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  *
   6  *      This code is loosely based on the Linux serial driver, written by
   7  *      Linus Torvalds, Theodore T'so and others.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  24  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  25  *      - Fixed x86_64 cleanness
  26  *      - Fixed sleep with spinlock held in mxser_send_break
  27  */
  28
  29
  30 #include <linux/module.h>
  31 #include <linux/autoconf.h>
  32 #include <linux/errno.h>
  33 #include <linux/signal.h>
  34 #include <linux/sched.h>
  35 #include <linux/timer.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_flip.h>
  39 #include <linux/serial.h>
  40 #include <linux/serial_reg.h>
  41 #include <linux/major.h>
  42 #include <linux/string.h>
  43 #include <linux/fcntl.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/gfp.h>
  46 #include <linux/ioport.h>
  47 #include <linux/mm.h>
  48 #include <linux/smp_lock.h>
  49 #include <linux/delay.h>
  50 #include <linux/pci.h>
  51
  52 #include <asm/system.h>
  53 #include <asm/io.h>
  54 #include <asm/irq.h>
  55 #include <asm/bitops.h>
  56 #include <asm/uaccess.h>
  57
  58 #include "mxser_new.h"
  59
  60 #define MXSER_VERSION   "2.0"
  61 #define MXSERMAJOR       174
  62 #define MXSERCUMAJOR     175
  63
  64 #define MXSER_EVENT_TXLOW       1
  65 #define MXSER_EVENT_HANGUP      2
  66
  67 #define MXSER_BOARDS            4       /* Max. boards */
  68 #define MXSER_PORTS             32      /* Max. ports */
  69 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  70 #define MXSER_ISR_PASS_LIMIT    99999L
  71
  72 #define MXSER_ERR_IOADDR        -1
  73 #define MXSER_ERR_IRQ           -2
  74 #define MXSER_ERR_IRQ_CONFLIT   -3
  75 #define MXSER_ERR_VECTOR        -4
  76
  77 #define SERIAL_TYPE_NORMAL      1
  78 #define SERIAL_TYPE_CALLOUT     2
  79
  80 #define WAKEUP_CHARS            256
  81
  82 #define UART_MCR_AFE            0x20
  83 #define UART_LSR_SPECIAL        0x1E
  84
  85 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  86                                           IXON|IXOFF))
  87
  88 #define C168_ASIC_ID    1
  89 #define C104_ASIC_ID    2
  90 #define C102_ASIC_ID    0xB
  91 #define CI132_ASIC_ID   4
  92 #define CI134_ASIC_ID   3
  93 #define CI104J_ASIC_ID  5
  94
  95 enum {
  96         MXSER_BOARD_C168_ISA = 1,
  97         MXSER_BOARD_C104_ISA,
  98         MXSER_BOARD_CI104J,
  99         MXSER_BOARD_C168_PCI,
 100         MXSER_BOARD_C104_PCI,
 101         MXSER_BOARD_C102_ISA,
 102         MXSER_BOARD_CI132,
 103         MXSER_BOARD_CI134,
 104         MXSER_BOARD_CP132,
 105         MXSER_BOARD_CP114,
 106         MXSER_BOARD_CT114,
 107         MXSER_BOARD_CP102,
 108         MXSER_BOARD_CP104U,
 109         MXSER_BOARD_CP168U,
 110         MXSER_BOARD_CP132U,
 111         MXSER_BOARD_CP134U,
 112         MXSER_BOARD_CP104JU,
 113         MXSER_BOARD_RC7000,
 114         MXSER_BOARD_CP118U,
 115         MXSER_BOARD_CP102UL,
 116         MXSER_BOARD_CP102U,
 117         MXSER_BOARD_CP118EL,
 118         MXSER_BOARD_CP168EL,
 119         MXSER_BOARD_CP104EL
 120 };
 121
 122 static char *mxser_brdname[] = {
 123         "C168 series",
 124         "C104 series",
 125         "CI-104J series",
 126         "C168H/PCI series",
 127         "C104H/PCI series",
 128         "C102 series",
 129         "CI-132 series",
 130         "CI-134 series",
 131         "CP-132 series",
 132         "CP-114 series",
 133         "CT-114 series",
 134         "CP-102 series",
 135         "CP-104U series",
 136         "CP-168U series",
 137         "CP-132U series",
 138         "CP-134U series",
 139         "CP-104JU series",
 140         "Moxa UC7000 Serial",
 141         "CP-118U series",
 142         "CP-102UL series",
 143         "CP-102U series",
 144         "CP-118EL series",
 145         "CP-168EL series",
 146         "CP-104EL series"
 147 };
 148
 149 static int mxser_numports[] = {
 150         8,                      /* C168-ISA */
 151         4,                      /* C104-ISA */
 152         4,                      /* CI104J */
 153         8,                      /* C168-PCI */
 154         4,                      /* C104-PCI */
 155         2,                      /* C102-ISA */
 156         2,                      /* CI132 */
 157         4,                      /* CI134 */
 158         2,                      /* CP132 */
 159         4,                      /* CP114 */
 160         4,                      /* CT114 */
 161         2,                      /* CP102 */
 162         4,                      /* CP104U */
 163         8,                      /* CP168U */
 164         2,                      /* CP132U */
 165         4,                      /* CP134U */
 166         4,                      /* CP104JU */
 167         8,                      /* RC7000 */
 168         8,                      /* CP118U */
 169         2,                      /* CP102UL */
 170         2,                      /* CP102U */
 171         8,                      /* CP118EL */
 172         8,                      /* CP168EL */
 173         4                       /* CP104EL */
 174 };
 175
 176 #define UART_TYPE_NUM   2
 177
 178 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 179         MOXA_MUST_MU150_HWID,
 180         MOXA_MUST_MU860_HWID
 181 };
 182
 183 /* This is only for PCI */
 184 #define UART_INFO_NUM   3
 185 struct mxpciuart_info {
 186         int type;
 187         int tx_fifo;
 188         int rx_fifo;
 189         int xmit_fifo_size;
 190         int rx_high_water;
 191         int rx_trigger;
 192         int rx_low_water;
 193         long max_baud;
 194 };
 195
 196 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 197         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 198         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 199         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 200 };
 201
 202
 203 static struct pci_device_id mxser_pcibrds[] = {
 204         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
 205                 .driver_data = MXSER_BOARD_C168_PCI },
 206         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
 207                 .driver_data = MXSER_BOARD_C104_PCI },
 208         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
 209                 .driver_data = MXSER_BOARD_CP132 },
 210         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
 211                 .driver_data = MXSER_BOARD_CP114 },
 212         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
 213                 .driver_data = MXSER_BOARD_CT114 },
 214         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
 215                 .driver_data = MXSER_BOARD_CP102 },
 216         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
 217                 .driver_data = MXSER_BOARD_CP104U },
 218         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
 219                 .driver_data = MXSER_BOARD_CP168U },
 220         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
 221                 .driver_data = MXSER_BOARD_CP132U },
 222         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
 223                 .driver_data = MXSER_BOARD_CP134U },
 224         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
 225                 .driver_data = MXSER_BOARD_CP104JU },
 226         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
 227                 .driver_data = MXSER_BOARD_RC7000 },
 228         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
 229                 .driver_data = MXSER_BOARD_CP118U },
 230         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
 231                 .driver_data = MXSER_BOARD_CP102UL },
 232         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
 233                 .driver_data = MXSER_BOARD_CP102U },
 234         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
 235                 .driver_data = MXSER_BOARD_CP118EL },
 236         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
 237                 .driver_data = MXSER_BOARD_CP168EL },
 238         { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
 239                 .driver_data = MXSER_BOARD_CP104EL },
 240         { }
 241 };
 242 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 243
 244 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 245 static int ttymajor = MXSERMAJOR;
 246 static int calloutmajor = MXSERCUMAJOR;
 247 static int verbose = 0;
 248
 249 /* Variables for insmod */
 250
 251 MODULE_AUTHOR("Casper Yang");
 252 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 253 module_param_array(ioaddr, int, NULL, 0);
 254 module_param(ttymajor, int, 0);
 255 module_param(verbose, bool, 0);
 256 MODULE_LICENSE("GPL");
 257
 258 struct mxser_log {
 259         int tick;
 260         unsigned long rxcnt[MXSER_PORTS];
 261         unsigned long txcnt[MXSER_PORTS];
 262 };
 263
 264
 265 struct mxser_mon {
 266         unsigned long rxcnt;
 267         unsigned long txcnt;
 268         unsigned long up_rxcnt;
 269         unsigned long up_txcnt;
 270         int modem_status;
 271         unsigned char hold_reason;
 272 };
 273
 274 struct mxser_mon_ext {
 275         unsigned long rx_cnt[32];
 276         unsigned long tx_cnt[32];
 277         unsigned long up_rxcnt[32];
 278         unsigned long up_txcnt[32];
 279         int modem_status[32];
 280
 281         long baudrate[32];
 282         int databits[32];
 283         int stopbits[32];
 284         int parity[32];
 285         int flowctrl[32];
 286         int fifo[32];
 287         int iftype[32];
 288 };
 289
 290 struct mxser_board;
 291
 292 struct mxser_port {
 293         struct mxser_board *board;
 294         struct tty_struct *tty;
 295
 296         unsigned long ioaddr;
 297         unsigned long opmode_ioaddr;
 298         int max_baud;
 299
 300         int rx_high_water;
 301         int rx_trigger;         /* Rx fifo trigger level */
 302         int rx_low_water;
 303         int baud_base;          /* max. speed */
 304         long realbaud;
 305         int type;               /* UART type */
 306         int flags;              /* defined in tty.h */
 307         long session;           /* Session of opening process */
 308         long pgrp;              /* pgrp of opening process */
 309
 310         int x_char;             /* xon/xoff character */
 311         int IER;                /* Interrupt Enable Register */
 312         int MCR;                /* Modem control register */
 313
 314         unsigned char stop_rx;
 315         unsigned char ldisc_stop_rx;
 316
 317         int custom_divisor;
 318         int close_delay;
 319         unsigned short closing_wait;
 320         unsigned char err_shadow;
 321         unsigned long event;
 322
 323         int count;              /* # of fd on device */
 324         int blocked_open;       /* # of blocked opens */
 325         struct async_icount icount; /* kernel counters for 4 input interrupts */
 326         int timeout;
 327
 328         int read_status_mask;
 329         int ignore_status_mask;
 330         int xmit_fifo_size;
 331         unsigned char *xmit_buf;
 332         int xmit_head;
 333         int xmit_tail;
 334         int xmit_cnt;
 335
 336         struct termios normal_termios;
 337         struct termios callout_termios;
 338
 339         struct mxser_mon mon_data;
 340
 341         spinlock_t slock;
 342         struct work_struct tqueue;
 343         wait_queue_head_t open_wait;
 344         wait_queue_head_t close_wait;
 345         wait_queue_head_t delta_msr_wait;
 346 };
 347
 348 struct mxser_board {
 349         struct pci_dev *pdev; /* temporary (until pci probing) */
 350
 351         int irq;
 352         int board_type;
 353         unsigned int nports;
 354         unsigned long vector;
 355         unsigned long vector_mask;
 356
 357         int chip_flag;
 358         int uart_type;
 359
 360         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 361 };
 362
 363 struct mxser_mstatus {
 364         tcflag_t cflag;
 365         int cts;
 366         int dsr;
 367         int ri;
 368         int dcd;
 369 };
 370
 371 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 372
 373 static int mxserBoardCAP[MXSER_BOARDS] = {
 374         0, 0, 0, 0
 375         /*  0x180, 0x280, 0x200, 0x320 */
 376 };
 377
 378 static struct mxser_board mxser_boards[MXSER_BOARDS];
 379 static struct tty_driver *mxvar_sdriver;
 380 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 381 static struct termios *mxvar_termios[MXSER_PORTS + 1];
 382 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
 383 static struct mxser_log mxvar_log;
 384 static int mxvar_diagflag;
 385 static unsigned char mxser_msr[MXSER_PORTS + 1];
 386 static struct mxser_mon_ext mon_data_ext;
 387 static int mxser_set_baud_method[MXSER_PORTS + 1];
 388 static spinlock_t gm_lock;
 389
 390 /*
 391  * static functions:
 392  */
 393
 394 static int mxser_init(void);
 395
 396 /* static void   mxser_poll(unsigned long); */
 397 static int mxser_get_ISA_conf(int, struct mxser_board *);
 398 static void mxser_do_softint(void *);
 399 static int mxser_open(struct tty_struct *, struct file *);
 400 static void mxser_close(struct tty_struct *, struct file *);
 401 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 402 static int mxser_write_room(struct tty_struct *);
 403 static void mxser_flush_buffer(struct tty_struct *);
 404 static int mxser_chars_in_buffer(struct tty_struct *);
 405 static void mxser_flush_chars(struct tty_struct *);
 406 static void mxser_put_char(struct tty_struct *, unsigned char);
 407 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 408 static int mxser_ioctl_special(unsigned int, void __user *);
 409 static void mxser_throttle(struct tty_struct *);
 410 static void mxser_unthrottle(struct tty_struct *);
 411 static void mxser_set_termios(struct tty_struct *, struct termios *);
 412 static void mxser_stop(struct tty_struct *);
 413 static void mxser_start(struct tty_struct *);
 414 static void mxser_hangup(struct tty_struct *);
 415 static void mxser_rs_break(struct tty_struct *, int);
 416 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
 417 static void mxser_receive_chars(struct mxser_port *, int *);
 418 static void mxser_transmit_chars(struct mxser_port *);
 419 static void mxser_check_modem_status(struct mxser_port *, int);
 420 static int mxser_block_til_ready(struct tty_struct *, struct file *,
 421                 struct mxser_port *);
 422 static int mxser_startup(struct mxser_port *);
 423 static void mxser_shutdown(struct mxser_port *);
 424 static int mxser_change_speed(struct mxser_port *, struct termios *);
 425 static int mxser_get_serial_info(struct mxser_port *,
 426                 struct serial_struct __user *);
 427 static int mxser_set_serial_info(struct mxser_port *,
 428                 struct serial_struct __user *);
 429 static int mxser_get_lsr_info(struct mxser_port *, unsigned int __user *);
 430 static void mxser_send_break(struct mxser_port *, int);
 431 static int mxser_tiocmget(struct tty_struct *, struct file *);
 432 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int,
 433                 unsigned int);
 434 static int mxser_set_baud(struct mxser_port *, long);
 435 static void mxser_wait_until_sent(struct tty_struct *, int);
 436
 437 static void mxser_startrx(struct tty_struct *);
 438 static void mxser_stoprx(struct tty_struct *);
 439
 440
 441 static int CheckIsMoxaMust(int io)
 442 {
 443         u8 oldmcr, hwid;
 444         int i;
 445
 446         outb(0, io + UART_LCR);
 447         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 448         oldmcr = inb(io + UART_MCR);
 449         outb(0, io + UART_MCR);
 450         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 451         if ((hwid = inb(io + UART_MCR)) != 0) {
 452                 outb(oldmcr, io + UART_MCR);
 453                 return MOXA_OTHER_UART;
 454         }
 455
 456         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 457         for (i = 0; i < UART_TYPE_NUM; i++) {
 458                 if (hwid == Gmoxa_uart_id[i])
 459                         return (int)hwid;
 460         }
 461         return MOXA_OTHER_UART;
 462 }
 463
 464 /* above is modified by Victor Yu. 08-15-2002 */
 465
 466 static const struct tty_operations mxser_ops = {
 467         .open = mxser_open,
 468         .close = mxser_close,
 469         .write = mxser_write,
 470         .put_char = mxser_put_char,
 471         .flush_chars = mxser_flush_chars,
 472         .write_room = mxser_write_room,
 473         .chars_in_buffer = mxser_chars_in_buffer,
 474         .flush_buffer = mxser_flush_buffer,
 475         .ioctl = mxser_ioctl,
 476         .throttle = mxser_throttle,
 477         .unthrottle = mxser_unthrottle,
 478         .set_termios = mxser_set_termios,
 479         .stop = mxser_stop,
 480         .start = mxser_start,
 481         .hangup = mxser_hangup,
 482         .break_ctl = mxser_rs_break,
 483         .wait_until_sent = mxser_wait_until_sent,
 484         .tiocmget = mxser_tiocmget,
 485         .tiocmset = mxser_tiocmset,
 486 };
 487
 488 /*
 489  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 490  */
 491
 492 static int __init mxser_module_init(void)
 493 {
 494         int ret;
 495
 496         if (verbose)
 497                 printk(KERN_DEBUG "Loading module mxser ...\n");
 498         printk(KERN_INFO "This is mxser driver version 1.9.1 and needs TESTING."
 499                 "If your are willing to test this driver, please report to "
 500                 "jirislaby@gmail.com. Thanks.\n");
 501         ret = mxser_init();
 502         if (verbose)
 503                 printk(KERN_DEBUG "Done.\n");
 504         return ret;
 505 }
 506
 507 static void __exit mxser_module_exit(void)
 508 {
 509         int i, err;
 510
 511         if (verbose)
 512                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 513
 514         err = tty_unregister_driver(mxvar_sdriver);
 515         if (!err)
 516                 put_tty_driver(mxvar_sdriver);
 517         else
 518                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 519
 520         for (i = 0; i < MXSER_BOARDS; i++) {
 521                 struct pci_dev *pdev;
 522
 523                 if (mxser_boards[i].board_type == -1)
 524                         continue;
 525                 else {
 526                         pdev = mxser_boards[i].pdev;
 527                         free_irq(mxser_boards[i].irq, &mxser_boards[i]);
 528                         if (pdev != NULL) {     /* PCI */
 529                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 530                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 531                                 pci_dev_put(pdev);
 532                         } else {
 533                                 release_region(mxser_boards[i].ports[0].ioaddr, 8 * mxser_boards[i].nports);
 534                                 release_region(mxser_boards[i].vector, 1);
 535                         }
 536                 }
 537         }
 538         if (verbose)
 539                 printk(KERN_DEBUG "Done.\n");
 540 }
 541
 542 static void process_txrx_fifo(struct mxser_port *info)
 543 {
 544         int i;
 545
 546         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 547                 info->rx_trigger = 1;
 548                 info->rx_high_water = 1;
 549                 info->rx_low_water = 1;
 550                 info->xmit_fifo_size = 1;
 551         } else
 552                 for (i = 0; i < UART_INFO_NUM; i++)
 553                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 554                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 555                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 556                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 557                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 558                                 break;
 559                         }
 560 }
 561
 562 static int __devinit mxser_initbrd(struct mxser_board *brd)
 563 {
 564         struct mxser_port *info;
 565         unsigned int i;
 566         int retval;
 567
 568         /*if (verbose) */  {
 569                 printk(" max. baud rate = %d bps.\n",
 570                         brd->ports[0].max_baud);
 571         }
 572
 573         for (i = 0; i < brd->nports; i++) {
 574                 info = &brd->ports[i];
 575                 info->board = brd;
 576                 info->stop_rx = 0;
 577                 info->ldisc_stop_rx = 0;
 578
 579                 /* Enhance mode enabled here */
 580                 if (brd->chip_flag != MOXA_OTHER_UART)
 581                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
 582
 583                 info->flags = ASYNC_SHARE_IRQ;
 584                 info->type = brd->uart_type;
 585
 586                 process_txrx_fifo(info);
 587
 588                 info->custom_divisor = info->baud_base * 16;
 589                 info->close_delay = 5 * HZ / 10;
 590                 info->closing_wait = 30 * HZ;
 591                 INIT_WORK(&info->tqueue, mxser_do_softint, info);
 592                 info->normal_termios = mxvar_sdriver->init_termios;
 593                 init_waitqueue_head(&info->open_wait);
 594                 init_waitqueue_head(&info->close_wait);
 595                 init_waitqueue_head(&info->delta_msr_wait);
 596                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 597                 info->err_shadow = 0;
 598                 spin_lock_init(&info->slock);
 599
 600                 /* before set INT ISR, disable all int */
 601                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
 602                         info->ioaddr + UART_IER);
 603         }
 604         /*
 605          * Allocate the IRQ if necessary
 606          */
 607
 608         retval = request_irq(brd->irq, mxser_interrupt,
 609                         (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
 610                         IRQF_DISABLED, "mxser", brd);
 611         if (retval) {
 612                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
 613                         "conflict with another device.\n",
 614                         mxser_brdname[brd->board_type - 1], brd->irq);
 615                 return retval;
 616         }
 617         return 0;
 618 }
 619
 620 static int __init mxser_get_PCI_conf(int board_type, struct mxser_board *brd,
 621                 struct pci_dev *pdev)
 622 {
 623         unsigned int i, j;
 624         unsigned long ioaddress;
 625
 626         /* io address */
 627         brd->board_type = board_type;
 628         brd->nports = mxser_numports[board_type - 1];
 629         ioaddress = pci_resource_start(pdev, 2);
 630         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
 631                         "mxser(IO)");
 632
 633         for (i = 0; i < brd->nports; i++)
 634                 brd->ports[i].ioaddr = ioaddress + 8 * i;
 635
 636         /* vector */
 637         ioaddress = pci_resource_start(pdev, 3);
 638         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
 639                         "mxser(vector)");
 640         brd->vector = ioaddress;
 641
 642         /* irq */
 643         brd->irq = pdev->irq;
 644
 645         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
 646         brd->uart_type = PORT_16550A;
 647         brd->vector_mask = 0;
 648
 649         for (i = 0; i < brd->nports; i++) {
 650                 for (j = 0; j < UART_INFO_NUM; j++) {
 651                         if (Gpci_uart_info[j].type == brd->chip_flag) {
 652                                 brd->ports[i].max_baud =
 653                                         Gpci_uart_info[j].max_baud;
 654
 655                                 /* exception....CP-102 */
 656                                 if (board_type == MXSER_BOARD_CP102)
 657                                         brd->ports[i].max_baud = 921600;
 658                                 break;
 659                         }
 660                 }
 661         }
 662
 663         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
 664                 for (i = 0; i < brd->nports; i++) {
 665                         if (i < 4)
 666                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
 667                         else
 668                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
 669                 }
 670                 outb(0, ioaddress + 4); /* default set to RS232 mode */
 671                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
 672         }
 673
 674         for (i = 0; i < brd->nports; i++) {
 675                 brd->vector_mask |= (1 << i);
 676                 brd->ports[i].baud_base = 921600;
 677         }
 678         return 0;
 679 }
 680
 681 static int __init mxser_init(void)
 682 {
 683         struct pci_dev *pdev = NULL;
 684         struct mxser_board *brd;
 685         unsigned int i, m;
 686         int retval, b, n;
 687
 688         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 689         if (!mxvar_sdriver)
 690                 return -ENOMEM;
 691         spin_lock_init(&gm_lock);
 692
 693         for (i = 0; i < MXSER_BOARDS; i++)
 694                 mxser_boards[i].board_type = -1;
 695
 696         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
 697                 MXSER_VERSION);
 698
 699         /* Initialize the tty_driver structure */
 700         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 701         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 702         mxvar_sdriver->name = "ttyM";
 703         mxvar_sdriver->major = ttymajor;
 704         mxvar_sdriver->minor_start = 0;
 705         mxvar_sdriver->num = MXSER_PORTS + 1;
 706         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 707         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 708         mxvar_sdriver->init_termios = tty_std_termios;
 709         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 710         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 711         tty_set_operations(mxvar_sdriver, &mxser_ops);
 712         mxvar_sdriver->ttys = mxvar_tty;
 713         mxvar_sdriver->termios = mxvar_termios;
 714         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 715
 716         mxvar_diagflag = 0;
 717         memset(mxser_boards, 0, sizeof(mxser_boards));
 718         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 719
 720         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 721         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 722         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 723
 724         m = 0;
 725         /* Start finding ISA boards here */
 726         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 727                 int cap;
 728
 729                 if (!(cap = mxserBoardCAP[b]))
 730                         continue;
 731
 732                 brd = &mxser_boards[m];
 733                 retval = mxser_get_ISA_conf(cap, brd);
 734
 735                 if (retval != 0)
 736                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 737                                 mxser_brdname[brd->board_type - 1], ioaddr[b]);
 738
 739                 if (retval <= 0) {
 740                         if (retval == MXSER_ERR_IRQ)
 741                                 printk(KERN_ERR "Invalid interrupt number, "
 742                                         "board not configured\n");
 743                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 744                                 printk(KERN_ERR "Invalid interrupt number, "
 745                                         "board not configured\n");
 746                         else if (retval == MXSER_ERR_VECTOR)
 747                                 printk(KERN_ERR "Invalid interrupt vector, "
 748                                         "board not configured\n");
 749                         else if (retval == MXSER_ERR_IOADDR)
 750                                 printk(KERN_ERR "Invalid I/O address, "
 751                                         "board not configured\n");
 752
 753                         continue;
 754                 }
 755
 756                 brd->pdev = NULL;
 757
 758                 /* mxser_initbrd will hook ISR. */
 759                 if (mxser_initbrd(brd) < 0)
 760                         continue;
 761
 762                 m++;
 763         }
 764
 765         /* Start finding ISA boards from module arg */
 766         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 767                 unsigned long cap;
 768
 769                 if (!(cap = ioaddr[b]))
 770                         continue;
 771
 772                 brd = &mxser_boards[m];
 773                 retval = mxser_get_ISA_conf(cap, &mxser_boards[m]);
 774
 775                 if (retval != 0)
 776                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 777                                 mxser_brdname[brd->board_type - 1], ioaddr[b]);
 778
 779                 if (retval <= 0) {
 780                         if (retval == MXSER_ERR_IRQ)
 781                                 printk(KERN_ERR "Invalid interrupt number, "
 782                                         "board not configured\n");
 783                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 784                                 printk(KERN_ERR "Invalid interrupt number, "
 785                                         "board not configured\n");
 786                         else if (retval == MXSER_ERR_VECTOR)
 787                                 printk(KERN_ERR "Invalid interrupt vector, "
 788                                         "board not configured\n");
 789                         else if (retval == MXSER_ERR_IOADDR)
 790                                 printk(KERN_ERR "Invalid I/O address, "
 791                                         "board not configured\n");
 792
 793                         continue;
 794                 }
 795
 796                 brd->pdev = NULL;
 797                 /* mxser_initbrd will hook ISR. */
 798                 if (mxser_initbrd(brd) < 0)
 799                         continue;
 800
 801                 m++;
 802         }
 803
 804         /* start finding PCI board here */
 805         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 806         b = 0;
 807         while (b < n) {
 808                 pdev = pci_get_device(mxser_pcibrds[b].vendor,
 809                                 mxser_pcibrds[b].device, pdev);
 810                 if (pdev == NULL) {
 811                         b++;
 812                         continue;
 813                 }
 814                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
 815                         mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
 816                         pdev->bus->number, PCI_SLOT(pdev->devfn));
 817                 if (m >= MXSER_BOARDS)
 818                         printk(KERN_ERR
 819                                 "Too many Smartio/Industio family boards find "
 820                                 "(maximum %d), board not configured\n",
 821                                 MXSER_BOARDS);
 822                 else {
 823                         if (pci_enable_device(pdev)) {
 824                                 printk(KERN_ERR "Moxa SmartI/O PCI enable "
 825                                         "fail !\n");
 826                                 continue;
 827                         }
 828                         brd = &mxser_boards[m];
 829                         brd->pdev = pdev;
 830                         retval = mxser_get_PCI_conf(
 831                                         (int)mxser_pcibrds[b].driver_data,
 832                                         brd, pdev);
 833                         if (retval < 0) {
 834                                 if (retval == MXSER_ERR_IRQ)
 835                                         printk(KERN_ERR
 836                                                 "Invalid interrupt number, "
 837                                                 "board not configured\n");
 838                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 839                                         printk(KERN_ERR
 840                                                 "Invalid interrupt number, "
 841                                                 "board not configured\n");
 842                                 else if (retval == MXSER_ERR_VECTOR)
 843                                         printk(KERN_ERR
 844                                                 "Invalid interrupt vector, "
 845                                                 "board not configured\n");
 846                                 else if (retval == MXSER_ERR_IOADDR)
 847                                         printk(KERN_ERR
 848                                                 "Invalid I/O address, "
 849                                                 "board not configured\n");
 850                                 continue;
 851                         }
 852                         /* mxser_initbrd will hook ISR. */
 853                         if (mxser_initbrd(brd) < 0)
 854                                 continue;
 855                         m++;
 856                         /* Keep an extra reference if we succeeded. It will
 857                            be returned at unload time */
 858                         pci_dev_get(pdev);
 859                 }
 860         }
 861
 862         retval = tty_register_driver(mxvar_sdriver);
 863         if (retval) {
 864                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
 865                                 " driver !\n");
 866                 put_tty_driver(mxvar_sdriver);
 867
 868                 for (i = 0; i < MXSER_BOARDS; i++) {
 869                         if (mxser_boards[i].board_type == -1)
 870                                 continue;
 871                         else {
 872                                 free_irq(mxser_boards[i].irq, &mxser_boards[i]);
 873                                 /* todo: release io, vector */
 874                         }
 875                 }
 876                 return retval;
 877         }
 878
 879         return 0;
 880 }
 881
 882 static void mxser_do_softint(void *private_)
 883 {
 884         struct mxser_port *info = private_;
 885         struct tty_struct *tty;
 886
 887         tty = info->tty;
 888
 889         if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 890                 tty_wakeup(tty);
 891         if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 892                 tty_hangup(tty);
 893 }
 894
 895 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 896 {
 897         unsigned char status = 0;
 898
 899         status = inb(baseaddr + UART_MSR);
 900
 901         mxser_msr[port] &= 0x0F;
 902         mxser_msr[port] |= status;
 903         status = mxser_msr[port];
 904         if (mode)
 905                 mxser_msr[port] = 0;
 906
 907         return status;
 908 }
 909
 910 /*
 911  * This routine is called whenever a serial port is opened.  It
 912  * enables interrupts for a serial port, linking in its async structure into
 913  * the IRQ chain.   It also performs the serial-specific
 914  * initialization for the tty structure.
 915  */
 916 static int mxser_open(struct tty_struct *tty, struct file *filp)
 917 {
 918         struct mxser_port *info;
 919         int retval, line;
 920
 921         /* initialize driver_data in case something fails */
 922         tty->driver_data = NULL;
 923
 924         line = tty->index;
 925         if (line == MXSER_PORTS)
 926                 return 0;
 927         if (line < 0 || line > MXSER_PORTS)
 928                 return -ENODEV;
 929         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
 930         if (!info->ioaddr)
 931                 return -ENODEV;
 932
 933         tty->driver_data = info;
 934         info->tty = tty;
 935         /*
 936          * Start up serial port
 937          */
 938         info->count++;
 939         retval = mxser_startup(info);
 940         if (retval)
 941                 return retval;
 942
 943         retval = mxser_block_til_ready(tty, filp, info);
 944         if (retval)
 945                 return retval;
 946
 947         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 948                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 949                         *tty->termios = info->normal_termios;
 950                 else
 951                         *tty->termios = info->callout_termios;
 952                 mxser_change_speed(info, NULL);
 953         }
 954
 955         info->session = process_session(current);
 956         info->pgrp = process_group(current);
 957
 958         /*
 959         status = mxser_get_msr(info->base, 0, info->port);
 960         mxser_check_modem_status(info, status);
 961         */
 962
 963 /* unmark here for very high baud rate (ex. 921600 bps) used */
 964         tty->low_latency = 1;
 965         return 0;
 966 }
 967
 968 /*
 969  * This routine is called when the serial port gets closed.  First, we
 970  * wait for the last remaining data to be sent.  Then, we unlink its
 971  * async structure from the interrupt chain if necessary, and we free
 972  * that IRQ if nothing is left in the chain.
 973  */
 974 static void mxser_close(struct tty_struct *tty, struct file *filp)
 975 {
 976         struct mxser_port *info = tty->driver_data;
 977
 978         unsigned long timeout;
 979         unsigned long flags;
 980         struct tty_ldisc *ld;
 981
 982         if (tty->index == MXSER_PORTS)
 983                 return;
 984         if (!info)
 985                 return;
 986
 987         spin_lock_irqsave(&info->slock, flags);
 988
 989         if (tty_hung_up_p(filp)) {
 990                 spin_unlock_irqrestore(&info->slock, flags);
 991                 return;
 992         }
 993         if ((tty->count == 1) && (info->count != 1)) {
 994                 /*
 995                  * Uh, oh.  tty->count is 1, which means that the tty
 996                  * structure will be freed.  Info->count should always
 997                  * be one in these conditions.  If it's greater than
 998                  * one, we've got real problems, since it means the
 999                  * serial port won't be shutdown.
1000                  */
1001                 printk(KERN_ERR "mxser_close: bad serial port count; "
1002                         "tty->count is 1, info->count is %d\n", info->count);
1003                 info->count = 1;
1004         }
1005         if (--info->count < 0) {
1006                 printk(KERN_ERR "mxser_close: bad serial port count for "
1007                         "ttys%d: %d\n", tty->index, info->count);
1008                 info->count = 0;
1009         }
1010         if (info->count) {
1011                 spin_unlock_irqrestore(&info->slock, flags);
1012                 return;
1013         }
1014         info->flags |= ASYNC_CLOSING;
1015         spin_unlock_irqrestore(&info->slock, flags);
1016         /*
1017          * Save the termios structure, since this port may have
1018          * separate termios for callout and dialin.
1019          */
1020         if (info->flags & ASYNC_NORMAL_ACTIVE)
1021                 info->normal_termios = *tty->termios;
1022         /*
1023          * Now we wait for the transmit buffer to clear; and we notify
1024          * the line discipline to only process XON/XOFF characters.
1025          */
1026         tty->closing = 1;
1027         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1028                 tty_wait_until_sent(tty, info->closing_wait);
1029         /*
1030          * At this point we stop accepting input.  To do this, we
1031          * disable the receive line status interrupts, and tell the
1032          * interrupt driver to stop checking the data ready bit in the
1033          * line status register.
1034          */
1035         info->IER &= ~UART_IER_RLSI;
1036         if (info->board->chip_flag)
1037                 info->IER &= ~MOXA_MUST_RECV_ISR;
1038 /* by William
1039         info->read_status_mask &= ~UART_LSR_DR;
1040 */
1041         if (info->flags & ASYNC_INITIALIZED) {
1042                 outb(info->IER, info->ioaddr + UART_IER);
1043                 /*
1044                  * Before we drop DTR, make sure the UART transmitter
1045                  * has completely drained; this is especially
1046                  * important if there is a transmit FIFO!
1047                  */
1048                 timeout = jiffies + HZ;
1049                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1050                         schedule_timeout_interruptible(5);
1051                         if (time_after(jiffies, timeout))
1052                                 break;
1053                 }
1054         }
1055         mxser_shutdown(info);
1056
1057         if (tty->driver->flush_buffer)
1058                 tty->driver->flush_buffer(tty);
1059
1060         ld = tty_ldisc_ref(tty);
1061         if (ld) {
1062                 if (ld->flush_buffer)
1063                         ld->flush_buffer(tty);
1064                 tty_ldisc_deref(ld);
1065         }
1066
1067         tty->closing = 0;
1068         info->event = 0;
1069         info->tty = NULL;
1070         if (info->blocked_open) {
1071                 if (info->close_delay)
1072                         schedule_timeout_interruptible(info->close_delay);
1073                 wake_up_interruptible(&info->open_wait);
1074         }
1075
1076         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1077         wake_up_interruptible(&info->close_wait);
1078
1079 }
1080
1081 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1082 {
1083         int c, total = 0;
1084         struct mxser_port *info = tty->driver_data;
1085         unsigned long flags;
1086
1087         if (!info->xmit_buf)
1088                 return 0;
1089
1090         while (1) {
1091                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1092                                           SERIAL_XMIT_SIZE - info->xmit_head));
1093                 if (c <= 0)
1094                         break;
1095
1096                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1097                 spin_lock_irqsave(&info->slock, flags);
1098                 info->xmit_head = (info->xmit_head + c) &
1099                                   (SERIAL_XMIT_SIZE - 1);
1100                 info->xmit_cnt += c;
1101                 spin_unlock_irqrestore(&info->slock, flags);
1102
1103                 buf += c;
1104                 count -= c;
1105                 total += c;
1106         }
1107
1108         if (info->xmit_cnt && !tty->stopped
1109                         /*&& !(info->IER & UART_IER_THRI)*/) {
1110                 if (!tty->hw_stopped ||
1111                                 (info->type == PORT_16550A) ||
1112                                 (info->board->chip_flag)) {
1113                         spin_lock_irqsave(&info->slock, flags);
1114                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1115                                         UART_IER);
1116                         info->IER |= UART_IER_THRI;
1117                         outb(info->IER, info->ioaddr + UART_IER);
1118                         spin_unlock_irqrestore(&info->slock, flags);
1119                 }
1120         }
1121         return total;
1122 }
1123
1124 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1125 {
1126         struct mxser_port *info = tty->driver_data;
1127         unsigned long flags;
1128
1129         if (!info->xmit_buf)
1130                 return;
1131
1132         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1133                 return;
1134
1135         spin_lock_irqsave(&info->slock, flags);
1136         info->xmit_buf[info->xmit_head++] = ch;
1137         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1138         info->xmit_cnt++;
1139         spin_unlock_irqrestore(&info->slock, flags);
1140         if (!tty->stopped /*&& !(info->IER & UART_IER_THRI)*/) {
1141                 if (!tty->hw_stopped ||
1142                                 (info->type == PORT_16550A) ||
1143                                 info->board->chip_flag) {
1144                         spin_lock_irqsave(&info->slock, flags);
1145                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1146                         info->IER |= UART_IER_THRI;
1147                         outb(info->IER, info->ioaddr + UART_IER);
1148                         spin_unlock_irqrestore(&info->slock, flags);
1149                 }
1150         }
1151 }
1152
1153
1154 static void mxser_flush_chars(struct tty_struct *tty)
1155 {
1156         struct mxser_port *info = tty->driver_data;
1157         unsigned long flags;
1158
1159         if (info->xmit_cnt <= 0 ||
1160                         tty->stopped ||
1161                         !info->xmit_buf ||
1162                         (tty->hw_stopped &&
1163                          (info->type != PORT_16550A) &&
1164                          (!info->board->chip_flag)
1165                         ))
1166                 return;
1167
1168         spin_lock_irqsave(&info->slock, flags);
1169
1170         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1171         info->IER |= UART_IER_THRI;
1172         outb(info->IER, info->ioaddr + UART_IER);
1173
1174         spin_unlock_irqrestore(&info->slock, flags);
1175 }
1176
1177 static int mxser_write_room(struct tty_struct *tty)
1178 {
1179         struct mxser_port *info = tty->driver_data;
1180         int ret;
1181
1182         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1183         if (ret < 0)
1184                 ret = 0;
1185         return ret;
1186 }
1187
1188 static int mxser_chars_in_buffer(struct tty_struct *tty)
1189 {
1190         struct mxser_port *info = tty->driver_data;
1191         int len = info->xmit_cnt;
1192
1193         if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE))
1194                 len++;
1195
1196         return len;
1197 }
1198
1199 static void mxser_flush_buffer(struct tty_struct *tty)
1200 {
1201         struct mxser_port *info = tty->driver_data;
1202         char fcr;
1203         unsigned long flags;
1204
1205
1206         spin_lock_irqsave(&info->slock, flags);
1207         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1208
1209         /* below added by shinhay */
1210         fcr = inb(info->ioaddr + UART_FCR);
1211         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1212                 info->ioaddr + UART_FCR);
1213         outb(fcr, info->ioaddr + UART_FCR);
1214
1215         spin_unlock_irqrestore(&info->slock, flags);
1216         /* above added by shinhay */
1217
1218         wake_up_interruptible(&tty->write_wait);
1219         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1220                 (tty->ldisc.write_wakeup) (tty);
1221 }
1222
1223 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1224 {
1225         struct mxser_port *info = tty->driver_data;
1226         int retval;
1227         struct async_icount cprev, cnow;        /* kernel counter temps */
1228         struct serial_icounter_struct __user *p_cuser;
1229         unsigned long templ;
1230         unsigned long flags;
1231         void __user *argp = (void __user *)arg;
1232
1233         if (tty->index == MXSER_PORTS)
1234                 return mxser_ioctl_special(cmd, argp);
1235
1236         /* following add by Victor Yu. 01-05-2004 */
1237         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1238                 int p;
1239                 unsigned long opmode;
1240                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1241                 int shiftbit;
1242                 unsigned char val, mask;
1243
1244                 p = tty->index % 4;
1245                 if (cmd == MOXA_SET_OP_MODE) {
1246                         if (get_user(opmode, (int __user *) argp))
1247                                 return -EFAULT;
1248                         if (opmode != RS232_MODE &&
1249                                         opmode != RS485_2WIRE_MODE &&
1250                                         opmode != RS422_MODE &&
1251                                         opmode != RS485_4WIRE_MODE)
1252                                 return -EFAULT;
1253                         mask = ModeMask[p];
1254                         shiftbit = p * 2;
1255                         val = inb(info->opmode_ioaddr);
1256                         val &= mask;
1257                         val |= (opmode << shiftbit);
1258                         outb(val, info->opmode_ioaddr);
1259                 } else {
1260                         shiftbit = p * 2;
1261                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1262                         opmode &= OP_MODE_MASK;
1263                         if (copy_to_user(argp, &opmode, sizeof(int)))
1264                                 return -EFAULT;
1265                 }
1266                 return 0;
1267         }
1268         /* above add by Victor Yu. 01-05-2004 */
1269
1270         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1271                 if (tty->flags & (1 << TTY_IO_ERROR))
1272                         return -EIO;
1273         }
1274         switch (cmd) {
1275         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1276                 retval = tty_check_change(tty);
1277                 if (retval)
1278                         return retval;
1279                 tty_wait_until_sent(tty, 0);
1280                 if (!arg)
1281                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1282                 return 0;
1283         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1284                 retval = tty_check_change(tty);
1285                 if (retval)
1286                         return retval;
1287                 tty_wait_until_sent(tty, 0);
1288                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1289                 return 0;
1290         case TIOCGSOFTCAR:
1291                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1292         case TIOCSSOFTCAR:
1293                 if (get_user(templ, (unsigned long __user *) argp))
1294                         return -EFAULT;
1295                 arg = templ;
1296                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1297                 return 0;
1298         case TIOCGSERIAL:
1299                 return mxser_get_serial_info(info, argp);
1300         case TIOCSSERIAL:
1301                 return mxser_set_serial_info(info, argp);
1302         case TIOCSERGETLSR:     /* Get line status register */
1303                 return mxser_get_lsr_info(info, argp);
1304                 /*
1305                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1306                  * - mask passed in arg for lines of interest
1307                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1308                  * Caller should use TIOCGICOUNT to see which one it was
1309                  */
1310         case TIOCMIWAIT: {
1311                         DECLARE_WAITQUEUE(wait, current);
1312                         int ret;
1313                         spin_lock_irqsave(&info->slock, flags);
1314                         cprev = info->icount;   /* note the counters on entry */
1315                         spin_unlock_irqrestore(&info->slock, flags);
1316
1317                         add_wait_queue(&info->delta_msr_wait, &wait);
1318                         while (1) {
1319                                 spin_lock_irqsave(&info->slock, flags);
1320                                 cnow = info->icount;    /* atomic copy */
1321                                 spin_unlock_irqrestore(&info->slock, flags);
1322
1323                                 set_current_state(TASK_INTERRUPTIBLE);
1324                                 if (((arg & TIOCM_RNG) &&
1325                                                 (cnow.rng != cprev.rng)) ||
1326                                                 ((arg & TIOCM_DSR) &&
1327                                                 (cnow.dsr != cprev.dsr)) ||
1328                                                 ((arg & TIOCM_CD) &&
1329                                                 (cnow.dcd != cprev.dcd)) ||
1330                                                 ((arg & TIOCM_CTS) &&
1331                                                 (cnow.cts != cprev.cts))) {
1332                                         ret = 0;
1333                                         break;
1334                                 }
1335                                 /* see if a signal did it */
1336                                 if (signal_pending(current)) {
1337                                         ret = -ERESTARTSYS;
1338                                         break;
1339                                 }
1340                                 cprev = cnow;
1341                         }
1342                         current->state = TASK_RUNNING;
1343                         remove_wait_queue(&info->delta_msr_wait, &wait);
1344                         break;
1345                 }
1346                 /* NOTREACHED */
1347                 /*
1348                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1349                  * Return: write counters to the user passed counter struct
1350                  * NB: both 1->0 and 0->1 transitions are counted except for
1351                  *     RI where only 0->1 is counted.
1352                  */
1353         case TIOCGICOUNT:
1354                 spin_lock_irqsave(&info->slock, flags);
1355                 cnow = info->icount;
1356                 spin_unlock_irqrestore(&info->slock, flags);
1357                 p_cuser = argp;
1358                 /* modified by casper 1/11/2000 */
1359                 if (put_user(cnow.frame, &p_cuser->frame))
1360                         return -EFAULT;
1361                 if (put_user(cnow.brk, &p_cuser->brk))
1362                         return -EFAULT;
1363                 if (put_user(cnow.overrun, &p_cuser->overrun))
1364                         return -EFAULT;
1365                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1366                         return -EFAULT;
1367                 if (put_user(cnow.parity, &p_cuser->parity))
1368                         return -EFAULT;
1369                 if (put_user(cnow.rx, &p_cuser->rx))
1370                         return -EFAULT;
1371                 if (put_user(cnow.tx, &p_cuser->tx))
1372                         return -EFAULT;
1373                 put_user(cnow.cts, &p_cuser->cts);
1374                 put_user(cnow.dsr, &p_cuser->dsr);
1375                 put_user(cnow.rng, &p_cuser->rng);
1376                 put_user(cnow.dcd, &p_cuser->dcd);
1377                 return 0;
1378         case MOXA_HighSpeedOn:
1379                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1380         case MOXA_SDS_RSTICOUNTER: {
1381                         info->mon_data.rxcnt = 0;
1382                         info->mon_data.txcnt = 0;
1383                         return 0;
1384                 }
1385 /* (above) added by James. */
1386         case MOXA_ASPP_SETBAUD:{
1387                         long baud;
1388                         if (get_user(baud, (long __user *)argp))
1389                                 return -EFAULT;
1390                         mxser_set_baud(info, baud);
1391                         return 0;
1392                 }
1393         case MOXA_ASPP_GETBAUD:
1394                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1395                         return -EFAULT;
1396
1397                 return 0;
1398
1399         case MOXA_ASPP_OQUEUE:{
1400                         int len, lsr;
1401
1402                         len = mxser_chars_in_buffer(tty);
1403
1404                         lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1405
1406                         len += (lsr ? 0 : 1);
1407
1408                         if (copy_to_user(argp, &len, sizeof(int)))
1409                                 return -EFAULT;
1410
1411                         return 0;
1412                 }
1413         case MOXA_ASPP_MON: {
1414                         int mcr, status;
1415
1416                         /* info->mon_data.ser_param = tty->termios->c_cflag; */
1417
1418                         status = mxser_get_msr(info->ioaddr, 1, tty->index);
1419                         mxser_check_modem_status(info, status);
1420
1421                         mcr = inb(info->ioaddr + UART_MCR);
1422                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1423                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1424                         else
1425                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1426
1427                         if (mcr & MOXA_MUST_MCR_TX_XON)
1428                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1429                         else
1430                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1431
1432                         if (info->tty->hw_stopped)
1433                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1434                         else
1435                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1436
1437                         if (copy_to_user(argp, &info->mon_data,
1438                                         sizeof(struct mxser_mon)))
1439                                 return -EFAULT;
1440
1441                         return 0;
1442                 }
1443
1444         case MOXA_ASPP_LSTATUS: {
1445                         if (copy_to_user(argp, &info->err_shadow,
1446                                         sizeof(unsigned char)))
1447                                 return -EFAULT;
1448
1449                         info->err_shadow = 0;
1450                         return 0;
1451                 }
1452         case MOXA_SET_BAUD_METHOD: {
1453                         int method;
1454
1455                         if (get_user(method, (int __user *)argp))
1456                                 return -EFAULT;
1457                         mxser_set_baud_method[tty->index] = method;
1458                         if (copy_to_user(argp, &method, sizeof(int)))
1459                                 return -EFAULT;
1460
1461                         return 0;
1462                 }
1463         default:
1464                 return -ENOIOCTLCMD;
1465         }
1466         return 0;
1467 }
1468
1469 #ifndef CMSPAR
1470 #define CMSPAR 010000000000
1471 #endif
1472
1473 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1474 {
1475         struct mxser_port *port;
1476         int result, status;
1477         unsigned int i, j;
1478
1479         switch (cmd) {
1480         case MOXA_GET_CONF:
1481 /*              if (copy_to_user(argp, mxsercfg,
1482                                 sizeof(struct mxser_hwconf) * 4))
1483                         return -EFAULT;
1484                 return 0;*/
1485                 return -ENXIO;
1486         case MOXA_GET_MAJOR:
1487                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1488                         return -EFAULT;
1489                 return 0;
1490
1491         case MOXA_GET_CUMAJOR:
1492                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1493                         return -EFAULT;
1494                 return 0;
1495
1496         case MOXA_CHKPORTENABLE:
1497                 result = 0;
1498
1499                 for (i = 0; i < MXSER_BOARDS; i++)
1500                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1501                                 if (mxser_boards[i].ports[j].ioaddr)
1502                                         result |= (1 << i);
1503
1504                 return put_user(result, (unsigned long __user *)argp);
1505         case MOXA_GETDATACOUNT:
1506                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1507                         return -EFAULT;
1508                 return 0;
1509         case MOXA_GETMSTATUS:
1510                 for (i = 0; i < MXSER_BOARDS; i++)
1511                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1512                                 port = &mxser_boards[i].ports[j];
1513
1514                                 GMStatus[i].ri = 0;
1515                                 if (!port->ioaddr) {
1516                                         GMStatus[i].dcd = 0;
1517                                         GMStatus[i].dsr = 0;
1518                                         GMStatus[i].cts = 0;
1519                                         continue;
1520                                 }
1521
1522                                 if (!port->tty || !port->tty->termios)
1523                                         GMStatus[i].cflag =
1524                                                 port->normal_termios.c_cflag;
1525                                 else
1526                                         GMStatus[i].cflag =
1527                                                 port->tty->termios->c_cflag;
1528
1529                                 status = inb(port->ioaddr + UART_MSR);
1530                                 if (status & 0x80 /*UART_MSR_DCD */ )
1531                                         GMStatus[i].dcd = 1;
1532                                 else
1533                                         GMStatus[i].dcd = 0;
1534
1535                                 if (status & 0x20 /*UART_MSR_DSR */ )
1536                                         GMStatus[i].dsr = 1;
1537                                 else
1538                                         GMStatus[i].dsr = 0;
1539
1540
1541                                 if (status & 0x10 /*UART_MSR_CTS */ )
1542                                         GMStatus[i].cts = 1;
1543                                 else
1544                                         GMStatus[i].cts = 0;
1545                         }
1546                 if (copy_to_user(argp, GMStatus,
1547                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1548                         return -EFAULT;
1549                 return 0;
1550         case MOXA_ASPP_MON_EXT: {
1551                 int status, p, shiftbit;
1552                 unsigned long opmode;
1553                 unsigned cflag, iflag;
1554
1555                 for (i = 0; i < MXSER_BOARDS; i++)
1556                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1557                                 port = &mxser_boards[i].ports[j];
1558                                 if (!port->ioaddr)
1559                                         continue;
1560
1561                                 status = mxser_get_msr(port->ioaddr, 0, i);
1562 /*                              mxser_check_modem_status(port, status); */
1563
1564                                 if (status & UART_MSR_TERI)
1565                                         port->icount.rng++;
1566                                 if (status & UART_MSR_DDSR)
1567                                         port->icount.dsr++;
1568                                 if (status & UART_MSR_DDCD)
1569                                         port->icount.dcd++;
1570                                 if (status & UART_MSR_DCTS)
1571                                         port->icount.cts++;
1572
1573                                 port->mon_data.modem_status = status;
1574                                 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1575                                 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1576                                 mon_data_ext.up_rxcnt[i] =
1577                                         port->mon_data.up_rxcnt;
1578                                 mon_data_ext.up_txcnt[i] =
1579                                         port->mon_data.up_txcnt;
1580                                 mon_data_ext.modem_status[i] =
1581                                         port->mon_data.modem_status;
1582                                 mon_data_ext.baudrate[i] = port->realbaud;
1583
1584                                 if (!port->tty || !port->tty->termios) {
1585                                         cflag = port->normal_termios.c_cflag;
1586                                         iflag = port->normal_termios.c_iflag;
1587                                 } else {
1588                                         cflag = port->tty->termios->c_cflag;
1589                                         iflag = port->tty->termios->c_iflag;
1590                                 }
1591
1592                                 mon_data_ext.databits[i] = cflag & CSIZE;
1593
1594                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1595
1596                                 mon_data_ext.parity[i] =
1597                                         cflag & (PARENB | PARODD | CMSPAR);
1598
1599                                 mon_data_ext.flowctrl[i] = 0x00;
1600
1601                                 if (cflag & CRTSCTS)
1602                                         mon_data_ext.flowctrl[i] |= 0x03;
1603
1604                                 if (iflag & (IXON | IXOFF))
1605                                         mon_data_ext.flowctrl[i] |= 0x0C;
1606
1607                                 if (port->type == PORT_16550A)
1608                                         mon_data_ext.fifo[i] = 1;
1609                                 else
1610                                         mon_data_ext.fifo[i] = 0;
1611
1612                                 p = i % 4;
1613                                 shiftbit = p * 2;
1614                                 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1615                                 opmode &= OP_MODE_MASK;
1616
1617                                 mon_data_ext.iftype[i] = opmode;
1618
1619                         }
1620                         if (copy_to_user(argp, &mon_data_ext,
1621                                                 sizeof(mon_data_ext)))
1622                                 return -EFAULT;
1623
1624                         return 0;
1625
1626         } default:
1627                 return -ENOIOCTLCMD;
1628         }
1629         return 0;
1630 }
1631
1632 static void mxser_stoprx(struct tty_struct *tty)
1633 {
1634         struct mxser_port *info = tty->driver_data;
1635
1636         info->ldisc_stop_rx = 1;
1637         if (I_IXOFF(tty)) {
1638                 /* following add by Victor Yu. 09-02-2002 */
1639                 if (info->board->chip_flag) {
1640                         info->IER &= ~MOXA_MUST_RECV_ISR;
1641                         outb(info->IER, info->ioaddr + UART_IER);
1642                 } else if (!(info->flags & ASYNC_CLOSING)) {
1643                         info->x_char = STOP_CHAR(tty);
1644                         outb(0, info->ioaddr + UART_IER);
1645                         info->IER |= UART_IER_THRI;
1646                         outb(info->IER, info->ioaddr + UART_IER);
1647                 }
1648         }
1649
1650         if (info->tty->termios->c_cflag & CRTSCTS) {
1651                 info->MCR &= ~UART_MCR_RTS;
1652                 outb(info->MCR, info->ioaddr + UART_MCR);
1653         }
1654 }
1655
1656 static void mxser_startrx(struct tty_struct *tty)
1657 {
1658         struct mxser_port *info = tty->driver_data;
1659
1660         info->ldisc_stop_rx = 0;
1661         if (I_IXOFF(tty)) {
1662                 if (info->x_char)
1663                         info->x_char = 0;
1664                 else {
1665                         /* following add by Victor Yu. 09-02-2002 */
1666                         if (info->board->chip_flag) {
1667                                 info->IER |= MOXA_MUST_RECV_ISR;
1668                                 outb(info->IER, info->ioaddr + UART_IER);
1669                         } else if (!(info->flags & ASYNC_CLOSING)) {
1670                                 info->x_char = START_CHAR(tty);
1671                                 outb(0, info->ioaddr + UART_IER);
1672                                 info->IER |= UART_IER_THRI;
1673                                 outb(info->IER, info->ioaddr + UART_IER);
1674                         }
1675                 }
1676         }
1677
1678         if (info->tty->termios->c_cflag & CRTSCTS) {
1679                 info->MCR |= UART_MCR_RTS;
1680                 outb(info->MCR, info->ioaddr + UART_MCR);
1681         }
1682 }
1683
1684 /*
1685  * This routine is called by the upper-layer tty layer to signal that
1686  * incoming characters should be throttled.
1687  */
1688 static void mxser_throttle(struct tty_struct *tty)
1689 {
1690         struct mxser_port *info = tty->driver_data;
1691         unsigned long flags;
1692
1693         spin_lock_irqsave(&info->slock, flags);
1694         mxser_stoprx(tty);
1695         spin_unlock_irqrestore(&info->slock, flags);
1696 }
1697
1698 static void mxser_unthrottle(struct tty_struct *tty)
1699 {
1700         struct mxser_port *info = tty->driver_data;
1701         unsigned long flags;
1702
1703         spin_lock_irqsave(&info->slock, flags);
1704         mxser_startrx(tty);
1705         spin_unlock_irqrestore(&info->slock, flags);
1706 }
1707
1708 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1709 {
1710         struct mxser_port *info = tty->driver_data;
1711         unsigned long flags;
1712
1713         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1714                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1715
1716                 mxser_change_speed(info, old_termios);
1717
1718                 if ((old_termios->c_cflag & CRTSCTS) &&
1719                                 !(tty->termios->c_cflag & CRTSCTS)) {
1720                         tty->hw_stopped = 0;
1721                         mxser_start(tty);
1722                 }
1723         }
1724
1725 /* Handle sw stopped */
1726         if ((old_termios->c_iflag & IXON) &&
1727                         !(tty->termios->c_iflag & IXON)) {
1728                 tty->stopped = 0;
1729
1730                 /* following add by Victor Yu. 09-02-2002 */
1731                 if (info->board->chip_flag) {
1732                         spin_lock_irqsave(&info->slock, flags);
1733                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1734                         spin_unlock_irqrestore(&info->slock, flags);
1735                 }
1736                 /* above add by Victor Yu. 09-02-2002 */
1737
1738                 mxser_start(tty);
1739         }
1740 }
1741
1742 /*
1743  * mxser_stop() and mxser_start()
1744  *
1745  * This routines are called before setting or resetting tty->stopped.
1746  * They enable or disable transmitter interrupts, as necessary.
1747  */
1748 static void mxser_stop(struct tty_struct *tty)
1749 {
1750         struct mxser_port *info = tty->driver_data;
1751         unsigned long flags;
1752
1753         spin_lock_irqsave(&info->slock, flags);
1754         if (info->IER & UART_IER_THRI) {
1755                 info->IER &= ~UART_IER_THRI;
1756                 outb(info->IER, info->ioaddr + UART_IER);
1757         }
1758         spin_unlock_irqrestore(&info->slock, flags);
1759 }
1760
1761 static void mxser_start(struct tty_struct *tty)
1762 {
1763         struct mxser_port *info = tty->driver_data;
1764         unsigned long flags;
1765
1766         spin_lock_irqsave(&info->slock, flags);
1767         if (info->xmit_cnt && info->xmit_buf
1768                         /* && !(info->IER & UART_IER_THRI) */) {
1769                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1770                 info->IER |= UART_IER_THRI;
1771                 outb(info->IER, info->ioaddr + UART_IER);
1772         }
1773         spin_unlock_irqrestore(&info->slock, flags);
1774 }
1775
1776 /*
1777  * mxser_wait_until_sent() --- wait until the transmitter is empty
1778  */
1779 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1780 {
1781         struct mxser_port *info = tty->driver_data;
1782         unsigned long orig_jiffies, char_time;
1783         int lsr;
1784
1785         if (info->type == PORT_UNKNOWN)
1786                 return;
1787
1788         if (info->xmit_fifo_size == 0)
1789                 return;         /* Just in case.... */
1790
1791         orig_jiffies = jiffies;
1792         /*
1793          * Set the check interval to be 1/5 of the estimated time to
1794          * send a single character, and make it at least 1.  The check
1795          * interval should also be less than the timeout.
1796          *
1797          * Note: we have to use pretty tight timings here to satisfy
1798          * the NIST-PCTS.
1799          */
1800         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1801         char_time = char_time / 5;
1802         if (char_time == 0)
1803                 char_time = 1;
1804         if (timeout && timeout < char_time)
1805                 char_time = timeout;
1806         /*
1807          * If the transmitter hasn't cleared in twice the approximate
1808          * amount of time to send the entire FIFO, it probably won't
1809          * ever clear.  This assumes the UART isn't doing flow
1810          * control, which is currently the case.  Hence, if it ever
1811          * takes longer than info->timeout, this is probably due to a
1812          * UART bug of some kind.  So, we clamp the timeout parameter at
1813          * 2*info->timeout.
1814          */
1815         if (!timeout || timeout > 2 * info->timeout)
1816                 timeout = 2 * info->timeout;
1817 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1818         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1819                 timeout, char_time);
1820         printk("jiff=%lu...", jiffies);
1821 #endif
1822         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1823 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1824                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1825 #endif
1826                 schedule_timeout_interruptible(char_time);
1827                 if (signal_pending(current))
1828                         break;
1829                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1830                         break;
1831         }
1832         set_current_state(TASK_RUNNING);
1833
1834 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1835         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1836 #endif
1837 }
1838
1839
1840 /*
1841  * This routine is called by tty_hangup() when a hangup is signaled.
1842  */
1843 void mxser_hangup(struct tty_struct *tty)
1844 {
1845         struct mxser_port *info = tty->driver_data;
1846
1847         mxser_flush_buffer(tty);
1848         mxser_shutdown(info);
1849         info->event = 0;
1850         info->count = 0;
1851         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1852         info->tty = NULL;
1853         wake_up_interruptible(&info->open_wait);
1854 }
1855
1856
1857 /* added by James 03-12-2004. */
1858 /*
1859  * mxser_rs_break() --- routine which turns the break handling on or off
1860  */
1861 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1862 {
1863         struct mxser_port *info = tty->driver_data;
1864         unsigned long flags;
1865
1866         spin_lock_irqsave(&info->slock, flags);
1867         if (break_state == -1)
1868                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1869                         info->ioaddr + UART_LCR);
1870         else
1871                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1872                         info->ioaddr + UART_LCR);
1873         spin_unlock_irqrestore(&info->slock, flags);
1874 }
1875
1876 /* (above) added by James. */
1877
1878
1879 /*
1880  * This is the serial driver's generic interrupt routine
1881  */
1882 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1883 {
1884         int status, iir, i;
1885         struct mxser_board *brd = NULL;
1886         struct mxser_port *port;
1887         int max, irqbits, bits, msr;
1888         int pass_counter = 0;
1889         unsigned int int_cnt;
1890         int handled = IRQ_NONE;
1891
1892         /* spin_lock(&gm_lock); */
1893
1894         for (i = 0; i < MXSER_BOARDS; i++)
1895                 if (dev_id == &mxser_boards[i]) {
1896                         brd = dev_id;
1897                         break;
1898                 }
1899
1900         if (i == MXSER_BOARDS)
1901                 goto irq_stop;
1902         if (brd == NULL)
1903                 goto irq_stop;
1904         max = mxser_numports[brd->board_type - 1];
1905         while (1) {
1906                 irqbits = inb(brd->vector) & brd->vector_mask;
1907                 if (irqbits == brd->vector_mask)
1908                         break;
1909
1910                 handled = IRQ_HANDLED;
1911                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1912                         if (irqbits == brd->vector_mask)
1913                                 break;
1914                         if (bits & irqbits)
1915                                 continue;
1916                         port = &brd->ports[i];
1917
1918                         int_cnt = 0;
1919                         do {
1920                                 /* following add by Victor Yu. 09-13-2002 */
1921                                 iir = inb(port->ioaddr + UART_IIR);
1922                                 if (iir & UART_IIR_NO_INT)
1923                                         break;
1924                                 iir &= MOXA_MUST_IIR_MASK;
1925                                 if (!port->tty) {
1926                                         status = inb(port->ioaddr + UART_LSR);
1927                                         outb(0x27, port->ioaddr + UART_FCR);
1928                                         inb(port->ioaddr + UART_MSR);
1929                                         break;
1930                                 }
1931                                 /* above add by Victor Yu. 09-13-2002 */
1932
1933                                 spin_lock(&port->slock);
1934                                 /* following add by Victor Yu. 09-02-2002 */
1935                                 status = inb(port->ioaddr + UART_LSR);
1936
1937                                 if (status & UART_LSR_PE)
1938                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
1939                                 if (status & UART_LSR_FE)
1940                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
1941                                 if (status & UART_LSR_OE)
1942                                         port->err_shadow |=
1943                                                 NPPI_NOTIFY_HW_OVERRUN;
1944                                 if (status & UART_LSR_BI)
1945                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
1946
1947                                 if (port->board->chip_flag) {
1948                                         /*
1949                                            if ( (status & 0x02) && !(status & 0x01) ) {
1950                                            outb(port->ioaddr+UART_FCR,  0x23);
1951                                            continue;
1952                                            }
1953                                          */
1954                                         if (iir == MOXA_MUST_IIR_GDA ||
1955                                             iir == MOXA_MUST_IIR_RDA ||
1956                                             iir == MOXA_MUST_IIR_RTO ||
1957                                             iir == MOXA_MUST_IIR_LSR)
1958                                                 mxser_receive_chars(port,
1959                                                                 &status);
1960
1961                                 } else {
1962                                         /* above add by Victor Yu. 09-02-2002 */
1963
1964                                         status &= port->read_status_mask;
1965                                         if (status & UART_LSR_DR)
1966                                                 mxser_receive_chars(port,
1967                                                                 &status);
1968                                 }
1969                                 msr = inb(port->ioaddr + UART_MSR);
1970                                 if (msr & UART_MSR_ANY_DELTA)
1971                                         mxser_check_modem_status(port, msr);
1972
1973                                 /* following add by Victor Yu. 09-13-2002 */
1974                                 if (port->board->chip_flag) {
1975                                         if (iir == 0x02 && (status &
1976                                                                 UART_LSR_THRE))
1977                                                 mxser_transmit_chars(port);
1978                                 } else {
1979                                         /* above add by Victor Yu. 09-13-2002 */
1980
1981                                         if (status & UART_LSR_THRE)
1982                                                 mxser_transmit_chars(port);
1983                                 }
1984                                 spin_unlock(&port->slock);
1985                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
1986                 }
1987                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
1988                         break;  /* Prevent infinite loops */
1989         }
1990
1991       irq_stop:
1992         /* spin_unlock(&gm_lock); */
1993         return handled;
1994 }
1995
1996 static void mxser_receive_chars(struct mxser_port *port, int *status)
1997 {
1998         struct tty_struct *tty = port->tty;
1999         unsigned char ch, gdl;
2000         int ignored = 0;
2001         int cnt = 0;
2002         int recv_room;
2003         int max = 256;
2004         unsigned long flags;
2005
2006         spin_lock_irqsave(&port->slock, flags);
2007
2008         recv_room = tty->receive_room;
2009         if ((recv_room == 0) && (!port->ldisc_stop_rx)) {
2010                 /* mxser_throttle(tty); */
2011                 mxser_stoprx(tty);
2012                 /* return; */
2013         }
2014
2015         /* following add by Victor Yu. 09-02-2002 */
2016         if (port->board->chip_flag != MOXA_OTHER_UART) {
2017
2018                 if (*status & UART_LSR_SPECIAL)
2019                         goto intr_old;
2020                 /* following add by Victor Yu. 02-11-2004 */
2021                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2022                                 (*status & MOXA_MUST_LSR_RERR))
2023                         goto intr_old;
2024                 /* above add by Victor Yu. 02-14-2004 */
2025                 if (*status & MOXA_MUST_LSR_RERR)
2026                         goto intr_old;
2027
2028                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2029
2030                 /* add by Victor Yu. 02-11-2004 */
2031                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2032                         gdl &= MOXA_MUST_GDL_MASK;
2033                 if (gdl >= recv_room) {
2034                         if (!port->ldisc_stop_rx) {
2035                                 /* mxser_throttle(tty); */
2036                                 mxser_stoprx(tty);
2037                         }
2038                         /* return; */
2039                 }
2040                 while (gdl--) {
2041                         ch = inb(port->ioaddr + UART_RX);
2042                         tty_insert_flip_char(tty, ch, 0);
2043                         cnt++;
2044                 }
2045                 goto end_intr;
2046         }
2047  intr_old:
2048         /* above add by Victor Yu. 09-02-2002 */
2049
2050         do {
2051                 if (max-- < 0)
2052                         break;
2053
2054                 ch = inb(port->ioaddr + UART_RX);
2055                 /* following add by Victor Yu. 09-02-2002 */
2056                 if (port->board->chip_flag && (*status & UART_LSR_OE)
2057                                 /*&& !(*status&UART_LSR_DR) */)
2058                         outb(0x23, port->ioaddr + UART_FCR);
2059                 *status &= port->read_status_mask;
2060                 /* above add by Victor Yu. 09-02-2002 */
2061                 if (*status & port->ignore_status_mask) {
2062                         if (++ignored > 100)
2063                                 break;
2064                 } else {
2065                         char flag = 0;
2066                         if (*status & UART_LSR_SPECIAL) {
2067                                 if (*status & UART_LSR_BI) {
2068                                         flag = TTY_BREAK;
2069 /* added by casper 1/11/2000 */
2070                                         port->icount.brk++;
2071
2072                                         if (port->flags & ASYNC_SAK)
2073                                                 do_SAK(tty);
2074                                 } else if (*status & UART_LSR_PE) {
2075                                         flag = TTY_PARITY;
2076 /* added by casper 1/11/2000 */
2077                                         port->icount.parity++;
2078                                 } else if (*status & UART_LSR_FE) {
2079                                         flag = TTY_FRAME;
2080 /* added by casper 1/11/2000 */
2081                                         port->icount.frame++;
2082                                 } else if (*status & UART_LSR_OE) {
2083                                         flag = TTY_OVERRUN;
2084 /* added by casper 1/11/2000 */
2085                                         port->icount.overrun++;
2086                                 } else
2087                                         flags = TTY_BREAK;
2088                         } else
2089                                 flags = 0;
2090                         tty_insert_flip_char(tty, ch, flag);
2091                         cnt++;
2092                         if (cnt >= recv_room) {
2093                                 if (!port->ldisc_stop_rx) {
2094                                         /* mxser_throttle(tty); */
2095                                         mxser_stoprx(tty);
2096                                 }
2097                                 break;
2098                         }
2099
2100                 }
2101
2102                 /* following add by Victor Yu. 09-02-2002 */
2103                 if (port->board->chip_flag)
2104                         break;
2105
2106                 /* mask by Victor Yu. 09-02-2002
2107                  *status = inb(port->ioaddr + UART_LSR) & port->read_status_mask;
2108                  */
2109                 /* following add by Victor Yu. 09-02-2002 */
2110                 *status = inb(port->ioaddr + UART_LSR);
2111                 /* above add by Victor Yu. 09-02-2002 */
2112         } while (*status & UART_LSR_DR);
2113
2114 end_intr:               /* add by Victor Yu. 09-02-2002 */
2115         mxvar_log.rxcnt[port->tty->index] += cnt;
2116         port->mon_data.rxcnt += cnt;
2117         port->mon_data.up_rxcnt += cnt;
2118         spin_unlock_irqrestore(&port->slock, flags);
2119
2120         tty_flip_buffer_push(tty);
2121 }
2122
2123 static void mxser_transmit_chars(struct mxser_port *port)
2124 {
2125         int count, cnt;
2126         unsigned long flags;
2127
2128         spin_lock_irqsave(&port->slock, flags);
2129
2130         if (port->x_char) {
2131                 outb(port->x_char, port->ioaddr + UART_TX);
2132                 port->x_char = 0;
2133                 mxvar_log.txcnt[port->tty->index]++;
2134                 port->mon_data.txcnt++;
2135                 port->mon_data.up_txcnt++;
2136
2137 /* added by casper 1/11/2000 */
2138                 port->icount.tx++;
2139                 goto unlock;
2140         }
2141
2142         if (port->xmit_buf == 0)
2143                 goto unlock;
2144
2145         if (port->xmit_cnt == 0) {
2146                 if (port->xmit_cnt < WAKEUP_CHARS) { /* XXX what's this for?? */
2147                         set_bit(MXSER_EVENT_TXLOW, &port->event);
2148                         schedule_work(&port->tqueue);
2149                 }
2150                 goto unlock;
2151         }
2152         if (port->tty->stopped || (port->tty->hw_stopped &&
2153                         (port->type != PORT_16550A) &&
2154                         (!port->board->chip_flag))) {
2155                 port->IER &= ~UART_IER_THRI;
2156                 outb(port->IER, port->ioaddr + UART_IER);
2157                 goto unlock;
2158         }
2159
2160         cnt = port->xmit_cnt;
2161         count = port->xmit_fifo_size;
2162         do {
2163                 outb(port->xmit_buf[port->xmit_tail++],
2164                         port->ioaddr + UART_TX);
2165                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2166                 if (--port->xmit_cnt <= 0)
2167                         break;
2168         } while (--count > 0);
2169         mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2170
2171 /* added by James 03-12-2004. */
2172         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2173         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2174
2175 /* added by casper 1/11/2000 */
2176         port->icount.tx += (cnt - port->xmit_cnt);
2177
2178         if (port->xmit_cnt < WAKEUP_CHARS) {
2179                 set_bit(MXSER_EVENT_TXLOW, &port->event);
2180                 schedule_work(&port->tqueue);
2181         }
2182         if (port->xmit_cnt <= 0) {
2183                 port->IER &= ~UART_IER_THRI;
2184                 outb(port->IER, port->ioaddr + UART_IER);
2185         }
2186 unlock:
2187         spin_unlock_irqrestore(&port->slock, flags);
2188 }
2189
2190 static void mxser_check_modem_status(struct mxser_port *port, int status)
2191 {
2192         /* update input line counters */
2193         if (status & UART_MSR_TERI)
2194                 port->icount.rng++;
2195         if (status & UART_MSR_DDSR)
2196                 port->icount.dsr++;
2197         if (status & UART_MSR_DDCD)
2198                 port->icount.dcd++;
2199         if (status & UART_MSR_DCTS)
2200                 port->icount.cts++;
2201         port->mon_data.modem_status = status;
2202         wake_up_interruptible(&port->delta_msr_wait);
2203
2204         if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2205                 if (status & UART_MSR_DCD)
2206                         wake_up_interruptible(&port->open_wait);
2207                 schedule_work(&port->tqueue);
2208         }
2209
2210         if (port->flags & ASYNC_CTS_FLOW) {
2211                 if (port->tty->hw_stopped) {
2212                         if (status & UART_MSR_CTS) {
2213                                 port->tty->hw_stopped = 0;
2214
2215                                 if ((port->type != PORT_16550A) &&
2216                                                 (!port->board->chip_flag)) {
2217                                         outb(port->IER & ~UART_IER_THRI,
2218                                                 port->ioaddr + UART_IER);
2219                                         port->IER |= UART_IER_THRI;
2220                                         outb(port->IER, port->ioaddr +
2221                                                         UART_IER);
2222                                 }
2223                                 set_bit(MXSER_EVENT_TXLOW, &port->event);
2224                                 schedule_work(&port->tqueue);
2225                         }
2226                 } else {
2227                         if (!(status & UART_MSR_CTS)) {
2228                                 port->tty->hw_stopped = 1;
2229                                 if (port->type != PORT_16550A &&
2230                                                 !port->board->chip_flag) {
2231                                         port->IER &= ~UART_IER_THRI;
2232                                         outb(port->IER, port->ioaddr +
2233                                                         UART_IER);
2234                                 }
2235                         }
2236                 }
2237         }
2238 }
2239
2240 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_port *port)
2241 {
2242         DECLARE_WAITQUEUE(wait, current);
2243         int retval;
2244         int do_clocal = 0;
2245         unsigned long flags;
2246
2247         /*
2248          * If non-blocking mode is set, or the port is not enabled,
2249          * then make the check up front and then exit.
2250          */
2251         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2252                 port->flags |= ASYNC_NORMAL_ACTIVE;
2253                 return 0;
2254         }
2255
2256         if (tty->termios->c_cflag & CLOCAL)
2257                 do_clocal = 1;
2258
2259         /*
2260          * Block waiting for the carrier detect and the line to become
2261          * free (i.e., not in use by the callout).  While we are in
2262          * this loop, port->count is dropped by one, so that
2263          * mxser_close() knows when to free things.  We restore it upon
2264          * exit, either normal or abnormal.
2265          */
2266         retval = 0;
2267         add_wait_queue(&port->open_wait, &wait);
2268
2269         spin_lock_irqsave(&port->slock, flags);
2270         if (!tty_hung_up_p(filp))
2271                 port->count--;
2272         spin_unlock_irqrestore(&port->slock, flags);
2273         port->blocked_open++;
2274         while (1) {
2275                 spin_lock_irqsave(&port->slock, flags);
2276                 outb(inb(port->ioaddr + UART_MCR) |
2277                         UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
2278                 spin_unlock_irqrestore(&port->slock, flags);
2279                 set_current_state(TASK_INTERRUPTIBLE);
2280                 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
2281                         if (port->flags & ASYNC_HUP_NOTIFY)
2282                                 retval = -EAGAIN;
2283                         else
2284                                 retval = -ERESTARTSYS;
2285                         break;
2286                 }
2287                 if (!(port->flags & ASYNC_CLOSING) &&
2288                                 (do_clocal ||
2289                                 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
2290                         break;
2291                 if (signal_pending(current)) {
2292                         retval = -ERESTARTSYS;
2293                         break;
2294                 }
2295                 schedule();
2296         }
2297         set_current_state(TASK_RUNNING);
2298         remove_wait_queue(&port->open_wait, &wait);
2299         if (!tty_hung_up_p(filp))
2300                 port->count++;
2301         port->blocked_open--;
2302         if (retval)
2303                 return retval;
2304         port->flags |= ASYNC_NORMAL_ACTIVE;
2305         return 0;
2306 }
2307
2308 static int mxser_startup(struct mxser_port *info)
2309 {
2310         unsigned long page;
2311         unsigned long flags;
2312
2313         page = __get_free_page(GFP_KERNEL);
2314         if (!page)
2315                 return -ENOMEM;
2316
2317         spin_lock_irqsave(&info->slock, flags);
2318
2319         if (info->flags & ASYNC_INITIALIZED) {
2320                 free_page(page);
2321                 spin_unlock_irqrestore(&info->slock, flags);
2322                 return 0;
2323         }
2324
2325         if (!info->ioaddr || !info->type) {
2326                 if (info->tty)
2327                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2328                 free_page(page);
2329                 spin_unlock_irqrestore(&info->slock, flags);
2330                 return 0;
2331         }
2332         if (info->xmit_buf)
2333                 free_page(page);
2334         else
2335                 info->xmit_buf = (unsigned char *) page;
2336
2337         /*
2338          * Clear the FIFO buffers and disable them
2339          * (they will be reenabled in mxser_change_speed())
2340          */
2341         if (info->board->chip_flag)
2342                 outb((UART_FCR_CLEAR_RCVR |
2343                         UART_FCR_CLEAR_XMIT |
2344                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
2345         else
2346                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2347                         info->ioaddr + UART_FCR);
2348
2349         /*
2350          * At this point there's no way the LSR could still be 0xFF;
2351          * if it is, then bail out, because there's likely no UART
2352          * here.
2353          */
2354         if (inb(info->ioaddr + UART_LSR) == 0xff) {
2355                 spin_unlock_irqrestore(&info->slock, flags);
2356                 if (capable(CAP_SYS_ADMIN)) {
2357                         if (info->tty)
2358                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2359                         return 0;
2360                 } else
2361                         return -ENODEV;
2362         }
2363
2364         /*
2365          * Clear the interrupt registers.
2366          */
2367         (void) inb(info->ioaddr + UART_LSR);
2368         (void) inb(info->ioaddr + UART_RX);
2369         (void) inb(info->ioaddr + UART_IIR);
2370         (void) inb(info->ioaddr + UART_MSR);
2371
2372         /*
2373          * Now, initialize the UART
2374          */
2375         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
2376         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2377         outb(info->MCR, info->ioaddr + UART_MCR);
2378
2379         /*
2380          * Finally, enable interrupts
2381          */
2382         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2383         /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2384
2385         /* following add by Victor Yu. 08-30-2002 */
2386         if (info->board->chip_flag)
2387                 info->IER |= MOXA_MUST_IER_EGDAI;
2388         /* above add by Victor Yu. 08-30-2002 */
2389         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
2390
2391         /*
2392          * And clear the interrupt registers again for luck.
2393          */
2394         (void) inb(info->ioaddr + UART_LSR);
2395         (void) inb(info->ioaddr + UART_RX);
2396         (void) inb(info->ioaddr + UART_IIR);
2397         (void) inb(info->ioaddr + UART_MSR);
2398
2399         if (info->tty)
2400                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2401         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2402
2403         /*
2404          * and set the speed of the serial port
2405          */
2406         spin_unlock_irqrestore(&info->slock, flags);
2407         mxser_change_speed(info, NULL);
2408
2409         info->flags |= ASYNC_INITIALIZED;
2410         return 0;
2411 }
2412
2413 /*
2414  * This routine will shutdown a serial port; interrupts maybe disabled, and
2415  * DTR is dropped if the hangup on close termio flag is on.
2416  */
2417 static void mxser_shutdown(struct mxser_port *info)
2418 {
2419         unsigned long flags;
2420
2421         if (!(info->flags & ASYNC_INITIALIZED))
2422                 return;
2423
2424         spin_lock_irqsave(&info->slock, flags);
2425
2426         /*
2427          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2428          * here so the queue might never be waken up
2429          */
2430         wake_up_interruptible(&info->delta_msr_wait);
2431
2432         /*
2433          * Free the IRQ, if necessary
2434          */
2435         if (info->xmit_buf) {
2436                 free_page((unsigned long) info->xmit_buf);
2437                 info->xmit_buf = NULL;
2438         }
2439
2440         info->IER = 0;
2441         outb(0x00, info->ioaddr + UART_IER);
2442
2443         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2444                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2445         outb(info->MCR, info->ioaddr + UART_MCR);
2446
2447         /* clear Rx/Tx FIFO's */
2448         /* following add by Victor Yu. 08-30-2002 */
2449         if (info->board->chip_flag)
2450                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
2451                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
2452                                 info->ioaddr + UART_FCR);
2453         else
2454                 /* above add by Victor Yu. 08-30-2002 */
2455                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
2456                         info->ioaddr + UART_FCR);
2457
2458         /* read data port to reset things */
2459         (void) inb(info->ioaddr + UART_RX);
2460
2461         if (info->tty)
2462                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2463
2464         info->flags &= ~ASYNC_INITIALIZED;
2465
2466         /* following add by Victor Yu. 09-23-2002 */
2467         if (info->board->chip_flag)
2468                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2469         /* above add by Victor Yu. 09-23-2002 */
2470
2471         spin_unlock_irqrestore(&info->slock, flags);
2472 }
2473
2474 /*
2475  * This routine is called to set the UART divisor registers to match
2476  * the specified baud rate for a serial port.
2477  */
2478 static int mxser_change_speed(struct mxser_port *info,
2479                 struct termios *old_termios)
2480 {
2481         unsigned cflag, cval, fcr;
2482         int ret = 0;
2483         unsigned char status;
2484         long baud;
2485         unsigned long flags;
2486
2487         if (!info->tty || !info->tty->termios)
2488                 return ret;
2489         cflag = info->tty->termios->c_cflag;
2490         if (!(info->ioaddr))
2491                 return ret;
2492
2493 #ifndef B921600
2494 #define B921600 (B460800 +1)
2495 #endif
2496         if (mxser_set_baud_method[info->tty->index] == 0) {
2497                 baud = tty_get_baud_rate(info->tty);
2498                 mxser_set_baud(info, baud);
2499         }
2500
2501         /* byte size and parity */
2502         switch (cflag & CSIZE) {
2503         case CS5:
2504                 cval = 0x00;
2505                 break;
2506         case CS6:
2507                 cval = 0x01;
2508                 break;
2509         case CS7:
2510                 cval = 0x02;
2511                 break;
2512         case CS8:
2513                 cval = 0x03;
2514                 break;
2515         default:
2516                 cval = 0x00;
2517                 break;          /* too keep GCC shut... */
2518         }
2519         if (cflag & CSTOPB)
2520                 cval |= 0x04;
2521         if (cflag & PARENB)
2522                 cval |= UART_LCR_PARITY;
2523         if (!(cflag & PARODD))
2524                 cval |= UART_LCR_EPAR;
2525         if (cflag & CMSPAR)
2526                 cval |= UART_LCR_SPAR;
2527
2528         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2529                 if (info->board->chip_flag) {
2530                         fcr = UART_FCR_ENABLE_FIFO;
2531                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2532                         SET_MOXA_MUST_FIFO_VALUE(info);
2533                 } else
2534                         fcr = 0;
2535         } else {
2536                 fcr = UART_FCR_ENABLE_FIFO;
2537                 /* following add by Victor Yu. 08-30-2002 */
2538                 if (info->board->chip_flag) {
2539                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2540                         SET_MOXA_MUST_FIFO_VALUE(info);
2541                 } else {
2542                         /* above add by Victor Yu. 08-30-2002 */
2543                         switch (info->rx_trigger) {
2544                         case 1:
2545                                 fcr |= UART_FCR_TRIGGER_1;
2546                                 break;
2547                         case 4:
2548                                 fcr |= UART_FCR_TRIGGER_4;
2549                                 break;
2550                         case 8:
2551                                 fcr |= UART_FCR_TRIGGER_8;
2552                                 break;
2553                         default:
2554                                 fcr |= UART_FCR_TRIGGER_14;
2555                                 break;
2556                         }
2557                 }
2558         }
2559
2560         /* CTS flow control flag and modem status interrupts */
2561         info->IER &= ~UART_IER_MSI;
2562         info->MCR &= ~UART_MCR_AFE;
2563         if (cflag & CRTSCTS) {
2564                 info->flags |= ASYNC_CTS_FLOW;
2565                 info->IER |= UART_IER_MSI;
2566                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
2567                         info->MCR |= UART_MCR_AFE;
2568 /*                      status = mxser_get_msr(info->ioaddr, 0, info->port); */
2569 /*
2570         save_flags(flags);
2571         cli();
2572         status = inb(baseaddr + UART_MSR);
2573         restore_flags(flags);
2574 */
2575                         /* mxser_check_modem_status(info, status); */
2576                 } else {
2577 /*                      status = mxser_get_msr(info->ioaddr, 0, info->port); */
2578                         /* MX_LOCK(&info->slock); */
2579                         status = inb(info->ioaddr + UART_MSR);
2580                         /* MX_UNLOCK(&info->slock); */
2581                         if (info->tty->hw_stopped) {
2582                                 if (status & UART_MSR_CTS) {
2583                                         info->tty->hw_stopped = 0;
2584                                         if (info->type != PORT_16550A &&
2585                                                         !info->board->chip_flag) {
2586                                                 outb(info->IER & ~UART_IER_THRI,
2587                                                         info->ioaddr +
2588                                                         UART_IER);
2589                                                 info->IER |= UART_IER_THRI;
2590                                                 outb(info->IER, info->ioaddr +
2591                                                                 UART_IER);
2592                                         }
2593                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2594                                         schedule_work(&info->tqueue);                           }
2595                         } else {
2596                                 if (!(status & UART_MSR_CTS)) {
2597                                         info->tty->hw_stopped = 1;
2598                                         if ((info->type != PORT_16550A) &&
2599                                                         (!info->board->chip_flag)) {
2600                                                 info->IER &= ~UART_IER_THRI;
2601                                                 outb(info->IER, info->ioaddr +
2602                                                                 UART_IER);
2603                                         }
2604                                 }
2605                         }
2606                 }
2607         } else {
2608                 info->flags &= ~ASYNC_CTS_FLOW;
2609         }
2610         outb(info->MCR, info->ioaddr + UART_MCR);
2611         if (cflag & CLOCAL) {
2612                 info->flags &= ~ASYNC_CHECK_CD;
2613         } else {
2614                 info->flags |= ASYNC_CHECK_CD;
2615                 info->IER |= UART_IER_MSI;
2616         }
2617         outb(info->IER, info->ioaddr + UART_IER);
2618
2619         /*
2620          * Set up parity check flag
2621          */
2622         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2623         if (I_INPCK(info->tty))
2624                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2625         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2626                 info->read_status_mask |= UART_LSR_BI;
2627
2628         info->ignore_status_mask = 0;
2629
2630         if (I_IGNBRK(info->tty)) {
2631                 info->ignore_status_mask |= UART_LSR_BI;
2632                 info->read_status_mask |= UART_LSR_BI;
2633                 /*
2634                  * If we're ignore parity and break indicators, ignore
2635                  * overruns too.  (For real raw support).
2636                  */
2637                 if (I_IGNPAR(info->tty)) {
2638                         info->ignore_status_mask |=
2639                                                 UART_LSR_OE |
2640                                                 UART_LSR_PE |
2641                                                 UART_LSR_FE;
2642                         info->read_status_mask |=
2643                                                 UART_LSR_OE |
2644                                                 UART_LSR_PE |
2645                                                 UART_LSR_FE;
2646                 }
2647         }
2648         /* following add by Victor Yu. 09-02-2002 */
2649         if (info->board->chip_flag) {
2650                 spin_lock_irqsave(&info->slock, flags);
2651                 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
2652                 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
2653                 if (I_IXON(info->tty)) {
2654                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2655                 } else {
2656                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2657                 }
2658                 if (I_IXOFF(info->tty)) {
2659                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2660                 } else {
2661                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2662                 }
2663                 /*
2664                    if ( I_IXANY(info->tty) ) {
2665                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2666                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2667                    } else {
2668                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2669                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2670                    }
2671                  */
2672                 spin_unlock_irqrestore(&info->slock, flags);
2673         }
2674         /* above add by Victor Yu. 09-02-2002 */
2675
2676
2677         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
2678         outb(cval, info->ioaddr + UART_LCR);
2679
2680         return ret;
2681 }
2682
2683
2684 static int mxser_set_baud(struct mxser_port *info, long newspd)
2685 {
2686         int quot = 0;
2687         unsigned char cval;
2688         int ret = 0;
2689         unsigned long flags;
2690
2691         if (!info->tty || !info->tty->termios)
2692                 return ret;
2693
2694         if (!(info->ioaddr))
2695                 return ret;
2696
2697         if (newspd > info->max_baud)
2698                 return 0;
2699
2700         info->realbaud = newspd;
2701         if (newspd == 134) {
2702                 quot = (2 * info->baud_base / 269);
2703         } else if (newspd) {
2704                 quot = info->baud_base / newspd;
2705                 if (quot == 0)
2706                         quot = 1;
2707         } else {
2708                 quot = 0;
2709         }
2710
2711         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2712         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2713
2714         if (quot) {
2715                 spin_lock_irqsave(&info->slock, flags);
2716                 info->MCR |= UART_MCR_DTR;
2717                 outb(info->MCR, info->ioaddr + UART_MCR);
2718                 spin_unlock_irqrestore(&info->slock, flags);
2719         } else {
2720                 spin_lock_irqsave(&info->slock, flags);
2721                 info->MCR &= ~UART_MCR_DTR;
2722                 outb(info->MCR, info->ioaddr + UART_MCR);
2723                 spin_unlock_irqrestore(&info->slock, flags);
2724                 return ret;
2725         }
2726
2727         cval = inb(info->ioaddr + UART_LCR);
2728
2729         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
2730
2731         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
2732         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
2733         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
2734
2735
2736         return ret;
2737 }
2738
2739 /*
2740  * ------------------------------------------------------------
2741  * friends of mxser_ioctl()
2742  * ------------------------------------------------------------
2743  */
2744 static int mxser_get_serial_info(struct mxser_port *info,
2745                 struct serial_struct __user *retinfo)
2746 {
2747         struct serial_struct tmp;
2748
2749         if (!retinfo)
2750                 return -EFAULT;
2751         memset(&tmp, 0, sizeof(tmp));
2752         tmp.type = info->type;
2753         tmp.line = info->tty->index;
2754         tmp.port = info->ioaddr;
2755         tmp.irq = info->board->irq;
2756         tmp.flags = info->flags;
2757         tmp.baud_base = info->baud_base;
2758         tmp.close_delay = info->close_delay;
2759         tmp.closing_wait = info->closing_wait;
2760         tmp.custom_divisor = info->custom_divisor;
2761         tmp.hub6 = 0;
2762         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2763                 return -EFAULT;
2764         return 0;
2765 }
2766
2767 static int mxser_set_serial_info(struct mxser_port *info,
2768                 struct serial_struct __user *new_info)
2769 {
2770         struct serial_struct new_serial;
2771         unsigned int flags;
2772         int retval = 0;
2773
2774         if (!new_info || !info->ioaddr)
2775                 return -EFAULT;
2776         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2777                 return -EFAULT;
2778
2779         if ((new_serial.irq != info->board->irq) ||
2780                         (new_serial.port != info->ioaddr) ||
2781                         (new_serial.custom_divisor != info->custom_divisor) ||
2782                         (new_serial.baud_base != info->baud_base))
2783                 return -EPERM;
2784
2785         flags = info->flags & ASYNC_SPD_MASK;
2786
2787         if (!capable(CAP_SYS_ADMIN)) {
2788                 if ((new_serial.baud_base != info->baud_base) ||
2789                                 (new_serial.close_delay != info->close_delay) ||
2790                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2791                         return -EPERM;
2792                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2793                                 (new_serial.flags & ASYNC_USR_MASK));
2794         } else {
2795                 /*
2796                  * OK, past this point, all the error checking has been done.
2797                  * At this point, we start making changes.....
2798                  */
2799                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2800                                 (new_serial.flags & ASYNC_FLAGS));
2801                 info->close_delay = new_serial.close_delay * HZ / 100;
2802                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2803                 info->tty->low_latency =
2804                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2805                 info->tty->low_latency = 0;     /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2806         }
2807
2808         /* added by casper, 3/17/2000, for mouse */
2809         info->type = new_serial.type;
2810
2811         process_txrx_fifo(info);
2812
2813         if (info->flags & ASYNC_INITIALIZED) {
2814                 if (flags != (info->flags & ASYNC_SPD_MASK))
2815                         mxser_change_speed(info, NULL);
2816         } else
2817                 retval = mxser_startup(info);
2818
2819         return retval;
2820 }
2821
2822 /*
2823  * mxser_get_lsr_info - get line status register info
2824  *
2825  * Purpose: Let user call ioctl() to get info when the UART physically
2826  *          is emptied.  On bus types like RS485, the transmitter must
2827  *          release the bus after transmitting. This must be done when
2828  *          the transmit shift register is empty, not be done when the
2829  *          transmit holding register is empty.  This functionality
2830  *          allows an RS485 driver to be written in user space.
2831  */
2832 static int mxser_get_lsr_info(struct mxser_port *info,
2833                 unsigned int __user *value)
2834 {
2835         unsigned char status;
2836         unsigned int result;
2837         unsigned long flags;
2838
2839         spin_lock_irqsave(&info->slock, flags);
2840         status = inb(info->ioaddr + UART_LSR);
2841         spin_unlock_irqrestore(&info->slock, flags);
2842         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2843         return put_user(result, value);
2844 }
2845
2846 /*
2847  * This routine sends a break character out the serial port.
2848  */
2849 static void mxser_send_break(struct mxser_port *info, int duration)
2850 {
2851         unsigned long flags;
2852
2853         if (!info->ioaddr)
2854                 return;
2855         set_current_state(TASK_INTERRUPTIBLE);
2856         spin_lock_irqsave(&info->slock, flags);
2857         outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2858                 info->ioaddr + UART_LCR);
2859         spin_unlock_irqrestore(&info->slock, flags);
2860         schedule_timeout(duration);
2861         spin_lock_irqsave(&info->slock, flags);
2862         outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2863                 info->ioaddr + UART_LCR);
2864         spin_unlock_irqrestore(&info->slock, flags);
2865 }
2866
2867 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2868 {
2869         struct mxser_port *info = tty->driver_data;
2870         unsigned char control, status;
2871         unsigned long flags;
2872
2873
2874         if (tty->index == MXSER_PORTS)
2875                 return -ENOIOCTLCMD;
2876         if (tty->flags & (1 << TTY_IO_ERROR))
2877                 return -EIO;
2878
2879         control = info->MCR;
2880
2881         spin_lock_irqsave(&info->slock, flags);
2882         status = inb(info->ioaddr + UART_MSR);
2883         if (status & UART_MSR_ANY_DELTA)
2884                 mxser_check_modem_status(info, status);
2885         spin_unlock_irqrestore(&info->slock, flags);
2886         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2887                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2888                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2889                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2890                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2891                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2892 }
2893
2894 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
2895                 unsigned int set, unsigned int clear)
2896 {
2897         struct mxser_port *info = tty->driver_data;
2898         unsigned long flags;
2899
2900
2901         if (tty->index == MXSER_PORTS)
2902                 return -ENOIOCTLCMD;
2903         if (tty->flags & (1 << TTY_IO_ERROR))
2904                 return -EIO;
2905
2906         spin_lock_irqsave(&info->slock, flags);
2907
2908         if (set & TIOCM_RTS)
2909                 info->MCR |= UART_MCR_RTS;
2910         if (set & TIOCM_DTR)
2911                 info->MCR |= UART_MCR_DTR;
2912
2913         if (clear & TIOCM_RTS)
2914                 info->MCR &= ~UART_MCR_RTS;
2915         if (clear & TIOCM_DTR)
2916                 info->MCR &= ~UART_MCR_DTR;
2917
2918         outb(info->MCR, info->ioaddr + UART_MCR);
2919         spin_unlock_irqrestore(&info->slock, flags);
2920         return 0;
2921 }
2922
2923
2924 static int mxser_read_register(int, unsigned short *);
2925 static int mxser_program_mode(int);
2926 static void mxser_normal_mode(int);
2927
2928 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2929 {
2930         int id, i, bits;
2931         unsigned short regs[16], irq;
2932         unsigned char scratch, scratch2;
2933
2934         brd->chip_flag = MOXA_OTHER_UART;
2935
2936         id = mxser_read_register(cap, regs);
2937         if (id == C168_ASIC_ID) {
2938                 brd->board_type = MXSER_BOARD_C168_ISA;
2939                 brd->nports = 8;
2940         } else if (id == C104_ASIC_ID) {
2941                 brd->board_type = MXSER_BOARD_C104_ISA;
2942                 brd->nports = 4;
2943         } else if (id == C102_ASIC_ID) {
2944                 brd->board_type = MXSER_BOARD_C102_ISA;
2945                 brd->nports = 2;
2946         } else if (id == CI132_ASIC_ID) {
2947                 brd->board_type = MXSER_BOARD_CI132;
2948                 brd->nports = 2;
2949         } else if (id == CI134_ASIC_ID) {
2950                 brd->board_type = MXSER_BOARD_CI134;
2951                 brd->nports = 4;
2952         } else if (id == CI104J_ASIC_ID) {
2953                 brd->board_type = MXSER_BOARD_CI104J;
2954                 brd->nports = 4;
2955         } else
2956                 return 0;
2957
2958         irq = 0;
2959         if (brd->nports == 2) {
2960                 irq = regs[9] & 0xF000;
2961                 irq = irq | (irq >> 4);
2962                 if (irq != (regs[9] & 0xFF00))
2963                         return MXSER_ERR_IRQ_CONFLIT;
2964         } else if (brd->nports == 4) {
2965                 irq = regs[9] & 0xF000;
2966                 irq = irq | (irq >> 4);
2967                 irq = irq | (irq >> 8);
2968                 if (irq != regs[9])
2969                         return MXSER_ERR_IRQ_CONFLIT;
2970         } else if (brd->nports == 8) {
2971                 irq = regs[9] & 0xF000;
2972                 irq = irq | (irq >> 4);
2973                 irq = irq | (irq >> 8);
2974                 if ((irq != regs[9]) || (irq != regs[10]))
2975                         return MXSER_ERR_IRQ_CONFLIT;
2976         }
2977
2978         if (!irq)
2979                 return MXSER_ERR_IRQ;
2980         brd->irq = ((int)(irq & 0xF000) >> 12);
2981         for (i = 0; i < 8; i++)
2982                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2983         if ((regs[12] & 0x80) == 0)
2984                 return MXSER_ERR_VECTOR;
2985         brd->vector = (int)regs[11];    /* interrupt vector */
2986         if (id == 1)
2987                 brd->vector_mask = 0x00FF;
2988         else
2989                 brd->vector_mask = 0x000F;
2990         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2991                 if (regs[12] & bits) {
2992                         brd->ports[i].baud_base = 921600;
2993                         brd->ports[i].max_baud = 921600;        /* add by Victor Yu. 09-04-2002 */
2994                 } else {
2995                         brd->ports[i].baud_base = 115200;
2996                         brd->ports[i].max_baud = 115200;        /* add by Victor Yu. 09-04-2002 */
2997                 }
2998         }
2999         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3000         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3001         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3002         outb(scratch2, cap + UART_LCR);
3003         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3004         scratch = inb(cap + UART_IIR);
3005
3006         if (scratch & 0xC0)
3007                 brd->uart_type = PORT_16550A;
3008         else
3009                 brd->uart_type = PORT_16450;
3010         if (id == 1)
3011                 brd->nports = 8;
3012         else
3013                 brd->nports = 4;
3014         request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)");
3015         request_region(brd->vector, 1, "mxser(vector)");
3016         return brd->nports;
3017 }
3018
3019 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3020 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3021 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3022 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3023 #define EN_CCMD         0x000   /* Chip's command register     */
3024 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3025 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3026 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3027 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3028 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3029 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3030 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3031 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3032 static int mxser_read_register(int port, unsigned short *regs)
3033 {
3034         int i, k, value, id;
3035         unsigned int j;
3036
3037         id = mxser_program_mode(port);
3038         if (id < 0)
3039                 return id;
3040         for (i = 0; i < 14; i++) {
3041                 k = (i & 0x3F) | 0x180;
3042                 for (j = 0x100; j > 0; j >>= 1) {
3043                         outb(CHIP_CS, port);
3044                         if (k & j) {
3045                                 outb(CHIP_CS | CHIP_DO, port);
3046                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3047                         } else {
3048                                 outb(CHIP_CS, port);
3049                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3050                         }
3051                 }
3052                 (void)inb(port);
3053                 value = 0;
3054                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3055                         outb(CHIP_CS, port);
3056                         outb(CHIP_CS | CHIP_SK, port);
3057                         if (inb(port) & CHIP_DI)
3058                                 value |= j;
3059                 }
3060                 regs[i] = value;
3061                 outb(0, port);
3062         }
3063         mxser_normal_mode(port);
3064         return id;
3065 }
3066
3067 static int mxser_program_mode(int port)
3068 {
3069         int id, i, j, n;
3070         /* unsigned long flags; */
3071
3072         spin_lock(&gm_lock);
3073         outb(0, port);
3074         outb(0, port);
3075         outb(0, port);
3076         (void)inb(port);
3077         (void)inb(port);
3078         outb(0, port);
3079         (void)inb(port);
3080         /* restore_flags(flags); */
3081         spin_unlock(&gm_lock);
3082
3083         id = inb(port + 1) & 0x1F;
3084         if ((id != C168_ASIC_ID) &&
3085                         (id != C104_ASIC_ID) &&
3086                         (id != C102_ASIC_ID) &&
3087                         (id != CI132_ASIC_ID) &&
3088                         (id != CI134_ASIC_ID) &&
3089                         (id != CI104J_ASIC_ID))
3090                 return -1;
3091         for (i = 0, j = 0; i < 4; i++) {
3092                 n = inb(port + 2);
3093                 if (n == 'M') {
3094                         j = 1;
3095                 } else if ((j == 1) && (n == 1)) {
3096                         j = 2;
3097                         break;
3098                 } else
3099                         j = 0;
3100         }
3101         if (j != 2)
3102                 id = -2;
3103         return id;
3104 }
3105
3106 static void mxser_normal_mode(int port)
3107 {
3108         int i, n;
3109
3110         outb(0xA5, port + 1);
3111         outb(0x80, port + 3);
3112         outb(12, port + 0);     /* 9600 bps */
3113         outb(0, port + 1);
3114         outb(0x03, port + 3);   /* 8 data bits */
3115         outb(0x13, port + 4);   /* loop back mode */
3116         for (i = 0; i < 16; i++) {
3117                 n = inb(port + 5);
3118                 if ((n & 0x61) == 0x60)
3119                         break;
3120                 if ((n & 1) == 1)
3121                         (void)inb(port);
3122         }
3123         outb(0x00, port + 4);
3124 }
3125
3126 module_init(mxser_module_init);
3127 module_exit(mxser_module_exit);