drivers/tty/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/timer.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/tty.h>
  29 #include <linux/tty_flip.h>
  30 #include <linux/serial.h>
  31 #include <linux/serial_reg.h>
  32 #include <linux/major.h>
  33 #include <linux/string.h>
  34 #include <linux/fcntl.h>
  35 #include <linux/ptrace.h>
  36 #include <linux/ioport.h>
  37 #include <linux/mm.h>
  38 #include <linux/delay.h>
  39 #include <linux/pci.h>
  40 #include <linux/bitops.h>
  41 #include <linux/slab.h>
  42 #include <linux/ratelimit.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 #ifdef  CONFIG_PCI
 308 static void mxser_disable_must_enchance_mode(unsigned long baseio)
 309 {
 310         u8 oldlcr;
 311         u8 efr;
 312
 313         oldlcr = inb(baseio + UART_LCR);
 314         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 315
 316         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 317         efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
 318
 319         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 320         outb(oldlcr, baseio + UART_LCR);
 321 }
 322 #endif
 323
 324 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
 325 {
 326         u8 oldlcr;
 327         u8 efr;
 328
 329         oldlcr = inb(baseio + UART_LCR);
 330         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 331
 332         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 333         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 334         efr |= MOXA_MUST_EFR_BANK0;
 335
 336         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 337         outb(value, baseio + MOXA_MUST_XON1_REGISTER);
 338         outb(oldlcr, baseio + UART_LCR);
 339 }
 340
 341 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
 342 {
 343         u8 oldlcr;
 344         u8 efr;
 345
 346         oldlcr = inb(baseio + UART_LCR);
 347         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 348
 349         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 350         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 351         efr |= MOXA_MUST_EFR_BANK0;
 352
 353         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 354         outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
 355         outb(oldlcr, baseio + UART_LCR);
 356 }
 357
 358 static void mxser_set_must_fifo_value(struct mxser_port *info)
 359 {
 360         u8 oldlcr;
 361         u8 efr;
 362
 363         oldlcr = inb(info->ioaddr + UART_LCR);
 364         outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
 365
 366         efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
 367         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 368         efr |= MOXA_MUST_EFR_BANK1;
 369
 370         outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
 371         outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
 372         outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
 373         outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
 374         outb(oldlcr, info->ioaddr + UART_LCR);
 375 }
 376
 377 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
 378 {
 379         u8 oldlcr;
 380         u8 efr;
 381
 382         oldlcr = inb(baseio + UART_LCR);
 383         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 384
 385         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 386         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 387         efr |= MOXA_MUST_EFR_BANK2;
 388
 389         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 390         outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
 391         outb(oldlcr, baseio + UART_LCR);
 392 }
 393
 394 #ifdef CONFIG_PCI
 395 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
 396 {
 397         u8 oldlcr;
 398         u8 efr;
 399
 400         oldlcr = inb(baseio + UART_LCR);
 401         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 402
 403         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 404         efr &= ~MOXA_MUST_EFR_BANK_MASK;
 405         efr |= MOXA_MUST_EFR_BANK2;
 406
 407         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 408         *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
 409         outb(oldlcr, baseio + UART_LCR);
 410 }
 411 #endif
 412
 413 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
 414 {
 415         u8 oldlcr;
 416         u8 efr;
 417
 418         oldlcr = inb(baseio + UART_LCR);
 419         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 420
 421         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 422         efr &= ~MOXA_MUST_EFR_SF_MASK;
 423
 424         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 425         outb(oldlcr, baseio + UART_LCR);
 426 }
 427
 428 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
 429 {
 430         u8 oldlcr;
 431         u8 efr;
 432
 433         oldlcr = inb(baseio + UART_LCR);
 434         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 435
 436         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 437         efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 438         efr |= MOXA_MUST_EFR_SF_TX1;
 439
 440         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 441         outb(oldlcr, baseio + UART_LCR);
 442 }
 443
 444 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
 445 {
 446         u8 oldlcr;
 447         u8 efr;
 448
 449         oldlcr = inb(baseio + UART_LCR);
 450         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 451
 452         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 453         efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 454
 455         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 456         outb(oldlcr, baseio + UART_LCR);
 457 }
 458
 459 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
 460 {
 461         u8 oldlcr;
 462         u8 efr;
 463
 464         oldlcr = inb(baseio + UART_LCR);
 465         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 466
 467         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 468         efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 469         efr |= MOXA_MUST_EFR_SF_RX1;
 470
 471         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 472         outb(oldlcr, baseio + UART_LCR);
 473 }
 474
 475 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
 476 {
 477         u8 oldlcr;
 478         u8 efr;
 479
 480         oldlcr = inb(baseio + UART_LCR);
 481         outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 482
 483         efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 484         efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 485
 486         outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 487         outb(oldlcr, baseio + UART_LCR);
 488 }
 489
 490 #ifdef CONFIG_PCI
 491 static int __devinit CheckIsMoxaMust(unsigned long io)
 492 {
 493         u8 oldmcr, hwid;
 494         int i;
 495
 496         outb(0, io + UART_LCR);
 497         mxser_disable_must_enchance_mode(io);
 498         oldmcr = inb(io + UART_MCR);
 499         outb(0, io + UART_MCR);
 500         mxser_set_must_xon1_value(io, 0x11);
 501         if ((hwid = inb(io + UART_MCR)) != 0) {
 502                 outb(oldmcr, io + UART_MCR);
 503                 return MOXA_OTHER_UART;
 504         }
 505
 506         mxser_get_must_hardware_id(io, &hwid);
 507         for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 508                 if (hwid == Gpci_uart_info[i].type)
 509                         return (int)hwid;
 510         }
 511         return MOXA_OTHER_UART;
 512 }
 513 #endif
 514
 515 static void process_txrx_fifo(struct mxser_port *info)
 516 {
 517         int i;
 518
 519         if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 520                 info->rx_trigger = 1;
 521                 info->rx_high_water = 1;
 522                 info->rx_low_water = 1;
 523                 info->xmit_fifo_size = 1;
 524         } else
 525                 for (i = 0; i < UART_INFO_NUM; i++)
 526                         if (info->board->chip_flag == Gpci_uart_info[i].type) {
 527                                 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 528                                 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 529                                 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 530                                 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 531                                 break;
 532                         }
 533 }
 534
 535 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 536 {
 537         static unsigned char mxser_msr[MXSER_PORTS + 1];
 538         unsigned char status = 0;
 539
 540         status = inb(baseaddr + UART_MSR);
 541
 542         mxser_msr[port] &= 0x0F;
 543         mxser_msr[port] |= status;
 544         status = mxser_msr[port];
 545         if (mode)
 546                 mxser_msr[port] = 0;
 547
 548         return status;
 549 }
 550
 551 static int mxser_carrier_raised(struct tty_port *port)
 552 {
 553         struct mxser_port *mp = container_of(port, struct mxser_port, port);
 554         return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 555 }
 556
 557 static void mxser_dtr_rts(struct tty_port *port, int on)
 558 {
 559         struct mxser_port *mp = container_of(port, struct mxser_port, port);
 560         unsigned long flags;
 561
 562         spin_lock_irqsave(&mp->slock, flags);
 563         if (on)
 564                 outb(inb(mp->ioaddr + UART_MCR) |
 565                         UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
 566         else
 567                 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
 568                         mp->ioaddr + UART_MCR);
 569         spin_unlock_irqrestore(&mp->slock, flags);
 570 }
 571
 572 static int mxser_set_baud(struct tty_struct *tty, long newspd)
 573 {
 574         struct mxser_port *info = tty->driver_data;
 575         int quot = 0, baud;
 576         unsigned char cval;
 577
 578         if (!info->ioaddr)
 579                 return -1;
 580
 581         if (newspd > info->max_baud)
 582                 return -1;
 583
 584         if (newspd == 134) {
 585                 quot = 2 * info->baud_base / 269;
 586                 tty_encode_baud_rate(tty, 134, 134);
 587         } else if (newspd) {
 588                 quot = info->baud_base / newspd;
 589                 if (quot == 0)
 590                         quot = 1;
 591                 baud = info->baud_base/quot;
 592                 tty_encode_baud_rate(tty, baud, baud);
 593         } else {
 594                 quot = 0;
 595         }
 596
 597         info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 598         info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 599
 600         if (quot) {
 601                 info->MCR |= UART_MCR_DTR;
 602                 outb(info->MCR, info->ioaddr + UART_MCR);
 603         } else {
 604                 info->MCR &= ~UART_MCR_DTR;
 605                 outb(info->MCR, info->ioaddr + UART_MCR);
 606                 return 0;
 607         }
 608
 609         cval = inb(info->ioaddr + UART_LCR);
 610
 611         outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 612
 613         outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 614         outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 615         outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 616
 617 #ifdef BOTHER
 618         if (C_BAUD(tty) == BOTHER) {
 619                 quot = info->baud_base % newspd;
 620                 quot *= 8;
 621                 if (quot % newspd > newspd / 2) {
 622                         quot /= newspd;
 623                         quot++;
 624                 } else
 625                         quot /= newspd;
 626
 627                 mxser_set_must_enum_value(info->ioaddr, quot);
 628         } else
 629 #endif
 630                 mxser_set_must_enum_value(info->ioaddr, 0);
 631
 632         return 0;
 633 }
 634
 635 /*
 636  * This routine is called to set the UART divisor registers to match
 637  * the specified baud rate for a serial port.
 638  */
 639 static int mxser_change_speed(struct tty_struct *tty,
 640                                         struct ktermios *old_termios)
 641 {
 642         struct mxser_port *info = tty->driver_data;
 643         unsigned cflag, cval, fcr;
 644         int ret = 0;
 645         unsigned char status;
 646
 647         cflag = tty->termios->c_cflag;
 648         if (!info->ioaddr)
 649                 return ret;
 650
 651         if (mxser_set_baud_method[tty->index] == 0)
 652                 mxser_set_baud(tty, tty_get_baud_rate(tty));
 653
 654         /* byte size and parity */
 655         switch (cflag & CSIZE) {
 656         case CS5:
 657                 cval = 0x00;
 658                 break;
 659         case CS6:
 660                 cval = 0x01;
 661                 break;
 662         case CS7:
 663                 cval = 0x02;
 664                 break;
 665         case CS8:
 666                 cval = 0x03;
 667                 break;
 668         default:
 669                 cval = 0x00;
 670                 break;          /* too keep GCC shut... */
 671         }
 672         if (cflag & CSTOPB)
 673                 cval |= 0x04;
 674         if (cflag & PARENB)
 675                 cval |= UART_LCR_PARITY;
 676         if (!(cflag & PARODD))
 677                 cval |= UART_LCR_EPAR;
 678         if (cflag & CMSPAR)
 679                 cval |= UART_LCR_SPAR;
 680
 681         if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 682                 if (info->board->chip_flag) {
 683                         fcr = UART_FCR_ENABLE_FIFO;
 684                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 685                         mxser_set_must_fifo_value(info);
 686                 } else
 687                         fcr = 0;
 688         } else {
 689                 fcr = UART_FCR_ENABLE_FIFO;
 690                 if (info->board->chip_flag) {
 691                         fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 692                         mxser_set_must_fifo_value(info);
 693                 } else {
 694                         switch (info->rx_trigger) {
 695                         case 1:
 696                                 fcr |= UART_FCR_TRIGGER_1;
 697                                 break;
 698                         case 4:
 699                                 fcr |= UART_FCR_TRIGGER_4;
 700                                 break;
 701                         case 8:
 702                                 fcr |= UART_FCR_TRIGGER_8;
 703                                 break;
 704                         default:
 705                                 fcr |= UART_FCR_TRIGGER_14;
 706                                 break;
 707                         }
 708                 }
 709         }
 710
 711         /* CTS flow control flag and modem status interrupts */
 712         info->IER &= ~UART_IER_MSI;
 713         info->MCR &= ~UART_MCR_AFE;
 714         if (cflag & CRTSCTS) {
 715                 info->port.flags |= ASYNC_CTS_FLOW;
 716                 info->IER |= UART_IER_MSI;
 717                 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 718                         info->MCR |= UART_MCR_AFE;
 719                 } else {
 720                         status = inb(info->ioaddr + UART_MSR);
 721                         if (tty->hw_stopped) {
 722                                 if (status & UART_MSR_CTS) {
 723                                         tty->hw_stopped = 0;
 724                                         if (info->type != PORT_16550A &&
 725                                                         !info->board->chip_flag) {
 726                                                 outb(info->IER & ~UART_IER_THRI,
 727                                                         info->ioaddr +
 728                                                         UART_IER);
 729                                                 info->IER |= UART_IER_THRI;
 730                                                 outb(info->IER, info->ioaddr +
 731                                                                 UART_IER);
 732                                         }
 733                                         tty_wakeup(tty);
 734                                 }
 735                         } else {
 736                                 if (!(status & UART_MSR_CTS)) {
 737                                         tty->hw_stopped = 1;
 738                                         if ((info->type != PORT_16550A) &&
 739                                                         (!info->board->chip_flag)) {
 740                                                 info->IER &= ~UART_IER_THRI;
 741                                                 outb(info->IER, info->ioaddr +
 742                                                                 UART_IER);
 743                                         }
 744                                 }
 745                         }
 746                 }
 747         } else {
 748                 info->port.flags &= ~ASYNC_CTS_FLOW;
 749         }
 750         outb(info->MCR, info->ioaddr + UART_MCR);
 751         if (cflag & CLOCAL) {
 752                 info->port.flags &= ~ASYNC_CHECK_CD;
 753         } else {
 754                 info->port.flags |= ASYNC_CHECK_CD;
 755                 info->IER |= UART_IER_MSI;
 756         }
 757         outb(info->IER, info->ioaddr + UART_IER);
 758
 759         /*
 760          * Set up parity check flag
 761          */
 762         info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 763         if (I_INPCK(tty))
 764                 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 765         if (I_BRKINT(tty) || I_PARMRK(tty))
 766                 info->read_status_mask |= UART_LSR_BI;
 767
 768         info->ignore_status_mask = 0;
 769
 770         if (I_IGNBRK(tty)) {
 771                 info->ignore_status_mask |= UART_LSR_BI;
 772                 info->read_status_mask |= UART_LSR_BI;
 773                 /*
 774                  * If we're ignore parity and break indicators, ignore
 775                  * overruns too.  (For real raw support).
 776                  */
 777                 if (I_IGNPAR(tty)) {
 778                         info->ignore_status_mask |=
 779                                                 UART_LSR_OE |
 780                                                 UART_LSR_PE |
 781                                                 UART_LSR_FE;
 782                         info->read_status_mask |=
 783                                                 UART_LSR_OE |
 784                                                 UART_LSR_PE |
 785                                                 UART_LSR_FE;
 786                 }
 787         }
 788         if (info->board->chip_flag) {
 789                 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
 790                 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
 791                 if (I_IXON(tty)) {
 792                         mxser_enable_must_rx_software_flow_control(
 793                                         info->ioaddr);
 794                 } else {
 795                         mxser_disable_must_rx_software_flow_control(
 796                                         info->ioaddr);
 797                 }
 798                 if (I_IXOFF(tty)) {
 799                         mxser_enable_must_tx_software_flow_control(
 800                                         info->ioaddr);
 801                 } else {
 802                         mxser_disable_must_tx_software_flow_control(
 803                                         info->ioaddr);
 804                 }
 805         }
 806
 807
 808         outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 809         outb(cval, info->ioaddr + UART_LCR);
 810
 811         return ret;
 812 }
 813
 814 static void mxser_check_modem_status(struct tty_struct *tty,
 815                                 struct mxser_port *port, int status)
 816 {
 817         /* update input line counters */
 818         if (status & UART_MSR_TERI)
 819                 port->icount.rng++;
 820         if (status & UART_MSR_DDSR)
 821                 port->icount.dsr++;
 822         if (status & UART_MSR_DDCD)
 823                 port->icount.dcd++;
 824         if (status & UART_MSR_DCTS)
 825                 port->icount.cts++;
 826         port->mon_data.modem_status = status;
 827         wake_up_interruptible(&port->port.delta_msr_wait);
 828
 829         if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 830                 if (status & UART_MSR_DCD)
 831                         wake_up_interruptible(&port->port.open_wait);
 832         }
 833
 834         if (port->port.flags & ASYNC_CTS_FLOW) {
 835                 if (tty->hw_stopped) {
 836                         if (status & UART_MSR_CTS) {
 837                                 tty->hw_stopped = 0;
 838
 839                                 if ((port->type != PORT_16550A) &&
 840                                                 (!port->board->chip_flag)) {
 841                                         outb(port->IER & ~UART_IER_THRI,
 842                                                 port->ioaddr + UART_IER);
 843                                         port->IER |= UART_IER_THRI;
 844                                         outb(port->IER, port->ioaddr +
 845                                                         UART_IER);
 846                                 }
 847                                 tty_wakeup(tty);
 848                         }
 849                 } else {
 850                         if (!(status & UART_MSR_CTS)) {
 851                                 tty->hw_stopped = 1;
 852                                 if (port->type != PORT_16550A &&
 853                                                 !port->board->chip_flag) {
 854                                         port->IER &= ~UART_IER_THRI;
 855                                         outb(port->IER, port->ioaddr +
 856                                                         UART_IER);
 857                                 }
 858                         }
 859                 }
 860         }
 861 }
 862
 863 static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
 864 {
 865         struct mxser_port *info = container_of(port, struct mxser_port, port);
 866         unsigned long page;
 867         unsigned long flags;
 868
 869         page = __get_free_page(GFP_KERNEL);
 870         if (!page)
 871                 return -ENOMEM;
 872
 873         spin_lock_irqsave(&info->slock, flags);
 874
 875         if (!info->ioaddr || !info->type) {
 876                 set_bit(TTY_IO_ERROR, &tty->flags);
 877                 free_page(page);
 878                 spin_unlock_irqrestore(&info->slock, flags);
 879                 return 0;
 880         }
 881         info->port.xmit_buf = (unsigned char *) page;
 882
 883         /*
 884          * Clear the FIFO buffers and disable them
 885          * (they will be reenabled in mxser_change_speed())
 886          */
 887         if (info->board->chip_flag)
 888                 outb((UART_FCR_CLEAR_RCVR |
 889                         UART_FCR_CLEAR_XMIT |
 890                         MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 891         else
 892                 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 893                         info->ioaddr + UART_FCR);
 894
 895         /*
 896          * At this point there's no way the LSR could still be 0xFF;
 897          * if it is, then bail out, because there's likely no UART
 898          * here.
 899          */
 900         if (inb(info->ioaddr + UART_LSR) == 0xff) {
 901                 spin_unlock_irqrestore(&info->slock, flags);
 902                 if (capable(CAP_SYS_ADMIN)) {
 903                         set_bit(TTY_IO_ERROR, &tty->flags);
 904                         return 0;
 905                 } else
 906                         return -ENODEV;
 907         }
 908
 909         /*
 910          * Clear the interrupt registers.
 911          */
 912         (void) inb(info->ioaddr + UART_LSR);
 913         (void) inb(info->ioaddr + UART_RX);
 914         (void) inb(info->ioaddr + UART_IIR);
 915         (void) inb(info->ioaddr + UART_MSR);
 916
 917         /*
 918          * Now, initialize the UART
 919          */
 920         outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 921         info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 922         outb(info->MCR, info->ioaddr + UART_MCR);
 923
 924         /*
 925          * Finally, enable interrupts
 926          */
 927         info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 928
 929         if (info->board->chip_flag)
 930                 info->IER |= MOXA_MUST_IER_EGDAI;
 931         outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 932
 933         /*
 934          * And clear the interrupt registers again for luck.
 935          */
 936         (void) inb(info->ioaddr + UART_LSR);
 937         (void) inb(info->ioaddr + UART_RX);
 938         (void) inb(info->ioaddr + UART_IIR);
 939         (void) inb(info->ioaddr + UART_MSR);
 940
 941         clear_bit(TTY_IO_ERROR, &tty->flags);
 942         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 943
 944         /*
 945          * and set the speed of the serial port
 946          */
 947         mxser_change_speed(tty, NULL);
 948         spin_unlock_irqrestore(&info->slock, flags);
 949
 950         return 0;
 951 }
 952
 953 /*
 954  * This routine will shutdown a serial port
 955  */
 956 static void mxser_shutdown_port(struct tty_port *port)
 957 {
 958         struct mxser_port *info = container_of(port, struct mxser_port, port);
 959         unsigned long flags;
 960
 961         spin_lock_irqsave(&info->slock, flags);
 962
 963         /*
 964          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 965          * here so the queue might never be waken up
 966          */
 967         wake_up_interruptible(&info->port.delta_msr_wait);
 968
 969         /*
 970          * Free the xmit buffer, if necessary
 971          */
 972         if (info->port.xmit_buf) {
 973                 free_page((unsigned long) info->port.xmit_buf);
 974                 info->port.xmit_buf = NULL;
 975         }
 976
 977         info->IER = 0;
 978         outb(0x00, info->ioaddr + UART_IER);
 979
 980         /* clear Rx/Tx FIFO's */
 981         if (info->board->chip_flag)
 982                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 983                                 MOXA_MUST_FCR_GDA_MODE_ENABLE,
 984                                 info->ioaddr + UART_FCR);
 985         else
 986                 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 987                         info->ioaddr + UART_FCR);
 988
 989         /* read data port to reset things */
 990         (void) inb(info->ioaddr + UART_RX);
 991
 992
 993         if (info->board->chip_flag)
 994                 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 995
 996         spin_unlock_irqrestore(&info->slock, flags);
 997 }
 998
 999 /*
1000  * This routine is called whenever a serial port is opened.  It
1001  * enables interrupts for a serial port, linking in its async structure into
1002  * the IRQ chain.   It also performs the serial-specific
1003  * initialization for the tty structure.
1004  */
1005 static int mxser_open(struct tty_struct *tty, struct file *filp)
1006 {
1007         struct mxser_port *info;
1008         int line;
1009
1010         line = tty->index;
1011         if (line == MXSER_PORTS)
1012                 return 0;
1013         info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1014         if (!info->ioaddr)
1015                 return -ENODEV;
1016
1017         tty->driver_data = info;
1018         return tty_port_open(&info->port, tty, filp);
1019 }
1020
1021 static void mxser_flush_buffer(struct tty_struct *tty)
1022 {
1023         struct mxser_port *info = tty->driver_data;
1024         char fcr;
1025         unsigned long flags;
1026
1027
1028         spin_lock_irqsave(&info->slock, flags);
1029         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1030
1031         fcr = inb(info->ioaddr + UART_FCR);
1032         outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1033                 info->ioaddr + UART_FCR);
1034         outb(fcr, info->ioaddr + UART_FCR);
1035
1036         spin_unlock_irqrestore(&info->slock, flags);
1037
1038         tty_wakeup(tty);
1039 }
1040
1041
1042 static void mxser_close_port(struct tty_port *port)
1043 {
1044         struct mxser_port *info = container_of(port, struct mxser_port, port);
1045         unsigned long timeout;
1046         /*
1047          * At this point we stop accepting input.  To do this, we
1048          * disable the receive line status interrupts, and tell the
1049          * interrupt driver to stop checking the data ready bit in the
1050          * line status register.
1051          */
1052         info->IER &= ~UART_IER_RLSI;
1053         if (info->board->chip_flag)
1054                 info->IER &= ~MOXA_MUST_RECV_ISR;
1055
1056         outb(info->IER, info->ioaddr + UART_IER);
1057         /*
1058          * Before we drop DTR, make sure the UART transmitter
1059          * has completely drained; this is especially
1060          * important if there is a transmit FIFO!
1061          */
1062         timeout = jiffies + HZ;
1063         while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1064                 schedule_timeout_interruptible(5);
1065                 if (time_after(jiffies, timeout))
1066                         break;
1067         }
1068 }
1069
1070 /*
1071  * This routine is called when the serial port gets closed.  First, we
1072  * wait for the last remaining data to be sent.  Then, we unlink its
1073  * async structure from the interrupt chain if necessary, and we free
1074  * that IRQ if nothing is left in the chain.
1075  */
1076 static void mxser_close(struct tty_struct *tty, struct file *filp)
1077 {
1078         struct mxser_port *info = tty->driver_data;
1079         struct tty_port *port = &info->port;
1080
1081         if (tty->index == MXSER_PORTS || info == NULL)
1082                 return;
1083         if (tty_port_close_start(port, tty, filp) == 0)
1084                 return;
1085         mutex_lock(&port->mutex);
1086         mxser_close_port(port);
1087         mxser_flush_buffer(tty);
1088         mxser_shutdown_port(port);
1089         clear_bit(ASYNCB_INITIALIZED, &port->flags);
1090         mutex_unlock(&port->mutex);
1091         /* Right now the tty_port set is done outside of the close_end helper
1092            as we don't yet have everyone using refcounts */
1093         tty_port_close_end(port, tty);
1094         tty_port_tty_set(port, NULL);
1095 }
1096
1097 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1098 {
1099         int c, total = 0;
1100         struct mxser_port *info = tty->driver_data;
1101         unsigned long flags;
1102
1103         if (!info->port.xmit_buf)
1104                 return 0;
1105
1106         while (1) {
1107                 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1108                                           SERIAL_XMIT_SIZE - info->xmit_head));
1109                 if (c <= 0)
1110                         break;
1111
1112                 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1113                 spin_lock_irqsave(&info->slock, flags);
1114                 info->xmit_head = (info->xmit_head + c) &
1115                                   (SERIAL_XMIT_SIZE - 1);
1116                 info->xmit_cnt += c;
1117                 spin_unlock_irqrestore(&info->slock, flags);
1118
1119                 buf += c;
1120                 count -= c;
1121                 total += c;
1122         }
1123
1124         if (info->xmit_cnt && !tty->stopped) {
1125                 if (!tty->hw_stopped ||
1126                                 (info->type == PORT_16550A) ||
1127                                 (info->board->chip_flag)) {
1128                         spin_lock_irqsave(&info->slock, flags);
1129                         outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1130                                         UART_IER);
1131                         info->IER |= UART_IER_THRI;
1132                         outb(info->IER, info->ioaddr + UART_IER);
1133                         spin_unlock_irqrestore(&info->slock, flags);
1134                 }
1135         }
1136         return total;
1137 }
1138
1139 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1140 {
1141         struct mxser_port *info = tty->driver_data;
1142         unsigned long flags;
1143
1144         if (!info->port.xmit_buf)
1145                 return 0;
1146
1147         if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1148                 return 0;
1149
1150         spin_lock_irqsave(&info->slock, flags);
1151         info->port.xmit_buf[info->xmit_head++] = ch;
1152         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1153         info->xmit_cnt++;
1154         spin_unlock_irqrestore(&info->slock, flags);
1155         if (!tty->stopped) {
1156                 if (!tty->hw_stopped ||
1157                                 (info->type == PORT_16550A) ||
1158                                 info->board->chip_flag) {
1159                         spin_lock_irqsave(&info->slock, flags);
1160                         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1161                         info->IER |= UART_IER_THRI;
1162                         outb(info->IER, info->ioaddr + UART_IER);
1163                         spin_unlock_irqrestore(&info->slock, flags);
1164                 }
1165         }
1166         return 1;
1167 }
1168
1169
1170 static void mxser_flush_chars(struct tty_struct *tty)
1171 {
1172         struct mxser_port *info = tty->driver_data;
1173         unsigned long flags;
1174
1175         if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1176                         (tty->hw_stopped && info->type != PORT_16550A &&
1177                          !info->board->chip_flag))
1178                 return;
1179
1180         spin_lock_irqsave(&info->slock, flags);
1181
1182         outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1183         info->IER |= UART_IER_THRI;
1184         outb(info->IER, info->ioaddr + UART_IER);
1185
1186         spin_unlock_irqrestore(&info->slock, flags);
1187 }
1188
1189 static int mxser_write_room(struct tty_struct *tty)
1190 {
1191         struct mxser_port *info = tty->driver_data;
1192         int ret;
1193
1194         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1195         return ret < 0 ? 0 : ret;
1196 }
1197
1198 static int mxser_chars_in_buffer(struct tty_struct *tty)
1199 {
1200         struct mxser_port *info = tty->driver_data;
1201         return info->xmit_cnt;
1202 }
1203
1204 /*
1205  * ------------------------------------------------------------
1206  * friends of mxser_ioctl()
1207  * ------------------------------------------------------------
1208  */
1209 static int mxser_get_serial_info(struct tty_struct *tty,
1210                 struct serial_struct __user *retinfo)
1211 {
1212         struct mxser_port *info = tty->driver_data;
1213         struct serial_struct tmp = {
1214                 .type = info->type,
1215                 .line = tty->index,
1216                 .port = info->ioaddr,
1217                 .irq = info->board->irq,
1218                 .flags = info->port.flags,
1219                 .baud_base = info->baud_base,
1220                 .close_delay = info->port.close_delay,
1221                 .closing_wait = info->port.closing_wait,
1222                 .custom_divisor = info->custom_divisor,
1223                 .hub6 = 0
1224         };
1225         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1226                 return -EFAULT;
1227         return 0;
1228 }
1229
1230 static int mxser_set_serial_info(struct tty_struct *tty,
1231                 struct serial_struct __user *new_info)
1232 {
1233         struct mxser_port *info = tty->driver_data;
1234         struct tty_port *port = &info->port;
1235         struct serial_struct new_serial;
1236         speed_t baud;
1237         unsigned long sl_flags;
1238         unsigned int flags;
1239         int retval = 0;
1240
1241         if (!new_info || !info->ioaddr)
1242                 return -ENODEV;
1243         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1244                 return -EFAULT;
1245
1246         if (new_serial.irq != info->board->irq ||
1247                         new_serial.port != info->ioaddr)
1248                 return -EINVAL;
1249
1250         flags = port->flags & ASYNC_SPD_MASK;
1251
1252         if (!capable(CAP_SYS_ADMIN)) {
1253                 if ((new_serial.baud_base != info->baud_base) ||
1254                                 (new_serial.close_delay != info->port.close_delay) ||
1255                                 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1256                         return -EPERM;
1257                 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1258                                 (new_serial.flags & ASYNC_USR_MASK));
1259         } else {
1260                 /*
1261                  * OK, past this point, all the error checking has been done.
1262                  * At this point, we start making changes.....
1263                  */
1264                 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1265                                 (new_serial.flags & ASYNC_FLAGS));
1266                 port->close_delay = new_serial.close_delay * HZ / 100;
1267                 port->closing_wait = new_serial.closing_wait * HZ / 100;
1268                 tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1269                 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1270                                 (new_serial.baud_base != info->baud_base ||
1271                                 new_serial.custom_divisor !=
1272                                 info->custom_divisor)) {
1273                         if (new_serial.custom_divisor == 0)
1274                                 return -EINVAL;
1275                         baud = new_serial.baud_base / new_serial.custom_divisor;
1276                         tty_encode_baud_rate(tty, baud, baud);
1277                 }
1278         }
1279
1280         info->type = new_serial.type;
1281
1282         process_txrx_fifo(info);
1283
1284         if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1285                 if (flags != (port->flags & ASYNC_SPD_MASK)) {
1286                         spin_lock_irqsave(&info->slock, sl_flags);
1287                         mxser_change_speed(tty, NULL);
1288                         spin_unlock_irqrestore(&info->slock, sl_flags);
1289                 }
1290         } else {
1291                 retval = mxser_activate(port, tty);
1292                 if (retval == 0)
1293                         set_bit(ASYNCB_INITIALIZED, &port->flags);
1294         }
1295         return retval;
1296 }
1297
1298 /*
1299  * mxser_get_lsr_info - get line status register info
1300  *
1301  * Purpose: Let user call ioctl() to get info when the UART physically
1302  *          is emptied.  On bus types like RS485, the transmitter must
1303  *          release the bus after transmitting. This must be done when
1304  *          the transmit shift register is empty, not be done when the
1305  *          transmit holding register is empty.  This functionality
1306  *          allows an RS485 driver to be written in user space.
1307  */
1308 static int mxser_get_lsr_info(struct mxser_port *info,
1309                 unsigned int __user *value)
1310 {
1311         unsigned char status;
1312         unsigned int result;
1313         unsigned long flags;
1314
1315         spin_lock_irqsave(&info->slock, flags);
1316         status = inb(info->ioaddr + UART_LSR);
1317         spin_unlock_irqrestore(&info->slock, flags);
1318         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1319         return put_user(result, value);
1320 }
1321
1322 static int mxser_tiocmget(struct tty_struct *tty)
1323 {
1324         struct mxser_port *info = tty->driver_data;
1325         unsigned char control, status;
1326         unsigned long flags;
1327
1328
1329         if (tty->index == MXSER_PORTS)
1330                 return -ENOIOCTLCMD;
1331         if (test_bit(TTY_IO_ERROR, &tty->flags))
1332                 return -EIO;
1333
1334         control = info->MCR;
1335
1336         spin_lock_irqsave(&info->slock, flags);
1337         status = inb(info->ioaddr + UART_MSR);
1338         if (status & UART_MSR_ANY_DELTA)
1339                 mxser_check_modem_status(tty, info, status);
1340         spin_unlock_irqrestore(&info->slock, flags);
1341         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1342                     ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1343                     ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1344                     ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1345                     ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1346                     ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1347 }
1348
1349 static int mxser_tiocmset(struct tty_struct *tty,
1350                 unsigned int set, unsigned int clear)
1351 {
1352         struct mxser_port *info = tty->driver_data;
1353         unsigned long flags;
1354
1355
1356         if (tty->index == MXSER_PORTS)
1357                 return -ENOIOCTLCMD;
1358         if (test_bit(TTY_IO_ERROR, &tty->flags))
1359                 return -EIO;
1360
1361         spin_lock_irqsave(&info->slock, flags);
1362
1363         if (set & TIOCM_RTS)
1364                 info->MCR |= UART_MCR_RTS;
1365         if (set & TIOCM_DTR)
1366                 info->MCR |= UART_MCR_DTR;
1367
1368         if (clear & TIOCM_RTS)
1369                 info->MCR &= ~UART_MCR_RTS;
1370         if (clear & TIOCM_DTR)
1371                 info->MCR &= ~UART_MCR_DTR;
1372
1373         outb(info->MCR, info->ioaddr + UART_MCR);
1374         spin_unlock_irqrestore(&info->slock, flags);
1375         return 0;
1376 }
1377
1378 static int __init mxser_program_mode(int port)
1379 {
1380         int id, i, j, n;
1381
1382         outb(0, port);
1383         outb(0, port);
1384         outb(0, port);
1385         (void)inb(port);
1386         (void)inb(port);
1387         outb(0, port);
1388         (void)inb(port);
1389
1390         id = inb(port + 1) & 0x1F;
1391         if ((id != C168_ASIC_ID) &&
1392                         (id != C104_ASIC_ID) &&
1393                         (id != C102_ASIC_ID) &&
1394                         (id != CI132_ASIC_ID) &&
1395                         (id != CI134_ASIC_ID) &&
1396                         (id != CI104J_ASIC_ID))
1397                 return -1;
1398         for (i = 0, j = 0; i < 4; i++) {
1399                 n = inb(port + 2);
1400                 if (n == 'M') {
1401                         j = 1;
1402                 } else if ((j == 1) && (n == 1)) {
1403                         j = 2;
1404                         break;
1405                 } else
1406                         j = 0;
1407         }
1408         if (j != 2)
1409                 id = -2;
1410         return id;
1411 }
1412
1413 static void __init mxser_normal_mode(int port)
1414 {
1415         int i, n;
1416
1417         outb(0xA5, port + 1);
1418         outb(0x80, port + 3);
1419         outb(12, port + 0);     /* 9600 bps */
1420         outb(0, port + 1);
1421         outb(0x03, port + 3);   /* 8 data bits */
1422         outb(0x13, port + 4);   /* loop back mode */
1423         for (i = 0; i < 16; i++) {
1424                 n = inb(port + 5);
1425                 if ((n & 0x61) == 0x60)
1426                         break;
1427                 if ((n & 1) == 1)
1428                         (void)inb(port);
1429         }
1430         outb(0x00, port + 4);
1431 }
1432
1433 #define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1434 #define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1435 #define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1436 #define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1437 #define EN_CCMD         0x000   /* Chip's command register     */
1438 #define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1439 #define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1440 #define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1441 #define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1442 #define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1443 #define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1444 #define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1445 #define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1446 static int __init mxser_read_register(int port, unsigned short *regs)
1447 {
1448         int i, k, value, id;
1449         unsigned int j;
1450
1451         id = mxser_program_mode(port);
1452         if (id < 0)
1453                 return id;
1454         for (i = 0; i < 14; i++) {
1455                 k = (i & 0x3F) | 0x180;
1456                 for (j = 0x100; j > 0; j >>= 1) {
1457                         outb(CHIP_CS, port);
1458                         if (k & j) {
1459                                 outb(CHIP_CS | CHIP_DO, port);
1460                                 outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1461                         } else {
1462                                 outb(CHIP_CS, port);
1463                                 outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1464                         }
1465                 }
1466                 (void)inb(port);
1467                 value = 0;
1468                 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1469                         outb(CHIP_CS, port);
1470                         outb(CHIP_CS | CHIP_SK, port);
1471                         if (inb(port) & CHIP_DI)
1472                                 value |= j;
1473                 }
1474                 regs[i] = value;
1475                 outb(0, port);
1476         }
1477         mxser_normal_mode(port);
1478         return id;
1479 }
1480
1481 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 {
1483         struct mxser_port *ip;
1484         struct tty_port *port;
1485         struct tty_struct *tty;
1486         int result, status;
1487         unsigned int i, j;
1488         int ret = 0;
1489
1490         switch (cmd) {
1491         case MOXA_GET_MAJOR:
1492                 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1493                                         "%x (GET_MAJOR), fix your userspace\n",
1494                                         current->comm, cmd);
1495                 return put_user(ttymajor, (int __user *)argp);
1496
1497         case MOXA_CHKPORTENABLE:
1498                 result = 0;
1499                 for (i = 0; i < MXSER_BOARDS; i++)
1500                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1501                                 if (mxser_boards[i].ports[j].ioaddr)
1502                                         result |= (1 << i);
1503                 return put_user(result, (unsigned long __user *)argp);
1504         case MOXA_GETDATACOUNT:
1505                 /* The receive side is locked by port->slock but it isn't
1506                    clear that an exact snapshot is worth copying here */
1507                 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1508                         ret = -EFAULT;
1509                 return ret;
1510         case MOXA_GETMSTATUS: {
1511                 struct mxser_mstatus ms, __user *msu = argp;
1512                 for (i = 0; i < MXSER_BOARDS; i++)
1513                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1514                                 ip = &mxser_boards[i].ports[j];
1515                                 port = &ip->port;
1516                                 memset(&ms, 0, sizeof(ms));
1517
1518                                 mutex_lock(&port->mutex);
1519                                 if (!ip->ioaddr)
1520                                         goto copy;
1521
1522                                 tty = tty_port_tty_get(port);
1523
1524                                 if (!tty || !tty->termios)
1525                                         ms.cflag = ip->normal_termios.c_cflag;
1526                                 else
1527                                         ms.cflag = tty->termios->c_cflag;
1528                                 tty_kref_put(tty);
1529                                 spin_lock_irq(&ip->slock);
1530                                 status = inb(ip->ioaddr + UART_MSR);
1531                                 spin_unlock_irq(&ip->slock);
1532                                 if (status & UART_MSR_DCD)
1533                                         ms.dcd = 1;
1534                                 if (status & UART_MSR_DSR)
1535                                         ms.dsr = 1;
1536                                 if (status & UART_MSR_CTS)
1537                                         ms.cts = 1;
1538                         copy:
1539                                 mutex_unlock(&port->mutex);
1540                                 if (copy_to_user(msu, &ms, sizeof(ms)))
1541                                         return -EFAULT;
1542                                 msu++;
1543                         }
1544                 return 0;
1545         }
1546         case MOXA_ASPP_MON_EXT: {
1547                 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1548                 unsigned int cflag, iflag, p;
1549                 u8 opmode;
1550
1551                 me = kzalloc(sizeof(*me), GFP_KERNEL);
1552                 if (!me)
1553                         return -ENOMEM;
1554
1555                 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1556                         for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1557                                 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1558                                         i = MXSER_BOARDS;
1559                                         break;
1560                                 }
1561                                 ip = &mxser_boards[i].ports[j];
1562                                 port = &ip->port;
1563
1564                                 mutex_lock(&port->mutex);
1565                                 if (!ip->ioaddr) {
1566                                         mutex_unlock(&port->mutex);
1567                                         continue;
1568                                 }
1569
1570                                 spin_lock_irq(&ip->slock);
1571                                 status = mxser_get_msr(ip->ioaddr, 0, p);
1572
1573                                 if (status & UART_MSR_TERI)
1574                                         ip->icount.rng++;
1575                                 if (status & UART_MSR_DDSR)
1576                                         ip->icount.dsr++;
1577                                 if (status & UART_MSR_DDCD)
1578                                         ip->icount.dcd++;
1579                                 if (status & UART_MSR_DCTS)
1580                                         ip->icount.cts++;
1581
1582                                 ip->mon_data.modem_status = status;
1583                                 me->rx_cnt[p] = ip->mon_data.rxcnt;
1584                                 me->tx_cnt[p] = ip->mon_data.txcnt;
1585                                 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1586                                 me->up_txcnt[p] = ip->mon_data.up_txcnt;
1587                                 me->modem_status[p] =
1588                                         ip->mon_data.modem_status;
1589                                 spin_unlock_irq(&ip->slock);
1590
1591                                 tty = tty_port_tty_get(&ip->port);
1592
1593                                 if (!tty || !tty->termios) {
1594                                         cflag = ip->normal_termios.c_cflag;
1595                                         iflag = ip->normal_termios.c_iflag;
1596                                         me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1597                                 } else {
1598                                         cflag = tty->termios->c_cflag;
1599                                         iflag = tty->termios->c_iflag;
1600                                         me->baudrate[p] = tty_get_baud_rate(tty);
1601                                 }
1602                                 tty_kref_put(tty);
1603
1604                                 me->databits[p] = cflag & CSIZE;
1605                                 me->stopbits[p] = cflag & CSTOPB;
1606                                 me->parity[p] = cflag & (PARENB | PARODD |
1607                                                 CMSPAR);
1608
1609                                 if (cflag & CRTSCTS)
1610                                         me->flowctrl[p] |= 0x03;
1611
1612                                 if (iflag & (IXON | IXOFF))
1613                                         me->flowctrl[p] |= 0x0C;
1614
1615                                 if (ip->type == PORT_16550A)
1616                                         me->fifo[p] = 1;
1617
1618                                 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1619                                 opmode &= OP_MODE_MASK;
1620                                 me->iftype[p] = opmode;
1621                                 mutex_unlock(&port->mutex);
1622                         }
1623                 }
1624                 if (copy_to_user(argp, me, sizeof(*me)))
1625                         ret = -EFAULT;
1626                 kfree(me);
1627                 return ret;
1628         }
1629         default:
1630                 return -ENOIOCTLCMD;
1631         }
1632         return 0;
1633 }
1634
1635 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1636                 struct async_icount *cprev)
1637 {
1638         struct async_icount cnow;
1639         unsigned long flags;
1640         int ret;
1641
1642         spin_lock_irqsave(&info->slock, flags);
1643         cnow = info->icount;    /* atomic copy */
1644         spin_unlock_irqrestore(&info->slock, flags);
1645
1646         ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1647                 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1648                 ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1649                 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1650
1651         *cprev = cnow;
1652
1653         return ret;
1654 }
1655
1656 static int mxser_ioctl(struct tty_struct *tty,
1657                 unsigned int cmd, unsigned long arg)
1658 {
1659         struct mxser_port *info = tty->driver_data;
1660         struct tty_port *port = &info->port;
1661         struct async_icount cnow;
1662         unsigned long flags;
1663         void __user *argp = (void __user *)arg;
1664         int retval;
1665
1666         if (tty->index == MXSER_PORTS)
1667                 return mxser_ioctl_special(cmd, argp);
1668
1669         if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1670                 int p;
1671                 unsigned long opmode;
1672                 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1673                 int shiftbit;
1674                 unsigned char val, mask;
1675
1676                 p = tty->index % 4;
1677                 if (cmd == MOXA_SET_OP_MODE) {
1678                         if (get_user(opmode, (int __user *) argp))
1679                                 return -EFAULT;
1680                         if (opmode != RS232_MODE &&
1681                                         opmode != RS485_2WIRE_MODE &&
1682                                         opmode != RS422_MODE &&
1683                                         opmode != RS485_4WIRE_MODE)
1684                                 return -EFAULT;
1685                         mask = ModeMask[p];
1686                         shiftbit = p * 2;
1687                         spin_lock_irq(&info->slock);
1688                         val = inb(info->opmode_ioaddr);
1689                         val &= mask;
1690                         val |= (opmode << shiftbit);
1691                         outb(val, info->opmode_ioaddr);
1692                         spin_unlock_irq(&info->slock);
1693                 } else {
1694                         shiftbit = p * 2;
1695                         spin_lock_irq(&info->slock);
1696                         opmode = inb(info->opmode_ioaddr) >> shiftbit;
1697                         spin_unlock_irq(&info->slock);
1698                         opmode &= OP_MODE_MASK;
1699                         if (put_user(opmode, (int __user *)argp))
1700                                 return -EFAULT;
1701                 }
1702                 return 0;
1703         }
1704
1705         if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1706                         test_bit(TTY_IO_ERROR, &tty->flags))
1707                 return -EIO;
1708
1709         switch (cmd) {
1710         case TIOCGSERIAL:
1711                 mutex_lock(&port->mutex);
1712                 retval = mxser_get_serial_info(tty, argp);
1713                 mutex_unlock(&port->mutex);
1714                 return retval;
1715         case TIOCSSERIAL:
1716                 mutex_lock(&port->mutex);
1717                 retval = mxser_set_serial_info(tty, argp);
1718                 mutex_unlock(&port->mutex);
1719                 return retval;
1720         case TIOCSERGETLSR:     /* Get line status register */
1721                 return  mxser_get_lsr_info(info, argp);
1722                 /*
1723                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1724                  * - mask passed in arg for lines of interest
1725                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1726                  * Caller should use TIOCGICOUNT to see which one it was
1727                  */
1728         case TIOCMIWAIT:
1729                 spin_lock_irqsave(&info->slock, flags);
1730                 cnow = info->icount;    /* note the counters on entry */
1731                 spin_unlock_irqrestore(&info->slock, flags);
1732
1733                 return wait_event_interruptible(info->port.delta_msr_wait,
1734                                 mxser_cflags_changed(info, arg, &cnow));
1735         case MOXA_HighSpeedOn:
1736                 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1737         case MOXA_SDS_RSTICOUNTER:
1738                 spin_lock_irq(&info->slock);
1739                 info->mon_data.rxcnt = 0;
1740                 info->mon_data.txcnt = 0;
1741                 spin_unlock_irq(&info->slock);
1742                 return 0;
1743
1744         case MOXA_ASPP_OQUEUE:{
1745                 int len, lsr;
1746
1747                 len = mxser_chars_in_buffer(tty);
1748                 spin_lock_irq(&info->slock);
1749                 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1750                 spin_unlock_irq(&info->slock);
1751                 len += (lsr ? 0 : 1);
1752
1753                 return put_user(len, (int __user *)argp);
1754         }
1755         case MOXA_ASPP_MON: {
1756                 int mcr, status;
1757
1758                 spin_lock_irq(&info->slock);
1759                 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1760                 mxser_check_modem_status(tty, info, status);
1761
1762                 mcr = inb(info->ioaddr + UART_MCR);
1763                 spin_unlock_irq(&info->slock);
1764
1765                 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1766                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1767                 else
1768                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1769
1770                 if (mcr & MOXA_MUST_MCR_TX_XON)
1771                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1772                 else
1773                         info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1774
1775                 if (tty->hw_stopped)
1776                         info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1777                 else
1778                         info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1779
1780                 if (copy_to_user(argp, &info->mon_data,
1781                                 sizeof(struct mxser_mon)))
1782                         return -EFAULT;
1783
1784                 return 0;
1785         }
1786         case MOXA_ASPP_LSTATUS: {
1787                 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1788                         return -EFAULT;
1789
1790                 info->err_shadow = 0;
1791                 return 0;
1792         }
1793         case MOXA_SET_BAUD_METHOD: {
1794                 int method;
1795
1796                 if (get_user(method, (int __user *)argp))
1797                         return -EFAULT;
1798                 mxser_set_baud_method[tty->index] = method;
1799                 return put_user(method, (int __user *)argp);
1800         }
1801         default:
1802                 return -ENOIOCTLCMD;
1803         }
1804         return 0;
1805 }
1806
1807         /*
1808          * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1809          * Return: write counters to the user passed counter struct
1810          * NB: both 1->0 and 0->1 transitions are counted except for
1811          *     RI where only 0->1 is counted.
1812          */
1813
1814 static int mxser_get_icount(struct tty_struct *tty,
1815                 struct serial_icounter_struct *icount)
1816
1817 {
1818         struct mxser_port *info = tty->driver_data;
1819         struct async_icount cnow;
1820         unsigned long flags;
1821
1822         spin_lock_irqsave(&info->slock, flags);
1823         cnow = info->icount;
1824         spin_unlock_irqrestore(&info->slock, flags);
1825
1826         icount->frame = cnow.frame;
1827         icount->brk = cnow.brk;
1828         icount->overrun = cnow.overrun;
1829         icount->buf_overrun = cnow.buf_overrun;
1830         icount->parity = cnow.parity;
1831         icount->rx = cnow.rx;
1832         icount->tx = cnow.tx;
1833         icount->cts = cnow.cts;
1834         icount->dsr = cnow.dsr;
1835         icount->rng = cnow.rng;
1836         icount->dcd = cnow.dcd;
1837         return 0;
1838 }
1839
1840 static void mxser_stoprx(struct tty_struct *tty)
1841 {
1842         struct mxser_port *info = tty->driver_data;
1843
1844         info->ldisc_stop_rx = 1;
1845         if (I_IXOFF(tty)) {
1846                 if (info->board->chip_flag) {
1847                         info->IER &= ~MOXA_MUST_RECV_ISR;
1848                         outb(info->IER, info->ioaddr + UART_IER);
1849                 } else {
1850                         info->x_char = STOP_CHAR(tty);
1851                         outb(0, info->ioaddr + UART_IER);
1852                         info->IER |= UART_IER_THRI;
1853                         outb(info->IER, info->ioaddr + UART_IER);
1854                 }
1855         }
1856
1857         if (tty->termios->c_cflag & CRTSCTS) {
1858                 info->MCR &= ~UART_MCR_RTS;
1859                 outb(info->MCR, info->ioaddr + UART_MCR);
1860         }
1861 }
1862
1863 /*
1864  * This routine is called by the upper-layer tty layer to signal that
1865  * incoming characters should be throttled.
1866  */
1867 static void mxser_throttle(struct tty_struct *tty)
1868 {
1869         mxser_stoprx(tty);
1870 }
1871
1872 static void mxser_unthrottle(struct tty_struct *tty)
1873 {
1874         struct mxser_port *info = tty->driver_data;
1875
1876         /* startrx */
1877         info->ldisc_stop_rx = 0;
1878         if (I_IXOFF(tty)) {
1879                 if (info->x_char)
1880                         info->x_char = 0;
1881                 else {
1882                         if (info->board->chip_flag) {
1883                                 info->IER |= MOXA_MUST_RECV_ISR;
1884                                 outb(info->IER, info->ioaddr + UART_IER);
1885                         } else {
1886                                 info->x_char = START_CHAR(tty);
1887                                 outb(0, info->ioaddr + UART_IER);
1888                                 info->IER |= UART_IER_THRI;
1889                                 outb(info->IER, info->ioaddr + UART_IER);
1890                         }
1891                 }
1892         }
1893
1894         if (tty->termios->c_cflag & CRTSCTS) {
1895                 info->MCR |= UART_MCR_RTS;
1896                 outb(info->MCR, info->ioaddr + UART_MCR);
1897         }
1898 }
1899
1900 /*
1901  * mxser_stop() and mxser_start()
1902  *
1903  * This routines are called before setting or resetting tty->stopped.
1904  * They enable or disable transmitter interrupts, as necessary.
1905  */
1906 static void mxser_stop(struct tty_struct *tty)
1907 {
1908         struct mxser_port *info = tty->driver_data;
1909         unsigned long flags;
1910
1911         spin_lock_irqsave(&info->slock, flags);
1912         if (info->IER & UART_IER_THRI) {
1913                 info->IER &= ~UART_IER_THRI;
1914                 outb(info->IER, info->ioaddr + UART_IER);
1915         }
1916         spin_unlock_irqrestore(&info->slock, flags);
1917 }
1918
1919 static void mxser_start(struct tty_struct *tty)
1920 {
1921         struct mxser_port *info = tty->driver_data;
1922         unsigned long flags;
1923
1924         spin_lock_irqsave(&info->slock, flags);
1925         if (info->xmit_cnt && info->port.xmit_buf) {
1926                 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1927                 info->IER |= UART_IER_THRI;
1928                 outb(info->IER, info->ioaddr + UART_IER);
1929         }
1930         spin_unlock_irqrestore(&info->slock, flags);
1931 }
1932
1933 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1934 {
1935         struct mxser_port *info = tty->driver_data;
1936         unsigned long flags;
1937
1938         spin_lock_irqsave(&info->slock, flags);
1939         mxser_change_speed(tty, old_termios);
1940         spin_unlock_irqrestore(&info->slock, flags);
1941
1942         if ((old_termios->c_cflag & CRTSCTS) &&
1943                         !(tty->termios->c_cflag & CRTSCTS)) {
1944                 tty->hw_stopped = 0;
1945                 mxser_start(tty);
1946         }
1947
1948         /* Handle sw stopped */
1949         if ((old_termios->c_iflag & IXON) &&
1950                         !(tty->termios->c_iflag & IXON)) {
1951                 tty->stopped = 0;
1952
1953                 if (info->board->chip_flag) {
1954                         spin_lock_irqsave(&info->slock, flags);
1955                         mxser_disable_must_rx_software_flow_control(
1956                                         info->ioaddr);
1957                         spin_unlock_irqrestore(&info->slock, flags);
1958                 }
1959
1960                 mxser_start(tty);
1961         }
1962 }
1963
1964 /*
1965  * mxser_wait_until_sent() --- wait until the transmitter is empty
1966  */
1967 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1968 {
1969         struct mxser_port *info = tty->driver_data;
1970         unsigned long orig_jiffies, char_time;
1971         unsigned long flags;
1972         int lsr;
1973
1974         if (info->type == PORT_UNKNOWN)
1975                 return;
1976
1977         if (info->xmit_fifo_size == 0)
1978                 return;         /* Just in case.... */
1979
1980         orig_jiffies = jiffies;
1981         /*
1982          * Set the check interval to be 1/5 of the estimated time to
1983          * send a single character, and make it at least 1.  The check
1984          * interval should also be less than the timeout.
1985          *
1986          * Note: we have to use pretty tight timings here to satisfy
1987          * the NIST-PCTS.
1988          */
1989         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1990         char_time = char_time / 5;
1991         if (char_time == 0)
1992                 char_time = 1;
1993         if (timeout && timeout < char_time)
1994                 char_time = timeout;
1995         /*
1996          * If the transmitter hasn't cleared in twice the approximate
1997          * amount of time to send the entire FIFO, it probably won't
1998          * ever clear.  This assumes the UART isn't doing flow
1999          * control, which is currently the case.  Hence, if it ever
2000          * takes longer than info->timeout, this is probably due to a
2001          * UART bug of some kind.  So, we clamp the timeout parameter at
2002          * 2*info->timeout.
2003          */
2004         if (!timeout || timeout > 2 * info->timeout)
2005                 timeout = 2 * info->timeout;
2006
2007         spin_lock_irqsave(&info->slock, flags);
2008         while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2009                 spin_unlock_irqrestore(&info->slock, flags);
2010                 schedule_timeout_interruptible(char_time);
2011                 spin_lock_irqsave(&info->slock, flags);
2012                 if (signal_pending(current))
2013                         break;
2014                 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2015                         break;
2016         }
2017         spin_unlock_irqrestore(&info->slock, flags);
2018         set_current_state(TASK_RUNNING);
2019 }
2020
2021 /*
2022  * This routine is called by tty_hangup() when a hangup is signaled.
2023  */
2024 static void mxser_hangup(struct tty_struct *tty)
2025 {
2026         struct mxser_port *info = tty->driver_data;
2027
2028         mxser_flush_buffer(tty);
2029         tty_port_hangup(&info->port);
2030 }
2031
2032 /*
2033  * mxser_rs_break() --- routine which turns the break handling on or off
2034  */
2035 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2036 {
2037         struct mxser_port *info = tty->driver_data;
2038         unsigned long flags;
2039
2040         spin_lock_irqsave(&info->slock, flags);
2041         if (break_state == -1)
2042                 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2043                         info->ioaddr + UART_LCR);
2044         else
2045                 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2046                         info->ioaddr + UART_LCR);
2047         spin_unlock_irqrestore(&info->slock, flags);
2048         return 0;
2049 }
2050
2051 static void mxser_receive_chars(struct tty_struct *tty,
2052                                 struct mxser_port *port, int *status)
2053 {
2054         unsigned char ch, gdl;
2055         int ignored = 0;
2056         int cnt = 0;
2057         int recv_room;
2058         int max = 256;
2059
2060         recv_room = tty->receive_room;
2061         if (recv_room == 0 && !port->ldisc_stop_rx)
2062                 mxser_stoprx(tty);
2063         if (port->board->chip_flag != MOXA_OTHER_UART) {
2064
2065                 if (*status & UART_LSR_SPECIAL)
2066                         goto intr_old;
2067                 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2068                                 (*status & MOXA_MUST_LSR_RERR))
2069                         goto intr_old;
2070                 if (*status & MOXA_MUST_LSR_RERR)
2071                         goto intr_old;
2072
2073                 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2074
2075                 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2076                         gdl &= MOXA_MUST_GDL_MASK;
2077                 if (gdl >= recv_room) {
2078                         if (!port->ldisc_stop_rx)
2079                                 mxser_stoprx(tty);
2080                 }
2081                 while (gdl--) {
2082                         ch = inb(port->ioaddr + UART_RX);
2083                         tty_insert_flip_char(tty, ch, 0);
2084                         cnt++;
2085                 }
2086                 goto end_intr;
2087         }
2088 intr_old:
2089
2090         do {
2091                 if (max-- < 0)
2092                         break;
2093
2094                 ch = inb(port->ioaddr + UART_RX);
2095                 if (port->board->chip_flag && (*status & UART_LSR_OE))
2096                         outb(0x23, port->ioaddr + UART_FCR);
2097                 *status &= port->read_status_mask;
2098                 if (*status & port->ignore_status_mask) {
2099                         if (++ignored > 100)
2100                                 break;
2101                 } else {
2102                         char flag = 0;
2103                         if (*status & UART_LSR_SPECIAL) {
2104                                 if (*status & UART_LSR_BI) {
2105                                         flag = TTY_BREAK;
2106                                         port->icount.brk++;
2107
2108                                         if (port->port.flags & ASYNC_SAK)
2109                                                 do_SAK(tty);
2110                                 } else if (*status & UART_LSR_PE) {
2111                                         flag = TTY_PARITY;
2112                                         port->icount.parity++;
2113                                 } else if (*status & UART_LSR_FE) {
2114                                         flag = TTY_FRAME;
2115                                         port->icount.frame++;
2116                                 } else if (*status & UART_LSR_OE) {
2117                                         flag = TTY_OVERRUN;
2118                                         port->icount.overrun++;
2119                                 } else
2120                                         flag = TTY_BREAK;
2121                         }
2122                         tty_insert_flip_char(tty, ch, flag);
2123                         cnt++;
2124                         if (cnt >= recv_room) {
2125                                 if (!port->ldisc_stop_rx)
2126                                         mxser_stoprx(tty);
2127                                 break;
2128                         }
2129
2130                 }
2131
2132                 if (port->board->chip_flag)
2133                         break;
2134
2135                 *status = inb(port->ioaddr + UART_LSR);
2136         } while (*status & UART_LSR_DR);
2137
2138 end_intr:
2139         mxvar_log.rxcnt[tty->index] += cnt;
2140         port->mon_data.rxcnt += cnt;
2141         port->mon_data.up_rxcnt += cnt;
2142
2143         /*
2144          * We are called from an interrupt context with &port->slock
2145          * being held. Drop it temporarily in order to prevent
2146          * recursive locking.
2147          */
2148         spin_unlock(&port->slock);
2149         tty_flip_buffer_push(tty);
2150         spin_lock(&port->slock);
2151 }
2152
2153 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2154 {
2155         int count, cnt;
2156
2157         if (port->x_char) {
2158                 outb(port->x_char, port->ioaddr + UART_TX);
2159                 port->x_char = 0;
2160                 mxvar_log.txcnt[tty->index]++;
2161                 port->mon_data.txcnt++;
2162                 port->mon_data.up_txcnt++;
2163                 port->icount.tx++;
2164                 return;
2165         }
2166
2167         if (port->port.xmit_buf == NULL)
2168                 return;
2169
2170         if (port->xmit_cnt <= 0 || tty->stopped ||
2171                         (tty->hw_stopped &&
2172                         (port->type != PORT_16550A) &&
2173                         (!port->board->chip_flag))) {
2174                 port->IER &= ~UART_IER_THRI;
2175                 outb(port->IER, port->ioaddr + UART_IER);
2176                 return;
2177         }
2178
2179         cnt = port->xmit_cnt;
2180         count = port->xmit_fifo_size;
2181         do {
2182                 outb(port->port.xmit_buf[port->xmit_tail++],
2183                         port->ioaddr + UART_TX);
2184                 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2185                 if (--port->xmit_cnt <= 0)
2186                         break;
2187         } while (--count > 0);
2188         mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2189
2190         port->mon_data.txcnt += (cnt - port->xmit_cnt);
2191         port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2192         port->icount.tx += (cnt - port->xmit_cnt);
2193
2194         if (port->xmit_cnt < WAKEUP_CHARS)
2195                 tty_wakeup(tty);
2196
2197         if (port->xmit_cnt <= 0) {
2198                 port->IER &= ~UART_IER_THRI;
2199                 outb(port->IER, port->ioaddr + UART_IER);
2200         }
2201 }
2202
2203 /*
2204  * This is the serial driver's generic interrupt routine
2205  */
2206 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2207 {
2208         int status, iir, i;
2209         struct mxser_board *brd = NULL;
2210         struct mxser_port *port;
2211         int max, irqbits, bits, msr;
2212         unsigned int int_cnt, pass_counter = 0;
2213         int handled = IRQ_NONE;
2214         struct tty_struct *tty;
2215
2216         for (i = 0; i < MXSER_BOARDS; i++)
2217                 if (dev_id == &mxser_boards[i]) {
2218                         brd = dev_id;
2219                         break;
2220                 }
2221
2222         if (i == MXSER_BOARDS)
2223                 goto irq_stop;
2224         if (brd == NULL)
2225                 goto irq_stop;
2226         max = brd->info->nports;
2227         while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2228                 irqbits = inb(brd->vector) & brd->vector_mask;
2229                 if (irqbits == brd->vector_mask)
2230                         break;
2231
2232                 handled = IRQ_HANDLED;
2233                 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2234                         if (irqbits == brd->vector_mask)
2235                                 break;
2236                         if (bits & irqbits)
2237                                 continue;
2238                         port = &brd->ports[i];
2239
2240                         int_cnt = 0;
2241                         spin_lock(&port->slock);
2242                         do {
2243                                 iir = inb(port->ioaddr + UART_IIR);
2244                                 if (iir & UART_IIR_NO_INT)
2245                                         break;
2246                                 iir &= MOXA_MUST_IIR_MASK;
2247                                 tty = tty_port_tty_get(&port->port);
2248                                 if (!tty ||
2249                                                 (port->port.flags & ASYNC_CLOSING) ||
2250                                                 !(port->port.flags &
2251                                                         ASYNC_INITIALIZED)) {
2252                                         status = inb(port->ioaddr + UART_LSR);
2253                                         outb(0x27, port->ioaddr + UART_FCR);
2254                                         inb(port->ioaddr + UART_MSR);
2255                                         tty_kref_put(tty);
2256                                         break;
2257                                 }
2258
2259                                 status = inb(port->ioaddr + UART_LSR);
2260
2261                                 if (status & UART_LSR_PE)
2262                                         port->err_shadow |= NPPI_NOTIFY_PARITY;
2263                                 if (status & UART_LSR_FE)
2264                                         port->err_shadow |= NPPI_NOTIFY_FRAMING;
2265                                 if (status & UART_LSR_OE)
2266                                         port->err_shadow |=
2267                                                 NPPI_NOTIFY_HW_OVERRUN;
2268                                 if (status & UART_LSR_BI)
2269                                         port->err_shadow |= NPPI_NOTIFY_BREAK;
2270
2271                                 if (port->board->chip_flag) {
2272                                         if (iir == MOXA_MUST_IIR_GDA ||
2273                                             iir == MOXA_MUST_IIR_RDA ||
2274                                             iir == MOXA_MUST_IIR_RTO ||
2275                                             iir == MOXA_MUST_IIR_LSR)
2276                                                 mxser_receive_chars(tty, port,
2277                                                                 &status);
2278
2279                                 } else {
2280                                         status &= port->read_status_mask;
2281                                         if (status & UART_LSR_DR)
2282                                                 mxser_receive_chars(tty, port,
2283                                                                 &status);
2284                                 }
2285                                 msr = inb(port->ioaddr + UART_MSR);
2286                                 if (msr & UART_MSR_ANY_DELTA)
2287                                         mxser_check_modem_status(tty, port, msr);
2288
2289                                 if (port->board->chip_flag) {
2290                                         if (iir == 0x02 && (status &
2291                                                                 UART_LSR_THRE))
2292                                                 mxser_transmit_chars(tty, port);
2293                                 } else {
2294                                         if (status & UART_LSR_THRE)
2295                                                 mxser_transmit_chars(tty, port);
2296                                 }
2297                                 tty_kref_put(tty);
2298                         } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2299                         spin_unlock(&port->slock);
2300                 }
2301         }
2302
2303 irq_stop:
2304         return handled;
2305 }
2306
2307 static const struct tty_operations mxser_ops = {
2308         .open = mxser_open,
2309         .close = mxser_close,
2310         .write = mxser_write,
2311         .put_char = mxser_put_char,
2312         .flush_chars = mxser_flush_chars,
2313         .write_room = mxser_write_room,
2314         .chars_in_buffer = mxser_chars_in_buffer,
2315         .flush_buffer = mxser_flush_buffer,
2316         .ioctl = mxser_ioctl,
2317         .throttle = mxser_throttle,
2318         .unthrottle = mxser_unthrottle,
2319         .set_termios = mxser_set_termios,
2320         .stop = mxser_stop,
2321         .start = mxser_start,
2322         .hangup = mxser_hangup,
2323         .break_ctl = mxser_rs_break,
2324         .wait_until_sent = mxser_wait_until_sent,
2325         .tiocmget = mxser_tiocmget,
2326         .tiocmset = mxser_tiocmset,
2327         .get_icount = mxser_get_icount,
2328 };
2329
2330 struct tty_port_operations mxser_port_ops = {
2331         .carrier_raised = mxser_carrier_raised,
2332         .dtr_rts = mxser_dtr_rts,
2333         .activate = mxser_activate,
2334         .shutdown = mxser_shutdown_port,
2335 };
2336
2337 /*
2338  * The MOXA Smartio/Industio serial driver boot-time initialization code!
2339  */
2340
2341 static void mxser_release_ISA_res(struct mxser_board *brd)
2342 {
2343         free_irq(brd->irq, brd);
2344         release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2345         release_region(brd->vector, 1);
2346 }
2347
2348 static int __devinit mxser_initbrd(struct mxser_board *brd,
2349                 struct pci_dev *pdev)
2350 {
2351         struct mxser_port *info;
2352         unsigned int i;
2353         int retval;
2354
2355         printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2356                         brd->ports[0].max_baud);
2357
2358         for (i = 0; i < brd->info->nports; i++) {
2359                 info = &brd->ports[i];
2360                 tty_port_init(&info->port);
2361                 info->port.ops = &mxser_port_ops;
2362                 info->board = brd;
2363                 info->stop_rx = 0;
2364                 info->ldisc_stop_rx = 0;
2365
2366                 /* Enhance mode enabled here */
2367                 if (brd->chip_flag != MOXA_OTHER_UART)
2368                         mxser_enable_must_enchance_mode(info->ioaddr);
2369
2370                 info->port.flags = ASYNC_SHARE_IRQ;
2371                 info->type = brd->uart_type;
2372
2373                 process_txrx_fifo(info);
2374
2375                 info->custom_divisor = info->baud_base * 16;
2376                 info->port.close_delay = 5 * HZ / 10;
2377                 info->port.closing_wait = 30 * HZ;
2378                 info->normal_termios = mxvar_sdriver->init_termios;
2379                 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2380                 info->err_shadow = 0;
2381                 spin_lock_init(&info->slock);
2382
2383                 /* before set INT ISR, disable all int */
2384                 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2385                         info->ioaddr + UART_IER);
2386         }
2387
2388         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2389                         brd);
2390         if (retval)
2391                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2392                         "conflict with another device.\n",
2393                         brd->info->name, brd->irq);
2394
2395         return retval;
2396 }
2397
2398 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2399 {
2400         int id, i, bits;
2401         unsigned short regs[16], irq;
2402         unsigned char scratch, scratch2;
2403
2404         brd->chip_flag = MOXA_OTHER_UART;
2405
2406         id = mxser_read_register(cap, regs);
2407         switch (id) {
2408         case C168_ASIC_ID:
2409                 brd->info = &mxser_cards[0];
2410                 break;
2411         case C104_ASIC_ID:
2412                 brd->info = &mxser_cards[1];
2413                 break;
2414         case CI104J_ASIC_ID:
2415                 brd->info = &mxser_cards[2];
2416                 break;
2417         case C102_ASIC_ID:
2418                 brd->info = &mxser_cards[5];
2419                 break;
2420         case CI132_ASIC_ID:
2421                 brd->info = &mxser_cards[6];
2422                 break;
2423         case CI134_ASIC_ID:
2424                 brd->info = &mxser_cards[7];
2425                 break;
2426         default:
2427                 return 0;
2428         }
2429
2430         irq = 0;
2431         /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2432            Flag-hack checks if configuration should be read as 2-port here. */
2433         if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2434                 irq = regs[9] & 0xF000;
2435                 irq = irq | (irq >> 4);
2436                 if (irq != (regs[9] & 0xFF00))
2437                         goto err_irqconflict;
2438         } else if (brd->info->nports == 4) {
2439                 irq = regs[9] & 0xF000;
2440                 irq = irq | (irq >> 4);
2441                 irq = irq | (irq >> 8);
2442                 if (irq != regs[9])
2443                         goto err_irqconflict;
2444         } else if (brd->info->nports == 8) {
2445                 irq = regs[9] & 0xF000;
2446                 irq = irq | (irq >> 4);
2447                 irq = irq | (irq >> 8);
2448                 if ((irq != regs[9]) || (irq != regs[10]))
2449                         goto err_irqconflict;
2450         }
2451
2452         if (!irq) {
2453                 printk(KERN_ERR "mxser: interrupt number unset\n");
2454                 return -EIO;
2455         }
2456         brd->irq = ((int)(irq & 0xF000) >> 12);
2457         for (i = 0; i < 8; i++)
2458                 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2459         if ((regs[12] & 0x80) == 0) {
2460                 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2461                 return -EIO;
2462         }
2463         brd->vector = (int)regs[11];    /* interrupt vector */
2464         if (id == 1)
2465                 brd->vector_mask = 0x00FF;
2466         else
2467                 brd->vector_mask = 0x000F;
2468         for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2469                 if (regs[12] & bits) {
2470                         brd->ports[i].baud_base = 921600;
2471                         brd->ports[i].max_baud = 921600;
2472                 } else {
2473                         brd->ports[i].baud_base = 115200;
2474                         brd->ports[i].max_baud = 115200;
2475                 }
2476         }
2477         scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2478         outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2479         outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2480         outb(scratch2, cap + UART_LCR);
2481         outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2482         scratch = inb(cap + UART_IIR);
2483
2484         if (scratch & 0xC0)
2485                 brd->uart_type = PORT_16550A;
2486         else
2487                 brd->uart_type = PORT_16450;
2488         if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2489                         "mxser(IO)")) {
2490                 printk(KERN_ERR "mxser: can't request ports I/O region: "
2491                                 "0x%.8lx-0x%.8lx\n",
2492                                 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2493                                 8 * brd->info->nports - 1);
2494                 return -EIO;
2495         }
2496         if (!request_region(brd->vector, 1, "mxser(vector)")) {
2497                 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2498                 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2499                                 "0x%.8lx-0x%.8lx\n",
2500                                 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2501                                 8 * brd->info->nports - 1);
2502                 return -EIO;
2503         }
2504         return brd->info->nports;
2505
2506 err_irqconflict:
2507         printk(KERN_ERR "mxser: invalid interrupt number\n");
2508         return -EIO;
2509 }
2510
2511 static int __devinit mxser_probe(struct pci_dev *pdev,
2512                 const struct pci_device_id *ent)
2513 {
2514 #ifdef CONFIG_PCI
2515         struct mxser_board *brd;
2516         unsigned int i, j;
2517         unsigned long ioaddress;
2518         int retval = -EINVAL;
2519
2520         for (i = 0; i < MXSER_BOARDS; i++)
2521                 if (mxser_boards[i].info == NULL)
2522                         break;
2523
2524         if (i >= MXSER_BOARDS) {
2525                 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2526                                 "not configured\n", MXSER_BOARDS);
2527                 goto err;
2528         }
2529
2530         brd = &mxser_boards[i];
2531         brd->idx = i * MXSER_PORTS_PER_BOARD;
2532         dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2533                 mxser_cards[ent->driver_data].name,
2534                 pdev->bus->number, PCI_SLOT(pdev->devfn));
2535
2536         retval = pci_enable_device(pdev);
2537         if (retval) {
2538                 dev_err(&pdev->dev, "PCI enable failed\n");
2539                 goto err;
2540         }
2541
2542         /* io address */
2543         ioaddress = pci_resource_start(pdev, 2);
2544         retval = pci_request_region(pdev, 2, "mxser(IO)");
2545         if (retval)
2546                 goto err_dis;
2547
2548         brd->info = &mxser_cards[ent->driver_data];
2549         for (i = 0; i < brd->info->nports; i++)
2550                 brd->ports[i].ioaddr = ioaddress + 8 * i;
2551
2552         /* vector */
2553         ioaddress = pci_resource_start(pdev, 3);
2554         retval = pci_request_region(pdev, 3, "mxser(vector)");
2555         if (retval)
2556                 goto err_zero;
2557         brd->vector = ioaddress;
2558
2559         /* irq */
2560         brd->irq = pdev->irq;
2561
2562         brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2563         brd->uart_type = PORT_16550A;
2564         brd->vector_mask = 0;
2565
2566         for (i = 0; i < brd->info->nports; i++) {
2567                 for (j = 0; j < UART_INFO_NUM; j++) {
2568                         if (Gpci_uart_info[j].type == brd->chip_flag) {
2569                                 brd->ports[i].max_baud =
2570                                         Gpci_uart_info[j].max_baud;
2571
2572                                 /* exception....CP-102 */
2573                                 if (brd->info->flags & MXSER_HIGHBAUD)
2574                                         brd->ports[i].max_baud = 921600;
2575                                 break;
2576                         }
2577                 }
2578         }
2579
2580         if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2581                 for (i = 0; i < brd->info->nports; i++) {
2582                         if (i < 4)
2583                                 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2584                         else
2585                                 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2586                 }
2587                 outb(0, ioaddress + 4); /* default set to RS232 mode */
2588                 outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2589         }
2590
2591         for (i = 0; i < brd->info->nports; i++) {
2592                 brd->vector_mask |= (1 << i);
2593                 brd->ports[i].baud_base = 921600;
2594         }
2595
2596         /* mxser_initbrd will hook ISR. */
2597         retval = mxser_initbrd(brd, pdev);
2598         if (retval)
2599                 goto err_rel3;
2600
2601         for (i = 0; i < brd->info->nports; i++)
2602                 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2603
2604         pci_set_drvdata(pdev, brd);
2605
2606         return 0;
2607 err_rel3:
2608         pci_release_region(pdev, 3);
2609 err_zero:
2610         brd->info = NULL;
2611         pci_release_region(pdev, 2);
2612 err_dis:
2613         pci_disable_device(pdev);
2614 err:
2615         return retval;
2616 #else
2617         return -ENODEV;
2618 #endif
2619 }
2620
2621 static void __devexit mxser_remove(struct pci_dev *pdev)
2622 {
2623 #ifdef CONFIG_PCI
2624         struct mxser_board *brd = pci_get_drvdata(pdev);
2625         unsigned int i;
2626
2627         for (i = 0; i < brd->info->nports; i++)
2628                 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2629
2630         free_irq(pdev->irq, brd);
2631         pci_release_region(pdev, 2);
2632         pci_release_region(pdev, 3);
2633         pci_disable_device(pdev);
2634         brd->info = NULL;
2635 #endif
2636 }
2637
2638 static struct pci_driver mxser_driver = {
2639         .name = "mxser",
2640         .id_table = mxser_pcibrds,
2641         .probe = mxser_probe,
2642         .remove = __devexit_p(mxser_remove)
2643 };
2644
2645 static int __init mxser_module_init(void)
2646 {
2647         struct mxser_board *brd;
2648         unsigned int b, i, m;
2649         int retval;
2650
2651         mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2652         if (!mxvar_sdriver)
2653                 return -ENOMEM;
2654
2655         printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2656                 MXSER_VERSION);
2657
2658         /* Initialize the tty_driver structure */
2659         mxvar_sdriver->name = "ttyMI";
2660         mxvar_sdriver->major = ttymajor;
2661         mxvar_sdriver->minor_start = 0;
2662         mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2663         mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2664         mxvar_sdriver->init_termios = tty_std_termios;
2665         mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2666         mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2667         tty_set_operations(mxvar_sdriver, &mxser_ops);
2668
2669         retval = tty_register_driver(mxvar_sdriver);
2670         if (retval) {
2671                 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2672                                 "tty driver !\n");
2673                 goto err_put;
2674         }
2675
2676         /* Start finding ISA boards here */
2677         for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2678                 if (!ioaddr[b])
2679                         continue;
2680
2681                 brd = &mxser_boards[m];
2682                 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2683                 if (retval <= 0) {
2684                         brd->info = NULL;
2685                         continue;
2686                 }
2687
2688                 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2689                                 brd->info->name, ioaddr[b]);
2690
2691                 /* mxser_initbrd will hook ISR. */
2692                 if (mxser_initbrd(brd, NULL) < 0) {
2693                         brd->info = NULL;
2694                         continue;
2695                 }
2696
2697                 brd->idx = m * MXSER_PORTS_PER_BOARD;
2698                 for (i = 0; i < brd->info->nports; i++)
2699                         tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2700
2701                 m++;
2702         }
2703
2704         retval = pci_register_driver(&mxser_driver);
2705         if (retval) {
2706                 printk(KERN_ERR "mxser: can't register pci driver\n");
2707                 if (!m) {
2708                         retval = -ENODEV;
2709                         goto err_unr;
2710                 } /* else: we have some ISA cards under control */
2711         }
2712
2713         return 0;
2714 err_unr:
2715         tty_unregister_driver(mxvar_sdriver);
2716 err_put:
2717         put_tty_driver(mxvar_sdriver);
2718         return retval;
2719 }
2720
2721 static void __exit mxser_module_exit(void)
2722 {
2723         unsigned int i, j;
2724
2725         pci_unregister_driver(&mxser_driver);
2726
2727         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2728                 if (mxser_boards[i].info != NULL)
2729                         for (j = 0; j < mxser_boards[i].info->nports; j++)
2730                                 tty_unregister_device(mxvar_sdriver,
2731                                                 mxser_boards[i].idx + j);
2732         tty_unregister_driver(mxvar_sdriver);
2733         put_tty_driver(mxvar_sdriver);
2734
2735         for (i = 0; i < MXSER_BOARDS; i++)
2736                 if (mxser_boards[i].info != NULL)
2737                         mxser_release_ISA_res(&mxser_boards[i]);
2738 }
2739
2740 module_init(mxser_module_init);
2741 module_exit(mxser_module_exit);