Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 3170 insertions, 0 deletions

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
new file mode 100644
index 000000000000..7a245068e3e5
--- /dev/null
+++ b/drivers/char/mxser.c
@@ -0,0 +1,3170 @@
+/*
+ *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
+ *
+ *      Copyright (C) 1999-2001  Moxa Technologies (support@moxa.com.tw).
+ *
+ *      This code is loosely based on the Linux serial driver, written by
+ *      Linus Torvalds, Theodore T'so and others.
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+*      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *	Original release	10/26/00
+ *
+ *	02/06/01	Support MOXA Industio family boards.
+ *	02/06/01	Support TIOCGICOUNT.
+ *	02/06/01	Fix the problem for connecting to serial mouse.
+ *	02/06/01	Fix the problem for H/W flow control.
+ *	02/06/01	Fix the compling warning when CONFIG_PCI
+ *			don't be defined.
+ *
+ *	Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
+ *	<alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
+ *	- Fixed x86_64 cleanness
+ *	- Fixed sleep with spinlock held in mxser_send_break
+ */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/autoconf.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/gfp.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/segment.h>
+#include <asm/bitops.h>
+#include <asm/uaccess.h>
+
+#include "mxser.h"
+
+#define	MXSER_VERSION	"1.8"
+#define	MXSERMAJOR	 174
+#define	MXSERCUMAJOR	 175
+
+#define	MXSER_EVENT_TXLOW	 1
+#define	MXSER_EVENT_HANGUP	 2
+
+#define MXSER_BOARDS		4	/* Max. boards */
+#define MXSER_PORTS		32	/* Max. ports */
+#define MXSER_PORTS_PER_BOARD	8	/* Max. ports per board */
+#define MXSER_ISR_PASS_LIMIT	256
+
+#define	MXSER_ERR_IOADDR	-1
+#define	MXSER_ERR_IRQ		-2
+#define	MXSER_ERR_IRQ_CONFLIT	-3
+#define	MXSER_ERR_VECTOR	-4
+
+#define SERIAL_TYPE_NORMAL	1
+#define SERIAL_TYPE_CALLOUT	2
+
+#define WAKEUP_CHARS		256
+
+#define UART_MCR_AFE		0x20
+#define UART_LSR_SPECIAL	0x1E
+
+#define RELEVANT_IFLAG(iflag)	(iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
+
+#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
+
+#define C168_ASIC_ID    1
+#define C104_ASIC_ID    2
+#define C102_ASIC_ID	0xB
+#define CI132_ASIC_ID	4
+#define CI134_ASIC_ID	3
+#define CI104J_ASIC_ID  5
+
+enum {
+	MXSER_BOARD_C168_ISA = 1,
+	MXSER_BOARD_C104_ISA,
+	MXSER_BOARD_CI104J,
+	MXSER_BOARD_C168_PCI,
+	MXSER_BOARD_C104_PCI,
+	MXSER_BOARD_C102_ISA,
+	MXSER_BOARD_CI132,
+	MXSER_BOARD_CI134,
+	MXSER_BOARD_CP132,
+	MXSER_BOARD_CP114,
+	MXSER_BOARD_CT114,
+	MXSER_BOARD_CP102,
+	MXSER_BOARD_CP104U,
+	MXSER_BOARD_CP168U,
+	MXSER_BOARD_CP132U,
+	MXSER_BOARD_CP134U,
+	MXSER_BOARD_CP104JU,
+	MXSER_BOARD_RC7000,
+	MXSER_BOARD_CP118U,
+	MXSER_BOARD_CP102UL,
+	MXSER_BOARD_CP102U,
+};
+
+static char *mxser_brdname[] = {
+	"C168 series",
+	"C104 series",
+	"CI-104J series",
+	"C168H/PCI series",
+	"C104H/PCI series",
+	"C102 series",
+	"CI-132 series",
+	"CI-134 series",
+	"CP-132 series",
+	"CP-114 series",
+	"CT-114 series",
+	"CP-102 series",
+	"CP-104U series",
+	"CP-168U series",
+	"CP-132U series",
+	"CP-134U series",
+	"CP-104JU series",
+	"Moxa UC7000 Serial",
+	"CP-118U series",
+	"CP-102UL series",
+	"CP-102U series",
+};
+
+static int mxser_numports[] = {
+	8,			// C168-ISA
+	4,			// C104-ISA
+	4,			// CI104J
+	8,			// C168-PCI
+	4,			// C104-PCI
+	2,			// C102-ISA
+	2,			// CI132
+	4,			// CI134
+	2,			// CP132
+	4,			// CP114
+	4,			// CT114
+	2,			// CP102
+	4,			// CP104U
+	8,			// CP168U
+	2,			// CP132U
+	4,			// CP134U
+	4,			// CP104JU
+	8,			// RC7000
+	8,			// CP118U 
+	2,			// CP102UL 
+	2,			// CP102U
+};
+
+#define UART_TYPE_NUM	2
+
+static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
+	MOXA_MUST_MU150_HWID,
+	MOXA_MUST_MU860_HWID
+};
+
+// This is only for PCI
+#define UART_INFO_NUM	3
+struct mxpciuart_info {
+	int type;
+	int tx_fifo;
+	int rx_fifo;
+	int xmit_fifo_size;
+	int rx_high_water;
+	int rx_trigger;
+	int rx_low_water;
+	long max_baud;
+};
+
+static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
+	{MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
+	{MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
+	{MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
+};
+
+
+#ifdef CONFIG_PCI
+
+static struct pci_device_id mxser_pcibrds[] = {
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
+	{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
+
+
+#endif
+
+typedef struct _moxa_pci_info {
+	unsigned short busNum;
+	unsigned short devNum;
+	struct pci_dev *pdev;	// add by Victor Yu. 06-23-2003
+} moxa_pci_info;
+
+static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
+static int ttymajor = MXSERMAJOR;
+static int calloutmajor = MXSERCUMAJOR;
+static int verbose = 0;
+
+/* Variables for insmod */
+
+MODULE_AUTHOR("Casper Yang");
+MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
+MODULE_PARM(ioaddr, "1-4i");
+MODULE_PARM(ttymajor, "i");
+MODULE_PARM(calloutmajor, "i");
+MODULE_PARM(verbose, "i");
+MODULE_LICENSE("GPL");
+
+struct mxser_log {
+	int tick;
+	unsigned long rxcnt[MXSER_PORTS];
+	unsigned long txcnt[MXSER_PORTS];
+};
+
+
+struct mxser_mon {
+	unsigned long rxcnt;
+	unsigned long txcnt;
+	unsigned long up_rxcnt;
+	unsigned long up_txcnt;
+	int modem_status;
+	unsigned char hold_reason;
+};
+
+struct mxser_mon_ext {
+	unsigned long rx_cnt[32];
+	unsigned long tx_cnt[32];
+	unsigned long up_rxcnt[32];
+	unsigned long up_txcnt[32];
+	int modem_status[32];
+
+	long baudrate[32];
+	int databits[32];
+	int stopbits[32];
+	int parity[32];
+	int flowctrl[32];
+	int fifo[32];
+	int iftype[32];
+};
+struct mxser_hwconf {
+	int board_type;
+	int ports;
+	int irq;
+	int vector;
+	int vector_mask;
+	int uart_type;
+	int ioaddr[MXSER_PORTS_PER_BOARD];
+	int baud_base[MXSER_PORTS_PER_BOARD];
+	moxa_pci_info pciInfo;
+	int IsMoxaMustChipFlag;	// add by Victor Yu. 08-30-2002
+	int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD];	// add by Victor Yu. 09-04-2002
+	int opmode_ioaddr[MXSER_PORTS_PER_BOARD];	// add by Victor Yu. 01-05-2004
+};
+
+struct mxser_struct {
+	int port;
+	int base;		/* port base address */
+	int irq;		/* port using irq no. */
+	int vector;		/* port irq vector */
+	int vectormask;		/* port vector mask */
+	int rx_high_water;
+	int rx_trigger;		/* Rx fifo trigger level */
+	int rx_low_water;
+	int baud_base;		/* max. speed */
+	int flags;		/* defined in tty.h */
+	int type;		/* UART type */
+	struct tty_struct *tty;
+	int read_status_mask;
+	int ignore_status_mask;
+	int xmit_fifo_size;
+	int custom_divisor;
+	int x_char;		/* xon/xoff character */
+	int close_delay;
+	unsigned short closing_wait;
+	int IER;		/* Interrupt Enable Register */
+	int MCR;		/* Modem control register */
+	unsigned long event;
+	int count;		/* # of fd on device */
+	int blocked_open;	/* # of blocked opens */
+	long session;		/* Session of opening process */
+	long pgrp;		/* pgrp of opening process */
+	unsigned char *xmit_buf;
+	int xmit_head;
+	int xmit_tail;
+	int xmit_cnt;
+	struct work_struct tqueue;
+	struct termios normal_termios;
+	struct termios callout_termios;
+	wait_queue_head_t open_wait;
+	wait_queue_head_t close_wait;
+	wait_queue_head_t delta_msr_wait;
+	struct async_icount icount;	/* kernel counters for the 4 input interrupts */
+	int timeout;
+	int IsMoxaMustChipFlag;	// add by Victor Yu. 08-30-2002
+	int MaxCanSetBaudRate;	// add by Victor Yu. 09-04-2002
+	int opmode_ioaddr;	// add by Victor Yu. 01-05-2004
+	unsigned char stop_rx;
+	unsigned char ldisc_stop_rx;
+	long realbaud;
+	struct mxser_mon mon_data;
+	unsigned char err_shadow;
+	spinlock_t slock;
+};
+
+
+struct mxser_mstatus {
+	tcflag_t cflag;
+	int cts;
+	int dsr;
+	int ri;
+	int dcd;
+};
+
+static struct mxser_mstatus GMStatus[MXSER_PORTS];
+
+static int mxserBoardCAP[MXSER_BOARDS] = {
+	0, 0, 0, 0
+	    /*  0x180, 0x280, 0x200, 0x320   */
+};
+
+static struct tty_driver *mxvar_sdriver;
+static struct mxser_struct mxvar_table[MXSER_PORTS];
+static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
+static struct termios *mxvar_termios[MXSER_PORTS + 1];
+static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
+static struct mxser_log mxvar_log;
+static int mxvar_diagflag;
+static unsigned char mxser_msr[MXSER_PORTS + 1];
+static struct mxser_mon_ext mon_data_ext;
+static int mxser_set_baud_method[MXSER_PORTS + 1];
+static spinlock_t gm_lock;
+
+/*
+ * This is used to figure out the divisor speeds and the timeouts
+ */
+
+static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
+
+/*
+ * static functions:
+ */
+
+static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
+static int mxser_init(void);
+
+//static void   mxser_poll(unsigned long);
+static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
+static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
+static void mxser_do_softint(void *);
+static int mxser_open(struct tty_struct *, struct file *);
+static void mxser_close(struct tty_struct *, struct file *);
+static int mxser_write(struct tty_struct *, const unsigned char *, int);
+static int mxser_write_room(struct tty_struct *);
+static void mxser_flush_buffer(struct tty_struct *);
+static int mxser_chars_in_buffer(struct tty_struct *);
+static void mxser_flush_chars(struct tty_struct *);
+static void mxser_put_char(struct tty_struct *, unsigned char);
+static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
+static int mxser_ioctl_special(unsigned int, void __user *);
+static void mxser_throttle(struct tty_struct *);
+static void mxser_unthrottle(struct tty_struct *);
+static void mxser_set_termios(struct tty_struct *, struct termios *);
+static void mxser_stop(struct tty_struct *);
+static void mxser_start(struct tty_struct *);
+static void mxser_hangup(struct tty_struct *);
+static void mxser_rs_break(struct tty_struct *, int);
+static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
+static void mxser_receive_chars(struct mxser_struct *, int *);
+static void mxser_transmit_chars(struct mxser_struct *);
+static void mxser_check_modem_status(struct mxser_struct *, int);
+static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
+static int mxser_startup(struct mxser_struct *);
+static void mxser_shutdown(struct mxser_struct *);
+static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
+static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
+static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
+static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
+static void mxser_send_break(struct mxser_struct *, int);
+static int mxser_tiocmget(struct tty_struct *, struct file *);
+static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
+static int mxser_set_baud(struct mxser_struct *info, long newspd);
+static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
+
+static void mxser_startrx(struct tty_struct *tty);
+static void mxser_stoprx(struct tty_struct *tty);
+
+
+static int CheckIsMoxaMust(int io)
+{
+	u8 oldmcr, hwid;
+	int i;
+
+	outb(0, io + UART_LCR);
+	DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
+	oldmcr = inb(io + UART_MCR);
+	outb(0, io + UART_MCR);
+	SET_MOXA_MUST_XON1_VALUE(io, 0x11);
+	if ((hwid = inb(io + UART_MCR)) != 0) {
+		outb(oldmcr, io + UART_MCR);
+		return (MOXA_OTHER_UART);
+	}
+
+	GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
+	for (i = 0; i < UART_TYPE_NUM; i++) {
+		if (hwid == Gmoxa_uart_id[i])
+			return (int) hwid;
+	}
+	return MOXA_OTHER_UART;
+}
+
+// above is modified by Victor Yu. 08-15-2002
+
+static struct tty_operations mxser_ops = {
+	.open = mxser_open,
+	.close = mxser_close,
+	.write = mxser_write,
+	.put_char = mxser_put_char,
+	.flush_chars = mxser_flush_chars,
+	.write_room = mxser_write_room,
+	.chars_in_buffer = mxser_chars_in_buffer,
+	.flush_buffer = mxser_flush_buffer,
+	.ioctl = mxser_ioctl,
+	.throttle = mxser_throttle,
+	.unthrottle = mxser_unthrottle,
+	.set_termios = mxser_set_termios,
+	.stop = mxser_stop,
+	.start = mxser_start,
+	.hangup = mxser_hangup,
+	.tiocmget = mxser_tiocmget,
+	.tiocmset = mxser_tiocmset,
+};
+
+/*
+ * The MOXA Smartio/Industio serial driver boot-time initialization code!
+ */
+
+static int __init mxser_module_init(void)
+{
+	int ret;
+
+	if (verbose)
+		printk(KERN_DEBUG "Loading module mxser ...\n");
+	ret = mxser_init();
+	if (verbose)
+		printk(KERN_DEBUG "Done.\n");
+	return ret;
+}
+
+static void __exit mxser_module_exit(void)
+{
+	int i, err = 0;
+
+	if (verbose)
+		printk(KERN_DEBUG "Unloading module mxser ...\n");
+
+	if ((err |= tty_unregister_driver(mxvar_sdriver)))
+		printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
+
+	for (i = 0; i < MXSER_BOARDS; i++) {
+		struct pci_dev *pdev;
+
+		if (mxsercfg[i].board_type == -1)
+			continue;
+		else {
+			pdev = mxsercfg[i].pciInfo.pdev;
+			free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
+			if (pdev != NULL) {	//PCI
+				release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
+				release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
+			} else {
+				release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
+				release_region(mxsercfg[i].vector, 1);
+			}
+		}
+	}
+	if (verbose)
+		printk(KERN_DEBUG "Done.\n");
+
+}
+
+static void process_txrx_fifo(struct mxser_struct *info)
+{
+	int i;
+
+	if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
+		info->rx_trigger = 1;
+		info->rx_high_water = 1;
+		info->rx_low_water = 1;
+		info->xmit_fifo_size = 1;
+	} else {
+		for (i = 0; i < UART_INFO_NUM; i++) {
+			if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
+				info->rx_trigger = Gpci_uart_info[i].rx_trigger;
+				info->rx_low_water = Gpci_uart_info[i].rx_low_water;
+				info->rx_high_water = Gpci_uart_info[i].rx_high_water;
+				info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
+				break;
+			}
+		}
+	}
+}
+
+static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
+{
+	struct mxser_struct *info;
+	int retval;
+	int i, n;
+
+	n = board * MXSER_PORTS_PER_BOARD;
+	info = &mxvar_table[n];
+	/*if (verbose) */  {
+		printk(KERN_DEBUG "        ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
+		printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
+	}
+
+	for (i = 0; i < hwconf->ports; i++, n++, info++) {
+		info->port = n;
+		info->base = hwconf->ioaddr[i];
+		info->irq = hwconf->irq;
+		info->vector = hwconf->vector;
+		info->vectormask = hwconf->vector_mask;
+		info->opmode_ioaddr = hwconf->opmode_ioaddr[i];	// add by Victor Yu. 01-05-2004
+		info->stop_rx = 0;
+		info->ldisc_stop_rx = 0;
+
+		info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
+		//Enhance mode enabled here
+		if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
+			ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
+		}
+
+		info->flags = ASYNC_SHARE_IRQ;
+		info->type = hwconf->uart_type;
+		info->baud_base = hwconf->baud_base[i];
+
+		info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
+
+		process_txrx_fifo(info);
+
+
+		info->custom_divisor = hwconf->baud_base[i] * 16;
+		info->close_delay = 5 * HZ / 10;
+		info->closing_wait = 30 * HZ;
+		INIT_WORK(&info->tqueue, mxser_do_softint, info);
+		info->normal_termios = mxvar_sdriver->init_termios;
+		init_waitqueue_head(&info->open_wait);
+		init_waitqueue_head(&info->close_wait);
+		init_waitqueue_head(&info->delta_msr_wait);
+		memset(&info->mon_data, 0, sizeof(struct mxser_mon));
+		info->err_shadow = 0;
+		spin_lock_init(&info->slock);
+	}
+	/*
+	 * Allocate the IRQ if necessary
+	 */
+
+
+	/* before set INT ISR, disable all int */
+	for (i = 0; i < hwconf->ports; i++) {
+		outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
+	}
+
+	n = board * MXSER_PORTS_PER_BOARD;
+	info = &mxvar_table[n];
+
+	retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
+	if (retval) {
+		printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
+		printk("  Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
+		return retval;
+	}
+	return 0;
+}
+
+
+static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
+{
+	mxsercfg[board] = *hwconf;
+}
+
+#ifdef CONFIG_PCI
+static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
+{
+	int i, j;
+//      unsigned int    val;
+	unsigned int ioaddress;
+	struct pci_dev *pdev = hwconf->pciInfo.pdev;
+
+	//io address
+	hwconf->board_type = board_type;
+	hwconf->ports = mxser_numports[board_type - 1];
+	ioaddress = pci_resource_start(pdev, 2);
+	request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
+
+	for (i = 0; i < hwconf->ports; i++) {
+		hwconf->ioaddr[i] = ioaddress + 8 * i;
+	}
+
+	//vector
+	ioaddress = pci_resource_start(pdev, 3);
+	request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
+	hwconf->vector = ioaddress;
+
+	//irq
+	hwconf->irq = hwconf->pciInfo.pdev->irq;
+
+	hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
+	hwconf->uart_type = PORT_16550A;
+	hwconf->vector_mask = 0;
+
+
+	for (i = 0; i < hwconf->ports; i++) {
+		for (j = 0; j < UART_INFO_NUM; j++) {
+			if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
+				hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
+
+				//exception....CP-102
+				if (board_type == MXSER_BOARD_CP102)
+					hwconf->MaxCanSetBaudRate[i] = 921600;
+				break;
+			}
+		}
+	}
+
+	if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
+		for (i = 0; i < hwconf->ports; i++) {
+			if (i < 4)
+				hwconf->opmode_ioaddr[i] = ioaddress + 4;
+			else
+				hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
+		}
+		outb(0, ioaddress + 4);	// default set to RS232 mode
+		outb(0, ioaddress + 0x0c);	//default set to RS232 mode
+	}
+
+	for (i = 0; i < hwconf->ports; i++) {
+		hwconf->vector_mask |= (1 << i);
+		hwconf->baud_base[i] = 921600;
+	}
+	return (0);
+}
+#endif
+
+static int mxser_init(void)
+{
+	int i, m, retval, b, n;
+	int ret1;
+	struct pci_dev *pdev = NULL;
+	int index;
+	unsigned char busnum, devnum;
+	struct mxser_hwconf hwconf;
+
+	mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
+	if (!mxvar_sdriver)
+		return -ENOMEM;
+	spin_lock_init(&gm_lock);
+
+	for (i = 0; i < MXSER_BOARDS; i++) {
+		mxsercfg[i].board_type = -1;
+	}
+
+	printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
+
+	/* Initialize the tty_driver structure */
+	memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
+	mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
+	mxvar_sdriver->name = "ttyM";
+	mxvar_sdriver->major = ttymajor;
+	mxvar_sdriver->minor_start = 0;
+	mxvar_sdriver->num = MXSER_PORTS + 1;
+	mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
+	mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
+	mxvar_sdriver->init_termios = tty_std_termios;
+	mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+	mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
+	tty_set_operations(mxvar_sdriver, &mxser_ops);
+	mxvar_sdriver->ttys = mxvar_tty;
+	mxvar_sdriver->termios = mxvar_termios;
+	mxvar_sdriver->termios_locked = mxvar_termios_locked;
+
+	mxvar_sdriver->open = mxser_open;
+	mxvar_sdriver->close = mxser_close;
+	mxvar_sdriver->write = mxser_write;
+	mxvar_sdriver->put_char = mxser_put_char;
+	mxvar_sdriver->flush_chars = mxser_flush_chars;
+	mxvar_sdriver->write_room = mxser_write_room;
+	mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer;
+	mxvar_sdriver->flush_buffer = mxser_flush_buffer;
+	mxvar_sdriver->ioctl = mxser_ioctl;
+	mxvar_sdriver->throttle = mxser_throttle;
+	mxvar_sdriver->unthrottle = mxser_unthrottle;
+	mxvar_sdriver->set_termios = mxser_set_termios;
+	mxvar_sdriver->stop = mxser_stop;
+	mxvar_sdriver->start = mxser_start;
+	mxvar_sdriver->hangup = mxser_hangup;
+	mxvar_sdriver->break_ctl = mxser_rs_break;
+	mxvar_sdriver->wait_until_sent = mxser_wait_until_sent;
+
+	mxvar_diagflag = 0;
+	memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
+	memset(&mxvar_log, 0, sizeof(struct mxser_log));
+
+	memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
+	memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
+	memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
+	memset(&hwconf, 0, sizeof(struct mxser_hwconf));
+
+	m = 0;
+	/* Start finding ISA boards here */
+	for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
+		int cap;
+		if (!(cap = mxserBoardCAP[b]))
+			continue;
+
+		retval = mxser_get_ISA_conf(cap, &hwconf);
+
+		if (retval != 0)
+			printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
+
+		if (retval <= 0) {
+			if (retval == MXSER_ERR_IRQ)
+				printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+			else if (retval == MXSER_ERR_IRQ_CONFLIT)
+				printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+			else if (retval == MXSER_ERR_VECTOR)
+				printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
+			else if (retval == MXSER_ERR_IOADDR)
+				printk(KERN_ERR "Invalid I/O address,board not configured\n");
+
+			continue;
+		}
+
+		hwconf.pciInfo.busNum = 0;
+		hwconf.pciInfo.devNum = 0;
+		hwconf.pciInfo.pdev = NULL;
+
+		mxser_getcfg(m, &hwconf);
+		//init mxsercfg first, or mxsercfg data is not correct on ISR.
+		//mxser_initbrd will hook ISR.
+		if (mxser_initbrd(m, &hwconf) < 0)
+			continue;
+
+
+		m++;
+	}
+
+	/* Start finding ISA boards from module arg */
+	for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
+		int cap;
+		if (!(cap = ioaddr[b]))
+			continue;
+
+		retval = mxser_get_ISA_conf(cap, &hwconf);
+
+		if (retval != 0)
+			printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
+
+		if (retval <= 0) {
+			if (retval == MXSER_ERR_IRQ)
+				printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+			else if (retval == MXSER_ERR_IRQ_CONFLIT)
+				printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+			else if (retval == MXSER_ERR_VECTOR)
+				printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
+			else if (retval == MXSER_ERR_IOADDR)
+				printk(KERN_ERR "Invalid I/O address,board not configured\n");
+
+			continue;
+		}
+
+		hwconf.pciInfo.busNum = 0;
+		hwconf.pciInfo.devNum = 0;
+		hwconf.pciInfo.pdev = NULL;
+
+		mxser_getcfg(m, &hwconf);
+		//init mxsercfg first, or mxsercfg data is not correct on ISR.
+		//mxser_initbrd will hook ISR.
+		if (mxser_initbrd(m, &hwconf) < 0)
+			continue;
+
+		m++;
+	}
+
+	/* start finding PCI board here */
+#ifdef CONFIG_PCI
+	n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
+	index = 0;
+	b = 0;
+	while (b < n) {
+		pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
+			if (pdev == NULL) {
+			b++;
+			continue;
+		}
+		hwconf.pciInfo.busNum = busnum = pdev->bus->number;
+		hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
+		hwconf.pciInfo.pdev = pdev;
+		printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
+		index++;
+		if (m >= MXSER_BOARDS) {
+			printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
+		} else {
+			if (pci_enable_device(pdev)) {
+				printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
+				continue;
+			}
+			retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
+			if (retval < 0) {
+				if (retval == MXSER_ERR_IRQ)
+					printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+				else if (retval == MXSER_ERR_IRQ_CONFLIT)
+					printk(KERN_ERR "Invalid interrupt number,board not configured\n");
+				else if (retval == MXSER_ERR_VECTOR)
+					printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
+				else if (retval == MXSER_ERR_IOADDR)
+					printk(KERN_ERR "Invalid I/O address,board not configured\n");
+				continue;
+			}
+			mxser_getcfg(m, &hwconf);
+			//init mxsercfg first, or mxsercfg data is not correct on ISR.
+			//mxser_initbrd will hook ISR.
+			if (mxser_initbrd(m, &hwconf) < 0)
+				continue;
+			m++;
+		}
+	}
+#endif
+
+	ret1 = 0;
+	if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
+		return 0;
+	} else
+		printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
+
+
+	if (ret1) {
+		for (i = 0; i < MXSER_BOARDS; i++) {
+			if (mxsercfg[i].board_type == -1)
+				continue;
+			else {
+				free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
+				//todo: release io, vector
+			}
+		}
+		return -1;
+	}
+
+	return (0);
+}
+
+static void mxser_do_softint(void *private_)
+{
+	struct mxser_struct *info = (struct mxser_struct *) private_;
+	struct tty_struct *tty;
+
+	tty = info->tty;
+
+	if (tty) {
+		if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
+			tty_wakeup(tty);
+		if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
+			tty_hangup(tty);
+	}
+}
+
+static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
+{
+	unsigned char status = 0;
+
+	status = inb(baseaddr + UART_MSR);
+
+	mxser_msr[port] &= 0x0F;
+	mxser_msr[port] |= status;
+	status = mxser_msr[port];
+	if (mode)
+		mxser_msr[port] = 0;
+
+	return status;
+}
+
+/*
+ * This routine is called whenever a serial port is opened.  It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain.   It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int mxser_open(struct tty_struct *tty, struct file *filp)
+{
+	struct mxser_struct *info;
+	int retval, line;
+
+	line = tty->index;
+	if (line == MXSER_PORTS)
+		return 0;
+	if (line < 0 || line > MXSER_PORTS)
+		return -ENODEV;
+	info = mxvar_table + line;
+	if (!info->base)
+		return (-ENODEV);
+
+	tty->driver_data = info;
+	info->tty = tty;
+	/*
+	 * Start up serial port
+	 */
+	retval = mxser_startup(info);
+	if (retval)
+		return (retval);
+
+	retval = mxser_block_til_ready(tty, filp, info);
+	if (retval)
+		return (retval);
+
+	info->count++;
+
+	if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
+		if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
+			*tty->termios = info->normal_termios;
+		else
+			*tty->termios = info->callout_termios;
+		mxser_change_speed(info, NULL);
+	}
+
+	info->session = current->signal->session;
+	info->pgrp = process_group(current);
+	clear_bit(TTY_DONT_FLIP, &tty->flags);
+
+	//status = mxser_get_msr(info->base, 0, info->port);
+	//mxser_check_modem_status(info, status);
+
+/* unmark here for very high baud rate (ex. 921600 bps) used
+*/
+	tty->low_latency = 1;
+	return 0;
+}
+
+/*
+ * This routine is called when the serial port gets closed.  First, we
+ * wait for the last remaining data to be sent.  Then, we unlink its
+ * async structure from the interrupt chain if necessary, and we free
+ * that IRQ if nothing is left in the chain.
+ */
+static void mxser_close(struct tty_struct *tty, struct file *filp)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+
+	unsigned long timeout;
+	unsigned long flags;
+	struct tty_ldisc *ld;
+
+	if (tty->index == MXSER_PORTS)
+		return;
+	if (!info)
+		BUG();
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	if (tty_hung_up_p(filp)) {
+		spin_unlock_irqrestore(&info->slock, flags);
+		return;
+	}
+	if ((tty->count == 1) && (info->count != 1)) {
+		/*
+		 * Uh, oh.  tty->count is 1, which means that the tty
+		 * structure will be freed.  Info->count should always
+		 * be one in these conditions.  If it's greater than
+		 * one, we've got real problems, since it means the
+		 * serial port won't be shutdown.
+		 */
+		printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
+		info->count = 1;
+	}
+	if (--info->count < 0) {
+		printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
+		info->count = 0;
+	}
+	if (info->count) {
+		spin_unlock_irqrestore(&info->slock, flags);
+		return;
+	}
+	info->flags |= ASYNC_CLOSING;
+	spin_unlock_irqrestore(&info->slock, flags);
+	/*
+	 * Save the termios structure, since this port may have
+	 * separate termios for callout and dialin.
+	 */
+	if (info->flags & ASYNC_NORMAL_ACTIVE)
+		info->normal_termios = *tty->termios;
+	/*
+	 * Now we wait for the transmit buffer to clear; and we notify
+	 * the line discipline to only process XON/XOFF characters.
+	 */
+	tty->closing = 1;
+	if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+		tty_wait_until_sent(tty, info->closing_wait);
+	/*
+	 * At this point we stop accepting input.  To do this, we
+	 * disable the receive line status interrupts, and tell the
+	 * interrupt driver to stop checking the data ready bit in the
+	 * line status register.
+	 */
+	info->IER &= ~UART_IER_RLSI;
+	if (info->IsMoxaMustChipFlag)
+		info->IER &= ~MOXA_MUST_RECV_ISR;
+/* by William
+	info->read_status_mask &= ~UART_LSR_DR;
+*/
+	if (info->flags & ASYNC_INITIALIZED) {
+		outb(info->IER, info->base + UART_IER);
+		/*
+		 * Before we drop DTR, make sure the UART transmitter
+		 * has completely drained; this is especially
+		 * important if there is a transmit FIFO!
+		 */
+		timeout = jiffies + HZ;
+		while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule_timeout(5);
+			if (time_after(jiffies, timeout))
+				break;
+		}
+	}
+	mxser_shutdown(info);
+
+	if (tty->driver->flush_buffer)
+		tty->driver->flush_buffer(tty);
+		
+	ld = tty_ldisc_ref(tty);
+	if (ld) {
+		if(ld->flush_buffer)
+			ld->flush_buffer(tty);
+		tty_ldisc_deref(ld);
+	}
+		
+	tty->closing = 0;
+	info->event = 0;
+	info->tty = NULL;
+	if (info->blocked_open) {
+		if (info->close_delay) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule_timeout(info->close_delay);
+		}
+		wake_up_interruptible(&info->open_wait);
+	}
+
+	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	wake_up_interruptible(&info->close_wait);
+
+}
+
+static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+	int c, total = 0;
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	if (!tty || !info->xmit_buf)
+		return (0);
+
+	while (1) {
+		c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
+		if (c <= 0)
+			break;
+
+		memcpy(info->xmit_buf + info->xmit_head, buf, c);
+		spin_lock_irqsave(&info->slock, flags);
+		info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
+		info->xmit_cnt += c;
+		spin_unlock_irqrestore(&info->slock, flags);
+
+		buf += c;
+		count -= c;
+		total += c;
+
+	}
+
+	if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
+		if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
+			spin_lock_irqsave(&info->slock, flags);
+			info->IER |= UART_IER_THRI;
+			outb(info->IER, info->base + UART_IER);
+			spin_unlock_irqrestore(&info->slock, flags);
+		}
+	}
+	return total;
+}
+
+static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	if (!tty || !info->xmit_buf)
+		return;
+
+	if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
+		return;
+
+	spin_lock_irqsave(&info->slock, flags);
+	info->xmit_buf[info->xmit_head++] = ch;
+	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
+	info->xmit_cnt++;
+	spin_unlock_irqrestore(&info->slock, flags);
+	if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
+		if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
+			spin_lock_irqsave(&info->slock, flags);
+			info->IER |= UART_IER_THRI;
+			outb(info->IER, info->base + UART_IER);
+			spin_unlock_irqrestore(&info->slock, flags);
+		}
+	}
+}
+
+
+static void mxser_flush_chars(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
+		return;
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	info->IER |= UART_IER_THRI;
+	outb(info->IER, info->base + UART_IER);
+
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static int mxser_write_room(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	int ret;
+
+	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+	if (ret < 0)
+		ret = 0;
+	return (ret);
+}
+
+static int mxser_chars_in_buffer(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	return info->xmit_cnt;
+}
+
+static void mxser_flush_buffer(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	char fcr;
+	unsigned long flags;
+
+
+	spin_lock_irqsave(&info->slock, flags);
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+	/* below added by shinhay */
+	fcr = inb(info->base + UART_FCR);
+	outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
+	outb(fcr, info->base + UART_FCR);
+
+	spin_unlock_irqrestore(&info->slock, flags);
+	/* above added by shinhay */
+
+	wake_up_interruptible(&tty->write_wait);
+	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+		(tty->ldisc.write_wakeup) (tty);
+}
+
+static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	int retval;
+	struct async_icount cprev, cnow;	/* kernel counter temps */
+	struct serial_icounter_struct __user *p_cuser;
+	unsigned long templ;
+	unsigned long flags;
+	void __user *argp = (void __user *)arg;
+
+	if (tty->index == MXSER_PORTS)
+		return (mxser_ioctl_special(cmd, argp));
+
+	// following add by Victor Yu. 01-05-2004
+	if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
+		int opmode, p;
+		static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
+		int shiftbit;
+		unsigned char val, mask;
+
+		p = info->port % 4;
+		if (cmd == MOXA_SET_OP_MODE) {
+			if (get_user(opmode, (int __user *) argp))
+				return -EFAULT;
+			if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
+				return -EFAULT;
+			mask = ModeMask[p];
+			shiftbit = p * 2;
+			val = inb(info->opmode_ioaddr);
+			val &= mask;
+			val |= (opmode << shiftbit);
+			outb(val, info->opmode_ioaddr);
+		} else {
+			shiftbit = p * 2;
+			opmode = inb(info->opmode_ioaddr) >> shiftbit;
+			opmode &= OP_MODE_MASK;
+			if (copy_to_user(argp, &opmode, sizeof(int)))
+				return -EFAULT;
+		}
+		return 0;
+	}
+	// above add by Victor Yu. 01-05-2004
+
+	if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+		if (tty->flags & (1 << TTY_IO_ERROR))
+			return (-EIO);
+	}
+	switch (cmd) {
+	case TCSBRK:		/* SVID version: non-zero arg --> no break */
+		retval = tty_check_change(tty);
+		if (retval)
+			return (retval);
+		tty_wait_until_sent(tty, 0);
+		if (!arg)
+			mxser_send_break(info, HZ / 4);	/* 1/4 second */
+		return (0);
+	case TCSBRKP:		/* support for POSIX tcsendbreak() */
+		retval = tty_check_change(tty);
+		if (retval)
+			return (retval);
+		tty_wait_until_sent(tty, 0);
+		mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
+		return (0);
+	case TIOCGSOFTCAR:
+		return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
+	case TIOCSSOFTCAR:
+		if (get_user(templ, (unsigned long __user *) argp))
+			return -EFAULT;
+		arg = templ;
+		tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
+		return (0);
+	case TIOCGSERIAL:
+		return mxser_get_serial_info(info, argp);
+	case TIOCSSERIAL:
+		return mxser_set_serial_info(info, argp);
+	case TIOCSERGETLSR:	/* Get line status register */
+		return mxser_get_lsr_info(info, argp);
+		/*
+		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+		 * - mask passed in arg for lines of interest
+		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+		 * Caller should use TIOCGICOUNT to see which one it was
+		 */
+	case TIOCMIWAIT:{
+			DECLARE_WAITQUEUE(wait, current);
+			int ret;
+			spin_lock_irqsave(&info->slock, flags);
+			cprev = info->icount;	/* note the counters on entry */
+			spin_unlock_irqrestore(&info->slock, flags);
+
+			add_wait_queue(&info->delta_msr_wait, &wait);
+			while (1) {
+				spin_lock_irqsave(&info->slock, flags);
+				cnow = info->icount;	/* atomic copy */
+				spin_unlock_irqrestore(&info->slock, flags);
+
+				set_current_state(TASK_INTERRUPTIBLE);
+				if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
+					ret = 0;
+					break;
+				}
+				/* see if a signal did it */
+				if (signal_pending(current)) {
+					ret = -ERESTARTSYS;
+					break;
+				}
+				cprev = cnow;
+			}
+			current->state = TASK_RUNNING;
+			remove_wait_queue(&info->delta_msr_wait, &wait);
+			break;
+		}
+		/* NOTREACHED */
+		/*
+		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+		 * Return: write counters to the user passed counter struct
+		 * NB: both 1->0 and 0->1 transitions are counted except for
+		 *     RI where only 0->1 is counted.
+		 */
+	case TIOCGICOUNT:
+		spin_lock_irqsave(&info->slock, flags);
+		cnow = info->icount;
+		spin_unlock_irqrestore(&info->slock, flags);
+		p_cuser = argp;
+		/* modified by casper 1/11/2000 */
+		if (put_user(cnow.frame, &p_cuser->frame))
+			return -EFAULT;
+		if (put_user(cnow.brk, &p_cuser->brk))
+			return -EFAULT;
+		if (put_user(cnow.overrun, &p_cuser->overrun))
+			return -EFAULT;
+		if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
+			return -EFAULT;
+		if (put_user(cnow.parity, &p_cuser->parity))
+			return -EFAULT;
+		if (put_user(cnow.rx, &p_cuser->rx))
+			return -EFAULT;
+		if (put_user(cnow.tx, &p_cuser->tx))
+			return -EFAULT;
+		put_user(cnow.cts, &p_cuser->cts);
+		put_user(cnow.dsr, &p_cuser->dsr);
+		put_user(cnow.rng, &p_cuser->rng);
+		put_user(cnow.dcd, &p_cuser->dcd);
+
+/* */
+		return 0;
+	case MOXA_HighSpeedOn:
+		return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
+
+	case MOXA_SDS_RSTICOUNTER:{
+			info->mon_data.rxcnt = 0;
+			info->mon_data.txcnt = 0;
+			return 0;
+		}
+// (above) added by James.
+	case MOXA_ASPP_SETBAUD:{
+			long baud;
+			if (get_user(baud, (long __user *) argp))
+				return -EFAULT;
+			mxser_set_baud(info, baud);
+			return 0;
+		}
+	case MOXA_ASPP_GETBAUD:
+		if (copy_to_user(argp, &info->realbaud, sizeof(long)))
+			return -EFAULT;
+
+		return 0;
+
+	case MOXA_ASPP_OQUEUE:{
+			int len, lsr;
+
+			len = mxser_chars_in_buffer(tty);
+
+			lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
+
+			len += (lsr ? 0 : 1);
+
+			if (copy_to_user(argp, &len, sizeof(int)))
+				return -EFAULT;
+
+			return 0;
+		}
+	case MOXA_ASPP_MON:{
+			int mcr, status;
+//      info->mon_data.ser_param = tty->termios->c_cflag;
+
+			status = mxser_get_msr(info->base, 1, info->port, info);
+			mxser_check_modem_status(info, status);
+
+			mcr = inb(info->base + UART_MCR);
+			if (mcr & MOXA_MUST_MCR_XON_FLAG)
+				info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
+			else
+				info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
+
+			if (mcr & MOXA_MUST_MCR_TX_XON)
+				info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
+			else
+				info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
+
+			if (info->tty->hw_stopped)
+				info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
+			else
+				info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
+
+
+			if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
+				return -EFAULT;
+
+			return 0;
+
+		}
+
+	case MOXA_ASPP_LSTATUS:{
+			if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
+				return -EFAULT;
+
+			info->err_shadow = 0;
+			return 0;
+
+		}
+	case MOXA_SET_BAUD_METHOD:{
+			int method;
+			if (get_user(method, (int __user *) argp))
+				return -EFAULT;
+			mxser_set_baud_method[info->port] = method;
+			if (copy_to_user(argp, &method, sizeof(int)))
+				return -EFAULT;
+
+			return 0;
+		}
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+#ifndef CMSPAR
+#define	CMSPAR 010000000000
+#endif
+
+static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
+{
+	int i, result, status;
+
+	switch (cmd) {
+	case MOXA_GET_CONF:
+		if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
+			return -EFAULT;
+		return 0;
+	case MOXA_GET_MAJOR:
+		if (copy_to_user(argp, &ttymajor, sizeof(int)))
+			return -EFAULT;
+		return 0;
+
+	case MOXA_GET_CUMAJOR:
+		if (copy_to_user(argp, &calloutmajor, sizeof(int)))
+			return -EFAULT;
+		return 0;
+
+	case MOXA_CHKPORTENABLE:
+		result = 0;
+		for (i = 0; i < MXSER_PORTS; i++) {
+			if (mxvar_table[i].base)
+				result |= (1 << i);
+		}
+		return put_user(result, (unsigned long __user *) argp);
+	case MOXA_GETDATACOUNT:
+		if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
+			return -EFAULT;
+		return (0);
+	case MOXA_GETMSTATUS:
+		for (i = 0; i < MXSER_PORTS; i++) {
+			GMStatus[i].ri = 0;
+			if (!mxvar_table[i].base) {
+				GMStatus[i].dcd = 0;
+				GMStatus[i].dsr = 0;
+				GMStatus[i].cts = 0;
+				continue;
+			}
+
+			if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
+				GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
+			else
+				GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
+
+			status = inb(mxvar_table[i].base + UART_MSR);
+			if (status & 0x80 /*UART_MSR_DCD */ )
+				GMStatus[i].dcd = 1;
+			else
+				GMStatus[i].dcd = 0;
+
+			if (status & 0x20 /*UART_MSR_DSR */ )
+				GMStatus[i].dsr = 1;
+			else
+				GMStatus[i].dsr = 0;
+
+
+			if (status & 0x10 /*UART_MSR_CTS */ )
+				GMStatus[i].cts = 1;
+			else
+				GMStatus[i].cts = 0;
+		}
+		if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
+			return -EFAULT;
+		return 0;
+	case MOXA_ASPP_MON_EXT:{
+			int status;
+			int opmode, p;
+			int shiftbit;
+			unsigned cflag, iflag;
+
+			for (i = 0; i < MXSER_PORTS; i++) {
+
+				if (!mxvar_table[i].base)
+					continue;
+
+				status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
+//                      mxser_check_modem_status(&mxvar_table[i], status);
+				if (status & UART_MSR_TERI)
+					mxvar_table[i].icount.rng++;
+				if (status & UART_MSR_DDSR)
+					mxvar_table[i].icount.dsr++;
+				if (status & UART_MSR_DDCD)
+					mxvar_table[i].icount.dcd++;
+				if (status & UART_MSR_DCTS)
+					mxvar_table[i].icount.cts++;
+
+				mxvar_table[i].mon_data.modem_status = status;
+				mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
+				mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
+				mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
+				mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
+				mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
+				mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
+
+				if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
+					cflag = mxvar_table[i].normal_termios.c_cflag;
+					iflag = mxvar_table[i].normal_termios.c_iflag;
+				} else {
+					cflag = mxvar_table[i].tty->termios->c_cflag;
+					iflag = mxvar_table[i].tty->termios->c_iflag;
+				}
+
+				mon_data_ext.databits[i] = cflag & CSIZE;
+
+				mon_data_ext.stopbits[i] = cflag & CSTOPB;
+
+				mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
+
+				mon_data_ext.flowctrl[i] = 0x00;
+
+				if (cflag & CRTSCTS)
+					mon_data_ext.flowctrl[i] |= 0x03;
+
+				if (iflag & (IXON | IXOFF))
+					mon_data_ext.flowctrl[i] |= 0x0C;
+
+				if (mxvar_table[i].type == PORT_16550A)
+					mon_data_ext.fifo[i] = 1;
+				else
+					mon_data_ext.fifo[i] = 0;
+
+				p = i % 4;
+				shiftbit = p * 2;
+				opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
+				opmode &= OP_MODE_MASK;
+
+				mon_data_ext.iftype[i] = opmode;
+
+			}
+			if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
+				return -EFAULT;
+
+			return 0;
+
+		}
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+
+static void mxser_stoprx(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	//unsigned long flags;
+
+
+	info->ldisc_stop_rx = 1;
+	if (I_IXOFF(tty)) {
+
+		//MX_LOCK(&info->slock);
+		// following add by Victor Yu. 09-02-2002
+		if (info->IsMoxaMustChipFlag) {
+			info->IER &= ~MOXA_MUST_RECV_ISR;
+			outb(info->IER, info->base + UART_IER);
+		} else {
+			// above add by Victor Yu. 09-02-2002
+
+			info->x_char = STOP_CHAR(tty);
+			//      outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
+			outb(0, info->base + UART_IER);
+			info->IER |= UART_IER_THRI;
+			outb(info->IER, info->base + UART_IER);	/* force Tx interrupt */
+		}		// add by Victor Yu. 09-02-2002
+		//MX_UNLOCK(&info->slock);
+	}
+
+	if (info->tty->termios->c_cflag & CRTSCTS) {
+		//MX_LOCK(&info->slock);
+		info->MCR &= ~UART_MCR_RTS;
+		outb(info->MCR, info->base + UART_MCR);
+		//MX_UNLOCK(&info->slock);
+	}
+}
+
+static void mxser_startrx(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	//unsigned long flags;
+
+	info->ldisc_stop_rx = 0;
+	if (I_IXOFF(tty)) {
+		if (info->x_char)
+			info->x_char = 0;
+		else {
+			//MX_LOCK(&info->slock);
+
+			// following add by Victor Yu. 09-02-2002
+			if (info->IsMoxaMustChipFlag) {
+				info->IER |= MOXA_MUST_RECV_ISR;
+				outb(info->IER, info->base + UART_IER);
+			} else {
+				// above add by Victor Yu. 09-02-2002
+
+				info->x_char = START_CHAR(tty);
+				//          outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
+				outb(0, info->base + UART_IER);	// add by Victor Yu. 09-02-2002
+				info->IER |= UART_IER_THRI;	/* force Tx interrupt */
+				outb(info->IER, info->base + UART_IER);
+			}	// add by Victor Yu. 09-02-2002
+			//MX_UNLOCK(&info->slock);
+		}
+	}
+
+	if (info->tty->termios->c_cflag & CRTSCTS) {
+		//MX_LOCK(&info->slock);
+		info->MCR |= UART_MCR_RTS;
+		outb(info->MCR, info->base + UART_MCR);
+		//MX_UNLOCK(&info->slock);
+	}
+}
+
+/*
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ */
+static void mxser_throttle(struct tty_struct *tty)
+{
+	//struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
+	//unsigned long flags;
+	//MX_LOCK(&info->slock);
+	mxser_stoprx(tty);
+	//MX_UNLOCK(&info->slock);
+}
+
+static void mxser_unthrottle(struct tty_struct *tty)
+{
+	//struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
+	//unsigned long flags;
+	//MX_LOCK(&info->slock);
+	mxser_startrx(tty);
+	//MX_UNLOCK(&info->slock);
+}
+
+static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
+
+		mxser_change_speed(info, old_termios);
+
+		if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
+			tty->hw_stopped = 0;
+			mxser_start(tty);
+		}
+	}
+
+/* Handle sw stopped */
+	if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
+		tty->stopped = 0;
+
+		// following add by Victor Yu. 09-02-2002
+		if (info->IsMoxaMustChipFlag) {
+			spin_lock_irqsave(&info->slock, flags);
+			DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
+			spin_unlock_irqrestore(&info->slock, flags);
+		}
+		// above add by Victor Yu. 09-02-2002
+
+		mxser_start(tty);
+	}
+}
+
+/*
+ * mxser_stop() and mxser_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ */
+static void mxser_stop(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+	if (info->IER & UART_IER_THRI) {
+		info->IER &= ~UART_IER_THRI;
+		outb(info->IER, info->base + UART_IER);
+	}
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static void mxser_start(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+	if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
+		info->IER |= UART_IER_THRI;
+		outb(info->IER, info->base + UART_IER);
+	}
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+/*
+ * mxser_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long orig_jiffies, char_time;
+	int lsr;
+
+	if (info->type == PORT_UNKNOWN)
+		return;
+
+	if (info->xmit_fifo_size == 0)
+		return;		/* Just in case.... */
+
+	orig_jiffies = jiffies;
+	/*
+	 * Set the check interval to be 1/5 of the estimated time to
+	 * send a single character, and make it at least 1.  The check
+	 * interval should also be less than the timeout.
+	 *
+	 * Note: we have to use pretty tight timings here to satisfy
+	 * the NIST-PCTS.
+	 */
+	char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+	char_time = char_time / 5;
+	if (char_time == 0)
+		char_time = 1;
+	if (timeout && timeout < char_time)
+		char_time = timeout;
+	/*
+	 * If the transmitter hasn't cleared in twice the approximate
+	 * amount of time to send the entire FIFO, it probably won't
+	 * ever clear.  This assumes the UART isn't doing flow
+	 * control, which is currently the case.  Hence, if it ever
+	 * takes longer than info->timeout, this is probably due to a
+	 * UART bug of some kind.  So, we clamp the timeout parameter at
+	 * 2*info->timeout.
+	 */
+	if (!timeout || timeout > 2 * info->timeout)
+		timeout = 2 * info->timeout;
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+	printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
+	printk("jiff=%lu...", jiffies);
+#endif
+	while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+		printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
+#endif
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(char_time);
+		if (signal_pending(current))
+			break;
+		if (timeout && time_after(jiffies, orig_jiffies + timeout))
+			break;
+	}
+	set_current_state(TASK_RUNNING);
+
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+	printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+#endif
+}
+
+
+/*
+ * This routine is called by tty_hangup() when a hangup is signaled.
+ */
+void mxser_hangup(struct tty_struct *tty)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+
+	mxser_flush_buffer(tty);
+	mxser_shutdown(info);
+	info->event = 0;
+	info->count = 0;
+	info->flags &= ~ASYNC_NORMAL_ACTIVE;
+	info->tty = NULL;
+	wake_up_interruptible(&info->open_wait);
+}
+
+
+// added by James 03-12-2004.
+/*
+ * mxser_rs_break() --- routine which turns the break handling on or off
+ */
+static void mxser_rs_break(struct tty_struct *tty, int break_state)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+	if (break_state == -1)
+		outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
+	else
+		outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+// (above) added by James.
+
+
+/*
+ * This is the serial driver's generic interrupt routine
+ */
+static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	int status, iir, i;
+	struct mxser_struct *info;
+	struct mxser_struct *port;
+	int max, irqbits, bits, msr;
+	int pass_counter = 0;
+	int handled = IRQ_NONE;
+
+	port = NULL;
+	//spin_lock(&gm_lock);
+
+	for (i = 0; i < MXSER_BOARDS; i++) {
+		if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
+			port = dev_id;
+			break;
+		}
+	}
+
+	if (i == MXSER_BOARDS) {
+		goto irq_stop;
+	}
+	if (port == 0) {
+		goto irq_stop;
+	}
+	max = mxser_numports[mxsercfg[i].board_type - 1];
+	while (1) {
+		irqbits = inb(port->vector) & port->vectormask;
+		if (irqbits == port->vectormask) {
+			break;
+		}
+
+		handled = IRQ_HANDLED;
+		for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
+			if (irqbits == port->vectormask) {
+				break;
+			}
+			if (bits & irqbits)
+				continue;
+			info = port + i;
+
+			// following add by Victor Yu. 09-13-2002
+			iir = inb(info->base + UART_IIR);
+			if (iir & UART_IIR_NO_INT)
+				continue;
+			iir &= MOXA_MUST_IIR_MASK;
+			if (!info->tty) {
+				status = inb(info->base + UART_LSR);
+				outb(0x27, info->base + UART_FCR);
+				inb(info->base + UART_MSR);
+				continue;
+			}
+			// above add by Victor Yu. 09-13-2002
+			/*
+			   if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
+			   info->IER |= MOXA_MUST_RECV_ISR;
+			   outb(info->IER, info->base + UART_IER);
+			   }
+			 */
+
+
+			/* mask by Victor Yu. 09-13-2002
+			   if ( !info->tty ||
+			   (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
+			   continue;
+			 */
+			/* mask by Victor Yu. 09-02-2002
+			   status = inb(info->base + UART_LSR) & info->read_status_mask;
+			 */
+
+			// following add by Victor Yu. 09-02-2002
+			status = inb(info->base + UART_LSR);
+
+			if (status & UART_LSR_PE) {
+				info->err_shadow |= NPPI_NOTIFY_PARITY;
+			}
+			if (status & UART_LSR_FE) {
+				info->err_shadow |= NPPI_NOTIFY_FRAMING;
+			}
+			if (status & UART_LSR_OE) {
+				info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
+			}
+			if (status & UART_LSR_BI)
+				info->err_shadow |= NPPI_NOTIFY_BREAK;
+
+			if (info->IsMoxaMustChipFlag) {
+				/*
+				   if ( (status & 0x02) && !(status & 0x01) ) {
+				   outb(info->base+UART_FCR,  0x23);
+				   continue;
+				   }
+				 */
+				if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
+					mxser_receive_chars(info, &status);
+
+			} else {
+				// above add by Victor Yu. 09-02-2002
+
+				status &= info->read_status_mask;
+				if (status & UART_LSR_DR)
+					mxser_receive_chars(info, &status);
+			}
+			msr = inb(info->base + UART_MSR);
+			if (msr & UART_MSR_ANY_DELTA) {
+				mxser_check_modem_status(info, msr);
+			}
+			// following add by Victor Yu. 09-13-2002
+			if (info->IsMoxaMustChipFlag) {
+				if ((iir == 0x02) && (status & UART_LSR_THRE)) {
+					mxser_transmit_chars(info);
+				}
+			} else {
+				// above add by Victor Yu. 09-13-2002
+
+				if (status & UART_LSR_THRE) {
+/* 8-2-99 by William
+			    if ( info->x_char || (info->xmit_cnt > 0) )
+*/
+					mxser_transmit_chars(info);
+				}
+			}
+		}
+		if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
+			break;	/* Prevent infinite loops */
+		}
+	}
+
+      irq_stop:
+	//spin_unlock(&gm_lock);
+	return handled;
+}
+
+static void mxser_receive_chars(struct mxser_struct *info, int *status)
+{
+	struct tty_struct *tty = info->tty;
+	unsigned char ch, gdl;
+	int ignored = 0;
+	int cnt = 0;
+	unsigned char *cp;
+	char *fp;
+	int count;
+	int recv_room;
+	int max = 256;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	recv_room = tty->ldisc.receive_room(tty);
+	if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
+		//mxser_throttle(tty);
+		mxser_stoprx(tty);
+		//return;
+	}
+
+	cp = tty->flip.char_buf;
+	fp = tty->flip.flag_buf;
+	count = 0;
+
+	// following add by Victor Yu. 09-02-2002
+	if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
+
+		if (*status & UART_LSR_SPECIAL) {
+			goto intr_old;
+		}
+		// following add by Victor Yu. 02-11-2004
+		if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
+			goto intr_old;
+		// above add by Victor Yu. 02-14-2004
+		if (*status & MOXA_MUST_LSR_RERR)
+			goto intr_old;
+
+		gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
+
+		if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)	// add by Victor Yu. 02-11-2004
+			gdl &= MOXA_MUST_GDL_MASK;
+		if (gdl >= recv_room) {
+			if (!info->ldisc_stop_rx) {
+				//mxser_throttle(tty);
+				mxser_stoprx(tty);
+			}
+			//return;
+		}
+		while (gdl--) {
+			ch = inb(info->base + UART_RX);
+			count++;
+			*cp++ = ch;
+			*fp++ = 0;
+			cnt++;
+			/*
+			   if((count>=HI_WATER) && (info->stop_rx==0)){
+			   mxser_stoprx(tty);
+			   info->stop_rx=1;
+			   break;
+			   } */
+		}
+		goto end_intr;
+	}
+intr_old:
+	// above add by Victor Yu. 09-02-2002
+
+	do {
+		if (max-- < 0)
+			break;
+		/*
+		   if((count>=HI_WATER) && (info->stop_rx==0)){
+		   mxser_stoprx(tty);
+		   info->stop_rx=1;
+		   break;
+		   }
+		 */
+
+		ch = inb(info->base + UART_RX);
+		// following add by Victor Yu. 09-02-2002
+		if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
+			outb(0x23, info->base + UART_FCR);
+		*status &= info->read_status_mask;
+		// above add by Victor Yu. 09-02-2002
+		if (*status & info->ignore_status_mask) {
+			if (++ignored > 100)
+				break;
+		} else {
+			count++;
+			if (*status & UART_LSR_SPECIAL) {
+				if (*status & UART_LSR_BI) {
+					*fp++ = TTY_BREAK;
+/* added by casper 1/11/2000 */
+					info->icount.brk++;
+
+/* */
+					if (info->flags & ASYNC_SAK)
+						do_SAK(tty);
+				} else if (*status & UART_LSR_PE) {
+					*fp++ = TTY_PARITY;
+/* added by casper 1/11/2000 */
+					info->icount.parity++;
+/* */
+				} else if (*status & UART_LSR_FE) {
+					*fp++ = TTY_FRAME;
+/* added by casper 1/11/2000 */
+					info->icount.frame++;
+/* */
+				} else if (*status & UART_LSR_OE) {
+					*fp++ = TTY_OVERRUN;
+/* added by casper 1/11/2000 */
+					info->icount.overrun++;
+/* */
+				} else
+					*fp++ = 0;
+			} else
+				*fp++ = 0;
+			*cp++ = ch;
+			cnt++;
+			if (cnt >= recv_room) {
+				if (!info->ldisc_stop_rx) {
+					//mxser_throttle(tty);
+					mxser_stoprx(tty);
+				}
+				break;
+			}
+
+		}
+
+		// following add by Victor Yu. 09-02-2002
+		if (info->IsMoxaMustChipFlag)
+			break;
+		// above add by Victor Yu. 09-02-2002
+
+		/* mask by Victor Yu. 09-02-2002
+		 *status = inb(info->base + UART_LSR) & info->read_status_mask;
+		 */
+		// following add by Victor Yu. 09-02-2002
+		*status = inb(info->base + UART_LSR);
+		// above add by Victor Yu. 09-02-2002
+	} while (*status & UART_LSR_DR);
+
+      end_intr:		// add by Victor Yu. 09-02-2002
+
+	mxvar_log.rxcnt[info->port] += cnt;
+	info->mon_data.rxcnt += cnt;
+	info->mon_data.up_rxcnt += cnt;
+	spin_unlock_irqrestore(&info->slock, flags);
+	
+	tty_flip_buffer_push(tty);
+}
+
+static void mxser_transmit_chars(struct mxser_struct *info)
+{
+	int count, cnt;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	if (info->x_char) {
+		outb(info->x_char, info->base + UART_TX);
+		info->x_char = 0;
+		mxvar_log.txcnt[info->port]++;
+		info->mon_data.txcnt++;
+		info->mon_data.up_txcnt++;
+
+/* added by casper 1/11/2000 */
+		info->icount.tx++;
+/* */
+		spin_unlock_irqrestore(&info->slock, flags);
+		return;
+	}
+
+	if (info->xmit_buf == 0) {
+		spin_unlock_irqrestore(&info->slock, flags);
+		return;
+	}
+
+	if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
+		info->IER &= ~UART_IER_THRI;
+		outb(info->IER, info->base + UART_IER);
+		spin_unlock_irqrestore(&info->slock, flags);
+		return;
+	}
+
+	cnt = info->xmit_cnt;
+	count = info->xmit_fifo_size;
+	do {
+		outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
+		info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
+		if (--info->xmit_cnt <= 0)
+			break;
+	} while (--count > 0);
+	mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
+
+// added by James 03-12-2004.
+	info->mon_data.txcnt += (cnt - info->xmit_cnt);
+	info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
+// (above) added by James.
+
+/* added by casper 1/11/2000 */
+	info->icount.tx += (cnt - info->xmit_cnt);
+/* */
+
+	if (info->xmit_cnt < WAKEUP_CHARS) {
+		set_bit(MXSER_EVENT_TXLOW, &info->event);
+		schedule_work(&info->tqueue);
+	}
+	if (info->xmit_cnt <= 0) {
+		info->IER &= ~UART_IER_THRI;
+		outb(info->IER, info->base + UART_IER);
+	}
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static void mxser_check_modem_status(struct mxser_struct *info, int status)
+{
+	/* update input line counters */
+	if (status & UART_MSR_TERI)
+		info->icount.rng++;
+	if (status & UART_MSR_DDSR)
+		info->icount.dsr++;
+	if (status & UART_MSR_DDCD)
+		info->icount.dcd++;
+	if (status & UART_MSR_DCTS)
+		info->icount.cts++;
+	info->mon_data.modem_status = status;
+	wake_up_interruptible(&info->delta_msr_wait);
+
+
+	if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
+		if (status & UART_MSR_DCD)
+			wake_up_interruptible(&info->open_wait);
+		schedule_work(&info->tqueue);
+	}
+
+	if (info->flags & ASYNC_CTS_FLOW) {
+		if (info->tty->hw_stopped) {
+			if (status & UART_MSR_CTS) {
+				info->tty->hw_stopped = 0;
+
+				if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
+					info->IER |= UART_IER_THRI;
+					outb(info->IER, info->base + UART_IER);
+				}
+				set_bit(MXSER_EVENT_TXLOW, &info->event);
+				schedule_work(&info->tqueue);			}
+		} else {
+			if (!(status & UART_MSR_CTS)) {
+				info->tty->hw_stopped = 1;
+				if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
+					info->IER &= ~UART_IER_THRI;
+					outb(info->IER, info->base + UART_IER);
+				}
+			}
+		}
+	}
+}
+
+static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	int retval;
+	int do_clocal = 0;
+	unsigned long flags;
+
+	/*
+	 * If non-blocking mode is set, or the port is not enabled,
+	 * then make the check up front and then exit.
+	 */
+	if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
+		info->flags |= ASYNC_NORMAL_ACTIVE;
+		return (0);
+	}
+
+	if (tty->termios->c_cflag & CLOCAL)
+		do_clocal = 1;
+
+	/*
+	 * Block waiting for the carrier detect and the line to become
+	 * free (i.e., not in use by the callout).  While we are in
+	 * this loop, info->count is dropped by one, so that
+	 * mxser_close() knows when to free things.  We restore it upon
+	 * exit, either normal or abnormal.
+	 */
+	retval = 0;
+	add_wait_queue(&info->open_wait, &wait);
+
+	spin_lock_irqsave(&info->slock, flags);
+	if (!tty_hung_up_p(filp))
+		info->count--;
+	spin_unlock_irqrestore(&info->slock, flags);
+	info->blocked_open++;
+	while (1) {
+		spin_lock_irqsave(&info->slock, flags);
+		outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
+		spin_unlock_irqrestore(&info->slock, flags);
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
+			if (info->flags & ASYNC_HUP_NOTIFY)
+				retval = -EAGAIN;
+			else
+				retval = -ERESTARTSYS;
+			break;
+		}
+		if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
+			break;
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		schedule();
+	}
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&info->open_wait, &wait);
+	if (!tty_hung_up_p(filp))
+		info->count++;
+	info->blocked_open--;
+	if (retval)
+		return (retval);
+	info->flags |= ASYNC_NORMAL_ACTIVE;
+	return (0);
+}
+
+static int mxser_startup(struct mxser_struct *info)
+{
+
+	unsigned long page;
+	unsigned long flags;
+
+	page = __get_free_page(GFP_KERNEL);
+	if (!page)
+		return (-ENOMEM);
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	if (info->flags & ASYNC_INITIALIZED) {
+		free_page(page);
+		spin_unlock_irqrestore(&info->slock, flags);
+		return (0);
+	}
+
+	if (!info->base || !info->type) {
+		if (info->tty)
+			set_bit(TTY_IO_ERROR, &info->tty->flags);
+		free_page(page);
+		spin_unlock_irqrestore(&info->slock, flags);
+		return (0);
+	}
+	if (info->xmit_buf)
+		free_page(page);
+	else
+		info->xmit_buf = (unsigned char *) page;
+
+	/*
+	 * Clear the FIFO buffers and disable them
+	 * (they will be reenabled in mxser_change_speed())
+	 */
+	if (info->IsMoxaMustChipFlag)
+		outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
+	else
+		outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
+
+	/*
+	 * At this point there's no way the LSR could still be 0xFF;
+	 * if it is, then bail out, because there's likely no UART
+	 * here.
+	 */
+	if (inb(info->base + UART_LSR) == 0xff) {
+		spin_unlock_irqrestore(&info->slock, flags);
+		if (capable(CAP_SYS_ADMIN)) {
+			if (info->tty)
+				set_bit(TTY_IO_ERROR, &info->tty->flags);
+			return (0);
+		} else
+			return (-ENODEV);
+	}
+
+	/*
+	 * Clear the interrupt registers.
+	 */
+	(void) inb(info->base + UART_LSR);
+	(void) inb(info->base + UART_RX);
+	(void) inb(info->base + UART_IIR);
+	(void) inb(info->base + UART_MSR);
+
+	/*
+	 * Now, initialize the UART
+	 */
+	outb(UART_LCR_WLEN8, info->base + UART_LCR);	/* reset DLAB */
+	info->MCR = UART_MCR_DTR | UART_MCR_RTS;
+	outb(info->MCR, info->base + UART_MCR);
+
+	/*
+	 * Finally, enable interrupts
+	 */
+	info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+//      info->IER = UART_IER_RLSI | UART_IER_RDI;
+
+	// following add by Victor Yu. 08-30-2002
+	if (info->IsMoxaMustChipFlag)
+		info->IER |= MOXA_MUST_IER_EGDAI;
+	// above add by Victor Yu. 08-30-2002
+	outb(info->IER, info->base + UART_IER);	/* enable interrupts */
+
+	/*
+	 * And clear the interrupt registers again for luck.
+	 */
+	(void) inb(info->base + UART_LSR);
+	(void) inb(info->base + UART_RX);
+	(void) inb(info->base + UART_IIR);
+	(void) inb(info->base + UART_MSR);
+
+	if (info->tty)
+		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+	/*
+	 * and set the speed of the serial port
+	 */
+	spin_unlock_irqrestore(&info->slock, flags);
+	mxser_change_speed(info, NULL);
+
+	info->flags |= ASYNC_INITIALIZED;
+	return (0);
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts maybe disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void mxser_shutdown(struct mxser_struct *info)
+{
+	unsigned long flags;
+
+	if (!(info->flags & ASYNC_INITIALIZED))
+		return;
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	/*
+	 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+	 * here so the queue might never be waken up
+	 */
+	wake_up_interruptible(&info->delta_msr_wait);
+
+	/*
+	 * Free the IRQ, if necessary
+	 */
+	if (info->xmit_buf) {
+		free_page((unsigned long) info->xmit_buf);
+		info->xmit_buf = NULL;
+	}
+
+	info->IER = 0;
+	outb(0x00, info->base + UART_IER);
+
+	if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+		info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
+	outb(info->MCR, info->base + UART_MCR);
+
+	/* clear Rx/Tx FIFO's */
+	// following add by Victor Yu. 08-30-2002
+	if (info->IsMoxaMustChipFlag)
+		outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
+	else
+		// above add by Victor Yu. 08-30-2002
+		outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
+
+	/* read data port to reset things */
+	(void) inb(info->base + UART_RX);
+
+	if (info->tty)
+		set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+	info->flags &= ~ASYNC_INITIALIZED;
+
+	// following add by Victor Yu. 09-23-2002
+	if (info->IsMoxaMustChipFlag) {
+		SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
+	}
+	// above add by Victor Yu. 09-23-2002
+
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
+{
+	unsigned cflag, cval, fcr;
+	int ret = 0;
+	unsigned char status;
+	long baud;
+	unsigned long flags;
+
+
+	if (!info->tty || !info->tty->termios)
+		return ret;
+	cflag = info->tty->termios->c_cflag;
+	if (!(info->base))
+		return ret;
+
+
+#ifndef B921600
+#define B921600 (B460800 +1)
+#endif
+	if (mxser_set_baud_method[info->port] == 0) {
+		switch (cflag & (CBAUD | CBAUDEX)) {
+		case B921600:
+			baud = 921600;
+			break;
+		case B460800:
+			baud = 460800;
+			break;
+		case B230400:
+			baud = 230400;
+			break;
+		case B115200:
+			baud = 115200;
+			break;
+		case B57600:
+			baud = 57600;
+			break;
+		case B38400:
+			baud = 38400;
+			break;
+		case B19200:
+			baud = 19200;
+			break;
+		case B9600:
+			baud = 9600;
+			break;
+		case B4800:
+			baud = 4800;
+			break;
+		case B2400:
+			baud = 2400;
+			break;
+		case B1800:
+			baud = 1800;
+			break;
+		case B1200:
+			baud = 1200;
+			break;
+		case B600:
+			baud = 600;
+			break;
+		case B300:
+			baud = 300;
+			break;
+		case B200:
+			baud = 200;
+			break;
+		case B150:
+			baud = 150;
+			break;
+		case B134:
+			baud = 134;
+			break;
+		case B110:
+			baud = 110;
+			break;
+		case B75:
+			baud = 75;
+			break;
+		case B50:
+			baud = 50;
+			break;
+		default:
+			baud = 0;
+			break;
+		}
+		mxser_set_baud(info, baud);
+	}
+
+	/* byte size and parity */
+	switch (cflag & CSIZE) {
+	case CS5:
+		cval = 0x00;
+		break;
+	case CS6:
+		cval = 0x01;
+		break;
+	case CS7:
+		cval = 0x02;
+		break;
+	case CS8:
+		cval = 0x03;
+		break;
+	default:
+		cval = 0x00;
+		break;		/* too keep GCC shut... */
+	}
+	if (cflag & CSTOPB)
+		cval |= 0x04;
+	if (cflag & PARENB)
+		cval |= UART_LCR_PARITY;
+	if (!(cflag & PARODD)) {
+		cval |= UART_LCR_EPAR;
+	}
+	if (cflag & CMSPAR)
+		cval |= UART_LCR_SPAR;
+
+	if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
+		if (info->IsMoxaMustChipFlag) {
+			fcr = UART_FCR_ENABLE_FIFO;
+			fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
+			SET_MOXA_MUST_FIFO_VALUE(info);
+		} else
+			fcr = 0;
+	} else {
+		fcr = UART_FCR_ENABLE_FIFO;
+		// following add by Victor Yu. 08-30-2002
+		if (info->IsMoxaMustChipFlag) {
+			fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
+			SET_MOXA_MUST_FIFO_VALUE(info);
+		} else {
+			// above add by Victor Yu. 08-30-2002
+
+			switch (info->rx_trigger) {
+			case 1:
+				fcr |= UART_FCR_TRIGGER_1;
+				break;
+			case 4:
+				fcr |= UART_FCR_TRIGGER_4;
+				break;
+			case 8:
+				fcr |= UART_FCR_TRIGGER_8;
+				break;
+			default:
+				fcr |= UART_FCR_TRIGGER_14;
+				break;
+			}
+		}
+	}
+
+	/* CTS flow control flag and modem status interrupts */
+	info->IER &= ~UART_IER_MSI;
+	info->MCR &= ~UART_MCR_AFE;
+	if (cflag & CRTSCTS) {
+		info->flags |= ASYNC_CTS_FLOW;
+		info->IER |= UART_IER_MSI;
+		if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
+			info->MCR |= UART_MCR_AFE;
+			//status = mxser_get_msr(info->base, 0, info->port);
+/*	save_flags(flags);
+	cli();
+	status = inb(baseaddr + UART_MSR);
+	restore_flags(flags);*/
+			//mxser_check_modem_status(info, status);
+		} else {
+			//status = mxser_get_msr(info->base, 0, info->port);
+
+			//MX_LOCK(&info->slock);
+			status = inb(info->base + UART_MSR);
+			//MX_UNLOCK(&info->slock);
+			if (info->tty->hw_stopped) {
+				if (status & UART_MSR_CTS) {
+					info->tty->hw_stopped = 0;
+					if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
+						info->IER |= UART_IER_THRI;
+						outb(info->IER, info->base + UART_IER);
+					}
+					set_bit(MXSER_EVENT_TXLOW, &info->event);
+					schedule_work(&info->tqueue);				}
+			} else {
+				if (!(status & UART_MSR_CTS)) {
+					info->tty->hw_stopped = 1;
+					if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
+						info->IER &= ~UART_IER_THRI;
+						outb(info->IER, info->base + UART_IER);
+					}
+				}
+			}
+		}
+	} else {
+		info->flags &= ~ASYNC_CTS_FLOW;
+	}
+	outb(info->MCR, info->base + UART_MCR);
+	if (cflag & CLOCAL) {
+		info->flags &= ~ASYNC_CHECK_CD;
+	} else {
+		info->flags |= ASYNC_CHECK_CD;
+		info->IER |= UART_IER_MSI;
+	}
+	outb(info->IER, info->base + UART_IER);
+
+	/*
+	 * Set up parity check flag
+	 */
+	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+	if (I_INPCK(info->tty))
+		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+		info->read_status_mask |= UART_LSR_BI;
+
+	info->ignore_status_mask = 0;
+
+	if (I_IGNBRK(info->tty)) {
+		info->ignore_status_mask |= UART_LSR_BI;
+		info->read_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignore parity and break indicators, ignore
+		 * overruns too.  (For real raw support).
+		 */
+		if (I_IGNPAR(info->tty)) {
+			info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
+			info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
+		}
+	}
+	// following add by Victor Yu. 09-02-2002
+	if (info->IsMoxaMustChipFlag) {
+		spin_lock_irqsave(&info->slock, flags);
+		SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
+		SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
+		if (I_IXON(info->tty)) {
+			ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
+		} else {
+			DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
+		}
+		if (I_IXOFF(info->tty)) {
+			ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
+		} else {
+			DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
+		}
+		/*
+		   if ( I_IXANY(info->tty) ) {
+		   info->MCR |= MOXA_MUST_MCR_XON_ANY;
+		   ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
+		   } else {
+		   info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
+		   DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
+		   }
+		 */
+		spin_unlock_irqrestore(&info->slock, flags);
+	}
+	// above add by Victor Yu. 09-02-2002
+
+
+	outb(fcr, info->base + UART_FCR);	/* set fcr */
+	outb(cval, info->base + UART_LCR);
+
+	return ret;
+}
+
+
+static int mxser_set_baud(struct mxser_struct *info, long newspd)
+{
+	int quot = 0;
+	unsigned char cval;
+	int ret = 0;
+	unsigned long flags;
+
+	if (!info->tty || !info->tty->termios)
+		return ret;
+
+	if (!(info->base))
+		return ret;
+
+	if (newspd > info->MaxCanSetBaudRate)
+		return 0;
+
+	info->realbaud = newspd;
+	if (newspd == 134) {
+		quot = (2 * info->baud_base / 269);
+	} else if (newspd) {
+		quot = info->baud_base / newspd;
+
+		if (quot == 0)
+			quot = 1;
+
+	} else {
+		quot = 0;
+	}
+
+	info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
+	info->timeout += HZ / 50;	/* Add .02 seconds of slop */
+
+	if (quot) {
+		spin_lock_irqsave(&info->slock, flags);
+		info->MCR |= UART_MCR_DTR;
+		outb(info->MCR, info->base + UART_MCR);
+		spin_unlock_irqrestore(&info->slock, flags);
+	} else {
+		spin_lock_irqsave(&info->slock, flags);
+		info->MCR &= ~UART_MCR_DTR;
+		outb(info->MCR, info->base + UART_MCR);
+		spin_unlock_irqrestore(&info->slock, flags);
+		return ret;
+	}
+
+	cval = inb(info->base + UART_LCR);
+
+	outb(cval | UART_LCR_DLAB, info->base + UART_LCR);	/* set DLAB */
+
+	outb(quot & 0xff, info->base + UART_DLL);	/* LS of divisor */
+	outb(quot >> 8, info->base + UART_DLM);	/* MS of divisor */
+	outb(cval, info->base + UART_LCR);	/* reset DLAB */
+
+
+	return ret;
+}
+
+
+
+/*
+ * ------------------------------------------------------------
+ * friends of mxser_ioctl()
+ * ------------------------------------------------------------
+ */
+static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
+{
+	struct serial_struct tmp;
+
+	if (!retinfo)
+		return (-EFAULT);
+	memset(&tmp, 0, sizeof(tmp));
+	tmp.type = info->type;
+	tmp.line = info->port;
+	tmp.port = info->base;
+	tmp.irq = info->irq;
+	tmp.flags = info->flags;
+	tmp.baud_base = info->baud_base;
+	tmp.close_delay = info->close_delay;
+	tmp.closing_wait = info->closing_wait;
+	tmp.custom_divisor = info->custom_divisor;
+	tmp.hub6 = 0;
+	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+		return -EFAULT;
+	return (0);
+}
+
+static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
+{
+	struct serial_struct new_serial;
+	unsigned int flags;
+	int retval = 0;
+
+	if (!new_info || !info->base)
+		return (-EFAULT);
+	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+		return -EFAULT;
+
+	if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
+		return (-EPERM);
+
+	flags = info->flags & ASYNC_SPD_MASK;
+
+	if (!capable(CAP_SYS_ADMIN)) {
+		if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
+			return (-EPERM);
+		info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
+	} else {
+		/*
+		 * OK, past this point, all the error checking has been done.
+		 * At this point, we start making changes.....
+		 */
+		info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
+		info->close_delay = new_serial.close_delay * HZ / 100;
+		info->closing_wait = new_serial.closing_wait * HZ / 100;
+		info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+		info->tty->low_latency = 0;	//(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	}
+
+	/* added by casper, 3/17/2000, for mouse */
+	info->type = new_serial.type;
+
+	process_txrx_fifo(info);
+
+	/* */
+	if (info->flags & ASYNC_INITIALIZED) {
+		if (flags != (info->flags & ASYNC_SPD_MASK)) {
+			mxser_change_speed(info, NULL);
+		}
+	} else {
+		retval = mxser_startup(info);
+	}
+	return (retval);
+}
+
+/*
+ * mxser_get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ *	    is emptied.  On bus types like RS485, the transmitter must
+ *	    release the bus after transmitting. This must be done when
+ *	    the transmit shift register is empty, not be done when the
+ *	    transmit holding register is empty.  This functionality
+ *	    allows an RS485 driver to be written in user space.
+ */
+static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
+{
+	unsigned char status;
+	unsigned int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->slock, flags);
+	status = inb(info->base + UART_LSR);
+	spin_unlock_irqrestore(&info->slock, flags);
+	result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
+	return put_user(result, value);
+}
+
+/*
+ * This routine sends a break character out the serial port.
+ */
+static void mxser_send_break(struct mxser_struct *info, int duration)
+{
+	unsigned long flags;
+
+	if (!info->base)
+		return;
+	set_current_state(TASK_INTERRUPTIBLE);
+	spin_lock_irqsave(&info->slock, flags);
+	outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
+	spin_unlock_irqrestore(&info->slock, flags);
+	schedule_timeout(duration);
+	spin_lock_irqsave(&info->slock, flags);
+	outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
+	spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned char control, status;
+	unsigned long flags;
+
+
+	if (tty->index == MXSER_PORTS)
+		return (-ENOIOCTLCMD);
+	if (tty->flags & (1 << TTY_IO_ERROR))
+		return (-EIO);
+
+	control = info->MCR;
+
+	spin_lock_irqsave(&info->slock, flags);
+	status = inb(info->base + UART_MSR);
+	if (status & UART_MSR_ANY_DELTA)
+		mxser_check_modem_status(info, status);
+	spin_unlock_irqrestore(&info->slock, flags);
+	return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
+	    ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
+}
+
+static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
+{
+	struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
+	unsigned long flags;
+
+
+	if (tty->index == MXSER_PORTS)
+		return -ENOIOCTLCMD;
+	if (tty->flags & (1 << TTY_IO_ERROR))
+		return -EIO;
+
+	spin_lock_irqsave(&info->slock, flags);
+
+	if (set & TIOCM_RTS)
+		info->MCR |= UART_MCR_RTS;
+	if (set & TIOCM_DTR)
+		info->MCR |= UART_MCR_DTR;
+
+	if (clear & TIOCM_RTS)
+		info->MCR &= ~UART_MCR_RTS;
+	if (clear & TIOCM_DTR)
+		info->MCR &= ~UART_MCR_DTR;
+
+	outb(info->MCR, info->base + UART_MCR);
+	spin_unlock_irqrestore(&info->slock, flags);
+	return 0;
+}
+
+
+static int mxser_read_register(int, unsigned short *);
+static int mxser_program_mode(int);
+static void mxser_normal_mode(int);
+
+static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
+{
+	int id, i, bits;
+	unsigned short regs[16], irq;
+	unsigned char scratch, scratch2;
+
+	hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
+
+	id = mxser_read_register(cap, regs);
+	if (id == C168_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_C168_ISA;
+		hwconf->ports = 8;
+	} else if (id == C104_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_C104_ISA;
+		hwconf->ports = 4;
+	} else if (id == C102_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_C102_ISA;
+		hwconf->ports = 2;
+	} else if (id == CI132_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_CI132;
+		hwconf->ports = 2;
+	} else if (id == CI134_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_CI134;
+		hwconf->ports = 4;
+	} else if (id == CI104J_ASIC_ID) {
+		hwconf->board_type = MXSER_BOARD_CI104J;
+		hwconf->ports = 4;
+	} else
+		return (0);
+
+	irq = 0;
+	if (hwconf->ports == 2) {
+		irq = regs[9] & 0xF000;
+		irq = irq | (irq >> 4);
+		if (irq != (regs[9] & 0xFF00))
+			return (MXSER_ERR_IRQ_CONFLIT);
+	} else if (hwconf->ports == 4) {
+		irq = regs[9] & 0xF000;
+		irq = irq | (irq >> 4);
+		irq = irq | (irq >> 8);
+		if (irq != regs[9])
+			return (MXSER_ERR_IRQ_CONFLIT);
+	} else if (hwconf->ports == 8) {
+		irq = regs[9] & 0xF000;
+		irq = irq | (irq >> 4);
+		irq = irq | (irq >> 8);
+		if ((irq != regs[9]) || (irq != regs[10]))
+			return (MXSER_ERR_IRQ_CONFLIT);
+	}
+
+	if (!irq) {
+		return (MXSER_ERR_IRQ);
+	}
+	hwconf->irq = ((int) (irq & 0xF000) >> 12);
+	for (i = 0; i < 8; i++)
+		hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
+	if ((regs[12] & 0x80) == 0) {
+		return (MXSER_ERR_VECTOR);
+	}
+	hwconf->vector = (int) regs[11];	/* interrupt vector */
+	if (id == 1)
+		hwconf->vector_mask = 0x00FF;
+	else
+		hwconf->vector_mask = 0x000F;
+	for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
+		if (regs[12] & bits) {
+			hwconf->baud_base[i] = 921600;
+			hwconf->MaxCanSetBaudRate[i] = 921600;	// add by Victor Yu. 09-04-2002
+		} else {
+			hwconf->baud_base[i] = 115200;
+			hwconf->MaxCanSetBaudRate[i] = 115200;	// add by Victor Yu. 09-04-2002
+		}
+	}
+	scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
+	outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
+	outb(0, cap + UART_EFR);	/* EFR is the same as FCR */
+	outb(scratch2, cap + UART_LCR);
+	outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
+	scratch = inb(cap + UART_IIR);
+
+	if (scratch & 0xC0)
+		hwconf->uart_type = PORT_16550A;
+	else
+		hwconf->uart_type = PORT_16450;
+	if (id == 1)
+		hwconf->ports = 8;
+	else
+		hwconf->ports = 4;
+	request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
+	request_region(hwconf->vector, 1, "mxser(vector)");
+	return (hwconf->ports);
+}
+
+#define CHIP_SK 	0x01	/* Serial Data Clock  in Eprom */
+#define CHIP_DO 	0x02	/* Serial Data Output in Eprom */
+#define CHIP_CS 	0x04	/* Serial Chip Select in Eprom */
+#define CHIP_DI 	0x08	/* Serial Data Input  in Eprom */
+#define EN_CCMD 	0x000	/* Chip's command register     */
+#define EN0_RSARLO	0x008	/* Remote start address reg 0  */
+#define EN0_RSARHI	0x009	/* Remote start address reg 1  */
+#define EN0_RCNTLO	0x00A	/* Remote byte count reg WR    */
+#define EN0_RCNTHI	0x00B	/* Remote byte count reg WR    */
+#define EN0_DCFG	0x00E	/* Data configuration reg WR   */
+#define EN0_PORT	0x010	/* Rcv missed frame error counter RD */
+#define ENC_PAGE0	0x000	/* Select page 0 of chip registers   */
+#define ENC_PAGE3	0x0C0	/* Select page 3 of chip registers   */
+static int mxser_read_register(int port, unsigned short *regs)
+{
+	int i, k, value, id;
+	unsigned int j;
+
+	id = mxser_program_mode(port);
+	if (id < 0)
+		return (id);
+	for (i = 0; i < 14; i++) {
+		k = (i & 0x3F) | 0x180;
+		for (j = 0x100; j > 0; j >>= 1) {
+			outb(CHIP_CS, port);
+			if (k & j) {
+				outb(CHIP_CS | CHIP_DO, port);
+				outb(CHIP_CS | CHIP_DO | CHIP_SK, port);	/* A? bit of read */
+			} else {
+				outb(CHIP_CS, port);
+				outb(CHIP_CS | CHIP_SK, port);	/* A? bit of read */
+			}
+		}
+		(void) inb(port);
+		value = 0;
+		for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
+			outb(CHIP_CS, port);
+			outb(CHIP_CS | CHIP_SK, port);
+			if (inb(port) & CHIP_DI)
+				value |= j;
+		}
+		regs[i] = value;
+		outb(0, port);
+	}
+	mxser_normal_mode(port);
+	return (id);
+}
+
+static int mxser_program_mode(int port)
+{
+	int id, i, j, n;
+	//unsigned long flags;
+
+	spin_lock(&gm_lock);
+	outb(0, port);
+	outb(0, port);
+	outb(0, port);
+	(void) inb(port);
+	(void) inb(port);
+	outb(0, port);
+	(void) inb(port);
+	//restore_flags(flags);
+	spin_unlock(&gm_lock);
+
+	id = inb(port + 1) & 0x1F;
+	if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID))
+		return (-1);
+	for (i = 0, j = 0; i < 4; i++) {
+		n = inb(port + 2);
+		if (n == 'M') {
+			j = 1;
+		} else if ((j == 1) && (n == 1)) {
+			j = 2;
+			break;
+		} else
+			j = 0;
+	}
+	if (j != 2)
+		id = -2;
+	return (id);
+}
+
+static void mxser_normal_mode(int port)
+{
+	int i, n;
+
+	outb(0xA5, port + 1);
+	outb(0x80, port + 3);
+	outb(12, port + 0);	/* 9600 bps */
+	outb(0, port + 1);
+	outb(0x03, port + 3);	/* 8 data bits */
+	outb(0x13, port + 4);	/* loop back mode */
+	for (i = 0; i < 16; i++) {
+		n = inb(port + 5);
+		if ((n & 0x61) == 0x60)
+			break;
+		if ((n & 1) == 1)
+			(void) inb(port);
+	}
+	outb(0x00, port + 4);
+}
+
+module_init(mxser_module_init);
+module_exit(mxser_module_exit);