linux/drivers/tty/mxser.c
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   1/*
   2 *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
   3 *
   4 *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com).
   5 *      Copyright (C) 2006-2008  Jiri Slaby <jirislaby@gmail.com>
   6 *
   7 *      This code is loosely based on the 1.8 moxa driver which is based on
   8 *      Linux serial driver, written by Linus Torvalds, Theodore T'so and
   9 *      others.
  10 *
  11 *      This program is free software; you can redistribute it and/or modify
  12 *      it under the terms of the GNU General Public License as published by
  13 *      the Free Software Foundation; either version 2 of the License, or
  14 *      (at your option) any later version.
  15 *
  16 *      Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
  17 *      <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
  18 *      www.moxa.com.
  19 *      - Fixed x86_64 cleanness
  20 */
  21
  22#include <linux/module.h>
  23#include <linux/errno.h>
  24#include <linux/signal.h>
  25#include <linux/sched.h>
  26#include <linux/timer.h>
  27#include <linux/interrupt.h>
  28#include <linux/tty.h>
  29#include <linux/tty_flip.h>
  30#include <linux/serial.h>
  31#include <linux/serial_reg.h>
  32#include <linux/major.h>
  33#include <linux/string.h>
  34#include <linux/fcntl.h>
  35#include <linux/ptrace.h>
  36#include <linux/ioport.h>
  37#include <linux/mm.h>
  38#include <linux/delay.h>
  39#include <linux/pci.h>
  40#include <linux/bitops.h>
  41#include <linux/slab.h>
  42#include <linux/ratelimit.h>
  43
  44#include <asm/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 */
  89static 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
 105struct mxser_cardinfo {
 106        char *name;
 107        unsigned int nports;
 108        unsigned int flags;
 109};
 110
 111static 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 */
 148static 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};
 177MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
 178
 179static unsigned long ioaddr[MXSER_BOARDS];
 180static int ttymajor = MXSERMAJOR;
 181
 182/* Variables for insmod */
 183
 184MODULE_AUTHOR("Casper Yang");
 185MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
 186module_param_array(ioaddr, ulong, NULL, 0);
 187MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
 188module_param(ttymajor, int, 0);
 189MODULE_LICENSE("GPL");
 190
 191struct mxser_log {
 192        int tick;
 193        unsigned long rxcnt[MXSER_PORTS];
 194        unsigned long txcnt[MXSER_PORTS];
 195};
 196
 197struct 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
 206struct 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
 222struct mxser_board;
 223
 224struct 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
 265struct 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
 278struct mxser_mstatus {
 279        tcflag_t cflag;
 280        int cts;
 281        int dsr;
 282        int ri;
 283        int dcd;
 284};
 285
 286static struct mxser_board mxser_boards[MXSER_BOARDS];
 287static struct tty_driver *mxvar_sdriver;
 288static struct mxser_log mxvar_log;
 289static int mxser_set_baud_method[MXSER_PORTS + 1];
 290
 291static 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#ifdef  CONFIG_PCI
 307static void mxser_disable_must_enchance_mode(unsigned long baseio)
 308{
 309        u8 oldlcr;
 310        u8 efr;
 311
 312        oldlcr = inb(baseio + UART_LCR);
 313        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 314
 315        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 316        efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
 317
 318        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 319        outb(oldlcr, baseio + UART_LCR);
 320}
 321#endif
 322
 323static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
 324{
 325        u8 oldlcr;
 326        u8 efr;
 327
 328        oldlcr = inb(baseio + UART_LCR);
 329        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 330
 331        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 332        efr &= ~MOXA_MUST_EFR_BANK_MASK;
 333        efr |= MOXA_MUST_EFR_BANK0;
 334
 335        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 336        outb(value, baseio + MOXA_MUST_XON1_REGISTER);
 337        outb(oldlcr, baseio + UART_LCR);
 338}
 339
 340static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
 341{
 342        u8 oldlcr;
 343        u8 efr;
 344
 345        oldlcr = inb(baseio + UART_LCR);
 346        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 347
 348        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 349        efr &= ~MOXA_MUST_EFR_BANK_MASK;
 350        efr |= MOXA_MUST_EFR_BANK0;
 351
 352        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 353        outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
 354        outb(oldlcr, baseio + UART_LCR);
 355}
 356
 357static void mxser_set_must_fifo_value(struct mxser_port *info)
 358{
 359        u8 oldlcr;
 360        u8 efr;
 361
 362        oldlcr = inb(info->ioaddr + UART_LCR);
 363        outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
 364
 365        efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
 366        efr &= ~MOXA_MUST_EFR_BANK_MASK;
 367        efr |= MOXA_MUST_EFR_BANK1;
 368
 369        outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
 370        outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
 371        outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
 372        outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
 373        outb(oldlcr, info->ioaddr + UART_LCR);
 374}
 375
 376static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
 377{
 378        u8 oldlcr;
 379        u8 efr;
 380
 381        oldlcr = inb(baseio + UART_LCR);
 382        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 383
 384        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 385        efr &= ~MOXA_MUST_EFR_BANK_MASK;
 386        efr |= MOXA_MUST_EFR_BANK2;
 387
 388        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 389        outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
 390        outb(oldlcr, baseio + UART_LCR);
 391}
 392
 393#ifdef CONFIG_PCI
 394static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
 395{
 396        u8 oldlcr;
 397        u8 efr;
 398
 399        oldlcr = inb(baseio + UART_LCR);
 400        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 401
 402        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 403        efr &= ~MOXA_MUST_EFR_BANK_MASK;
 404        efr |= MOXA_MUST_EFR_BANK2;
 405
 406        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 407        *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
 408        outb(oldlcr, baseio + UART_LCR);
 409}
 410#endif
 411
 412static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
 413{
 414        u8 oldlcr;
 415        u8 efr;
 416
 417        oldlcr = inb(baseio + UART_LCR);
 418        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 419
 420        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 421        efr &= ~MOXA_MUST_EFR_SF_MASK;
 422
 423        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 424        outb(oldlcr, baseio + UART_LCR);
 425}
 426
 427static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
 428{
 429        u8 oldlcr;
 430        u8 efr;
 431
 432        oldlcr = inb(baseio + UART_LCR);
 433        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 434
 435        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 436        efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 437        efr |= MOXA_MUST_EFR_SF_TX1;
 438
 439        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 440        outb(oldlcr, baseio + UART_LCR);
 441}
 442
 443static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
 444{
 445        u8 oldlcr;
 446        u8 efr;
 447
 448        oldlcr = inb(baseio + UART_LCR);
 449        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 450
 451        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 452        efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
 453
 454        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 455        outb(oldlcr, baseio + UART_LCR);
 456}
 457
 458static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
 459{
 460        u8 oldlcr;
 461        u8 efr;
 462
 463        oldlcr = inb(baseio + UART_LCR);
 464        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 465
 466        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 467        efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 468        efr |= MOXA_MUST_EFR_SF_RX1;
 469
 470        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 471        outb(oldlcr, baseio + UART_LCR);
 472}
 473
 474static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
 475{
 476        u8 oldlcr;
 477        u8 efr;
 478
 479        oldlcr = inb(baseio + UART_LCR);
 480        outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
 481
 482        efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
 483        efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
 484
 485        outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
 486        outb(oldlcr, baseio + UART_LCR);
 487}
 488
 489#ifdef CONFIG_PCI
 490static int __devinit CheckIsMoxaMust(unsigned long io)
 491{
 492        u8 oldmcr, hwid;
 493        int i;
 494
 495        outb(0, io + UART_LCR);
 496        mxser_disable_must_enchance_mode(io);
 497        oldmcr = inb(io + UART_MCR);
 498        outb(0, io + UART_MCR);
 499        mxser_set_must_xon1_value(io, 0x11);
 500        if ((hwid = inb(io + UART_MCR)) != 0) {
 501                outb(oldmcr, io + UART_MCR);
 502                return MOXA_OTHER_UART;
 503        }
 504
 505        mxser_get_must_hardware_id(io, &hwid);
 506        for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
 507                if (hwid == Gpci_uart_info[i].type)
 508                        return (int)hwid;
 509        }
 510        return MOXA_OTHER_UART;
 511}
 512#endif
 513
 514static void process_txrx_fifo(struct mxser_port *info)
 515{
 516        int i;
 517
 518        if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
 519                info->rx_trigger = 1;
 520                info->rx_high_water = 1;
 521                info->rx_low_water = 1;
 522                info->xmit_fifo_size = 1;
 523        } else
 524                for (i = 0; i < UART_INFO_NUM; i++)
 525                        if (info->board->chip_flag == Gpci_uart_info[i].type) {
 526                                info->rx_trigger = Gpci_uart_info[i].rx_trigger;
 527                                info->rx_low_water = Gpci_uart_info[i].rx_low_water;
 528                                info->rx_high_water = Gpci_uart_info[i].rx_high_water;
 529                                info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
 530                                break;
 531                        }
 532}
 533
 534static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
 535{
 536        static unsigned char mxser_msr[MXSER_PORTS + 1];
 537        unsigned char status = 0;
 538
 539        status = inb(baseaddr + UART_MSR);
 540
 541        mxser_msr[port] &= 0x0F;
 542        mxser_msr[port] |= status;
 543        status = mxser_msr[port];
 544        if (mode)
 545                mxser_msr[port] = 0;
 546
 547        return status;
 548}
 549
 550static int mxser_carrier_raised(struct tty_port *port)
 551{
 552        struct mxser_port *mp = container_of(port, struct mxser_port, port);
 553        return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
 554}
 555
 556static void mxser_dtr_rts(struct tty_port *port, int on)
 557{
 558        struct mxser_port *mp = container_of(port, struct mxser_port, port);
 559        unsigned long flags;
 560
 561        spin_lock_irqsave(&mp->slock, flags);
 562        if (on)
 563                outb(inb(mp->ioaddr + UART_MCR) |
 564                        UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
 565        else
 566                outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
 567                        mp->ioaddr + UART_MCR);
 568        spin_unlock_irqrestore(&mp->slock, flags);
 569}
 570
 571static int mxser_set_baud(struct tty_struct *tty, long newspd)
 572{
 573        struct mxser_port *info = tty->driver_data;
 574        int quot = 0, baud;
 575        unsigned char cval;
 576
 577        if (!info->ioaddr)
 578                return -1;
 579
 580        if (newspd > info->max_baud)
 581                return -1;
 582
 583        if (newspd == 134) {
 584                quot = 2 * info->baud_base / 269;
 585                tty_encode_baud_rate(tty, 134, 134);
 586        } else if (newspd) {
 587                quot = info->baud_base / newspd;
 588                if (quot == 0)
 589                        quot = 1;
 590                baud = info->baud_base/quot;
 591                tty_encode_baud_rate(tty, baud, baud);
 592        } else {
 593                quot = 0;
 594        }
 595
 596        info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
 597        info->timeout += HZ / 50;       /* Add .02 seconds of slop */
 598
 599        if (quot) {
 600                info->MCR |= UART_MCR_DTR;
 601                outb(info->MCR, info->ioaddr + UART_MCR);
 602        } else {
 603                info->MCR &= ~UART_MCR_DTR;
 604                outb(info->MCR, info->ioaddr + UART_MCR);
 605                return 0;
 606        }
 607
 608        cval = inb(info->ioaddr + UART_LCR);
 609
 610        outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR);    /* set DLAB */
 611
 612        outb(quot & 0xff, info->ioaddr + UART_DLL);     /* LS of divisor */
 613        outb(quot >> 8, info->ioaddr + UART_DLM);       /* MS of divisor */
 614        outb(cval, info->ioaddr + UART_LCR);    /* reset DLAB */
 615
 616#ifdef BOTHER
 617        if (C_BAUD(tty) == BOTHER) {
 618                quot = info->baud_base % newspd;
 619                quot *= 8;
 620                if (quot % newspd > newspd / 2) {
 621                        quot /= newspd;
 622                        quot++;
 623                } else
 624                        quot /= newspd;
 625
 626                mxser_set_must_enum_value(info->ioaddr, quot);
 627        } else
 628#endif
 629                mxser_set_must_enum_value(info->ioaddr, 0);
 630
 631        return 0;
 632}
 633
 634/*
 635 * This routine is called to set the UART divisor registers to match
 636 * the specified baud rate for a serial port.
 637 */
 638static int mxser_change_speed(struct tty_struct *tty,
 639                                        struct ktermios *old_termios)
 640{
 641        struct mxser_port *info = tty->driver_data;
 642        unsigned cflag, cval, fcr;
 643        int ret = 0;
 644        unsigned char status;
 645
 646        cflag = tty->termios->c_cflag;
 647        if (!info->ioaddr)
 648                return ret;
 649
 650        if (mxser_set_baud_method[tty->index] == 0)
 651                mxser_set_baud(tty, tty_get_baud_rate(tty));
 652
 653        /* byte size and parity */
 654        switch (cflag & CSIZE) {
 655        case CS5:
 656                cval = 0x00;
 657                break;
 658        case CS6:
 659                cval = 0x01;
 660                break;
 661        case CS7:
 662                cval = 0x02;
 663                break;
 664        case CS8:
 665                cval = 0x03;
 666                break;
 667        default:
 668                cval = 0x00;
 669                break;          /* too keep GCC shut... */
 670        }
 671        if (cflag & CSTOPB)
 672                cval |= 0x04;
 673        if (cflag & PARENB)
 674                cval |= UART_LCR_PARITY;
 675        if (!(cflag & PARODD))
 676                cval |= UART_LCR_EPAR;
 677        if (cflag & CMSPAR)
 678                cval |= UART_LCR_SPAR;
 679
 680        if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
 681                if (info->board->chip_flag) {
 682                        fcr = UART_FCR_ENABLE_FIFO;
 683                        fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 684                        mxser_set_must_fifo_value(info);
 685                } else
 686                        fcr = 0;
 687        } else {
 688                fcr = UART_FCR_ENABLE_FIFO;
 689                if (info->board->chip_flag) {
 690                        fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
 691                        mxser_set_must_fifo_value(info);
 692                } else {
 693                        switch (info->rx_trigger) {
 694                        case 1:
 695                                fcr |= UART_FCR_TRIGGER_1;
 696                                break;
 697                        case 4:
 698                                fcr |= UART_FCR_TRIGGER_4;
 699                                break;
 700                        case 8:
 701                                fcr |= UART_FCR_TRIGGER_8;
 702                                break;
 703                        default:
 704                                fcr |= UART_FCR_TRIGGER_14;
 705                                break;
 706                        }
 707                }
 708        }
 709
 710        /* CTS flow control flag and modem status interrupts */
 711        info->IER &= ~UART_IER_MSI;
 712        info->MCR &= ~UART_MCR_AFE;
 713        if (cflag & CRTSCTS) {
 714                info->port.flags |= ASYNC_CTS_FLOW;
 715                info->IER |= UART_IER_MSI;
 716                if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 717                        info->MCR |= UART_MCR_AFE;
 718                } else {
 719                        status = inb(info->ioaddr + UART_MSR);
 720                        if (tty->hw_stopped) {
 721                                if (status & UART_MSR_CTS) {
 722                                        tty->hw_stopped = 0;
 723                                        if (info->type != PORT_16550A &&
 724                                                        !info->board->chip_flag) {
 725                                                outb(info->IER & ~UART_IER_THRI,
 726                                                        info->ioaddr +
 727                                                        UART_IER);
 728                                                info->IER |= UART_IER_THRI;
 729                                                outb(info->IER, info->ioaddr +
 730                                                                UART_IER);
 731                                        }
 732                                        tty_wakeup(tty);
 733                                }
 734                        } else {
 735                                if (!(status & UART_MSR_CTS)) {
 736                                        tty->hw_stopped = 1;
 737                                        if ((info->type != PORT_16550A) &&
 738                                                        (!info->board->chip_flag)) {
 739                                                info->IER &= ~UART_IER_THRI;
 740                                                outb(info->IER, info->ioaddr +
 741                                                                UART_IER);
 742                                        }
 743                                }
 744                        }
 745                }
 746        } else {
 747                info->port.flags &= ~ASYNC_CTS_FLOW;
 748        }
 749        outb(info->MCR, info->ioaddr + UART_MCR);
 750        if (cflag & CLOCAL) {
 751                info->port.flags &= ~ASYNC_CHECK_CD;
 752        } else {
 753                info->port.flags |= ASYNC_CHECK_CD;
 754                info->IER |= UART_IER_MSI;
 755        }
 756        outb(info->IER, info->ioaddr + UART_IER);
 757
 758        /*
 759         * Set up parity check flag
 760         */
 761        info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 762        if (I_INPCK(tty))
 763                info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 764        if (I_BRKINT(tty) || I_PARMRK(tty))
 765                info->read_status_mask |= UART_LSR_BI;
 766
 767        info->ignore_status_mask = 0;
 768
 769        if (I_IGNBRK(tty)) {
 770                info->ignore_status_mask |= UART_LSR_BI;
 771                info->read_status_mask |= UART_LSR_BI;
 772                /*
 773                 * If we're ignore parity and break indicators, ignore
 774                 * overruns too.  (For real raw support).
 775                 */
 776                if (I_IGNPAR(tty)) {
 777                        info->ignore_status_mask |=
 778                                                UART_LSR_OE |
 779                                                UART_LSR_PE |
 780                                                UART_LSR_FE;
 781                        info->read_status_mask |=
 782                                                UART_LSR_OE |
 783                                                UART_LSR_PE |
 784                                                UART_LSR_FE;
 785                }
 786        }
 787        if (info->board->chip_flag) {
 788                mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
 789                mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
 790                if (I_IXON(tty)) {
 791                        mxser_enable_must_rx_software_flow_control(
 792                                        info->ioaddr);
 793                } else {
 794                        mxser_disable_must_rx_software_flow_control(
 795                                        info->ioaddr);
 796                }
 797                if (I_IXOFF(tty)) {
 798                        mxser_enable_must_tx_software_flow_control(
 799                                        info->ioaddr);
 800                } else {
 801                        mxser_disable_must_tx_software_flow_control(
 802                                        info->ioaddr);
 803                }
 804        }
 805
 806
 807        outb(fcr, info->ioaddr + UART_FCR);     /* set fcr */
 808        outb(cval, info->ioaddr + UART_LCR);
 809
 810        return ret;
 811}
 812
 813static void mxser_check_modem_status(struct tty_struct *tty,
 814                                struct mxser_port *port, int status)
 815{
 816        /* update input line counters */
 817        if (status & UART_MSR_TERI)
 818                port->icount.rng++;
 819        if (status & UART_MSR_DDSR)
 820                port->icount.dsr++;
 821        if (status & UART_MSR_DDCD)
 822                port->icount.dcd++;
 823        if (status & UART_MSR_DCTS)
 824                port->icount.cts++;
 825        port->mon_data.modem_status = status;
 826        wake_up_interruptible(&port->port.delta_msr_wait);
 827
 828        if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 829                if (status & UART_MSR_DCD)
 830                        wake_up_interruptible(&port->port.open_wait);
 831        }
 832
 833        if (port->port.flags & ASYNC_CTS_FLOW) {
 834                if (tty->hw_stopped) {
 835                        if (status & UART_MSR_CTS) {
 836                                tty->hw_stopped = 0;
 837
 838                                if ((port->type != PORT_16550A) &&
 839                                                (!port->board->chip_flag)) {
 840                                        outb(port->IER & ~UART_IER_THRI,
 841                                                port->ioaddr + UART_IER);
 842                                        port->IER |= UART_IER_THRI;
 843                                        outb(port->IER, port->ioaddr +
 844                                                        UART_IER);
 845                                }
 846                                tty_wakeup(tty);
 847                        }
 848                } else {
 849                        if (!(status & UART_MSR_CTS)) {
 850                                tty->hw_stopped = 1;
 851                                if (port->type != PORT_16550A &&
 852                                                !port->board->chip_flag) {
 853                                        port->IER &= ~UART_IER_THRI;
 854                                        outb(port->IER, port->ioaddr +
 855                                                        UART_IER);
 856                                }
 857                        }
 858                }
 859        }
 860}
 861
 862static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
 863{
 864        struct mxser_port *info = container_of(port, struct mxser_port, port);
 865        unsigned long page;
 866        unsigned long flags;
 867
 868        page = __get_free_page(GFP_KERNEL);
 869        if (!page)
 870                return -ENOMEM;
 871
 872        spin_lock_irqsave(&info->slock, flags);
 873
 874        if (!info->ioaddr || !info->type) {
 875                set_bit(TTY_IO_ERROR, &tty->flags);
 876                free_page(page);
 877                spin_unlock_irqrestore(&info->slock, flags);
 878                return 0;
 879        }
 880        info->port.xmit_buf = (unsigned char *) page;
 881
 882        /*
 883         * Clear the FIFO buffers and disable them
 884         * (they will be reenabled in mxser_change_speed())
 885         */
 886        if (info->board->chip_flag)
 887                outb((UART_FCR_CLEAR_RCVR |
 888                        UART_FCR_CLEAR_XMIT |
 889                        MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
 890        else
 891                outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
 892                        info->ioaddr + UART_FCR);
 893
 894        /*
 895         * At this point there's no way the LSR could still be 0xFF;
 896         * if it is, then bail out, because there's likely no UART
 897         * here.
 898         */
 899        if (inb(info->ioaddr + UART_LSR) == 0xff) {
 900                spin_unlock_irqrestore(&info->slock, flags);
 901                if (capable(CAP_SYS_ADMIN)) {
 902                        set_bit(TTY_IO_ERROR, &tty->flags);
 903                        return 0;
 904                } else
 905                        return -ENODEV;
 906        }
 907
 908        /*
 909         * Clear the interrupt registers.
 910         */
 911        (void) inb(info->ioaddr + UART_LSR);
 912        (void) inb(info->ioaddr + UART_RX);
 913        (void) inb(info->ioaddr + UART_IIR);
 914        (void) inb(info->ioaddr + UART_MSR);
 915
 916        /*
 917         * Now, initialize the UART
 918         */
 919        outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR);  /* reset DLAB */
 920        info->MCR = UART_MCR_DTR | UART_MCR_RTS;
 921        outb(info->MCR, info->ioaddr + UART_MCR);
 922
 923        /*
 924         * Finally, enable interrupts
 925         */
 926        info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
 927
 928        if (info->board->chip_flag)
 929                info->IER |= MOXA_MUST_IER_EGDAI;
 930        outb(info->IER, info->ioaddr + UART_IER);       /* enable interrupts */
 931
 932        /*
 933         * And clear the interrupt registers again for luck.
 934         */
 935        (void) inb(info->ioaddr + UART_LSR);
 936        (void) inb(info->ioaddr + UART_RX);
 937        (void) inb(info->ioaddr + UART_IIR);
 938        (void) inb(info->ioaddr + UART_MSR);
 939
 940        clear_bit(TTY_IO_ERROR, &tty->flags);
 941        info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 942
 943        /*
 944         * and set the speed of the serial port
 945         */
 946        mxser_change_speed(tty, NULL);
 947        spin_unlock_irqrestore(&info->slock, flags);
 948
 949        return 0;
 950}
 951
 952/*
 953 * This routine will shutdown a serial port
 954 */
 955static void mxser_shutdown_port(struct tty_port *port)
 956{
 957        struct mxser_port *info = container_of(port, struct mxser_port, port);
 958        unsigned long flags;
 959
 960        spin_lock_irqsave(&info->slock, flags);
 961
 962        /*
 963         * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
 964         * here so the queue might never be waken up
 965         */
 966        wake_up_interruptible(&info->port.delta_msr_wait);
 967
 968        /*
 969         * Free the xmit buffer, if necessary
 970         */
 971        if (info->port.xmit_buf) {
 972                free_page((unsigned long) info->port.xmit_buf);
 973                info->port.xmit_buf = NULL;
 974        }
 975
 976        info->IER = 0;
 977        outb(0x00, info->ioaddr + UART_IER);
 978
 979        /* clear Rx/Tx FIFO's */
 980        if (info->board->chip_flag)
 981                outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
 982                                MOXA_MUST_FCR_GDA_MODE_ENABLE,
 983                                info->ioaddr + UART_FCR);
 984        else
 985                outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
 986                        info->ioaddr + UART_FCR);
 987
 988        /* read data port to reset things */
 989        (void) inb(info->ioaddr + UART_RX);
 990
 991
 992        if (info->board->chip_flag)
 993                SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
 994
 995        spin_unlock_irqrestore(&info->slock, flags);
 996}
 997
 998/*
 999 * This routine is called whenever a serial port is opened.  It
1000 * enables interrupts for a serial port, linking in its async structure into
1001 * the IRQ chain.   It also performs the serial-specific
1002 * initialization for the tty structure.
1003 */
1004static int mxser_open(struct tty_struct *tty, struct file *filp)
1005{
1006        struct mxser_port *info;
1007        int line;
1008
1009        line = tty->index;
1010        if (line == MXSER_PORTS)
1011                return 0;
1012        info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1013        if (!info->ioaddr)
1014                return -ENODEV;
1015
1016        tty->driver_data = info;
1017        return tty_port_open(&info->port, tty, filp);
1018}
1019
1020static void mxser_flush_buffer(struct tty_struct *tty)
1021{
1022        struct mxser_port *info = tty->driver_data;
1023        char fcr;
1024        unsigned long flags;
1025
1026
1027        spin_lock_irqsave(&info->slock, flags);
1028        info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1029
1030        fcr = inb(info->ioaddr + UART_FCR);
1031        outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1032                info->ioaddr + UART_FCR);
1033        outb(fcr, info->ioaddr + UART_FCR);
1034
1035        spin_unlock_irqrestore(&info->slock, flags);
1036
1037        tty_wakeup(tty);
1038}
1039
1040
1041static void mxser_close_port(struct tty_port *port)
1042{
1043        struct mxser_port *info = container_of(port, struct mxser_port, port);
1044        unsigned long timeout;
1045        /*
1046         * At this point we stop accepting input.  To do this, we
1047         * disable the receive line status interrupts, and tell the
1048         * interrupt driver to stop checking the data ready bit in the
1049         * line status register.
1050         */
1051        info->IER &= ~UART_IER_RLSI;
1052        if (info->board->chip_flag)
1053                info->IER &= ~MOXA_MUST_RECV_ISR;
1054
1055        outb(info->IER, info->ioaddr + UART_IER);
1056        /*
1057         * Before we drop DTR, make sure the UART transmitter
1058         * has completely drained; this is especially
1059         * important if there is a transmit FIFO!
1060         */
1061        timeout = jiffies + HZ;
1062        while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1063                schedule_timeout_interruptible(5);
1064                if (time_after(jiffies, timeout))
1065                        break;
1066        }
1067}
1068
1069/*
1070 * This routine is called when the serial port gets closed.  First, we
1071 * wait for the last remaining data to be sent.  Then, we unlink its
1072 * async structure from the interrupt chain if necessary, and we free
1073 * that IRQ if nothing is left in the chain.
1074 */
1075static void mxser_close(struct tty_struct *tty, struct file *filp)
1076{
1077        struct mxser_port *info = tty->driver_data;
1078        struct tty_port *port = &info->port;
1079
1080        if (tty->index == MXSER_PORTS || info == NULL)
1081                return;
1082        if (tty_port_close_start(port, tty, filp) == 0)
1083                return;
1084        mutex_lock(&port->mutex);
1085        mxser_close_port(port);
1086        mxser_flush_buffer(tty);
1087        mxser_shutdown_port(port);
1088        clear_bit(ASYNCB_INITIALIZED, &port->flags);
1089        mutex_unlock(&port->mutex);
1090        /* Right now the tty_port set is done outside of the close_end helper
1091           as we don't yet have everyone using refcounts */     
1092        tty_port_close_end(port, tty);
1093        tty_port_tty_set(port, NULL);
1094}
1095
1096static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1097{
1098        int c, total = 0;
1099        struct mxser_port *info = tty->driver_data;
1100        unsigned long flags;
1101
1102        if (!info->port.xmit_buf)
1103                return 0;
1104
1105        while (1) {
1106                c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1107                                          SERIAL_XMIT_SIZE - info->xmit_head));
1108                if (c <= 0)
1109                        break;
1110
1111                memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1112                spin_lock_irqsave(&info->slock, flags);
1113                info->xmit_head = (info->xmit_head + c) &
1114                                  (SERIAL_XMIT_SIZE - 1);
1115                info->xmit_cnt += c;
1116                spin_unlock_irqrestore(&info->slock, flags);
1117
1118                buf += c;
1119                count -= c;
1120                total += c;
1121        }
1122
1123        if (info->xmit_cnt && !tty->stopped) {
1124                if (!tty->hw_stopped ||
1125                                (info->type == PORT_16550A) ||
1126                                (info->board->chip_flag)) {
1127                        spin_lock_irqsave(&info->slock, flags);
1128                        outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1129                                        UART_IER);
1130                        info->IER |= UART_IER_THRI;
1131                        outb(info->IER, info->ioaddr + UART_IER);
1132                        spin_unlock_irqrestore(&info->slock, flags);
1133                }
1134        }
1135        return total;
1136}
1137
1138static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1139{
1140        struct mxser_port *info = tty->driver_data;
1141        unsigned long flags;
1142
1143        if (!info->port.xmit_buf)
1144                return 0;
1145
1146        if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1147                return 0;
1148
1149        spin_lock_irqsave(&info->slock, flags);
1150        info->port.xmit_buf[info->xmit_head++] = ch;
1151        info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1152        info->xmit_cnt++;
1153        spin_unlock_irqrestore(&info->slock, flags);
1154        if (!tty->stopped) {
1155                if (!tty->hw_stopped ||
1156                                (info->type == PORT_16550A) ||
1157                                info->board->chip_flag) {
1158                        spin_lock_irqsave(&info->slock, flags);
1159                        outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1160                        info->IER |= UART_IER_THRI;
1161                        outb(info->IER, info->ioaddr + UART_IER);
1162                        spin_unlock_irqrestore(&info->slock, flags);
1163                }
1164        }
1165        return 1;
1166}
1167
1168
1169static void mxser_flush_chars(struct tty_struct *tty)
1170{
1171        struct mxser_port *info = tty->driver_data;
1172        unsigned long flags;
1173
1174        if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1175                        (tty->hw_stopped && info->type != PORT_16550A &&
1176                         !info->board->chip_flag))
1177                return;
1178
1179        spin_lock_irqsave(&info->slock, flags);
1180
1181        outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1182        info->IER |= UART_IER_THRI;
1183        outb(info->IER, info->ioaddr + UART_IER);
1184
1185        spin_unlock_irqrestore(&info->slock, flags);
1186}
1187
1188static int mxser_write_room(struct tty_struct *tty)
1189{
1190        struct mxser_port *info = tty->driver_data;
1191        int ret;
1192
1193        ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1194        return ret < 0 ? 0 : ret;
1195}
1196
1197static int mxser_chars_in_buffer(struct tty_struct *tty)
1198{
1199        struct mxser_port *info = tty->driver_data;
1200        return info->xmit_cnt;
1201}
1202
1203/*
1204 * ------------------------------------------------------------
1205 * friends of mxser_ioctl()
1206 * ------------------------------------------------------------
1207 */
1208static int mxser_get_serial_info(struct tty_struct *tty,
1209                struct serial_struct __user *retinfo)
1210{
1211        struct mxser_port *info = tty->driver_data;
1212        struct serial_struct tmp = {
1213                .type = info->type,
1214                .line = tty->index,
1215                .port = info->ioaddr,
1216                .irq = info->board->irq,
1217                .flags = info->port.flags,
1218                .baud_base = info->baud_base,
1219                .close_delay = info->port.close_delay,
1220                .closing_wait = info->port.closing_wait,
1221                .custom_divisor = info->custom_divisor,
1222                .hub6 = 0
1223        };
1224        if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1225                return -EFAULT;
1226        return 0;
1227}
1228
1229static int mxser_set_serial_info(struct tty_struct *tty,
1230                struct serial_struct __user *new_info)
1231{
1232        struct mxser_port *info = tty->driver_data;
1233        struct tty_port *port = &info->port;
1234        struct serial_struct new_serial;
1235        speed_t baud;
1236        unsigned long sl_flags;
1237        unsigned int flags;
1238        int retval = 0;
1239
1240        if (!new_info || !info->ioaddr)
1241                return -ENODEV;
1242        if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1243                return -EFAULT;
1244
1245        if (new_serial.irq != info->board->irq ||
1246                        new_serial.port != info->ioaddr)
1247                return -EINVAL;
1248
1249        flags = port->flags & ASYNC_SPD_MASK;
1250
1251        if (!capable(CAP_SYS_ADMIN)) {
1252                if ((new_serial.baud_base != info->baud_base) ||
1253                                (new_serial.close_delay != info->port.close_delay) ||
1254                                ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1255                        return -EPERM;
1256                info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1257                                (new_serial.flags & ASYNC_USR_MASK));
1258        } else {
1259                /*
1260                 * OK, past this point, all the error checking has been done.
1261                 * At this point, we start making changes.....
1262                 */
1263                port->flags = ((port->flags & ~ASYNC_FLAGS) |
1264                                (new_serial.flags & ASYNC_FLAGS));
1265                port->close_delay = new_serial.close_delay * HZ / 100;
1266                port->closing_wait = new_serial.closing_wait * HZ / 100;
1267                tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1268                if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1269                                (new_serial.baud_base != info->baud_base ||
1270                                new_serial.custom_divisor !=
1271                                info->custom_divisor)) {
1272                        if (new_serial.custom_divisor == 0)
1273                                return -EINVAL;
1274                        baud = new_serial.baud_base / new_serial.custom_divisor;
1275                        tty_encode_baud_rate(tty, baud, baud);
1276                }
1277        }
1278
1279        info->type = new_serial.type;
1280
1281        process_txrx_fifo(info);
1282
1283        if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1284                if (flags != (port->flags & ASYNC_SPD_MASK)) {
1285                        spin_lock_irqsave(&info->slock, sl_flags);
1286                        mxser_change_speed(tty, NULL);
1287                        spin_unlock_irqrestore(&info->slock, sl_flags);
1288                }
1289        } else {
1290                retval = mxser_activate(port, tty);
1291                if (retval == 0)
1292                        set_bit(ASYNCB_INITIALIZED, &port->flags);
1293        }
1294        return retval;
1295}
1296
1297/*
1298 * mxser_get_lsr_info - get line status register info
1299 *
1300 * Purpose: Let user call ioctl() to get info when the UART physically
1301 *          is emptied.  On bus types like RS485, the transmitter must
1302 *          release the bus after transmitting. This must be done when
1303 *          the transmit shift register is empty, not be done when the
1304 *          transmit holding register is empty.  This functionality
1305 *          allows an RS485 driver to be written in user space.
1306 */
1307static int mxser_get_lsr_info(struct mxser_port *info,
1308                unsigned int __user *value)
1309{
1310        unsigned char status;
1311        unsigned int result;
1312        unsigned long flags;
1313
1314        spin_lock_irqsave(&info->slock, flags);
1315        status = inb(info->ioaddr + UART_LSR);
1316        spin_unlock_irqrestore(&info->slock, flags);
1317        result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1318        return put_user(result, value);
1319}
1320
1321static int mxser_tiocmget(struct tty_struct *tty)
1322{
1323        struct mxser_port *info = tty->driver_data;
1324        unsigned char control, status;
1325        unsigned long flags;
1326
1327
1328        if (tty->index == MXSER_PORTS)
1329                return -ENOIOCTLCMD;
1330        if (test_bit(TTY_IO_ERROR, &tty->flags))
1331                return -EIO;
1332
1333        control = info->MCR;
1334
1335        spin_lock_irqsave(&info->slock, flags);
1336        status = inb(info->ioaddr + UART_MSR);
1337        if (status & UART_MSR_ANY_DELTA)
1338                mxser_check_modem_status(tty, info, status);
1339        spin_unlock_irqrestore(&info->slock, flags);
1340        return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1341                    ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1342                    ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1343                    ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1344                    ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1345                    ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1346}
1347
1348static int mxser_tiocmset(struct tty_struct *tty,
1349                unsigned int set, unsigned int clear)
1350{
1351        struct mxser_port *info = tty->driver_data;
1352        unsigned long flags;
1353
1354
1355        if (tty->index == MXSER_PORTS)
1356                return -ENOIOCTLCMD;
1357        if (test_bit(TTY_IO_ERROR, &tty->flags))
1358                return -EIO;
1359
1360        spin_lock_irqsave(&info->slock, flags);
1361
1362        if (set & TIOCM_RTS)
1363                info->MCR |= UART_MCR_RTS;
1364        if (set & TIOCM_DTR)
1365                info->MCR |= UART_MCR_DTR;
1366
1367        if (clear & TIOCM_RTS)
1368                info->MCR &= ~UART_MCR_RTS;
1369        if (clear & TIOCM_DTR)
1370                info->MCR &= ~UART_MCR_DTR;
1371
1372        outb(info->MCR, info->ioaddr + UART_MCR);
1373        spin_unlock_irqrestore(&info->slock, flags);
1374        return 0;
1375}
1376
1377static int __init mxser_program_mode(int port)
1378{
1379        int id, i, j, n;
1380
1381        outb(0, port);
1382        outb(0, port);
1383        outb(0, port);
1384        (void)inb(port);
1385        (void)inb(port);
1386        outb(0, port);
1387        (void)inb(port);
1388
1389        id = inb(port + 1) & 0x1F;
1390        if ((id != C168_ASIC_ID) &&
1391                        (id != C104_ASIC_ID) &&
1392                        (id != C102_ASIC_ID) &&
1393                        (id != CI132_ASIC_ID) &&
1394                        (id != CI134_ASIC_ID) &&
1395                        (id != CI104J_ASIC_ID))
1396                return -1;
1397        for (i = 0, j = 0; i < 4; i++) {
1398                n = inb(port + 2);
1399                if (n == 'M') {
1400                        j = 1;
1401                } else if ((j == 1) && (n == 1)) {
1402                        j = 2;
1403                        break;
1404                } else
1405                        j = 0;
1406        }
1407        if (j != 2)
1408                id = -2;
1409        return id;
1410}
1411
1412static void __init mxser_normal_mode(int port)
1413{
1414        int i, n;
1415
1416        outb(0xA5, port + 1);
1417        outb(0x80, port + 3);
1418        outb(12, port + 0);     /* 9600 bps */
1419        outb(0, port + 1);
1420        outb(0x03, port + 3);   /* 8 data bits */
1421        outb(0x13, port + 4);   /* loop back mode */
1422        for (i = 0; i < 16; i++) {
1423                n = inb(port + 5);
1424                if ((n & 0x61) == 0x60)
1425                        break;
1426                if ((n & 1) == 1)
1427                        (void)inb(port);
1428        }
1429        outb(0x00, port + 4);
1430}
1431
1432#define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1433#define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1434#define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1435#define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1436#define EN_CCMD         0x000   /* Chip's command register     */
1437#define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1438#define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1439#define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1440#define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1441#define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1442#define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1443#define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1444#define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1445static int __init mxser_read_register(int port, unsigned short *regs)
1446{
1447        int i, k, value, id;
1448        unsigned int j;
1449
1450        id = mxser_program_mode(port);
1451        if (id < 0)
1452                return id;
1453        for (i = 0; i < 14; i++) {
1454                k = (i & 0x3F) | 0x180;
1455                for (j = 0x100; j > 0; j >>= 1) {
1456                        outb(CHIP_CS, port);
1457                        if (k & j) {
1458                                outb(CHIP_CS | CHIP_DO, port);
1459                                outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1460                        } else {
1461                                outb(CHIP_CS, port);
1462                                outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1463                        }
1464                }
1465                (void)inb(port);
1466                value = 0;
1467                for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1468                        outb(CHIP_CS, port);
1469                        outb(CHIP_CS | CHIP_SK, port);
1470                        if (inb(port) & CHIP_DI)
1471                                value |= j;
1472                }
1473                regs[i] = value;
1474                outb(0, port);
1475        }
1476        mxser_normal_mode(port);
1477        return id;
1478}
1479
1480static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1481{
1482        struct mxser_port *ip;
1483        struct tty_port *port;
1484        struct tty_struct *tty;
1485        int result, status;
1486        unsigned int i, j;
1487        int ret = 0;
1488
1489        switch (cmd) {
1490        case MOXA_GET_MAJOR:
1491                printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1492                                        "%x (GET_MAJOR), fix your userspace\n",
1493                                        current->comm, cmd);
1494                return put_user(ttymajor, (int __user *)argp);
1495
1496        case MOXA_CHKPORTENABLE:
1497                result = 0;
1498                for (i = 0; i < MXSER_BOARDS; i++)
1499                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1500                                if (mxser_boards[i].ports[j].ioaddr)
1501                                        result |= (1 << i);
1502                return put_user(result, (unsigned long __user *)argp);
1503        case MOXA_GETDATACOUNT:
1504                /* The receive side is locked by port->slock but it isn't
1505                   clear that an exact snapshot is worth copying here */
1506                if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1507                        ret = -EFAULT;
1508                return ret;
1509        case MOXA_GETMSTATUS: {
1510                struct mxser_mstatus ms, __user *msu = argp;
1511                for (i = 0; i < MXSER_BOARDS; i++)
1512                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1513                                ip = &mxser_boards[i].ports[j];
1514                                port = &ip->port;
1515                                memset(&ms, 0, sizeof(ms));
1516
1517                                mutex_lock(&port->mutex);
1518                                if (!ip->ioaddr)
1519                                        goto copy;
1520                                
1521                                tty = tty_port_tty_get(port);
1522
1523                                if (!tty || !tty->termios)
1524                                        ms.cflag = ip->normal_termios.c_cflag;
1525                                else
1526                                        ms.cflag = tty->termios->c_cflag;
1527                                tty_kref_put(tty);
1528                                spin_lock_irq(&ip->slock);
1529                                status = inb(ip->ioaddr + UART_MSR);
1530                                spin_unlock_irq(&ip->slock);
1531                                if (status & UART_MSR_DCD)
1532                                        ms.dcd = 1;
1533                                if (status & UART_MSR_DSR)
1534                                        ms.dsr = 1;
1535                                if (status & UART_MSR_CTS)
1536                                        ms.cts = 1;
1537                        copy:
1538                                mutex_unlock(&port->mutex);
1539                                if (copy_to_user(msu, &ms, sizeof(ms)))
1540                                        return -EFAULT;
1541                                msu++;
1542                        }
1543                return 0;
1544        }
1545        case MOXA_ASPP_MON_EXT: {
1546                struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1547                unsigned int cflag, iflag, p;
1548                u8 opmode;
1549
1550                me = kzalloc(sizeof(*me), GFP_KERNEL);
1551                if (!me)
1552                        return -ENOMEM;
1553
1554                for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1555                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1556                                if (p >= ARRAY_SIZE(me->rx_cnt)) {
1557                                        i = MXSER_BOARDS;
1558                                        break;
1559                                }
1560                                ip = &mxser_boards[i].ports[j];
1561                                port = &ip->port;
1562
1563                                mutex_lock(&port->mutex);
1564                                if (!ip->ioaddr) {
1565                                        mutex_unlock(&port->mutex);
1566                                        continue;
1567                                }
1568
1569                                spin_lock_irq(&ip->slock);
1570                                status = mxser_get_msr(ip->ioaddr, 0, p);
1571
1572                                if (status & UART_MSR_TERI)
1573                                        ip->icount.rng++;
1574                                if (status & UART_MSR_DDSR)
1575                                        ip->icount.dsr++;
1576                                if (status & UART_MSR_DDCD)
1577                                        ip->icount.dcd++;
1578                                if (status & UART_MSR_DCTS)
1579                                        ip->icount.cts++;
1580
1581                                ip->mon_data.modem_status = status;
1582                                me->rx_cnt[p] = ip->mon_data.rxcnt;
1583                                me->tx_cnt[p] = ip->mon_data.txcnt;
1584                                me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1585                                me->up_txcnt[p] = ip->mon_data.up_txcnt;
1586                                me->modem_status[p] =
1587                                        ip->mon_data.modem_status;
1588                                spin_unlock_irq(&ip->slock);
1589
1590                                tty = tty_port_tty_get(&ip->port);
1591
1592                                if (!tty || !tty->termios) {
1593                                        cflag = ip->normal_termios.c_cflag;
1594                                        iflag = ip->normal_termios.c_iflag;
1595                                        me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1596                                } else {
1597                                        cflag = tty->termios->c_cflag;
1598                                        iflag = tty->termios->c_iflag;
1599                                        me->baudrate[p] = tty_get_baud_rate(tty);
1600                                }
1601                                tty_kref_put(tty);
1602
1603                                me->databits[p] = cflag & CSIZE;
1604                                me->stopbits[p] = cflag & CSTOPB;
1605                                me->parity[p] = cflag & (PARENB | PARODD |
1606                                                CMSPAR);
1607
1608                                if (cflag & CRTSCTS)
1609                                        me->flowctrl[p] |= 0x03;
1610
1611                                if (iflag & (IXON | IXOFF))
1612                                        me->flowctrl[p] |= 0x0C;
1613
1614                                if (ip->type == PORT_16550A)
1615                                        me->fifo[p] = 1;
1616
1617                                opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1618                                opmode &= OP_MODE_MASK;
1619                                me->iftype[p] = opmode;
1620                                mutex_unlock(&port->mutex);
1621                        }
1622                }
1623                if (copy_to_user(argp, me, sizeof(*me)))
1624                        ret = -EFAULT;
1625                kfree(me);
1626                return ret;
1627        }
1628        default:
1629                return -ENOIOCTLCMD;
1630        }
1631        return 0;
1632}
1633
1634static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1635                struct async_icount *cprev)
1636{
1637        struct async_icount cnow;
1638        unsigned long flags;
1639        int ret;
1640
1641        spin_lock_irqsave(&info->slock, flags);
1642        cnow = info->icount;    /* atomic copy */
1643        spin_unlock_irqrestore(&info->slock, flags);
1644
1645        ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1646                ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1647                ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1648                ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1649
1650        *cprev = cnow;
1651
1652        return ret;
1653}
1654
1655static int mxser_ioctl(struct tty_struct *tty,
1656                unsigned int cmd, unsigned long arg)
1657{
1658        struct mxser_port *info = tty->driver_data;
1659        struct tty_port *port = &info->port;
1660        struct async_icount cnow;
1661        unsigned long flags;
1662        void __user *argp = (void __user *)arg;
1663        int retval;
1664
1665        if (tty->index == MXSER_PORTS)
1666                return mxser_ioctl_special(cmd, argp);
1667
1668        if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1669                int p;
1670                unsigned long opmode;
1671                static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1672                int shiftbit;
1673                unsigned char val, mask;
1674
1675                p = tty->index % 4;
1676                if (cmd == MOXA_SET_OP_MODE) {
1677                        if (get_user(opmode, (int __user *) argp))
1678                                return -EFAULT;
1679                        if (opmode != RS232_MODE &&
1680                                        opmode != RS485_2WIRE_MODE &&
1681                                        opmode != RS422_MODE &&
1682                                        opmode != RS485_4WIRE_MODE)
1683                                return -EFAULT;
1684                        mask = ModeMask[p];
1685                        shiftbit = p * 2;
1686                        spin_lock_irq(&info->slock);
1687                        val = inb(info->opmode_ioaddr);
1688                        val &= mask;
1689                        val |= (opmode << shiftbit);
1690                        outb(val, info->opmode_ioaddr);
1691                        spin_unlock_irq(&info->slock);
1692                } else {
1693                        shiftbit = p * 2;
1694                        spin_lock_irq(&info->slock);
1695                        opmode = inb(info->opmode_ioaddr) >> shiftbit;
1696                        spin_unlock_irq(&info->slock);
1697                        opmode &= OP_MODE_MASK;
1698                        if (put_user(opmode, (int __user *)argp))
1699                                return -EFAULT;
1700                }
1701                return 0;
1702        }
1703
1704        if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1705                        test_bit(TTY_IO_ERROR, &tty->flags))
1706                return -EIO;
1707
1708        switch (cmd) {
1709        case TIOCGSERIAL:
1710                mutex_lock(&port->mutex);
1711                retval = mxser_get_serial_info(tty, argp);
1712                mutex_unlock(&port->mutex);
1713                return retval;
1714        case TIOCSSERIAL:
1715                mutex_lock(&port->mutex);
1716                retval = mxser_set_serial_info(tty, argp);
1717                mutex_unlock(&port->mutex);
1718                return retval;
1719        case TIOCSERGETLSR:     /* Get line status register */
1720                return  mxser_get_lsr_info(info, argp);
1721                /*
1722                 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1723                 * - mask passed in arg for lines of interest
1724                 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1725                 * Caller should use TIOCGICOUNT to see which one it was
1726                 */
1727        case TIOCMIWAIT:
1728                spin_lock_irqsave(&info->slock, flags);
1729                cnow = info->icount;    /* note the counters on entry */
1730                spin_unlock_irqrestore(&info->slock, flags);
1731
1732                return wait_event_interruptible(info->port.delta_msr_wait,
1733                                mxser_cflags_changed(info, arg, &cnow));
1734        case MOXA_HighSpeedOn:
1735                return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1736        case MOXA_SDS_RSTICOUNTER:
1737                spin_lock_irq(&info->slock);
1738                info->mon_data.rxcnt = 0;
1739                info->mon_data.txcnt = 0;
1740                spin_unlock_irq(&info->slock);
1741                return 0;
1742
1743        case MOXA_ASPP_OQUEUE:{
1744                int len, lsr;
1745
1746                len = mxser_chars_in_buffer(tty);
1747                spin_lock_irq(&info->slock);
1748                lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1749                spin_unlock_irq(&info->slock);
1750                len += (lsr ? 0 : 1);
1751
1752                return put_user(len, (int __user *)argp);
1753        }
1754        case MOXA_ASPP_MON: {
1755                int mcr, status;
1756
1757                spin_lock_irq(&info->slock);
1758                status = mxser_get_msr(info->ioaddr, 1, tty->index);
1759                mxser_check_modem_status(tty, info, status);
1760
1761                mcr = inb(info->ioaddr + UART_MCR);
1762                spin_unlock_irq(&info->slock);
1763
1764                if (mcr & MOXA_MUST_MCR_XON_FLAG)
1765                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1766                else
1767                        info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1768
1769                if (mcr & MOXA_MUST_MCR_TX_XON)
1770                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1771                else
1772                        info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1773
1774                if (tty->hw_stopped)
1775                        info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1776                else
1777                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1778
1779                if (copy_to_user(argp, &info->mon_data,
1780                                sizeof(struct mxser_mon)))
1781                        return -EFAULT;
1782
1783                return 0;
1784        }
1785        case MOXA_ASPP_LSTATUS: {
1786                if (put_user(info->err_shadow, (unsigned char __user *)argp))
1787                        return -EFAULT;
1788
1789                info->err_shadow = 0;
1790                return 0;
1791        }
1792        case MOXA_SET_BAUD_METHOD: {
1793                int method;
1794
1795                if (get_user(method, (int __user *)argp))
1796                        return -EFAULT;
1797                mxser_set_baud_method[tty->index] = method;
1798                return put_user(method, (int __user *)argp);
1799        }
1800        default:
1801                return -ENOIOCTLCMD;
1802        }
1803        return 0;
1804}
1805
1806        /*
1807         * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1808         * Return: write counters to the user passed counter struct
1809         * NB: both 1->0 and 0->1 transitions are counted except for
1810         *     RI where only 0->1 is counted.
1811         */
1812
1813static int mxser_get_icount(struct tty_struct *tty,
1814                struct serial_icounter_struct *icount)
1815
1816{
1817        struct mxser_port *info = tty->driver_data;
1818        struct async_icount cnow;
1819        unsigned long flags;
1820
1821        spin_lock_irqsave(&info->slock, flags);
1822        cnow = info->icount;
1823        spin_unlock_irqrestore(&info->slock, flags);
1824
1825        icount->frame = cnow.frame;
1826        icount->brk = cnow.brk;
1827        icount->overrun = cnow.overrun;
1828        icount->buf_overrun = cnow.buf_overrun;
1829        icount->parity = cnow.parity;
1830        icount->rx = cnow.rx;
1831        icount->tx = cnow.tx;
1832        icount->cts = cnow.cts;
1833        icount->dsr = cnow.dsr;
1834        icount->rng = cnow.rng;
1835        icount->dcd = cnow.dcd;
1836        return 0;
1837}
1838
1839static void mxser_stoprx(struct tty_struct *tty)
1840{
1841        struct mxser_port *info = tty->driver_data;
1842
1843        info->ldisc_stop_rx = 1;
1844        if (I_IXOFF(tty)) {
1845                if (info->board->chip_flag) {
1846                        info->IER &= ~MOXA_MUST_RECV_ISR;
1847                        outb(info->IER, info->ioaddr + UART_IER);
1848                } else {
1849                        info->x_char = STOP_CHAR(tty);
1850                        outb(0, info->ioaddr + UART_IER);
1851                        info->IER |= UART_IER_THRI;
1852                        outb(info->IER, info->ioaddr + UART_IER);
1853                }
1854        }
1855
1856        if (tty->termios->c_cflag & CRTSCTS) {
1857                info->MCR &= ~UART_MCR_RTS;
1858                outb(info->MCR, info->ioaddr + UART_MCR);
1859        }
1860}
1861
1862/*
1863 * This routine is called by the upper-layer tty layer to signal that
1864 * incoming characters should be throttled.
1865 */
1866static void mxser_throttle(struct tty_struct *tty)
1867{
1868        mxser_stoprx(tty);
1869}
1870
1871static void mxser_unthrottle(struct tty_struct *tty)
1872{
1873        struct mxser_port *info = tty->driver_data;
1874
1875        /* startrx */
1876        info->ldisc_stop_rx = 0;
1877        if (I_IXOFF(tty)) {
1878                if (info->x_char)
1879                        info->x_char = 0;
1880                else {
1881                        if (info->board->chip_flag) {
1882                                info->IER |= MOXA_MUST_RECV_ISR;
1883                                outb(info->IER, info->ioaddr + UART_IER);
1884                        } else {
1885                                info->x_char = START_CHAR(tty);
1886                                outb(0, info->ioaddr + UART_IER);
1887                                info->IER |= UART_IER_THRI;
1888                                outb(info->IER, info->ioaddr + UART_IER);
1889                        }
1890                }
1891        }
1892
1893        if (tty->termios->c_cflag & CRTSCTS) {
1894                info->MCR |= UART_MCR_RTS;
1895                outb(info->MCR, info->ioaddr + UART_MCR);
1896        }
1897}
1898
1899/*
1900 * mxser_stop() and mxser_start()
1901 *
1902 * This routines are called before setting or resetting tty->stopped.
1903 * They enable or disable transmitter interrupts, as necessary.
1904 */
1905static void mxser_stop(struct tty_struct *tty)
1906{
1907        struct mxser_port *info = tty->driver_data;
1908        unsigned long flags;
1909
1910        spin_lock_irqsave(&info->slock, flags);
1911        if (info->IER & UART_IER_THRI) {
1912                info->IER &= ~UART_IER_THRI;
1913                outb(info->IER, info->ioaddr + UART_IER);
1914        }
1915        spin_unlock_irqrestore(&info->slock, flags);
1916}
1917
1918static void mxser_start(struct tty_struct *tty)
1919{
1920        struct mxser_port *info = tty->driver_data;
1921        unsigned long flags;
1922
1923        spin_lock_irqsave(&info->slock, flags);
1924        if (info->xmit_cnt && info->port.xmit_buf) {
1925                outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1926                info->IER |= UART_IER_THRI;
1927                outb(info->IER, info->ioaddr + UART_IER);
1928        }
1929        spin_unlock_irqrestore(&info->slock, flags);
1930}
1931
1932static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1933{
1934        struct mxser_port *info = tty->driver_data;
1935        unsigned long flags;
1936
1937        spin_lock_irqsave(&info->slock, flags);
1938        mxser_change_speed(tty, old_termios);
1939        spin_unlock_irqrestore(&info->slock, flags);
1940
1941        if ((old_termios->c_cflag & CRTSCTS) &&
1942                        !(tty->termios->c_cflag & CRTSCTS)) {
1943                tty->hw_stopped = 0;
1944                mxser_start(tty);
1945        }
1946
1947        /* Handle sw stopped */
1948        if ((old_termios->c_iflag & IXON) &&
1949                        !(tty->termios->c_iflag & IXON)) {
1950                tty->stopped = 0;
1951
1952                if (info->board->chip_flag) {
1953                        spin_lock_irqsave(&info->slock, flags);
1954                        mxser_disable_must_rx_software_flow_control(
1955                                        info->ioaddr);
1956                        spin_unlock_irqrestore(&info->slock, flags);
1957                }
1958
1959                mxser_start(tty);
1960        }
1961}
1962
1963/*
1964 * mxser_wait_until_sent() --- wait until the transmitter is empty
1965 */
1966static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1967{
1968        struct mxser_port *info = tty->driver_data;
1969        unsigned long orig_jiffies, char_time;
1970        unsigned long flags;
1971        int lsr;
1972
1973        if (info->type == PORT_UNKNOWN)
1974                return;
1975
1976        if (info->xmit_fifo_size == 0)
1977                return;         /* Just in case.... */
1978
1979        orig_jiffies = jiffies;
1980        /*
1981         * Set the check interval to be 1/5 of the estimated time to
1982         * send a single character, and make it at least 1.  The check
1983         * interval should also be less than the timeout.
1984         *
1985         * Note: we have to use pretty tight timings here to satisfy
1986         * the NIST-PCTS.
1987         */
1988        char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1989        char_time = char_time / 5;
1990        if (char_time == 0)
1991                char_time = 1;
1992        if (timeout && timeout < char_time)
1993                char_time = timeout;
1994        /*
1995         * If the transmitter hasn't cleared in twice the approximate
1996         * amount of time to send the entire FIFO, it probably won't
1997         * ever clear.  This assumes the UART isn't doing flow
1998         * control, which is currently the case.  Hence, if it ever
1999         * takes longer than info->timeout, this is probably due to a
2000         * UART bug of some kind.  So, we clamp the timeout parameter at
2001         * 2*info->timeout.
2002         */
2003        if (!timeout || timeout > 2 * info->timeout)
2004                timeout = 2 * info->timeout;
2005
2006        spin_lock_irqsave(&info->slock, flags);
2007        while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2008                spin_unlock_irqrestore(&info->slock, flags);
2009                schedule_timeout_interruptible(char_time);
2010                spin_lock_irqsave(&info->slock, flags);
2011                if (signal_pending(current))
2012                        break;
2013                if (timeout && time_after(jiffies, orig_jiffies + timeout))
2014                        break;
2015        }
2016        spin_unlock_irqrestore(&info->slock, flags);
2017        set_current_state(TASK_RUNNING);
2018}
2019
2020/*
2021 * This routine is called by tty_hangup() when a hangup is signaled.
2022 */
2023static void mxser_hangup(struct tty_struct *tty)
2024{
2025        struct mxser_port *info = tty->driver_data;
2026
2027        mxser_flush_buffer(tty);
2028        tty_port_hangup(&info->port);
2029}
2030
2031/*
2032 * mxser_rs_break() --- routine which turns the break handling on or off
2033 */
2034static int mxser_rs_break(struct tty_struct *tty, int break_state)
2035{
2036        struct mxser_port *info = tty->driver_data;
2037        unsigned long flags;
2038
2039        spin_lock_irqsave(&info->slock, flags);
2040        if (break_state == -1)
2041                outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2042                        info->ioaddr + UART_LCR);
2043        else
2044                outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2045                        info->ioaddr + UART_LCR);
2046        spin_unlock_irqrestore(&info->slock, flags);
2047        return 0;
2048}
2049
2050static void mxser_receive_chars(struct tty_struct *tty,
2051                                struct mxser_port *port, int *status)
2052{
2053        unsigned char ch, gdl;
2054        int ignored = 0;
2055        int cnt = 0;
2056        int recv_room;
2057        int max = 256;
2058
2059        recv_room = tty->receive_room;
2060        if (recv_room == 0 && !port->ldisc_stop_rx)
2061                mxser_stoprx(tty);
2062        if (port->board->chip_flag != MOXA_OTHER_UART) {
2063
2064                if (*status & UART_LSR_SPECIAL)
2065                        goto intr_old;
2066                if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2067                                (*status & MOXA_MUST_LSR_RERR))
2068                        goto intr_old;
2069                if (*status & MOXA_MUST_LSR_RERR)
2070                        goto intr_old;
2071
2072                gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2073
2074                if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2075                        gdl &= MOXA_MUST_GDL_MASK;
2076                if (gdl >= recv_room) {
2077                        if (!port->ldisc_stop_rx)
2078                                mxser_stoprx(tty);
2079                }
2080                while (gdl--) {
2081                        ch = inb(port->ioaddr + UART_RX);
2082                        tty_insert_flip_char(tty, ch, 0);
2083                        cnt++;
2084                }
2085                goto end_intr;
2086        }
2087intr_old:
2088
2089        do {
2090                if (max-- < 0)
2091                        break;
2092
2093                ch = inb(port->ioaddr + UART_RX);
2094                if (port->board->chip_flag && (*status & UART_LSR_OE))
2095                        outb(0x23, port->ioaddr + UART_FCR);
2096                *status &= port->read_status_mask;
2097                if (*status & port->ignore_status_mask) {
2098                        if (++ignored > 100)
2099                                break;
2100                } else {
2101                        char flag = 0;
2102                        if (*status & UART_LSR_SPECIAL) {
2103                                if (*status & UART_LSR_BI) {
2104                                        flag = TTY_BREAK;
2105                                        port->icount.brk++;
2106
2107                                        if (port->port.flags & ASYNC_SAK)
2108                                                do_SAK(tty);
2109                                } else if (*status & UART_LSR_PE) {
2110                                        flag = TTY_PARITY;
2111                                        port->icount.parity++;
2112                                } else if (*status & UART_LSR_FE) {
2113                                        flag = TTY_FRAME;
2114                                        port->icount.frame++;
2115                                } else if (*status & UART_LSR_OE) {
2116                                        flag = TTY_OVERRUN;
2117                                        port->icount.overrun++;
2118                                } else
2119                                        flag = TTY_BREAK;
2120                        }
2121                        tty_insert_flip_char(tty, ch, flag);
2122                        cnt++;
2123                        if (cnt >= recv_room) {
2124                                if (!port->ldisc_stop_rx)
2125                                        mxser_stoprx(tty);
2126                                break;
2127                        }
2128
2129                }
2130
2131                if (port->board->chip_flag)
2132                        break;
2133
2134                *status = inb(port->ioaddr + UART_LSR);
2135        } while (*status & UART_LSR_DR);
2136
2137end_intr:
2138        mxvar_log.rxcnt[tty->index] += cnt;
2139        port->mon_data.rxcnt += cnt;
2140        port->mon_data.up_rxcnt += cnt;
2141
2142        /*
2143         * We are called from an interrupt context with &port->slock
2144         * being held. Drop it temporarily in order to prevent
2145         * recursive locking.
2146         */
2147        spin_unlock(&port->slock);
2148        tty_flip_buffer_push(tty);
2149        spin_lock(&port->slock);
2150}
2151
2152static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2153{
2154        int count, cnt;
2155
2156        if (port->x_char) {
2157                outb(port->x_char, port->ioaddr + UART_TX);
2158                port->x_char = 0;
2159                mxvar_log.txcnt[tty->index]++;
2160                port->mon_data.txcnt++;
2161                port->mon_data.up_txcnt++;
2162                port->icount.tx++;
2163                return;
2164        }
2165
2166        if (port->port.xmit_buf == NULL)
2167                return;
2168
2169        if (port->xmit_cnt <= 0 || tty->stopped ||
2170                        (tty->hw_stopped &&
2171                        (port->type != PORT_16550A) &&
2172                        (!port->board->chip_flag))) {
2173                port->IER &= ~UART_IER_THRI;
2174                outb(port->IER, port->ioaddr + UART_IER);
2175                return;
2176        }
2177
2178        cnt = port->xmit_cnt;
2179        count = port->xmit_fifo_size;
2180        do {
2181                outb(port->port.xmit_buf[port->xmit_tail++],
2182                        port->ioaddr + UART_TX);
2183                port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2184                if (--port->xmit_cnt <= 0)
2185                        break;
2186        } while (--count > 0);
2187        mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2188
2189        port->mon_data.txcnt += (cnt - port->xmit_cnt);
2190        port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2191        port->icount.tx += (cnt - port->xmit_cnt);
2192
2193        if (port->xmit_cnt < WAKEUP_CHARS)
2194                tty_wakeup(tty);
2195
2196        if (port->xmit_cnt <= 0) {
2197                port->IER &= ~UART_IER_THRI;
2198                outb(port->IER, port->ioaddr + UART_IER);
2199        }
2200}
2201
2202/*
2203 * This is the serial driver's generic interrupt routine
2204 */
2205static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2206{
2207        int status, iir, i;
2208        struct mxser_board *brd = NULL;
2209        struct mxser_port *port;
2210        int max, irqbits, bits, msr;
2211        unsigned int int_cnt, pass_counter = 0;
2212        int handled = IRQ_NONE;
2213        struct tty_struct *tty;
2214
2215        for (i = 0; i < MXSER_BOARDS; i++)
2216                if (dev_id == &mxser_boards[i]) {
2217                        brd = dev_id;
2218                        break;
2219                }
2220
2221        if (i == MXSER_BOARDS)
2222                goto irq_stop;
2223        if (brd == NULL)
2224                goto irq_stop;
2225        max = brd->info->nports;
2226        while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2227                irqbits = inb(brd->vector) & brd->vector_mask;
2228                if (irqbits == brd->vector_mask)
2229                        break;
2230
2231                handled = IRQ_HANDLED;
2232                for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2233                        if (irqbits == brd->vector_mask)
2234                                break;
2235                        if (bits & irqbits)
2236                                continue;
2237                        port = &brd->ports[i];
2238
2239                        int_cnt = 0;
2240                        spin_lock(&port->slock);
2241                        do {
2242                                iir = inb(port->ioaddr + UART_IIR);
2243                                if (iir & UART_IIR_NO_INT)
2244                                        break;
2245                                iir &= MOXA_MUST_IIR_MASK;
2246                                tty = tty_port_tty_get(&port->port);
2247                                if (!tty ||
2248                                                (port->port.flags & ASYNC_CLOSING) ||
2249                                                !(port->port.flags &
2250                                                        ASYNC_INITIALIZED)) {
2251                                        status = inb(port->ioaddr + UART_LSR);
2252                                        outb(0x27, port->ioaddr + UART_FCR);
2253                                        inb(port->ioaddr + UART_MSR);
2254                                        tty_kref_put(tty);
2255                                        break;
2256                                }
2257
2258                                status = inb(port->ioaddr + UART_LSR);
2259
2260                                if (status & UART_LSR_PE)
2261                                        port->err_shadow |= NPPI_NOTIFY_PARITY;
2262                                if (status & UART_LSR_FE)
2263                                        port->err_shadow |= NPPI_NOTIFY_FRAMING;
2264                                if (status & UART_LSR_OE)
2265                                        port->err_shadow |=
2266                                                NPPI_NOTIFY_HW_OVERRUN;
2267                                if (status & UART_LSR_BI)
2268                                        port->err_shadow |= NPPI_NOTIFY_BREAK;
2269
2270                                if (port->board->chip_flag) {
2271                                        if (iir == MOXA_MUST_IIR_GDA ||
2272                                            iir == MOXA_MUST_IIR_RDA ||
2273                                            iir == MOXA_MUST_IIR_RTO ||
2274                                            iir == MOXA_MUST_IIR_LSR)
2275                                                mxser_receive_chars(tty, port,
2276                                                                &status);
2277
2278                                } else {
2279                                        status &= port->read_status_mask;
2280                                        if (status & UART_LSR_DR)
2281                                                mxser_receive_chars(tty, port,
2282                                                                &status);
2283                                }
2284                                msr = inb(port->ioaddr + UART_MSR);
2285                                if (msr & UART_MSR_ANY_DELTA)
2286                                        mxser_check_modem_status(tty, port, msr);
2287
2288                                if (port->board->chip_flag) {
2289                                        if (iir == 0x02 && (status &
2290                                                                UART_LSR_THRE))
2291                                                mxser_transmit_chars(tty, port);
2292                                } else {
2293                                        if (status & UART_LSR_THRE)
2294                                                mxser_transmit_chars(tty, port);
2295                                }
2296                                tty_kref_put(tty);
2297                        } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2298                        spin_unlock(&port->slock);
2299                }
2300        }
2301
2302irq_stop:
2303        return handled;
2304}
2305
2306static const struct tty_operations mxser_ops = {
2307        .open = mxser_open,
2308        .close = mxser_close,
2309        .write = mxser_write,
2310        .put_char = mxser_put_char,
2311        .flush_chars = mxser_flush_chars,
2312        .write_room = mxser_write_room,
2313        .chars_in_buffer = mxser_chars_in_buffer,
2314        .flush_buffer = mxser_flush_buffer,
2315        .ioctl = mxser_ioctl,
2316        .throttle = mxser_throttle,
2317        .unthrottle = mxser_unthrottle,
2318        .set_termios = mxser_set_termios,
2319        .stop = mxser_stop,
2320        .start = mxser_start,
2321        .hangup = mxser_hangup,
2322        .break_ctl = mxser_rs_break,
2323        .wait_until_sent = mxser_wait_until_sent,
2324        .tiocmget = mxser_tiocmget,
2325        .tiocmset = mxser_tiocmset,
2326        .get_icount = mxser_get_icount,
2327};
2328
2329static struct tty_port_operations mxser_port_ops = {
2330        .carrier_raised = mxser_carrier_raised,
2331        .dtr_rts = mxser_dtr_rts,
2332        .activate = mxser_activate,
2333        .shutdown = mxser_shutdown_port,
2334};
2335
2336/*
2337 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2338 */
2339
2340static void mxser_release_ISA_res(struct mxser_board *brd)
2341{
2342        free_irq(brd->irq, brd);
2343        release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2344        release_region(brd->vector, 1);
2345}
2346
2347static int __devinit mxser_initbrd(struct mxser_board *brd,
2348                struct pci_dev *pdev)
2349{
2350        struct mxser_port *info;
2351        unsigned int i;
2352        int retval;
2353
2354        printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2355                        brd->ports[0].max_baud);
2356
2357        for (i = 0; i < brd->info->nports; i++) {
2358                info = &brd->ports[i];
2359                tty_port_init(&info->port);
2360                info->port.ops = &mxser_port_ops;
2361                info->board = brd;
2362                info->stop_rx = 0;
2363                info->ldisc_stop_rx = 0;
2364
2365                /* Enhance mode enabled here */
2366                if (brd->chip_flag != MOXA_OTHER_UART)
2367                        mxser_enable_must_enchance_mode(info->ioaddr);
2368
2369                info->port.flags = ASYNC_SHARE_IRQ;
2370                info->type = brd->uart_type;
2371
2372                process_txrx_fifo(info);
2373
2374                info->custom_divisor = info->baud_base * 16;
2375                info->port.close_delay = 5 * HZ / 10;
2376                info->port.closing_wait = 30 * HZ;
2377                info->normal_termios = mxvar_sdriver->init_termios;
2378                memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2379                info->err_shadow = 0;
2380                spin_lock_init(&info->slock);
2381
2382                /* before set INT ISR, disable all int */
2383                outb(inb(info->ioaddr + UART_IER) & 0xf0,
2384                        info->ioaddr + UART_IER);
2385        }
2386
2387        retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2388                        brd);
2389        if (retval)
2390                printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2391                        "conflict with another device.\n",
2392                        brd->info->name, brd->irq);
2393
2394        return retval;
2395}
2396
2397static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2398{
2399        int id, i, bits;
2400        unsigned short regs[16], irq;
2401        unsigned char scratch, scratch2;
2402
2403        brd->chip_flag = MOXA_OTHER_UART;
2404
2405        id = mxser_read_register(cap, regs);
2406        switch (id) {
2407        case C168_ASIC_ID:
2408                brd->info = &mxser_cards[0];
2409                break;
2410        case C104_ASIC_ID:
2411                brd->info = &mxser_cards[1];
2412                break;
2413        case CI104J_ASIC_ID:
2414                brd->info = &mxser_cards[2];
2415                break;
2416        case C102_ASIC_ID:
2417                brd->info = &mxser_cards[5];
2418                break;
2419        case CI132_ASIC_ID:
2420                brd->info = &mxser_cards[6];
2421                break;
2422        case CI134_ASIC_ID:
2423                brd->info = &mxser_cards[7];
2424                break;
2425        default:
2426                return 0;
2427        }
2428
2429        irq = 0;
2430        /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2431           Flag-hack checks if configuration should be read as 2-port here. */
2432        if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2433                irq = regs[9] & 0xF000;
2434                irq = irq | (irq >> 4);
2435                if (irq != (regs[9] & 0xFF00))
2436                        goto err_irqconflict;
2437        } else if (brd->info->nports == 4) {
2438                irq = regs[9] & 0xF000;
2439                irq = irq | (irq >> 4);
2440                irq = irq | (irq >> 8);
2441                if (irq != regs[9])
2442                        goto err_irqconflict;
2443        } else if (brd->info->nports == 8) {
2444                irq = regs[9] & 0xF000;
2445                irq = irq | (irq >> 4);
2446                irq = irq | (irq >> 8);
2447                if ((irq != regs[9]) || (irq != regs[10]))
2448                        goto err_irqconflict;
2449        }
2450
2451        if (!irq) {
2452                printk(KERN_ERR "mxser: interrupt number unset\n");
2453                return -EIO;
2454        }
2455        brd->irq = ((int)(irq & 0xF000) >> 12);
2456        for (i = 0; i < 8; i++)
2457                brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2458        if ((regs[12] & 0x80) == 0) {
2459                printk(KERN_ERR "mxser: invalid interrupt vector\n");
2460                return -EIO;
2461        }
2462        brd->vector = (int)regs[11];    /* interrupt vector */
2463        if (id == 1)
2464                brd->vector_mask = 0x00FF;
2465        else
2466                brd->vector_mask = 0x000F;
2467        for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2468                if (regs[12] & bits) {
2469                        brd->ports[i].baud_base = 921600;
2470                        brd->ports[i].max_baud = 921600;
2471                } else {
2472                        brd->ports[i].baud_base = 115200;
2473                        brd->ports[i].max_baud = 115200;
2474                }
2475        }
2476        scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2477        outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2478        outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2479        outb(scratch2, cap + UART_LCR);
2480        outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2481        scratch = inb(cap + UART_IIR);
2482
2483        if (scratch & 0xC0)
2484                brd->uart_type = PORT_16550A;
2485        else
2486                brd->uart_type = PORT_16450;
2487        if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2488                        "mxser(IO)")) {
2489                printk(KERN_ERR "mxser: can't request ports I/O region: "
2490                                "0x%.8lx-0x%.8lx\n",
2491                                brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2492                                8 * brd->info->nports - 1);
2493                return -EIO;
2494        }
2495        if (!request_region(brd->vector, 1, "mxser(vector)")) {
2496                release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2497                printk(KERN_ERR "mxser: can't request interrupt vector region: "
2498                                "0x%.8lx-0x%.8lx\n",
2499                                brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2500                                8 * brd->info->nports - 1);
2501                return -EIO;
2502        }
2503        return brd->info->nports;
2504
2505err_irqconflict:
2506        printk(KERN_ERR "mxser: invalid interrupt number\n");
2507        return -EIO;
2508}
2509
2510static int __devinit mxser_probe(struct pci_dev *pdev,
2511                const struct pci_device_id *ent)
2512{
2513#ifdef CONFIG_PCI
2514        struct mxser_board *brd;
2515        unsigned int i, j;
2516        unsigned long ioaddress;
2517        int retval = -EINVAL;
2518
2519        for (i = 0; i < MXSER_BOARDS; i++)
2520                if (mxser_boards[i].info == NULL)
2521                        break;
2522
2523        if (i >= MXSER_BOARDS) {
2524                dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2525                                "not configured\n", MXSER_BOARDS);
2526                goto err;
2527        }
2528
2529        brd = &mxser_boards[i];
2530        brd->idx = i * MXSER_PORTS_PER_BOARD;
2531        dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2532                mxser_cards[ent->driver_data].name,
2533                pdev->bus->number, PCI_SLOT(pdev->devfn));
2534
2535        retval = pci_enable_device(pdev);
2536        if (retval) {
2537                dev_err(&pdev->dev, "PCI enable failed\n");
2538                goto err;
2539        }
2540
2541        /* io address */
2542        ioaddress = pci_resource_start(pdev, 2);
2543        retval = pci_request_region(pdev, 2, "mxser(IO)");
2544        if (retval)
2545                goto err_dis;
2546
2547        brd->info = &mxser_cards[ent->driver_data];
2548        for (i = 0; i < brd->info->nports; i++)
2549                brd->ports[i].ioaddr = ioaddress + 8 * i;
2550
2551        /* vector */
2552        ioaddress = pci_resource_start(pdev, 3);
2553        retval = pci_request_region(pdev, 3, "mxser(vector)");
2554        if (retval)
2555                goto err_zero;
2556        brd->vector = ioaddress;
2557
2558        /* irq */
2559        brd->irq = pdev->irq;
2560
2561        brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2562        brd->uart_type = PORT_16550A;
2563        brd->vector_mask = 0;
2564
2565        for (i = 0; i < brd->info->nports; i++) {
2566                for (j = 0; j < UART_INFO_NUM; j++) {
2567                        if (Gpci_uart_info[j].type == brd->chip_flag) {
2568                                brd->ports[i].max_baud =
2569                                        Gpci_uart_info[j].max_baud;
2570
2571                                /* exception....CP-102 */
2572                                if (brd->info->flags & MXSER_HIGHBAUD)
2573                                        brd->ports[i].max_baud = 921600;
2574                                break;
2575                        }
2576                }
2577        }
2578
2579        if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2580                for (i = 0; i < brd->info->nports; i++) {
2581                        if (i < 4)
2582                                brd->ports[i].opmode_ioaddr = ioaddress + 4;
2583                        else
2584                                brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2585                }
2586                outb(0, ioaddress + 4); /* default set to RS232 mode */
2587                outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2588        }
2589
2590        for (i = 0; i < brd->info->nports; i++) {
2591                brd->vector_mask |= (1 << i);
2592                brd->ports[i].baud_base = 921600;
2593        }
2594
2595        /* mxser_initbrd will hook ISR. */
2596        retval = mxser_initbrd(brd, pdev);
2597        if (retval)
2598                goto err_rel3;
2599
2600        for (i = 0; i < brd->info->nports; i++)
2601                tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2602
2603        pci_set_drvdata(pdev, brd);
2604
2605        return 0;
2606err_rel3:
2607        pci_release_region(pdev, 3);
2608err_zero:
2609        brd->info = NULL;
2610        pci_release_region(pdev, 2);
2611err_dis:
2612        pci_disable_device(pdev);
2613err:
2614        return retval;
2615#else
2616        return -ENODEV;
2617#endif
2618}
2619
2620static void __devexit mxser_remove(struct pci_dev *pdev)
2621{
2622#ifdef CONFIG_PCI
2623        struct mxser_board *brd = pci_get_drvdata(pdev);
2624        unsigned int i;
2625
2626        for (i = 0; i < brd->info->nports; i++)
2627                tty_unregister_device(mxvar_sdriver, brd->idx + i);
2628
2629        free_irq(pdev->irq, brd);
2630        pci_release_region(pdev, 2);
2631        pci_release_region(pdev, 3);
2632        pci_disable_device(pdev);
2633        brd->info = NULL;
2634#endif
2635}
2636
2637static struct pci_driver mxser_driver = {
2638        .name = "mxser",
2639        .id_table = mxser_pcibrds,
2640        .probe = mxser_probe,
2641        .remove = __devexit_p(mxser_remove)
2642};
2643
2644static int __init mxser_module_init(void)
2645{
2646        struct mxser_board *brd;
2647        unsigned int b, i, m;
2648        int retval;
2649
2650        mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2651        if (!mxvar_sdriver)
2652                return -ENOMEM;
2653
2654        printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2655                MXSER_VERSION);
2656
2657        /* Initialize the tty_driver structure */
2658        mxvar_sdriver->name = "ttyMI";
2659        mxvar_sdriver->major = ttymajor;
2660        mxvar_sdriver->minor_start = 0;
2661        mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2662        mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2663        mxvar_sdriver->init_termios = tty_std_termios;
2664        mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2665        mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2666        tty_set_operations(mxvar_sdriver, &mxser_ops);
2667
2668        retval = tty_register_driver(mxvar_sdriver);
2669        if (retval) {
2670                printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2671                                "tty driver !\n");
2672                goto err_put;
2673        }
2674
2675        /* Start finding ISA boards here */
2676        for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2677                if (!ioaddr[b])
2678                        continue;
2679
2680                brd = &mxser_boards[m];
2681                retval = mxser_get_ISA_conf(ioaddr[b], brd);
2682                if (retval <= 0) {
2683                        brd->info = NULL;
2684                        continue;
2685                }
2686
2687                printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2688                                brd->info->name, ioaddr[b]);
2689
2690                /* mxser_initbrd will hook ISR. */
2691                if (mxser_initbrd(brd, NULL) < 0) {
2692                        brd->info = NULL;
2693                        continue;
2694                }
2695
2696                brd->idx = m * MXSER_PORTS_PER_BOARD;
2697                for (i = 0; i < brd->info->nports; i++)
2698                        tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2699
2700                m++;
2701        }
2702
2703        retval = pci_register_driver(&mxser_driver);
2704        if (retval) {
2705                printk(KERN_ERR "mxser: can't register pci driver\n");
2706                if (!m) {
2707                        retval = -ENODEV;
2708                        goto err_unr;
2709                } /* else: we have some ISA cards under control */
2710        }
2711
2712        return 0;
2713err_unr:
2714        tty_unregister_driver(mxvar_sdriver);
2715err_put:
2716        put_tty_driver(mxvar_sdriver);
2717        return retval;
2718}
2719
2720static void __exit mxser_module_exit(void)
2721{
2722        unsigned int i, j;
2723
2724        pci_unregister_driver(&mxser_driver);
2725
2726        for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2727                if (mxser_boards[i].info != NULL)
2728                        for (j = 0; j < mxser_boards[i].info->nports; j++)
2729                                tty_unregister_device(mxvar_sdriver,
2730                                                mxser_boards[i].idx + j);
2731        tty_unregister_driver(mxvar_sdriver);
2732        put_tty_driver(mxvar_sdriver);
2733
2734        for (i = 0; i < MXSER_BOARDS; i++)
2735                if (mxser_boards[i].info != NULL)
2736                        mxser_release_ISA_res(&mxser_boards[i]);
2737}
2738
2739module_init(mxser_module_init);
2740module_exit(mxser_module_exit);
2741
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