drivers/tty/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.d/)
 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/mm.h>
 128 #include <linux/interrupt.h>
 129 #include <linux/timer.h>
 130 #include <linux/delay.h>
 131 #include <linux/ioport.h>
 132 #include <linux/slab.h>
 133
 134 #include <linux/uaccess.h>
 135 #include <linux/io.h>
 136
 137 #include <linux/pci.h>
 138
 139 #include <linux/isicom.h>
 140
 141 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 142 #define ClearInterrupt(base) inw((base) + 0x0a)
 143
 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 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         = 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         pr_warning("Failed to lock Card (0x%lx)\n", card->base);
 253
 254         return 0;       /* Failed to acquire the card! */
 255 }
 256
 257 static void unlock_card(struct isi_board *card)
 258 {
 259         spin_unlock_irqrestore(&card->card_lock, card->flags);
 260 }
 261
 262 /*
 263  *  ISI Card specific ops ...
 264  */
 265
 266 /* card->lock HAS to be held */
 267 static void raise_dtr(struct isi_port *port)
 268 {
 269         struct isi_board *card = port->card;
 270         unsigned long base = card->base;
 271         u16 channel = port->channel;
 272
 273         if (WaitTillCardIsFree(base))
 274                 return;
 275
 276         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 277         outw(0x0504, base);
 278         InterruptTheCard(base);
 279         port->status |= ISI_DTR;
 280 }
 281
 282 /* card->lock HAS to be held */
 283 static inline void drop_dtr(struct isi_port *port)
 284 {
 285         struct isi_board *card = port->card;
 286         unsigned long base = card->base;
 287         u16 channel = port->channel;
 288
 289         if (WaitTillCardIsFree(base))
 290                 return;
 291
 292         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 293         outw(0x0404, base);
 294         InterruptTheCard(base);
 295         port->status &= ~ISI_DTR;
 296 }
 297
 298 /* card->lock HAS to be held */
 299 static inline void raise_rts(struct isi_port *port)
 300 {
 301         struct isi_board *card = port->card;
 302         unsigned long base = card->base;
 303         u16 channel = port->channel;
 304
 305         if (WaitTillCardIsFree(base))
 306                 return;
 307
 308         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 309         outw(0x0a04, base);
 310         InterruptTheCard(base);
 311         port->status |= ISI_RTS;
 312 }
 313
 314 /* card->lock HAS to be held */
 315 static inline void drop_rts(struct isi_port *port)
 316 {
 317         struct isi_board *card = port->card;
 318         unsigned long base = card->base;
 319         u16 channel = port->channel;
 320
 321         if (WaitTillCardIsFree(base))
 322                 return;
 323
 324         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 325         outw(0x0804, base);
 326         InterruptTheCard(base);
 327         port->status &= ~ISI_RTS;
 328 }
 329
 330 /* card->lock MUST NOT be held */
 331
 332 static void isicom_dtr_rts(struct tty_port *port, int on)
 333 {
 334         struct isi_port *ip = container_of(port, struct isi_port, port);
 335         struct isi_board *card = ip->card;
 336         unsigned long base = card->base;
 337         u16 channel = ip->channel;
 338
 339         if (!lock_card(card))
 340                 return;
 341
 342         if (on) {
 343                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 344                 outw(0x0f04, base);
 345                 InterruptTheCard(base);
 346                 ip->status |= (ISI_DTR | ISI_RTS);
 347         } else {
 348                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 349                 outw(0x0C04, base);
 350                 InterruptTheCard(base);
 351                 ip->status &= ~(ISI_DTR | ISI_RTS);
 352         }
 353         unlock_card(card);
 354 }
 355
 356 /* card->lock HAS to be held */
 357 static void drop_dtr_rts(struct isi_port *port)
 358 {
 359         struct isi_board *card = port->card;
 360         unsigned long base = card->base;
 361         u16 channel = port->channel;
 362
 363         if (WaitTillCardIsFree(base))
 364                 return;
 365
 366         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 367         outw(0x0c04, base);
 368         InterruptTheCard(base);
 369         port->status &= ~(ISI_RTS | ISI_DTR);
 370 }
 371
 372 /*
 373  *      ISICOM Driver specific routines ...
 374  *
 375  */
 376
 377 static inline int __isicom_paranoia_check(struct isi_port const *port,
 378         char *name, const char *routine)
 379 {
 380         if (!port) {
 381                 pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
 382                            name, routine);
 383                 return 1;
 384         }
 385         if (port->magic != ISICOM_MAGIC) {
 386                 pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
 387                            name, routine);
 388                 return 1;
 389         }
 390
 391         return 0;
 392 }
 393
 394 /*
 395  *      Transmitter.
 396  *
 397  *      We shovel data into the card buffers on a regular basis. The card
 398  *      will do the rest of the work for us.
 399  */
 400
 401 static void isicom_tx(unsigned long _data)
 402 {
 403         unsigned long flags, base;
 404         unsigned int retries;
 405         short count = (BOARD_COUNT-1), card;
 406         short txcount, wrd, residue, word_count, cnt;
 407         struct isi_port *port;
 408         struct tty_struct *tty;
 409
 410         /*      find next active board  */
 411         card = (prev_card + 1) & 0x0003;
 412         while (count-- > 0) {
 413                 if (isi_card[card].status & BOARD_ACTIVE)
 414                         break;
 415                 card = (card + 1) & 0x0003;
 416         }
 417         if (!(isi_card[card].status & BOARD_ACTIVE))
 418                 goto sched_again;
 419
 420         prev_card = card;
 421
 422         count = isi_card[card].port_count;
 423         port = isi_card[card].ports;
 424         base = isi_card[card].base;
 425
 426         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 427         for (retries = 0; retries < 100; retries++) {
 428                 if (inw(base + 0xe) & 0x1)
 429                         break;
 430                 udelay(2);
 431         }
 432         if (retries >= 100)
 433                 goto unlock;
 434
 435         tty = tty_port_tty_get(&port->port);
 436         if (tty == NULL)
 437                 goto put_unlock;
 438
 439         for (; count > 0; count--, port++) {
 440                 /* port not active or tx disabled to force flow control */
 441                 if (!(port->port.flags & ASYNC_INITIALIZED) ||
 442                                 !(port->status & ISI_TXOK))
 443                         continue;
 444
 445                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 446                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 447                         continue;
 448
 449                 if (!(inw(base + 0x02) & (1 << port->channel)))
 450                         continue;
 451
 452                 pr_debug("txing %d bytes, port%d.\n",
 453                          txcount, port->channel + 1);
 454                 outw((port->channel << isi_card[card].shift_count) | txcount,
 455                         base);
 456                 residue = NO;
 457                 wrd = 0;
 458                 while (1) {
 459                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 460                                         - port->xmit_tail));
 461                         if (residue == YES) {
 462                                 residue = NO;
 463                                 if (cnt > 0) {
 464                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 465                                                                         << 8);
 466                                         port->xmit_tail = (port->xmit_tail + 1)
 467                                                 & (SERIAL_XMIT_SIZE - 1);
 468                                         port->xmit_cnt--;
 469                                         txcount--;
 470                                         cnt--;
 471                                         outw(wrd, base);
 472                                 } else {
 473                                         outw(wrd, base);
 474                                         break;
 475                                 }
 476                         }
 477                         if (cnt <= 0)
 478                                 break;
 479                         word_count = cnt >> 1;
 480                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 481                         port->xmit_tail = (port->xmit_tail
 482                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 483                         txcount -= (word_count << 1);
 484                         port->xmit_cnt -= (word_count << 1);
 485                         if (cnt & 0x0001) {
 486                                 residue = YES;
 487                                 wrd = port->port.xmit_buf[port->xmit_tail];
 488                                 port->xmit_tail = (port->xmit_tail + 1)
 489                                         & (SERIAL_XMIT_SIZE - 1);
 490                                 port->xmit_cnt--;
 491                                 txcount--;
 492                         }
 493                 }
 494
 495                 InterruptTheCard(base);
 496                 if (port->xmit_cnt <= 0)
 497                         port->status &= ~ISI_TXOK;
 498                 if (port->xmit_cnt <= WAKEUP_CHARS)
 499                         tty_wakeup(tty);
 500         }
 501
 502 put_unlock:
 503         tty_kref_put(tty);
 504 unlock:
 505         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 506         /*      schedule another tx for hopefully in about 10ms */
 507 sched_again:
 508         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 509 }
 510
 511 /*
 512  *      Main interrupt handler routine
 513  */
 514
 515 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 516 {
 517         struct isi_board *card = dev_id;
 518         struct isi_port *port;
 519         struct tty_struct *tty;
 520         unsigned long base;
 521         u16 header, word_count, count, channel;
 522         short byte_count;
 523         unsigned char *rp;
 524
 525         if (!card || !(card->status & FIRMWARE_LOADED))
 526                 return IRQ_NONE;
 527
 528         base = card->base;
 529
 530         /* did the card interrupt us? */
 531         if (!(inw(base + 0x0e) & 0x02))
 532                 return IRQ_NONE;
 533
 534         spin_lock(&card->card_lock);
 535
 536         /*
 537          * disable any interrupts from the PCI card and lower the
 538          * interrupt line
 539          */
 540         outw(0x8000, base+0x04);
 541         ClearInterrupt(base);
 542
 543         inw(base);              /* get the dummy word out */
 544         header = inw(base);
 545         channel = (header & 0x7800) >> card->shift_count;
 546         byte_count = header & 0xff;
 547
 548         if (channel + 1 > card->port_count) {
 549                 pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
 550                            __func__, base, channel+1);
 551                 outw(0x0000, base+0x04); /* enable interrupts */
 552                 spin_unlock(&card->card_lock);
 553                 return IRQ_HANDLED;
 554         }
 555         port = card->ports + channel;
 556         if (!(port->port.flags & ASYNC_INITIALIZED)) {
 557                 outw(0x0000, base+0x04); /* enable interrupts */
 558                 spin_unlock(&card->card_lock);
 559                 return IRQ_HANDLED;
 560         }
 561
 562         tty = tty_port_tty_get(&port->port);
 563         if (tty == NULL) {
 564                 word_count = byte_count >> 1;
 565                 while (byte_count > 1) {
 566                         inw(base);
 567                         byte_count -= 2;
 568                 }
 569                 if (byte_count & 0x01)
 570                         inw(base);
 571                 outw(0x0000, base+0x04); /* enable interrupts */
 572                 spin_unlock(&card->card_lock);
 573                 return IRQ_HANDLED;
 574         }
 575
 576         if (header & 0x8000) {          /* Status Packet */
 577                 header = inw(base);
 578                 switch (header & 0xff) {
 579                 case 0: /* Change in EIA signals */
 580                         if (port->port.flags & ASYNC_CHECK_CD) {
 581                                 if (port->status & ISI_DCD) {
 582                                         if (!(header & ISI_DCD)) {
 583                                         /* Carrier has been lost  */
 584                                                 pr_debug("%s: DCD->low.\n",
 585                                                          __func__);
 586                                                 port->status &= ~ISI_DCD;
 587                                                 tty_hangup(tty);
 588                                         }
 589                                 } else if (header & ISI_DCD) {
 590                                 /* Carrier has been detected */
 591                                         pr_debug("%s: DCD->high.\n",
 592                                                 __func__);
 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 (tty_port_cts_enabled(&port->port)) {
 604                                 if (tty->hw_stopped) {
 605                                         if (header & ISI_CTS) {
 606                                                 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(&port->port, 0, TTY_BREAK);
 638                         if (port->port.flags & ASYNC_SAK)
 639                                 do_SAK(tty);
 640                         tty_flip_buffer_push(&port->port);
 641                         break;
 642
 643                 case 2: /* Statistics            */
 644                         pr_debug("%s: stats!!!\n", __func__);
 645                         break;
 646
 647                 default:
 648                         pr_debug("%s: Unknown code in status packet.\n",
 649                                  __func__);
 650                         break;
 651                 }
 652         } else {                                /* Data   Packet */
 653                 count = tty_prepare_flip_string(&port->port, &rp,
 654                                 byte_count & ~1);
 655                 pr_debug("%s: Can rx %d of %d bytes.\n",
 656                          __func__, count, byte_count);
 657                 word_count = count >> 1;
 658                 insw(base, rp, word_count);
 659                 byte_count -= (word_count << 1);
 660                 if (count & 0x0001) {
 661                         tty_insert_flip_char(&port->port, inw(base) & 0xff,
 662                                 TTY_NORMAL);
 663                         byte_count -= 2;
 664                 }
 665                 if (byte_count > 0) {
 666                         pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
 667                                  __func__, base, channel + 1);
 668                 /* drain out unread xtra data */
 669                 while (byte_count > 0) {
 670                                 inw(base);
 671                                 byte_count -= 2;
 672                         }
 673                 }
 674                 tty_flip_buffer_push(&port->port);
 675         }
 676         outw(0x0000, base+0x04); /* enable interrupts */
 677         spin_unlock(&card->card_lock);
 678         tty_kref_put(tty);
 679
 680         return IRQ_HANDLED;
 681 }
 682
 683 static void isicom_config_port(struct tty_struct *tty)
 684 {
 685         struct isi_port *port = tty->driver_data;
 686         struct isi_board *card = port->card;
 687         unsigned long baud;
 688         unsigned long base = card->base;
 689         u16 channel_setup, channel = port->channel,
 690                 shift_count = card->shift_count;
 691         unsigned char flow_ctrl;
 692
 693         /* FIXME: Switch to new tty baud API */
 694         baud = C_BAUD(tty);
 695         if (baud & CBAUDEX) {
 696                 baud &= ~CBAUDEX;
 697
 698                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 699                  *  then the card is programmed for 57.6Kbps or 115Kbps
 700                  *  respectively.
 701                  */
 702
 703                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 704                 if (baud < 1 || baud > 4)
 705                         tty->termios.c_cflag &= ~CBAUDEX;
 706                 else
 707                         baud += 15;
 708         }
 709         if (baud == 15) {
 710
 711                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 712                  *  by the set_serial_info ioctl ... this is done by
 713                  *  the 'setserial' utility.
 714                  */
 715
 716                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 717                         baud++; /*  57.6 Kbps */
 718                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 719                         baud += 2; /*  115  Kbps */
 720                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 721                         baud += 3; /* 230 kbps*/
 722                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 723                         baud += 4; /* 460 kbps*/
 724         }
 725         if (linuxb_to_isib[baud] == -1) {
 726                 /* hang up */
 727                 drop_dtr(port);
 728                 return;
 729         } else
 730                 raise_dtr(port);
 731
 732         if (WaitTillCardIsFree(base) == 0) {
 733                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 734                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 735                 channel_setup = 0;
 736                 switch (C_CSIZE(tty)) {
 737                 case CS5:
 738                         channel_setup |= ISICOM_CS5;
 739                         break;
 740                 case CS6:
 741                         channel_setup |= ISICOM_CS6;
 742                         break;
 743                 case CS7:
 744                         channel_setup |= ISICOM_CS7;
 745                         break;
 746                 case CS8:
 747                         channel_setup |= ISICOM_CS8;
 748                         break;
 749                 }
 750
 751                 if (C_CSTOPB(tty))
 752                         channel_setup |= ISICOM_2SB;
 753                 if (C_PARENB(tty)) {
 754                         channel_setup |= ISICOM_EVPAR;
 755                         if (C_PARODD(tty))
 756                                 channel_setup |= ISICOM_ODPAR;
 757                 }
 758                 outw(channel_setup, base);
 759                 InterruptTheCard(base);
 760         }
 761         if (C_CLOCAL(tty))
 762                 port->port.flags &= ~ASYNC_CHECK_CD;
 763         else
 764                 port->port.flags |= ASYNC_CHECK_CD;
 765
 766         /* flow control settings ...*/
 767         flow_ctrl = 0;
 768         port->port.flags &= ~ASYNC_CTS_FLOW;
 769         if (C_CRTSCTS(tty)) {
 770                 port->port.flags |= ASYNC_CTS_FLOW;
 771                 flow_ctrl |= ISICOM_CTSRTS;
 772         }
 773         if (I_IXON(tty))
 774                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 775         if (I_IXOFF(tty))
 776                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 777
 778         if (WaitTillCardIsFree(base) == 0) {
 779                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 780                 outw(flow_ctrl << 8 | 0x05, base);
 781                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 782                 InterruptTheCard(base);
 783         }
 784
 785         /*      rx enabled -> enable port for rx on the card    */
 786         if (C_CREAD(tty)) {
 787                 card->port_status |= (1 << channel);
 788                 outw(card->port_status, base + 0x02);
 789         }
 790 }
 791
 792 /* open et all */
 793
 794 static inline void isicom_setup_board(struct isi_board *bp)
 795 {
 796         int channel;
 797         struct isi_port *port;
 798
 799         bp->count++;
 800         if (!(bp->status & BOARD_INIT)) {
 801                 port = bp->ports;
 802                 for (channel = 0; channel < bp->port_count; channel++, port++)
 803                         drop_dtr_rts(port);
 804         }
 805         bp->status |= BOARD_ACTIVE | BOARD_INIT;
 806 }
 807
 808 /* Activate and thus setup board are protected from races against shutdown
 809    by the tty_port mutex */
 810
 811 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 812 {
 813         struct isi_port *port = container_of(tport, struct isi_port, port);
 814         struct isi_board *card = port->card;
 815         unsigned long flags;
 816
 817         if (tty_port_alloc_xmit_buf(tport) < 0)
 818                 return -ENOMEM;
 819
 820         spin_lock_irqsave(&card->card_lock, flags);
 821         isicom_setup_board(card);
 822
 823         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 824
 825         /*      discard any residual data       */
 826         if (WaitTillCardIsFree(card->base) == 0) {
 827                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 828                                 card->base);
 829                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 830                 InterruptTheCard(card->base);
 831         }
 832         isicom_config_port(tty);
 833         spin_unlock_irqrestore(&card->card_lock, flags);
 834
 835         return 0;
 836 }
 837
 838 static int isicom_carrier_raised(struct tty_port *port)
 839 {
 840         struct isi_port *ip = container_of(port, struct isi_port, port);
 841         return (ip->status & ISI_DCD)?1 : 0;
 842 }
 843
 844 static struct tty_port *isicom_find_port(struct tty_struct *tty)
 845 {
 846         struct isi_port *port;
 847         struct isi_board *card;
 848         unsigned int board;
 849         int line = tty->index;
 850
 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 tty_port *tport;
 872
 873         tport = isicom_find_port(tty);
 874         if (tport == NULL)
 875                 return -ENODEV;
 876         port = container_of(tport, struct isi_port, port);
 877
 878         tty->driver_data = port;
 879         return tty_port_open(tport, tty, filp);
 880 }
 881
 882 /* close et all */
 883
 884 /* card->lock HAS to be held */
 885 static void isicom_shutdown_port(struct isi_port *port)
 886 {
 887         struct isi_board *card = port->card;
 888
 889         if (--card->count < 0) {
 890                 pr_debug("%s: bad board(0x%lx) count %d.\n",
 891                          __func__, card->base, card->count);
 892                 card->count = 0;
 893         }
 894         /* last port was closed, shutdown that board too */
 895         if (!card->count)
 896                 card->status &= BOARD_ACTIVE;
 897 }
 898
 899 static void isicom_flush_buffer(struct tty_struct *tty)
 900 {
 901         struct isi_port *port = tty->driver_data;
 902         struct isi_board *card = port->card;
 903         unsigned long flags;
 904
 905         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 906                 return;
 907
 908         spin_lock_irqsave(&card->card_lock, flags);
 909         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 910         spin_unlock_irqrestore(&card->card_lock, flags);
 911
 912         tty_wakeup(tty);
 913 }
 914
 915 static void isicom_shutdown(struct tty_port *port)
 916 {
 917         struct isi_port *ip = container_of(port, struct isi_port, port);
 918         struct isi_board *card = ip->card;
 919         unsigned long flags;
 920
 921         /* indicate to the card that no more data can be received
 922            on this port */
 923         spin_lock_irqsave(&card->card_lock, flags);
 924         card->port_status &= ~(1 << ip->channel);
 925         outw(card->port_status, card->base + 0x02);
 926         isicom_shutdown_port(ip);
 927         spin_unlock_irqrestore(&card->card_lock, flags);
 928         tty_port_free_xmit_buf(port);
 929 }
 930
 931 static void isicom_close(struct tty_struct *tty, struct file *filp)
 932 {
 933         struct isi_port *ip = tty->driver_data;
 934         struct tty_port *port;
 935
 936         if (ip == NULL)
 937                 return;
 938
 939         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)
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,
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         mutex_lock(&port->port.mutex);
1117         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1118                 (newinfo.flags & ASYNC_SPD_MASK));
1119
1120         if (!capable(CAP_SYS_ADMIN)) {
1121                 if ((newinfo.close_delay != port->port.close_delay) ||
1122                                 (newinfo.closing_wait != port->port.closing_wait) ||
1123                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1124                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1125                         mutex_unlock(&port->port.mutex);
1126                         return -EPERM;
1127                 }
1128                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1129                                 (newinfo.flags & ASYNC_USR_MASK));
1130         } else {
1131                 port->port.close_delay = newinfo.close_delay;
1132                 port->port.closing_wait = newinfo.closing_wait;
1133                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1134                                 (newinfo.flags & ASYNC_FLAGS));
1135         }
1136         if (reconfig_port) {
1137                 unsigned long flags;
1138                 spin_lock_irqsave(&port->card->card_lock, flags);
1139                 isicom_config_port(tty);
1140                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1141         }
1142         mutex_unlock(&port->port.mutex);
1143         return 0;
1144 }
1145
1146 static int isicom_get_serial_info(struct isi_port *port,
1147         struct serial_struct __user *info)
1148 {
1149         struct serial_struct out_info;
1150
1151         mutex_lock(&port->port.mutex);
1152         memset(&out_info, 0, sizeof(out_info));
1153 /*      out_info.type = ? */
1154         out_info.line = port - isi_ports;
1155         out_info.port = port->card->base;
1156         out_info.irq = port->card->irq;
1157         out_info.flags = port->port.flags;
1158 /*      out_info.baud_base = ? */
1159         out_info.close_delay = port->port.close_delay;
1160         out_info.closing_wait = port->port.closing_wait;
1161         mutex_unlock(&port->port.mutex);
1162         if (copy_to_user(info, &out_info, sizeof(out_info)))
1163                 return -EFAULT;
1164         return 0;
1165 }
1166
1167 static int isicom_ioctl(struct tty_struct *tty,
1168         unsigned int cmd, unsigned long arg)
1169 {
1170         struct isi_port *port = tty->driver_data;
1171         void __user *argp = (void __user *)arg;
1172
1173         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1174                 return -ENODEV;
1175
1176         switch (cmd) {
1177         case TIOCGSERIAL:
1178                 return isicom_get_serial_info(port, argp);
1179
1180         case TIOCSSERIAL:
1181                 return isicom_set_serial_info(tty, argp);
1182
1183         default:
1184                 return -ENOIOCTLCMD;
1185         }
1186         return 0;
1187 }
1188
1189 /* set_termios et all */
1190 static void isicom_set_termios(struct tty_struct *tty,
1191         struct ktermios *old_termios)
1192 {
1193         struct isi_port *port = tty->driver_data;
1194         unsigned long flags;
1195
1196         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1197                 return;
1198
1199         if (tty->termios.c_cflag == old_termios->c_cflag &&
1200                         tty->termios.c_iflag == old_termios->c_iflag)
1201                 return;
1202
1203         spin_lock_irqsave(&port->card->card_lock, flags);
1204         isicom_config_port(tty);
1205         spin_unlock_irqrestore(&port->card->card_lock, flags);
1206
1207         if ((old_termios->c_cflag & CRTSCTS) &&
1208                         !(tty->termios.c_cflag & CRTSCTS)) {
1209                 tty->hw_stopped = 0;
1210                 isicom_start(tty);
1211         }
1212 }
1213
1214 /* throttle et all */
1215 static void isicom_throttle(struct tty_struct *tty)
1216 {
1217         struct isi_port *port = tty->driver_data;
1218         struct isi_board *card = port->card;
1219
1220         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1221                 return;
1222
1223         /* tell the card that this port cannot handle any more data for now */
1224         card->port_status &= ~(1 << port->channel);
1225         outw(card->port_status, card->base + 0x02);
1226 }
1227
1228 /* unthrottle et all */
1229 static void isicom_unthrottle(struct tty_struct *tty)
1230 {
1231         struct isi_port *port = tty->driver_data;
1232         struct isi_board *card = port->card;
1233
1234         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1235                 return;
1236
1237         /* tell the card that this port is ready to accept more data */
1238         card->port_status |= (1 << port->channel);
1239         outw(card->port_status, card->base + 0x02);
1240 }
1241
1242 /* stop et all */
1243 static void isicom_stop(struct tty_struct *tty)
1244 {
1245         struct isi_port *port = tty->driver_data;
1246
1247         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1248                 return;
1249
1250         /* this tells the transmitter not to consider this port for
1251            data output to the card. */
1252         port->status &= ~ISI_TXOK;
1253 }
1254
1255 /* start et all */
1256 static void isicom_start(struct tty_struct *tty)
1257 {
1258         struct isi_port *port = tty->driver_data;
1259
1260         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1261                 return;
1262
1263         /* this tells the transmitter to consider this port for
1264            data output to the card. */
1265         port->status |= ISI_TXOK;
1266 }
1267
1268 static void isicom_hangup(struct tty_struct *tty)
1269 {
1270         struct isi_port *port = tty->driver_data;
1271
1272         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1273                 return;
1274         tty_port_hangup(&port->port);
1275 }
1276
1277
1278 /*
1279  * Driver init and deinit functions
1280  */
1281
1282 static const struct tty_operations isicom_ops = {
1283         .open                   = isicom_open,
1284         .close                  = isicom_close,
1285         .write                  = isicom_write,
1286         .put_char               = isicom_put_char,
1287         .flush_chars            = isicom_flush_chars,
1288         .write_room             = isicom_write_room,
1289         .chars_in_buffer        = isicom_chars_in_buffer,
1290         .ioctl                  = isicom_ioctl,
1291         .set_termios            = isicom_set_termios,
1292         .throttle               = isicom_throttle,
1293         .unthrottle             = isicom_unthrottle,
1294         .stop                   = isicom_stop,
1295         .start                  = isicom_start,
1296         .hangup                 = isicom_hangup,
1297         .flush_buffer           = isicom_flush_buffer,
1298         .tiocmget               = isicom_tiocmget,
1299         .tiocmset               = isicom_tiocmset,
1300         .break_ctl              = isicom_send_break,
1301 };
1302
1303 static const struct tty_port_operations isicom_port_ops = {
1304         .carrier_raised         = isicom_carrier_raised,
1305         .dtr_rts                = isicom_dtr_rts,
1306         .activate               = isicom_activate,
1307         .shutdown               = isicom_shutdown,
1308 };
1309
1310 static int reset_card(struct pci_dev *pdev,
1311         const unsigned int card, unsigned int *signature)
1312 {
1313         struct isi_board *board = pci_get_drvdata(pdev);
1314         unsigned long base = board->base;
1315         unsigned int sig, portcount = 0;
1316         int retval = 0;
1317
1318         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1319                 base);
1320
1321         inw(base + 0x8);
1322
1323         msleep(10);
1324
1325         outw(0, base + 0x8); /* Reset */
1326
1327         msleep(1000);
1328
1329         sig = inw(base + 0x4) & 0xff;
1330
1331         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1332                         sig != 0xee) {
1333                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1334                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1335                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1336                 retval = -EIO;
1337                 goto end;
1338         }
1339
1340         msleep(10);
1341
1342         portcount = inw(base + 0x2);
1343         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1344                                 portcount != 8 && portcount != 16)) {
1345                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1346                         card + 1);
1347                 retval = -EIO;
1348                 goto end;
1349         }
1350
1351         switch (sig) {
1352         case 0xa5:
1353         case 0xbb:
1354         case 0xdd:
1355                 board->port_count = (portcount == 4) ? 4 : 8;
1356                 board->shift_count = 12;
1357                 break;
1358         case 0xcc:
1359         case 0xee:
1360                 board->port_count = 16;
1361                 board->shift_count = 11;
1362                 break;
1363         }
1364         dev_info(&pdev->dev, "-Done\n");
1365         *signature = sig;
1366
1367 end:
1368         return retval;
1369 }
1370
1371 static int load_firmware(struct pci_dev *pdev,
1372         const unsigned int index, const unsigned int signature)
1373 {
1374         struct isi_board *board = pci_get_drvdata(pdev);
1375         const struct firmware *fw;
1376         unsigned long base = board->base;
1377         unsigned int a;
1378         u16 word_count, status;
1379         int retval = -EIO;
1380         char *name;
1381         u8 *data;
1382
1383         struct stframe {
1384                 u16     addr;
1385                 u16     count;
1386                 u8      data[0];
1387         } *frame;
1388
1389         switch (signature) {
1390         case 0xa5:
1391                 name = "isi608.bin";
1392                 break;
1393         case 0xbb:
1394                 name = "isi608em.bin";
1395                 break;
1396         case 0xcc:
1397                 name = "isi616em.bin";
1398                 break;
1399         case 0xdd:
1400                 name = "isi4608.bin";
1401                 break;
1402         case 0xee:
1403                 name = "isi4616.bin";
1404                 break;
1405         default:
1406                 dev_err(&pdev->dev, "Unknown signature.\n");
1407                 goto end;
1408         }
1409
1410         retval = request_firmware(&fw, name, &pdev->dev);
1411         if (retval)
1412                 goto end;
1413
1414         retval = -EIO;
1415
1416         for (frame = (struct stframe *)fw->data;
1417                         frame < (struct stframe *)(fw->data + fw->size);
1418                         frame = (struct stframe *)((u8 *)(frame + 1) +
1419                                 frame->count)) {
1420                 if (WaitTillCardIsFree(base))
1421                         goto errrelfw;
1422
1423                 outw(0xf0, base);       /* start upload sequence */
1424                 outw(0x00, base);
1425                 outw(frame->addr, base); /* lsb of address */
1426
1427                 word_count = frame->count / 2 + frame->count % 2;
1428                 outw(word_count, base);
1429                 InterruptTheCard(base);
1430
1431                 udelay(100); /* 0x2f */
1432
1433                 if (WaitTillCardIsFree(base))
1434                         goto errrelfw;
1435
1436                 status = inw(base + 0x4);
1437                 if (status != 0) {
1438                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1439                                  "Address:0x%x\n"
1440                                  "Count:0x%x\n"
1441                                  "Status:0x%x\n",
1442                                  index + 1, frame->addr, frame->count, status);
1443                         goto errrelfw;
1444                 }
1445                 outsw(base, frame->data, word_count);
1446
1447                 InterruptTheCard(base);
1448
1449                 udelay(50); /* 0x0f */
1450
1451                 if (WaitTillCardIsFree(base))
1452                         goto errrelfw;
1453
1454                 status = inw(base + 0x4);
1455                 if (status != 0) {
1456                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1457                                 "Status:0x%x\n", index + 1, status);
1458                         goto errrelfw;
1459                 }
1460         }
1461
1462 /* XXX: should we test it by reading it back and comparing with original like
1463  * in load firmware package? */
1464         for (frame = (struct stframe *)fw->data;
1465                         frame < (struct stframe *)(fw->data + fw->size);
1466                         frame = (struct stframe *)((u8 *)(frame + 1) +
1467                                 frame->count)) {
1468                 if (WaitTillCardIsFree(base))
1469                         goto errrelfw;
1470
1471                 outw(0xf1, base); /* start download sequence */
1472                 outw(0x00, base);
1473                 outw(frame->addr, base); /* lsb of address */
1474
1475                 word_count = (frame->count >> 1) + frame->count % 2;
1476                 outw(word_count + 1, base);
1477                 InterruptTheCard(base);
1478
1479                 udelay(50); /* 0xf */
1480
1481                 if (WaitTillCardIsFree(base))
1482                         goto errrelfw;
1483
1484                 status = inw(base + 0x4);
1485                 if (status != 0) {
1486                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1487                                  "Address:0x%x\n"
1488                                  "Count:0x%x\n"
1489                                  "Status: 0x%x\n",
1490                                  index + 1, frame->addr, frame->count, status);
1491                         goto errrelfw;
1492                 }
1493
1494                 data = kmalloc(word_count * 2, GFP_KERNEL);
1495                 if (data == NULL) {
1496                         dev_err(&pdev->dev, "Card%d, firmware upload "
1497                                 "failed, not enough memory\n", index + 1);
1498                         goto errrelfw;
1499                 }
1500                 inw(base);
1501                 insw(base, data, word_count);
1502                 InterruptTheCard(base);
1503
1504                 for (a = 0; a < frame->count; a++)
1505                         if (data[a] != frame->data[a]) {
1506                                 kfree(data);
1507                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1508                                         "failed\n", index + 1);
1509                                 goto errrelfw;
1510                         }
1511                 kfree(data);
1512
1513                 udelay(50); /* 0xf */
1514
1515                 if (WaitTillCardIsFree(base))
1516                         goto errrelfw;
1517
1518                 status = inw(base + 0x4);
1519                 if (status != 0) {
1520                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1521                                 "Card Status:0x%x\n", index + 1, status);
1522                         goto errrelfw;
1523                 }
1524         }
1525
1526         /* xfer ctrl */
1527         if (WaitTillCardIsFree(base))
1528                 goto errrelfw;
1529
1530         outw(0xf2, base);
1531         outw(0x800, base);
1532         outw(0x0, base);
1533         outw(0x0, base);
1534         InterruptTheCard(base);
1535         outw(0x0, base + 0x4); /* for ISI4608 cards */
1536
1537         board->status |= FIRMWARE_LOADED;
1538         retval = 0;
1539
1540 errrelfw:
1541         release_firmware(fw);
1542 end:
1543         return retval;
1544 }
1545
1546 /*
1547  *      Insmod can set static symbols so keep these static
1548  */
1549 static unsigned int card_count;
1550
1551 static int isicom_probe(struct pci_dev *pdev,
1552         const struct pci_device_id *ent)
1553 {
1554         unsigned int uninitialized_var(signature), index;
1555         int retval = -EPERM;
1556         struct isi_board *board = NULL;
1557
1558         if (card_count >= BOARD_COUNT)
1559                 goto err;
1560
1561         retval = pci_enable_device(pdev);
1562         if (retval) {
1563                 dev_err(&pdev->dev, "failed to enable\n");
1564                 goto err;
1565         }
1566
1567         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1568
1569         /* allot the first empty slot in the array */
1570         for (index = 0; index < BOARD_COUNT; index++) {
1571                 if (isi_card[index].base == 0) {
1572                         board = &isi_card[index];
1573                         break;
1574                 }
1575         }
1576         if (index == BOARD_COUNT) {
1577                 retval = -ENODEV;
1578                 goto err_disable;
1579         }
1580
1581         board->index = index;
1582         board->base = pci_resource_start(pdev, 3);
1583         board->irq = pdev->irq;
1584         card_count++;
1585
1586         pci_set_drvdata(pdev, board);
1587
1588         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1589         if (retval) {
1590                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1591                         "will be disabled.\n", board->base, board->base + 15,
1592                         index + 1);
1593                 retval = -EBUSY;
1594                 goto errdec;
1595         }
1596
1597         retval = request_irq(board->irq, isicom_interrupt,
1598                         IRQF_SHARED, ISICOM_NAME, board);
1599         if (retval < 0) {
1600                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1601                         "Card%d will be disabled.\n", board->irq, index + 1);
1602                 goto errunrr;
1603         }
1604
1605         retval = reset_card(pdev, index, &signature);
1606         if (retval < 0)
1607                 goto errunri;
1608
1609         retval = load_firmware(pdev, index, signature);
1610         if (retval < 0)
1611                 goto errunri;
1612
1613         for (index = 0; index < board->port_count; index++) {
1614                 struct tty_port *tport = &board->ports[index].port;
1615                 tty_port_init(tport);
1616                 tport->ops = &isicom_port_ops;
1617                 tport->close_delay = 50 * HZ/100;
1618                 tport->closing_wait = 3000 * HZ/100;
1619                 tty_port_register_device(tport, isicom_normal,
1620                                 board->index * 16 + index, &pdev->dev);
1621         }
1622
1623         return 0;
1624
1625 errunri:
1626         free_irq(board->irq, board);
1627 errunrr:
1628         pci_release_region(pdev, 3);
1629 errdec:
1630         board->base = 0;
1631         card_count--;
1632 err_disable:
1633         pci_disable_device(pdev);
1634 err:
1635         return retval;
1636 }
1637
1638 static void isicom_remove(struct pci_dev *pdev)
1639 {
1640         struct isi_board *board = pci_get_drvdata(pdev);
1641         unsigned int i;
1642
1643         for (i = 0; i < board->port_count; i++) {
1644                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1645                 tty_port_destroy(&board->ports[i].port);
1646         }
1647
1648         free_irq(board->irq, board);
1649         pci_release_region(pdev, 3);
1650         board->base = 0;
1651         card_count--;
1652         pci_disable_device(pdev);
1653 }
1654
1655 static int __init isicom_init(void)
1656 {
1657         int retval, idx, channel;
1658         struct isi_port *port;
1659
1660         for (idx = 0; idx < BOARD_COUNT; idx++) {
1661                 port = &isi_ports[idx * 16];
1662                 isi_card[idx].ports = port;
1663                 spin_lock_init(&isi_card[idx].card_lock);
1664                 for (channel = 0; channel < 16; channel++, port++) {
1665                         port->magic = ISICOM_MAGIC;
1666                         port->card = &isi_card[idx];
1667                         port->channel = channel;
1668                         port->status = 0;
1669                         /*  . . .  */
1670                 }
1671                 isi_card[idx].base = 0;
1672                 isi_card[idx].irq = 0;
1673         }
1674
1675         /* tty driver structure initialization */
1676         isicom_normal = alloc_tty_driver(PORT_COUNT);
1677         if (!isicom_normal) {
1678                 retval = -ENOMEM;
1679                 goto error;
1680         }
1681
1682         isicom_normal->name                     = "ttyM";
1683         isicom_normal->major                    = ISICOM_NMAJOR;
1684         isicom_normal->minor_start              = 0;
1685         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1686         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1687         isicom_normal->init_termios             = tty_std_termios;
1688         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1689                 CLOCAL;
1690         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1691                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1692         tty_set_operations(isicom_normal, &isicom_ops);
1693
1694         retval = tty_register_driver(isicom_normal);
1695         if (retval) {
1696                 pr_debug("Couldn't register the dialin driver\n");
1697                 goto err_puttty;
1698         }
1699
1700         retval = pci_register_driver(&isicom_driver);
1701         if (retval < 0) {
1702                 pr_err("Unable to register pci driver.\n");
1703                 goto err_unrtty;
1704         }
1705
1706         mod_timer(&tx, jiffies + 1);
1707
1708         return 0;
1709 err_unrtty:
1710         tty_unregister_driver(isicom_normal);
1711 err_puttty:
1712         put_tty_driver(isicom_normal);
1713 error:
1714         return retval;
1715 }
1716
1717 static void __exit isicom_exit(void)
1718 {
1719         del_timer_sync(&tx);
1720
1721         pci_unregister_driver(&isicom_driver);
1722         tty_unregister_driver(isicom_normal);
1723         put_tty_driver(isicom_normal);
1724 }
1725
1726 module_init(isicom_init);
1727 module_exit(isicom_exit);
1728
1729 MODULE_AUTHOR("MultiTech");
1730 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1731 MODULE_LICENSE("GPL");
1732 MODULE_FIRMWARE("isi608.bin");
1733 MODULE_FIRMWARE("isi608em.bin");
1734 MODULE_FIRMWARE("isi616em.bin");
1735 MODULE_FIRMWARE("isi4608.bin");
1736 MODULE_FIRMWARE("isi4616.bin");