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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 117
 118 #include <linux/module.h>
 119 #include <linux/firmware.h>
 120 #include <linux/kernel.h>
 121 #include <linux/tty.h>
 122 #include <linux/tty_flip.h>
 123 #include <linux/termios.h>
 124 #include <linux/fs.h>
 125 #include <linux/sched.h>
 126 #include <linux/serial.h>
 127 #include <linux/smp_lock.h>
 128 #include <linux/mm.h>
 129 #include <linux/interrupt.h>
 130 #include <linux/timer.h>
 131 #include <linux/delay.h>
 132 #include <linux/ioport.h>
 133 #include <linux/slab.h>
 134
 135 #include <linux/uaccess.h>
 136 #include <linux/io.h>
 137 #include <asm/system.h>
 138
 139 #include <linux/pci.h>
 140
 141 #include <linux/isicom.h>
 142
 143 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 144 #define ClearInterrupt(base) inw((base) + 0x0a)
 145
 146 #ifdef DEBUG
 147 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 148 #else
 149 #define isicom_paranoia_check(a, b, c) 0
 150 #endif
 151
 152 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 153 static void __devexit isicom_remove(struct pci_dev *);
 154
 155 static struct pci_device_id isicom_pci_tbl[] = {
 156         { PCI_DEVICE(VENDOR_ID, 0x2028) },
 157         { PCI_DEVICE(VENDOR_ID, 0x2051) },
 158         { PCI_DEVICE(VENDOR_ID, 0x2052) },
 159         { PCI_DEVICE(VENDOR_ID, 0x2053) },
 160         { PCI_DEVICE(VENDOR_ID, 0x2054) },
 161         { PCI_DEVICE(VENDOR_ID, 0x2055) },
 162         { PCI_DEVICE(VENDOR_ID, 0x2056) },
 163         { PCI_DEVICE(VENDOR_ID, 0x2057) },
 164         { PCI_DEVICE(VENDOR_ID, 0x2058) },
 165         { 0 }
 166 };
 167 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 168
 169 static struct pci_driver isicom_driver = {
 170         .name           = "isicom",
 171         .id_table       = isicom_pci_tbl,
 172         .probe          = isicom_probe,
 173         .remove         = __devexit_p(isicom_remove)
 174 };
 175
 176 static int prev_card = 3;       /*      start servicing isi_card[0]     */
 177 static struct tty_driver *isicom_normal;
 178
 179 static void isicom_tx(unsigned long _data);
 180 static void isicom_start(struct tty_struct *tty);
 181
 182 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
 183
 184 /*   baud index mappings from linux defns to isi */
 185
 186 static signed char linuxb_to_isib[] = {
 187         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 188 };
 189
 190 struct  isi_board {
 191         unsigned long           base;
 192         int                     irq;
 193         unsigned char           port_count;
 194         unsigned short          status;
 195         unsigned short          port_status; /* each bit for each port */
 196         unsigned short          shift_count;
 197         struct isi_port         *ports;
 198         signed char             count;
 199         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 200         unsigned long           flags;
 201         unsigned int            index;
 202 };
 203
 204 struct  isi_port {
 205         unsigned short          magic;
 206         struct tty_port         port;
 207         u16                     channel;
 208         u16                     status;
 209         struct isi_board        *card;
 210         unsigned char           *xmit_buf;
 211         int                     xmit_head;
 212         int                     xmit_tail;
 213         int                     xmit_cnt;
 214 };
 215
 216 static struct isi_board isi_card[BOARD_COUNT];
 217 static struct isi_port  isi_ports[PORT_COUNT];
 218
 219 /*
 220  *      Locking functions for card level locking. We need to own both
 221  *      the kernel lock for the card and have the card in a position that
 222  *      it wants to talk.
 223  */
 224
 225 static inline int WaitTillCardIsFree(unsigned long base)
 226 {
 227         unsigned int count = 0;
 228         unsigned int a = in_atomic(); /* do we run under spinlock? */
 229
 230         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 231                 if (a)
 232                         mdelay(1);
 233                 else
 234                         msleep(1);
 235
 236         return !(inw(base + 0xe) & 0x1);
 237 }
 238
 239 static int lock_card(struct isi_board *card)
 240 {
 241         unsigned long base = card->base;
 242         unsigned int retries, a;
 243
 244         for (retries = 0; retries < 10; retries++) {
 245                 spin_lock_irqsave(&card->card_lock, card->flags);
 246                 for (a = 0; a < 10; a++) {
 247                         if (inw(base + 0xe) & 0x1)
 248                                 return 1;
 249                         udelay(10);
 250                 }
 251                 spin_unlock_irqrestore(&card->card_lock, card->flags);
 252                 msleep(10);
 253         }
 254         pr_warning("Failed to lock Card (0x%lx)\n", card->base);
 255
 256         return 0;       /* Failed to acquire the card! */
 257 }
 258
 259 static void unlock_card(struct isi_board *card)
 260 {
 261         spin_unlock_irqrestore(&card->card_lock, card->flags);
 262 }
 263
 264 /*
 265  *  ISI Card specific ops ...
 266  */
 267
 268 /* card->lock HAS to be held */
 269 static void raise_dtr(struct isi_port *port)
 270 {
 271         struct isi_board *card = port->card;
 272         unsigned long base = card->base;
 273         u16 channel = port->channel;
 274
 275         if (WaitTillCardIsFree(base))
 276                 return;
 277
 278         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 279         outw(0x0504, base);
 280         InterruptTheCard(base);
 281         port->status |= ISI_DTR;
 282 }
 283
 284 /* card->lock HAS to be held */
 285 static inline void drop_dtr(struct isi_port *port)
 286 {
 287         struct isi_board *card = port->card;
 288         unsigned long base = card->base;
 289         u16 channel = port->channel;
 290
 291         if (WaitTillCardIsFree(base))
 292                 return;
 293
 294         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 295         outw(0x0404, base);
 296         InterruptTheCard(base);
 297         port->status &= ~ISI_DTR;
 298 }
 299
 300 /* card->lock HAS to be held */
 301 static inline void raise_rts(struct isi_port *port)
 302 {
 303         struct isi_board *card = port->card;
 304         unsigned long base = card->base;
 305         u16 channel = port->channel;
 306
 307         if (WaitTillCardIsFree(base))
 308                 return;
 309
 310         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 311         outw(0x0a04, base);
 312         InterruptTheCard(base);
 313         port->status |= ISI_RTS;
 314 }
 315
 316 /* card->lock HAS to be held */
 317 static inline void drop_rts(struct isi_port *port)
 318 {
 319         struct isi_board *card = port->card;
 320         unsigned long base = card->base;
 321         u16 channel = port->channel;
 322
 323         if (WaitTillCardIsFree(base))
 324                 return;
 325
 326         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 327         outw(0x0804, base);
 328         InterruptTheCard(base);
 329         port->status &= ~ISI_RTS;
 330 }
 331
 332 /* card->lock MUST NOT be held */
 333
 334 static void isicom_dtr_rts(struct tty_port *port, int on)
 335 {
 336         struct isi_port *ip = container_of(port, struct isi_port, port);
 337         struct isi_board *card = ip->card;
 338         unsigned long base = card->base;
 339         u16 channel = ip->channel;
 340
 341         if (!lock_card(card))
 342                 return;
 343
 344         if (on) {
 345                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 346                 outw(0x0f04, base);
 347                 InterruptTheCard(base);
 348                 ip->status |= (ISI_DTR | ISI_RTS);
 349         } else {
 350                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 351                 outw(0x0C04, base);
 352                 InterruptTheCard(base);
 353                 ip->status &= ~(ISI_DTR | ISI_RTS);
 354         }
 355         unlock_card(card);
 356 }
 357
 358 /* card->lock HAS to be held */
 359 static void drop_dtr_rts(struct isi_port *port)
 360 {
 361         struct isi_board *card = port->card;
 362         unsigned long base = card->base;
 363         u16 channel = port->channel;
 364
 365         if (WaitTillCardIsFree(base))
 366                 return;
 367
 368         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 369         outw(0x0c04, base);
 370         InterruptTheCard(base);
 371         port->status &= ~(ISI_RTS | ISI_DTR);
 372 }
 373
 374 /*
 375  *      ISICOM Driver specific routines ...
 376  *
 377  */
 378
 379 static inline int __isicom_paranoia_check(struct isi_port const *port,
 380         char *name, const char *routine)
 381 {
 382         if (!port) {
 383                 pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
 384                            name, routine);
 385                 return 1;
 386         }
 387         if (port->magic != ISICOM_MAGIC) {
 388                 pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
 389                            name, routine);
 390                 return 1;
 391         }
 392
 393         return 0;
 394 }
 395
 396 /*
 397  *      Transmitter.
 398  *
 399  *      We shovel data into the card buffers on a regular basis. The card
 400  *      will do the rest of the work for us.
 401  */
 402
 403 static void isicom_tx(unsigned long _data)
 404 {
 405         unsigned long flags, base;
 406         unsigned int retries;
 407         short count = (BOARD_COUNT-1), card;
 408         short txcount, wrd, residue, word_count, cnt;
 409         struct isi_port *port;
 410         struct tty_struct *tty;
 411
 412         /*      find next active board  */
 413         card = (prev_card + 1) & 0x0003;
 414         while (count-- > 0) {
 415                 if (isi_card[card].status & BOARD_ACTIVE)
 416                         break;
 417                 card = (card + 1) & 0x0003;
 418         }
 419         if (!(isi_card[card].status & BOARD_ACTIVE))
 420                 goto sched_again;
 421
 422         prev_card = card;
 423
 424         count = isi_card[card].port_count;
 425         port = isi_card[card].ports;
 426         base = isi_card[card].base;
 427
 428         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 429         for (retries = 0; retries < 100; retries++) {
 430                 if (inw(base + 0xe) & 0x1)
 431                         break;
 432                 udelay(2);
 433         }
 434         if (retries >= 100)
 435                 goto unlock;
 436
 437         tty = tty_port_tty_get(&port->port);
 438         if (tty == NULL)
 439                 goto put_unlock;
 440
 441         for (; count > 0; count--, port++) {
 442                 /* port not active or tx disabled to force flow control */
 443                 if (!(port->port.flags & ASYNC_INITIALIZED) ||
 444                                 !(port->status & ISI_TXOK))
 445                         continue;
 446
 447                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 448                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 449                         continue;
 450
 451                 if (!(inw(base + 0x02) & (1 << port->channel)))
 452                         continue;
 453
 454                 pr_debug("txing %d bytes, port%d.\n",
 455                          txcount, port->channel + 1);
 456                 outw((port->channel << isi_card[card].shift_count) | txcount,
 457                         base);
 458                 residue = NO;
 459                 wrd = 0;
 460                 while (1) {
 461                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 462                                         - port->xmit_tail));
 463                         if (residue == YES) {
 464                                 residue = NO;
 465                                 if (cnt > 0) {
 466                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 467                                                                         << 8);
 468                                         port->xmit_tail = (port->xmit_tail + 1)
 469                                                 & (SERIAL_XMIT_SIZE - 1);
 470                                         port->xmit_cnt--;
 471                                         txcount--;
 472                                         cnt--;
 473                                         outw(wrd, base);
 474                                 } else {
 475                                         outw(wrd, base);
 476                                         break;
 477                                 }
 478                         }
 479                         if (cnt <= 0)
 480                                 break;
 481                         word_count = cnt >> 1;
 482                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 483                         port->xmit_tail = (port->xmit_tail
 484                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 485                         txcount -= (word_count << 1);
 486                         port->xmit_cnt -= (word_count << 1);
 487                         if (cnt & 0x0001) {
 488                                 residue = YES;
 489                                 wrd = port->port.xmit_buf[port->xmit_tail];
 490                                 port->xmit_tail = (port->xmit_tail + 1)
 491                                         & (SERIAL_XMIT_SIZE - 1);
 492                                 port->xmit_cnt--;
 493                                 txcount--;
 494                         }
 495                 }
 496
 497                 InterruptTheCard(base);
 498                 if (port->xmit_cnt <= 0)
 499                         port->status &= ~ISI_TXOK;
 500                 if (port->xmit_cnt <= WAKEUP_CHARS)
 501                         tty_wakeup(tty);
 502         }
 503
 504 put_unlock:
 505         tty_kref_put(tty);
 506 unlock:
 507         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 508         /*      schedule another tx for hopefully in about 10ms */
 509 sched_again:
 510         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 511 }
 512
 513 /*
 514  *      Main interrupt handler routine
 515  */
 516
 517 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 518 {
 519         struct isi_board *card = dev_id;
 520         struct isi_port *port;
 521         struct tty_struct *tty;
 522         unsigned long base;
 523         u16 header, word_count, count, channel;
 524         short byte_count;
 525         unsigned char *rp;
 526
 527         if (!card || !(card->status & FIRMWARE_LOADED))
 528                 return IRQ_NONE;
 529
 530         base = card->base;
 531
 532         /* did the card interrupt us? */
 533         if (!(inw(base + 0x0e) & 0x02))
 534                 return IRQ_NONE;
 535
 536         spin_lock(&card->card_lock);
 537
 538         /*
 539          * disable any interrupts from the PCI card and lower the
 540          * interrupt line
 541          */
 542         outw(0x8000, base+0x04);
 543         ClearInterrupt(base);
 544
 545         inw(base);              /* get the dummy word out */
 546         header = inw(base);
 547         channel = (header & 0x7800) >> card->shift_count;
 548         byte_count = header & 0xff;
 549
 550         if (channel + 1 > card->port_count) {
 551                 pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
 552                            __func__, base, channel+1);
 553                 outw(0x0000, base+0x04); /* enable interrupts */
 554                 spin_unlock(&card->card_lock);
 555                 return IRQ_HANDLED;
 556         }
 557         port = card->ports + channel;
 558         if (!(port->port.flags & ASYNC_INITIALIZED)) {
 559                 outw(0x0000, base+0x04); /* enable interrupts */
 560                 spin_unlock(&card->card_lock);
 561                 return IRQ_HANDLED;
 562         }
 563
 564         tty = tty_port_tty_get(&port->port);
 565         if (tty == NULL) {
 566                 word_count = byte_count >> 1;
 567                 while (byte_count > 1) {
 568                         inw(base);
 569                         byte_count -= 2;
 570                 }
 571                 if (byte_count & 0x01)
 572                         inw(base);
 573                 outw(0x0000, base+0x04); /* enable interrupts */
 574                 spin_unlock(&card->card_lock);
 575                 return IRQ_HANDLED;
 576         }
 577
 578         if (header & 0x8000) {          /* Status Packet */
 579                 header = inw(base);
 580                 switch (header & 0xff) {
 581                 case 0: /* Change in EIA signals */
 582                         if (port->port.flags & ASYNC_CHECK_CD) {
 583                                 if (port->status & ISI_DCD) {
 584                                         if (!(header & ISI_DCD)) {
 585                                         /* Carrier has been lost  */
 586                                                 pr_debug("%s: DCD->low.\n",
 587                                                          __func__);
 588                                                 port->status &= ~ISI_DCD;
 589                                                 tty_hangup(tty);
 590                                         }
 591                                 } else if (header & ISI_DCD) {
 592                                 /* Carrier has been detected */
 593                                         pr_debug("%s: DCD->high.\n",
 594                                                 __func__);
 595                                         port->status |= ISI_DCD;
 596                                         wake_up_interruptible(&port->port.open_wait);
 597                                 }
 598                         } else {
 599                                 if (header & ISI_DCD)
 600                                         port->status |= ISI_DCD;
 601                                 else
 602                                         port->status &= ~ISI_DCD;
 603                         }
 604
 605                         if (port->port.flags & ASYNC_CTS_FLOW) {
 606                                 if (tty->hw_stopped) {
 607                                         if (header & ISI_CTS) {
 608                                                 port->port.tty->hw_stopped = 0;
 609                                                 /* start tx ing */
 610                                                 port->status |= (ISI_TXOK
 611                                                         | ISI_CTS);
 612                                                 tty_wakeup(tty);
 613                                         }
 614                                 } else if (!(header & ISI_CTS)) {
 615                                         tty->hw_stopped = 1;
 616                                         /* stop tx ing */
 617                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 618                                 }
 619                         } else {
 620                                 if (header & ISI_CTS)
 621                                         port->status |= ISI_CTS;
 622                                 else
 623                                         port->status &= ~ISI_CTS;
 624                         }
 625
 626                         if (header & ISI_DSR)
 627                                 port->status |= ISI_DSR;
 628                         else
 629                                 port->status &= ~ISI_DSR;
 630
 631                         if (header & ISI_RI)
 632                                 port->status |= ISI_RI;
 633                         else
 634                                 port->status &= ~ISI_RI;
 635
 636                         break;
 637
 638                 case 1: /* Received Break !!! */
 639                         tty_insert_flip_char(tty, 0, TTY_BREAK);
 640                         if (port->port.flags & ASYNC_SAK)
 641                                 do_SAK(tty);
 642                         tty_flip_buffer_push(tty);
 643                         break;
 644
 645                 case 2: /* Statistics            */
 646                         pr_debug("%s: stats!!!\n", __func__);
 647                         break;
 648
 649                 default:
 650                         pr_debug("%s: Unknown code in status packet.\n",
 651                                  __func__);
 652                         break;
 653                 }
 654         } else {                                /* Data   Packet */
 655
 656                 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
 657                 pr_debug("%s: Can rx %d of %d bytes.\n",
 658                          __func__, count, byte_count);
 659                 word_count = count >> 1;
 660                 insw(base, rp, word_count);
 661                 byte_count -= (word_count << 1);
 662                 if (count & 0x0001) {
 663                         tty_insert_flip_char(tty,  inw(base) & 0xff,
 664                                 TTY_NORMAL);
 665                         byte_count -= 2;
 666                 }
 667                 if (byte_count > 0) {
 668                         pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
 669                                  __func__, base, channel + 1);
 670                 /* drain out unread xtra data */
 671                 while (byte_count > 0) {
 672                                 inw(base);
 673                                 byte_count -= 2;
 674                         }
 675                 }
 676                 tty_flip_buffer_push(tty);
 677         }
 678         outw(0x0000, base+0x04); /* enable interrupts */
 679         spin_unlock(&card->card_lock);
 680         tty_kref_put(tty);
 681
 682         return IRQ_HANDLED;
 683 }
 684
 685 static void isicom_config_port(struct tty_struct *tty)
 686 {
 687         struct isi_port *port = tty->driver_data;
 688         struct isi_board *card = port->card;
 689         unsigned long baud;
 690         unsigned long base = card->base;
 691         u16 channel_setup, channel = port->channel,
 692                 shift_count = card->shift_count;
 693         unsigned char flow_ctrl;
 694
 695         /* FIXME: Switch to new tty baud API */
 696         baud = C_BAUD(tty);
 697         if (baud & CBAUDEX) {
 698                 baud &= ~CBAUDEX;
 699
 700                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 701                  *  then the card is programmed for 57.6Kbps or 115Kbps
 702                  *  respectively.
 703                  */
 704
 705                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 706                 if (baud < 1 || baud > 4)
 707                         tty->termios->c_cflag &= ~CBAUDEX;
 708                 else
 709                         baud += 15;
 710         }
 711         if (baud == 15) {
 712
 713                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 714                  *  by the set_serial_info ioctl ... this is done by
 715                  *  the 'setserial' utility.
 716                  */
 717
 718                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 719                         baud++; /*  57.6 Kbps */
 720                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 721                         baud += 2; /*  115  Kbps */
 722                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 723                         baud += 3; /* 230 kbps*/
 724                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 725                         baud += 4; /* 460 kbps*/
 726         }
 727         if (linuxb_to_isib[baud] == -1) {
 728                 /* hang up */
 729                 drop_dtr(port);
 730                 return;
 731         } else
 732                 raise_dtr(port);
 733
 734         if (WaitTillCardIsFree(base) == 0) {
 735                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 736                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 737                 channel_setup = 0;
 738                 switch (C_CSIZE(tty)) {
 739                 case CS5:
 740                         channel_setup |= ISICOM_CS5;
 741                         break;
 742                 case CS6:
 743                         channel_setup |= ISICOM_CS6;
 744                         break;
 745                 case CS7:
 746                         channel_setup |= ISICOM_CS7;
 747                         break;
 748                 case CS8:
 749                         channel_setup |= ISICOM_CS8;
 750                         break;
 751                 }
 752
 753                 if (C_CSTOPB(tty))
 754                         channel_setup |= ISICOM_2SB;
 755                 if (C_PARENB(tty)) {
 756                         channel_setup |= ISICOM_EVPAR;
 757                         if (C_PARODD(tty))
 758                                 channel_setup |= ISICOM_ODPAR;
 759                 }
 760                 outw(channel_setup, base);
 761                 InterruptTheCard(base);
 762         }
 763         if (C_CLOCAL(tty))
 764                 port->port.flags &= ~ASYNC_CHECK_CD;
 765         else
 766                 port->port.flags |= ASYNC_CHECK_CD;
 767
 768         /* flow control settings ...*/
 769         flow_ctrl = 0;
 770         port->port.flags &= ~ASYNC_CTS_FLOW;
 771         if (C_CRTSCTS(tty)) {
 772                 port->port.flags |= ASYNC_CTS_FLOW;
 773                 flow_ctrl |= ISICOM_CTSRTS;
 774         }
 775         if (I_IXON(tty))
 776                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 777         if (I_IXOFF(tty))
 778                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 779
 780         if (WaitTillCardIsFree(base) == 0) {
 781                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 782                 outw(flow_ctrl << 8 | 0x05, base);
 783                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 784                 InterruptTheCard(base);
 785         }
 786
 787         /*      rx enabled -> enable port for rx on the card    */
 788         if (C_CREAD(tty)) {
 789                 card->port_status |= (1 << channel);
 790                 outw(card->port_status, base + 0x02);
 791         }
 792 }
 793
 794 /* open et all */
 795
 796 static inline void isicom_setup_board(struct isi_board *bp)
 797 {
 798         int channel;
 799         struct isi_port *port;
 800
 801         bp->count++;
 802         if (!(bp->status & BOARD_INIT)) {
 803                 port = bp->ports;
 804                 for (channel = 0; channel < bp->port_count; channel++, port++)
 805                         drop_dtr_rts(port);
 806         }
 807         bp->status |= BOARD_ACTIVE | BOARD_INIT;
 808 }
 809
 810 /* Activate and thus setup board are protected from races against shutdown
 811    by the tty_port mutex */
 812
 813 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 814 {
 815         struct isi_port *port = container_of(tport, struct isi_port, port);
 816         struct isi_board *card = port->card;
 817         unsigned long flags;
 818
 819         if (tty_port_alloc_xmit_buf(tport) < 0)
 820                 return -ENOMEM;
 821
 822         spin_lock_irqsave(&card->card_lock, flags);
 823         isicom_setup_board(card);
 824
 825         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 826
 827         /*      discard any residual data       */
 828         if (WaitTillCardIsFree(card->base) == 0) {
 829                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 830                                 card->base);
 831                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 832                 InterruptTheCard(card->base);
 833         }
 834         isicom_config_port(tty);
 835         spin_unlock_irqrestore(&card->card_lock, flags);
 836
 837         return 0;
 838 }
 839
 840 static int isicom_carrier_raised(struct tty_port *port)
 841 {
 842         struct isi_port *ip = container_of(port, struct isi_port, port);
 843         return (ip->status & ISI_DCD)?1 : 0;
 844 }
 845
 846 static struct tty_port *isicom_find_port(struct tty_struct *tty)
 847 {
 848         struct isi_port *port;
 849         struct isi_board *card;
 850         unsigned int board;
 851         int line = tty->index;
 852
 853         if (line < 0 || line > PORT_COUNT-1)
 854                 return NULL;
 855         board = BOARD(line);
 856         card = &isi_card[board];
 857
 858         if (!(card->status & FIRMWARE_LOADED))
 859                 return NULL;
 860
 861         /*  open on a port greater than the port count for the card !!! */
 862         if (line > ((board * 16) + card->port_count - 1))
 863                 return NULL;
 864
 865         port = &isi_ports[line];
 866         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 867                 return NULL;
 868
 869         return &port->port;
 870 }
 871
 872 static int isicom_open(struct tty_struct *tty, struct file *filp)
 873 {
 874         struct isi_port *port;
 875         struct isi_board *card;
 876         struct tty_port *tport;
 877
 878         tport = isicom_find_port(tty);
 879         if (tport == NULL)
 880                 return -ENODEV;
 881         port = container_of(tport, struct isi_port, port);
 882         card = &isi_card[BOARD(tty->index)];
 883
 884         return tty_port_open(tport, tty, filp);
 885 }
 886
 887 /* close et all */
 888
 889 /* card->lock HAS to be held */
 890 static void isicom_shutdown_port(struct isi_port *port)
 891 {
 892         struct isi_board *card = port->card;
 893
 894         if (--card->count < 0) {
 895                 pr_debug("%s: bad board(0x%lx) count %d.\n",
 896                          __func__, card->base, card->count);
 897                 card->count = 0;
 898         }
 899         /* last port was closed, shutdown that board too */
 900         if (!card->count)
 901                 card->status &= BOARD_ACTIVE;
 902 }
 903
 904 static void isicom_flush_buffer(struct tty_struct *tty)
 905 {
 906         struct isi_port *port = tty->driver_data;
 907         struct isi_board *card = port->card;
 908         unsigned long flags;
 909
 910         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 911                 return;
 912
 913         spin_lock_irqsave(&card->card_lock, flags);
 914         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 915         spin_unlock_irqrestore(&card->card_lock, flags);
 916
 917         tty_wakeup(tty);
 918 }
 919
 920 static void isicom_shutdown(struct tty_port *port)
 921 {
 922         struct isi_port *ip = container_of(port, struct isi_port, port);
 923         struct isi_board *card = ip->card;
 924         unsigned long flags;
 925
 926         /* indicate to the card that no more data can be received
 927            on this port */
 928         spin_lock_irqsave(&card->card_lock, flags);
 929         card->port_status &= ~(1 << ip->channel);
 930         outw(card->port_status, card->base + 0x02);
 931         isicom_shutdown_port(ip);
 932         spin_unlock_irqrestore(&card->card_lock, flags);
 933         tty_port_free_xmit_buf(port);
 934 }
 935
 936 static void isicom_close(struct tty_struct *tty, struct file *filp)
 937 {
 938         struct isi_port *ip = tty->driver_data;
 939         struct tty_port *port = &ip->port;
 940         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 941                 return;
 942         tty_port_close(port, tty, filp);
 943 }
 944
 945 /* write et all */
 946 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 947         int count)
 948 {
 949         struct isi_port *port = tty->driver_data;
 950         struct isi_board *card = port->card;
 951         unsigned long flags;
 952         int cnt, total = 0;
 953
 954         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 955                 return 0;
 956
 957         spin_lock_irqsave(&card->card_lock, flags);
 958
 959         while (1) {
 960                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 961                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 962                 if (cnt <= 0)
 963                         break;
 964
 965                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 966                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 967                         - 1);
 968                 port->xmit_cnt += cnt;
 969                 buf += cnt;
 970                 count -= cnt;
 971                 total += cnt;
 972         }
 973         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 974                 port->status |= ISI_TXOK;
 975         spin_unlock_irqrestore(&card->card_lock, flags);
 976         return total;
 977 }
 978
 979 /* put_char et all */
 980 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 981 {
 982         struct isi_port *port = tty->driver_data;
 983         struct isi_board *card = port->card;
 984         unsigned long flags;
 985
 986         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 987                 return 0;
 988
 989         spin_lock_irqsave(&card->card_lock, flags);
 990         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 991                 spin_unlock_irqrestore(&card->card_lock, flags);
 992                 return 0;
 993         }
 994
 995         port->port.xmit_buf[port->xmit_head++] = ch;
 996         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 997         port->xmit_cnt++;
 998         spin_unlock_irqrestore(&card->card_lock, flags);
 999         return 1;
1000 }
1001
1002 /* flush_chars et all */
1003 static void isicom_flush_chars(struct tty_struct *tty)
1004 {
1005         struct isi_port *port = tty->driver_data;
1006
1007         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1008                 return;
1009
1010         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1011                         !port->port.xmit_buf)
1012                 return;
1013
1014         /* this tells the transmitter to consider this port for
1015            data output to the card ... that's the best we can do. */
1016         port->status |= ISI_TXOK;
1017 }
1018
1019 /* write_room et all */
1020 static int isicom_write_room(struct tty_struct *tty)
1021 {
1022         struct isi_port *port = tty->driver_data;
1023         int free;
1024
1025         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1026                 return 0;
1027
1028         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1029         if (free < 0)
1030                 free = 0;
1031         return free;
1032 }
1033
1034 /* chars_in_buffer et all */
1035 static int isicom_chars_in_buffer(struct tty_struct *tty)
1036 {
1037         struct isi_port *port = tty->driver_data;
1038         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1039                 return 0;
1040         return port->xmit_cnt;
1041 }
1042
1043 /* ioctl et all */
1044 static int isicom_send_break(struct tty_struct *tty, int length)
1045 {
1046         struct isi_port *port = tty->driver_data;
1047         struct isi_board *card = port->card;
1048         unsigned long base = card->base;
1049
1050         if (length == -1)
1051                 return -EOPNOTSUPP;
1052
1053         if (!lock_card(card))
1054                 return -EINVAL;
1055
1056         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1057         outw((length & 0xff) << 8 | 0x00, base);
1058         outw((length & 0xff00), base);
1059         InterruptTheCard(base);
1060
1061         unlock_card(card);
1062         return 0;
1063 }
1064
1065 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1066 {
1067         struct isi_port *port = tty->driver_data;
1068         /* just send the port status */
1069         u16 status = port->status;
1070
1071         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1072                 return -ENODEV;
1073
1074         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1075                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1076                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1077                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1078                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1079                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1080 }
1081
1082 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1083         unsigned int set, unsigned int clear)
1084 {
1085         struct isi_port *port = tty->driver_data;
1086         unsigned long flags;
1087
1088         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1089                 return -ENODEV;
1090
1091         spin_lock_irqsave(&port->card->card_lock, flags);
1092         if (set & TIOCM_RTS)
1093                 raise_rts(port);
1094         if (set & TIOCM_DTR)
1095                 raise_dtr(port);
1096
1097         if (clear & TIOCM_RTS)
1098                 drop_rts(port);
1099         if (clear & TIOCM_DTR)
1100                 drop_dtr(port);
1101         spin_unlock_irqrestore(&port->card->card_lock, flags);
1102
1103         return 0;
1104 }
1105
1106 static int isicom_set_serial_info(struct tty_struct *tty,
1107                                         struct serial_struct __user *info)
1108 {
1109         struct isi_port *port = tty->driver_data;
1110         struct serial_struct newinfo;
1111         int reconfig_port;
1112
1113         if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1114                 return -EFAULT;
1115
1116         lock_kernel();
1117
1118         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1119                 (newinfo.flags & ASYNC_SPD_MASK));
1120
1121         if (!capable(CAP_SYS_ADMIN)) {
1122                 if ((newinfo.close_delay != port->port.close_delay) ||
1123                                 (newinfo.closing_wait != port->port.closing_wait) ||
1124                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1125                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1126                         unlock_kernel();
1127                         return -EPERM;
1128                 }
1129                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1130                                 (newinfo.flags & ASYNC_USR_MASK));
1131         } else {
1132                 port->port.close_delay = newinfo.close_delay;
1133                 port->port.closing_wait = newinfo.closing_wait;
1134                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1135                                 (newinfo.flags & ASYNC_FLAGS));
1136         }
1137         if (reconfig_port) {
1138                 unsigned long flags;
1139                 spin_lock_irqsave(&port->card->card_lock, flags);
1140                 isicom_config_port(tty);
1141                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1142         }
1143         unlock_kernel();
1144         return 0;
1145 }
1146
1147 static int isicom_get_serial_info(struct isi_port *port,
1148         struct serial_struct __user *info)
1149 {
1150         struct serial_struct out_info;
1151
1152         lock_kernel();
1153         memset(&out_info, 0, sizeof(out_info));
1154 /*      out_info.type = ? */
1155         out_info.line = port - isi_ports;
1156         out_info.port = port->card->base;
1157         out_info.irq = port->card->irq;
1158         out_info.flags = port->port.flags;
1159 /*      out_info.baud_base = ? */
1160         out_info.close_delay = port->port.close_delay;
1161         out_info.closing_wait = port->port.closing_wait;
1162         unlock_kernel();
1163         if (copy_to_user(info, &out_info, sizeof(out_info)))
1164                 return -EFAULT;
1165         return 0;
1166 }
1167
1168 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1169         unsigned int cmd, unsigned long arg)
1170 {
1171         struct isi_port *port = tty->driver_data;
1172         void __user *argp = (void __user *)arg;
1173
1174         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1175                 return -ENODEV;
1176
1177         switch (cmd) {
1178         case TIOCGSERIAL:
1179                 return isicom_get_serial_info(port, argp);
1180
1181         case TIOCSSERIAL:
1182                 return isicom_set_serial_info(tty, argp);
1183
1184         default:
1185                 return -ENOIOCTLCMD;
1186         }
1187         return 0;
1188 }
1189
1190 /* set_termios et all */
1191 static void isicom_set_termios(struct tty_struct *tty,
1192         struct ktermios *old_termios)
1193 {
1194         struct isi_port *port = tty->driver_data;
1195         unsigned long flags;
1196
1197         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1198                 return;
1199
1200         if (tty->termios->c_cflag == old_termios->c_cflag &&
1201                         tty->termios->c_iflag == old_termios->c_iflag)
1202                 return;
1203
1204         spin_lock_irqsave(&port->card->card_lock, flags);
1205         isicom_config_port(tty);
1206         spin_unlock_irqrestore(&port->card->card_lock, flags);
1207
1208         if ((old_termios->c_cflag & CRTSCTS) &&
1209                         !(tty->termios->c_cflag & CRTSCTS)) {
1210                 tty->hw_stopped = 0;
1211                 isicom_start(tty);
1212         }
1213 }
1214
1215 /* throttle et all */
1216 static void isicom_throttle(struct tty_struct *tty)
1217 {
1218         struct isi_port *port = tty->driver_data;
1219         struct isi_board *card = port->card;
1220
1221         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1222                 return;
1223
1224         /* tell the card that this port cannot handle any more data for now */
1225         card->port_status &= ~(1 << port->channel);
1226         outw(card->port_status, card->base + 0x02);
1227 }
1228
1229 /* unthrottle et all */
1230 static void isicom_unthrottle(struct tty_struct *tty)
1231 {
1232         struct isi_port *port = tty->driver_data;
1233         struct isi_board *card = port->card;
1234
1235         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1236                 return;
1237
1238         /* tell the card that this port is ready to accept more data */
1239         card->port_status |= (1 << port->channel);
1240         outw(card->port_status, card->base + 0x02);
1241 }
1242
1243 /* stop et all */
1244 static void isicom_stop(struct tty_struct *tty)
1245 {
1246         struct isi_port *port = tty->driver_data;
1247
1248         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1249                 return;
1250
1251         /* this tells the transmitter not to consider this port for
1252            data output to the card. */
1253         port->status &= ~ISI_TXOK;
1254 }
1255
1256 /* start et all */
1257 static void isicom_start(struct tty_struct *tty)
1258 {
1259         struct isi_port *port = tty->driver_data;
1260
1261         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1262                 return;
1263
1264         /* this tells the transmitter to consider this port for
1265            data output to the card. */
1266         port->status |= ISI_TXOK;
1267 }
1268
1269 static void isicom_hangup(struct tty_struct *tty)
1270 {
1271         struct isi_port *port = tty->driver_data;
1272
1273         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1274                 return;
1275         tty_port_hangup(&port->port);
1276 }
1277
1278
1279 /*
1280  * Driver init and deinit functions
1281  */
1282
1283 static const struct tty_operations isicom_ops = {
1284         .open                   = isicom_open,
1285         .close                  = isicom_close,
1286         .write                  = isicom_write,
1287         .put_char               = isicom_put_char,
1288         .flush_chars            = isicom_flush_chars,
1289         .write_room             = isicom_write_room,
1290         .chars_in_buffer        = isicom_chars_in_buffer,
1291         .ioctl                  = isicom_ioctl,
1292         .set_termios            = isicom_set_termios,
1293         .throttle               = isicom_throttle,
1294         .unthrottle             = isicom_unthrottle,
1295         .stop                   = isicom_stop,
1296         .start                  = isicom_start,
1297         .hangup                 = isicom_hangup,
1298         .flush_buffer           = isicom_flush_buffer,
1299         .tiocmget               = isicom_tiocmget,
1300         .tiocmset               = isicom_tiocmset,
1301         .break_ctl              = isicom_send_break,
1302 };
1303
1304 static const struct tty_port_operations isicom_port_ops = {
1305         .carrier_raised         = isicom_carrier_raised,
1306         .dtr_rts                = isicom_dtr_rts,
1307         .activate               = isicom_activate,
1308         .shutdown               = isicom_shutdown,
1309 };
1310
1311 static int __devinit reset_card(struct pci_dev *pdev,
1312         const unsigned int card, unsigned int *signature)
1313 {
1314         struct isi_board *board = pci_get_drvdata(pdev);
1315         unsigned long base = board->base;
1316         unsigned int sig, portcount = 0;
1317         int retval = 0;
1318
1319         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1320                 base);
1321
1322         inw(base + 0x8);
1323
1324         msleep(10);
1325
1326         outw(0, base + 0x8); /* Reset */
1327
1328         msleep(1000);
1329
1330         sig = inw(base + 0x4) & 0xff;
1331
1332         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1333                         sig != 0xee) {
1334                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1335                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1336                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1337                 retval = -EIO;
1338                 goto end;
1339         }
1340
1341         msleep(10);
1342
1343         portcount = inw(base + 0x2);
1344         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1345                                 portcount != 8 && portcount != 16)) {
1346                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1347                         card + 1);
1348                 retval = -EIO;
1349                 goto end;
1350         }
1351
1352         switch (sig) {
1353         case 0xa5:
1354         case 0xbb:
1355         case 0xdd:
1356                 board->port_count = (portcount == 4) ? 4 : 8;
1357                 board->shift_count = 12;
1358                 break;
1359         case 0xcc:
1360         case 0xee:
1361                 board->port_count = 16;
1362                 board->shift_count = 11;
1363                 break;
1364         }
1365         dev_info(&pdev->dev, "-Done\n");
1366         *signature = sig;
1367
1368 end:
1369         return retval;
1370 }
1371
1372 static int __devinit load_firmware(struct pci_dev *pdev,
1373         const unsigned int index, const unsigned int signature)
1374 {
1375         struct isi_board *board = pci_get_drvdata(pdev);
1376         const struct firmware *fw;
1377         unsigned long base = board->base;
1378         unsigned int a;
1379         u16 word_count, status;
1380         int retval = -EIO;
1381         char *name;
1382         u8 *data;
1383
1384         struct stframe {
1385                 u16     addr;
1386                 u16     count;
1387                 u8      data[0];
1388         } *frame;
1389
1390         switch (signature) {
1391         case 0xa5:
1392                 name = "isi608.bin";
1393                 break;
1394         case 0xbb:
1395                 name = "isi608em.bin";
1396                 break;
1397         case 0xcc:
1398                 name = "isi616em.bin";
1399                 break;
1400         case 0xdd:
1401                 name = "isi4608.bin";
1402                 break;
1403         case 0xee:
1404                 name = "isi4616.bin";
1405                 break;
1406         default:
1407                 dev_err(&pdev->dev, "Unknown signature.\n");
1408                 goto end;
1409         }
1410
1411         retval = request_firmware(&fw, name, &pdev->dev);
1412         if (retval)
1413                 goto end;
1414
1415         retval = -EIO;
1416
1417         for (frame = (struct stframe *)fw->data;
1418                         frame < (struct stframe *)(fw->data + fw->size);
1419                         frame = (struct stframe *)((u8 *)(frame + 1) +
1420                                 frame->count)) {
1421                 if (WaitTillCardIsFree(base))
1422                         goto errrelfw;
1423
1424                 outw(0xf0, base);       /* start upload sequence */
1425                 outw(0x00, base);
1426                 outw(frame->addr, base); /* lsb of address */
1427
1428                 word_count = frame->count / 2 + frame->count % 2;
1429                 outw(word_count, base);
1430                 InterruptTheCard(base);
1431
1432                 udelay(100); /* 0x2f */
1433
1434                 if (WaitTillCardIsFree(base))
1435                         goto errrelfw;
1436
1437                 status = inw(base + 0x4);
1438                 if (status != 0) {
1439                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1440                                  "Address:0x%x\n"
1441                                  "Count:0x%x\n"
1442                                  "Status:0x%x\n",
1443                                  index + 1, frame->addr, frame->count, status);
1444                         goto errrelfw;
1445                 }
1446                 outsw(base, frame->data, word_count);
1447
1448                 InterruptTheCard(base);
1449
1450                 udelay(50); /* 0x0f */
1451
1452                 if (WaitTillCardIsFree(base))
1453                         goto errrelfw;
1454
1455                 status = inw(base + 0x4);
1456                 if (status != 0) {
1457                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1458                                 "Status:0x%x\n", index + 1, status);
1459                         goto errrelfw;
1460                 }
1461         }
1462
1463 /* XXX: should we test it by reading it back and comparing with original like
1464  * in load firmware package? */
1465         for (frame = (struct stframe *)fw->data;
1466                         frame < (struct stframe *)(fw->data + fw->size);
1467                         frame = (struct stframe *)((u8 *)(frame + 1) +
1468                                 frame->count)) {
1469                 if (WaitTillCardIsFree(base))
1470                         goto errrelfw;
1471
1472                 outw(0xf1, base); /* start download sequence */
1473                 outw(0x00, base);
1474                 outw(frame->addr, base); /* lsb of address */
1475
1476                 word_count = (frame->count >> 1) + frame->count % 2;
1477                 outw(word_count + 1, base);
1478                 InterruptTheCard(base);
1479
1480                 udelay(50); /* 0xf */
1481
1482                 if (WaitTillCardIsFree(base))
1483                         goto errrelfw;
1484
1485                 status = inw(base + 0x4);
1486                 if (status != 0) {
1487                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1488                                  "Address:0x%x\n"
1489                                  "Count:0x%x\n"
1490                                  "Status: 0x%x\n",
1491                                  index + 1, frame->addr, frame->count, status);
1492                         goto errrelfw;
1493                 }
1494
1495                 data = kmalloc(word_count * 2, GFP_KERNEL);
1496                 if (data == NULL) {
1497                         dev_err(&pdev->dev, "Card%d, firmware upload "
1498                                 "failed, not enough memory\n", index + 1);
1499                         goto errrelfw;
1500                 }
1501                 inw(base);
1502                 insw(base, data, word_count);
1503                 InterruptTheCard(base);
1504
1505                 for (a = 0; a < frame->count; a++)
1506                         if (data[a] != frame->data[a]) {
1507                                 kfree(data);
1508                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1509                                         "failed\n", index + 1);
1510                                 goto errrelfw;
1511                         }
1512                 kfree(data);
1513
1514                 udelay(50); /* 0xf */
1515
1516                 if (WaitTillCardIsFree(base))
1517                         goto errrelfw;
1518
1519                 status = inw(base + 0x4);
1520                 if (status != 0) {
1521                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1522                                 "Card Status:0x%x\n", index + 1, status);
1523                         goto errrelfw;
1524                 }
1525         }
1526
1527         /* xfer ctrl */
1528         if (WaitTillCardIsFree(base))
1529                 goto errrelfw;
1530
1531         outw(0xf2, base);
1532         outw(0x800, base);
1533         outw(0x0, base);
1534         outw(0x0, base);
1535         InterruptTheCard(base);
1536         outw(0x0, base + 0x4); /* for ISI4608 cards */
1537
1538         board->status |= FIRMWARE_LOADED;
1539         retval = 0;
1540
1541 errrelfw:
1542         release_firmware(fw);
1543 end:
1544         return retval;
1545 }
1546
1547 /*
1548  *      Insmod can set static symbols so keep these static
1549  */
1550 static unsigned int card_count;
1551
1552 static int __devinit isicom_probe(struct pci_dev *pdev,
1553         const struct pci_device_id *ent)
1554 {
1555         unsigned int uninitialized_var(signature), index;
1556         int retval = -EPERM;
1557         struct isi_board *board = NULL;
1558
1559         if (card_count >= BOARD_COUNT)
1560                 goto err;
1561
1562         retval = pci_enable_device(pdev);
1563         if (retval) {
1564                 dev_err(&pdev->dev, "failed to enable\n");
1565                 goto err;
1566         }
1567
1568         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1569
1570         /* allot the first empty slot in the array */
1571         for (index = 0; index < BOARD_COUNT; index++)
1572                 if (isi_card[index].base == 0) {
1573                         board = &isi_card[index];
1574                         break;
1575                 }
1576
1577         board->index = index;
1578         board->base = pci_resource_start(pdev, 3);
1579         board->irq = pdev->irq;
1580         card_count++;
1581
1582         pci_set_drvdata(pdev, board);
1583
1584         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1585         if (retval) {
1586                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1587                         "will be disabled.\n", board->base, board->base + 15,
1588                         index + 1);
1589                 retval = -EBUSY;
1590                 goto errdec;
1591         }
1592
1593         retval = request_irq(board->irq, isicom_interrupt,
1594                         IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1595         if (retval < 0) {
1596                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1597                         "Card%d will be disabled.\n", board->irq, index + 1);
1598                 goto errunrr;
1599         }
1600
1601         retval = reset_card(pdev, index, &signature);
1602         if (retval < 0)
1603                 goto errunri;
1604
1605         retval = load_firmware(pdev, index, signature);
1606         if (retval < 0)
1607                 goto errunri;
1608
1609         for (index = 0; index < board->port_count; index++)
1610                 tty_register_device(isicom_normal, board->index * 16 + index,
1611                                 &pdev->dev);
1612
1613         return 0;
1614
1615 errunri:
1616         free_irq(board->irq, board);
1617 errunrr:
1618         pci_release_region(pdev, 3);
1619 errdec:
1620         board->base = 0;
1621         card_count--;
1622         pci_disable_device(pdev);
1623 err:
1624         return retval;
1625 }
1626
1627 static void __devexit isicom_remove(struct pci_dev *pdev)
1628 {
1629         struct isi_board *board = pci_get_drvdata(pdev);
1630         unsigned int i;
1631
1632         for (i = 0; i < board->port_count; i++)
1633                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1634
1635         free_irq(board->irq, board);
1636         pci_release_region(pdev, 3);
1637         board->base = 0;
1638         card_count--;
1639         pci_disable_device(pdev);
1640 }
1641
1642 static int __init isicom_init(void)
1643 {
1644         int retval, idx, channel;
1645         struct isi_port *port;
1646
1647         for (idx = 0; idx < BOARD_COUNT; idx++) {
1648                 port = &isi_ports[idx * 16];
1649                 isi_card[idx].ports = port;
1650                 spin_lock_init(&isi_card[idx].card_lock);
1651                 for (channel = 0; channel < 16; channel++, port++) {
1652                         tty_port_init(&port->port);
1653                         port->port.ops = &isicom_port_ops;
1654                         port->magic = ISICOM_MAGIC;
1655                         port->card = &isi_card[idx];
1656                         port->channel = channel;
1657                         port->port.close_delay = 50 * HZ/100;
1658                         port->port.closing_wait = 3000 * HZ/100;
1659                         port->status = 0;
1660                         /*  . . .  */
1661                 }
1662                 isi_card[idx].base = 0;
1663                 isi_card[idx].irq = 0;
1664         }
1665
1666         /* tty driver structure initialization */
1667         isicom_normal = alloc_tty_driver(PORT_COUNT);
1668         if (!isicom_normal) {
1669                 retval = -ENOMEM;
1670                 goto error;
1671         }
1672
1673         isicom_normal->owner                    = THIS_MODULE;
1674         isicom_normal->name                     = "ttyM";
1675         isicom_normal->major                    = ISICOM_NMAJOR;
1676         isicom_normal->minor_start              = 0;
1677         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1678         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1679         isicom_normal->init_termios             = tty_std_termios;
1680         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1681                 CLOCAL;
1682         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1683                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1684         tty_set_operations(isicom_normal, &isicom_ops);
1685
1686         retval = tty_register_driver(isicom_normal);
1687         if (retval) {
1688                 pr_debug("Couldn't register the dialin driver\n");
1689                 goto err_puttty;
1690         }
1691
1692         retval = pci_register_driver(&isicom_driver);
1693         if (retval < 0) {
1694                 pr_err("Unable to register pci driver.\n");
1695                 goto err_unrtty;
1696         }
1697
1698         mod_timer(&tx, jiffies + 1);
1699
1700         return 0;
1701 err_unrtty:
1702         tty_unregister_driver(isicom_normal);
1703 err_puttty:
1704         put_tty_driver(isicom_normal);
1705 error:
1706         return retval;
1707 }
1708
1709 static void __exit isicom_exit(void)
1710 {
1711         del_timer_sync(&tx);
1712
1713         pci_unregister_driver(&isicom_driver);
1714         tty_unregister_driver(isicom_normal);
1715         put_tty_driver(isicom_normal);
1716 }
1717
1718 module_init(isicom_init);
1719 module_exit(isicom_exit);
1720
1721 MODULE_AUTHOR("MultiTech");
1722 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1723 MODULE_LICENSE("GPL");
1724 MODULE_FIRMWARE("isi608.bin");
1725 MODULE_FIRMWARE("isi608em.bin");
1726 MODULE_FIRMWARE("isi616em.bin");
1727 MODULE_FIRMWARE("isi4608.bin");
1728 MODULE_FIRMWARE("isi4616.bin");