drivers/tty/isicom.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
WaitTillCardIsFree
lock_card
unlock_card
raise_dtr
drop_dtr
raise_rts
drop_rts
isicom_dtr_rts
drop_dtr_rts
__isicom_paranoia_check
isicom_tx
isicom_interrupt
isicom_config_port
isicom_setup_board
isicom_activate
isicom_carrier_raised
isicom_find_port
isicom_open
isicom_shutdown_port
isicom_flush_buffer
isicom_shutdown
isicom_close
isicom_write
isicom_put_char
isicom_flush_chars
isicom_write_room
isicom_chars_in_buffer
isicom_send_break
isicom_tiocmget
isicom_tiocmset
isicom_set_serial_info
isicom_get_serial_info
isicom_set_termios
isicom_throttle
isicom_unthrottle
isicom_stop
isicom_start
isicom_hangup
reset_card
load_firmware
isicom_probe
isicom_remove
isicom_init
isicom_exit
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *      Original driver code supplied by Multi-Tech
   4  *
   5  *      Changes
   6  *      1/9/98  alan@lxorguk.ukuu.org.uk
   7  *                                      Merge to 2.0.x kernel tree
   8  *                                      Obtain and use official major/minors
   9  *                                      Loader switched to a misc device
  10  *                                      (fixed range check bug as a side effect)
  11  *                                      Printk clean up
  12  *      9/12/98 alan@lxorguk.ukuu.org.uk
  13  *                                      Rough port to 2.1.x
  14  *
  15  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
  16  *                                      a new unified driver.
  17  *
  18  *      3/9/99  sameer                  Added support for ISI4616 cards.
  19  *
  20  *      16/9/99 sameer                  We do not force RTS low anymore.
  21  *                                      This is to prevent the firmware
  22  *                                      from getting confused.
  23  *
  24  *      26/10/99 sameer                 Cosmetic changes:The driver now
  25  *                                      dumps the Port Count information
  26  *                                      along with I/O address and IRQ.
  27  *
  28  *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
  29  *
  30  *      10/5/00  sameer                 Fixed isicom_shutdown_board()
  31  *                                      to not lower DTR on all the ports
  32  *                                      when the last port on the card is
  33  *                                      closed.
  34  *
  35  *      10/5/00  sameer                 Signal mask setup command added
  36  *                                      to  isicom_setup_port and
  37  *                                      isicom_shutdown_port.
  38  *
  39  *      24/5/00  sameer                 The driver is now SMP aware.
  40  *
  41  *
  42  *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
  43  *
  44  *
  45  *      03/01/01  anil .s               Added support for resetting the
  46  *                                      internal modems on ISI cards.
  47  *
  48  *      08/02/01  anil .s               Upgraded the driver for kernel
  49  *                                      2.4.x
  50  *
  51  *      11/04/01  Kevin                 Fixed firmware load problem with
  52  *                                      ISIHP-4X card
  53  *
  54  *      30/04/01  anil .s               Fixed the remote login through
  55  *                                      ISI port problem. Now the link
  56  *                                      does not go down before password
  57  *                                      prompt.
  58  *
  59  *      03/05/01  anil .s               Fixed the problem with IRQ sharing
  60  *                                      among ISI-PCI cards.
  61  *
  62  *      03/05/01  anil .s               Added support to display the version
  63  *                                      info during insmod as well as module
  64  *                                      listing by lsmod.
  65  *
  66  *      10/05/01  anil .s               Done the modifications to the source
  67  *                                      file and Install script so that the
  68  *                                      same installation can be used for
  69  *                                      2.2.x and 2.4.x kernel.
  70  *
  71  *      06/06/01  anil .s               Now we drop both dtr and rts during
  72  *                                      shutdown_port as well as raise them
  73  *                                      during isicom_config_port.
  74  *
  75  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
  76  *                                      restore_flags on failure in
  77  *                                      isicom_send_break, verify put_user
  78  *                                      result
  79  *
  80  *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
  81  *                                      Baud index extended to 21
  82  *
  83  *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
  84  *                                      Taken care of license warning.
  85  *
  86  *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
  87  *                                      Red Hat Distribution
  88  *
  89  *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
  90  *                                      into a single 2.6 driver
  91  *
  92  *      ***********************************************************
  93  *
  94  *      To use this driver you also need the support package. You
  95  *      can find this in RPM format on
  96  *              ftp://ftp.linux.org.uk/pub/linux/alan
  97  *
  98  *      You can find the original tools for this direct from Multitech
  99  *              ftp://ftp.multitech.com/ISI-Cards/
 100  *
 101  *      Having installed the cards the module options (/etc/modprobe.d/)
 102  *
 103  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
 104  *
 105  *      Omit those entries for boards you don't have installed.
 106  *
 107  *      TODO
 108  *              Merge testing
 109  *              64-bit verification
 110  */
 111 
 112 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 113 
 114 #include <linux/module.h>
 115 #include <linux/firmware.h>
 116 #include <linux/kernel.h>
 117 #include <linux/tty.h>
 118 #include <linux/tty_flip.h>
 119 #include <linux/termios.h>
 120 #include <linux/fs.h>
 121 #include <linux/sched.h>
 122 #include <linux/serial.h>
 123 #include <linux/mm.h>
 124 #include <linux/interrupt.h>
 125 #include <linux/timer.h>
 126 #include <linux/delay.h>
 127 #include <linux/ioport.h>
 128 #include <linux/slab.h>
 129 
 130 #include <linux/uaccess.h>
 131 #include <linux/io.h>
 132 
 133 #include <linux/pci.h>
 134 
 135 #include <linux/isicom.h>
 136 
 137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
 138 #define ClearInterrupt(base) inw((base) + 0x0a)
 139 
 140 #ifdef DEBUG
 141 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
 142 #else
 143 #define isicom_paranoia_check(a, b, c) 0
 144 #endif
 145 
 146 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 147 static void isicom_remove(struct pci_dev *);
 148 
 149 static const struct pci_device_id isicom_pci_tbl[] = {
 150         { PCI_DEVICE(VENDOR_ID, 0x2028) },
 151         { PCI_DEVICE(VENDOR_ID, 0x2051) },
 152         { PCI_DEVICE(VENDOR_ID, 0x2052) },
 153         { PCI_DEVICE(VENDOR_ID, 0x2053) },
 154         { PCI_DEVICE(VENDOR_ID, 0x2054) },
 155         { PCI_DEVICE(VENDOR_ID, 0x2055) },
 156         { PCI_DEVICE(VENDOR_ID, 0x2056) },
 157         { PCI_DEVICE(VENDOR_ID, 0x2057) },
 158         { PCI_DEVICE(VENDOR_ID, 0x2058) },
 159         { 0 }
 160 };
 161 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
 162 
 163 static struct pci_driver isicom_driver = {
 164         .name           = "isicom",
 165         .id_table       = isicom_pci_tbl,
 166         .probe          = isicom_probe,
 167         .remove         = isicom_remove
 168 };
 169 
 170 static int prev_card = 3;       /*      start servicing isi_card[0]     */
 171 static struct tty_driver *isicom_normal;
 172 
 173 static void isicom_tx(struct timer_list *unused);
 174 static void isicom_start(struct tty_struct *tty);
 175 
 176 static DEFINE_TIMER(tx, isicom_tx);
 177 
 178 /*   baud index mappings from linux defns to isi */
 179 
 180 static signed char linuxb_to_isib[] = {
 181         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
 182 };
 183 
 184 struct  isi_board {
 185         unsigned long           base;
 186         int                     irq;
 187         unsigned char           port_count;
 188         unsigned short          status;
 189         unsigned short          port_status; /* each bit for each port */
 190         unsigned short          shift_count;
 191         struct isi_port         *ports;
 192         signed char             count;
 193         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
 194         unsigned long           flags;
 195         unsigned int            index;
 196 };
 197 
 198 struct  isi_port {
 199         unsigned short          magic;
 200         struct tty_port         port;
 201         u16                     channel;
 202         u16                     status;
 203         struct isi_board        *card;
 204         unsigned char           *xmit_buf;
 205         int                     xmit_head;
 206         int                     xmit_tail;
 207         int                     xmit_cnt;
 208 };
 209 
 210 static struct isi_board isi_card[BOARD_COUNT];
 211 static struct isi_port  isi_ports[PORT_COUNT];
 212 
 213 /*
 214  *      Locking functions for card level locking. We need to own both
 215  *      the kernel lock for the card and have the card in a position that
 216  *      it wants to talk.
 217  */
 218 
 219 static int WaitTillCardIsFree(unsigned long base)
 220 {
 221         unsigned int count = 0;
 222 
 223         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
 224                 mdelay(1);
 225 
 226         return !(inw(base + 0xe) & 0x1);
 227 }
 228 
 229 static int lock_card(struct isi_board *card)
 230 {
 231         unsigned long base = card->base;
 232         unsigned int retries, a;
 233 
 234         for (retries = 0; retries < 10; retries++) {
 235                 spin_lock_irqsave(&card->card_lock, card->flags);
 236                 for (a = 0; a < 10; a++) {
 237                         if (inw(base + 0xe) & 0x1)
 238                                 return 1;
 239                         udelay(10);
 240                 }
 241                 spin_unlock_irqrestore(&card->card_lock, card->flags);
 242                 msleep(10);
 243         }
 244         pr_warn("Failed to lock Card (0x%lx)\n", card->base);
 245 
 246         return 0;       /* Failed to acquire the card! */
 247 }
 248 
 249 static void unlock_card(struct isi_board *card)
 250 {
 251         spin_unlock_irqrestore(&card->card_lock, card->flags);
 252 }
 253 
 254 /*
 255  *  ISI Card specific ops ...
 256  */
 257 
 258 /* card->lock HAS to be held */
 259 static void raise_dtr(struct isi_port *port)
 260 {
 261         struct isi_board *card = port->card;
 262         unsigned long base = card->base;
 263         u16 channel = port->channel;
 264 
 265         if (WaitTillCardIsFree(base))
 266                 return;
 267 
 268         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 269         outw(0x0504, base);
 270         InterruptTheCard(base);
 271         port->status |= ISI_DTR;
 272 }
 273 
 274 /* card->lock HAS to be held */
 275 static void drop_dtr(struct isi_port *port)
 276 {
 277         struct isi_board *card = port->card;
 278         unsigned long base = card->base;
 279         u16 channel = port->channel;
 280 
 281         if (WaitTillCardIsFree(base))
 282                 return;
 283 
 284         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 285         outw(0x0404, base);
 286         InterruptTheCard(base);
 287         port->status &= ~ISI_DTR;
 288 }
 289 
 290 /* card->lock HAS to be held */
 291 static inline void raise_rts(struct isi_port *port)
 292 {
 293         struct isi_board *card = port->card;
 294         unsigned long base = card->base;
 295         u16 channel = port->channel;
 296 
 297         if (WaitTillCardIsFree(base))
 298                 return;
 299 
 300         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 301         outw(0x0a04, base);
 302         InterruptTheCard(base);
 303         port->status |= ISI_RTS;
 304 }
 305 
 306 /* card->lock HAS to be held */
 307 static inline void drop_rts(struct isi_port *port)
 308 {
 309         struct isi_board *card = port->card;
 310         unsigned long base = card->base;
 311         u16 channel = port->channel;
 312 
 313         if (WaitTillCardIsFree(base))
 314                 return;
 315 
 316         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 317         outw(0x0804, base);
 318         InterruptTheCard(base);
 319         port->status &= ~ISI_RTS;
 320 }
 321 
 322 /* card->lock MUST NOT be held */
 323 
 324 static void isicom_dtr_rts(struct tty_port *port, int on)
 325 {
 326         struct isi_port *ip = container_of(port, struct isi_port, port);
 327         struct isi_board *card = ip->card;
 328         unsigned long base = card->base;
 329         u16 channel = ip->channel;
 330 
 331         if (!lock_card(card))
 332                 return;
 333 
 334         if (on) {
 335                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 336                 outw(0x0f04, base);
 337                 InterruptTheCard(base);
 338                 ip->status |= (ISI_DTR | ISI_RTS);
 339         } else {
 340                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 341                 outw(0x0C04, base);
 342                 InterruptTheCard(base);
 343                 ip->status &= ~(ISI_DTR | ISI_RTS);
 344         }
 345         unlock_card(card);
 346 }
 347 
 348 /* card->lock HAS to be held */
 349 static void drop_dtr_rts(struct isi_port *port)
 350 {
 351         struct isi_board *card = port->card;
 352         unsigned long base = card->base;
 353         u16 channel = port->channel;
 354 
 355         if (WaitTillCardIsFree(base))
 356                 return;
 357 
 358         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
 359         outw(0x0c04, base);
 360         InterruptTheCard(base);
 361         port->status &= ~(ISI_RTS | ISI_DTR);
 362 }
 363 
 364 /*
 365  *      ISICOM Driver specific routines ...
 366  *
 367  */
 368 
 369 static inline int __isicom_paranoia_check(struct isi_port const *port,
 370         char *name, const char *routine)
 371 {
 372         if (!port) {
 373                 pr_warn("Warning: bad isicom magic for dev %s in %s\n",
 374                         name, routine);
 375                 return 1;
 376         }
 377         if (port->magic != ISICOM_MAGIC) {
 378                 pr_warn("Warning: NULL isicom port for dev %s in %s\n",
 379                         name, routine);
 380                 return 1;
 381         }
 382 
 383         return 0;
 384 }
 385 
 386 /*
 387  *      Transmitter.
 388  *
 389  *      We shovel data into the card buffers on a regular basis. The card
 390  *      will do the rest of the work for us.
 391  */
 392 
 393 static void isicom_tx(struct timer_list *unused)
 394 {
 395         unsigned long flags, base;
 396         unsigned int retries;
 397         short count = (BOARD_COUNT-1), card;
 398         short txcount, wrd, residue, word_count, cnt;
 399         struct isi_port *port;
 400         struct tty_struct *tty;
 401 
 402         /*      find next active board  */
 403         card = (prev_card + 1) & 0x0003;
 404         while (count-- > 0) {
 405                 if (isi_card[card].status & BOARD_ACTIVE)
 406                         break;
 407                 card = (card + 1) & 0x0003;
 408         }
 409         if (!(isi_card[card].status & BOARD_ACTIVE))
 410                 goto sched_again;
 411 
 412         prev_card = card;
 413 
 414         count = isi_card[card].port_count;
 415         port = isi_card[card].ports;
 416         base = isi_card[card].base;
 417 
 418         spin_lock_irqsave(&isi_card[card].card_lock, flags);
 419         for (retries = 0; retries < 100; retries++) {
 420                 if (inw(base + 0xe) & 0x1)
 421                         break;
 422                 udelay(2);
 423         }
 424         if (retries >= 100)
 425                 goto unlock;
 426 
 427         tty = tty_port_tty_get(&port->port);
 428         if (tty == NULL)
 429                 goto put_unlock;
 430 
 431         for (; count > 0; count--, port++) {
 432                 /* port not active or tx disabled to force flow control */
 433                 if (!tty_port_initialized(&port->port) ||
 434                         !(port->status & ISI_TXOK))
 435                         continue;
 436 
 437                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 438                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 439                         continue;
 440 
 441                 if (!(inw(base + 0x02) & (1 << port->channel)))
 442                         continue;
 443 
 444                 pr_debug("txing %d bytes, port%d.\n",
 445                          txcount, port->channel + 1);
 446                 outw((port->channel << isi_card[card].shift_count) | txcount,
 447                         base);
 448                 residue = NO;
 449                 wrd = 0;
 450                 while (1) {
 451                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
 452                                         - port->xmit_tail));
 453                         if (residue == YES) {
 454                                 residue = NO;
 455                                 if (cnt > 0) {
 456                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
 457                                                                         << 8);
 458                                         port->xmit_tail = (port->xmit_tail + 1)
 459                                                 & (SERIAL_XMIT_SIZE - 1);
 460                                         port->xmit_cnt--;
 461                                         txcount--;
 462                                         cnt--;
 463                                         outw(wrd, base);
 464                                 } else {
 465                                         outw(wrd, base);
 466                                         break;
 467                                 }
 468                         }
 469                         if (cnt <= 0)
 470                                 break;
 471                         word_count = cnt >> 1;
 472                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 473                         port->xmit_tail = (port->xmit_tail
 474                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 475                         txcount -= (word_count << 1);
 476                         port->xmit_cnt -= (word_count << 1);
 477                         if (cnt & 0x0001) {
 478                                 residue = YES;
 479                                 wrd = port->port.xmit_buf[port->xmit_tail];
 480                                 port->xmit_tail = (port->xmit_tail + 1)
 481                                         & (SERIAL_XMIT_SIZE - 1);
 482                                 port->xmit_cnt--;
 483                                 txcount--;
 484                         }
 485                 }
 486 
 487                 InterruptTheCard(base);
 488                 if (port->xmit_cnt <= 0)
 489                         port->status &= ~ISI_TXOK;
 490                 if (port->xmit_cnt <= WAKEUP_CHARS)
 491                         tty_wakeup(tty);
 492         }
 493 
 494 put_unlock:
 495         tty_kref_put(tty);
 496 unlock:
 497         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 498         /*      schedule another tx for hopefully in about 10ms */
 499 sched_again:
 500         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
 501 }
 502 
 503 /*
 504  *      Main interrupt handler routine
 505  */
 506 
 507 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 508 {
 509         struct isi_board *card = dev_id;
 510         struct isi_port *port;
 511         struct tty_struct *tty;
 512         unsigned long base;
 513         u16 header, word_count, count, channel;
 514         short byte_count;
 515         unsigned char *rp;
 516 
 517         if (!card || !(card->status & FIRMWARE_LOADED))
 518                 return IRQ_NONE;
 519 
 520         base = card->base;
 521 
 522         /* did the card interrupt us? */
 523         if (!(inw(base + 0x0e) & 0x02))
 524                 return IRQ_NONE;
 525 
 526         spin_lock(&card->card_lock);
 527 
 528         /*
 529          * disable any interrupts from the PCI card and lower the
 530          * interrupt line
 531          */
 532         outw(0x8000, base+0x04);
 533         ClearInterrupt(base);
 534 
 535         inw(base);              /* get the dummy word out */
 536         header = inw(base);
 537         channel = (header & 0x7800) >> card->shift_count;
 538         byte_count = header & 0xff;
 539 
 540         if (channel + 1 > card->port_count) {
 541                 pr_warn("%s(0x%lx): %d(channel) > port_count\n",
 542                         __func__, base, channel + 1);
 543                 outw(0x0000, base+0x04); /* enable interrupts */
 544                 spin_unlock(&card->card_lock);
 545                 return IRQ_HANDLED;
 546         }
 547         port = card->ports + channel;
 548         if (!tty_port_initialized(&port->port)) {
 549                 outw(0x0000, base+0x04); /* enable interrupts */
 550                 spin_unlock(&card->card_lock);
 551                 return IRQ_HANDLED;
 552         }
 553 
 554         tty = tty_port_tty_get(&port->port);
 555         if (tty == NULL) {
 556                 while (byte_count > 1) {
 557                         inw(base);
 558                         byte_count -= 2;
 559                 }
 560                 if (byte_count & 0x01)
 561                         inw(base);
 562                 outw(0x0000, base+0x04); /* enable interrupts */
 563                 spin_unlock(&card->card_lock);
 564                 return IRQ_HANDLED;
 565         }
 566 
 567         if (header & 0x8000) {          /* Status Packet */
 568                 header = inw(base);
 569                 switch (header & 0xff) {
 570                 case 0: /* Change in EIA signals */
 571                         if (tty_port_check_carrier(&port->port)) {
 572                                 if (port->status & ISI_DCD) {
 573                                         if (!(header & ISI_DCD)) {
 574                                         /* Carrier has been lost  */
 575                                                 pr_debug("%s: DCD->low.\n",
 576                                                          __func__);
 577                                                 port->status &= ~ISI_DCD;
 578                                                 tty_hangup(tty);
 579                                         }
 580                                 } else if (header & ISI_DCD) {
 581                                 /* Carrier has been detected */
 582                                         pr_debug("%s: DCD->high.\n",
 583                                                 __func__);
 584                                         port->status |= ISI_DCD;
 585                                         wake_up_interruptible(&port->port.open_wait);
 586                                 }
 587                         } else {
 588                                 if (header & ISI_DCD)
 589                                         port->status |= ISI_DCD;
 590                                 else
 591                                         port->status &= ~ISI_DCD;
 592                         }
 593 
 594                         if (tty_port_cts_enabled(&port->port)) {
 595                                 if (tty->hw_stopped) {
 596                                         if (header & ISI_CTS) {
 597                                                 tty->hw_stopped = 0;
 598                                                 /* start tx ing */
 599                                                 port->status |= (ISI_TXOK
 600                                                         | ISI_CTS);
 601                                                 tty_wakeup(tty);
 602                                         }
 603                                 } else if (!(header & ISI_CTS)) {
 604                                         tty->hw_stopped = 1;
 605                                         /* stop tx ing */
 606                                         port->status &= ~(ISI_TXOK | ISI_CTS);
 607                                 }
 608                         } else {
 609                                 if (header & ISI_CTS)
 610                                         port->status |= ISI_CTS;
 611                                 else
 612                                         port->status &= ~ISI_CTS;
 613                         }
 614 
 615                         if (header & ISI_DSR)
 616                                 port->status |= ISI_DSR;
 617                         else
 618                                 port->status &= ~ISI_DSR;
 619 
 620                         if (header & ISI_RI)
 621                                 port->status |= ISI_RI;
 622                         else
 623                                 port->status &= ~ISI_RI;
 624 
 625                         break;
 626 
 627                 case 1: /* Received Break !!! */
 628                         tty_insert_flip_char(&port->port, 0, TTY_BREAK);
 629                         if (port->port.flags & ASYNC_SAK)
 630                                 do_SAK(tty);
 631                         tty_flip_buffer_push(&port->port);
 632                         break;
 633 
 634                 case 2: /* Statistics            */
 635                         pr_debug("%s: stats!!!\n", __func__);
 636                         break;
 637 
 638                 default:
 639                         pr_debug("%s: Unknown code in status packet.\n",
 640                                  __func__);
 641                         break;
 642                 }
 643         } else {                                /* Data   Packet */
 644                 count = tty_prepare_flip_string(&port->port, &rp,
 645                                 byte_count & ~1);
 646                 pr_debug("%s: Can rx %d of %d bytes.\n",
 647                          __func__, count, byte_count);
 648                 word_count = count >> 1;
 649                 insw(base, rp, word_count);
 650                 byte_count -= (word_count << 1);
 651                 if (count & 0x0001) {
 652                         tty_insert_flip_char(&port->port, inw(base) & 0xff,
 653                                 TTY_NORMAL);
 654                         byte_count -= 2;
 655                 }
 656                 if (byte_count > 0) {
 657                         pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
 658                                  __func__, base, channel + 1);
 659                 /* drain out unread xtra data */
 660                 while (byte_count > 0) {
 661                                 inw(base);
 662                                 byte_count -= 2;
 663                         }
 664                 }
 665                 tty_flip_buffer_push(&port->port);
 666         }
 667         outw(0x0000, base+0x04); /* enable interrupts */
 668         spin_unlock(&card->card_lock);
 669         tty_kref_put(tty);
 670 
 671         return IRQ_HANDLED;
 672 }
 673 
 674 static void isicom_config_port(struct tty_struct *tty)
 675 {
 676         struct isi_port *port = tty->driver_data;
 677         struct isi_board *card = port->card;
 678         unsigned long baud;
 679         unsigned long base = card->base;
 680         u16 channel_setup, channel = port->channel,
 681                 shift_count = card->shift_count;
 682         unsigned char flow_ctrl;
 683 
 684         /* FIXME: Switch to new tty baud API */
 685         baud = C_BAUD(tty);
 686         if (baud & CBAUDEX) {
 687                 baud &= ~CBAUDEX;
 688 
 689                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
 690                  *  then the card is programmed for 57.6Kbps or 115Kbps
 691                  *  respectively.
 692                  */
 693 
 694                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 695                 if (baud < 1 || baud > 4)
 696                         tty->termios.c_cflag &= ~CBAUDEX;
 697                 else
 698                         baud += 15;
 699         }
 700         if (baud == 15) {
 701 
 702                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
 703                  *  by the set_serial_info ioctl ... this is done by
 704                  *  the 'setserial' utility.
 705                  */
 706 
 707                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 708                         baud++; /*  57.6 Kbps */
 709                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 710                         baud += 2; /*  115  Kbps */
 711                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 712                         baud += 3; /* 230 kbps*/
 713                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 714                         baud += 4; /* 460 kbps*/
 715         }
 716         if (linuxb_to_isib[baud] == -1) {
 717                 /* hang up */
 718                 drop_dtr(port);
 719                 return;
 720         } else
 721                 raise_dtr(port);
 722 
 723         if (WaitTillCardIsFree(base) == 0) {
 724                 outw(0x8000 | (channel << shift_count) | 0x03, base);
 725                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
 726                 channel_setup = 0;
 727                 switch (C_CSIZE(tty)) {
 728                 case CS5:
 729                         channel_setup |= ISICOM_CS5;
 730                         break;
 731                 case CS6:
 732                         channel_setup |= ISICOM_CS6;
 733                         break;
 734                 case CS7:
 735                         channel_setup |= ISICOM_CS7;
 736                         break;
 737                 case CS8:
 738                         channel_setup |= ISICOM_CS8;
 739                         break;
 740                 }
 741 
 742                 if (C_CSTOPB(tty))
 743                         channel_setup |= ISICOM_2SB;
 744                 if (C_PARENB(tty)) {
 745                         channel_setup |= ISICOM_EVPAR;
 746                         if (C_PARODD(tty))
 747                                 channel_setup |= ISICOM_ODPAR;
 748                 }
 749                 outw(channel_setup, base);
 750                 InterruptTheCard(base);
 751         }
 752         tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
 753 
 754         /* flow control settings ...*/
 755         flow_ctrl = 0;
 756         tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
 757         if (C_CRTSCTS(tty))
 758                 flow_ctrl |= ISICOM_CTSRTS;
 759         if (I_IXON(tty))
 760                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
 761         if (I_IXOFF(tty))
 762                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 763 
 764         if (WaitTillCardIsFree(base) == 0) {
 765                 outw(0x8000 | (channel << shift_count) | 0x04, base);
 766                 outw(flow_ctrl << 8 | 0x05, base);
 767                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
 768                 InterruptTheCard(base);
 769         }
 770 
 771         /*      rx enabled -> enable port for rx on the card    */
 772         if (C_CREAD(tty)) {
 773                 card->port_status |= (1 << channel);
 774                 outw(card->port_status, base + 0x02);
 775         }
 776 }
 777 
 778 /* open et all */
 779 
 780 static inline void isicom_setup_board(struct isi_board *bp)
 781 {
 782         int channel;
 783         struct isi_port *port;
 784 
 785         bp->count++;
 786         if (!(bp->status & BOARD_INIT)) {
 787                 port = bp->ports;
 788                 for (channel = 0; channel < bp->port_count; channel++, port++)
 789                         drop_dtr_rts(port);
 790         }
 791         bp->status |= BOARD_ACTIVE | BOARD_INIT;
 792 }
 793 
 794 /* Activate and thus setup board are protected from races against shutdown
 795    by the tty_port mutex */
 796 
 797 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
 798 {
 799         struct isi_port *port = container_of(tport, struct isi_port, port);
 800         struct isi_board *card = port->card;
 801         unsigned long flags;
 802 
 803         if (tty_port_alloc_xmit_buf(tport) < 0)
 804                 return -ENOMEM;
 805 
 806         spin_lock_irqsave(&card->card_lock, flags);
 807         isicom_setup_board(card);
 808 
 809         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 810 
 811         /*      discard any residual data       */
 812         if (WaitTillCardIsFree(card->base) == 0) {
 813                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
 814                                 card->base);
 815                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
 816                 InterruptTheCard(card->base);
 817         }
 818         isicom_config_port(tty);
 819         spin_unlock_irqrestore(&card->card_lock, flags);
 820 
 821         return 0;
 822 }
 823 
 824 static int isicom_carrier_raised(struct tty_port *port)
 825 {
 826         struct isi_port *ip = container_of(port, struct isi_port, port);
 827         return (ip->status & ISI_DCD)?1 : 0;
 828 }
 829 
 830 static struct tty_port *isicom_find_port(struct tty_struct *tty)
 831 {
 832         struct isi_port *port;
 833         struct isi_board *card;
 834         unsigned int board;
 835         int line = tty->index;
 836 
 837         board = BOARD(line);
 838         card = &isi_card[board];
 839 
 840         if (!(card->status & FIRMWARE_LOADED))
 841                 return NULL;
 842 
 843         /*  open on a port greater than the port count for the card !!! */
 844         if (line > ((board * 16) + card->port_count - 1))
 845                 return NULL;
 846 
 847         port = &isi_ports[line];
 848         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
 849                 return NULL;
 850 
 851         return &port->port;
 852 }
 853 
 854 static int isicom_open(struct tty_struct *tty, struct file *filp)
 855 {
 856         struct isi_port *port;
 857         struct tty_port *tport;
 858 
 859         tport = isicom_find_port(tty);
 860         if (tport == NULL)
 861                 return -ENODEV;
 862         port = container_of(tport, struct isi_port, port);
 863 
 864         tty->driver_data = port;
 865         return tty_port_open(tport, tty, filp);
 866 }
 867 
 868 /* close et all */
 869 
 870 /* card->lock HAS to be held */
 871 static void isicom_shutdown_port(struct isi_port *port)
 872 {
 873         struct isi_board *card = port->card;
 874 
 875         if (--card->count < 0) {
 876                 pr_debug("%s: bad board(0x%lx) count %d.\n",
 877                          __func__, card->base, card->count);
 878                 card->count = 0;
 879         }
 880         /* last port was closed, shutdown that board too */
 881         if (!card->count)
 882                 card->status &= BOARD_ACTIVE;
 883 }
 884 
 885 static void isicom_flush_buffer(struct tty_struct *tty)
 886 {
 887         struct isi_port *port = tty->driver_data;
 888         struct isi_board *card = port->card;
 889         unsigned long flags;
 890 
 891         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
 892                 return;
 893 
 894         spin_lock_irqsave(&card->card_lock, flags);
 895         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 896         spin_unlock_irqrestore(&card->card_lock, flags);
 897 
 898         tty_wakeup(tty);
 899 }
 900 
 901 static void isicom_shutdown(struct tty_port *port)
 902 {
 903         struct isi_port *ip = container_of(port, struct isi_port, port);
 904         struct isi_board *card = ip->card;
 905         unsigned long flags;
 906 
 907         /* indicate to the card that no more data can be received
 908            on this port */
 909         spin_lock_irqsave(&card->card_lock, flags);
 910         card->port_status &= ~(1 << ip->channel);
 911         outw(card->port_status, card->base + 0x02);
 912         isicom_shutdown_port(ip);
 913         spin_unlock_irqrestore(&card->card_lock, flags);
 914         tty_port_free_xmit_buf(port);
 915 }
 916 
 917 static void isicom_close(struct tty_struct *tty, struct file *filp)
 918 {
 919         struct isi_port *ip = tty->driver_data;
 920         struct tty_port *port;
 921 
 922         if (ip == NULL)
 923                 return;
 924 
 925         port = &ip->port;
 926         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
 927                 return;
 928         tty_port_close(port, tty, filp);
 929 }
 930 
 931 /* write et all */
 932 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 933         int count)
 934 {
 935         struct isi_port *port = tty->driver_data;
 936         struct isi_board *card = port->card;
 937         unsigned long flags;
 938         int cnt, total = 0;
 939 
 940         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 941                 return 0;
 942 
 943         spin_lock_irqsave(&card->card_lock, flags);
 944 
 945         while (1) {
 946                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
 947                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
 948                 if (cnt <= 0)
 949                         break;
 950 
 951                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 952                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 953                         - 1);
 954                 port->xmit_cnt += cnt;
 955                 buf += cnt;
 956                 count -= cnt;
 957                 total += cnt;
 958         }
 959         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
 960                 port->status |= ISI_TXOK;
 961         spin_unlock_irqrestore(&card->card_lock, flags);
 962         return total;
 963 }
 964 
 965 /* put_char et all */
 966 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 967 {
 968         struct isi_port *port = tty->driver_data;
 969         struct isi_board *card = port->card;
 970         unsigned long flags;
 971 
 972         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 973                 return 0;
 974 
 975         spin_lock_irqsave(&card->card_lock, flags);
 976         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 977                 spin_unlock_irqrestore(&card->card_lock, flags);
 978                 return 0;
 979         }
 980 
 981         port->port.xmit_buf[port->xmit_head++] = ch;
 982         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 983         port->xmit_cnt++;
 984         spin_unlock_irqrestore(&card->card_lock, flags);
 985         return 1;
 986 }
 987 
 988 /* flush_chars et all */
 989 static void isicom_flush_chars(struct tty_struct *tty)
 990 {
 991         struct isi_port *port = tty->driver_data;
 992 
 993         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
 994                 return;
 995 
 996         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
 997                         !port->port.xmit_buf)
 998                 return;
 999 
1000         /* this tells the transmitter to consider this port for
1001            data output to the card ... that's the best we can do. */
1002         port->status |= ISI_TXOK;
1003 }
1004 
1005 /* write_room et all */
1006 static int isicom_write_room(struct tty_struct *tty)
1007 {
1008         struct isi_port *port = tty->driver_data;
1009         int free;
1010 
1011         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1012                 return 0;
1013 
1014         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1015         if (free < 0)
1016                 free = 0;
1017         return free;
1018 }
1019 
1020 /* chars_in_buffer et all */
1021 static int isicom_chars_in_buffer(struct tty_struct *tty)
1022 {
1023         struct isi_port *port = tty->driver_data;
1024         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1025                 return 0;
1026         return port->xmit_cnt;
1027 }
1028 
1029 /* ioctl et all */
1030 static int isicom_send_break(struct tty_struct *tty, int length)
1031 {
1032         struct isi_port *port = tty->driver_data;
1033         struct isi_board *card = port->card;
1034         unsigned long base = card->base;
1035 
1036         if (length == -1)
1037                 return -EOPNOTSUPP;
1038 
1039         if (!lock_card(card))
1040                 return -EINVAL;
1041 
1042         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1043         outw((length & 0xff) << 8 | 0x00, base);
1044         outw((length & 0xff00u), base);
1045         InterruptTheCard(base);
1046 
1047         unlock_card(card);
1048         return 0;
1049 }
1050 
1051 static int isicom_tiocmget(struct tty_struct *tty)
1052 {
1053         struct isi_port *port = tty->driver_data;
1054         /* just send the port status */
1055         u16 status = port->status;
1056 
1057         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1058                 return -ENODEV;
1059 
1060         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1061                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1062                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1063                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1064                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1065                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1066 }
1067 
1068 static int isicom_tiocmset(struct tty_struct *tty,
1069                                         unsigned int set, unsigned int clear)
1070 {
1071         struct isi_port *port = tty->driver_data;
1072         unsigned long flags;
1073 
1074         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1075                 return -ENODEV;
1076 
1077         spin_lock_irqsave(&port->card->card_lock, flags);
1078         if (set & TIOCM_RTS)
1079                 raise_rts(port);
1080         if (set & TIOCM_DTR)
1081                 raise_dtr(port);
1082 
1083         if (clear & TIOCM_RTS)
1084                 drop_rts(port);
1085         if (clear & TIOCM_DTR)
1086                 drop_dtr(port);
1087         spin_unlock_irqrestore(&port->card->card_lock, flags);
1088 
1089         return 0;
1090 }
1091 
1092 static int isicom_set_serial_info(struct tty_struct *tty,
1093                                         struct serial_struct *ss)
1094 {
1095         struct isi_port *port = tty->driver_data;
1096         int reconfig_port;
1097 
1098         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1099                 return -ENODEV;
1100 
1101         mutex_lock(&port->port.mutex);
1102         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1103                 (ss->flags & ASYNC_SPD_MASK));
1104 
1105         if (!capable(CAP_SYS_ADMIN)) {
1106                 if ((ss->close_delay != port->port.close_delay) ||
1107                                 (ss->closing_wait != port->port.closing_wait) ||
1108                                 ((ss->flags & ~ASYNC_USR_MASK) !=
1109                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1110                         mutex_unlock(&port->port.mutex);
1111                         return -EPERM;
1112                 }
1113                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1114                                 (ss->flags & ASYNC_USR_MASK));
1115         } else {
1116                 port->port.close_delay = ss->close_delay;
1117                 port->port.closing_wait = ss->closing_wait;
1118                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1119                                 (ss->flags & ASYNC_FLAGS));
1120         }
1121         if (reconfig_port) {
1122                 unsigned long flags;
1123                 spin_lock_irqsave(&port->card->card_lock, flags);
1124                 isicom_config_port(tty);
1125                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1126         }
1127         mutex_unlock(&port->port.mutex);
1128         return 0;
1129 }
1130 
1131 static int isicom_get_serial_info(struct tty_struct *tty,
1132         struct serial_struct *ss)
1133 {
1134         struct isi_port *port = tty->driver_data;
1135 
1136         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1137                 return -ENODEV;
1138 
1139         mutex_lock(&port->port.mutex);
1140 /*      ss->type = ? */
1141         ss->line = port - isi_ports;
1142         ss->port = port->card->base;
1143         ss->irq = port->card->irq;
1144         ss->flags = port->port.flags;
1145 /*      ss->baud_base = ? */
1146         ss->close_delay = port->port.close_delay;
1147         ss->closing_wait = port->port.closing_wait;
1148         mutex_unlock(&port->port.mutex);
1149         return 0;
1150 }
1151 
1152 /* set_termios et all */
1153 static void isicom_set_termios(struct tty_struct *tty,
1154         struct ktermios *old_termios)
1155 {
1156         struct isi_port *port = tty->driver_data;
1157         unsigned long flags;
1158 
1159         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1160                 return;
1161 
1162         if (tty->termios.c_cflag == old_termios->c_cflag &&
1163                         tty->termios.c_iflag == old_termios->c_iflag)
1164                 return;
1165 
1166         spin_lock_irqsave(&port->card->card_lock, flags);
1167         isicom_config_port(tty);
1168         spin_unlock_irqrestore(&port->card->card_lock, flags);
1169 
1170         if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1171                 tty->hw_stopped = 0;
1172                 isicom_start(tty);
1173         }
1174 }
1175 
1176 /* throttle et all */
1177 static void isicom_throttle(struct tty_struct *tty)
1178 {
1179         struct isi_port *port = tty->driver_data;
1180         struct isi_board *card = port->card;
1181 
1182         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1183                 return;
1184 
1185         /* tell the card that this port cannot handle any more data for now */
1186         card->port_status &= ~(1 << port->channel);
1187         outw(card->port_status, card->base + 0x02);
1188 }
1189 
1190 /* unthrottle et all */
1191 static void isicom_unthrottle(struct tty_struct *tty)
1192 {
1193         struct isi_port *port = tty->driver_data;
1194         struct isi_board *card = port->card;
1195 
1196         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1197                 return;
1198 
1199         /* tell the card that this port is ready to accept more data */
1200         card->port_status |= (1 << port->channel);
1201         outw(card->port_status, card->base + 0x02);
1202 }
1203 
1204 /* stop et all */
1205 static void isicom_stop(struct tty_struct *tty)
1206 {
1207         struct isi_port *port = tty->driver_data;
1208 
1209         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1210                 return;
1211 
1212         /* this tells the transmitter not to consider this port for
1213            data output to the card. */
1214         port->status &= ~ISI_TXOK;
1215 }
1216 
1217 /* start et all */
1218 static void isicom_start(struct tty_struct *tty)
1219 {
1220         struct isi_port *port = tty->driver_data;
1221 
1222         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1223                 return;
1224 
1225         /* this tells the transmitter to consider this port for
1226            data output to the card. */
1227         port->status |= ISI_TXOK;
1228 }
1229 
1230 static void isicom_hangup(struct tty_struct *tty)
1231 {
1232         struct isi_port *port = tty->driver_data;
1233 
1234         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1235                 return;
1236         tty_port_hangup(&port->port);
1237 }
1238 
1239 
1240 /*
1241  * Driver init and deinit functions
1242  */
1243 
1244 static const struct tty_operations isicom_ops = {
1245         .open                   = isicom_open,
1246         .close                  = isicom_close,
1247         .write                  = isicom_write,
1248         .put_char               = isicom_put_char,
1249         .flush_chars            = isicom_flush_chars,
1250         .write_room             = isicom_write_room,
1251         .chars_in_buffer        = isicom_chars_in_buffer,
1252         .set_termios            = isicom_set_termios,
1253         .throttle               = isicom_throttle,
1254         .unthrottle             = isicom_unthrottle,
1255         .stop                   = isicom_stop,
1256         .start                  = isicom_start,
1257         .hangup                 = isicom_hangup,
1258         .flush_buffer           = isicom_flush_buffer,
1259         .tiocmget               = isicom_tiocmget,
1260         .tiocmset               = isicom_tiocmset,
1261         .break_ctl              = isicom_send_break,
1262         .get_serial             = isicom_get_serial_info,
1263         .set_serial             = isicom_set_serial_info,
1264 };
1265 
1266 static const struct tty_port_operations isicom_port_ops = {
1267         .carrier_raised         = isicom_carrier_raised,
1268         .dtr_rts                = isicom_dtr_rts,
1269         .activate               = isicom_activate,
1270         .shutdown               = isicom_shutdown,
1271 };
1272 
1273 static int reset_card(struct pci_dev *pdev,
1274         const unsigned int card, unsigned int *signature)
1275 {
1276         struct isi_board *board = pci_get_drvdata(pdev);
1277         unsigned long base = board->base;
1278         unsigned int sig, portcount = 0;
1279         int retval = 0;
1280 
1281         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1282                 base);
1283 
1284         inw(base + 0x8);
1285 
1286         msleep(10);
1287 
1288         outw(0, base + 0x8); /* Reset */
1289 
1290         msleep(1000);
1291 
1292         sig = inw(base + 0x4) & 0xff;
1293 
1294         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1295                         sig != 0xee) {
1296                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1297                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1298                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1299                 retval = -EIO;
1300                 goto end;
1301         }
1302 
1303         msleep(10);
1304 
1305         portcount = inw(base + 0x2);
1306         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1307                                 portcount != 8 && portcount != 16)) {
1308                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1309                         card + 1);
1310                 retval = -EIO;
1311                 goto end;
1312         }
1313 
1314         switch (sig) {
1315         case 0xa5:
1316         case 0xbb:
1317         case 0xdd:
1318                 board->port_count = (portcount == 4) ? 4 : 8;
1319                 board->shift_count = 12;
1320                 break;
1321         case 0xcc:
1322         case 0xee:
1323                 board->port_count = 16;
1324                 board->shift_count = 11;
1325                 break;
1326         }
1327         dev_info(&pdev->dev, "-Done\n");
1328         *signature = sig;
1329 
1330 end:
1331         return retval;
1332 }
1333 
1334 static int load_firmware(struct pci_dev *pdev,
1335         const unsigned int index, const unsigned int signature)
1336 {
1337         struct isi_board *board = pci_get_drvdata(pdev);
1338         const struct firmware *fw;
1339         unsigned long base = board->base;
1340         unsigned int a;
1341         u16 word_count, status;
1342         int retval = -EIO;
1343         char *name;
1344         u8 *data;
1345 
1346         struct stframe {
1347                 u16     addr;
1348                 u16     count;
1349                 u8      data[0];
1350         } *frame;
1351 
1352         switch (signature) {
1353         case 0xa5:
1354                 name = "isi608.bin";
1355                 break;
1356         case 0xbb:
1357                 name = "isi608em.bin";
1358                 break;
1359         case 0xcc:
1360                 name = "isi616em.bin";
1361                 break;
1362         case 0xdd:
1363                 name = "isi4608.bin";
1364                 break;
1365         case 0xee:
1366                 name = "isi4616.bin";
1367                 break;
1368         default:
1369                 dev_err(&pdev->dev, "Unknown signature.\n");
1370                 goto end;
1371         }
1372 
1373         retval = request_firmware(&fw, name, &pdev->dev);
1374         if (retval)
1375                 goto end;
1376 
1377         retval = -EIO;
1378 
1379         for (frame = (struct stframe *)fw->data;
1380                         frame < (struct stframe *)(fw->data + fw->size);
1381                         frame = (struct stframe *)((u8 *)(frame + 1) +
1382                                 frame->count)) {
1383                 if (WaitTillCardIsFree(base))
1384                         goto errrelfw;
1385 
1386                 outw(0xf0, base);       /* start upload sequence */
1387                 outw(0x00, base);
1388                 outw(frame->addr, base); /* lsb of address */
1389 
1390                 word_count = frame->count / 2 + frame->count % 2;
1391                 outw(word_count, base);
1392                 InterruptTheCard(base);
1393 
1394                 udelay(100); /* 0x2f */
1395 
1396                 if (WaitTillCardIsFree(base))
1397                         goto errrelfw;
1398 
1399                 status = inw(base + 0x4);
1400                 if (status != 0) {
1401                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1402                                  "Address:0x%x\n"
1403                                  "Count:0x%x\n"
1404                                  "Status:0x%x\n",
1405                                  index + 1, frame->addr, frame->count, status);
1406                         goto errrelfw;
1407                 }
1408                 outsw(base, frame->data, word_count);
1409 
1410                 InterruptTheCard(base);
1411 
1412                 udelay(50); /* 0x0f */
1413 
1414                 if (WaitTillCardIsFree(base))
1415                         goto errrelfw;
1416 
1417                 status = inw(base + 0x4);
1418                 if (status != 0) {
1419                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1420                                 "Status:0x%x\n", index + 1, status);
1421                         goto errrelfw;
1422                 }
1423         }
1424 
1425 /* XXX: should we test it by reading it back and comparing with original like
1426  * in load firmware package? */
1427         for (frame = (struct stframe *)fw->data;
1428                         frame < (struct stframe *)(fw->data + fw->size);
1429                         frame = (struct stframe *)((u8 *)(frame + 1) +
1430                                 frame->count)) {
1431                 if (WaitTillCardIsFree(base))
1432                         goto errrelfw;
1433 
1434                 outw(0xf1, base); /* start download sequence */
1435                 outw(0x00, base);
1436                 outw(frame->addr, base); /* lsb of address */
1437 
1438                 word_count = (frame->count >> 1) + frame->count % 2;
1439                 outw(word_count + 1, base);
1440                 InterruptTheCard(base);
1441 
1442                 udelay(50); /* 0xf */
1443 
1444                 if (WaitTillCardIsFree(base))
1445                         goto errrelfw;
1446 
1447                 status = inw(base + 0x4);
1448                 if (status != 0) {
1449                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1450                                  "Address:0x%x\n"
1451                                  "Count:0x%x\n"
1452                                  "Status: 0x%x\n",
1453                                  index + 1, frame->addr, frame->count, status);
1454                         goto errrelfw;
1455                 }
1456 
1457                 data = kmalloc_array(word_count, 2, GFP_KERNEL);
1458                 if (data == NULL) {
1459                         dev_err(&pdev->dev, "Card%d, firmware upload "
1460                                 "failed, not enough memory\n", index + 1);
1461                         goto errrelfw;
1462                 }
1463                 inw(base);
1464                 insw(base, data, word_count);
1465                 InterruptTheCard(base);
1466 
1467                 for (a = 0; a < frame->count; a++)
1468                         if (data[a] != frame->data[a]) {
1469                                 kfree(data);
1470                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1471                                         "failed\n", index + 1);
1472                                 goto errrelfw;
1473                         }
1474                 kfree(data);
1475 
1476                 udelay(50); /* 0xf */
1477 
1478                 if (WaitTillCardIsFree(base))
1479                         goto errrelfw;
1480 
1481                 status = inw(base + 0x4);
1482                 if (status != 0) {
1483                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1484                                 "Card Status:0x%x\n", index + 1, status);
1485                         goto errrelfw;
1486                 }
1487         }
1488 
1489         /* xfer ctrl */
1490         if (WaitTillCardIsFree(base))
1491                 goto errrelfw;
1492 
1493         outw(0xf2, base);
1494         outw(0x800, base);
1495         outw(0x0, base);
1496         outw(0x0, base);
1497         InterruptTheCard(base);
1498         outw(0x0, base + 0x4); /* for ISI4608 cards */
1499 
1500         board->status |= FIRMWARE_LOADED;
1501         retval = 0;
1502 
1503 errrelfw:
1504         release_firmware(fw);
1505 end:
1506         return retval;
1507 }
1508 
1509 /*
1510  *      Insmod can set static symbols so keep these static
1511  */
1512 static unsigned int card_count;
1513 
1514 static int isicom_probe(struct pci_dev *pdev,
1515         const struct pci_device_id *ent)
1516 {
1517         unsigned int uninitialized_var(signature), index;
1518         int retval = -EPERM;
1519         struct isi_board *board = NULL;
1520 
1521         if (card_count >= BOARD_COUNT)
1522                 goto err;
1523 
1524         retval = pci_enable_device(pdev);
1525         if (retval) {
1526                 dev_err(&pdev->dev, "failed to enable\n");
1527                 goto err;
1528         }
1529 
1530         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1531 
1532         /* allot the first empty slot in the array */
1533         for (index = 0; index < BOARD_COUNT; index++) {
1534                 if (isi_card[index].base == 0) {
1535                         board = &isi_card[index];
1536                         break;
1537                 }
1538         }
1539         if (index == BOARD_COUNT) {
1540                 retval = -ENODEV;
1541                 goto err_disable;
1542         }
1543 
1544         board->index = index;
1545         board->base = pci_resource_start(pdev, 3);
1546         board->irq = pdev->irq;
1547         card_count++;
1548 
1549         pci_set_drvdata(pdev, board);
1550 
1551         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1552         if (retval) {
1553                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1554                         "will be disabled.\n", board->base, board->base + 15,
1555                         index + 1);
1556                 retval = -EBUSY;
1557                 goto errdec;
1558         }
1559 
1560         retval = request_irq(board->irq, isicom_interrupt,
1561                         IRQF_SHARED, ISICOM_NAME, board);
1562         if (retval < 0) {
1563                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1564                         "Card%d will be disabled.\n", board->irq, index + 1);
1565                 goto errunrr;
1566         }
1567 
1568         retval = reset_card(pdev, index, &signature);
1569         if (retval < 0)
1570                 goto errunri;
1571 
1572         retval = load_firmware(pdev, index, signature);
1573         if (retval < 0)
1574                 goto errunri;
1575 
1576         for (index = 0; index < board->port_count; index++) {
1577                 struct tty_port *tport = &board->ports[index].port;
1578                 tty_port_init(tport);
1579                 tport->ops = &isicom_port_ops;
1580                 tport->close_delay = 50 * HZ/100;
1581                 tport->closing_wait = 3000 * HZ/100;
1582                 tty_port_register_device(tport, isicom_normal,
1583                                 board->index * 16 + index, &pdev->dev);
1584         }
1585 
1586         return 0;
1587 
1588 errunri:
1589         free_irq(board->irq, board);
1590 errunrr:
1591         pci_release_region(pdev, 3);
1592 errdec:
1593         board->base = 0;
1594         card_count--;
1595 err_disable:
1596         pci_disable_device(pdev);
1597 err:
1598         return retval;
1599 }
1600 
1601 static void isicom_remove(struct pci_dev *pdev)
1602 {
1603         struct isi_board *board = pci_get_drvdata(pdev);
1604         unsigned int i;
1605 
1606         for (i = 0; i < board->port_count; i++) {
1607                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1608                 tty_port_destroy(&board->ports[i].port);
1609         }
1610 
1611         free_irq(board->irq, board);
1612         pci_release_region(pdev, 3);
1613         board->base = 0;
1614         card_count--;
1615         pci_disable_device(pdev);
1616 }
1617 
1618 static int __init isicom_init(void)
1619 {
1620         int retval, idx, channel;
1621         struct isi_port *port;
1622 
1623         for (idx = 0; idx < BOARD_COUNT; idx++) {
1624                 port = &isi_ports[idx * 16];
1625                 isi_card[idx].ports = port;
1626                 spin_lock_init(&isi_card[idx].card_lock);
1627                 for (channel = 0; channel < 16; channel++, port++) {
1628                         port->magic = ISICOM_MAGIC;
1629                         port->card = &isi_card[idx];
1630                         port->channel = channel;
1631                         port->status = 0;
1632                         /*  . . .  */
1633                 }
1634                 isi_card[idx].base = 0;
1635                 isi_card[idx].irq = 0;
1636         }
1637 
1638         /* tty driver structure initialization */
1639         isicom_normal = alloc_tty_driver(PORT_COUNT);
1640         if (!isicom_normal) {
1641                 retval = -ENOMEM;
1642                 goto error;
1643         }
1644 
1645         isicom_normal->name                     = "ttyM";
1646         isicom_normal->major                    = ISICOM_NMAJOR;
1647         isicom_normal->minor_start              = 0;
1648         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1649         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1650         isicom_normal->init_termios             = tty_std_termios;
1651         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1652                 CLOCAL;
1653         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1654                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1655         tty_set_operations(isicom_normal, &isicom_ops);
1656 
1657         retval = tty_register_driver(isicom_normal);
1658         if (retval) {
1659                 pr_debug("Couldn't register the dialin driver\n");
1660                 goto err_puttty;
1661         }
1662 
1663         retval = pci_register_driver(&isicom_driver);
1664         if (retval < 0) {
1665                 pr_err("Unable to register pci driver.\n");
1666                 goto err_unrtty;
1667         }
1668 
1669         mod_timer(&tx, jiffies + 1);
1670 
1671         return 0;
1672 err_unrtty:
1673         tty_unregister_driver(isicom_normal);
1674 err_puttty:
1675         put_tty_driver(isicom_normal);
1676 error:
1677         return retval;
1678 }
1679 
1680 static void __exit isicom_exit(void)
1681 {
1682         del_timer_sync(&tx);
1683 
1684         pci_unregister_driver(&isicom_driver);
1685         tty_unregister_driver(isicom_normal);
1686         put_tty_driver(isicom_normal);
1687 }
1688 
1689 module_init(isicom_init);
1690 module_exit(isicom_exit);
1691 
1692 MODULE_AUTHOR("MultiTech");
1693 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1694 MODULE_LICENSE("GPL");
1695 MODULE_FIRMWARE("isi608.bin");
1696 MODULE_FIRMWARE("isi608em.bin");
1697 MODULE_FIRMWARE("isi616em.bin");
1698 MODULE_FIRMWARE("isi4608.bin");
1699 MODULE_FIRMWARE("isi4616.bin");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/tty/isicom.c

DEFINITIONS
