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