drivers/char/mxser_new.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com.tw).
   5  *      Copyright (C) 2006-2007  Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  18  *      - Fixed x86_64 cleanness
  19  *      - Fixed sleep with spinlock held in mxser_send_break
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/autoconf.h>
  24 #include <linux/errno.h>
  25 #include <linux/signal.h>
  26 #include <linux/sched.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serial_reg.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/gfp.h>
  38 #include <linux/ioport.h>
  39 #include <linux/mm.h>
  40 #include <linux/delay.h>
  41 #include <linux/pci.h>
  42 #include <linux/bitops.h>
  43
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/uaccess.h>
  48
  49 #include "mxser_new.h"
  50
  51 #define MXSER_VERSION   "2.0.2"         /* 1.10 */
  52 #define MXSERMAJOR       174
  53 #define MXSERCUMAJOR     175
  54
  55 #define MXSER_BOARDS            4       /* Max. boards */
  56 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  57 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  58 #define MXSER_ISR_PASS_LIMIT    100
  59
  60 #define MXSER_ERR_IOADDR        -1
  61 #define MXSER_ERR_IRQ           -2
  62 #define MXSER_ERR_IRQ_CONFLIT   -3
  63 #define MXSER_ERR_VECTOR        -4
  64
  65 /*CheckIsMoxaMust return value*/
  66 #define MOXA_OTHER_UART         0x00
  67 #define MOXA_MUST_MU150_HWID    0x01
  68 #define MOXA_MUST_MU860_HWID    0x02
  69
  70 #define WAKEUP_CHARS            256
  71
  72 #define UART_MCR_AFE            0x20
  73 #define UART_LSR_SPECIAL        0x1E
  74
  75 #define PCI_DEVICE_ID_CB108     0x1080
  76 #define PCI_DEVICE_ID_CB114     0x1142
  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         unsigned int nports;
 111         char *name;
 112         unsigned int flags;
 113 };
 114
 115 static const struct mxser_cardinfo mxser_cards[] = {
 116 /* 0*/  { 8, "C168 series", },
 117         { 4, "C104 series", },
 118         { 4, "CI-104J series", },
 119         { 8, "C168H/PCI series", },
 120         { 4, "C104H/PCI series", },
 121 /* 5*/  { 4, "C102 series", MXSER_HAS2 },       /* C102-ISA */
 122         { 4, "CI-132 series", MXSER_HAS2 },
 123         { 4, "CI-134 series", },
 124         { 2, "CP-132 series", },
 125         { 4, "CP-114 series", },
 126 /*10*/  { 4, "CT-114 series", },
 127         { 2, "CP-102 series", MXSER_HIGHBAUD },
 128         { 4, "CP-104U series", },
 129         { 8, "CP-168U series", },
 130         { 2, "CP-132U series", },
 131 /*15*/  { 4, "CP-134U series", },
 132         { 4, "CP-104JU series", },
 133         { 8, "Moxa UC7000 Serial", },           /* RC7000 */
 134         { 8, "CP-118U series", },
 135         { 2, "CP-102UL series", },
 136 /*20*/  { 2, "CP-102U series", },
 137         { 8, "CP-118EL series", },
 138         { 8, "CP-168EL series", },
 139         { 4, "CP-104EL series", },
 140         { 8, "CB-108 series", },
 141 /*25*/  { 4, "CB-114 series", },
 142         { 4, "CB-134I series", },
 143         { 8, "CP-138U series", },
 144         { 4, "POS-104UL series", }
 145 };
 146
 147 /* driver_data correspond to the lines in the structure above
 148    see also ISA probe function before you change something */
 149 static struct pci_device_id mxser_pcibrds[] = {
 150         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168),   .driver_data = 3 },
 151         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104),   .driver_data = 4 },
 152         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132),  .driver_data = 8 },
 153         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114),  .driver_data = 9 },
 154         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114),  .driver_data = 10 },
 155         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102),  .driver_data = 11 },
 156         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
 157         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
 158         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
 159         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
 160         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
 161         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
 162         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
 163         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
 164         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
 165         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
 166         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
 167         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
 168         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108),       .driver_data = 24 },
 169         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114),       .driver_data = 25 },
 170         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I),      .driver_data = 26 },
 171         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U),      .driver_data = 27 },
 172         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL),    .driver_data = 28 },
 173         { }
 174 };
 175 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 176
 177 static int mxvar_baud_table[] = {
 178         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
 179         4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
 180 };
 181 static unsigned int mxvar_baud_table1[] = {
 182         0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400,
 183         B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600
 184 };
 185 #define BAUD_TABLE_NO ARRAY_SIZE(mxvar_baud_table)
 186
 187 #define B_SPEC  B2000000
 188
 189 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 190 static int ttymajor = MXSERMAJOR;
 191 static int calloutmajor = MXSERCUMAJOR;
 192
 193 /* Variables for insmod */
 194
 195 MODULE_AUTHOR("Casper Yang");
 196 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 197 module_param_array(ioaddr, int, NULL, 0);
 198 module_param(ttymajor, int, 0);
 199 MODULE_LICENSE("GPL");
 200
 201 struct mxser_log {
 202         int tick;
 203         unsigned long rxcnt[MXSER_PORTS];
 204         unsigned long txcnt[MXSER_PORTS];
 205 };
 206
 207
 208 struct mxser_mon {
 209         unsigned long rxcnt;
 210         unsigned long txcnt;
 211         unsigned long up_rxcnt;
 212         unsigned long up_txcnt;
 213         int modem_status;
 214         unsigned char hold_reason;
 215 };
 216
 217 struct mxser_mon_ext {
 218         unsigned long rx_cnt[32];
 219         unsigned long tx_cnt[32];
 220         unsigned long up_rxcnt[32];
 221         unsigned long up_txcnt[32];
 222         int modem_status[32];
 223
 224         long baudrate[32];
 225         int databits[32];
 226         int stopbits[32];
 227         int parity[32];
 228         int flowctrl[32];
 229         int fifo[32];
 230         int iftype[32];
 231 };
 232
 233 struct mxser_board;
 234
 235 struct mxser_port {
 236         struct mxser_board *board;
 237         struct tty_struct *tty;
 238
 239         unsigned long ioaddr;
 240         unsigned long opmode_ioaddr;
 241         int max_baud;
 242
 243         int rx_high_water;
 244         int rx_trigger;         /* Rx fifo trigger level */
 245         int rx_low_water;
 246         int baud_base;          /* max. speed */
 247         long realbaud;
 248         int type;               /* UART type */
 249         int flags;              /* defined in tty.h */
 250         int speed;
 251
 252         int x_char;             /* xon/xoff character */
 253         int IER;                /* Interrupt Enable Register */
 254         int MCR;                /* Modem control register */
 255
 256         unsigned char stop_rx;
 257         unsigned char ldisc_stop_rx;
 258
 259         int custom_divisor;
 260         int close_delay;
 261         unsigned short closing_wait;
 262         unsigned char err_shadow;
 263         unsigned long event;
 264
 265         int count;              /* # of fd on device */
 266         int blocked_open;       /* # of blocked opens */
 267         struct async_icount icount; /* kernel counters for 4 input interrupts */
 268         int timeout;
 269
 270         int read_status_mask;
 271         int ignore_status_mask;
 272         int xmit_fifo_size;
 273         unsigned char *xmit_buf;
 274         int xmit_head;
 275         int xmit_tail;
 276         int xmit_cnt;
 277
 278         struct ktermios normal_termios;
 279
 280         struct mxser_mon mon_data;
 281
 282         spinlock_t slock;
 283         wait_queue_head_t open_wait;
 284         wait_queue_head_t delta_msr_wait;
 285 };
 286
 287 struct mxser_board {
 288         unsigned int idx;
 289         int irq;
 290         const struct mxser_cardinfo *info;
 291         unsigned long vector;
 292         unsigned long vector_mask;
 293
 294         int chip_flag;
 295         int uart_type;
 296
 297         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 298 };
 299
 300 struct mxser_mstatus {
 301         tcflag_t cflag;
 302         int cts;
 303         int dsr;
 304         int ri;
 305         int dcd;
 306 };
 307
 308 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 309
 310 static int mxserBoardCAP[MXSER_BOARDS] = {
 311         0, 0, 0, 0
 312         /*  0x180, 0x280, 0x200, 0x320 */
 313 };
 314
 315 static struct mxser_board mxser_boards[MXSER_BOARDS];
 316 static struct tty_driver *mxvar_sdriver;
 317 static struct mxser_log mxvar_log;
 318 static int mxvar_diagflag;
 319 static unsigned char mxser_msr[MXSER_PORTS + 1];
 320 static struct mxser_mon_ext mon_data_ext;
 321 static int mxser_set_baud_method[MXSER_PORTS + 1];
 322
 323 #ifdef CONFIG_PCI
 324 static int __devinit CheckIsMoxaMust(int io)
 325 {
 326         u8 oldmcr, hwid;
 327         int i;
 328
 329         outb(0, io + UART_LCR);
 330         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 331         oldmcr = inb(io + UART_MCR);
 332         outb(0, io + UART_MCR);
 333         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 334         if ((hwid = inb(io + UART_MCR)) != 0) {
 335                 outb(oldmcr, io + UART_MCR);
 336                 return MOXA_OTHER_UART;
 337         }
 338
 339         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 340         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 341                 if (hwid == Gpci_uart_info[i].type)
 342                         return (int)hwid;
 343         }
 344         return MOXA_OTHER_UART;
 345 }
 346 #endif
 347
 348 static void process_txrx_fifo(struct mxser_port *info)
 349 {
 350         int i;
 351
 352         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 353                 info->rx_trigger = 1;
 354                 info->rx_high_water = 1;
 355                 info->rx_low_water = 1;
 356                 info->xmit_fifo_size = 1;
 357         } else
 358                 for (i = 0; i < UART_INFO_NUM; i++)
 359                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 360                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 361                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 362                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 363                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 364                                 break;
 365                         }
 366 }
 367
 368 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 369 {
 370         unsigned char status = 0;
 371
 372         status = inb(baseaddr + UART_MSR);
 373
 374         mxser_msr[port] &= 0x0F;
 375         mxser_msr[port] |= status;
 376         status = mxser_msr[port];
 377         if (mode)
 378                 mxser_msr[port] = 0;
 379
 380         return status;
 381 }
 382
 383 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 384                 struct mxser_port *port)
 385 {
 386         DECLARE_WAITQUEUE(wait, current);
 387         int retval;
 388         int do_clocal = 0;
 389         unsigned long flags;
 390
 391         /*
 392          * If non-blocking mode is set, or the port is not enabled,
 393          * then make the check up front and then exit.
 394          */
 395         if ((filp->f_flags & O_NONBLOCK) ||
 396                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 397                 port->flags |= ASYNC_NORMAL_ACTIVE;
 398                 return 0;
 399         }
 400
 401         if (tty->termios->c_cflag & CLOCAL)
 402                 do_clocal = 1;
 403
 404         /*
 405          * Block waiting for the carrier detect and the line to become
 406          * free (i.e., not in use by the callout).  While we are in
 407          * this loop, port->count is dropped by one, so that
 408          * mxser_close() knows when to free things.  We restore it upon
 409          * exit, either normal or abnormal.
 410          */
 411         retval = 0;
 412         add_wait_queue(&port->open_wait, &wait);
 413
 414         spin_lock_irqsave(&port->slock, flags);
 415         if (!tty_hung_up_p(filp))
 416                 port->count--;
 417         spin_unlock_irqrestore(&port->slock, flags);
 418         port->blocked_open++;
 419         while (1) {
 420                 spin_lock_irqsave(&port->slock, flags);
 421                 outb(inb(port->ioaddr + UART_MCR) |
 422                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 423                 spin_unlock_irqrestore(&port->slock, flags);
 424                 set_current_state(TASK_INTERRUPTIBLE);
 425                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 426                         if (port->flags & ASYNC_HUP_NOTIFY)
 427                                 retval = -EAGAIN;
 428                         else
 429                                 retval = -ERESTARTSYS;
 430                         break;
 431                 }
 432                 if (!(port->flags & ASYNC_CLOSING) &&
 433                                 (do_clocal ||
 434                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 435                         break;
 436                 if (signal_pending(current)) {
 437                         retval = -ERESTARTSYS;
 438                         break;
 439                 }
 440                 schedule();
 441         }
 442         set_current_state(TASK_RUNNING);
 443         remove_wait_queue(&port->open_wait, &wait);
 444         if (!tty_hung_up_p(filp))
 445                 port->count++;
 446         port->blocked_open--;
 447         if (retval)
 448                 return retval;
 449         port->flags |= ASYNC_NORMAL_ACTIVE;
 450         return 0;
 451 }
 452
 453 static int mxser_set_baud(struct mxser_port *info, long newspd)
 454 {
 455         unsigned int i;
 456         int quot = 0;
 457         unsigned char cval;
 458         int ret = 0;
 459
 460         if (!info->tty || !info->tty->termios)
 461                 return ret;
 462
 463         if (!(info->ioaddr))
 464                 return ret;
 465
 466         if (newspd > info->max_baud)
 467                 return 0;
 468
 469         info->realbaud = newspd;
 470         for (i = 0; i < BAUD_TABLE_NO; i++)
 471                if (newspd == mxvar_baud_table[i])
 472                        break;
 473         if (i == BAUD_TABLE_NO) {
 474                 quot = info->baud_base / info->speed;
 475                 if (info->speed <= 0 || info->speed > info->max_baud)
 476                         quot = 0;
 477         } else {
 478                 if (newspd == 134) {
 479                         quot = (2 * info->baud_base / 269);
 480                 } else if (newspd) {
 481                         quot = info->baud_base / newspd;
 482                         if (quot == 0)
 483                                 quot = 1;
 484                 } else {
 485                         quot = 0;
 486                 }
 487         }
 488
 489         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 490         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 491
 492         if (quot) {
 493                 info->MCR |= UART_MCR_DTR;
 494                 outb(info->MCR, info->ioaddr + UART_MCR);
 495         } else {
 496                 info->MCR &= ~UART_MCR_DTR;
 497                 outb(info->MCR, info->ioaddr + UART_MCR);
 498                 return ret;
 499         }
 500
 501         cval = inb(info->ioaddr + UART_LCR);
 502
 503         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 504
 505         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 506         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 507         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 508
 509         if (i == BAUD_TABLE_NO) {
 510                 quot = info->baud_base % info->speed;
 511                 quot *= 8;
 512                 if ((quot % info->speed) > (info->speed / 2)) {
 513                         quot /= info->speed;
 514                         quot++;
 515                 } else {
 516                         quot /= info->speed;
 517                 }
 518                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 519         } else
 520                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 521
 522         return ret;
 523 }
 524
 525 /*
 526  * This routine is called to set the UART divisor registers to match
 527  * the specified baud rate for a serial port.
 528  */
 529 static int mxser_change_speed(struct mxser_port *info,
 530                 struct ktermios *old_termios)
 531 {
 532         unsigned cflag, cval, fcr;
 533         int ret = 0;
 534         unsigned char status;
 535         long baud;
 536
 537         if (!info->tty || !info->tty->termios)
 538                 return ret;
 539         cflag = info->tty->termios->c_cflag;
 540         if (!(info->ioaddr))
 541                 return ret;
 542
 543         if (mxser_set_baud_method[info->tty->index] == 0) {
 544                 if ((cflag & CBAUD) == B_SPEC)
 545                         baud = info->speed;
 546                 else
 547                         baud = tty_get_baud_rate(info->tty);
 548                 mxser_set_baud(info, baud);
 549         }
 550
 551         /* byte size and parity */
 552         switch (cflag & CSIZE) {
 553         case CS5:
 554                 cval = 0x00;
 555                 break;
 556         case CS6:
 557                 cval = 0x01;
 558                 break;
 559         case CS7:
 560                 cval = 0x02;
 561                 break;
 562         case CS8:
 563                 cval = 0x03;
 564                 break;
 565         default:
 566                 cval = 0x00;
 567                 break;          /* too keep GCC shut... */
 568         }
 569         if (cflag & CSTOPB)
 570                 cval |= 0x04;
 571         if (cflag & PARENB)
 572                 cval |= UART_LCR_PARITY;
 573         if (!(cflag & PARODD))
 574                 cval |= UART_LCR_EPAR;
 575         if (cflag & CMSPAR)
 576                 cval |= UART_LCR_SPAR;
 577
 578         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 579                 if (info->board->chip_flag) {
 580                         fcr = UART_FCR_ENABLE_FIFO;
 581                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 582                         SET_MOXA_MUST_FIFO_VALUE(info);
 583                 } else
 584                         fcr = 0;
 585         } else {
 586                 fcr = UART_FCR_ENABLE_FIFO;
 587                 if (info->board->chip_flag) {
 588                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 589                         SET_MOXA_MUST_FIFO_VALUE(info);
 590                 } else {
 591                         switch (info->rx_trigger) {
 592                         case 1:
 593                                 fcr |= UART_FCR_TRIGGER_1;
 594                                 break;
 595                         case 4:
 596                                 fcr |= UART_FCR_TRIGGER_4;
 597                                 break;
 598                         case 8:
 599                                 fcr |= UART_FCR_TRIGGER_8;
 600                                 break;
 601                         default:
 602                                 fcr |= UART_FCR_TRIGGER_14;
 603                                 break;
 604                         }
 605                 }
 606         }
 607
 608         /* CTS flow control flag and modem status interrupts */
 609         info->IER &= ~UART_IER_MSI;
 610         info->MCR &= ~UART_MCR_AFE;
 611         if (cflag & CRTSCTS) {
 612                 info->flags |= ASYNC_CTS_FLOW;
 613                 info->IER |= UART_IER_MSI;
 614                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 615                         info->MCR |= UART_MCR_AFE;
 616                 } else {
 617                         status = inb(info->ioaddr + UART_MSR);
 618                         if (info->tty->hw_stopped) {
 619                                 if (status & UART_MSR_CTS) {
 620                                         info->tty->hw_stopped = 0;
 621                                         if (info->type != PORT_16550A &&
 622                                                         !info->board->chip_flag) {
 623                                                 outb(info->IER & ~UART_IER_THRI,
 624                                                         info->ioaddr +
 625                                                         UART_IER);
 626                                                 info->IER |= UART_IER_THRI;
 627                                                 outb(info->IER, info->ioaddr +
 628                                                                 UART_IER);
 629                                         }
 630                                         tty_wakeup(info->tty);
 631                                 }
 632                         } else {
 633                                 if (!(status & UART_MSR_CTS)) {
 634                                         info->tty->hw_stopped = 1;
 635                                         if ((info->type != PORT_16550A) &&
 636                                                         (!info->board->chip_flag)) {
 637                                                 info->IER &= ~UART_IER_THRI;
 638                                                 outb(info->IER, info->ioaddr +
 639                                                                 UART_IER);
 640                                         }
 641                                 }
 642                         }
 643                 }
 644         } else {
 645                 info->flags &= ~ASYNC_CTS_FLOW;
 646         }
 647         outb(info->MCR, info->ioaddr + UART_MCR);
 648         if (cflag & CLOCAL) {
 649                 info->flags &= ~ASYNC_CHECK_CD;
 650         } else {
 651                 info->flags |= ASYNC_CHECK_CD;
 652                 info->IER |= UART_IER_MSI;
 653         }
 654         outb(info->IER, info->ioaddr + UART_IER);
 655
 656         /*
 657          * Set up parity check flag
 658          */
 659         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 660         if (I_INPCK(info->tty))
 661                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 662         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 663                 info->read_status_mask |= UART_LSR_BI;
 664
 665         info->ignore_status_mask = 0;
 666
 667         if (I_IGNBRK(info->tty)) {
 668                 info->ignore_status_mask |= UART_LSR_BI;
 669                 info->read_status_mask |= UART_LSR_BI;
 670                 /*
 671                  * If we're ignore parity and break indicators, ignore
 672                  * overruns too.  (For real raw support).
 673                  */
 674                 if (I_IGNPAR(info->tty)) {
 675                         info->ignore_status_mask |=
 676                                                 UART_LSR_OE |
 677                                                 UART_LSR_PE |
 678                                                 UART_LSR_FE;
 679                         info->read_status_mask |=
 680                                                 UART_LSR_OE |
 681                                                 UART_LSR_PE |
 682                                                 UART_LSR_FE;
 683                 }
 684         }
 685         if (info->board->chip_flag) {
 686                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 687                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 688                 if (I_IXON(info->tty)) {
 689                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 690                 } else {
 691                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 692                 }
 693                 if (I_IXOFF(info->tty)) {
 694                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 695                 } else {
 696                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 697                 }
 698         }
 699
 700
 701         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 702         outb(cval, info->ioaddr + UART_LCR);
 703
 704         return ret;
 705 }
 706
 707 static void mxser_check_modem_status(struct mxser_port *port, int status)
 708 {
 709         /* update input line counters */
 710         if (status & UART_MSR_TERI)
 711                 port->icount.rng++;
 712         if (status & UART_MSR_DDSR)
 713                 port->icount.dsr++;
 714         if (status & UART_MSR_DDCD)
 715                 port->icount.dcd++;
 716         if (status & UART_MSR_DCTS)
 717                 port->icount.cts++;
 718         port->mon_data.modem_status = status;
 719         wake_up_interruptible(&port->delta_msr_wait);
 720
 721         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 722                 if (status & UART_MSR_DCD)
 723                         wake_up_interruptible(&port->open_wait);
 724         }
 725
 726         if (port->flags & ASYNC_CTS_FLOW) {
 727                 if (port->tty->hw_stopped) {
 728                         if (status & UART_MSR_CTS) {
 729                                 port->tty->hw_stopped = 0;
 730
 731                                 if ((port->type != PORT_16550A) &&
 732                                                 (!port->board->chip_flag)) {
 733                                         outb(port->IER & ~UART_IER_THRI,
 734                                                 port->ioaddr + UART_IER);
 735                                         port->IER |= UART_IER_THRI;
 736                                         outb(port->IER, port->ioaddr +
 737                                                         UART_IER);
 738                                 }
 739                                 tty_wakeup(port->tty);
 740                         }
 741                 } else {
 742                         if (!(status & UART_MSR_CTS)) {
 743                                 port->tty->hw_stopped = 1;
 744                                 if (port->type != PORT_16550A &&
 745                                                 !port->board->chip_flag) {
 746                                         port->IER &= ~UART_IER_THRI;
 747                                         outb(port->IER, port->ioaddr +
 748                                                         UART_IER);
 749                                 }
 750                         }
 751                 }
 752         }
 753 }
 754
 755 static int mxser_startup(struct mxser_port *info)
 756 {
 757         unsigned long page;
 758         unsigned long flags;
 759
 760         page = __get_free_page(GFP_KERNEL);
 761         if (!page)
 762                 return -ENOMEM;
 763
 764         spin_lock_irqsave(&info->slock, flags);
 765
 766         if (info->flags & ASYNC_INITIALIZED) {
 767                 free_page(page);
 768                 spin_unlock_irqrestore(&info->slock, flags);
 769                 return 0;
 770         }
 771
 772         if (!info->ioaddr || !info->type) {
 773                 if (info->tty)
 774                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 775                 free_page(page);
 776                 spin_unlock_irqrestore(&info->slock, flags);
 777                 return 0;
 778         }
 779         if (info->xmit_buf)
 780                 free_page(page);
 781         else
 782                 info->xmit_buf = (unsigned char *) page;
 783
 784         /*
 785          * Clear the FIFO buffers and disable them
 786          * (they will be reenabled in mxser_change_speed())
 787          */
 788         if (info->board->chip_flag)
 789                 outb((UART_FCR_CLEAR_RCVR |
 790                         UART_FCR_CLEAR_XMIT |
 791                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 792         else
 793                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 794                         info->ioaddr + UART_FCR);
 795
 796         /*
 797          * At this point there's no way the LSR could still be 0xFF;
 798          * if it is, then bail out, because there's likely no UART
 799          * here.
 800          */
 801         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 802                 spin_unlock_irqrestore(&info->slock, flags);
 803                 if (capable(CAP_SYS_ADMIN)) {
 804                         if (info->tty)
 805                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 806                         return 0;
 807                 } else
 808                         return -ENODEV;
 809         }
 810
 811         /*
 812          * Clear the interrupt registers.
 813          */
 814         (void) inb(info->ioaddr + UART_LSR);
 815         (void) inb(info->ioaddr + UART_RX);
 816         (void) inb(info->ioaddr + UART_IIR);
 817         (void) inb(info->ioaddr + UART_MSR);
 818
 819         /*
 820          * Now, initialize the UART
 821          */
 822         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 823         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 824         outb(info->MCR, info->ioaddr + UART_MCR);
 825
 826         /*
 827          * Finally, enable interrupts
 828          */
 829         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 830
 831         if (info->board->chip_flag)
 832                 info->IER |= MOXA_MUST_IER_EGDAI;
 833         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 834
 835         /*
 836          * And clear the interrupt registers again for luck.
 837          */
 838         (void) inb(info->ioaddr + UART_LSR);
 839         (void) inb(info->ioaddr + UART_RX);
 840         (void) inb(info->ioaddr + UART_IIR);
 841         (void) inb(info->ioaddr + UART_MSR);
 842
 843         if (info->tty)
 844                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 845         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 846
 847         /*
 848          * and set the speed of the serial port
 849          */
 850         mxser_change_speed(info, NULL);
 851         info->flags |= ASYNC_INITIALIZED;
 852         spin_unlock_irqrestore(&info->slock, flags);
 853
 854         return 0;
 855 }
 856
 857 /*
 858  * This routine will shutdown a serial port; interrupts maybe disabled, and
 859  * DTR is dropped if the hangup on close termio flag is on.
 860  */
 861 static void mxser_shutdown(struct mxser_port *info)
 862 {
 863         unsigned long flags;
 864
 865         if (!(info->flags & ASYNC_INITIALIZED))
 866                 return;
 867
 868         spin_lock_irqsave(&info->slock, flags);
 869
 870         /*
 871          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 872          * here so the queue might never be waken up
 873          */
 874         wake_up_interruptible(&info->delta_msr_wait);
 875
 876         /*
 877          * Free the IRQ, if necessary
 878          */
 879         if (info->xmit_buf) {
 880                 free_page((unsigned long) info->xmit_buf);
 881                 info->xmit_buf = NULL;
 882         }
 883
 884         info->IER = 0;
 885         outb(0x00, info->ioaddr + UART_IER);
 886
 887         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 888                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 889         outb(info->MCR, info->ioaddr + UART_MCR);
 890
 891         /* clear Rx/Tx FIFO's */
 892         if (info->board->chip_flag)
 893                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 894                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 895                                 info->ioaddr + UART_FCR);
 896         else
 897                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 898                         info->ioaddr + UART_FCR);
 899
 900         /* read data port to reset things */
 901         (void) inb(info->ioaddr + UART_RX);
 902
 903         if (info->tty)
 904                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 905
 906         info->flags &= ~ASYNC_INITIALIZED;
 907
 908         if (info->board->chip_flag)
 909                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 910
 911         spin_unlock_irqrestore(&info->slock, flags);
 912 }
 913
 914 /*
 915  * This routine is called whenever a serial port is opened.  It
 916  * enables interrupts for a serial port, linking in its async structure into
 917  * the IRQ chain.   It also performs the serial-specific
 918  * initialization for the tty structure.
 919  */
 920 static int mxser_open(struct tty_struct *tty, struct file *filp)
 921 {
 922         struct mxser_port *info;
 923         unsigned long flags;
 924         int retval, line;
 925
 926         line = tty->index;
 927         if (line == MXSER_PORTS)
 928                 return 0;
 929         if (line < 0 || line > MXSER_PORTS)
 930                 return -ENODEV;
 931         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 932         if (!info->ioaddr)
 933                 return -ENODEV;
 934
 935         tty->driver_data = info;
 936         info->tty = tty;
 937         /*
 938          * Start up serial port
 939          */
 940         spin_lock_irqsave(&info->slock, flags);
 941         info->count++;
 942         spin_unlock_irqrestore(&info->slock, flags);
 943         retval = mxser_startup(info);
 944         if (retval)
 945                 return retval;
 946
 947         retval = mxser_block_til_ready(tty, filp, info);
 948         if (retval)
 949                 return retval;
 950
 951         /* unmark here for very high baud rate (ex. 921600 bps) used */
 952         tty->low_latency = 1;
 953         return 0;
 954 }
 955
 956 /*
 957  * This routine is called when the serial port gets closed.  First, we
 958  * wait for the last remaining data to be sent.  Then, we unlink its
 959  * async structure from the interrupt chain if necessary, and we free
 960  * that IRQ if nothing is left in the chain.
 961  */
 962 static void mxser_close(struct tty_struct *tty, struct file *filp)
 963 {
 964         struct mxser_port *info = tty->driver_data;
 965
 966         unsigned long timeout;
 967         unsigned long flags;
 968
 969         if (tty->index == MXSER_PORTS)
 970                 return;
 971         if (!info)
 972                 return;
 973
 974         spin_lock_irqsave(&info->slock, flags);
 975
 976         if (tty_hung_up_p(filp)) {
 977                 spin_unlock_irqrestore(&info->slock, flags);
 978                 return;
 979         }
 980         if ((tty->count == 1) && (info->count != 1)) {
 981                 /*
 982                  * Uh, oh.  tty->count is 1, which means that the tty
 983                  * structure will be freed.  Info->count should always
 984                  * be one in these conditions.  If it's greater than
 985                  * one, we've got real problems, since it means the
 986                  * serial port won't be shutdown.
 987                  */
 988                 printk(KERN_ERR "mxser_close: bad serial port count; "
 989                         "tty->count is 1, info->count is %d\n", info->count);
 990                 info->count = 1;
 991         }
 992         if (--info->count < 0) {
 993                 printk(KERN_ERR "mxser_close: bad serial port count for "
 994                         "ttys%d: %d\n", tty->index, info->count);
 995                 info->count = 0;
 996         }
 997         if (info->count) {
 998                 spin_unlock_irqrestore(&info->slock, flags);
 999                 return;
1000         }
1001         info->flags |= ASYNC_CLOSING;
1002         spin_unlock_irqrestore(&info->slock, flags);
1003         /*
1004          * Save the termios structure, since this port may have
1005          * separate termios for callout and dialin.
1006          */
1007         if (info->flags & ASYNC_NORMAL_ACTIVE)
1008                 info->normal_termios = *tty->termios;
1009         /*
1010          * Now we wait for the transmit buffer to clear; and we notify
1011          * the line discipline to only process XON/XOFF characters.
1012          */
1013         tty->closing = 1;
1014         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1015                 tty_wait_until_sent(tty, info->closing_wait);
1016         /*
1017          * At this point we stop accepting input.  To do this, we
1018          * disable the receive line status interrupts, and tell the
1019          * interrupt driver to stop checking the data ready bit in the
1020          * line status register.
1021          */
1022         info->IER &= ~UART_IER_RLSI;
1023         if (info->board->chip_flag)
1024                 info->IER &= ~MOXA_MUST_RECV_ISR;
1025
1026         if (info->flags & ASYNC_INITIALIZED) {
1027                 outb(info->IER, info->ioaddr + UART_IER);
1028                 /*
1029                  * Before we drop DTR, make sure the UART transmitter
1030                  * has completely drained; this is especially
1031                  * important if there is a transmit FIFO!
1032                  */
1033                 timeout = jiffies + HZ;
1034                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1035                         schedule_timeout_interruptible(5);
1036                         if (time_after(jiffies, timeout))
1037                                 break;
1038                 }
1039         }
1040         mxser_shutdown(info);
1041
1042         if (tty->driver->flush_buffer)
1043                 tty->driver->flush_buffer(tty);
1044
1045         tty_ldisc_flush(tty);
1046
1047         tty->closing = 0;
1048         info->event = 0;
1049         info->tty = NULL;
1050         if (info->blocked_open) {
1051                 if (info->close_delay)
1052                         schedule_timeout_interruptible(info->close_delay);
1053                 wake_up_interruptible(&info->open_wait);
1054         }
1055
1056         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1057 }
1058
1059 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1060 {
1061         int c, total = 0;
1062         struct mxser_port *info = tty->driver_data;
1063         unsigned long flags;
1064
1065         if (!info->xmit_buf)
1066                 return 0;
1067
1068         while (1) {
1069                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1070                                           SERIAL_XMIT_SIZE - info->xmit_head));
1071                 if (c <= 0)
1072                         break;
1073
1074                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1075                 spin_lock_irqsave(&info->slock, flags);
1076                 info->xmit_head = (info->xmit_head + c) &
1077                                   (SERIAL_XMIT_SIZE - 1);
1078                 info->xmit_cnt += c;
1079                 spin_unlock_irqrestore(&info->slock, flags);
1080
1081                 buf += c;
1082                 count -= c;
1083                 total += c;
1084         }
1085
1086         if (info->xmit_cnt && !tty->stopped) {
1087                 if (!tty->hw_stopped ||
1088                                 (info->type == PORT_16550A) ||
1089                                 (info->board->chip_flag)) {
1090                         spin_lock_irqsave(&info->slock, flags);
1091                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1092                                         UART_IER);
1093                         info->IER |= UART_IER_THRI;
1094                         outb(info->IER, info->ioaddr + UART_IER);
1095                         spin_unlock_irqrestore(&info->slock, flags);
1096                 }
1097         }
1098         return total;
1099 }
1100
1101 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1102 {
1103         struct mxser_port *info = tty->driver_data;
1104         unsigned long flags;
1105
1106         if (!info->xmit_buf)
1107                 return;
1108
1109         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1110                 return;
1111
1112         spin_lock_irqsave(&info->slock, flags);
1113         info->xmit_buf[info->xmit_head++] = ch;
1114         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1115         info->xmit_cnt++;
1116         spin_unlock_irqrestore(&info->slock, flags);
1117         if (!tty->stopped) {
1118                 if (!tty->hw_stopped ||
1119                                 (info->type == PORT_16550A) ||
1120                                 info->board->chip_flag) {
1121                         spin_lock_irqsave(&info->slock, flags);
1122                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1123                         info->IER |= UART_IER_THRI;
1124                         outb(info->IER, info->ioaddr + UART_IER);
1125                         spin_unlock_irqrestore(&info->slock, flags);
1126                 }
1127         }
1128 }
1129
1130
1131 static void mxser_flush_chars(struct tty_struct *tty)
1132 {
1133         struct mxser_port *info = tty->driver_data;
1134         unsigned long flags;
1135
1136         if (info->xmit_cnt <= 0 ||
1137                         tty->stopped ||
1138                         !info->xmit_buf ||
1139                         (tty->hw_stopped &&
1140                          (info->type != PORT_16550A) &&
1141                          (!info->board->chip_flag)
1142                         ))
1143                 return;
1144
1145         spin_lock_irqsave(&info->slock, flags);
1146
1147         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1148         info->IER |= UART_IER_THRI;
1149         outb(info->IER, info->ioaddr + UART_IER);
1150
1151         spin_unlock_irqrestore(&info->slock, flags);
1152 }
1153
1154 static int mxser_write_room(struct tty_struct *tty)
1155 {
1156         struct mxser_port *info = tty->driver_data;
1157         int ret;
1158
1159         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1160         if (ret < 0)
1161                 ret = 0;
1162         return ret;
1163 }
1164
1165 static int mxser_chars_in_buffer(struct tty_struct *tty)
1166 {
1167         struct mxser_port *info = tty->driver_data;
1168         return info->xmit_cnt;
1169 }
1170
1171 static void mxser_flush_buffer(struct tty_struct *tty)
1172 {
1173         struct mxser_port *info = tty->driver_data;
1174         char fcr;
1175         unsigned long flags;
1176
1177
1178         spin_lock_irqsave(&info->slock, flags);
1179         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1180
1181         fcr = inb(info->ioaddr + UART_FCR);
1182         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1183                 info->ioaddr + UART_FCR);
1184         outb(fcr, info->ioaddr + UART_FCR);
1185
1186         spin_unlock_irqrestore(&info->slock, flags);
1187
1188         tty_wakeup(tty);
1189 }
1190
1191 /*
1192  * ------------------------------------------------------------
1193  * friends of mxser_ioctl()
1194  * ------------------------------------------------------------
1195  */
1196 static int mxser_get_serial_info(struct mxser_port *info,
1197                 struct serial_struct __user *retinfo)
1198 {
1199         struct serial_struct tmp;
1200
1201         if (!retinfo)
1202                 return -EFAULT;
1203         memset(&tmp, 0, sizeof(tmp));
1204         tmp.type = info->type;
1205         tmp.line = info->tty->index;
1206         tmp.port = info->ioaddr;
1207         tmp.irq = info->board->irq;
1208         tmp.flags = info->flags;
1209         tmp.baud_base = info->baud_base;
1210         tmp.close_delay = info->close_delay;
1211         tmp.closing_wait = info->closing_wait;
1212         tmp.custom_divisor = info->custom_divisor;
1213         tmp.hub6 = 0;
1214         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1215                 return -EFAULT;
1216         return 0;
1217 }
1218
1219 static int mxser_set_serial_info(struct mxser_port *info,
1220                 struct serial_struct __user *new_info)
1221 {
1222         struct serial_struct new_serial;
1223         unsigned long sl_flags;
1224         unsigned int flags;
1225         int retval = 0;
1226
1227         if (!new_info || !info->ioaddr)
1228                 return -EFAULT;
1229         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1230                 return -EFAULT;
1231
1232         if ((new_serial.irq != info->board->irq) ||
1233                         (new_serial.port != info->ioaddr) ||
1234                         (new_serial.custom_divisor != info->custom_divisor) ||
1235                         (new_serial.baud_base != info->baud_base))
1236                 return -EPERM;
1237
1238         flags = info->flags & ASYNC_SPD_MASK;
1239
1240         if (!capable(CAP_SYS_ADMIN)) {
1241                 if ((new_serial.baud_base != info->baud_base) ||
1242                                 (new_serial.close_delay != info->close_delay) ||
1243                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1244                         return -EPERM;
1245                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1246                                 (new_serial.flags & ASYNC_USR_MASK));
1247         } else {
1248                 /*
1249                  * OK, past this point, all the error checking has been done.
1250                  * At this point, we start making changes.....
1251                  */
1252                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1253                                 (new_serial.flags & ASYNC_FLAGS));
1254                 info->close_delay = new_serial.close_delay * HZ / 100;
1255                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1256                 info->tty->low_latency =
1257                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1258                 info->tty->low_latency = 0;
1259         }
1260
1261         info->type = new_serial.type;
1262
1263         process_txrx_fifo(info);
1264
1265         if (info->flags & ASYNC_INITIALIZED) {
1266                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1267                         spin_lock_irqsave(&info->slock, sl_flags);
1268                         mxser_change_speed(info, NULL);
1269                         spin_unlock_irqrestore(&info->slock, sl_flags);
1270                 }
1271         } else
1272                 retval = mxser_startup(info);
1273
1274         return retval;
1275 }
1276
1277 /*
1278  * mxser_get_lsr_info - get line status register info
1279  *
1280  * Purpose: Let user call ioctl() to get info when the UART physically
1281  *          is emptied.  On bus types like RS485, the transmitter must
1282  *          release the bus after transmitting. This must be done when
1283  *          the transmit shift register is empty, not be done when the
1284  *          transmit holding register is empty.  This functionality
1285  *          allows an RS485 driver to be written in user space.
1286  */
1287 static int mxser_get_lsr_info(struct mxser_port *info,
1288                 unsigned int __user *value)
1289 {
1290         unsigned char status;
1291         unsigned int result;
1292         unsigned long flags;
1293
1294         spin_lock_irqsave(&info->slock, flags);
1295         status = inb(info->ioaddr + UART_LSR);
1296         spin_unlock_irqrestore(&info->slock, flags);
1297         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1298         return put_user(result, value);
1299 }
1300
1301 /*
1302  * This routine sends a break character out the serial port.
1303  */
1304 static void mxser_send_break(struct mxser_port *info, int duration)
1305 {
1306         unsigned long flags;
1307
1308         if (!info->ioaddr)
1309                 return;
1310         set_current_state(TASK_INTERRUPTIBLE);
1311         spin_lock_irqsave(&info->slock, flags);
1312         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1313                 info->ioaddr + UART_LCR);
1314         spin_unlock_irqrestore(&info->slock, flags);
1315         schedule_timeout(duration);
1316         spin_lock_irqsave(&info->slock, flags);
1317         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1318                 info->ioaddr + UART_LCR);
1319         spin_unlock_irqrestore(&info->slock, flags);
1320 }
1321
1322 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1323 {
1324         struct mxser_port *info = tty->driver_data;
1325         unsigned char control, status;
1326         unsigned long flags;
1327
1328
1329         if (tty->index == MXSER_PORTS)
1330                 return -ENOIOCTLCMD;
1331         if (test_bit(TTY_IO_ERROR, &tty->flags))
1332                 return -EIO;
1333
1334         control = info->MCR;
1335
1336         spin_lock_irqsave(&info->slock, flags);
1337         status = inb(info->ioaddr + UART_MSR);
1338         if (status & UART_MSR_ANY_DELTA)
1339                 mxser_check_modem_status(info, status);
1340         spin_unlock_irqrestore(&info->slock, flags);
1341         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1342                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1343                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1344                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1345                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1346                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1347 }
1348
1349 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1350                 unsigned int set, unsigned int clear)
1351 {
1352         struct mxser_port *info = tty->driver_data;
1353         unsigned long flags;
1354
1355
1356         if (tty->index == MXSER_PORTS)
1357                 return -ENOIOCTLCMD;
1358         if (test_bit(TTY_IO_ERROR, &tty->flags))
1359                 return -EIO;
1360
1361         spin_lock_irqsave(&info->slock, flags);
1362
1363         if (set & TIOCM_RTS)
1364                 info->MCR |= UART_MCR_RTS;
1365         if (set & TIOCM_DTR)
1366                 info->MCR |= UART_MCR_DTR;
1367
1368         if (clear & TIOCM_RTS)
1369                 info->MCR &= ~UART_MCR_RTS;
1370         if (clear & TIOCM_DTR)
1371                 info->MCR &= ~UART_MCR_DTR;
1372
1373         outb(info->MCR, info->ioaddr + UART_MCR);
1374         spin_unlock_irqrestore(&info->slock, flags);
1375         return 0;
1376 }
1377
1378 static int __init mxser_program_mode(int port)
1379 {
1380         int id, i, j, n;
1381
1382         outb(0, port);
1383         outb(0, port);
1384         outb(0, port);
1385         (void)inb(port);
1386         (void)inb(port);
1387         outb(0, port);
1388         (void)inb(port);
1389
1390         id = inb(port + 1) & 0x1F;
1391         if ((id != C168_ASIC_ID) &&
1392                         (id != C104_ASIC_ID) &&
1393                         (id != C102_ASIC_ID) &&
1394                         (id != CI132_ASIC_ID) &&
1395                         (id != CI134_ASIC_ID) &&
1396                         (id != CI104J_ASIC_ID))
1397                 return -1;
1398         for (i = 0, j = 0; i < 4; i++) {
1399                 n = inb(port + 2);
1400                 if (n == 'M') {
1401                         j = 1;
1402                 } else if ((j == 1) && (n == 1)) {
1403                         j = 2;
1404                         break;
1405                 } else
1406                         j = 0;
1407         }
1408         if (j != 2)
1409                 id = -2;
1410         return id;
1411 }
1412
1413 static void __init mxser_normal_mode(int port)
1414 {
1415         int i, n;
1416
1417         outb(0xA5, port + 1);
1418         outb(0x80, port + 3);
1419         outb(12, port + 0);     /* 9600 bps */
1420         outb(0, port + 1);
1421         outb(0x03, port + 3);   /* 8 data bits */
1422         outb(0x13, port + 4);   /* loop back mode */
1423         for (i = 0; i < 16; i++) {
1424                 n = inb(port + 5);
1425                 if ((n & 0x61) == 0x60)
1426                         break;
1427                 if ((n & 1) == 1)
1428                         (void)inb(port);
1429         }
1430         outb(0x00, port + 4);
1431 }
1432
1433 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1434 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1435 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1436 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1437 #define EN_CCMD         0x000   /* Chip's command register     */
1438 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1439 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1440 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1441 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1442 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1443 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1444 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1445 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1446 static int __init mxser_read_register(int port, unsigned short *regs)
1447 {
1448         int i, k, value, id;
1449         unsigned int j;
1450
1451         id = mxser_program_mode(port);
1452         if (id < 0)
1453                 return id;
1454         for (i = 0; i < 14; i++) {
1455                 k = (i & 0x3F) | 0x180;
1456                 for (j = 0x100; j > 0; j >>= 1) {
1457                         outb(CHIP_CS, port);
1458                         if (k & j) {
1459                                 outb(CHIP_CS | CHIP_DO, port);
1460                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1461                         } else {
1462                                 outb(CHIP_CS, port);
1463                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1464                         }
1465                 }
1466                 (void)inb(port);
1467                 value = 0;
1468                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1469                         outb(CHIP_CS, port);
1470                         outb(CHIP_CS | CHIP_SK, port);
1471                         if (inb(port) & CHIP_DI)
1472                                 value |= j;
1473                 }
1474                 regs[i] = value;
1475                 outb(0, port);
1476         }
1477         mxser_normal_mode(port);
1478         return id;
1479 }
1480
1481 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 {
1483         struct mxser_port *port;
1484         int result, status;
1485         unsigned int i, j;
1486
1487         switch (cmd) {
1488         case MOXA_GET_CONF:
1489 /*              if (copy_to_user(argp, mxsercfg,
1490                                 sizeof(struct mxser_hwconf) * 4))
1491                         return -EFAULT;
1492                 return 0;*/
1493                 return -ENXIO;
1494         case MOXA_GET_MAJOR:
1495                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1496                         return -EFAULT;
1497                 return 0;
1498
1499         case MOXA_GET_CUMAJOR:
1500                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1501                         return -EFAULT;
1502                 return 0;
1503
1504         case MOXA_CHKPORTENABLE:
1505                 result = 0;
1506
1507                 for (i = 0; i < MXSER_BOARDS; i++)
1508                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1509                                 if (mxser_boards[i].ports[j].ioaddr)
1510                                         result |= (1 << i);
1511
1512                 return put_user(result, (unsigned long __user *)argp);
1513         case MOXA_GETDATACOUNT:
1514                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1515                         return -EFAULT;
1516                 return 0;
1517         case MOXA_GETMSTATUS:
1518                 for (i = 0; i < MXSER_BOARDS; i++)
1519                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1520                                 port = &mxser_boards[i].ports[j];
1521
1522                                 GMStatus[i].ri = 0;
1523                                 if (!port->ioaddr) {
1524                                         GMStatus[i].dcd = 0;
1525                                         GMStatus[i].dsr = 0;
1526                                         GMStatus[i].cts = 0;
1527                                         continue;
1528                                 }
1529
1530                                 if (!port->tty || !port->tty->termios)
1531                                         GMStatus[i].cflag =
1532                                                 port->normal_termios.c_cflag;
1533                                 else
1534                                         GMStatus[i].cflag =
1535                                                 port->tty->termios->c_cflag;
1536
1537                                 status = inb(port->ioaddr + UART_MSR);
1538                                 if (status & 0x80 /*UART_MSR_DCD */ )
1539                                         GMStatus[i].dcd = 1;
1540                                 else
1541                                         GMStatus[i].dcd = 0;
1542
1543                                 if (status & 0x20 /*UART_MSR_DSR */ )
1544                                         GMStatus[i].dsr = 1;
1545                                 else
1546                                         GMStatus[i].dsr = 0;
1547
1548
1549                                 if (status & 0x10 /*UART_MSR_CTS */ )
1550                                         GMStatus[i].cts = 1;
1551                                 else
1552                                         GMStatus[i].cts = 0;
1553                         }
1554                 if (copy_to_user(argp, GMStatus,
1555                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1556                         return -EFAULT;
1557                 return 0;
1558         case MOXA_ASPP_MON_EXT: {
1559                 int p, shiftbit;
1560                 unsigned long opmode;
1561                 unsigned cflag, iflag;
1562
1563                 for (i = 0; i < MXSER_BOARDS; i++)
1564                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1565                                 port = &mxser_boards[i].ports[j];
1566                                 if (!port->ioaddr)
1567                                         continue;
1568
1569                                 status = mxser_get_msr(port->ioaddr, 0, i);
1570
1571                                 if (status & UART_MSR_TERI)
1572                                         port->icount.rng++;
1573                                 if (status & UART_MSR_DDSR)
1574                                         port->icount.dsr++;
1575                                 if (status & UART_MSR_DDCD)
1576                                         port->icount.dcd++;
1577                                 if (status & UART_MSR_DCTS)
1578                                         port->icount.cts++;
1579
1580                                 port->mon_data.modem_status = status;
1581                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1582                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1583                                 mon_data_ext.up_rxcnt[i] =
1584                                         port->mon_data.up_rxcnt;
1585                                 mon_data_ext.up_txcnt[i] =
1586                                         port->mon_data.up_txcnt;
1587                                 mon_data_ext.modem_status[i] =
1588                                         port->mon_data.modem_status;
1589                                 mon_data_ext.baudrate[i] = port->realbaud;
1590
1591                                 if (!port->tty || !port->tty->termios) {
1592                                         cflag = port->normal_termios.c_cflag;
1593                                         iflag = port->normal_termios.c_iflag;
1594                                 } else {
1595                                         cflag = port->tty->termios->c_cflag;
1596                                         iflag = port->tty->termios->c_iflag;
1597                                 }
1598
1599                                 mon_data_ext.databits[i] = cflag & CSIZE;
1600
1601                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1602
1603                                 mon_data_ext.parity[i] =
1604                                         cflag & (PARENB | PARODD | CMSPAR);
1605
1606                                 mon_data_ext.flowctrl[i] = 0x00;
1607
1608                                 if (cflag & CRTSCTS)
1609                                         mon_data_ext.flowctrl[i] |= 0x03;
1610
1611                                 if (iflag & (IXON | IXOFF))
1612                                         mon_data_ext.flowctrl[i] |= 0x0C;
1613
1614                                 if (port->type == PORT_16550A)
1615                                         mon_data_ext.fifo[i] = 1;
1616                                 else
1617                                         mon_data_ext.fifo[i] = 0;
1618
1619                                 p = i % 4;
1620                                 shiftbit = p * 2;
1621                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1622                                 opmode &= OP_MODE_MASK;
1623
1624                                 mon_data_ext.iftype[i] = opmode;
1625
1626                         }
1627                         if (copy_to_user(argp, &mon_data_ext,
1628                                                 sizeof(mon_data_ext)))
1629                                 return -EFAULT;
1630
1631                         return 0;
1632
1633         } default:
1634                 return -ENOIOCTLCMD;
1635         }
1636         return 0;
1637 }
1638
1639 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1640                 unsigned int cmd, unsigned long arg)
1641 {
1642         struct mxser_port *info = tty->driver_data;
1643         struct async_icount cprev, cnow;        /* kernel counter temps */
1644         struct serial_icounter_struct __user *p_cuser;
1645         unsigned long templ;
1646         unsigned long flags;
1647         unsigned int i;
1648         void __user *argp = (void __user *)arg;
1649         int retval;
1650
1651         if (tty->index == MXSER_PORTS)
1652                 return mxser_ioctl_special(cmd, argp);
1653
1654         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1655                 int p;
1656                 unsigned long opmode;
1657                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1658                 int shiftbit;
1659                 unsigned char val, mask;
1660
1661                 p = tty->index % 4;
1662                 if (cmd == MOXA_SET_OP_MODE) {
1663                         if (get_user(opmode, (int __user *) argp))
1664                                 return -EFAULT;
1665                         if (opmode != RS232_MODE &&
1666                                         opmode != RS485_2WIRE_MODE &&
1667                                         opmode != RS422_MODE &&
1668                                         opmode != RS485_4WIRE_MODE)
1669                                 return -EFAULT;
1670                         mask = ModeMask[p];
1671                         shiftbit = p * 2;
1672                         val = inb(info->opmode_ioaddr);
1673                         val &= mask;
1674                         val |= (opmode << shiftbit);
1675                         outb(val, info->opmode_ioaddr);
1676                 } else {
1677                         shiftbit = p * 2;
1678                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1679                         opmode &= OP_MODE_MASK;
1680                         if (copy_to_user(argp, &opmode, sizeof(int)))
1681                                 return -EFAULT;
1682                 }
1683                 return 0;
1684         }
1685
1686         if (cmd == MOXA_SET_SPECIAL_BAUD_RATE) {
1687                 int speed;
1688
1689                 if (get_user(speed, (int __user *)argp))
1690                         return -EFAULT;
1691                 if (speed <= 0 || speed > info->max_baud)
1692                         return -EFAULT;
1693                 if (!info->tty || !info->tty->termios || !info->ioaddr)
1694                         return 0;
1695                 info->tty->termios->c_cflag &= ~(CBAUD | CBAUDEX);
1696                 for (i = 0; i < BAUD_TABLE_NO; i++)
1697                         if (speed == mxvar_baud_table[i])
1698                                 break;
1699                 if (i == BAUD_TABLE_NO) {
1700                         info->tty->termios->c_cflag |= B_SPEC;
1701                 } else if (speed != 0)
1702                         info->tty->termios->c_cflag |= mxvar_baud_table1[i];
1703
1704                 info->speed = speed;
1705                 spin_lock_irqsave(&info->slock, flags);
1706                 mxser_change_speed(info, NULL);
1707                 spin_unlock_irqrestore(&info->slock, flags);
1708
1709                 return 0;
1710         } else if (cmd == MOXA_GET_SPECIAL_BAUD_RATE) {
1711                 if (copy_to_user(argp, &info->speed, sizeof(int)))
1712                      return -EFAULT;
1713                 return 0;
1714         }
1715
1716         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1717                         test_bit(TTY_IO_ERROR, &tty->flags))
1718                 return -EIO;
1719
1720         switch (cmd) {
1721         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1722                 retval = tty_check_change(tty);
1723                 if (retval)
1724                         return retval;
1725                 tty_wait_until_sent(tty, 0);
1726                 if (!arg)
1727                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1728                 return 0;
1729         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1730                 retval = tty_check_change(tty);
1731                 if (retval)
1732                         return retval;
1733                 tty_wait_until_sent(tty, 0);
1734                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1735                 return 0;
1736         case TIOCGSOFTCAR:
1737                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1738         case TIOCSSOFTCAR:
1739                 if (get_user(templ, (unsigned long __user *) argp))
1740                         return -EFAULT;
1741                 arg = templ;
1742                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1743                 return 0;
1744         case TIOCGSERIAL:
1745                 return mxser_get_serial_info(info, argp);
1746         case TIOCSSERIAL:
1747                 return mxser_set_serial_info(info, argp);
1748         case TIOCSERGETLSR:     /* Get line status register */
1749                 return mxser_get_lsr_info(info, argp);
1750                 /*
1751                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1752                  * - mask passed in arg for lines of interest
1753                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1754                  * Caller should use TIOCGICOUNT to see which one it was
1755                  */
1756         case TIOCMIWAIT:
1757                 spin_lock_irqsave(&info->slock, flags);
1758                 cnow = info->icount;    /* note the counters on entry */
1759                 spin_unlock_irqrestore(&info->slock, flags);
1760
1761                 wait_event_interruptible(info->delta_msr_wait, ({
1762                         cprev = cnow;
1763                         spin_lock_irqsave(&info->slock, flags);
1764                         cnow = info->icount;    /* atomic copy */
1765                         spin_unlock_irqrestore(&info->slock, flags);
1766
1767                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1768                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1769                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1770                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1771                 }));
1772                 break;
1773         /*
1774          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1775          * Return: write counters to the user passed counter struct
1776          * NB: both 1->0 and 0->1 transitions are counted except for
1777          *     RI where only 0->1 is counted.
1778          */
1779         case TIOCGICOUNT:
1780                 spin_lock_irqsave(&info->slock, flags);
1781                 cnow = info->icount;
1782                 spin_unlock_irqrestore(&info->slock, flags);
1783                 p_cuser = argp;
1784                 if (put_user(cnow.frame, &p_cuser->frame))
1785                         return -EFAULT;
1786                 if (put_user(cnow.brk, &p_cuser->brk))
1787                         return -EFAULT;
1788                 if (put_user(cnow.overrun, &p_cuser->overrun))
1789                         return -EFAULT;
1790                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1791                         return -EFAULT;
1792                 if (put_user(cnow.parity, &p_cuser->parity))
1793                         return -EFAULT;
1794                 if (put_user(cnow.rx, &p_cuser->rx))
1795                         return -EFAULT;
1796                 if (put_user(cnow.tx, &p_cuser->tx))
1797                         return -EFAULT;
1798                 put_user(cnow.cts, &p_cuser->cts);
1799                 put_user(cnow.dsr, &p_cuser->dsr);
1800                 put_user(cnow.rng, &p_cuser->rng);
1801                 put_user(cnow.dcd, &p_cuser->dcd);
1802                 return 0;
1803         case MOXA_HighSpeedOn:
1804                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1805         case MOXA_SDS_RSTICOUNTER:
1806                 info->mon_data.rxcnt = 0;
1807                 info->mon_data.txcnt = 0;
1808                 return 0;
1809         case MOXA_ASPP_SETBAUD:{
1810                 long baud;
1811                 if (get_user(baud, (long __user *)argp))
1812                         return -EFAULT;
1813                 spin_lock_irqsave(&info->slock, flags);
1814                 mxser_set_baud(info, baud);
1815                 spin_unlock_irqrestore(&info->slock, flags);
1816                 return 0;
1817         }
1818         case MOXA_ASPP_GETBAUD:
1819                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1820                         return -EFAULT;
1821
1822                 return 0;
1823
1824         case MOXA_ASPP_OQUEUE:{
1825                 int len, lsr;
1826
1827                 len = mxser_chars_in_buffer(tty);
1828
1829                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1830
1831                 len += (lsr ? 0 : 1);
1832
1833                 if (copy_to_user(argp, &len, sizeof(int)))
1834                         return -EFAULT;
1835
1836                 return 0;
1837         }
1838         case MOXA_ASPP_MON: {
1839                 int mcr, status;
1840
1841                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1842                 mxser_check_modem_status(info, status);
1843
1844                 mcr = inb(info->ioaddr + UART_MCR);
1845                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1846                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1847                 else
1848                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1849
1850                 if (mcr & MOXA_MUST_MCR_TX_XON)
1851                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1852                 else
1853                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1854
1855                 if (info->tty->hw_stopped)
1856                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1857                 else
1858                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1859
1860                 if (copy_to_user(argp, &info->mon_data,
1861                                 sizeof(struct mxser_mon)))
1862                         return -EFAULT;
1863
1864                 return 0;
1865         }
1866         case MOXA_ASPP_LSTATUS: {
1867                 if (copy_to_user(argp, &info->err_shadow,
1868                                 sizeof(unsigned char)))
1869                         return -EFAULT;
1870
1871                 info->err_shadow = 0;
1872                 return 0;
1873         }
1874         case MOXA_SET_BAUD_METHOD: {
1875                 int method;
1876
1877                 if (get_user(method, (int __user *)argp))
1878                         return -EFAULT;
1879                 mxser_set_baud_method[tty->index] = method;
1880                 if (copy_to_user(argp, &method, sizeof(int)))
1881                         return -EFAULT;
1882
1883                 return 0;
1884         }
1885         default:
1886                 return -ENOIOCTLCMD;
1887         }
1888         return 0;
1889 }
1890
1891 static void mxser_stoprx(struct tty_struct *tty)
1892 {
1893         struct mxser_port *info = tty->driver_data;
1894
1895         info->ldisc_stop_rx = 1;
1896         if (I_IXOFF(tty)) {
1897                 if (info->board->chip_flag) {
1898                         info->IER &= ~MOXA_MUST_RECV_ISR;
1899                         outb(info->IER, info->ioaddr + UART_IER);
1900                 } else {
1901                         info->x_char = STOP_CHAR(tty);
1902                         outb(0, info->ioaddr + UART_IER);
1903                         info->IER |= UART_IER_THRI;
1904                         outb(info->IER, info->ioaddr + UART_IER);
1905                 }
1906         }
1907
1908         if (info->tty->termios->c_cflag & CRTSCTS) {
1909                 info->MCR &= ~UART_MCR_RTS;
1910                 outb(info->MCR, info->ioaddr + UART_MCR);
1911         }
1912 }
1913
1914 /*
1915  * This routine is called by the upper-layer tty layer to signal that
1916  * incoming characters should be throttled.
1917  */
1918 static void mxser_throttle(struct tty_struct *tty)
1919 {
1920         mxser_stoprx(tty);
1921 }
1922
1923 static void mxser_unthrottle(struct tty_struct *tty)
1924 {
1925         struct mxser_port *info = tty->driver_data;
1926
1927         /* startrx */
1928         info->ldisc_stop_rx = 0;
1929         if (I_IXOFF(tty)) {
1930                 if (info->x_char)
1931                         info->x_char = 0;
1932                 else {
1933                         if (info->board->chip_flag) {
1934                                 info->IER |= MOXA_MUST_RECV_ISR;
1935                                 outb(info->IER, info->ioaddr + UART_IER);
1936                         } else {
1937                                 info->x_char = START_CHAR(tty);
1938                                 outb(0, info->ioaddr + UART_IER);
1939                                 info->IER |= UART_IER_THRI;
1940                                 outb(info->IER, info->ioaddr + UART_IER);
1941                         }
1942                 }
1943         }
1944
1945         if (info->tty->termios->c_cflag & CRTSCTS) {
1946                 info->MCR |= UART_MCR_RTS;
1947                 outb(info->MCR, info->ioaddr + UART_MCR);
1948         }
1949 }
1950
1951 /*
1952  * mxser_stop() and mxser_start()
1953  *
1954  * This routines are called before setting or resetting tty->stopped.
1955  * They enable or disable transmitter interrupts, as necessary.
1956  */
1957 static void mxser_stop(struct tty_struct *tty)
1958 {
1959         struct mxser_port *info = tty->driver_data;
1960         unsigned long flags;
1961
1962         spin_lock_irqsave(&info->slock, flags);
1963         if (info->IER & UART_IER_THRI) {
1964                 info->IER &= ~UART_IER_THRI;
1965                 outb(info->IER, info->ioaddr + UART_IER);
1966         }
1967         spin_unlock_irqrestore(&info->slock, flags);
1968 }
1969
1970 static void mxser_start(struct tty_struct *tty)
1971 {
1972         struct mxser_port *info = tty->driver_data;
1973         unsigned long flags;
1974
1975         spin_lock_irqsave(&info->slock, flags);
1976         if (info->xmit_cnt && info->xmit_buf) {
1977                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1978                 info->IER |= UART_IER_THRI;
1979                 outb(info->IER, info->ioaddr + UART_IER);
1980         }
1981         spin_unlock_irqrestore(&info->slock, flags);
1982 }
1983
1984 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1985 {
1986         struct mxser_port *info = tty->driver_data;
1987         unsigned long flags;
1988
1989         spin_lock_irqsave(&info->slock, flags);
1990         mxser_change_speed(info, old_termios);
1991         spin_unlock_irqrestore(&info->slock, flags);
1992
1993         if ((old_termios->c_cflag & CRTSCTS) &&
1994                         !(tty->termios->c_cflag & CRTSCTS)) {
1995                 tty->hw_stopped = 0;
1996                 mxser_start(tty);
1997         }
1998
1999         /* Handle sw stopped */
2000         if ((old_termios->c_iflag & IXON) &&
2001                         !(tty->termios->c_iflag & IXON)) {
2002                 tty->stopped = 0;
2003
2004                 if (info->board->chip_flag) {
2005                         spin_lock_irqsave(&info->slock, flags);
2006                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2007                         spin_unlock_irqrestore(&info->slock, flags);
2008                 }
2009
2010                 mxser_start(tty);
2011         }
2012 }
2013
2014 /*
2015  * mxser_wait_until_sent() --- wait until the transmitter is empty
2016  */
2017 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2018 {
2019         struct mxser_port *info = tty->driver_data;
2020         unsigned long orig_jiffies, char_time;
2021         int lsr;
2022
2023         if (info->type == PORT_UNKNOWN)
2024                 return;
2025
2026         if (info->xmit_fifo_size == 0)
2027                 return;         /* Just in case.... */
2028
2029         orig_jiffies = jiffies;
2030         /*
2031          * Set the check interval to be 1/5 of the estimated time to
2032          * send a single character, and make it at least 1.  The check
2033          * interval should also be less than the timeout.
2034          *
2035          * Note: we have to use pretty tight timings here to satisfy
2036          * the NIST-PCTS.
2037          */
2038         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2039         char_time = char_time / 5;
2040         if (char_time == 0)
2041                 char_time = 1;
2042         if (timeout && timeout < char_time)
2043                 char_time = timeout;
2044         /*
2045          * If the transmitter hasn't cleared in twice the approximate
2046          * amount of time to send the entire FIFO, it probably won't
2047          * ever clear.  This assumes the UART isn't doing flow
2048          * control, which is currently the case.  Hence, if it ever
2049          * takes longer than info->timeout, this is probably due to a
2050          * UART bug of some kind.  So, we clamp the timeout parameter at
2051          * 2*info->timeout.
2052          */
2053         if (!timeout || timeout > 2 * info->timeout)
2054                 timeout = 2 * info->timeout;
2055 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2056         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2057                 timeout, char_time);
2058         printk("jiff=%lu...", jiffies);
2059 #endif
2060         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2061 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2062                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2063 #endif
2064                 schedule_timeout_interruptible(char_time);
2065                 if (signal_pending(current))
2066                         break;
2067                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2068                         break;
2069         }
2070         set_current_state(TASK_RUNNING);
2071
2072 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2073         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2074 #endif
2075 }
2076
2077 /*
2078  * This routine is called by tty_hangup() when a hangup is signaled.
2079  */
2080 static void mxser_hangup(struct tty_struct *tty)
2081 {
2082         struct mxser_port *info = tty->driver_data;
2083
2084         mxser_flush_buffer(tty);
2085         mxser_shutdown(info);
2086         info->event = 0;
2087         info->count = 0;
2088         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2089         info->tty = NULL;
2090         wake_up_interruptible(&info->open_wait);
2091 }
2092
2093 /*
2094  * mxser_rs_break() --- routine which turns the break handling on or off
2095  */
2096 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2097 {
2098         struct mxser_port *info = tty->driver_data;
2099         unsigned long flags;
2100
2101         spin_lock_irqsave(&info->slock, flags);
2102         if (break_state == -1)
2103                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2104                         info->ioaddr + UART_LCR);
2105         else
2106                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2107                         info->ioaddr + UART_LCR);
2108         spin_unlock_irqrestore(&info->slock, flags);
2109 }
2110
2111 static void mxser_receive_chars(struct mxser_port *port, int *status)
2112 {
2113         struct tty_struct *tty = port->tty;
2114         unsigned char ch, gdl;
2115         int ignored = 0;
2116         int cnt = 0;
2117         int recv_room;
2118         int max = 256;
2119
2120         recv_room = tty->receive_room;
2121         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2122                 mxser_stoprx(tty);
2123
2124         if (port->board->chip_flag != MOXA_OTHER_UART) {
2125
2126                 if (*status & UART_LSR_SPECIAL)
2127                         goto intr_old;
2128                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2129                                 (*status & MOXA_MUST_LSR_RERR))
2130                         goto intr_old;
2131                 if (*status & MOXA_MUST_LSR_RERR)
2132                         goto intr_old;
2133
2134                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2135
2136                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2137                         gdl &= MOXA_MUST_GDL_MASK;
2138                 if (gdl >= recv_room) {
2139                         if (!port->ldisc_stop_rx)
2140                                 mxser_stoprx(tty);
2141                 }
2142                 while (gdl--) {
2143                         ch = inb(port->ioaddr + UART_RX);
2144                         tty_insert_flip_char(tty, ch, 0);
2145                         cnt++;
2146                 }
2147                 goto end_intr;
2148         }
2149 intr_old:
2150
2151         do {
2152                 if (max-- < 0)
2153                         break;
2154
2155                 ch = inb(port->ioaddr + UART_RX);
2156                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2157                         outb(0x23, port->ioaddr + UART_FCR);
2158                 *status &= port->read_status_mask;
2159                 if (*status & port->ignore_status_mask) {
2160                         if (++ignored > 100)
2161                                 break;
2162                 } else {
2163                         char flag = 0;
2164                         if (*status & UART_LSR_SPECIAL) {
2165                                 if (*status & UART_LSR_BI) {
2166                                         flag = TTY_BREAK;
2167                                         port->icount.brk++;
2168
2169                                         if (port->flags & ASYNC_SAK)
2170                                                 do_SAK(tty);
2171                                 } else if (*status & UART_LSR_PE) {
2172                                         flag = TTY_PARITY;
2173                                         port->icount.parity++;
2174                                 } else if (*status & UART_LSR_FE) {
2175                                         flag = TTY_FRAME;
2176                                         port->icount.frame++;
2177                                 } else if (*status & UART_LSR_OE) {
2178                                         flag = TTY_OVERRUN;
2179                                         port->icount.overrun++;
2180                                 } else
2181                                         flag = TTY_BREAK;
2182                         }
2183                         tty_insert_flip_char(tty, ch, flag);
2184                         cnt++;
2185                         if (cnt >= recv_room) {
2186                                 if (!port->ldisc_stop_rx)
2187                                         mxser_stoprx(tty);
2188                                 break;
2189                         }
2190
2191                 }
2192
2193                 if (port->board->chip_flag)
2194                         break;
2195
2196                 *status = inb(port->ioaddr + UART_LSR);
2197         } while (*status & UART_LSR_DR);
2198
2199 end_intr:
2200         mxvar_log.rxcnt[port->tty->index] += cnt;
2201         port->mon_data.rxcnt += cnt;
2202         port->mon_data.up_rxcnt += cnt;
2203
2204         /*
2205          * We are called from an interrupt context with &port->slock
2206          * being held. Drop it temporarily in order to prevent
2207          * recursive locking.
2208          */
2209         spin_unlock(&port->slock);
2210         tty_flip_buffer_push(tty);
2211         spin_lock(&port->slock);
2212 }
2213
2214 static void mxser_transmit_chars(struct mxser_port *port)
2215 {
2216         int count, cnt;
2217
2218         if (port->x_char) {
2219                 outb(port->x_char, port->ioaddr + UART_TX);
2220                 port->x_char = 0;
2221                 mxvar_log.txcnt[port->tty->index]++;
2222                 port->mon_data.txcnt++;
2223                 port->mon_data.up_txcnt++;
2224                 port->icount.tx++;
2225                 return;
2226         }
2227
2228         if (port->xmit_buf == 0)
2229                 return;
2230
2231         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2232                         (port->tty->hw_stopped &&
2233                         (port->type != PORT_16550A) &&
2234                         (!port->board->chip_flag))) {
2235                 port->IER &= ~UART_IER_THRI;
2236                 outb(port->IER, port->ioaddr + UART_IER);
2237                 return;
2238         }
2239
2240         cnt = port->xmit_cnt;
2241         count = port->xmit_fifo_size;
2242         do {
2243                 outb(port->xmit_buf[port->xmit_tail++],
2244                         port->ioaddr + UART_TX);
2245                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2246                 if (--port->xmit_cnt <= 0)
2247                         break;
2248         } while (--count > 0);
2249         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2250
2251         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2252         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2253         port->icount.tx += (cnt - port->xmit_cnt);
2254
2255         if (port->xmit_cnt < WAKEUP_CHARS)
2256                 tty_wakeup(port->tty);
2257
2258         if (port->xmit_cnt <= 0) {
2259                 port->IER &= ~UART_IER_THRI;
2260                 outb(port->IER, port->ioaddr + UART_IER);
2261         }
2262 }
2263
2264 /*
2265  * This is the serial driver's generic interrupt routine
2266  */
2267 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2268 {
2269         int status, iir, i;
2270         struct mxser_board *brd = NULL;
2271         struct mxser_port *port;
2272         int max, irqbits, bits, msr;
2273         unsigned int int_cnt, pass_counter = 0;
2274         int handled = IRQ_NONE;
2275
2276         for (i = 0; i < MXSER_BOARDS; i++)
2277                 if (dev_id == &mxser_boards[i]) {
2278                         brd = dev_id;
2279                         break;
2280                 }
2281
2282         if (i == MXSER_BOARDS)
2283                 goto irq_stop;
2284         if (brd == NULL)
2285                 goto irq_stop;
2286         max = brd->info->nports;
2287         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2288                 irqbits = inb(brd->vector) & brd->vector_mask;
2289                 if (irqbits == brd->vector_mask)
2290                         break;
2291
2292                 handled = IRQ_HANDLED;
2293                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2294                         if (irqbits == brd->vector_mask)
2295                                 break;
2296                         if (bits & irqbits)
2297                                 continue;
2298                         port = &brd->ports[i];
2299
2300                         int_cnt = 0;
2301                         spin_lock(&port->slock);
2302                         do {
2303                                 iir = inb(port->ioaddr + UART_IIR);
2304                                 if (iir & UART_IIR_NO_INT)
2305                                         break;
2306                                 iir &= MOXA_MUST_IIR_MASK;
2307                                 if (!port->tty ||
2308                                                 (port->flags & ASYNC_CLOSING) ||
2309                                                 !(port->flags &
2310                                                         ASYNC_INITIALIZED)) {
2311                                         status = inb(port->ioaddr + UART_LSR);
2312                                         outb(0x27, port->ioaddr + UART_FCR);
2313                                         inb(port->ioaddr + UART_MSR);
2314                                         break;
2315                                 }
2316
2317                                 status = inb(port->ioaddr + UART_LSR);
2318
2319                                 if (status & UART_LSR_PE)
2320                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2321                                 if (status & UART_LSR_FE)
2322                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2323                                 if (status & UART_LSR_OE)
2324                                         port->err_shadow |=
2325                                                 NPPI_NOTIFY_HW_OVERRUN;
2326                                 if (status & UART_LSR_BI)
2327                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2328
2329                                 if (port->board->chip_flag) {
2330                                         if (iir == MOXA_MUST_IIR_GDA ||
2331                                             iir == MOXA_MUST_IIR_RDA ||
2332                                             iir == MOXA_MUST_IIR_RTO ||
2333                                             iir == MOXA_MUST_IIR_LSR)
2334                                                 mxser_receive_chars(port,
2335                                                                 &status);
2336
2337                                 } else {
2338                                         status &= port->read_status_mask;
2339                                         if (status & UART_LSR_DR)
2340                                                 mxser_receive_chars(port,
2341                                                                 &status);
2342                                 }
2343                                 msr = inb(port->ioaddr + UART_MSR);
2344                                 if (msr & UART_MSR_ANY_DELTA)
2345                                         mxser_check_modem_status(port, msr);
2346
2347                                 if (port->board->chip_flag) {
2348                                         if (iir == 0x02 && (status &
2349                                                                 UART_LSR_THRE))
2350                                                 mxser_transmit_chars(port);
2351                                 } else {
2352                                         if (status & UART_LSR_THRE)
2353                                                 mxser_transmit_chars(port);
2354                                 }
2355                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2356                         spin_unlock(&port->slock);
2357                 }
2358         }
2359
2360 irq_stop:
2361         return handled;
2362 }
2363
2364 static const struct tty_operations mxser_ops = {
2365         .open = mxser_open,
2366         .close = mxser_close,
2367         .write = mxser_write,
2368         .put_char = mxser_put_char,
2369         .flush_chars = mxser_flush_chars,
2370         .write_room = mxser_write_room,
2371         .chars_in_buffer = mxser_chars_in_buffer,
2372         .flush_buffer = mxser_flush_buffer,
2373         .ioctl = mxser_ioctl,
2374         .throttle = mxser_throttle,
2375         .unthrottle = mxser_unthrottle,
2376         .set_termios = mxser_set_termios,
2377         .stop = mxser_stop,
2378         .start = mxser_start,
2379         .hangup = mxser_hangup,
2380         .break_ctl = mxser_rs_break,
2381         .wait_until_sent = mxser_wait_until_sent,
2382         .tiocmget = mxser_tiocmget,
2383         .tiocmset = mxser_tiocmset,
2384 };
2385
2386 /*
2387  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2388  */
2389
2390 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2391                 unsigned int irq)
2392 {
2393         if (irq)
2394                 free_irq(brd->irq, brd);
2395         if (pdev != NULL) {     /* PCI */
2396 #ifdef CONFIG_PCI
2397                 pci_release_region(pdev, 2);
2398                 pci_release_region(pdev, 3);
2399 #endif
2400         } else {
2401                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2402                 release_region(brd->vector, 1);
2403         }
2404 }
2405
2406 static int __devinit mxser_initbrd(struct mxser_board *brd,
2407                 struct pci_dev *pdev)
2408 {
2409         struct mxser_port *info;
2410         unsigned int i;
2411         int retval;
2412
2413         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2414
2415         for (i = 0; i < brd->info->nports; i++) {
2416                 info = &brd->ports[i];
2417                 info->board = brd;
2418                 info->stop_rx = 0;
2419                 info->ldisc_stop_rx = 0;
2420
2421                 /* Enhance mode enabled here */
2422                 if (brd->chip_flag != MOXA_OTHER_UART)
2423                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2424
2425                 info->flags = ASYNC_SHARE_IRQ;
2426                 info->type = brd->uart_type;
2427
2428                 process_txrx_fifo(info);
2429
2430                 info->custom_divisor = info->baud_base * 16;
2431                 info->close_delay = 5 * HZ / 10;
2432                 info->closing_wait = 30 * HZ;
2433                 info->normal_termios = mxvar_sdriver->init_termios;
2434                 init_waitqueue_head(&info->open_wait);
2435                 init_waitqueue_head(&info->delta_msr_wait);
2436                 info->speed = 9600;
2437                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2438                 info->err_shadow = 0;
2439                 spin_lock_init(&info->slock);
2440
2441                 /* before set INT ISR, disable all int */
2442                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2443                         info->ioaddr + UART_IER);
2444         }
2445
2446         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2447                         brd);
2448         if (retval) {
2449                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2450                         "conflict with another device.\n",
2451                         brd->info->name, brd->irq);
2452                 /* We hold resources, we need to release them. */
2453                 mxser_release_res(brd, pdev, 0);
2454         }
2455         return retval;
2456 }
2457
2458 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2459 {
2460         int id, i, bits;
2461         unsigned short regs[16], irq;
2462         unsigned char scratch, scratch2;
2463
2464         brd->chip_flag = MOXA_OTHER_UART;
2465
2466         id = mxser_read_register(cap, regs);
2467         switch (id) {
2468         case C168_ASIC_ID:
2469                 brd->info = &mxser_cards[0];
2470                 break;
2471         case C104_ASIC_ID:
2472                 brd->info = &mxser_cards[1];
2473                 break;
2474         case CI104J_ASIC_ID:
2475                 brd->info = &mxser_cards[2];
2476                 break;
2477         case C102_ASIC_ID:
2478                 brd->info = &mxser_cards[5];
2479                 break;
2480         case CI132_ASIC_ID:
2481                 brd->info = &mxser_cards[6];
2482                 break;
2483         case CI134_ASIC_ID:
2484                 brd->info = &mxser_cards[7];
2485                 break;
2486         default:
2487                 return 0;
2488         }
2489
2490         irq = 0;
2491         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2492            Flag-hack checks if configuration should be read as 2-port here. */
2493         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2494                 irq = regs[9] & 0xF000;
2495                 irq = irq | (irq >> 4);
2496                 if (irq != (regs[9] & 0xFF00))
2497                         return MXSER_ERR_IRQ_CONFLIT;
2498         } else if (brd->info->nports == 4) {
2499                 irq = regs[9] & 0xF000;
2500                 irq = irq | (irq >> 4);
2501                 irq = irq | (irq >> 8);
2502                 if (irq != regs[9])
2503                         return MXSER_ERR_IRQ_CONFLIT;
2504         } else if (brd->info->nports == 8) {
2505                 irq = regs[9] & 0xF000;
2506                 irq = irq | (irq >> 4);
2507                 irq = irq | (irq >> 8);
2508                 if ((irq != regs[9]) || (irq != regs[10]))
2509                         return MXSER_ERR_IRQ_CONFLIT;
2510         }
2511
2512         if (!irq)
2513                 return MXSER_ERR_IRQ;
2514         brd->irq = ((int)(irq & 0xF000) >> 12);
2515         for (i = 0; i < 8; i++)
2516                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2517         if ((regs[12] & 0x80) == 0)
2518                 return MXSER_ERR_VECTOR;
2519         brd->vector = (int)regs[11];    /* interrupt vector */
2520         if (id == 1)
2521                 brd->vector_mask = 0x00FF;
2522         else
2523                 brd->vector_mask = 0x000F;
2524         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2525                 if (regs[12] & bits) {
2526                         brd->ports[i].baud_base = 921600;
2527                         brd->ports[i].max_baud = 921600;
2528                 } else {
2529                         brd->ports[i].baud_base = 115200;
2530                         brd->ports[i].max_baud = 115200;
2531                 }
2532         }
2533         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2534         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2535         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2536         outb(scratch2, cap + UART_LCR);
2537         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2538         scratch = inb(cap + UART_IIR);
2539
2540         if (scratch & 0xC0)
2541                 brd->uart_type = PORT_16550A;
2542         else
2543                 brd->uart_type = PORT_16450;
2544         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2545                         "mxser(IO)"))
2546                 return MXSER_ERR_IOADDR;
2547         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2548                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2549                 return MXSER_ERR_VECTOR;
2550         }
2551         return brd->info->nports;
2552 }
2553
2554 static int __devinit mxser_probe(struct pci_dev *pdev,
2555                 const struct pci_device_id *ent)
2556 {
2557 #ifdef CONFIG_PCI
2558         struct mxser_board *brd;
2559         unsigned int i, j;
2560         unsigned long ioaddress;
2561         int retval = -EINVAL;
2562
2563         for (i = 0; i < MXSER_BOARDS; i++)
2564                 if (mxser_boards[i].info == NULL)
2565                         break;
2566
2567         if (i >= MXSER_BOARDS) {
2568                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2569                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2570                 goto err;
2571         }
2572
2573         brd = &mxser_boards[i];
2574         brd->idx = i * MXSER_PORTS_PER_BOARD;
2575         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2576                 mxser_cards[ent->driver_data].name,
2577                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2578
2579         retval = pci_enable_device(pdev);
2580         if (retval) {
2581                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2582                 goto err;
2583         }
2584
2585         /* io address */
2586         ioaddress = pci_resource_start(pdev, 2);
2587         retval = pci_request_region(pdev, 2, "mxser(IO)");
2588         if (retval)
2589                 goto err;
2590
2591         brd->info = &mxser_cards[ent->driver_data];
2592         for (i = 0; i < brd->info->nports; i++)
2593                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2594
2595         /* vector */
2596         ioaddress = pci_resource_start(pdev, 3);
2597         retval = pci_request_region(pdev, 3, "mxser(vector)");
2598         if (retval)
2599                 goto err_relio;
2600         brd->vector = ioaddress;
2601
2602         /* irq */
2603         brd->irq = pdev->irq;
2604
2605         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2606         brd->uart_type = PORT_16550A;
2607         brd->vector_mask = 0;
2608
2609         for (i = 0; i < brd->info->nports; i++) {
2610                 for (j = 0; j < UART_INFO_NUM; j++) {
2611                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2612                                 brd->ports[i].max_baud =
2613                                         Gpci_uart_info[j].max_baud;
2614
2615                                 /* exception....CP-102 */
2616                                 if (brd->info->flags & MXSER_HIGHBAUD)
2617                                         brd->ports[i].max_baud = 921600;
2618                                 break;
2619                         }
2620                 }
2621         }
2622
2623         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2624                 for (i = 0; i < brd->info->nports; i++) {
2625                         if (i < 4)
2626                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2627                         else
2628                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2629                 }
2630                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2631                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2632         }
2633
2634         for (i = 0; i < brd->info->nports; i++) {
2635                 brd->vector_mask |= (1 << i);
2636                 brd->ports[i].baud_base = 921600;
2637         }
2638
2639         /* mxser_initbrd will hook ISR. */
2640         retval = mxser_initbrd(brd, pdev);
2641         if (retval)
2642                 goto err_null;
2643
2644         for (i = 0; i < brd->info->nports; i++)
2645                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2646
2647         pci_set_drvdata(pdev, brd);
2648
2649         return 0;
2650 err_relio:
2651         pci_release_region(pdev, 2);
2652 err_null:
2653         brd->info = NULL;
2654 err:
2655         return retval;
2656 #else
2657         return -ENODEV;
2658 #endif
2659 }
2660
2661 static void __devexit mxser_remove(struct pci_dev *pdev)
2662 {
2663         struct mxser_board *brd = pci_get_drvdata(pdev);
2664         unsigned int i;
2665
2666         for (i = 0; i < brd->info->nports; i++)
2667                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2668
2669         mxser_release_res(brd, pdev, 1);
2670         brd->info = NULL;
2671 }
2672
2673 static struct pci_driver mxser_driver = {
2674         .name = "mxser",
2675         .id_table = mxser_pcibrds,
2676         .probe = mxser_probe,
2677         .remove = __devexit_p(mxser_remove)
2678 };
2679
2680 static int __init mxser_module_init(void)
2681 {
2682         struct mxser_board *brd;
2683         unsigned long cap;
2684         unsigned int i, m, isaloop;
2685         int retval, b;
2686
2687         pr_debug("Loading module mxser ...\n");
2688
2689         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2690         if (!mxvar_sdriver)
2691                 return -ENOMEM;
2692
2693         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2694                 MXSER_VERSION);
2695
2696         /* Initialize the tty_driver structure */
2697         mxvar_sdriver->owner = THIS_MODULE;
2698         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2699         mxvar_sdriver->name = "ttyMI";
2700         mxvar_sdriver->major = ttymajor;
2701         mxvar_sdriver->minor_start = 0;
2702         mxvar_sdriver->num = MXSER_PORTS + 1;
2703         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2704         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2705         mxvar_sdriver->init_termios = tty_std_termios;
2706         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2707         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2708         tty_set_operations(mxvar_sdriver, &mxser_ops);
2709
2710         retval = tty_register_driver(mxvar_sdriver);
2711         if (retval) {
2712                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2713                                 "tty driver !\n");
2714                 goto err_put;
2715         }
2716
2717         mxvar_diagflag = 0;
2718
2719         m = 0;
2720         /* Start finding ISA boards here */
2721         for (isaloop = 0; isaloop < 2; isaloop++)
2722                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2723                         if (!isaloop)
2724                                 cap = mxserBoardCAP[b]; /* predefined */
2725                         else
2726                                 cap = ioaddr[b]; /* module param */
2727
2728                         if (!cap)
2729                                 continue;
2730
2731                         brd = &mxser_boards[m];
2732                         retval = mxser_get_ISA_conf(cap, brd);
2733
2734                         if (retval != 0)
2735                                 printk(KERN_INFO "Found MOXA %s board "
2736                                         "(CAP=0x%x)\n",
2737                                         brd->info->name, ioaddr[b]);
2738
2739                         if (retval <= 0) {
2740                                 if (retval == MXSER_ERR_IRQ)
2741                                         printk(KERN_ERR "Invalid interrupt "
2742                                                 "number, board not "
2743                                                 "configured\n");
2744                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2745                                         printk(KERN_ERR "Invalid interrupt "
2746                                                 "number, board not "
2747                                                 "configured\n");
2748                                 else if (retval == MXSER_ERR_VECTOR)
2749                                         printk(KERN_ERR "Invalid interrupt "
2750                                                 "vector, board not "
2751                                                 "configured\n");
2752                                 else if (retval == MXSER_ERR_IOADDR)
2753                                         printk(KERN_ERR "Invalid I/O address, "
2754                                                 "board not configured\n");
2755
2756                                 brd->info = NULL;
2757                                 continue;
2758                         }
2759
2760                         /* mxser_initbrd will hook ISR. */
2761                         if (mxser_initbrd(brd, NULL) < 0) {
2762                                 brd->info = NULL;
2763                                 continue;
2764                         }
2765
2766                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2767                         for (i = 0; i < brd->info->nports; i++)
2768                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2769                                                 NULL);
2770
2771                         m++;
2772                 }
2773
2774         retval = pci_register_driver(&mxser_driver);
2775         if (retval) {
2776                 printk(KERN_ERR "Can't register pci driver\n");
2777                 if (!m) {
2778                         retval = -ENODEV;
2779                         goto err_unr;
2780                 } /* else: we have some ISA cards under control */
2781         }
2782
2783         pr_debug("Done.\n");
2784
2785         return 0;
2786 err_unr:
2787         tty_unregister_driver(mxvar_sdriver);
2788 err_put:
2789         put_tty_driver(mxvar_sdriver);
2790         return retval;
2791 }
2792
2793 static void __exit mxser_module_exit(void)
2794 {
2795         unsigned int i, j;
2796
2797         pr_debug("Unloading module mxser ...\n");
2798
2799         pci_unregister_driver(&mxser_driver);
2800
2801         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2802                 if (mxser_boards[i].info != NULL)
2803                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2804                                 tty_unregister_device(mxvar_sdriver,
2805                                                 mxser_boards[i].idx + j);
2806         tty_unregister_driver(mxvar_sdriver);
2807         put_tty_driver(mxvar_sdriver);
2808
2809         for (i = 0; i < MXSER_BOARDS; i++)
2810                 if (mxser_boards[i].info != NULL)
2811                         mxser_release_res(&mxser_boards[i], NULL, 1);
2812
2813         pr_debug("Done.\n");
2814 }
2815
2816 module_init(mxser_module_init);
2817 module_exit(mxser_module_exit);