/*
 * Dummy Zaptel Driver for Zapata Telephony interface
 *
 * Required: usb-uhci module and kernel > 2.4.4 OR kernel > 2.6.0
 *
 * Written by Robert Pleh <robert.pleh@hermes.si>
 * 2.6 version by Tony Hoyle
 * Unified by Mark Spencer <markster@digium.com>
 *
 * Copyright (C) 2002, Hermes Softlab
 * Copyright (C) 2004, Digium, Inc.
 *
 * All rights reserved.
 *
 * 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.
 *
 */

/*
 * This source works on only Kurouto-Shikou Kurobox.
 * Big Modification from original ztdymmy. DO NOT use for another platform.
 * For More information, http://voip.gapj.net
 *
*/

#include <linux/version.h>

#ifndef VERSION_CODE
#  define VERSION_CODE(vers,rel,seq) ( ((vers)<<16) | ((rel)<<8) | (seq) )
#endif


#if LINUX_VERSION_CODE < VERSION_CODE(2,4,5)
#  error "This kernel is too old: not supported by this file"
#endif

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include "zaptel.h"


#include <linux/usb.h>
#include <linux/pci.h>
#include <asm/io.h>

#ifndef LINUX_VERSION_CODE
#  include <linux/version.h>
#endif

#ifndef VERSION_CODE
#  define VERSION_CODE(vers,rel,seq) ( ((vers)<<16) | ((rel)<<8) | (seq) )
#endif


#if LINUX_VERSION_CODE < VERSION_CODE(2,4,5)
#  error "This kernel is too old: not supported by this file"
#endif

struct ztdummy {
        struct zt_span span;
        struct zt_chan chan;
};


static int cnt1;

static struct ztdummy *ztd;

static int debug = 0;

static struct timer_list timer;

static void ztdummy_timer(unsigned long param)
{
    for(cnt1=0;cnt1<10;cnt1++){
        zt_receive(&ztd->span);
        zt_transmit(&ztd->span);
    }
    timer.expires = jiffies + 1;
    add_timer(&timer);
}

static int ztdummy_initialize(struct ztdummy *ztd)
{
	/* Zapata stuff */
	sprintf(ztd->span.name, "ZTDUMMY/1");
	sprintf(ztd->span.desc, "%s %d", ztd->span.name, 1);
	sprintf(ztd->chan.name, "ZTDUMMY/%d/%d", 1, 0);
	ztd->chan.chanpos = 1;
	ztd->span.chans = &ztd->chan;
	ztd->span.channels = 0;		/* no channels on our span */
	ztd->span.deflaw = ZT_LAW_MULAW;
	init_waitqueue_head(&ztd->span.maintq);
	ztd->span.pvt = ztd;
	ztd->chan.pvt = ztd;
	if (zt_register(&ztd->span, 0)) {
		return -1;
	}
	return 0;
}

int init_module(void)
{
    ztd = kmalloc(sizeof(struct ztdummy), GFP_KERNEL);
    if (ztd == NULL) {
	    printk("ztdummy_kb: Unable to allocate memory\n");
	    return -ENOMEM;
    }

    memset(ztd, 0x0, sizeof(struct ztdummy));

    if (ztdummy_initialize(ztd)) {
	printk("ztdummy_kb: Unable to intialize zaptel driver\n");
	kfree(ztd);
	return -ENODEV;
    }

    init_timer(&timer);
    timer.function = ztdummy_timer;
    timer.expires = jiffies + 1;
    add_timer(&timer);

    if (debug)
        printk("ztdummy_kb: init() finished\n");
    return 0;
}


void cleanup_module(void)
{
    del_timer(&timer);
    zt_unregister(&ztd->span);
    kfree(ztd);
    if (debug)
        printk("ztdummy_kb: cleanup() finished\n");
}



MODULE_PARM(debug, "i");
/*MODULE_PARM(monitor, "i");*/
MODULE_DESCRIPTION("Dummy Zaptel Driver for kurobox");
MODULE_AUTHOR("Robert Pleh <robert.pleh@hermes.si> and mod by TT");
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif