drivers/isdn/act2000/module.c

   1 /* $Id: module.c,v 1.14.6.4 2001/09/23 22:24:32 kai Exp $
   2  *
   3  * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000.
   4  *
   5  * Author       Fritz Elfert
   6  * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  * Thanks to Friedemann Baitinger and IBM Germany
  12  *
  13  */
  14
  15 #include "act2000.h"
  16 #include "act2000_isa.h"
  17 #include "capi.h"
  18 #include <linux/module.h>
  19 #include <linux/slab.h>
  20 #include <linux/init.h>
  21
  22 static unsigned short act2000_isa_ports[] =
  23 {
  24         0x0200, 0x0240, 0x0280, 0x02c0, 0x0300, 0x0340, 0x0380,
  25         0xcfe0, 0xcfa0, 0xcf60, 0xcf20, 0xcee0, 0xcea0, 0xce60,
  26 };
  27
  28 static act2000_card *cards = (act2000_card *) NULL;
  29
  30 /* Parameters to be set by insmod */
  31 static int   act_bus  =  0;
  32 static int   act_port = -1;  /* -1 = Autoprobe  */
  33 static int   act_irq  = -1;
  34 static char *act_id   = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
  35
  36 MODULE_DESCRIPTION("ISDN4Linux: Driver for IBM Active 2000 ISDN card");
  37 MODULE_AUTHOR("Fritz Elfert");
  38 MODULE_LICENSE("GPL");
  39 MODULE_PARM_DESC(act_bus, "BusType of first card, 1=ISA, 2=MCA, 3=PCMCIA, currently only ISA");
  40 MODULE_PARM_DESC(membase, "Base port address of first card");
  41 MODULE_PARM_DESC(act_irq, "IRQ of first card");
  42 MODULE_PARM_DESC(act_id, "ID-String of first card");
  43 module_param(act_bus, int, 0);
  44 module_param(act_port, int, 0);
  45 module_param(act_irq, int, 0);
  46 module_param(act_id, charp, 0);
  47
  48 static int act2000_addcard(int, int, int, char *);
  49
  50 static act2000_chan *
  51 find_channel(act2000_card *card, int channel)
  52 {
  53         if ((channel >= 0) && (channel < ACT2000_BCH))
  54                 return &(card->bch[channel]);
  55         printk(KERN_WARNING "act2000: Invalid channel %d\n", channel);
  56         return NULL;
  57 }
  58
  59 /*
  60  * Free MSN list
  61  */
  62 static void
  63 act2000_clear_msn(act2000_card *card)
  64 {
  65         struct msn_entry *p = card->msn_list;
  66         struct msn_entry *q;
  67         unsigned long flags;
  68
  69         spin_lock_irqsave(&card->lock, flags);
  70         card->msn_list = NULL;
  71         spin_unlock_irqrestore(&card->lock, flags);
  72         while (p) {
  73                 q  = p->next;
  74                 kfree(p);
  75                 p = q;
  76         }
  77 }
  78
  79 /*
  80  * Find an MSN entry in the list.
  81  * If ia5 != 0, return IA5-encoded EAZ, else
  82  * return a bitmask with corresponding bit set.
  83  */
  84 static __u16
  85 act2000_find_msn(act2000_card *card, char *msn, int ia5)
  86 {
  87         struct msn_entry *p = card->msn_list;
  88         __u8 eaz = '0';
  89
  90         while (p) {
  91                 if (!strcmp(p->msn, msn)) {
  92                         eaz = p->eaz;
  93                         break;
  94                 }
  95                 p = p->next;
  96         }
  97         if (!ia5)
  98                 return (1 << (eaz - '0'));
  99         else
 100                 return eaz;
 101 }
 102
 103 /*
 104  * Find an EAZ entry in the list.
 105  * return a string with corresponding msn.
 106  */
 107 char *
 108 act2000_find_eaz(act2000_card *card, char eaz)
 109 {
 110         struct msn_entry *p = card->msn_list;
 111
 112         while (p) {
 113                 if (p->eaz == eaz)
 114                         return (p->msn);
 115                 p = p->next;
 116         }
 117         return ("\0");
 118 }
 119
 120 /*
 121  * Add or delete an MSN to the MSN list
 122  *
 123  * First character of msneaz is EAZ, rest is MSN.
 124  * If length of eazmsn is 1, delete that entry.
 125  */
 126 static int
 127 act2000_set_msn(act2000_card *card, char *eazmsn)
 128 {
 129         struct msn_entry *p = card->msn_list;
 130         struct msn_entry *q = NULL;
 131         unsigned long flags;
 132         int i;
 133
 134         if (!strlen(eazmsn))
 135                 return 0;
 136         if (strlen(eazmsn) > 16)
 137                 return -EINVAL;
 138         for (i = 0; i < strlen(eazmsn); i++)
 139                 if (!isdigit(eazmsn[i]))
 140                         return -EINVAL;
 141         if (strlen(eazmsn) == 1) {
 142                 /* Delete a single MSN */
 143                 while (p) {
 144                         if (p->eaz == eazmsn[0]) {
 145                                 spin_lock_irqsave(&card->lock, flags);
 146                                 if (q)
 147                                         q->next = p->next;
 148                                 else
 149                                         card->msn_list = p->next;
 150                                 spin_unlock_irqrestore(&card->lock, flags);
 151                                 kfree(p);
 152                                 printk(KERN_DEBUG
 153                                        "Mapping for EAZ %c deleted\n",
 154                                        eazmsn[0]);
 155                                 return 0;
 156                         }
 157                         q = p;
 158                         p = p->next;
 159                 }
 160                 return 0;
 161         }
 162         /* Add a single MSN */
 163         while (p) {
 164                 /* Found in list, replace MSN */
 165                 if (p->eaz == eazmsn[0]) {
 166                         spin_lock_irqsave(&card->lock, flags);
 167                         strcpy(p->msn, &eazmsn[1]);
 168                         spin_unlock_irqrestore(&card->lock, flags);
 169                         printk(KERN_DEBUG
 170                                "Mapping for EAZ %c changed to %s\n",
 171                                eazmsn[0],
 172                                &eazmsn[1]);
 173                         return 0;
 174                 }
 175                 p = p->next;
 176         }
 177         /* Not found in list, add new entry */
 178         p = kmalloc(sizeof(msn_entry), GFP_KERNEL);
 179         if (!p)
 180                 return -ENOMEM;
 181         p->eaz = eazmsn[0];
 182         strcpy(p->msn, &eazmsn[1]);
 183         p->next = card->msn_list;
 184         spin_lock_irqsave(&card->lock, flags);
 185         card->msn_list = p;
 186         spin_unlock_irqrestore(&card->lock, flags);
 187         printk(KERN_DEBUG
 188                "Mapping %c -> %s added\n",
 189                eazmsn[0],
 190                &eazmsn[1]);
 191         return 0;
 192 }
 193
 194 static void
 195 act2000_transmit(struct work_struct *work)
 196 {
 197         struct act2000_card *card =
 198                 container_of(work, struct act2000_card, snd_tq);
 199
 200         switch (card->bus) {
 201         case ACT2000_BUS_ISA:
 202                 act2000_isa_send(card);
 203                 break;
 204         case ACT2000_BUS_PCMCIA:
 205         case ACT2000_BUS_MCA:
 206         default:
 207                 printk(KERN_WARNING
 208                        "act2000_transmit: Illegal bustype %d\n", card->bus);
 209         }
 210 }
 211
 212 static void
 213 act2000_receive(struct work_struct *work)
 214 {
 215         struct act2000_card *card =
 216                 container_of(work, struct act2000_card, poll_tq);
 217
 218         switch (card->bus) {
 219         case ACT2000_BUS_ISA:
 220                 act2000_isa_receive(card);
 221                 break;
 222         case ACT2000_BUS_PCMCIA:
 223         case ACT2000_BUS_MCA:
 224         default:
 225                 printk(KERN_WARNING
 226                        "act2000_receive: Illegal bustype %d\n", card->bus);
 227         }
 228 }
 229
 230 static void
 231 act2000_poll(unsigned long data)
 232 {
 233         act2000_card *card = (act2000_card *)data;
 234         unsigned long flags;
 235
 236         act2000_receive(&card->poll_tq);
 237         spin_lock_irqsave(&card->lock, flags);
 238         mod_timer(&card->ptimer, jiffies + 3);
 239         spin_unlock_irqrestore(&card->lock, flags);
 240 }
 241
 242 static int
 243 act2000_command(act2000_card *card, isdn_ctrl *c)
 244 {
 245         ulong a;
 246         act2000_chan *chan;
 247         act2000_cdef cdef;
 248         isdn_ctrl cmd;
 249         char tmp[17];
 250         int ret;
 251         unsigned long flags;
 252         void __user *arg;
 253
 254         switch (c->command) {
 255         case ISDN_CMD_IOCTL:
 256                 memcpy(&a, c->parm.num, sizeof(ulong));
 257                 arg = (void __user *)a;
 258                 switch (c->arg) {
 259                 case ACT2000_IOCTL_LOADBOOT:
 260                         switch (card->bus) {
 261                         case ACT2000_BUS_ISA:
 262                                 ret = act2000_isa_download(card,
 263                                                            arg);
 264                                 if (!ret) {
 265                                         card->flags |= ACT2000_FLAGS_LOADED;
 266                                         if (!(card->flags & ACT2000_FLAGS_IVALID)) {
 267                                                 card->ptimer.expires = jiffies + 3;
 268                                                 card->ptimer.function = act2000_poll;
 269                                                 card->ptimer.data = (unsigned long)card;
 270                                                 add_timer(&card->ptimer);
 271                                         }
 272                                         actcapi_manufacturer_req_errh(card);
 273                                 }
 274                                 break;
 275                         default:
 276                                 printk(KERN_WARNING
 277                                        "act2000: Illegal BUS type %d\n",
 278                                        card->bus);
 279                                 ret = -EIO;
 280                         }
 281                         return ret;
 282                 case ACT2000_IOCTL_SETPROTO:
 283                         card->ptype = a ? ISDN_PTYPE_EURO : ISDN_PTYPE_1TR6;
 284                         if (!(card->flags & ACT2000_FLAGS_RUNNING))
 285                                 return 0;
 286                         actcapi_manufacturer_req_net(card);
 287                         return 0;
 288                 case ACT2000_IOCTL_SETMSN:
 289                         if (copy_from_user(tmp, arg,
 290                                            sizeof(tmp)))
 291                                 return -EFAULT;
 292                         if ((ret = act2000_set_msn(card, tmp)))
 293                                 return ret;
 294                         if (card->flags & ACT2000_FLAGS_RUNNING)
 295                                 return (actcapi_manufacturer_req_msn(card));
 296                         return 0;
 297                 case ACT2000_IOCTL_ADDCARD:
 298                         if (copy_from_user(&cdef, arg,
 299                                            sizeof(cdef)))
 300                                 return -EFAULT;
 301                         if (act2000_addcard(cdef.bus, cdef.port, cdef.irq, cdef.id))
 302                                 return -EIO;
 303                         return 0;
 304                 case ACT2000_IOCTL_TEST:
 305                         if (!(card->flags & ACT2000_FLAGS_RUNNING))
 306                                 return -ENODEV;
 307                         return 0;
 308                 default:
 309                         return -EINVAL;
 310                 }
 311                 break;
 312         case ISDN_CMD_DIAL:
 313                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 314                         return -ENODEV;
 315                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 316                         break;
 317                 spin_lock_irqsave(&card->lock, flags);
 318                 if (chan->fsm_state != ACT2000_STATE_NULL) {
 319                         spin_unlock_irqrestore(&card->lock, flags);
 320                         printk(KERN_WARNING "Dial on channel with state %d\n",
 321                                chan->fsm_state);
 322                         return -EBUSY;
 323                 }
 324                 if (card->ptype == ISDN_PTYPE_EURO)
 325                         tmp[0] = act2000_find_msn(card, c->parm.setup.eazmsn, 1);
 326                 else
 327                         tmp[0] = c->parm.setup.eazmsn[0];
 328                 chan->fsm_state = ACT2000_STATE_OCALL;
 329                 chan->callref = 0xffff;
 330                 spin_unlock_irqrestore(&card->lock, flags);
 331                 ret = actcapi_connect_req(card, chan, c->parm.setup.phone,
 332                                           tmp[0], c->parm.setup.si1,
 333                                           c->parm.setup.si2);
 334                 if (ret) {
 335                         cmd.driver = card->myid;
 336                         cmd.command = ISDN_STAT_DHUP;
 337                         cmd.arg &= 0x0f;
 338                         card->interface.statcallb(&cmd);
 339                 }
 340                 return ret;
 341         case ISDN_CMD_ACCEPTD:
 342                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 343                         return -ENODEV;
 344                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 345                         break;
 346                 if (chan->fsm_state == ACT2000_STATE_ICALL)
 347                         actcapi_select_b2_protocol_req(card, chan);
 348                 return 0;
 349         case ISDN_CMD_ACCEPTB:
 350                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 351                         return -ENODEV;
 352                 return 0;
 353         case ISDN_CMD_HANGUP:
 354                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 355                         return -ENODEV;
 356                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 357                         break;
 358                 switch (chan->fsm_state) {
 359                 case ACT2000_STATE_ICALL:
 360                 case ACT2000_STATE_BSETUP:
 361                         actcapi_connect_resp(card, chan, 0x15);
 362                         break;
 363                 case ACT2000_STATE_ACTIVE:
 364                         actcapi_disconnect_b3_req(card, chan);
 365                         break;
 366                 }
 367                 return 0;
 368         case ISDN_CMD_SETEAZ:
 369                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 370                         return -ENODEV;
 371                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 372                         break;
 373                 if (strlen(c->parm.num)) {
 374                         if (card->ptype == ISDN_PTYPE_EURO) {
 375                                 chan->eazmask = act2000_find_msn(card, c->parm.num, 0);
 376                         }
 377                         if (card->ptype == ISDN_PTYPE_1TR6) {
 378                                 int i;
 379                                 chan->eazmask = 0;
 380                                 for (i = 0; i < strlen(c->parm.num); i++)
 381                                         if (isdigit(c->parm.num[i]))
 382                                                 chan->eazmask |= (1 << (c->parm.num[i] - '0'));
 383                         }
 384                 } else
 385                         chan->eazmask = 0x3ff;
 386                 actcapi_listen_req(card);
 387                 return 0;
 388         case ISDN_CMD_CLREAZ:
 389                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 390                         return -ENODEV;
 391                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 392                         break;
 393                 chan->eazmask = 0;
 394                 actcapi_listen_req(card);
 395                 return 0;
 396         case ISDN_CMD_SETL2:
 397                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 398                         return -ENODEV;
 399                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 400                         break;
 401                 chan->l2prot = (c->arg >> 8);
 402                 return 0;
 403         case ISDN_CMD_SETL3:
 404                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 405                         return -ENODEV;
 406                 if ((c->arg >> 8) != ISDN_PROTO_L3_TRANS) {
 407                         printk(KERN_WARNING "L3 protocol unknown\n");
 408                         return -1;
 409                 }
 410                 if (!(chan = find_channel(card, c->arg & 0x0f)))
 411                         break;
 412                 chan->l3prot = (c->arg >> 8);
 413                 return 0;
 414         }
 415
 416         return -EINVAL;
 417 }
 418
 419 static int
 420 act2000_sendbuf(act2000_card *card, int channel, int ack, struct sk_buff *skb)
 421 {
 422         struct sk_buff *xmit_skb;
 423         int len;
 424         act2000_chan *chan;
 425         actcapi_msg *msg;
 426
 427         if (!(chan = find_channel(card, channel)))
 428                 return -1;
 429         if (chan->fsm_state != ACT2000_STATE_ACTIVE)
 430                 return -1;
 431         len = skb->len;
 432         if ((chan->queued + len) >= ACT2000_MAX_QUEUED)
 433                 return 0;
 434         if (!len)
 435                 return 0;
 436         if (skb_headroom(skb) < 19) {
 437                 printk(KERN_WARNING "act2000_sendbuf: Headroom only %d\n",
 438                        skb_headroom(skb));
 439                 xmit_skb = alloc_skb(len + 19, GFP_ATOMIC);
 440                 if (!xmit_skb) {
 441                         printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 442                         return 0;
 443                 }
 444                 skb_reserve(xmit_skb, 19);
 445                 skb_copy_from_linear_data(skb, skb_put(xmit_skb, len), len);
 446         } else {
 447                 xmit_skb = skb_clone(skb, GFP_ATOMIC);
 448                 if (!xmit_skb) {
 449                         printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 450                         return 0;
 451                 }
 452         }
 453         dev_kfree_skb(skb);
 454         msg = (actcapi_msg *)skb_push(xmit_skb, 19);
 455         msg->hdr.len = 19 + len;
 456         msg->hdr.applicationID = 1;
 457         msg->hdr.cmd.cmd = 0x86;
 458         msg->hdr.cmd.subcmd = 0x00;
 459         msg->hdr.msgnum = actcapi_nextsmsg(card);
 460         msg->msg.data_b3_req.datalen = len;
 461         msg->msg.data_b3_req.blocknr = (msg->hdr.msgnum & 0xff);
 462         msg->msg.data_b3_req.fakencci = MAKE_NCCI(chan->plci, 0, chan->ncci);
 463         msg->msg.data_b3_req.flags = ack; /* Will be set to 0 on actual sending */
 464         actcapi_debug_msg(xmit_skb, 1);
 465         chan->queued += len;
 466         skb_queue_tail(&card->sndq, xmit_skb);
 467         act2000_schedule_tx(card);
 468         return len;
 469 }
 470
 471
 472 /* Read the Status-replies from the Interface */
 473 static int
 474 act2000_readstatus(u_char __user *buf, int len, act2000_card *card)
 475 {
 476         int count;
 477         u_char __user *p;
 478
 479         for (p = buf, count = 0; count < len; p++, count++) {
 480                 if (card->status_buf_read == card->status_buf_write)
 481                         return count;
 482                 put_user(*card->status_buf_read++, p);
 483                 if (card->status_buf_read > card->status_buf_end)
 484                         card->status_buf_read = card->status_buf;
 485         }
 486         return count;
 487 }
 488
 489 /*
 490  * Find card with given driverId
 491  */
 492 static inline act2000_card *
 493 act2000_findcard(int driverid)
 494 {
 495         act2000_card *p = cards;
 496
 497         while (p) {
 498                 if (p->myid == driverid)
 499                         return p;
 500                 p = p->next;
 501         }
 502         return (act2000_card *) 0;
 503 }
 504
 505 /*
 506  * Wrapper functions for interface to linklevel
 507  */
 508 static int
 509 if_command(isdn_ctrl *c)
 510 {
 511         act2000_card *card = act2000_findcard(c->driver);
 512
 513         if (card)
 514                 return (act2000_command(card, c));
 515         printk(KERN_ERR
 516                "act2000: if_command %d called with invalid driverId %d!\n",
 517                c->command, c->driver);
 518         return -ENODEV;
 519 }
 520
 521 static int
 522 if_writecmd(const u_char __user *buf, int len, int id, int channel)
 523 {
 524         act2000_card *card = act2000_findcard(id);
 525
 526         if (card) {
 527                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 528                         return -ENODEV;
 529                 return (len);
 530         }
 531         printk(KERN_ERR
 532                "act2000: if_writecmd called with invalid driverId!\n");
 533         return -ENODEV;
 534 }
 535
 536 static int
 537 if_readstatus(u_char __user *buf, int len, int id, int channel)
 538 {
 539         act2000_card *card = act2000_findcard(id);
 540
 541         if (card) {
 542                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 543                         return -ENODEV;
 544                 return (act2000_readstatus(buf, len, card));
 545         }
 546         printk(KERN_ERR
 547                "act2000: if_readstatus called with invalid driverId!\n");
 548         return -ENODEV;
 549 }
 550
 551 static int
 552 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
 553 {
 554         act2000_card *card = act2000_findcard(id);
 555
 556         if (card) {
 557                 if (!(card->flags & ACT2000_FLAGS_RUNNING))
 558                         return -ENODEV;
 559                 return (act2000_sendbuf(card, channel, ack, skb));
 560         }
 561         printk(KERN_ERR
 562                "act2000: if_sendbuf called with invalid driverId!\n");
 563         return -ENODEV;
 564 }
 565
 566
 567 /*
 568  * Allocate a new card-struct, initialize it
 569  * link it into cards-list.
 570  */
 571 static void
 572 act2000_alloccard(int bus, int port, int irq, char *id)
 573 {
 574         int i;
 575         act2000_card *card;
 576         if (!(card = kzalloc(sizeof(act2000_card), GFP_KERNEL))) {
 577                 printk(KERN_WARNING
 578                        "act2000: (%s) Could not allocate card-struct.\n", id);
 579                 return;
 580         }
 581         spin_lock_init(&card->lock);
 582         spin_lock_init(&card->mnlock);
 583         skb_queue_head_init(&card->sndq);
 584         skb_queue_head_init(&card->rcvq);
 585         skb_queue_head_init(&card->ackq);
 586         INIT_WORK(&card->snd_tq, act2000_transmit);
 587         INIT_WORK(&card->rcv_tq, actcapi_dispatch);
 588         INIT_WORK(&card->poll_tq, act2000_receive);
 589         init_timer(&card->ptimer);
 590         card->interface.owner = THIS_MODULE;
 591         card->interface.channels = ACT2000_BCH;
 592         card->interface.maxbufsize = 4000;
 593         card->interface.command = if_command;
 594         card->interface.writebuf_skb = if_sendbuf;
 595         card->interface.writecmd = if_writecmd;
 596         card->interface.readstat = if_readstatus;
 597         card->interface.features =
 598                 ISDN_FEATURE_L2_X75I |
 599                 ISDN_FEATURE_L2_HDLC |
 600                 ISDN_FEATURE_L3_TRANS |
 601                 ISDN_FEATURE_P_UNKNOWN;
 602         card->interface.hl_hdrlen = 20;
 603         card->ptype = ISDN_PTYPE_EURO;
 604         strlcpy(card->interface.id, id, sizeof(card->interface.id));
 605         for (i = 0; i < ACT2000_BCH; i++) {
 606                 card->bch[i].plci = 0x8000;
 607                 card->bch[i].ncci = 0x8000;
 608                 card->bch[i].l2prot = ISDN_PROTO_L2_X75I;
 609                 card->bch[i].l3prot = ISDN_PROTO_L3_TRANS;
 610         }
 611         card->myid = -1;
 612         card->bus = bus;
 613         card->port = port;
 614         card->irq = irq;
 615         card->next = cards;
 616         cards = card;
 617 }
 618
 619 /*
 620  * register card at linklevel
 621  */
 622 static int
 623 act2000_registercard(act2000_card *card)
 624 {
 625         switch (card->bus) {
 626         case ACT2000_BUS_ISA:
 627                 break;
 628         case ACT2000_BUS_MCA:
 629         case ACT2000_BUS_PCMCIA:
 630         default:
 631                 printk(KERN_WARNING
 632                        "act2000: Illegal BUS type %d\n",
 633                        card->bus);
 634                 return -1;
 635         }
 636         if (!register_isdn(&card->interface)) {
 637                 printk(KERN_WARNING
 638                        "act2000: Unable to register %s\n",
 639                        card->interface.id);
 640                 return -1;
 641         }
 642         card->myid = card->interface.channels;
 643         sprintf(card->regname, "act2000-isdn (%s)", card->interface.id);
 644         return 0;
 645 }
 646
 647 static void
 648 unregister_card(act2000_card *card)
 649 {
 650         isdn_ctrl cmd;
 651
 652         cmd.command = ISDN_STAT_UNLOAD;
 653         cmd.driver = card->myid;
 654         card->interface.statcallb(&cmd);
 655         switch (card->bus) {
 656         case ACT2000_BUS_ISA:
 657                 act2000_isa_release(card);
 658                 break;
 659         case ACT2000_BUS_MCA:
 660         case ACT2000_BUS_PCMCIA:
 661         default:
 662                 printk(KERN_WARNING
 663                        "act2000: Invalid BUS type %d\n",
 664                        card->bus);
 665                 break;
 666         }
 667 }
 668
 669 static int
 670 act2000_addcard(int bus, int port, int irq, char *id)
 671 {
 672         act2000_card *p;
 673         act2000_card *q = NULL;
 674         int initialized;
 675         int added = 0;
 676         int failed = 0;
 677         int i;
 678
 679         if (!bus)
 680                 bus = ACT2000_BUS_ISA;
 681         if (port != -1) {
 682                 /* Port defined, do fixed setup */
 683                 act2000_alloccard(bus, port, irq, id);
 684         } else {
 685                 /* No port defined, perform autoprobing.
 686                  * This may result in more than one card detected.
 687                  */
 688                 switch (bus) {
 689                 case ACT2000_BUS_ISA:
 690                         for (i = 0; i < ARRAY_SIZE(act2000_isa_ports); i++)
 691                                 if (act2000_isa_detect(act2000_isa_ports[i])) {
 692                                         printk(KERN_INFO "act2000: Detected "
 693                                                "ISA card at port 0x%x\n",
 694                                                act2000_isa_ports[i]);
 695                                         act2000_alloccard(bus,
 696                                                           act2000_isa_ports[i], irq, id);
 697                                 }
 698                         break;
 699                 case ACT2000_BUS_MCA:
 700                 case ACT2000_BUS_PCMCIA:
 701                 default:
 702                         printk(KERN_WARNING
 703                                "act2000: addcard: Invalid BUS type %d\n", bus);
 704                 }
 705         }
 706         if (!cards)
 707                 return 1;
 708         p = cards;
 709         while (p) {
 710                 initialized = 0;
 711                 if (!p->interface.statcallb) {
 712                         /* Not yet registered.
 713                          * Try to register and activate it.
 714                          */
 715                         added++;
 716                         switch (p->bus) {
 717                         case ACT2000_BUS_ISA:
 718                                 if (act2000_isa_detect(p->port)) {
 719                                         if (act2000_registercard(p))
 720                                                 break;
 721                                         if (act2000_isa_config_port(p, p->port)) {
 722                                                 printk(KERN_WARNING
 723                                                        "act2000: Could not request port 0x%04x\n",
 724                                                        p->port);
 725                                                 unregister_card(p);
 726                                                 p->interface.statcallb = NULL;
 727                                                 break;
 728                                         }
 729                                         if (act2000_isa_config_irq(p, p->irq)) {
 730                                                 printk(KERN_INFO
 731                                                        "act2000: No IRQ available, fallback to polling\n");
 732                                                 /* Fall back to polled operation */
 733                                                 p->irq = 0;
 734                                         }
 735                                         printk(KERN_INFO
 736                                                "act2000: ISA"
 737                                                "-type card at port "
 738                                                "0x%04x ",
 739                                                p->port);
 740                                         if (p->irq)
 741                                                 printk("irq %d\n", p->irq);
 742                                         else
 743                                                 printk("polled\n");
 744                                         initialized = 1;
 745                                 }
 746                                 break;
 747                         case ACT2000_BUS_MCA:
 748                         case ACT2000_BUS_PCMCIA:
 749                         default:
 750                                 printk(KERN_WARNING
 751                                        "act2000: addcard: Invalid BUS type %d\n",
 752                                        p->bus);
 753                         }
 754                 } else
 755                         /* Card already initialized */
 756                         initialized = 1;
 757                 if (initialized) {
 758                         /* Init OK, next card ... */
 759                         q = p;
 760                         p = p->next;
 761                 } else {
 762                         /* Init failed, remove card from list, free memory */
 763                         printk(KERN_WARNING
 764                                "act2000: Initialization of %s failed\n",
 765                                p->interface.id);
 766                         if (q) {
 767                                 q->next = p->next;
 768                                 kfree(p);
 769                                 p = q->next;
 770                         } else {
 771                                 cards = p->next;
 772                                 kfree(p);
 773                                 p = cards;
 774                         }
 775                         failed++;
 776                 }
 777         }
 778         return (added - failed);
 779 }
 780
 781 #define DRIVERNAME "IBM Active 2000 ISDN driver"
 782
 783 static int __init act2000_init(void)
 784 {
 785         printk(KERN_INFO "%s\n", DRIVERNAME);
 786         if (!cards)
 787                 act2000_addcard(act_bus, act_port, act_irq, act_id);
 788         if (!cards)
 789                 printk(KERN_INFO "act2000: No cards defined yet\n");
 790         return 0;
 791 }
 792
 793 static void __exit act2000_exit(void)
 794 {
 795         act2000_card *card = cards;
 796         act2000_card *last;
 797         while (card) {
 798                 unregister_card(card);
 799                 del_timer(&card->ptimer);
 800                 card = card->next;
 801         }
 802         card = cards;
 803         while (card) {
 804                 last = card;
 805                 card = card->next;
 806                 act2000_clear_msn(last);
 807                 kfree(last);
 808         }
 809         printk(KERN_INFO "%s unloaded\n", DRIVERNAME);
 810 }
 811
 812 module_init(act2000_init);
 813 module_exit(act2000_exit);