mxser_new.c 80 KB
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/*
 *          mxser.c  -- MOXA Smartio/Industio family multiport serial driver.
 *
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 *      Copyright (C) 1999-2006  Moxa Technologies (support@moxa.com.tw).
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 *
 *      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.
 *
 *	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/module.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/bitops.h>
#include <asm/uaccess.h>

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#include "mxser_new.h"
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#define	MXSER_VERSION	"2.0"
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#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 */
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#define MXSER_ISR_PASS_LIMIT	99999L
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#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 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,
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	MXSER_BOARD_CP118EL,
	MXSER_BOARD_CP168EL,
	MXSER_BOARD_CP104EL
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};

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",
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	"CP-118EL series",
	"CP-168EL series",
	"CP-104EL series"
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};

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 */
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	8,			/* CP118EL */
	8,			/* CP168EL */
	4			/* CP104EL */
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};

#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}
};


static struct pci_device_id mxser_pcibrds[] = {
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	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
		.driver_data = MXSER_BOARD_C168_PCI },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
		.driver_data = MXSER_BOARD_C104_PCI },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
		.driver_data = MXSER_BOARD_CP132 },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
		.driver_data = MXSER_BOARD_CP114 },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
		.driver_data = MXSER_BOARD_CT114 },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
		.driver_data = MXSER_BOARD_CP102 },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
		.driver_data = MXSER_BOARD_CP104U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
		.driver_data = MXSER_BOARD_CP168U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
		.driver_data = MXSER_BOARD_CP132U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
		.driver_data = MXSER_BOARD_CP134U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
		.driver_data = MXSER_BOARD_CP104JU },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
		.driver_data = MXSER_BOARD_RC7000 },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
		.driver_data = MXSER_BOARD_CP118U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
		.driver_data = MXSER_BOARD_CP102UL },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
		.driver_data = MXSER_BOARD_CP102U },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
		.driver_data = MXSER_BOARD_CP118EL },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
		.driver_data = MXSER_BOARD_CP168EL },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
		.driver_data = MXSER_BOARD_CP104EL },
	{ }
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};
MODULE_DEVICE_TABLE(pci, mxser_pcibrds);

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_param_array(ioaddr, int, NULL, 0);
module_param(ttymajor, int, 0);
module_param(verbose, bool, 0);
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];
};

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struct mxser_board;

struct mxser_port {
	struct mxser_board *board;
	struct tty_struct *tty;

	unsigned long ioaddr;
	unsigned long opmode_ioaddr;
	int max_baud;
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	int rx_high_water;
	int rx_trigger;		/* Rx fifo trigger level */
	int rx_low_water;
	int baud_base;		/* max. speed */
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	long realbaud;
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	int type;		/* UART type */
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	int flags;		/* defined in tty.h */
	long session;		/* Session of opening process */
	long pgrp;		/* pgrp of opening process */

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	int x_char;		/* xon/xoff character */
	int IER;		/* Interrupt Enable Register */
	int MCR;		/* Modem control register */
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	unsigned char stop_rx;
	unsigned char ldisc_stop_rx;

	int custom_divisor;
	int close_delay;
	unsigned short closing_wait;
	unsigned char err_shadow;
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	unsigned long event;
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	int count;		/* # of fd on device */
	int blocked_open;	/* # of blocked opens */
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	struct async_icount icount; /* kernel counters for 4 input interrupts */
	int timeout;

	int read_status_mask;
	int ignore_status_mask;
	int xmit_fifo_size;
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	unsigned char *xmit_buf;
	int xmit_head;
	int xmit_tail;
	int xmit_cnt;
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	struct termios normal_termios;
	struct termios callout_termios;
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	struct mxser_mon mon_data;

	spinlock_t slock;
	struct work_struct tqueue;
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	wait_queue_head_t open_wait;
	wait_queue_head_t close_wait;
	wait_queue_head_t delta_msr_wait;
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};

struct mxser_board {
	struct pci_dev *pdev; /* temporary (until pci probing) */

	int irq;
	int board_type;
	unsigned int nports;
	unsigned long vector;
	unsigned long vector_mask;

	int chip_flag;
	int uart_type;

	struct mxser_port ports[MXSER_PORTS_PER_BOARD];
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};

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 */
};

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static struct mxser_board mxser_boards[MXSER_BOARDS];
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static struct tty_driver *mxvar_sdriver;
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;

/*
 * static functions:
 */

static int mxser_init(void);

/* static void   mxser_poll(unsigned long); */
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static int mxser_get_ISA_conf(int, struct mxser_board *);
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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 *);
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static void mxser_receive_chars(struct mxser_port *, int *);
static void mxser_transmit_chars(struct mxser_port *);
static void mxser_check_modem_status(struct mxser_port *, int);
static int mxser_block_til_ready(struct tty_struct *, struct file *,
		struct mxser_port *);
static int mxser_startup(struct mxser_port *);
static void mxser_shutdown(struct mxser_port *);
static int mxser_change_speed(struct mxser_port *, struct termios *);
static int mxser_get_serial_info(struct mxser_port *,
		struct serial_struct __user *);
static int mxser_set_serial_info(struct mxser_port *,
		struct serial_struct __user *);
static int mxser_get_lsr_info(struct mxser_port *, unsigned int __user *);
static void mxser_send_break(struct mxser_port *, int);
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static int mxser_tiocmget(struct tty_struct *, struct file *);
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static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int,
		unsigned int);
static int mxser_set_baud(struct mxser_port *, long);
static void mxser_wait_until_sent(struct tty_struct *, int);
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static void mxser_startrx(struct tty_struct *);
static void mxser_stoprx(struct tty_struct *);
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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 const 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,
	.break_ctl = mxser_rs_break,
	.wait_until_sent = mxser_wait_until_sent,
	.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");
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	printk(KERN_INFO "This is mxser driver version 1.9.1 and needs TESTING."
		"If your are willing to test this driver, please report to "
		"jirislaby@gmail.com. Thanks.\n");
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	ret = mxser_init();
	if (verbose)
		printk(KERN_DEBUG "Done.\n");
	return ret;
}

static void __exit mxser_module_exit(void)
{
	int i, err;

	if (verbose)
		printk(KERN_DEBUG "Unloading module mxser ...\n");

	err = tty_unregister_driver(mxvar_sdriver);
	if (!err)
		put_tty_driver(mxvar_sdriver);
	else
		printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");

	for (i = 0; i < MXSER_BOARDS; i++) {
		struct pci_dev *pdev;

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		if (mxser_boards[i].board_type == -1)
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			continue;
		else {
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			pdev = mxser_boards[i].pdev;
			free_irq(mxser_boards[i].irq, &mxser_boards[i]);
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			if (pdev != NULL) {	/* PCI */
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				pci_release_region(pdev, 2);
				pci_release_region(pdev, 3);
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				pci_dev_put(pdev);
			} else {
533
534
				release_region(mxser_boards[i].ports[0].ioaddr, 8 * mxser_boards[i].nports);
				release_region(mxser_boards[i].vector, 1);
535
536
537
538
539
540
541
			}
		}
	}
	if (verbose)
		printk(KERN_DEBUG "Done.\n");
}

542
static void process_txrx_fifo(struct mxser_port *info)
543
544
545
546
547
548
549
550
{
	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;
551
552
553
	} else
		for (i = 0; i < UART_INFO_NUM; i++)
			if (info->board->chip_flag == Gpci_uart_info[i].type) {
554
555
556
557
558
559
560
561
				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;
			}
}

562
static int __devinit mxser_initbrd(struct mxser_board *brd)
563
{
564
565
	struct mxser_port *info;
	unsigned int i;
566
567
568
569
	int retval;

	/*if (verbose) */  {
		printk(" max. baud rate = %d bps.\n",
570
			brd->ports[0].max_baud);
571
572
	}

573
574
575
	for (i = 0; i < brd->nports; i++) {
		info = &brd->ports[i];
		info->board = brd;
576
577
578
579
		info->stop_rx = 0;
		info->ldisc_stop_rx = 0;

		/* Enhance mode enabled here */
580
581
		if (brd->chip_flag != MOXA_OTHER_UART)
			ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
582
583

		info->flags = ASYNC_SHARE_IRQ;
584
		info->type = brd->uart_type;
585
586
587

		process_txrx_fifo(info);

588
		info->custom_divisor = info->baud_base * 16;
589
590
591
592
593
594
595
596
597
598
		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);
599
600
601
602

		/* before set INT ISR, disable all int */
		outb(inb(info->ioaddr + UART_IER) & 0xf0,
			info->ioaddr + UART_IER);
603
604
605
606
607
	}
	/*
	 * Allocate the IRQ if necessary
	 */

608
609
610
	retval = request_irq(brd->irq, mxser_interrupt,
			(brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
			IRQF_DISABLED, "mxser", brd);
611
	if (retval) {
612
613
614
		printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
			"conflict with another device.\n",
			mxser_brdname[brd->board_type - 1], brd->irq);
615
616
617
618
619
		return retval;
	}
	return 0;
}

620
static int __init mxser_get_PCI_conf(int board_type, struct mxser_board *brd,
621
		struct pci_dev *pdev)
622
{
623
	unsigned int i, j;
624
	unsigned long ioaddress;
625
	int retval;
626
627

	/* io address */
628
629
	brd->board_type = board_type;
	brd->nports = mxser_numports[board_type - 1];
630
	ioaddress = pci_resource_start(pdev, 2);
631
632
633
	retval = pci_request_region(pdev, 2, "mxser(IO)");
	if (retval)
		goto err;
634

635
636
	for (i = 0; i < brd->nports; i++)
		brd->ports[i].ioaddr = ioaddress + 8 * i;
637
638
639

	/* vector */
	ioaddress = pci_resource_start(pdev, 3);
640
641
642
	retval = pci_request_region(pdev, 3, "mxser(vector)");
	if (retval)
		goto err_relio;
643
	brd->vector = ioaddress;
644
645

	/* irq */
646
	brd->irq = pdev->irq;
647

648
649
650
	brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
	brd->uart_type = PORT_16550A;
	brd->vector_mask = 0;
651

652
	for (i = 0; i < brd->nports; i++) {
653
		for (j = 0; j < UART_INFO_NUM; j++) {
654
655
656
			if (Gpci_uart_info[j].type == brd->chip_flag) {
				brd->ports[i].max_baud =
					Gpci_uart_info[j].max_baud;
657
658
659

				/* exception....CP-102 */
				if (board_type == MXSER_BOARD_CP102)
660
					brd->ports[i].max_baud = 921600;
661
662
663
664
665
				break;
			}
		}
	}

666
667
	if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
		for (i = 0; i < brd->nports; i++) {
668
			if (i < 4)
669
				brd->ports[i].opmode_ioaddr = ioaddress + 4;
670
			else
671
				brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
672
673
674
675
676
		}
		outb(0, ioaddress + 4);	/* default set to RS232 mode */
		outb(0, ioaddress + 0x0c);	/* default set to RS232 mode */
	}

677
678
679
	for (i = 0; i < brd->nports; i++) {
		brd->vector_mask |= (1 << i);
		brd->ports[i].baud_base = 921600;
680
681
	}
	return 0;
682
683
684
685
err_relio:
	pci_release_region(pdev, 2);
err:
	return retval;
686
687
}

688
static int __init mxser_init(void)
689
690
{
	struct pci_dev *pdev = NULL;
691
692
693
	struct mxser_board *brd;
	unsigned int i, m;
	int retval, b, n;
694
695
696
697
698
699

	mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
	if (!mxvar_sdriver)
		return -ENOMEM;
	spin_lock_init(&gm_lock);

700
701
	for (i = 0; i < MXSER_BOARDS; i++)
		mxser_boards[i].board_type = -1;
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731

	printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
		MXSER_VERSION);

	/* Initialize the tty_driver structure */
	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_diagflag = 0;

	m = 0;
	/* Start finding ISA boards here */
	for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
		int cap;

		if (!(cap = mxserBoardCAP[b]))
			continue;

732
733
		brd = &mxser_boards[m];
		retval = mxser_get_ISA_conf(cap, brd);
734
735
736

		if (retval != 0)
			printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
737
				mxser_brdname[brd->board_type - 1], ioaddr[b]);
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755

		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;
		}

756
		brd->pdev = NULL;
757
758

		/* mxser_initbrd will hook ISR. */
759
		if (mxser_initbrd(brd) < 0)
760
761
762
763
764
765
766
			continue;

		m++;
	}

	/* Start finding ISA boards from module arg */
	for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
767
		unsigned long cap;
768
769
770
771

		if (!(cap = ioaddr[b]))
			continue;

772
773
		brd = &mxser_boards[m];
		retval = mxser_get_ISA_conf(cap, &mxser_boards[m]);
774
775
776

		if (retval != 0)
			printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
777
				mxser_brdname[brd->board_type - 1], ioaddr[b]);
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795

		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;
		}

796
		brd->pdev = NULL;
797
		/* mxser_initbrd will hook ISR. */
798
		if (mxser_initbrd(brd) < 0)
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
			continue;

		m++;
	}

	/* start finding PCI board here */
	n = ARRAY_SIZE(mxser_pcibrds) - 1;
	b = 0;
	while (b < n) {
		pdev = pci_get_device(mxser_pcibrds[b].vendor,
				mxser_pcibrds[b].device, pdev);
		if (pdev == NULL) {
			b++;
			continue;
		}
		printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
			mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
816
			pdev->bus->number, PCI_SLOT(pdev->devfn));
817
818
819
820
821
822
823
824
825
826
827
		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;
			}
828
829
830
			brd = &mxser_boards[m];
			brd->pdev = pdev;
			retval = mxser_get_PCI_conf(
831
					(int)mxser_pcibrds[b].driver_data,
832
					brd, pdev);
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
			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_initbrd will hook ISR. */
853
			if (mxser_initbrd(brd) < 0)
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
				continue;
			m++;
			/* Keep an extra reference if we succeeded. It will
			   be returned at unload time */
			pci_dev_get(pdev);
		}
	}

	retval = tty_register_driver(mxvar_sdriver);
	if (retval) {
		printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
				" driver !\n");
		put_tty_driver(mxvar_sdriver);

		for (i = 0; i < MXSER_BOARDS; i++) {
869
			if (mxser_boards[i].board_type == -1)
870
871
				continue;
			else {
872
				free_irq(mxser_boards[i].irq, &mxser_boards[i]);
873
874
875
876
877
878
879
880
881
882
883
				/* todo: release io, vector */
			}
		}
		return retval;
	}

	return 0;
}

static void mxser_do_softint(void *private_)
{
884
	struct mxser_port *info = private_;
885
886
887
888
	struct tty_struct *tty;

	tty = info->tty;

889
890
891
892
	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);
893
894
}

895
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
{
	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)
{
918
	struct mxser_port *info;
919
920
921
922
923
924
925
926
927
928
	int retval, line;

	/* initialize driver_data in case something fails */
	tty->driver_data = NULL;

	line = tty->index;
	if (line == MXSER_PORTS)
		return 0;
	if (line < 0 || line > MXSER_PORTS)
		return -ENODEV;
929
930
	info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
	if (!info->ioaddr)
931
932
933
934
935
936
937
		return -ENODEV;

	tty->driver_data = info;
	info->tty = tty;
	/*
	 * Start up serial port
	 */
938
	info->count++;
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
	retval = mxser_startup(info);
	if (retval)
		return retval;

	retval = mxser_block_til_ready(tty, filp, info);
	if (retval)
		return retval;

	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);
	}

955
	info->session = process_session(current);
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
	info->pgrp = process_group(current);

	/*
	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)
{
976
	struct mxser_port *info = tty->driver_data;
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006

	unsigned long timeout;
	unsigned long flags;
	struct tty_ldisc *ld;

	if (tty->index == MXSER_PORTS)
		return;
	if (!info)
		return;

	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 "
1007
			"ttys%d: %d\n", tty->index, info->count);
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
		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;
1036
	if (info->board->chip_flag)
1037
1038
1039
1040
1041
		info->IER &= ~MOXA_MUST_RECV_ISR;
/* by William
	info->read_status_mask &= ~UART_LSR_DR;
*/
	if (info->flags & ASYNC_INITIALIZED) {
1042
		outb(info->IER, info->ioaddr + UART_IER);
1043
1044
1045
1046
1047
1048
		/*
		 * 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;
1049
		while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
			schedule_timeout_interruptible(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)
			schedule_timeout_interruptible(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;
1084
	struct mxser_port *info = tty->driver_data;
1085
1086
1087
1088
1089
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1091
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1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
	unsigned long flags;

	if (!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;
	}

1108
1109
	if (info->xmit_cnt && !tty->stopped
			/*&& !(info->IER & UART_IER_THRI)*/) {
1110
1111
		if (!tty->hw_stopped ||
				(info->type == PORT_16550A) ||
1112
				(info->board->chip_flag)) {
1113
			spin_lock_irqsave(&info->slock, flags);
1114
1115
			outb(info->IER & ~UART_IER_THRI, info->ioaddr +
					UART_IER);
1116
			info->IER |= UART_IER_THRI;
1117
			outb(info->IER, info->ioaddr + UART_IER);
1118
1119
1120
1121
1122
1123
1124
1125
			spin_unlock_irqrestore(&info->slock, flags);
		}
	}
	return total;
}

static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
{
1126
	struct mxser_port *info = tty->driver_data;
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
	unsigned long flags;

	if (!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);
1140
	if (!tty->stopped /*&& !(info->IER & UART_IER_THRI)*/) {
1141
1142
		if (!tty->hw_stopped ||
				(info->type == PORT_16550A) ||
1143
				info->board->chip_flag) {
1144
			spin_lock_irqsave(&info->slock, flags);
1145
			outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1146
			info->IER |= UART_IER_THRI;
1147
			outb(info->IER, info->ioaddr + UART_IER);
1148
1149
1150
1151
1152
1153
1154
1155
			spin_unlock_irqrestore(&info->slock, flags);
		}
	}
}


static void mxser_flush_chars(struct tty_struct *tty)
{
1156
	struct mxser_port *info = tty->driver_data;
1157
1158
1159
1160
1161
1162
1163
	unsigned long flags;

	if (info->xmit_cnt <= 0 ||
			tty->stopped ||
			!info->xmit_buf ||
			(tty->hw_stopped &&
			 (info->type != PORT_16550A) &&
1164
			 (!info->board->chip_flag)
1165
1166
1167
1168
1169
			))
		return;

	spin_lock_irqsave(&info->slock, flags);

1170
	outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1171
	info->IER |= UART_IER_THRI;
1172
	outb(info->IER, info->ioaddr + UART_IER);
1173
1174
1175
1176
1177
1178

	spin_unlock_irqrestore(&info->slock, flags);
}

static int mxser_write_room(struct tty_struct *tty)
{
1179
	struct mxser_port *info = tty->driver_data;
1180
1181
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1183
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1185
1186
1187
1188
1189
	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)
{
1190
	struct mxser_port *info = tty->driver_data;
1191
1192
	int len = info->xmit_cnt;

1193
	if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE))
1194
1195
1196
		len++;

	return len;
1197
1198
1199
1200
}

static void mxser_flush_buffer(struct tty_struct *tty)
{
1201
	struct mxser_port *info = tty->driver_data;
1202
1203
1204
1205
1206
1207
1208
1209
	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 */
1210
	fcr = inb(info->ioaddr + UART_FCR);
1211
	outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1212
1213
		info->ioaddr + UART_FCR);
	outb(fcr, info->ioaddr + UART_FCR);
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224

	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)
{
1225
	struct mxser_port *info = tty->driver_data;
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
	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) {
1238
1239
		int p;
		unsigned long opmode;
1240
1241
1242
1243
		static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
		int shiftbit;
		unsigned char val, mask;

1244
		p = tty->index % 4;
1245
1246
1247
1248
1249
1250
1251
1252
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1254
1255
1256
1257
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1371
1372
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1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
		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);

1404
			lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417

			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; */

1418
			status = mxser_get_msr(info->ioaddr, 1, tty->index);
1419
1420
			mxser_check_modem_status(info, status);

1421
			mcr = inb(info->ioaddr + UART_MCR);
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
			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;
1457
			mxser_set_baud_method[tty->index] = method;
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
			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)
{
1475
1476
1477
	struct mxser_port *port;
	int result, status;
	unsigned int i, j;
1478
1479
1480

	switch (cmd) {
	case MOXA_GET_CONF:
1481
/*		if (copy_to_user(argp, mxsercfg,
1482
1483
				sizeof(struct mxser_hwconf) * 4))
			return -EFAULT;
1484
1485
		return 0;*/
		return -ENXIO;
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
	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;
1498
1499
1500
1501
1502
1503

		for (i = 0; i < MXSER_BOARDS; i++)
			for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
				if (mxser_boards[i].ports[j].ioaddr)
					result |= (1 << i);

1504
1505
1506
1507
1508
1509
		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:
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
		for (i = 0; i < MXSER_BOARDS; i++)
			for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
				port = &mxser_boards[i].ports[j];

				GMStatus[i].ri = 0;
				if (!port->ioaddr) {
					GMStatus[i].dcd = 0;
					GMStatus[i].dsr = 0;
					GMStatus[i].cts = 0;
					continue;
				}
1521

1522
1523
1524
1525
1526
1527
				if (!port->tty || !port->tty->termios)
					GMStatus[i].cflag =
						port->normal_termios.c_cflag;
				else
					GMStatus[i].cflag =
						port->tty->termios->c_cflag;
1528

1529
1530
1531
1532
1533
				status = inb(port->ioaddr + UART_MSR);
				if (status & 0x80 /*UART_MSR_DCD */ )
					GMStatus[i].dcd = 1;
				else
					GMStatus[i].dcd = 0;
1534

1535
1536
1537
1538
				if (status & 0x20 /*UART_MSR_DSR */ )
					GMStatus[i].dsr = 1;
				else
					GMStatus[i].dsr = 0;
1539
1540


1541
1542
1543
1544
1545
				if (status & 0x10 /*UART_MSR_CTS */ )
					GMStatus[i].cts = 1;
				else
					GMStatus[i].cts = 0;
			}
1546
1547
1548
1549
1550
		if (copy_to_user(argp, GMStatus,
				sizeof(struct mxser_mstatus) * MXSER_PORTS))
			return -EFAULT;
		return 0;
	case MOXA_ASPP_MON_EXT: {
1551
1552
1553
		int status, p, shiftbit;
		unsigned long opmode;
		unsigned cflag, iflag;
1554

1555
1556
1557
1558
		for (i = 0; i < MXSER_BOARDS; i++)
			for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
				port = &mxser_boards[i].ports[j];
				if (!port->ioaddr)
1559
1560
					continue;

1561
1562
1563
				status = mxser_get_msr(port->ioaddr, 0, i);
/*				mxser_check_modem_status(port, status); */

1564
				if (status & UART_MSR_TERI)
1565
					port->icount.rng++;
1566
				if (status & UART_MSR_DDSR)
1567
					port->icount.dsr++;
1568
				if (status & UART_MSR_DDCD)
1569
					port->icount.dcd++;
1570
				if (status & UART_MSR_DCTS)
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
					port->icount.cts++;

				port->mon_data.modem_status = status;
				mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
				mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
				mon_data_ext.up_rxcnt[i] =
					port->mon_data.up_rxcnt;
				mon_data_ext.up_txcnt[i] =
					port->mon_data.up_txcnt;
				mon_data_ext.modem_status[i] =
					port->mon_data.modem_status;
				mon_data_ext.baudrate[i] = port->realbaud;

				if (!port->tty || !port->tty->termios) {
					cflag = port->normal_termios.c_cflag;
					iflag = port->normal_termios.c_iflag;
1587
				} else {
1588
1589
					cflag = port->tty->termios->c_cflag;
					iflag = port->tty->termios->c_iflag;
1590
1591
1592
1593
1594
1595
				}

				mon_data_ext.databits[i] = cflag & CSIZE;

				mon_data_ext.stopbits[i] = cflag & CSTOPB;

1596
1597
				mon_data_ext.parity[i] =
					cflag & (PARENB | PARODD | CMSPAR);
1598
1599
1600
1601
1602
1603
1604
1605
1606

				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;

1607
				if (port->type == PORT_16550A)
1608
1609
1610
1611
1612
1613
					mon_data_ext.fifo[i] = 1;
				else
					mon_data_ext.fifo[i] = 0;

				p = i % 4;
				shiftbit = p * 2;
1614
				opmode = inb(port->opmode_ioaddr) >> shiftbit;
1615
1616
1617
1618
1619
				opmode &= OP_MODE_MASK;

				mon_data_ext.iftype[i] = opmode;

			}
1620
1621
			if (copy_to_user(argp, &mon_data_ext,
						sizeof(mon_data_ext)))
1622
1623
1624
1625
				return -EFAULT;

			return 0;

1626
	} default:
1627
1628
1629
1630
1631
1632
1633
		return -ENOIOCTLCMD;
	}
	return 0;
}

static void mxser_stoprx(struct tty_struct *tty)
{
1634
	struct mxser_port *info = tty->driver_data;
1635
1636
1637
1638

	info->ldisc_stop_rx = 1;
	if (I_IXOFF(tty)) {
		/* following add by Victor Yu. 09-02-2002 */
1639
		if (info->board->chip_flag) {
1640
			info->IER &= ~MOXA_MUST_RECV_ISR;
1641
			outb(info->IER, info->ioaddr + UART_IER);
1642
		} else if (!(info->flags & ASYNC_CLOSING)) {
1643
			info->x_char = STOP_CHAR(tty);
1644
			outb(0, info->ioaddr + UART_IER);
1645
			info->IER |= UART_IER_THRI;
1646
			outb(info->IER, info->ioaddr + UART_IER);
1647
		}
1648
1649
1650
1651
	}

	if (info->tty->termios->c_cflag & CRTSCTS) {
		info->MCR &= ~UART_MCR_RTS;
1652
		outb(info->MCR, info->ioaddr + UART_MCR);
1653
1654
1655
1656
1657
	}
}

static void mxser_startrx(struct tty_struct *tty)
{