451084d2e0
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/**
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* @file metempl_sub.c
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*
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* @brief Subdevice instance.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __KERNEL__
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# define __KERNEL__
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#endif
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/*
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* Includes
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include "medefines.h"
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#include "meinternal.h"
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#include "meerror.h"
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#include "medebug.h"
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#include "metempl_sub_reg.h"
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#include "metempl_sub.h"
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/*
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* Defines
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*/
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/*
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* Functions
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*/
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static void metempl_sub_destructor(struct me_subdevice *subdevice)
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{
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metempl_sub_subdevice_t *instance;
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PDEBUG("executed.\n");
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instance = (metempl_sub_subdevice_t *) subdevice;
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/* Until there this was the things the default constructor does.
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If you do not have any additional things to do you can wipe it out. */
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me_subdevice_deinit(&instance->base);
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kfree(instance);
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}
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static int metempl_sub_query_number_channels(me_subdevice_t *subdevice,
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int *number)
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{
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PDEBUG("executed.\n");
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*number = 0;
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return ME_ERRNO_SUCCESS;
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}
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static int metempl_sub_query_subdevice_type(me_subdevice_t *subdevice,
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int *type, int *subtype)
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{
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PDEBUG("executed.\n");
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*type = 0;
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*subtype = 0;
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return ME_ERRNO_SUCCESS;
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}
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static int metempl_sub_query_subdevice_caps(me_subdevice_t *subdevice,
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int *caps)
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{
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PDEBUG("executed.\n");
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*caps = 0;
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return ME_ERRNO_SUCCESS;
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}
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metempl_sub_subdevice_t *metempl_sub_constructor(uint32_t reg_base,
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unsigned int sub_idx,
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spinlock_t *ctrl_reg_lock)
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{
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metempl_sub_subdevice_t *subdevice;
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int err;
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PDEBUG("executed.\n");
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/* Allocate memory for subdevice instance */
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subdevice = kmalloc(sizeof(metempl_sub_subdevice_t), GFP_KERNEL);
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if (!subdevice) {
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PERROR("Cannot get memory for subdevice instance.\n");
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return NULL;
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}
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memset(subdevice, 0, sizeof(metempl_sub_subdevice_t));
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/* Check if subdevice index is out of range */
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if (sub_idx >= 2) {
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PERROR("Template subdevice index is out of range.\n");
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kfree(subdevice);
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return NULL;
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}
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/* Initialize subdevice base class */
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err = me_subdevice_init(&subdevice->base);
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if (err) {
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PERROR("Cannot initialize subdevice base class instance.\n");
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kfree(subdevice);
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return NULL;
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}
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// Initialize spin locks.
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spin_lock_init(&subdevice->subdevice_lock);
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subdevice->ctrl_reg_lock = ctrl_reg_lock;
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/* Save the subdevice index */
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subdevice->sub_idx = sub_idx;
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/* Override base class methods. */
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subdevice->base.me_subdevice_destructor = metempl_sub_destructor;
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subdevice->base.me_subdevice_query_number_channels =
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metempl_sub_query_number_channels;
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subdevice->base.me_subdevice_query_subdevice_type =
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metempl_sub_query_subdevice_type;
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subdevice->base.me_subdevice_query_subdevice_caps =
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metempl_sub_query_subdevice_caps;
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return subdevice;
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}
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