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/**
* @file metempl_sub.c
*
* @brief Subdevice instance.
* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
* @author Guenter Gebhardt
*/
/*
* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
*
* This file 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.
*/
#ifndef __KERNEL__
# define __KERNEL__
#endif
/*
* Includes
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/types.h>
#include "medefines.h"
#include "meinternal.h"
#include "meerror.h"
#include "medebug.h"
#include "metempl_sub_reg.h"
#include "metempl_sub.h"
/*
* Defines
*/
/*
* Functions
*/
static void metempl_sub_destructor(struct me_subdevice *subdevice)
{
metempl_sub_subdevice_t *instance;
PDEBUG("executed.\n");
instance = (metempl_sub_subdevice_t *) subdevice;
/* Until there this was the things the default constructor does.
If you do not have any additional things to do you can wipe it out. */
me_subdevice_deinit(&instance->base);
kfree(instance);
}
static int metempl_sub_query_number_channels(me_subdevice_t * subdevice,
int *number)
{
PDEBUG("executed.\n");
*number = 0;
return ME_ERRNO_SUCCESS;
}
static int metempl_sub_query_subdevice_type(me_subdevice_t * subdevice,
int *type, int *subtype)
{
PDEBUG("executed.\n");
*type = 0;
*subtype = 0;
return ME_ERRNO_SUCCESS;
}
static int metempl_sub_query_subdevice_caps(me_subdevice_t * subdevice,
int *caps)
{
PDEBUG("executed.\n");
*caps = 0;
return ME_ERRNO_SUCCESS;
}
metempl_sub_subdevice_t *metempl_sub_constructor(uint32_t reg_base,
unsigned int sub_idx,
spinlock_t * ctrl_reg_lock)
{
metempl_sub_subdevice_t *subdevice;
int err;
PDEBUG("executed.\n");
/* Allocate memory for subdevice instance */
subdevice = kmalloc(sizeof(metempl_sub_subdevice_t), GFP_KERNEL);
if (!subdevice) {
PERROR("Cannot get memory for subdevice instance.\n");
return NULL;
}
memset(subdevice, 0, sizeof(metempl_sub_subdevice_t));
/* Check if subdevice index is out of range */
if (sub_idx >= 2) {
PERROR("Template subdevice index is out of range.\n");
kfree(subdevice);
return NULL;
}
/* Initialize subdevice base class */
err = me_subdevice_init(&subdevice->base);
if (err) {
PERROR("Cannot initialize subdevice base class instance.\n");
kfree(subdevice);
return NULL;
}
// Initialize spin locks.
spin_lock_init(&subdevice->subdevice_lock);
subdevice->ctrl_reg_lock = ctrl_reg_lock;
/* Save the subdevice index */
subdevice->sub_idx = sub_idx;
/* Override base class methods. */
subdevice->base.me_subdevice_destructor = metempl_sub_destructor;
subdevice->base.me_subdevice_query_number_channels =
metempl_sub_query_number_channels;
subdevice->base.me_subdevice_query_subdevice_type =
metempl_sub_query_subdevice_type;
subdevice->base.me_subdevice_query_subdevice_caps =
metempl_sub_query_subdevice_caps;
return subdevice;
}
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