aboutsummaryrefslogtreecommitdiff
path: root/drivers/isdn/act2000/module.c
blob: f774e12bb64dc4cbf816c27878813e844a814c19 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
/* $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/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(membase, "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(&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);