git.oblomov.eu Git - linux-2.6/blob - drivers/char/epca.c

   1 /*
   2
   3
   4         Copyright (C) 1996  Digi International.
   5
   6         For technical support please email digiLinux@dgii.com or
   7         call Digi tech support at (612) 912-3456
   8
   9         ** This driver is no longer supported by Digi **
  10
  11         Much of this design and code came from epca.c which was
  12         copyright (C) 1994, 1995 Troy De Jongh, and subsquently
  13         modified by David Nugent, Christoph Lameter, Mike McLagan.
  14
  15         This program is free software; you can redistribute it and/or modify
  16         it under the terms of the GNU General Public License as published by
  17         the Free Software Foundation; either version 2 of the License, or
  18         (at your option) any later version.
  19
  20         This program is distributed in the hope that it will be useful,
  21         but WITHOUT ANY WARRANTY; without even the implied warranty of
  22         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23         GNU General Public License for more details.
  24
  25         You should have received a copy of the GNU General Public License
  26         along with this program; if not, write to the Free Software
  27         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28
  29 --------------------------------------------------------------------------- */
  30 /* See README.epca for change history --DAT*/
  31
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/init.h>
  37 #include <linux/serial.h>
  38 #include <linux/delay.h>
  39 #include <linux/ctype.h>
  40 #include <linux/tty.h>
  41 #include <linux/tty_flip.h>
  42 #include <linux/slab.h>
  43 #include <linux/ioport.h>
  44 #include <linux/interrupt.h>
  45 #include <asm/uaccess.h>
  46 #include <asm/io.h>
  47 #include <linux/spinlock.h>
  48 #include <linux/pci.h>
  49 #include "digiPCI.h"
  50
  51
  52 #include "digi1.h"
  53 #include "digiFep1.h"
  54 #include "epca.h"
  55 #include "epcaconfig.h"
  56
  57 /* ---------------------- Begin defines ------------------------ */
  58
  59 #define VERSION            "1.3.0.1-LK2.6"
  60
  61 /* This major needs to be submitted to Linux to join the majors list */
  62
  63 #define DIGIINFOMAJOR       35  /* For Digi specific ioctl */
  64
  65
  66 #define MAXCARDS 7
  67 #define epcaassert(x, msg)  if (!(x)) epca_error(__LINE__, msg)
  68
  69 #define PFX "epca: "
  70
  71 /* ----------------- Begin global definitions ------------------- */
  72
  73 static int nbdevs, num_cards, liloconfig;
  74 static int digi_poller_inhibited = 1 ;
  75
  76 static int setup_error_code;
  77 static int invalid_lilo_config;
  78
  79 /* The ISA boards do window flipping into the same spaces so its only sane
  80    with a single lock. It's still pretty efficient */
  81
  82 static DEFINE_SPINLOCK(epca_lock);
  83
  84 /* -----------------------------------------------------------------------
  85         MAXBOARDS is typically 12, but ISA and EISA cards are restricted to
  86         7 below.
  87 --------------------------------------------------------------------------*/
  88 static struct board_info boards[MAXBOARDS];
  89
  90
  91 /* ------------- Begin structures used for driver registeration ---------- */
  92
  93 static struct tty_driver *pc_driver;
  94 static struct tty_driver *pc_info;
  95
  96 /* ------------------ Begin Digi specific structures -------------------- */
  97
  98 /* ------------------------------------------------------------------------
  99         digi_channels represents an array of structures that keep track of
 100         each channel of the Digi product.  Information such as transmit and
 101         receive pointers, termio data, and signal definitions (DTR, CTS, etc ...)
 102         are stored here.  This structure is NOT used to overlay the cards
 103         physical channel structure.
 104 -------------------------------------------------------------------------- */
 105
 106 static struct channel digi_channels[MAX_ALLOC];
 107
 108 /* ------------------------------------------------------------------------
 109         card_ptr is an array used to hold the address of the
 110         first channel structure of each card.  This array will hold
 111         the addresses of various channels located in digi_channels.
 112 -------------------------------------------------------------------------- */
 113 static struct channel *card_ptr[MAXCARDS];
 114
 115 static struct timer_list epca_timer;
 116
 117 /* ---------------------- Begin function prototypes --------------------- */
 118
 119 /* ----------------------------------------------------------------------
 120         Begin generic memory functions.  These functions will be alias
 121         (point at) more specific functions dependent on the board being
 122         configured.
 123 ----------------------------------------------------------------------- */
 124
 125 static void memwinon(struct board_info *b, unsigned int win);
 126 static void memwinoff(struct board_info *b, unsigned int win);
 127 static void globalwinon(struct channel *ch);
 128 static void rxwinon(struct channel *ch);
 129 static void txwinon(struct channel *ch);
 130 static void memoff(struct channel *ch);
 131 static void assertgwinon(struct channel *ch);
 132 static void assertmemoff(struct channel *ch);
 133
 134 /* ---- Begin more 'specific' memory functions for cx_like products --- */
 135
 136 static void pcxem_memwinon(struct board_info *b, unsigned int win);
 137 static void pcxem_memwinoff(struct board_info *b, unsigned int win);
 138 static void pcxem_globalwinon(struct channel *ch);
 139 static void pcxem_rxwinon(struct channel *ch);
 140 static void pcxem_txwinon(struct channel *ch);
 141 static void pcxem_memoff(struct channel *ch);
 142
 143 /* ------ Begin more 'specific' memory functions for the pcxe ------- */
 144
 145 static void pcxe_memwinon(struct board_info *b, unsigned int win);
 146 static void pcxe_memwinoff(struct board_info *b, unsigned int win);
 147 static void pcxe_globalwinon(struct channel *ch);
 148 static void pcxe_rxwinon(struct channel *ch);
 149 static void pcxe_txwinon(struct channel *ch);
 150 static void pcxe_memoff(struct channel *ch);
 151
 152 /* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */
 153 /* Note : pc64xe and pcxi share the same windowing routines */
 154
 155 static void pcxi_memwinon(struct board_info *b, unsigned int win);
 156 static void pcxi_memwinoff(struct board_info *b, unsigned int win);
 157 static void pcxi_globalwinon(struct channel *ch);
 158 static void pcxi_rxwinon(struct channel *ch);
 159 static void pcxi_txwinon(struct channel *ch);
 160 static void pcxi_memoff(struct channel *ch);
 161
 162 /* - Begin 'specific' do nothing memory functions needed for some cards - */
 163
 164 static void dummy_memwinon(struct board_info *b, unsigned int win);
 165 static void dummy_memwinoff(struct board_info *b, unsigned int win);
 166 static void dummy_globalwinon(struct channel *ch);
 167 static void dummy_rxwinon(struct channel *ch);
 168 static void dummy_txwinon(struct channel *ch);
 169 static void dummy_memoff(struct channel *ch);
 170 static void dummy_assertgwinon(struct channel *ch);
 171 static void dummy_assertmemoff(struct channel *ch);
 172
 173 /* ------------------- Begin declare functions ----------------------- */
 174
 175 static struct channel *verifyChannel(struct tty_struct *);
 176 static void pc_sched_event(struct channel *, int);
 177 static void epca_error(int, char *);
 178 static void pc_close(struct tty_struct *, struct file *);
 179 static void shutdown(struct channel *);
 180 static void pc_hangup(struct tty_struct *);
 181 static void pc_put_char(struct tty_struct *, unsigned char);
 182 static int pc_write_room(struct tty_struct *);
 183 static int pc_chars_in_buffer(struct tty_struct *);
 184 static void pc_flush_buffer(struct tty_struct *);
 185 static void pc_flush_chars(struct tty_struct *);
 186 static int block_til_ready(struct tty_struct *, struct file *,
 187                            struct channel *);
 188 static int pc_open(struct tty_struct *, struct file *);
 189 static void post_fep_init(unsigned int crd);
 190 static void epcapoll(unsigned long);
 191 static void doevent(int);
 192 static void fepcmd(struct channel *, int, int, int, int, int);
 193 static unsigned termios2digi_h(struct channel *ch, unsigned);
 194 static unsigned termios2digi_i(struct channel *ch, unsigned);
 195 static unsigned termios2digi_c(struct channel *ch, unsigned);
 196 static void epcaparam(struct tty_struct *, struct channel *);
 197 static void receive_data(struct channel *);
 198 static int pc_ioctl(struct tty_struct *, struct file *,
 199                     unsigned int, unsigned long);
 200 static int info_ioctl(struct tty_struct *, struct file *,
 201                     unsigned int, unsigned long);
 202 static void pc_set_termios(struct tty_struct *, struct termios *);
 203 static void do_softint(void *);
 204 static void pc_stop(struct tty_struct *);
 205 static void pc_start(struct tty_struct *);
 206 static void pc_throttle(struct tty_struct * tty);
 207 static void pc_unthrottle(struct tty_struct *tty);
 208 static void digi_send_break(struct channel *ch, int msec);
 209 static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
 210 void epca_setup(char *, int *);
 211
 212 static int get_termio(struct tty_struct *, struct termio __user *);
 213 static int pc_write(struct tty_struct *, const unsigned char *, int);
 214 static int pc_init(void);
 215 static int init_PCI(void);
 216
 217
 218 /* ------------------------------------------------------------------
 219         Table of functions for each board to handle memory.  Mantaining
 220         parallelism is a *very* good idea here.  The idea is for the
 221         runtime code to blindly call these functions, not knowing/caring
 222         about the underlying hardware.  This stuff should contain no
 223         conditionals; if more functionality is needed a different entry
 224         should be established.  These calls are the interface calls and
 225         are the only functions that should be accessed.  Anyone caught
 226         making direct calls deserves what they get.
 227 -------------------------------------------------------------------- */
 228
 229 static void memwinon(struct board_info *b, unsigned int win)
 230 {
 231         (b->memwinon)(b, win);
 232 }
 233
 234 static void memwinoff(struct board_info *b, unsigned int win)
 235 {
 236         (b->memwinoff)(b, win);
 237 }
 238
 239 static void globalwinon(struct channel *ch)
 240 {
 241         (ch->board->globalwinon)(ch);
 242 }
 243
 244 static void rxwinon(struct channel *ch)
 245 {
 246         (ch->board->rxwinon)(ch);
 247 }
 248
 249 static void txwinon(struct channel *ch)
 250 {
 251         (ch->board->txwinon)(ch);
 252 }
 253
 254 static void memoff(struct channel *ch)
 255 {
 256         (ch->board->memoff)(ch);
 257 }
 258 static void assertgwinon(struct channel *ch)
 259 {
 260         (ch->board->assertgwinon)(ch);
 261 }
 262
 263 static void assertmemoff(struct channel *ch)
 264 {
 265         (ch->board->assertmemoff)(ch);
 266 }
 267
 268 /* ---------------------------------------------------------
 269         PCXEM windowing is the same as that used in the PCXR
 270         and CX series cards.
 271 ------------------------------------------------------------ */
 272
 273 static void pcxem_memwinon(struct board_info *b, unsigned int win)
 274 {
 275         outb_p(FEPWIN|win, b->port + 1);
 276 }
 277
 278 static void pcxem_memwinoff(struct board_info *b, unsigned int win)
 279 {
 280         outb_p(0, b->port + 1);
 281 }
 282
 283 static void pcxem_globalwinon(struct channel *ch)
 284 {
 285         outb_p( FEPWIN, (int)ch->board->port + 1);
 286 }
 287
 288 static void pcxem_rxwinon(struct channel *ch)
 289 {
 290         outb_p(ch->rxwin, (int)ch->board->port + 1);
 291 }
 292
 293 static void pcxem_txwinon(struct channel *ch)
 294 {
 295         outb_p(ch->txwin, (int)ch->board->port + 1);
 296 }
 297
 298 static void pcxem_memoff(struct channel *ch)
 299 {
 300         outb_p(0, (int)ch->board->port + 1);
 301 }
 302
 303 /* ----------------- Begin pcxe memory window stuff ------------------ */
 304
 305 static void pcxe_memwinon(struct board_info *b, unsigned int win)
 306 {
 307                outb_p(FEPWIN | win, b->port + 1);
 308 }
 309
 310 static void pcxe_memwinoff(struct board_info *b, unsigned int win)
 311 {
 312         outb_p(inb(b->port) & ~FEPMEM,
 313                    b->port + 1);
 314         outb_p(0, b->port + 1);
 315 }
 316
 317 static void pcxe_globalwinon(struct channel *ch)
 318 {
 319         outb_p( FEPWIN, (int)ch->board->port + 1);
 320 }
 321
 322 static void pcxe_rxwinon(struct channel *ch)
 323 {
 324                 outb_p(ch->rxwin, (int)ch->board->port + 1);
 325 }
 326
 327 static void pcxe_txwinon(struct channel *ch)
 328 {
 329                 outb_p(ch->txwin, (int)ch->board->port + 1);
 330 }
 331
 332 static void pcxe_memoff(struct channel *ch)
 333 {
 334         outb_p(0, (int)ch->board->port);
 335         outb_p(0, (int)ch->board->port + 1);
 336 }
 337
 338 /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
 339
 340 static void pcxi_memwinon(struct board_info *b, unsigned int win)
 341 {
 342                outb_p(inb(b->port) | FEPMEM, b->port);
 343 }
 344
 345 static void pcxi_memwinoff(struct board_info *b, unsigned int win)
 346 {
 347         outb_p(inb(b->port) & ~FEPMEM, b->port);
 348 }
 349
 350 static void pcxi_globalwinon(struct channel *ch)
 351 {
 352         outb_p(FEPMEM, ch->board->port);
 353 }
 354
 355 static void pcxi_rxwinon(struct channel *ch)
 356 {
 357                 outb_p(FEPMEM, ch->board->port);
 358 }
 359
 360 static void pcxi_txwinon(struct channel *ch)
 361 {
 362                 outb_p(FEPMEM, ch->board->port);
 363 }
 364
 365 static void pcxi_memoff(struct channel *ch)
 366 {
 367         outb_p(0, ch->board->port);
 368 }
 369
 370 static void pcxi_assertgwinon(struct channel *ch)
 371 {
 372         epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off");
 373 }
 374
 375 static void pcxi_assertmemoff(struct channel *ch)
 376 {
 377         epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on");
 378 }
 379
 380
 381 /* ----------------------------------------------------------------------
 382         Not all of the cards need specific memory windowing routines.  Some
 383         cards (Such as PCI) needs no windowing routines at all.  We provide
 384         these do nothing routines so that the same code base can be used.
 385         The driver will ALWAYS call a windowing routine if it thinks it needs
 386         to; regardless of the card.  However, dependent on the card the routine
 387         may or may not do anything.
 388 ---------------------------------------------------------------------------*/
 389
 390 static void dummy_memwinon(struct board_info *b, unsigned int win)
 391 {
 392 }
 393
 394 static void dummy_memwinoff(struct board_info *b, unsigned int win)
 395 {
 396 }
 397
 398 static void dummy_globalwinon(struct channel *ch)
 399 {
 400 }
 401
 402 static void dummy_rxwinon(struct channel *ch)
 403 {
 404 }
 405
 406 static void dummy_txwinon(struct channel *ch)
 407 {
 408 }
 409
 410 static void dummy_memoff(struct channel *ch)
 411 {
 412 }
 413
 414 static void dummy_assertgwinon(struct channel *ch)
 415 {
 416 }
 417
 418 static void dummy_assertmemoff(struct channel *ch)
 419 {
 420 }
 421
 422 /* ----------------- Begin verifyChannel function ----------------------- */
 423 static struct channel *verifyChannel(struct tty_struct *tty)
 424 { /* Begin verifyChannel */
 425         /* --------------------------------------------------------------------
 426                 This routine basically provides a sanity check.  It insures that
 427                 the channel returned is within the proper range of addresses as
 428                 well as properly initialized.  If some bogus info gets passed in
 429                 through tty->driver_data this should catch it.
 430                 --------------------------------------------------------------------- */
 431         if (tty) {
 432                 struct channel *ch = (struct channel *)tty->driver_data;
 433                 if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) {
 434                         if (ch->magic == EPCA_MAGIC)
 435                                 return ch;
 436                 }
 437         }
 438         return NULL;
 439
 440 } /* End verifyChannel */
 441
 442 /* ------------------ Begin pc_sched_event ------------------------- */
 443
 444 static void pc_sched_event(struct channel *ch, int event)
 445 {
 446         /* ----------------------------------------------------------------------
 447                 We call this to schedule interrupt processing on some event.  The
 448                 kernel sees our request and calls the related routine in OUR driver.
 449         -------------------------------------------------------------------------*/
 450         ch->event |= 1 << event;
 451         schedule_work(&ch->tqueue);
 452 } /* End pc_sched_event */
 453
 454 /* ------------------ Begin epca_error ------------------------- */
 455
 456 static void epca_error(int line, char *msg)
 457 {
 458         printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg);
 459 }
 460
 461 /* ------------------ Begin pc_close ------------------------- */
 462 static void pc_close(struct tty_struct * tty, struct file * filp)
 463 {
 464         struct channel *ch;
 465         unsigned long flags;
 466         /* ---------------------------------------------------------
 467                 verifyChannel returns the channel from the tty struct
 468                 if it is valid.  This serves as a sanity check.
 469         ------------------------------------------------------------- */
 470         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if ch != NULL */
 471                 spin_lock_irqsave(&epca_lock, flags);
 472                 if (tty_hung_up_p(filp)) {
 473                         spin_unlock_irqrestore(&epca_lock, flags);
 474                         return;
 475                 }
 476                 /* Check to see if the channel is open more than once */
 477                 if (ch->count-- > 1)  {
 478                         /* Begin channel is open more than once */
 479                         /* -------------------------------------------------------------
 480                                 Return without doing anything.  Someone might still be using
 481                                 the channel.
 482                         ---------------------------------------------------------------- */
 483                         spin_unlock_irqrestore(&epca_lock, flags);
 484                         return;
 485                 } /* End channel is open more than once */
 486
 487                 /* Port open only once go ahead with shutdown & reset */
 488                 BUG_ON(ch->count < 0);
 489
 490                 /* ---------------------------------------------------------------
 491                         Let the rest of the driver know the channel is being closed.
 492                         This becomes important if an open is attempted before close
 493                         is finished.
 494                 ------------------------------------------------------------------ */
 495                 ch->asyncflags |= ASYNC_CLOSING;
 496                 tty->closing = 1;
 497
 498                 spin_unlock_irqrestore(&epca_lock, flags);
 499
 500                 if (ch->asyncflags & ASYNC_INITIALIZED)  {
 501                         /* Setup an event to indicate when the transmit buffer empties */
 502                         setup_empty_event(tty, ch);
 503                         tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
 504                 }
 505                 if (tty->driver->flush_buffer)
 506                         tty->driver->flush_buffer(tty);
 507
 508                 tty_ldisc_flush(tty);
 509                 shutdown(ch);
 510
 511                 spin_lock_irqsave(&epca_lock, flags);
 512                 tty->closing = 0;
 513                 ch->event = 0;
 514                 ch->tty = NULL;
 515                 spin_unlock_irqrestore(&epca_lock, flags);
 516
 517                 if (ch->blocked_open)  { /* Begin if blocked_open */
 518                         if (ch->close_delay)
 519                                 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
 520                         wake_up_interruptible(&ch->open_wait);
 521                 } /* End if blocked_open */
 522                 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
 523                                       ASYNC_CLOSING);
 524                 wake_up_interruptible(&ch->close_wait);
 525         } /* End if ch != NULL */
 526 } /* End pc_close */
 527
 528 /* ------------------ Begin shutdown  ------------------------- */
 529
 530 static void shutdown(struct channel *ch)
 531 { /* Begin shutdown */
 532
 533         unsigned long flags;
 534         struct tty_struct *tty;
 535         struct board_chan __iomem *bc;
 536
 537         if (!(ch->asyncflags & ASYNC_INITIALIZED))
 538                 return;
 539
 540         spin_lock_irqsave(&epca_lock, flags);
 541
 542         globalwinon(ch);
 543         bc = ch->brdchan;
 544
 545         /* ------------------------------------------------------------------
 546                 In order for an event to be generated on the receipt of data the
 547                 idata flag must be set. Since we are shutting down, this is not
 548                 necessary clear this flag.
 549         --------------------------------------------------------------------- */
 550
 551         if (bc)
 552                 writeb(0, &bc->idata);
 553         tty = ch->tty;
 554
 555         /* ----------------------------------------------------------------
 556            If we're a modem control device and HUPCL is on, drop RTS & DTR.
 557         ------------------------------------------------------------------ */
 558
 559         if (tty->termios->c_cflag & HUPCL)  {
 560                 ch->omodem &= ~(ch->m_rts | ch->m_dtr);
 561                 fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1);
 562         }
 563         memoff(ch);
 564
 565         /* ------------------------------------------------------------------
 566                 The channel has officialy been closed.  The next time it is opened
 567                 it will have to reinitialized.  Set a flag to indicate this.
 568         ---------------------------------------------------------------------- */
 569
 570         /* Prevent future Digi programmed interrupts from coming active */
 571
 572         ch->asyncflags &= ~ASYNC_INITIALIZED;
 573         spin_unlock_irqrestore(&epca_lock, flags);
 574
 575 } /* End shutdown */
 576
 577 /* ------------------ Begin pc_hangup  ------------------------- */
 578
 579 static void pc_hangup(struct tty_struct *tty)
 580 { /* Begin pc_hangup */
 581         struct channel *ch;
 582
 583         /* ---------------------------------------------------------
 584                 verifyChannel returns the channel from the tty struct
 585                 if it is valid.  This serves as a sanity check.
 586         ------------------------------------------------------------- */
 587
 588         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if ch != NULL */
 589                 unsigned long flags;
 590
 591                 if (tty->driver->flush_buffer)
 592                         tty->driver->flush_buffer(tty);
 593                 tty_ldisc_flush(tty);
 594                 shutdown(ch);
 595
 596                 spin_lock_irqsave(&epca_lock, flags);
 597                 ch->tty   = NULL;
 598                 ch->event = 0;
 599                 ch->count = 0;
 600                 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
 601                 spin_unlock_irqrestore(&epca_lock, flags);
 602                 wake_up_interruptible(&ch->open_wait);
 603         } /* End if ch != NULL */
 604
 605 } /* End pc_hangup */
 606
 607 /* ------------------ Begin pc_write  ------------------------- */
 608
 609 static int pc_write(struct tty_struct * tty,
 610                     const unsigned char *buf, int bytesAvailable)
 611 { /* Begin pc_write */
 612         unsigned int head, tail;
 613         int dataLen;
 614         int size;
 615         int amountCopied;
 616         struct channel *ch;
 617         unsigned long flags;
 618         int remain;
 619         struct board_chan __iomem *bc;
 620
 621         /* ----------------------------------------------------------------
 622                 pc_write is primarily called directly by the kernel routine
 623                 tty_write (Though it can also be called by put_char) found in
 624                 tty_io.c.  pc_write is passed a line discipline buffer where
 625                 the data to be written out is stored.  The line discipline
 626                 implementation itself is done at the kernel level and is not
 627                 brought into the driver.
 628         ------------------------------------------------------------------- */
 629
 630         /* ---------------------------------------------------------
 631                 verifyChannel returns the channel from the tty struct
 632                 if it is valid.  This serves as a sanity check.
 633         ------------------------------------------------------------- */
 634
 635         if ((ch = verifyChannel(tty)) == NULL)
 636                 return 0;
 637
 638         /* Make a pointer to the channel data structure found on the board. */
 639
 640         bc   = ch->brdchan;
 641         size = ch->txbufsize;
 642         amountCopied = 0;
 643
 644         spin_lock_irqsave(&epca_lock, flags);
 645         globalwinon(ch);
 646
 647         head = readw(&bc->tin) & (size - 1);
 648         tail = readw(&bc->tout);
 649
 650         if (tail != readw(&bc->tout))
 651                 tail = readw(&bc->tout);
 652         tail &= (size - 1);
 653
 654         /*      If head >= tail, head has not wrapped around. */
 655         if (head >= tail)  { /* Begin head has not wrapped */
 656                 /* ---------------------------------------------------------------
 657                         remain (much like dataLen above) represents the total amount of
 658                         space available on the card for data.  Here dataLen represents
 659                         the space existing between the head pointer and the end of
 660                         buffer.  This is important because a memcpy cannot be told to
 661                         automatically wrap around when it hits the buffer end.
 662                 ------------------------------------------------------------------ */
 663                 dataLen = size - head;
 664                 remain = size - (head - tail) - 1;
 665         } else { /* Begin head has wrapped around */
 666
 667                 remain = tail - head - 1;
 668                 dataLen = remain;
 669
 670         } /* End head has wrapped around */
 671         /* -------------------------------------------------------------------
 672                         Check the space on the card.  If we have more data than
 673                         space; reduce the amount of data to fit the space.
 674         ---------------------------------------------------------------------- */
 675         bytesAvailable = min(remain, bytesAvailable);
 676         txwinon(ch);
 677         while (bytesAvailable > 0)
 678         { /* Begin while there is data to copy onto card */
 679
 680                 /* -----------------------------------------------------------------
 681                         If head is not wrapped, the below will make sure the first
 682                         data copy fills to the end of card buffer.
 683                 ------------------------------------------------------------------- */
 684
 685                 dataLen = min(bytesAvailable, dataLen);
 686                 memcpy_toio(ch->txptr + head, buf, dataLen);
 687                 buf += dataLen;
 688                 head += dataLen;
 689                 amountCopied += dataLen;
 690                 bytesAvailable -= dataLen;
 691
 692                 if (head >= size) {
 693                         head = 0;
 694                         dataLen = tail;
 695                 }
 696         } /* End while there is data to copy onto card */
 697         ch->statusflags |= TXBUSY;
 698         globalwinon(ch);
 699         writew(head, &bc->tin);
 700
 701         if ((ch->statusflags & LOWWAIT) == 0)  {
 702                 ch->statusflags |= LOWWAIT;
 703                 writeb(1, &bc->ilow);
 704         }
 705         memoff(ch);
 706         spin_unlock_irqrestore(&epca_lock, flags);
 707         return(amountCopied);
 708
 709 } /* End pc_write */
 710
 711 /* ------------------ Begin pc_put_char  ------------------------- */
 712
 713 static void pc_put_char(struct tty_struct *tty, unsigned char c)
 714 { /* Begin pc_put_char */
 715         pc_write(tty, &c, 1);
 716 } /* End pc_put_char */
 717
 718 /* ------------------ Begin pc_write_room  ------------------------- */
 719
 720 static int pc_write_room(struct tty_struct *tty)
 721 { /* Begin pc_write_room */
 722
 723         int remain;
 724         struct channel *ch;
 725         unsigned long flags;
 726         unsigned int head, tail;
 727         struct board_chan __iomem *bc;
 728
 729         remain = 0;
 730
 731         /* ---------------------------------------------------------
 732                 verifyChannel returns the channel from the tty struct
 733                 if it is valid.  This serves as a sanity check.
 734         ------------------------------------------------------------- */
 735
 736         if ((ch = verifyChannel(tty)) != NULL)  {
 737                 spin_lock_irqsave(&epca_lock, flags);
 738                 globalwinon(ch);
 739
 740                 bc   = ch->brdchan;
 741                 head = readw(&bc->tin) & (ch->txbufsize - 1);
 742                 tail = readw(&bc->tout);
 743
 744                 if (tail != readw(&bc->tout))
 745                         tail = readw(&bc->tout);
 746                 /* Wrap tail if necessary */
 747                 tail &= (ch->txbufsize - 1);
 748
 749                 if ((remain = tail - head - 1) < 0 )
 750                         remain += ch->txbufsize;
 751
 752                 if (remain && (ch->statusflags & LOWWAIT) == 0) {
 753                         ch->statusflags |= LOWWAIT;
 754                         writeb(1, &bc->ilow);
 755                 }
 756                 memoff(ch);
 757                 spin_unlock_irqrestore(&epca_lock, flags);
 758         }
 759         /* Return how much room is left on card */
 760         return remain;
 761
 762 } /* End pc_write_room */
 763
 764 /* ------------------ Begin pc_chars_in_buffer  ---------------------- */
 765
 766 static int pc_chars_in_buffer(struct tty_struct *tty)
 767 { /* Begin pc_chars_in_buffer */
 768
 769         int chars;
 770         unsigned int ctail, head, tail;
 771         int remain;
 772         unsigned long flags;
 773         struct channel *ch;
 774         struct board_chan __iomem *bc;
 775
 776         /* ---------------------------------------------------------
 777                 verifyChannel returns the channel from the tty struct
 778                 if it is valid.  This serves as a sanity check.
 779         ------------------------------------------------------------- */
 780
 781         if ((ch = verifyChannel(tty)) == NULL)
 782                 return(0);
 783
 784         spin_lock_irqsave(&epca_lock, flags);
 785         globalwinon(ch);
 786
 787         bc = ch->brdchan;
 788         tail = readw(&bc->tout);
 789         head = readw(&bc->tin);
 790         ctail = readw(&ch->mailbox->cout);
 791
 792         if (tail == head && readw(&ch->mailbox->cin) == ctail && readb(&bc->tbusy) == 0)
 793                 chars = 0;
 794         else  { /* Begin if some space on the card has been used */
 795                 head = readw(&bc->tin) & (ch->txbufsize - 1);
 796                 tail &= (ch->txbufsize - 1);
 797                 /*  --------------------------------------------------------------
 798                         The logic here is basically opposite of the above pc_write_room
 799                         here we are finding the amount of bytes in the buffer filled.
 800                         Not the amount of bytes empty.
 801                 ------------------------------------------------------------------- */
 802                 if ((remain = tail - head - 1) < 0 )
 803                         remain += ch->txbufsize;
 804                 chars = (int)(ch->txbufsize - remain);
 805                 /* -------------------------------------------------------------
 806                         Make it possible to wakeup anything waiting for output
 807                         in tty_ioctl.c, etc.
 808
 809                         If not already set.  Setup an event to indicate when the
 810                         transmit buffer empties
 811                 ----------------------------------------------------------------- */
 812                 if (!(ch->statusflags & EMPTYWAIT))
 813                         setup_empty_event(tty,ch);
 814
 815         } /* End if some space on the card has been used */
 816         memoff(ch);
 817         spin_unlock_irqrestore(&epca_lock, flags);
 818         /* Return number of characters residing on card. */
 819         return(chars);
 820
 821 } /* End pc_chars_in_buffer */
 822
 823 /* ------------------ Begin pc_flush_buffer  ---------------------- */
 824
 825 static void pc_flush_buffer(struct tty_struct *tty)
 826 { /* Begin pc_flush_buffer */
 827
 828         unsigned int tail;
 829         unsigned long flags;
 830         struct channel *ch;
 831         struct board_chan __iomem *bc;
 832         /* ---------------------------------------------------------
 833                 verifyChannel returns the channel from the tty struct
 834                 if it is valid.  This serves as a sanity check.
 835         ------------------------------------------------------------- */
 836         if ((ch = verifyChannel(tty)) == NULL)
 837                 return;
 838
 839         spin_lock_irqsave(&epca_lock, flags);
 840         globalwinon(ch);
 841         bc   = ch->brdchan;
 842         tail = readw(&bc->tout);
 843         /* Have FEP move tout pointer; effectively flushing transmit buffer */
 844         fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0);
 845         memoff(ch);
 846         spin_unlock_irqrestore(&epca_lock, flags);
 847         wake_up_interruptible(&tty->write_wait);
 848         tty_wakeup(tty);
 849 } /* End pc_flush_buffer */
 850
 851 /* ------------------ Begin pc_flush_chars  ---------------------- */
 852
 853 static void pc_flush_chars(struct tty_struct *tty)
 854 { /* Begin pc_flush_chars */
 855         struct channel * ch;
 856         /* ---------------------------------------------------------
 857                 verifyChannel returns the channel from the tty struct
 858                 if it is valid.  This serves as a sanity check.
 859         ------------------------------------------------------------- */
 860         if ((ch = verifyChannel(tty)) != NULL) {
 861                 unsigned long flags;
 862                 spin_lock_irqsave(&epca_lock, flags);
 863                 /* ----------------------------------------------------------------
 864                         If not already set and the transmitter is busy setup an event
 865                         to indicate when the transmit empties.
 866                 ------------------------------------------------------------------- */
 867                 if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT))
 868                         setup_empty_event(tty,ch);
 869                 spin_unlock_irqrestore(&epca_lock, flags);
 870         }
 871 } /* End pc_flush_chars */
 872
 873 /* ------------------ Begin block_til_ready  ---------------------- */
 874
 875 static int block_til_ready(struct tty_struct *tty,
 876                            struct file *filp, struct channel *ch)
 877 { /* Begin block_til_ready */
 878         DECLARE_WAITQUEUE(wait,current);
 879         int     retval, do_clocal = 0;
 880         unsigned long flags;
 881
 882         if (tty_hung_up_p(filp)) {
 883                 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
 884                         retval = -EAGAIN;
 885                 else
 886                         retval = -ERESTARTSYS;
 887                 return(retval);
 888         }
 889
 890         /* -----------------------------------------------------------------
 891                 If the device is in the middle of being closed, then block
 892                 until it's done, and then try again.
 893         -------------------------------------------------------------------- */
 894         if (ch->asyncflags & ASYNC_CLOSING) {
 895                 interruptible_sleep_on(&ch->close_wait);
 896
 897                 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
 898                         return -EAGAIN;
 899                 else
 900                         return -ERESTARTSYS;
 901         }
 902
 903         if (filp->f_flags & O_NONBLOCK)  {
 904                 /* -----------------------------------------------------------------
 905                  If non-blocking mode is set, then make the check up front
 906                  and then exit.
 907                 -------------------------------------------------------------------- */
 908                 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
 909                 return 0;
 910         }
 911         if (tty->termios->c_cflag & CLOCAL)
 912                 do_clocal = 1;
 913         /* Block waiting for the carrier detect and the line to become free */
 914
 915         retval = 0;
 916         add_wait_queue(&ch->open_wait, &wait);
 917
 918         spin_lock_irqsave(&epca_lock, flags);
 919         /* We dec count so that pc_close will know when to free things */
 920         if (!tty_hung_up_p(filp))
 921                 ch->count--;
 922         ch->blocked_open++;
 923         while(1)
 924         { /* Begin forever while  */
 925                 set_current_state(TASK_INTERRUPTIBLE);
 926                 if (tty_hung_up_p(filp) ||
 927                     !(ch->asyncflags & ASYNC_INITIALIZED))
 928                 {
 929                         if (ch->asyncflags & ASYNC_HUP_NOTIFY)
 930                                 retval = -EAGAIN;
 931                         else
 932                                 retval = -ERESTARTSYS;
 933                         break;
 934                 }
 935                 if (!(ch->asyncflags & ASYNC_CLOSING) &&
 936                           (do_clocal || (ch->imodem & ch->dcd)))
 937                         break;
 938                 if (signal_pending(current)) {
 939                         retval = -ERESTARTSYS;
 940                         break;
 941                 }
 942                 spin_unlock_irqrestore(&epca_lock, flags);
 943                 /* ---------------------------------------------------------------
 944                         Allow someone else to be scheduled.  We will occasionally go
 945                         through this loop until one of the above conditions change.
 946                         The below schedule call will allow other processes to enter and
 947                         prevent this loop from hogging the cpu.
 948                 ------------------------------------------------------------------ */
 949                 schedule();
 950                 spin_lock_irqsave(&epca_lock, flags);
 951
 952         } /* End forever while  */
 953
 954         current->state = TASK_RUNNING;
 955         remove_wait_queue(&ch->open_wait, &wait);
 956         if (!tty_hung_up_p(filp))
 957                 ch->count++;
 958         ch->blocked_open--;
 959
 960         spin_unlock_irqrestore(&epca_lock, flags);
 961
 962         if (retval)
 963                 return retval;
 964
 965         ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
 966         return 0;
 967 } /* End block_til_ready */
 968
 969 /* ------------------ Begin pc_open  ---------------------- */
 970
 971 static int pc_open(struct tty_struct *tty, struct file * filp)
 972 { /* Begin pc_open */
 973
 974         struct channel *ch;
 975         unsigned long flags;
 976         int line, retval, boardnum;
 977         struct board_chan __iomem *bc;
 978         unsigned int head;
 979
 980         line = tty->index;
 981         if (line < 0 || line >= nbdevs)
 982                 return -ENODEV;
 983
 984         ch = &digi_channels[line];
 985         boardnum = ch->boardnum;
 986
 987         /* Check status of board configured in system.  */
 988
 989         /* -----------------------------------------------------------------
 990                 I check to see if the epca_setup routine detected an user error.
 991                 It might be better to put this in pc_init, but for the moment it
 992                 goes here.
 993         ---------------------------------------------------------------------- */
 994
 995         if (invalid_lilo_config) {
 996                 if (setup_error_code & INVALID_BOARD_TYPE)
 997                         printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n");
 998                 if (setup_error_code & INVALID_NUM_PORTS)
 999                         printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n");
1000                 if (setup_error_code & INVALID_MEM_BASE)
1001                         printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n");
1002                 if (setup_error_code & INVALID_PORT_BASE)
1003                         printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n");
1004                 if (setup_error_code & INVALID_BOARD_STATUS)
1005                         printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n");
1006                 if (setup_error_code & INVALID_ALTPIN)
1007                         printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n");
1008                 tty->driver_data = NULL;   /* Mark this device as 'down' */
1009                 return -ENODEV;
1010         }
1011         if (boardnum >= num_cards || boards[boardnum].status == DISABLED)  {
1012                 tty->driver_data = NULL;   /* Mark this device as 'down' */
1013                 return(-ENODEV);
1014         }
1015
1016         if ((bc = ch->brdchan) == 0) {
1017                 tty->driver_data = NULL;
1018                 return -ENODEV;
1019         }
1020
1021         spin_lock_irqsave(&epca_lock, flags);
1022         /* ------------------------------------------------------------------
1023                 Every time a channel is opened, increment a counter.  This is
1024                 necessary because we do not wish to flush and shutdown the channel
1025                 until the last app holding the channel open, closes it.
1026         --------------------------------------------------------------------- */
1027         ch->count++;
1028         /* ----------------------------------------------------------------
1029                 Set a kernel structures pointer to our local channel
1030                 structure.  This way we can get to it when passed only
1031                 a tty struct.
1032         ------------------------------------------------------------------ */
1033         tty->driver_data = ch;
1034         /* ----------------------------------------------------------------
1035                 If this is the first time the channel has been opened, initialize
1036                 the tty->termios struct otherwise let pc_close handle it.
1037         -------------------------------------------------------------------- */
1038         globalwinon(ch);
1039         ch->statusflags = 0;
1040
1041         /* Save boards current modem status */
1042         ch->imodem = readb(&bc->mstat);
1043
1044         /* ----------------------------------------------------------------
1045            Set receive head and tail ptrs to each other.  This indicates
1046            no data available to read.
1047         ----------------------------------------------------------------- */
1048         head = readw(&bc->rin);
1049         writew(head, &bc->rout);
1050
1051         /* Set the channels associated tty structure */
1052         ch->tty = tty;
1053
1054         /* -----------------------------------------------------------------
1055                 The below routine generally sets up parity, baud, flow control
1056                 issues, etc.... It effect both control flags and input flags.
1057         -------------------------------------------------------------------- */
1058         epcaparam(tty,ch);
1059         ch->asyncflags |= ASYNC_INITIALIZED;
1060         memoff(ch);
1061         spin_unlock_irqrestore(&epca_lock, flags);
1062
1063         retval = block_til_ready(tty, filp, ch);
1064         if (retval)
1065                 return retval;
1066         /* -------------------------------------------------------------
1067                 Set this again in case a hangup set it to zero while this
1068                 open() was waiting for the line...
1069         --------------------------------------------------------------- */
1070         spin_lock_irqsave(&epca_lock, flags);
1071         ch->tty = tty;
1072         globalwinon(ch);
1073         /* Enable Digi Data events */
1074         writeb(1, &bc->idata);
1075         memoff(ch);
1076         spin_unlock_irqrestore(&epca_lock, flags);
1077         return 0;
1078 } /* End pc_open */
1079
1080 static int __init epca_module_init(void)
1081 { /* Begin init_module */
1082         return pc_init();
1083 }
1084
1085 module_init(epca_module_init);
1086
1087 static struct pci_driver epca_driver;
1088
1089 static void __exit epca_module_exit(void)
1090 {
1091         int               count, crd;
1092         struct board_info *bd;
1093         struct channel    *ch;
1094
1095         del_timer_sync(&epca_timer);
1096
1097         if ((tty_unregister_driver(pc_driver)) ||
1098             (tty_unregister_driver(pc_info)))
1099         {
1100                 printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n");
1101                 return;
1102         }
1103         put_tty_driver(pc_driver);
1104         put_tty_driver(pc_info);
1105
1106         for (crd = 0; crd < num_cards; crd++)  { /* Begin for each card */
1107                 bd = &boards[crd];
1108                 if (!bd)
1109                 { /* Begin sanity check */
1110                         printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n");
1111                         return;
1112                 } /* End sanity check */
1113                 ch = card_ptr[crd];
1114                 for (count = 0; count < bd->numports; count++, ch++)
1115                 { /* Begin for each port */
1116                         if (ch && ch->tty)
1117                                 tty_hangup(ch->tty);
1118                 } /* End for each port */
1119         } /* End for each card */
1120         pci_unregister_driver (&epca_driver);
1121 }
1122
1123 module_exit(epca_module_exit);
1124
1125 static const struct tty_operations pc_ops = {
1126         .open = pc_open,
1127         .close = pc_close,
1128         .write = pc_write,
1129         .write_room = pc_write_room,
1130         .flush_buffer = pc_flush_buffer,
1131         .chars_in_buffer = pc_chars_in_buffer,
1132         .flush_chars = pc_flush_chars,
1133         .put_char = pc_put_char,
1134         .ioctl = pc_ioctl,
1135         .set_termios = pc_set_termios,
1136         .stop = pc_stop,
1137         .start = pc_start,
1138         .throttle = pc_throttle,
1139         .unthrottle = pc_unthrottle,
1140         .hangup = pc_hangup,
1141 };
1142
1143 static int info_open(struct tty_struct *tty, struct file * filp)
1144 {
1145         return 0;
1146 }
1147
1148 static struct tty_operations info_ops = {
1149         .open = info_open,
1150         .ioctl = info_ioctl,
1151 };
1152
1153 /* ------------------ Begin pc_init  ---------------------- */
1154
1155 static int __init pc_init(void)
1156 { /* Begin pc_init */
1157         int crd;
1158         struct board_info *bd;
1159         unsigned char board_id = 0;
1160
1161         int pci_boards_found, pci_count;
1162
1163         pci_count = 0;
1164
1165         pc_driver = alloc_tty_driver(MAX_ALLOC);
1166         if (!pc_driver)
1167                 return -ENOMEM;
1168
1169         pc_info = alloc_tty_driver(MAX_ALLOC);
1170         if (!pc_info) {
1171                 put_tty_driver(pc_driver);
1172                 return -ENOMEM;
1173         }
1174
1175         /* -----------------------------------------------------------------------
1176                 If epca_setup has not been ran by LILO set num_cards to defaults; copy
1177                 board structure defined by digiConfig into drivers board structure.
1178                 Note : If LILO has ran epca_setup then epca_setup will handle defining
1179                 num_cards as well as copying the data into the board structure.
1180         -------------------------------------------------------------------------- */
1181         if (!liloconfig) { /* Begin driver has been configured via. epcaconfig */
1182
1183                 nbdevs = NBDEVS;
1184                 num_cards = NUMCARDS;
1185                 memcpy((void *)&boards, (void *)&static_boards,
1186                        (sizeof(struct board_info) * NUMCARDS));
1187         } /* End driver has been configured via. epcaconfig */
1188
1189         /* -----------------------------------------------------------------
1190                 Note : If lilo was used to configure the driver and the
1191                 ignore epcaconfig option was choosen (digiepca=2) then
1192                 nbdevs and num_cards will equal 0 at this point.  This is
1193                 okay; PCI cards will still be picked up if detected.
1194         --------------------------------------------------------------------- */
1195
1196         /*  -----------------------------------------------------------
1197                 Set up interrupt, we will worry about memory allocation in
1198                 post_fep_init.
1199         --------------------------------------------------------------- */
1200
1201
1202         printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION);
1203
1204         /* ------------------------------------------------------------------
1205                 NOTE : This code assumes that the number of ports found in
1206                        the boards array is correct.  This could be wrong if
1207                        the card in question is PCI (And therefore has no ports
1208                        entry in the boards structure.)  The rest of the
1209                        information will be valid for PCI because the beginning
1210                        of pc_init scans for PCI and determines i/o and base
1211                        memory addresses.  I am not sure if it is possible to
1212                        read the number of ports supported by the card prior to
1213                        it being booted (Since that is the state it is in when
1214                        pc_init is run).  Because it is not possible to query the
1215                        number of supported ports until after the card has booted;
1216                        we are required to calculate the card_ptrs as the card is
1217                        is initialized (Inside post_fep_init).  The negative thing
1218                        about this approach is that digiDload's call to GET_INFO
1219                        will have a bad port value.  (Since this is called prior
1220                        to post_fep_init.)
1221
1222         --------------------------------------------------------------------- */
1223
1224         pci_boards_found = 0;
1225         if(num_cards < MAXBOARDS)
1226                 pci_boards_found += init_PCI();
1227         num_cards += pci_boards_found;
1228
1229         pc_driver->owner = THIS_MODULE;
1230         pc_driver->name = "ttyD";
1231         pc_driver->major = DIGI_MAJOR;
1232         pc_driver->minor_start = 0;
1233         pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
1234         pc_driver->subtype = SERIAL_TYPE_NORMAL;
1235         pc_driver->init_termios = tty_std_termios;
1236         pc_driver->init_termios.c_iflag = 0;
1237         pc_driver->init_termios.c_oflag = 0;
1238         pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1239         pc_driver->init_termios.c_lflag = 0;
1240         pc_driver->flags = TTY_DRIVER_REAL_RAW;
1241         tty_set_operations(pc_driver, &pc_ops);
1242
1243         pc_info->owner = THIS_MODULE;
1244         pc_info->name = "digi_ctl";
1245         pc_info->major = DIGIINFOMAJOR;
1246         pc_info->minor_start = 0;
1247         pc_info->type = TTY_DRIVER_TYPE_SERIAL;
1248         pc_info->subtype = SERIAL_TYPE_INFO;
1249         pc_info->init_termios = tty_std_termios;
1250         pc_info->init_termios.c_iflag = 0;
1251         pc_info->init_termios.c_oflag = 0;
1252         pc_info->init_termios.c_lflag = 0;
1253         pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL;
1254         pc_info->flags = TTY_DRIVER_REAL_RAW;
1255         tty_set_operations(pc_info, &info_ops);
1256
1257
1258         for (crd = 0; crd < num_cards; crd++)
1259         { /* Begin for each card */
1260
1261                 /*  ------------------------------------------------------------------
1262                         This is where the appropriate memory handlers for the hardware is
1263                         set.  Everything at runtime blindly jumps through these vectors.
1264                 ---------------------------------------------------------------------- */
1265
1266                 /* defined in epcaconfig.h */
1267                 bd = &boards[crd];
1268
1269                 switch (bd->type)
1270                 { /* Begin switch on bd->type {board type} */
1271                         case PCXEM:
1272                         case EISAXEM:
1273                                 bd->memwinon     = pcxem_memwinon ;
1274                                 bd->memwinoff    = pcxem_memwinoff ;
1275                                 bd->globalwinon  = pcxem_globalwinon ;
1276                                 bd->txwinon      = pcxem_txwinon ;
1277                                 bd->rxwinon      = pcxem_rxwinon ;
1278                                 bd->memoff       = pcxem_memoff ;
1279                                 bd->assertgwinon = dummy_assertgwinon;
1280                                 bd->assertmemoff = dummy_assertmemoff;
1281                                 break;
1282
1283                         case PCIXEM:
1284                         case PCIXRJ:
1285                         case PCIXR:
1286                                 bd->memwinon     = dummy_memwinon;
1287                                 bd->memwinoff    = dummy_memwinoff;
1288                                 bd->globalwinon  = dummy_globalwinon;
1289                                 bd->txwinon      = dummy_txwinon;
1290                                 bd->rxwinon      = dummy_rxwinon;
1291                                 bd->memoff       = dummy_memoff;
1292                                 bd->assertgwinon = dummy_assertgwinon;
1293                                 bd->assertmemoff = dummy_assertmemoff;
1294                                 break;
1295
1296                         case PCXE:
1297                         case PCXEVE:
1298
1299                                 bd->memwinon     = pcxe_memwinon;
1300                                 bd->memwinoff    = pcxe_memwinoff;
1301                                 bd->globalwinon  = pcxe_globalwinon;
1302                                 bd->txwinon      = pcxe_txwinon;
1303                                 bd->rxwinon      = pcxe_rxwinon;
1304                                 bd->memoff       = pcxe_memoff;
1305                                 bd->assertgwinon = dummy_assertgwinon;
1306                                 bd->assertmemoff = dummy_assertmemoff;
1307                                 break;
1308
1309                         case PCXI:
1310                         case PC64XE:
1311
1312                                 bd->memwinon     = pcxi_memwinon;
1313                                 bd->memwinoff    = pcxi_memwinoff;
1314                                 bd->globalwinon  = pcxi_globalwinon;
1315                                 bd->txwinon      = pcxi_txwinon;
1316                                 bd->rxwinon      = pcxi_rxwinon;
1317                                 bd->memoff       = pcxi_memoff;
1318                                 bd->assertgwinon = pcxi_assertgwinon;
1319                                 bd->assertmemoff = pcxi_assertmemoff;
1320                                 break;
1321
1322                         default:
1323                                 break;
1324
1325                 } /* End switch on bd->type */
1326
1327                 /* ---------------------------------------------------------------
1328                         Some cards need a memory segment to be defined for use in
1329                         transmit and receive windowing operations.  These boards
1330                         are listed in the below switch.  In the case of the XI the
1331                         amount of memory on the board is variable so the memory_seg
1332                         is also variable.  This code determines what they segment
1333                         should be.
1334                 ----------------------------------------------------------------- */
1335
1336                 switch (bd->type)
1337                 { /* Begin switch on bd->type {board type} */
1338
1339                         case PCXE:
1340                         case PCXEVE:
1341                         case PC64XE:
1342                                 bd->memory_seg = 0xf000;
1343                         break;
1344
1345                         case PCXI:
1346                                 board_id = inb((int)bd->port);
1347                                 if ((board_id & 0x1) == 0x1)
1348                                 { /* Begin it's an XI card */
1349
1350                                         /* Is it a 64K board */
1351                                         if ((board_id & 0x30) == 0)
1352                                                 bd->memory_seg = 0xf000;
1353
1354                                         /* Is it a 128K board */
1355                                         if ((board_id & 0x30) == 0x10)
1356                                                 bd->memory_seg = 0xe000;
1357
1358                                         /* Is is a 256K board */
1359                                         if ((board_id & 0x30) == 0x20)
1360                                                 bd->memory_seg = 0xc000;
1361
1362                                         /* Is it a 512K board */
1363                                         if ((board_id & 0x30) == 0x30)
1364                                                 bd->memory_seg = 0x8000;
1365
1366                                 } else printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port);
1367                         break;
1368
1369                 } /* End switch on bd->type */
1370
1371         } /* End for each card */
1372
1373         if (tty_register_driver(pc_driver))
1374                 panic("Couldn't register Digi PC/ driver");
1375
1376         if (tty_register_driver(pc_info))
1377                 panic("Couldn't register Digi PC/ info ");
1378
1379         /* -------------------------------------------------------------------
1380            Start up the poller to check for events on all enabled boards
1381         ---------------------------------------------------------------------- */
1382
1383         init_timer(&epca_timer);
1384         epca_timer.function = epcapoll;
1385         mod_timer(&epca_timer, jiffies + HZ/25);
1386         return 0;
1387
1388 } /* End pc_init */
1389
1390 /* ------------------ Begin post_fep_init  ---------------------- */
1391
1392 static void post_fep_init(unsigned int crd)
1393 { /* Begin post_fep_init */
1394
1395         int i;
1396         void __iomem *memaddr;
1397         struct global_data __iomem *gd;
1398         struct board_info *bd;
1399         struct board_chan __iomem *bc;
1400         struct channel *ch;
1401         int shrinkmem = 0, lowwater ;
1402
1403         /*  -------------------------------------------------------------
1404                 This call is made by the user via. the ioctl call DIGI_INIT.
1405                 It is responsible for setting up all the card specific stuff.
1406         ---------------------------------------------------------------- */
1407         bd = &boards[crd];
1408
1409         /* -----------------------------------------------------------------
1410                 If this is a PCI board, get the port info.  Remember PCI cards
1411                 do not have entries into the epcaconfig.h file, so we can't get
1412                 the number of ports from it.  Unfortunetly, this means that anyone
1413                 doing a DIGI_GETINFO before the board has booted will get an invalid
1414                 number of ports returned (It should return 0).  Calls to DIGI_GETINFO
1415                 after DIGI_INIT has been called will return the proper values.
1416         ------------------------------------------------------------------- */
1417
1418         if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */
1419                 /* --------------------------------------------------------------------
1420                         Below we use XEMPORTS as a memory offset regardless of which PCI
1421                         card it is.  This is because all of the supported PCI cards have
1422                         the same memory offset for the channel data.  This will have to be
1423                         changed if we ever develop a PCI/XE card.  NOTE : The FEP manual
1424                         states that the port offset is 0xC22 as opposed to 0xC02.  This is
1425                         only true for PC/XE, and PC/XI cards; not for the XEM, or CX series.
1426                         On the PCI cards the number of ports is determined by reading a
1427                         ID PROM located in the box attached to the card.  The card can then
1428                         determine the index the id to determine the number of ports available.
1429                         (FYI - The id should be located at 0x1ac (And may use up to 4 bytes
1430                         if the box in question is a XEM or CX)).
1431                 ------------------------------------------------------------------------ */
1432                 /* PCI cards are already remapped at this point ISA are not */
1433                 bd->numports = readw(bd->re_map_membase + XEMPORTS);
1434                 epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports");
1435                 nbdevs += (bd->numports);
1436         } else {
1437                 /* Fix up the mappings for ISA/EISA etc */
1438                 /* FIXME: 64K - can we be smarter ? */
1439                 bd->re_map_membase = ioremap(bd->membase, 0x10000);
1440         }
1441
1442         if (crd != 0)
1443                 card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports;
1444         else
1445                 card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */
1446
1447         ch = card_ptr[crd];
1448         epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range");
1449
1450         memaddr = bd->re_map_membase;
1451
1452         /* -----------------------------------------------------------------
1453                 The below assignment will set bc to point at the BEGINING of
1454                 the cards channel structures.  For 1 card there will be between
1455                 8 and 64 of these structures.
1456         -------------------------------------------------------------------- */
1457
1458         bc = memaddr + CHANSTRUCT;
1459
1460         /* -------------------------------------------------------------------
1461                 The below assignment will set gd to point at the BEGINING of
1462                 global memory address 0xc00.  The first data in that global
1463                 memory actually starts at address 0xc1a.  The command in
1464                 pointer begins at 0xd10.
1465         ---------------------------------------------------------------------- */
1466
1467         gd = memaddr + GLOBAL;
1468
1469         /* --------------------------------------------------------------------
1470                 XEPORTS (address 0xc22) points at the number of channels the
1471                 card supports. (For 64XE, XI, XEM, and XR use 0xc02)
1472         ----------------------------------------------------------------------- */
1473
1474         if ((bd->type == PCXEVE || bd->type == PCXE) && (readw(memaddr + XEPORTS) < 3))
1475                 shrinkmem = 1;
1476         if (bd->type < PCIXEM)
1477                 if (!request_region((int)bd->port, 4, board_desc[bd->type]))
1478                         return;
1479         memwinon(bd, 0);
1480
1481         /*  --------------------------------------------------------------------
1482                 Remember ch is the main drivers channels structure, while bc is
1483            the cards channel structure.
1484         ------------------------------------------------------------------------ */
1485
1486         /* For every port on the card do ..... */
1487
1488         for (i = 0; i < bd->numports; i++, ch++, bc++)  { /* Begin for each port */
1489                 unsigned long flags;
1490                 u16 tseg, rseg;
1491
1492                 ch->brdchan        = bc;
1493                 ch->mailbox        = gd;
1494                 INIT_WORK(&ch->tqueue, do_softint, ch);
1495                 ch->board          = &boards[crd];
1496
1497                 spin_lock_irqsave(&epca_lock, flags);
1498                 switch (bd->type) {
1499                         /* ----------------------------------------------------------------
1500                                 Since some of the boards use different bitmaps for their
1501                                 control signals we cannot hard code these values and retain
1502                                 portability.  We virtualize this data here.
1503                         ------------------------------------------------------------------- */
1504                         case EISAXEM:
1505                         case PCXEM:
1506                         case PCIXEM:
1507                         case PCIXRJ:
1508                         case PCIXR:
1509                                 ch->m_rts = 0x02 ;
1510                                 ch->m_dcd = 0x80 ;
1511                                 ch->m_dsr = 0x20 ;
1512                                 ch->m_cts = 0x10 ;
1513                                 ch->m_ri  = 0x40 ;
1514                                 ch->m_dtr = 0x01 ;
1515                                 break;
1516
1517                         case PCXE:
1518                         case PCXEVE:
1519                         case PCXI:
1520                         case PC64XE:
1521                                 ch->m_rts = 0x02 ;
1522                                 ch->m_dcd = 0x08 ;
1523                                 ch->m_dsr = 0x10 ;
1524                                 ch->m_cts = 0x20 ;
1525                                 ch->m_ri  = 0x40 ;
1526                                 ch->m_dtr = 0x80 ;
1527                                 break;
1528
1529                 } /* End switch bd->type */
1530
1531                 if (boards[crd].altpin) {
1532                         ch->dsr = ch->m_dcd;
1533                         ch->dcd = ch->m_dsr;
1534                         ch->digiext.digi_flags |= DIGI_ALTPIN;
1535                 }
1536                 else {
1537                         ch->dcd = ch->m_dcd;
1538                         ch->dsr = ch->m_dsr;
1539                 }
1540
1541                 ch->boardnum   = crd;
1542                 ch->channelnum = i;
1543                 ch->magic      = EPCA_MAGIC;
1544                 ch->tty        = NULL;
1545
1546                 if (shrinkmem) {
1547                         fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
1548                         shrinkmem = 0;
1549                 }
1550
1551                 tseg = readw(&bc->tseg);
1552                 rseg = readw(&bc->rseg);
1553
1554                 switch (bd->type) {
1555
1556                         case PCIXEM:
1557                         case PCIXRJ:
1558                         case PCIXR:
1559                                 /* Cover all the 2MEG cards */
1560                                 ch->txptr = memaddr + ((tseg << 4) & 0x1fffff);
1561                                 ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff);
1562                                 ch->txwin = FEPWIN | (tseg >> 11);
1563                                 ch->rxwin = FEPWIN | (rseg >> 11);
1564                                 break;
1565
1566                         case PCXEM:
1567                         case EISAXEM:
1568                                 /* Cover all the 32K windowed cards */
1569                                 /* Mask equal to window size - 1 */
1570                                 ch->txptr = memaddr + ((tseg << 4) & 0x7fff);
1571                                 ch->rxptr = memaddr + ((rseg << 4) & 0x7fff);
1572                                 ch->txwin = FEPWIN | (tseg >> 11);
1573                                 ch->rxwin = FEPWIN | (rseg >> 11);
1574                                 break;
1575
1576                         case PCXEVE:
1577                         case PCXE:
1578                                 ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff);
1579                                 ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9);
1580                                 ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff);
1581                                 ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 );
1582                                 break;
1583
1584                         case PCXI:
1585                         case PC64XE:
1586                                 ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4);
1587                                 ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4);
1588                                 ch->txwin = ch->rxwin = 0;
1589                                 break;
1590
1591                 } /* End switch bd->type */
1592
1593                 ch->txbufhead = 0;
1594                 ch->txbufsize = readw(&bc->tmax) + 1;
1595
1596                 ch->rxbufhead = 0;
1597                 ch->rxbufsize = readw(&bc->rmax) + 1;
1598
1599                 lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2);
1600
1601                 /* Set transmitter low water mark */
1602                 fepcmd(ch, STXLWATER, lowwater, 0, 10, 0);
1603
1604                 /* Set receiver low water mark */
1605
1606                 fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0);
1607
1608                 /* Set receiver high water mark */
1609
1610                 fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0);
1611
1612                 writew(100, &bc->edelay);
1613                 writeb(1, &bc->idata);
1614
1615                 ch->startc  = readb(&bc->startc);
1616                 ch->stopc   = readb(&bc->stopc);
1617                 ch->startca = readb(&bc->startca);
1618                 ch->stopca  = readb(&bc->stopca);
1619
1620                 ch->fepcflag = 0;
1621                 ch->fepiflag = 0;
1622                 ch->fepoflag = 0;
1623                 ch->fepstartc = 0;
1624                 ch->fepstopc = 0;
1625                 ch->fepstartca = 0;
1626                 ch->fepstopca = 0;
1627
1628                 ch->close_delay = 50;
1629                 ch->count = 0;
1630                 ch->blocked_open = 0;
1631                 init_waitqueue_head(&ch->open_wait);
1632                 init_waitqueue_head(&ch->close_wait);
1633
1634                 spin_unlock_irqrestore(&epca_lock, flags);
1635         } /* End for each port */
1636
1637         printk(KERN_INFO
1638                 "Digi PC/Xx Driver V%s:  %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
1639                 VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports);
1640         memwinoff(bd, 0);
1641
1642 } /* End post_fep_init */
1643
1644 /* --------------------- Begin epcapoll  ------------------------ */
1645
1646 static void epcapoll(unsigned long ignored)
1647 { /* Begin epcapoll */
1648
1649         unsigned long flags;
1650         int crd;
1651         volatile unsigned int head, tail;
1652         struct channel *ch;
1653         struct board_info *bd;
1654
1655         /* -------------------------------------------------------------------
1656                 This routine is called upon every timer interrupt.  Even though
1657                 the Digi series cards are capable of generating interrupts this
1658                 method of non-looping polling is more efficient.  This routine
1659                 checks for card generated events (Such as receive data, are transmit
1660                 buffer empty) and acts on those events.
1661         ----------------------------------------------------------------------- */
1662
1663         for (crd = 0; crd < num_cards; crd++)
1664         { /* Begin for each card */
1665
1666                 bd = &boards[crd];
1667                 ch = card_ptr[crd];
1668
1669                 if ((bd->status == DISABLED) || digi_poller_inhibited)
1670                         continue; /* Begin loop next interation */
1671
1672                 /* -----------------------------------------------------------
1673                         assertmemoff is not needed here; indeed it is an empty subroutine.
1674                         It is being kept because future boards may need this as well as
1675                         some legacy boards.
1676                 ---------------------------------------------------------------- */
1677
1678                 spin_lock_irqsave(&epca_lock, flags);
1679
1680                 assertmemoff(ch);
1681
1682                 globalwinon(ch);
1683
1684                 /* ---------------------------------------------------------------
1685                         In this case head and tail actually refer to the event queue not
1686                         the transmit or receive queue.
1687                 ------------------------------------------------------------------- */
1688
1689                 head = readw(&ch->mailbox->ein);
1690                 tail = readw(&ch->mailbox->eout);
1691
1692                 /* If head isn't equal to tail we have an event */
1693
1694                 if (head != tail)
1695                         doevent(crd);
1696                 memoff(ch);
1697
1698                 spin_unlock_irqrestore(&epca_lock, flags);
1699
1700         } /* End for each card */
1701         mod_timer(&epca_timer, jiffies + (HZ / 25));
1702 } /* End epcapoll */
1703
1704 /* --------------------- Begin doevent  ------------------------ */
1705
1706 static void doevent(int crd)
1707 { /* Begin doevent */
1708
1709         void __iomem *eventbuf;
1710         struct channel *ch, *chan0;
1711         static struct tty_struct *tty;
1712         struct board_info *bd;
1713         struct board_chan __iomem *bc;
1714         unsigned int tail, head;
1715         int event, channel;
1716         int mstat, lstat;
1717
1718         /* -------------------------------------------------------------------
1719                 This subroutine is called by epcapoll when an event is detected
1720                 in the event queue.  This routine responds to those events.
1721         --------------------------------------------------------------------- */
1722         bd = &boards[crd];
1723
1724         chan0 = card_ptr[crd];
1725         epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range");
1726         assertgwinon(chan0);
1727         while ((tail = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein)))
1728         { /* Begin while something in event queue */
1729                 assertgwinon(chan0);
1730                 eventbuf = bd->re_map_membase + tail + ISTART;
1731                 /* Get the channel the event occurred on */
1732                 channel = readb(eventbuf);
1733                 /* Get the actual event code that occurred */
1734                 event = readb(eventbuf + 1);
1735                 /*  ----------------------------------------------------------------
1736                         The two assignments below get the current modem status (mstat)
1737                         and the previous modem status (lstat).  These are useful becuase
1738                         an event could signal a change in modem signals itself.
1739                 ------------------------------------------------------------------- */
1740                 mstat = readb(eventbuf + 2);
1741                 lstat = readb(eventbuf + 3);
1742
1743                 ch = chan0 + channel;
1744                 if ((unsigned)channel >= bd->numports || !ch)  {
1745                         if (channel >= bd->numports)
1746                                 ch = chan0;
1747                         bc = ch->brdchan;
1748                         goto next;
1749                 }
1750
1751                 if ((bc = ch->brdchan) == NULL)
1752                         goto next;
1753
1754                 if (event & DATA_IND)  { /* Begin DATA_IND */
1755                         receive_data(ch);
1756                         assertgwinon(ch);
1757                 } /* End DATA_IND */
1758                 /* else *//* Fix for DCD transition missed bug */
1759                 if (event & MODEMCHG_IND)  { /* Begin MODEMCHG_IND */
1760                         /* A modem signal change has been indicated */
1761                         ch->imodem = mstat;
1762                         if (ch->asyncflags & ASYNC_CHECK_CD)  {
1763                                 if (mstat & ch->dcd)  /* We are now receiving dcd */
1764                                         wake_up_interruptible(&ch->open_wait);
1765                                 else
1766                                         pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */
1767                         }
1768                 } /* End MODEMCHG_IND */
1769                 tty = ch->tty;
1770                 if (tty)  { /* Begin if valid tty */
1771                         if (event & BREAK_IND)  { /* Begin if BREAK_IND */
1772                                 /* A break has been indicated */
1773                                 tty_insert_flip_char(tty, 0, TTY_BREAK);
1774                                 tty_schedule_flip(tty);
1775                         } else if (event & LOWTX_IND)  { /* Begin LOWTX_IND */
1776                                 if (ch->statusflags & LOWWAIT)
1777                                 { /* Begin if LOWWAIT */
1778                                         ch->statusflags &= ~LOWWAIT;
1779                                         tty_wakeup(tty);
1780                                         wake_up_interruptible(&tty->write_wait);
1781                                 } /* End if LOWWAIT */
1782                         } else if (event & EMPTYTX_IND)  { /* Begin EMPTYTX_IND */
1783                                 /* This event is generated by setup_empty_event */
1784                                 ch->statusflags &= ~TXBUSY;
1785                                 if (ch->statusflags & EMPTYWAIT)  { /* Begin if EMPTYWAIT */
1786                                         ch->statusflags &= ~EMPTYWAIT;
1787                                         tty_wakeup(tty);
1788                                         wake_up_interruptible(&tty->write_wait);
1789                                 } /* End if EMPTYWAIT */
1790                         } /* End EMPTYTX_IND */
1791                 } /* End if valid tty */
1792         next:
1793                 globalwinon(ch);
1794                 BUG_ON(!bc);
1795                 writew(1, &bc->idata);
1796                 writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout);
1797                 globalwinon(chan0);
1798         } /* End while something in event queue */
1799 } /* End doevent */
1800
1801 /* --------------------- Begin fepcmd  ------------------------ */
1802
1803 static void fepcmd(struct channel *ch, int cmd, int word_or_byte,
1804                    int byte2, int ncmds, int bytecmd)
1805 { /* Begin fepcmd */
1806         unchar __iomem *memaddr;
1807         unsigned int head, cmdTail, cmdStart, cmdMax;
1808         long count;
1809         int n;
1810
1811         /* This is the routine in which commands may be passed to the card. */
1812
1813         if (ch->board->status == DISABLED)
1814                 return;
1815         assertgwinon(ch);
1816         /* Remember head (As well as max) is just an offset not a base addr */
1817         head = readw(&ch->mailbox->cin);
1818         /* cmdStart is a base address */
1819         cmdStart = readw(&ch->mailbox->cstart);
1820         /* ------------------------------------------------------------------
1821                 We do the addition below because we do not want a max pointer
1822                 relative to cmdStart.  We want a max pointer that points at the
1823                 physical end of the command queue.
1824         -------------------------------------------------------------------- */
1825         cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax));
1826         memaddr = ch->board->re_map_membase;
1827
1828         if (head >= (cmdMax - cmdStart) || (head & 03))  {
1829                 printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__,  cmd, head);
1830                 printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__,  cmdMax, cmdStart);
1831                 return;
1832         }
1833         if (bytecmd)  {
1834                 writeb(cmd, memaddr + head + cmdStart + 0);
1835                 writeb(ch->channelnum,  memaddr + head + cmdStart + 1);
1836                 /* Below word_or_byte is bits to set */
1837                 writeb(word_or_byte,  memaddr + head + cmdStart + 2);
1838                 /* Below byte2 is bits to reset */
1839                 writeb(byte2, memaddr + head + cmdStart + 3);
1840         }  else {
1841                 writeb(cmd, memaddr + head + cmdStart + 0);
1842                 writeb(ch->channelnum,  memaddr + head + cmdStart + 1);
1843                 writeb(word_or_byte,  memaddr + head + cmdStart + 2);
1844         }
1845         head = (head + 4) & (cmdMax - cmdStart - 4);
1846         writew(head, &ch->mailbox->cin);
1847         count = FEPTIMEOUT;
1848
1849         for (;;)  { /* Begin forever loop */
1850                 count--;
1851                 if (count == 0)  {
1852                         printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n");
1853                         return;
1854                 }
1855                 head = readw(&ch->mailbox->cin);
1856                 cmdTail = readw(&ch->mailbox->cout);
1857                 n = (head - cmdTail) & (cmdMax - cmdStart - 4);
1858                 /* ----------------------------------------------------------
1859                         Basically this will break when the FEP acknowledges the
1860                         command by incrementing cmdTail (Making it equal to head).
1861                 ------------------------------------------------------------- */
1862                 if (n <= ncmds * (sizeof(short) * 4))
1863                         break; /* Well nearly forever :-) */
1864         } /* End forever loop */
1865 } /* End fepcmd */
1866
1867 /* ---------------------------------------------------------------------
1868         Digi products use fields in their channels structures that are very
1869         similar to the c_cflag and c_iflag fields typically found in UNIX
1870         termios structures.  The below three routines allow mappings
1871         between these hardware "flags" and their respective Linux flags.
1872 ------------------------------------------------------------------------- */
1873
1874 /* --------------------- Begin termios2digi_h -------------------- */
1875
1876 static unsigned termios2digi_h(struct channel *ch, unsigned cflag)
1877 { /* Begin termios2digi_h */
1878         unsigned res = 0;
1879
1880         if (cflag & CRTSCTS) {
1881                 ch->digiext.digi_flags |= (RTSPACE | CTSPACE);
1882                 res |= ((ch->m_cts) | (ch->m_rts));
1883         }
1884
1885         if (ch->digiext.digi_flags & RTSPACE)
1886                 res |= ch->m_rts;
1887
1888         if (ch->digiext.digi_flags & DTRPACE)
1889                 res |= ch->m_dtr;
1890
1891         if (ch->digiext.digi_flags & CTSPACE)
1892                 res |= ch->m_cts;
1893
1894         if (ch->digiext.digi_flags & DSRPACE)
1895                 res |= ch->dsr;
1896
1897         if (ch->digiext.digi_flags & DCDPACE)
1898                 res |= ch->dcd;
1899
1900         if (res & (ch->m_rts))
1901                 ch->digiext.digi_flags |= RTSPACE;
1902
1903         if (res & (ch->m_cts))
1904                 ch->digiext.digi_flags |= CTSPACE;
1905
1906         return res;
1907
1908 } /* End termios2digi_h */
1909
1910 /* --------------------- Begin termios2digi_i -------------------- */
1911 static unsigned termios2digi_i(struct channel *ch, unsigned iflag)
1912 { /* Begin termios2digi_i */
1913
1914         unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK |
1915                                 INPCK | ISTRIP|IXON|IXANY|IXOFF);
1916         if (ch->digiext.digi_flags & DIGI_AIXON)
1917                 res |= IAIXON;
1918         return res;
1919
1920 } /* End termios2digi_i */
1921
1922 /* --------------------- Begin termios2digi_c -------------------- */
1923
1924 static unsigned termios2digi_c(struct channel *ch, unsigned cflag)
1925 { /* Begin termios2digi_c */
1926
1927         unsigned res = 0;
1928         if (cflag & CBAUDEX) { /* Begin detected CBAUDEX */
1929                 ch->digiext.digi_flags |= DIGI_FAST;
1930                 /* -------------------------------------------------------------
1931                    HUPCL bit is used by FEP to indicate fast baud
1932                    table is to be used.
1933                 ----------------------------------------------------------------- */
1934                 res |= FEP_HUPCL;
1935         } /* End detected CBAUDEX */
1936         else ch->digiext.digi_flags &= ~DIGI_FAST;
1937         /* -------------------------------------------------------------------
1938                 CBAUD has bit position 0x1000 set these days to indicate Linux
1939                 baud rate remap.  Digi hardware can't handle the bit assignment.
1940                 (We use a different bit assignment for high speed.).  Clear this
1941                 bit out.
1942         ---------------------------------------------------------------------- */
1943         res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE);
1944         /* -------------------------------------------------------------
1945                 This gets a little confusing.  The Digi cards have their own
1946                 representation of c_cflags controling baud rate.  For the most
1947                 part this is identical to the Linux implementation.  However;
1948                 Digi supports one rate (76800) that Linux doesn't.  This means
1949                 that the c_cflag entry that would normally mean 76800 for Digi
1950                 actually means 115200 under Linux.  Without the below mapping,
1951                 a stty 115200 would only drive the board at 76800.  Since
1952                 the rate 230400 is also found after 76800, the same problem afflicts
1953                 us when we choose a rate of 230400.  Without the below modificiation
1954                 stty 230400 would actually give us 115200.
1955
1956                 There are two additional differences.  The Linux value for CLOCAL
1957                 (0x800; 0004000) has no meaning to the Digi hardware.  Also in
1958                 later releases of Linux; the CBAUD define has CBAUDEX (0x1000;
1959                 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX
1960                 should be checked for a screened out prior to termios2digi_c
1961                 returning.  Since CLOCAL isn't used by the board this can be
1962                 ignored as long as the returned value is used only by Digi hardware.
1963                 ----------------------------------------------------------------- */
1964         if (cflag & CBAUDEX) {
1965                 /* -------------------------------------------------------------
1966                         The below code is trying to guarantee that only baud rates
1967                         115200 and 230400 are remapped.  We use exclusive or because
1968                         the various baud rates share common bit positions and therefore
1969                         can't be tested for easily.
1970                 ----------------------------------------------------------------- */
1971
1972
1973                 if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) ||
1974                     (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX))))
1975                         res += 1;
1976         }
1977         return res;
1978
1979 } /* End termios2digi_c */
1980
1981 /* --------------------- Begin epcaparam  ----------------------- */
1982
1983 /* Caller must hold the locks */
1984 static void epcaparam(struct tty_struct *tty, struct channel *ch)
1985 { /* Begin epcaparam */
1986
1987         unsigned int cmdHead;
1988         struct termios *ts;
1989         struct board_chan __iomem *bc;
1990         unsigned mval, hflow, cflag, iflag;
1991
1992         bc = ch->brdchan;
1993         epcaassert(bc !=0, "bc out of range");
1994
1995         assertgwinon(ch);
1996         ts = tty->termios;
1997         if ((ts->c_cflag & CBAUD) == 0)  { /* Begin CBAUD detected */
1998                 cmdHead = readw(&bc->rin);
1999                 writew(cmdHead, &bc->rout);
2000                 cmdHead = readw(&bc->tin);
2001                 /* Changing baud in mid-stream transmission can be wonderful */
2002                 /* ---------------------------------------------------------------
2003                         Flush current transmit buffer by setting cmdTail pointer (tout)
2004                         to cmdHead pointer (tin).  Hopefully the transmit buffer is empty.
2005                 ----------------------------------------------------------------- */
2006                 fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0);
2007                 mval = 0;
2008         } else  { /* Begin CBAUD not detected */
2009                 /* -------------------------------------------------------------------
2010                         c_cflags have changed but that change had nothing to do with BAUD.
2011                         Propagate the change to the card.
2012                 ---------------------------------------------------------------------- */
2013                 cflag = termios2digi_c(ch, ts->c_cflag);
2014                 if (cflag != ch->fepcflag)  {
2015                         ch->fepcflag = cflag;
2016                         /* Set baud rate, char size, stop bits, parity */
2017                         fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0);
2018                 }
2019                 /* ----------------------------------------------------------------
2020                         If the user has not forced CLOCAL and if the device is not a
2021                         CALLOUT device (Which is always CLOCAL) we set flags such that
2022                         the driver will wait on carrier detect.
2023                 ------------------------------------------------------------------- */
2024                 if (ts->c_cflag & CLOCAL)
2025                         ch->asyncflags &= ~ASYNC_CHECK_CD;
2026                 else
2027                         ch->asyncflags |= ASYNC_CHECK_CD;
2028                 mval = ch->m_dtr | ch->m_rts;
2029         } /* End CBAUD not detected */
2030         iflag = termios2digi_i(ch, ts->c_iflag);
2031         /* Check input mode flags */
2032         if (iflag != ch->fepiflag)  {
2033                 ch->fepiflag = iflag;
2034                 /* ---------------------------------------------------------------
2035                         Command sets channels iflag structure on the board. Such things
2036                         as input soft flow control, handling of parity errors, and
2037                         break handling are all set here.
2038                 ------------------------------------------------------------------- */
2039                 /* break handling, parity handling, input stripping, flow control chars */
2040                 fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0);
2041         }
2042         /* ---------------------------------------------------------------
2043                 Set the board mint value for this channel.  This will cause hardware
2044                 events to be generated each time the DCD signal (Described in mint)
2045                 changes.
2046         ------------------------------------------------------------------- */
2047         writeb(ch->dcd, &bc->mint);
2048         if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD))
2049                 if (ch->digiext.digi_flags & DIGI_FORCEDCD)
2050                         writeb(0, &bc->mint);
2051         ch->imodem = readb(&bc->mstat);
2052         hflow = termios2digi_h(ch, ts->c_cflag);
2053         if (hflow != ch->hflow)  {
2054                 ch->hflow = hflow;
2055                 /* --------------------------------------------------------------
2056                         Hard flow control has been selected but the board is not
2057                         using it.  Activate hard flow control now.
2058                 ----------------------------------------------------------------- */
2059                 fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1);
2060         }
2061         mval ^= ch->modemfake & (mval ^ ch->modem);
2062
2063         if (ch->omodem ^ mval)  {
2064                 ch->omodem = mval;
2065                 /* --------------------------------------------------------------
2066                         The below command sets the DTR and RTS mstat structure.  If
2067                         hard flow control is NOT active these changes will drive the
2068                         output of the actual DTR and RTS lines.  If hard flow control
2069                         is active, the changes will be saved in the mstat structure and
2070                         only asserted when hard flow control is turned off.
2071                 ----------------------------------------------------------------- */
2072
2073                 /* First reset DTR & RTS; then set them */
2074                 fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1);
2075                 fepcmd(ch, SETMODEM, mval, 0, 0, 1);
2076         }
2077         if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc)  {
2078                 ch->fepstartc = ch->startc;
2079                 ch->fepstopc = ch->stopc;
2080                 /* ------------------------------------------------------------
2081                         The XON / XOFF characters have changed; propagate these
2082                         changes to the card.
2083                 --------------------------------------------------------------- */
2084                 fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
2085         }
2086         if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca)  {
2087                 ch->fepstartca = ch->startca;
2088                 ch->fepstopca = ch->stopca;
2089                 /* ---------------------------------------------------------------
2090                         Similar to the above, this time the auxilarly XON / XOFF
2091                         characters have changed; propagate these changes to the card.
2092                 ------------------------------------------------------------------ */
2093                 fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
2094         }
2095 } /* End epcaparam */
2096
2097 /* --------------------- Begin receive_data  ----------------------- */
2098 /* Caller holds lock */
2099 static void receive_data(struct channel *ch)
2100 { /* Begin receive_data */
2101
2102         unchar *rptr;
2103         struct termios *ts = NULL;
2104         struct tty_struct *tty;
2105         struct board_chan __iomem *bc;
2106         int dataToRead, wrapgap, bytesAvailable;
2107         unsigned int tail, head;
2108         unsigned int wrapmask;
2109
2110         /* ---------------------------------------------------------------
2111                 This routine is called by doint when a receive data event
2112                 has taken place.
2113         ------------------------------------------------------------------- */
2114
2115         globalwinon(ch);
2116         if (ch->statusflags & RXSTOPPED)
2117                 return;
2118         tty = ch->tty;
2119         if (tty)
2120                 ts = tty->termios;
2121         bc = ch->brdchan;
2122         BUG_ON(!bc);
2123         wrapmask = ch->rxbufsize - 1;
2124
2125         /* ---------------------------------------------------------------------
2126                 Get the head and tail pointers to the receiver queue.  Wrap the
2127                 head pointer if it has reached the end of the buffer.
2128         ------------------------------------------------------------------------ */
2129         head = readw(&bc->rin);
2130         head &= wrapmask;
2131         tail = readw(&bc->rout) & wrapmask;
2132
2133         bytesAvailable = (head - tail) & wrapmask;
2134         if (bytesAvailable == 0)
2135                 return;
2136
2137         /* ------------------------------------------------------------------
2138            If CREAD bit is off or device not open, set TX tail to head
2139         --------------------------------------------------------------------- */
2140
2141         if (!tty || !ts || !(ts->c_cflag & CREAD))  {
2142                 writew(head, &bc->rout);
2143                 return;
2144         }
2145
2146         if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0)
2147                 return;
2148
2149         if (readb(&bc->orun)) {
2150                 writeb(0, &bc->orun);
2151                 printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n",tty->name);
2152                 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
2153         }
2154         rxwinon(ch);
2155         while (bytesAvailable > 0)  { /* Begin while there is data on the card */
2156                 wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail;
2157                 /* ---------------------------------------------------------------
2158                         Even if head has wrapped around only report the amount of
2159                         data to be equal to the size - tail.  Remember memcpy can't
2160                         automaticly wrap around the receive buffer.
2161                 ----------------------------------------------------------------- */
2162                 dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable;
2163                 /* --------------------------------------------------------------
2164                    Make sure we don't overflow the buffer
2165                 ----------------------------------------------------------------- */
2166                 dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead);
2167                 if (dataToRead == 0)
2168                         break;
2169                 /* ---------------------------------------------------------------
2170                         Move data read from our card into the line disciplines buffer
2171                         for translation if necessary.
2172                 ------------------------------------------------------------------ */
2173                 memcpy_fromio(rptr, ch->rxptr + tail, dataToRead);
2174                 tail = (tail + dataToRead) & wrapmask;
2175                 bytesAvailable -= dataToRead;
2176         } /* End while there is data on the card */
2177         globalwinon(ch);
2178         writew(tail, &bc->rout);
2179         /* Must be called with global data */
2180         tty_schedule_flip(ch->tty);
2181         return;
2182 } /* End receive_data */
2183
2184 static int info_ioctl(struct tty_struct *tty, struct file * file,
2185                     unsigned int cmd, unsigned long arg)
2186 {
2187         switch (cmd)
2188         { /* Begin switch cmd */
2189                 case DIGI_GETINFO:
2190                 { /* Begin case DIGI_GETINFO */
2191                         struct digi_info di ;
2192                         int brd;
2193
2194                         if(get_user(brd, (unsigned int __user *)arg))
2195                                 return -EFAULT;
2196                         if (brd < 0 || brd >= num_cards || num_cards == 0)
2197                                 return -ENODEV;
2198
2199                         memset(&di, 0, sizeof(di));
2200
2201                         di.board = brd ;
2202                         di.status = boards[brd].status;
2203                         di.type = boards[brd].type ;
2204                         di.numports = boards[brd].numports ;
2205                         /* Legacy fixups - just move along nothing to see */
2206                         di.port = (unsigned char *)boards[brd].port ;
2207                         di.membase = (unsigned char *)boards[brd].membase ;
2208
2209                         if (copy_to_user((void __user *)arg, &di, sizeof (di)))
2210                                 return -EFAULT;
2211                         break;
2212
2213                 } /* End case DIGI_GETINFO */
2214
2215                 case DIGI_POLLER:
2216                 { /* Begin case DIGI_POLLER */
2217
2218                         int brd = arg & 0xff000000 >> 16 ;
2219                         unsigned char state = arg & 0xff ;
2220
2221                         if (brd < 0 || brd >= num_cards) {
2222                                 printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n");
2223                                 return (-ENODEV);
2224                         }
2225                         digi_poller_inhibited = state ;
2226                         break ;
2227                 } /* End case DIGI_POLLER */
2228
2229                 case DIGI_INIT:
2230                 { /* Begin case DIGI_INIT */
2231                         /* ------------------------------------------------------------
2232                                 This call is made by the apps to complete the initilization
2233                                 of the board(s).  This routine is responsible for setting
2234                                 the card to its initial state and setting the drivers control
2235                                 fields to the sutianle settings for the card in question.
2236                         ---------------------------------------------------------------- */
2237                         int crd ;
2238                         for (crd = 0; crd < num_cards; crd++)
2239                                 post_fep_init (crd);
2240                         break ;
2241                 } /* End case DIGI_INIT */
2242                 default:
2243                         return -ENOTTY;
2244         } /* End switch cmd */
2245         return (0) ;
2246 }
2247 /* --------------------- Begin pc_ioctl  ----------------------- */
2248
2249 static int pc_tiocmget(struct tty_struct *tty, struct file *file)
2250 {
2251         struct channel *ch = (struct channel *) tty->driver_data;
2252         struct board_chan __iomem *bc;
2253         unsigned int mstat, mflag = 0;
2254         unsigned long flags;
2255
2256         if (ch)
2257                 bc = ch->brdchan;
2258         else
2259                 return -EINVAL;
2260
2261         spin_lock_irqsave(&epca_lock, flags);
2262         globalwinon(ch);
2263         mstat = readb(&bc->mstat);
2264         memoff(ch);
2265         spin_unlock_irqrestore(&epca_lock, flags);
2266
2267         if (mstat & ch->m_dtr)
2268                 mflag |= TIOCM_DTR;
2269         if (mstat & ch->m_rts)
2270                 mflag |= TIOCM_RTS;
2271         if (mstat & ch->m_cts)
2272                 mflag |= TIOCM_CTS;
2273         if (mstat & ch->dsr)
2274                 mflag |= TIOCM_DSR;
2275         if (mstat & ch->m_ri)
2276                 mflag |= TIOCM_RI;
2277         if (mstat & ch->dcd)
2278                 mflag |= TIOCM_CD;
2279         return mflag;
2280 }
2281
2282 static int pc_tiocmset(struct tty_struct *tty, struct file *file,
2283                        unsigned int set, unsigned int clear)
2284 {
2285         struct channel *ch = (struct channel *) tty->driver_data;
2286         unsigned long flags;
2287
2288         if (!ch)
2289                 return -EINVAL;
2290
2291         spin_lock_irqsave(&epca_lock, flags);
2292         /*
2293          * I think this modemfake stuff is broken.  It doesn't
2294          * correctly reflect the behaviour desired by the TIOCM*
2295          * ioctls.  Therefore this is probably broken.
2296          */
2297         if (set & TIOCM_RTS) {
2298                 ch->modemfake |= ch->m_rts;
2299                 ch->modem |= ch->m_rts;
2300         }
2301         if (set & TIOCM_DTR) {
2302                 ch->modemfake |= ch->m_dtr;
2303                 ch->modem |= ch->m_dtr;
2304         }
2305         if (clear & TIOCM_RTS) {
2306                 ch->modemfake |= ch->m_rts;
2307                 ch->modem &= ~ch->m_rts;
2308         }
2309         if (clear & TIOCM_DTR) {
2310                 ch->modemfake |= ch->m_dtr;
2311                 ch->modem &= ~ch->m_dtr;
2312         }
2313         globalwinon(ch);
2314         /*  --------------------------------------------------------------
2315                 The below routine generally sets up parity, baud, flow control
2316                 issues, etc.... It effect both control flags and input flags.
2317         ------------------------------------------------------------------ */
2318         epcaparam(tty,ch);
2319         memoff(ch);
2320         spin_unlock_irqrestore(&epca_lock, flags);
2321         return 0;
2322 }
2323
2324 static int pc_ioctl(struct tty_struct *tty, struct file * file,
2325                     unsigned int cmd, unsigned long arg)
2326 { /* Begin pc_ioctl */
2327
2328         digiflow_t dflow;
2329         int retval;
2330         unsigned long flags;
2331         unsigned int mflag, mstat;
2332         unsigned char startc, stopc;
2333         struct board_chan __iomem *bc;
2334         struct channel *ch = (struct channel *) tty->driver_data;
2335         void __user *argp = (void __user *)arg;
2336
2337         if (ch)
2338                 bc = ch->brdchan;
2339         else
2340                 return -EINVAL;
2341
2342         /* -------------------------------------------------------------------
2343                 For POSIX compliance we need to add more ioctls.  See tty_ioctl.c
2344                 in /usr/src/linux/drivers/char for a good example.  In particular
2345                 think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS.
2346         ---------------------------------------------------------------------- */
2347
2348         switch (cmd)
2349         { /* Begin switch cmd */
2350
2351                 case TCGETS:
2352                         if (copy_to_user(argp, tty->termios, sizeof(struct termios)))
2353                                 return -EFAULT;
2354                         return 0;
2355                 case TCGETA:
2356                         return get_termio(tty, argp);
2357                 case TCSBRK:    /* SVID version: non-zero arg --> no break */
2358                         retval = tty_check_change(tty);
2359                         if (retval)
2360                                 return retval;
2361                         /* Setup an event to indicate when the transmit buffer empties */
2362                         spin_lock_irqsave(&epca_lock, flags);
2363                         setup_empty_event(tty,ch);
2364                         spin_unlock_irqrestore(&epca_lock, flags);
2365                         tty_wait_until_sent(tty, 0);
2366                         if (!arg)
2367                                 digi_send_break(ch, HZ/4);    /* 1/4 second */
2368                         return 0;
2369                 case TCSBRKP:   /* support for POSIX tcsendbreak() */
2370                         retval = tty_check_change(tty);
2371                         if (retval)
2372                                 return retval;
2373
2374                         /* Setup an event to indicate when the transmit buffer empties */
2375                         spin_lock_irqsave(&epca_lock, flags);
2376                         setup_empty_event(tty,ch);
2377                         spin_unlock_irqrestore(&epca_lock, flags);
2378                         tty_wait_until_sent(tty, 0);
2379                         digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
2380                         return 0;
2381                 case TIOCGSOFTCAR:
2382                         if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg))
2383                                 return -EFAULT;
2384                         return 0;
2385                 case TIOCSSOFTCAR:
2386                 {
2387                         unsigned int value;
2388
2389                         if (get_user(value, (unsigned __user *)argp))
2390                                 return -EFAULT;
2391                         tty->termios->c_cflag =
2392                                 ((tty->termios->c_cflag & ~CLOCAL) |
2393                                  (value ? CLOCAL : 0));
2394                         return 0;
2395                 }
2396                 case TIOCMODG:
2397                         mflag = pc_tiocmget(tty, file);
2398                         if (put_user(mflag, (unsigned long __user *)argp))
2399                                 return -EFAULT;
2400                         break;
2401                 case TIOCMODS:
2402                         if (get_user(mstat, (unsigned __user *)argp))
2403                                 return -EFAULT;
2404                         return pc_tiocmset(tty, file, mstat, ~mstat);
2405                 case TIOCSDTR:
2406                         spin_lock_irqsave(&epca_lock, flags);
2407                         ch->omodem |= ch->m_dtr;
2408                         globalwinon(ch);
2409                         fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
2410                         memoff(ch);
2411                         spin_unlock_irqrestore(&epca_lock, flags);
2412                         break;
2413
2414                 case TIOCCDTR:
2415                         spin_lock_irqsave(&epca_lock, flags);
2416                         ch->omodem &= ~ch->m_dtr;
2417                         globalwinon(ch);
2418                         fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
2419                         memoff(ch);
2420                         spin_unlock_irqrestore(&epca_lock, flags);
2421                         break;
2422                 case DIGI_GETA:
2423                         if (copy_to_user(argp, &ch->digiext, sizeof(digi_t)))
2424                                 return -EFAULT;
2425                         break;
2426                 case DIGI_SETAW:
2427                 case DIGI_SETAF:
2428                         if (cmd == DIGI_SETAW) {
2429                                 /* Setup an event to indicate when the transmit buffer empties */
2430                                 spin_lock_irqsave(&epca_lock, flags);
2431                                 setup_empty_event(tty,ch);
2432                                 spin_unlock_irqrestore(&epca_lock, flags);
2433                                 tty_wait_until_sent(tty, 0);
2434                         } else  {
2435                                 /* ldisc lock already held in ioctl */
2436                                 if (tty->ldisc.flush_buffer)
2437                                         tty->ldisc.flush_buffer(tty);
2438                         }
2439                         /* Fall Thru */
2440                 case DIGI_SETA:
2441                         if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
2442                                 return -EFAULT;
2443
2444                         if (ch->digiext.digi_flags & DIGI_ALTPIN)  {
2445                                 ch->dcd = ch->m_dsr;
2446                                 ch->dsr = ch->m_dcd;
2447                         } else {
2448                                 ch->dcd = ch->m_dcd;
2449                                 ch->dsr = ch->m_dsr;
2450                         }
2451
2452                         spin_lock_irqsave(&epca_lock, flags);
2453                         globalwinon(ch);
2454
2455                         /* -----------------------------------------------------------------
2456                                 The below routine generally sets up parity, baud, flow control
2457                                 issues, etc.... It effect both control flags and input flags.
2458                         ------------------------------------------------------------------- */
2459
2460                         epcaparam(tty,ch);
2461                         memoff(ch);
2462                         spin_unlock_irqrestore(&epca_lock, flags);
2463                         break;
2464
2465                 case DIGI_GETFLOW:
2466                 case DIGI_GETAFLOW:
2467                         spin_lock_irqsave(&epca_lock, flags);
2468                         globalwinon(ch);
2469                         if (cmd == DIGI_GETFLOW) {
2470                                 dflow.startc = readb(&bc->startc);
2471                                 dflow.stopc = readb(&bc->stopc);
2472                         } else {
2473                                 dflow.startc = readb(&bc->startca);
2474                                 dflow.stopc = readb(&bc->stopca);
2475                         }
2476                         memoff(ch);
2477                         spin_unlock_irqrestore(&epca_lock, flags);
2478
2479                         if (copy_to_user(argp, &dflow, sizeof(dflow)))
2480                                 return -EFAULT;
2481                         break;
2482
2483                 case DIGI_SETAFLOW:
2484                 case DIGI_SETFLOW:
2485                         if (cmd == DIGI_SETFLOW) {
2486                                 startc = ch->startc;
2487                                 stopc = ch->stopc;
2488                         } else {
2489                                 startc = ch->startca;
2490                                 stopc = ch->stopca;
2491                         }
2492
2493                         if (copy_from_user(&dflow, argp, sizeof(dflow)))
2494                                 return -EFAULT;
2495
2496                         if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin  if setflow toggled */
2497                                 spin_lock_irqsave(&epca_lock, flags);
2498                                 globalwinon(ch);
2499
2500                                 if (cmd == DIGI_SETFLOW) {
2501                                         ch->fepstartc = ch->startc = dflow.startc;
2502                                         ch->fepstopc = ch->stopc = dflow.stopc;
2503                                         fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
2504                                 } else {
2505                                         ch->fepstartca = ch->startca = dflow.startc;
2506                                         ch->fepstopca  = ch->stopca = dflow.stopc;
2507                                         fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
2508                                 }
2509
2510                                 if (ch->statusflags & TXSTOPPED)
2511                                         pc_start(tty);
2512
2513                                 memoff(ch);
2514                                 spin_unlock_irqrestore(&epca_lock, flags);
2515                         } /* End if setflow toggled */
2516                         break;
2517                 default:
2518                         return -ENOIOCTLCMD;
2519         } /* End switch cmd */
2520         return 0;
2521 } /* End pc_ioctl */
2522
2523 /* --------------------- Begin pc_set_termios  ----------------------- */
2524
2525 static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios)
2526 { /* Begin pc_set_termios */
2527
2528         struct channel *ch;
2529         unsigned long flags;
2530         /* ---------------------------------------------------------
2531                 verifyChannel returns the channel from the tty struct
2532                 if it is valid.  This serves as a sanity check.
2533         ------------------------------------------------------------- */
2534         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if channel valid */
2535                 spin_lock_irqsave(&epca_lock, flags);
2536                 globalwinon(ch);
2537                 epcaparam(tty, ch);
2538                 memoff(ch);
2539                 spin_unlock_irqrestore(&epca_lock, flags);
2540
2541                 if ((old_termios->c_cflag & CRTSCTS) &&
2542                          ((tty->termios->c_cflag & CRTSCTS) == 0))
2543                         tty->hw_stopped = 0;
2544
2545                 if (!(old_termios->c_cflag & CLOCAL) &&
2546                          (tty->termios->c_cflag & CLOCAL))
2547                         wake_up_interruptible(&ch->open_wait);
2548
2549         } /* End if channel valid */
2550
2551 } /* End pc_set_termios */
2552
2553 /* --------------------- Begin do_softint  ----------------------- */
2554
2555 static void do_softint(void *private_)
2556 { /* Begin do_softint */
2557         struct channel *ch = (struct channel *) private_;
2558         /* Called in response to a modem change event */
2559         if (ch && ch->magic == EPCA_MAGIC)  { /* Begin EPCA_MAGIC */
2560                 struct tty_struct *tty = ch->tty;
2561
2562                 if (tty && tty->driver_data) {
2563                         if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { /* Begin if clear_bit */
2564                                 tty_hangup(tty);        /* FIXME: module removal race here - AKPM */
2565                                 wake_up_interruptible(&ch->open_wait);
2566                                 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
2567                         } /* End if clear_bit */
2568                 }
2569         } /* End EPCA_MAGIC */
2570 } /* End do_softint */
2571
2572 /* ------------------------------------------------------------
2573         pc_stop and pc_start provide software flow control to the
2574         routine and the pc_ioctl routine.
2575 ---------------------------------------------------------------- */
2576
2577 /* --------------------- Begin pc_stop  ----------------------- */
2578
2579 static void pc_stop(struct tty_struct *tty)
2580 { /* Begin pc_stop */
2581
2582         struct channel *ch;
2583         unsigned long flags;
2584         /* ---------------------------------------------------------
2585                 verifyChannel returns the channel from the tty struct
2586                 if it is valid.  This serves as a sanity check.
2587         ------------------------------------------------------------- */
2588         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if valid channel */
2589                 spin_lock_irqsave(&epca_lock, flags);
2590                 if ((ch->statusflags & TXSTOPPED) == 0)  { /* Begin if transmit stop requested */
2591                         globalwinon(ch);
2592                         /* STOP transmitting now !! */
2593                         fepcmd(ch, PAUSETX, 0, 0, 0, 0);
2594                         ch->statusflags |= TXSTOPPED;
2595                         memoff(ch);
2596                 } /* End if transmit stop requested */
2597                 spin_unlock_irqrestore(&epca_lock, flags);
2598         } /* End if valid channel */
2599 } /* End pc_stop */
2600
2601 /* --------------------- Begin pc_start  ----------------------- */
2602
2603 static void pc_start(struct tty_struct *tty)
2604 { /* Begin pc_start */
2605         struct channel *ch;
2606         /* ---------------------------------------------------------
2607                 verifyChannel returns the channel from the tty struct
2608                 if it is valid.  This serves as a sanity check.
2609         ------------------------------------------------------------- */
2610         if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */
2611                 unsigned long flags;
2612                 spin_lock_irqsave(&epca_lock, flags);
2613                 /* Just in case output was resumed because of a change in Digi-flow */
2614                 if (ch->statusflags & TXSTOPPED)  { /* Begin transmit resume requested */
2615                         struct board_chan __iomem *bc;
2616                         globalwinon(ch);
2617                         bc = ch->brdchan;
2618                         if (ch->statusflags & LOWWAIT)
2619                                 writeb(1, &bc->ilow);
2620                         /* Okay, you can start transmitting again... */
2621                         fepcmd(ch, RESUMETX, 0, 0, 0, 0);
2622                         ch->statusflags &= ~TXSTOPPED;
2623                         memoff(ch);
2624                 } /* End transmit resume requested */
2625                 spin_unlock_irqrestore(&epca_lock, flags);
2626         } /* End if channel valid */
2627 } /* End pc_start */
2628
2629 /* ------------------------------------------------------------------
2630         The below routines pc_throttle and pc_unthrottle are used
2631         to slow (And resume) the receipt of data into the kernels
2632         receive buffers.  The exact occurrence of this depends on the
2633         size of the kernels receive buffer and what the 'watermarks'
2634         are set to for that buffer.  See the n_ttys.c file for more
2635         details.
2636 ______________________________________________________________________ */
2637 /* --------------------- Begin throttle  ----------------------- */
2638
2639 static void pc_throttle(struct tty_struct * tty)
2640 { /* Begin pc_throttle */
2641         struct channel *ch;
2642         unsigned long flags;
2643         /* ---------------------------------------------------------
2644                 verifyChannel returns the channel from the tty struct
2645                 if it is valid.  This serves as a sanity check.
2646         ------------------------------------------------------------- */
2647         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if channel valid */
2648                 spin_lock_irqsave(&epca_lock, flags);
2649                 if ((ch->statusflags & RXSTOPPED) == 0) {
2650                         globalwinon(ch);
2651                         fepcmd(ch, PAUSERX, 0, 0, 0, 0);
2652                         ch->statusflags |= RXSTOPPED;
2653                         memoff(ch);
2654                 }
2655                 spin_unlock_irqrestore(&epca_lock, flags);
2656         } /* End if channel valid */
2657 } /* End pc_throttle */
2658
2659 /* --------------------- Begin unthrottle  ----------------------- */
2660
2661 static void pc_unthrottle(struct tty_struct *tty)
2662 { /* Begin pc_unthrottle */
2663         struct channel *ch;
2664         unsigned long flags;
2665         /* ---------------------------------------------------------
2666                 verifyChannel returns the channel from the tty struct
2667                 if it is valid.  This serves as a sanity check.
2668         ------------------------------------------------------------- */
2669         if ((ch = verifyChannel(tty)) != NULL)  { /* Begin if channel valid */
2670                 /* Just in case output was resumed because of a change in Digi-flow */
2671                 spin_lock_irqsave(&epca_lock, flags);
2672                 if (ch->statusflags & RXSTOPPED) {
2673                         globalwinon(ch);
2674                         fepcmd(ch, RESUMERX, 0, 0, 0, 0);
2675                         ch->statusflags &= ~RXSTOPPED;
2676                         memoff(ch);
2677                 }
2678                 spin_unlock_irqrestore(&epca_lock, flags);
2679         } /* End if channel valid */
2680 } /* End pc_unthrottle */
2681
2682 /* --------------------- Begin digi_send_break  ----------------------- */
2683
2684 void digi_send_break(struct channel *ch, int msec)
2685 { /* Begin digi_send_break */
2686         unsigned long flags;
2687
2688         spin_lock_irqsave(&epca_lock, flags);
2689         globalwinon(ch);
2690         /* --------------------------------------------------------------------
2691            Maybe I should send an infinite break here, schedule() for
2692            msec amount of time, and then stop the break.  This way,
2693            the user can't screw up the FEP by causing digi_send_break()
2694            to be called (i.e. via an ioctl()) more than once in msec amount
2695            of time.  Try this for now...
2696         ------------------------------------------------------------------------ */
2697         fepcmd(ch, SENDBREAK, msec, 0, 10, 0);
2698         memoff(ch);
2699         spin_unlock_irqrestore(&epca_lock, flags);
2700 } /* End digi_send_break */
2701
2702 /* --------------------- Begin setup_empty_event  ----------------------- */
2703
2704 /* Caller MUST hold the lock */
2705
2706 static void setup_empty_event(struct tty_struct *tty, struct channel *ch)
2707 { /* Begin setup_empty_event */
2708
2709         struct board_chan __iomem *bc = ch->brdchan;
2710
2711         globalwinon(ch);
2712         ch->statusflags |= EMPTYWAIT;
2713         /* ------------------------------------------------------------------
2714                 When set the iempty flag request a event to be generated when the
2715                 transmit buffer is empty (If there is no BREAK in progress).
2716         --------------------------------------------------------------------- */
2717         writeb(1, &bc->iempty);
2718         memoff(ch);
2719 } /* End setup_empty_event */
2720
2721 /* --------------------- Begin get_termio ----------------------- */
2722
2723 static int get_termio(struct tty_struct * tty, struct termio __user * termio)
2724 { /* Begin get_termio */
2725         return kernel_termios_to_user_termio(termio, tty->termios);
2726 } /* End get_termio */
2727
2728 /* ---------------------- Begin epca_setup  -------------------------- */
2729 void epca_setup(char *str, int *ints)
2730 { /* Begin epca_setup */
2731         struct board_info board;
2732         int               index, loop, last;
2733         char              *temp, *t2;
2734         unsigned          len;
2735
2736         /* ----------------------------------------------------------------------
2737                 If this routine looks a little strange it is because it is only called
2738                 if a LILO append command is given to boot the kernel with parameters.
2739                 In this way, we can provide the user a method of changing his board
2740                 configuration without rebuilding the kernel.
2741         ----------------------------------------------------------------------- */
2742         if (!liloconfig)
2743                 liloconfig = 1;
2744
2745         memset(&board, 0, sizeof(board));
2746
2747         /* Assume the data is int first, later we can change it */
2748         /* I think that array position 0 of ints holds the number of args */
2749         for (last = 0, index = 1; index <= ints[0]; index++)
2750                 switch(index)
2751                 { /* Begin parse switch */
2752                         case 1:
2753                                 board.status = ints[index];
2754                                 /* ---------------------------------------------------------
2755                                         We check for 2 (As opposed to 1; because 2 is a flag
2756                                         instructing the driver to ignore epcaconfig.)  For this
2757                                         reason we check for 2.
2758                                 ------------------------------------------------------------ */
2759                                 if (board.status == 2) { /* Begin ignore epcaconfig as well as lilo cmd line */
2760                                         nbdevs = 0;
2761                                         num_cards = 0;
2762                                         return;
2763                                 } /* End ignore epcaconfig as well as lilo cmd line */
2764
2765                                 if (board.status > 2) {
2766                                         printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", board.status);
2767                                         invalid_lilo_config = 1;
2768                                         setup_error_code |= INVALID_BOARD_STATUS;
2769                                         return;
2770                                 }
2771                                 last = index;
2772                                 break;
2773                         case 2:
2774                                 board.type = ints[index];
2775                                 if (board.type >= PCIXEM)  {
2776                                         printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type);
2777                                         invalid_lilo_config = 1;
2778                                         setup_error_code |= INVALID_BOARD_TYPE;
2779                                         return;
2780                                 }
2781                                 last = index;
2782                                 break;
2783                         case 3:
2784                                 board.altpin = ints[index];
2785                                 if (board.altpin > 1) {
2786                                         printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin);
2787                                         invalid_lilo_config = 1;
2788                                         setup_error_code |= INVALID_ALTPIN;
2789                                         return;
2790                                 }
2791                                 last = index;
2792                                 break;
2793
2794                         case 4:
2795                                 board.numports = ints[index];
2796                                 if (board.numports < 2 || board.numports > 256) {
2797                                         printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports);
2798                                         invalid_lilo_config = 1;
2799                                         setup_error_code |= INVALID_NUM_PORTS;
2800                                         return;
2801                                 }
2802                                 nbdevs += board.numports;
2803                                 last = index;
2804                                 break;
2805
2806                         case 5:
2807                                 board.port = ints[index];
2808                                 if (ints[index] <= 0) {
2809                                         printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port);
2810                                         invalid_lilo_config = 1;
2811                                         setup_error_code |= INVALID_PORT_BASE;
2812                                         return;
2813                                 }
2814                                 last = index;
2815                                 break;
2816
2817                         case 6:
2818                                 board.membase = ints[index];
2819                                 if (ints[index] <= 0) {
2820                                         printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase);
2821                                         invalid_lilo_config = 1;
2822                                         setup_error_code |= INVALID_MEM_BASE;
2823                                         return;
2824                                 }
2825                                 last = index;
2826                                 break;
2827
2828                         default:
2829                                 printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n");
2830                                 return;
2831
2832                 } /* End parse switch */
2833
2834         while (str && *str)  { /* Begin while there is a string arg */
2835                 /* find the next comma or terminator */
2836                 temp = str;
2837                 /* While string is not null, and a comma hasn't been found */
2838                 while (*temp && (*temp != ','))
2839                         temp++;
2840                 if (!*temp)
2841                         temp = NULL;
2842                 else
2843                         *temp++ = 0;
2844                 /* Set index to the number of args + 1 */
2845                 index = last + 1;
2846
2847                 switch(index)
2848                 {
2849                         case 1:
2850                                 len = strlen(str);
2851                                 if (strncmp("Disable", str, len) == 0)
2852                                         board.status = 0;
2853                                 else if (strncmp("Enable", str, len) == 0)
2854                                         board.status = 1;
2855                                 else {
2856                                         printk(KERN_ERR "epca_setup: Invalid status %s\n", str);
2857                                         invalid_lilo_config = 1;
2858                                         setup_error_code |= INVALID_BOARD_STATUS;
2859                                         return;
2860                                 }
2861                                 last = index;
2862                                 break;
2863
2864                         case 2:
2865                                 for(loop = 0; loop < EPCA_NUM_TYPES; loop++)
2866                                         if (strcmp(board_desc[loop], str) == 0)
2867                                                 break;
2868                                 /* ---------------------------------------------------------------
2869                                         If the index incremented above refers to a legitamate board
2870                                         type set it here.
2871                                 ------------------------------------------------------------------*/
2872                                 if (index < EPCA_NUM_TYPES)
2873                                         board.type = loop;
2874                                 else {
2875                                         printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str);
2876                                         invalid_lilo_config = 1;
2877                                         setup_error_code |= INVALID_BOARD_TYPE;
2878                                         return;
2879                                 }
2880                                 last = index;
2881                                 break;
2882
2883                         case 3:
2884                                 len = strlen(str);
2885                                 if (strncmp("Disable", str, len) == 0)
2886                                         board.altpin = 0;
2887                                 else if (strncmp("Enable", str, len) == 0)
2888                                         board.altpin = 1;
2889                                 else {
2890                                         printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str);
2891                                         invalid_lilo_config = 1;
2892                                         setup_error_code |= INVALID_ALTPIN;
2893                                         return;
2894                                 }
2895                                 last = index;
2896                                 break;
2897
2898                         case 4:
2899                                 t2 = str;
2900                                 while (isdigit(*t2))
2901                                         t2++;
2902
2903                                 if (*t2) {
2904                                         printk(KERN_ERR "epca_setup: Invalid port count %s\n", str);
2905                                         invalid_lilo_config = 1;
2906                                         setup_error_code |= INVALID_NUM_PORTS;
2907                                         return;
2908                                 }
2909
2910                                 /* ------------------------------------------------------------
2911                                         There is not a man page for simple_strtoul but the code can be
2912                                         found in vsprintf.c.  The first argument is the string to
2913                                         translate (To an unsigned long obviously),  the second argument
2914                                         can be the address of any character variable or a NULL.  If a
2915                                         variable is given, the end pointer of the string will be stored
2916                                         in that variable; if a NULL is given the end pointer will
2917                                         not be returned.  The last argument is the base to use.  If
2918                                         a 0 is indicated, the routine will attempt to determine the
2919                                         proper base by looking at the values prefix (A '0' for octal,
2920                                         a 'x' for hex, etc ...  If a value is given it will use that
2921                                         value as the base.
2922                                 ---------------------------------------------------------------- */
2923                                 board.numports = simple_strtoul(str, NULL, 0);
2924                                 nbdevs += board.numports;
2925                                 last = index;
2926                                 break;
2927
2928                         case 5:
2929                                 t2 = str;
2930                                 while (isxdigit(*t2))
2931                                         t2++;
2932
2933                                 if (*t2) {
2934                                         printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str);
2935                                         invalid_lilo_config = 1;
2936                                         setup_error_code |= INVALID_PORT_BASE;
2937                                         return;
2938                                 }
2939
2940                                 board.port = simple_strtoul(str, NULL, 16);
2941                                 last = index;
2942                                 break;
2943
2944                         case 6:
2945                                 t2 = str;
2946                                 while (isxdigit(*t2))
2947                                         t2++;
2948
2949                                 if (*t2) {
2950                                         printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str);
2951                                         invalid_lilo_config = 1;
2952                                         setup_error_code |= INVALID_MEM_BASE;
2953                                         return;
2954                                 }
2955                                 board.membase = simple_strtoul(str, NULL, 16);
2956                                 last = index;
2957                                 break;
2958                         default:
2959                                 printk(KERN_ERR "epca: Too many string parms\n");
2960                                 return;
2961                 }
2962                 str = temp;
2963         } /* End while there is a string arg */
2964
2965         if (last < 6) {
2966                 printk(KERN_ERR "epca: Insufficient parms specified\n");
2967                 return;
2968         }
2969
2970         /* I should REALLY validate the stuff here */
2971         /* Copies our local copy of board into boards */
2972         memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board));
2973         /* Does this get called once per lilo arg are what ? */
2974         printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n",
2975                 num_cards, board_desc[board.type],
2976                 board.numports, (int)board.port, (unsigned int) board.membase);
2977         num_cards++;
2978 } /* End epca_setup */
2979
2980
2981 /* ------------------------ Begin init_PCI  --------------------------- */
2982
2983 enum epic_board_types {
2984         brd_xr = 0,
2985         brd_xem,
2986         brd_cx,
2987         brd_xrj,
2988 };
2989
2990
2991 /* indexed directly by epic_board_types enum */
2992 static struct {
2993         unsigned char board_type;
2994         unsigned bar_idx;               /* PCI base address region */
2995 } epca_info_tbl[] = {
2996         { PCIXR, 0, },
2997         { PCIXEM, 0, },
2998         { PCICX, 0, },
2999         { PCIXRJ, 2, },
3000 };
3001
3002 static int __devinit epca_init_one (struct pci_dev *pdev,
3003                                  const struct pci_device_id *ent)
3004 {
3005         static int board_num = -1;
3006         int board_idx, info_idx = ent->driver_data;
3007         unsigned long addr;
3008
3009         if (pci_enable_device(pdev))
3010                 return -EIO;
3011
3012         board_num++;
3013         board_idx = board_num + num_cards;
3014         if (board_idx >= MAXBOARDS)
3015                 goto err_out;
3016
3017         addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx);
3018         if (!addr) {
3019                 printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n",
3020                         epca_info_tbl[info_idx].bar_idx);
3021                 goto err_out;
3022         }
3023
3024         boards[board_idx].status = ENABLED;
3025         boards[board_idx].type = epca_info_tbl[info_idx].board_type;
3026         boards[board_idx].numports = 0x0;
3027         boards[board_idx].port = addr + PCI_IO_OFFSET;
3028         boards[board_idx].membase = addr;
3029
3030         if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) {
3031                 printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
3032                         0x200000, addr + PCI_IO_OFFSET);
3033                 goto err_out;
3034         }
3035
3036         boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000);
3037         if (!boards[board_idx].re_map_port) {
3038                 printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
3039                         0x200000, addr + PCI_IO_OFFSET);
3040                 goto err_out_free_pciio;
3041         }
3042
3043         if (!request_mem_region (addr, 0x200000, "epca")) {
3044                 printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
3045                         0x200000, addr);
3046                 goto err_out_free_iounmap;
3047         }
3048
3049         boards[board_idx].re_map_membase = ioremap(addr, 0x200000);
3050         if (!boards[board_idx].re_map_membase) {
3051                 printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
3052                         0x200000, addr + PCI_IO_OFFSET);
3053                 goto err_out_free_memregion;
3054         }
3055
3056         /* --------------------------------------------------------------
3057                 I don't know what the below does, but the hardware guys say
3058                 its required on everything except PLX (In this case XRJ).
3059         ---------------------------------------------------------------- */
3060         if (info_idx != brd_xrj) {
3061                 pci_write_config_byte(pdev, 0x40, 0);
3062                 pci_write_config_byte(pdev, 0x46, 0);
3063         }
3064
3065         return 0;
3066
3067 err_out_free_memregion:
3068         release_mem_region (addr, 0x200000);
3069 err_out_free_iounmap:
3070         iounmap (boards[board_idx].re_map_port);
3071 err_out_free_pciio:
3072         release_mem_region (addr + PCI_IO_OFFSET, 0x200000);
3073 err_out:
3074         return -ENODEV;
3075 }
3076
3077
3078 static struct pci_device_id epca_pci_tbl[] = {
3079         { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr },
3080         { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem },
3081         { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx },
3082         { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj },
3083         { 0, }
3084 };
3085
3086 MODULE_DEVICE_TABLE(pci, epca_pci_tbl);
3087
3088 int __init init_PCI (void)
3089 {       /* Begin init_PCI */
3090         memset (&epca_driver, 0, sizeof (epca_driver));
3091         epca_driver.name = "epca";
3092         epca_driver.id_table = epca_pci_tbl;
3093         epca_driver.probe = epca_init_one;
3094
3095         return pci_register_driver(&epca_driver);
3096 }
3097
3098 MODULE_LICENSE("GPL");