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/segment.h>
  67 #include <asm/bitops.h>
  68 #include <asm/uaccess.h>
  69
  70 #include "mxser.h"
  71
  72 #define MXSER_VERSION   "1.8"
  73 #define MXSERMAJOR       174
  74 #define MXSERCUMAJOR     175
  75
  76 #define MXSER_EVENT_TXLOW        1
  77 #define MXSER_EVENT_HANGUP       2
  78
  79 #define MXSER_BOARDS            4       /* Max. boards */
  80 #define MXSER_PORTS             32      /* Max. ports */
  81 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  82 #define MXSER_ISR_PASS_LIMIT    256
  83
  84 #define MXSER_ERR_IOADDR        -1
  85 #define MXSER_ERR_IRQ           -2
  86 #define MXSER_ERR_IRQ_CONFLIT   -3
  87 #define MXSER_ERR_VECTOR        -4
  88
  89 #define SERIAL_TYPE_NORMAL      1
  90 #define SERIAL_TYPE_CALLOUT     2
  91
  92 #define WAKEUP_CHARS            256
  93
  94 #define UART_MCR_AFE            0x20
  95 #define UART_LSR_SPECIAL        0x1E
  96
  97 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
  98
  99 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
 100
 101 #define C168_ASIC_ID    1
 102 #define C104_ASIC_ID    2
 103 #define C102_ASIC_ID    0xB
 104 #define CI132_ASIC_ID   4
 105 #define CI134_ASIC_ID   3
 106 #define CI104J_ASIC_ID  5
 107
 108 enum {
 109         MXSER_BOARD_C168_ISA = 1,
 110         MXSER_BOARD_C104_ISA,
 111         MXSER_BOARD_CI104J,
 112         MXSER_BOARD_C168_PCI,
 113         MXSER_BOARD_C104_PCI,
 114         MXSER_BOARD_C102_ISA,
 115         MXSER_BOARD_CI132,
 116         MXSER_BOARD_CI134,
 117         MXSER_BOARD_CP132,
 118         MXSER_BOARD_CP114,
 119         MXSER_BOARD_CT114,
 120         MXSER_BOARD_CP102,
 121         MXSER_BOARD_CP104U,
 122         MXSER_BOARD_CP168U,
 123         MXSER_BOARD_CP132U,
 124         MXSER_BOARD_CP134U,
 125         MXSER_BOARD_CP104JU,
 126         MXSER_BOARD_RC7000,
 127         MXSER_BOARD_CP118U,
 128         MXSER_BOARD_CP102UL,
 129         MXSER_BOARD_CP102U,
 130 };
 131
 132 static char *mxser_brdname[] = {
 133         "C168 series",
 134         "C104 series",
 135         "CI-104J series",
 136         "C168H/PCI series",
 137         "C104H/PCI series",
 138         "C102 series",
 139         "CI-132 series",
 140         "CI-134 series",
 141         "CP-132 series",
 142         "CP-114 series",
 143         "CT-114 series",
 144         "CP-102 series",
 145         "CP-104U series",
 146         "CP-168U series",
 147         "CP-132U series",
 148         "CP-134U series",
 149         "CP-104JU series",
 150         "Moxa UC7000 Serial",
 151         "CP-118U series",
 152         "CP-102UL series",
 153         "CP-102U series",
 154 };
 155
 156 static int mxser_numports[] = {
 157         8,                      // C168-ISA
 158         4,                      // C104-ISA
 159         4,                      // CI104J
 160         8,                      // C168-PCI
 161         4,                      // C104-PCI
 162         2,                      // C102-ISA
 163         2,                      // CI132
 164         4,                      // CI134
 165         2,                      // CP132
 166         4,                      // CP114
 167         4,                      // CT114
 168         2,                      // CP102
 169         4,                      // CP104U
 170         8,                      // CP168U
 171         2,                      // CP132U
 172         4,                      // CP134U
 173         4,                      // CP104JU
 174         8,                      // RC7000
 175         8,                      // CP118U
 176         2,                      // CP102UL
 177         2,                      // CP102U
 178 };
 179
 180 #define UART_TYPE_NUM   2
 181
 182 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 183         MOXA_MUST_MU150_HWID,
 184         MOXA_MUST_MU860_HWID
 185 };
 186
 187 // This is only for PCI
 188 #define UART_INFO_NUM   3
 189 struct mxpciuart_info {
 190         int type;
 191         int tx_fifo;
 192         int rx_fifo;
 193         int xmit_fifo_size;
 194         int rx_high_water;
 195         int rx_trigger;
 196         int rx_low_water;
 197         long max_baud;
 198 };
 199
 200 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 201         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 202         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 203         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 204 };
 205
 206
 207 #ifdef CONFIG_PCI
 208
 209 static struct pci_device_id mxser_pcibrds[] = {
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 222         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 223         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 224         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 225         {0}
 226 };
 227
 228 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 229
 230
 231 #endif
 232
 233 typedef struct _moxa_pci_info {
 234         unsigned short busNum;
 235         unsigned short devNum;
 236         struct pci_dev *pdev;   // add by Victor Yu. 06-23-2003
 237 } moxa_pci_info;
 238
 239 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 240 static int ttymajor = MXSERMAJOR;
 241 static int calloutmajor = MXSERCUMAJOR;
 242 static int verbose = 0;
 243
 244 /* Variables for insmod */
 245
 246 MODULE_AUTHOR("Casper Yang");
 247 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 248 MODULE_PARM(ioaddr, "1-4i");
 249 MODULE_PARM(ttymajor, "i");
 250 MODULE_PARM(calloutmajor, "i");
 251 MODULE_PARM(verbose, "i");
 252 MODULE_LICENSE("GPL");
 253
 254 struct mxser_log {
 255         int tick;
 256         unsigned long rxcnt[MXSER_PORTS];
 257         unsigned long txcnt[MXSER_PORTS];
 258 };
 259
 260
 261 struct mxser_mon {
 262         unsigned long rxcnt;
 263         unsigned long txcnt;
 264         unsigned long up_rxcnt;
 265         unsigned long up_txcnt;
 266         int modem_status;
 267         unsigned char hold_reason;
 268 };
 269
 270 struct mxser_mon_ext {
 271         unsigned long rx_cnt[32];
 272         unsigned long tx_cnt[32];
 273         unsigned long up_rxcnt[32];
 274         unsigned long up_txcnt[32];
 275         int modem_status[32];
 276
 277         long baudrate[32];
 278         int databits[32];
 279         int stopbits[32];
 280         int parity[32];
 281         int flowctrl[32];
 282         int fifo[32];
 283         int iftype[32];
 284 };
 285 struct mxser_hwconf {
 286         int board_type;
 287         int ports;
 288         int irq;
 289         int vector;
 290         int vector_mask;
 291         int uart_type;
 292         int ioaddr[MXSER_PORTS_PER_BOARD];
 293         int baud_base[MXSER_PORTS_PER_BOARD];
 294         moxa_pci_info pciInfo;
 295         int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
 296         int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];   // add by Victor Yu. 09-04-2002
 297         int opmode_ioaddr[MXSER_PORTS_PER_BOARD];       // add by Victor Yu. 01-05-2004
 298 };
 299
 300 struct mxser_struct {
 301         int port;
 302         int base;               /* port base address */
 303         int irq;                /* port using irq no. */
 304         int vector;             /* port irq vector */
 305         int vectormask;         /* port vector mask */
 306         int rx_high_water;
 307         int rx_trigger;         /* Rx fifo trigger level */
 308         int rx_low_water;
 309         int baud_base;          /* max. speed */
 310         int flags;              /* defined in tty.h */
 311         int type;               /* UART type */
 312         struct tty_struct *tty;
 313         int read_status_mask;
 314         int ignore_status_mask;
 315         int xmit_fifo_size;
 316         int custom_divisor;
 317         int x_char;             /* xon/xoff character */
 318         int close_delay;
 319         unsigned short closing_wait;
 320         int IER;                /* Interrupt Enable Register */
 321         int MCR;                /* Modem control register */
 322         unsigned long event;
 323         int count;              /* # of fd on device */
 324         int blocked_open;       /* # of blocked opens */
 325         long session;           /* Session of opening process */
 326         long pgrp;              /* pgrp of opening process */
 327         unsigned char *xmit_buf;
 328         int xmit_head;
 329         int xmit_tail;
 330         int xmit_cnt;
 331         struct work_struct tqueue;
 332         struct termios normal_termios;
 333         struct termios callout_termios;
 334         wait_queue_head_t open_wait;
 335         wait_queue_head_t close_wait;
 336         wait_queue_head_t delta_msr_wait;
 337         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 338         int timeout;
 339         int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
 340         int MaxCanSetBaudRate;  // add by Victor Yu. 09-04-2002
 341         int opmode_ioaddr;      // add by Victor Yu. 01-05-2004
 342         unsigned char stop_rx;
 343         unsigned char ldisc_stop_rx;
 344         long realbaud;
 345         struct mxser_mon mon_data;
 346         unsigned char err_shadow;
 347         spinlock_t slock;
 348 };
 349
 350
 351 struct mxser_mstatus {
 352         tcflag_t cflag;
 353         int cts;
 354         int dsr;
 355         int ri;
 356         int dcd;
 357 };
 358
 359 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 360
 361 static int mxserBoardCAP[MXSER_BOARDS] = {
 362         0, 0, 0, 0
 363             /*  0x180, 0x280, 0x200, 0x320   */
 364 };
 365
 366 static struct tty_driver *mxvar_sdriver;
 367 static struct mxser_struct mxvar_table[MXSER_PORTS];
 368 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 369 static struct termios *mxvar_termios[MXSER_PORTS + 1];
 370 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
 371 static struct mxser_log mxvar_log;
 372 static int mxvar_diagflag;
 373 static unsigned char mxser_msr[MXSER_PORTS + 1];
 374 static struct mxser_mon_ext mon_data_ext;
 375 static int mxser_set_baud_method[MXSER_PORTS + 1];
 376 static spinlock_t gm_lock;
 377
 378 /*
 379  * This is used to figure out the divisor speeds and the timeouts
 380  */
 381
 382 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 383
 384 /*
 385  * static functions:
 386  */
 387
 388 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 389 static int mxser_init(void);
 390
 391 //static void   mxser_poll(unsigned long);
 392 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 393 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 394 static void mxser_do_softint(void *);
 395 static int mxser_open(struct tty_struct *, struct file *);
 396 static void mxser_close(struct tty_struct *, struct file *);
 397 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 398 static int mxser_write_room(struct tty_struct *);
 399 static void mxser_flush_buffer(struct tty_struct *);
 400 static int mxser_chars_in_buffer(struct tty_struct *);
 401 static void mxser_flush_chars(struct tty_struct *);
 402 static void mxser_put_char(struct tty_struct *, unsigned char);
 403 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 404 static int mxser_ioctl_special(unsigned int, void __user *);
 405 static void mxser_throttle(struct tty_struct *);
 406 static void mxser_unthrottle(struct tty_struct *);
 407 static void mxser_set_termios(struct tty_struct *, struct termios *);
 408 static void mxser_stop(struct tty_struct *);
 409 static void mxser_start(struct tty_struct *);
 410 static void mxser_hangup(struct tty_struct *);
 411 static void mxser_rs_break(struct tty_struct *, int);
 412 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
 413 static void mxser_receive_chars(struct mxser_struct *, int *);
 414 static void mxser_transmit_chars(struct mxser_struct *);
 415 static void mxser_check_modem_status(struct mxser_struct *, int);
 416 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 417 static int mxser_startup(struct mxser_struct *);
 418 static void mxser_shutdown(struct mxser_struct *);
 419 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
 420 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 421 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 422 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 423 static void mxser_send_break(struct mxser_struct *, int);
 424 static int mxser_tiocmget(struct tty_struct *, struct file *);
 425 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 426 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 427 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 428
 429 static void mxser_startrx(struct tty_struct *tty);
 430 static void mxser_stoprx(struct tty_struct *tty);
 431
 432
 433 static int CheckIsMoxaMust(int io)
 434 {
 435         u8 oldmcr, hwid;
 436         int i;
 437
 438         outb(0, io + UART_LCR);
 439         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 440         oldmcr = inb(io + UART_MCR);
 441         outb(0, io + UART_MCR);
 442         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 443         if ((hwid = inb(io + UART_MCR)) != 0) {
 444                 outb(oldmcr, io + UART_MCR);
 445                 return (MOXA_OTHER_UART);
 446         }
 447
 448         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 449         for (i = 0; i < UART_TYPE_NUM; i++) {
 450                 if (hwid == Gmoxa_uart_id[i])
 451                         return (int) hwid;
 452         }
 453         return MOXA_OTHER_UART;
 454 }
 455
 456 // above is modified by Victor Yu. 08-15-2002
 457
 458 static struct tty_operations mxser_ops = {
 459         .open = mxser_open,
 460         .close = mxser_close,
 461         .write = mxser_write,
 462         .put_char = mxser_put_char,
 463         .flush_chars = mxser_flush_chars,
 464         .write_room = mxser_write_room,
 465         .chars_in_buffer = mxser_chars_in_buffer,
 466         .flush_buffer = mxser_flush_buffer,
 467         .ioctl = mxser_ioctl,
 468         .throttle = mxser_throttle,
 469         .unthrottle = mxser_unthrottle,
 470         .set_termios = mxser_set_termios,
 471         .stop = mxser_stop,
 472         .start = mxser_start,
 473         .hangup = mxser_hangup,
 474         .tiocmget = mxser_tiocmget,
 475         .tiocmset = mxser_tiocmset,
 476 };
 477
 478 /*
 479  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 480  */
 481
 482 static int __init mxser_module_init(void)
 483 {
 484         int ret;
 485
 486         if (verbose)
 487                 printk(KERN_DEBUG "Loading module mxser ...\n");
 488         ret = mxser_init();
 489         if (verbose)
 490                 printk(KERN_DEBUG "Done.\n");
 491         return ret;
 492 }
 493
 494 static void __exit mxser_module_exit(void)
 495 {
 496         int i, err = 0;
 497
 498         if (verbose)
 499                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 500
 501         if ((err |= tty_unregister_driver(mxvar_sdriver)))
 502                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 503
 504         for (i = 0; i < MXSER_BOARDS; i++) {
 505                 struct pci_dev *pdev;
 506
 507                 if (mxsercfg[i].board_type == -1)
 508                         continue;
 509                 else {
 510                         pdev = mxsercfg[i].pciInfo.pdev;
 511                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 512                         if (pdev != NULL) {     //PCI
 513                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 514                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 515                         } else {
 516                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 517                                 release_region(mxsercfg[i].vector, 1);
 518                         }
 519                 }
 520         }
 521         if (verbose)
 522                 printk(KERN_DEBUG "Done.\n");
 523
 524 }
 525
 526 static void process_txrx_fifo(struct mxser_struct *info)
 527 {
 528         int i;
 529
 530         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 531                 info->rx_trigger = 1;
 532                 info->rx_high_water = 1;
 533                 info->rx_low_water = 1;
 534                 info->xmit_fifo_size = 1;
 535         } else {
 536                 for (i = 0; i < UART_INFO_NUM; i++) {
 537                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 538                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 539                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 540                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 541                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 542                                 break;
 543                         }
 544                 }
 545         }
 546 }
 547
 548 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 549 {
 550         struct mxser_struct *info;
 551         int retval;
 552         int i, n;
 553
 554         n = board * MXSER_PORTS_PER_BOARD;
 555         info = &mxvar_table[n];
 556         /*if (verbose) */  {
 557                 printk(KERN_DEBUG "        ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
 558                 printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
 559         }
 560
 561         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 562                 info->port = n;
 563                 info->base = hwconf->ioaddr[i];
 564                 info->irq = hwconf->irq;
 565                 info->vector = hwconf->vector;
 566                 info->vectormask = hwconf->vector_mask;
 567                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
 568                 info->stop_rx = 0;
 569                 info->ldisc_stop_rx = 0;
 570
 571                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 572                 //Enhance mode enabled here
 573                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 574                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 575                 }
 576
 577                 info->flags = ASYNC_SHARE_IRQ;
 578                 info->type = hwconf->uart_type;
 579                 info->baud_base = hwconf->baud_base[i];
 580
 581                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 582
 583                 process_txrx_fifo(info);
 584
 585
 586                 info->custom_divisor = hwconf->baud_base[i] * 16;
 587                 info->close_delay = 5 * HZ / 10;
 588                 info->closing_wait = 30 * HZ;
 589                 INIT_WORK(&info->tqueue, mxser_do_softint, info);
 590                 info->normal_termios = mxvar_sdriver->init_termios;
 591                 init_waitqueue_head(&info->open_wait);
 592                 init_waitqueue_head(&info->close_wait);
 593                 init_waitqueue_head(&info->delta_msr_wait);
 594                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 595                 info->err_shadow = 0;
 596                 spin_lock_init(&info->slock);
 597         }
 598         /*
 599          * Allocate the IRQ if necessary
 600          */
 601
 602
 603         /* before set INT ISR, disable all int */
 604         for (i = 0; i < hwconf->ports; i++) {
 605                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
 606         }
 607
 608         n = board * MXSER_PORTS_PER_BOARD;
 609         info = &mxvar_table[n];
 610
 611         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
 612         if (retval) {
 613                 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
 614                 printk("  Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
 615                 return retval;
 616         }
 617         return 0;
 618 }
 619
 620
 621 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 622 {
 623         mxsercfg[board] = *hwconf;
 624 }
 625
 626 #ifdef CONFIG_PCI
 627 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 628 {
 629         int i, j;
 630 //      unsigned int    val;
 631         unsigned int ioaddress;
 632         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 633
 634         //io address
 635         hwconf->board_type = board_type;
 636         hwconf->ports = mxser_numports[board_type - 1];
 637         ioaddress = pci_resource_start(pdev, 2);
 638         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
 639
 640         for (i = 0; i < hwconf->ports; i++) {
 641                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 642         }
 643
 644         //vector
 645         ioaddress = pci_resource_start(pdev, 3);
 646         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
 647         hwconf->vector = ioaddress;
 648
 649         //irq
 650         hwconf->irq = hwconf->pciInfo.pdev->irq;
 651
 652         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 653         hwconf->uart_type = PORT_16550A;
 654         hwconf->vector_mask = 0;
 655
 656
 657         for (i = 0; i < hwconf->ports; i++) {
 658                 for (j = 0; j < UART_INFO_NUM; j++) {
 659                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 660                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 661
 662                                 //exception....CP-102
 663                                 if (board_type == MXSER_BOARD_CP102)
 664                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 665                                 break;
 666                         }
 667                 }
 668         }
 669
 670         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 671                 for (i = 0; i < hwconf->ports; i++) {
 672                         if (i < 4)
 673                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 674                         else
 675                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 676                 }
 677                 outb(0, ioaddress + 4); // default set to RS232 mode
 678                 outb(0, ioaddress + 0x0c);      //default set to RS232 mode
 679         }
 680
 681         for (i = 0; i < hwconf->ports; i++) {
 682                 hwconf->vector_mask |= (1 << i);
 683                 hwconf->baud_base[i] = 921600;
 684         }
 685         return (0);
 686 }
 687 #endif
 688
 689 static int mxser_init(void)
 690 {
 691         int i, m, retval, b, n;
 692         int ret1;
 693         struct pci_dev *pdev = NULL;
 694         int index;
 695         unsigned char busnum, devnum;
 696         struct mxser_hwconf hwconf;
 697
 698         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 699         if (!mxvar_sdriver)
 700                 return -ENOMEM;
 701         spin_lock_init(&gm_lock);
 702
 703         for (i = 0; i < MXSER_BOARDS; i++) {
 704                 mxsercfg[i].board_type = -1;
 705         }
 706
 707         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
 708
 709         /* Initialize the tty_driver structure */
 710         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 711         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 712         mxvar_sdriver->name = "ttyM";
 713         mxvar_sdriver->major = ttymajor;
 714         mxvar_sdriver->minor_start = 0;
 715         mxvar_sdriver->num = MXSER_PORTS + 1;
 716         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 717         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 718         mxvar_sdriver->init_termios = tty_std_termios;
 719         mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 720         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 721         tty_set_operations(mxvar_sdriver, &mxser_ops);
 722         mxvar_sdriver->ttys = mxvar_tty;
 723         mxvar_sdriver->termios = mxvar_termios;
 724         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 725
 726         mxvar_sdriver->open = mxser_open;
 727         mxvar_sdriver->close = mxser_close;
 728         mxvar_sdriver->write = mxser_write;
 729         mxvar_sdriver->put_char = mxser_put_char;
 730         mxvar_sdriver->flush_chars = mxser_flush_chars;
 731         mxvar_sdriver->write_room = mxser_write_room;
 732         mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer;
 733         mxvar_sdriver->flush_buffer = mxser_flush_buffer;
 734         mxvar_sdriver->ioctl = mxser_ioctl;
 735         mxvar_sdriver->throttle = mxser_throttle;
 736         mxvar_sdriver->unthrottle = mxser_unthrottle;
 737         mxvar_sdriver->set_termios = mxser_set_termios;
 738         mxvar_sdriver->stop = mxser_stop;
 739         mxvar_sdriver->start = mxser_start;
 740         mxvar_sdriver->hangup = mxser_hangup;
 741         mxvar_sdriver->break_ctl = mxser_rs_break;
 742         mxvar_sdriver->wait_until_sent = mxser_wait_until_sent;
 743
 744         mxvar_diagflag = 0;
 745         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 746         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 747
 748         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 749         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 750         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 751         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 752
 753         m = 0;
 754         /* Start finding ISA boards here */
 755         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 756                 int cap;
 757                 if (!(cap = mxserBoardCAP[b]))
 758                         continue;
 759
 760                 retval = mxser_get_ISA_conf(cap, &hwconf);
 761
 762                 if (retval != 0)
 763                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 764
 765                 if (retval <= 0) {
 766                         if (retval == MXSER_ERR_IRQ)
 767                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 768                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 769                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 770                         else if (retval == MXSER_ERR_VECTOR)
 771                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 772                         else if (retval == MXSER_ERR_IOADDR)
 773                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 774
 775                         continue;
 776                 }
 777
 778                 hwconf.pciInfo.busNum = 0;
 779                 hwconf.pciInfo.devNum = 0;
 780                 hwconf.pciInfo.pdev = NULL;
 781
 782                 mxser_getcfg(m, &hwconf);
 783                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 784                 //mxser_initbrd will hook ISR.
 785                 if (mxser_initbrd(m, &hwconf) < 0)
 786                         continue;
 787
 788
 789                 m++;
 790         }
 791
 792         /* Start finding ISA boards from module arg */
 793         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 794                 int cap;
 795                 if (!(cap = ioaddr[b]))
 796                         continue;
 797
 798                 retval = mxser_get_ISA_conf(cap, &hwconf);
 799
 800                 if (retval != 0)
 801                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 802
 803                 if (retval <= 0) {
 804                         if (retval == MXSER_ERR_IRQ)
 805                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 806                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 807                                 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 808                         else if (retval == MXSER_ERR_VECTOR)
 809                                 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 810                         else if (retval == MXSER_ERR_IOADDR)
 811                                 printk(KERN_ERR "Invalid I/O address,board not configured\n");
 812
 813                         continue;
 814                 }
 815
 816                 hwconf.pciInfo.busNum = 0;
 817                 hwconf.pciInfo.devNum = 0;
 818                 hwconf.pciInfo.pdev = NULL;
 819
 820                 mxser_getcfg(m, &hwconf);
 821                 //init mxsercfg first, or mxsercfg data is not correct on ISR.
 822                 //mxser_initbrd will hook ISR.
 823                 if (mxser_initbrd(m, &hwconf) < 0)
 824                         continue;
 825
 826                 m++;
 827         }
 828
 829         /* start finding PCI board here */
 830 #ifdef CONFIG_PCI
 831         n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
 832         index = 0;
 833         b = 0;
 834         while (b < n) {
 835                 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
 836                         if (pdev == NULL) {
 837                         b++;
 838                         continue;
 839                 }
 840                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 841                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 842                 hwconf.pciInfo.pdev = pdev;
 843                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
 844                 index++;
 845                 if (m >= MXSER_BOARDS) {
 846                         printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
 847                 } else {
 848                         if (pci_enable_device(pdev)) {
 849                                 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
 850                                 continue;
 851                         }
 852                         retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
 853                         if (retval < 0) {
 854                                 if (retval == MXSER_ERR_IRQ)
 855                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 856                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 857                                         printk(KERN_ERR "Invalid interrupt number,board not configured\n");
 858                                 else if (retval == MXSER_ERR_VECTOR)
 859                                         printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
 860                                 else if (retval == MXSER_ERR_IOADDR)
 861                                         printk(KERN_ERR "Invalid I/O address,board not configured\n");
 862                                 continue;
 863                         }
 864                         mxser_getcfg(m, &hwconf);
 865                         //init mxsercfg first, or mxsercfg data is not correct on ISR.
 866                         //mxser_initbrd will hook ISR.
 867                         if (mxser_initbrd(m, &hwconf) < 0)
 868                                 continue;
 869                         m++;
 870                 }
 871         }
 872 #endif
 873
 874         ret1 = 0;
 875         if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
 876                 return 0;
 877         } else
 878                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
 879
 880
 881         if (ret1) {
 882                 for (i = 0; i < MXSER_BOARDS; i++) {
 883                         if (mxsercfg[i].board_type == -1)
 884                                 continue;
 885                         else {
 886                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 887                                 //todo: release io, vector
 888                         }
 889                 }
 890                 return -1;
 891         }
 892
 893         return (0);
 894 }
 895
 896 static void mxser_do_softint(void *private_)
 897 {
 898         struct mxser_struct *info = (struct mxser_struct *) private_;
 899         struct tty_struct *tty;
 900
 901         tty = info->tty;
 902
 903         if (tty) {
 904                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 905                         tty_wakeup(tty);
 906                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 907                         tty_hangup(tty);
 908         }
 909 }
 910
 911 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 912 {
 913         unsigned char status = 0;
 914
 915         status = inb(baseaddr + UART_MSR);
 916
 917         mxser_msr[port] &= 0x0F;
 918         mxser_msr[port] |= status;
 919         status = mxser_msr[port];
 920         if (mode)
 921                 mxser_msr[port] = 0;
 922
 923         return status;
 924 }
 925
 926 /*
 927  * This routine is called whenever a serial port is opened.  It
 928  * enables interrupts for a serial port, linking in its async structure into
 929  * the IRQ chain.   It also performs the serial-specific
 930  * initialization for the tty structure.
 931  */
 932 static int mxser_open(struct tty_struct *tty, struct file *filp)
 933 {
 934         struct mxser_struct *info;
 935         int retval, line;
 936
 937         line = tty->index;
 938         if (line == MXSER_PORTS)
 939                 return 0;
 940         if (line < 0 || line > MXSER_PORTS)
 941                 return -ENODEV;
 942         info = mxvar_table + line;
 943         if (!info->base)
 944                 return (-ENODEV);
 945
 946         tty->driver_data = info;
 947         info->tty = tty;
 948         /*
 949          * Start up serial port
 950          */
 951         retval = mxser_startup(info);
 952         if (retval)
 953                 return (retval);
 954
 955         retval = mxser_block_til_ready(tty, filp, info);
 956         if (retval)
 957                 return (retval);
 958
 959         info->count++;
 960
 961         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 962                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 963                         *tty->termios = info->normal_termios;
 964                 else
 965                         *tty->termios = info->callout_termios;
 966                 mxser_change_speed(info, NULL);
 967         }
 968
 969         info->session = current->signal->session;
 970         info->pgrp = process_group(current);
 971         clear_bit(TTY_DONT_FLIP, &tty->flags);
 972
 973         //status = mxser_get_msr(info->base, 0, info->port);
 974         //mxser_check_modem_status(info, status);
 975
 976 /* unmark here for very high baud rate (ex. 921600 bps) used
 977 */
 978         tty->low_latency = 1;
 979         return 0;
 980 }
 981
 982 /*
 983  * This routine is called when the serial port gets closed.  First, we
 984  * wait for the last remaining data to be sent.  Then, we unlink its
 985  * async structure from the interrupt chain if necessary, and we free
 986  * that IRQ if nothing is left in the chain.
 987  */
 988 static void mxser_close(struct tty_struct *tty, struct file *filp)
 989 {
 990         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
 991
 992         unsigned long timeout;
 993         unsigned long flags;
 994         struct tty_ldisc *ld;
 995
 996         if (tty->index == MXSER_PORTS)
 997                 return;
 998         if (!info)
 999                 BUG();
1000
1001         spin_lock_irqsave(&info->slock, flags);
1002
1003         if (tty_hung_up_p(filp)) {
1004                 spin_unlock_irqrestore(&info->slock, flags);
1005                 return;
1006         }
1007         if ((tty->count == 1) && (info->count != 1)) {
1008                 /*
1009                  * Uh, oh.  tty->count is 1, which means that the tty
1010                  * structure will be freed.  Info->count should always
1011                  * be one in these conditions.  If it's greater than
1012                  * one, we've got real problems, since it means the
1013                  * serial port won't be shutdown.
1014                  */
1015                 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
1016                 info->count = 1;
1017         }
1018         if (--info->count < 0) {
1019                 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1020                 info->count = 0;
1021         }
1022         if (info->count) {
1023                 spin_unlock_irqrestore(&info->slock, flags);
1024                 return;
1025         }
1026         info->flags |= ASYNC_CLOSING;
1027         spin_unlock_irqrestore(&info->slock, flags);
1028         /*
1029          * Save the termios structure, since this port may have
1030          * separate termios for callout and dialin.
1031          */
1032         if (info->flags & ASYNC_NORMAL_ACTIVE)
1033                 info->normal_termios = *tty->termios;
1034         /*
1035          * Now we wait for the transmit buffer to clear; and we notify
1036          * the line discipline to only process XON/XOFF characters.
1037          */
1038         tty->closing = 1;
1039         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1040                 tty_wait_until_sent(tty, info->closing_wait);
1041         /*
1042          * At this point we stop accepting input.  To do this, we
1043          * disable the receive line status interrupts, and tell the
1044          * interrupt driver to stop checking the data ready bit in the
1045          * line status register.
1046          */
1047         info->IER &= ~UART_IER_RLSI;
1048         if (info->IsMoxaMustChipFlag)
1049                 info->IER &= ~MOXA_MUST_RECV_ISR;
1050 /* by William
1051         info->read_status_mask &= ~UART_LSR_DR;
1052 */
1053         if (info->flags & ASYNC_INITIALIZED) {
1054                 outb(info->IER, info->base + UART_IER);
1055                 /*
1056                  * Before we drop DTR, make sure the UART transmitter
1057                  * has completely drained; this is especially
1058                  * important if there is a transmit FIFO!
1059                  */
1060                 timeout = jiffies + HZ;
1061                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1062                         set_current_state(TASK_INTERRUPTIBLE);
1063                         schedule_timeout(5);
1064                         if (time_after(jiffies, timeout))
1065                                 break;
1066                 }
1067         }
1068         mxser_shutdown(info);
1069
1070         if (tty->driver->flush_buffer)
1071                 tty->driver->flush_buffer(tty);
1072
1073         ld = tty_ldisc_ref(tty);
1074         if (ld) {
1075                 if(ld->flush_buffer)
1076                         ld->flush_buffer(tty);
1077                 tty_ldisc_deref(ld);
1078         }
1079
1080         tty->closing = 0;
1081         info->event = 0;
1082         info->tty = NULL;
1083         if (info->blocked_open) {
1084                 if (info->close_delay) {
1085                         set_current_state(TASK_INTERRUPTIBLE);
1086                         schedule_timeout(info->close_delay);
1087                 }
1088                 wake_up_interruptible(&info->open_wait);
1089         }
1090
1091         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1092         wake_up_interruptible(&info->close_wait);
1093
1094 }
1095
1096 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1097 {
1098         int c, total = 0;
1099         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1100         unsigned long flags;
1101
1102         if (!tty || !info->xmit_buf)
1103                 return (0);
1104
1105         while (1) {
1106                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1107                 if (c <= 0)
1108                         break;
1109
1110                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1111                 spin_lock_irqsave(&info->slock, flags);
1112                 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1113                 info->xmit_cnt += c;
1114                 spin_unlock_irqrestore(&info->slock, flags);
1115
1116                 buf += c;
1117                 count -= c;
1118                 total += c;
1119
1120         }
1121
1122         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1123                 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1124                         spin_lock_irqsave(&info->slock, flags);
1125                         info->IER |= UART_IER_THRI;
1126                         outb(info->IER, info->base + UART_IER);
1127                         spin_unlock_irqrestore(&info->slock, flags);
1128                 }
1129         }
1130         return total;
1131 }
1132
1133 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1134 {
1135         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1136         unsigned long flags;
1137
1138         if (!tty || !info->xmit_buf)
1139                 return;
1140
1141         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1142                 return;
1143
1144         spin_lock_irqsave(&info->slock, flags);
1145         info->xmit_buf[info->xmit_head++] = ch;
1146         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1147         info->xmit_cnt++;
1148         spin_unlock_irqrestore(&info->slock, flags);
1149         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1150                 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1151                         spin_lock_irqsave(&info->slock, flags);
1152                         info->IER |= UART_IER_THRI;
1153                         outb(info->IER, info->base + UART_IER);
1154                         spin_unlock_irqrestore(&info->slock, flags);
1155                 }
1156         }
1157 }
1158
1159
1160 static void mxser_flush_chars(struct tty_struct *tty)
1161 {
1162         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1163         unsigned long flags;
1164
1165         if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1166                 return;
1167
1168         spin_lock_irqsave(&info->slock, flags);
1169
1170         info->IER |= UART_IER_THRI;
1171         outb(info->IER, info->base + UART_IER);
1172
1173         spin_unlock_irqrestore(&info->slock, flags);
1174 }
1175
1176 static int mxser_write_room(struct tty_struct *tty)
1177 {
1178         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1179         int ret;
1180
1181         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1182         if (ret < 0)
1183                 ret = 0;
1184         return (ret);
1185 }
1186
1187 static int mxser_chars_in_buffer(struct tty_struct *tty)
1188 {
1189         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1190         return info->xmit_cnt;
1191 }
1192
1193 static void mxser_flush_buffer(struct tty_struct *tty)
1194 {
1195         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1196         char fcr;
1197         unsigned long flags;
1198
1199
1200         spin_lock_irqsave(&info->slock, flags);
1201         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1202
1203         /* below added by shinhay */
1204         fcr = inb(info->base + UART_FCR);
1205         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1206         outb(fcr, info->base + UART_FCR);
1207
1208         spin_unlock_irqrestore(&info->slock, flags);
1209         /* above added by shinhay */
1210
1211         wake_up_interruptible(&tty->write_wait);
1212         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1213                 (tty->ldisc.write_wakeup) (tty);
1214 }
1215
1216 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1217 {
1218         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1219         int retval;
1220         struct async_icount cprev, cnow;        /* kernel counter temps */
1221         struct serial_icounter_struct __user *p_cuser;
1222         unsigned long templ;
1223         unsigned long flags;
1224         void __user *argp = (void __user *)arg;
1225
1226         if (tty->index == MXSER_PORTS)
1227                 return (mxser_ioctl_special(cmd, argp));
1228
1229         // following add by Victor Yu. 01-05-2004
1230         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1231                 int opmode, p;
1232                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1233                 int shiftbit;
1234                 unsigned char val, mask;
1235
1236                 p = info->port % 4;
1237                 if (cmd == MOXA_SET_OP_MODE) {
1238                         if (get_user(opmode, (int __user *) argp))
1239                                 return -EFAULT;
1240                         if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1241                                 return -EFAULT;
1242                         mask = ModeMask[p];
1243                         shiftbit = p * 2;
1244                         val = inb(info->opmode_ioaddr);
1245                         val &= mask;
1246                         val |= (opmode << shiftbit);
1247                         outb(val, info->opmode_ioaddr);
1248                 } else {
1249                         shiftbit = p * 2;
1250                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1251                         opmode &= OP_MODE_MASK;
1252                         if (copy_to_user(argp, &opmode, sizeof(int)))
1253                                 return -EFAULT;
1254                 }
1255                 return 0;
1256         }
1257         // above add by Victor Yu. 01-05-2004
1258
1259         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1260                 if (tty->flags & (1 << TTY_IO_ERROR))
1261                         return (-EIO);
1262         }
1263         switch (cmd) {
1264         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1265                 retval = tty_check_change(tty);
1266                 if (retval)
1267                         return (retval);
1268                 tty_wait_until_sent(tty, 0);
1269                 if (!arg)
1270                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1271                 return (0);
1272         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1273                 retval = tty_check_change(tty);
1274                 if (retval)
1275                         return (retval);
1276                 tty_wait_until_sent(tty, 0);
1277                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1278                 return (0);
1279         case TIOCGSOFTCAR:
1280                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1281         case TIOCSSOFTCAR:
1282                 if (get_user(templ, (unsigned long __user *) argp))
1283                         return -EFAULT;
1284                 arg = templ;
1285                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1286                 return (0);
1287         case TIOCGSERIAL:
1288                 return mxser_get_serial_info(info, argp);
1289         case TIOCSSERIAL:
1290                 return mxser_set_serial_info(info, argp);
1291         case TIOCSERGETLSR:     /* Get line status register */
1292                 return mxser_get_lsr_info(info, argp);
1293                 /*
1294                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1295                  * - mask passed in arg for lines of interest
1296                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1297                  * Caller should use TIOCGICOUNT to see which one it was
1298                  */
1299         case TIOCMIWAIT:{
1300                         DECLARE_WAITQUEUE(wait, current);
1301                         int ret;
1302                         spin_lock_irqsave(&info->slock, flags);
1303                         cprev = info->icount;   /* note the counters on entry */
1304                         spin_unlock_irqrestore(&info->slock, flags);
1305
1306                         add_wait_queue(&info->delta_msr_wait, &wait);
1307                         while (1) {
1308                                 spin_lock_irqsave(&info->slock, flags);
1309                                 cnow = info->icount;    /* atomic copy */
1310                                 spin_unlock_irqrestore(&info->slock, flags);
1311
1312                                 set_current_state(TASK_INTERRUPTIBLE);
1313                                 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))) {
1314                                         ret = 0;
1315                                         break;
1316                                 }
1317                                 /* see if a signal did it */
1318                                 if (signal_pending(current)) {
1319                                         ret = -ERESTARTSYS;
1320                                         break;
1321                                 }
1322                                 cprev = cnow;
1323                         }
1324                         current->state = TASK_RUNNING;
1325                         remove_wait_queue(&info->delta_msr_wait, &wait);
1326                         break;
1327                 }
1328                 /* NOTREACHED */
1329                 /*
1330                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1331                  * Return: write counters to the user passed counter struct
1332                  * NB: both 1->0 and 0->1 transitions are counted except for
1333                  *     RI where only 0->1 is counted.
1334                  */
1335         case TIOCGICOUNT:
1336                 spin_lock_irqsave(&info->slock, flags);
1337                 cnow = info->icount;
1338                 spin_unlock_irqrestore(&info->slock, flags);
1339                 p_cuser = argp;
1340                 /* modified by casper 1/11/2000 */
1341                 if (put_user(cnow.frame, &p_cuser->frame))
1342                         return -EFAULT;
1343                 if (put_user(cnow.brk, &p_cuser->brk))
1344                         return -EFAULT;
1345                 if (put_user(cnow.overrun, &p_cuser->overrun))
1346                         return -EFAULT;
1347                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1348                         return -EFAULT;
1349                 if (put_user(cnow.parity, &p_cuser->parity))
1350                         return -EFAULT;
1351                 if (put_user(cnow.rx, &p_cuser->rx))
1352                         return -EFAULT;
1353                 if (put_user(cnow.tx, &p_cuser->tx))
1354                         return -EFAULT;
1355                 put_user(cnow.cts, &p_cuser->cts);
1356                 put_user(cnow.dsr, &p_cuser->dsr);
1357                 put_user(cnow.rng, &p_cuser->rng);
1358                 put_user(cnow.dcd, &p_cuser->dcd);
1359
1360 /* */
1361                 return 0;
1362         case MOXA_HighSpeedOn:
1363                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1364
1365         case MOXA_SDS_RSTICOUNTER:{
1366                         info->mon_data.rxcnt = 0;
1367                         info->mon_data.txcnt = 0;
1368                         return 0;
1369                 }
1370 // (above) added by James.
1371         case MOXA_ASPP_SETBAUD:{
1372                         long baud;
1373                         if (get_user(baud, (long __user *) argp))
1374                                 return -EFAULT;
1375                         mxser_set_baud(info, baud);
1376                         return 0;
1377                 }
1378         case MOXA_ASPP_GETBAUD:
1379                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1380                         return -EFAULT;
1381
1382                 return 0;
1383
1384         case MOXA_ASPP_OQUEUE:{
1385                         int len, lsr;
1386
1387                         len = mxser_chars_in_buffer(tty);
1388
1389                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1390
1391                         len += (lsr ? 0 : 1);
1392
1393                         if (copy_to_user(argp, &len, sizeof(int)))
1394                                 return -EFAULT;
1395
1396                         return 0;
1397                 }
1398         case MOXA_ASPP_MON:{
1399                         int mcr, status;
1400 //      info->mon_data.ser_param = tty->termios->c_cflag;
1401
1402                         status = mxser_get_msr(info->base, 1, info->port, info);
1403                         mxser_check_modem_status(info, status);
1404
1405                         mcr = inb(info->base + UART_MCR);
1406                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1407                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1408                         else
1409                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1410
1411                         if (mcr & MOXA_MUST_MCR_TX_XON)
1412                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1413                         else
1414                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1415
1416                         if (info->tty->hw_stopped)
1417                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1418                         else
1419                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1420
1421
1422                         if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1423                                 return -EFAULT;
1424
1425                         return 0;
1426
1427                 }
1428
1429         case MOXA_ASPP_LSTATUS:{
1430                         if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1431                                 return -EFAULT;
1432
1433                         info->err_shadow = 0;
1434                         return 0;
1435
1436                 }
1437         case MOXA_SET_BAUD_METHOD:{
1438                         int method;
1439                         if (get_user(method, (int __user *) argp))
1440                                 return -EFAULT;
1441                         mxser_set_baud_method[info->port] = method;
1442                         if (copy_to_user(argp, &method, sizeof(int)))
1443                                 return -EFAULT;
1444
1445                         return 0;
1446                 }
1447         default:
1448                 return -ENOIOCTLCMD;
1449         }
1450         return 0;
1451 }
1452
1453 #ifndef CMSPAR
1454 #define CMSPAR 010000000000
1455 #endif
1456
1457 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1458 {
1459         int i, result, status;
1460
1461         switch (cmd) {
1462         case MOXA_GET_CONF:
1463                 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1464                         return -EFAULT;
1465                 return 0;
1466         case MOXA_GET_MAJOR:
1467                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1468                         return -EFAULT;
1469                 return 0;
1470
1471         case MOXA_GET_CUMAJOR:
1472                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1473                         return -EFAULT;
1474                 return 0;
1475
1476         case MOXA_CHKPORTENABLE:
1477                 result = 0;
1478                 for (i = 0; i < MXSER_PORTS; i++) {
1479                         if (mxvar_table[i].base)
1480                                 result |= (1 << i);
1481                 }
1482                 return put_user(result, (unsigned long __user *) argp);
1483         case MOXA_GETDATACOUNT:
1484                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1485                         return -EFAULT;
1486                 return (0);
1487         case MOXA_GETMSTATUS:
1488                 for (i = 0; i < MXSER_PORTS; i++) {
1489                         GMStatus[i].ri = 0;
1490                         if (!mxvar_table[i].base) {
1491                                 GMStatus[i].dcd = 0;
1492                                 GMStatus[i].dsr = 0;
1493                                 GMStatus[i].cts = 0;
1494                                 continue;
1495                         }
1496
1497                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1498                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1499                         else
1500                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1501
1502                         status = inb(mxvar_table[i].base + UART_MSR);
1503                         if (status & 0x80 /*UART_MSR_DCD */ )
1504                                 GMStatus[i].dcd = 1;
1505                         else
1506                                 GMStatus[i].dcd = 0;
1507
1508                         if (status & 0x20 /*UART_MSR_DSR */ )
1509                                 GMStatus[i].dsr = 1;
1510                         else
1511                                 GMStatus[i].dsr = 0;
1512
1513
1514                         if (status & 0x10 /*UART_MSR_CTS */ )
1515                                 GMStatus[i].cts = 1;
1516                         else
1517                                 GMStatus[i].cts = 0;
1518                 }
1519                 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1520                         return -EFAULT;
1521                 return 0;
1522         case MOXA_ASPP_MON_EXT:{
1523                         int status;
1524                         int opmode, p;
1525                         int shiftbit;
1526                         unsigned cflag, iflag;
1527
1528                         for (i = 0; i < MXSER_PORTS; i++) {
1529
1530                                 if (!mxvar_table[i].base)
1531                                         continue;
1532
1533                                 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1534 //                      mxser_check_modem_status(&mxvar_table[i], status);
1535                                 if (status & UART_MSR_TERI)
1536                                         mxvar_table[i].icount.rng++;
1537                                 if (status & UART_MSR_DDSR)
1538                                         mxvar_table[i].icount.dsr++;
1539                                 if (status & UART_MSR_DDCD)
1540                                         mxvar_table[i].icount.dcd++;
1541                                 if (status & UART_MSR_DCTS)
1542                                         mxvar_table[i].icount.cts++;
1543
1544                                 mxvar_table[i].mon_data.modem_status = status;
1545                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1546                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1547                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1548                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1549                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1550                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1551
1552                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1553                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1554                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1555                                 } else {
1556                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1557                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1558                                 }
1559
1560                                 mon_data_ext.databits[i] = cflag & CSIZE;
1561
1562                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1563
1564                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1565
1566                                 mon_data_ext.flowctrl[i] = 0x00;
1567
1568                                 if (cflag & CRTSCTS)
1569                                         mon_data_ext.flowctrl[i] |= 0x03;
1570
1571                                 if (iflag & (IXON | IXOFF))
1572                                         mon_data_ext.flowctrl[i] |= 0x0C;
1573
1574                                 if (mxvar_table[i].type == PORT_16550A)
1575                                         mon_data_ext.fifo[i] = 1;
1576                                 else
1577                                         mon_data_ext.fifo[i] = 0;
1578
1579                                 p = i % 4;
1580                                 shiftbit = p * 2;
1581                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1582                                 opmode &= OP_MODE_MASK;
1583
1584                                 mon_data_ext.iftype[i] = opmode;
1585
1586                         }
1587                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1588                                 return -EFAULT;
1589
1590                         return 0;
1591
1592                 }
1593         default:
1594                 return -ENOIOCTLCMD;
1595         }
1596         return 0;
1597 }
1598
1599
1600 static void mxser_stoprx(struct tty_struct *tty)
1601 {
1602         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1603         //unsigned long flags;
1604
1605
1606         info->ldisc_stop_rx = 1;
1607         if (I_IXOFF(tty)) {
1608
1609                 //MX_LOCK(&info->slock);
1610                 // following add by Victor Yu. 09-02-2002
1611                 if (info->IsMoxaMustChipFlag) {
1612                         info->IER &= ~MOXA_MUST_RECV_ISR;
1613                         outb(info->IER, info->base + UART_IER);
1614                 } else {
1615                         // above add by Victor Yu. 09-02-2002
1616
1617                         info->x_char = STOP_CHAR(tty);
1618                         //      outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1619                         outb(0, info->base + UART_IER);
1620                         info->IER |= UART_IER_THRI;
1621                         outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1622                 }               // add by Victor Yu. 09-02-2002
1623                 //MX_UNLOCK(&info->slock);
1624         }
1625
1626         if (info->tty->termios->c_cflag & CRTSCTS) {
1627                 //MX_LOCK(&info->slock);
1628                 info->MCR &= ~UART_MCR_RTS;
1629                 outb(info->MCR, info->base + UART_MCR);
1630                 //MX_UNLOCK(&info->slock);
1631         }
1632 }
1633
1634 static void mxser_startrx(struct tty_struct *tty)
1635 {
1636         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1637         //unsigned long flags;
1638
1639         info->ldisc_stop_rx = 0;
1640         if (I_IXOFF(tty)) {
1641                 if (info->x_char)
1642                         info->x_char = 0;
1643                 else {
1644                         //MX_LOCK(&info->slock);
1645
1646                         // following add by Victor Yu. 09-02-2002
1647                         if (info->IsMoxaMustChipFlag) {
1648                                 info->IER |= MOXA_MUST_RECV_ISR;
1649                                 outb(info->IER, info->base + UART_IER);
1650                         } else {
1651                                 // above add by Victor Yu. 09-02-2002
1652
1653                                 info->x_char = START_CHAR(tty);
1654                                 //          outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1655                                 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1656                                 info->IER |= UART_IER_THRI;     /* force Tx interrupt */
1657                                 outb(info->IER, info->base + UART_IER);
1658                         }       // add by Victor Yu. 09-02-2002
1659                         //MX_UNLOCK(&info->slock);
1660                 }
1661         }
1662
1663         if (info->tty->termios->c_cflag & CRTSCTS) {
1664                 //MX_LOCK(&info->slock);
1665                 info->MCR |= UART_MCR_RTS;
1666                 outb(info->MCR, info->base + UART_MCR);
1667                 //MX_UNLOCK(&info->slock);
1668         }
1669 }
1670
1671 /*
1672  * This routine is called by the upper-layer tty layer to signal that
1673  * incoming characters should be throttled.
1674  */
1675 static void mxser_throttle(struct tty_struct *tty)
1676 {
1677         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1678         //unsigned long flags;
1679         //MX_LOCK(&info->slock);
1680         mxser_stoprx(tty);
1681         //MX_UNLOCK(&info->slock);
1682 }
1683
1684 static void mxser_unthrottle(struct tty_struct *tty)
1685 {
1686         //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1687         //unsigned long flags;
1688         //MX_LOCK(&info->slock);
1689         mxser_startrx(tty);
1690         //MX_UNLOCK(&info->slock);
1691 }
1692
1693 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1694 {
1695         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1696         unsigned long flags;
1697
1698         if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1699
1700                 mxser_change_speed(info, old_termios);
1701
1702                 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1703                         tty->hw_stopped = 0;
1704                         mxser_start(tty);
1705                 }
1706         }
1707
1708 /* Handle sw stopped */
1709         if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1710                 tty->stopped = 0;
1711
1712                 // following add by Victor Yu. 09-02-2002
1713                 if (info->IsMoxaMustChipFlag) {
1714                         spin_lock_irqsave(&info->slock, flags);
1715                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1716                         spin_unlock_irqrestore(&info->slock, flags);
1717                 }
1718                 // above add by Victor Yu. 09-02-2002
1719
1720                 mxser_start(tty);
1721         }
1722 }
1723
1724 /*
1725  * mxser_stop() and mxser_start()
1726  *
1727  * This routines are called before setting or resetting tty->stopped.
1728  * They enable or disable transmitter interrupts, as necessary.
1729  */
1730 static void mxser_stop(struct tty_struct *tty)
1731 {
1732         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1733         unsigned long flags;
1734
1735         spin_lock_irqsave(&info->slock, flags);
1736         if (info->IER & UART_IER_THRI) {
1737                 info->IER &= ~UART_IER_THRI;
1738                 outb(info->IER, info->base + UART_IER);
1739         }
1740         spin_unlock_irqrestore(&info->slock, flags);
1741 }
1742
1743 static void mxser_start(struct tty_struct *tty)
1744 {
1745         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1746         unsigned long flags;
1747
1748         spin_lock_irqsave(&info->slock, flags);
1749         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1750                 info->IER |= UART_IER_THRI;
1751                 outb(info->IER, info->base + UART_IER);
1752         }
1753         spin_unlock_irqrestore(&info->slock, flags);
1754 }
1755
1756 /*
1757  * mxser_wait_until_sent() --- wait until the transmitter is empty
1758  */
1759 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1760 {
1761         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1762         unsigned long orig_jiffies, char_time;
1763         int lsr;
1764
1765         if (info->type == PORT_UNKNOWN)
1766                 return;
1767
1768         if (info->xmit_fifo_size == 0)
1769                 return;         /* Just in case.... */
1770
1771         orig_jiffies = jiffies;
1772         /*
1773          * Set the check interval to be 1/5 of the estimated time to
1774          * send a single character, and make it at least 1.  The check
1775          * interval should also be less than the timeout.
1776          *
1777          * Note: we have to use pretty tight timings here to satisfy
1778          * the NIST-PCTS.
1779          */
1780         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1781         char_time = char_time / 5;
1782         if (char_time == 0)
1783                 char_time = 1;
1784         if (timeout && timeout < char_time)
1785                 char_time = timeout;
1786         /*
1787          * If the transmitter hasn't cleared in twice the approximate
1788          * amount of time to send the entire FIFO, it probably won't
1789          * ever clear.  This assumes the UART isn't doing flow
1790          * control, which is currently the case.  Hence, if it ever
1791          * takes longer than info->timeout, this is probably due to a
1792          * UART bug of some kind.  So, we clamp the timeout parameter at
1793          * 2*info->timeout.
1794          */
1795         if (!timeout || timeout > 2 * info->timeout)
1796                 timeout = 2 * info->timeout;
1797 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1798         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1799         printk("jiff=%lu...", jiffies);
1800 #endif
1801         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1802 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1803                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1804 #endif
1805                 set_current_state(TASK_INTERRUPTIBLE);
1806                 schedule_timeout(char_time);
1807                 if (signal_pending(current))
1808                         break;
1809                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1810                         break;
1811         }
1812         set_current_state(TASK_RUNNING);
1813
1814 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1815         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1816 #endif
1817 }
1818
1819
1820 /*
1821  * This routine is called by tty_hangup() when a hangup is signaled.
1822  */
1823 void mxser_hangup(struct tty_struct *tty)
1824 {
1825         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1826
1827         mxser_flush_buffer(tty);
1828         mxser_shutdown(info);
1829         info->event = 0;
1830         info->count = 0;
1831         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1832         info->tty = NULL;
1833         wake_up_interruptible(&info->open_wait);
1834 }
1835
1836
1837 // added by James 03-12-2004.
1838 /*
1839  * mxser_rs_break() --- routine which turns the break handling on or off
1840  */
1841 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1842 {
1843         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1844         unsigned long flags;
1845
1846         spin_lock_irqsave(&info->slock, flags);
1847         if (break_state == -1)
1848                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1849         else
1850                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1851         spin_unlock_irqrestore(&info->slock, flags);
1852 }
1853
1854 // (above) added by James.
1855
1856
1857 /*
1858  * This is the serial driver's generic interrupt routine
1859  */
1860 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1861 {
1862         int status, iir, i;
1863         struct mxser_struct *info;
1864         struct mxser_struct *port;
1865         int max, irqbits, bits, msr;
1866         int pass_counter = 0;
1867         int handled = IRQ_NONE;
1868
1869         port = NULL;
1870         //spin_lock(&gm_lock);
1871
1872         for (i = 0; i < MXSER_BOARDS; i++) {
1873                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1874                         port = dev_id;
1875                         break;
1876                 }
1877         }
1878
1879         if (i == MXSER_BOARDS) {
1880                 goto irq_stop;
1881         }
1882         if (port == 0) {
1883                 goto irq_stop;
1884         }
1885         max = mxser_numports[mxsercfg[i].board_type - 1];
1886         while (1) {
1887                 irqbits = inb(port->vector) & port->vectormask;
1888                 if (irqbits == port->vectormask) {
1889                         break;
1890                 }
1891
1892                 handled = IRQ_HANDLED;
1893                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1894                         if (irqbits == port->vectormask) {
1895                                 break;
1896                         }
1897                         if (bits & irqbits)
1898                                 continue;
1899                         info = port + i;
1900
1901                         // following add by Victor Yu. 09-13-2002
1902                         iir = inb(info->base + UART_IIR);
1903                         if (iir & UART_IIR_NO_INT)
1904                                 continue;
1905                         iir &= MOXA_MUST_IIR_MASK;
1906                         if (!info->tty) {
1907                                 status = inb(info->base + UART_LSR);
1908                                 outb(0x27, info->base + UART_FCR);
1909                                 inb(info->base + UART_MSR);
1910                                 continue;
1911                         }
1912                         // above add by Victor Yu. 09-13-2002
1913                         /*
1914                            if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1915                            info->IER |= MOXA_MUST_RECV_ISR;
1916                            outb(info->IER, info->base + UART_IER);
1917                            }
1918                          */
1919
1920
1921                         /* mask by Victor Yu. 09-13-2002
1922                            if ( !info->tty ||
1923                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1924                            continue;
1925                          */
1926                         /* mask by Victor Yu. 09-02-2002
1927                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1928                          */
1929
1930                         // following add by Victor Yu. 09-02-2002
1931                         status = inb(info->base + UART_LSR);
1932
1933                         if (status & UART_LSR_PE) {
1934                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1935                         }
1936                         if (status & UART_LSR_FE) {
1937                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1938                         }
1939                         if (status & UART_LSR_OE) {
1940                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1941                         }
1942                         if (status & UART_LSR_BI)
1943                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
1944
1945                         if (info->IsMoxaMustChipFlag) {
1946                                 /*
1947                                    if ( (status & 0x02) && !(status & 0x01) ) {
1948                                    outb(info->base+UART_FCR,  0x23);
1949                                    continue;
1950                                    }
1951                                  */
1952                                 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1953                                         mxser_receive_chars(info, &status);
1954
1955                         } else {
1956                                 // above add by Victor Yu. 09-02-2002
1957
1958                                 status &= info->read_status_mask;
1959                                 if (status & UART_LSR_DR)
1960                                         mxser_receive_chars(info, &status);
1961                         }
1962                         msr = inb(info->base + UART_MSR);
1963                         if (msr & UART_MSR_ANY_DELTA) {
1964                                 mxser_check_modem_status(info, msr);
1965                         }
1966                         // following add by Victor Yu. 09-13-2002
1967                         if (info->IsMoxaMustChipFlag) {
1968                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1969                                         mxser_transmit_chars(info);
1970                                 }
1971                         } else {
1972                                 // above add by Victor Yu. 09-13-2002
1973
1974                                 if (status & UART_LSR_THRE) {
1975 /* 8-2-99 by William
1976                             if ( info->x_char || (info->xmit_cnt > 0) )
1977 */
1978                                         mxser_transmit_chars(info);
1979                                 }
1980                         }
1981                 }
1982                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1983                         break;  /* Prevent infinite loops */
1984                 }
1985         }
1986
1987       irq_stop:
1988         //spin_unlock(&gm_lock);
1989         return handled;
1990 }
1991
1992 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1993 {
1994         struct tty_struct *tty = info->tty;
1995         unsigned char ch, gdl;
1996         int ignored = 0;
1997         int cnt = 0;
1998         unsigned char *cp;
1999         char *fp;
2000         int count;
2001         int recv_room;
2002         int max = 256;
2003         unsigned long flags;
2004
2005         spin_lock_irqsave(&info->slock, flags);
2006
2007         recv_room = tty->ldisc.receive_room(tty);
2008         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2009                 //mxser_throttle(tty);
2010                 mxser_stoprx(tty);
2011                 //return;
2012         }
2013
2014         cp = tty->flip.char_buf;
2015         fp = tty->flip.flag_buf;
2016         count = 0;
2017
2018         // following add by Victor Yu. 09-02-2002
2019         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2020
2021                 if (*status & UART_LSR_SPECIAL) {
2022                         goto intr_old;
2023                 }
2024                 // following add by Victor Yu. 02-11-2004
2025                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2026                         goto intr_old;
2027                 // above add by Victor Yu. 02-14-2004
2028                 if (*status & MOXA_MUST_LSR_RERR)
2029                         goto intr_old;
2030
2031                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2032
2033                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)   // add by Victor Yu. 02-11-2004
2034                         gdl &= MOXA_MUST_GDL_MASK;
2035                 if (gdl >= recv_room) {
2036                         if (!info->ldisc_stop_rx) {
2037                                 //mxser_throttle(tty);
2038                                 mxser_stoprx(tty);
2039                         }
2040                         //return;
2041                 }
2042                 while (gdl--) {
2043                         ch = inb(info->base + UART_RX);
2044                         count++;
2045                         *cp++ = ch;
2046                         *fp++ = 0;
2047                         cnt++;
2048                         /*
2049                            if((count>=HI_WATER) && (info->stop_rx==0)){
2050                            mxser_stoprx(tty);
2051                            info->stop_rx=1;
2052                            break;
2053                            } */
2054                 }
2055                 goto end_intr;
2056         }
2057 intr_old:
2058         // above add by Victor Yu. 09-02-2002
2059
2060         do {
2061                 if (max-- < 0)
2062                         break;
2063                 /*
2064                    if((count>=HI_WATER) && (info->stop_rx==0)){
2065                    mxser_stoprx(tty);
2066                    info->stop_rx=1;
2067                    break;
2068                    }
2069                  */
2070
2071                 ch = inb(info->base + UART_RX);
2072                 // following add by Victor Yu. 09-02-2002
2073                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2074                         outb(0x23, info->base + UART_FCR);
2075                 *status &= info->read_status_mask;
2076                 // above add by Victor Yu. 09-02-2002
2077                 if (*status & info->ignore_status_mask) {
2078                         if (++ignored > 100)
2079                                 break;
2080                 } else {
2081                         count++;
2082                         if (*status & UART_LSR_SPECIAL) {
2083                                 if (*status & UART_LSR_BI) {
2084                                         *fp++ = TTY_BREAK;
2085 /* added by casper 1/11/2000 */
2086                                         info->icount.brk++;
2087
2088 /* */
2089                                         if (info->flags & ASYNC_SAK)
2090                                                 do_SAK(tty);
2091                                 } else if (*status & UART_LSR_PE) {
2092                                         *fp++ = TTY_PARITY;
2093 /* added by casper 1/11/2000 */
2094                                         info->icount.parity++;
2095 /* */
2096                                 } else if (*status & UART_LSR_FE) {
2097                                         *fp++ = TTY_FRAME;
2098 /* added by casper 1/11/2000 */
2099                                         info->icount.frame++;
2100 /* */
2101                                 } else if (*status & UART_LSR_OE) {
2102                                         *fp++ = TTY_OVERRUN;
2103 /* added by casper 1/11/2000 */
2104                                         info->icount.overrun++;
2105 /* */
2106                                 } else
2107                                         *fp++ = 0;
2108                         } else
2109                                 *fp++ = 0;
2110                         *cp++ = ch;
2111                         cnt++;
2112                         if (cnt >= recv_room) {
2113                                 if (!info->ldisc_stop_rx) {
2114                                         //mxser_throttle(tty);
2115                                         mxser_stoprx(tty);
2116                                 }
2117                                 break;
2118                         }
2119
2120                 }
2121
2122                 // following add by Victor Yu. 09-02-2002
2123                 if (info->IsMoxaMustChipFlag)
2124                         break;
2125                 // above add by Victor Yu. 09-02-2002
2126
2127                 /* mask by Victor Yu. 09-02-2002
2128                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2129                  */
2130                 // following add by Victor Yu. 09-02-2002
2131                 *status = inb(info->base + UART_LSR);
2132                 // above add by Victor Yu. 09-02-2002
2133         } while (*status & UART_LSR_DR);
2134
2135       end_intr:         // add by Victor Yu. 09-02-2002
2136
2137         mxvar_log.rxcnt[info->port] += cnt;
2138         info->mon_data.rxcnt += cnt;
2139         info->mon_data.up_rxcnt += cnt;
2140         spin_unlock_irqrestore(&info->slock, flags);
2141
2142         tty_flip_buffer_push(tty);
2143 }
2144
2145 static void mxser_transmit_chars(struct mxser_struct *info)
2146 {
2147         int count, cnt;
2148         unsigned long flags;
2149
2150         spin_lock_irqsave(&info->slock, flags);
2151
2152         if (info->x_char) {
2153                 outb(info->x_char, info->base + UART_TX);
2154                 info->x_char = 0;
2155                 mxvar_log.txcnt[info->port]++;
2156                 info->mon_data.txcnt++;
2157                 info->mon_data.up_txcnt++;
2158
2159 /* added by casper 1/11/2000 */
2160                 info->icount.tx++;
2161 /* */
2162                 spin_unlock_irqrestore(&info->slock, flags);
2163                 return;
2164         }
2165
2166         if (info->xmit_buf == 0) {
2167                 spin_unlock_irqrestore(&info->slock, flags);
2168                 return;
2169         }
2170
2171         if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2172                 info->IER &= ~UART_IER_THRI;
2173                 outb(info->IER, info->base + UART_IER);
2174                 spin_unlock_irqrestore(&info->slock, flags);
2175                 return;
2176         }
2177
2178         cnt = info->xmit_cnt;
2179         count = info->xmit_fifo_size;
2180         do {
2181                 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2182                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2183                 if (--info->xmit_cnt <= 0)
2184                         break;
2185         } while (--count > 0);
2186         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2187
2188 // added by James 03-12-2004.
2189         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2190         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2191 // (above) added by James.
2192
2193 /* added by casper 1/11/2000 */
2194         info->icount.tx += (cnt - info->xmit_cnt);
2195 /* */
2196
2197         if (info->xmit_cnt < WAKEUP_CHARS) {
2198                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2199                 schedule_work(&info->tqueue);
2200         }
2201         if (info->xmit_cnt <= 0) {
2202                 info->IER &= ~UART_IER_THRI;
2203                 outb(info->IER, info->base + UART_IER);
2204         }
2205         spin_unlock_irqrestore(&info->slock, flags);
2206 }
2207
2208 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2209 {
2210         /* update input line counters */
2211         if (status & UART_MSR_TERI)
2212                 info->icount.rng++;
2213         if (status & UART_MSR_DDSR)
2214                 info->icount.dsr++;
2215         if (status & UART_MSR_DDCD)
2216                 info->icount.dcd++;
2217         if (status & UART_MSR_DCTS)
2218                 info->icount.cts++;
2219         info->mon_data.modem_status = status;
2220         wake_up_interruptible(&info->delta_msr_wait);
2221
2222
2223         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2224                 if (status & UART_MSR_DCD)
2225                         wake_up_interruptible(&info->open_wait);
2226                 schedule_work(&info->tqueue);
2227         }
2228
2229         if (info->flags & ASYNC_CTS_FLOW) {
2230                 if (info->tty->hw_stopped) {
2231                         if (status & UART_MSR_CTS) {
2232                                 info->tty->hw_stopped = 0;
2233
2234                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2235                                         info->IER |= UART_IER_THRI;
2236                                         outb(info->IER, info->base + UART_IER);
2237                                 }
2238                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2239                                 schedule_work(&info->tqueue);                   }
2240                 } else {
2241                         if (!(status & UART_MSR_CTS)) {
2242                                 info->tty->hw_stopped = 1;
2243                                 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2244                                         info->IER &= ~UART_IER_THRI;
2245                                         outb(info->IER, info->base + UART_IER);
2246                                 }
2247                         }
2248                 }
2249         }
2250 }
2251
2252 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2253 {
2254         DECLARE_WAITQUEUE(wait, current);
2255         int retval;
2256         int do_clocal = 0;
2257         unsigned long flags;
2258
2259         /*
2260          * If non-blocking mode is set, or the port is not enabled,
2261          * then make the check up front and then exit.
2262          */
2263         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2264                 info->flags |= ASYNC_NORMAL_ACTIVE;
2265                 return (0);
2266         }
2267
2268         if (tty->termios->c_cflag & CLOCAL)
2269                 do_clocal = 1;
2270
2271         /*
2272          * Block waiting for the carrier detect and the line to become
2273          * free (i.e., not in use by the callout).  While we are in
2274          * this loop, info->count is dropped by one, so that
2275          * mxser_close() knows when to free things.  We restore it upon
2276          * exit, either normal or abnormal.
2277          */
2278         retval = 0;
2279         add_wait_queue(&info->open_wait, &wait);
2280
2281         spin_lock_irqsave(&info->slock, flags);
2282         if (!tty_hung_up_p(filp))
2283                 info->count--;
2284         spin_unlock_irqrestore(&info->slock, flags);
2285         info->blocked_open++;
2286         while (1) {
2287                 spin_lock_irqsave(&info->slock, flags);
2288                 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2289                 spin_unlock_irqrestore(&info->slock, flags);
2290                 set_current_state(TASK_INTERRUPTIBLE);
2291                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2292                         if (info->flags & ASYNC_HUP_NOTIFY)
2293                                 retval = -EAGAIN;
2294                         else
2295                                 retval = -ERESTARTSYS;
2296                         break;
2297                 }
2298                 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2299                         break;
2300                 if (signal_pending(current)) {
2301                         retval = -ERESTARTSYS;
2302                         break;
2303                 }
2304                 schedule();
2305         }
2306         set_current_state(TASK_RUNNING);
2307         remove_wait_queue(&info->open_wait, &wait);
2308         if (!tty_hung_up_p(filp))
2309                 info->count++;
2310         info->blocked_open--;
2311         if (retval)
2312                 return (retval);
2313         info->flags |= ASYNC_NORMAL_ACTIVE;
2314         return (0);
2315 }
2316
2317 static int mxser_startup(struct mxser_struct *info)
2318 {
2319
2320         unsigned long page;
2321         unsigned long flags;
2322
2323         page = __get_free_page(GFP_KERNEL);
2324         if (!page)
2325                 return (-ENOMEM);
2326
2327         spin_lock_irqsave(&info->slock, flags);
2328
2329         if (info->flags & ASYNC_INITIALIZED) {
2330                 free_page(page);
2331                 spin_unlock_irqrestore(&info->slock, flags);
2332                 return (0);
2333         }
2334
2335         if (!info->base || !info->type) {
2336                 if (info->tty)
2337                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2338                 free_page(page);
2339                 spin_unlock_irqrestore(&info->slock, flags);
2340                 return (0);
2341         }
2342         if (info->xmit_buf)
2343                 free_page(page);
2344         else
2345                 info->xmit_buf = (unsigned char *) page;
2346
2347         /*
2348          * Clear the FIFO buffers and disable them
2349          * (they will be reenabled in mxser_change_speed())
2350          */
2351         if (info->IsMoxaMustChipFlag)
2352                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2353         else
2354                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2355
2356         /*
2357          * At this point there's no way the LSR could still be 0xFF;
2358          * if it is, then bail out, because there's likely no UART
2359          * here.
2360          */
2361         if (inb(info->base + UART_LSR) == 0xff) {
2362                 spin_unlock_irqrestore(&info->slock, flags);
2363                 if (capable(CAP_SYS_ADMIN)) {
2364                         if (info->tty)
2365                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2366                         return (0);
2367                 } else
2368                         return (-ENODEV);
2369         }
2370
2371         /*
2372          * Clear the interrupt registers.
2373          */
2374         (void) inb(info->base + UART_LSR);
2375         (void) inb(info->base + UART_RX);
2376         (void) inb(info->base + UART_IIR);
2377         (void) inb(info->base + UART_MSR);
2378
2379         /*
2380          * Now, initialize the UART
2381          */
2382         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2383         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2384         outb(info->MCR, info->base + UART_MCR);
2385
2386         /*
2387          * Finally, enable interrupts
2388          */
2389         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2390 //      info->IER = UART_IER_RLSI | UART_IER_RDI;
2391
2392         // following add by Victor Yu. 08-30-2002
2393         if (info->IsMoxaMustChipFlag)
2394                 info->IER |= MOXA_MUST_IER_EGDAI;
2395         // above add by Victor Yu. 08-30-2002
2396         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2397
2398         /*
2399          * And clear the interrupt registers again for luck.
2400          */
2401         (void) inb(info->base + UART_LSR);
2402         (void) inb(info->base + UART_RX);
2403         (void) inb(info->base + UART_IIR);
2404         (void) inb(info->base + UART_MSR);
2405
2406         if (info->tty)
2407                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2408         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2409
2410         /*
2411          * and set the speed of the serial port
2412          */
2413         spin_unlock_irqrestore(&info->slock, flags);
2414         mxser_change_speed(info, NULL);
2415
2416         info->flags |= ASYNC_INITIALIZED;
2417         return (0);
2418 }
2419
2420 /*
2421  * This routine will shutdown a serial port; interrupts maybe disabled, and
2422  * DTR is dropped if the hangup on close termio flag is on.
2423  */
2424 static void mxser_shutdown(struct mxser_struct *info)
2425 {
2426         unsigned long flags;
2427
2428         if (!(info->flags & ASYNC_INITIALIZED))
2429                 return;
2430
2431         spin_lock_irqsave(&info->slock, flags);
2432
2433         /*
2434          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2435          * here so the queue might never be waken up
2436          */
2437         wake_up_interruptible(&info->delta_msr_wait);
2438
2439         /*
2440          * Free the IRQ, if necessary
2441          */
2442         if (info->xmit_buf) {
2443                 free_page((unsigned long) info->xmit_buf);
2444                 info->xmit_buf = NULL;
2445         }
2446
2447         info->IER = 0;
2448         outb(0x00, info->base + UART_IER);
2449
2450         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2451                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2452         outb(info->MCR, info->base + UART_MCR);
2453
2454         /* clear Rx/Tx FIFO's */
2455         // following add by Victor Yu. 08-30-2002
2456         if (info->IsMoxaMustChipFlag)
2457                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2458         else
2459                 // above add by Victor Yu. 08-30-2002
2460                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2461
2462         /* read data port to reset things */
2463         (void) inb(info->base + UART_RX);
2464
2465         if (info->tty)
2466                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2467
2468         info->flags &= ~ASYNC_INITIALIZED;
2469
2470         // following add by Victor Yu. 09-23-2002
2471         if (info->IsMoxaMustChipFlag) {
2472                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2473         }
2474         // above add by Victor Yu. 09-23-2002
2475
2476         spin_unlock_irqrestore(&info->slock, flags);
2477 }
2478
2479 /*
2480  * This routine is called to set the UART divisor registers to match
2481  * the specified baud rate for a serial port.
2482  */
2483 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2484 {
2485         unsigned cflag, cval, fcr;
2486         int ret = 0;
2487         unsigned char status;
2488         long baud;
2489         unsigned long flags;
2490
2491
2492         if (!info->tty || !info->tty->termios)
2493                 return ret;
2494         cflag = info->tty->termios->c_cflag;
2495         if (!(info->base))
2496                 return ret;
2497
2498
2499 #ifndef B921600
2500 #define B921600 (B460800 +1)
2501 #endif
2502         if (mxser_set_baud_method[info->port] == 0) {
2503                 switch (cflag & (CBAUD | CBAUDEX)) {
2504                 case B921600:
2505                         baud = 921600;
2506                         break;
2507                 case B460800:
2508                         baud = 460800;
2509                         break;
2510                 case B230400:
2511                         baud = 230400;
2512                         break;
2513                 case B115200:
2514                         baud = 115200;
2515                         break;
2516                 case B57600:
2517                         baud = 57600;
2518                         break;
2519                 case B38400:
2520                         baud = 38400;
2521                         break;
2522                 case B19200:
2523                         baud = 19200;
2524                         break;
2525                 case B9600:
2526                         baud = 9600;
2527                         break;
2528                 case B4800:
2529                         baud = 4800;
2530                         break;
2531                 case B2400:
2532                         baud = 2400;
2533                         break;
2534                 case B1800:
2535                         baud = 1800;
2536                         break;
2537                 case B1200:
2538                         baud = 1200;
2539                         break;
2540                 case B600:
2541                         baud = 600;
2542                         break;
2543                 case B300:
2544                         baud = 300;
2545                         break;
2546                 case B200:
2547                         baud = 200;
2548                         break;
2549                 case B150:
2550                         baud = 150;
2551                         break;
2552                 case B134:
2553                         baud = 134;
2554                         break;
2555                 case B110:
2556                         baud = 110;
2557                         break;
2558                 case B75:
2559                         baud = 75;
2560                         break;
2561                 case B50:
2562                         baud = 50;
2563                         break;
2564                 default:
2565                         baud = 0;
2566                         break;
2567                 }
2568                 mxser_set_baud(info, baud);
2569         }
2570
2571         /* byte size and parity */
2572         switch (cflag & CSIZE) {
2573         case CS5:
2574                 cval = 0x00;
2575                 break;
2576         case CS6:
2577                 cval = 0x01;
2578                 break;
2579         case CS7:
2580                 cval = 0x02;
2581                 break;
2582         case CS8:
2583                 cval = 0x03;
2584                 break;
2585         default:
2586                 cval = 0x00;
2587                 break;          /* too keep GCC shut... */
2588         }
2589         if (cflag & CSTOPB)
2590                 cval |= 0x04;
2591         if (cflag & PARENB)
2592                 cval |= UART_LCR_PARITY;
2593         if (!(cflag & PARODD)) {
2594                 cval |= UART_LCR_EPAR;
2595         }
2596         if (cflag & CMSPAR)
2597                 cval |= UART_LCR_SPAR;
2598
2599         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2600                 if (info->IsMoxaMustChipFlag) {
2601                         fcr = UART_FCR_ENABLE_FIFO;
2602                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2603                         SET_MOXA_MUST_FIFO_VALUE(info);
2604                 } else
2605                         fcr = 0;
2606         } else {
2607                 fcr = UART_FCR_ENABLE_FIFO;
2608                 // following add by Victor Yu. 08-30-2002
2609                 if (info->IsMoxaMustChipFlag) {
2610                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2611                         SET_MOXA_MUST_FIFO_VALUE(info);
2612                 } else {
2613                         // above add by Victor Yu. 08-30-2002
2614
2615                         switch (info->rx_trigger) {
2616                         case 1:
2617                                 fcr |= UART_FCR_TRIGGER_1;
2618                                 break;
2619                         case 4:
2620                                 fcr |= UART_FCR_TRIGGER_4;
2621                                 break;
2622                         case 8:
2623                                 fcr |= UART_FCR_TRIGGER_8;
2624                                 break;
2625                         default:
2626                                 fcr |= UART_FCR_TRIGGER_14;
2627                                 break;
2628                         }
2629                 }
2630         }
2631
2632         /* CTS flow control flag and modem status interrupts */
2633         info->IER &= ~UART_IER_MSI;
2634         info->MCR &= ~UART_MCR_AFE;
2635         if (cflag & CRTSCTS) {
2636                 info->flags |= ASYNC_CTS_FLOW;
2637                 info->IER |= UART_IER_MSI;
2638                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2639                         info->MCR |= UART_MCR_AFE;
2640                         //status = mxser_get_msr(info->base, 0, info->port);
2641 /*      save_flags(flags);
2642         cli();
2643         status = inb(baseaddr + UART_MSR);
2644         restore_flags(flags);*/
2645                         //mxser_check_modem_status(info, status);
2646                 } else {
2647                         //status = mxser_get_msr(info->base, 0, info->port);
2648
2649                         //MX_LOCK(&info->slock);
2650                         status = inb(info->base + UART_MSR);
2651                         //MX_UNLOCK(&info->slock);
2652                         if (info->tty->hw_stopped) {
2653                                 if (status & UART_MSR_CTS) {
2654                                         info->tty->hw_stopped = 0;
2655                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2656                                                 info->IER |= UART_IER_THRI;
2657                                                 outb(info->IER, info->base + UART_IER);
2658                                         }
2659                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2660                                         schedule_work(&info->tqueue);                           }
2661                         } else {
2662                                 if (!(status & UART_MSR_CTS)) {
2663                                         info->tty->hw_stopped = 1;
2664                                         if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2665                                                 info->IER &= ~UART_IER_THRI;
2666                                                 outb(info->IER, info->base + UART_IER);
2667                                         }
2668                                 }
2669                         }
2670                 }
2671         } else {
2672                 info->flags &= ~ASYNC_CTS_FLOW;
2673         }
2674         outb(info->MCR, info->base + UART_MCR);
2675         if (cflag & CLOCAL) {
2676                 info->flags &= ~ASYNC_CHECK_CD;
2677         } else {
2678                 info->flags |= ASYNC_CHECK_CD;
2679                 info->IER |= UART_IER_MSI;
2680         }
2681         outb(info->IER, info->base + UART_IER);
2682
2683         /*
2684          * Set up parity check flag
2685          */
2686         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2687         if (I_INPCK(info->tty))
2688                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2689         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2690                 info->read_status_mask |= UART_LSR_BI;
2691
2692         info->ignore_status_mask = 0;
2693
2694         if (I_IGNBRK(info->tty)) {
2695                 info->ignore_status_mask |= UART_LSR_BI;
2696                 info->read_status_mask |= UART_LSR_BI;
2697                 /*
2698                  * If we're ignore parity and break indicators, ignore
2699                  * overruns too.  (For real raw support).
2700                  */
2701                 if (I_IGNPAR(info->tty)) {
2702                         info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2703                         info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2704                 }
2705         }
2706         // following add by Victor Yu. 09-02-2002
2707         if (info->IsMoxaMustChipFlag) {
2708                 spin_lock_irqsave(&info->slock, flags);
2709                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2710                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2711                 if (I_IXON(info->tty)) {
2712                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2713                 } else {
2714                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2715                 }
2716                 if (I_IXOFF(info->tty)) {
2717                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2718                 } else {
2719                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2720                 }
2721                 /*
2722                    if ( I_IXANY(info->tty) ) {
2723                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2724                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2725                    } else {
2726                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2727                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2728                    }
2729                  */
2730                 spin_unlock_irqrestore(&info->slock, flags);
2731         }
2732         // above add by Victor Yu. 09-02-2002
2733
2734
2735         outb(fcr, info->base + UART_FCR);       /* set fcr */
2736         outb(cval, info->base + UART_LCR);
2737
2738         return ret;
2739 }
2740
2741
2742 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2743 {
2744         int quot = 0;
2745         unsigned char cval;
2746         int ret = 0;
2747         unsigned long flags;
2748
2749         if (!info->tty || !info->tty->termios)
2750                 return ret;
2751
2752         if (!(info->base))
2753                 return ret;
2754
2755         if (newspd > info->MaxCanSetBaudRate)
2756                 return 0;
2757
2758         info->realbaud = newspd;
2759         if (newspd == 134) {
2760                 quot = (2 * info->baud_base / 269);
2761         } else if (newspd) {
2762                 quot = info->baud_base / newspd;
2763
2764                 if (quot == 0)
2765                         quot = 1;
2766
2767         } else {
2768                 quot = 0;
2769         }
2770
2771         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2772         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2773
2774         if (quot) {
2775                 spin_lock_irqsave(&info->slock, flags);
2776                 info->MCR |= UART_MCR_DTR;
2777                 outb(info->MCR, info->base + UART_MCR);
2778                 spin_unlock_irqrestore(&info->slock, flags);
2779         } else {
2780                 spin_lock_irqsave(&info->slock, flags);
2781                 info->MCR &= ~UART_MCR_DTR;
2782                 outb(info->MCR, info->base + UART_MCR);
2783                 spin_unlock_irqrestore(&info->slock, flags);
2784                 return ret;
2785         }
2786
2787         cval = inb(info->base + UART_LCR);
2788
2789         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2790
2791         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2792         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2793         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2794
2795
2796         return ret;
2797 }
2798
2799
2800
2801 /*
2802  * ------------------------------------------------------------
2803  * friends of mxser_ioctl()
2804  * ------------------------------------------------------------
2805  */
2806 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2807 {
2808         struct serial_struct tmp;
2809
2810         if (!retinfo)
2811                 return (-EFAULT);
2812         memset(&tmp, 0, sizeof(tmp));
2813         tmp.type = info->type;
2814         tmp.line = info->port;
2815         tmp.port = info->base;
2816         tmp.irq = info->irq;
2817         tmp.flags = info->flags;
2818         tmp.baud_base = info->baud_base;
2819         tmp.close_delay = info->close_delay;
2820         tmp.closing_wait = info->closing_wait;
2821         tmp.custom_divisor = info->custom_divisor;
2822         tmp.hub6 = 0;
2823         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2824                 return -EFAULT;
2825         return (0);
2826 }
2827
2828 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2829 {
2830         struct serial_struct new_serial;
2831         unsigned int flags;
2832         int retval = 0;
2833
2834         if (!new_info || !info->base)
2835                 return (-EFAULT);
2836         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2837                 return -EFAULT;
2838
2839         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))
2840                 return (-EPERM);
2841
2842         flags = info->flags & ASYNC_SPD_MASK;
2843
2844         if (!capable(CAP_SYS_ADMIN)) {
2845                 if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2846                         return (-EPERM);
2847                 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2848         } else {
2849                 /*
2850                  * OK, past this point, all the error checking has been done.
2851                  * At this point, we start making changes.....
2852                  */
2853                 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2854                 info->close_delay = new_serial.close_delay * HZ / 100;
2855                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2856                 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2857                 info->tty->low_latency = 0;     //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2858         }
2859
2860         /* added by casper, 3/17/2000, for mouse */
2861         info->type = new_serial.type;
2862
2863         process_txrx_fifo(info);
2864
2865         /* */
2866         if (info->flags & ASYNC_INITIALIZED) {
2867                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2868                         mxser_change_speed(info, NULL);
2869                 }
2870         } else {
2871                 retval = mxser_startup(info);
2872         }
2873         return (retval);
2874 }
2875
2876 /*
2877  * mxser_get_lsr_info - get line status register info
2878  *
2879  * Purpose: Let user call ioctl() to get info when the UART physically
2880  *          is emptied.  On bus types like RS485, the transmitter must
2881  *          release the bus after transmitting. This must be done when
2882  *          the transmit shift register is empty, not be done when the
2883  *          transmit holding register is empty.  This functionality
2884  *          allows an RS485 driver to be written in user space.
2885  */
2886 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2887 {
2888         unsigned char status;
2889         unsigned int result;
2890         unsigned long flags;
2891
2892         spin_lock_irqsave(&info->slock, flags);
2893         status = inb(info->base + UART_LSR);
2894         spin_unlock_irqrestore(&info->slock, flags);
2895         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2896         return put_user(result, value);
2897 }
2898
2899 /*
2900  * This routine sends a break character out the serial port.
2901  */
2902 static void mxser_send_break(struct mxser_struct *info, int duration)
2903 {
2904         unsigned long flags;
2905
2906         if (!info->base)
2907                 return;
2908         set_current_state(TASK_INTERRUPTIBLE);
2909         spin_lock_irqsave(&info->slock, flags);
2910         outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2911         spin_unlock_irqrestore(&info->slock, flags);
2912         schedule_timeout(duration);
2913         spin_lock_irqsave(&info->slock, flags);
2914         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2915         spin_unlock_irqrestore(&info->slock, flags);
2916 }
2917
2918 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2919 {
2920         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2921         unsigned char control, status;
2922         unsigned long flags;
2923
2924
2925         if (tty->index == MXSER_PORTS)
2926                 return (-ENOIOCTLCMD);
2927         if (tty->flags & (1 << TTY_IO_ERROR))
2928                 return (-EIO);
2929
2930         control = info->MCR;
2931
2932         spin_lock_irqsave(&info->slock, flags);
2933         status = inb(info->base + UART_MSR);
2934         if (status & UART_MSR_ANY_DELTA)
2935                 mxser_check_modem_status(info, status);
2936         spin_unlock_irqrestore(&info->slock, flags);
2937         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2938             ((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);
2939 }
2940
2941 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2942 {
2943         struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2944         unsigned long flags;
2945
2946
2947         if (tty->index == MXSER_PORTS)
2948                 return -ENOIOCTLCMD;
2949         if (tty->flags & (1 << TTY_IO_ERROR))
2950                 return -EIO;
2951
2952         spin_lock_irqsave(&info->slock, flags);
2953
2954         if (set & TIOCM_RTS)
2955                 info->MCR |= UART_MCR_RTS;
2956         if (set & TIOCM_DTR)
2957                 info->MCR |= UART_MCR_DTR;
2958
2959         if (clear & TIOCM_RTS)
2960                 info->MCR &= ~UART_MCR_RTS;
2961         if (clear & TIOCM_DTR)
2962                 info->MCR &= ~UART_MCR_DTR;
2963
2964         outb(info->MCR, info->base + UART_MCR);
2965         spin_unlock_irqrestore(&info->slock, flags);
2966         return 0;
2967 }
2968
2969
2970 static int mxser_read_register(int, unsigned short *);
2971 static int mxser_program_mode(int);
2972 static void mxser_normal_mode(int);
2973
2974 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2975 {
2976         int id, i, bits;
2977         unsigned short regs[16], irq;
2978         unsigned char scratch, scratch2;
2979
2980         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2981
2982         id = mxser_read_register(cap, regs);
2983         if (id == C168_ASIC_ID) {
2984                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2985                 hwconf->ports = 8;
2986         } else if (id == C104_ASIC_ID) {
2987                 hwconf->board_type = MXSER_BOARD_C104_ISA;
2988                 hwconf->ports = 4;
2989         } else if (id == C102_ASIC_ID) {
2990                 hwconf->board_type = MXSER_BOARD_C102_ISA;
2991                 hwconf->ports = 2;
2992         } else if (id == CI132_ASIC_ID) {
2993                 hwconf->board_type = MXSER_BOARD_CI132;
2994                 hwconf->ports = 2;
2995         } else if (id == CI134_ASIC_ID) {
2996                 hwconf->board_type = MXSER_BOARD_CI134;
2997                 hwconf->ports = 4;
2998         } else if (id == CI104J_ASIC_ID) {
2999                 hwconf->board_type = MXSER_BOARD_CI104J;
3000                 hwconf->ports = 4;
3001         } else
3002                 return (0);
3003
3004         irq = 0;
3005         if (hwconf->ports == 2) {
3006                 irq = regs[9] & 0xF000;
3007                 irq = irq | (irq >> 4);
3008                 if (irq != (regs[9] & 0xFF00))
3009                         return (MXSER_ERR_IRQ_CONFLIT);
3010         } else if (hwconf->ports == 4) {
3011                 irq = regs[9] & 0xF000;
3012                 irq = irq | (irq >> 4);
3013                 irq = irq | (irq >> 8);
3014                 if (irq != regs[9])
3015                         return (MXSER_ERR_IRQ_CONFLIT);
3016         } else if (hwconf->ports == 8) {
3017                 irq = regs[9] & 0xF000;
3018                 irq = irq | (irq >> 4);
3019                 irq = irq | (irq >> 8);
3020                 if ((irq != regs[9]) || (irq != regs[10]))
3021                         return (MXSER_ERR_IRQ_CONFLIT);
3022         }
3023
3024         if (!irq) {
3025                 return (MXSER_ERR_IRQ);
3026         }
3027         hwconf->irq = ((int) (irq & 0xF000) >> 12);
3028         for (i = 0; i < 8; i++)
3029                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3030         if ((regs[12] & 0x80) == 0) {
3031                 return (MXSER_ERR_VECTOR);
3032         }
3033         hwconf->vector = (int) regs[11];        /* interrupt vector */
3034         if (id == 1)
3035                 hwconf->vector_mask = 0x00FF;
3036         else
3037                 hwconf->vector_mask = 0x000F;
3038         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3039                 if (regs[12] & bits) {
3040                         hwconf->baud_base[i] = 921600;
3041                         hwconf->MaxCanSetBaudRate[i] = 921600;  // add by Victor Yu. 09-04-2002
3042                 } else {
3043                         hwconf->baud_base[i] = 115200;
3044                         hwconf->MaxCanSetBaudRate[i] = 115200;  // add by Victor Yu. 09-04-2002
3045                 }
3046         }
3047         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3048         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3049         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3050         outb(scratch2, cap + UART_LCR);
3051         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3052         scratch = inb(cap + UART_IIR);
3053
3054         if (scratch & 0xC0)
3055                 hwconf->uart_type = PORT_16550A;
3056         else
3057                 hwconf->uart_type = PORT_16450;
3058         if (id == 1)
3059                 hwconf->ports = 8;
3060         else
3061                 hwconf->ports = 4;
3062         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3063         request_region(hwconf->vector, 1, "mxser(vector)");
3064         return (hwconf->ports);
3065 }
3066
3067 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3068 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3069 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3070 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3071 #define EN_CCMD         0x000   /* Chip's command register     */
3072 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3073 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3074 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3075 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3076 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3077 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3078 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3079 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3080 static int mxser_read_register(int port, unsigned short *regs)
3081 {
3082         int i, k, value, id;
3083         unsigned int j;
3084
3085         id = mxser_program_mode(port);
3086         if (id < 0)
3087                 return (id);
3088         for (i = 0; i < 14; i++) {
3089                 k = (i & 0x3F) | 0x180;
3090                 for (j = 0x100; j > 0; j >>= 1) {
3091                         outb(CHIP_CS, port);
3092                         if (k & j) {
3093                                 outb(CHIP_CS | CHIP_DO, port);
3094                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3095                         } else {
3096                                 outb(CHIP_CS, port);
3097                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3098                         }
3099                 }
3100                 (void) inb(port);
3101                 value = 0;
3102                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3103                         outb(CHIP_CS, port);
3104                         outb(CHIP_CS | CHIP_SK, port);
3105                         if (inb(port) & CHIP_DI)
3106                                 value |= j;
3107                 }
3108                 regs[i] = value;
3109                 outb(0, port);
3110         }
3111         mxser_normal_mode(port);
3112         return (id);
3113 }
3114
3115 static int mxser_program_mode(int port)
3116 {
3117         int id, i, j, n;
3118         //unsigned long flags;
3119
3120         spin_lock(&gm_lock);
3121         outb(0, port);
3122         outb(0, port);
3123         outb(0, port);
3124         (void) inb(port);
3125         (void) inb(port);
3126         outb(0, port);
3127         (void) inb(port);
3128         //restore_flags(flags);
3129         spin_unlock(&gm_lock);
3130
3131         id = inb(port + 1) & 0x1F;
3132         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))
3133                 return (-1);
3134         for (i = 0, j = 0; i < 4; i++) {
3135                 n = inb(port + 2);
3136                 if (n == 'M') {
3137                         j = 1;
3138                 } else if ((j == 1) && (n == 1)) {
3139                         j = 2;
3140                         break;
3141                 } else
3142                         j = 0;
3143         }
3144         if (j != 2)
3145                 id = -2;
3146         return (id);
3147 }
3148
3149 static void mxser_normal_mode(int port)
3150 {
3151         int i, n;
3152
3153         outb(0xA5, port + 1);
3154         outb(0x80, port + 3);
3155         outb(12, port + 0);     /* 9600 bps */
3156         outb(0, port + 1);
3157         outb(0x03, port + 3);   /* 8 data bits */
3158         outb(0x13, port + 4);   /* loop back mode */
3159         for (i = 0; i < 16; i++) {
3160                 n = inb(port + 5);
3161                 if ((n & 0x61) == 0x60)
3162                         break;
3163                 if ((n & 1) == 1)
3164                         (void) inb(port);
3165         }
3166         outb(0x00, port + 4);
3167 }
3168
3169 module_init(mxser_module_init);
3170 module_exit(mxser_module_exit);