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/delay.h>
  41 #include <linux/pci.h>
  42
  43 #include <asm/system.h>
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/bitops.h>
  47 #include <asm/uaccess.h>
  48
  49 #include "mxser_new.h"
  50
  51 #define MXSER_VERSION   "2.0.1"         /* 1.9.15 */
  52 #define MXSERMAJOR       174
  53 #define MXSERCUMAJOR     175
  54
  55 #define MXSER_BOARDS            4       /* Max. boards */
  56 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  57 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  58 #define MXSER_ISR_PASS_LIMIT    100
  59
  60 #define MXSER_ERR_IOADDR        -1
  61 #define MXSER_ERR_IRQ           -2
  62 #define MXSER_ERR_IRQ_CONFLIT   -3
  63 #define MXSER_ERR_VECTOR        -4
  64
  65 /*CheckIsMoxaMust return value*/
  66 #define MOXA_OTHER_UART         0x00
  67 #define MOXA_MUST_MU150_HWID    0x01
  68 #define MOXA_MUST_MU860_HWID    0x02
  69
  70 #define WAKEUP_CHARS            256
  71
  72 #define UART_MCR_AFE            0x20
  73 #define UART_LSR_SPECIAL        0x1E
  74
  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 mxvar_baud_table[] = {
 180         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
 181         4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
 182 };
 183 static unsigned int mxvar_baud_table1[] = {
 184         0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400,
 185         B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600
 186 };
 187 #define BAUD_TABLE_NO ARRAY_SIZE(mxvar_baud_table)
 188
 189 #define B_SPEC  B2000000
 190
 191 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 192 static int ttymajor = MXSERMAJOR;
 193 static int calloutmajor = MXSERCUMAJOR;
 194
 195 /* Variables for insmod */
 196
 197 MODULE_AUTHOR("Casper Yang");
 198 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 199 module_param_array(ioaddr, int, NULL, 0);
 200 module_param(ttymajor, int, 0);
 201 MODULE_LICENSE("GPL");
 202
 203 struct mxser_log {
 204         int tick;
 205         unsigned long rxcnt[MXSER_PORTS];
 206         unsigned long txcnt[MXSER_PORTS];
 207 };
 208
 209
 210 struct mxser_mon {
 211         unsigned long rxcnt;
 212         unsigned long txcnt;
 213         unsigned long up_rxcnt;
 214         unsigned long up_txcnt;
 215         int modem_status;
 216         unsigned char hold_reason;
 217 };
 218
 219 struct mxser_mon_ext {
 220         unsigned long rx_cnt[32];
 221         unsigned long tx_cnt[32];
 222         unsigned long up_rxcnt[32];
 223         unsigned long up_txcnt[32];
 224         int modem_status[32];
 225
 226         long baudrate[32];
 227         int databits[32];
 228         int stopbits[32];
 229         int parity[32];
 230         int flowctrl[32];
 231         int fifo[32];
 232         int iftype[32];
 233 };
 234
 235 struct mxser_board;
 236
 237 struct mxser_port {
 238         struct mxser_board *board;
 239         struct tty_struct *tty;
 240
 241         unsigned long ioaddr;
 242         unsigned long opmode_ioaddr;
 243         int max_baud;
 244
 245         int rx_high_water;
 246         int rx_trigger;         /* Rx fifo trigger level */
 247         int rx_low_water;
 248         int baud_base;          /* max. speed */
 249         long realbaud;
 250         int type;               /* UART type */
 251         int flags;              /* defined in tty.h */
 252         int speed;
 253
 254         int x_char;             /* xon/xoff character */
 255         int IER;                /* Interrupt Enable Register */
 256         int MCR;                /* Modem control register */
 257
 258         unsigned char stop_rx;
 259         unsigned char ldisc_stop_rx;
 260
 261         int custom_divisor;
 262         int close_delay;
 263         unsigned short closing_wait;
 264         unsigned char err_shadow;
 265         unsigned long event;
 266
 267         int count;              /* # of fd on device */
 268         int blocked_open;       /* # of blocked opens */
 269         struct async_icount icount; /* kernel counters for 4 input interrupts */
 270         int timeout;
 271
 272         int read_status_mask;
 273         int ignore_status_mask;
 274         int xmit_fifo_size;
 275         unsigned char *xmit_buf;
 276         int xmit_head;
 277         int xmit_tail;
 278         int xmit_cnt;
 279
 280         struct ktermios normal_termios;
 281
 282         struct mxser_mon mon_data;
 283
 284         spinlock_t slock;
 285         wait_queue_head_t open_wait;
 286         wait_queue_head_t delta_msr_wait;
 287 };
 288
 289 struct mxser_board {
 290         unsigned int idx;
 291         int irq;
 292         const struct mxser_cardinfo *info;
 293         unsigned long vector;
 294         unsigned long vector_mask;
 295
 296         int chip_flag;
 297         int uart_type;
 298
 299         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 300 };
 301
 302 struct mxser_mstatus {
 303         tcflag_t cflag;
 304         int cts;
 305         int dsr;
 306         int ri;
 307         int dcd;
 308 };
 309
 310 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 311
 312 static int mxserBoardCAP[MXSER_BOARDS] = {
 313         0, 0, 0, 0
 314         /*  0x180, 0x280, 0x200, 0x320 */
 315 };
 316
 317 static struct mxser_board mxser_boards[MXSER_BOARDS];
 318 static struct tty_driver *mxvar_sdriver;
 319 static struct mxser_log mxvar_log;
 320 static int mxvar_diagflag;
 321 static unsigned char mxser_msr[MXSER_PORTS + 1];
 322 static struct mxser_mon_ext mon_data_ext;
 323 static int mxser_set_baud_method[MXSER_PORTS + 1];
 324
 325 #ifdef CONFIG_PCI
 326 static int __devinit CheckIsMoxaMust(int io)
 327 {
 328         u8 oldmcr, hwid;
 329         int i;
 330
 331         outb(0, io + UART_LCR);
 332         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 333         oldmcr = inb(io + UART_MCR);
 334         outb(0, io + UART_MCR);
 335         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 336         if ((hwid = inb(io + UART_MCR)) != 0) {
 337                 outb(oldmcr, io + UART_MCR);
 338                 return MOXA_OTHER_UART;
 339         }
 340
 341         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 342         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 343                 if (hwid == Gpci_uart_info[i].type)
 344                         return (int)hwid;
 345         }
 346         return MOXA_OTHER_UART;
 347 }
 348 #endif
 349
 350 static void process_txrx_fifo(struct mxser_port *info)
 351 {
 352         int i;
 353
 354         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 355                 info->rx_trigger = 1;
 356                 info->rx_high_water = 1;
 357                 info->rx_low_water = 1;
 358                 info->xmit_fifo_size = 1;
 359         } else
 360                 for (i = 0; i < UART_INFO_NUM; i++)
 361                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 362                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 363                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 364                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 365                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 366                                 break;
 367                         }
 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         unsigned int i;
 458         int quot = 0;
 459         unsigned char cval;
 460         int ret = 0;
 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         for (i = 0; i < BAUD_TABLE_NO; i++)
 473                if (newspd == mxvar_baud_table[i])
 474                        break;
 475         if (i == BAUD_TABLE_NO) {
 476                 quot = info->baud_base / info->speed;
 477                 if (info->speed <= 0 || info->speed > info->max_baud)
 478                         quot = 0;
 479         } else {
 480                 if (newspd == 134) {
 481                         quot = (2 * info->baud_base / 269);
 482                 } else if (newspd) {
 483                         quot = info->baud_base / newspd;
 484                         if (quot == 0)
 485                                 quot = 1;
 486                 } else {
 487                         quot = 0;
 488                 }
 489         }
 490
 491         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 492         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 493
 494         if (quot) {
 495                 info->MCR |= UART_MCR_DTR;
 496                 outb(info->MCR, info->ioaddr + UART_MCR);
 497         } else {
 498                 info->MCR &= ~UART_MCR_DTR;
 499                 outb(info->MCR, info->ioaddr + UART_MCR);
 500                 return ret;
 501         }
 502
 503         cval = inb(info->ioaddr + UART_LCR);
 504
 505         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 506
 507         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 508         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 509         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 510
 511         if (i == BAUD_TABLE_NO) {
 512                 quot = info->baud_base % info->speed;
 513                 quot *= 8;
 514                 if ((quot % info->speed) > (info->speed / 2)) {
 515                         quot /= info->speed;
 516                         quot++;
 517                 } else {
 518                         quot /= info->speed;
 519                 }
 520                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 521         } else
 522                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 523
 524         return ret;
 525 }
 526
 527 /*
 528  * This routine is called to set the UART divisor registers to match
 529  * the specified baud rate for a serial port.
 530  */
 531 static int mxser_change_speed(struct mxser_port *info,
 532                 struct ktermios *old_termios)
 533 {
 534         unsigned cflag, cval, fcr;
 535         int ret = 0;
 536         unsigned char status;
 537         long baud;
 538
 539         if (!info->tty || !info->tty->termios)
 540                 return ret;
 541         cflag = info->tty->termios->c_cflag;
 542         if (!(info->ioaddr))
 543                 return ret;
 544
 545         if (mxser_set_baud_method[info->tty->index] == 0) {
 546                 if ((cflag & CBAUD) == B_SPEC)
 547                         baud = info->speed;
 548                 else
 549                         baud = tty_get_baud_rate(info->tty);
 550                 mxser_set_baud(info, baud);
 551         }
 552
 553         /* byte size and parity */
 554         switch (cflag & CSIZE) {
 555         case CS5:
 556                 cval = 0x00;
 557                 break;
 558         case CS6:
 559                 cval = 0x01;
 560                 break;
 561         case CS7:
 562                 cval = 0x02;
 563                 break;
 564         case CS8:
 565                 cval = 0x03;
 566                 break;
 567         default:
 568                 cval = 0x00;
 569                 break;          /* too keep GCC shut... */
 570         }
 571         if (cflag & CSTOPB)
 572                 cval |= 0x04;
 573         if (cflag & PARENB)
 574                 cval |= UART_LCR_PARITY;
 575         if (!(cflag & PARODD))
 576                 cval |= UART_LCR_EPAR;
 577         if (cflag & CMSPAR)
 578                 cval |= UART_LCR_SPAR;
 579
 580         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 581                 if (info->board->chip_flag) {
 582                         fcr = UART_FCR_ENABLE_FIFO;
 583                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 584                         SET_MOXA_MUST_FIFO_VALUE(info);
 585                 } else
 586                         fcr = 0;
 587         } else {
 588                 fcr = UART_FCR_ENABLE_FIFO;
 589                 if (info->board->chip_flag) {
 590                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 591                         SET_MOXA_MUST_FIFO_VALUE(info);
 592                 } else {
 593                         switch (info->rx_trigger) {
 594                         case 1:
 595                                 fcr |= UART_FCR_TRIGGER_1;
 596                                 break;
 597                         case 4:
 598                                 fcr |= UART_FCR_TRIGGER_4;
 599                                 break;
 600                         case 8:
 601                                 fcr |= UART_FCR_TRIGGER_8;
 602                                 break;
 603                         default:
 604                                 fcr |= UART_FCR_TRIGGER_14;
 605                                 break;
 606                         }
 607                 }
 608         }
 609
 610         /* CTS flow control flag and modem status interrupts */
 611         info->IER &= ~UART_IER_MSI;
 612         info->MCR &= ~UART_MCR_AFE;
 613         if (cflag & CRTSCTS) {
 614                 info->flags |= ASYNC_CTS_FLOW;
 615                 info->IER |= UART_IER_MSI;
 616                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 617                         info->MCR |= UART_MCR_AFE;
 618                 } else {
 619                         status = inb(info->ioaddr + UART_MSR);
 620                         if (info->tty->hw_stopped) {
 621                                 if (status & UART_MSR_CTS) {
 622                                         info->tty->hw_stopped = 0;
 623                                         if (info->type != PORT_16550A &&
 624                                                         !info->board->chip_flag) {
 625                                                 outb(info->IER & ~UART_IER_THRI,
 626                                                         info->ioaddr +
 627                                                         UART_IER);
 628                                                 info->IER |= UART_IER_THRI;
 629                                                 outb(info->IER, info->ioaddr +
 630                                                                 UART_IER);
 631                                         }
 632                                         tty_wakeup(info->tty);
 633                                 }
 634                         } else {
 635                                 if (!(status & UART_MSR_CTS)) {
 636                                         info->tty->hw_stopped = 1;
 637                                         if ((info->type != PORT_16550A) &&
 638                                                         (!info->board->chip_flag)) {
 639                                                 info->IER &= ~UART_IER_THRI;
 640                                                 outb(info->IER, info->ioaddr +
 641                                                                 UART_IER);
 642                                         }
 643                                 }
 644                         }
 645                 }
 646         } else {
 647                 info->flags &= ~ASYNC_CTS_FLOW;
 648         }
 649         outb(info->MCR, info->ioaddr + UART_MCR);
 650         if (cflag & CLOCAL) {
 651                 info->flags &= ~ASYNC_CHECK_CD;
 652         } else {
 653                 info->flags |= ASYNC_CHECK_CD;
 654                 info->IER |= UART_IER_MSI;
 655         }
 656         outb(info->IER, info->ioaddr + UART_IER);
 657
 658         /*
 659          * Set up parity check flag
 660          */
 661         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 662         if (I_INPCK(info->tty))
 663                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 664         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 665                 info->read_status_mask |= UART_LSR_BI;
 666
 667         info->ignore_status_mask = 0;
 668
 669         if (I_IGNBRK(info->tty)) {
 670                 info->ignore_status_mask |= UART_LSR_BI;
 671                 info->read_status_mask |= UART_LSR_BI;
 672                 /*
 673                  * If we're ignore parity and break indicators, ignore
 674                  * overruns too.  (For real raw support).
 675                  */
 676                 if (I_IGNPAR(info->tty)) {
 677                         info->ignore_status_mask |=
 678                                                 UART_LSR_OE |
 679                                                 UART_LSR_PE |
 680                                                 UART_LSR_FE;
 681                         info->read_status_mask |=
 682                                                 UART_LSR_OE |
 683                                                 UART_LSR_PE |
 684                                                 UART_LSR_FE;
 685                 }
 686         }
 687         if (info->board->chip_flag) {
 688                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 689                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 690                 if (I_IXON(info->tty)) {
 691                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 692                 } else {
 693                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 694                 }
 695                 if (I_IXOFF(info->tty)) {
 696                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 697                 } else {
 698                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 699                 }
 700         }
 701
 702
 703         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 704         outb(cval, info->ioaddr + UART_LCR);
 705
 706         return ret;
 707 }
 708
 709 static void mxser_check_modem_status(struct mxser_port *port, int status)
 710 {
 711         /* update input line counters */
 712         if (status & UART_MSR_TERI)
 713                 port->icount.rng++;
 714         if (status & UART_MSR_DDSR)
 715                 port->icount.dsr++;
 716         if (status & UART_MSR_DDCD)
 717                 port->icount.dcd++;
 718         if (status & UART_MSR_DCTS)
 719                 port->icount.cts++;
 720         port->mon_data.modem_status = status;
 721         wake_up_interruptible(&port->delta_msr_wait);
 722
 723         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 724                 if (status & UART_MSR_DCD)
 725                         wake_up_interruptible(&port->open_wait);
 726         }
 727
 728         if (port->flags & ASYNC_CTS_FLOW) {
 729                 if (port->tty->hw_stopped) {
 730                         if (status & UART_MSR_CTS) {
 731                                 port->tty->hw_stopped = 0;
 732
 733                                 if ((port->type != PORT_16550A) &&
 734                                                 (!port->board->chip_flag)) {
 735                                         outb(port->IER & ~UART_IER_THRI,
 736                                                 port->ioaddr + UART_IER);
 737                                         port->IER |= UART_IER_THRI;
 738                                         outb(port->IER, port->ioaddr +
 739                                                         UART_IER);
 740                                 }
 741                                 tty_wakeup(port->tty);
 742                         }
 743                 } else {
 744                         if (!(status & UART_MSR_CTS)) {
 745                                 port->tty->hw_stopped = 1;
 746                                 if (port->type != PORT_16550A &&
 747                                                 !port->board->chip_flag) {
 748                                         port->IER &= ~UART_IER_THRI;
 749                                         outb(port->IER, port->ioaddr +
 750                                                         UART_IER);
 751                                 }
 752                         }
 753                 }
 754         }
 755 }
 756
 757 static int mxser_startup(struct mxser_port *info)
 758 {
 759         unsigned long page;
 760         unsigned long flags;
 761
 762         page = __get_free_page(GFP_KERNEL);
 763         if (!page)
 764                 return -ENOMEM;
 765
 766         spin_lock_irqsave(&info->slock, flags);
 767
 768         if (info->flags & ASYNC_INITIALIZED) {
 769                 free_page(page);
 770                 spin_unlock_irqrestore(&info->slock, flags);
 771                 return 0;
 772         }
 773
 774         if (!info->ioaddr || !info->type) {
 775                 if (info->tty)
 776                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 777                 free_page(page);
 778                 spin_unlock_irqrestore(&info->slock, flags);
 779                 return 0;
 780         }
 781         if (info->xmit_buf)
 782                 free_page(page);
 783         else
 784                 info->xmit_buf = (unsigned char *) page;
 785
 786         /*
 787          * Clear the FIFO buffers and disable them
 788          * (they will be reenabled in mxser_change_speed())
 789          */
 790         if (info->board->chip_flag)
 791                 outb((UART_FCR_CLEAR_RCVR |
 792                         UART_FCR_CLEAR_XMIT |
 793                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 794         else
 795                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 796                         info->ioaddr + UART_FCR);
 797
 798         /*
 799          * At this point there's no way the LSR could still be 0xFF;
 800          * if it is, then bail out, because there's likely no UART
 801          * here.
 802          */
 803         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 804                 spin_unlock_irqrestore(&info->slock, flags);
 805                 if (capable(CAP_SYS_ADMIN)) {
 806                         if (info->tty)
 807                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 808                         return 0;
 809                 } else
 810                         return -ENODEV;
 811         }
 812
 813         /*
 814          * Clear the interrupt registers.
 815          */
 816         (void) inb(info->ioaddr + UART_LSR);
 817         (void) inb(info->ioaddr + UART_RX);
 818         (void) inb(info->ioaddr + UART_IIR);
 819         (void) inb(info->ioaddr + UART_MSR);
 820
 821         /*
 822          * Now, initialize the UART
 823          */
 824         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 825         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 826         outb(info->MCR, info->ioaddr + UART_MCR);
 827
 828         /*
 829          * Finally, enable interrupts
 830          */
 831         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 832
 833         if (info->board->chip_flag)
 834                 info->IER |= MOXA_MUST_IER_EGDAI;
 835         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 836
 837         /*
 838          * And clear the interrupt registers again for luck.
 839          */
 840         (void) inb(info->ioaddr + UART_LSR);
 841         (void) inb(info->ioaddr + UART_RX);
 842         (void) inb(info->ioaddr + UART_IIR);
 843         (void) inb(info->ioaddr + UART_MSR);
 844
 845         if (info->tty)
 846                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 847         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 848
 849         /*
 850          * and set the speed of the serial port
 851          */
 852         mxser_change_speed(info, NULL);
 853         info->flags |= ASYNC_INITIALIZED;
 854         spin_unlock_irqrestore(&info->slock, flags);
 855
 856         return 0;
 857 }
 858
 859 /*
 860  * This routine will shutdown a serial port; interrupts maybe disabled, and
 861  * DTR is dropped if the hangup on close termio flag is on.
 862  */
 863 static void mxser_shutdown(struct mxser_port *info)
 864 {
 865         unsigned long flags;
 866
 867         if (!(info->flags & ASYNC_INITIALIZED))
 868                 return;
 869
 870         spin_lock_irqsave(&info->slock, flags);
 871
 872         /*
 873          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 874          * here so the queue might never be waken up
 875          */
 876         wake_up_interruptible(&info->delta_msr_wait);
 877
 878         /*
 879          * Free the IRQ, if necessary
 880          */
 881         if (info->xmit_buf) {
 882                 free_page((unsigned long) info->xmit_buf);
 883                 info->xmit_buf = NULL;
 884         }
 885
 886         info->IER = 0;
 887         outb(0x00, info->ioaddr + UART_IER);
 888
 889         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 890                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 891         outb(info->MCR, info->ioaddr + UART_MCR);
 892
 893         /* clear Rx/Tx FIFO's */
 894         if (info->board->chip_flag)
 895                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 896                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 897                                 info->ioaddr + UART_FCR);
 898         else
 899                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 900                         info->ioaddr + UART_FCR);
 901
 902         /* read data port to reset things */
 903         (void) inb(info->ioaddr + UART_RX);
 904
 905         if (info->tty)
 906                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 907
 908         info->flags &= ~ASYNC_INITIALIZED;
 909
 910         if (info->board->chip_flag)
 911                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 912
 913         spin_unlock_irqrestore(&info->slock, flags);
 914 }
 915
 916 /*
 917  * This routine is called whenever a serial port is opened.  It
 918  * enables interrupts for a serial port, linking in its async structure into
 919  * the IRQ chain.   It also performs the serial-specific
 920  * initialization for the tty structure.
 921  */
 922 static int mxser_open(struct tty_struct *tty, struct file *filp)
 923 {
 924         struct mxser_port *info;
 925         unsigned long flags;
 926         int retval, line;
 927
 928         line = tty->index;
 929         if (line == MXSER_PORTS)
 930                 return 0;
 931         if (line < 0 || line > MXSER_PORTS)
 932                 return -ENODEV;
 933         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 934         if (!info->ioaddr)
 935                 return -ENODEV;
 936
 937         tty->driver_data = info;
 938         info->tty = tty;
 939         /*
 940          * Start up serial port
 941          */
 942         spin_lock_irqsave(&info->slock, flags);
 943         info->count++;
 944         spin_unlock_irqrestore(&info->slock, flags);
 945         retval = mxser_startup(info);
 946         if (retval)
 947                 return retval;
 948
 949         retval = mxser_block_til_ready(tty, filp, info);
 950         if (retval)
 951                 return retval;
 952
 953         /* unmark here for very high baud rate (ex. 921600 bps) used */
 954         tty->low_latency = 1;
 955         return 0;
 956 }
 957
 958 /*
 959  * This routine is called when the serial port gets closed.  First, we
 960  * wait for the last remaining data to be sent.  Then, we unlink its
 961  * async structure from the interrupt chain if necessary, and we free
 962  * that IRQ if nothing is left in the chain.
 963  */
 964 static void mxser_close(struct tty_struct *tty, struct file *filp)
 965 {
 966         struct mxser_port *info = tty->driver_data;
 967
 968         unsigned long timeout;
 969         unsigned long flags;
 970
 971         if (tty->index == MXSER_PORTS)
 972                 return;
 973         if (!info)
 974                 return;
 975
 976         spin_lock_irqsave(&info->slock, flags);
 977
 978         if (tty_hung_up_p(filp)) {
 979                 spin_unlock_irqrestore(&info->slock, flags);
 980                 return;
 981         }
 982         if ((tty->count == 1) && (info->count != 1)) {
 983                 /*
 984                  * Uh, oh.  tty->count is 1, which means that the tty
 985                  * structure will be freed.  Info->count should always
 986                  * be one in these conditions.  If it's greater than
 987                  * one, we've got real problems, since it means the
 988                  * serial port won't be shutdown.
 989                  */
 990                 printk(KERN_ERR "mxser_close: bad serial port count; "
 991                         "tty->count is 1, info->count is %d\n", info->count);
 992                 info->count = 1;
 993         }
 994         if (--info->count < 0) {
 995                 printk(KERN_ERR "mxser_close: bad serial port count for "
 996                         "ttys%d: %d\n", tty->index, info->count);
 997                 info->count = 0;
 998         }
 999         if (info->count) {
1000                 spin_unlock_irqrestore(&info->slock, flags);
1001                 return;
1002         }
1003         info->flags |= ASYNC_CLOSING;
1004         spin_unlock_irqrestore(&info->slock, flags);
1005         /*
1006          * Save the termios structure, since this port may have
1007          * separate termios for callout and dialin.
1008          */
1009         if (info->flags & ASYNC_NORMAL_ACTIVE)
1010                 info->normal_termios = *tty->termios;
1011         /*
1012          * Now we wait for the transmit buffer to clear; and we notify
1013          * the line discipline to only process XON/XOFF characters.
1014          */
1015         tty->closing = 1;
1016         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1017                 tty_wait_until_sent(tty, info->closing_wait);
1018         /*
1019          * At this point we stop accepting input.  To do this, we
1020          * disable the receive line status interrupts, and tell the
1021          * interrupt driver to stop checking the data ready bit in the
1022          * line status register.
1023          */
1024         info->IER &= ~UART_IER_RLSI;
1025         if (info->board->chip_flag)
1026                 info->IER &= ~MOXA_MUST_RECV_ISR;
1027
1028         if (info->flags & ASYNC_INITIALIZED) {
1029                 outb(info->IER, info->ioaddr + UART_IER);
1030                 /*
1031                  * Before we drop DTR, make sure the UART transmitter
1032                  * has completely drained; this is especially
1033                  * important if there is a transmit FIFO!
1034                  */
1035                 timeout = jiffies + HZ;
1036                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1037                         schedule_timeout_interruptible(5);
1038                         if (time_after(jiffies, timeout))
1039                                 break;
1040                 }
1041         }
1042         mxser_shutdown(info);
1043
1044         if (tty->driver->flush_buffer)
1045                 tty->driver->flush_buffer(tty);
1046
1047         tty_ldisc_flush(tty);
1048
1049         tty->closing = 0;
1050         info->event = 0;
1051         info->tty = NULL;
1052         if (info->blocked_open) {
1053                 if (info->close_delay)
1054                         schedule_timeout_interruptible(info->close_delay);
1055                 wake_up_interruptible(&info->open_wait);
1056         }
1057
1058         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1059 }
1060
1061 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1062 {
1063         int c, total = 0;
1064         struct mxser_port *info = tty->driver_data;
1065         unsigned long flags;
1066
1067         if (!info->xmit_buf)
1068                 return 0;
1069
1070         while (1) {
1071                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1072                                           SERIAL_XMIT_SIZE - info->xmit_head));
1073                 if (c <= 0)
1074                         break;
1075
1076                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1077                 spin_lock_irqsave(&info->slock, flags);
1078                 info->xmit_head = (info->xmit_head + c) &
1079                                   (SERIAL_XMIT_SIZE - 1);
1080                 info->xmit_cnt += c;
1081                 spin_unlock_irqrestore(&info->slock, flags);
1082
1083                 buf += c;
1084                 count -= c;
1085                 total += c;
1086         }
1087
1088         if (info->xmit_cnt && !tty->stopped) {
1089                 if (!tty->hw_stopped ||
1090                                 (info->type == PORT_16550A) ||
1091                                 (info->board->chip_flag)) {
1092                         spin_lock_irqsave(&info->slock, flags);
1093                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1094                                         UART_IER);
1095                         info->IER |= UART_IER_THRI;
1096                         outb(info->IER, info->ioaddr + UART_IER);
1097                         spin_unlock_irqrestore(&info->slock, flags);
1098                 }
1099         }
1100         return total;
1101 }
1102
1103 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1104 {
1105         struct mxser_port *info = tty->driver_data;
1106         unsigned long flags;
1107
1108         if (!info->xmit_buf)
1109                 return;
1110
1111         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1112                 return;
1113
1114         spin_lock_irqsave(&info->slock, flags);
1115         info->xmit_buf[info->xmit_head++] = ch;
1116         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1117         info->xmit_cnt++;
1118         spin_unlock_irqrestore(&info->slock, flags);
1119         if (!tty->stopped) {
1120                 if (!tty->hw_stopped ||
1121                                 (info->type == PORT_16550A) ||
1122                                 info->board->chip_flag) {
1123                         spin_lock_irqsave(&info->slock, flags);
1124                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1125                         info->IER |= UART_IER_THRI;
1126                         outb(info->IER, info->ioaddr + UART_IER);
1127                         spin_unlock_irqrestore(&info->slock, flags);
1128                 }
1129         }
1130 }
1131
1132
1133 static void mxser_flush_chars(struct tty_struct *tty)
1134 {
1135         struct mxser_port *info = tty->driver_data;
1136         unsigned long flags;
1137
1138         if (info->xmit_cnt <= 0 ||
1139                         tty->stopped ||
1140                         !info->xmit_buf ||
1141                         (tty->hw_stopped &&
1142                          (info->type != PORT_16550A) &&
1143                          (!info->board->chip_flag)
1144                         ))
1145                 return;
1146
1147         spin_lock_irqsave(&info->slock, flags);
1148
1149         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1150         info->IER |= UART_IER_THRI;
1151         outb(info->IER, info->ioaddr + UART_IER);
1152
1153         spin_unlock_irqrestore(&info->slock, flags);
1154 }
1155
1156 static int mxser_write_room(struct tty_struct *tty)
1157 {
1158         struct mxser_port *info = tty->driver_data;
1159         int ret;
1160
1161         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1162         if (ret < 0)
1163                 ret = 0;
1164         return ret;
1165 }
1166
1167 static int mxser_chars_in_buffer(struct tty_struct *tty)
1168 {
1169         struct mxser_port *info = tty->driver_data;
1170         return info->xmit_cnt;
1171 }
1172
1173 static void mxser_flush_buffer(struct tty_struct *tty)
1174 {
1175         struct mxser_port *info = tty->driver_data;
1176         char fcr;
1177         unsigned long flags;
1178
1179
1180         spin_lock_irqsave(&info->slock, flags);
1181         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1182
1183         fcr = inb(info->ioaddr + UART_FCR);
1184         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1185                 info->ioaddr + UART_FCR);
1186         outb(fcr, info->ioaddr + UART_FCR);
1187
1188         spin_unlock_irqrestore(&info->slock, flags);
1189
1190         tty_wakeup(tty);
1191 }
1192
1193 /*
1194  * ------------------------------------------------------------
1195  * friends of mxser_ioctl()
1196  * ------------------------------------------------------------
1197  */
1198 static int mxser_get_serial_info(struct mxser_port *info,
1199                 struct serial_struct __user *retinfo)
1200 {
1201         struct serial_struct tmp;
1202
1203         if (!retinfo)
1204                 return -EFAULT;
1205         memset(&tmp, 0, sizeof(tmp));
1206         tmp.type = info->type;
1207         tmp.line = info->tty->index;
1208         tmp.port = info->ioaddr;
1209         tmp.irq = info->board->irq;
1210         tmp.flags = info->flags;
1211         tmp.baud_base = info->baud_base;
1212         tmp.close_delay = info->close_delay;
1213         tmp.closing_wait = info->closing_wait;
1214         tmp.custom_divisor = info->custom_divisor;
1215         tmp.hub6 = 0;
1216         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1217                 return -EFAULT;
1218         return 0;
1219 }
1220
1221 static int mxser_set_serial_info(struct mxser_port *info,
1222                 struct serial_struct __user *new_info)
1223 {
1224         struct serial_struct new_serial;
1225         unsigned long sl_flags;
1226         unsigned int flags;
1227         int retval = 0;
1228
1229         if (!new_info || !info->ioaddr)
1230                 return -EFAULT;
1231         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1232                 return -EFAULT;
1233
1234         if ((new_serial.irq != info->board->irq) ||
1235                         (new_serial.port != info->ioaddr) ||
1236                         (new_serial.custom_divisor != info->custom_divisor) ||
1237                         (new_serial.baud_base != info->baud_base))
1238                 return -EPERM;
1239
1240         flags = info->flags & ASYNC_SPD_MASK;
1241
1242         if (!capable(CAP_SYS_ADMIN)) {
1243                 if ((new_serial.baud_base != info->baud_base) ||
1244                                 (new_serial.close_delay != info->close_delay) ||
1245                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1246                         return -EPERM;
1247                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1248                                 (new_serial.flags & ASYNC_USR_MASK));
1249         } else {
1250                 /*
1251                  * OK, past this point, all the error checking has been done.
1252                  * At this point, we start making changes.....
1253                  */
1254                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1255                                 (new_serial.flags & ASYNC_FLAGS));
1256                 info->close_delay = new_serial.close_delay * HZ / 100;
1257                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1258                 info->tty->low_latency =
1259                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1260                 info->tty->low_latency = 0;
1261         }
1262
1263         info->type = new_serial.type;
1264
1265         process_txrx_fifo(info);
1266
1267         if (info->flags & ASYNC_INITIALIZED) {
1268                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1269                         spin_lock_irqsave(&info->slock, sl_flags);
1270                         mxser_change_speed(info, NULL);
1271                         spin_unlock_irqrestore(&info->slock, sl_flags);
1272                 }
1273         } else
1274                 retval = mxser_startup(info);
1275
1276         return retval;
1277 }
1278
1279 /*
1280  * mxser_get_lsr_info - get line status register info
1281  *
1282  * Purpose: Let user call ioctl() to get info when the UART physically
1283  *          is emptied.  On bus types like RS485, the transmitter must
1284  *          release the bus after transmitting. This must be done when
1285  *          the transmit shift register is empty, not be done when the
1286  *          transmit holding register is empty.  This functionality
1287  *          allows an RS485 driver to be written in user space.
1288  */
1289 static int mxser_get_lsr_info(struct mxser_port *info,
1290                 unsigned int __user *value)
1291 {
1292         unsigned char status;
1293         unsigned int result;
1294         unsigned long flags;
1295
1296         spin_lock_irqsave(&info->slock, flags);
1297         status = inb(info->ioaddr + UART_LSR);
1298         spin_unlock_irqrestore(&info->slock, flags);
1299         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1300         return put_user(result, value);
1301 }
1302
1303 /*
1304  * This routine sends a break character out the serial port.
1305  */
1306 static void mxser_send_break(struct mxser_port *info, int duration)
1307 {
1308         unsigned long flags;
1309
1310         if (!info->ioaddr)
1311                 return;
1312         set_current_state(TASK_INTERRUPTIBLE);
1313         spin_lock_irqsave(&info->slock, flags);
1314         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1315                 info->ioaddr + UART_LCR);
1316         spin_unlock_irqrestore(&info->slock, flags);
1317         schedule_timeout(duration);
1318         spin_lock_irqsave(&info->slock, flags);
1319         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1320                 info->ioaddr + UART_LCR);
1321         spin_unlock_irqrestore(&info->slock, flags);
1322 }
1323
1324 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1325 {
1326         struct mxser_port *info = tty->driver_data;
1327         unsigned char control, status;
1328         unsigned long flags;
1329
1330
1331         if (tty->index == MXSER_PORTS)
1332                 return -ENOIOCTLCMD;
1333         if (test_bit(TTY_IO_ERROR, &tty->flags))
1334                 return -EIO;
1335
1336         control = info->MCR;
1337
1338         spin_lock_irqsave(&info->slock, flags);
1339         status = inb(info->ioaddr + UART_MSR);
1340         if (status & UART_MSR_ANY_DELTA)
1341                 mxser_check_modem_status(info, status);
1342         spin_unlock_irqrestore(&info->slock, flags);
1343         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1344                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1345                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1346                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1347                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1348                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1349 }
1350
1351 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1352                 unsigned int set, unsigned int clear)
1353 {
1354         struct mxser_port *info = tty->driver_data;
1355         unsigned long flags;
1356
1357
1358         if (tty->index == MXSER_PORTS)
1359                 return -ENOIOCTLCMD;
1360         if (test_bit(TTY_IO_ERROR, &tty->flags))
1361                 return -EIO;
1362
1363         spin_lock_irqsave(&info->slock, flags);
1364
1365         if (set & TIOCM_RTS)
1366                 info->MCR |= UART_MCR_RTS;
1367         if (set & TIOCM_DTR)
1368                 info->MCR |= UART_MCR_DTR;
1369
1370         if (clear & TIOCM_RTS)
1371                 info->MCR &= ~UART_MCR_RTS;
1372         if (clear & TIOCM_DTR)
1373                 info->MCR &= ~UART_MCR_DTR;
1374
1375         outb(info->MCR, info->ioaddr + UART_MCR);
1376         spin_unlock_irqrestore(&info->slock, flags);
1377         return 0;
1378 }
1379
1380 static int __init mxser_program_mode(int port)
1381 {
1382         int id, i, j, n;
1383
1384         outb(0, port);
1385         outb(0, port);
1386         outb(0, port);
1387         (void)inb(port);
1388         (void)inb(port);
1389         outb(0, port);
1390         (void)inb(port);
1391
1392         id = inb(port + 1) & 0x1F;
1393         if ((id != C168_ASIC_ID) &&
1394                         (id != C104_ASIC_ID) &&
1395                         (id != C102_ASIC_ID) &&
1396                         (id != CI132_ASIC_ID) &&
1397                         (id != CI134_ASIC_ID) &&
1398                         (id != CI104J_ASIC_ID))
1399                 return -1;
1400         for (i = 0, j = 0; i < 4; i++) {
1401                 n = inb(port + 2);
1402                 if (n == 'M') {
1403                         j = 1;
1404                 } else if ((j == 1) && (n == 1)) {
1405                         j = 2;
1406                         break;
1407                 } else
1408                         j = 0;
1409         }
1410         if (j != 2)
1411                 id = -2;
1412         return id;
1413 }
1414
1415 static void __init mxser_normal_mode(int port)
1416 {
1417         int i, n;
1418
1419         outb(0xA5, port + 1);
1420         outb(0x80, port + 3);
1421         outb(12, port + 0);     /* 9600 bps */
1422         outb(0, port + 1);
1423         outb(0x03, port + 3);   /* 8 data bits */
1424         outb(0x13, port + 4);   /* loop back mode */
1425         for (i = 0; i < 16; i++) {
1426                 n = inb(port + 5);
1427                 if ((n & 0x61) == 0x60)
1428                         break;
1429                 if ((n & 1) == 1)
1430                         (void)inb(port);
1431         }
1432         outb(0x00, port + 4);
1433 }
1434
1435 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1436 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1437 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1438 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1439 #define EN_CCMD         0x000   /* Chip's command register     */
1440 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1441 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1442 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1443 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1444 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1445 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1446 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1447 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1448 static int __init mxser_read_register(int port, unsigned short *regs)
1449 {
1450         int i, k, value, id;
1451         unsigned int j;
1452
1453         id = mxser_program_mode(port);
1454         if (id < 0)
1455                 return id;
1456         for (i = 0; i < 14; i++) {
1457                 k = (i & 0x3F) | 0x180;
1458                 for (j = 0x100; j > 0; j >>= 1) {
1459                         outb(CHIP_CS, port);
1460                         if (k & j) {
1461                                 outb(CHIP_CS | CHIP_DO, port);
1462                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1463                         } else {
1464                                 outb(CHIP_CS, port);
1465                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1466                         }
1467                 }
1468                 (void)inb(port);
1469                 value = 0;
1470                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1471                         outb(CHIP_CS, port);
1472                         outb(CHIP_CS | CHIP_SK, port);
1473                         if (inb(port) & CHIP_DI)
1474                                 value |= j;
1475                 }
1476                 regs[i] = value;
1477                 outb(0, port);
1478         }
1479         mxser_normal_mode(port);
1480         return id;
1481 }
1482
1483 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1484 {
1485         struct mxser_port *port;
1486         int result, status;
1487         unsigned int i, j;
1488
1489         switch (cmd) {
1490         case MOXA_GET_CONF:
1491 /*              if (copy_to_user(argp, mxsercfg,
1492                                 sizeof(struct mxser_hwconf) * 4))
1493                         return -EFAULT;
1494                 return 0;*/
1495                 return -ENXIO;
1496         case MOXA_GET_MAJOR:
1497                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1498                         return -EFAULT;
1499                 return 0;
1500
1501         case MOXA_GET_CUMAJOR:
1502                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1503                         return -EFAULT;
1504                 return 0;
1505
1506         case MOXA_CHKPORTENABLE:
1507                 result = 0;
1508
1509                 for (i = 0; i < MXSER_BOARDS; i++)
1510                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1511                                 if (mxser_boards[i].ports[j].ioaddr)
1512                                         result |= (1 << i);
1513
1514                 return put_user(result, (unsigned long __user *)argp);
1515         case MOXA_GETDATACOUNT:
1516                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1517                         return -EFAULT;
1518                 return 0;
1519         case MOXA_GETMSTATUS:
1520                 for (i = 0; i < MXSER_BOARDS; i++)
1521                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1522                                 port = &mxser_boards[i].ports[j];
1523
1524                                 GMStatus[i].ri = 0;
1525                                 if (!port->ioaddr) {
1526                                         GMStatus[i].dcd = 0;
1527                                         GMStatus[i].dsr = 0;
1528                                         GMStatus[i].cts = 0;
1529                                         continue;
1530                                 }
1531
1532                                 if (!port->tty || !port->tty->termios)
1533                                         GMStatus[i].cflag =
1534                                                 port->normal_termios.c_cflag;
1535                                 else
1536                                         GMStatus[i].cflag =
1537                                                 port->tty->termios->c_cflag;
1538
1539                                 status = inb(port->ioaddr + UART_MSR);
1540                                 if (status & 0x80 /*UART_MSR_DCD */ )
1541                                         GMStatus[i].dcd = 1;
1542                                 else
1543                                         GMStatus[i].dcd = 0;
1544
1545                                 if (status & 0x20 /*UART_MSR_DSR */ )
1546                                         GMStatus[i].dsr = 1;
1547                                 else
1548                                         GMStatus[i].dsr = 0;
1549
1550
1551                                 if (status & 0x10 /*UART_MSR_CTS */ )
1552                                         GMStatus[i].cts = 1;
1553                                 else
1554                                         GMStatus[i].cts = 0;
1555                         }
1556                 if (copy_to_user(argp, GMStatus,
1557                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1558                         return -EFAULT;
1559                 return 0;
1560         case MOXA_ASPP_MON_EXT: {
1561                 int p, shiftbit;
1562                 unsigned long opmode;
1563                 unsigned cflag, iflag;
1564
1565                 for (i = 0; i < MXSER_BOARDS; i++)
1566                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1567                                 port = &mxser_boards[i].ports[j];
1568                                 if (!port->ioaddr)
1569                                         continue;
1570
1571                                 status = mxser_get_msr(port->ioaddr, 0, i);
1572
1573                                 if (status & UART_MSR_TERI)
1574                                         port->icount.rng++;
1575                                 if (status & UART_MSR_DDSR)
1576                                         port->icount.dsr++;
1577                                 if (status & UART_MSR_DDCD)
1578                                         port->icount.dcd++;
1579                                 if (status & UART_MSR_DCTS)
1580                                         port->icount.cts++;
1581
1582                                 port->mon_data.modem_status = status;
1583                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1584                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1585                                 mon_data_ext.up_rxcnt[i] =
1586                                         port->mon_data.up_rxcnt;
1587                                 mon_data_ext.up_txcnt[i] =
1588                                         port->mon_data.up_txcnt;
1589                                 mon_data_ext.modem_status[i] =
1590                                         port->mon_data.modem_status;
1591                                 mon_data_ext.baudrate[i] = port->realbaud;
1592
1593                                 if (!port->tty || !port->tty->termios) {
1594                                         cflag = port->normal_termios.c_cflag;
1595                                         iflag = port->normal_termios.c_iflag;
1596                                 } else {
1597                                         cflag = port->tty->termios->c_cflag;
1598                                         iflag = port->tty->termios->c_iflag;
1599                                 }
1600
1601                                 mon_data_ext.databits[i] = cflag & CSIZE;
1602
1603                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1604
1605                                 mon_data_ext.parity[i] =
1606                                         cflag & (PARENB | PARODD | CMSPAR);
1607
1608                                 mon_data_ext.flowctrl[i] = 0x00;
1609
1610                                 if (cflag & CRTSCTS)
1611                                         mon_data_ext.flowctrl[i] |= 0x03;
1612
1613                                 if (iflag & (IXON | IXOFF))
1614                                         mon_data_ext.flowctrl[i] |= 0x0C;
1615
1616                                 if (port->type == PORT_16550A)
1617                                         mon_data_ext.fifo[i] = 1;
1618                                 else
1619                                         mon_data_ext.fifo[i] = 0;
1620
1621                                 p = i % 4;
1622                                 shiftbit = p * 2;
1623                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1624                                 opmode &= OP_MODE_MASK;
1625
1626                                 mon_data_ext.iftype[i] = opmode;
1627
1628                         }
1629                         if (copy_to_user(argp, &mon_data_ext,
1630                                                 sizeof(mon_data_ext)))
1631                                 return -EFAULT;
1632
1633                         return 0;
1634
1635         } default:
1636                 return -ENOIOCTLCMD;
1637         }
1638         return 0;
1639 }
1640
1641 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1642                 unsigned int cmd, unsigned long arg)
1643 {
1644         struct mxser_port *info = tty->driver_data;
1645         struct async_icount cprev, cnow;        /* kernel counter temps */
1646         struct serial_icounter_struct __user *p_cuser;
1647         unsigned long templ;
1648         unsigned long flags;
1649         unsigned int i;
1650         void __user *argp = (void __user *)arg;
1651         int retval;
1652
1653         if (tty->index == MXSER_PORTS)
1654                 return mxser_ioctl_special(cmd, argp);
1655
1656         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1657                 int p;
1658                 unsigned long opmode;
1659                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1660                 int shiftbit;
1661                 unsigned char val, mask;
1662
1663                 p = tty->index % 4;
1664                 if (cmd == MOXA_SET_OP_MODE) {
1665                         if (get_user(opmode, (int __user *) argp))
1666                                 return -EFAULT;
1667                         if (opmode != RS232_MODE &&
1668                                         opmode != RS485_2WIRE_MODE &&
1669                                         opmode != RS422_MODE &&
1670                                         opmode != RS485_4WIRE_MODE)
1671                                 return -EFAULT;
1672                         mask = ModeMask[p];
1673                         shiftbit = p * 2;
1674                         val = inb(info->opmode_ioaddr);
1675                         val &= mask;
1676                         val |= (opmode << shiftbit);
1677                         outb(val, info->opmode_ioaddr);
1678                 } else {
1679                         shiftbit = p * 2;
1680                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1681                         opmode &= OP_MODE_MASK;
1682                         if (copy_to_user(argp, &opmode, sizeof(int)))
1683                                 return -EFAULT;
1684                 }
1685                 return 0;
1686         }
1687
1688         if (cmd == MOXA_SET_SPECIAL_BAUD_RATE) {
1689                 int speed;
1690
1691                 if (get_user(speed, (int __user *)argp))
1692                         return -EFAULT;
1693                 if (speed <= 0 || speed > info->max_baud)
1694                         return -EFAULT;
1695                 if (!info->tty || !info->tty->termios || !info->ioaddr)
1696                         return 0;
1697                 info->tty->termios->c_cflag &= ~(CBAUD | CBAUDEX);
1698                 for (i = 0; i < BAUD_TABLE_NO; i++)
1699                         if (speed == mxvar_baud_table[i])
1700                                 break;
1701                 if (i == BAUD_TABLE_NO) {
1702                         info->tty->termios->c_cflag |= B_SPEC;
1703                 } else if (speed != 0)
1704                         info->tty->termios->c_cflag |= mxvar_baud_table1[i];
1705
1706                 info->speed = speed;
1707                 spin_lock_irqsave(&info->slock, flags);
1708                 mxser_change_speed(info, NULL);
1709                 spin_unlock_irqrestore(&info->slock, flags);
1710
1711                 return 0;
1712         } else if (cmd == MOXA_GET_SPECIAL_BAUD_RATE) {
1713                 if (copy_to_user(argp, &info->speed, sizeof(int)))
1714                      return -EFAULT;
1715                 return 0;
1716         }
1717
1718         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1719                         test_bit(TTY_IO_ERROR, &tty->flags))
1720                 return -EIO;
1721
1722         switch (cmd) {
1723         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1724                 retval = tty_check_change(tty);
1725                 if (retval)
1726                         return retval;
1727                 tty_wait_until_sent(tty, 0);
1728                 if (!arg)
1729                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1730                 return 0;
1731         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1732                 retval = tty_check_change(tty);
1733                 if (retval)
1734                         return retval;
1735                 tty_wait_until_sent(tty, 0);
1736                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1737                 return 0;
1738         case TIOCGSOFTCAR:
1739                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1740         case TIOCSSOFTCAR:
1741                 if (get_user(templ, (unsigned long __user *) argp))
1742                         return -EFAULT;
1743                 arg = templ;
1744                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1745                 return 0;
1746         case TIOCGSERIAL:
1747                 return mxser_get_serial_info(info, argp);
1748         case TIOCSSERIAL:
1749                 return mxser_set_serial_info(info, argp);
1750         case TIOCSERGETLSR:     /* Get line status register */
1751                 return mxser_get_lsr_info(info, argp);
1752                 /*
1753                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1754                  * - mask passed in arg for lines of interest
1755                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1756                  * Caller should use TIOCGICOUNT to see which one it was
1757                  */
1758         case TIOCMIWAIT:
1759                 spin_lock_irqsave(&info->slock, flags);
1760                 cnow = info->icount;    /* note the counters on entry */
1761                 spin_unlock_irqrestore(&info->slock, flags);
1762
1763                 wait_event_interruptible(info->delta_msr_wait, ({
1764                         cprev = cnow;
1765                         spin_lock_irqsave(&info->slock, flags);
1766                         cnow = info->icount;    /* atomic copy */
1767                         spin_unlock_irqrestore(&info->slock, flags);
1768
1769                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1770                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1771                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1772                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1773                 }));
1774                 break;
1775         /*
1776          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1777          * Return: write counters to the user passed counter struct
1778          * NB: both 1->0 and 0->1 transitions are counted except for
1779          *     RI where only 0->1 is counted.
1780          */
1781         case TIOCGICOUNT:
1782                 spin_lock_irqsave(&info->slock, flags);
1783                 cnow = info->icount;
1784                 spin_unlock_irqrestore(&info->slock, flags);
1785                 p_cuser = argp;
1786                 if (put_user(cnow.frame, &p_cuser->frame))
1787                         return -EFAULT;
1788                 if (put_user(cnow.brk, &p_cuser->brk))
1789                         return -EFAULT;
1790                 if (put_user(cnow.overrun, &p_cuser->overrun))
1791                         return -EFAULT;
1792                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1793                         return -EFAULT;
1794                 if (put_user(cnow.parity, &p_cuser->parity))
1795                         return -EFAULT;
1796                 if (put_user(cnow.rx, &p_cuser->rx))
1797                         return -EFAULT;
1798                 if (put_user(cnow.tx, &p_cuser->tx))
1799                         return -EFAULT;
1800                 put_user(cnow.cts, &p_cuser->cts);
1801                 put_user(cnow.dsr, &p_cuser->dsr);
1802                 put_user(cnow.rng, &p_cuser->rng);
1803                 put_user(cnow.dcd, &p_cuser->dcd);
1804                 return 0;
1805         case MOXA_HighSpeedOn:
1806                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1807         case MOXA_SDS_RSTICOUNTER:
1808                 info->mon_data.rxcnt = 0;
1809                 info->mon_data.txcnt = 0;
1810                 return 0;
1811         case MOXA_ASPP_SETBAUD:{
1812                 long baud;
1813                 if (get_user(baud, (long __user *)argp))
1814                         return -EFAULT;
1815                 spin_lock_irqsave(&info->slock, flags);
1816                 mxser_set_baud(info, baud);
1817                 spin_unlock_irqrestore(&info->slock, flags);
1818                 return 0;
1819         }
1820         case MOXA_ASPP_GETBAUD:
1821                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1822                         return -EFAULT;
1823
1824                 return 0;
1825
1826         case MOXA_ASPP_OQUEUE:{
1827                 int len, lsr;
1828
1829                 len = mxser_chars_in_buffer(tty);
1830
1831                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1832
1833                 len += (lsr ? 0 : 1);
1834
1835                 if (copy_to_user(argp, &len, sizeof(int)))
1836                         return -EFAULT;
1837
1838                 return 0;
1839         }
1840         case MOXA_ASPP_MON: {
1841                 int mcr, status;
1842
1843                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1844                 mxser_check_modem_status(info, status);
1845
1846                 mcr = inb(info->ioaddr + UART_MCR);
1847                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1848                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1849                 else
1850                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1851
1852                 if (mcr & MOXA_MUST_MCR_TX_XON)
1853                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1854                 else
1855                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1856
1857                 if (info->tty->hw_stopped)
1858                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1859                 else
1860                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1861
1862                 if (copy_to_user(argp, &info->mon_data,
1863                                 sizeof(struct mxser_mon)))
1864                         return -EFAULT;
1865
1866                 return 0;
1867         }
1868         case MOXA_ASPP_LSTATUS: {
1869                 if (copy_to_user(argp, &info->err_shadow,
1870                                 sizeof(unsigned char)))
1871                         return -EFAULT;
1872
1873                 info->err_shadow = 0;
1874                 return 0;
1875         }
1876         case MOXA_SET_BAUD_METHOD: {
1877                 int method;
1878
1879                 if (get_user(method, (int __user *)argp))
1880                         return -EFAULT;
1881                 mxser_set_baud_method[tty->index] = method;
1882                 if (copy_to_user(argp, &method, sizeof(int)))
1883                         return -EFAULT;
1884
1885                 return 0;
1886         }
1887         default:
1888                 return -ENOIOCTLCMD;
1889         }
1890         return 0;
1891 }
1892
1893 static void mxser_stoprx(struct tty_struct *tty)
1894 {
1895         struct mxser_port *info = tty->driver_data;
1896
1897         info->ldisc_stop_rx = 1;
1898         if (I_IXOFF(tty)) {
1899                 if (info->board->chip_flag) {
1900                         info->IER &= ~MOXA_MUST_RECV_ISR;
1901                         outb(info->IER, info->ioaddr + UART_IER);
1902                 } else {
1903                         info->x_char = STOP_CHAR(tty);
1904                         outb(0, info->ioaddr + UART_IER);
1905                         info->IER |= UART_IER_THRI;
1906                         outb(info->IER, info->ioaddr + UART_IER);
1907                 }
1908         }
1909
1910         if (info->tty->termios->c_cflag & CRTSCTS) {
1911                 info->MCR &= ~UART_MCR_RTS;
1912                 outb(info->MCR, info->ioaddr + UART_MCR);
1913         }
1914 }
1915
1916 /*
1917  * This routine is called by the upper-layer tty layer to signal that
1918  * incoming characters should be throttled.
1919  */
1920 static void mxser_throttle(struct tty_struct *tty)
1921 {
1922         mxser_stoprx(tty);
1923 }
1924
1925 static void mxser_unthrottle(struct tty_struct *tty)
1926 {
1927         struct mxser_port *info = tty->driver_data;
1928
1929         /* startrx */
1930         info->ldisc_stop_rx = 0;
1931         if (I_IXOFF(tty)) {
1932                 if (info->x_char)
1933                         info->x_char = 0;
1934                 else {
1935                         if (info->board->chip_flag) {
1936                                 info->IER |= MOXA_MUST_RECV_ISR;
1937                                 outb(info->IER, info->ioaddr + UART_IER);
1938                         } else {
1939                                 info->x_char = START_CHAR(tty);
1940                                 outb(0, info->ioaddr + UART_IER);
1941                                 info->IER |= UART_IER_THRI;
1942                                 outb(info->IER, info->ioaddr + UART_IER);
1943                         }
1944                 }
1945         }
1946
1947         if (info->tty->termios->c_cflag & CRTSCTS) {
1948                 info->MCR |= UART_MCR_RTS;
1949                 outb(info->MCR, info->ioaddr + UART_MCR);
1950         }
1951 }
1952
1953 /*
1954  * mxser_stop() and mxser_start()
1955  *
1956  * This routines are called before setting or resetting tty->stopped.
1957  * They enable or disable transmitter interrupts, as necessary.
1958  */
1959 static void mxser_stop(struct tty_struct *tty)
1960 {
1961         struct mxser_port *info = tty->driver_data;
1962         unsigned long flags;
1963
1964         spin_lock_irqsave(&info->slock, flags);
1965         if (info->IER & UART_IER_THRI) {
1966                 info->IER &= ~UART_IER_THRI;
1967                 outb(info->IER, info->ioaddr + UART_IER);
1968         }
1969         spin_unlock_irqrestore(&info->slock, flags);
1970 }
1971
1972 static void mxser_start(struct tty_struct *tty)
1973 {
1974         struct mxser_port *info = tty->driver_data;
1975         unsigned long flags;
1976
1977         spin_lock_irqsave(&info->slock, flags);
1978         if (info->xmit_cnt && info->xmit_buf) {
1979                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1980                 info->IER |= UART_IER_THRI;
1981                 outb(info->IER, info->ioaddr + UART_IER);
1982         }
1983         spin_unlock_irqrestore(&info->slock, flags);
1984 }
1985
1986 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1987 {
1988         struct mxser_port *info = tty->driver_data;
1989         unsigned long flags;
1990
1991         spin_lock_irqsave(&info->slock, flags);
1992         mxser_change_speed(info, old_termios);
1993         spin_unlock_irqrestore(&info->slock, flags);
1994
1995         if ((old_termios->c_cflag & CRTSCTS) &&
1996                         !(tty->termios->c_cflag & CRTSCTS)) {
1997                 tty->hw_stopped = 0;
1998                 mxser_start(tty);
1999         }
2000
2001         /* Handle sw stopped */
2002         if ((old_termios->c_iflag & IXON) &&
2003                         !(tty->termios->c_iflag & IXON)) {
2004                 tty->stopped = 0;
2005
2006                 if (info->board->chip_flag) {
2007                         spin_lock_irqsave(&info->slock, flags);
2008                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2009                         spin_unlock_irqrestore(&info->slock, flags);
2010                 }
2011
2012                 mxser_start(tty);
2013         }
2014 }
2015
2016 /*
2017  * mxser_wait_until_sent() --- wait until the transmitter is empty
2018  */
2019 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2020 {
2021         struct mxser_port *info = tty->driver_data;
2022         unsigned long orig_jiffies, char_time;
2023         int lsr;
2024
2025         if (info->type == PORT_UNKNOWN)
2026                 return;
2027
2028         if (info->xmit_fifo_size == 0)
2029                 return;         /* Just in case.... */
2030
2031         orig_jiffies = jiffies;
2032         /*
2033          * Set the check interval to be 1/5 of the estimated time to
2034          * send a single character, and make it at least 1.  The check
2035          * interval should also be less than the timeout.
2036          *
2037          * Note: we have to use pretty tight timings here to satisfy
2038          * the NIST-PCTS.
2039          */
2040         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2041         char_time = char_time / 5;
2042         if (char_time == 0)
2043                 char_time = 1;
2044         if (timeout && timeout < char_time)
2045                 char_time = timeout;
2046         /*
2047          * If the transmitter hasn't cleared in twice the approximate
2048          * amount of time to send the entire FIFO, it probably won't
2049          * ever clear.  This assumes the UART isn't doing flow
2050          * control, which is currently the case.  Hence, if it ever
2051          * takes longer than info->timeout, this is probably due to a
2052          * UART bug of some kind.  So, we clamp the timeout parameter at
2053          * 2*info->timeout.
2054          */
2055         if (!timeout || timeout > 2 * info->timeout)
2056                 timeout = 2 * info->timeout;
2057 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2058         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2059                 timeout, char_time);
2060         printk("jiff=%lu...", jiffies);
2061 #endif
2062         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2063 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2064                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2065 #endif
2066                 schedule_timeout_interruptible(char_time);
2067                 if (signal_pending(current))
2068                         break;
2069                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2070                         break;
2071         }
2072         set_current_state(TASK_RUNNING);
2073
2074 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2075         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2076 #endif
2077 }
2078
2079 /*
2080  * This routine is called by tty_hangup() when a hangup is signaled.
2081  */
2082 static void mxser_hangup(struct tty_struct *tty)
2083 {
2084         struct mxser_port *info = tty->driver_data;
2085
2086         mxser_flush_buffer(tty);
2087         mxser_shutdown(info);
2088         info->event = 0;
2089         info->count = 0;
2090         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2091         info->tty = NULL;
2092         wake_up_interruptible(&info->open_wait);
2093 }
2094
2095 /*
2096  * mxser_rs_break() --- routine which turns the break handling on or off
2097  */
2098 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2099 {
2100         struct mxser_port *info = tty->driver_data;
2101         unsigned long flags;
2102
2103         spin_lock_irqsave(&info->slock, flags);
2104         if (break_state == -1)
2105                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2106                         info->ioaddr + UART_LCR);
2107         else
2108                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2109                         info->ioaddr + UART_LCR);
2110         spin_unlock_irqrestore(&info->slock, flags);
2111 }
2112
2113 static void mxser_receive_chars(struct mxser_port *port, int *status)
2114 {
2115         struct tty_struct *tty = port->tty;
2116         unsigned char ch, gdl;
2117         int ignored = 0;
2118         int cnt = 0;
2119         int recv_room;
2120         int max = 256;
2121
2122         recv_room = tty->receive_room;
2123         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2124                 mxser_stoprx(tty);
2125
2126         if (port->board->chip_flag != MOXA_OTHER_UART) {
2127
2128                 if (*status & UART_LSR_SPECIAL)
2129                         goto intr_old;
2130                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2131                                 (*status & MOXA_MUST_LSR_RERR))
2132                         goto intr_old;
2133                 if (*status & MOXA_MUST_LSR_RERR)
2134                         goto intr_old;
2135
2136                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2137
2138                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2139                         gdl &= MOXA_MUST_GDL_MASK;
2140                 if (gdl >= recv_room) {
2141                         if (!port->ldisc_stop_rx)
2142                                 mxser_stoprx(tty);
2143                 }
2144                 while (gdl--) {
2145                         ch = inb(port->ioaddr + UART_RX);
2146                         tty_insert_flip_char(tty, ch, 0);
2147                         cnt++;
2148                 }
2149                 goto end_intr;
2150         }
2151 intr_old:
2152
2153         do {
2154                 if (max-- < 0)
2155                         break;
2156
2157                 ch = inb(port->ioaddr + UART_RX);
2158                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2159                         outb(0x23, port->ioaddr + UART_FCR);
2160                 *status &= port->read_status_mask;
2161                 if (*status & port->ignore_status_mask) {
2162                         if (++ignored > 100)
2163                                 break;
2164                 } else {
2165                         char flag = 0;
2166                         if (*status & UART_LSR_SPECIAL) {
2167                                 if (*status & UART_LSR_BI) {
2168                                         flag = TTY_BREAK;
2169                                         port->icount.brk++;
2170
2171                                         if (port->flags & ASYNC_SAK)
2172                                                 do_SAK(tty);
2173                                 } else if (*status & UART_LSR_PE) {
2174                                         flag = TTY_PARITY;
2175                                         port->icount.parity++;
2176                                 } else if (*status & UART_LSR_FE) {
2177                                         flag = TTY_FRAME;
2178                                         port->icount.frame++;
2179                                 } else if (*status & UART_LSR_OE) {
2180                                         flag = TTY_OVERRUN;
2181                                         port->icount.overrun++;
2182                                 } else
2183                                         flag = TTY_BREAK;
2184                         }
2185                         tty_insert_flip_char(tty, ch, flag);
2186                         cnt++;
2187                         if (cnt >= recv_room) {
2188                                 if (!port->ldisc_stop_rx)
2189                                         mxser_stoprx(tty);
2190                                 break;
2191                         }
2192
2193                 }
2194
2195                 if (port->board->chip_flag)
2196                         break;
2197
2198                 *status = inb(port->ioaddr + UART_LSR);
2199         } while (*status & UART_LSR_DR);
2200
2201 end_intr:
2202         mxvar_log.rxcnt[port->tty->index] += cnt;
2203         port->mon_data.rxcnt += cnt;
2204         port->mon_data.up_rxcnt += cnt;
2205
2206         /*
2207          * We are called from an interrupt context with &port->slock
2208          * being held. Drop it temporarily in order to prevent
2209          * recursive locking.
2210          */
2211         spin_unlock(&port->slock);
2212         tty_flip_buffer_push(tty);
2213         spin_lock(&port->slock);
2214 }
2215
2216 static void mxser_transmit_chars(struct mxser_port *port)
2217 {
2218         int count, cnt;
2219
2220         if (port->x_char) {
2221                 outb(port->x_char, port->ioaddr + UART_TX);
2222                 port->x_char = 0;
2223                 mxvar_log.txcnt[port->tty->index]++;
2224                 port->mon_data.txcnt++;
2225                 port->mon_data.up_txcnt++;
2226                 port->icount.tx++;
2227                 return;
2228         }
2229
2230         if (port->xmit_buf == 0)
2231                 return;
2232
2233         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2234                         (port->tty->hw_stopped &&
2235                         (port->type != PORT_16550A) &&
2236                         (!port->board->chip_flag))) {
2237                 port->IER &= ~UART_IER_THRI;
2238                 outb(port->IER, port->ioaddr + UART_IER);
2239                 return;
2240         }
2241
2242         cnt = port->xmit_cnt;
2243         count = port->xmit_fifo_size;
2244         do {
2245                 outb(port->xmit_buf[port->xmit_tail++],
2246                         port->ioaddr + UART_TX);
2247                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2248                 if (--port->xmit_cnt <= 0)
2249                         break;
2250         } while (--count > 0);
2251         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2252
2253         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2254         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2255         port->icount.tx += (cnt - port->xmit_cnt);
2256
2257         if (port->xmit_cnt < WAKEUP_CHARS)
2258                 tty_wakeup(port->tty);
2259
2260         if (port->xmit_cnt <= 0) {
2261                 port->IER &= ~UART_IER_THRI;
2262                 outb(port->IER, port->ioaddr + UART_IER);
2263         }
2264 }
2265
2266 /*
2267  * This is the serial driver's generic interrupt routine
2268  */
2269 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2270 {
2271         int status, iir, i;
2272         struct mxser_board *brd = NULL;
2273         struct mxser_port *port;
2274         int max, irqbits, bits, msr;
2275         unsigned int int_cnt, pass_counter = 0;
2276         int handled = IRQ_NONE;
2277
2278         for (i = 0; i < MXSER_BOARDS; i++)
2279                 if (dev_id == &mxser_boards[i]) {
2280                         brd = dev_id;
2281                         break;
2282                 }
2283
2284         if (i == MXSER_BOARDS)
2285                 goto irq_stop;
2286         if (brd == NULL)
2287                 goto irq_stop;
2288         max = brd->info->nports;
2289         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2290                 irqbits = inb(brd->vector) & brd->vector_mask;
2291                 if (irqbits == brd->vector_mask)
2292                         break;
2293
2294                 handled = IRQ_HANDLED;
2295                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2296                         if (irqbits == brd->vector_mask)
2297                                 break;
2298                         if (bits & irqbits)
2299                                 continue;
2300                         port = &brd->ports[i];
2301
2302                         int_cnt = 0;
2303                         spin_lock(&port->slock);
2304                         do {
2305                                 iir = inb(port->ioaddr + UART_IIR);
2306                                 if (iir & UART_IIR_NO_INT)
2307                                         break;
2308                                 iir &= MOXA_MUST_IIR_MASK;
2309                                 if (!port->tty ||
2310                                                 (port->flags & ASYNC_CLOSING) ||
2311                                                 !(port->flags &
2312                                                         ASYNC_INITIALIZED)) {
2313                                         status = inb(port->ioaddr + UART_LSR);
2314                                         outb(0x27, port->ioaddr + UART_FCR);
2315                                         inb(port->ioaddr + UART_MSR);
2316                                         break;
2317                                 }
2318
2319                                 status = inb(port->ioaddr + UART_LSR);
2320
2321                                 if (status & UART_LSR_PE)
2322                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2323                                 if (status & UART_LSR_FE)
2324                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2325                                 if (status & UART_LSR_OE)
2326                                         port->err_shadow |=
2327                                                 NPPI_NOTIFY_HW_OVERRUN;
2328                                 if (status & UART_LSR_BI)
2329                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2330
2331                                 if (port->board->chip_flag) {
2332                                         if (iir == MOXA_MUST_IIR_GDA ||
2333                                             iir == MOXA_MUST_IIR_RDA ||
2334                                             iir == MOXA_MUST_IIR_RTO ||
2335                                             iir == MOXA_MUST_IIR_LSR)
2336                                                 mxser_receive_chars(port,
2337                                                                 &status);
2338
2339                                 } else {
2340                                         status &= port->read_status_mask;
2341                                         if (status & UART_LSR_DR)
2342                                                 mxser_receive_chars(port,
2343                                                                 &status);
2344                                 }
2345                                 msr = inb(port->ioaddr + UART_MSR);
2346                                 if (msr & UART_MSR_ANY_DELTA)
2347                                         mxser_check_modem_status(port, msr);
2348
2349                                 if (port->board->chip_flag) {
2350                                         if (iir == 0x02 && (status &
2351                                                                 UART_LSR_THRE))
2352                                                 mxser_transmit_chars(port);
2353                                 } else {
2354                                         if (status & UART_LSR_THRE)
2355                                                 mxser_transmit_chars(port);
2356                                 }
2357                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2358                         spin_unlock(&port->slock);
2359                 }
2360         }
2361
2362 irq_stop:
2363         return handled;
2364 }
2365
2366 static const struct tty_operations mxser_ops = {
2367         .open = mxser_open,
2368         .close = mxser_close,
2369         .write = mxser_write,
2370         .put_char = mxser_put_char,
2371         .flush_chars = mxser_flush_chars,
2372         .write_room = mxser_write_room,
2373         .chars_in_buffer = mxser_chars_in_buffer,
2374         .flush_buffer = mxser_flush_buffer,
2375         .ioctl = mxser_ioctl,
2376         .throttle = mxser_throttle,
2377         .unthrottle = mxser_unthrottle,
2378         .set_termios = mxser_set_termios,
2379         .stop = mxser_stop,
2380         .start = mxser_start,
2381         .hangup = mxser_hangup,
2382         .break_ctl = mxser_rs_break,
2383         .wait_until_sent = mxser_wait_until_sent,
2384         .tiocmget = mxser_tiocmget,
2385         .tiocmset = mxser_tiocmset,
2386 };
2387
2388 /*
2389  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2390  */
2391
2392 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2393                 unsigned int irq)
2394 {
2395         if (irq)
2396                 free_irq(brd->irq, brd);
2397         if (pdev != NULL) {     /* PCI */
2398 #ifdef CONFIG_PCI
2399                 pci_release_region(pdev, 2);
2400                 pci_release_region(pdev, 3);
2401 #endif
2402         } else {
2403                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2404                 release_region(brd->vector, 1);
2405         }
2406 }
2407
2408 static int __devinit mxser_initbrd(struct mxser_board *brd,
2409                 struct pci_dev *pdev)
2410 {
2411         struct mxser_port *info;
2412         unsigned int i;
2413         int retval;
2414
2415         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2416
2417         for (i = 0; i < brd->info->nports; i++) {
2418                 info = &brd->ports[i];
2419                 info->board = brd;
2420                 info->stop_rx = 0;
2421                 info->ldisc_stop_rx = 0;
2422
2423                 /* Enhance mode enabled here */
2424                 if (brd->chip_flag != MOXA_OTHER_UART)
2425                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2426
2427                 info->flags = ASYNC_SHARE_IRQ;
2428                 info->type = brd->uart_type;
2429
2430                 process_txrx_fifo(info);
2431
2432                 info->custom_divisor = info->baud_base * 16;
2433                 info->close_delay = 5 * HZ / 10;
2434                 info->closing_wait = 30 * HZ;
2435                 info->normal_termios = mxvar_sdriver->init_termios;
2436                 init_waitqueue_head(&info->open_wait);
2437                 init_waitqueue_head(&info->delta_msr_wait);
2438                 info->speed = 9600;
2439                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2440                 info->err_shadow = 0;
2441                 spin_lock_init(&info->slock);
2442
2443                 /* before set INT ISR, disable all int */
2444                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2445                         info->ioaddr + UART_IER);
2446         }
2447
2448         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2449                         brd);
2450         if (retval) {
2451                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2452                         "conflict with another device.\n",
2453                         brd->info->name, brd->irq);
2454                 /* We hold resources, we need to release them. */
2455                 mxser_release_res(brd, pdev, 0);
2456         }
2457         return retval;
2458 }
2459
2460 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2461 {
2462         int id, i, bits;
2463         unsigned short regs[16], irq;
2464         unsigned char scratch, scratch2;
2465
2466         brd->chip_flag = MOXA_OTHER_UART;
2467
2468         id = mxser_read_register(cap, regs);
2469         switch (id) {
2470         case C168_ASIC_ID:
2471                 brd->info = &mxser_cards[0];
2472                 break;
2473         case C104_ASIC_ID:
2474                 brd->info = &mxser_cards[1];
2475                 break;
2476         case CI104J_ASIC_ID:
2477                 brd->info = &mxser_cards[2];
2478                 break;
2479         case C102_ASIC_ID:
2480                 brd->info = &mxser_cards[5];
2481                 break;
2482         case CI132_ASIC_ID:
2483                 brd->info = &mxser_cards[6];
2484                 break;
2485         case CI134_ASIC_ID:
2486                 brd->info = &mxser_cards[7];
2487                 break;
2488         default:
2489                 return 0;
2490         }
2491
2492         irq = 0;
2493         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2494            Flag-hack checks if configuration should be read as 2-port here. */
2495         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2496                 irq = regs[9] & 0xF000;
2497                 irq = irq | (irq >> 4);
2498                 if (irq != (regs[9] & 0xFF00))
2499                         return MXSER_ERR_IRQ_CONFLIT;
2500         } else if (brd->info->nports == 4) {
2501                 irq = regs[9] & 0xF000;
2502                 irq = irq | (irq >> 4);
2503                 irq = irq | (irq >> 8);
2504                 if (irq != regs[9])
2505                         return MXSER_ERR_IRQ_CONFLIT;
2506         } else if (brd->info->nports == 8) {
2507                 irq = regs[9] & 0xF000;
2508                 irq = irq | (irq >> 4);
2509                 irq = irq | (irq >> 8);
2510                 if ((irq != regs[9]) || (irq != regs[10]))
2511                         return MXSER_ERR_IRQ_CONFLIT;
2512         }
2513
2514         if (!irq)
2515                 return MXSER_ERR_IRQ;
2516         brd->irq = ((int)(irq & 0xF000) >> 12);
2517         for (i = 0; i < 8; i++)
2518                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2519         if ((regs[12] & 0x80) == 0)
2520                 return MXSER_ERR_VECTOR;
2521         brd->vector = (int)regs[11];    /* interrupt vector */
2522         if (id == 1)
2523                 brd->vector_mask = 0x00FF;
2524         else
2525                 brd->vector_mask = 0x000F;
2526         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2527                 if (regs[12] & bits) {
2528                         brd->ports[i].baud_base = 921600;
2529                         brd->ports[i].max_baud = 921600;
2530                 } else {
2531                         brd->ports[i].baud_base = 115200;
2532                         brd->ports[i].max_baud = 115200;
2533                 }
2534         }
2535         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2536         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2537         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2538         outb(scratch2, cap + UART_LCR);
2539         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2540         scratch = inb(cap + UART_IIR);
2541
2542         if (scratch & 0xC0)
2543                 brd->uart_type = PORT_16550A;
2544         else
2545                 brd->uart_type = PORT_16450;
2546         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2547                         "mxser(IO)"))
2548                 return MXSER_ERR_IOADDR;
2549         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2550                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2551                 return MXSER_ERR_VECTOR;
2552         }
2553         return brd->info->nports;
2554 }
2555
2556 static int __devinit mxser_probe(struct pci_dev *pdev,
2557                 const struct pci_device_id *ent)
2558 {
2559 #ifdef CONFIG_PCI
2560         struct mxser_board *brd;
2561         unsigned int i, j;
2562         unsigned long ioaddress;
2563         int retval = -EINVAL;
2564
2565         for (i = 0; i < MXSER_BOARDS; i++)
2566                 if (mxser_boards[i].info == NULL)
2567                         break;
2568
2569         if (i >= MXSER_BOARDS) {
2570                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2571                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2572                 goto err;
2573         }
2574
2575         brd = &mxser_boards[i];
2576         brd->idx = i * MXSER_PORTS_PER_BOARD;
2577         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2578                 mxser_cards[ent->driver_data].name,
2579                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2580
2581         retval = pci_enable_device(pdev);
2582         if (retval) {
2583                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2584                 goto err;
2585         }
2586
2587         /* io address */
2588         ioaddress = pci_resource_start(pdev, 2);
2589         retval = pci_request_region(pdev, 2, "mxser(IO)");
2590         if (retval)
2591                 goto err;
2592
2593         brd->info = &mxser_cards[ent->driver_data];
2594         for (i = 0; i < brd->info->nports; i++)
2595                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2596
2597         /* vector */
2598         ioaddress = pci_resource_start(pdev, 3);
2599         retval = pci_request_region(pdev, 3, "mxser(vector)");
2600         if (retval)
2601                 goto err_relio;
2602         brd->vector = ioaddress;
2603
2604         /* irq */
2605         brd->irq = pdev->irq;
2606
2607         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2608         brd->uart_type = PORT_16550A;
2609         brd->vector_mask = 0;
2610
2611         for (i = 0; i < brd->info->nports; i++) {
2612                 for (j = 0; j < UART_INFO_NUM; j++) {
2613                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2614                                 brd->ports[i].max_baud =
2615                                         Gpci_uart_info[j].max_baud;
2616
2617                                 /* exception....CP-102 */
2618                                 if (brd->info->flags & MXSER_HIGHBAUD)
2619                                         brd->ports[i].max_baud = 921600;
2620                                 break;
2621                         }
2622                 }
2623         }
2624
2625         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2626                 for (i = 0; i < brd->info->nports; i++) {
2627                         if (i < 4)
2628                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2629                         else
2630                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2631                 }
2632                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2633                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2634         }
2635
2636         for (i = 0; i < brd->info->nports; i++) {
2637                 brd->vector_mask |= (1 << i);
2638                 brd->ports[i].baud_base = 921600;
2639         }
2640
2641         /* mxser_initbrd will hook ISR. */
2642         retval = mxser_initbrd(brd, pdev);
2643         if (retval)
2644                 goto err_null;
2645
2646         for (i = 0; i < brd->info->nports; i++)
2647                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2648
2649         pci_set_drvdata(pdev, brd);
2650
2651         return 0;
2652 err_relio:
2653         pci_release_region(pdev, 2);
2654 err_null:
2655         brd->info = NULL;
2656 err:
2657         return retval;
2658 #else
2659         return -ENODEV;
2660 #endif
2661 }
2662
2663 static void __devexit mxser_remove(struct pci_dev *pdev)
2664 {
2665         struct mxser_board *brd = pci_get_drvdata(pdev);
2666         unsigned int i;
2667
2668         for (i = 0; i < brd->info->nports; i++)
2669                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2670
2671         mxser_release_res(brd, pdev, 1);
2672         brd->info = NULL;
2673 }
2674
2675 static struct pci_driver mxser_driver = {
2676         .name = "mxser",
2677         .id_table = mxser_pcibrds,
2678         .probe = mxser_probe,
2679         .remove = __devexit_p(mxser_remove)
2680 };
2681
2682 static int __init mxser_module_init(void)
2683 {
2684         struct mxser_board *brd;
2685         unsigned long cap;
2686         unsigned int i, m, isaloop;
2687         int retval, b;
2688
2689         pr_debug("Loading module mxser ...\n");
2690
2691         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2692         if (!mxvar_sdriver)
2693                 return -ENOMEM;
2694
2695         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2696                 MXSER_VERSION);
2697
2698         /* Initialize the tty_driver structure */
2699         mxvar_sdriver->owner = THIS_MODULE;
2700         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2701         mxvar_sdriver->name = "ttyMI";
2702         mxvar_sdriver->major = ttymajor;
2703         mxvar_sdriver->minor_start = 0;
2704         mxvar_sdriver->num = MXSER_PORTS + 1;
2705         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2706         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2707         mxvar_sdriver->init_termios = tty_std_termios;
2708         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2709         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2710         tty_set_operations(mxvar_sdriver, &mxser_ops);
2711
2712         retval = tty_register_driver(mxvar_sdriver);
2713         if (retval) {
2714                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2715                                 "tty driver !\n");
2716                 goto err_put;
2717         }
2718
2719         mxvar_diagflag = 0;
2720
2721         m = 0;
2722         /* Start finding ISA boards here */
2723         for (isaloop = 0; isaloop < 2; isaloop++)
2724                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2725                         if (!isaloop)
2726                                 cap = mxserBoardCAP[b]; /* predefined */
2727                         else
2728                                 cap = ioaddr[b]; /* module param */
2729
2730                         if (!cap)
2731                                 continue;
2732
2733                         brd = &mxser_boards[m];
2734                         retval = mxser_get_ISA_conf(cap, brd);
2735
2736                         if (retval != 0)
2737                                 printk(KERN_INFO "Found MOXA %s board "
2738                                         "(CAP=0x%x)\n",
2739                                         brd->info->name, ioaddr[b]);
2740
2741                         if (retval <= 0) {
2742                                 if (retval == MXSER_ERR_IRQ)
2743                                         printk(KERN_ERR "Invalid interrupt "
2744                                                 "number, board not "
2745                                                 "configured\n");
2746                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2747                                         printk(KERN_ERR "Invalid interrupt "
2748                                                 "number, board not "
2749                                                 "configured\n");
2750                                 else if (retval == MXSER_ERR_VECTOR)
2751                                         printk(KERN_ERR "Invalid interrupt "
2752                                                 "vector, board not "
2753                                                 "configured\n");
2754                                 else if (retval == MXSER_ERR_IOADDR)
2755                                         printk(KERN_ERR "Invalid I/O address, "
2756                                                 "board not configured\n");
2757
2758                                 brd->info = NULL;
2759                                 continue;
2760                         }
2761
2762                         /* mxser_initbrd will hook ISR. */
2763                         if (mxser_initbrd(brd, NULL) < 0) {
2764                                 brd->info = NULL;
2765                                 continue;
2766                         }
2767
2768                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2769                         for (i = 0; i < brd->info->nports; i++)
2770                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2771                                                 NULL);
2772
2773                         m++;
2774                 }
2775
2776         retval = pci_register_driver(&mxser_driver);
2777         if (retval) {
2778                 printk(KERN_ERR "Can't register pci driver\n");
2779                 if (!m) {
2780                         retval = -ENODEV;
2781                         goto err_unr;
2782                 } /* else: we have some ISA cards under control */
2783         }
2784
2785         pr_debug("Done.\n");
2786
2787         return 0;
2788 err_unr:
2789         tty_unregister_driver(mxvar_sdriver);
2790 err_put:
2791         put_tty_driver(mxvar_sdriver);
2792         return retval;
2793 }
2794
2795 static void __exit mxser_module_exit(void)
2796 {
2797         unsigned int i, j;
2798
2799         pr_debug("Unloading module mxser ...\n");
2800
2801         pci_unregister_driver(&mxser_driver);
2802
2803         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2804                 if (mxser_boards[i].info != NULL)
2805                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2806                                 tty_unregister_device(mxvar_sdriver,
2807                                                 mxser_boards[i].idx + j);
2808         tty_unregister_driver(mxvar_sdriver);
2809         put_tty_driver(mxvar_sdriver);
2810
2811         for (i = 0; i < MXSER_BOARDS; i++)
2812                 if (mxser_boards[i].info != NULL)
2813                         mxser_release_res(&mxser_boards[i], NULL, 1);
2814
2815         pr_debug("Done.\n");
2816 }
2817
2818 module_init(mxser_module_init);
2819 module_exit(mxser_module_exit);