drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2001  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  *      Original release        10/26/00
  24  *
  25  *      02/06/01        Support MOXA Industio family boards.
  26  *      02/06/01        Support TIOCGICOUNT.
  27  *      02/06/01        Fix the problem for connecting to serial mouse.
  28  *      02/06/01        Fix the problem for H/W flow control.
  29  *      02/06/01        Fix the compling warning when CONFIG_PCI
  30  *                      don't be defined.
  31  *
  32  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  33  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  34  *      - Fixed x86_64 cleanness
  35  *      - Fixed sleep with spinlock held in mxser_send_break
  36  */
  37
  38
  39 #include <linux/config.h>
  40 #include <linux/module.h>
  41 #include <linux/autoconf.h>
  42 #include <linux/errno.h>
  43 #include <linux/signal.h>
  44 #include <linux/sched.h>
  45 #include <linux/timer.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/tty.h>
  48 #include <linux/tty_flip.h>
  49 #include <linux/serial.h>
  50 #include <linux/serial_reg.h>
  51 #include <linux/major.h>
  52 #include <linux/string.h>
  53 #include <linux/fcntl.h>
  54 #include <linux/ptrace.h>
  55 #include <linux/gfp.h>
  56 #include <linux/ioport.h>
  57 #include <linux/mm.h>
  58 #include <linux/smp_lock.h>
  59 #include <linux/delay.h>
  60 #include <linux/pci.h>
  61
  62 #include <asm/system.h>
  63 #include <asm/io.h>
  64 #include <asm/irq.h>
  65 #include <asm/bitops.h>
  66 #include <asm/uaccess.h>
  67
  68 #include "mxser.h"
  69
  70 #define MXSER_VERSION   "1.8"
  71 #define MXSERMAJOR       174
  72 #define MXSERCUMAJOR     175
  73
  74 #define MXSER_EVENT_TXLOW        1
  75 #define MXSER_EVENT_HANGUP       2
  76
  77 #define MXSER_BOARDS            4       /* Max. boards */
  78 #define MXSER_PORTS             32      /* Max. ports */
  79 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  80 #define MXSER_ISR_PASS_LIMIT    256
  81
  82 #define MXSER_ERR_IOADDR        -1
  83 #define MXSER_ERR_IRQ           -2
  84 #define MXSER_ERR_IRQ_CONFLIT   -3
  85 #define MXSER_ERR_VECTOR        -4
  86
  87 #define SERIAL_TYPE_NORMAL      1
  88 #define SERIAL_TYPE_CALLOUT     2
  89
  90 #define WAKEUP_CHARS            256
  91
  92 #define UART_MCR_AFE            0x20
  93 #define UART_LSR_SPECIAL        0x1E
  94
  95 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
  96
  97 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
  98
  99 #define C168_ASIC_ID    1
 100 #define C104_ASIC_ID    2
 101 #define C102_ASIC_ID    0xB
 102 #define CI132_ASIC_ID   4
 103 #define CI134_ASIC_ID   3
 104 #define CI104J_ASIC_ID  5
 105
 106 enum {
 107         MXSER_BOARD_C168_ISA = 1,
 108         MXSER_BOARD_C104_ISA,
 109         MXSER_BOARD_CI104J,
 110         MXSER_BOARD_C168_PCI,
 111         MXSER_BOARD_C104_PCI,
 112         MXSER_BOARD_C102_ISA,
 113         MXSER_BOARD_CI132,
 114         MXSER_BOARD_CI134,
 115         MXSER_BOARD_CP132,
 116         MXSER_BOARD_CP114,
 117         MXSER_BOARD_CT114,
 118         MXSER_BOARD_CP102,
 119         MXSER_BOARD_CP104U,
 120         MXSER_BOARD_CP168U,
 121         MXSER_BOARD_CP132U,
 122         MXSER_BOARD_CP134U,
 123         MXSER_BOARD_CP104JU,
 124         MXSER_BOARD_RC7000,
 125         MXSER_BOARD_CP118U,
 126         MXSER_BOARD_CP102UL,
 127         MXSER_BOARD_CP102U,
 128 };
 129
 130 static char *mxser_brdname[] = {
 131         "C168 series",
 132         "C104 series",
 133         "CI-104J series",
 134         "C168H/PCI series",
 135         "C104H/PCI series",
 136         "C102 series",
 137         "CI-132 series",
 138         "CI-134 series",
 139         "CP-132 series",
 140         "CP-114 series",
 141         "CT-114 series",
 142         "CP-102 series",
 143         "CP-104U series",
 144         "CP-168U series",
 145         "CP-132U series",
 146         "CP-134U series",
 147         "CP-104JU series",
 148         "Moxa UC7000 Serial",
 149         "CP-118U series",
 150         "CP-102UL series",
 151         "CP-102U series",
 152 };
 153
 154 static int mxser_numports[] = {
 155         8,                      // C168-ISA
 156         4,                      // C104-ISA
 157         4,                      // CI104J
 158         8,                      // C168-PCI
 159         4,                      // C104-PCI
 160         2,                      // C102-ISA
 161         2,                      // CI132
 162         4,                      // CI134
 163         2,                      // CP132
 164         4,                      // CP114
 165         4,                      // CT114
 166         2,                      // CP102
 167         4,                      // CP104U
 168         8,                      // CP168U
 169         2,                      // CP132U
 170         4,                      // CP134U
 171         4,                      // CP104JU
 172         8,                      // RC7000
 173         8,                      // CP118U
 174         2,                      // CP102UL
 175         2,                      // CP102U
 176 };
 177
 178 #define UART_TYPE_NUM   2
 179
 180 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 181         MOXA_MUST_MU150_HWID,
 182         MOXA_MUST_MU860_HWID
 183 };
 184
 185 // This is only for PCI
 186 #define UART_INFO_NUM   3
 187 struct mxpciuart_info {
 188         int type;
 189         int tx_fifo;
 190         int rx_fifo;
 191         int xmit_fifo_size;
 192         int rx_high_water;
 193         int rx_trigger;
 194         int rx_low_water;
 195         long max_baud;
 196 };
 197
 198 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 199         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 200         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 201         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 202 };
 203
 204
 205 #ifdef CONFIG_PCI
 206
 207 static struct pci_device_id mxser_pcibrds[] = {
 208         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 222         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 223         {0}
 224 };
 225
 226 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 227
 228
 229 #endif
 230
 231 typedef struct _moxa_pci_info {
 232         unsigned short busNum;
 233         unsigned short devNum;
 234         struct pci_dev *pdev;   // add by Victor Yu. 06-23-2003
 235 } moxa_pci_info;
 236
 237 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 238 static int ttymajor = MXSERMAJOR;
 239 static int calloutmajor = MXSERCUMAJOR;
 240 static int verbose = 0;
 241
 242 /* Variables for insmod */
 243
 244 MODULE_AUTHOR("Casper Yang");
 245 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 246 MODULE_PARM(ioaddr, "1-4i");
 247 MODULE_PARM(ttymajor, "i");
 248 MODULE_PARM(calloutmajor, "i");
 249 MODULE_PARM(verbose, "i");
 250 MODULE_LICENSE("GPL");
 251
 252 struct mxser_log {
 253         int tick;
 254         unsigned long rxcnt[MXSER_PORTS];
 255         unsigned long txcnt[MXSER_PORTS];
 256 };
 257
 258
 259 struct mxser_mon {
 260         unsigned long rxcnt;
 261         unsigned long txcnt;
 262         unsigned long up_rxcnt;
 263         unsigned long up_txcnt;
 264         int modem_status;
 265         unsigned char hold_reason;
 266 };
 267
 268 struct mxser_mon_ext {
 269         unsigned long rx_cnt[32];
 270         unsigned long tx_cnt[32];
 271         unsigned long up_rxcnt[32];
 272         unsigned long up_txcnt[32];
 273         int modem_status[32];
 274
 275         long baudrate[32];
 276         int databits[32];
 277         int stopbits[32];
 278         int parity[32];
 279         int flowctrl[32];
 280         int fifo[32];
 281         int iftype[32];
 282 };
 283 struct mxser_hwconf {
 284         int board_type;
 285         int ports;
 286         int irq;
 287         int vector;
 288         int vector_mask;
 289         int uart_type;
 290         int ioaddr[MXSER_PORTS_PER_BOARD];
 291         int baud_base[MXSER_PORTS_PER_BOARD];
 292         moxa_pci_info pciInfo;
 293         int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
 294         int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];   // add by Victor Yu. 09-04-2002
 295         int opmode_ioaddr[MXSER_PORTS_PER_BOARD];       // add by Victor Yu. 01-05-2004
 296 };
 297
 298 struct mxser_struct {
 299         int port;
 300         int base;               /* port base address */
 301         int irq;                /* port using irq no. */
 302         int vector;             /* port irq vector */
 303         int vectormask;         /* port vector mask */
 304         int rx_high_water;
 305         int rx_trigger;         /* Rx fifo trigger level */
 306         int rx_low_water;
 307         int baud_base;          /* max. speed */
 308         int flags;              /* defined in tty.h */
 309         int type;               /* UART type */
 310         struct tty_struct *tty;
 311         int read_status_mask;
 312         int ignore_status_mask;
 313         int xmit_fifo_size;
 314         int custom_divisor;
 315         int x_char;             /* xon/xoff character */
 316         int close_delay;
 317         unsigned short closing_wait;
 318         int IER;                /* Interrupt Enable Register */
 319         int MCR;                /* Modem control register */
 320         unsigned long event;
 321         int count;              /* # of fd on device */
 322         int blocked_open;       /* # of blocked opens */
 323         long session;           /* Session of opening process */
 324         long pgrp;              /* pgrp of opening process */
 325         unsigned char *xmit_buf;
 326         int xmit_head;
 327         int xmit_tail;
 328         int xmit_cnt;
 329         struct work_struct tqueue;
 330         struct termios normal_termios;
 331         struct termios callout_termios;
 332         wait_queue_head_t open_wait;
 333         wait_queue_head_t close_wait;
 334         wait_queue_head_t delta_msr_wait;
 335         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 336         int timeout;
 337         int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
 338         int MaxCanSetBaudRate;  // add by Victor Yu. 09-04-2002
 339         int opmode_ioaddr;      // add by Victor Yu. 01-05-2004
 340         unsigned char stop_rx;
 341         unsigned char ldisc_stop_rx;
 342         long realbaud;
 343         struct mxser_mon mon_data;
 344         unsigned char err_shadow;
 345         spinlock_t slock;
 346 };
 347
 348
 349 struct mxser_mstatus {
 350         tcflag_t cflag;
 351         int cts;
 352         int dsr;
 353         int ri;
 354         int dcd;
 355 };
 356
 357 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 358
 359 static int mxserBoardCAP[MXSER_BOARDS] = {
 360         0, 0, 0, 0
 361             /*  0x180, 0x280, 0x200, 0x320   */
 362 };
 363
 364 static struct tty_driver *mxvar_sdriver;
 365 static struct mxser_struct mxvar_table[MXSER_PORTS];
 366 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 367 static struct termios *mxvar_termios[MXSER_PORTS + 1];
 368 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
 369 static struct mxser_log mxvar_log;
 370 static int mxvar_diagflag;
 371 static unsigned char mxser_msr[MXSER_PORTS + 1];
 372 static struct mxser_mon_ext mon_data_ext;
 373 static int mxser_set_baud_method[MXSER_PORTS + 1];
 374 static spinlock_t gm_lock;
 375
 376 /*
 377  * This is used to figure out the divisor speeds and the timeouts
 378  */
 379
 380 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 381
 382 /*
 383  * static functions:
 384  */
 385
 386 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 387 static int mxser_init(void);
 388
 389 //static void   mxser_poll(unsigned long);
 390 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 391 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 392 static void mxser_do_softint(void *);
 393 static int mxser_open(struct tty_struct *, struct file *);
 394 static void mxser_close(struct tty_struct *, struct file *);
 395 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 396 static int mxser_write_room(struct tty_struct *);
 397 static void mxser_flush_buffer(struct tty_struct *);
 398 static int mxser_chars_in_buffer(struct tty_struct *);
 399 static void mxser_flush_chars(struct tty_struct *);
 400 static void mxser_put_char(struct tty_struct *, unsigned char);
 401 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 402 static int mxser_ioctl_special(unsigned int, void __user *);
 403 static void mxser_throttle(struct tty_struct *);
 404 static void mxser_unthrottle(struct tty_struct *);
 405 static void mxser_set_termios(struct tty_struct *, struct termios *);
 406 static void mxser_stop(struct tty_struct *);
 407 static void mxser_start(struct tty_struct *);
 408 static void mxser_hangup(struct tty_struct *);
 409 static void mxser_rs_break(struct tty_struct *, int);
 410 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
 411 static void mxser_receive_chars(struct mxser_struct *, int *);
 412 static void mxser_transmit_chars(struct mxser_struct *);
 413 static void mxser_check_modem_status(struct mxser_struct *, int);
 414 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 415 static int mxser_startup(struct mxser_struct *);
 416 static void mxser_shutdown(struct mxser_struct *);
 417 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
 418 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 419 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 420 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 421 static void mxser_send_break(struct mxser_struct *, int);
 422 static int mxser_tiocmget(struct tty_struct *, struct file *);
 423 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 424 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 425 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 426
 427 static void mxser_startrx(struct tty_struct *tty);
 428 static void mxser_stoprx(struct tty_struct *tty);
 429
 430
 431 static int CheckIsMoxaMust(int io)
 432 {
 433         u8 oldmcr, hwid;
 434         int i;
 435
 436         outb(0, io + UART_LCR);
 437         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 438         oldmcr = inb(io + UART_MCR);
 439         outb(0, io + UART_MCR);
 440         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 441         if ((hwid = inb(io + UART_MCR)) != 0) {
 442                 outb(oldmcr, io + UART_MCR);
 443                 return (MOXA_OTHER_UART);
 444         }
 445
 446         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 447         for (i = 0; i < UART_TYPE_NUM; i++) {
 448                 if (hwid == Gmoxa_uart_id[i])
 449                         return (int) hwid;
 450         }
 451         return MOXA_OTHER_UART;
 452 }
 453
 454 // above is modified by Victor Yu. 08-15-2002
 455
 456 static struct tty_operations mxser_ops = {
 457         .open = mxser_open,
 458         .close = mxser_close,
 459         .write = mxser_write,
 460         .put_char = mxser_put_char,
 461         .flush_chars = mxser_flush_chars,
 462         .write_room = mxser_write_room,
 463         .chars_in_buffer = mxser_chars_in_buffer,
 464         .flush_buffer = mxser_flush_buffer,
 465         .ioctl = mxser_ioctl,
 466         .throttle = mxser_throttle,
 467         .unthrottle = mxser_unthrottle,
 468         .set_termios = mxser_set_termios,
 469         .stop = mxser_stop,
 470         .start = mxser_start,
 471         .hangup = mxser_hangup,
 472         .break_ctl = mxser_rs_break,
 473         .wait_until_sent = mxser_wait_until_sent,
 474         .tiocmget = mxser_tiocmget,
 475         .tiocmset = mxser_tiocmset,
 476 };
 477
 478 /*
 479  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 480  */
 481
 482 static int __init mxser_module_init(void)
 483 {
 484         int ret;
 485
 486         if (verbose)
 487                 printk(KERN_DEBUG "Loading module mxser ...\n");
 488         ret = mxser_init();
 489         if (verbose)
 490                 printk(KERN_DEBUG "Done.\n");
 491         return ret;
 492 }
 493
 494 static void __exit mxser_module_exit(void)
 495 {
 496         int i, err;
 497
 498         if (verbose)
 499                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 500
 501         err = tty_unregister_driver(mxvar_sdriver);
 502         if (!err)
 503                 put_tty_driver(mxvar_sdriver);
 504         else
 505                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 506
 507
 508         for (i = 0; i < MXSER_BOARDS; i++) {
 509                 struct pci_dev *pdev;
 510
 511                 if (mxsercfg[i].board_type == -1)
 512                         continue;
 513                 else {
 514                         pdev = mxsercfg[i].pciInfo.pdev;
 515                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 516                         if (pdev != NULL) {     //PCI
 517                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 518                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 519                         } else {
 520                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 521                                 release_region(mxsercfg[i].vector, 1);
 522                         }
 523                 }
 524         }
 525         if (verbose)
 526                 printk(KERN_DEBUG "Done.\n");
 527
 528 }
 529
 530 static void process_txrx_fifo(struct mxser_struct *info)
 531 {
 532         int i;
 533
 534         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 535                 info->rx_trigger = 1;
 536                 info->rx_high_water = 1;
 537                 info->rx_low_water = 1;
 538                 info->xmit_fifo_size = 1;
 539         } else {
 540                 for (i = 0; i < UART_INFO_NUM; i++) {
 541                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 542                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 543                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 544                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 545                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 546                                 break;
 547                         }
 548                 }
 549         }
 550 }
 551
 552 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 553 {
 554         struct mxser_struct *info;
 555         int retval;
 556         int i, n;
 557
 558         n = board * MXSER_PORTS_PER_BOARD;
 559         info = &mxvar_table[n];
 560         /*if (verbose) */  {
 561                 printk(KERN_DEBUG "        ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
 562                 printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
 563         }
 564
 565         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 566                 info->port = n;
 567                 info->base = hwconf->ioaddr[i];
 568                 info->irq = hwconf->irq;
 569                 info->vector = hwconf->vector;
 570                 info->vectormask = hwconf->vector_mask;
 571                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
 572                 info->stop_rx = 0;
 573                 info->ldisc_stop_rx = 0;
 574
 575                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 576                 //Enhance mode enabled here
 577                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 578                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 579                 }
 580
 581                 info->flags = ASYNC_SHARE_IRQ;
 582                 info->type = hwconf->uart_type;
 583                 info->baud_base = hwconf->baud_base[i];
 584
 585                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 586
 587                 process_txrx_fifo(info);
 588
 589
 590                 info->custom_divisor = hwconf->baud_base[i] * 16;
 591                 info->close_delay = 5 * HZ / 10;
 592                 info->closing_wait = 30 * HZ;
 593                 INIT_WORK(&info->tqueue, mxser_do_softint, info);
 594                 info->normal_termios = mxvar_sdriver->init_termios;
 595                 init_waitqueue_head(&info->open_wait);
 596                 init_waitqueue_head(&info->close_wait);
 597                 init_waitqueue_head(&info->delta_msr_wait);
 598                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 599                 info->err_shadow = 0;
 600                 spin_lock_init(&info->slock);
 601         }
 602         /*
 603          * Allocate the IRQ if necessary
 604          */
 605
 606
 607         /* before set INT ISR, disable all int */
 608         for (i = 0; i < hwconf->ports; i++) {
 609                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
 610         }
 611
 612         n = board * MXSER_PORTS_PER_BOARD;
 613         info = &mxvar_table[n];
 614
 615         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
 616         if (retval) {
 617                 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
 618                 printk("  Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
 619                 return retval;
 620         }
 621         return 0;
 622 }
 623
 624
 625 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 626 {
 627         mxsercfg[board] = *hwconf;
 628 }
 629
 630 #ifdef CONFIG_PCI
 631 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 632 {
 633         int i, j;
 634 //      unsigned int    val;
 635         unsigned int ioaddress;
 636         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 637
 638         //io address
 639         hwconf->board_type = board_type;
 640         hwconf->ports = mxser_numports[board_type - 1];
 641         ioaddress = pci_resource_start(pdev, 2);
 642         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
 643
 644         for (i = 0; i < hwconf->ports; i++) {
 645                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 646         }
 647
 648         //vector
 649         ioaddress = pci_resource_start(pdev, 3);
 650         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
 651         hwconf->vector = ioaddress;
 652
 653         //irq
 654         hwconf->irq = hwconf->pciInfo.pdev->irq;
 655
 656         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 657         hwconf->uart_type = PORT_16550A;
 658         hwconf->vector_mask = 0;
 659
 660
 661         for (i = 0; i < hwconf->ports; i++) {
 662                 for (j = 0; j < UART_INFO_NUM; j++) {
 663                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 664                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 665
 666                                 //exception....CP-102
 667                                 if (board_type == MXSER_BOARD_CP102)
 668                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 669                                 break;
 670                         }
 671                 }
 672         }
 673
 674         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 675                 for (i = 0; i < hwconf->ports; i++) {
 676                         if (i < 4)
 677                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 678                         else
 679                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 680                 }
 681                 outb(0, ioaddress + 4); // default set to RS232 mode
 682                 outb(0, ioaddress + 0x0c);      //default set to RS232 mode
 683         }
 684
 685         for (i = 0; i < hwconf->ports; i++) {
 686                 hwconf->vector_mask |= (1 << i);
 687                 hwconf->baud_base[i] = 921600;
 688         }
 689         return (0);
 690 }
 691 #endif
 692
 693 static int mxser_init(void)
 694 {
 695         int i, m, retval, b, n;
 696         struct pci_dev *pdev = NULL;
 697         int index;
 698         unsigned char busnum, devnum;
 699         struct mxser_hwconf hwconf;
 700
 701         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 702         if (!mxvar_sdriver)
 703                 return -ENOMEM;
 704         spin_lock_init(&gm_lock);
 705
 706         for (i = 0; i < MXSER_BOARDS; i++) {
 707                 mxsercfg[i].board_type = -1;
 708         }
 709
 710         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
 711
 712         /* Initialize the tty_driver structure */
 713         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 714         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 715         mxvar_sdriver->name = "ttyM";
 716         mxvar_sdriver->major = ttymajor;
 717         mxvar_sdriver->minor_start = 0;
 718         mxvar_sdriver->num = MXSER_PORTS + 1;
 719         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 720         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 721         mxvar_sdriver->init_termios = tty_std_termios;
 722         mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 723         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 724         tty_set_operations(mxvar_sdriver, &mxser_ops);
 725         mxvar_sdriver->ttys = mxvar_tty;
 726         mxvar_sdriver->termios = mxvar_termios;
 727         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 728
 729         mxvar_diagflag = 0;
 730         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 731         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 732
 733         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 734         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 735         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 736         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 737
 738         m = 0;
 739         /* Start finding ISA boards here */
 740         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 741                 int cap;
 742                 if (!(cap = mxserBoardCAP[b]))
 743                         continue;
 744
 745                 retval = mxser_get_ISA_conf(cap, &hwconf);
 746
 747                 if (retval != 0)
 748                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 749
 750                 if (retval <= 0) {
 751                         if (retval == MXSER_ERR_IRQ)
 752                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 753                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 754                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 755                         else if (retval == MXSER_ERR_VECTOR)
 756                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 757                         else if (retval == MXSER_ERR_IOADDR)
 758                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 759
 760                         continue;
 761                 }
 762
 763                 hwconf.pciInfo.busNum = 0;
 764                 hwconf.pciInfo.devNum = 0;
 765                 hwconf.pciInfo.pdev = NULL;
 766
 767                 mxser_getcfg(m, &hwconf);
 768                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 769                 //mxser_initbrd will hook ISR.
 770                 if (mxser_initbrd(m, &hwconf) < 0)
 771                         continue;
 772
 773
 774                 m++;
 775         }
 776
 777         /* Start finding ISA boards from module arg */
 778         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 779                 int cap;
 780                 if (!(cap = ioaddr[b]))
 781                         continue;
 782
 783                 retval = mxser_get_ISA_conf(cap, &hwconf);
 784
 785                 if (retval != 0)
 786                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 787
 788                 if (retval <= 0) {
 789                         if (retval == MXSER_ERR_IRQ)
 790                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 791                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 792                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 793                         else if (retval == MXSER_ERR_VECTOR)
 794                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 795                         else if (retval == MXSER_ERR_IOADDR)
 796                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 797
 798                         continue;
 799                 }
 800
 801                 hwconf.pciInfo.busNum = 0;
 802                 hwconf.pciInfo.devNum = 0;
 803                 hwconf.pciInfo.pdev = NULL;
 804
 805                 mxser_getcfg(m, &hwconf);
 806                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 807                 //mxser_initbrd will hook ISR.
 808                 if (mxser_initbrd(m, &hwconf) < 0)
 809                         continue;
 810
 811                 m++;
 812         }
 813
 814         /* start finding PCI board here */
 815 #ifdef CONFIG_PCI
 816         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 817         index = 0;
 818         b = 0;
 819         while (b < n) {
 820                 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
 821                         if (pdev == NULL) {
 822                         b++;
 823                         continue;
 824                 }
 825                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 826                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 827                 hwconf.pciInfo.pdev = pdev;
 828                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
 829                 index++;
 830                 if (m >= MXSER_BOARDS) {
 831                         printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
 832                 } else {
 833                         if (pci_enable_device(pdev)) {
 834                                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
 835                                 continue;
 836                         }
 837                         retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
 838                         if (retval < 0) {
 839                                 if (retval == MXSER_ERR_IRQ)
 840                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 841                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 842                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 843                                 else if (retval == MXSER_ERR_VECTOR)
 844                                         printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 845                                 else if (retval == MXSER_ERR_IOADDR)
 846                                         printk(KERN_ERR "Invalid I/O address,board not configured\n");
 847                                 continue;
 848                         }
 849                         mxser_getcfg(m, &hwconf);
 850                         //init mxsercfg first, or mxsercfg data is not correct on ISR.
 851                         //mxser_initbrd will hook ISR.
 852                         if (mxser_initbrd(m, &hwconf) < 0)
 853                                 continue;
 854                         m++;
 855                 }
 856         }
 857 #endif
 858
 859         retval = tty_register_driver(mxvar_sdriver);
 860         if (retval) {
 861                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
 862                 put_tty_driver(mxvar_sdriver);
 863
 864                 for (i = 0; i < MXSER_BOARDS; i++) {
 865                         if (mxsercfg[i].board_type == -1)
 866                                 continue;
 867                         else {
 868                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 869                                 //todo: release io, vector
 870                         }
 871                 }
 872                 return retval;
 873         }
 874
 875         return 0;
 876 }
 877
 878 static void mxser_do_softint(void *private_)
 879 {
 880         struct mxser_struct *info = (struct mxser_struct *) private_;
 881         struct tty_struct *tty;
 882
 883         tty = info->tty;
 884
 885         if (tty) {
 886                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 887                         tty_wakeup(tty);
 888                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 889                         tty_hangup(tty);
 890         }
 891 }
 892
 893 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 894 {
 895         unsigned char status = 0;
 896
 897         status = inb(baseaddr + UART_MSR);
 898
 899         mxser_msr[port] &= 0x0F;
 900         mxser_msr[port] |= status;
 901         status = mxser_msr[port];
 902         if (mode)
 903                 mxser_msr[port] = 0;
 904
 905         return status;
 906 }
 907
 908 /*
 909  * This routine is called whenever a serial port is opened.  It
 910  * enables interrupts for a serial port, linking in its async structure into
 911  * the IRQ chain.   It also performs the serial-specific
 912  * initialization for the tty structure.
 913  */
 914 static int mxser_open(struct tty_struct *tty, struct file *filp)
 915 {
 916         struct mxser_struct *info;
 917         int retval, line;
 918
 919         /* initialize driver_data in case something fails */
 920         tty->driver_data = NULL;
 921
 922         line = tty->index;
 923         if (line == MXSER_PORTS)
 924                 return 0;
 925         if (line < 0 || line > MXSER_PORTS)
 926                 return -ENODEV;
 927         info = mxvar_table + line;
 928         if (!info->base)
 929                 return (-ENODEV);
 930
 931         tty->driver_data = info;
 932         info->tty = tty;
 933         /*
 934          * Start up serial port
 935          */
 936         retval = mxser_startup(info);
 937         if (retval)
 938                 return (retval);
 939
 940         retval = mxser_block_til_ready(tty, filp, info);
 941         if (retval)
 942                 return (retval);
 943
 944         info->count++;
 945
 946         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 947                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 948                         *tty->termios = info->normal_termios;
 949                 else
 950                         *tty->termios = info->callout_termios;
 951                 mxser_change_speed(info, NULL);
 952         }
 953
 954         info->session = current->signal->session;
 955         info->pgrp = process_group(current);
 956         clear_bit(TTY_DONT_FLIP, &tty->flags);
 957
 958         //status = mxser_get_msr(info->base, 0, info->port);
 959         //mxser_check_modem_status(info, status);
 960
 961 /* unmark here for very high baud rate (ex. 921600 bps) used
 962 */
 963         tty->low_latency = 1;
 964         return 0;
 965 }
 966
 967 /*
 968  * This routine is called when the serial port gets closed.  First, we
 969  * wait for the last remaining data to be sent.  Then, we unlink its
 970  * async structure from the interrupt chain if necessary, and we free
 971  * that IRQ if nothing is left in the chain.
 972  */
 973 static void mxser_close(struct tty_struct *tty, struct file *filp)
 974 {
 975         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
 976
 977         unsigned long timeout;
 978         unsigned long flags;
 979         struct tty_ldisc *ld;
 980
 981         if (tty->index == MXSER_PORTS)
 982                 return;
 983         if (!info)
 984                 return;
 985
 986         spin_lock_irqsave(&info->slock, flags);
 987
 988         if (tty_hung_up_p(filp)) {
 989                 spin_unlock_irqrestore(&info->slock, flags);
 990                 return;
 991         }
 992         if ((tty->count == 1) && (info->count != 1)) {
 993                 /*
 994                  * Uh, oh.  tty->count is 1, which means that the tty
 995                  * structure will be freed.  Info->count should always
 996                  * be one in these conditions.  If it's greater than
 997                  * one, we've got real problems, since it means the
 998                  * serial port won't be shutdown.
 999                  */
1000                 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
1001                 info->count = 1;
1002         }
1003         if (--info->count < 0) {
1004                 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1005                 info->count = 0;
1006         }
1007         if (info->count) {
1008                 spin_unlock_irqrestore(&info->slock, flags);
1009                 return;
1010         }
1011         info->flags |= ASYNC_CLOSING;
1012         spin_unlock_irqrestore(&info->slock, flags);
1013         /*
1014          * Save the termios structure, since this port may have
1015          * separate termios for callout and dialin.
1016          */
1017         if (info->flags & ASYNC_NORMAL_ACTIVE)
1018                 info->normal_termios = *tty->termios;
1019         /*
1020          * Now we wait for the transmit buffer to clear; and we notify
1021          * the line discipline to only process XON/XOFF characters.
1022          */
1023         tty->closing = 1;
1024         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1025                 tty_wait_until_sent(tty, info->closing_wait);
1026         /*
1027          * At this point we stop accepting input.  To do this, we
1028          * disable the receive line status interrupts, and tell the
1029          * interrupt driver to stop checking the data ready bit in the
1030          * line status register.
1031          */
1032         info->IER &= ~UART_IER_RLSI;
1033         if (info->IsMoxaMustChipFlag)
1034                 info->IER &= ~MOXA_MUST_RECV_ISR;
1035 /* by William
1036         info->read_status_mask &= ~UART_LSR_DR;
1037 */
1038         if (info->flags & ASYNC_INITIALIZED) {
1039                 outb(info->IER, info->base + UART_IER);
1040                 /*
1041                  * Before we drop DTR, make sure the UART transmitter
1042                  * has completely drained; this is especially
1043                  * important if there is a transmit FIFO!
1044                  */
1045                 timeout = jiffies + HZ;
1046                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1047                         schedule_timeout_interruptible(5);
1048                         if (time_after(jiffies, timeout))
1049                                 break;
1050                 }
1051         }
1052         mxser_shutdown(info);
1053
1054         if (tty->driver->flush_buffer)
1055                 tty->driver->flush_buffer(tty);
1056
1057         ld = tty_ldisc_ref(tty);
1058         if (ld) {
1059                 if(ld->flush_buffer)
1060                         ld->flush_buffer(tty);
1061                 tty_ldisc_deref(ld);
1062         }
1063
1064         tty->closing = 0;
1065         info->event = 0;
1066         info->tty = NULL;
1067         if (info->blocked_open) {
1068                 if (info->close_delay)
1069                         schedule_timeout_interruptible(info->close_delay);
1070                 wake_up_interruptible(&info->open_wait);
1071         }
1072
1073         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1074         wake_up_interruptible(&info->close_wait);
1075
1076 }
1077
1078 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1079 {
1080         int c, total = 0;
1081         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1082         unsigned long flags;
1083
1084         if (!tty || !info->xmit_buf)
1085                 return (0);
1086
1087         while (1) {
1088                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1089                 if (c <= 0)
1090                         break;
1091
1092                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1093                 spin_lock_irqsave(&info->slock, flags);
1094                 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1095                 info->xmit_cnt += c;
1096                 spin_unlock_irqrestore(&info->slock, flags);
1097
1098                 buf += c;
1099                 count -= c;
1100                 total += c;
1101
1102         }
1103
1104         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1105                 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1106                         spin_lock_irqsave(&info->slock, flags);
1107                         info->IER |= UART_IER_THRI;
1108                         outb(info->IER, info->base + UART_IER);
1109                         spin_unlock_irqrestore(&info->slock, flags);
1110                 }
1111         }
1112         return total;
1113 }
1114
1115 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1116 {
1117         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1118         unsigned long flags;
1119
1120         if (!tty || !info->xmit_buf)
1121                 return;
1122
1123         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1124                 return;
1125
1126         spin_lock_irqsave(&info->slock, flags);
1127         info->xmit_buf[info->xmit_head++] = ch;
1128         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1129         info->xmit_cnt++;
1130         spin_unlock_irqrestore(&info->slock, flags);
1131         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1132                 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1133                         spin_lock_irqsave(&info->slock, flags);
1134                         info->IER |= UART_IER_THRI;
1135                         outb(info->IER, info->base + UART_IER);
1136                         spin_unlock_irqrestore(&info->slock, flags);
1137                 }
1138         }
1139 }
1140
1141
1142 static void mxser_flush_chars(struct tty_struct *tty)
1143 {
1144         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1145         unsigned long flags;
1146
1147         if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1148                 return;
1149
1150         spin_lock_irqsave(&info->slock, flags);
1151
1152         info->IER |= UART_IER_THRI;
1153         outb(info->IER, info->base + UART_IER);
1154
1155         spin_unlock_irqrestore(&info->slock, flags);
1156 }
1157
1158 static int mxser_write_room(struct tty_struct *tty)
1159 {
1160         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1161         int ret;
1162
1163         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1164         if (ret < 0)
1165                 ret = 0;
1166         return (ret);
1167 }
1168
1169 static int mxser_chars_in_buffer(struct tty_struct *tty)
1170 {
1171         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1172         return info->xmit_cnt;
1173 }
1174
1175 static void mxser_flush_buffer(struct tty_struct *tty)
1176 {
1177         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1178         char fcr;
1179         unsigned long flags;
1180
1181
1182         spin_lock_irqsave(&info->slock, flags);
1183         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1184
1185         /* below added by shinhay */
1186         fcr = inb(info->base + UART_FCR);
1187         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1188         outb(fcr, info->base + UART_FCR);
1189
1190         spin_unlock_irqrestore(&info->slock, flags);
1191         /* above added by shinhay */
1192
1193         wake_up_interruptible(&tty->write_wait);
1194         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1195                 (tty->ldisc.write_wakeup) (tty);
1196 }
1197
1198 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1199 {
1200         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1201         int retval;
1202         struct async_icount cprev, cnow;        /* kernel counter temps */
1203         struct serial_icounter_struct __user *p_cuser;
1204         unsigned long templ;
1205         unsigned long flags;
1206         void __user *argp = (void __user *)arg;
1207
1208         if (tty->index == MXSER_PORTS)
1209                 return (mxser_ioctl_special(cmd, argp));
1210
1211         // following add by Victor Yu. 01-05-2004
1212         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1213                 int opmode, p;
1214                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1215                 int shiftbit;
1216                 unsigned char val, mask;
1217
1218                 p = info->port % 4;
1219                 if (cmd == MOXA_SET_OP_MODE) {
1220                         if (get_user(opmode, (int __user *) argp))
1221                                 return -EFAULT;
1222                         if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1223                                 return -EFAULT;
1224                         mask = ModeMask[p];
1225                         shiftbit = p * 2;
1226                         val = inb(info->opmode_ioaddr);
1227                         val &= mask;
1228                         val |= (opmode << shiftbit);
1229                         outb(val, info->opmode_ioaddr);
1230                 } else {
1231                         shiftbit = p * 2;
1232                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1233                         opmode &= OP_MODE_MASK;
1234                         if (copy_to_user(argp, &opmode, sizeof(int)))
1235                                 return -EFAULT;
1236                 }
1237                 return 0;
1238         }
1239         // above add by Victor Yu. 01-05-2004
1240
1241         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1242                 if (tty->flags & (1 << TTY_IO_ERROR))
1243                         return (-EIO);
1244         }
1245         switch (cmd) {
1246         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1247                 retval = tty_check_change(tty);
1248                 if (retval)
1249                         return (retval);
1250                 tty_wait_until_sent(tty, 0);
1251                 if (!arg)
1252                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1253                 return (0);
1254         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1255                 retval = tty_check_change(tty);
1256                 if (retval)
1257                         return (retval);
1258                 tty_wait_until_sent(tty, 0);
1259                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1260                 return (0);
1261         case TIOCGSOFTCAR:
1262                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1263         case TIOCSSOFTCAR:
1264                 if (get_user(templ, (unsigned long __user *) argp))
1265                         return -EFAULT;
1266                 arg = templ;
1267                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1268                 return (0);
1269         case TIOCGSERIAL:
1270                 return mxser_get_serial_info(info, argp);
1271         case TIOCSSERIAL:
1272                 return mxser_set_serial_info(info, argp);
1273         case TIOCSERGETLSR:     /* Get line status register */
1274                 return mxser_get_lsr_info(info, argp);
1275                 /*
1276                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1277                  * - mask passed in arg for lines of interest
1278                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1279                  * Caller should use TIOCGICOUNT to see which one it was
1280                  */
1281         case TIOCMIWAIT:{
1282                         DECLARE_WAITQUEUE(wait, current);
1283                         int ret;
1284                         spin_lock_irqsave(&info->slock, flags);
1285                         cprev = info->icount;   /* note the counters on entry */
1286                         spin_unlock_irqrestore(&info->slock, flags);
1287
1288                         add_wait_queue(&info->delta_msr_wait, &wait);
1289                         while (1) {
1290                                 spin_lock_irqsave(&info->slock, flags);
1291                                 cnow = info->icount;    /* atomic copy */
1292                                 spin_unlock_irqrestore(&info->slock, flags);
1293
1294                                 set_current_state(TASK_INTERRUPTIBLE);
1295                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1296                                         ret = 0;
1297                                         break;
1298                                 }
1299                                 /* see if a signal did it */
1300                                 if (signal_pending(current)) {
1301                                         ret = -ERESTARTSYS;
1302                                         break;
1303                                 }
1304                                 cprev = cnow;
1305                         }
1306                         current->state = TASK_RUNNING;
1307                         remove_wait_queue(&info->delta_msr_wait, &wait);
1308                         break;
1309                 }
1310                 /* NOTREACHED */
1311                 /*
1312                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1313                  * Return: write counters to the user passed counter struct
1314                  * NB: both 1->0 and 0->1 transitions are counted except for
1315                  *     RI where only 0->1 is counted.
1316                  */
1317         case TIOCGICOUNT:
1318                 spin_lock_irqsave(&info->slock, flags);
1319                 cnow = info->icount;
1320                 spin_unlock_irqrestore(&info->slock, flags);
1321                 p_cuser = argp;
1322                 /* modified by casper 1/11/2000 */
1323                 if (put_user(cnow.frame, &p_cuser->frame))
1324                         return -EFAULT;
1325                 if (put_user(cnow.brk, &p_cuser->brk))
1326                         return -EFAULT;
1327                 if (put_user(cnow.overrun, &p_cuser->overrun))
1328                         return -EFAULT;
1329                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1330                         return -EFAULT;
1331                 if (put_user(cnow.parity, &p_cuser->parity))
1332                         return -EFAULT;
1333                 if (put_user(cnow.rx, &p_cuser->rx))
1334                         return -EFAULT;
1335                 if (put_user(cnow.tx, &p_cuser->tx))
1336                         return -EFAULT;
1337                 put_user(cnow.cts, &p_cuser->cts);
1338                 put_user(cnow.dsr, &p_cuser->dsr);
1339                 put_user(cnow.rng, &p_cuser->rng);
1340                 put_user(cnow.dcd, &p_cuser->dcd);
1341
1342 /* */
1343                 return 0;
1344         case MOXA_HighSpeedOn:
1345                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1346
1347         case MOXA_SDS_RSTICOUNTER:{
1348                         info->mon_data.rxcnt = 0;
1349                         info->mon_data.txcnt = 0;
1350                         return 0;
1351                 }
1352 // (above) added by James.
1353         case MOXA_ASPP_SETBAUD:{
1354                         long baud;
1355                         if (get_user(baud, (long __user *) argp))
1356                                 return -EFAULT;
1357                         mxser_set_baud(info, baud);
1358                         return 0;
1359                 }
1360         case MOXA_ASPP_GETBAUD:
1361                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1362                         return -EFAULT;
1363
1364                 return 0;
1365
1366         case MOXA_ASPP_OQUEUE:{
1367                         int len, lsr;
1368
1369                         len = mxser_chars_in_buffer(tty);
1370
1371                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1372
1373                         len += (lsr ? 0 : 1);
1374
1375                         if (copy_to_user(argp, &len, sizeof(int)))
1376                                 return -EFAULT;
1377
1378                         return 0;
1379                 }
1380         case MOXA_ASPP_MON:{
1381                         int mcr, status;
1382 //      info->mon_data.ser_param = tty->termios->c_cflag;
1383
1384                         status = mxser_get_msr(info->base, 1, info->port, info);
1385                         mxser_check_modem_status(info, status);
1386
1387                         mcr = inb(info->base + UART_MCR);
1388                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1389                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1390                         else
1391                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1392
1393                         if (mcr & MOXA_MUST_MCR_TX_XON)
1394                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1395                         else
1396                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1397
1398                         if (info->tty->hw_stopped)
1399                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1400                         else
1401                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1402
1403
1404                         if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1405                                 return -EFAULT;
1406
1407                         return 0;
1408
1409                 }
1410
1411         case MOXA_ASPP_LSTATUS:{
1412                         if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1413                                 return -EFAULT;
1414
1415                         info->err_shadow = 0;
1416                         return 0;
1417
1418                 }
1419         case MOXA_SET_BAUD_METHOD:{
1420                         int method;
1421                         if (get_user(method, (int __user *) argp))
1422                                 return -EFAULT;
1423                         mxser_set_baud_method[info->port] = method;
1424                         if (copy_to_user(argp, &method, sizeof(int)))
1425                                 return -EFAULT;
1426
1427                         return 0;
1428                 }
1429         default:
1430                 return -ENOIOCTLCMD;
1431         }
1432         return 0;
1433 }
1434
1435 #ifndef CMSPAR
1436 #define CMSPAR 010000000000
1437 #endif
1438
1439 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1440 {
1441         int i, result, status;
1442
1443         switch (cmd) {
1444         case MOXA_GET_CONF:
1445                 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1446                         return -EFAULT;
1447                 return 0;
1448         case MOXA_GET_MAJOR:
1449                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1450                         return -EFAULT;
1451                 return 0;
1452
1453         case MOXA_GET_CUMAJOR:
1454                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1455                         return -EFAULT;
1456                 return 0;
1457
1458         case MOXA_CHKPORTENABLE:
1459                 result = 0;
1460                 for (i = 0; i < MXSER_PORTS; i++) {
1461                         if (mxvar_table[i].base)
1462                                 result |= (1 << i);
1463                 }
1464                 return put_user(result, (unsigned long __user *) argp);
1465         case MOXA_GETDATACOUNT:
1466                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1467                         return -EFAULT;
1468                 return (0);
1469         case MOXA_GETMSTATUS:
1470                 for (i = 0; i < MXSER_PORTS; i++) {
1471                         GMStatus[i].ri = 0;
1472                         if (!mxvar_table[i].base) {
1473                                 GMStatus[i].dcd = 0;
1474                                 GMStatus[i].dsr = 0;
1475                                 GMStatus[i].cts = 0;
1476                                 continue;
1477                         }
1478
1479                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1480                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1481                         else
1482                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1483
1484                         status = inb(mxvar_table[i].base + UART_MSR);
1485                         if (status & 0x80 /*UART_MSR_DCD */ )
1486                                 GMStatus[i].dcd = 1;
1487                         else
1488                                 GMStatus[i].dcd = 0;
1489
1490                         if (status & 0x20 /*UART_MSR_DSR */ )
1491                                 GMStatus[i].dsr = 1;
1492                         else
1493                                 GMStatus[i].dsr = 0;
1494
1495
1496                         if (status & 0x10 /*UART_MSR_CTS */ )
1497                                 GMStatus[i].cts = 1;
1498                         else
1499                                 GMStatus[i].cts = 0;
1500                 }
1501                 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1502                         return -EFAULT;
1503                 return 0;
1504         case MOXA_ASPP_MON_EXT:{
1505                         int status;
1506                         int opmode, p;
1507                         int shiftbit;
1508                         unsigned cflag, iflag;
1509
1510                         for (i = 0; i < MXSER_PORTS; i++) {
1511
1512                                 if (!mxvar_table[i].base)
1513                                         continue;
1514
1515                                 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1516 //                      mxser_check_modem_status(&mxvar_table[i], status);
1517                                 if (status & UART_MSR_TERI)
1518                                         mxvar_table[i].icount.rng++;
1519                                 if (status & UART_MSR_DDSR)
1520                                         mxvar_table[i].icount.dsr++;
1521                                 if (status & UART_MSR_DDCD)
1522                                         mxvar_table[i].icount.dcd++;
1523                                 if (status & UART_MSR_DCTS)
1524                                         mxvar_table[i].icount.cts++;
1525
1526                                 mxvar_table[i].mon_data.modem_status = status;
1527                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1528                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1529                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1530                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1531                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1532                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1533
1534                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1535                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1536                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1537                                 } else {
1538                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1539                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1540                                 }
1541
1542                                 mon_data_ext.databits[i] = cflag & CSIZE;
1543
1544                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1545
1546                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1547
1548                                 mon_data_ext.flowctrl[i] = 0x00;
1549
1550                                 if (cflag & CRTSCTS)
1551                                         mon_data_ext.flowctrl[i] |= 0x03;
1552
1553                                 if (iflag & (IXON | IXOFF))
1554                                         mon_data_ext.flowctrl[i] |= 0x0C;
1555
1556                                 if (mxvar_table[i].type == PORT_16550A)
1557                                         mon_data_ext.fifo[i] = 1;
1558                                 else
1559                                         mon_data_ext.fifo[i] = 0;
1560
1561                                 p = i % 4;
1562                                 shiftbit = p * 2;
1563                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1564                                 opmode &= OP_MODE_MASK;
1565
1566                                 mon_data_ext.iftype[i] = opmode;
1567
1568                         }
1569                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1570                                 return -EFAULT;
1571
1572                         return 0;
1573
1574                 }
1575         default:
1576                 return -ENOIOCTLCMD;
1577         }
1578         return 0;
1579 }
1580
1581
1582 static void mxser_stoprx(struct tty_struct *tty)
1583 {
1584         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1585         //unsigned long flags;
1586
1587
1588         info->ldisc_stop_rx = 1;
1589         if (I_IXOFF(tty)) {
1590
1591                 //MX_LOCK(&info->slock);
1592                 // following add by Victor Yu. 09-02-2002
1593                 if (info->IsMoxaMustChipFlag) {
1594                         info->IER &= ~MOXA_MUST_RECV_ISR;
1595                         outb(info->IER, info->base + UART_IER);
1596                 } else {
1597                         // above add by Victor Yu. 09-02-2002
1598
1599                         info->x_char = STOP_CHAR(tty);
1600                         //      outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1601                         outb(0, info->base + UART_IER);
1602                         info->IER |= UART_IER_THRI;
1603                         outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1604                 }               // add by Victor Yu. 09-02-2002
1605                 //MX_UNLOCK(&info->slock);
1606         }
1607
1608         if (info->tty->termios->c_cflag & CRTSCTS) {
1609                 //MX_LOCK(&info->slock);
1610                 info->MCR &= ~UART_MCR_RTS;
1611                 outb(info->MCR, info->base + UART_MCR);
1612                 //MX_UNLOCK(&info->slock);
1613         }
1614 }
1615
1616 static void mxser_startrx(struct tty_struct *tty)
1617 {
1618         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1619         //unsigned long flags;
1620
1621         info->ldisc_stop_rx = 0;
1622         if (I_IXOFF(tty)) {
1623                 if (info->x_char)
1624                         info->x_char = 0;
1625                 else {
1626                         //MX_LOCK(&info->slock);
1627
1628                         // following add by Victor Yu. 09-02-2002
1629                         if (info->IsMoxaMustChipFlag) {
1630                                 info->IER |= MOXA_MUST_RECV_ISR;
1631                                 outb(info->IER, info->base + UART_IER);
1632                         } else {
1633                                 // above add by Victor Yu. 09-02-2002
1634
1635                                 info->x_char = START_CHAR(tty);
1636                                 //          outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1637                                 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1638                                 info->IER |= UART_IER_THRI;     /* force Tx interrupt */
1639                                 outb(info->IER, info->base + UART_IER);
1640                         }       // add by Victor Yu. 09-02-2002
1641                         //MX_UNLOCK(&info->slock);
1642                 }
1643         }
1644
1645         if (info->tty->termios->c_cflag & CRTSCTS) {
1646                 //MX_LOCK(&info->slock);
1647                 info->MCR |= UART_MCR_RTS;
1648                 outb(info->MCR, info->base + UART_MCR);
1649                 //MX_UNLOCK(&info->slock);
1650         }
1651 }
1652
1653 /*
1654  * This routine is called by the upper-layer tty layer to signal that
1655  * incoming characters should be throttled.
1656  */
1657 static void mxser_throttle(struct tty_struct *tty)
1658 {
1659         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1660         //unsigned long flags;
1661         //MX_LOCK(&info->slock);
1662         mxser_stoprx(tty);
1663         //MX_UNLOCK(&info->slock);
1664 }
1665
1666 static void mxser_unthrottle(struct tty_struct *tty)
1667 {
1668         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1669         //unsigned long flags;
1670         //MX_LOCK(&info->slock);
1671         mxser_startrx(tty);
1672         //MX_UNLOCK(&info->slock);
1673 }
1674
1675 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1676 {
1677         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1678         unsigned long flags;
1679
1680         if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1681
1682                 mxser_change_speed(info, old_termios);
1683
1684                 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1685                         tty->hw_stopped = 0;
1686                         mxser_start(tty);
1687                 }
1688         }
1689
1690 /* Handle sw stopped */
1691         if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1692                 tty->stopped = 0;
1693
1694                 // following add by Victor Yu. 09-02-2002
1695                 if (info->IsMoxaMustChipFlag) {
1696                         spin_lock_irqsave(&info->slock, flags);
1697                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1698                         spin_unlock_irqrestore(&info->slock, flags);
1699                 }
1700                 // above add by Victor Yu. 09-02-2002
1701
1702                 mxser_start(tty);
1703         }
1704 }
1705
1706 /*
1707  * mxser_stop() and mxser_start()
1708  *
1709  * This routines are called before setting or resetting tty->stopped.
1710  * They enable or disable transmitter interrupts, as necessary.
1711  */
1712 static void mxser_stop(struct tty_struct *tty)
1713 {
1714         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1715         unsigned long flags;
1716
1717         spin_lock_irqsave(&info->slock, flags);
1718         if (info->IER & UART_IER_THRI) {
1719                 info->IER &= ~UART_IER_THRI;
1720                 outb(info->IER, info->base + UART_IER);
1721         }
1722         spin_unlock_irqrestore(&info->slock, flags);
1723 }
1724
1725 static void mxser_start(struct tty_struct *tty)
1726 {
1727         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1728         unsigned long flags;
1729
1730         spin_lock_irqsave(&info->slock, flags);
1731         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1732                 info->IER |= UART_IER_THRI;
1733                 outb(info->IER, info->base + UART_IER);
1734         }
1735         spin_unlock_irqrestore(&info->slock, flags);
1736 }
1737
1738 /*
1739  * mxser_wait_until_sent() --- wait until the transmitter is empty
1740  */
1741 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1742 {
1743         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1744         unsigned long orig_jiffies, char_time;
1745         int lsr;
1746
1747         if (info->type == PORT_UNKNOWN)
1748                 return;
1749
1750         if (info->xmit_fifo_size == 0)
1751                 return;         /* Just in case.... */
1752
1753         orig_jiffies = jiffies;
1754         /*
1755          * Set the check interval to be 1/5 of the estimated time to
1756          * send a single character, and make it at least 1.  The check
1757          * interval should also be less than the timeout.
1758          *
1759          * Note: we have to use pretty tight timings here to satisfy
1760          * the NIST-PCTS.
1761          */
1762         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1763         char_time = char_time / 5;
1764         if (char_time == 0)
1765                 char_time = 1;
1766         if (timeout && timeout < char_time)
1767                 char_time = timeout;
1768         /*
1769          * If the transmitter hasn't cleared in twice the approximate
1770          * amount of time to send the entire FIFO, it probably won't
1771          * ever clear.  This assumes the UART isn't doing flow
1772          * control, which is currently the case.  Hence, if it ever
1773          * takes longer than info->timeout, this is probably due to a
1774          * UART bug of some kind.  So, we clamp the timeout parameter at
1775          * 2*info->timeout.
1776          */
1777         if (!timeout || timeout > 2 * info->timeout)
1778                 timeout = 2 * info->timeout;
1779 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1780         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1781         printk("jiff=%lu...", jiffies);
1782 #endif
1783         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1784 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1785                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1786 #endif
1787                 schedule_timeout_interruptible(char_time);
1788                 if (signal_pending(current))
1789                         break;
1790                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1791                         break;
1792         }
1793         set_current_state(TASK_RUNNING);
1794
1795 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1796         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1797 #endif
1798 }
1799
1800
1801 /*
1802  * This routine is called by tty_hangup() when a hangup is signaled.
1803  */
1804 void mxser_hangup(struct tty_struct *tty)
1805 {
1806         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1807
1808         mxser_flush_buffer(tty);
1809         mxser_shutdown(info);
1810         info->event = 0;
1811         info->count = 0;
1812         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1813         info->tty = NULL;
1814         wake_up_interruptible(&info->open_wait);
1815 }
1816
1817
1818 // added by James 03-12-2004.
1819 /*
1820  * mxser_rs_break() --- routine which turns the break handling on or off
1821  */
1822 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1823 {
1824         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1825         unsigned long flags;
1826
1827         spin_lock_irqsave(&info->slock, flags);
1828         if (break_state == -1)
1829                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1830         else
1831                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1832         spin_unlock_irqrestore(&info->slock, flags);
1833 }
1834
1835 // (above) added by James.
1836
1837
1838 /*
1839  * This is the serial driver's generic interrupt routine
1840  */
1841 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1842 {
1843         int status, iir, i;
1844         struct mxser_struct *info;
1845         struct mxser_struct *port;
1846         int max, irqbits, bits, msr;
1847         int pass_counter = 0;
1848         int handled = IRQ_NONE;
1849
1850         port = NULL;
1851         //spin_lock(&gm_lock);
1852
1853         for (i = 0; i < MXSER_BOARDS; i++) {
1854                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1855                         port = dev_id;
1856                         break;
1857                 }
1858         }
1859
1860         if (i == MXSER_BOARDS) {
1861                 goto irq_stop;
1862         }
1863         if (port == 0) {
1864                 goto irq_stop;
1865         }
1866         max = mxser_numports[mxsercfg[i].board_type - 1];
1867         while (1) {
1868                 irqbits = inb(port->vector) & port->vectormask;
1869                 if (irqbits == port->vectormask) {
1870                         break;
1871                 }
1872
1873                 handled = IRQ_HANDLED;
1874                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1875                         if (irqbits == port->vectormask) {
1876                                 break;
1877                         }
1878                         if (bits & irqbits)
1879                                 continue;
1880                         info = port + i;
1881
1882                         // following add by Victor Yu. 09-13-2002
1883                         iir = inb(info->base + UART_IIR);
1884                         if (iir & UART_IIR_NO_INT)
1885                                 continue;
1886                         iir &= MOXA_MUST_IIR_MASK;
1887                         if (!info->tty) {
1888                                 status = inb(info->base + UART_LSR);
1889                                 outb(0x27, info->base + UART_FCR);
1890                                 inb(info->base + UART_MSR);
1891                                 continue;
1892                         }
1893                         // above add by Victor Yu. 09-13-2002
1894                         /*
1895                            if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1896                            info->IER |= MOXA_MUST_RECV_ISR;
1897                            outb(info->IER, info->base + UART_IER);
1898                            }
1899                          */
1900
1901
1902                         /* mask by Victor Yu. 09-13-2002
1903                            if ( !info->tty ||
1904                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1905                            continue;
1906                          */
1907                         /* mask by Victor Yu. 09-02-2002
1908                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1909                          */
1910
1911                         // following add by Victor Yu. 09-02-2002
1912                         status = inb(info->base + UART_LSR);
1913
1914                         if (status & UART_LSR_PE) {
1915                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1916                         }
1917                         if (status & UART_LSR_FE) {
1918                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1919                         }
1920                         if (status & UART_LSR_OE) {
1921                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1922                         }
1923                         if (status & UART_LSR_BI)
1924                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
1925
1926                         if (info->IsMoxaMustChipFlag) {
1927                                 /*
1928                                    if ( (status & 0x02) && !(status & 0x01) ) {
1929                                    outb(info->base+UART_FCR,  0x23);
1930                                    continue;
1931                                    }
1932                                  */
1933                                 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1934                                         mxser_receive_chars(info, &status);
1935
1936                         } else {
1937                                 // above add by Victor Yu. 09-02-2002
1938
1939                                 status &= info->read_status_mask;
1940                                 if (status & UART_LSR_DR)
1941                                         mxser_receive_chars(info, &status);
1942                         }
1943                         msr = inb(info->base + UART_MSR);
1944                         if (msr & UART_MSR_ANY_DELTA) {
1945                                 mxser_check_modem_status(info, msr);
1946                         }
1947                         // following add by Victor Yu. 09-13-2002
1948                         if (info->IsMoxaMustChipFlag) {
1949                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1950                                         mxser_transmit_chars(info);
1951                                 }
1952                         } else {
1953                                 // above add by Victor Yu. 09-13-2002
1954
1955                                 if (status & UART_LSR_THRE) {
1956 /* 8-2-99 by William
1957                             if ( info->x_char || (info->xmit_cnt > 0) )
1958 */
1959                                         mxser_transmit_chars(info);
1960                                 }
1961                         }
1962                 }
1963                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1964                         break;  /* Prevent infinite loops */
1965                 }
1966         }
1967
1968       irq_stop:
1969         //spin_unlock(&gm_lock);
1970         return handled;
1971 }
1972
1973 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1974 {
1975         struct tty_struct *tty = info->tty;
1976         unsigned char ch, gdl;
1977         int ignored = 0;
1978         int cnt = 0;
1979         int recv_room;
1980         int max = 256;
1981         unsigned long flags;
1982
1983         spin_lock_irqsave(&info->slock, flags);
1984
1985         recv_room = tty->receive_room;
1986         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
1987                 //mxser_throttle(tty);
1988                 mxser_stoprx(tty);
1989                 //return;
1990         }
1991
1992         // following add by Victor Yu. 09-02-2002
1993         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
1994
1995                 if (*status & UART_LSR_SPECIAL) {
1996                         goto intr_old;
1997                 }
1998                 // following add by Victor Yu. 02-11-2004
1999                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2000                         goto intr_old;
2001                 // above add by Victor Yu. 02-14-2004
2002                 if (*status & MOXA_MUST_LSR_RERR)
2003                         goto intr_old;
2004
2005                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2006
2007                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)   // add by Victor Yu. 02-11-2004
2008                         gdl &= MOXA_MUST_GDL_MASK;
2009                 if (gdl >= recv_room) {
2010                         if (!info->ldisc_stop_rx) {
2011                                 //mxser_throttle(tty);
2012                                 mxser_stoprx(tty);
2013                         }
2014                         //return;
2015                 }
2016                 while (gdl--) {
2017                         ch = inb(info->base + UART_RX);
2018                         tty_insert_flip_char(tty, ch, 0);
2019                         cnt++;
2020                         /*
2021                            if((cnt>=HI_WATER) && (info->stop_rx==0)){
2022                            mxser_stoprx(tty);
2023                            info->stop_rx=1;
2024                            break;
2025                            } */
2026                 }
2027                 goto end_intr;
2028         }
2029 intr_old:
2030         // above add by Victor Yu. 09-02-2002
2031
2032         do {
2033                 if (max-- < 0)
2034                         break;
2035                 /*
2036                    if((cnt>=HI_WATER) && (info->stop_rx==0)){
2037                    mxser_stoprx(tty);
2038                    info->stop_rx=1;
2039                    break;
2040                    }
2041                  */
2042
2043                 ch = inb(info->base + UART_RX);
2044                 // following add by Victor Yu. 09-02-2002
2045                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2046                         outb(0x23, info->base + UART_FCR);
2047                 *status &= info->read_status_mask;
2048                 // above add by Victor Yu. 09-02-2002
2049                 if (*status & info->ignore_status_mask) {
2050                         if (++ignored > 100)
2051                                 break;
2052                 } else {
2053                         char flag = 0;
2054                         if (*status & UART_LSR_SPECIAL) {
2055                                 if (*status & UART_LSR_BI) {
2056                                         flag = TTY_BREAK;
2057 /* added by casper 1/11/2000 */
2058                                         info->icount.brk++;
2059 /* */
2060                                         if (info->flags & ASYNC_SAK)
2061                                                 do_SAK(tty);
2062                                 } else if (*status & UART_LSR_PE) {
2063                                         flag = TTY_PARITY;
2064 /* added by casper 1/11/2000 */
2065                                         info->icount.parity++;
2066 /* */
2067                                 } else if (*status & UART_LSR_FE) {
2068                                         flag = TTY_FRAME;
2069 /* added by casper 1/11/2000 */
2070                                         info->icount.frame++;
2071 /* */
2072                                 } else if (*status & UART_LSR_OE) {
2073                                         flag = TTY_OVERRUN;
2074 /* added by casper 1/11/2000 */
2075                                         info->icount.overrun++;
2076 /* */
2077                                 }
2078                         }
2079                         tty_insert_flip_char(tty, ch, flag);
2080                         cnt++;
2081                         if (cnt >= recv_room) {
2082                                 if (!info->ldisc_stop_rx) {
2083                                         //mxser_throttle(tty);
2084                                         mxser_stoprx(tty);
2085                                 }
2086                                 break;
2087                         }
2088
2089                 }
2090
2091                 // following add by Victor Yu. 09-02-2002
2092                 if (info->IsMoxaMustChipFlag)
2093                         break;
2094                 // above add by Victor Yu. 09-02-2002
2095
2096                 /* mask by Victor Yu. 09-02-2002
2097                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2098                  */
2099                 // following add by Victor Yu. 09-02-2002
2100                 *status = inb(info->base + UART_LSR);
2101                 // above add by Victor Yu. 09-02-2002
2102         } while (*status & UART_LSR_DR);
2103
2104 end_intr:               // add by Victor Yu. 09-02-2002
2105
2106         mxvar_log.rxcnt[info->port] += cnt;
2107         info->mon_data.rxcnt += cnt;
2108         info->mon_data.up_rxcnt += cnt;
2109         spin_unlock_irqrestore(&info->slock, flags);
2110
2111         tty_flip_buffer_push(tty);
2112 }
2113
2114 static void mxser_transmit_chars(struct mxser_struct *info)
2115 {
2116         int count, cnt;
2117         unsigned long flags;
2118
2119         spin_lock_irqsave(&info->slock, flags);
2120
2121         if (info->x_char) {
2122                 outb(info->x_char, info->base + UART_TX);
2123                 info->x_char = 0;
2124                 mxvar_log.txcnt[info->port]++;
2125                 info->mon_data.txcnt++;
2126                 info->mon_data.up_txcnt++;
2127
2128 /* added by casper 1/11/2000 */
2129                 info->icount.tx++;
2130 /* */
2131                 spin_unlock_irqrestore(&info->slock, flags);
2132                 return;
2133         }
2134
2135         if (info->xmit_buf == 0) {
2136                 spin_unlock_irqrestore(&info->slock, flags);
2137                 return;
2138         }
2139
2140         if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2141                 info->IER &= ~UART_IER_THRI;
2142                 outb(info->IER, info->base + UART_IER);
2143                 spin_unlock_irqrestore(&info->slock, flags);
2144                 return;
2145         }
2146
2147         cnt = info->xmit_cnt;
2148         count = info->xmit_fifo_size;
2149         do {
2150                 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2151                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2152                 if (--info->xmit_cnt <= 0)
2153                         break;
2154         } while (--count > 0);
2155         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2156
2157 // added by James 03-12-2004.
2158         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2159         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2160 // (above) added by James.
2161
2162 /* added by casper 1/11/2000 */
2163         info->icount.tx += (cnt - info->xmit_cnt);
2164 /* */
2165
2166         if (info->xmit_cnt < WAKEUP_CHARS) {
2167                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2168                 schedule_work(&info->tqueue);
2169         }
2170         if (info->xmit_cnt <= 0) {
2171                 info->IER &= ~UART_IER_THRI;
2172                 outb(info->IER, info->base + UART_IER);
2173         }
2174         spin_unlock_irqrestore(&info->slock, flags);
2175 }
2176
2177 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2178 {
2179         /* update input line counters */
2180         if (status & UART_MSR_TERI)
2181                 info->icount.rng++;
2182         if (status & UART_MSR_DDSR)
2183                 info->icount.dsr++;
2184         if (status & UART_MSR_DDCD)
2185                 info->icount.dcd++;
2186         if (status & UART_MSR_DCTS)
2187                 info->icount.cts++;
2188         info->mon_data.modem_status = status;
2189         wake_up_interruptible(&info->delta_msr_wait);
2190
2191
2192         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2193                 if (status & UART_MSR_DCD)
2194                         wake_up_interruptible(&info->open_wait);
2195                 schedule_work(&info->tqueue);
2196         }
2197
2198         if (info->flags & ASYNC_CTS_FLOW) {
2199                 if (info->tty->hw_stopped) {
2200                         if (status & UART_MSR_CTS) {
2201                                 info->tty->hw_stopped = 0;
2202
2203                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2204                                         info->IER |= UART_IER_THRI;
2205                                         outb(info->IER, info->base + UART_IER);
2206                                 }
2207                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2208                                 schedule_work(&info->tqueue);                   }
2209                 } else {
2210                         if (!(status & UART_MSR_CTS)) {
2211                                 info->tty->hw_stopped = 1;
2212                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2213                                         info->IER &= ~UART_IER_THRI;
2214                                         outb(info->IER, info->base + UART_IER);
2215                                 }
2216                         }
2217                 }
2218         }
2219 }
2220
2221 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2222 {
2223         DECLARE_WAITQUEUE(wait, current);
2224         int retval;
2225         int do_clocal = 0;
2226         unsigned long flags;
2227
2228         /*
2229          * If non-blocking mode is set, or the port is not enabled,
2230          * then make the check up front and then exit.
2231          */
2232         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2233                 info->flags |= ASYNC_NORMAL_ACTIVE;
2234                 return (0);
2235         }
2236
2237         if (tty->termios->c_cflag & CLOCAL)
2238                 do_clocal = 1;
2239
2240         /*
2241          * Block waiting for the carrier detect and the line to become
2242          * free (i.e., not in use by the callout).  While we are in
2243          * this loop, info->count is dropped by one, so that
2244          * mxser_close() knows when to free things.  We restore it upon
2245          * exit, either normal or abnormal.
2246          */
2247         retval = 0;
2248         add_wait_queue(&info->open_wait, &wait);
2249
2250         spin_lock_irqsave(&info->slock, flags);
2251         if (!tty_hung_up_p(filp))
2252                 info->count--;
2253         spin_unlock_irqrestore(&info->slock, flags);
2254         info->blocked_open++;
2255         while (1) {
2256                 spin_lock_irqsave(&info->slock, flags);
2257                 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2258                 spin_unlock_irqrestore(&info->slock, flags);
2259                 set_current_state(TASK_INTERRUPTIBLE);
2260                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2261                         if (info->flags & ASYNC_HUP_NOTIFY)
2262                                 retval = -EAGAIN;
2263                         else
2264                                 retval = -ERESTARTSYS;
2265                         break;
2266                 }
2267                 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2268                         break;
2269                 if (signal_pending(current)) {
2270                         retval = -ERESTARTSYS;
2271                         break;
2272                 }
2273                 schedule();
2274         }
2275         set_current_state(TASK_RUNNING);
2276         remove_wait_queue(&info->open_wait, &wait);
2277         if (!tty_hung_up_p(filp))
2278                 info->count++;
2279         info->blocked_open--;
2280         if (retval)
2281                 return (retval);
2282         info->flags |= ASYNC_NORMAL_ACTIVE;
2283         return (0);
2284 }
2285
2286 static int mxser_startup(struct mxser_struct *info)
2287 {
2288
2289         unsigned long page;
2290         unsigned long flags;
2291
2292         page = __get_free_page(GFP_KERNEL);
2293         if (!page)
2294                 return (-ENOMEM);
2295
2296         spin_lock_irqsave(&info->slock, flags);
2297
2298         if (info->flags & ASYNC_INITIALIZED) {
2299                 free_page(page);
2300                 spin_unlock_irqrestore(&info->slock, flags);
2301                 return (0);
2302         }
2303
2304         if (!info->base || !info->type) {
2305                 if (info->tty)
2306                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2307                 free_page(page);
2308                 spin_unlock_irqrestore(&info->slock, flags);
2309                 return (0);
2310         }
2311         if (info->xmit_buf)
2312                 free_page(page);
2313         else
2314                 info->xmit_buf = (unsigned char *) page;
2315
2316         /*
2317          * Clear the FIFO buffers and disable them
2318          * (they will be reenabled in mxser_change_speed())
2319          */
2320         if (info->IsMoxaMustChipFlag)
2321                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2322         else
2323                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2324
2325         /*
2326          * At this point there's no way the LSR could still be 0xFF;
2327          * if it is, then bail out, because there's likely no UART
2328          * here.
2329          */
2330         if (inb(info->base + UART_LSR) == 0xff) {
2331                 spin_unlock_irqrestore(&info->slock, flags);
2332                 if (capable(CAP_SYS_ADMIN)) {
2333                         if (info->tty)
2334                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2335                         return (0);
2336                 } else
2337                         return (-ENODEV);
2338         }
2339
2340         /*
2341          * Clear the interrupt registers.
2342          */
2343         (void) inb(info->base + UART_LSR);
2344         (void) inb(info->base + UART_RX);
2345         (void) inb(info->base + UART_IIR);
2346         (void) inb(info->base + UART_MSR);
2347
2348         /*
2349          * Now, initialize the UART
2350          */
2351         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2352         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2353         outb(info->MCR, info->base + UART_MCR);
2354
2355         /*
2356          * Finally, enable interrupts
2357          */
2358         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2359 //      info->IER = UART_IER_RLSI | UART_IER_RDI;
2360
2361         // following add by Victor Yu. 08-30-2002
2362         if (info->IsMoxaMustChipFlag)
2363                 info->IER |= MOXA_MUST_IER_EGDAI;
2364         // above add by Victor Yu. 08-30-2002
2365         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2366
2367         /*
2368          * And clear the interrupt registers again for luck.
2369          */
2370         (void) inb(info->base + UART_LSR);
2371         (void) inb(info->base + UART_RX);
2372         (void) inb(info->base + UART_IIR);
2373         (void) inb(info->base + UART_MSR);
2374
2375         if (info->tty)
2376                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2377         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2378
2379         /*
2380          * and set the speed of the serial port
2381          */
2382         spin_unlock_irqrestore(&info->slock, flags);
2383         mxser_change_speed(info, NULL);
2384
2385         info->flags |= ASYNC_INITIALIZED;
2386         return (0);
2387 }
2388
2389 /*
2390  * This routine will shutdown a serial port; interrupts maybe disabled, and
2391  * DTR is dropped if the hangup on close termio flag is on.
2392  */
2393 static void mxser_shutdown(struct mxser_struct *info)
2394 {
2395         unsigned long flags;
2396
2397         if (!(info->flags & ASYNC_INITIALIZED))
2398                 return;
2399
2400         spin_lock_irqsave(&info->slock, flags);
2401
2402         /*
2403          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2404          * here so the queue might never be waken up
2405          */
2406         wake_up_interruptible(&info->delta_msr_wait);
2407
2408         /*
2409          * Free the IRQ, if necessary
2410          */
2411         if (info->xmit_buf) {
2412                 free_page((unsigned long) info->xmit_buf);
2413                 info->xmit_buf = NULL;
2414         }
2415
2416         info->IER = 0;
2417         outb(0x00, info->base + UART_IER);
2418
2419         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2420                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2421         outb(info->MCR, info->base + UART_MCR);
2422
2423         /* clear Rx/Tx FIFO's */
2424         // following add by Victor Yu. 08-30-2002
2425         if (info->IsMoxaMustChipFlag)
2426                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2427         else
2428                 // above add by Victor Yu. 08-30-2002
2429                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2430
2431         /* read data port to reset things */
2432         (void) inb(info->base + UART_RX);
2433
2434         if (info->tty)
2435                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2436
2437         info->flags &= ~ASYNC_INITIALIZED;
2438
2439         // following add by Victor Yu. 09-23-2002
2440         if (info->IsMoxaMustChipFlag) {
2441                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2442         }
2443         // above add by Victor Yu. 09-23-2002
2444
2445         spin_unlock_irqrestore(&info->slock, flags);
2446 }
2447
2448 /*
2449  * This routine is called to set the UART divisor registers to match
2450  * the specified baud rate for a serial port.
2451  */
2452 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2453 {
2454         unsigned cflag, cval, fcr;
2455         int ret = 0;
2456         unsigned char status;
2457         long baud;
2458         unsigned long flags;
2459
2460
2461         if (!info->tty || !info->tty->termios)
2462                 return ret;
2463         cflag = info->tty->termios->c_cflag;
2464         if (!(info->base))
2465                 return ret;
2466
2467
2468 #ifndef B921600
2469 #define B921600 (B460800 +1)
2470 #endif
2471         if (mxser_set_baud_method[info->port] == 0) {
2472                 switch (cflag & (CBAUD | CBAUDEX)) {
2473                 case B921600:
2474                         baud = 921600;
2475                         break;
2476                 case B460800:
2477                         baud = 460800;
2478                         break;
2479                 case B230400:
2480                         baud = 230400;
2481                         break;
2482                 case B115200:
2483                         baud = 115200;
2484                         break;
2485                 case B57600:
2486                         baud = 57600;
2487                         break;
2488                 case B38400:
2489                         baud = 38400;
2490                         break;
2491                 case B19200:
2492                         baud = 19200;
2493                         break;
2494                 case B9600:
2495                         baud = 9600;
2496                         break;
2497                 case B4800:
2498                         baud = 4800;
2499                         break;
2500                 case B2400:
2501                         baud = 2400;
2502                         break;
2503                 case B1800:
2504                         baud = 1800;
2505                         break;
2506                 case B1200:
2507                         baud = 1200;
2508                         break;
2509                 case B600:
2510                         baud = 600;
2511                         break;
2512                 case B300:
2513                         baud = 300;
2514                         break;
2515                 case B200:
2516                         baud = 200;
2517                         break;
2518                 case B150:
2519                         baud = 150;
2520                         break;
2521                 case B134:
2522                         baud = 134;
2523                         break;
2524                 case B110:
2525                         baud = 110;
2526                         break;
2527                 case B75:
2528                         baud = 75;
2529                         break;
2530                 case B50:
2531                         baud = 50;
2532                         break;
2533                 default:
2534                         baud = 0;
2535                         break;
2536                 }
2537                 mxser_set_baud(info, baud);
2538         }
2539
2540         /* byte size and parity */
2541         switch (cflag & CSIZE) {
2542         case CS5:
2543                 cval = 0x00;
2544                 break;
2545         case CS6:
2546                 cval = 0x01;
2547                 break;
2548         case CS7:
2549                 cval = 0x02;
2550                 break;
2551         case CS8:
2552                 cval = 0x03;
2553                 break;
2554         default:
2555                 cval = 0x00;
2556                 break;          /* too keep GCC shut... */
2557         }
2558         if (cflag & CSTOPB)
2559                 cval |= 0x04;
2560         if (cflag & PARENB)
2561                 cval |= UART_LCR_PARITY;
2562         if (!(cflag & PARODD)) {
2563                 cval |= UART_LCR_EPAR;
2564         }
2565         if (cflag & CMSPAR)
2566                 cval |= UART_LCR_SPAR;
2567
2568         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2569                 if (info->IsMoxaMustChipFlag) {
2570                         fcr = UART_FCR_ENABLE_FIFO;
2571                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2572                         SET_MOXA_MUST_FIFO_VALUE(info);
2573                 } else
2574                         fcr = 0;
2575         } else {
2576                 fcr = UART_FCR_ENABLE_FIFO;
2577                 // following add by Victor Yu. 08-30-2002
2578                 if (info->IsMoxaMustChipFlag) {
2579                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2580                         SET_MOXA_MUST_FIFO_VALUE(info);
2581                 } else {
2582                         // above add by Victor Yu. 08-30-2002
2583
2584                         switch (info->rx_trigger) {
2585                         case 1:
2586                                 fcr |= UART_FCR_TRIGGER_1;
2587                                 break;
2588                         case 4:
2589                                 fcr |= UART_FCR_TRIGGER_4;
2590                                 break;
2591                         case 8:
2592                                 fcr |= UART_FCR_TRIGGER_8;
2593                                 break;
2594                         default:
2595                                 fcr |= UART_FCR_TRIGGER_14;
2596                                 break;
2597                         }
2598                 }
2599         }
2600
2601         /* CTS flow control flag and modem status interrupts */
2602         info->IER &= ~UART_IER_MSI;
2603         info->MCR &= ~UART_MCR_AFE;
2604         if (cflag & CRTSCTS) {
2605                 info->flags |= ASYNC_CTS_FLOW;
2606                 info->IER |= UART_IER_MSI;
2607                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2608                         info->MCR |= UART_MCR_AFE;
2609                         //status = mxser_get_msr(info->base, 0, info->port);
2610 /*      save_flags(flags);
2611         cli();
2612         status = inb(baseaddr + UART_MSR);
2613         restore_flags(flags);*/
2614                         //mxser_check_modem_status(info, status);
2615                 } else {
2616                         //status = mxser_get_msr(info->base, 0, info->port);
2617
2618                         //MX_LOCK(&info->slock);
2619                         status = inb(info->base + UART_MSR);
2620                         //MX_UNLOCK(&info->slock);
2621                         if (info->tty->hw_stopped) {
2622                                 if (status & UART_MSR_CTS) {
2623                                         info->tty->hw_stopped = 0;
2624                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2625                                                 info->IER |= UART_IER_THRI;
2626                                                 outb(info->IER, info->base + UART_IER);
2627                                         }
2628                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2629                                         schedule_work(&info->tqueue);                           }
2630                         } else {
2631                                 if (!(status & UART_MSR_CTS)) {
2632                                         info->tty->hw_stopped = 1;
2633                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2634                                                 info->IER &= ~UART_IER_THRI;
2635                                                 outb(info->IER, info->base + UART_IER);
2636                                         }
2637                                 }
2638                         }
2639                 }
2640         } else {
2641                 info->flags &= ~ASYNC_CTS_FLOW;
2642         }
2643         outb(info->MCR, info->base + UART_MCR);
2644         if (cflag & CLOCAL) {
2645                 info->flags &= ~ASYNC_CHECK_CD;
2646         } else {
2647                 info->flags |= ASYNC_CHECK_CD;
2648                 info->IER |= UART_IER_MSI;
2649         }
2650         outb(info->IER, info->base + UART_IER);
2651
2652         /*
2653          * Set up parity check flag
2654          */
2655         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2656         if (I_INPCK(info->tty))
2657                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2658         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2659                 info->read_status_mask |= UART_LSR_BI;
2660
2661         info->ignore_status_mask = 0;
2662
2663         if (I_IGNBRK(info->tty)) {
2664                 info->ignore_status_mask |= UART_LSR_BI;
2665                 info->read_status_mask |= UART_LSR_BI;
2666                 /*
2667                  * If we're ignore parity and break indicators, ignore
2668                  * overruns too.  (For real raw support).
2669                  */
2670                 if (I_IGNPAR(info->tty)) {
2671                         info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2672                         info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2673                 }
2674         }
2675         // following add by Victor Yu. 09-02-2002
2676         if (info->IsMoxaMustChipFlag) {
2677                 spin_lock_irqsave(&info->slock, flags);
2678                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2679                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2680                 if (I_IXON(info->tty)) {
2681                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2682                 } else {
2683                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2684                 }
2685                 if (I_IXOFF(info->tty)) {
2686                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2687                 } else {
2688                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2689                 }
2690                 /*
2691                    if ( I_IXANY(info->tty) ) {
2692                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2693                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2694                    } else {
2695                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2696                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2697                    }
2698                  */
2699                 spin_unlock_irqrestore(&info->slock, flags);
2700         }
2701         // above add by Victor Yu. 09-02-2002
2702
2703
2704         outb(fcr, info->base + UART_FCR);       /* set fcr */
2705         outb(cval, info->base + UART_LCR);
2706
2707         return ret;
2708 }
2709
2710
2711 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2712 {
2713         int quot = 0;
2714         unsigned char cval;
2715         int ret = 0;
2716         unsigned long flags;
2717
2718         if (!info->tty || !info->tty->termios)
2719                 return ret;
2720
2721         if (!(info->base))
2722                 return ret;
2723
2724         if (newspd > info->MaxCanSetBaudRate)
2725                 return 0;
2726
2727         info->realbaud = newspd;
2728         if (newspd == 134) {
2729                 quot = (2 * info->baud_base / 269);
2730         } else if (newspd) {
2731                 quot = info->baud_base / newspd;
2732
2733                 if (quot == 0)
2734                         quot = 1;
2735
2736         } else {
2737                 quot = 0;
2738         }
2739
2740         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2741         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2742
2743         if (quot) {
2744                 spin_lock_irqsave(&info->slock, flags);
2745                 info->MCR |= UART_MCR_DTR;
2746                 outb(info->MCR, info->base + UART_MCR);
2747                 spin_unlock_irqrestore(&info->slock, flags);
2748         } else {
2749                 spin_lock_irqsave(&info->slock, flags);
2750                 info->MCR &= ~UART_MCR_DTR;
2751                 outb(info->MCR, info->base + UART_MCR);
2752                 spin_unlock_irqrestore(&info->slock, flags);
2753                 return ret;
2754         }
2755
2756         cval = inb(info->base + UART_LCR);
2757
2758         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2759
2760         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2761         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2762         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2763
2764
2765         return ret;
2766 }
2767
2768
2769
2770 /*
2771  * ------------------------------------------------------------
2772  * friends of mxser_ioctl()
2773  * ------------------------------------------------------------
2774  */
2775 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2776 {
2777         struct serial_struct tmp;
2778
2779         if (!retinfo)
2780                 return (-EFAULT);
2781         memset(&tmp, 0, sizeof(tmp));
2782         tmp.type = info->type;
2783         tmp.line = info->port;
2784         tmp.port = info->base;
2785         tmp.irq = info->irq;
2786         tmp.flags = info->flags;
2787         tmp.baud_base = info->baud_base;
2788         tmp.close_delay = info->close_delay;
2789         tmp.closing_wait = info->closing_wait;
2790         tmp.custom_divisor = info->custom_divisor;
2791         tmp.hub6 = 0;
2792         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2793                 return -EFAULT;
2794         return (0);
2795 }
2796
2797 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2798 {
2799         struct serial_struct new_serial;
2800         unsigned int flags;
2801         int retval = 0;
2802
2803         if (!new_info || !info->base)
2804                 return (-EFAULT);
2805         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2806                 return -EFAULT;
2807
2808         if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
2809                 return (-EPERM);
2810
2811         flags = info->flags & ASYNC_SPD_MASK;
2812
2813         if (!capable(CAP_SYS_ADMIN)) {
2814                 if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2815                         return (-EPERM);
2816                 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2817         } else {
2818                 /*
2819                  * OK, past this point, all the error checking has been done.
2820                  * At this point, we start making changes.....
2821                  */
2822                 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2823                 info->close_delay = new_serial.close_delay * HZ / 100;
2824                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2825                 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2826                 info->tty->low_latency = 0;     //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2827         }
2828
2829         /* added by casper, 3/17/2000, for mouse */
2830         info->type = new_serial.type;
2831
2832         process_txrx_fifo(info);
2833
2834         /* */
2835         if (info->flags & ASYNC_INITIALIZED) {
2836                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2837                         mxser_change_speed(info, NULL);
2838                 }
2839         } else {
2840                 retval = mxser_startup(info);
2841         }
2842         return (retval);
2843 }
2844
2845 /*
2846  * mxser_get_lsr_info - get line status register info
2847  *
2848  * Purpose: Let user call ioctl() to get info when the UART physically
2849  *          is emptied.  On bus types like RS485, the transmitter must
2850  *          release the bus after transmitting. This must be done when
2851  *          the transmit shift register is empty, not be done when the
2852  *          transmit holding register is empty.  This functionality
2853  *          allows an RS485 driver to be written in user space.
2854  */
2855 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2856 {
2857         unsigned char status;
2858         unsigned int result;
2859         unsigned long flags;
2860
2861         spin_lock_irqsave(&info->slock, flags);
2862         status = inb(info->base + UART_LSR);
2863         spin_unlock_irqrestore(&info->slock, flags);
2864         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2865         return put_user(result, value);
2866 }
2867
2868 /*
2869  * This routine sends a break character out the serial port.
2870  */
2871 static void mxser_send_break(struct mxser_struct *info, int duration)
2872 {
2873         unsigned long flags;
2874
2875         if (!info->base)
2876                 return;
2877         set_current_state(TASK_INTERRUPTIBLE);
2878         spin_lock_irqsave(&info->slock, flags);
2879         outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2880         spin_unlock_irqrestore(&info->slock, flags);
2881         schedule_timeout(duration);
2882         spin_lock_irqsave(&info->slock, flags);
2883         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2884         spin_unlock_irqrestore(&info->slock, flags);
2885 }
2886
2887 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2888 {
2889         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2890         unsigned char control, status;
2891         unsigned long flags;
2892
2893
2894         if (tty->index == MXSER_PORTS)
2895                 return (-ENOIOCTLCMD);
2896         if (tty->flags & (1 << TTY_IO_ERROR))
2897                 return (-EIO);
2898
2899         control = info->MCR;
2900
2901         spin_lock_irqsave(&info->slock, flags);
2902         status = inb(info->base + UART_MSR);
2903         if (status & UART_MSR_ANY_DELTA)
2904                 mxser_check_modem_status(info, status);
2905         spin_unlock_irqrestore(&info->slock, flags);
2906         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2907             ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2908 }
2909
2910 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2911 {
2912         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2913         unsigned long flags;
2914
2915
2916         if (tty->index == MXSER_PORTS)
2917                 return -ENOIOCTLCMD;
2918         if (tty->flags & (1 << TTY_IO_ERROR))
2919                 return -EIO;
2920
2921         spin_lock_irqsave(&info->slock, flags);
2922
2923         if (set & TIOCM_RTS)
2924                 info->MCR |= UART_MCR_RTS;
2925         if (set & TIOCM_DTR)
2926                 info->MCR |= UART_MCR_DTR;
2927
2928         if (clear & TIOCM_RTS)
2929                 info->MCR &= ~UART_MCR_RTS;
2930         if (clear & TIOCM_DTR)
2931                 info->MCR &= ~UART_MCR_DTR;
2932
2933         outb(info->MCR, info->base + UART_MCR);
2934         spin_unlock_irqrestore(&info->slock, flags);
2935         return 0;
2936 }
2937
2938
2939 static int mxser_read_register(int, unsigned short *);
2940 static int mxser_program_mode(int);
2941 static void mxser_normal_mode(int);
2942
2943 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2944 {
2945         int id, i, bits;
2946         unsigned short regs[16], irq;
2947         unsigned char scratch, scratch2;
2948
2949         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2950
2951         id = mxser_read_register(cap, regs);
2952         if (id == C168_ASIC_ID) {
2953                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2954                 hwconf->ports = 8;
2955         } else if (id == C104_ASIC_ID) {
2956                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2957                 hwconf->ports = 4;
2958         } else if (id == C102_ASIC_ID) {
2959                 hwconf->board_type = MXSER_BOARD_C102_ISA;
2960                 hwconf->ports = 2;
2961         } else if (id == CI132_ASIC_ID) {
2962                 hwconf->board_type = MXSER_BOARD_CI132;
2963                 hwconf->ports = 2;
2964         } else if (id == CI134_ASIC_ID) {
2965                 hwconf->board_type = MXSER_BOARD_CI134;
2966                 hwconf->ports = 4;
2967         } else if (id == CI104J_ASIC_ID) {
2968                 hwconf->board_type = MXSER_BOARD_CI104J;
2969                 hwconf->ports = 4;
2970         } else
2971                 return (0);
2972
2973         irq = 0;
2974         if (hwconf->ports == 2) {
2975                 irq = regs[9] & 0xF000;
2976                 irq = irq | (irq >> 4);
2977                 if (irq != (regs[9] & 0xFF00))
2978                         return (MXSER_ERR_IRQ_CONFLIT);
2979         } else if (hwconf->ports == 4) {
2980                 irq = regs[9] & 0xF000;
2981                 irq = irq | (irq >> 4);
2982                 irq = irq | (irq >> 8);
2983                 if (irq != regs[9])
2984                         return (MXSER_ERR_IRQ_CONFLIT);
2985         } else if (hwconf->ports == 8) {
2986                 irq = regs[9] & 0xF000;
2987                 irq = irq | (irq >> 4);
2988                 irq = irq | (irq >> 8);
2989                 if ((irq != regs[9]) || (irq != regs[10]))
2990                         return (MXSER_ERR_IRQ_CONFLIT);
2991         }
2992
2993         if (!irq) {
2994                 return (MXSER_ERR_IRQ);
2995         }
2996         hwconf->irq = ((int) (irq & 0xF000) >> 12);
2997         for (i = 0; i < 8; i++)
2998                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
2999         if ((regs[12] & 0x80) == 0) {
3000                 return (MXSER_ERR_VECTOR);
3001         }
3002         hwconf->vector = (int) regs[11];        /* interrupt vector */
3003         if (id == 1)
3004                 hwconf->vector_mask = 0x00FF;
3005         else
3006                 hwconf->vector_mask = 0x000F;
3007         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3008                 if (regs[12] & bits) {
3009                         hwconf->baud_base[i] = 921600;
3010                         hwconf->MaxCanSetBaudRate[i] = 921600;  // add by Victor Yu. 09-04-2002
3011                 } else {
3012                         hwconf->baud_base[i] = 115200;
3013                         hwconf->MaxCanSetBaudRate[i] = 115200;  // add by Victor Yu. 09-04-2002
3014                 }
3015         }
3016         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3017         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3018         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3019         outb(scratch2, cap + UART_LCR);
3020         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3021         scratch = inb(cap + UART_IIR);
3022
3023         if (scratch & 0xC0)
3024                 hwconf->uart_type = PORT_16550A;
3025         else
3026                 hwconf->uart_type = PORT_16450;
3027         if (id == 1)
3028                 hwconf->ports = 8;
3029         else
3030                 hwconf->ports = 4;
3031         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3032         request_region(hwconf->vector, 1, "mxser(vector)");
3033         return (hwconf->ports);
3034 }
3035
3036 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3037 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3038 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3039 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3040 #define EN_CCMD         0x000   /* Chip's command register     */
3041 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3042 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3043 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3044 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3045 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3046 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3047 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3048 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3049 static int mxser_read_register(int port, unsigned short *regs)
3050 {
3051         int i, k, value, id;
3052         unsigned int j;
3053
3054         id = mxser_program_mode(port);
3055         if (id < 0)
3056                 return (id);
3057         for (i = 0; i < 14; i++) {
3058                 k = (i & 0x3F) | 0x180;
3059                 for (j = 0x100; j > 0; j >>= 1) {
3060                         outb(CHIP_CS, port);
3061                         if (k & j) {
3062                                 outb(CHIP_CS | CHIP_DO, port);
3063                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3064                         } else {
3065                                 outb(CHIP_CS, port);
3066                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3067                         }
3068                 }
3069                 (void) inb(port);
3070                 value = 0;
3071                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3072                         outb(CHIP_CS, port);
3073                         outb(CHIP_CS | CHIP_SK, port);
3074                         if (inb(port) & CHIP_DI)
3075                                 value |= j;
3076                 }
3077                 regs[i] = value;
3078                 outb(0, port);
3079         }
3080         mxser_normal_mode(port);
3081         return (id);
3082 }
3083
3084 static int mxser_program_mode(int port)
3085 {
3086         int id, i, j, n;
3087         //unsigned long flags;
3088
3089         spin_lock(&gm_lock);
3090         outb(0, port);
3091         outb(0, port);
3092         outb(0, port);
3093         (void) inb(port);
3094         (void) inb(port);
3095         outb(0, port);
3096         (void) inb(port);
3097         //restore_flags(flags);
3098         spin_unlock(&gm_lock);
3099
3100         id = inb(port + 1) & 0x1F;
3101         if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID))
3102                 return (-1);
3103         for (i = 0, j = 0; i < 4; i++) {
3104                 n = inb(port + 2);
3105                 if (n == 'M') {
3106                         j = 1;
3107                 } else if ((j == 1) && (n == 1)) {
3108                         j = 2;
3109                         break;
3110                 } else
3111                         j = 0;
3112         }
3113         if (j != 2)
3114                 id = -2;
3115         return (id);
3116 }
3117
3118 static void mxser_normal_mode(int port)
3119 {
3120         int i, n;
3121
3122         outb(0xA5, port + 1);
3123         outb(0x80, port + 3);
3124         outb(12, port + 0);     /* 9600 bps */
3125         outb(0, port + 1);
3126         outb(0x03, port + 3);   /* 8 data bits */
3127         outb(0x13, port + 4);   /* loop back mode */
3128         for (i = 0; i < 16; i++) {
3129                 n = inb(port + 5);
3130                 if ((n & 0x61) == 0x60)
3131                         break;
3132                 if ((n & 1) == 1)
3133                         (void) inb(port);
3134         }
3135         outb(0x00, port + 4);
3136 }
3137
3138 module_init(mxser_module_init);
3139 module_exit(mxser_module_exit);