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	FreeIPA project	Alexander Bokovoy

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	Commit message (Collapse)	Author	Age	Files	Lines
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*	webui: entity menu items navigate to main entity facet	Petr Vobornik	2015-05-20	1	-3/+0
| | | | | | |	I.e. remove memory from bare entity navigation Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	webui: entity facets in facet registry	Petr Vobornik	2015-05-20	5	-15/+56
| | | | | | | | | | | | | | | | |	All entity facets are automatically registered as a new type in reg.facet. The type name is: <entity_name>_<facet_name> The name of facets is kept same, mainly to support the same url routes. This change allows to get facet instance by calling, e.g.: reg.facet.get('user_details') It allows to make declarative links to facet which are not yet instantiated. Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	webui: register construction spec based on existing spec	Petr Vobornik	2015-05-20	2	-23/+50
| | | | | | | |	Useful for declarative inheritance. E.g. base new facet on details facet with all registered preops and default spec object. Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	webui: declare search command options in search facet	Petr Vobornik	2015-05-20	1	-0/+23
| | | | | | | | | | |	A search facet could be defined with an option which is always applied during entity-find command on facet refresh. e.g. ipa user-find --preserved Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	webui: rename IPA.user_* to IPA.user.*	Petr Vobornik	2015-05-20	1	-4/+4
| | | | | | | | | | |	Or in other words, move all objects which belong to user module to the module. Therefore they no longer pollutes the main 'IPA' module. Therefore: require('freeipa/ipa').user == require('freeipa/user') Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	webui: update patternfly to v1.1.4	Petr Vobornik	2015-05-20	5	-8/+18
| | | | | | | |	Not all functionality is available. Mostly because IPA doesn't require them yet. Missing: bootstrap combobox, datatables js, PF font with icons, spinner for old IEs Reviewed-By: David Kupka <dkupka@redhat.com> Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>
*	Pylint: fix false positive warning for domain	Martin Basti	2015-05-19	1	-1/+1
| | | |	Reviewed-By: Petr Vobornik <pvoborni@redhat.com>
*	DNS install: extract DNS installer into one module	Martin Basti	2015-05-19	7	-264/+269
| | | | | | | | | | | |	This is required modification to be able move to new installers. DNS subsystem will be installed by functions in this module in each of ipa-server-install, ipa-dns-install, ipa-replica-install install scripts. https://fedorahosted.org/freeipa/ticket/4468 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
*	explicitly destroy httpd service ccache file during httpinstance removal	Martin Babinsky	2015-05-19	2	-0/+5
| | | | | | | | | | | | | |	during IPA server uninstall, the httpd service ccache is not removed from runtime directory. This file then causes server-side client install to fail when performing subsequent installation without rebooting/recreating runtime directories. This patch ensures that the old httpd ccache is explicitly destroyed during uninstallation. https://fedorahosted.org/freeipa/ticket/4973 Reviewed-By: David Kupka <dkupka@redhat.com>
*	move IPA-related http runtime directories to common subdirectory	Martin Babinsky	2015-05-19	4	-6/+12
| | | | | | | | | | | | | |	When both 'mod_auth_kerb' and 'mod_auth_gssapi' are installed at the same time, they use common directory for storing Apache ccache file. Uninstallation of 'mod_auth_kerb' removes this directory leading to invalid CCache path for httpd and authentication failure. Using an IPA-specific directory for credential storage during apache runtime avoids this issue. https://fedorahosted.org/freeipa/ticket/4973 Reviewed-By: David Kupka <dkupka@redhat.com>
*	Do not store state if CA is enabled	David Kupka	2015-05-19	2	-15/+2
| | | | | | |	IPA creates own instance of CA, so there is no need to check if previous instance was enabled, because there could not be any. Reviewed-By: Martin Basti <mbasti@redhat.com>
*	DNSSEC: update OpenDNSSEC KASP configuration	Martin Basti	2015-05-19	1	-76/+3
| | | | | | | | | | | | |	* remove unneeded parts * increase KSK key length to 3072 * increase KSK key lifetime to 2 years (see NIST SP 800-81-2 section 11.2) Update is not required, as template contains just recommended values which should by reviewed by administrators. https://fedorahosted.org/freeipa/ticket/4657 Reviewed-By: Petr Spacek <pspacek@redhat.com>
*	DNSSEC: FIX Do not re-create kasp.db if already exists	Martin Basti	2015-05-19	1	-0/+1
| | | | | | | |	Kasp should not be replaced by DNS reinstallation with new file. https://fedorahosted.org/freeipa/ticket/4657 Reviewed-By: Petr Spacek <pspacek@redhat.com>
*	Server Upgrade: Fix uniqueness plugins	Martin Basti	2015-05-19	3	-23/+15
| | | | | | | | | | | | | | | | | | |	Due previous changes (in master branch only) the uniqueness plugins became misconfigured. After this patch: * whole $SUFFIX will be checked by unique plugins * just staged users are exluded from check This reverts some changes in commit 52b7101c1148618d5c8e2ec25576cc7ad3e9b7bb Since 389-ds-base 1.3.4.a1 new attribute 'uniqueness-exclude-subtrees' can be used. https://fedorahosted.org/freeipa/ticket/4921 Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	Server Upgrade: ipa-ldap-updater will not do overall upgrade	Martin Basti	2015-05-19	2	-20/+9
| | | | | | | | | | | |	ipa-ldap-updater is now just util which applies changes specified in update files or schema files. ipa-ldap-updater will not do overall server upgrade anymore, use ipa-server-upgrade instead. https://fedorahosted.org/freeipa/ticket/4904 Reviewed-By: David Kupka <dkupka@redhat.com>
*	Server Upgrade: handle errors better	Martin Basti	2015-05-19	4	-24/+29
| | | | | | | | |	* Prevent to continue with upgrade if a fatal error happened * Use exceptions to handle failures https://fedorahosted.org/freeipa/ticket/4904 Reviewed-By: David Kupka <dkupka@redhat.com>
*	Server Upgrade: do not allow to run upgradeinstace alone	Martin Basti	2015-05-19	1	-18/+0
| | | | | |	https://fedorahosted.org/freeipa/ticket/4904 Reviewed-By: David Kupka <dkupka@redhat.com>
*	Server Upgrade: raise RuntimeError instead exit()	Martin Basti	2015-05-19	1	-1/+1
| | | | | | | | |	Ldapupdater should not call sys.exit() in the middle of execution and should fail gracefully https://fedorahosted.org/freeipa/ticket/4904 Reviewed-By: David Kupka <dkupka@redhat.com>
*	Server Upgrade: Do not start DS if it was stopped before upgrade	Martin Basti	2015-05-19	1	-3/+5
| | | | | |	https://fedorahosted.org/freeipa/ticket/4904 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: Add 'Stage User Provisioning' permission/priviledge	Thierry Bordaz	2015-05-18	3	-4/+25
| | | | | | |	Add the ability for 'Stage user provisioning' priviledge to add stage users. Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: Stage user Administrators permission/priviledge	Thierry Bordaz	2015-05-18	11	-7/+206
| | | | | | | |	Creation of stage user administrator https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: DNA DS plugin should exclude provisioning DIT	Thierry Bordaz	2015-05-18	1	-0/+1
| | | | | | | |	Set the DNAexcludescope on provisioning part of the DIT https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: support of user-undel	Thierry Bordaz	2015-05-18	2	-1/+53
| | | | | | | | |	add user plugin commands : user-undel user-undel: moves a user from delete container to the active container https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: user-find support finding delete users	Thierry Bordaz	2015-05-18	2	-4/+22
| | | | | | | | |	change user plugin commands : user-find user-find support of --preserved option to show preserved (aka deleted) users https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: user-del supports --permanently, --preserve options and ↵	Thierry Bordaz	2015-05-18	2	-13/+126
| | | | | | | | | | | | |	ability to delete deleted user change user plugin commands : user-del - --permanently: deletes permanently an Active user (DEL) - --preserve: move an Active user to Delete user (MODRDN) - allows to delete Active user and Delete user https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: new stageuser commands activate (provisioning)	Thierry Bordaz	2015-05-18	1	-7/+65
| | | | | | | | |	Add plugin commands to stageuser plugin: stageuser_activate: activate entries created by provisioning https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: new stageuser commands activate	Thierry Bordaz	2015-05-18	5	-4/+305
| | | | | | | | |	Add plugin commands to stageuser plugin: stageuser_activate: activate entries created by IPA CLIs https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	User life cycle: new stageuser commands del/mod/find/show	Thierry Bordaz	2015-05-18	5	-79/+310
| | | | | | | | | | | |	Add plugin commands to stageuser plugin: stageuser_del stageuser_mod stageuser_find stageuser_show https://fedorahosted.org/freeipa/ticket/3813 Reviewed-By: David Kupka <dkupka@redhat.com>
*	baseldap: Fix possible crash in LDAPObject.handle_duplicate_entry	Jan Cholasta	2015-05-15	1	-1/+1
|
*	Dont use the proxy to check CA status	Martin Basti	2015-05-15	1	-12/+0
| | | | | | | | | | |	Checking status of the CA via proxy cause issues when httpd instance is down. To check status of CA we do not need proxy. https://fedorahosted.org/freeipa/ticket/4994 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
*	provide dedicated ccache file for httpd	Martin Babinsky	2015-05-12	2	-0/+9
| | | | | | | | | | | | |	httpd service stores Kerberos credentials in kernel keyring which gets destroyed and recreated during service install/upgrade, causing problems when the process is run under SELinux context other than 'unconfined_t'. This patch enables HTTPInstance to set up a dedicated CCache file for Apache to store credentials. https://fedorahosted.org/freeipa/ticket/4973 Reviewed-By: Jan Cholasta <jcholast@redhat.com> Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
*	Server Upgrade: fix memberUid index	Martin Basti	2015-05-12	1	-2/+2
| | | | | |	https://fedorahosted.org/freeipa/ticket/5007 Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	webui-ci: fix type error in host_tasks inicializations	Petr Vobornik	2015-05-12	2	-2/+4
| | | | | |	host_tasks initializations were not modified along with pytest migration Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	cli: differentiate Flag a Bool when autofill is set	Petr Vobornik	2015-05-12	1	-2/+2
| | | | | | | | | | |	With previous behavior there was no difference between Flag and Bool if - autofill == True - default = some value It prevented to have a boolean which is set by default to true, but could be set to False if users wants to without prompting in interactive shell. Reviewed-By: Martin Basti <mbasti@redhat.com>
*	migrate-ds: log migrated group members only on debug level	Petr Vobornik	2015-05-12	1	-2/+2
| | | | | |	It pollutes error_log. Reviewed-By: Martin Basti <mbasti@redhat.com>
*	migrate-ds: optimize gid checks by utilizing dictionary nature of set	Petr Vobornik	2015-05-12	1	-4/+4
| | | |	Reviewed-By: Martin Basti <mbasti@redhat.com>
*	migrate-ds: remove unused def_group_gid context property	Petr Vobornik	2015-05-12	1	-3/+1
| | | | | |	it's no longer used anywhere Reviewed-By: Martin Basti <mbasti@redhat.com>
*	migrate-ds: skip default group option	Petr Vobornik	2015-05-12	3	-7/+18
| | | | | | | | | | | | |	New option --use-default-group=False could be used to disable adding of migrated users into default group. By default, the default group is no longer POSIX therefore it doesn't fulfill the original idea of providing GID and therefore it could be skipped during migration. https://fedorahosted.org/freeipa/ticket/4950 Reviewed-By: Martin Basti <mbasti@redhat.com>
*	migrate-ds: optimize adding users to default group	Petr Vobornik	2015-05-12	1	-17/+12
| | | | | | | | | | | | |	Migrate-ds searches for user without a group and adds them to default group. There is no point in checking if the user's selected by previous queary are not member of default group because they are not member of any group. The operation is also speeded up by not fetching the default group. Users are added right away. https://fedorahosted.org/freeipa/ticket/4950 Reviewed-By: Martin Basti <mbasti@redhat.com>
*	jQuery.ordered_map: remove map attribute	Petr Vobornik	2015-05-12	2	-13/+2
| | | | | | | |	map attribute is redundant and not used. Use `get` method instead. Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	jQuery.ordered_map: faster creation	Petr Vobornik	2015-05-12	1	-1/+7
| | | | | | | |	Creation of map with e.g. 30K values was very slow. Map checked if a value is in in the map but it used Array's indexOf method therefore the complexity was quadratic instead of linear. Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	Server Upgrade: Allow base64 encoded values	Martin Basti	2015-05-11	8	-51/+145
| | | | | | | | | | | | | |	This patch allows to use base64 encoded values in update files. Double colon ('::') must be used as separator between attribute name and base64 encoded value. add:attr::<base64-value> replace:attr::<old-base64-value>::<new-base64-value> https://fedorahosted.org/freeipa/ticket/4984 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
*	Server Upgrade: remove CSV from upgrade files	Martin Basti	2015-05-11	24	-322/+319
| | | | | | | | | | | | | | | | |	CSV values are not supported in upgrade files anymore Instead of add:attribute: 'first, part', second please use add:attribute: firts, part add:attribute: second Required for ticket: https://fedorahosted.org/freeipa/ticket/4984 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
*	use Connectible.disconnect() instead of .destroy_connection()	Petr Vobornik	2015-05-07	2	-3/+3
| | | | | | | | |	Destroy connection is an internal function of Connectible and therefore it should not be used directly. https://fedorahosted.org/freeipa/ticket/4991 Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
*	allow to call ldap2.destroy_connection multiple times	Petr Vobornik	2015-05-07	2	-3/+4
| | | | | |	A regression fix. Reviewed-By: Nathaniel McCallum <npmccallum@redhat.com>
*	Update BUILD.txt	Petr Vobornik	2015-05-07	1	-11/+18
| | | | | | | |	Add note about `dnf builddep` command and link to http://www.freeipa.org/page/Build page which contains information about copr repos Reviewed-By: Martin Basti <mbasti@redhat.com>
*	Test Objectclass of postdetach group	Lenka Ryznarova	2015-05-07	1	-0/+69
| | | | | | | | |	Add regression test to check whether a post detach group has a full set of objectclass. Add regression test to check whether group-add-member is successfull for a post detach group. https://fedorahosted.org/freeipa/ticket/4909 Reviewed-By: Petr Vobornik <pvoborni@redhat.com>
*	update 'api.env.ca_host' if a different hostname is used during server install	Martin Babinsky	2015-05-07	1	-3/+6
| | | | | |	https://fedorahosted.org/freeipa/ticket/4936 Reviewed-By: Petr Vobornik <pvoborni@redhat.com>
*	ipa-server-install: deprecate manual setting of master KDC password	Martin Babinsky	2015-05-07	2	-4/+12
| | | | | | | | | | |	Option '-P' was used in older version of FreeIPA to set up KDC master password during server install. This is no longer neccessary or desirable since the password of sufficient strength can be generated automatically during installation. https://fedorahosted.org/freeipa/ticket/4516 Reviewed-By: Petr Vobornik <pvoborni@redhat.com>
*	Changed in-tree development setup instructions	Thorsten Scherf	2015-05-07	1	-2/+4
| | | | | | | |	Instructions on how to setup an in-tree development server were not were clear in the existing BUILD.txt. Setup procedure has been extended and corrected. Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

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generated by cgit (git 2.34.1) at 2025-09-03 21:31:14 +0000

/*****************************************************************************/
/*
 *           moxa.c  -- MOXA Intellio family multiport serial driver.
 *
 *      Copyright (C) 1999-2000  Moxa Technologies (support@moxa.com).
 *      Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
 *
 *      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.
 */

/*
 *    MOXA Intellio Series Driver
 *      for             : LINUX
 *      date            : 1999/1/7
 *      version         : 5.1
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/firmware.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/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>

#include "moxa.h"

#define MOXA_VERSION		"6.0k"

#define MOXA_FW_HDRLEN		32

#define MOXAMAJOR		172

#define MAX_BOARDS		4	/* Don't change this value */
#define MAX_PORTS_PER_BOARD	32	/* Don't change this value */
#define MAX_PORTS		(MAX_BOARDS * MAX_PORTS_PER_BOARD)

#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
		(brd)->boardType == MOXA_BOARD_C320_PCI)

/*
 *    Define the Moxa PCI vendor and device IDs.
 */
#define MOXA_BUS_TYPE_ISA	0
#define MOXA_BUS_TYPE_PCI	1

enum {
	MOXA_BOARD_C218_PCI = 1,
	MOXA_BOARD_C218_ISA,
	MOXA_BOARD_C320_PCI,
	MOXA_BOARD_C320_ISA,
	MOXA_BOARD_CP204J,
};

static char *moxa_brdname[] =
{
	"C218 Turbo PCI series",
	"C218 Turbo ISA series",
	"C320 Turbo PCI series",
	"C320 Turbo ISA series",
	"CP-204J series",
};

#ifdef CONFIG_PCI
static struct pci_device_id moxa_pcibrds[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
		.driver_data = MOXA_BOARD_C218_PCI },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
		.driver_data = MOXA_BOARD_C320_PCI },
	{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
		.driver_data = MOXA_BOARD_CP204J },
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
#endif /* CONFIG_PCI */

struct moxa_port;

static struct moxa_board_conf {
	int boardType;
	int numPorts;
	int busType;

	unsigned int ready;

	struct moxa_port *ports;

	void __iomem *basemem;
	void __iomem *intNdx;
	void __iomem *intPend;
	void __iomem *intTable;
} moxa_boards[MAX_BOARDS];

struct mxser_mstatus {
	tcflag_t cflag;
	int cts;
	int dsr;
	int ri;
	int dcd;
};

struct moxaq_str {
	int inq;
	int outq;
};

struct moxa_port {
	struct tty_port port;
	struct moxa_board_conf *board;
	void __iomem *tableAddr;

	int type;
	int cflag;
	unsigned long statusflags;

	u8 DCDState;
	u8 lineCtrl;
	u8 lowChkFlag;
};

struct mon_str {
	int tick;
	int rxcnt[MAX_PORTS];
	int txcnt[MAX_PORTS];
};

/* statusflags */
#define TXSTOPPED	0x1
#define LOWWAIT 	0x2
#define EMPTYWAIT	0x4
#define THROTTLE	0x8

#define SERIAL_DO_RESTART

#define WAKEUP_CHARS		256

static int ttymajor = MOXAMAJOR;
static struct mon_str moxaLog;
static unsigned int moxaFuncTout = HZ / 2;
static unsigned int moxaLowWaterChk;
static DEFINE_MUTEX(moxa_openlock);
/* Variables for insmod */
#ifdef MODULE
static unsigned long baseaddr[MAX_BOARDS];
static unsigned int type[MAX_BOARDS];
static unsigned int numports[MAX_BOARDS];
#endif

MODULE_AUTHOR("William Chen");
MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
MODULE_LICENSE("GPL");
#ifdef MODULE
module_param_array(type, uint, NULL, 0);
MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
module_param_array(baseaddr, ulong, NULL, 0);
MODULE_PARM_DESC(baseaddr, "base address");
module_param_array(numports, uint, NULL, 0);
MODULE_PARM_DESC(numports, "numports (ignored for C218)");
#endif
module_param(ttymajor, int, 0);

/*
 * static functions:
 */
static int moxa_open(struct tty_struct *, struct file *);
static void moxa_close(struct tty_struct *, struct file *);
static int moxa_write(struct tty_struct *, const unsigned char *, int);
static int moxa_write_room(struct tty_struct *);
static void moxa_flush_buffer(struct tty_struct *);
static int moxa_chars_in_buffer(struct tty_struct *);
static void moxa_throttle(struct tty_struct *);
static void moxa_unthrottle(struct tty_struct *);
static void moxa_set_termios(struct tty_struct *, struct ktermios *);
static void moxa_stop(struct tty_struct *);
static void moxa_start(struct tty_struct *);
static void moxa_hangup(struct tty_struct *);
static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear);
static void moxa_poll(unsigned long);
static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
static void moxa_setup_empty_event(struct tty_struct *);
static void moxa_shut_down(struct tty_struct *);
static int moxa_carrier_raised(struct tty_port *);
/*
 * moxa board interface functions:
 */
static void MoxaPortEnable(struct moxa_port *);
static void MoxaPortDisable(struct moxa_port *);
static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
static void MoxaPortLineCtrl(struct moxa_port *, int, int);
static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
static int MoxaPortLineStatus(struct moxa_port *);
static void MoxaPortFlushData(struct moxa_port *, int);
static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
static int MoxaPortReadData(struct moxa_port *);
static int MoxaPortTxQueue(struct moxa_port *);
static int MoxaPortRxQueue(struct moxa_port *);
static int MoxaPortTxFree(struct moxa_port *);
static void MoxaPortTxDisable(struct moxa_port *);
static void MoxaPortTxEnable(struct moxa_port *);
static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
static void MoxaSetFifo(struct moxa_port *port, int enable);

/*
 * I/O functions
 */

static void moxa_wait_finish(void __iomem *ofsAddr)
{
	unsigned long end = jiffies + moxaFuncTout;

	while (readw(ofsAddr + FuncCode) != 0)
		if (time_after(jiffies, end))
			return;
	if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
		printk(KERN_WARNING "moxa function expired\n");
}

static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
{
	writew(arg, ofsAddr + FuncArg);
	writew(cmd, ofsAddr + FuncCode);
	moxa_wait_finish(ofsAddr);
}

static void moxa_low_water_check(void __iomem *ofsAddr)
{
	u16 rptr, wptr, mask, len;

	if (readb(ofsAddr + FlagStat) & Xoff_state) {
		rptr = readw(ofsAddr + RXrptr);
		wptr = readw(ofsAddr + RXwptr);
		mask = readw(ofsAddr + RX_mask);
		len = (wptr - rptr) & mask;
		if (len <= Low_water)
			moxafunc(ofsAddr, FC_SendXon, 0);
	}
}

/*
 * TTY operations
 */

static int moxa_ioctl(struct tty_struct *tty, struct file *file,
		      unsigned int cmd, unsigned long arg)
{
	struct moxa_port *ch = tty->driver_data;
	void __user *argp = (void __user *)arg;
	int status, ret = 0;

	if (tty->index == MAX_PORTS) {
		if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
				cmd != MOXA_GETMSTATUS)
			return -EINVAL;
	} else if (!ch)
		return -ENODEV;

	switch (cmd) {
	case MOXA_GETDATACOUNT:
		moxaLog.tick = jiffies;
		if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
			ret = -EFAULT;
		break;
	case MOXA_FLUSH_QUEUE:
		MoxaPortFlushData(ch, arg);
		break;
	case MOXA_GET_IOQUEUE: {
		struct moxaq_str __user *argm = argp;
		struct moxaq_str tmp;
		struct moxa_port *p;
		unsigned int i, j;

		mutex_lock(&moxa_openlock);
		for (i = 0; i < MAX_BOARDS; i++) {
			p = moxa_boards[i].ports;
			for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
				memset(&tmp, 0, sizeof(tmp));
				if (moxa_boards[i].ready) {
					tmp.inq = MoxaPortRxQueue(p);
					tmp.outq = MoxaPortTxQueue(p);
				}
				if (copy_to_user(argm, &tmp, sizeof(tmp))) {
					mutex_unlock(&moxa_openlock);
					return -EFAULT;
				}
			}
		}
		mutex_unlock(&moxa_openlock);
		break;
	} case MOXA_GET_OQUEUE:
		status = MoxaPortTxQueue(ch);
		ret = put_user(status, (unsigned long __user *)argp);
		break;
	case MOXA_GET_IQUEUE:
		status = MoxaPortRxQueue(ch);
		ret = put_user(status, (unsigned long __user *)argp);
		break;
	case MOXA_GETMSTATUS: {
		struct mxser_mstatus __user *argm = argp;
		struct mxser_mstatus tmp;
		struct moxa_port *p;
		unsigned int i, j;

		mutex_lock(&moxa_openlock);
		for (i = 0; i < MAX_BOARDS; i++) {
			p = moxa_boards[i].ports;
			for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
				struct tty_struct *ttyp;
				memset(&tmp, 0, sizeof(tmp));
				if (!moxa_boards[i].ready)
					goto copy;

				status = MoxaPortLineStatus(p);
				if (status & 1)
					tmp.cts = 1;
				if (status & 2)
					tmp.dsr = 1;
				if (status & 4)
					tmp.dcd = 1;

				ttyp = tty_port_tty_get(&p->port);
				if (!ttyp || !ttyp->termios)
					tmp.cflag = p->cflag;
				else
					tmp.cflag = ttyp->termios->c_cflag;
				tty_kref_put(tty);
copy:
				if (copy_to_user(argm, &tmp, sizeof(tmp))) {
					mutex_unlock(&moxa_openlock);
					return -EFAULT;
				}
			}
		}
		mutex_unlock(&moxa_openlock);
		break;
	}
	case TIOCGSERIAL:
		mutex_lock(&moxa_openlock);
		ret = moxa_get_serial_info(ch, argp);
		mutex_unlock(&moxa_openlock);
		break;
	case TIOCSSERIAL:
		mutex_lock(&moxa_openlock);
		ret = moxa_set_serial_info(ch, argp);
		mutex_unlock(&moxa_openlock);
		break;
	default:
		ret = -ENOIOCTLCMD;
	}
	return ret;
}

static int moxa_break_ctl(struct tty_struct *tty, int state)
{
	struct moxa_port *port = tty->driver_data;

	moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
			Magic_code);
	return 0;
}

static const struct tty_operations moxa_ops = {
	.open = moxa_open,
	.close = moxa_close,
	.write = moxa_write,
	.write_room = moxa_write_room,
	.flush_buffer = moxa_flush_buffer,
	.chars_in_buffer = moxa_chars_in_buffer,
	.ioctl = moxa_ioctl,
	.throttle = moxa_throttle,
	.unthrottle = moxa_unthrottle,
	.set_termios = moxa_set_termios,
	.stop = moxa_stop,
	.start = moxa_start,
	.hangup = moxa_hangup,
	.break_ctl = moxa_break_ctl,
	.tiocmget = moxa_tiocmget,
	.tiocmset = moxa_tiocmset,
};

static const struct tty_port_operations moxa_port_ops = {
	.carrier_raised = moxa_carrier_raised,
};

static struct tty_driver *moxaDriver;
static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
static DEFINE_SPINLOCK(moxa_lock);

/*
 * HW init
 */

static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
{
	switch (brd->boardType) {
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
		if (model != 1)
			goto err;
		break;
	case MOXA_BOARD_CP204J:
		if (model != 3)
			goto err;
		break;
	default:
		if (model != 2)
			goto err;
		break;
	}
	return 0;
err:
	return -EINVAL;
}

static int moxa_check_fw(const void *ptr)
{
	const __le16 *lptr = ptr;

	if (*lptr != cpu_to_le16(0x7980))
		return -EINVAL;

	return 0;
}

static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
		size_t len)
{
	void __iomem *baseAddr = brd->basemem;
	u16 tmp;

	writeb(HW_reset, baseAddr + Control_reg);	/* reset */
	msleep(10);
	memset_io(baseAddr, 0, 4096);
	memcpy_toio(baseAddr, buf, len);	/* download BIOS */
	writeb(0, baseAddr + Control_reg);	/* restart */

	msleep(2000);

	switch (brd->boardType) {
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
		tmp = readw(baseAddr + C218_key);
		if (tmp != C218_KeyCode)
			goto err;
		break;
	case MOXA_BOARD_CP204J:
		tmp = readw(baseAddr + C218_key);
		if (tmp != CP204J_KeyCode)
			goto err;
		break;
	default:
		tmp = readw(baseAddr + C320_key);
		if (tmp != C320_KeyCode)
			goto err;
		tmp = readw(baseAddr + C320_status);
		if (tmp != STS_init) {
			printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
					"module not found\n");
			return -EIO;
		}
		break;
	}

	return 0;
err:
	printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
	return -EIO;
}

static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
		size_t len)
{
	void __iomem *baseAddr = brd->basemem;

	if (len < 7168) {
		printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
		return -EINVAL;
	}

	writew(len - 7168 - 2, baseAddr + C320bapi_len);
	writeb(1, baseAddr + Control_reg);	/* Select Page 1 */
	memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
	writeb(2, baseAddr + Control_reg);	/* Select Page 2 */
	memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);

	return 0;
}

static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
		size_t len)
{
	void __iomem *baseAddr = brd->basemem;
	const __le16 *uptr = ptr;
	size_t wlen, len2, j;
	unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
	unsigned int i, retry;
	u16 usum, keycode;

	keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
				C218_KeyCode;

	switch (brd->boardType) {
	case MOXA_BOARD_CP204J:
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
		key = C218_key;
		loadbuf = C218_LoadBuf;
		loadlen = C218DLoad_len;
		checksum = C218check_sum;
		checksum_ok = C218chksum_ok;
		break;
	default:
		key = C320_key;
		keycode = C320_KeyCode;
		loadbuf = C320_LoadBuf;
		loadlen = C320DLoad_len;
		checksum = C320check_sum;
		checksum_ok = C320chksum_ok;
		break;
	}

	usum = 0;
	wlen = len >> 1;
	for (i = 0; i < wlen; i++)
		usum += le16_to_cpu(uptr[i]);
	retry = 0;
	do {
		wlen = len >> 1;
		j = 0;
		while (wlen) {
			len2 = (wlen > 2048) ? 2048 : wlen;
			wlen -= len2;
			memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
			j += len2 << 1;

			writew(len2, baseAddr + loadlen);
			writew(0, baseAddr + key);
			for (i = 0; i < 100; i++) {
				if (readw(baseAddr + key) == keycode)
					break;
				msleep(10);
			}
			if (readw(baseAddr + key) != keycode)
				return -EIO;
		}
		writew(0, baseAddr + loadlen);
		writew(usum, baseAddr + checksum);
		writew(0, baseAddr + key);
		for (i = 0; i < 100; i++) {
			if (readw(baseAddr + key) == keycode)
				break;
			msleep(10);
		}
		retry++;
	} while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
	if (readb(baseAddr + checksum_ok) != 1)
		return -EIO;

	writew(0, baseAddr + key);
	for (i = 0; i < 600; i++) {
		if (readw(baseAddr + Magic_no) == Magic_code)
			break;
		msleep(10);
	}
	if (readw(baseAddr + Magic_no) != Magic_code)
		return -EIO;

	if (MOXA_IS_320(brd)) {
		if (brd->busType == MOXA_BUS_TYPE_PCI) {	/* ASIC board */
			writew(0x3800, baseAddr + TMS320_PORT1);
			writew(0x3900, baseAddr + TMS320_PORT2);
			writew(28499, baseAddr + TMS320_CLOCK);
		} else {
			writew(0x3200, baseAddr + TMS320_PORT1);
			writew(0x3400, baseAddr + TMS320_PORT2);
			writew(19999, baseAddr + TMS320_CLOCK);
		}
	}
	writew(1, baseAddr + Disable_IRQ);
	writew(0, baseAddr + Magic_no);
	for (i = 0; i < 500; i++) {
		if (readw(baseAddr + Magic_no) == Magic_code)
			break;
		msleep(10);
	}
	if (readw(baseAddr + Magic_no) != Magic_code)
		return -EIO;

	if (MOXA_IS_320(brd)) {
		j = readw(baseAddr + Module_cnt);
		if (j <= 0)
			return -EIO;
		brd->numPorts = j * 8;
		writew(j, baseAddr + Module_no);
		writew(0, baseAddr + Magic_no);
		for (i = 0; i < 600; i++) {
			if (readw(baseAddr + Magic_no) == Magic_code)
				break;
			msleep(10);
		}
		if (readw(baseAddr + Magic_no) != Magic_code)
			return -EIO;
	}
	brd->intNdx = baseAddr + IRQindex;
	brd->intPend = baseAddr + IRQpending;
	brd->intTable = baseAddr + IRQtable;

	return 0;
}

static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
		size_t len)
{
	void __iomem *ofsAddr, *baseAddr = brd->basemem;
	struct moxa_port *port;
	int retval, i;

	if (len % 2) {
		printk(KERN_ERR "MOXA: bios length is not even\n");
		return -EINVAL;
	}

	retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
	if (retval)
		return retval;

	switch (brd->boardType) {
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
	case MOXA_BOARD_CP204J:
		port = brd->ports;
		for (i = 0; i < brd->numPorts; i++, port++) {
			port->board = brd;
			port->DCDState = 0;
			port->tableAddr = baseAddr + Extern_table +
					Extern_size * i;
			ofsAddr = port->tableAddr;
			writew(C218rx_mask, ofsAddr + RX_mask);
			writew(C218tx_mask, ofsAddr + TX_mask);
			writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
			writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);

			writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
			writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);

		}
		break;
	default:
		port = brd->ports;
		for (i = 0; i < brd->numPorts; i++, port++) {
			port->board = brd;
			port->DCDState = 0;
			port->tableAddr = baseAddr + Extern_table +
					Extern_size * i;
			ofsAddr = port->tableAddr;
			switch (brd->numPorts) {
			case 8:
				writew(C320p8rx_mask, ofsAddr + RX_mask);
				writew(C320p8tx_mask, ofsAddr + TX_mask);
				writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
				writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
				writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
				writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);

				break;
			case 16:
				writew(C320p16rx_mask, ofsAddr + RX_mask);
				writew(C320p16tx_mask, ofsAddr + TX_mask);
				writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
				writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
				writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
				writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
				break;

			case 24:
				writew(C320p24rx_mask, ofsAddr + RX_mask);
				writew(C320p24tx_mask, ofsAddr + TX_mask);
				writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
				writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
				writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
				writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
				break;
			case 32:
				writew(C320p32rx_mask, ofsAddr + RX_mask);
				writew(C320p32tx_mask, ofsAddr + TX_mask);
				writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
				writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
				writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
				writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
				writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
				break;
			}
		}
		break;
	}
	return 0;
}

static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
{
	const void *ptr = fw->data;
	char rsn[64];
	u16 lens[5];
	size_t len;
	unsigned int a, lenp, lencnt;
	int ret = -EINVAL;
	struct {
		__le32 magic;	/* 0x34303430 */
		u8 reserved1[2];
		u8 type;	/* UNIX = 3 */
		u8 model;	/* C218T=1, C320T=2, CP204=3 */
		u8 reserved2[8];
		__le16 len[5];
	} const *hdr = ptr;

	BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));

	if (fw->size < MOXA_FW_HDRLEN) {
		strcpy(rsn, "too short (even header won't fit)");
		goto err;
	}
	if (hdr->magic != cpu_to_le32(0x30343034)) {
		sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
		goto err;
	}
	if (hdr->type != 3) {
		sprintf(rsn, "not for linux, type is %u", hdr->type);
		goto err;
	}
	if (moxa_check_fw_model(brd, hdr->model)) {
		sprintf(rsn, "not for this card, model is %u", hdr->model);
		goto err;
	}

	len = MOXA_FW_HDRLEN;
	lencnt = hdr->model == 2 ? 5 : 3;
	for (a = 0; a < ARRAY_SIZE(lens); a++) {
		lens[a] = le16_to_cpu(hdr->len[a]);
		if (lens[a] && len + lens[a] <= fw->size &&
				moxa_check_fw(&fw->data[len]))
			printk(KERN_WARNING "MOXA firmware: unexpected input "
				"at offset %u, but going on\n", (u32)len);
		if (!lens[a] && a < lencnt) {
			sprintf(rsn, "too few entries in fw file");
			goto err;
		}
		len += lens[a];
	}

	if (len != fw->size) {
		sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
				(u32)len);
		goto err;
	}

	ptr += MOXA_FW_HDRLEN;
	lenp = 0; /* bios */

	strcpy(rsn, "read above");

	ret = moxa_load_bios(brd, ptr, lens[lenp]);
	if (ret)
		goto err;

	/* we skip the tty section (lens[1]), since we don't need it */
	ptr += lens[lenp] + lens[lenp + 1];
	lenp += 2; /* comm */

	if (hdr->model == 2) {
		ret = moxa_load_320b(brd, ptr, lens[lenp]);
		if (ret)
			goto err;
		/* skip another tty */
		ptr += lens[lenp] + lens[lenp + 1];
		lenp += 2;
	}

	ret = moxa_load_code(brd, ptr, lens[lenp]);
	if (ret)
		goto err;

	return 0;
err:
	printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
	return ret;
}

static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
{
	const struct firmware *fw;
	const char *file;
	struct moxa_port *p;
	unsigned int i;
	int ret;

	brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
			GFP_KERNEL);
	if (brd->ports == NULL) {
		printk(KERN_ERR "cannot allocate memory for ports\n");
		ret = -ENOMEM;
		goto err;
	}

	for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
		tty_port_init(&p->port);
		p->port.ops = &moxa_port_ops;
		p->type = PORT_16550A;
		p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
	}

	switch (brd->boardType) {
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
		file = "c218tunx.cod";
		break;
	case MOXA_BOARD_CP204J:
		file = "cp204unx.cod";
		break;
	default:
		file = "c320tunx.cod";
		break;
	}

	ret = request_firmware(&fw, file, dev);
	if (ret) {
		printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
				"you've placed '%s' file into your firmware "
				"loader directory (e.g. /lib/firmware)\n",
				file);
		goto err_free;
	}

	ret = moxa_load_fw(brd, fw);

	release_firmware(fw);

	if (ret)
		goto err_free;

	spin_lock_bh(&moxa_lock);
	brd->ready = 1;
	if (!timer_pending(&moxaTimer))
		mod_timer(&moxaTimer, jiffies + HZ / 50);
	spin_unlock_bh(&moxa_lock);

	return 0;
err_free:
	kfree(brd->ports);
err:
	return ret;
}

static void moxa_board_deinit(struct moxa_board_conf *brd)
{
	unsigned int a, opened;

	mutex_lock(&moxa_openlock);
	spin_lock_bh(&moxa_lock);
	brd->ready = 0;
	spin_unlock_bh(&moxa_lock);

	/* pci hot-un-plug support */
	for (a = 0; a < brd->numPorts; a++)
		if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
			struct tty_struct *tty = tty_port_tty_get(
						&brd->ports[a].port);
			if (tty) {
				tty_hangup(tty);
				tty_kref_put(tty);
			}
		}
	while (1) {
		opened = 0;
		for (a = 0; a < brd->numPorts; a++)
			if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
				opened++;
		mutex_unlock(&moxa_openlock);
		if (!opened)
			break;
		msleep(50);
		mutex_lock(&moxa_openlock);
	}

	iounmap(brd->basemem);
	brd->basemem = NULL;
	kfree(brd->ports);
}

#ifdef CONFIG_PCI
static int __devinit moxa_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
{
	struct moxa_board_conf *board;
	unsigned int i;
	int board_type = ent->driver_data;
	int retval;

	retval = pci_enable_device(pdev);
	if (retval) {
		dev_err(&pdev->dev, "can't enable pci device\n");
		goto err;
	}

	for (i = 0; i < MAX_BOARDS; i++)
		if (moxa_boards[i].basemem == NULL)
			break;

	retval = -ENODEV;
	if (i >= MAX_BOARDS) {
		dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
				"found. Board is ignored.\n", MAX_BOARDS);
		goto err;
	}

	board = &moxa_boards[i];

	retval = pci_request_region(pdev, 2, "moxa-base");
	if (retval) {
		dev_err(&pdev->dev, "can't request pci region 2\n");
		goto err;
	}

	board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
	if (board->basemem == NULL) {
		dev_err(&pdev->dev, "can't remap io space 2\n");
		goto err_reg;
	}

	board->boardType = board_type;
	switch (board_type) {
	case MOXA_BOARD_C218_ISA:
	case MOXA_BOARD_C218_PCI:
		board->numPorts = 8;
		break;

	case MOXA_BOARD_CP204J:
		board->numPorts = 4;
		break;
	default:
		board->numPorts = 0;
		break;
	}
	board->busType = MOXA_BUS_TYPE_PCI;

	retval = moxa_init_board(board, &pdev->dev);
	if (retval)
		goto err_base;

	pci_set_drvdata(pdev, board);

	dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
			moxa_brdname[board_type - 1], board->numPorts);

	return 0;
err_base:
	iounmap(board->basemem);
	board->basemem = NULL;
err_reg:
	pci_release_region(pdev, 2);
err:
	return retval;
}

static void __devexit moxa_pci_remove(struct pci_dev *pdev)
{
	struct moxa_board_conf *brd = pci_get_drvdata(pdev);

	moxa_board_deinit(brd);

	pci_release_region(pdev, 2);
}

static struct pci_driver moxa_pci_driver = {
	.name = "moxa",
	.id_table = moxa_pcibrds,
	.probe = moxa_pci_probe,
	.remove = __devexit_p(moxa_pci_remove)
};
#endif /* CONFIG_PCI */

static int __init moxa_init(void)
{
	unsigned int isabrds = 0;
	int retval = 0;

	printk(KERN_INFO "MOXA Intellio family driver version %s\n",
			MOXA_VERSION);
	moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
	if (!moxaDriver)
		return -ENOMEM;

	moxaDriver->owner = THIS_MODULE;
	moxaDriver->name = "ttyMX";
	moxaDriver->major = ttymajor;
	moxaDriver->minor_start = 0;
	moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
	moxaDriver->subtype = SERIAL_TYPE_NORMAL;
	moxaDriver->init_termios = tty_std_termios;
	moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
	moxaDriver->init_termios.c_ispeed = 9600;
	moxaDriver->init_termios.c_ospeed = 9600;
	moxaDriver->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(moxaDriver, &moxa_ops);

	if (tty_register_driver(moxaDriver)) {
		printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
		put_tty_driver(moxaDriver);
		return -1;
	}

	/* Find the boards defined from module args. */
#ifdef MODULE
	{
	struct moxa_board_conf *brd = moxa_boards;
	unsigned int i;
	for (i = 0; i < MAX_BOARDS; i++) {
		if (!baseaddr[i])
			break;
		if (type[i] == MOXA_BOARD_C218_ISA ||
				type[i] == MOXA_BOARD_C320_ISA) {
			pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
					isabrds + 1, moxa_brdname[type[i] - 1],
					baseaddr[i]);
			brd->boardType = type[i];
			brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
					numports[i];
			brd->busType = MOXA_BUS_TYPE_ISA;
			brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
			if (!brd->basemem) {
				printk(KERN_ERR "MOXA: can't remap %lx\n",
						baseaddr[i]);
				continue;
			}
			if (moxa_init_board(brd, NULL)) {
				iounmap(brd->basemem);
				brd->basemem = NULL;
				continue;
			}

			printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
					"ready (%u ports, firmware loaded)\n",
					baseaddr[i], brd->numPorts);

			brd++;
			isabrds++;
		}
	}
	}
#endif

#ifdef CONFIG_PCI
	retval = pci_register_driver(&moxa_pci_driver);
	if (retval) {
		printk(KERN_ERR "Can't register MOXA pci driver!\n");
		if (isabrds)
			retval = 0;
	}
#endif

	return retval;
}

static void __exit moxa_exit(void)
{
	unsigned int i;

#ifdef CONFIG_PCI
	pci_unregister_driver(&moxa_pci_driver);
#endif

	for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
		if (moxa_boards[i].ready)
			moxa_board_deinit(&moxa_boards[i]);

	del_timer_sync(&moxaTimer);

	if (tty_unregister_driver(moxaDriver))
		printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
				"serial driver\n");
	put_tty_driver(moxaDriver);
}

module_init(moxa_init);
module_exit(moxa_exit);

static void moxa_close_port(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;
	moxa_shut_down(tty);
	MoxaPortFlushData(ch, 2);
	ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
	tty->driver_data = NULL;
	tty_port_tty_set(&ch->port, NULL);
}

static int moxa_carrier_raised(struct tty_port *port)
{
	struct moxa_port *ch = container_of(port, struct moxa_port, port);
	int dcd;

	spin_lock_bh(&moxa_lock);
	dcd = ch->DCDState;
	spin_unlock_bh(&moxa_lock);
	return dcd;
}

static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
			    struct moxa_port *ch)
{
	struct tty_port *port = &ch->port;
	DEFINE_WAIT(wait);
	int retval = 0;
	u8 dcd;

	while (1) {
		prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
		if (tty_hung_up_p(filp)) {
#ifdef SERIAL_DO_RESTART
			retval = -ERESTARTSYS;
#else
			retval = -EAGAIN;
#endif
			break;
		}
		dcd = tty_port_carrier_raised(port);
		if (dcd)
			break;

		if (signal_pending(current)) {
			retval = -ERESTARTSYS;
			break;
		}
		schedule();
	}
	finish_wait(&port->open_wait, &wait);

	return retval;
}

static int moxa_open(struct tty_struct *tty, struct file *filp)
{
	struct moxa_board_conf *brd;
	struct moxa_port *ch;
	int port;
	int retval;

	port = tty->index;
	if (port == MAX_PORTS) {
		return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
	}
	if (mutex_lock_interruptible(&moxa_openlock))
		return -ERESTARTSYS;
	brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
	if (!brd->ready) {
		mutex_unlock(&moxa_openlock);
		return -ENODEV;
	}

	ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
	ch->port.count++;
	tty->driver_data = ch;
	tty_port_tty_set(&ch->port, tty);
	if (!(ch->port.flags & ASYNC_INITIALIZED)) {
		ch->statusflags = 0;
		moxa_set_tty_param(tty, tty->termios);
		MoxaPortLineCtrl(ch, 1, 1);
		MoxaPortEnable(ch);
		MoxaSetFifo(ch, ch->type == PORT_16550A);
		ch->port.flags |= ASYNC_INITIALIZED;
	}
	mutex_unlock(&moxa_openlock);

	retval = 0;
	if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
		retval = moxa_block_till_ready(tty, filp, ch);
	mutex_lock(&moxa_openlock);
	if (retval) {
		if (ch->port.count) /* 0 means already hung up... */
			if (--ch->port.count == 0)
				moxa_close_port(tty);
	} else
		ch->port.flags |= ASYNC_NORMAL_ACTIVE;
	mutex_unlock(&moxa_openlock);

	return retval;
}

static void moxa_close(struct tty_struct *tty, struct file *filp)
{
	struct moxa_port *ch;
	int port;

	port = tty->index;
	if (port == MAX_PORTS || tty_hung_up_p(filp))
		return;

	mutex_lock(&moxa_openlock);
	ch = tty->driver_data;
	if (ch == NULL)
		goto unlock;
	if (tty->count == 1 && ch->port.count != 1) {
		printk(KERN_WARNING "moxa_close: bad serial port count; "
			"tty->count is 1, ch->port.count is %d\n", ch->port.count);
		ch->port.count = 1;
	}
	if (--ch->port.count < 0) {
		printk(KERN_WARNING "moxa_close: bad serial port count, "
			"device=%s\n", tty->name);
		ch->port.count = 0;
	}
	if (ch->port.count)
		goto unlock;

	ch->cflag = tty->termios->c_cflag;
	if (ch->port.flags & ASYNC_INITIALIZED) {
		moxa_setup_empty_event(tty);
		tty_wait_until_sent(tty, 30 * HZ);	/* 30 seconds timeout */
	}

	moxa_close_port(tty);
unlock:
	mutex_unlock(&moxa_openlock);
}

static int moxa_write(struct tty_struct *tty,
		      const unsigned char *buf, int count)
{
	struct moxa_port *ch = tty->driver_data;
	int len;

	if (ch == NULL)
		return 0;

	spin_lock_bh(&moxa_lock);
	len = MoxaPortWriteData(tty, buf, count);
	spin_unlock_bh(&moxa_lock);

	ch->statusflags |= LOWWAIT;
	return len;
}

static int moxa_write_room(struct tty_struct *tty)
{
	struct moxa_port *ch;

	if (tty->stopped)
		return 0;
	ch = tty->driver_data;
	if (ch == NULL)
		return 0;
	return MoxaPortTxFree(ch);
}

static void moxa_flush_buffer(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	if (ch == NULL)
		return;
	MoxaPortFlushData(ch, 1);
	tty_wakeup(tty);
}

static int moxa_chars_in_buffer(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;
	int chars;

	/*
	 * Sigh...I have to check if driver_data is NULL here, because
	 * if an open() fails, the TTY subsystem eventually calls
	 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
	 * routine.  And since the open() failed, we return 0 here.  TDJ
	 */
	if (ch == NULL)
		return 0;
	lock_kernel();
	chars = MoxaPortTxQueue(ch);
	if (chars) {
		/*
		 * Make it possible to wakeup anything waiting for output
		 * in tty_ioctl.c, etc.
		 */
		if (!(ch->statusflags & EMPTYWAIT))
			moxa_setup_empty_event(tty);
	}
	unlock_kernel();
	return chars;
}

static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct moxa_port *ch;
	int flag = 0, dtr, rts;

	mutex_lock(&moxa_openlock);
	ch = tty->driver_data;
	if (!ch) {
		mutex_unlock(&moxa_openlock);
		return -EINVAL;
	}

	MoxaPortGetLineOut(ch, &dtr, &rts);
	if (dtr)
		flag |= TIOCM_DTR;
	if (rts)
		flag |= TIOCM_RTS;
	dtr = MoxaPortLineStatus(ch);
	if (dtr & 1)
		flag |= TIOCM_CTS;
	if (dtr & 2)
		flag |= TIOCM_DSR;
	if (dtr & 4)
		flag |= TIOCM_CD;
	mutex_unlock(&moxa_openlock);
	return flag;
}

static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear)
{
	struct moxa_port *ch;
	int port;
	int dtr, rts;

	port = tty->index;
	mutex_lock(&moxa_openlock);
	ch = tty->driver_data;
	if (!ch) {
		mutex_unlock(&moxa_openlock);
		return -EINVAL;
	}

	MoxaPortGetLineOut(ch, &dtr, &rts);
	if (set & TIOCM_RTS)
		rts = 1;
	if (set & TIOCM_DTR)
		dtr = 1;
	if (clear & TIOCM_RTS)
		rts = 0;
	if (clear & TIOCM_DTR)
		dtr = 0;
	MoxaPortLineCtrl(ch, dtr, rts);
	mutex_unlock(&moxa_openlock);
	return 0;
}

static void moxa_throttle(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	ch->statusflags |= THROTTLE;
}

static void moxa_unthrottle(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	ch->statusflags &= ~THROTTLE;
}

static void moxa_set_termios(struct tty_struct *tty,
		struct ktermios *old_termios)
{
	struct moxa_port *ch = tty->driver_data;

	if (ch == NULL)
		return;
	moxa_set_tty_param(tty, old_termios);
	if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
		wake_up_interruptible(&ch->port.open_wait);
}

static void moxa_stop(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	if (ch == NULL)
		return;
	MoxaPortTxDisable(ch);
	ch->statusflags |= TXSTOPPED;
}


static void moxa_start(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	if (ch == NULL)
		return;

	if (!(ch->statusflags & TXSTOPPED))
		return;

	MoxaPortTxEnable(ch);
	ch->statusflags &= ~TXSTOPPED;
}

static void moxa_hangup(struct tty_struct *tty)
{
	struct moxa_port *ch;

	mutex_lock(&moxa_openlock);
	ch = tty->driver_data;
	if (ch == NULL) {
		mutex_unlock(&moxa_openlock);
		return;
	}
	ch->port.count = 0;
	moxa_close_port(tty);
	mutex_unlock(&moxa_openlock);

	wake_up_interruptible(&ch->port.open_wait);
}

static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
{
	struct tty_struct *tty;
	dcd = !!dcd;

	if (dcd != p->DCDState) {
		tty = tty_port_tty_get(&p->port);
		if (tty && C_CLOCAL(tty) && !dcd)
			tty_hangup(tty);
		tty_kref_put(tty);
	}
	p->DCDState = dcd;
}

static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
		u16 __iomem *ip)
{
	struct tty_struct *tty = tty_port_tty_get(&p->port);
	void __iomem *ofsAddr;
	unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
	u16 intr;

	if (tty) {
		if ((p->statusflags & EMPTYWAIT) &&
				MoxaPortTxQueue(p) == 0) {
			p->statusflags &= ~EMPTYWAIT;
			tty_wakeup(tty);
		}
		if ((p->statusflags & LOWWAIT) && !tty->stopped &&
				MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
			p->statusflags &= ~LOWWAIT;
			tty_wakeup(tty);
		}

		if (inited && !(p->statusflags & THROTTLE) &&
				MoxaPortRxQueue(p) > 0) { /* RX */
			MoxaPortReadData(p);
			tty_schedule_flip(tty);
		}
	} else {
		p->statusflags &= ~EMPTYWAIT;
		MoxaPortFlushData(p, 0); /* flush RX */
	}

	if (!handle) /* nothing else to do */
		goto put;

	intr = readw(ip); /* port irq status */
	if (intr == 0)
		goto put;

	writew(0, ip); /* ACK port */
	ofsAddr = p->tableAddr;
	if (intr & IntrTx) /* disable tx intr */
		writew(readw(ofsAddr + HostStat) & ~WakeupTx,
				ofsAddr + HostStat);

	if (!inited)
		goto put;

	if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
		tty_insert_flip_char(tty, 0, TTY_BREAK);
		tty_schedule_flip(tty);
	}

	if (intr & IntrLine)
		moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
put:
	tty_kref_put(tty);

	return 0;
}

static void moxa_poll(unsigned long ignored)
{
	struct moxa_board_conf *brd;
	u16 __iomem *ip;
	unsigned int card, port, served = 0;

	spin_lock(&moxa_lock);
	for (card = 0; card < MAX_BOARDS; card++) {
		brd = &moxa_boards[card];
		if (!brd->ready)
			continue;

		served++;

		ip = NULL;
		if (readb(brd->intPend) == 0xff)
			ip = brd->intTable + readb(brd->intNdx);

		for (port = 0; port < brd->numPorts; port++)
			moxa_poll_port(&brd->ports[port], !!ip, ip + port);

		if (ip)
			writeb(0, brd->intPend); /* ACK */

		if (moxaLowWaterChk) {
			struct moxa_port *p = brd->ports;
			for (port = 0; port < brd->numPorts; port++, p++)
				if (p->lowChkFlag) {
					p->lowChkFlag = 0;
					moxa_low_water_check(p->tableAddr);
				}
		}
	}
	moxaLowWaterChk = 0;

	if (served)
		mod_timer(&moxaTimer, jiffies + HZ / 50);
	spin_unlock(&moxa_lock);
}

/******************************************************************************/

static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
{
	register struct ktermios *ts = tty->termios;
	struct moxa_port *ch = tty->driver_data;
	int rts, cts, txflow, rxflow, xany, baud;

	rts = cts = txflow = rxflow = xany = 0;
	if (ts->c_cflag & CRTSCTS)
		rts = cts = 1;
	if (ts->c_iflag & IXON)
		txflow = 1;
	if (ts->c_iflag & IXOFF)
		rxflow = 1;
	if (ts->c_iflag & IXANY)
		xany = 1;

	/* Clear the features we don't support */
	ts->c_cflag &= ~CMSPAR;
	MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
	baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
	if (baud == -1)
		baud = tty_termios_baud_rate(old_termios);
	/* Not put the baud rate into the termios data */
	tty_encode_baud_rate(tty, baud, baud);
}

static void moxa_setup_empty_event(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	spin_lock_bh(&moxa_lock);
	ch->statusflags |= EMPTYWAIT;
	spin_unlock_bh(&moxa_lock);
}

static void moxa_shut_down(struct tty_struct *tty)
{
	struct moxa_port *ch = tty->driver_data;

	if (!(ch->port.flags & ASYNC_INITIALIZED))
		return;

	MoxaPortDisable(ch);

	/*
	 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
	 */
	if (C_HUPCL(tty))
		MoxaPortLineCtrl(ch, 0, 0);

	spin_lock_bh(&moxa_lock);
	ch->port.flags &= ~ASYNC_INITIALIZED;
	spin_unlock_bh(&moxa_lock);
}

/*****************************************************************************
 *	Driver level functions: 					     *
 *****************************************************************************/

static void MoxaPortFlushData(struct moxa_port *port, int mode)
{
	void __iomem *ofsAddr;
	if (mode < 0 || mode > 2)
		return;
	ofsAddr = port->tableAddr;
	moxafunc(ofsAddr, FC_FlushQueue, mode);
	if (mode != 1) {
		port->lowChkFlag = 0;
		moxa_low_water_check(ofsAddr);
	}
}

/*
 *    Moxa Port Number Description:
 *
 *      MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
 *      the port number using in MOXA driver functions will be 0 to 31 for
 *      first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
 *      to 127 for fourth. For example, if you setup three MOXA boards,
 *      first board is C218, second board is C320-16 and third board is
 *      C320-32. The port number of first board (C218 - 8 ports) is from
 *      0 to 7. The port number of second board (C320 - 16 ports) is form
 *      32 to 47. The port number of third board (C320 - 32 ports) is from
 *      64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
 *      127 will be invalid.
 *
 *
 *      Moxa Functions Description:
 *
 *      Function 1:     Driver initialization routine, this routine must be
 *                      called when initialized driver.
 *      Syntax:
 *      void MoxaDriverInit();
 *
 *
 *      Function 2:     Moxa driver private IOCTL command processing.
 *      Syntax:
 *      int  MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
 *
 *           unsigned int cmd   : IOCTL command
 *           unsigned long arg  : IOCTL argument
 *           int port           : port number (0 - 127)
 *
 *           return:    0  (OK)
 *                      -EINVAL
 *                      -ENOIOCTLCMD
 *
 *
 *      Function 6:     Enable this port to start Tx/Rx data.
 *      Syntax:
 *      void MoxaPortEnable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 7:     Disable this port
 *      Syntax:
 *      void MoxaPortDisable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 10:    Setting baud rate of this port.
 *      Syntax:
 *      speed_t MoxaPortSetBaud(int port, speed_t baud);
 *           int port           : port number (0 - 127)
 *           long baud          : baud rate (50 - 115200)
 *
 *           return:    0       : this port is invalid or baud < 50
 *                      50 - 115200 : the real baud rate set to the port, if
 *                                    the argument baud is large than maximun
 *                                    available baud rate, the real setting
 *                                    baud rate will be the maximun baud rate.
 *
 *
 *      Function 12:    Configure the port.
 *      Syntax:
 *      int  MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
 *           int port           : port number (0 - 127)
 *           struct ktermios * termio : termio structure pointer
 *	     speed_t baud	: baud rate
 *
 *           return:    -1      : this port is invalid or termio == NULL
 *                      0       : setting O.K.
 *
 *
 *      Function 13:    Get the DTR/RTS state of this port.
 *      Syntax:
 *      int  MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
 *           int port           : port number (0 - 127)
 *           int * dtrState     : pointer to INT to receive the current DTR
 *                                state. (if NULL, this function will not
 *                                write to this address)
 *           int * rtsState     : pointer to INT to receive the current RTS
 *                                state. (if NULL, this function will not
 *                                write to this address)
 *
 *           return:    -1      : this port is invalid
 *                      0       : O.K.
 *
 *
 *      Function 14:    Setting the DTR/RTS output state of this port.
 *      Syntax:
 *      void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
 *           int port           : port number (0 - 127)
 *           int dtrState       : DTR output state (0: off, 1: on)
 *           int rtsState       : RTS output state (0: off, 1: on)
 *
 *
 *      Function 15:    Setting the flow control of this port.
 *      Syntax:
 *      void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
 *                            int txFlow,int xany);
 *           int port           : port number (0 - 127)
 *           int rtsFlow        : H/W RTS flow control (0: no, 1: yes)
 *           int ctsFlow        : H/W CTS flow control (0: no, 1: yes)
 *           int rxFlow         : S/W Rx XON/XOFF flow control (0: no, 1: yes)
 *           int txFlow         : S/W Tx XON/XOFF flow control (0: no, 1: yes)
 *           int xany           : S/W XANY flow control (0: no, 1: yes)
 *
 *
 *      Function 16:    Get ths line status of this port
 *      Syntax:
 *      int  MoxaPortLineStatus(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    Bit 0 - CTS state (0: off, 1: on)
 *                      Bit 1 - DSR state (0: off, 1: on)
 *                      Bit 2 - DCD state (0: off, 1: on)
 *
 *
 *      Function 19:    Flush the Rx/Tx buffer data of this port.
 *      Syntax:
 *      void MoxaPortFlushData(int port, int mode);
 *           int port           : port number (0 - 127)
 *           int mode    
 *                      0       : flush the Rx buffer 
 *                      1       : flush the Tx buffer 
 *                      2       : flush the Rx and Tx buffer 
 *
 *
 *      Function 20:    Write data.
 *      Syntax:
 *      int  MoxaPortWriteData(int port, unsigned char * buffer, int length);
 *           int port           : port number (0 - 127)
 *           unsigned char * buffer     : pointer to write data buffer.
 *           int length         : write data length
 *
 *           return:    0 - length      : real write data length
 *
 *
 *      Function 21:    Read data.
 *      Syntax:
 *      int  MoxaPortReadData(int port, struct tty_struct *tty);
 *           int port           : port number (0 - 127)
 *	     struct tty_struct *tty : tty for data
 *
 *           return:    0 - length      : real read data length
 *
 *
 *      Function 24:    Get the Tx buffer current queued data bytes
 *      Syntax:
 *      int  MoxaPortTxQueue(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    ..      : Tx buffer current queued data bytes
 *
 *
 *      Function 25:    Get the Tx buffer current free space
 *      Syntax:
 *      int  MoxaPortTxFree(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    ..      : Tx buffer current free space
 *
 *
 *      Function 26:    Get the Rx buffer current queued data bytes
 *      Syntax:
 *      int  MoxaPortRxQueue(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    ..      : Rx buffer current queued data bytes
 *
 *
 *      Function 28:    Disable port data transmission.
 *      Syntax:
 *      void MoxaPortTxDisable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 29:    Enable port data transmission.
 *      Syntax:
 *      void MoxaPortTxEnable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 31:    Get the received BREAK signal count and reset it.
 *      Syntax:
 *      int  MoxaPortResetBrkCnt(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    0 - ..  : BREAK signal count
 *
 *
 */

static void MoxaPortEnable(struct moxa_port *port)
{
	void __iomem *ofsAddr;
	u16 lowwater = 512;

	ofsAddr = port->tableAddr;
	writew(lowwater, ofsAddr + Low_water);
	if (MOXA_IS_320(port->board))
		moxafunc(ofsAddr, FC_SetBreakIrq, 0);
	else
		writew(readw(ofsAddr + HostStat) | WakeupBreak,
				ofsAddr + HostStat);

	moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
	moxafunc(ofsAddr, FC_FlushQueue, 2);

	moxafunc(ofsAddr, FC_EnableCH, Magic_code);
	MoxaPortLineStatus(port);
}

static void MoxaPortDisable(struct moxa_port *port)
{
	void __iomem *ofsAddr = port->tableAddr;

	moxafunc(ofsAddr, FC_SetFlowCtl, 0);	/* disable flow control */
	moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
	writew(0, ofsAddr + HostStat);
	moxafunc(ofsAddr, FC_DisableCH, Magic_code);
}

static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
{
	void __iomem *ofsAddr = port->tableAddr;
	unsigned int clock, val;
	speed_t max;

	max = MOXA_IS_320(port->board) ? 460800 : 921600;
	if (baud < 50)
		return 0;
	if (baud > max)
		baud = max;
	clock = 921600;
	val = clock / baud;
	moxafunc(ofsAddr, FC_SetBaud, val);
	baud = clock / val;
	return baud;
}

static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
		speed_t baud)
{
	void __iomem *ofsAddr;
	tcflag_t cflag;
	tcflag_t mode = 0;

	ofsAddr = port->tableAddr;
	cflag = termio->c_cflag;	/* termio->c_cflag */

	mode = termio->c_cflag & CSIZE;
	if (mode == CS5)
		mode = MX_CS5;
	else if (mode == CS6)
		mode = MX_CS6;
	else if (mode == CS7)
		mode = MX_CS7;
	else if (mode == CS8)
		mode = MX_CS8;

	if (termio->c_cflag & CSTOPB) {
		if (mode == MX_CS5)
			mode |= MX_STOP15;
		else
			mode |= MX_STOP2;
	} else
		mode |= MX_STOP1;

	if (termio->c_cflag & PARENB) {
		if (termio->c_cflag & PARODD)
			mode |= MX_PARODD;
		else
			mode |= MX_PAREVEN;
	} else
		mode |= MX_PARNONE;

	moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);

	if (MOXA_IS_320(port->board) && baud >= 921600)
		return -1;

	baud = MoxaPortSetBaud(port, baud);

	if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
		writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
		writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
		writeb(FC_SetXonXoff, ofsAddr + FuncCode);
		moxa_wait_finish(ofsAddr);

	}
	return baud;
}

static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
		int *rtsState)
{
	if (dtrState)
		*dtrState = !!(port->lineCtrl & DTR_ON);
	if (rtsState)
		*rtsState = !!(port->lineCtrl & RTS_ON);

	return 0;
}

static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
{
	u8 mode = 0;

	if (dtr)
		mode |= DTR_ON;
	if (rts)
		mode |= RTS_ON;
	port->lineCtrl = mode;
	moxafunc(port->tableAddr, FC_LineControl, mode);
}

static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
		int txflow, int rxflow, int txany)
{
	int mode = 0;

	if (rts)
		mode |= RTS_FlowCtl;
	if (cts)
		mode |= CTS_FlowCtl;
	if (txflow)
		mode |= Tx_FlowCtl;
	if (rxflow)
		mode |= Rx_FlowCtl;
	if (txany)
		mode |= IXM_IXANY;
	moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
}

static int MoxaPortLineStatus(struct moxa_port *port)
{
	void __iomem *ofsAddr;
	int val;

	ofsAddr = port->tableAddr;
	if (MOXA_IS_320(port->board)) {
		moxafunc(ofsAddr, FC_LineStatus, 0);
		val = readw(ofsAddr + FuncArg);
	} else {
		val = readw(ofsAddr + FlagStat) >> 4;
	}
	val &= 0x0B;
	if (val & 8)
		val |= 4;
	spin_lock_bh(&moxa_lock);
	moxa_new_dcdstate(port, val & 8);
	spin_unlock_bh(&moxa_lock);
	val &= 7;
	return val;
}

static int MoxaPortWriteData(struct tty_struct *tty,
		const unsigned char *buffer, int len)
{
	struct moxa_port *port = tty->driver_data;
	void __iomem *baseAddr, *ofsAddr, *ofs;
	unsigned int c, total;
	u16 head, tail, tx_mask, spage, epage;
	u16 pageno, pageofs, bufhead;

	ofsAddr = port->tableAddr;
	baseAddr = port->board->basemem;
	tx_mask = readw(ofsAddr + TX_mask);
	spage = readw(ofsAddr + Page_txb);
	epage = readw(ofsAddr + EndPage_txb);
	tail = readw(ofsAddr + TXwptr);
	head = readw(ofsAddr + TXrptr);
	c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
	if (c > len)
		c = len;
	moxaLog.txcnt[port->port.tty->index] += c;
	total = c;
	if (spage == epage) {
		bufhead = readw(ofsAddr + Ofs_txb);
		writew(spage, baseAddr + Control_reg);
		while (c > 0) {
			if (head > tail)
				len = head - tail - 1;
			else
				len = tx_mask + 1 - tail;
			len = (c > len) ? len : c;
			ofs = baseAddr + DynPage_addr + bufhead + tail;
			memcpy_toio(ofs, buffer, len);
			buffer += len;
			tail = (tail + len) & tx_mask;
			c -= len;
		}
	} else {
		pageno = spage + (tail >> 13);
		pageofs = tail & Page_mask;
		while (c > 0) {
			len = Page_size - pageofs;
			if (len > c)
				len = c;
			writeb(pageno, baseAddr + Control_reg);
			ofs = baseAddr + DynPage_addr + pageofs;
			memcpy_toio(ofs, buffer, len);
			buffer += len;
			if (++pageno == epage)
				pageno = spage;
			pageofs = 0;
			c -= len;
		}
		tail = (tail + total) & tx_mask;
	}
	writew(tail, ofsAddr + TXwptr);
	writeb(1, ofsAddr + CD180TXirq);	/* start to send */
	return total;
}

static int MoxaPortReadData(struct moxa_port *port)
{
	struct tty_struct *tty = port->port.tty;
	unsigned char *dst;
	void __iomem *baseAddr, *ofsAddr, *ofs;
	unsigned int count, len, total;
	u16 tail, rx_mask, spage, epage;
	u16 pageno, pageofs, bufhead, head;

	ofsAddr = port->tableAddr;
	baseAddr = port->board->basemem;
	head = readw(ofsAddr + RXrptr);
	tail = readw(ofsAddr + RXwptr);
	rx_mask = readw(ofsAddr + RX_mask);
	spage = readw(ofsAddr + Page_rxb);
	epage = readw(ofsAddr + EndPage_rxb);
	count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
	if (count == 0)
		return 0;

	total = count;
	moxaLog.rxcnt[tty->index] += total;
	if (spage == epage) {
		bufhead = readw(ofsAddr + Ofs_rxb);
		writew(spage, baseAddr + Control_reg);
		while (count > 0) {
			ofs = baseAddr + DynPage_addr + bufhead + head;
			len = (tail >= head) ? (tail - head) :
					(rx_mask + 1 - head);
			len = tty_prepare_flip_string(tty, &dst,
					min(len, count));
			memcpy_fromio(dst, ofs, len);
			head = (head + len) & rx_mask;
			count -= len;
		}
	} else {
		pageno = spage + (head >> 13);
		pageofs = head & Page_mask;
		while (count > 0) {
			writew(pageno, baseAddr + Control_reg);
			ofs = baseAddr + DynPage_addr + pageofs;
			len = tty_prepare_flip_string(tty, &dst,
					min(Page_size - pageofs, count));
			memcpy_fromio(dst, ofs, len);

			count -= len;
			pageofs = (pageofs + len) & Page_mask;
			if (pageofs == 0 && ++pageno == epage)
				pageno = spage;
		}
		head = (head + total) & rx_mask;
	}
	writew(head, ofsAddr + RXrptr);
	if (readb(ofsAddr + FlagStat) & Xoff_state) {
		moxaLowWaterChk = 1;
		port->lowChkFlag = 1;
	}
	return total;
}


static int MoxaPortTxQueue(struct moxa_port *port)
{
	void __iomem *ofsAddr = port->tableAddr;
	u16 rptr, wptr, mask;

	rptr = readw(ofsAddr + TXrptr);
	wptr = readw(ofsAddr + TXwptr);
	mask = readw(ofsAddr + TX_mask);
	return (wptr - rptr) & mask;
}

static int MoxaPortTxFree(struct moxa_port *port)
{
	void __iomem *ofsAddr = port->tableAddr;
	u16 rptr, wptr, mask;

	rptr = readw(ofsAddr + TXrptr);
	wptr = readw(ofsAddr + TXwptr);
	mask = readw(ofsAddr + TX_mask);
	return mask - ((wptr - rptr) & mask);
}

static int MoxaPortRxQueue(struct moxa_port *port)
{
	void __iomem *ofsAddr = port->tableAddr;
	u16 rptr, wptr, mask;

	rptr = readw(ofsAddr + RXrptr);
	wptr = readw(ofsAddr + RXwptr);
	mask = readw(ofsAddr + RX_mask);
	return (wptr - rptr) & mask;
}

static void MoxaPortTxDisable(struct moxa_port *port)
{
	moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
}

static void MoxaPortTxEnable(struct moxa_port *port)
{
	moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
}

static int moxa_get_serial_info(struct moxa_port *info,
		struct serial_struct __user *retinfo)
{
	struct serial_struct tmp = {
		.type = info->type,
		.line = info->port.tty->index,
		.flags = info->port.flags,
		.baud_base = 921600,
		.close_delay = info->port.close_delay
	};
	return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
}


static int moxa_set_serial_info(struct moxa_port *info,
		struct serial_struct __user *new_info)
{
	struct serial_struct new_serial;

	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
		return -EFAULT;

	if (new_serial.irq != 0 || new_serial.port != 0 ||
			new_serial.custom_divisor != 0 ||
			new_serial.baud_base != 921600)
		return -EPERM;

	if (!capable(CAP_SYS_ADMIN)) {
		if (((new_serial.flags & ~ASYNC_USR_MASK) !=
		     (info->port.flags & ~ASYNC_USR_MASK)))
			return -EPERM;
	} else
		info->port.close_delay = new_serial.close_delay * HZ / 100;

	new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
	new_serial.flags |= (info->port.flags & ASYNC_FLAGS);

	MoxaSetFifo(info, new_serial.type == PORT_16550A);

	info->type = new_serial.type;
	return 0;
}



/*****************************************************************************
 *	Static local functions: 					     *
 *****************************************************************************/

static void MoxaSetFifo(struct moxa_port *port, int enable)
{
	void __iomem *ofsAddr = port->tableAddr;

	if (!enable) {
		moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
		moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
	} else {
		moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
		moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
	}
}