drivers/char/isicom.c

   1 /*
   2  *      This program is free software; you can redistribute it and/or
   3  *      modify it under the terms of the GNU General Public License
   4  *      as published by the Free Software Foundation; either version
   5  *      2 of the License, or (at your option) any later version.
   6  *
   7  *      Original driver code supplied by Multi-Tech
   8  *
   9  *      Changes
  10  *      1/9/98  alan@redhat.com         Merge to 2.0.x kernel tree
  11  *                                      Obtain and use official major/minors
  12  *                                      Loader switched to a misc device
  13  *                                      (fixed range check bug as a side effect)
  14  *                                      Printk clean up
  15  *      9/12/98 alan@redhat.com         Rough port to 2.1.x
  16  *
  17  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  18  *                                      a new unified driver.
  19  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  20  *                                      restore_flags on failure in
  21  *                                      isicom_send_break, verify put_user
  22  *                                      result
  23  *      ***********************************************************
  24  *
  25  *      To use this driver you also need the support package. You
  26  *      can find this in RPM format on
  27  *              ftp://ftp.linux.org.uk/pub/linux/alan
  28  *
  29  *      You can find the original tools for this direct from Multitech
  30  *              ftp://ftp.multitech.com/ISI-Cards/
  31  *
  32  *      Having installed the cards the module options (/etc/modprobe.conf)
  33  *
  34  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
  35  *
  36  *      Omit those entries for boards you don't have installed.
  37  *
  38  */
  39
  40 #include <linux/module.h>
  41 #include <linux/kernel.h>
  42 #include <linux/tty.h>
  43 #include <linux/termios.h>
  44 #include <linux/fs.h>
  45 #include <linux/sched.h>
  46 #include <linux/serial.h>
  47 #include <linux/mm.h>
  48 #include <linux/miscdevice.h>
  49 #include <linux/interrupt.h>
  50 #include <linux/timer.h>
  51 #include <linux/ioport.h>
  52
  53 #include <asm/uaccess.h>
  54 #include <asm/io.h>
  55 #include <asm/system.h>
  56
  57 #include <linux/pci.h>
  58
  59 #include <linux/isicom.h>
  60
  61 static struct pci_device_id isicom_pci_tbl[] = {
  62         { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  63         { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  64         { VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  65         { VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  66         { VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  67         { VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  68         { VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  69         { VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  70         { VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
  71         { 0 }
  72 };
  73 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
  74
  75 static int prev_card = 3;       /*      start servicing isi_card[0]     */
  76 static struct isi_board * irq_to_board[16];
  77 static struct tty_driver *isicom_normal;
  78
  79 static struct isi_board isi_card[BOARD_COUNT];
  80 static struct isi_port  isi_ports[PORT_COUNT];
  81
  82 static struct timer_list tx;
  83 static char re_schedule = 1;
  84 #ifdef ISICOM_DEBUG
  85 static unsigned long tx_count = 0;
  86 #endif
  87
  88 static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned  int cmd, unsigned long arg);
  89
  90 static void isicom_tx(unsigned long _data);
  91 static void isicom_start(struct tty_struct * tty);
  92
  93 static unsigned char * tmp_buf;
  94 static DECLARE_MUTEX(tmp_buf_sem);
  95
  96 /*   baud index mappings from linux defns to isi */
  97
  98 static signed char linuxb_to_isib[] = {
  99         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17,
 100         18, 19
 101 };
 102
 103 /*
 104  *  Firmware loader driver specific routines
 105  *
 106  */
 107
 108 static struct file_operations ISILoad_fops = {
 109         .owner          = THIS_MODULE,
 110         .ioctl          = ISILoad_ioctl,
 111 };
 112
 113 struct miscdevice isiloader_device = {
 114         ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops
 115 };
 116
 117
 118 static inline int WaitTillCardIsFree(unsigned short base)
 119 {
 120         unsigned long count=0;
 121         while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000));
 122         if (inw(base+0xe)&0x1)
 123                 return 0;
 124         else
 125                 return 1;
 126 }
 127
 128 static int ISILoad_ioctl(struct inode *inode, struct file *filp,
 129                          unsigned int cmd, unsigned long arg)
 130 {
 131         unsigned int card, i, j, signature, status, portcount = 0;
 132         unsigned long t;
 133         unsigned short word_count, base;
 134         bin_frame frame;
 135         void __user *argp = (void __user *)arg;
 136         /* exec_record exec_rec; */
 137
 138         if(get_user(card, (int __user *)argp))
 139                 return -EFAULT;
 140
 141         if(card < 0 || card >= BOARD_COUNT)
 142                 return -ENXIO;
 143
 144         base=isi_card[card].base;
 145
 146         if(base==0)
 147                 return -ENXIO;  /* disabled or not used */
 148
 149         switch(cmd) {
 150                 case MIOCTL_RESET_CARD:
 151                         if (!capable(CAP_SYS_ADMIN))
 152                                 return -EPERM;
 153                         printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base);
 154
 155                         inw(base+0x8);
 156
 157                         for(t=jiffies+HZ/100;time_before(jiffies, t););
 158
 159                         outw(0,base+0x8); /* Reset */
 160
 161                         for(j=1;j<=3;j++) {
 162                                 for(t=jiffies+HZ;time_before(jiffies, t););
 163                                 printk(".");
 164                         }
 165                         signature=(inw(base+0x4)) & 0xff;
 166                         if (isi_card[card].isa) {
 167
 168                                 if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) {
 169 #ifdef ISICOM_DEBUG
 170                                         printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
 171 #endif
 172                                         printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
 173                                         return -EIO;
 174                                 }
 175                         }
 176                         else {
 177                                 portcount = inw(base+0x2);
 178                                 if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) {
 179 #ifdef ISICOM_DEBUG
 180                                         printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
 181 #endif
 182                                         printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
 183                                         return -EIO;
 184                                 }
 185                         }
 186                         switch(signature) {
 187                         case    0xa5:
 188                         case    0xbb:
 189                         case    0xdd:
 190                                         if (isi_card[card].isa)
 191                                                 isi_card[card].port_count = 8;
 192                                         else {
 193                                                 if (portcount == 4)
 194                                                         isi_card[card].port_count = 4;
 195                                                 else
 196                                                         isi_card[card].port_count = 8;
 197                                         }
 198                                         isi_card[card].shift_count = 12;
 199                                         break;
 200
 201                         case    0xcc:   isi_card[card].port_count = 16;
 202                                         isi_card[card].shift_count = 11;
 203                                         break;
 204
 205                         default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
 206 #ifdef ISICOM_DEBUG
 207                                  printk("Sig=0x%x\n",signature);
 208 #endif
 209                                  return -EIO;
 210                         }
 211                         printk("-Done\n");
 212                         return put_user(signature,(unsigned __user *)argp);
 213
 214         case    MIOCTL_LOAD_FIRMWARE:
 215                         if (!capable(CAP_SYS_ADMIN))
 216                                 return -EPERM;
 217
 218                         if(copy_from_user(&frame, argp, sizeof(bin_frame)))
 219                                 return -EFAULT;
 220
 221                         if (WaitTillCardIsFree(base))
 222                                 return -EIO;
 223
 224                         outw(0xf0,base);        /* start upload sequence */
 225                         outw(0x00,base);
 226                         outw((frame.addr), base);/*      lsb of adderess    */
 227
 228                         word_count=(frame.count >> 1) + frame.count % 2;
 229                         outw(word_count, base);
 230                         InterruptTheCard(base);
 231
 232                         for(i=0;i<=0x2f;i++);   /* a wee bit of delay */
 233
 234                         if (WaitTillCardIsFree(base))
 235                                 return -EIO;
 236
 237                         if ((status=inw(base+0x4))!=0) {
 238                                 printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
 239                                 card+1, frame.addr, frame.count, status);
 240                                 return -EIO;
 241                         }
 242                         outsw(base, (void *) frame.bin_data, word_count);
 243
 244                         InterruptTheCard(base);
 245
 246                         for(i=0;i<=0x0f;i++);   /* another wee bit of delay */
 247
 248                         if (WaitTillCardIsFree(base))
 249                                 return -EIO;
 250
 251                         if ((status=inw(base+0x4))!=0) {
 252                                 printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status);
 253                                 return -EIO;
 254                         }
 255                         return 0;
 256
 257         case    MIOCTL_READ_FIRMWARE:
 258                         if (!capable(CAP_SYS_ADMIN))
 259                                 return -EPERM;
 260
 261                         if(copy_from_user(&frame, argp, sizeof(bin_header)))
 262                                 return -EFAULT;
 263
 264                         if (WaitTillCardIsFree(base))
 265                                 return -EIO;
 266
 267                         outw(0xf1,base);        /* start download sequence */
 268                         outw(0x00,base);
 269                         outw((frame.addr), base);/*      lsb of adderess    */
 270
 271                         word_count=(frame.count >> 1) + frame.count % 2;
 272                         outw(word_count+1, base);
 273                         InterruptTheCard(base);
 274
 275                         for(i=0;i<=0xf;i++);    /* a wee bit of delay */
 276
 277                         if (WaitTillCardIsFree(base))
 278                                 return -EIO;
 279
 280                         if ((status=inw(base+0x4))!=0) {
 281                                 printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
 282                                 card+1, frame.addr, frame.count, status);
 283                                 return -EIO;
 284                         }
 285
 286                         inw(base);
 287                         insw(base, frame.bin_data, word_count);
 288                         InterruptTheCard(base);
 289
 290                         for(i=0;i<=0x0f;i++);   /* another wee bit of delay */
 291
 292                         if (WaitTillCardIsFree(base))
 293                                 return -EIO;
 294
 295                         if ((status=inw(base+0x4))!=0) {
 296                                 printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status);
 297                                 return -EIO;
 298                         }
 299
 300                         if(copy_to_user(argp, &frame, sizeof(bin_frame)))
 301                                 return -EFAULT;
 302                         return 0;
 303
 304         case    MIOCTL_XFER_CTRL:
 305                         if (!capable(CAP_SYS_ADMIN))
 306                                 return -EPERM;
 307                         if (WaitTillCardIsFree(base))
 308                                 return -EIO;
 309
 310                         outw(0xf2, base);
 311                         outw(0x800, base);
 312                         outw(0x0, base);
 313                         outw(0x0, base);
 314                         InterruptTheCard(base);
 315                         outw(0x0, base+0x4);    /* for ISI4608 cards */
 316
 317                         isi_card[card].status |= FIRMWARE_LOADED;
 318                         return 0;
 319
 320         default:
 321 #ifdef ISICOM_DEBUG
 322                 printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd);
 323 #endif
 324                 return -ENOIOCTLCMD;
 325
 326         }
 327
 328 }
 329
 330
 331 /*
 332  *      ISICOM Driver specific routines ...
 333  *
 334  */
 335
 336 static inline int isicom_paranoia_check(struct isi_port const * port, char *name,
 337                                         const char * routine)
 338 {
 339 #ifdef ISICOM_DEBUG
 340         static const char * badmagic =
 341                         KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n";
 342         static const char * badport =
 343                         KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n";
 344         if (!port) {
 345                 printk(badport, name, routine);
 346                 return 1;
 347         }
 348         if (port->magic != ISICOM_MAGIC) {
 349                 printk(badmagic, name, routine);
 350                 return 1;
 351         }
 352 #endif
 353         return 0;
 354 }
 355
 356 /*      Transmitter     */
 357
 358 static void isicom_tx(unsigned long _data)
 359 {
 360         short count = (BOARD_COUNT-1), card, base;
 361         short txcount, wait, wrd, residue, word_count, cnt;
 362         struct isi_port * port;
 363         struct tty_struct * tty;
 364         unsigned long flags;
 365
 366 #ifdef ISICOM_DEBUG
 367         ++tx_count;
 368 #endif
 369
 370         /*      find next active board  */
 371         card = (prev_card + 1) & 0x0003;
 372         while(count-- > 0) {
 373                 if (isi_card[card].status & BOARD_ACTIVE)
 374                         break;
 375                 card = (card + 1) & 0x0003;
 376         }
 377         if (!(isi_card[card].status & BOARD_ACTIVE))
 378                 goto sched_again;
 379
 380         prev_card = card;
 381
 382         count = isi_card[card].port_count;
 383         port = isi_card[card].ports;
 384         base = isi_card[card].base;
 385         for (;count > 0;count--, port++) {
 386                 /* port not active or tx disabled to force flow control */
 387                 if (!(port->status & ISI_TXOK))
 388                         continue;
 389
 390                 tty = port->tty;
 391                 save_flags(flags); cli();
 392                 txcount = MIN(TX_SIZE, port->xmit_cnt);
 393                 if ((txcount <= 0) || tty->stopped || tty->hw_stopped) {
 394                         restore_flags(flags);
 395                         continue;
 396                 }
 397                 wait = 200;
 398                 while(((inw(base+0x0e) & 0x01) == 0) && (wait-- > 0));
 399                 if (wait <= 0) {
 400                         restore_flags(flags);
 401 #ifdef ISICOM_DEBUG
 402                         printk(KERN_DEBUG "ISICOM: isicom_tx:Card(0x%x) found busy.\n",
 403                                 card);
 404 #endif
 405                         continue;
 406                 }
 407                 if (!(inw(base + 0x02) & (1 << port->channel))) {
 408                         restore_flags(flags);
 409 #ifdef ISICOM_DEBUG
 410                         printk(KERN_DEBUG "ISICOM: isicom_tx: cannot tx to 0x%x:%d.\n",
 411                                         base, port->channel + 1);
 412 #endif
 413                         continue;
 414                 }
 415 #ifdef ISICOM_DEBUG
 416                 printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n",
 417                                 txcount, port->channel+1);
 418 #endif
 419                 outw((port->channel << isi_card[card].shift_count) | txcount
 420                                         , base);
 421                 residue = NO;
 422                 wrd = 0;
 423                 while (1) {
 424                         cnt = MIN(txcount, (SERIAL_XMIT_SIZE - port->xmit_tail));
 425                         if (residue == YES) {
 426                                 residue = NO;
 427                                 if (cnt > 0) {
 428                                         wrd |= (port->xmit_buf[port->xmit_tail] << 8);
 429                                         port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
 430                                         port->xmit_cnt--;
 431                                         txcount--;
 432                                         cnt--;
 433                                         outw(wrd, base);
 434                                 }
 435                                 else {
 436                                         outw(wrd, base);
 437                                         break;
 438                                 }
 439                         }
 440                         if (cnt <= 0) break;
 441                         word_count = cnt >> 1;
 442                         outsw(base, port->xmit_buf+port->xmit_tail, word_count);
 443                         port->xmit_tail = (port->xmit_tail + (word_count << 1)) &
 444                                                 (SERIAL_XMIT_SIZE - 1);
 445                         txcount -= (word_count << 1);
 446                         port->xmit_cnt -= (word_count << 1);
 447                         if (cnt & 0x0001) {
 448                                 residue = YES;
 449                                 wrd = port->xmit_buf[port->xmit_tail];
 450                                 port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
 451                                 port->xmit_cnt--;
 452                                 txcount--;
 453                         }
 454                 }
 455
 456                 InterruptTheCard(base);
 457                 if (port->xmit_cnt <= 0)
 458                         port->status &= ~ISI_TXOK;
 459                 if (port->xmit_cnt <= WAKEUP_CHARS)
 460                         schedule_work(&port->bh_tqueue);
 461                 restore_flags(flags);
 462         }
 463
 464                 /*      schedule another tx for hopefully in about 10ms */
 465 sched_again:
 466         if (!re_schedule)
 467                 return;
 468         init_timer(&tx);
 469         tx.expires = jiffies + HZ/100;
 470         tx.data = 0;
 471         tx.function = isicom_tx;
 472         add_timer(&tx);
 473
 474         return;
 475 }
 476
 477 /*      Interrupt handlers      */
 478
 479
 480 static void isicom_bottomhalf(void * data)
 481 {
 482         struct isi_port * port = (struct isi_port *) data;
 483         struct tty_struct * tty = port->tty;
 484
 485         if (!tty)
 486                 return;
 487
 488         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 489             tty->ldisc.write_wakeup)
 490                 (tty->ldisc.write_wakeup)(tty);
 491         wake_up_interruptible(&tty->write_wait);
 492 }
 493
 494 /* main interrupt handler routine */
 495 static irqreturn_t isicom_interrupt(int irq, void *dev_id,
 496                                         struct pt_regs *regs)
 497 {
 498         struct isi_board * card;
 499         struct isi_port * port;
 500         struct tty_struct * tty;
 501         unsigned short base, header, word_count, count;
 502         unsigned char channel;
 503         short byte_count;
 504
 505         /*
 506          *      find the source of interrupt
 507          */
 508
 509         for(count = 0; count < BOARD_COUNT; count++) {
 510                 card = &isi_card[count];
 511                 if (card->base != 0) {
 512                         if (((card->isa == YES) && (card->irq == irq)) ||
 513                                 ((card->isa == NO) && (card->irq == irq) && (inw(card->base+0x0e) & 0x02)))
 514                                 break;
 515                 }
 516                 card = NULL;
 517         }
 518
 519         if (!card || !(card->status & FIRMWARE_LOADED)) {
 520 /*              printk(KERN_DEBUG "ISICOM: interrupt: not handling irq%d!.\n", irq);*/
 521                 return IRQ_NONE;
 522         }
 523
 524         base = card->base;
 525         if (card->isa == NO) {
 526         /*
 527          *      disable any interrupts from the PCI card and lower the
 528          *      interrupt line
 529          */
 530                 outw(0x8000, base+0x04);
 531                 ClearInterrupt(base);
 532         }
 533
 534         inw(base);              /* get the dummy word out */
 535         header = inw(base);
 536         channel = (header & 0x7800) >> card->shift_count;
 537         byte_count = header & 0xff;
 538 #ifdef ISICOM_DEBUG
 539         printk(KERN_DEBUG "ISICOM:Intr:(0x%x:%d).\n", base, channel+1);
 540 #endif
 541         if ((channel+1) > card->port_count) {
 542                 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n",
 543                                 base, channel+1);
 544                 if (card->isa)
 545                         ClearInterrupt(base);
 546                 else
 547                         outw(0x0000, base+0x04); /* enable interrupts */
 548                 return IRQ_HANDLED;
 549         }
 550         port = card->ports + channel;
 551         if (!(port->flags & ASYNC_INITIALIZED)) {
 552                 if (card->isa)
 553                         ClearInterrupt(base);
 554                 else
 555                         outw(0x0000, base+0x04); /* enable interrupts */
 556                 return IRQ_HANDLED;
 557         }
 558
 559         tty = port->tty;
 560
 561         if (header & 0x8000) {          /* Status Packet */
 562                 header = inw(base);
 563                 switch(header & 0xff) {
 564                         case 0: /* Change in EIA signals */
 565
 566                                 if (port->flags & ASYNC_CHECK_CD) {
 567                                         if (port->status & ISI_DCD) {
 568                                                 if (!(header & ISI_DCD)) {
 569                                                 /* Carrier has been lost  */
 570 #ifdef ISICOM_DEBUG
 571                                                         printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n");
 572 #endif
 573                                                         port->status &= ~ISI_DCD;
 574                                                         schedule_work(&port->hangup_tq);
 575                                                 }
 576                                         }
 577                                         else {
 578                                                 if (header & ISI_DCD) {
 579                                                 /* Carrier has been detected */
 580 #ifdef ISICOM_DEBUG
 581                                                         printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n");
 582 #endif
 583                                                         port->status |= ISI_DCD;
 584                                                         wake_up_interruptible(&port->open_wait);
 585                                                 }
 586                                         }
 587                                 }
 588                                 else {
 589                                         if (header & ISI_DCD)
 590                                                 port->status |= ISI_DCD;
 591                                         else
 592                                                 port->status &= ~ISI_DCD;
 593                                 }
 594
 595                                 if (port->flags & ASYNC_CTS_FLOW) {
 596                                         if (port->tty->hw_stopped) {
 597                                                 if (header & ISI_CTS) {
 598                                                         port->tty->hw_stopped = 0;
 599                                                         /* start tx ing */
 600                                                         port->status |= (ISI_TXOK | ISI_CTS);
 601                                                         schedule_work(&port->bh_tqueue);
 602                                                 }
 603                                         }
 604                                         else {
 605                                                 if (!(header & ISI_CTS)) {
 606                                                         port->tty->hw_stopped = 1;
 607                                                         /* stop tx ing */
 608                                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 609                                                 }
 610                                         }
 611                                 }
 612                                 else {
 613                                         if (header & ISI_CTS)
 614                                                 port->status |= ISI_CTS;
 615                                         else
 616                                                 port->status &= ~ISI_CTS;
 617                                 }
 618
 619                                 if (header & ISI_DSR)
 620                                         port->status |= ISI_DSR;
 621                                 else
 622                                         port->status &= ~ISI_DSR;
 623
 624                                 if (header & ISI_RI)
 625                                         port->status |= ISI_RI;
 626                                 else
 627                                         port->status &= ~ISI_RI;
 628
 629                                 break;
 630
 631                         case 1: /* Received Break !!!    */
 632                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 633                                         break;
 634                                 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
 635                                 /* dunno if this is right */
 636                                 *tty->flip.char_buf_ptr++ = 0;
 637                                 tty->flip.count++;
 638                                 if (port->flags & ASYNC_SAK)
 639                                         do_SAK(tty);
 640                                 schedule_delayed_work(&tty->flip.work, 1);
 641                                 break;
 642
 643                         case 2: /* Statistics            */
 644                                 printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n");
 645                                 break;
 646
 647                         default:
 648                                 printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n");
 649                                 break;
 650                 }
 651         }
 652         else {                          /* Data   Packet */
 653                 count = MIN(byte_count, (TTY_FLIPBUF_SIZE - tty->flip.count));
 654 #ifdef ISICOM_DEBUG
 655                 printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n",
 656                                         count, byte_count);
 657 #endif
 658                 word_count = count >> 1;
 659                 insw(base, tty->flip.char_buf_ptr, word_count);
 660                 tty->flip.char_buf_ptr += (word_count << 1);
 661                 byte_count -= (word_count << 1);
 662                 if (count & 0x0001) {
 663                         *tty->flip.char_buf_ptr++ = (char)(inw(base) & 0xff);
 664                         byte_count -= 2;
 665                 }
 666                 memset(tty->flip.flag_buf_ptr, 0, count);
 667                 tty->flip.flag_buf_ptr += count;
 668                 tty->flip.count += count;
 669
 670                 if (byte_count > 0) {
 671                         printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n",
 672                                         base, channel+1);
 673                         while(byte_count > 0) { /* drain out unread xtra data */
 674                                 inw(base);
 675                                 byte_count -= 2;
 676                         }
 677                 }
 678                 schedule_delayed_work(&tty->flip.work, 1);
 679         }
 680         if (card->isa == YES)
 681                 ClearInterrupt(base);
 682         else
 683                 outw(0x0000, base+0x04); /* enable interrupts */
 684         return IRQ_HANDLED;
 685 }
 686
 687  /* called with interrupts disabled */
 688 static void isicom_config_port(struct isi_port * port)
 689 {
 690         struct isi_board * card = port->card;
 691         struct tty_struct * tty;
 692         unsigned long baud;
 693         unsigned short channel_setup, wait, base = card->base;
 694         unsigned short channel = port->channel, shift_count = card->shift_count;
 695         unsigned char flow_ctrl;
 696
 697         if (!(tty = port->tty) || !tty->termios)
 698                 return;
 699         baud = C_BAUD(tty);
 700         if (baud & CBAUDEX) {
 701                 baud &= ~CBAUDEX;
 702
 703                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 704                  *  then the card is programmed for 57.6Kbps or 115Kbps
 705                  *  respectively.
 706                  */
 707
 708                 if (baud < 1 || baud > 2)
 709                         port->tty->termios->c_cflag &= ~CBAUDEX;
 710                 else
 711                         baud += 15;
 712         }
 713         if (baud == 15) {
 714
 715                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 716                  *  by the set_serial_info ioctl ... this is done by
 717                  *  the 'setserial' utility.
 718                  */
 719
 720                 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 721                         baud++;     /*  57.6 Kbps */
 722                 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 723                         baud +=2;   /*  115  Kbps */
 724         }
 725         if (linuxb_to_isib[baud] == -1) {
 726                 /* hang up */
 727                 drop_dtr(port);
 728                 return;
 729         }
 730         else
 731                 raise_dtr(port);
 732
 733         wait = 100;
 734         while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
 735         if (!wait) {
 736                 printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at channel setup.\n");
 737                 return;
 738         }
 739         outw(0x8000 | (channel << shift_count) |0x03, base);
 740         outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 741         channel_setup = 0;
 742         switch(C_CSIZE(tty)) {
 743                 case CS5:
 744                         channel_setup |= ISICOM_CS5;
 745                         break;
 746                 case CS6:
 747                         channel_setup |= ISICOM_CS6;
 748                         break;
 749                 case CS7:
 750                         channel_setup |= ISICOM_CS7;
 751                         break;
 752                 case CS8:
 753                         channel_setup |= ISICOM_CS8;
 754                         break;
 755         }
 756
 757         if (C_CSTOPB(tty))
 758                 channel_setup |= ISICOM_2SB;
 759
 760         if (C_PARENB(tty))
 761                 channel_setup |= ISICOM_EVPAR;
 762         if (C_PARODD(tty))
 763                 channel_setup |= ISICOM_ODPAR;
 764         outw(channel_setup, base);
 765         InterruptTheCard(base);
 766
 767         if (C_CLOCAL(tty))
 768                 port->flags &= ~ASYNC_CHECK_CD;
 769         else
 770                 port->flags |= ASYNC_CHECK_CD;
 771
 772         /* flow control settings ...*/
 773         flow_ctrl = 0;
 774         port->flags &= ~ASYNC_CTS_FLOW;
 775         if (C_CRTSCTS(tty)) {
 776                 port->flags |= ASYNC_CTS_FLOW;
 777                 flow_ctrl |= ISICOM_CTSRTS;
 778         }
 779         if (I_IXON(tty))
 780                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 781         if (I_IXOFF(tty))
 782                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 783
 784         wait = 100;
 785         while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
 786         if (!wait) {
 787                 printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at flow setup.\n");
 788                 return;
 789         }
 790         outw(0x8000 | (channel << shift_count) |0x04, base);
 791         outw(flow_ctrl << 8 | 0x05, base);
 792         outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 793         InterruptTheCard(base);
 794
 795         /*      rx enabled -> enable port for rx on the card    */
 796         if (C_CREAD(tty)) {
 797                 card->port_status |= (1 << channel);
 798                 outw(card->port_status, base + 0x02);
 799         }
 800
 801 }
 802
 803 /* open et all */
 804
 805 static inline void isicom_setup_board(struct isi_board * bp)
 806 {
 807         int channel;
 808         struct isi_port * port;
 809         unsigned long flags;
 810
 811         if (bp->status & BOARD_ACTIVE)
 812                 return;
 813         port = bp->ports;
 814 #ifdef ISICOM_DEBUG
 815         printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts start, port_count %d...\n", bp->port_count);
 816 #endif
 817         for(channel = 0; channel < bp->port_count; channel++, port++) {
 818                 save_flags(flags); cli();
 819                 drop_dtr_rts(port);
 820                 restore_flags(flags);
 821         }
 822 #ifdef ISICOM_DEBUG
 823         printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts stop...\n");
 824 #endif
 825
 826         bp->status |= BOARD_ACTIVE;
 827         return;
 828 }
 829
 830 static int isicom_setup_port(struct isi_port * port)
 831 {
 832         struct isi_board * card = port->card;
 833         unsigned long flags;
 834
 835         if (port->flags & ASYNC_INITIALIZED)
 836                 return 0;
 837         if (!port->xmit_buf) {
 838                 unsigned long page;
 839
 840                 if (!(page = get_zeroed_page(GFP_KERNEL)))
 841                         return -ENOMEM;
 842
 843                 if (port->xmit_buf) {
 844                         free_page(page);
 845                         return -ERESTARTSYS;
 846                 }
 847                 port->xmit_buf = (unsigned char *) page;
 848         }
 849         save_flags(flags); cli();
 850         if (port->tty)
 851                 clear_bit(TTY_IO_ERROR, &port->tty->flags);
 852         if (port->count == 1)
 853                 card->count++;
 854
 855         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 856
 857         /*      discard any residual data       */
 858         kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX);
 859
 860         isicom_config_port(port);
 861         port->flags |= ASYNC_INITIALIZED;
 862
 863         restore_flags(flags);
 864
 865         return 0;
 866 }
 867
 868 static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port)
 869 {
 870         int do_clocal = 0, retval;
 871         DECLARE_WAITQUEUE(wait, current);
 872
 873         /* block if port is in the process of being closed */
 874
 875         if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
 876 #ifdef ISICOM_DEBUG
 877                 printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n");
 878 #endif
 879                 interruptible_sleep_on(&port->close_wait);
 880                 if (port->flags & ASYNC_HUP_NOTIFY)
 881                         return -EAGAIN;
 882                 else
 883                         return -ERESTARTSYS;
 884         }
 885
 886         /* if non-blocking mode is set ... */
 887
 888         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
 889 #ifdef ISICOM_DEBUG
 890                 printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n");
 891 #endif
 892                 port->flags |= ASYNC_NORMAL_ACTIVE;
 893                 return 0;
 894         }
 895
 896         if (C_CLOCAL(tty))
 897                 do_clocal = 1;
 898 #ifdef ISICOM_DEBUG
 899         if (do_clocal)
 900                 printk(KERN_DEBUG "ISICOM: block_til_ready: CLOCAL set.\n");
 901 #endif
 902
 903         /* block waiting for DCD to be asserted, and while
 904                                                 callout dev is busy */
 905         retval = 0;
 906         add_wait_queue(&port->open_wait, &wait);
 907         cli();
 908                 if (!tty_hung_up_p(filp))
 909                         port->count--;
 910         sti();
 911         port->blocked_open++;
 912 #ifdef ISICOM_DEBUG
 913         printk(KERN_DEBUG "ISICOM: block_til_ready: waiting for DCD...\n");
 914 #endif
 915         while (1) {
 916                 cli();
 917                 raise_dtr_rts(port);
 918                 sti();
 919                 set_current_state(TASK_INTERRUPTIBLE);
 920                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 921                         if (port->flags & ASYNC_HUP_NOTIFY)
 922                                 retval = -EAGAIN;
 923                         else
 924                                 retval = -ERESTARTSYS;
 925 #ifdef ISICOM_DEBUG
 926                         printk(KERN_DEBUG "ISICOM: block_til_ready: tty_hung_up_p || not init.\n");
 927 #endif
 928                         break;
 929                 }
 930                 if (!(port->flags & ASYNC_CLOSING) &&
 931                     (do_clocal || (port->status & ISI_DCD))) {
 932 #ifdef ISICOM_DEBUG
 933                         printk(KERN_DEBUG "ISICOM: block_til_ready: do_clocal || DCD.\n");
 934 #endif
 935                         break;
 936                 }
 937                 if (signal_pending(current)) {
 938 #ifdef ISICOM_DEBUG
 939                         printk(KERN_DEBUG "ISICOM: block_til_ready: sig blocked.\n");
 940 #endif
 941                         retval = -ERESTARTSYS;
 942                         break;
 943                 }
 944                 schedule();
 945         }
 946         set_current_state(TASK_RUNNING);
 947         remove_wait_queue(&port->open_wait, &wait);
 948         if (!tty_hung_up_p(filp))
 949                 port->count++;
 950         port->blocked_open--;
 951         if (retval)
 952                 return retval;
 953         port->flags |= ASYNC_NORMAL_ACTIVE;
 954         return 0;
 955 }
 956
 957 static int isicom_open(struct tty_struct * tty, struct file * filp)
 958 {
 959         struct isi_port * port;
 960         struct isi_board * card;
 961         unsigned int line, board;
 962         int error;
 963
 964 #ifdef ISICOM_DEBUG
 965         printk(KERN_DEBUG "ISICOM: open start!!!.\n");
 966 #endif
 967         line = tty->index;
 968
 969 #ifdef ISICOM_DEBUG
 970         printk(KERN_DEBUG "line = %d.\n", line);
 971 #endif
 972
 973         if ((line < 0) || (line > (PORT_COUNT-1)))
 974                 return -ENODEV;
 975         board = BOARD(line);
 976
 977 #ifdef ISICOM_DEBUG
 978         printk(KERN_DEBUG "board = %d.\n", board);
 979 #endif
 980
 981         card = &isi_card[board];
 982         if (!(card->status & FIRMWARE_LOADED)) {
 983 #ifdef ISICOM_DEBUG
 984                 printk(KERN_DEBUG"ISICOM: Firmware not loaded to card%d.\n", board);
 985 #endif
 986                 return -ENODEV;
 987         }
 988
 989         /*  open on a port greater than the port count for the card !!! */
 990         if (line > ((board * 16) + card->port_count - 1)) {
 991                 printk(KERN_ERR "ISICOM: Open on a port which exceeds the port_count of the card!\n");
 992                 return -ENODEV;
 993         }
 994         port = &isi_ports[line];
 995         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 996                 return -ENODEV;
 997
 998 #ifdef ISICOM_DEBUG
 999         printk(KERN_DEBUG "ISICOM: isicom_setup_board ...\n");
1000 #endif
1001         isicom_setup_board(card);
1002
1003         port->count++;
1004         tty->driver_data = port;
1005         port->tty = tty;
1006 #ifdef ISICOM_DEBUG
1007         printk(KERN_DEBUG "ISICOM: isicom_setup_port ...\n");
1008 #endif
1009         if ((error = isicom_setup_port(port))!=0)
1010                 return error;
1011 #ifdef ISICOM_DEBUG
1012         printk(KERN_DEBUG "ISICOM: block_til_ready ...\n");
1013 #endif
1014         if ((error = block_til_ready(tty, filp, port))!=0)
1015                 return error;
1016
1017 #ifdef ISICOM_DEBUG
1018         printk(KERN_DEBUG "ISICOM: open end!!!.\n");
1019 #endif
1020         return 0;
1021 }
1022
1023 /* close et all */
1024
1025 static inline void isicom_shutdown_board(struct isi_board * bp)
1026 {
1027         int channel;
1028         struct isi_port * port;
1029
1030         if (!(bp->status & BOARD_ACTIVE))
1031                 return;
1032         bp->status &= ~BOARD_ACTIVE;
1033         port = bp->ports;
1034         for(channel = 0; channel < bp->port_count; channel++, port++) {
1035                 drop_dtr_rts(port);
1036         }
1037 }
1038
1039 static void isicom_shutdown_port(struct isi_port * port)
1040 {
1041         struct isi_board * card = port->card;
1042         struct tty_struct * tty;
1043
1044         if (!(port->flags & ASYNC_INITIALIZED))
1045                 return;
1046         if (port->xmit_buf) {
1047                 free_page((unsigned long) port->xmit_buf);
1048                 port->xmit_buf = NULL;
1049         }
1050         if (!(tty = port->tty) || C_HUPCL(tty))
1051                 /* drop dtr on this port */
1052                 drop_dtr(port);
1053
1054         /* any other port uninits  */
1055
1056         if (tty)
1057                 set_bit(TTY_IO_ERROR, &tty->flags);
1058         port->flags &= ~ASYNC_INITIALIZED;
1059
1060         if (--card->count < 0) {
1061                 printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%x) count %d.\n",
1062                         card->base, card->count);
1063                 card->count = 0;
1064         }
1065
1066         /* last port was closed , shutdown that boad too */
1067         if (!card->count)
1068                 isicom_shutdown_board(card);
1069 }
1070
1071 static void isicom_close(struct tty_struct * tty, struct file * filp)
1072 {
1073         struct isi_port * port = (struct isi_port *) tty->driver_data;
1074         struct isi_board * card = port->card;
1075         unsigned long flags;
1076
1077         if (!port)
1078                 return;
1079         if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1080                 return;
1081
1082 #ifdef ISICOM_DEBUG
1083         printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
1084 #endif
1085
1086         save_flags(flags); cli();
1087         if (tty_hung_up_p(filp)) {
1088                 restore_flags(flags);
1089                 return;
1090         }
1091
1092         if ((tty->count == 1) && (port->count != 1)) {
1093                 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count"
1094                         "tty->count = 1 port count = %d.\n",
1095                         card->base, port->count);
1096                 port->count = 1;
1097         }
1098         if (--port->count < 0) {
1099                 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count for"
1100                         "channel%d = %d", card->base, port->channel,
1101                         port->count);
1102                 port->count = 0;
1103         }
1104
1105         if (port->count) {
1106                 restore_flags(flags);
1107                 return;
1108         }
1109         port->flags |= ASYNC_CLOSING;
1110         tty->closing = 1;
1111         if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1112                 tty_wait_until_sent(tty, port->closing_wait);
1113         /* indicate to the card that no more data can be received
1114            on this port */
1115         if (port->flags & ASYNC_INITIALIZED) {
1116                 card->port_status &= ~(1 << port->channel);
1117                 outw(card->port_status, card->base + 0x02);
1118         }
1119         isicom_shutdown_port(port);
1120         if (tty->driver->flush_buffer)
1121                 tty->driver->flush_buffer(tty);
1122         if (tty->ldisc.flush_buffer)
1123                 tty->ldisc.flush_buffer(tty);
1124         tty->closing = 0;
1125         port->tty = NULL;
1126         if (port->blocked_open) {
1127                 if (port->close_delay) {
1128                         set_current_state(TASK_INTERRUPTIBLE);
1129 #ifdef ISICOM_DEBUG
1130                         printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
1131 #endif
1132                         schedule_timeout(port->close_delay);
1133                 }
1134                 wake_up_interruptible(&port->open_wait);
1135         }
1136         port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1137         wake_up_interruptible(&port->close_wait);
1138         restore_flags(flags);
1139 #ifdef ISICOM_DEBUG
1140         printk(KERN_DEBUG "ISICOM: Close end!!!.\n");
1141 #endif
1142 }
1143
1144 /* write et all */
1145 static int isicom_write(struct tty_struct * tty, int from_user,
1146                         const unsigned char * buf, int count)
1147 {
1148         struct isi_port * port = (struct isi_port *) tty->driver_data;
1149         unsigned long flags;
1150         int cnt, total = 0;
1151 #ifdef ISICOM_DEBUG
1152         printk(KERN_DEBUG "ISICOM: isicom_write for port%d: %d bytes.\n",
1153                         port->channel+1, count);
1154 #endif
1155         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1156                 return 0;
1157
1158         if (!tty || !port->xmit_buf || !tmp_buf)
1159                 return 0;
1160         if (from_user)
1161                 down(&tmp_buf_sem); /* acquire xclusive access to tmp_buf */
1162
1163         save_flags(flags);
1164         while(1) {
1165                 cli();
1166                 cnt = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1167                         SERIAL_XMIT_SIZE - port->xmit_head));
1168                 if (cnt <= 0)
1169                         break;
1170
1171                 if (from_user) {
1172                         /* the following may block for paging... hence
1173                            enabling interrupts but tx routine may have
1174                            created more space in xmit_buf when the ctrl
1175                            gets back here  */
1176                         sti();
1177                         if (copy_from_user(tmp_buf, buf, cnt)) {
1178                                 up(&tmp_buf_sem);
1179                                 restore_flags(flags);
1180                                 return -EFAULT;
1181                         }
1182                         cli();
1183                         cnt = MIN(cnt, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1184                         SERIAL_XMIT_SIZE - port->xmit_head));
1185                         memcpy(port->xmit_buf + port->xmit_head, tmp_buf, cnt);
1186                 }
1187                 else
1188                         memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1189                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1);
1190                 port->xmit_cnt += cnt;
1191                 restore_flags(flags);
1192                 buf += cnt;
1193                 count -= cnt;
1194                 total += cnt;
1195         }
1196         if (from_user)
1197                 up(&tmp_buf_sem);
1198         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1199                 port->status |= ISI_TXOK;
1200         restore_flags(flags);
1201 #ifdef ISICOM_DEBUG
1202         printk(KERN_DEBUG "ISICOM: isicom_write %d bytes written.\n", total);
1203 #endif
1204         return total;
1205 }
1206
1207 /* put_char et all */
1208 static void isicom_put_char(struct tty_struct * tty, unsigned char ch)
1209 {
1210         struct isi_port * port = (struct isi_port *) tty->driver_data;
1211         unsigned long flags;
1212
1213         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1214                 return;
1215
1216         if (!tty || !port->xmit_buf)
1217                 return;
1218 #ifdef ISICOM_DEBUG
1219         printk(KERN_DEBUG "ISICOM: put_char, port %d, char %c.\n", port->channel+1, ch);
1220 #endif
1221
1222         save_flags(flags); cli();
1223
1224         if (port->xmit_cnt >= (SERIAL_XMIT_SIZE - 1)) {
1225                 restore_flags(flags);
1226                 return;
1227         }
1228
1229         port->xmit_buf[port->xmit_head++] = ch;
1230         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1231         port->xmit_cnt++;
1232         restore_flags(flags);
1233 }
1234
1235 /* flush_chars et all */
1236 static void isicom_flush_chars(struct tty_struct * tty)
1237 {
1238         struct isi_port * port = (struct isi_port *) tty->driver_data;
1239
1240         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1241                 return;
1242
1243         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1244             !port->xmit_buf)
1245                 return;
1246
1247         /* this tells the transmitter to consider this port for
1248            data output to the card ... that's the best we can do. */
1249         port->status |= ISI_TXOK;
1250 }
1251
1252 /* write_room et all */
1253 static int isicom_write_room(struct tty_struct * tty)
1254 {
1255         struct isi_port * port = (struct isi_port *) tty->driver_data;
1256         int free;
1257         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1258                 return 0;
1259
1260         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1261         if (free < 0)
1262                 free = 0;
1263         return free;
1264 }
1265
1266 /* chars_in_buffer et all */
1267 static int isicom_chars_in_buffer(struct tty_struct * tty)
1268 {
1269         struct isi_port * port = (struct isi_port *) tty->driver_data;
1270         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1271                 return 0;
1272         return port->xmit_cnt;
1273 }
1274
1275 /* ioctl et all */
1276 static inline void isicom_send_break(struct isi_port * port, unsigned long length)
1277 {
1278         struct isi_board * card = port->card;
1279         short wait = 10;
1280         unsigned short base = card->base;
1281         unsigned long flags;
1282
1283         save_flags(flags); cli();
1284         while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
1285         if (!wait) {
1286                 printk(KERN_DEBUG "ISICOM: Card found busy in isicom_send_break.\n");
1287                 goto out;
1288         }
1289         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1290         outw((length & 0xff) << 8 | 0x00, base);
1291         outw((length & 0xff00), base);
1292         InterruptTheCard(base);
1293 out:    restore_flags(flags);
1294 }
1295
1296 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1297 {
1298         struct isi_port * port = (struct isi_port *) tty->driver_data;
1299         /* just send the port status */
1300         unsigned short status = port->status;
1301
1302         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1303                 return -ENODEV;
1304
1305         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1306                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1307                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1308                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1309                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1310                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1311 }
1312
1313 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1314                            unsigned int set, unsigned int clear)
1315 {
1316         struct isi_port * port = (struct isi_port *) tty->driver_data;
1317         unsigned long flags;
1318
1319         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1320                 return -ENODEV;
1321
1322         save_flags(flags); cli();
1323         if (set & TIOCM_RTS)
1324                 raise_rts(port);
1325         if (set & TIOCM_DTR)
1326                 raise_dtr(port);
1327
1328         if (clear & TIOCM_RTS)
1329                 drop_rts(port);
1330         if (clear & TIOCM_DTR)
1331                 drop_dtr(port);
1332
1333         restore_flags(flags);
1334         return 0;
1335 }
1336
1337 static int isicom_set_serial_info(struct isi_port * port,
1338                                         struct serial_struct __user *info)
1339 {
1340         struct serial_struct newinfo;
1341         unsigned long flags;
1342         int reconfig_port;
1343
1344         if(copy_from_user(&newinfo, info, sizeof(newinfo)))
1345                 return -EFAULT;
1346
1347         reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1348                          (newinfo.flags & ASYNC_SPD_MASK));
1349
1350         if (!capable(CAP_SYS_ADMIN)) {
1351                 if ((newinfo.close_delay != port->close_delay) ||
1352                     (newinfo.closing_wait != port->closing_wait) ||
1353                     ((newinfo.flags & ~ASYNC_USR_MASK) !=
1354                      (port->flags & ~ASYNC_USR_MASK)))
1355                         return -EPERM;
1356                 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1357                                 (newinfo.flags & ASYNC_USR_MASK));
1358         }
1359         else {
1360                 port->close_delay = newinfo.close_delay;
1361                 port->closing_wait = newinfo.closing_wait;
1362                 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1363                                 (newinfo.flags & ASYNC_FLAGS));
1364         }
1365         if (reconfig_port) {
1366                 save_flags(flags); cli();
1367                 isicom_config_port(port);
1368                 restore_flags(flags);
1369         }
1370         return 0;
1371 }
1372
1373 static int isicom_get_serial_info(struct isi_port * port,
1374                                         struct serial_struct __user *info)
1375 {
1376         struct serial_struct out_info;
1377
1378         memset(&out_info, 0, sizeof(out_info));
1379 /*      out_info.type = ? */
1380         out_info.line = port - isi_ports;
1381         out_info.port = port->card->base;
1382         out_info.irq = port->card->irq;
1383         out_info.flags = port->flags;
1384 /*      out_info.baud_base = ? */
1385         out_info.close_delay = port->close_delay;
1386         out_info.closing_wait = port->closing_wait;
1387         if(copy_to_user(info, &out_info, sizeof(out_info)))
1388                 return -EFAULT;
1389         return 0;
1390 }
1391
1392 static int isicom_ioctl(struct tty_struct * tty, struct file * filp,
1393                         unsigned int cmd, unsigned long arg)
1394 {
1395         struct isi_port * port = (struct isi_port *) tty->driver_data;
1396         void __user *argp = (void __user *)arg;
1397         int retval;
1398
1399         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1400                 return -ENODEV;
1401
1402         switch(cmd) {
1403                 case TCSBRK:
1404                         retval = tty_check_change(tty);
1405                         if (retval)
1406                                 return retval;
1407                         tty_wait_until_sent(tty, 0);
1408                         if (!arg)
1409                                 isicom_send_break(port, HZ/4);
1410                         return 0;
1411
1412                 case TCSBRKP:
1413                         retval = tty_check_change(tty);
1414                         if (retval)
1415                                 return retval;
1416                         tty_wait_until_sent(tty, 0);
1417                         isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1418                         return 0;
1419
1420                 case TIOCGSOFTCAR:
1421                         return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1422
1423                 case TIOCSSOFTCAR:
1424                         if(get_user(arg, (unsigned long __user *) argp))
1425                                 return -EFAULT;
1426                         tty->termios->c_cflag =
1427                                 ((tty->termios->c_cflag & ~CLOCAL) |
1428                                 (arg ? CLOCAL : 0));
1429                         return 0;
1430
1431                 case TIOCGSERIAL:
1432                         return isicom_get_serial_info(port, argp);
1433
1434                 case TIOCSSERIAL:
1435                         return isicom_set_serial_info(port, argp);
1436
1437                 default:
1438                         return -ENOIOCTLCMD;
1439         }
1440         return 0;
1441 }
1442
1443 /* set_termios et all */
1444 static void isicom_set_termios(struct tty_struct * tty, struct termios * old_termios)
1445 {
1446         struct isi_port * port = (struct isi_port *) tty->driver_data;
1447         unsigned long flags;
1448
1449         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1450                 return;
1451
1452         if (tty->termios->c_cflag == old_termios->c_cflag &&
1453             tty->termios->c_iflag == old_termios->c_iflag)
1454                 return;
1455
1456         save_flags(flags); cli();
1457         isicom_config_port(port);
1458         restore_flags(flags);
1459
1460         if ((old_termios->c_cflag & CRTSCTS) &&
1461             !(tty->termios->c_cflag & CRTSCTS)) {
1462                 tty->hw_stopped = 0;
1463                 isicom_start(tty);
1464         }
1465 }
1466
1467 /* throttle et all */
1468 static void isicom_throttle(struct tty_struct * tty)
1469 {
1470         struct isi_port * port = (struct isi_port *) tty->driver_data;
1471         struct isi_board * card = port->card;
1472         unsigned long flags;
1473
1474         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1475                 return;
1476
1477         /* tell the card that this port cannot handle any more data for now */
1478         save_flags(flags); cli();
1479         card->port_status &= ~(1 << port->channel);
1480         outw(card->port_status, card->base + 0x02);
1481         restore_flags(flags);
1482 }
1483
1484 /* unthrottle et all */
1485 static void isicom_unthrottle(struct tty_struct * tty)
1486 {
1487         struct isi_port * port = (struct isi_port *) tty->driver_data;
1488         struct isi_board * card = port->card;
1489         unsigned long flags;
1490
1491         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1492                 return;
1493
1494         /* tell the card that this port is ready to accept more data */
1495         save_flags(flags); cli();
1496         card->port_status |= (1 << port->channel);
1497         outw(card->port_status, card->base + 0x02);
1498         restore_flags(flags);
1499 }
1500
1501 /* stop et all */
1502 static void isicom_stop(struct tty_struct * tty)
1503 {
1504         struct isi_port * port = (struct isi_port *) tty->driver_data;
1505
1506         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1507                 return;
1508
1509         /* this tells the transmitter not to consider this port for
1510            data output to the card. */
1511         port->status &= ~ISI_TXOK;
1512 }
1513
1514 /* start et all */
1515 static void isicom_start(struct tty_struct * tty)
1516 {
1517         struct isi_port * port = (struct isi_port *) tty->driver_data;
1518
1519         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1520                 return;
1521
1522         /* this tells the transmitter to consider this port for
1523            data output to the card. */
1524         port->status |= ISI_TXOK;
1525 }
1526
1527 /* hangup et all */
1528 static void do_isicom_hangup(void * data)
1529 {
1530         struct isi_port * port = (struct isi_port *) data;
1531         struct tty_struct * tty;
1532
1533         tty = port->tty;
1534         if (tty)
1535                 tty_hangup(tty);        /* FIXME: module removal race here - AKPM */
1536 }
1537
1538 static void isicom_hangup(struct tty_struct * tty)
1539 {
1540         struct isi_port * port = (struct isi_port *) tty->driver_data;
1541
1542         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1543                 return;
1544
1545         isicom_shutdown_port(port);
1546         port->count = 0;
1547         port->flags &= ~ASYNC_NORMAL_ACTIVE;
1548         port->tty = NULL;
1549         wake_up_interruptible(&port->open_wait);
1550 }
1551
1552 /* flush_buffer et all */
1553 static void isicom_flush_buffer(struct tty_struct * tty)
1554 {
1555         struct isi_port * port = (struct isi_port *) tty->driver_data;
1556         unsigned long flags;
1557
1558         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1559                 return;
1560
1561         save_flags(flags); cli();
1562         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1563         restore_flags(flags);
1564
1565         wake_up_interruptible(&tty->write_wait);
1566         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
1567             tty->ldisc.write_wakeup)
1568                 (tty->ldisc.write_wakeup)(tty);
1569 }
1570
1571
1572 static int register_ioregion(void)
1573 {
1574         int count, done=0;
1575         for (count=0; count < BOARD_COUNT; count++ ) {
1576                 if (isi_card[count].base)
1577                         if (!request_region(isi_card[count].base,16,ISICOM_NAME)) {
1578                                 printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x is busy. Card%d will be disabled.\n",
1579                                         isi_card[count].base,isi_card[count].base+15,count+1);
1580                                 isi_card[count].base=0;
1581                                 done++;
1582                         }
1583         }
1584         return done;
1585 }
1586
1587 static void unregister_ioregion(void)
1588 {
1589         int count;
1590         for (count=0; count < BOARD_COUNT; count++ )
1591                 if (isi_card[count].base) {
1592                         release_region(isi_card[count].base,16);
1593 #ifdef ISICOM_DEBUG
1594                         printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x released for Card%d.\n",isi_card[count].base,isi_card[count].base+15,count+1);
1595 #endif
1596                 }
1597 }
1598
1599 static struct tty_operations isicom_ops = {
1600         .open   = isicom_open,
1601         .close  = isicom_close,
1602         .write  = isicom_write,
1603         .put_char       = isicom_put_char,
1604         .flush_chars    = isicom_flush_chars,
1605         .write_room     = isicom_write_room,
1606         .chars_in_buffer        = isicom_chars_in_buffer,
1607         .ioctl  = isicom_ioctl,
1608         .set_termios    = isicom_set_termios,
1609         .throttle       = isicom_throttle,
1610         .unthrottle     = isicom_unthrottle,
1611         .stop   = isicom_stop,
1612         .start  = isicom_start,
1613         .hangup = isicom_hangup,
1614         .flush_buffer   = isicom_flush_buffer,
1615         .tiocmget       = isicom_tiocmget,
1616         .tiocmset       = isicom_tiocmset,
1617 };
1618
1619 static int register_drivers(void)
1620 {
1621         int error;
1622
1623         /* tty driver structure initialization */
1624         isicom_normal = alloc_tty_driver(PORT_COUNT);
1625         if (!isicom_normal)
1626                 return -ENOMEM;
1627
1628         isicom_normal->owner    = THIS_MODULE;
1629         isicom_normal->name     = "ttyM";
1630         isicom_normal->devfs_name = "isicom/";
1631         isicom_normal->major    = ISICOM_NMAJOR;
1632         isicom_normal->minor_start      = 0;
1633         isicom_normal->type     = TTY_DRIVER_TYPE_SERIAL;
1634         isicom_normal->subtype  = SERIAL_TYPE_NORMAL;
1635         isicom_normal->init_termios     = tty_std_termios;
1636         isicom_normal->init_termios.c_cflag     =
1637                                 B9600 | CS8 | CREAD | HUPCL |CLOCAL;
1638         isicom_normal->flags    = TTY_DRIVER_REAL_RAW;
1639         tty_set_operations(isicom_normal, &isicom_ops);
1640
1641         if ((error=tty_register_driver(isicom_normal))!=0) {
1642                 printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n",
1643                         error);
1644                 put_tty_driver(isicom_normal);
1645                 return error;
1646         }
1647         return 0;
1648 }
1649
1650 static void unregister_drivers(void)
1651 {
1652         int error = tty_unregister_driver(isicom_normal);
1653         if (error)
1654                 printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error);
1655         put_tty_driver(isicom_normal);
1656 }
1657
1658 static int register_isr(void)
1659 {
1660         int count, done=0, card;
1661         int flag;
1662         unsigned char request;
1663         for (count=0; count < BOARD_COUNT; count++ ) {
1664                 if (isi_card[count].base) {
1665                 /*
1666                  * verify if the required irq has already been requested for
1667                  * another ISI Card, if so we already have it, else request it
1668                  */
1669                         request = YES;
1670                         for(card = 0; card < count; card++)
1671                         if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
1672                                 request = NO;
1673                                 if ((isi_card[count].isa == NO) && (isi_card[card].isa == NO))
1674                                         break;
1675                                 /*
1676                                  * ISA cards cannot share interrupts with other
1677                                  * PCI or ISA devices hence disable this card.
1678                                  */
1679                                 release_region(isi_card[count].base,16);
1680                                 isi_card[count].base = 0;
1681                                 break;
1682                         }
1683                         flag=0;
1684                         if(isi_card[count].isa == NO)
1685                                 flag |= SA_SHIRQ;
1686
1687                         if (request == YES) {
1688                                 if (request_irq(isi_card[count].irq, isicom_interrupt, SA_INTERRUPT|flag, ISICOM_NAME, NULL)) {
1689                                         printk(KERN_WARNING "ISICOM: Could not install handler at Irq %d. Card%d will be disabled.\n",
1690                                                 isi_card[count].irq, count+1);
1691                                         release_region(isi_card[count].base,16);
1692                                         isi_card[count].base=0;
1693                                 }
1694                                 else {
1695                                         printk(KERN_INFO "ISICOM: Card%d at 0x%x using irq %d.\n",
1696                                         count+1, isi_card[count].base, isi_card[count].irq);
1697
1698                                         irq_to_board[isi_card[count].irq]=&isi_card[count];
1699                                         done++;
1700                                 }
1701                         }
1702                 }
1703         }
1704         return done;
1705 }
1706
1707 static void unregister_isr(void)
1708 {
1709         int count, card;
1710         unsigned char freeirq;
1711         for (count=0; count < BOARD_COUNT; count++ ) {
1712                 if (isi_card[count].base) {
1713                         freeirq = YES;
1714                         for(card = 0; card < count; card++)
1715                                 if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
1716                                         freeirq = NO;
1717                                         break;
1718                                 }
1719                         if (freeirq == YES) {
1720                                 free_irq(isi_card[count].irq, NULL);
1721 #ifdef ISICOM_DEBUG
1722                                 printk(KERN_DEBUG "ISICOM: Irq %d released for Card%d.\n",isi_card[count].irq, count+1);
1723 #endif
1724                         }
1725                 }
1726         }
1727 }
1728
1729 static int isicom_init(void)
1730 {
1731         int card, channel, base;
1732         struct isi_port * port;
1733         unsigned long page;
1734
1735         if (!tmp_buf) {
1736                 page = get_zeroed_page(GFP_KERNEL);
1737                 if (!page) {
1738 #ifdef ISICOM_DEBUG
1739                         printk(KERN_DEBUG "ISICOM: Couldn't allocate page for tmp_buf.\n");
1740 #else
1741                         printk(KERN_ERR "ISICOM: Not enough memory...\n");
1742 #endif
1743                         return 0;
1744                 }
1745                 tmp_buf = (unsigned char *) page;
1746         }
1747
1748         if (!register_ioregion())
1749         {
1750                 printk(KERN_ERR "ISICOM: All required I/O space found busy.\n");
1751                 free_page((unsigned long)tmp_buf);
1752                 return 0;
1753         }
1754         if (register_drivers())
1755         {
1756                 unregister_ioregion();
1757                 free_page((unsigned long)tmp_buf);
1758                 return 0;
1759         }
1760         if (!register_isr())
1761         {
1762                 unregister_drivers();
1763                 /*  ioports already uregistered in register_isr */
1764                 free_page((unsigned long)tmp_buf);
1765                 return 0;
1766         }
1767
1768         memset(isi_ports, 0, sizeof(isi_ports));
1769         for (card = 0; card < BOARD_COUNT; card++) {
1770                 port = &isi_ports[card * 16];
1771                 isi_card[card].ports = port;
1772                 base = isi_card[card].base;
1773                 for (channel = 0; channel < 16; channel++, port++) {
1774                         port->magic = ISICOM_MAGIC;
1775                         port->card = &isi_card[card];
1776                         port->channel = channel;
1777                         port->close_delay = 50 * HZ/100;
1778                         port->closing_wait = 3000 * HZ/100;
1779                         INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
1780                         INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
1781                         port->status = 0;
1782                         init_waitqueue_head(&port->open_wait);
1783                         init_waitqueue_head(&port->close_wait);
1784                         /*  . . .  */
1785                 }
1786         }
1787
1788         return 1;
1789 }
1790
1791 /*
1792  *      Insmod can set static symbols so keep these static
1793  */
1794
1795 static int io[4];
1796 static int irq[4];
1797
1798 MODULE_AUTHOR("MultiTech");
1799 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1800 MODULE_LICENSE("GPL");
1801 MODULE_PARM(io, "1-4i");
1802 MODULE_PARM_DESC(io, "I/O ports for the cards");
1803 MODULE_PARM(irq, "1-4i");
1804 MODULE_PARM_DESC(irq, "Interrupts for the cards");
1805
1806 int init_module(void)
1807 {
1808         struct pci_dev *dev = NULL;
1809         int retval, card, idx, count;
1810         unsigned char pciirq;
1811         unsigned int ioaddr;
1812
1813         card = 0;
1814         for(idx=0; idx < BOARD_COUNT; idx++) {
1815                 if (io[idx]) {
1816                         isi_card[idx].base=io[idx];
1817                         isi_card[idx].irq=irq[idx];
1818                         isi_card[idx].isa=YES;
1819                         card++;
1820                 }
1821                 else {
1822                         isi_card[idx].base = 0;
1823                         isi_card[idx].irq = 0;
1824                 }
1825         }
1826
1827         for (idx=0 ;idx < card; idx++) {
1828                 if (!((isi_card[idx].irq==2)||(isi_card[idx].irq==3)||
1829                     (isi_card[idx].irq==4)||(isi_card[idx].irq==5)||
1830                     (isi_card[idx].irq==7)||(isi_card[idx].irq==10)||
1831                     (isi_card[idx].irq==11)||(isi_card[idx].irq==12)||
1832                     (isi_card[idx].irq==15))) {
1833
1834                         if (isi_card[idx].base) {
1835                                 printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n",
1836                                         isi_card[idx].irq, idx+1);
1837                                 isi_card[idx].base=0;
1838                                 card--;
1839                         }
1840                 }
1841         }
1842
1843         if (card < BOARD_COUNT) {
1844                 for (idx=0; idx < DEVID_COUNT; idx++) {
1845                         dev = NULL;
1846                         for (;;){
1847                                 if (!(dev = pci_find_device(VENDOR_ID, isicom_pci_tbl[idx].device, dev)))
1848                                         break;
1849                                 if (card >= BOARD_COUNT)
1850                                         break;
1851
1852                                 if (pci_enable_device(dev))
1853                                         break;
1854
1855                                 /* found a PCI ISI card! */
1856                                 ioaddr = pci_resource_start (dev, 3); /* i.e at offset 0x1c in the
1857                                                                        * PCI configuration register
1858                                                                        * space.
1859                                                                        */
1860                                 pciirq = dev->irq;
1861                                 printk(KERN_INFO "ISI PCI Card(Device ID 0x%x)\n", isicom_pci_tbl[idx].device);
1862                                 /*
1863                                  * allot the first empty slot in the array
1864                                  */
1865                                 for (count=0; count < BOARD_COUNT; count++) {
1866                                         if (isi_card[count].base == 0) {
1867                                                 isi_card[count].base = ioaddr;
1868                                                 isi_card[count].irq = pciirq;
1869                                                 isi_card[count].isa = NO;
1870                                                 card++;
1871                                                 break;
1872                                         }
1873                                 }
1874                         }
1875                         if (card >= BOARD_COUNT) break;
1876                 }
1877         }
1878
1879         if (!(isi_card[0].base || isi_card[1].base || isi_card[2].base || isi_card[3].base)) {
1880                 printk(KERN_ERR "ISICOM: No valid card configuration. Driver cannot be initialized...\n");
1881                 return -EIO;
1882         }
1883
1884         retval = misc_register(&isiloader_device);
1885         if (retval < 0) {
1886                 printk(KERN_ERR "ISICOM: Unable to register firmware loader driver.\n");
1887                 return retval;
1888         }
1889
1890         if (!isicom_init()) {
1891                 if (misc_deregister(&isiloader_device))
1892                         printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
1893                 return -EIO;
1894         }
1895
1896         init_timer(&tx);
1897         tx.expires = jiffies + 1;
1898         tx.data = 0;
1899         tx.function = isicom_tx;
1900         re_schedule = 1;
1901         add_timer(&tx);
1902
1903         return 0;
1904 }
1905
1906 void cleanup_module(void)
1907 {
1908         re_schedule = 0;
1909         set_current_state(TASK_INTERRUPTIBLE);
1910         schedule_timeout(HZ);
1911
1912 #ifdef ISICOM_DEBUG
1913         printk("ISICOM: isicom_tx tx_count = %ld.\n", tx_count);
1914 #endif
1915
1916 #ifdef ISICOM_DEBUG
1917         printk("ISICOM: uregistering isr ...\n");
1918 #endif
1919         unregister_isr();
1920
1921 #ifdef ISICOM_DEBUG
1922         printk("ISICOM: unregistering drivers ...\n");
1923 #endif
1924         unregister_drivers();
1925
1926 #ifdef ISICOM_DEBUG
1927         printk("ISICOM: unregistering ioregion ...\n");
1928 #endif
1929         unregister_ioregion();
1930
1931 #ifdef ISICOM_DEBUG
1932         printk("ISICOM: freeing tmp_buf ...\n");
1933 #endif
1934         free_page((unsigned long)tmp_buf);
1935
1936 #ifdef ISICOM_DEBUG
1937         printk("ISICOM: unregistering firmware loader ...\n");
1938 #endif
1939         if (misc_deregister(&isiloader_device))
1940                 printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
1941 }