drivers/char/mxser_new.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com.tw).
   5  *      Copyright (C) 2006       Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  18  *      - Fixed x86_64 cleanness
  19  *      - Fixed sleep with spinlock held in mxser_send_break
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/autoconf.h>
  24 #include <linux/errno.h>
  25 #include <linux/signal.h>
  26 #include <linux/sched.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serial_reg.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/gfp.h>
  38 #include <linux/ioport.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/delay.h>
  42 #include <linux/pci.h>
  43
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/bitops.h>
  48 #include <asm/uaccess.h>
  49
  50 #include "mxser_new.h"
  51
  52 #define MXSER_VERSION   "2.0"
  53 #define MXSERMAJOR       174
  54 #define MXSERCUMAJOR     175
  55
  56 #define MXSER_EVENT_TXLOW       1
  57
  58 #define MXSER_BOARDS            4       /* Max. boards */
  59 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  60 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  61 #define MXSER_ISR_PASS_LIMIT    99999L
  62
  63 #define MXSER_ERR_IOADDR        -1
  64 #define MXSER_ERR_IRQ           -2
  65 #define MXSER_ERR_IRQ_CONFLIT   -3
  66 #define MXSER_ERR_VECTOR        -4
  67
  68 #define WAKEUP_CHARS            256
  69
  70 #define UART_MCR_AFE            0x20
  71 #define UART_LSR_SPECIAL        0x1E
  72
  73 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  74                                           IXON|IXOFF))
  75
  76 #define C168_ASIC_ID    1
  77 #define C104_ASIC_ID    2
  78 #define C102_ASIC_ID    0xB
  79 #define CI132_ASIC_ID   4
  80 #define CI134_ASIC_ID   3
  81 #define CI104J_ASIC_ID  5
  82
  83 #define MXSER_HIGHBAUD  1
  84 #define MXSER_HAS2      2
  85
  86 /* This is only for PCI */
  87 static const struct {
  88         int type;
  89         int tx_fifo;
  90         int rx_fifo;
  91         int xmit_fifo_size;
  92         int rx_high_water;
  93         int rx_trigger;
  94         int rx_low_water;
  95         long max_baud;
  96 } Gpci_uart_info[] = {
  97         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
  98         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
  99         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 100 };
 101 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 102
 103 struct mxser_cardinfo {
 104         unsigned int nports;
 105         char *name;
 106         unsigned int flags;
 107 };
 108
 109 static const struct mxser_cardinfo mxser_cards[] = {
 110         { 8, "C168 series", },                  /* C168-ISA */
 111         { 4, "C104 series", },                  /* C104-ISA */
 112         { 4, "CI-104J series", },               /* CI104J */
 113         { 8, "C168H/PCI series", },             /* C168-PCI */
 114         { 4, "C104H/PCI series", },             /* C104-PCI */
 115         { 4, "C102 series", MXSER_HAS2 },       /* C102-ISA */
 116         { 4, "CI-132 series", MXSER_HAS2 },     /* CI132 */
 117         { 4, "CI-134 series", },                /* CI134 */
 118         { 2, "CP-132 series", },                /* CP132 */
 119         { 4, "CP-114 series", },                /* CP114 */
 120         { 4, "CT-114 series", },                /* CT114 */
 121         { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
 122         { 4, "CP-104U series", },               /* CP104U */
 123         { 8, "CP-168U series", },               /* CP168U */
 124         { 2, "CP-132U series", },               /* CP132U */
 125         { 4, "CP-134U series", },               /* CP134U */
 126         { 4, "CP-104JU series", },              /* CP104JU */
 127         { 8, "Moxa UC7000 Serial", },           /* RC7000 */
 128         { 8, "CP-118U series", },               /* CP118U */
 129         { 2, "CP-102UL series", },              /* CP102UL */
 130         { 2, "CP-102U series", },               /* CP102U */
 131         { 8, "CP-118EL series", },              /* CP118EL */
 132         { 8, "CP-168EL series", },              /* CP168EL */
 133         { 4, "CP-104EL series", }               /* CP104EL */
 134 };
 135
 136 /* driver_data correspond to the lines in the structure above
 137    see also ISA probe function before you change something */
 138 static struct pci_device_id mxser_pcibrds[] = {
 139         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
 140                 .driver_data = 3 },
 141         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
 142                 .driver_data = 4 },
 143         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
 144                 .driver_data = 8 },
 145         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
 146                 .driver_data = 9 },
 147         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
 148                 .driver_data = 10 },
 149         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
 150                 .driver_data = 11 },
 151         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
 152                 .driver_data = 12 },
 153         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
 154                 .driver_data = 13 },
 155         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
 156                 .driver_data = 14 },
 157         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
 158                 .driver_data = 15 },
 159         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
 160                 .driver_data = 16 },
 161         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
 162                 .driver_data = 17 },
 163         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
 164                 .driver_data = 18 },
 165         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
 166                 .driver_data = 19 },
 167         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
 168                 .driver_data = 20 },
 169         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
 170                 .driver_data = 21 },
 171         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
 172                 .driver_data = 22 },
 173         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
 174                 .driver_data = 23 },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 178
 179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 180 static int ttymajor = MXSERMAJOR;
 181 static int calloutmajor = MXSERCUMAJOR;
 182
 183 /* Variables for insmod */
 184
 185 MODULE_AUTHOR("Casper Yang");
 186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 187 module_param_array(ioaddr, int, NULL, 0);
 188 module_param(ttymajor, int, 0);
 189 MODULE_LICENSE("GPL");
 190
 191 struct mxser_log {
 192         int tick;
 193         unsigned long rxcnt[MXSER_PORTS];
 194         unsigned long txcnt[MXSER_PORTS];
 195 };
 196
 197
 198 struct mxser_mon {
 199         unsigned long rxcnt;
 200         unsigned long txcnt;
 201         unsigned long up_rxcnt;
 202         unsigned long up_txcnt;
 203         int modem_status;
 204         unsigned char hold_reason;
 205 };
 206
 207 struct mxser_mon_ext {
 208         unsigned long rx_cnt[32];
 209         unsigned long tx_cnt[32];
 210         unsigned long up_rxcnt[32];
 211         unsigned long up_txcnt[32];
 212         int modem_status[32];
 213
 214         long baudrate[32];
 215         int databits[32];
 216         int stopbits[32];
 217         int parity[32];
 218         int flowctrl[32];
 219         int fifo[32];
 220         int iftype[32];
 221 };
 222
 223 struct mxser_board;
 224
 225 struct mxser_port {
 226         struct mxser_board *board;
 227         struct tty_struct *tty;
 228
 229         unsigned long ioaddr;
 230         unsigned long opmode_ioaddr;
 231         int max_baud;
 232
 233         int rx_high_water;
 234         int rx_trigger;         /* Rx fifo trigger level */
 235         int rx_low_water;
 236         int baud_base;          /* max. speed */
 237         long realbaud;
 238         int type;               /* UART type */
 239         int flags;              /* defined in tty.h */
 240         long session;           /* Session of opening process */
 241         long pgrp;              /* pgrp of opening process */
 242
 243         int x_char;             /* xon/xoff character */
 244         int IER;                /* Interrupt Enable Register */
 245         int MCR;                /* Modem control register */
 246
 247         unsigned char stop_rx;
 248         unsigned char ldisc_stop_rx;
 249
 250         int custom_divisor;
 251         int close_delay;
 252         unsigned short closing_wait;
 253         unsigned char err_shadow;
 254         unsigned long event;
 255
 256         int count;              /* # of fd on device */
 257         int blocked_open;       /* # of blocked opens */
 258         struct async_icount icount; /* kernel counters for 4 input interrupts */
 259         int timeout;
 260
 261         int read_status_mask;
 262         int ignore_status_mask;
 263         int xmit_fifo_size;
 264         unsigned char *xmit_buf;
 265         int xmit_head;
 266         int xmit_tail;
 267         int xmit_cnt;
 268
 269         struct ktermios normal_termios;
 270         struct ktermios callout_termios;
 271
 272         struct mxser_mon mon_data;
 273
 274         spinlock_t slock;
 275         struct work_struct tqueue;
 276         wait_queue_head_t open_wait;
 277         wait_queue_head_t close_wait;
 278         wait_queue_head_t delta_msr_wait;
 279 };
 280
 281 struct mxser_board {
 282         unsigned int idx;
 283         int irq;
 284         const struct mxser_cardinfo *info;
 285         unsigned long vector;
 286         unsigned long vector_mask;
 287
 288         int chip_flag;
 289         int uart_type;
 290
 291         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 292 };
 293
 294 struct mxser_mstatus {
 295         tcflag_t cflag;
 296         int cts;
 297         int dsr;
 298         int ri;
 299         int dcd;
 300 };
 301
 302 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 303
 304 static int mxserBoardCAP[MXSER_BOARDS] = {
 305         0, 0, 0, 0
 306         /*  0x180, 0x280, 0x200, 0x320 */
 307 };
 308
 309 static struct mxser_board mxser_boards[MXSER_BOARDS];
 310 static struct tty_driver *mxvar_sdriver;
 311 static struct mxser_log mxvar_log;
 312 static int mxvar_diagflag;
 313 static unsigned char mxser_msr[MXSER_PORTS + 1];
 314 static struct mxser_mon_ext mon_data_ext;
 315 static int mxser_set_baud_method[MXSER_PORTS + 1];
 316 static spinlock_t gm_lock;
 317
 318 static int CheckIsMoxaMust(int io)
 319 {
 320         u8 oldmcr, hwid;
 321         int i;
 322
 323         outb(0, io + UART_LCR);
 324         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 325         oldmcr = inb(io + UART_MCR);
 326         outb(0, io + UART_MCR);
 327         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 328         if ((hwid = inb(io + UART_MCR)) != 0) {
 329                 outb(oldmcr, io + UART_MCR);
 330                 return MOXA_OTHER_UART;
 331         }
 332
 333         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 334         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 335                 if (hwid == Gpci_uart_info[i].type)
 336                         return (int)hwid;
 337         }
 338         return MOXA_OTHER_UART;
 339 }
 340
 341 static void process_txrx_fifo(struct mxser_port *info)
 342 {
 343         int i;
 344
 345         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 346                 info->rx_trigger = 1;
 347                 info->rx_high_water = 1;
 348                 info->rx_low_water = 1;
 349                 info->xmit_fifo_size = 1;
 350         } else
 351                 for (i = 0; i < UART_INFO_NUM; i++)
 352                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 353                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 354                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 355                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 356                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 357                                 break;
 358                         }
 359 }
 360
 361 static void mxser_do_softint(struct work_struct *work)
 362 {
 363         struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
 364         struct tty_struct *tty = info->tty;
 365
 366         if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 367                 tty_wakeup(tty);
 368 }
 369
 370 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 371 {
 372         unsigned char status = 0;
 373
 374         status = inb(baseaddr + UART_MSR);
 375
 376         mxser_msr[port] &= 0x0F;
 377         mxser_msr[port] |= status;
 378         status = mxser_msr[port];
 379         if (mode)
 380                 mxser_msr[port] = 0;
 381
 382         return status;
 383 }
 384
 385 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 386                 struct mxser_port *port)
 387 {
 388         DECLARE_WAITQUEUE(wait, current);
 389         int retval;
 390         int do_clocal = 0;
 391         unsigned long flags;
 392
 393         /*
 394          * If non-blocking mode is set, or the port is not enabled,
 395          * then make the check up front and then exit.
 396          */
 397         if ((filp->f_flags & O_NONBLOCK) ||
 398                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 399                 port->flags |= ASYNC_NORMAL_ACTIVE;
 400                 return 0;
 401         }
 402
 403         if (tty->termios->c_cflag & CLOCAL)
 404                 do_clocal = 1;
 405
 406         /*
 407          * Block waiting for the carrier detect and the line to become
 408          * free (i.e., not in use by the callout).  While we are in
 409          * this loop, port->count is dropped by one, so that
 410          * mxser_close() knows when to free things.  We restore it upon
 411          * exit, either normal or abnormal.
 412          */
 413         retval = 0;
 414         add_wait_queue(&port->open_wait, &wait);
 415
 416         spin_lock_irqsave(&port->slock, flags);
 417         if (!tty_hung_up_p(filp))
 418                 port->count--;
 419         spin_unlock_irqrestore(&port->slock, flags);
 420         port->blocked_open++;
 421         while (1) {
 422                 spin_lock_irqsave(&port->slock, flags);
 423                 outb(inb(port->ioaddr + UART_MCR) |
 424                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 425                 spin_unlock_irqrestore(&port->slock, flags);
 426                 set_current_state(TASK_INTERRUPTIBLE);
 427                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 428                         if (port->flags & ASYNC_HUP_NOTIFY)
 429                                 retval = -EAGAIN;
 430                         else
 431                                 retval = -ERESTARTSYS;
 432                         break;
 433                 }
 434                 if (!(port->flags & ASYNC_CLOSING) &&
 435                                 (do_clocal ||
 436                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 437                         break;
 438                 if (signal_pending(current)) {
 439                         retval = -ERESTARTSYS;
 440                         break;
 441                 }
 442                 schedule();
 443         }
 444         set_current_state(TASK_RUNNING);
 445         remove_wait_queue(&port->open_wait, &wait);
 446         if (!tty_hung_up_p(filp))
 447                 port->count++;
 448         port->blocked_open--;
 449         if (retval)
 450                 return retval;
 451         port->flags |= ASYNC_NORMAL_ACTIVE;
 452         return 0;
 453 }
 454
 455 static int mxser_set_baud(struct mxser_port *info, long newspd)
 456 {
 457         int quot = 0;
 458         unsigned char cval;
 459         int ret = 0;
 460         unsigned long flags;
 461
 462         if (!info->tty || !info->tty->termios)
 463                 return ret;
 464
 465         if (!(info->ioaddr))
 466                 return ret;
 467
 468         if (newspd > info->max_baud)
 469                 return 0;
 470
 471         info->realbaud = newspd;
 472         if (newspd == 134) {
 473                 quot = (2 * info->baud_base / 269);
 474         } else if (newspd) {
 475                 quot = info->baud_base / newspd;
 476                 if (quot == 0)
 477                         quot = 1;
 478         } else {
 479                 quot = 0;
 480         }
 481
 482         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 483         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 484
 485         if (quot) {
 486                 spin_lock_irqsave(&info->slock, flags);
 487                 info->MCR |= UART_MCR_DTR;
 488                 outb(info->MCR, info->ioaddr + UART_MCR);
 489                 spin_unlock_irqrestore(&info->slock, flags);
 490         } else {
 491                 spin_lock_irqsave(&info->slock, flags);
 492                 info->MCR &= ~UART_MCR_DTR;
 493                 outb(info->MCR, info->ioaddr + UART_MCR);
 494                 spin_unlock_irqrestore(&info->slock, flags);
 495                 return ret;
 496         }
 497
 498         cval = inb(info->ioaddr + UART_LCR);
 499
 500         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 501
 502         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 503         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 504         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 505
 506
 507         return ret;
 508 }
 509
 510 /*
 511  * This routine is called to set the UART divisor registers to match
 512  * the specified baud rate for a serial port.
 513  */
 514 static int mxser_change_speed(struct mxser_port *info,
 515                 struct ktermios *old_termios)
 516 {
 517         unsigned cflag, cval, fcr;
 518         int ret = 0;
 519         unsigned char status;
 520         long baud;
 521         unsigned long flags;
 522
 523         if (!info->tty || !info->tty->termios)
 524                 return ret;
 525         cflag = info->tty->termios->c_cflag;
 526         if (!(info->ioaddr))
 527                 return ret;
 528
 529         if (mxser_set_baud_method[info->tty->index] == 0) {
 530                 baud = tty_get_baud_rate(info->tty);
 531                 mxser_set_baud(info, baud);
 532         }
 533
 534         /* byte size and parity */
 535         switch (cflag & CSIZE) {
 536         case CS5:
 537                 cval = 0x00;
 538                 break;
 539         case CS6:
 540                 cval = 0x01;
 541                 break;
 542         case CS7:
 543                 cval = 0x02;
 544                 break;
 545         case CS8:
 546                 cval = 0x03;
 547                 break;
 548         default:
 549                 cval = 0x00;
 550                 break;          /* too keep GCC shut... */
 551         }
 552         if (cflag & CSTOPB)
 553                 cval |= 0x04;
 554         if (cflag & PARENB)
 555                 cval |= UART_LCR_PARITY;
 556         if (!(cflag & PARODD))
 557                 cval |= UART_LCR_EPAR;
 558         if (cflag & CMSPAR)
 559                 cval |= UART_LCR_SPAR;
 560
 561         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 562                 if (info->board->chip_flag) {
 563                         fcr = UART_FCR_ENABLE_FIFO;
 564                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 565                         SET_MOXA_MUST_FIFO_VALUE(info);
 566                 } else
 567                         fcr = 0;
 568         } else {
 569                 fcr = UART_FCR_ENABLE_FIFO;
 570                 if (info->board->chip_flag) {
 571                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 572                         SET_MOXA_MUST_FIFO_VALUE(info);
 573                 } else {
 574                         switch (info->rx_trigger) {
 575                         case 1:
 576                                 fcr |= UART_FCR_TRIGGER_1;
 577                                 break;
 578                         case 4:
 579                                 fcr |= UART_FCR_TRIGGER_4;
 580                                 break;
 581                         case 8:
 582                                 fcr |= UART_FCR_TRIGGER_8;
 583                                 break;
 584                         default:
 585                                 fcr |= UART_FCR_TRIGGER_14;
 586                                 break;
 587                         }
 588                 }
 589         }
 590
 591         /* CTS flow control flag and modem status interrupts */
 592         info->IER &= ~UART_IER_MSI;
 593         info->MCR &= ~UART_MCR_AFE;
 594         if (cflag & CRTSCTS) {
 595                 info->flags |= ASYNC_CTS_FLOW;
 596                 info->IER |= UART_IER_MSI;
 597                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 598                         info->MCR |= UART_MCR_AFE;
 599                 } else {
 600                         status = inb(info->ioaddr + UART_MSR);
 601                         if (info->tty->hw_stopped) {
 602                                 if (status & UART_MSR_CTS) {
 603                                         info->tty->hw_stopped = 0;
 604                                         if (info->type != PORT_16550A &&
 605                                                         !info->board->chip_flag) {
 606                                                 outb(info->IER & ~UART_IER_THRI,
 607                                                         info->ioaddr +
 608                                                         UART_IER);
 609                                                 info->IER |= UART_IER_THRI;
 610                                                 outb(info->IER, info->ioaddr +
 611                                                                 UART_IER);
 612                                         }
 613                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
 614                                         schedule_work(&info->tqueue);                           }
 615                         } else {
 616                                 if (!(status & UART_MSR_CTS)) {
 617                                         info->tty->hw_stopped = 1;
 618                                         if ((info->type != PORT_16550A) &&
 619                                                         (!info->board->chip_flag)) {
 620                                                 info->IER &= ~UART_IER_THRI;
 621                                                 outb(info->IER, info->ioaddr +
 622                                                                 UART_IER);
 623                                         }
 624                                 }
 625                         }
 626                 }
 627         } else {
 628                 info->flags &= ~ASYNC_CTS_FLOW;
 629         }
 630         outb(info->MCR, info->ioaddr + UART_MCR);
 631         if (cflag & CLOCAL) {
 632                 info->flags &= ~ASYNC_CHECK_CD;
 633         } else {
 634                 info->flags |= ASYNC_CHECK_CD;
 635                 info->IER |= UART_IER_MSI;
 636         }
 637         outb(info->IER, info->ioaddr + UART_IER);
 638
 639         /*
 640          * Set up parity check flag
 641          */
 642         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 643         if (I_INPCK(info->tty))
 644                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 645         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 646                 info->read_status_mask |= UART_LSR_BI;
 647
 648         info->ignore_status_mask = 0;
 649
 650         if (I_IGNBRK(info->tty)) {
 651                 info->ignore_status_mask |= UART_LSR_BI;
 652                 info->read_status_mask |= UART_LSR_BI;
 653                 /*
 654                  * If we're ignore parity and break indicators, ignore
 655                  * overruns too.  (For real raw support).
 656                  */
 657                 if (I_IGNPAR(info->tty)) {
 658                         info->ignore_status_mask |=
 659                                                 UART_LSR_OE |
 660                                                 UART_LSR_PE |
 661                                                 UART_LSR_FE;
 662                         info->read_status_mask |=
 663                                                 UART_LSR_OE |
 664                                                 UART_LSR_PE |
 665                                                 UART_LSR_FE;
 666                 }
 667         }
 668         if (info->board->chip_flag) {
 669                 spin_lock_irqsave(&info->slock, flags);
 670                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 671                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 672                 if (I_IXON(info->tty)) {
 673                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 674                 } else {
 675                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 676                 }
 677                 if (I_IXOFF(info->tty)) {
 678                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 679                 } else {
 680                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 681                 }
 682                 spin_unlock_irqrestore(&info->slock, flags);
 683         }
 684
 685
 686         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 687         outb(cval, info->ioaddr + UART_LCR);
 688
 689         return ret;
 690 }
 691
 692 static void mxser_check_modem_status(struct mxser_port *port, int status)
 693 {
 694         /* update input line counters */
 695         if (status & UART_MSR_TERI)
 696                 port->icount.rng++;
 697         if (status & UART_MSR_DDSR)
 698                 port->icount.dsr++;
 699         if (status & UART_MSR_DDCD)
 700                 port->icount.dcd++;
 701         if (status & UART_MSR_DCTS)
 702                 port->icount.cts++;
 703         port->mon_data.modem_status = status;
 704         wake_up_interruptible(&port->delta_msr_wait);
 705
 706         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 707                 if (status & UART_MSR_DCD)
 708                         wake_up_interruptible(&port->open_wait);
 709                 schedule_work(&port->tqueue);
 710         }
 711
 712         if (port->flags & ASYNC_CTS_FLOW) {
 713                 if (port->tty->hw_stopped) {
 714                         if (status & UART_MSR_CTS) {
 715                                 port->tty->hw_stopped = 0;
 716
 717                                 if ((port->type != PORT_16550A) &&
 718                                                 (!port->board->chip_flag)) {
 719                                         outb(port->IER & ~UART_IER_THRI,
 720                                                 port->ioaddr + UART_IER);
 721                                         port->IER |= UART_IER_THRI;
 722                                         outb(port->IER, port->ioaddr +
 723                                                         UART_IER);
 724                                 }
 725                                 set_bit(MXSER_EVENT_TXLOW, &port->event);
 726                                 schedule_work(&port->tqueue);
 727                         }
 728                 } else {
 729                         if (!(status & UART_MSR_CTS)) {
 730                                 port->tty->hw_stopped = 1;
 731                                 if (port->type != PORT_16550A &&
 732                                                 !port->board->chip_flag) {
 733                                         port->IER &= ~UART_IER_THRI;
 734                                         outb(port->IER, port->ioaddr +
 735                                                         UART_IER);
 736                                 }
 737                         }
 738                 }
 739         }
 740 }
 741
 742 static int mxser_startup(struct mxser_port *info)
 743 {
 744         unsigned long page;
 745         unsigned long flags;
 746
 747         page = __get_free_page(GFP_KERNEL);
 748         if (!page)
 749                 return -ENOMEM;
 750
 751         spin_lock_irqsave(&info->slock, flags);
 752
 753         if (info->flags & ASYNC_INITIALIZED) {
 754                 free_page(page);
 755                 spin_unlock_irqrestore(&info->slock, flags);
 756                 return 0;
 757         }
 758
 759         if (!info->ioaddr || !info->type) {
 760                 if (info->tty)
 761                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 762                 free_page(page);
 763                 spin_unlock_irqrestore(&info->slock, flags);
 764                 return 0;
 765         }
 766         if (info->xmit_buf)
 767                 free_page(page);
 768         else
 769                 info->xmit_buf = (unsigned char *) page;
 770
 771         /*
 772          * Clear the FIFO buffers and disable them
 773          * (they will be reenabled in mxser_change_speed())
 774          */
 775         if (info->board->chip_flag)
 776                 outb((UART_FCR_CLEAR_RCVR |
 777                         UART_FCR_CLEAR_XMIT |
 778                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 779         else
 780                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 781                         info->ioaddr + UART_FCR);
 782
 783         /*
 784          * At this point there's no way the LSR could still be 0xFF;
 785          * if it is, then bail out, because there's likely no UART
 786          * here.
 787          */
 788         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 789                 spin_unlock_irqrestore(&info->slock, flags);
 790                 if (capable(CAP_SYS_ADMIN)) {
 791                         if (info->tty)
 792                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 793                         return 0;
 794                 } else
 795                         return -ENODEV;
 796         }
 797
 798         /*
 799          * Clear the interrupt registers.
 800          */
 801         (void) inb(info->ioaddr + UART_LSR);
 802         (void) inb(info->ioaddr + UART_RX);
 803         (void) inb(info->ioaddr + UART_IIR);
 804         (void) inb(info->ioaddr + UART_MSR);
 805
 806         /*
 807          * Now, initialize the UART
 808          */
 809         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 810         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 811         outb(info->MCR, info->ioaddr + UART_MCR);
 812
 813         /*
 814          * Finally, enable interrupts
 815          */
 816         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 817
 818         if (info->board->chip_flag)
 819                 info->IER |= MOXA_MUST_IER_EGDAI;
 820         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 821
 822         /*
 823          * And clear the interrupt registers again for luck.
 824          */
 825         (void) inb(info->ioaddr + UART_LSR);
 826         (void) inb(info->ioaddr + UART_RX);
 827         (void) inb(info->ioaddr + UART_IIR);
 828         (void) inb(info->ioaddr + UART_MSR);
 829
 830         if (info->tty)
 831                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 832         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 833
 834         /*
 835          * and set the speed of the serial port
 836          */
 837         spin_unlock_irqrestore(&info->slock, flags);
 838         mxser_change_speed(info, NULL);
 839
 840         info->flags |= ASYNC_INITIALIZED;
 841         return 0;
 842 }
 843
 844 /*
 845  * This routine will shutdown a serial port; interrupts maybe disabled, and
 846  * DTR is dropped if the hangup on close termio flag is on.
 847  */
 848 static void mxser_shutdown(struct mxser_port *info)
 849 {
 850         unsigned long flags;
 851
 852         if (!(info->flags & ASYNC_INITIALIZED))
 853                 return;
 854
 855         spin_lock_irqsave(&info->slock, flags);
 856
 857         /*
 858          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 859          * here so the queue might never be waken up
 860          */
 861         wake_up_interruptible(&info->delta_msr_wait);
 862
 863         /*
 864          * Free the IRQ, if necessary
 865          */
 866         if (info->xmit_buf) {
 867                 free_page((unsigned long) info->xmit_buf);
 868                 info->xmit_buf = NULL;
 869         }
 870
 871         info->IER = 0;
 872         outb(0x00, info->ioaddr + UART_IER);
 873
 874         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 875                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 876         outb(info->MCR, info->ioaddr + UART_MCR);
 877
 878         /* clear Rx/Tx FIFO's */
 879         if (info->board->chip_flag)
 880                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 881                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 882                                 info->ioaddr + UART_FCR);
 883         else
 884                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 885                         info->ioaddr + UART_FCR);
 886
 887         /* read data port to reset things */
 888         (void) inb(info->ioaddr + UART_RX);
 889
 890         if (info->tty)
 891                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 892
 893         info->flags &= ~ASYNC_INITIALIZED;
 894
 895         if (info->board->chip_flag)
 896                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 897
 898         spin_unlock_irqrestore(&info->slock, flags);
 899 }
 900
 901 /*
 902  * This routine is called whenever a serial port is opened.  It
 903  * enables interrupts for a serial port, linking in its async structure into
 904  * the IRQ chain.   It also performs the serial-specific
 905  * initialization for the tty structure.
 906  */
 907 static int mxser_open(struct tty_struct *tty, struct file *filp)
 908 {
 909         struct mxser_port *info;
 910         int retval, line;
 911
 912         /* initialize driver_data in case something fails */
 913         tty->driver_data = NULL;
 914
 915         line = tty->index;
 916         if (line == MXSER_PORTS)
 917                 return 0;
 918         if (line < 0 || line > MXSER_PORTS)
 919                 return -ENODEV;
 920         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 921         if (!info->ioaddr)
 922                 return -ENODEV;
 923
 924         tty->driver_data = info;
 925         info->tty = tty;
 926         /*
 927          * Start up serial port
 928          */
 929         info->count++;
 930         retval = mxser_startup(info);
 931         if (retval)
 932                 return retval;
 933
 934         retval = mxser_block_til_ready(tty, filp, info);
 935         if (retval)
 936                 return retval;
 937
 938         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 939                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 940                         *tty->termios = info->normal_termios;
 941                 else
 942                         *tty->termios = info->callout_termios;
 943                 mxser_change_speed(info, NULL);
 944         }
 945
 946         info->session = process_session(current);
 947         info->pgrp = process_group(current);
 948
 949         /* unmark here for very high baud rate (ex. 921600 bps) used */
 950         tty->low_latency = 1;
 951         return 0;
 952 }
 953
 954 /*
 955  * This routine is called when the serial port gets closed.  First, we
 956  * wait for the last remaining data to be sent.  Then, we unlink its
 957  * async structure from the interrupt chain if necessary, and we free
 958  * that IRQ if nothing is left in the chain.
 959  */
 960 static void mxser_close(struct tty_struct *tty, struct file *filp)
 961 {
 962         struct mxser_port *info = tty->driver_data;
 963
 964         unsigned long timeout;
 965         unsigned long flags;
 966
 967         if (tty->index == MXSER_PORTS)
 968                 return;
 969         if (!info)
 970                 return;
 971
 972         spin_lock_irqsave(&info->slock, flags);
 973
 974         if (tty_hung_up_p(filp)) {
 975                 spin_unlock_irqrestore(&info->slock, flags);
 976                 return;
 977         }
 978         if ((tty->count == 1) && (info->count != 1)) {
 979                 /*
 980                  * Uh, oh.  tty->count is 1, which means that the tty
 981                  * structure will be freed.  Info->count should always
 982                  * be one in these conditions.  If it's greater than
 983                  * one, we've got real problems, since it means the
 984                  * serial port won't be shutdown.
 985                  */
 986                 printk(KERN_ERR "mxser_close: bad serial port count; "
 987                         "tty->count is 1, info->count is %d\n", info->count);
 988                 info->count = 1;
 989         }
 990         if (--info->count < 0) {
 991                 printk(KERN_ERR "mxser_close: bad serial port count for "
 992                         "ttys%d: %d\n", tty->index, info->count);
 993                 info->count = 0;
 994         }
 995         if (info->count) {
 996                 spin_unlock_irqrestore(&info->slock, flags);
 997                 return;
 998         }
 999         info->flags |= ASYNC_CLOSING;
1000         spin_unlock_irqrestore(&info->slock, flags);
1001         /*
1002          * Save the termios structure, since this port may have
1003          * separate termios for callout and dialin.
1004          */
1005         if (info->flags & ASYNC_NORMAL_ACTIVE)
1006                 info->normal_termios = *tty->termios;
1007         /*
1008          * Now we wait for the transmit buffer to clear; and we notify
1009          * the line discipline to only process XON/XOFF characters.
1010          */
1011         tty->closing = 1;
1012         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1013                 tty_wait_until_sent(tty, info->closing_wait);
1014         /*
1015          * At this point we stop accepting input.  To do this, we
1016          * disable the receive line status interrupts, and tell the
1017          * interrupt driver to stop checking the data ready bit in the
1018          * line status register.
1019          */
1020         info->IER &= ~UART_IER_RLSI;
1021         if (info->board->chip_flag)
1022                 info->IER &= ~MOXA_MUST_RECV_ISR;
1023
1024         if (info->flags & ASYNC_INITIALIZED) {
1025                 outb(info->IER, info->ioaddr + UART_IER);
1026                 /*
1027                  * Before we drop DTR, make sure the UART transmitter
1028                  * has completely drained; this is especially
1029                  * important if there is a transmit FIFO!
1030                  */
1031                 timeout = jiffies + HZ;
1032                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1033                         schedule_timeout_interruptible(5);
1034                         if (time_after(jiffies, timeout))
1035                                 break;
1036                 }
1037         }
1038         mxser_shutdown(info);
1039
1040         if (tty->driver->flush_buffer)
1041                 tty->driver->flush_buffer(tty);
1042
1043         tty_ldisc_flush(tty);
1044
1045         tty->closing = 0;
1046         info->event = 0;
1047         info->tty = NULL;
1048         if (info->blocked_open) {
1049                 if (info->close_delay)
1050                         schedule_timeout_interruptible(info->close_delay);
1051                 wake_up_interruptible(&info->open_wait);
1052         }
1053
1054         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1055         wake_up_interruptible(&info->close_wait);
1056
1057 }
1058
1059 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1060 {
1061         int c, total = 0;
1062         struct mxser_port *info = tty->driver_data;
1063         unsigned long flags;
1064
1065         if (!info->xmit_buf)
1066                 return 0;
1067
1068         while (1) {
1069                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1070                                           SERIAL_XMIT_SIZE - info->xmit_head));
1071                 if (c <= 0)
1072                         break;
1073
1074                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1075                 spin_lock_irqsave(&info->slock, flags);
1076                 info->xmit_head = (info->xmit_head + c) &
1077                                   (SERIAL_XMIT_SIZE - 1);
1078                 info->xmit_cnt += c;
1079                 spin_unlock_irqrestore(&info->slock, flags);
1080
1081                 buf += c;
1082                 count -= c;
1083                 total += c;
1084         }
1085
1086         if (info->xmit_cnt && !tty->stopped) {
1087                 if (!tty->hw_stopped ||
1088                                 (info->type == PORT_16550A) ||
1089                                 (info->board->chip_flag)) {
1090                         spin_lock_irqsave(&info->slock, flags);
1091                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1092                                         UART_IER);
1093                         info->IER |= UART_IER_THRI;
1094                         outb(info->IER, info->ioaddr + UART_IER);
1095                         spin_unlock_irqrestore(&info->slock, flags);
1096                 }
1097         }
1098         return total;
1099 }
1100
1101 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1102 {
1103         struct mxser_port *info = tty->driver_data;
1104         unsigned long flags;
1105
1106         if (!info->xmit_buf)
1107                 return;
1108
1109         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1110                 return;
1111
1112         spin_lock_irqsave(&info->slock, flags);
1113         info->xmit_buf[info->xmit_head++] = ch;
1114         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1115         info->xmit_cnt++;
1116         spin_unlock_irqrestore(&info->slock, flags);
1117         if (!tty->stopped) {
1118                 if (!tty->hw_stopped ||
1119                                 (info->type == PORT_16550A) ||
1120                                 info->board->chip_flag) {
1121                         spin_lock_irqsave(&info->slock, flags);
1122                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1123                         info->IER |= UART_IER_THRI;
1124                         outb(info->IER, info->ioaddr + UART_IER);
1125                         spin_unlock_irqrestore(&info->slock, flags);
1126                 }
1127         }
1128 }
1129
1130
1131 static void mxser_flush_chars(struct tty_struct *tty)
1132 {
1133         struct mxser_port *info = tty->driver_data;
1134         unsigned long flags;
1135
1136         if (info->xmit_cnt <= 0 ||
1137                         tty->stopped ||
1138                         !info->xmit_buf ||
1139                         (tty->hw_stopped &&
1140                          (info->type != PORT_16550A) &&
1141                          (!info->board->chip_flag)
1142                         ))
1143                 return;
1144
1145         spin_lock_irqsave(&info->slock, flags);
1146
1147         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1148         info->IER |= UART_IER_THRI;
1149         outb(info->IER, info->ioaddr + UART_IER);
1150
1151         spin_unlock_irqrestore(&info->slock, flags);
1152 }
1153
1154 static int mxser_write_room(struct tty_struct *tty)
1155 {
1156         struct mxser_port *info = tty->driver_data;
1157         int ret;
1158
1159         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1160         if (ret < 0)
1161                 ret = 0;
1162         return ret;
1163 }
1164
1165 static int mxser_chars_in_buffer(struct tty_struct *tty)
1166 {
1167         struct mxser_port *info = tty->driver_data;
1168         return info->xmit_cnt;
1169 }
1170
1171 static void mxser_flush_buffer(struct tty_struct *tty)
1172 {
1173         struct mxser_port *info = tty->driver_data;
1174         char fcr;
1175         unsigned long flags;
1176
1177
1178         spin_lock_irqsave(&info->slock, flags);
1179         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1180
1181         fcr = inb(info->ioaddr + UART_FCR);
1182         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1183                 info->ioaddr + UART_FCR);
1184         outb(fcr, info->ioaddr + UART_FCR);
1185
1186         spin_unlock_irqrestore(&info->slock, flags);
1187
1188         tty_wakeup(tty);
1189 }
1190
1191 /*
1192  * ------------------------------------------------------------
1193  * friends of mxser_ioctl()
1194  * ------------------------------------------------------------
1195  */
1196 static int mxser_get_serial_info(struct mxser_port *info,
1197                 struct serial_struct __user *retinfo)
1198 {
1199         struct serial_struct tmp;
1200
1201         if (!retinfo)
1202                 return -EFAULT;
1203         memset(&tmp, 0, sizeof(tmp));
1204         tmp.type = info->type;
1205         tmp.line = info->tty->index;
1206         tmp.port = info->ioaddr;
1207         tmp.irq = info->board->irq;
1208         tmp.flags = info->flags;
1209         tmp.baud_base = info->baud_base;
1210         tmp.close_delay = info->close_delay;
1211         tmp.closing_wait = info->closing_wait;
1212         tmp.custom_divisor = info->custom_divisor;
1213         tmp.hub6 = 0;
1214         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1215                 return -EFAULT;
1216         return 0;
1217 }
1218
1219 static int mxser_set_serial_info(struct mxser_port *info,
1220                 struct serial_struct __user *new_info)
1221 {
1222         struct serial_struct new_serial;
1223         unsigned int flags;
1224         int retval = 0;
1225
1226         if (!new_info || !info->ioaddr)
1227                 return -EFAULT;
1228         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1229                 return -EFAULT;
1230
1231         if ((new_serial.irq != info->board->irq) ||
1232                         (new_serial.port != info->ioaddr) ||
1233                         (new_serial.custom_divisor != info->custom_divisor) ||
1234                         (new_serial.baud_base != info->baud_base))
1235                 return -EPERM;
1236
1237         flags = info->flags & ASYNC_SPD_MASK;
1238
1239         if (!capable(CAP_SYS_ADMIN)) {
1240                 if ((new_serial.baud_base != info->baud_base) ||
1241                                 (new_serial.close_delay != info->close_delay) ||
1242                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1243                         return -EPERM;
1244                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1245                                 (new_serial.flags & ASYNC_USR_MASK));
1246         } else {
1247                 /*
1248                  * OK, past this point, all the error checking has been done.
1249                  * At this point, we start making changes.....
1250                  */
1251                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1252                                 (new_serial.flags & ASYNC_FLAGS));
1253                 info->close_delay = new_serial.close_delay * HZ / 100;
1254                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1255                 info->tty->low_latency =
1256                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1257                 info->tty->low_latency = 0;
1258         }
1259
1260         info->type = new_serial.type;
1261
1262         process_txrx_fifo(info);
1263
1264         if (info->flags & ASYNC_INITIALIZED) {
1265                 if (flags != (info->flags & ASYNC_SPD_MASK))
1266                         mxser_change_speed(info, NULL);
1267         } else
1268                 retval = mxser_startup(info);
1269
1270         return retval;
1271 }
1272
1273 /*
1274  * mxser_get_lsr_info - get line status register info
1275  *
1276  * Purpose: Let user call ioctl() to get info when the UART physically
1277  *          is emptied.  On bus types like RS485, the transmitter must
1278  *          release the bus after transmitting. This must be done when
1279  *          the transmit shift register is empty, not be done when the
1280  *          transmit holding register is empty.  This functionality
1281  *          allows an RS485 driver to be written in user space.
1282  */
1283 static int mxser_get_lsr_info(struct mxser_port *info,
1284                 unsigned int __user *value)
1285 {
1286         unsigned char status;
1287         unsigned int result;
1288         unsigned long flags;
1289
1290         spin_lock_irqsave(&info->slock, flags);
1291         status = inb(info->ioaddr + UART_LSR);
1292         spin_unlock_irqrestore(&info->slock, flags);
1293         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1294         return put_user(result, value);
1295 }
1296
1297 /*
1298  * This routine sends a break character out the serial port.
1299  */
1300 static void mxser_send_break(struct mxser_port *info, int duration)
1301 {
1302         unsigned long flags;
1303
1304         if (!info->ioaddr)
1305                 return;
1306         set_current_state(TASK_INTERRUPTIBLE);
1307         spin_lock_irqsave(&info->slock, flags);
1308         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1309                 info->ioaddr + UART_LCR);
1310         spin_unlock_irqrestore(&info->slock, flags);
1311         schedule_timeout(duration);
1312         spin_lock_irqsave(&info->slock, flags);
1313         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1314                 info->ioaddr + UART_LCR);
1315         spin_unlock_irqrestore(&info->slock, flags);
1316 }
1317
1318 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1319 {
1320         struct mxser_port *info = tty->driver_data;
1321         unsigned char control, status;
1322         unsigned long flags;
1323
1324
1325         if (tty->index == MXSER_PORTS)
1326                 return -ENOIOCTLCMD;
1327         if (test_bit(TTY_IO_ERROR, &tty->flags))
1328                 return -EIO;
1329
1330         control = info->MCR;
1331
1332         spin_lock_irqsave(&info->slock, flags);
1333         status = inb(info->ioaddr + UART_MSR);
1334         if (status & UART_MSR_ANY_DELTA)
1335                 mxser_check_modem_status(info, status);
1336         spin_unlock_irqrestore(&info->slock, flags);
1337         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1338                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1339                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1340                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1341                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1342                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1343 }
1344
1345 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1346                 unsigned int set, unsigned int clear)
1347 {
1348         struct mxser_port *info = tty->driver_data;
1349         unsigned long flags;
1350
1351
1352         if (tty->index == MXSER_PORTS)
1353                 return -ENOIOCTLCMD;
1354         if (test_bit(TTY_IO_ERROR, &tty->flags))
1355                 return -EIO;
1356
1357         spin_lock_irqsave(&info->slock, flags);
1358
1359         if (set & TIOCM_RTS)
1360                 info->MCR |= UART_MCR_RTS;
1361         if (set & TIOCM_DTR)
1362                 info->MCR |= UART_MCR_DTR;
1363
1364         if (clear & TIOCM_RTS)
1365                 info->MCR &= ~UART_MCR_RTS;
1366         if (clear & TIOCM_DTR)
1367                 info->MCR &= ~UART_MCR_DTR;
1368
1369         outb(info->MCR, info->ioaddr + UART_MCR);
1370         spin_unlock_irqrestore(&info->slock, flags);
1371         return 0;
1372 }
1373
1374 static int mxser_program_mode(int port)
1375 {
1376         int id, i, j, n;
1377
1378         spin_lock(&gm_lock);
1379         outb(0, port);
1380         outb(0, port);
1381         outb(0, port);
1382         (void)inb(port);
1383         (void)inb(port);
1384         outb(0, port);
1385         (void)inb(port);
1386         spin_unlock(&gm_lock);
1387
1388         id = inb(port + 1) & 0x1F;
1389         if ((id != C168_ASIC_ID) &&
1390                         (id != C104_ASIC_ID) &&
1391                         (id != C102_ASIC_ID) &&
1392                         (id != CI132_ASIC_ID) &&
1393                         (id != CI134_ASIC_ID) &&
1394                         (id != CI104J_ASIC_ID))
1395                 return -1;
1396         for (i = 0, j = 0; i < 4; i++) {
1397                 n = inb(port + 2);
1398                 if (n == 'M') {
1399                         j = 1;
1400                 } else if ((j == 1) && (n == 1)) {
1401                         j = 2;
1402                         break;
1403                 } else
1404                         j = 0;
1405         }
1406         if (j != 2)
1407                 id = -2;
1408         return id;
1409 }
1410
1411 static void mxser_normal_mode(int port)
1412 {
1413         int i, n;
1414
1415         outb(0xA5, port + 1);
1416         outb(0x80, port + 3);
1417         outb(12, port + 0);     /* 9600 bps */
1418         outb(0, port + 1);
1419         outb(0x03, port + 3);   /* 8 data bits */
1420         outb(0x13, port + 4);   /* loop back mode */
1421         for (i = 0; i < 16; i++) {
1422                 n = inb(port + 5);
1423                 if ((n & 0x61) == 0x60)
1424                         break;
1425                 if ((n & 1) == 1)
1426                         (void)inb(port);
1427         }
1428         outb(0x00, port + 4);
1429 }
1430
1431 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1432 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1433 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1434 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1435 #define EN_CCMD         0x000   /* Chip's command register     */
1436 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1437 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1438 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1439 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1440 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1441 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1442 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1443 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1444 static int mxser_read_register(int port, unsigned short *regs)
1445 {
1446         int i, k, value, id;
1447         unsigned int j;
1448
1449         id = mxser_program_mode(port);
1450         if (id < 0)
1451                 return id;
1452         for (i = 0; i < 14; i++) {
1453                 k = (i & 0x3F) | 0x180;
1454                 for (j = 0x100; j > 0; j >>= 1) {
1455                         outb(CHIP_CS, port);
1456                         if (k & j) {
1457                                 outb(CHIP_CS | CHIP_DO, port);
1458                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1459                         } else {
1460                                 outb(CHIP_CS, port);
1461                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1462                         }
1463                 }
1464                 (void)inb(port);
1465                 value = 0;
1466                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1467                         outb(CHIP_CS, port);
1468                         outb(CHIP_CS | CHIP_SK, port);
1469                         if (inb(port) & CHIP_DI)
1470                                 value |= j;
1471                 }
1472                 regs[i] = value;
1473                 outb(0, port);
1474         }
1475         mxser_normal_mode(port);
1476         return id;
1477 }
1478
1479 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1480 {
1481         struct mxser_port *port;
1482         int result, status;
1483         unsigned int i, j;
1484
1485         switch (cmd) {
1486         case MOXA_GET_CONF:
1487 /*              if (copy_to_user(argp, mxsercfg,
1488                                 sizeof(struct mxser_hwconf) * 4))
1489                         return -EFAULT;
1490                 return 0;*/
1491                 return -ENXIO;
1492         case MOXA_GET_MAJOR:
1493                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1494                         return -EFAULT;
1495                 return 0;
1496
1497         case MOXA_GET_CUMAJOR:
1498                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1499                         return -EFAULT;
1500                 return 0;
1501
1502         case MOXA_CHKPORTENABLE:
1503                 result = 0;
1504
1505                 for (i = 0; i < MXSER_BOARDS; i++)
1506                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1507                                 if (mxser_boards[i].ports[j].ioaddr)
1508                                         result |= (1 << i);
1509
1510                 return put_user(result, (unsigned long __user *)argp);
1511         case MOXA_GETDATACOUNT:
1512                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1513                         return -EFAULT;
1514                 return 0;
1515         case MOXA_GETMSTATUS:
1516                 for (i = 0; i < MXSER_BOARDS; i++)
1517                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1518                                 port = &mxser_boards[i].ports[j];
1519
1520                                 GMStatus[i].ri = 0;
1521                                 if (!port->ioaddr) {
1522                                         GMStatus[i].dcd = 0;
1523                                         GMStatus[i].dsr = 0;
1524                                         GMStatus[i].cts = 0;
1525                                         continue;
1526                                 }
1527
1528                                 if (!port->tty || !port->tty->termios)
1529                                         GMStatus[i].cflag =
1530                                                 port->normal_termios.c_cflag;
1531                                 else
1532                                         GMStatus[i].cflag =
1533                                                 port->tty->termios->c_cflag;
1534
1535                                 status = inb(port->ioaddr + UART_MSR);
1536                                 if (status & 0x80 /*UART_MSR_DCD */ )
1537                                         GMStatus[i].dcd = 1;
1538                                 else
1539                                         GMStatus[i].dcd = 0;
1540
1541                                 if (status & 0x20 /*UART_MSR_DSR */ )
1542                                         GMStatus[i].dsr = 1;
1543                                 else
1544                                         GMStatus[i].dsr = 0;
1545
1546
1547                                 if (status & 0x10 /*UART_MSR_CTS */ )
1548                                         GMStatus[i].cts = 1;
1549                                 else
1550                                         GMStatus[i].cts = 0;
1551                         }
1552                 if (copy_to_user(argp, GMStatus,
1553                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1554                         return -EFAULT;
1555                 return 0;
1556         case MOXA_ASPP_MON_EXT: {
1557                 int status, p, shiftbit;
1558                 unsigned long opmode;
1559                 unsigned cflag, iflag;
1560
1561                 for (i = 0; i < MXSER_BOARDS; i++)
1562                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1563                                 port = &mxser_boards[i].ports[j];
1564                                 if (!port->ioaddr)
1565                                         continue;
1566
1567                                 status = mxser_get_msr(port->ioaddr, 0, i);
1568
1569                                 if (status & UART_MSR_TERI)
1570                                         port->icount.rng++;
1571                                 if (status & UART_MSR_DDSR)
1572                                         port->icount.dsr++;
1573                                 if (status & UART_MSR_DDCD)
1574                                         port->icount.dcd++;
1575                                 if (status & UART_MSR_DCTS)
1576                                         port->icount.cts++;
1577
1578                                 port->mon_data.modem_status = status;
1579                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1580                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1581                                 mon_data_ext.up_rxcnt[i] =
1582                                         port->mon_data.up_rxcnt;
1583                                 mon_data_ext.up_txcnt[i] =
1584                                         port->mon_data.up_txcnt;
1585                                 mon_data_ext.modem_status[i] =
1586                                         port->mon_data.modem_status;
1587                                 mon_data_ext.baudrate[i] = port->realbaud;
1588
1589                                 if (!port->tty || !port->tty->termios) {
1590                                         cflag = port->normal_termios.c_cflag;
1591                                         iflag = port->normal_termios.c_iflag;
1592                                 } else {
1593                                         cflag = port->tty->termios->c_cflag;
1594                                         iflag = port->tty->termios->c_iflag;
1595                                 }
1596
1597                                 mon_data_ext.databits[i] = cflag & CSIZE;
1598
1599                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1600
1601                                 mon_data_ext.parity[i] =
1602                                         cflag & (PARENB | PARODD | CMSPAR);
1603
1604                                 mon_data_ext.flowctrl[i] = 0x00;
1605
1606                                 if (cflag & CRTSCTS)
1607                                         mon_data_ext.flowctrl[i] |= 0x03;
1608
1609                                 if (iflag & (IXON | IXOFF))
1610                                         mon_data_ext.flowctrl[i] |= 0x0C;
1611
1612                                 if (port->type == PORT_16550A)
1613                                         mon_data_ext.fifo[i] = 1;
1614                                 else
1615                                         mon_data_ext.fifo[i] = 0;
1616
1617                                 p = i % 4;
1618                                 shiftbit = p * 2;
1619                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1620                                 opmode &= OP_MODE_MASK;
1621
1622                                 mon_data_ext.iftype[i] = opmode;
1623
1624                         }
1625                         if (copy_to_user(argp, &mon_data_ext,
1626                                                 sizeof(mon_data_ext)))
1627                                 return -EFAULT;
1628
1629                         return 0;
1630
1631         } default:
1632                 return -ENOIOCTLCMD;
1633         }
1634         return 0;
1635 }
1636
1637 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1638                 unsigned int cmd, unsigned long arg)
1639 {
1640         struct mxser_port *info = tty->driver_data;
1641         struct async_icount cprev, cnow;        /* kernel counter temps */
1642         struct serial_icounter_struct __user *p_cuser;
1643         unsigned long templ;
1644         unsigned long flags;
1645         void __user *argp = (void __user *)arg;
1646         int retval;
1647
1648         if (tty->index == MXSER_PORTS)
1649                 return mxser_ioctl_special(cmd, argp);
1650
1651         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1652                 int p;
1653                 unsigned long opmode;
1654                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1655                 int shiftbit;
1656                 unsigned char val, mask;
1657
1658                 p = tty->index % 4;
1659                 if (cmd == MOXA_SET_OP_MODE) {
1660                         if (get_user(opmode, (int __user *) argp))
1661                                 return -EFAULT;
1662                         if (opmode != RS232_MODE &&
1663                                         opmode != RS485_2WIRE_MODE &&
1664                                         opmode != RS422_MODE &&
1665                                         opmode != RS485_4WIRE_MODE)
1666                                 return -EFAULT;
1667                         mask = ModeMask[p];
1668                         shiftbit = p * 2;
1669                         val = inb(info->opmode_ioaddr);
1670                         val &= mask;
1671                         val |= (opmode << shiftbit);
1672                         outb(val, info->opmode_ioaddr);
1673                 } else {
1674                         shiftbit = p * 2;
1675                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1676                         opmode &= OP_MODE_MASK;
1677                         if (copy_to_user(argp, &opmode, sizeof(int)))
1678                                 return -EFAULT;
1679                 }
1680                 return 0;
1681         }
1682
1683         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1684                         test_bit(TTY_IO_ERROR, &tty->flags))
1685                 return -EIO;
1686
1687         switch (cmd) {
1688         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1689                 retval = tty_check_change(tty);
1690                 if (retval)
1691                         return retval;
1692                 tty_wait_until_sent(tty, 0);
1693                 if (!arg)
1694                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1695                 return 0;
1696         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1697                 retval = tty_check_change(tty);
1698                 if (retval)
1699                         return retval;
1700                 tty_wait_until_sent(tty, 0);
1701                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1702                 return 0;
1703         case TIOCGSOFTCAR:
1704                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1705         case TIOCSSOFTCAR:
1706                 if (get_user(templ, (unsigned long __user *) argp))
1707                         return -EFAULT;
1708                 arg = templ;
1709                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1710                 return 0;
1711         case TIOCGSERIAL:
1712                 return mxser_get_serial_info(info, argp);
1713         case TIOCSSERIAL:
1714                 return mxser_set_serial_info(info, argp);
1715         case TIOCSERGETLSR:     /* Get line status register */
1716                 return mxser_get_lsr_info(info, argp);
1717                 /*
1718                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1719                  * - mask passed in arg for lines of interest
1720                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1721                  * Caller should use TIOCGICOUNT to see which one it was
1722                  */
1723         case TIOCMIWAIT: {
1724                 DECLARE_WAITQUEUE(wait, current);
1725                 int ret;
1726                 spin_lock_irqsave(&info->slock, flags);
1727                 cprev = info->icount;   /* note the counters on entry */
1728                 spin_unlock_irqrestore(&info->slock, flags);
1729
1730                 add_wait_queue(&info->delta_msr_wait, &wait);
1731                 while (1) {
1732                         spin_lock_irqsave(&info->slock, flags);
1733                         cnow = info->icount;    /* atomic copy */
1734                         spin_unlock_irqrestore(&info->slock, flags);
1735
1736                         set_current_state(TASK_INTERRUPTIBLE);
1737                         if (((arg & TIOCM_RNG) &&
1738                                         (cnow.rng != cprev.rng)) ||
1739                                         ((arg & TIOCM_DSR) &&
1740                                         (cnow.dsr != cprev.dsr)) ||
1741                                         ((arg & TIOCM_CD) &&
1742                                         (cnow.dcd != cprev.dcd)) ||
1743                                         ((arg & TIOCM_CTS) &&
1744                                         (cnow.cts != cprev.cts))) {
1745                                 ret = 0;
1746                                 break;
1747                         }
1748                         /* see if a signal did it */
1749                         if (signal_pending(current)) {
1750                                 ret = -ERESTARTSYS;
1751                                 break;
1752                         }
1753                         cprev = cnow;
1754                 }
1755                 current->state = TASK_RUNNING;
1756                 remove_wait_queue(&info->delta_msr_wait, &wait);
1757                 break;
1758         }
1759         /* NOTREACHED */
1760         /*
1761          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1762          * Return: write counters to the user passed counter struct
1763          * NB: both 1->0 and 0->1 transitions are counted except for
1764          *     RI where only 0->1 is counted.
1765          */
1766         case TIOCGICOUNT:
1767                 spin_lock_irqsave(&info->slock, flags);
1768                 cnow = info->icount;
1769                 spin_unlock_irqrestore(&info->slock, flags);
1770                 p_cuser = argp;
1771                 if (put_user(cnow.frame, &p_cuser->frame))
1772                         return -EFAULT;
1773                 if (put_user(cnow.brk, &p_cuser->brk))
1774                         return -EFAULT;
1775                 if (put_user(cnow.overrun, &p_cuser->overrun))
1776                         return -EFAULT;
1777                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1778                         return -EFAULT;
1779                 if (put_user(cnow.parity, &p_cuser->parity))
1780                         return -EFAULT;
1781                 if (put_user(cnow.rx, &p_cuser->rx))
1782                         return -EFAULT;
1783                 if (put_user(cnow.tx, &p_cuser->tx))
1784                         return -EFAULT;
1785                 put_user(cnow.cts, &p_cuser->cts);
1786                 put_user(cnow.dsr, &p_cuser->dsr);
1787                 put_user(cnow.rng, &p_cuser->rng);
1788                 put_user(cnow.dcd, &p_cuser->dcd);
1789                 return 0;
1790         case MOXA_HighSpeedOn:
1791                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1792         case MOXA_SDS_RSTICOUNTER:
1793                 info->mon_data.rxcnt = 0;
1794                 info->mon_data.txcnt = 0;
1795                 return 0;
1796         case MOXA_ASPP_SETBAUD:{
1797                 long baud;
1798                 if (get_user(baud, (long __user *)argp))
1799                         return -EFAULT;
1800                 mxser_set_baud(info, baud);
1801                 return 0;
1802         }
1803         case MOXA_ASPP_GETBAUD:
1804                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1805                         return -EFAULT;
1806
1807                 return 0;
1808
1809         case MOXA_ASPP_OQUEUE:{
1810                 int len, lsr;
1811
1812                 len = mxser_chars_in_buffer(tty);
1813
1814                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1815
1816                 len += (lsr ? 0 : 1);
1817
1818                 if (copy_to_user(argp, &len, sizeof(int)))
1819                         return -EFAULT;
1820
1821                 return 0;
1822         }
1823         case MOXA_ASPP_MON: {
1824                 int mcr, status;
1825
1826                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1827                 mxser_check_modem_status(info, status);
1828
1829                 mcr = inb(info->ioaddr + UART_MCR);
1830                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1831                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1832                 else
1833                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1834
1835                 if (mcr & MOXA_MUST_MCR_TX_XON)
1836                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1837                 else
1838                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1839
1840                 if (info->tty->hw_stopped)
1841                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1842                 else
1843                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1844
1845                 if (copy_to_user(argp, &info->mon_data,
1846                                 sizeof(struct mxser_mon)))
1847                         return -EFAULT;
1848
1849                 return 0;
1850         }
1851         case MOXA_ASPP_LSTATUS: {
1852                 if (copy_to_user(argp, &info->err_shadow,
1853                                 sizeof(unsigned char)))
1854                         return -EFAULT;
1855
1856                 info->err_shadow = 0;
1857                 return 0;
1858         }
1859         case MOXA_SET_BAUD_METHOD: {
1860                 int method;
1861
1862                 if (get_user(method, (int __user *)argp))
1863                         return -EFAULT;
1864                 mxser_set_baud_method[tty->index] = method;
1865                 if (copy_to_user(argp, &method, sizeof(int)))
1866                         return -EFAULT;
1867
1868                 return 0;
1869         }
1870         default:
1871                 return -ENOIOCTLCMD;
1872         }
1873         return 0;
1874 }
1875
1876 static void mxser_stoprx(struct tty_struct *tty)
1877 {
1878         struct mxser_port *info = tty->driver_data;
1879
1880         info->ldisc_stop_rx = 1;
1881         if (I_IXOFF(tty)) {
1882                 if (info->board->chip_flag) {
1883                         info->IER &= ~MOXA_MUST_RECV_ISR;
1884                         outb(info->IER, info->ioaddr + UART_IER);
1885                 } else {
1886                         info->x_char = STOP_CHAR(tty);
1887                         outb(0, info->ioaddr + UART_IER);
1888                         info->IER |= UART_IER_THRI;
1889                         outb(info->IER, info->ioaddr + UART_IER);
1890                 }
1891         }
1892
1893         if (info->tty->termios->c_cflag & CRTSCTS) {
1894                 info->MCR &= ~UART_MCR_RTS;
1895                 outb(info->MCR, info->ioaddr + UART_MCR);
1896         }
1897 }
1898
1899 /*
1900  * This routine is called by the upper-layer tty layer to signal that
1901  * incoming characters should be throttled.
1902  */
1903 static void mxser_throttle(struct tty_struct *tty)
1904 {
1905         mxser_stoprx(tty);
1906 }
1907
1908 static void mxser_unthrottle(struct tty_struct *tty)
1909 {
1910         struct mxser_port *info = tty->driver_data;
1911
1912         /* startrx */
1913         info->ldisc_stop_rx = 0;
1914         if (I_IXOFF(tty)) {
1915                 if (info->x_char)
1916                         info->x_char = 0;
1917                 else {
1918                         if (info->board->chip_flag) {
1919                                 info->IER |= MOXA_MUST_RECV_ISR;
1920                                 outb(info->IER, info->ioaddr + UART_IER);
1921                         } else {
1922                                 info->x_char = START_CHAR(tty);
1923                                 outb(0, info->ioaddr + UART_IER);
1924                                 info->IER |= UART_IER_THRI;
1925                                 outb(info->IER, info->ioaddr + UART_IER);
1926                         }
1927                 }
1928         }
1929
1930         if (info->tty->termios->c_cflag & CRTSCTS) {
1931                 info->MCR |= UART_MCR_RTS;
1932                 outb(info->MCR, info->ioaddr + UART_MCR);
1933         }
1934 }
1935
1936 /*
1937  * mxser_stop() and mxser_start()
1938  *
1939  * This routines are called before setting or resetting tty->stopped.
1940  * They enable or disable transmitter interrupts, as necessary.
1941  */
1942 static void mxser_stop(struct tty_struct *tty)
1943 {
1944         struct mxser_port *info = tty->driver_data;
1945         unsigned long flags;
1946
1947         spin_lock_irqsave(&info->slock, flags);
1948         if (info->IER & UART_IER_THRI) {
1949                 info->IER &= ~UART_IER_THRI;
1950                 outb(info->IER, info->ioaddr + UART_IER);
1951         }
1952         spin_unlock_irqrestore(&info->slock, flags);
1953 }
1954
1955 static void mxser_start(struct tty_struct *tty)
1956 {
1957         struct mxser_port *info = tty->driver_data;
1958         unsigned long flags;
1959
1960         spin_lock_irqsave(&info->slock, flags);
1961         if (info->xmit_cnt && info->xmit_buf) {
1962                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1963                 info->IER |= UART_IER_THRI;
1964                 outb(info->IER, info->ioaddr + UART_IER);
1965         }
1966         spin_unlock_irqrestore(&info->slock, flags);
1967 }
1968
1969 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1970 {
1971         struct mxser_port *info = tty->driver_data;
1972         unsigned long flags;
1973
1974         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1975                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1976
1977                 mxser_change_speed(info, old_termios);
1978
1979                 if ((old_termios->c_cflag & CRTSCTS) &&
1980                                 !(tty->termios->c_cflag & CRTSCTS)) {
1981                         tty->hw_stopped = 0;
1982                         mxser_start(tty);
1983                 }
1984         }
1985
1986         /* Handle sw stopped */
1987         if ((old_termios->c_iflag & IXON) &&
1988                         !(tty->termios->c_iflag & IXON)) {
1989                 tty->stopped = 0;
1990
1991                 if (info->board->chip_flag) {
1992                         spin_lock_irqsave(&info->slock, flags);
1993                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1994                         spin_unlock_irqrestore(&info->slock, flags);
1995                 }
1996
1997                 mxser_start(tty);
1998         }
1999 }
2000
2001 /*
2002  * mxser_wait_until_sent() --- wait until the transmitter is empty
2003  */
2004 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2005 {
2006         struct mxser_port *info = tty->driver_data;
2007         unsigned long orig_jiffies, char_time;
2008         int lsr;
2009
2010         if (info->type == PORT_UNKNOWN)
2011                 return;
2012
2013         if (info->xmit_fifo_size == 0)
2014                 return;         /* Just in case.... */
2015
2016         orig_jiffies = jiffies;
2017         /*
2018          * Set the check interval to be 1/5 of the estimated time to
2019          * send a single character, and make it at least 1.  The check
2020          * interval should also be less than the timeout.
2021          *
2022          * Note: we have to use pretty tight timings here to satisfy
2023          * the NIST-PCTS.
2024          */
2025         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2026         char_time = char_time / 5;
2027         if (char_time == 0)
2028                 char_time = 1;
2029         if (timeout && timeout < char_time)
2030                 char_time = timeout;
2031         /*
2032          * If the transmitter hasn't cleared in twice the approximate
2033          * amount of time to send the entire FIFO, it probably won't
2034          * ever clear.  This assumes the UART isn't doing flow
2035          * control, which is currently the case.  Hence, if it ever
2036          * takes longer than info->timeout, this is probably due to a
2037          * UART bug of some kind.  So, we clamp the timeout parameter at
2038          * 2*info->timeout.
2039          */
2040         if (!timeout || timeout > 2 * info->timeout)
2041                 timeout = 2 * info->timeout;
2042 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2043         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2044                 timeout, char_time);
2045         printk("jiff=%lu...", jiffies);
2046 #endif
2047         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2048 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2049                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2050 #endif
2051                 schedule_timeout_interruptible(char_time);
2052                 if (signal_pending(current))
2053                         break;
2054                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2055                         break;
2056         }
2057         set_current_state(TASK_RUNNING);
2058
2059 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2060         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2061 #endif
2062 }
2063
2064 /*
2065  * This routine is called by tty_hangup() when a hangup is signaled.
2066  */
2067 void mxser_hangup(struct tty_struct *tty)
2068 {
2069         struct mxser_port *info = tty->driver_data;
2070
2071         mxser_flush_buffer(tty);
2072         mxser_shutdown(info);
2073         info->event = 0;
2074         info->count = 0;
2075         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2076         info->tty = NULL;
2077         wake_up_interruptible(&info->open_wait);
2078 }
2079
2080 /*
2081  * mxser_rs_break() --- routine which turns the break handling on or off
2082  */
2083 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2084 {
2085         struct mxser_port *info = tty->driver_data;
2086         unsigned long flags;
2087
2088         spin_lock_irqsave(&info->slock, flags);
2089         if (break_state == -1)
2090                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2091                         info->ioaddr + UART_LCR);
2092         else
2093                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2094                         info->ioaddr + UART_LCR);
2095         spin_unlock_irqrestore(&info->slock, flags);
2096 }
2097
2098 static void mxser_receive_chars(struct mxser_port *port, int *status)
2099 {
2100         struct tty_struct *tty = port->tty;
2101         unsigned char ch, gdl;
2102         int ignored = 0;
2103         int cnt = 0;
2104         int recv_room;
2105         int max = 256;
2106         unsigned long flags;
2107
2108         spin_lock_irqsave(&port->slock, flags);
2109
2110         recv_room = tty->receive_room;
2111         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2112                 mxser_stoprx(tty);
2113
2114         if (port->board->chip_flag != MOXA_OTHER_UART) {
2115
2116                 if (*status & UART_LSR_SPECIAL)
2117                         goto intr_old;
2118                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2119                                 (*status & MOXA_MUST_LSR_RERR))
2120                         goto intr_old;
2121                 if (*status & MOXA_MUST_LSR_RERR)
2122                         goto intr_old;
2123
2124                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2125
2126                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2127                         gdl &= MOXA_MUST_GDL_MASK;
2128                 if (gdl >= recv_room) {
2129                         if (!port->ldisc_stop_rx)
2130                                 mxser_stoprx(tty);
2131                 }
2132                 while (gdl--) {
2133                         ch = inb(port->ioaddr + UART_RX);
2134                         tty_insert_flip_char(tty, ch, 0);
2135                         cnt++;
2136                 }
2137                 goto end_intr;
2138         }
2139 intr_old:
2140
2141         do {
2142                 if (max-- < 0)
2143                         break;
2144
2145                 ch = inb(port->ioaddr + UART_RX);
2146                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2147                         outb(0x23, port->ioaddr + UART_FCR);
2148                 *status &= port->read_status_mask;
2149                 if (*status & port->ignore_status_mask) {
2150                         if (++ignored > 100)
2151                                 break;
2152                 } else {
2153                         char flag = 0;
2154                         if (*status & UART_LSR_SPECIAL) {
2155                                 if (*status & UART_LSR_BI) {
2156                                         flag = TTY_BREAK;
2157                                         port->icount.brk++;
2158
2159                                         if (port->flags & ASYNC_SAK)
2160                                                 do_SAK(tty);
2161                                 } else if (*status & UART_LSR_PE) {
2162                                         flag = TTY_PARITY;
2163                                         port->icount.parity++;
2164                                 } else if (*status & UART_LSR_FE) {
2165                                         flag = TTY_FRAME;
2166                                         port->icount.frame++;
2167                                 } else if (*status & UART_LSR_OE) {
2168                                         flag = TTY_OVERRUN;
2169                                         port->icount.overrun++;
2170                                 }
2171                         }
2172                         tty_insert_flip_char(tty, ch, flag);
2173                         cnt++;
2174                         if (cnt >= recv_room) {
2175                                 if (!port->ldisc_stop_rx)
2176                                         mxser_stoprx(tty);
2177                                 break;
2178                         }
2179
2180                 }
2181
2182                 if (port->board->chip_flag)
2183                         break;
2184
2185                 *status = inb(port->ioaddr + UART_LSR);
2186         } while (*status & UART_LSR_DR);
2187
2188 end_intr:
2189         mxvar_log.rxcnt[port->tty->index] += cnt;
2190         port->mon_data.rxcnt += cnt;
2191         port->mon_data.up_rxcnt += cnt;
2192         spin_unlock_irqrestore(&port->slock, flags);
2193
2194         tty_flip_buffer_push(tty);
2195 }
2196
2197 static void mxser_transmit_chars(struct mxser_port *port)
2198 {
2199         int count, cnt;
2200         unsigned long flags;
2201
2202         spin_lock_irqsave(&port->slock, flags);
2203
2204         if (port->x_char) {
2205                 outb(port->x_char, port->ioaddr + UART_TX);
2206                 port->x_char = 0;
2207                 mxvar_log.txcnt[port->tty->index]++;
2208                 port->mon_data.txcnt++;
2209                 port->mon_data.up_txcnt++;
2210                 port->icount.tx++;
2211                 goto unlock;
2212         }
2213
2214         if (port->xmit_buf == 0)
2215                 goto unlock;
2216
2217         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2218                         (port->tty->hw_stopped &&
2219                         (port->type != PORT_16550A) &&
2220                         (!port->board->chip_flag))) {
2221                 port->IER &= ~UART_IER_THRI;
2222                 outb(port->IER, port->ioaddr + UART_IER);
2223                 goto unlock;
2224         }
2225
2226         cnt = port->xmit_cnt;
2227         count = port->xmit_fifo_size;
2228         do {
2229                 outb(port->xmit_buf[port->xmit_tail++],
2230                         port->ioaddr + UART_TX);
2231                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2232                 if (--port->xmit_cnt <= 0)
2233                         break;
2234         } while (--count > 0);
2235         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2236
2237         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2238         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2239         port->icount.tx += (cnt - port->xmit_cnt);
2240
2241         if (port->xmit_cnt < WAKEUP_CHARS) {
2242                 set_bit(MXSER_EVENT_TXLOW, &port->event);
2243                 schedule_work(&port->tqueue);
2244         }
2245         if (port->xmit_cnt <= 0) {
2246                 port->IER &= ~UART_IER_THRI;
2247                 outb(port->IER, port->ioaddr + UART_IER);
2248         }
2249 unlock:
2250         spin_unlock_irqrestore(&port->slock, flags);
2251 }
2252
2253 /*
2254  * This is the serial driver's generic interrupt routine
2255  */
2256 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2257 {
2258         int status, iir, i;
2259         struct mxser_board *brd = NULL;
2260         struct mxser_port *port;
2261         int max, irqbits, bits, msr;
2262         int pass_counter = 0;
2263         unsigned int int_cnt;
2264         int handled = IRQ_NONE;
2265
2266         for (i = 0; i < MXSER_BOARDS; i++)
2267                 if (dev_id == &mxser_boards[i]) {
2268                         brd = dev_id;
2269                         break;
2270                 }
2271
2272         if (i == MXSER_BOARDS)
2273                 goto irq_stop;
2274         if (brd == NULL)
2275                 goto irq_stop;
2276         max = brd->info->nports;
2277         while (1) {
2278                 irqbits = inb(brd->vector) & brd->vector_mask;
2279                 if (irqbits == brd->vector_mask)
2280                         break;
2281
2282                 handled = IRQ_HANDLED;
2283                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2284                         if (irqbits == brd->vector_mask)
2285                                 break;
2286                         if (bits & irqbits)
2287                                 continue;
2288                         port = &brd->ports[i];
2289
2290                         int_cnt = 0;
2291                         do {
2292                                 iir = inb(port->ioaddr + UART_IIR);
2293                                 if (iir & UART_IIR_NO_INT)
2294                                         break;
2295                                 iir &= MOXA_MUST_IIR_MASK;
2296                                 if (!port->tty) {
2297                                         status = inb(port->ioaddr + UART_LSR);
2298                                         outb(0x27, port->ioaddr + UART_FCR);
2299                                         inb(port->ioaddr + UART_MSR);
2300                                         break;
2301                                 }
2302
2303                                 status = inb(port->ioaddr + UART_LSR);
2304
2305                                 if (status & UART_LSR_PE)
2306                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2307                                 if (status & UART_LSR_FE)
2308                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2309                                 if (status & UART_LSR_OE)
2310                                         port->err_shadow |=
2311                                                 NPPI_NOTIFY_HW_OVERRUN;
2312                                 if (status & UART_LSR_BI)
2313                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2314
2315                                 if (port->board->chip_flag) {
2316                                         if (iir == MOXA_MUST_IIR_GDA ||
2317                                             iir == MOXA_MUST_IIR_RDA ||
2318                                             iir == MOXA_MUST_IIR_RTO ||
2319                                             iir == MOXA_MUST_IIR_LSR)
2320                                                 mxser_receive_chars(port,
2321                                                                 &status);
2322
2323                                 } else {
2324                                         status &= port->read_status_mask;
2325                                         if (status & UART_LSR_DR)
2326                                                 mxser_receive_chars(port,
2327                                                                 &status);
2328                                 }
2329                                 msr = inb(port->ioaddr + UART_MSR);
2330                                 if (msr & UART_MSR_ANY_DELTA)
2331                                         mxser_check_modem_status(port, msr);
2332
2333                                 if (port->board->chip_flag) {
2334                                         if (iir == 0x02 && (status &
2335                                                                 UART_LSR_THRE))
2336                                                 mxser_transmit_chars(port);
2337                                 } else {
2338                                         if (status & UART_LSR_THRE)
2339                                                 mxser_transmit_chars(port);
2340                                 }
2341                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2342                 }
2343                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
2344                         break;  /* Prevent infinite loops */
2345         }
2346
2347 irq_stop:
2348         return handled;
2349 }
2350
2351 static const struct tty_operations mxser_ops = {
2352         .open = mxser_open,
2353         .close = mxser_close,
2354         .write = mxser_write,
2355         .put_char = mxser_put_char,
2356         .flush_chars = mxser_flush_chars,
2357         .write_room = mxser_write_room,
2358         .chars_in_buffer = mxser_chars_in_buffer,
2359         .flush_buffer = mxser_flush_buffer,
2360         .ioctl = mxser_ioctl,
2361         .throttle = mxser_throttle,
2362         .unthrottle = mxser_unthrottle,
2363         .set_termios = mxser_set_termios,
2364         .stop = mxser_stop,
2365         .start = mxser_start,
2366         .hangup = mxser_hangup,
2367         .break_ctl = mxser_rs_break,
2368         .wait_until_sent = mxser_wait_until_sent,
2369         .tiocmget = mxser_tiocmget,
2370         .tiocmset = mxser_tiocmset,
2371 };
2372
2373 /*
2374  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2375  */
2376
2377 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2378                 unsigned int irq)
2379 {
2380         if (irq)
2381                 free_irq(brd->irq, brd);
2382         if (pdev != NULL) {     /* PCI */
2383                 pci_release_region(pdev, 2);
2384                 pci_release_region(pdev, 3);
2385                 pci_dev_put(pdev);
2386         } else {
2387                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2388                 release_region(brd->vector, 1);
2389         }
2390 }
2391
2392 static int __devinit mxser_initbrd(struct mxser_board *brd,
2393                 struct pci_dev *pdev)
2394 {
2395         struct mxser_port *info;
2396         unsigned int i;
2397         int retval;
2398
2399         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2400
2401         for (i = 0; i < brd->info->nports; i++) {
2402                 info = &brd->ports[i];
2403                 info->board = brd;
2404                 info->stop_rx = 0;
2405                 info->ldisc_stop_rx = 0;
2406
2407                 /* Enhance mode enabled here */
2408                 if (brd->chip_flag != MOXA_OTHER_UART)
2409                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2410
2411                 info->flags = ASYNC_SHARE_IRQ;
2412                 info->type = brd->uart_type;
2413
2414                 process_txrx_fifo(info);
2415
2416                 info->custom_divisor = info->baud_base * 16;
2417                 info->close_delay = 5 * HZ / 10;
2418                 info->closing_wait = 30 * HZ;
2419                 INIT_WORK(&info->tqueue, mxser_do_softint);
2420                 info->normal_termios = mxvar_sdriver->init_termios;
2421                 init_waitqueue_head(&info->open_wait);
2422                 init_waitqueue_head(&info->close_wait);
2423                 init_waitqueue_head(&info->delta_msr_wait);
2424                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2425                 info->err_shadow = 0;
2426                 spin_lock_init(&info->slock);
2427
2428                 /* before set INT ISR, disable all int */
2429                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2430                         info->ioaddr + UART_IER);
2431         }
2432         /*
2433          * Allocate the IRQ if necessary
2434          */
2435
2436         retval = request_irq(brd->irq, mxser_interrupt,
2437                         (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
2438                         IRQF_DISABLED, "mxser", brd);
2439         if (retval) {
2440                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2441                         "conflict with another device.\n",
2442                         brd->info->name, brd->irq);
2443                 /* We hold resources, we need to release them. */
2444                 mxser_release_res(brd, pdev, 0);
2445                 return retval;
2446         }
2447         return 0;
2448 }
2449
2450 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2451 {
2452         int id, i, bits;
2453         unsigned short regs[16], irq;
2454         unsigned char scratch, scratch2;
2455
2456         brd->chip_flag = MOXA_OTHER_UART;
2457
2458         id = mxser_read_register(cap, regs);
2459         switch (id) {
2460         case C168_ASIC_ID:
2461                 brd->info = &mxser_cards[0];
2462                 break;
2463         case C104_ASIC_ID:
2464                 brd->info = &mxser_cards[1];
2465                 break;
2466         case CI104J_ASIC_ID:
2467                 brd->info = &mxser_cards[2];
2468                 break;
2469         case C102_ASIC_ID:
2470                 brd->info = &mxser_cards[5];
2471                 break;
2472         case CI132_ASIC_ID:
2473                 brd->info = &mxser_cards[6];
2474                 break;
2475         case CI134_ASIC_ID:
2476                 brd->info = &mxser_cards[7];
2477                 break;
2478         default:
2479                 return 0;
2480         }
2481
2482         irq = 0;
2483         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2484            Flag-hack checks if configuration should be read as 2-port here. */
2485         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2486                 irq = regs[9] & 0xF000;
2487                 irq = irq | (irq >> 4);
2488                 if (irq != (regs[9] & 0xFF00))
2489                         return MXSER_ERR_IRQ_CONFLIT;
2490         } else if (brd->info->nports == 4) {
2491                 irq = regs[9] & 0xF000;
2492                 irq = irq | (irq >> 4);
2493                 irq = irq | (irq >> 8);
2494                 if (irq != regs[9])
2495                         return MXSER_ERR_IRQ_CONFLIT;
2496         } else if (brd->info->nports == 8) {
2497                 irq = regs[9] & 0xF000;
2498                 irq = irq | (irq >> 4);
2499                 irq = irq | (irq >> 8);
2500                 if ((irq != regs[9]) || (irq != regs[10]))
2501                         return MXSER_ERR_IRQ_CONFLIT;
2502         }
2503
2504         if (!irq)
2505                 return MXSER_ERR_IRQ;
2506         brd->irq = ((int)(irq & 0xF000) >> 12);
2507         for (i = 0; i < 8; i++)
2508                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2509         if ((regs[12] & 0x80) == 0)
2510                 return MXSER_ERR_VECTOR;
2511         brd->vector = (int)regs[11];    /* interrupt vector */
2512         if (id == 1)
2513                 brd->vector_mask = 0x00FF;
2514         else
2515                 brd->vector_mask = 0x000F;
2516         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2517                 if (regs[12] & bits) {
2518                         brd->ports[i].baud_base = 921600;
2519                         brd->ports[i].max_baud = 921600;
2520                 } else {
2521                         brd->ports[i].baud_base = 115200;
2522                         brd->ports[i].max_baud = 115200;
2523                 }
2524         }
2525         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2526         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2527         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2528         outb(scratch2, cap + UART_LCR);
2529         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2530         scratch = inb(cap + UART_IIR);
2531
2532         if (scratch & 0xC0)
2533                 brd->uart_type = PORT_16550A;
2534         else
2535                 brd->uart_type = PORT_16450;
2536         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2537                         "mxser(IO)"))
2538                 return MXSER_ERR_IOADDR;
2539         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2540                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2541                 return MXSER_ERR_VECTOR;
2542         }
2543         return brd->info->nports;
2544 }
2545
2546 static int __devinit mxser_probe(struct pci_dev *pdev,
2547                 const struct pci_device_id *ent)
2548 {
2549         struct mxser_board *brd;
2550         unsigned int i, j;
2551         unsigned long ioaddress;
2552         int retval = -EINVAL;
2553
2554         for (i = 0; i < MXSER_BOARDS; i++)
2555                 if (mxser_boards[i].info == NULL)
2556                         break;
2557
2558         if (i >= MXSER_BOARDS) {
2559                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2560                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2561                 goto err;
2562         }
2563
2564         brd = &mxser_boards[i];
2565         brd->idx = i * MXSER_PORTS_PER_BOARD;
2566         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2567                 mxser_cards[ent->driver_data].name,
2568                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2569
2570         retval = pci_enable_device(pdev);
2571         if (retval) {
2572                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2573                 goto err;
2574         }
2575
2576         /* io address */
2577         ioaddress = pci_resource_start(pdev, 2);
2578         retval = pci_request_region(pdev, 2, "mxser(IO)");
2579         if (retval)
2580                 goto err;
2581
2582         brd->info = &mxser_cards[ent->driver_data];
2583         for (i = 0; i < brd->info->nports; i++)
2584                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2585
2586         /* vector */
2587         ioaddress = pci_resource_start(pdev, 3);
2588         retval = pci_request_region(pdev, 3, "mxser(vector)");
2589         if (retval)
2590                 goto err_relio;
2591         brd->vector = ioaddress;
2592
2593         /* irq */
2594         brd->irq = pdev->irq;
2595
2596         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2597         brd->uart_type = PORT_16550A;
2598         brd->vector_mask = 0;
2599
2600         for (i = 0; i < brd->info->nports; i++) {
2601                 for (j = 0; j < UART_INFO_NUM; j++) {
2602                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2603                                 brd->ports[i].max_baud =
2604                                         Gpci_uart_info[j].max_baud;
2605
2606                                 /* exception....CP-102 */
2607                                 if (brd->info->flags & MXSER_HIGHBAUD)
2608                                         brd->ports[i].max_baud = 921600;
2609                                 break;
2610                         }
2611                 }
2612         }
2613
2614         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2615                 for (i = 0; i < brd->info->nports; i++) {
2616                         if (i < 4)
2617                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2618                         else
2619                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2620                 }
2621                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2622                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2623         }
2624
2625         for (i = 0; i < brd->info->nports; i++) {
2626                 brd->vector_mask |= (1 << i);
2627                 brd->ports[i].baud_base = 921600;
2628         }
2629
2630         /* mxser_initbrd will hook ISR. */
2631         if (mxser_initbrd(brd, pdev) < 0)
2632                 goto err_relvec;
2633
2634         for (i = 0; i < brd->info->nports; i++)
2635                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2636
2637         pci_set_drvdata(pdev, brd);
2638
2639         return 0;
2640 err_relvec:
2641         pci_release_region(pdev, 3);
2642 err_relio:
2643         pci_release_region(pdev, 2);
2644         brd->info = NULL;
2645 err:
2646         return retval;
2647 }
2648
2649 static void __devexit mxser_remove(struct pci_dev *pdev)
2650 {
2651         struct mxser_board *brd = pci_get_drvdata(pdev);
2652         unsigned int i;
2653
2654         for (i = 0; i < brd->info->nports; i++)
2655                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2656
2657         mxser_release_res(brd, pdev, 1);
2658 }
2659
2660 static struct pci_driver mxser_driver = {
2661         .name = "mxser",
2662         .id_table = mxser_pcibrds,
2663         .probe = mxser_probe,
2664         .remove = __devexit_p(mxser_remove)
2665 };
2666
2667 static int __init mxser_module_init(void)
2668 {
2669         struct mxser_board *brd;
2670         unsigned long cap;
2671         unsigned int i, m, isaloop;
2672         int retval, b;
2673
2674         pr_debug("Loading module mxser ...\n");
2675
2676         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2677         if (!mxvar_sdriver)
2678                 return -ENOMEM;
2679         spin_lock_init(&gm_lock);
2680
2681         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2682                 MXSER_VERSION);
2683
2684         /* Initialize the tty_driver structure */
2685         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2686         mxvar_sdriver->name = "ttyMI";
2687         mxvar_sdriver->major = ttymajor;
2688         mxvar_sdriver->minor_start = 0;
2689         mxvar_sdriver->num = MXSER_PORTS + 1;
2690         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2691         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2692         mxvar_sdriver->init_termios = tty_std_termios;
2693         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2694         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2695         tty_set_operations(mxvar_sdriver, &mxser_ops);
2696
2697         retval = tty_register_driver(mxvar_sdriver);
2698         if (retval) {
2699                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2700                                 "tty driver !\n");
2701                 goto err_put;
2702         }
2703
2704         mxvar_diagflag = 0;
2705
2706         m = 0;
2707         /* Start finding ISA boards here */
2708         for (isaloop = 0; isaloop < 2; isaloop++)
2709                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2710                         if (!isaloop)
2711                                 cap = mxserBoardCAP[b]; /* predefined */
2712                         else
2713                                 cap = ioaddr[b]; /* module param */
2714
2715                         if (!cap)
2716                                 continue;
2717
2718                         brd = &mxser_boards[m];
2719                         retval = mxser_get_ISA_conf(cap, brd);
2720
2721                         if (retval != 0)
2722                                 printk(KERN_INFO "Found MOXA %s board "
2723                                         "(CAP=0x%x)\n",
2724                                         brd->info->name, ioaddr[b]);
2725
2726                         if (retval <= 0) {
2727                                 if (retval == MXSER_ERR_IRQ)
2728                                         printk(KERN_ERR "Invalid interrupt "
2729                                                 "number, board not "
2730                                                 "configured\n");
2731                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2732                                         printk(KERN_ERR "Invalid interrupt "
2733                                                 "number, board not "
2734                                                 "configured\n");
2735                                 else if (retval == MXSER_ERR_VECTOR)
2736                                         printk(KERN_ERR "Invalid interrupt "
2737                                                 "vector, board not "
2738                                                 "configured\n");
2739                                 else if (retval == MXSER_ERR_IOADDR)
2740                                         printk(KERN_ERR "Invalid I/O address, "
2741                                                 "board not configured\n");
2742
2743                                 brd->info = NULL;
2744                                 continue;
2745                         }
2746
2747                         /* mxser_initbrd will hook ISR. */
2748                         if (mxser_initbrd(brd, NULL) < 0) {
2749                                 brd->info = NULL;
2750                                 continue;
2751                         }
2752
2753                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2754                         for (i = 0; i < brd->info->nports; i++)
2755                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2756                                                 NULL);
2757
2758                         m++;
2759                 }
2760
2761         retval = pci_register_driver(&mxser_driver);
2762         if (retval) {
2763                 printk(KERN_ERR "Can't register pci driver\n");
2764                 if (!m) {
2765                         retval = -ENODEV;
2766                         goto err_unr;
2767                 } /* else: we have some ISA cards under control */
2768         }
2769
2770         pr_debug("Done.\n");
2771
2772         return 0;
2773 err_unr:
2774         tty_unregister_driver(mxvar_sdriver);
2775 err_put:
2776         put_tty_driver(mxvar_sdriver);
2777         return retval;
2778 }
2779
2780 static void __exit mxser_module_exit(void)
2781 {
2782         unsigned int i, j;
2783
2784         pr_debug("Unloading module mxser ...\n");
2785
2786         pci_unregister_driver(&mxser_driver);
2787
2788         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2789                 if (mxser_boards[i].info != NULL)
2790                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2791                                 tty_unregister_device(mxvar_sdriver,
2792                                                 mxser_boards[i].idx + j);
2793         tty_unregister_driver(mxvar_sdriver);
2794         put_tty_driver(mxvar_sdriver);
2795
2796         for (i = 0; i < MXSER_BOARDS; i++)
2797                 if (mxser_boards[i].info != NULL)
2798                         mxser_release_res(&mxser_boards[i], NULL, 1);
2799
2800         pr_debug("Done.\n");
2801 }
2802
2803 module_init(mxser_module_init);
2804 module_exit(mxser_module_exit);