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   1 /*
   2  *      This program is free software; you can redistribute it and/or
   3  *      modify it under the terms of the GNU General Public License
   4  *      as published by the Free Software Foundation; either version
   5  *      2 of the License, or (at your option) any later version.
   6  *
   7  *      Original driver code supplied by Multi-Tech
   8  *
   9  *      Changes
  10  *      1/9/98  alan@lxorguk.ukuu.org.uk
  11  *                                      Merge to 2.0.x kernel tree
  12  *                                      Obtain and use official major/minors
  13  *                                      Loader switched to a misc device
  14  *                                      (fixed range check bug as a side effect)
  15  *                                      Printk clean up
  16  *      9/12/98 alan@lxorguk.ukuu.org.uk
  17  *                                      Rough port to 2.1.x
  18  *
  19  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  20  *                                      a new unified driver.
  21  *
  22  *      3/9/99  sameer                  Added support for ISI4616 cards.
  23  *
  24  *      16/9/99 sameer                  We do not force RTS low anymore.
  25  *                                      This is to prevent the firmware
  26  *                                      from getting confused.
  27  *
  28  *      26/10/99 sameer                 Cosmetic changes:The driver now
  29  *                                      dumps the Port Count information
  30  *                                      along with I/O address and IRQ.
  31  *
  32  *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
  33  *
  34  *      10/5/00  sameer                 Fixed isicom_shutdown_board()
  35  *                                      to not lower DTR on all the ports
  36  *                                      when the last port on the card is
  37  *                                      closed.
  38  *
  39  *      10/5/00  sameer                 Signal mask setup command added
  40  *                                      to  isicom_setup_port and
  41  *                                      isicom_shutdown_port.
  42  *
  43  *      24/5/00  sameer                 The driver is now SMP aware.
  44  *
  45  *
  46  *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
  47  *
  48  *
  49  *      03/01/01  anil .s               Added support for resetting the
  50  *                                      internal modems on ISI cards.
  51  *
  52  *      08/02/01  anil .s               Upgraded the driver for kernel
  53  *                                      2.4.x
  54  *
  55  *      11/04/01  Kevin                 Fixed firmware load problem with
  56  *                                      ISIHP-4X card
  57  *
  58  *      30/04/01  anil .s               Fixed the remote login through
  59  *                                      ISI port problem. Now the link
  60  *                                      does not go down before password
  61  *                                      prompt.
  62  *
  63  *      03/05/01  anil .s               Fixed the problem with IRQ sharing
  64  *                                      among ISI-PCI cards.
  65  *
  66  *      03/05/01  anil .s               Added support to display the version
  67  *                                      info during insmod as well as module
  68  *                                      listing by lsmod.
  69  *
  70  *      10/05/01  anil .s               Done the modifications to the source
  71  *                                      file and Install script so that the
  72  *                                      same installation can be used for
  73  *                                      2.2.x and 2.4.x kernel.
  74  *
  75  *      06/06/01  anil .s               Now we drop both dtr and rts during
  76  *                                      shutdown_port as well as raise them
  77  *                                      during isicom_config_port.
  78  *
  79  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  80  *                                      restore_flags on failure in
  81  *                                      isicom_send_break, verify put_user
  82  *                                      result
  83  *
  84  *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
  85  *                                      Baud index extended to 21
  86  *
  87  *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
  88  *                                      Taken care of license warning.
  89  *
  90  *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
  91  *                                      Red Hat Distribution
  92  *
  93  *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
  94  *                                      into a single 2.6 driver
  95  *
  96  *      ***********************************************************
  97  *
  98  *      To use this driver you also need the support package. You
  99  *      can find this in RPM format on
 100  *              ftp://ftp.linux.org.uk/pub/linux/alan
 101  *
 102  *      You can find the original tools for this direct from Multitech
 103  *              ftp://ftp.multitech.com/ISI-Cards/
 104  *
 105  *      Having installed the cards the module options (/etc/modprobe.conf)
 106  *
 107  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
 108  *
 109  *      Omit those entries for boards you don't have installed.
 110  *
 111  *      TODO
 112  *              Merge testing
 113  *              64-bit verification
 114  */
 115
 116 #include <linux/module.h>
 117 #include <linux/firmware.h>
 118 #include <linux/kernel.h>
 119 #include <linux/tty.h>
 120 #include <linux/tty_flip.h>
 121 #include <linux/termios.h>
 122 #include <linux/fs.h>
 123 #include <linux/sched.h>
 124 #include <linux/serial.h>
 125 #include <linux/smp_lock.h>
 126 #include <linux/mm.h>
 127 #include <linux/interrupt.h>
 128 #include <linux/timer.h>
 129 #include <linux/delay.h>
 130 #include <linux/ioport.h>
 131
 132 #include <linux/uaccess.h>
 133 #include <linux/io.h>
 134 #include <asm/system.h>
 135
 136 #include <linux/pci.h>
 137
 138 #include <linux/isicom.h>
 139
 140 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 141 #define ClearInterrupt(base) inw((base) + 0x0a)
 142
 143 #define pr_dbg(str...) pr_debug("ISICOM: " str)
 144 #ifdef DEBUG
 145 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 146 #else
 147 #define isicom_paranoia_check(a, b, c) 0
 148 #endif
 149
 150 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 151 static void __devexit isicom_remove(struct pci_dev *);
 152
 153 static struct pci_device_id isicom_pci_tbl[] = {
 154         { PCI_DEVICE(VENDOR_ID, 0x2028) },
 155         { PCI_DEVICE(VENDOR_ID, 0x2051) },
 156         { PCI_DEVICE(VENDOR_ID, 0x2052) },
 157         { PCI_DEVICE(VENDOR_ID, 0x2053) },
 158         { PCI_DEVICE(VENDOR_ID, 0x2054) },
 159         { PCI_DEVICE(VENDOR_ID, 0x2055) },
 160         { PCI_DEVICE(VENDOR_ID, 0x2056) },
 161         { PCI_DEVICE(VENDOR_ID, 0x2057) },
 162         { PCI_DEVICE(VENDOR_ID, 0x2058) },
 163         { 0 }
 164 };
 165 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 166
 167 static struct pci_driver isicom_driver = {
 168         .name           = "isicom",
 169         .id_table       = isicom_pci_tbl,
 170         .probe          = isicom_probe,
 171         .remove         = __devexit_p(isicom_remove)
 172 };
 173
 174 static int prev_card = 3;       /*      start servicing isi_card[0]     */
 175 static struct tty_driver *isicom_normal;
 176
 177 static void isicom_tx(unsigned long _data);
 178 static void isicom_start(struct tty_struct *tty);
 179
 180 static DEFINE_TIMER(tx, isicom_tx, 0, 0);
 181
 182 /*   baud index mappings from linux defns to isi */
 183
 184 static signed char linuxb_to_isib[] = {
 185         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 186 };
 187
 188 struct  isi_board {
 189         unsigned long           base;
 190         int                     irq;
 191         unsigned char           port_count;
 192         unsigned short          status;
 193         unsigned short          port_status; /* each bit for each port */
 194         unsigned short          shift_count;
 195         struct isi_port         *ports;
 196         signed char             count;
 197         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 198         unsigned long           flags;
 199         unsigned int            index;
 200 };
 201
 202 struct  isi_port {
 203         unsigned short          magic;
 204         struct tty_port         port;
 205         u16                     channel;
 206         u16                     status;
 207         struct isi_board        *card;
 208         unsigned char           *xmit_buf;
 209         int                     xmit_head;
 210         int                     xmit_tail;
 211         int                     xmit_cnt;
 212 };
 213
 214 static struct isi_board isi_card[BOARD_COUNT];
 215 static struct isi_port  isi_ports[PORT_COUNT];
 216
 217 /*
 218  *      Locking functions for card level locking. We need to own both
 219  *      the kernel lock for the card and have the card in a position that
 220  *      it wants to talk.
 221  */
 222
 223 static inline int WaitTillCardIsFree(unsigned long base)
 224 {
 225         unsigned int count = 0;
 226         unsigned int a = in_atomic(); /* do we run under spinlock? */
 227
 228         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 229                 if (a)
 230                         mdelay(1);
 231                 else
 232                         msleep(1);
 233
 234         return !(inw(base + 0xe) & 0x1);
 235 }
 236
 237 static int lock_card(struct isi_board *card)
 238 {
 239         unsigned long base = card->base;
 240         unsigned int retries, a;
 241
 242         for (retries = 0; retries < 10; retries++) {
 243                 spin_lock_irqsave(&card->card_lock, card->flags);
 244                 for (a = 0; a < 10; a++) {
 245                         if (inw(base + 0xe) & 0x1)
 246                                 return 1;
 247                         udelay(10);
 248                 }
 249                 spin_unlock_irqrestore(&card->card_lock, card->flags);
 250                 msleep(10);
 251         }
 252         printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
 253                 card->base);
 254
 255         return 0;       /* Failed to acquire the card! */
 256 }
 257
 258 static void unlock_card(struct isi_board *card)
 259 {
 260         spin_unlock_irqrestore(&card->card_lock, card->flags);
 261 }
 262
 263 /*
 264  *  ISI Card specific ops ...
 265  */
 266
 267 /* card->lock HAS to be held */
 268 static void raise_dtr(struct isi_port *port)
 269 {
 270         struct isi_board *card = port->card;
 271         unsigned long base = card->base;
 272         u16 channel = port->channel;
 273
 274         if (WaitTillCardIsFree(base))
 275                 return;
 276
 277         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 278         outw(0x0504, base);
 279         InterruptTheCard(base);
 280         port->status |= ISI_DTR;
 281 }
 282
 283 /* card->lock HAS to be held */
 284 static inline void drop_dtr(struct isi_port *port)
 285 {
 286         struct isi_board *card = port->card;
 287         unsigned long base = card->base;
 288         u16 channel = port->channel;
 289
 290         if (WaitTillCardIsFree(base))
 291                 return;
 292
 293         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 294         outw(0x0404, base);
 295         InterruptTheCard(base);
 296         port->status &= ~ISI_DTR;
 297 }
 298
 299 /* card->lock HAS to be held */
 300 static inline void raise_rts(struct isi_port *port)
 301 {
 302         struct isi_board *card = port->card;
 303         unsigned long base = card->base;
 304         u16 channel = port->channel;
 305
 306         if (WaitTillCardIsFree(base))
 307                 return;
 308
 309         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 310         outw(0x0a04, base);
 311         InterruptTheCard(base);
 312         port->status |= ISI_RTS;
 313 }
 314
 315 /* card->lock HAS to be held */
 316 static inline void drop_rts(struct isi_port *port)
 317 {
 318         struct isi_board *card = port->card;
 319         unsigned long base = card->base;
 320         u16 channel = port->channel;
 321
 322         if (WaitTillCardIsFree(base))
 323                 return;
 324
 325         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 326         outw(0x0804, base);
 327         InterruptTheCard(base);
 328         port->status &= ~ISI_RTS;
 329 }
 330
 331 /* card->lock MUST NOT be held */
 332
 333 static void isicom_dtr_rts(struct tty_port *port, int on)
 334 {
 335         struct isi_port *ip = container_of(port, struct isi_port, port);
 336         struct isi_board *card = ip->card;
 337         unsigned long base = card->base;
 338         u16 channel = ip->channel;
 339
 340         if (!lock_card(card))
 341                 return;
 342
 343         if (on) {
 344                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 345                 outw(0x0f04, base);
 346                 InterruptTheCard(base);
 347                 ip->status |= (ISI_DTR | ISI_RTS);
 348         } else {
 349                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 350                 outw(0x0C04, base);
 351                 InterruptTheCard(base);
 352                 ip->status &= ~(ISI_DTR | ISI_RTS);
 353         }
 354         unlock_card(card);
 355 }
 356
 357 /* card->lock HAS to be held */
 358 static void drop_dtr_rts(struct isi_port *port)
 359 {
 360         struct isi_board *card = port->card;
 361         unsigned long base = card->base;
 362         u16 channel = port->channel;
 363
 364         if (WaitTillCardIsFree(base))
 365                 return;
 366
 367         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 368         outw(0x0c04, base);
 369         InterruptTheCard(base);
 370         port->status &= ~(ISI_RTS | ISI_DTR);
 371 }
 372
 373 /*
 374  *      ISICOM Driver specific routines ...
 375  *
 376  */
 377
 378 static inline int __isicom_paranoia_check(struct isi_port const *port,
 379         char *name, const char *routine)
 380 {
 381         if (!port) {
 382                 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
 383                         "dev %s in %s.\n", name, routine);
 384                 return 1;
 385         }
 386         if (port->magic != ISICOM_MAGIC) {
 387                 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
 388                         "dev %s in %s.\n", name, routine);
 389                 return 1;
 390         }
 391
 392         return 0;
 393 }
 394
 395 /*
 396  *      Transmitter.
 397  *
 398  *      We shovel data into the card buffers on a regular basis. The card
 399  *      will do the rest of the work for us.
 400  */
 401
 402 static void isicom_tx(unsigned long _data)
 403 {
 404         unsigned long flags, base;
 405         unsigned int retries;
 406         short count = (BOARD_COUNT-1), card;
 407         short txcount, wrd, residue, word_count, cnt;
 408         struct isi_port *port;
 409         struct tty_struct *tty;
 410
 411         /*      find next active board  */
 412         card = (prev_card + 1) & 0x0003;
 413         while (count-- > 0) {
 414                 if (isi_card[card].status & BOARD_ACTIVE)
 415                         break;
 416                 card = (card + 1) & 0x0003;
 417         }
 418         if (!(isi_card[card].status & BOARD_ACTIVE))
 419                 goto sched_again;
 420
 421         prev_card = card;
 422
 423         count = isi_card[card].port_count;
 424         port = isi_card[card].ports;
 425         base = isi_card[card].base;
 426
 427         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 428         for (retries = 0; retries < 100; retries++) {
 429                 if (inw(base + 0xe) & 0x1)
 430                         break;
 431                 udelay(2);
 432         }
 433         if (retries >= 100)
 434                 goto unlock;
 435
 436         tty = tty_port_tty_get(&port->port);
 437         if (tty == NULL)
 438                 goto put_unlock;
 439
 440         for (; count > 0; count--, port++) {
 441                 /* port not active or tx disabled to force flow control */
 442                 if (!(port->port.flags & ASYNC_INITIALIZED) ||
 443                                 !(port->status & ISI_TXOK))
 444                         continue;
 445
 446                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 447                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 448                         continue;
 449
 450                 if (!(inw(base + 0x02) & (1 << port->channel)))
 451                         continue;
 452
 453                 pr_dbg("txing %d bytes, port%d.\n", txcount,
 454                         port->channel + 1);
 455                 outw((port->channel << isi_card[card].shift_count) | txcount,
 456                         base);
 457                 residue = NO;
 458                 wrd = 0;
 459                 while (1) {
 460                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 461                                         - port->xmit_tail));
 462                         if (residue == YES) {
 463                                 residue = NO;
 464                                 if (cnt > 0) {
 465                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 466                                                                         << 8);
 467                                         port->xmit_tail = (port->xmit_tail + 1)
 468                                                 & (SERIAL_XMIT_SIZE - 1);
 469                                         port->xmit_cnt--;
 470                                         txcount--;
 471                                         cnt--;
 472                                         outw(wrd, base);
 473                                 } else {
 474                                         outw(wrd, base);
 475                                         break;
 476                                 }
 477                         }
 478                         if (cnt <= 0)
 479                                 break;
 480                         word_count = cnt >> 1;
 481                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 482                         port->xmit_tail = (port->xmit_tail
 483                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 484                         txcount -= (word_count << 1);
 485                         port->xmit_cnt -= (word_count << 1);
 486                         if (cnt & 0x0001) {
 487                                 residue = YES;
 488                                 wrd = port->port.xmit_buf[port->xmit_tail];
 489                                 port->xmit_tail = (port->xmit_tail + 1)
 490                                         & (SERIAL_XMIT_SIZE - 1);
 491                                 port->xmit_cnt--;
 492                                 txcount--;
 493                         }
 494                 }
 495
 496                 InterruptTheCard(base);
 497                 if (port->xmit_cnt <= 0)
 498                         port->status &= ~ISI_TXOK;
 499                 if (port->xmit_cnt <= WAKEUP_CHARS)
 500                         tty_wakeup(tty);
 501         }
 502
 503 put_unlock:
 504         tty_kref_put(tty);
 505 unlock:
 506         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 507         /*      schedule another tx for hopefully in about 10ms */
 508 sched_again:
 509         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 510 }
 511
 512 /*
 513  *      Main interrupt handler routine
 514  */
 515
 516 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 517 {
 518         struct isi_board *card = dev_id;
 519         struct isi_port *port;
 520         struct tty_struct *tty;
 521         unsigned long base;
 522         u16 header, word_count, count, channel;
 523         short byte_count;
 524         unsigned char *rp;
 525
 526         if (!card || !(card->status & FIRMWARE_LOADED))
 527                 return IRQ_NONE;
 528
 529         base = card->base;
 530
 531         /* did the card interrupt us? */
 532         if (!(inw(base + 0x0e) & 0x02))
 533                 return IRQ_NONE;
 534
 535         spin_lock(&card->card_lock);
 536
 537         /*
 538          * disable any interrupts from the PCI card and lower the
 539          * interrupt line
 540          */
 541         outw(0x8000, base+0x04);
 542         ClearInterrupt(base);
 543
 544         inw(base);              /* get the dummy word out */
 545         header = inw(base);
 546         channel = (header & 0x7800) >> card->shift_count;
 547         byte_count = header & 0xff;
 548
 549         if (channel + 1 > card->port_count) {
 550                 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
 551                         "%d(channel) > port_count.\n", base, channel+1);
 552                 outw(0x0000, base+0x04); /* enable interrupts */
 553                 spin_unlock(&card->card_lock);
 554                 return IRQ_HANDLED;
 555         }
 556         port = card->ports + channel;
 557         if (!(port->port.flags & ASYNC_INITIALIZED)) {
 558                 outw(0x0000, base+0x04); /* enable interrupts */
 559                 spin_unlock(&card->card_lock);
 560                 return IRQ_HANDLED;
 561         }
 562
 563         tty = tty_port_tty_get(&port->port);
 564         if (tty == NULL) {
 565                 word_count = byte_count >> 1;
 566                 while (byte_count > 1) {
 567                         inw(base);
 568                         byte_count -= 2;
 569                 }
 570                 if (byte_count & 0x01)
 571                         inw(base);
 572                 outw(0x0000, base+0x04); /* enable interrupts */
 573                 spin_unlock(&card->card_lock);
 574                 return IRQ_HANDLED;
 575         }
 576
 577         if (header & 0x8000) {          /* Status Packet */
 578                 header = inw(base);
 579                 switch (header & 0xff) {
 580                 case 0: /* Change in EIA signals */
 581                         if (port->port.flags & ASYNC_CHECK_CD) {
 582                                 if (port->status & ISI_DCD) {
 583                                         if (!(header & ISI_DCD)) {
 584                                         /* Carrier has been lost  */
 585                                                 pr_dbg("interrupt: DCD->low.\n"
 586                                                         );
 587                                                 port->status &= ~ISI_DCD;
 588                                                 tty_hangup(tty);
 589                                         }
 590                                 } else if (header & ISI_DCD) {
 591                                 /* Carrier has been detected */
 592                                         pr_dbg("interrupt: DCD->high.\n");
 593                                         port->status |= ISI_DCD;
 594                                         wake_up_interruptible(&port->port.open_wait);
 595                                 }
 596                         } else {
 597                                 if (header & ISI_DCD)
 598                                         port->status |= ISI_DCD;
 599                                 else
 600                                         port->status &= ~ISI_DCD;
 601                         }
 602
 603                         if (port->port.flags & ASYNC_CTS_FLOW) {
 604                                 if (tty->hw_stopped) {
 605                                         if (header & ISI_CTS) {
 606                                                 port->port.tty->hw_stopped = 0;
 607                                                 /* start tx ing */
 608                                                 port->status |= (ISI_TXOK
 609                                                         | ISI_CTS);
 610                                                 tty_wakeup(tty);
 611                                         }
 612                                 } else if (!(header & ISI_CTS)) {
 613                                         tty->hw_stopped = 1;
 614                                         /* stop tx ing */
 615                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 616                                 }
 617                         } else {
 618                                 if (header & ISI_CTS)
 619                                         port->status |= ISI_CTS;
 620                                 else
 621                                         port->status &= ~ISI_CTS;
 622                         }
 623
 624                         if (header & ISI_DSR)
 625                                 port->status |= ISI_DSR;
 626                         else
 627                                 port->status &= ~ISI_DSR;
 628
 629                         if (header & ISI_RI)
 630                                 port->status |= ISI_RI;
 631                         else
 632                                 port->status &= ~ISI_RI;
 633
 634                         break;
 635
 636                 case 1: /* Received Break !!! */
 637                         tty_insert_flip_char(tty, 0, TTY_BREAK);
 638                         if (port->port.flags & ASYNC_SAK)
 639                                 do_SAK(tty);
 640                         tty_flip_buffer_push(tty);
 641                         break;
 642
 643                 case 2: /* Statistics            */
 644                         pr_dbg("isicom_interrupt: stats!!!.\n");
 645                         break;
 646
 647                 default:
 648                         pr_dbg("Intr: Unknown code in status packet.\n");
 649                         break;
 650                 }
 651         } else {                                /* Data   Packet */
 652
 653                 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
 654                 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
 655                 word_count = count >> 1;
 656                 insw(base, rp, word_count);
 657                 byte_count -= (word_count << 1);
 658                 if (count & 0x0001) {
 659                         tty_insert_flip_char(tty,  inw(base) & 0xff,
 660                                 TTY_NORMAL);
 661                         byte_count -= 2;
 662                 }
 663                 if (byte_count > 0) {
 664                         pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
 665                                 "bytes...\n", base, channel + 1);
 666                 /* drain out unread xtra data */
 667                 while (byte_count > 0) {
 668                                 inw(base);
 669                                 byte_count -= 2;
 670                         }
 671                 }
 672                 tty_flip_buffer_push(tty);
 673         }
 674         outw(0x0000, base+0x04); /* enable interrupts */
 675         spin_unlock(&card->card_lock);
 676         tty_kref_put(tty);
 677
 678         return IRQ_HANDLED;
 679 }
 680
 681 static void isicom_config_port(struct tty_struct *tty)
 682 {
 683         struct isi_port *port = tty->driver_data;
 684         struct isi_board *card = port->card;
 685         unsigned long baud;
 686         unsigned long base = card->base;
 687         u16 channel_setup, channel = port->channel,
 688                 shift_count = card->shift_count;
 689         unsigned char flow_ctrl;
 690
 691         /* FIXME: Switch to new tty baud API */
 692         baud = C_BAUD(tty);
 693         if (baud & CBAUDEX) {
 694                 baud &= ~CBAUDEX;
 695
 696                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 697                  *  then the card is programmed for 57.6Kbps or 115Kbps
 698                  *  respectively.
 699                  */
 700
 701                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 702                 if (baud < 1 || baud > 4)
 703                         tty->termios->c_cflag &= ~CBAUDEX;
 704                 else
 705                         baud += 15;
 706         }
 707         if (baud == 15) {
 708
 709                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 710                  *  by the set_serial_info ioctl ... this is done by
 711                  *  the 'setserial' utility.
 712                  */
 713
 714                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 715                         baud++; /*  57.6 Kbps */
 716                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 717                         baud += 2; /*  115  Kbps */
 718                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 719                         baud += 3; /* 230 kbps*/
 720                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 721                         baud += 4; /* 460 kbps*/
 722         }
 723         if (linuxb_to_isib[baud] == -1) {
 724                 /* hang up */
 725                 drop_dtr(port);
 726                 return;
 727         } else
 728                 raise_dtr(port);
 729
 730         if (WaitTillCardIsFree(base) == 0) {
 731                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 732                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 733                 channel_setup = 0;
 734                 switch (C_CSIZE(tty)) {
 735                 case CS5:
 736                         channel_setup |= ISICOM_CS5;
 737                         break;
 738                 case CS6:
 739                         channel_setup |= ISICOM_CS6;
 740                         break;
 741                 case CS7:
 742                         channel_setup |= ISICOM_CS7;
 743                         break;
 744                 case CS8:
 745                         channel_setup |= ISICOM_CS8;
 746                         break;
 747                 }
 748
 749                 if (C_CSTOPB(tty))
 750                         channel_setup |= ISICOM_2SB;
 751                 if (C_PARENB(tty)) {
 752                         channel_setup |= ISICOM_EVPAR;
 753                         if (C_PARODD(tty))
 754                                 channel_setup |= ISICOM_ODPAR;
 755                 }
 756                 outw(channel_setup, base);
 757                 InterruptTheCard(base);
 758         }
 759         if (C_CLOCAL(tty))
 760                 port->port.flags &= ~ASYNC_CHECK_CD;
 761         else
 762                 port->port.flags |= ASYNC_CHECK_CD;
 763
 764         /* flow control settings ...*/
 765         flow_ctrl = 0;
 766         port->port.flags &= ~ASYNC_CTS_FLOW;
 767         if (C_CRTSCTS(tty)) {
 768                 port->port.flags |= ASYNC_CTS_FLOW;
 769                 flow_ctrl |= ISICOM_CTSRTS;
 770         }
 771         if (I_IXON(tty))
 772                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 773         if (I_IXOFF(tty))
 774                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 775
 776         if (WaitTillCardIsFree(base) == 0) {
 777                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 778                 outw(flow_ctrl << 8 | 0x05, base);
 779                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 780                 InterruptTheCard(base);
 781         }
 782
 783         /*      rx enabled -> enable port for rx on the card    */
 784         if (C_CREAD(tty)) {
 785                 card->port_status |= (1 << channel);
 786                 outw(card->port_status, base + 0x02);
 787         }
 788 }
 789
 790 /* open et all */
 791
 792 static inline void isicom_setup_board(struct isi_board *bp)
 793 {
 794         int channel;
 795         struct isi_port *port;
 796         unsigned long flags;
 797
 798         spin_lock_irqsave(&bp->card_lock, flags);
 799         if (bp->status & BOARD_ACTIVE) {
 800                 spin_unlock_irqrestore(&bp->card_lock, flags);
 801                 return;
 802         }
 803         port = bp->ports;
 804         bp->status |= BOARD_ACTIVE;
 805         for (channel = 0; channel < bp->port_count; channel++, port++)
 806                 drop_dtr_rts(port);
 807         bp->count++;
 808         spin_unlock_irqrestore(&bp->card_lock, flags);
 809 }
 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         if (line < 0 || line > PORT_COUNT-1)
 852                 return NULL;
 853         board = BOARD(line);
 854         card = &isi_card[board];
 855
 856         if (!(card->status & FIRMWARE_LOADED))
 857                 return NULL;
 858
 859         /*  open on a port greater than the port count for the card !!! */
 860         if (line > ((board * 16) + card->port_count - 1))
 861                 return NULL;
 862
 863         port = &isi_ports[line];
 864         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 865                 return NULL;
 866
 867         return &port->port;
 868 }
 869
 870 static int isicom_open(struct tty_struct *tty, struct file *filp)
 871 {
 872         struct isi_port *port;
 873         struct isi_board *card;
 874         struct tty_port *tport;
 875
 876         tport = isicom_find_port(tty);
 877         if (tport == NULL)
 878                 return -ENODEV;
 879         port = container_of(tport, struct isi_port, port);
 880         card = &isi_card[BOARD(tty->index)];
 881
 882         return tty_port_open(tport, tty, filp);
 883 }
 884
 885 /* close et all */
 886
 887 static inline void isicom_shutdown_board(struct isi_board *bp)
 888 {
 889         if (bp->status & BOARD_ACTIVE)
 890                 bp->status &= ~BOARD_ACTIVE;
 891 }
 892
 893 /* card->lock HAS to be held */
 894 static void isicom_shutdown_port(struct isi_port *port)
 895 {
 896         struct isi_board *card = port->card;
 897         struct tty_struct *tty;
 898
 899         tty = tty_port_tty_get(&port->port);
 900
 901         tty_port_free_xmit_buf(&port->port);
 902         if (--card->count < 0) {
 903                 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
 904                         card->base, card->count);
 905                 card->count = 0;
 906         }
 907
 908         /* last port was closed, shutdown that board too */
 909         if (tty && C_HUPCL(tty)) {
 910                 /* FIXME: this logic is bogus - it's the old logic that was
 911                    bogus before but it still wants fixing */
 912                 if (!card->count) {
 913                         if (card->status & BOARD_ACTIVE)
 914                                 card->status &= ~BOARD_ACTIVE;
 915                 }
 916         }
 917         tty_kref_put(tty);
 918 }
 919
 920 static void isicom_flush_buffer(struct tty_struct *tty)
 921 {
 922         struct isi_port *port = tty->driver_data;
 923         struct isi_board *card = port->card;
 924         unsigned long flags;
 925
 926         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 927                 return;
 928
 929         spin_lock_irqsave(&card->card_lock, flags);
 930         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 931         spin_unlock_irqrestore(&card->card_lock, flags);
 932
 933         tty_wakeup(tty);
 934 }
 935
 936 static void isicom_shutdown(struct tty_port *port)
 937 {
 938         struct isi_port *ip = container_of(port, struct isi_port, port);
 939         struct isi_board *card = ip->card;
 940         unsigned long flags;
 941
 942         /* indicate to the card that no more data can be received
 943            on this port */
 944         spin_lock_irqsave(&card->card_lock, flags);
 945         card->port_status &= ~(1 << ip->channel);
 946         outw(card->port_status, card->base + 0x02);
 947         isicom_shutdown_port(ip);
 948         spin_unlock_irqrestore(&card->card_lock, flags);
 949 }
 950
 951 static void isicom_close(struct tty_struct *tty, struct file *filp)
 952 {
 953         struct isi_port *ip = tty->driver_data;
 954         struct tty_port *port = &ip->port;
 955         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 956                 return;
 957         tty_port_close(port, tty, filp);
 958 }
 959
 960 /* write et all */
 961 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 962         int count)
 963 {
 964         struct isi_port *port = tty->driver_data;
 965         struct isi_board *card = port->card;
 966         unsigned long flags;
 967         int cnt, total = 0;
 968
 969         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 970                 return 0;
 971
 972         spin_lock_irqsave(&card->card_lock, flags);
 973
 974         while (1) {
 975                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 976                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 977                 if (cnt <= 0)
 978                         break;
 979
 980                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 981                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 982                         - 1);
 983                 port->xmit_cnt += cnt;
 984                 buf += cnt;
 985                 count -= cnt;
 986                 total += cnt;
 987         }
 988         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 989                 port->status |= ISI_TXOK;
 990         spin_unlock_irqrestore(&card->card_lock, flags);
 991         return total;
 992 }
 993
 994 /* put_char et all */
 995 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 996 {
 997         struct isi_port *port = tty->driver_data;
 998         struct isi_board *card = port->card;
 999         unsigned long flags;
1000
1001         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1002                 return 0;
1003
1004         spin_lock_irqsave(&card->card_lock, flags);
1005         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1006                 spin_unlock_irqrestore(&card->card_lock, flags);
1007                 return 0;
1008         }
1009
1010         port->port.xmit_buf[port->xmit_head++] = ch;
1011         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1012         port->xmit_cnt++;
1013         spin_unlock_irqrestore(&card->card_lock, flags);
1014         return 1;
1015 }
1016
1017 /* flush_chars et all */
1018 static void isicom_flush_chars(struct tty_struct *tty)
1019 {
1020         struct isi_port *port = tty->driver_data;
1021
1022         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1023                 return;
1024
1025         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1026                         !port->port.xmit_buf)
1027                 return;
1028
1029         /* this tells the transmitter to consider this port for
1030            data output to the card ... that's the best we can do. */
1031         port->status |= ISI_TXOK;
1032 }
1033
1034 /* write_room et all */
1035 static int isicom_write_room(struct tty_struct *tty)
1036 {
1037         struct isi_port *port = tty->driver_data;
1038         int free;
1039
1040         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1041                 return 0;
1042
1043         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1044         if (free < 0)
1045                 free = 0;
1046         return free;
1047 }
1048
1049 /* chars_in_buffer et all */
1050 static int isicom_chars_in_buffer(struct tty_struct *tty)
1051 {
1052         struct isi_port *port = tty->driver_data;
1053         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1054                 return 0;
1055         return port->xmit_cnt;
1056 }
1057
1058 /* ioctl et all */
1059 static int isicom_send_break(struct tty_struct *tty, int length)
1060 {
1061         struct isi_port *port = tty->driver_data;
1062         struct isi_board *card = port->card;
1063         unsigned long base = card->base;
1064
1065         if (length == -1)
1066                 return -EOPNOTSUPP;
1067
1068         if (!lock_card(card))
1069                 return -EINVAL;
1070
1071         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1072         outw((length & 0xff) << 8 | 0x00, base);
1073         outw((length & 0xff00), base);
1074         InterruptTheCard(base);
1075
1076         unlock_card(card);
1077         return 0;
1078 }
1079
1080 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1081 {
1082         struct isi_port *port = tty->driver_data;
1083         /* just send the port status */
1084         u16 status = port->status;
1085
1086         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1087                 return -ENODEV;
1088
1089         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1090                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1091                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1092                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1093                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1094                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1095 }
1096
1097 static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
1098         unsigned int set, unsigned int clear)
1099 {
1100         struct isi_port *port = tty->driver_data;
1101         unsigned long flags;
1102
1103         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1104                 return -ENODEV;
1105
1106         spin_lock_irqsave(&port->card->card_lock, flags);
1107         if (set & TIOCM_RTS)
1108                 raise_rts(port);
1109         if (set & TIOCM_DTR)
1110                 raise_dtr(port);
1111
1112         if (clear & TIOCM_RTS)
1113                 drop_rts(port);
1114         if (clear & TIOCM_DTR)
1115                 drop_dtr(port);
1116         spin_unlock_irqrestore(&port->card->card_lock, flags);
1117
1118         return 0;
1119 }
1120
1121 static int isicom_set_serial_info(struct tty_struct *tty,
1122                                         struct serial_struct __user *info)
1123 {
1124         struct isi_port *port = tty->driver_data;
1125         struct serial_struct newinfo;
1126         int reconfig_port;
1127
1128         if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1129                 return -EFAULT;
1130
1131         lock_kernel();
1132
1133         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1134                 (newinfo.flags & ASYNC_SPD_MASK));
1135
1136         if (!capable(CAP_SYS_ADMIN)) {
1137                 if ((newinfo.close_delay != port->port.close_delay) ||
1138                                 (newinfo.closing_wait != port->port.closing_wait) ||
1139                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1140                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1141                         unlock_kernel();
1142                         return -EPERM;
1143                 }
1144                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1145                                 (newinfo.flags & ASYNC_USR_MASK));
1146         } else {
1147                 port->port.close_delay = newinfo.close_delay;
1148                 port->port.closing_wait = newinfo.closing_wait;
1149                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1150                                 (newinfo.flags & ASYNC_FLAGS));
1151         }
1152         if (reconfig_port) {
1153                 unsigned long flags;
1154                 spin_lock_irqsave(&port->card->card_lock, flags);
1155                 isicom_config_port(tty);
1156                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1157         }
1158         unlock_kernel();
1159         return 0;
1160 }
1161
1162 static int isicom_get_serial_info(struct isi_port *port,
1163         struct serial_struct __user *info)
1164 {
1165         struct serial_struct out_info;
1166
1167         lock_kernel();
1168         memset(&out_info, 0, sizeof(out_info));
1169 /*      out_info.type = ? */
1170         out_info.line = port - isi_ports;
1171         out_info.port = port->card->base;
1172         out_info.irq = port->card->irq;
1173         out_info.flags = port->port.flags;
1174 /*      out_info.baud_base = ? */
1175         out_info.close_delay = port->port.close_delay;
1176         out_info.closing_wait = port->port.closing_wait;
1177         unlock_kernel();
1178         if (copy_to_user(info, &out_info, sizeof(out_info)))
1179                 return -EFAULT;
1180         return 0;
1181 }
1182
1183 static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1184         unsigned int cmd, unsigned long arg)
1185 {
1186         struct isi_port *port = tty->driver_data;
1187         void __user *argp = (void __user *)arg;
1188
1189         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1190                 return -ENODEV;
1191
1192         switch (cmd) {
1193         case TIOCGSERIAL:
1194                 return isicom_get_serial_info(port, argp);
1195
1196         case TIOCSSERIAL:
1197                 return isicom_set_serial_info(tty, argp);
1198
1199         default:
1200                 return -ENOIOCTLCMD;
1201         }
1202         return 0;
1203 }
1204
1205 /* set_termios et all */
1206 static void isicom_set_termios(struct tty_struct *tty,
1207         struct ktermios *old_termios)
1208 {
1209         struct isi_port *port = tty->driver_data;
1210         unsigned long flags;
1211
1212         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1213                 return;
1214
1215         if (tty->termios->c_cflag == old_termios->c_cflag &&
1216                         tty->termios->c_iflag == old_termios->c_iflag)
1217                 return;
1218
1219         spin_lock_irqsave(&port->card->card_lock, flags);
1220         isicom_config_port(tty);
1221         spin_unlock_irqrestore(&port->card->card_lock, flags);
1222
1223         if ((old_termios->c_cflag & CRTSCTS) &&
1224                         !(tty->termios->c_cflag & CRTSCTS)) {
1225                 tty->hw_stopped = 0;
1226                 isicom_start(tty);
1227         }
1228 }
1229
1230 /* throttle et all */
1231 static void isicom_throttle(struct tty_struct *tty)
1232 {
1233         struct isi_port *port = tty->driver_data;
1234         struct isi_board *card = port->card;
1235
1236         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1237                 return;
1238
1239         /* tell the card that this port cannot handle any more data for now */
1240         card->port_status &= ~(1 << port->channel);
1241         outw(card->port_status, card->base + 0x02);
1242 }
1243
1244 /* unthrottle et all */
1245 static void isicom_unthrottle(struct tty_struct *tty)
1246 {
1247         struct isi_port *port = tty->driver_data;
1248         struct isi_board *card = port->card;
1249
1250         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1251                 return;
1252
1253         /* tell the card that this port is ready to accept more data */
1254         card->port_status |= (1 << port->channel);
1255         outw(card->port_status, card->base + 0x02);
1256 }
1257
1258 /* stop et all */
1259 static void isicom_stop(struct tty_struct *tty)
1260 {
1261         struct isi_port *port = tty->driver_data;
1262
1263         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1264                 return;
1265
1266         /* this tells the transmitter not to consider this port for
1267            data output to the card. */
1268         port->status &= ~ISI_TXOK;
1269 }
1270
1271 /* start et all */
1272 static void isicom_start(struct tty_struct *tty)
1273 {
1274         struct isi_port *port = tty->driver_data;
1275
1276         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1277                 return;
1278
1279         /* this tells the transmitter to consider this port for
1280            data output to the card. */
1281         port->status |= ISI_TXOK;
1282 }
1283
1284 static void isicom_hangup(struct tty_struct *tty)
1285 {
1286         struct isi_port *port = tty->driver_data;
1287
1288         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1289                 return;
1290         tty_port_hangup(&port->port);
1291 }
1292
1293
1294 /*
1295  * Driver init and deinit functions
1296  */
1297
1298 static const struct tty_operations isicom_ops = {
1299         .open                   = isicom_open,
1300         .close                  = isicom_close,
1301         .write                  = isicom_write,
1302         .put_char               = isicom_put_char,
1303         .flush_chars            = isicom_flush_chars,
1304         .write_room             = isicom_write_room,
1305         .chars_in_buffer        = isicom_chars_in_buffer,
1306         .ioctl                  = isicom_ioctl,
1307         .set_termios            = isicom_set_termios,
1308         .throttle               = isicom_throttle,
1309         .unthrottle             = isicom_unthrottle,
1310         .stop                   = isicom_stop,
1311         .start                  = isicom_start,
1312         .hangup                 = isicom_hangup,
1313         .flush_buffer           = isicom_flush_buffer,
1314         .tiocmget               = isicom_tiocmget,
1315         .tiocmset               = isicom_tiocmset,
1316         .break_ctl              = isicom_send_break,
1317 };
1318
1319 static const struct tty_port_operations isicom_port_ops = {
1320         .carrier_raised         = isicom_carrier_raised,
1321         .dtr_rts                = isicom_dtr_rts,
1322         .activate               = isicom_activate,
1323         .shutdown               = isicom_shutdown,
1324 };
1325
1326 static int __devinit reset_card(struct pci_dev *pdev,
1327         const unsigned int card, unsigned int *signature)
1328 {
1329         struct isi_board *board = pci_get_drvdata(pdev);
1330         unsigned long base = board->base;
1331         unsigned int sig, portcount = 0;
1332         int retval = 0;
1333
1334         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1335                 base);
1336
1337         inw(base + 0x8);
1338
1339         msleep(10);
1340
1341         outw(0, base + 0x8); /* Reset */
1342
1343         msleep(1000);
1344
1345         sig = inw(base + 0x4) & 0xff;
1346
1347         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1348                         sig != 0xee) {
1349                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1350                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1351                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1352                 retval = -EIO;
1353                 goto end;
1354         }
1355
1356         msleep(10);
1357
1358         portcount = inw(base + 0x2);
1359         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1360                                 portcount != 8 && portcount != 16)) {
1361                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1362                         card + 1);
1363                 retval = -EIO;
1364                 goto end;
1365         }
1366
1367         switch (sig) {
1368         case 0xa5:
1369         case 0xbb:
1370         case 0xdd:
1371                 board->port_count = (portcount == 4) ? 4 : 8;
1372                 board->shift_count = 12;
1373                 break;
1374         case 0xcc:
1375         case 0xee:
1376                 board->port_count = 16;
1377                 board->shift_count = 11;
1378                 break;
1379         }
1380         dev_info(&pdev->dev, "-Done\n");
1381         *signature = sig;
1382
1383 end:
1384         return retval;
1385 }
1386
1387 static int __devinit load_firmware(struct pci_dev *pdev,
1388         const unsigned int index, const unsigned int signature)
1389 {
1390         struct isi_board *board = pci_get_drvdata(pdev);
1391         const struct firmware *fw;
1392         unsigned long base = board->base;
1393         unsigned int a;
1394         u16 word_count, status;
1395         int retval = -EIO;
1396         char *name;
1397         u8 *data;
1398
1399         struct stframe {
1400                 u16     addr;
1401                 u16     count;
1402                 u8      data[0];
1403         } *frame;
1404
1405         switch (signature) {
1406         case 0xa5:
1407                 name = "isi608.bin";
1408                 break;
1409         case 0xbb:
1410                 name = "isi608em.bin";
1411                 break;
1412         case 0xcc:
1413                 name = "isi616em.bin";
1414                 break;
1415         case 0xdd:
1416                 name = "isi4608.bin";
1417                 break;
1418         case 0xee:
1419                 name = "isi4616.bin";
1420                 break;
1421         default:
1422                 dev_err(&pdev->dev, "Unknown signature.\n");
1423                 goto end;
1424         }
1425
1426         retval = request_firmware(&fw, name, &pdev->dev);
1427         if (retval)
1428                 goto end;
1429
1430         retval = -EIO;
1431
1432         for (frame = (struct stframe *)fw->data;
1433                         frame < (struct stframe *)(fw->data + fw->size);
1434                         frame = (struct stframe *)((u8 *)(frame + 1) +
1435                                 frame->count)) {
1436                 if (WaitTillCardIsFree(base))
1437                         goto errrelfw;
1438
1439                 outw(0xf0, base);       /* start upload sequence */
1440                 outw(0x00, base);
1441                 outw(frame->addr, base); /* lsb of address */
1442
1443                 word_count = frame->count / 2 + frame->count % 2;
1444                 outw(word_count, base);
1445                 InterruptTheCard(base);
1446
1447                 udelay(100); /* 0x2f */
1448
1449                 if (WaitTillCardIsFree(base))
1450                         goto errrelfw;
1451
1452                 status = inw(base + 0x4);
1453                 if (status != 0) {
1454                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1455                                  "Address:0x%x\n"
1456                                  "Count:0x%x\n"
1457                                  "Status:0x%x\n",
1458                                  index + 1, frame->addr, frame->count, status);
1459                         goto errrelfw;
1460                 }
1461                 outsw(base, frame->data, word_count);
1462
1463                 InterruptTheCard(base);
1464
1465                 udelay(50); /* 0x0f */
1466
1467                 if (WaitTillCardIsFree(base))
1468                         goto errrelfw;
1469
1470                 status = inw(base + 0x4);
1471                 if (status != 0) {
1472                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1473                                 "Status:0x%x\n", index + 1, status);
1474                         goto errrelfw;
1475                 }
1476         }
1477
1478 /* XXX: should we test it by reading it back and comparing with original like
1479  * in load firmware package? */
1480         for (frame = (struct stframe *)fw->data;
1481                         frame < (struct stframe *)(fw->data + fw->size);
1482                         frame = (struct stframe *)((u8 *)(frame + 1) +
1483                                 frame->count)) {
1484                 if (WaitTillCardIsFree(base))
1485                         goto errrelfw;
1486
1487                 outw(0xf1, base); /* start download sequence */
1488                 outw(0x00, base);
1489                 outw(frame->addr, base); /* lsb of address */
1490
1491                 word_count = (frame->count >> 1) + frame->count % 2;
1492                 outw(word_count + 1, base);
1493                 InterruptTheCard(base);
1494
1495                 udelay(50); /* 0xf */
1496
1497                 if (WaitTillCardIsFree(base))
1498                         goto errrelfw;
1499
1500                 status = inw(base + 0x4);
1501                 if (status != 0) {
1502                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1503                                  "Address:0x%x\n"
1504                                  "Count:0x%x\n"
1505                                  "Status: 0x%x\n",
1506                                  index + 1, frame->addr, frame->count, status);
1507                         goto errrelfw;
1508                 }
1509
1510                 data = kmalloc(word_count * 2, GFP_KERNEL);
1511                 if (data == NULL) {
1512                         dev_err(&pdev->dev, "Card%d, firmware upload "
1513                                 "failed, not enough memory\n", index + 1);
1514                         goto errrelfw;
1515                 }
1516                 inw(base);
1517                 insw(base, data, word_count);
1518                 InterruptTheCard(base);
1519
1520                 for (a = 0; a < frame->count; a++)
1521                         if (data[a] != frame->data[a]) {
1522                                 kfree(data);
1523                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1524                                         "failed\n", index + 1);
1525                                 goto errrelfw;
1526                         }
1527                 kfree(data);
1528
1529                 udelay(50); /* 0xf */
1530
1531                 if (WaitTillCardIsFree(base))
1532                         goto errrelfw;
1533
1534                 status = inw(base + 0x4);
1535                 if (status != 0) {
1536                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1537                                 "Card Status:0x%x\n", index + 1, status);
1538                         goto errrelfw;
1539                 }
1540         }
1541
1542         /* xfer ctrl */
1543         if (WaitTillCardIsFree(base))
1544                 goto errrelfw;
1545
1546         outw(0xf2, base);
1547         outw(0x800, base);
1548         outw(0x0, base);
1549         outw(0x0, base);
1550         InterruptTheCard(base);
1551         outw(0x0, base + 0x4); /* for ISI4608 cards */
1552
1553         board->status |= FIRMWARE_LOADED;
1554         retval = 0;
1555
1556 errrelfw:
1557         release_firmware(fw);
1558 end:
1559         return retval;
1560 }
1561
1562 /*
1563  *      Insmod can set static symbols so keep these static
1564  */
1565 static unsigned int card_count;
1566
1567 static int __devinit isicom_probe(struct pci_dev *pdev,
1568         const struct pci_device_id *ent)
1569 {
1570         unsigned int uninitialized_var(signature), index;
1571         int retval = -EPERM;
1572         struct isi_board *board = NULL;
1573
1574         if (card_count >= BOARD_COUNT)
1575                 goto err;
1576
1577         retval = pci_enable_device(pdev);
1578         if (retval) {
1579                 dev_err(&pdev->dev, "failed to enable\n");
1580                 goto err;
1581         }
1582
1583         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1584
1585         /* allot the first empty slot in the array */
1586         for (index = 0; index < BOARD_COUNT; index++)
1587                 if (isi_card[index].base == 0) {
1588                         board = &isi_card[index];
1589                         break;
1590                 }
1591
1592         board->index = index;
1593         board->base = pci_resource_start(pdev, 3);
1594         board->irq = pdev->irq;
1595         card_count++;
1596
1597         pci_set_drvdata(pdev, board);
1598
1599         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1600         if (retval) {
1601                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1602                         "will be disabled.\n", board->base, board->base + 15,
1603                         index + 1);
1604                 retval = -EBUSY;
1605                 goto errdec;
1606         }
1607
1608         retval = request_irq(board->irq, isicom_interrupt,
1609                         IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1610         if (retval < 0) {
1611                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1612                         "Card%d will be disabled.\n", board->irq, index + 1);
1613                 goto errunrr;
1614         }
1615
1616         retval = reset_card(pdev, index, &signature);
1617         if (retval < 0)
1618                 goto errunri;
1619
1620         retval = load_firmware(pdev, index, signature);
1621         if (retval < 0)
1622                 goto errunri;
1623
1624         for (index = 0; index < board->port_count; index++)
1625                 tty_register_device(isicom_normal, board->index * 16 + index,
1626                                 &pdev->dev);
1627
1628         return 0;
1629
1630 errunri:
1631         free_irq(board->irq, board);
1632 errunrr:
1633         pci_release_region(pdev, 3);
1634 errdec:
1635         board->base = 0;
1636         card_count--;
1637         pci_disable_device(pdev);
1638 err:
1639         return retval;
1640 }
1641
1642 static void __devexit isicom_remove(struct pci_dev *pdev)
1643 {
1644         struct isi_board *board = pci_get_drvdata(pdev);
1645         unsigned int i;
1646
1647         for (i = 0; i < board->port_count; i++)
1648                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1649
1650         free_irq(board->irq, board);
1651         pci_release_region(pdev, 3);
1652         board->base = 0;
1653         card_count--;
1654         pci_disable_device(pdev);
1655 }
1656
1657 static int __init isicom_init(void)
1658 {
1659         int retval, idx, channel;
1660         struct isi_port *port;
1661
1662         for (idx = 0; idx < BOARD_COUNT; idx++) {
1663                 port = &isi_ports[idx * 16];
1664                 isi_card[idx].ports = port;
1665                 spin_lock_init(&isi_card[idx].card_lock);
1666                 for (channel = 0; channel < 16; channel++, port++) {
1667                         tty_port_init(&port->port);
1668                         port->port.ops = &isicom_port_ops;
1669                         port->magic = ISICOM_MAGIC;
1670                         port->card = &isi_card[idx];
1671                         port->channel = channel;
1672                         port->port.close_delay = 50 * HZ/100;
1673                         port->port.closing_wait = 3000 * HZ/100;
1674                         port->status = 0;
1675                         /*  . . .  */
1676                 }
1677                 isi_card[idx].base = 0;
1678                 isi_card[idx].irq = 0;
1679         }
1680
1681         /* tty driver structure initialization */
1682         isicom_normal = alloc_tty_driver(PORT_COUNT);
1683         if (!isicom_normal) {
1684                 retval = -ENOMEM;
1685                 goto error;
1686         }
1687
1688         isicom_normal->owner                    = THIS_MODULE;
1689         isicom_normal->name                     = "ttyM";
1690         isicom_normal->major                    = ISICOM_NMAJOR;
1691         isicom_normal->minor_start              = 0;
1692         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1693         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1694         isicom_normal->init_termios             = tty_std_termios;
1695         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1696                 CLOCAL;
1697         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1698                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1699         tty_set_operations(isicom_normal, &isicom_ops);
1700
1701         retval = tty_register_driver(isicom_normal);
1702         if (retval) {
1703                 pr_dbg("Couldn't register the dialin driver\n");
1704                 goto err_puttty;
1705         }
1706
1707         retval = pci_register_driver(&isicom_driver);
1708         if (retval < 0) {
1709                 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1710                 goto err_unrtty;
1711         }
1712
1713         mod_timer(&tx, jiffies + 1);
1714
1715         return 0;
1716 err_unrtty:
1717         tty_unregister_driver(isicom_normal);
1718 err_puttty:
1719         put_tty_driver(isicom_normal);
1720 error:
1721         return retval;
1722 }
1723
1724 static void __exit isicom_exit(void)
1725 {
1726         del_timer_sync(&tx);
1727
1728         pci_unregister_driver(&isicom_driver);
1729         tty_unregister_driver(isicom_normal);
1730         put_tty_driver(isicom_normal);
1731 }
1732
1733 module_init(isicom_init);
1734 module_exit(isicom_exit);
1735
1736 MODULE_AUTHOR("MultiTech");
1737 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1738 MODULE_LICENSE("GPL");