git.rot13.org Git - linux/blob - drivers/tty/isicom.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *      Original driver code supplied by Multi-Tech
   4  *
   5  *      Changes
   6  *      1/9/98  alan@lxorguk.ukuu.org.uk
   7  *                                      Merge to 2.0.x kernel tree
   8  *                                      Obtain and use official major/minors
   9  *                                      Loader switched to a misc device
  10  *                                      (fixed range check bug as a side effect)
  11  *                                      Printk clean up
  12  *      9/12/98 alan@lxorguk.ukuu.org.uk
  13  *                                      Rough port to 2.1.x
  14  *
  15  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  16  *                                      a new unified driver.
  17  *
  18  *      3/9/99  sameer                  Added support for ISI4616 cards.
  19  *
  20  *      16/9/99 sameer                  We do not force RTS low anymore.
  21  *                                      This is to prevent the firmware
  22  *                                      from getting confused.
  23  *
  24  *      26/10/99 sameer                 Cosmetic changes:The driver now
  25  *                                      dumps the Port Count information
  26  *                                      along with I/O address and IRQ.
  27  *
  28  *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
  29  *
  30  *      10/5/00  sameer                 Fixed isicom_shutdown_board()
  31  *                                      to not lower DTR on all the ports
  32  *                                      when the last port on the card is
  33  *                                      closed.
  34  *
  35  *      10/5/00  sameer                 Signal mask setup command added
  36  *                                      to  isicom_setup_port and
  37  *                                      isicom_shutdown_port.
  38  *
  39  *      24/5/00  sameer                 The driver is now SMP aware.
  40  *
  41  *
  42  *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
  43  *
  44  *
  45  *      03/01/01  anil .s               Added support for resetting the
  46  *                                      internal modems on ISI cards.
  47  *
  48  *      08/02/01  anil .s               Upgraded the driver for kernel
  49  *                                      2.4.x
  50  *
  51  *      11/04/01  Kevin                 Fixed firmware load problem with
  52  *                                      ISIHP-4X card
  53  *
  54  *      30/04/01  anil .s               Fixed the remote login through
  55  *                                      ISI port problem. Now the link
  56  *                                      does not go down before password
  57  *                                      prompt.
  58  *
  59  *      03/05/01  anil .s               Fixed the problem with IRQ sharing
  60  *                                      among ISI-PCI cards.
  61  *
  62  *      03/05/01  anil .s               Added support to display the version
  63  *                                      info during insmod as well as module
  64  *                                      listing by lsmod.
  65  *
  66  *      10/05/01  anil .s               Done the modifications to the source
  67  *                                      file and Install script so that the
  68  *                                      same installation can be used for
  69  *                                      2.2.x and 2.4.x kernel.
  70  *
  71  *      06/06/01  anil .s               Now we drop both dtr and rts during
  72  *                                      shutdown_port as well as raise them
  73  *                                      during isicom_config_port.
  74  *
  75  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  76  *                                      restore_flags on failure in
  77  *                                      isicom_send_break, verify put_user
  78  *                                      result
  79  *
  80  *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
  81  *                                      Baud index extended to 21
  82  *
  83  *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
  84  *                                      Taken care of license warning.
  85  *
  86  *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
  87  *                                      Red Hat Distribution
  88  *
  89  *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
  90  *                                      into a single 2.6 driver
  91  *
  92  *      ***********************************************************
  93  *
  94  *      To use this driver you also need the support package. You
  95  *      can find this in RPM format on
  96  *              ftp://ftp.linux.org.uk/pub/linux/alan
  97  *
  98  *      You can find the original tools for this direct from Multitech
  99  *              ftp://ftp.multitech.com/ISI-Cards/
 100  *
 101  *      Having installed the cards the module options (/etc/modprobe.d/)
 102  *
 103  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
 104  *
 105  *      Omit those entries for boards you don't have installed.
 106  *
 107  *      TODO
 108  *              Merge testing
 109  *              64-bit verification
 110  */
 111
 112 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 113
 114 #include <linux/module.h>
 115 #include <linux/firmware.h>
 116 #include <linux/kernel.h>
 117 #include <linux/tty.h>
 118 #include <linux/tty_flip.h>
 119 #include <linux/termios.h>
 120 #include <linux/fs.h>
 121 #include <linux/sched.h>
 122 #include <linux/serial.h>
 123 #include <linux/mm.h>
 124 #include <linux/interrupt.h>
 125 #include <linux/timer.h>
 126 #include <linux/delay.h>
 127 #include <linux/ioport.h>
 128 #include <linux/slab.h>
 129
 130 #include <linux/uaccess.h>
 131 #include <linux/io.h>
 132
 133 #include <linux/pci.h>
 134
 135 #include <linux/isicom.h>
 136
 137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 138 #define ClearInterrupt(base) inw((base) + 0x0a)
 139
 140 #ifdef DEBUG
 141 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 142 #else
 143 #define isicom_paranoia_check(a, b, c) 0
 144 #endif
 145
 146 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 147 static void isicom_remove(struct pci_dev *);
 148
 149 static const struct pci_device_id isicom_pci_tbl[] = {
 150         { PCI_DEVICE(VENDOR_ID, 0x2028) },
 151         { PCI_DEVICE(VENDOR_ID, 0x2051) },
 152         { PCI_DEVICE(VENDOR_ID, 0x2052) },
 153         { PCI_DEVICE(VENDOR_ID, 0x2053) },
 154         { PCI_DEVICE(VENDOR_ID, 0x2054) },
 155         { PCI_DEVICE(VENDOR_ID, 0x2055) },
 156         { PCI_DEVICE(VENDOR_ID, 0x2056) },
 157         { PCI_DEVICE(VENDOR_ID, 0x2057) },
 158         { PCI_DEVICE(VENDOR_ID, 0x2058) },
 159         { 0 }
 160 };
 161 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 162
 163 static struct pci_driver isicom_driver = {
 164         .name           = "isicom",
 165         .id_table       = isicom_pci_tbl,
 166         .probe          = isicom_probe,
 167         .remove         = isicom_remove
 168 };
 169
 170 static int prev_card = 3;       /*      start servicing isi_card[0]     */
 171 static struct tty_driver *isicom_normal;
 172
 173 static void isicom_tx(struct timer_list *unused);
 174 static void isicom_start(struct tty_struct *tty);
 175
 176 static DEFINE_TIMER(tx, isicom_tx);
 177
 178 /*   baud index mappings from linux defns to isi */
 179
 180 static signed char linuxb_to_isib[] = {
 181         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 182 };
 183
 184 struct  isi_board {
 185         unsigned long           base;
 186         int                     irq;
 187         unsigned char           port_count;
 188         unsigned short          status;
 189         unsigned short          port_status; /* each bit for each port */
 190         unsigned short          shift_count;
 191         struct isi_port         *ports;
 192         signed char             count;
 193         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 194         unsigned long           flags;
 195         unsigned int            index;
 196 };
 197
 198 struct  isi_port {
 199         unsigned short          magic;
 200         struct tty_port         port;
 201         u16                     channel;
 202         u16                     status;
 203         struct isi_board        *card;
 204         unsigned char           *xmit_buf;
 205         int                     xmit_head;
 206         int                     xmit_tail;
 207         int                     xmit_cnt;
 208 };
 209
 210 static struct isi_board isi_card[BOARD_COUNT];
 211 static struct isi_port  isi_ports[PORT_COUNT];
 212
 213 /*
 214  *      Locking functions for card level locking. We need to own both
 215  *      the kernel lock for the card and have the card in a position that
 216  *      it wants to talk.
 217  */
 218
 219 static int WaitTillCardIsFree(unsigned long base)
 220 {
 221         unsigned int count = 0;
 222         unsigned int a = in_atomic(); /* do we run under spinlock? */
 223
 224         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 225                 if (a)
 226                         mdelay(1);
 227                 else
 228                         msleep(1);
 229
 230         return !(inw(base + 0xe) & 0x1);
 231 }
 232
 233 static int lock_card(struct isi_board *card)
 234 {
 235         unsigned long base = card->base;
 236         unsigned int retries, a;
 237
 238         for (retries = 0; retries < 10; retries++) {
 239                 spin_lock_irqsave(&card->card_lock, card->flags);
 240                 for (a = 0; a < 10; a++) {
 241                         if (inw(base + 0xe) & 0x1)
 242                                 return 1;
 243                         udelay(10);
 244                 }
 245                 spin_unlock_irqrestore(&card->card_lock, card->flags);
 246                 msleep(10);
 247         }
 248         pr_warn("Failed to lock Card (0x%lx)\n", card->base);
 249
 250         return 0;       /* Failed to acquire the card! */
 251 }
 252
 253 static void unlock_card(struct isi_board *card)
 254 {
 255         spin_unlock_irqrestore(&card->card_lock, card->flags);
 256 }
 257
 258 /*
 259  *  ISI Card specific ops ...
 260  */
 261
 262 /* card->lock HAS to be held */
 263 static void raise_dtr(struct isi_port *port)
 264 {
 265         struct isi_board *card = port->card;
 266         unsigned long base = card->base;
 267         u16 channel = port->channel;
 268
 269         if (WaitTillCardIsFree(base))
 270                 return;
 271
 272         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 273         outw(0x0504, base);
 274         InterruptTheCard(base);
 275         port->status |= ISI_DTR;
 276 }
 277
 278 /* card->lock HAS to be held */
 279 static void drop_dtr(struct isi_port *port)
 280 {
 281         struct isi_board *card = port->card;
 282         unsigned long base = card->base;
 283         u16 channel = port->channel;
 284
 285         if (WaitTillCardIsFree(base))
 286                 return;
 287
 288         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 289         outw(0x0404, base);
 290         InterruptTheCard(base);
 291         port->status &= ~ISI_DTR;
 292 }
 293
 294 /* card->lock HAS to be held */
 295 static inline void raise_rts(struct isi_port *port)
 296 {
 297         struct isi_board *card = port->card;
 298         unsigned long base = card->base;
 299         u16 channel = port->channel;
 300
 301         if (WaitTillCardIsFree(base))
 302                 return;
 303
 304         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 305         outw(0x0a04, base);
 306         InterruptTheCard(base);
 307         port->status |= ISI_RTS;
 308 }
 309
 310 /* card->lock HAS to be held */
 311 static inline void drop_rts(struct isi_port *port)
 312 {
 313         struct isi_board *card = port->card;
 314         unsigned long base = card->base;
 315         u16 channel = port->channel;
 316
 317         if (WaitTillCardIsFree(base))
 318                 return;
 319
 320         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 321         outw(0x0804, base);
 322         InterruptTheCard(base);
 323         port->status &= ~ISI_RTS;
 324 }
 325
 326 /* card->lock MUST NOT be held */
 327
 328 static void isicom_dtr_rts(struct tty_port *port, int on)
 329 {
 330         struct isi_port *ip = container_of(port, struct isi_port, port);
 331         struct isi_board *card = ip->card;
 332         unsigned long base = card->base;
 333         u16 channel = ip->channel;
 334
 335         if (!lock_card(card))
 336                 return;
 337
 338         if (on) {
 339                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 340                 outw(0x0f04, base);
 341                 InterruptTheCard(base);
 342                 ip->status |= (ISI_DTR | ISI_RTS);
 343         } else {
 344                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 345                 outw(0x0C04, base);
 346                 InterruptTheCard(base);
 347                 ip->status &= ~(ISI_DTR | ISI_RTS);
 348         }
 349         unlock_card(card);
 350 }
 351
 352 /* card->lock HAS to be held */
 353 static void drop_dtr_rts(struct isi_port *port)
 354 {
 355         struct isi_board *card = port->card;
 356         unsigned long base = card->base;
 357         u16 channel = port->channel;
 358
 359         if (WaitTillCardIsFree(base))
 360                 return;
 361
 362         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 363         outw(0x0c04, base);
 364         InterruptTheCard(base);
 365         port->status &= ~(ISI_RTS | ISI_DTR);
 366 }
 367
 368 /*
 369  *      ISICOM Driver specific routines ...
 370  *
 371  */
 372
 373 static inline int __isicom_paranoia_check(struct isi_port const *port,
 374         char *name, const char *routine)
 375 {
 376         if (!port) {
 377                 pr_warn("Warning: bad isicom magic for dev %s in %s\n",
 378                         name, routine);
 379                 return 1;
 380         }
 381         if (port->magic != ISICOM_MAGIC) {
 382                 pr_warn("Warning: NULL isicom port for dev %s in %s\n",
 383                         name, routine);
 384                 return 1;
 385         }
 386
 387         return 0;
 388 }
 389
 390 /*
 391  *      Transmitter.
 392  *
 393  *      We shovel data into the card buffers on a regular basis. The card
 394  *      will do the rest of the work for us.
 395  */
 396
 397 static void isicom_tx(struct timer_list *unused)
 398 {
 399         unsigned long flags, base;
 400         unsigned int retries;
 401         short count = (BOARD_COUNT-1), card;
 402         short txcount, wrd, residue, word_count, cnt;
 403         struct isi_port *port;
 404         struct tty_struct *tty;
 405
 406         /*      find next active board  */
 407         card = (prev_card + 1) & 0x0003;
 408         while (count-- > 0) {
 409                 if (isi_card[card].status & BOARD_ACTIVE)
 410                         break;
 411                 card = (card + 1) & 0x0003;
 412         }
 413         if (!(isi_card[card].status & BOARD_ACTIVE))
 414                 goto sched_again;
 415
 416         prev_card = card;
 417
 418         count = isi_card[card].port_count;
 419         port = isi_card[card].ports;
 420         base = isi_card[card].base;
 421
 422         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 423         for (retries = 0; retries < 100; retries++) {
 424                 if (inw(base + 0xe) & 0x1)
 425                         break;
 426                 udelay(2);
 427         }
 428         if (retries >= 100)
 429                 goto unlock;
 430
 431         tty = tty_port_tty_get(&port->port);
 432         if (tty == NULL)
 433                 goto put_unlock;
 434
 435         for (; count > 0; count--, port++) {
 436                 /* port not active or tx disabled to force flow control */
 437                 if (!tty_port_initialized(&port->port) ||
 438                         !(port->status & ISI_TXOK))
 439                         continue;
 440
 441                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 442                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 443                         continue;
 444
 445                 if (!(inw(base + 0x02) & (1 << port->channel)))
 446                         continue;
 447
 448                 pr_debug("txing %d bytes, port%d.\n",
 449                          txcount, port->channel + 1);
 450                 outw((port->channel << isi_card[card].shift_count) | txcount,
 451                         base);
 452                 residue = NO;
 453                 wrd = 0;
 454                 while (1) {
 455                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 456                                         - port->xmit_tail));
 457                         if (residue == YES) {
 458                                 residue = NO;
 459                                 if (cnt > 0) {
 460                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 461                                                                         << 8);
 462                                         port->xmit_tail = (port->xmit_tail + 1)
 463                                                 & (SERIAL_XMIT_SIZE - 1);
 464                                         port->xmit_cnt--;
 465                                         txcount--;
 466                                         cnt--;
 467                                         outw(wrd, base);
 468                                 } else {
 469                                         outw(wrd, base);
 470                                         break;
 471                                 }
 472                         }
 473                         if (cnt <= 0)
 474                                 break;
 475                         word_count = cnt >> 1;
 476                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 477                         port->xmit_tail = (port->xmit_tail
 478                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 479                         txcount -= (word_count << 1);
 480                         port->xmit_cnt -= (word_count << 1);
 481                         if (cnt & 0x0001) {
 482                                 residue = YES;
 483                                 wrd = port->port.xmit_buf[port->xmit_tail];
 484                                 port->xmit_tail = (port->xmit_tail + 1)
 485                                         & (SERIAL_XMIT_SIZE - 1);
 486                                 port->xmit_cnt--;
 487                                 txcount--;
 488                         }
 489                 }
 490
 491                 InterruptTheCard(base);
 492                 if (port->xmit_cnt <= 0)
 493                         port->status &= ~ISI_TXOK;
 494                 if (port->xmit_cnt <= WAKEUP_CHARS)
 495                         tty_wakeup(tty);
 496         }
 497
 498 put_unlock:
 499         tty_kref_put(tty);
 500 unlock:
 501         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 502         /*      schedule another tx for hopefully in about 10ms */
 503 sched_again:
 504         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 505 }
 506
 507 /*
 508  *      Main interrupt handler routine
 509  */
 510
 511 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 512 {
 513         struct isi_board *card = dev_id;
 514         struct isi_port *port;
 515         struct tty_struct *tty;
 516         unsigned long base;
 517         u16 header, word_count, count, channel;
 518         short byte_count;
 519         unsigned char *rp;
 520
 521         if (!card || !(card->status & FIRMWARE_LOADED))
 522                 return IRQ_NONE;
 523
 524         base = card->base;
 525
 526         /* did the card interrupt us? */
 527         if (!(inw(base + 0x0e) & 0x02))
 528                 return IRQ_NONE;
 529
 530         spin_lock(&card->card_lock);
 531
 532         /*
 533          * disable any interrupts from the PCI card and lower the
 534          * interrupt line
 535          */
 536         outw(0x8000, base+0x04);
 537         ClearInterrupt(base);
 538
 539         inw(base);              /* get the dummy word out */
 540         header = inw(base);
 541         channel = (header & 0x7800) >> card->shift_count;
 542         byte_count = header & 0xff;
 543
 544         if (channel + 1 > card->port_count) {
 545                 pr_warn("%s(0x%lx): %d(channel) > port_count\n",
 546                         __func__, base, channel + 1);
 547                 outw(0x0000, base+0x04); /* enable interrupts */
 548                 spin_unlock(&card->card_lock);
 549                 return IRQ_HANDLED;
 550         }
 551         port = card->ports + channel;
 552         if (!tty_port_initialized(&port->port)) {
 553                 outw(0x0000, base+0x04); /* enable interrupts */
 554                 spin_unlock(&card->card_lock);
 555                 return IRQ_HANDLED;
 556         }
 557
 558         tty = tty_port_tty_get(&port->port);
 559         if (tty == NULL) {
 560                 word_count = byte_count >> 1;
 561                 while (byte_count > 1) {
 562                         inw(base);
 563                         byte_count -= 2;
 564                 }
 565                 if (byte_count & 0x01)
 566                         inw(base);
 567                 outw(0x0000, base+0x04); /* enable interrupts */
 568                 spin_unlock(&card->card_lock);
 569                 return IRQ_HANDLED;
 570         }
 571
 572         if (header & 0x8000) {          /* Status Packet */
 573                 header = inw(base);
 574                 switch (header & 0xff) {
 575                 case 0: /* Change in EIA signals */
 576                         if (tty_port_check_carrier(&port->port)) {
 577                                 if (port->status & ISI_DCD) {
 578                                         if (!(header & ISI_DCD)) {
 579                                         /* Carrier has been lost  */
 580                                                 pr_debug("%s: DCD->low.\n",
 581                                                          __func__);
 582                                                 port->status &= ~ISI_DCD;
 583                                                 tty_hangup(tty);
 584                                         }
 585                                 } else if (header & ISI_DCD) {
 586                                 /* Carrier has been detected */
 587                                         pr_debug("%s: DCD->high.\n",
 588                                                 __func__);
 589                                         port->status |= ISI_DCD;
 590                                         wake_up_interruptible(&port->port.open_wait);
 591                                 }
 592                         } else {
 593                                 if (header & ISI_DCD)
 594                                         port->status |= ISI_DCD;
 595                                 else
 596                                         port->status &= ~ISI_DCD;
 597                         }
 598
 599                         if (tty_port_cts_enabled(&port->port)) {
 600                                 if (tty->hw_stopped) {
 601                                         if (header & ISI_CTS) {
 602                                                 tty->hw_stopped = 0;
 603                                                 /* start tx ing */
 604                                                 port->status |= (ISI_TXOK
 605                                                         | ISI_CTS);
 606                                                 tty_wakeup(tty);
 607                                         }
 608                                 } else if (!(header & ISI_CTS)) {
 609                                         tty->hw_stopped = 1;
 610                                         /* stop tx ing */
 611                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 612                                 }
 613                         } else {
 614                                 if (header & ISI_CTS)
 615                                         port->status |= ISI_CTS;
 616                                 else
 617                                         port->status &= ~ISI_CTS;
 618                         }
 619
 620                         if (header & ISI_DSR)
 621                                 port->status |= ISI_DSR;
 622                         else
 623                                 port->status &= ~ISI_DSR;
 624
 625                         if (header & ISI_RI)
 626                                 port->status |= ISI_RI;
 627                         else
 628                                 port->status &= ~ISI_RI;
 629
 630                         break;
 631
 632                 case 1: /* Received Break !!! */
 633                         tty_insert_flip_char(&port->port, 0, TTY_BREAK);
 634                         if (port->port.flags & ASYNC_SAK)
 635                                 do_SAK(tty);
 636                         tty_flip_buffer_push(&port->port);
 637                         break;
 638
 639                 case 2: /* Statistics            */
 640                         pr_debug("%s: stats!!!\n", __func__);
 641                         break;
 642
 643                 default:
 644                         pr_debug("%s: Unknown code in status packet.\n",
 645                                  __func__);
 646                         break;
 647                 }
 648         } else {                                /* Data   Packet */
 649                 count = tty_prepare_flip_string(&port->port, &rp,
 650                                 byte_count & ~1);
 651                 pr_debug("%s: Can rx %d of %d bytes.\n",
 652                          __func__, count, byte_count);
 653                 word_count = count >> 1;
 654                 insw(base, rp, word_count);
 655                 byte_count -= (word_count << 1);
 656                 if (count & 0x0001) {
 657                         tty_insert_flip_char(&port->port, inw(base) & 0xff,
 658                                 TTY_NORMAL);
 659                         byte_count -= 2;
 660                 }
 661                 if (byte_count > 0) {
 662                         pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
 663                                  __func__, base, channel + 1);
 664                 /* drain out unread xtra data */
 665                 while (byte_count > 0) {
 666                                 inw(base);
 667                                 byte_count -= 2;
 668                         }
 669                 }
 670                 tty_flip_buffer_push(&port->port);
 671         }
 672         outw(0x0000, base+0x04); /* enable interrupts */
 673         spin_unlock(&card->card_lock);
 674         tty_kref_put(tty);
 675
 676         return IRQ_HANDLED;
 677 }
 678
 679 static void isicom_config_port(struct tty_struct *tty)
 680 {
 681         struct isi_port *port = tty->driver_data;
 682         struct isi_board *card = port->card;
 683         unsigned long baud;
 684         unsigned long base = card->base;
 685         u16 channel_setup, channel = port->channel,
 686                 shift_count = card->shift_count;
 687         unsigned char flow_ctrl;
 688
 689         /* FIXME: Switch to new tty baud API */
 690         baud = C_BAUD(tty);
 691         if (baud & CBAUDEX) {
 692                 baud &= ~CBAUDEX;
 693
 694                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 695                  *  then the card is programmed for 57.6Kbps or 115Kbps
 696                  *  respectively.
 697                  */
 698
 699                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 700                 if (baud < 1 || baud > 4)
 701                         tty->termios.c_cflag &= ~CBAUDEX;
 702                 else
 703                         baud += 15;
 704         }
 705         if (baud == 15) {
 706
 707                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 708                  *  by the set_serial_info ioctl ... this is done by
 709                  *  the 'setserial' utility.
 710                  */
 711
 712                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 713                         baud++; /*  57.6 Kbps */
 714                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 715                         baud += 2; /*  115  Kbps */
 716                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 717                         baud += 3; /* 230 kbps*/
 718                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 719                         baud += 4; /* 460 kbps*/
 720         }
 721         if (linuxb_to_isib[baud] == -1) {
 722                 /* hang up */
 723                 drop_dtr(port);
 724                 return;
 725         } else
 726                 raise_dtr(port);
 727
 728         if (WaitTillCardIsFree(base) == 0) {
 729                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 730                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 731                 channel_setup = 0;
 732                 switch (C_CSIZE(tty)) {
 733                 case CS5:
 734                         channel_setup |= ISICOM_CS5;
 735                         break;
 736                 case CS6:
 737                         channel_setup |= ISICOM_CS6;
 738                         break;
 739                 case CS7:
 740                         channel_setup |= ISICOM_CS7;
 741                         break;
 742                 case CS8:
 743                         channel_setup |= ISICOM_CS8;
 744                         break;
 745                 }
 746
 747                 if (C_CSTOPB(tty))
 748                         channel_setup |= ISICOM_2SB;
 749                 if (C_PARENB(tty)) {
 750                         channel_setup |= ISICOM_EVPAR;
 751                         if (C_PARODD(tty))
 752                                 channel_setup |= ISICOM_ODPAR;
 753                 }
 754                 outw(channel_setup, base);
 755                 InterruptTheCard(base);
 756         }
 757         tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
 758
 759         /* flow control settings ...*/
 760         flow_ctrl = 0;
 761         tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
 762         if (C_CRTSCTS(tty))
 763                 flow_ctrl |= ISICOM_CTSRTS;
 764         if (I_IXON(tty))
 765                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 766         if (I_IXOFF(tty))
 767                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 768
 769         if (WaitTillCardIsFree(base) == 0) {
 770                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 771                 outw(flow_ctrl << 8 | 0x05, base);
 772                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 773                 InterruptTheCard(base);
 774         }
 775
 776         /*      rx enabled -> enable port for rx on the card    */
 777         if (C_CREAD(tty)) {
 778                 card->port_status |= (1 << channel);
 779                 outw(card->port_status, base + 0x02);
 780         }
 781 }
 782
 783 /* open et all */
 784
 785 static inline void isicom_setup_board(struct isi_board *bp)
 786 {
 787         int channel;
 788         struct isi_port *port;
 789
 790         bp->count++;
 791         if (!(bp->status & BOARD_INIT)) {
 792                 port = bp->ports;
 793                 for (channel = 0; channel < bp->port_count; channel++, port++)
 794                         drop_dtr_rts(port);
 795         }
 796         bp->status |= BOARD_ACTIVE | BOARD_INIT;
 797 }
 798
 799 /* Activate and thus setup board are protected from races against shutdown
 800    by the tty_port mutex */
 801
 802 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 803 {
 804         struct isi_port *port = container_of(tport, struct isi_port, port);
 805         struct isi_board *card = port->card;
 806         unsigned long flags;
 807
 808         if (tty_port_alloc_xmit_buf(tport) < 0)
 809                 return -ENOMEM;
 810
 811         spin_lock_irqsave(&card->card_lock, flags);
 812         isicom_setup_board(card);
 813
 814         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 815
 816         /*      discard any residual data       */
 817         if (WaitTillCardIsFree(card->base) == 0) {
 818                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 819                                 card->base);
 820                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 821                 InterruptTheCard(card->base);
 822         }
 823         isicom_config_port(tty);
 824         spin_unlock_irqrestore(&card->card_lock, flags);
 825
 826         return 0;
 827 }
 828
 829 static int isicom_carrier_raised(struct tty_port *port)
 830 {
 831         struct isi_port *ip = container_of(port, struct isi_port, port);
 832         return (ip->status & ISI_DCD)?1 : 0;
 833 }
 834
 835 static struct tty_port *isicom_find_port(struct tty_struct *tty)
 836 {
 837         struct isi_port *port;
 838         struct isi_board *card;
 839         unsigned int board;
 840         int line = tty->index;
 841
 842         board = BOARD(line);
 843         card = &isi_card[board];
 844
 845         if (!(card->status & FIRMWARE_LOADED))
 846                 return NULL;
 847
 848         /*  open on a port greater than the port count for the card !!! */
 849         if (line > ((board * 16) + card->port_count - 1))
 850                 return NULL;
 851
 852         port = &isi_ports[line];
 853         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 854                 return NULL;
 855
 856         return &port->port;
 857 }
 858
 859 static int isicom_open(struct tty_struct *tty, struct file *filp)
 860 {
 861         struct isi_port *port;
 862         struct tty_port *tport;
 863
 864         tport = isicom_find_port(tty);
 865         if (tport == NULL)
 866                 return -ENODEV;
 867         port = container_of(tport, struct isi_port, port);
 868
 869         tty->driver_data = port;
 870         return tty_port_open(tport, tty, filp);
 871 }
 872
 873 /* close et all */
 874
 875 /* card->lock HAS to be held */
 876 static void isicom_shutdown_port(struct isi_port *port)
 877 {
 878         struct isi_board *card = port->card;
 879
 880         if (--card->count < 0) {
 881                 pr_debug("%s: bad board(0x%lx) count %d.\n",
 882                          __func__, card->base, card->count);
 883                 card->count = 0;
 884         }
 885         /* last port was closed, shutdown that board too */
 886         if (!card->count)
 887                 card->status &= BOARD_ACTIVE;
 888 }
 889
 890 static void isicom_flush_buffer(struct tty_struct *tty)
 891 {
 892         struct isi_port *port = tty->driver_data;
 893         struct isi_board *card = port->card;
 894         unsigned long flags;
 895
 896         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 897                 return;
 898
 899         spin_lock_irqsave(&card->card_lock, flags);
 900         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 901         spin_unlock_irqrestore(&card->card_lock, flags);
 902
 903         tty_wakeup(tty);
 904 }
 905
 906 static void isicom_shutdown(struct tty_port *port)
 907 {
 908         struct isi_port *ip = container_of(port, struct isi_port, port);
 909         struct isi_board *card = ip->card;
 910         unsigned long flags;
 911
 912         /* indicate to the card that no more data can be received
 913            on this port */
 914         spin_lock_irqsave(&card->card_lock, flags);
 915         card->port_status &= ~(1 << ip->channel);
 916         outw(card->port_status, card->base + 0x02);
 917         isicom_shutdown_port(ip);
 918         spin_unlock_irqrestore(&card->card_lock, flags);
 919         tty_port_free_xmit_buf(port);
 920 }
 921
 922 static void isicom_close(struct tty_struct *tty, struct file *filp)
 923 {
 924         struct isi_port *ip = tty->driver_data;
 925         struct tty_port *port;
 926
 927         if (ip == NULL)
 928                 return;
 929
 930         port = &ip->port;
 931         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 932                 return;
 933         tty_port_close(port, tty, filp);
 934 }
 935
 936 /* write et all */
 937 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 938         int count)
 939 {
 940         struct isi_port *port = tty->driver_data;
 941         struct isi_board *card = port->card;
 942         unsigned long flags;
 943         int cnt, total = 0;
 944
 945         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 946                 return 0;
 947
 948         spin_lock_irqsave(&card->card_lock, flags);
 949
 950         while (1) {
 951                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 952                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 953                 if (cnt <= 0)
 954                         break;
 955
 956                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 957                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 958                         - 1);
 959                 port->xmit_cnt += cnt;
 960                 buf += cnt;
 961                 count -= cnt;
 962                 total += cnt;
 963         }
 964         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 965                 port->status |= ISI_TXOK;
 966         spin_unlock_irqrestore(&card->card_lock, flags);
 967         return total;
 968 }
 969
 970 /* put_char et all */
 971 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 972 {
 973         struct isi_port *port = tty->driver_data;
 974         struct isi_board *card = port->card;
 975         unsigned long flags;
 976
 977         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 978                 return 0;
 979
 980         spin_lock_irqsave(&card->card_lock, flags);
 981         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 982                 spin_unlock_irqrestore(&card->card_lock, flags);
 983                 return 0;
 984         }
 985
 986         port->port.xmit_buf[port->xmit_head++] = ch;
 987         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 988         port->xmit_cnt++;
 989         spin_unlock_irqrestore(&card->card_lock, flags);
 990         return 1;
 991 }
 992
 993 /* flush_chars et all */
 994 static void isicom_flush_chars(struct tty_struct *tty)
 995 {
 996         struct isi_port *port = tty->driver_data;
 997
 998         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
 999                 return;
1000
1001         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1002                         !port->port.xmit_buf)
1003                 return;
1004
1005         /* this tells the transmitter to consider this port for
1006            data output to the card ... that's the best we can do. */
1007         port->status |= ISI_TXOK;
1008 }
1009
1010 /* write_room et all */
1011 static int isicom_write_room(struct tty_struct *tty)
1012 {
1013         struct isi_port *port = tty->driver_data;
1014         int free;
1015
1016         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1017                 return 0;
1018
1019         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1020         if (free < 0)
1021                 free = 0;
1022         return free;
1023 }
1024
1025 /* chars_in_buffer et all */
1026 static int isicom_chars_in_buffer(struct tty_struct *tty)
1027 {
1028         struct isi_port *port = tty->driver_data;
1029         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1030                 return 0;
1031         return port->xmit_cnt;
1032 }
1033
1034 /* ioctl et all */
1035 static int isicom_send_break(struct tty_struct *tty, int length)
1036 {
1037         struct isi_port *port = tty->driver_data;
1038         struct isi_board *card = port->card;
1039         unsigned long base = card->base;
1040
1041         if (length == -1)
1042                 return -EOPNOTSUPP;
1043
1044         if (!lock_card(card))
1045                 return -EINVAL;
1046
1047         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1048         outw((length & 0xff) << 8 | 0x00, base);
1049         outw((length & 0xff00u), base);
1050         InterruptTheCard(base);
1051
1052         unlock_card(card);
1053         return 0;
1054 }
1055
1056 static int isicom_tiocmget(struct tty_struct *tty)
1057 {
1058         struct isi_port *port = tty->driver_data;
1059         /* just send the port status */
1060         u16 status = port->status;
1061
1062         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1063                 return -ENODEV;
1064
1065         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1066                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1067                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1068                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1069                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1070                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1071 }
1072
1073 static int isicom_tiocmset(struct tty_struct *tty,
1074                                         unsigned int set, unsigned int clear)
1075 {
1076         struct isi_port *port = tty->driver_data;
1077         unsigned long flags;
1078
1079         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1080                 return -ENODEV;
1081
1082         spin_lock_irqsave(&port->card->card_lock, flags);
1083         if (set & TIOCM_RTS)
1084                 raise_rts(port);
1085         if (set & TIOCM_DTR)
1086                 raise_dtr(port);
1087
1088         if (clear & TIOCM_RTS)
1089                 drop_rts(port);
1090         if (clear & TIOCM_DTR)
1091                 drop_dtr(port);
1092         spin_unlock_irqrestore(&port->card->card_lock, flags);
1093
1094         return 0;
1095 }
1096
1097 static int isicom_set_serial_info(struct tty_struct *tty,
1098                                         struct serial_struct __user *info)
1099 {
1100         struct isi_port *port = tty->driver_data;
1101         struct serial_struct newinfo;
1102         int reconfig_port;
1103
1104         if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1105                 return -EFAULT;
1106
1107         mutex_lock(&port->port.mutex);
1108         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1109                 (newinfo.flags & ASYNC_SPD_MASK));
1110
1111         if (!capable(CAP_SYS_ADMIN)) {
1112                 if ((newinfo.close_delay != port->port.close_delay) ||
1113                                 (newinfo.closing_wait != port->port.closing_wait) ||
1114                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1115                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1116                         mutex_unlock(&port->port.mutex);
1117                         return -EPERM;
1118                 }
1119                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1120                                 (newinfo.flags & ASYNC_USR_MASK));
1121         } else {
1122                 port->port.close_delay = newinfo.close_delay;
1123                 port->port.closing_wait = newinfo.closing_wait;
1124                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1125                                 (newinfo.flags & ASYNC_FLAGS));
1126         }
1127         if (reconfig_port) {
1128                 unsigned long flags;
1129                 spin_lock_irqsave(&port->card->card_lock, flags);
1130                 isicom_config_port(tty);
1131                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1132         }
1133         mutex_unlock(&port->port.mutex);
1134         return 0;
1135 }
1136
1137 static int isicom_get_serial_info(struct isi_port *port,
1138         struct serial_struct __user *info)
1139 {
1140         struct serial_struct out_info;
1141
1142         mutex_lock(&port->port.mutex);
1143         memset(&out_info, 0, sizeof(out_info));
1144 /*      out_info.type = ? */
1145         out_info.line = port - isi_ports;
1146         out_info.port = port->card->base;
1147         out_info.irq = port->card->irq;
1148         out_info.flags = port->port.flags;
1149 /*      out_info.baud_base = ? */
1150         out_info.close_delay = port->port.close_delay;
1151         out_info.closing_wait = port->port.closing_wait;
1152         mutex_unlock(&port->port.mutex);
1153         if (copy_to_user(info, &out_info, sizeof(out_info)))
1154                 return -EFAULT;
1155         return 0;
1156 }
1157
1158 static int isicom_ioctl(struct tty_struct *tty,
1159         unsigned int cmd, unsigned long arg)
1160 {
1161         struct isi_port *port = tty->driver_data;
1162         void __user *argp = (void __user *)arg;
1163
1164         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1165                 return -ENODEV;
1166
1167         switch (cmd) {
1168         case TIOCGSERIAL:
1169                 return isicom_get_serial_info(port, argp);
1170
1171         case TIOCSSERIAL:
1172                 return isicom_set_serial_info(tty, argp);
1173
1174         default:
1175                 return -ENOIOCTLCMD;
1176         }
1177         return 0;
1178 }
1179
1180 /* set_termios et all */
1181 static void isicom_set_termios(struct tty_struct *tty,
1182         struct ktermios *old_termios)
1183 {
1184         struct isi_port *port = tty->driver_data;
1185         unsigned long flags;
1186
1187         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1188                 return;
1189
1190         if (tty->termios.c_cflag == old_termios->c_cflag &&
1191                         tty->termios.c_iflag == old_termios->c_iflag)
1192                 return;
1193
1194         spin_lock_irqsave(&port->card->card_lock, flags);
1195         isicom_config_port(tty);
1196         spin_unlock_irqrestore(&port->card->card_lock, flags);
1197
1198         if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1199                 tty->hw_stopped = 0;
1200                 isicom_start(tty);
1201         }
1202 }
1203
1204 /* throttle et all */
1205 static void isicom_throttle(struct tty_struct *tty)
1206 {
1207         struct isi_port *port = tty->driver_data;
1208         struct isi_board *card = port->card;
1209
1210         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1211                 return;
1212
1213         /* tell the card that this port cannot handle any more data for now */
1214         card->port_status &= ~(1 << port->channel);
1215         outw(card->port_status, card->base + 0x02);
1216 }
1217
1218 /* unthrottle et all */
1219 static void isicom_unthrottle(struct tty_struct *tty)
1220 {
1221         struct isi_port *port = tty->driver_data;
1222         struct isi_board *card = port->card;
1223
1224         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1225                 return;
1226
1227         /* tell the card that this port is ready to accept more data */
1228         card->port_status |= (1 << port->channel);
1229         outw(card->port_status, card->base + 0x02);
1230 }
1231
1232 /* stop et all */
1233 static void isicom_stop(struct tty_struct *tty)
1234 {
1235         struct isi_port *port = tty->driver_data;
1236
1237         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1238                 return;
1239
1240         /* this tells the transmitter not to consider this port for
1241            data output to the card. */
1242         port->status &= ~ISI_TXOK;
1243 }
1244
1245 /* start et all */
1246 static void isicom_start(struct tty_struct *tty)
1247 {
1248         struct isi_port *port = tty->driver_data;
1249
1250         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1251                 return;
1252
1253         /* this tells the transmitter to consider this port for
1254            data output to the card. */
1255         port->status |= ISI_TXOK;
1256 }
1257
1258 static void isicom_hangup(struct tty_struct *tty)
1259 {
1260         struct isi_port *port = tty->driver_data;
1261
1262         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1263                 return;
1264         tty_port_hangup(&port->port);
1265 }
1266
1267
1268 /*
1269  * Driver init and deinit functions
1270  */
1271
1272 static const struct tty_operations isicom_ops = {
1273         .open                   = isicom_open,
1274         .close                  = isicom_close,
1275         .write                  = isicom_write,
1276         .put_char               = isicom_put_char,
1277         .flush_chars            = isicom_flush_chars,
1278         .write_room             = isicom_write_room,
1279         .chars_in_buffer        = isicom_chars_in_buffer,
1280         .ioctl                  = isicom_ioctl,
1281         .set_termios            = isicom_set_termios,
1282         .throttle               = isicom_throttle,
1283         .unthrottle             = isicom_unthrottle,
1284         .stop                   = isicom_stop,
1285         .start                  = isicom_start,
1286         .hangup                 = isicom_hangup,
1287         .flush_buffer           = isicom_flush_buffer,
1288         .tiocmget               = isicom_tiocmget,
1289         .tiocmset               = isicom_tiocmset,
1290         .break_ctl              = isicom_send_break,
1291 };
1292
1293 static const struct tty_port_operations isicom_port_ops = {
1294         .carrier_raised         = isicom_carrier_raised,
1295         .dtr_rts                = isicom_dtr_rts,
1296         .activate               = isicom_activate,
1297         .shutdown               = isicom_shutdown,
1298 };
1299
1300 static int reset_card(struct pci_dev *pdev,
1301         const unsigned int card, unsigned int *signature)
1302 {
1303         struct isi_board *board = pci_get_drvdata(pdev);
1304         unsigned long base = board->base;
1305         unsigned int sig, portcount = 0;
1306         int retval = 0;
1307
1308         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1309                 base);
1310
1311         inw(base + 0x8);
1312
1313         msleep(10);
1314
1315         outw(0, base + 0x8); /* Reset */
1316
1317         msleep(1000);
1318
1319         sig = inw(base + 0x4) & 0xff;
1320
1321         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1322                         sig != 0xee) {
1323                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1324                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1325                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1326                 retval = -EIO;
1327                 goto end;
1328         }
1329
1330         msleep(10);
1331
1332         portcount = inw(base + 0x2);
1333         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1334                                 portcount != 8 && portcount != 16)) {
1335                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1336                         card + 1);
1337                 retval = -EIO;
1338                 goto end;
1339         }
1340
1341         switch (sig) {
1342         case 0xa5:
1343         case 0xbb:
1344         case 0xdd:
1345                 board->port_count = (portcount == 4) ? 4 : 8;
1346                 board->shift_count = 12;
1347                 break;
1348         case 0xcc:
1349         case 0xee:
1350                 board->port_count = 16;
1351                 board->shift_count = 11;
1352                 break;
1353         }
1354         dev_info(&pdev->dev, "-Done\n");
1355         *signature = sig;
1356
1357 end:
1358         return retval;
1359 }
1360
1361 static int load_firmware(struct pci_dev *pdev,
1362         const unsigned int index, const unsigned int signature)
1363 {
1364         struct isi_board *board = pci_get_drvdata(pdev);
1365         const struct firmware *fw;
1366         unsigned long base = board->base;
1367         unsigned int a;
1368         u16 word_count, status;
1369         int retval = -EIO;
1370         char *name;
1371         u8 *data;
1372
1373         struct stframe {
1374                 u16     addr;
1375                 u16     count;
1376                 u8      data[0];
1377         } *frame;
1378
1379         switch (signature) {
1380         case 0xa5:
1381                 name = "isi608.bin";
1382                 break;
1383         case 0xbb:
1384                 name = "isi608em.bin";
1385                 break;
1386         case 0xcc:
1387                 name = "isi616em.bin";
1388                 break;
1389         case 0xdd:
1390                 name = "isi4608.bin";
1391                 break;
1392         case 0xee:
1393                 name = "isi4616.bin";
1394                 break;
1395         default:
1396                 dev_err(&pdev->dev, "Unknown signature.\n");
1397                 goto end;
1398         }
1399
1400         retval = request_firmware(&fw, name, &pdev->dev);
1401         if (retval)
1402                 goto end;
1403
1404         retval = -EIO;
1405
1406         for (frame = (struct stframe *)fw->data;
1407                         frame < (struct stframe *)(fw->data + fw->size);
1408                         frame = (struct stframe *)((u8 *)(frame + 1) +
1409                                 frame->count)) {
1410                 if (WaitTillCardIsFree(base))
1411                         goto errrelfw;
1412
1413                 outw(0xf0, base);       /* start upload sequence */
1414                 outw(0x00, base);
1415                 outw(frame->addr, base); /* lsb of address */
1416
1417                 word_count = frame->count / 2 + frame->count % 2;
1418                 outw(word_count, base);
1419                 InterruptTheCard(base);
1420
1421                 udelay(100); /* 0x2f */
1422
1423                 if (WaitTillCardIsFree(base))
1424                         goto errrelfw;
1425
1426                 status = inw(base + 0x4);
1427                 if (status != 0) {
1428                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1429                                  "Address:0x%x\n"
1430                                  "Count:0x%x\n"
1431                                  "Status:0x%x\n",
1432                                  index + 1, frame->addr, frame->count, status);
1433                         goto errrelfw;
1434                 }
1435                 outsw(base, frame->data, word_count);
1436
1437                 InterruptTheCard(base);
1438
1439                 udelay(50); /* 0x0f */
1440
1441                 if (WaitTillCardIsFree(base))
1442                         goto errrelfw;
1443
1444                 status = inw(base + 0x4);
1445                 if (status != 0) {
1446                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1447                                 "Status:0x%x\n", index + 1, status);
1448                         goto errrelfw;
1449                 }
1450         }
1451
1452 /* XXX: should we test it by reading it back and comparing with original like
1453  * in load firmware package? */
1454         for (frame = (struct stframe *)fw->data;
1455                         frame < (struct stframe *)(fw->data + fw->size);
1456                         frame = (struct stframe *)((u8 *)(frame + 1) +
1457                                 frame->count)) {
1458                 if (WaitTillCardIsFree(base))
1459                         goto errrelfw;
1460
1461                 outw(0xf1, base); /* start download sequence */
1462                 outw(0x00, base);
1463                 outw(frame->addr, base); /* lsb of address */
1464
1465                 word_count = (frame->count >> 1) + frame->count % 2;
1466                 outw(word_count + 1, base);
1467                 InterruptTheCard(base);
1468
1469                 udelay(50); /* 0xf */
1470
1471                 if (WaitTillCardIsFree(base))
1472                         goto errrelfw;
1473
1474                 status = inw(base + 0x4);
1475                 if (status != 0) {
1476                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1477                                  "Address:0x%x\n"
1478                                  "Count:0x%x\n"
1479                                  "Status: 0x%x\n",
1480                                  index + 1, frame->addr, frame->count, status);
1481                         goto errrelfw;
1482                 }
1483
1484                 data = kmalloc(word_count * 2, GFP_KERNEL);
1485                 if (data == NULL) {
1486                         dev_err(&pdev->dev, "Card%d, firmware upload "
1487                                 "failed, not enough memory\n", index + 1);
1488                         goto errrelfw;
1489                 }
1490                 inw(base);
1491                 insw(base, data, word_count);
1492                 InterruptTheCard(base);
1493
1494                 for (a = 0; a < frame->count; a++)
1495                         if (data[a] != frame->data[a]) {
1496                                 kfree(data);
1497                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1498                                         "failed\n", index + 1);
1499                                 goto errrelfw;
1500                         }
1501                 kfree(data);
1502
1503                 udelay(50); /* 0xf */
1504
1505                 if (WaitTillCardIsFree(base))
1506                         goto errrelfw;
1507
1508                 status = inw(base + 0x4);
1509                 if (status != 0) {
1510                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1511                                 "Card Status:0x%x\n", index + 1, status);
1512                         goto errrelfw;
1513                 }
1514         }
1515
1516         /* xfer ctrl */
1517         if (WaitTillCardIsFree(base))
1518                 goto errrelfw;
1519
1520         outw(0xf2, base);
1521         outw(0x800, base);
1522         outw(0x0, base);
1523         outw(0x0, base);
1524         InterruptTheCard(base);
1525         outw(0x0, base + 0x4); /* for ISI4608 cards */
1526
1527         board->status |= FIRMWARE_LOADED;
1528         retval = 0;
1529
1530 errrelfw:
1531         release_firmware(fw);
1532 end:
1533         return retval;
1534 }
1535
1536 /*
1537  *      Insmod can set static symbols so keep these static
1538  */
1539 static unsigned int card_count;
1540
1541 static int isicom_probe(struct pci_dev *pdev,
1542         const struct pci_device_id *ent)
1543 {
1544         unsigned int uninitialized_var(signature), index;
1545         int retval = -EPERM;
1546         struct isi_board *board = NULL;
1547
1548         if (card_count >= BOARD_COUNT)
1549                 goto err;
1550
1551         retval = pci_enable_device(pdev);
1552         if (retval) {
1553                 dev_err(&pdev->dev, "failed to enable\n");
1554                 goto err;
1555         }
1556
1557         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1558
1559         /* allot the first empty slot in the array */
1560         for (index = 0; index < BOARD_COUNT; index++) {
1561                 if (isi_card[index].base == 0) {
1562                         board = &isi_card[index];
1563                         break;
1564                 }
1565         }
1566         if (index == BOARD_COUNT) {
1567                 retval = -ENODEV;
1568                 goto err_disable;
1569         }
1570
1571         board->index = index;
1572         board->base = pci_resource_start(pdev, 3);
1573         board->irq = pdev->irq;
1574         card_count++;
1575
1576         pci_set_drvdata(pdev, board);
1577
1578         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1579         if (retval) {
1580                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1581                         "will be disabled.\n", board->base, board->base + 15,
1582                         index + 1);
1583                 retval = -EBUSY;
1584                 goto errdec;
1585         }
1586
1587         retval = request_irq(board->irq, isicom_interrupt,
1588                         IRQF_SHARED, ISICOM_NAME, board);
1589         if (retval < 0) {
1590                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1591                         "Card%d will be disabled.\n", board->irq, index + 1);
1592                 goto errunrr;
1593         }
1594
1595         retval = reset_card(pdev, index, &signature);
1596         if (retval < 0)
1597                 goto errunri;
1598
1599         retval = load_firmware(pdev, index, signature);
1600         if (retval < 0)
1601                 goto errunri;
1602
1603         for (index = 0; index < board->port_count; index++) {
1604                 struct tty_port *tport = &board->ports[index].port;
1605                 tty_port_init(tport);
1606                 tport->ops = &isicom_port_ops;
1607                 tport->close_delay = 50 * HZ/100;
1608                 tport->closing_wait = 3000 * HZ/100;
1609                 tty_port_register_device(tport, isicom_normal,
1610                                 board->index * 16 + index, &pdev->dev);
1611         }
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 err_disable:
1623         pci_disable_device(pdev);
1624 err:
1625         return retval;
1626 }
1627
1628 static void isicom_remove(struct pci_dev *pdev)
1629 {
1630         struct isi_board *board = pci_get_drvdata(pdev);
1631         unsigned int i;
1632
1633         for (i = 0; i < board->port_count; i++) {
1634                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1635                 tty_port_destroy(&board->ports[i].port);
1636         }
1637
1638         free_irq(board->irq, board);
1639         pci_release_region(pdev, 3);
1640         board->base = 0;
1641         card_count--;
1642         pci_disable_device(pdev);
1643 }
1644
1645 static int __init isicom_init(void)
1646 {
1647         int retval, idx, channel;
1648         struct isi_port *port;
1649
1650         for (idx = 0; idx < BOARD_COUNT; idx++) {
1651                 port = &isi_ports[idx * 16];
1652                 isi_card[idx].ports = port;
1653                 spin_lock_init(&isi_card[idx].card_lock);
1654                 for (channel = 0; channel < 16; channel++, port++) {
1655                         port->magic = ISICOM_MAGIC;
1656                         port->card = &isi_card[idx];
1657                         port->channel = channel;
1658                         port->status = 0;
1659                         /*  . . .  */
1660                 }
1661                 isi_card[idx].base = 0;
1662                 isi_card[idx].irq = 0;
1663         }
1664
1665         /* tty driver structure initialization */
1666         isicom_normal = alloc_tty_driver(PORT_COUNT);
1667         if (!isicom_normal) {
1668                 retval = -ENOMEM;
1669                 goto error;
1670         }
1671
1672         isicom_normal->name                     = "ttyM";
1673         isicom_normal->major                    = ISICOM_NMAJOR;
1674         isicom_normal->minor_start              = 0;
1675         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1676         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1677         isicom_normal->init_termios             = tty_std_termios;
1678         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1679                 CLOCAL;
1680         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1681                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1682         tty_set_operations(isicom_normal, &isicom_ops);
1683
1684         retval = tty_register_driver(isicom_normal);
1685         if (retval) {
1686                 pr_debug("Couldn't register the dialin driver\n");
1687                 goto err_puttty;
1688         }
1689
1690         retval = pci_register_driver(&isicom_driver);
1691         if (retval < 0) {
1692                 pr_err("Unable to register pci driver.\n");
1693                 goto err_unrtty;
1694         }
1695
1696         mod_timer(&tx, jiffies + 1);
1697
1698         return 0;
1699 err_unrtty:
1700         tty_unregister_driver(isicom_normal);
1701 err_puttty:
1702         put_tty_driver(isicom_normal);
1703 error:
1704         return retval;
1705 }
1706
1707 static void __exit isicom_exit(void)
1708 {
1709         del_timer_sync(&tx);
1710
1711         pci_unregister_driver(&isicom_driver);
1712         tty_unregister_driver(isicom_normal);
1713         put_tty_driver(isicom_normal);
1714 }
1715
1716 module_init(isicom_init);
1717 module_exit(isicom_exit);
1718
1719 MODULE_AUTHOR("MultiTech");
1720 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1721 MODULE_LICENSE("GPL");
1722 MODULE_FIRMWARE("isi608.bin");
1723 MODULE_FIRMWARE("isi608em.bin");
1724 MODULE_FIRMWARE("isi616em.bin");
1725 MODULE_FIRMWARE("isi4608.bin");
1726 MODULE_FIRMWARE("isi4616.bin");