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   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 /*
 931  * This routine is called when the serial port gets closed.  First, we
 932  * wait for the last remaining data to be sent.  Then, we unlink its
 933  * async structure from the interrupt chain if necessary, and we free
 934  * that IRQ if nothing is left in the chain.
 935  */
 936 static void mxser_close(struct tty_struct *tty, struct file *filp)
 937 {
 938         struct mxser_port *info = tty->driver_data;
 939
 940         unsigned long timeout;
 941         unsigned long flags;
 942
 943         if (tty->index == MXSER_PORTS)
 944                 return;
 945         if (!info)
 946                 return;
 947
 948         spin_lock_irqsave(&info->slock, flags);
 949
 950         if (tty_hung_up_p(filp)) {
 951                 spin_unlock_irqrestore(&info->slock, flags);
 952                 return;
 953         }
 954         if ((tty->count == 1) && (info->count != 1)) {
 955                 /*
 956                  * Uh, oh.  tty->count is 1, which means that the tty
 957                  * structure will be freed.  Info->count should always
 958                  * be one in these conditions.  If it's greater than
 959                  * one, we've got real problems, since it means the
 960                  * serial port won't be shutdown.
 961                  */
 962                 printk(KERN_ERR "mxser_close: bad serial port count; "
 963                         "tty->count is 1, info->count is %d\n", info->count);
 964                 info->count = 1;
 965         }
 966         if (--info->count < 0) {
 967                 printk(KERN_ERR "mxser_close: bad serial port count for "
 968                         "ttys%d: %d\n", tty->index, info->count);
 969                 info->count = 0;
 970         }
 971         if (info->count) {
 972                 spin_unlock_irqrestore(&info->slock, flags);
 973                 return;
 974         }
 975         info->flags |= ASYNC_CLOSING;
 976         spin_unlock_irqrestore(&info->slock, flags);
 977         /*
 978          * Save the termios structure, since this port may have
 979          * separate termios for callout and dialin.
 980          */
 981         if (info->flags & ASYNC_NORMAL_ACTIVE)
 982                 info->normal_termios = *tty->termios;
 983         /*
 984          * Now we wait for the transmit buffer to clear; and we notify
 985          * the line discipline to only process XON/XOFF characters.
 986          */
 987         tty->closing = 1;
 988         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
 989                 tty_wait_until_sent(tty, info->closing_wait);
 990         /*
 991          * At this point we stop accepting input.  To do this, we
 992          * disable the receive line status interrupts, and tell the
 993          * interrupt driver to stop checking the data ready bit in the
 994          * line status register.
 995          */
 996         info->IER &= ~UART_IER_RLSI;
 997         if (info->board->chip_flag)
 998                 info->IER &= ~MOXA_MUST_RECV_ISR;
 999
1000         if (info->flags & ASYNC_INITIALIZED) {
1001                 outb(info->IER, info->ioaddr + UART_IER);
1002                 /*
1003                  * Before we drop DTR, make sure the UART transmitter
1004                  * has completely drained; this is especially
1005                  * important if there is a transmit FIFO!
1006                  */
1007                 timeout = jiffies + HZ;
1008                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1009                         schedule_timeout_interruptible(5);
1010                         if (time_after(jiffies, timeout))
1011                                 break;
1012                 }
1013         }
1014         mxser_shutdown(info);
1015
1016         if (tty->driver->flush_buffer)
1017                 tty->driver->flush_buffer(tty);
1018
1019         tty_ldisc_flush(tty);
1020
1021         tty->closing = 0;
1022         info->event = 0;
1023         info->tty = NULL;
1024         if (info->blocked_open) {
1025                 if (info->close_delay)
1026                         schedule_timeout_interruptible(info->close_delay);
1027                 wake_up_interruptible(&info->open_wait);
1028         }
1029
1030         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1031 }
1032
1033 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1034 {
1035         int c, total = 0;
1036         struct mxser_port *info = tty->driver_data;
1037         unsigned long flags;
1038
1039         if (!info->xmit_buf)
1040                 return 0;
1041
1042         while (1) {
1043                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1044                                           SERIAL_XMIT_SIZE - info->xmit_head));
1045                 if (c <= 0)
1046                         break;
1047
1048                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1049                 spin_lock_irqsave(&info->slock, flags);
1050                 info->xmit_head = (info->xmit_head + c) &
1051                                   (SERIAL_XMIT_SIZE - 1);
1052                 info->xmit_cnt += c;
1053                 spin_unlock_irqrestore(&info->slock, flags);
1054
1055                 buf += c;
1056                 count -= c;
1057                 total += c;
1058         }
1059
1060         if (info->xmit_cnt && !tty->stopped) {
1061                 if (!tty->hw_stopped ||
1062                                 (info->type == PORT_16550A) ||
1063                                 (info->board->chip_flag)) {
1064                         spin_lock_irqsave(&info->slock, flags);
1065                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1066                                         UART_IER);
1067                         info->IER |= UART_IER_THRI;
1068                         outb(info->IER, info->ioaddr + UART_IER);
1069                         spin_unlock_irqrestore(&info->slock, flags);
1070                 }
1071         }
1072         return total;
1073 }
1074
1075 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1076 {
1077         struct mxser_port *info = tty->driver_data;
1078         unsigned long flags;
1079
1080         if (!info->xmit_buf)
1081                 return;
1082
1083         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1084                 return;
1085
1086         spin_lock_irqsave(&info->slock, flags);
1087         info->xmit_buf[info->xmit_head++] = ch;
1088         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1089         info->xmit_cnt++;
1090         spin_unlock_irqrestore(&info->slock, flags);
1091         if (!tty->stopped) {
1092                 if (!tty->hw_stopped ||
1093                                 (info->type == PORT_16550A) ||
1094                                 info->board->chip_flag) {
1095                         spin_lock_irqsave(&info->slock, flags);
1096                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1097                         info->IER |= UART_IER_THRI;
1098                         outb(info->IER, info->ioaddr + UART_IER);
1099                         spin_unlock_irqrestore(&info->slock, flags);
1100                 }
1101         }
1102 }
1103
1104
1105 static void mxser_flush_chars(struct tty_struct *tty)
1106 {
1107         struct mxser_port *info = tty->driver_data;
1108         unsigned long flags;
1109
1110         if (info->xmit_cnt <= 0 ||
1111                         tty->stopped ||
1112                         !info->xmit_buf ||
1113                         (tty->hw_stopped &&
1114                          (info->type != PORT_16550A) &&
1115                          (!info->board->chip_flag)
1116                         ))
1117                 return;
1118
1119         spin_lock_irqsave(&info->slock, flags);
1120
1121         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1122         info->IER |= UART_IER_THRI;
1123         outb(info->IER, info->ioaddr + UART_IER);
1124
1125         spin_unlock_irqrestore(&info->slock, flags);
1126 }
1127
1128 static int mxser_write_room(struct tty_struct *tty)
1129 {
1130         struct mxser_port *info = tty->driver_data;
1131         int ret;
1132
1133         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1134         if (ret < 0)
1135                 ret = 0;
1136         return ret;
1137 }
1138
1139 static int mxser_chars_in_buffer(struct tty_struct *tty)
1140 {
1141         struct mxser_port *info = tty->driver_data;
1142         return info->xmit_cnt;
1143 }
1144
1145 static void mxser_flush_buffer(struct tty_struct *tty)
1146 {
1147         struct mxser_port *info = tty->driver_data;
1148         char fcr;
1149         unsigned long flags;
1150
1151
1152         spin_lock_irqsave(&info->slock, flags);
1153         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1154
1155         fcr = inb(info->ioaddr + UART_FCR);
1156         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1157                 info->ioaddr + UART_FCR);
1158         outb(fcr, info->ioaddr + UART_FCR);
1159
1160         spin_unlock_irqrestore(&info->slock, flags);
1161
1162         tty_wakeup(tty);
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
1464         switch (cmd) {
1465         case MOXA_GET_MAJOR:
1466                 return put_user(ttymajor, (int __user *)argp);
1467
1468         case MOXA_CHKPORTENABLE:
1469                 result = 0;
1470
1471                 for (i = 0; i < MXSER_BOARDS; i++)
1472                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1473                                 if (mxser_boards[i].ports[j].ioaddr)
1474                                         result |= (1 << i);
1475
1476                 return put_user(result, (unsigned long __user *)argp);
1477         case MOXA_GETDATACOUNT:
1478                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1479                         return -EFAULT;
1480                 return 0;
1481         case MOXA_GETMSTATUS:
1482                 for (i = 0; i < MXSER_BOARDS; i++)
1483                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1484                                 port = &mxser_boards[i].ports[j];
1485
1486                                 GMStatus[i].ri = 0;
1487                                 if (!port->ioaddr) {
1488                                         GMStatus[i].dcd = 0;
1489                                         GMStatus[i].dsr = 0;
1490                                         GMStatus[i].cts = 0;
1491                                         continue;
1492                                 }
1493
1494                                 if (!port->tty || !port->tty->termios)
1495                                         GMStatus[i].cflag =
1496                                                 port->normal_termios.c_cflag;
1497                                 else
1498                                         GMStatus[i].cflag =
1499                                                 port->tty->termios->c_cflag;
1500
1501                                 status = inb(port->ioaddr + UART_MSR);
1502                                 if (status & 0x80 /*UART_MSR_DCD */ )
1503                                         GMStatus[i].dcd = 1;
1504                                 else
1505                                         GMStatus[i].dcd = 0;
1506
1507                                 if (status & 0x20 /*UART_MSR_DSR */ )
1508                                         GMStatus[i].dsr = 1;
1509                                 else
1510                                         GMStatus[i].dsr = 0;
1511
1512
1513                                 if (status & 0x10 /*UART_MSR_CTS */ )
1514                                         GMStatus[i].cts = 1;
1515                                 else
1516                                         GMStatus[i].cts = 0;
1517                         }
1518                 if (copy_to_user(argp, GMStatus,
1519                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1520                         return -EFAULT;
1521                 return 0;
1522         case MOXA_ASPP_MON_EXT: {
1523                 int p, shiftbit;
1524                 unsigned long opmode;
1525                 unsigned cflag, iflag;
1526
1527                 for (i = 0; i < MXSER_BOARDS; i++)
1528                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1529                                 port = &mxser_boards[i].ports[j];
1530                                 if (!port->ioaddr)
1531                                         continue;
1532
1533                                 status = mxser_get_msr(port->ioaddr, 0, i);
1534
1535                                 if (status & UART_MSR_TERI)
1536                                         port->icount.rng++;
1537                                 if (status & UART_MSR_DDSR)
1538                                         port->icount.dsr++;
1539                                 if (status & UART_MSR_DDCD)
1540                                         port->icount.dcd++;
1541                                 if (status & UART_MSR_DCTS)
1542                                         port->icount.cts++;
1543
1544                                 port->mon_data.modem_status = status;
1545                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1546                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1547                                 mon_data_ext.up_rxcnt[i] =
1548                                         port->mon_data.up_rxcnt;
1549                                 mon_data_ext.up_txcnt[i] =
1550                                         port->mon_data.up_txcnt;
1551                                 mon_data_ext.modem_status[i] =
1552                                         port->mon_data.modem_status;
1553                                 mon_data_ext.baudrate[i] =
1554                                         tty_get_baud_rate(port->tty);
1555
1556                                 if (!port->tty || !port->tty->termios) {
1557                                         cflag = port->normal_termios.c_cflag;
1558                                         iflag = port->normal_termios.c_iflag;
1559                                 } else {
1560                                         cflag = port->tty->termios->c_cflag;
1561                                         iflag = port->tty->termios->c_iflag;
1562                                 }
1563
1564                                 mon_data_ext.databits[i] = cflag & CSIZE;
1565
1566                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1567
1568                                 mon_data_ext.parity[i] =
1569                                         cflag & (PARENB | PARODD | CMSPAR);
1570
1571                                 mon_data_ext.flowctrl[i] = 0x00;
1572
1573                                 if (cflag & CRTSCTS)
1574                                         mon_data_ext.flowctrl[i] |= 0x03;
1575
1576                                 if (iflag & (IXON | IXOFF))
1577                                         mon_data_ext.flowctrl[i] |= 0x0C;
1578
1579                                 if (port->type == PORT_16550A)
1580                                         mon_data_ext.fifo[i] = 1;
1581                                 else
1582                                         mon_data_ext.fifo[i] = 0;
1583
1584                                 p = i % 4;
1585                                 shiftbit = p * 2;
1586                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1587                                 opmode &= OP_MODE_MASK;
1588
1589                                 mon_data_ext.iftype[i] = opmode;
1590
1591                         }
1592                         if (copy_to_user(argp, &mon_data_ext,
1593                                                 sizeof(mon_data_ext)))
1594                                 return -EFAULT;
1595
1596                         return 0;
1597
1598         } default:
1599                 return -ENOIOCTLCMD;
1600         }
1601         return 0;
1602 }
1603
1604 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1605                 struct async_icount *cprev)
1606 {
1607         struct async_icount cnow;
1608         unsigned long flags;
1609         int ret;
1610
1611         spin_lock_irqsave(&info->slock, flags);
1612         cnow = info->icount;    /* atomic copy */
1613         spin_unlock_irqrestore(&info->slock, flags);
1614
1615         ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1616                 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1617                 ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1618                 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1619
1620         *cprev = cnow;
1621
1622         return ret;
1623 }
1624
1625 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1626                 unsigned int cmd, unsigned long arg)
1627 {
1628         struct mxser_port *info = tty->driver_data;
1629         struct async_icount cnow;
1630         struct serial_icounter_struct __user *p_cuser;
1631         unsigned long flags;
1632         void __user *argp = (void __user *)arg;
1633         int retval;
1634
1635         if (tty->index == MXSER_PORTS)
1636                 return mxser_ioctl_special(cmd, argp);
1637
1638         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1639                 int p;
1640                 unsigned long opmode;
1641                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1642                 int shiftbit;
1643                 unsigned char val, mask;
1644
1645                 p = tty->index % 4;
1646                 if (cmd == MOXA_SET_OP_MODE) {
1647                         if (get_user(opmode, (int __user *) argp))
1648                                 return -EFAULT;
1649                         if (opmode != RS232_MODE &&
1650                                         opmode != RS485_2WIRE_MODE &&
1651                                         opmode != RS422_MODE &&
1652                                         opmode != RS485_4WIRE_MODE)
1653                                 return -EFAULT;
1654                         mask = ModeMask[p];
1655                         shiftbit = p * 2;
1656                         val = inb(info->opmode_ioaddr);
1657                         val &= mask;
1658                         val |= (opmode << shiftbit);
1659                         outb(val, info->opmode_ioaddr);
1660                 } else {
1661                         shiftbit = p * 2;
1662                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1663                         opmode &= OP_MODE_MASK;
1664                         if (put_user(opmode, (int __user *)argp))
1665                                 return -EFAULT;
1666                 }
1667                 return 0;
1668         }
1669
1670         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1671                         test_bit(TTY_IO_ERROR, &tty->flags))
1672                 return -EIO;
1673
1674         switch (cmd) {
1675         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1676                 retval = tty_check_change(tty);
1677                 if (retval)
1678                         return retval;
1679                 tty_wait_until_sent(tty, 0);
1680                 if (!arg)
1681                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1682                 return 0;
1683         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1684                 retval = tty_check_change(tty);
1685                 if (retval)
1686                         return retval;
1687                 tty_wait_until_sent(tty, 0);
1688                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1689                 return 0;
1690         case TIOCGSOFTCAR:
1691                 return put_user(!!C_CLOCAL(tty), (unsigned long __user *)argp);
1692         case TIOCSSOFTCAR:
1693                 if (get_user(arg, (unsigned long __user *)argp))
1694                         return -EFAULT;
1695                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1696                 return 0;
1697         case TIOCGSERIAL:
1698                 return mxser_get_serial_info(info, argp);
1699         case TIOCSSERIAL:
1700                 return mxser_set_serial_info(info, argp);
1701         case TIOCSERGETLSR:     /* Get line status register */
1702                 return mxser_get_lsr_info(info, argp);
1703                 /*
1704                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1705                  * - mask passed in arg for lines of interest
1706                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1707                  * Caller should use TIOCGICOUNT to see which one it was
1708                  */
1709         case TIOCMIWAIT:
1710                 spin_lock_irqsave(&info->slock, flags);
1711                 cnow = info->icount;    /* note the counters on entry */
1712                 spin_unlock_irqrestore(&info->slock, flags);
1713
1714                 return wait_event_interruptible(info->delta_msr_wait,
1715                                 mxser_cflags_changed(info, arg, &cnow));
1716         /*
1717          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1718          * Return: write counters to the user passed counter struct
1719          * NB: both 1->0 and 0->1 transitions are counted except for
1720          *     RI where only 0->1 is counted.
1721          */
1722         case TIOCGICOUNT:
1723                 spin_lock_irqsave(&info->slock, flags);
1724                 cnow = info->icount;
1725                 spin_unlock_irqrestore(&info->slock, flags);
1726                 p_cuser = argp;
1727                 if (put_user(cnow.frame, &p_cuser->frame))
1728                         return -EFAULT;
1729                 if (put_user(cnow.brk, &p_cuser->brk))
1730                         return -EFAULT;
1731                 if (put_user(cnow.overrun, &p_cuser->overrun))
1732                         return -EFAULT;
1733                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1734                         return -EFAULT;
1735                 if (put_user(cnow.parity, &p_cuser->parity))
1736                         return -EFAULT;
1737                 if (put_user(cnow.rx, &p_cuser->rx))
1738                         return -EFAULT;
1739                 if (put_user(cnow.tx, &p_cuser->tx))
1740                         return -EFAULT;
1741                 put_user(cnow.cts, &p_cuser->cts);
1742                 put_user(cnow.dsr, &p_cuser->dsr);
1743                 put_user(cnow.rng, &p_cuser->rng);
1744                 put_user(cnow.dcd, &p_cuser->dcd);
1745                 return 0;
1746         case MOXA_HighSpeedOn:
1747                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1748         case MOXA_SDS_RSTICOUNTER:
1749                 info->mon_data.rxcnt = 0;
1750                 info->mon_data.txcnt = 0;
1751                 return 0;
1752
1753         case MOXA_ASPP_OQUEUE:{
1754                 int len, lsr;
1755
1756                 len = mxser_chars_in_buffer(tty);
1757
1758                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1759
1760                 len += (lsr ? 0 : 1);
1761
1762                 return put_user(len, (int __user *)argp);
1763         }
1764         case MOXA_ASPP_MON: {
1765                 int mcr, status;
1766
1767                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1768                 mxser_check_modem_status(info, status);
1769
1770                 mcr = inb(info->ioaddr + UART_MCR);
1771                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1772                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1773                 else
1774                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1775
1776                 if (mcr & MOXA_MUST_MCR_TX_XON)
1777                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1778                 else
1779                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1780
1781                 if (info->tty->hw_stopped)
1782                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1783                 else
1784                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1785
1786                 if (copy_to_user(argp, &info->mon_data,
1787                                 sizeof(struct mxser_mon)))
1788                         return -EFAULT;
1789
1790                 return 0;
1791         }
1792         case MOXA_ASPP_LSTATUS: {
1793                 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1794                         return -EFAULT;
1795
1796                 info->err_shadow = 0;
1797                 return 0;
1798         }
1799         case MOXA_SET_BAUD_METHOD: {
1800                 int method;
1801
1802                 if (get_user(method, (int __user *)argp))
1803                         return -EFAULT;
1804                 mxser_set_baud_method[tty->index] = method;
1805                 return put_user(method, (int __user *)argp);
1806         }
1807         default:
1808                 return -ENOIOCTLCMD;
1809         }
1810         return 0;
1811 }
1812
1813 static void mxser_stoprx(struct tty_struct *tty)
1814 {
1815         struct mxser_port *info = tty->driver_data;
1816
1817         info->ldisc_stop_rx = 1;
1818         if (I_IXOFF(tty)) {
1819                 if (info->board->chip_flag) {
1820                         info->IER &= ~MOXA_MUST_RECV_ISR;
1821                         outb(info->IER, info->ioaddr + UART_IER);
1822                 } else {
1823                         info->x_char = STOP_CHAR(tty);
1824                         outb(0, info->ioaddr + UART_IER);
1825                         info->IER |= UART_IER_THRI;
1826                         outb(info->IER, info->ioaddr + UART_IER);
1827                 }
1828         }
1829
1830         if (info->tty->termios->c_cflag & CRTSCTS) {
1831                 info->MCR &= ~UART_MCR_RTS;
1832                 outb(info->MCR, info->ioaddr + UART_MCR);
1833         }
1834 }
1835
1836 /*
1837  * This routine is called by the upper-layer tty layer to signal that
1838  * incoming characters should be throttled.
1839  */
1840 static void mxser_throttle(struct tty_struct *tty)
1841 {
1842         mxser_stoprx(tty);
1843 }
1844
1845 static void mxser_unthrottle(struct tty_struct *tty)
1846 {
1847         struct mxser_port *info = tty->driver_data;
1848
1849         /* startrx */
1850         info->ldisc_stop_rx = 0;
1851         if (I_IXOFF(tty)) {
1852                 if (info->x_char)
1853                         info->x_char = 0;
1854                 else {
1855                         if (info->board->chip_flag) {
1856                                 info->IER |= MOXA_MUST_RECV_ISR;
1857                                 outb(info->IER, info->ioaddr + UART_IER);
1858                         } else {
1859                                 info->x_char = START_CHAR(tty);
1860                                 outb(0, info->ioaddr + UART_IER);
1861                                 info->IER |= UART_IER_THRI;
1862                                 outb(info->IER, info->ioaddr + UART_IER);
1863                         }
1864                 }
1865         }
1866
1867         if (info->tty->termios->c_cflag & CRTSCTS) {
1868                 info->MCR |= UART_MCR_RTS;
1869                 outb(info->MCR, info->ioaddr + UART_MCR);
1870         }
1871 }
1872
1873 /*
1874  * mxser_stop() and mxser_start()
1875  *
1876  * This routines are called before setting or resetting tty->stopped.
1877  * They enable or disable transmitter interrupts, as necessary.
1878  */
1879 static void mxser_stop(struct tty_struct *tty)
1880 {
1881         struct mxser_port *info = tty->driver_data;
1882         unsigned long flags;
1883
1884         spin_lock_irqsave(&info->slock, flags);
1885         if (info->IER & UART_IER_THRI) {
1886                 info->IER &= ~UART_IER_THRI;
1887                 outb(info->IER, info->ioaddr + UART_IER);
1888         }
1889         spin_unlock_irqrestore(&info->slock, flags);
1890 }
1891
1892 static void mxser_start(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->xmit_cnt && info->xmit_buf) {
1899                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1900                 info->IER |= UART_IER_THRI;
1901                 outb(info->IER, info->ioaddr + UART_IER);
1902         }
1903         spin_unlock_irqrestore(&info->slock, flags);
1904 }
1905
1906 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1907 {
1908         struct mxser_port *info = tty->driver_data;
1909         unsigned long flags;
1910
1911         spin_lock_irqsave(&info->slock, flags);
1912         mxser_change_speed(info, old_termios);
1913         spin_unlock_irqrestore(&info->slock, flags);
1914
1915         if ((old_termios->c_cflag & CRTSCTS) &&
1916                         !(tty->termios->c_cflag & CRTSCTS)) {
1917                 tty->hw_stopped = 0;
1918                 mxser_start(tty);
1919         }
1920
1921         /* Handle sw stopped */
1922         if ((old_termios->c_iflag & IXON) &&
1923                         !(tty->termios->c_iflag & IXON)) {
1924                 tty->stopped = 0;
1925
1926                 if (info->board->chip_flag) {
1927                         spin_lock_irqsave(&info->slock, flags);
1928                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1929                         spin_unlock_irqrestore(&info->slock, flags);
1930                 }
1931
1932                 mxser_start(tty);
1933         }
1934 }
1935
1936 /*
1937  * mxser_wait_until_sent() --- wait until the transmitter is empty
1938  */
1939 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1940 {
1941         struct mxser_port *info = tty->driver_data;
1942         unsigned long orig_jiffies, char_time;
1943         int lsr;
1944
1945         if (info->type == PORT_UNKNOWN)
1946                 return;
1947
1948         if (info->xmit_fifo_size == 0)
1949                 return;         /* Just in case.... */
1950
1951         orig_jiffies = jiffies;
1952         /*
1953          * Set the check interval to be 1/5 of the estimated time to
1954          * send a single character, and make it at least 1.  The check
1955          * interval should also be less than the timeout.
1956          *
1957          * Note: we have to use pretty tight timings here to satisfy
1958          * the NIST-PCTS.
1959          */
1960         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1961         char_time = char_time / 5;
1962         if (char_time == 0)
1963                 char_time = 1;
1964         if (timeout && timeout < char_time)
1965                 char_time = timeout;
1966         /*
1967          * If the transmitter hasn't cleared in twice the approximate
1968          * amount of time to send the entire FIFO, it probably won't
1969          * ever clear.  This assumes the UART isn't doing flow
1970          * control, which is currently the case.  Hence, if it ever
1971          * takes longer than info->timeout, this is probably due to a
1972          * UART bug of some kind.  So, we clamp the timeout parameter at
1973          * 2*info->timeout.
1974          */
1975         if (!timeout || timeout > 2 * info->timeout)
1976                 timeout = 2 * info->timeout;
1977 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1978         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1979                 timeout, char_time);
1980         printk("jiff=%lu...", jiffies);
1981 #endif
1982         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1983 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1984                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1985 #endif
1986                 schedule_timeout_interruptible(char_time);
1987                 if (signal_pending(current))
1988                         break;
1989                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1990                         break;
1991         }
1992         set_current_state(TASK_RUNNING);
1993
1994 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1995         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1996 #endif
1997 }
1998
1999 /*
2000  * This routine is called by tty_hangup() when a hangup is signaled.
2001  */
2002 static void mxser_hangup(struct tty_struct *tty)
2003 {
2004         struct mxser_port *info = tty->driver_data;
2005
2006         mxser_flush_buffer(tty);
2007         mxser_shutdown(info);
2008         info->event = 0;
2009         info->count = 0;
2010         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2011         info->tty = NULL;
2012         wake_up_interruptible(&info->open_wait);
2013 }
2014
2015 /*
2016  * mxser_rs_break() --- routine which turns the break handling on or off
2017  */
2018 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2019 {
2020         struct mxser_port *info = tty->driver_data;
2021         unsigned long flags;
2022
2023         spin_lock_irqsave(&info->slock, flags);
2024         if (break_state == -1)
2025                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2026                         info->ioaddr + UART_LCR);
2027         else
2028                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2029                         info->ioaddr + UART_LCR);
2030         spin_unlock_irqrestore(&info->slock, flags);
2031 }
2032
2033 static void mxser_receive_chars(struct mxser_port *port, int *status)
2034 {
2035         struct tty_struct *tty = port->tty;
2036         unsigned char ch, gdl;
2037         int ignored = 0;
2038         int cnt = 0;
2039         int recv_room;
2040         int max = 256;
2041
2042         recv_room = tty->receive_room;
2043         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2044                 mxser_stoprx(tty);
2045
2046         if (port->board->chip_flag != MOXA_OTHER_UART) {
2047
2048                 if (*status & UART_LSR_SPECIAL)
2049                         goto intr_old;
2050                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2051                                 (*status & MOXA_MUST_LSR_RERR))
2052                         goto intr_old;
2053                 if (*status & MOXA_MUST_LSR_RERR)
2054                         goto intr_old;
2055
2056                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2057
2058                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2059                         gdl &= MOXA_MUST_GDL_MASK;
2060                 if (gdl >= recv_room) {
2061                         if (!port->ldisc_stop_rx)
2062                                 mxser_stoprx(tty);
2063                 }
2064                 while (gdl--) {
2065                         ch = inb(port->ioaddr + UART_RX);
2066                         tty_insert_flip_char(tty, ch, 0);
2067                         cnt++;
2068                 }
2069                 goto end_intr;
2070         }
2071 intr_old:
2072
2073         do {
2074                 if (max-- < 0)
2075                         break;
2076
2077                 ch = inb(port->ioaddr + UART_RX);
2078                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2079                         outb(0x23, port->ioaddr + UART_FCR);
2080                 *status &= port->read_status_mask;
2081                 if (*status & port->ignore_status_mask) {
2082                         if (++ignored > 100)
2083                                 break;
2084                 } else {
2085                         char flag = 0;
2086                         if (*status & UART_LSR_SPECIAL) {
2087                                 if (*status & UART_LSR_BI) {
2088                                         flag = TTY_BREAK;
2089                                         port->icount.brk++;
2090
2091                                         if (port->flags & ASYNC_SAK)
2092                                                 do_SAK(tty);
2093                                 } else if (*status & UART_LSR_PE) {
2094                                         flag = TTY_PARITY;
2095                                         port->icount.parity++;
2096                                 } else if (*status & UART_LSR_FE) {
2097                                         flag = TTY_FRAME;
2098                                         port->icount.frame++;
2099                                 } else if (*status & UART_LSR_OE) {
2100                                         flag = TTY_OVERRUN;
2101                                         port->icount.overrun++;
2102                                 } else
2103                                         flag = TTY_BREAK;
2104                         }
2105                         tty_insert_flip_char(tty, ch, flag);
2106                         cnt++;
2107                         if (cnt >= recv_room) {
2108                                 if (!port->ldisc_stop_rx)
2109                                         mxser_stoprx(tty);
2110                                 break;
2111                         }
2112
2113                 }
2114
2115                 if (port->board->chip_flag)
2116                         break;
2117
2118                 *status = inb(port->ioaddr + UART_LSR);
2119         } while (*status & UART_LSR_DR);
2120
2121 end_intr:
2122         mxvar_log.rxcnt[port->tty->index] += cnt;
2123         port->mon_data.rxcnt += cnt;
2124         port->mon_data.up_rxcnt += cnt;
2125
2126         /*
2127          * We are called from an interrupt context with &port->slock
2128          * being held. Drop it temporarily in order to prevent
2129          * recursive locking.
2130          */
2131         spin_unlock(&port->slock);
2132         tty_flip_buffer_push(tty);
2133         spin_lock(&port->slock);
2134 }
2135
2136 static void mxser_transmit_chars(struct mxser_port *port)
2137 {
2138         int count, cnt;
2139
2140         if (port->x_char) {
2141                 outb(port->x_char, port->ioaddr + UART_TX);
2142                 port->x_char = 0;
2143                 mxvar_log.txcnt[port->tty->index]++;
2144                 port->mon_data.txcnt++;
2145                 port->mon_data.up_txcnt++;
2146                 port->icount.tx++;
2147                 return;
2148         }
2149
2150         if (port->xmit_buf == NULL)
2151                 return;
2152
2153         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2154                         (port->tty->hw_stopped &&
2155                         (port->type != PORT_16550A) &&
2156                         (!port->board->chip_flag))) {
2157                 port->IER &= ~UART_IER_THRI;
2158                 outb(port->IER, port->ioaddr + UART_IER);
2159                 return;
2160         }
2161
2162         cnt = port->xmit_cnt;
2163         count = port->xmit_fifo_size;
2164         do {
2165                 outb(port->xmit_buf[port->xmit_tail++],
2166                         port->ioaddr + UART_TX);
2167                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2168                 if (--port->xmit_cnt <= 0)
2169                         break;
2170         } while (--count > 0);
2171         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2172
2173         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2174         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2175         port->icount.tx += (cnt - port->xmit_cnt);
2176
2177         if (port->xmit_cnt < WAKEUP_CHARS)
2178                 tty_wakeup(port->tty);
2179
2180         if (port->xmit_cnt <= 0) {
2181                 port->IER &= ~UART_IER_THRI;
2182                 outb(port->IER, port->ioaddr + UART_IER);
2183         }
2184 }
2185
2186 /*
2187  * This is the serial driver's generic interrupt routine
2188  */
2189 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2190 {
2191         int status, iir, i;
2192         struct mxser_board *brd = NULL;
2193         struct mxser_port *port;
2194         int max, irqbits, bits, msr;
2195         unsigned int int_cnt, pass_counter = 0;
2196         int handled = IRQ_NONE;
2197
2198         for (i = 0; i < MXSER_BOARDS; i++)
2199                 if (dev_id == &mxser_boards[i]) {
2200                         brd = dev_id;
2201                         break;
2202                 }
2203
2204         if (i == MXSER_BOARDS)
2205                 goto irq_stop;
2206         if (brd == NULL)
2207                 goto irq_stop;
2208         max = brd->info->nports;
2209         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2210                 irqbits = inb(brd->vector) & brd->vector_mask;
2211                 if (irqbits == brd->vector_mask)
2212                         break;
2213
2214                 handled = IRQ_HANDLED;
2215                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2216                         if (irqbits == brd->vector_mask)
2217                                 break;
2218                         if (bits & irqbits)
2219                                 continue;
2220                         port = &brd->ports[i];
2221
2222                         int_cnt = 0;
2223                         spin_lock(&port->slock);
2224                         do {
2225                                 iir = inb(port->ioaddr + UART_IIR);
2226                                 if (iir & UART_IIR_NO_INT)
2227                                         break;
2228                                 iir &= MOXA_MUST_IIR_MASK;
2229                                 if (!port->tty ||
2230                                                 (port->flags & ASYNC_CLOSING) ||
2231                                                 !(port->flags &
2232                                                         ASYNC_INITIALIZED)) {
2233                                         status = inb(port->ioaddr + UART_LSR);
2234                                         outb(0x27, port->ioaddr + UART_FCR);
2235                                         inb(port->ioaddr + UART_MSR);
2236                                         break;
2237                                 }
2238
2239                                 status = inb(port->ioaddr + UART_LSR);
2240
2241                                 if (status & UART_LSR_PE)
2242                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2243                                 if (status & UART_LSR_FE)
2244                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2245                                 if (status & UART_LSR_OE)
2246                                         port->err_shadow |=
2247                                                 NPPI_NOTIFY_HW_OVERRUN;
2248                                 if (status & UART_LSR_BI)
2249                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2250
2251                                 if (port->board->chip_flag) {
2252                                         if (iir == MOXA_MUST_IIR_GDA ||
2253                                             iir == MOXA_MUST_IIR_RDA ||
2254                                             iir == MOXA_MUST_IIR_RTO ||
2255                                             iir == MOXA_MUST_IIR_LSR)
2256                                                 mxser_receive_chars(port,
2257                                                                 &status);
2258
2259                                 } else {
2260                                         status &= port->read_status_mask;
2261                                         if (status & UART_LSR_DR)
2262                                                 mxser_receive_chars(port,
2263                                                                 &status);
2264                                 }
2265                                 msr = inb(port->ioaddr + UART_MSR);
2266                                 if (msr & UART_MSR_ANY_DELTA)
2267                                         mxser_check_modem_status(port, msr);
2268
2269                                 if (port->board->chip_flag) {
2270                                         if (iir == 0x02 && (status &
2271                                                                 UART_LSR_THRE))
2272                                                 mxser_transmit_chars(port);
2273                                 } else {
2274                                         if (status & UART_LSR_THRE)
2275                                                 mxser_transmit_chars(port);
2276                                 }
2277                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2278                         spin_unlock(&port->slock);
2279                 }
2280         }
2281
2282 irq_stop:
2283         return handled;
2284 }
2285
2286 static const struct tty_operations mxser_ops = {
2287         .open = mxser_open,
2288         .close = mxser_close,
2289         .write = mxser_write,
2290         .put_char = mxser_put_char,
2291         .flush_chars = mxser_flush_chars,
2292         .write_room = mxser_write_room,
2293         .chars_in_buffer = mxser_chars_in_buffer,
2294         .flush_buffer = mxser_flush_buffer,
2295         .ioctl = mxser_ioctl,
2296         .throttle = mxser_throttle,
2297         .unthrottle = mxser_unthrottle,
2298         .set_termios = mxser_set_termios,
2299         .stop = mxser_stop,
2300         .start = mxser_start,
2301         .hangup = mxser_hangup,
2302         .break_ctl = mxser_rs_break,
2303         .wait_until_sent = mxser_wait_until_sent,
2304         .tiocmget = mxser_tiocmget,
2305         .tiocmset = mxser_tiocmset,
2306 };
2307
2308 /*
2309  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2310  */
2311
2312 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2313                 unsigned int irq)
2314 {
2315         if (irq)
2316                 free_irq(brd->irq, brd);
2317         if (pdev != NULL) {     /* PCI */
2318 #ifdef CONFIG_PCI
2319                 pci_release_region(pdev, 2);
2320                 pci_release_region(pdev, 3);
2321 #endif
2322         } else {
2323                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2324                 release_region(brd->vector, 1);
2325         }
2326 }
2327
2328 static int __devinit mxser_initbrd(struct mxser_board *brd,
2329                 struct pci_dev *pdev)
2330 {
2331         struct mxser_port *info;
2332         unsigned int i;
2333         int retval;
2334
2335         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2336
2337         for (i = 0; i < brd->info->nports; i++) {
2338                 info = &brd->ports[i];
2339                 info->board = brd;
2340                 info->stop_rx = 0;
2341                 info->ldisc_stop_rx = 0;
2342
2343                 /* Enhance mode enabled here */
2344                 if (brd->chip_flag != MOXA_OTHER_UART)
2345                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2346
2347                 info->flags = ASYNC_SHARE_IRQ;
2348                 info->type = brd->uart_type;
2349
2350                 process_txrx_fifo(info);
2351
2352                 info->custom_divisor = info->baud_base * 16;
2353                 info->close_delay = 5 * HZ / 10;
2354                 info->closing_wait = 30 * HZ;
2355                 info->normal_termios = mxvar_sdriver->init_termios;
2356                 init_waitqueue_head(&info->open_wait);
2357                 init_waitqueue_head(&info->delta_msr_wait);
2358                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2359                 info->err_shadow = 0;
2360                 spin_lock_init(&info->slock);
2361
2362                 /* before set INT ISR, disable all int */
2363                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2364                         info->ioaddr + UART_IER);
2365         }
2366
2367         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2368                         brd);
2369         if (retval) {
2370                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2371                         "conflict with another device.\n",
2372                         brd->info->name, brd->irq);
2373                 /* We hold resources, we need to release them. */
2374                 mxser_release_res(brd, pdev, 0);
2375         }
2376         return retval;
2377 }
2378
2379 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2380 {
2381         int id, i, bits;
2382         unsigned short regs[16], irq;
2383         unsigned char scratch, scratch2;
2384
2385         brd->chip_flag = MOXA_OTHER_UART;
2386
2387         id = mxser_read_register(cap, regs);
2388         switch (id) {
2389         case C168_ASIC_ID:
2390                 brd->info = &mxser_cards[0];
2391                 break;
2392         case C104_ASIC_ID:
2393                 brd->info = &mxser_cards[1];
2394                 break;
2395         case CI104J_ASIC_ID:
2396                 brd->info = &mxser_cards[2];
2397                 break;
2398         case C102_ASIC_ID:
2399                 brd->info = &mxser_cards[5];
2400                 break;
2401         case CI132_ASIC_ID:
2402                 brd->info = &mxser_cards[6];
2403                 break;
2404         case CI134_ASIC_ID:
2405                 brd->info = &mxser_cards[7];
2406                 break;
2407         default:
2408                 return 0;
2409         }
2410
2411         irq = 0;
2412         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2413            Flag-hack checks if configuration should be read as 2-port here. */
2414         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2415                 irq = regs[9] & 0xF000;
2416                 irq = irq | (irq >> 4);
2417                 if (irq != (regs[9] & 0xFF00))
2418                         return MXSER_ERR_IRQ_CONFLIT;
2419         } else if (brd->info->nports == 4) {
2420                 irq = regs[9] & 0xF000;
2421                 irq = irq | (irq >> 4);
2422                 irq = irq | (irq >> 8);
2423                 if (irq != regs[9])
2424                         return MXSER_ERR_IRQ_CONFLIT;
2425         } else if (brd->info->nports == 8) {
2426                 irq = regs[9] & 0xF000;
2427                 irq = irq | (irq >> 4);
2428                 irq = irq | (irq >> 8);
2429                 if ((irq != regs[9]) || (irq != regs[10]))
2430                         return MXSER_ERR_IRQ_CONFLIT;
2431         }
2432
2433         if (!irq)
2434                 return MXSER_ERR_IRQ;
2435         brd->irq = ((int)(irq & 0xF000) >> 12);
2436         for (i = 0; i < 8; i++)
2437                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2438         if ((regs[12] & 0x80) == 0)
2439                 return MXSER_ERR_VECTOR;
2440         brd->vector = (int)regs[11];    /* interrupt vector */
2441         if (id == 1)
2442                 brd->vector_mask = 0x00FF;
2443         else
2444                 brd->vector_mask = 0x000F;
2445         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2446                 if (regs[12] & bits) {
2447                         brd->ports[i].baud_base = 921600;
2448                         brd->ports[i].max_baud = 921600;
2449                 } else {
2450                         brd->ports[i].baud_base = 115200;
2451                         brd->ports[i].max_baud = 115200;
2452                 }
2453         }
2454         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2455         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2456         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2457         outb(scratch2, cap + UART_LCR);
2458         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2459         scratch = inb(cap + UART_IIR);
2460
2461         if (scratch & 0xC0)
2462                 brd->uart_type = PORT_16550A;
2463         else
2464                 brd->uart_type = PORT_16450;
2465         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2466                         "mxser(IO)"))
2467                 return MXSER_ERR_IOADDR;
2468         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2469                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2470                 return MXSER_ERR_VECTOR;
2471         }
2472         return brd->info->nports;
2473 }
2474
2475 static int __devinit mxser_probe(struct pci_dev *pdev,
2476                 const struct pci_device_id *ent)
2477 {
2478 #ifdef CONFIG_PCI
2479         struct mxser_board *brd;
2480         unsigned int i, j;
2481         unsigned long ioaddress;
2482         int retval = -EINVAL;
2483
2484         for (i = 0; i < MXSER_BOARDS; i++)
2485                 if (mxser_boards[i].info == NULL)
2486                         break;
2487
2488         if (i >= MXSER_BOARDS) {
2489                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2490                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2491                 goto err;
2492         }
2493
2494         brd = &mxser_boards[i];
2495         brd->idx = i * MXSER_PORTS_PER_BOARD;
2496         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2497                 mxser_cards[ent->driver_data].name,
2498                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2499
2500         retval = pci_enable_device(pdev);
2501         if (retval) {
2502                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2503                 goto err;
2504         }
2505
2506         /* io address */
2507         ioaddress = pci_resource_start(pdev, 2);
2508         retval = pci_request_region(pdev, 2, "mxser(IO)");
2509         if (retval)
2510                 goto err;
2511
2512         brd->info = &mxser_cards[ent->driver_data];
2513         for (i = 0; i < brd->info->nports; i++)
2514                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2515
2516         /* vector */
2517         ioaddress = pci_resource_start(pdev, 3);
2518         retval = pci_request_region(pdev, 3, "mxser(vector)");
2519         if (retval)
2520                 goto err_relio;
2521         brd->vector = ioaddress;
2522
2523         /* irq */
2524         brd->irq = pdev->irq;
2525
2526         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2527         brd->uart_type = PORT_16550A;
2528         brd->vector_mask = 0;
2529
2530         for (i = 0; i < brd->info->nports; i++) {
2531                 for (j = 0; j < UART_INFO_NUM; j++) {
2532                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2533                                 brd->ports[i].max_baud =
2534                                         Gpci_uart_info[j].max_baud;
2535
2536                                 /* exception....CP-102 */
2537                                 if (brd->info->flags & MXSER_HIGHBAUD)
2538                                         brd->ports[i].max_baud = 921600;
2539                                 break;
2540                         }
2541                 }
2542         }
2543
2544         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2545                 for (i = 0; i < brd->info->nports; i++) {
2546                         if (i < 4)
2547                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2548                         else
2549                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2550                 }
2551                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2552                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2553         }
2554
2555         for (i = 0; i < brd->info->nports; i++) {
2556                 brd->vector_mask |= (1 << i);
2557                 brd->ports[i].baud_base = 921600;
2558         }
2559
2560         /* mxser_initbrd will hook ISR. */
2561         retval = mxser_initbrd(brd, pdev);
2562         if (retval)
2563                 goto err_null;
2564
2565         for (i = 0; i < brd->info->nports; i++)
2566                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2567
2568         pci_set_drvdata(pdev, brd);
2569
2570         return 0;
2571 err_relio:
2572         pci_release_region(pdev, 2);
2573 err_null:
2574         brd->info = NULL;
2575 err:
2576         return retval;
2577 #else
2578         return -ENODEV;
2579 #endif
2580 }
2581
2582 static void __devexit mxser_remove(struct pci_dev *pdev)
2583 {
2584         struct mxser_board *brd = pci_get_drvdata(pdev);
2585         unsigned int i;
2586
2587         for (i = 0; i < brd->info->nports; i++)
2588                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2589
2590         mxser_release_res(brd, pdev, 1);
2591         brd->info = NULL;
2592 }
2593
2594 static struct pci_driver mxser_driver = {
2595         .name = "mxser",
2596         .id_table = mxser_pcibrds,
2597         .probe = mxser_probe,
2598         .remove = __devexit_p(mxser_remove)
2599 };
2600
2601 static int __init mxser_module_init(void)
2602 {
2603         struct mxser_board *brd;
2604         unsigned long cap;
2605         unsigned int i, m, isaloop;
2606         int retval, b;
2607
2608         pr_debug("Loading module mxser ...\n");
2609
2610         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2611         if (!mxvar_sdriver)
2612                 return -ENOMEM;
2613
2614         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2615                 MXSER_VERSION);
2616
2617         /* Initialize the tty_driver structure */
2618         mxvar_sdriver->owner = THIS_MODULE;
2619         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2620         mxvar_sdriver->name = "ttyMI";
2621         mxvar_sdriver->major = ttymajor;
2622         mxvar_sdriver->minor_start = 0;
2623         mxvar_sdriver->num = MXSER_PORTS + 1;
2624         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2625         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2626         mxvar_sdriver->init_termios = tty_std_termios;
2627         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2628         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2629         tty_set_operations(mxvar_sdriver, &mxser_ops);
2630
2631         retval = tty_register_driver(mxvar_sdriver);
2632         if (retval) {
2633                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2634                                 "tty driver !\n");
2635                 goto err_put;
2636         }
2637
2638         mxvar_diagflag = 0;
2639
2640         m = 0;
2641         /* Start finding ISA boards here */
2642         for (isaloop = 0; isaloop < 2; isaloop++)
2643                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2644                         if (!isaloop)
2645                                 cap = mxserBoardCAP[b]; /* predefined */
2646                         else
2647                                 cap = ioaddr[b]; /* module param */
2648
2649                         if (!cap)
2650                                 continue;
2651
2652                         brd = &mxser_boards[m];
2653                         retval = mxser_get_ISA_conf(cap, brd);
2654
2655                         if (retval != 0)
2656                                 printk(KERN_INFO "Found MOXA %s board "
2657                                         "(CAP=0x%x)\n",
2658                                         brd->info->name, ioaddr[b]);
2659
2660                         if (retval <= 0) {
2661                                 if (retval == MXSER_ERR_IRQ)
2662                                         printk(KERN_ERR "Invalid interrupt "
2663                                                 "number, board not "
2664                                                 "configured\n");
2665                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2666                                         printk(KERN_ERR "Invalid interrupt "
2667                                                 "number, board not "
2668                                                 "configured\n");
2669                                 else if (retval == MXSER_ERR_VECTOR)
2670                                         printk(KERN_ERR "Invalid interrupt "
2671                                                 "vector, board not "
2672                                                 "configured\n");
2673                                 else if (retval == MXSER_ERR_IOADDR)
2674                                         printk(KERN_ERR "Invalid I/O address, "
2675                                                 "board not configured\n");
2676
2677                                 brd->info = NULL;
2678                                 continue;
2679                         }
2680
2681                         /* mxser_initbrd will hook ISR. */
2682                         if (mxser_initbrd(brd, NULL) < 0) {
2683                                 brd->info = NULL;
2684                                 continue;
2685                         }
2686
2687                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2688                         for (i = 0; i < brd->info->nports; i++)
2689                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2690                                                 NULL);
2691
2692                         m++;
2693                 }
2694
2695         retval = pci_register_driver(&mxser_driver);
2696         if (retval) {
2697                 printk(KERN_ERR "Can't register pci driver\n");
2698                 if (!m) {
2699                         retval = -ENODEV;
2700                         goto err_unr;
2701                 } /* else: we have some ISA cards under control */
2702         }
2703
2704         pr_debug("Done.\n");
2705
2706         return 0;
2707 err_unr:
2708         tty_unregister_driver(mxvar_sdriver);
2709 err_put:
2710         put_tty_driver(mxvar_sdriver);
2711         return retval;
2712 }
2713
2714 static void __exit mxser_module_exit(void)
2715 {
2716         unsigned int i, j;
2717
2718         pr_debug("Unloading module mxser ...\n");
2719
2720         pci_unregister_driver(&mxser_driver);
2721
2722         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2723                 if (mxser_boards[i].info != NULL)
2724                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2725                                 tty_unregister_device(mxvar_sdriver,
2726                                                 mxser_boards[i].idx + j);
2727         tty_unregister_driver(mxvar_sdriver);
2728         put_tty_driver(mxvar_sdriver);
2729
2730         for (i = 0; i < MXSER_BOARDS; i++)
2731                 if (mxser_boards[i].info != NULL)
2732                         mxser_release_res(&mxser_boards[i], NULL, 1);
2733
2734         pr_debug("Done.\n");
2735 }
2736
2737 module_init(mxser_module_init);
2738 module_exit(mxser_module_exit);