drivers/char/mxser_new.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com.tw).
   5  *      Copyright (C) 2006       Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  18  *      - Fixed x86_64 cleanness
  19  *      - Fixed sleep with spinlock held in mxser_send_break
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/autoconf.h>
  24 #include <linux/errno.h>
  25 #include <linux/signal.h>
  26 #include <linux/sched.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serial_reg.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/gfp.h>
  38 #include <linux/ioport.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/delay.h>
  42 #include <linux/pci.h>
  43
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/bitops.h>
  48 #include <asm/uaccess.h>
  49
  50 #include "mxser_new.h"
  51
  52 #define MXSER_VERSION   "2.0.1"         /* 1.9.15 */
  53 #define MXSERMAJOR       174
  54 #define MXSERCUMAJOR     175
  55
  56 #define MXSER_BOARDS            4       /* Max. boards */
  57 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  58 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  59 #define MXSER_ISR_PASS_LIMIT    100
  60
  61 #define MXSER_ERR_IOADDR        -1
  62 #define MXSER_ERR_IRQ           -2
  63 #define MXSER_ERR_IRQ_CONFLIT   -3
  64 #define MXSER_ERR_VECTOR        -4
  65
  66 /*CheckIsMoxaMust return value*/
  67 #define MOXA_OTHER_UART         0x00
  68 #define MOXA_MUST_MU150_HWID    0x01
  69 #define MOXA_MUST_MU860_HWID    0x02
  70
  71 #define WAKEUP_CHARS            256
  72
  73 #define UART_MCR_AFE            0x20
  74 #define UART_LSR_SPECIAL        0x1E
  75
  76 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  77                                           IXON|IXOFF))
  78
  79 #define C168_ASIC_ID    1
  80 #define C104_ASIC_ID    2
  81 #define C102_ASIC_ID    0xB
  82 #define CI132_ASIC_ID   4
  83 #define CI134_ASIC_ID   3
  84 #define CI104J_ASIC_ID  5
  85
  86 #define MXSER_HIGHBAUD  1
  87 #define MXSER_HAS2      2
  88
  89 /* This is only for PCI */
  90 static const struct {
  91         int type;
  92         int tx_fifo;
  93         int rx_fifo;
  94         int xmit_fifo_size;
  95         int rx_high_water;
  96         int rx_trigger;
  97         int rx_low_water;
  98         long max_baud;
  99 } Gpci_uart_info[] = {
 100         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 101         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 102         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 103 };
 104 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 105
 106 struct mxser_cardinfo {
 107         unsigned int nports;
 108         char *name;
 109         unsigned int flags;
 110 };
 111
 112 static const struct mxser_cardinfo mxser_cards[] = {
 113         { 8, "C168 series", },                  /* C168-ISA */
 114         { 4, "C104 series", },                  /* C104-ISA */
 115         { 4, "CI-104J series", },               /* CI104J */
 116         { 8, "C168H/PCI series", },             /* C168-PCI */
 117         { 4, "C104H/PCI series", },             /* C104-PCI */
 118         { 4, "C102 series", MXSER_HAS2 },       /* C102-ISA */
 119         { 4, "CI-132 series", MXSER_HAS2 },     /* CI132 */
 120         { 4, "CI-134 series", },                /* CI134 */
 121         { 2, "CP-132 series", },                /* CP132 */
 122         { 4, "CP-114 series", },                /* CP114 */
 123         { 4, "CT-114 series", },                /* CT114 */
 124         { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
 125         { 4, "CP-104U series", },               /* CP104U */
 126         { 8, "CP-168U series", },               /* CP168U */
 127         { 2, "CP-132U series", },               /* CP132U */
 128         { 4, "CP-134U series", },               /* CP134U */
 129         { 4, "CP-104JU series", },              /* CP104JU */
 130         { 8, "Moxa UC7000 Serial", },           /* RC7000 */
 131         { 8, "CP-118U series", },               /* CP118U */
 132         { 2, "CP-102UL series", },              /* CP102UL */
 133         { 2, "CP-102U series", },               /* CP102U */
 134         { 8, "CP-118EL series", },              /* CP118EL */
 135         { 8, "CP-168EL series", },              /* CP168EL */
 136         { 4, "CP-104EL series", }               /* CP104EL */
 137 };
 138
 139 /* driver_data correspond to the lines in the structure above
 140    see also ISA probe function before you change something */
 141 static struct pci_device_id mxser_pcibrds[] = {
 142         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
 143                 .driver_data = 3 },
 144         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
 145                 .driver_data = 4 },
 146         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
 147                 .driver_data = 8 },
 148         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
 149                 .driver_data = 9 },
 150         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
 151                 .driver_data = 10 },
 152         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
 153                 .driver_data = 11 },
 154         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
 155                 .driver_data = 12 },
 156         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
 157                 .driver_data = 13 },
 158         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
 159                 .driver_data = 14 },
 160         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
 161                 .driver_data = 15 },
 162         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
 163                 .driver_data = 16 },
 164         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
 165                 .driver_data = 17 },
 166         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
 167                 .driver_data = 18 },
 168         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
 169                 .driver_data = 19 },
 170         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
 171                 .driver_data = 20 },
 172         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
 173                 .driver_data = 21 },
 174         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
 175                 .driver_data = 22 },
 176         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
 177                 .driver_data = 23 },
 178         { }
 179 };
 180 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 181
 182 static int mxvar_baud_table[] = {
 183         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
 184         4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
 185 };
 186 static unsigned int mxvar_baud_table1[] = {
 187         0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400,
 188         B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600
 189 };
 190 #define BAUD_TABLE_NO ARRAY_SIZE(mxvar_baud_table)
 191
 192 #define B_SPEC  B2000000
 193
 194 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 195 static int ttymajor = MXSERMAJOR;
 196 static int calloutmajor = MXSERCUMAJOR;
 197
 198 /* Variables for insmod */
 199
 200 MODULE_AUTHOR("Casper Yang");
 201 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 202 module_param_array(ioaddr, int, NULL, 0);
 203 module_param(ttymajor, int, 0);
 204 MODULE_LICENSE("GPL");
 205
 206 struct mxser_log {
 207         int tick;
 208         unsigned long rxcnt[MXSER_PORTS];
 209         unsigned long txcnt[MXSER_PORTS];
 210 };
 211
 212
 213 struct mxser_mon {
 214         unsigned long rxcnt;
 215         unsigned long txcnt;
 216         unsigned long up_rxcnt;
 217         unsigned long up_txcnt;
 218         int modem_status;
 219         unsigned char hold_reason;
 220 };
 221
 222 struct mxser_mon_ext {
 223         unsigned long rx_cnt[32];
 224         unsigned long tx_cnt[32];
 225         unsigned long up_rxcnt[32];
 226         unsigned long up_txcnt[32];
 227         int modem_status[32];
 228
 229         long baudrate[32];
 230         int databits[32];
 231         int stopbits[32];
 232         int parity[32];
 233         int flowctrl[32];
 234         int fifo[32];
 235         int iftype[32];
 236 };
 237
 238 struct mxser_board;
 239
 240 struct mxser_port {
 241         struct mxser_board *board;
 242         struct tty_struct *tty;
 243
 244         unsigned long ioaddr;
 245         unsigned long opmode_ioaddr;
 246         int max_baud;
 247
 248         int rx_high_water;
 249         int rx_trigger;         /* Rx fifo trigger level */
 250         int rx_low_water;
 251         int baud_base;          /* max. speed */
 252         long realbaud;
 253         int type;               /* UART type */
 254         int flags;              /* defined in tty.h */
 255         int speed;
 256
 257         int x_char;             /* xon/xoff character */
 258         int IER;                /* Interrupt Enable Register */
 259         int MCR;                /* Modem control register */
 260
 261         unsigned char stop_rx;
 262         unsigned char ldisc_stop_rx;
 263
 264         int custom_divisor;
 265         int close_delay;
 266         unsigned short closing_wait;
 267         unsigned char err_shadow;
 268         unsigned long event;
 269
 270         int count;              /* # of fd on device */
 271         int blocked_open;       /* # of blocked opens */
 272         struct async_icount icount; /* kernel counters for 4 input interrupts */
 273         int timeout;
 274
 275         int read_status_mask;
 276         int ignore_status_mask;
 277         int xmit_fifo_size;
 278         unsigned char *xmit_buf;
 279         int xmit_head;
 280         int xmit_tail;
 281         int xmit_cnt;
 282
 283         struct ktermios normal_termios;
 284
 285         struct mxser_mon mon_data;
 286
 287         spinlock_t slock;
 288         wait_queue_head_t open_wait;
 289         wait_queue_head_t delta_msr_wait;
 290 };
 291
 292 struct mxser_board {
 293         unsigned int idx;
 294         int irq;
 295         const struct mxser_cardinfo *info;
 296         unsigned long vector;
 297         unsigned long vector_mask;
 298
 299         int chip_flag;
 300         int uart_type;
 301
 302         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 303 };
 304
 305 struct mxser_mstatus {
 306         tcflag_t cflag;
 307         int cts;
 308         int dsr;
 309         int ri;
 310         int dcd;
 311 };
 312
 313 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 314
 315 static int mxserBoardCAP[MXSER_BOARDS] = {
 316         0, 0, 0, 0
 317         /*  0x180, 0x280, 0x200, 0x320 */
 318 };
 319
 320 static struct mxser_board mxser_boards[MXSER_BOARDS];
 321 static struct tty_driver *mxvar_sdriver;
 322 static struct mxser_log mxvar_log;
 323 static int mxvar_diagflag;
 324 static unsigned char mxser_msr[MXSER_PORTS + 1];
 325 static struct mxser_mon_ext mon_data_ext;
 326 static int mxser_set_baud_method[MXSER_PORTS + 1];
 327
 328 #ifdef CONFIG_PCI
 329 static int __devinit CheckIsMoxaMust(int io)
 330 {
 331         u8 oldmcr, hwid;
 332         int i;
 333
 334         outb(0, io + UART_LCR);
 335         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 336         oldmcr = inb(io + UART_MCR);
 337         outb(0, io + UART_MCR);
 338         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 339         if ((hwid = inb(io + UART_MCR)) != 0) {
 340                 outb(oldmcr, io + UART_MCR);
 341                 return MOXA_OTHER_UART;
 342         }
 343
 344         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 345         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 346                 if (hwid == Gpci_uart_info[i].type)
 347                         return (int)hwid;
 348         }
 349         return MOXA_OTHER_UART;
 350 }
 351 #endif
 352
 353 static void process_txrx_fifo(struct mxser_port *info)
 354 {
 355         int i;
 356
 357         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 358                 info->rx_trigger = 1;
 359                 info->rx_high_water = 1;
 360                 info->rx_low_water = 1;
 361                 info->xmit_fifo_size = 1;
 362         } else
 363                 for (i = 0; i < UART_INFO_NUM; i++)
 364                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 365                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 366                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 367                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 368                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 369                                 break;
 370                         }
 371 }
 372
 373 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 374 {
 375         unsigned char status = 0;
 376
 377         status = inb(baseaddr + UART_MSR);
 378
 379         mxser_msr[port] &= 0x0F;
 380         mxser_msr[port] |= status;
 381         status = mxser_msr[port];
 382         if (mode)
 383                 mxser_msr[port] = 0;
 384
 385         return status;
 386 }
 387
 388 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 389                 struct mxser_port *port)
 390 {
 391         DECLARE_WAITQUEUE(wait, current);
 392         int retval;
 393         int do_clocal = 0;
 394         unsigned long flags;
 395
 396         /*
 397          * If non-blocking mode is set, or the port is not enabled,
 398          * then make the check up front and then exit.
 399          */
 400         if ((filp->f_flags & O_NONBLOCK) ||
 401                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 402                 port->flags |= ASYNC_NORMAL_ACTIVE;
 403                 return 0;
 404         }
 405
 406         if (tty->termios->c_cflag & CLOCAL)
 407                 do_clocal = 1;
 408
 409         /*
 410          * Block waiting for the carrier detect and the line to become
 411          * free (i.e., not in use by the callout).  While we are in
 412          * this loop, port->count is dropped by one, so that
 413          * mxser_close() knows when to free things.  We restore it upon
 414          * exit, either normal or abnormal.
 415          */
 416         retval = 0;
 417         add_wait_queue(&port->open_wait, &wait);
 418
 419         spin_lock_irqsave(&port->slock, flags);
 420         if (!tty_hung_up_p(filp))
 421                 port->count--;
 422         spin_unlock_irqrestore(&port->slock, flags);
 423         port->blocked_open++;
 424         while (1) {
 425                 spin_lock_irqsave(&port->slock, flags);
 426                 outb(inb(port->ioaddr + UART_MCR) |
 427                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 428                 spin_unlock_irqrestore(&port->slock, flags);
 429                 set_current_state(TASK_INTERRUPTIBLE);
 430                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 431                         if (port->flags & ASYNC_HUP_NOTIFY)
 432                                 retval = -EAGAIN;
 433                         else
 434                                 retval = -ERESTARTSYS;
 435                         break;
 436                 }
 437                 if (!(port->flags & ASYNC_CLOSING) &&
 438                                 (do_clocal ||
 439                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 440                         break;
 441                 if (signal_pending(current)) {
 442                         retval = -ERESTARTSYS;
 443                         break;
 444                 }
 445                 schedule();
 446         }
 447         set_current_state(TASK_RUNNING);
 448         remove_wait_queue(&port->open_wait, &wait);
 449         if (!tty_hung_up_p(filp))
 450                 port->count++;
 451         port->blocked_open--;
 452         if (retval)
 453                 return retval;
 454         port->flags |= ASYNC_NORMAL_ACTIVE;
 455         return 0;
 456 }
 457
 458 static int mxser_set_baud(struct mxser_port *info, long newspd)
 459 {
 460         unsigned int i;
 461         int quot = 0;
 462         unsigned char cval;
 463         int ret = 0;
 464
 465         if (!info->tty || !info->tty->termios)
 466                 return ret;
 467
 468         if (!(info->ioaddr))
 469                 return ret;
 470
 471         if (newspd > info->max_baud)
 472                 return 0;
 473
 474         info->realbaud = newspd;
 475         for (i = 0; i < BAUD_TABLE_NO; i++)
 476                if (newspd == mxvar_baud_table[i])
 477                        break;
 478         if (i == BAUD_TABLE_NO) {
 479                 quot = info->baud_base / info->speed;
 480                 if (info->speed <= 0 || info->speed > info->max_baud)
 481                         quot = 0;
 482         } else {
 483                 if (newspd == 134) {
 484                         quot = (2 * info->baud_base / 269);
 485                 } else if (newspd) {
 486                         quot = info->baud_base / newspd;
 487                         if (quot == 0)
 488                                 quot = 1;
 489                 } else {
 490                         quot = 0;
 491                 }
 492         }
 493
 494         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 495         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 496
 497         if (quot) {
 498                 info->MCR |= UART_MCR_DTR;
 499                 outb(info->MCR, info->ioaddr + UART_MCR);
 500         } else {
 501                 info->MCR &= ~UART_MCR_DTR;
 502                 outb(info->MCR, info->ioaddr + UART_MCR);
 503                 return ret;
 504         }
 505
 506         cval = inb(info->ioaddr + UART_LCR);
 507
 508         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 509
 510         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 511         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 512         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 513
 514         if (i == BAUD_TABLE_NO) {
 515                 quot = info->baud_base % info->speed;
 516                 quot *= 8;
 517                 if ((quot % info->speed) > (info->speed / 2)) {
 518                         quot /= info->speed;
 519                         quot++;
 520                 } else {
 521                         quot /= info->speed;
 522                 }
 523                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 524         } else
 525                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 526
 527         return ret;
 528 }
 529
 530 /*
 531  * This routine is called to set the UART divisor registers to match
 532  * the specified baud rate for a serial port.
 533  */
 534 static int mxser_change_speed(struct mxser_port *info,
 535                 struct ktermios *old_termios)
 536 {
 537         unsigned cflag, cval, fcr;
 538         int ret = 0;
 539         unsigned char status;
 540         long baud;
 541
 542         if (!info->tty || !info->tty->termios)
 543                 return ret;
 544         cflag = info->tty->termios->c_cflag;
 545         if (!(info->ioaddr))
 546                 return ret;
 547
 548         if (mxser_set_baud_method[info->tty->index] == 0) {
 549                 if ((cflag & CBAUD) == B_SPEC)
 550                         baud = info->speed;
 551                 else
 552                         baud = tty_get_baud_rate(info->tty);
 553                 mxser_set_baud(info, baud);
 554         }
 555
 556         /* byte size and parity */
 557         switch (cflag & CSIZE) {
 558         case CS5:
 559                 cval = 0x00;
 560                 break;
 561         case CS6:
 562                 cval = 0x01;
 563                 break;
 564         case CS7:
 565                 cval = 0x02;
 566                 break;
 567         case CS8:
 568                 cval = 0x03;
 569                 break;
 570         default:
 571                 cval = 0x00;
 572                 break;          /* too keep GCC shut... */
 573         }
 574         if (cflag & CSTOPB)
 575                 cval |= 0x04;
 576         if (cflag & PARENB)
 577                 cval |= UART_LCR_PARITY;
 578         if (!(cflag & PARODD))
 579                 cval |= UART_LCR_EPAR;
 580         if (cflag & CMSPAR)
 581                 cval |= UART_LCR_SPAR;
 582
 583         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 584                 if (info->board->chip_flag) {
 585                         fcr = UART_FCR_ENABLE_FIFO;
 586                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 587                         SET_MOXA_MUST_FIFO_VALUE(info);
 588                 } else
 589                         fcr = 0;
 590         } else {
 591                 fcr = UART_FCR_ENABLE_FIFO;
 592                 if (info->board->chip_flag) {
 593                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 594                         SET_MOXA_MUST_FIFO_VALUE(info);
 595                 } else {
 596                         switch (info->rx_trigger) {
 597                         case 1:
 598                                 fcr |= UART_FCR_TRIGGER_1;
 599                                 break;
 600                         case 4:
 601                                 fcr |= UART_FCR_TRIGGER_4;
 602                                 break;
 603                         case 8:
 604                                 fcr |= UART_FCR_TRIGGER_8;
 605                                 break;
 606                         default:
 607                                 fcr |= UART_FCR_TRIGGER_14;
 608                                 break;
 609                         }
 610                 }
 611         }
 612
 613         /* CTS flow control flag and modem status interrupts */
 614         info->IER &= ~UART_IER_MSI;
 615         info->MCR &= ~UART_MCR_AFE;
 616         if (cflag & CRTSCTS) {
 617                 info->flags |= ASYNC_CTS_FLOW;
 618                 info->IER |= UART_IER_MSI;
 619                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 620                         info->MCR |= UART_MCR_AFE;
 621                 } else {
 622                         status = inb(info->ioaddr + UART_MSR);
 623                         if (info->tty->hw_stopped) {
 624                                 if (status & UART_MSR_CTS) {
 625                                         info->tty->hw_stopped = 0;
 626                                         if (info->type != PORT_16550A &&
 627                                                         !info->board->chip_flag) {
 628                                                 outb(info->IER & ~UART_IER_THRI,
 629                                                         info->ioaddr +
 630                                                         UART_IER);
 631                                                 info->IER |= UART_IER_THRI;
 632                                                 outb(info->IER, info->ioaddr +
 633                                                                 UART_IER);
 634                                         }
 635                                         tty_wakeup(info->tty);
 636                                 }
 637                         } else {
 638                                 if (!(status & UART_MSR_CTS)) {
 639                                         info->tty->hw_stopped = 1;
 640                                         if ((info->type != PORT_16550A) &&
 641                                                         (!info->board->chip_flag)) {
 642                                                 info->IER &= ~UART_IER_THRI;
 643                                                 outb(info->IER, info->ioaddr +
 644                                                                 UART_IER);
 645                                         }
 646                                 }
 647                         }
 648                 }
 649         } else {
 650                 info->flags &= ~ASYNC_CTS_FLOW;
 651         }
 652         outb(info->MCR, info->ioaddr + UART_MCR);
 653         if (cflag & CLOCAL) {
 654                 info->flags &= ~ASYNC_CHECK_CD;
 655         } else {
 656                 info->flags |= ASYNC_CHECK_CD;
 657                 info->IER |= UART_IER_MSI;
 658         }
 659         outb(info->IER, info->ioaddr + UART_IER);
 660
 661         /*
 662          * Set up parity check flag
 663          */
 664         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 665         if (I_INPCK(info->tty))
 666                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 667         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 668                 info->read_status_mask |= UART_LSR_BI;
 669
 670         info->ignore_status_mask = 0;
 671
 672         if (I_IGNBRK(info->tty)) {
 673                 info->ignore_status_mask |= UART_LSR_BI;
 674                 info->read_status_mask |= UART_LSR_BI;
 675                 /*
 676                  * If we're ignore parity and break indicators, ignore
 677                  * overruns too.  (For real raw support).
 678                  */
 679                 if (I_IGNPAR(info->tty)) {
 680                         info->ignore_status_mask |=
 681                                                 UART_LSR_OE |
 682                                                 UART_LSR_PE |
 683                                                 UART_LSR_FE;
 684                         info->read_status_mask |=
 685                                                 UART_LSR_OE |
 686                                                 UART_LSR_PE |
 687                                                 UART_LSR_FE;
 688                 }
 689         }
 690         if (info->board->chip_flag) {
 691                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 692                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 693                 if (I_IXON(info->tty)) {
 694                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 695                 } else {
 696                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 697                 }
 698                 if (I_IXOFF(info->tty)) {
 699                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 700                 } else {
 701                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 702                 }
 703         }
 704
 705
 706         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 707         outb(cval, info->ioaddr + UART_LCR);
 708
 709         return ret;
 710 }
 711
 712 static void mxser_check_modem_status(struct mxser_port *port, int status)
 713 {
 714         /* update input line counters */
 715         if (status & UART_MSR_TERI)
 716                 port->icount.rng++;
 717         if (status & UART_MSR_DDSR)
 718                 port->icount.dsr++;
 719         if (status & UART_MSR_DDCD)
 720                 port->icount.dcd++;
 721         if (status & UART_MSR_DCTS)
 722                 port->icount.cts++;
 723         port->mon_data.modem_status = status;
 724         wake_up_interruptible(&port->delta_msr_wait);
 725
 726         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 727                 if (status & UART_MSR_DCD)
 728                         wake_up_interruptible(&port->open_wait);
 729         }
 730
 731         if (port->flags & ASYNC_CTS_FLOW) {
 732                 if (port->tty->hw_stopped) {
 733                         if (status & UART_MSR_CTS) {
 734                                 port->tty->hw_stopped = 0;
 735
 736                                 if ((port->type != PORT_16550A) &&
 737                                                 (!port->board->chip_flag)) {
 738                                         outb(port->IER & ~UART_IER_THRI,
 739                                                 port->ioaddr + UART_IER);
 740                                         port->IER |= UART_IER_THRI;
 741                                         outb(port->IER, port->ioaddr +
 742                                                         UART_IER);
 743                                 }
 744                                 tty_wakeup(port->tty);
 745                         }
 746                 } else {
 747                         if (!(status & UART_MSR_CTS)) {
 748                                 port->tty->hw_stopped = 1;
 749                                 if (port->type != PORT_16550A &&
 750                                                 !port->board->chip_flag) {
 751                                         port->IER &= ~UART_IER_THRI;
 752                                         outb(port->IER, port->ioaddr +
 753                                                         UART_IER);
 754                                 }
 755                         }
 756                 }
 757         }
 758 }
 759
 760 static int mxser_startup(struct mxser_port *info)
 761 {
 762         unsigned long page;
 763         unsigned long flags;
 764
 765         page = __get_free_page(GFP_KERNEL);
 766         if (!page)
 767                 return -ENOMEM;
 768
 769         spin_lock_irqsave(&info->slock, flags);
 770
 771         if (info->flags & ASYNC_INITIALIZED) {
 772                 free_page(page);
 773                 spin_unlock_irqrestore(&info->slock, flags);
 774                 return 0;
 775         }
 776
 777         if (!info->ioaddr || !info->type) {
 778                 if (info->tty)
 779                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 780                 free_page(page);
 781                 spin_unlock_irqrestore(&info->slock, flags);
 782                 return 0;
 783         }
 784         if (info->xmit_buf)
 785                 free_page(page);
 786         else
 787                 info->xmit_buf = (unsigned char *) page;
 788
 789         /*
 790          * Clear the FIFO buffers and disable them
 791          * (they will be reenabled in mxser_change_speed())
 792          */
 793         if (info->board->chip_flag)
 794                 outb((UART_FCR_CLEAR_RCVR |
 795                         UART_FCR_CLEAR_XMIT |
 796                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 797         else
 798                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 799                         info->ioaddr + UART_FCR);
 800
 801         /*
 802          * At this point there's no way the LSR could still be 0xFF;
 803          * if it is, then bail out, because there's likely no UART
 804          * here.
 805          */
 806         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 807                 spin_unlock_irqrestore(&info->slock, flags);
 808                 if (capable(CAP_SYS_ADMIN)) {
 809                         if (info->tty)
 810                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 811                         return 0;
 812                 } else
 813                         return -ENODEV;
 814         }
 815
 816         /*
 817          * Clear the interrupt registers.
 818          */
 819         (void) inb(info->ioaddr + UART_LSR);
 820         (void) inb(info->ioaddr + UART_RX);
 821         (void) inb(info->ioaddr + UART_IIR);
 822         (void) inb(info->ioaddr + UART_MSR);
 823
 824         /*
 825          * Now, initialize the UART
 826          */
 827         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 828         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 829         outb(info->MCR, info->ioaddr + UART_MCR);
 830
 831         /*
 832          * Finally, enable interrupts
 833          */
 834         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 835
 836         if (info->board->chip_flag)
 837                 info->IER |= MOXA_MUST_IER_EGDAI;
 838         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 839
 840         /*
 841          * And clear the interrupt registers again for luck.
 842          */
 843         (void) inb(info->ioaddr + UART_LSR);
 844         (void) inb(info->ioaddr + UART_RX);
 845         (void) inb(info->ioaddr + UART_IIR);
 846         (void) inb(info->ioaddr + UART_MSR);
 847
 848         if (info->tty)
 849                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 850         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 851
 852         /*
 853          * and set the speed of the serial port
 854          */
 855         mxser_change_speed(info, NULL);
 856         info->flags |= ASYNC_INITIALIZED;
 857         spin_unlock_irqrestore(&info->slock, flags);
 858
 859         return 0;
 860 }
 861
 862 /*
 863  * This routine will shutdown a serial port; interrupts maybe disabled, and
 864  * DTR is dropped if the hangup on close termio flag is on.
 865  */
 866 static void mxser_shutdown(struct mxser_port *info)
 867 {
 868         unsigned long flags;
 869
 870         if (!(info->flags & ASYNC_INITIALIZED))
 871                 return;
 872
 873         spin_lock_irqsave(&info->slock, flags);
 874
 875         /*
 876          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 877          * here so the queue might never be waken up
 878          */
 879         wake_up_interruptible(&info->delta_msr_wait);
 880
 881         /*
 882          * Free the IRQ, if necessary
 883          */
 884         if (info->xmit_buf) {
 885                 free_page((unsigned long) info->xmit_buf);
 886                 info->xmit_buf = NULL;
 887         }
 888
 889         info->IER = 0;
 890         outb(0x00, info->ioaddr + UART_IER);
 891
 892         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 893                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 894         outb(info->MCR, info->ioaddr + UART_MCR);
 895
 896         /* clear Rx/Tx FIFO's */
 897         if (info->board->chip_flag)
 898                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 899                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 900                                 info->ioaddr + UART_FCR);
 901         else
 902                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 903                         info->ioaddr + UART_FCR);
 904
 905         /* read data port to reset things */
 906         (void) inb(info->ioaddr + UART_RX);
 907
 908         if (info->tty)
 909                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 910
 911         info->flags &= ~ASYNC_INITIALIZED;
 912
 913         if (info->board->chip_flag)
 914                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 915
 916         spin_unlock_irqrestore(&info->slock, flags);
 917 }
 918
 919 /*
 920  * This routine is called whenever a serial port is opened.  It
 921  * enables interrupts for a serial port, linking in its async structure into
 922  * the IRQ chain.   It also performs the serial-specific
 923  * initialization for the tty structure.
 924  */
 925 static int mxser_open(struct tty_struct *tty, struct file *filp)
 926 {
 927         struct mxser_port *info;
 928         unsigned long flags;
 929         int retval, line;
 930
 931         line = tty->index;
 932         if (line == MXSER_PORTS)
 933                 return 0;
 934         if (line < 0 || line > MXSER_PORTS)
 935                 return -ENODEV;
 936         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 937         if (!info->ioaddr)
 938                 return -ENODEV;
 939
 940         tty->driver_data = info;
 941         info->tty = tty;
 942         /*
 943          * Start up serial port
 944          */
 945         spin_lock_irqsave(&info->slock, flags);
 946         info->count++;
 947         spin_unlock_irqrestore(&info->slock, flags);
 948         retval = mxser_startup(info);
 949         if (retval)
 950                 return retval;
 951
 952         retval = mxser_block_til_ready(tty, filp, info);
 953         if (retval)
 954                 return retval;
 955
 956         /* unmark here for very high baud rate (ex. 921600 bps) used */
 957         tty->low_latency = 1;
 958         return 0;
 959 }
 960
 961 /*
 962  * This routine is called when the serial port gets closed.  First, we
 963  * wait for the last remaining data to be sent.  Then, we unlink its
 964  * async structure from the interrupt chain if necessary, and we free
 965  * that IRQ if nothing is left in the chain.
 966  */
 967 static void mxser_close(struct tty_struct *tty, struct file *filp)
 968 {
 969         struct mxser_port *info = tty->driver_data;
 970
 971         unsigned long timeout;
 972         unsigned long flags;
 973
 974         if (tty->index == MXSER_PORTS)
 975                 return;
 976         if (!info)
 977                 return;
 978
 979         spin_lock_irqsave(&info->slock, flags);
 980
 981         if (tty_hung_up_p(filp)) {
 982                 spin_unlock_irqrestore(&info->slock, flags);
 983                 return;
 984         }
 985         if ((tty->count == 1) && (info->count != 1)) {
 986                 /*
 987                  * Uh, oh.  tty->count is 1, which means that the tty
 988                  * structure will be freed.  Info->count should always
 989                  * be one in these conditions.  If it's greater than
 990                  * one, we've got real problems, since it means the
 991                  * serial port won't be shutdown.
 992                  */
 993                 printk(KERN_ERR "mxser_close: bad serial port count; "
 994                         "tty->count is 1, info->count is %d\n", info->count);
 995                 info->count = 1;
 996         }
 997         if (--info->count < 0) {
 998                 printk(KERN_ERR "mxser_close: bad serial port count for "
 999                         "ttys%d: %d\n", tty->index, info->count);
1000                 info->count = 0;
1001         }
1002         if (info->count) {
1003                 spin_unlock_irqrestore(&info->slock, flags);
1004                 return;
1005         }
1006         info->flags |= ASYNC_CLOSING;
1007         spin_unlock_irqrestore(&info->slock, flags);
1008         /*
1009          * Save the termios structure, since this port may have
1010          * separate termios for callout and dialin.
1011          */
1012         if (info->flags & ASYNC_NORMAL_ACTIVE)
1013                 info->normal_termios = *tty->termios;
1014         /*
1015          * Now we wait for the transmit buffer to clear; and we notify
1016          * the line discipline to only process XON/XOFF characters.
1017          */
1018         tty->closing = 1;
1019         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1020                 tty_wait_until_sent(tty, info->closing_wait);
1021         /*
1022          * At this point we stop accepting input.  To do this, we
1023          * disable the receive line status interrupts, and tell the
1024          * interrupt driver to stop checking the data ready bit in the
1025          * line status register.
1026          */
1027         info->IER &= ~UART_IER_RLSI;
1028         if (info->board->chip_flag)
1029                 info->IER &= ~MOXA_MUST_RECV_ISR;
1030
1031         if (info->flags & ASYNC_INITIALIZED) {
1032                 outb(info->IER, info->ioaddr + UART_IER);
1033                 /*
1034                  * Before we drop DTR, make sure the UART transmitter
1035                  * has completely drained; this is especially
1036                  * important if there is a transmit FIFO!
1037                  */
1038                 timeout = jiffies + HZ;
1039                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1040                         schedule_timeout_interruptible(5);
1041                         if (time_after(jiffies, timeout))
1042                                 break;
1043                 }
1044         }
1045         mxser_shutdown(info);
1046
1047         if (tty->driver->flush_buffer)
1048                 tty->driver->flush_buffer(tty);
1049
1050         tty_ldisc_flush(tty);
1051
1052         tty->closing = 0;
1053         info->event = 0;
1054         info->tty = NULL;
1055         if (info->blocked_open) {
1056                 if (info->close_delay)
1057                         schedule_timeout_interruptible(info->close_delay);
1058                 wake_up_interruptible(&info->open_wait);
1059         }
1060
1061         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1062 }
1063
1064 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1065 {
1066         int c, total = 0;
1067         struct mxser_port *info = tty->driver_data;
1068         unsigned long flags;
1069
1070         if (!info->xmit_buf)
1071                 return 0;
1072
1073         while (1) {
1074                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1075                                           SERIAL_XMIT_SIZE - info->xmit_head));
1076                 if (c <= 0)
1077                         break;
1078
1079                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1080                 spin_lock_irqsave(&info->slock, flags);
1081                 info->xmit_head = (info->xmit_head + c) &
1082                                   (SERIAL_XMIT_SIZE - 1);
1083                 info->xmit_cnt += c;
1084                 spin_unlock_irqrestore(&info->slock, flags);
1085
1086                 buf += c;
1087                 count -= c;
1088                 total += c;
1089         }
1090
1091         if (info->xmit_cnt && !tty->stopped) {
1092                 if (!tty->hw_stopped ||
1093                                 (info->type == PORT_16550A) ||
1094                                 (info->board->chip_flag)) {
1095                         spin_lock_irqsave(&info->slock, flags);
1096                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1097                                         UART_IER);
1098                         info->IER |= UART_IER_THRI;
1099                         outb(info->IER, info->ioaddr + UART_IER);
1100                         spin_unlock_irqrestore(&info->slock, flags);
1101                 }
1102         }
1103         return total;
1104 }
1105
1106 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1107 {
1108         struct mxser_port *info = tty->driver_data;
1109         unsigned long flags;
1110
1111         if (!info->xmit_buf)
1112                 return;
1113
1114         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1115                 return;
1116
1117         spin_lock_irqsave(&info->slock, flags);
1118         info->xmit_buf[info->xmit_head++] = ch;
1119         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1120         info->xmit_cnt++;
1121         spin_unlock_irqrestore(&info->slock, flags);
1122         if (!tty->stopped) {
1123                 if (!tty->hw_stopped ||
1124                                 (info->type == PORT_16550A) ||
1125                                 info->board->chip_flag) {
1126                         spin_lock_irqsave(&info->slock, flags);
1127                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1128                         info->IER |= UART_IER_THRI;
1129                         outb(info->IER, info->ioaddr + UART_IER);
1130                         spin_unlock_irqrestore(&info->slock, flags);
1131                 }
1132         }
1133 }
1134
1135
1136 static void mxser_flush_chars(struct tty_struct *tty)
1137 {
1138         struct mxser_port *info = tty->driver_data;
1139         unsigned long flags;
1140
1141         if (info->xmit_cnt <= 0 ||
1142                         tty->stopped ||
1143                         !info->xmit_buf ||
1144                         (tty->hw_stopped &&
1145                          (info->type != PORT_16550A) &&
1146                          (!info->board->chip_flag)
1147                         ))
1148                 return;
1149
1150         spin_lock_irqsave(&info->slock, flags);
1151
1152         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1153         info->IER |= UART_IER_THRI;
1154         outb(info->IER, info->ioaddr + UART_IER);
1155
1156         spin_unlock_irqrestore(&info->slock, flags);
1157 }
1158
1159 static int mxser_write_room(struct tty_struct *tty)
1160 {
1161         struct mxser_port *info = tty->driver_data;
1162         int ret;
1163
1164         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1165         if (ret < 0)
1166                 ret = 0;
1167         return ret;
1168 }
1169
1170 static int mxser_chars_in_buffer(struct tty_struct *tty)
1171 {
1172         struct mxser_port *info = tty->driver_data;
1173         return info->xmit_cnt;
1174 }
1175
1176 static void mxser_flush_buffer(struct tty_struct *tty)
1177 {
1178         struct mxser_port *info = tty->driver_data;
1179         char fcr;
1180         unsigned long flags;
1181
1182
1183         spin_lock_irqsave(&info->slock, flags);
1184         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1185
1186         fcr = inb(info->ioaddr + UART_FCR);
1187         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1188                 info->ioaddr + UART_FCR);
1189         outb(fcr, info->ioaddr + UART_FCR);
1190
1191         spin_unlock_irqrestore(&info->slock, flags);
1192
1193         tty_wakeup(tty);
1194 }
1195
1196 /*
1197  * ------------------------------------------------------------
1198  * friends of mxser_ioctl()
1199  * ------------------------------------------------------------
1200  */
1201 static int mxser_get_serial_info(struct mxser_port *info,
1202                 struct serial_struct __user *retinfo)
1203 {
1204         struct serial_struct tmp;
1205
1206         if (!retinfo)
1207                 return -EFAULT;
1208         memset(&tmp, 0, sizeof(tmp));
1209         tmp.type = info->type;
1210         tmp.line = info->tty->index;
1211         tmp.port = info->ioaddr;
1212         tmp.irq = info->board->irq;
1213         tmp.flags = info->flags;
1214         tmp.baud_base = info->baud_base;
1215         tmp.close_delay = info->close_delay;
1216         tmp.closing_wait = info->closing_wait;
1217         tmp.custom_divisor = info->custom_divisor;
1218         tmp.hub6 = 0;
1219         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1220                 return -EFAULT;
1221         return 0;
1222 }
1223
1224 static int mxser_set_serial_info(struct mxser_port *info,
1225                 struct serial_struct __user *new_info)
1226 {
1227         struct serial_struct new_serial;
1228         unsigned long sl_flags;
1229         unsigned int flags;
1230         int retval = 0;
1231
1232         if (!new_info || !info->ioaddr)
1233                 return -EFAULT;
1234         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1235                 return -EFAULT;
1236
1237         if ((new_serial.irq != info->board->irq) ||
1238                         (new_serial.port != info->ioaddr) ||
1239                         (new_serial.custom_divisor != info->custom_divisor) ||
1240                         (new_serial.baud_base != info->baud_base))
1241                 return -EPERM;
1242
1243         flags = info->flags & ASYNC_SPD_MASK;
1244
1245         if (!capable(CAP_SYS_ADMIN)) {
1246                 if ((new_serial.baud_base != info->baud_base) ||
1247                                 (new_serial.close_delay != info->close_delay) ||
1248                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1249                         return -EPERM;
1250                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1251                                 (new_serial.flags & ASYNC_USR_MASK));
1252         } else {
1253                 /*
1254                  * OK, past this point, all the error checking has been done.
1255                  * At this point, we start making changes.....
1256                  */
1257                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1258                                 (new_serial.flags & ASYNC_FLAGS));
1259                 info->close_delay = new_serial.close_delay * HZ / 100;
1260                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1261                 info->tty->low_latency =
1262                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1263                 info->tty->low_latency = 0;
1264         }
1265
1266         info->type = new_serial.type;
1267
1268         process_txrx_fifo(info);
1269
1270         if (info->flags & ASYNC_INITIALIZED) {
1271                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1272                         spin_lock_irqsave(&info->slock, sl_flags);
1273                         mxser_change_speed(info, NULL);
1274                         spin_unlock_irqrestore(&info->slock, sl_flags);
1275                 }
1276         } else
1277                 retval = mxser_startup(info);
1278
1279         return retval;
1280 }
1281
1282 /*
1283  * mxser_get_lsr_info - get line status register info
1284  *
1285  * Purpose: Let user call ioctl() to get info when the UART physically
1286  *          is emptied.  On bus types like RS485, the transmitter must
1287  *          release the bus after transmitting. This must be done when
1288  *          the transmit shift register is empty, not be done when the
1289  *          transmit holding register is empty.  This functionality
1290  *          allows an RS485 driver to be written in user space.
1291  */
1292 static int mxser_get_lsr_info(struct mxser_port *info,
1293                 unsigned int __user *value)
1294 {
1295         unsigned char status;
1296         unsigned int result;
1297         unsigned long flags;
1298
1299         spin_lock_irqsave(&info->slock, flags);
1300         status = inb(info->ioaddr + UART_LSR);
1301         spin_unlock_irqrestore(&info->slock, flags);
1302         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1303         return put_user(result, value);
1304 }
1305
1306 /*
1307  * This routine sends a break character out the serial port.
1308  */
1309 static void mxser_send_break(struct mxser_port *info, int duration)
1310 {
1311         unsigned long flags;
1312
1313         if (!info->ioaddr)
1314                 return;
1315         set_current_state(TASK_INTERRUPTIBLE);
1316         spin_lock_irqsave(&info->slock, flags);
1317         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1318                 info->ioaddr + UART_LCR);
1319         spin_unlock_irqrestore(&info->slock, flags);
1320         schedule_timeout(duration);
1321         spin_lock_irqsave(&info->slock, flags);
1322         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1323                 info->ioaddr + UART_LCR);
1324         spin_unlock_irqrestore(&info->slock, flags);
1325 }
1326
1327 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1328 {
1329         struct mxser_port *info = tty->driver_data;
1330         unsigned char control, status;
1331         unsigned long flags;
1332
1333
1334         if (tty->index == MXSER_PORTS)
1335                 return -ENOIOCTLCMD;
1336         if (test_bit(TTY_IO_ERROR, &tty->flags))
1337                 return -EIO;
1338
1339         control = info->MCR;
1340
1341         spin_lock_irqsave(&info->slock, flags);
1342         status = inb(info->ioaddr + UART_MSR);
1343         if (status & UART_MSR_ANY_DELTA)
1344                 mxser_check_modem_status(info, status);
1345         spin_unlock_irqrestore(&info->slock, flags);
1346         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1347                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1348                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1349                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1350                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1351                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1352 }
1353
1354 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1355                 unsigned int set, unsigned int clear)
1356 {
1357         struct mxser_port *info = tty->driver_data;
1358         unsigned long flags;
1359
1360
1361         if (tty->index == MXSER_PORTS)
1362                 return -ENOIOCTLCMD;
1363         if (test_bit(TTY_IO_ERROR, &tty->flags))
1364                 return -EIO;
1365
1366         spin_lock_irqsave(&info->slock, flags);
1367
1368         if (set & TIOCM_RTS)
1369                 info->MCR |= UART_MCR_RTS;
1370         if (set & TIOCM_DTR)
1371                 info->MCR |= UART_MCR_DTR;
1372
1373         if (clear & TIOCM_RTS)
1374                 info->MCR &= ~UART_MCR_RTS;
1375         if (clear & TIOCM_DTR)
1376                 info->MCR &= ~UART_MCR_DTR;
1377
1378         outb(info->MCR, info->ioaddr + UART_MCR);
1379         spin_unlock_irqrestore(&info->slock, flags);
1380         return 0;
1381 }
1382
1383 static int __init mxser_program_mode(int port)
1384 {
1385         int id, i, j, n;
1386
1387         outb(0, port);
1388         outb(0, port);
1389         outb(0, port);
1390         (void)inb(port);
1391         (void)inb(port);
1392         outb(0, port);
1393         (void)inb(port);
1394
1395         id = inb(port + 1) & 0x1F;
1396         if ((id != C168_ASIC_ID) &&
1397                         (id != C104_ASIC_ID) &&
1398                         (id != C102_ASIC_ID) &&
1399                         (id != CI132_ASIC_ID) &&
1400                         (id != CI134_ASIC_ID) &&
1401                         (id != CI104J_ASIC_ID))
1402                 return -1;
1403         for (i = 0, j = 0; i < 4; i++) {
1404                 n = inb(port + 2);
1405                 if (n == 'M') {
1406                         j = 1;
1407                 } else if ((j == 1) && (n == 1)) {
1408                         j = 2;
1409                         break;
1410                 } else
1411                         j = 0;
1412         }
1413         if (j != 2)
1414                 id = -2;
1415         return id;
1416 }
1417
1418 static void __init mxser_normal_mode(int port)
1419 {
1420         int i, n;
1421
1422         outb(0xA5, port + 1);
1423         outb(0x80, port + 3);
1424         outb(12, port + 0);     /* 9600 bps */
1425         outb(0, port + 1);
1426         outb(0x03, port + 3);   /* 8 data bits */
1427         outb(0x13, port + 4);   /* loop back mode */
1428         for (i = 0; i < 16; i++) {
1429                 n = inb(port + 5);
1430                 if ((n & 0x61) == 0x60)
1431                         break;
1432                 if ((n & 1) == 1)
1433                         (void)inb(port);
1434         }
1435         outb(0x00, port + 4);
1436 }
1437
1438 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1439 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1440 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1441 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1442 #define EN_CCMD         0x000   /* Chip's command register     */
1443 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1444 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1445 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1446 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1447 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1448 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1449 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1450 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1451 static int __init mxser_read_register(int port, unsigned short *regs)
1452 {
1453         int i, k, value, id;
1454         unsigned int j;
1455
1456         id = mxser_program_mode(port);
1457         if (id < 0)
1458                 return id;
1459         for (i = 0; i < 14; i++) {
1460                 k = (i & 0x3F) | 0x180;
1461                 for (j = 0x100; j > 0; j >>= 1) {
1462                         outb(CHIP_CS, port);
1463                         if (k & j) {
1464                                 outb(CHIP_CS | CHIP_DO, port);
1465                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1466                         } else {
1467                                 outb(CHIP_CS, port);
1468                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1469                         }
1470                 }
1471                 (void)inb(port);
1472                 value = 0;
1473                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1474                         outb(CHIP_CS, port);
1475                         outb(CHIP_CS | CHIP_SK, port);
1476                         if (inb(port) & CHIP_DI)
1477                                 value |= j;
1478                 }
1479                 regs[i] = value;
1480                 outb(0, port);
1481         }
1482         mxser_normal_mode(port);
1483         return id;
1484 }
1485
1486 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1487 {
1488         struct mxser_port *port;
1489         int result, status;
1490         unsigned int i, j;
1491
1492         switch (cmd) {
1493         case MOXA_GET_CONF:
1494 /*              if (copy_to_user(argp, mxsercfg,
1495                                 sizeof(struct mxser_hwconf) * 4))
1496                         return -EFAULT;
1497                 return 0;*/
1498                 return -ENXIO;
1499         case MOXA_GET_MAJOR:
1500                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1501                         return -EFAULT;
1502                 return 0;
1503
1504         case MOXA_GET_CUMAJOR:
1505                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1506                         return -EFAULT;
1507                 return 0;
1508
1509         case MOXA_CHKPORTENABLE:
1510                 result = 0;
1511
1512                 for (i = 0; i < MXSER_BOARDS; i++)
1513                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1514                                 if (mxser_boards[i].ports[j].ioaddr)
1515                                         result |= (1 << i);
1516
1517                 return put_user(result, (unsigned long __user *)argp);
1518         case MOXA_GETDATACOUNT:
1519                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1520                         return -EFAULT;
1521                 return 0;
1522         case MOXA_GETMSTATUS:
1523                 for (i = 0; i < MXSER_BOARDS; i++)
1524                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1525                                 port = &mxser_boards[i].ports[j];
1526
1527                                 GMStatus[i].ri = 0;
1528                                 if (!port->ioaddr) {
1529                                         GMStatus[i].dcd = 0;
1530                                         GMStatus[i].dsr = 0;
1531                                         GMStatus[i].cts = 0;
1532                                         continue;
1533                                 }
1534
1535                                 if (!port->tty || !port->tty->termios)
1536                                         GMStatus[i].cflag =
1537                                                 port->normal_termios.c_cflag;
1538                                 else
1539                                         GMStatus[i].cflag =
1540                                                 port->tty->termios->c_cflag;
1541
1542                                 status = inb(port->ioaddr + UART_MSR);
1543                                 if (status & 0x80 /*UART_MSR_DCD */ )
1544                                         GMStatus[i].dcd = 1;
1545                                 else
1546                                         GMStatus[i].dcd = 0;
1547
1548                                 if (status & 0x20 /*UART_MSR_DSR */ )
1549                                         GMStatus[i].dsr = 1;
1550                                 else
1551                                         GMStatus[i].dsr = 0;
1552
1553
1554                                 if (status & 0x10 /*UART_MSR_CTS */ )
1555                                         GMStatus[i].cts = 1;
1556                                 else
1557                                         GMStatus[i].cts = 0;
1558                         }
1559                 if (copy_to_user(argp, GMStatus,
1560                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1561                         return -EFAULT;
1562                 return 0;
1563         case MOXA_ASPP_MON_EXT: {
1564                 int status, p, shiftbit;
1565                 unsigned long opmode;
1566                 unsigned cflag, iflag;
1567
1568                 for (i = 0; i < MXSER_BOARDS; i++)
1569                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1570                                 port = &mxser_boards[i].ports[j];
1571                                 if (!port->ioaddr)
1572                                         continue;
1573
1574                                 status = mxser_get_msr(port->ioaddr, 0, i);
1575
1576                                 if (status & UART_MSR_TERI)
1577                                         port->icount.rng++;
1578                                 if (status & UART_MSR_DDSR)
1579                                         port->icount.dsr++;
1580                                 if (status & UART_MSR_DDCD)
1581                                         port->icount.dcd++;
1582                                 if (status & UART_MSR_DCTS)
1583                                         port->icount.cts++;
1584
1585                                 port->mon_data.modem_status = status;
1586                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1587                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1588                                 mon_data_ext.up_rxcnt[i] =
1589                                         port->mon_data.up_rxcnt;
1590                                 mon_data_ext.up_txcnt[i] =
1591                                         port->mon_data.up_txcnt;
1592                                 mon_data_ext.modem_status[i] =
1593                                         port->mon_data.modem_status;
1594                                 mon_data_ext.baudrate[i] = port->realbaud;
1595
1596                                 if (!port->tty || !port->tty->termios) {
1597                                         cflag = port->normal_termios.c_cflag;
1598                                         iflag = port->normal_termios.c_iflag;
1599                                 } else {
1600                                         cflag = port->tty->termios->c_cflag;
1601                                         iflag = port->tty->termios->c_iflag;
1602                                 }
1603
1604                                 mon_data_ext.databits[i] = cflag & CSIZE;
1605
1606                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1607
1608                                 mon_data_ext.parity[i] =
1609                                         cflag & (PARENB | PARODD | CMSPAR);
1610
1611                                 mon_data_ext.flowctrl[i] = 0x00;
1612
1613                                 if (cflag & CRTSCTS)
1614                                         mon_data_ext.flowctrl[i] |= 0x03;
1615
1616                                 if (iflag & (IXON | IXOFF))
1617                                         mon_data_ext.flowctrl[i] |= 0x0C;
1618
1619                                 if (port->type == PORT_16550A)
1620                                         mon_data_ext.fifo[i] = 1;
1621                                 else
1622                                         mon_data_ext.fifo[i] = 0;
1623
1624                                 p = i % 4;
1625                                 shiftbit = p * 2;
1626                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1627                                 opmode &= OP_MODE_MASK;
1628
1629                                 mon_data_ext.iftype[i] = opmode;
1630
1631                         }
1632                         if (copy_to_user(argp, &mon_data_ext,
1633                                                 sizeof(mon_data_ext)))
1634                                 return -EFAULT;
1635
1636                         return 0;
1637
1638         } default:
1639                 return -ENOIOCTLCMD;
1640         }
1641         return 0;
1642 }
1643
1644 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1645                 unsigned int cmd, unsigned long arg)
1646 {
1647         struct mxser_port *info = tty->driver_data;
1648         struct async_icount cprev, cnow;        /* kernel counter temps */
1649         struct serial_icounter_struct __user *p_cuser;
1650         unsigned long templ;
1651         unsigned long flags;
1652         unsigned int i;
1653         void __user *argp = (void __user *)arg;
1654         int retval;
1655
1656         if (tty->index == MXSER_PORTS)
1657                 return mxser_ioctl_special(cmd, argp);
1658
1659         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1660                 int p;
1661                 unsigned long opmode;
1662                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1663                 int shiftbit;
1664                 unsigned char val, mask;
1665
1666                 p = tty->index % 4;
1667                 if (cmd == MOXA_SET_OP_MODE) {
1668                         if (get_user(opmode, (int __user *) argp))
1669                                 return -EFAULT;
1670                         if (opmode != RS232_MODE &&
1671                                         opmode != RS485_2WIRE_MODE &&
1672                                         opmode != RS422_MODE &&
1673                                         opmode != RS485_4WIRE_MODE)
1674                                 return -EFAULT;
1675                         mask = ModeMask[p];
1676                         shiftbit = p * 2;
1677                         val = inb(info->opmode_ioaddr);
1678                         val &= mask;
1679                         val |= (opmode << shiftbit);
1680                         outb(val, info->opmode_ioaddr);
1681                 } else {
1682                         shiftbit = p * 2;
1683                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1684                         opmode &= OP_MODE_MASK;
1685                         if (copy_to_user(argp, &opmode, sizeof(int)))
1686                                 return -EFAULT;
1687                 }
1688                 return 0;
1689         }
1690
1691         if (cmd == MOXA_SET_SPECIAL_BAUD_RATE) {
1692                 int speed;
1693
1694                 if (get_user(speed, (int __user *)argp))
1695                         return -EFAULT;
1696                 if (speed <= 0 || speed > info->max_baud)
1697                         return -EFAULT;
1698                 if (!info->tty || !info->tty->termios || !info->ioaddr)
1699                         return 0;
1700                 info->tty->termios->c_cflag &= ~(CBAUD | CBAUDEX);
1701                 for (i = 0; i < BAUD_TABLE_NO; i++)
1702                         if (speed == mxvar_baud_table[i])
1703                                 break;
1704                 if (i == BAUD_TABLE_NO) {
1705                         info->tty->termios->c_cflag |= B_SPEC;
1706                 } else if (speed != 0)
1707                         info->tty->termios->c_cflag |= mxvar_baud_table1[i];
1708
1709                 info->speed = speed;
1710                 spin_lock_irqsave(&info->slock, flags);
1711                 mxser_change_speed(info, NULL);
1712                 spin_unlock_irqrestore(&info->slock, flags);
1713
1714                 return 0;
1715         } else if (cmd == MOXA_GET_SPECIAL_BAUD_RATE) {
1716                 if (copy_to_user(argp, &info->speed, sizeof(int)))
1717                      return -EFAULT;
1718                 return 0;
1719         }
1720
1721         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1722                         test_bit(TTY_IO_ERROR, &tty->flags))
1723                 return -EIO;
1724
1725         switch (cmd) {
1726         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1727                 retval = tty_check_change(tty);
1728                 if (retval)
1729                         return retval;
1730                 tty_wait_until_sent(tty, 0);
1731                 if (!arg)
1732                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1733                 return 0;
1734         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1735                 retval = tty_check_change(tty);
1736                 if (retval)
1737                         return retval;
1738                 tty_wait_until_sent(tty, 0);
1739                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1740                 return 0;
1741         case TIOCGSOFTCAR:
1742                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1743         case TIOCSSOFTCAR:
1744                 if (get_user(templ, (unsigned long __user *) argp))
1745                         return -EFAULT;
1746                 arg = templ;
1747                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1748                 return 0;
1749         case TIOCGSERIAL:
1750                 return mxser_get_serial_info(info, argp);
1751         case TIOCSSERIAL:
1752                 return mxser_set_serial_info(info, argp);
1753         case TIOCSERGETLSR:     /* Get line status register */
1754                 return mxser_get_lsr_info(info, argp);
1755                 /*
1756                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1757                  * - mask passed in arg for lines of interest
1758                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1759                  * Caller should use TIOCGICOUNT to see which one it was
1760                  */
1761         case TIOCMIWAIT: {
1762                 DECLARE_WAITQUEUE(wait, current);
1763                 int ret;
1764                 spin_lock_irqsave(&info->slock, flags);
1765                 cprev = info->icount;   /* note the counters on entry */
1766                 spin_unlock_irqrestore(&info->slock, flags);
1767
1768                 add_wait_queue(&info->delta_msr_wait, &wait);
1769                 while (1) {
1770                         spin_lock_irqsave(&info->slock, flags);
1771                         cnow = info->icount;    /* atomic copy */
1772                         spin_unlock_irqrestore(&info->slock, flags);
1773
1774                         set_current_state(TASK_INTERRUPTIBLE);
1775                         if (((arg & TIOCM_RNG) &&
1776                                         (cnow.rng != cprev.rng)) ||
1777                                         ((arg & TIOCM_DSR) &&
1778                                         (cnow.dsr != cprev.dsr)) ||
1779                                         ((arg & TIOCM_CD) &&
1780                                         (cnow.dcd != cprev.dcd)) ||
1781                                         ((arg & TIOCM_CTS) &&
1782                                         (cnow.cts != cprev.cts))) {
1783                                 ret = 0;
1784                                 break;
1785                         }
1786                         /* see if a signal did it */
1787                         if (signal_pending(current)) {
1788                                 ret = -ERESTARTSYS;
1789                                 break;
1790                         }
1791                         cprev = cnow;
1792                 }
1793                 current->state = TASK_RUNNING;
1794                 remove_wait_queue(&info->delta_msr_wait, &wait);
1795                 break;
1796         }
1797         /* NOTREACHED */
1798         /*
1799          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1800          * Return: write counters to the user passed counter struct
1801          * NB: both 1->0 and 0->1 transitions are counted except for
1802          *     RI where only 0->1 is counted.
1803          */
1804         case TIOCGICOUNT:
1805                 spin_lock_irqsave(&info->slock, flags);
1806                 cnow = info->icount;
1807                 spin_unlock_irqrestore(&info->slock, flags);
1808                 p_cuser = argp;
1809                 if (put_user(cnow.frame, &p_cuser->frame))
1810                         return -EFAULT;
1811                 if (put_user(cnow.brk, &p_cuser->brk))
1812                         return -EFAULT;
1813                 if (put_user(cnow.overrun, &p_cuser->overrun))
1814                         return -EFAULT;
1815                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1816                         return -EFAULT;
1817                 if (put_user(cnow.parity, &p_cuser->parity))
1818                         return -EFAULT;
1819                 if (put_user(cnow.rx, &p_cuser->rx))
1820                         return -EFAULT;
1821                 if (put_user(cnow.tx, &p_cuser->tx))
1822                         return -EFAULT;
1823                 put_user(cnow.cts, &p_cuser->cts);
1824                 put_user(cnow.dsr, &p_cuser->dsr);
1825                 put_user(cnow.rng, &p_cuser->rng);
1826                 put_user(cnow.dcd, &p_cuser->dcd);
1827                 return 0;
1828         case MOXA_HighSpeedOn:
1829                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1830         case MOXA_SDS_RSTICOUNTER:
1831                 info->mon_data.rxcnt = 0;
1832                 info->mon_data.txcnt = 0;
1833                 return 0;
1834         case MOXA_ASPP_SETBAUD:{
1835                 long baud;
1836                 if (get_user(baud, (long __user *)argp))
1837                         return -EFAULT;
1838                 spin_lock_irqsave(&info->slock, flags);
1839                 mxser_set_baud(info, baud);
1840                 spin_unlock_irqrestore(&info->slock, flags);
1841                 return 0;
1842         }
1843         case MOXA_ASPP_GETBAUD:
1844                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1845                         return -EFAULT;
1846
1847                 return 0;
1848
1849         case MOXA_ASPP_OQUEUE:{
1850                 int len, lsr;
1851
1852                 len = mxser_chars_in_buffer(tty);
1853
1854                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1855
1856                 len += (lsr ? 0 : 1);
1857
1858                 if (copy_to_user(argp, &len, sizeof(int)))
1859                         return -EFAULT;
1860
1861                 return 0;
1862         }
1863         case MOXA_ASPP_MON: {
1864                 int mcr, status;
1865
1866                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1867                 mxser_check_modem_status(info, status);
1868
1869                 mcr = inb(info->ioaddr + UART_MCR);
1870                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1871                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1872                 else
1873                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1874
1875                 if (mcr & MOXA_MUST_MCR_TX_XON)
1876                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1877                 else
1878                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1879
1880                 if (info->tty->hw_stopped)
1881                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1882                 else
1883                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1884
1885                 if (copy_to_user(argp, &info->mon_data,
1886                                 sizeof(struct mxser_mon)))
1887                         return -EFAULT;
1888
1889                 return 0;
1890         }
1891         case MOXA_ASPP_LSTATUS: {
1892                 if (copy_to_user(argp, &info->err_shadow,
1893                                 sizeof(unsigned char)))
1894                         return -EFAULT;
1895
1896                 info->err_shadow = 0;
1897                 return 0;
1898         }
1899         case MOXA_SET_BAUD_METHOD: {
1900                 int method;
1901
1902                 if (get_user(method, (int __user *)argp))
1903                         return -EFAULT;
1904                 mxser_set_baud_method[tty->index] = method;
1905                 if (copy_to_user(argp, &method, sizeof(int)))
1906                         return -EFAULT;
1907
1908                 return 0;
1909         }
1910         default:
1911                 return -ENOIOCTLCMD;
1912         }
1913         return 0;
1914 }
1915
1916 static void mxser_stoprx(struct tty_struct *tty)
1917 {
1918         struct mxser_port *info = tty->driver_data;
1919
1920         info->ldisc_stop_rx = 1;
1921         if (I_IXOFF(tty)) {
1922                 if (info->board->chip_flag) {
1923                         info->IER &= ~MOXA_MUST_RECV_ISR;
1924                         outb(info->IER, info->ioaddr + UART_IER);
1925                 } else {
1926                         info->x_char = STOP_CHAR(tty);
1927                         outb(0, info->ioaddr + UART_IER);
1928                         info->IER |= UART_IER_THRI;
1929                         outb(info->IER, info->ioaddr + UART_IER);
1930                 }
1931         }
1932
1933         if (info->tty->termios->c_cflag & CRTSCTS) {
1934                 info->MCR &= ~UART_MCR_RTS;
1935                 outb(info->MCR, info->ioaddr + UART_MCR);
1936         }
1937 }
1938
1939 /*
1940  * This routine is called by the upper-layer tty layer to signal that
1941  * incoming characters should be throttled.
1942  */
1943 static void mxser_throttle(struct tty_struct *tty)
1944 {
1945         mxser_stoprx(tty);
1946 }
1947
1948 static void mxser_unthrottle(struct tty_struct *tty)
1949 {
1950         struct mxser_port *info = tty->driver_data;
1951
1952         /* startrx */
1953         info->ldisc_stop_rx = 0;
1954         if (I_IXOFF(tty)) {
1955                 if (info->x_char)
1956                         info->x_char = 0;
1957                 else {
1958                         if (info->board->chip_flag) {
1959                                 info->IER |= MOXA_MUST_RECV_ISR;
1960                                 outb(info->IER, info->ioaddr + UART_IER);
1961                         } else {
1962                                 info->x_char = START_CHAR(tty);
1963                                 outb(0, info->ioaddr + UART_IER);
1964                                 info->IER |= UART_IER_THRI;
1965                                 outb(info->IER, info->ioaddr + UART_IER);
1966                         }
1967                 }
1968         }
1969
1970         if (info->tty->termios->c_cflag & CRTSCTS) {
1971                 info->MCR |= UART_MCR_RTS;
1972                 outb(info->MCR, info->ioaddr + UART_MCR);
1973         }
1974 }
1975
1976 /*
1977  * mxser_stop() and mxser_start()
1978  *
1979  * This routines are called before setting or resetting tty->stopped.
1980  * They enable or disable transmitter interrupts, as necessary.
1981  */
1982 static void mxser_stop(struct tty_struct *tty)
1983 {
1984         struct mxser_port *info = tty->driver_data;
1985         unsigned long flags;
1986
1987         spin_lock_irqsave(&info->slock, flags);
1988         if (info->IER & UART_IER_THRI) {
1989                 info->IER &= ~UART_IER_THRI;
1990                 outb(info->IER, info->ioaddr + UART_IER);
1991         }
1992         spin_unlock_irqrestore(&info->slock, flags);
1993 }
1994
1995 static void mxser_start(struct tty_struct *tty)
1996 {
1997         struct mxser_port *info = tty->driver_data;
1998         unsigned long flags;
1999
2000         spin_lock_irqsave(&info->slock, flags);
2001         if (info->xmit_cnt && info->xmit_buf) {
2002                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
2003                 info->IER |= UART_IER_THRI;
2004                 outb(info->IER, info->ioaddr + UART_IER);
2005         }
2006         spin_unlock_irqrestore(&info->slock, flags);
2007 }
2008
2009 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2010 {
2011         struct mxser_port *info = tty->driver_data;
2012         unsigned long flags;
2013
2014         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
2015                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
2016
2017                 spin_lock_irqsave(&info->slock, flags);
2018                 mxser_change_speed(info, old_termios);
2019                 spin_unlock_irqrestore(&info->slock, flags);
2020
2021                 if ((old_termios->c_cflag & CRTSCTS) &&
2022                                 !(tty->termios->c_cflag & CRTSCTS)) {
2023                         tty->hw_stopped = 0;
2024                         mxser_start(tty);
2025                 }
2026         }
2027
2028         /* Handle sw stopped */
2029         if ((old_termios->c_iflag & IXON) &&
2030                         !(tty->termios->c_iflag & IXON)) {
2031                 tty->stopped = 0;
2032
2033                 if (info->board->chip_flag) {
2034                         spin_lock_irqsave(&info->slock, flags);
2035                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2036                         spin_unlock_irqrestore(&info->slock, flags);
2037                 }
2038
2039                 mxser_start(tty);
2040         }
2041 }
2042
2043 /*
2044  * mxser_wait_until_sent() --- wait until the transmitter is empty
2045  */
2046 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2047 {
2048         struct mxser_port *info = tty->driver_data;
2049         unsigned long orig_jiffies, char_time;
2050         int lsr;
2051
2052         if (info->type == PORT_UNKNOWN)
2053                 return;
2054
2055         if (info->xmit_fifo_size == 0)
2056                 return;         /* Just in case.... */
2057
2058         orig_jiffies = jiffies;
2059         /*
2060          * Set the check interval to be 1/5 of the estimated time to
2061          * send a single character, and make it at least 1.  The check
2062          * interval should also be less than the timeout.
2063          *
2064          * Note: we have to use pretty tight timings here to satisfy
2065          * the NIST-PCTS.
2066          */
2067         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2068         char_time = char_time / 5;
2069         if (char_time == 0)
2070                 char_time = 1;
2071         if (timeout && timeout < char_time)
2072                 char_time = timeout;
2073         /*
2074          * If the transmitter hasn't cleared in twice the approximate
2075          * amount of time to send the entire FIFO, it probably won't
2076          * ever clear.  This assumes the UART isn't doing flow
2077          * control, which is currently the case.  Hence, if it ever
2078          * takes longer than info->timeout, this is probably due to a
2079          * UART bug of some kind.  So, we clamp the timeout parameter at
2080          * 2*info->timeout.
2081          */
2082         if (!timeout || timeout > 2 * info->timeout)
2083                 timeout = 2 * info->timeout;
2084 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2085         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2086                 timeout, char_time);
2087         printk("jiff=%lu...", jiffies);
2088 #endif
2089         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2090 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2091                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2092 #endif
2093                 schedule_timeout_interruptible(char_time);
2094                 if (signal_pending(current))
2095                         break;
2096                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2097                         break;
2098         }
2099         set_current_state(TASK_RUNNING);
2100
2101 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2102         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2103 #endif
2104 }
2105
2106 /*
2107  * This routine is called by tty_hangup() when a hangup is signaled.
2108  */
2109 static void mxser_hangup(struct tty_struct *tty)
2110 {
2111         struct mxser_port *info = tty->driver_data;
2112
2113         mxser_flush_buffer(tty);
2114         mxser_shutdown(info);
2115         info->event = 0;
2116         info->count = 0;
2117         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2118         info->tty = NULL;
2119         wake_up_interruptible(&info->open_wait);
2120 }
2121
2122 /*
2123  * mxser_rs_break() --- routine which turns the break handling on or off
2124  */
2125 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2126 {
2127         struct mxser_port *info = tty->driver_data;
2128         unsigned long flags;
2129
2130         spin_lock_irqsave(&info->slock, flags);
2131         if (break_state == -1)
2132                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2133                         info->ioaddr + UART_LCR);
2134         else
2135                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2136                         info->ioaddr + UART_LCR);
2137         spin_unlock_irqrestore(&info->slock, flags);
2138 }
2139
2140 static void mxser_receive_chars(struct mxser_port *port, int *status)
2141 {
2142         struct tty_struct *tty = port->tty;
2143         unsigned char ch, gdl;
2144         int ignored = 0;
2145         int cnt = 0;
2146         int recv_room;
2147         int max = 256;
2148
2149         recv_room = tty->receive_room;
2150         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2151                 mxser_stoprx(tty);
2152
2153         if (port->board->chip_flag != MOXA_OTHER_UART) {
2154
2155                 if (*status & UART_LSR_SPECIAL)
2156                         goto intr_old;
2157                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2158                                 (*status & MOXA_MUST_LSR_RERR))
2159                         goto intr_old;
2160                 if (*status & MOXA_MUST_LSR_RERR)
2161                         goto intr_old;
2162
2163                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2164
2165                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2166                         gdl &= MOXA_MUST_GDL_MASK;
2167                 if (gdl >= recv_room) {
2168                         if (!port->ldisc_stop_rx)
2169                                 mxser_stoprx(tty);
2170                 }
2171                 while (gdl--) {
2172                         ch = inb(port->ioaddr + UART_RX);
2173                         tty_insert_flip_char(tty, ch, 0);
2174                         cnt++;
2175                 }
2176                 goto end_intr;
2177         }
2178 intr_old:
2179
2180         do {
2181                 if (max-- < 0)
2182                         break;
2183
2184                 ch = inb(port->ioaddr + UART_RX);
2185                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2186                         outb(0x23, port->ioaddr + UART_FCR);
2187                 *status &= port->read_status_mask;
2188                 if (*status & port->ignore_status_mask) {
2189                         if (++ignored > 100)
2190                                 break;
2191                 } else {
2192                         char flag = 0;
2193                         if (*status & UART_LSR_SPECIAL) {
2194                                 if (*status & UART_LSR_BI) {
2195                                         flag = TTY_BREAK;
2196                                         port->icount.brk++;
2197
2198                                         if (port->flags & ASYNC_SAK)
2199                                                 do_SAK(tty);
2200                                 } else if (*status & UART_LSR_PE) {
2201                                         flag = TTY_PARITY;
2202                                         port->icount.parity++;
2203                                 } else if (*status & UART_LSR_FE) {
2204                                         flag = TTY_FRAME;
2205                                         port->icount.frame++;
2206                                 } else if (*status & UART_LSR_OE) {
2207                                         flag = TTY_OVERRUN;
2208                                         port->icount.overrun++;
2209                                 } else
2210                                         flag = TTY_BREAK;
2211                         }
2212                         tty_insert_flip_char(tty, ch, flag);
2213                         cnt++;
2214                         if (cnt >= recv_room) {
2215                                 if (!port->ldisc_stop_rx)
2216                                         mxser_stoprx(tty);
2217                                 break;
2218                         }
2219
2220                 }
2221
2222                 if (port->board->chip_flag)
2223                         break;
2224
2225                 *status = inb(port->ioaddr + UART_LSR);
2226         } while (*status & UART_LSR_DR);
2227
2228 end_intr:
2229         mxvar_log.rxcnt[port->tty->index] += cnt;
2230         port->mon_data.rxcnt += cnt;
2231         port->mon_data.up_rxcnt += cnt;
2232
2233         tty_flip_buffer_push(tty);
2234 }
2235
2236 static void mxser_transmit_chars(struct mxser_port *port)
2237 {
2238         int count, cnt;
2239
2240         if (port->x_char) {
2241                 outb(port->x_char, port->ioaddr + UART_TX);
2242                 port->x_char = 0;
2243                 mxvar_log.txcnt[port->tty->index]++;
2244                 port->mon_data.txcnt++;
2245                 port->mon_data.up_txcnt++;
2246                 port->icount.tx++;
2247                 return;
2248         }
2249
2250         if (port->xmit_buf == 0)
2251                 return;
2252
2253         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2254                         (port->tty->hw_stopped &&
2255                         (port->type != PORT_16550A) &&
2256                         (!port->board->chip_flag))) {
2257                 port->IER &= ~UART_IER_THRI;
2258                 outb(port->IER, port->ioaddr + UART_IER);
2259                 return;
2260         }
2261
2262         cnt = port->xmit_cnt;
2263         count = port->xmit_fifo_size;
2264         do {
2265                 outb(port->xmit_buf[port->xmit_tail++],
2266                         port->ioaddr + UART_TX);
2267                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2268                 if (--port->xmit_cnt <= 0)
2269                         break;
2270         } while (--count > 0);
2271         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2272
2273         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2274         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2275         port->icount.tx += (cnt - port->xmit_cnt);
2276
2277         if (port->xmit_cnt < WAKEUP_CHARS)
2278                 tty_wakeup(port->tty);
2279
2280         if (port->xmit_cnt <= 0) {
2281                 port->IER &= ~UART_IER_THRI;
2282                 outb(port->IER, port->ioaddr + UART_IER);
2283         }
2284 }
2285
2286 /*
2287  * This is the serial driver's generic interrupt routine
2288  */
2289 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2290 {
2291         int status, iir, i;
2292         struct mxser_board *brd = NULL;
2293         struct mxser_port *port;
2294         int max, irqbits, bits, msr;
2295         unsigned int int_cnt, pass_counter = 0;
2296         int handled = IRQ_NONE;
2297
2298         for (i = 0; i < MXSER_BOARDS; i++)
2299                 if (dev_id == &mxser_boards[i]) {
2300                         brd = dev_id;
2301                         break;
2302                 }
2303
2304         if (i == MXSER_BOARDS)
2305                 goto irq_stop;
2306         if (brd == NULL)
2307                 goto irq_stop;
2308         max = brd->info->nports;
2309         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2310                 irqbits = inb(brd->vector) & brd->vector_mask;
2311                 if (irqbits == brd->vector_mask)
2312                         break;
2313
2314                 handled = IRQ_HANDLED;
2315                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2316                         if (irqbits == brd->vector_mask)
2317                                 break;
2318                         if (bits & irqbits)
2319                                 continue;
2320                         port = &brd->ports[i];
2321
2322                         int_cnt = 0;
2323                         spin_lock(&port->slock);
2324                         do {
2325                                 iir = inb(port->ioaddr + UART_IIR);
2326                                 if (iir & UART_IIR_NO_INT)
2327                                         break;
2328                                 iir &= MOXA_MUST_IIR_MASK;
2329                                 if (!port->tty ||
2330                                                 (port->flags & ASYNC_CLOSING) ||
2331                                                 !(port->flags &
2332                                                         ASYNC_INITIALIZED)) {
2333                                         status = inb(port->ioaddr + UART_LSR);
2334                                         outb(0x27, port->ioaddr + UART_FCR);
2335                                         inb(port->ioaddr + UART_MSR);
2336                                         break;
2337                                 }
2338
2339                                 status = inb(port->ioaddr + UART_LSR);
2340
2341                                 if (status & UART_LSR_PE)
2342                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2343                                 if (status & UART_LSR_FE)
2344                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2345                                 if (status & UART_LSR_OE)
2346                                         port->err_shadow |=
2347                                                 NPPI_NOTIFY_HW_OVERRUN;
2348                                 if (status & UART_LSR_BI)
2349                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2350
2351                                 if (port->board->chip_flag) {
2352                                         if (iir == MOXA_MUST_IIR_GDA ||
2353                                             iir == MOXA_MUST_IIR_RDA ||
2354                                             iir == MOXA_MUST_IIR_RTO ||
2355                                             iir == MOXA_MUST_IIR_LSR)
2356                                                 mxser_receive_chars(port,
2357                                                                 &status);
2358
2359                                 } else {
2360                                         status &= port->read_status_mask;
2361                                         if (status & UART_LSR_DR)
2362                                                 mxser_receive_chars(port,
2363                                                                 &status);
2364                                 }
2365                                 msr = inb(port->ioaddr + UART_MSR);
2366                                 if (msr & UART_MSR_ANY_DELTA)
2367                                         mxser_check_modem_status(port, msr);
2368
2369                                 if (port->board->chip_flag) {
2370                                         if (iir == 0x02 && (status &
2371                                                                 UART_LSR_THRE))
2372                                                 mxser_transmit_chars(port);
2373                                 } else {
2374                                         if (status & UART_LSR_THRE)
2375                                                 mxser_transmit_chars(port);
2376                                 }
2377                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2378                         spin_unlock(&port->slock);
2379                 }
2380         }
2381
2382 irq_stop:
2383         return handled;
2384 }
2385
2386 static const struct tty_operations mxser_ops = {
2387         .open = mxser_open,
2388         .close = mxser_close,
2389         .write = mxser_write,
2390         .put_char = mxser_put_char,
2391         .flush_chars = mxser_flush_chars,
2392         .write_room = mxser_write_room,
2393         .chars_in_buffer = mxser_chars_in_buffer,
2394         .flush_buffer = mxser_flush_buffer,
2395         .ioctl = mxser_ioctl,
2396         .throttle = mxser_throttle,
2397         .unthrottle = mxser_unthrottle,
2398         .set_termios = mxser_set_termios,
2399         .stop = mxser_stop,
2400         .start = mxser_start,
2401         .hangup = mxser_hangup,
2402         .break_ctl = mxser_rs_break,
2403         .wait_until_sent = mxser_wait_until_sent,
2404         .tiocmget = mxser_tiocmget,
2405         .tiocmset = mxser_tiocmset,
2406 };
2407
2408 /*
2409  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2410  */
2411
2412 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2413                 unsigned int irq)
2414 {
2415         if (irq)
2416                 free_irq(brd->irq, brd);
2417         if (pdev != NULL) {     /* PCI */
2418 #ifdef CONFIG_PCI
2419                 pci_release_region(pdev, 2);
2420                 pci_release_region(pdev, 3);
2421 #endif
2422         } else {
2423                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2424                 release_region(brd->vector, 1);
2425         }
2426 }
2427
2428 static int __devinit mxser_initbrd(struct mxser_board *brd,
2429                 struct pci_dev *pdev)
2430 {
2431         struct mxser_port *info;
2432         unsigned int i;
2433         int retval;
2434
2435         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2436
2437         for (i = 0; i < brd->info->nports; i++) {
2438                 info = &brd->ports[i];
2439                 info->board = brd;
2440                 info->stop_rx = 0;
2441                 info->ldisc_stop_rx = 0;
2442
2443                 /* Enhance mode enabled here */
2444                 if (brd->chip_flag != MOXA_OTHER_UART)
2445                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2446
2447                 info->flags = ASYNC_SHARE_IRQ;
2448                 info->type = brd->uart_type;
2449
2450                 process_txrx_fifo(info);
2451
2452                 info->custom_divisor = info->baud_base * 16;
2453                 info->close_delay = 5 * HZ / 10;
2454                 info->closing_wait = 30 * HZ;
2455                 info->normal_termios = mxvar_sdriver->init_termios;
2456                 init_waitqueue_head(&info->open_wait);
2457                 init_waitqueue_head(&info->delta_msr_wait);
2458                 info->speed = 9600;
2459                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2460                 info->err_shadow = 0;
2461                 spin_lock_init(&info->slock);
2462
2463                 /* before set INT ISR, disable all int */
2464                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2465                         info->ioaddr + UART_IER);
2466         }
2467
2468         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2469                         brd);
2470         if (retval) {
2471                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2472                         "conflict with another device.\n",
2473                         brd->info->name, brd->irq);
2474                 /* We hold resources, we need to release them. */
2475                 mxser_release_res(brd, pdev, 0);
2476         }
2477         return retval;
2478 }
2479
2480 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2481 {
2482         int id, i, bits;
2483         unsigned short regs[16], irq;
2484         unsigned char scratch, scratch2;
2485
2486         brd->chip_flag = MOXA_OTHER_UART;
2487
2488         id = mxser_read_register(cap, regs);
2489         switch (id) {
2490         case C168_ASIC_ID:
2491                 brd->info = &mxser_cards[0];
2492                 break;
2493         case C104_ASIC_ID:
2494                 brd->info = &mxser_cards[1];
2495                 break;
2496         case CI104J_ASIC_ID:
2497                 brd->info = &mxser_cards[2];
2498                 break;
2499         case C102_ASIC_ID:
2500                 brd->info = &mxser_cards[5];
2501                 break;
2502         case CI132_ASIC_ID:
2503                 brd->info = &mxser_cards[6];
2504                 break;
2505         case CI134_ASIC_ID:
2506                 brd->info = &mxser_cards[7];
2507                 break;
2508         default:
2509                 return 0;
2510         }
2511
2512         irq = 0;
2513         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2514            Flag-hack checks if configuration should be read as 2-port here. */
2515         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2516                 irq = regs[9] & 0xF000;
2517                 irq = irq | (irq >> 4);
2518                 if (irq != (regs[9] & 0xFF00))
2519                         return MXSER_ERR_IRQ_CONFLIT;
2520         } else if (brd->info->nports == 4) {
2521                 irq = regs[9] & 0xF000;
2522                 irq = irq | (irq >> 4);
2523                 irq = irq | (irq >> 8);
2524                 if (irq != regs[9])
2525                         return MXSER_ERR_IRQ_CONFLIT;
2526         } else if (brd->info->nports == 8) {
2527                 irq = regs[9] & 0xF000;
2528                 irq = irq | (irq >> 4);
2529                 irq = irq | (irq >> 8);
2530                 if ((irq != regs[9]) || (irq != regs[10]))
2531                         return MXSER_ERR_IRQ_CONFLIT;
2532         }
2533
2534         if (!irq)
2535                 return MXSER_ERR_IRQ;
2536         brd->irq = ((int)(irq & 0xF000) >> 12);
2537         for (i = 0; i < 8; i++)
2538                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2539         if ((regs[12] & 0x80) == 0)
2540                 return MXSER_ERR_VECTOR;
2541         brd->vector = (int)regs[11];    /* interrupt vector */
2542         if (id == 1)
2543                 brd->vector_mask = 0x00FF;
2544         else
2545                 brd->vector_mask = 0x000F;
2546         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2547                 if (regs[12] & bits) {
2548                         brd->ports[i].baud_base = 921600;
2549                         brd->ports[i].max_baud = 921600;
2550                 } else {
2551                         brd->ports[i].baud_base = 115200;
2552                         brd->ports[i].max_baud = 115200;
2553                 }
2554         }
2555         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2556         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2557         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2558         outb(scratch2, cap + UART_LCR);
2559         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2560         scratch = inb(cap + UART_IIR);
2561
2562         if (scratch & 0xC0)
2563                 brd->uart_type = PORT_16550A;
2564         else
2565                 brd->uart_type = PORT_16450;
2566         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2567                         "mxser(IO)"))
2568                 return MXSER_ERR_IOADDR;
2569         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2570                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2571                 return MXSER_ERR_VECTOR;
2572         }
2573         return brd->info->nports;
2574 }
2575
2576 static int __devinit mxser_probe(struct pci_dev *pdev,
2577                 const struct pci_device_id *ent)
2578 {
2579 #ifdef CONFIG_PCI
2580         struct mxser_board *brd;
2581         unsigned int i, j;
2582         unsigned long ioaddress;
2583         int retval = -EINVAL;
2584
2585         for (i = 0; i < MXSER_BOARDS; i++)
2586                 if (mxser_boards[i].info == NULL)
2587                         break;
2588
2589         if (i >= MXSER_BOARDS) {
2590                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2591                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2592                 goto err;
2593         }
2594
2595         brd = &mxser_boards[i];
2596         brd->idx = i * MXSER_PORTS_PER_BOARD;
2597         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2598                 mxser_cards[ent->driver_data].name,
2599                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2600
2601         retval = pci_enable_device(pdev);
2602         if (retval) {
2603                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2604                 goto err;
2605         }
2606
2607         /* io address */
2608         ioaddress = pci_resource_start(pdev, 2);
2609         retval = pci_request_region(pdev, 2, "mxser(IO)");
2610         if (retval)
2611                 goto err;
2612
2613         brd->info = &mxser_cards[ent->driver_data];
2614         for (i = 0; i < brd->info->nports; i++)
2615                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2616
2617         /* vector */
2618         ioaddress = pci_resource_start(pdev, 3);
2619         retval = pci_request_region(pdev, 3, "mxser(vector)");
2620         if (retval)
2621                 goto err_relio;
2622         brd->vector = ioaddress;
2623
2624         /* irq */
2625         brd->irq = pdev->irq;
2626
2627         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2628         brd->uart_type = PORT_16550A;
2629         brd->vector_mask = 0;
2630
2631         for (i = 0; i < brd->info->nports; i++) {
2632                 for (j = 0; j < UART_INFO_NUM; j++) {
2633                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2634                                 brd->ports[i].max_baud =
2635                                         Gpci_uart_info[j].max_baud;
2636
2637                                 /* exception....CP-102 */
2638                                 if (brd->info->flags & MXSER_HIGHBAUD)
2639                                         brd->ports[i].max_baud = 921600;
2640                                 break;
2641                         }
2642                 }
2643         }
2644
2645         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2646                 for (i = 0; i < brd->info->nports; i++) {
2647                         if (i < 4)
2648                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2649                         else
2650                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2651                 }
2652                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2653                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2654         }
2655
2656         for (i = 0; i < brd->info->nports; i++) {
2657                 brd->vector_mask |= (1 << i);
2658                 brd->ports[i].baud_base = 921600;
2659         }
2660
2661         /* mxser_initbrd will hook ISR. */
2662         retval = mxser_initbrd(brd, pdev);
2663         if (retval)
2664                 goto err_null;
2665
2666         for (i = 0; i < brd->info->nports; i++)
2667                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2668
2669         pci_set_drvdata(pdev, brd);
2670
2671         return 0;
2672 err_relio:
2673         pci_release_region(pdev, 2);
2674 err_null:
2675         brd->info = NULL;
2676 err:
2677         return retval;
2678 #else
2679         return -ENODEV;
2680 #endif
2681 }
2682
2683 static void __devexit mxser_remove(struct pci_dev *pdev)
2684 {
2685         struct mxser_board *brd = pci_get_drvdata(pdev);
2686         unsigned int i;
2687
2688         for (i = 0; i < brd->info->nports; i++)
2689                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2690
2691         mxser_release_res(brd, pdev, 1);
2692         brd->info = NULL;
2693 }
2694
2695 static struct pci_driver mxser_driver = {
2696         .name = "mxser",
2697         .id_table = mxser_pcibrds,
2698         .probe = mxser_probe,
2699         .remove = __devexit_p(mxser_remove)
2700 };
2701
2702 static int __init mxser_module_init(void)
2703 {
2704         struct mxser_board *brd;
2705         unsigned long cap;
2706         unsigned int i, m, isaloop;
2707         int retval, b;
2708
2709         pr_debug("Loading module mxser ...\n");
2710
2711         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2712         if (!mxvar_sdriver)
2713                 return -ENOMEM;
2714
2715         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2716                 MXSER_VERSION);
2717
2718         /* Initialize the tty_driver structure */
2719         mxvar_sdriver->owner = THIS_MODULE;
2720         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2721         mxvar_sdriver->name = "ttyMI";
2722         mxvar_sdriver->major = ttymajor;
2723         mxvar_sdriver->minor_start = 0;
2724         mxvar_sdriver->num = MXSER_PORTS + 1;
2725         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2726         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2727         mxvar_sdriver->init_termios = tty_std_termios;
2728         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2729         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2730         tty_set_operations(mxvar_sdriver, &mxser_ops);
2731
2732         retval = tty_register_driver(mxvar_sdriver);
2733         if (retval) {
2734                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2735                                 "tty driver !\n");
2736                 goto err_put;
2737         }
2738
2739         mxvar_diagflag = 0;
2740
2741         m = 0;
2742         /* Start finding ISA boards here */
2743         for (isaloop = 0; isaloop < 2; isaloop++)
2744                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2745                         if (!isaloop)
2746                                 cap = mxserBoardCAP[b]; /* predefined */
2747                         else
2748                                 cap = ioaddr[b]; /* module param */
2749
2750                         if (!cap)
2751                                 continue;
2752
2753                         brd = &mxser_boards[m];
2754                         retval = mxser_get_ISA_conf(cap, brd);
2755
2756                         if (retval != 0)
2757                                 printk(KERN_INFO "Found MOXA %s board "
2758                                         "(CAP=0x%x)\n",
2759                                         brd->info->name, ioaddr[b]);
2760
2761                         if (retval <= 0) {
2762                                 if (retval == MXSER_ERR_IRQ)
2763                                         printk(KERN_ERR "Invalid interrupt "
2764                                                 "number, board not "
2765                                                 "configured\n");
2766                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2767                                         printk(KERN_ERR "Invalid interrupt "
2768                                                 "number, board not "
2769                                                 "configured\n");
2770                                 else if (retval == MXSER_ERR_VECTOR)
2771                                         printk(KERN_ERR "Invalid interrupt "
2772                                                 "vector, board not "
2773                                                 "configured\n");
2774                                 else if (retval == MXSER_ERR_IOADDR)
2775                                         printk(KERN_ERR "Invalid I/O address, "
2776                                                 "board not configured\n");
2777
2778                                 brd->info = NULL;
2779                                 continue;
2780                         }
2781
2782                         /* mxser_initbrd will hook ISR. */
2783                         if (mxser_initbrd(brd, NULL) < 0) {
2784                                 brd->info = NULL;
2785                                 continue;
2786                         }
2787
2788                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2789                         for (i = 0; i < brd->info->nports; i++)
2790                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2791                                                 NULL);
2792
2793                         m++;
2794                 }
2795
2796         retval = pci_register_driver(&mxser_driver);
2797         if (retval) {
2798                 printk(KERN_ERR "Can't register pci driver\n");
2799                 if (!m) {
2800                         retval = -ENODEV;
2801                         goto err_unr;
2802                 } /* else: we have some ISA cards under control */
2803         }
2804
2805         pr_debug("Done.\n");
2806
2807         return 0;
2808 err_unr:
2809         tty_unregister_driver(mxvar_sdriver);
2810 err_put:
2811         put_tty_driver(mxvar_sdriver);
2812         return retval;
2813 }
2814
2815 static void __exit mxser_module_exit(void)
2816 {
2817         unsigned int i, j;
2818
2819         pr_debug("Unloading module mxser ...\n");
2820
2821         pci_unregister_driver(&mxser_driver);
2822
2823         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2824                 if (mxser_boards[i].info != NULL)
2825                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2826                                 tty_unregister_device(mxvar_sdriver,
2827                                                 mxser_boards[i].idx + j);
2828         tty_unregister_driver(mxvar_sdriver);
2829         put_tty_driver(mxvar_sdriver);
2830
2831         for (i = 0; i < MXSER_BOARDS; i++)
2832                 if (mxser_boards[i].info != NULL)
2833                         mxser_release_res(&mxser_boards[i], NULL, 1);
2834
2835         pr_debug("Done.\n");
2836 }
2837
2838 module_init(mxser_module_init);
2839 module_exit(mxser_module_exit);