drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com).
   5  *      Copyright (C) 2006-2008  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/errno.h>
  24 #include <linux/signal.h>
  25 #include <linux/sched.h>
  26 #include <linux/timer.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/tty.h>
  29 #include <linux/tty_flip.h>
  30 #include <linux/serial.h>
  31 #include <linux/serial_reg.h>
  32 #include <linux/major.h>
  33 #include <linux/string.h>
  34 #include <linux/fcntl.h>
  35 #include <linux/ptrace.h>
  36 #include <linux/gfp.h>
  37 #include <linux/ioport.h>
  38 #include <linux/mm.h>
  39 #include <linux/delay.h>
  40 #include <linux/pci.h>
  41 #include <linux/bitops.h>
  42
  43 #include <asm/system.h>
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/uaccess.h>
  47
  48 #include "mxser.h"
  49
  50 #define MXSER_VERSION   "2.0.3"         /* 1.11 */
  51 #define MXSERMAJOR       174
  52 #define MXSERCUMAJOR     175
  53
  54 #define MXSER_BOARDS            4       /* Max. boards */
  55 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  56 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  57 #define MXSER_ISR_PASS_LIMIT    100
  58
  59 #define MXSER_ERR_IOADDR        -1
  60 #define MXSER_ERR_IRQ           -2
  61 #define MXSER_ERR_IRQ_CONFLIT   -3
  62 #define MXSER_ERR_VECTOR        -4
  63
  64 /*CheckIsMoxaMust return value*/
  65 #define MOXA_OTHER_UART         0x00
  66 #define MOXA_MUST_MU150_HWID    0x01
  67 #define MOXA_MUST_MU860_HWID    0x02
  68
  69 #define WAKEUP_CHARS            256
  70
  71 #define UART_MCR_AFE            0x20
  72 #define UART_LSR_SPECIAL        0x1E
  73
  74 #define PCI_DEVICE_ID_CB108     0x1080
  75 #define PCI_DEVICE_ID_CB114     0x1142
  76 #define PCI_DEVICE_ID_CP114UL   0x1143
  77 #define PCI_DEVICE_ID_CB134I    0x1341
  78 #define PCI_DEVICE_ID_CP138U    0x1380
  79 #define PCI_DEVICE_ID_POS104UL  0x1044
  80
  81
  82 #define C168_ASIC_ID    1
  83 #define C104_ASIC_ID    2
  84 #define C102_ASIC_ID    0xB
  85 #define CI132_ASIC_ID   4
  86 #define CI134_ASIC_ID   3
  87 #define CI104J_ASIC_ID  5
  88
  89 #define MXSER_HIGHBAUD  1
  90 #define MXSER_HAS2      2
  91
  92 /* This is only for PCI */
  93 static const struct {
  94         int type;
  95         int tx_fifo;
  96         int rx_fifo;
  97         int xmit_fifo_size;
  98         int rx_high_water;
  99         int rx_trigger;
 100         int rx_low_water;
 101         long max_baud;
 102 } Gpci_uart_info[] = {
 103         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 104         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 105         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 106 };
 107 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 108
 109 struct mxser_cardinfo {
 110         char *name;
 111         unsigned int nports;
 112         unsigned int flags;
 113 };
 114
 115 static const struct mxser_cardinfo mxser_cards[] = {
 116 /* 0*/  { "C168 series",        8, },
 117         { "C104 series",        4, },
 118         { "CI-104J series",     4, },
 119         { "C168H/PCI series",   8, },
 120         { "C104H/PCI series",   4, },
 121 /* 5*/  { "C102 series",        4, MXSER_HAS2 },        /* C102-ISA */
 122         { "CI-132 series",      4, MXSER_HAS2 },
 123         { "CI-134 series",      4, },
 124         { "CP-132 series",      2, },
 125         { "CP-114 series",      4, },
 126 /*10*/  { "CT-114 series",      4, },
 127         { "CP-102 series",      2, MXSER_HIGHBAUD },
 128         { "CP-104U series",     4, },
 129         { "CP-168U series",     8, },
 130         { "CP-132U series",     2, },
 131 /*15*/  { "CP-134U series",     4, },
 132         { "CP-104JU series",    4, },
 133         { "Moxa UC7000 Serial", 8, },           /* RC7000 */
 134         { "CP-118U series",     8, },
 135         { "CP-102UL series",    2, },
 136 /*20*/  { "CP-102U series",     2, },
 137         { "CP-118EL series",    8, },
 138         { "CP-168EL series",    8, },
 139         { "CP-104EL series",    4, },
 140         { "CB-108 series",      8, },
 141 /*25*/  { "CB-114 series",      4, },
 142         { "CB-134I series",     4, },
 143         { "CP-138U series",     8, },
 144         { "POS-104UL series",   4, },
 145         { "CP-114UL series",    4, }
 146 };
 147
 148 /* driver_data correspond to the lines in the structure above
 149    see also ISA probe function before you change something */
 150 static struct pci_device_id mxser_pcibrds[] = {
 151         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168),   .driver_data = 3 },
 152         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104),   .driver_data = 4 },
 153         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132),  .driver_data = 8 },
 154         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114),  .driver_data = 9 },
 155         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114),  .driver_data = 10 },
 156         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102),  .driver_data = 11 },
 157         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
 158         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
 159         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
 160         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
 161         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
 162         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
 163         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
 164         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
 165         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
 166         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
 167         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
 168         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
 169         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108),       .driver_data = 24 },
 170         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114),       .driver_data = 25 },
 171         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I),      .driver_data = 26 },
 172         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U),      .driver_data = 27 },
 173         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL),    .driver_data = 28 },
 174         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL),     .driver_data = 29 },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 178
 179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 180 static int ttymajor = MXSERMAJOR;
 181
 182 /* Variables for insmod */
 183
 184 MODULE_AUTHOR("Casper Yang");
 185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 186 module_param_array(ioaddr, int, NULL, 0);
 187 module_param(ttymajor, int, 0);
 188 MODULE_LICENSE("GPL");
 189
 190 struct mxser_log {
 191         int tick;
 192         unsigned long rxcnt[MXSER_PORTS];
 193         unsigned long txcnt[MXSER_PORTS];
 194 };
 195
 196
 197 struct mxser_mon {
 198         unsigned long rxcnt;
 199         unsigned long txcnt;
 200         unsigned long up_rxcnt;
 201         unsigned long up_txcnt;
 202         int modem_status;
 203         unsigned char hold_reason;
 204 };
 205
 206 struct mxser_mon_ext {
 207         unsigned long rx_cnt[32];
 208         unsigned long tx_cnt[32];
 209         unsigned long up_rxcnt[32];
 210         unsigned long up_txcnt[32];
 211         int modem_status[32];
 212
 213         long baudrate[32];
 214         int databits[32];
 215         int stopbits[32];
 216         int parity[32];
 217         int flowctrl[32];
 218         int fifo[32];
 219         int iftype[32];
 220 };
 221
 222 struct mxser_board;
 223
 224 struct mxser_port {
 225         struct mxser_board *board;
 226         struct tty_struct *tty;
 227
 228         unsigned long ioaddr;
 229         unsigned long opmode_ioaddr;
 230         int max_baud;
 231
 232         int rx_high_water;
 233         int rx_trigger;         /* Rx fifo trigger level */
 234         int rx_low_water;
 235         int baud_base;          /* max. speed */
 236         int type;               /* UART type */
 237         int flags;              /* defined in tty.h */
 238
 239         int x_char;             /* xon/xoff character */
 240         int IER;                /* Interrupt Enable Register */
 241         int MCR;                /* Modem control register */
 242
 243         unsigned char stop_rx;
 244         unsigned char ldisc_stop_rx;
 245
 246         int custom_divisor;
 247         int close_delay;
 248         unsigned short closing_wait;
 249         unsigned char err_shadow;
 250         unsigned long event;
 251
 252         int count;              /* # of fd on device */
 253         int blocked_open;       /* # of blocked opens */
 254         struct async_icount icount; /* kernel counters for 4 input interrupts */
 255         int timeout;
 256
 257         int read_status_mask;
 258         int ignore_status_mask;
 259         int xmit_fifo_size;
 260         unsigned char *xmit_buf;
 261         int xmit_head;
 262         int xmit_tail;
 263         int xmit_cnt;
 264
 265         struct ktermios normal_termios;
 266
 267         struct mxser_mon mon_data;
 268
 269         spinlock_t slock;
 270         wait_queue_head_t open_wait;
 271         wait_queue_head_t delta_msr_wait;
 272 };
 273
 274 struct mxser_board {
 275         unsigned int idx;
 276         int irq;
 277         const struct mxser_cardinfo *info;
 278         unsigned long vector;
 279         unsigned long vector_mask;
 280
 281         int chip_flag;
 282         int uart_type;
 283
 284         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 285 };
 286
 287 struct mxser_mstatus {
 288         tcflag_t cflag;
 289         int cts;
 290         int dsr;
 291         int ri;
 292         int dcd;
 293 };
 294
 295 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 296
 297 static int mxserBoardCAP[MXSER_BOARDS] = {
 298         0, 0, 0, 0
 299         /*  0x180, 0x280, 0x200, 0x320 */
 300 };
 301
 302 static struct mxser_board mxser_boards[MXSER_BOARDS];
 303 static struct tty_driver *mxvar_sdriver;
 304 static struct mxser_log mxvar_log;
 305 static int mxvar_diagflag;
 306 static unsigned char mxser_msr[MXSER_PORTS + 1];
 307 static struct mxser_mon_ext mon_data_ext;
 308 static int mxser_set_baud_method[MXSER_PORTS + 1];
 309
 310 #ifdef CONFIG_PCI
 311 static int __devinit CheckIsMoxaMust(unsigned long io)
 312 {
 313         u8 oldmcr, hwid;
 314         int i;
 315
 316         outb(0, io + UART_LCR);
 317         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 318         oldmcr = inb(io + UART_MCR);
 319         outb(0, io + UART_MCR);
 320         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 321         if ((hwid = inb(io + UART_MCR)) != 0) {
 322                 outb(oldmcr, io + UART_MCR);
 323                 return MOXA_OTHER_UART;
 324         }
 325
 326         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 327         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 328                 if (hwid == Gpci_uart_info[i].type)
 329                         return (int)hwid;
 330         }
 331         return MOXA_OTHER_UART;
 332 }
 333 #endif
 334
 335 static void process_txrx_fifo(struct mxser_port *info)
 336 {
 337         int i;
 338
 339         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 340                 info->rx_trigger = 1;
 341                 info->rx_high_water = 1;
 342                 info->rx_low_water = 1;
 343                 info->xmit_fifo_size = 1;
 344         } else
 345                 for (i = 0; i < UART_INFO_NUM; i++)
 346                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 347                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 348                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 349                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 350                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 351                                 break;
 352                         }
 353 }
 354
 355 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 356 {
 357         unsigned char status = 0;
 358
 359         status = inb(baseaddr + UART_MSR);
 360
 361         mxser_msr[port] &= 0x0F;
 362         mxser_msr[port] |= status;
 363         status = mxser_msr[port];
 364         if (mode)
 365                 mxser_msr[port] = 0;
 366
 367         return status;
 368 }
 369
 370 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 371                 struct mxser_port *port)
 372 {
 373         DECLARE_WAITQUEUE(wait, current);
 374         int retval;
 375         int do_clocal = 0;
 376         unsigned long flags;
 377
 378         /*
 379          * If non-blocking mode is set, or the port is not enabled,
 380          * then make the check up front and then exit.
 381          */
 382         if ((filp->f_flags & O_NONBLOCK) ||
 383                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 384                 port->flags |= ASYNC_NORMAL_ACTIVE;
 385                 return 0;
 386         }
 387
 388         if (tty->termios->c_cflag & CLOCAL)
 389                 do_clocal = 1;
 390
 391         /*
 392          * Block waiting for the carrier detect and the line to become
 393          * free (i.e., not in use by the callout).  While we are in
 394          * this loop, port->count is dropped by one, so that
 395          * mxser_close() knows when to free things.  We restore it upon
 396          * exit, either normal or abnormal.
 397          */
 398         retval = 0;
 399         add_wait_queue(&port->open_wait, &wait);
 400
 401         spin_lock_irqsave(&port->slock, flags);
 402         if (!tty_hung_up_p(filp))
 403                 port->count--;
 404         spin_unlock_irqrestore(&port->slock, flags);
 405         port->blocked_open++;
 406         while (1) {
 407                 spin_lock_irqsave(&port->slock, flags);
 408                 outb(inb(port->ioaddr + UART_MCR) |
 409                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 410                 spin_unlock_irqrestore(&port->slock, flags);
 411                 set_current_state(TASK_INTERRUPTIBLE);
 412                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 413                         if (port->flags & ASYNC_HUP_NOTIFY)
 414                                 retval = -EAGAIN;
 415                         else
 416                                 retval = -ERESTARTSYS;
 417                         break;
 418                 }
 419                 if (!(port->flags & ASYNC_CLOSING) &&
 420                                 (do_clocal ||
 421                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 422                         break;
 423                 if (signal_pending(current)) {
 424                         retval = -ERESTARTSYS;
 425                         break;
 426                 }
 427                 schedule();
 428         }
 429         set_current_state(TASK_RUNNING);
 430         remove_wait_queue(&port->open_wait, &wait);
 431         if (!tty_hung_up_p(filp))
 432                 port->count++;
 433         port->blocked_open--;
 434         if (retval)
 435                 return retval;
 436         port->flags |= ASYNC_NORMAL_ACTIVE;
 437         return 0;
 438 }
 439
 440 static int mxser_set_baud(struct mxser_port *info, long newspd)
 441 {
 442         int quot = 0, baud;
 443         unsigned char cval;
 444
 445         if (!info->tty || !info->tty->termios)
 446                 return -1;
 447
 448         if (!(info->ioaddr))
 449                 return -1;
 450
 451         if (newspd > info->max_baud)
 452                 return -1;
 453
 454         if (newspd == 134) {
 455                 quot = 2 * info->baud_base / 269;
 456                 tty_encode_baud_rate(info->tty, 134, 134);
 457         } else if (newspd) {
 458                 quot = info->baud_base / newspd;
 459                 if (quot == 0)
 460                         quot = 1;
 461                 baud = info->baud_base/quot;
 462                 tty_encode_baud_rate(info->tty, baud, baud);
 463         } else {
 464                 quot = 0;
 465         }
 466
 467         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 468         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 469
 470         if (quot) {
 471                 info->MCR |= UART_MCR_DTR;
 472                 outb(info->MCR, info->ioaddr + UART_MCR);
 473         } else {
 474                 info->MCR &= ~UART_MCR_DTR;
 475                 outb(info->MCR, info->ioaddr + UART_MCR);
 476                 return 0;
 477         }
 478
 479         cval = inb(info->ioaddr + UART_LCR);
 480
 481         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 482
 483         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 484         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 485         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 486
 487 #ifdef BOTHER
 488         if (C_BAUD(info->tty) == BOTHER) {
 489                 quot = info->baud_base % newspd;
 490                 quot *= 8;
 491                 if (quot % newspd > newspd / 2) {
 492                         quot /= newspd;
 493                         quot++;
 494                 } else
 495                         quot /= newspd;
 496
 497                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 498         } else
 499 #endif
 500                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 501
 502         return 0;
 503 }
 504
 505 /*
 506  * This routine is called to set the UART divisor registers to match
 507  * the specified baud rate for a serial port.
 508  */
 509 static int mxser_change_speed(struct mxser_port *info,
 510                 struct ktermios *old_termios)
 511 {
 512         unsigned cflag, cval, fcr;
 513         int ret = 0;
 514         unsigned char status;
 515
 516         if (!info->tty || !info->tty->termios)
 517                 return ret;
 518         cflag = info->tty->termios->c_cflag;
 519         if (!(info->ioaddr))
 520                 return ret;
 521
 522         if (mxser_set_baud_method[info->tty->index] == 0)
 523                 mxser_set_baud(info, tty_get_baud_rate(info->tty));
 524
 525         /* byte size and parity */
 526         switch (cflag & CSIZE) {
 527         case CS5:
 528                 cval = 0x00;
 529                 break;
 530         case CS6:
 531                 cval = 0x01;
 532                 break;
 533         case CS7:
 534                 cval = 0x02;
 535                 break;
 536         case CS8:
 537                 cval = 0x03;
 538                 break;
 539         default:
 540                 cval = 0x00;
 541                 break;          /* too keep GCC shut... */
 542         }
 543         if (cflag & CSTOPB)
 544                 cval |= 0x04;
 545         if (cflag & PARENB)
 546                 cval |= UART_LCR_PARITY;
 547         if (!(cflag & PARODD))
 548                 cval |= UART_LCR_EPAR;
 549         if (cflag & CMSPAR)
 550                 cval |= UART_LCR_SPAR;
 551
 552         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 553                 if (info->board->chip_flag) {
 554                         fcr = UART_FCR_ENABLE_FIFO;
 555                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 556                         SET_MOXA_MUST_FIFO_VALUE(info);
 557                 } else
 558                         fcr = 0;
 559         } else {
 560                 fcr = UART_FCR_ENABLE_FIFO;
 561                 if (info->board->chip_flag) {
 562                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 563                         SET_MOXA_MUST_FIFO_VALUE(info);
 564                 } else {
 565                         switch (info->rx_trigger) {
 566                         case 1:
 567                                 fcr |= UART_FCR_TRIGGER_1;
 568                                 break;
 569                         case 4:
 570                                 fcr |= UART_FCR_TRIGGER_4;
 571                                 break;
 572                         case 8:
 573                                 fcr |= UART_FCR_TRIGGER_8;
 574                                 break;
 575                         default:
 576                                 fcr |= UART_FCR_TRIGGER_14;
 577                                 break;
 578                         }
 579                 }
 580         }
 581
 582         /* CTS flow control flag and modem status interrupts */
 583         info->IER &= ~UART_IER_MSI;
 584         info->MCR &= ~UART_MCR_AFE;
 585         if (cflag & CRTSCTS) {
 586                 info->flags |= ASYNC_CTS_FLOW;
 587                 info->IER |= UART_IER_MSI;
 588                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 589                         info->MCR |= UART_MCR_AFE;
 590                 } else {
 591                         status = inb(info->ioaddr + UART_MSR);
 592                         if (info->tty->hw_stopped) {
 593                                 if (status & UART_MSR_CTS) {
 594                                         info->tty->hw_stopped = 0;
 595                                         if (info->type != PORT_16550A &&
 596                                                         !info->board->chip_flag) {
 597                                                 outb(info->IER & ~UART_IER_THRI,
 598                                                         info->ioaddr +
 599                                                         UART_IER);
 600                                                 info->IER |= UART_IER_THRI;
 601                                                 outb(info->IER, info->ioaddr +
 602                                                                 UART_IER);
 603                                         }
 604                                         tty_wakeup(info->tty);
 605                                 }
 606                         } else {
 607                                 if (!(status & UART_MSR_CTS)) {
 608                                         info->tty->hw_stopped = 1;
 609                                         if ((info->type != PORT_16550A) &&
 610                                                         (!info->board->chip_flag)) {
 611                                                 info->IER &= ~UART_IER_THRI;
 612                                                 outb(info->IER, info->ioaddr +
 613                                                                 UART_IER);
 614                                         }
 615                                 }
 616                         }
 617                 }
 618         } else {
 619                 info->flags &= ~ASYNC_CTS_FLOW;
 620         }
 621         outb(info->MCR, info->ioaddr + UART_MCR);
 622         if (cflag & CLOCAL) {
 623                 info->flags &= ~ASYNC_CHECK_CD;
 624         } else {
 625                 info->flags |= ASYNC_CHECK_CD;
 626                 info->IER |= UART_IER_MSI;
 627         }
 628         outb(info->IER, info->ioaddr + UART_IER);
 629
 630         /*
 631          * Set up parity check flag
 632          */
 633         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 634         if (I_INPCK(info->tty))
 635                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 636         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 637                 info->read_status_mask |= UART_LSR_BI;
 638
 639         info->ignore_status_mask = 0;
 640
 641         if (I_IGNBRK(info->tty)) {
 642                 info->ignore_status_mask |= UART_LSR_BI;
 643                 info->read_status_mask |= UART_LSR_BI;
 644                 /*
 645                  * If we're ignore parity and break indicators, ignore
 646                  * overruns too.  (For real raw support).
 647                  */
 648                 if (I_IGNPAR(info->tty)) {
 649                         info->ignore_status_mask |=
 650                                                 UART_LSR_OE |
 651                                                 UART_LSR_PE |
 652                                                 UART_LSR_FE;
 653                         info->read_status_mask |=
 654                                                 UART_LSR_OE |
 655                                                 UART_LSR_PE |
 656                                                 UART_LSR_FE;
 657                 }
 658         }
 659         if (info->board->chip_flag) {
 660                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 661                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 662                 if (I_IXON(info->tty)) {
 663                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 664                 } else {
 665                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 666                 }
 667                 if (I_IXOFF(info->tty)) {
 668                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 669                 } else {
 670                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 671                 }
 672         }
 673
 674
 675         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 676         outb(cval, info->ioaddr + UART_LCR);
 677
 678         return ret;
 679 }
 680
 681 static void mxser_check_modem_status(struct mxser_port *port, int status)
 682 {
 683         /* update input line counters */
 684         if (status & UART_MSR_TERI)
 685                 port->icount.rng++;
 686         if (status & UART_MSR_DDSR)
 687                 port->icount.dsr++;
 688         if (status & UART_MSR_DDCD)
 689                 port->icount.dcd++;
 690         if (status & UART_MSR_DCTS)
 691                 port->icount.cts++;
 692         port->mon_data.modem_status = status;
 693         wake_up_interruptible(&port->delta_msr_wait);
 694
 695         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 696                 if (status & UART_MSR_DCD)
 697                         wake_up_interruptible(&port->open_wait);
 698         }
 699
 700         if (port->flags & ASYNC_CTS_FLOW) {
 701                 if (port->tty->hw_stopped) {
 702                         if (status & UART_MSR_CTS) {
 703                                 port->tty->hw_stopped = 0;
 704
 705                                 if ((port->type != PORT_16550A) &&
 706                                                 (!port->board->chip_flag)) {
 707                                         outb(port->IER & ~UART_IER_THRI,
 708                                                 port->ioaddr + UART_IER);
 709                                         port->IER |= UART_IER_THRI;
 710                                         outb(port->IER, port->ioaddr +
 711                                                         UART_IER);
 712                                 }
 713                                 tty_wakeup(port->tty);
 714                         }
 715                 } else {
 716                         if (!(status & UART_MSR_CTS)) {
 717                                 port->tty->hw_stopped = 1;
 718                                 if (port->type != PORT_16550A &&
 719                                                 !port->board->chip_flag) {
 720                                         port->IER &= ~UART_IER_THRI;
 721                                         outb(port->IER, port->ioaddr +
 722                                                         UART_IER);
 723                                 }
 724                         }
 725                 }
 726         }
 727 }
 728
 729 static int mxser_startup(struct mxser_port *info)
 730 {
 731         unsigned long page;
 732         unsigned long flags;
 733
 734         page = __get_free_page(GFP_KERNEL);
 735         if (!page)
 736                 return -ENOMEM;
 737
 738         spin_lock_irqsave(&info->slock, flags);
 739
 740         if (info->flags & ASYNC_INITIALIZED) {
 741                 free_page(page);
 742                 spin_unlock_irqrestore(&info->slock, flags);
 743                 return 0;
 744         }
 745
 746         if (!info->ioaddr || !info->type) {
 747                 if (info->tty)
 748                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 749                 free_page(page);
 750                 spin_unlock_irqrestore(&info->slock, flags);
 751                 return 0;
 752         }
 753         if (info->xmit_buf)
 754                 free_page(page);
 755         else
 756                 info->xmit_buf = (unsigned char *) page;
 757
 758         /*
 759          * Clear the FIFO buffers and disable them
 760          * (they will be reenabled in mxser_change_speed())
 761          */
 762         if (info->board->chip_flag)
 763                 outb((UART_FCR_CLEAR_RCVR |
 764                         UART_FCR_CLEAR_XMIT |
 765                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 766         else
 767                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 768                         info->ioaddr + UART_FCR);
 769
 770         /*
 771          * At this point there's no way the LSR could still be 0xFF;
 772          * if it is, then bail out, because there's likely no UART
 773          * here.
 774          */
 775         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 776                 spin_unlock_irqrestore(&info->slock, flags);
 777                 if (capable(CAP_SYS_ADMIN)) {
 778                         if (info->tty)
 779                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 780                         return 0;
 781                 } else
 782                         return -ENODEV;
 783         }
 784
 785         /*
 786          * Clear the interrupt registers.
 787          */
 788         (void) inb(info->ioaddr + UART_LSR);
 789         (void) inb(info->ioaddr + UART_RX);
 790         (void) inb(info->ioaddr + UART_IIR);
 791         (void) inb(info->ioaddr + UART_MSR);
 792
 793         /*
 794          * Now, initialize the UART
 795          */
 796         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 797         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 798         outb(info->MCR, info->ioaddr + UART_MCR);
 799
 800         /*
 801          * Finally, enable interrupts
 802          */
 803         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 804
 805         if (info->board->chip_flag)
 806                 info->IER |= MOXA_MUST_IER_EGDAI;
 807         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 808
 809         /*
 810          * And clear the interrupt registers again for luck.
 811          */
 812         (void) inb(info->ioaddr + UART_LSR);
 813         (void) inb(info->ioaddr + UART_RX);
 814         (void) inb(info->ioaddr + UART_IIR);
 815         (void) inb(info->ioaddr + UART_MSR);
 816
 817         if (info->tty)
 818                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 819         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 820
 821         /*
 822          * and set the speed of the serial port
 823          */
 824         mxser_change_speed(info, NULL);
 825         info->flags |= ASYNC_INITIALIZED;
 826         spin_unlock_irqrestore(&info->slock, flags);
 827
 828         return 0;
 829 }
 830
 831 /*
 832  * This routine will shutdown a serial port; interrupts maybe disabled, and
 833  * DTR is dropped if the hangup on close termio flag is on.
 834  */
 835 static void mxser_shutdown(struct mxser_port *info)
 836 {
 837         unsigned long flags;
 838
 839         if (!(info->flags & ASYNC_INITIALIZED))
 840                 return;
 841
 842         spin_lock_irqsave(&info->slock, flags);
 843
 844         /*
 845          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 846          * here so the queue might never be waken up
 847          */
 848         wake_up_interruptible(&info->delta_msr_wait);
 849
 850         /*
 851          * Free the IRQ, if necessary
 852          */
 853         if (info->xmit_buf) {
 854                 free_page((unsigned long) info->xmit_buf);
 855                 info->xmit_buf = NULL;
 856         }
 857
 858         info->IER = 0;
 859         outb(0x00, info->ioaddr + UART_IER);
 860
 861         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 862                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 863         outb(info->MCR, info->ioaddr + UART_MCR);
 864
 865         /* clear Rx/Tx FIFO's */
 866         if (info->board->chip_flag)
 867                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 868                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 869                                 info->ioaddr + UART_FCR);
 870         else
 871                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 872                         info->ioaddr + UART_FCR);
 873
 874         /* read data port to reset things */
 875         (void) inb(info->ioaddr + UART_RX);
 876
 877         if (info->tty)
 878                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 879
 880         info->flags &= ~ASYNC_INITIALIZED;
 881
 882         if (info->board->chip_flag)
 883                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 884
 885         spin_unlock_irqrestore(&info->slock, flags);
 886 }
 887
 888 /*
 889  * This routine is called whenever a serial port is opened.  It
 890  * enables interrupts for a serial port, linking in its async structure into
 891  * the IRQ chain.   It also performs the serial-specific
 892  * initialization for the tty structure.
 893  */
 894 static int mxser_open(struct tty_struct *tty, struct file *filp)
 895 {
 896         struct mxser_port *info;
 897         unsigned long flags;
 898         int retval, line;
 899
 900         line = tty->index;
 901         if (line == MXSER_PORTS)
 902                 return 0;
 903         if (line < 0 || line > MXSER_PORTS)
 904                 return -ENODEV;
 905         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 906         if (!info->ioaddr)
 907                 return -ENODEV;
 908
 909         tty->driver_data = info;
 910         info->tty = tty;
 911         /*
 912          * Start up serial port
 913          */
 914         spin_lock_irqsave(&info->slock, flags);
 915         info->count++;
 916         spin_unlock_irqrestore(&info->slock, flags);
 917         retval = mxser_startup(info);
 918         if (retval)
 919                 return retval;
 920
 921         retval = mxser_block_til_ready(tty, filp, info);
 922         if (retval)
 923                 return retval;
 924
 925         /* unmark here for very high baud rate (ex. 921600 bps) used */
 926         tty->low_latency = 1;
 927         return 0;
 928 }
 929
 930 static void mxser_flush_buffer(struct tty_struct *tty)
 931 {
 932         struct mxser_port *info = tty->driver_data;
 933         char fcr;
 934         unsigned long flags;
 935
 936
 937         spin_lock_irqsave(&info->slock, flags);
 938         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 939
 940         fcr = inb(info->ioaddr + UART_FCR);
 941         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 942                 info->ioaddr + UART_FCR);
 943         outb(fcr, info->ioaddr + UART_FCR);
 944
 945         spin_unlock_irqrestore(&info->slock, flags);
 946
 947         tty_wakeup(tty);
 948 }
 949
 950
 951 /*
 952  * This routine is called when the serial port gets closed.  First, we
 953  * wait for the last remaining data to be sent.  Then, we unlink its
 954  * async structure from the interrupt chain if necessary, and we free
 955  * that IRQ if nothing is left in the chain.
 956  */
 957 static void mxser_close(struct tty_struct *tty, struct file *filp)
 958 {
 959         struct mxser_port *info = tty->driver_data;
 960
 961         unsigned long timeout;
 962         unsigned long flags;
 963
 964         if (tty->index == MXSER_PORTS)
 965                 return;
 966         if (!info)
 967                 return;
 968
 969         spin_lock_irqsave(&info->slock, flags);
 970
 971         if (tty_hung_up_p(filp)) {
 972                 spin_unlock_irqrestore(&info->slock, flags);
 973                 return;
 974         }
 975         if ((tty->count == 1) && (info->count != 1)) {
 976                 /*
 977                  * Uh, oh.  tty->count is 1, which means that the tty
 978                  * structure will be freed.  Info->count should always
 979                  * be one in these conditions.  If it's greater than
 980                  * one, we've got real problems, since it means the
 981                  * serial port won't be shutdown.
 982                  */
 983                 printk(KERN_ERR "mxser_close: bad serial port count; "
 984                         "tty->count is 1, info->count is %d\n", info->count);
 985                 info->count = 1;
 986         }
 987         if (--info->count < 0) {
 988                 printk(KERN_ERR "mxser_close: bad serial port count for "
 989                         "ttys%d: %d\n", tty->index, info->count);
 990                 info->count = 0;
 991         }
 992         if (info->count) {
 993                 spin_unlock_irqrestore(&info->slock, flags);
 994                 return;
 995         }
 996         info->flags |= ASYNC_CLOSING;
 997         spin_unlock_irqrestore(&info->slock, flags);
 998         /*
 999          * Save the termios structure, since this port may have
1000          * separate termios for callout and dialin.
1001          */
1002         if (info->flags & ASYNC_NORMAL_ACTIVE)
1003                 info->normal_termios = *tty->termios;
1004         /*
1005          * Now we wait for the transmit buffer to clear; and we notify
1006          * the line discipline to only process XON/XOFF characters.
1007          */
1008         tty->closing = 1;
1009         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1010                 tty_wait_until_sent(tty, info->closing_wait);
1011         /*
1012          * At this point we stop accepting input.  To do this, we
1013          * disable the receive line status interrupts, and tell the
1014          * interrupt driver to stop checking the data ready bit in the
1015          * line status register.
1016          */
1017         info->IER &= ~UART_IER_RLSI;
1018         if (info->board->chip_flag)
1019                 info->IER &= ~MOXA_MUST_RECV_ISR;
1020
1021         if (info->flags & ASYNC_INITIALIZED) {
1022                 outb(info->IER, info->ioaddr + UART_IER);
1023                 /*
1024                  * Before we drop DTR, make sure the UART transmitter
1025                  * has completely drained; this is especially
1026                  * important if there is a transmit FIFO!
1027                  */
1028                 timeout = jiffies + HZ;
1029                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1030                         schedule_timeout_interruptible(5);
1031                         if (time_after(jiffies, timeout))
1032                                 break;
1033                 }
1034         }
1035         mxser_shutdown(info);
1036
1037         mxser_flush_buffer(tty);
1038         tty_ldisc_flush(tty);
1039
1040         tty->closing = 0;
1041         info->event = 0;
1042         info->tty = NULL;
1043         if (info->blocked_open) {
1044                 if (info->close_delay)
1045                         schedule_timeout_interruptible(info->close_delay);
1046                 wake_up_interruptible(&info->open_wait);
1047         }
1048
1049         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1050 }
1051
1052 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1053 {
1054         int c, total = 0;
1055         struct mxser_port *info = tty->driver_data;
1056         unsigned long flags;
1057
1058         if (!info->xmit_buf)
1059                 return 0;
1060
1061         while (1) {
1062                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1063                                           SERIAL_XMIT_SIZE - info->xmit_head));
1064                 if (c <= 0)
1065                         break;
1066
1067                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1068                 spin_lock_irqsave(&info->slock, flags);
1069                 info->xmit_head = (info->xmit_head + c) &
1070                                   (SERIAL_XMIT_SIZE - 1);
1071                 info->xmit_cnt += c;
1072                 spin_unlock_irqrestore(&info->slock, flags);
1073
1074                 buf += c;
1075                 count -= c;
1076                 total += c;
1077         }
1078
1079         if (info->xmit_cnt && !tty->stopped) {
1080                 if (!tty->hw_stopped ||
1081                                 (info->type == PORT_16550A) ||
1082                                 (info->board->chip_flag)) {
1083                         spin_lock_irqsave(&info->slock, flags);
1084                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1085                                         UART_IER);
1086                         info->IER |= UART_IER_THRI;
1087                         outb(info->IER, info->ioaddr + UART_IER);
1088                         spin_unlock_irqrestore(&info->slock, flags);
1089                 }
1090         }
1091         return total;
1092 }
1093
1094 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1095 {
1096         struct mxser_port *info = tty->driver_data;
1097         unsigned long flags;
1098
1099         if (!info->xmit_buf)
1100                 return 0;
1101
1102         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1103                 return 0;
1104
1105         spin_lock_irqsave(&info->slock, flags);
1106         info->xmit_buf[info->xmit_head++] = ch;
1107         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1108         info->xmit_cnt++;
1109         spin_unlock_irqrestore(&info->slock, flags);
1110         if (!tty->stopped) {
1111                 if (!tty->hw_stopped ||
1112                                 (info->type == PORT_16550A) ||
1113                                 info->board->chip_flag) {
1114                         spin_lock_irqsave(&info->slock, flags);
1115                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1116                         info->IER |= UART_IER_THRI;
1117                         outb(info->IER, info->ioaddr + UART_IER);
1118                         spin_unlock_irqrestore(&info->slock, flags);
1119                 }
1120         }
1121         return 1;
1122 }
1123
1124
1125 static void mxser_flush_chars(struct tty_struct *tty)
1126 {
1127         struct mxser_port *info = tty->driver_data;
1128         unsigned long flags;
1129
1130         if (info->xmit_cnt <= 0 ||
1131                         tty->stopped ||
1132                         !info->xmit_buf ||
1133                         (tty->hw_stopped &&
1134                          (info->type != PORT_16550A) &&
1135                          (!info->board->chip_flag)
1136                         ))
1137                 return;
1138
1139         spin_lock_irqsave(&info->slock, flags);
1140
1141         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1142         info->IER |= UART_IER_THRI;
1143         outb(info->IER, info->ioaddr + UART_IER);
1144
1145         spin_unlock_irqrestore(&info->slock, flags);
1146 }
1147
1148 static int mxser_write_room(struct tty_struct *tty)
1149 {
1150         struct mxser_port *info = tty->driver_data;
1151         int ret;
1152
1153         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1154         if (ret < 0)
1155                 ret = 0;
1156         return ret;
1157 }
1158
1159 static int mxser_chars_in_buffer(struct tty_struct *tty)
1160 {
1161         struct mxser_port *info = tty->driver_data;
1162         return info->xmit_cnt;
1163 }
1164
1165 /*
1166  * ------------------------------------------------------------
1167  * friends of mxser_ioctl()
1168  * ------------------------------------------------------------
1169  */
1170 static int mxser_get_serial_info(struct mxser_port *info,
1171                 struct serial_struct __user *retinfo)
1172 {
1173         struct serial_struct tmp = {
1174                 .type = info->type,
1175                 .line = info->tty->index,
1176                 .port = info->ioaddr,
1177                 .irq = info->board->irq,
1178                 .flags = info->flags,
1179                 .baud_base = info->baud_base,
1180                 .close_delay = info->close_delay,
1181                 .closing_wait = info->closing_wait,
1182                 .custom_divisor = info->custom_divisor,
1183                 .hub6 = 0
1184         };
1185         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1186                 return -EFAULT;
1187         return 0;
1188 }
1189
1190 static int mxser_set_serial_info(struct mxser_port *info,
1191                 struct serial_struct __user *new_info)
1192 {
1193         struct serial_struct new_serial;
1194         speed_t baud;
1195         unsigned long sl_flags;
1196         unsigned int flags;
1197         int retval = 0;
1198
1199         if (!new_info || !info->ioaddr)
1200                 return -ENODEV;
1201         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1202                 return -EFAULT;
1203
1204         if (new_serial.irq != info->board->irq ||
1205                         new_serial.port != info->ioaddr)
1206                 return -EINVAL;
1207
1208         flags = info->flags & ASYNC_SPD_MASK;
1209
1210         if (!capable(CAP_SYS_ADMIN)) {
1211                 if ((new_serial.baud_base != info->baud_base) ||
1212                                 (new_serial.close_delay != info->close_delay) ||
1213                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1214                         return -EPERM;
1215                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1216                                 (new_serial.flags & ASYNC_USR_MASK));
1217         } else {
1218                 /*
1219                  * OK, past this point, all the error checking has been done.
1220                  * At this point, we start making changes.....
1221                  */
1222                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1223                                 (new_serial.flags & ASYNC_FLAGS));
1224                 info->close_delay = new_serial.close_delay * HZ / 100;
1225                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1226                 info->tty->low_latency =
1227                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1228                 info->tty->low_latency = 0;
1229                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1230                                 (new_serial.baud_base != info->baud_base ||
1231                                 new_serial.custom_divisor !=
1232                                 info->custom_divisor)) {
1233                         baud = new_serial.baud_base / new_serial.custom_divisor;
1234                         tty_encode_baud_rate(info->tty, baud, baud);
1235                 }
1236         }
1237
1238         info->type = new_serial.type;
1239
1240         process_txrx_fifo(info);
1241
1242         if (info->flags & ASYNC_INITIALIZED) {
1243                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1244                         spin_lock_irqsave(&info->slock, sl_flags);
1245                         mxser_change_speed(info, NULL);
1246                         spin_unlock_irqrestore(&info->slock, sl_flags);
1247                 }
1248         } else
1249                 retval = mxser_startup(info);
1250
1251         return retval;
1252 }
1253
1254 /*
1255  * mxser_get_lsr_info - get line status register info
1256  *
1257  * Purpose: Let user call ioctl() to get info when the UART physically
1258  *          is emptied.  On bus types like RS485, the transmitter must
1259  *          release the bus after transmitting. This must be done when
1260  *          the transmit shift register is empty, not be done when the
1261  *          transmit holding register is empty.  This functionality
1262  *          allows an RS485 driver to be written in user space.
1263  */
1264 static int mxser_get_lsr_info(struct mxser_port *info,
1265                 unsigned int __user *value)
1266 {
1267         unsigned char status;
1268         unsigned int result;
1269         unsigned long flags;
1270
1271         spin_lock_irqsave(&info->slock, flags);
1272         status = inb(info->ioaddr + UART_LSR);
1273         spin_unlock_irqrestore(&info->slock, flags);
1274         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1275         return put_user(result, value);
1276 }
1277
1278 /*
1279  * This routine sends a break character out the serial port.
1280  */
1281 static void mxser_send_break(struct mxser_port *info, int duration)
1282 {
1283         unsigned long flags;
1284
1285         if (!info->ioaddr)
1286                 return;
1287         set_current_state(TASK_INTERRUPTIBLE);
1288         spin_lock_irqsave(&info->slock, flags);
1289         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1290                 info->ioaddr + UART_LCR);
1291         spin_unlock_irqrestore(&info->slock, flags);
1292         schedule_timeout(duration);
1293         spin_lock_irqsave(&info->slock, flags);
1294         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1295                 info->ioaddr + UART_LCR);
1296         spin_unlock_irqrestore(&info->slock, flags);
1297 }
1298
1299 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1300 {
1301         struct mxser_port *info = tty->driver_data;
1302         unsigned char control, status;
1303         unsigned long flags;
1304
1305
1306         if (tty->index == MXSER_PORTS)
1307                 return -ENOIOCTLCMD;
1308         if (test_bit(TTY_IO_ERROR, &tty->flags))
1309                 return -EIO;
1310
1311         control = info->MCR;
1312
1313         spin_lock_irqsave(&info->slock, flags);
1314         status = inb(info->ioaddr + UART_MSR);
1315         if (status & UART_MSR_ANY_DELTA)
1316                 mxser_check_modem_status(info, status);
1317         spin_unlock_irqrestore(&info->slock, flags);
1318         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1319                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1320                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1321                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1322                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1323                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1324 }
1325
1326 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1327                 unsigned int set, unsigned int clear)
1328 {
1329         struct mxser_port *info = tty->driver_data;
1330         unsigned long flags;
1331
1332
1333         if (tty->index == MXSER_PORTS)
1334                 return -ENOIOCTLCMD;
1335         if (test_bit(TTY_IO_ERROR, &tty->flags))
1336                 return -EIO;
1337
1338         spin_lock_irqsave(&info->slock, flags);
1339
1340         if (set & TIOCM_RTS)
1341                 info->MCR |= UART_MCR_RTS;
1342         if (set & TIOCM_DTR)
1343                 info->MCR |= UART_MCR_DTR;
1344
1345         if (clear & TIOCM_RTS)
1346                 info->MCR &= ~UART_MCR_RTS;
1347         if (clear & TIOCM_DTR)
1348                 info->MCR &= ~UART_MCR_DTR;
1349
1350         outb(info->MCR, info->ioaddr + UART_MCR);
1351         spin_unlock_irqrestore(&info->slock, flags);
1352         return 0;
1353 }
1354
1355 static int __init mxser_program_mode(int port)
1356 {
1357         int id, i, j, n;
1358
1359         outb(0, port);
1360         outb(0, port);
1361         outb(0, port);
1362         (void)inb(port);
1363         (void)inb(port);
1364         outb(0, port);
1365         (void)inb(port);
1366
1367         id = inb(port + 1) & 0x1F;
1368         if ((id != C168_ASIC_ID) &&
1369                         (id != C104_ASIC_ID) &&
1370                         (id != C102_ASIC_ID) &&
1371                         (id != CI132_ASIC_ID) &&
1372                         (id != CI134_ASIC_ID) &&
1373                         (id != CI104J_ASIC_ID))
1374                 return -1;
1375         for (i = 0, j = 0; i < 4; i++) {
1376                 n = inb(port + 2);
1377                 if (n == 'M') {
1378                         j = 1;
1379                 } else if ((j == 1) && (n == 1)) {
1380                         j = 2;
1381                         break;
1382                 } else
1383                         j = 0;
1384         }
1385         if (j != 2)
1386                 id = -2;
1387         return id;
1388 }
1389
1390 static void __init mxser_normal_mode(int port)
1391 {
1392         int i, n;
1393
1394         outb(0xA5, port + 1);
1395         outb(0x80, port + 3);
1396         outb(12, port + 0);     /* 9600 bps */
1397         outb(0, port + 1);
1398         outb(0x03, port + 3);   /* 8 data bits */
1399         outb(0x13, port + 4);   /* loop back mode */
1400         for (i = 0; i < 16; i++) {
1401                 n = inb(port + 5);
1402                 if ((n & 0x61) == 0x60)
1403                         break;
1404                 if ((n & 1) == 1)
1405                         (void)inb(port);
1406         }
1407         outb(0x00, port + 4);
1408 }
1409
1410 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1411 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1412 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1413 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1414 #define EN_CCMD         0x000   /* Chip's command register     */
1415 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1416 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1417 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1418 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1419 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1420 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1421 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1422 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1423 static int __init mxser_read_register(int port, unsigned short *regs)
1424 {
1425         int i, k, value, id;
1426         unsigned int j;
1427
1428         id = mxser_program_mode(port);
1429         if (id < 0)
1430                 return id;
1431         for (i = 0; i < 14; i++) {
1432                 k = (i & 0x3F) | 0x180;
1433                 for (j = 0x100; j > 0; j >>= 1) {
1434                         outb(CHIP_CS, port);
1435                         if (k & j) {
1436                                 outb(CHIP_CS | CHIP_DO, port);
1437                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1438                         } else {
1439                                 outb(CHIP_CS, port);
1440                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1441                         }
1442                 }
1443                 (void)inb(port);
1444                 value = 0;
1445                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1446                         outb(CHIP_CS, port);
1447                         outb(CHIP_CS | CHIP_SK, port);
1448                         if (inb(port) & CHIP_DI)
1449                                 value |= j;
1450                 }
1451                 regs[i] = value;
1452                 outb(0, port);
1453         }
1454         mxser_normal_mode(port);
1455         return id;
1456 }
1457
1458 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1459 {
1460         struct mxser_port *port;
1461         int result, status;
1462         unsigned int i, j;
1463         int ret = 0;
1464
1465         switch (cmd) {
1466         case MOXA_GET_MAJOR:
1467                 return put_user(ttymajor, (int __user *)argp);
1468
1469         case MOXA_CHKPORTENABLE:
1470                 result = 0;
1471                 lock_kernel();
1472                 for (i = 0; i < MXSER_BOARDS; i++)
1473                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1474                                 if (mxser_boards[i].ports[j].ioaddr)
1475                                         result |= (1 << i);
1476                 unlock_kernel();
1477                 return put_user(result, (unsigned long __user *)argp);
1478         case MOXA_GETDATACOUNT:
1479                 lock_kernel();
1480                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1481                         ret = -EFAULT;
1482                 unlock_kernel();
1483                 return ret;
1484         case MOXA_GETMSTATUS:
1485                 lock_kernel();
1486                 for (i = 0; i < MXSER_BOARDS; i++)
1487                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1488                                 port = &mxser_boards[i].ports[j];
1489
1490                                 GMStatus[i].ri = 0;
1491                                 if (!port->ioaddr) {
1492                                         GMStatus[i].dcd = 0;
1493                                         GMStatus[i].dsr = 0;
1494                                         GMStatus[i].cts = 0;
1495                                         continue;
1496                                 }
1497
1498                                 if (!port->tty || !port->tty->termios)
1499                                         GMStatus[i].cflag =
1500                                                 port->normal_termios.c_cflag;
1501                                 else
1502                                         GMStatus[i].cflag =
1503                                                 port->tty->termios->c_cflag;
1504
1505                                 status = inb(port->ioaddr + UART_MSR);
1506                                 if (status & 0x80 /*UART_MSR_DCD */ )
1507                                         GMStatus[i].dcd = 1;
1508                                 else
1509                                         GMStatus[i].dcd = 0;
1510
1511                                 if (status & 0x20 /*UART_MSR_DSR */ )
1512                                         GMStatus[i].dsr = 1;
1513                                 else
1514                                         GMStatus[i].dsr = 0;
1515
1516
1517                                 if (status & 0x10 /*UART_MSR_CTS */ )
1518                                         GMStatus[i].cts = 1;
1519                                 else
1520                                         GMStatus[i].cts = 0;
1521                         }
1522                 unlock_kernel();
1523                 if (copy_to_user(argp, GMStatus,
1524                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1525                         return -EFAULT;
1526                 return 0;
1527         case MOXA_ASPP_MON_EXT: {
1528                 int p, shiftbit;
1529                 unsigned long opmode;
1530                 unsigned cflag, iflag;
1531
1532                 lock_kernel();
1533                 for (i = 0; i < MXSER_BOARDS; i++) {
1534                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1535                                 port = &mxser_boards[i].ports[j];
1536                                 if (!port->ioaddr)
1537                                         continue;
1538
1539                                 status = mxser_get_msr(port->ioaddr, 0, i);
1540
1541                                 if (status & UART_MSR_TERI)
1542                                         port->icount.rng++;
1543                                 if (status & UART_MSR_DDSR)
1544                                         port->icount.dsr++;
1545                                 if (status & UART_MSR_DDCD)
1546                                         port->icount.dcd++;
1547                                 if (status & UART_MSR_DCTS)
1548                                         port->icount.cts++;
1549
1550                                 port->mon_data.modem_status = status;
1551                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1552                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1553                                 mon_data_ext.up_rxcnt[i] =
1554                                         port->mon_data.up_rxcnt;
1555                                 mon_data_ext.up_txcnt[i] =
1556                                         port->mon_data.up_txcnt;
1557                                 mon_data_ext.modem_status[i] =
1558                                         port->mon_data.modem_status;
1559                                 mon_data_ext.baudrate[i] =
1560                                         tty_get_baud_rate(port->tty);
1561
1562                                 if (!port->tty || !port->tty->termios) {
1563                                         cflag = port->normal_termios.c_cflag;
1564                                         iflag = port->normal_termios.c_iflag;
1565                                 } else {
1566                                         cflag = port->tty->termios->c_cflag;
1567                                         iflag = port->tty->termios->c_iflag;
1568                                 }
1569
1570                                 mon_data_ext.databits[i] = cflag & CSIZE;
1571
1572                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1573
1574                                 mon_data_ext.parity[i] =
1575                                         cflag & (PARENB | PARODD | CMSPAR);
1576
1577                                 mon_data_ext.flowctrl[i] = 0x00;
1578
1579                                 if (cflag & CRTSCTS)
1580                                         mon_data_ext.flowctrl[i] |= 0x03;
1581
1582                                 if (iflag & (IXON | IXOFF))
1583                                         mon_data_ext.flowctrl[i] |= 0x0C;
1584
1585                                 if (port->type == PORT_16550A)
1586                                         mon_data_ext.fifo[i] = 1;
1587                                 else
1588                                         mon_data_ext.fifo[i] = 0;
1589
1590                                 p = i % 4;
1591                                 shiftbit = p * 2;
1592                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1593                                 opmode &= OP_MODE_MASK;
1594
1595                                 mon_data_ext.iftype[i] = opmode;
1596
1597                         }
1598                 }
1599                 unlock_kernel();
1600                 if (copy_to_user(argp, &mon_data_ext,
1601                                         sizeof(mon_data_ext)))
1602                         return -EFAULT;
1603                 return 0;
1604         }
1605         default:
1606                 return -ENOIOCTLCMD;
1607         }
1608         return 0;
1609 }
1610
1611 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1612                 struct async_icount *cprev)
1613 {
1614         struct async_icount cnow;
1615         unsigned long flags;
1616         int ret;
1617
1618         spin_lock_irqsave(&info->slock, flags);
1619         cnow = info->icount;    /* atomic copy */
1620         spin_unlock_irqrestore(&info->slock, flags);
1621
1622         ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1623                 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1624                 ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1625                 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1626
1627         *cprev = cnow;
1628
1629         return ret;
1630 }
1631
1632 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1633                 unsigned int cmd, unsigned long arg)
1634 {
1635         struct mxser_port *info = tty->driver_data;
1636         struct async_icount cnow;
1637         struct serial_icounter_struct __user *p_cuser;
1638         unsigned long flags;
1639         void __user *argp = (void __user *)arg;
1640         int retval;
1641
1642         if (tty->index == MXSER_PORTS)
1643                 return mxser_ioctl_special(cmd, argp);
1644
1645         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1646                 int p;
1647                 unsigned long opmode;
1648                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1649                 int shiftbit;
1650                 unsigned char val, mask;
1651
1652                 p = tty->index % 4;
1653                 if (cmd == MOXA_SET_OP_MODE) {
1654                         if (get_user(opmode, (int __user *) argp))
1655                                 return -EFAULT;
1656                         if (opmode != RS232_MODE &&
1657                                         opmode != RS485_2WIRE_MODE &&
1658                                         opmode != RS422_MODE &&
1659                                         opmode != RS485_4WIRE_MODE)
1660                                 return -EFAULT;
1661                         lock_kernel();
1662                         mask = ModeMask[p];
1663                         shiftbit = p * 2;
1664                         val = inb(info->opmode_ioaddr);
1665                         val &= mask;
1666                         val |= (opmode << shiftbit);
1667                         outb(val, info->opmode_ioaddr);
1668                         unlock_kernel();
1669                 } else {
1670                         lock_kernel();
1671                         shiftbit = p * 2;
1672                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1673                         opmode &= OP_MODE_MASK;
1674                         unlock_kernel();
1675                         if (put_user(opmode, (int __user *)argp))
1676                                 return -EFAULT;
1677                 }
1678                 return 0;
1679         }
1680
1681         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1682                         test_bit(TTY_IO_ERROR, &tty->flags))
1683                 return -EIO;
1684
1685         switch (cmd) {
1686         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1687                 retval = tty_check_change(tty);
1688                 if (retval)
1689                         return retval;
1690                 tty_wait_until_sent(tty, 0);
1691                 if (!arg)
1692                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1693                 return 0;
1694         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1695                 retval = tty_check_change(tty);
1696                 if (retval)
1697                         return retval;
1698                 tty_wait_until_sent(tty, 0);
1699                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1700                 return 0;
1701         case TIOCGSERIAL:
1702                 lock_kernel();
1703                 retval = mxser_get_serial_info(info, argp);
1704                 unlock_kernel();
1705                 return retval;
1706         case TIOCSSERIAL:
1707                 lock_kernel();
1708                 retval = mxser_set_serial_info(info, argp);
1709                 unlock_kernel();
1710                 return retval;
1711         case TIOCSERGETLSR:     /* Get line status register */
1712                 return  mxser_get_lsr_info(info, argp);
1713                 /*
1714                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1715                  * - mask passed in arg for lines of interest
1716                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1717                  * Caller should use TIOCGICOUNT to see which one it was
1718                  */
1719         case TIOCMIWAIT:
1720                 spin_lock_irqsave(&info->slock, flags);
1721                 cnow = info->icount;    /* note the counters on entry */
1722                 spin_unlock_irqrestore(&info->slock, flags);
1723
1724                 return wait_event_interruptible(info->delta_msr_wait,
1725                                 mxser_cflags_changed(info, arg, &cnow));
1726         /*
1727          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1728          * Return: write counters to the user passed counter struct
1729          * NB: both 1->0 and 0->1 transitions are counted except for
1730          *     RI where only 0->1 is counted.
1731          */
1732         case TIOCGICOUNT:
1733                 spin_lock_irqsave(&info->slock, flags);
1734                 cnow = info->icount;
1735                 spin_unlock_irqrestore(&info->slock, flags);
1736                 p_cuser = argp;
1737                 if (put_user(cnow.frame, &p_cuser->frame))
1738                         return -EFAULT;
1739                 if (put_user(cnow.brk, &p_cuser->brk))
1740                         return -EFAULT;
1741                 if (put_user(cnow.overrun, &p_cuser->overrun))
1742                         return -EFAULT;
1743                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1744                         return -EFAULT;
1745                 if (put_user(cnow.parity, &p_cuser->parity))
1746                         return -EFAULT;
1747                 if (put_user(cnow.rx, &p_cuser->rx))
1748                         return -EFAULT;
1749                 if (put_user(cnow.tx, &p_cuser->tx))
1750                         return -EFAULT;
1751                 put_user(cnow.cts, &p_cuser->cts);
1752                 put_user(cnow.dsr, &p_cuser->dsr);
1753                 put_user(cnow.rng, &p_cuser->rng);
1754                 put_user(cnow.dcd, &p_cuser->dcd);
1755                 return 0;
1756         case MOXA_HighSpeedOn:
1757                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1758         case MOXA_SDS_RSTICOUNTER:
1759                 lock_kernel();
1760                 info->mon_data.rxcnt = 0;
1761                 info->mon_data.txcnt = 0;
1762                 unlock_kernel();
1763                 return 0;
1764
1765         case MOXA_ASPP_OQUEUE:{
1766                 int len, lsr;
1767
1768                 lock_kernel();
1769                 len = mxser_chars_in_buffer(tty);
1770                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1771                 len += (lsr ? 0 : 1);
1772                 unlock_kernel();
1773
1774                 return put_user(len, (int __user *)argp);
1775         }
1776         case MOXA_ASPP_MON: {
1777                 int mcr, status;
1778
1779                 lock_kernel();
1780                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1781                 mxser_check_modem_status(info, status);
1782
1783                 mcr = inb(info->ioaddr + UART_MCR);
1784                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1785                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1786                 else
1787                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1788
1789                 if (mcr & MOXA_MUST_MCR_TX_XON)
1790                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1791                 else
1792                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1793
1794                 if (info->tty->hw_stopped)
1795                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1796                 else
1797                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1798                 unlock_kernel();
1799                 if (copy_to_user(argp, &info->mon_data,
1800                                 sizeof(struct mxser_mon)))
1801                         return -EFAULT;
1802
1803                 return 0;
1804         }
1805         case MOXA_ASPP_LSTATUS: {
1806                 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1807                         return -EFAULT;
1808
1809                 info->err_shadow = 0;
1810                 return 0;
1811         }
1812         case MOXA_SET_BAUD_METHOD: {
1813                 int method;
1814
1815                 if (get_user(method, (int __user *)argp))
1816                         return -EFAULT;
1817                 mxser_set_baud_method[tty->index] = method;
1818                 return put_user(method, (int __user *)argp);
1819         }
1820         default:
1821                 return -ENOIOCTLCMD;
1822         }
1823         return 0;
1824 }
1825
1826 static void mxser_stoprx(struct tty_struct *tty)
1827 {
1828         struct mxser_port *info = tty->driver_data;
1829
1830         info->ldisc_stop_rx = 1;
1831         if (I_IXOFF(tty)) {
1832                 if (info->board->chip_flag) {
1833                         info->IER &= ~MOXA_MUST_RECV_ISR;
1834                         outb(info->IER, info->ioaddr + UART_IER);
1835                 } else {
1836                         info->x_char = STOP_CHAR(tty);
1837                         outb(0, info->ioaddr + UART_IER);
1838                         info->IER |= UART_IER_THRI;
1839                         outb(info->IER, info->ioaddr + UART_IER);
1840                 }
1841         }
1842
1843         if (info->tty->termios->c_cflag & CRTSCTS) {
1844                 info->MCR &= ~UART_MCR_RTS;
1845                 outb(info->MCR, info->ioaddr + UART_MCR);
1846         }
1847 }
1848
1849 /*
1850  * This routine is called by the upper-layer tty layer to signal that
1851  * incoming characters should be throttled.
1852  */
1853 static void mxser_throttle(struct tty_struct *tty)
1854 {
1855         mxser_stoprx(tty);
1856 }
1857
1858 static void mxser_unthrottle(struct tty_struct *tty)
1859 {
1860         struct mxser_port *info = tty->driver_data;
1861
1862         /* startrx */
1863         info->ldisc_stop_rx = 0;
1864         if (I_IXOFF(tty)) {
1865                 if (info->x_char)
1866                         info->x_char = 0;
1867                 else {
1868                         if (info->board->chip_flag) {
1869                                 info->IER |= MOXA_MUST_RECV_ISR;
1870                                 outb(info->IER, info->ioaddr + UART_IER);
1871                         } else {
1872                                 info->x_char = START_CHAR(tty);
1873                                 outb(0, info->ioaddr + UART_IER);
1874                                 info->IER |= UART_IER_THRI;
1875                                 outb(info->IER, info->ioaddr + UART_IER);
1876                         }
1877                 }
1878         }
1879
1880         if (info->tty->termios->c_cflag & CRTSCTS) {
1881                 info->MCR |= UART_MCR_RTS;
1882                 outb(info->MCR, info->ioaddr + UART_MCR);
1883         }
1884 }
1885
1886 /*
1887  * mxser_stop() and mxser_start()
1888  *
1889  * This routines are called before setting or resetting tty->stopped.
1890  * They enable or disable transmitter interrupts, as necessary.
1891  */
1892 static void mxser_stop(struct tty_struct *tty)
1893 {
1894         struct mxser_port *info = tty->driver_data;
1895         unsigned long flags;
1896
1897         spin_lock_irqsave(&info->slock, flags);
1898         if (info->IER & UART_IER_THRI) {
1899                 info->IER &= ~UART_IER_THRI;
1900                 outb(info->IER, info->ioaddr + UART_IER);
1901         }
1902         spin_unlock_irqrestore(&info->slock, flags);
1903 }
1904
1905 static void mxser_start(struct tty_struct *tty)
1906 {
1907         struct mxser_port *info = tty->driver_data;
1908         unsigned long flags;
1909
1910         spin_lock_irqsave(&info->slock, flags);
1911         if (info->xmit_cnt && info->xmit_buf) {
1912                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1913                 info->IER |= UART_IER_THRI;
1914                 outb(info->IER, info->ioaddr + UART_IER);
1915         }
1916         spin_unlock_irqrestore(&info->slock, flags);
1917 }
1918
1919 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1920 {
1921         struct mxser_port *info = tty->driver_data;
1922         unsigned long flags;
1923
1924         spin_lock_irqsave(&info->slock, flags);
1925         mxser_change_speed(info, old_termios);
1926         spin_unlock_irqrestore(&info->slock, flags);
1927
1928         if ((old_termios->c_cflag & CRTSCTS) &&
1929                         !(tty->termios->c_cflag & CRTSCTS)) {
1930                 tty->hw_stopped = 0;
1931                 mxser_start(tty);
1932         }
1933
1934         /* Handle sw stopped */
1935         if ((old_termios->c_iflag & IXON) &&
1936                         !(tty->termios->c_iflag & IXON)) {
1937                 tty->stopped = 0;
1938
1939                 if (info->board->chip_flag) {
1940                         spin_lock_irqsave(&info->slock, flags);
1941                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1942                         spin_unlock_irqrestore(&info->slock, flags);
1943                 }
1944
1945                 mxser_start(tty);
1946         }
1947 }
1948
1949 /*
1950  * mxser_wait_until_sent() --- wait until the transmitter is empty
1951  */
1952 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1953 {
1954         struct mxser_port *info = tty->driver_data;
1955         unsigned long orig_jiffies, char_time;
1956         int lsr;
1957
1958         if (info->type == PORT_UNKNOWN)
1959                 return;
1960
1961         if (info->xmit_fifo_size == 0)
1962                 return;         /* Just in case.... */
1963
1964         orig_jiffies = jiffies;
1965         /*
1966          * Set the check interval to be 1/5 of the estimated time to
1967          * send a single character, and make it at least 1.  The check
1968          * interval should also be less than the timeout.
1969          *
1970          * Note: we have to use pretty tight timings here to satisfy
1971          * the NIST-PCTS.
1972          */
1973         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1974         char_time = char_time / 5;
1975         if (char_time == 0)
1976                 char_time = 1;
1977         if (timeout && timeout < char_time)
1978                 char_time = timeout;
1979         /*
1980          * If the transmitter hasn't cleared in twice the approximate
1981          * amount of time to send the entire FIFO, it probably won't
1982          * ever clear.  This assumes the UART isn't doing flow
1983          * control, which is currently the case.  Hence, if it ever
1984          * takes longer than info->timeout, this is probably due to a
1985          * UART bug of some kind.  So, we clamp the timeout parameter at
1986          * 2*info->timeout.
1987          */
1988         if (!timeout || timeout > 2 * info->timeout)
1989                 timeout = 2 * info->timeout;
1990 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1991         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1992                 timeout, char_time);
1993         printk("jiff=%lu...", jiffies);
1994 #endif
1995         lock_kernel();
1996         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1997 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1998                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1999 #endif
2000                 schedule_timeout_interruptible(char_time);
2001                 if (signal_pending(current))
2002                         break;
2003                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2004                         break;
2005         }
2006         set_current_state(TASK_RUNNING);
2007         unlock_kernel();
2008
2009 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2010         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2011 #endif
2012 }
2013
2014 /*
2015  * This routine is called by tty_hangup() when a hangup is signaled.
2016  */
2017 static void mxser_hangup(struct tty_struct *tty)
2018 {
2019         struct mxser_port *info = tty->driver_data;
2020
2021         mxser_flush_buffer(tty);
2022         mxser_shutdown(info);
2023         info->event = 0;
2024         info->count = 0;
2025         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2026         info->tty = NULL;
2027         wake_up_interruptible(&info->open_wait);
2028 }
2029
2030 /*
2031  * mxser_rs_break() --- routine which turns the break handling on or off
2032  */
2033 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2034 {
2035         struct mxser_port *info = tty->driver_data;
2036         unsigned long flags;
2037
2038         spin_lock_irqsave(&info->slock, flags);
2039         if (break_state == -1)
2040                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2041                         info->ioaddr + UART_LCR);
2042         else
2043                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2044                         info->ioaddr + UART_LCR);
2045         spin_unlock_irqrestore(&info->slock, flags);
2046 }
2047
2048 static void mxser_receive_chars(struct mxser_port *port, int *status)
2049 {
2050         struct tty_struct *tty = port->tty;
2051         unsigned char ch, gdl;
2052         int ignored = 0;
2053         int cnt = 0;
2054         int recv_room;
2055         int max = 256;
2056
2057         recv_room = tty->receive_room;
2058         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2059                 mxser_stoprx(tty);
2060
2061         if (port->board->chip_flag != MOXA_OTHER_UART) {
2062
2063                 if (*status & UART_LSR_SPECIAL)
2064                         goto intr_old;
2065                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2066                                 (*status & MOXA_MUST_LSR_RERR))
2067                         goto intr_old;
2068                 if (*status & MOXA_MUST_LSR_RERR)
2069                         goto intr_old;
2070
2071                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2072
2073                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2074                         gdl &= MOXA_MUST_GDL_MASK;
2075                 if (gdl >= recv_room) {
2076                         if (!port->ldisc_stop_rx)
2077                                 mxser_stoprx(tty);
2078                 }
2079                 while (gdl--) {
2080                         ch = inb(port->ioaddr + UART_RX);
2081                         tty_insert_flip_char(tty, ch, 0);
2082                         cnt++;
2083                 }
2084                 goto end_intr;
2085         }
2086 intr_old:
2087
2088         do {
2089                 if (max-- < 0)
2090                         break;
2091
2092                 ch = inb(port->ioaddr + UART_RX);
2093                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2094                         outb(0x23, port->ioaddr + UART_FCR);
2095                 *status &= port->read_status_mask;
2096                 if (*status & port->ignore_status_mask) {
2097                         if (++ignored > 100)
2098                                 break;
2099                 } else {
2100                         char flag = 0;
2101                         if (*status & UART_LSR_SPECIAL) {
2102                                 if (*status & UART_LSR_BI) {
2103                                         flag = TTY_BREAK;
2104                                         port->icount.brk++;
2105
2106                                         if (port->flags & ASYNC_SAK)
2107                                                 do_SAK(tty);
2108                                 } else if (*status & UART_LSR_PE) {
2109                                         flag = TTY_PARITY;
2110                                         port->icount.parity++;
2111                                 } else if (*status & UART_LSR_FE) {
2112                                         flag = TTY_FRAME;
2113                                         port->icount.frame++;
2114                                 } else if (*status & UART_LSR_OE) {
2115                                         flag = TTY_OVERRUN;
2116                                         port->icount.overrun++;
2117                                 } else
2118                                         flag = TTY_BREAK;
2119                         }
2120                         tty_insert_flip_char(tty, ch, flag);
2121                         cnt++;
2122                         if (cnt >= recv_room) {
2123                                 if (!port->ldisc_stop_rx)
2124                                         mxser_stoprx(tty);
2125                                 break;
2126                         }
2127
2128                 }
2129
2130                 if (port->board->chip_flag)
2131                         break;
2132
2133                 *status = inb(port->ioaddr + UART_LSR);
2134         } while (*status & UART_LSR_DR);
2135
2136 end_intr:
2137         mxvar_log.rxcnt[port->tty->index] += cnt;
2138         port->mon_data.rxcnt += cnt;
2139         port->mon_data.up_rxcnt += cnt;
2140
2141         /*
2142          * We are called from an interrupt context with &port->slock
2143          * being held. Drop it temporarily in order to prevent
2144          * recursive locking.
2145          */
2146         spin_unlock(&port->slock);
2147         tty_flip_buffer_push(tty);
2148         spin_lock(&port->slock);
2149 }
2150
2151 static void mxser_transmit_chars(struct mxser_port *port)
2152 {
2153         int count, cnt;
2154
2155         if (port->x_char) {
2156                 outb(port->x_char, port->ioaddr + UART_TX);
2157                 port->x_char = 0;
2158                 mxvar_log.txcnt[port->tty->index]++;
2159                 port->mon_data.txcnt++;
2160                 port->mon_data.up_txcnt++;
2161                 port->icount.tx++;
2162                 return;
2163         }
2164
2165         if (port->xmit_buf == NULL)
2166                 return;
2167
2168         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2169                         (port->tty->hw_stopped &&
2170                         (port->type != PORT_16550A) &&
2171                         (!port->board->chip_flag))) {
2172                 port->IER &= ~UART_IER_THRI;
2173                 outb(port->IER, port->ioaddr + UART_IER);
2174                 return;
2175         }
2176
2177         cnt = port->xmit_cnt;
2178         count = port->xmit_fifo_size;
2179         do {
2180                 outb(port->xmit_buf[port->xmit_tail++],
2181                         port->ioaddr + UART_TX);
2182                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2183                 if (--port->xmit_cnt <= 0)
2184                         break;
2185         } while (--count > 0);
2186         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2187
2188         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2189         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2190         port->icount.tx += (cnt - port->xmit_cnt);
2191
2192         if (port->xmit_cnt < WAKEUP_CHARS)
2193                 tty_wakeup(port->tty);
2194
2195         if (port->xmit_cnt <= 0) {
2196                 port->IER &= ~UART_IER_THRI;
2197                 outb(port->IER, port->ioaddr + UART_IER);
2198         }
2199 }
2200
2201 /*
2202  * This is the serial driver's generic interrupt routine
2203  */
2204 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2205 {
2206         int status, iir, i;
2207         struct mxser_board *brd = NULL;
2208         struct mxser_port *port;
2209         int max, irqbits, bits, msr;
2210         unsigned int int_cnt, pass_counter = 0;
2211         int handled = IRQ_NONE;
2212
2213         for (i = 0; i < MXSER_BOARDS; i++)
2214                 if (dev_id == &mxser_boards[i]) {
2215                         brd = dev_id;
2216                         break;
2217                 }
2218
2219         if (i == MXSER_BOARDS)
2220                 goto irq_stop;
2221         if (brd == NULL)
2222                 goto irq_stop;
2223         max = brd->info->nports;
2224         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2225                 irqbits = inb(brd->vector) & brd->vector_mask;
2226                 if (irqbits == brd->vector_mask)
2227                         break;
2228
2229                 handled = IRQ_HANDLED;
2230                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2231                         if (irqbits == brd->vector_mask)
2232                                 break;
2233                         if (bits & irqbits)
2234                                 continue;
2235                         port = &brd->ports[i];
2236
2237                         int_cnt = 0;
2238                         spin_lock(&port->slock);
2239                         do {
2240                                 iir = inb(port->ioaddr + UART_IIR);
2241                                 if (iir & UART_IIR_NO_INT)
2242                                         break;
2243                                 iir &= MOXA_MUST_IIR_MASK;
2244                                 if (!port->tty ||
2245                                                 (port->flags & ASYNC_CLOSING) ||
2246                                                 !(port->flags &
2247                                                         ASYNC_INITIALIZED)) {
2248                                         status = inb(port->ioaddr + UART_LSR);
2249                                         outb(0x27, port->ioaddr + UART_FCR);
2250                                         inb(port->ioaddr + UART_MSR);
2251                                         break;
2252                                 }
2253
2254                                 status = inb(port->ioaddr + UART_LSR);
2255
2256                                 if (status & UART_LSR_PE)
2257                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2258                                 if (status & UART_LSR_FE)
2259                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2260                                 if (status & UART_LSR_OE)
2261                                         port->err_shadow |=
2262                                                 NPPI_NOTIFY_HW_OVERRUN;
2263                                 if (status & UART_LSR_BI)
2264                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2265
2266                                 if (port->board->chip_flag) {
2267                                         if (iir == MOXA_MUST_IIR_GDA ||
2268                                             iir == MOXA_MUST_IIR_RDA ||
2269                                             iir == MOXA_MUST_IIR_RTO ||
2270                                             iir == MOXA_MUST_IIR_LSR)
2271                                                 mxser_receive_chars(port,
2272                                                                 &status);
2273
2274                                 } else {
2275                                         status &= port->read_status_mask;
2276                                         if (status & UART_LSR_DR)
2277                                                 mxser_receive_chars(port,
2278                                                                 &status);
2279                                 }
2280                                 msr = inb(port->ioaddr + UART_MSR);
2281                                 if (msr & UART_MSR_ANY_DELTA)
2282                                         mxser_check_modem_status(port, msr);
2283
2284                                 if (port->board->chip_flag) {
2285                                         if (iir == 0x02 && (status &
2286                                                                 UART_LSR_THRE))
2287                                                 mxser_transmit_chars(port);
2288                                 } else {
2289                                         if (status & UART_LSR_THRE)
2290                                                 mxser_transmit_chars(port);
2291                                 }
2292                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2293                         spin_unlock(&port->slock);
2294                 }
2295         }
2296
2297 irq_stop:
2298         return handled;
2299 }
2300
2301 static const struct tty_operations mxser_ops = {
2302         .open = mxser_open,
2303         .close = mxser_close,
2304         .write = mxser_write,
2305         .put_char = mxser_put_char,
2306         .flush_chars = mxser_flush_chars,
2307         .write_room = mxser_write_room,
2308         .chars_in_buffer = mxser_chars_in_buffer,
2309         .flush_buffer = mxser_flush_buffer,
2310         .ioctl = mxser_ioctl,
2311         .throttle = mxser_throttle,
2312         .unthrottle = mxser_unthrottle,
2313         .set_termios = mxser_set_termios,
2314         .stop = mxser_stop,
2315         .start = mxser_start,
2316         .hangup = mxser_hangup,
2317         .break_ctl = mxser_rs_break,
2318         .wait_until_sent = mxser_wait_until_sent,
2319         .tiocmget = mxser_tiocmget,
2320         .tiocmset = mxser_tiocmset,
2321 };
2322
2323 /*
2324  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2325  */
2326
2327 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2328                 unsigned int irq)
2329 {
2330         if (irq)
2331                 free_irq(brd->irq, brd);
2332         if (pdev != NULL) {     /* PCI */
2333 #ifdef CONFIG_PCI
2334                 pci_release_region(pdev, 2);
2335                 pci_release_region(pdev, 3);
2336 #endif
2337         } else {
2338                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2339                 release_region(brd->vector, 1);
2340         }
2341 }
2342
2343 static int __devinit mxser_initbrd(struct mxser_board *brd,
2344                 struct pci_dev *pdev)
2345 {
2346         struct mxser_port *info;
2347         unsigned int i;
2348         int retval;
2349
2350         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2351
2352         for (i = 0; i < brd->info->nports; i++) {
2353                 info = &brd->ports[i];
2354                 info->board = brd;
2355                 info->stop_rx = 0;
2356                 info->ldisc_stop_rx = 0;
2357
2358                 /* Enhance mode enabled here */
2359                 if (brd->chip_flag != MOXA_OTHER_UART)
2360                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2361
2362                 info->flags = ASYNC_SHARE_IRQ;
2363                 info->type = brd->uart_type;
2364
2365                 process_txrx_fifo(info);
2366
2367                 info->custom_divisor = info->baud_base * 16;
2368                 info->close_delay = 5 * HZ / 10;
2369                 info->closing_wait = 30 * HZ;
2370                 info->normal_termios = mxvar_sdriver->init_termios;
2371                 init_waitqueue_head(&info->open_wait);
2372                 init_waitqueue_head(&info->delta_msr_wait);
2373                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2374                 info->err_shadow = 0;
2375                 spin_lock_init(&info->slock);
2376
2377                 /* before set INT ISR, disable all int */
2378                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2379                         info->ioaddr + UART_IER);
2380         }
2381
2382         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2383                         brd);
2384         if (retval) {
2385                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2386                         "conflict with another device.\n",
2387                         brd->info->name, brd->irq);
2388                 /* We hold resources, we need to release them. */
2389                 mxser_release_res(brd, pdev, 0);
2390         }
2391         return retval;
2392 }
2393
2394 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2395 {
2396         int id, i, bits;
2397         unsigned short regs[16], irq;
2398         unsigned char scratch, scratch2;
2399
2400         brd->chip_flag = MOXA_OTHER_UART;
2401
2402         id = mxser_read_register(cap, regs);
2403         switch (id) {
2404         case C168_ASIC_ID:
2405                 brd->info = &mxser_cards[0];
2406                 break;
2407         case C104_ASIC_ID:
2408                 brd->info = &mxser_cards[1];
2409                 break;
2410         case CI104J_ASIC_ID:
2411                 brd->info = &mxser_cards[2];
2412                 break;
2413         case C102_ASIC_ID:
2414                 brd->info = &mxser_cards[5];
2415                 break;
2416         case CI132_ASIC_ID:
2417                 brd->info = &mxser_cards[6];
2418                 break;
2419         case CI134_ASIC_ID:
2420                 brd->info = &mxser_cards[7];
2421                 break;
2422         default:
2423                 return 0;
2424         }
2425
2426         irq = 0;
2427         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2428            Flag-hack checks if configuration should be read as 2-port here. */
2429         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2430                 irq = regs[9] & 0xF000;
2431                 irq = irq | (irq >> 4);
2432                 if (irq != (regs[9] & 0xFF00))
2433                         return MXSER_ERR_IRQ_CONFLIT;
2434         } else if (brd->info->nports == 4) {
2435                 irq = regs[9] & 0xF000;
2436                 irq = irq | (irq >> 4);
2437                 irq = irq | (irq >> 8);
2438                 if (irq != regs[9])
2439                         return MXSER_ERR_IRQ_CONFLIT;
2440         } else if (brd->info->nports == 8) {
2441                 irq = regs[9] & 0xF000;
2442                 irq = irq | (irq >> 4);
2443                 irq = irq | (irq >> 8);
2444                 if ((irq != regs[9]) || (irq != regs[10]))
2445                         return MXSER_ERR_IRQ_CONFLIT;
2446         }
2447
2448         if (!irq)
2449                 return MXSER_ERR_IRQ;
2450         brd->irq = ((int)(irq & 0xF000) >> 12);
2451         for (i = 0; i < 8; i++)
2452                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2453         if ((regs[12] & 0x80) == 0)
2454                 return MXSER_ERR_VECTOR;
2455         brd->vector = (int)regs[11];    /* interrupt vector */
2456         if (id == 1)
2457                 brd->vector_mask = 0x00FF;
2458         else
2459                 brd->vector_mask = 0x000F;
2460         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2461                 if (regs[12] & bits) {
2462                         brd->ports[i].baud_base = 921600;
2463                         brd->ports[i].max_baud = 921600;
2464                 } else {
2465                         brd->ports[i].baud_base = 115200;
2466                         brd->ports[i].max_baud = 115200;
2467                 }
2468         }
2469         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2470         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2471         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2472         outb(scratch2, cap + UART_LCR);
2473         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2474         scratch = inb(cap + UART_IIR);
2475
2476         if (scratch & 0xC0)
2477                 brd->uart_type = PORT_16550A;
2478         else
2479                 brd->uart_type = PORT_16450;
2480         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2481                         "mxser(IO)"))
2482                 return MXSER_ERR_IOADDR;
2483         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2484                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2485                 return MXSER_ERR_VECTOR;
2486         }
2487         return brd->info->nports;
2488 }
2489
2490 static int __devinit mxser_probe(struct pci_dev *pdev,
2491                 const struct pci_device_id *ent)
2492 {
2493 #ifdef CONFIG_PCI
2494         struct mxser_board *brd;
2495         unsigned int i, j;
2496         unsigned long ioaddress;
2497         int retval = -EINVAL;
2498
2499         for (i = 0; i < MXSER_BOARDS; i++)
2500                 if (mxser_boards[i].info == NULL)
2501                         break;
2502
2503         if (i >= MXSER_BOARDS) {
2504                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2505                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2506                 goto err;
2507         }
2508
2509         brd = &mxser_boards[i];
2510         brd->idx = i * MXSER_PORTS_PER_BOARD;
2511         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2512                 mxser_cards[ent->driver_data].name,
2513                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2514
2515         retval = pci_enable_device(pdev);
2516         if (retval) {
2517                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2518                 goto err;
2519         }
2520
2521         /* io address */
2522         ioaddress = pci_resource_start(pdev, 2);
2523         retval = pci_request_region(pdev, 2, "mxser(IO)");
2524         if (retval)
2525                 goto err;
2526
2527         brd->info = &mxser_cards[ent->driver_data];
2528         for (i = 0; i < brd->info->nports; i++)
2529                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2530
2531         /* vector */
2532         ioaddress = pci_resource_start(pdev, 3);
2533         retval = pci_request_region(pdev, 3, "mxser(vector)");
2534         if (retval)
2535                 goto err_relio;
2536         brd->vector = ioaddress;
2537
2538         /* irq */
2539         brd->irq = pdev->irq;
2540
2541         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2542         brd->uart_type = PORT_16550A;
2543         brd->vector_mask = 0;
2544
2545         for (i = 0; i < brd->info->nports; i++) {
2546                 for (j = 0; j < UART_INFO_NUM; j++) {
2547                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2548                                 brd->ports[i].max_baud =
2549                                         Gpci_uart_info[j].max_baud;
2550
2551                                 /* exception....CP-102 */
2552                                 if (brd->info->flags & MXSER_HIGHBAUD)
2553                                         brd->ports[i].max_baud = 921600;
2554                                 break;
2555                         }
2556                 }
2557         }
2558
2559         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2560                 for (i = 0; i < brd->info->nports; i++) {
2561                         if (i < 4)
2562                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2563                         else
2564                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2565                 }
2566                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2567                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2568         }
2569
2570         for (i = 0; i < brd->info->nports; i++) {
2571                 brd->vector_mask |= (1 << i);
2572                 brd->ports[i].baud_base = 921600;
2573         }
2574
2575         /* mxser_initbrd will hook ISR. */
2576         retval = mxser_initbrd(brd, pdev);
2577         if (retval)
2578                 goto err_null;
2579
2580         for (i = 0; i < brd->info->nports; i++)
2581                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2582
2583         pci_set_drvdata(pdev, brd);
2584
2585         return 0;
2586 err_relio:
2587         pci_release_region(pdev, 2);
2588 err_null:
2589         brd->info = NULL;
2590 err:
2591         return retval;
2592 #else
2593         return -ENODEV;
2594 #endif
2595 }
2596
2597 static void __devexit mxser_remove(struct pci_dev *pdev)
2598 {
2599         struct mxser_board *brd = pci_get_drvdata(pdev);
2600         unsigned int i;
2601
2602         for (i = 0; i < brd->info->nports; i++)
2603                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2604
2605         mxser_release_res(brd, pdev, 1);
2606         brd->info = NULL;
2607 }
2608
2609 static struct pci_driver mxser_driver = {
2610         .name = "mxser",
2611         .id_table = mxser_pcibrds,
2612         .probe = mxser_probe,
2613         .remove = __devexit_p(mxser_remove)
2614 };
2615
2616 static int __init mxser_module_init(void)
2617 {
2618         struct mxser_board *brd;
2619         unsigned long cap;
2620         unsigned int i, m, isaloop;
2621         int retval, b;
2622
2623         pr_debug("Loading module mxser ...\n");
2624
2625         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2626         if (!mxvar_sdriver)
2627                 return -ENOMEM;
2628
2629         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2630                 MXSER_VERSION);
2631
2632         /* Initialize the tty_driver structure */
2633         mxvar_sdriver->owner = THIS_MODULE;
2634         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2635         mxvar_sdriver->name = "ttyMI";
2636         mxvar_sdriver->major = ttymajor;
2637         mxvar_sdriver->minor_start = 0;
2638         mxvar_sdriver->num = MXSER_PORTS + 1;
2639         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2640         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2641         mxvar_sdriver->init_termios = tty_std_termios;
2642         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2643         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2644         tty_set_operations(mxvar_sdriver, &mxser_ops);
2645
2646         retval = tty_register_driver(mxvar_sdriver);
2647         if (retval) {
2648                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2649                                 "tty driver !\n");
2650                 goto err_put;
2651         }
2652
2653         mxvar_diagflag = 0;
2654
2655         m = 0;
2656         /* Start finding ISA boards here */
2657         for (isaloop = 0; isaloop < 2; isaloop++)
2658                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2659                         if (!isaloop)
2660                                 cap = mxserBoardCAP[b]; /* predefined */
2661                         else
2662                                 cap = ioaddr[b]; /* module param */
2663
2664                         if (!cap)
2665                                 continue;
2666
2667                         brd = &mxser_boards[m];
2668                         retval = mxser_get_ISA_conf(cap, brd);
2669
2670                         if (retval != 0)
2671                                 printk(KERN_INFO "Found MOXA %s board "
2672                                         "(CAP=0x%x)\n",
2673                                         brd->info->name, ioaddr[b]);
2674
2675                         if (retval <= 0) {
2676                                 if (retval == MXSER_ERR_IRQ)
2677                                         printk(KERN_ERR "Invalid interrupt "
2678                                                 "number, board not "
2679                                                 "configured\n");
2680                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2681                                         printk(KERN_ERR "Invalid interrupt "
2682                                                 "number, board not "
2683                                                 "configured\n");
2684                                 else if (retval == MXSER_ERR_VECTOR)
2685                                         printk(KERN_ERR "Invalid interrupt "
2686                                                 "vector, board not "
2687                                                 "configured\n");
2688                                 else if (retval == MXSER_ERR_IOADDR)
2689                                         printk(KERN_ERR "Invalid I/O address, "
2690                                                 "board not configured\n");
2691
2692                                 brd->info = NULL;
2693                                 continue;
2694                         }
2695
2696                         /* mxser_initbrd will hook ISR. */
2697                         if (mxser_initbrd(brd, NULL) < 0) {
2698                                 brd->info = NULL;
2699                                 continue;
2700                         }
2701
2702                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2703                         for (i = 0; i < brd->info->nports; i++)
2704                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2705                                                 NULL);
2706
2707                         m++;
2708                 }
2709
2710         retval = pci_register_driver(&mxser_driver);
2711         if (retval) {
2712                 printk(KERN_ERR "Can't register pci driver\n");
2713                 if (!m) {
2714                         retval = -ENODEV;
2715                         goto err_unr;
2716                 } /* else: we have some ISA cards under control */
2717         }
2718
2719         pr_debug("Done.\n");
2720
2721         return 0;
2722 err_unr:
2723         tty_unregister_driver(mxvar_sdriver);
2724 err_put:
2725         put_tty_driver(mxvar_sdriver);
2726         return retval;
2727 }
2728
2729 static void __exit mxser_module_exit(void)
2730 {
2731         unsigned int i, j;
2732
2733         pr_debug("Unloading module mxser ...\n");
2734
2735         pci_unregister_driver(&mxser_driver);
2736
2737         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2738                 if (mxser_boards[i].info != NULL)
2739                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2740                                 tty_unregister_device(mxvar_sdriver,
2741                                                 mxser_boards[i].idx + j);
2742         tty_unregister_driver(mxvar_sdriver);
2743         put_tty_driver(mxvar_sdriver);
2744
2745         for (i = 0; i < MXSER_BOARDS; i++)
2746                 if (mxser_boards[i].info != NULL)
2747                         mxser_release_res(&mxser_boards[i], NULL, 1);
2748
2749         pr_debug("Done.\n");
2750 }
2751
2752 module_init(mxser_module_init);
2753 module_exit(mxser_module_exit);