SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com).
   5  *      Copyright (C) 2006-2008  Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  18  *      - Fixed x86_64 cleanness
  19  *      - Fixed sleep with spinlock held in mxser_send_break
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/errno.h>
  24 #include <linux/signal.h>
  25 #include <linux/sched.h>
  26 #include <linux/timer.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/tty.h>
  29 #include <linux/tty_flip.h>
  30 #include <linux/serial.h>
  31 #include <linux/serial_reg.h>
  32 #include <linux/major.h>
  33 #include <linux/string.h>
  34 #include <linux/fcntl.h>
  35 #include <linux/ptrace.h>
  36 #include <linux/gfp.h>
  37 #include <linux/ioport.h>
  38 #include <linux/mm.h>
  39 #include <linux/delay.h>
  40 #include <linux/pci.h>
  41 #include <linux/bitops.h>
  42
  43 #include <asm/system.h>
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/uaccess.h>
  47
  48 #include "mxser.h"
  49
  50 #define MXSER_VERSION   "2.0.3"         /* 1.11 */
  51 #define MXSERMAJOR       174
  52 #define MXSERCUMAJOR     175
  53
  54 #define MXSER_BOARDS            4       /* Max. boards */
  55 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  56 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  57 #define MXSER_ISR_PASS_LIMIT    100
  58
  59 #define MXSER_ERR_IOADDR        -1
  60 #define MXSER_ERR_IRQ           -2
  61 #define MXSER_ERR_IRQ_CONFLIT   -3
  62 #define MXSER_ERR_VECTOR        -4
  63
  64 /*CheckIsMoxaMust return value*/
  65 #define MOXA_OTHER_UART         0x00
  66 #define MOXA_MUST_MU150_HWID    0x01
  67 #define MOXA_MUST_MU860_HWID    0x02
  68
  69 #define WAKEUP_CHARS            256
  70
  71 #define UART_MCR_AFE            0x20
  72 #define UART_LSR_SPECIAL        0x1E
  73
  74 #define PCI_DEVICE_ID_CB108     0x1080
  75 #define PCI_DEVICE_ID_CB114     0x1142
  76 #define PCI_DEVICE_ID_CP114UL   0x1143
  77 #define PCI_DEVICE_ID_CB134I    0x1341
  78 #define PCI_DEVICE_ID_CP138U    0x1380
  79 #define PCI_DEVICE_ID_POS104UL  0x1044
  80
  81
  82 #define C168_ASIC_ID    1
  83 #define C104_ASIC_ID    2
  84 #define C102_ASIC_ID    0xB
  85 #define CI132_ASIC_ID   4
  86 #define CI134_ASIC_ID   3
  87 #define CI104J_ASIC_ID  5
  88
  89 #define MXSER_HIGHBAUD  1
  90 #define MXSER_HAS2      2
  91
  92 /* This is only for PCI */
  93 static const struct {
  94         int type;
  95         int tx_fifo;
  96         int rx_fifo;
  97         int xmit_fifo_size;
  98         int rx_high_water;
  99         int rx_trigger;
 100         int rx_low_water;
 101         long max_baud;
 102 } Gpci_uart_info[] = {
 103         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 104         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 105         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 106 };
 107 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 108
 109 struct mxser_cardinfo {
 110         char *name;
 111         unsigned int nports;
 112         unsigned int flags;
 113 };
 114
 115 static const struct mxser_cardinfo mxser_cards[] = {
 116 /* 0*/  { "C168 series",        8, },
 117         { "C104 series",        4, },
 118         { "CI-104J series",     4, },
 119         { "C168H/PCI series",   8, },
 120         { "C104H/PCI series",   4, },
 121 /* 5*/  { "C102 series",        4, MXSER_HAS2 },        /* C102-ISA */
 122         { "CI-132 series",      4, MXSER_HAS2 },
 123         { "CI-134 series",      4, },
 124         { "CP-132 series",      2, },
 125         { "CP-114 series",      4, },
 126 /*10*/  { "CT-114 series",      4, },
 127         { "CP-102 series",      2, MXSER_HIGHBAUD },
 128         { "CP-104U series",     4, },
 129         { "CP-168U series",     8, },
 130         { "CP-132U series",     2, },
 131 /*15*/  { "CP-134U series",     4, },
 132         { "CP-104JU series",    4, },
 133         { "Moxa UC7000 Serial", 8, },           /* RC7000 */
 134         { "CP-118U series",     8, },
 135         { "CP-102UL series",    2, },
 136 /*20*/  { "CP-102U series",     2, },
 137         { "CP-118EL series",    8, },
 138         { "CP-168EL series",    8, },
 139         { "CP-104EL series",    4, },
 140         { "CB-108 series",      8, },
 141 /*25*/  { "CB-114 series",      4, },
 142         { "CB-134I series",     4, },
 143         { "CP-138U series",     8, },
 144         { "POS-104UL series",   4, },
 145         { "CP-114UL series",    4, }
 146 };
 147
 148 /* driver_data correspond to the lines in the structure above
 149    see also ISA probe function before you change something */
 150 static struct pci_device_id mxser_pcibrds[] = {
 151         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168),   .driver_data = 3 },
 152         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104),   .driver_data = 4 },
 153         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132),  .driver_data = 8 },
 154         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114),  .driver_data = 9 },
 155         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114),  .driver_data = 10 },
 156         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102),  .driver_data = 11 },
 157         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
 158         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
 159         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
 160         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
 161         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
 162         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
 163         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
 164         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
 165         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
 166         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
 167         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
 168         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
 169         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108),       .driver_data = 24 },
 170         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114),       .driver_data = 25 },
 171         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I),      .driver_data = 26 },
 172         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U),      .driver_data = 27 },
 173         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL),    .driver_data = 28 },
 174         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL),     .driver_data = 29 },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 178
 179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 180 static int ttymajor = MXSERMAJOR;
 181
 182 /* Variables for insmod */
 183
 184 MODULE_AUTHOR("Casper Yang");
 185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 186 module_param_array(ioaddr, int, NULL, 0);
 187 module_param(ttymajor, int, 0);
 188 MODULE_LICENSE("GPL");
 189
 190 struct mxser_log {
 191         int tick;
 192         unsigned long rxcnt[MXSER_PORTS];
 193         unsigned long txcnt[MXSER_PORTS];
 194 };
 195
 196
 197 struct mxser_mon {
 198         unsigned long rxcnt;
 199         unsigned long txcnt;
 200         unsigned long up_rxcnt;
 201         unsigned long up_txcnt;
 202         int modem_status;
 203         unsigned char hold_reason;
 204 };
 205
 206 struct mxser_mon_ext {
 207         unsigned long rx_cnt[32];
 208         unsigned long tx_cnt[32];
 209         unsigned long up_rxcnt[32];
 210         unsigned long up_txcnt[32];
 211         int modem_status[32];
 212
 213         long baudrate[32];
 214         int databits[32];
 215         int stopbits[32];
 216         int parity[32];
 217         int flowctrl[32];
 218         int fifo[32];
 219         int iftype[32];
 220 };
 221
 222 struct mxser_board;
 223
 224 struct mxser_port {
 225         struct mxser_board *board;
 226         struct tty_struct *tty;
 227
 228         unsigned long ioaddr;
 229         unsigned long opmode_ioaddr;
 230         int max_baud;
 231
 232         int rx_high_water;
 233         int rx_trigger;         /* Rx fifo trigger level */
 234         int rx_low_water;
 235         int baud_base;          /* max. speed */
 236         int type;               /* UART type */
 237         int flags;              /* defined in tty.h */
 238
 239         int x_char;             /* xon/xoff character */
 240         int IER;                /* Interrupt Enable Register */
 241         int MCR;                /* Modem control register */
 242
 243         unsigned char stop_rx;
 244         unsigned char ldisc_stop_rx;
 245
 246         int custom_divisor;
 247         int close_delay;
 248         unsigned short closing_wait;
 249         unsigned char err_shadow;
 250         unsigned long event;
 251
 252         int count;              /* # of fd on device */
 253         int blocked_open;       /* # of blocked opens */
 254         struct async_icount icount; /* kernel counters for 4 input interrupts */
 255         int timeout;
 256
 257         int read_status_mask;
 258         int ignore_status_mask;
 259         int xmit_fifo_size;
 260         unsigned char *xmit_buf;
 261         int xmit_head;
 262         int xmit_tail;
 263         int xmit_cnt;
 264
 265         struct ktermios normal_termios;
 266
 267         struct mxser_mon mon_data;
 268
 269         spinlock_t slock;
 270         wait_queue_head_t open_wait;
 271         wait_queue_head_t delta_msr_wait;
 272 };
 273
 274 struct mxser_board {
 275         unsigned int idx;
 276         int irq;
 277         const struct mxser_cardinfo *info;
 278         unsigned long vector;
 279         unsigned long vector_mask;
 280
 281         int chip_flag;
 282         int uart_type;
 283
 284         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 285 };
 286
 287 struct mxser_mstatus {
 288         tcflag_t cflag;
 289         int cts;
 290         int dsr;
 291         int ri;
 292         int dcd;
 293 };
 294
 295 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 296
 297 static int mxserBoardCAP[MXSER_BOARDS] = {
 298         0, 0, 0, 0
 299         /*  0x180, 0x280, 0x200, 0x320 */
 300 };
 301
 302 static struct mxser_board mxser_boards[MXSER_BOARDS];
 303 static struct tty_driver *mxvar_sdriver;
 304 static struct mxser_log mxvar_log;
 305 static int mxvar_diagflag;
 306 static unsigned char mxser_msr[MXSER_PORTS + 1];
 307 static struct mxser_mon_ext mon_data_ext;
 308 static int mxser_set_baud_method[MXSER_PORTS + 1];
 309
 310 #ifdef CONFIG_PCI
 311 static int __devinit CheckIsMoxaMust(unsigned long io)
 312 {
 313         u8 oldmcr, hwid;
 314         int i;
 315
 316         outb(0, io + UART_LCR);
 317         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 318         oldmcr = inb(io + UART_MCR);
 319         outb(0, io + UART_MCR);
 320         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 321         if ((hwid = inb(io + UART_MCR)) != 0) {
 322                 outb(oldmcr, io + UART_MCR);
 323                 return MOXA_OTHER_UART;
 324         }
 325
 326         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 327         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 328                 if (hwid == Gpci_uart_info[i].type)
 329                         return (int)hwid;
 330         }
 331         return MOXA_OTHER_UART;
 332 }
 333 #endif
 334
 335 static void process_txrx_fifo(struct mxser_port *info)
 336 {
 337         int i;
 338
 339         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 340                 info->rx_trigger = 1;
 341                 info->rx_high_water = 1;
 342                 info->rx_low_water = 1;
 343                 info->xmit_fifo_size = 1;
 344         } else
 345                 for (i = 0; i < UART_INFO_NUM; i++)
 346                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 347                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 348                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 349                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 350                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 351                                 break;
 352                         }
 353 }
 354
 355 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 356 {
 357         unsigned char status = 0;
 358
 359         status = inb(baseaddr + UART_MSR);
 360
 361         mxser_msr[port] &= 0x0F;
 362         mxser_msr[port] |= status;
 363         status = mxser_msr[port];
 364         if (mode)
 365                 mxser_msr[port] = 0;
 366
 367         return status;
 368 }
 369
 370 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 371                 struct mxser_port *port)
 372 {
 373         DECLARE_WAITQUEUE(wait, current);
 374         int retval;
 375         int do_clocal = 0;
 376         unsigned long flags;
 377
 378         /*
 379          * If non-blocking mode is set, or the port is not enabled,
 380          * then make the check up front and then exit.
 381          */
 382         if ((filp->f_flags & O_NONBLOCK) ||
 383                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 384                 port->flags |= ASYNC_NORMAL_ACTIVE;
 385                 return 0;
 386         }
 387
 388         if (tty->termios->c_cflag & CLOCAL)
 389                 do_clocal = 1;
 390
 391         /*
 392          * Block waiting for the carrier detect and the line to become
 393          * free (i.e., not in use by the callout).  While we are in
 394          * this loop, port->count is dropped by one, so that
 395          * mxser_close() knows when to free things.  We restore it upon
 396          * exit, either normal or abnormal.
 397          */
 398         retval = 0;
 399         add_wait_queue(&port->open_wait, &wait);
 400
 401         spin_lock_irqsave(&port->slock, flags);
 402         if (!tty_hung_up_p(filp))
 403                 port->count--;
 404         spin_unlock_irqrestore(&port->slock, flags);
 405         port->blocked_open++;
 406         while (1) {
 407                 spin_lock_irqsave(&port->slock, flags);
 408                 outb(inb(port->ioaddr + UART_MCR) |
 409                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 410                 spin_unlock_irqrestore(&port->slock, flags);
 411                 set_current_state(TASK_INTERRUPTIBLE);
 412                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 413                         if (port->flags & ASYNC_HUP_NOTIFY)
 414                                 retval = -EAGAIN;
 415                         else
 416                                 retval = -ERESTARTSYS;
 417                         break;
 418                 }
 419                 if (!(port->flags & ASYNC_CLOSING) &&
 420                                 (do_clocal ||
 421                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 422                         break;
 423                 if (signal_pending(current)) {
 424                         retval = -ERESTARTSYS;
 425                         break;
 426                 }
 427                 schedule();
 428         }
 429         set_current_state(TASK_RUNNING);
 430         remove_wait_queue(&port->open_wait, &wait);
 431         if (!tty_hung_up_p(filp))
 432                 port->count++;
 433         port->blocked_open--;
 434         if (retval)
 435                 return retval;
 436         port->flags |= ASYNC_NORMAL_ACTIVE;
 437         return 0;
 438 }
 439
 440 static int mxser_set_baud(struct mxser_port *info, long newspd)
 441 {
 442         int quot = 0, baud;
 443         unsigned char cval;
 444
 445         if (!info->tty || !info->tty->termios)
 446                 return -1;
 447
 448         if (!(info->ioaddr))
 449                 return -1;
 450
 451         if (newspd > info->max_baud)
 452                 return -1;
 453
 454         if (newspd == 134) {
 455                 quot = 2 * info->baud_base / 269;
 456                 tty_encode_baud_rate(info->tty, 134, 134);
 457         } else if (newspd) {
 458                 quot = info->baud_base / newspd;
 459                 if (quot == 0)
 460                         quot = 1;
 461                 baud = info->baud_base/quot;
 462                 tty_encode_baud_rate(info->tty, baud, baud);
 463         } else {
 464                 quot = 0;
 465         }
 466
 467         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 468         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 469
 470         if (quot) {
 471                 info->MCR |= UART_MCR_DTR;
 472                 outb(info->MCR, info->ioaddr + UART_MCR);
 473         } else {
 474                 info->MCR &= ~UART_MCR_DTR;
 475                 outb(info->MCR, info->ioaddr + UART_MCR);
 476                 return 0;
 477         }
 478
 479         cval = inb(info->ioaddr + UART_LCR);
 480
 481         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 482
 483         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 484         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 485         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 486
 487 #ifdef BOTHER
 488         if (C_BAUD(info->tty) == BOTHER) {
 489                 quot = info->baud_base % newspd;
 490                 quot *= 8;
 491                 if (quot % newspd > newspd / 2) {
 492                         quot /= newspd;
 493                         quot++;
 494                 } else
 495                         quot /= newspd;
 496
 497                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 498         } else
 499 #endif
 500                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 501
 502         return 0;
 503 }
 504
 505 /*
 506  * This routine is called to set the UART divisor registers to match
 507  * the specified baud rate for a serial port.
 508  */
 509 static int mxser_change_speed(struct mxser_port *info,
 510                 struct ktermios *old_termios)
 511 {
 512         unsigned cflag, cval, fcr;
 513         int ret = 0;
 514         unsigned char status;
 515
 516         if (!info->tty || !info->tty->termios)
 517                 return ret;
 518         cflag = info->tty->termios->c_cflag;
 519         if (!(info->ioaddr))
 520                 return ret;
 521
 522         if (mxser_set_baud_method[info->tty->index] == 0)
 523                 mxser_set_baud(info, tty_get_baud_rate(info->tty));
 524
 525         /* byte size and parity */
 526         switch (cflag & CSIZE) {
 527         case CS5:
 528                 cval = 0x00;
 529                 break;
 530         case CS6:
 531                 cval = 0x01;
 532                 break;
 533         case CS7:
 534                 cval = 0x02;
 535                 break;
 536         case CS8:
 537                 cval = 0x03;
 538                 break;
 539         default:
 540                 cval = 0x00;
 541                 break;          /* too keep GCC shut... */
 542         }
 543         if (cflag & CSTOPB)
 544                 cval |= 0x04;
 545         if (cflag & PARENB)
 546                 cval |= UART_LCR_PARITY;
 547         if (!(cflag & PARODD))
 548                 cval |= UART_LCR_EPAR;
 549         if (cflag & CMSPAR)
 550                 cval |= UART_LCR_SPAR;
 551
 552         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 553                 if (info->board->chip_flag) {
 554                         fcr = UART_FCR_ENABLE_FIFO;
 555                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 556                         SET_MOXA_MUST_FIFO_VALUE(info);
 557                 } else
 558                         fcr = 0;
 559         } else {
 560                 fcr = UART_FCR_ENABLE_FIFO;
 561                 if (info->board->chip_flag) {
 562                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 563                         SET_MOXA_MUST_FIFO_VALUE(info);
 564                 } else {
 565                         switch (info->rx_trigger) {
 566                         case 1:
 567                                 fcr |= UART_FCR_TRIGGER_1;
 568                                 break;
 569                         case 4:
 570                                 fcr |= UART_FCR_TRIGGER_4;
 571                                 break;
 572                         case 8:
 573                                 fcr |= UART_FCR_TRIGGER_8;
 574                                 break;
 575                         default:
 576                                 fcr |= UART_FCR_TRIGGER_14;
 577                                 break;
 578                         }
 579                 }
 580         }
 581
 582         /* CTS flow control flag and modem status interrupts */
 583         info->IER &= ~UART_IER_MSI;
 584         info->MCR &= ~UART_MCR_AFE;
 585         if (cflag & CRTSCTS) {
 586                 info->flags |= ASYNC_CTS_FLOW;
 587                 info->IER |= UART_IER_MSI;
 588                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 589                         info->MCR |= UART_MCR_AFE;
 590                 } else {
 591                         status = inb(info->ioaddr + UART_MSR);
 592                         if (info->tty->hw_stopped) {
 593                                 if (status & UART_MSR_CTS) {
 594                                         info->tty->hw_stopped = 0;
 595                                         if (info->type != PORT_16550A &&
 596                                                         !info->board->chip_flag) {
 597                                                 outb(info->IER & ~UART_IER_THRI,
 598                                                         info->ioaddr +
 599                                                         UART_IER);
 600                                                 info->IER |= UART_IER_THRI;
 601                                                 outb(info->IER, info->ioaddr +
 602                                                                 UART_IER);
 603                                         }
 604                                         tty_wakeup(info->tty);
 605                                 }
 606                         } else {
 607                                 if (!(status & UART_MSR_CTS)) {
 608                                         info->tty->hw_stopped = 1;
 609                                         if ((info->type != PORT_16550A) &&
 610                                                         (!info->board->chip_flag)) {
 611                                                 info->IER &= ~UART_IER_THRI;
 612                                                 outb(info->IER, info->ioaddr +
 613                                                                 UART_IER);
 614                                         }
 615                                 }
 616                         }
 617                 }
 618         } else {
 619                 info->flags &= ~ASYNC_CTS_FLOW;
 620         }
 621         outb(info->MCR, info->ioaddr + UART_MCR);
 622         if (cflag & CLOCAL) {
 623                 info->flags &= ~ASYNC_CHECK_CD;
 624         } else {
 625                 info->flags |= ASYNC_CHECK_CD;
 626                 info->IER |= UART_IER_MSI;
 627         }
 628         outb(info->IER, info->ioaddr + UART_IER);
 629
 630         /*
 631          * Set up parity check flag
 632          */
 633         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 634         if (I_INPCK(info->tty))
 635                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 636         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 637                 info->read_status_mask |= UART_LSR_BI;
 638
 639         info->ignore_status_mask = 0;
 640
 641         if (I_IGNBRK(info->tty)) {
 642                 info->ignore_status_mask |= UART_LSR_BI;
 643                 info->read_status_mask |= UART_LSR_BI;
 644                 /*
 645                  * If we're ignore parity and break indicators, ignore
 646                  * overruns too.  (For real raw support).
 647                  */
 648                 if (I_IGNPAR(info->tty)) {
 649                         info->ignore_status_mask |=
 650                                                 UART_LSR_OE |
 651                                                 UART_LSR_PE |
 652                                                 UART_LSR_FE;
 653                         info->read_status_mask |=
 654                                                 UART_LSR_OE |
 655                                                 UART_LSR_PE |
 656                                                 UART_LSR_FE;
 657                 }
 658         }
 659         if (info->board->chip_flag) {
 660                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 661                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 662                 if (I_IXON(info->tty)) {
 663                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 664                 } else {
 665                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 666                 }
 667                 if (I_IXOFF(info->tty)) {
 668                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 669                 } else {
 670                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 671                 }
 672         }
 673
 674
 675         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 676         outb(cval, info->ioaddr + UART_LCR);
 677
 678         return ret;
 679 }
 680
 681 static void mxser_check_modem_status(struct mxser_port *port, int status)
 682 {
 683         /* update input line counters */
 684         if (status & UART_MSR_TERI)
 685                 port->icount.rng++;
 686         if (status & UART_MSR_DDSR)
 687                 port->icount.dsr++;
 688         if (status & UART_MSR_DDCD)
 689                 port->icount.dcd++;
 690         if (status & UART_MSR_DCTS)
 691                 port->icount.cts++;
 692         port->mon_data.modem_status = status;
 693         wake_up_interruptible(&port->delta_msr_wait);
 694
 695         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 696                 if (status & UART_MSR_DCD)
 697                         wake_up_interruptible(&port->open_wait);
 698         }
 699
 700         if (port->flags & ASYNC_CTS_FLOW) {
 701                 if (port->tty->hw_stopped) {
 702                         if (status & UART_MSR_CTS) {
 703                                 port->tty->hw_stopped = 0;
 704
 705                                 if ((port->type != PORT_16550A) &&
 706                                                 (!port->board->chip_flag)) {
 707                                         outb(port->IER & ~UART_IER_THRI,
 708                                                 port->ioaddr + UART_IER);
 709                                         port->IER |= UART_IER_THRI;
 710                                         outb(port->IER, port->ioaddr +
 711                                                         UART_IER);
 712                                 }
 713                                 tty_wakeup(port->tty);
 714                         }
 715                 } else {
 716                         if (!(status & UART_MSR_CTS)) {
 717                                 port->tty->hw_stopped = 1;
 718                                 if (port->type != PORT_16550A &&
 719                                                 !port->board->chip_flag) {
 720                                         port->IER &= ~UART_IER_THRI;
 721                                         outb(port->IER, port->ioaddr +
 722                                                         UART_IER);
 723                                 }
 724                         }
 725                 }
 726         }
 727 }
 728
 729 static int mxser_startup(struct mxser_port *info)
 730 {
 731         unsigned long page;
 732         unsigned long flags;
 733
 734         page = __get_free_page(GFP_KERNEL);
 735         if (!page)
 736                 return -ENOMEM;
 737
 738         spin_lock_irqsave(&info->slock, flags);
 739
 740         if (info->flags & ASYNC_INITIALIZED) {
 741                 free_page(page);
 742                 spin_unlock_irqrestore(&info->slock, flags);
 743                 return 0;
 744         }
 745
 746         if (!info->ioaddr || !info->type) {
 747                 if (info->tty)
 748                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 749                 free_page(page);
 750                 spin_unlock_irqrestore(&info->slock, flags);
 751                 return 0;
 752         }
 753         if (info->xmit_buf)
 754                 free_page(page);
 755         else
 756                 info->xmit_buf = (unsigned char *) page;
 757
 758         /*
 759          * Clear the FIFO buffers and disable them
 760          * (they will be reenabled in mxser_change_speed())
 761          */
 762         if (info->board->chip_flag)
 763                 outb((UART_FCR_CLEAR_RCVR |
 764                         UART_FCR_CLEAR_XMIT |
 765                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 766         else
 767                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 768                         info->ioaddr + UART_FCR);
 769
 770         /*
 771          * At this point there's no way the LSR could still be 0xFF;
 772          * if it is, then bail out, because there's likely no UART
 773          * here.
 774          */
 775         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 776                 spin_unlock_irqrestore(&info->slock, flags);
 777                 if (capable(CAP_SYS_ADMIN)) {
 778                         if (info->tty)
 779                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 780                         return 0;
 781                 } else
 782                         return -ENODEV;
 783         }
 784
 785         /*
 786          * Clear the interrupt registers.
 787          */
 788         (void) inb(info->ioaddr + UART_LSR);
 789         (void) inb(info->ioaddr + UART_RX);
 790         (void) inb(info->ioaddr + UART_IIR);
 791         (void) inb(info->ioaddr + UART_MSR);
 792
 793         /*
 794          * Now, initialize the UART
 795          */
 796         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 797         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 798         outb(info->MCR, info->ioaddr + UART_MCR);
 799
 800         /*
 801          * Finally, enable interrupts
 802          */
 803         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 804
 805         if (info->board->chip_flag)
 806                 info->IER |= MOXA_MUST_IER_EGDAI;
 807         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 808
 809         /*
 810          * And clear the interrupt registers again for luck.
 811          */
 812         (void) inb(info->ioaddr + UART_LSR);
 813         (void) inb(info->ioaddr + UART_RX);
 814         (void) inb(info->ioaddr + UART_IIR);
 815         (void) inb(info->ioaddr + UART_MSR);
 816
 817         if (info->tty)
 818                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 819         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 820
 821         /*
 822          * and set the speed of the serial port
 823          */
 824         mxser_change_speed(info, NULL);
 825         info->flags |= ASYNC_INITIALIZED;
 826         spin_unlock_irqrestore(&info->slock, flags);
 827
 828         return 0;
 829 }
 830
 831 /*
 832  * This routine will shutdown a serial port; interrupts maybe disabled, and
 833  * DTR is dropped if the hangup on close termio flag is on.
 834  */
 835 static void mxser_shutdown(struct mxser_port *info)
 836 {
 837         unsigned long flags;
 838
 839         if (!(info->flags & ASYNC_INITIALIZED))
 840                 return;
 841
 842         spin_lock_irqsave(&info->slock, flags);
 843
 844         /*
 845          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 846          * here so the queue might never be waken up
 847          */
 848         wake_up_interruptible(&info->delta_msr_wait);
 849
 850         /*
 851          * Free the IRQ, if necessary
 852          */
 853         if (info->xmit_buf) {
 854                 free_page((unsigned long) info->xmit_buf);
 855                 info->xmit_buf = NULL;
 856         }
 857
 858         info->IER = 0;
 859         outb(0x00, info->ioaddr + UART_IER);
 860
 861         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 862                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 863         outb(info->MCR, info->ioaddr + UART_MCR);
 864
 865         /* clear Rx/Tx FIFO's */
 866         if (info->board->chip_flag)
 867                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 868                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 869                                 info->ioaddr + UART_FCR);
 870         else
 871                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 872                         info->ioaddr + UART_FCR);
 873
 874         /* read data port to reset things */
 875         (void) inb(info->ioaddr + UART_RX);
 876
 877         if (info->tty)
 878                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 879
 880         info->flags &= ~ASYNC_INITIALIZED;
 881
 882         if (info->board->chip_flag)
 883                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 884
 885         spin_unlock_irqrestore(&info->slock, flags);
 886 }
 887
 888 /*
 889  * This routine is called whenever a serial port is opened.  It
 890  * enables interrupts for a serial port, linking in its async structure into
 891  * the IRQ chain.   It also performs the serial-specific
 892  * initialization for the tty structure.
 893  */
 894 static int mxser_open(struct tty_struct *tty, struct file *filp)
 895 {
 896         struct mxser_port *info;
 897         unsigned long flags;
 898         int retval, line;
 899
 900         line = tty->index;
 901         if (line == MXSER_PORTS)
 902                 return 0;
 903         if (line < 0 || line > MXSER_PORTS)
 904                 return -ENODEV;
 905         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 906         if (!info->ioaddr)
 907                 return -ENODEV;
 908
 909         tty->driver_data = info;
 910         info->tty = tty;
 911         /*
 912          * Start up serial port
 913          */
 914         spin_lock_irqsave(&info->slock, flags);
 915         info->count++;
 916         spin_unlock_irqrestore(&info->slock, flags);
 917         retval = mxser_startup(info);
 918         if (retval)
 919                 return retval;
 920
 921         retval = mxser_block_til_ready(tty, filp, info);
 922         if (retval)
 923                 return retval;
 924
 925         /* unmark here for very high baud rate (ex. 921600 bps) used */
 926         tty->low_latency = 1;
 927         return 0;
 928 }
 929
 930 static void mxser_flush_buffer(struct tty_struct *tty)
 931 {
 932         struct mxser_port *info = tty->driver_data;
 933         char fcr;
 934         unsigned long flags;
 935
 936
 937         spin_lock_irqsave(&info->slock, flags);
 938         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 939
 940         fcr = inb(info->ioaddr + UART_FCR);
 941         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 942                 info->ioaddr + UART_FCR);
 943         outb(fcr, info->ioaddr + UART_FCR);
 944
 945         spin_unlock_irqrestore(&info->slock, flags);
 946
 947         tty_wakeup(tty);
 948 }
 949
 950
 951 /*
 952  * This routine is called when the serial port gets closed.  First, we
 953  * wait for the last remaining data to be sent.  Then, we unlink its
 954  * async structure from the interrupt chain if necessary, and we free
 955  * that IRQ if nothing is left in the chain.
 956  */
 957 static void mxser_close(struct tty_struct *tty, struct file *filp)
 958 {
 959         struct mxser_port *info = tty->driver_data;
 960
 961         unsigned long timeout;
 962         unsigned long flags;
 963
 964         if (tty->index == MXSER_PORTS)
 965                 return;
 966         if (!info)
 967                 return;
 968
 969         spin_lock_irqsave(&info->slock, flags);
 970
 971         if (tty_hung_up_p(filp)) {
 972                 spin_unlock_irqrestore(&info->slock, flags);
 973                 return;
 974         }
 975         if ((tty->count == 1) && (info->count != 1)) {
 976                 /*
 977                  * Uh, oh.  tty->count is 1, which means that the tty
 978                  * structure will be freed.  Info->count should always
 979                  * be one in these conditions.  If it's greater than
 980                  * one, we've got real problems, since it means the
 981                  * serial port won't be shutdown.
 982                  */
 983                 printk(KERN_ERR "mxser_close: bad serial port count; "
 984                         "tty->count is 1, info->count is %d\n", info->count);
 985                 info->count = 1;
 986         }
 987         if (--info->count < 0) {
 988                 printk(KERN_ERR "mxser_close: bad serial port count for "
 989                         "ttys%d: %d\n", tty->index, info->count);
 990                 info->count = 0;
 991         }
 992         if (info->count) {
 993                 spin_unlock_irqrestore(&info->slock, flags);
 994                 return;
 995         }
 996         info->flags |= ASYNC_CLOSING;
 997         spin_unlock_irqrestore(&info->slock, flags);
 998         /*
 999          * Save the termios structure, since this port may have
1000          * separate termios for callout and dialin.
1001          */
1002         if (info->flags & ASYNC_NORMAL_ACTIVE)
1003                 info->normal_termios = *tty->termios;
1004         /*
1005          * Now we wait for the transmit buffer to clear; and we notify
1006          * the line discipline to only process XON/XOFF characters.
1007          */
1008         tty->closing = 1;
1009         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1010                 tty_wait_until_sent(tty, info->closing_wait);
1011         /*
1012          * At this point we stop accepting input.  To do this, we
1013          * disable the receive line status interrupts, and tell the
1014          * interrupt driver to stop checking the data ready bit in the
1015          * line status register.
1016          */
1017         info->IER &= ~UART_IER_RLSI;
1018         if (info->board->chip_flag)
1019                 info->IER &= ~MOXA_MUST_RECV_ISR;
1020
1021         if (info->flags & ASYNC_INITIALIZED) {
1022                 outb(info->IER, info->ioaddr + UART_IER);
1023                 /*
1024                  * Before we drop DTR, make sure the UART transmitter
1025                  * has completely drained; this is especially
1026                  * important if there is a transmit FIFO!
1027                  */
1028                 timeout = jiffies + HZ;
1029                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1030                         schedule_timeout_interruptible(5);
1031                         if (time_after(jiffies, timeout))
1032                                 break;
1033                 }
1034         }
1035         mxser_shutdown(info);
1036
1037         mxser_flush_buffer(tty);
1038         tty_ldisc_flush(tty);
1039
1040         tty->closing = 0;
1041         info->event = 0;
1042         info->tty = NULL;
1043         if (info->blocked_open) {
1044                 if (info->close_delay)
1045                         schedule_timeout_interruptible(info->close_delay);
1046                 wake_up_interruptible(&info->open_wait);
1047         }
1048
1049         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1050 }
1051
1052 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1053 {
1054         int c, total = 0;
1055         struct mxser_port *info = tty->driver_data;
1056         unsigned long flags;
1057
1058         if (!info->xmit_buf)
1059                 return 0;
1060
1061         while (1) {
1062                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1063                                           SERIAL_XMIT_SIZE - info->xmit_head));
1064                 if (c <= 0)
1065                         break;
1066
1067                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1068                 spin_lock_irqsave(&info->slock, flags);
1069                 info->xmit_head = (info->xmit_head + c) &
1070                                   (SERIAL_XMIT_SIZE - 1);
1071                 info->xmit_cnt += c;
1072                 spin_unlock_irqrestore(&info->slock, flags);
1073
1074                 buf += c;
1075                 count -= c;
1076                 total += c;
1077         }
1078
1079         if (info->xmit_cnt && !tty->stopped) {
1080                 if (!tty->hw_stopped ||
1081                                 (info->type == PORT_16550A) ||
1082                                 (info->board->chip_flag)) {
1083                         spin_lock_irqsave(&info->slock, flags);
1084                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1085                                         UART_IER);
1086                         info->IER |= UART_IER_THRI;
1087                         outb(info->IER, info->ioaddr + UART_IER);
1088                         spin_unlock_irqrestore(&info->slock, flags);
1089                 }
1090         }
1091         return total;
1092 }
1093
1094 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1095 {
1096         struct mxser_port *info = tty->driver_data;
1097         unsigned long flags;
1098
1099         if (!info->xmit_buf)
1100                 return;
1101
1102         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1103                 return;
1104
1105         spin_lock_irqsave(&info->slock, flags);
1106         info->xmit_buf[info->xmit_head++] = ch;
1107         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1108         info->xmit_cnt++;
1109         spin_unlock_irqrestore(&info->slock, flags);
1110         if (!tty->stopped) {
1111                 if (!tty->hw_stopped ||
1112                                 (info->type == PORT_16550A) ||
1113                                 info->board->chip_flag) {
1114                         spin_lock_irqsave(&info->slock, flags);
1115                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1116                         info->IER |= UART_IER_THRI;
1117                         outb(info->IER, info->ioaddr + UART_IER);
1118                         spin_unlock_irqrestore(&info->slock, flags);
1119                 }
1120         }
1121 }
1122
1123
1124 static void mxser_flush_chars(struct tty_struct *tty)
1125 {
1126         struct mxser_port *info = tty->driver_data;
1127         unsigned long flags;
1128
1129         if (info->xmit_cnt <= 0 ||
1130                         tty->stopped ||
1131                         !info->xmit_buf ||
1132                         (tty->hw_stopped &&
1133                          (info->type != PORT_16550A) &&
1134                          (!info->board->chip_flag)
1135                         ))
1136                 return;
1137
1138         spin_lock_irqsave(&info->slock, flags);
1139
1140         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1141         info->IER |= UART_IER_THRI;
1142         outb(info->IER, info->ioaddr + UART_IER);
1143
1144         spin_unlock_irqrestore(&info->slock, flags);
1145 }
1146
1147 static int mxser_write_room(struct tty_struct *tty)
1148 {
1149         struct mxser_port *info = tty->driver_data;
1150         int ret;
1151
1152         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1153         if (ret < 0)
1154                 ret = 0;
1155         return ret;
1156 }
1157
1158 static int mxser_chars_in_buffer(struct tty_struct *tty)
1159 {
1160         struct mxser_port *info = tty->driver_data;
1161         return info->xmit_cnt;
1162 }
1163
1164 /*
1165  * ------------------------------------------------------------
1166  * friends of mxser_ioctl()
1167  * ------------------------------------------------------------
1168  */
1169 static int mxser_get_serial_info(struct mxser_port *info,
1170                 struct serial_struct __user *retinfo)
1171 {
1172         struct serial_struct tmp = {
1173                 .type = info->type,
1174                 .line = info->tty->index,
1175                 .port = info->ioaddr,
1176                 .irq = info->board->irq,
1177                 .flags = info->flags,
1178                 .baud_base = info->baud_base,
1179                 .close_delay = info->close_delay,
1180                 .closing_wait = info->closing_wait,
1181                 .custom_divisor = info->custom_divisor,
1182                 .hub6 = 0
1183         };
1184         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1185                 return -EFAULT;
1186         return 0;
1187 }
1188
1189 static int mxser_set_serial_info(struct mxser_port *info,
1190                 struct serial_struct __user *new_info)
1191 {
1192         struct serial_struct new_serial;
1193         speed_t baud;
1194         unsigned long sl_flags;
1195         unsigned int flags;
1196         int retval = 0;
1197
1198         if (!new_info || !info->ioaddr)
1199                 return -ENODEV;
1200         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1201                 return -EFAULT;
1202
1203         if (new_serial.irq != info->board->irq ||
1204                         new_serial.port != info->ioaddr)
1205                 return -EINVAL;
1206
1207         flags = info->flags & ASYNC_SPD_MASK;
1208
1209         if (!capable(CAP_SYS_ADMIN)) {
1210                 if ((new_serial.baud_base != info->baud_base) ||
1211                                 (new_serial.close_delay != info->close_delay) ||
1212                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1213                         return -EPERM;
1214                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1215                                 (new_serial.flags & ASYNC_USR_MASK));
1216         } else {
1217                 /*
1218                  * OK, past this point, all the error checking has been done.
1219                  * At this point, we start making changes.....
1220                  */
1221                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1222                                 (new_serial.flags & ASYNC_FLAGS));
1223                 info->close_delay = new_serial.close_delay * HZ / 100;
1224                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1225                 info->tty->low_latency =
1226                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1227                 info->tty->low_latency = 0;
1228                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1229                                 (new_serial.baud_base != info->baud_base ||
1230                                 new_serial.custom_divisor !=
1231                                 info->custom_divisor)) {
1232                         baud = new_serial.baud_base / new_serial.custom_divisor;
1233                         tty_encode_baud_rate(info->tty, baud, baud);
1234                 }
1235         }
1236
1237         info->type = new_serial.type;
1238
1239         process_txrx_fifo(info);
1240
1241         if (info->flags & ASYNC_INITIALIZED) {
1242                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1243                         spin_lock_irqsave(&info->slock, sl_flags);
1244                         mxser_change_speed(info, NULL);
1245                         spin_unlock_irqrestore(&info->slock, sl_flags);
1246                 }
1247         } else
1248                 retval = mxser_startup(info);
1249
1250         return retval;
1251 }
1252
1253 /*
1254  * mxser_get_lsr_info - get line status register info
1255  *
1256  * Purpose: Let user call ioctl() to get info when the UART physically
1257  *          is emptied.  On bus types like RS485, the transmitter must
1258  *          release the bus after transmitting. This must be done when
1259  *          the transmit shift register is empty, not be done when the
1260  *          transmit holding register is empty.  This functionality
1261  *          allows an RS485 driver to be written in user space.
1262  */
1263 static int mxser_get_lsr_info(struct mxser_port *info,
1264                 unsigned int __user *value)
1265 {
1266         unsigned char status;
1267         unsigned int result;
1268         unsigned long flags;
1269
1270         spin_lock_irqsave(&info->slock, flags);
1271         status = inb(info->ioaddr + UART_LSR);
1272         spin_unlock_irqrestore(&info->slock, flags);
1273         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1274         return put_user(result, value);
1275 }
1276
1277 /*
1278  * This routine sends a break character out the serial port.
1279  */
1280 static void mxser_send_break(struct mxser_port *info, int duration)
1281 {
1282         unsigned long flags;
1283
1284         if (!info->ioaddr)
1285                 return;
1286         set_current_state(TASK_INTERRUPTIBLE);
1287         spin_lock_irqsave(&info->slock, flags);
1288         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1289                 info->ioaddr + UART_LCR);
1290         spin_unlock_irqrestore(&info->slock, flags);
1291         schedule_timeout(duration);
1292         spin_lock_irqsave(&info->slock, flags);
1293         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1294                 info->ioaddr + UART_LCR);
1295         spin_unlock_irqrestore(&info->slock, flags);
1296 }
1297
1298 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1299 {
1300         struct mxser_port *info = tty->driver_data;
1301         unsigned char control, status;
1302         unsigned long flags;
1303
1304
1305         if (tty->index == MXSER_PORTS)
1306                 return -ENOIOCTLCMD;
1307         if (test_bit(TTY_IO_ERROR, &tty->flags))
1308                 return -EIO;
1309
1310         control = info->MCR;
1311
1312         spin_lock_irqsave(&info->slock, flags);
1313         status = inb(info->ioaddr + UART_MSR);
1314         if (status & UART_MSR_ANY_DELTA)
1315                 mxser_check_modem_status(info, status);
1316         spin_unlock_irqrestore(&info->slock, flags);
1317         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1318                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1319                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1320                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1321                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1322                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1323 }
1324
1325 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1326                 unsigned int set, unsigned int clear)
1327 {
1328         struct mxser_port *info = tty->driver_data;
1329         unsigned long flags;
1330
1331
1332         if (tty->index == MXSER_PORTS)
1333                 return -ENOIOCTLCMD;
1334         if (test_bit(TTY_IO_ERROR, &tty->flags))
1335                 return -EIO;
1336
1337         spin_lock_irqsave(&info->slock, flags);
1338
1339         if (set & TIOCM_RTS)
1340                 info->MCR |= UART_MCR_RTS;
1341         if (set & TIOCM_DTR)
1342                 info->MCR |= UART_MCR_DTR;
1343
1344         if (clear & TIOCM_RTS)
1345                 info->MCR &= ~UART_MCR_RTS;
1346         if (clear & TIOCM_DTR)
1347                 info->MCR &= ~UART_MCR_DTR;
1348
1349         outb(info->MCR, info->ioaddr + UART_MCR);
1350         spin_unlock_irqrestore(&info->slock, flags);
1351         return 0;
1352 }
1353
1354 static int __init mxser_program_mode(int port)
1355 {
1356         int id, i, j, n;
1357
1358         outb(0, port);
1359         outb(0, port);
1360         outb(0, port);
1361         (void)inb(port);
1362         (void)inb(port);
1363         outb(0, port);
1364         (void)inb(port);
1365
1366         id = inb(port + 1) & 0x1F;
1367         if ((id != C168_ASIC_ID) &&
1368                         (id != C104_ASIC_ID) &&
1369                         (id != C102_ASIC_ID) &&
1370                         (id != CI132_ASIC_ID) &&
1371                         (id != CI134_ASIC_ID) &&
1372                         (id != CI104J_ASIC_ID))
1373                 return -1;
1374         for (i = 0, j = 0; i < 4; i++) {
1375                 n = inb(port + 2);
1376                 if (n == 'M') {
1377                         j = 1;
1378                 } else if ((j == 1) && (n == 1)) {
1379                         j = 2;
1380                         break;
1381                 } else
1382                         j = 0;
1383         }
1384         if (j != 2)
1385                 id = -2;
1386         return id;
1387 }
1388
1389 static void __init mxser_normal_mode(int port)
1390 {
1391         int i, n;
1392
1393         outb(0xA5, port + 1);
1394         outb(0x80, port + 3);
1395         outb(12, port + 0);     /* 9600 bps */
1396         outb(0, port + 1);
1397         outb(0x03, port + 3);   /* 8 data bits */
1398         outb(0x13, port + 4);   /* loop back mode */
1399         for (i = 0; i < 16; i++) {
1400                 n = inb(port + 5);
1401                 if ((n & 0x61) == 0x60)
1402                         break;
1403                 if ((n & 1) == 1)
1404                         (void)inb(port);
1405         }
1406         outb(0x00, port + 4);
1407 }
1408
1409 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1410 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1411 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1412 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1413 #define EN_CCMD         0x000   /* Chip's command register     */
1414 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1415 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1416 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1417 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1418 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1419 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1420 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1421 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1422 static int __init mxser_read_register(int port, unsigned short *regs)
1423 {
1424         int i, k, value, id;
1425         unsigned int j;
1426
1427         id = mxser_program_mode(port);
1428         if (id < 0)
1429                 return id;
1430         for (i = 0; i < 14; i++) {
1431                 k = (i & 0x3F) | 0x180;
1432                 for (j = 0x100; j > 0; j >>= 1) {
1433                         outb(CHIP_CS, port);
1434                         if (k & j) {
1435                                 outb(CHIP_CS | CHIP_DO, port);
1436                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1437                         } else {
1438                                 outb(CHIP_CS, port);
1439                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1440                         }
1441                 }
1442                 (void)inb(port);
1443                 value = 0;
1444                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1445                         outb(CHIP_CS, port);
1446                         outb(CHIP_CS | CHIP_SK, port);
1447                         if (inb(port) & CHIP_DI)
1448                                 value |= j;
1449                 }
1450                 regs[i] = value;
1451                 outb(0, port);
1452         }
1453         mxser_normal_mode(port);
1454         return id;
1455 }
1456
1457 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1458 {
1459         struct mxser_port *port;
1460         int result, status;
1461         unsigned int i, j;
1462         int ret = 0;
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                 lock_kernel();
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                 unlock_kernel();
1476                 return put_user(result, (unsigned long __user *)argp);
1477         case MOXA_GETDATACOUNT:
1478                 lock_kernel();
1479                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1480                         ret = -EFAULT;
1481                 unlock_kernel();
1482                 return ret;
1483         case MOXA_GETMSTATUS:
1484                 lock_kernel();
1485                 for (i = 0; i < MXSER_BOARDS; i++)
1486                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1487                                 port = &mxser_boards[i].ports[j];
1488
1489                                 GMStatus[i].ri = 0;
1490                                 if (!port->ioaddr) {
1491                                         GMStatus[i].dcd = 0;
1492                                         GMStatus[i].dsr = 0;
1493                                         GMStatus[i].cts = 0;
1494                                         continue;
1495                                 }
1496
1497                                 if (!port->tty || !port->tty->termios)
1498                                         GMStatus[i].cflag =
1499                                                 port->normal_termios.c_cflag;
1500                                 else
1501                                         GMStatus[i].cflag =
1502                                                 port->tty->termios->c_cflag;
1503
1504                                 status = inb(port->ioaddr + UART_MSR);
1505                                 if (status & 0x80 /*UART_MSR_DCD */ )
1506                                         GMStatus[i].dcd = 1;
1507                                 else
1508                                         GMStatus[i].dcd = 0;
1509
1510                                 if (status & 0x20 /*UART_MSR_DSR */ )
1511                                         GMStatus[i].dsr = 1;
1512                                 else
1513                                         GMStatus[i].dsr = 0;
1514
1515
1516                                 if (status & 0x10 /*UART_MSR_CTS */ )
1517                                         GMStatus[i].cts = 1;
1518                                 else
1519                                         GMStatus[i].cts = 0;
1520                         }
1521                 unlock_kernel();
1522                 if (copy_to_user(argp, GMStatus,
1523                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1524                         return -EFAULT;
1525                 return 0;
1526         case MOXA_ASPP_MON_EXT: {
1527                 int p, shiftbit;
1528                 unsigned long opmode;
1529                 unsigned cflag, iflag;
1530
1531                 lock_kernel();
1532                 for (i = 0; i < MXSER_BOARDS; i++) {
1533                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1534                                 port = &mxser_boards[i].ports[j];
1535                                 if (!port->ioaddr)
1536                                         continue;
1537
1538                                 status = mxser_get_msr(port->ioaddr, 0, i);
1539
1540                                 if (status & UART_MSR_TERI)
1541                                         port->icount.rng++;
1542                                 if (status & UART_MSR_DDSR)
1543                                         port->icount.dsr++;
1544                                 if (status & UART_MSR_DDCD)
1545                                         port->icount.dcd++;
1546                                 if (status & UART_MSR_DCTS)
1547                                         port->icount.cts++;
1548
1549                                 port->mon_data.modem_status = status;
1550                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1551                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1552                                 mon_data_ext.up_rxcnt[i] =
1553                                         port->mon_data.up_rxcnt;
1554                                 mon_data_ext.up_txcnt[i] =
1555                                         port->mon_data.up_txcnt;
1556                                 mon_data_ext.modem_status[i] =
1557                                         port->mon_data.modem_status;
1558                                 mon_data_ext.baudrate[i] =
1559                                         tty_get_baud_rate(port->tty);
1560
1561                                 if (!port->tty || !port->tty->termios) {
1562                                         cflag = port->normal_termios.c_cflag;
1563                                         iflag = port->normal_termios.c_iflag;
1564                                 } else {
1565                                         cflag = port->tty->termios->c_cflag;
1566                                         iflag = port->tty->termios->c_iflag;
1567                                 }
1568
1569                                 mon_data_ext.databits[i] = cflag & CSIZE;
1570
1571                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1572
1573                                 mon_data_ext.parity[i] =
1574                                         cflag & (PARENB | PARODD | CMSPAR);
1575
1576                                 mon_data_ext.flowctrl[i] = 0x00;
1577
1578                                 if (cflag & CRTSCTS)
1579                                         mon_data_ext.flowctrl[i] |= 0x03;
1580
1581                                 if (iflag & (IXON | IXOFF))
1582                                         mon_data_ext.flowctrl[i] |= 0x0C;
1583
1584                                 if (port->type == PORT_16550A)
1585                                         mon_data_ext.fifo[i] = 1;
1586                                 else
1587                                         mon_data_ext.fifo[i] = 0;
1588
1589                                 p = i % 4;
1590                                 shiftbit = p * 2;
1591                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1592                                 opmode &= OP_MODE_MASK;
1593
1594                                 mon_data_ext.iftype[i] = opmode;
1595
1596                         }
1597                 }
1598                 unlock_kernel();
1599                 if (copy_to_user(argp, &mon_data_ext,
1600                                         sizeof(mon_data_ext)))
1601                         return -EFAULT;
1602                 return 0;
1603         }
1604         default:
1605                 return -ENOIOCTLCMD;
1606         }
1607         return 0;
1608 }
1609
1610 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1611                 struct async_icount *cprev)
1612 {
1613         struct async_icount cnow;
1614         unsigned long flags;
1615         int ret;
1616
1617         spin_lock_irqsave(&info->slock, flags);
1618         cnow = info->icount;    /* atomic copy */
1619         spin_unlock_irqrestore(&info->slock, flags);
1620
1621         ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1622                 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1623                 ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1624                 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1625
1626         *cprev = cnow;
1627
1628         return ret;
1629 }
1630
1631 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1632                 unsigned int cmd, unsigned long arg)
1633 {
1634         struct mxser_port *info = tty->driver_data;
1635         struct async_icount cnow;
1636         struct serial_icounter_struct __user *p_cuser;
1637         unsigned long flags;
1638         void __user *argp = (void __user *)arg;
1639         int retval;
1640
1641         if (tty->index == MXSER_PORTS)
1642                 return mxser_ioctl_special(cmd, argp);
1643
1644         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1645                 int p;
1646                 unsigned long opmode;
1647                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1648                 int shiftbit;
1649                 unsigned char val, mask;
1650
1651                 p = tty->index % 4;
1652                 if (cmd == MOXA_SET_OP_MODE) {
1653                         if (get_user(opmode, (int __user *) argp))
1654                                 return -EFAULT;
1655                         if (opmode != RS232_MODE &&
1656                                         opmode != RS485_2WIRE_MODE &&
1657                                         opmode != RS422_MODE &&
1658                                         opmode != RS485_4WIRE_MODE)
1659                                 return -EFAULT;
1660                         lock_kernel();
1661                         mask = ModeMask[p];
1662                         shiftbit = p * 2;
1663                         val = inb(info->opmode_ioaddr);
1664                         val &= mask;
1665                         val |= (opmode << shiftbit);
1666                         outb(val, info->opmode_ioaddr);
1667                         unlock_kernel();
1668                 } else {
1669                         lock_kernel();
1670                         shiftbit = p * 2;
1671                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1672                         opmode &= OP_MODE_MASK;
1673                         unlock_kernel();
1674                         if (put_user(opmode, (int __user *)argp))
1675                                 return -EFAULT;
1676                 }
1677                 return 0;
1678         }
1679
1680         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1681                         test_bit(TTY_IO_ERROR, &tty->flags))
1682                 return -EIO;
1683
1684         switch (cmd) {
1685         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1686                 retval = tty_check_change(tty);
1687                 if (retval)
1688                         return retval;
1689                 tty_wait_until_sent(tty, 0);
1690                 if (!arg)
1691                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1692                 return 0;
1693         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1694                 retval = tty_check_change(tty);
1695                 if (retval)
1696                         return retval;
1697                 tty_wait_until_sent(tty, 0);
1698                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1699                 return 0;
1700         case TIOCGSERIAL:
1701                 lock_kernel();
1702                 retval = mxser_get_serial_info(info, argp);
1703                 unlock_kernel();
1704                 return retval;
1705         case TIOCSSERIAL:
1706                 lock_kernel();
1707                 retval = mxser_set_serial_info(info, argp);
1708                 unlock_kernel();
1709                 return retval;
1710         case TIOCSERGETLSR:     /* Get line status register */
1711                 return  mxser_get_lsr_info(info, argp);
1712                 /*
1713                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1714                  * - mask passed in arg for lines of interest
1715                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1716                  * Caller should use TIOCGICOUNT to see which one it was
1717                  */
1718         case TIOCMIWAIT:
1719                 spin_lock_irqsave(&info->slock, flags);
1720                 cnow = info->icount;    /* note the counters on entry */
1721                 spin_unlock_irqrestore(&info->slock, flags);
1722
1723                 return wait_event_interruptible(info->delta_msr_wait,
1724                                 mxser_cflags_changed(info, arg, &cnow));
1725         /*
1726          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1727          * Return: write counters to the user passed counter struct
1728          * NB: both 1->0 and 0->1 transitions are counted except for
1729          *     RI where only 0->1 is counted.
1730          */
1731         case TIOCGICOUNT:
1732                 spin_lock_irqsave(&info->slock, flags);
1733                 cnow = info->icount;
1734                 spin_unlock_irqrestore(&info->slock, flags);
1735                 p_cuser = argp;
1736                 if (put_user(cnow.frame, &p_cuser->frame))
1737                         return -EFAULT;
1738                 if (put_user(cnow.brk, &p_cuser->brk))
1739                         return -EFAULT;
1740                 if (put_user(cnow.overrun, &p_cuser->overrun))
1741                         return -EFAULT;
1742                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1743                         return -EFAULT;
1744                 if (put_user(cnow.parity, &p_cuser->parity))
1745                         return -EFAULT;
1746                 if (put_user(cnow.rx, &p_cuser->rx))
1747                         return -EFAULT;
1748                 if (put_user(cnow.tx, &p_cuser->tx))
1749                         return -EFAULT;
1750                 put_user(cnow.cts, &p_cuser->cts);
1751                 put_user(cnow.dsr, &p_cuser->dsr);
1752                 put_user(cnow.rng, &p_cuser->rng);
1753                 put_user(cnow.dcd, &p_cuser->dcd);
1754                 return 0;
1755         case MOXA_HighSpeedOn:
1756                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1757         case MOXA_SDS_RSTICOUNTER:
1758                 lock_kernel();
1759                 info->mon_data.rxcnt = 0;
1760                 info->mon_data.txcnt = 0;
1761                 unlock_kernel();
1762                 return 0;
1763
1764         case MOXA_ASPP_OQUEUE:{
1765                 int len, lsr;
1766
1767                 lock_kernel();
1768                 len = mxser_chars_in_buffer(tty);
1769                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1770                 len += (lsr ? 0 : 1);
1771                 unlock_kernel();
1772
1773                 return put_user(len, (int __user *)argp);
1774         }
1775         case MOXA_ASPP_MON: {
1776                 int mcr, status;
1777
1778                 lock_kernel();
1779                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1780                 mxser_check_modem_status(info, status);
1781
1782                 mcr = inb(info->ioaddr + UART_MCR);
1783                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1784                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1785                 else
1786                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1787
1788                 if (mcr & MOXA_MUST_MCR_TX_XON)
1789                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1790                 else
1791                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1792
1793                 if (info->tty->hw_stopped)
1794                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1795                 else
1796                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1797                 unlock_kernel();
1798                 if (copy_to_user(argp, &info->mon_data,
1799                                 sizeof(struct mxser_mon)))
1800                         return -EFAULT;
1801
1802                 return 0;
1803         }
1804         case MOXA_ASPP_LSTATUS: {
1805                 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1806                         return -EFAULT;
1807
1808                 info->err_shadow = 0;
1809                 return 0;
1810         }
1811         case MOXA_SET_BAUD_METHOD: {
1812                 int method;
1813
1814                 if (get_user(method, (int __user *)argp))
1815                         return -EFAULT;
1816                 mxser_set_baud_method[tty->index] = method;
1817                 return put_user(method, (int __user *)argp);
1818         }
1819         default:
1820                 return -ENOIOCTLCMD;
1821         }
1822         return 0;
1823 }
1824
1825 static void mxser_stoprx(struct tty_struct *tty)
1826 {
1827         struct mxser_port *info = tty->driver_data;
1828
1829         info->ldisc_stop_rx = 1;
1830         if (I_IXOFF(tty)) {
1831                 if (info->board->chip_flag) {
1832                         info->IER &= ~MOXA_MUST_RECV_ISR;
1833                         outb(info->IER, info->ioaddr + UART_IER);
1834                 } else {
1835                         info->x_char = STOP_CHAR(tty);
1836                         outb(0, info->ioaddr + UART_IER);
1837                         info->IER |= UART_IER_THRI;
1838                         outb(info->IER, info->ioaddr + UART_IER);
1839                 }
1840         }
1841
1842         if (info->tty->termios->c_cflag & CRTSCTS) {
1843                 info->MCR &= ~UART_MCR_RTS;
1844                 outb(info->MCR, info->ioaddr + UART_MCR);
1845         }
1846 }
1847
1848 /*
1849  * This routine is called by the upper-layer tty layer to signal that
1850  * incoming characters should be throttled.
1851  */
1852 static void mxser_throttle(struct tty_struct *tty)
1853 {
1854         mxser_stoprx(tty);
1855 }
1856
1857 static void mxser_unthrottle(struct tty_struct *tty)
1858 {
1859         struct mxser_port *info = tty->driver_data;
1860
1861         /* startrx */
1862         info->ldisc_stop_rx = 0;
1863         if (I_IXOFF(tty)) {
1864                 if (info->x_char)
1865                         info->x_char = 0;
1866                 else {
1867                         if (info->board->chip_flag) {
1868                                 info->IER |= MOXA_MUST_RECV_ISR;
1869                                 outb(info->IER, info->ioaddr + UART_IER);
1870                         } else {
1871                                 info->x_char = START_CHAR(tty);
1872                                 outb(0, info->ioaddr + UART_IER);
1873                                 info->IER |= UART_IER_THRI;
1874                                 outb(info->IER, info->ioaddr + UART_IER);
1875                         }
1876                 }
1877         }
1878
1879         if (info->tty->termios->c_cflag & CRTSCTS) {
1880                 info->MCR |= UART_MCR_RTS;
1881                 outb(info->MCR, info->ioaddr + UART_MCR);
1882         }
1883 }
1884
1885 /*
1886  * mxser_stop() and mxser_start()
1887  *
1888  * This routines are called before setting or resetting tty->stopped.
1889  * They enable or disable transmitter interrupts, as necessary.
1890  */
1891 static void mxser_stop(struct tty_struct *tty)
1892 {
1893         struct mxser_port *info = tty->driver_data;
1894         unsigned long flags;
1895
1896         spin_lock_irqsave(&info->slock, flags);
1897         if (info->IER & UART_IER_THRI) {
1898                 info->IER &= ~UART_IER_THRI;
1899                 outb(info->IER, info->ioaddr + UART_IER);
1900         }
1901         spin_unlock_irqrestore(&info->slock, flags);
1902 }
1903
1904 static void mxser_start(struct tty_struct *tty)
1905 {
1906         struct mxser_port *info = tty->driver_data;
1907         unsigned long flags;
1908
1909         spin_lock_irqsave(&info->slock, flags);
1910         if (info->xmit_cnt && info->xmit_buf) {
1911                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1912                 info->IER |= UART_IER_THRI;
1913                 outb(info->IER, info->ioaddr + UART_IER);
1914         }
1915         spin_unlock_irqrestore(&info->slock, flags);
1916 }
1917
1918 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1919 {
1920         struct mxser_port *info = tty->driver_data;
1921         unsigned long flags;
1922
1923         spin_lock_irqsave(&info->slock, flags);
1924         mxser_change_speed(info, old_termios);
1925         spin_unlock_irqrestore(&info->slock, flags);
1926
1927         if ((old_termios->c_cflag & CRTSCTS) &&
1928                         !(tty->termios->c_cflag & CRTSCTS)) {
1929                 tty->hw_stopped = 0;
1930                 mxser_start(tty);
1931         }
1932
1933         /* Handle sw stopped */
1934         if ((old_termios->c_iflag & IXON) &&
1935                         !(tty->termios->c_iflag & IXON)) {
1936                 tty->stopped = 0;
1937
1938                 if (info->board->chip_flag) {
1939                         spin_lock_irqsave(&info->slock, flags);
1940                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1941                         spin_unlock_irqrestore(&info->slock, flags);
1942                 }
1943
1944                 mxser_start(tty);
1945         }
1946 }
1947
1948 /*
1949  * mxser_wait_until_sent() --- wait until the transmitter is empty
1950  */
1951 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1952 {
1953         struct mxser_port *info = tty->driver_data;
1954         unsigned long orig_jiffies, char_time;
1955         int lsr;
1956
1957         if (info->type == PORT_UNKNOWN)
1958                 return;
1959
1960         if (info->xmit_fifo_size == 0)
1961                 return;         /* Just in case.... */
1962
1963         orig_jiffies = jiffies;
1964         /*
1965          * Set the check interval to be 1/5 of the estimated time to
1966          * send a single character, and make it at least 1.  The check
1967          * interval should also be less than the timeout.
1968          *
1969          * Note: we have to use pretty tight timings here to satisfy
1970          * the NIST-PCTS.
1971          */
1972         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1973         char_time = char_time / 5;
1974         if (char_time == 0)
1975                 char_time = 1;
1976         if (timeout && timeout < char_time)
1977                 char_time = timeout;
1978         /*
1979          * If the transmitter hasn't cleared in twice the approximate
1980          * amount of time to send the entire FIFO, it probably won't
1981          * ever clear.  This assumes the UART isn't doing flow
1982          * control, which is currently the case.  Hence, if it ever
1983          * takes longer than info->timeout, this is probably due to a
1984          * UART bug of some kind.  So, we clamp the timeout parameter at
1985          * 2*info->timeout.
1986          */
1987         if (!timeout || timeout > 2 * info->timeout)
1988                 timeout = 2 * info->timeout;
1989 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1990         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1991                 timeout, char_time);
1992         printk("jiff=%lu...", jiffies);
1993 #endif
1994         lock_kernel();
1995         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1996 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1997                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1998 #endif
1999                 schedule_timeout_interruptible(char_time);
2000                 if (signal_pending(current))
2001                         break;
2002                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2003                         break;
2004         }
2005         set_current_state(TASK_RUNNING);
2006         unlock_kernel();
2007
2008 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2009         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2010 #endif
2011 }
2012
2013 /*
2014  * This routine is called by tty_hangup() when a hangup is signaled.
2015  */
2016 static void mxser_hangup(struct tty_struct *tty)
2017 {
2018         struct mxser_port *info = tty->driver_data;
2019
2020         mxser_flush_buffer(tty);
2021         mxser_shutdown(info);
2022         info->event = 0;
2023         info->count = 0;
2024         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2025         info->tty = NULL;
2026         wake_up_interruptible(&info->open_wait);
2027 }
2028
2029 /*
2030  * mxser_rs_break() --- routine which turns the break handling on or off
2031  */
2032 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2033 {
2034         struct mxser_port *info = tty->driver_data;
2035         unsigned long flags;
2036
2037         spin_lock_irqsave(&info->slock, flags);
2038         if (break_state == -1)
2039                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2040                         info->ioaddr + UART_LCR);
2041         else
2042                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2043                         info->ioaddr + UART_LCR);
2044         spin_unlock_irqrestore(&info->slock, flags);
2045 }
2046
2047 static void mxser_receive_chars(struct mxser_port *port, int *status)
2048 {
2049         struct tty_struct *tty = port->tty;
2050         unsigned char ch, gdl;
2051         int ignored = 0;
2052         int cnt = 0;
2053         int recv_room;
2054         int max = 256;
2055
2056         recv_room = tty->receive_room;
2057         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2058                 mxser_stoprx(tty);
2059
2060         if (port->board->chip_flag != MOXA_OTHER_UART) {
2061
2062                 if (*status & UART_LSR_SPECIAL)
2063                         goto intr_old;
2064                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2065                                 (*status & MOXA_MUST_LSR_RERR))
2066                         goto intr_old;
2067                 if (*status & MOXA_MUST_LSR_RERR)
2068                         goto intr_old;
2069
2070                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2071
2072                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2073                         gdl &= MOXA_MUST_GDL_MASK;
2074                 if (gdl >= recv_room) {
2075                         if (!port->ldisc_stop_rx)
2076                                 mxser_stoprx(tty);
2077                 }
2078                 while (gdl--) {
2079                         ch = inb(port->ioaddr + UART_RX);
2080                         tty_insert_flip_char(tty, ch, 0);
2081                         cnt++;
2082                 }
2083                 goto end_intr;
2084         }
2085 intr_old:
2086
2087         do {
2088                 if (max-- < 0)
2089                         break;
2090
2091                 ch = inb(port->ioaddr + UART_RX);
2092                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2093                         outb(0x23, port->ioaddr + UART_FCR);
2094                 *status &= port->read_status_mask;
2095                 if (*status & port->ignore_status_mask) {
2096                         if (++ignored > 100)
2097                                 break;
2098                 } else {
2099                         char flag = 0;
2100                         if (*status & UART_LSR_SPECIAL) {
2101                                 if (*status & UART_LSR_BI) {
2102                                         flag = TTY_BREAK;
2103                                         port->icount.brk++;
2104
2105                                         if (port->flags & ASYNC_SAK)
2106                                                 do_SAK(tty);
2107                                 } else if (*status & UART_LSR_PE) {
2108                                         flag = TTY_PARITY;
2109                                         port->icount.parity++;
2110                                 } else if (*status & UART_LSR_FE) {
2111                                         flag = TTY_FRAME;
2112                                         port->icount.frame++;
2113                                 } else if (*status & UART_LSR_OE) {
2114                                         flag = TTY_OVERRUN;
2115                                         port->icount.overrun++;
2116                                 } else
2117                                         flag = TTY_BREAK;
2118                         }
2119                         tty_insert_flip_char(tty, ch, flag);
2120                         cnt++;
2121                         if (cnt >= recv_room) {
2122                                 if (!port->ldisc_stop_rx)
2123                                         mxser_stoprx(tty);
2124                                 break;
2125                         }
2126
2127                 }
2128
2129                 if (port->board->chip_flag)
2130                         break;
2131
2132                 *status = inb(port->ioaddr + UART_LSR);
2133         } while (*status & UART_LSR_DR);
2134
2135 end_intr:
2136         mxvar_log.rxcnt[port->tty->index] += cnt;
2137         port->mon_data.rxcnt += cnt;
2138         port->mon_data.up_rxcnt += cnt;
2139
2140         /*
2141          * We are called from an interrupt context with &port->slock
2142          * being held. Drop it temporarily in order to prevent
2143          * recursive locking.
2144          */
2145         spin_unlock(&port->slock);
2146         tty_flip_buffer_push(tty);
2147         spin_lock(&port->slock);
2148 }
2149
2150 static void mxser_transmit_chars(struct mxser_port *port)
2151 {
2152         int count, cnt;
2153
2154         if (port->x_char) {
2155                 outb(port->x_char, port->ioaddr + UART_TX);
2156                 port->x_char = 0;
2157                 mxvar_log.txcnt[port->tty->index]++;
2158                 port->mon_data.txcnt++;
2159                 port->mon_data.up_txcnt++;
2160                 port->icount.tx++;
2161                 return;
2162         }
2163
2164         if (port->xmit_buf == NULL)
2165                 return;
2166
2167         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2168                         (port->tty->hw_stopped &&
2169                         (port->type != PORT_16550A) &&
2170                         (!port->board->chip_flag))) {
2171                 port->IER &= ~UART_IER_THRI;
2172                 outb(port->IER, port->ioaddr + UART_IER);
2173                 return;
2174         }
2175
2176         cnt = port->xmit_cnt;
2177         count = port->xmit_fifo_size;
2178         do {
2179                 outb(port->xmit_buf[port->xmit_tail++],
2180                         port->ioaddr + UART_TX);
2181                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2182                 if (--port->xmit_cnt <= 0)
2183                         break;
2184         } while (--count > 0);
2185         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2186
2187         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2188         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2189         port->icount.tx += (cnt - port->xmit_cnt);
2190
2191         if (port->xmit_cnt < WAKEUP_CHARS)
2192                 tty_wakeup(port->tty);
2193
2194         if (port->xmit_cnt <= 0) {
2195                 port->IER &= ~UART_IER_THRI;
2196                 outb(port->IER, port->ioaddr + UART_IER);
2197         }
2198 }
2199
2200 /*
2201  * This is the serial driver's generic interrupt routine
2202  */
2203 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2204 {
2205         int status, iir, i;
2206         struct mxser_board *brd = NULL;
2207         struct mxser_port *port;
2208         int max, irqbits, bits, msr;
2209         unsigned int int_cnt, pass_counter = 0;
2210         int handled = IRQ_NONE;
2211
2212         for (i = 0; i < MXSER_BOARDS; i++)
2213                 if (dev_id == &mxser_boards[i]) {
2214                         brd = dev_id;
2215                         break;
2216                 }
2217
2218         if (i == MXSER_BOARDS)
2219                 goto irq_stop;
2220         if (brd == NULL)
2221                 goto irq_stop;
2222         max = brd->info->nports;
2223         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2224                 irqbits = inb(brd->vector) & brd->vector_mask;
2225                 if (irqbits == brd->vector_mask)
2226                         break;
2227
2228                 handled = IRQ_HANDLED;
2229                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2230                         if (irqbits == brd->vector_mask)
2231                                 break;
2232                         if (bits & irqbits)
2233                                 continue;
2234                         port = &brd->ports[i];
2235
2236                         int_cnt = 0;
2237                         spin_lock(&port->slock);
2238                         do {
2239                                 iir = inb(port->ioaddr + UART_IIR);
2240                                 if (iir & UART_IIR_NO_INT)
2241                                         break;
2242                                 iir &= MOXA_MUST_IIR_MASK;
2243                                 if (!port->tty ||
2244                                                 (port->flags & ASYNC_CLOSING) ||
2245                                                 !(port->flags &
2246                                                         ASYNC_INITIALIZED)) {
2247                                         status = inb(port->ioaddr + UART_LSR);
2248                                         outb(0x27, port->ioaddr + UART_FCR);
2249                                         inb(port->ioaddr + UART_MSR);
2250                                         break;
2251                                 }
2252
2253                                 status = inb(port->ioaddr + UART_LSR);
2254
2255                                 if (status & UART_LSR_PE)
2256                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2257                                 if (status & UART_LSR_FE)
2258                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2259                                 if (status & UART_LSR_OE)
2260                                         port->err_shadow |=
2261                                                 NPPI_NOTIFY_HW_OVERRUN;
2262                                 if (status & UART_LSR_BI)
2263                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2264
2265                                 if (port->board->chip_flag) {
2266                                         if (iir == MOXA_MUST_IIR_GDA ||
2267                                             iir == MOXA_MUST_IIR_RDA ||
2268                                             iir == MOXA_MUST_IIR_RTO ||
2269                                             iir == MOXA_MUST_IIR_LSR)
2270                                                 mxser_receive_chars(port,
2271                                                                 &status);
2272
2273                                 } else {
2274                                         status &= port->read_status_mask;
2275                                         if (status & UART_LSR_DR)
2276                                                 mxser_receive_chars(port,
2277                                                                 &status);
2278                                 }
2279                                 msr = inb(port->ioaddr + UART_MSR);
2280                                 if (msr & UART_MSR_ANY_DELTA)
2281                                         mxser_check_modem_status(port, msr);
2282
2283                                 if (port->board->chip_flag) {
2284                                         if (iir == 0x02 && (status &
2285                                                                 UART_LSR_THRE))
2286                                                 mxser_transmit_chars(port);
2287                                 } else {
2288                                         if (status & UART_LSR_THRE)
2289                                                 mxser_transmit_chars(port);
2290                                 }
2291                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2292                         spin_unlock(&port->slock);
2293                 }
2294         }
2295
2296 irq_stop:
2297         return handled;
2298 }
2299
2300 static const struct tty_operations mxser_ops = {
2301         .open = mxser_open,
2302         .close = mxser_close,
2303         .write = mxser_write,
2304         .put_char = mxser_put_char,
2305         .flush_chars = mxser_flush_chars,
2306         .write_room = mxser_write_room,
2307         .chars_in_buffer = mxser_chars_in_buffer,
2308         .flush_buffer = mxser_flush_buffer,
2309         .ioctl = mxser_ioctl,
2310         .throttle = mxser_throttle,
2311         .unthrottle = mxser_unthrottle,
2312         .set_termios = mxser_set_termios,
2313         .stop = mxser_stop,
2314         .start = mxser_start,
2315         .hangup = mxser_hangup,
2316         .break_ctl = mxser_rs_break,
2317         .wait_until_sent = mxser_wait_until_sent,
2318         .tiocmget = mxser_tiocmget,
2319         .tiocmset = mxser_tiocmset,
2320 };
2321
2322 /*
2323  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2324  */
2325
2326 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2327                 unsigned int irq)
2328 {
2329         if (irq)
2330                 free_irq(brd->irq, brd);
2331         if (pdev != NULL) {     /* PCI */
2332 #ifdef CONFIG_PCI
2333                 pci_release_region(pdev, 2);
2334                 pci_release_region(pdev, 3);
2335 #endif
2336         } else {
2337                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2338                 release_region(brd->vector, 1);
2339         }
2340 }
2341
2342 static int __devinit mxser_initbrd(struct mxser_board *brd,
2343                 struct pci_dev *pdev)
2344 {
2345         struct mxser_port *info;
2346         unsigned int i;
2347         int retval;
2348
2349         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2350
2351         for (i = 0; i < brd->info->nports; i++) {
2352                 info = &brd->ports[i];
2353                 info->board = brd;
2354                 info->stop_rx = 0;
2355                 info->ldisc_stop_rx = 0;
2356
2357                 /* Enhance mode enabled here */
2358                 if (brd->chip_flag != MOXA_OTHER_UART)
2359                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2360
2361                 info->flags = ASYNC_SHARE_IRQ;
2362                 info->type = brd->uart_type;
2363
2364                 process_txrx_fifo(info);
2365
2366                 info->custom_divisor = info->baud_base * 16;
2367                 info->close_delay = 5 * HZ / 10;
2368                 info->closing_wait = 30 * HZ;
2369                 info->normal_termios = mxvar_sdriver->init_termios;
2370                 init_waitqueue_head(&info->open_wait);
2371                 init_waitqueue_head(&info->delta_msr_wait);
2372                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2373                 info->err_shadow = 0;
2374                 spin_lock_init(&info->slock);
2375
2376                 /* before set INT ISR, disable all int */
2377                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2378                         info->ioaddr + UART_IER);
2379         }
2380
2381         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2382                         brd);
2383         if (retval) {
2384                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2385                         "conflict with another device.\n",
2386                         brd->info->name, brd->irq);
2387                 /* We hold resources, we need to release them. */
2388                 mxser_release_res(brd, pdev, 0);
2389         }
2390         return retval;
2391 }
2392
2393 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2394 {
2395         int id, i, bits;
2396         unsigned short regs[16], irq;
2397         unsigned char scratch, scratch2;
2398
2399         brd->chip_flag = MOXA_OTHER_UART;
2400
2401         id = mxser_read_register(cap, regs);
2402         switch (id) {
2403         case C168_ASIC_ID:
2404                 brd->info = &mxser_cards[0];
2405                 break;
2406         case C104_ASIC_ID:
2407                 brd->info = &mxser_cards[1];
2408                 break;
2409         case CI104J_ASIC_ID:
2410                 brd->info = &mxser_cards[2];
2411                 break;
2412         case C102_ASIC_ID:
2413                 brd->info = &mxser_cards[5];
2414                 break;
2415         case CI132_ASIC_ID:
2416                 brd->info = &mxser_cards[6];
2417                 break;
2418         case CI134_ASIC_ID:
2419                 brd->info = &mxser_cards[7];
2420                 break;
2421         default:
2422                 return 0;
2423         }
2424
2425         irq = 0;
2426         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2427            Flag-hack checks if configuration should be read as 2-port here. */
2428         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2429                 irq = regs[9] & 0xF000;
2430                 irq = irq | (irq >> 4);
2431                 if (irq != (regs[9] & 0xFF00))
2432                         return MXSER_ERR_IRQ_CONFLIT;
2433         } else if (brd->info->nports == 4) {
2434                 irq = regs[9] & 0xF000;
2435                 irq = irq | (irq >> 4);
2436                 irq = irq | (irq >> 8);
2437                 if (irq != regs[9])
2438                         return MXSER_ERR_IRQ_CONFLIT;
2439         } else if (brd->info->nports == 8) {
2440                 irq = regs[9] & 0xF000;
2441                 irq = irq | (irq >> 4);
2442                 irq = irq | (irq >> 8);
2443                 if ((irq != regs[9]) || (irq != regs[10]))
2444                         return MXSER_ERR_IRQ_CONFLIT;
2445         }
2446
2447         if (!irq)
2448                 return MXSER_ERR_IRQ;
2449         brd->irq = ((int)(irq & 0xF000) >> 12);
2450         for (i = 0; i < 8; i++)
2451                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2452         if ((regs[12] & 0x80) == 0)
2453                 return MXSER_ERR_VECTOR;
2454         brd->vector = (int)regs[11];    /* interrupt vector */
2455         if (id == 1)
2456                 brd->vector_mask = 0x00FF;
2457         else
2458                 brd->vector_mask = 0x000F;
2459         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2460                 if (regs[12] & bits) {
2461                         brd->ports[i].baud_base = 921600;
2462                         brd->ports[i].max_baud = 921600;
2463                 } else {
2464                         brd->ports[i].baud_base = 115200;
2465                         brd->ports[i].max_baud = 115200;
2466                 }
2467         }
2468         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2469         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2470         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2471         outb(scratch2, cap + UART_LCR);
2472         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2473         scratch = inb(cap + UART_IIR);
2474
2475         if (scratch & 0xC0)
2476                 brd->uart_type = PORT_16550A;
2477         else
2478                 brd->uart_type = PORT_16450;
2479         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2480                         "mxser(IO)"))
2481                 return MXSER_ERR_IOADDR;
2482         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2483                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2484                 return MXSER_ERR_VECTOR;
2485         }
2486         return brd->info->nports;
2487 }
2488
2489 static int __devinit mxser_probe(struct pci_dev *pdev,
2490                 const struct pci_device_id *ent)
2491 {
2492 #ifdef CONFIG_PCI
2493         struct mxser_board *brd;
2494         unsigned int i, j;
2495         unsigned long ioaddress;
2496         int retval = -EINVAL;
2497
2498         for (i = 0; i < MXSER_BOARDS; i++)
2499                 if (mxser_boards[i].info == NULL)
2500                         break;
2501
2502         if (i >= MXSER_BOARDS) {
2503                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2504                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2505                 goto err;
2506         }
2507
2508         brd = &mxser_boards[i];
2509         brd->idx = i * MXSER_PORTS_PER_BOARD;
2510         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2511                 mxser_cards[ent->driver_data].name,
2512                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2513
2514         retval = pci_enable_device(pdev);
2515         if (retval) {
2516                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2517                 goto err;
2518         }
2519
2520         /* io address */
2521         ioaddress = pci_resource_start(pdev, 2);
2522         retval = pci_request_region(pdev, 2, "mxser(IO)");
2523         if (retval)
2524                 goto err;
2525
2526         brd->info = &mxser_cards[ent->driver_data];
2527         for (i = 0; i < brd->info->nports; i++)
2528                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2529
2530         /* vector */
2531         ioaddress = pci_resource_start(pdev, 3);
2532         retval = pci_request_region(pdev, 3, "mxser(vector)");
2533         if (retval)
2534                 goto err_relio;
2535         brd->vector = ioaddress;
2536
2537         /* irq */
2538         brd->irq = pdev->irq;
2539
2540         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2541         brd->uart_type = PORT_16550A;
2542         brd->vector_mask = 0;
2543
2544         for (i = 0; i < brd->info->nports; i++) {
2545                 for (j = 0; j < UART_INFO_NUM; j++) {
2546                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2547                                 brd->ports[i].max_baud =
2548                                         Gpci_uart_info[j].max_baud;
2549
2550                                 /* exception....CP-102 */
2551                                 if (brd->info->flags & MXSER_HIGHBAUD)
2552                                         brd->ports[i].max_baud = 921600;
2553                                 break;
2554                         }
2555                 }
2556         }
2557
2558         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2559                 for (i = 0; i < brd->info->nports; i++) {
2560                         if (i < 4)
2561                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2562                         else
2563                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2564                 }
2565                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2566                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2567         }
2568
2569         for (i = 0; i < brd->info->nports; i++) {
2570                 brd->vector_mask |= (1 << i);
2571                 brd->ports[i].baud_base = 921600;
2572         }
2573
2574         /* mxser_initbrd will hook ISR. */
2575         retval = mxser_initbrd(brd, pdev);
2576         if (retval)
2577                 goto err_null;
2578
2579         for (i = 0; i < brd->info->nports; i++)
2580                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2581
2582         pci_set_drvdata(pdev, brd);
2583
2584         return 0;
2585 err_relio:
2586         pci_release_region(pdev, 2);
2587 err_null:
2588         brd->info = NULL;
2589 err:
2590         return retval;
2591 #else
2592         return -ENODEV;
2593 #endif
2594 }
2595
2596 static void __devexit mxser_remove(struct pci_dev *pdev)
2597 {
2598         struct mxser_board *brd = pci_get_drvdata(pdev);
2599         unsigned int i;
2600
2601         for (i = 0; i < brd->info->nports; i++)
2602                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2603
2604         mxser_release_res(brd, pdev, 1);
2605         brd->info = NULL;
2606 }
2607
2608 static struct pci_driver mxser_driver = {
2609         .name = "mxser",
2610         .id_table = mxser_pcibrds,
2611         .probe = mxser_probe,
2612         .remove = __devexit_p(mxser_remove)
2613 };
2614
2615 static int __init mxser_module_init(void)
2616 {
2617         struct mxser_board *brd;
2618         unsigned long cap;
2619         unsigned int i, m, isaloop;
2620         int retval, b;
2621
2622         pr_debug("Loading module mxser ...\n");
2623
2624         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2625         if (!mxvar_sdriver)
2626                 return -ENOMEM;
2627
2628         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2629                 MXSER_VERSION);
2630
2631         /* Initialize the tty_driver structure */
2632         mxvar_sdriver->owner = THIS_MODULE;
2633         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2634         mxvar_sdriver->name = "ttyMI";
2635         mxvar_sdriver->major = ttymajor;
2636         mxvar_sdriver->minor_start = 0;
2637         mxvar_sdriver->num = MXSER_PORTS + 1;
2638         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2639         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2640         mxvar_sdriver->init_termios = tty_std_termios;
2641         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2642         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2643         tty_set_operations(mxvar_sdriver, &mxser_ops);
2644
2645         retval = tty_register_driver(mxvar_sdriver);
2646         if (retval) {
2647                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2648                                 "tty driver !\n");
2649                 goto err_put;
2650         }
2651
2652         mxvar_diagflag = 0;
2653
2654         m = 0;
2655         /* Start finding ISA boards here */
2656         for (isaloop = 0; isaloop < 2; isaloop++)
2657                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2658                         if (!isaloop)
2659                                 cap = mxserBoardCAP[b]; /* predefined */
2660                         else
2661                                 cap = ioaddr[b]; /* module param */
2662
2663                         if (!cap)
2664                                 continue;
2665
2666                         brd = &mxser_boards[m];
2667                         retval = mxser_get_ISA_conf(cap, brd);
2668
2669                         if (retval != 0)
2670                                 printk(KERN_INFO "Found MOXA %s board "
2671                                         "(CAP=0x%x)\n",
2672                                         brd->info->name, ioaddr[b]);
2673
2674                         if (retval <= 0) {
2675                                 if (retval == MXSER_ERR_IRQ)
2676                                         printk(KERN_ERR "Invalid interrupt "
2677                                                 "number, board not "
2678                                                 "configured\n");
2679                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2680                                         printk(KERN_ERR "Invalid interrupt "
2681                                                 "number, board not "
2682                                                 "configured\n");
2683                                 else if (retval == MXSER_ERR_VECTOR)
2684                                         printk(KERN_ERR "Invalid interrupt "
2685                                                 "vector, board not "
2686                                                 "configured\n");
2687                                 else if (retval == MXSER_ERR_IOADDR)
2688                                         printk(KERN_ERR "Invalid I/O address, "
2689                                                 "board not configured\n");
2690
2691                                 brd->info = NULL;
2692                                 continue;
2693                         }
2694
2695                         /* mxser_initbrd will hook ISR. */
2696                         if (mxser_initbrd(brd, NULL) < 0) {
2697                                 brd->info = NULL;
2698                                 continue;
2699                         }
2700
2701                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2702                         for (i = 0; i < brd->info->nports; i++)
2703                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2704                                                 NULL);
2705
2706                         m++;
2707                 }
2708
2709         retval = pci_register_driver(&mxser_driver);
2710         if (retval) {
2711                 printk(KERN_ERR "Can't register pci driver\n");
2712                 if (!m) {
2713                         retval = -ENODEV;
2714                         goto err_unr;
2715                 } /* else: we have some ISA cards under control */
2716         }
2717
2718         pr_debug("Done.\n");
2719
2720         return 0;
2721 err_unr:
2722         tty_unregister_driver(mxvar_sdriver);
2723 err_put:
2724         put_tty_driver(mxvar_sdriver);
2725         return retval;
2726 }
2727
2728 static void __exit mxser_module_exit(void)
2729 {
2730         unsigned int i, j;
2731
2732         pr_debug("Unloading module mxser ...\n");
2733
2734         pci_unregister_driver(&mxser_driver);
2735
2736         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2737                 if (mxser_boards[i].info != NULL)
2738                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2739                                 tty_unregister_device(mxvar_sdriver,
2740                                                 mxser_boards[i].idx + j);
2741         tty_unregister_driver(mxvar_sdriver);
2742         put_tty_driver(mxvar_sdriver);
2743
2744         for (i = 0; i < MXSER_BOARDS; i++)
2745                 if (mxser_boards[i].info != NULL)
2746                         mxser_release_res(&mxser_boards[i], NULL, 1);
2747
2748         pr_debug("Done.\n");
2749 }
2750
2751 module_init(mxser_module_init);
2752 module_exit(mxser_module_exit);