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

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