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 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 (tty_port_cts_enabled(&port->port)) {
 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        if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1088                if (C_HUPCL(tty))
1089                        tty_port_lower_dtr_rts(port);
1090        }
1091        mxser_shutdown_port(port);
1092        clear_bit(ASYNCB_INITIALIZED, &port->flags);
1093        mutex_unlock(&port->mutex);
1094        /* Right now the tty_port set is done outside of the close_end helper
1095           as we don't yet have everyone using refcounts */     
1096        tty_port_close_end(port, tty);
1097        tty_port_tty_set(port, NULL);
1098}
1099
1100static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1101{
1102        int c, total = 0;
1103        struct mxser_port *info = tty->driver_data;
1104        unsigned long flags;
1105
1106        if (!info->port.xmit_buf)
1107                return 0;
1108
1109        while (1) {
1110                c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1111                                          SERIAL_XMIT_SIZE - info->xmit_head));
1112                if (c <= 0)
1113                        break;
1114
1115                memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1116                spin_lock_irqsave(&info->slock, flags);
1117                info->xmit_head = (info->xmit_head + c) &
1118                                  (SERIAL_XMIT_SIZE - 1);
1119                info->xmit_cnt += c;
1120                spin_unlock_irqrestore(&info->slock, flags);
1121
1122                buf += c;
1123                count -= c;
1124                total += c;
1125        }
1126
1127        if (info->xmit_cnt && !tty->stopped) {
1128                if (!tty->hw_stopped ||
1129                                (info->type == PORT_16550A) ||
1130                                (info->board->chip_flag)) {
1131                        spin_lock_irqsave(&info->slock, flags);
1132                        outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1133                                        UART_IER);
1134                        info->IER |= UART_IER_THRI;
1135                        outb(info->IER, info->ioaddr + UART_IER);
1136                        spin_unlock_irqrestore(&info->slock, flags);
1137                }
1138        }
1139        return total;
1140}
1141
1142static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1143{
1144        struct mxser_port *info = tty->driver_data;
1145        unsigned long flags;
1146
1147        if (!info->port.xmit_buf)
1148                return 0;
1149
1150        if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1151                return 0;
1152
1153        spin_lock_irqsave(&info->slock, flags);
1154        info->port.xmit_buf[info->xmit_head++] = ch;
1155        info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1156        info->xmit_cnt++;
1157        spin_unlock_irqrestore(&info->slock, flags);
1158        if (!tty->stopped) {
1159                if (!tty->hw_stopped ||
1160                                (info->type == PORT_16550A) ||
1161                                info->board->chip_flag) {
1162                        spin_lock_irqsave(&info->slock, flags);
1163                        outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1164                        info->IER |= UART_IER_THRI;
1165                        outb(info->IER, info->ioaddr + UART_IER);
1166                        spin_unlock_irqrestore(&info->slock, flags);
1167                }
1168        }
1169        return 1;
1170}
1171
1172
1173static void mxser_flush_chars(struct tty_struct *tty)
1174{
1175        struct mxser_port *info = tty->driver_data;
1176        unsigned long flags;
1177
1178        if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1179                        (tty->hw_stopped && info->type != PORT_16550A &&
1180                         !info->board->chip_flag))
1181                return;
1182
1183        spin_lock_irqsave(&info->slock, flags);
1184
1185        outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1186        info->IER |= UART_IER_THRI;
1187        outb(info->IER, info->ioaddr + UART_IER);
1188
1189        spin_unlock_irqrestore(&info->slock, flags);
1190}
1191
1192static int mxser_write_room(struct tty_struct *tty)
1193{
1194        struct mxser_port *info = tty->driver_data;
1195        int ret;
1196
1197        ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1198        return ret < 0 ? 0 : ret;
1199}
1200
1201static int mxser_chars_in_buffer(struct tty_struct *tty)
1202{
1203        struct mxser_port *info = tty->driver_data;
1204        return info->xmit_cnt;
1205}
1206
1207/*
1208 * ------------------------------------------------------------
1209 * friends of mxser_ioctl()
1210 * ------------------------------------------------------------
1211 */
1212static int mxser_get_serial_info(struct tty_struct *tty,
1213                struct serial_struct __user *retinfo)
1214{
1215        struct mxser_port *info = tty->driver_data;
1216        struct serial_struct tmp = {
1217                .type = info->type,
1218                .line = tty->index,
1219                .port = info->ioaddr,
1220                .irq = info->board->irq,
1221                .flags = info->port.flags,
1222                .baud_base = info->baud_base,
1223                .close_delay = info->port.close_delay,
1224                .closing_wait = info->port.closing_wait,
1225                .custom_divisor = info->custom_divisor,
1226                .hub6 = 0
1227        };
1228        if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1229                return -EFAULT;
1230        return 0;
1231}
1232
1233static int mxser_set_serial_info(struct tty_struct *tty,
1234                struct serial_struct __user *new_info)
1235{
1236        struct mxser_port *info = tty->driver_data;
1237        struct tty_port *port = &info->port;
1238        struct serial_struct new_serial;
1239        speed_t baud;
1240        unsigned long sl_flags;
1241        unsigned int flags;
1242        int retval = 0;
1243
1244        if (!new_info || !info->ioaddr)
1245                return -ENODEV;
1246        if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1247                return -EFAULT;
1248
1249        if (new_serial.irq != info->board->irq ||
1250                        new_serial.port != info->ioaddr)
1251                return -EINVAL;
1252
1253        flags = port->flags & ASYNC_SPD_MASK;
1254
1255        if (!capable(CAP_SYS_ADMIN)) {
1256                if ((new_serial.baud_base != info->baud_base) ||
1257                                (new_serial.close_delay != info->port.close_delay) ||
1258                                ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1259                        return -EPERM;
1260                info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1261                                (new_serial.flags & ASYNC_USR_MASK));
1262        } else {
1263                /*
1264                 * OK, past this point, all the error checking has been done.
1265                 * At this point, we start making changes.....
1266                 */
1267                port->flags = ((port->flags & ~ASYNC_FLAGS) |
1268                                (new_serial.flags & ASYNC_FLAGS));
1269                port->close_delay = new_serial.close_delay * HZ / 100;
1270                port->closing_wait = new_serial.closing_wait * HZ / 100;
1271                port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1272                if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1273                                (new_serial.baud_base != info->baud_base ||
1274                                new_serial.custom_divisor !=
1275                                info->custom_divisor)) {
1276                        if (new_serial.custom_divisor == 0)
1277                                return -EINVAL;
1278                        baud = new_serial.baud_base / new_serial.custom_divisor;
1279                        tty_encode_baud_rate(tty, baud, baud);
1280                }
1281        }
1282
1283        info->type = new_serial.type;
1284
1285        process_txrx_fifo(info);
1286
1287        if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1288                if (flags != (port->flags & ASYNC_SPD_MASK)) {
1289                        spin_lock_irqsave(&info->slock, sl_flags);
1290                        mxser_change_speed(tty, NULL);
1291                        spin_unlock_irqrestore(&info->slock, sl_flags);
1292                }
1293        } else {
1294                retval = mxser_activate(port, tty);
1295                if (retval == 0)
1296                        set_bit(ASYNCB_INITIALIZED, &port->flags);
1297        }
1298        return retval;
1299}
1300
1301/*
1302 * mxser_get_lsr_info - get line status register info
1303 *
1304 * Purpose: Let user call ioctl() to get info when the UART physically
1305 *          is emptied.  On bus types like RS485, the transmitter must
1306 *          release the bus after transmitting. This must be done when
1307 *          the transmit shift register is empty, not be done when the
1308 *          transmit holding register is empty.  This functionality
1309 *          allows an RS485 driver to be written in user space.
1310 */
1311static int mxser_get_lsr_info(struct mxser_port *info,
1312                unsigned int __user *value)
1313{
1314        unsigned char status;
1315        unsigned int result;
1316        unsigned long flags;
1317
1318        spin_lock_irqsave(&info->slock, flags);
1319        status = inb(info->ioaddr + UART_LSR);
1320        spin_unlock_irqrestore(&info->slock, flags);
1321        result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1322        return put_user(result, value);
1323}
1324
1325static int mxser_tiocmget(struct tty_struct *tty)
1326{
1327        struct mxser_port *info = tty->driver_data;
1328        unsigned char control, status;
1329        unsigned long flags;
1330
1331
1332        if (tty->index == MXSER_PORTS)
1333                return -ENOIOCTLCMD;
1334        if (test_bit(TTY_IO_ERROR, &tty->flags))
1335                return -EIO;
1336
1337        control = info->MCR;
1338
1339        spin_lock_irqsave(&info->slock, flags);
1340        status = inb(info->ioaddr + UART_MSR);
1341        if (status & UART_MSR_ANY_DELTA)
1342                mxser_check_modem_status(tty, info, status);
1343        spin_unlock_irqrestore(&info->slock, flags);
1344        return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1345                    ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1346                    ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1347                    ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1348                    ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1349                    ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1350}
1351
1352static int mxser_tiocmset(struct tty_struct *tty,
1353                unsigned int set, unsigned int clear)
1354{
1355        struct mxser_port *info = tty->driver_data;
1356        unsigned long flags;
1357
1358
1359        if (tty->index == MXSER_PORTS)
1360                return -ENOIOCTLCMD;
1361        if (test_bit(TTY_IO_ERROR, &tty->flags))
1362                return -EIO;
1363
1364        spin_lock_irqsave(&info->slock, flags);
1365
1366        if (set & TIOCM_RTS)
1367                info->MCR |= UART_MCR_RTS;
1368        if (set & TIOCM_DTR)
1369                info->MCR |= UART_MCR_DTR;
1370
1371        if (clear & TIOCM_RTS)
1372                info->MCR &= ~UART_MCR_RTS;
1373        if (clear & TIOCM_DTR)
1374                info->MCR &= ~UART_MCR_DTR;
1375
1376        outb(info->MCR, info->ioaddr + UART_MCR);
1377        spin_unlock_irqrestore(&info->slock, flags);
1378        return 0;
1379}
1380
1381static int __init mxser_program_mode(int port)
1382{
1383        int id, i, j, n;
1384
1385        outb(0, port);
1386        outb(0, port);
1387        outb(0, port);
1388        (void)inb(port);
1389        (void)inb(port);
1390        outb(0, port);
1391        (void)inb(port);
1392
1393        id = inb(port + 1) & 0x1F;
1394        if ((id != C168_ASIC_ID) &&
1395                        (id != C104_ASIC_ID) &&
1396                        (id != C102_ASIC_ID) &&
1397                        (id != CI132_ASIC_ID) &&
1398                        (id != CI134_ASIC_ID) &&
1399                        (id != CI104J_ASIC_ID))
1400                return -1;
1401        for (i = 0, j = 0; i < 4; i++) {
1402                n = inb(port + 2);
1403                if (n == 'M') {
1404                        j = 1;
1405                } else if ((j == 1) && (n == 1)) {
1406                        j = 2;
1407                        break;
1408                } else
1409                        j = 0;
1410        }
1411        if (j != 2)
1412                id = -2;
1413        return id;
1414}
1415
1416static void __init mxser_normal_mode(int port)
1417{
1418        int i, n;
1419
1420        outb(0xA5, port + 1);
1421        outb(0x80, port + 3);
1422        outb(12, port + 0);     /* 9600 bps */
1423        outb(0, port + 1);
1424        outb(0x03, port + 3);   /* 8 data bits */
1425        outb(0x13, port + 4);   /* loop back mode */
1426        for (i = 0; i < 16; i++) {
1427                n = inb(port + 5);
1428                if ((n & 0x61) == 0x60)
1429                        break;
1430                if ((n & 1) == 1)
1431                        (void)inb(port);
1432        }
1433        outb(0x00, port + 4);
1434}
1435
1436#define CHIP_SK         0x01    /* Serial Data Clock  in Eprom */
1437#define CHIP_DO         0x02    /* Serial Data Output in Eprom */
1438#define CHIP_CS         0x04    /* Serial Chip Select in Eprom */
1439#define CHIP_DI         0x08    /* Serial Data Input  in Eprom */
1440#define EN_CCMD         0x000   /* Chip's command register     */
1441#define EN0_RSARLO      0x008   /* Remote start address reg 0  */
1442#define EN0_RSARHI      0x009   /* Remote start address reg 1  */
1443#define EN0_RCNTLO      0x00A   /* Remote byte count reg WR    */
1444#define EN0_RCNTHI      0x00B   /* Remote byte count reg WR    */
1445#define EN0_DCFG        0x00E   /* Data configuration reg WR   */
1446#define EN0_PORT        0x010   /* Rcv missed frame error counter RD */
1447#define ENC_PAGE0       0x000   /* Select page 0 of chip registers   */
1448#define ENC_PAGE3       0x0C0   /* Select page 3 of chip registers   */
1449static int __init mxser_read_register(int port, unsigned short *regs)
1450{
1451        int i, k, value, id;
1452        unsigned int j;
1453
1454        id = mxser_program_mode(port);
1455        if (id < 0)
1456                return id;
1457        for (i = 0; i < 14; i++) {
1458                k = (i & 0x3F) | 0x180;
1459                for (j = 0x100; j > 0; j >>= 1) {
1460                        outb(CHIP_CS, port);
1461                        if (k & j) {
1462                                outb(CHIP_CS | CHIP_DO, port);
1463                                outb(CHIP_CS | CHIP_DO | CHIP_SK, port);        /* A? bit of read */
1464                        } else {
1465                                outb(CHIP_CS, port);
1466                                outb(CHIP_CS | CHIP_SK, port);  /* A? bit of read */
1467                        }
1468                }
1469                (void)inb(port);
1470                value = 0;
1471                for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1472                        outb(CHIP_CS, port);
1473                        outb(CHIP_CS | CHIP_SK, port);
1474                        if (inb(port) & CHIP_DI)
1475                                value |= j;
1476                }
1477                regs[i] = value;
1478                outb(0, port);
1479        }
1480        mxser_normal_mode(port);
1481        return id;
1482}
1483
1484static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1485{
1486        struct mxser_port *ip;
1487        struct tty_port *port;
1488        struct tty_struct *tty;
1489        int result, status;
1490        unsigned int i, j;
1491        int ret = 0;
1492
1493        switch (cmd) {
1494        case MOXA_GET_MAJOR:
1495                printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1496                                        "%x (GET_MAJOR), fix your userspace\n",
1497                                        current->comm, cmd);
1498                return put_user(ttymajor, (int __user *)argp);
1499
1500        case MOXA_CHKPORTENABLE:
1501                result = 0;
1502                for (i = 0; i < MXSER_BOARDS; i++)
1503                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1504                                if (mxser_boards[i].ports[j].ioaddr)
1505                                        result |= (1 << i);
1506                return put_user(result, (unsigned long __user *)argp);
1507        case MOXA_GETDATACOUNT:
1508                /* The receive side is locked by port->slock but it isn't
1509                   clear that an exact snapshot is worth copying here */
1510                if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1511                        ret = -EFAULT;
1512                return ret;
1513        case MOXA_GETMSTATUS: {
1514                struct mxser_mstatus ms, __user *msu = argp;
1515                for (i = 0; i < MXSER_BOARDS; i++)
1516                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1517                                ip = &mxser_boards[i].ports[j];
1518                                port = &ip->port;
1519                                memset(&ms, 0, sizeof(ms));
1520
1521                                mutex_lock(&port->mutex);
1522                                if (!ip->ioaddr)
1523                                        goto copy;
1524                                
1525                                tty = tty_port_tty_get(port);
1526
1527                                if (!tty)
1528                                        ms.cflag = ip->normal_termios.c_cflag;
1529                                else
1530                                        ms.cflag = tty->termios.c_cflag;
1531                                tty_kref_put(tty);
1532                                spin_lock_irq(&ip->slock);
1533                                status = inb(ip->ioaddr + UART_MSR);
1534                                spin_unlock_irq(&ip->slock);
1535                                if (status & UART_MSR_DCD)
1536                                        ms.dcd = 1;
1537                                if (status & UART_MSR_DSR)
1538                                        ms.dsr = 1;
1539                                if (status & UART_MSR_CTS)
1540                                        ms.cts = 1;
1541                        copy:
1542                                mutex_unlock(&port->mutex);
1543                                if (copy_to_user(msu, &ms, sizeof(ms)))
1544                                        return -EFAULT;
1545                                msu++;
1546                        }
1547                return 0;
1548        }
1549        case MOXA_ASPP_MON_EXT: {
1550                struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1551                unsigned int cflag, iflag, p;
1552                u8 opmode;
1553
1554                me = kzalloc(sizeof(*me), GFP_KERNEL);
1555                if (!me)
1556                        return -ENOMEM;
1557
1558                for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1559                        for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1560                                if (p >= ARRAY_SIZE(me->rx_cnt)) {
1561                                        i = MXSER_BOARDS;
1562                                        break;
1563                                }
1564                                ip = &mxser_boards[i].ports[j];
1565                                port = &ip->port;
1566
1567                                mutex_lock(&port->mutex);
1568                                if (!ip->ioaddr) {
1569                                        mutex_unlock(&port->mutex);
1570                                        continue;
1571                                }
1572
1573                                spin_lock_irq(&ip->slock);
1574                                status = mxser_get_msr(ip->ioaddr, 0, p);
1575
1576                                if (status & UART_MSR_TERI)
1577                                        ip->icount.rng++;
1578                                if (status & UART_MSR_DDSR)
1579                                        ip->icount.dsr++;
1580                                if (status & UART_MSR_DDCD)
1581                                        ip->icount.dcd++;
1582                                if (status & UART_MSR_DCTS)
1583                                        ip->icount.cts++;
1584
1585                                ip->mon_data.modem_status = status;
1586                                me->rx_cnt[p] = ip->mon_data.rxcnt;
1587                                me->tx_cnt[p] = ip->mon_data.txcnt;
1588                                me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1589                                me->up_txcnt[p] = ip->mon_data.up_txcnt;
1590                                me->modem_status[p] =
1591                                        ip->mon_data.modem_status;
1592                                spin_unlock_irq(&ip->slock);
1593
1594                                tty = tty_port_tty_get(&ip->port);
1595
1596                                if (!tty) {
1597                                        cflag = ip->normal_termios.c_cflag;
1598                                        iflag = ip->normal_termios.c_iflag;
1599                                        me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1600                                } else {
1601                                        cflag = tty->termios.c_cflag;
1602                                        iflag = tty->termios.c_iflag;
1603                                        me->baudrate[p] = tty_get_baud_rate(tty);
1604                                }
1605                                tty_kref_put(tty);
1606
1607                                me->databits[p] = cflag & CSIZE;
1608                                me->stopbits[p] = cflag & CSTOPB;
1609                                me->parity[p] = cflag & (PARENB | PARODD |
1610                                                CMSPAR);
1611
1612                                if (cflag & CRTSCTS)
1613                                        me->flowctrl[p] |= 0x03;
1614
1615                                if (iflag & (IXON | IXOFF))
1616                                        me->flowctrl[p] |= 0x0C;
1617
1618                                if (ip->type == PORT_16550A)
1619                                        me->fifo[p] = 1;
1620
1621                                if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
1622                                        opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1623                                        opmode &= OP_MODE_MASK;
1624                                } else {
1625                                        opmode = RS232_MODE;
1626                                }
1627                                me->iftype[p] = opmode;
1628                                mutex_unlock(&port->mutex);
1629                        }
1630                }
1631                if (copy_to_user(argp, me, sizeof(*me)))
1632                        ret = -EFAULT;
1633                kfree(me);
1634                return ret;
1635        }
1636        default:
1637                return -ENOIOCTLCMD;
1638        }
1639        return 0;
1640}
1641
1642static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1643                struct async_icount *cprev)
1644{
1645        struct async_icount cnow;
1646        unsigned long flags;
1647        int ret;
1648
1649        spin_lock_irqsave(&info->slock, flags);
1650        cnow = info->icount;    /* atomic copy */
1651        spin_unlock_irqrestore(&info->slock, flags);
1652
1653        ret =   ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1654                ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1655                ((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1656                ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1657
1658        *cprev = cnow;
1659
1660        return ret;
1661}
1662
1663static int mxser_ioctl(struct tty_struct *tty,
1664                unsigned int cmd, unsigned long arg)
1665{
1666        struct mxser_port *info = tty->driver_data;
1667        struct tty_port *port = &info->port;
1668        struct async_icount cnow;
1669        unsigned long flags;
1670        void __user *argp = (void __user *)arg;
1671        int retval;
1672
1673        if (tty->index == MXSER_PORTS)
1674                return mxser_ioctl_special(cmd, argp);
1675
1676        if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1677                int p;
1678                unsigned long opmode;
1679                static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1680                int shiftbit;
1681                unsigned char val, mask;
1682
1683                if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
1684                        return -EFAULT;
1685
1686                p = tty->index % 4;
1687                if (cmd == MOXA_SET_OP_MODE) {
1688                        if (get_user(opmode, (int __user *) argp))
1689                                return -EFAULT;
1690                        if (opmode != RS232_MODE &&
1691                                        opmode != RS485_2WIRE_MODE &&
1692                                        opmode != RS422_MODE &&
1693                                        opmode != RS485_4WIRE_MODE)
1694                                return -EFAULT;
1695                        mask = ModeMask[p];
1696                        shiftbit = p * 2;
1697                        spin_lock_irq(&info->slock);
1698                        val = inb(info->opmode_ioaddr);
1699                        val &= mask;
1700                        val |= (opmode << shiftbit);
1701                        outb(val, info->opmode_ioaddr);
1702                        spin_unlock_irq(&info->slock);
1703                } else {
1704                        shiftbit = p * 2;
1705                        spin_lock_irq(&info->slock);
1706                        opmode = inb(info->opmode_ioaddr) >> shiftbit;
1707                        spin_unlock_irq(&info->slock);
1708                        opmode &= OP_MODE_MASK;
1709                        if (put_user(opmode, (int __user *)argp))
1710                                return -EFAULT;
1711                }
1712                return 0;
1713        }
1714
1715        if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1716                        test_bit(TTY_IO_ERROR, &tty->flags))
1717                return -EIO;
1718
1719        switch (cmd) {
1720        case TIOCGSERIAL:
1721                mutex_lock(&port->mutex);
1722                retval = mxser_get_serial_info(tty, argp);
1723                mutex_unlock(&port->mutex);
1724                return retval;
1725        case TIOCSSERIAL:
1726                mutex_lock(&port->mutex);
1727                retval = mxser_set_serial_info(tty, argp);
1728                mutex_unlock(&port->mutex);
1729                return retval;
1730        case TIOCSERGETLSR:     /* Get line status register */
1731                return  mxser_get_lsr_info(info, argp);
1732                /*
1733                 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1734                 * - mask passed in arg for lines of interest
1735                 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1736                 * Caller should use TIOCGICOUNT to see which one it was
1737                 */
1738        case TIOCMIWAIT:
1739                spin_lock_irqsave(&info->slock, flags);
1740                cnow = info->icount;    /* note the counters on entry */
1741                spin_unlock_irqrestore(&info->slock, flags);
1742
1743                return wait_event_interruptible(info->port.delta_msr_wait,
1744                                mxser_cflags_changed(info, arg, &cnow));
1745        case MOXA_HighSpeedOn:
1746                return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1747        case MOXA_SDS_RSTICOUNTER:
1748                spin_lock_irq(&info->slock);
1749                info->mon_data.rxcnt = 0;
1750                info->mon_data.txcnt = 0;
1751                spin_unlock_irq(&info->slock);
1752                return 0;
1753
1754        case MOXA_ASPP_OQUEUE:{
1755                int len, lsr;
1756
1757                len = mxser_chars_in_buffer(tty);
1758                spin_lock_irq(&info->slock);
1759                lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1760                spin_unlock_irq(&info->slock);
1761                len += (lsr ? 0 : 1);
1762
1763                return put_user(len, (int __user *)argp);
1764        }
1765        case MOXA_ASPP_MON: {
1766                int mcr, status;
1767
1768                spin_lock_irq(&info->slock);
1769                status = mxser_get_msr(info->ioaddr, 1, tty->index);
1770                mxser_check_modem_status(tty, info, status);
1771
1772                mcr = inb(info->ioaddr + UART_MCR);
1773                spin_unlock_irq(&info->slock);
1774
1775                if (mcr & MOXA_MUST_MCR_XON_FLAG)
1776                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1777                else
1778                        info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1779
1780                if (mcr & MOXA_MUST_MCR_TX_XON)
1781                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1782                else
1783                        info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1784
1785                if (tty->hw_stopped)
1786                        info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1787                else
1788                        info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1789
1790                if (copy_to_user(argp, &info->mon_data,
1791                                sizeof(struct mxser_mon)))
1792                        return -EFAULT;
1793
1794                return 0;
1795        }
1796        case MOXA_ASPP_LSTATUS: {
1797                if (put_user(info->err_shadow, (unsigned char __user *)argp))
1798                        return -EFAULT;
1799
1800                info->err_shadow = 0;
1801                return 0;
1802        }
1803        case MOXA_SET_BAUD_METHOD: {
1804                int method;
1805
1806                if (get_user(method, (int __user *)argp))
1807                        return -EFAULT;
1808                mxser_set_baud_method[tty->index] = method;
1809                return put_user(method, (int __user *)argp);
1810        }
1811        default:
1812                return -ENOIOCTLCMD;
1813        }
1814        return 0;
1815}
1816
1817        /*
1818         * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1819         * Return: write counters to the user passed counter struct
1820         * NB: both 1->0 and 0->1 transitions are counted except for
1821         *     RI where only 0->1 is counted.
1822         */
1823
1824static int mxser_get_icount(struct tty_struct *tty,
1825                struct serial_icounter_struct *icount)
1826
1827{
1828        struct mxser_port *info = tty->driver_data;
1829        struct async_icount cnow;
1830        unsigned long flags;
1831
1832        spin_lock_irqsave(&info->slock, flags);
1833        cnow = info->icount;
1834        spin_unlock_irqrestore(&info->slock, flags);
1835
1836        icount->frame = cnow.frame;
1837        icount->brk = cnow.brk;
1838        icount->overrun = cnow.overrun;
1839        icount->buf_overrun = cnow.buf_overrun;
1840        icount->parity = cnow.parity;
1841        icount->rx = cnow.rx;
1842        icount->tx = cnow.tx;
1843        icount->cts = cnow.cts;
1844        icount->dsr = cnow.dsr;
1845        icount->rng = cnow.rng;
1846        icount->dcd = cnow.dcd;
1847        return 0;
1848}
1849
1850static void mxser_stoprx(struct tty_struct *tty)
1851{
1852        struct mxser_port *info = tty->driver_data;
1853
1854        info->ldisc_stop_rx = 1;
1855        if (I_IXOFF(tty)) {
1856                if (info->board->chip_flag) {
1857                        info->IER &= ~MOXA_MUST_RECV_ISR;
1858                        outb(info->IER, info->ioaddr + UART_IER);
1859                } else {
1860                        info->x_char = STOP_CHAR(tty);
1861                        outb(0, info->ioaddr + UART_IER);
1862                        info->IER |= UART_IER_THRI;
1863                        outb(info->IER, info->ioaddr + UART_IER);
1864                }
1865        }
1866
1867        if (tty->termios.c_cflag & CRTSCTS) {
1868                info->MCR &= ~UART_MCR_RTS;
1869                outb(info->MCR, info->ioaddr + UART_MCR);
1870        }
1871}
1872
1873/*
1874 * This routine is called by the upper-layer tty layer to signal that
1875 * incoming characters should be throttled.
1876 */
1877static void mxser_throttle(struct tty_struct *tty)
1878{
1879        mxser_stoprx(tty);
1880}
1881
1882static void mxser_unthrottle(struct tty_struct *tty)
1883{
1884        struct mxser_port *info = tty->driver_data;
1885
1886        /* startrx */
1887        info->ldisc_stop_rx = 0;
1888        if (I_IXOFF(tty)) {
1889                if (info->x_char)
1890                        info->x_char = 0;
1891                else {
1892                        if (info->board->chip_flag) {
1893                                info->IER |= MOXA_MUST_RECV_ISR;
1894                                outb(info->IER, info->ioaddr + UART_IER);
1895                        } else {
1896                                info->x_char = START_CHAR(tty);
1897                                outb(0, info->ioaddr + UART_IER);
1898                                info->IER |= UART_IER_THRI;
1899                                outb(info->IER, info->ioaddr + UART_IER);
1900                        }
1901                }
1902        }
1903
1904        if (tty->termios.c_cflag & CRTSCTS) {
1905                info->MCR |= UART_MCR_RTS;
1906                outb(info->MCR, info->ioaddr + UART_MCR);
1907        }
1908}
1909
1910/*
1911 * mxser_stop() and mxser_start()
1912 *
1913 * This routines are called before setting or resetting tty->stopped.
1914 * They enable or disable transmitter interrupts, as necessary.
1915 */
1916static void mxser_stop(struct tty_struct *tty)
1917{
1918        struct mxser_port *info = tty->driver_data;
1919        unsigned long flags;
1920
1921        spin_lock_irqsave(&info->slock, flags);
1922        if (info->IER & UART_IER_THRI) {
1923                info->IER &= ~UART_IER_THRI;
1924                outb(info->IER, info->ioaddr + UART_IER);
1925        }
1926        spin_unlock_irqrestore(&info->slock, flags);
1927}
1928
1929static void mxser_start(struct tty_struct *tty)
1930{
1931        struct mxser_port *info = tty->driver_data;
1932        unsigned long flags;
1933
1934        spin_lock_irqsave(&info->slock, flags);
1935        if (info->xmit_cnt && info->port.xmit_buf) {
1936                outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1937                info->IER |= UART_IER_THRI;
1938                outb(info->IER, info->ioaddr + UART_IER);
1939        }
1940        spin_unlock_irqrestore(&info->slock, flags);
1941}
1942
1943static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1944{
1945        struct mxser_port *info = tty->driver_data;
1946        unsigned long flags;
1947
1948        spin_lock_irqsave(&info->slock, flags);
1949        mxser_change_speed(tty, old_termios);
1950        spin_unlock_irqrestore(&info->slock, flags);
1951
1952        if ((old_termios->c_cflag & CRTSCTS) &&
1953                        !(tty->termios.c_cflag & CRTSCTS)) {
1954                tty->hw_stopped = 0;
1955                mxser_start(tty);
1956        }
1957
1958        /* Handle sw stopped */
1959        if ((old_termios->c_iflag & IXON) &&
1960                        !(tty->termios.c_iflag & IXON)) {
1961                tty->stopped = 0;
1962
1963                if (info->board->chip_flag) {
1964                        spin_lock_irqsave(&info->slock, flags);
1965                        mxser_disable_must_rx_software_flow_control(
1966                                        info->ioaddr);
1967                        spin_unlock_irqrestore(&info->slock, flags);
1968                }
1969
1970                mxser_start(tty);
1971        }
1972}
1973
1974/*
1975 * mxser_wait_until_sent() --- wait until the transmitter is empty
1976 */
1977static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1978{
1979        struct mxser_port *info = tty->driver_data;
1980        unsigned long orig_jiffies, char_time;
1981        unsigned long flags;
1982        int lsr;
1983
1984        if (info->type == PORT_UNKNOWN)
1985                return;
1986
1987        if (info->xmit_fifo_size == 0)
1988                return;         /* Just in case.... */
1989
1990        orig_jiffies = jiffies;
1991        /*
1992         * Set the check interval to be 1/5 of the estimated time to
1993         * send a single character, and make it at least 1.  The check
1994         * interval should also be less than the timeout.
1995         *
1996         * Note: we have to use pretty tight timings here to satisfy
1997         * the NIST-PCTS.
1998         */
1999        char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2000        char_time = char_time / 5;
2001        if (char_time == 0)
2002                char_time = 1;
2003        if (timeout && timeout < char_time)
2004                char_time = timeout;
2005        /*
2006         * If the transmitter hasn't cleared in twice the approximate
2007         * amount of time to send the entire FIFO, it probably won't
2008         * ever clear.  This assumes the UART isn't doing flow
2009         * control, which is currently the case.  Hence, if it ever
2010         * takes longer than info->timeout, this is probably due to a
2011         * UART bug of some kind.  So, we clamp the timeout parameter at
2012         * 2*info->timeout.
2013         */
2014        if (!timeout || timeout > 2 * info->timeout)
2015                timeout = 2 * info->timeout;
2016
2017        spin_lock_irqsave(&info->slock, flags);
2018        while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2019                spin_unlock_irqrestore(&info->slock, flags);
2020                schedule_timeout_interruptible(char_time);
2021                spin_lock_irqsave(&info->slock, flags);
2022                if (signal_pending(current))
2023                        break;
2024                if (timeout && time_after(jiffies, orig_jiffies + timeout))
2025                        break;
2026        }
2027        spin_unlock_irqrestore(&info->slock, flags);
2028        set_current_state(TASK_RUNNING);
2029}
2030
2031/*
2032 * This routine is called by tty_hangup() when a hangup is signaled.
2033 */
2034static void mxser_hangup(struct tty_struct *tty)
2035{
2036        struct mxser_port *info = tty->driver_data;
2037
2038        mxser_flush_buffer(tty);
2039        tty_port_hangup(&info->port);
2040}
2041
2042/*
2043 * mxser_rs_break() --- routine which turns the break handling on or off
2044 */
2045static int mxser_rs_break(struct tty_struct *tty, int break_state)
2046{
2047        struct mxser_port *info = tty->driver_data;
2048        unsigned long flags;
2049
2050        spin_lock_irqsave(&info->slock, flags);
2051        if (break_state == -1)
2052                outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2053                        info->ioaddr + UART_LCR);
2054        else
2055                outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2056                        info->ioaddr + UART_LCR);
2057        spin_unlock_irqrestore(&info->slock, flags);
2058        return 0;
2059}
2060
2061static void mxser_receive_chars(struct tty_struct *tty,
2062                                struct mxser_port *port, int *status)
2063{
2064        unsigned char ch, gdl;
2065        int ignored = 0;
2066        int cnt = 0;
2067        int recv_room;
2068        int max = 256;
2069
2070        recv_room = tty->receive_room;
2071        if (recv_room == 0 && !port->ldisc_stop_rx)
2072                mxser_stoprx(tty);
2073        if (port->board->chip_flag != MOXA_OTHER_UART) {
2074
2075                if (*status & UART_LSR_SPECIAL)
2076                        goto intr_old;
2077                if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2078                                (*status & MOXA_MUST_LSR_RERR))
2079                        goto intr_old;
2080                if (*status & MOXA_MUST_LSR_RERR)
2081                        goto intr_old;
2082
2083                gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2084
2085                if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2086                        gdl &= MOXA_MUST_GDL_MASK;
2087                if (gdl >= recv_room) {
2088                        if (!port->ldisc_stop_rx)
2089                                mxser_stoprx(tty);
2090                }
2091                while (gdl--) {
2092                        ch = inb(port->ioaddr + UART_RX);
2093                        tty_insert_flip_char(&port->port, ch, 0);
2094                        cnt++;
2095                }
2096                goto end_intr;
2097        }
2098intr_old:
2099
2100        do {
2101                if (max-- < 0)
2102                        break;
2103
2104                ch = inb(port->ioaddr + UART_RX);
2105                if (port->board->chip_flag && (*status & UART_LSR_OE))
2106                        outb(0x23, port->ioaddr + UART_FCR);
2107                *status &= port->read_status_mask;
2108                if (*status & port->ignore_status_mask) {
2109                        if (++ignored > 100)
2110                                break;
2111                } else {
2112                        char flag = 0;
2113                        if (*status & UART_LSR_SPECIAL) {
2114                                if (*status & UART_LSR_BI) {
2115                                        flag = TTY_BREAK;
2116                                        port->icount.brk++;
2117
2118                                        if (port->port.flags & ASYNC_SAK)
2119                                                do_SAK(tty);
2120                                } else if (*status & UART_LSR_PE) {
2121                                        flag = TTY_PARITY;
2122                                        port->icount.parity++;
2123                                } else if (*status & UART_LSR_FE) {
2124                                        flag = TTY_FRAME;
2125                                        port->icount.frame++;
2126                                } else if (*status & UART_LSR_OE) {
2127                                        flag = TTY_OVERRUN;
2128                                        port->icount.overrun++;
2129                                } else
2130                                        flag = TTY_BREAK;
2131                        }
2132                        tty_insert_flip_char(&port->port, ch, flag);
2133                        cnt++;
2134                        if (cnt >= recv_room) {
2135                                if (!port->ldisc_stop_rx)
2136                                        mxser_stoprx(tty);
2137                                break;
2138                        }
2139
2140                }
2141
2142                if (port->board->chip_flag)
2143                        break;
2144
2145                *status = inb(port->ioaddr + UART_LSR);
2146        } while (*status & UART_LSR_DR);
2147
2148end_intr:
2149        mxvar_log.rxcnt[tty->index] += cnt;
2150        port->mon_data.rxcnt += cnt;
2151        port->mon_data.up_rxcnt += cnt;
2152
2153        /*
2154         * We are called from an interrupt context with &port->slock
2155         * being held. Drop it temporarily in order to prevent
2156         * recursive locking.
2157         */
2158        spin_unlock(&port->slock);
2159        tty_flip_buffer_push(&port->port);
2160        spin_lock(&port->slock);
2161}
2162
2163static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2164{
2165        int count, cnt;
2166
2167        if (port->x_char) {
2168                outb(port->x_char, port->ioaddr + UART_TX);
2169                port->x_char = 0;
2170                mxvar_log.txcnt[tty->index]++;
2171                port->mon_data.txcnt++;
2172                port->mon_data.up_txcnt++;
2173                port->icount.tx++;
2174                return;
2175        }
2176
2177        if (port->port.xmit_buf == NULL)
2178                return;
2179
2180        if (port->xmit_cnt <= 0 || tty->stopped ||
2181                        (tty->hw_stopped &&
2182                        (port->type != PORT_16550A) &&
2183                        (!port->board->chip_flag))) {
2184                port->IER &= ~UART_IER_THRI;
2185                outb(port->IER, port->ioaddr + UART_IER);
2186                return;
2187        }
2188
2189        cnt = port->xmit_cnt;
2190        count = port->xmit_fifo_size;
2191        do {
2192                outb(port->port.xmit_buf[port->xmit_tail++],
2193                        port->ioaddr + UART_TX);
2194                port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2195                if (--port->xmit_cnt <= 0)
2196                        break;
2197        } while (--count > 0);
2198        mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2199
2200        port->mon_data.txcnt += (cnt - port->xmit_cnt);
2201        port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2202        port->icount.tx += (cnt - port->xmit_cnt);
2203
2204        if (port->xmit_cnt < WAKEUP_CHARS)
2205                tty_wakeup(tty);
2206
2207        if (port->xmit_cnt <= 0) {
2208                port->IER &= ~UART_IER_THRI;
2209                outb(port->IER, port->ioaddr + UART_IER);
2210        }
2211}
2212
2213/*
2214 * This is the serial driver's generic interrupt routine
2215 */
2216static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2217{
2218        int status, iir, i;
2219        struct mxser_board *brd = NULL;
2220        struct mxser_port *port;
2221        int max, irqbits, bits, msr;
2222        unsigned int int_cnt, pass_counter = 0;
2223        int handled = IRQ_NONE;
2224        struct tty_struct *tty;
2225
2226        for (i = 0; i < MXSER_BOARDS; i++)
2227                if (dev_id == &mxser_boards[i]) {
2228                        brd = dev_id;
2229                        break;
2230                }
2231
2232        if (i == MXSER_BOARDS)
2233                goto irq_stop;
2234        if (brd == NULL)
2235                goto irq_stop;
2236        max = brd->info->nports;
2237        while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2238                irqbits = inb(brd->vector) & brd->vector_mask;
2239                if (irqbits == brd->vector_mask)
2240                        break;
2241
2242                handled = IRQ_HANDLED;
2243                for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2244                        if (irqbits == brd->vector_mask)
2245                                break;
2246                        if (bits & irqbits)
2247                                continue;
2248                        port = &brd->ports[i];
2249
2250                        int_cnt = 0;
2251                        spin_lock(&port->slock);
2252                        do {
2253                                iir = inb(port->ioaddr + UART_IIR);
2254                                if (iir & UART_IIR_NO_INT)
2255                                        break;
2256                                iir &= MOXA_MUST_IIR_MASK;
2257                                tty = tty_port_tty_get(&port->port);
2258                                if (!tty ||
2259                                                (port->port.flags & ASYNC_CLOSING) ||
2260                                                !(port->port.flags &
2261                                                        ASYNC_INITIALIZED)) {
2262                                        status = inb(port->ioaddr + UART_LSR);
2263                                        outb(0x27, port->ioaddr + UART_FCR);
2264                                        inb(port->ioaddr + UART_MSR);
2265                                        tty_kref_put(tty);
2266                                        break;
2267                                }
2268
2269                                status = inb(port->ioaddr + UART_LSR);
2270
2271                                if (status & UART_LSR_PE)
2272                                        port->err_shadow |= NPPI_NOTIFY_PARITY;
2273                                if (status & UART_LSR_FE)
2274                                        port->err_shadow |= NPPI_NOTIFY_FRAMING;
2275                                if (status & UART_LSR_OE)
2276                                        port->err_shadow |=
2277                                                NPPI_NOTIFY_HW_OVERRUN;
2278                                if (status & UART_LSR_BI)
2279                                        port->err_shadow |= NPPI_NOTIFY_BREAK;
2280
2281                                if (port->board->chip_flag) {
2282                                        if (iir == MOXA_MUST_IIR_GDA ||
2283                                            iir == MOXA_MUST_IIR_RDA ||
2284                                            iir == MOXA_MUST_IIR_RTO ||
2285                                            iir == MOXA_MUST_IIR_LSR)
2286                                                mxser_receive_chars(tty, port,
2287                                                                &status);
2288
2289                                } else {
2290                                        status &= port->read_status_mask;
2291                                        if (status & UART_LSR_DR)
2292                                                mxser_receive_chars(tty, port,
2293                                                                &status);
2294                                }
2295                                msr = inb(port->ioaddr + UART_MSR);
2296                                if (msr & UART_MSR_ANY_DELTA)
2297                                        mxser_check_modem_status(tty, port, msr);
2298
2299                                if (port->board->chip_flag) {
2300                                        if (iir == 0x02 && (status &
2301                                                                UART_LSR_THRE))
2302                                                mxser_transmit_chars(tty, port);
2303                                } else {
2304                                        if (status & UART_LSR_THRE)
2305                                                mxser_transmit_chars(tty, port);
2306                                }
2307                                tty_kref_put(tty);
2308                        } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2309                        spin_unlock(&port->slock);
2310                }
2311        }
2312
2313irq_stop:
2314        return handled;
2315}
2316
2317static const struct tty_operations mxser_ops = {
2318        .open = mxser_open,
2319        .close = mxser_close,
2320        .write = mxser_write,
2321        .put_char = mxser_put_char,
2322        .flush_chars = mxser_flush_chars,
2323        .write_room = mxser_write_room,
2324        .chars_in_buffer = mxser_chars_in_buffer,
2325        .flush_buffer = mxser_flush_buffer,
2326        .ioctl = mxser_ioctl,
2327        .throttle = mxser_throttle,
2328        .unthrottle = mxser_unthrottle,
2329        .set_termios = mxser_set_termios,
2330        .stop = mxser_stop,
2331        .start = mxser_start,
2332        .hangup = mxser_hangup,
2333        .break_ctl = mxser_rs_break,
2334        .wait_until_sent = mxser_wait_until_sent,
2335        .tiocmget = mxser_tiocmget,
2336        .tiocmset = mxser_tiocmset,
2337        .get_icount = mxser_get_icount,
2338};
2339
2340static struct tty_port_operations mxser_port_ops = {
2341        .carrier_raised = mxser_carrier_raised,
2342        .dtr_rts = mxser_dtr_rts,
2343        .activate = mxser_activate,
2344        .shutdown = mxser_shutdown_port,
2345};
2346
2347/*
2348 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2349 */
2350
2351static bool allow_overlapping_vector;
2352module_param(allow_overlapping_vector, bool, S_IRUGO);
2353MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2354
2355static bool mxser_overlapping_vector(struct mxser_board *brd)
2356{
2357        return allow_overlapping_vector &&
2358                brd->vector >= brd->ports[0].ioaddr &&
2359                brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
2360}
2361
2362static int mxser_request_vector(struct mxser_board *brd)
2363{
2364        if (mxser_overlapping_vector(brd))
2365                return 0;
2366        return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
2367}
2368
2369static void mxser_release_vector(struct mxser_board *brd)
2370{
2371        if (mxser_overlapping_vector(brd))
2372                return;
2373        release_region(brd->vector, 1);
2374}
2375
2376static void mxser_release_ISA_res(struct mxser_board *brd)
2377{
2378        release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2379        mxser_release_vector(brd);
2380}
2381
2382static int mxser_initbrd(struct mxser_board *brd,
2383                struct pci_dev *pdev)
2384{
2385        struct mxser_port *info;
2386        unsigned int i;
2387        int retval;
2388
2389        printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2390                        brd->ports[0].max_baud);
2391
2392        for (i = 0; i < brd->info->nports; i++) {
2393                info = &brd->ports[i];
2394                tty_port_init(&info->port);
2395                info->port.ops = &mxser_port_ops;
2396                info->board = brd;
2397                info->stop_rx = 0;
2398                info->ldisc_stop_rx = 0;
2399
2400                /* Enhance mode enabled here */
2401                if (brd->chip_flag != MOXA_OTHER_UART)
2402                        mxser_enable_must_enchance_mode(info->ioaddr);
2403
2404                info->port.flags = ASYNC_SHARE_IRQ;
2405                info->type = brd->uart_type;
2406
2407                process_txrx_fifo(info);
2408
2409                info->custom_divisor = info->baud_base * 16;
2410                info->port.close_delay = 5 * HZ / 10;
2411                info->port.closing_wait = 30 * HZ;
2412                info->normal_termios = mxvar_sdriver->init_termios;
2413                memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2414                info->err_shadow = 0;
2415                spin_lock_init(&info->slock);
2416
2417                /* before set INT ISR, disable all int */
2418                outb(inb(info->ioaddr + UART_IER) & 0xf0,
2419                        info->ioaddr + UART_IER);
2420        }
2421
2422        retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2423                        brd);
2424        if (retval) {
2425                for (i = 0; i < brd->info->nports; i++)
2426                        tty_port_destroy(&brd->ports[i].port);
2427                printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2428                        "conflict with another device.\n",
2429                        brd->info->name, brd->irq);
2430        }
2431
2432        return retval;
2433}
2434
2435static void mxser_board_remove(struct mxser_board *brd)
2436{
2437        unsigned int i;
2438
2439        for (i = 0; i < brd->info->nports; i++) {
2440                tty_unregister_device(mxvar_sdriver, brd->idx + i);
2441                tty_port_destroy(&brd->ports[i].port);
2442        }
2443        free_irq(brd->irq, brd);
2444}
2445
2446static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2447{
2448        int id, i, bits, ret;
2449        unsigned short regs[16], irq;
2450        unsigned char scratch, scratch2;
2451
2452        brd->chip_flag = MOXA_OTHER_UART;
2453
2454        id = mxser_read_register(cap, regs);
2455        switch (id) {
2456        case C168_ASIC_ID:
2457                brd->info = &mxser_cards[0];
2458                break;
2459        case C104_ASIC_ID:
2460                brd->info = &mxser_cards[1];
2461                break;
2462        case CI104J_ASIC_ID:
2463                brd->info = &mxser_cards[2];
2464                break;
2465        case C102_ASIC_ID:
2466                brd->info = &mxser_cards[5];
2467                break;
2468        case CI132_ASIC_ID:
2469                brd->info = &mxser_cards[6];
2470                break;
2471        case CI134_ASIC_ID:
2472                brd->info = &mxser_cards[7];
2473                break;
2474        default:
2475                return 0;
2476        }
2477
2478        irq = 0;
2479        /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2480           Flag-hack checks if configuration should be read as 2-port here. */
2481        if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2482                irq = regs[9] & 0xF000;
2483                irq = irq | (irq >> 4);
2484                if (irq != (regs[9] & 0xFF00))
2485                        goto err_irqconflict;
2486        } else if (brd->info->nports == 4) {
2487                irq = regs[9] & 0xF000;
2488                irq = irq | (irq >> 4);
2489                irq = irq | (irq >> 8);
2490                if (irq != regs[9])
2491                        goto err_irqconflict;
2492        } else if (brd->info->nports == 8) {
2493                irq = regs[9] & 0xF000;
2494                irq = irq | (irq >> 4);
2495                irq = irq | (irq >> 8);
2496                if ((irq != regs[9]) || (irq != regs[10]))
2497                        goto err_irqconflict;
2498        }
2499
2500        if (!irq) {
2501                printk(KERN_ERR "mxser: interrupt number unset\n");
2502                return -EIO;
2503        }
2504        brd->irq = ((int)(irq & 0xF000) >> 12);
2505        for (i = 0; i < 8; i++)
2506                brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2507        if ((regs[12] & 0x80) == 0) {
2508                printk(KERN_ERR "mxser: invalid interrupt vector\n");
2509                return -EIO;
2510        }
2511        brd->vector = (int)regs[11];    /* interrupt vector */
2512        if (id == 1)
2513                brd->vector_mask = 0x00FF;
2514        else
2515                brd->vector_mask = 0x000F;
2516        for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2517                if (regs[12] & bits) {
2518                        brd->ports[i].baud_base = 921600;
2519                        brd->ports[i].max_baud = 921600;
2520                } else {
2521                        brd->ports[i].baud_base = 115200;
2522                        brd->ports[i].max_baud = 115200;
2523                }
2524        }
2525        scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2526        outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2527        outb(0, cap + UART_EFR);        /* EFR is the same as FCR */
2528        outb(scratch2, cap + UART_LCR);
2529        outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2530        scratch = inb(cap + UART_IIR);
2531
2532        if (scratch & 0xC0)
2533                brd->uart_type = PORT_16550A;
2534        else
2535                brd->uart_type = PORT_16450;
2536        if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2537                        "mxser(IO)")) {
2538                printk(KERN_ERR "mxser: can't request ports I/O region: "
2539                                "0x%.8lx-0x%.8lx\n",
2540                                brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2541                                8 * brd->info->nports - 1);
2542                return -EIO;
2543        }
2544
2545        ret = mxser_request_vector(brd);
2546        if (ret) {
2547                release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2548                printk(KERN_ERR "mxser: can't request interrupt vector region: "
2549                                "0x%.8lx-0x%.8lx\n",
2550                                brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2551                                8 * brd->info->nports - 1);
2552                return ret;
2553        }
2554        return brd->info->nports;
2555
2556err_irqconflict:
2557        printk(KERN_ERR "mxser: invalid interrupt number\n");
2558        return -EIO;
2559}
2560
2561static int mxser_probe(struct pci_dev *pdev,
2562                const struct pci_device_id *ent)
2563{
2564#ifdef CONFIG_PCI
2565        struct mxser_board *brd;
2566        unsigned int i, j;
2567        unsigned long ioaddress;
2568        struct device *tty_dev;
2569        int retval = -EINVAL;
2570
2571        for (i = 0; i < MXSER_BOARDS; i++)
2572                if (mxser_boards[i].info == NULL)
2573                        break;
2574
2575        if (i >= MXSER_BOARDS) {
2576                dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2577                                "not configured\n", MXSER_BOARDS);
2578                goto err;
2579        }
2580
2581        brd = &mxser_boards[i];
2582        brd->idx = i * MXSER_PORTS_PER_BOARD;
2583        dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2584                mxser_cards[ent->driver_data].name,
2585                pdev->bus->number, PCI_SLOT(pdev->devfn));
2586
2587        retval = pci_enable_device(pdev);
2588        if (retval) {
2589                dev_err(&pdev->dev, "PCI enable failed\n");
2590                goto err;
2591        }
2592
2593        /* io address */
2594        ioaddress = pci_resource_start(pdev, 2);
2595        retval = pci_request_region(pdev, 2, "mxser(IO)");
2596        if (retval)
2597                goto err_dis;
2598
2599        brd->info = &mxser_cards[ent->driver_data];
2600        for (i = 0; i < brd->info->nports; i++)
2601                brd->ports[i].ioaddr = ioaddress + 8 * i;
2602
2603        /* vector */
2604        ioaddress = pci_resource_start(pdev, 3);
2605        retval = pci_request_region(pdev, 3, "mxser(vector)");
2606        if (retval)
2607                goto err_zero;
2608        brd->vector = ioaddress;
2609
2610        /* irq */
2611        brd->irq = pdev->irq;
2612
2613        brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2614        brd->uart_type = PORT_16550A;
2615        brd->vector_mask = 0;
2616
2617        for (i = 0; i < brd->info->nports; i++) {
2618                for (j = 0; j < UART_INFO_NUM; j++) {
2619                        if (Gpci_uart_info[j].type == brd->chip_flag) {
2620                                brd->ports[i].max_baud =
2621                                        Gpci_uart_info[j].max_baud;
2622
2623                                /* exception....CP-102 */
2624                                if (brd->info->flags & MXSER_HIGHBAUD)
2625                                        brd->ports[i].max_baud = 921600;
2626                                break;
2627                        }
2628                }
2629        }
2630
2631        if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2632                for (i = 0; i < brd->info->nports; i++) {
2633                        if (i < 4)
2634                                brd->ports[i].opmode_ioaddr = ioaddress + 4;
2635                        else
2636                                brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2637                }
2638                outb(0, ioaddress + 4); /* default set to RS232 mode */
2639                outb(0, ioaddress + 0x0c);      /* default set to RS232 mode */
2640        }
2641
2642        for (i = 0; i < brd->info->nports; i++) {
2643                brd->vector_mask |= (1 << i);
2644                brd->ports[i].baud_base = 921600;
2645        }
2646
2647        /* mxser_initbrd will hook ISR. */
2648        retval = mxser_initbrd(brd, pdev);
2649        if (retval)
2650                goto err_rel3;
2651
2652        for (i = 0; i < brd->info->nports; i++) {
2653                tty_dev = tty_port_register_device(&brd->ports[i].port,
2654                                mxvar_sdriver, brd->idx + i, &pdev->dev);
2655                if (IS_ERR(tty_dev)) {
2656                        retval = PTR_ERR(tty_dev);
2657                        for (; i > 0; i--)
2658                                tty_unregister_device(mxvar_sdriver,
2659                                        brd->idx + i - 1);
2660                        goto err_relbrd;
2661                }
2662        }
2663
2664        pci_set_drvdata(pdev, brd);
2665
2666        return 0;
2667err_relbrd:
2668        for (i = 0; i < brd->info->nports; i++)
2669                tty_port_destroy(&brd->ports[i].port);
2670        free_irq(brd->irq, brd);
2671err_rel3:
2672        pci_release_region(pdev, 3);
2673err_zero:
2674        brd->info = NULL;
2675        pci_release_region(pdev, 2);
2676err_dis:
2677        pci_disable_device(pdev);
2678err:
2679        return retval;
2680#else
2681        return -ENODEV;
2682#endif
2683}
2684
2685static void mxser_remove(struct pci_dev *pdev)
2686{
2687#ifdef CONFIG_PCI
2688        struct mxser_board *brd = pci_get_drvdata(pdev);
2689
2690        mxser_board_remove(brd);
2691
2692        pci_release_region(pdev, 2);
2693        pci_release_region(pdev, 3);
2694        pci_disable_device(pdev);
2695        brd->info = NULL;
2696#endif
2697}
2698
2699static struct pci_driver mxser_driver = {
2700        .name = "mxser",
2701        .id_table = mxser_pcibrds,
2702        .probe = mxser_probe,
2703        .remove = mxser_remove
2704};
2705
2706static int __init mxser_module_init(void)
2707{
2708        struct mxser_board *brd;
2709        struct device *tty_dev;
2710        unsigned int b, i, m;
2711        int retval;
2712
2713        mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2714        if (!mxvar_sdriver)
2715                return -ENOMEM;
2716
2717        printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2718                MXSER_VERSION);
2719
2720        /* Initialize the tty_driver structure */
2721        mxvar_sdriver->name = "ttyMI";
2722        mxvar_sdriver->major = ttymajor;
2723        mxvar_sdriver->minor_start = 0;
2724        mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2725        mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2726        mxvar_sdriver->init_termios = tty_std_termios;
2727        mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2728        mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2729        tty_set_operations(mxvar_sdriver, &mxser_ops);
2730
2731        retval = tty_register_driver(mxvar_sdriver);
2732        if (retval) {
2733                printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2734                                "tty driver !\n");
2735                goto err_put;
2736        }
2737
2738        /* Start finding ISA boards here */
2739        for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2740                if (!ioaddr[b])
2741                        continue;
2742
2743                brd = &mxser_boards[m];
2744                retval = mxser_get_ISA_conf(ioaddr[b], brd);
2745                if (retval <= 0) {
2746                        brd->info = NULL;
2747                        continue;
2748                }
2749
2750                printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2751                                brd->info->name, ioaddr[b]);
2752
2753                /* mxser_initbrd will hook ISR. */
2754                if (mxser_initbrd(brd, NULL) < 0) {
2755                        mxser_release_ISA_res(brd);
2756                        brd->info = NULL;
2757                        continue;
2758                }
2759
2760                brd->idx = m * MXSER_PORTS_PER_BOARD;
2761                for (i = 0; i < brd->info->nports; i++) {
2762                        tty_dev = tty_port_register_device(&brd->ports[i].port,
2763                                        mxvar_sdriver, brd->idx + i, NULL);
2764                        if (IS_ERR(tty_dev)) {
2765                                for (; i > 0; i--)
2766                                        tty_unregister_device(mxvar_sdriver,
2767                                                brd->idx + i - 1);
2768                                for (i = 0; i < brd->info->nports; i++)
2769                                        tty_port_destroy(&brd->ports[i].port);
2770                                free_irq(brd->irq, brd);
2771                                mxser_release_ISA_res(brd);
2772                                brd->info = NULL;
2773                                break;
2774                        }
2775                }
2776                if (brd->info == NULL)
2777                        continue;
2778
2779                m++;
2780        }
2781
2782        retval = pci_register_driver(&mxser_driver);
2783        if (retval) {
2784                printk(KERN_ERR "mxser: can't register pci driver\n");
2785                if (!m) {
2786                        retval = -ENODEV;
2787                        goto err_unr;
2788                } /* else: we have some ISA cards under control */
2789        }
2790
2791        return 0;
2792err_unr:
2793        tty_unregister_driver(mxvar_sdriver);
2794err_put:
2795        put_tty_driver(mxvar_sdriver);
2796        return retval;
2797}
2798
2799static void __exit mxser_module_exit(void)
2800{
2801        unsigned int i;
2802
2803        pci_unregister_driver(&mxser_driver);
2804
2805        for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2806                if (mxser_boards[i].info != NULL)
2807                        mxser_board_remove(&mxser_boards[i]);
2808        tty_unregister_driver(mxvar_sdriver);
2809        put_tty_driver(mxvar_sdriver);
2810
2811        for (i = 0; i < MXSER_BOARDS; i++)
2812                if (mxser_boards[i].info != NULL)
2813                        mxser_release_ISA_res(&mxser_boards[i]);
2814}
2815
2816module_init(mxser_module_init);
2817module_exit(mxser_module_exit);
2818
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