/*****************************************************************************
* sdla_ec_dev.c
*
* 		WANPIPE(tm) EC Device
*
* Authors: 	Nenad Corbic <ncorbic@sangoma.com>
*
* Copyright:	(c) 2003-2006 Sangoma Technologies Inc.
*
*		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.
* ============================================================================
* Jan 16, 2006	Nenad Corbic	Initial version.
*****************************************************************************/



#include "wanpipe_includes.h"
#include "wanpipe_defines.h"
#include "wanpipe_debug.h"
#include "wanpipe.h"
#if defined(__LINUX__)
# include "if_wanpipe.h"
#endif

#include "oct6100_api.h"
#include "oct6100_version.h"

#include "wanec_iface.h"
#include "wanec_iface_api.h"

#if !defined(__WINDOWS__)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
# define WP_ECDEV_UDEV 1
# undef WP_CONFIG_DEVFS_FS
#else
# undef WP_ECDEV_UDEV
# ifdef CONFIG_DEVFS_FS
#  include <linux/devfs_fs_kernel.h>
#  define WP_CONFIG_DEVFS_FS
# else
#  undef WP_CONFIG_DEVFS_FS
#  warning "Error: Hardware EC Device requires DEVFS: HWEC Will not be supported!"
# endif
#endif

#ifdef WP_CONFIG_DEVFS_FS
#define WP_ECDEV_MAJOR 242
#endif
#define WANEC_DEV_MAX_MINORS 256

#ifdef WP_ECDEV_UDEV

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
#define class_device_destroy device_destroy
#define WP_CLASS_DEV_CREATE(class, devt, device, priv_data, name) \
        device_create_drvdata(class, device, devt, priv_data, name)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
#define WP_CLASS_DEV_CREATE(class, devt, device, priv_data, name) \
        class_device_create(class, NULL, devt, device, name)
#else
#define WP_CLASS_DEV_CREATE(class, devt, device, priv_data, name) \
        class_device_create(class, devt, device, name)
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
static struct class *wanec_dev_class = NULL;
static struct cdev wanec_cdev = {
#ifndef LINUX_FEAT_2624
	.kobj	=	{.name = "wp_ec", },
#endif
	.owner	=	THIS_MODULE,
};
static dev_t wanec_dev = 0;
#else
static struct class_simple *wanec_dev_class = NULL;
#define class_create class_simple_create
#define class_destroy class_simple_destroy
#define class_device_create class_simple_device_add
#define class_device_destroy(a, b) class_simple_device_remove(b)
#endif

#endif

#define	UNIT(file) MINOR(file->f_dentry->d_inode->i_rdev)

#define WP_ECDEV_MAX_CHIPS 255

#ifdef WP_CONFIG_DEVFS_FS
devfs_handle_t devfs_handle;
#endif

#endif/*#if !defined(__WINDOWS__)*/


static int wanec_dev_open(struct inode*, struct file*);
static int wanec_dev_release(struct inode*, struct file*);

#if defined(__WINDOWS__)
int wanec_dev_ioctl(void *data, char *card_devname);
#else
static WAN_IOCTL_RET_TYPE WANDEF_IOCTL_FUNC(wanec_dev_ioctl, struct file*, unsigned int, unsigned long);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
static long wanec_dev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long data);
#endif

#endif



#if !defined(__WINDOWS__)
/*==============================================================
  Global Variables
 */
static struct file_operations wanec_dev_fops = {
	owner: THIS_MODULE,
	llseek: NULL,
	open: wanec_dev_open,
	release: wanec_dev_release,
	WAN_IOCTL: wanec_dev_ioctl,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
    compat_ioctl: wanec_dev_compat_ioctl,
#endif
	read: NULL,
	write: NULL,
	poll: NULL,
	mmap: NULL,
	flush: NULL,
	fsync: NULL,
	fasync: NULL,
};

int wanec_create_dev(void)
{
	int err;

	DEBUG_EVENT("%s: Registering Wanpipe ECDEV Device!\n",__FUNCTION__);
#ifdef WP_ECDEV_UDEV
	wanec_dev_class = class_create(THIS_MODULE, "wp_ec");
#endif

#ifdef WP_CONFIG_DEVFS_FS
	err=devfs_register_chrdev(WP_ECDEV_MAJOR, "wp_ec", &wanec_dev_fops);
	if (err) {
              	DEBUG_EVENT("Unable to register tor device on %d\n", WP_ECDEV_MAJOR);
	    	return err;
	}
#else
	if ((err=alloc_chrdev_region(&wanec_dev, 0, WANEC_DEV_MAX_MINORS, "wp_ec"))) {
		DEBUG_EVENT("Unable to alloc chrdev region for wanpipe ec device with %d minors\n", WANEC_DEV_MAX_MINORS);
		return err;
	}
	cdev_init(&wanec_cdev, &wanec_dev_fops);
	if (cdev_add(&wanec_cdev, wanec_dev, WANEC_DEV_MAX_MINORS)) {
		kobject_put(&wanec_cdev.kobj);
		unregister_chrdev_region(wanec_dev, WANEC_DEV_MAX_MINORS);
		DEBUG_ERROR("%s(): Error wanec cdev_add!\n",__FUNCTION__);
		return -EINVAL;
	}
#endif

#ifdef WP_ECDEV_UDEV
	WP_CLASS_DEV_CREATE(	wanec_dev_class,
				MKDEV(MAJOR(wanec_dev), 0),
				NULL,NULL,
				WANEC_DEV_NAME);
#endif

#ifdef WP_CONFIG_DEVFS_FS
	{
	umode_t mode = S_IFCHR|S_IRUGO|S_IWUGO;
	devfs_handle = devfs_register(NULL, WANEC_DEV_NAME, DEVFS_FL_DEFAULT, WP_ECDEV_MAJOR,
			       0, mode, &wanec_dev_fops, NULL);
	}
#endif

	return err;
}

int wanec_remove_dev(void)
{
	DEBUG_EVENT("%s: Unregistering Wanpipe ECDEV Device!\n",__FUNCTION__);

#ifdef WP_ECDEV_UDEV
	class_device_destroy(	wanec_dev_class,
				MKDEV(MAJOR(wanec_dev), 0));
#endif

#ifdef WP_CONFIG_DEVFS_FS
	devfs_unregister(devfs_handle);
#endif

#ifdef WP_ECDEV_UDEV
	class_destroy(wanec_dev_class);
#endif

#ifdef WP_CONFIG_DEVFS_FS
        devfs_unregister_chrdev(WP_ECDEV_MAJOR, "wp_ec");
#else
	cdev_del(&wanec_cdev);
	unregister_chrdev_region(wanec_dev, WANEC_DEV_MAX_MINORS);
#endif
	return 0;
}

#else/*#if !defined(__WINDOWS__)*/

int wanec_create_dev(void)
{
	int err = 0;
	DEBUG_EVENT("%s(): Registering Wanpipe ECDEV Device!\n",__FUNCTION__);
	return err;
}

int wanec_remove_dev(void)
{
	DEBUG_EVENT("%s(): Unregistering Wanpipe ECDEV Device!\n",__FUNCTION__);
	return 0;
}
#endif/*#if !defined(__WINDOWS__)*/

static int wanec_dev_open(struct inode *inode, struct file *file)
{
	DEBUG_TEST ("%s: DRIVER OPEN EC DEV\n", __FUNCTION__);
	return 0;
}


static int wanec_dev_release(struct inode *inode, struct file *file)
{
	DEBUG_TEST ("%s: DRIVER CLOSE EC DEV\n", __FUNCTION__);
	return 0;
}

#if defined(__WINDOWS__)
extern int wanec_ioctl(void*);
int wanec_dev_ioctl(void *data, char *card_devname)
{
	int rc;
	wan_ec_api_t *ec_api;
	char original_ec_api_dev_name[WAN_DRVNAME_SZ];

	if (data == 0){
		DEBUG_ERROR("%s(): Error: data pointer is NULL!\n",__FUNCTION__);
		return EINVAL;
	}
	
	ec_api = (wan_ec_api_t*)data;
#if 0
	DbgPrint("%s(): card_devname: %s, ec_api->devname: %s", 
		__FUNCTION__, card_devname, ec_api->devname);
#endif
	/* keep the original name which was set in user mode */
	snprintf(original_ec_api_dev_name, WAN_DRVNAME_SZ, "%s", ec_api->devname);

	/*	In user mode the 'ec_api->devname' is set to interface name.
		For example "wanpipe2_if0". But wanec code needs 'card name',
		("wanpipe2") not 'interface name' when the wanec_search() is called.
		Change 'ec_api->devname' to be the 'card name': */
	snprintf(ec_api->devname, WAN_DRVNAME_SZ, "%s", card_devname);

	rc = wanec_ioctl(data);

	/* restore the original name which was set in user mode */
	snprintf(ec_api->devname, WAN_DRVNAME_SZ, "%s", original_ec_api_dev_name);

	return rc;
}
#else
extern WAN_IOCTL_RET_TYPE wanec_ioctl(unsigned int, void*);
static WAN_IOCTL_RET_TYPE WANDEF_IOCTL_FUNC(wanec_dev_ioctl, struct file *file, unsigned int cmd, unsigned long data)
{
	long ret;
	if (data == 0){
		return -EINVAL;
	}

#ifdef HAVE_UNLOCKED_IOCTL
	ret = wanec_ioctl(cmd,(void*)data);
	return ret;
#else
	return wanec_ioctl(cmd,(void*)data);
#endif
}


#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
static long wanec_dev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long data)
{
#ifdef HAVE_UNLOCKED_IOCTL
    long err = (long) wanec_dev_ioctl(file, cmd, data);
#else
    long err = (long) wanec_dev_ioctl(NULL, file, cmd, data);
#endif
    return err;
}
#endif


#endif
