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/errno.h>
  24 #include <linux/signal.h>
  25 #include <linux/sched.h>
  26 #include <linux/timer.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/tty.h>
  29 #include <linux/tty_flip.h>
  30 #include <linux/serial.h>
  31 #include <linux/serial_reg.h>
  32 #include <linux/major.h>
  33 #include <linux/string.h>
  34 #include <linux/fcntl.h>
  35 #include <linux/ptrace.h>
  36 #include <linux/gfp.h>
  37 #include <linux/ioport.h>
  38 #include <linux/mm.h>
  39 #include <linux/delay.h>
  40 #include <linux/pci.h>
  41 #include <linux/bitops.h>
  42
  43 #include <asm/system.h>
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/uaccess.h>
  47
  48 #include "mxser_new.h"
  49
  50 #define MXSER_VERSION   "2.0.2"         /* 1.10 */
  51 #define MXSERMAJOR       174
  52 #define MXSERCUMAJOR     175
  53
  54 #define MXSER_BOARDS            4       /* Max. boards */
  55 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  56 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  57 #define MXSER_ISR_PASS_LIMIT    100
  58
  59 #define MXSER_ERR_IOADDR        -1
  60 #define MXSER_ERR_IRQ           -2
  61 #define MXSER_ERR_IRQ_CONFLIT   -3
  62 #define MXSER_ERR_VECTOR        -4
  63
  64 /*CheckIsMoxaMust return value*/
  65 #define MOXA_OTHER_UART         0x00
  66 #define MOXA_MUST_MU150_HWID    0x01
  67 #define MOXA_MUST_MU860_HWID    0x02
  68
  69 #define WAKEUP_CHARS            256
  70
  71 #define UART_MCR_AFE            0x20
  72 #define UART_LSR_SPECIAL        0x1E
  73
  74 #define PCI_DEVICE_ID_CB108     0x1080
  75 #define PCI_DEVICE_ID_CB114     0x1142
  76 #define PCI_DEVICE_ID_CB134I    0x1341
  77 #define PCI_DEVICE_ID_CP138U    0x1380
  78 #define PCI_DEVICE_ID_POS104UL  0x1044
  79
  80
  81 #define C168_ASIC_ID    1
  82 #define C104_ASIC_ID    2
  83 #define C102_ASIC_ID    0xB
  84 #define CI132_ASIC_ID   4
  85 #define CI134_ASIC_ID   3
  86 #define CI104J_ASIC_ID  5
  87
  88 #define MXSER_HIGHBAUD  1
  89 #define MXSER_HAS2      2
  90
  91 /* This is only for PCI */
  92 static const struct {
  93         int type;
  94         int tx_fifo;
  95         int rx_fifo;
  96         int xmit_fifo_size;
  97         int rx_high_water;
  98         int rx_trigger;
  99         int rx_low_water;
 100         long max_baud;
 101 } Gpci_uart_info[] = {
 102         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 103         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 104         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 105 };
 106 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 107
 108 struct mxser_cardinfo {
 109         unsigned int nports;
 110         char *name;
 111         unsigned int flags;
 112 };
 113
 114 static const struct mxser_cardinfo mxser_cards[] = {
 115 /* 0*/  { 8, "C168 series", },
 116         { 4, "C104 series", },
 117         { 4, "CI-104J series", },
 118         { 8, "C168H/PCI series", },
 119         { 4, "C104H/PCI series", },
 120 /* 5*/  { 4, "C102 series", MXSER_HAS2 },       /* C102-ISA */
 121         { 4, "CI-132 series", MXSER_HAS2 },
 122         { 4, "CI-134 series", },
 123         { 2, "CP-132 series", },
 124         { 4, "CP-114 series", },
 125 /*10*/  { 4, "CT-114 series", },
 126         { 2, "CP-102 series", MXSER_HIGHBAUD },
 127         { 4, "CP-104U series", },
 128         { 8, "CP-168U series", },
 129         { 2, "CP-132U series", },
 130 /*15*/  { 4, "CP-134U series", },
 131         { 4, "CP-104JU series", },
 132         { 8, "Moxa UC7000 Serial", },           /* RC7000 */
 133         { 8, "CP-118U series", },
 134         { 2, "CP-102UL series", },
 135 /*20*/  { 2, "CP-102U series", },
 136         { 8, "CP-118EL series", },
 137         { 8, "CP-168EL series", },
 138         { 4, "CP-104EL series", },
 139         { 8, "CB-108 series", },
 140 /*25*/  { 4, "CB-114 series", },
 141         { 4, "CB-134I series", },
 142         { 8, "CP-138U series", },
 143         { 4, "POS-104UL series", }
 144 };
 145
 146 /* driver_data correspond to the lines in the structure above
 147    see also ISA probe function before you change something */
 148 static struct pci_device_id mxser_pcibrds[] = {
 149         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168),   .driver_data = 3 },
 150         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104),   .driver_data = 4 },
 151         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132),  .driver_data = 8 },
 152         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114),  .driver_data = 9 },
 153         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114),  .driver_data = 10 },
 154         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102),  .driver_data = 11 },
 155         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
 156         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
 157         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
 158         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
 159         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
 160         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
 161         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
 162         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
 163         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
 164         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
 165         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
 166         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
 167         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108),       .driver_data = 24 },
 168         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114),       .driver_data = 25 },
 169         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I),      .driver_data = 26 },
 170         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U),      .driver_data = 27 },
 171         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL),    .driver_data = 28 },
 172         { }
 173 };
 174 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 175
 176 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 177 static int ttymajor = MXSERMAJOR;
 178 static int calloutmajor = MXSERCUMAJOR;
 179
 180 /* Variables for insmod */
 181
 182 MODULE_AUTHOR("Casper Yang");
 183 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 184 module_param_array(ioaddr, int, NULL, 0);
 185 module_param(ttymajor, int, 0);
 186 MODULE_LICENSE("GPL");
 187
 188 struct mxser_log {
 189         int tick;
 190         unsigned long rxcnt[MXSER_PORTS];
 191         unsigned long txcnt[MXSER_PORTS];
 192 };
 193
 194
 195 struct mxser_mon {
 196         unsigned long rxcnt;
 197         unsigned long txcnt;
 198         unsigned long up_rxcnt;
 199         unsigned long up_txcnt;
 200         int modem_status;
 201         unsigned char hold_reason;
 202 };
 203
 204 struct mxser_mon_ext {
 205         unsigned long rx_cnt[32];
 206         unsigned long tx_cnt[32];
 207         unsigned long up_rxcnt[32];
 208         unsigned long up_txcnt[32];
 209         int modem_status[32];
 210
 211         long baudrate[32];
 212         int databits[32];
 213         int stopbits[32];
 214         int parity[32];
 215         int flowctrl[32];
 216         int fifo[32];
 217         int iftype[32];
 218 };
 219
 220 struct mxser_board;
 221
 222 struct mxser_port {
 223         struct mxser_board *board;
 224         struct tty_struct *tty;
 225
 226         unsigned long ioaddr;
 227         unsigned long opmode_ioaddr;
 228         int max_baud;
 229
 230         int rx_high_water;
 231         int rx_trigger;         /* Rx fifo trigger level */
 232         int rx_low_water;
 233         int baud_base;          /* max. speed */
 234         int type;               /* UART type */
 235         int flags;              /* defined in tty.h */
 236
 237         int x_char;             /* xon/xoff character */
 238         int IER;                /* Interrupt Enable Register */
 239         int MCR;                /* Modem control register */
 240
 241         unsigned char stop_rx;
 242         unsigned char ldisc_stop_rx;
 243
 244         int custom_divisor;
 245         int close_delay;
 246         unsigned short closing_wait;
 247         unsigned char err_shadow;
 248         unsigned long event;
 249
 250         int count;              /* # of fd on device */
 251         int blocked_open;       /* # of blocked opens */
 252         struct async_icount icount; /* kernel counters for 4 input interrupts */
 253         int timeout;
 254
 255         int read_status_mask;
 256         int ignore_status_mask;
 257         int xmit_fifo_size;
 258         unsigned char *xmit_buf;
 259         int xmit_head;
 260         int xmit_tail;
 261         int xmit_cnt;
 262
 263         struct ktermios normal_termios;
 264
 265         struct mxser_mon mon_data;
 266
 267         spinlock_t slock;
 268         wait_queue_head_t open_wait;
 269         wait_queue_head_t delta_msr_wait;
 270 };
 271
 272 struct mxser_board {
 273         unsigned int idx;
 274         int irq;
 275         const struct mxser_cardinfo *info;
 276         unsigned long vector;
 277         unsigned long vector_mask;
 278
 279         int chip_flag;
 280         int uart_type;
 281
 282         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 283 };
 284
 285 struct mxser_mstatus {
 286         tcflag_t cflag;
 287         int cts;
 288         int dsr;
 289         int ri;
 290         int dcd;
 291 };
 292
 293 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 294
 295 static int mxserBoardCAP[MXSER_BOARDS] = {
 296         0, 0, 0, 0
 297         /*  0x180, 0x280, 0x200, 0x320 */
 298 };
 299
 300 static struct mxser_board mxser_boards[MXSER_BOARDS];
 301 static struct tty_driver *mxvar_sdriver;
 302 static struct mxser_log mxvar_log;
 303 static int mxvar_diagflag;
 304 static unsigned char mxser_msr[MXSER_PORTS + 1];
 305 static struct mxser_mon_ext mon_data_ext;
 306 static int mxser_set_baud_method[MXSER_PORTS + 1];
 307
 308 #ifdef CONFIG_PCI
 309 static int __devinit CheckIsMoxaMust(unsigned long io)
 310 {
 311         u8 oldmcr, hwid;
 312         int i;
 313
 314         outb(0, io + UART_LCR);
 315         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 316         oldmcr = inb(io + UART_MCR);
 317         outb(0, io + UART_MCR);
 318         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 319         if ((hwid = inb(io + UART_MCR)) != 0) {
 320                 outb(oldmcr, io + UART_MCR);
 321                 return MOXA_OTHER_UART;
 322         }
 323
 324         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 325         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 326                 if (hwid == Gpci_uart_info[i].type)
 327                         return (int)hwid;
 328         }
 329         return MOXA_OTHER_UART;
 330 }
 331 #endif
 332
 333 static void process_txrx_fifo(struct mxser_port *info)
 334 {
 335         int i;
 336
 337         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 338                 info->rx_trigger = 1;
 339                 info->rx_high_water = 1;
 340                 info->rx_low_water = 1;
 341                 info->xmit_fifo_size = 1;
 342         } else
 343                 for (i = 0; i < UART_INFO_NUM; i++)
 344                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 345                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 346                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 347                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 348                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 349                                 break;
 350                         }
 351 }
 352
 353 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 354 {
 355         unsigned char status = 0;
 356
 357         status = inb(baseaddr + UART_MSR);
 358
 359         mxser_msr[port] &= 0x0F;
 360         mxser_msr[port] |= status;
 361         status = mxser_msr[port];
 362         if (mode)
 363                 mxser_msr[port] = 0;
 364
 365         return status;
 366 }
 367
 368 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 369                 struct mxser_port *port)
 370 {
 371         DECLARE_WAITQUEUE(wait, current);
 372         int retval;
 373         int do_clocal = 0;
 374         unsigned long flags;
 375
 376         /*
 377          * If non-blocking mode is set, or the port is not enabled,
 378          * then make the check up front and then exit.
 379          */
 380         if ((filp->f_flags & O_NONBLOCK) ||
 381                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 382                 port->flags |= ASYNC_NORMAL_ACTIVE;
 383                 return 0;
 384         }
 385
 386         if (tty->termios->c_cflag & CLOCAL)
 387                 do_clocal = 1;
 388
 389         /*
 390          * Block waiting for the carrier detect and the line to become
 391          * free (i.e., not in use by the callout).  While we are in
 392          * this loop, port->count is dropped by one, so that
 393          * mxser_close() knows when to free things.  We restore it upon
 394          * exit, either normal or abnormal.
 395          */
 396         retval = 0;
 397         add_wait_queue(&port->open_wait, &wait);
 398
 399         spin_lock_irqsave(&port->slock, flags);
 400         if (!tty_hung_up_p(filp))
 401                 port->count--;
 402         spin_unlock_irqrestore(&port->slock, flags);
 403         port->blocked_open++;
 404         while (1) {
 405                 spin_lock_irqsave(&port->slock, flags);
 406                 outb(inb(port->ioaddr + UART_MCR) |
 407                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 408                 spin_unlock_irqrestore(&port->slock, flags);
 409                 set_current_state(TASK_INTERRUPTIBLE);
 410                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 411                         if (port->flags & ASYNC_HUP_NOTIFY)
 412                                 retval = -EAGAIN;
 413                         else
 414                                 retval = -ERESTARTSYS;
 415                         break;
 416                 }
 417                 if (!(port->flags & ASYNC_CLOSING) &&
 418                                 (do_clocal ||
 419                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 420                         break;
 421                 if (signal_pending(current)) {
 422                         retval = -ERESTARTSYS;
 423                         break;
 424                 }
 425                 schedule();
 426         }
 427         set_current_state(TASK_RUNNING);
 428         remove_wait_queue(&port->open_wait, &wait);
 429         if (!tty_hung_up_p(filp))
 430                 port->count++;
 431         port->blocked_open--;
 432         if (retval)
 433                 return retval;
 434         port->flags |= ASYNC_NORMAL_ACTIVE;
 435         return 0;
 436 }
 437
 438 static int mxser_set_baud(struct mxser_port *info, long newspd)
 439 {
 440         int quot = 0, baud;
 441         unsigned char cval;
 442
 443         if (!info->tty || !info->tty->termios)
 444                 return -1;
 445
 446         if (!(info->ioaddr))
 447                 return -1;
 448
 449         if (newspd > info->max_baud)
 450                 return -1;
 451
 452         if (newspd == 134) {
 453                 quot = 2 * info->baud_base / 269;
 454                 tty_encode_baud_rate(info->tty, 134, 134);
 455         } else if (newspd) {
 456                 quot = info->baud_base / newspd;
 457                 if (quot == 0)
 458                         quot = 1;
 459                 baud = info->baud_base/quot;
 460                 tty_encode_baud_rate(info->tty, baud, baud);
 461         } else {
 462                 quot = 0;
 463         }
 464
 465         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 466         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 467
 468         if (quot) {
 469                 info->MCR |= UART_MCR_DTR;
 470                 outb(info->MCR, info->ioaddr + UART_MCR);
 471         } else {
 472                 info->MCR &= ~UART_MCR_DTR;
 473                 outb(info->MCR, info->ioaddr + UART_MCR);
 474                 return 0;
 475         }
 476
 477         cval = inb(info->ioaddr + UART_LCR);
 478
 479         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 480
 481         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 482         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 483         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 484
 485 #ifdef BOTHER
 486         if (C_BAUD(info->tty) == BOTHER) {
 487                 quot = info->baud_base % newspd;
 488                 quot *= 8;
 489                 if (quot % newspd > newspd / 2) {
 490                         quot /= newspd;
 491                         quot++;
 492                 } else
 493                         quot /= newspd;
 494
 495                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
 496         } else
 497 #endif
 498                 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
 499
 500         return 0;
 501 }
 502
 503 /*
 504  * This routine is called to set the UART divisor registers to match
 505  * the specified baud rate for a serial port.
 506  */
 507 static int mxser_change_speed(struct mxser_port *info,
 508                 struct ktermios *old_termios)
 509 {
 510         unsigned cflag, cval, fcr;
 511         int ret = 0;
 512         unsigned char status;
 513
 514         if (!info->tty || !info->tty->termios)
 515                 return ret;
 516         cflag = info->tty->termios->c_cflag;
 517         if (!(info->ioaddr))
 518                 return ret;
 519
 520         if (mxser_set_baud_method[info->tty->index] == 0)
 521                 mxser_set_baud(info, tty_get_baud_rate(info->tty));
 522
 523         /* byte size and parity */
 524         switch (cflag & CSIZE) {
 525         case CS5:
 526                 cval = 0x00;
 527                 break;
 528         case CS6:
 529                 cval = 0x01;
 530                 break;
 531         case CS7:
 532                 cval = 0x02;
 533                 break;
 534         case CS8:
 535                 cval = 0x03;
 536                 break;
 537         default:
 538                 cval = 0x00;
 539                 break;          /* too keep GCC shut... */
 540         }
 541         if (cflag & CSTOPB)
 542                 cval |= 0x04;
 543         if (cflag & PARENB)
 544                 cval |= UART_LCR_PARITY;
 545         if (!(cflag & PARODD))
 546                 cval |= UART_LCR_EPAR;
 547         if (cflag & CMSPAR)
 548                 cval |= UART_LCR_SPAR;
 549
 550         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 551                 if (info->board->chip_flag) {
 552                         fcr = UART_FCR_ENABLE_FIFO;
 553                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 554                         SET_MOXA_MUST_FIFO_VALUE(info);
 555                 } else
 556                         fcr = 0;
 557         } else {
 558                 fcr = UART_FCR_ENABLE_FIFO;
 559                 if (info->board->chip_flag) {
 560                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 561                         SET_MOXA_MUST_FIFO_VALUE(info);
 562                 } else {
 563                         switch (info->rx_trigger) {
 564                         case 1:
 565                                 fcr |= UART_FCR_TRIGGER_1;
 566                                 break;
 567                         case 4:
 568                                 fcr |= UART_FCR_TRIGGER_4;
 569                                 break;
 570                         case 8:
 571                                 fcr |= UART_FCR_TRIGGER_8;
 572                                 break;
 573                         default:
 574                                 fcr |= UART_FCR_TRIGGER_14;
 575                                 break;
 576                         }
 577                 }
 578         }
 579
 580         /* CTS flow control flag and modem status interrupts */
 581         info->IER &= ~UART_IER_MSI;
 582         info->MCR &= ~UART_MCR_AFE;
 583         if (cflag & CRTSCTS) {
 584                 info->flags |= ASYNC_CTS_FLOW;
 585                 info->IER |= UART_IER_MSI;
 586                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 587                         info->MCR |= UART_MCR_AFE;
 588                 } else {
 589                         status = inb(info->ioaddr + UART_MSR);
 590                         if (info->tty->hw_stopped) {
 591                                 if (status & UART_MSR_CTS) {
 592                                         info->tty->hw_stopped = 0;
 593                                         if (info->type != PORT_16550A &&
 594                                                         !info->board->chip_flag) {
 595                                                 outb(info->IER & ~UART_IER_THRI,
 596                                                         info->ioaddr +
 597                                                         UART_IER);
 598                                                 info->IER |= UART_IER_THRI;
 599                                                 outb(info->IER, info->ioaddr +
 600                                                                 UART_IER);
 601                                         }
 602                                         tty_wakeup(info->tty);
 603                                 }
 604                         } else {
 605                                 if (!(status & UART_MSR_CTS)) {
 606                                         info->tty->hw_stopped = 1;
 607                                         if ((info->type != PORT_16550A) &&
 608                                                         (!info->board->chip_flag)) {
 609                                                 info->IER &= ~UART_IER_THRI;
 610                                                 outb(info->IER, info->ioaddr +
 611                                                                 UART_IER);
 612                                         }
 613                                 }
 614                         }
 615                 }
 616         } else {
 617                 info->flags &= ~ASYNC_CTS_FLOW;
 618         }
 619         outb(info->MCR, info->ioaddr + UART_MCR);
 620         if (cflag & CLOCAL) {
 621                 info->flags &= ~ASYNC_CHECK_CD;
 622         } else {
 623                 info->flags |= ASYNC_CHECK_CD;
 624                 info->IER |= UART_IER_MSI;
 625         }
 626         outb(info->IER, info->ioaddr + UART_IER);
 627
 628         /*
 629          * Set up parity check flag
 630          */
 631         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 632         if (I_INPCK(info->tty))
 633                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 634         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 635                 info->read_status_mask |= UART_LSR_BI;
 636
 637         info->ignore_status_mask = 0;
 638
 639         if (I_IGNBRK(info->tty)) {
 640                 info->ignore_status_mask |= UART_LSR_BI;
 641                 info->read_status_mask |= UART_LSR_BI;
 642                 /*
 643                  * If we're ignore parity and break indicators, ignore
 644                  * overruns too.  (For real raw support).
 645                  */
 646                 if (I_IGNPAR(info->tty)) {
 647                         info->ignore_status_mask |=
 648                                                 UART_LSR_OE |
 649                                                 UART_LSR_PE |
 650                                                 UART_LSR_FE;
 651                         info->read_status_mask |=
 652                                                 UART_LSR_OE |
 653                                                 UART_LSR_PE |
 654                                                 UART_LSR_FE;
 655                 }
 656         }
 657         if (info->board->chip_flag) {
 658                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 659                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 660                 if (I_IXON(info->tty)) {
 661                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 662                 } else {
 663                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 664                 }
 665                 if (I_IXOFF(info->tty)) {
 666                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 667                 } else {
 668                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 669                 }
 670         }
 671
 672
 673         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 674         outb(cval, info->ioaddr + UART_LCR);
 675
 676         return ret;
 677 }
 678
 679 static void mxser_check_modem_status(struct mxser_port *port, int status)
 680 {
 681         /* update input line counters */
 682         if (status & UART_MSR_TERI)
 683                 port->icount.rng++;
 684         if (status & UART_MSR_DDSR)
 685                 port->icount.dsr++;
 686         if (status & UART_MSR_DDCD)
 687                 port->icount.dcd++;
 688         if (status & UART_MSR_DCTS)
 689                 port->icount.cts++;
 690         port->mon_data.modem_status = status;
 691         wake_up_interruptible(&port->delta_msr_wait);
 692
 693         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 694                 if (status & UART_MSR_DCD)
 695                         wake_up_interruptible(&port->open_wait);
 696         }
 697
 698         if (port->flags & ASYNC_CTS_FLOW) {
 699                 if (port->tty->hw_stopped) {
 700                         if (status & UART_MSR_CTS) {
 701                                 port->tty->hw_stopped = 0;
 702
 703                                 if ((port->type != PORT_16550A) &&
 704                                                 (!port->board->chip_flag)) {
 705                                         outb(port->IER & ~UART_IER_THRI,
 706                                                 port->ioaddr + UART_IER);
 707                                         port->IER |= UART_IER_THRI;
 708                                         outb(port->IER, port->ioaddr +
 709                                                         UART_IER);
 710                                 }
 711                                 tty_wakeup(port->tty);
 712                         }
 713                 } else {
 714                         if (!(status & UART_MSR_CTS)) {
 715                                 port->tty->hw_stopped = 1;
 716                                 if (port->type != PORT_16550A &&
 717                                                 !port->board->chip_flag) {
 718                                         port->IER &= ~UART_IER_THRI;
 719                                         outb(port->IER, port->ioaddr +
 720                                                         UART_IER);
 721                                 }
 722                         }
 723                 }
 724         }
 725 }
 726
 727 static int mxser_startup(struct mxser_port *info)
 728 {
 729         unsigned long page;
 730         unsigned long flags;
 731
 732         page = __get_free_page(GFP_KERNEL);
 733         if (!page)
 734                 return -ENOMEM;
 735
 736         spin_lock_irqsave(&info->slock, flags);
 737
 738         if (info->flags & ASYNC_INITIALIZED) {
 739                 free_page(page);
 740                 spin_unlock_irqrestore(&info->slock, flags);
 741                 return 0;
 742         }
 743
 744         if (!info->ioaddr || !info->type) {
 745                 if (info->tty)
 746                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 747                 free_page(page);
 748                 spin_unlock_irqrestore(&info->slock, flags);
 749                 return 0;
 750         }
 751         if (info->xmit_buf)
 752                 free_page(page);
 753         else
 754                 info->xmit_buf = (unsigned char *) page;
 755
 756         /*
 757          * Clear the FIFO buffers and disable them
 758          * (they will be reenabled in mxser_change_speed())
 759          */
 760         if (info->board->chip_flag)
 761                 outb((UART_FCR_CLEAR_RCVR |
 762                         UART_FCR_CLEAR_XMIT |
 763                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 764         else
 765                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 766                         info->ioaddr + UART_FCR);
 767
 768         /*
 769          * At this point there's no way the LSR could still be 0xFF;
 770          * if it is, then bail out, because there's likely no UART
 771          * here.
 772          */
 773         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 774                 spin_unlock_irqrestore(&info->slock, flags);
 775                 if (capable(CAP_SYS_ADMIN)) {
 776                         if (info->tty)
 777                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 778                         return 0;
 779                 } else
 780                         return -ENODEV;
 781         }
 782
 783         /*
 784          * Clear the interrupt registers.
 785          */
 786         (void) inb(info->ioaddr + UART_LSR);
 787         (void) inb(info->ioaddr + UART_RX);
 788         (void) inb(info->ioaddr + UART_IIR);
 789         (void) inb(info->ioaddr + UART_MSR);
 790
 791         /*
 792          * Now, initialize the UART
 793          */
 794         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 795         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 796         outb(info->MCR, info->ioaddr + UART_MCR);
 797
 798         /*
 799          * Finally, enable interrupts
 800          */
 801         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 802
 803         if (info->board->chip_flag)
 804                 info->IER |= MOXA_MUST_IER_EGDAI;
 805         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 806
 807         /*
 808          * And clear the interrupt registers again for luck.
 809          */
 810         (void) inb(info->ioaddr + UART_LSR);
 811         (void) inb(info->ioaddr + UART_RX);
 812         (void) inb(info->ioaddr + UART_IIR);
 813         (void) inb(info->ioaddr + UART_MSR);
 814
 815         if (info->tty)
 816                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 817         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 818
 819         /*
 820          * and set the speed of the serial port
 821          */
 822         mxser_change_speed(info, NULL);
 823         info->flags |= ASYNC_INITIALIZED;
 824         spin_unlock_irqrestore(&info->slock, flags);
 825
 826         return 0;
 827 }
 828
 829 /*
 830  * This routine will shutdown a serial port; interrupts maybe disabled, and
 831  * DTR is dropped if the hangup on close termio flag is on.
 832  */
 833 static void mxser_shutdown(struct mxser_port *info)
 834 {
 835         unsigned long flags;
 836
 837         if (!(info->flags & ASYNC_INITIALIZED))
 838                 return;
 839
 840         spin_lock_irqsave(&info->slock, flags);
 841
 842         /*
 843          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 844          * here so the queue might never be waken up
 845          */
 846         wake_up_interruptible(&info->delta_msr_wait);
 847
 848         /*
 849          * Free the IRQ, if necessary
 850          */
 851         if (info->xmit_buf) {
 852                 free_page((unsigned long) info->xmit_buf);
 853                 info->xmit_buf = NULL;
 854         }
 855
 856         info->IER = 0;
 857         outb(0x00, info->ioaddr + UART_IER);
 858
 859         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 860                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 861         outb(info->MCR, info->ioaddr + UART_MCR);
 862
 863         /* clear Rx/Tx FIFO's */
 864         if (info->board->chip_flag)
 865                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 866                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 867                                 info->ioaddr + UART_FCR);
 868         else
 869                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 870                         info->ioaddr + UART_FCR);
 871
 872         /* read data port to reset things */
 873         (void) inb(info->ioaddr + UART_RX);
 874
 875         if (info->tty)
 876                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 877
 878         info->flags &= ~ASYNC_INITIALIZED;
 879
 880         if (info->board->chip_flag)
 881                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 882
 883         spin_unlock_irqrestore(&info->slock, flags);
 884 }
 885
 886 /*
 887  * This routine is called whenever a serial port is opened.  It
 888  * enables interrupts for a serial port, linking in its async structure into
 889  * the IRQ chain.   It also performs the serial-specific
 890  * initialization for the tty structure.
 891  */
 892 static int mxser_open(struct tty_struct *tty, struct file *filp)
 893 {
 894         struct mxser_port *info;
 895         unsigned long flags;
 896         int retval, line;
 897
 898         line = tty->index;
 899         if (line == MXSER_PORTS)
 900                 return 0;
 901         if (line < 0 || line > MXSER_PORTS)
 902                 return -ENODEV;
 903         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 904         if (!info->ioaddr)
 905                 return -ENODEV;
 906
 907         tty->driver_data = info;
 908         info->tty = tty;
 909         /*
 910          * Start up serial port
 911          */
 912         spin_lock_irqsave(&info->slock, flags);
 913         info->count++;
 914         spin_unlock_irqrestore(&info->slock, flags);
 915         retval = mxser_startup(info);
 916         if (retval)
 917                 return retval;
 918
 919         retval = mxser_block_til_ready(tty, filp, info);
 920         if (retval)
 921                 return retval;
 922
 923         /* unmark here for very high baud rate (ex. 921600 bps) used */
 924         tty->low_latency = 1;
 925         return 0;
 926 }
 927
 928 /*
 929  * This routine is called when the serial port gets closed.  First, we
 930  * wait for the last remaining data to be sent.  Then, we unlink its
 931  * async structure from the interrupt chain if necessary, and we free
 932  * that IRQ if nothing is left in the chain.
 933  */
 934 static void mxser_close(struct tty_struct *tty, struct file *filp)
 935 {
 936         struct mxser_port *info = tty->driver_data;
 937
 938         unsigned long timeout;
 939         unsigned long flags;
 940
 941         if (tty->index == MXSER_PORTS)
 942                 return;
 943         if (!info)
 944                 return;
 945
 946         spin_lock_irqsave(&info->slock, flags);
 947
 948         if (tty_hung_up_p(filp)) {
 949                 spin_unlock_irqrestore(&info->slock, flags);
 950                 return;
 951         }
 952         if ((tty->count == 1) && (info->count != 1)) {
 953                 /*
 954                  * Uh, oh.  tty->count is 1, which means that the tty
 955                  * structure will be freed.  Info->count should always
 956                  * be one in these conditions.  If it's greater than
 957                  * one, we've got real problems, since it means the
 958                  * serial port won't be shutdown.
 959                  */
 960                 printk(KERN_ERR "mxser_close: bad serial port count; "
 961                         "tty->count is 1, info->count is %d\n", info->count);
 962                 info->count = 1;
 963         }
 964         if (--info->count < 0) {
 965                 printk(KERN_ERR "mxser_close: bad serial port count for "
 966                         "ttys%d: %d\n", tty->index, info->count);
 967                 info->count = 0;
 968         }
 969         if (info->count) {
 970                 spin_unlock_irqrestore(&info->slock, flags);
 971                 return;
 972         }
 973         info->flags |= ASYNC_CLOSING;
 974         spin_unlock_irqrestore(&info->slock, flags);
 975         /*
 976          * Save the termios structure, since this port may have
 977          * separate termios for callout and dialin.
 978          */
 979         if (info->flags & ASYNC_NORMAL_ACTIVE)
 980                 info->normal_termios = *tty->termios;
 981         /*
 982          * Now we wait for the transmit buffer to clear; and we notify
 983          * the line discipline to only process XON/XOFF characters.
 984          */
 985         tty->closing = 1;
 986         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
 987                 tty_wait_until_sent(tty, info->closing_wait);
 988         /*
 989          * At this point we stop accepting input.  To do this, we
 990          * disable the receive line status interrupts, and tell the
 991          * interrupt driver to stop checking the data ready bit in the
 992          * line status register.
 993          */
 994         info->IER &= ~UART_IER_RLSI;
 995         if (info->board->chip_flag)
 996                 info->IER &= ~MOXA_MUST_RECV_ISR;
 997
 998         if (info->flags & ASYNC_INITIALIZED) {
 999                 outb(info->IER, info->ioaddr + UART_IER);
1000                 /*
1001                  * Before we drop DTR, make sure the UART transmitter
1002                  * has completely drained; this is especially
1003                  * important if there is a transmit FIFO!
1004                  */
1005                 timeout = jiffies + HZ;
1006                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1007                         schedule_timeout_interruptible(5);
1008                         if (time_after(jiffies, timeout))
1009                                 break;
1010                 }
1011         }
1012         mxser_shutdown(info);
1013
1014         if (tty->driver->flush_buffer)
1015                 tty->driver->flush_buffer(tty);
1016
1017         tty_ldisc_flush(tty);
1018
1019         tty->closing = 0;
1020         info->event = 0;
1021         info->tty = NULL;
1022         if (info->blocked_open) {
1023                 if (info->close_delay)
1024                         schedule_timeout_interruptible(info->close_delay);
1025                 wake_up_interruptible(&info->open_wait);
1026         }
1027
1028         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1029 }
1030
1031 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1032 {
1033         int c, total = 0;
1034         struct mxser_port *info = tty->driver_data;
1035         unsigned long flags;
1036
1037         if (!info->xmit_buf)
1038                 return 0;
1039
1040         while (1) {
1041                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1042                                           SERIAL_XMIT_SIZE - info->xmit_head));
1043                 if (c <= 0)
1044                         break;
1045
1046                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1047                 spin_lock_irqsave(&info->slock, flags);
1048                 info->xmit_head = (info->xmit_head + c) &
1049                                   (SERIAL_XMIT_SIZE - 1);
1050                 info->xmit_cnt += c;
1051                 spin_unlock_irqrestore(&info->slock, flags);
1052
1053                 buf += c;
1054                 count -= c;
1055                 total += c;
1056         }
1057
1058         if (info->xmit_cnt && !tty->stopped) {
1059                 if (!tty->hw_stopped ||
1060                                 (info->type == PORT_16550A) ||
1061                                 (info->board->chip_flag)) {
1062                         spin_lock_irqsave(&info->slock, flags);
1063                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1064                                         UART_IER);
1065                         info->IER |= UART_IER_THRI;
1066                         outb(info->IER, info->ioaddr + UART_IER);
1067                         spin_unlock_irqrestore(&info->slock, flags);
1068                 }
1069         }
1070         return total;
1071 }
1072
1073 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1074 {
1075         struct mxser_port *info = tty->driver_data;
1076         unsigned long flags;
1077
1078         if (!info->xmit_buf)
1079                 return;
1080
1081         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1082                 return;
1083
1084         spin_lock_irqsave(&info->slock, flags);
1085         info->xmit_buf[info->xmit_head++] = ch;
1086         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1087         info->xmit_cnt++;
1088         spin_unlock_irqrestore(&info->slock, flags);
1089         if (!tty->stopped) {
1090                 if (!tty->hw_stopped ||
1091                                 (info->type == PORT_16550A) ||
1092                                 info->board->chip_flag) {
1093                         spin_lock_irqsave(&info->slock, flags);
1094                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1095                         info->IER |= UART_IER_THRI;
1096                         outb(info->IER, info->ioaddr + UART_IER);
1097                         spin_unlock_irqrestore(&info->slock, flags);
1098                 }
1099         }
1100 }
1101
1102
1103 static void mxser_flush_chars(struct tty_struct *tty)
1104 {
1105         struct mxser_port *info = tty->driver_data;
1106         unsigned long flags;
1107
1108         if (info->xmit_cnt <= 0 ||
1109                         tty->stopped ||
1110                         !info->xmit_buf ||
1111                         (tty->hw_stopped &&
1112                          (info->type != PORT_16550A) &&
1113                          (!info->board->chip_flag)
1114                         ))
1115                 return;
1116
1117         spin_lock_irqsave(&info->slock, flags);
1118
1119         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1120         info->IER |= UART_IER_THRI;
1121         outb(info->IER, info->ioaddr + UART_IER);
1122
1123         spin_unlock_irqrestore(&info->slock, flags);
1124 }
1125
1126 static int mxser_write_room(struct tty_struct *tty)
1127 {
1128         struct mxser_port *info = tty->driver_data;
1129         int ret;
1130
1131         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1132         if (ret < 0)
1133                 ret = 0;
1134         return ret;
1135 }
1136
1137 static int mxser_chars_in_buffer(struct tty_struct *tty)
1138 {
1139         struct mxser_port *info = tty->driver_data;
1140         return info->xmit_cnt;
1141 }
1142
1143 static void mxser_flush_buffer(struct tty_struct *tty)
1144 {
1145         struct mxser_port *info = tty->driver_data;
1146         char fcr;
1147         unsigned long flags;
1148
1149
1150         spin_lock_irqsave(&info->slock, flags);
1151         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1152
1153         fcr = inb(info->ioaddr + UART_FCR);
1154         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1155                 info->ioaddr + UART_FCR);
1156         outb(fcr, info->ioaddr + UART_FCR);
1157
1158         spin_unlock_irqrestore(&info->slock, flags);
1159
1160         tty_wakeup(tty);
1161 }
1162
1163 /*
1164  * ------------------------------------------------------------
1165  * friends of mxser_ioctl()
1166  * ------------------------------------------------------------
1167  */
1168 static int mxser_get_serial_info(struct mxser_port *info,
1169                 struct serial_struct __user *retinfo)
1170 {
1171         struct serial_struct tmp;
1172
1173         if (!retinfo)
1174                 return -EFAULT;
1175         memset(&tmp, 0, sizeof(tmp));
1176         tmp.type = info->type;
1177         tmp.line = info->tty->index;
1178         tmp.port = info->ioaddr;
1179         tmp.irq = info->board->irq;
1180         tmp.flags = info->flags;
1181         tmp.baud_base = info->baud_base;
1182         tmp.close_delay = info->close_delay;
1183         tmp.closing_wait = info->closing_wait;
1184         tmp.custom_divisor = info->custom_divisor;
1185         tmp.hub6 = 0;
1186         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1187                 return -EFAULT;
1188         return 0;
1189 }
1190
1191 static int mxser_set_serial_info(struct mxser_port *info,
1192                 struct serial_struct __user *new_info)
1193 {
1194         struct serial_struct new_serial;
1195         unsigned long sl_flags;
1196         unsigned int flags;
1197         int retval = 0;
1198
1199         if (!new_info || !info->ioaddr)
1200                 return -EFAULT;
1201         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1202                 return -EFAULT;
1203
1204         if ((new_serial.irq != info->board->irq) ||
1205                         (new_serial.port != info->ioaddr) ||
1206                         (new_serial.custom_divisor != info->custom_divisor) ||
1207                         (new_serial.baud_base != info->baud_base))
1208                 return -EPERM;
1209
1210         flags = info->flags & ASYNC_SPD_MASK;
1211
1212         if (!capable(CAP_SYS_ADMIN)) {
1213                 if ((new_serial.baud_base != info->baud_base) ||
1214                                 (new_serial.close_delay != info->close_delay) ||
1215                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1216                         return -EPERM;
1217                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1218                                 (new_serial.flags & ASYNC_USR_MASK));
1219         } else {
1220                 /*
1221                  * OK, past this point, all the error checking has been done.
1222                  * At this point, we start making changes.....
1223                  */
1224                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1225                                 (new_serial.flags & ASYNC_FLAGS));
1226                 info->close_delay = new_serial.close_delay * HZ / 100;
1227                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1228                 info->tty->low_latency =
1229                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1230                 info->tty->low_latency = 0;
1231         }
1232
1233         info->type = new_serial.type;
1234
1235         process_txrx_fifo(info);
1236
1237         if (info->flags & ASYNC_INITIALIZED) {
1238                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1239                         spin_lock_irqsave(&info->slock, sl_flags);
1240                         mxser_change_speed(info, NULL);
1241                         spin_unlock_irqrestore(&info->slock, sl_flags);
1242                 }
1243         } else
1244                 retval = mxser_startup(info);
1245
1246         return retval;
1247 }
1248
1249 /*
1250  * mxser_get_lsr_info - get line status register info
1251  *
1252  * Purpose: Let user call ioctl() to get info when the UART physically
1253  *          is emptied.  On bus types like RS485, the transmitter must
1254  *          release the bus after transmitting. This must be done when
1255  *          the transmit shift register is empty, not be done when the
1256  *          transmit holding register is empty.  This functionality
1257  *          allows an RS485 driver to be written in user space.
1258  */
1259 static int mxser_get_lsr_info(struct mxser_port *info,
1260                 unsigned int __user *value)
1261 {
1262         unsigned char status;
1263         unsigned int result;
1264         unsigned long flags;
1265
1266         spin_lock_irqsave(&info->slock, flags);
1267         status = inb(info->ioaddr + UART_LSR);
1268         spin_unlock_irqrestore(&info->slock, flags);
1269         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1270         return put_user(result, value);
1271 }
1272
1273 /*
1274  * This routine sends a break character out the serial port.
1275  */
1276 static void mxser_send_break(struct mxser_port *info, int duration)
1277 {
1278         unsigned long flags;
1279
1280         if (!info->ioaddr)
1281                 return;
1282         set_current_state(TASK_INTERRUPTIBLE);
1283         spin_lock_irqsave(&info->slock, flags);
1284         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1285                 info->ioaddr + UART_LCR);
1286         spin_unlock_irqrestore(&info->slock, flags);
1287         schedule_timeout(duration);
1288         spin_lock_irqsave(&info->slock, flags);
1289         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1290                 info->ioaddr + UART_LCR);
1291         spin_unlock_irqrestore(&info->slock, flags);
1292 }
1293
1294 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1295 {
1296         struct mxser_port *info = tty->driver_data;
1297         unsigned char control, status;
1298         unsigned long flags;
1299
1300
1301         if (tty->index == MXSER_PORTS)
1302                 return -ENOIOCTLCMD;
1303         if (test_bit(TTY_IO_ERROR, &tty->flags))
1304                 return -EIO;
1305
1306         control = info->MCR;
1307
1308         spin_lock_irqsave(&info->slock, flags);
1309         status = inb(info->ioaddr + UART_MSR);
1310         if (status & UART_MSR_ANY_DELTA)
1311                 mxser_check_modem_status(info, status);
1312         spin_unlock_irqrestore(&info->slock, flags);
1313         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1314                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1315                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1316                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1317                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1318                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1319 }
1320
1321 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1322                 unsigned int set, unsigned int clear)
1323 {
1324         struct mxser_port *info = tty->driver_data;
1325         unsigned long flags;
1326
1327
1328         if (tty->index == MXSER_PORTS)
1329                 return -ENOIOCTLCMD;
1330         if (test_bit(TTY_IO_ERROR, &tty->flags))
1331                 return -EIO;
1332
1333         spin_lock_irqsave(&info->slock, flags);
1334
1335         if (set & TIOCM_RTS)
1336                 info->MCR |= UART_MCR_RTS;
1337         if (set & TIOCM_DTR)
1338                 info->MCR |= UART_MCR_DTR;
1339
1340         if (clear & TIOCM_RTS)
1341                 info->MCR &= ~UART_MCR_RTS;
1342         if (clear & TIOCM_DTR)
1343                 info->MCR &= ~UART_MCR_DTR;
1344
1345         outb(info->MCR, info->ioaddr + UART_MCR);
1346         spin_unlock_irqrestore(&info->slock, flags);
1347         return 0;
1348 }
1349
1350 static int __init mxser_program_mode(int port)
1351 {
1352         int id, i, j, n;
1353
1354         outb(0, port);
1355         outb(0, port);
1356         outb(0, port);
1357         (void)inb(port);
1358         (void)inb(port);
1359         outb(0, port);
1360         (void)inb(port);
1361
1362         id = inb(port + 1) & 0x1F;
1363         if ((id != C168_ASIC_ID) &&
1364                         (id != C104_ASIC_ID) &&
1365                         (id != C102_ASIC_ID) &&
1366                         (id != CI132_ASIC_ID) &&
1367                         (id != CI134_ASIC_ID) &&
1368                         (id != CI104J_ASIC_ID))
1369                 return -1;
1370         for (i = 0, j = 0; i < 4; i++) {
1371                 n = inb(port + 2);
1372                 if (n == 'M') {
1373                         j = 1;
1374                 } else if ((j == 1) && (n == 1)) {
1375                         j = 2;
1376                         break;
1377                 } else
1378                         j = 0;
1379         }
1380         if (j != 2)
1381                 id = -2;
1382         return id;
1383 }
1384
1385 static void __init mxser_normal_mode(int port)
1386 {
1387         int i, n;
1388
1389         outb(0xA5, port + 1);
1390         outb(0x80, port + 3);
1391         outb(12, port + 0);     /* 9600 bps */
1392         outb(0, port + 1);
1393         outb(0x03, port + 3);   /* 8 data bits */
1394         outb(0x13, port + 4);   /* loop back mode */
1395         for (i = 0; i < 16; i++) {
1396                 n = inb(port + 5);
1397                 if ((n & 0x61) == 0x60)
1398                         break;
1399                 if ((n & 1) == 1)
1400                         (void)inb(port);
1401         }
1402         outb(0x00, port + 4);
1403 }
1404
1405 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1406 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1407 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1408 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1409 #define EN_CCMD         0x000   /* Chip's command register     */
1410 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1411 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1412 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1413 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1414 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1415 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1416 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1417 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1418 static int __init mxser_read_register(int port, unsigned short *regs)
1419 {
1420         int i, k, value, id;
1421         unsigned int j;
1422
1423         id = mxser_program_mode(port);
1424         if (id < 0)
1425                 return id;
1426         for (i = 0; i < 14; i++) {
1427                 k = (i & 0x3F) | 0x180;
1428                 for (j = 0x100; j > 0; j >>= 1) {
1429                         outb(CHIP_CS, port);
1430                         if (k & j) {
1431                                 outb(CHIP_CS | CHIP_DO, port);
1432                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1433                         } else {
1434                                 outb(CHIP_CS, port);
1435                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1436                         }
1437                 }
1438                 (void)inb(port);
1439                 value = 0;
1440                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1441                         outb(CHIP_CS, port);
1442                         outb(CHIP_CS | CHIP_SK, port);
1443                         if (inb(port) & CHIP_DI)
1444                                 value |= j;
1445                 }
1446                 regs[i] = value;
1447                 outb(0, port);
1448         }
1449         mxser_normal_mode(port);
1450         return id;
1451 }
1452
1453 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1454 {
1455         struct mxser_port *port;
1456         int result, status;
1457         unsigned int i, j;
1458
1459         switch (cmd) {
1460         case MOXA_GET_CONF:
1461 /*              if (copy_to_user(argp, mxsercfg,
1462                                 sizeof(struct mxser_hwconf) * 4))
1463                         return -EFAULT;
1464                 return 0;*/
1465                 return -ENXIO;
1466         case MOXA_GET_MAJOR:
1467                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1468                         return -EFAULT;
1469                 return 0;
1470
1471         case MOXA_GET_CUMAJOR:
1472                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1473                         return -EFAULT;
1474                 return 0;
1475
1476         case MOXA_CHKPORTENABLE:
1477                 result = 0;
1478
1479                 for (i = 0; i < MXSER_BOARDS; i++)
1480                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1481                                 if (mxser_boards[i].ports[j].ioaddr)
1482                                         result |= (1 << i);
1483
1484                 return put_user(result, (unsigned long __user *)argp);
1485         case MOXA_GETDATACOUNT:
1486                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1487                         return -EFAULT;
1488                 return 0;
1489         case MOXA_GETMSTATUS:
1490                 for (i = 0; i < MXSER_BOARDS; i++)
1491                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1492                                 port = &mxser_boards[i].ports[j];
1493
1494                                 GMStatus[i].ri = 0;
1495                                 if (!port->ioaddr) {
1496                                         GMStatus[i].dcd = 0;
1497                                         GMStatus[i].dsr = 0;
1498                                         GMStatus[i].cts = 0;
1499                                         continue;
1500                                 }
1501
1502                                 if (!port->tty || !port->tty->termios)
1503                                         GMStatus[i].cflag =
1504                                                 port->normal_termios.c_cflag;
1505                                 else
1506                                         GMStatus[i].cflag =
1507                                                 port->tty->termios->c_cflag;
1508
1509                                 status = inb(port->ioaddr + UART_MSR);
1510                                 if (status & 0x80 /*UART_MSR_DCD */ )
1511                                         GMStatus[i].dcd = 1;
1512                                 else
1513                                         GMStatus[i].dcd = 0;
1514
1515                                 if (status & 0x20 /*UART_MSR_DSR */ )
1516                                         GMStatus[i].dsr = 1;
1517                                 else
1518                                         GMStatus[i].dsr = 0;
1519
1520
1521                                 if (status & 0x10 /*UART_MSR_CTS */ )
1522                                         GMStatus[i].cts = 1;
1523                                 else
1524                                         GMStatus[i].cts = 0;
1525                         }
1526                 if (copy_to_user(argp, GMStatus,
1527                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1528                         return -EFAULT;
1529                 return 0;
1530         case MOXA_ASPP_MON_EXT: {
1531                 int p, shiftbit;
1532                 unsigned long opmode;
1533                 unsigned cflag, iflag;
1534
1535                 for (i = 0; i < MXSER_BOARDS; i++)
1536                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1537                                 port = &mxser_boards[i].ports[j];
1538                                 if (!port->ioaddr)
1539                                         continue;
1540
1541                                 status = mxser_get_msr(port->ioaddr, 0, i);
1542
1543                                 if (status & UART_MSR_TERI)
1544                                         port->icount.rng++;
1545                                 if (status & UART_MSR_DDSR)
1546                                         port->icount.dsr++;
1547                                 if (status & UART_MSR_DDCD)
1548                                         port->icount.dcd++;
1549                                 if (status & UART_MSR_DCTS)
1550                                         port->icount.cts++;
1551
1552                                 port->mon_data.modem_status = status;
1553                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1554                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1555                                 mon_data_ext.up_rxcnt[i] =
1556                                         port->mon_data.up_rxcnt;
1557                                 mon_data_ext.up_txcnt[i] =
1558                                         port->mon_data.up_txcnt;
1559                                 mon_data_ext.modem_status[i] =
1560                                         port->mon_data.modem_status;
1561                                 mon_data_ext.baudrate[i] =
1562                                         tty_get_baud_rate(port->tty);
1563
1564                                 if (!port->tty || !port->tty->termios) {
1565                                         cflag = port->normal_termios.c_cflag;
1566                                         iflag = port->normal_termios.c_iflag;
1567                                 } else {
1568                                         cflag = port->tty->termios->c_cflag;
1569                                         iflag = port->tty->termios->c_iflag;
1570                                 }
1571
1572                                 mon_data_ext.databits[i] = cflag & CSIZE;
1573
1574                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1575
1576                                 mon_data_ext.parity[i] =
1577                                         cflag & (PARENB | PARODD | CMSPAR);
1578
1579                                 mon_data_ext.flowctrl[i] = 0x00;
1580
1581                                 if (cflag & CRTSCTS)
1582                                         mon_data_ext.flowctrl[i] |= 0x03;
1583
1584                                 if (iflag & (IXON | IXOFF))
1585                                         mon_data_ext.flowctrl[i] |= 0x0C;
1586
1587                                 if (port->type == PORT_16550A)
1588                                         mon_data_ext.fifo[i] = 1;
1589                                 else
1590                                         mon_data_ext.fifo[i] = 0;
1591
1592                                 p = i % 4;
1593                                 shiftbit = p * 2;
1594                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1595                                 opmode &= OP_MODE_MASK;
1596
1597                                 mon_data_ext.iftype[i] = opmode;
1598
1599                         }
1600                         if (copy_to_user(argp, &mon_data_ext,
1601                                                 sizeof(mon_data_ext)))
1602                                 return -EFAULT;
1603
1604                         return 0;
1605
1606         } default:
1607                 return -ENOIOCTLCMD;
1608         }
1609         return 0;
1610 }
1611
1612 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1613                 unsigned int cmd, unsigned long arg)
1614 {
1615         struct mxser_port *info = tty->driver_data;
1616         struct async_icount cprev, cnow;        /* kernel counter temps */
1617         struct serial_icounter_struct __user *p_cuser;
1618         unsigned long templ;
1619         unsigned long flags;
1620         void __user *argp = (void __user *)arg;
1621         int retval;
1622
1623         if (tty->index == MXSER_PORTS)
1624                 return mxser_ioctl_special(cmd, argp);
1625
1626         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1627                 int p;
1628                 unsigned long opmode;
1629                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1630                 int shiftbit;
1631                 unsigned char val, mask;
1632
1633                 p = tty->index % 4;
1634                 if (cmd == MOXA_SET_OP_MODE) {
1635                         if (get_user(opmode, (int __user *) argp))
1636                                 return -EFAULT;
1637                         if (opmode != RS232_MODE &&
1638                                         opmode != RS485_2WIRE_MODE &&
1639                                         opmode != RS422_MODE &&
1640                                         opmode != RS485_4WIRE_MODE)
1641                                 return -EFAULT;
1642                         mask = ModeMask[p];
1643                         shiftbit = p * 2;
1644                         val = inb(info->opmode_ioaddr);
1645                         val &= mask;
1646                         val |= (opmode << shiftbit);
1647                         outb(val, info->opmode_ioaddr);
1648                 } else {
1649                         shiftbit = p * 2;
1650                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1651                         opmode &= OP_MODE_MASK;
1652                         if (copy_to_user(argp, &opmode, sizeof(int)))
1653                                 return -EFAULT;
1654                 }
1655                 return 0;
1656         }
1657
1658         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1659                         test_bit(TTY_IO_ERROR, &tty->flags))
1660                 return -EIO;
1661
1662         switch (cmd) {
1663         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1664                 retval = tty_check_change(tty);
1665                 if (retval)
1666                         return retval;
1667                 tty_wait_until_sent(tty, 0);
1668                 if (!arg)
1669                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1670                 return 0;
1671         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1672                 retval = tty_check_change(tty);
1673                 if (retval)
1674                         return retval;
1675                 tty_wait_until_sent(tty, 0);
1676                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1677                 return 0;
1678         case TIOCGSOFTCAR:
1679                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1680         case TIOCSSOFTCAR:
1681                 if (get_user(templ, (unsigned long __user *) argp))
1682                         return -EFAULT;
1683                 arg = templ;
1684                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1685                 return 0;
1686         case TIOCGSERIAL:
1687                 return mxser_get_serial_info(info, argp);
1688         case TIOCSSERIAL:
1689                 return mxser_set_serial_info(info, argp);
1690         case TIOCSERGETLSR:     /* Get line status register */
1691                 return mxser_get_lsr_info(info, argp);
1692                 /*
1693                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1694                  * - mask passed in arg for lines of interest
1695                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1696                  * Caller should use TIOCGICOUNT to see which one it was
1697                  */
1698         case TIOCMIWAIT:
1699                 spin_lock_irqsave(&info->slock, flags);
1700                 cnow = info->icount;    /* note the counters on entry */
1701                 spin_unlock_irqrestore(&info->slock, flags);
1702
1703                 wait_event_interruptible(info->delta_msr_wait, ({
1704                         cprev = cnow;
1705                         spin_lock_irqsave(&info->slock, flags);
1706                         cnow = info->icount;    /* atomic copy */
1707                         spin_unlock_irqrestore(&info->slock, flags);
1708
1709                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1710                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1711                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1712                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1713                 }));
1714                 break;
1715         /*
1716          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1717          * Return: write counters to the user passed counter struct
1718          * NB: both 1->0 and 0->1 transitions are counted except for
1719          *     RI where only 0->1 is counted.
1720          */
1721         case TIOCGICOUNT:
1722                 spin_lock_irqsave(&info->slock, flags);
1723                 cnow = info->icount;
1724                 spin_unlock_irqrestore(&info->slock, flags);
1725                 p_cuser = argp;
1726                 if (put_user(cnow.frame, &p_cuser->frame))
1727                         return -EFAULT;
1728                 if (put_user(cnow.brk, &p_cuser->brk))
1729                         return -EFAULT;
1730                 if (put_user(cnow.overrun, &p_cuser->overrun))
1731                         return -EFAULT;
1732                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1733                         return -EFAULT;
1734                 if (put_user(cnow.parity, &p_cuser->parity))
1735                         return -EFAULT;
1736                 if (put_user(cnow.rx, &p_cuser->rx))
1737                         return -EFAULT;
1738                 if (put_user(cnow.tx, &p_cuser->tx))
1739                         return -EFAULT;
1740                 put_user(cnow.cts, &p_cuser->cts);
1741                 put_user(cnow.dsr, &p_cuser->dsr);
1742                 put_user(cnow.rng, &p_cuser->rng);
1743                 put_user(cnow.dcd, &p_cuser->dcd);
1744                 return 0;
1745         case MOXA_HighSpeedOn:
1746                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1747         case MOXA_SDS_RSTICOUNTER:
1748                 info->mon_data.rxcnt = 0;
1749                 info->mon_data.txcnt = 0;
1750                 return 0;
1751
1752         case MOXA_ASPP_OQUEUE:{
1753                 int len, lsr;
1754
1755                 len = mxser_chars_in_buffer(tty);
1756
1757                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1758
1759                 len += (lsr ? 0 : 1);
1760
1761                 if (copy_to_user(argp, &len, sizeof(int)))
1762                         return -EFAULT;
1763
1764                 return 0;
1765         }
1766         case MOXA_ASPP_MON: {
1767                 int mcr, status;
1768
1769                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1770                 mxser_check_modem_status(info, status);
1771
1772                 mcr = inb(info->ioaddr + UART_MCR);
1773                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1774                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1775                 else
1776                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1777
1778                 if (mcr & MOXA_MUST_MCR_TX_XON)
1779                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1780                 else
1781                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1782
1783                 if (info->tty->hw_stopped)
1784                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1785                 else
1786                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1787
1788                 if (copy_to_user(argp, &info->mon_data,
1789                                 sizeof(struct mxser_mon)))
1790                         return -EFAULT;
1791
1792                 return 0;
1793         }
1794         case MOXA_ASPP_LSTATUS: {
1795                 if (copy_to_user(argp, &info->err_shadow,
1796                                 sizeof(unsigned char)))
1797                         return -EFAULT;
1798
1799                 info->err_shadow = 0;
1800                 return 0;
1801         }
1802         case MOXA_SET_BAUD_METHOD: {
1803                 int method;
1804
1805                 if (get_user(method, (int __user *)argp))
1806                         return -EFAULT;
1807                 mxser_set_baud_method[tty->index] = method;
1808                 if (copy_to_user(argp, &method, sizeof(int)))
1809                         return -EFAULT;
1810
1811                 return 0;
1812         }
1813         default:
1814                 return -ENOIOCTLCMD;
1815         }
1816         return 0;
1817 }
1818
1819 static void mxser_stoprx(struct tty_struct *tty)
1820 {
1821         struct mxser_port *info = tty->driver_data;
1822
1823         info->ldisc_stop_rx = 1;
1824         if (I_IXOFF(tty)) {
1825                 if (info->board->chip_flag) {
1826                         info->IER &= ~MOXA_MUST_RECV_ISR;
1827                         outb(info->IER, info->ioaddr + UART_IER);
1828                 } else {
1829                         info->x_char = STOP_CHAR(tty);
1830                         outb(0, info->ioaddr + UART_IER);
1831                         info->IER |= UART_IER_THRI;
1832                         outb(info->IER, info->ioaddr + UART_IER);
1833                 }
1834         }
1835
1836         if (info->tty->termios->c_cflag & CRTSCTS) {
1837                 info->MCR &= ~UART_MCR_RTS;
1838                 outb(info->MCR, info->ioaddr + UART_MCR);
1839         }
1840 }
1841
1842 /*
1843  * This routine is called by the upper-layer tty layer to signal that
1844  * incoming characters should be throttled.
1845  */
1846 static void mxser_throttle(struct tty_struct *tty)
1847 {
1848         mxser_stoprx(tty);
1849 }
1850
1851 static void mxser_unthrottle(struct tty_struct *tty)
1852 {
1853         struct mxser_port *info = tty->driver_data;
1854
1855         /* startrx */
1856         info->ldisc_stop_rx = 0;
1857         if (I_IXOFF(tty)) {
1858                 if (info->x_char)
1859                         info->x_char = 0;
1860                 else {
1861                         if (info->board->chip_flag) {
1862                                 info->IER |= MOXA_MUST_RECV_ISR;
1863                                 outb(info->IER, info->ioaddr + UART_IER);
1864                         } else {
1865                                 info->x_char = START_CHAR(tty);
1866                                 outb(0, info->ioaddr + UART_IER);
1867                                 info->IER |= UART_IER_THRI;
1868                                 outb(info->IER, info->ioaddr + UART_IER);
1869                         }
1870                 }
1871         }
1872
1873         if (info->tty->termios->c_cflag & CRTSCTS) {
1874                 info->MCR |= UART_MCR_RTS;
1875                 outb(info->MCR, info->ioaddr + UART_MCR);
1876         }
1877 }
1878
1879 /*
1880  * mxser_stop() and mxser_start()
1881  *
1882  * This routines are called before setting or resetting tty->stopped.
1883  * They enable or disable transmitter interrupts, as necessary.
1884  */
1885 static void mxser_stop(struct tty_struct *tty)
1886 {
1887         struct mxser_port *info = tty->driver_data;
1888         unsigned long flags;
1889
1890         spin_lock_irqsave(&info->slock, flags);
1891         if (info->IER & UART_IER_THRI) {
1892                 info->IER &= ~UART_IER_THRI;
1893                 outb(info->IER, info->ioaddr + UART_IER);
1894         }
1895         spin_unlock_irqrestore(&info->slock, flags);
1896 }
1897
1898 static void mxser_start(struct tty_struct *tty)
1899 {
1900         struct mxser_port *info = tty->driver_data;
1901         unsigned long flags;
1902
1903         spin_lock_irqsave(&info->slock, flags);
1904         if (info->xmit_cnt && info->xmit_buf) {
1905                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1906                 info->IER |= UART_IER_THRI;
1907                 outb(info->IER, info->ioaddr + UART_IER);
1908         }
1909         spin_unlock_irqrestore(&info->slock, flags);
1910 }
1911
1912 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1913 {
1914         struct mxser_port *info = tty->driver_data;
1915         unsigned long flags;
1916
1917         spin_lock_irqsave(&info->slock, flags);
1918         mxser_change_speed(info, old_termios);
1919         spin_unlock_irqrestore(&info->slock, flags);
1920
1921         if ((old_termios->c_cflag & CRTSCTS) &&
1922                         !(tty->termios->c_cflag & CRTSCTS)) {
1923                 tty->hw_stopped = 0;
1924                 mxser_start(tty);
1925         }
1926
1927         /* Handle sw stopped */
1928         if ((old_termios->c_iflag & IXON) &&
1929                         !(tty->termios->c_iflag & IXON)) {
1930                 tty->stopped = 0;
1931
1932                 if (info->board->chip_flag) {
1933                         spin_lock_irqsave(&info->slock, flags);
1934                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1935                         spin_unlock_irqrestore(&info->slock, flags);
1936                 }
1937
1938                 mxser_start(tty);
1939         }
1940 }
1941
1942 /*
1943  * mxser_wait_until_sent() --- wait until the transmitter is empty
1944  */
1945 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1946 {
1947         struct mxser_port *info = tty->driver_data;
1948         unsigned long orig_jiffies, char_time;
1949         int lsr;
1950
1951         if (info->type == PORT_UNKNOWN)
1952                 return;
1953
1954         if (info->xmit_fifo_size == 0)
1955                 return;         /* Just in case.... */
1956
1957         orig_jiffies = jiffies;
1958         /*
1959          * Set the check interval to be 1/5 of the estimated time to
1960          * send a single character, and make it at least 1.  The check
1961          * interval should also be less than the timeout.
1962          *
1963          * Note: we have to use pretty tight timings here to satisfy
1964          * the NIST-PCTS.
1965          */
1966         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1967         char_time = char_time / 5;
1968         if (char_time == 0)
1969                 char_time = 1;
1970         if (timeout && timeout < char_time)
1971                 char_time = timeout;
1972         /*
1973          * If the transmitter hasn't cleared in twice the approximate
1974          * amount of time to send the entire FIFO, it probably won't
1975          * ever clear.  This assumes the UART isn't doing flow
1976          * control, which is currently the case.  Hence, if it ever
1977          * takes longer than info->timeout, this is probably due to a
1978          * UART bug of some kind.  So, we clamp the timeout parameter at
1979          * 2*info->timeout.
1980          */
1981         if (!timeout || timeout > 2 * info->timeout)
1982                 timeout = 2 * info->timeout;
1983 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1984         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1985                 timeout, char_time);
1986         printk("jiff=%lu...", jiffies);
1987 #endif
1988         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1989 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1990                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1991 #endif
1992                 schedule_timeout_interruptible(char_time);
1993                 if (signal_pending(current))
1994                         break;
1995                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1996                         break;
1997         }
1998         set_current_state(TASK_RUNNING);
1999
2000 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2001         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2002 #endif
2003 }
2004
2005 /*
2006  * This routine is called by tty_hangup() when a hangup is signaled.
2007  */
2008 static void mxser_hangup(struct tty_struct *tty)
2009 {
2010         struct mxser_port *info = tty->driver_data;
2011
2012         mxser_flush_buffer(tty);
2013         mxser_shutdown(info);
2014         info->event = 0;
2015         info->count = 0;
2016         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2017         info->tty = NULL;
2018         wake_up_interruptible(&info->open_wait);
2019 }
2020
2021 /*
2022  * mxser_rs_break() --- routine which turns the break handling on or off
2023  */
2024 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2025 {
2026         struct mxser_port *info = tty->driver_data;
2027         unsigned long flags;
2028
2029         spin_lock_irqsave(&info->slock, flags);
2030         if (break_state == -1)
2031                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2032                         info->ioaddr + UART_LCR);
2033         else
2034                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2035                         info->ioaddr + UART_LCR);
2036         spin_unlock_irqrestore(&info->slock, flags);
2037 }
2038
2039 static void mxser_receive_chars(struct mxser_port *port, int *status)
2040 {
2041         struct tty_struct *tty = port->tty;
2042         unsigned char ch, gdl;
2043         int ignored = 0;
2044         int cnt = 0;
2045         int recv_room;
2046         int max = 256;
2047
2048         recv_room = tty->receive_room;
2049         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2050                 mxser_stoprx(tty);
2051
2052         if (port->board->chip_flag != MOXA_OTHER_UART) {
2053
2054                 if (*status & UART_LSR_SPECIAL)
2055                         goto intr_old;
2056                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2057                                 (*status & MOXA_MUST_LSR_RERR))
2058                         goto intr_old;
2059                 if (*status & MOXA_MUST_LSR_RERR)
2060                         goto intr_old;
2061
2062                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2063
2064                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2065                         gdl &= MOXA_MUST_GDL_MASK;
2066                 if (gdl >= recv_room) {
2067                         if (!port->ldisc_stop_rx)
2068                                 mxser_stoprx(tty);
2069                 }
2070                 while (gdl--) {
2071                         ch = inb(port->ioaddr + UART_RX);
2072                         tty_insert_flip_char(tty, ch, 0);
2073                         cnt++;
2074                 }
2075                 goto end_intr;
2076         }
2077 intr_old:
2078
2079         do {
2080                 if (max-- < 0)
2081                         break;
2082
2083                 ch = inb(port->ioaddr + UART_RX);
2084                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2085                         outb(0x23, port->ioaddr + UART_FCR);
2086                 *status &= port->read_status_mask;
2087                 if (*status & port->ignore_status_mask) {
2088                         if (++ignored > 100)
2089                                 break;
2090                 } else {
2091                         char flag = 0;
2092                         if (*status & UART_LSR_SPECIAL) {
2093                                 if (*status & UART_LSR_BI) {
2094                                         flag = TTY_BREAK;
2095                                         port->icount.brk++;
2096
2097                                         if (port->flags & ASYNC_SAK)
2098                                                 do_SAK(tty);
2099                                 } else if (*status & UART_LSR_PE) {
2100                                         flag = TTY_PARITY;
2101                                         port->icount.parity++;
2102                                 } else if (*status & UART_LSR_FE) {
2103                                         flag = TTY_FRAME;
2104                                         port->icount.frame++;
2105                                 } else if (*status & UART_LSR_OE) {
2106                                         flag = TTY_OVERRUN;
2107                                         port->icount.overrun++;
2108                                 } else
2109                                         flag = TTY_BREAK;
2110                         }
2111                         tty_insert_flip_char(tty, ch, flag);
2112                         cnt++;
2113                         if (cnt >= recv_room) {
2114                                 if (!port->ldisc_stop_rx)
2115                                         mxser_stoprx(tty);
2116                                 break;
2117                         }
2118
2119                 }
2120
2121                 if (port->board->chip_flag)
2122                         break;
2123
2124                 *status = inb(port->ioaddr + UART_LSR);
2125         } while (*status & UART_LSR_DR);
2126
2127 end_intr:
2128         mxvar_log.rxcnt[port->tty->index] += cnt;
2129         port->mon_data.rxcnt += cnt;
2130         port->mon_data.up_rxcnt += cnt;
2131
2132         /*
2133          * We are called from an interrupt context with &port->slock
2134          * being held. Drop it temporarily in order to prevent
2135          * recursive locking.
2136          */
2137         spin_unlock(&port->slock);
2138         tty_flip_buffer_push(tty);
2139         spin_lock(&port->slock);
2140 }
2141
2142 static void mxser_transmit_chars(struct mxser_port *port)
2143 {
2144         int count, cnt;
2145
2146         if (port->x_char) {
2147                 outb(port->x_char, port->ioaddr + UART_TX);
2148                 port->x_char = 0;
2149                 mxvar_log.txcnt[port->tty->index]++;
2150                 port->mon_data.txcnt++;
2151                 port->mon_data.up_txcnt++;
2152                 port->icount.tx++;
2153                 return;
2154         }
2155
2156         if (port->xmit_buf == NULL)
2157                 return;
2158
2159         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2160                         (port->tty->hw_stopped &&
2161                         (port->type != PORT_16550A) &&
2162                         (!port->board->chip_flag))) {
2163                 port->IER &= ~UART_IER_THRI;
2164                 outb(port->IER, port->ioaddr + UART_IER);
2165                 return;
2166         }
2167
2168         cnt = port->xmit_cnt;
2169         count = port->xmit_fifo_size;
2170         do {
2171                 outb(port->xmit_buf[port->xmit_tail++],
2172                         port->ioaddr + UART_TX);
2173                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2174                 if (--port->xmit_cnt <= 0)
2175                         break;
2176         } while (--count > 0);
2177         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2178
2179         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2180         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2181         port->icount.tx += (cnt - port->xmit_cnt);
2182
2183         if (port->xmit_cnt < WAKEUP_CHARS)
2184                 tty_wakeup(port->tty);
2185
2186         if (port->xmit_cnt <= 0) {
2187                 port->IER &= ~UART_IER_THRI;
2188                 outb(port->IER, port->ioaddr + UART_IER);
2189         }
2190 }
2191
2192 /*
2193  * This is the serial driver's generic interrupt routine
2194  */
2195 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2196 {
2197         int status, iir, i;
2198         struct mxser_board *brd = NULL;
2199         struct mxser_port *port;
2200         int max, irqbits, bits, msr;
2201         unsigned int int_cnt, pass_counter = 0;
2202         int handled = IRQ_NONE;
2203
2204         for (i = 0; i < MXSER_BOARDS; i++)
2205                 if (dev_id == &mxser_boards[i]) {
2206                         brd = dev_id;
2207                         break;
2208                 }
2209
2210         if (i == MXSER_BOARDS)
2211                 goto irq_stop;
2212         if (brd == NULL)
2213                 goto irq_stop;
2214         max = brd->info->nports;
2215         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2216                 irqbits = inb(brd->vector) & brd->vector_mask;
2217                 if (irqbits == brd->vector_mask)
2218                         break;
2219
2220                 handled = IRQ_HANDLED;
2221                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2222                         if (irqbits == brd->vector_mask)
2223                                 break;
2224                         if (bits & irqbits)
2225                                 continue;
2226                         port = &brd->ports[i];
2227
2228                         int_cnt = 0;
2229                         spin_lock(&port->slock);
2230                         do {
2231                                 iir = inb(port->ioaddr + UART_IIR);
2232                                 if (iir & UART_IIR_NO_INT)
2233                                         break;
2234                                 iir &= MOXA_MUST_IIR_MASK;
2235                                 if (!port->tty ||
2236                                                 (port->flags & ASYNC_CLOSING) ||
2237                                                 !(port->flags &
2238                                                         ASYNC_INITIALIZED)) {
2239                                         status = inb(port->ioaddr + UART_LSR);
2240                                         outb(0x27, port->ioaddr + UART_FCR);
2241                                         inb(port->ioaddr + UART_MSR);
2242                                         break;
2243                                 }
2244
2245                                 status = inb(port->ioaddr + UART_LSR);
2246
2247                                 if (status & UART_LSR_PE)
2248                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2249                                 if (status & UART_LSR_FE)
2250                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2251                                 if (status & UART_LSR_OE)
2252                                         port->err_shadow |=
2253                                                 NPPI_NOTIFY_HW_OVERRUN;
2254                                 if (status & UART_LSR_BI)
2255                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2256
2257                                 if (port->board->chip_flag) {
2258                                         if (iir == MOXA_MUST_IIR_GDA ||
2259                                             iir == MOXA_MUST_IIR_RDA ||
2260                                             iir == MOXA_MUST_IIR_RTO ||
2261                                             iir == MOXA_MUST_IIR_LSR)
2262                                                 mxser_receive_chars(port,
2263                                                                 &status);
2264
2265                                 } else {
2266                                         status &= port->read_status_mask;
2267                                         if (status & UART_LSR_DR)
2268                                                 mxser_receive_chars(port,
2269                                                                 &status);
2270                                 }
2271                                 msr = inb(port->ioaddr + UART_MSR);
2272                                 if (msr & UART_MSR_ANY_DELTA)
2273                                         mxser_check_modem_status(port, msr);
2274
2275                                 if (port->board->chip_flag) {
2276                                         if (iir == 0x02 && (status &
2277                                                                 UART_LSR_THRE))
2278                                                 mxser_transmit_chars(port);
2279                                 } else {
2280                                         if (status & UART_LSR_THRE)
2281                                                 mxser_transmit_chars(port);
2282                                 }
2283                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2284                         spin_unlock(&port->slock);
2285                 }
2286         }
2287
2288 irq_stop:
2289         return handled;
2290 }
2291
2292 static const struct tty_operations mxser_ops = {
2293         .open = mxser_open,
2294         .close = mxser_close,
2295         .write = mxser_write,
2296         .put_char = mxser_put_char,
2297         .flush_chars = mxser_flush_chars,
2298         .write_room = mxser_write_room,
2299         .chars_in_buffer = mxser_chars_in_buffer,
2300         .flush_buffer = mxser_flush_buffer,
2301         .ioctl = mxser_ioctl,
2302         .throttle = mxser_throttle,
2303         .unthrottle = mxser_unthrottle,
2304         .set_termios = mxser_set_termios,
2305         .stop = mxser_stop,
2306         .start = mxser_start,
2307         .hangup = mxser_hangup,
2308         .break_ctl = mxser_rs_break,
2309         .wait_until_sent = mxser_wait_until_sent,
2310         .tiocmget = mxser_tiocmget,
2311         .tiocmset = mxser_tiocmset,
2312 };
2313
2314 /*
2315  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2316  */
2317
2318 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2319                 unsigned int irq)
2320 {
2321         if (irq)
2322                 free_irq(brd->irq, brd);
2323         if (pdev != NULL) {     /* PCI */
2324 #ifdef CONFIG_PCI
2325                 pci_release_region(pdev, 2);
2326                 pci_release_region(pdev, 3);
2327 #endif
2328         } else {
2329                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2330                 release_region(brd->vector, 1);
2331         }
2332 }
2333
2334 static int __devinit mxser_initbrd(struct mxser_board *brd,
2335                 struct pci_dev *pdev)
2336 {
2337         struct mxser_port *info;
2338         unsigned int i;
2339         int retval;
2340
2341         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2342
2343         for (i = 0; i < brd->info->nports; i++) {
2344                 info = &brd->ports[i];
2345                 info->board = brd;
2346                 info->stop_rx = 0;
2347                 info->ldisc_stop_rx = 0;
2348
2349                 /* Enhance mode enabled here */
2350                 if (brd->chip_flag != MOXA_OTHER_UART)
2351                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2352
2353                 info->flags = ASYNC_SHARE_IRQ;
2354                 info->type = brd->uart_type;
2355
2356                 process_txrx_fifo(info);
2357
2358                 info->custom_divisor = info->baud_base * 16;
2359                 info->close_delay = 5 * HZ / 10;
2360                 info->closing_wait = 30 * HZ;
2361                 info->normal_termios = mxvar_sdriver->init_termios;
2362                 init_waitqueue_head(&info->open_wait);
2363                 init_waitqueue_head(&info->delta_msr_wait);
2364                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2365                 info->err_shadow = 0;
2366                 spin_lock_init(&info->slock);
2367
2368                 /* before set INT ISR, disable all int */
2369                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2370                         info->ioaddr + UART_IER);
2371         }
2372
2373         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2374                         brd);
2375         if (retval) {
2376                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2377                         "conflict with another device.\n",
2378                         brd->info->name, brd->irq);
2379                 /* We hold resources, we need to release them. */
2380                 mxser_release_res(brd, pdev, 0);
2381         }
2382         return retval;
2383 }
2384
2385 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2386 {
2387         int id, i, bits;
2388         unsigned short regs[16], irq;
2389         unsigned char scratch, scratch2;
2390
2391         brd->chip_flag = MOXA_OTHER_UART;
2392
2393         id = mxser_read_register(cap, regs);
2394         switch (id) {
2395         case C168_ASIC_ID:
2396                 brd->info = &mxser_cards[0];
2397                 break;
2398         case C104_ASIC_ID:
2399                 brd->info = &mxser_cards[1];
2400                 break;
2401         case CI104J_ASIC_ID:
2402                 brd->info = &mxser_cards[2];
2403                 break;
2404         case C102_ASIC_ID:
2405                 brd->info = &mxser_cards[5];
2406                 break;
2407         case CI132_ASIC_ID:
2408                 brd->info = &mxser_cards[6];
2409                 break;
2410         case CI134_ASIC_ID:
2411                 brd->info = &mxser_cards[7];
2412                 break;
2413         default:
2414                 return 0;
2415         }
2416
2417         irq = 0;
2418         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2419            Flag-hack checks if configuration should be read as 2-port here. */
2420         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2421                 irq = regs[9] & 0xF000;
2422                 irq = irq | (irq >> 4);
2423                 if (irq != (regs[9] & 0xFF00))
2424                         return MXSER_ERR_IRQ_CONFLIT;
2425         } else if (brd->info->nports == 4) {
2426                 irq = regs[9] & 0xF000;
2427                 irq = irq | (irq >> 4);
2428                 irq = irq | (irq >> 8);
2429                 if (irq != regs[9])
2430                         return MXSER_ERR_IRQ_CONFLIT;
2431         } else if (brd->info->nports == 8) {
2432                 irq = regs[9] & 0xF000;
2433                 irq = irq | (irq >> 4);
2434                 irq = irq | (irq >> 8);
2435                 if ((irq != regs[9]) || (irq != regs[10]))
2436                         return MXSER_ERR_IRQ_CONFLIT;
2437         }
2438
2439         if (!irq)
2440                 return MXSER_ERR_IRQ;
2441         brd->irq = ((int)(irq & 0xF000) >> 12);
2442         for (i = 0; i < 8; i++)
2443                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2444         if ((regs[12] & 0x80) == 0)
2445                 return MXSER_ERR_VECTOR;
2446         brd->vector = (int)regs[11];    /* interrupt vector */
2447         if (id == 1)
2448                 brd->vector_mask = 0x00FF;
2449         else
2450                 brd->vector_mask = 0x000F;
2451         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2452                 if (regs[12] & bits) {
2453                         brd->ports[i].baud_base = 921600;
2454                         brd->ports[i].max_baud = 921600;
2455                 } else {
2456                         brd->ports[i].baud_base = 115200;
2457                         brd->ports[i].max_baud = 115200;
2458                 }
2459         }
2460         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2461         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2462         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2463         outb(scratch2, cap + UART_LCR);
2464         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2465         scratch = inb(cap + UART_IIR);
2466
2467         if (scratch & 0xC0)
2468                 brd->uart_type = PORT_16550A;
2469         else
2470                 brd->uart_type = PORT_16450;
2471         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2472                         "mxser(IO)"))
2473                 return MXSER_ERR_IOADDR;
2474         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2475                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2476                 return MXSER_ERR_VECTOR;
2477         }
2478         return brd->info->nports;
2479 }
2480
2481 static int __devinit mxser_probe(struct pci_dev *pdev,
2482                 const struct pci_device_id *ent)
2483 {
2484 #ifdef CONFIG_PCI
2485         struct mxser_board *brd;
2486         unsigned int i, j;
2487         unsigned long ioaddress;
2488         int retval = -EINVAL;
2489
2490         for (i = 0; i < MXSER_BOARDS; i++)
2491                 if (mxser_boards[i].info == NULL)
2492                         break;
2493
2494         if (i >= MXSER_BOARDS) {
2495                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2496                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2497                 goto err;
2498         }
2499
2500         brd = &mxser_boards[i];
2501         brd->idx = i * MXSER_PORTS_PER_BOARD;
2502         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2503                 mxser_cards[ent->driver_data].name,
2504                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2505
2506         retval = pci_enable_device(pdev);
2507         if (retval) {
2508                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2509                 goto err;
2510         }
2511
2512         /* io address */
2513         ioaddress = pci_resource_start(pdev, 2);
2514         retval = pci_request_region(pdev, 2, "mxser(IO)");
2515         if (retval)
2516                 goto err;
2517
2518         brd->info = &mxser_cards[ent->driver_data];
2519         for (i = 0; i < brd->info->nports; i++)
2520                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2521
2522         /* vector */
2523         ioaddress = pci_resource_start(pdev, 3);
2524         retval = pci_request_region(pdev, 3, "mxser(vector)");
2525         if (retval)
2526                 goto err_relio;
2527         brd->vector = ioaddress;
2528
2529         /* irq */
2530         brd->irq = pdev->irq;
2531
2532         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2533         brd->uart_type = PORT_16550A;
2534         brd->vector_mask = 0;
2535
2536         for (i = 0; i < brd->info->nports; i++) {
2537                 for (j = 0; j < UART_INFO_NUM; j++) {
2538                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2539                                 brd->ports[i].max_baud =
2540                                         Gpci_uart_info[j].max_baud;
2541
2542                                 /* exception....CP-102 */
2543                                 if (brd->info->flags & MXSER_HIGHBAUD)
2544                                         brd->ports[i].max_baud = 921600;
2545                                 break;
2546                         }
2547                 }
2548         }
2549
2550         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2551                 for (i = 0; i < brd->info->nports; i++) {
2552                         if (i < 4)
2553                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2554                         else
2555                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2556                 }
2557                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2558                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2559         }
2560
2561         for (i = 0; i < brd->info->nports; i++) {
2562                 brd->vector_mask |= (1 << i);
2563                 brd->ports[i].baud_base = 921600;
2564         }
2565
2566         /* mxser_initbrd will hook ISR. */
2567         retval = mxser_initbrd(brd, pdev);
2568         if (retval)
2569                 goto err_null;
2570
2571         for (i = 0; i < brd->info->nports; i++)
2572                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2573
2574         pci_set_drvdata(pdev, brd);
2575
2576         return 0;
2577 err_relio:
2578         pci_release_region(pdev, 2);
2579 err_null:
2580         brd->info = NULL;
2581 err:
2582         return retval;
2583 #else
2584         return -ENODEV;
2585 #endif
2586 }
2587
2588 static void __devexit mxser_remove(struct pci_dev *pdev)
2589 {
2590         struct mxser_board *brd = pci_get_drvdata(pdev);
2591         unsigned int i;
2592
2593         for (i = 0; i < brd->info->nports; i++)
2594                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2595
2596         mxser_release_res(brd, pdev, 1);
2597         brd->info = NULL;
2598 }
2599
2600 static struct pci_driver mxser_driver = {
2601         .name = "mxser",
2602         .id_table = mxser_pcibrds,
2603         .probe = mxser_probe,
2604         .remove = __devexit_p(mxser_remove)
2605 };
2606
2607 static int __init mxser_module_init(void)
2608 {
2609         struct mxser_board *brd;
2610         unsigned long cap;
2611         unsigned int i, m, isaloop;
2612         int retval, b;
2613
2614         pr_debug("Loading module mxser ...\n");
2615
2616         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2617         if (!mxvar_sdriver)
2618                 return -ENOMEM;
2619
2620         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2621                 MXSER_VERSION);
2622
2623         /* Initialize the tty_driver structure */
2624         mxvar_sdriver->owner = THIS_MODULE;
2625         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2626         mxvar_sdriver->name = "ttyMI";
2627         mxvar_sdriver->major = ttymajor;
2628         mxvar_sdriver->minor_start = 0;
2629         mxvar_sdriver->num = MXSER_PORTS + 1;
2630         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2631         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2632         mxvar_sdriver->init_termios = tty_std_termios;
2633         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2634         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2635         tty_set_operations(mxvar_sdriver, &mxser_ops);
2636
2637         retval = tty_register_driver(mxvar_sdriver);
2638         if (retval) {
2639                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2640                                 "tty driver !\n");
2641                 goto err_put;
2642         }
2643
2644         mxvar_diagflag = 0;
2645
2646         m = 0;
2647         /* Start finding ISA boards here */
2648         for (isaloop = 0; isaloop < 2; isaloop++)
2649                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2650                         if (!isaloop)
2651                                 cap = mxserBoardCAP[b]; /* predefined */
2652                         else
2653                                 cap = ioaddr[b]; /* module param */
2654
2655                         if (!cap)
2656                                 continue;
2657
2658                         brd = &mxser_boards[m];
2659                         retval = mxser_get_ISA_conf(cap, brd);
2660
2661                         if (retval != 0)
2662                                 printk(KERN_INFO "Found MOXA %s board "
2663                                         "(CAP=0x%x)\n",
2664                                         brd->info->name, ioaddr[b]);
2665
2666                         if (retval <= 0) {
2667                                 if (retval == MXSER_ERR_IRQ)
2668                                         printk(KERN_ERR "Invalid interrupt "
2669                                                 "number, board not "
2670                                                 "configured\n");
2671                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2672                                         printk(KERN_ERR "Invalid interrupt "
2673                                                 "number, board not "
2674                                                 "configured\n");
2675                                 else if (retval == MXSER_ERR_VECTOR)
2676                                         printk(KERN_ERR "Invalid interrupt "
2677                                                 "vector, board not "
2678                                                 "configured\n");
2679                                 else if (retval == MXSER_ERR_IOADDR)
2680                                         printk(KERN_ERR "Invalid I/O address, "
2681                                                 "board not configured\n");
2682
2683                                 brd->info = NULL;
2684                                 continue;
2685                         }
2686
2687                         /* mxser_initbrd will hook ISR. */
2688                         if (mxser_initbrd(brd, NULL) < 0) {
2689                                 brd->info = NULL;
2690                                 continue;
2691                         }
2692
2693                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2694                         for (i = 0; i < brd->info->nports; i++)
2695                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2696                                                 NULL);
2697
2698                         m++;
2699                 }
2700
2701         retval = pci_register_driver(&mxser_driver);
2702         if (retval) {
2703                 printk(KERN_ERR "Can't register pci driver\n");
2704                 if (!m) {
2705                         retval = -ENODEV;
2706                         goto err_unr;
2707                 } /* else: we have some ISA cards under control */
2708         }
2709
2710         pr_debug("Done.\n");
2711
2712         return 0;
2713 err_unr:
2714         tty_unregister_driver(mxvar_sdriver);
2715 err_put:
2716         put_tty_driver(mxvar_sdriver);
2717         return retval;
2718 }
2719
2720 static void __exit mxser_module_exit(void)
2721 {
2722         unsigned int i, j;
2723
2724         pr_debug("Unloading module mxser ...\n");
2725
2726         pci_unregister_driver(&mxser_driver);
2727
2728         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2729                 if (mxser_boards[i].info != NULL)
2730                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2731                                 tty_unregister_device(mxvar_sdriver,
2732                                                 mxser_boards[i].idx + j);
2733         tty_unregister_driver(mxvar_sdriver);
2734         put_tty_driver(mxvar_sdriver);
2735
2736         for (i = 0; i < MXSER_BOARDS; i++)
2737                 if (mxser_boards[i].info != NULL)
2738                         mxser_release_res(&mxser_boards[i], NULL, 1);
2739
2740         pr_debug("Done.\n");
2741 }
2742
2743 module_init(mxser_module_init);
2744 module_exit(mxser_module_exit);