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