linux/drivers/tty/isicom.c
<<
>>
Prefs
   1/*
   2 *      This program is free software; you can redistribute it and/or
   3 *      modify it under the terms of the GNU General Public License
   4 *      as published by the Free Software Foundation; either version
   5 *      2 of the License, or (at your option) any later version.
   6 *
   7 *      Original driver code supplied by Multi-Tech
   8 *
   9 *      Changes
  10 *      1/9/98  alan@lxorguk.ukuu.org.uk
  11 *                                      Merge to 2.0.x kernel tree
  12 *                                      Obtain and use official major/minors
  13 *                                      Loader switched to a misc device
  14 *                                      (fixed range check bug as a side effect)
  15 *                                      Printk clean up
  16 *      9/12/98 alan@lxorguk.ukuu.org.uk
  17 *                                      Rough port to 2.1.x
  18 *
  19 *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  20 *                                      a new unified driver.
  21 *
  22 *      3/9/99  sameer                  Added support for ISI4616 cards.
  23 *
  24 *      16/9/99 sameer                  We do not force RTS low anymore.
  25 *                                      This is to prevent the firmware
  26 *                                      from getting confused.
  27 *
  28 *      26/10/99 sameer                 Cosmetic changes:The driver now
  29 *                                      dumps the Port Count information
  30 *                                      along with I/O address and IRQ.
  31 *
  32 *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
  33 *
  34 *      10/5/00  sameer                 Fixed isicom_shutdown_board()
  35 *                                      to not lower DTR on all the ports
  36 *                                      when the last port on the card is
  37 *                                      closed.
  38 *
  39 *      10/5/00  sameer                 Signal mask setup command added
  40 *                                      to  isicom_setup_port and
  41 *                                      isicom_shutdown_port.
  42 *
  43 *      24/5/00  sameer                 The driver is now SMP aware.
  44 *
  45 *
  46 *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
  47 *
  48 *
  49 *      03/01/01  anil .s               Added support for resetting the
  50 *                                      internal modems on ISI cards.
  51 *
  52 *      08/02/01  anil .s               Upgraded the driver for kernel
  53 *                                      2.4.x
  54 *
  55 *      11/04/01  Kevin                 Fixed firmware load problem with
  56 *                                      ISIHP-4X card
  57 *
  58 *      30/04/01  anil .s               Fixed the remote login through
  59 *                                      ISI port problem. Now the link
  60 *                                      does not go down before password
  61 *                                      prompt.
  62 *
  63 *      03/05/01  anil .s               Fixed the problem with IRQ sharing
  64 *                                      among ISI-PCI cards.
  65 *
  66 *      03/05/01  anil .s               Added support to display the version
  67 *                                      info during insmod as well as module
  68 *                                      listing by lsmod.
  69 *
  70 *      10/05/01  anil .s               Done the modifications to the source
  71 *                                      file and Install script so that the
  72 *                                      same installation can be used for
  73 *                                      2.2.x and 2.4.x kernel.
  74 *
  75 *      06/06/01  anil .s               Now we drop both dtr and rts during
  76 *                                      shutdown_port as well as raise them
  77 *                                      during isicom_config_port.
  78 *
  79 *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  80 *                                      restore_flags on failure in
  81 *                                      isicom_send_break, verify put_user
  82 *                                      result
  83 *
  84 *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
  85 *                                      Baud index extended to 21
  86 *
  87 *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
  88 *                                      Taken care of license warning.
  89 *
  90 *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
  91 *                                      Red Hat Distribution
  92 *
  93 *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
  94 *                                      into a single 2.6 driver
  95 *
  96 *      ***********************************************************
  97 *
  98 *      To use this driver you also need the support package. You
  99 *      can find this in RPM format on
 100 *              ftp://ftp.linux.org.uk/pub/linux/alan
 101 *
 102 *      You can find the original tools for this direct from Multitech
 103 *              ftp://ftp.multitech.com/ISI-Cards/
 104 *
 105 *      Having installed the cards the module options (/etc/modprobe.d/)
 106 *
 107 *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
 108 *
 109 *      Omit those entries for boards you don't have installed.
 110 *
 111 *      TODO
 112 *              Merge testing
 113 *              64-bit verification
 114 */
 115
 116#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 117
 118#include <linux/module.h>
 119#include <linux/firmware.h>
 120#include <linux/kernel.h>
 121#include <linux/tty.h>
 122#include <linux/tty_flip.h>
 123#include <linux/termios.h>
 124#include <linux/fs.h>
 125#include <linux/sched.h>
 126#include <linux/serial.h>
 127#include <linux/mm.h>
 128#include <linux/interrupt.h>
 129#include <linux/timer.h>
 130#include <linux/delay.h>
 131#include <linux/ioport.h>
 132#include <linux/slab.h>
 133
 134#include <linux/uaccess.h>
 135#include <linux/io.h>
 136
 137#include <linux/pci.h>
 138
 139#include <linux/isicom.h>
 140
 141#define InterruptTheCard(base) outw(0, (base) + 0xc)
 142#define ClearInterrupt(base) inw((base) + 0x0a)
 143
 144#ifdef DEBUG
 145#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 146#else
 147#define isicom_paranoia_check(a, b, c) 0
 148#endif
 149
 150static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 151static void __devexit isicom_remove(struct pci_dev *);
 152
 153static struct pci_device_id isicom_pci_tbl[] = {
 154        { PCI_DEVICE(VENDOR_ID, 0x2028) },
 155        { PCI_DEVICE(VENDOR_ID, 0x2051) },
 156        { PCI_DEVICE(VENDOR_ID, 0x2052) },
 157        { PCI_DEVICE(VENDOR_ID, 0x2053) },
 158        { PCI_DEVICE(VENDOR_ID, 0x2054) },
 159        { PCI_DEVICE(VENDOR_ID, 0x2055) },
 160        { PCI_DEVICE(VENDOR_ID, 0x2056) },
 161        { PCI_DEVICE(VENDOR_ID, 0x2057) },
 162        { PCI_DEVICE(VENDOR_ID, 0x2058) },
 163        { 0 }
 164};
 165MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 166
 167static struct pci_driver isicom_driver = {
 168        .name           = "isicom",
 169        .id_table       = isicom_pci_tbl,
 170        .probe          = isicom_probe,
 171        .remove         = __devexit_p(isicom_remove)
 172};
 173
 174static int prev_card = 3;       /*      start servicing isi_card[0]     */
 175static struct tty_driver *isicom_normal;
 176
 177static void isicom_tx(unsigned long _data);
 178static void isicom_start(struct tty_struct *tty);
 179
 180static DEFINE_TIMER(tx, isicom_tx, 0, 0);
 181
 182/*   baud index mappings from linux defns to isi */
 183
 184static signed char linuxb_to_isib[] = {
 185        -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 186};
 187
 188struct  isi_board {
 189        unsigned long           base;
 190        int                     irq;
 191        unsigned char           port_count;
 192        unsigned short          status;
 193        unsigned short          port_status; /* each bit for each port */
 194        unsigned short          shift_count;
 195        struct isi_port         *ports;
 196        signed char             count;
 197        spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 198        unsigned long           flags;
 199        unsigned int            index;
 200};
 201
 202struct  isi_port {
 203        unsigned short          magic;
 204        struct tty_port         port;
 205        u16                     channel;
 206        u16                     status;
 207        struct isi_board        *card;
 208        unsigned char           *xmit_buf;
 209        int                     xmit_head;
 210        int                     xmit_tail;
 211        int                     xmit_cnt;
 212};
 213
 214static struct isi_board isi_card[BOARD_COUNT];
 215static struct isi_port  isi_ports[PORT_COUNT];
 216
 217/*
 218 *      Locking functions for card level locking. We need to own both
 219 *      the kernel lock for the card and have the card in a position that
 220 *      it wants to talk.
 221 */
 222
 223static inline int WaitTillCardIsFree(unsigned long base)
 224{
 225        unsigned int count = 0;
 226        unsigned int a = in_atomic(); /* do we run under spinlock? */
 227
 228        while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 229                if (a)
 230                        mdelay(1);
 231                else
 232                        msleep(1);
 233
 234        return !(inw(base + 0xe) & 0x1);
 235}
 236
 237static int lock_card(struct isi_board *card)
 238{
 239        unsigned long base = card->base;
 240        unsigned int retries, a;
 241
 242        for (retries = 0; retries < 10; retries++) {
 243                spin_lock_irqsave(&card->card_lock, card->flags);
 244                for (a = 0; a < 10; a++) {
 245                        if (inw(base + 0xe) & 0x1)
 246                                return 1;
 247                        udelay(10);
 248                }
 249                spin_unlock_irqrestore(&card->card_lock, card->flags);
 250                msleep(10);
 251        }
 252        pr_warning("Failed to lock Card (0x%lx)\n", card->base);
 253
 254        return 0;       /* Failed to acquire the card! */
 255}
 256
 257static void unlock_card(struct isi_board *card)
 258{
 259        spin_unlock_irqrestore(&card->card_lock, card->flags);
 260}
 261
 262/*
 263 *  ISI Card specific ops ...
 264 */
 265
 266/* card->lock HAS to be held */
 267static void raise_dtr(struct isi_port *port)
 268{
 269        struct isi_board *card = port->card;
 270        unsigned long base = card->base;
 271        u16 channel = port->channel;
 272
 273        if (WaitTillCardIsFree(base))
 274                return;
 275
 276        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 277        outw(0x0504, base);
 278        InterruptTheCard(base);
 279        port->status |= ISI_DTR;
 280}
 281
 282/* card->lock HAS to be held */
 283static inline void drop_dtr(struct isi_port *port)
 284{
 285        struct isi_board *card = port->card;
 286        unsigned long base = card->base;
 287        u16 channel = port->channel;
 288
 289        if (WaitTillCardIsFree(base))
 290                return;
 291
 292        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 293        outw(0x0404, base);
 294        InterruptTheCard(base);
 295        port->status &= ~ISI_DTR;
 296}
 297
 298/* card->lock HAS to be held */
 299static inline void raise_rts(struct isi_port *port)
 300{
 301        struct isi_board *card = port->card;
 302        unsigned long base = card->base;
 303        u16 channel = port->channel;
 304
 305        if (WaitTillCardIsFree(base))
 306                return;
 307
 308        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 309        outw(0x0a04, base);
 310        InterruptTheCard(base);
 311        port->status |= ISI_RTS;
 312}
 313
 314/* card->lock HAS to be held */
 315static inline void drop_rts(struct isi_port *port)
 316{
 317        struct isi_board *card = port->card;
 318        unsigned long base = card->base;
 319        u16 channel = port->channel;
 320
 321        if (WaitTillCardIsFree(base))
 322                return;
 323
 324        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 325        outw(0x0804, base);
 326        InterruptTheCard(base);
 327        port->status &= ~ISI_RTS;
 328}
 329
 330/* card->lock MUST NOT be held */
 331
 332static void isicom_dtr_rts(struct tty_port *port, int on)
 333{
 334        struct isi_port *ip = container_of(port, struct isi_port, port);
 335        struct isi_board *card = ip->card;
 336        unsigned long base = card->base;
 337        u16 channel = ip->channel;
 338
 339        if (!lock_card(card))
 340                return;
 341
 342        if (on) {
 343                outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 344                outw(0x0f04, base);
 345                InterruptTheCard(base);
 346                ip->status |= (ISI_DTR | ISI_RTS);
 347        } else {
 348                outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 349                outw(0x0C04, base);
 350                InterruptTheCard(base);
 351                ip->status &= ~(ISI_DTR | ISI_RTS);
 352        }
 353        unlock_card(card);
 354}
 355
 356/* card->lock HAS to be held */
 357static void drop_dtr_rts(struct isi_port *port)
 358{
 359        struct isi_board *card = port->card;
 360        unsigned long base = card->base;
 361        u16 channel = port->channel;
 362
 363        if (WaitTillCardIsFree(base))
 364                return;
 365
 366        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 367        outw(0x0c04, base);
 368        InterruptTheCard(base);
 369        port->status &= ~(ISI_RTS | ISI_DTR);
 370}
 371
 372/*
 373 *      ISICOM Driver specific routines ...
 374 *
 375 */
 376
 377static inline int __isicom_paranoia_check(struct isi_port const *port,
 378        char *name, const char *routine)
 379{
 380        if (!port) {
 381                pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
 382                           name, routine);
 383                return 1;
 384        }
 385        if (port->magic != ISICOM_MAGIC) {
 386                pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
 387                           name, routine);
 388                return 1;
 389        }
 390
 391        return 0;
 392}
 393
 394/*
 395 *      Transmitter.
 396 *
 397 *      We shovel data into the card buffers on a regular basis. The card
 398 *      will do the rest of the work for us.
 399 */
 400
 401static void isicom_tx(unsigned long _data)
 402{
 403        unsigned long flags, base;
 404        unsigned int retries;
 405        short count = (BOARD_COUNT-1), card;
 406        short txcount, wrd, residue, word_count, cnt;
 407        struct isi_port *port;
 408        struct tty_struct *tty;
 409
 410        /*      find next active board  */
 411        card = (prev_card + 1) & 0x0003;
 412        while (count-- > 0) {
 413                if (isi_card[card].status & BOARD_ACTIVE)
 414                        break;
 415                card = (card + 1) & 0x0003;
 416        }
 417        if (!(isi_card[card].status & BOARD_ACTIVE))
 418                goto sched_again;
 419
 420        prev_card = card;
 421
 422        count = isi_card[card].port_count;
 423        port = isi_card[card].ports;
 424        base = isi_card[card].base;
 425
 426        spin_lock_irqsave(&isi_card[card].card_lock, flags);
 427        for (retries = 0; retries < 100; retries++) {
 428                if (inw(base + 0xe) & 0x1)
 429                        break;
 430                udelay(2);
 431        }
 432        if (retries >= 100)
 433                goto unlock;
 434
 435        tty = tty_port_tty_get(&port->port);
 436        if (tty == NULL)
 437                goto put_unlock;
 438
 439        for (; count > 0; count--, port++) {
 440                /* port not active or tx disabled to force flow control */
 441                if (!(port->port.flags & ASYNC_INITIALIZED) ||
 442                                !(port->status & ISI_TXOK))
 443                        continue;
 444
 445                txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 446                if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 447                        continue;
 448
 449                if (!(inw(base + 0x02) & (1 << port->channel)))
 450                        continue;
 451
 452                pr_debug("txing %d bytes, port%d.\n",
 453                         txcount, port->channel + 1);
 454                outw((port->channel << isi_card[card].shift_count) | txcount,
 455                        base);
 456                residue = NO;
 457                wrd = 0;
 458                while (1) {
 459                        cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 460                                        - port->xmit_tail));
 461                        if (residue == YES) {
 462                                residue = NO;
 463                                if (cnt > 0) {
 464                                        wrd |= (port->port.xmit_buf[port->xmit_tail]
 465                                                                        << 8);
 466                                        port->xmit_tail = (port->xmit_tail + 1)
 467                                                & (SERIAL_XMIT_SIZE - 1);
 468                                        port->xmit_cnt--;
 469                                        txcount--;
 470                                        cnt--;
 471                                        outw(wrd, base);
 472                                } else {
 473                                        outw(wrd, base);
 474                                        break;
 475                                }
 476                        }
 477                        if (cnt <= 0)
 478                                break;
 479                        word_count = cnt >> 1;
 480                        outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 481                        port->xmit_tail = (port->xmit_tail
 482                                + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 483                        txcount -= (word_count << 1);
 484                        port->xmit_cnt -= (word_count << 1);
 485                        if (cnt & 0x0001) {
 486                                residue = YES;
 487                                wrd = port->port.xmit_buf[port->xmit_tail];
 488                                port->xmit_tail = (port->xmit_tail + 1)
 489                                        & (SERIAL_XMIT_SIZE - 1);
 490                                port->xmit_cnt--;
 491                                txcount--;
 492                        }
 493                }
 494
 495                InterruptTheCard(base);
 496                if (port->xmit_cnt <= 0)
 497                        port->status &= ~ISI_TXOK;
 498                if (port->xmit_cnt <= WAKEUP_CHARS)
 499                        tty_wakeup(tty);
 500        }
 501
 502put_unlock:
 503        tty_kref_put(tty);
 504unlock:
 505        spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 506        /*      schedule another tx for hopefully in about 10ms */
 507sched_again:
 508        mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 509}
 510
 511/*
 512 *      Main interrupt handler routine
 513 */
 514
 515static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 516{
 517        struct isi_board *card = dev_id;
 518        struct isi_port *port;
 519        struct tty_struct *tty;
 520        unsigned long base;
 521        u16 header, word_count, count, channel;
 522        short byte_count;
 523        unsigned char *rp;
 524
 525        if (!card || !(card->status & FIRMWARE_LOADED))
 526                return IRQ_NONE;
 527
 528        base = card->base;
 529
 530        /* did the card interrupt us? */
 531        if (!(inw(base + 0x0e) & 0x02))
 532                return IRQ_NONE;
 533
 534        spin_lock(&card->card_lock);
 535
 536        /*
 537         * disable any interrupts from the PCI card and lower the
 538         * interrupt line
 539         */
 540        outw(0x8000, base+0x04);
 541        ClearInterrupt(base);
 542
 543        inw(base);              /* get the dummy word out */
 544        header = inw(base);
 545        channel = (header & 0x7800) >> card->shift_count;
 546        byte_count = header & 0xff;
 547
 548        if (channel + 1 > card->port_count) {
 549                pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
 550                           __func__, base, channel+1);
 551                outw(0x0000, base+0x04); /* enable interrupts */
 552                spin_unlock(&card->card_lock);
 553                return IRQ_HANDLED;
 554        }
 555        port = card->ports + channel;
 556        if (!(port->port.flags & ASYNC_INITIALIZED)) {
 557                outw(0x0000, base+0x04); /* enable interrupts */
 558                spin_unlock(&card->card_lock);
 559                return IRQ_HANDLED;
 560        }
 561
 562        tty = tty_port_tty_get(&port->port);
 563        if (tty == NULL) {
 564                word_count = byte_count >> 1;
 565                while (byte_count > 1) {
 566                        inw(base);
 567                        byte_count -= 2;
 568                }
 569                if (byte_count & 0x01)
 570                        inw(base);
 571                outw(0x0000, base+0x04); /* enable interrupts */
 572                spin_unlock(&card->card_lock);
 573                return IRQ_HANDLED;
 574        }
 575
 576        if (header & 0x8000) {          /* Status Packet */
 577                header = inw(base);
 578                switch (header & 0xff) {
 579                case 0: /* Change in EIA signals */
 580                        if (port->port.flags & ASYNC_CHECK_CD) {
 581                                if (port->status & ISI_DCD) {
 582                                        if (!(header & ISI_DCD)) {
 583                                        /* Carrier has been lost  */
 584                                                pr_debug("%s: DCD->low.\n",
 585                                                         __func__);
 586                                                port->status &= ~ISI_DCD;
 587                                                tty_hangup(tty);
 588                                        }
 589                                } else if (header & ISI_DCD) {
 590                                /* Carrier has been detected */
 591                                        pr_debug("%s: DCD->high.\n",
 592                                                __func__);
 593                                        port->status |= ISI_DCD;
 594                                        wake_up_interruptible(&port->port.open_wait);
 595                                }
 596                        } else {
 597                                if (header & ISI_DCD)
 598                                        port->status |= ISI_DCD;
 599                                else
 600                                        port->status &= ~ISI_DCD;
 601                        }
 602
 603                        if (tty_port_cts_enabled(&port->port)) {
 604                                if (tty->hw_stopped) {
 605                                        if (header & ISI_CTS) {
 606                                                port->port.tty->hw_stopped = 0;
 607                                                /* start tx ing */
 608                                                port->status |= (ISI_TXOK
 609                                                        | ISI_CTS);
 610                                                tty_wakeup(tty);
 611                                        }
 612                                } else if (!(header & ISI_CTS)) {
 613                                        tty->hw_stopped = 1;
 614                                        /* stop tx ing */
 615                                        port->status &= ~(ISI_TXOK | ISI_CTS);
 616                                }
 617                        } else {
 618                                if (header & ISI_CTS)
 619                                        port->status |= ISI_CTS;
 620                                else
 621                                        port->status &= ~ISI_CTS;
 622                        }
 623
 624                        if (header & ISI_DSR)
 625                                port->status |= ISI_DSR;
 626                        else
 627                                port->status &= ~ISI_DSR;
 628
 629                        if (header & ISI_RI)
 630                                port->status |= ISI_RI;
 631                        else
 632                                port->status &= ~ISI_RI;
 633
 634                        break;
 635
 636                case 1: /* Received Break !!! */
 637                        tty_insert_flip_char(tty, 0, TTY_BREAK);
 638                        if (port->port.flags & ASYNC_SAK)
 639                                do_SAK(tty);
 640                        tty_flip_buffer_push(tty);
 641                        break;
 642
 643                case 2: /* Statistics            */
 644                        pr_debug("%s: stats!!!\n", __func__);
 645                        break;
 646
 647                default:
 648                        pr_debug("%s: Unknown code in status packet.\n",
 649                                 __func__);
 650                        break;
 651                }
 652        } else {                                /* Data   Packet */
 653
 654                count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
 655                pr_debug("%s: Can rx %d of %d bytes.\n",
 656                         __func__, count, byte_count);
 657                word_count = count >> 1;
 658                insw(base, rp, word_count);
 659                byte_count -= (word_count << 1);
 660                if (count & 0x0001) {
 661                        tty_insert_flip_char(tty,  inw(base) & 0xff,
 662                                TTY_NORMAL);
 663                        byte_count -= 2;
 664                }
 665                if (byte_count > 0) {
 666                        pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
 667                                 __func__, base, channel + 1);
 668                /* drain out unread xtra data */
 669                while (byte_count > 0) {
 670                                inw(base);
 671                                byte_count -= 2;
 672                        }
 673                }
 674                tty_flip_buffer_push(tty);
 675        }
 676        outw(0x0000, base+0x04); /* enable interrupts */
 677        spin_unlock(&card->card_lock);
 678        tty_kref_put(tty);
 679
 680        return IRQ_HANDLED;
 681}
 682
 683static void isicom_config_port(struct tty_struct *tty)
 684{
 685        struct isi_port *port = tty->driver_data;
 686        struct isi_board *card = port->card;
 687        unsigned long baud;
 688        unsigned long base = card->base;
 689        u16 channel_setup, channel = port->channel,
 690                shift_count = card->shift_count;
 691        unsigned char flow_ctrl;
 692
 693        /* FIXME: Switch to new tty baud API */
 694        baud = C_BAUD(tty);
 695        if (baud & CBAUDEX) {
 696                baud &= ~CBAUDEX;
 697
 698                /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 699                 *  then the card is programmed for 57.6Kbps or 115Kbps
 700                 *  respectively.
 701                 */
 702
 703                /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 704                if (baud < 1 || baud > 4)
 705                        tty->termios.c_cflag &= ~CBAUDEX;
 706                else
 707                        baud += 15;
 708        }
 709        if (baud == 15) {
 710
 711                /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 712                 *  by the set_serial_info ioctl ... this is done by
 713                 *  the 'setserial' utility.
 714                 */
 715
 716                if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 717                        baud++; /*  57.6 Kbps */
 718                if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 719                        baud += 2; /*  115  Kbps */
 720                if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 721                        baud += 3; /* 230 kbps*/
 722                if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 723                        baud += 4; /* 460 kbps*/
 724        }
 725        if (linuxb_to_isib[baud] == -1) {
 726                /* hang up */
 727                drop_dtr(port);
 728                return;
 729        } else
 730                raise_dtr(port);
 731
 732        if (WaitTillCardIsFree(base) == 0) {
 733                outw(0x8000 | (channel << shift_count) | 0x03, base);
 734                outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 735                channel_setup = 0;
 736                switch (C_CSIZE(tty)) {
 737                case CS5:
 738                        channel_setup |= ISICOM_CS5;
 739                        break;
 740                case CS6:
 741                        channel_setup |= ISICOM_CS6;
 742                        break;
 743                case CS7:
 744                        channel_setup |= ISICOM_CS7;
 745                        break;
 746                case CS8:
 747                        channel_setup |= ISICOM_CS8;
 748                        break;
 749                }
 750
 751                if (C_CSTOPB(tty))
 752                        channel_setup |= ISICOM_2SB;
 753                if (C_PARENB(tty)) {
 754                        channel_setup |= ISICOM_EVPAR;
 755                        if (C_PARODD(tty))
 756                                channel_setup |= ISICOM_ODPAR;
 757                }
 758                outw(channel_setup, base);
 759                InterruptTheCard(base);
 760        }
 761        if (C_CLOCAL(tty))
 762                port->port.flags &= ~ASYNC_CHECK_CD;
 763        else
 764                port->port.flags |= ASYNC_CHECK_CD;
 765
 766        /* flow control settings ...*/
 767        flow_ctrl = 0;
 768        port->port.flags &= ~ASYNC_CTS_FLOW;
 769        if (C_CRTSCTS(tty)) {
 770                port->port.flags |= ASYNC_CTS_FLOW;
 771                flow_ctrl |= ISICOM_CTSRTS;
 772        }
 773        if (I_IXON(tty))
 774                flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 775        if (I_IXOFF(tty))
 776                flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 777
 778        if (WaitTillCardIsFree(base) == 0) {
 779                outw(0x8000 | (channel << shift_count) | 0x04, base);
 780                outw(flow_ctrl << 8 | 0x05, base);
 781                outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 782                InterruptTheCard(base);
 783        }
 784
 785        /*      rx enabled -> enable port for rx on the card    */
 786        if (C_CREAD(tty)) {
 787                card->port_status |= (1 << channel);
 788                outw(card->port_status, base + 0x02);
 789        }
 790}
 791
 792/* open et all */
 793
 794static inline void isicom_setup_board(struct isi_board *bp)
 795{
 796        int channel;
 797        struct isi_port *port;
 798
 799        bp->count++;
 800        if (!(bp->status & BOARD_INIT)) {
 801                port = bp->ports;
 802                for (channel = 0; channel < bp->port_count; channel++, port++)
 803                        drop_dtr_rts(port);
 804        }
 805        bp->status |= BOARD_ACTIVE | BOARD_INIT;
 806}
 807
 808/* Activate and thus setup board are protected from races against shutdown
 809   by the tty_port mutex */
 810
 811static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 812{
 813        struct isi_port *port = container_of(tport, struct isi_port, port);
 814        struct isi_board *card = port->card;
 815        unsigned long flags;
 816
 817        if (tty_port_alloc_xmit_buf(tport) < 0)
 818                return -ENOMEM;
 819
 820        spin_lock_irqsave(&card->card_lock, flags);
 821        isicom_setup_board(card);
 822
 823        port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 824
 825        /*      discard any residual data       */
 826        if (WaitTillCardIsFree(card->base) == 0) {
 827                outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 828                                card->base);
 829                outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 830                InterruptTheCard(card->base);
 831        }
 832        isicom_config_port(tty);
 833        spin_unlock_irqrestore(&card->card_lock, flags);
 834
 835        return 0;
 836}
 837
 838static int isicom_carrier_raised(struct tty_port *port)
 839{
 840        struct isi_port *ip = container_of(port, struct isi_port, port);
 841        return (ip->status & ISI_DCD)?1 : 0;
 842}
 843
 844static struct tty_port *isicom_find_port(struct tty_struct *tty)
 845{
 846        struct isi_port *port;
 847        struct isi_board *card;
 848        unsigned int board;
 849        int line = tty->index;
 850
 851        board = BOARD(line);
 852        card = &isi_card[board];
 853
 854        if (!(card->status & FIRMWARE_LOADED))
 855                return NULL;
 856
 857        /*  open on a port greater than the port count for the card !!! */
 858        if (line > ((board * 16) + card->port_count - 1))
 859                return NULL;
 860
 861        port = &isi_ports[line];
 862        if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 863                return NULL;
 864
 865        return &port->port;
 866}
 867
 868static int isicom_open(struct tty_struct *tty, struct file *filp)
 869{
 870        struct isi_port *port;
 871        struct tty_port *tport;
 872
 873        tport = isicom_find_port(tty);
 874        if (tport == NULL)
 875                return -ENODEV;
 876        port = container_of(tport, struct isi_port, port);
 877
 878        tty->driver_data = port;
 879        return tty_port_open(tport, tty, filp);
 880}
 881
 882/* close et all */
 883
 884/* card->lock HAS to be held */
 885static void isicom_shutdown_port(struct isi_port *port)
 886{
 887        struct isi_board *card = port->card;
 888
 889        if (--card->count < 0) {
 890                pr_debug("%s: bad board(0x%lx) count %d.\n",
 891                         __func__, card->base, card->count);
 892                card->count = 0;
 893        }
 894        /* last port was closed, shutdown that board too */
 895        if (!card->count)
 896                card->status &= BOARD_ACTIVE;
 897}
 898
 899static void isicom_flush_buffer(struct tty_struct *tty)
 900{
 901        struct isi_port *port = tty->driver_data;
 902        struct isi_board *card = port->card;
 903        unsigned long flags;
 904
 905        if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 906                return;
 907
 908        spin_lock_irqsave(&card->card_lock, flags);
 909        port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 910        spin_unlock_irqrestore(&card->card_lock, flags);
 911
 912        tty_wakeup(tty);
 913}
 914
 915static void isicom_shutdown(struct tty_port *port)
 916{
 917        struct isi_port *ip = container_of(port, struct isi_port, port);
 918        struct isi_board *card = ip->card;
 919        unsigned long flags;
 920
 921        /* indicate to the card that no more data can be received
 922           on this port */
 923        spin_lock_irqsave(&card->card_lock, flags);
 924        card->port_status &= ~(1 << ip->channel);
 925        outw(card->port_status, card->base + 0x02);
 926        isicom_shutdown_port(ip);
 927        spin_unlock_irqrestore(&card->card_lock, flags);
 928        tty_port_free_xmit_buf(port);
 929}
 930
 931static void isicom_close(struct tty_struct *tty, struct file *filp)
 932{
 933        struct isi_port *ip = tty->driver_data;
 934        struct tty_port *port;
 935
 936        if (ip == NULL)
 937                return;
 938
 939        port = &ip->port;
 940        if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 941                return;
 942        tty_port_close(port, tty, filp);
 943}
 944
 945/* write et all */
 946static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 947        int count)
 948{
 949        struct isi_port *port = tty->driver_data;
 950        struct isi_board *card = port->card;
 951        unsigned long flags;
 952        int cnt, total = 0;
 953
 954        if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 955                return 0;
 956
 957        spin_lock_irqsave(&card->card_lock, flags);
 958
 959        while (1) {
 960                cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 961                                - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 962                if (cnt <= 0)
 963                        break;
 964
 965                memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 966                port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 967                        - 1);
 968                port->xmit_cnt += cnt;
 969                buf += cnt;
 970                count -= cnt;
 971                total += cnt;
 972        }
 973        if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 974                port->status |= ISI_TXOK;
 975        spin_unlock_irqrestore(&card->card_lock, flags);
 976        return total;
 977}
 978
 979/* put_char et all */
 980static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 981{
 982        struct isi_port *port = tty->driver_data;
 983        struct isi_board *card = port->card;
 984        unsigned long flags;
 985
 986        if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 987                return 0;
 988
 989        spin_lock_irqsave(&card->card_lock, flags);
 990        if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 991                spin_unlock_irqrestore(&card->card_lock, flags);
 992                return 0;
 993        }
 994
 995        port->port.xmit_buf[port->xmit_head++] = ch;
 996        port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 997        port->xmit_cnt++;
 998        spin_unlock_irqrestore(&card->card_lock, flags);
 999        return 1;
1000}
1001
1002/* flush_chars et all */
1003static void isicom_flush_chars(struct tty_struct *tty)
1004{
1005        struct isi_port *port = tty->driver_data;
1006
1007        if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1008                return;
1009
1010        if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1011                        !port->port.xmit_buf)
1012                return;
1013
1014        /* this tells the transmitter to consider this port for
1015           data output to the card ... that's the best we can do. */
1016        port->status |= ISI_TXOK;
1017}
1018
1019/* write_room et all */
1020static int isicom_write_room(struct tty_struct *tty)
1021{
1022        struct isi_port *port = tty->driver_data;
1023        int free;
1024
1025        if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1026                return 0;
1027
1028        free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1029        if (free < 0)
1030                free = 0;
1031        return free;
1032}
1033
1034/* chars_in_buffer et all */
1035static int isicom_chars_in_buffer(struct tty_struct *tty)
1036{
1037        struct isi_port *port = tty->driver_data;
1038        if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1039                return 0;
1040        return port->xmit_cnt;
1041}
1042
1043/* ioctl et all */
1044static int isicom_send_break(struct tty_struct *tty, int length)
1045{
1046        struct isi_port *port = tty->driver_data;
1047        struct isi_board *card = port->card;
1048        unsigned long base = card->base;
1049
1050        if (length == -1)
1051                return -EOPNOTSUPP;
1052
1053        if (!lock_card(card))
1054                return -EINVAL;
1055
1056        outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1057        outw((length & 0xff) << 8 | 0x00, base);
1058        outw((length & 0xff00), base);
1059        InterruptTheCard(base);
1060
1061        unlock_card(card);
1062        return 0;
1063}
1064
1065static int isicom_tiocmget(struct tty_struct *tty)
1066{
1067        struct isi_port *port = tty->driver_data;
1068        /* just send the port status */
1069        u16 status = port->status;
1070
1071        if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1072                return -ENODEV;
1073
1074        return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1075                ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1076                ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1077                ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1078                ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1079                ((status & ISI_RI ) ? TIOCM_RI  : 0);
1080}
1081
1082static int isicom_tiocmset(struct tty_struct *tty,
1083                                        unsigned int set, unsigned int clear)
1084{
1085        struct isi_port *port = tty->driver_data;
1086        unsigned long flags;
1087
1088        if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1089                return -ENODEV;
1090
1091        spin_lock_irqsave(&port->card->card_lock, flags);
1092        if (set & TIOCM_RTS)
1093                raise_rts(port);
1094        if (set & TIOCM_DTR)
1095                raise_dtr(port);
1096
1097        if (clear & TIOCM_RTS)
1098                drop_rts(port);
1099        if (clear & TIOCM_DTR)
1100                drop_dtr(port);
1101        spin_unlock_irqrestore(&port->card->card_lock, flags);
1102
1103        return 0;
1104}
1105
1106static int isicom_set_serial_info(struct tty_struct *tty,
1107                                        struct serial_struct __user *info)
1108{
1109        struct isi_port *port = tty->driver_data;
1110        struct serial_struct newinfo;
1111        int reconfig_port;
1112
1113        if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1114                return -EFAULT;
1115
1116        mutex_lock(&port->port.mutex);
1117        reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1118                (newinfo.flags & ASYNC_SPD_MASK));
1119
1120        if (!capable(CAP_SYS_ADMIN)) {
1121                if ((newinfo.close_delay != port->port.close_delay) ||
1122                                (newinfo.closing_wait != port->port.closing_wait) ||
1123                                ((newinfo.flags & ~ASYNC_USR_MASK) !=
1124                                (port->port.flags & ~ASYNC_USR_MASK))) {
1125                        mutex_unlock(&port->port.mutex);
1126                        return -EPERM;
1127                }
1128                port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1129                                (newinfo.flags & ASYNC_USR_MASK));
1130        } else {
1131                port->port.close_delay = newinfo.close_delay;
1132                port->port.closing_wait = newinfo.closing_wait;
1133                port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1134                                (newinfo.flags & ASYNC_FLAGS));
1135        }
1136        if (reconfig_port) {
1137                unsigned long flags;
1138                spin_lock_irqsave(&port->card->card_lock, flags);
1139                isicom_config_port(tty);
1140                spin_unlock_irqrestore(&port->card->card_lock, flags);
1141        }
1142        mutex_unlock(&port->port.mutex);
1143        return 0;
1144}
1145
1146static int isicom_get_serial_info(struct isi_port *port,
1147        struct serial_struct __user *info)
1148{
1149        struct serial_struct out_info;
1150
1151        mutex_lock(&port->port.mutex);
1152        memset(&out_info, 0, sizeof(out_info));
1153/*      out_info.type = ? */
1154        out_info.line = port - isi_ports;
1155        out_info.port = port->card->base;
1156        out_info.irq = port->card->irq;
1157        out_info.flags = port->port.flags;
1158/*      out_info.baud_base = ? */
1159        out_info.close_delay = port->port.close_delay;
1160        out_info.closing_wait = port->port.closing_wait;
1161        mutex_unlock(&port->port.mutex);
1162        if (copy_to_user(info, &out_info, sizeof(out_info)))
1163                return -EFAULT;
1164        return 0;
1165}
1166
1167static int isicom_ioctl(struct tty_struct *tty,
1168        unsigned int cmd, unsigned long arg)
1169{
1170        struct isi_port *port = tty->driver_data;
1171        void __user *argp = (void __user *)arg;
1172
1173        if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1174                return -ENODEV;
1175
1176        switch (cmd) {
1177        case TIOCGSERIAL:
1178                return isicom_get_serial_info(port, argp);
1179
1180        case TIOCSSERIAL:
1181                return isicom_set_serial_info(tty, argp);
1182
1183        default:
1184                return -ENOIOCTLCMD;
1185        }
1186        return 0;
1187}
1188
1189/* set_termios et all */
1190static void isicom_set_termios(struct tty_struct *tty,
1191        struct ktermios *old_termios)
1192{
1193        struct isi_port *port = tty->driver_data;
1194        unsigned long flags;
1195
1196        if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1197                return;
1198
1199        if (tty->termios.c_cflag == old_termios->c_cflag &&
1200                        tty->termios.c_iflag == old_termios->c_iflag)
1201                return;
1202
1203        spin_lock_irqsave(&port->card->card_lock, flags);
1204        isicom_config_port(tty);
1205        spin_unlock_irqrestore(&port->card->card_lock, flags);
1206
1207        if ((old_termios->c_cflag & CRTSCTS) &&
1208                        !(tty->termios.c_cflag & CRTSCTS)) {
1209                tty->hw_stopped = 0;
1210                isicom_start(tty);
1211        }
1212}
1213
1214/* throttle et all */
1215static void isicom_throttle(struct tty_struct *tty)
1216{
1217        struct isi_port *port = tty->driver_data;
1218        struct isi_board *card = port->card;
1219
1220        if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1221                return;
1222
1223        /* tell the card that this port cannot handle any more data for now */
1224        card->port_status &= ~(1 << port->channel);
1225        outw(card->port_status, card->base + 0x02);
1226}
1227
1228/* unthrottle et all */
1229static void isicom_unthrottle(struct tty_struct *tty)
1230{
1231        struct isi_port *port = tty->driver_data;
1232        struct isi_board *card = port->card;
1233
1234        if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1235                return;
1236
1237        /* tell the card that this port is ready to accept more data */
1238        card->port_status |= (1 << port->channel);
1239        outw(card->port_status, card->base + 0x02);
1240}
1241
1242/* stop et all */
1243static void isicom_stop(struct tty_struct *tty)
1244{
1245        struct isi_port *port = tty->driver_data;
1246
1247        if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1248                return;
1249
1250        /* this tells the transmitter not to consider this port for
1251           data output to the card. */
1252        port->status &= ~ISI_TXOK;
1253}
1254
1255/* start et all */
1256static void isicom_start(struct tty_struct *tty)
1257{
1258        struct isi_port *port = tty->driver_data;
1259
1260        if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1261                return;
1262
1263        /* this tells the transmitter to consider this port for
1264           data output to the card. */
1265        port->status |= ISI_TXOK;
1266}
1267
1268static void isicom_hangup(struct tty_struct *tty)
1269{
1270        struct isi_port *port = tty->driver_data;
1271
1272        if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1273                return;
1274        tty_port_hangup(&port->port);
1275}
1276
1277
1278/*
1279 * Driver init and deinit functions
1280 */
1281
1282static const struct tty_operations isicom_ops = {
1283        .open                   = isicom_open,
1284        .close                  = isicom_close,
1285        .write                  = isicom_write,
1286        .put_char               = isicom_put_char,
1287        .flush_chars            = isicom_flush_chars,
1288        .write_room             = isicom_write_room,
1289        .chars_in_buffer        = isicom_chars_in_buffer,
1290        .ioctl                  = isicom_ioctl,
1291        .set_termios            = isicom_set_termios,
1292        .throttle               = isicom_throttle,
1293        .unthrottle             = isicom_unthrottle,
1294        .stop                   = isicom_stop,
1295        .start                  = isicom_start,
1296        .hangup                 = isicom_hangup,
1297        .flush_buffer           = isicom_flush_buffer,
1298        .tiocmget               = isicom_tiocmget,
1299        .tiocmset               = isicom_tiocmset,
1300        .break_ctl              = isicom_send_break,
1301};
1302
1303static const struct tty_port_operations isicom_port_ops = {
1304        .carrier_raised         = isicom_carrier_raised,
1305        .dtr_rts                = isicom_dtr_rts,
1306        .activate               = isicom_activate,
1307        .shutdown               = isicom_shutdown,
1308};
1309
1310static int __devinit reset_card(struct pci_dev *pdev,
1311        const unsigned int card, unsigned int *signature)
1312{
1313        struct isi_board *board = pci_get_drvdata(pdev);
1314        unsigned long base = board->base;
1315        unsigned int sig, portcount = 0;
1316        int retval = 0;
1317
1318        dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1319                base);
1320
1321        inw(base + 0x8);
1322
1323        msleep(10);
1324
1325        outw(0, base + 0x8); /* Reset */
1326
1327        msleep(1000);
1328
1329        sig = inw(base + 0x4) & 0xff;
1330
1331        if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1332                        sig != 0xee) {
1333                dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1334                        "bad I/O Port Address 0x%lx).\n", card + 1, base);
1335                dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1336                retval = -EIO;
1337                goto end;
1338        }
1339
1340        msleep(10);
1341
1342        portcount = inw(base + 0x2);
1343        if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1344                                portcount != 8 && portcount != 16)) {
1345                dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1346                        card + 1);
1347                retval = -EIO;
1348                goto end;
1349        }
1350
1351        switch (sig) {
1352        case 0xa5:
1353        case 0xbb:
1354        case 0xdd:
1355                board->port_count = (portcount == 4) ? 4 : 8;
1356                board->shift_count = 12;
1357                break;
1358        case 0xcc:
1359        case 0xee:
1360                board->port_count = 16;
1361                board->shift_count = 11;
1362                break;
1363        }
1364        dev_info(&pdev->dev, "-Done\n");
1365        *signature = sig;
1366
1367end:
1368        return retval;
1369}
1370
1371static int __devinit load_firmware(struct pci_dev *pdev,
1372        const unsigned int index, const unsigned int signature)
1373{
1374        struct isi_board *board = pci_get_drvdata(pdev);
1375        const struct firmware *fw;
1376        unsigned long base = board->base;
1377        unsigned int a;
1378        u16 word_count, status;
1379        int retval = -EIO;
1380        char *name;
1381        u8 *data;
1382
1383        struct stframe {
1384                u16     addr;
1385                u16     count;
1386                u8      data[0];
1387        } *frame;
1388
1389        switch (signature) {
1390        case 0xa5:
1391                name = "isi608.bin";
1392                break;
1393        case 0xbb:
1394                name = "isi608em.bin";
1395                break;
1396        case 0xcc:
1397                name = "isi616em.bin";
1398                break;
1399        case 0xdd:
1400                name = "isi4608.bin";
1401                break;
1402        case 0xee:
1403                name = "isi4616.bin";
1404                break;
1405        default:
1406                dev_err(&pdev->dev, "Unknown signature.\n");
1407                goto end;
1408        }
1409
1410        retval = request_firmware(&fw, name, &pdev->dev);
1411        if (retval)
1412                goto end;
1413
1414        retval = -EIO;
1415
1416        for (frame = (struct stframe *)fw->data;
1417                        frame < (struct stframe *)(fw->data + fw->size);
1418                        frame = (struct stframe *)((u8 *)(frame + 1) +
1419                                frame->count)) {
1420                if (WaitTillCardIsFree(base))
1421                        goto errrelfw;
1422
1423                outw(0xf0, base);       /* start upload sequence */
1424                outw(0x00, base);
1425                outw(frame->addr, base); /* lsb of address */
1426
1427                word_count = frame->count / 2 + frame->count % 2;
1428                outw(word_count, base);
1429                InterruptTheCard(base);
1430
1431                udelay(100); /* 0x2f */
1432
1433                if (WaitTillCardIsFree(base))
1434                        goto errrelfw;
1435
1436                status = inw(base + 0x4);
1437                if (status != 0) {
1438                        dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1439                                 "Address:0x%x\n"
1440                                 "Count:0x%x\n"
1441                                 "Status:0x%x\n",
1442                                 index + 1, frame->addr, frame->count, status);
1443                        goto errrelfw;
1444                }
1445                outsw(base, frame->data, word_count);
1446
1447                InterruptTheCard(base);
1448
1449                udelay(50); /* 0x0f */
1450
1451                if (WaitTillCardIsFree(base))
1452                        goto errrelfw;
1453
1454                status = inw(base + 0x4);
1455                if (status != 0) {
1456                        dev_err(&pdev->dev, "Card%d got out of sync.Card "
1457                                "Status:0x%x\n", index + 1, status);
1458                        goto errrelfw;
1459                }
1460        }
1461
1462/* XXX: should we test it by reading it back and comparing with original like
1463 * in load firmware package? */
1464        for (frame = (struct stframe *)fw->data;
1465                        frame < (struct stframe *)(fw->data + fw->size);
1466                        frame = (struct stframe *)((u8 *)(frame + 1) +
1467                                frame->count)) {
1468                if (WaitTillCardIsFree(base))
1469                        goto errrelfw;
1470
1471                outw(0xf1, base); /* start download sequence */
1472                outw(0x00, base);
1473                outw(frame->addr, base); /* lsb of address */
1474
1475                word_count = (frame->count >> 1) + frame->count % 2;
1476                outw(word_count + 1, base);
1477                InterruptTheCard(base);
1478
1479                udelay(50); /* 0xf */
1480
1481                if (WaitTillCardIsFree(base))
1482                        goto errrelfw;
1483
1484                status = inw(base + 0x4);
1485                if (status != 0) {
1486                        dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1487                                 "Address:0x%x\n"
1488                                 "Count:0x%x\n"
1489                                 "Status: 0x%x\n",
1490                                 index + 1, frame->addr, frame->count, status);
1491                        goto errrelfw;
1492                }
1493
1494                data = kmalloc(word_count * 2, GFP_KERNEL);
1495                if (data == NULL) {
1496                        dev_err(&pdev->dev, "Card%d, firmware upload "
1497                                "failed, not enough memory\n", index + 1);
1498                        goto errrelfw;
1499                }
1500                inw(base);
1501                insw(base, data, word_count);
1502                InterruptTheCard(base);
1503
1504                for (a = 0; a < frame->count; a++)
1505                        if (data[a] != frame->data[a]) {
1506                                kfree(data);
1507                                dev_err(&pdev->dev, "Card%d, firmware upload "
1508                                        "failed\n", index + 1);
1509                                goto errrelfw;
1510                        }
1511                kfree(data);
1512
1513                udelay(50); /* 0xf */
1514
1515                if (WaitTillCardIsFree(base))
1516                        goto errrelfw;
1517
1518                status = inw(base + 0x4);
1519                if (status != 0) {
1520                        dev_err(&pdev->dev, "Card%d verify got out of sync. "
1521                                "Card Status:0x%x\n", index + 1, status);
1522                        goto errrelfw;
1523                }
1524        }
1525
1526        /* xfer ctrl */
1527        if (WaitTillCardIsFree(base))
1528                goto errrelfw;
1529
1530        outw(0xf2, base);
1531        outw(0x800, base);
1532        outw(0x0, base);
1533        outw(0x0, base);
1534        InterruptTheCard(base);
1535        outw(0x0, base + 0x4); /* for ISI4608 cards */
1536
1537        board->status |= FIRMWARE_LOADED;
1538        retval = 0;
1539
1540errrelfw:
1541        release_firmware(fw);
1542end:
1543        return retval;
1544}
1545
1546/*
1547 *      Insmod can set static symbols so keep these static
1548 */
1549static unsigned int card_count;
1550
1551static int __devinit isicom_probe(struct pci_dev *pdev,
1552        const struct pci_device_id *ent)
1553{
1554        unsigned int uninitialized_var(signature), index;
1555        int retval = -EPERM;
1556        struct isi_board *board = NULL;
1557
1558        if (card_count >= BOARD_COUNT)
1559                goto err;
1560
1561        retval = pci_enable_device(pdev);
1562        if (retval) {
1563                dev_err(&pdev->dev, "failed to enable\n");
1564                goto err;
1565        }
1566
1567        dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1568
1569        /* allot the first empty slot in the array */
1570        for (index = 0; index < BOARD_COUNT; index++) {
1571                if (isi_card[index].base == 0) {
1572                        board = &isi_card[index];
1573                        break;
1574                }
1575        }
1576        if (index == BOARD_COUNT) {
1577                retval = -ENODEV;
1578                goto err_disable;
1579        }
1580
1581        board->index = index;
1582        board->base = pci_resource_start(pdev, 3);
1583        board->irq = pdev->irq;
1584        card_count++;
1585
1586        pci_set_drvdata(pdev, board);
1587
1588        retval = pci_request_region(pdev, 3, ISICOM_NAME);
1589        if (retval) {
1590                dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1591                        "will be disabled.\n", board->base, board->base + 15,
1592                        index + 1);
1593                retval = -EBUSY;
1594                goto errdec;
1595        }
1596
1597        retval = request_irq(board->irq, isicom_interrupt,
1598                        IRQF_SHARED, ISICOM_NAME, board);
1599        if (retval < 0) {
1600                dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1601                        "Card%d will be disabled.\n", board->irq, index + 1);
1602                goto errunrr;
1603        }
1604
1605        retval = reset_card(pdev, index, &signature);
1606        if (retval < 0)
1607                goto errunri;
1608
1609        retval = load_firmware(pdev, index, signature);
1610        if (retval < 0)
1611                goto errunri;
1612
1613        for (index = 0; index < board->port_count; index++)
1614                tty_port_register_device(&board->ports[index].port,
1615                                isicom_normal, board->index * 16 + index,
1616                                &pdev->dev);
1617
1618        return 0;
1619
1620errunri:
1621        free_irq(board->irq, board);
1622errunrr:
1623        pci_release_region(pdev, 3);
1624errdec:
1625        board->base = 0;
1626        card_count--;
1627err_disable:
1628        pci_disable_device(pdev);
1629err:
1630        return retval;
1631}
1632
1633static void __devexit isicom_remove(struct pci_dev *pdev)
1634{
1635        struct isi_board *board = pci_get_drvdata(pdev);
1636        unsigned int i;
1637
1638        for (i = 0; i < board->port_count; i++)
1639                tty_unregister_device(isicom_normal, board->index * 16 + i);
1640
1641        free_irq(board->irq, board);
1642        pci_release_region(pdev, 3);
1643        board->base = 0;
1644        card_count--;
1645        pci_disable_device(pdev);
1646}
1647
1648static int __init isicom_init(void)
1649{
1650        int retval, idx, channel;
1651        struct isi_port *port;
1652
1653        for (idx = 0; idx < BOARD_COUNT; idx++) {
1654                port = &isi_ports[idx * 16];
1655                isi_card[idx].ports = port;
1656                spin_lock_init(&isi_card[idx].card_lock);
1657                for (channel = 0; channel < 16; channel++, port++) {
1658                        tty_port_init(&port->port);
1659                        port->port.ops = &isicom_port_ops;
1660                        port->magic = ISICOM_MAGIC;
1661                        port->card = &isi_card[idx];
1662                        port->channel = channel;
1663                        port->port.close_delay = 50 * HZ/100;
1664                        port->port.closing_wait = 3000 * HZ/100;
1665                        port->status = 0;
1666                        /*  . . .  */
1667                }
1668                isi_card[idx].base = 0;
1669                isi_card[idx].irq = 0;
1670        }
1671
1672        /* tty driver structure initialization */
1673        isicom_normal = alloc_tty_driver(PORT_COUNT);
1674        if (!isicom_normal) {
1675                retval = -ENOMEM;
1676                goto error;
1677        }
1678
1679        isicom_normal->name                     = "ttyM";
1680        isicom_normal->major                    = ISICOM_NMAJOR;
1681        isicom_normal->minor_start              = 0;
1682        isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1683        isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1684        isicom_normal->init_termios             = tty_std_termios;
1685        isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1686                CLOCAL;
1687        isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1688                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1689        tty_set_operations(isicom_normal, &isicom_ops);
1690
1691        retval = tty_register_driver(isicom_normal);
1692        if (retval) {
1693                pr_debug("Couldn't register the dialin driver\n");
1694                goto err_puttty;
1695        }
1696
1697        retval = pci_register_driver(&isicom_driver);
1698        if (retval < 0) {
1699                pr_err("Unable to register pci driver.\n");
1700                goto err_unrtty;
1701        }
1702
1703        mod_timer(&tx, jiffies + 1);
1704
1705        return 0;
1706err_unrtty:
1707        tty_unregister_driver(isicom_normal);
1708err_puttty:
1709        put_tty_driver(isicom_normal);
1710error:
1711        return retval;
1712}
1713
1714static void __exit isicom_exit(void)
1715{
1716        del_timer_sync(&tx);
1717
1718        pci_unregister_driver(&isicom_driver);
1719        tty_unregister_driver(isicom_normal);
1720        put_tty_driver(isicom_normal);
1721}
1722
1723module_init(isicom_init);
1724module_exit(isicom_exit);
1725
1726MODULE_AUTHOR("MultiTech");
1727MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1728MODULE_LICENSE("GPL");
1729MODULE_FIRMWARE("isi608.bin");
1730MODULE_FIRMWARE("isi608em.bin");
1731MODULE_FIRMWARE("isi616em.bin");
1732MODULE_FIRMWARE("isi4608.bin");
1733MODULE_FIRMWARE("isi4616.bin");
1734
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.