SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/char/mxser.c

   1 /*
   2  *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3  *
   4  *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com).
   5  *      Copyright (C) 2006-2008  Jiri Slaby <jirislaby@gmail.com>
   6  *
   7  *      This code is loosely based on the 1.8 moxa driver which is based on
   8  *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9  *      others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17  *      <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
  18  *      www.moxa.com.
  19  *      - Fixed x86_64 cleanness
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/errno.h>
  24 #include <linux/signal.h>
  25 #include <linux/sched.h>
  26 #include <linux/smp_lock.h>
  27 #include <linux/timer.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/serial.h>
  32 #include <linux/serial_reg.h>
  33 #include <linux/major.h>
  34 #include <linux/string.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/ptrace.h>
  37 #include <linux/gfp.h>
  38 #include <linux/ioport.h>
  39 #include <linux/mm.h>
  40 #include <linux/delay.h>
  41 #include <linux/pci.h>
  42 #include <linux/bitops.h>
  43
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/uaccess.h>
  48
  49 #include "mxser.h"
  50
  51 #define MXSER_VERSION   "2.0.5"         /* 1.14 */
  52 #define MXSERMAJOR       174
  53
  54 #define MXSER_BOARDS            4       /* Max. boards */
  55 #define MXSER_PORTS_PER_BOARD   8       /* Max. ports per board */
  56 #define MXSER_PORTS             (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
  57 #define MXSER_ISR_PASS_LIMIT    100
  58
  59 /*CheckIsMoxaMust return value*/
  60 #define MOXA_OTHER_UART         0x00
  61 #define MOXA_MUST_MU150_HWID    0x01
  62 #define MOXA_MUST_MU860_HWID    0x02
  63
  64 #define WAKEUP_CHARS            256
  65
  66 #define UART_MCR_AFE            0x20
  67 #define UART_LSR_SPECIAL        0x1E
  68
  69 #define PCI_DEVICE_ID_POS104UL  0x1044
  70 #define PCI_DEVICE_ID_CB108     0x1080
  71 #define PCI_DEVICE_ID_CP102UF   0x1023
  72 #define PCI_DEVICE_ID_CP112UL   0x1120
  73 #define PCI_DEVICE_ID_CB114     0x1142
  74 #define PCI_DEVICE_ID_CP114UL   0x1143
  75 #define PCI_DEVICE_ID_CB134I    0x1341
  76 #define PCI_DEVICE_ID_CP138U    0x1380
  77
  78
  79 #define C168_ASIC_ID    1
  80 #define C104_ASIC_ID    2
  81 #define C102_ASIC_ID    0xB
  82 #define CI132_ASIC_ID   4
  83 #define CI134_ASIC_ID   3
  84 #define CI104J_ASIC_ID  5
  85
  86 #define MXSER_HIGHBAUD  1
  87 #define MXSER_HAS2      2
  88
  89 /* This is only for PCI */
  90 static const struct {
  91         int type;
  92         int tx_fifo;
  93         int rx_fifo;
  94         int xmit_fifo_size;
  95         int rx_high_water;
  96         int rx_trigger;
  97         int rx_low_water;
  98         long max_baud;
  99 } Gpci_uart_info[] = {
 100         {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
 101         {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
 102         {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
 103 };
 104 #define UART_INFO_NUM   ARRAY_SIZE(Gpci_uart_info)
 105
 106 struct mxser_cardinfo {
 107         char *name;
 108         unsigned int nports;
 109         unsigned int flags;
 110 };
 111
 112 static const struct mxser_cardinfo mxser_cards[] = {
 113 /* 0*/  { "C168 series",        8, },
 114         { "C104 series",        4, },
 115         { "CI-104J series",     4, },
 116         { "C168H/PCI series",   8, },
 117         { "C104H/PCI series",   4, },
 118 /* 5*/  { "C102 series",        4, MXSER_HAS2 },        /* C102-ISA */
 119         { "CI-132 series",      4, MXSER_HAS2 },
 120         { "CI-134 series",      4, },
 121         { "CP-132 series",      2, },
 122         { "CP-114 series",      4, },
 123 /*10*/  { "CT-114 series",      4, },
 124         { "CP-102 series",      2, MXSER_HIGHBAUD },
 125         { "CP-104U series",     4, },
 126         { "CP-168U series",     8, },
 127         { "CP-132U series",     2, },
 128 /*15*/  { "CP-134U series",     4, },
 129         { "CP-104JU series",    4, },
 130         { "Moxa UC7000 Serial", 8, },           /* RC7000 */
 131         { "CP-118U series",     8, },
 132         { "CP-102UL series",    2, },
 133 /*20*/  { "CP-102U series",     2, },
 134         { "CP-118EL series",    8, },
 135         { "CP-168EL series",    8, },
 136         { "CP-104EL series",    4, },
 137         { "CB-108 series",      8, },
 138 /*25*/  { "CB-114 series",      4, },
 139         { "CB-134I series",     4, },
 140         { "CP-138U series",     8, },
 141         { "POS-104UL series",   4, },
 142         { "CP-114UL series",    4, },
 143 /*30*/  { "CP-102UF series",    2, },
 144         { "CP-112UL series",    2, },
 145 };
 146
 147 /* driver_data correspond to the lines in the structure above
 148    see also ISA probe function before you change something */
 149 static struct pci_device_id mxser_pcibrds[] = {
 150         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168),   .driver_data = 3 },
 151         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104),   .driver_data = 4 },
 152         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132),  .driver_data = 8 },
 153         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114),  .driver_data = 9 },
 154         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114),  .driver_data = 10 },
 155         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102),  .driver_data = 11 },
 156         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
 157         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
 158         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
 159         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
 160         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
 161         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
 162         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
 163         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
 164         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
 165         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
 166         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
 167         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
 168         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108),       .driver_data = 24 },
 169         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114),       .driver_data = 25 },
 170         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I),      .driver_data = 26 },
 171         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U),      .driver_data = 27 },
 172         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL),    .driver_data = 28 },
 173         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL),     .driver_data = 29 },
 174         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF),     .driver_data = 30 },
 175         { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL),     .driver_data = 31 },
 176         { }
 177 };
 178 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 179
 180 static unsigned long ioaddr[MXSER_BOARDS];
 181 static int ttymajor = MXSERMAJOR;
 182
 183 /* Variables for insmod */
 184
 185 MODULE_AUTHOR("Casper Yang");
 186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 187 module_param_array(ioaddr, ulong, NULL, 0);
 188 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
 189 module_param(ttymajor, int, 0);
 190 MODULE_LICENSE("GPL");
 191
 192 struct mxser_log {
 193         int tick;
 194         unsigned long rxcnt[MXSER_PORTS];
 195         unsigned long txcnt[MXSER_PORTS];
 196 };
 197
 198 struct mxser_mon {
 199         unsigned long rxcnt;
 200         unsigned long txcnt;
 201         unsigned long up_rxcnt;
 202         unsigned long up_txcnt;
 203         int modem_status;
 204         unsigned char hold_reason;
 205 };
 206
 207 struct mxser_mon_ext {
 208         unsigned long rx_cnt[32];
 209         unsigned long tx_cnt[32];
 210         unsigned long up_rxcnt[32];
 211         unsigned long up_txcnt[32];
 212         int modem_status[32];
 213
 214         long baudrate[32];
 215         int databits[32];
 216         int stopbits[32];
 217         int parity[32];
 218         int flowctrl[32];
 219         int fifo[32];
 220         int iftype[32];
 221 };
 222
 223 struct mxser_board;
 224
 225 struct mxser_port {
 226         struct tty_port port;
 227         struct mxser_board *board;
 228
 229         unsigned long ioaddr;
 230         unsigned long opmode_ioaddr;
 231         int max_baud;
 232
 233         int rx_high_water;
 234         int rx_trigger;         /* Rx fifo trigger level */
 235         int rx_low_water;
 236         int baud_base;          /* max. speed */
 237         int type;               /* UART type */
 238
 239         int x_char;             /* xon/xoff character */
 240         int IER;                /* Interrupt Enable Register */
 241         int MCR;                /* Modem control register */
 242
 243         unsigned char stop_rx;
 244         unsigned char ldisc_stop_rx;
 245
 246         int custom_divisor;
 247         unsigned char err_shadow;
 248
 249         struct async_icount icount; /* kernel counters for 4 input interrupts */
 250         int timeout;
 251
 252         int read_status_mask;
 253         int ignore_status_mask;
 254         int xmit_fifo_size;
 255         int xmit_head;
 256         int xmit_tail;
 257         int xmit_cnt;
 258
 259         struct ktermios normal_termios;
 260
 261         struct mxser_mon mon_data;
 262
 263         spinlock_t slock;
 264 };
 265
 266 struct mxser_board {
 267         unsigned int idx;
 268         int irq;
 269         const struct mxser_cardinfo *info;
 270         unsigned long vector;
 271         unsigned long vector_mask;
 272
 273         int chip_flag;
 274         int uart_type;
 275
 276         struct mxser_port ports[MXSER_PORTS_PER_BOARD];
 277 };
 278
 279 struct mxser_mstatus {
 280         tcflag_t cflag;
 281         int cts;
 282         int dsr;
 283         int ri;
 284         int dcd;
 285 };
 286
 287 static struct mxser_board mxser_boards[MXSER_BOARDS];
 288 static struct tty_driver *mxvar_sdriver;
 289 static struct mxser_log mxvar_log;
 290 static int mxser_set_baud_method[MXSER_PORTS + 1];
 291
 292 static void mxser_enable_must_enchance_mode(unsigned long baseio)
 293 {
 294         u8 oldlcr;
 295         u8 efr;
 296
 297         oldlcr = inb(baseio + UART_LCR);
 298         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 299
 300         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 301         efr |= MOXA_MUST_EFR_EFRB_ENABLE;
 302
 303         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 304         outb(oldlcr, baseio + UART_LCR);
 305 }
 306
 307 static void mxser_disable_must_enchance_mode(unsigned long baseio)
 308 {
 309         u8 oldlcr;
 310         u8 efr;
 311
 312         oldlcr = inb(baseio + UART_LCR);
 313         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 314
 315         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 316         efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
 317
 318         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 319         outb(oldlcr, baseio + UART_LCR);
 320 }
 321
 322 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
 323 {
 324         u8 oldlcr;
 325         u8 efr;
 326
 327         oldlcr = inb(baseio + UART_LCR);
 328         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 329
 330         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 331         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 332         efr |= MOXA_MUST_EFR_BANK0;
 333
 334         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 335         outb(value, baseio + MOXA_MUST_XON1_REGISTER);
 336         outb(oldlcr, baseio + UART_LCR);
 337 }
 338
 339 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
 340 {
 341         u8 oldlcr;
 342         u8 efr;
 343
 344         oldlcr = inb(baseio + UART_LCR);
 345         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 346
 347         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 348         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 349         efr |= MOXA_MUST_EFR_BANK0;
 350
 351         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 352         outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
 353         outb(oldlcr, baseio + UART_LCR);
 354 }
 355
 356 static void mxser_set_must_fifo_value(struct mxser_port *info)
 357 {
 358         u8 oldlcr;
 359         u8 efr;
 360
 361         oldlcr = inb(info->ioaddr + UART_LCR);
 362         outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
 363
 364         efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
 365         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 366         efr |= MOXA_MUST_EFR_BANK1;
 367
 368         outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
 369         outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
 370         outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
 371         outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
 372         outb(oldlcr, info->ioaddr + UART_LCR);
 373 }
 374
 375 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
 376 {
 377         u8 oldlcr;
 378         u8 efr;
 379
 380         oldlcr = inb(baseio + UART_LCR);
 381         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 382
 383         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 384         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 385         efr |= MOXA_MUST_EFR_BANK2;
 386
 387         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 388         outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
 389         outb(oldlcr, baseio + UART_LCR);
 390 }
 391
 392 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
 393 {
 394         u8 oldlcr;
 395         u8 efr;
 396
 397         oldlcr = inb(baseio + UART_LCR);
 398         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 399
 400         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 401         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 402         efr |= MOXA_MUST_EFR_BANK2;
 403
 404         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 405         *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
 406         outb(oldlcr, baseio + UART_LCR);
 407 }
 408
 409 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
 410 {
 411         u8 oldlcr;
 412         u8 efr;
 413
 414         oldlcr = inb(baseio + UART_LCR);
 415         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 416
 417         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 418         efr &= ~MOXA_MUST_EFR_SF_MASK;
 419
 420         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 421         outb(oldlcr, baseio + UART_LCR);
 422 }
 423
 424 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
 425 {
 426         u8 oldlcr;
 427         u8 efr;
 428
 429         oldlcr = inb(baseio + UART_LCR);
 430         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 431
 432         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 433         efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 434         efr |= MOXA_MUST_EFR_SF_TX1;
 435
 436         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 437         outb(oldlcr, baseio + UART_LCR);
 438 }
 439
 440 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
 441 {
 442         u8 oldlcr;
 443         u8 efr;
 444
 445         oldlcr = inb(baseio + UART_LCR);
 446         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 447
 448         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 449         efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 450
 451         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 452         outb(oldlcr, baseio + UART_LCR);
 453 }
 454
 455 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
 456 {
 457         u8 oldlcr;
 458         u8 efr;
 459
 460         oldlcr = inb(baseio + UART_LCR);
 461         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 462
 463         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 464         efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 465         efr |= MOXA_MUST_EFR_SF_RX1;
 466
 467         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 468         outb(oldlcr, baseio + UART_LCR);
 469 }
 470
 471 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
 472 {
 473         u8 oldlcr;
 474         u8 efr;
 475
 476         oldlcr = inb(baseio + UART_LCR);
 477         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 478
 479         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 480         efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 481
 482         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 483         outb(oldlcr, baseio + UART_LCR);
 484 }
 485
 486 #ifdef CONFIG_PCI
 487 static int __devinit CheckIsMoxaMust(unsigned long io)
 488 {
 489         u8 oldmcr, hwid;
 490         int i;
 491
 492         outb(0, io + UART_LCR);
 493         mxser_disable_must_enchance_mode(io);
 494         oldmcr = inb(io + UART_MCR);
 495         outb(0, io + UART_MCR);
 496         mxser_set_must_xon1_value(io, 0x11);
 497         if ((hwid = inb(io + UART_MCR)) != 0) {
 498                 outb(oldmcr, io + UART_MCR);
 499                 return MOXA_OTHER_UART;
 500         }
 501
 502         mxser_get_must_hardware_id(io, &hwid);
 503         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 504                 if (hwid == Gpci_uart_info[i].type)
 505                         return (int)hwid;
 506         }
 507         return MOXA_OTHER_UART;
 508 }
 509 #endif
 510
 511 static void process_txrx_fifo(struct mxser_port *info)
 512 {
 513         int i;
 514
 515         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 516                 info->rx_trigger = 1;
 517                 info->rx_high_water = 1;
 518                 info->rx_low_water = 1;
 519                 info->xmit_fifo_size = 1;
 520         } else
 521                 for (i = 0; i < UART_INFO_NUM; i++)
 522                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 523                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 524                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 525                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 526                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 527                                 break;
 528                         }
 529 }
 530
 531 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 532 {
 533         static unsigned char mxser_msr[MXSER_PORTS + 1];
 534         unsigned char status = 0;
 535
 536         status = inb(baseaddr + UART_MSR);
 537
 538         mxser_msr[port] &= 0x0F;
 539         mxser_msr[port] |= status;
 540         status = mxser_msr[port];
 541         if (mode)
 542                 mxser_msr[port] = 0;
 543
 544         return status;
 545 }
 546
 547 static int mxser_carrier_raised(struct tty_port *port)
 548 {
 549         struct mxser_port *mp = container_of(port, struct mxser_port, port);
 550         return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 551 }
 552
 553 static void mxser_dtr_rts(struct tty_port *port, int on)
 554 {
 555         struct mxser_port *mp = container_of(port, struct mxser_port, port);
 556         unsigned long flags;
 557
 558         spin_lock_irqsave(&mp->slock, flags);
 559         if (on)
 560                 outb(inb(mp->ioaddr + UART_MCR) |
 561                         UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
 562         else
 563                 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
 564                         mp->ioaddr + UART_MCR);
 565         spin_unlock_irqrestore(&mp->slock, flags);
 566 }
 567
 568 static int mxser_set_baud(struct tty_struct *tty, long newspd)
 569 {
 570         struct mxser_port *info = tty->driver_data;
 571         int quot = 0, baud;
 572         unsigned char cval;
 573
 574         if (!info->ioaddr)
 575                 return -1;
 576
 577         if (newspd > info->max_baud)
 578                 return -1;
 579
 580         if (newspd == 134) {
 581                 quot = 2 * info->baud_base / 269;
 582                 tty_encode_baud_rate(tty, 134, 134);
 583         } else if (newspd) {
 584                 quot = info->baud_base / newspd;
 585                 if (quot == 0)
 586                         quot = 1;
 587                 baud = info->baud_base/quot;
 588                 tty_encode_baud_rate(tty, baud, baud);
 589         } else {
 590                 quot = 0;
 591         }
 592
 593         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 594         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 595
 596         if (quot) {
 597                 info->MCR |= UART_MCR_DTR;
 598                 outb(info->MCR, info->ioaddr + UART_MCR);
 599         } else {
 600                 info->MCR &= ~UART_MCR_DTR;
 601                 outb(info->MCR, info->ioaddr + UART_MCR);
 602                 return 0;
 603         }
 604
 605         cval = inb(info->ioaddr + UART_LCR);
 606
 607         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 608
 609         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 610         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 611         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 612
 613 #ifdef BOTHER
 614         if (C_BAUD(tty) == BOTHER) {
 615                 quot = info->baud_base % newspd;
 616                 quot *= 8;
 617                 if (quot % newspd > newspd / 2) {
 618                         quot /= newspd;
 619                         quot++;
 620                 } else
 621                         quot /= newspd;
 622
 623                 mxser_set_must_enum_value(info->ioaddr, quot);
 624         } else
 625 #endif
 626                 mxser_set_must_enum_value(info->ioaddr, 0);
 627
 628         return 0;
 629 }
 630
 631 /*
 632  * This routine is called to set the UART divisor registers to match
 633  * the specified baud rate for a serial port.
 634  */
 635 static int mxser_change_speed(struct tty_struct *tty,
 636                                         struct ktermios *old_termios)
 637 {
 638         struct mxser_port *info = tty->driver_data;
 639         unsigned cflag, cval, fcr;
 640         int ret = 0;
 641         unsigned char status;
 642
 643         cflag = tty->termios->c_cflag;
 644         if (!info->ioaddr)
 645                 return ret;
 646
 647         if (mxser_set_baud_method[tty->index] == 0)
 648                 mxser_set_baud(tty, tty_get_baud_rate(tty));
 649
 650         /* byte size and parity */
 651         switch (cflag & CSIZE) {
 652         case CS5:
 653                 cval = 0x00;
 654                 break;
 655         case CS6:
 656                 cval = 0x01;
 657                 break;
 658         case CS7:
 659                 cval = 0x02;
 660                 break;
 661         case CS8:
 662                 cval = 0x03;
 663                 break;
 664         default:
 665                 cval = 0x00;
 666                 break;          /* too keep GCC shut... */
 667         }
 668         if (cflag & CSTOPB)
 669                 cval |= 0x04;
 670         if (cflag & PARENB)
 671                 cval |= UART_LCR_PARITY;
 672         if (!(cflag & PARODD))
 673                 cval |= UART_LCR_EPAR;
 674         if (cflag & CMSPAR)
 675                 cval |= UART_LCR_SPAR;
 676
 677         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 678                 if (info->board->chip_flag) {
 679                         fcr = UART_FCR_ENABLE_FIFO;
 680                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 681                         mxser_set_must_fifo_value(info);
 682                 } else
 683                         fcr = 0;
 684         } else {
 685                 fcr = UART_FCR_ENABLE_FIFO;
 686                 if (info->board->chip_flag) {
 687                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 688                         mxser_set_must_fifo_value(info);
 689                 } else {
 690                         switch (info->rx_trigger) {
 691                         case 1:
 692                                 fcr |= UART_FCR_TRIGGER_1;
 693                                 break;
 694                         case 4:
 695                                 fcr |= UART_FCR_TRIGGER_4;
 696                                 break;
 697                         case 8:
 698                                 fcr |= UART_FCR_TRIGGER_8;
 699                                 break;
 700                         default:
 701                                 fcr |= UART_FCR_TRIGGER_14;
 702                                 break;
 703                         }
 704                 }
 705         }
 706
 707         /* CTS flow control flag and modem status interrupts */
 708         info->IER &= ~UART_IER_MSI;
 709         info->MCR &= ~UART_MCR_AFE;
 710         if (cflag & CRTSCTS) {
 711                 info->port.flags |= ASYNC_CTS_FLOW;
 712                 info->IER |= UART_IER_MSI;
 713                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 714                         info->MCR |= UART_MCR_AFE;
 715                 } else {
 716                         status = inb(info->ioaddr + UART_MSR);
 717                         if (tty->hw_stopped) {
 718                                 if (status & UART_MSR_CTS) {
 719                                         tty->hw_stopped = 0;
 720                                         if (info->type != PORT_16550A &&
 721                                                         !info->board->chip_flag) {
 722                                                 outb(info->IER & ~UART_IER_THRI,
 723                                                         info->ioaddr +
 724                                                         UART_IER);
 725                                                 info->IER |= UART_IER_THRI;
 726                                                 outb(info->IER, info->ioaddr +
 727                                                                 UART_IER);
 728                                         }
 729                                         tty_wakeup(tty);
 730                                 }
 731                         } else {
 732                                 if (!(status & UART_MSR_CTS)) {
 733                                         tty->hw_stopped = 1;
 734                                         if ((info->type != PORT_16550A) &&
 735                                                         (!info->board->chip_flag)) {
 736                                                 info->IER &= ~UART_IER_THRI;
 737                                                 outb(info->IER, info->ioaddr +
 738                                                                 UART_IER);
 739                                         }
 740                                 }
 741                         }
 742                 }
 743         } else {
 744                 info->port.flags &= ~ASYNC_CTS_FLOW;
 745         }
 746         outb(info->MCR, info->ioaddr + UART_MCR);
 747         if (cflag & CLOCAL) {
 748                 info->port.flags &= ~ASYNC_CHECK_CD;
 749         } else {
 750                 info->port.flags |= ASYNC_CHECK_CD;
 751                 info->IER |= UART_IER_MSI;
 752         }
 753         outb(info->IER, info->ioaddr + UART_IER);
 754
 755         /*
 756          * Set up parity check flag
 757          */
 758         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 759         if (I_INPCK(tty))
 760                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 761         if (I_BRKINT(tty) || I_PARMRK(tty))
 762                 info->read_status_mask |= UART_LSR_BI;
 763
 764         info->ignore_status_mask = 0;
 765
 766         if (I_IGNBRK(tty)) {
 767                 info->ignore_status_mask |= UART_LSR_BI;
 768                 info->read_status_mask |= UART_LSR_BI;
 769                 /*
 770                  * If we're ignore parity and break indicators, ignore
 771                  * overruns too.  (For real raw support).
 772                  */
 773                 if (I_IGNPAR(tty)) {
 774                         info->ignore_status_mask |=
 775                                                 UART_LSR_OE |
 776                                                 UART_LSR_PE |
 777                                                 UART_LSR_FE;
 778                         info->read_status_mask |=
 779                                                 UART_LSR_OE |
 780                                                 UART_LSR_PE |
 781                                                 UART_LSR_FE;
 782                 }
 783         }
 784         if (info->board->chip_flag) {
 785                 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
 786                 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
 787                 if (I_IXON(tty)) {
 788                         mxser_enable_must_rx_software_flow_control(
 789                                         info->ioaddr);
 790                 } else {
 791                         mxser_disable_must_rx_software_flow_control(
 792                                         info->ioaddr);
 793                 }
 794                 if (I_IXOFF(tty)) {
 795                         mxser_enable_must_tx_software_flow_control(
 796                                         info->ioaddr);
 797                 } else {
 798                         mxser_disable_must_tx_software_flow_control(
 799                                         info->ioaddr);
 800                 }
 801         }
 802
 803
 804         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 805         outb(cval, info->ioaddr + UART_LCR);
 806
 807         return ret;
 808 }
 809
 810 static void mxser_check_modem_status(struct tty_struct *tty,
 811                                 struct mxser_port *port, int status)
 812 {
 813         /* update input line counters */
 814         if (status & UART_MSR_TERI)
 815                 port->icount.rng++;
 816         if (status & UART_MSR_DDSR)
 817                 port->icount.dsr++;
 818         if (status & UART_MSR_DDCD)
 819                 port->icount.dcd++;
 820         if (status & UART_MSR_DCTS)
 821                 port->icount.cts++;
 822         port->mon_data.modem_status = status;
 823         wake_up_interruptible(&port->port.delta_msr_wait);
 824
 825         if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 826                 if (status & UART_MSR_DCD)
 827                         wake_up_interruptible(&port->port.open_wait);
 828         }
 829
 830         if (port->port.flags & ASYNC_CTS_FLOW) {
 831                 if (tty->hw_stopped) {
 832                         if (status & UART_MSR_CTS) {
 833                                 tty->hw_stopped = 0;
 834
 835                                 if ((port->type != PORT_16550A) &&
 836                                                 (!port->board->chip_flag)) {
 837                                         outb(port->IER & ~UART_IER_THRI,
 838                                                 port->ioaddr + UART_IER);
 839                                         port->IER |= UART_IER_THRI;
 840                                         outb(port->IER, port->ioaddr +
 841                                                         UART_IER);
 842                                 }
 843                                 tty_wakeup(tty);
 844                         }
 845                 } else {
 846                         if (!(status & UART_MSR_CTS)) {
 847                                 tty->hw_stopped = 1;
 848                                 if (port->type != PORT_16550A &&
 849                                                 !port->board->chip_flag) {
 850                                         port->IER &= ~UART_IER_THRI;
 851                                         outb(port->IER, port->ioaddr +
 852                                                         UART_IER);
 853                                 }
 854                         }
 855                 }
 856         }
 857 }
 858
 859 static int mxser_startup(struct tty_struct *tty)
 860 {
 861         struct mxser_port *info = tty->driver_data;
 862         unsigned long page;
 863         unsigned long flags;
 864
 865         page = __get_free_page(GFP_KERNEL);
 866         if (!page)
 867                 return -ENOMEM;
 868
 869         spin_lock_irqsave(&info->slock, flags);
 870
 871         if (info->port.flags & ASYNC_INITIALIZED) {
 872                 free_page(page);
 873                 spin_unlock_irqrestore(&info->slock, flags);
 874                 return 0;
 875         }
 876
 877         if (!info->ioaddr || !info->type) {
 878                 set_bit(TTY_IO_ERROR, &tty->flags);
 879                 free_page(page);
 880                 spin_unlock_irqrestore(&info->slock, flags);
 881                 return 0;
 882         }
 883         if (info->port.xmit_buf)
 884                 free_page(page);
 885         else
 886                 info->port.xmit_buf = (unsigned char *) page;
 887
 888         /*
 889          * Clear the FIFO buffers and disable them
 890          * (they will be reenabled in mxser_change_speed())
 891          */
 892         if (info->board->chip_flag)
 893                 outb((UART_FCR_CLEAR_RCVR |
 894                         UART_FCR_CLEAR_XMIT |
 895                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 896         else
 897                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 898                         info->ioaddr + UART_FCR);
 899
 900         /*
 901          * At this point there's no way the LSR could still be 0xFF;
 902          * if it is, then bail out, because there's likely no UART
 903          * here.
 904          */
 905         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 906                 spin_unlock_irqrestore(&info->slock, flags);
 907                 if (capable(CAP_SYS_ADMIN)) {
 908                         if (tty)
 909                                 set_bit(TTY_IO_ERROR, &tty->flags);
 910                         return 0;
 911                 } else
 912                         return -ENODEV;
 913         }
 914
 915         /*
 916          * Clear the interrupt registers.
 917          */
 918         (void) inb(info->ioaddr + UART_LSR);
 919         (void) inb(info->ioaddr + UART_RX);
 920         (void) inb(info->ioaddr + UART_IIR);
 921         (void) inb(info->ioaddr + UART_MSR);
 922
 923         /*
 924          * Now, initialize the UART
 925          */
 926         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 927         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 928         outb(info->MCR, info->ioaddr + UART_MCR);
 929
 930         /*
 931          * Finally, enable interrupts
 932          */
 933         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 934
 935         if (info->board->chip_flag)
 936                 info->IER |= MOXA_MUST_IER_EGDAI;
 937         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 938
 939         /*
 940          * And clear the interrupt registers again for luck.
 941          */
 942         (void) inb(info->ioaddr + UART_LSR);
 943         (void) inb(info->ioaddr + UART_RX);
 944         (void) inb(info->ioaddr + UART_IIR);
 945         (void) inb(info->ioaddr + UART_MSR);
 946
 947         clear_bit(TTY_IO_ERROR, &tty->flags);
 948         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 949
 950         /*
 951          * and set the speed of the serial port
 952          */
 953         mxser_change_speed(tty, NULL);
 954         info->port.flags |= ASYNC_INITIALIZED;
 955         spin_unlock_irqrestore(&info->slock, flags);
 956
 957         return 0;
 958 }
 959
 960 /*
 961  * This routine will shutdown a serial port; interrupts maybe disabled, and
 962  * DTR is dropped if the hangup on close termio flag is on.
 963  */
 964 static void mxser_shutdown(struct tty_struct *tty)
 965 {
 966         struct mxser_port *info = tty->driver_data;
 967         unsigned long flags;
 968
 969         if (!(info->port.flags & ASYNC_INITIALIZED))
 970                 return;
 971
 972         spin_lock_irqsave(&info->slock, flags);
 973
 974         /*
 975          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 976          * here so the queue might never be waken up
 977          */
 978         wake_up_interruptible(&info->port.delta_msr_wait);
 979
 980         /*
 981          * Free the IRQ, if necessary
 982          */
 983         if (info->port.xmit_buf) {
 984                 free_page((unsigned long) info->port.xmit_buf);
 985                 info->port.xmit_buf = NULL;
 986         }
 987
 988         info->IER = 0;
 989         outb(0x00, info->ioaddr + UART_IER);
 990
 991         if (tty->termios->c_cflag & HUPCL)
 992                 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 993         outb(info->MCR, info->ioaddr + UART_MCR);
 994
 995         /* clear Rx/Tx FIFO's */
 996         if (info->board->chip_flag)
 997                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 998                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 999                                 info->ioaddr + UART_FCR);
1000         else
1001                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1002                         info->ioaddr + UART_FCR);
1003
1004         /* read data port to reset things */
1005         (void) inb(info->ioaddr + UART_RX);
1006
1007         set_bit(TTY_IO_ERROR, &tty->flags);
1008
1009         info->port.flags &= ~ASYNC_INITIALIZED;
1010
1011         if (info->board->chip_flag)
1012                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1013
1014         spin_unlock_irqrestore(&info->slock, flags);
1015 }
1016
1017 /*
1018  * This routine is called whenever a serial port is opened.  It
1019  * enables interrupts for a serial port, linking in its async structure into
1020  * the IRQ chain.   It also performs the serial-specific
1021  * initialization for the tty structure.
1022  */
1023 static int mxser_open(struct tty_struct *tty, struct file *filp)
1024 {
1025         struct mxser_port *info;
1026         unsigned long flags;
1027         int retval, line;
1028
1029         line = tty->index;
1030         if (line == MXSER_PORTS)
1031                 return 0;
1032         if (line < 0 || line > MXSER_PORTS)
1033                 return -ENODEV;
1034         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1035         if (!info->ioaddr)
1036                 return -ENODEV;
1037
1038         tty->driver_data = info;
1039         tty_port_tty_set(&info->port, tty);
1040         /*
1041          * Start up serial port
1042          */
1043         spin_lock_irqsave(&info->port.lock, flags);
1044         info->port.count++;
1045         spin_unlock_irqrestore(&info->port.lock, flags);
1046         retval = mxser_startup(tty);
1047         if (retval)
1048                 return retval;
1049
1050         retval = tty_port_block_til_ready(&info->port, tty, filp);
1051         if (retval)
1052                 return retval;
1053
1054         return 0;
1055 }
1056
1057 static void mxser_flush_buffer(struct tty_struct *tty)
1058 {
1059         struct mxser_port *info = tty->driver_data;
1060         char fcr;
1061         unsigned long flags;
1062
1063
1064         spin_lock_irqsave(&info->slock, flags);
1065         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1066
1067         fcr = inb(info->ioaddr + UART_FCR);
1068         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1069                 info->ioaddr + UART_FCR);
1070         outb(fcr, info->ioaddr + UART_FCR);
1071
1072         spin_unlock_irqrestore(&info->slock, flags);
1073
1074         tty_wakeup(tty);
1075 }
1076
1077
1078 static void mxser_close_port(struct tty_struct *tty, struct tty_port *port)
1079 {
1080         struct mxser_port *info = container_of(port, struct mxser_port, port);
1081         unsigned long timeout;
1082         /*
1083          * Save the termios structure, since this port may have
1084          * separate termios for callout and dialin.
1085          *
1086          * FIXME: Can this go ?
1087          */
1088         if (port->flags & ASYNC_NORMAL_ACTIVE)
1089                 info->normal_termios = *tty->termios;
1090         /*
1091          * At this point we stop accepting input.  To do this, we
1092          * disable the receive line status interrupts, and tell the
1093          * interrupt driver to stop checking the data ready bit in the
1094          * line status register.
1095          */
1096         info->IER &= ~UART_IER_RLSI;
1097         if (info->board->chip_flag)
1098                 info->IER &= ~MOXA_MUST_RECV_ISR;
1099
1100         if (port->flags & ASYNC_INITIALIZED) {
1101                 outb(info->IER, info->ioaddr + UART_IER);
1102                 /*
1103                  * Before we drop DTR, make sure the UART transmitter
1104                  * has completely drained; this is especially
1105                  * important if there is a transmit FIFO!
1106                  */
1107                 timeout = jiffies + HZ;
1108                 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1109                         schedule_timeout_interruptible(5);
1110                         if (time_after(jiffies, timeout))
1111                                 break;
1112                 }
1113         }
1114         mxser_shutdown(tty);
1115
1116 }
1117
1118 /*
1119  * This routine is called when the serial port gets closed.  First, we
1120  * wait for the last remaining data to be sent.  Then, we unlink its
1121  * async structure from the interrupt chain if necessary, and we free
1122  * that IRQ if nothing is left in the chain.
1123  */
1124 static void mxser_close(struct tty_struct *tty, struct file *filp)
1125 {
1126         struct mxser_port *info = tty->driver_data;
1127         struct tty_port *port = &info->port;
1128
1129         if (tty->index == MXSER_PORTS)
1130                 return;
1131         if (tty_port_close_start(port, tty, filp) == 0)
1132                 return;
1133         mxser_close_port(tty, port);
1134         mxser_flush_buffer(tty);
1135         /* Right now the tty_port set is done outside of the close_end helper
1136            as we don't yet have everyone using refcounts */
1137         tty_port_close_end(port, tty);
1138         tty_port_tty_set(port, NULL);
1139 }
1140
1141 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1142 {
1143         int c, total = 0;
1144         struct mxser_port *info = tty->driver_data;
1145         unsigned long flags;
1146
1147         if (!info->port.xmit_buf)
1148                 return 0;
1149
1150         while (1) {
1151                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1152                                           SERIAL_XMIT_SIZE - info->xmit_head));
1153                 if (c <= 0)
1154                         break;
1155
1156                 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1157                 spin_lock_irqsave(&info->slock, flags);
1158                 info->xmit_head = (info->xmit_head + c) &
1159                                   (SERIAL_XMIT_SIZE - 1);
1160                 info->xmit_cnt += c;
1161                 spin_unlock_irqrestore(&info->slock, flags);
1162
1163                 buf += c;
1164                 count -= c;
1165                 total += c;
1166         }
1167
1168         if (info->xmit_cnt && !tty->stopped) {
1169                 if (!tty->hw_stopped ||
1170                                 (info->type == PORT_16550A) ||
1171                                 (info->board->chip_flag)) {
1172                         spin_lock_irqsave(&info->slock, flags);
1173                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1174                                         UART_IER);
1175                         info->IER |= UART_IER_THRI;
1176                         outb(info->IER, info->ioaddr + UART_IER);
1177                         spin_unlock_irqrestore(&info->slock, flags);
1178                 }
1179         }
1180         return total;
1181 }
1182
1183 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1184 {
1185         struct mxser_port *info = tty->driver_data;
1186         unsigned long flags;
1187
1188         if (!info->port.xmit_buf)
1189                 return 0;
1190
1191         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1192                 return 0;
1193
1194         spin_lock_irqsave(&info->slock, flags);
1195         info->port.xmit_buf[info->xmit_head++] = ch;
1196         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1197         info->xmit_cnt++;
1198         spin_unlock_irqrestore(&info->slock, flags);
1199         if (!tty->stopped) {
1200                 if (!tty->hw_stopped ||
1201                                 (info->type == PORT_16550A) ||
1202                                 info->board->chip_flag) {
1203                         spin_lock_irqsave(&info->slock, flags);
1204                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1205                         info->IER |= UART_IER_THRI;
1206                         outb(info->IER, info->ioaddr + UART_IER);
1207                         spin_unlock_irqrestore(&info->slock, flags);
1208                 }
1209         }
1210         return 1;
1211 }
1212
1213
1214 static void mxser_flush_chars(struct tty_struct *tty)
1215 {
1216         struct mxser_port *info = tty->driver_data;
1217         unsigned long flags;
1218
1219         if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1220                         (tty->hw_stopped && info->type != PORT_16550A &&
1221                          !info->board->chip_flag))
1222                 return;
1223
1224         spin_lock_irqsave(&info->slock, flags);
1225
1226         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1227         info->IER |= UART_IER_THRI;
1228         outb(info->IER, info->ioaddr + UART_IER);
1229
1230         spin_unlock_irqrestore(&info->slock, flags);
1231 }
1232
1233 static int mxser_write_room(struct tty_struct *tty)
1234 {
1235         struct mxser_port *info = tty->driver_data;
1236         int ret;
1237
1238         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1239         return ret < 0 ? 0 : ret;
1240 }
1241
1242 static int mxser_chars_in_buffer(struct tty_struct *tty)
1243 {
1244         struct mxser_port *info = tty->driver_data;
1245         return info->xmit_cnt;
1246 }
1247
1248 /*
1249  * ------------------------------------------------------------
1250  * friends of mxser_ioctl()
1251  * ------------------------------------------------------------
1252  */
1253 static int mxser_get_serial_info(struct tty_struct *tty,
1254                 struct serial_struct __user *retinfo)
1255 {
1256         struct mxser_port *info = tty->driver_data;
1257         struct serial_struct tmp = {
1258                 .type = info->type,
1259                 .line = tty->index,
1260                 .port = info->ioaddr,
1261                 .irq = info->board->irq,
1262                 .flags = info->port.flags,
1263                 .baud_base = info->baud_base,
1264                 .close_delay = info->port.close_delay,
1265                 .closing_wait = info->port.closing_wait,
1266                 .custom_divisor = info->custom_divisor,
1267                 .hub6 = 0
1268         };
1269         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1270                 return -EFAULT;
1271         return 0;
1272 }
1273
1274 static int mxser_set_serial_info(struct tty_struct *tty,
1275                 struct serial_struct __user *new_info)
1276 {
1277         struct mxser_port *info = tty->driver_data;
1278         struct serial_struct new_serial;
1279         speed_t baud;
1280         unsigned long sl_flags;
1281         unsigned int flags;
1282         int retval = 0;
1283
1284         if (!new_info || !info->ioaddr)
1285                 return -ENODEV;
1286         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1287                 return -EFAULT;
1288
1289         if (new_serial.irq != info->board->irq ||
1290                         new_serial.port != info->ioaddr)
1291                 return -EINVAL;
1292
1293         flags = info->port.flags & ASYNC_SPD_MASK;
1294
1295         if (!capable(CAP_SYS_ADMIN)) {
1296                 if ((new_serial.baud_base != info->baud_base) ||
1297                                 (new_serial.close_delay != info->port.close_delay) ||
1298                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1299                         return -EPERM;
1300                 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1301                                 (new_serial.flags & ASYNC_USR_MASK));
1302         } else {
1303                 /*
1304                  * OK, past this point, all the error checking has been done.
1305                  * At this point, we start making changes.....
1306                  */
1307                 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1308                                 (new_serial.flags & ASYNC_FLAGS));
1309                 info->port.close_delay = new_serial.close_delay * HZ / 100;
1310                 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1311                 tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)
1312                                                                 ? 1 : 0;
1313                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1314                                 (new_serial.baud_base != info->baud_base ||
1315                                 new_serial.custom_divisor !=
1316                                 info->custom_divisor)) {
1317                         baud = new_serial.baud_base / new_serial.custom_divisor;
1318                         tty_encode_baud_rate(tty, baud, baud);
1319                 }
1320         }
1321
1322         info->type = new_serial.type;
1323
1324         process_txrx_fifo(info);
1325
1326         if (info->port.flags & ASYNC_INITIALIZED) {
1327                 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1328                         spin_lock_irqsave(&info->slock, sl_flags);
1329                         mxser_change_speed(tty, NULL);
1330                         spin_unlock_irqrestore(&info->slock, sl_flags);
1331                 }
1332         } else
1333                 retval = mxser_startup(tty);
1334
1335         return retval;
1336 }
1337
1338 /*
1339  * mxser_get_lsr_info - get line status register info
1340  *
1341  * Purpose: Let user call ioctl() to get info when the UART physically
1342  *          is emptied.  On bus types like RS485, the transmitter must
1343  *          release the bus after transmitting. This must be done when
1344  *          the transmit shift register is empty, not be done when the
1345  *          transmit holding register is empty.  This functionality
1346  *          allows an RS485 driver to be written in user space.
1347  */
1348 static int mxser_get_lsr_info(struct mxser_port *info,
1349                 unsigned int __user *value)
1350 {
1351         unsigned char status;
1352         unsigned int result;
1353         unsigned long flags;
1354
1355         spin_lock_irqsave(&info->slock, flags);
1356         status = inb(info->ioaddr + UART_LSR);
1357         spin_unlock_irqrestore(&info->slock, flags);
1358         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1359         return put_user(result, value);
1360 }
1361
1362 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1363 {
1364         struct mxser_port *info = tty->driver_data;
1365         unsigned char control, status;
1366         unsigned long flags;
1367
1368
1369         if (tty->index == MXSER_PORTS)
1370                 return -ENOIOCTLCMD;
1371         if (test_bit(TTY_IO_ERROR, &tty->flags))
1372                 return -EIO;
1373
1374         control = info->MCR;
1375
1376         spin_lock_irqsave(&info->slock, flags);
1377         status = inb(info->ioaddr + UART_MSR);
1378         if (status & UART_MSR_ANY_DELTA)
1379                 mxser_check_modem_status(tty, info, status);
1380         spin_unlock_irqrestore(&info->slock, flags);
1381         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1382                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1383                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1384                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1385                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1386                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1387 }
1388
1389 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1390                 unsigned int set, unsigned int clear)
1391 {
1392         struct mxser_port *info = tty->driver_data;
1393         unsigned long flags;
1394
1395
1396         if (tty->index == MXSER_PORTS)
1397                 return -ENOIOCTLCMD;
1398         if (test_bit(TTY_IO_ERROR, &tty->flags))
1399                 return -EIO;
1400
1401         spin_lock_irqsave(&info->slock, flags);
1402
1403         if (set & TIOCM_RTS)
1404                 info->MCR |= UART_MCR_RTS;
1405         if (set & TIOCM_DTR)
1406                 info->MCR |= UART_MCR_DTR;
1407
1408         if (clear & TIOCM_RTS)
1409                 info->MCR &= ~UART_MCR_RTS;
1410         if (clear & TIOCM_DTR)
1411                 info->MCR &= ~UART_MCR_DTR;
1412
1413         outb(info->MCR, info->ioaddr + UART_MCR);
1414         spin_unlock_irqrestore(&info->slock, flags);
1415         return 0;
1416 }
1417
1418 static int __init mxser_program_mode(int port)
1419 {
1420         int id, i, j, n;
1421
1422         outb(0, port);
1423         outb(0, port);
1424         outb(0, port);
1425         (void)inb(port);
1426         (void)inb(port);
1427         outb(0, port);
1428         (void)inb(port);
1429
1430         id = inb(port + 1) & 0x1F;
1431         if ((id != C168_ASIC_ID) &&
1432                         (id != C104_ASIC_ID) &&
1433                         (id != C102_ASIC_ID) &&
1434                         (id != CI132_ASIC_ID) &&
1435                         (id != CI134_ASIC_ID) &&
1436                         (id != CI104J_ASIC_ID))
1437                 return -1;
1438         for (i = 0, j = 0; i < 4; i++) {
1439                 n = inb(port + 2);
1440                 if (n == 'M') {
1441                         j = 1;
1442                 } else if ((j == 1) && (n == 1)) {
1443                         j = 2;
1444                         break;
1445                 } else
1446                         j = 0;
1447         }
1448         if (j != 2)
1449                 id = -2;
1450         return id;
1451 }
1452
1453 static void __init mxser_normal_mode(int port)
1454 {
1455         int i, n;
1456
1457         outb(0xA5, port + 1);
1458         outb(0x80, port + 3);
1459         outb(12, port + 0);     /* 9600 bps */
1460         outb(0, port + 1);
1461         outb(0x03, port + 3);   /* 8 data bits */
1462         outb(0x13, port + 4);   /* loop back mode */
1463         for (i = 0; i < 16; i++) {
1464                 n = inb(port + 5);
1465                 if ((n & 0x61) == 0x60)
1466                         break;
1467                 if ((n & 1) == 1)
1468                         (void)inb(port);
1469         }
1470         outb(0x00, port + 4);
1471 }
1472
1473 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1474 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1475 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1476 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1477 #define EN_CCMD         0x000   /* Chip's command register     */
1478 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1479 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1480 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1481 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1482 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1483 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1484 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1485 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1486 static int __init mxser_read_register(int port, unsigned short *regs)
1487 {
1488         int i, k, value, id;
1489         unsigned int j;
1490
1491         id = mxser_program_mode(port);
1492         if (id < 0)
1493                 return id;
1494         for (i = 0; i < 14; i++) {
1495                 k = (i & 0x3F) | 0x180;
1496                 for (j = 0x100; j > 0; j >>= 1) {
1497                         outb(CHIP_CS, port);
1498                         if (k & j) {
1499                                 outb(CHIP_CS | CHIP_DO, port);
1500                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1501                         } else {
1502                                 outb(CHIP_CS, port);
1503                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1504                         }
1505                 }
1506                 (void)inb(port);
1507                 value = 0;
1508                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1509                         outb(CHIP_CS, port);
1510                         outb(CHIP_CS | CHIP_SK, port);
1511                         if (inb(port) & CHIP_DI)
1512                                 value |= j;
1513                 }
1514                 regs[i] = value;
1515                 outb(0, port);
1516         }
1517         mxser_normal_mode(port);
1518         return id;
1519 }
1520
1521 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1522 {
1523         struct mxser_port *port;
1524         struct tty_struct *tty;
1525         int result, status;
1526         unsigned int i, j;
1527         int ret = 0;
1528
1529         switch (cmd) {
1530         case MOXA_GET_MAJOR:
1531                 if (printk_ratelimit())
1532                         printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1533                                         "%x (GET_MAJOR), fix your userspace\n",
1534                                         current->comm, cmd);
1535                 return put_user(ttymajor, (int __user *)argp);
1536
1537         case MOXA_CHKPORTENABLE:
1538                 result = 0;
1539                 lock_kernel();
1540                 for (i = 0; i < MXSER_BOARDS; i++)
1541                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1542                                 if (mxser_boards[i].ports[j].ioaddr)
1543                                         result |= (1 << i);
1544                 unlock_kernel();
1545                 return put_user(result, (unsigned long __user *)argp);
1546         case MOXA_GETDATACOUNT:
1547                 lock_kernel();
1548                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1549                         ret = -EFAULT;
1550                 unlock_kernel();
1551                 return ret;
1552         case MOXA_GETMSTATUS: {
1553                 struct mxser_mstatus ms, __user *msu = argp;
1554                 lock_kernel();
1555                 for (i = 0; i < MXSER_BOARDS; i++)
1556                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1557                                 port = &mxser_boards[i].ports[j];
1558                                 memset(&ms, 0, sizeof(ms));
1559
1560                                 if (!port->ioaddr)
1561                                         goto copy;
1562
1563                                 tty = tty_port_tty_get(&port->port);
1564
1565                                 if (!tty || !tty->termios)
1566                                         ms.cflag = port->normal_termios.c_cflag;
1567                                 else
1568                                         ms.cflag = tty->termios->c_cflag;
1569                                 tty_kref_put(tty);
1570                                 status = inb(port->ioaddr + UART_MSR);
1571                                 if (status & UART_MSR_DCD)
1572                                         ms.dcd = 1;
1573                                 if (status & UART_MSR_DSR)
1574                                         ms.dsr = 1;
1575                                 if (status & UART_MSR_CTS)
1576                                         ms.cts = 1;
1577                         copy:
1578                                 if (copy_to_user(msu, &ms, sizeof(ms))) {
1579                                         unlock_kernel();
1580                                         return -EFAULT;
1581                                 }
1582                                 msu++;
1583                         }
1584                 unlock_kernel();
1585                 return 0;
1586         }
1587         case MOXA_ASPP_MON_EXT: {
1588                 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1589                 unsigned int cflag, iflag, p;
1590                 u8 opmode;
1591
1592                 me = kzalloc(sizeof(*me), GFP_KERNEL);
1593                 if (!me)
1594                         return -ENOMEM;
1595
1596                 lock_kernel();
1597                 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1598                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1599                                 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1600                                         i = MXSER_BOARDS;
1601                                         break;
1602                                 }
1603                                 port = &mxser_boards[i].ports[j];
1604                                 if (!port->ioaddr)
1605                                         continue;
1606
1607                                 status = mxser_get_msr(port->ioaddr, 0, p);
1608
1609                                 if (status & UART_MSR_TERI)
1610                                         port->icount.rng++;
1611                                 if (status & UART_MSR_DDSR)
1612                                         port->icount.dsr++;
1613                                 if (status & UART_MSR_DDCD)
1614                                         port->icount.dcd++;
1615                                 if (status & UART_MSR_DCTS)
1616                                         port->icount.cts++;
1617
1618                                 port->mon_data.modem_status = status;
1619                                 me->rx_cnt[p] = port->mon_data.rxcnt;
1620                                 me->tx_cnt[p] = port->mon_data.txcnt;
1621                                 me->up_rxcnt[p] = port->mon_data.up_rxcnt;
1622                                 me->up_txcnt[p] = port->mon_data.up_txcnt;
1623                                 me->modem_status[p] =
1624                                         port->mon_data.modem_status;
1625                                 tty = tty_port_tty_get(&port->port);
1626
1627                                 if (!tty || !tty->termios) {
1628                                         cflag = port->normal_termios.c_cflag;
1629                                         iflag = port->normal_termios.c_iflag;
1630                                         me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);
1631                                 } else {
1632                                         cflag = tty->termios->c_cflag;
1633                                         iflag = tty->termios->c_iflag;
1634                                         me->baudrate[p] = tty_get_baud_rate(tty);
1635                                 }
1636                                 tty_kref_put(tty);
1637
1638                                 me->databits[p] = cflag & CSIZE;
1639                                 me->stopbits[p] = cflag & CSTOPB;
1640                                 me->parity[p] = cflag & (PARENB | PARODD |
1641                                                 CMSPAR);
1642
1643                                 if (cflag & CRTSCTS)
1644                                         me->flowctrl[p] |= 0x03;
1645
1646                                 if (iflag & (IXON | IXOFF))
1647                                         me->flowctrl[p] |= 0x0C;
1648
1649                                 if (port->type == PORT_16550A)
1650                                         me->fifo[p] = 1;
1651
1652                                 opmode = inb(port->opmode_ioaddr) >>
1653                                                 ((p % 4) * 2);
1654                                 opmode &= OP_MODE_MASK;
1655                                 me->iftype[p] = opmode;
1656                         }
1657                 }
1658                 unlock_kernel();
1659                 if (copy_to_user(argp, me, sizeof(*me)))
1660                         ret = -EFAULT;
1661                 kfree(me);
1662                 return ret;
1663         }
1664         default:
1665                 return -ENOIOCTLCMD;
1666         }
1667         return 0;
1668 }
1669
1670 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1671                 struct async_icount *cprev)
1672 {
1673         struct async_icount cnow;
1674         unsigned long flags;
1675         int ret;
1676
1677         spin_lock_irqsave(&info->slock, flags);
1678         cnow = info->icount;    /* atomic copy */
1679         spin_unlock_irqrestore(&info->slock, flags);
1680
1681         ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1682                 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1683                 ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1684                 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1685
1686         *cprev = cnow;
1687
1688         return ret;
1689 }
1690
1691 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1692                 unsigned int cmd, unsigned long arg)
1693 {
1694         struct mxser_port *info = tty->driver_data;
1695         struct async_icount cnow;
1696         unsigned long flags;
1697         void __user *argp = (void __user *)arg;
1698         int retval;
1699
1700         if (tty->index == MXSER_PORTS)
1701                 return mxser_ioctl_special(cmd, argp);
1702
1703         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1704                 int p;
1705                 unsigned long opmode;
1706                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1707                 int shiftbit;
1708                 unsigned char val, mask;
1709
1710                 p = tty->index % 4;
1711                 if (cmd == MOXA_SET_OP_MODE) {
1712                         if (get_user(opmode, (int __user *) argp))
1713                                 return -EFAULT;
1714                         if (opmode != RS232_MODE &&
1715                                         opmode != RS485_2WIRE_MODE &&
1716                                         opmode != RS422_MODE &&
1717                                         opmode != RS485_4WIRE_MODE)
1718                                 return -EFAULT;
1719                         lock_kernel();
1720                         mask = ModeMask[p];
1721                         shiftbit = p * 2;
1722                         val = inb(info->opmode_ioaddr);
1723                         val &= mask;
1724                         val |= (opmode << shiftbit);
1725                         outb(val, info->opmode_ioaddr);
1726                         unlock_kernel();
1727                 } else {
1728                         lock_kernel();
1729                         shiftbit = p * 2;
1730                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1731                         opmode &= OP_MODE_MASK;
1732                         unlock_kernel();
1733                         if (put_user(opmode, (int __user *)argp))
1734                                 return -EFAULT;
1735                 }
1736                 return 0;
1737         }
1738
1739         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1740                         test_bit(TTY_IO_ERROR, &tty->flags))
1741                 return -EIO;
1742
1743         switch (cmd) {
1744         case TIOCGSERIAL:
1745                 lock_kernel();
1746                 retval = mxser_get_serial_info(tty, argp);
1747                 unlock_kernel();
1748                 return retval;
1749         case TIOCSSERIAL:
1750                 lock_kernel();
1751                 retval = mxser_set_serial_info(tty, argp);
1752                 unlock_kernel();
1753                 return retval;
1754         case TIOCSERGETLSR:     /* Get line status register */
1755                 return  mxser_get_lsr_info(info, argp);
1756                 /*
1757                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1758                  * - mask passed in arg for lines of interest
1759                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1760                  * Caller should use TIOCGICOUNT to see which one it was
1761                  */
1762         case TIOCMIWAIT:
1763                 spin_lock_irqsave(&info->slock, flags);
1764                 cnow = info->icount;    /* note the counters on entry */
1765                 spin_unlock_irqrestore(&info->slock, flags);
1766
1767                 return wait_event_interruptible(info->port.delta_msr_wait,
1768                                 mxser_cflags_changed(info, arg, &cnow));
1769         /*
1770          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1771          * Return: write counters to the user passed counter struct
1772          * NB: both 1->0 and 0->1 transitions are counted except for
1773          *     RI where only 0->1 is counted.
1774          */
1775         case TIOCGICOUNT: {
1776                 struct serial_icounter_struct icnt = { 0 };
1777                 spin_lock_irqsave(&info->slock, flags);
1778                 cnow = info->icount;
1779                 spin_unlock_irqrestore(&info->slock, flags);
1780
1781                 icnt.frame = cnow.frame;
1782                 icnt.brk = cnow.brk;
1783                 icnt.overrun = cnow.overrun;
1784                 icnt.buf_overrun = cnow.buf_overrun;
1785                 icnt.parity = cnow.parity;
1786                 icnt.rx = cnow.rx;
1787                 icnt.tx = cnow.tx;
1788                 icnt.cts = cnow.cts;
1789                 icnt.dsr = cnow.dsr;
1790                 icnt.rng = cnow.rng;
1791                 icnt.dcd = cnow.dcd;
1792
1793                 return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
1794         }
1795         case MOXA_HighSpeedOn:
1796                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1797         case MOXA_SDS_RSTICOUNTER:
1798                 lock_kernel();
1799                 info->mon_data.rxcnt = 0;
1800                 info->mon_data.txcnt = 0;
1801                 unlock_kernel();
1802                 return 0;
1803
1804         case MOXA_ASPP_OQUEUE:{
1805                 int len, lsr;
1806
1807                 lock_kernel();
1808                 len = mxser_chars_in_buffer(tty);
1809                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1810                 len += (lsr ? 0 : 1);
1811                 unlock_kernel();
1812
1813                 return put_user(len, (int __user *)argp);
1814         }
1815         case MOXA_ASPP_MON: {
1816                 int mcr, status;
1817
1818                 lock_kernel();
1819                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1820                 mxser_check_modem_status(tty, info, status);
1821
1822                 mcr = inb(info->ioaddr + UART_MCR);
1823                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1824                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1825                 else
1826                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1827
1828                 if (mcr & MOXA_MUST_MCR_TX_XON)
1829                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1830                 else
1831                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1832
1833                 if (tty->hw_stopped)
1834                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1835                 else
1836                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1837                 unlock_kernel();
1838                 if (copy_to_user(argp, &info->mon_data,
1839                                 sizeof(struct mxser_mon)))
1840                         return -EFAULT;
1841
1842                 return 0;
1843         }
1844         case MOXA_ASPP_LSTATUS: {
1845                 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1846                         return -EFAULT;
1847
1848                 info->err_shadow = 0;
1849                 return 0;
1850         }
1851         case MOXA_SET_BAUD_METHOD: {
1852                 int method;
1853
1854                 if (get_user(method, (int __user *)argp))
1855                         return -EFAULT;
1856                 mxser_set_baud_method[tty->index] = method;
1857                 return put_user(method, (int __user *)argp);
1858         }
1859         default:
1860                 return -ENOIOCTLCMD;
1861         }
1862         return 0;
1863 }
1864
1865 static void mxser_stoprx(struct tty_struct *tty)
1866 {
1867         struct mxser_port *info = tty->driver_data;
1868
1869         info->ldisc_stop_rx = 1;
1870         if (I_IXOFF(tty)) {
1871                 if (info->board->chip_flag) {
1872                         info->IER &= ~MOXA_MUST_RECV_ISR;
1873                         outb(info->IER, info->ioaddr + UART_IER);
1874                 } else {
1875                         info->x_char = STOP_CHAR(tty);
1876                         outb(0, info->ioaddr + UART_IER);
1877                         info->IER |= UART_IER_THRI;
1878                         outb(info->IER, info->ioaddr + UART_IER);
1879                 }
1880         }
1881
1882         if (tty->termios->c_cflag & CRTSCTS) {
1883                 info->MCR &= ~UART_MCR_RTS;
1884                 outb(info->MCR, info->ioaddr + UART_MCR);
1885         }
1886 }
1887
1888 /*
1889  * This routine is called by the upper-layer tty layer to signal that
1890  * incoming characters should be throttled.
1891  */
1892 static void mxser_throttle(struct tty_struct *tty)
1893 {
1894         mxser_stoprx(tty);
1895 }
1896
1897 static void mxser_unthrottle(struct tty_struct *tty)
1898 {
1899         struct mxser_port *info = tty->driver_data;
1900
1901         /* startrx */
1902         info->ldisc_stop_rx = 0;
1903         if (I_IXOFF(tty)) {
1904                 if (info->x_char)
1905                         info->x_char = 0;
1906                 else {
1907                         if (info->board->chip_flag) {
1908                                 info->IER |= MOXA_MUST_RECV_ISR;
1909                                 outb(info->IER, info->ioaddr + UART_IER);
1910                         } else {
1911                                 info->x_char = START_CHAR(tty);
1912                                 outb(0, info->ioaddr + UART_IER);
1913                                 info->IER |= UART_IER_THRI;
1914                                 outb(info->IER, info->ioaddr + UART_IER);
1915                         }
1916                 }
1917         }
1918
1919         if (tty->termios->c_cflag & CRTSCTS) {
1920                 info->MCR |= UART_MCR_RTS;
1921                 outb(info->MCR, info->ioaddr + UART_MCR);
1922         }
1923 }
1924
1925 /*
1926  * mxser_stop() and mxser_start()
1927  *
1928  * This routines are called before setting or resetting tty->stopped.
1929  * They enable or disable transmitter interrupts, as necessary.
1930  */
1931 static void mxser_stop(struct tty_struct *tty)
1932 {
1933         struct mxser_port *info = tty->driver_data;
1934         unsigned long flags;
1935
1936         spin_lock_irqsave(&info->slock, flags);
1937         if (info->IER & UART_IER_THRI) {
1938                 info->IER &= ~UART_IER_THRI;
1939                 outb(info->IER, info->ioaddr + UART_IER);
1940         }
1941         spin_unlock_irqrestore(&info->slock, flags);
1942 }
1943
1944 static void mxser_start(struct tty_struct *tty)
1945 {
1946         struct mxser_port *info = tty->driver_data;
1947         unsigned long flags;
1948
1949         spin_lock_irqsave(&info->slock, flags);
1950         if (info->xmit_cnt && info->port.xmit_buf) {
1951                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1952                 info->IER |= UART_IER_THRI;
1953                 outb(info->IER, info->ioaddr + UART_IER);
1954         }
1955         spin_unlock_irqrestore(&info->slock, flags);
1956 }
1957
1958 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1959 {
1960         struct mxser_port *info = tty->driver_data;
1961         unsigned long flags;
1962
1963         spin_lock_irqsave(&info->slock, flags);
1964         mxser_change_speed(tty, old_termios);
1965         spin_unlock_irqrestore(&info->slock, flags);
1966
1967         if ((old_termios->c_cflag & CRTSCTS) &&
1968                         !(tty->termios->c_cflag & CRTSCTS)) {
1969                 tty->hw_stopped = 0;
1970                 mxser_start(tty);
1971         }
1972
1973         /* Handle sw stopped */
1974         if ((old_termios->c_iflag & IXON) &&
1975                         !(tty->termios->c_iflag & IXON)) {
1976                 tty->stopped = 0;
1977
1978                 if (info->board->chip_flag) {
1979                         spin_lock_irqsave(&info->slock, flags);
1980                         mxser_disable_must_rx_software_flow_control(
1981                                         info->ioaddr);
1982                         spin_unlock_irqrestore(&info->slock, flags);
1983                 }
1984
1985                 mxser_start(tty);
1986         }
1987 }
1988
1989 /*
1990  * mxser_wait_until_sent() --- wait until the transmitter is empty
1991  */
1992 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1993 {
1994         struct mxser_port *info = tty->driver_data;
1995         unsigned long orig_jiffies, char_time;
1996         int lsr;
1997
1998         if (info->type == PORT_UNKNOWN)
1999                 return;
2000
2001         if (info->xmit_fifo_size == 0)
2002                 return;         /* Just in case.... */
2003
2004         orig_jiffies = jiffies;
2005         /*
2006          * Set the check interval to be 1/5 of the estimated time to
2007          * send a single character, and make it at least 1.  The check
2008          * interval should also be less than the timeout.
2009          *
2010          * Note: we have to use pretty tight timings here to satisfy
2011          * the NIST-PCTS.
2012          */
2013         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2014         char_time = char_time / 5;
2015         if (char_time == 0)
2016                 char_time = 1;
2017         if (timeout && timeout < char_time)
2018                 char_time = timeout;
2019         /*
2020          * If the transmitter hasn't cleared in twice the approximate
2021          * amount of time to send the entire FIFO, it probably won't
2022          * ever clear.  This assumes the UART isn't doing flow
2023          * control, which is currently the case.  Hence, if it ever
2024          * takes longer than info->timeout, this is probably due to a
2025          * UART bug of some kind.  So, we clamp the timeout parameter at
2026          * 2*info->timeout.
2027          */
2028         if (!timeout || timeout > 2 * info->timeout)
2029                 timeout = 2 * info->timeout;
2030 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2031         printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2032                 timeout, char_time);
2033         printk("jiff=%lu...", jiffies);
2034 #endif
2035         lock_kernel();
2036         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2037 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2038                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2039 #endif
2040                 schedule_timeout_interruptible(char_time);
2041                 if (signal_pending(current))
2042                         break;
2043                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2044                         break;
2045         }
2046         set_current_state(TASK_RUNNING);
2047         unlock_kernel();
2048
2049 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2050         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2051 #endif
2052 }
2053
2054 /*
2055  * This routine is called by tty_hangup() when a hangup is signaled.
2056  */
2057 static void mxser_hangup(struct tty_struct *tty)
2058 {
2059         struct mxser_port *info = tty->driver_data;
2060
2061         mxser_flush_buffer(tty);
2062         mxser_shutdown(tty);
2063         tty_port_hangup(&info->port);
2064 }
2065
2066 /*
2067  * mxser_rs_break() --- routine which turns the break handling on or off
2068  */
2069 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2070 {
2071         struct mxser_port *info = tty->driver_data;
2072         unsigned long flags;
2073
2074         spin_lock_irqsave(&info->slock, flags);
2075         if (break_state == -1)
2076                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2077                         info->ioaddr + UART_LCR);
2078         else
2079                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2080                         info->ioaddr + UART_LCR);
2081         spin_unlock_irqrestore(&info->slock, flags);
2082         return 0;
2083 }
2084
2085 static void mxser_receive_chars(struct tty_struct *tty,
2086                                 struct mxser_port *port, int *status)
2087 {
2088         unsigned char ch, gdl;
2089         int ignored = 0;
2090         int cnt = 0;
2091         int recv_room;
2092         int max = 256;
2093
2094         recv_room = tty->receive_room;
2095         if (recv_room == 0 && !port->ldisc_stop_rx)
2096                 mxser_stoprx(tty);
2097         if (port->board->chip_flag != MOXA_OTHER_UART) {
2098
2099                 if (*status & UART_LSR_SPECIAL)
2100                         goto intr_old;
2101                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2102                                 (*status & MOXA_MUST_LSR_RERR))
2103                         goto intr_old;
2104                 if (*status & MOXA_MUST_LSR_RERR)
2105                         goto intr_old;
2106
2107                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2108
2109                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2110                         gdl &= MOXA_MUST_GDL_MASK;
2111                 if (gdl >= recv_room) {
2112                         if (!port->ldisc_stop_rx)
2113                                 mxser_stoprx(tty);
2114                 }
2115                 while (gdl--) {
2116                         ch = inb(port->ioaddr + UART_RX);
2117                         tty_insert_flip_char(tty, ch, 0);
2118                         cnt++;
2119                 }
2120                 goto end_intr;
2121         }
2122 intr_old:
2123
2124         do {
2125                 if (max-- < 0)
2126                         break;
2127
2128                 ch = inb(port->ioaddr + UART_RX);
2129                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2130                         outb(0x23, port->ioaddr + UART_FCR);
2131                 *status &= port->read_status_mask;
2132                 if (*status & port->ignore_status_mask) {
2133                         if (++ignored > 100)
2134                                 break;
2135                 } else {
2136                         char flag = 0;
2137                         if (*status & UART_LSR_SPECIAL) {
2138                                 if (*status & UART_LSR_BI) {
2139                                         flag = TTY_BREAK;
2140                                         port->icount.brk++;
2141
2142                                         if (port->port.flags & ASYNC_SAK)
2143                                                 do_SAK(tty);
2144                                 } else if (*status & UART_LSR_PE) {
2145                                         flag = TTY_PARITY;
2146                                         port->icount.parity++;
2147                                 } else if (*status & UART_LSR_FE) {
2148                                         flag = TTY_FRAME;
2149                                         port->icount.frame++;
2150                                 } else if (*status & UART_LSR_OE) {
2151                                         flag = TTY_OVERRUN;
2152                                         port->icount.overrun++;
2153                                 } else
2154                                         flag = TTY_BREAK;
2155                         }
2156                         tty_insert_flip_char(tty, ch, flag);
2157                         cnt++;
2158                         if (cnt >= recv_room) {
2159                                 if (!port->ldisc_stop_rx)
2160                                         mxser_stoprx(tty);
2161                                 break;
2162                         }
2163
2164                 }
2165
2166                 if (port->board->chip_flag)
2167                         break;
2168
2169                 *status = inb(port->ioaddr + UART_LSR);
2170         } while (*status & UART_LSR_DR);
2171
2172 end_intr:
2173         mxvar_log.rxcnt[tty->index] += cnt;
2174         port->mon_data.rxcnt += cnt;
2175         port->mon_data.up_rxcnt += cnt;
2176
2177         /*
2178          * We are called from an interrupt context with &port->slock
2179          * being held. Drop it temporarily in order to prevent
2180          * recursive locking.
2181          */
2182         spin_unlock(&port->slock);
2183         tty_flip_buffer_push(tty);
2184         spin_lock(&port->slock);
2185 }
2186
2187 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2188 {
2189         int count, cnt;
2190
2191         if (port->x_char) {
2192                 outb(port->x_char, port->ioaddr + UART_TX);
2193                 port->x_char = 0;
2194                 mxvar_log.txcnt[tty->index]++;
2195                 port->mon_data.txcnt++;
2196                 port->mon_data.up_txcnt++;
2197                 port->icount.tx++;
2198                 return;
2199         }
2200
2201         if (port->port.xmit_buf == NULL)
2202                 return;
2203
2204         if (port->xmit_cnt <= 0 || tty->stopped ||
2205                         (tty->hw_stopped &&
2206                         (port->type != PORT_16550A) &&
2207                         (!port->board->chip_flag))) {
2208                 port->IER &= ~UART_IER_THRI;
2209                 outb(port->IER, port->ioaddr + UART_IER);
2210                 return;
2211         }
2212
2213         cnt = port->xmit_cnt;
2214         count = port->xmit_fifo_size;
2215         do {
2216                 outb(port->port.xmit_buf[port->xmit_tail++],
2217                         port->ioaddr + UART_TX);
2218                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2219                 if (--port->xmit_cnt <= 0)
2220                         break;
2221         } while (--count > 0);
2222         mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2223
2224         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2225         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2226         port->icount.tx += (cnt - port->xmit_cnt);
2227
2228         if (port->xmit_cnt < WAKEUP_CHARS && tty)
2229                 tty_wakeup(tty);
2230
2231         if (port->xmit_cnt <= 0) {
2232                 port->IER &= ~UART_IER_THRI;
2233                 outb(port->IER, port->ioaddr + UART_IER);
2234         }
2235 }
2236
2237 /*
2238  * This is the serial driver's generic interrupt routine
2239  */
2240 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2241 {
2242         int status, iir, i;
2243         struct mxser_board *brd = NULL;
2244         struct mxser_port *port;
2245         int max, irqbits, bits, msr;
2246         unsigned int int_cnt, pass_counter = 0;
2247         int handled = IRQ_NONE;
2248         struct tty_struct *tty;
2249
2250         for (i = 0; i < MXSER_BOARDS; i++)
2251                 if (dev_id == &mxser_boards[i]) {
2252                         brd = dev_id;
2253                         break;
2254                 }
2255
2256         if (i == MXSER_BOARDS)
2257                 goto irq_stop;
2258         if (brd == NULL)
2259                 goto irq_stop;
2260         max = brd->info->nports;
2261         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2262                 irqbits = inb(brd->vector) & brd->vector_mask;
2263                 if (irqbits == brd->vector_mask)
2264                         break;
2265
2266                 handled = IRQ_HANDLED;
2267                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2268                         if (irqbits == brd->vector_mask)
2269                                 break;
2270                         if (bits & irqbits)
2271                                 continue;
2272                         port = &brd->ports[i];
2273
2274                         int_cnt = 0;
2275                         spin_lock(&port->slock);
2276                         do {
2277                                 iir = inb(port->ioaddr + UART_IIR);
2278                                 if (iir & UART_IIR_NO_INT)
2279                                         break;
2280                                 iir &= MOXA_MUST_IIR_MASK;
2281                                 tty = tty_port_tty_get(&port->port);
2282                                 if (!tty ||
2283                                                 (port->port.flags & ASYNC_CLOSING) ||
2284                                                 !(port->port.flags &
2285                                                         ASYNC_INITIALIZED)) {
2286                                         status = inb(port->ioaddr + UART_LSR);
2287                                         outb(0x27, port->ioaddr + UART_FCR);
2288                                         inb(port->ioaddr + UART_MSR);
2289                                         tty_kref_put(tty);
2290                                         break;
2291                                 }
2292
2293                                 status = inb(port->ioaddr + UART_LSR);
2294
2295                                 if (status & UART_LSR_PE)
2296                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2297                                 if (status & UART_LSR_FE)
2298                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2299                                 if (status & UART_LSR_OE)
2300                                         port->err_shadow |=
2301                                                 NPPI_NOTIFY_HW_OVERRUN;
2302                                 if (status & UART_LSR_BI)
2303                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2304
2305                                 if (port->board->chip_flag) {
2306                                         if (iir == MOXA_MUST_IIR_GDA ||
2307                                             iir == MOXA_MUST_IIR_RDA ||
2308                                             iir == MOXA_MUST_IIR_RTO ||
2309                                             iir == MOXA_MUST_IIR_LSR)
2310                                                 mxser_receive_chars(tty, port,
2311                                                                 &status);
2312
2313                                 } else {
2314                                         status &= port->read_status_mask;
2315                                         if (status & UART_LSR_DR)
2316                                                 mxser_receive_chars(tty, port,
2317                                                                 &status);
2318                                 }
2319                                 msr = inb(port->ioaddr + UART_MSR);
2320                                 if (msr & UART_MSR_ANY_DELTA)
2321                                         mxser_check_modem_status(tty, port, msr);
2322
2323                                 if (port->board->chip_flag) {
2324                                         if (iir == 0x02 && (status &
2325                                                                 UART_LSR_THRE))
2326                                                 mxser_transmit_chars(tty, port);
2327                                 } else {
2328                                         if (status & UART_LSR_THRE)
2329                                                 mxser_transmit_chars(tty, port);
2330                                 }
2331                                 tty_kref_put(tty);
2332                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2333                         spin_unlock(&port->slock);
2334                 }
2335         }
2336
2337 irq_stop:
2338         return handled;
2339 }
2340
2341 static const struct tty_operations mxser_ops = {
2342         .open = mxser_open,
2343         .close = mxser_close,
2344         .write = mxser_write,
2345         .put_char = mxser_put_char,
2346         .flush_chars = mxser_flush_chars,
2347         .write_room = mxser_write_room,
2348         .chars_in_buffer = mxser_chars_in_buffer,
2349         .flush_buffer = mxser_flush_buffer,
2350         .ioctl = mxser_ioctl,
2351         .throttle = mxser_throttle,
2352         .unthrottle = mxser_unthrottle,
2353         .set_termios = mxser_set_termios,
2354         .stop = mxser_stop,
2355         .start = mxser_start,
2356         .hangup = mxser_hangup,
2357         .break_ctl = mxser_rs_break,
2358         .wait_until_sent = mxser_wait_until_sent,
2359         .tiocmget = mxser_tiocmget,
2360         .tiocmset = mxser_tiocmset,
2361 };
2362
2363 struct tty_port_operations mxser_port_ops = {
2364         .carrier_raised = mxser_carrier_raised,
2365         .dtr_rts = mxser_dtr_rts,
2366 };
2367
2368 /*
2369  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2370  */
2371
2372 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2373                 unsigned int irq)
2374 {
2375         if (irq)
2376                 free_irq(brd->irq, brd);
2377         if (pdev != NULL) {     /* PCI */
2378 #ifdef CONFIG_PCI
2379                 pci_release_region(pdev, 2);
2380                 pci_release_region(pdev, 3);
2381 #endif
2382         } else {
2383                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2384                 release_region(brd->vector, 1);
2385         }
2386 }
2387
2388 static int __devinit mxser_initbrd(struct mxser_board *brd,
2389                 struct pci_dev *pdev)
2390 {
2391         struct mxser_port *info;
2392         unsigned int i;
2393         int retval;
2394
2395         printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2396                         brd->ports[0].max_baud);
2397
2398         for (i = 0; i < brd->info->nports; i++) {
2399                 info = &brd->ports[i];
2400                 tty_port_init(&info->port);
2401                 info->port.ops = &mxser_port_ops;
2402                 info->board = brd;
2403                 info->stop_rx = 0;
2404                 info->ldisc_stop_rx = 0;
2405
2406                 /* Enhance mode enabled here */
2407                 if (brd->chip_flag != MOXA_OTHER_UART)
2408                         mxser_enable_must_enchance_mode(info->ioaddr);
2409
2410                 info->port.flags = ASYNC_SHARE_IRQ;
2411                 info->type = brd->uart_type;
2412
2413                 process_txrx_fifo(info);
2414
2415                 info->custom_divisor = info->baud_base * 16;
2416                 info->port.close_delay = 5 * HZ / 10;
2417                 info->port.closing_wait = 30 * HZ;
2418                 info->normal_termios = mxvar_sdriver->init_termios;
2419                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2420                 info->err_shadow = 0;
2421                 spin_lock_init(&info->slock);
2422
2423                 /* before set INT ISR, disable all int */
2424                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2425                         info->ioaddr + UART_IER);
2426         }
2427
2428         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2429                         brd);
2430         if (retval) {
2431                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2432                         "conflict with another device.\n",
2433                         brd->info->name, brd->irq);
2434                 /* We hold resources, we need to release them. */
2435                 mxser_release_res(brd, pdev, 0);
2436         }
2437         return retval;
2438 }
2439
2440 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2441 {
2442         int id, i, bits;
2443         unsigned short regs[16], irq;
2444         unsigned char scratch, scratch2;
2445
2446         brd->chip_flag = MOXA_OTHER_UART;
2447
2448         id = mxser_read_register(cap, regs);
2449         switch (id) {
2450         case C168_ASIC_ID:
2451                 brd->info = &mxser_cards[0];
2452                 break;
2453         case C104_ASIC_ID:
2454                 brd->info = &mxser_cards[1];
2455                 break;
2456         case CI104J_ASIC_ID:
2457                 brd->info = &mxser_cards[2];
2458                 break;
2459         case C102_ASIC_ID:
2460                 brd->info = &mxser_cards[5];
2461                 break;
2462         case CI132_ASIC_ID:
2463                 brd->info = &mxser_cards[6];
2464                 break;
2465         case CI134_ASIC_ID:
2466                 brd->info = &mxser_cards[7];
2467                 break;
2468         default:
2469                 return 0;
2470         }
2471
2472         irq = 0;
2473         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2474            Flag-hack checks if configuration should be read as 2-port here. */
2475         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2476                 irq = regs[9] & 0xF000;
2477                 irq = irq | (irq >> 4);
2478                 if (irq != (regs[9] & 0xFF00))
2479                         goto err_irqconflict;
2480         } else if (brd->info->nports == 4) {
2481                 irq = regs[9] & 0xF000;
2482                 irq = irq | (irq >> 4);
2483                 irq = irq | (irq >> 8);
2484                 if (irq != regs[9])
2485                         goto err_irqconflict;
2486         } else if (brd->info->nports == 8) {
2487                 irq = regs[9] & 0xF000;
2488                 irq = irq | (irq >> 4);
2489                 irq = irq | (irq >> 8);
2490                 if ((irq != regs[9]) || (irq != regs[10]))
2491                         goto err_irqconflict;
2492         }
2493
2494         if (!irq) {
2495                 printk(KERN_ERR "mxser: interrupt number unset\n");
2496                 return -EIO;
2497         }
2498         brd->irq = ((int)(irq & 0xF000) >> 12);
2499         for (i = 0; i < 8; i++)
2500                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2501         if ((regs[12] & 0x80) == 0) {
2502                 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2503                 return -EIO;
2504         }
2505         brd->vector = (int)regs[11];    /* interrupt vector */
2506         if (id == 1)
2507                 brd->vector_mask = 0x00FF;
2508         else
2509                 brd->vector_mask = 0x000F;
2510         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2511                 if (regs[12] & bits) {
2512                         brd->ports[i].baud_base = 921600;
2513                         brd->ports[i].max_baud = 921600;
2514                 } else {
2515                         brd->ports[i].baud_base = 115200;
2516                         brd->ports[i].max_baud = 115200;
2517                 }
2518         }
2519         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2520         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2521         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2522         outb(scratch2, cap + UART_LCR);
2523         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2524         scratch = inb(cap + UART_IIR);
2525
2526         if (scratch & 0xC0)
2527                 brd->uart_type = PORT_16550A;
2528         else
2529                 brd->uart_type = PORT_16450;
2530         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2531                         "mxser(IO)")) {
2532                 printk(KERN_ERR "mxser: can't request ports I/O region: "
2533                                 "0x%.8lx-0x%.8lx\n",
2534                                 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2535                                 8 * brd->info->nports - 1);
2536                 return -EIO;
2537         }
2538         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2539                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2540                 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2541                                 "0x%.8lx-0x%.8lx\n",
2542                                 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2543                                 8 * brd->info->nports - 1);
2544                 return -EIO;
2545         }
2546         return brd->info->nports;
2547
2548 err_irqconflict:
2549         printk(KERN_ERR "mxser: invalid interrupt number\n");
2550         return -EIO;
2551 }
2552
2553 static int __devinit mxser_probe(struct pci_dev *pdev,
2554                 const struct pci_device_id *ent)
2555 {
2556 #ifdef CONFIG_PCI
2557         struct mxser_board *brd;
2558         unsigned int i, j;
2559         unsigned long ioaddress;
2560         int retval = -EINVAL;
2561
2562         for (i = 0; i < MXSER_BOARDS; i++)
2563                 if (mxser_boards[i].info == NULL)
2564                         break;
2565
2566         if (i >= MXSER_BOARDS) {
2567                 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2568                                 "not configured\n", MXSER_BOARDS);
2569                 goto err;
2570         }
2571
2572         brd = &mxser_boards[i];
2573         brd->idx = i * MXSER_PORTS_PER_BOARD;
2574         dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2575                 mxser_cards[ent->driver_data].name,
2576                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2577
2578         retval = pci_enable_device(pdev);
2579         if (retval) {
2580                 dev_err(&pdev->dev, "PCI enable failed\n");
2581                 goto err;
2582         }
2583
2584         /* io address */
2585         ioaddress = pci_resource_start(pdev, 2);
2586         retval = pci_request_region(pdev, 2, "mxser(IO)");
2587         if (retval)
2588                 goto err;
2589
2590         brd->info = &mxser_cards[ent->driver_data];
2591         for (i = 0; i < brd->info->nports; i++)
2592                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2593
2594         /* vector */
2595         ioaddress = pci_resource_start(pdev, 3);
2596         retval = pci_request_region(pdev, 3, "mxser(vector)");
2597         if (retval)
2598                 goto err_relio;
2599         brd->vector = ioaddress;
2600
2601         /* irq */
2602         brd->irq = pdev->irq;
2603
2604         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2605         brd->uart_type = PORT_16550A;
2606         brd->vector_mask = 0;
2607
2608         for (i = 0; i < brd->info->nports; i++) {
2609                 for (j = 0; j < UART_INFO_NUM; j++) {
2610                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2611                                 brd->ports[i].max_baud =
2612                                         Gpci_uart_info[j].max_baud;
2613
2614                                 /* exception....CP-102 */
2615                                 if (brd->info->flags & MXSER_HIGHBAUD)
2616                                         brd->ports[i].max_baud = 921600;
2617                                 break;
2618                         }
2619                 }
2620         }
2621
2622         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2623                 for (i = 0; i < brd->info->nports; i++) {
2624                         if (i < 4)
2625                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2626                         else
2627                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2628                 }
2629                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2630                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2631         }
2632
2633         for (i = 0; i < brd->info->nports; i++) {
2634                 brd->vector_mask |= (1 << i);
2635                 brd->ports[i].baud_base = 921600;
2636         }
2637
2638         /* mxser_initbrd will hook ISR. */
2639         retval = mxser_initbrd(brd, pdev);
2640         if (retval)
2641                 goto err_null;
2642
2643         for (i = 0; i < brd->info->nports; i++)
2644                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2645
2646         pci_set_drvdata(pdev, brd);
2647
2648         return 0;
2649 err_relio:
2650         pci_release_region(pdev, 2);
2651 err_null:
2652         brd->info = NULL;
2653 err:
2654         return retval;
2655 #else
2656         return -ENODEV;
2657 #endif
2658 }
2659
2660 static void __devexit mxser_remove(struct pci_dev *pdev)
2661 {
2662         struct mxser_board *brd = pci_get_drvdata(pdev);
2663         unsigned int i;
2664
2665         for (i = 0; i < brd->info->nports; i++)
2666                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2667
2668         mxser_release_res(brd, pdev, 1);
2669         brd->info = NULL;
2670 }
2671
2672 static struct pci_driver mxser_driver = {
2673         .name = "mxser",
2674         .id_table = mxser_pcibrds,
2675         .probe = mxser_probe,
2676         .remove = __devexit_p(mxser_remove)
2677 };
2678
2679 static int __init mxser_module_init(void)
2680 {
2681         struct mxser_board *brd;
2682         unsigned int b, i, m;
2683         int retval;
2684
2685         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2686         if (!mxvar_sdriver)
2687                 return -ENOMEM;
2688
2689         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2690                 MXSER_VERSION);
2691
2692         /* Initialize the tty_driver structure */
2693         mxvar_sdriver->owner = THIS_MODULE;
2694         mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2695         mxvar_sdriver->name = "ttyMI";
2696         mxvar_sdriver->major = ttymajor;
2697         mxvar_sdriver->minor_start = 0;
2698         mxvar_sdriver->num = MXSER_PORTS + 1;
2699         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2700         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2701         mxvar_sdriver->init_termios = tty_std_termios;
2702         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2703         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2704         tty_set_operations(mxvar_sdriver, &mxser_ops);
2705
2706         retval = tty_register_driver(mxvar_sdriver);
2707         if (retval) {
2708                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2709                                 "tty driver !\n");
2710                 goto err_put;
2711         }
2712
2713         /* Start finding ISA boards here */
2714         for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2715                 if (!ioaddr[b])
2716                         continue;
2717
2718                 brd = &mxser_boards[m];
2719                 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2720                 if (retval <= 0) {
2721                         brd->info = NULL;
2722                         continue;
2723                 }
2724
2725                 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2726                                 brd->info->name, ioaddr[b]);
2727
2728                 /* mxser_initbrd will hook ISR. */
2729                 if (mxser_initbrd(brd, NULL) < 0) {
2730                         brd->info = NULL;
2731                         continue;
2732                 }
2733
2734                 brd->idx = m * MXSER_PORTS_PER_BOARD;
2735                 for (i = 0; i < brd->info->nports; i++)
2736                         tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2737
2738                 m++;
2739         }
2740
2741         retval = pci_register_driver(&mxser_driver);
2742         if (retval) {
2743                 printk(KERN_ERR "mxser: can't register pci driver\n");
2744                 if (!m) {
2745                         retval = -ENODEV;
2746                         goto err_unr;
2747                 } /* else: we have some ISA cards under control */
2748         }
2749
2750         return 0;
2751 err_unr:
2752         tty_unregister_driver(mxvar_sdriver);
2753 err_put:
2754         put_tty_driver(mxvar_sdriver);
2755         return retval;
2756 }
2757
2758 static void __exit mxser_module_exit(void)
2759 {
2760         unsigned int i, j;
2761
2762         pci_unregister_driver(&mxser_driver);
2763
2764         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2765                 if (mxser_boards[i].info != NULL)
2766                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2767                                 tty_unregister_device(mxvar_sdriver,
2768                                                 mxser_boards[i].idx + j);
2769         tty_unregister_driver(mxvar_sdriver);
2770         put_tty_driver(mxvar_sdriver);
2771
2772         for (i = 0; i < MXSER_BOARDS; i++)
2773                 if (mxser_boards[i].info != NULL)
2774                         mxser_release_res(&mxser_boards[i], NULL, 1);
2775 }
2776
2777 module_init(mxser_module_init);
2778 module_exit(mxser_module_exit);