err.no Git - linux-2.6/blob - 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/errno.h>
  41 #include <linux/signal.h>
  42 #include <linux/sched.h>
  43 #include <linux/timer.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/tty.h>
  46 #include <linux/tty_flip.h>
  47 #include <linux/serial.h>
  48 #include <linux/serial_reg.h>
  49 #include <linux/major.h>
  50 #include <linux/string.h>
  51 #include <linux/fcntl.h>
  52 #include <linux/ptrace.h>
  53 #include <linux/gfp.h>
  54 #include <linux/ioport.h>
  55 #include <linux/mm.h>
  56 #include <linux/delay.h>
  57 #include <linux/pci.h>
  58 #include <linux/bitops.h>
  59
  60 #include <asm/system.h>
  61 #include <asm/io.h>
  62 #include <asm/irq.h>
  63 #include <asm/uaccess.h>
  64
  65 #include "mxser.h"
  66
  67 #define MXSER_VERSION   "1.8"
  68 #define MXSERMAJOR       174
  69 #define MXSERCUMAJOR     175
  70
  71 #define MXSER_EVENT_TXLOW       1
  72 #define MXSER_EVENT_HANGUP      2
  73
  74 #define MXSER_BOARDS            4       /* Max. boards */
  75 #define MXSER_PORTS             32      /* Max. ports */
  76 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  77 #define MXSER_ISR_PASS_LIMIT    256
  78
  79 #define MXSER_ERR_IOADDR        -1
  80 #define MXSER_ERR_IRQ           -2
  81 #define MXSER_ERR_IRQ_CONFLIT   -3
  82 #define MXSER_ERR_VECTOR        -4
  83
  84 #define WAKEUP_CHARS            256
  85
  86 #define UART_MCR_AFE            0x20
  87 #define UART_LSR_SPECIAL        0x1E
  88
  89
  90 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
  91
  92 #define C168_ASIC_ID    1
  93 #define C104_ASIC_ID    2
  94 #define C102_ASIC_ID    0xB
  95 #define CI132_ASIC_ID   4
  96 #define CI134_ASIC_ID   3
  97 #define CI104J_ASIC_ID  5
  98
  99 enum {
 100         MXSER_BOARD_C168_ISA = 1,
 101         MXSER_BOARD_C104_ISA,
 102         MXSER_BOARD_CI104J,
 103         MXSER_BOARD_C168_PCI,
 104         MXSER_BOARD_C104_PCI,
 105         MXSER_BOARD_C102_ISA,
 106         MXSER_BOARD_CI132,
 107         MXSER_BOARD_CI134,
 108         MXSER_BOARD_CP132,
 109         MXSER_BOARD_CP114,
 110         MXSER_BOARD_CT114,
 111         MXSER_BOARD_CP102,
 112         MXSER_BOARD_CP104U,
 113         MXSER_BOARD_CP168U,
 114         MXSER_BOARD_CP132U,
 115         MXSER_BOARD_CP134U,
 116         MXSER_BOARD_CP104JU,
 117         MXSER_BOARD_RC7000,
 118         MXSER_BOARD_CP118U,
 119         MXSER_BOARD_CP102UL,
 120         MXSER_BOARD_CP102U,
 121 };
 122
 123 static char *mxser_brdname[] = {
 124         "C168 series",
 125         "C104 series",
 126         "CI-104J series",
 127         "C168H/PCI series",
 128         "C104H/PCI series",
 129         "C102 series",
 130         "CI-132 series",
 131         "CI-134 series",
 132         "CP-132 series",
 133         "CP-114 series",
 134         "CT-114 series",
 135         "CP-102 series",
 136         "CP-104U series",
 137         "CP-168U series",
 138         "CP-132U series",
 139         "CP-134U series",
 140         "CP-104JU series",
 141         "Moxa UC7000 Serial",
 142         "CP-118U series",
 143         "CP-102UL series",
 144         "CP-102U series",
 145 };
 146
 147 static int mxser_numports[] = {
 148         8,                      /* C168-ISA */
 149         4,                      /* C104-ISA */
 150         4,                      /* CI104J */
 151         8,                      /* C168-PCI */
 152         4,                      /* C104-PCI */
 153         2,                      /* C102-ISA */
 154         2,                      /* CI132 */
 155         4,                      /* CI134 */
 156         2,                      /* CP132 */
 157         4,                      /* CP114 */
 158         4,                      /* CT114 */
 159         2,                      /* CP102 */
 160         4,                      /* CP104U */
 161         8,                      /* CP168U */
 162         2,                      /* CP132U */
 163         4,                      /* CP134U */
 164         4,                      /* CP104JU */
 165         8,                      /* RC7000 */
 166         8,                      /* CP118U */
 167         2,                      /* CP102UL */
 168         2,                      /* CP102U */
 169 };
 170
 171 #define UART_TYPE_NUM   2
 172
 173 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 174         MOXA_MUST_MU150_HWID,
 175         MOXA_MUST_MU860_HWID
 176 };
 177
 178 /* This is only for PCI */
 179 #define UART_INFO_NUM   3
 180 struct mxpciuart_info {
 181         int type;
 182         int tx_fifo;
 183         int rx_fifo;
 184         int xmit_fifo_size;
 185         int rx_high_water;
 186         int rx_trigger;
 187         int rx_low_water;
 188         long max_baud;
 189 };
 190
 191 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 192         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 193         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 194         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 195 };
 196
 197
 198 #ifdef CONFIG_PCI
 199
 200 static struct pci_device_id mxser_pcibrds[] = {
 201         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 202         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 203         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 204         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 205         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 206         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 207         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 208         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 216         {0}
 217 };
 218
 219 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 220
 221
 222 #endif
 223
 224 typedef struct _moxa_pci_info {
 225         unsigned short busNum;
 226         unsigned short devNum;
 227         struct pci_dev *pdev;   /* add by Victor Yu. 06-23-2003 */
 228 } moxa_pci_info;
 229
 230 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 231 static int ttymajor = MXSERMAJOR;
 232 static int calloutmajor = MXSERCUMAJOR;
 233 static int verbose = 0;
 234
 235 /* Variables for insmod */
 236
 237 MODULE_AUTHOR("Casper Yang");
 238 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 239 module_param_array(ioaddr, int, NULL, 0);
 240 module_param(ttymajor, int, 0);
 241 module_param(calloutmajor, int, 0);
 242 module_param(verbose, bool, 0);
 243 MODULE_LICENSE("GPL");
 244
 245 struct mxser_log {
 246         int tick;
 247         unsigned long rxcnt[MXSER_PORTS];
 248         unsigned long txcnt[MXSER_PORTS];
 249 };
 250
 251
 252 struct mxser_mon {
 253         unsigned long rxcnt;
 254         unsigned long txcnt;
 255         unsigned long up_rxcnt;
 256         unsigned long up_txcnt;
 257         int modem_status;
 258         unsigned char hold_reason;
 259 };
 260
 261 struct mxser_mon_ext {
 262         unsigned long rx_cnt[32];
 263         unsigned long tx_cnt[32];
 264         unsigned long up_rxcnt[32];
 265         unsigned long up_txcnt[32];
 266         int modem_status[32];
 267
 268         long baudrate[32];
 269         int databits[32];
 270         int stopbits[32];
 271         int parity[32];
 272         int flowctrl[32];
 273         int fifo[32];
 274         int iftype[32];
 275 };
 276
 277 struct mxser_hwconf {
 278         int board_type;
 279         int ports;
 280         int irq;
 281         int vector;
 282         int vector_mask;
 283         int uart_type;
 284         int ioaddr[MXSER_PORTS_PER_BOARD];
 285         int baud_base[MXSER_PORTS_PER_BOARD];
 286         moxa_pci_info pciInfo;
 287         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 288         int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];   /* add by Victor Yu. 09-04-2002 */
 289         int opmode_ioaddr[MXSER_PORTS_PER_BOARD];       /* add by Victor Yu. 01-05-2004 */
 290 };
 291
 292 struct mxser_struct {
 293         int port;
 294         int base;               /* port base address */
 295         int irq;                /* port using irq no. */
 296         int vector;             /* port irq vector */
 297         int vectormask;         /* port vector mask */
 298         int rx_high_water;
 299         int rx_trigger;         /* Rx fifo trigger level */
 300         int rx_low_water;
 301         int baud_base;          /* max. speed */
 302         int flags;              /* defined in tty.h */
 303         int type;               /* UART type */
 304         struct tty_struct *tty;
 305         int read_status_mask;
 306         int ignore_status_mask;
 307         int xmit_fifo_size;
 308         int custom_divisor;
 309         int x_char;             /* xon/xoff character */
 310         int close_delay;
 311         unsigned short closing_wait;
 312         int IER;                /* Interrupt Enable Register */
 313         int MCR;                /* Modem control register */
 314         unsigned long event;
 315         int count;              /* # of fd on device */
 316         int blocked_open;       /* # of blocked opens */
 317         unsigned char *xmit_buf;
 318         int xmit_head;
 319         int xmit_tail;
 320         int xmit_cnt;
 321         struct work_struct tqueue;
 322         struct ktermios normal_termios;
 323         struct ktermios callout_termios;
 324         wait_queue_head_t open_wait;
 325         wait_queue_head_t close_wait;
 326         wait_queue_head_t delta_msr_wait;
 327         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 328         int timeout;
 329         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 330         int MaxCanSetBaudRate;  /* add by Victor Yu. 09-04-2002 */
 331         int opmode_ioaddr;      /* add by Victor Yu. 01-05-2004 */
 332         unsigned char stop_rx;
 333         unsigned char ldisc_stop_rx;
 334         long realbaud;
 335         struct mxser_mon mon_data;
 336         unsigned char err_shadow;
 337         spinlock_t slock;
 338 };
 339
 340 struct mxser_mstatus {
 341         tcflag_t cflag;
 342         int cts;
 343         int dsr;
 344         int ri;
 345         int dcd;
 346 };
 347
 348 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 349
 350 static int mxserBoardCAP[MXSER_BOARDS] = {
 351         0, 0, 0, 0
 352         /*  0x180, 0x280, 0x200, 0x320 */
 353 };
 354
 355 static struct tty_driver *mxvar_sdriver;
 356 static struct mxser_struct mxvar_table[MXSER_PORTS];
 357 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 358 static struct ktermios *mxvar_termios[MXSER_PORTS + 1];
 359 static struct ktermios *mxvar_termios_locked[MXSER_PORTS + 1];
 360 static struct mxser_log mxvar_log;
 361 static int mxvar_diagflag;
 362 static unsigned char mxser_msr[MXSER_PORTS + 1];
 363 static struct mxser_mon_ext mon_data_ext;
 364 static int mxser_set_baud_method[MXSER_PORTS + 1];
 365 static spinlock_t gm_lock;
 366
 367 /*
 368  * This is used to figure out the divisor speeds and the timeouts
 369  */
 370
 371 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 372
 373 /*
 374  * static functions:
 375  */
 376
 377 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 378 static int mxser_init(void);
 379
 380 /* static void   mxser_poll(unsigned long); */
 381 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 382 static void mxser_do_softint(struct work_struct *);
 383 static int mxser_open(struct tty_struct *, struct file *);
 384 static void mxser_close(struct tty_struct *, struct file *);
 385 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 386 static int mxser_write_room(struct tty_struct *);
 387 static void mxser_flush_buffer(struct tty_struct *);
 388 static int mxser_chars_in_buffer(struct tty_struct *);
 389 static void mxser_flush_chars(struct tty_struct *);
 390 static void mxser_put_char(struct tty_struct *, unsigned char);
 391 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 392 static int mxser_ioctl_special(unsigned int, void __user *);
 393 static void mxser_throttle(struct tty_struct *);
 394 static void mxser_unthrottle(struct tty_struct *);
 395 static void mxser_set_termios(struct tty_struct *, struct ktermios *);
 396 static void mxser_stop(struct tty_struct *);
 397 static void mxser_start(struct tty_struct *);
 398 static void mxser_hangup(struct tty_struct *);
 399 static void mxser_rs_break(struct tty_struct *, int);
 400 static irqreturn_t mxser_interrupt(int, void *);
 401 static void mxser_receive_chars(struct mxser_struct *, int *);
 402 static void mxser_transmit_chars(struct mxser_struct *);
 403 static void mxser_check_modem_status(struct mxser_struct *, int);
 404 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 405 static int mxser_startup(struct mxser_struct *);
 406 static void mxser_shutdown(struct mxser_struct *);
 407 static int mxser_change_speed(struct mxser_struct *, struct ktermios *old_termios);
 408 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 409 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 410 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 411 static void mxser_send_break(struct mxser_struct *, int);
 412 static int mxser_tiocmget(struct tty_struct *, struct file *);
 413 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 414 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 415 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 416
 417 static void mxser_startrx(struct tty_struct *tty);
 418 static void mxser_stoprx(struct tty_struct *tty);
 419
 420 #ifdef CONFIG_PCI
 421 static int CheckIsMoxaMust(int io)
 422 {
 423         u8 oldmcr, hwid;
 424         int i;
 425
 426         outb(0, io + UART_LCR);
 427         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 428         oldmcr = inb(io + UART_MCR);
 429         outb(0, io + UART_MCR);
 430         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 431         if ((hwid = inb(io + UART_MCR)) != 0) {
 432                 outb(oldmcr, io + UART_MCR);
 433                 return MOXA_OTHER_UART;
 434         }
 435
 436         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 437         for (i = 0; i < UART_TYPE_NUM; i++) {
 438                 if (hwid == Gmoxa_uart_id[i])
 439                         return (int)hwid;
 440         }
 441         return MOXA_OTHER_UART;
 442 }
 443 #endif
 444
 445 /* above is modified by Victor Yu. 08-15-2002 */
 446
 447 static const struct tty_operations mxser_ops = {
 448         .open = mxser_open,
 449         .close = mxser_close,
 450         .write = mxser_write,
 451         .put_char = mxser_put_char,
 452         .flush_chars = mxser_flush_chars,
 453         .write_room = mxser_write_room,
 454         .chars_in_buffer = mxser_chars_in_buffer,
 455         .flush_buffer = mxser_flush_buffer,
 456         .ioctl = mxser_ioctl,
 457         .throttle = mxser_throttle,
 458         .unthrottle = mxser_unthrottle,
 459         .set_termios = mxser_set_termios,
 460         .stop = mxser_stop,
 461         .start = mxser_start,
 462         .hangup = mxser_hangup,
 463         .break_ctl = mxser_rs_break,
 464         .wait_until_sent = mxser_wait_until_sent,
 465         .tiocmget = mxser_tiocmget,
 466         .tiocmset = mxser_tiocmset,
 467 };
 468
 469 /*
 470  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 471  */
 472
 473 static int __init mxser_module_init(void)
 474 {
 475         int ret;
 476
 477         if (verbose)
 478                 printk(KERN_DEBUG "Loading module mxser ...\n");
 479         ret = mxser_init();
 480         if (verbose)
 481                 printk(KERN_DEBUG "Done.\n");
 482         return ret;
 483 }
 484
 485 static void __exit mxser_module_exit(void)
 486 {
 487         int i, err;
 488
 489         if (verbose)
 490                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 491
 492         err = tty_unregister_driver(mxvar_sdriver);
 493         if (!err)
 494                 put_tty_driver(mxvar_sdriver);
 495         else
 496                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 497
 498         for (i = 0; i < MXSER_BOARDS; i++) {
 499                 struct pci_dev *pdev;
 500
 501                 if (mxsercfg[i].board_type == -1)
 502                         continue;
 503                 else {
 504                         pdev = mxsercfg[i].pciInfo.pdev;
 505                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 506                         if (pdev != NULL) {     /* PCI */
 507                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 508                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 509                                 pci_dev_put(pdev);
 510                         } else {
 511                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 512                                 release_region(mxsercfg[i].vector, 1);
 513                         }
 514                 }
 515         }
 516         if (verbose)
 517                 printk(KERN_DEBUG "Done.\n");
 518 }
 519
 520 static void process_txrx_fifo(struct mxser_struct *info)
 521 {
 522         int i;
 523
 524         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 525                 info->rx_trigger = 1;
 526                 info->rx_high_water = 1;
 527                 info->rx_low_water = 1;
 528                 info->xmit_fifo_size = 1;
 529         } else {
 530                 for (i = 0; i < UART_INFO_NUM; i++) {
 531                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 532                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 533                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 534                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 535                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 536                                 break;
 537                         }
 538                 }
 539         }
 540 }
 541
 542 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 543 {
 544         struct mxser_struct *info;
 545         int retval;
 546         int i, n;
 547
 548         n = board * MXSER_PORTS_PER_BOARD;
 549         info = &mxvar_table[n];
 550         /*if (verbose) */  {
 551                 printk(KERN_DEBUG "        ttyMI%d - ttyMI%d ",
 552                         n, n + hwconf->ports - 1);
 553                 printk(" max. baud rate = %d bps.\n",
 554                         hwconf->MaxCanSetBaudRate[0]);
 555         }
 556
 557         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 558                 info->port = n;
 559                 info->base = hwconf->ioaddr[i];
 560                 info->irq = hwconf->irq;
 561                 info->vector = hwconf->vector;
 562                 info->vectormask = hwconf->vector_mask;
 563                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
 564                 info->stop_rx = 0;
 565                 info->ldisc_stop_rx = 0;
 566
 567                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 568                 /* Enhance mode enabled here */
 569                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 570                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 571                 }
 572
 573                 info->flags = ASYNC_SHARE_IRQ;
 574                 info->type = hwconf->uart_type;
 575                 info->baud_base = hwconf->baud_base[i];
 576
 577                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 578
 579                 process_txrx_fifo(info);
 580
 581
 582                 info->custom_divisor = hwconf->baud_base[i] * 16;
 583                 info->close_delay = 5 * HZ / 10;
 584                 info->closing_wait = 30 * HZ;
 585                 INIT_WORK(&info->tqueue, mxser_do_softint);
 586                 info->normal_termios = mxvar_sdriver->init_termios;
 587                 init_waitqueue_head(&info->open_wait);
 588                 init_waitqueue_head(&info->close_wait);
 589                 init_waitqueue_head(&info->delta_msr_wait);
 590                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 591                 info->err_shadow = 0;
 592                 spin_lock_init(&info->slock);
 593         }
 594         /*
 595          * Allocate the IRQ if necessary
 596          */
 597
 598
 599         /* before set INT ISR, disable all int */
 600         for (i = 0; i < hwconf->ports; i++) {
 601                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
 602                         hwconf->ioaddr[i] + UART_IER);
 603         }
 604
 605         n = board * MXSER_PORTS_PER_BOARD;
 606         info = &mxvar_table[n];
 607
 608         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
 609                                 "mxser", info);
 610         if (retval) {
 611                 printk(KERN_ERR "Board %d: %s",
 612                         board, mxser_brdname[hwconf->board_type - 1]);
 613                 printk("  Request irq failed, IRQ (%d) may conflict with"
 614                         " another device.\n", info->irq);
 615                 return retval;
 616         }
 617         return 0;
 618 }
 619
 620 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 621 {
 622         mxsercfg[board] = *hwconf;
 623 }
 624
 625 #ifdef CONFIG_PCI
 626 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 627 {
 628         int i, j;
 629         /* unsigned int val; */
 630         unsigned int ioaddress;
 631         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 632
 633         /* io address */
 634         hwconf->board_type = board_type;
 635         hwconf->ports = mxser_numports[board_type - 1];
 636         ioaddress = pci_resource_start(pdev, 2);
 637         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
 638                         "mxser(IO)");
 639
 640         for (i = 0; i < hwconf->ports; i++)
 641                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 642
 643         /* vector */
 644         ioaddress = pci_resource_start(pdev, 3);
 645         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
 646                         "mxser(vector)");
 647         hwconf->vector = ioaddress;
 648
 649         /* irq */
 650         hwconf->irq = hwconf->pciInfo.pdev->irq;
 651
 652         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 653         hwconf->uart_type = PORT_16550A;
 654         hwconf->vector_mask = 0;
 655
 656
 657         for (i = 0; i < hwconf->ports; i++) {
 658                 for (j = 0; j < UART_INFO_NUM; j++) {
 659                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 660                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 661
 662                                 /* exception....CP-102 */
 663                                 if (board_type == MXSER_BOARD_CP102)
 664                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 665                                 break;
 666                         }
 667                 }
 668         }
 669
 670         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 671                 for (i = 0; i < hwconf->ports; i++) {
 672                         if (i < 4)
 673                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 674                         else
 675                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 676                 }
 677                 outb(0, ioaddress + 4); /* default set to RS232 mode */
 678                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
 679         }
 680
 681         for (i = 0; i < hwconf->ports; i++) {
 682                 hwconf->vector_mask |= (1 << i);
 683                 hwconf->baud_base[i] = 921600;
 684         }
 685         return 0;
 686 }
 687 #endif
 688
 689 static int mxser_init(void)
 690 {
 691         int i, m, retval, b, n;
 692         struct pci_dev *pdev = NULL;
 693         int index;
 694         unsigned char busnum, devnum;
 695         struct mxser_hwconf hwconf;
 696
 697         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 698         if (!mxvar_sdriver)
 699                 return -ENOMEM;
 700         spin_lock_init(&gm_lock);
 701
 702         for (i = 0; i < MXSER_BOARDS; i++) {
 703                 mxsercfg[i].board_type = -1;
 704         }
 705
 706         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
 707                 MXSER_VERSION);
 708
 709         /* Initialize the tty_driver structure */
 710         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 711         mxvar_sdriver->owner = THIS_MODULE;
 712         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 713         mxvar_sdriver->name = "ttyMI";
 714         mxvar_sdriver->major = ttymajor;
 715         mxvar_sdriver->minor_start = 0;
 716         mxvar_sdriver->num = MXSER_PORTS + 1;
 717         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 718         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 719         mxvar_sdriver->init_termios = tty_std_termios;
 720         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 721         mxvar_sdriver->init_termios.c_ispeed = 9600;
 722         mxvar_sdriver->init_termios.c_ospeed = 9600;
 723         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 724         tty_set_operations(mxvar_sdriver, &mxser_ops);
 725         mxvar_sdriver->ttys = mxvar_tty;
 726         mxvar_sdriver->termios = mxvar_termios;
 727         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 728
 729         mxvar_diagflag = 0;
 730         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 731         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 732
 733         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 734         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 735         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 736         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 737
 738         m = 0;
 739         /* Start finding ISA boards here */
 740         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 741                 int cap;
 742
 743                 if (!(cap = mxserBoardCAP[b]))
 744                         continue;
 745
 746                 retval = mxser_get_ISA_conf(cap, &hwconf);
 747
 748                 if (retval != 0)
 749                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 750                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 751
 752                 if (retval <= 0) {
 753                         if (retval == MXSER_ERR_IRQ)
 754                                 printk(KERN_ERR "Invalid interrupt number, "
 755                                         "board not configured\n");
 756                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 757                                 printk(KERN_ERR "Invalid interrupt number, "
 758                                         "board not configured\n");
 759                         else if (retval == MXSER_ERR_VECTOR)
 760                                 printk(KERN_ERR "Invalid interrupt vector, "
 761                                         "board not configured\n");
 762                         else if (retval == MXSER_ERR_IOADDR)
 763                                 printk(KERN_ERR "Invalid I/O address, "
 764                                         "board not configured\n");
 765
 766                         continue;
 767                 }
 768
 769                 hwconf.pciInfo.busNum = 0;
 770                 hwconf.pciInfo.devNum = 0;
 771                 hwconf.pciInfo.pdev = NULL;
 772
 773                 mxser_getcfg(m, &hwconf);
 774                 /*
 775                  * init mxsercfg first,
 776                  * or mxsercfg data is not correct on ISR.
 777                  */
 778                 /* mxser_initbrd will hook ISR. */
 779                 if (mxser_initbrd(m, &hwconf) < 0)
 780                         continue;
 781
 782                 m++;
 783         }
 784
 785         /* Start finding ISA boards from module arg */
 786         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 787                 int cap;
 788
 789                 if (!(cap = ioaddr[b]))
 790                         continue;
 791
 792                 retval = mxser_get_ISA_conf(cap, &hwconf);
 793
 794                 if (retval != 0)
 795                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 796                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 797
 798                 if (retval <= 0) {
 799                         if (retval == MXSER_ERR_IRQ)
 800                                 printk(KERN_ERR "Invalid interrupt number, "
 801                                         "board not configured\n");
 802                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 803                                 printk(KERN_ERR "Invalid interrupt number, "
 804                                         "board not configured\n");
 805                         else if (retval == MXSER_ERR_VECTOR)
 806                                 printk(KERN_ERR "Invalid interrupt vector, "
 807                                         "board not configured\n");
 808                         else if (retval == MXSER_ERR_IOADDR)
 809                                 printk(KERN_ERR "Invalid I/O address, "
 810                                         "board not configured\n");
 811
 812                         continue;
 813                 }
 814
 815                 hwconf.pciInfo.busNum = 0;
 816                 hwconf.pciInfo.devNum = 0;
 817                 hwconf.pciInfo.pdev = NULL;
 818
 819                 mxser_getcfg(m, &hwconf);
 820                 /*
 821                  * init mxsercfg first,
 822                  * or mxsercfg data is not correct on ISR.
 823                  */
 824                 /* mxser_initbrd will hook ISR. */
 825                 if (mxser_initbrd(m, &hwconf) < 0)
 826                         continue;
 827
 828                 m++;
 829         }
 830
 831         /* start finding PCI board here */
 832 #ifdef CONFIG_PCI
 833         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 834         index = 0;
 835         b = 0;
 836         while (b < n) {
 837                 pdev = pci_get_device(mxser_pcibrds[b].vendor,
 838                                 mxser_pcibrds[b].device, pdev);
 839                 if (pdev == NULL) {
 840                         b++;
 841                         continue;
 842                 }
 843                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 844                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 845                 hwconf.pciInfo.pdev = pdev;
 846                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
 847                         mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
 848                         busnum, devnum >> 3);
 849                 index++;
 850                 if (m >= MXSER_BOARDS)
 851                         printk(KERN_ERR
 852                                 "Too many Smartio/Industio family boards find "
 853                                 "(maximum %d), board not configured\n",
 854                                 MXSER_BOARDS);
 855                 else {
 856                         if (pci_enable_device(pdev)) {
 857                                 printk(KERN_ERR "Moxa SmartI/O PCI enable "
 858                                         "fail !\n");
 859                                 continue;
 860                         }
 861                         retval = mxser_get_PCI_conf(busnum, devnum,
 862                                         (int)mxser_pcibrds[b].driver_data,
 863                                         &hwconf);
 864                         if (retval < 0) {
 865                                 if (retval == MXSER_ERR_IRQ)
 866                                         printk(KERN_ERR
 867                                                 "Invalid interrupt number, "
 868                                                 "board not configured\n");
 869                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 870                                         printk(KERN_ERR
 871                                                 "Invalid interrupt number, "
 872                                                 "board not configured\n");
 873                                 else if (retval == MXSER_ERR_VECTOR)
 874                                         printk(KERN_ERR
 875                                                 "Invalid interrupt vector, "
 876                                                 "board not configured\n");
 877                                 else if (retval == MXSER_ERR_IOADDR)
 878                                         printk(KERN_ERR
 879                                                 "Invalid I/O address, "
 880                                                 "board not configured\n");
 881                                 continue;
 882                         }
 883                         mxser_getcfg(m, &hwconf);
 884                         /* init mxsercfg first,
 885                          * or mxsercfg data is not correct on ISR.
 886                          */
 887                         /* mxser_initbrd will hook ISR. */
 888                         if (mxser_initbrd(m, &hwconf) < 0)
 889                                 continue;
 890                         m++;
 891                         /* Keep an extra reference if we succeeded. It will
 892                            be returned at unload time */
 893                         pci_dev_get(pdev);
 894                 }
 895         }
 896 #endif
 897
 898         retval = tty_register_driver(mxvar_sdriver);
 899         if (retval) {
 900                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
 901                                 " driver !\n");
 902                 put_tty_driver(mxvar_sdriver);
 903
 904                 for (i = 0; i < MXSER_BOARDS; i++) {
 905                         if (mxsercfg[i].board_type == -1)
 906                                 continue;
 907                         else {
 908                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 909                                 /* todo: release io, vector */
 910                         }
 911                 }
 912                 return retval;
 913         }
 914
 915         return 0;
 916 }
 917
 918 static void mxser_do_softint(struct work_struct *work)
 919 {
 920         struct mxser_struct *info =
 921                 container_of(work, struct mxser_struct, tqueue);
 922         struct tty_struct *tty;
 923
 924         tty = info->tty;
 925
 926         if (tty) {
 927                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 928                         tty_wakeup(tty);
 929                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 930                         tty_hangup(tty);
 931         }
 932 }
 933
 934 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 935 {
 936         unsigned char status = 0;
 937
 938         status = inb(baseaddr + UART_MSR);
 939
 940         mxser_msr[port] &= 0x0F;
 941         mxser_msr[port] |= status;
 942         status = mxser_msr[port];
 943         if (mode)
 944                 mxser_msr[port] = 0;
 945
 946         return status;
 947 }
 948
 949 /*
 950  * This routine is called whenever a serial port is opened.  It
 951  * enables interrupts for a serial port, linking in its async structure into
 952  * the IRQ chain.   It also performs the serial-specific
 953  * initialization for the tty structure.
 954  */
 955 static int mxser_open(struct tty_struct *tty, struct file *filp)
 956 {
 957         struct mxser_struct *info;
 958         int retval, line;
 959
 960         /* initialize driver_data in case something fails */
 961         tty->driver_data = NULL;
 962
 963         line = tty->index;
 964         if (line == MXSER_PORTS)
 965                 return 0;
 966         if (line < 0 || line > MXSER_PORTS)
 967                 return -ENODEV;
 968         info = mxvar_table + line;
 969         if (!info->base)
 970                 return -ENODEV;
 971
 972         tty->driver_data = info;
 973         info->tty = tty;
 974         /*
 975          * Start up serial port
 976          */
 977         retval = mxser_startup(info);
 978         if (retval)
 979                 return retval;
 980
 981         retval = mxser_block_til_ready(tty, filp, info);
 982         if (retval)
 983                 return retval;
 984
 985         info->count++;
 986
 987         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 988                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 989                         *tty->termios = info->normal_termios;
 990                 else
 991                         *tty->termios = info->callout_termios;
 992                 mxser_change_speed(info, NULL);
 993         }
 994
 995         /*
 996         status = mxser_get_msr(info->base, 0, info->port);
 997         mxser_check_modem_status(info, status);
 998         */
 999
1000         /* unmark here for very high baud rate (ex. 921600 bps) used */
1001         tty->low_latency = 1;
1002         return 0;
1003 }
1004
1005 /*
1006  * This routine is called when the serial port gets closed.  First, we
1007  * wait for the last remaining data to be sent.  Then, we unlink its
1008  * async structure from the interrupt chain if necessary, and we free
1009  * that IRQ if nothing is left in the chain.
1010  */
1011 static void mxser_close(struct tty_struct *tty, struct file *filp)
1012 {
1013         struct mxser_struct *info = tty->driver_data;
1014
1015         unsigned long timeout;
1016         unsigned long flags;
1017         struct tty_ldisc *ld;
1018
1019         if (tty->index == MXSER_PORTS)
1020                 return;
1021         if (!info)
1022                 return;
1023
1024         spin_lock_irqsave(&info->slock, flags);
1025
1026         if (tty_hung_up_p(filp)) {
1027                 spin_unlock_irqrestore(&info->slock, flags);
1028                 return;
1029         }
1030         if ((tty->count == 1) && (info->count != 1)) {
1031                 /*
1032                  * Uh, oh.  tty->count is 1, which means that the tty
1033                  * structure will be freed.  Info->count should always
1034                  * be one in these conditions.  If it's greater than
1035                  * one, we've got real problems, since it means the
1036                  * serial port won't be shutdown.
1037                  */
1038                 printk(KERN_ERR "mxser_close: bad serial port count; "
1039                         "tty->count is 1, info->count is %d\n", info->count);
1040                 info->count = 1;
1041         }
1042         if (--info->count < 0) {
1043                 printk(KERN_ERR "mxser_close: bad serial port count for "
1044                         "ttys%d: %d\n", info->port, info->count);
1045                 info->count = 0;
1046         }
1047         if (info->count) {
1048                 spin_unlock_irqrestore(&info->slock, flags);
1049                 return;
1050         }
1051         info->flags |= ASYNC_CLOSING;
1052         spin_unlock_irqrestore(&info->slock, flags);
1053         /*
1054          * Save the termios structure, since this port may have
1055          * separate termios for callout and dialin.
1056          */
1057         if (info->flags & ASYNC_NORMAL_ACTIVE)
1058                 info->normal_termios = *tty->termios;
1059         /*
1060          * Now we wait for the transmit buffer to clear; and we notify
1061          * the line discipline to only process XON/XOFF characters.
1062          */
1063         tty->closing = 1;
1064         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1065                 tty_wait_until_sent(tty, info->closing_wait);
1066         /*
1067          * At this point we stop accepting input.  To do this, we
1068          * disable the receive line status interrupts, and tell the
1069          * interrupt driver to stop checking the data ready bit in the
1070          * line status register.
1071          */
1072         info->IER &= ~UART_IER_RLSI;
1073         if (info->IsMoxaMustChipFlag)
1074                 info->IER &= ~MOXA_MUST_RECV_ISR;
1075 /* by William
1076         info->read_status_mask &= ~UART_LSR_DR;
1077 */
1078         if (info->flags & ASYNC_INITIALIZED) {
1079                 outb(info->IER, info->base + UART_IER);
1080                 /*
1081                  * Before we drop DTR, make sure the UART transmitter
1082                  * has completely drained; this is especially
1083                  * important if there is a transmit FIFO!
1084                  */
1085                 timeout = jiffies + HZ;
1086                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1087                         schedule_timeout_interruptible(5);
1088                         if (time_after(jiffies, timeout))
1089                                 break;
1090                 }
1091         }
1092         mxser_shutdown(info);
1093
1094         if (tty->driver->flush_buffer)
1095                 tty->driver->flush_buffer(tty);
1096
1097         ld = tty_ldisc_ref(tty);
1098         if (ld) {
1099                 if (ld->flush_buffer)
1100                         ld->flush_buffer(tty);
1101                 tty_ldisc_deref(ld);
1102         }
1103
1104         tty->closing = 0;
1105         info->event = 0;
1106         info->tty = NULL;
1107         if (info->blocked_open) {
1108                 if (info->close_delay)
1109                         schedule_timeout_interruptible(info->close_delay);
1110                 wake_up_interruptible(&info->open_wait);
1111         }
1112
1113         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1114         wake_up_interruptible(&info->close_wait);
1115
1116 }
1117
1118 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1119 {
1120         int c, total = 0;
1121         struct mxser_struct *info = tty->driver_data;
1122         unsigned long flags;
1123
1124         if (!info->xmit_buf)
1125                 return 0;
1126
1127         while (1) {
1128                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1129                                           SERIAL_XMIT_SIZE - info->xmit_head));
1130                 if (c <= 0)
1131                         break;
1132
1133                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1134                 spin_lock_irqsave(&info->slock, flags);
1135                 info->xmit_head = (info->xmit_head + c) &
1136                                   (SERIAL_XMIT_SIZE - 1);
1137                 info->xmit_cnt += c;
1138                 spin_unlock_irqrestore(&info->slock, flags);
1139
1140                 buf += c;
1141                 count -= c;
1142                 total += c;
1143         }
1144
1145         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1146                 if (!tty->hw_stopped ||
1147                                 (info->type == PORT_16550A) ||
1148                                 (info->IsMoxaMustChipFlag)) {
1149                         spin_lock_irqsave(&info->slock, flags);
1150                         info->IER |= UART_IER_THRI;
1151                         outb(info->IER, info->base + UART_IER);
1152                         spin_unlock_irqrestore(&info->slock, flags);
1153                 }
1154         }
1155         return total;
1156 }
1157
1158 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1159 {
1160         struct mxser_struct *info = tty->driver_data;
1161         unsigned long flags;
1162
1163         if (!info->xmit_buf)
1164                 return;
1165
1166         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1167                 return;
1168
1169         spin_lock_irqsave(&info->slock, flags);
1170         info->xmit_buf[info->xmit_head++] = ch;
1171         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1172         info->xmit_cnt++;
1173         spin_unlock_irqrestore(&info->slock, flags);
1174         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1175                 if (!tty->hw_stopped ||
1176                                 (info->type == PORT_16550A) ||
1177                                 info->IsMoxaMustChipFlag) {
1178                         spin_lock_irqsave(&info->slock, flags);
1179                         info->IER |= UART_IER_THRI;
1180                         outb(info->IER, info->base + UART_IER);
1181                         spin_unlock_irqrestore(&info->slock, flags);
1182                 }
1183         }
1184 }
1185
1186
1187 static void mxser_flush_chars(struct tty_struct *tty)
1188 {
1189         struct mxser_struct *info = tty->driver_data;
1190         unsigned long flags;
1191
1192         if (info->xmit_cnt <= 0 ||
1193                         tty->stopped ||
1194                         !info->xmit_buf ||
1195                         (tty->hw_stopped &&
1196                          (info->type != PORT_16550A) &&
1197                          (!info->IsMoxaMustChipFlag)
1198                         ))
1199                 return;
1200
1201         spin_lock_irqsave(&info->slock, flags);
1202
1203         info->IER |= UART_IER_THRI;
1204         outb(info->IER, info->base + UART_IER);
1205
1206         spin_unlock_irqrestore(&info->slock, flags);
1207 }
1208
1209 static int mxser_write_room(struct tty_struct *tty)
1210 {
1211         struct mxser_struct *info = tty->driver_data;
1212         int ret;
1213
1214         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1215         if (ret < 0)
1216                 ret = 0;
1217         return ret;
1218 }
1219
1220 static int mxser_chars_in_buffer(struct tty_struct *tty)
1221 {
1222         struct mxser_struct *info = tty->driver_data;
1223         return info->xmit_cnt;
1224 }
1225
1226 static void mxser_flush_buffer(struct tty_struct *tty)
1227 {
1228         struct mxser_struct *info = tty->driver_data;
1229         char fcr;
1230         unsigned long flags;
1231
1232
1233         spin_lock_irqsave(&info->slock, flags);
1234         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1235
1236         /* below added by shinhay */
1237         fcr = inb(info->base + UART_FCR);
1238         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1239                 info->base + UART_FCR);
1240         outb(fcr, info->base + UART_FCR);
1241
1242         spin_unlock_irqrestore(&info->slock, flags);
1243         /* above added by shinhay */
1244
1245         tty_wakeup(tty);
1246 }
1247
1248 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1249 {
1250         struct mxser_struct *info = tty->driver_data;
1251         int retval;
1252         struct async_icount cprev, cnow;        /* kernel counter temps */
1253         struct serial_icounter_struct __user *p_cuser;
1254         unsigned long templ;
1255         unsigned long flags;
1256         void __user *argp = (void __user *)arg;
1257
1258         if (tty->index == MXSER_PORTS)
1259                 return mxser_ioctl_special(cmd, argp);
1260
1261         /* following add by Victor Yu. 01-05-2004 */
1262         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1263                 int opmode, p;
1264                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1265                 int shiftbit;
1266                 unsigned char val, mask;
1267
1268                 p = info->port % 4;
1269                 if (cmd == MOXA_SET_OP_MODE) {
1270                         if (get_user(opmode, (int __user *) argp))
1271                                 return -EFAULT;
1272                         if (opmode != RS232_MODE &&
1273                                         opmode != RS485_2WIRE_MODE &&
1274                                         opmode != RS422_MODE &&
1275                                         opmode != RS485_4WIRE_MODE)
1276                                 return -EFAULT;
1277                         mask = ModeMask[p];
1278                         shiftbit = p * 2;
1279                         val = inb(info->opmode_ioaddr);
1280                         val &= mask;
1281                         val |= (opmode << shiftbit);
1282                         outb(val, info->opmode_ioaddr);
1283                 } else {
1284                         shiftbit = p * 2;
1285                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1286                         opmode &= OP_MODE_MASK;
1287                         if (copy_to_user(argp, &opmode, sizeof(int)))
1288                                 return -EFAULT;
1289                 }
1290                 return 0;
1291         }
1292         /* above add by Victor Yu. 01-05-2004 */
1293
1294         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1295                 if (tty->flags & (1 << TTY_IO_ERROR))
1296                         return -EIO;
1297         }
1298         switch (cmd) {
1299         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1300                 retval = tty_check_change(tty);
1301                 if (retval)
1302                         return retval;
1303                 tty_wait_until_sent(tty, 0);
1304                 if (!arg)
1305                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1306                 return 0;
1307         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1308                 retval = tty_check_change(tty);
1309                 if (retval)
1310                         return retval;
1311                 tty_wait_until_sent(tty, 0);
1312                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1313                 return 0;
1314         case TIOCGSOFTCAR:
1315                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1316         case TIOCSSOFTCAR:
1317                 if (get_user(templ, (unsigned long __user *) argp))
1318                         return -EFAULT;
1319                 arg = templ;
1320                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1321                 return 0;
1322         case TIOCGSERIAL:
1323                 return mxser_get_serial_info(info, argp);
1324         case TIOCSSERIAL:
1325                 return mxser_set_serial_info(info, argp);
1326         case TIOCSERGETLSR:     /* Get line status register */
1327                 return mxser_get_lsr_info(info, argp);
1328                 /*
1329                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1330                  * - mask passed in arg for lines of interest
1331                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1332                  * Caller should use TIOCGICOUNT to see which one it was
1333                  */
1334         case TIOCMIWAIT:
1335                 spin_lock_irqsave(&info->slock, flags);
1336                 cnow = info->icount;    /* note the counters on entry */
1337                 spin_unlock_irqrestore(&info->slock, flags);
1338
1339                 wait_event_interruptible(info->delta_msr_wait, ({
1340                         cprev = cnow;
1341                         spin_lock_irqsave(&info->slock, flags);
1342                         cnow = info->icount;    /* atomic copy */
1343                         spin_unlock_irqrestore(&info->slock, flags);
1344
1345                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1346                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1347                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1348                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1349                 }));
1350                 break;
1351                 /*
1352                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1353                  * Return: write counters to the user passed counter struct
1354                  * NB: both 1->0 and 0->1 transitions are counted except for
1355                  *     RI where only 0->1 is counted.
1356                  */
1357         case TIOCGICOUNT:
1358                 spin_lock_irqsave(&info->slock, flags);
1359                 cnow = info->icount;
1360                 spin_unlock_irqrestore(&info->slock, flags);
1361                 p_cuser = argp;
1362                 /* modified by casper 1/11/2000 */
1363                 if (put_user(cnow.frame, &p_cuser->frame))
1364                         return -EFAULT;
1365                 if (put_user(cnow.brk, &p_cuser->brk))
1366                         return -EFAULT;
1367                 if (put_user(cnow.overrun, &p_cuser->overrun))
1368                         return -EFAULT;
1369                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1370                         return -EFAULT;
1371                 if (put_user(cnow.parity, &p_cuser->parity))
1372                         return -EFAULT;
1373                 if (put_user(cnow.rx, &p_cuser->rx))
1374                         return -EFAULT;
1375                 if (put_user(cnow.tx, &p_cuser->tx))
1376                         return -EFAULT;
1377                 put_user(cnow.cts, &p_cuser->cts);
1378                 put_user(cnow.dsr, &p_cuser->dsr);
1379                 put_user(cnow.rng, &p_cuser->rng);
1380                 put_user(cnow.dcd, &p_cuser->dcd);
1381                 return 0;
1382         case MOXA_HighSpeedOn:
1383                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1384         case MOXA_SDS_RSTICOUNTER: {
1385                         info->mon_data.rxcnt = 0;
1386                         info->mon_data.txcnt = 0;
1387                         return 0;
1388                 }
1389 /* (above) added by James. */
1390         case MOXA_ASPP_SETBAUD:{
1391                         long baud;
1392                         if (get_user(baud, (long __user *)argp))
1393                                 return -EFAULT;
1394                         if (mxser_set_baud(info, baud) == -1)
1395                                 return -1;
1396                         return 0;
1397                 }
1398         case MOXA_ASPP_GETBAUD:
1399                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1400                         return -EFAULT;
1401
1402                 return 0;
1403
1404         case MOXA_ASPP_OQUEUE:{
1405                         int len, lsr;
1406
1407                         len = mxser_chars_in_buffer(tty);
1408
1409                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1410
1411                         len += (lsr ? 0 : 1);
1412
1413                         if (copy_to_user(argp, &len, sizeof(int)))
1414                                 return -EFAULT;
1415
1416                         return 0;
1417                 }
1418         case MOXA_ASPP_MON: {
1419                         int mcr, status;
1420
1421                         /* info->mon_data.ser_param = tty->termios->c_cflag; */
1422
1423                         status = mxser_get_msr(info->base, 1, info->port, info);
1424                         mxser_check_modem_status(info, status);
1425
1426                         mcr = inb(info->base + UART_MCR);
1427                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1428                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1429                         else
1430                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1431
1432                         if (mcr & MOXA_MUST_MCR_TX_XON)
1433                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1434                         else
1435                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1436
1437                         if (info->tty->hw_stopped)
1438                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1439                         else
1440                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1441
1442                         if (copy_to_user(argp, &info->mon_data,
1443                                         sizeof(struct mxser_mon)))
1444                                 return -EFAULT;
1445
1446                         return 0;
1447                 }
1448
1449         case MOXA_ASPP_LSTATUS: {
1450                         if (copy_to_user(argp, &info->err_shadow,
1451                                         sizeof(unsigned char)))
1452                                 return -EFAULT;
1453
1454                         info->err_shadow = 0;
1455                         return 0;
1456                 }
1457         case MOXA_SET_BAUD_METHOD: {
1458                         int method;
1459
1460                         if (get_user(method, (int __user *)argp))
1461                                 return -EFAULT;
1462                         mxser_set_baud_method[info->port] = method;
1463                         if (copy_to_user(argp, &method, sizeof(int)))
1464                                 return -EFAULT;
1465
1466                         return 0;
1467                 }
1468         default:
1469                 return -ENOIOCTLCMD;
1470         }
1471         return 0;
1472 }
1473
1474 #ifndef CMSPAR
1475 #define CMSPAR 010000000000
1476 #endif
1477
1478 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1479 {
1480         int i, result, status;
1481
1482         switch (cmd) {
1483         case MOXA_GET_CONF:
1484                 if (copy_to_user(argp, mxsercfg,
1485                                 sizeof(struct mxser_hwconf) * 4))
1486                         return -EFAULT;
1487                 return 0;
1488         case MOXA_GET_MAJOR:
1489                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1490                         return -EFAULT;
1491                 return 0;
1492
1493         case MOXA_GET_CUMAJOR:
1494                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1495                         return -EFAULT;
1496                 return 0;
1497
1498         case MOXA_CHKPORTENABLE:
1499                 result = 0;
1500                 for (i = 0; i < MXSER_PORTS; i++) {
1501                         if (mxvar_table[i].base)
1502                                 result |= (1 << i);
1503                 }
1504                 return put_user(result, (unsigned long __user *)argp);
1505         case MOXA_GETDATACOUNT:
1506                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1507                         return -EFAULT;
1508                 return 0;
1509         case MOXA_GETMSTATUS:
1510                 for (i = 0; i < MXSER_PORTS; i++) {
1511                         GMStatus[i].ri = 0;
1512                         if (!mxvar_table[i].base) {
1513                                 GMStatus[i].dcd = 0;
1514                                 GMStatus[i].dsr = 0;
1515                                 GMStatus[i].cts = 0;
1516                                 continue;
1517                         }
1518
1519                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1520                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1521                         else
1522                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1523
1524                         status = inb(mxvar_table[i].base + UART_MSR);
1525                         if (status & 0x80 /*UART_MSR_DCD */ )
1526                                 GMStatus[i].dcd = 1;
1527                         else
1528                                 GMStatus[i].dcd = 0;
1529
1530                         if (status & 0x20 /*UART_MSR_DSR */ )
1531                                 GMStatus[i].dsr = 1;
1532                         else
1533                                 GMStatus[i].dsr = 0;
1534
1535
1536                         if (status & 0x10 /*UART_MSR_CTS */ )
1537                                 GMStatus[i].cts = 1;
1538                         else
1539                                 GMStatus[i].cts = 0;
1540                 }
1541                 if (copy_to_user(argp, GMStatus,
1542                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1543                         return -EFAULT;
1544                 return 0;
1545         case MOXA_ASPP_MON_EXT: {
1546                         int status;
1547                         int opmode, p;
1548                         int shiftbit;
1549                         unsigned cflag, iflag;
1550
1551                         for (i = 0; i < MXSER_PORTS; i++) {
1552                                 if (!mxvar_table[i].base)
1553                                         continue;
1554
1555                                 status = mxser_get_msr(mxvar_table[i].base, 0,
1556                                                         i, &(mxvar_table[i]));
1557                                 /*
1558                                 mxser_check_modem_status(&mxvar_table[i],
1559                                                                 status);
1560                                 */
1561                                 if (status & UART_MSR_TERI)
1562                                         mxvar_table[i].icount.rng++;
1563                                 if (status & UART_MSR_DDSR)
1564                                         mxvar_table[i].icount.dsr++;
1565                                 if (status & UART_MSR_DDCD)
1566                                         mxvar_table[i].icount.dcd++;
1567                                 if (status & UART_MSR_DCTS)
1568                                         mxvar_table[i].icount.cts++;
1569
1570                                 mxvar_table[i].mon_data.modem_status = status;
1571                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1572                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1573                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1574                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1575                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1576                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1577
1578                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1579                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1580                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1581                                 } else {
1582                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1583                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1584                                 }
1585
1586                                 mon_data_ext.databits[i] = cflag & CSIZE;
1587
1588                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1589
1590                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1591
1592                                 mon_data_ext.flowctrl[i] = 0x00;
1593
1594                                 if (cflag & CRTSCTS)
1595                                         mon_data_ext.flowctrl[i] |= 0x03;
1596
1597                                 if (iflag & (IXON | IXOFF))
1598                                         mon_data_ext.flowctrl[i] |= 0x0C;
1599
1600                                 if (mxvar_table[i].type == PORT_16550A)
1601                                         mon_data_ext.fifo[i] = 1;
1602                                 else
1603                                         mon_data_ext.fifo[i] = 0;
1604
1605                                 p = i % 4;
1606                                 shiftbit = p * 2;
1607                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1608                                 opmode &= OP_MODE_MASK;
1609
1610                                 mon_data_ext.iftype[i] = opmode;
1611
1612                         }
1613                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1614                                 return -EFAULT;
1615
1616                         return 0;
1617
1618                 }
1619         default:
1620                 return -ENOIOCTLCMD;
1621         }
1622         return 0;
1623 }
1624
1625 static void mxser_stoprx(struct tty_struct *tty)
1626 {
1627         struct mxser_struct *info = tty->driver_data;
1628         /* unsigned long flags; */
1629
1630         info->ldisc_stop_rx = 1;
1631         if (I_IXOFF(tty)) {
1632                 /* MX_LOCK(&info->slock); */
1633                 /* following add by Victor Yu. 09-02-2002 */
1634                 if (info->IsMoxaMustChipFlag) {
1635                         info->IER &= ~MOXA_MUST_RECV_ISR;
1636                         outb(info->IER, info->base + UART_IER);
1637                 } else {
1638                         /* above add by Victor Yu. 09-02-2002 */
1639                         info->x_char = STOP_CHAR(tty);
1640                         /* mask by Victor Yu. 09-02-2002 */
1641                         /* outb(info->IER, 0); */
1642                         outb(0, info->base + UART_IER);
1643                         info->IER |= UART_IER_THRI;
1644                         /* force Tx interrupt */
1645                         outb(info->IER, info->base + UART_IER);
1646                 }               /* add by Victor Yu. 09-02-2002 */
1647                 /* MX_UNLOCK(&info->slock); */
1648         }
1649
1650         if (info->tty->termios->c_cflag & CRTSCTS) {
1651                 /* MX_LOCK(&info->slock); */
1652                 info->MCR &= ~UART_MCR_RTS;
1653                 outb(info->MCR, info->base + UART_MCR);
1654                 /* MX_UNLOCK(&info->slock); */
1655         }
1656 }
1657
1658 static void mxser_startrx(struct tty_struct *tty)
1659 {
1660         struct mxser_struct *info = tty->driver_data;
1661         /* unsigned long flags; */
1662
1663         info->ldisc_stop_rx = 0;
1664         if (I_IXOFF(tty)) {
1665                 if (info->x_char)
1666                         info->x_char = 0;
1667                 else {
1668                         /* MX_LOCK(&info->slock); */
1669
1670                         /* following add by Victor Yu. 09-02-2002 */
1671                         if (info->IsMoxaMustChipFlag) {
1672                                 info->IER |= MOXA_MUST_RECV_ISR;
1673                                 outb(info->IER, info->base + UART_IER);
1674                         } else {
1675                                 /* above add by Victor Yu. 09-02-2002 */
1676
1677                                 info->x_char = START_CHAR(tty);
1678                                 /* mask by Victor Yu. 09-02-2002 */
1679                                 /* outb(info->IER, 0); */
1680                                 /* add by Victor Yu. 09-02-2002 */
1681                                 outb(0, info->base + UART_IER);
1682                                 /* force Tx interrupt */
1683                                 info->IER |= UART_IER_THRI;
1684                                 outb(info->IER, info->base + UART_IER);
1685                         }       /* add by Victor Yu. 09-02-2002 */
1686                         /* MX_UNLOCK(&info->slock); */
1687                 }
1688         }
1689
1690         if (info->tty->termios->c_cflag & CRTSCTS) {
1691                 /* MX_LOCK(&info->slock); */
1692                 info->MCR |= UART_MCR_RTS;
1693                 outb(info->MCR, info->base + UART_MCR);
1694                 /* MX_UNLOCK(&info->slock); */
1695         }
1696 }
1697
1698 /*
1699  * This routine is called by the upper-layer tty layer to signal that
1700  * incoming characters should be throttled.
1701  */
1702 static void mxser_throttle(struct tty_struct *tty)
1703 {
1704         /* struct mxser_struct *info = tty->driver_data; */
1705         /* unsigned long flags; */
1706
1707         /* MX_LOCK(&info->slock); */
1708         mxser_stoprx(tty);
1709         /* MX_UNLOCK(&info->slock); */
1710 }
1711
1712 static void mxser_unthrottle(struct tty_struct *tty)
1713 {
1714         /* struct mxser_struct *info = tty->driver_data; */
1715         /* unsigned long flags; */
1716
1717         /* MX_LOCK(&info->slock); */
1718         mxser_startrx(tty);
1719         /* MX_UNLOCK(&info->slock); */
1720 }
1721
1722 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1723 {
1724         struct mxser_struct *info = tty->driver_data;
1725         unsigned long flags;
1726
1727         mxser_change_speed(info, old_termios);
1728
1729         if ((old_termios->c_cflag & CRTSCTS) &&
1730                         !(tty->termios->c_cflag & CRTSCTS)) {
1731                 tty->hw_stopped = 0;
1732                 mxser_start(tty);
1733         }
1734
1735 /* Handle sw stopped */
1736         if ((old_termios->c_iflag & IXON) &&
1737                         !(tty->termios->c_iflag & IXON)) {
1738                 tty->stopped = 0;
1739
1740                 /* following add by Victor Yu. 09-02-2002 */
1741                 if (info->IsMoxaMustChipFlag) {
1742                         spin_lock_irqsave(&info->slock, flags);
1743                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1744                         spin_unlock_irqrestore(&info->slock, flags);
1745                 }
1746                 /* above add by Victor Yu. 09-02-2002 */
1747
1748                 mxser_start(tty);
1749         }
1750 }
1751
1752 /*
1753  * mxser_stop() and mxser_start()
1754  *
1755  * This routines are called before setting or resetting tty->stopped.
1756  * They enable or disable transmitter interrupts, as necessary.
1757  */
1758 static void mxser_stop(struct tty_struct *tty)
1759 {
1760         struct mxser_struct *info = tty->driver_data;
1761         unsigned long flags;
1762
1763         spin_lock_irqsave(&info->slock, flags);
1764         if (info->IER & UART_IER_THRI) {
1765                 info->IER &= ~UART_IER_THRI;
1766                 outb(info->IER, info->base + UART_IER);
1767         }
1768         spin_unlock_irqrestore(&info->slock, flags);
1769 }
1770
1771 static void mxser_start(struct tty_struct *tty)
1772 {
1773         struct mxser_struct *info = tty->driver_data;
1774         unsigned long flags;
1775
1776         spin_lock_irqsave(&info->slock, flags);
1777         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1778                 info->IER |= UART_IER_THRI;
1779                 outb(info->IER, info->base + UART_IER);
1780         }
1781         spin_unlock_irqrestore(&info->slock, flags);
1782 }
1783
1784 /*
1785  * mxser_wait_until_sent() --- wait until the transmitter is empty
1786  */
1787 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1788 {
1789         struct mxser_struct *info = tty->driver_data;
1790         unsigned long orig_jiffies, char_time;
1791         int lsr;
1792
1793         if (info->type == PORT_UNKNOWN)
1794                 return;
1795
1796         if (info->xmit_fifo_size == 0)
1797                 return;         /* Just in case.... */
1798
1799         orig_jiffies = jiffies;
1800         /*
1801          * Set the check interval to be 1/5 of the estimated time to
1802          * send a single character, and make it at least 1.  The check
1803          * interval should also be less than the timeout.
1804          *
1805          * Note: we have to use pretty tight timings here to satisfy
1806          * the NIST-PCTS.
1807          */
1808         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1809         char_time = char_time / 5;
1810         if (char_time == 0)
1811                 char_time = 1;
1812         if (timeout && timeout < char_time)
1813                 char_time = timeout;
1814         /*
1815          * If the transmitter hasn't cleared in twice the approximate
1816          * amount of time to send the entire FIFO, it probably won't
1817          * ever clear.  This assumes the UART isn't doing flow
1818          * control, which is currently the case.  Hence, if it ever
1819          * takes longer than info->timeout, this is probably due to a
1820          * UART bug of some kind.  So, we clamp the timeout parameter at
1821          * 2*info->timeout.
1822          */
1823         if (!timeout || timeout > 2 * info->timeout)
1824                 timeout = 2 * info->timeout;
1825 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1826         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1827                 timeout, char_time);
1828         printk("jiff=%lu...", jiffies);
1829 #endif
1830         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1831 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1832                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1833 #endif
1834                 schedule_timeout_interruptible(char_time);
1835                 if (signal_pending(current))
1836                         break;
1837                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1838                         break;
1839         }
1840         set_current_state(TASK_RUNNING);
1841
1842 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1843         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1844 #endif
1845 }
1846
1847
1848 /*
1849  * This routine is called by tty_hangup() when a hangup is signaled.
1850  */
1851 void mxser_hangup(struct tty_struct *tty)
1852 {
1853         struct mxser_struct *info = tty->driver_data;
1854
1855         mxser_flush_buffer(tty);
1856         mxser_shutdown(info);
1857         info->event = 0;
1858         info->count = 0;
1859         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1860         info->tty = NULL;
1861         wake_up_interruptible(&info->open_wait);
1862 }
1863
1864
1865 /* added by James 03-12-2004. */
1866 /*
1867  * mxser_rs_break() --- routine which turns the break handling on or off
1868  */
1869 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1870 {
1871         struct mxser_struct *info = tty->driver_data;
1872         unsigned long flags;
1873
1874         spin_lock_irqsave(&info->slock, flags);
1875         if (break_state == -1)
1876                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1877                         info->base + UART_LCR);
1878         else
1879                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1880                         info->base + UART_LCR);
1881         spin_unlock_irqrestore(&info->slock, flags);
1882 }
1883
1884 /* (above) added by James. */
1885
1886
1887 /*
1888  * This is the serial driver's generic interrupt routine
1889  */
1890 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
1891 {
1892         int status, iir, i;
1893         struct mxser_struct *info;
1894         struct mxser_struct *port;
1895         int max, irqbits, bits, msr;
1896         int pass_counter = 0;
1897         int handled = IRQ_NONE;
1898
1899         port = NULL;
1900         /* spin_lock(&gm_lock); */
1901
1902         for (i = 0; i < MXSER_BOARDS; i++) {
1903                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1904                         port = dev_id;
1905                         break;
1906                 }
1907         }
1908
1909         if (i == MXSER_BOARDS)
1910                 goto irq_stop;
1911         if (port == 0)
1912                 goto irq_stop;
1913         max = mxser_numports[mxsercfg[i].board_type - 1];
1914         while (1) {
1915                 irqbits = inb(port->vector) & port->vectormask;
1916                 if (irqbits == port->vectormask)
1917                         break;
1918
1919                 handled = IRQ_HANDLED;
1920                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1921                         if (irqbits == port->vectormask)
1922                                 break;
1923                         if (bits & irqbits)
1924                                 continue;
1925                         info = port + i;
1926
1927                         /* following add by Victor Yu. 09-13-2002 */
1928                         iir = inb(info->base + UART_IIR);
1929                         if (iir & UART_IIR_NO_INT)
1930                                 continue;
1931                         iir &= MOXA_MUST_IIR_MASK;
1932                         if (!info->tty) {
1933                                 status = inb(info->base + UART_LSR);
1934                                 outb(0x27, info->base + UART_FCR);
1935                                 inb(info->base + UART_MSR);
1936                                 continue;
1937                         }
1938
1939                         /* mask by Victor Yu. 09-13-2002
1940                            if ( !info->tty ||
1941                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1942                            continue;
1943                          */
1944                         /* mask by Victor Yu. 09-02-2002
1945                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1946                          */
1947
1948                         /* following add by Victor Yu. 09-02-2002 */
1949                         status = inb(info->base + UART_LSR);
1950
1951                         if (status & UART_LSR_PE)
1952                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1953                         if (status & UART_LSR_FE)
1954                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1955                         if (status & UART_LSR_OE)
1956                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1957                         if (status & UART_LSR_BI)
1958                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
1959
1960                         if (info->IsMoxaMustChipFlag) {
1961                                 /*
1962                                    if ( (status & 0x02) && !(status & 0x01) ) {
1963                                    outb(info->base+UART_FCR,  0x23);
1964                                    continue;
1965                                    }
1966                                  */
1967                                 if (iir == MOXA_MUST_IIR_GDA ||
1968                                                 iir == MOXA_MUST_IIR_RDA ||
1969                                                 iir == MOXA_MUST_IIR_RTO ||
1970                                                 iir == MOXA_MUST_IIR_LSR)
1971                                         mxser_receive_chars(info, &status);
1972
1973                         } else {
1974                                 /* above add by Victor Yu. 09-02-2002 */
1975
1976                                 status &= info->read_status_mask;
1977                                 if (status & UART_LSR_DR)
1978                                         mxser_receive_chars(info, &status);
1979                         }
1980                         msr = inb(info->base + UART_MSR);
1981                         if (msr & UART_MSR_ANY_DELTA) {
1982                                 mxser_check_modem_status(info, msr);
1983                         }
1984                         /* following add by Victor Yu. 09-13-2002 */
1985                         if (info->IsMoxaMustChipFlag) {
1986                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1987                                         mxser_transmit_chars(info);
1988                                 }
1989                         } else {
1990                                 /* above add by Victor Yu. 09-13-2002 */
1991
1992                                 if (status & UART_LSR_THRE) {
1993 /* 8-2-99 by William
1994                             if ( info->x_char || (info->xmit_cnt > 0) )
1995 */
1996                                         mxser_transmit_chars(info);
1997                                 }
1998                         }
1999                 }
2000                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2001                         break;  /* Prevent infinite loops */
2002                 }
2003         }
2004
2005       irq_stop:
2006         /* spin_unlock(&gm_lock); */
2007         return handled;
2008 }
2009
2010 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2011 {
2012         struct tty_struct *tty = info->tty;
2013         unsigned char ch, gdl;
2014         int ignored = 0;
2015         int cnt = 0;
2016         int recv_room;
2017         int max = 256;
2018         unsigned long flags;
2019
2020         spin_lock_irqsave(&info->slock, flags);
2021
2022         recv_room = tty->receive_room;
2023         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2024                 /* mxser_throttle(tty); */
2025                 mxser_stoprx(tty);
2026                 /* return; */
2027         }
2028
2029         /* following add by Victor Yu. 09-02-2002 */
2030         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2031
2032                 if (*status & UART_LSR_SPECIAL) {
2033                         goto intr_old;
2034                 }
2035                 /* following add by Victor Yu. 02-11-2004 */
2036                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2037                                 (*status & MOXA_MUST_LSR_RERR))
2038                         goto intr_old;
2039                 /* above add by Victor Yu. 02-14-2004 */
2040                 if (*status & MOXA_MUST_LSR_RERR)
2041                         goto intr_old;
2042
2043                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2044
2045                 /* add by Victor Yu. 02-11-2004 */
2046                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2047                         gdl &= MOXA_MUST_GDL_MASK;
2048                 if (gdl >= recv_room) {
2049                         if (!info->ldisc_stop_rx) {
2050                                 /* mxser_throttle(tty); */
2051                                 mxser_stoprx(tty);
2052                         }
2053                         /* return; */
2054                 }
2055                 while (gdl--) {
2056                         ch = inb(info->base + UART_RX);
2057                         tty_insert_flip_char(tty, ch, 0);
2058                         cnt++;
2059                         /*
2060                            if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2061                            mxser_stoprx(tty);
2062                            info->stop_rx = 1;
2063                            break;
2064                            } */
2065                 }
2066                 goto end_intr;
2067         }
2068  intr_old:
2069         /* above add by Victor Yu. 09-02-2002 */
2070
2071         do {
2072                 if (max-- < 0)
2073                         break;
2074                 /*
2075                    if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2076                    mxser_stoprx(tty);
2077                    info->stop_rx=1;
2078                    break;
2079                    }
2080                  */
2081
2082                 ch = inb(info->base + UART_RX);
2083                 /* following add by Victor Yu. 09-02-2002 */
2084                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2085                         outb(0x23, info->base + UART_FCR);
2086                 *status &= info->read_status_mask;
2087                 /* above add by Victor Yu. 09-02-2002 */
2088                 if (*status & info->ignore_status_mask) {
2089                         if (++ignored > 100)
2090                                 break;
2091                 } else {
2092                         char flag = 0;
2093                         if (*status & UART_LSR_SPECIAL) {
2094                                 if (*status & UART_LSR_BI) {
2095                                         flag = TTY_BREAK;
2096 /* added by casper 1/11/2000 */
2097                                         info->icount.brk++;
2098 /* */
2099                                         if (info->flags & ASYNC_SAK)
2100                                                 do_SAK(tty);
2101                                 } else if (*status & UART_LSR_PE) {
2102                                         flag = TTY_PARITY;
2103 /* added by casper 1/11/2000 */
2104                                         info->icount.parity++;
2105 /* */
2106                                 } else if (*status & UART_LSR_FE) {
2107                                         flag = TTY_FRAME;
2108 /* added by casper 1/11/2000 */
2109                                         info->icount.frame++;
2110 /* */
2111                                 } else if (*status & UART_LSR_OE) {
2112                                         flag = TTY_OVERRUN;
2113 /* added by casper 1/11/2000 */
2114                                         info->icount.overrun++;
2115 /* */
2116                                 }
2117                         }
2118                         tty_insert_flip_char(tty, ch, flag);
2119                         cnt++;
2120                         if (cnt >= recv_room) {
2121                                 if (!info->ldisc_stop_rx) {
2122                                         /* mxser_throttle(tty); */
2123                                         mxser_stoprx(tty);
2124                                 }
2125                                 break;
2126                         }
2127
2128                 }
2129
2130                 /* following add by Victor Yu. 09-02-2002 */
2131                 if (info->IsMoxaMustChipFlag)
2132                         break;
2133                 /* above add by Victor Yu. 09-02-2002 */
2134
2135                 /* mask by Victor Yu. 09-02-2002
2136                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2137                  */
2138                 /* following add by Victor Yu. 09-02-2002 */
2139                 *status = inb(info->base + UART_LSR);
2140                 /* above add by Victor Yu. 09-02-2002 */
2141         } while (*status & UART_LSR_DR);
2142
2143 end_intr:               /* add by Victor Yu. 09-02-2002 */
2144         mxvar_log.rxcnt[info->port] += cnt;
2145         info->mon_data.rxcnt += cnt;
2146         info->mon_data.up_rxcnt += cnt;
2147         spin_unlock_irqrestore(&info->slock, flags);
2148
2149         tty_flip_buffer_push(tty);
2150 }
2151
2152 static void mxser_transmit_chars(struct mxser_struct *info)
2153 {
2154         int count, cnt;
2155         unsigned long flags;
2156
2157         spin_lock_irqsave(&info->slock, flags);
2158
2159         if (info->x_char) {
2160                 outb(info->x_char, info->base + UART_TX);
2161                 info->x_char = 0;
2162                 mxvar_log.txcnt[info->port]++;
2163                 info->mon_data.txcnt++;
2164                 info->mon_data.up_txcnt++;
2165
2166 /* added by casper 1/11/2000 */
2167                 info->icount.tx++;
2168 /* */
2169                 spin_unlock_irqrestore(&info->slock, flags);
2170                 return;
2171         }
2172
2173         if (info->xmit_buf == 0) {
2174                 spin_unlock_irqrestore(&info->slock, flags);
2175                 return;
2176         }
2177
2178         if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2179                         (info->tty->hw_stopped &&
2180                         (info->type != PORT_16550A) &&
2181                         (!info->IsMoxaMustChipFlag))) {
2182                 info->IER &= ~UART_IER_THRI;
2183                 outb(info->IER, info->base + UART_IER);
2184                 spin_unlock_irqrestore(&info->slock, flags);
2185                 return;
2186         }
2187
2188         cnt = info->xmit_cnt;
2189         count = info->xmit_fifo_size;
2190         do {
2191                 outb(info->xmit_buf[info->xmit_tail++],
2192                         info->base + UART_TX);
2193                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2194                 if (--info->xmit_cnt <= 0)
2195                         break;
2196         } while (--count > 0);
2197         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2198
2199 /* added by James 03-12-2004. */
2200         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2201         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2202 /* (above) added by James. */
2203
2204 /* added by casper 1/11/2000 */
2205         info->icount.tx += (cnt - info->xmit_cnt);
2206 /* */
2207
2208         if (info->xmit_cnt < WAKEUP_CHARS) {
2209                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2210                 schedule_work(&info->tqueue);
2211         }
2212         if (info->xmit_cnt <= 0) {
2213                 info->IER &= ~UART_IER_THRI;
2214                 outb(info->IER, info->base + UART_IER);
2215         }
2216         spin_unlock_irqrestore(&info->slock, flags);
2217 }
2218
2219 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2220 {
2221         /* update input line counters */
2222         if (status & UART_MSR_TERI)
2223                 info->icount.rng++;
2224         if (status & UART_MSR_DDSR)
2225                 info->icount.dsr++;
2226         if (status & UART_MSR_DDCD)
2227                 info->icount.dcd++;
2228         if (status & UART_MSR_DCTS)
2229                 info->icount.cts++;
2230         info->mon_data.modem_status = status;
2231         wake_up_interruptible(&info->delta_msr_wait);
2232
2233         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2234                 if (status & UART_MSR_DCD)
2235                         wake_up_interruptible(&info->open_wait);
2236                 schedule_work(&info->tqueue);
2237         }
2238
2239         if (info->flags & ASYNC_CTS_FLOW) {
2240                 if (info->tty->hw_stopped) {
2241                         if (status & UART_MSR_CTS) {
2242                                 info->tty->hw_stopped = 0;
2243
2244                                 if ((info->type != PORT_16550A) &&
2245                                                 (!info->IsMoxaMustChipFlag)) {
2246                                         info->IER |= UART_IER_THRI;
2247                                         outb(info->IER, info->base + UART_IER);
2248                                 }
2249                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2250                                 schedule_work(&info->tqueue);                   }
2251                 } else {
2252                         if (!(status & UART_MSR_CTS)) {
2253                                 info->tty->hw_stopped = 1;
2254                                 if ((info->type != PORT_16550A) &&
2255                                                 (!info->IsMoxaMustChipFlag)) {
2256                                         info->IER &= ~UART_IER_THRI;
2257                                         outb(info->IER, info->base + UART_IER);
2258                                 }
2259                         }
2260                 }
2261         }
2262 }
2263
2264 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2265 {
2266         DECLARE_WAITQUEUE(wait, current);
2267         int retval;
2268         int do_clocal = 0;
2269         unsigned long flags;
2270
2271         /*
2272          * If non-blocking mode is set, or the port is not enabled,
2273          * then make the check up front and then exit.
2274          */
2275         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2276                 info->flags |= ASYNC_NORMAL_ACTIVE;
2277                 return 0;
2278         }
2279
2280         if (tty->termios->c_cflag & CLOCAL)
2281                 do_clocal = 1;
2282
2283         /*
2284          * Block waiting for the carrier detect and the line to become
2285          * free (i.e., not in use by the callout).  While we are in
2286          * this loop, info->count is dropped by one, so that
2287          * mxser_close() knows when to free things.  We restore it upon
2288          * exit, either normal or abnormal.
2289          */
2290         retval = 0;
2291         add_wait_queue(&info->open_wait, &wait);
2292
2293         spin_lock_irqsave(&info->slock, flags);
2294         if (!tty_hung_up_p(filp))
2295                 info->count--;
2296         spin_unlock_irqrestore(&info->slock, flags);
2297         info->blocked_open++;
2298         while (1) {
2299                 spin_lock_irqsave(&info->slock, flags);
2300                 outb(inb(info->base + UART_MCR) |
2301                         UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2302                 spin_unlock_irqrestore(&info->slock, flags);
2303                 set_current_state(TASK_INTERRUPTIBLE);
2304                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2305                         if (info->flags & ASYNC_HUP_NOTIFY)
2306                                 retval = -EAGAIN;
2307                         else
2308                                 retval = -ERESTARTSYS;
2309                         break;
2310                 }
2311                 if (!(info->flags & ASYNC_CLOSING) &&
2312                                 (do_clocal ||
2313                                 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2314                         break;
2315                 if (signal_pending(current)) {
2316                         retval = -ERESTARTSYS;
2317                         break;
2318                 }
2319                 schedule();
2320         }
2321         set_current_state(TASK_RUNNING);
2322         remove_wait_queue(&info->open_wait, &wait);
2323         if (!tty_hung_up_p(filp))
2324                 info->count++;
2325         info->blocked_open--;
2326         if (retval)
2327                 return retval;
2328         info->flags |= ASYNC_NORMAL_ACTIVE;
2329         return 0;
2330 }
2331
2332 static int mxser_startup(struct mxser_struct *info)
2333 {
2334         unsigned long page;
2335         unsigned long flags;
2336
2337         page = __get_free_page(GFP_KERNEL);
2338         if (!page)
2339                 return -ENOMEM;
2340
2341         spin_lock_irqsave(&info->slock, flags);
2342
2343         if (info->flags & ASYNC_INITIALIZED) {
2344                 free_page(page);
2345                 spin_unlock_irqrestore(&info->slock, flags);
2346                 return 0;
2347         }
2348
2349         if (!info->base || !info->type) {
2350                 if (info->tty)
2351                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2352                 free_page(page);
2353                 spin_unlock_irqrestore(&info->slock, flags);
2354                 return 0;
2355         }
2356         if (info->xmit_buf)
2357                 free_page(page);
2358         else
2359                 info->xmit_buf = (unsigned char *) page;
2360
2361         /*
2362          * Clear the FIFO buffers and disable them
2363          * (they will be reenabled in mxser_change_speed())
2364          */
2365         if (info->IsMoxaMustChipFlag)
2366                 outb((UART_FCR_CLEAR_RCVR |
2367                         UART_FCR_CLEAR_XMIT |
2368                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2369         else
2370                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2371                         info->base + UART_FCR);
2372
2373         /*
2374          * At this point there's no way the LSR could still be 0xFF;
2375          * if it is, then bail out, because there's likely no UART
2376          * here.
2377          */
2378         if (inb(info->base + UART_LSR) == 0xff) {
2379                 spin_unlock_irqrestore(&info->slock, flags);
2380                 if (capable(CAP_SYS_ADMIN)) {
2381                         if (info->tty)
2382                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2383                         return 0;
2384                 } else
2385                         return -ENODEV;
2386         }
2387
2388         /*
2389          * Clear the interrupt registers.
2390          */
2391         (void) inb(info->base + UART_LSR);
2392         (void) inb(info->base + UART_RX);
2393         (void) inb(info->base + UART_IIR);
2394         (void) inb(info->base + UART_MSR);
2395
2396         /*
2397          * Now, initialize the UART
2398          */
2399         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2400         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2401         outb(info->MCR, info->base + UART_MCR);
2402
2403         /*
2404          * Finally, enable interrupts
2405          */
2406         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2407         /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2408
2409         /* following add by Victor Yu. 08-30-2002 */
2410         if (info->IsMoxaMustChipFlag)
2411                 info->IER |= MOXA_MUST_IER_EGDAI;
2412         /* above add by Victor Yu. 08-30-2002 */
2413         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2414
2415         /*
2416          * And clear the interrupt registers again for luck.
2417          */
2418         (void) inb(info->base + UART_LSR);
2419         (void) inb(info->base + UART_RX);
2420         (void) inb(info->base + UART_IIR);
2421         (void) inb(info->base + UART_MSR);
2422
2423         if (info->tty)
2424                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2425         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2426
2427         /*
2428          * and set the speed of the serial port
2429          */
2430         spin_unlock_irqrestore(&info->slock, flags);
2431         mxser_change_speed(info, NULL);
2432
2433         info->flags |= ASYNC_INITIALIZED;
2434         return 0;
2435 }
2436
2437 /*
2438  * This routine will shutdown a serial port; interrupts maybe disabled, and
2439  * DTR is dropped if the hangup on close termio flag is on.
2440  */
2441 static void mxser_shutdown(struct mxser_struct *info)
2442 {
2443         unsigned long flags;
2444
2445         if (!(info->flags & ASYNC_INITIALIZED))
2446                 return;
2447
2448         spin_lock_irqsave(&info->slock, flags);
2449
2450         /*
2451          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2452          * here so the queue might never be waken up
2453          */
2454         wake_up_interruptible(&info->delta_msr_wait);
2455
2456         /*
2457          * Free the IRQ, if necessary
2458          */
2459         if (info->xmit_buf) {
2460                 free_page((unsigned long) info->xmit_buf);
2461                 info->xmit_buf = NULL;
2462         }
2463
2464         info->IER = 0;
2465         outb(0x00, info->base + UART_IER);
2466
2467         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2468                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2469         outb(info->MCR, info->base + UART_MCR);
2470
2471         /* clear Rx/Tx FIFO's */
2472         /* following add by Victor Yu. 08-30-2002 */
2473         if (info->IsMoxaMustChipFlag)
2474                 outb((UART_FCR_CLEAR_RCVR |
2475                         UART_FCR_CLEAR_XMIT |
2476                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2477         else
2478                 /* above add by Victor Yu. 08-30-2002 */
2479                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2480                         info->base + UART_FCR);
2481
2482         /* read data port to reset things */
2483         (void) inb(info->base + UART_RX);
2484
2485         if (info->tty)
2486                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2487
2488         info->flags &= ~ASYNC_INITIALIZED;
2489
2490         /* following add by Victor Yu. 09-23-2002 */
2491         if (info->IsMoxaMustChipFlag)
2492                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2493         /* above add by Victor Yu. 09-23-2002 */
2494
2495         spin_unlock_irqrestore(&info->slock, flags);
2496 }
2497
2498 /*
2499  * This routine is called to set the UART divisor registers to match
2500  * the specified baud rate for a serial port.
2501  */
2502 static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_termios)
2503 {
2504         unsigned cflag, cval, fcr;
2505         int ret = 0;
2506         unsigned char status;
2507         long baud;
2508         unsigned long flags;
2509
2510         if (!info->tty || !info->tty->termios)
2511                 return ret;
2512         cflag = info->tty->termios->c_cflag;
2513         if (!(info->base))
2514                 return ret;
2515
2516 #ifndef B921600
2517 #define B921600 (B460800 +1)
2518 #endif
2519         if (mxser_set_baud_method[info->port] == 0) {
2520                 baud = tty_get_baud_rate(info->tty);
2521                 if (mxser_set_baud(info, baud) == -1) {
2522                         /* Use previous rate on a failure */
2523                         if (old_termios) {
2524                                 baud = tty_termios_baud_rate(old_termios);
2525                                 tty_encode_baud_rate(info->tty, baud, baud);
2526                         }
2527                 }
2528         }
2529
2530         /* byte size and parity */
2531         switch (cflag & CSIZE) {
2532         case CS5:
2533                 cval = 0x00;
2534                 break;
2535         case CS6:
2536                 cval = 0x01;
2537                 break;
2538         case CS7:
2539                 cval = 0x02;
2540                 break;
2541         case CS8:
2542                 cval = 0x03;
2543                 break;
2544         default:
2545                 cval = 0x00;
2546                 break;          /* too keep GCC shut... */
2547         }
2548         if (cflag & CSTOPB)
2549                 cval |= 0x04;
2550         if (cflag & PARENB)
2551                 cval |= UART_LCR_PARITY;
2552         if (!(cflag & PARODD))
2553                 cval |= UART_LCR_EPAR;
2554         if (cflag & CMSPAR)
2555                 cval |= UART_LCR_SPAR;
2556
2557         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2558                 if (info->IsMoxaMustChipFlag) {
2559                         fcr = UART_FCR_ENABLE_FIFO;
2560                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2561                         SET_MOXA_MUST_FIFO_VALUE(info);
2562                 } else
2563                         fcr = 0;
2564         } else {
2565                 fcr = UART_FCR_ENABLE_FIFO;
2566                 /* following add by Victor Yu. 08-30-2002 */
2567                 if (info->IsMoxaMustChipFlag) {
2568                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2569                         SET_MOXA_MUST_FIFO_VALUE(info);
2570                 } else {
2571                         /* above add by Victor Yu. 08-30-2002 */
2572                         switch (info->rx_trigger) {
2573                         case 1:
2574                                 fcr |= UART_FCR_TRIGGER_1;
2575                                 break;
2576                         case 4:
2577                                 fcr |= UART_FCR_TRIGGER_4;
2578                                 break;
2579                         case 8:
2580                                 fcr |= UART_FCR_TRIGGER_8;
2581                                 break;
2582                         default:
2583                                 fcr |= UART_FCR_TRIGGER_14;
2584                                 break;
2585                         }
2586                 }
2587         }
2588
2589         /* CTS flow control flag and modem status interrupts */
2590         info->IER &= ~UART_IER_MSI;
2591         info->MCR &= ~UART_MCR_AFE;
2592         if (cflag & CRTSCTS) {
2593                 info->flags |= ASYNC_CTS_FLOW;
2594                 info->IER |= UART_IER_MSI;
2595                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2596                         info->MCR |= UART_MCR_AFE;
2597                 } else {
2598                         status = inb(info->base + UART_MSR);
2599                         if (info->tty->hw_stopped) {
2600                                 if (status & UART_MSR_CTS) {
2601                                         info->tty->hw_stopped = 0;
2602                                         if ((info->type != PORT_16550A) &&
2603                                                         (!info->IsMoxaMustChipFlag)) {
2604                                                 info->IER |= UART_IER_THRI;
2605                                                 outb(info->IER, info->base + UART_IER);
2606                                         }
2607                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2608                                         schedule_work(&info->tqueue);                           }
2609                         } else {
2610                                 if (!(status & UART_MSR_CTS)) {
2611                                         info->tty->hw_stopped = 1;
2612                                         if ((info->type != PORT_16550A) &&
2613                                                         (!info->IsMoxaMustChipFlag)) {
2614                                                 info->IER &= ~UART_IER_THRI;
2615                                                 outb(info->IER, info->base + UART_IER);
2616                                         }
2617                                 }
2618                         }
2619                 }
2620         } else {
2621                 info->flags &= ~ASYNC_CTS_FLOW;
2622         }
2623         outb(info->MCR, info->base + UART_MCR);
2624         if (cflag & CLOCAL) {
2625                 info->flags &= ~ASYNC_CHECK_CD;
2626         } else {
2627                 info->flags |= ASYNC_CHECK_CD;
2628                 info->IER |= UART_IER_MSI;
2629         }
2630         outb(info->IER, info->base + UART_IER);
2631
2632         /*
2633          * Set up parity check flag
2634          */
2635         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2636         if (I_INPCK(info->tty))
2637                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2638         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2639                 info->read_status_mask |= UART_LSR_BI;
2640
2641         info->ignore_status_mask = 0;
2642
2643         if (I_IGNBRK(info->tty)) {
2644                 info->ignore_status_mask |= UART_LSR_BI;
2645                 info->read_status_mask |= UART_LSR_BI;
2646                 /*
2647                  * If we're ignore parity and break indicators, ignore
2648                  * overruns too.  (For real raw support).
2649                  */
2650                 if (I_IGNPAR(info->tty)) {
2651                         info->ignore_status_mask |=
2652                                                 UART_LSR_OE |
2653                                                 UART_LSR_PE |
2654                                                 UART_LSR_FE;
2655                         info->read_status_mask |=
2656                                                 UART_LSR_OE |
2657                                                 UART_LSR_PE |
2658                                                 UART_LSR_FE;
2659                 }
2660         }
2661         /* following add by Victor Yu. 09-02-2002 */
2662         if (info->IsMoxaMustChipFlag) {
2663                 spin_lock_irqsave(&info->slock, flags);
2664                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2665                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2666                 if (I_IXON(info->tty)) {
2667                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2668                 } else {
2669                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2670                 }
2671                 if (I_IXOFF(info->tty)) {
2672                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2673                 } else {
2674                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2675                 }
2676                 /*
2677                    if ( I_IXANY(info->tty) ) {
2678                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2679                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2680                    } else {
2681                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2682                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2683                    }
2684                  */
2685                 spin_unlock_irqrestore(&info->slock, flags);
2686         }
2687         /* above add by Victor Yu. 09-02-2002 */
2688
2689
2690         outb(fcr, info->base + UART_FCR);       /* set fcr */
2691         outb(cval, info->base + UART_LCR);
2692
2693         return ret;
2694 }
2695
2696
2697 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2698 {
2699         int quot = 0;
2700         unsigned char cval;
2701         unsigned long flags;
2702         unsigned int baud;
2703
2704         if (!info->tty || !info->tty->termios)
2705                 return -1;
2706
2707         if (!(info->base))
2708                 return -1;
2709
2710         if (newspd > info->MaxCanSetBaudRate)
2711                 return -1;
2712
2713         info->realbaud = newspd;
2714         if (newspd == 134) {
2715                 quot = (2 * info->baud_base / 269);
2716                 tty_encode_baud_rate(info->tty, 134, 134);
2717         } else if (newspd) {
2718                 quot = info->baud_base / newspd;
2719                 if (quot == 0)
2720                         quot = 1;
2721                 baud = info->baud_base / quot;
2722                 tty_encode_baud_rate(info->tty, baud, baud);
2723         } else {
2724                 quot = 0;
2725                 tty_encode_baud_rate(info->tty, 0, 0);
2726         }
2727
2728         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2729         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2730
2731         if (quot) {
2732                 spin_lock_irqsave(&info->slock, flags);
2733                 info->MCR |= UART_MCR_DTR;
2734                 outb(info->MCR, info->base + UART_MCR);
2735                 spin_unlock_irqrestore(&info->slock, flags);
2736         } else {
2737                 spin_lock_irqsave(&info->slock, flags);
2738                 info->MCR &= ~UART_MCR_DTR;
2739                 outb(info->MCR, info->base + UART_MCR);
2740                 spin_unlock_irqrestore(&info->slock, flags);
2741                 return 0;
2742         }
2743
2744         cval = inb(info->base + UART_LCR);
2745
2746         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2747
2748         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2749         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2750         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2751
2752
2753         return 0;
2754 }
2755
2756 /*
2757  * ------------------------------------------------------------
2758  * friends of mxser_ioctl()
2759  * ------------------------------------------------------------
2760  */
2761 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2762 {
2763         struct serial_struct tmp;
2764
2765         if (!retinfo)
2766                 return -EFAULT;
2767         memset(&tmp, 0, sizeof(tmp));
2768         tmp.type = info->type;
2769         tmp.line = info->port;
2770         tmp.port = info->base;
2771         tmp.irq = info->irq;
2772         tmp.flags = info->flags;
2773         tmp.baud_base = info->baud_base;
2774         tmp.close_delay = info->close_delay;
2775         tmp.closing_wait = info->closing_wait;
2776         tmp.custom_divisor = info->custom_divisor;
2777         tmp.hub6 = 0;
2778         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2779                 return -EFAULT;
2780         return 0;
2781 }
2782
2783 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2784 {
2785         struct serial_struct new_serial;
2786         unsigned int flags;
2787         int retval = 0;
2788
2789         if (!new_info || !info->base)
2790                 return -EFAULT;
2791         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2792                 return -EFAULT;
2793
2794         if ((new_serial.irq != info->irq) ||
2795                         (new_serial.port != info->base) ||
2796                         (new_serial.custom_divisor != info->custom_divisor) ||
2797                         (new_serial.baud_base != info->baud_base))
2798                 return -EPERM;
2799
2800         flags = info->flags & ASYNC_SPD_MASK;
2801
2802         if (!capable(CAP_SYS_ADMIN)) {
2803                 if ((new_serial.baud_base != info->baud_base) ||
2804                                 (new_serial.close_delay != info->close_delay) ||
2805                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2806                         return -EPERM;
2807                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2808                                 (new_serial.flags & ASYNC_USR_MASK));
2809         } else {
2810                 /*
2811                  * OK, past this point, all the error checking has been done.
2812                  * At this point, we start making changes.....
2813                  */
2814                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2815                                 (new_serial.flags & ASYNC_FLAGS));
2816                 info->close_delay = new_serial.close_delay * HZ / 100;
2817                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2818                 info->tty->low_latency =
2819                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2820                 info->tty->low_latency = 0;     /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2821         }
2822
2823         /* added by casper, 3/17/2000, for mouse */
2824         info->type = new_serial.type;
2825
2826         process_txrx_fifo(info);
2827
2828         if (info->flags & ASYNC_INITIALIZED) {
2829                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2830                         mxser_change_speed(info, NULL);
2831                 }
2832         } else {
2833                 retval = mxser_startup(info);
2834         }
2835         return retval;
2836 }
2837
2838 /*
2839  * mxser_get_lsr_info - get line status register info
2840  *
2841  * Purpose: Let user call ioctl() to get info when the UART physically
2842  *          is emptied.  On bus types like RS485, the transmitter must
2843  *          release the bus after transmitting. This must be done when
2844  *          the transmit shift register is empty, not be done when the
2845  *          transmit holding register is empty.  This functionality
2846  *          allows an RS485 driver to be written in user space.
2847  */
2848 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2849 {
2850         unsigned char status;
2851         unsigned int result;
2852         unsigned long flags;
2853
2854         spin_lock_irqsave(&info->slock, flags);
2855         status = inb(info->base + UART_LSR);
2856         spin_unlock_irqrestore(&info->slock, flags);
2857         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2858         return put_user(result, value);
2859 }
2860
2861 /*
2862  * This routine sends a break character out the serial port.
2863  */
2864 static void mxser_send_break(struct mxser_struct *info, int duration)
2865 {
2866         unsigned long flags;
2867
2868         if (!info->base)
2869                 return;
2870         set_current_state(TASK_INTERRUPTIBLE);
2871         spin_lock_irqsave(&info->slock, flags);
2872         outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2873                 info->base + UART_LCR);
2874         spin_unlock_irqrestore(&info->slock, flags);
2875         schedule_timeout(duration);
2876         spin_lock_irqsave(&info->slock, flags);
2877         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2878                 info->base + UART_LCR);
2879         spin_unlock_irqrestore(&info->slock, flags);
2880 }
2881
2882 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2883 {
2884         struct mxser_struct *info = tty->driver_data;
2885         unsigned char control, status;
2886         unsigned long flags;
2887
2888
2889         if (tty->index == MXSER_PORTS)
2890                 return -ENOIOCTLCMD;
2891         if (tty->flags & (1 << TTY_IO_ERROR))
2892                 return -EIO;
2893
2894         control = info->MCR;
2895
2896         spin_lock_irqsave(&info->slock, flags);
2897         status = inb(info->base + UART_MSR);
2898         if (status & UART_MSR_ANY_DELTA)
2899                 mxser_check_modem_status(info, status);
2900         spin_unlock_irqrestore(&info->slock, flags);
2901         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2902                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2903                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2904                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2905                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2906                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2907 }
2908
2909 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2910 {
2911         struct mxser_struct *info = tty->driver_data;
2912         unsigned long flags;
2913
2914
2915         if (tty->index == MXSER_PORTS)
2916                 return -ENOIOCTLCMD;
2917         if (tty->flags & (1 << TTY_IO_ERROR))
2918                 return -EIO;
2919
2920         spin_lock_irqsave(&info->slock, flags);
2921
2922         if (set & TIOCM_RTS)
2923                 info->MCR |= UART_MCR_RTS;
2924         if (set & TIOCM_DTR)
2925                 info->MCR |= UART_MCR_DTR;
2926
2927         if (clear & TIOCM_RTS)
2928                 info->MCR &= ~UART_MCR_RTS;
2929         if (clear & TIOCM_DTR)
2930                 info->MCR &= ~UART_MCR_DTR;
2931
2932         outb(info->MCR, info->base + UART_MCR);
2933         spin_unlock_irqrestore(&info->slock, flags);
2934         return 0;
2935 }
2936
2937
2938 static int mxser_read_register(int, unsigned short *);
2939 static int mxser_program_mode(int);
2940 static void mxser_normal_mode(int);
2941
2942 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2943 {
2944         int id, i, bits;
2945         unsigned short regs[16], irq;
2946         unsigned char scratch, scratch2;
2947
2948         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2949
2950         id = mxser_read_register(cap, regs);
2951         if (id == C168_ASIC_ID) {
2952                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2953                 hwconf->ports = 8;
2954         } else if (id == C104_ASIC_ID) {
2955                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2956                 hwconf->ports = 4;
2957         } else if (id == C102_ASIC_ID) {
2958                 hwconf->board_type = MXSER_BOARD_C102_ISA;
2959                 hwconf->ports = 2;
2960         } else if (id == CI132_ASIC_ID) {
2961                 hwconf->board_type = MXSER_BOARD_CI132;
2962                 hwconf->ports = 2;
2963         } else if (id == CI134_ASIC_ID) {
2964                 hwconf->board_type = MXSER_BOARD_CI134;
2965                 hwconf->ports = 4;
2966         } else if (id == CI104J_ASIC_ID) {
2967                 hwconf->board_type = MXSER_BOARD_CI104J;
2968                 hwconf->ports = 4;
2969         } else
2970                 return 0;
2971
2972         irq = 0;
2973         if (hwconf->ports == 2) {
2974                 irq = regs[9] & 0xF000;
2975                 irq = irq | (irq >> 4);
2976                 if (irq != (regs[9] & 0xFF00))
2977                         return MXSER_ERR_IRQ_CONFLIT;
2978         } else if (hwconf->ports == 4) {
2979                 irq = regs[9] & 0xF000;
2980                 irq = irq | (irq >> 4);
2981                 irq = irq | (irq >> 8);
2982                 if (irq != regs[9])
2983                         return MXSER_ERR_IRQ_CONFLIT;
2984         } else if (hwconf->ports == 8) {
2985                 irq = regs[9] & 0xF000;
2986                 irq = irq | (irq >> 4);
2987                 irq = irq | (irq >> 8);
2988                 if ((irq != regs[9]) || (irq != regs[10]))
2989                         return MXSER_ERR_IRQ_CONFLIT;
2990         }
2991
2992         if (!irq)
2993                 return MXSER_ERR_IRQ;
2994         hwconf->irq = ((int)(irq & 0xF000) >> 12);
2995         for (i = 0; i < 8; i++)
2996                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
2997         if ((regs[12] & 0x80) == 0)
2998                 return MXSER_ERR_VECTOR;
2999         hwconf->vector = (int)regs[11]; /* interrupt vector */
3000         if (id == 1)
3001                 hwconf->vector_mask = 0x00FF;
3002         else
3003                 hwconf->vector_mask = 0x000F;
3004         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3005                 if (regs[12] & bits) {
3006                         hwconf->baud_base[i] = 921600;
3007                         hwconf->MaxCanSetBaudRate[i] = 921600;  /* add by Victor Yu. 09-04-2002 */
3008                 } else {
3009                         hwconf->baud_base[i] = 115200;
3010                         hwconf->MaxCanSetBaudRate[i] = 115200;  /* add by Victor Yu. 09-04-2002 */
3011                 }
3012         }
3013         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3014         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3015         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3016         outb(scratch2, cap + UART_LCR);
3017         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3018         scratch = inb(cap + UART_IIR);
3019
3020         if (scratch & 0xC0)
3021                 hwconf->uart_type = PORT_16550A;
3022         else
3023                 hwconf->uart_type = PORT_16450;
3024         if (id == 1)
3025                 hwconf->ports = 8;
3026         else
3027                 hwconf->ports = 4;
3028         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3029         request_region(hwconf->vector, 1, "mxser(vector)");
3030         return hwconf->ports;
3031 }
3032
3033 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3034 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3035 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3036 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3037 #define EN_CCMD         0x000   /* Chip's command register     */
3038 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3039 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3040 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3041 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3042 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3043 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3044 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3045 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3046 static int mxser_read_register(int port, unsigned short *regs)
3047 {
3048         int i, k, value, id;
3049         unsigned int j;
3050
3051         id = mxser_program_mode(port);
3052         if (id < 0)
3053                 return id;
3054         for (i = 0; i < 14; i++) {
3055                 k = (i & 0x3F) | 0x180;
3056                 for (j = 0x100; j > 0; j >>= 1) {
3057                         outb(CHIP_CS, port);
3058                         if (k & j) {
3059                                 outb(CHIP_CS | CHIP_DO, port);
3060                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3061                         } else {
3062                                 outb(CHIP_CS, port);
3063                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3064                         }
3065                 }
3066                 (void)inb(port);
3067                 value = 0;
3068                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3069                         outb(CHIP_CS, port);
3070                         outb(CHIP_CS | CHIP_SK, port);
3071                         if (inb(port) & CHIP_DI)
3072                                 value |= j;
3073                 }
3074                 regs[i] = value;
3075                 outb(0, port);
3076         }
3077         mxser_normal_mode(port);
3078         return id;
3079 }
3080
3081 static int mxser_program_mode(int port)
3082 {
3083         int id, i, j, n;
3084         /* unsigned long flags; */
3085
3086         spin_lock(&gm_lock);
3087         outb(0, port);
3088         outb(0, port);
3089         outb(0, port);
3090         (void)inb(port);
3091         (void)inb(port);
3092         outb(0, port);
3093         (void)inb(port);
3094         /* restore_flags(flags); */
3095         spin_unlock(&gm_lock);
3096
3097         id = inb(port + 1) & 0x1F;
3098         if ((id != C168_ASIC_ID) &&
3099                         (id != C104_ASIC_ID) &&
3100                         (id != C102_ASIC_ID) &&
3101                         (id != CI132_ASIC_ID) &&
3102                         (id != CI134_ASIC_ID) &&
3103                         (id != CI104J_ASIC_ID))
3104                 return -1;
3105         for (i = 0, j = 0; i < 4; i++) {
3106                 n = inb(port + 2);
3107                 if (n == 'M') {
3108                         j = 1;
3109                 } else if ((j == 1) && (n == 1)) {
3110                         j = 2;
3111                         break;
3112                 } else
3113                         j = 0;
3114         }
3115         if (j != 2)
3116                 id = -2;
3117         return id;
3118 }
3119
3120 static void mxser_normal_mode(int port)
3121 {
3122         int i, n;
3123
3124         outb(0xA5, port + 1);
3125         outb(0x80, port + 3);
3126         outb(12, port + 0);     /* 9600 bps */
3127         outb(0, port + 1);
3128         outb(0x03, port + 3);   /* 8 data bits */
3129         outb(0x13, port + 4);   /* loop back mode */
3130         for (i = 0; i < 16; i++) {
3131                 n = inb(port + 5);
3132                 if ((n & 0x61) == 0x60)
3133                         break;
3134                 if ((n & 1) == 1)
3135                         (void)inb(port);
3136         }
3137         outb(0x00, port + 4);
3138 }
3139
3140 module_init(mxser_module_init);
3141 module_exit(mxser_module_exit);