drivers/char/mxser_new.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2001  Moxa Technologies (support@moxa.com.tw).
   5  *
   6  *      This code is loosely based on the Linux serial driver, written by
   7  *      Linus Torvalds, Theodore T'so and others.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *      Original release        10/26/00
  24  *
  25  *      02/06/01        Support MOXA Industio family boards.
  26  *      02/06/01        Support TIOCGICOUNT.
  27  *      02/06/01        Fix the problem for connecting to serial mouse.
  28  *      02/06/01        Fix the problem for H/W flow control.
  29  *      02/06/01        Fix the compling warning when CONFIG_PCI
  30  *                      don't be defined.
  31  *
  32  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  33  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  34  *      - Fixed x86_64 cleanness
  35  *      - Fixed sleep with spinlock held in mxser_send_break
  36  */
  37
  38
  39 #include <linux/module.h>
  40 #include <linux/autoconf.h>
  41 #include <linux/errno.h>
  42 #include <linux/signal.h>
  43 #include <linux/sched.h>
  44 #include <linux/timer.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/tty.h>
  47 #include <linux/tty_flip.h>
  48 #include <linux/serial.h>
  49 #include <linux/serial_reg.h>
  50 #include <linux/major.h>
  51 #include <linux/string.h>
  52 #include <linux/fcntl.h>
  53 #include <linux/ptrace.h>
  54 #include <linux/gfp.h>
  55 #include <linux/ioport.h>
  56 #include <linux/mm.h>
  57 #include <linux/smp_lock.h>
  58 #include <linux/delay.h>
  59 #include <linux/pci.h>
  60
  61 #include <asm/system.h>
  62 #include <asm/io.h>
  63 #include <asm/irq.h>
  64 #include <asm/bitops.h>
  65 #include <asm/uaccess.h>
  66
  67 #include "mxser.h"
  68
  69 #define MXSER_VERSION   "1.8"
  70 #define MXSERMAJOR       174
  71 #define MXSERCUMAJOR     175
  72
  73 #define MXSER_EVENT_TXLOW       1
  74 #define MXSER_EVENT_HANGUP      2
  75
  76 #define MXSER_BOARDS            4       /* Max. boards */
  77 #define MXSER_PORTS             32      /* Max. ports */
  78 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  79 #define MXSER_ISR_PASS_LIMIT    256
  80
  81 #define MXSER_ERR_IOADDR        -1
  82 #define MXSER_ERR_IRQ           -2
  83 #define MXSER_ERR_IRQ_CONFLIT   -3
  84 #define MXSER_ERR_VECTOR        -4
  85
  86 #define SERIAL_TYPE_NORMAL      1
  87 #define SERIAL_TYPE_CALLOUT     2
  88
  89 #define WAKEUP_CHARS            256
  90
  91 #define UART_MCR_AFE            0x20
  92 #define UART_LSR_SPECIAL        0x1E
  93
  94 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  95                                           IXON|IXOFF))
  96
  97 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
  98
  99 #define C168_ASIC_ID    1
 100 #define C104_ASIC_ID    2
 101 #define C102_ASIC_ID    0xB
 102 #define CI132_ASIC_ID   4
 103 #define CI134_ASIC_ID   3
 104 #define CI104J_ASIC_ID  5
 105
 106 enum {
 107         MXSER_BOARD_C168_ISA = 1,
 108         MXSER_BOARD_C104_ISA,
 109         MXSER_BOARD_CI104J,
 110         MXSER_BOARD_C168_PCI,
 111         MXSER_BOARD_C104_PCI,
 112         MXSER_BOARD_C102_ISA,
 113         MXSER_BOARD_CI132,
 114         MXSER_BOARD_CI134,
 115         MXSER_BOARD_CP132,
 116         MXSER_BOARD_CP114,
 117         MXSER_BOARD_CT114,
 118         MXSER_BOARD_CP102,
 119         MXSER_BOARD_CP104U,
 120         MXSER_BOARD_CP168U,
 121         MXSER_BOARD_CP132U,
 122         MXSER_BOARD_CP134U,
 123         MXSER_BOARD_CP104JU,
 124         MXSER_BOARD_RC7000,
 125         MXSER_BOARD_CP118U,
 126         MXSER_BOARD_CP102UL,
 127         MXSER_BOARD_CP102U,
 128 };
 129
 130 static char *mxser_brdname[] = {
 131         "C168 series",
 132         "C104 series",
 133         "CI-104J series",
 134         "C168H/PCI series",
 135         "C104H/PCI series",
 136         "C102 series",
 137         "CI-132 series",
 138         "CI-134 series",
 139         "CP-132 series",
 140         "CP-114 series",
 141         "CT-114 series",
 142         "CP-102 series",
 143         "CP-104U series",
 144         "CP-168U series",
 145         "CP-132U series",
 146         "CP-134U series",
 147         "CP-104JU series",
 148         "Moxa UC7000 Serial",
 149         "CP-118U series",
 150         "CP-102UL series",
 151         "CP-102U series",
 152 };
 153
 154 static int mxser_numports[] = {
 155         8,                      /* C168-ISA */
 156         4,                      /* C104-ISA */
 157         4,                      /* CI104J */
 158         8,                      /* C168-PCI */
 159         4,                      /* C104-PCI */
 160         2,                      /* C102-ISA */
 161         2,                      /* CI132 */
 162         4,                      /* CI134 */
 163         2,                      /* CP132 */
 164         4,                      /* CP114 */
 165         4,                      /* CT114 */
 166         2,                      /* CP102 */
 167         4,                      /* CP104U */
 168         8,                      /* CP168U */
 169         2,                      /* CP132U */
 170         4,                      /* CP134U */
 171         4,                      /* CP104JU */
 172         8,                      /* RC7000 */
 173         8,                      /* CP118U */
 174         2,                      /* CP102UL */
 175         2,                      /* CP102U */
 176 };
 177
 178 #define UART_TYPE_NUM   2
 179
 180 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 181         MOXA_MUST_MU150_HWID,
 182         MOXA_MUST_MU860_HWID
 183 };
 184
 185 /* This is only for PCI */
 186 #define UART_INFO_NUM   3
 187 struct mxpciuart_info {
 188         int type;
 189         int tx_fifo;
 190         int rx_fifo;
 191         int xmit_fifo_size;
 192         int rx_high_water;
 193         int rx_trigger;
 194         int rx_low_water;
 195         long max_baud;
 196 };
 197
 198 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 199         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 200         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 201         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 202 };
 203
 204
 205 #ifdef CONFIG_PCI
 206
 207 static struct pci_device_id mxser_pcibrds[] = {
 208         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 222         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 223         {0}
 224 };
 225
 226 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 227
 228
 229 #endif
 230
 231 typedef struct _moxa_pci_info {
 232         unsigned short busNum;
 233         unsigned short devNum;
 234         struct pci_dev *pdev;   /* add by Victor Yu. 06-23-2003 */
 235 } moxa_pci_info;
 236
 237 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 238 static int ttymajor = MXSERMAJOR;
 239 static int calloutmajor = MXSERCUMAJOR;
 240 static int verbose = 0;
 241
 242 /* Variables for insmod */
 243
 244 MODULE_AUTHOR("Casper Yang");
 245 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 246 module_param_array(ioaddr, int, NULL, 0);
 247 module_param(ttymajor, int, 0);
 248 module_param(calloutmajor, int, 0);
 249 module_param(verbose, bool, 0);
 250 MODULE_LICENSE("GPL");
 251
 252 struct mxser_log {
 253         int tick;
 254         unsigned long rxcnt[MXSER_PORTS];
 255         unsigned long txcnt[MXSER_PORTS];
 256 };
 257
 258
 259 struct mxser_mon {
 260         unsigned long rxcnt;
 261         unsigned long txcnt;
 262         unsigned long up_rxcnt;
 263         unsigned long up_txcnt;
 264         int modem_status;
 265         unsigned char hold_reason;
 266 };
 267
 268 struct mxser_mon_ext {
 269         unsigned long rx_cnt[32];
 270         unsigned long tx_cnt[32];
 271         unsigned long up_rxcnt[32];
 272         unsigned long up_txcnt[32];
 273         int modem_status[32];
 274
 275         long baudrate[32];
 276         int databits[32];
 277         int stopbits[32];
 278         int parity[32];
 279         int flowctrl[32];
 280         int fifo[32];
 281         int iftype[32];
 282 };
 283
 284 struct mxser_hwconf {
 285         int board_type;
 286         int ports;
 287         int irq;
 288         int vector;
 289         int vector_mask;
 290         int uart_type;
 291         int ioaddr[MXSER_PORTS_PER_BOARD];
 292         int baud_base[MXSER_PORTS_PER_BOARD];
 293         moxa_pci_info pciInfo;
 294         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 295         int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];   /* add by Victor Yu. 09-04-2002 */
 296         int opmode_ioaddr[MXSER_PORTS_PER_BOARD];       /* add by Victor Yu. 01-05-2004 */
 297 };
 298
 299 struct mxser_struct {
 300         int port;
 301         int base;               /* port base address */
 302         int irq;                /* port using irq no. */
 303         int vector;             /* port irq vector */
 304         int vectormask;         /* port vector mask */
 305         int rx_high_water;
 306         int rx_trigger;         /* Rx fifo trigger level */
 307         int rx_low_water;
 308         int baud_base;          /* max. speed */
 309         int flags;              /* defined in tty.h */
 310         int type;               /* UART type */
 311         struct tty_struct *tty;
 312         int read_status_mask;
 313         int ignore_status_mask;
 314         int xmit_fifo_size;
 315         int custom_divisor;
 316         int x_char;             /* xon/xoff character */
 317         int close_delay;
 318         unsigned short closing_wait;
 319         int IER;                /* Interrupt Enable Register */
 320         int MCR;                /* Modem control register */
 321         unsigned long event;
 322         int count;              /* # of fd on device */
 323         int blocked_open;       /* # of blocked opens */
 324         long session;           /* Session of opening process */
 325         long pgrp;              /* pgrp of opening process */
 326         unsigned char *xmit_buf;
 327         int xmit_head;
 328         int xmit_tail;
 329         int xmit_cnt;
 330         struct work_struct tqueue;
 331         struct termios normal_termios;
 332         struct termios callout_termios;
 333         wait_queue_head_t open_wait;
 334         wait_queue_head_t close_wait;
 335         wait_queue_head_t delta_msr_wait;
 336         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 337         int timeout;
 338         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 339         int MaxCanSetBaudRate;  /* add by Victor Yu. 09-04-2002 */
 340         int opmode_ioaddr;      /* add by Victor Yu. 01-05-2004 */
 341         unsigned char stop_rx;
 342         unsigned char ldisc_stop_rx;
 343         long realbaud;
 344         struct mxser_mon mon_data;
 345         unsigned char err_shadow;
 346         spinlock_t slock;
 347 };
 348
 349 struct mxser_mstatus {
 350         tcflag_t cflag;
 351         int cts;
 352         int dsr;
 353         int ri;
 354         int dcd;
 355 };
 356
 357 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 358
 359 static int mxserBoardCAP[MXSER_BOARDS] = {
 360         0, 0, 0, 0
 361         /*  0x180, 0x280, 0x200, 0x320 */
 362 };
 363
 364 static struct tty_driver *mxvar_sdriver;
 365 static struct mxser_struct mxvar_table[MXSER_PORTS];
 366 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 367 static struct termios *mxvar_termios[MXSER_PORTS + 1];
 368 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
 369 static struct mxser_log mxvar_log;
 370 static int mxvar_diagflag;
 371 static unsigned char mxser_msr[MXSER_PORTS + 1];
 372 static struct mxser_mon_ext mon_data_ext;
 373 static int mxser_set_baud_method[MXSER_PORTS + 1];
 374 static spinlock_t gm_lock;
 375
 376 /*
 377  * This is used to figure out the divisor speeds and the timeouts
 378  */
 379
 380 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 381
 382 /*
 383  * static functions:
 384  */
 385
 386 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 387 static int mxser_init(void);
 388
 389 /* static void   mxser_poll(unsigned long); */
 390 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 391 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 392 static void mxser_do_softint(void *);
 393 static int mxser_open(struct tty_struct *, struct file *);
 394 static void mxser_close(struct tty_struct *, struct file *);
 395 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 396 static int mxser_write_room(struct tty_struct *);
 397 static void mxser_flush_buffer(struct tty_struct *);
 398 static int mxser_chars_in_buffer(struct tty_struct *);
 399 static void mxser_flush_chars(struct tty_struct *);
 400 static void mxser_put_char(struct tty_struct *, unsigned char);
 401 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 402 static int mxser_ioctl_special(unsigned int, void __user *);
 403 static void mxser_throttle(struct tty_struct *);
 404 static void mxser_unthrottle(struct tty_struct *);
 405 static void mxser_set_termios(struct tty_struct *, struct termios *);
 406 static void mxser_stop(struct tty_struct *);
 407 static void mxser_start(struct tty_struct *);
 408 static void mxser_hangup(struct tty_struct *);
 409 static void mxser_rs_break(struct tty_struct *, int);
 410 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
 411 static void mxser_receive_chars(struct mxser_struct *, int *);
 412 static void mxser_transmit_chars(struct mxser_struct *);
 413 static void mxser_check_modem_status(struct mxser_struct *, int);
 414 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 415 static int mxser_startup(struct mxser_struct *);
 416 static void mxser_shutdown(struct mxser_struct *);
 417 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
 418 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 419 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 420 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 421 static void mxser_send_break(struct mxser_struct *, int);
 422 static int mxser_tiocmget(struct tty_struct *, struct file *);
 423 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 424 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 425 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 426
 427 static void mxser_startrx(struct tty_struct *tty);
 428 static void mxser_stoprx(struct tty_struct *tty);
 429
 430
 431 static int CheckIsMoxaMust(int io)
 432 {
 433         u8 oldmcr, hwid;
 434         int i;
 435
 436         outb(0, io + UART_LCR);
 437         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 438         oldmcr = inb(io + UART_MCR);
 439         outb(0, io + UART_MCR);
 440         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 441         if ((hwid = inb(io + UART_MCR)) != 0) {
 442                 outb(oldmcr, io + UART_MCR);
 443                 return MOXA_OTHER_UART;
 444         }
 445
 446         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 447         for (i = 0; i < UART_TYPE_NUM; i++) {
 448                 if (hwid == Gmoxa_uart_id[i])
 449                         return (int)hwid;
 450         }
 451         return MOXA_OTHER_UART;
 452 }
 453
 454 /* above is modified by Victor Yu. 08-15-2002 */
 455
 456 static const struct tty_operations mxser_ops = {
 457         .open = mxser_open,
 458         .close = mxser_close,
 459         .write = mxser_write,
 460         .put_char = mxser_put_char,
 461         .flush_chars = mxser_flush_chars,
 462         .write_room = mxser_write_room,
 463         .chars_in_buffer = mxser_chars_in_buffer,
 464         .flush_buffer = mxser_flush_buffer,
 465         .ioctl = mxser_ioctl,
 466         .throttle = mxser_throttle,
 467         .unthrottle = mxser_unthrottle,
 468         .set_termios = mxser_set_termios,
 469         .stop = mxser_stop,
 470         .start = mxser_start,
 471         .hangup = mxser_hangup,
 472         .break_ctl = mxser_rs_break,
 473         .wait_until_sent = mxser_wait_until_sent,
 474         .tiocmget = mxser_tiocmget,
 475         .tiocmset = mxser_tiocmset,
 476 };
 477
 478 /*
 479  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 480  */
 481
 482 static int __init mxser_module_init(void)
 483 {
 484         int ret;
 485
 486         if (verbose)
 487                 printk(KERN_DEBUG "Loading module mxser ...\n");
 488         ret = mxser_init();
 489         if (verbose)
 490                 printk(KERN_DEBUG "Done.\n");
 491         return ret;
 492 }
 493
 494 static void __exit mxser_module_exit(void)
 495 {
 496         int i, err;
 497
 498         if (verbose)
 499                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 500
 501         err = tty_unregister_driver(mxvar_sdriver);
 502         if (!err)
 503                 put_tty_driver(mxvar_sdriver);
 504         else
 505                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 506
 507         for (i = 0; i < MXSER_BOARDS; i++) {
 508                 struct pci_dev *pdev;
 509
 510                 if (mxsercfg[i].board_type == -1)
 511                         continue;
 512                 else {
 513                         pdev = mxsercfg[i].pciInfo.pdev;
 514                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 515                         if (pdev != NULL) {     /* PCI */
 516                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 517                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 518                                 pci_dev_put(pdev);
 519                         } else {
 520                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 521                                 release_region(mxsercfg[i].vector, 1);
 522                         }
 523                 }
 524         }
 525         if (verbose)
 526                 printk(KERN_DEBUG "Done.\n");
 527 }
 528
 529 static void process_txrx_fifo(struct mxser_struct *info)
 530 {
 531         int i;
 532
 533         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 534                 info->rx_trigger = 1;
 535                 info->rx_high_water = 1;
 536                 info->rx_low_water = 1;
 537                 info->xmit_fifo_size = 1;
 538         } else {
 539                 for (i = 0; i < UART_INFO_NUM; i++) {
 540                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 541                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 542                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 543                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 544                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 545                                 break;
 546                         }
 547                 }
 548         }
 549 }
 550
 551 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 552 {
 553         struct mxser_struct *info;
 554         int retval;
 555         int i, n;
 556
 557         n = board * MXSER_PORTS_PER_BOARD;
 558         info = &mxvar_table[n];
 559         /*if (verbose) */  {
 560                 printk(KERN_DEBUG "        ttyM%d - ttyM%d ",
 561                         n, n + hwconf->ports - 1);
 562                 printk(" max. baud rate = %d bps.\n",
 563                         hwconf->MaxCanSetBaudRate[0]);
 564         }
 565
 566         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 567                 info->port = n;
 568                 info->base = hwconf->ioaddr[i];
 569                 info->irq = hwconf->irq;
 570                 info->vector = hwconf->vector;
 571                 info->vectormask = hwconf->vector_mask;
 572                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
 573                 info->stop_rx = 0;
 574                 info->ldisc_stop_rx = 0;
 575
 576                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 577                 /* Enhance mode enabled here */
 578                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 579                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 580                 }
 581
 582                 info->flags = ASYNC_SHARE_IRQ;
 583                 info->type = hwconf->uart_type;
 584                 info->baud_base = hwconf->baud_base[i];
 585
 586                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 587
 588                 process_txrx_fifo(info);
 589
 590
 591                 info->custom_divisor = hwconf->baud_base[i] * 16;
 592                 info->close_delay = 5 * HZ / 10;
 593                 info->closing_wait = 30 * HZ;
 594                 INIT_WORK(&info->tqueue, mxser_do_softint, info);
 595                 info->normal_termios = mxvar_sdriver->init_termios;
 596                 init_waitqueue_head(&info->open_wait);
 597                 init_waitqueue_head(&info->close_wait);
 598                 init_waitqueue_head(&info->delta_msr_wait);
 599                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 600                 info->err_shadow = 0;
 601                 spin_lock_init(&info->slock);
 602         }
 603         /*
 604          * Allocate the IRQ if necessary
 605          */
 606
 607
 608         /* before set INT ISR, disable all int */
 609         for (i = 0; i < hwconf->ports; i++) {
 610                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
 611                         hwconf->ioaddr[i] + UART_IER);
 612         }
 613
 614         n = board * MXSER_PORTS_PER_BOARD;
 615         info = &mxvar_table[n];
 616
 617         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
 618                                 "mxser", info);
 619         if (retval) {
 620                 printk(KERN_ERR "Board %d: %s",
 621                         board, mxser_brdname[hwconf->board_type - 1]);
 622                 printk("  Request irq failed, IRQ (%d) may conflict with"
 623                         " another device.\n", info->irq);
 624                 return retval;
 625         }
 626         return 0;
 627 }
 628
 629 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 630 {
 631         mxsercfg[board] = *hwconf;
 632 }
 633
 634 #ifdef CONFIG_PCI
 635 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 636 {
 637         int i, j;
 638         /* unsigned int val; */
 639         unsigned int ioaddress;
 640         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 641
 642         /* io address */
 643         hwconf->board_type = board_type;
 644         hwconf->ports = mxser_numports[board_type - 1];
 645         ioaddress = pci_resource_start(pdev, 2);
 646         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
 647                         "mxser(IO)");
 648
 649         for (i = 0; i < hwconf->ports; i++)
 650                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 651
 652         /* vector */
 653         ioaddress = pci_resource_start(pdev, 3);
 654         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
 655                         "mxser(vector)");
 656         hwconf->vector = ioaddress;
 657
 658         /* irq */
 659         hwconf->irq = hwconf->pciInfo.pdev->irq;
 660
 661         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 662         hwconf->uart_type = PORT_16550A;
 663         hwconf->vector_mask = 0;
 664
 665
 666         for (i = 0; i < hwconf->ports; i++) {
 667                 for (j = 0; j < UART_INFO_NUM; j++) {
 668                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 669                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 670
 671                                 /* exception....CP-102 */
 672                                 if (board_type == MXSER_BOARD_CP102)
 673                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 674                                 break;
 675                         }
 676                 }
 677         }
 678
 679         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 680                 for (i = 0; i < hwconf->ports; i++) {
 681                         if (i < 4)
 682                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 683                         else
 684                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 685                 }
 686                 outb(0, ioaddress + 4); /* default set to RS232 mode */
 687                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
 688         }
 689
 690         for (i = 0; i < hwconf->ports; i++) {
 691                 hwconf->vector_mask |= (1 << i);
 692                 hwconf->baud_base[i] = 921600;
 693         }
 694         return 0;
 695 }
 696 #endif
 697
 698 static int mxser_init(void)
 699 {
 700         int i, m, retval, b, n;
 701         struct pci_dev *pdev = NULL;
 702         int index;
 703         unsigned char busnum, devnum;
 704         struct mxser_hwconf hwconf;
 705
 706         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 707         if (!mxvar_sdriver)
 708                 return -ENOMEM;
 709         spin_lock_init(&gm_lock);
 710
 711         for (i = 0; i < MXSER_BOARDS; i++) {
 712                 mxsercfg[i].board_type = -1;
 713         }
 714
 715         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
 716                 MXSER_VERSION);
 717
 718         /* Initialize the tty_driver structure */
 719         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 720         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 721         mxvar_sdriver->name = "ttyM";
 722         mxvar_sdriver->major = ttymajor;
 723         mxvar_sdriver->minor_start = 0;
 724         mxvar_sdriver->num = MXSER_PORTS + 1;
 725         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 726         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 727         mxvar_sdriver->init_termios = tty_std_termios;
 728         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 729         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 730         tty_set_operations(mxvar_sdriver, &mxser_ops);
 731         mxvar_sdriver->ttys = mxvar_tty;
 732         mxvar_sdriver->termios = mxvar_termios;
 733         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 734
 735         mxvar_diagflag = 0;
 736         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 737         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 738
 739         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 740         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 741         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 742         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 743
 744         m = 0;
 745         /* Start finding ISA boards here */
 746         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 747                 int cap;
 748
 749                 if (!(cap = mxserBoardCAP[b]))
 750                         continue;
 751
 752                 retval = mxser_get_ISA_conf(cap, &hwconf);
 753
 754                 if (retval != 0)
 755                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 756                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 757
 758                 if (retval <= 0) {
 759                         if (retval == MXSER_ERR_IRQ)
 760                                 printk(KERN_ERR "Invalid interrupt number, "
 761                                         "board not configured\n");
 762                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 763                                 printk(KERN_ERR "Invalid interrupt number, "
 764                                         "board not configured\n");
 765                         else if (retval == MXSER_ERR_VECTOR)
 766                                 printk(KERN_ERR "Invalid interrupt vector, "
 767                                         "board not configured\n");
 768                         else if (retval == MXSER_ERR_IOADDR)
 769                                 printk(KERN_ERR "Invalid I/O address, "
 770                                         "board not configured\n");
 771
 772                         continue;
 773                 }
 774
 775                 hwconf.pciInfo.busNum = 0;
 776                 hwconf.pciInfo.devNum = 0;
 777                 hwconf.pciInfo.pdev = NULL;
 778
 779                 mxser_getcfg(m, &hwconf);
 780                 /*
 781                  * init mxsercfg first,
 782                  * or mxsercfg data is not correct on ISR.
 783                  */
 784                 /* mxser_initbrd will hook ISR. */
 785                 if (mxser_initbrd(m, &hwconf) < 0)
 786                         continue;
 787
 788                 m++;
 789         }
 790
 791         /* Start finding ISA boards from module arg */
 792         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 793                 int cap;
 794
 795                 if (!(cap = ioaddr[b]))
 796                         continue;
 797
 798                 retval = mxser_get_ISA_conf(cap, &hwconf);
 799
 800                 if (retval != 0)
 801                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 802                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 803
 804                 if (retval <= 0) {
 805                         if (retval == MXSER_ERR_IRQ)
 806                                 printk(KERN_ERR "Invalid interrupt number, "
 807                                         "board not configured\n");
 808                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 809                                 printk(KERN_ERR "Invalid interrupt number, "
 810                                         "board not configured\n");
 811                         else if (retval == MXSER_ERR_VECTOR)
 812                                 printk(KERN_ERR "Invalid interrupt vector, "
 813                                         "board not configured\n");
 814                         else if (retval == MXSER_ERR_IOADDR)
 815                                 printk(KERN_ERR "Invalid I/O address, "
 816                                         "board not configured\n");
 817
 818                         continue;
 819                 }
 820
 821                 hwconf.pciInfo.busNum = 0;
 822                 hwconf.pciInfo.devNum = 0;
 823                 hwconf.pciInfo.pdev = NULL;
 824
 825                 mxser_getcfg(m, &hwconf);
 826                 /*
 827                  * init mxsercfg first,
 828                  * or mxsercfg data is not correct on ISR.
 829                  */
 830                 /* mxser_initbrd will hook ISR. */
 831                 if (mxser_initbrd(m, &hwconf) < 0)
 832                         continue;
 833
 834                 m++;
 835         }
 836
 837         /* start finding PCI board here */
 838 #ifdef CONFIG_PCI
 839         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 840         index = 0;
 841         b = 0;
 842         while (b < n) {
 843                 pdev = pci_get_device(mxser_pcibrds[b].vendor,
 844                                 mxser_pcibrds[b].device, pdev);
 845                 if (pdev == NULL) {
 846                         b++;
 847                         continue;
 848                 }
 849                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 850                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 851                 hwconf.pciInfo.pdev = pdev;
 852                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
 853                         mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
 854                         busnum, devnum >> 3);
 855                 index++;
 856                 if (m >= MXSER_BOARDS)
 857                         printk(KERN_ERR
 858                                 "Too many Smartio/Industio family boards find "
 859                                 "(maximum %d), board not configured\n",
 860                                 MXSER_BOARDS);
 861                 else {
 862                         if (pci_enable_device(pdev)) {
 863                                 printk(KERN_ERR "Moxa SmartI/O PCI enable "
 864                                         "fail !\n");
 865                                 continue;
 866                         }
 867                         retval = mxser_get_PCI_conf(busnum, devnum,
 868                                         (int)mxser_pcibrds[b].driver_data,
 869                                         &hwconf);
 870                         if (retval < 0) {
 871                                 if (retval == MXSER_ERR_IRQ)
 872                                         printk(KERN_ERR
 873                                                 "Invalid interrupt number, "
 874                                                 "board not configured\n");
 875                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 876                                         printk(KERN_ERR
 877                                                 "Invalid interrupt number, "
 878                                                 "board not configured\n");
 879                                 else if (retval == MXSER_ERR_VECTOR)
 880                                         printk(KERN_ERR
 881                                                 "Invalid interrupt vector, "
 882                                                 "board not configured\n");
 883                                 else if (retval == MXSER_ERR_IOADDR)
 884                                         printk(KERN_ERR
 885                                                 "Invalid I/O address, "
 886                                                 "board not configured\n");
 887                                 continue;
 888                         }
 889                         mxser_getcfg(m, &hwconf);
 890                         /* init mxsercfg first,
 891                          * or mxsercfg data is not correct on ISR.
 892                          */
 893                         /* mxser_initbrd will hook ISR. */
 894                         if (mxser_initbrd(m, &hwconf) < 0)
 895                                 continue;
 896                         m++;
 897                         /* Keep an extra reference if we succeeded. It will
 898                            be returned at unload time */
 899                         pci_dev_get(pdev);
 900                 }
 901         }
 902 #endif
 903
 904         retval = tty_register_driver(mxvar_sdriver);
 905         if (retval) {
 906                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
 907                                 " driver !\n");
 908                 put_tty_driver(mxvar_sdriver);
 909
 910                 for (i = 0; i < MXSER_BOARDS; i++) {
 911                         if (mxsercfg[i].board_type == -1)
 912                                 continue;
 913                         else {
 914                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 915                                 /* todo: release io, vector */
 916                         }
 917                 }
 918                 return retval;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static void mxser_do_softint(void *private_)
 925 {
 926         struct mxser_struct *info = private_;
 927         struct tty_struct *tty;
 928
 929         tty = info->tty;
 930
 931         if (tty) {
 932                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 933                         tty_wakeup(tty);
 934                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 935                         tty_hangup(tty);
 936         }
 937 }
 938
 939 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 940 {
 941         unsigned char status = 0;
 942
 943         status = inb(baseaddr + UART_MSR);
 944
 945         mxser_msr[port] &= 0x0F;
 946         mxser_msr[port] |= status;
 947         status = mxser_msr[port];
 948         if (mode)
 949                 mxser_msr[port] = 0;
 950
 951         return status;
 952 }
 953
 954 /*
 955  * This routine is called whenever a serial port is opened.  It
 956  * enables interrupts for a serial port, linking in its async structure into
 957  * the IRQ chain.   It also performs the serial-specific
 958  * initialization for the tty structure.
 959  */
 960 static int mxser_open(struct tty_struct *tty, struct file *filp)
 961 {
 962         struct mxser_struct *info;
 963         int retval, line;
 964
 965         /* initialize driver_data in case something fails */
 966         tty->driver_data = NULL;
 967
 968         line = tty->index;
 969         if (line == MXSER_PORTS)
 970                 return 0;
 971         if (line < 0 || line > MXSER_PORTS)
 972                 return -ENODEV;
 973         info = mxvar_table + line;
 974         if (!info->base)
 975                 return -ENODEV;
 976
 977         tty->driver_data = info;
 978         info->tty = tty;
 979         /*
 980          * Start up serial port
 981          */
 982         retval = mxser_startup(info);
 983         if (retval)
 984                 return retval;
 985
 986         retval = mxser_block_til_ready(tty, filp, info);
 987         if (retval)
 988                 return retval;
 989
 990         info->count++;
 991
 992         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 993                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 994                         *tty->termios = info->normal_termios;
 995                 else
 996                         *tty->termios = info->callout_termios;
 997                 mxser_change_speed(info, NULL);
 998         }
 999
1000         info->session = current->signal->session;
1001         info->pgrp = process_group(current);
1002
1003         /*
1004         status = mxser_get_msr(info->base, 0, info->port);
1005         mxser_check_modem_status(info, status);
1006         */
1007
1008 /* unmark here for very high baud rate (ex. 921600 bps) used */
1009         tty->low_latency = 1;
1010         return 0;
1011 }
1012
1013 /*
1014  * This routine is called when the serial port gets closed.  First, we
1015  * wait for the last remaining data to be sent.  Then, we unlink its
1016  * async structure from the interrupt chain if necessary, and we free
1017  * that IRQ if nothing is left in the chain.
1018  */
1019 static void mxser_close(struct tty_struct *tty, struct file *filp)
1020 {
1021         struct mxser_struct *info = tty->driver_data;
1022
1023         unsigned long timeout;
1024         unsigned long flags;
1025         struct tty_ldisc *ld;
1026
1027         if (tty->index == MXSER_PORTS)
1028                 return;
1029         if (!info)
1030                 return;
1031
1032         spin_lock_irqsave(&info->slock, flags);
1033
1034         if (tty_hung_up_p(filp)) {
1035                 spin_unlock_irqrestore(&info->slock, flags);
1036                 return;
1037         }
1038         if ((tty->count == 1) && (info->count != 1)) {
1039                 /*
1040                  * Uh, oh.  tty->count is 1, which means that the tty
1041                  * structure will be freed.  Info->count should always
1042                  * be one in these conditions.  If it's greater than
1043                  * one, we've got real problems, since it means the
1044                  * serial port won't be shutdown.
1045                  */
1046                 printk(KERN_ERR "mxser_close: bad serial port count; "
1047                         "tty->count is 1, info->count is %d\n", info->count);
1048                 info->count = 1;
1049         }
1050         if (--info->count < 0) {
1051                 printk(KERN_ERR "mxser_close: bad serial port count for "
1052                         "ttys%d: %d\n", info->port, info->count);
1053                 info->count = 0;
1054         }
1055         if (info->count) {
1056                 spin_unlock_irqrestore(&info->slock, flags);
1057                 return;
1058         }
1059         info->flags |= ASYNC_CLOSING;
1060         spin_unlock_irqrestore(&info->slock, flags);
1061         /*
1062          * Save the termios structure, since this port may have
1063          * separate termios for callout and dialin.
1064          */
1065         if (info->flags & ASYNC_NORMAL_ACTIVE)
1066                 info->normal_termios = *tty->termios;
1067         /*
1068          * Now we wait for the transmit buffer to clear; and we notify
1069          * the line discipline to only process XON/XOFF characters.
1070          */
1071         tty->closing = 1;
1072         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1073                 tty_wait_until_sent(tty, info->closing_wait);
1074         /*
1075          * At this point we stop accepting input.  To do this, we
1076          * disable the receive line status interrupts, and tell the
1077          * interrupt driver to stop checking the data ready bit in the
1078          * line status register.
1079          */
1080         info->IER &= ~UART_IER_RLSI;
1081         if (info->IsMoxaMustChipFlag)
1082                 info->IER &= ~MOXA_MUST_RECV_ISR;
1083 /* by William
1084         info->read_status_mask &= ~UART_LSR_DR;
1085 */
1086         if (info->flags & ASYNC_INITIALIZED) {
1087                 outb(info->IER, info->base + UART_IER);
1088                 /*
1089                  * Before we drop DTR, make sure the UART transmitter
1090                  * has completely drained; this is especially
1091                  * important if there is a transmit FIFO!
1092                  */
1093                 timeout = jiffies + HZ;
1094                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1095                         schedule_timeout_interruptible(5);
1096                         if (time_after(jiffies, timeout))
1097                                 break;
1098                 }
1099         }
1100         mxser_shutdown(info);
1101
1102         if (tty->driver->flush_buffer)
1103                 tty->driver->flush_buffer(tty);
1104
1105         ld = tty_ldisc_ref(tty);
1106         if (ld) {
1107                 if (ld->flush_buffer)
1108                         ld->flush_buffer(tty);
1109                 tty_ldisc_deref(ld);
1110         }
1111
1112         tty->closing = 0;
1113         info->event = 0;
1114         info->tty = NULL;
1115         if (info->blocked_open) {
1116                 if (info->close_delay)
1117                         schedule_timeout_interruptible(info->close_delay);
1118                 wake_up_interruptible(&info->open_wait);
1119         }
1120
1121         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1122         wake_up_interruptible(&info->close_wait);
1123
1124 }
1125
1126 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1127 {
1128         int c, total = 0;
1129         struct mxser_struct *info = tty->driver_data;
1130         unsigned long flags;
1131
1132         if (!info->xmit_buf)
1133                 return 0;
1134
1135         while (1) {
1136                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1137                                           SERIAL_XMIT_SIZE - info->xmit_head));
1138                 if (c <= 0)
1139                         break;
1140
1141                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1142                 spin_lock_irqsave(&info->slock, flags);
1143                 info->xmit_head = (info->xmit_head + c) &
1144                                   (SERIAL_XMIT_SIZE - 1);
1145                 info->xmit_cnt += c;
1146                 spin_unlock_irqrestore(&info->slock, flags);
1147
1148                 buf += c;
1149                 count -= c;
1150                 total += c;
1151         }
1152
1153         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1154                 if (!tty->hw_stopped ||
1155                                 (info->type == PORT_16550A) ||
1156                                 (info->IsMoxaMustChipFlag)) {
1157                         spin_lock_irqsave(&info->slock, flags);
1158                         info->IER |= UART_IER_THRI;
1159                         outb(info->IER, info->base + UART_IER);
1160                         spin_unlock_irqrestore(&info->slock, flags);
1161                 }
1162         }
1163         return total;
1164 }
1165
1166 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1167 {
1168         struct mxser_struct *info = tty->driver_data;
1169         unsigned long flags;
1170
1171         if (!info->xmit_buf)
1172                 return;
1173
1174         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1175                 return;
1176
1177         spin_lock_irqsave(&info->slock, flags);
1178         info->xmit_buf[info->xmit_head++] = ch;
1179         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1180         info->xmit_cnt++;
1181         spin_unlock_irqrestore(&info->slock, flags);
1182         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1183                 if (!tty->hw_stopped ||
1184                                 (info->type == PORT_16550A) ||
1185                                 info->IsMoxaMustChipFlag) {
1186                         spin_lock_irqsave(&info->slock, flags);
1187                         info->IER |= UART_IER_THRI;
1188                         outb(info->IER, info->base + UART_IER);
1189                         spin_unlock_irqrestore(&info->slock, flags);
1190                 }
1191         }
1192 }
1193
1194
1195 static void mxser_flush_chars(struct tty_struct *tty)
1196 {
1197         struct mxser_struct *info = tty->driver_data;
1198         unsigned long flags;
1199
1200         if (info->xmit_cnt <= 0 ||
1201                         tty->stopped ||
1202                         !info->xmit_buf ||
1203                         (tty->hw_stopped &&
1204                          (info->type != PORT_16550A) &&
1205                          (!info->IsMoxaMustChipFlag)
1206                         ))
1207                 return;
1208
1209         spin_lock_irqsave(&info->slock, flags);
1210
1211         info->IER |= UART_IER_THRI;
1212         outb(info->IER, info->base + UART_IER);
1213
1214         spin_unlock_irqrestore(&info->slock, flags);
1215 }
1216
1217 static int mxser_write_room(struct tty_struct *tty)
1218 {
1219         struct mxser_struct *info = tty->driver_data;
1220         int ret;
1221
1222         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1223         if (ret < 0)
1224                 ret = 0;
1225         return ret;
1226 }
1227
1228 static int mxser_chars_in_buffer(struct tty_struct *tty)
1229 {
1230         struct mxser_struct *info = tty->driver_data;
1231         return info->xmit_cnt;
1232 }
1233
1234 static void mxser_flush_buffer(struct tty_struct *tty)
1235 {
1236         struct mxser_struct *info = tty->driver_data;
1237         char fcr;
1238         unsigned long flags;
1239
1240
1241         spin_lock_irqsave(&info->slock, flags);
1242         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1243
1244         /* below added by shinhay */
1245         fcr = inb(info->base + UART_FCR);
1246         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1247                 info->base + UART_FCR);
1248         outb(fcr, info->base + UART_FCR);
1249
1250         spin_unlock_irqrestore(&info->slock, flags);
1251         /* above added by shinhay */
1252
1253         wake_up_interruptible(&tty->write_wait);
1254         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1255                 (tty->ldisc.write_wakeup) (tty);
1256 }
1257
1258 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1259 {
1260         struct mxser_struct *info = tty->driver_data;
1261         int retval;
1262         struct async_icount cprev, cnow;        /* kernel counter temps */
1263         struct serial_icounter_struct __user *p_cuser;
1264         unsigned long templ;
1265         unsigned long flags;
1266         void __user *argp = (void __user *)arg;
1267
1268         if (tty->index == MXSER_PORTS)
1269                 return mxser_ioctl_special(cmd, argp);
1270
1271         /* following add by Victor Yu. 01-05-2004 */
1272         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1273                 int opmode, p;
1274                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1275                 int shiftbit;
1276                 unsigned char val, mask;
1277
1278                 p = info->port % 4;
1279                 if (cmd == MOXA_SET_OP_MODE) {
1280                         if (get_user(opmode, (int __user *) argp))
1281                                 return -EFAULT;
1282                         if (opmode != RS232_MODE &&
1283                                         opmode != RS485_2WIRE_MODE &&
1284                                         opmode != RS422_MODE &&
1285                                         opmode != RS485_4WIRE_MODE)
1286                                 return -EFAULT;
1287                         mask = ModeMask[p];
1288                         shiftbit = p * 2;
1289                         val = inb(info->opmode_ioaddr);
1290                         val &= mask;
1291                         val |= (opmode << shiftbit);
1292                         outb(val, info->opmode_ioaddr);
1293                 } else {
1294                         shiftbit = p * 2;
1295                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1296                         opmode &= OP_MODE_MASK;
1297                         if (copy_to_user(argp, &opmode, sizeof(int)))
1298                                 return -EFAULT;
1299                 }
1300                 return 0;
1301         }
1302         /* above add by Victor Yu. 01-05-2004 */
1303
1304         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1305                 if (tty->flags & (1 << TTY_IO_ERROR))
1306                         return -EIO;
1307         }
1308         switch (cmd) {
1309         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1310                 retval = tty_check_change(tty);
1311                 if (retval)
1312                         return retval;
1313                 tty_wait_until_sent(tty, 0);
1314                 if (!arg)
1315                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1316                 return 0;
1317         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1318                 retval = tty_check_change(tty);
1319                 if (retval)
1320                         return retval;
1321                 tty_wait_until_sent(tty, 0);
1322                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1323                 return 0;
1324         case TIOCGSOFTCAR:
1325                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1326         case TIOCSSOFTCAR:
1327                 if (get_user(templ, (unsigned long __user *) argp))
1328                         return -EFAULT;
1329                 arg = templ;
1330                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1331                 return 0;
1332         case TIOCGSERIAL:
1333                 return mxser_get_serial_info(info, argp);
1334         case TIOCSSERIAL:
1335                 return mxser_set_serial_info(info, argp);
1336         case TIOCSERGETLSR:     /* Get line status register */
1337                 return mxser_get_lsr_info(info, argp);
1338                 /*
1339                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1340                  * - mask passed in arg for lines of interest
1341                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1342                  * Caller should use TIOCGICOUNT to see which one it was
1343                  */
1344         case TIOCMIWAIT: {
1345                         DECLARE_WAITQUEUE(wait, current);
1346                         int ret;
1347                         spin_lock_irqsave(&info->slock, flags);
1348                         cprev = info->icount;   /* note the counters on entry */
1349                         spin_unlock_irqrestore(&info->slock, flags);
1350
1351                         add_wait_queue(&info->delta_msr_wait, &wait);
1352                         while (1) {
1353                                 spin_lock_irqsave(&info->slock, flags);
1354                                 cnow = info->icount;    /* atomic copy */
1355                                 spin_unlock_irqrestore(&info->slock, flags);
1356
1357                                 set_current_state(TASK_INTERRUPTIBLE);
1358                                 if (((arg & TIOCM_RNG) &&
1359                                                 (cnow.rng != cprev.rng)) ||
1360                                                 ((arg & TIOCM_DSR) &&
1361                                                 (cnow.dsr != cprev.dsr)) ||
1362                                                 ((arg & TIOCM_CD) &&
1363                                                 (cnow.dcd != cprev.dcd)) ||
1364                                                 ((arg & TIOCM_CTS) &&
1365                                                 (cnow.cts != cprev.cts))) {
1366                                         ret = 0;
1367                                         break;
1368                                 }
1369                                 /* see if a signal did it */
1370                                 if (signal_pending(current)) {
1371                                         ret = -ERESTARTSYS;
1372                                         break;
1373                                 }
1374                                 cprev = cnow;
1375                         }
1376                         current->state = TASK_RUNNING;
1377                         remove_wait_queue(&info->delta_msr_wait, &wait);
1378                         break;
1379                 }
1380                 /* NOTREACHED */
1381                 /*
1382                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1383                  * Return: write counters to the user passed counter struct
1384                  * NB: both 1->0 and 0->1 transitions are counted except for
1385                  *     RI where only 0->1 is counted.
1386                  */
1387         case TIOCGICOUNT:
1388                 spin_lock_irqsave(&info->slock, flags);
1389                 cnow = info->icount;
1390                 spin_unlock_irqrestore(&info->slock, flags);
1391                 p_cuser = argp;
1392                 /* modified by casper 1/11/2000 */
1393                 if (put_user(cnow.frame, &p_cuser->frame))
1394                         return -EFAULT;
1395                 if (put_user(cnow.brk, &p_cuser->brk))
1396                         return -EFAULT;
1397                 if (put_user(cnow.overrun, &p_cuser->overrun))
1398                         return -EFAULT;
1399                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1400                         return -EFAULT;
1401                 if (put_user(cnow.parity, &p_cuser->parity))
1402                         return -EFAULT;
1403                 if (put_user(cnow.rx, &p_cuser->rx))
1404                         return -EFAULT;
1405                 if (put_user(cnow.tx, &p_cuser->tx))
1406                         return -EFAULT;
1407                 put_user(cnow.cts, &p_cuser->cts);
1408                 put_user(cnow.dsr, &p_cuser->dsr);
1409                 put_user(cnow.rng, &p_cuser->rng);
1410                 put_user(cnow.dcd, &p_cuser->dcd);
1411                 return 0;
1412         case MOXA_HighSpeedOn:
1413                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1414         case MOXA_SDS_RSTICOUNTER: {
1415                         info->mon_data.rxcnt = 0;
1416                         info->mon_data.txcnt = 0;
1417                         return 0;
1418                 }
1419 /* (above) added by James. */
1420         case MOXA_ASPP_SETBAUD:{
1421                         long baud;
1422                         if (get_user(baud, (long __user *)argp))
1423                                 return -EFAULT;
1424                         mxser_set_baud(info, baud);
1425                         return 0;
1426                 }
1427         case MOXA_ASPP_GETBAUD:
1428                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1429                         return -EFAULT;
1430
1431                 return 0;
1432
1433         case MOXA_ASPP_OQUEUE:{
1434                         int len, lsr;
1435
1436                         len = mxser_chars_in_buffer(tty);
1437
1438                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1439
1440                         len += (lsr ? 0 : 1);
1441
1442                         if (copy_to_user(argp, &len, sizeof(int)))
1443                                 return -EFAULT;
1444
1445                         return 0;
1446                 }
1447         case MOXA_ASPP_MON: {
1448                         int mcr, status;
1449
1450                         /* info->mon_data.ser_param = tty->termios->c_cflag; */
1451
1452                         status = mxser_get_msr(info->base, 1, info->port, info);
1453                         mxser_check_modem_status(info, status);
1454
1455                         mcr = inb(info->base + UART_MCR);
1456                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1457                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1458                         else
1459                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1460
1461                         if (mcr & MOXA_MUST_MCR_TX_XON)
1462                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1463                         else
1464                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1465
1466                         if (info->tty->hw_stopped)
1467                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1468                         else
1469                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1470
1471                         if (copy_to_user(argp, &info->mon_data,
1472                                         sizeof(struct mxser_mon)))
1473                                 return -EFAULT;
1474
1475                         return 0;
1476                 }
1477
1478         case MOXA_ASPP_LSTATUS: {
1479                         if (copy_to_user(argp, &info->err_shadow,
1480                                         sizeof(unsigned char)))
1481                                 return -EFAULT;
1482
1483                         info->err_shadow = 0;
1484                         return 0;
1485                 }
1486         case MOXA_SET_BAUD_METHOD: {
1487                         int method;
1488
1489                         if (get_user(method, (int __user *)argp))
1490                                 return -EFAULT;
1491                         mxser_set_baud_method[info->port] = method;
1492                         if (copy_to_user(argp, &method, sizeof(int)))
1493                                 return -EFAULT;
1494
1495                         return 0;
1496                 }
1497         default:
1498                 return -ENOIOCTLCMD;
1499         }
1500         return 0;
1501 }
1502
1503 #ifndef CMSPAR
1504 #define CMSPAR 010000000000
1505 #endif
1506
1507 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1508 {
1509         int i, result, status;
1510
1511         switch (cmd) {
1512         case MOXA_GET_CONF:
1513                 if (copy_to_user(argp, mxsercfg,
1514                                 sizeof(struct mxser_hwconf) * 4))
1515                         return -EFAULT;
1516                 return 0;
1517         case MOXA_GET_MAJOR:
1518                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1519                         return -EFAULT;
1520                 return 0;
1521
1522         case MOXA_GET_CUMAJOR:
1523                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1524                         return -EFAULT;
1525                 return 0;
1526
1527         case MOXA_CHKPORTENABLE:
1528                 result = 0;
1529                 for (i = 0; i < MXSER_PORTS; i++) {
1530                         if (mxvar_table[i].base)
1531                                 result |= (1 << i);
1532                 }
1533                 return put_user(result, (unsigned long __user *)argp);
1534         case MOXA_GETDATACOUNT:
1535                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1536                         return -EFAULT;
1537                 return 0;
1538         case MOXA_GETMSTATUS:
1539                 for (i = 0; i < MXSER_PORTS; i++) {
1540                         GMStatus[i].ri = 0;
1541                         if (!mxvar_table[i].base) {
1542                                 GMStatus[i].dcd = 0;
1543                                 GMStatus[i].dsr = 0;
1544                                 GMStatus[i].cts = 0;
1545                                 continue;
1546                         }
1547
1548                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1549                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1550                         else
1551                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1552
1553                         status = inb(mxvar_table[i].base + UART_MSR);
1554                         if (status & 0x80 /*UART_MSR_DCD */ )
1555                                 GMStatus[i].dcd = 1;
1556                         else
1557                                 GMStatus[i].dcd = 0;
1558
1559                         if (status & 0x20 /*UART_MSR_DSR */ )
1560                                 GMStatus[i].dsr = 1;
1561                         else
1562                                 GMStatus[i].dsr = 0;
1563
1564
1565                         if (status & 0x10 /*UART_MSR_CTS */ )
1566                                 GMStatus[i].cts = 1;
1567                         else
1568                                 GMStatus[i].cts = 0;
1569                 }
1570                 if (copy_to_user(argp, GMStatus,
1571                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1572                         return -EFAULT;
1573                 return 0;
1574         case MOXA_ASPP_MON_EXT: {
1575                         int status;
1576                         int opmode, p;
1577                         int shiftbit;
1578                         unsigned cflag, iflag;
1579
1580                         for (i = 0; i < MXSER_PORTS; i++) {
1581                                 if (!mxvar_table[i].base)
1582                                         continue;
1583
1584                                 status = mxser_get_msr(mxvar_table[i].base, 0,
1585                                                         i, &(mxvar_table[i]));
1586                                 /*
1587                                 mxser_check_modem_status(&mxvar_table[i],
1588                                                                 status);
1589                                 */
1590                                 if (status & UART_MSR_TERI)
1591                                         mxvar_table[i].icount.rng++;
1592                                 if (status & UART_MSR_DDSR)
1593                                         mxvar_table[i].icount.dsr++;
1594                                 if (status & UART_MSR_DDCD)
1595                                         mxvar_table[i].icount.dcd++;
1596                                 if (status & UART_MSR_DCTS)
1597                                         mxvar_table[i].icount.cts++;
1598
1599                                 mxvar_table[i].mon_data.modem_status = status;
1600                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1601                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1602                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1603                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1604                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1605                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1606
1607                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1608                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1609                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1610                                 } else {
1611                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1612                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1613                                 }
1614
1615                                 mon_data_ext.databits[i] = cflag & CSIZE;
1616
1617                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1618
1619                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1620
1621                                 mon_data_ext.flowctrl[i] = 0x00;
1622
1623                                 if (cflag & CRTSCTS)
1624                                         mon_data_ext.flowctrl[i] |= 0x03;
1625
1626                                 if (iflag & (IXON | IXOFF))
1627                                         mon_data_ext.flowctrl[i] |= 0x0C;
1628
1629                                 if (mxvar_table[i].type == PORT_16550A)
1630                                         mon_data_ext.fifo[i] = 1;
1631                                 else
1632                                         mon_data_ext.fifo[i] = 0;
1633
1634                                 p = i % 4;
1635                                 shiftbit = p * 2;
1636                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1637                                 opmode &= OP_MODE_MASK;
1638
1639                                 mon_data_ext.iftype[i] = opmode;
1640
1641                         }
1642                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1643                                 return -EFAULT;
1644
1645                         return 0;
1646
1647                 }
1648         default:
1649                 return -ENOIOCTLCMD;
1650         }
1651         return 0;
1652 }
1653
1654 static void mxser_stoprx(struct tty_struct *tty)
1655 {
1656         struct mxser_struct *info = tty->driver_data;
1657         /* unsigned long flags; */
1658
1659         info->ldisc_stop_rx = 1;
1660         if (I_IXOFF(tty)) {
1661                 /* MX_LOCK(&info->slock); */
1662                 /* following add by Victor Yu. 09-02-2002 */
1663                 if (info->IsMoxaMustChipFlag) {
1664                         info->IER &= ~MOXA_MUST_RECV_ISR;
1665                         outb(info->IER, info->base + UART_IER);
1666                 } else {
1667                         /* above add by Victor Yu. 09-02-2002 */
1668                         info->x_char = STOP_CHAR(tty);
1669                         /* mask by Victor Yu. 09-02-2002 */
1670                         /* outb(info->IER, 0); */
1671                         outb(0, info->base + UART_IER);
1672                         info->IER |= UART_IER_THRI;
1673                         /* force Tx interrupt */
1674                         outb(info->IER, info->base + UART_IER);
1675                 }               /* add by Victor Yu. 09-02-2002 */
1676                 /* MX_UNLOCK(&info->slock); */
1677         }
1678
1679         if (info->tty->termios->c_cflag & CRTSCTS) {
1680                 /* MX_LOCK(&info->slock); */
1681                 info->MCR &= ~UART_MCR_RTS;
1682                 outb(info->MCR, info->base + UART_MCR);
1683                 /* MX_UNLOCK(&info->slock); */
1684         }
1685 }
1686
1687 static void mxser_startrx(struct tty_struct *tty)
1688 {
1689         struct mxser_struct *info = tty->driver_data;
1690         /* unsigned long flags; */
1691
1692         info->ldisc_stop_rx = 0;
1693         if (I_IXOFF(tty)) {
1694                 if (info->x_char)
1695                         info->x_char = 0;
1696                 else {
1697                         /* MX_LOCK(&info->slock); */
1698
1699                         /* following add by Victor Yu. 09-02-2002 */
1700                         if (info->IsMoxaMustChipFlag) {
1701                                 info->IER |= MOXA_MUST_RECV_ISR;
1702                                 outb(info->IER, info->base + UART_IER);
1703                         } else {
1704                                 /* above add by Victor Yu. 09-02-2002 */
1705
1706                                 info->x_char = START_CHAR(tty);
1707                                 /* mask by Victor Yu. 09-02-2002 */
1708                                 /* outb(info->IER, 0); */
1709                                 /* add by Victor Yu. 09-02-2002 */
1710                                 outb(0, info->base + UART_IER);
1711                                 /* force Tx interrupt */
1712                                 info->IER |= UART_IER_THRI;
1713                                 outb(info->IER, info->base + UART_IER);
1714                         }       /* add by Victor Yu. 09-02-2002 */
1715                         /* MX_UNLOCK(&info->slock); */
1716                 }
1717         }
1718
1719         if (info->tty->termios->c_cflag & CRTSCTS) {
1720                 /* MX_LOCK(&info->slock); */
1721                 info->MCR |= UART_MCR_RTS;
1722                 outb(info->MCR, info->base + UART_MCR);
1723                 /* MX_UNLOCK(&info->slock); */
1724         }
1725 }
1726
1727 /*
1728  * This routine is called by the upper-layer tty layer to signal that
1729  * incoming characters should be throttled.
1730  */
1731 static void mxser_throttle(struct tty_struct *tty)
1732 {
1733         /* struct mxser_struct *info = tty->driver_data; */
1734         /* unsigned long flags; */
1735
1736         /* MX_LOCK(&info->slock); */
1737         mxser_stoprx(tty);
1738         /* MX_UNLOCK(&info->slock); */
1739 }
1740
1741 static void mxser_unthrottle(struct tty_struct *tty)
1742 {
1743         /* struct mxser_struct *info = tty->driver_data; */
1744         /* unsigned long flags; */
1745
1746         /* MX_LOCK(&info->slock); */
1747         mxser_startrx(tty);
1748         /* MX_UNLOCK(&info->slock); */
1749 }
1750
1751 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1752 {
1753         struct mxser_struct *info = tty->driver_data;
1754         unsigned long flags;
1755
1756         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1757                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1758
1759                 mxser_change_speed(info, old_termios);
1760
1761                 if ((old_termios->c_cflag & CRTSCTS) &&
1762                                 !(tty->termios->c_cflag & CRTSCTS)) {
1763                         tty->hw_stopped = 0;
1764                         mxser_start(tty);
1765                 }
1766         }
1767
1768 /* Handle sw stopped */
1769         if ((old_termios->c_iflag & IXON) &&
1770                         !(tty->termios->c_iflag & IXON)) {
1771                 tty->stopped = 0;
1772
1773                 /* following add by Victor Yu. 09-02-2002 */
1774                 if (info->IsMoxaMustChipFlag) {
1775                         spin_lock_irqsave(&info->slock, flags);
1776                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1777                         spin_unlock_irqrestore(&info->slock, flags);
1778                 }
1779                 /* above add by Victor Yu. 09-02-2002 */
1780
1781                 mxser_start(tty);
1782         }
1783 }
1784
1785 /*
1786  * mxser_stop() and mxser_start()
1787  *
1788  * This routines are called before setting or resetting tty->stopped.
1789  * They enable or disable transmitter interrupts, as necessary.
1790  */
1791 static void mxser_stop(struct tty_struct *tty)
1792 {
1793         struct mxser_struct *info = tty->driver_data;
1794         unsigned long flags;
1795
1796         spin_lock_irqsave(&info->slock, flags);
1797         if (info->IER & UART_IER_THRI) {
1798                 info->IER &= ~UART_IER_THRI;
1799                 outb(info->IER, info->base + UART_IER);
1800         }
1801         spin_unlock_irqrestore(&info->slock, flags);
1802 }
1803
1804 static void mxser_start(struct tty_struct *tty)
1805 {
1806         struct mxser_struct *info = tty->driver_data;
1807         unsigned long flags;
1808
1809         spin_lock_irqsave(&info->slock, flags);
1810         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1811                 info->IER |= UART_IER_THRI;
1812                 outb(info->IER, info->base + UART_IER);
1813         }
1814         spin_unlock_irqrestore(&info->slock, flags);
1815 }
1816
1817 /*
1818  * mxser_wait_until_sent() --- wait until the transmitter is empty
1819  */
1820 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1821 {
1822         struct mxser_struct *info = tty->driver_data;
1823         unsigned long orig_jiffies, char_time;
1824         int lsr;
1825
1826         if (info->type == PORT_UNKNOWN)
1827                 return;
1828
1829         if (info->xmit_fifo_size == 0)
1830                 return;         /* Just in case.... */
1831
1832         orig_jiffies = jiffies;
1833         /*
1834          * Set the check interval to be 1/5 of the estimated time to
1835          * send a single character, and make it at least 1.  The check
1836          * interval should also be less than the timeout.
1837          *
1838          * Note: we have to use pretty tight timings here to satisfy
1839          * the NIST-PCTS.
1840          */
1841         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1842         char_time = char_time / 5;
1843         if (char_time == 0)
1844                 char_time = 1;
1845         if (timeout && timeout < char_time)
1846                 char_time = timeout;
1847         /*
1848          * If the transmitter hasn't cleared in twice the approximate
1849          * amount of time to send the entire FIFO, it probably won't
1850          * ever clear.  This assumes the UART isn't doing flow
1851          * control, which is currently the case.  Hence, if it ever
1852          * takes longer than info->timeout, this is probably due to a
1853          * UART bug of some kind.  So, we clamp the timeout parameter at
1854          * 2*info->timeout.
1855          */
1856         if (!timeout || timeout > 2 * info->timeout)
1857                 timeout = 2 * info->timeout;
1858 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1859         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1860                 timeout, char_time);
1861         printk("jiff=%lu...", jiffies);
1862 #endif
1863         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1864 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1865                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1866 #endif
1867                 schedule_timeout_interruptible(char_time);
1868                 if (signal_pending(current))
1869                         break;
1870                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1871                         break;
1872         }
1873         set_current_state(TASK_RUNNING);
1874
1875 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1876         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1877 #endif
1878 }
1879
1880
1881 /*
1882  * This routine is called by tty_hangup() when a hangup is signaled.
1883  */
1884 void mxser_hangup(struct tty_struct *tty)
1885 {
1886         struct mxser_struct *info = tty->driver_data;
1887
1888         mxser_flush_buffer(tty);
1889         mxser_shutdown(info);
1890         info->event = 0;
1891         info->count = 0;
1892         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1893         info->tty = NULL;
1894         wake_up_interruptible(&info->open_wait);
1895 }
1896
1897
1898 /* added by James 03-12-2004. */
1899 /*
1900  * mxser_rs_break() --- routine which turns the break handling on or off
1901  */
1902 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1903 {
1904         struct mxser_struct *info = tty->driver_data;
1905         unsigned long flags;
1906
1907         spin_lock_irqsave(&info->slock, flags);
1908         if (break_state == -1)
1909                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1910                         info->base + UART_LCR);
1911         else
1912                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1913                         info->base + UART_LCR);
1914         spin_unlock_irqrestore(&info->slock, flags);
1915 }
1916
1917 /* (above) added by James. */
1918
1919
1920 /*
1921  * This is the serial driver's generic interrupt routine
1922  */
1923 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1924 {
1925         int status, iir, i;
1926         struct mxser_struct *info;
1927         struct mxser_struct *port;
1928         int max, irqbits, bits, msr;
1929         int pass_counter = 0;
1930         int handled = IRQ_NONE;
1931
1932         port = NULL;
1933         /* spin_lock(&gm_lock); */
1934
1935         for (i = 0; i < MXSER_BOARDS; i++) {
1936                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1937                         port = dev_id;
1938                         break;
1939                 }
1940         }
1941
1942         if (i == MXSER_BOARDS)
1943                 goto irq_stop;
1944         if (port == 0)
1945                 goto irq_stop;
1946         max = mxser_numports[mxsercfg[i].board_type - 1];
1947         while (1) {
1948                 irqbits = inb(port->vector) & port->vectormask;
1949                 if (irqbits == port->vectormask)
1950                         break;
1951
1952                 handled = IRQ_HANDLED;
1953                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1954                         if (irqbits == port->vectormask)
1955                                 break;
1956                         if (bits & irqbits)
1957                                 continue;
1958                         info = port + i;
1959
1960                         /* following add by Victor Yu. 09-13-2002 */
1961                         iir = inb(info->base + UART_IIR);
1962                         if (iir & UART_IIR_NO_INT)
1963                                 continue;
1964                         iir &= MOXA_MUST_IIR_MASK;
1965                         if (!info->tty) {
1966                                 status = inb(info->base + UART_LSR);
1967                                 outb(0x27, info->base + UART_FCR);
1968                                 inb(info->base + UART_MSR);
1969                                 continue;
1970                         }
1971                         /* above add by Victor Yu. 09-13-2002 */
1972                         /*
1973                            if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1974                            info->IER |= MOXA_MUST_RECV_ISR;
1975                            outb(info->IER, info->base + UART_IER);
1976                            }
1977                          */
1978
1979
1980                         /* mask by Victor Yu. 09-13-2002
1981                            if ( !info->tty ||
1982                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1983                            continue;
1984                          */
1985                         /* mask by Victor Yu. 09-02-2002
1986                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1987                          */
1988
1989                         /* following add by Victor Yu. 09-02-2002 */
1990                         status = inb(info->base + UART_LSR);
1991
1992                         if (status & UART_LSR_PE)
1993                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1994                         if (status & UART_LSR_FE)
1995                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1996                         if (status & UART_LSR_OE)
1997                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1998                         if (status & UART_LSR_BI)
1999                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
2000
2001                         if (info->IsMoxaMustChipFlag) {
2002                                 /*
2003                                    if ( (status & 0x02) && !(status & 0x01) ) {
2004                                    outb(info->base+UART_FCR,  0x23);
2005                                    continue;
2006                                    }
2007                                  */
2008                                 if (iir == MOXA_MUST_IIR_GDA ||
2009                                                 iir == MOXA_MUST_IIR_RDA ||
2010                                                 iir == MOXA_MUST_IIR_RTO ||
2011                                                 iir == MOXA_MUST_IIR_LSR)
2012                                         mxser_receive_chars(info, &status);
2013
2014                         } else {
2015                                 /* above add by Victor Yu. 09-02-2002 */
2016
2017                                 status &= info->read_status_mask;
2018                                 if (status & UART_LSR_DR)
2019                                         mxser_receive_chars(info, &status);
2020                         }
2021                         msr = inb(info->base + UART_MSR);
2022                         if (msr & UART_MSR_ANY_DELTA) {
2023                                 mxser_check_modem_status(info, msr);
2024                         }
2025                         /* following add by Victor Yu. 09-13-2002 */
2026                         if (info->IsMoxaMustChipFlag) {
2027                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2028                                         mxser_transmit_chars(info);
2029                                 }
2030                         } else {
2031                                 /* above add by Victor Yu. 09-13-2002 */
2032
2033                                 if (status & UART_LSR_THRE) {
2034 /* 8-2-99 by William
2035                             if ( info->x_char || (info->xmit_cnt > 0) )
2036 */
2037                                         mxser_transmit_chars(info);
2038                                 }
2039                         }
2040                 }
2041                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2042                         break;  /* Prevent infinite loops */
2043                 }
2044         }
2045
2046       irq_stop:
2047         /* spin_unlock(&gm_lock); */
2048         return handled;
2049 }
2050
2051 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2052 {
2053         struct tty_struct *tty = info->tty;
2054         unsigned char ch, gdl;
2055         int ignored = 0;
2056         int cnt = 0;
2057         int recv_room;
2058         int max = 256;
2059         unsigned long flags;
2060
2061         spin_lock_irqsave(&info->slock, flags);
2062
2063         recv_room = tty->receive_room;
2064         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2065                 /* mxser_throttle(tty); */
2066                 mxser_stoprx(tty);
2067                 /* return; */
2068         }
2069
2070         /* following add by Victor Yu. 09-02-2002 */
2071         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2072
2073                 if (*status & UART_LSR_SPECIAL) {
2074                         goto intr_old;
2075                 }
2076                 /* following add by Victor Yu. 02-11-2004 */
2077                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2078                                 (*status & MOXA_MUST_LSR_RERR))
2079                         goto intr_old;
2080                 /* above add by Victor Yu. 02-14-2004 */
2081                 if (*status & MOXA_MUST_LSR_RERR)
2082                         goto intr_old;
2083
2084                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2085
2086                 /* add by Victor Yu. 02-11-2004 */
2087                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2088                         gdl &= MOXA_MUST_GDL_MASK;
2089                 if (gdl >= recv_room) {
2090                         if (!info->ldisc_stop_rx) {
2091                                 /* mxser_throttle(tty); */
2092                                 mxser_stoprx(tty);
2093                         }
2094                         /* return; */
2095                 }
2096                 while (gdl--) {
2097                         ch = inb(info->base + UART_RX);
2098                         tty_insert_flip_char(tty, ch, 0);
2099                         cnt++;
2100                         /*
2101                            if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2102                            mxser_stoprx(tty);
2103                            info->stop_rx = 1;
2104                            break;
2105                            } */
2106                 }
2107                 goto end_intr;
2108         }
2109  intr_old:
2110         /* above add by Victor Yu. 09-02-2002 */
2111
2112         do {
2113                 if (max-- < 0)
2114                         break;
2115                 /*
2116                    if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2117                    mxser_stoprx(tty);
2118                    info->stop_rx=1;
2119                    break;
2120                    }
2121                  */
2122
2123                 ch = inb(info->base + UART_RX);
2124                 /* following add by Victor Yu. 09-02-2002 */
2125                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2126                         outb(0x23, info->base + UART_FCR);
2127                 *status &= info->read_status_mask;
2128                 /* above add by Victor Yu. 09-02-2002 */
2129                 if (*status & info->ignore_status_mask) {
2130                         if (++ignored > 100)
2131                                 break;
2132                 } else {
2133                         char flag = 0;
2134                         if (*status & UART_LSR_SPECIAL) {
2135                                 if (*status & UART_LSR_BI) {
2136                                         flag = TTY_BREAK;
2137 /* added by casper 1/11/2000 */
2138                                         info->icount.brk++;
2139 /* */
2140                                         if (info->flags & ASYNC_SAK)
2141                                                 do_SAK(tty);
2142                                 } else if (*status & UART_LSR_PE) {
2143                                         flag = TTY_PARITY;
2144 /* added by casper 1/11/2000 */
2145                                         info->icount.parity++;
2146 /* */
2147                                 } else if (*status & UART_LSR_FE) {
2148                                         flag = TTY_FRAME;
2149 /* added by casper 1/11/2000 */
2150                                         info->icount.frame++;
2151 /* */
2152                                 } else if (*status & UART_LSR_OE) {
2153                                         flag = TTY_OVERRUN;
2154 /* added by casper 1/11/2000 */
2155                                         info->icount.overrun++;
2156 /* */
2157                                 }
2158                         }
2159                         tty_insert_flip_char(tty, ch, flag);
2160                         cnt++;
2161                         if (cnt >= recv_room) {
2162                                 if (!info->ldisc_stop_rx) {
2163                                         /* mxser_throttle(tty); */
2164                                         mxser_stoprx(tty);
2165                                 }
2166                                 break;
2167                         }
2168
2169                 }
2170
2171                 /* following add by Victor Yu. 09-02-2002 */
2172                 if (info->IsMoxaMustChipFlag)
2173                         break;
2174                 /* above add by Victor Yu. 09-02-2002 */
2175
2176                 /* mask by Victor Yu. 09-02-2002
2177                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2178                  */
2179                 /* following add by Victor Yu. 09-02-2002 */
2180                 *status = inb(info->base + UART_LSR);
2181                 /* above add by Victor Yu. 09-02-2002 */
2182         } while (*status & UART_LSR_DR);
2183
2184 end_intr:               /* add by Victor Yu. 09-02-2002 */
2185         mxvar_log.rxcnt[info->port] += cnt;
2186         info->mon_data.rxcnt += cnt;
2187         info->mon_data.up_rxcnt += cnt;
2188         spin_unlock_irqrestore(&info->slock, flags);
2189
2190         tty_flip_buffer_push(tty);
2191 }
2192
2193 static void mxser_transmit_chars(struct mxser_struct *info)
2194 {
2195         int count, cnt;
2196         unsigned long flags;
2197
2198         spin_lock_irqsave(&info->slock, flags);
2199
2200         if (info->x_char) {
2201                 outb(info->x_char, info->base + UART_TX);
2202                 info->x_char = 0;
2203                 mxvar_log.txcnt[info->port]++;
2204                 info->mon_data.txcnt++;
2205                 info->mon_data.up_txcnt++;
2206
2207 /* added by casper 1/11/2000 */
2208                 info->icount.tx++;
2209 /* */
2210                 spin_unlock_irqrestore(&info->slock, flags);
2211                 return;
2212         }
2213
2214         if (info->xmit_buf == 0) {
2215                 spin_unlock_irqrestore(&info->slock, flags);
2216                 return;
2217         }
2218
2219         if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2220                         (info->tty->hw_stopped &&
2221                         (info->type != PORT_16550A) &&
2222                         (!info->IsMoxaMustChipFlag))) {
2223                 info->IER &= ~UART_IER_THRI;
2224                 outb(info->IER, info->base + UART_IER);
2225                 spin_unlock_irqrestore(&info->slock, flags);
2226                 return;
2227         }
2228
2229         cnt = info->xmit_cnt;
2230         count = info->xmit_fifo_size;
2231         do {
2232                 outb(info->xmit_buf[info->xmit_tail++],
2233                         info->base + UART_TX);
2234                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2235                 if (--info->xmit_cnt <= 0)
2236                         break;
2237         } while (--count > 0);
2238         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2239
2240 /* added by James 03-12-2004. */
2241         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2242         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2243 /* (above) added by James. */
2244
2245 /* added by casper 1/11/2000 */
2246         info->icount.tx += (cnt - info->xmit_cnt);
2247 /* */
2248
2249         if (info->xmit_cnt < WAKEUP_CHARS) {
2250                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2251                 schedule_work(&info->tqueue);
2252         }
2253         if (info->xmit_cnt <= 0) {
2254                 info->IER &= ~UART_IER_THRI;
2255                 outb(info->IER, info->base + UART_IER);
2256         }
2257         spin_unlock_irqrestore(&info->slock, flags);
2258 }
2259
2260 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2261 {
2262         /* update input line counters */
2263         if (status & UART_MSR_TERI)
2264                 info->icount.rng++;
2265         if (status & UART_MSR_DDSR)
2266                 info->icount.dsr++;
2267         if (status & UART_MSR_DDCD)
2268                 info->icount.dcd++;
2269         if (status & UART_MSR_DCTS)
2270                 info->icount.cts++;
2271         info->mon_data.modem_status = status;
2272         wake_up_interruptible(&info->delta_msr_wait);
2273
2274         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2275                 if (status & UART_MSR_DCD)
2276                         wake_up_interruptible(&info->open_wait);
2277                 schedule_work(&info->tqueue);
2278         }
2279
2280         if (info->flags & ASYNC_CTS_FLOW) {
2281                 if (info->tty->hw_stopped) {
2282                         if (status & UART_MSR_CTS) {
2283                                 info->tty->hw_stopped = 0;
2284
2285                                 if ((info->type != PORT_16550A) &&
2286                                                 (!info->IsMoxaMustChipFlag)) {
2287                                         info->IER |= UART_IER_THRI;
2288                                         outb(info->IER, info->base + UART_IER);
2289                                 }
2290                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2291                                 schedule_work(&info->tqueue);                   }
2292                 } else {
2293                         if (!(status & UART_MSR_CTS)) {
2294                                 info->tty->hw_stopped = 1;
2295                                 if ((info->type != PORT_16550A) &&
2296                                                 (!info->IsMoxaMustChipFlag)) {
2297                                         info->IER &= ~UART_IER_THRI;
2298                                         outb(info->IER, info->base + UART_IER);
2299                                 }
2300                         }
2301                 }
2302         }
2303 }
2304
2305 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2306 {
2307         DECLARE_WAITQUEUE(wait, current);
2308         int retval;
2309         int do_clocal = 0;
2310         unsigned long flags;
2311
2312         /*
2313          * If non-blocking mode is set, or the port is not enabled,
2314          * then make the check up front and then exit.
2315          */
2316         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2317                 info->flags |= ASYNC_NORMAL_ACTIVE;
2318                 return 0;
2319         }
2320
2321         if (tty->termios->c_cflag & CLOCAL)
2322                 do_clocal = 1;
2323
2324         /*
2325          * Block waiting for the carrier detect and the line to become
2326          * free (i.e., not in use by the callout).  While we are in
2327          * this loop, info->count is dropped by one, so that
2328          * mxser_close() knows when to free things.  We restore it upon
2329          * exit, either normal or abnormal.
2330          */
2331         retval = 0;
2332         add_wait_queue(&info->open_wait, &wait);
2333
2334         spin_lock_irqsave(&info->slock, flags);
2335         if (!tty_hung_up_p(filp))
2336                 info->count--;
2337         spin_unlock_irqrestore(&info->slock, flags);
2338         info->blocked_open++;
2339         while (1) {
2340                 spin_lock_irqsave(&info->slock, flags);
2341                 outb(inb(info->base + UART_MCR) |
2342                         UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2343                 spin_unlock_irqrestore(&info->slock, flags);
2344                 set_current_state(TASK_INTERRUPTIBLE);
2345                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2346                         if (info->flags & ASYNC_HUP_NOTIFY)
2347                                 retval = -EAGAIN;
2348                         else
2349                                 retval = -ERESTARTSYS;
2350                         break;
2351                 }
2352                 if (!(info->flags & ASYNC_CLOSING) &&
2353                                 (do_clocal ||
2354                                 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2355                         break;
2356                 if (signal_pending(current)) {
2357                         retval = -ERESTARTSYS;
2358                         break;
2359                 }
2360                 schedule();
2361         }
2362         set_current_state(TASK_RUNNING);
2363         remove_wait_queue(&info->open_wait, &wait);
2364         if (!tty_hung_up_p(filp))
2365                 info->count++;
2366         info->blocked_open--;
2367         if (retval)
2368                 return retval;
2369         info->flags |= ASYNC_NORMAL_ACTIVE;
2370         return 0;
2371 }
2372
2373 static int mxser_startup(struct mxser_struct *info)
2374 {
2375         unsigned long page;
2376         unsigned long flags;
2377
2378         page = __get_free_page(GFP_KERNEL);
2379         if (!page)
2380                 return -ENOMEM;
2381
2382         spin_lock_irqsave(&info->slock, flags);
2383
2384         if (info->flags & ASYNC_INITIALIZED) {
2385                 free_page(page);
2386                 spin_unlock_irqrestore(&info->slock, flags);
2387                 return 0;
2388         }
2389
2390         if (!info->base || !info->type) {
2391                 if (info->tty)
2392                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2393                 free_page(page);
2394                 spin_unlock_irqrestore(&info->slock, flags);
2395                 return 0;
2396         }
2397         if (info->xmit_buf)
2398                 free_page(page);
2399         else
2400                 info->xmit_buf = (unsigned char *) page;
2401
2402         /*
2403          * Clear the FIFO buffers and disable them
2404          * (they will be reenabled in mxser_change_speed())
2405          */
2406         if (info->IsMoxaMustChipFlag)
2407                 outb((UART_FCR_CLEAR_RCVR |
2408                         UART_FCR_CLEAR_XMIT |
2409                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2410         else
2411                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2412                         info->base + UART_FCR);
2413
2414         /*
2415          * At this point there's no way the LSR could still be 0xFF;
2416          * if it is, then bail out, because there's likely no UART
2417          * here.
2418          */
2419         if (inb(info->base + UART_LSR) == 0xff) {
2420                 spin_unlock_irqrestore(&info->slock, flags);
2421                 if (capable(CAP_SYS_ADMIN)) {
2422                         if (info->tty)
2423                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2424                         return 0;
2425                 } else
2426                         return -ENODEV;
2427         }
2428
2429         /*
2430          * Clear the interrupt registers.
2431          */
2432         (void) inb(info->base + UART_LSR);
2433         (void) inb(info->base + UART_RX);
2434         (void) inb(info->base + UART_IIR);
2435         (void) inb(info->base + UART_MSR);
2436
2437         /*
2438          * Now, initialize the UART
2439          */
2440         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2441         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2442         outb(info->MCR, info->base + UART_MCR);
2443
2444         /*
2445          * Finally, enable interrupts
2446          */
2447         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2448         /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2449
2450         /* following add by Victor Yu. 08-30-2002 */
2451         if (info->IsMoxaMustChipFlag)
2452                 info->IER |= MOXA_MUST_IER_EGDAI;
2453         /* above add by Victor Yu. 08-30-2002 */
2454         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2455
2456         /*
2457          * And clear the interrupt registers again for luck.
2458          */
2459         (void) inb(info->base + UART_LSR);
2460         (void) inb(info->base + UART_RX);
2461         (void) inb(info->base + UART_IIR);
2462         (void) inb(info->base + UART_MSR);
2463
2464         if (info->tty)
2465                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2466         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2467
2468         /*
2469          * and set the speed of the serial port
2470          */
2471         spin_unlock_irqrestore(&info->slock, flags);
2472         mxser_change_speed(info, NULL);
2473
2474         info->flags |= ASYNC_INITIALIZED;
2475         return 0;
2476 }
2477
2478 /*
2479  * This routine will shutdown a serial port; interrupts maybe disabled, and
2480  * DTR is dropped if the hangup on close termio flag is on.
2481  */
2482 static void mxser_shutdown(struct mxser_struct *info)
2483 {
2484         unsigned long flags;
2485
2486         if (!(info->flags & ASYNC_INITIALIZED))
2487                 return;
2488
2489         spin_lock_irqsave(&info->slock, flags);
2490
2491         /*
2492          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2493          * here so the queue might never be waken up
2494          */
2495         wake_up_interruptible(&info->delta_msr_wait);
2496
2497         /*
2498          * Free the IRQ, if necessary
2499          */
2500         if (info->xmit_buf) {
2501                 free_page((unsigned long) info->xmit_buf);
2502                 info->xmit_buf = NULL;
2503         }
2504
2505         info->IER = 0;
2506         outb(0x00, info->base + UART_IER);
2507
2508         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2509                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2510         outb(info->MCR, info->base + UART_MCR);
2511
2512         /* clear Rx/Tx FIFO's */
2513         /* following add by Victor Yu. 08-30-2002 */
2514         if (info->IsMoxaMustChipFlag)
2515                 outb((UART_FCR_CLEAR_RCVR |
2516                         UART_FCR_CLEAR_XMIT |
2517                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2518         else
2519                 /* above add by Victor Yu. 08-30-2002 */
2520                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2521                         info->base + UART_FCR);
2522
2523         /* read data port to reset things */
2524         (void) inb(info->base + UART_RX);
2525
2526         if (info->tty)
2527                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2528
2529         info->flags &= ~ASYNC_INITIALIZED;
2530
2531         /* following add by Victor Yu. 09-23-2002 */
2532         if (info->IsMoxaMustChipFlag)
2533                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2534         /* above add by Victor Yu. 09-23-2002 */
2535
2536         spin_unlock_irqrestore(&info->slock, flags);
2537 }
2538
2539 /*
2540  * This routine is called to set the UART divisor registers to match
2541  * the specified baud rate for a serial port.
2542  */
2543 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2544 {
2545         unsigned cflag, cval, fcr;
2546         int ret = 0;
2547         unsigned char status;
2548         long baud;
2549         unsigned long flags;
2550
2551         if (!info->tty || !info->tty->termios)
2552                 return ret;
2553         cflag = info->tty->termios->c_cflag;
2554         if (!(info->base))
2555                 return ret;
2556
2557 #ifndef B921600
2558 #define B921600 (B460800 +1)
2559 #endif
2560         if (mxser_set_baud_method[info->port] == 0) {
2561                 baud = tty_get_baud_rate(info->tty);
2562                 mxser_set_baud(info, baud);
2563         }
2564
2565         /* byte size and parity */
2566         switch (cflag & CSIZE) {
2567         case CS5:
2568                 cval = 0x00;
2569                 break;
2570         case CS6:
2571                 cval = 0x01;
2572                 break;
2573         case CS7:
2574                 cval = 0x02;
2575                 break;
2576         case CS8:
2577                 cval = 0x03;
2578                 break;
2579         default:
2580                 cval = 0x00;
2581                 break;          /* too keep GCC shut... */
2582         }
2583         if (cflag & CSTOPB)
2584                 cval |= 0x04;
2585         if (cflag & PARENB)
2586                 cval |= UART_LCR_PARITY;
2587         if (!(cflag & PARODD))
2588                 cval |= UART_LCR_EPAR;
2589         if (cflag & CMSPAR)
2590                 cval |= UART_LCR_SPAR;
2591
2592         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2593                 if (info->IsMoxaMustChipFlag) {
2594                         fcr = UART_FCR_ENABLE_FIFO;
2595                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2596                         SET_MOXA_MUST_FIFO_VALUE(info);
2597                 } else
2598                         fcr = 0;
2599         } else {
2600                 fcr = UART_FCR_ENABLE_FIFO;
2601                 /* following add by Victor Yu. 08-30-2002 */
2602                 if (info->IsMoxaMustChipFlag) {
2603                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2604                         SET_MOXA_MUST_FIFO_VALUE(info);
2605                 } else {
2606                         /* above add by Victor Yu. 08-30-2002 */
2607                         switch (info->rx_trigger) {
2608                         case 1:
2609                                 fcr |= UART_FCR_TRIGGER_1;
2610                                 break;
2611                         case 4:
2612                                 fcr |= UART_FCR_TRIGGER_4;
2613                                 break;
2614                         case 8:
2615                                 fcr |= UART_FCR_TRIGGER_8;
2616                                 break;
2617                         default:
2618                                 fcr |= UART_FCR_TRIGGER_14;
2619                                 break;
2620                         }
2621                 }
2622         }
2623
2624         /* CTS flow control flag and modem status interrupts */
2625         info->IER &= ~UART_IER_MSI;
2626         info->MCR &= ~UART_MCR_AFE;
2627         if (cflag & CRTSCTS) {
2628                 info->flags |= ASYNC_CTS_FLOW;
2629                 info->IER |= UART_IER_MSI;
2630                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2631                         info->MCR |= UART_MCR_AFE;
2632                         /* status = mxser_get_msr(info->base, 0, info->port); */
2633 /*
2634         save_flags(flags);
2635         cli();
2636         status = inb(baseaddr + UART_MSR);
2637         restore_flags(flags);
2638 */
2639                         /* mxser_check_modem_status(info, status); */
2640                 } else {
2641                         /* status = mxser_get_msr(info->base, 0, info->port); */
2642                         /* MX_LOCK(&info->slock); */
2643                         status = inb(info->base + UART_MSR);
2644                         /* MX_UNLOCK(&info->slock); */
2645                         if (info->tty->hw_stopped) {
2646                                 if (status & UART_MSR_CTS) {
2647                                         info->tty->hw_stopped = 0;
2648                                         if ((info->type != PORT_16550A) &&
2649                                                         (!info->IsMoxaMustChipFlag)) {
2650                                                 info->IER |= UART_IER_THRI;
2651                                                 outb(info->IER, info->base + UART_IER);
2652                                         }
2653                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2654                                         schedule_work(&info->tqueue);                           }
2655                         } else {
2656                                 if (!(status & UART_MSR_CTS)) {
2657                                         info->tty->hw_stopped = 1;
2658                                         if ((info->type != PORT_16550A) &&
2659                                                         (!info->IsMoxaMustChipFlag)) {
2660                                                 info->IER &= ~UART_IER_THRI;
2661                                                 outb(info->IER, info->base + UART_IER);
2662                                         }
2663                                 }
2664                         }
2665                 }
2666         } else {
2667                 info->flags &= ~ASYNC_CTS_FLOW;
2668         }
2669         outb(info->MCR, info->base + UART_MCR);
2670         if (cflag & CLOCAL) {
2671                 info->flags &= ~ASYNC_CHECK_CD;
2672         } else {
2673                 info->flags |= ASYNC_CHECK_CD;
2674                 info->IER |= UART_IER_MSI;
2675         }
2676         outb(info->IER, info->base + UART_IER);
2677
2678         /*
2679          * Set up parity check flag
2680          */
2681         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2682         if (I_INPCK(info->tty))
2683                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2684         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2685                 info->read_status_mask |= UART_LSR_BI;
2686
2687         info->ignore_status_mask = 0;
2688
2689         if (I_IGNBRK(info->tty)) {
2690                 info->ignore_status_mask |= UART_LSR_BI;
2691                 info->read_status_mask |= UART_LSR_BI;
2692                 /*
2693                  * If we're ignore parity and break indicators, ignore
2694                  * overruns too.  (For real raw support).
2695                  */
2696                 if (I_IGNPAR(info->tty)) {
2697                         info->ignore_status_mask |=
2698                                                 UART_LSR_OE |
2699                                                 UART_LSR_PE |
2700                                                 UART_LSR_FE;
2701                         info->read_status_mask |=
2702                                                 UART_LSR_OE |
2703                                                 UART_LSR_PE |
2704                                                 UART_LSR_FE;
2705                 }
2706         }
2707         /* following add by Victor Yu. 09-02-2002 */
2708         if (info->IsMoxaMustChipFlag) {
2709                 spin_lock_irqsave(&info->slock, flags);
2710                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2711                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2712                 if (I_IXON(info->tty)) {
2713                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2714                 } else {
2715                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2716                 }
2717                 if (I_IXOFF(info->tty)) {
2718                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2719                 } else {
2720                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2721                 }
2722                 /*
2723                    if ( I_IXANY(info->tty) ) {
2724                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2725                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2726                    } else {
2727                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2728                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2729                    }
2730                  */
2731                 spin_unlock_irqrestore(&info->slock, flags);
2732         }
2733         /* above add by Victor Yu. 09-02-2002 */
2734
2735
2736         outb(fcr, info->base + UART_FCR);       /* set fcr */
2737         outb(cval, info->base + UART_LCR);
2738
2739         return ret;
2740 }
2741
2742
2743 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2744 {
2745         int quot = 0;
2746         unsigned char cval;
2747         int ret = 0;
2748         unsigned long flags;
2749
2750         if (!info->tty || !info->tty->termios)
2751                 return ret;
2752
2753         if (!(info->base))
2754                 return ret;
2755
2756         if (newspd > info->MaxCanSetBaudRate)
2757                 return 0;
2758
2759         info->realbaud = newspd;
2760         if (newspd == 134) {
2761                 quot = (2 * info->baud_base / 269);
2762         } else if (newspd) {
2763                 quot = info->baud_base / newspd;
2764                 if (quot == 0)
2765                         quot = 1;
2766         } else {
2767                 quot = 0;
2768         }
2769
2770         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2771         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2772
2773         if (quot) {
2774                 spin_lock_irqsave(&info->slock, flags);
2775                 info->MCR |= UART_MCR_DTR;
2776                 outb(info->MCR, info->base + UART_MCR);
2777                 spin_unlock_irqrestore(&info->slock, flags);
2778         } else {
2779                 spin_lock_irqsave(&info->slock, flags);
2780                 info->MCR &= ~UART_MCR_DTR;
2781                 outb(info->MCR, info->base + UART_MCR);
2782                 spin_unlock_irqrestore(&info->slock, flags);
2783                 return ret;
2784         }
2785
2786         cval = inb(info->base + UART_LCR);
2787
2788         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2789
2790         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2791         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2792         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2793
2794
2795         return ret;
2796 }
2797
2798 /*
2799  * ------------------------------------------------------------
2800  * friends of mxser_ioctl()
2801  * ------------------------------------------------------------
2802  */
2803 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2804 {
2805         struct serial_struct tmp;
2806
2807         if (!retinfo)
2808                 return -EFAULT;
2809         memset(&tmp, 0, sizeof(tmp));
2810         tmp.type = info->type;
2811         tmp.line = info->port;
2812         tmp.port = info->base;
2813         tmp.irq = info->irq;
2814         tmp.flags = info->flags;
2815         tmp.baud_base = info->baud_base;
2816         tmp.close_delay = info->close_delay;
2817         tmp.closing_wait = info->closing_wait;
2818         tmp.custom_divisor = info->custom_divisor;
2819         tmp.hub6 = 0;
2820         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2821                 return -EFAULT;
2822         return 0;
2823 }
2824
2825 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2826 {
2827         struct serial_struct new_serial;
2828         unsigned int flags;
2829         int retval = 0;
2830
2831         if (!new_info || !info->base)
2832                 return -EFAULT;
2833         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2834                 return -EFAULT;
2835
2836         if ((new_serial.irq != info->irq) ||
2837                         (new_serial.port != info->base) ||
2838                         (new_serial.custom_divisor != info->custom_divisor) ||
2839                         (new_serial.baud_base != info->baud_base))
2840                 return -EPERM;
2841
2842         flags = info->flags & ASYNC_SPD_MASK;
2843
2844         if (!capable(CAP_SYS_ADMIN)) {
2845                 if ((new_serial.baud_base != info->baud_base) ||
2846                                 (new_serial.close_delay != info->close_delay) ||
2847                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2848                         return -EPERM;
2849                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2850                                 (new_serial.flags & ASYNC_USR_MASK));
2851         } else {
2852                 /*
2853                  * OK, past this point, all the error checking has been done.
2854                  * At this point, we start making changes.....
2855                  */
2856                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2857                                 (new_serial.flags & ASYNC_FLAGS));
2858                 info->close_delay = new_serial.close_delay * HZ / 100;
2859                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2860                 info->tty->low_latency =
2861                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2862                 info->tty->low_latency = 0;     /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2863         }
2864
2865         /* added by casper, 3/17/2000, for mouse */
2866         info->type = new_serial.type;
2867
2868         process_txrx_fifo(info);
2869
2870         if (info->flags & ASYNC_INITIALIZED) {
2871                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2872                         mxser_change_speed(info, NULL);
2873                 }
2874         } else {
2875                 retval = mxser_startup(info);
2876         }
2877         return retval;
2878 }
2879
2880 /*
2881  * mxser_get_lsr_info - get line status register info
2882  *
2883  * Purpose: Let user call ioctl() to get info when the UART physically
2884  *          is emptied.  On bus types like RS485, the transmitter must
2885  *          release the bus after transmitting. This must be done when
2886  *          the transmit shift register is empty, not be done when the
2887  *          transmit holding register is empty.  This functionality
2888  *          allows an RS485 driver to be written in user space.
2889  */
2890 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2891 {
2892         unsigned char status;
2893         unsigned int result;
2894         unsigned long flags;
2895
2896         spin_lock_irqsave(&info->slock, flags);
2897         status = inb(info->base + UART_LSR);
2898         spin_unlock_irqrestore(&info->slock, flags);
2899         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2900         return put_user(result, value);
2901 }
2902
2903 /*
2904  * This routine sends a break character out the serial port.
2905  */
2906 static void mxser_send_break(struct mxser_struct *info, int duration)
2907 {
2908         unsigned long flags;
2909
2910         if (!info->base)
2911                 return;
2912         set_current_state(TASK_INTERRUPTIBLE);
2913         spin_lock_irqsave(&info->slock, flags);
2914         outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2915                 info->base + UART_LCR);
2916         spin_unlock_irqrestore(&info->slock, flags);
2917         schedule_timeout(duration);
2918         spin_lock_irqsave(&info->slock, flags);
2919         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2920                 info->base + UART_LCR);
2921         spin_unlock_irqrestore(&info->slock, flags);
2922 }
2923
2924 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2925 {
2926         struct mxser_struct *info = tty->driver_data;
2927         unsigned char control, status;
2928         unsigned long flags;
2929
2930
2931         if (tty->index == MXSER_PORTS)
2932                 return -ENOIOCTLCMD;
2933         if (tty->flags & (1 << TTY_IO_ERROR))
2934                 return -EIO;
2935
2936         control = info->MCR;
2937
2938         spin_lock_irqsave(&info->slock, flags);
2939         status = inb(info->base + UART_MSR);
2940         if (status & UART_MSR_ANY_DELTA)
2941                 mxser_check_modem_status(info, status);
2942         spin_unlock_irqrestore(&info->slock, flags);
2943         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2944                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2945                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2946                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2947                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2948                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2949 }
2950
2951 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2952 {
2953         struct mxser_struct *info = tty->driver_data;
2954         unsigned long flags;
2955
2956
2957         if (tty->index == MXSER_PORTS)
2958                 return -ENOIOCTLCMD;
2959         if (tty->flags & (1 << TTY_IO_ERROR))
2960                 return -EIO;
2961
2962         spin_lock_irqsave(&info->slock, flags);
2963
2964         if (set & TIOCM_RTS)
2965                 info->MCR |= UART_MCR_RTS;
2966         if (set & TIOCM_DTR)
2967                 info->MCR |= UART_MCR_DTR;
2968
2969         if (clear & TIOCM_RTS)
2970                 info->MCR &= ~UART_MCR_RTS;
2971         if (clear & TIOCM_DTR)
2972                 info->MCR &= ~UART_MCR_DTR;
2973
2974         outb(info->MCR, info->base + UART_MCR);
2975         spin_unlock_irqrestore(&info->slock, flags);
2976         return 0;
2977 }
2978
2979
2980 static int mxser_read_register(int, unsigned short *);
2981 static int mxser_program_mode(int);
2982 static void mxser_normal_mode(int);
2983
2984 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2985 {
2986         int id, i, bits;
2987         unsigned short regs[16], irq;
2988         unsigned char scratch, scratch2;
2989
2990         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2991
2992         id = mxser_read_register(cap, regs);
2993         if (id == C168_ASIC_ID) {
2994                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2995                 hwconf->ports = 8;
2996         } else if (id == C104_ASIC_ID) {
2997                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2998                 hwconf->ports = 4;
2999         } else if (id == C102_ASIC_ID) {
3000                 hwconf->board_type = MXSER_BOARD_C102_ISA;
3001                 hwconf->ports = 2;
3002         } else if (id == CI132_ASIC_ID) {
3003                 hwconf->board_type = MXSER_BOARD_CI132;
3004                 hwconf->ports = 2;
3005         } else if (id == CI134_ASIC_ID) {
3006                 hwconf->board_type = MXSER_BOARD_CI134;
3007                 hwconf->ports = 4;
3008         } else if (id == CI104J_ASIC_ID) {
3009                 hwconf->board_type = MXSER_BOARD_CI104J;
3010                 hwconf->ports = 4;
3011         } else
3012                 return 0;
3013
3014         irq = 0;
3015         if (hwconf->ports == 2) {
3016                 irq = regs[9] & 0xF000;
3017                 irq = irq | (irq >> 4);
3018                 if (irq != (regs[9] & 0xFF00))
3019                         return MXSER_ERR_IRQ_CONFLIT;
3020         } else if (hwconf->ports == 4) {
3021                 irq = regs[9] & 0xF000;
3022                 irq = irq | (irq >> 4);
3023                 irq = irq | (irq >> 8);
3024                 if (irq != regs[9])
3025                         return MXSER_ERR_IRQ_CONFLIT;
3026         } else if (hwconf->ports == 8) {
3027                 irq = regs[9] & 0xF000;
3028                 irq = irq | (irq >> 4);
3029                 irq = irq | (irq >> 8);
3030                 if ((irq != regs[9]) || (irq != regs[10]))
3031                         return MXSER_ERR_IRQ_CONFLIT;
3032         }
3033
3034         if (!irq)
3035                 return MXSER_ERR_IRQ;
3036         hwconf->irq = ((int)(irq & 0xF000) >> 12);
3037         for (i = 0; i < 8; i++)
3038                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3039         if ((regs[12] & 0x80) == 0)
3040                 return MXSER_ERR_VECTOR;
3041         hwconf->vector = (int)regs[11]; /* interrupt vector */
3042         if (id == 1)
3043                 hwconf->vector_mask = 0x00FF;
3044         else
3045                 hwconf->vector_mask = 0x000F;
3046         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3047                 if (regs[12] & bits) {
3048                         hwconf->baud_base[i] = 921600;
3049                         hwconf->MaxCanSetBaudRate[i] = 921600;  /* add by Victor Yu. 09-04-2002 */
3050                 } else {
3051                         hwconf->baud_base[i] = 115200;
3052                         hwconf->MaxCanSetBaudRate[i] = 115200;  /* add by Victor Yu. 09-04-2002 */
3053                 }
3054         }
3055         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3056         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3057         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3058         outb(scratch2, cap + UART_LCR);
3059         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3060         scratch = inb(cap + UART_IIR);
3061
3062         if (scratch & 0xC0)
3063                 hwconf->uart_type = PORT_16550A;
3064         else
3065                 hwconf->uart_type = PORT_16450;
3066         if (id == 1)
3067                 hwconf->ports = 8;
3068         else
3069                 hwconf->ports = 4;
3070         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3071         request_region(hwconf->vector, 1, "mxser(vector)");
3072         return hwconf->ports;
3073 }
3074
3075 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3076 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3077 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3078 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3079 #define EN_CCMD         0x000   /* Chip's command register     */
3080 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3081 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3082 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3083 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3084 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3085 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3086 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3087 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3088 static int mxser_read_register(int port, unsigned short *regs)
3089 {
3090         int i, k, value, id;
3091         unsigned int j;
3092
3093         id = mxser_program_mode(port);
3094         if (id < 0)
3095                 return id;
3096         for (i = 0; i < 14; i++) {
3097                 k = (i & 0x3F) | 0x180;
3098                 for (j = 0x100; j > 0; j >>= 1) {
3099                         outb(CHIP_CS, port);
3100                         if (k & j) {
3101                                 outb(CHIP_CS | CHIP_DO, port);
3102                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3103                         } else {
3104                                 outb(CHIP_CS, port);
3105                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3106                         }
3107                 }
3108                 (void)inb(port);
3109                 value = 0;
3110                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3111                         outb(CHIP_CS, port);
3112                         outb(CHIP_CS | CHIP_SK, port);
3113                         if (inb(port) & CHIP_DI)
3114                                 value |= j;
3115                 }
3116                 regs[i] = value;
3117                 outb(0, port);
3118         }
3119         mxser_normal_mode(port);
3120         return id;
3121 }
3122
3123 static int mxser_program_mode(int port)
3124 {
3125         int id, i, j, n;
3126         /* unsigned long flags; */
3127
3128         spin_lock(&gm_lock);
3129         outb(0, port);
3130         outb(0, port);
3131         outb(0, port);
3132         (void)inb(port);
3133         (void)inb(port);
3134         outb(0, port);
3135         (void)inb(port);
3136         /* restore_flags(flags); */
3137         spin_unlock(&gm_lock);
3138
3139         id = inb(port + 1) & 0x1F;
3140         if ((id != C168_ASIC_ID) &&
3141                         (id != C104_ASIC_ID) &&
3142                         (id != C102_ASIC_ID) &&
3143                         (id != CI132_ASIC_ID) &&
3144                         (id != CI134_ASIC_ID) &&
3145                         (id != CI104J_ASIC_ID))
3146                 return -1;
3147         for (i = 0, j = 0; i < 4; i++) {
3148                 n = inb(port + 2);
3149                 if (n == 'M') {
3150                         j = 1;
3151                 } else if ((j == 1) && (n == 1)) {
3152                         j = 2;
3153                         break;
3154                 } else
3155                         j = 0;
3156         }
3157         if (j != 2)
3158                 id = -2;
3159         return id;
3160 }
3161
3162 static void mxser_normal_mode(int port)
3163 {
3164         int i, n;
3165
3166         outb(0xA5, port + 1);
3167         outb(0x80, port + 3);
3168         outb(12, port + 0);     /* 9600 bps */
3169         outb(0, port + 1);
3170         outb(0x03, port + 3);   /* 8 data bits */
3171         outb(0x13, port + 4);   /* loop back mode */
3172         for (i = 0; i < 16; i++) {
3173                 n = inb(port + 5);
3174                 if ((n & 0x61) == 0x60)
3175                         break;
3176                 if ((n & 1) == 1)
3177                         (void)inb(port);
3178         }
3179         outb(0x00, port + 4);
3180 }
3181
3182 module_init(mxser_module_init);
3183 module_exit(mxser_module_exit);