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/module.h>
  40 #include <linux/autoconf.h>
  41 #include <linux/errno.h>
  42 #include <linux/signal.h>
  43 #include <linux/sched.h>
  44 #include <linux/timer.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/tty.h>
  47 #include <linux/tty_flip.h>
  48 #include <linux/serial.h>
  49 #include <linux/serial_reg.h>
  50 #include <linux/major.h>
  51 #include <linux/string.h>
  52 #include <linux/fcntl.h>
  53 #include <linux/ptrace.h>
  54 #include <linux/gfp.h>
  55 #include <linux/ioport.h>
  56 #include <linux/mm.h>
  57 #include <linux/delay.h>
  58 #include <linux/pci.h>
  59
  60 #include <asm/system.h>
  61 #include <asm/io.h>
  62 #include <asm/irq.h>
  63 #include <asm/bitops.h>
  64 #include <asm/uaccess.h>
  65
  66 #include "mxser.h"
  67
  68 #define MXSER_VERSION   "1.8"
  69 #define MXSERMAJOR       174
  70 #define MXSERCUMAJOR     175
  71
  72 #define MXSER_EVENT_TXLOW       1
  73 #define MXSER_EVENT_HANGUP      2
  74
  75 #define MXSER_BOARDS            4       /* Max. boards */
  76 #define MXSER_PORTS             32      /* Max. ports */
  77 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  78 #define MXSER_ISR_PASS_LIMIT    256
  79
  80 #define MXSER_ERR_IOADDR        -1
  81 #define MXSER_ERR_IRQ           -2
  82 #define MXSER_ERR_IRQ_CONFLIT   -3
  83 #define MXSER_ERR_VECTOR        -4
  84
  85 #define SERIAL_TYPE_NORMAL      1
  86 #define SERIAL_TYPE_CALLOUT     2
  87
  88 #define WAKEUP_CHARS            256
  89
  90 #define UART_MCR_AFE            0x20
  91 #define UART_LSR_SPECIAL        0x1E
  92
  93 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  94                                           IXON|IXOFF))
  95
  96 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
  97
  98 #define C168_ASIC_ID    1
  99 #define C104_ASIC_ID    2
 100 #define C102_ASIC_ID    0xB
 101 #define CI132_ASIC_ID   4
 102 #define CI134_ASIC_ID   3
 103 #define CI104J_ASIC_ID  5
 104
 105 enum {
 106         MXSER_BOARD_C168_ISA = 1,
 107         MXSER_BOARD_C104_ISA,
 108         MXSER_BOARD_CI104J,
 109         MXSER_BOARD_C168_PCI,
 110         MXSER_BOARD_C104_PCI,
 111         MXSER_BOARD_C102_ISA,
 112         MXSER_BOARD_CI132,
 113         MXSER_BOARD_CI134,
 114         MXSER_BOARD_CP132,
 115         MXSER_BOARD_CP114,
 116         MXSER_BOARD_CT114,
 117         MXSER_BOARD_CP102,
 118         MXSER_BOARD_CP104U,
 119         MXSER_BOARD_CP168U,
 120         MXSER_BOARD_CP132U,
 121         MXSER_BOARD_CP134U,
 122         MXSER_BOARD_CP104JU,
 123         MXSER_BOARD_RC7000,
 124         MXSER_BOARD_CP118U,
 125         MXSER_BOARD_CP102UL,
 126         MXSER_BOARD_CP102U,
 127 };
 128
 129 static char *mxser_brdname[] = {
 130         "C168 series",
 131         "C104 series",
 132         "CI-104J series",
 133         "C168H/PCI series",
 134         "C104H/PCI series",
 135         "C102 series",
 136         "CI-132 series",
 137         "CI-134 series",
 138         "CP-132 series",
 139         "CP-114 series",
 140         "CT-114 series",
 141         "CP-102 series",
 142         "CP-104U series",
 143         "CP-168U series",
 144         "CP-132U series",
 145         "CP-134U series",
 146         "CP-104JU series",
 147         "Moxa UC7000 Serial",
 148         "CP-118U series",
 149         "CP-102UL series",
 150         "CP-102U series",
 151 };
 152
 153 static int mxser_numports[] = {
 154         8,                      /* C168-ISA */
 155         4,                      /* C104-ISA */
 156         4,                      /* CI104J */
 157         8,                      /* C168-PCI */
 158         4,                      /* C104-PCI */
 159         2,                      /* C102-ISA */
 160         2,                      /* CI132 */
 161         4,                      /* CI134 */
 162         2,                      /* CP132 */
 163         4,                      /* CP114 */
 164         4,                      /* CT114 */
 165         2,                      /* CP102 */
 166         4,                      /* CP104U */
 167         8,                      /* CP168U */
 168         2,                      /* CP132U */
 169         4,                      /* CP134U */
 170         4,                      /* CP104JU */
 171         8,                      /* RC7000 */
 172         8,                      /* CP118U */
 173         2,                      /* CP102UL */
 174         2,                      /* CP102U */
 175 };
 176
 177 #define UART_TYPE_NUM   2
 178
 179 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 180         MOXA_MUST_MU150_HWID,
 181         MOXA_MUST_MU860_HWID
 182 };
 183
 184 /* This is only for PCI */
 185 #define UART_INFO_NUM   3
 186 struct mxpciuart_info {
 187         int type;
 188         int tx_fifo;
 189         int rx_fifo;
 190         int xmit_fifo_size;
 191         int rx_high_water;
 192         int rx_trigger;
 193         int rx_low_water;
 194         long max_baud;
 195 };
 196
 197 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 198         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 199         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 200         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 201 };
 202
 203
 204 #ifdef CONFIG_PCI
 205
 206 static struct pci_device_id mxser_pcibrds[] = {
 207         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 208         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 222         {0}
 223 };
 224
 225 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 226
 227
 228 #endif
 229
 230 typedef struct _moxa_pci_info {
 231         unsigned short busNum;
 232         unsigned short devNum;
 233         struct pci_dev *pdev;   /* add by Victor Yu. 06-23-2003 */
 234 } moxa_pci_info;
 235
 236 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 237 static int ttymajor = MXSERMAJOR;
 238 static int calloutmajor = MXSERCUMAJOR;
 239 static int verbose = 0;
 240
 241 /* Variables for insmod */
 242
 243 MODULE_AUTHOR("Casper Yang");
 244 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 245 module_param_array(ioaddr, int, NULL, 0);
 246 module_param(ttymajor, int, 0);
 247 module_param(calloutmajor, int, 0);
 248 module_param(verbose, bool, 0);
 249 MODULE_LICENSE("GPL");
 250
 251 struct mxser_log {
 252         int tick;
 253         unsigned long rxcnt[MXSER_PORTS];
 254         unsigned long txcnt[MXSER_PORTS];
 255 };
 256
 257
 258 struct mxser_mon {
 259         unsigned long rxcnt;
 260         unsigned long txcnt;
 261         unsigned long up_rxcnt;
 262         unsigned long up_txcnt;
 263         int modem_status;
 264         unsigned char hold_reason;
 265 };
 266
 267 struct mxser_mon_ext {
 268         unsigned long rx_cnt[32];
 269         unsigned long tx_cnt[32];
 270         unsigned long up_rxcnt[32];
 271         unsigned long up_txcnt[32];
 272         int modem_status[32];
 273
 274         long baudrate[32];
 275         int databits[32];
 276         int stopbits[32];
 277         int parity[32];
 278         int flowctrl[32];
 279         int fifo[32];
 280         int iftype[32];
 281 };
 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         unsigned char *xmit_buf;
 324         int xmit_head;
 325         int xmit_tail;
 326         int xmit_cnt;
 327         struct work_struct tqueue;
 328         struct ktermios normal_termios;
 329         struct ktermios callout_termios;
 330         wait_queue_head_t open_wait;
 331         wait_queue_head_t close_wait;
 332         wait_queue_head_t delta_msr_wait;
 333         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 334         int timeout;
 335         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 336         int MaxCanSetBaudRate;  /* add by Victor Yu. 09-04-2002 */
 337         int opmode_ioaddr;      /* add by Victor Yu. 01-05-2004 */
 338         unsigned char stop_rx;
 339         unsigned char ldisc_stop_rx;
 340         long realbaud;
 341         struct mxser_mon mon_data;
 342         unsigned char err_shadow;
 343         spinlock_t slock;
 344 };
 345
 346 struct mxser_mstatus {
 347         tcflag_t cflag;
 348         int cts;
 349         int dsr;
 350         int ri;
 351         int dcd;
 352 };
 353
 354 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 355
 356 static int mxserBoardCAP[MXSER_BOARDS] = {
 357         0, 0, 0, 0
 358         /*  0x180, 0x280, 0x200, 0x320 */
 359 };
 360
 361 static struct tty_driver *mxvar_sdriver;
 362 static struct mxser_struct mxvar_table[MXSER_PORTS];
 363 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 364 static struct ktermios *mxvar_termios[MXSER_PORTS + 1];
 365 static struct ktermios *mxvar_termios_locked[MXSER_PORTS + 1];
 366 static struct mxser_log mxvar_log;
 367 static int mxvar_diagflag;
 368 static unsigned char mxser_msr[MXSER_PORTS + 1];
 369 static struct mxser_mon_ext mon_data_ext;
 370 static int mxser_set_baud_method[MXSER_PORTS + 1];
 371 static spinlock_t gm_lock;
 372
 373 /*
 374  * This is used to figure out the divisor speeds and the timeouts
 375  */
 376
 377 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 378
 379 /*
 380  * static functions:
 381  */
 382
 383 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 384 static int mxser_init(void);
 385
 386 /* static void   mxser_poll(unsigned long); */
 387 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 388 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 389 static void mxser_do_softint(struct work_struct *);
 390 static int mxser_open(struct tty_struct *, struct file *);
 391 static void mxser_close(struct tty_struct *, struct file *);
 392 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 393 static int mxser_write_room(struct tty_struct *);
 394 static void mxser_flush_buffer(struct tty_struct *);
 395 static int mxser_chars_in_buffer(struct tty_struct *);
 396 static void mxser_flush_chars(struct tty_struct *);
 397 static void mxser_put_char(struct tty_struct *, unsigned char);
 398 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 399 static int mxser_ioctl_special(unsigned int, void __user *);
 400 static void mxser_throttle(struct tty_struct *);
 401 static void mxser_unthrottle(struct tty_struct *);
 402 static void mxser_set_termios(struct tty_struct *, struct ktermios *);
 403 static void mxser_stop(struct tty_struct *);
 404 static void mxser_start(struct tty_struct *);
 405 static void mxser_hangup(struct tty_struct *);
 406 static void mxser_rs_break(struct tty_struct *, int);
 407 static irqreturn_t mxser_interrupt(int, void *);
 408 static void mxser_receive_chars(struct mxser_struct *, int *);
 409 static void mxser_transmit_chars(struct mxser_struct *);
 410 static void mxser_check_modem_status(struct mxser_struct *, int);
 411 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 412 static int mxser_startup(struct mxser_struct *);
 413 static void mxser_shutdown(struct mxser_struct *);
 414 static int mxser_change_speed(struct mxser_struct *, struct ktermios *old_termios);
 415 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 416 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 417 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 418 static void mxser_send_break(struct mxser_struct *, int);
 419 static int mxser_tiocmget(struct tty_struct *, struct file *);
 420 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 421 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 422 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 423
 424 static void mxser_startrx(struct tty_struct *tty);
 425 static void mxser_stoprx(struct tty_struct *tty);
 426
 427
 428 static int CheckIsMoxaMust(int io)
 429 {
 430         u8 oldmcr, hwid;
 431         int i;
 432
 433         outb(0, io + UART_LCR);
 434         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 435         oldmcr = inb(io + UART_MCR);
 436         outb(0, io + UART_MCR);
 437         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 438         if ((hwid = inb(io + UART_MCR)) != 0) {
 439                 outb(oldmcr, io + UART_MCR);
 440                 return MOXA_OTHER_UART;
 441         }
 442
 443         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 444         for (i = 0; i < UART_TYPE_NUM; i++) {
 445                 if (hwid == Gmoxa_uart_id[i])
 446                         return (int)hwid;
 447         }
 448         return MOXA_OTHER_UART;
 449 }
 450
 451 /* above is modified by Victor Yu. 08-15-2002 */
 452
 453 static const struct tty_operations mxser_ops = {
 454         .open = mxser_open,
 455         .close = mxser_close,
 456         .write = mxser_write,
 457         .put_char = mxser_put_char,
 458         .flush_chars = mxser_flush_chars,
 459         .write_room = mxser_write_room,
 460         .chars_in_buffer = mxser_chars_in_buffer,
 461         .flush_buffer = mxser_flush_buffer,
 462         .ioctl = mxser_ioctl,
 463         .throttle = mxser_throttle,
 464         .unthrottle = mxser_unthrottle,
 465         .set_termios = mxser_set_termios,
 466         .stop = mxser_stop,
 467         .start = mxser_start,
 468         .hangup = mxser_hangup,
 469         .break_ctl = mxser_rs_break,
 470         .wait_until_sent = mxser_wait_until_sent,
 471         .tiocmget = mxser_tiocmget,
 472         .tiocmset = mxser_tiocmset,
 473 };
 474
 475 /*
 476  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 477  */
 478
 479 static int __init mxser_module_init(void)
 480 {
 481         int ret;
 482
 483         if (verbose)
 484                 printk(KERN_DEBUG "Loading module mxser ...\n");
 485         ret = mxser_init();
 486         if (verbose)
 487                 printk(KERN_DEBUG "Done.\n");
 488         return ret;
 489 }
 490
 491 static void __exit mxser_module_exit(void)
 492 {
 493         int i, err;
 494
 495         if (verbose)
 496                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 497
 498         err = tty_unregister_driver(mxvar_sdriver);
 499         if (!err)
 500                 put_tty_driver(mxvar_sdriver);
 501         else
 502                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 503
 504         for (i = 0; i < MXSER_BOARDS; i++) {
 505                 struct pci_dev *pdev;
 506
 507                 if (mxsercfg[i].board_type == -1)
 508                         continue;
 509                 else {
 510                         pdev = mxsercfg[i].pciInfo.pdev;
 511                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 512                         if (pdev != NULL) {     /* PCI */
 513                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 514                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 515                                 pci_dev_put(pdev);
 516                         } else {
 517                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 518                                 release_region(mxsercfg[i].vector, 1);
 519                         }
 520                 }
 521         }
 522         if (verbose)
 523                 printk(KERN_DEBUG "Done.\n");
 524 }
 525
 526 static void process_txrx_fifo(struct mxser_struct *info)
 527 {
 528         int i;
 529
 530         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 531                 info->rx_trigger = 1;
 532                 info->rx_high_water = 1;
 533                 info->rx_low_water = 1;
 534                 info->xmit_fifo_size = 1;
 535         } else {
 536                 for (i = 0; i < UART_INFO_NUM; i++) {
 537                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 538                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 539                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 540                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 541                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 542                                 break;
 543                         }
 544                 }
 545         }
 546 }
 547
 548 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 549 {
 550         struct mxser_struct *info;
 551         int retval;
 552         int i, n;
 553
 554         n = board * MXSER_PORTS_PER_BOARD;
 555         info = &mxvar_table[n];
 556         /*if (verbose) */  {
 557                 printk(KERN_DEBUG "        ttyMI%d - ttyMI%d ",
 558                         n, n + hwconf->ports - 1);
 559                 printk(" max. baud rate = %d bps.\n",
 560                         hwconf->MaxCanSetBaudRate[0]);
 561         }
 562
 563         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 564                 info->port = n;
 565                 info->base = hwconf->ioaddr[i];
 566                 info->irq = hwconf->irq;
 567                 info->vector = hwconf->vector;
 568                 info->vectormask = hwconf->vector_mask;
 569                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
 570                 info->stop_rx = 0;
 571                 info->ldisc_stop_rx = 0;
 572
 573                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 574                 /* Enhance mode enabled here */
 575                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 576                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 577                 }
 578
 579                 info->flags = ASYNC_SHARE_IRQ;
 580                 info->type = hwconf->uart_type;
 581                 info->baud_base = hwconf->baud_base[i];
 582
 583                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 584
 585                 process_txrx_fifo(info);
 586
 587
 588                 info->custom_divisor = hwconf->baud_base[i] * 16;
 589                 info->close_delay = 5 * HZ / 10;
 590                 info->closing_wait = 30 * HZ;
 591                 INIT_WORK(&info->tqueue, mxser_do_softint);
 592                 info->normal_termios = mxvar_sdriver->init_termios;
 593                 init_waitqueue_head(&info->open_wait);
 594                 init_waitqueue_head(&info->close_wait);
 595                 init_waitqueue_head(&info->delta_msr_wait);
 596                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 597                 info->err_shadow = 0;
 598                 spin_lock_init(&info->slock);
 599         }
 600         /*
 601          * Allocate the IRQ if necessary
 602          */
 603
 604
 605         /* before set INT ISR, disable all int */
 606         for (i = 0; i < hwconf->ports; i++) {
 607                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
 608                         hwconf->ioaddr[i] + UART_IER);
 609         }
 610
 611         n = board * MXSER_PORTS_PER_BOARD;
 612         info = &mxvar_table[n];
 613
 614         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
 615                                 "mxser", info);
 616         if (retval) {
 617                 printk(KERN_ERR "Board %d: %s",
 618                         board, mxser_brdname[hwconf->board_type - 1]);
 619                 printk("  Request irq failed, IRQ (%d) may conflict with"
 620                         " another device.\n", info->irq);
 621                 return retval;
 622         }
 623         return 0;
 624 }
 625
 626 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 627 {
 628         mxsercfg[board] = *hwconf;
 629 }
 630
 631 #ifdef CONFIG_PCI
 632 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 633 {
 634         int i, j;
 635         /* unsigned int val; */
 636         unsigned int ioaddress;
 637         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 638
 639         /* io address */
 640         hwconf->board_type = board_type;
 641         hwconf->ports = mxser_numports[board_type - 1];
 642         ioaddress = pci_resource_start(pdev, 2);
 643         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
 644                         "mxser(IO)");
 645
 646         for (i = 0; i < hwconf->ports; i++)
 647                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 648
 649         /* vector */
 650         ioaddress = pci_resource_start(pdev, 3);
 651         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
 652                         "mxser(vector)");
 653         hwconf->vector = ioaddress;
 654
 655         /* irq */
 656         hwconf->irq = hwconf->pciInfo.pdev->irq;
 657
 658         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 659         hwconf->uart_type = PORT_16550A;
 660         hwconf->vector_mask = 0;
 661
 662
 663         for (i = 0; i < hwconf->ports; i++) {
 664                 for (j = 0; j < UART_INFO_NUM; j++) {
 665                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 666                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 667
 668                                 /* exception....CP-102 */
 669                                 if (board_type == MXSER_BOARD_CP102)
 670                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 671                                 break;
 672                         }
 673                 }
 674         }
 675
 676         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 677                 for (i = 0; i < hwconf->ports; i++) {
 678                         if (i < 4)
 679                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 680                         else
 681                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 682                 }
 683                 outb(0, ioaddress + 4); /* default set to RS232 mode */
 684                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
 685         }
 686
 687         for (i = 0; i < hwconf->ports; i++) {
 688                 hwconf->vector_mask |= (1 << i);
 689                 hwconf->baud_base[i] = 921600;
 690         }
 691         return 0;
 692 }
 693 #endif
 694
 695 static int mxser_init(void)
 696 {
 697         int i, m, retval, b, n;
 698         struct pci_dev *pdev = NULL;
 699         int index;
 700         unsigned char busnum, devnum;
 701         struct mxser_hwconf hwconf;
 702
 703         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 704         if (!mxvar_sdriver)
 705                 return -ENOMEM;
 706         spin_lock_init(&gm_lock);
 707
 708         for (i = 0; i < MXSER_BOARDS; i++) {
 709                 mxsercfg[i].board_type = -1;
 710         }
 711
 712         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
 713                 MXSER_VERSION);
 714
 715         /* Initialize the tty_driver structure */
 716         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 717         mxvar_sdriver->owner = THIS_MODULE;
 718         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 719         mxvar_sdriver->name = "ttyMI";
 720         mxvar_sdriver->major = ttymajor;
 721         mxvar_sdriver->minor_start = 0;
 722         mxvar_sdriver->num = MXSER_PORTS + 1;
 723         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 724         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 725         mxvar_sdriver->init_termios = tty_std_termios;
 726         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 727         mxvar_sdriver->init_termios.c_ispeed = 9600;
 728         mxvar_sdriver->init_termios.c_ospeed = 9600;
 729         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 730         tty_set_operations(mxvar_sdriver, &mxser_ops);
 731         mxvar_sdriver->ttys = mxvar_tty;
 732         mxvar_sdriver->termios = mxvar_termios;
 733         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 734
 735         mxvar_diagflag = 0;
 736         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 737         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 738
 739         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 740         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 741         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 742         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 743
 744         m = 0;
 745         /* Start finding ISA boards here */
 746         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 747                 int cap;
 748
 749                 if (!(cap = mxserBoardCAP[b]))
 750                         continue;
 751
 752                 retval = mxser_get_ISA_conf(cap, &hwconf);
 753
 754                 if (retval != 0)
 755                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 756                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 757
 758                 if (retval <= 0) {
 759                         if (retval == MXSER_ERR_IRQ)
 760                                 printk(KERN_ERR "Invalid interrupt number, "
 761                                         "board not configured\n");
 762                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 763                                 printk(KERN_ERR "Invalid interrupt number, "
 764                                         "board not configured\n");
 765                         else if (retval == MXSER_ERR_VECTOR)
 766                                 printk(KERN_ERR "Invalid interrupt vector, "
 767                                         "board not configured\n");
 768                         else if (retval == MXSER_ERR_IOADDR)
 769                                 printk(KERN_ERR "Invalid I/O address, "
 770                                         "board not configured\n");
 771
 772                         continue;
 773                 }
 774
 775                 hwconf.pciInfo.busNum = 0;
 776                 hwconf.pciInfo.devNum = 0;
 777                 hwconf.pciInfo.pdev = NULL;
 778
 779                 mxser_getcfg(m, &hwconf);
 780                 /*
 781                  * init mxsercfg first,
 782                  * or mxsercfg data is not correct on ISR.
 783                  */
 784                 /* mxser_initbrd will hook ISR. */
 785                 if (mxser_initbrd(m, &hwconf) < 0)
 786                         continue;
 787
 788                 m++;
 789         }
 790
 791         /* Start finding ISA boards from module arg */
 792         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 793                 int cap;
 794
 795                 if (!(cap = ioaddr[b]))
 796                         continue;
 797
 798                 retval = mxser_get_ISA_conf(cap, &hwconf);
 799
 800                 if (retval != 0)
 801                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 802                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 803
 804                 if (retval <= 0) {
 805                         if (retval == MXSER_ERR_IRQ)
 806                                 printk(KERN_ERR "Invalid interrupt number, "
 807                                         "board not configured\n");
 808                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 809                                 printk(KERN_ERR "Invalid interrupt number, "
 810                                         "board not configured\n");
 811                         else if (retval == MXSER_ERR_VECTOR)
 812                                 printk(KERN_ERR "Invalid interrupt vector, "
 813                                         "board not configured\n");
 814                         else if (retval == MXSER_ERR_IOADDR)
 815                                 printk(KERN_ERR "Invalid I/O address, "
 816                                         "board not configured\n");
 817
 818                         continue;
 819                 }
 820
 821                 hwconf.pciInfo.busNum = 0;
 822                 hwconf.pciInfo.devNum = 0;
 823                 hwconf.pciInfo.pdev = NULL;
 824
 825                 mxser_getcfg(m, &hwconf);
 826                 /*
 827                  * init mxsercfg first,
 828                  * or mxsercfg data is not correct on ISR.
 829                  */
 830                 /* mxser_initbrd will hook ISR. */
 831                 if (mxser_initbrd(m, &hwconf) < 0)
 832                         continue;
 833
 834                 m++;
 835         }
 836
 837         /* start finding PCI board here */
 838 #ifdef CONFIG_PCI
 839         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 840         index = 0;
 841         b = 0;
 842         while (b < n) {
 843                 pdev = pci_get_device(mxser_pcibrds[b].vendor,
 844                                 mxser_pcibrds[b].device, pdev);
 845                 if (pdev == NULL) {
 846                         b++;
 847                         continue;
 848                 }
 849                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 850                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 851                 hwconf.pciInfo.pdev = pdev;
 852                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
 853                         mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
 854                         busnum, devnum >> 3);
 855                 index++;
 856                 if (m >= MXSER_BOARDS)
 857                         printk(KERN_ERR
 858                                 "Too many Smartio/Industio family boards find "
 859                                 "(maximum %d), board not configured\n",
 860                                 MXSER_BOARDS);
 861                 else {
 862                         if (pci_enable_device(pdev)) {
 863                                 printk(KERN_ERR "Moxa SmartI/O PCI enable "
 864                                         "fail !\n");
 865                                 continue;
 866                         }
 867                         retval = mxser_get_PCI_conf(busnum, devnum,
 868                                         (int)mxser_pcibrds[b].driver_data,
 869                                         &hwconf);
 870                         if (retval < 0) {
 871                                 if (retval == MXSER_ERR_IRQ)
 872                                         printk(KERN_ERR
 873                                                 "Invalid interrupt number, "
 874                                                 "board not configured\n");
 875                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 876                                         printk(KERN_ERR
 877                                                 "Invalid interrupt number, "
 878                                                 "board not configured\n");
 879                                 else if (retval == MXSER_ERR_VECTOR)
 880                                         printk(KERN_ERR
 881                                                 "Invalid interrupt vector, "
 882                                                 "board not configured\n");
 883                                 else if (retval == MXSER_ERR_IOADDR)
 884                                         printk(KERN_ERR
 885                                                 "Invalid I/O address, "
 886                                                 "board not configured\n");
 887                                 continue;
 888                         }
 889                         mxser_getcfg(m, &hwconf);
 890                         /* init mxsercfg first,
 891                          * or mxsercfg data is not correct on ISR.
 892                          */
 893                         /* mxser_initbrd will hook ISR. */
 894                         if (mxser_initbrd(m, &hwconf) < 0)
 895                                 continue;
 896                         m++;
 897                         /* Keep an extra reference if we succeeded. It will
 898                            be returned at unload time */
 899                         pci_dev_get(pdev);
 900                 }
 901         }
 902 #endif
 903
 904         retval = tty_register_driver(mxvar_sdriver);
 905         if (retval) {
 906                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
 907                                 " driver !\n");
 908                 put_tty_driver(mxvar_sdriver);
 909
 910                 for (i = 0; i < MXSER_BOARDS; i++) {
 911                         if (mxsercfg[i].board_type == -1)
 912                                 continue;
 913                         else {
 914                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 915                                 /* todo: release io, vector */
 916                         }
 917                 }
 918                 return retval;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static void mxser_do_softint(struct work_struct *work)
 925 {
 926         struct mxser_struct *info =
 927                 container_of(work, struct mxser_struct, tqueue);
 928         struct tty_struct *tty;
 929
 930         tty = info->tty;
 931
 932         if (tty) {
 933                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 934                         tty_wakeup(tty);
 935                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 936                         tty_hangup(tty);
 937         }
 938 }
 939
 940 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 941 {
 942         unsigned char status = 0;
 943
 944         status = inb(baseaddr + UART_MSR);
 945
 946         mxser_msr[port] &= 0x0F;
 947         mxser_msr[port] |= status;
 948         status = mxser_msr[port];
 949         if (mode)
 950                 mxser_msr[port] = 0;
 951
 952         return status;
 953 }
 954
 955 /*
 956  * This routine is called whenever a serial port is opened.  It
 957  * enables interrupts for a serial port, linking in its async structure into
 958  * the IRQ chain.   It also performs the serial-specific
 959  * initialization for the tty structure.
 960  */
 961 static int mxser_open(struct tty_struct *tty, struct file *filp)
 962 {
 963         struct mxser_struct *info;
 964         int retval, line;
 965
 966         /* initialize driver_data in case something fails */
 967         tty->driver_data = NULL;
 968
 969         line = tty->index;
 970         if (line == MXSER_PORTS)
 971                 return 0;
 972         if (line < 0 || line > MXSER_PORTS)
 973                 return -ENODEV;
 974         info = mxvar_table + line;
 975         if (!info->base)
 976                 return -ENODEV;
 977
 978         tty->driver_data = info;
 979         info->tty = tty;
 980         /*
 981          * Start up serial port
 982          */
 983         retval = mxser_startup(info);
 984         if (retval)
 985                 return retval;
 986
 987         retval = mxser_block_til_ready(tty, filp, info);
 988         if (retval)
 989                 return retval;
 990
 991         info->count++;
 992
 993         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 994                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 995                         *tty->termios = info->normal_termios;
 996                 else
 997                         *tty->termios = info->callout_termios;
 998                 mxser_change_speed(info, NULL);
 999         }
1000
1001         /*
1002         status = mxser_get_msr(info->base, 0, info->port);
1003         mxser_check_modem_status(info, status);
1004         */
1005
1006         /* unmark here for very high baud rate (ex. 921600 bps) used */
1007         tty->low_latency = 1;
1008         return 0;
1009 }
1010
1011 /*
1012  * This routine is called when the serial port gets closed.  First, we
1013  * wait for the last remaining data to be sent.  Then, we unlink its
1014  * async structure from the interrupt chain if necessary, and we free
1015  * that IRQ if nothing is left in the chain.
1016  */
1017 static void mxser_close(struct tty_struct *tty, struct file *filp)
1018 {
1019         struct mxser_struct *info = tty->driver_data;
1020
1021         unsigned long timeout;
1022         unsigned long flags;
1023         struct tty_ldisc *ld;
1024
1025         if (tty->index == MXSER_PORTS)
1026                 return;
1027         if (!info)
1028                 return;
1029
1030         spin_lock_irqsave(&info->slock, flags);
1031
1032         if (tty_hung_up_p(filp)) {
1033                 spin_unlock_irqrestore(&info->slock, flags);
1034                 return;
1035         }
1036         if ((tty->count == 1) && (info->count != 1)) {
1037                 /*
1038                  * Uh, oh.  tty->count is 1, which means that the tty
1039                  * structure will be freed.  Info->count should always
1040                  * be one in these conditions.  If it's greater than
1041                  * one, we've got real problems, since it means the
1042                  * serial port won't be shutdown.
1043                  */
1044                 printk(KERN_ERR "mxser_close: bad serial port count; "
1045                         "tty->count is 1, info->count is %d\n", info->count);
1046                 info->count = 1;
1047         }
1048         if (--info->count < 0) {
1049                 printk(KERN_ERR "mxser_close: bad serial port count for "
1050                         "ttys%d: %d\n", info->port, info->count);
1051                 info->count = 0;
1052         }
1053         if (info->count) {
1054                 spin_unlock_irqrestore(&info->slock, flags);
1055                 return;
1056         }
1057         info->flags |= ASYNC_CLOSING;
1058         spin_unlock_irqrestore(&info->slock, flags);
1059         /*
1060          * Save the termios structure, since this port may have
1061          * separate termios for callout and dialin.
1062          */
1063         if (info->flags & ASYNC_NORMAL_ACTIVE)
1064                 info->normal_termios = *tty->termios;
1065         /*
1066          * Now we wait for the transmit buffer to clear; and we notify
1067          * the line discipline to only process XON/XOFF characters.
1068          */
1069         tty->closing = 1;
1070         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1071                 tty_wait_until_sent(tty, info->closing_wait);
1072         /*
1073          * At this point we stop accepting input.  To do this, we
1074          * disable the receive line status interrupts, and tell the
1075          * interrupt driver to stop checking the data ready bit in the
1076          * line status register.
1077          */
1078         info->IER &= ~UART_IER_RLSI;
1079         if (info->IsMoxaMustChipFlag)
1080                 info->IER &= ~MOXA_MUST_RECV_ISR;
1081 /* by William
1082         info->read_status_mask &= ~UART_LSR_DR;
1083 */
1084         if (info->flags & ASYNC_INITIALIZED) {
1085                 outb(info->IER, info->base + UART_IER);
1086                 /*
1087                  * Before we drop DTR, make sure the UART transmitter
1088                  * has completely drained; this is especially
1089                  * important if there is a transmit FIFO!
1090                  */
1091                 timeout = jiffies + HZ;
1092                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1093                         schedule_timeout_interruptible(5);
1094                         if (time_after(jiffies, timeout))
1095                                 break;
1096                 }
1097         }
1098         mxser_shutdown(info);
1099
1100         if (tty->driver->flush_buffer)
1101                 tty->driver->flush_buffer(tty);
1102
1103         ld = tty_ldisc_ref(tty);
1104         if (ld) {
1105                 if (ld->flush_buffer)
1106                         ld->flush_buffer(tty);
1107                 tty_ldisc_deref(ld);
1108         }
1109
1110         tty->closing = 0;
1111         info->event = 0;
1112         info->tty = NULL;
1113         if (info->blocked_open) {
1114                 if (info->close_delay)
1115                         schedule_timeout_interruptible(info->close_delay);
1116                 wake_up_interruptible(&info->open_wait);
1117         }
1118
1119         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1120         wake_up_interruptible(&info->close_wait);
1121
1122 }
1123
1124 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1125 {
1126         int c, total = 0;
1127         struct mxser_struct *info = tty->driver_data;
1128         unsigned long flags;
1129
1130         if (!info->xmit_buf)
1131                 return 0;
1132
1133         while (1) {
1134                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1135                                           SERIAL_XMIT_SIZE - info->xmit_head));
1136                 if (c <= 0)
1137                         break;
1138
1139                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1140                 spin_lock_irqsave(&info->slock, flags);
1141                 info->xmit_head = (info->xmit_head + c) &
1142                                   (SERIAL_XMIT_SIZE - 1);
1143                 info->xmit_cnt += c;
1144                 spin_unlock_irqrestore(&info->slock, flags);
1145
1146                 buf += c;
1147                 count -= c;
1148                 total += c;
1149         }
1150
1151         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1152                 if (!tty->hw_stopped ||
1153                                 (info->type == PORT_16550A) ||
1154                                 (info->IsMoxaMustChipFlag)) {
1155                         spin_lock_irqsave(&info->slock, flags);
1156                         info->IER |= UART_IER_THRI;
1157                         outb(info->IER, info->base + UART_IER);
1158                         spin_unlock_irqrestore(&info->slock, flags);
1159                 }
1160         }
1161         return total;
1162 }
1163
1164 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1165 {
1166         struct mxser_struct *info = tty->driver_data;
1167         unsigned long flags;
1168
1169         if (!info->xmit_buf)
1170                 return;
1171
1172         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1173                 return;
1174
1175         spin_lock_irqsave(&info->slock, flags);
1176         info->xmit_buf[info->xmit_head++] = ch;
1177         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1178         info->xmit_cnt++;
1179         spin_unlock_irqrestore(&info->slock, flags);
1180         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1181                 if (!tty->hw_stopped ||
1182                                 (info->type == PORT_16550A) ||
1183                                 info->IsMoxaMustChipFlag) {
1184                         spin_lock_irqsave(&info->slock, flags);
1185                         info->IER |= UART_IER_THRI;
1186                         outb(info->IER, info->base + UART_IER);
1187                         spin_unlock_irqrestore(&info->slock, flags);
1188                 }
1189         }
1190 }
1191
1192
1193 static void mxser_flush_chars(struct tty_struct *tty)
1194 {
1195         struct mxser_struct *info = tty->driver_data;
1196         unsigned long flags;
1197
1198         if (info->xmit_cnt <= 0 ||
1199                         tty->stopped ||
1200                         !info->xmit_buf ||
1201                         (tty->hw_stopped &&
1202                          (info->type != PORT_16550A) &&
1203                          (!info->IsMoxaMustChipFlag)
1204                         ))
1205                 return;
1206
1207         spin_lock_irqsave(&info->slock, flags);
1208
1209         info->IER |= UART_IER_THRI;
1210         outb(info->IER, info->base + UART_IER);
1211
1212         spin_unlock_irqrestore(&info->slock, flags);
1213 }
1214
1215 static int mxser_write_room(struct tty_struct *tty)
1216 {
1217         struct mxser_struct *info = tty->driver_data;
1218         int ret;
1219
1220         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1221         if (ret < 0)
1222                 ret = 0;
1223         return ret;
1224 }
1225
1226 static int mxser_chars_in_buffer(struct tty_struct *tty)
1227 {
1228         struct mxser_struct *info = tty->driver_data;
1229         return info->xmit_cnt;
1230 }
1231
1232 static void mxser_flush_buffer(struct tty_struct *tty)
1233 {
1234         struct mxser_struct *info = tty->driver_data;
1235         char fcr;
1236         unsigned long flags;
1237
1238
1239         spin_lock_irqsave(&info->slock, flags);
1240         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1241
1242         /* below added by shinhay */
1243         fcr = inb(info->base + UART_FCR);
1244         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1245                 info->base + UART_FCR);
1246         outb(fcr, info->base + UART_FCR);
1247
1248         spin_unlock_irqrestore(&info->slock, flags);
1249         /* above added by shinhay */
1250
1251         tty_wakeup(tty);
1252 }
1253
1254 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1255 {
1256         struct mxser_struct *info = tty->driver_data;
1257         int retval;
1258         struct async_icount cprev, cnow;        /* kernel counter temps */
1259         struct serial_icounter_struct __user *p_cuser;
1260         unsigned long templ;
1261         unsigned long flags;
1262         void __user *argp = (void __user *)arg;
1263
1264         if (tty->index == MXSER_PORTS)
1265                 return mxser_ioctl_special(cmd, argp);
1266
1267         /* following add by Victor Yu. 01-05-2004 */
1268         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1269                 int opmode, p;
1270                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1271                 int shiftbit;
1272                 unsigned char val, mask;
1273
1274                 p = info->port % 4;
1275                 if (cmd == MOXA_SET_OP_MODE) {
1276                         if (get_user(opmode, (int __user *) argp))
1277                                 return -EFAULT;
1278                         if (opmode != RS232_MODE &&
1279                                         opmode != RS485_2WIRE_MODE &&
1280                                         opmode != RS422_MODE &&
1281                                         opmode != RS485_4WIRE_MODE)
1282                                 return -EFAULT;
1283                         mask = ModeMask[p];
1284                         shiftbit = p * 2;
1285                         val = inb(info->opmode_ioaddr);
1286                         val &= mask;
1287                         val |= (opmode << shiftbit);
1288                         outb(val, info->opmode_ioaddr);
1289                 } else {
1290                         shiftbit = p * 2;
1291                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1292                         opmode &= OP_MODE_MASK;
1293                         if (copy_to_user(argp, &opmode, sizeof(int)))
1294                                 return -EFAULT;
1295                 }
1296                 return 0;
1297         }
1298         /* above add by Victor Yu. 01-05-2004 */
1299
1300         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1301                 if (tty->flags & (1 << TTY_IO_ERROR))
1302                         return -EIO;
1303         }
1304         switch (cmd) {
1305         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1306                 retval = tty_check_change(tty);
1307                 if (retval)
1308                         return retval;
1309                 tty_wait_until_sent(tty, 0);
1310                 if (!arg)
1311                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1312                 return 0;
1313         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1314                 retval = tty_check_change(tty);
1315                 if (retval)
1316                         return retval;
1317                 tty_wait_until_sent(tty, 0);
1318                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1319                 return 0;
1320         case TIOCGSOFTCAR:
1321                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1322         case TIOCSSOFTCAR:
1323                 if (get_user(templ, (unsigned long __user *) argp))
1324                         return -EFAULT;
1325                 arg = templ;
1326                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1327                 return 0;
1328         case TIOCGSERIAL:
1329                 return mxser_get_serial_info(info, argp);
1330         case TIOCSSERIAL:
1331                 return mxser_set_serial_info(info, argp);
1332         case TIOCSERGETLSR:     /* Get line status register */
1333                 return mxser_get_lsr_info(info, argp);
1334                 /*
1335                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1336                  * - mask passed in arg for lines of interest
1337                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1338                  * Caller should use TIOCGICOUNT to see which one it was
1339                  */
1340         case TIOCMIWAIT:
1341                 spin_lock_irqsave(&info->slock, flags);
1342                 cnow = info->icount;    /* note the counters on entry */
1343                 spin_unlock_irqrestore(&info->slock, flags);
1344
1345                 wait_event_interruptible(info->delta_msr_wait, ({
1346                         cprev = cnow;
1347                         spin_lock_irqsave(&info->slock, flags);
1348                         cnow = info->icount;    /* atomic copy */
1349                         spin_unlock_irqrestore(&info->slock, flags);
1350
1351                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1352                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1353                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1354                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1355                 }));
1356                 break;
1357                 /*
1358                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1359                  * Return: write counters to the user passed counter struct
1360                  * NB: both 1->0 and 0->1 transitions are counted except for
1361                  *     RI where only 0->1 is counted.
1362                  */
1363         case TIOCGICOUNT:
1364                 spin_lock_irqsave(&info->slock, flags);
1365                 cnow = info->icount;
1366                 spin_unlock_irqrestore(&info->slock, flags);
1367                 p_cuser = argp;
1368                 /* modified by casper 1/11/2000 */
1369                 if (put_user(cnow.frame, &p_cuser->frame))
1370                         return -EFAULT;
1371                 if (put_user(cnow.brk, &p_cuser->brk))
1372                         return -EFAULT;
1373                 if (put_user(cnow.overrun, &p_cuser->overrun))
1374                         return -EFAULT;
1375                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1376                         return -EFAULT;
1377                 if (put_user(cnow.parity, &p_cuser->parity))
1378                         return -EFAULT;
1379                 if (put_user(cnow.rx, &p_cuser->rx))
1380                         return -EFAULT;
1381                 if (put_user(cnow.tx, &p_cuser->tx))
1382                         return -EFAULT;
1383                 put_user(cnow.cts, &p_cuser->cts);
1384                 put_user(cnow.dsr, &p_cuser->dsr);
1385                 put_user(cnow.rng, &p_cuser->rng);
1386                 put_user(cnow.dcd, &p_cuser->dcd);
1387                 return 0;
1388         case MOXA_HighSpeedOn:
1389                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1390         case MOXA_SDS_RSTICOUNTER: {
1391                         info->mon_data.rxcnt = 0;
1392                         info->mon_data.txcnt = 0;
1393                         return 0;
1394                 }
1395 /* (above) added by James. */
1396         case MOXA_ASPP_SETBAUD:{
1397                         long baud;
1398                         if (get_user(baud, (long __user *)argp))
1399                                 return -EFAULT;
1400                         mxser_set_baud(info, baud);
1401                         return 0;
1402                 }
1403         case MOXA_ASPP_GETBAUD:
1404                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1405                         return -EFAULT;
1406
1407                 return 0;
1408
1409         case MOXA_ASPP_OQUEUE:{
1410                         int len, lsr;
1411
1412                         len = mxser_chars_in_buffer(tty);
1413
1414                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1415
1416                         len += (lsr ? 0 : 1);
1417
1418                         if (copy_to_user(argp, &len, sizeof(int)))
1419                                 return -EFAULT;
1420
1421                         return 0;
1422                 }
1423         case MOXA_ASPP_MON: {
1424                         int mcr, status;
1425
1426                         /* info->mon_data.ser_param = tty->termios->c_cflag; */
1427
1428                         status = mxser_get_msr(info->base, 1, info->port, info);
1429                         mxser_check_modem_status(info, status);
1430
1431                         mcr = inb(info->base + UART_MCR);
1432                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1433                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1434                         else
1435                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1436
1437                         if (mcr & MOXA_MUST_MCR_TX_XON)
1438                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1439                         else
1440                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1441
1442                         if (info->tty->hw_stopped)
1443                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1444                         else
1445                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1446
1447                         if (copy_to_user(argp, &info->mon_data,
1448                                         sizeof(struct mxser_mon)))
1449                                 return -EFAULT;
1450
1451                         return 0;
1452                 }
1453
1454         case MOXA_ASPP_LSTATUS: {
1455                         if (copy_to_user(argp, &info->err_shadow,
1456                                         sizeof(unsigned char)))
1457                                 return -EFAULT;
1458
1459                         info->err_shadow = 0;
1460                         return 0;
1461                 }
1462         case MOXA_SET_BAUD_METHOD: {
1463                         int method;
1464
1465                         if (get_user(method, (int __user *)argp))
1466                                 return -EFAULT;
1467                         mxser_set_baud_method[info->port] = method;
1468                         if (copy_to_user(argp, &method, sizeof(int)))
1469                                 return -EFAULT;
1470
1471                         return 0;
1472                 }
1473         default:
1474                 return -ENOIOCTLCMD;
1475         }
1476         return 0;
1477 }
1478
1479 #ifndef CMSPAR
1480 #define CMSPAR 010000000000
1481 #endif
1482
1483 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1484 {
1485         int i, result, status;
1486
1487         switch (cmd) {
1488         case MOXA_GET_CONF:
1489                 if (copy_to_user(argp, mxsercfg,
1490                                 sizeof(struct mxser_hwconf) * 4))
1491                         return -EFAULT;
1492                 return 0;
1493         case MOXA_GET_MAJOR:
1494                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1495                         return -EFAULT;
1496                 return 0;
1497
1498         case MOXA_GET_CUMAJOR:
1499                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1500                         return -EFAULT;
1501                 return 0;
1502
1503         case MOXA_CHKPORTENABLE:
1504                 result = 0;
1505                 for (i = 0; i < MXSER_PORTS; i++) {
1506                         if (mxvar_table[i].base)
1507                                 result |= (1 << i);
1508                 }
1509                 return put_user(result, (unsigned long __user *)argp);
1510         case MOXA_GETDATACOUNT:
1511                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1512                         return -EFAULT;
1513                 return 0;
1514         case MOXA_GETMSTATUS:
1515                 for (i = 0; i < MXSER_PORTS; i++) {
1516                         GMStatus[i].ri = 0;
1517                         if (!mxvar_table[i].base) {
1518                                 GMStatus[i].dcd = 0;
1519                                 GMStatus[i].dsr = 0;
1520                                 GMStatus[i].cts = 0;
1521                                 continue;
1522                         }
1523
1524                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1525                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1526                         else
1527                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1528
1529                         status = inb(mxvar_table[i].base + UART_MSR);
1530                         if (status & 0x80 /*UART_MSR_DCD */ )
1531                                 GMStatus[i].dcd = 1;
1532                         else
1533                                 GMStatus[i].dcd = 0;
1534
1535                         if (status & 0x20 /*UART_MSR_DSR */ )
1536                                 GMStatus[i].dsr = 1;
1537                         else
1538                                 GMStatus[i].dsr = 0;
1539
1540
1541                         if (status & 0x10 /*UART_MSR_CTS */ )
1542                                 GMStatus[i].cts = 1;
1543                         else
1544                                 GMStatus[i].cts = 0;
1545                 }
1546                 if (copy_to_user(argp, GMStatus,
1547                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1548                         return -EFAULT;
1549                 return 0;
1550         case MOXA_ASPP_MON_EXT: {
1551                         int status;
1552                         int opmode, p;
1553                         int shiftbit;
1554                         unsigned cflag, iflag;
1555
1556                         for (i = 0; i < MXSER_PORTS; i++) {
1557                                 if (!mxvar_table[i].base)
1558                                         continue;
1559
1560                                 status = mxser_get_msr(mxvar_table[i].base, 0,
1561                                                         i, &(mxvar_table[i]));
1562                                 /*
1563                                 mxser_check_modem_status(&mxvar_table[i],
1564                                                                 status);
1565                                 */
1566                                 if (status & UART_MSR_TERI)
1567                                         mxvar_table[i].icount.rng++;
1568                                 if (status & UART_MSR_DDSR)
1569                                         mxvar_table[i].icount.dsr++;
1570                                 if (status & UART_MSR_DDCD)
1571                                         mxvar_table[i].icount.dcd++;
1572                                 if (status & UART_MSR_DCTS)
1573                                         mxvar_table[i].icount.cts++;
1574
1575                                 mxvar_table[i].mon_data.modem_status = status;
1576                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1577                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1578                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1579                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1580                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1581                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1582
1583                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1584                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1585                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1586                                 } else {
1587                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1588                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1589                                 }
1590
1591                                 mon_data_ext.databits[i] = cflag & CSIZE;
1592
1593                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1594
1595                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1596
1597                                 mon_data_ext.flowctrl[i] = 0x00;
1598
1599                                 if (cflag & CRTSCTS)
1600                                         mon_data_ext.flowctrl[i] |= 0x03;
1601
1602                                 if (iflag & (IXON | IXOFF))
1603                                         mon_data_ext.flowctrl[i] |= 0x0C;
1604
1605                                 if (mxvar_table[i].type == PORT_16550A)
1606                                         mon_data_ext.fifo[i] = 1;
1607                                 else
1608                                         mon_data_ext.fifo[i] = 0;
1609
1610                                 p = i % 4;
1611                                 shiftbit = p * 2;
1612                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1613                                 opmode &= OP_MODE_MASK;
1614
1615                                 mon_data_ext.iftype[i] = opmode;
1616
1617                         }
1618                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1619                                 return -EFAULT;
1620
1621                         return 0;
1622
1623                 }
1624         default:
1625                 return -ENOIOCTLCMD;
1626         }
1627         return 0;
1628 }
1629
1630 static void mxser_stoprx(struct tty_struct *tty)
1631 {
1632         struct mxser_struct *info = tty->driver_data;
1633         /* unsigned long flags; */
1634
1635         info->ldisc_stop_rx = 1;
1636         if (I_IXOFF(tty)) {
1637                 /* MX_LOCK(&info->slock); */
1638                 /* following add by Victor Yu. 09-02-2002 */
1639                 if (info->IsMoxaMustChipFlag) {
1640                         info->IER &= ~MOXA_MUST_RECV_ISR;
1641                         outb(info->IER, info->base + UART_IER);
1642                 } else {
1643                         /* above add by Victor Yu. 09-02-2002 */
1644                         info->x_char = STOP_CHAR(tty);
1645                         /* mask by Victor Yu. 09-02-2002 */
1646                         /* outb(info->IER, 0); */
1647                         outb(0, info->base + UART_IER);
1648                         info->IER |= UART_IER_THRI;
1649                         /* force Tx interrupt */
1650                         outb(info->IER, info->base + UART_IER);
1651                 }               /* add by Victor Yu. 09-02-2002 */
1652                 /* MX_UNLOCK(&info->slock); */
1653         }
1654
1655         if (info->tty->termios->c_cflag & CRTSCTS) {
1656                 /* MX_LOCK(&info->slock); */
1657                 info->MCR &= ~UART_MCR_RTS;
1658                 outb(info->MCR, info->base + UART_MCR);
1659                 /* MX_UNLOCK(&info->slock); */
1660         }
1661 }
1662
1663 static void mxser_startrx(struct tty_struct *tty)
1664 {
1665         struct mxser_struct *info = tty->driver_data;
1666         /* unsigned long flags; */
1667
1668         info->ldisc_stop_rx = 0;
1669         if (I_IXOFF(tty)) {
1670                 if (info->x_char)
1671                         info->x_char = 0;
1672                 else {
1673                         /* MX_LOCK(&info->slock); */
1674
1675                         /* following add by Victor Yu. 09-02-2002 */
1676                         if (info->IsMoxaMustChipFlag) {
1677                                 info->IER |= MOXA_MUST_RECV_ISR;
1678                                 outb(info->IER, info->base + UART_IER);
1679                         } else {
1680                                 /* above add by Victor Yu. 09-02-2002 */
1681
1682                                 info->x_char = START_CHAR(tty);
1683                                 /* mask by Victor Yu. 09-02-2002 */
1684                                 /* outb(info->IER, 0); */
1685                                 /* add by Victor Yu. 09-02-2002 */
1686                                 outb(0, info->base + UART_IER);
1687                                 /* force Tx interrupt */
1688                                 info->IER |= UART_IER_THRI;
1689                                 outb(info->IER, info->base + UART_IER);
1690                         }       /* add by Victor Yu. 09-02-2002 */
1691                         /* MX_UNLOCK(&info->slock); */
1692                 }
1693         }
1694
1695         if (info->tty->termios->c_cflag & CRTSCTS) {
1696                 /* MX_LOCK(&info->slock); */
1697                 info->MCR |= UART_MCR_RTS;
1698                 outb(info->MCR, info->base + UART_MCR);
1699                 /* MX_UNLOCK(&info->slock); */
1700         }
1701 }
1702
1703 /*
1704  * This routine is called by the upper-layer tty layer to signal that
1705  * incoming characters should be throttled.
1706  */
1707 static void mxser_throttle(struct tty_struct *tty)
1708 {
1709         /* struct mxser_struct *info = tty->driver_data; */
1710         /* unsigned long flags; */
1711
1712         /* MX_LOCK(&info->slock); */
1713         mxser_stoprx(tty);
1714         /* MX_UNLOCK(&info->slock); */
1715 }
1716
1717 static void mxser_unthrottle(struct tty_struct *tty)
1718 {
1719         /* struct mxser_struct *info = tty->driver_data; */
1720         /* unsigned long flags; */
1721
1722         /* MX_LOCK(&info->slock); */
1723         mxser_startrx(tty);
1724         /* MX_UNLOCK(&info->slock); */
1725 }
1726
1727 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1728 {
1729         struct mxser_struct *info = tty->driver_data;
1730         unsigned long flags;
1731
1732         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1733                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1734
1735                 mxser_change_speed(info, old_termios);
1736
1737                 if ((old_termios->c_cflag & CRTSCTS) &&
1738                                 !(tty->termios->c_cflag & CRTSCTS)) {
1739                         tty->hw_stopped = 0;
1740                         mxser_start(tty);
1741                 }
1742         }
1743
1744 /* Handle sw stopped */
1745         if ((old_termios->c_iflag & IXON) &&
1746                         !(tty->termios->c_iflag & IXON)) {
1747                 tty->stopped = 0;
1748
1749                 /* following add by Victor Yu. 09-02-2002 */
1750                 if (info->IsMoxaMustChipFlag) {
1751                         spin_lock_irqsave(&info->slock, flags);
1752                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1753                         spin_unlock_irqrestore(&info->slock, flags);
1754                 }
1755                 /* above add by Victor Yu. 09-02-2002 */
1756
1757                 mxser_start(tty);
1758         }
1759 }
1760
1761 /*
1762  * mxser_stop() and mxser_start()
1763  *
1764  * This routines are called before setting or resetting tty->stopped.
1765  * They enable or disable transmitter interrupts, as necessary.
1766  */
1767 static void mxser_stop(struct tty_struct *tty)
1768 {
1769         struct mxser_struct *info = tty->driver_data;
1770         unsigned long flags;
1771
1772         spin_lock_irqsave(&info->slock, flags);
1773         if (info->IER & UART_IER_THRI) {
1774                 info->IER &= ~UART_IER_THRI;
1775                 outb(info->IER, info->base + UART_IER);
1776         }
1777         spin_unlock_irqrestore(&info->slock, flags);
1778 }
1779
1780 static void mxser_start(struct tty_struct *tty)
1781 {
1782         struct mxser_struct *info = tty->driver_data;
1783         unsigned long flags;
1784
1785         spin_lock_irqsave(&info->slock, flags);
1786         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1787                 info->IER |= UART_IER_THRI;
1788                 outb(info->IER, info->base + UART_IER);
1789         }
1790         spin_unlock_irqrestore(&info->slock, flags);
1791 }
1792
1793 /*
1794  * mxser_wait_until_sent() --- wait until the transmitter is empty
1795  */
1796 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1797 {
1798         struct mxser_struct *info = tty->driver_data;
1799         unsigned long orig_jiffies, char_time;
1800         int lsr;
1801
1802         if (info->type == PORT_UNKNOWN)
1803                 return;
1804
1805         if (info->xmit_fifo_size == 0)
1806                 return;         /* Just in case.... */
1807
1808         orig_jiffies = jiffies;
1809         /*
1810          * Set the check interval to be 1/5 of the estimated time to
1811          * send a single character, and make it at least 1.  The check
1812          * interval should also be less than the timeout.
1813          *
1814          * Note: we have to use pretty tight timings here to satisfy
1815          * the NIST-PCTS.
1816          */
1817         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1818         char_time = char_time / 5;
1819         if (char_time == 0)
1820                 char_time = 1;
1821         if (timeout && timeout < char_time)
1822                 char_time = timeout;
1823         /*
1824          * If the transmitter hasn't cleared in twice the approximate
1825          * amount of time to send the entire FIFO, it probably won't
1826          * ever clear.  This assumes the UART isn't doing flow
1827          * control, which is currently the case.  Hence, if it ever
1828          * takes longer than info->timeout, this is probably due to a
1829          * UART bug of some kind.  So, we clamp the timeout parameter at
1830          * 2*info->timeout.
1831          */
1832         if (!timeout || timeout > 2 * info->timeout)
1833                 timeout = 2 * info->timeout;
1834 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1835         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1836                 timeout, char_time);
1837         printk("jiff=%lu...", jiffies);
1838 #endif
1839         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1840 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1841                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1842 #endif
1843                 schedule_timeout_interruptible(char_time);
1844                 if (signal_pending(current))
1845                         break;
1846                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1847                         break;
1848         }
1849         set_current_state(TASK_RUNNING);
1850
1851 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1852         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1853 #endif
1854 }
1855
1856
1857 /*
1858  * This routine is called by tty_hangup() when a hangup is signaled.
1859  */
1860 void mxser_hangup(struct tty_struct *tty)
1861 {
1862         struct mxser_struct *info = tty->driver_data;
1863
1864         mxser_flush_buffer(tty);
1865         mxser_shutdown(info);
1866         info->event = 0;
1867         info->count = 0;
1868         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1869         info->tty = NULL;
1870         wake_up_interruptible(&info->open_wait);
1871 }
1872
1873
1874 /* added by James 03-12-2004. */
1875 /*
1876  * mxser_rs_break() --- routine which turns the break handling on or off
1877  */
1878 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1879 {
1880         struct mxser_struct *info = tty->driver_data;
1881         unsigned long flags;
1882
1883         spin_lock_irqsave(&info->slock, flags);
1884         if (break_state == -1)
1885                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1886                         info->base + UART_LCR);
1887         else
1888                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1889                         info->base + UART_LCR);
1890         spin_unlock_irqrestore(&info->slock, flags);
1891 }
1892
1893 /* (above) added by James. */
1894
1895
1896 /*
1897  * This is the serial driver's generic interrupt routine
1898  */
1899 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
1900 {
1901         int status, iir, i;
1902         struct mxser_struct *info;
1903         struct mxser_struct *port;
1904         int max, irqbits, bits, msr;
1905         int pass_counter = 0;
1906         int handled = IRQ_NONE;
1907
1908         port = NULL;
1909         /* spin_lock(&gm_lock); */
1910
1911         for (i = 0; i < MXSER_BOARDS; i++) {
1912                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1913                         port = dev_id;
1914                         break;
1915                 }
1916         }
1917
1918         if (i == MXSER_BOARDS)
1919                 goto irq_stop;
1920         if (port == 0)
1921                 goto irq_stop;
1922         max = mxser_numports[mxsercfg[i].board_type - 1];
1923         while (1) {
1924                 irqbits = inb(port->vector) & port->vectormask;
1925                 if (irqbits == port->vectormask)
1926                         break;
1927
1928                 handled = IRQ_HANDLED;
1929                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1930                         if (irqbits == port->vectormask)
1931                                 break;
1932                         if (bits & irqbits)
1933                                 continue;
1934                         info = port + i;
1935
1936                         /* following add by Victor Yu. 09-13-2002 */
1937                         iir = inb(info->base + UART_IIR);
1938                         if (iir & UART_IIR_NO_INT)
1939                                 continue;
1940                         iir &= MOXA_MUST_IIR_MASK;
1941                         if (!info->tty) {
1942                                 status = inb(info->base + UART_LSR);
1943                                 outb(0x27, info->base + UART_FCR);
1944                                 inb(info->base + UART_MSR);
1945                                 continue;
1946                         }
1947                         /* above add by Victor Yu. 09-13-2002 */
1948                         /*
1949                            if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1950                            info->IER |= MOXA_MUST_RECV_ISR;
1951                            outb(info->IER, info->base + UART_IER);
1952                            }
1953                          */
1954
1955
1956                         /* mask by Victor Yu. 09-13-2002
1957                            if ( !info->tty ||
1958                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1959                            continue;
1960                          */
1961                         /* mask by Victor Yu. 09-02-2002
1962                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1963                          */
1964
1965                         /* following add by Victor Yu. 09-02-2002 */
1966                         status = inb(info->base + UART_LSR);
1967
1968                         if (status & UART_LSR_PE)
1969                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1970                         if (status & UART_LSR_FE)
1971                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1972                         if (status & UART_LSR_OE)
1973                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1974                         if (status & UART_LSR_BI)
1975                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
1976
1977                         if (info->IsMoxaMustChipFlag) {
1978                                 /*
1979                                    if ( (status & 0x02) && !(status & 0x01) ) {
1980                                    outb(info->base+UART_FCR,  0x23);
1981                                    continue;
1982                                    }
1983                                  */
1984                                 if (iir == MOXA_MUST_IIR_GDA ||
1985                                                 iir == MOXA_MUST_IIR_RDA ||
1986                                                 iir == MOXA_MUST_IIR_RTO ||
1987                                                 iir == MOXA_MUST_IIR_LSR)
1988                                         mxser_receive_chars(info, &status);
1989
1990                         } else {
1991                                 /* above add by Victor Yu. 09-02-2002 */
1992
1993                                 status &= info->read_status_mask;
1994                                 if (status & UART_LSR_DR)
1995                                         mxser_receive_chars(info, &status);
1996                         }
1997                         msr = inb(info->base + UART_MSR);
1998                         if (msr & UART_MSR_ANY_DELTA) {
1999                                 mxser_check_modem_status(info, msr);
2000                         }
2001                         /* following add by Victor Yu. 09-13-2002 */
2002                         if (info->IsMoxaMustChipFlag) {
2003                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2004                                         mxser_transmit_chars(info);
2005                                 }
2006                         } else {
2007                                 /* above add by Victor Yu. 09-13-2002 */
2008
2009                                 if (status & UART_LSR_THRE) {
2010 /* 8-2-99 by William
2011                             if ( info->x_char || (info->xmit_cnt > 0) )
2012 */
2013                                         mxser_transmit_chars(info);
2014                                 }
2015                         }
2016                 }
2017                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2018                         break;  /* Prevent infinite loops */
2019                 }
2020         }
2021
2022       irq_stop:
2023         /* spin_unlock(&gm_lock); */
2024         return handled;
2025 }
2026
2027 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2028 {
2029         struct tty_struct *tty = info->tty;
2030         unsigned char ch, gdl;
2031         int ignored = 0;
2032         int cnt = 0;
2033         int recv_room;
2034         int max = 256;
2035         unsigned long flags;
2036
2037         spin_lock_irqsave(&info->slock, flags);
2038
2039         recv_room = tty->receive_room;
2040         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2041                 /* mxser_throttle(tty); */
2042                 mxser_stoprx(tty);
2043                 /* return; */
2044         }
2045
2046         /* following add by Victor Yu. 09-02-2002 */
2047         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2048
2049                 if (*status & UART_LSR_SPECIAL) {
2050                         goto intr_old;
2051                 }
2052                 /* following add by Victor Yu. 02-11-2004 */
2053                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2054                                 (*status & MOXA_MUST_LSR_RERR))
2055                         goto intr_old;
2056                 /* above add by Victor Yu. 02-14-2004 */
2057                 if (*status & MOXA_MUST_LSR_RERR)
2058                         goto intr_old;
2059
2060                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2061
2062                 /* add by Victor Yu. 02-11-2004 */
2063                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2064                         gdl &= MOXA_MUST_GDL_MASK;
2065                 if (gdl >= recv_room) {
2066                         if (!info->ldisc_stop_rx) {
2067                                 /* mxser_throttle(tty); */
2068                                 mxser_stoprx(tty);
2069                         }
2070                         /* return; */
2071                 }
2072                 while (gdl--) {
2073                         ch = inb(info->base + UART_RX);
2074                         tty_insert_flip_char(tty, ch, 0);
2075                         cnt++;
2076                         /*
2077                            if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2078                            mxser_stoprx(tty);
2079                            info->stop_rx = 1;
2080                            break;
2081                            } */
2082                 }
2083                 goto end_intr;
2084         }
2085  intr_old:
2086         /* above add by Victor Yu. 09-02-2002 */
2087
2088         do {
2089                 if (max-- < 0)
2090                         break;
2091                 /*
2092                    if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2093                    mxser_stoprx(tty);
2094                    info->stop_rx=1;
2095                    break;
2096                    }
2097                  */
2098
2099                 ch = inb(info->base + UART_RX);
2100                 /* following add by Victor Yu. 09-02-2002 */
2101                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2102                         outb(0x23, info->base + UART_FCR);
2103                 *status &= info->read_status_mask;
2104                 /* above add by Victor Yu. 09-02-2002 */
2105                 if (*status & info->ignore_status_mask) {
2106                         if (++ignored > 100)
2107                                 break;
2108                 } else {
2109                         char flag = 0;
2110                         if (*status & UART_LSR_SPECIAL) {
2111                                 if (*status & UART_LSR_BI) {
2112                                         flag = TTY_BREAK;
2113 /* added by casper 1/11/2000 */
2114                                         info->icount.brk++;
2115 /* */
2116                                         if (info->flags & ASYNC_SAK)
2117                                                 do_SAK(tty);
2118                                 } else if (*status & UART_LSR_PE) {
2119                                         flag = TTY_PARITY;
2120 /* added by casper 1/11/2000 */
2121                                         info->icount.parity++;
2122 /* */
2123                                 } else if (*status & UART_LSR_FE) {
2124                                         flag = TTY_FRAME;
2125 /* added by casper 1/11/2000 */
2126                                         info->icount.frame++;
2127 /* */
2128                                 } else if (*status & UART_LSR_OE) {
2129                                         flag = TTY_OVERRUN;
2130 /* added by casper 1/11/2000 */
2131                                         info->icount.overrun++;
2132 /* */
2133                                 }
2134                         }
2135                         tty_insert_flip_char(tty, ch, flag);
2136                         cnt++;
2137                         if (cnt >= recv_room) {
2138                                 if (!info->ldisc_stop_rx) {
2139                                         /* mxser_throttle(tty); */
2140                                         mxser_stoprx(tty);
2141                                 }
2142                                 break;
2143                         }
2144
2145                 }
2146
2147                 /* following add by Victor Yu. 09-02-2002 */
2148                 if (info->IsMoxaMustChipFlag)
2149                         break;
2150                 /* above add by Victor Yu. 09-02-2002 */
2151
2152                 /* mask by Victor Yu. 09-02-2002
2153                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2154                  */
2155                 /* following add by Victor Yu. 09-02-2002 */
2156                 *status = inb(info->base + UART_LSR);
2157                 /* above add by Victor Yu. 09-02-2002 */
2158         } while (*status & UART_LSR_DR);
2159
2160 end_intr:               /* add by Victor Yu. 09-02-2002 */
2161         mxvar_log.rxcnt[info->port] += cnt;
2162         info->mon_data.rxcnt += cnt;
2163         info->mon_data.up_rxcnt += cnt;
2164         spin_unlock_irqrestore(&info->slock, flags);
2165
2166         tty_flip_buffer_push(tty);
2167 }
2168
2169 static void mxser_transmit_chars(struct mxser_struct *info)
2170 {
2171         int count, cnt;
2172         unsigned long flags;
2173
2174         spin_lock_irqsave(&info->slock, flags);
2175
2176         if (info->x_char) {
2177                 outb(info->x_char, info->base + UART_TX);
2178                 info->x_char = 0;
2179                 mxvar_log.txcnt[info->port]++;
2180                 info->mon_data.txcnt++;
2181                 info->mon_data.up_txcnt++;
2182
2183 /* added by casper 1/11/2000 */
2184                 info->icount.tx++;
2185 /* */
2186                 spin_unlock_irqrestore(&info->slock, flags);
2187                 return;
2188         }
2189
2190         if (info->xmit_buf == 0) {
2191                 spin_unlock_irqrestore(&info->slock, flags);
2192                 return;
2193         }
2194
2195         if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2196                         (info->tty->hw_stopped &&
2197                         (info->type != PORT_16550A) &&
2198                         (!info->IsMoxaMustChipFlag))) {
2199                 info->IER &= ~UART_IER_THRI;
2200                 outb(info->IER, info->base + UART_IER);
2201                 spin_unlock_irqrestore(&info->slock, flags);
2202                 return;
2203         }
2204
2205         cnt = info->xmit_cnt;
2206         count = info->xmit_fifo_size;
2207         do {
2208                 outb(info->xmit_buf[info->xmit_tail++],
2209                         info->base + UART_TX);
2210                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2211                 if (--info->xmit_cnt <= 0)
2212                         break;
2213         } while (--count > 0);
2214         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2215
2216 /* added by James 03-12-2004. */
2217         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2218         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2219 /* (above) added by James. */
2220
2221 /* added by casper 1/11/2000 */
2222         info->icount.tx += (cnt - info->xmit_cnt);
2223 /* */
2224
2225         if (info->xmit_cnt < WAKEUP_CHARS) {
2226                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2227                 schedule_work(&info->tqueue);
2228         }
2229         if (info->xmit_cnt <= 0) {
2230                 info->IER &= ~UART_IER_THRI;
2231                 outb(info->IER, info->base + UART_IER);
2232         }
2233         spin_unlock_irqrestore(&info->slock, flags);
2234 }
2235
2236 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2237 {
2238         /* update input line counters */
2239         if (status & UART_MSR_TERI)
2240                 info->icount.rng++;
2241         if (status & UART_MSR_DDSR)
2242                 info->icount.dsr++;
2243         if (status & UART_MSR_DDCD)
2244                 info->icount.dcd++;
2245         if (status & UART_MSR_DCTS)
2246                 info->icount.cts++;
2247         info->mon_data.modem_status = status;
2248         wake_up_interruptible(&info->delta_msr_wait);
2249
2250         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2251                 if (status & UART_MSR_DCD)
2252                         wake_up_interruptible(&info->open_wait);
2253                 schedule_work(&info->tqueue);
2254         }
2255
2256         if (info->flags & ASYNC_CTS_FLOW) {
2257                 if (info->tty->hw_stopped) {
2258                         if (status & UART_MSR_CTS) {
2259                                 info->tty->hw_stopped = 0;
2260
2261                                 if ((info->type != PORT_16550A) &&
2262                                                 (!info->IsMoxaMustChipFlag)) {
2263                                         info->IER |= UART_IER_THRI;
2264                                         outb(info->IER, info->base + UART_IER);
2265                                 }
2266                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2267                                 schedule_work(&info->tqueue);                   }
2268                 } else {
2269                         if (!(status & UART_MSR_CTS)) {
2270                                 info->tty->hw_stopped = 1;
2271                                 if ((info->type != PORT_16550A) &&
2272                                                 (!info->IsMoxaMustChipFlag)) {
2273                                         info->IER &= ~UART_IER_THRI;
2274                                         outb(info->IER, info->base + UART_IER);
2275                                 }
2276                         }
2277                 }
2278         }
2279 }
2280
2281 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2282 {
2283         DECLARE_WAITQUEUE(wait, current);
2284         int retval;
2285         int do_clocal = 0;
2286         unsigned long flags;
2287
2288         /*
2289          * If non-blocking mode is set, or the port is not enabled,
2290          * then make the check up front and then exit.
2291          */
2292         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2293                 info->flags |= ASYNC_NORMAL_ACTIVE;
2294                 return 0;
2295         }
2296
2297         if (tty->termios->c_cflag & CLOCAL)
2298                 do_clocal = 1;
2299
2300         /*
2301          * Block waiting for the carrier detect and the line to become
2302          * free (i.e., not in use by the callout).  While we are in
2303          * this loop, info->count is dropped by one, so that
2304          * mxser_close() knows when to free things.  We restore it upon
2305          * exit, either normal or abnormal.
2306          */
2307         retval = 0;
2308         add_wait_queue(&info->open_wait, &wait);
2309
2310         spin_lock_irqsave(&info->slock, flags);
2311         if (!tty_hung_up_p(filp))
2312                 info->count--;
2313         spin_unlock_irqrestore(&info->slock, flags);
2314         info->blocked_open++;
2315         while (1) {
2316                 spin_lock_irqsave(&info->slock, flags);
2317                 outb(inb(info->base + UART_MCR) |
2318                         UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2319                 spin_unlock_irqrestore(&info->slock, flags);
2320                 set_current_state(TASK_INTERRUPTIBLE);
2321                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2322                         if (info->flags & ASYNC_HUP_NOTIFY)
2323                                 retval = -EAGAIN;
2324                         else
2325                                 retval = -ERESTARTSYS;
2326                         break;
2327                 }
2328                 if (!(info->flags & ASYNC_CLOSING) &&
2329                                 (do_clocal ||
2330                                 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2331                         break;
2332                 if (signal_pending(current)) {
2333                         retval = -ERESTARTSYS;
2334                         break;
2335                 }
2336                 schedule();
2337         }
2338         set_current_state(TASK_RUNNING);
2339         remove_wait_queue(&info->open_wait, &wait);
2340         if (!tty_hung_up_p(filp))
2341                 info->count++;
2342         info->blocked_open--;
2343         if (retval)
2344                 return retval;
2345         info->flags |= ASYNC_NORMAL_ACTIVE;
2346         return 0;
2347 }
2348
2349 static int mxser_startup(struct mxser_struct *info)
2350 {
2351         unsigned long page;
2352         unsigned long flags;
2353
2354         page = __get_free_page(GFP_KERNEL);
2355         if (!page)
2356                 return -ENOMEM;
2357
2358         spin_lock_irqsave(&info->slock, flags);
2359
2360         if (info->flags & ASYNC_INITIALIZED) {
2361                 free_page(page);
2362                 spin_unlock_irqrestore(&info->slock, flags);
2363                 return 0;
2364         }
2365
2366         if (!info->base || !info->type) {
2367                 if (info->tty)
2368                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2369                 free_page(page);
2370                 spin_unlock_irqrestore(&info->slock, flags);
2371                 return 0;
2372         }
2373         if (info->xmit_buf)
2374                 free_page(page);
2375         else
2376                 info->xmit_buf = (unsigned char *) page;
2377
2378         /*
2379          * Clear the FIFO buffers and disable them
2380          * (they will be reenabled in mxser_change_speed())
2381          */
2382         if (info->IsMoxaMustChipFlag)
2383                 outb((UART_FCR_CLEAR_RCVR |
2384                         UART_FCR_CLEAR_XMIT |
2385                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2386         else
2387                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2388                         info->base + UART_FCR);
2389
2390         /*
2391          * At this point there's no way the LSR could still be 0xFF;
2392          * if it is, then bail out, because there's likely no UART
2393          * here.
2394          */
2395         if (inb(info->base + UART_LSR) == 0xff) {
2396                 spin_unlock_irqrestore(&info->slock, flags);
2397                 if (capable(CAP_SYS_ADMIN)) {
2398                         if (info->tty)
2399                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2400                         return 0;
2401                 } else
2402                         return -ENODEV;
2403         }
2404
2405         /*
2406          * Clear the interrupt registers.
2407          */
2408         (void) inb(info->base + UART_LSR);
2409         (void) inb(info->base + UART_RX);
2410         (void) inb(info->base + UART_IIR);
2411         (void) inb(info->base + UART_MSR);
2412
2413         /*
2414          * Now, initialize the UART
2415          */
2416         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2417         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2418         outb(info->MCR, info->base + UART_MCR);
2419
2420         /*
2421          * Finally, enable interrupts
2422          */
2423         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2424         /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2425
2426         /* following add by Victor Yu. 08-30-2002 */
2427         if (info->IsMoxaMustChipFlag)
2428                 info->IER |= MOXA_MUST_IER_EGDAI;
2429         /* above add by Victor Yu. 08-30-2002 */
2430         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2431
2432         /*
2433          * And clear the interrupt registers again for luck.
2434          */
2435         (void) inb(info->base + UART_LSR);
2436         (void) inb(info->base + UART_RX);
2437         (void) inb(info->base + UART_IIR);
2438         (void) inb(info->base + UART_MSR);
2439
2440         if (info->tty)
2441                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2442         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2443
2444         /*
2445          * and set the speed of the serial port
2446          */
2447         spin_unlock_irqrestore(&info->slock, flags);
2448         mxser_change_speed(info, NULL);
2449
2450         info->flags |= ASYNC_INITIALIZED;
2451         return 0;
2452 }
2453
2454 /*
2455  * This routine will shutdown a serial port; interrupts maybe disabled, and
2456  * DTR is dropped if the hangup on close termio flag is on.
2457  */
2458 static void mxser_shutdown(struct mxser_struct *info)
2459 {
2460         unsigned long flags;
2461
2462         if (!(info->flags & ASYNC_INITIALIZED))
2463                 return;
2464
2465         spin_lock_irqsave(&info->slock, flags);
2466
2467         /*
2468          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2469          * here so the queue might never be waken up
2470          */
2471         wake_up_interruptible(&info->delta_msr_wait);
2472
2473         /*
2474          * Free the IRQ, if necessary
2475          */
2476         if (info->xmit_buf) {
2477                 free_page((unsigned long) info->xmit_buf);
2478                 info->xmit_buf = NULL;
2479         }
2480
2481         info->IER = 0;
2482         outb(0x00, info->base + UART_IER);
2483
2484         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2485                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2486         outb(info->MCR, info->base + UART_MCR);
2487
2488         /* clear Rx/Tx FIFO's */
2489         /* following add by Victor Yu. 08-30-2002 */
2490         if (info->IsMoxaMustChipFlag)
2491                 outb((UART_FCR_CLEAR_RCVR |
2492                         UART_FCR_CLEAR_XMIT |
2493                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2494         else
2495                 /* above add by Victor Yu. 08-30-2002 */
2496                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2497                         info->base + UART_FCR);
2498
2499         /* read data port to reset things */
2500         (void) inb(info->base + UART_RX);
2501
2502         if (info->tty)
2503                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2504
2505         info->flags &= ~ASYNC_INITIALIZED;
2506
2507         /* following add by Victor Yu. 09-23-2002 */
2508         if (info->IsMoxaMustChipFlag)
2509                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2510         /* above add by Victor Yu. 09-23-2002 */
2511
2512         spin_unlock_irqrestore(&info->slock, flags);
2513 }
2514
2515 /*
2516  * This routine is called to set the UART divisor registers to match
2517  * the specified baud rate for a serial port.
2518  */
2519 static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_termios)
2520 {
2521         unsigned cflag, cval, fcr;
2522         int ret = 0;
2523         unsigned char status;
2524         long baud;
2525         unsigned long flags;
2526
2527         if (!info->tty || !info->tty->termios)
2528                 return ret;
2529         cflag = info->tty->termios->c_cflag;
2530         if (!(info->base))
2531                 return ret;
2532
2533 #ifndef B921600
2534 #define B921600 (B460800 +1)
2535 #endif
2536         if (mxser_set_baud_method[info->port] == 0) {
2537                 baud = tty_get_baud_rate(info->tty);
2538                 mxser_set_baud(info, baud);
2539         }
2540
2541         /* byte size and parity */
2542         switch (cflag & CSIZE) {
2543         case CS5:
2544                 cval = 0x00;
2545                 break;
2546         case CS6:
2547                 cval = 0x01;
2548                 break;
2549         case CS7:
2550                 cval = 0x02;
2551                 break;
2552         case CS8:
2553                 cval = 0x03;
2554                 break;
2555         default:
2556                 cval = 0x00;
2557                 break;          /* too keep GCC shut... */
2558         }
2559         if (cflag & CSTOPB)
2560                 cval |= 0x04;
2561         if (cflag & PARENB)
2562                 cval |= UART_LCR_PARITY;
2563         if (!(cflag & PARODD))
2564                 cval |= UART_LCR_EPAR;
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                         switch (info->rx_trigger) {
2584                         case 1:
2585                                 fcr |= UART_FCR_TRIGGER_1;
2586                                 break;
2587                         case 4:
2588                                 fcr |= UART_FCR_TRIGGER_4;
2589                                 break;
2590                         case 8:
2591                                 fcr |= UART_FCR_TRIGGER_8;
2592                                 break;
2593                         default:
2594                                 fcr |= UART_FCR_TRIGGER_14;
2595                                 break;
2596                         }
2597                 }
2598         }
2599
2600         /* CTS flow control flag and modem status interrupts */
2601         info->IER &= ~UART_IER_MSI;
2602         info->MCR &= ~UART_MCR_AFE;
2603         if (cflag & CRTSCTS) {
2604                 info->flags |= ASYNC_CTS_FLOW;
2605                 info->IER |= UART_IER_MSI;
2606                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2607                         info->MCR |= UART_MCR_AFE;
2608                         /* status = mxser_get_msr(info->base, 0, info->port); */
2609 /*
2610         save_flags(flags);
2611         cli();
2612         status = inb(baseaddr + UART_MSR);
2613         restore_flags(flags);
2614 */
2615                         /* mxser_check_modem_status(info, status); */
2616                 } else {
2617                         /* status = mxser_get_msr(info->base, 0, info->port); */
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) &&
2625                                                         (!info->IsMoxaMustChipFlag)) {
2626                                                 info->IER |= UART_IER_THRI;
2627                                                 outb(info->IER, info->base + UART_IER);
2628                                         }
2629                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2630                                         schedule_work(&info->tqueue);                           }
2631                         } else {
2632                                 if (!(status & UART_MSR_CTS)) {
2633                                         info->tty->hw_stopped = 1;
2634                                         if ((info->type != PORT_16550A) &&
2635                                                         (!info->IsMoxaMustChipFlag)) {
2636                                                 info->IER &= ~UART_IER_THRI;
2637                                                 outb(info->IER, info->base + UART_IER);
2638                                         }
2639                                 }
2640                         }
2641                 }
2642         } else {
2643                 info->flags &= ~ASYNC_CTS_FLOW;
2644         }
2645         outb(info->MCR, info->base + UART_MCR);
2646         if (cflag & CLOCAL) {
2647                 info->flags &= ~ASYNC_CHECK_CD;
2648         } else {
2649                 info->flags |= ASYNC_CHECK_CD;
2650                 info->IER |= UART_IER_MSI;
2651         }
2652         outb(info->IER, info->base + UART_IER);
2653
2654         /*
2655          * Set up parity check flag
2656          */
2657         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2658         if (I_INPCK(info->tty))
2659                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2660         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2661                 info->read_status_mask |= UART_LSR_BI;
2662
2663         info->ignore_status_mask = 0;
2664
2665         if (I_IGNBRK(info->tty)) {
2666                 info->ignore_status_mask |= UART_LSR_BI;
2667                 info->read_status_mask |= UART_LSR_BI;
2668                 /*
2669                  * If we're ignore parity and break indicators, ignore
2670                  * overruns too.  (For real raw support).
2671                  */
2672                 if (I_IGNPAR(info->tty)) {
2673                         info->ignore_status_mask |=
2674                                                 UART_LSR_OE |
2675                                                 UART_LSR_PE |
2676                                                 UART_LSR_FE;
2677                         info->read_status_mask |=
2678                                                 UART_LSR_OE |
2679                                                 UART_LSR_PE |
2680                                                 UART_LSR_FE;
2681                 }
2682         }
2683         /* following add by Victor Yu. 09-02-2002 */
2684         if (info->IsMoxaMustChipFlag) {
2685                 spin_lock_irqsave(&info->slock, flags);
2686                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2687                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2688                 if (I_IXON(info->tty)) {
2689                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2690                 } else {
2691                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2692                 }
2693                 if (I_IXOFF(info->tty)) {
2694                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2695                 } else {
2696                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2697                 }
2698                 /*
2699                    if ( I_IXANY(info->tty) ) {
2700                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2701                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2702                    } else {
2703                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2704                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2705                    }
2706                  */
2707                 spin_unlock_irqrestore(&info->slock, flags);
2708         }
2709         /* above add by Victor Yu. 09-02-2002 */
2710
2711
2712         outb(fcr, info->base + UART_FCR);       /* set fcr */
2713         outb(cval, info->base + UART_LCR);
2714
2715         return ret;
2716 }
2717
2718
2719 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2720 {
2721         int quot = 0;
2722         unsigned char cval;
2723         int ret = 0;
2724         unsigned long flags;
2725
2726         if (!info->tty || !info->tty->termios)
2727                 return ret;
2728
2729         if (!(info->base))
2730                 return ret;
2731
2732         if (newspd > info->MaxCanSetBaudRate)
2733                 return 0;
2734
2735         info->realbaud = newspd;
2736         if (newspd == 134) {
2737                 quot = (2 * info->baud_base / 269);
2738         } else if (newspd) {
2739                 quot = info->baud_base / newspd;
2740                 if (quot == 0)
2741                         quot = 1;
2742         } else {
2743                 quot = 0;
2744         }
2745
2746         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2747         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2748
2749         if (quot) {
2750                 spin_lock_irqsave(&info->slock, flags);
2751                 info->MCR |= UART_MCR_DTR;
2752                 outb(info->MCR, info->base + UART_MCR);
2753                 spin_unlock_irqrestore(&info->slock, flags);
2754         } else {
2755                 spin_lock_irqsave(&info->slock, flags);
2756                 info->MCR &= ~UART_MCR_DTR;
2757                 outb(info->MCR, info->base + UART_MCR);
2758                 spin_unlock_irqrestore(&info->slock, flags);
2759                 return ret;
2760         }
2761
2762         cval = inb(info->base + UART_LCR);
2763
2764         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2765
2766         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2767         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2768         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2769
2770
2771         return ret;
2772 }
2773
2774 /*
2775  * ------------------------------------------------------------
2776  * friends of mxser_ioctl()
2777  * ------------------------------------------------------------
2778  */
2779 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2780 {
2781         struct serial_struct tmp;
2782
2783         if (!retinfo)
2784                 return -EFAULT;
2785         memset(&tmp, 0, sizeof(tmp));
2786         tmp.type = info->type;
2787         tmp.line = info->port;
2788         tmp.port = info->base;
2789         tmp.irq = info->irq;
2790         tmp.flags = info->flags;
2791         tmp.baud_base = info->baud_base;
2792         tmp.close_delay = info->close_delay;
2793         tmp.closing_wait = info->closing_wait;
2794         tmp.custom_divisor = info->custom_divisor;
2795         tmp.hub6 = 0;
2796         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2797                 return -EFAULT;
2798         return 0;
2799 }
2800
2801 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2802 {
2803         struct serial_struct new_serial;
2804         unsigned int flags;
2805         int retval = 0;
2806
2807         if (!new_info || !info->base)
2808                 return -EFAULT;
2809         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2810                 return -EFAULT;
2811
2812         if ((new_serial.irq != info->irq) ||
2813                         (new_serial.port != info->base) ||
2814                         (new_serial.custom_divisor != info->custom_divisor) ||
2815                         (new_serial.baud_base != info->baud_base))
2816                 return -EPERM;
2817
2818         flags = info->flags & ASYNC_SPD_MASK;
2819
2820         if (!capable(CAP_SYS_ADMIN)) {
2821                 if ((new_serial.baud_base != info->baud_base) ||
2822                                 (new_serial.close_delay != info->close_delay) ||
2823                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2824                         return -EPERM;
2825                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2826                                 (new_serial.flags & ASYNC_USR_MASK));
2827         } else {
2828                 /*
2829                  * OK, past this point, all the error checking has been done.
2830                  * At this point, we start making changes.....
2831                  */
2832                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2833                                 (new_serial.flags & ASYNC_FLAGS));
2834                 info->close_delay = new_serial.close_delay * HZ / 100;
2835                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2836                 info->tty->low_latency =
2837                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2838                 info->tty->low_latency = 0;     /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2839         }
2840
2841         /* added by casper, 3/17/2000, for mouse */
2842         info->type = new_serial.type;
2843
2844         process_txrx_fifo(info);
2845
2846         if (info->flags & ASYNC_INITIALIZED) {
2847                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2848                         mxser_change_speed(info, NULL);
2849                 }
2850         } else {
2851                 retval = mxser_startup(info);
2852         }
2853         return retval;
2854 }
2855
2856 /*
2857  * mxser_get_lsr_info - get line status register info
2858  *
2859  * Purpose: Let user call ioctl() to get info when the UART physically
2860  *          is emptied.  On bus types like RS485, the transmitter must
2861  *          release the bus after transmitting. This must be done when
2862  *          the transmit shift register is empty, not be done when the
2863  *          transmit holding register is empty.  This functionality
2864  *          allows an RS485 driver to be written in user space.
2865  */
2866 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2867 {
2868         unsigned char status;
2869         unsigned int result;
2870         unsigned long flags;
2871
2872         spin_lock_irqsave(&info->slock, flags);
2873         status = inb(info->base + UART_LSR);
2874         spin_unlock_irqrestore(&info->slock, flags);
2875         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2876         return put_user(result, value);
2877 }
2878
2879 /*
2880  * This routine sends a break character out the serial port.
2881  */
2882 static void mxser_send_break(struct mxser_struct *info, int duration)
2883 {
2884         unsigned long flags;
2885
2886         if (!info->base)
2887                 return;
2888         set_current_state(TASK_INTERRUPTIBLE);
2889         spin_lock_irqsave(&info->slock, flags);
2890         outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2891                 info->base + UART_LCR);
2892         spin_unlock_irqrestore(&info->slock, flags);
2893         schedule_timeout(duration);
2894         spin_lock_irqsave(&info->slock, flags);
2895         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2896                 info->base + UART_LCR);
2897         spin_unlock_irqrestore(&info->slock, flags);
2898 }
2899
2900 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2901 {
2902         struct mxser_struct *info = tty->driver_data;
2903         unsigned char control, status;
2904         unsigned long flags;
2905
2906
2907         if (tty->index == MXSER_PORTS)
2908                 return -ENOIOCTLCMD;
2909         if (tty->flags & (1 << TTY_IO_ERROR))
2910                 return -EIO;
2911
2912         control = info->MCR;
2913
2914         spin_lock_irqsave(&info->slock, flags);
2915         status = inb(info->base + UART_MSR);
2916         if (status & UART_MSR_ANY_DELTA)
2917                 mxser_check_modem_status(info, status);
2918         spin_unlock_irqrestore(&info->slock, flags);
2919         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2920                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2921                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2922                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2923                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2924                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2925 }
2926
2927 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2928 {
2929         struct mxser_struct *info = tty->driver_data;
2930         unsigned long flags;
2931
2932
2933         if (tty->index == MXSER_PORTS)
2934                 return -ENOIOCTLCMD;
2935         if (tty->flags & (1 << TTY_IO_ERROR))
2936                 return -EIO;
2937
2938         spin_lock_irqsave(&info->slock, flags);
2939
2940         if (set & TIOCM_RTS)
2941                 info->MCR |= UART_MCR_RTS;
2942         if (set & TIOCM_DTR)
2943                 info->MCR |= UART_MCR_DTR;
2944
2945         if (clear & TIOCM_RTS)
2946                 info->MCR &= ~UART_MCR_RTS;
2947         if (clear & TIOCM_DTR)
2948                 info->MCR &= ~UART_MCR_DTR;
2949
2950         outb(info->MCR, info->base + UART_MCR);
2951         spin_unlock_irqrestore(&info->slock, flags);
2952         return 0;
2953 }
2954
2955
2956 static int mxser_read_register(int, unsigned short *);
2957 static int mxser_program_mode(int);
2958 static void mxser_normal_mode(int);
2959
2960 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2961 {
2962         int id, i, bits;
2963         unsigned short regs[16], irq;
2964         unsigned char scratch, scratch2;
2965
2966         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2967
2968         id = mxser_read_register(cap, regs);
2969         if (id == C168_ASIC_ID) {
2970                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2971                 hwconf->ports = 8;
2972         } else if (id == C104_ASIC_ID) {
2973                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2974                 hwconf->ports = 4;
2975         } else if (id == C102_ASIC_ID) {
2976                 hwconf->board_type = MXSER_BOARD_C102_ISA;
2977                 hwconf->ports = 2;
2978         } else if (id == CI132_ASIC_ID) {
2979                 hwconf->board_type = MXSER_BOARD_CI132;
2980                 hwconf->ports = 2;
2981         } else if (id == CI134_ASIC_ID) {
2982                 hwconf->board_type = MXSER_BOARD_CI134;
2983                 hwconf->ports = 4;
2984         } else if (id == CI104J_ASIC_ID) {
2985                 hwconf->board_type = MXSER_BOARD_CI104J;
2986                 hwconf->ports = 4;
2987         } else
2988                 return 0;
2989
2990         irq = 0;
2991         if (hwconf->ports == 2) {
2992                 irq = regs[9] & 0xF000;
2993                 irq = irq | (irq >> 4);
2994                 if (irq != (regs[9] & 0xFF00))
2995                         return MXSER_ERR_IRQ_CONFLIT;
2996         } else if (hwconf->ports == 4) {
2997                 irq = regs[9] & 0xF000;
2998                 irq = irq | (irq >> 4);
2999                 irq = irq | (irq >> 8);
3000                 if (irq != regs[9])
3001                         return MXSER_ERR_IRQ_CONFLIT;
3002         } else if (hwconf->ports == 8) {
3003                 irq = regs[9] & 0xF000;
3004                 irq = irq | (irq >> 4);
3005                 irq = irq | (irq >> 8);
3006                 if ((irq != regs[9]) || (irq != regs[10]))
3007                         return MXSER_ERR_IRQ_CONFLIT;
3008         }
3009
3010         if (!irq)
3011                 return MXSER_ERR_IRQ;
3012         hwconf->irq = ((int)(irq & 0xF000) >> 12);
3013         for (i = 0; i < 8; i++)
3014                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3015         if ((regs[12] & 0x80) == 0)
3016                 return MXSER_ERR_VECTOR;
3017         hwconf->vector = (int)regs[11]; /* interrupt vector */
3018         if (id == 1)
3019                 hwconf->vector_mask = 0x00FF;
3020         else
3021                 hwconf->vector_mask = 0x000F;
3022         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3023                 if (regs[12] & bits) {
3024                         hwconf->baud_base[i] = 921600;
3025                         hwconf->MaxCanSetBaudRate[i] = 921600;  /* add by Victor Yu. 09-04-2002 */
3026                 } else {
3027                         hwconf->baud_base[i] = 115200;
3028                         hwconf->MaxCanSetBaudRate[i] = 115200;  /* add by Victor Yu. 09-04-2002 */
3029                 }
3030         }
3031         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3032         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3033         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3034         outb(scratch2, cap + UART_LCR);
3035         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3036         scratch = inb(cap + UART_IIR);
3037
3038         if (scratch & 0xC0)
3039                 hwconf->uart_type = PORT_16550A;
3040         else
3041                 hwconf->uart_type = PORT_16450;
3042         if (id == 1)
3043                 hwconf->ports = 8;
3044         else
3045                 hwconf->ports = 4;
3046         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3047         request_region(hwconf->vector, 1, "mxser(vector)");
3048         return hwconf->ports;
3049 }
3050
3051 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3052 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3053 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3054 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3055 #define EN_CCMD         0x000   /* Chip's command register     */
3056 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3057 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3058 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3059 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3060 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3061 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3062 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3063 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3064 static int mxser_read_register(int port, unsigned short *regs)
3065 {
3066         int i, k, value, id;
3067         unsigned int j;
3068
3069         id = mxser_program_mode(port);
3070         if (id < 0)
3071                 return id;
3072         for (i = 0; i < 14; i++) {
3073                 k = (i & 0x3F) | 0x180;
3074                 for (j = 0x100; j > 0; j >>= 1) {
3075                         outb(CHIP_CS, port);
3076                         if (k & j) {
3077                                 outb(CHIP_CS | CHIP_DO, port);
3078                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3079                         } else {
3080                                 outb(CHIP_CS, port);
3081                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3082                         }
3083                 }
3084                 (void)inb(port);
3085                 value = 0;
3086                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3087                         outb(CHIP_CS, port);
3088                         outb(CHIP_CS | CHIP_SK, port);
3089                         if (inb(port) & CHIP_DI)
3090                                 value |= j;
3091                 }
3092                 regs[i] = value;
3093                 outb(0, port);
3094         }
3095         mxser_normal_mode(port);
3096         return id;
3097 }
3098
3099 static int mxser_program_mode(int port)
3100 {
3101         int id, i, j, n;
3102         /* unsigned long flags; */
3103
3104         spin_lock(&gm_lock);
3105         outb(0, port);
3106         outb(0, port);
3107         outb(0, port);
3108         (void)inb(port);
3109         (void)inb(port);
3110         outb(0, port);
3111         (void)inb(port);
3112         /* restore_flags(flags); */
3113         spin_unlock(&gm_lock);
3114
3115         id = inb(port + 1) & 0x1F;
3116         if ((id != C168_ASIC_ID) &&
3117                         (id != C104_ASIC_ID) &&
3118                         (id != C102_ASIC_ID) &&
3119                         (id != CI132_ASIC_ID) &&
3120                         (id != CI134_ASIC_ID) &&
3121                         (id != CI104J_ASIC_ID))
3122                 return -1;
3123         for (i = 0, j = 0; i < 4; i++) {
3124                 n = inb(port + 2);
3125                 if (n == 'M') {
3126                         j = 1;
3127                 } else if ((j == 1) && (n == 1)) {
3128                         j = 2;
3129                         break;
3130                 } else
3131                         j = 0;
3132         }
3133         if (j != 2)
3134                 id = -2;
3135         return id;
3136 }
3137
3138 static void mxser_normal_mode(int port)
3139 {
3140         int i, n;
3141
3142         outb(0xA5, port + 1);
3143         outb(0x80, port + 3);
3144         outb(12, port + 0);     /* 9600 bps */
3145         outb(0, port + 1);
3146         outb(0x03, port + 3);   /* 8 data bits */
3147         outb(0x13, port + 4);   /* loop back mode */
3148         for (i = 0; i < 16; i++) {
3149                 n = inb(port + 5);
3150                 if ((n & 0x61) == 0x60)
3151                         break;
3152                 if ((n & 1) == 1)
3153                         (void)inb(port);
3154         }
3155         outb(0x00, port + 4);
3156 }
3157
3158 module_init(mxser_module_init);
3159 module_exit(mxser_module_exit);