drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2001  Moxa Technologies (support@moxa.com.tw).
   5  *
   6  *      This code is loosely based on the Linux serial driver, written by
   7  *      Linus Torvalds, Theodore T'so and others.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12 *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *      Original release        10/26/00
  24  *
  25  *      02/06/01        Support MOXA Industio family boards.
  26  *      02/06/01        Support TIOCGICOUNT.
  27  *      02/06/01        Fix the problem for connecting to serial mouse.
  28  *      02/06/01        Fix the problem for H/W flow control.
  29  *      02/06/01        Fix the compling warning when CONFIG_PCI
  30  *                      don't be defined.
  31  *
  32  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  33  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  34  *      - Fixed x86_64 cleanness
  35  *      - Fixed sleep with spinlock held in mxser_send_break
  36  */
  37
  38
  39 #include <linux/config.h>
  40 #include <linux/module.h>
  41 #include <linux/version.h>
  42 #include <linux/autoconf.h>
  43 #include <linux/errno.h>
  44 #include <linux/signal.h>
  45 #include <linux/sched.h>
  46 #include <linux/timer.h>
  47 #include <linux/interrupt.h>
  48 #include <linux/tty.h>
  49 #include <linux/tty_flip.h>
  50 #include <linux/serial.h>
  51 #include <linux/serial_reg.h>
  52 #include <linux/major.h>
  53 #include <linux/string.h>
  54 #include <linux/fcntl.h>
  55 #include <linux/ptrace.h>
  56 #include <linux/gfp.h>
  57 #include <linux/ioport.h>
  58 #include <linux/mm.h>
  59 #include <linux/smp_lock.h>
  60 #include <linux/delay.h>
  61 #include <linux/pci.h>
  62
  63 #include <asm/system.h>
  64 #include <asm/io.h>
  65 #include <asm/irq.h>
  66 #include <asm/bitops.h>
  67 #include <asm/uaccess.h>
  68
  69 #include "mxser.h"
  70
  71 #define MXSER_VERSION   "1.8"
  72 #define MXSERMAJOR       174
  73 #define MXSERCUMAJOR     175
  74
  75 #define MXSER_EVENT_TXLOW        1
  76 #define MXSER_EVENT_HANGUP       2
  77
  78 #define MXSER_BOARDS            4       /* Max. boards */
  79 #define MXSER_PORTS             32      /* Max. ports */
  80 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  81 #define MXSER_ISR_PASS_LIMIT    256
  82
  83 #define MXSER_ERR_IOADDR        -1
  84 #define MXSER_ERR_IRQ           -2
  85 #define MXSER_ERR_IRQ_CONFLIT   -3
  86 #define MXSER_ERR_VECTOR        -4
  87
  88 #define SERIAL_TYPE_NORMAL      1
  89 #define SERIAL_TYPE_CALLOUT     2
  90
  91 #define WAKEUP_CHARS            256
  92
  93 #define UART_MCR_AFE            0x20
  94 #define UART_LSR_SPECIAL        0x1E
  95
  96 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
  97
  98 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
  99
 100 #define C168_ASIC_ID    1
 101 #define C104_ASIC_ID    2
 102 #define C102_ASIC_ID    0xB
 103 #define CI132_ASIC_ID   4
 104 #define CI134_ASIC_ID   3
 105 #define CI104J_ASIC_ID  5
 106
 107 enum {
 108         MXSER_BOARD_C168_ISA = 1,
 109         MXSER_BOARD_C104_ISA,
 110         MXSER_BOARD_CI104J,
 111         MXSER_BOARD_C168_PCI,
 112         MXSER_BOARD_C104_PCI,
 113         MXSER_BOARD_C102_ISA,
 114         MXSER_BOARD_CI132,
 115         MXSER_BOARD_CI134,
 116         MXSER_BOARD_CP132,
 117         MXSER_BOARD_CP114,
 118         MXSER_BOARD_CT114,
 119         MXSER_BOARD_CP102,
 120         MXSER_BOARD_CP104U,
 121         MXSER_BOARD_CP168U,
 122         MXSER_BOARD_CP132U,
 123         MXSER_BOARD_CP134U,
 124         MXSER_BOARD_CP104JU,
 125         MXSER_BOARD_RC7000,
 126         MXSER_BOARD_CP118U,
 127         MXSER_BOARD_CP102UL,
 128         MXSER_BOARD_CP102U,
 129 };
 130
 131 static char *mxser_brdname[] = {
 132         "C168 series",
 133         "C104 series",
 134         "CI-104J series",
 135         "C168H/PCI series",
 136         "C104H/PCI series",
 137         "C102 series",
 138         "CI-132 series",
 139         "CI-134 series",
 140         "CP-132 series",
 141         "CP-114 series",
 142         "CT-114 series",
 143         "CP-102 series",
 144         "CP-104U series",
 145         "CP-168U series",
 146         "CP-132U series",
 147         "CP-134U series",
 148         "CP-104JU series",
 149         "Moxa UC7000 Serial",
 150         "CP-118U series",
 151         "CP-102UL series",
 152         "CP-102U series",
 153 };
 154
 155 static int mxser_numports[] = {
 156         8,                      // C168-ISA
 157         4,                      // C104-ISA
 158         4,                      // CI104J
 159         8,                      // C168-PCI
 160         4,                      // C104-PCI
 161         2,                      // C102-ISA
 162         2,                      // CI132
 163         4,                      // CI134
 164         2,                      // CP132
 165         4,                      // CP114
 166         4,                      // CT114
 167         2,                      // CP102
 168         4,                      // CP104U
 169         8,                      // CP168U
 170         2,                      // CP132U
 171         4,                      // CP134U
 172         4,                      // CP104JU
 173         8,                      // RC7000
 174         8,                      // CP118U
 175         2,                      // CP102UL
 176         2,                      // CP102U
 177 };
 178
 179 #define UART_TYPE_NUM   2
 180
 181 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 182         MOXA_MUST_MU150_HWID,
 183         MOXA_MUST_MU860_HWID
 184 };
 185
 186 // This is only for PCI
 187 #define UART_INFO_NUM   3
 188 struct mxpciuart_info {
 189         int type;
 190         int tx_fifo;
 191         int rx_fifo;
 192         int xmit_fifo_size;
 193         int rx_high_water;
 194         int rx_trigger;
 195         int rx_low_water;
 196         long max_baud;
 197 };
 198
 199 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 200         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 201         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 202         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 203 };
 204
 205
 206 #ifdef CONFIG_PCI
 207
 208 static struct pci_device_id mxser_pcibrds[] = {
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 222         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 223         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 224         {0}
 225 };
 226
 227 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 228
 229
 230 #endif
 231
 232 typedef struct _moxa_pci_info {
 233         unsigned short busNum;
 234         unsigned short devNum;
 235         struct pci_dev *pdev;   // add by Victor Yu. 06-23-2003
 236 } moxa_pci_info;
 237
 238 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 239 static int ttymajor = MXSERMAJOR;
 240 static int calloutmajor = MXSERCUMAJOR;
 241 static int verbose = 0;
 242
 243 /* Variables for insmod */
 244
 245 MODULE_AUTHOR("Casper Yang");
 246 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 247 MODULE_PARM(ioaddr, "1-4i");
 248 MODULE_PARM(ttymajor, "i");
 249 MODULE_PARM(calloutmajor, "i");
 250 MODULE_PARM(verbose, "i");
 251 MODULE_LICENSE("GPL");
 252
 253 struct mxser_log {
 254         int tick;
 255         unsigned long rxcnt[MXSER_PORTS];
 256         unsigned long txcnt[MXSER_PORTS];
 257 };
 258
 259
 260 struct mxser_mon {
 261         unsigned long rxcnt;
 262         unsigned long txcnt;
 263         unsigned long up_rxcnt;
 264         unsigned long up_txcnt;
 265         int modem_status;
 266         unsigned char hold_reason;
 267 };
 268
 269 struct mxser_mon_ext {
 270         unsigned long rx_cnt[32];
 271         unsigned long tx_cnt[32];
 272         unsigned long up_rxcnt[32];
 273         unsigned long up_txcnt[32];
 274         int modem_status[32];
 275
 276         long baudrate[32];
 277         int databits[32];
 278         int stopbits[32];
 279         int parity[32];
 280         int flowctrl[32];
 281         int fifo[32];
 282         int iftype[32];
 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
 350 struct mxser_mstatus {
 351         tcflag_t cflag;
 352         int cts;
 353         int dsr;
 354         int ri;
 355         int dcd;
 356 };
 357
 358 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 359
 360 static int mxserBoardCAP[MXSER_BOARDS] = {
 361         0, 0, 0, 0
 362             /*  0x180, 0x280, 0x200, 0x320   */
 363 };
 364
 365 static struct tty_driver *mxvar_sdriver;
 366 static struct mxser_struct mxvar_table[MXSER_PORTS];
 367 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 368 static struct termios *mxvar_termios[MXSER_PORTS + 1];
 369 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
 370 static struct mxser_log mxvar_log;
 371 static int mxvar_diagflag;
 372 static unsigned char mxser_msr[MXSER_PORTS + 1];
 373 static struct mxser_mon_ext mon_data_ext;
 374 static int mxser_set_baud_method[MXSER_PORTS + 1];
 375 static spinlock_t gm_lock;
 376
 377 /*
 378  * This is used to figure out the divisor speeds and the timeouts
 379  */
 380
 381 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 382
 383 /*
 384  * static functions:
 385  */
 386
 387 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 388 static int mxser_init(void);
 389
 390 //static void   mxser_poll(unsigned long);
 391 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 392 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 393 static void mxser_do_softint(void *);
 394 static int mxser_open(struct tty_struct *, struct file *);
 395 static void mxser_close(struct tty_struct *, struct file *);
 396 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 397 static int mxser_write_room(struct tty_struct *);
 398 static void mxser_flush_buffer(struct tty_struct *);
 399 static int mxser_chars_in_buffer(struct tty_struct *);
 400 static void mxser_flush_chars(struct tty_struct *);
 401 static void mxser_put_char(struct tty_struct *, unsigned char);
 402 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 403 static int mxser_ioctl_special(unsigned int, void __user *);
 404 static void mxser_throttle(struct tty_struct *);
 405 static void mxser_unthrottle(struct tty_struct *);
 406 static void mxser_set_termios(struct tty_struct *, struct termios *);
 407 static void mxser_stop(struct tty_struct *);
 408 static void mxser_start(struct tty_struct *);
 409 static void mxser_hangup(struct tty_struct *);
 410 static void mxser_rs_break(struct tty_struct *, int);
 411 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
 412 static void mxser_receive_chars(struct mxser_struct *, int *);
 413 static void mxser_transmit_chars(struct mxser_struct *);
 414 static void mxser_check_modem_status(struct mxser_struct *, int);
 415 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 416 static int mxser_startup(struct mxser_struct *);
 417 static void mxser_shutdown(struct mxser_struct *);
 418 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
 419 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 420 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 421 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 422 static void mxser_send_break(struct mxser_struct *, int);
 423 static int mxser_tiocmget(struct tty_struct *, struct file *);
 424 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 425 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 426 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 427
 428 static void mxser_startrx(struct tty_struct *tty);
 429 static void mxser_stoprx(struct tty_struct *tty);
 430
 431
 432 static int CheckIsMoxaMust(int io)
 433 {
 434         u8 oldmcr, hwid;
 435         int i;
 436
 437         outb(0, io + UART_LCR);
 438         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 439         oldmcr = inb(io + UART_MCR);
 440         outb(0, io + UART_MCR);
 441         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 442         if ((hwid = inb(io + UART_MCR)) != 0) {
 443                 outb(oldmcr, io + UART_MCR);
 444                 return (MOXA_OTHER_UART);
 445         }
 446
 447         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 448         for (i = 0; i < UART_TYPE_NUM; i++) {
 449                 if (hwid == Gmoxa_uart_id[i])
 450                         return (int) hwid;
 451         }
 452         return MOXA_OTHER_UART;
 453 }
 454
 455 // above is modified by Victor Yu. 08-15-2002
 456
 457 static struct tty_operations mxser_ops = {
 458         .open = mxser_open,
 459         .close = mxser_close,
 460         .write = mxser_write,
 461         .put_char = mxser_put_char,
 462         .flush_chars = mxser_flush_chars,
 463         .write_room = mxser_write_room,
 464         .chars_in_buffer = mxser_chars_in_buffer,
 465         .flush_buffer = mxser_flush_buffer,
 466         .ioctl = mxser_ioctl,
 467         .throttle = mxser_throttle,
 468         .unthrottle = mxser_unthrottle,
 469         .set_termios = mxser_set_termios,
 470         .stop = mxser_stop,
 471         .start = mxser_start,
 472         .hangup = mxser_hangup,
 473         .break_ctl = mxser_rs_break,
 474         .wait_until_sent = mxser_wait_until_sent,
 475         .tiocmget = mxser_tiocmget,
 476         .tiocmset = mxser_tiocmset,
 477 };
 478
 479 /*
 480  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 481  */
 482
 483 static int __init mxser_module_init(void)
 484 {
 485         int ret;
 486
 487         if (verbose)
 488                 printk(KERN_DEBUG "Loading module mxser ...\n");
 489         ret = mxser_init();
 490         if (verbose)
 491                 printk(KERN_DEBUG "Done.\n");
 492         return ret;
 493 }
 494
 495 static void __exit mxser_module_exit(void)
 496 {
 497         int i, err = 0;
 498
 499         if (verbose)
 500                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 501
 502         if ((err |= tty_unregister_driver(mxvar_sdriver)))
 503                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 504
 505         for (i = 0; i < MXSER_BOARDS; i++) {
 506                 struct pci_dev *pdev;
 507
 508                 if (mxsercfg[i].board_type == -1)
 509                         continue;
 510                 else {
 511                         pdev = mxsercfg[i].pciInfo.pdev;
 512                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 513                         if (pdev != NULL) {     //PCI
 514                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 515                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 516                         } else {
 517                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 518                                 release_region(mxsercfg[i].vector, 1);
 519                         }
 520                 }
 521         }
 522         if (verbose)
 523                 printk(KERN_DEBUG "Done.\n");
 524
 525 }
 526
 527 static void process_txrx_fifo(struct mxser_struct *info)
 528 {
 529         int i;
 530
 531         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 532                 info->rx_trigger = 1;
 533                 info->rx_high_water = 1;
 534                 info->rx_low_water = 1;
 535                 info->xmit_fifo_size = 1;
 536         } else {
 537                 for (i = 0; i < UART_INFO_NUM; i++) {
 538                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 539                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 540                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 541                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 542                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 543                                 break;
 544                         }
 545                 }
 546         }
 547 }
 548
 549 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 550 {
 551         struct mxser_struct *info;
 552         int retval;
 553         int i, n;
 554
 555         n = board * MXSER_PORTS_PER_BOARD;
 556         info = &mxvar_table[n];
 557         /*if (verbose) */  {
 558                 printk(KERN_DEBUG "        ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
 559                 printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
 560         }
 561
 562         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 563                 info->port = n;
 564                 info->base = hwconf->ioaddr[i];
 565                 info->irq = hwconf->irq;
 566                 info->vector = hwconf->vector;
 567                 info->vectormask = hwconf->vector_mask;
 568                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
 569                 info->stop_rx = 0;
 570                 info->ldisc_stop_rx = 0;
 571
 572                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 573                 //Enhance mode enabled here
 574                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 575                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 576                 }
 577
 578                 info->flags = ASYNC_SHARE_IRQ;
 579                 info->type = hwconf->uart_type;
 580                 info->baud_base = hwconf->baud_base[i];
 581
 582                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 583
 584                 process_txrx_fifo(info);
 585
 586
 587                 info->custom_divisor = hwconf->baud_base[i] * 16;
 588                 info->close_delay = 5 * HZ / 10;
 589                 info->closing_wait = 30 * HZ;
 590                 INIT_WORK(&info->tqueue, mxser_do_softint, info);
 591                 info->normal_termios = mxvar_sdriver->init_termios;
 592                 init_waitqueue_head(&info->open_wait);
 593                 init_waitqueue_head(&info->close_wait);
 594                 init_waitqueue_head(&info->delta_msr_wait);
 595                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 596                 info->err_shadow = 0;
 597                 spin_lock_init(&info->slock);
 598         }
 599         /*
 600          * Allocate the IRQ if necessary
 601          */
 602
 603
 604         /* before set INT ISR, disable all int */
 605         for (i = 0; i < hwconf->ports; i++) {
 606                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
 607         }
 608
 609         n = board * MXSER_PORTS_PER_BOARD;
 610         info = &mxvar_table[n];
 611
 612         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
 613         if (retval) {
 614                 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
 615                 printk("  Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
 616                 return retval;
 617         }
 618         return 0;
 619 }
 620
 621
 622 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 623 {
 624         mxsercfg[board] = *hwconf;
 625 }
 626
 627 #ifdef CONFIG_PCI
 628 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 629 {
 630         int i, j;
 631 //      unsigned int    val;
 632         unsigned int ioaddress;
 633         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 634
 635         //io address
 636         hwconf->board_type = board_type;
 637         hwconf->ports = mxser_numports[board_type - 1];
 638         ioaddress = pci_resource_start(pdev, 2);
 639         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
 640
 641         for (i = 0; i < hwconf->ports; i++) {
 642                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 643         }
 644
 645         //vector
 646         ioaddress = pci_resource_start(pdev, 3);
 647         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
 648         hwconf->vector = ioaddress;
 649
 650         //irq
 651         hwconf->irq = hwconf->pciInfo.pdev->irq;
 652
 653         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 654         hwconf->uart_type = PORT_16550A;
 655         hwconf->vector_mask = 0;
 656
 657
 658         for (i = 0; i < hwconf->ports; i++) {
 659                 for (j = 0; j < UART_INFO_NUM; j++) {
 660                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 661                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 662
 663                                 //exception....CP-102
 664                                 if (board_type == MXSER_BOARD_CP102)
 665                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 666                                 break;
 667                         }
 668                 }
 669         }
 670
 671         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 672                 for (i = 0; i < hwconf->ports; i++) {
 673                         if (i < 4)
 674                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 675                         else
 676                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 677                 }
 678                 outb(0, ioaddress + 4); // default set to RS232 mode
 679                 outb(0, ioaddress + 0x0c);      //default set to RS232 mode
 680         }
 681
 682         for (i = 0; i < hwconf->ports; i++) {
 683                 hwconf->vector_mask |= (1 << i);
 684                 hwconf->baud_base[i] = 921600;
 685         }
 686         return (0);
 687 }
 688 #endif
 689
 690 static int mxser_init(void)
 691 {
 692         int i, m, retval, b, n;
 693         int ret1;
 694         struct pci_dev *pdev = NULL;
 695         int index;
 696         unsigned char busnum, devnum;
 697         struct mxser_hwconf hwconf;
 698
 699         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 700         if (!mxvar_sdriver)
 701                 return -ENOMEM;
 702         spin_lock_init(&gm_lock);
 703
 704         for (i = 0; i < MXSER_BOARDS; i++) {
 705                 mxsercfg[i].board_type = -1;
 706         }
 707
 708         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
 709
 710         /* Initialize the tty_driver structure */
 711         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 712         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 713         mxvar_sdriver->name = "ttyM";
 714         mxvar_sdriver->major = ttymajor;
 715         mxvar_sdriver->minor_start = 0;
 716         mxvar_sdriver->num = MXSER_PORTS + 1;
 717         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 718         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 719         mxvar_sdriver->init_termios = tty_std_termios;
 720         mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 721         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 722         tty_set_operations(mxvar_sdriver, &mxser_ops);
 723         mxvar_sdriver->ttys = mxvar_tty;
 724         mxvar_sdriver->termios = mxvar_termios;
 725         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 726
 727         mxvar_diagflag = 0;
 728         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 729         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 730
 731         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 732         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 733         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 734         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 735
 736         m = 0;
 737         /* Start finding ISA boards here */
 738         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 739                 int cap;
 740                 if (!(cap = mxserBoardCAP[b]))
 741                         continue;
 742
 743                 retval = mxser_get_ISA_conf(cap, &hwconf);
 744
 745                 if (retval != 0)
 746                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 747
 748                 if (retval <= 0) {
 749                         if (retval == MXSER_ERR_IRQ)
 750                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 751                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 752                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 753                         else if (retval == MXSER_ERR_VECTOR)
 754                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 755                         else if (retval == MXSER_ERR_IOADDR)
 756                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 757
 758                         continue;
 759                 }
 760
 761                 hwconf.pciInfo.busNum = 0;
 762                 hwconf.pciInfo.devNum = 0;
 763                 hwconf.pciInfo.pdev = NULL;
 764
 765                 mxser_getcfg(m, &hwconf);
 766                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 767                 //mxser_initbrd will hook ISR.
 768                 if (mxser_initbrd(m, &hwconf) < 0)
 769                         continue;
 770
 771
 772                 m++;
 773         }
 774
 775         /* Start finding ISA boards from module arg */
 776         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 777                 int cap;
 778                 if (!(cap = ioaddr[b]))
 779                         continue;
 780
 781                 retval = mxser_get_ISA_conf(cap, &hwconf);
 782
 783                 if (retval != 0)
 784                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 785
 786                 if (retval <= 0) {
 787                         if (retval == MXSER_ERR_IRQ)
 788                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 789                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 790                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 791                         else if (retval == MXSER_ERR_VECTOR)
 792                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 793                         else if (retval == MXSER_ERR_IOADDR)
 794                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 795
 796                         continue;
 797                 }
 798
 799                 hwconf.pciInfo.busNum = 0;
 800                 hwconf.pciInfo.devNum = 0;
 801                 hwconf.pciInfo.pdev = NULL;
 802
 803                 mxser_getcfg(m, &hwconf);
 804                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 805                 //mxser_initbrd will hook ISR.
 806                 if (mxser_initbrd(m, &hwconf) < 0)
 807                         continue;
 808
 809                 m++;
 810         }
 811
 812         /* start finding PCI board here */
 813 #ifdef CONFIG_PCI
 814         n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
 815         index = 0;
 816         b = 0;
 817         while (b < n) {
 818                 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
 819                         if (pdev == NULL) {
 820                         b++;
 821                         continue;
 822                 }
 823                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 824                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 825                 hwconf.pciInfo.pdev = pdev;
 826                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
 827                 index++;
 828                 if (m >= MXSER_BOARDS) {
 829                         printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
 830                 } else {
 831                         if (pci_enable_device(pdev)) {
 832                                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
 833                                 continue;
 834                         }
 835                         retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
 836                         if (retval < 0) {
 837                                 if (retval == MXSER_ERR_IRQ)
 838                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 839                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 840                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 841                                 else if (retval == MXSER_ERR_VECTOR)
 842                                         printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 843                                 else if (retval == MXSER_ERR_IOADDR)
 844                                         printk(KERN_ERR "Invalid I/O address,board not configured\n");
 845                                 continue;
 846                         }
 847                         mxser_getcfg(m, &hwconf);
 848                         //init mxsercfg first, or mxsercfg data is not correct on ISR.
 849                         //mxser_initbrd will hook ISR.
 850                         if (mxser_initbrd(m, &hwconf) < 0)
 851                                 continue;
 852                         m++;
 853                 }
 854         }
 855 #endif
 856
 857         ret1 = 0;
 858         if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
 859                 return 0;
 860         } else
 861                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
 862
 863
 864         if (ret1) {
 865                 for (i = 0; i < MXSER_BOARDS; i++) {
 866                         if (mxsercfg[i].board_type == -1)
 867                                 continue;
 868                         else {
 869                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 870                                 //todo: release io, vector
 871                         }
 872                 }
 873                 return -1;
 874         }
 875
 876         return (0);
 877 }
 878
 879 static void mxser_do_softint(void *private_)
 880 {
 881         struct mxser_struct *info = (struct mxser_struct *) private_;
 882         struct tty_struct *tty;
 883
 884         tty = info->tty;
 885
 886         if (tty) {
 887                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 888                         tty_wakeup(tty);
 889                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 890                         tty_hangup(tty);
 891         }
 892 }
 893
 894 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 895 {
 896         unsigned char status = 0;
 897
 898         status = inb(baseaddr + UART_MSR);
 899
 900         mxser_msr[port] &= 0x0F;
 901         mxser_msr[port] |= status;
 902         status = mxser_msr[port];
 903         if (mode)
 904                 mxser_msr[port] = 0;
 905
 906         return status;
 907 }
 908
 909 /*
 910  * This routine is called whenever a serial port is opened.  It
 911  * enables interrupts for a serial port, linking in its async structure into
 912  * the IRQ chain.   It also performs the serial-specific
 913  * initialization for the tty structure.
 914  */
 915 static int mxser_open(struct tty_struct *tty, struct file *filp)
 916 {
 917         struct mxser_struct *info;
 918         int retval, line;
 919
 920         line = tty->index;
 921         if (line == MXSER_PORTS)
 922                 return 0;
 923         if (line < 0 || line > MXSER_PORTS)
 924                 return -ENODEV;
 925         info = mxvar_table + line;
 926         if (!info->base)
 927                 return (-ENODEV);
 928
 929         tty->driver_data = info;
 930         info->tty = tty;
 931         /*
 932          * Start up serial port
 933          */
 934         retval = mxser_startup(info);
 935         if (retval)
 936                 return (retval);
 937
 938         retval = mxser_block_til_ready(tty, filp, info);
 939         if (retval)
 940                 return (retval);
 941
 942         info->count++;
 943
 944         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 945                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 946                         *tty->termios = info->normal_termios;
 947                 else
 948                         *tty->termios = info->callout_termios;
 949                 mxser_change_speed(info, NULL);
 950         }
 951
 952         info->session = current->signal->session;
 953         info->pgrp = process_group(current);
 954         clear_bit(TTY_DONT_FLIP, &tty->flags);
 955
 956         //status = mxser_get_msr(info->base, 0, info->port);
 957         //mxser_check_modem_status(info, status);
 958
 959 /* unmark here for very high baud rate (ex. 921600 bps) used
 960 */
 961         tty->low_latency = 1;
 962         return 0;
 963 }
 964
 965 /*
 966  * This routine is called when the serial port gets closed.  First, we
 967  * wait for the last remaining data to be sent.  Then, we unlink its
 968  * async structure from the interrupt chain if necessary, and we free
 969  * that IRQ if nothing is left in the chain.
 970  */
 971 static void mxser_close(struct tty_struct *tty, struct file *filp)
 972 {
 973         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
 974
 975         unsigned long timeout;
 976         unsigned long flags;
 977         struct tty_ldisc *ld;
 978
 979         if (tty->index == MXSER_PORTS)
 980                 return;
 981         if (!info)
 982                 BUG();
 983
 984         spin_lock_irqsave(&info->slock, flags);
 985
 986         if (tty_hung_up_p(filp)) {
 987                 spin_unlock_irqrestore(&info->slock, flags);
 988                 return;
 989         }
 990         if ((tty->count == 1) && (info->count != 1)) {
 991                 /*
 992                  * Uh, oh.  tty->count is 1, which means that the tty
 993                  * structure will be freed.  Info->count should always
 994                  * be one in these conditions.  If it's greater than
 995                  * one, we've got real problems, since it means the
 996                  * serial port won't be shutdown.
 997                  */
 998                 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
 999                 info->count = 1;
1000         }
1001         if (--info->count < 0) {
1002                 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1003                 info->count = 0;
1004         }
1005         if (info->count) {
1006                 spin_unlock_irqrestore(&info->slock, flags);
1007                 return;
1008         }
1009         info->flags |= ASYNC_CLOSING;
1010         spin_unlock_irqrestore(&info->slock, flags);
1011         /*
1012          * Save the termios structure, since this port may have
1013          * separate termios for callout and dialin.
1014          */
1015         if (info->flags & ASYNC_NORMAL_ACTIVE)
1016                 info->normal_termios = *tty->termios;
1017         /*
1018          * Now we wait for the transmit buffer to clear; and we notify
1019          * the line discipline to only process XON/XOFF characters.
1020          */
1021         tty->closing = 1;
1022         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1023                 tty_wait_until_sent(tty, info->closing_wait);
1024         /*
1025          * At this point we stop accepting input.  To do this, we
1026          * disable the receive line status interrupts, and tell the
1027          * interrupt driver to stop checking the data ready bit in the
1028          * line status register.
1029          */
1030         info->IER &= ~UART_IER_RLSI;
1031         if (info->IsMoxaMustChipFlag)
1032                 info->IER &= ~MOXA_MUST_RECV_ISR;
1033 /* by William
1034         info->read_status_mask &= ~UART_LSR_DR;
1035 */
1036         if (info->flags & ASYNC_INITIALIZED) {
1037                 outb(info->IER, info->base + UART_IER);
1038                 /*
1039                  * Before we drop DTR, make sure the UART transmitter
1040                  * has completely drained; this is especially
1041                  * important if there is a transmit FIFO!
1042                  */
1043                 timeout = jiffies + HZ;
1044                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1045                         schedule_timeout_interruptible(5);
1046                         if (time_after(jiffies, timeout))
1047                                 break;
1048                 }
1049         }
1050         mxser_shutdown(info);
1051
1052         if (tty->driver->flush_buffer)
1053                 tty->driver->flush_buffer(tty);
1054
1055         ld = tty_ldisc_ref(tty);
1056         if (ld) {
1057                 if(ld->flush_buffer)
1058                         ld->flush_buffer(tty);
1059                 tty_ldisc_deref(ld);
1060         }
1061
1062         tty->closing = 0;
1063         info->event = 0;
1064         info->tty = NULL;
1065         if (info->blocked_open) {
1066                 if (info->close_delay)
1067                         schedule_timeout_interruptible(info->close_delay);
1068                 wake_up_interruptible(&info->open_wait);
1069         }
1070
1071         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1072         wake_up_interruptible(&info->close_wait);
1073
1074 }
1075
1076 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1077 {
1078         int c, total = 0;
1079         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1080         unsigned long flags;
1081
1082         if (!tty || !info->xmit_buf)
1083                 return (0);
1084
1085         while (1) {
1086                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1087                 if (c <= 0)
1088                         break;
1089
1090                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1091                 spin_lock_irqsave(&info->slock, flags);
1092                 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1093                 info->xmit_cnt += c;
1094                 spin_unlock_irqrestore(&info->slock, flags);
1095
1096                 buf += c;
1097                 count -= c;
1098                 total += c;
1099
1100         }
1101
1102         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1103                 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1104                         spin_lock_irqsave(&info->slock, flags);
1105                         info->IER |= UART_IER_THRI;
1106                         outb(info->IER, info->base + UART_IER);
1107                         spin_unlock_irqrestore(&info->slock, flags);
1108                 }
1109         }
1110         return total;
1111 }
1112
1113 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1114 {
1115         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1116         unsigned long flags;
1117
1118         if (!tty || !info->xmit_buf)
1119                 return;
1120
1121         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1122                 return;
1123
1124         spin_lock_irqsave(&info->slock, flags);
1125         info->xmit_buf[info->xmit_head++] = ch;
1126         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1127         info->xmit_cnt++;
1128         spin_unlock_irqrestore(&info->slock, flags);
1129         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1130                 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1131                         spin_lock_irqsave(&info->slock, flags);
1132                         info->IER |= UART_IER_THRI;
1133                         outb(info->IER, info->base + UART_IER);
1134                         spin_unlock_irqrestore(&info->slock, flags);
1135                 }
1136         }
1137 }
1138
1139
1140 static void mxser_flush_chars(struct tty_struct *tty)
1141 {
1142         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1143         unsigned long flags;
1144
1145         if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1146                 return;
1147
1148         spin_lock_irqsave(&info->slock, flags);
1149
1150         info->IER |= UART_IER_THRI;
1151         outb(info->IER, info->base + UART_IER);
1152
1153         spin_unlock_irqrestore(&info->slock, flags);
1154 }
1155
1156 static int mxser_write_room(struct tty_struct *tty)
1157 {
1158         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1159         int ret;
1160
1161         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1162         if (ret < 0)
1163                 ret = 0;
1164         return (ret);
1165 }
1166
1167 static int mxser_chars_in_buffer(struct tty_struct *tty)
1168 {
1169         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1170         return info->xmit_cnt;
1171 }
1172
1173 static void mxser_flush_buffer(struct tty_struct *tty)
1174 {
1175         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1176         char fcr;
1177         unsigned long flags;
1178
1179
1180         spin_lock_irqsave(&info->slock, flags);
1181         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1182
1183         /* below added by shinhay */
1184         fcr = inb(info->base + UART_FCR);
1185         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1186         outb(fcr, info->base + UART_FCR);
1187
1188         spin_unlock_irqrestore(&info->slock, flags);
1189         /* above added by shinhay */
1190
1191         wake_up_interruptible(&tty->write_wait);
1192         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1193                 (tty->ldisc.write_wakeup) (tty);
1194 }
1195
1196 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1197 {
1198         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1199         int retval;
1200         struct async_icount cprev, cnow;        /* kernel counter temps */
1201         struct serial_icounter_struct __user *p_cuser;
1202         unsigned long templ;
1203         unsigned long flags;
1204         void __user *argp = (void __user *)arg;
1205
1206         if (tty->index == MXSER_PORTS)
1207                 return (mxser_ioctl_special(cmd, argp));
1208
1209         // following add by Victor Yu. 01-05-2004
1210         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1211                 int opmode, p;
1212                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1213                 int shiftbit;
1214                 unsigned char val, mask;
1215
1216                 p = info->port % 4;
1217                 if (cmd == MOXA_SET_OP_MODE) {
1218                         if (get_user(opmode, (int __user *) argp))
1219                                 return -EFAULT;
1220                         if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1221                                 return -EFAULT;
1222                         mask = ModeMask[p];
1223                         shiftbit = p * 2;
1224                         val = inb(info->opmode_ioaddr);
1225                         val &= mask;
1226                         val |= (opmode << shiftbit);
1227                         outb(val, info->opmode_ioaddr);
1228                 } else {
1229                         shiftbit = p * 2;
1230                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1231                         opmode &= OP_MODE_MASK;
1232                         if (copy_to_user(argp, &opmode, sizeof(int)))
1233                                 return -EFAULT;
1234                 }
1235                 return 0;
1236         }
1237         // above add by Victor Yu. 01-05-2004
1238
1239         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1240                 if (tty->flags & (1 << TTY_IO_ERROR))
1241                         return (-EIO);
1242         }
1243         switch (cmd) {
1244         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1245                 retval = tty_check_change(tty);
1246                 if (retval)
1247                         return (retval);
1248                 tty_wait_until_sent(tty, 0);
1249                 if (!arg)
1250                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1251                 return (0);
1252         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1253                 retval = tty_check_change(tty);
1254                 if (retval)
1255                         return (retval);
1256                 tty_wait_until_sent(tty, 0);
1257                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1258                 return (0);
1259         case TIOCGSOFTCAR:
1260                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1261         case TIOCSSOFTCAR:
1262                 if (get_user(templ, (unsigned long __user *) argp))
1263                         return -EFAULT;
1264                 arg = templ;
1265                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1266                 return (0);
1267         case TIOCGSERIAL:
1268                 return mxser_get_serial_info(info, argp);
1269         case TIOCSSERIAL:
1270                 return mxser_set_serial_info(info, argp);
1271         case TIOCSERGETLSR:     /* Get line status register */
1272                 return mxser_get_lsr_info(info, argp);
1273                 /*
1274                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1275                  * - mask passed in arg for lines of interest
1276                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1277                  * Caller should use TIOCGICOUNT to see which one it was
1278                  */
1279         case TIOCMIWAIT:{
1280                         DECLARE_WAITQUEUE(wait, current);
1281                         int ret;
1282                         spin_lock_irqsave(&info->slock, flags);
1283                         cprev = info->icount;   /* note the counters on entry */
1284                         spin_unlock_irqrestore(&info->slock, flags);
1285
1286                         add_wait_queue(&info->delta_msr_wait, &wait);
1287                         while (1) {
1288                                 spin_lock_irqsave(&info->slock, flags);
1289                                 cnow = info->icount;    /* atomic copy */
1290                                 spin_unlock_irqrestore(&info->slock, flags);
1291
1292                                 set_current_state(TASK_INTERRUPTIBLE);
1293                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1294                                         ret = 0;
1295                                         break;
1296                                 }
1297                                 /* see if a signal did it */
1298                                 if (signal_pending(current)) {
1299                                         ret = -ERESTARTSYS;
1300                                         break;
1301                                 }
1302                                 cprev = cnow;
1303                         }
1304                         current->state = TASK_RUNNING;
1305                         remove_wait_queue(&info->delta_msr_wait, &wait);
1306                         break;
1307                 }
1308                 /* NOTREACHED */
1309                 /*
1310                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1311                  * Return: write counters to the user passed counter struct
1312                  * NB: both 1->0 and 0->1 transitions are counted except for
1313                  *     RI where only 0->1 is counted.
1314                  */
1315         case TIOCGICOUNT:
1316                 spin_lock_irqsave(&info->slock, flags);
1317                 cnow = info->icount;
1318                 spin_unlock_irqrestore(&info->slock, flags);
1319                 p_cuser = argp;
1320                 /* modified by casper 1/11/2000 */
1321                 if (put_user(cnow.frame, &p_cuser->frame))
1322                         return -EFAULT;
1323                 if (put_user(cnow.brk, &p_cuser->brk))
1324                         return -EFAULT;
1325                 if (put_user(cnow.overrun, &p_cuser->overrun))
1326                         return -EFAULT;
1327                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1328                         return -EFAULT;
1329                 if (put_user(cnow.parity, &p_cuser->parity))
1330                         return -EFAULT;
1331                 if (put_user(cnow.rx, &p_cuser->rx))
1332                         return -EFAULT;
1333                 if (put_user(cnow.tx, &p_cuser->tx))
1334                         return -EFAULT;
1335                 put_user(cnow.cts, &p_cuser->cts);
1336                 put_user(cnow.dsr, &p_cuser->dsr);
1337                 put_user(cnow.rng, &p_cuser->rng);
1338                 put_user(cnow.dcd, &p_cuser->dcd);
1339
1340 /* */
1341                 return 0;
1342         case MOXA_HighSpeedOn:
1343                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1344
1345         case MOXA_SDS_RSTICOUNTER:{
1346                         info->mon_data.rxcnt = 0;
1347                         info->mon_data.txcnt = 0;
1348                         return 0;
1349                 }
1350 // (above) added by James.
1351         case MOXA_ASPP_SETBAUD:{
1352                         long baud;
1353                         if (get_user(baud, (long __user *) argp))
1354                                 return -EFAULT;
1355                         mxser_set_baud(info, baud);
1356                         return 0;
1357                 }
1358         case MOXA_ASPP_GETBAUD:
1359                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1360                         return -EFAULT;
1361
1362                 return 0;
1363
1364         case MOXA_ASPP_OQUEUE:{
1365                         int len, lsr;
1366
1367                         len = mxser_chars_in_buffer(tty);
1368
1369                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1370
1371                         len += (lsr ? 0 : 1);
1372
1373                         if (copy_to_user(argp, &len, sizeof(int)))
1374                                 return -EFAULT;
1375
1376                         return 0;
1377                 }
1378         case MOXA_ASPP_MON:{
1379                         int mcr, status;
1380 //      info->mon_data.ser_param = tty->termios->c_cflag;
1381
1382                         status = mxser_get_msr(info->base, 1, info->port, info);
1383                         mxser_check_modem_status(info, status);
1384
1385                         mcr = inb(info->base + UART_MCR);
1386                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1387                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1388                         else
1389                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1390
1391                         if (mcr & MOXA_MUST_MCR_TX_XON)
1392                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1393                         else
1394                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1395
1396                         if (info->tty->hw_stopped)
1397                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1398                         else
1399                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1400
1401
1402                         if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1403                                 return -EFAULT;
1404
1405                         return 0;
1406
1407                 }
1408
1409         case MOXA_ASPP_LSTATUS:{
1410                         if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1411                                 return -EFAULT;
1412
1413                         info->err_shadow = 0;
1414                         return 0;
1415
1416                 }
1417         case MOXA_SET_BAUD_METHOD:{
1418                         int method;
1419                         if (get_user(method, (int __user *) argp))
1420                                 return -EFAULT;
1421                         mxser_set_baud_method[info->port] = method;
1422                         if (copy_to_user(argp, &method, sizeof(int)))
1423                                 return -EFAULT;
1424
1425                         return 0;
1426                 }
1427         default:
1428                 return -ENOIOCTLCMD;
1429         }
1430         return 0;
1431 }
1432
1433 #ifndef CMSPAR
1434 #define CMSPAR 010000000000
1435 #endif
1436
1437 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1438 {
1439         int i, result, status;
1440
1441         switch (cmd) {
1442         case MOXA_GET_CONF:
1443                 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1444                         return -EFAULT;
1445                 return 0;
1446         case MOXA_GET_MAJOR:
1447                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1448                         return -EFAULT;
1449                 return 0;
1450
1451         case MOXA_GET_CUMAJOR:
1452                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1453                         return -EFAULT;
1454                 return 0;
1455
1456         case MOXA_CHKPORTENABLE:
1457                 result = 0;
1458                 for (i = 0; i < MXSER_PORTS; i++) {
1459                         if (mxvar_table[i].base)
1460                                 result |= (1 << i);
1461                 }
1462                 return put_user(result, (unsigned long __user *) argp);
1463         case MOXA_GETDATACOUNT:
1464                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1465                         return -EFAULT;
1466                 return (0);
1467         case MOXA_GETMSTATUS:
1468                 for (i = 0; i < MXSER_PORTS; i++) {
1469                         GMStatus[i].ri = 0;
1470                         if (!mxvar_table[i].base) {
1471                                 GMStatus[i].dcd = 0;
1472                                 GMStatus[i].dsr = 0;
1473                                 GMStatus[i].cts = 0;
1474                                 continue;
1475                         }
1476
1477                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1478                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1479                         else
1480                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1481
1482                         status = inb(mxvar_table[i].base + UART_MSR);
1483                         if (status & 0x80 /*UART_MSR_DCD */ )
1484                                 GMStatus[i].dcd = 1;
1485                         else
1486                                 GMStatus[i].dcd = 0;
1487
1488                         if (status & 0x20 /*UART_MSR_DSR */ )
1489                                 GMStatus[i].dsr = 1;
1490                         else
1491                                 GMStatus[i].dsr = 0;
1492
1493
1494                         if (status & 0x10 /*UART_MSR_CTS */ )
1495                                 GMStatus[i].cts = 1;
1496                         else
1497                                 GMStatus[i].cts = 0;
1498                 }
1499                 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1500                         return -EFAULT;
1501                 return 0;
1502         case MOXA_ASPP_MON_EXT:{
1503                         int status;
1504                         int opmode, p;
1505                         int shiftbit;
1506                         unsigned cflag, iflag;
1507
1508                         for (i = 0; i < MXSER_PORTS; i++) {
1509
1510                                 if (!mxvar_table[i].base)
1511                                         continue;
1512
1513                                 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1514 //                      mxser_check_modem_status(&mxvar_table[i], status);
1515                                 if (status & UART_MSR_TERI)
1516                                         mxvar_table[i].icount.rng++;
1517                                 if (status & UART_MSR_DDSR)
1518                                         mxvar_table[i].icount.dsr++;
1519                                 if (status & UART_MSR_DDCD)
1520                                         mxvar_table[i].icount.dcd++;
1521                                 if (status & UART_MSR_DCTS)
1522                                         mxvar_table[i].icount.cts++;
1523
1524                                 mxvar_table[i].mon_data.modem_status = status;
1525                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1526                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1527                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1528                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1529                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1530                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1531
1532                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1533                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1534                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1535                                 } else {
1536                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1537                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1538                                 }
1539
1540                                 mon_data_ext.databits[i] = cflag & CSIZE;
1541
1542                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1543
1544                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1545
1546                                 mon_data_ext.flowctrl[i] = 0x00;
1547
1548                                 if (cflag & CRTSCTS)
1549                                         mon_data_ext.flowctrl[i] |= 0x03;
1550
1551                                 if (iflag & (IXON | IXOFF))
1552                                         mon_data_ext.flowctrl[i] |= 0x0C;
1553
1554                                 if (mxvar_table[i].type == PORT_16550A)
1555                                         mon_data_ext.fifo[i] = 1;
1556                                 else
1557                                         mon_data_ext.fifo[i] = 0;
1558
1559                                 p = i % 4;
1560                                 shiftbit = p * 2;
1561                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1562                                 opmode &= OP_MODE_MASK;
1563
1564                                 mon_data_ext.iftype[i] = opmode;
1565
1566                         }
1567                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1568                                 return -EFAULT;
1569
1570                         return 0;
1571
1572                 }
1573         default:
1574                 return -ENOIOCTLCMD;
1575         }
1576         return 0;
1577 }
1578
1579
1580 static void mxser_stoprx(struct tty_struct *tty)
1581 {
1582         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1583         //unsigned long flags;
1584
1585
1586         info->ldisc_stop_rx = 1;
1587         if (I_IXOFF(tty)) {
1588
1589                 //MX_LOCK(&info->slock);
1590                 // following add by Victor Yu. 09-02-2002
1591                 if (info->IsMoxaMustChipFlag) {
1592                         info->IER &= ~MOXA_MUST_RECV_ISR;
1593                         outb(info->IER, info->base + UART_IER);
1594                 } else {
1595                         // above add by Victor Yu. 09-02-2002
1596
1597                         info->x_char = STOP_CHAR(tty);
1598                         //      outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1599                         outb(0, info->base + UART_IER);
1600                         info->IER |= UART_IER_THRI;
1601                         outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1602                 }               // add by Victor Yu. 09-02-2002
1603                 //MX_UNLOCK(&info->slock);
1604         }
1605
1606         if (info->tty->termios->c_cflag & CRTSCTS) {
1607                 //MX_LOCK(&info->slock);
1608                 info->MCR &= ~UART_MCR_RTS;
1609                 outb(info->MCR, info->base + UART_MCR);
1610                 //MX_UNLOCK(&info->slock);
1611         }
1612 }
1613
1614 static void mxser_startrx(struct tty_struct *tty)
1615 {
1616         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1617         //unsigned long flags;
1618
1619         info->ldisc_stop_rx = 0;
1620         if (I_IXOFF(tty)) {
1621                 if (info->x_char)
1622                         info->x_char = 0;
1623                 else {
1624                         //MX_LOCK(&info->slock);
1625
1626                         // following add by Victor Yu. 09-02-2002
1627                         if (info->IsMoxaMustChipFlag) {
1628                                 info->IER |= MOXA_MUST_RECV_ISR;
1629                                 outb(info->IER, info->base + UART_IER);
1630                         } else {
1631                                 // above add by Victor Yu. 09-02-2002
1632
1633                                 info->x_char = START_CHAR(tty);
1634                                 //          outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1635                                 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1636                                 info->IER |= UART_IER_THRI;     /* force Tx interrupt */
1637                                 outb(info->IER, info->base + UART_IER);
1638                         }       // add by Victor Yu. 09-02-2002
1639                         //MX_UNLOCK(&info->slock);
1640                 }
1641         }
1642
1643         if (info->tty->termios->c_cflag & CRTSCTS) {
1644                 //MX_LOCK(&info->slock);
1645                 info->MCR |= UART_MCR_RTS;
1646                 outb(info->MCR, info->base + UART_MCR);
1647                 //MX_UNLOCK(&info->slock);
1648         }
1649 }
1650
1651 /*
1652  * This routine is called by the upper-layer tty layer to signal that
1653  * incoming characters should be throttled.
1654  */
1655 static void mxser_throttle(struct tty_struct *tty)
1656 {
1657         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1658         //unsigned long flags;
1659         //MX_LOCK(&info->slock);
1660         mxser_stoprx(tty);
1661         //MX_UNLOCK(&info->slock);
1662 }
1663
1664 static void mxser_unthrottle(struct tty_struct *tty)
1665 {
1666         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1667         //unsigned long flags;
1668         //MX_LOCK(&info->slock);
1669         mxser_startrx(tty);
1670         //MX_UNLOCK(&info->slock);
1671 }
1672
1673 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1674 {
1675         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1676         unsigned long flags;
1677
1678         if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1679
1680                 mxser_change_speed(info, old_termios);
1681
1682                 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1683                         tty->hw_stopped = 0;
1684                         mxser_start(tty);
1685                 }
1686         }
1687
1688 /* Handle sw stopped */
1689         if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1690                 tty->stopped = 0;
1691
1692                 // following add by Victor Yu. 09-02-2002
1693                 if (info->IsMoxaMustChipFlag) {
1694                         spin_lock_irqsave(&info->slock, flags);
1695                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1696                         spin_unlock_irqrestore(&info->slock, flags);
1697                 }
1698                 // above add by Victor Yu. 09-02-2002
1699
1700                 mxser_start(tty);
1701         }
1702 }
1703
1704 /*
1705  * mxser_stop() and mxser_start()
1706  *
1707  * This routines are called before setting or resetting tty->stopped.
1708  * They enable or disable transmitter interrupts, as necessary.
1709  */
1710 static void mxser_stop(struct tty_struct *tty)
1711 {
1712         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1713         unsigned long flags;
1714
1715         spin_lock_irqsave(&info->slock, flags);
1716         if (info->IER & UART_IER_THRI) {
1717                 info->IER &= ~UART_IER_THRI;
1718                 outb(info->IER, info->base + UART_IER);
1719         }
1720         spin_unlock_irqrestore(&info->slock, flags);
1721 }
1722
1723 static void mxser_start(struct tty_struct *tty)
1724 {
1725         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1726         unsigned long flags;
1727
1728         spin_lock_irqsave(&info->slock, flags);
1729         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1730                 info->IER |= UART_IER_THRI;
1731                 outb(info->IER, info->base + UART_IER);
1732         }
1733         spin_unlock_irqrestore(&info->slock, flags);
1734 }
1735
1736 /*
1737  * mxser_wait_until_sent() --- wait until the transmitter is empty
1738  */
1739 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1740 {
1741         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1742         unsigned long orig_jiffies, char_time;
1743         int lsr;
1744
1745         if (info->type == PORT_UNKNOWN)
1746                 return;
1747
1748         if (info->xmit_fifo_size == 0)
1749                 return;         /* Just in case.... */
1750
1751         orig_jiffies = jiffies;
1752         /*
1753          * Set the check interval to be 1/5 of the estimated time to
1754          * send a single character, and make it at least 1.  The check
1755          * interval should also be less than the timeout.
1756          *
1757          * Note: we have to use pretty tight timings here to satisfy
1758          * the NIST-PCTS.
1759          */
1760         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1761         char_time = char_time / 5;
1762         if (char_time == 0)
1763                 char_time = 1;
1764         if (timeout && timeout < char_time)
1765                 char_time = timeout;
1766         /*
1767          * If the transmitter hasn't cleared in twice the approximate
1768          * amount of time to send the entire FIFO, it probably won't
1769          * ever clear.  This assumes the UART isn't doing flow
1770          * control, which is currently the case.  Hence, if it ever
1771          * takes longer than info->timeout, this is probably due to a
1772          * UART bug of some kind.  So, we clamp the timeout parameter at
1773          * 2*info->timeout.
1774          */
1775         if (!timeout || timeout > 2 * info->timeout)
1776                 timeout = 2 * info->timeout;
1777 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1778         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1779         printk("jiff=%lu...", jiffies);
1780 #endif
1781         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1782 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1783                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1784 #endif
1785                 schedule_timeout_interruptible(char_time);
1786                 if (signal_pending(current))
1787                         break;
1788                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1789                         break;
1790         }
1791         set_current_state(TASK_RUNNING);
1792
1793 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1794         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1795 #endif
1796 }
1797
1798
1799 /*
1800  * This routine is called by tty_hangup() when a hangup is signaled.
1801  */
1802 void mxser_hangup(struct tty_struct *tty)
1803 {
1804         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1805
1806         mxser_flush_buffer(tty);
1807         mxser_shutdown(info);
1808         info->event = 0;
1809         info->count = 0;
1810         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1811         info->tty = NULL;
1812         wake_up_interruptible(&info->open_wait);
1813 }
1814
1815
1816 // added by James 03-12-2004.
1817 /*
1818  * mxser_rs_break() --- routine which turns the break handling on or off
1819  */
1820 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1821 {
1822         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1823         unsigned long flags;
1824
1825         spin_lock_irqsave(&info->slock, flags);
1826         if (break_state == -1)
1827                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1828         else
1829                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1830         spin_unlock_irqrestore(&info->slock, flags);
1831 }
1832
1833 // (above) added by James.
1834
1835
1836 /*
1837  * This is the serial driver's generic interrupt routine
1838  */
1839 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1840 {
1841         int status, iir, i;
1842         struct mxser_struct *info;
1843         struct mxser_struct *port;
1844         int max, irqbits, bits, msr;
1845         int pass_counter = 0;
1846         int handled = IRQ_NONE;
1847
1848         port = NULL;
1849         //spin_lock(&gm_lock);
1850
1851         for (i = 0; i < MXSER_BOARDS; i++) {
1852                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1853                         port = dev_id;
1854                         break;
1855                 }
1856         }
1857
1858         if (i == MXSER_BOARDS) {
1859                 goto irq_stop;
1860         }
1861         if (port == 0) {
1862                 goto irq_stop;
1863         }
1864         max = mxser_numports[mxsercfg[i].board_type - 1];
1865         while (1) {
1866                 irqbits = inb(port->vector) & port->vectormask;
1867                 if (irqbits == port->vectormask) {
1868                         break;
1869                 }
1870
1871                 handled = IRQ_HANDLED;
1872                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1873                         if (irqbits == port->vectormask) {
1874                                 break;
1875                         }
1876                         if (bits & irqbits)
1877                                 continue;
1878                         info = port + i;
1879
1880                         // following add by Victor Yu. 09-13-2002
1881                         iir = inb(info->base + UART_IIR);
1882                         if (iir & UART_IIR_NO_INT)
1883                                 continue;
1884                         iir &= MOXA_MUST_IIR_MASK;
1885                         if (!info->tty) {
1886                                 status = inb(info->base + UART_LSR);
1887                                 outb(0x27, info->base + UART_FCR);
1888                                 inb(info->base + UART_MSR);
1889                                 continue;
1890                         }
1891                         // above add by Victor Yu. 09-13-2002
1892                         /*
1893                            if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1894                            info->IER |= MOXA_MUST_RECV_ISR;
1895                            outb(info->IER, info->base + UART_IER);
1896                            }
1897                          */
1898
1899
1900                         /* mask by Victor Yu. 09-13-2002
1901                            if ( !info->tty ||
1902                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1903                            continue;
1904                          */
1905                         /* mask by Victor Yu. 09-02-2002
1906                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1907                          */
1908
1909                         // following add by Victor Yu. 09-02-2002
1910                         status = inb(info->base + UART_LSR);
1911
1912                         if (status & UART_LSR_PE) {
1913                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1914                         }
1915                         if (status & UART_LSR_FE) {
1916                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1917                         }
1918                         if (status & UART_LSR_OE) {
1919                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1920                         }
1921                         if (status & UART_LSR_BI)
1922                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
1923
1924                         if (info->IsMoxaMustChipFlag) {
1925                                 /*
1926                                    if ( (status & 0x02) && !(status & 0x01) ) {
1927                                    outb(info->base+UART_FCR,  0x23);
1928                                    continue;
1929                                    }
1930                                  */
1931                                 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1932                                         mxser_receive_chars(info, &status);
1933
1934                         } else {
1935                                 // above add by Victor Yu. 09-02-2002
1936
1937                                 status &= info->read_status_mask;
1938                                 if (status & UART_LSR_DR)
1939                                         mxser_receive_chars(info, &status);
1940                         }
1941                         msr = inb(info->base + UART_MSR);
1942                         if (msr & UART_MSR_ANY_DELTA) {
1943                                 mxser_check_modem_status(info, msr);
1944                         }
1945                         // following add by Victor Yu. 09-13-2002
1946                         if (info->IsMoxaMustChipFlag) {
1947                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1948                                         mxser_transmit_chars(info);
1949                                 }
1950                         } else {
1951                                 // above add by Victor Yu. 09-13-2002
1952
1953                                 if (status & UART_LSR_THRE) {
1954 /* 8-2-99 by William
1955                             if ( info->x_char || (info->xmit_cnt > 0) )
1956 */
1957                                         mxser_transmit_chars(info);
1958                                 }
1959                         }
1960                 }
1961                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1962                         break;  /* Prevent infinite loops */
1963                 }
1964         }
1965
1966       irq_stop:
1967         //spin_unlock(&gm_lock);
1968         return handled;
1969 }
1970
1971 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1972 {
1973         struct tty_struct *tty = info->tty;
1974         unsigned char ch, gdl;
1975         int ignored = 0;
1976         int cnt = 0;
1977         int recv_room;
1978         int max = 256;
1979         unsigned long flags;
1980
1981         spin_lock_irqsave(&info->slock, flags);
1982
1983         recv_room = tty->ldisc.receive_room(tty);
1984         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
1985                 //mxser_throttle(tty);
1986                 mxser_stoprx(tty);
1987                 //return;
1988         }
1989
1990         // following add by Victor Yu. 09-02-2002
1991         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
1992
1993                 if (*status & UART_LSR_SPECIAL) {
1994                         goto intr_old;
1995                 }
1996                 // following add by Victor Yu. 02-11-2004
1997                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
1998                         goto intr_old;
1999                 // above add by Victor Yu. 02-14-2004
2000                 if (*status & MOXA_MUST_LSR_RERR)
2001                         goto intr_old;
2002
2003                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2004
2005                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)   // add by Victor Yu. 02-11-2004
2006                         gdl &= MOXA_MUST_GDL_MASK;
2007                 if (gdl >= recv_room) {
2008                         if (!info->ldisc_stop_rx) {
2009                                 //mxser_throttle(tty);
2010                                 mxser_stoprx(tty);
2011                         }
2012                         //return;
2013                 }
2014                 while (gdl--) {
2015                         ch = inb(info->base + UART_RX);
2016                         tty_insert_flip_char(tty, ch, 0);
2017                         cnt++;
2018                         /*
2019                            if((cnt>=HI_WATER) && (info->stop_rx==0)){
2020                            mxser_stoprx(tty);
2021                            info->stop_rx=1;
2022                            break;
2023                            } */
2024                 }
2025                 goto end_intr;
2026         }
2027 intr_old:
2028         // above add by Victor Yu. 09-02-2002
2029
2030         do {
2031                 if (max-- < 0)
2032                         break;
2033                 /*
2034                    if((cnt>=HI_WATER) && (info->stop_rx==0)){
2035                    mxser_stoprx(tty);
2036                    info->stop_rx=1;
2037                    break;
2038                    }
2039                  */
2040
2041                 ch = inb(info->base + UART_RX);
2042                 // following add by Victor Yu. 09-02-2002
2043                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2044                         outb(0x23, info->base + UART_FCR);
2045                 *status &= info->read_status_mask;
2046                 // above add by Victor Yu. 09-02-2002
2047                 if (*status & info->ignore_status_mask) {
2048                         if (++ignored > 100)
2049                                 break;
2050                 } else {
2051                         char flag = 0;
2052                         if (*status & UART_LSR_SPECIAL) {
2053                                 if (*status & UART_LSR_BI) {
2054                                         flag = TTY_BREAK;
2055 /* added by casper 1/11/2000 */
2056                                         info->icount.brk++;
2057 /* */
2058                                         if (info->flags & ASYNC_SAK)
2059                                                 do_SAK(tty);
2060                                 } else if (*status & UART_LSR_PE) {
2061                                         flag = TTY_PARITY;
2062 /* added by casper 1/11/2000 */
2063                                         info->icount.parity++;
2064 /* */
2065                                 } else if (*status & UART_LSR_FE) {
2066                                         flag = TTY_FRAME;
2067 /* added by casper 1/11/2000 */
2068                                         info->icount.frame++;
2069 /* */
2070                                 } else if (*status & UART_LSR_OE) {
2071                                         flag = TTY_OVERRUN;
2072 /* added by casper 1/11/2000 */
2073                                         info->icount.overrun++;
2074 /* */
2075                                 }
2076                         }
2077                         tty_insert_flip_char(tty, ch, flag);
2078                         cnt++;
2079                         if (cnt >= recv_room) {
2080                                 if (!info->ldisc_stop_rx) {
2081                                         //mxser_throttle(tty);
2082                                         mxser_stoprx(tty);
2083                                 }
2084                                 break;
2085                         }
2086
2087                 }
2088
2089                 // following add by Victor Yu. 09-02-2002
2090                 if (info->IsMoxaMustChipFlag)
2091                         break;
2092                 // above add by Victor Yu. 09-02-2002
2093
2094                 /* mask by Victor Yu. 09-02-2002
2095                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2096                  */
2097                 // following add by Victor Yu. 09-02-2002
2098                 *status = inb(info->base + UART_LSR);
2099                 // above add by Victor Yu. 09-02-2002
2100         } while (*status & UART_LSR_DR);
2101
2102 end_intr:               // add by Victor Yu. 09-02-2002
2103
2104         mxvar_log.rxcnt[info->port] += cnt;
2105         info->mon_data.rxcnt += cnt;
2106         info->mon_data.up_rxcnt += cnt;
2107         spin_unlock_irqrestore(&info->slock, flags);
2108
2109         tty_flip_buffer_push(tty);
2110 }
2111
2112 static void mxser_transmit_chars(struct mxser_struct *info)
2113 {
2114         int count, cnt;
2115         unsigned long flags;
2116
2117         spin_lock_irqsave(&info->slock, flags);
2118
2119         if (info->x_char) {
2120                 outb(info->x_char, info->base + UART_TX);
2121                 info->x_char = 0;
2122                 mxvar_log.txcnt[info->port]++;
2123                 info->mon_data.txcnt++;
2124                 info->mon_data.up_txcnt++;
2125
2126 /* added by casper 1/11/2000 */
2127                 info->icount.tx++;
2128 /* */
2129                 spin_unlock_irqrestore(&info->slock, flags);
2130                 return;
2131         }
2132
2133         if (info->xmit_buf == 0) {
2134                 spin_unlock_irqrestore(&info->slock, flags);
2135                 return;
2136         }
2137
2138         if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2139                 info->IER &= ~UART_IER_THRI;
2140                 outb(info->IER, info->base + UART_IER);
2141                 spin_unlock_irqrestore(&info->slock, flags);
2142                 return;
2143         }
2144
2145         cnt = info->xmit_cnt;
2146         count = info->xmit_fifo_size;
2147         do {
2148                 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2149                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2150                 if (--info->xmit_cnt <= 0)
2151                         break;
2152         } while (--count > 0);
2153         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2154
2155 // added by James 03-12-2004.
2156         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2157         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2158 // (above) added by James.
2159
2160 /* added by casper 1/11/2000 */
2161         info->icount.tx += (cnt - info->xmit_cnt);
2162 /* */
2163
2164         if (info->xmit_cnt < WAKEUP_CHARS) {
2165                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2166                 schedule_work(&info->tqueue);
2167         }
2168         if (info->xmit_cnt <= 0) {
2169                 info->IER &= ~UART_IER_THRI;
2170                 outb(info->IER, info->base + UART_IER);
2171         }
2172         spin_unlock_irqrestore(&info->slock, flags);
2173 }
2174
2175 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2176 {
2177         /* update input line counters */
2178         if (status & UART_MSR_TERI)
2179                 info->icount.rng++;
2180         if (status & UART_MSR_DDSR)
2181                 info->icount.dsr++;
2182         if (status & UART_MSR_DDCD)
2183                 info->icount.dcd++;
2184         if (status & UART_MSR_DCTS)
2185                 info->icount.cts++;
2186         info->mon_data.modem_status = status;
2187         wake_up_interruptible(&info->delta_msr_wait);
2188
2189
2190         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2191                 if (status & UART_MSR_DCD)
2192                         wake_up_interruptible(&info->open_wait);
2193                 schedule_work(&info->tqueue);
2194         }
2195
2196         if (info->flags & ASYNC_CTS_FLOW) {
2197                 if (info->tty->hw_stopped) {
2198                         if (status & UART_MSR_CTS) {
2199                                 info->tty->hw_stopped = 0;
2200
2201                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2202                                         info->IER |= UART_IER_THRI;
2203                                         outb(info->IER, info->base + UART_IER);
2204                                 }
2205                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2206                                 schedule_work(&info->tqueue);                   }
2207                 } else {
2208                         if (!(status & UART_MSR_CTS)) {
2209                                 info->tty->hw_stopped = 1;
2210                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2211                                         info->IER &= ~UART_IER_THRI;
2212                                         outb(info->IER, info->base + UART_IER);
2213                                 }
2214                         }
2215                 }
2216         }
2217 }
2218
2219 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2220 {
2221         DECLARE_WAITQUEUE(wait, current);
2222         int retval;
2223         int do_clocal = 0;
2224         unsigned long flags;
2225
2226         /*
2227          * If non-blocking mode is set, or the port is not enabled,
2228          * then make the check up front and then exit.
2229          */
2230         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2231                 info->flags |= ASYNC_NORMAL_ACTIVE;
2232                 return (0);
2233         }
2234
2235         if (tty->termios->c_cflag & CLOCAL)
2236                 do_clocal = 1;
2237
2238         /*
2239          * Block waiting for the carrier detect and the line to become
2240          * free (i.e., not in use by the callout).  While we are in
2241          * this loop, info->count is dropped by one, so that
2242          * mxser_close() knows when to free things.  We restore it upon
2243          * exit, either normal or abnormal.
2244          */
2245         retval = 0;
2246         add_wait_queue(&info->open_wait, &wait);
2247
2248         spin_lock_irqsave(&info->slock, flags);
2249         if (!tty_hung_up_p(filp))
2250                 info->count--;
2251         spin_unlock_irqrestore(&info->slock, flags);
2252         info->blocked_open++;
2253         while (1) {
2254                 spin_lock_irqsave(&info->slock, flags);
2255                 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2256                 spin_unlock_irqrestore(&info->slock, flags);
2257                 set_current_state(TASK_INTERRUPTIBLE);
2258                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2259                         if (info->flags & ASYNC_HUP_NOTIFY)
2260                                 retval = -EAGAIN;
2261                         else
2262                                 retval = -ERESTARTSYS;
2263                         break;
2264                 }
2265                 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2266                         break;
2267                 if (signal_pending(current)) {
2268                         retval = -ERESTARTSYS;
2269                         break;
2270                 }
2271                 schedule();
2272         }
2273         set_current_state(TASK_RUNNING);
2274         remove_wait_queue(&info->open_wait, &wait);
2275         if (!tty_hung_up_p(filp))
2276                 info->count++;
2277         info->blocked_open--;
2278         if (retval)
2279                 return (retval);
2280         info->flags |= ASYNC_NORMAL_ACTIVE;
2281         return (0);
2282 }
2283
2284 static int mxser_startup(struct mxser_struct *info)
2285 {
2286
2287         unsigned long page;
2288         unsigned long flags;
2289
2290         page = __get_free_page(GFP_KERNEL);
2291         if (!page)
2292                 return (-ENOMEM);
2293
2294         spin_lock_irqsave(&info->slock, flags);
2295
2296         if (info->flags & ASYNC_INITIALIZED) {
2297                 free_page(page);
2298                 spin_unlock_irqrestore(&info->slock, flags);
2299                 return (0);
2300         }
2301
2302         if (!info->base || !info->type) {
2303                 if (info->tty)
2304                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2305                 free_page(page);
2306                 spin_unlock_irqrestore(&info->slock, flags);
2307                 return (0);
2308         }
2309         if (info->xmit_buf)
2310                 free_page(page);
2311         else
2312                 info->xmit_buf = (unsigned char *) page;
2313
2314         /*
2315          * Clear the FIFO buffers and disable them
2316          * (they will be reenabled in mxser_change_speed())
2317          */
2318         if (info->IsMoxaMustChipFlag)
2319                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2320         else
2321                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2322
2323         /*
2324          * At this point there's no way the LSR could still be 0xFF;
2325          * if it is, then bail out, because there's likely no UART
2326          * here.
2327          */
2328         if (inb(info->base + UART_LSR) == 0xff) {
2329                 spin_unlock_irqrestore(&info->slock, flags);
2330                 if (capable(CAP_SYS_ADMIN)) {
2331                         if (info->tty)
2332                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2333                         return (0);
2334                 } else
2335                         return (-ENODEV);
2336         }
2337
2338         /*
2339          * Clear the interrupt registers.
2340          */
2341         (void) inb(info->base + UART_LSR);
2342         (void) inb(info->base + UART_RX);
2343         (void) inb(info->base + UART_IIR);
2344         (void) inb(info->base + UART_MSR);
2345
2346         /*
2347          * Now, initialize the UART
2348          */
2349         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2350         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2351         outb(info->MCR, info->base + UART_MCR);
2352
2353         /*
2354          * Finally, enable interrupts
2355          */
2356         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2357 //      info->IER = UART_IER_RLSI | UART_IER_RDI;
2358
2359         // following add by Victor Yu. 08-30-2002
2360         if (info->IsMoxaMustChipFlag)
2361                 info->IER |= MOXA_MUST_IER_EGDAI;
2362         // above add by Victor Yu. 08-30-2002
2363         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2364
2365         /*
2366          * And clear the interrupt registers again for luck.
2367          */
2368         (void) inb(info->base + UART_LSR);
2369         (void) inb(info->base + UART_RX);
2370         (void) inb(info->base + UART_IIR);
2371         (void) inb(info->base + UART_MSR);
2372
2373         if (info->tty)
2374                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2375         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2376
2377         /*
2378          * and set the speed of the serial port
2379          */
2380         spin_unlock_irqrestore(&info->slock, flags);
2381         mxser_change_speed(info, NULL);
2382
2383         info->flags |= ASYNC_INITIALIZED;
2384         return (0);
2385 }
2386
2387 /*
2388  * This routine will shutdown a serial port; interrupts maybe disabled, and
2389  * DTR is dropped if the hangup on close termio flag is on.
2390  */
2391 static void mxser_shutdown(struct mxser_struct *info)
2392 {
2393         unsigned long flags;
2394
2395         if (!(info->flags & ASYNC_INITIALIZED))
2396                 return;
2397
2398         spin_lock_irqsave(&info->slock, flags);
2399
2400         /*
2401          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2402          * here so the queue might never be waken up
2403          */
2404         wake_up_interruptible(&info->delta_msr_wait);
2405
2406         /*
2407          * Free the IRQ, if necessary
2408          */
2409         if (info->xmit_buf) {
2410                 free_page((unsigned long) info->xmit_buf);
2411                 info->xmit_buf = NULL;
2412         }
2413
2414         info->IER = 0;
2415         outb(0x00, info->base + UART_IER);
2416
2417         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2418                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2419         outb(info->MCR, info->base + UART_MCR);
2420
2421         /* clear Rx/Tx FIFO's */
2422         // following add by Victor Yu. 08-30-2002
2423         if (info->IsMoxaMustChipFlag)
2424                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2425         else
2426                 // above add by Victor Yu. 08-30-2002
2427                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2428
2429         /* read data port to reset things */
2430         (void) inb(info->base + UART_RX);
2431
2432         if (info->tty)
2433                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2434
2435         info->flags &= ~ASYNC_INITIALIZED;
2436
2437         // following add by Victor Yu. 09-23-2002
2438         if (info->IsMoxaMustChipFlag) {
2439                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2440         }
2441         // above add by Victor Yu. 09-23-2002
2442
2443         spin_unlock_irqrestore(&info->slock, flags);
2444 }
2445
2446 /*
2447  * This routine is called to set the UART divisor registers to match
2448  * the specified baud rate for a serial port.
2449  */
2450 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2451 {
2452         unsigned cflag, cval, fcr;
2453         int ret = 0;
2454         unsigned char status;
2455         long baud;
2456         unsigned long flags;
2457
2458
2459         if (!info->tty || !info->tty->termios)
2460                 return ret;
2461         cflag = info->tty->termios->c_cflag;
2462         if (!(info->base))
2463                 return ret;
2464
2465
2466 #ifndef B921600
2467 #define B921600 (B460800 +1)
2468 #endif
2469         if (mxser_set_baud_method[info->port] == 0) {
2470                 switch (cflag & (CBAUD | CBAUDEX)) {
2471                 case B921600:
2472                         baud = 921600;
2473                         break;
2474                 case B460800:
2475                         baud = 460800;
2476                         break;
2477                 case B230400:
2478                         baud = 230400;
2479                         break;
2480                 case B115200:
2481                         baud = 115200;
2482                         break;
2483                 case B57600:
2484                         baud = 57600;
2485                         break;
2486                 case B38400:
2487                         baud = 38400;
2488                         break;
2489                 case B19200:
2490                         baud = 19200;
2491                         break;
2492                 case B9600:
2493                         baud = 9600;
2494                         break;
2495                 case B4800:
2496                         baud = 4800;
2497                         break;
2498                 case B2400:
2499                         baud = 2400;
2500                         break;
2501                 case B1800:
2502                         baud = 1800;
2503                         break;
2504                 case B1200:
2505                         baud = 1200;
2506                         break;
2507                 case B600:
2508                         baud = 600;
2509                         break;
2510                 case B300:
2511                         baud = 300;
2512                         break;
2513                 case B200:
2514                         baud = 200;
2515                         break;
2516                 case B150:
2517                         baud = 150;
2518                         break;
2519                 case B134:
2520                         baud = 134;
2521                         break;
2522                 case B110:
2523                         baud = 110;
2524                         break;
2525                 case B75:
2526                         baud = 75;
2527                         break;
2528                 case B50:
2529                         baud = 50;
2530                         break;
2531                 default:
2532                         baud = 0;
2533                         break;
2534                 }
2535                 mxser_set_baud(info, baud);
2536         }
2537
2538         /* byte size and parity */
2539         switch (cflag & CSIZE) {
2540         case CS5:
2541                 cval = 0x00;
2542                 break;
2543         case CS6:
2544                 cval = 0x01;
2545                 break;
2546         case CS7:
2547                 cval = 0x02;
2548                 break;
2549         case CS8:
2550                 cval = 0x03;
2551                 break;
2552         default:
2553                 cval = 0x00;
2554                 break;          /* too keep GCC shut... */
2555         }
2556         if (cflag & CSTOPB)
2557                 cval |= 0x04;
2558         if (cflag & PARENB)
2559                 cval |= UART_LCR_PARITY;
2560         if (!(cflag & PARODD)) {
2561                 cval |= UART_LCR_EPAR;
2562         }
2563         if (cflag & CMSPAR)
2564                 cval |= UART_LCR_SPAR;
2565
2566         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2567                 if (info->IsMoxaMustChipFlag) {
2568                         fcr = UART_FCR_ENABLE_FIFO;
2569                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2570                         SET_MOXA_MUST_FIFO_VALUE(info);
2571                 } else
2572                         fcr = 0;
2573         } else {
2574                 fcr = UART_FCR_ENABLE_FIFO;
2575                 // following add by Victor Yu. 08-30-2002
2576                 if (info->IsMoxaMustChipFlag) {
2577                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2578                         SET_MOXA_MUST_FIFO_VALUE(info);
2579                 } else {
2580                         // above add by Victor Yu. 08-30-2002
2581
2582                         switch (info->rx_trigger) {
2583                         case 1:
2584                                 fcr |= UART_FCR_TRIGGER_1;
2585                                 break;
2586                         case 4:
2587                                 fcr |= UART_FCR_TRIGGER_4;
2588                                 break;
2589                         case 8:
2590                                 fcr |= UART_FCR_TRIGGER_8;
2591                                 break;
2592                         default:
2593                                 fcr |= UART_FCR_TRIGGER_14;
2594                                 break;
2595                         }
2596                 }
2597         }
2598
2599         /* CTS flow control flag and modem status interrupts */
2600         info->IER &= ~UART_IER_MSI;
2601         info->MCR &= ~UART_MCR_AFE;
2602         if (cflag & CRTSCTS) {
2603                 info->flags |= ASYNC_CTS_FLOW;
2604                 info->IER |= UART_IER_MSI;
2605                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2606                         info->MCR |= UART_MCR_AFE;
2607                         //status = mxser_get_msr(info->base, 0, info->port);
2608 /*      save_flags(flags);
2609         cli();
2610         status = inb(baseaddr + UART_MSR);
2611         restore_flags(flags);*/
2612                         //mxser_check_modem_status(info, status);
2613                 } else {
2614                         //status = mxser_get_msr(info->base, 0, info->port);
2615
2616                         //MX_LOCK(&info->slock);
2617                         status = inb(info->base + UART_MSR);
2618                         //MX_UNLOCK(&info->slock);
2619                         if (info->tty->hw_stopped) {
2620                                 if (status & UART_MSR_CTS) {
2621                                         info->tty->hw_stopped = 0;
2622                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2623                                                 info->IER |= UART_IER_THRI;
2624                                                 outb(info->IER, info->base + UART_IER);
2625                                         }
2626                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2627                                         schedule_work(&info->tqueue);                           }
2628                         } else {
2629                                 if (!(status & UART_MSR_CTS)) {
2630                                         info->tty->hw_stopped = 1;
2631                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2632                                                 info->IER &= ~UART_IER_THRI;
2633                                                 outb(info->IER, info->base + UART_IER);
2634                                         }
2635                                 }
2636                         }
2637                 }
2638         } else {
2639                 info->flags &= ~ASYNC_CTS_FLOW;
2640         }
2641         outb(info->MCR, info->base + UART_MCR);
2642         if (cflag & CLOCAL) {
2643                 info->flags &= ~ASYNC_CHECK_CD;
2644         } else {
2645                 info->flags |= ASYNC_CHECK_CD;
2646                 info->IER |= UART_IER_MSI;
2647         }
2648         outb(info->IER, info->base + UART_IER);
2649
2650         /*
2651          * Set up parity check flag
2652          */
2653         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2654         if (I_INPCK(info->tty))
2655                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2656         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2657                 info->read_status_mask |= UART_LSR_BI;
2658
2659         info->ignore_status_mask = 0;
2660
2661         if (I_IGNBRK(info->tty)) {
2662                 info->ignore_status_mask |= UART_LSR_BI;
2663                 info->read_status_mask |= UART_LSR_BI;
2664                 /*
2665                  * If we're ignore parity and break indicators, ignore
2666                  * overruns too.  (For real raw support).
2667                  */
2668                 if (I_IGNPAR(info->tty)) {
2669                         info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2670                         info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2671                 }
2672         }
2673         // following add by Victor Yu. 09-02-2002
2674         if (info->IsMoxaMustChipFlag) {
2675                 spin_lock_irqsave(&info->slock, flags);
2676                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2677                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2678                 if (I_IXON(info->tty)) {
2679                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2680                 } else {
2681                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2682                 }
2683                 if (I_IXOFF(info->tty)) {
2684                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2685                 } else {
2686                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2687                 }
2688                 /*
2689                    if ( I_IXANY(info->tty) ) {
2690                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2691                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2692                    } else {
2693                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2694                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2695                    }
2696                  */
2697                 spin_unlock_irqrestore(&info->slock, flags);
2698         }
2699         // above add by Victor Yu. 09-02-2002
2700
2701
2702         outb(fcr, info->base + UART_FCR);       /* set fcr */
2703         outb(cval, info->base + UART_LCR);
2704
2705         return ret;
2706 }
2707
2708
2709 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2710 {
2711         int quot = 0;
2712         unsigned char cval;
2713         int ret = 0;
2714         unsigned long flags;
2715
2716         if (!info->tty || !info->tty->termios)
2717                 return ret;
2718
2719         if (!(info->base))
2720                 return ret;
2721
2722         if (newspd > info->MaxCanSetBaudRate)
2723                 return 0;
2724
2725         info->realbaud = newspd;
2726         if (newspd == 134) {
2727                 quot = (2 * info->baud_base / 269);
2728         } else if (newspd) {
2729                 quot = info->baud_base / newspd;
2730
2731                 if (quot == 0)
2732                         quot = 1;
2733
2734         } else {
2735                 quot = 0;
2736         }
2737
2738         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2739         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2740
2741         if (quot) {
2742                 spin_lock_irqsave(&info->slock, flags);
2743                 info->MCR |= UART_MCR_DTR;
2744                 outb(info->MCR, info->base + UART_MCR);
2745                 spin_unlock_irqrestore(&info->slock, flags);
2746         } else {
2747                 spin_lock_irqsave(&info->slock, flags);
2748                 info->MCR &= ~UART_MCR_DTR;
2749                 outb(info->MCR, info->base + UART_MCR);
2750                 spin_unlock_irqrestore(&info->slock, flags);
2751                 return ret;
2752         }
2753
2754         cval = inb(info->base + UART_LCR);
2755
2756         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2757
2758         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2759         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2760         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2761
2762
2763         return ret;
2764 }
2765
2766
2767
2768 /*
2769  * ------------------------------------------------------------
2770  * friends of mxser_ioctl()
2771  * ------------------------------------------------------------
2772  */
2773 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2774 {
2775         struct serial_struct tmp;
2776
2777         if (!retinfo)
2778                 return (-EFAULT);
2779         memset(&tmp, 0, sizeof(tmp));
2780         tmp.type = info->type;
2781         tmp.line = info->port;
2782         tmp.port = info->base;
2783         tmp.irq = info->irq;
2784         tmp.flags = info->flags;
2785         tmp.baud_base = info->baud_base;
2786         tmp.close_delay = info->close_delay;
2787         tmp.closing_wait = info->closing_wait;
2788         tmp.custom_divisor = info->custom_divisor;
2789         tmp.hub6 = 0;
2790         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2791                 return -EFAULT;
2792         return (0);
2793 }
2794
2795 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2796 {
2797         struct serial_struct new_serial;
2798         unsigned int flags;
2799         int retval = 0;
2800
2801         if (!new_info || !info->base)
2802                 return (-EFAULT);
2803         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2804                 return -EFAULT;
2805
2806         if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
2807                 return (-EPERM);
2808
2809         flags = info->flags & ASYNC_SPD_MASK;
2810
2811         if (!capable(CAP_SYS_ADMIN)) {
2812                 if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2813                         return (-EPERM);
2814                 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2815         } else {
2816                 /*
2817                  * OK, past this point, all the error checking has been done.
2818                  * At this point, we start making changes.....
2819                  */
2820                 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2821                 info->close_delay = new_serial.close_delay * HZ / 100;
2822                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2823                 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2824                 info->tty->low_latency = 0;     //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2825         }
2826
2827         /* added by casper, 3/17/2000, for mouse */
2828         info->type = new_serial.type;
2829
2830         process_txrx_fifo(info);
2831
2832         /* */
2833         if (info->flags & ASYNC_INITIALIZED) {
2834                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2835                         mxser_change_speed(info, NULL);
2836                 }
2837         } else {
2838                 retval = mxser_startup(info);
2839         }
2840         return (retval);
2841 }
2842
2843 /*
2844  * mxser_get_lsr_info - get line status register info
2845  *
2846  * Purpose: Let user call ioctl() to get info when the UART physically
2847  *          is emptied.  On bus types like RS485, the transmitter must
2848  *          release the bus after transmitting. This must be done when
2849  *          the transmit shift register is empty, not be done when the
2850  *          transmit holding register is empty.  This functionality
2851  *          allows an RS485 driver to be written in user space.
2852  */
2853 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2854 {
2855         unsigned char status;
2856         unsigned int result;
2857         unsigned long flags;
2858
2859         spin_lock_irqsave(&info->slock, flags);
2860         status = inb(info->base + UART_LSR);
2861         spin_unlock_irqrestore(&info->slock, flags);
2862         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2863         return put_user(result, value);
2864 }
2865
2866 /*
2867  * This routine sends a break character out the serial port.
2868  */
2869 static void mxser_send_break(struct mxser_struct *info, int duration)
2870 {
2871         unsigned long flags;
2872
2873         if (!info->base)
2874                 return;
2875         set_current_state(TASK_INTERRUPTIBLE);
2876         spin_lock_irqsave(&info->slock, flags);
2877         outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2878         spin_unlock_irqrestore(&info->slock, flags);
2879         schedule_timeout(duration);
2880         spin_lock_irqsave(&info->slock, flags);
2881         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2882         spin_unlock_irqrestore(&info->slock, flags);
2883 }
2884
2885 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2886 {
2887         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2888         unsigned char control, status;
2889         unsigned long flags;
2890
2891
2892         if (tty->index == MXSER_PORTS)
2893                 return (-ENOIOCTLCMD);
2894         if (tty->flags & (1 << TTY_IO_ERROR))
2895                 return (-EIO);
2896
2897         control = info->MCR;
2898
2899         spin_lock_irqsave(&info->slock, flags);
2900         status = inb(info->base + UART_MSR);
2901         if (status & UART_MSR_ANY_DELTA)
2902                 mxser_check_modem_status(info, status);
2903         spin_unlock_irqrestore(&info->slock, flags);
2904         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2905             ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2906 }
2907
2908 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2909 {
2910         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2911         unsigned long flags;
2912
2913
2914         if (tty->index == MXSER_PORTS)
2915                 return -ENOIOCTLCMD;
2916         if (tty->flags & (1 << TTY_IO_ERROR))
2917                 return -EIO;
2918
2919         spin_lock_irqsave(&info->slock, flags);
2920
2921         if (set & TIOCM_RTS)
2922                 info->MCR |= UART_MCR_RTS;
2923         if (set & TIOCM_DTR)
2924                 info->MCR |= UART_MCR_DTR;
2925
2926         if (clear & TIOCM_RTS)
2927                 info->MCR &= ~UART_MCR_RTS;
2928         if (clear & TIOCM_DTR)
2929                 info->MCR &= ~UART_MCR_DTR;
2930
2931         outb(info->MCR, info->base + UART_MCR);
2932         spin_unlock_irqrestore(&info->slock, flags);
2933         return 0;
2934 }
2935
2936
2937 static int mxser_read_register(int, unsigned short *);
2938 static int mxser_program_mode(int);
2939 static void mxser_normal_mode(int);
2940
2941 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2942 {
2943         int id, i, bits;
2944         unsigned short regs[16], irq;
2945         unsigned char scratch, scratch2;
2946
2947         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2948
2949         id = mxser_read_register(cap, regs);
2950         if (id == C168_ASIC_ID) {
2951                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2952                 hwconf->ports = 8;
2953         } else if (id == C104_ASIC_ID) {
2954                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2955                 hwconf->ports = 4;
2956         } else if (id == C102_ASIC_ID) {
2957                 hwconf->board_type = MXSER_BOARD_C102_ISA;
2958                 hwconf->ports = 2;
2959         } else if (id == CI132_ASIC_ID) {
2960                 hwconf->board_type = MXSER_BOARD_CI132;
2961                 hwconf->ports = 2;
2962         } else if (id == CI134_ASIC_ID) {
2963                 hwconf->board_type = MXSER_BOARD_CI134;
2964                 hwconf->ports = 4;
2965         } else if (id == CI104J_ASIC_ID) {
2966                 hwconf->board_type = MXSER_BOARD_CI104J;
2967                 hwconf->ports = 4;
2968         } else
2969                 return (0);
2970
2971         irq = 0;
2972         if (hwconf->ports == 2) {
2973                 irq = regs[9] & 0xF000;
2974                 irq = irq | (irq >> 4);
2975                 if (irq != (regs[9] & 0xFF00))
2976                         return (MXSER_ERR_IRQ_CONFLIT);
2977         } else if (hwconf->ports == 4) {
2978                 irq = regs[9] & 0xF000;
2979                 irq = irq | (irq >> 4);
2980                 irq = irq | (irq >> 8);
2981                 if (irq != regs[9])
2982                         return (MXSER_ERR_IRQ_CONFLIT);
2983         } else if (hwconf->ports == 8) {
2984                 irq = regs[9] & 0xF000;
2985                 irq = irq | (irq >> 4);
2986                 irq = irq | (irq >> 8);
2987                 if ((irq != regs[9]) || (irq != regs[10]))
2988                         return (MXSER_ERR_IRQ_CONFLIT);
2989         }
2990
2991         if (!irq) {
2992                 return (MXSER_ERR_IRQ);
2993         }
2994         hwconf->irq = ((int) (irq & 0xF000) >> 12);
2995         for (i = 0; i < 8; i++)
2996                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
2997         if ((regs[12] & 0x80) == 0) {
2998                 return (MXSER_ERR_VECTOR);
2999         }
3000         hwconf->vector = (int) regs[11];        /* interrupt vector */
3001         if (id == 1)
3002                 hwconf->vector_mask = 0x00FF;
3003         else
3004                 hwconf->vector_mask = 0x000F;
3005         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3006                 if (regs[12] & bits) {
3007                         hwconf->baud_base[i] = 921600;
3008                         hwconf->MaxCanSetBaudRate[i] = 921600;  // add by Victor Yu. 09-04-2002
3009                 } else {
3010                         hwconf->baud_base[i] = 115200;
3011                         hwconf->MaxCanSetBaudRate[i] = 115200;  // add by Victor Yu. 09-04-2002
3012                 }
3013         }
3014         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3015         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3016         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3017         outb(scratch2, cap + UART_LCR);
3018         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3019         scratch = inb(cap + UART_IIR);
3020
3021         if (scratch & 0xC0)
3022                 hwconf->uart_type = PORT_16550A;
3023         else
3024                 hwconf->uart_type = PORT_16450;
3025         if (id == 1)
3026                 hwconf->ports = 8;
3027         else
3028                 hwconf->ports = 4;
3029         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3030         request_region(hwconf->vector, 1, "mxser(vector)");
3031         return (hwconf->ports);
3032 }
3033
3034 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3035 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3036 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3037 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3038 #define EN_CCMD         0x000   /* Chip's command register     */
3039 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3040 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3041 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3042 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3043 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3044 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3045 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3046 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3047 static int mxser_read_register(int port, unsigned short *regs)
3048 {
3049         int i, k, value, id;
3050         unsigned int j;
3051
3052         id = mxser_program_mode(port);
3053         if (id < 0)
3054                 return (id);
3055         for (i = 0; i < 14; i++) {
3056                 k = (i & 0x3F) | 0x180;
3057                 for (j = 0x100; j > 0; j >>= 1) {
3058                         outb(CHIP_CS, port);
3059                         if (k & j) {
3060                                 outb(CHIP_CS | CHIP_DO, port);
3061                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3062                         } else {
3063                                 outb(CHIP_CS, port);
3064                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3065                         }
3066                 }
3067                 (void) inb(port);
3068                 value = 0;
3069                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3070                         outb(CHIP_CS, port);
3071                         outb(CHIP_CS | CHIP_SK, port);
3072                         if (inb(port) & CHIP_DI)
3073                                 value |= j;
3074                 }
3075                 regs[i] = value;
3076                 outb(0, port);
3077         }
3078         mxser_normal_mode(port);
3079         return (id);
3080 }
3081
3082 static int mxser_program_mode(int port)
3083 {
3084         int id, i, j, n;
3085         //unsigned long flags;
3086
3087         spin_lock(&gm_lock);
3088         outb(0, port);
3089         outb(0, port);
3090         outb(0, port);
3091         (void) inb(port);
3092         (void) inb(port);
3093         outb(0, port);
3094         (void) inb(port);
3095         //restore_flags(flags);
3096         spin_unlock(&gm_lock);
3097
3098         id = inb(port + 1) & 0x1F;
3099         if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID))
3100                 return (-1);
3101         for (i = 0, j = 0; i < 4; i++) {
3102                 n = inb(port + 2);
3103                 if (n == 'M') {
3104                         j = 1;
3105                 } else if ((j == 1) && (n == 1)) {
3106                         j = 2;
3107                         break;
3108                 } else
3109                         j = 0;
3110         }
3111         if (j != 2)
3112                 id = -2;
3113         return (id);
3114 }
3115
3116 static void mxser_normal_mode(int port)
3117 {
3118         int i, n;
3119
3120         outb(0xA5, port + 1);
3121         outb(0x80, port + 3);
3122         outb(12, port + 0);     /* 9600 bps */
3123         outb(0, port + 1);
3124         outb(0x03, port + 3);   /* 8 data bits */
3125         outb(0x13, port + 4);   /* loop back mode */
3126         for (i = 0; i < 16; i++) {
3127                 n = inb(port + 5);
3128                 if ((n & 0x61) == 0x60)
3129                         break;
3130                 if ((n & 1) == 1)
3131                         (void) inb(port);
3132         }
3133         outb(0x00, port + 4);
3134 }
3135
3136 module_init(mxser_module_init);
3137 module_exit(mxser_module_exit);