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/init.h>
  20
  21 static unsigned short act2000_isa_ports[] =
  22 {
  23         0x0200, 0x0240, 0x0280, 0x02c0, 0x0300, 0x0340, 0x0380,
  24         0xcfe0, 0xcfa0, 0xcf60, 0xcf20, 0xcee0, 0xcea0, 0xce60,
  25 };
  26 #define ISA_NRPORTS (sizeof(act2000_isa_ports)/sizeof(unsigned short))
  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 act2000_card *card)
 196 {
 197         switch (card->bus) {
 198                 case ACT2000_BUS_ISA:
 199                         act2000_isa_send(card);
 200                         break;
 201                 case ACT2000_BUS_PCMCIA:
 202                 case ACT2000_BUS_MCA:
 203                 default:
 204                         printk(KERN_WARNING
 205                                "act2000_transmit: Illegal bustype %d\n", card->bus);
 206         }
 207 }
 208
 209 static void
 210 act2000_receive(struct act2000_card *card)
 211 {
 212         switch (card->bus) {
 213                 case ACT2000_BUS_ISA:
 214                         act2000_isa_receive(card);
 215                         break;
 216                 case ACT2000_BUS_PCMCIA:
 217                 case ACT2000_BUS_MCA:
 218                 default:
 219                         printk(KERN_WARNING
 220                                "act2000_receive: Illegal bustype %d\n", card->bus);
 221         }
 222 }
 223
 224 static void
 225 act2000_poll(unsigned long data)
 226 {
 227         act2000_card * card = (act2000_card *)data;
 228         unsigned long flags;
 229
 230         act2000_receive(card);
 231         spin_lock_irqsave(&card->lock, flags);
 232         mod_timer(&card->ptimer, jiffies+3);
 233         spin_unlock_irqrestore(&card->lock, flags);
 234 }
 235
 236 static int
 237 act2000_command(act2000_card * card, isdn_ctrl * c)
 238 {
 239         ulong a;
 240         act2000_chan *chan;
 241         act2000_cdef cdef;
 242         isdn_ctrl cmd;
 243         char tmp[17];
 244         int ret;
 245         unsigned long flags;
 246         void __user *arg;
 247
 248         switch (c->command) {
 249                 case ISDN_CMD_IOCTL:
 250                         memcpy(&a, c->parm.num, sizeof(ulong));
 251                         arg = (void __user *)a;
 252                         switch (c->arg) {
 253                                 case ACT2000_IOCTL_LOADBOOT:
 254                                         switch (card->bus) {
 255                                                 case ACT2000_BUS_ISA:
 256                                                         ret = act2000_isa_download(card,
 257                                                                            arg);
 258                                                         if (!ret) {
 259                                                                 card->flags |= ACT2000_FLAGS_LOADED;
 260                                                                 if (!(card->flags & ACT2000_FLAGS_IVALID)) {
 261                                                                         card->ptimer.expires = jiffies + 3;
 262                                                                         card->ptimer.function = act2000_poll;
 263                                                                         card->ptimer.data = (unsigned long)card;
 264                                                                         add_timer(&card->ptimer);
 265                                                                 }
 266                                                                 actcapi_manufacturer_req_errh(card);
 267                                                         }
 268                                                         break;
 269                                                 default:
 270                                                         printk(KERN_WARNING
 271                                                                "act2000: Illegal BUS type %d\n",
 272                                                                card->bus);
 273                                                         ret = -EIO;
 274                                         }
 275                                         return ret;
 276                                 case ACT2000_IOCTL_SETPROTO:
 277                                         card->ptype = a?ISDN_PTYPE_EURO:ISDN_PTYPE_1TR6;
 278                                         if (!(card->flags & ACT2000_FLAGS_RUNNING))
 279                                                 return 0;
 280                                         actcapi_manufacturer_req_net(card);
 281                                         return 0;
 282                                 case ACT2000_IOCTL_SETMSN:
 283                                         if (copy_from_user(tmp, arg,
 284                                                            sizeof(tmp)))
 285                                                 return -EFAULT;
 286                                         if ((ret = act2000_set_msn(card, tmp)))
 287                                                 return ret;
 288                                         if (card->flags & ACT2000_FLAGS_RUNNING)
 289                                                 return(actcapi_manufacturer_req_msn(card));
 290                                         return 0;
 291                                 case ACT2000_IOCTL_ADDCARD:
 292                                         if (copy_from_user(&cdef, arg,
 293                                                            sizeof(cdef)))
 294                                                 return -EFAULT;
 295                                         if (act2000_addcard(cdef.bus, cdef.port, cdef.irq, cdef.id))
 296                                                 return -EIO;
 297                                         return 0;
 298                                 case ACT2000_IOCTL_TEST:
 299                                         if (!(card->flags & ACT2000_FLAGS_RUNNING))
 300                                                 return -ENODEV;
 301                                         return 0;
 302                                 default:
 303                                         return -EINVAL;
 304                         }
 305                         break;
 306                 case ISDN_CMD_DIAL:
 307                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 308                                 return -ENODEV;
 309                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 310                                 break;
 311                         spin_lock_irqsave(&card->lock, flags);
 312                         if (chan->fsm_state != ACT2000_STATE_NULL) {
 313                                 spin_unlock_irqrestore(&card->lock, flags);
 314                                 printk(KERN_WARNING "Dial on channel with state %d\n",
 315                                         chan->fsm_state);
 316                                 return -EBUSY;
 317                         }
 318                         if (card->ptype == ISDN_PTYPE_EURO)
 319                                 tmp[0] = act2000_find_msn(card, c->parm.setup.eazmsn, 1);
 320                         else
 321                                 tmp[0] = c->parm.setup.eazmsn[0];
 322                         chan->fsm_state = ACT2000_STATE_OCALL;
 323                         chan->callref = 0xffff;
 324                         spin_unlock_irqrestore(&card->lock, flags);
 325                         ret = actcapi_connect_req(card, chan, c->parm.setup.phone,
 326                                                   tmp[0], c->parm.setup.si1,
 327                                                   c->parm.setup.si2);
 328                         if (ret) {
 329                                 cmd.driver = card->myid;
 330                                 cmd.command = ISDN_STAT_DHUP;
 331                                 cmd.arg &= 0x0f;
 332                                 card->interface.statcallb(&cmd);
 333                         }
 334                         return ret;
 335                 case ISDN_CMD_ACCEPTD:
 336                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 337                                 return -ENODEV;
 338                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 339                                 break;
 340                         if (chan->fsm_state == ACT2000_STATE_ICALL)
 341                                 actcapi_select_b2_protocol_req(card, chan);
 342                         return 0;
 343                 case ISDN_CMD_ACCEPTB:
 344                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 345                                 return -ENODEV;
 346                         return 0;
 347                 case ISDN_CMD_HANGUP:
 348                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 349                                 return -ENODEV;
 350                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 351                                 break;
 352                         switch (chan->fsm_state) {
 353                                 case ACT2000_STATE_ICALL:
 354                                 case ACT2000_STATE_BSETUP:
 355                                         actcapi_connect_resp(card, chan, 0x15);
 356                                         break;
 357                                 case ACT2000_STATE_ACTIVE:
 358                                         actcapi_disconnect_b3_req(card, chan);
 359                                         break;
 360                         }
 361                         return 0;
 362                 case ISDN_CMD_SETEAZ:
 363                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 364                                 return -ENODEV;
 365                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 366                                 break;
 367                         if (strlen(c->parm.num)) {
 368                                 if (card->ptype == ISDN_PTYPE_EURO) {
 369                                         chan->eazmask = act2000_find_msn(card, c->parm.num, 0);
 370                                 }
 371                                 if (card->ptype == ISDN_PTYPE_1TR6) {
 372                                         int i;
 373                                         chan->eazmask = 0;
 374                                         for (i = 0; i < strlen(c->parm.num); i++)
 375                                                 if (isdigit(c->parm.num[i]))
 376                                                         chan->eazmask |= (1 << (c->parm.num[i] - '0'));
 377                                 }
 378                         } else
 379                                 chan->eazmask = 0x3ff;
 380                         actcapi_listen_req(card);
 381                         return 0;
 382                 case ISDN_CMD_CLREAZ:
 383                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 384                                 return -ENODEV;
 385                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 386                                 break;
 387                         chan->eazmask = 0;
 388                         actcapi_listen_req(card);
 389                         return 0;
 390                 case ISDN_CMD_SETL2:
 391                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 392                                 return -ENODEV;
 393                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 394                                 break;
 395                         chan->l2prot = (c->arg >> 8);
 396                         return 0;
 397                 case ISDN_CMD_SETL3:
 398                         if (!card->flags & ACT2000_FLAGS_RUNNING)
 399                                 return -ENODEV;
 400                         if ((c->arg >> 8) != ISDN_PROTO_L3_TRANS) {
 401                                 printk(KERN_WARNING "L3 protocol unknown\n");
 402                                 return -1;
 403                         }
 404                         if (!(chan = find_channel(card, c->arg & 0x0f)))
 405                                 break;
 406                         chan->l3prot = (c->arg >> 8);
 407                         return 0;
 408         }
 409
 410         return -EINVAL;
 411 }
 412
 413 static int
 414 act2000_sendbuf(act2000_card *card, int channel, int ack, struct sk_buff *skb)
 415 {
 416         struct sk_buff *xmit_skb;
 417         int len;
 418         act2000_chan *chan;
 419         actcapi_msg *msg;
 420
 421         if (!(chan = find_channel(card, channel)))
 422                 return -1;
 423         if (chan->fsm_state != ACT2000_STATE_ACTIVE)
 424                 return -1;
 425         len = skb->len;
 426         if ((chan->queued + len) >= ACT2000_MAX_QUEUED)
 427                 return 0;
 428         if (!len)
 429                 return 0;
 430         if (skb_headroom(skb) < 19) {
 431                 printk(KERN_WARNING "act2000_sendbuf: Headroom only %d\n",
 432                        skb_headroom(skb));
 433                 xmit_skb = alloc_skb(len + 19, GFP_ATOMIC);
 434                 if (!xmit_skb) {
 435                         printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 436                         return 0;
 437                 }
 438                 skb_reserve(xmit_skb, 19);
 439                 memcpy(skb_put(xmit_skb, len), skb->data, len);
 440         } else {
 441                 xmit_skb = skb_clone(skb, GFP_ATOMIC);
 442                 if (!xmit_skb) {
 443                         printk(KERN_WARNING "act2000_sendbuf: Out of memory\n");
 444                         return 0;
 445                 }
 446         }
 447         dev_kfree_skb(skb);
 448         msg = (actcapi_msg *)skb_push(xmit_skb, 19);
 449         msg->hdr.len = 19 + len;
 450         msg->hdr.applicationID = 1;
 451         msg->hdr.cmd.cmd = 0x86;
 452         msg->hdr.cmd.subcmd = 0x00;
 453         msg->hdr.msgnum = actcapi_nextsmsg(card);
 454         msg->msg.data_b3_req.datalen = len;
 455         msg->msg.data_b3_req.blocknr = (msg->hdr.msgnum & 0xff);
 456         msg->msg.data_b3_req.fakencci = MAKE_NCCI(chan->plci, 0, chan->ncci);
 457         msg->msg.data_b3_req.flags = ack; /* Will be set to 0 on actual sending */
 458         actcapi_debug_msg(xmit_skb, 1);
 459         chan->queued += len;
 460         skb_queue_tail(&card->sndq, xmit_skb);
 461         act2000_schedule_tx(card);
 462         return len;
 463 }
 464
 465
 466 /* Read the Status-replies from the Interface */
 467 static int
 468 act2000_readstatus(u_char __user * buf, int len, act2000_card * card)
 469 {
 470         int count;
 471         u_char __user *p;
 472
 473         for (p = buf, count = 0; count < len; p++, count++) {
 474                 if (card->status_buf_read == card->status_buf_write)
 475                         return count;
 476                 put_user(*card->status_buf_read++, p);
 477                 if (card->status_buf_read > card->status_buf_end)
 478                         card->status_buf_read = card->status_buf;
 479         }
 480         return count;
 481 }
 482
 483 /*
 484  * Find card with given driverId
 485  */
 486 static inline act2000_card *
 487 act2000_findcard(int driverid)
 488 {
 489         act2000_card *p = cards;
 490
 491         while (p) {
 492                 if (p->myid == driverid)
 493                         return p;
 494                 p = p->next;
 495         }
 496         return (act2000_card *) 0;
 497 }
 498
 499 /*
 500  * Wrapper functions for interface to linklevel
 501  */
 502 static int
 503 if_command(isdn_ctrl * c)
 504 {
 505         act2000_card *card = act2000_findcard(c->driver);
 506
 507         if (card)
 508                 return (act2000_command(card, c));
 509         printk(KERN_ERR
 510              "act2000: if_command %d called with invalid driverId %d!\n",
 511                c->command, c->driver);
 512         return -ENODEV;
 513 }
 514
 515 static int
 516 if_writecmd(const u_char __user *buf, int len, int id, int channel)
 517 {
 518         act2000_card *card = act2000_findcard(id);
 519
 520         if (card) {
 521                 if (!card->flags & ACT2000_FLAGS_RUNNING)
 522                         return -ENODEV;
 523                 return (len);
 524         }
 525         printk(KERN_ERR
 526                "act2000: if_writecmd called with invalid driverId!\n");
 527         return -ENODEV;
 528 }
 529
 530 static int
 531 if_readstatus(u_char __user * buf, int len, int id, int channel)
 532 {
 533         act2000_card *card = act2000_findcard(id);
 534
 535         if (card) {
 536                 if (!card->flags & ACT2000_FLAGS_RUNNING)
 537                         return -ENODEV;
 538                 return (act2000_readstatus(buf, len, card));
 539         }
 540         printk(KERN_ERR
 541                "act2000: if_readstatus called with invalid driverId!\n");
 542         return -ENODEV;
 543 }
 544
 545 static int
 546 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
 547 {
 548         act2000_card *card = act2000_findcard(id);
 549
 550         if (card) {
 551                 if (!card->flags & ACT2000_FLAGS_RUNNING)
 552                         return -ENODEV;
 553                 return (act2000_sendbuf(card, channel, ack, skb));
 554         }
 555         printk(KERN_ERR
 556                "act2000: if_sendbuf called with invalid driverId!\n");
 557         return -ENODEV;
 558 }
 559
 560
 561 /*
 562  * Allocate a new card-struct, initialize it
 563  * link it into cards-list.
 564  */
 565 static void
 566 act2000_alloccard(int bus, int port, int irq, char *id)
 567 {
 568         int i;
 569         act2000_card *card;
 570         if (!(card = (act2000_card *) kmalloc(sizeof(act2000_card), GFP_KERNEL))) {
 571                 printk(KERN_WARNING
 572                        "act2000: (%s) Could not allocate card-struct.\n", id);
 573                 return;
 574         }
 575         memset((char *) card, 0, sizeof(act2000_card));
 576         spin_lock_init(&card->lock);
 577         spin_lock_init(&card->mnlock);
 578         skb_queue_head_init(&card->sndq);
 579         skb_queue_head_init(&card->rcvq);
 580         skb_queue_head_init(&card->ackq);
 581         INIT_WORK(&card->snd_tq, (void *) (void *) act2000_transmit, card);
 582         INIT_WORK(&card->rcv_tq, (void *) (void *) actcapi_dispatch, card);
 583         INIT_WORK(&card->poll_tq, (void *) (void *) act2000_receive, card);
 584         init_timer(&card->ptimer);
 585         card->interface.owner = THIS_MODULE;
 586         card->interface.channels = ACT2000_BCH;
 587         card->interface.maxbufsize = 4000;
 588         card->interface.command = if_command;
 589         card->interface.writebuf_skb = if_sendbuf;
 590         card->interface.writecmd = if_writecmd;
 591         card->interface.readstat = if_readstatus;
 592         card->interface.features =
 593                 ISDN_FEATURE_L2_X75I |
 594                 ISDN_FEATURE_L2_HDLC |
 595                 ISDN_FEATURE_L3_TRANS |
 596                 ISDN_FEATURE_P_UNKNOWN;
 597         card->interface.hl_hdrlen = 20;
 598         card->ptype = ISDN_PTYPE_EURO;
 599         strlcpy(card->interface.id, id, sizeof(card->interface.id));
 600         for (i=0; i<ACT2000_BCH; i++) {
 601                 card->bch[i].plci = 0x8000;
 602                 card->bch[i].ncci = 0x8000;
 603                 card->bch[i].l2prot = ISDN_PROTO_L2_X75I;
 604                 card->bch[i].l3prot = ISDN_PROTO_L3_TRANS;
 605         }
 606         card->myid = -1;
 607         card->bus = bus;
 608         card->port = port;
 609         card->irq = irq;
 610         card->next = cards;
 611         cards = card;
 612 }
 613
 614 /*
 615  * register card at linklevel
 616  */
 617 static int
 618 act2000_registercard(act2000_card * card)
 619 {
 620         switch (card->bus) {
 621                 case ACT2000_BUS_ISA:
 622                         break;
 623                 case ACT2000_BUS_MCA:
 624                 case ACT2000_BUS_PCMCIA:
 625                 default:
 626                         printk(KERN_WARNING
 627                                "act2000: Illegal BUS type %d\n",
 628                                card->bus);
 629                         return -1;
 630         }
 631         if (!register_isdn(&card->interface)) {
 632                 printk(KERN_WARNING
 633                        "act2000: Unable to register %s\n",
 634                        card->interface.id);
 635                 return -1;
 636         }
 637         card->myid = card->interface.channels;
 638         sprintf(card->regname, "act2000-isdn (%s)", card->interface.id);
 639         return 0;
 640 }
 641
 642 static void
 643 unregister_card(act2000_card * card)
 644 {
 645         isdn_ctrl cmd;
 646
 647         cmd.command = ISDN_STAT_UNLOAD;
 648         cmd.driver = card->myid;
 649         card->interface.statcallb(&cmd);
 650         switch (card->bus) {
 651                 case ACT2000_BUS_ISA:
 652                         act2000_isa_release(card);
 653                         break;
 654                 case ACT2000_BUS_MCA:
 655                 case ACT2000_BUS_PCMCIA:
 656                 default:
 657                         printk(KERN_WARNING
 658                                "act2000: Invalid BUS type %d\n",
 659                                card->bus);
 660                         break;
 661         }
 662 }
 663
 664 static int
 665 act2000_addcard(int bus, int port, int irq, char *id)
 666 {
 667         act2000_card *p;
 668         act2000_card *q = NULL;
 669         int initialized;
 670         int added = 0;
 671         int failed = 0;
 672         int i;
 673
 674         if (!bus)
 675                 bus = ACT2000_BUS_ISA;
 676         if (port != -1) {
 677                 /* Port defined, do fixed setup */
 678                 act2000_alloccard(bus, port, irq, id);
 679         } else {
 680                 /* No port defined, perform autoprobing.
 681                  * This may result in more than one card detected.
 682                  */
 683                 switch (bus) {
 684                         case ACT2000_BUS_ISA:
 685                                 for (i = 0; i < ISA_NRPORTS; i++)
 686                                         if (act2000_isa_detect(act2000_isa_ports[i])) {
 687                                                 printk(KERN_INFO
 688                                                        "act2000: Detected ISA card at port 0x%x\n",
 689                                                        act2000_isa_ports[i]);
 690                                                 act2000_alloccard(bus, act2000_isa_ports[i], irq, id);
 691                                         }
 692                                 break;
 693                         case ACT2000_BUS_MCA:
 694                         case ACT2000_BUS_PCMCIA:
 695                         default:
 696                                 printk(KERN_WARNING
 697                                        "act2000: addcard: Invalid BUS type %d\n",
 698                                        bus);
 699                 }
 700         }
 701         if (!cards)
 702                 return 1;
 703         p = cards;
 704         while (p) {
 705                 initialized = 0;
 706                 if (!p->interface.statcallb) {
 707                         /* Not yet registered.
 708                          * Try to register and activate it.
 709                          */
 710                         added++;
 711                         switch (p->bus) {
 712                                 case ACT2000_BUS_ISA:
 713                                         if (act2000_isa_detect(p->port)) {
 714                                                 if (act2000_registercard(p))
 715                                                         break;
 716                                                 if (act2000_isa_config_port(p, p->port)) {
 717                                                         printk(KERN_WARNING
 718                                                                "act2000: Could not request port 0x%04x\n",
 719                                                                p->port);
 720                                                         unregister_card(p);
 721                                                         p->interface.statcallb = NULL;
 722                                                         break;
 723                                                 }
 724                                                 if (act2000_isa_config_irq(p, p->irq)) {
 725                                                         printk(KERN_INFO
 726                                                                "act2000: No IRQ available, fallback to polling\n");
 727                                                         /* Fall back to polled operation */
 728                                                         p->irq = 0;
 729                                                 }
 730                                                 printk(KERN_INFO
 731                                                        "act2000: ISA"
 732                                                        "-type card at port "
 733                                                        "0x%04x ",
 734                                                        p->port);
 735                                                 if (p->irq)
 736                                                         printk("irq %d\n", p->irq);
 737                                                 else
 738                                                         printk("polled\n");
 739                                                 initialized = 1;
 740                                         }
 741                                         break;
 742                                 case ACT2000_BUS_MCA:
 743                                 case ACT2000_BUS_PCMCIA:
 744                                 default:
 745                                         printk(KERN_WARNING
 746                                                "act2000: addcard: Invalid BUS type %d\n",
 747                                                p->bus);
 748                         }
 749                 } else
 750                         /* Card already initialized */
 751                         initialized = 1;
 752                 if (initialized) {
 753                         /* Init OK, next card ... */
 754                         q = p;
 755                         p = p->next;
 756                 } else {
 757                         /* Init failed, remove card from list, free memory */
 758                         printk(KERN_WARNING
 759                                "act2000: Initialization of %s failed\n",
 760                                p->interface.id);
 761                         if (q) {
 762                                 q->next = p->next;
 763                                 kfree(p);
 764                                 p = q->next;
 765                         } else {
 766                                 cards = p->next;
 767                                 kfree(p);
 768                                 p = cards;
 769                         }
 770                         failed++;
 771                 }
 772         }
 773         return (added - failed);
 774 }
 775
 776 #define DRIVERNAME "IBM Active 2000 ISDN driver"
 777
 778 static int __init act2000_init(void)
 779 {
 780         printk(KERN_INFO "%s\n", DRIVERNAME);
 781         if (!cards)
 782                 act2000_addcard(act_bus, act_port, act_irq, act_id);
 783         if (!cards)
 784                 printk(KERN_INFO "act2000: No cards defined yet\n");
 785         return 0;
 786 }
 787
 788 static void __exit act2000_exit(void)
 789 {
 790         act2000_card *card = cards;
 791         act2000_card *last;
 792         while (card) {
 793                 unregister_card(card);
 794                 del_timer(&card->ptimer);
 795                 card = card->next;
 796         }
 797         card = cards;
 798         while (card) {
 799                 last = card;
 800                 card = card->next;
 801                 act2000_clear_msn(last);
 802                 kfree(last);
 803         }
 804         printk(KERN_INFO "%s unloaded\n", DRIVERNAME);
 805 }
 806
 807 module_init(act2000_init);
 808 module_exit(act2000_exit);