git.oblomov.eu Git - linux-2.6/blob - 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       Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  18  *      - Fixed x86_64 cleanness
  19  *      - Fixed sleep with spinlock held in mxser_send_break
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/autoconf.h>
  24 #include <linux/errno.h>
  25 #include <linux/signal.h>
  26 #include <linux/sched.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serial_reg.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/gfp.h>
  38 #include <linux/ioport.h>
  39 #include <linux/mm.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/delay.h>
  42 #include <linux/pci.h>
  43
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/bitops.h>
  48 #include <asm/uaccess.h>
  49
  50 #include "mxser_new.h"
  51
  52 #define MXSER_VERSION   "2.0"
  53 #define MXSERMAJOR       174
  54 #define MXSERCUMAJOR     175
  55
  56 #define MXSER_EVENT_TXLOW       1
  57
  58 #define MXSER_BOARDS            4       /* Max. boards */
  59 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  60 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  61 #define MXSER_ISR_PASS_LIMIT    99999L
  62
  63 #define MXSER_ERR_IOADDR        -1
  64 #define MXSER_ERR_IRQ           -2
  65 #define MXSER_ERR_IRQ_CONFLIT   -3
  66 #define MXSER_ERR_VECTOR        -4
  67
  68 #define WAKEUP_CHARS            256
  69
  70 #define UART_MCR_AFE            0x20
  71 #define UART_LSR_SPECIAL        0x1E
  72
  73 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  74                                           IXON|IXOFF))
  75
  76 #define C168_ASIC_ID    1
  77 #define C104_ASIC_ID    2
  78 #define C102_ASIC_ID    0xB
  79 #define CI132_ASIC_ID   4
  80 #define CI134_ASIC_ID   3
  81 #define CI104J_ASIC_ID  5
  82
  83 #define MXSER_HIGHBAUD  1
  84 #define MXSER_HAS2      2
  85
  86 /* This is only for PCI */
  87 static const struct {
  88         int type;
  89         int tx_fifo;
  90         int rx_fifo;
  91         int xmit_fifo_size;
  92         int rx_high_water;
  93         int rx_trigger;
  94         int rx_low_water;
  95         long max_baud;
  96 } Gpci_uart_info[] = {
  97         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
  98         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
  99         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 100 };
 101 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 102
 103 struct mxser_cardinfo {
 104         unsigned int nports;
 105         char *name;
 106         unsigned int flags;
 107 };
 108
 109 static const struct mxser_cardinfo mxser_cards[] = {
 110         { 8, "C168 series", },                  /* C168-ISA */
 111         { 4, "C104 series", },                  /* C104-ISA */
 112         { 4, "CI-104J series", },               /* CI104J */
 113         { 8, "C168H/PCI series", },             /* C168-PCI */
 114         { 4, "C104H/PCI series", },             /* C104-PCI */
 115         { 4, "C102 series", MXSER_HAS2 },       /* C102-ISA */
 116         { 4, "CI-132 series", MXSER_HAS2 },     /* CI132 */
 117         { 4, "CI-134 series", },                /* CI134 */
 118         { 2, "CP-132 series", },                /* CP132 */
 119         { 4, "CP-114 series", },                /* CP114 */
 120         { 4, "CT-114 series", },                /* CT114 */
 121         { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
 122         { 4, "CP-104U series", },               /* CP104U */
 123         { 8, "CP-168U series", },               /* CP168U */
 124         { 2, "CP-132U series", },               /* CP132U */
 125         { 4, "CP-134U series", },               /* CP134U */
 126         { 4, "CP-104JU series", },              /* CP104JU */
 127         { 8, "Moxa UC7000 Serial", },           /* RC7000 */
 128         { 8, "CP-118U series", },               /* CP118U */
 129         { 2, "CP-102UL series", },              /* CP102UL */
 130         { 2, "CP-102U series", },               /* CP102U */
 131         { 8, "CP-118EL series", },              /* CP118EL */
 132         { 8, "CP-168EL series", },              /* CP168EL */
 133         { 4, "CP-104EL series", }               /* CP104EL */
 134 };
 135
 136 /* driver_data correspond to the lines in the structure above
 137    see also ISA probe function before you change something */
 138 static struct pci_device_id mxser_pcibrds[] = {
 139         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
 140                 .driver_data = 3 },
 141         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
 142                 .driver_data = 4 },
 143         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
 144                 .driver_data = 8 },
 145         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
 146                 .driver_data = 9 },
 147         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
 148                 .driver_data = 10 },
 149         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
 150                 .driver_data = 11 },
 151         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
 152                 .driver_data = 12 },
 153         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
 154                 .driver_data = 13 },
 155         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
 156                 .driver_data = 14 },
 157         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
 158                 .driver_data = 15 },
 159         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
 160                 .driver_data = 16 },
 161         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
 162                 .driver_data = 17 },
 163         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
 164                 .driver_data = 18 },
 165         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
 166                 .driver_data = 19 },
 167         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
 168                 .driver_data = 20 },
 169         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
 170                 .driver_data = 21 },
 171         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
 172                 .driver_data = 22 },
 173         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
 174                 .driver_data = 23 },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 178
 179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 180 static int ttymajor = MXSERMAJOR;
 181 static int calloutmajor = MXSERCUMAJOR;
 182
 183 /* Variables for insmod */
 184
 185 MODULE_AUTHOR("Casper Yang");
 186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 187 module_param_array(ioaddr, int, NULL, 0);
 188 module_param(ttymajor, int, 0);
 189 MODULE_LICENSE("GPL");
 190
 191 struct mxser_log {
 192         int tick;
 193         unsigned long rxcnt[MXSER_PORTS];
 194         unsigned long txcnt[MXSER_PORTS];
 195 };
 196
 197
 198 struct mxser_mon {
 199         unsigned long rxcnt;
 200         unsigned long txcnt;
 201         unsigned long up_rxcnt;
 202         unsigned long up_txcnt;
 203         int modem_status;
 204         unsigned char hold_reason;
 205 };
 206
 207 struct mxser_mon_ext {
 208         unsigned long rx_cnt[32];
 209         unsigned long tx_cnt[32];
 210         unsigned long up_rxcnt[32];
 211         unsigned long up_txcnt[32];
 212         int modem_status[32];
 213
 214         long baudrate[32];
 215         int databits[32];
 216         int stopbits[32];
 217         int parity[32];
 218         int flowctrl[32];
 219         int fifo[32];
 220         int iftype[32];
 221 };
 222
 223 struct mxser_board;
 224
 225 struct mxser_port {
 226         struct mxser_board *board;
 227         struct tty_struct *tty;
 228
 229         unsigned long ioaddr;
 230         unsigned long opmode_ioaddr;
 231         int max_baud;
 232
 233         int rx_high_water;
 234         int rx_trigger;         /* Rx fifo trigger level */
 235         int rx_low_water;
 236         int baud_base;          /* max. speed */
 237         long realbaud;
 238         int type;               /* UART type */
 239         int flags;              /* defined in tty.h */
 240         long session;           /* Session of opening process */
 241         long pgrp;              /* pgrp of opening process */
 242
 243         int x_char;             /* xon/xoff character */
 244         int IER;                /* Interrupt Enable Register */
 245         int MCR;                /* Modem control register */
 246
 247         unsigned char stop_rx;
 248         unsigned char ldisc_stop_rx;
 249
 250         int custom_divisor;
 251         int close_delay;
 252         unsigned short closing_wait;
 253         unsigned char err_shadow;
 254         unsigned long event;
 255
 256         int count;              /* # of fd on device */
 257         int blocked_open;       /* # of blocked opens */
 258         struct async_icount icount; /* kernel counters for 4 input interrupts */
 259         int timeout;
 260
 261         int read_status_mask;
 262         int ignore_status_mask;
 263         int xmit_fifo_size;
 264         unsigned char *xmit_buf;
 265         int xmit_head;
 266         int xmit_tail;
 267         int xmit_cnt;
 268
 269         struct ktermios normal_termios;
 270         struct ktermios callout_termios;
 271
 272         struct mxser_mon mon_data;
 273
 274         spinlock_t slock;
 275         struct work_struct tqueue;
 276         wait_queue_head_t open_wait;
 277         wait_queue_head_t close_wait;
 278         wait_queue_head_t delta_msr_wait;
 279 };
 280
 281 struct mxser_board {
 282         unsigned int idx;
 283         int irq;
 284         const struct mxser_cardinfo *info;
 285         unsigned long vector;
 286         unsigned long vector_mask;
 287
 288         int chip_flag;
 289         int uart_type;
 290
 291         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 292 };
 293
 294 struct mxser_mstatus {
 295         tcflag_t cflag;
 296         int cts;
 297         int dsr;
 298         int ri;
 299         int dcd;
 300 };
 301
 302 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 303
 304 static int mxserBoardCAP[MXSER_BOARDS] = {
 305         0, 0, 0, 0
 306         /*  0x180, 0x280, 0x200, 0x320 */
 307 };
 308
 309 static struct mxser_board mxser_boards[MXSER_BOARDS];
 310 static struct tty_driver *mxvar_sdriver;
 311 static struct mxser_log mxvar_log;
 312 static int mxvar_diagflag;
 313 static unsigned char mxser_msr[MXSER_PORTS + 1];
 314 static struct mxser_mon_ext mon_data_ext;
 315 static int mxser_set_baud_method[MXSER_PORTS + 1];
 316 static spinlock_t gm_lock;
 317
 318 #ifdef CONFIG_PCI
 319 static int CheckIsMoxaMust(int io)
 320 {
 321         u8 oldmcr, hwid;
 322         int i;
 323
 324         outb(0, io + UART_LCR);
 325         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 326         oldmcr = inb(io + UART_MCR);
 327         outb(0, io + UART_MCR);
 328         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 329         if ((hwid = inb(io + UART_MCR)) != 0) {
 330                 outb(oldmcr, io + UART_MCR);
 331                 return MOXA_OTHER_UART;
 332         }
 333
 334         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 335         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 336                 if (hwid == Gpci_uart_info[i].type)
 337                         return (int)hwid;
 338         }
 339         return MOXA_OTHER_UART;
 340 }
 341 #endif
 342
 343 static void process_txrx_fifo(struct mxser_port *info)
 344 {
 345         int i;
 346
 347         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 348                 info->rx_trigger = 1;
 349                 info->rx_high_water = 1;
 350                 info->rx_low_water = 1;
 351                 info->xmit_fifo_size = 1;
 352         } else
 353                 for (i = 0; i < UART_INFO_NUM; i++)
 354                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 355                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 356                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 357                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 358                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 359                                 break;
 360                         }
 361 }
 362
 363 static void mxser_do_softint(struct work_struct *work)
 364 {
 365         struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
 366         struct tty_struct *tty = info->tty;
 367
 368         if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 369                 tty_wakeup(tty);
 370 }
 371
 372 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 373 {
 374         unsigned char status = 0;
 375
 376         status = inb(baseaddr + UART_MSR);
 377
 378         mxser_msr[port] &= 0x0F;
 379         mxser_msr[port] |= status;
 380         status = mxser_msr[port];
 381         if (mode)
 382                 mxser_msr[port] = 0;
 383
 384         return status;
 385 }
 386
 387 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 388                 struct mxser_port *port)
 389 {
 390         DECLARE_WAITQUEUE(wait, current);
 391         int retval;
 392         int do_clocal = 0;
 393         unsigned long flags;
 394
 395         /*
 396          * If non-blocking mode is set, or the port is not enabled,
 397          * then make the check up front and then exit.
 398          */
 399         if ((filp->f_flags & O_NONBLOCK) ||
 400                         test_bit(TTY_IO_ERROR, &tty->flags)) {
 401                 port->flags |= ASYNC_NORMAL_ACTIVE;
 402                 return 0;
 403         }
 404
 405         if (tty->termios->c_cflag & CLOCAL)
 406                 do_clocal = 1;
 407
 408         /*
 409          * Block waiting for the carrier detect and the line to become
 410          * free (i.e., not in use by the callout).  While we are in
 411          * this loop, port->count is dropped by one, so that
 412          * mxser_close() knows when to free things.  We restore it upon
 413          * exit, either normal or abnormal.
 414          */
 415         retval = 0;
 416         add_wait_queue(&port->open_wait, &wait);
 417
 418         spin_lock_irqsave(&port->slock, flags);
 419         if (!tty_hung_up_p(filp))
 420                 port->count--;
 421         spin_unlock_irqrestore(&port->slock, flags);
 422         port->blocked_open++;
 423         while (1) {
 424                 spin_lock_irqsave(&port->slock, flags);
 425                 outb(inb(port->ioaddr + UART_MCR) |
 426                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 427                 spin_unlock_irqrestore(&port->slock, flags);
 428                 set_current_state(TASK_INTERRUPTIBLE);
 429                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
 430                         if (port->flags & ASYNC_HUP_NOTIFY)
 431                                 retval = -EAGAIN;
 432                         else
 433                                 retval = -ERESTARTSYS;
 434                         break;
 435                 }
 436                 if (!(port->flags & ASYNC_CLOSING) &&
 437                                 (do_clocal ||
 438                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 439                         break;
 440                 if (signal_pending(current)) {
 441                         retval = -ERESTARTSYS;
 442                         break;
 443                 }
 444                 schedule();
 445         }
 446         set_current_state(TASK_RUNNING);
 447         remove_wait_queue(&port->open_wait, &wait);
 448         if (!tty_hung_up_p(filp))
 449                 port->count++;
 450         port->blocked_open--;
 451         if (retval)
 452                 return retval;
 453         port->flags |= ASYNC_NORMAL_ACTIVE;
 454         return 0;
 455 }
 456
 457 static int mxser_set_baud(struct mxser_port *info, long newspd)
 458 {
 459         int quot = 0;
 460         unsigned char cval;
 461         int ret = 0;
 462         unsigned long flags;
 463
 464         if (!info->tty || !info->tty->termios)
 465                 return ret;
 466
 467         if (!(info->ioaddr))
 468                 return ret;
 469
 470         if (newspd > info->max_baud)
 471                 return 0;
 472
 473         info->realbaud = newspd;
 474         if (newspd == 134) {
 475                 quot = (2 * info->baud_base / 269);
 476         } else if (newspd) {
 477                 quot = info->baud_base / newspd;
 478                 if (quot == 0)
 479                         quot = 1;
 480         } else {
 481                 quot = 0;
 482         }
 483
 484         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 485         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 486
 487         if (quot) {
 488                 spin_lock_irqsave(&info->slock, flags);
 489                 info->MCR |= UART_MCR_DTR;
 490                 outb(info->MCR, info->ioaddr + UART_MCR);
 491                 spin_unlock_irqrestore(&info->slock, flags);
 492         } else {
 493                 spin_lock_irqsave(&info->slock, flags);
 494                 info->MCR &= ~UART_MCR_DTR;
 495                 outb(info->MCR, info->ioaddr + UART_MCR);
 496                 spin_unlock_irqrestore(&info->slock, flags);
 497                 return ret;
 498         }
 499
 500         cval = inb(info->ioaddr + UART_LCR);
 501
 502         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 503
 504         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 505         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 506         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 507
 508
 509         return ret;
 510 }
 511
 512 /*
 513  * This routine is called to set the UART divisor registers to match
 514  * the specified baud rate for a serial port.
 515  */
 516 static int mxser_change_speed(struct mxser_port *info,
 517                 struct ktermios *old_termios)
 518 {
 519         unsigned cflag, cval, fcr;
 520         int ret = 0;
 521         unsigned char status;
 522         long baud;
 523         unsigned long flags;
 524
 525         if (!info->tty || !info->tty->termios)
 526                 return ret;
 527         cflag = info->tty->termios->c_cflag;
 528         if (!(info->ioaddr))
 529                 return ret;
 530
 531         if (mxser_set_baud_method[info->tty->index] == 0) {
 532                 baud = tty_get_baud_rate(info->tty);
 533                 mxser_set_baud(info, baud);
 534         }
 535
 536         /* byte size and parity */
 537         switch (cflag & CSIZE) {
 538         case CS5:
 539                 cval = 0x00;
 540                 break;
 541         case CS6:
 542                 cval = 0x01;
 543                 break;
 544         case CS7:
 545                 cval = 0x02;
 546                 break;
 547         case CS8:
 548                 cval = 0x03;
 549                 break;
 550         default:
 551                 cval = 0x00;
 552                 break;          /* too keep GCC shut... */
 553         }
 554         if (cflag & CSTOPB)
 555                 cval |= 0x04;
 556         if (cflag & PARENB)
 557                 cval |= UART_LCR_PARITY;
 558         if (!(cflag & PARODD))
 559                 cval |= UART_LCR_EPAR;
 560         if (cflag & CMSPAR)
 561                 cval |= UART_LCR_SPAR;
 562
 563         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 564                 if (info->board->chip_flag) {
 565                         fcr = UART_FCR_ENABLE_FIFO;
 566                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 567                         SET_MOXA_MUST_FIFO_VALUE(info);
 568                 } else
 569                         fcr = 0;
 570         } else {
 571                 fcr = UART_FCR_ENABLE_FIFO;
 572                 if (info->board->chip_flag) {
 573                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 574                         SET_MOXA_MUST_FIFO_VALUE(info);
 575                 } else {
 576                         switch (info->rx_trigger) {
 577                         case 1:
 578                                 fcr |= UART_FCR_TRIGGER_1;
 579                                 break;
 580                         case 4:
 581                                 fcr |= UART_FCR_TRIGGER_4;
 582                                 break;
 583                         case 8:
 584                                 fcr |= UART_FCR_TRIGGER_8;
 585                                 break;
 586                         default:
 587                                 fcr |= UART_FCR_TRIGGER_14;
 588                                 break;
 589                         }
 590                 }
 591         }
 592
 593         /* CTS flow control flag and modem status interrupts */
 594         info->IER &= ~UART_IER_MSI;
 595         info->MCR &= ~UART_MCR_AFE;
 596         if (cflag & CRTSCTS) {
 597                 info->flags |= ASYNC_CTS_FLOW;
 598                 info->IER |= UART_IER_MSI;
 599                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 600                         info->MCR |= UART_MCR_AFE;
 601                 } else {
 602                         status = inb(info->ioaddr + UART_MSR);
 603                         if (info->tty->hw_stopped) {
 604                                 if (status & UART_MSR_CTS) {
 605                                         info->tty->hw_stopped = 0;
 606                                         if (info->type != PORT_16550A &&
 607                                                         !info->board->chip_flag) {
 608                                                 outb(info->IER & ~UART_IER_THRI,
 609                                                         info->ioaddr +
 610                                                         UART_IER);
 611                                                 info->IER |= UART_IER_THRI;
 612                                                 outb(info->IER, info->ioaddr +
 613                                                                 UART_IER);
 614                                         }
 615                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
 616                                         schedule_work(&info->tqueue);                           }
 617                         } else {
 618                                 if (!(status & UART_MSR_CTS)) {
 619                                         info->tty->hw_stopped = 1;
 620                                         if ((info->type != PORT_16550A) &&
 621                                                         (!info->board->chip_flag)) {
 622                                                 info->IER &= ~UART_IER_THRI;
 623                                                 outb(info->IER, info->ioaddr +
 624                                                                 UART_IER);
 625                                         }
 626                                 }
 627                         }
 628                 }
 629         } else {
 630                 info->flags &= ~ASYNC_CTS_FLOW;
 631         }
 632         outb(info->MCR, info->ioaddr + UART_MCR);
 633         if (cflag & CLOCAL) {
 634                 info->flags &= ~ASYNC_CHECK_CD;
 635         } else {
 636                 info->flags |= ASYNC_CHECK_CD;
 637                 info->IER |= UART_IER_MSI;
 638         }
 639         outb(info->IER, info->ioaddr + UART_IER);
 640
 641         /*
 642          * Set up parity check flag
 643          */
 644         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 645         if (I_INPCK(info->tty))
 646                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 647         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
 648                 info->read_status_mask |= UART_LSR_BI;
 649
 650         info->ignore_status_mask = 0;
 651
 652         if (I_IGNBRK(info->tty)) {
 653                 info->ignore_status_mask |= UART_LSR_BI;
 654                 info->read_status_mask |= UART_LSR_BI;
 655                 /*
 656                  * If we're ignore parity and break indicators, ignore
 657                  * overruns too.  (For real raw support).
 658                  */
 659                 if (I_IGNPAR(info->tty)) {
 660                         info->ignore_status_mask |=
 661                                                 UART_LSR_OE |
 662                                                 UART_LSR_PE |
 663                                                 UART_LSR_FE;
 664                         info->read_status_mask |=
 665                                                 UART_LSR_OE |
 666                                                 UART_LSR_PE |
 667                                                 UART_LSR_FE;
 668                 }
 669         }
 670         if (info->board->chip_flag) {
 671                 spin_lock_irqsave(&info->slock, flags);
 672                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
 673                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
 674                 if (I_IXON(info->tty)) {
 675                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 676                 } else {
 677                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 678                 }
 679                 if (I_IXOFF(info->tty)) {
 680                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 681                 } else {
 682                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 683                 }
 684                 spin_unlock_irqrestore(&info->slock, flags);
 685         }
 686
 687
 688         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 689         outb(cval, info->ioaddr + UART_LCR);
 690
 691         return ret;
 692 }
 693
 694 static void mxser_check_modem_status(struct mxser_port *port, int status)
 695 {
 696         /* update input line counters */
 697         if (status & UART_MSR_TERI)
 698                 port->icount.rng++;
 699         if (status & UART_MSR_DDSR)
 700                 port->icount.dsr++;
 701         if (status & UART_MSR_DDCD)
 702                 port->icount.dcd++;
 703         if (status & UART_MSR_DCTS)
 704                 port->icount.cts++;
 705         port->mon_data.modem_status = status;
 706         wake_up_interruptible(&port->delta_msr_wait);
 707
 708         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 709                 if (status & UART_MSR_DCD)
 710                         wake_up_interruptible(&port->open_wait);
 711                 schedule_work(&port->tqueue);
 712         }
 713
 714         if (port->flags & ASYNC_CTS_FLOW) {
 715                 if (port->tty->hw_stopped) {
 716                         if (status & UART_MSR_CTS) {
 717                                 port->tty->hw_stopped = 0;
 718
 719                                 if ((port->type != PORT_16550A) &&
 720                                                 (!port->board->chip_flag)) {
 721                                         outb(port->IER & ~UART_IER_THRI,
 722                                                 port->ioaddr + UART_IER);
 723                                         port->IER |= UART_IER_THRI;
 724                                         outb(port->IER, port->ioaddr +
 725                                                         UART_IER);
 726                                 }
 727                                 set_bit(MXSER_EVENT_TXLOW, &port->event);
 728                                 schedule_work(&port->tqueue);
 729                         }
 730                 } else {
 731                         if (!(status & UART_MSR_CTS)) {
 732                                 port->tty->hw_stopped = 1;
 733                                 if (port->type != PORT_16550A &&
 734                                                 !port->board->chip_flag) {
 735                                         port->IER &= ~UART_IER_THRI;
 736                                         outb(port->IER, port->ioaddr +
 737                                                         UART_IER);
 738                                 }
 739                         }
 740                 }
 741         }
 742 }
 743
 744 static int mxser_startup(struct mxser_port *info)
 745 {
 746         unsigned long page;
 747         unsigned long flags;
 748
 749         page = __get_free_page(GFP_KERNEL);
 750         if (!page)
 751                 return -ENOMEM;
 752
 753         spin_lock_irqsave(&info->slock, flags);
 754
 755         if (info->flags & ASYNC_INITIALIZED) {
 756                 free_page(page);
 757                 spin_unlock_irqrestore(&info->slock, flags);
 758                 return 0;
 759         }
 760
 761         if (!info->ioaddr || !info->type) {
 762                 if (info->tty)
 763                         set_bit(TTY_IO_ERROR, &info->tty->flags);
 764                 free_page(page);
 765                 spin_unlock_irqrestore(&info->slock, flags);
 766                 return 0;
 767         }
 768         if (info->xmit_buf)
 769                 free_page(page);
 770         else
 771                 info->xmit_buf = (unsigned char *) page;
 772
 773         /*
 774          * Clear the FIFO buffers and disable them
 775          * (they will be reenabled in mxser_change_speed())
 776          */
 777         if (info->board->chip_flag)
 778                 outb((UART_FCR_CLEAR_RCVR |
 779                         UART_FCR_CLEAR_XMIT |
 780                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 781         else
 782                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 783                         info->ioaddr + UART_FCR);
 784
 785         /*
 786          * At this point there's no way the LSR could still be 0xFF;
 787          * if it is, then bail out, because there's likely no UART
 788          * here.
 789          */
 790         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 791                 spin_unlock_irqrestore(&info->slock, flags);
 792                 if (capable(CAP_SYS_ADMIN)) {
 793                         if (info->tty)
 794                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 795                         return 0;
 796                 } else
 797                         return -ENODEV;
 798         }
 799
 800         /*
 801          * Clear the interrupt registers.
 802          */
 803         (void) inb(info->ioaddr + UART_LSR);
 804         (void) inb(info->ioaddr + UART_RX);
 805         (void) inb(info->ioaddr + UART_IIR);
 806         (void) inb(info->ioaddr + UART_MSR);
 807
 808         /*
 809          * Now, initialize the UART
 810          */
 811         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 812         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 813         outb(info->MCR, info->ioaddr + UART_MCR);
 814
 815         /*
 816          * Finally, enable interrupts
 817          */
 818         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 819
 820         if (info->board->chip_flag)
 821                 info->IER |= MOXA_MUST_IER_EGDAI;
 822         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 823
 824         /*
 825          * And clear the interrupt registers again for luck.
 826          */
 827         (void) inb(info->ioaddr + UART_LSR);
 828         (void) inb(info->ioaddr + UART_RX);
 829         (void) inb(info->ioaddr + UART_IIR);
 830         (void) inb(info->ioaddr + UART_MSR);
 831
 832         if (info->tty)
 833                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
 834         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 835
 836         /*
 837          * and set the speed of the serial port
 838          */
 839         spin_unlock_irqrestore(&info->slock, flags);
 840         mxser_change_speed(info, NULL);
 841
 842         info->flags |= ASYNC_INITIALIZED;
 843         return 0;
 844 }
 845
 846 /*
 847  * This routine will shutdown a serial port; interrupts maybe disabled, and
 848  * DTR is dropped if the hangup on close termio flag is on.
 849  */
 850 static void mxser_shutdown(struct mxser_port *info)
 851 {
 852         unsigned long flags;
 853
 854         if (!(info->flags & ASYNC_INITIALIZED))
 855                 return;
 856
 857         spin_lock_irqsave(&info->slock, flags);
 858
 859         /*
 860          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 861          * here so the queue might never be waken up
 862          */
 863         wake_up_interruptible(&info->delta_msr_wait);
 864
 865         /*
 866          * Free the IRQ, if necessary
 867          */
 868         if (info->xmit_buf) {
 869                 free_page((unsigned long) info->xmit_buf);
 870                 info->xmit_buf = NULL;
 871         }
 872
 873         info->IER = 0;
 874         outb(0x00, info->ioaddr + UART_IER);
 875
 876         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
 877                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 878         outb(info->MCR, info->ioaddr + UART_MCR);
 879
 880         /* clear Rx/Tx FIFO's */
 881         if (info->board->chip_flag)
 882                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 883                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 884                                 info->ioaddr + UART_FCR);
 885         else
 886                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 887                         info->ioaddr + UART_FCR);
 888
 889         /* read data port to reset things */
 890         (void) inb(info->ioaddr + UART_RX);
 891
 892         if (info->tty)
 893                 set_bit(TTY_IO_ERROR, &info->tty->flags);
 894
 895         info->flags &= ~ASYNC_INITIALIZED;
 896
 897         if (info->board->chip_flag)
 898                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 899
 900         spin_unlock_irqrestore(&info->slock, flags);
 901 }
 902
 903 /*
 904  * This routine is called whenever a serial port is opened.  It
 905  * enables interrupts for a serial port, linking in its async structure into
 906  * the IRQ chain.   It also performs the serial-specific
 907  * initialization for the tty structure.
 908  */
 909 static int mxser_open(struct tty_struct *tty, struct file *filp)
 910 {
 911         struct mxser_port *info;
 912         int retval, line;
 913
 914         /* initialize driver_data in case something fails */
 915         tty->driver_data = NULL;
 916
 917         line = tty->index;
 918         if (line == MXSER_PORTS)
 919                 return 0;
 920         if (line < 0 || line > MXSER_PORTS)
 921                 return -ENODEV;
 922         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 923         if (!info->ioaddr)
 924                 return -ENODEV;
 925
 926         tty->driver_data = info;
 927         info->tty = tty;
 928         /*
 929          * Start up serial port
 930          */
 931         info->count++;
 932         retval = mxser_startup(info);
 933         if (retval)
 934                 return retval;
 935
 936         retval = mxser_block_til_ready(tty, filp, info);
 937         if (retval)
 938                 return retval;
 939
 940         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 941                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 942                         *tty->termios = info->normal_termios;
 943                 else
 944                         *tty->termios = info->callout_termios;
 945                 mxser_change_speed(info, NULL);
 946         }
 947
 948         info->session = process_session(current);
 949         info->pgrp = process_group(current);
 950
 951         /* unmark here for very high baud rate (ex. 921600 bps) used */
 952         tty->low_latency = 1;
 953         return 0;
 954 }
 955
 956 /*
 957  * This routine is called when the serial port gets closed.  First, we
 958  * wait for the last remaining data to be sent.  Then, we unlink its
 959  * async structure from the interrupt chain if necessary, and we free
 960  * that IRQ if nothing is left in the chain.
 961  */
 962 static void mxser_close(struct tty_struct *tty, struct file *filp)
 963 {
 964         struct mxser_port *info = tty->driver_data;
 965
 966         unsigned long timeout;
 967         unsigned long flags;
 968
 969         if (tty->index == MXSER_PORTS)
 970                 return;
 971         if (!info)
 972                 return;
 973
 974         spin_lock_irqsave(&info->slock, flags);
 975
 976         if (tty_hung_up_p(filp)) {
 977                 spin_unlock_irqrestore(&info->slock, flags);
 978                 return;
 979         }
 980         if ((tty->count == 1) && (info->count != 1)) {
 981                 /*
 982                  * Uh, oh.  tty->count is 1, which means that the tty
 983                  * structure will be freed.  Info->count should always
 984                  * be one in these conditions.  If it's greater than
 985                  * one, we've got real problems, since it means the
 986                  * serial port won't be shutdown.
 987                  */
 988                 printk(KERN_ERR "mxser_close: bad serial port count; "
 989                         "tty->count is 1, info->count is %d\n", info->count);
 990                 info->count = 1;
 991         }
 992         if (--info->count < 0) {
 993                 printk(KERN_ERR "mxser_close: bad serial port count for "
 994                         "ttys%d: %d\n", tty->index, info->count);
 995                 info->count = 0;
 996         }
 997         if (info->count) {
 998                 spin_unlock_irqrestore(&info->slock, flags);
 999                 return;
1000         }
1001         info->flags |= ASYNC_CLOSING;
1002         spin_unlock_irqrestore(&info->slock, flags);
1003         /*
1004          * Save the termios structure, since this port may have
1005          * separate termios for callout and dialin.
1006          */
1007         if (info->flags & ASYNC_NORMAL_ACTIVE)
1008                 info->normal_termios = *tty->termios;
1009         /*
1010          * Now we wait for the transmit buffer to clear; and we notify
1011          * the line discipline to only process XON/XOFF characters.
1012          */
1013         tty->closing = 1;
1014         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1015                 tty_wait_until_sent(tty, info->closing_wait);
1016         /*
1017          * At this point we stop accepting input.  To do this, we
1018          * disable the receive line status interrupts, and tell the
1019          * interrupt driver to stop checking the data ready bit in the
1020          * line status register.
1021          */
1022         info->IER &= ~UART_IER_RLSI;
1023         if (info->board->chip_flag)
1024                 info->IER &= ~MOXA_MUST_RECV_ISR;
1025
1026         if (info->flags & ASYNC_INITIALIZED) {
1027                 outb(info->IER, info->ioaddr + UART_IER);
1028                 /*
1029                  * Before we drop DTR, make sure the UART transmitter
1030                  * has completely drained; this is especially
1031                  * important if there is a transmit FIFO!
1032                  */
1033                 timeout = jiffies + HZ;
1034                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1035                         schedule_timeout_interruptible(5);
1036                         if (time_after(jiffies, timeout))
1037                                 break;
1038                 }
1039         }
1040         mxser_shutdown(info);
1041
1042         if (tty->driver->flush_buffer)
1043                 tty->driver->flush_buffer(tty);
1044
1045         tty_ldisc_flush(tty);
1046
1047         tty->closing = 0;
1048         info->event = 0;
1049         info->tty = NULL;
1050         if (info->blocked_open) {
1051                 if (info->close_delay)
1052                         schedule_timeout_interruptible(info->close_delay);
1053                 wake_up_interruptible(&info->open_wait);
1054         }
1055
1056         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1057         wake_up_interruptible(&info->close_wait);
1058
1059 }
1060
1061 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1062 {
1063         int c, total = 0;
1064         struct mxser_port *info = tty->driver_data;
1065         unsigned long flags;
1066
1067         if (!info->xmit_buf)
1068                 return 0;
1069
1070         while (1) {
1071                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1072                                           SERIAL_XMIT_SIZE - info->xmit_head));
1073                 if (c <= 0)
1074                         break;
1075
1076                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1077                 spin_lock_irqsave(&info->slock, flags);
1078                 info->xmit_head = (info->xmit_head + c) &
1079                                   (SERIAL_XMIT_SIZE - 1);
1080                 info->xmit_cnt += c;
1081                 spin_unlock_irqrestore(&info->slock, flags);
1082
1083                 buf += c;
1084                 count -= c;
1085                 total += c;
1086         }
1087
1088         if (info->xmit_cnt && !tty->stopped) {
1089                 if (!tty->hw_stopped ||
1090                                 (info->type == PORT_16550A) ||
1091                                 (info->board->chip_flag)) {
1092                         spin_lock_irqsave(&info->slock, flags);
1093                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1094                                         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         return total;
1101 }
1102
1103 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1104 {
1105         struct mxser_port *info = tty->driver_data;
1106         unsigned long flags;
1107
1108         if (!info->xmit_buf)
1109                 return;
1110
1111         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1112                 return;
1113
1114         spin_lock_irqsave(&info->slock, flags);
1115         info->xmit_buf[info->xmit_head++] = ch;
1116         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1117         info->xmit_cnt++;
1118         spin_unlock_irqrestore(&info->slock, flags);
1119         if (!tty->stopped) {
1120                 if (!tty->hw_stopped ||
1121                                 (info->type == PORT_16550A) ||
1122                                 info->board->chip_flag) {
1123                         spin_lock_irqsave(&info->slock, flags);
1124                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1125                         info->IER |= UART_IER_THRI;
1126                         outb(info->IER, info->ioaddr + UART_IER);
1127                         spin_unlock_irqrestore(&info->slock, flags);
1128                 }
1129         }
1130 }
1131
1132
1133 static void mxser_flush_chars(struct tty_struct *tty)
1134 {
1135         struct mxser_port *info = tty->driver_data;
1136         unsigned long flags;
1137
1138         if (info->xmit_cnt <= 0 ||
1139                         tty->stopped ||
1140                         !info->xmit_buf ||
1141                         (tty->hw_stopped &&
1142                          (info->type != PORT_16550A) &&
1143                          (!info->board->chip_flag)
1144                         ))
1145                 return;
1146
1147         spin_lock_irqsave(&info->slock, flags);
1148
1149         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1150         info->IER |= UART_IER_THRI;
1151         outb(info->IER, info->ioaddr + UART_IER);
1152
1153         spin_unlock_irqrestore(&info->slock, flags);
1154 }
1155
1156 static int mxser_write_room(struct tty_struct *tty)
1157 {
1158         struct mxser_port *info = tty->driver_data;
1159         int ret;
1160
1161         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1162         if (ret < 0)
1163                 ret = 0;
1164         return ret;
1165 }
1166
1167 static int mxser_chars_in_buffer(struct tty_struct *tty)
1168 {
1169         struct mxser_port *info = tty->driver_data;
1170         return info->xmit_cnt;
1171 }
1172
1173 static void mxser_flush_buffer(struct tty_struct *tty)
1174 {
1175         struct mxser_port *info = tty->driver_data;
1176         char fcr;
1177         unsigned long flags;
1178
1179
1180         spin_lock_irqsave(&info->slock, flags);
1181         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1182
1183         fcr = inb(info->ioaddr + UART_FCR);
1184         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1185                 info->ioaddr + UART_FCR);
1186         outb(fcr, info->ioaddr + UART_FCR);
1187
1188         spin_unlock_irqrestore(&info->slock, flags);
1189
1190         tty_wakeup(tty);
1191 }
1192
1193 /*
1194  * ------------------------------------------------------------
1195  * friends of mxser_ioctl()
1196  * ------------------------------------------------------------
1197  */
1198 static int mxser_get_serial_info(struct mxser_port *info,
1199                 struct serial_struct __user *retinfo)
1200 {
1201         struct serial_struct tmp;
1202
1203         if (!retinfo)
1204                 return -EFAULT;
1205         memset(&tmp, 0, sizeof(tmp));
1206         tmp.type = info->type;
1207         tmp.line = info->tty->index;
1208         tmp.port = info->ioaddr;
1209         tmp.irq = info->board->irq;
1210         tmp.flags = info->flags;
1211         tmp.baud_base = info->baud_base;
1212         tmp.close_delay = info->close_delay;
1213         tmp.closing_wait = info->closing_wait;
1214         tmp.custom_divisor = info->custom_divisor;
1215         tmp.hub6 = 0;
1216         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1217                 return -EFAULT;
1218         return 0;
1219 }
1220
1221 static int mxser_set_serial_info(struct mxser_port *info,
1222                 struct serial_struct __user *new_info)
1223 {
1224         struct serial_struct new_serial;
1225         unsigned int flags;
1226         int retval = 0;
1227
1228         if (!new_info || !info->ioaddr)
1229                 return -EFAULT;
1230         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1231                 return -EFAULT;
1232
1233         if ((new_serial.irq != info->board->irq) ||
1234                         (new_serial.port != info->ioaddr) ||
1235                         (new_serial.custom_divisor != info->custom_divisor) ||
1236                         (new_serial.baud_base != info->baud_base))
1237                 return -EPERM;
1238
1239         flags = info->flags & ASYNC_SPD_MASK;
1240
1241         if (!capable(CAP_SYS_ADMIN)) {
1242                 if ((new_serial.baud_base != info->baud_base) ||
1243                                 (new_serial.close_delay != info->close_delay) ||
1244                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1245                         return -EPERM;
1246                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1247                                 (new_serial.flags & ASYNC_USR_MASK));
1248         } else {
1249                 /*
1250                  * OK, past this point, all the error checking has been done.
1251                  * At this point, we start making changes.....
1252                  */
1253                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1254                                 (new_serial.flags & ASYNC_FLAGS));
1255                 info->close_delay = new_serial.close_delay * HZ / 100;
1256                 info->closing_wait = new_serial.closing_wait * HZ / 100;
1257                 info->tty->low_latency =
1258                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1259                 info->tty->low_latency = 0;
1260         }
1261
1262         info->type = new_serial.type;
1263
1264         process_txrx_fifo(info);
1265
1266         if (info->flags & ASYNC_INITIALIZED) {
1267                 if (flags != (info->flags & ASYNC_SPD_MASK))
1268                         mxser_change_speed(info, NULL);
1269         } else
1270                 retval = mxser_startup(info);
1271
1272         return retval;
1273 }
1274
1275 /*
1276  * mxser_get_lsr_info - get line status register info
1277  *
1278  * Purpose: Let user call ioctl() to get info when the UART physically
1279  *          is emptied.  On bus types like RS485, the transmitter must
1280  *          release the bus after transmitting. This must be done when
1281  *          the transmit shift register is empty, not be done when the
1282  *          transmit holding register is empty.  This functionality
1283  *          allows an RS485 driver to be written in user space.
1284  */
1285 static int mxser_get_lsr_info(struct mxser_port *info,
1286                 unsigned int __user *value)
1287 {
1288         unsigned char status;
1289         unsigned int result;
1290         unsigned long flags;
1291
1292         spin_lock_irqsave(&info->slock, flags);
1293         status = inb(info->ioaddr + UART_LSR);
1294         spin_unlock_irqrestore(&info->slock, flags);
1295         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1296         return put_user(result, value);
1297 }
1298
1299 /*
1300  * This routine sends a break character out the serial port.
1301  */
1302 static void mxser_send_break(struct mxser_port *info, int duration)
1303 {
1304         unsigned long flags;
1305
1306         if (!info->ioaddr)
1307                 return;
1308         set_current_state(TASK_INTERRUPTIBLE);
1309         spin_lock_irqsave(&info->slock, flags);
1310         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1311                 info->ioaddr + UART_LCR);
1312         spin_unlock_irqrestore(&info->slock, flags);
1313         schedule_timeout(duration);
1314         spin_lock_irqsave(&info->slock, flags);
1315         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1316                 info->ioaddr + UART_LCR);
1317         spin_unlock_irqrestore(&info->slock, flags);
1318 }
1319
1320 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1321 {
1322         struct mxser_port *info = tty->driver_data;
1323         unsigned char control, status;
1324         unsigned long flags;
1325
1326
1327         if (tty->index == MXSER_PORTS)
1328                 return -ENOIOCTLCMD;
1329         if (test_bit(TTY_IO_ERROR, &tty->flags))
1330                 return -EIO;
1331
1332         control = info->MCR;
1333
1334         spin_lock_irqsave(&info->slock, flags);
1335         status = inb(info->ioaddr + UART_MSR);
1336         if (status & UART_MSR_ANY_DELTA)
1337                 mxser_check_modem_status(info, status);
1338         spin_unlock_irqrestore(&info->slock, flags);
1339         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1340                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1341                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1342                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1343                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1344                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1345 }
1346
1347 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1348                 unsigned int set, unsigned int clear)
1349 {
1350         struct mxser_port *info = tty->driver_data;
1351         unsigned long flags;
1352
1353
1354         if (tty->index == MXSER_PORTS)
1355                 return -ENOIOCTLCMD;
1356         if (test_bit(TTY_IO_ERROR, &tty->flags))
1357                 return -EIO;
1358
1359         spin_lock_irqsave(&info->slock, flags);
1360
1361         if (set & TIOCM_RTS)
1362                 info->MCR |= UART_MCR_RTS;
1363         if (set & TIOCM_DTR)
1364                 info->MCR |= UART_MCR_DTR;
1365
1366         if (clear & TIOCM_RTS)
1367                 info->MCR &= ~UART_MCR_RTS;
1368         if (clear & TIOCM_DTR)
1369                 info->MCR &= ~UART_MCR_DTR;
1370
1371         outb(info->MCR, info->ioaddr + UART_MCR);
1372         spin_unlock_irqrestore(&info->slock, flags);
1373         return 0;
1374 }
1375
1376 static int mxser_program_mode(int port)
1377 {
1378         int id, i, j, n;
1379
1380         spin_lock(&gm_lock);
1381         outb(0, port);
1382         outb(0, port);
1383         outb(0, port);
1384         (void)inb(port);
1385         (void)inb(port);
1386         outb(0, port);
1387         (void)inb(port);
1388         spin_unlock(&gm_lock);
1389
1390         id = inb(port + 1) & 0x1F;
1391         if ((id != C168_ASIC_ID) &&
1392                         (id != C104_ASIC_ID) &&
1393                         (id != C102_ASIC_ID) &&
1394                         (id != CI132_ASIC_ID) &&
1395                         (id != CI134_ASIC_ID) &&
1396                         (id != CI104J_ASIC_ID))
1397                 return -1;
1398         for (i = 0, j = 0; i < 4; i++) {
1399                 n = inb(port + 2);
1400                 if (n == 'M') {
1401                         j = 1;
1402                 } else if ((j == 1) && (n == 1)) {
1403                         j = 2;
1404                         break;
1405                 } else
1406                         j = 0;
1407         }
1408         if (j != 2)
1409                 id = -2;
1410         return id;
1411 }
1412
1413 static void mxser_normal_mode(int port)
1414 {
1415         int i, n;
1416
1417         outb(0xA5, port + 1);
1418         outb(0x80, port + 3);
1419         outb(12, port + 0);     /* 9600 bps */
1420         outb(0, port + 1);
1421         outb(0x03, port + 3);   /* 8 data bits */
1422         outb(0x13, port + 4);   /* loop back mode */
1423         for (i = 0; i < 16; i++) {
1424                 n = inb(port + 5);
1425                 if ((n & 0x61) == 0x60)
1426                         break;
1427                 if ((n & 1) == 1)
1428                         (void)inb(port);
1429         }
1430         outb(0x00, port + 4);
1431 }
1432
1433 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1434 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1435 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1436 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1437 #define EN_CCMD         0x000   /* Chip's command register     */
1438 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1439 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1440 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1441 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1442 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1443 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1444 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1445 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1446 static int mxser_read_register(int port, unsigned short *regs)
1447 {
1448         int i, k, value, id;
1449         unsigned int j;
1450
1451         id = mxser_program_mode(port);
1452         if (id < 0)
1453                 return id;
1454         for (i = 0; i < 14; i++) {
1455                 k = (i & 0x3F) | 0x180;
1456                 for (j = 0x100; j > 0; j >>= 1) {
1457                         outb(CHIP_CS, port);
1458                         if (k & j) {
1459                                 outb(CHIP_CS | CHIP_DO, port);
1460                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1461                         } else {
1462                                 outb(CHIP_CS, port);
1463                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1464                         }
1465                 }
1466                 (void)inb(port);
1467                 value = 0;
1468                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1469                         outb(CHIP_CS, port);
1470                         outb(CHIP_CS | CHIP_SK, port);
1471                         if (inb(port) & CHIP_DI)
1472                                 value |= j;
1473                 }
1474                 regs[i] = value;
1475                 outb(0, port);
1476         }
1477         mxser_normal_mode(port);
1478         return id;
1479 }
1480
1481 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 {
1483         struct mxser_port *port;
1484         int result, status;
1485         unsigned int i, j;
1486
1487         switch (cmd) {
1488         case MOXA_GET_CONF:
1489 /*              if (copy_to_user(argp, mxsercfg,
1490                                 sizeof(struct mxser_hwconf) * 4))
1491                         return -EFAULT;
1492                 return 0;*/
1493                 return -ENXIO;
1494         case MOXA_GET_MAJOR:
1495                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1496                         return -EFAULT;
1497                 return 0;
1498
1499         case MOXA_GET_CUMAJOR:
1500                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1501                         return -EFAULT;
1502                 return 0;
1503
1504         case MOXA_CHKPORTENABLE:
1505                 result = 0;
1506
1507                 for (i = 0; i < MXSER_BOARDS; i++)
1508                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1509                                 if (mxser_boards[i].ports[j].ioaddr)
1510                                         result |= (1 << i);
1511
1512                 return put_user(result, (unsigned long __user *)argp);
1513         case MOXA_GETDATACOUNT:
1514                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1515                         return -EFAULT;
1516                 return 0;
1517         case MOXA_GETMSTATUS:
1518                 for (i = 0; i < MXSER_BOARDS; i++)
1519                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1520                                 port = &mxser_boards[i].ports[j];
1521
1522                                 GMStatus[i].ri = 0;
1523                                 if (!port->ioaddr) {
1524                                         GMStatus[i].dcd = 0;
1525                                         GMStatus[i].dsr = 0;
1526                                         GMStatus[i].cts = 0;
1527                                         continue;
1528                                 }
1529
1530                                 if (!port->tty || !port->tty->termios)
1531                                         GMStatus[i].cflag =
1532                                                 port->normal_termios.c_cflag;
1533                                 else
1534                                         GMStatus[i].cflag =
1535                                                 port->tty->termios->c_cflag;
1536
1537                                 status = inb(port->ioaddr + UART_MSR);
1538                                 if (status & 0x80 /*UART_MSR_DCD */ )
1539                                         GMStatus[i].dcd = 1;
1540                                 else
1541                                         GMStatus[i].dcd = 0;
1542
1543                                 if (status & 0x20 /*UART_MSR_DSR */ )
1544                                         GMStatus[i].dsr = 1;
1545                                 else
1546                                         GMStatus[i].dsr = 0;
1547
1548
1549                                 if (status & 0x10 /*UART_MSR_CTS */ )
1550                                         GMStatus[i].cts = 1;
1551                                 else
1552                                         GMStatus[i].cts = 0;
1553                         }
1554                 if (copy_to_user(argp, GMStatus,
1555                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1556                         return -EFAULT;
1557                 return 0;
1558         case MOXA_ASPP_MON_EXT: {
1559                 int status, p, shiftbit;
1560                 unsigned long opmode;
1561                 unsigned cflag, iflag;
1562
1563                 for (i = 0; i < MXSER_BOARDS; i++)
1564                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1565                                 port = &mxser_boards[i].ports[j];
1566                                 if (!port->ioaddr)
1567                                         continue;
1568
1569                                 status = mxser_get_msr(port->ioaddr, 0, i);
1570
1571                                 if (status & UART_MSR_TERI)
1572                                         port->icount.rng++;
1573                                 if (status & UART_MSR_DDSR)
1574                                         port->icount.dsr++;
1575                                 if (status & UART_MSR_DDCD)
1576                                         port->icount.dcd++;
1577                                 if (status & UART_MSR_DCTS)
1578                                         port->icount.cts++;
1579
1580                                 port->mon_data.modem_status = status;
1581                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1582                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1583                                 mon_data_ext.up_rxcnt[i] =
1584                                         port->mon_data.up_rxcnt;
1585                                 mon_data_ext.up_txcnt[i] =
1586                                         port->mon_data.up_txcnt;
1587                                 mon_data_ext.modem_status[i] =
1588                                         port->mon_data.modem_status;
1589                                 mon_data_ext.baudrate[i] = port->realbaud;
1590
1591                                 if (!port->tty || !port->tty->termios) {
1592                                         cflag = port->normal_termios.c_cflag;
1593                                         iflag = port->normal_termios.c_iflag;
1594                                 } else {
1595                                         cflag = port->tty->termios->c_cflag;
1596                                         iflag = port->tty->termios->c_iflag;
1597                                 }
1598
1599                                 mon_data_ext.databits[i] = cflag & CSIZE;
1600
1601                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1602
1603                                 mon_data_ext.parity[i] =
1604                                         cflag & (PARENB | PARODD | CMSPAR);
1605
1606                                 mon_data_ext.flowctrl[i] = 0x00;
1607
1608                                 if (cflag & CRTSCTS)
1609                                         mon_data_ext.flowctrl[i] |= 0x03;
1610
1611                                 if (iflag & (IXON | IXOFF))
1612                                         mon_data_ext.flowctrl[i] |= 0x0C;
1613
1614                                 if (port->type == PORT_16550A)
1615                                         mon_data_ext.fifo[i] = 1;
1616                                 else
1617                                         mon_data_ext.fifo[i] = 0;
1618
1619                                 p = i % 4;
1620                                 shiftbit = p * 2;
1621                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1622                                 opmode &= OP_MODE_MASK;
1623
1624                                 mon_data_ext.iftype[i] = opmode;
1625
1626                         }
1627                         if (copy_to_user(argp, &mon_data_ext,
1628                                                 sizeof(mon_data_ext)))
1629                                 return -EFAULT;
1630
1631                         return 0;
1632
1633         } default:
1634                 return -ENOIOCTLCMD;
1635         }
1636         return 0;
1637 }
1638
1639 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1640                 unsigned int cmd, unsigned long arg)
1641 {
1642         struct mxser_port *info = tty->driver_data;
1643         struct async_icount cprev, cnow;        /* kernel counter temps */
1644         struct serial_icounter_struct __user *p_cuser;
1645         unsigned long templ;
1646         unsigned long flags;
1647         void __user *argp = (void __user *)arg;
1648         int retval;
1649
1650         if (tty->index == MXSER_PORTS)
1651                 return mxser_ioctl_special(cmd, argp);
1652
1653         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1654                 int p;
1655                 unsigned long opmode;
1656                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1657                 int shiftbit;
1658                 unsigned char val, mask;
1659
1660                 p = tty->index % 4;
1661                 if (cmd == MOXA_SET_OP_MODE) {
1662                         if (get_user(opmode, (int __user *) argp))
1663                                 return -EFAULT;
1664                         if (opmode != RS232_MODE &&
1665                                         opmode != RS485_2WIRE_MODE &&
1666                                         opmode != RS422_MODE &&
1667                                         opmode != RS485_4WIRE_MODE)
1668                                 return -EFAULT;
1669                         mask = ModeMask[p];
1670                         shiftbit = p * 2;
1671                         val = inb(info->opmode_ioaddr);
1672                         val &= mask;
1673                         val |= (opmode << shiftbit);
1674                         outb(val, info->opmode_ioaddr);
1675                 } else {
1676                         shiftbit = p * 2;
1677                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1678                         opmode &= OP_MODE_MASK;
1679                         if (copy_to_user(argp, &opmode, sizeof(int)))
1680                                 return -EFAULT;
1681                 }
1682                 return 0;
1683         }
1684
1685         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1686                         test_bit(TTY_IO_ERROR, &tty->flags))
1687                 return -EIO;
1688
1689         switch (cmd) {
1690         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1691                 retval = tty_check_change(tty);
1692                 if (retval)
1693                         return retval;
1694                 tty_wait_until_sent(tty, 0);
1695                 if (!arg)
1696                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1697                 return 0;
1698         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1699                 retval = tty_check_change(tty);
1700                 if (retval)
1701                         return retval;
1702                 tty_wait_until_sent(tty, 0);
1703                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1704                 return 0;
1705         case TIOCGSOFTCAR:
1706                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1707         case TIOCSSOFTCAR:
1708                 if (get_user(templ, (unsigned long __user *) argp))
1709                         return -EFAULT;
1710                 arg = templ;
1711                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1712                 return 0;
1713         case TIOCGSERIAL:
1714                 return mxser_get_serial_info(info, argp);
1715         case TIOCSSERIAL:
1716                 return mxser_set_serial_info(info, argp);
1717         case TIOCSERGETLSR:     /* Get line status register */
1718                 return mxser_get_lsr_info(info, argp);
1719                 /*
1720                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1721                  * - mask passed in arg for lines of interest
1722                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1723                  * Caller should use TIOCGICOUNT to see which one it was
1724                  */
1725         case TIOCMIWAIT: {
1726                 DECLARE_WAITQUEUE(wait, current);
1727                 int ret;
1728                 spin_lock_irqsave(&info->slock, flags);
1729                 cprev = info->icount;   /* note the counters on entry */
1730                 spin_unlock_irqrestore(&info->slock, flags);
1731
1732                 add_wait_queue(&info->delta_msr_wait, &wait);
1733                 while (1) {
1734                         spin_lock_irqsave(&info->slock, flags);
1735                         cnow = info->icount;    /* atomic copy */
1736                         spin_unlock_irqrestore(&info->slock, flags);
1737
1738                         set_current_state(TASK_INTERRUPTIBLE);
1739                         if (((arg & TIOCM_RNG) &&
1740                                         (cnow.rng != cprev.rng)) ||
1741                                         ((arg & TIOCM_DSR) &&
1742                                         (cnow.dsr != cprev.dsr)) ||
1743                                         ((arg & TIOCM_CD) &&
1744                                         (cnow.dcd != cprev.dcd)) ||
1745                                         ((arg & TIOCM_CTS) &&
1746                                         (cnow.cts != cprev.cts))) {
1747                                 ret = 0;
1748                                 break;
1749                         }
1750                         /* see if a signal did it */
1751                         if (signal_pending(current)) {
1752                                 ret = -ERESTARTSYS;
1753                                 break;
1754                         }
1755                         cprev = cnow;
1756                 }
1757                 current->state = TASK_RUNNING;
1758                 remove_wait_queue(&info->delta_msr_wait, &wait);
1759                 break;
1760         }
1761         /* NOTREACHED */
1762         /*
1763          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1764          * Return: write counters to the user passed counter struct
1765          * NB: both 1->0 and 0->1 transitions are counted except for
1766          *     RI where only 0->1 is counted.
1767          */
1768         case TIOCGICOUNT:
1769                 spin_lock_irqsave(&info->slock, flags);
1770                 cnow = info->icount;
1771                 spin_unlock_irqrestore(&info->slock, flags);
1772                 p_cuser = argp;
1773                 if (put_user(cnow.frame, &p_cuser->frame))
1774                         return -EFAULT;
1775                 if (put_user(cnow.brk, &p_cuser->brk))
1776                         return -EFAULT;
1777                 if (put_user(cnow.overrun, &p_cuser->overrun))
1778                         return -EFAULT;
1779                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1780                         return -EFAULT;
1781                 if (put_user(cnow.parity, &p_cuser->parity))
1782                         return -EFAULT;
1783                 if (put_user(cnow.rx, &p_cuser->rx))
1784                         return -EFAULT;
1785                 if (put_user(cnow.tx, &p_cuser->tx))
1786                         return -EFAULT;
1787                 put_user(cnow.cts, &p_cuser->cts);
1788                 put_user(cnow.dsr, &p_cuser->dsr);
1789                 put_user(cnow.rng, &p_cuser->rng);
1790                 put_user(cnow.dcd, &p_cuser->dcd);
1791                 return 0;
1792         case MOXA_HighSpeedOn:
1793                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1794         case MOXA_SDS_RSTICOUNTER:
1795                 info->mon_data.rxcnt = 0;
1796                 info->mon_data.txcnt = 0;
1797                 return 0;
1798         case MOXA_ASPP_SETBAUD:{
1799                 long baud;
1800                 if (get_user(baud, (long __user *)argp))
1801                         return -EFAULT;
1802                 mxser_set_baud(info, baud);
1803                 return 0;
1804         }
1805         case MOXA_ASPP_GETBAUD:
1806                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1807                         return -EFAULT;
1808
1809                 return 0;
1810
1811         case MOXA_ASPP_OQUEUE:{
1812                 int len, lsr;
1813
1814                 len = mxser_chars_in_buffer(tty);
1815
1816                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1817
1818                 len += (lsr ? 0 : 1);
1819
1820                 if (copy_to_user(argp, &len, sizeof(int)))
1821                         return -EFAULT;
1822
1823                 return 0;
1824         }
1825         case MOXA_ASPP_MON: {
1826                 int mcr, status;
1827
1828                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1829                 mxser_check_modem_status(info, status);
1830
1831                 mcr = inb(info->ioaddr + UART_MCR);
1832                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1833                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1834                 else
1835                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1836
1837                 if (mcr & MOXA_MUST_MCR_TX_XON)
1838                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1839                 else
1840                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1841
1842                 if (info->tty->hw_stopped)
1843                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1844                 else
1845                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1846
1847                 if (copy_to_user(argp, &info->mon_data,
1848                                 sizeof(struct mxser_mon)))
1849                         return -EFAULT;
1850
1851                 return 0;
1852         }
1853         case MOXA_ASPP_LSTATUS: {
1854                 if (copy_to_user(argp, &info->err_shadow,
1855                                 sizeof(unsigned char)))
1856                         return -EFAULT;
1857
1858                 info->err_shadow = 0;
1859                 return 0;
1860         }
1861         case MOXA_SET_BAUD_METHOD: {
1862                 int method;
1863
1864                 if (get_user(method, (int __user *)argp))
1865                         return -EFAULT;
1866                 mxser_set_baud_method[tty->index] = method;
1867                 if (copy_to_user(argp, &method, sizeof(int)))
1868                         return -EFAULT;
1869
1870                 return 0;
1871         }
1872         default:
1873                 return -ENOIOCTLCMD;
1874         }
1875         return 0;
1876 }
1877
1878 static void mxser_stoprx(struct tty_struct *tty)
1879 {
1880         struct mxser_port *info = tty->driver_data;
1881
1882         info->ldisc_stop_rx = 1;
1883         if (I_IXOFF(tty)) {
1884                 if (info->board->chip_flag) {
1885                         info->IER &= ~MOXA_MUST_RECV_ISR;
1886                         outb(info->IER, info->ioaddr + UART_IER);
1887                 } else {
1888                         info->x_char = STOP_CHAR(tty);
1889                         outb(0, info->ioaddr + UART_IER);
1890                         info->IER |= UART_IER_THRI;
1891                         outb(info->IER, info->ioaddr + UART_IER);
1892                 }
1893         }
1894
1895         if (info->tty->termios->c_cflag & CRTSCTS) {
1896                 info->MCR &= ~UART_MCR_RTS;
1897                 outb(info->MCR, info->ioaddr + UART_MCR);
1898         }
1899 }
1900
1901 /*
1902  * This routine is called by the upper-layer tty layer to signal that
1903  * incoming characters should be throttled.
1904  */
1905 static void mxser_throttle(struct tty_struct *tty)
1906 {
1907         mxser_stoprx(tty);
1908 }
1909
1910 static void mxser_unthrottle(struct tty_struct *tty)
1911 {
1912         struct mxser_port *info = tty->driver_data;
1913
1914         /* startrx */
1915         info->ldisc_stop_rx = 0;
1916         if (I_IXOFF(tty)) {
1917                 if (info->x_char)
1918                         info->x_char = 0;
1919                 else {
1920                         if (info->board->chip_flag) {
1921                                 info->IER |= MOXA_MUST_RECV_ISR;
1922                                 outb(info->IER, info->ioaddr + UART_IER);
1923                         } else {
1924                                 info->x_char = START_CHAR(tty);
1925                                 outb(0, info->ioaddr + UART_IER);
1926                                 info->IER |= UART_IER_THRI;
1927                                 outb(info->IER, info->ioaddr + UART_IER);
1928                         }
1929                 }
1930         }
1931
1932         if (info->tty->termios->c_cflag & CRTSCTS) {
1933                 info->MCR |= UART_MCR_RTS;
1934                 outb(info->MCR, info->ioaddr + UART_MCR);
1935         }
1936 }
1937
1938 /*
1939  * mxser_stop() and mxser_start()
1940  *
1941  * This routines are called before setting or resetting tty->stopped.
1942  * They enable or disable transmitter interrupts, as necessary.
1943  */
1944 static void mxser_stop(struct tty_struct *tty)
1945 {
1946         struct mxser_port *info = tty->driver_data;
1947         unsigned long flags;
1948
1949         spin_lock_irqsave(&info->slock, flags);
1950         if (info->IER & UART_IER_THRI) {
1951                 info->IER &= ~UART_IER_THRI;
1952                 outb(info->IER, info->ioaddr + UART_IER);
1953         }
1954         spin_unlock_irqrestore(&info->slock, flags);
1955 }
1956
1957 static void mxser_start(struct tty_struct *tty)
1958 {
1959         struct mxser_port *info = tty->driver_data;
1960         unsigned long flags;
1961
1962         spin_lock_irqsave(&info->slock, flags);
1963         if (info->xmit_cnt && info->xmit_buf) {
1964                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1965                 info->IER |= UART_IER_THRI;
1966                 outb(info->IER, info->ioaddr + UART_IER);
1967         }
1968         spin_unlock_irqrestore(&info->slock, flags);
1969 }
1970
1971 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1972 {
1973         struct mxser_port *info = tty->driver_data;
1974         unsigned long flags;
1975
1976         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1977                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1978
1979                 mxser_change_speed(info, old_termios);
1980
1981                 if ((old_termios->c_cflag & CRTSCTS) &&
1982                                 !(tty->termios->c_cflag & CRTSCTS)) {
1983                         tty->hw_stopped = 0;
1984                         mxser_start(tty);
1985                 }
1986         }
1987
1988         /* Handle sw stopped */
1989         if ((old_termios->c_iflag & IXON) &&
1990                         !(tty->termios->c_iflag & IXON)) {
1991                 tty->stopped = 0;
1992
1993                 if (info->board->chip_flag) {
1994                         spin_lock_irqsave(&info->slock, flags);
1995                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1996                         spin_unlock_irqrestore(&info->slock, flags);
1997                 }
1998
1999                 mxser_start(tty);
2000         }
2001 }
2002
2003 /*
2004  * mxser_wait_until_sent() --- wait until the transmitter is empty
2005  */
2006 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2007 {
2008         struct mxser_port *info = tty->driver_data;
2009         unsigned long orig_jiffies, char_time;
2010         int lsr;
2011
2012         if (info->type == PORT_UNKNOWN)
2013                 return;
2014
2015         if (info->xmit_fifo_size == 0)
2016                 return;         /* Just in case.... */
2017
2018         orig_jiffies = jiffies;
2019         /*
2020          * Set the check interval to be 1/5 of the estimated time to
2021          * send a single character, and make it at least 1.  The check
2022          * interval should also be less than the timeout.
2023          *
2024          * Note: we have to use pretty tight timings here to satisfy
2025          * the NIST-PCTS.
2026          */
2027         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2028         char_time = char_time / 5;
2029         if (char_time == 0)
2030                 char_time = 1;
2031         if (timeout && timeout < char_time)
2032                 char_time = timeout;
2033         /*
2034          * If the transmitter hasn't cleared in twice the approximate
2035          * amount of time to send the entire FIFO, it probably won't
2036          * ever clear.  This assumes the UART isn't doing flow
2037          * control, which is currently the case.  Hence, if it ever
2038          * takes longer than info->timeout, this is probably due to a
2039          * UART bug of some kind.  So, we clamp the timeout parameter at
2040          * 2*info->timeout.
2041          */
2042         if (!timeout || timeout > 2 * info->timeout)
2043                 timeout = 2 * info->timeout;
2044 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2045         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2046                 timeout, char_time);
2047         printk("jiff=%lu...", jiffies);
2048 #endif
2049         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2050 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2051                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2052 #endif
2053                 schedule_timeout_interruptible(char_time);
2054                 if (signal_pending(current))
2055                         break;
2056                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2057                         break;
2058         }
2059         set_current_state(TASK_RUNNING);
2060
2061 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2062         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2063 #endif
2064 }
2065
2066 /*
2067  * This routine is called by tty_hangup() when a hangup is signaled.
2068  */
2069 void mxser_hangup(struct tty_struct *tty)
2070 {
2071         struct mxser_port *info = tty->driver_data;
2072
2073         mxser_flush_buffer(tty);
2074         mxser_shutdown(info);
2075         info->event = 0;
2076         info->count = 0;
2077         info->flags &= ~ASYNC_NORMAL_ACTIVE;
2078         info->tty = NULL;
2079         wake_up_interruptible(&info->open_wait);
2080 }
2081
2082 /*
2083  * mxser_rs_break() --- routine which turns the break handling on or off
2084  */
2085 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2086 {
2087         struct mxser_port *info = tty->driver_data;
2088         unsigned long flags;
2089
2090         spin_lock_irqsave(&info->slock, flags);
2091         if (break_state == -1)
2092                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2093                         info->ioaddr + UART_LCR);
2094         else
2095                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2096                         info->ioaddr + UART_LCR);
2097         spin_unlock_irqrestore(&info->slock, flags);
2098 }
2099
2100 static void mxser_receive_chars(struct mxser_port *port, int *status)
2101 {
2102         struct tty_struct *tty = port->tty;
2103         unsigned char ch, gdl;
2104         int ignored = 0;
2105         int cnt = 0;
2106         int recv_room;
2107         int max = 256;
2108         unsigned long flags;
2109
2110         spin_lock_irqsave(&port->slock, flags);
2111
2112         recv_room = tty->receive_room;
2113         if ((recv_room == 0) && (!port->ldisc_stop_rx))
2114                 mxser_stoprx(tty);
2115
2116         if (port->board->chip_flag != MOXA_OTHER_UART) {
2117
2118                 if (*status & UART_LSR_SPECIAL)
2119                         goto intr_old;
2120                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2121                                 (*status & MOXA_MUST_LSR_RERR))
2122                         goto intr_old;
2123                 if (*status & MOXA_MUST_LSR_RERR)
2124                         goto intr_old;
2125
2126                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2127
2128                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2129                         gdl &= MOXA_MUST_GDL_MASK;
2130                 if (gdl >= recv_room) {
2131                         if (!port->ldisc_stop_rx)
2132                                 mxser_stoprx(tty);
2133                 }
2134                 while (gdl--) {
2135                         ch = inb(port->ioaddr + UART_RX);
2136                         tty_insert_flip_char(tty, ch, 0);
2137                         cnt++;
2138                 }
2139                 goto end_intr;
2140         }
2141 intr_old:
2142
2143         do {
2144                 if (max-- < 0)
2145                         break;
2146
2147                 ch = inb(port->ioaddr + UART_RX);
2148                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2149                         outb(0x23, port->ioaddr + UART_FCR);
2150                 *status &= port->read_status_mask;
2151                 if (*status & port->ignore_status_mask) {
2152                         if (++ignored > 100)
2153                                 break;
2154                 } else {
2155                         char flag = 0;
2156                         if (*status & UART_LSR_SPECIAL) {
2157                                 if (*status & UART_LSR_BI) {
2158                                         flag = TTY_BREAK;
2159                                         port->icount.brk++;
2160
2161                                         if (port->flags & ASYNC_SAK)
2162                                                 do_SAK(tty);
2163                                 } else if (*status & UART_LSR_PE) {
2164                                         flag = TTY_PARITY;
2165                                         port->icount.parity++;
2166                                 } else if (*status & UART_LSR_FE) {
2167                                         flag = TTY_FRAME;
2168                                         port->icount.frame++;
2169                                 } else if (*status & UART_LSR_OE) {
2170                                         flag = TTY_OVERRUN;
2171                                         port->icount.overrun++;
2172                                 }
2173                         }
2174                         tty_insert_flip_char(tty, ch, flag);
2175                         cnt++;
2176                         if (cnt >= recv_room) {
2177                                 if (!port->ldisc_stop_rx)
2178                                         mxser_stoprx(tty);
2179                                 break;
2180                         }
2181
2182                 }
2183
2184                 if (port->board->chip_flag)
2185                         break;
2186
2187                 *status = inb(port->ioaddr + UART_LSR);
2188         } while (*status & UART_LSR_DR);
2189
2190 end_intr:
2191         mxvar_log.rxcnt[port->tty->index] += cnt;
2192         port->mon_data.rxcnt += cnt;
2193         port->mon_data.up_rxcnt += cnt;
2194         spin_unlock_irqrestore(&port->slock, flags);
2195
2196         tty_flip_buffer_push(tty);
2197 }
2198
2199 static void mxser_transmit_chars(struct mxser_port *port)
2200 {
2201         int count, cnt;
2202         unsigned long flags;
2203
2204         spin_lock_irqsave(&port->slock, flags);
2205
2206         if (port->x_char) {
2207                 outb(port->x_char, port->ioaddr + UART_TX);
2208                 port->x_char = 0;
2209                 mxvar_log.txcnt[port->tty->index]++;
2210                 port->mon_data.txcnt++;
2211                 port->mon_data.up_txcnt++;
2212                 port->icount.tx++;
2213                 goto unlock;
2214         }
2215
2216         if (port->xmit_buf == 0)
2217                 goto unlock;
2218
2219         if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2220                         (port->tty->hw_stopped &&
2221                         (port->type != PORT_16550A) &&
2222                         (!port->board->chip_flag))) {
2223                 port->IER &= ~UART_IER_THRI;
2224                 outb(port->IER, port->ioaddr + UART_IER);
2225                 goto unlock;
2226         }
2227
2228         cnt = port->xmit_cnt;
2229         count = port->xmit_fifo_size;
2230         do {
2231                 outb(port->xmit_buf[port->xmit_tail++],
2232                         port->ioaddr + UART_TX);
2233                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2234                 if (--port->xmit_cnt <= 0)
2235                         break;
2236         } while (--count > 0);
2237         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2238
2239         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2240         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2241         port->icount.tx += (cnt - port->xmit_cnt);
2242
2243         if (port->xmit_cnt < WAKEUP_CHARS) {
2244                 set_bit(MXSER_EVENT_TXLOW, &port->event);
2245                 schedule_work(&port->tqueue);
2246         }
2247         if (port->xmit_cnt <= 0) {
2248                 port->IER &= ~UART_IER_THRI;
2249                 outb(port->IER, port->ioaddr + UART_IER);
2250         }
2251 unlock:
2252         spin_unlock_irqrestore(&port->slock, flags);
2253 }
2254
2255 /*
2256  * This is the serial driver's generic interrupt routine
2257  */
2258 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2259 {
2260         int status, iir, i;
2261         struct mxser_board *brd = NULL;
2262         struct mxser_port *port;
2263         int max, irqbits, bits, msr;
2264         int pass_counter = 0;
2265         unsigned int int_cnt;
2266         int handled = IRQ_NONE;
2267
2268         for (i = 0; i < MXSER_BOARDS; i++)
2269                 if (dev_id == &mxser_boards[i]) {
2270                         brd = dev_id;
2271                         break;
2272                 }
2273
2274         if (i == MXSER_BOARDS)
2275                 goto irq_stop;
2276         if (brd == NULL)
2277                 goto irq_stop;
2278         max = brd->info->nports;
2279         while (1) {
2280                 irqbits = inb(brd->vector) & brd->vector_mask;
2281                 if (irqbits == brd->vector_mask)
2282                         break;
2283
2284                 handled = IRQ_HANDLED;
2285                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2286                         if (irqbits == brd->vector_mask)
2287                                 break;
2288                         if (bits & irqbits)
2289                                 continue;
2290                         port = &brd->ports[i];
2291
2292                         int_cnt = 0;
2293                         do {
2294                                 iir = inb(port->ioaddr + UART_IIR);
2295                                 if (iir & UART_IIR_NO_INT)
2296                                         break;
2297                                 iir &= MOXA_MUST_IIR_MASK;
2298                                 if (!port->tty) {
2299                                         status = inb(port->ioaddr + UART_LSR);
2300                                         outb(0x27, port->ioaddr + UART_FCR);
2301                                         inb(port->ioaddr + UART_MSR);
2302                                         break;
2303                                 }
2304
2305                                 status = inb(port->ioaddr + UART_LSR);
2306
2307                                 if (status & UART_LSR_PE)
2308                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2309                                 if (status & UART_LSR_FE)
2310                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2311                                 if (status & UART_LSR_OE)
2312                                         port->err_shadow |=
2313                                                 NPPI_NOTIFY_HW_OVERRUN;
2314                                 if (status & UART_LSR_BI)
2315                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2316
2317                                 if (port->board->chip_flag) {
2318                                         if (iir == MOXA_MUST_IIR_GDA ||
2319                                             iir == MOXA_MUST_IIR_RDA ||
2320                                             iir == MOXA_MUST_IIR_RTO ||
2321                                             iir == MOXA_MUST_IIR_LSR)
2322                                                 mxser_receive_chars(port,
2323                                                                 &status);
2324
2325                                 } else {
2326                                         status &= port->read_status_mask;
2327                                         if (status & UART_LSR_DR)
2328                                                 mxser_receive_chars(port,
2329                                                                 &status);
2330                                 }
2331                                 msr = inb(port->ioaddr + UART_MSR);
2332                                 if (msr & UART_MSR_ANY_DELTA)
2333                                         mxser_check_modem_status(port, msr);
2334
2335                                 if (port->board->chip_flag) {
2336                                         if (iir == 0x02 && (status &
2337                                                                 UART_LSR_THRE))
2338                                                 mxser_transmit_chars(port);
2339                                 } else {
2340                                         if (status & UART_LSR_THRE)
2341                                                 mxser_transmit_chars(port);
2342                                 }
2343                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2344                 }
2345                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
2346                         break;  /* Prevent infinite loops */
2347         }
2348
2349 irq_stop:
2350         return handled;
2351 }
2352
2353 static const struct tty_operations mxser_ops = {
2354         .open = mxser_open,
2355         .close = mxser_close,
2356         .write = mxser_write,
2357         .put_char = mxser_put_char,
2358         .flush_chars = mxser_flush_chars,
2359         .write_room = mxser_write_room,
2360         .chars_in_buffer = mxser_chars_in_buffer,
2361         .flush_buffer = mxser_flush_buffer,
2362         .ioctl = mxser_ioctl,
2363         .throttle = mxser_throttle,
2364         .unthrottle = mxser_unthrottle,
2365         .set_termios = mxser_set_termios,
2366         .stop = mxser_stop,
2367         .start = mxser_start,
2368         .hangup = mxser_hangup,
2369         .break_ctl = mxser_rs_break,
2370         .wait_until_sent = mxser_wait_until_sent,
2371         .tiocmget = mxser_tiocmget,
2372         .tiocmset = mxser_tiocmset,
2373 };
2374
2375 /*
2376  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2377  */
2378
2379 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2380                 unsigned int irq)
2381 {
2382         if (irq)
2383                 free_irq(brd->irq, brd);
2384         if (pdev != NULL) {     /* PCI */
2385 #ifdef CONFIG_PCI
2386                 pci_release_region(pdev, 2);
2387                 pci_release_region(pdev, 3);
2388                 pci_dev_put(pdev);
2389 #endif
2390         } else {
2391                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2392                 release_region(brd->vector, 1);
2393         }
2394 }
2395
2396 static int __devinit mxser_initbrd(struct mxser_board *brd,
2397                 struct pci_dev *pdev)
2398 {
2399         struct mxser_port *info;
2400         unsigned int i;
2401         int retval;
2402
2403         printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2404
2405         for (i = 0; i < brd->info->nports; i++) {
2406                 info = &brd->ports[i];
2407                 info->board = brd;
2408                 info->stop_rx = 0;
2409                 info->ldisc_stop_rx = 0;
2410
2411                 /* Enhance mode enabled here */
2412                 if (brd->chip_flag != MOXA_OTHER_UART)
2413                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2414
2415                 info->flags = ASYNC_SHARE_IRQ;
2416                 info->type = brd->uart_type;
2417
2418                 process_txrx_fifo(info);
2419
2420                 info->custom_divisor = info->baud_base * 16;
2421                 info->close_delay = 5 * HZ / 10;
2422                 info->closing_wait = 30 * HZ;
2423                 INIT_WORK(&info->tqueue, mxser_do_softint);
2424                 info->normal_termios = mxvar_sdriver->init_termios;
2425                 init_waitqueue_head(&info->open_wait);
2426                 init_waitqueue_head(&info->close_wait);
2427                 init_waitqueue_head(&info->delta_msr_wait);
2428                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2429                 info->err_shadow = 0;
2430                 spin_lock_init(&info->slock);
2431
2432                 /* before set INT ISR, disable all int */
2433                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2434                         info->ioaddr + UART_IER);
2435         }
2436         /*
2437          * Allocate the IRQ if necessary
2438          */
2439
2440         retval = request_irq(brd->irq, mxser_interrupt,
2441                         (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
2442                         IRQF_DISABLED, "mxser", brd);
2443         if (retval) {
2444                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2445                         "conflict with another device.\n",
2446                         brd->info->name, brd->irq);
2447                 /* We hold resources, we need to release them. */
2448                 mxser_release_res(brd, pdev, 0);
2449                 return retval;
2450         }
2451         return 0;
2452 }
2453
2454 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2455 {
2456         int id, i, bits;
2457         unsigned short regs[16], irq;
2458         unsigned char scratch, scratch2;
2459
2460         brd->chip_flag = MOXA_OTHER_UART;
2461
2462         id = mxser_read_register(cap, regs);
2463         switch (id) {
2464         case C168_ASIC_ID:
2465                 brd->info = &mxser_cards[0];
2466                 break;
2467         case C104_ASIC_ID:
2468                 brd->info = &mxser_cards[1];
2469                 break;
2470         case CI104J_ASIC_ID:
2471                 brd->info = &mxser_cards[2];
2472                 break;
2473         case C102_ASIC_ID:
2474                 brd->info = &mxser_cards[5];
2475                 break;
2476         case CI132_ASIC_ID:
2477                 brd->info = &mxser_cards[6];
2478                 break;
2479         case CI134_ASIC_ID:
2480                 brd->info = &mxser_cards[7];
2481                 break;
2482         default:
2483                 return 0;
2484         }
2485
2486         irq = 0;
2487         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2488            Flag-hack checks if configuration should be read as 2-port here. */
2489         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2490                 irq = regs[9] & 0xF000;
2491                 irq = irq | (irq >> 4);
2492                 if (irq != (regs[9] & 0xFF00))
2493                         return MXSER_ERR_IRQ_CONFLIT;
2494         } else if (brd->info->nports == 4) {
2495                 irq = regs[9] & 0xF000;
2496                 irq = irq | (irq >> 4);
2497                 irq = irq | (irq >> 8);
2498                 if (irq != regs[9])
2499                         return MXSER_ERR_IRQ_CONFLIT;
2500         } else if (brd->info->nports == 8) {
2501                 irq = regs[9] & 0xF000;
2502                 irq = irq | (irq >> 4);
2503                 irq = irq | (irq >> 8);
2504                 if ((irq != regs[9]) || (irq != regs[10]))
2505                         return MXSER_ERR_IRQ_CONFLIT;
2506         }
2507
2508         if (!irq)
2509                 return MXSER_ERR_IRQ;
2510         brd->irq = ((int)(irq & 0xF000) >> 12);
2511         for (i = 0; i < 8; i++)
2512                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2513         if ((regs[12] & 0x80) == 0)
2514                 return MXSER_ERR_VECTOR;
2515         brd->vector = (int)regs[11];    /* interrupt vector */
2516         if (id == 1)
2517                 brd->vector_mask = 0x00FF;
2518         else
2519                 brd->vector_mask = 0x000F;
2520         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2521                 if (regs[12] & bits) {
2522                         brd->ports[i].baud_base = 921600;
2523                         brd->ports[i].max_baud = 921600;
2524                 } else {
2525                         brd->ports[i].baud_base = 115200;
2526                         brd->ports[i].max_baud = 115200;
2527                 }
2528         }
2529         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2530         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2531         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2532         outb(scratch2, cap + UART_LCR);
2533         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2534         scratch = inb(cap + UART_IIR);
2535
2536         if (scratch & 0xC0)
2537                 brd->uart_type = PORT_16550A;
2538         else
2539                 brd->uart_type = PORT_16450;
2540         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2541                         "mxser(IO)"))
2542                 return MXSER_ERR_IOADDR;
2543         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2544                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2545                 return MXSER_ERR_VECTOR;
2546         }
2547         return brd->info->nports;
2548 }
2549
2550 static int __devinit mxser_probe(struct pci_dev *pdev,
2551                 const struct pci_device_id *ent)
2552 {
2553 #ifdef CONFIG_PCI
2554         struct mxser_board *brd;
2555         unsigned int i, j;
2556         unsigned long ioaddress;
2557         int retval = -EINVAL;
2558
2559         for (i = 0; i < MXSER_BOARDS; i++)
2560                 if (mxser_boards[i].info == NULL)
2561                         break;
2562
2563         if (i >= MXSER_BOARDS) {
2564                 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2565                         "(maximum %d), board not configured\n", MXSER_BOARDS);
2566                 goto err;
2567         }
2568
2569         brd = &mxser_boards[i];
2570         brd->idx = i * MXSER_PORTS_PER_BOARD;
2571         printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2572                 mxser_cards[ent->driver_data].name,
2573                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2574
2575         retval = pci_enable_device(pdev);
2576         if (retval) {
2577                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2578                 goto err;
2579         }
2580
2581         /* io address */
2582         ioaddress = pci_resource_start(pdev, 2);
2583         retval = pci_request_region(pdev, 2, "mxser(IO)");
2584         if (retval)
2585                 goto err;
2586
2587         brd->info = &mxser_cards[ent->driver_data];
2588         for (i = 0; i < brd->info->nports; i++)
2589                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2590
2591         /* vector */
2592         ioaddress = pci_resource_start(pdev, 3);
2593         retval = pci_request_region(pdev, 3, "mxser(vector)");
2594         if (retval)
2595                 goto err_relio;
2596         brd->vector = ioaddress;
2597
2598         /* irq */
2599         brd->irq = pdev->irq;
2600
2601         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2602         brd->uart_type = PORT_16550A;
2603         brd->vector_mask = 0;
2604
2605         for (i = 0; i < brd->info->nports; i++) {
2606                 for (j = 0; j < UART_INFO_NUM; j++) {
2607                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2608                                 brd->ports[i].max_baud =
2609                                         Gpci_uart_info[j].max_baud;
2610
2611                                 /* exception....CP-102 */
2612                                 if (brd->info->flags & MXSER_HIGHBAUD)
2613                                         brd->ports[i].max_baud = 921600;
2614                                 break;
2615                         }
2616                 }
2617         }
2618
2619         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2620                 for (i = 0; i < brd->info->nports; i++) {
2621                         if (i < 4)
2622                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2623                         else
2624                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2625                 }
2626                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2627                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2628         }
2629
2630         for (i = 0; i < brd->info->nports; i++) {
2631                 brd->vector_mask |= (1 << i);
2632                 brd->ports[i].baud_base = 921600;
2633         }
2634
2635         /* mxser_initbrd will hook ISR. */
2636         if (mxser_initbrd(brd, pdev) < 0)
2637                 goto err_relvec;
2638
2639         for (i = 0; i < brd->info->nports; i++)
2640                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2641
2642         pci_set_drvdata(pdev, brd);
2643
2644         return 0;
2645 err_relvec:
2646         pci_release_region(pdev, 3);
2647 err_relio:
2648         pci_release_region(pdev, 2);
2649         brd->info = NULL;
2650 err:
2651         return retval;
2652 #else
2653         return -ENODEV;
2654 #endif
2655 }
2656
2657 static void __devexit mxser_remove(struct pci_dev *pdev)
2658 {
2659         struct mxser_board *brd = pci_get_drvdata(pdev);
2660         unsigned int i;
2661
2662         for (i = 0; i < brd->info->nports; i++)
2663                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2664
2665         mxser_release_res(brd, pdev, 1);
2666 }
2667
2668 static struct pci_driver mxser_driver = {
2669         .name = "mxser",
2670         .id_table = mxser_pcibrds,
2671         .probe = mxser_probe,
2672         .remove = __devexit_p(mxser_remove)
2673 };
2674
2675 static int __init mxser_module_init(void)
2676 {
2677         struct mxser_board *brd;
2678         unsigned long cap;
2679         unsigned int i, m, isaloop;
2680         int retval, b;
2681
2682         pr_debug("Loading module mxser ...\n");
2683
2684         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2685         if (!mxvar_sdriver)
2686                 return -ENOMEM;
2687         spin_lock_init(&gm_lock);
2688
2689         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2690                 MXSER_VERSION);
2691
2692         /* Initialize the tty_driver structure */
2693         mxvar_sdriver->owner = THIS_MODULE;
2694         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2695         mxvar_sdriver->name = "ttyMI";
2696         mxvar_sdriver->major = ttymajor;
2697         mxvar_sdriver->minor_start = 0;
2698         mxvar_sdriver->num = MXSER_PORTS + 1;
2699         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2700         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2701         mxvar_sdriver->init_termios = tty_std_termios;
2702         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2703         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2704         tty_set_operations(mxvar_sdriver, &mxser_ops);
2705
2706         retval = tty_register_driver(mxvar_sdriver);
2707         if (retval) {
2708                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2709                                 "tty driver !\n");
2710                 goto err_put;
2711         }
2712
2713         mxvar_diagflag = 0;
2714
2715         m = 0;
2716         /* Start finding ISA boards here */
2717         for (isaloop = 0; isaloop < 2; isaloop++)
2718                 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2719                         if (!isaloop)
2720                                 cap = mxserBoardCAP[b]; /* predefined */
2721                         else
2722                                 cap = ioaddr[b]; /* module param */
2723
2724                         if (!cap)
2725                                 continue;
2726
2727                         brd = &mxser_boards[m];
2728                         retval = mxser_get_ISA_conf(cap, brd);
2729
2730                         if (retval != 0)
2731                                 printk(KERN_INFO "Found MOXA %s board "
2732                                         "(CAP=0x%x)\n",
2733                                         brd->info->name, ioaddr[b]);
2734
2735                         if (retval <= 0) {
2736                                 if (retval == MXSER_ERR_IRQ)
2737                                         printk(KERN_ERR "Invalid interrupt "
2738                                                 "number, board not "
2739                                                 "configured\n");
2740                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2741                                         printk(KERN_ERR "Invalid interrupt "
2742                                                 "number, board not "
2743                                                 "configured\n");
2744                                 else if (retval == MXSER_ERR_VECTOR)
2745                                         printk(KERN_ERR "Invalid interrupt "
2746                                                 "vector, board not "
2747                                                 "configured\n");
2748                                 else if (retval == MXSER_ERR_IOADDR)
2749                                         printk(KERN_ERR "Invalid I/O address, "
2750                                                 "board not configured\n");
2751
2752                                 brd->info = NULL;
2753                                 continue;
2754                         }
2755
2756                         /* mxser_initbrd will hook ISR. */
2757                         if (mxser_initbrd(brd, NULL) < 0) {
2758                                 brd->info = NULL;
2759                                 continue;
2760                         }
2761
2762                         brd->idx = m * MXSER_PORTS_PER_BOARD;
2763                         for (i = 0; i < brd->info->nports; i++)
2764                                 tty_register_device(mxvar_sdriver, brd->idx + i,
2765                                                 NULL);
2766
2767                         m++;
2768                 }
2769
2770         retval = pci_register_driver(&mxser_driver);
2771         if (retval) {
2772                 printk(KERN_ERR "Can't register pci driver\n");
2773                 if (!m) {
2774                         retval = -ENODEV;
2775                         goto err_unr;
2776                 } /* else: we have some ISA cards under control */
2777         }
2778
2779         pr_debug("Done.\n");
2780
2781         return 0;
2782 err_unr:
2783         tty_unregister_driver(mxvar_sdriver);
2784 err_put:
2785         put_tty_driver(mxvar_sdriver);
2786         return retval;
2787 }
2788
2789 static void __exit mxser_module_exit(void)
2790 {
2791         unsigned int i, j;
2792
2793         pr_debug("Unloading module mxser ...\n");
2794
2795         pci_unregister_driver(&mxser_driver);
2796
2797         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2798                 if (mxser_boards[i].info != NULL)
2799                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2800                                 tty_unregister_device(mxvar_sdriver,
2801                                                 mxser_boards[i].idx + j);
2802         tty_unregister_driver(mxvar_sdriver);
2803         put_tty_driver(mxvar_sdriver);
2804
2805         for (i = 0; i < MXSER_BOARDS; i++)
2806                 if (mxser_boards[i].info != NULL)
2807                         mxser_release_res(&mxser_boards[i], NULL, 1);
2808
2809         pr_debug("Done.\n");
2810 }
2811
2812 module_init(mxser_module_init);
2813 module_exit(mxser_module_exit);