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@lxorguk.ukuu.org.uk
  11  *                                      Merge to 2.0.x kernel tree
  12  *                                      Obtain and use official major/minors
  13  *                                      Loader switched to a misc device
  14  *                                      (fixed range check bug as a side effect)
  15  *                                      Printk clean up
  16  *      9/12/98 alan@lxorguk.ukuu.org.uk
  17  *                                      Rough port to 2.1.x
  18  *
  19  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  20  *                                      a new unified driver.
  21  *
  22  *      3/9/99  sameer                  Added support for ISI4616 cards.
  23  *
  24  *      16/9/99 sameer                  We do not force RTS low anymore.
  25  *                                      This is to prevent the firmware
  26  *                                      from getting confused.
  27  *
  28  *      26/10/99 sameer                 Cosmetic changes:The driver now
  29  *                                      dumps the Port Count information
  30  *                                      along with I/O address and IRQ.
  31  *
  32  *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
  33  *
  34  *      10/5/00  sameer                 Fixed isicom_shutdown_board()
  35  *                                      to not lower DTR on all the ports
  36  *                                      when the last port on the card is
  37  *                                      closed.
  38  *
  39  *      10/5/00  sameer                 Signal mask setup command added
  40  *                                      to  isicom_setup_port and
  41  *                                      isicom_shutdown_port.
  42  *
  43  *      24/5/00  sameer                 The driver is now SMP aware.
  44  *
  45  *
  46  *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
  47  *
  48  *
  49  *      03/01/01  anil .s               Added support for resetting the
  50  *                                      internal modems on ISI cards.
  51  *
  52  *      08/02/01  anil .s               Upgraded the driver for kernel
  53  *                                      2.4.x
  54  *
  55  *      11/04/01  Kevin                 Fixed firmware load problem with
  56  *                                      ISIHP-4X card
  57  *
  58  *      30/04/01  anil .s               Fixed the remote login through
  59  *                                      ISI port problem. Now the link
  60  *                                      does not go down before password
  61  *                                      prompt.
  62  *
  63  *      03/05/01  anil .s               Fixed the problem with IRQ sharing
  64  *                                      among ISI-PCI cards.
  65  *
  66  *      03/05/01  anil .s               Added support to display the version
  67  *                                      info during insmod as well as module
  68  *                                      listing by lsmod.
  69  *
  70  *      10/05/01  anil .s               Done the modifications to the source
  71  *                                      file and Install script so that the
  72  *                                      same installation can be used for
  73  *                                      2.2.x and 2.4.x kernel.
  74  *
  75  *      06/06/01  anil .s               Now we drop both dtr and rts during
  76  *                                      shutdown_port as well as raise them
  77  *                                      during isicom_config_port.
  78  *
  79  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  80  *                                      restore_flags on failure in
  81  *                                      isicom_send_break, verify put_user
  82  *                                      result
  83  *
  84  *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
  85  *                                      Baud index extended to 21
  86  *
  87  *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
  88  *                                      Taken care of license warning.
  89  *
  90  *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
  91  *                                      Red Hat Distribution
  92  *
  93  *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
  94  *                                      into a single 2.6 driver
  95  *
  96  *      ***********************************************************
  97  *
  98  *      To use this driver you also need the support package. You
  99  *      can find this in RPM format on
 100  *              ftp://ftp.linux.org.uk/pub/linux/alan
 101  *
 102  *      You can find the original tools for this direct from Multitech
 103  *              ftp://ftp.multitech.com/ISI-Cards/
 104  *
 105  *      Having installed the cards the module options (/etc/modprobe.conf)
 106  *
 107  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
 108  *
 109  *      Omit those entries for boards you don't have installed.
 110  *
 111  *      TODO
 112  *              Merge testing
 113  *              64-bit verification
 114  */
 115
 116 #include <linux/module.h>
 117 #include <linux/firmware.h>
 118 #include <linux/kernel.h>
 119 #include <linux/tty.h>
 120 #include <linux/tty_flip.h>
 121 #include <linux/termios.h>
 122 #include <linux/fs.h>
 123 #include <linux/sched.h>
 124 #include <linux/serial.h>
 125 #include <linux/smp_lock.h>
 126 #include <linux/mm.h>
 127 #include <linux/interrupt.h>
 128 #include <linux/timer.h>
 129 #include <linux/delay.h>
 130 #include <linux/ioport.h>
 131
 132 #include <linux/uaccess.h>
 133 #include <linux/io.h>
 134 #include <asm/system.h>
 135
 136 #include <linux/pci.h>
 137
 138 #include <linux/isicom.h>
 139
 140 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 141 #define ClearInterrupt(base) inw((base) + 0x0a)
 142
 143 #define pr_dbg(str...) pr_debug("ISICOM: " str)
 144 #ifdef DEBUG
 145 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 146 #else
 147 #define isicom_paranoia_check(a, b, c) 0
 148 #endif
 149
 150 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 151 static void __devexit isicom_remove(struct pci_dev *);
 152
 153 static struct pci_device_id isicom_pci_tbl[] = {
 154         { PCI_DEVICE(VENDOR_ID, 0x2028) },
 155         { PCI_DEVICE(VENDOR_ID, 0x2051) },
 156         { PCI_DEVICE(VENDOR_ID, 0x2052) },
 157         { PCI_DEVICE(VENDOR_ID, 0x2053) },
 158         { PCI_DEVICE(VENDOR_ID, 0x2054) },
 159         { PCI_DEVICE(VENDOR_ID, 0x2055) },
 160         { PCI_DEVICE(VENDOR_ID, 0x2056) },
 161         { PCI_DEVICE(VENDOR_ID, 0x2057) },
 162         { PCI_DEVICE(VENDOR_ID, 0x2058) },
 163         { 0 }
 164 };
 165 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 166
 167 static struct pci_driver isicom_driver = {
 168         .name           = "isicom",
 169         .id_table       = isicom_pci_tbl,
 170         .probe          = isicom_probe,
 171         .remove         = __devexit_p(isicom_remove)
 172 };
 173
 174 static int prev_card = 3;       /*      start servicing isi_card[0]     */
 175 static struct tty_driver *isicom_normal;
 176
 177 static void isicom_tx(unsigned long _data);
 178 static void isicom_start(struct tty_struct *tty);
 179
 180 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
 181
 182 /*   baud index mappings from linux defns to isi */
 183
 184 static signed char linuxb_to_isib[] = {
 185         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 186 };
 187
 188 struct  isi_board {
 189         unsigned long           base;
 190         int                     irq;
 191         unsigned char           port_count;
 192         unsigned short          status;
 193         unsigned short          port_status; /* each bit for each port */
 194         unsigned short          shift_count;
 195         struct isi_port         *ports;
 196         signed char             count;
 197         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 198         unsigned long           flags;
 199         unsigned int            index;
 200 };
 201
 202 struct  isi_port {
 203         unsigned short          magic;
 204         struct tty_port         port;
 205         u16                     channel;
 206         u16                     status;
 207         struct isi_board        *card;
 208         unsigned char           *xmit_buf;
 209         int                     xmit_head;
 210         int                     xmit_tail;
 211         int                     xmit_cnt;
 212 };
 213
 214 static struct isi_board isi_card[BOARD_COUNT];
 215 static struct isi_port  isi_ports[PORT_COUNT];
 216
 217 /*
 218  *      Locking functions for card level locking. We need to own both
 219  *      the kernel lock for the card and have the card in a position that
 220  *      it wants to talk.
 221  */
 222
 223 static inline int WaitTillCardIsFree(unsigned long base)
 224 {
 225         unsigned int count = 0;
 226         unsigned int a = in_atomic(); /* do we run under spinlock? */
 227
 228         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 229                 if (a)
 230                         mdelay(1);
 231                 else
 232                         msleep(1);
 233
 234         return !(inw(base + 0xe) & 0x1);
 235 }
 236
 237 static int lock_card(struct isi_board *card)
 238 {
 239         unsigned long base = card->base;
 240         unsigned int retries, a;
 241
 242         for (retries = 0; retries < 10; retries++) {
 243                 spin_lock_irqsave(&card->card_lock, card->flags);
 244                 for (a = 0; a < 10; a++) {
 245                         if (inw(base + 0xe) & 0x1)
 246                                 return 1;
 247                         udelay(10);
 248                 }
 249                 spin_unlock_irqrestore(&card->card_lock, card->flags);
 250                 msleep(10);
 251         }
 252         printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
 253                 card->base);
 254
 255         return 0;       /* Failed to acquire the card! */
 256 }
 257
 258 static void unlock_card(struct isi_board *card)
 259 {
 260         spin_unlock_irqrestore(&card->card_lock, card->flags);
 261 }
 262
 263 /*
 264  *  ISI Card specific ops ...
 265  */
 266
 267 /* card->lock HAS to be held */
 268 static void raise_dtr(struct isi_port *port)
 269 {
 270         struct isi_board *card = port->card;
 271         unsigned long base = card->base;
 272         u16 channel = port->channel;
 273
 274         if (WaitTillCardIsFree(base))
 275                 return;
 276
 277         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 278         outw(0x0504, base);
 279         InterruptTheCard(base);
 280         port->status |= ISI_DTR;
 281 }
 282
 283 /* card->lock HAS to be held */
 284 static inline void drop_dtr(struct isi_port *port)
 285 {
 286         struct isi_board *card = port->card;
 287         unsigned long base = card->base;
 288         u16 channel = port->channel;
 289
 290         if (WaitTillCardIsFree(base))
 291                 return;
 292
 293         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 294         outw(0x0404, base);
 295         InterruptTheCard(base);
 296         port->status &= ~ISI_DTR;
 297 }
 298
 299 /* card->lock HAS to be held */
 300 static inline void raise_rts(struct isi_port *port)
 301 {
 302         struct isi_board *card = port->card;
 303         unsigned long base = card->base;
 304         u16 channel = port->channel;
 305
 306         if (WaitTillCardIsFree(base))
 307                 return;
 308
 309         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 310         outw(0x0a04, base);
 311         InterruptTheCard(base);
 312         port->status |= ISI_RTS;
 313 }
 314
 315 /* card->lock HAS to be held */
 316 static inline void drop_rts(struct isi_port *port)
 317 {
 318         struct isi_board *card = port->card;
 319         unsigned long base = card->base;
 320         u16 channel = port->channel;
 321
 322         if (WaitTillCardIsFree(base))
 323                 return;
 324
 325         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 326         outw(0x0804, base);
 327         InterruptTheCard(base);
 328         port->status &= ~ISI_RTS;
 329 }
 330
 331 /* card->lock MUST NOT be held */
 332
 333 static void isicom_dtr_rts(struct tty_port *port, int on)
 334 {
 335         struct isi_port *ip = container_of(port, struct isi_port, port);
 336         struct isi_board *card = ip->card;
 337         unsigned long base = card->base;
 338         u16 channel = ip->channel;
 339
 340         if (!lock_card(card))
 341                 return;
 342
 343         if (on) {
 344                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 345                 outw(0x0f04, base);
 346                 InterruptTheCard(base);
 347                 ip->status |= (ISI_DTR | ISI_RTS);
 348         } else {
 349                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 350                 outw(0x0C04, base);
 351                 InterruptTheCard(base);
 352                 ip->status &= ~(ISI_DTR | ISI_RTS);
 353         }
 354         unlock_card(card);
 355 }
 356
 357 /* card->lock HAS to be held */
 358 static void drop_dtr_rts(struct isi_port *port)
 359 {
 360         struct isi_board *card = port->card;
 361         unsigned long base = card->base;
 362         u16 channel = port->channel;
 363
 364         if (WaitTillCardIsFree(base))
 365                 return;
 366
 367         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 368         outw(0x0c04, base);
 369         InterruptTheCard(base);
 370         port->status &= ~(ISI_RTS | ISI_DTR);
 371 }
 372
 373 /*
 374  *      ISICOM Driver specific routines ...
 375  *
 376  */
 377
 378 static inline int __isicom_paranoia_check(struct isi_port const *port,
 379         char *name, const char *routine)
 380 {
 381         if (!port) {
 382                 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
 383                         "dev %s in %s.\n", name, routine);
 384                 return 1;
 385         }
 386         if (port->magic != ISICOM_MAGIC) {
 387                 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
 388                         "dev %s in %s.\n", name, routine);
 389                 return 1;
 390         }
 391
 392         return 0;
 393 }
 394
 395 /*
 396  *      Transmitter.
 397  *
 398  *      We shovel data into the card buffers on a regular basis. The card
 399  *      will do the rest of the work for us.
 400  */
 401
 402 static void isicom_tx(unsigned long _data)
 403 {
 404         unsigned long flags, base;
 405         unsigned int retries;
 406         short count = (BOARD_COUNT-1), card;
 407         short txcount, wrd, residue, word_count, cnt;
 408         struct isi_port *port;
 409         struct tty_struct *tty;
 410
 411         /*      find next active board  */
 412         card = (prev_card + 1) & 0x0003;
 413         while (count-- > 0) {
 414                 if (isi_card[card].status & BOARD_ACTIVE)
 415                         break;
 416                 card = (card + 1) & 0x0003;
 417         }
 418         if (!(isi_card[card].status & BOARD_ACTIVE))
 419                 goto sched_again;
 420
 421         prev_card = card;
 422
 423         count = isi_card[card].port_count;
 424         port = isi_card[card].ports;
 425         base = isi_card[card].base;
 426
 427         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 428         for (retries = 0; retries < 100; retries++) {
 429                 if (inw(base + 0xe) & 0x1)
 430                         break;
 431                 udelay(2);
 432         }
 433         if (retries >= 100)
 434                 goto unlock;
 435
 436         tty = tty_port_tty_get(&port->port);
 437         if (tty == NULL)
 438                 goto put_unlock;
 439
 440         for (; count > 0; count--, port++) {
 441                 /* port not active or tx disabled to force flow control */
 442                 if (!(port->port.flags & ASYNC_INITIALIZED) ||
 443                                 !(port->status & ISI_TXOK))
 444                         continue;
 445
 446                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 447                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 448                         continue;
 449
 450                 if (!(inw(base + 0x02) & (1 << port->channel)))
 451                         continue;
 452
 453                 pr_dbg("txing %d bytes, port%d.\n", txcount,
 454                         port->channel + 1);
 455                 outw((port->channel << isi_card[card].shift_count) | txcount,
 456                         base);
 457                 residue = NO;
 458                 wrd = 0;
 459                 while (1) {
 460                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 461                                         - port->xmit_tail));
 462                         if (residue == YES) {
 463                                 residue = NO;
 464                                 if (cnt > 0) {
 465                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 466                                                                         << 8);
 467                                         port->xmit_tail = (port->xmit_tail + 1)
 468                                                 & (SERIAL_XMIT_SIZE - 1);
 469                                         port->xmit_cnt--;
 470                                         txcount--;
 471                                         cnt--;
 472                                         outw(wrd, base);
 473                                 } else {
 474                                         outw(wrd, base);
 475                                         break;
 476                                 }
 477                         }
 478                         if (cnt <= 0)
 479                                 break;
 480                         word_count = cnt >> 1;
 481                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 482                         port->xmit_tail = (port->xmit_tail
 483                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 484                         txcount -= (word_count << 1);
 485                         port->xmit_cnt -= (word_count << 1);
 486                         if (cnt & 0x0001) {
 487                                 residue = YES;
 488                                 wrd = port->port.xmit_buf[port->xmit_tail];
 489                                 port->xmit_tail = (port->xmit_tail + 1)
 490                                         & (SERIAL_XMIT_SIZE - 1);
 491                                 port->xmit_cnt--;
 492                                 txcount--;
 493                         }
 494                 }
 495
 496                 InterruptTheCard(base);
 497                 if (port->xmit_cnt <= 0)
 498                         port->status &= ~ISI_TXOK;
 499                 if (port->xmit_cnt <= WAKEUP_CHARS)
 500                         tty_wakeup(tty);
 501         }
 502
 503 put_unlock:
 504         tty_kref_put(tty);
 505 unlock:
 506         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 507         /*      schedule another tx for hopefully in about 10ms */
 508 sched_again:
 509         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 510 }
 511
 512 /*
 513  *      Main interrupt handler routine
 514  */
 515
 516 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 517 {
 518         struct isi_board *card = dev_id;
 519         struct isi_port *port;
 520         struct tty_struct *tty;
 521         unsigned long base;
 522         u16 header, word_count, count, channel;
 523         short byte_count;
 524         unsigned char *rp;
 525
 526         if (!card || !(card->status & FIRMWARE_LOADED))
 527                 return IRQ_NONE;
 528
 529         base = card->base;
 530
 531         /* did the card interrupt us? */
 532         if (!(inw(base + 0x0e) & 0x02))
 533                 return IRQ_NONE;
 534
 535         spin_lock(&card->card_lock);
 536
 537         /*
 538          * disable any interrupts from the PCI card and lower the
 539          * interrupt line
 540          */
 541         outw(0x8000, base+0x04);
 542         ClearInterrupt(base);
 543
 544         inw(base);              /* get the dummy word out */
 545         header = inw(base);
 546         channel = (header & 0x7800) >> card->shift_count;
 547         byte_count = header & 0xff;
 548
 549         if (channel + 1 > card->port_count) {
 550                 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
 551                         "%d(channel) > port_count.\n", base, channel+1);
 552                 outw(0x0000, base+0x04); /* enable interrupts */
 553                 spin_unlock(&card->card_lock);
 554                 return IRQ_HANDLED;
 555         }
 556         port = card->ports + channel;
 557         if (!(port->port.flags & ASYNC_INITIALIZED)) {
 558                 outw(0x0000, base+0x04); /* enable interrupts */
 559                 spin_unlock(&card->card_lock);
 560                 return IRQ_HANDLED;
 561         }
 562
 563         tty = tty_port_tty_get(&port->port);
 564         if (tty == NULL) {
 565                 word_count = byte_count >> 1;
 566                 while (byte_count > 1) {
 567                         inw(base);
 568                         byte_count -= 2;
 569                 }
 570                 if (byte_count & 0x01)
 571                         inw(base);
 572                 outw(0x0000, base+0x04); /* enable interrupts */
 573                 spin_unlock(&card->card_lock);
 574                 return IRQ_HANDLED;
 575         }
 576
 577         if (header & 0x8000) {          /* Status Packet */
 578                 header = inw(base);
 579                 switch (header & 0xff) {
 580                 case 0: /* Change in EIA signals */
 581                         if (port->port.flags & ASYNC_CHECK_CD) {
 582                                 if (port->status & ISI_DCD) {
 583                                         if (!(header & ISI_DCD)) {
 584                                         /* Carrier has been lost  */
 585                                                 pr_dbg("interrupt: DCD->low.\n"
 586                                                         );
 587                                                 port->status &= ~ISI_DCD;
 588                                                 tty_hangup(tty);
 589                                         }
 590                                 } else if (header & ISI_DCD) {
 591                                 /* Carrier has been detected */
 592                                         pr_dbg("interrupt: DCD->high.\n");
 593                                         port->status |= ISI_DCD;
 594                                         wake_up_interruptible(&port->port.open_wait);
 595                                 }
 596                         } else {
 597                                 if (header & ISI_DCD)
 598                                         port->status |= ISI_DCD;
 599                                 else
 600                                         port->status &= ~ISI_DCD;
 601                         }
 602
 603                         if (port->port.flags & ASYNC_CTS_FLOW) {
 604                                 if (tty->hw_stopped) {
 605                                         if (header & ISI_CTS) {
 606                                                 port->port.tty->hw_stopped = 0;
 607                                                 /* start tx ing */
 608                                                 port->status |= (ISI_TXOK
 609                                                         | ISI_CTS);
 610                                                 tty_wakeup(tty);
 611                                         }
 612                                 } else if (!(header & ISI_CTS)) {
 613                                         tty->hw_stopped = 1;
 614                                         /* stop tx ing */
 615                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 616                                 }
 617                         } else {
 618                                 if (header & ISI_CTS)
 619                                         port->status |= ISI_CTS;
 620                                 else
 621                                         port->status &= ~ISI_CTS;
 622                         }
 623
 624                         if (header & ISI_DSR)
 625                                 port->status |= ISI_DSR;
 626                         else
 627                                 port->status &= ~ISI_DSR;
 628
 629                         if (header & ISI_RI)
 630                                 port->status |= ISI_RI;
 631                         else
 632                                 port->status &= ~ISI_RI;
 633
 634                         break;
 635
 636                 case 1: /* Received Break !!! */
 637                         tty_insert_flip_char(tty, 0, TTY_BREAK);
 638                         if (port->port.flags & ASYNC_SAK)
 639                                 do_SAK(tty);
 640                         tty_flip_buffer_push(tty);
 641                         break;
 642
 643                 case 2: /* Statistics            */
 644                         pr_dbg("isicom_interrupt: stats!!!.\n");
 645                         break;
 646
 647                 default:
 648                         pr_dbg("Intr: Unknown code in status packet.\n");
 649                         break;
 650                 }
 651         } else {                                /* Data   Packet */
 652
 653                 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
 654                 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
 655                 word_count = count >> 1;
 656                 insw(base, rp, word_count);
 657                 byte_count -= (word_count << 1);
 658                 if (count & 0x0001) {
 659                         tty_insert_flip_char(tty,  inw(base) & 0xff,
 660                                 TTY_NORMAL);
 661                         byte_count -= 2;
 662                 }
 663                 if (byte_count > 0) {
 664                         pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
 665                                 "bytes...\n", base, channel + 1);
 666                 /* drain out unread xtra data */
 667                 while (byte_count > 0) {
 668                                 inw(base);
 669                                 byte_count -= 2;
 670                         }
 671                 }
 672                 tty_flip_buffer_push(tty);
 673         }
 674         outw(0x0000, base+0x04); /* enable interrupts */
 675         spin_unlock(&card->card_lock);
 676         tty_kref_put(tty);
 677
 678         return IRQ_HANDLED;
 679 }
 680
 681 static void isicom_config_port(struct tty_struct *tty)
 682 {
 683         struct isi_port *port = tty->driver_data;
 684         struct isi_board *card = port->card;
 685         unsigned long baud;
 686         unsigned long base = card->base;
 687         u16 channel_setup, channel = port->channel,
 688                 shift_count = card->shift_count;
 689         unsigned char flow_ctrl;
 690
 691         /* FIXME: Switch to new tty baud API */
 692         baud = C_BAUD(tty);
 693         if (baud & CBAUDEX) {
 694                 baud &= ~CBAUDEX;
 695
 696                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 697                  *  then the card is programmed for 57.6Kbps or 115Kbps
 698                  *  respectively.
 699                  */
 700
 701                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 702                 if (baud < 1 || baud > 4)
 703                         tty->termios->c_cflag &= ~CBAUDEX;
 704                 else
 705                         baud += 15;
 706         }
 707         if (baud == 15) {
 708
 709                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 710                  *  by the set_serial_info ioctl ... this is done by
 711                  *  the 'setserial' utility.
 712                  */
 713
 714                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 715                         baud++; /*  57.6 Kbps */
 716                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 717                         baud += 2; /*  115  Kbps */
 718                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 719                         baud += 3; /* 230 kbps*/
 720                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 721                         baud += 4; /* 460 kbps*/
 722         }
 723         if (linuxb_to_isib[baud] == -1) {
 724                 /* hang up */
 725                 drop_dtr(port);
 726                 return;
 727         } else
 728                 raise_dtr(port);
 729
 730         if (WaitTillCardIsFree(base) == 0) {
 731                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 732                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 733                 channel_setup = 0;
 734                 switch (C_CSIZE(tty)) {
 735                 case CS5:
 736                         channel_setup |= ISICOM_CS5;
 737                         break;
 738                 case CS6:
 739                         channel_setup |= ISICOM_CS6;
 740                         break;
 741                 case CS7:
 742                         channel_setup |= ISICOM_CS7;
 743                         break;
 744                 case CS8:
 745                         channel_setup |= ISICOM_CS8;
 746                         break;
 747                 }
 748
 749                 if (C_CSTOPB(tty))
 750                         channel_setup |= ISICOM_2SB;
 751                 if (C_PARENB(tty)) {
 752                         channel_setup |= ISICOM_EVPAR;
 753                         if (C_PARODD(tty))
 754                                 channel_setup |= ISICOM_ODPAR;
 755                 }
 756                 outw(channel_setup, base);
 757                 InterruptTheCard(base);
 758         }
 759         if (C_CLOCAL(tty))
 760                 port->port.flags &= ~ASYNC_CHECK_CD;
 761         else
 762                 port->port.flags |= ASYNC_CHECK_CD;
 763
 764         /* flow control settings ...*/
 765         flow_ctrl = 0;
 766         port->port.flags &= ~ASYNC_CTS_FLOW;
 767         if (C_CRTSCTS(tty)) {
 768                 port->port.flags |= ASYNC_CTS_FLOW;
 769                 flow_ctrl |= ISICOM_CTSRTS;
 770         }
 771         if (I_IXON(tty))
 772                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 773         if (I_IXOFF(tty))
 774                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 775
 776         if (WaitTillCardIsFree(base) == 0) {
 777                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 778                 outw(flow_ctrl << 8 | 0x05, base);
 779                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 780                 InterruptTheCard(base);
 781         }
 782
 783         /*      rx enabled -> enable port for rx on the card    */
 784         if (C_CREAD(tty)) {
 785                 card->port_status |= (1 << channel);
 786                 outw(card->port_status, base + 0x02);
 787         }
 788 }
 789
 790 /* open et all */
 791
 792 static inline void isicom_setup_board(struct isi_board *bp)
 793 {
 794         int channel;
 795         struct isi_port *port;
 796
 797         bp->count++;
 798         if (!(bp->status & BOARD_INIT)) {
 799                 port = bp->ports;
 800                 for (channel = 0; channel < bp->port_count; channel++, port++)
 801                         drop_dtr_rts(port);
 802         }
 803         bp->status |= BOARD_ACTIVE | BOARD_INIT;
 804 }
 805
 806 /* Activate and thus setup board are protected from races against shutdown
 807    by the tty_port mutex */
 808
 809 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 810 {
 811         struct isi_port *port = container_of(tport, struct isi_port, port);
 812         struct isi_board *card = port->card;
 813         unsigned long flags;
 814
 815         if (tty_port_alloc_xmit_buf(tport) < 0)
 816                 return -ENOMEM;
 817
 818         spin_lock_irqsave(&card->card_lock, flags);
 819         isicom_setup_board(card);
 820
 821         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 822
 823         /*      discard any residual data       */
 824         if (WaitTillCardIsFree(card->base) == 0) {
 825                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 826                                 card->base);
 827                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 828                 InterruptTheCard(card->base);
 829         }
 830         isicom_config_port(tty);
 831         spin_unlock_irqrestore(&card->card_lock, flags);
 832
 833         return 0;
 834 }
 835
 836 static int isicom_carrier_raised(struct tty_port *port)
 837 {
 838         struct isi_port *ip = container_of(port, struct isi_port, port);
 839         return (ip->status & ISI_DCD)?1 : 0;
 840 }
 841
 842 static struct tty_port *isicom_find_port(struct tty_struct *tty)
 843 {
 844         struct isi_port *port;
 845         struct isi_board *card;
 846         unsigned int board;
 847         int line = tty->index;
 848
 849         if (line < 0 || line > PORT_COUNT-1)
 850                 return NULL;
 851         board = BOARD(line);
 852         card = &isi_card[board];
 853
 854         if (!(card->status & FIRMWARE_LOADED))
 855                 return NULL;
 856
 857         /*  open on a port greater than the port count for the card !!! */
 858         if (line > ((board * 16) + card->port_count - 1))
 859                 return NULL;
 860
 861         port = &isi_ports[line];
 862         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 863                 return NULL;
 864
 865         return &port->port;
 866 }
 867
 868 static int isicom_open(struct tty_struct *tty, struct file *filp)
 869 {
 870         struct isi_port *port;
 871         struct isi_board *card;
 872         struct tty_port *tport;
 873
 874         tport = isicom_find_port(tty);
 875         if (tport == NULL)
 876                 return -ENODEV;
 877         port = container_of(tport, struct isi_port, port);
 878         card = &isi_card[BOARD(tty->index)];
 879
 880         return tty_port_open(tport, tty, filp);
 881 }
 882
 883 /* close et all */
 884
 885 /* card->lock HAS to be held */
 886 static void isicom_shutdown_port(struct isi_port *port)
 887 {
 888         struct isi_board *card = port->card;
 889
 890         if (--card->count < 0) {
 891                 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
 892                         card->base, card->count);
 893                 card->count = 0;
 894         }
 895         /* last port was closed, shutdown that board too */
 896         if (!card->count)
 897                 card->status &= BOARD_ACTIVE;
 898 }
 899
 900 static void isicom_flush_buffer(struct tty_struct *tty)
 901 {
 902         struct isi_port *port = tty->driver_data;
 903         struct isi_board *card = port->card;
 904         unsigned long flags;
 905
 906         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 907                 return;
 908
 909         spin_lock_irqsave(&card->card_lock, flags);
 910         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 911         spin_unlock_irqrestore(&card->card_lock, flags);
 912
 913         tty_wakeup(tty);
 914 }
 915
 916 static void isicom_shutdown(struct tty_port *port)
 917 {
 918         struct isi_port *ip = container_of(port, struct isi_port, port);
 919         struct isi_board *card = ip->card;
 920         unsigned long flags;
 921
 922         /* indicate to the card that no more data can be received
 923            on this port */
 924         spin_lock_irqsave(&card->card_lock, flags);
 925         card->port_status &= ~(1 << ip->channel);
 926         outw(card->port_status, card->base + 0x02);
 927         isicom_shutdown_port(ip);
 928         spin_unlock_irqrestore(&card->card_lock, flags);
 929         tty_port_free_xmit_buf(port);
 930 }
 931
 932 static void isicom_close(struct tty_struct *tty, struct file *filp)
 933 {
 934         struct isi_port *ip = tty->driver_data;
 935         struct tty_port *port = &ip->port;
 936         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 937                 return;
 938         tty_port_close(port, tty, filp);
 939 }
 940
 941 /* write et all */
 942 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 943         int count)
 944 {
 945         struct isi_port *port = tty->driver_data;
 946         struct isi_board *card = port->card;
 947         unsigned long flags;
 948         int cnt, total = 0;
 949
 950         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 951                 return 0;
 952
 953         spin_lock_irqsave(&card->card_lock, flags);
 954
 955         while (1) {
 956                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 957                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 958                 if (cnt <= 0)
 959                         break;
 960
 961                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 962                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 963                         - 1);
 964                 port->xmit_cnt += cnt;
 965                 buf += cnt;
 966                 count -= cnt;
 967                 total += cnt;
 968         }
 969         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 970                 port->status |= ISI_TXOK;
 971         spin_unlock_irqrestore(&card->card_lock, flags);
 972         return total;
 973 }
 974
 975 /* put_char et all */
 976 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 977 {
 978         struct isi_port *port = tty->driver_data;
 979         struct isi_board *card = port->card;
 980         unsigned long flags;
 981
 982         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 983                 return 0;
 984
 985         spin_lock_irqsave(&card->card_lock, flags);
 986         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 987                 spin_unlock_irqrestore(&card->card_lock, flags);
 988                 return 0;
 989         }
 990
 991         port->port.xmit_buf[port->xmit_head++] = ch;
 992         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 993         port->xmit_cnt++;
 994         spin_unlock_irqrestore(&card->card_lock, flags);
 995         return 1;
 996 }
 997
 998 /* flush_chars et all */
 999 static void isicom_flush_chars(struct tty_struct *tty)
1000 {
1001         struct isi_port *port = tty->driver_data;
1002
1003         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1004                 return;
1005
1006         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1007                         !port->port.xmit_buf)
1008                 return;
1009
1010         /* this tells the transmitter to consider this port for
1011            data output to the card ... that's the best we can do. */
1012         port->status |= ISI_TXOK;
1013 }
1014
1015 /* write_room et all */
1016 static int isicom_write_room(struct tty_struct *tty)
1017 {
1018         struct isi_port *port = tty->driver_data;
1019         int free;
1020
1021         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1022                 return 0;
1023
1024         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1025         if (free < 0)
1026                 free = 0;
1027         return free;
1028 }
1029
1030 /* chars_in_buffer et all */
1031 static int isicom_chars_in_buffer(struct tty_struct *tty)
1032 {
1033         struct isi_port *port = tty->driver_data;
1034         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1035                 return 0;
1036         return port->xmit_cnt;
1037 }
1038
1039 /* ioctl et all */
1040 static int isicom_send_break(struct tty_struct *tty, int length)
1041 {
1042         struct isi_port *port = tty->driver_data;
1043         struct isi_board *card = port->card;
1044         unsigned long base = card->base;
1045
1046         if (length == -1)
1047                 return -EOPNOTSUPP;
1048
1049         if (!lock_card(card))
1050                 return -EINVAL;
1051
1052         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1053         outw((length & 0xff) << 8 | 0x00, base);
1054         outw((length & 0xff00), base);
1055         InterruptTheCard(base);
1056
1057         unlock_card(card);
1058         return 0;
1059 }
1060
1061 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1062 {
1063         struct isi_port *port = tty->driver_data;
1064         /* just send the port status */
1065         u16 status = port->status;
1066
1067         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1068                 return -ENODEV;
1069
1070         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1071                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1072                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1073                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1074                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1075                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1076 }
1077
1078 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1079         unsigned int set, unsigned int clear)
1080 {
1081         struct isi_port *port = tty->driver_data;
1082         unsigned long flags;
1083
1084         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1085                 return -ENODEV;
1086
1087         spin_lock_irqsave(&port->card->card_lock, flags);
1088         if (set & TIOCM_RTS)
1089                 raise_rts(port);
1090         if (set & TIOCM_DTR)
1091                 raise_dtr(port);
1092
1093         if (clear & TIOCM_RTS)
1094                 drop_rts(port);
1095         if (clear & TIOCM_DTR)
1096                 drop_dtr(port);
1097         spin_unlock_irqrestore(&port->card->card_lock, flags);
1098
1099         return 0;
1100 }
1101
1102 static int isicom_set_serial_info(struct tty_struct *tty,
1103                                         struct serial_struct __user *info)
1104 {
1105         struct isi_port *port = tty->driver_data;
1106         struct serial_struct newinfo;
1107         int reconfig_port;
1108
1109         if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1110                 return -EFAULT;
1111
1112         lock_kernel();
1113
1114         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1115                 (newinfo.flags & ASYNC_SPD_MASK));
1116
1117         if (!capable(CAP_SYS_ADMIN)) {
1118                 if ((newinfo.close_delay != port->port.close_delay) ||
1119                                 (newinfo.closing_wait != port->port.closing_wait) ||
1120                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1121                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1122                         unlock_kernel();
1123                         return -EPERM;
1124                 }
1125                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1126                                 (newinfo.flags & ASYNC_USR_MASK));
1127         } else {
1128                 port->port.close_delay = newinfo.close_delay;
1129                 port->port.closing_wait = newinfo.closing_wait;
1130                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1131                                 (newinfo.flags & ASYNC_FLAGS));
1132         }
1133         if (reconfig_port) {
1134                 unsigned long flags;
1135                 spin_lock_irqsave(&port->card->card_lock, flags);
1136                 isicom_config_port(tty);
1137                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1138         }
1139         unlock_kernel();
1140         return 0;
1141 }
1142
1143 static int isicom_get_serial_info(struct isi_port *port,
1144         struct serial_struct __user *info)
1145 {
1146         struct serial_struct out_info;
1147
1148         lock_kernel();
1149         memset(&out_info, 0, sizeof(out_info));
1150 /*      out_info.type = ? */
1151         out_info.line = port - isi_ports;
1152         out_info.port = port->card->base;
1153         out_info.irq = port->card->irq;
1154         out_info.flags = port->port.flags;
1155 /*      out_info.baud_base = ? */
1156         out_info.close_delay = port->port.close_delay;
1157         out_info.closing_wait = port->port.closing_wait;
1158         unlock_kernel();
1159         if (copy_to_user(info, &out_info, sizeof(out_info)))
1160                 return -EFAULT;
1161         return 0;
1162 }
1163
1164 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1165         unsigned int cmd, unsigned long arg)
1166 {
1167         struct isi_port *port = tty->driver_data;
1168         void __user *argp = (void __user *)arg;
1169
1170         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1171                 return -ENODEV;
1172
1173         switch (cmd) {
1174         case TIOCGSERIAL:
1175                 return isicom_get_serial_info(port, argp);
1176
1177         case TIOCSSERIAL:
1178                 return isicom_set_serial_info(tty, argp);
1179
1180         default:
1181                 return -ENOIOCTLCMD;
1182         }
1183         return 0;
1184 }
1185
1186 /* set_termios et all */
1187 static void isicom_set_termios(struct tty_struct *tty,
1188         struct ktermios *old_termios)
1189 {
1190         struct isi_port *port = tty->driver_data;
1191         unsigned long flags;
1192
1193         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1194                 return;
1195
1196         if (tty->termios->c_cflag == old_termios->c_cflag &&
1197                         tty->termios->c_iflag == old_termios->c_iflag)
1198                 return;
1199
1200         spin_lock_irqsave(&port->card->card_lock, flags);
1201         isicom_config_port(tty);
1202         spin_unlock_irqrestore(&port->card->card_lock, flags);
1203
1204         if ((old_termios->c_cflag & CRTSCTS) &&
1205                         !(tty->termios->c_cflag & CRTSCTS)) {
1206                 tty->hw_stopped = 0;
1207                 isicom_start(tty);
1208         }
1209 }
1210
1211 /* throttle et all */
1212 static void isicom_throttle(struct tty_struct *tty)
1213 {
1214         struct isi_port *port = tty->driver_data;
1215         struct isi_board *card = port->card;
1216
1217         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1218                 return;
1219
1220         /* tell the card that this port cannot handle any more data for now */
1221         card->port_status &= ~(1 << port->channel);
1222         outw(card->port_status, card->base + 0x02);
1223 }
1224
1225 /* unthrottle et all */
1226 static void isicom_unthrottle(struct tty_struct *tty)
1227 {
1228         struct isi_port *port = tty->driver_data;
1229         struct isi_board *card = port->card;
1230
1231         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1232                 return;
1233
1234         /* tell the card that this port is ready to accept more data */
1235         card->port_status |= (1 << port->channel);
1236         outw(card->port_status, card->base + 0x02);
1237 }
1238
1239 /* stop et all */
1240 static void isicom_stop(struct tty_struct *tty)
1241 {
1242         struct isi_port *port = tty->driver_data;
1243
1244         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1245                 return;
1246
1247         /* this tells the transmitter not to consider this port for
1248            data output to the card. */
1249         port->status &= ~ISI_TXOK;
1250 }
1251
1252 /* start et all */
1253 static void isicom_start(struct tty_struct *tty)
1254 {
1255         struct isi_port *port = tty->driver_data;
1256
1257         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1258                 return;
1259
1260         /* this tells the transmitter to consider this port for
1261            data output to the card. */
1262         port->status |= ISI_TXOK;
1263 }
1264
1265 static void isicom_hangup(struct tty_struct *tty)
1266 {
1267         struct isi_port *port = tty->driver_data;
1268
1269         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1270                 return;
1271         tty_port_hangup(&port->port);
1272 }
1273
1274
1275 /*
1276  * Driver init and deinit functions
1277  */
1278
1279 static const struct tty_operations isicom_ops = {
1280         .open                   = isicom_open,
1281         .close                  = isicom_close,
1282         .write                  = isicom_write,
1283         .put_char               = isicom_put_char,
1284         .flush_chars            = isicom_flush_chars,
1285         .write_room             = isicom_write_room,
1286         .chars_in_buffer        = isicom_chars_in_buffer,
1287         .ioctl                  = isicom_ioctl,
1288         .set_termios            = isicom_set_termios,
1289         .throttle               = isicom_throttle,
1290         .unthrottle             = isicom_unthrottle,
1291         .stop                   = isicom_stop,
1292         .start                  = isicom_start,
1293         .hangup                 = isicom_hangup,
1294         .flush_buffer           = isicom_flush_buffer,
1295         .tiocmget               = isicom_tiocmget,
1296         .tiocmset               = isicom_tiocmset,
1297         .break_ctl              = isicom_send_break,
1298 };
1299
1300 static const struct tty_port_operations isicom_port_ops = {
1301         .carrier_raised         = isicom_carrier_raised,
1302         .dtr_rts                = isicom_dtr_rts,
1303         .activate               = isicom_activate,
1304         .shutdown               = isicom_shutdown,
1305 };
1306
1307 static int __devinit reset_card(struct pci_dev *pdev,
1308         const unsigned int card, unsigned int *signature)
1309 {
1310         struct isi_board *board = pci_get_drvdata(pdev);
1311         unsigned long base = board->base;
1312         unsigned int sig, portcount = 0;
1313         int retval = 0;
1314
1315         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1316                 base);
1317
1318         inw(base + 0x8);
1319
1320         msleep(10);
1321
1322         outw(0, base + 0x8); /* Reset */
1323
1324         msleep(1000);
1325
1326         sig = inw(base + 0x4) & 0xff;
1327
1328         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1329                         sig != 0xee) {
1330                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1331                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1332                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1333                 retval = -EIO;
1334                 goto end;
1335         }
1336
1337         msleep(10);
1338
1339         portcount = inw(base + 0x2);
1340         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1341                                 portcount != 8 && portcount != 16)) {
1342                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1343                         card + 1);
1344                 retval = -EIO;
1345                 goto end;
1346         }
1347
1348         switch (sig) {
1349         case 0xa5:
1350         case 0xbb:
1351         case 0xdd:
1352                 board->port_count = (portcount == 4) ? 4 : 8;
1353                 board->shift_count = 12;
1354                 break;
1355         case 0xcc:
1356         case 0xee:
1357                 board->port_count = 16;
1358                 board->shift_count = 11;
1359                 break;
1360         }
1361         dev_info(&pdev->dev, "-Done\n");
1362         *signature = sig;
1363
1364 end:
1365         return retval;
1366 }
1367
1368 static int __devinit load_firmware(struct pci_dev *pdev,
1369         const unsigned int index, const unsigned int signature)
1370 {
1371         struct isi_board *board = pci_get_drvdata(pdev);
1372         const struct firmware *fw;
1373         unsigned long base = board->base;
1374         unsigned int a;
1375         u16 word_count, status;
1376         int retval = -EIO;
1377         char *name;
1378         u8 *data;
1379
1380         struct stframe {
1381                 u16     addr;
1382                 u16     count;
1383                 u8      data[0];
1384         } *frame;
1385
1386         switch (signature) {
1387         case 0xa5:
1388                 name = "isi608.bin";
1389                 break;
1390         case 0xbb:
1391                 name = "isi608em.bin";
1392                 break;
1393         case 0xcc:
1394                 name = "isi616em.bin";
1395                 break;
1396         case 0xdd:
1397                 name = "isi4608.bin";
1398                 break;
1399         case 0xee:
1400                 name = "isi4616.bin";
1401                 break;
1402         default:
1403                 dev_err(&pdev->dev, "Unknown signature.\n");
1404                 goto end;
1405         }
1406
1407         retval = request_firmware(&fw, name, &pdev->dev);
1408         if (retval)
1409                 goto end;
1410
1411         retval = -EIO;
1412
1413         for (frame = (struct stframe *)fw->data;
1414                         frame < (struct stframe *)(fw->data + fw->size);
1415                         frame = (struct stframe *)((u8 *)(frame + 1) +
1416                                 frame->count)) {
1417                 if (WaitTillCardIsFree(base))
1418                         goto errrelfw;
1419
1420                 outw(0xf0, base);       /* start upload sequence */
1421                 outw(0x00, base);
1422                 outw(frame->addr, base); /* lsb of address */
1423
1424                 word_count = frame->count / 2 + frame->count % 2;
1425                 outw(word_count, base);
1426                 InterruptTheCard(base);
1427
1428                 udelay(100); /* 0x2f */
1429
1430                 if (WaitTillCardIsFree(base))
1431                         goto errrelfw;
1432
1433                 status = inw(base + 0x4);
1434                 if (status != 0) {
1435                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1436                                  "Address:0x%x\n"
1437                                  "Count:0x%x\n"
1438                                  "Status:0x%x\n",
1439                                  index + 1, frame->addr, frame->count, status);
1440                         goto errrelfw;
1441                 }
1442                 outsw(base, frame->data, word_count);
1443
1444                 InterruptTheCard(base);
1445
1446                 udelay(50); /* 0x0f */
1447
1448                 if (WaitTillCardIsFree(base))
1449                         goto errrelfw;
1450
1451                 status = inw(base + 0x4);
1452                 if (status != 0) {
1453                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1454                                 "Status:0x%x\n", index + 1, status);
1455                         goto errrelfw;
1456                 }
1457         }
1458
1459 /* XXX: should we test it by reading it back and comparing with original like
1460  * in load firmware package? */
1461         for (frame = (struct stframe *)fw->data;
1462                         frame < (struct stframe *)(fw->data + fw->size);
1463                         frame = (struct stframe *)((u8 *)(frame + 1) +
1464                                 frame->count)) {
1465                 if (WaitTillCardIsFree(base))
1466                         goto errrelfw;
1467
1468                 outw(0xf1, base); /* start download sequence */
1469                 outw(0x00, base);
1470                 outw(frame->addr, base); /* lsb of address */
1471
1472                 word_count = (frame->count >> 1) + frame->count % 2;
1473                 outw(word_count + 1, base);
1474                 InterruptTheCard(base);
1475
1476                 udelay(50); /* 0xf */
1477
1478                 if (WaitTillCardIsFree(base))
1479                         goto errrelfw;
1480
1481                 status = inw(base + 0x4);
1482                 if (status != 0) {
1483                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1484                                  "Address:0x%x\n"
1485                                  "Count:0x%x\n"
1486                                  "Status: 0x%x\n",
1487                                  index + 1, frame->addr, frame->count, status);
1488                         goto errrelfw;
1489                 }
1490
1491                 data = kmalloc(word_count * 2, GFP_KERNEL);
1492                 if (data == NULL) {
1493                         dev_err(&pdev->dev, "Card%d, firmware upload "
1494                                 "failed, not enough memory\n", index + 1);
1495                         goto errrelfw;
1496                 }
1497                 inw(base);
1498                 insw(base, data, word_count);
1499                 InterruptTheCard(base);
1500
1501                 for (a = 0; a < frame->count; a++)
1502                         if (data[a] != frame->data[a]) {
1503                                 kfree(data);
1504                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1505                                         "failed\n", index + 1);
1506                                 goto errrelfw;
1507                         }
1508                 kfree(data);
1509
1510                 udelay(50); /* 0xf */
1511
1512                 if (WaitTillCardIsFree(base))
1513                         goto errrelfw;
1514
1515                 status = inw(base + 0x4);
1516                 if (status != 0) {
1517                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1518                                 "Card Status:0x%x\n", index + 1, status);
1519                         goto errrelfw;
1520                 }
1521         }
1522
1523         /* xfer ctrl */
1524         if (WaitTillCardIsFree(base))
1525                 goto errrelfw;
1526
1527         outw(0xf2, base);
1528         outw(0x800, base);
1529         outw(0x0, base);
1530         outw(0x0, base);
1531         InterruptTheCard(base);
1532         outw(0x0, base + 0x4); /* for ISI4608 cards */
1533
1534         board->status |= FIRMWARE_LOADED;
1535         retval = 0;
1536
1537 errrelfw:
1538         release_firmware(fw);
1539 end:
1540         return retval;
1541 }
1542
1543 /*
1544  *      Insmod can set static symbols so keep these static
1545  */
1546 static unsigned int card_count;
1547
1548 static int __devinit isicom_probe(struct pci_dev *pdev,
1549         const struct pci_device_id *ent)
1550 {
1551         unsigned int uninitialized_var(signature), index;
1552         int retval = -EPERM;
1553         struct isi_board *board = NULL;
1554
1555         if (card_count >= BOARD_COUNT)
1556                 goto err;
1557
1558         retval = pci_enable_device(pdev);
1559         if (retval) {
1560                 dev_err(&pdev->dev, "failed to enable\n");
1561                 goto err;
1562         }
1563
1564         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1565
1566         /* allot the first empty slot in the array */
1567         for (index = 0; index < BOARD_COUNT; index++)
1568                 if (isi_card[index].base == 0) {
1569                         board = &isi_card[index];
1570                         break;
1571                 }
1572
1573         board->index = index;
1574         board->base = pci_resource_start(pdev, 3);
1575         board->irq = pdev->irq;
1576         card_count++;
1577
1578         pci_set_drvdata(pdev, board);
1579
1580         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1581         if (retval) {
1582                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1583                         "will be disabled.\n", board->base, board->base + 15,
1584                         index + 1);
1585                 retval = -EBUSY;
1586                 goto errdec;
1587         }
1588
1589         retval = request_irq(board->irq, isicom_interrupt,
1590                         IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1591         if (retval < 0) {
1592                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1593                         "Card%d will be disabled.\n", board->irq, index + 1);
1594                 goto errunrr;
1595         }
1596
1597         retval = reset_card(pdev, index, &signature);
1598         if (retval < 0)
1599                 goto errunri;
1600
1601         retval = load_firmware(pdev, index, signature);
1602         if (retval < 0)
1603                 goto errunri;
1604
1605         for (index = 0; index < board->port_count; index++)
1606                 tty_register_device(isicom_normal, board->index * 16 + index,
1607                                 &pdev->dev);
1608
1609         return 0;
1610
1611 errunri:
1612         free_irq(board->irq, board);
1613 errunrr:
1614         pci_release_region(pdev, 3);
1615 errdec:
1616         board->base = 0;
1617         card_count--;
1618         pci_disable_device(pdev);
1619 err:
1620         return retval;
1621 }
1622
1623 static void __devexit isicom_remove(struct pci_dev *pdev)
1624 {
1625         struct isi_board *board = pci_get_drvdata(pdev);
1626         unsigned int i;
1627
1628         for (i = 0; i < board->port_count; i++)
1629                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1630
1631         free_irq(board->irq, board);
1632         pci_release_region(pdev, 3);
1633         board->base = 0;
1634         card_count--;
1635         pci_disable_device(pdev);
1636 }
1637
1638 static int __init isicom_init(void)
1639 {
1640         int retval, idx, channel;
1641         struct isi_port *port;
1642
1643         for (idx = 0; idx < BOARD_COUNT; idx++) {
1644                 port = &isi_ports[idx * 16];
1645                 isi_card[idx].ports = port;
1646                 spin_lock_init(&isi_card[idx].card_lock);
1647                 for (channel = 0; channel < 16; channel++, port++) {
1648                         tty_port_init(&port->port);
1649                         port->port.ops = &isicom_port_ops;
1650                         port->magic = ISICOM_MAGIC;
1651                         port->card = &isi_card[idx];
1652                         port->channel = channel;
1653                         port->port.close_delay = 50 * HZ/100;
1654                         port->port.closing_wait = 3000 * HZ/100;
1655                         port->status = 0;
1656                         /*  . . .  */
1657                 }
1658                 isi_card[idx].base = 0;
1659                 isi_card[idx].irq = 0;
1660         }
1661
1662         /* tty driver structure initialization */
1663         isicom_normal = alloc_tty_driver(PORT_COUNT);
1664         if (!isicom_normal) {
1665                 retval = -ENOMEM;
1666                 goto error;
1667         }
1668
1669         isicom_normal->owner                    = THIS_MODULE;
1670         isicom_normal->name                     = "ttyM";
1671         isicom_normal->major                    = ISICOM_NMAJOR;
1672         isicom_normal->minor_start              = 0;
1673         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1674         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1675         isicom_normal->init_termios             = tty_std_termios;
1676         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1677                 CLOCAL;
1678         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1679                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1680         tty_set_operations(isicom_normal, &isicom_ops);
1681
1682         retval = tty_register_driver(isicom_normal);
1683         if (retval) {
1684                 pr_dbg("Couldn't register the dialin driver\n");
1685                 goto err_puttty;
1686         }
1687
1688         retval = pci_register_driver(&isicom_driver);
1689         if (retval < 0) {
1690                 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1691                 goto err_unrtty;
1692         }
1693
1694         mod_timer(&tx, jiffies + 1);
1695
1696         return 0;
1697 err_unrtty:
1698         tty_unregister_driver(isicom_normal);
1699 err_puttty:
1700         put_tty_driver(isicom_normal);
1701 error:
1702         return retval;
1703 }
1704
1705 static void __exit isicom_exit(void)
1706 {
1707         del_timer_sync(&tx);
1708
1709         pci_unregister_driver(&isicom_driver);
1710         tty_unregister_driver(isicom_normal);
1711         put_tty_driver(isicom_normal);
1712 }
1713
1714 module_init(isicom_init);
1715 module_exit(isicom_exit);
1716
1717 MODULE_AUTHOR("MultiTech");
1718 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1719 MODULE_LICENSE("GPL");