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/*
* 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.
*
*/
#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>
#ifdef STANDALONE_ZAPATA
#include "zaptel.h"
#else
#include <linux/zaptel.h>
#endif
#ifndef LINUX26
#include <linux/usb.h>
#include <linux/pci.h>
#include <asm/io.h>
#endif
#ifdef LINUX26
#include <linux/moduleparam.h>
#endif
#include "ztdummy.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
static struct ztdummy *ztd;
static int debug = 0;
#ifdef LINUX26
/* New 2.6 kernel timer stuff */
static struct timer_list timer;
#else
#if LINUX_VERSION_CODE < VERSION_CODE(2,4,5)
# error "This kernel is too old: not supported by this file"
#endif
/* Old UCHI stuff */
static uhci_desc_t *td;
static uhci_t *s;
static int check_int = 0;
static int monitor = 0;
/* exported kernel symbols */
extern int insert_td (uhci_t *s, uhci_desc_t *qh, uhci_desc_t* new, int flags);
extern int alloc_td (uhci_t *s, uhci_desc_t ** new, int flags);
extern int insert_td_horizontal (uhci_t *s, uhci_desc_t *td, uhci_desc_t* new);
extern int unlink_td (uhci_t *s, uhci_desc_t *element, int phys_unlink);
extern void fill_td (uhci_desc_t *td, int status, int info, __u32 buffer);
extern void uhci_interrupt (int irq, void *__uhci, struct pt_regs *regs);
extern int delete_desc (uhci_t *s, uhci_desc_t *element);
extern uhci_t **uhci_devices;
#endif
#ifdef LINUX26
static void ztdummy_timer(unsigned long param)
{
zt_receive(&ztd->span);
zt_transmit(&ztd->span);
timer.expires = jiffies + 1;
add_timer(&timer);
}
#else
static void ztdummy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned short status;
unsigned int io_addr = s->io_addr;
status = inw (io_addr + USBSTS);
if (status != 0) { /* interrupt from our USB port */
zt_receive(&ztd->span);
zt_transmit(&ztd->span);
if (monitor && (check_int==0)) { /* for testing if interrupt gets triggered*/
check_int = 1;
printk("ztdummy: interrupt triggered \n");
}
}
return;
}
#endif
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)
{
#ifndef LINUX26
int irq;
#ifdef DEFINE_SPINLOCK
DEFINE_SPINLOCK(mylock);
#else
spinlock_t mylock = SPIN_LOCK_UNLOCKED;
#endif
if (uhci_devices==NULL){
printk ("ztdummy: Uhci_devices pointer error.\n");
return -ENODEV;
}
s=*uhci_devices; /* uhci device */
if (s==NULL){
printk ("ztdummy: No uhci_device found.\n");
return -ENODEV;
}
#endif
ztd = kmalloc(sizeof(struct ztdummy), GFP_KERNEL);
if (ztd == NULL) {
printk("ztdummy: Unable to allocate memory\n");
return -ENOMEM;
}
memset(ztd, 0x0, sizeof(struct ztdummy));
if (ztdummy_initialize(ztd)) {
printk("ztdummy: Unable to intialize zaptel driver\n");
kfree(ztd);
return -ENODEV;
}
#ifdef LINUX26
init_timer(&timer);
timer.function = ztdummy_timer;
timer.expires = jiffies + 1;
add_timer(&timer);
#else
irq=s->irq;
spin_lock_irq(&mylock);
free_irq(s->irq, s); /* remove uhci_interrupt temporaly */
if (request_irq (irq, ztdummy_interrupt, SA_SHIRQ, "ztdummy", ztd)) {
spin_unlock_irq(&mylock);
err("Our request_irq %d failed!",irq);
kfree(ztd);
return -EIO;
} /* we add our handler first, to assure, that our handler gets called first */
if (request_irq (irq, uhci_interrupt, SA_SHIRQ, s->uhci_pci->driver->name, s)) {
spin_unlock_irq(&mylock);
err("Original request_irq %d failed!",irq);
}
spin_unlock_irq(&mylock);
/* add td to usb host controller interrupt queue */
alloc_td(s, &td, 0);
fill_td(td, TD_CTRL_IOC, 0, 0);
insert_td_horizontal(s, s->int_chain[0], td); /* use int_chain[0] to get 1ms interrupts */
#endif
if (debug)
printk("ztdummy: init() finished\n");
return 0;
}
void cleanup_module(void)
{
#ifdef LINUX26
del_timer(&timer);
#else
free_irq(s->irq, ztd); /* disable interrupts */
#endif
zt_unregister(&ztd->span);
kfree(ztd);
#ifndef LINUX26
unlink_td(s, td, 1);
delete_desc(s, td);
#endif
if (debug)
printk("ztdummy: cleanup() finished\n");
}
#ifdef LINUX26
module_param(debug, int, 0600);
#else
MODULE_PARM(debug, "i");
#endif
#ifndef LINUX26
MODULE_PARM(monitor, "i");
#endif
MODULE_DESCRIPTION("Dummy Zaptel Driver");
MODULE_AUTHOR("Robert Pleh <robert.pleh@hermes.si>");
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
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