act2000_card *
	act2000_findcard(int driverid)
	{
	act2000_card *p = cards;

	while (p) {
	if (p->myid == driverid)
	return p;
	p = p->next;
	}
	return (act2000_card *) 0;
	}

	/*
	* Wrapper functions for interface to linklevel
	*/
	static int
	if_command(isdn_ctrl *c)
	{
	act2000_card *card = act2000_findcard(c->driver);

	if (card)
	return (act2000_command(card, c));
	printk(KERN_ERR
	"act2000: if_command %d called with invalid driverId %d!\n",
	c->command, c->driver);
	return -ENODEV;
	}

	static int
	if_writecmd(const u_char __user *buf, int len, int id, int channel)
	{
	act2000_card *card = act2000_findcard(id);

	if (card) {
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	return (len);
	}
	printk(KERN_ERR
	"act2000: if_writecmd called with invalid driverId!\n");
	return -ENODEV;
	}

	static int
	if_readstatus(u_char __user *buf, int len, int id, int channel)
	{
	act2000_card *card = act2000_findcard(id);

	if (card) {
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	return (act2000_readstatus(buf, len, card));
	}
	printk(KERN_ERR
	"act2000: if_readstatus called with invalid driverId!\n");
	return -ENODEV;
	}

	static int
	if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
	{
	act2000_card *card = act2000_findcard(id);

	if (card) {
	if (!(card->flags & ACT2000_FLAGS_RUNNING))
	return -ENODEV;
	return (act2000_sendbuf(card, channel, ack, skb));
	}
	printk(KERN_ERR
	"act2000: if_sendbuf called with invalid driverId!\n");
	return -ENODEV;
	}


	/*
	* Allocate a new card-struct, initialize it
	* link it into cards-list.
	*/
	static void
	act2000_alloccard(int bus, int port, int irq, char *id)
	{
	int i;
	act2000_card *card;
	if (!(card = kzalloc(sizeof(act2000_card), GFP_KERNEL))) {
	printk(KERN_WARNING
	"act2000: (%s) Could not allocate card-struct.\n", id);
	return;
	}
	spin_lock_init(&card->lock);
	spin_lock_init(&card->mnlock);
	skb_queue_head_init(&card->sndq);
	skb_queue_head_init(&card->rcvq);
	skb_queue_head_init(&card->ackq);
	INIT_WORK(&card->snd_tq, act2000_transmit);
	INIT_WORK(&card->rcv_tq, actcapi_dispatch);
	INIT_WORK(&card->poll_tq, act2000_receive);
	init_timer(&card->ptimer);
	card->interface.owner = THIS_MODULE;
	card->interface.channels = ACT2000_BCH;
	card->interface.maxbufsize = 4000;
	card->interface.command = if_command;
	card->interface.writebuf_skb = if_sendbuf;
	card->interface.writecmd = if_writecmd;
	card->interface.readstat = if_readstatus;
	card->interface.features =
	ISDN_FEATURE_L2_X75I \|
	ISDN_FEATURE_L2_HDLC \|
	ISDN_FEATURE_L3_TRANS \|
	ISDN_FEATURE_P_UNKNOWN;
	card->interface.hl_hdrlen = 20;
	card->ptype = ISDN_PTYPE_EURO;
	strlcpy(card->interface.id, id, sizeof(card->interface.id));
	for (i = 0; i < ACT2000_BCH; i++) {
	card->bch[i].plci = 0x8000;
	card->bch[i].ncci = 0x8000;
	card->bch[i].l2prot = ISDN_PROTO_L2_X75I;
	card->bch[i].l3prot = ISDN_PROTO_L3_TRANS;
	}
	card->myid = -1;
	card->bus = bus;
	card->port = port;
	card->irq = irq;
	card->next = cards;
	cards = card;
	}

	/*
	* register card at linklevel
	*/
	static int
	act2000_registercard(act2000_card *card)
	{
	switch (card->bus) {
	case ACT2000_BUS_ISA:
	break;
	case ACT2000_BUS_MCA:
	case ACT2000_BUS_PCMCIA:
	default:
	printk(KERN_WARNING
	"act2000: Illegal BUS type %d\n",
	card->bus);
	return -1;
	}
	if (!register_isdn(&card->interface)) {
	printk(KERN_WARNING
	"act2000: Unable to register %s\n",
	card->interface.id);
	return -1;
	}
	card->myid = card->interface.channels;
	sprintf(card->regname, "act2000-isdn (%s)", card->interface.id);
	return 0;
	}

	static void
	unregister_card(act2000_card *card)
	{
	isdn_ctrl cmd;

	cmd.command = ISDN_STAT_UNLOAD;
	cmd.driver = card->myid;
	card->interface.statcallb(&cmd);
	switch (card->bus) {
	case ACT2000_BUS_ISA:
	act2000_isa_release(card);
	break;
	case ACT2000_BUS_MCA:
	case ACT2000_BUS_PCMCIA:
	default:
	printk(KERN_WARNING
	"act2000: Invalid BUS type %d\n",
	card->bus);
	break;
	}
	}

	static int
	act2000_addcard(int bus, int port, int irq, char *id)
	{
	act2000_card *p;
	act2000_card *q = NULL;
	int initialized;
	int added = 0;
	int failed = 0;
	int i;

	if (!bus)
	bus = ACT2000_BUS_ISA;
	if (port != -1) {
	/* Port defined, do fixed setup */
	act2000_alloccard(bus, port, irq, id);
	} else {
	/* No port defined, perform autoprobing.
	* This may result in more than one card detected.
	*/
	switch (bus) {
	case ACT2000_BUS_ISA:
	for (i = 0; i < ARRAY_SIZE(act2000_isa_ports); i++)
	if (act2000_isa_detect(act2000_isa_ports[i])) {
	printk(KERN_INFO "act2000: Detected "
	"ISA card at port 0x%x\n",
	act2000_isa_ports[i]);
	act2000_alloccard(bus,
	act2000_isa_ports[i], irq, id);
	}
	break;
	case ACT2000_BUS_MCA:
	case ACT2000_BUS_PCMCIA:
	default:
	printk(KERN_WARNING
	"act2000: addcard: Invalid BUS type %d\n", bus);
	}
	}
	if (!cards)
	return 1;
	p = cards;
	while (p) {
	initialized = 0;
	if (!p->interface.statcallb) {
	/* Not yet registered.
	* Try to register and activate it.
	*/
	added++;
	switch (p->bus) {
	case ACT2000_BUS_ISA:
	if (act2000_isa_detect(p->port)) {
	if (act2000_registercard(p))
	break;
	if (act2000_isa_config_port(p, p->port)) {
	printk(KERN_WARNING
	"act2000: Could not request port 0x%04x\n",
	p->port);
	unregister_card(p);
	p->interface.statcallb = NULL;
	break;
	}
	if (act2000_isa_config_irq(p, p->irq)) {
	printk(KERN_INFO
	"act2000: No IRQ available, fallback to polling\n");
	/* Fall back to polled operation */
	p->irq = 0;
	}
	printk(KERN_INFO
	"act2000: ISA"
	"-type card at port "
	"0x%04x ",
	p->port);
	if (p->irq)
	printk("irq %d\n", p->irq);
	else
	printk("polled\n");
	initialized = 1;
	}
	break;
	case ACT2000_BUS_MCA:
	case ACT2000_BUS_PCMCIA:
	default:
	printk(KERN_WARNING
	"act2000: addcard: Invalid BUS type %d\n",
	p->bus);
	}
	} else
	/* Card already initialized */
	initialized = 1;
	if (initialized) {
	/* Init OK, next card ... */
	q = p;
	p = p->next;
	} else {
	/* Init failed, remove card from list, free memory */
	printk(KERN_WARNING
	"act2000: Initialization of %s failed\n",
	p->interface.id);
	if (q) {
	q->next = p->next;
	kfree(p);
	p = q->next;
	} else {
	cards = p->next;
	kfree(p);
	p = cards;
	}
	failed++;
	}
	}
	return (added - failed);
	}

	#define DRIVERNAME "IBM Active 2000 ISDN driver"

	static int __init act2000_init(void)
	{
	printk(KERN_INFO "%s\n", DRIVERNAME);
	if (!cards)
	act2000_addcard(act_bus, act_port, act_irq, act_id);
	if (!cards)
	printk(KERN_INFO "act2000: No cards defined yet\n");
	return 0;
	}

	static void __exit act2000_exit(void)
	{
	act2000_card *card = cards;
	act2000_card *last;
	while (card) {
	unregister_card(card);
	del_timer_sync(&card->ptimer);
	card = card->next;
	}
	card = cards;
	while (card) {
	last = card;
	card = card->next;
	act2000_clear_msn(last);
	kfree(last);
	}
	printk(KERN_INFO "%s unloaded\n", DRIVERNAME);
	}

	module_init(act2000_init);
	module_exit(act2000_exit);