git.oblomov.eu Git - linux-2.6/blob - drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2001  Moxa Technologies (support@moxa.com.tw).
   5  *
   6  *      This code is loosely based on the Linux serial driver, written by
   7  *      Linus Torvalds, Theodore T'so and others.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *      Original release        10/26/00
  24  *
  25  *      02/06/01        Support MOXA Industio family boards.
  26  *      02/06/01        Support TIOCGICOUNT.
  27  *      02/06/01        Fix the problem for connecting to serial mouse.
  28  *      02/06/01        Fix the problem for H/W flow control.
  29  *      02/06/01        Fix the compling warning when CONFIG_PCI
  30  *                      don't be defined.
  31  *
  32  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  33  *      <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
  34  *      - Fixed x86_64 cleanness
  35  *      - Fixed sleep with spinlock held in mxser_send_break
  36  */
  37
  38
  39 #include <linux/module.h>
  40 #include <linux/autoconf.h>
  41 #include <linux/errno.h>
  42 #include <linux/signal.h>
  43 #include <linux/sched.h>
  44 #include <linux/timer.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/tty.h>
  47 #include <linux/tty_flip.h>
  48 #include <linux/serial.h>
  49 #include <linux/serial_reg.h>
  50 #include <linux/major.h>
  51 #include <linux/string.h>
  52 #include <linux/fcntl.h>
  53 #include <linux/ptrace.h>
  54 #include <linux/gfp.h>
  55 #include <linux/ioport.h>
  56 #include <linux/mm.h>
  57 #include <linux/smp_lock.h>
  58 #include <linux/delay.h>
  59 #include <linux/pci.h>
  60
  61 #include <asm/system.h>
  62 #include <asm/io.h>
  63 #include <asm/irq.h>
  64 #include <asm/bitops.h>
  65 #include <asm/uaccess.h>
  66
  67 #include "mxser.h"
  68
  69 #define MXSER_VERSION   "1.8"
  70 #define MXSERMAJOR       174
  71 #define MXSERCUMAJOR     175
  72
  73 #define MXSER_EVENT_TXLOW       1
  74 #define MXSER_EVENT_HANGUP      2
  75
  76 #define MXSER_BOARDS            4       /* Max. boards */
  77 #define MXSER_PORTS             32      /* Max. ports */
  78 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  79 #define MXSER_ISR_PASS_LIMIT    256
  80
  81 #define MXSER_ERR_IOADDR        -1
  82 #define MXSER_ERR_IRQ           -2
  83 #define MXSER_ERR_IRQ_CONFLIT   -3
  84 #define MXSER_ERR_VECTOR        -4
  85
  86 #define SERIAL_TYPE_NORMAL      1
  87 #define SERIAL_TYPE_CALLOUT     2
  88
  89 #define WAKEUP_CHARS            256
  90
  91 #define UART_MCR_AFE            0x20
  92 #define UART_LSR_SPECIAL        0x1E
  93
  94 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
  95                                           IXON|IXOFF))
  96
  97 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
  98
  99 #define C168_ASIC_ID    1
 100 #define C104_ASIC_ID    2
 101 #define C102_ASIC_ID    0xB
 102 #define CI132_ASIC_ID   4
 103 #define CI134_ASIC_ID   3
 104 #define CI104J_ASIC_ID  5
 105
 106 enum {
 107         MXSER_BOARD_C168_ISA = 1,
 108         MXSER_BOARD_C104_ISA,
 109         MXSER_BOARD_CI104J,
 110         MXSER_BOARD_C168_PCI,
 111         MXSER_BOARD_C104_PCI,
 112         MXSER_BOARD_C102_ISA,
 113         MXSER_BOARD_CI132,
 114         MXSER_BOARD_CI134,
 115         MXSER_BOARD_CP132,
 116         MXSER_BOARD_CP114,
 117         MXSER_BOARD_CT114,
 118         MXSER_BOARD_CP102,
 119         MXSER_BOARD_CP104U,
 120         MXSER_BOARD_CP168U,
 121         MXSER_BOARD_CP132U,
 122         MXSER_BOARD_CP134U,
 123         MXSER_BOARD_CP104JU,
 124         MXSER_BOARD_RC7000,
 125         MXSER_BOARD_CP118U,
 126         MXSER_BOARD_CP102UL,
 127         MXSER_BOARD_CP102U,
 128 };
 129
 130 static char *mxser_brdname[] = {
 131         "C168 series",
 132         "C104 series",
 133         "CI-104J series",
 134         "C168H/PCI series",
 135         "C104H/PCI series",
 136         "C102 series",
 137         "CI-132 series",
 138         "CI-134 series",
 139         "CP-132 series",
 140         "CP-114 series",
 141         "CT-114 series",
 142         "CP-102 series",
 143         "CP-104U series",
 144         "CP-168U series",
 145         "CP-132U series",
 146         "CP-134U series",
 147         "CP-104JU series",
 148         "Moxa UC7000 Serial",
 149         "CP-118U series",
 150         "CP-102UL series",
 151         "CP-102U series",
 152 };
 153
 154 static int mxser_numports[] = {
 155         8,                      /* C168-ISA */
 156         4,                      /* C104-ISA */
 157         4,                      /* CI104J */
 158         8,                      /* C168-PCI */
 159         4,                      /* C104-PCI */
 160         2,                      /* C102-ISA */
 161         2,                      /* CI132 */
 162         4,                      /* CI134 */
 163         2,                      /* CP132 */
 164         4,                      /* CP114 */
 165         4,                      /* CT114 */
 166         2,                      /* CP102 */
 167         4,                      /* CP104U */
 168         8,                      /* CP168U */
 169         2,                      /* CP132U */
 170         4,                      /* CP134U */
 171         4,                      /* CP104JU */
 172         8,                      /* RC7000 */
 173         8,                      /* CP118U */
 174         2,                      /* CP102UL */
 175         2,                      /* CP102U */
 176 };
 177
 178 #define UART_TYPE_NUM   2
 179
 180 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
 181         MOXA_MUST_MU150_HWID,
 182         MOXA_MUST_MU860_HWID
 183 };
 184
 185 /* This is only for PCI */
 186 #define UART_INFO_NUM   3
 187 struct mxpciuart_info {
 188         int type;
 189         int tx_fifo;
 190         int rx_fifo;
 191         int xmit_fifo_size;
 192         int rx_high_water;
 193         int rx_trigger;
 194         int rx_low_water;
 195         long max_baud;
 196 };
 197
 198 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
 199         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 200         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 201         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 202 };
 203
 204
 205 #ifdef CONFIG_PCI
 206
 207 static struct pci_device_id mxser_pcibrds[] = {
 208         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
 209         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
 210         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
 211         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
 212         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
 213         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
 214         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
 215         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
 216         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
 217         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
 218         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
 219         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
 220         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
 221         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
 222         {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
 223         {0}
 224 };
 225
 226 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 227
 228
 229 #endif
 230
 231 typedef struct _moxa_pci_info {
 232         unsigned short busNum;
 233         unsigned short devNum;
 234         struct pci_dev *pdev;   /* add by Victor Yu. 06-23-2003 */
 235 } moxa_pci_info;
 236
 237 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
 238 static int ttymajor = MXSERMAJOR;
 239 static int calloutmajor = MXSERCUMAJOR;
 240 static int verbose = 0;
 241
 242 /* Variables for insmod */
 243
 244 MODULE_AUTHOR("Casper Yang");
 245 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 246 module_param_array(ioaddr, int, NULL, 0);
 247 module_param(ttymajor, int, 0);
 248 module_param(calloutmajor, int, 0);
 249 module_param(verbose, bool, 0);
 250 MODULE_LICENSE("GPL");
 251
 252 struct mxser_log {
 253         int tick;
 254         unsigned long rxcnt[MXSER_PORTS];
 255         unsigned long txcnt[MXSER_PORTS];
 256 };
 257
 258
 259 struct mxser_mon {
 260         unsigned long rxcnt;
 261         unsigned long txcnt;
 262         unsigned long up_rxcnt;
 263         unsigned long up_txcnt;
 264         int modem_status;
 265         unsigned char hold_reason;
 266 };
 267
 268 struct mxser_mon_ext {
 269         unsigned long rx_cnt[32];
 270         unsigned long tx_cnt[32];
 271         unsigned long up_rxcnt[32];
 272         unsigned long up_txcnt[32];
 273         int modem_status[32];
 274
 275         long baudrate[32];
 276         int databits[32];
 277         int stopbits[32];
 278         int parity[32];
 279         int flowctrl[32];
 280         int fifo[32];
 281         int iftype[32];
 282 };
 283
 284 struct mxser_hwconf {
 285         int board_type;
 286         int ports;
 287         int irq;
 288         int vector;
 289         int vector_mask;
 290         int uart_type;
 291         int ioaddr[MXSER_PORTS_PER_BOARD];
 292         int baud_base[MXSER_PORTS_PER_BOARD];
 293         moxa_pci_info pciInfo;
 294         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 295         int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];   /* add by Victor Yu. 09-04-2002 */
 296         int opmode_ioaddr[MXSER_PORTS_PER_BOARD];       /* add by Victor Yu. 01-05-2004 */
 297 };
 298
 299 struct mxser_struct {
 300         int port;
 301         int base;               /* port base address */
 302         int irq;                /* port using irq no. */
 303         int vector;             /* port irq vector */
 304         int vectormask;         /* port vector mask */
 305         int rx_high_water;
 306         int rx_trigger;         /* Rx fifo trigger level */
 307         int rx_low_water;
 308         int baud_base;          /* max. speed */
 309         int flags;              /* defined in tty.h */
 310         int type;               /* UART type */
 311         struct tty_struct *tty;
 312         int read_status_mask;
 313         int ignore_status_mask;
 314         int xmit_fifo_size;
 315         int custom_divisor;
 316         int x_char;             /* xon/xoff character */
 317         int close_delay;
 318         unsigned short closing_wait;
 319         int IER;                /* Interrupt Enable Register */
 320         int MCR;                /* Modem control register */
 321         unsigned long event;
 322         int count;              /* # of fd on device */
 323         int blocked_open;       /* # of blocked opens */
 324         long session;           /* Session of opening process */
 325         long pgrp;              /* pgrp of opening process */
 326         unsigned char *xmit_buf;
 327         int xmit_head;
 328         int xmit_tail;
 329         int xmit_cnt;
 330         struct work_struct tqueue;
 331         struct ktermios normal_termios;
 332         struct ktermios callout_termios;
 333         wait_queue_head_t open_wait;
 334         wait_queue_head_t close_wait;
 335         wait_queue_head_t delta_msr_wait;
 336         struct async_icount icount;     /* kernel counters for the 4 input interrupts */
 337         int timeout;
 338         int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
 339         int MaxCanSetBaudRate;  /* add by Victor Yu. 09-04-2002 */
 340         int opmode_ioaddr;      /* add by Victor Yu. 01-05-2004 */
 341         unsigned char stop_rx;
 342         unsigned char ldisc_stop_rx;
 343         long realbaud;
 344         struct mxser_mon mon_data;
 345         unsigned char err_shadow;
 346         spinlock_t slock;
 347 };
 348
 349 struct mxser_mstatus {
 350         tcflag_t cflag;
 351         int cts;
 352         int dsr;
 353         int ri;
 354         int dcd;
 355 };
 356
 357 static struct mxser_mstatus GMStatus[MXSER_PORTS];
 358
 359 static int mxserBoardCAP[MXSER_BOARDS] = {
 360         0, 0, 0, 0
 361         /*  0x180, 0x280, 0x200, 0x320 */
 362 };
 363
 364 static struct tty_driver *mxvar_sdriver;
 365 static struct mxser_struct mxvar_table[MXSER_PORTS];
 366 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
 367 static struct ktermios *mxvar_termios[MXSER_PORTS + 1];
 368 static struct ktermios *mxvar_termios_locked[MXSER_PORTS + 1];
 369 static struct mxser_log mxvar_log;
 370 static int mxvar_diagflag;
 371 static unsigned char mxser_msr[MXSER_PORTS + 1];
 372 static struct mxser_mon_ext mon_data_ext;
 373 static int mxser_set_baud_method[MXSER_PORTS + 1];
 374 static spinlock_t gm_lock;
 375
 376 /*
 377  * This is used to figure out the divisor speeds and the timeouts
 378  */
 379
 380 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
 381
 382 /*
 383  * static functions:
 384  */
 385
 386 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
 387 static int mxser_init(void);
 388
 389 /* static void   mxser_poll(unsigned long); */
 390 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
 391 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
 392 static void mxser_do_softint(struct work_struct *);
 393 static int mxser_open(struct tty_struct *, struct file *);
 394 static void mxser_close(struct tty_struct *, struct file *);
 395 static int mxser_write(struct tty_struct *, const unsigned char *, int);
 396 static int mxser_write_room(struct tty_struct *);
 397 static void mxser_flush_buffer(struct tty_struct *);
 398 static int mxser_chars_in_buffer(struct tty_struct *);
 399 static void mxser_flush_chars(struct tty_struct *);
 400 static void mxser_put_char(struct tty_struct *, unsigned char);
 401 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
 402 static int mxser_ioctl_special(unsigned int, void __user *);
 403 static void mxser_throttle(struct tty_struct *);
 404 static void mxser_unthrottle(struct tty_struct *);
 405 static void mxser_set_termios(struct tty_struct *, struct ktermios *);
 406 static void mxser_stop(struct tty_struct *);
 407 static void mxser_start(struct tty_struct *);
 408 static void mxser_hangup(struct tty_struct *);
 409 static void mxser_rs_break(struct tty_struct *, int);
 410 static irqreturn_t mxser_interrupt(int, void *);
 411 static void mxser_receive_chars(struct mxser_struct *, int *);
 412 static void mxser_transmit_chars(struct mxser_struct *);
 413 static void mxser_check_modem_status(struct mxser_struct *, int);
 414 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
 415 static int mxser_startup(struct mxser_struct *);
 416 static void mxser_shutdown(struct mxser_struct *);
 417 static int mxser_change_speed(struct mxser_struct *, struct ktermios *old_termios);
 418 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
 419 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
 420 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
 421 static void mxser_send_break(struct mxser_struct *, int);
 422 static int mxser_tiocmget(struct tty_struct *, struct file *);
 423 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
 424 static int mxser_set_baud(struct mxser_struct *info, long newspd);
 425 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
 426
 427 static void mxser_startrx(struct tty_struct *tty);
 428 static void mxser_stoprx(struct tty_struct *tty);
 429
 430
 431 static int CheckIsMoxaMust(int io)
 432 {
 433         u8 oldmcr, hwid;
 434         int i;
 435
 436         outb(0, io + UART_LCR);
 437         DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
 438         oldmcr = inb(io + UART_MCR);
 439         outb(0, io + UART_MCR);
 440         SET_MOXA_MUST_XON1_VALUE(io, 0x11);
 441         if ((hwid = inb(io + UART_MCR)) != 0) {
 442                 outb(oldmcr, io + UART_MCR);
 443                 return MOXA_OTHER_UART;
 444         }
 445
 446         GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
 447         for (i = 0; i < UART_TYPE_NUM; i++) {
 448                 if (hwid == Gmoxa_uart_id[i])
 449                         return (int)hwid;
 450         }
 451         return MOXA_OTHER_UART;
 452 }
 453
 454 /* above is modified by Victor Yu. 08-15-2002 */
 455
 456 static const struct tty_operations mxser_ops = {
 457         .open = mxser_open,
 458         .close = mxser_close,
 459         .write = mxser_write,
 460         .put_char = mxser_put_char,
 461         .flush_chars = mxser_flush_chars,
 462         .write_room = mxser_write_room,
 463         .chars_in_buffer = mxser_chars_in_buffer,
 464         .flush_buffer = mxser_flush_buffer,
 465         .ioctl = mxser_ioctl,
 466         .throttle = mxser_throttle,
 467         .unthrottle = mxser_unthrottle,
 468         .set_termios = mxser_set_termios,
 469         .stop = mxser_stop,
 470         .start = mxser_start,
 471         .hangup = mxser_hangup,
 472         .break_ctl = mxser_rs_break,
 473         .wait_until_sent = mxser_wait_until_sent,
 474         .tiocmget = mxser_tiocmget,
 475         .tiocmset = mxser_tiocmset,
 476 };
 477
 478 /*
 479  * The MOXA Smartio/Industio serial driver boot-time initialization code!
 480  */
 481
 482 static int __init mxser_module_init(void)
 483 {
 484         int ret;
 485
 486         if (verbose)
 487                 printk(KERN_DEBUG "Loading module mxser ...\n");
 488         ret = mxser_init();
 489         if (verbose)
 490                 printk(KERN_DEBUG "Done.\n");
 491         return ret;
 492 }
 493
 494 static void __exit mxser_module_exit(void)
 495 {
 496         int i, err;
 497
 498         if (verbose)
 499                 printk(KERN_DEBUG "Unloading module mxser ...\n");
 500
 501         err = tty_unregister_driver(mxvar_sdriver);
 502         if (!err)
 503                 put_tty_driver(mxvar_sdriver);
 504         else
 505                 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
 506
 507         for (i = 0; i < MXSER_BOARDS; i++) {
 508                 struct pci_dev *pdev;
 509
 510                 if (mxsercfg[i].board_type == -1)
 511                         continue;
 512                 else {
 513                         pdev = mxsercfg[i].pciInfo.pdev;
 514                         free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 515                         if (pdev != NULL) {     /* PCI */
 516                                 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
 517                                 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
 518                                 pci_dev_put(pdev);
 519                         } else {
 520                                 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
 521                                 release_region(mxsercfg[i].vector, 1);
 522                         }
 523                 }
 524         }
 525         if (verbose)
 526                 printk(KERN_DEBUG "Done.\n");
 527 }
 528
 529 static void process_txrx_fifo(struct mxser_struct *info)
 530 {
 531         int i;
 532
 533         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 534                 info->rx_trigger = 1;
 535                 info->rx_high_water = 1;
 536                 info->rx_low_water = 1;
 537                 info->xmit_fifo_size = 1;
 538         } else {
 539                 for (i = 0; i < UART_INFO_NUM; i++) {
 540                         if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
 541                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 542                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 543                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 544                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 545                                 break;
 546                         }
 547                 }
 548         }
 549 }
 550
 551 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
 552 {
 553         struct mxser_struct *info;
 554         int retval;
 555         int i, n;
 556
 557         n = board * MXSER_PORTS_PER_BOARD;
 558         info = &mxvar_table[n];
 559         /*if (verbose) */  {
 560                 printk(KERN_DEBUG "        ttyMI%d - ttyMI%d ",
 561                         n, n + hwconf->ports - 1);
 562                 printk(" max. baud rate = %d bps.\n",
 563                         hwconf->MaxCanSetBaudRate[0]);
 564         }
 565
 566         for (i = 0; i < hwconf->ports; i++, n++, info++) {
 567                 info->port = n;
 568                 info->base = hwconf->ioaddr[i];
 569                 info->irq = hwconf->irq;
 570                 info->vector = hwconf->vector;
 571                 info->vectormask = hwconf->vector_mask;
 572                 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
 573                 info->stop_rx = 0;
 574                 info->ldisc_stop_rx = 0;
 575
 576                 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
 577                 /* Enhance mode enabled here */
 578                 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
 579                         ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
 580                 }
 581
 582                 info->flags = ASYNC_SHARE_IRQ;
 583                 info->type = hwconf->uart_type;
 584                 info->baud_base = hwconf->baud_base[i];
 585
 586                 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
 587
 588                 process_txrx_fifo(info);
 589
 590
 591                 info->custom_divisor = hwconf->baud_base[i] * 16;
 592                 info->close_delay = 5 * HZ / 10;
 593                 info->closing_wait = 30 * HZ;
 594                 INIT_WORK(&info->tqueue, mxser_do_softint);
 595                 info->normal_termios = mxvar_sdriver->init_termios;
 596                 init_waitqueue_head(&info->open_wait);
 597                 init_waitqueue_head(&info->close_wait);
 598                 init_waitqueue_head(&info->delta_msr_wait);
 599                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 600                 info->err_shadow = 0;
 601                 spin_lock_init(&info->slock);
 602         }
 603         /*
 604          * Allocate the IRQ if necessary
 605          */
 606
 607
 608         /* before set INT ISR, disable all int */
 609         for (i = 0; i < hwconf->ports; i++) {
 610                 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
 611                         hwconf->ioaddr[i] + UART_IER);
 612         }
 613
 614         n = board * MXSER_PORTS_PER_BOARD;
 615         info = &mxvar_table[n];
 616
 617         retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
 618                                 "mxser", info);
 619         if (retval) {
 620                 printk(KERN_ERR "Board %d: %s",
 621                         board, mxser_brdname[hwconf->board_type - 1]);
 622                 printk("  Request irq failed, IRQ (%d) may conflict with"
 623                         " another device.\n", info->irq);
 624                 return retval;
 625         }
 626         return 0;
 627 }
 628
 629 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
 630 {
 631         mxsercfg[board] = *hwconf;
 632 }
 633
 634 #ifdef CONFIG_PCI
 635 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
 636 {
 637         int i, j;
 638         /* unsigned int val; */
 639         unsigned int ioaddress;
 640         struct pci_dev *pdev = hwconf->pciInfo.pdev;
 641
 642         /* io address */
 643         hwconf->board_type = board_type;
 644         hwconf->ports = mxser_numports[board_type - 1];
 645         ioaddress = pci_resource_start(pdev, 2);
 646         request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
 647                         "mxser(IO)");
 648
 649         for (i = 0; i < hwconf->ports; i++)
 650                 hwconf->ioaddr[i] = ioaddress + 8 * i;
 651
 652         /* vector */
 653         ioaddress = pci_resource_start(pdev, 3);
 654         request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
 655                         "mxser(vector)");
 656         hwconf->vector = ioaddress;
 657
 658         /* irq */
 659         hwconf->irq = hwconf->pciInfo.pdev->irq;
 660
 661         hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
 662         hwconf->uart_type = PORT_16550A;
 663         hwconf->vector_mask = 0;
 664
 665
 666         for (i = 0; i < hwconf->ports; i++) {
 667                 for (j = 0; j < UART_INFO_NUM; j++) {
 668                         if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
 669                                 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
 670
 671                                 /* exception....CP-102 */
 672                                 if (board_type == MXSER_BOARD_CP102)
 673                                         hwconf->MaxCanSetBaudRate[i] = 921600;
 674                                 break;
 675                         }
 676                 }
 677         }
 678
 679         if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
 680                 for (i = 0; i < hwconf->ports; i++) {
 681                         if (i < 4)
 682                                 hwconf->opmode_ioaddr[i] = ioaddress + 4;
 683                         else
 684                                 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
 685                 }
 686                 outb(0, ioaddress + 4); /* default set to RS232 mode */
 687                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
 688         }
 689
 690         for (i = 0; i < hwconf->ports; i++) {
 691                 hwconf->vector_mask |= (1 << i);
 692                 hwconf->baud_base[i] = 921600;
 693         }
 694         return 0;
 695 }
 696 #endif
 697
 698 static int mxser_init(void)
 699 {
 700         int i, m, retval, b, n;
 701         struct pci_dev *pdev = NULL;
 702         int index;
 703         unsigned char busnum, devnum;
 704         struct mxser_hwconf hwconf;
 705
 706         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
 707         if (!mxvar_sdriver)
 708                 return -ENOMEM;
 709         spin_lock_init(&gm_lock);
 710
 711         for (i = 0; i < MXSER_BOARDS; i++) {
 712                 mxsercfg[i].board_type = -1;
 713         }
 714
 715         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
 716                 MXSER_VERSION);
 717
 718         /* Initialize the tty_driver structure */
 719         memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
 720         mxvar_sdriver->owner = THIS_MODULE;
 721         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
 722         mxvar_sdriver->name = "ttyMI";
 723         mxvar_sdriver->major = ttymajor;
 724         mxvar_sdriver->minor_start = 0;
 725         mxvar_sdriver->num = MXSER_PORTS + 1;
 726         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
 727         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
 728         mxvar_sdriver->init_termios = tty_std_termios;
 729         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
 730         mxvar_sdriver->init_termios.c_ispeed = 9600;
 731         mxvar_sdriver->init_termios.c_ospeed = 9600;
 732         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
 733         tty_set_operations(mxvar_sdriver, &mxser_ops);
 734         mxvar_sdriver->ttys = mxvar_tty;
 735         mxvar_sdriver->termios = mxvar_termios;
 736         mxvar_sdriver->termios_locked = mxvar_termios_locked;
 737
 738         mxvar_diagflag = 0;
 739         memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
 740         memset(&mxvar_log, 0, sizeof(struct mxser_log));
 741
 742         memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
 743         memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
 744         memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
 745         memset(&hwconf, 0, sizeof(struct mxser_hwconf));
 746
 747         m = 0;
 748         /* Start finding ISA boards here */
 749         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 750                 int cap;
 751
 752                 if (!(cap = mxserBoardCAP[b]))
 753                         continue;
 754
 755                 retval = mxser_get_ISA_conf(cap, &hwconf);
 756
 757                 if (retval != 0)
 758                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 759                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 760
 761                 if (retval <= 0) {
 762                         if (retval == MXSER_ERR_IRQ)
 763                                 printk(KERN_ERR "Invalid interrupt number, "
 764                                         "board not configured\n");
 765                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 766                                 printk(KERN_ERR "Invalid interrupt number, "
 767                                         "board not configured\n");
 768                         else if (retval == MXSER_ERR_VECTOR)
 769                                 printk(KERN_ERR "Invalid interrupt vector, "
 770                                         "board not configured\n");
 771                         else if (retval == MXSER_ERR_IOADDR)
 772                                 printk(KERN_ERR "Invalid I/O address, "
 773                                         "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                 /*
 784                  * init mxsercfg first,
 785                  * or mxsercfg data is not correct on ISR.
 786                  */
 787                 /* mxser_initbrd will hook ISR. */
 788                 if (mxser_initbrd(m, &hwconf) < 0)
 789                         continue;
 790
 791                 m++;
 792         }
 793
 794         /* Start finding ISA boards from module arg */
 795         for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
 796                 int cap;
 797
 798                 if (!(cap = ioaddr[b]))
 799                         continue;
 800
 801                 retval = mxser_get_ISA_conf(cap, &hwconf);
 802
 803                 if (retval != 0)
 804                         printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
 805                                 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
 806
 807                 if (retval <= 0) {
 808                         if (retval == MXSER_ERR_IRQ)
 809                                 printk(KERN_ERR "Invalid interrupt number, "
 810                                         "board not configured\n");
 811                         else if (retval == MXSER_ERR_IRQ_CONFLIT)
 812                                 printk(KERN_ERR "Invalid interrupt number, "
 813                                         "board not configured\n");
 814                         else if (retval == MXSER_ERR_VECTOR)
 815                                 printk(KERN_ERR "Invalid interrupt vector, "
 816                                         "board not configured\n");
 817                         else if (retval == MXSER_ERR_IOADDR)
 818                                 printk(KERN_ERR "Invalid I/O address, "
 819                                         "board not configured\n");
 820
 821                         continue;
 822                 }
 823
 824                 hwconf.pciInfo.busNum = 0;
 825                 hwconf.pciInfo.devNum = 0;
 826                 hwconf.pciInfo.pdev = NULL;
 827
 828                 mxser_getcfg(m, &hwconf);
 829                 /*
 830                  * init mxsercfg first,
 831                  * or mxsercfg data is not correct on ISR.
 832                  */
 833                 /* mxser_initbrd will hook ISR. */
 834                 if (mxser_initbrd(m, &hwconf) < 0)
 835                         continue;
 836
 837                 m++;
 838         }
 839
 840         /* start finding PCI board here */
 841 #ifdef CONFIG_PCI
 842         n = ARRAY_SIZE(mxser_pcibrds) - 1;
 843         index = 0;
 844         b = 0;
 845         while (b < n) {
 846                 pdev = pci_get_device(mxser_pcibrds[b].vendor,
 847                                 mxser_pcibrds[b].device, pdev);
 848                 if (pdev == NULL) {
 849                         b++;
 850                         continue;
 851                 }
 852                 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
 853                 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
 854                 hwconf.pciInfo.pdev = pdev;
 855                 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
 856                         mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
 857                         busnum, devnum >> 3);
 858                 index++;
 859                 if (m >= MXSER_BOARDS)
 860                         printk(KERN_ERR
 861                                 "Too many Smartio/Industio family boards find "
 862                                 "(maximum %d), board not configured\n",
 863                                 MXSER_BOARDS);
 864                 else {
 865                         if (pci_enable_device(pdev)) {
 866                                 printk(KERN_ERR "Moxa SmartI/O PCI enable "
 867                                         "fail !\n");
 868                                 continue;
 869                         }
 870                         retval = mxser_get_PCI_conf(busnum, devnum,
 871                                         (int)mxser_pcibrds[b].driver_data,
 872                                         &hwconf);
 873                         if (retval < 0) {
 874                                 if (retval == MXSER_ERR_IRQ)
 875                                         printk(KERN_ERR
 876                                                 "Invalid interrupt number, "
 877                                                 "board not configured\n");
 878                                 else if (retval == MXSER_ERR_IRQ_CONFLIT)
 879                                         printk(KERN_ERR
 880                                                 "Invalid interrupt number, "
 881                                                 "board not configured\n");
 882                                 else if (retval == MXSER_ERR_VECTOR)
 883                                         printk(KERN_ERR
 884                                                 "Invalid interrupt vector, "
 885                                                 "board not configured\n");
 886                                 else if (retval == MXSER_ERR_IOADDR)
 887                                         printk(KERN_ERR
 888                                                 "Invalid I/O address, "
 889                                                 "board not configured\n");
 890                                 continue;
 891                         }
 892                         mxser_getcfg(m, &hwconf);
 893                         /* init mxsercfg first,
 894                          * or mxsercfg data is not correct on ISR.
 895                          */
 896                         /* mxser_initbrd will hook ISR. */
 897                         if (mxser_initbrd(m, &hwconf) < 0)
 898                                 continue;
 899                         m++;
 900                         /* Keep an extra reference if we succeeded. It will
 901                            be returned at unload time */
 902                         pci_dev_get(pdev);
 903                 }
 904         }
 905 #endif
 906
 907         retval = tty_register_driver(mxvar_sdriver);
 908         if (retval) {
 909                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
 910                                 " driver !\n");
 911                 put_tty_driver(mxvar_sdriver);
 912
 913                 for (i = 0; i < MXSER_BOARDS; i++) {
 914                         if (mxsercfg[i].board_type == -1)
 915                                 continue;
 916                         else {
 917                                 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
 918                                 /* todo: release io, vector */
 919                         }
 920                 }
 921                 return retval;
 922         }
 923
 924         return 0;
 925 }
 926
 927 static void mxser_do_softint(struct work_struct *work)
 928 {
 929         struct mxser_struct *info =
 930                 container_of(work, struct mxser_struct, tqueue);
 931         struct tty_struct *tty;
 932
 933         tty = info->tty;
 934
 935         if (tty) {
 936                 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
 937                         tty_wakeup(tty);
 938                 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
 939                         tty_hangup(tty);
 940         }
 941 }
 942
 943 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
 944 {
 945         unsigned char status = 0;
 946
 947         status = inb(baseaddr + UART_MSR);
 948
 949         mxser_msr[port] &= 0x0F;
 950         mxser_msr[port] |= status;
 951         status = mxser_msr[port];
 952         if (mode)
 953                 mxser_msr[port] = 0;
 954
 955         return status;
 956 }
 957
 958 /*
 959  * This routine is called whenever a serial port is opened.  It
 960  * enables interrupts for a serial port, linking in its async structure into
 961  * the IRQ chain.   It also performs the serial-specific
 962  * initialization for the tty structure.
 963  */
 964 static int mxser_open(struct tty_struct *tty, struct file *filp)
 965 {
 966         struct mxser_struct *info;
 967         int retval, line;
 968
 969         /* initialize driver_data in case something fails */
 970         tty->driver_data = NULL;
 971
 972         line = tty->index;
 973         if (line == MXSER_PORTS)
 974                 return 0;
 975         if (line < 0 || line > MXSER_PORTS)
 976                 return -ENODEV;
 977         info = mxvar_table + line;
 978         if (!info->base)
 979                 return -ENODEV;
 980
 981         tty->driver_data = info;
 982         info->tty = tty;
 983         /*
 984          * Start up serial port
 985          */
 986         retval = mxser_startup(info);
 987         if (retval)
 988                 return retval;
 989
 990         retval = mxser_block_til_ready(tty, filp, info);
 991         if (retval)
 992                 return retval;
 993
 994         info->count++;
 995
 996         if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
 997                 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
 998                         *tty->termios = info->normal_termios;
 999                 else
1000                         *tty->termios = info->callout_termios;
1001                 mxser_change_speed(info, NULL);
1002         }
1003
1004         info->session = process_session(current);
1005         info->pgrp = process_group(current);
1006
1007         /*
1008         status = mxser_get_msr(info->base, 0, info->port);
1009         mxser_check_modem_status(info, status);
1010         */
1011
1012 /* unmark here for very high baud rate (ex. 921600 bps) used */
1013         tty->low_latency = 1;
1014         return 0;
1015 }
1016
1017 /*
1018  * This routine is called when the serial port gets closed.  First, we
1019  * wait for the last remaining data to be sent.  Then, we unlink its
1020  * async structure from the interrupt chain if necessary, and we free
1021  * that IRQ if nothing is left in the chain.
1022  */
1023 static void mxser_close(struct tty_struct *tty, struct file *filp)
1024 {
1025         struct mxser_struct *info = tty->driver_data;
1026
1027         unsigned long timeout;
1028         unsigned long flags;
1029         struct tty_ldisc *ld;
1030
1031         if (tty->index == MXSER_PORTS)
1032                 return;
1033         if (!info)
1034                 return;
1035
1036         spin_lock_irqsave(&info->slock, flags);
1037
1038         if (tty_hung_up_p(filp)) {
1039                 spin_unlock_irqrestore(&info->slock, flags);
1040                 return;
1041         }
1042         if ((tty->count == 1) && (info->count != 1)) {
1043                 /*
1044                  * Uh, oh.  tty->count is 1, which means that the tty
1045                  * structure will be freed.  Info->count should always
1046                  * be one in these conditions.  If it's greater than
1047                  * one, we've got real problems, since it means the
1048                  * serial port won't be shutdown.
1049                  */
1050                 printk(KERN_ERR "mxser_close: bad serial port count; "
1051                         "tty->count is 1, info->count is %d\n", info->count);
1052                 info->count = 1;
1053         }
1054         if (--info->count < 0) {
1055                 printk(KERN_ERR "mxser_close: bad serial port count for "
1056                         "ttys%d: %d\n", info->port, info->count);
1057                 info->count = 0;
1058         }
1059         if (info->count) {
1060                 spin_unlock_irqrestore(&info->slock, flags);
1061                 return;
1062         }
1063         info->flags |= ASYNC_CLOSING;
1064         spin_unlock_irqrestore(&info->slock, flags);
1065         /*
1066          * Save the termios structure, since this port may have
1067          * separate termios for callout and dialin.
1068          */
1069         if (info->flags & ASYNC_NORMAL_ACTIVE)
1070                 info->normal_termios = *tty->termios;
1071         /*
1072          * Now we wait for the transmit buffer to clear; and we notify
1073          * the line discipline to only process XON/XOFF characters.
1074          */
1075         tty->closing = 1;
1076         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1077                 tty_wait_until_sent(tty, info->closing_wait);
1078         /*
1079          * At this point we stop accepting input.  To do this, we
1080          * disable the receive line status interrupts, and tell the
1081          * interrupt driver to stop checking the data ready bit in the
1082          * line status register.
1083          */
1084         info->IER &= ~UART_IER_RLSI;
1085         if (info->IsMoxaMustChipFlag)
1086                 info->IER &= ~MOXA_MUST_RECV_ISR;
1087 /* by William
1088         info->read_status_mask &= ~UART_LSR_DR;
1089 */
1090         if (info->flags & ASYNC_INITIALIZED) {
1091                 outb(info->IER, info->base + UART_IER);
1092                 /*
1093                  * Before we drop DTR, make sure the UART transmitter
1094                  * has completely drained; this is especially
1095                  * important if there is a transmit FIFO!
1096                  */
1097                 timeout = jiffies + HZ;
1098                 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1099                         schedule_timeout_interruptible(5);
1100                         if (time_after(jiffies, timeout))
1101                                 break;
1102                 }
1103         }
1104         mxser_shutdown(info);
1105
1106         if (tty->driver->flush_buffer)
1107                 tty->driver->flush_buffer(tty);
1108
1109         ld = tty_ldisc_ref(tty);
1110         if (ld) {
1111                 if (ld->flush_buffer)
1112                         ld->flush_buffer(tty);
1113                 tty_ldisc_deref(ld);
1114         }
1115
1116         tty->closing = 0;
1117         info->event = 0;
1118         info->tty = NULL;
1119         if (info->blocked_open) {
1120                 if (info->close_delay)
1121                         schedule_timeout_interruptible(info->close_delay);
1122                 wake_up_interruptible(&info->open_wait);
1123         }
1124
1125         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1126         wake_up_interruptible(&info->close_wait);
1127
1128 }
1129
1130 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1131 {
1132         int c, total = 0;
1133         struct mxser_struct *info = tty->driver_data;
1134         unsigned long flags;
1135
1136         if (!info->xmit_buf)
1137                 return 0;
1138
1139         while (1) {
1140                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1141                                           SERIAL_XMIT_SIZE - info->xmit_head));
1142                 if (c <= 0)
1143                         break;
1144
1145                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1146                 spin_lock_irqsave(&info->slock, flags);
1147                 info->xmit_head = (info->xmit_head + c) &
1148                                   (SERIAL_XMIT_SIZE - 1);
1149                 info->xmit_cnt += c;
1150                 spin_unlock_irqrestore(&info->slock, flags);
1151
1152                 buf += c;
1153                 count -= c;
1154                 total += c;
1155         }
1156
1157         if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1158                 if (!tty->hw_stopped ||
1159                                 (info->type == PORT_16550A) ||
1160                                 (info->IsMoxaMustChipFlag)) {
1161                         spin_lock_irqsave(&info->slock, flags);
1162                         info->IER |= UART_IER_THRI;
1163                         outb(info->IER, info->base + UART_IER);
1164                         spin_unlock_irqrestore(&info->slock, flags);
1165                 }
1166         }
1167         return total;
1168 }
1169
1170 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1171 {
1172         struct mxser_struct *info = tty->driver_data;
1173         unsigned long flags;
1174
1175         if (!info->xmit_buf)
1176                 return;
1177
1178         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1179                 return;
1180
1181         spin_lock_irqsave(&info->slock, flags);
1182         info->xmit_buf[info->xmit_head++] = ch;
1183         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1184         info->xmit_cnt++;
1185         spin_unlock_irqrestore(&info->slock, flags);
1186         if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1187                 if (!tty->hw_stopped ||
1188                                 (info->type == PORT_16550A) ||
1189                                 info->IsMoxaMustChipFlag) {
1190                         spin_lock_irqsave(&info->slock, flags);
1191                         info->IER |= UART_IER_THRI;
1192                         outb(info->IER, info->base + UART_IER);
1193                         spin_unlock_irqrestore(&info->slock, flags);
1194                 }
1195         }
1196 }
1197
1198
1199 static void mxser_flush_chars(struct tty_struct *tty)
1200 {
1201         struct mxser_struct *info = tty->driver_data;
1202         unsigned long flags;
1203
1204         if (info->xmit_cnt <= 0 ||
1205                         tty->stopped ||
1206                         !info->xmit_buf ||
1207                         (tty->hw_stopped &&
1208                          (info->type != PORT_16550A) &&
1209                          (!info->IsMoxaMustChipFlag)
1210                         ))
1211                 return;
1212
1213         spin_lock_irqsave(&info->slock, flags);
1214
1215         info->IER |= UART_IER_THRI;
1216         outb(info->IER, info->base + UART_IER);
1217
1218         spin_unlock_irqrestore(&info->slock, flags);
1219 }
1220
1221 static int mxser_write_room(struct tty_struct *tty)
1222 {
1223         struct mxser_struct *info = tty->driver_data;
1224         int ret;
1225
1226         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1227         if (ret < 0)
1228                 ret = 0;
1229         return ret;
1230 }
1231
1232 static int mxser_chars_in_buffer(struct tty_struct *tty)
1233 {
1234         struct mxser_struct *info = tty->driver_data;
1235         return info->xmit_cnt;
1236 }
1237
1238 static void mxser_flush_buffer(struct tty_struct *tty)
1239 {
1240         struct mxser_struct *info = tty->driver_data;
1241         char fcr;
1242         unsigned long flags;
1243
1244
1245         spin_lock_irqsave(&info->slock, flags);
1246         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1247
1248         /* below added by shinhay */
1249         fcr = inb(info->base + UART_FCR);
1250         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1251                 info->base + UART_FCR);
1252         outb(fcr, info->base + UART_FCR);
1253
1254         spin_unlock_irqrestore(&info->slock, flags);
1255         /* above added by shinhay */
1256
1257         tty_wakeup(tty);
1258 }
1259
1260 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1261 {
1262         struct mxser_struct *info = tty->driver_data;
1263         int retval;
1264         struct async_icount cprev, cnow;        /* kernel counter temps */
1265         struct serial_icounter_struct __user *p_cuser;
1266         unsigned long templ;
1267         unsigned long flags;
1268         void __user *argp = (void __user *)arg;
1269
1270         if (tty->index == MXSER_PORTS)
1271                 return mxser_ioctl_special(cmd, argp);
1272
1273         /* following add by Victor Yu. 01-05-2004 */
1274         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1275                 int opmode, p;
1276                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1277                 int shiftbit;
1278                 unsigned char val, mask;
1279
1280                 p = info->port % 4;
1281                 if (cmd == MOXA_SET_OP_MODE) {
1282                         if (get_user(opmode, (int __user *) argp))
1283                                 return -EFAULT;
1284                         if (opmode != RS232_MODE &&
1285                                         opmode != RS485_2WIRE_MODE &&
1286                                         opmode != RS422_MODE &&
1287                                         opmode != RS485_4WIRE_MODE)
1288                                 return -EFAULT;
1289                         mask = ModeMask[p];
1290                         shiftbit = p * 2;
1291                         val = inb(info->opmode_ioaddr);
1292                         val &= mask;
1293                         val |= (opmode << shiftbit);
1294                         outb(val, info->opmode_ioaddr);
1295                 } else {
1296                         shiftbit = p * 2;
1297                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1298                         opmode &= OP_MODE_MASK;
1299                         if (copy_to_user(argp, &opmode, sizeof(int)))
1300                                 return -EFAULT;
1301                 }
1302                 return 0;
1303         }
1304         /* above add by Victor Yu. 01-05-2004 */
1305
1306         if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1307                 if (tty->flags & (1 << TTY_IO_ERROR))
1308                         return -EIO;
1309         }
1310         switch (cmd) {
1311         case TCSBRK:            /* SVID version: non-zero arg --> no break */
1312                 retval = tty_check_change(tty);
1313                 if (retval)
1314                         return retval;
1315                 tty_wait_until_sent(tty, 0);
1316                 if (!arg)
1317                         mxser_send_break(info, HZ / 4); /* 1/4 second */
1318                 return 0;
1319         case TCSBRKP:           /* support for POSIX tcsendbreak() */
1320                 retval = tty_check_change(tty);
1321                 if (retval)
1322                         return retval;
1323                 tty_wait_until_sent(tty, 0);
1324                 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1325                 return 0;
1326         case TIOCGSOFTCAR:
1327                 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1328         case TIOCSSOFTCAR:
1329                 if (get_user(templ, (unsigned long __user *) argp))
1330                         return -EFAULT;
1331                 arg = templ;
1332                 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1333                 return 0;
1334         case TIOCGSERIAL:
1335                 return mxser_get_serial_info(info, argp);
1336         case TIOCSSERIAL:
1337                 return mxser_set_serial_info(info, argp);
1338         case TIOCSERGETLSR:     /* Get line status register */
1339                 return mxser_get_lsr_info(info, argp);
1340                 /*
1341                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1342                  * - mask passed in arg for lines of interest
1343                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1344                  * Caller should use TIOCGICOUNT to see which one it was
1345                  */
1346         case TIOCMIWAIT: {
1347                         DECLARE_WAITQUEUE(wait, current);
1348                         int ret;
1349                         spin_lock_irqsave(&info->slock, flags);
1350                         cprev = info->icount;   /* note the counters on entry */
1351                         spin_unlock_irqrestore(&info->slock, flags);
1352
1353                         add_wait_queue(&info->delta_msr_wait, &wait);
1354                         while (1) {
1355                                 spin_lock_irqsave(&info->slock, flags);
1356                                 cnow = info->icount;    /* atomic copy */
1357                                 spin_unlock_irqrestore(&info->slock, flags);
1358
1359                                 set_current_state(TASK_INTERRUPTIBLE);
1360                                 if (((arg & TIOCM_RNG) &&
1361                                                 (cnow.rng != cprev.rng)) ||
1362                                                 ((arg & TIOCM_DSR) &&
1363                                                 (cnow.dsr != cprev.dsr)) ||
1364                                                 ((arg & TIOCM_CD) &&
1365                                                 (cnow.dcd != cprev.dcd)) ||
1366                                                 ((arg & TIOCM_CTS) &&
1367                                                 (cnow.cts != cprev.cts))) {
1368                                         ret = 0;
1369                                         break;
1370                                 }
1371                                 /* see if a signal did it */
1372                                 if (signal_pending(current)) {
1373                                         ret = -ERESTARTSYS;
1374                                         break;
1375                                 }
1376                                 cprev = cnow;
1377                         }
1378                         current->state = TASK_RUNNING;
1379                         remove_wait_queue(&info->delta_msr_wait, &wait);
1380                         break;
1381                 }
1382                 /* NOTREACHED */
1383                 /*
1384                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1385                  * Return: write counters to the user passed counter struct
1386                  * NB: both 1->0 and 0->1 transitions are counted except for
1387                  *     RI where only 0->1 is counted.
1388                  */
1389         case TIOCGICOUNT:
1390                 spin_lock_irqsave(&info->slock, flags);
1391                 cnow = info->icount;
1392                 spin_unlock_irqrestore(&info->slock, flags);
1393                 p_cuser = argp;
1394                 /* modified by casper 1/11/2000 */
1395                 if (put_user(cnow.frame, &p_cuser->frame))
1396                         return -EFAULT;
1397                 if (put_user(cnow.brk, &p_cuser->brk))
1398                         return -EFAULT;
1399                 if (put_user(cnow.overrun, &p_cuser->overrun))
1400                         return -EFAULT;
1401                 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1402                         return -EFAULT;
1403                 if (put_user(cnow.parity, &p_cuser->parity))
1404                         return -EFAULT;
1405                 if (put_user(cnow.rx, &p_cuser->rx))
1406                         return -EFAULT;
1407                 if (put_user(cnow.tx, &p_cuser->tx))
1408                         return -EFAULT;
1409                 put_user(cnow.cts, &p_cuser->cts);
1410                 put_user(cnow.dsr, &p_cuser->dsr);
1411                 put_user(cnow.rng, &p_cuser->rng);
1412                 put_user(cnow.dcd, &p_cuser->dcd);
1413                 return 0;
1414         case MOXA_HighSpeedOn:
1415                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1416         case MOXA_SDS_RSTICOUNTER: {
1417                         info->mon_data.rxcnt = 0;
1418                         info->mon_data.txcnt = 0;
1419                         return 0;
1420                 }
1421 /* (above) added by James. */
1422         case MOXA_ASPP_SETBAUD:{
1423                         long baud;
1424                         if (get_user(baud, (long __user *)argp))
1425                                 return -EFAULT;
1426                         mxser_set_baud(info, baud);
1427                         return 0;
1428                 }
1429         case MOXA_ASPP_GETBAUD:
1430                 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1431                         return -EFAULT;
1432
1433                 return 0;
1434
1435         case MOXA_ASPP_OQUEUE:{
1436                         int len, lsr;
1437
1438                         len = mxser_chars_in_buffer(tty);
1439
1440                         lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1441
1442                         len += (lsr ? 0 : 1);
1443
1444                         if (copy_to_user(argp, &len, sizeof(int)))
1445                                 return -EFAULT;
1446
1447                         return 0;
1448                 }
1449         case MOXA_ASPP_MON: {
1450                         int mcr, status;
1451
1452                         /* info->mon_data.ser_param = tty->termios->c_cflag; */
1453
1454                         status = mxser_get_msr(info->base, 1, info->port, info);
1455                         mxser_check_modem_status(info, status);
1456
1457                         mcr = inb(info->base + UART_MCR);
1458                         if (mcr & MOXA_MUST_MCR_XON_FLAG)
1459                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1460                         else
1461                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1462
1463                         if (mcr & MOXA_MUST_MCR_TX_XON)
1464                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1465                         else
1466                                 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1467
1468                         if (info->tty->hw_stopped)
1469                                 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1470                         else
1471                                 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1472
1473                         if (copy_to_user(argp, &info->mon_data,
1474                                         sizeof(struct mxser_mon)))
1475                                 return -EFAULT;
1476
1477                         return 0;
1478                 }
1479
1480         case MOXA_ASPP_LSTATUS: {
1481                         if (copy_to_user(argp, &info->err_shadow,
1482                                         sizeof(unsigned char)))
1483                                 return -EFAULT;
1484
1485                         info->err_shadow = 0;
1486                         return 0;
1487                 }
1488         case MOXA_SET_BAUD_METHOD: {
1489                         int method;
1490
1491                         if (get_user(method, (int __user *)argp))
1492                                 return -EFAULT;
1493                         mxser_set_baud_method[info->port] = method;
1494                         if (copy_to_user(argp, &method, sizeof(int)))
1495                                 return -EFAULT;
1496
1497                         return 0;
1498                 }
1499         default:
1500                 return -ENOIOCTLCMD;
1501         }
1502         return 0;
1503 }
1504
1505 #ifndef CMSPAR
1506 #define CMSPAR 010000000000
1507 #endif
1508
1509 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1510 {
1511         int i, result, status;
1512
1513         switch (cmd) {
1514         case MOXA_GET_CONF:
1515                 if (copy_to_user(argp, mxsercfg,
1516                                 sizeof(struct mxser_hwconf) * 4))
1517                         return -EFAULT;
1518                 return 0;
1519         case MOXA_GET_MAJOR:
1520                 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1521                         return -EFAULT;
1522                 return 0;
1523
1524         case MOXA_GET_CUMAJOR:
1525                 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1526                         return -EFAULT;
1527                 return 0;
1528
1529         case MOXA_CHKPORTENABLE:
1530                 result = 0;
1531                 for (i = 0; i < MXSER_PORTS; i++) {
1532                         if (mxvar_table[i].base)
1533                                 result |= (1 << i);
1534                 }
1535                 return put_user(result, (unsigned long __user *)argp);
1536         case MOXA_GETDATACOUNT:
1537                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1538                         return -EFAULT;
1539                 return 0;
1540         case MOXA_GETMSTATUS:
1541                 for (i = 0; i < MXSER_PORTS; i++) {
1542                         GMStatus[i].ri = 0;
1543                         if (!mxvar_table[i].base) {
1544                                 GMStatus[i].dcd = 0;
1545                                 GMStatus[i].dsr = 0;
1546                                 GMStatus[i].cts = 0;
1547                                 continue;
1548                         }
1549
1550                         if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1551                                 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1552                         else
1553                                 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1554
1555                         status = inb(mxvar_table[i].base + UART_MSR);
1556                         if (status & 0x80 /*UART_MSR_DCD */ )
1557                                 GMStatus[i].dcd = 1;
1558                         else
1559                                 GMStatus[i].dcd = 0;
1560
1561                         if (status & 0x20 /*UART_MSR_DSR */ )
1562                                 GMStatus[i].dsr = 1;
1563                         else
1564                                 GMStatus[i].dsr = 0;
1565
1566
1567                         if (status & 0x10 /*UART_MSR_CTS */ )
1568                                 GMStatus[i].cts = 1;
1569                         else
1570                                 GMStatus[i].cts = 0;
1571                 }
1572                 if (copy_to_user(argp, GMStatus,
1573                                 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1574                         return -EFAULT;
1575                 return 0;
1576         case MOXA_ASPP_MON_EXT: {
1577                         int status;
1578                         int opmode, p;
1579                         int shiftbit;
1580                         unsigned cflag, iflag;
1581
1582                         for (i = 0; i < MXSER_PORTS; i++) {
1583                                 if (!mxvar_table[i].base)
1584                                         continue;
1585
1586                                 status = mxser_get_msr(mxvar_table[i].base, 0,
1587                                                         i, &(mxvar_table[i]));
1588                                 /*
1589                                 mxser_check_modem_status(&mxvar_table[i],
1590                                                                 status);
1591                                 */
1592                                 if (status & UART_MSR_TERI)
1593                                         mxvar_table[i].icount.rng++;
1594                                 if (status & UART_MSR_DDSR)
1595                                         mxvar_table[i].icount.dsr++;
1596                                 if (status & UART_MSR_DDCD)
1597                                         mxvar_table[i].icount.dcd++;
1598                                 if (status & UART_MSR_DCTS)
1599                                         mxvar_table[i].icount.cts++;
1600
1601                                 mxvar_table[i].mon_data.modem_status = status;
1602                                 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1603                                 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1604                                 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1605                                 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1606                                 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1607                                 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1608
1609                                 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1610                                         cflag = mxvar_table[i].normal_termios.c_cflag;
1611                                         iflag = mxvar_table[i].normal_termios.c_iflag;
1612                                 } else {
1613                                         cflag = mxvar_table[i].tty->termios->c_cflag;
1614                                         iflag = mxvar_table[i].tty->termios->c_iflag;
1615                                 }
1616
1617                                 mon_data_ext.databits[i] = cflag & CSIZE;
1618
1619                                 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1620
1621                                 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1622
1623                                 mon_data_ext.flowctrl[i] = 0x00;
1624
1625                                 if (cflag & CRTSCTS)
1626                                         mon_data_ext.flowctrl[i] |= 0x03;
1627
1628                                 if (iflag & (IXON | IXOFF))
1629                                         mon_data_ext.flowctrl[i] |= 0x0C;
1630
1631                                 if (mxvar_table[i].type == PORT_16550A)
1632                                         mon_data_ext.fifo[i] = 1;
1633                                 else
1634                                         mon_data_ext.fifo[i] = 0;
1635
1636                                 p = i % 4;
1637                                 shiftbit = p * 2;
1638                                 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1639                                 opmode &= OP_MODE_MASK;
1640
1641                                 mon_data_ext.iftype[i] = opmode;
1642
1643                         }
1644                         if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1645                                 return -EFAULT;
1646
1647                         return 0;
1648
1649                 }
1650         default:
1651                 return -ENOIOCTLCMD;
1652         }
1653         return 0;
1654 }
1655
1656 static void mxser_stoprx(struct tty_struct *tty)
1657 {
1658         struct mxser_struct *info = tty->driver_data;
1659         /* unsigned long flags; */
1660
1661         info->ldisc_stop_rx = 1;
1662         if (I_IXOFF(tty)) {
1663                 /* MX_LOCK(&info->slock); */
1664                 /* following add by Victor Yu. 09-02-2002 */
1665                 if (info->IsMoxaMustChipFlag) {
1666                         info->IER &= ~MOXA_MUST_RECV_ISR;
1667                         outb(info->IER, info->base + UART_IER);
1668                 } else {
1669                         /* above add by Victor Yu. 09-02-2002 */
1670                         info->x_char = STOP_CHAR(tty);
1671                         /* mask by Victor Yu. 09-02-2002 */
1672                         /* outb(info->IER, 0); */
1673                         outb(0, info->base + UART_IER);
1674                         info->IER |= UART_IER_THRI;
1675                         /* force Tx interrupt */
1676                         outb(info->IER, info->base + UART_IER);
1677                 }               /* add by Victor Yu. 09-02-2002 */
1678                 /* MX_UNLOCK(&info->slock); */
1679         }
1680
1681         if (info->tty->termios->c_cflag & CRTSCTS) {
1682                 /* MX_LOCK(&info->slock); */
1683                 info->MCR &= ~UART_MCR_RTS;
1684                 outb(info->MCR, info->base + UART_MCR);
1685                 /* MX_UNLOCK(&info->slock); */
1686         }
1687 }
1688
1689 static void mxser_startrx(struct tty_struct *tty)
1690 {
1691         struct mxser_struct *info = tty->driver_data;
1692         /* unsigned long flags; */
1693
1694         info->ldisc_stop_rx = 0;
1695         if (I_IXOFF(tty)) {
1696                 if (info->x_char)
1697                         info->x_char = 0;
1698                 else {
1699                         /* MX_LOCK(&info->slock); */
1700
1701                         /* following add by Victor Yu. 09-02-2002 */
1702                         if (info->IsMoxaMustChipFlag) {
1703                                 info->IER |= MOXA_MUST_RECV_ISR;
1704                                 outb(info->IER, info->base + UART_IER);
1705                         } else {
1706                                 /* above add by Victor Yu. 09-02-2002 */
1707
1708                                 info->x_char = START_CHAR(tty);
1709                                 /* mask by Victor Yu. 09-02-2002 */
1710                                 /* outb(info->IER, 0); */
1711                                 /* add by Victor Yu. 09-02-2002 */
1712                                 outb(0, info->base + UART_IER);
1713                                 /* force Tx interrupt */
1714                                 info->IER |= UART_IER_THRI;
1715                                 outb(info->IER, info->base + UART_IER);
1716                         }       /* add by Victor Yu. 09-02-2002 */
1717                         /* MX_UNLOCK(&info->slock); */
1718                 }
1719         }
1720
1721         if (info->tty->termios->c_cflag & CRTSCTS) {
1722                 /* MX_LOCK(&info->slock); */
1723                 info->MCR |= UART_MCR_RTS;
1724                 outb(info->MCR, info->base + UART_MCR);
1725                 /* MX_UNLOCK(&info->slock); */
1726         }
1727 }
1728
1729 /*
1730  * This routine is called by the upper-layer tty layer to signal that
1731  * incoming characters should be throttled.
1732  */
1733 static void mxser_throttle(struct tty_struct *tty)
1734 {
1735         /* struct mxser_struct *info = tty->driver_data; */
1736         /* unsigned long flags; */
1737
1738         /* MX_LOCK(&info->slock); */
1739         mxser_stoprx(tty);
1740         /* MX_UNLOCK(&info->slock); */
1741 }
1742
1743 static void mxser_unthrottle(struct tty_struct *tty)
1744 {
1745         /* struct mxser_struct *info = tty->driver_data; */
1746         /* unsigned long flags; */
1747
1748         /* MX_LOCK(&info->slock); */
1749         mxser_startrx(tty);
1750         /* MX_UNLOCK(&info->slock); */
1751 }
1752
1753 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1754 {
1755         struct mxser_struct *info = tty->driver_data;
1756         unsigned long flags;
1757
1758         if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1759                         (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1760
1761                 mxser_change_speed(info, old_termios);
1762
1763                 if ((old_termios->c_cflag & CRTSCTS) &&
1764                                 !(tty->termios->c_cflag & CRTSCTS)) {
1765                         tty->hw_stopped = 0;
1766                         mxser_start(tty);
1767                 }
1768         }
1769
1770 /* Handle sw stopped */
1771         if ((old_termios->c_iflag & IXON) &&
1772                         !(tty->termios->c_iflag & IXON)) {
1773                 tty->stopped = 0;
1774
1775                 /* following add by Victor Yu. 09-02-2002 */
1776                 if (info->IsMoxaMustChipFlag) {
1777                         spin_lock_irqsave(&info->slock, flags);
1778                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1779                         spin_unlock_irqrestore(&info->slock, flags);
1780                 }
1781                 /* above add by Victor Yu. 09-02-2002 */
1782
1783                 mxser_start(tty);
1784         }
1785 }
1786
1787 /*
1788  * mxser_stop() and mxser_start()
1789  *
1790  * This routines are called before setting or resetting tty->stopped.
1791  * They enable or disable transmitter interrupts, as necessary.
1792  */
1793 static void mxser_stop(struct tty_struct *tty)
1794 {
1795         struct mxser_struct *info = tty->driver_data;
1796         unsigned long flags;
1797
1798         spin_lock_irqsave(&info->slock, flags);
1799         if (info->IER & UART_IER_THRI) {
1800                 info->IER &= ~UART_IER_THRI;
1801                 outb(info->IER, info->base + UART_IER);
1802         }
1803         spin_unlock_irqrestore(&info->slock, flags);
1804 }
1805
1806 static void mxser_start(struct tty_struct *tty)
1807 {
1808         struct mxser_struct *info = tty->driver_data;
1809         unsigned long flags;
1810
1811         spin_lock_irqsave(&info->slock, flags);
1812         if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1813                 info->IER |= UART_IER_THRI;
1814                 outb(info->IER, info->base + UART_IER);
1815         }
1816         spin_unlock_irqrestore(&info->slock, flags);
1817 }
1818
1819 /*
1820  * mxser_wait_until_sent() --- wait until the transmitter is empty
1821  */
1822 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1823 {
1824         struct mxser_struct *info = tty->driver_data;
1825         unsigned long orig_jiffies, char_time;
1826         int lsr;
1827
1828         if (info->type == PORT_UNKNOWN)
1829                 return;
1830
1831         if (info->xmit_fifo_size == 0)
1832                 return;         /* Just in case.... */
1833
1834         orig_jiffies = jiffies;
1835         /*
1836          * Set the check interval to be 1/5 of the estimated time to
1837          * send a single character, and make it at least 1.  The check
1838          * interval should also be less than the timeout.
1839          *
1840          * Note: we have to use pretty tight timings here to satisfy
1841          * the NIST-PCTS.
1842          */
1843         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1844         char_time = char_time / 5;
1845         if (char_time == 0)
1846                 char_time = 1;
1847         if (timeout && timeout < char_time)
1848                 char_time = timeout;
1849         /*
1850          * If the transmitter hasn't cleared in twice the approximate
1851          * amount of time to send the entire FIFO, it probably won't
1852          * ever clear.  This assumes the UART isn't doing flow
1853          * control, which is currently the case.  Hence, if it ever
1854          * takes longer than info->timeout, this is probably due to a
1855          * UART bug of some kind.  So, we clamp the timeout parameter at
1856          * 2*info->timeout.
1857          */
1858         if (!timeout || timeout > 2 * info->timeout)
1859                 timeout = 2 * info->timeout;
1860 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1861         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1862                 timeout, char_time);
1863         printk("jiff=%lu...", jiffies);
1864 #endif
1865         while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1866 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1867                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1868 #endif
1869                 schedule_timeout_interruptible(char_time);
1870                 if (signal_pending(current))
1871                         break;
1872                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1873                         break;
1874         }
1875         set_current_state(TASK_RUNNING);
1876
1877 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1878         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1879 #endif
1880 }
1881
1882
1883 /*
1884  * This routine is called by tty_hangup() when a hangup is signaled.
1885  */
1886 void mxser_hangup(struct tty_struct *tty)
1887 {
1888         struct mxser_struct *info = tty->driver_data;
1889
1890         mxser_flush_buffer(tty);
1891         mxser_shutdown(info);
1892         info->event = 0;
1893         info->count = 0;
1894         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1895         info->tty = NULL;
1896         wake_up_interruptible(&info->open_wait);
1897 }
1898
1899
1900 /* added by James 03-12-2004. */
1901 /*
1902  * mxser_rs_break() --- routine which turns the break handling on or off
1903  */
1904 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1905 {
1906         struct mxser_struct *info = tty->driver_data;
1907         unsigned long flags;
1908
1909         spin_lock_irqsave(&info->slock, flags);
1910         if (break_state == -1)
1911                 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1912                         info->base + UART_LCR);
1913         else
1914                 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1915                         info->base + UART_LCR);
1916         spin_unlock_irqrestore(&info->slock, flags);
1917 }
1918
1919 /* (above) added by James. */
1920
1921
1922 /*
1923  * This is the serial driver's generic interrupt routine
1924  */
1925 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
1926 {
1927         int status, iir, i;
1928         struct mxser_struct *info;
1929         struct mxser_struct *port;
1930         int max, irqbits, bits, msr;
1931         int pass_counter = 0;
1932         int handled = IRQ_NONE;
1933
1934         port = NULL;
1935         /* spin_lock(&gm_lock); */
1936
1937         for (i = 0; i < MXSER_BOARDS; i++) {
1938                 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1939                         port = dev_id;
1940                         break;
1941                 }
1942         }
1943
1944         if (i == MXSER_BOARDS)
1945                 goto irq_stop;
1946         if (port == 0)
1947                 goto irq_stop;
1948         max = mxser_numports[mxsercfg[i].board_type - 1];
1949         while (1) {
1950                 irqbits = inb(port->vector) & port->vectormask;
1951                 if (irqbits == port->vectormask)
1952                         break;
1953
1954                 handled = IRQ_HANDLED;
1955                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1956                         if (irqbits == port->vectormask)
1957                                 break;
1958                         if (bits & irqbits)
1959                                 continue;
1960                         info = port + i;
1961
1962                         /* following add by Victor Yu. 09-13-2002 */
1963                         iir = inb(info->base + UART_IIR);
1964                         if (iir & UART_IIR_NO_INT)
1965                                 continue;
1966                         iir &= MOXA_MUST_IIR_MASK;
1967                         if (!info->tty) {
1968                                 status = inb(info->base + UART_LSR);
1969                                 outb(0x27, info->base + UART_FCR);
1970                                 inb(info->base + UART_MSR);
1971                                 continue;
1972                         }
1973                         /* above add by Victor Yu. 09-13-2002 */
1974                         /*
1975                            if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1976                            info->IER |= MOXA_MUST_RECV_ISR;
1977                            outb(info->IER, info->base + UART_IER);
1978                            }
1979                          */
1980
1981
1982                         /* mask by Victor Yu. 09-13-2002
1983                            if ( !info->tty ||
1984                            (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1985                            continue;
1986                          */
1987                         /* mask by Victor Yu. 09-02-2002
1988                            status = inb(info->base + UART_LSR) & info->read_status_mask;
1989                          */
1990
1991                         /* following add by Victor Yu. 09-02-2002 */
1992                         status = inb(info->base + UART_LSR);
1993
1994                         if (status & UART_LSR_PE)
1995                                 info->err_shadow |= NPPI_NOTIFY_PARITY;
1996                         if (status & UART_LSR_FE)
1997                                 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1998                         if (status & UART_LSR_OE)
1999                                 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
2000                         if (status & UART_LSR_BI)
2001                                 info->err_shadow |= NPPI_NOTIFY_BREAK;
2002
2003                         if (info->IsMoxaMustChipFlag) {
2004                                 /*
2005                                    if ( (status & 0x02) && !(status & 0x01) ) {
2006                                    outb(info->base+UART_FCR,  0x23);
2007                                    continue;
2008                                    }
2009                                  */
2010                                 if (iir == MOXA_MUST_IIR_GDA ||
2011                                                 iir == MOXA_MUST_IIR_RDA ||
2012                                                 iir == MOXA_MUST_IIR_RTO ||
2013                                                 iir == MOXA_MUST_IIR_LSR)
2014                                         mxser_receive_chars(info, &status);
2015
2016                         } else {
2017                                 /* above add by Victor Yu. 09-02-2002 */
2018
2019                                 status &= info->read_status_mask;
2020                                 if (status & UART_LSR_DR)
2021                                         mxser_receive_chars(info, &status);
2022                         }
2023                         msr = inb(info->base + UART_MSR);
2024                         if (msr & UART_MSR_ANY_DELTA) {
2025                                 mxser_check_modem_status(info, msr);
2026                         }
2027                         /* following add by Victor Yu. 09-13-2002 */
2028                         if (info->IsMoxaMustChipFlag) {
2029                                 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2030                                         mxser_transmit_chars(info);
2031                                 }
2032                         } else {
2033                                 /* above add by Victor Yu. 09-13-2002 */
2034
2035                                 if (status & UART_LSR_THRE) {
2036 /* 8-2-99 by William
2037                             if ( info->x_char || (info->xmit_cnt > 0) )
2038 */
2039                                         mxser_transmit_chars(info);
2040                                 }
2041                         }
2042                 }
2043                 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2044                         break;  /* Prevent infinite loops */
2045                 }
2046         }
2047
2048       irq_stop:
2049         /* spin_unlock(&gm_lock); */
2050         return handled;
2051 }
2052
2053 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2054 {
2055         struct tty_struct *tty = info->tty;
2056         unsigned char ch, gdl;
2057         int ignored = 0;
2058         int cnt = 0;
2059         int recv_room;
2060         int max = 256;
2061         unsigned long flags;
2062
2063         spin_lock_irqsave(&info->slock, flags);
2064
2065         recv_room = tty->receive_room;
2066         if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2067                 /* mxser_throttle(tty); */
2068                 mxser_stoprx(tty);
2069                 /* return; */
2070         }
2071
2072         /* following add by Victor Yu. 09-02-2002 */
2073         if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2074
2075                 if (*status & UART_LSR_SPECIAL) {
2076                         goto intr_old;
2077                 }
2078                 /* following add by Victor Yu. 02-11-2004 */
2079                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2080                                 (*status & MOXA_MUST_LSR_RERR))
2081                         goto intr_old;
2082                 /* above add by Victor Yu. 02-14-2004 */
2083                 if (*status & MOXA_MUST_LSR_RERR)
2084                         goto intr_old;
2085
2086                 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2087
2088                 /* add by Victor Yu. 02-11-2004 */
2089                 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2090                         gdl &= MOXA_MUST_GDL_MASK;
2091                 if (gdl >= recv_room) {
2092                         if (!info->ldisc_stop_rx) {
2093                                 /* mxser_throttle(tty); */
2094                                 mxser_stoprx(tty);
2095                         }
2096                         /* return; */
2097                 }
2098                 while (gdl--) {
2099                         ch = inb(info->base + UART_RX);
2100                         tty_insert_flip_char(tty, ch, 0);
2101                         cnt++;
2102                         /*
2103                            if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2104                            mxser_stoprx(tty);
2105                            info->stop_rx = 1;
2106                            break;
2107                            } */
2108                 }
2109                 goto end_intr;
2110         }
2111  intr_old:
2112         /* above add by Victor Yu. 09-02-2002 */
2113
2114         do {
2115                 if (max-- < 0)
2116                         break;
2117                 /*
2118                    if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2119                    mxser_stoprx(tty);
2120                    info->stop_rx=1;
2121                    break;
2122                    }
2123                  */
2124
2125                 ch = inb(info->base + UART_RX);
2126                 /* following add by Victor Yu. 09-02-2002 */
2127                 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2128                         outb(0x23, info->base + UART_FCR);
2129                 *status &= info->read_status_mask;
2130                 /* above add by Victor Yu. 09-02-2002 */
2131                 if (*status & info->ignore_status_mask) {
2132                         if (++ignored > 100)
2133                                 break;
2134                 } else {
2135                         char flag = 0;
2136                         if (*status & UART_LSR_SPECIAL) {
2137                                 if (*status & UART_LSR_BI) {
2138                                         flag = TTY_BREAK;
2139 /* added by casper 1/11/2000 */
2140                                         info->icount.brk++;
2141 /* */
2142                                         if (info->flags & ASYNC_SAK)
2143                                                 do_SAK(tty);
2144                                 } else if (*status & UART_LSR_PE) {
2145                                         flag = TTY_PARITY;
2146 /* added by casper 1/11/2000 */
2147                                         info->icount.parity++;
2148 /* */
2149                                 } else if (*status & UART_LSR_FE) {
2150                                         flag = TTY_FRAME;
2151 /* added by casper 1/11/2000 */
2152                                         info->icount.frame++;
2153 /* */
2154                                 } else if (*status & UART_LSR_OE) {
2155                                         flag = TTY_OVERRUN;
2156 /* added by casper 1/11/2000 */
2157                                         info->icount.overrun++;
2158 /* */
2159                                 }
2160                         }
2161                         tty_insert_flip_char(tty, ch, flag);
2162                         cnt++;
2163                         if (cnt >= recv_room) {
2164                                 if (!info->ldisc_stop_rx) {
2165                                         /* mxser_throttle(tty); */
2166                                         mxser_stoprx(tty);
2167                                 }
2168                                 break;
2169                         }
2170
2171                 }
2172
2173                 /* following add by Victor Yu. 09-02-2002 */
2174                 if (info->IsMoxaMustChipFlag)
2175                         break;
2176                 /* above add by Victor Yu. 09-02-2002 */
2177
2178                 /* mask by Victor Yu. 09-02-2002
2179                  *status = inb(info->base + UART_LSR) & info->read_status_mask;
2180                  */
2181                 /* following add by Victor Yu. 09-02-2002 */
2182                 *status = inb(info->base + UART_LSR);
2183                 /* above add by Victor Yu. 09-02-2002 */
2184         } while (*status & UART_LSR_DR);
2185
2186 end_intr:               /* add by Victor Yu. 09-02-2002 */
2187         mxvar_log.rxcnt[info->port] += cnt;
2188         info->mon_data.rxcnt += cnt;
2189         info->mon_data.up_rxcnt += cnt;
2190         spin_unlock_irqrestore(&info->slock, flags);
2191
2192         tty_flip_buffer_push(tty);
2193 }
2194
2195 static void mxser_transmit_chars(struct mxser_struct *info)
2196 {
2197         int count, cnt;
2198         unsigned long flags;
2199
2200         spin_lock_irqsave(&info->slock, flags);
2201
2202         if (info->x_char) {
2203                 outb(info->x_char, info->base + UART_TX);
2204                 info->x_char = 0;
2205                 mxvar_log.txcnt[info->port]++;
2206                 info->mon_data.txcnt++;
2207                 info->mon_data.up_txcnt++;
2208
2209 /* added by casper 1/11/2000 */
2210                 info->icount.tx++;
2211 /* */
2212                 spin_unlock_irqrestore(&info->slock, flags);
2213                 return;
2214         }
2215
2216         if (info->xmit_buf == 0) {
2217                 spin_unlock_irqrestore(&info->slock, flags);
2218                 return;
2219         }
2220
2221         if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2222                         (info->tty->hw_stopped &&
2223                         (info->type != PORT_16550A) &&
2224                         (!info->IsMoxaMustChipFlag))) {
2225                 info->IER &= ~UART_IER_THRI;
2226                 outb(info->IER, info->base + UART_IER);
2227                 spin_unlock_irqrestore(&info->slock, flags);
2228                 return;
2229         }
2230
2231         cnt = info->xmit_cnt;
2232         count = info->xmit_fifo_size;
2233         do {
2234                 outb(info->xmit_buf[info->xmit_tail++],
2235                         info->base + UART_TX);
2236                 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2237                 if (--info->xmit_cnt <= 0)
2238                         break;
2239         } while (--count > 0);
2240         mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2241
2242 /* added by James 03-12-2004. */
2243         info->mon_data.txcnt += (cnt - info->xmit_cnt);
2244         info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2245 /* (above) added by James. */
2246
2247 /* added by casper 1/11/2000 */
2248         info->icount.tx += (cnt - info->xmit_cnt);
2249 /* */
2250
2251         if (info->xmit_cnt < WAKEUP_CHARS) {
2252                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2253                 schedule_work(&info->tqueue);
2254         }
2255         if (info->xmit_cnt <= 0) {
2256                 info->IER &= ~UART_IER_THRI;
2257                 outb(info->IER, info->base + UART_IER);
2258         }
2259         spin_unlock_irqrestore(&info->slock, flags);
2260 }
2261
2262 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2263 {
2264         /* update input line counters */
2265         if (status & UART_MSR_TERI)
2266                 info->icount.rng++;
2267         if (status & UART_MSR_DDSR)
2268                 info->icount.dsr++;
2269         if (status & UART_MSR_DDCD)
2270                 info->icount.dcd++;
2271         if (status & UART_MSR_DCTS)
2272                 info->icount.cts++;
2273         info->mon_data.modem_status = status;
2274         wake_up_interruptible(&info->delta_msr_wait);
2275
2276         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2277                 if (status & UART_MSR_DCD)
2278                         wake_up_interruptible(&info->open_wait);
2279                 schedule_work(&info->tqueue);
2280         }
2281
2282         if (info->flags & ASYNC_CTS_FLOW) {
2283                 if (info->tty->hw_stopped) {
2284                         if (status & UART_MSR_CTS) {
2285                                 info->tty->hw_stopped = 0;
2286
2287                                 if ((info->type != PORT_16550A) &&
2288                                                 (!info->IsMoxaMustChipFlag)) {
2289                                         info->IER |= UART_IER_THRI;
2290                                         outb(info->IER, info->base + UART_IER);
2291                                 }
2292                                 set_bit(MXSER_EVENT_TXLOW, &info->event);
2293                                 schedule_work(&info->tqueue);                   }
2294                 } else {
2295                         if (!(status & UART_MSR_CTS)) {
2296                                 info->tty->hw_stopped = 1;
2297                                 if ((info->type != PORT_16550A) &&
2298                                                 (!info->IsMoxaMustChipFlag)) {
2299                                         info->IER &= ~UART_IER_THRI;
2300                                         outb(info->IER, info->base + UART_IER);
2301                                 }
2302                         }
2303                 }
2304         }
2305 }
2306
2307 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2308 {
2309         DECLARE_WAITQUEUE(wait, current);
2310         int retval;
2311         int do_clocal = 0;
2312         unsigned long flags;
2313
2314         /*
2315          * If non-blocking mode is set, or the port is not enabled,
2316          * then make the check up front and then exit.
2317          */
2318         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2319                 info->flags |= ASYNC_NORMAL_ACTIVE;
2320                 return 0;
2321         }
2322
2323         if (tty->termios->c_cflag & CLOCAL)
2324                 do_clocal = 1;
2325
2326         /*
2327          * Block waiting for the carrier detect and the line to become
2328          * free (i.e., not in use by the callout).  While we are in
2329          * this loop, info->count is dropped by one, so that
2330          * mxser_close() knows when to free things.  We restore it upon
2331          * exit, either normal or abnormal.
2332          */
2333         retval = 0;
2334         add_wait_queue(&info->open_wait, &wait);
2335
2336         spin_lock_irqsave(&info->slock, flags);
2337         if (!tty_hung_up_p(filp))
2338                 info->count--;
2339         spin_unlock_irqrestore(&info->slock, flags);
2340         info->blocked_open++;
2341         while (1) {
2342                 spin_lock_irqsave(&info->slock, flags);
2343                 outb(inb(info->base + UART_MCR) |
2344                         UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2345                 spin_unlock_irqrestore(&info->slock, flags);
2346                 set_current_state(TASK_INTERRUPTIBLE);
2347                 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2348                         if (info->flags & ASYNC_HUP_NOTIFY)
2349                                 retval = -EAGAIN;
2350                         else
2351                                 retval = -ERESTARTSYS;
2352                         break;
2353                 }
2354                 if (!(info->flags & ASYNC_CLOSING) &&
2355                                 (do_clocal ||
2356                                 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2357                         break;
2358                 if (signal_pending(current)) {
2359                         retval = -ERESTARTSYS;
2360                         break;
2361                 }
2362                 schedule();
2363         }
2364         set_current_state(TASK_RUNNING);
2365         remove_wait_queue(&info->open_wait, &wait);
2366         if (!tty_hung_up_p(filp))
2367                 info->count++;
2368         info->blocked_open--;
2369         if (retval)
2370                 return retval;
2371         info->flags |= ASYNC_NORMAL_ACTIVE;
2372         return 0;
2373 }
2374
2375 static int mxser_startup(struct mxser_struct *info)
2376 {
2377         unsigned long page;
2378         unsigned long flags;
2379
2380         page = __get_free_page(GFP_KERNEL);
2381         if (!page)
2382                 return -ENOMEM;
2383
2384         spin_lock_irqsave(&info->slock, flags);
2385
2386         if (info->flags & ASYNC_INITIALIZED) {
2387                 free_page(page);
2388                 spin_unlock_irqrestore(&info->slock, flags);
2389                 return 0;
2390         }
2391
2392         if (!info->base || !info->type) {
2393                 if (info->tty)
2394                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2395                 free_page(page);
2396                 spin_unlock_irqrestore(&info->slock, flags);
2397                 return 0;
2398         }
2399         if (info->xmit_buf)
2400                 free_page(page);
2401         else
2402                 info->xmit_buf = (unsigned char *) page;
2403
2404         /*
2405          * Clear the FIFO buffers and disable them
2406          * (they will be reenabled in mxser_change_speed())
2407          */
2408         if (info->IsMoxaMustChipFlag)
2409                 outb((UART_FCR_CLEAR_RCVR |
2410                         UART_FCR_CLEAR_XMIT |
2411                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2412         else
2413                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2414                         info->base + UART_FCR);
2415
2416         /*
2417          * At this point there's no way the LSR could still be 0xFF;
2418          * if it is, then bail out, because there's likely no UART
2419          * here.
2420          */
2421         if (inb(info->base + UART_LSR) == 0xff) {
2422                 spin_unlock_irqrestore(&info->slock, flags);
2423                 if (capable(CAP_SYS_ADMIN)) {
2424                         if (info->tty)
2425                                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2426                         return 0;
2427                 } else
2428                         return -ENODEV;
2429         }
2430
2431         /*
2432          * Clear the interrupt registers.
2433          */
2434         (void) inb(info->base + UART_LSR);
2435         (void) inb(info->base + UART_RX);
2436         (void) inb(info->base + UART_IIR);
2437         (void) inb(info->base + UART_MSR);
2438
2439         /*
2440          * Now, initialize the UART
2441          */
2442         outb(UART_LCR_WLEN8, info->base + UART_LCR);    /* reset DLAB */
2443         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2444         outb(info->MCR, info->base + UART_MCR);
2445
2446         /*
2447          * Finally, enable interrupts
2448          */
2449         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2450         /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2451
2452         /* following add by Victor Yu. 08-30-2002 */
2453         if (info->IsMoxaMustChipFlag)
2454                 info->IER |= MOXA_MUST_IER_EGDAI;
2455         /* above add by Victor Yu. 08-30-2002 */
2456         outb(info->IER, info->base + UART_IER); /* enable interrupts */
2457
2458         /*
2459          * And clear the interrupt registers again for luck.
2460          */
2461         (void) inb(info->base + UART_LSR);
2462         (void) inb(info->base + UART_RX);
2463         (void) inb(info->base + UART_IIR);
2464         (void) inb(info->base + UART_MSR);
2465
2466         if (info->tty)
2467                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2468         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2469
2470         /*
2471          * and set the speed of the serial port
2472          */
2473         spin_unlock_irqrestore(&info->slock, flags);
2474         mxser_change_speed(info, NULL);
2475
2476         info->flags |= ASYNC_INITIALIZED;
2477         return 0;
2478 }
2479
2480 /*
2481  * This routine will shutdown a serial port; interrupts maybe disabled, and
2482  * DTR is dropped if the hangup on close termio flag is on.
2483  */
2484 static void mxser_shutdown(struct mxser_struct *info)
2485 {
2486         unsigned long flags;
2487
2488         if (!(info->flags & ASYNC_INITIALIZED))
2489                 return;
2490
2491         spin_lock_irqsave(&info->slock, flags);
2492
2493         /*
2494          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2495          * here so the queue might never be waken up
2496          */
2497         wake_up_interruptible(&info->delta_msr_wait);
2498
2499         /*
2500          * Free the IRQ, if necessary
2501          */
2502         if (info->xmit_buf) {
2503                 free_page((unsigned long) info->xmit_buf);
2504                 info->xmit_buf = NULL;
2505         }
2506
2507         info->IER = 0;
2508         outb(0x00, info->base + UART_IER);
2509
2510         if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2511                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2512         outb(info->MCR, info->base + UART_MCR);
2513
2514         /* clear Rx/Tx FIFO's */
2515         /* following add by Victor Yu. 08-30-2002 */
2516         if (info->IsMoxaMustChipFlag)
2517                 outb((UART_FCR_CLEAR_RCVR |
2518                         UART_FCR_CLEAR_XMIT |
2519                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2520         else
2521                 /* above add by Victor Yu. 08-30-2002 */
2522                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2523                         info->base + UART_FCR);
2524
2525         /* read data port to reset things */
2526         (void) inb(info->base + UART_RX);
2527
2528         if (info->tty)
2529                 set_bit(TTY_IO_ERROR, &info->tty->flags);
2530
2531         info->flags &= ~ASYNC_INITIALIZED;
2532
2533         /* following add by Victor Yu. 09-23-2002 */
2534         if (info->IsMoxaMustChipFlag)
2535                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2536         /* above add by Victor Yu. 09-23-2002 */
2537
2538         spin_unlock_irqrestore(&info->slock, flags);
2539 }
2540
2541 /*
2542  * This routine is called to set the UART divisor registers to match
2543  * the specified baud rate for a serial port.
2544  */
2545 static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_termios)
2546 {
2547         unsigned cflag, cval, fcr;
2548         int ret = 0;
2549         unsigned char status;
2550         long baud;
2551         unsigned long flags;
2552
2553         if (!info->tty || !info->tty->termios)
2554                 return ret;
2555         cflag = info->tty->termios->c_cflag;
2556         if (!(info->base))
2557                 return ret;
2558
2559 #ifndef B921600
2560 #define B921600 (B460800 +1)
2561 #endif
2562         if (mxser_set_baud_method[info->port] == 0) {
2563                 baud = tty_get_baud_rate(info->tty);
2564                 mxser_set_baud(info, baud);
2565         }
2566
2567         /* byte size and parity */
2568         switch (cflag & CSIZE) {
2569         case CS5:
2570                 cval = 0x00;
2571                 break;
2572         case CS6:
2573                 cval = 0x01;
2574                 break;
2575         case CS7:
2576                 cval = 0x02;
2577                 break;
2578         case CS8:
2579                 cval = 0x03;
2580                 break;
2581         default:
2582                 cval = 0x00;
2583                 break;          /* too keep GCC shut... */
2584         }
2585         if (cflag & CSTOPB)
2586                 cval |= 0x04;
2587         if (cflag & PARENB)
2588                 cval |= UART_LCR_PARITY;
2589         if (!(cflag & PARODD))
2590                 cval |= UART_LCR_EPAR;
2591         if (cflag & CMSPAR)
2592                 cval |= UART_LCR_SPAR;
2593
2594         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2595                 if (info->IsMoxaMustChipFlag) {
2596                         fcr = UART_FCR_ENABLE_FIFO;
2597                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2598                         SET_MOXA_MUST_FIFO_VALUE(info);
2599                 } else
2600                         fcr = 0;
2601         } else {
2602                 fcr = UART_FCR_ENABLE_FIFO;
2603                 /* following add by Victor Yu. 08-30-2002 */
2604                 if (info->IsMoxaMustChipFlag) {
2605                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2606                         SET_MOXA_MUST_FIFO_VALUE(info);
2607                 } else {
2608                         /* above add by Victor Yu. 08-30-2002 */
2609                         switch (info->rx_trigger) {
2610                         case 1:
2611                                 fcr |= UART_FCR_TRIGGER_1;
2612                                 break;
2613                         case 4:
2614                                 fcr |= UART_FCR_TRIGGER_4;
2615                                 break;
2616                         case 8:
2617                                 fcr |= UART_FCR_TRIGGER_8;
2618                                 break;
2619                         default:
2620                                 fcr |= UART_FCR_TRIGGER_14;
2621                                 break;
2622                         }
2623                 }
2624         }
2625
2626         /* CTS flow control flag and modem status interrupts */
2627         info->IER &= ~UART_IER_MSI;
2628         info->MCR &= ~UART_MCR_AFE;
2629         if (cflag & CRTSCTS) {
2630                 info->flags |= ASYNC_CTS_FLOW;
2631                 info->IER |= UART_IER_MSI;
2632                 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2633                         info->MCR |= UART_MCR_AFE;
2634                         /* status = mxser_get_msr(info->base, 0, info->port); */
2635 /*
2636         save_flags(flags);
2637         cli();
2638         status = inb(baseaddr + UART_MSR);
2639         restore_flags(flags);
2640 */
2641                         /* mxser_check_modem_status(info, status); */
2642                 } else {
2643                         /* status = mxser_get_msr(info->base, 0, info->port); */
2644                         /* MX_LOCK(&info->slock); */
2645                         status = inb(info->base + UART_MSR);
2646                         /* MX_UNLOCK(&info->slock); */
2647                         if (info->tty->hw_stopped) {
2648                                 if (status & UART_MSR_CTS) {
2649                                         info->tty->hw_stopped = 0;
2650                                         if ((info->type != PORT_16550A) &&
2651                                                         (!info->IsMoxaMustChipFlag)) {
2652                                                 info->IER |= UART_IER_THRI;
2653                                                 outb(info->IER, info->base + UART_IER);
2654                                         }
2655                                         set_bit(MXSER_EVENT_TXLOW, &info->event);
2656                                         schedule_work(&info->tqueue);                           }
2657                         } else {
2658                                 if (!(status & UART_MSR_CTS)) {
2659                                         info->tty->hw_stopped = 1;
2660                                         if ((info->type != PORT_16550A) &&
2661                                                         (!info->IsMoxaMustChipFlag)) {
2662                                                 info->IER &= ~UART_IER_THRI;
2663                                                 outb(info->IER, info->base + UART_IER);
2664                                         }
2665                                 }
2666                         }
2667                 }
2668         } else {
2669                 info->flags &= ~ASYNC_CTS_FLOW;
2670         }
2671         outb(info->MCR, info->base + UART_MCR);
2672         if (cflag & CLOCAL) {
2673                 info->flags &= ~ASYNC_CHECK_CD;
2674         } else {
2675                 info->flags |= ASYNC_CHECK_CD;
2676                 info->IER |= UART_IER_MSI;
2677         }
2678         outb(info->IER, info->base + UART_IER);
2679
2680         /*
2681          * Set up parity check flag
2682          */
2683         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2684         if (I_INPCK(info->tty))
2685                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2686         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2687                 info->read_status_mask |= UART_LSR_BI;
2688
2689         info->ignore_status_mask = 0;
2690
2691         if (I_IGNBRK(info->tty)) {
2692                 info->ignore_status_mask |= UART_LSR_BI;
2693                 info->read_status_mask |= UART_LSR_BI;
2694                 /*
2695                  * If we're ignore parity and break indicators, ignore
2696                  * overruns too.  (For real raw support).
2697                  */
2698                 if (I_IGNPAR(info->tty)) {
2699                         info->ignore_status_mask |=
2700                                                 UART_LSR_OE |
2701                                                 UART_LSR_PE |
2702                                                 UART_LSR_FE;
2703                         info->read_status_mask |=
2704                                                 UART_LSR_OE |
2705                                                 UART_LSR_PE |
2706                                                 UART_LSR_FE;
2707                 }
2708         }
2709         /* following add by Victor Yu. 09-02-2002 */
2710         if (info->IsMoxaMustChipFlag) {
2711                 spin_lock_irqsave(&info->slock, flags);
2712                 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2713                 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2714                 if (I_IXON(info->tty)) {
2715                         ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2716                 } else {
2717                         DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2718                 }
2719                 if (I_IXOFF(info->tty)) {
2720                         ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2721                 } else {
2722                         DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2723                 }
2724                 /*
2725                    if ( I_IXANY(info->tty) ) {
2726                    info->MCR |= MOXA_MUST_MCR_XON_ANY;
2727                    ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2728                    } else {
2729                    info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2730                    DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2731                    }
2732                  */
2733                 spin_unlock_irqrestore(&info->slock, flags);
2734         }
2735         /* above add by Victor Yu. 09-02-2002 */
2736
2737
2738         outb(fcr, info->base + UART_FCR);       /* set fcr */
2739         outb(cval, info->base + UART_LCR);
2740
2741         return ret;
2742 }
2743
2744
2745 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2746 {
2747         int quot = 0;
2748         unsigned char cval;
2749         int ret = 0;
2750         unsigned long flags;
2751
2752         if (!info->tty || !info->tty->termios)
2753                 return ret;
2754
2755         if (!(info->base))
2756                 return ret;
2757
2758         if (newspd > info->MaxCanSetBaudRate)
2759                 return 0;
2760
2761         info->realbaud = newspd;
2762         if (newspd == 134) {
2763                 quot = (2 * info->baud_base / 269);
2764         } else if (newspd) {
2765                 quot = info->baud_base / newspd;
2766                 if (quot == 0)
2767                         quot = 1;
2768         } else {
2769                 quot = 0;
2770         }
2771
2772         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2773         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
2774
2775         if (quot) {
2776                 spin_lock_irqsave(&info->slock, flags);
2777                 info->MCR |= UART_MCR_DTR;
2778                 outb(info->MCR, info->base + UART_MCR);
2779                 spin_unlock_irqrestore(&info->slock, flags);
2780         } else {
2781                 spin_lock_irqsave(&info->slock, flags);
2782                 info->MCR &= ~UART_MCR_DTR;
2783                 outb(info->MCR, info->base + UART_MCR);
2784                 spin_unlock_irqrestore(&info->slock, flags);
2785                 return ret;
2786         }
2787
2788         cval = inb(info->base + UART_LCR);
2789
2790         outb(cval | UART_LCR_DLAB, info->base + UART_LCR);      /* set DLAB */
2791
2792         outb(quot & 0xff, info->base + UART_DLL);       /* LS of divisor */
2793         outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2794         outb(cval, info->base + UART_LCR);      /* reset DLAB */
2795
2796
2797         return ret;
2798 }
2799
2800 /*
2801  * ------------------------------------------------------------
2802  * friends of mxser_ioctl()
2803  * ------------------------------------------------------------
2804  */
2805 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2806 {
2807         struct serial_struct tmp;
2808
2809         if (!retinfo)
2810                 return -EFAULT;
2811         memset(&tmp, 0, sizeof(tmp));
2812         tmp.type = info->type;
2813         tmp.line = info->port;
2814         tmp.port = info->base;
2815         tmp.irq = info->irq;
2816         tmp.flags = info->flags;
2817         tmp.baud_base = info->baud_base;
2818         tmp.close_delay = info->close_delay;
2819         tmp.closing_wait = info->closing_wait;
2820         tmp.custom_divisor = info->custom_divisor;
2821         tmp.hub6 = 0;
2822         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2823                 return -EFAULT;
2824         return 0;
2825 }
2826
2827 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2828 {
2829         struct serial_struct new_serial;
2830         unsigned int flags;
2831         int retval = 0;
2832
2833         if (!new_info || !info->base)
2834                 return -EFAULT;
2835         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2836                 return -EFAULT;
2837
2838         if ((new_serial.irq != info->irq) ||
2839                         (new_serial.port != info->base) ||
2840                         (new_serial.custom_divisor != info->custom_divisor) ||
2841                         (new_serial.baud_base != info->baud_base))
2842                 return -EPERM;
2843
2844         flags = info->flags & ASYNC_SPD_MASK;
2845
2846         if (!capable(CAP_SYS_ADMIN)) {
2847                 if ((new_serial.baud_base != info->baud_base) ||
2848                                 (new_serial.close_delay != info->close_delay) ||
2849                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2850                         return -EPERM;
2851                 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2852                                 (new_serial.flags & ASYNC_USR_MASK));
2853         } else {
2854                 /*
2855                  * OK, past this point, all the error checking has been done.
2856                  * At this point, we start making changes.....
2857                  */
2858                 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2859                                 (new_serial.flags & ASYNC_FLAGS));
2860                 info->close_delay = new_serial.close_delay * HZ / 100;
2861                 info->closing_wait = new_serial.closing_wait * HZ / 100;
2862                 info->tty->low_latency =
2863                                 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2864                 info->tty->low_latency = 0;     /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2865         }
2866
2867         /* added by casper, 3/17/2000, for mouse */
2868         info->type = new_serial.type;
2869
2870         process_txrx_fifo(info);
2871
2872         if (info->flags & ASYNC_INITIALIZED) {
2873                 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2874                         mxser_change_speed(info, NULL);
2875                 }
2876         } else {
2877                 retval = mxser_startup(info);
2878         }
2879         return retval;
2880 }
2881
2882 /*
2883  * mxser_get_lsr_info - get line status register info
2884  *
2885  * Purpose: Let user call ioctl() to get info when the UART physically
2886  *          is emptied.  On bus types like RS485, the transmitter must
2887  *          release the bus after transmitting. This must be done when
2888  *          the transmit shift register is empty, not be done when the
2889  *          transmit holding register is empty.  This functionality
2890  *          allows an RS485 driver to be written in user space.
2891  */
2892 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2893 {
2894         unsigned char status;
2895         unsigned int result;
2896         unsigned long flags;
2897
2898         spin_lock_irqsave(&info->slock, flags);
2899         status = inb(info->base + UART_LSR);
2900         spin_unlock_irqrestore(&info->slock, flags);
2901         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2902         return put_user(result, value);
2903 }
2904
2905 /*
2906  * This routine sends a break character out the serial port.
2907  */
2908 static void mxser_send_break(struct mxser_struct *info, int duration)
2909 {
2910         unsigned long flags;
2911
2912         if (!info->base)
2913                 return;
2914         set_current_state(TASK_INTERRUPTIBLE);
2915         spin_lock_irqsave(&info->slock, flags);
2916         outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2917                 info->base + UART_LCR);
2918         spin_unlock_irqrestore(&info->slock, flags);
2919         schedule_timeout(duration);
2920         spin_lock_irqsave(&info->slock, flags);
2921         outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2922                 info->base + UART_LCR);
2923         spin_unlock_irqrestore(&info->slock, flags);
2924 }
2925
2926 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2927 {
2928         struct mxser_struct *info = tty->driver_data;
2929         unsigned char control, status;
2930         unsigned long flags;
2931
2932
2933         if (tty->index == MXSER_PORTS)
2934                 return -ENOIOCTLCMD;
2935         if (tty->flags & (1 << TTY_IO_ERROR))
2936                 return -EIO;
2937
2938         control = info->MCR;
2939
2940         spin_lock_irqsave(&info->slock, flags);
2941         status = inb(info->base + UART_MSR);
2942         if (status & UART_MSR_ANY_DELTA)
2943                 mxser_check_modem_status(info, status);
2944         spin_unlock_irqrestore(&info->slock, flags);
2945         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2946                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2947                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2948                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2949                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2950                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2951 }
2952
2953 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2954 {
2955         struct mxser_struct *info = tty->driver_data;
2956         unsigned long flags;
2957
2958
2959         if (tty->index == MXSER_PORTS)
2960                 return -ENOIOCTLCMD;
2961         if (tty->flags & (1 << TTY_IO_ERROR))
2962                 return -EIO;
2963
2964         spin_lock_irqsave(&info->slock, flags);
2965
2966         if (set & TIOCM_RTS)
2967                 info->MCR |= UART_MCR_RTS;
2968         if (set & TIOCM_DTR)
2969                 info->MCR |= UART_MCR_DTR;
2970
2971         if (clear & TIOCM_RTS)
2972                 info->MCR &= ~UART_MCR_RTS;
2973         if (clear & TIOCM_DTR)
2974                 info->MCR &= ~UART_MCR_DTR;
2975
2976         outb(info->MCR, info->base + UART_MCR);
2977         spin_unlock_irqrestore(&info->slock, flags);
2978         return 0;
2979 }
2980
2981
2982 static int mxser_read_register(int, unsigned short *);
2983 static int mxser_program_mode(int);
2984 static void mxser_normal_mode(int);
2985
2986 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2987 {
2988         int id, i, bits;
2989         unsigned short regs[16], irq;
2990         unsigned char scratch, scratch2;
2991
2992         hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2993
2994         id = mxser_read_register(cap, regs);
2995         if (id == C168_ASIC_ID) {
2996                 hwconf->board_type = MXSER_BOARD_C168_ISA;
2997                 hwconf->ports = 8;
2998         } else if (id == C104_ASIC_ID) {
2999                 hwconf->board_type = MXSER_BOARD_C104_ISA;
3000                 hwconf->ports = 4;
3001         } else if (id == C102_ASIC_ID) {
3002                 hwconf->board_type = MXSER_BOARD_C102_ISA;
3003                 hwconf->ports = 2;
3004         } else if (id == CI132_ASIC_ID) {
3005                 hwconf->board_type = MXSER_BOARD_CI132;
3006                 hwconf->ports = 2;
3007         } else if (id == CI134_ASIC_ID) {
3008                 hwconf->board_type = MXSER_BOARD_CI134;
3009                 hwconf->ports = 4;
3010         } else if (id == CI104J_ASIC_ID) {
3011                 hwconf->board_type = MXSER_BOARD_CI104J;
3012                 hwconf->ports = 4;
3013         } else
3014                 return 0;
3015
3016         irq = 0;
3017         if (hwconf->ports == 2) {
3018                 irq = regs[9] & 0xF000;
3019                 irq = irq | (irq >> 4);
3020                 if (irq != (regs[9] & 0xFF00))
3021                         return MXSER_ERR_IRQ_CONFLIT;
3022         } else if (hwconf->ports == 4) {
3023                 irq = regs[9] & 0xF000;
3024                 irq = irq | (irq >> 4);
3025                 irq = irq | (irq >> 8);
3026                 if (irq != regs[9])
3027                         return MXSER_ERR_IRQ_CONFLIT;
3028         } else if (hwconf->ports == 8) {
3029                 irq = regs[9] & 0xF000;
3030                 irq = irq | (irq >> 4);
3031                 irq = irq | (irq >> 8);
3032                 if ((irq != regs[9]) || (irq != regs[10]))
3033                         return MXSER_ERR_IRQ_CONFLIT;
3034         }
3035
3036         if (!irq)
3037                 return MXSER_ERR_IRQ;
3038         hwconf->irq = ((int)(irq & 0xF000) >> 12);
3039         for (i = 0; i < 8; i++)
3040                 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3041         if ((regs[12] & 0x80) == 0)
3042                 return MXSER_ERR_VECTOR;
3043         hwconf->vector = (int)regs[11]; /* interrupt vector */
3044         if (id == 1)
3045                 hwconf->vector_mask = 0x00FF;
3046         else
3047                 hwconf->vector_mask = 0x000F;
3048         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3049                 if (regs[12] & bits) {
3050                         hwconf->baud_base[i] = 921600;
3051                         hwconf->MaxCanSetBaudRate[i] = 921600;  /* add by Victor Yu. 09-04-2002 */
3052                 } else {
3053                         hwconf->baud_base[i] = 115200;
3054                         hwconf->MaxCanSetBaudRate[i] = 115200;  /* add by Victor Yu. 09-04-2002 */
3055                 }
3056         }
3057         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3058         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3059         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
3060         outb(scratch2, cap + UART_LCR);
3061         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3062         scratch = inb(cap + UART_IIR);
3063
3064         if (scratch & 0xC0)
3065                 hwconf->uart_type = PORT_16550A;
3066         else
3067                 hwconf->uart_type = PORT_16450;
3068         if (id == 1)
3069                 hwconf->ports = 8;
3070         else
3071                 hwconf->ports = 4;
3072         request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3073         request_region(hwconf->vector, 1, "mxser(vector)");
3074         return hwconf->ports;
3075 }
3076
3077 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
3078 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
3079 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
3080 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
3081 #define EN_CCMD         0x000   /* Chip's command register     */
3082 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
3083 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
3084 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
3085 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
3086 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
3087 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
3088 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
3089 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
3090 static int mxser_read_register(int port, unsigned short *regs)
3091 {
3092         int i, k, value, id;
3093         unsigned int j;
3094
3095         id = mxser_program_mode(port);
3096         if (id < 0)
3097                 return id;
3098         for (i = 0; i < 14; i++) {
3099                 k = (i & 0x3F) | 0x180;
3100                 for (j = 0x100; j > 0; j >>= 1) {
3101                         outb(CHIP_CS, port);
3102                         if (k & j) {
3103                                 outb(CHIP_CS | CHIP_DO, port);
3104                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
3105                         } else {
3106                                 outb(CHIP_CS, port);
3107                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
3108                         }
3109                 }
3110                 (void)inb(port);
3111                 value = 0;
3112                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3113                         outb(CHIP_CS, port);
3114                         outb(CHIP_CS | CHIP_SK, port);
3115                         if (inb(port) & CHIP_DI)
3116                                 value |= j;
3117                 }
3118                 regs[i] = value;
3119                 outb(0, port);
3120         }
3121         mxser_normal_mode(port);
3122         return id;
3123 }
3124
3125 static int mxser_program_mode(int port)
3126 {
3127         int id, i, j, n;
3128         /* unsigned long flags; */
3129
3130         spin_lock(&gm_lock);
3131         outb(0, port);
3132         outb(0, port);
3133         outb(0, port);
3134         (void)inb(port);
3135         (void)inb(port);
3136         outb(0, port);
3137         (void)inb(port);
3138         /* restore_flags(flags); */
3139         spin_unlock(&gm_lock);
3140
3141         id = inb(port + 1) & 0x1F;
3142         if ((id != C168_ASIC_ID) &&
3143                         (id != C104_ASIC_ID) &&
3144                         (id != C102_ASIC_ID) &&
3145                         (id != CI132_ASIC_ID) &&
3146                         (id != CI134_ASIC_ID) &&
3147                         (id != CI104J_ASIC_ID))
3148                 return -1;
3149         for (i = 0, j = 0; i < 4; i++) {
3150                 n = inb(port + 2);
3151                 if (n == 'M') {
3152                         j = 1;
3153                 } else if ((j == 1) && (n == 1)) {
3154                         j = 2;
3155                         break;
3156                 } else
3157                         j = 0;
3158         }
3159         if (j != 2)
3160                 id = -2;
3161         return id;
3162 }
3163
3164 static void mxser_normal_mode(int port)
3165 {
3166         int i, n;
3167
3168         outb(0xA5, port + 1);
3169         outb(0x80, port + 3);
3170         outb(12, port + 0);     /* 9600 bps */
3171         outb(0, port + 1);
3172         outb(0x03, port + 3);   /* 8 data bits */
3173         outb(0x13, port + 4);   /* loop back mode */
3174         for (i = 0; i < 16; i++) {
3175                 n = inb(port + 5);
3176                 if ((n & 0x61) == 0x60)
3177                         break;
3178                 if ((n & 1) == 1)
3179                         (void)inb(port);
3180         }
3181         outb(0x00, port + 4);
3182 }
3183
3184 module_init(mxser_module_init);
3185 module_exit(mxser_module_exit);