drivers/char/mxser_new.c

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