pal.c

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/*
 * UWB PAL support.
 *
 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/uwb.h>
#include <linux/export.h>

#include "uwb-internal.h"

void uwb_pal_init(struct uwb_pal *pal)
{
    INIT_LIST_HEAD(&pal->node);
}
EXPORT_SYMBOL_GPL(uwb_pal_init);

int uwb_pal_register(struct uwb_pal *pal)
{
    struct uwb_rc *rc = pal->rc;
    int ret;

    if (pal->device) {
        ret = sysfs_create_link(&pal->device->kobj,
                    &rc->uwb_dev.dev.kobj, "uwb_rc");
        if (ret < 0)
            return ret;
        ret = sysfs_create_link(&rc->uwb_dev.dev.kobj,
                    &pal->device->kobj, pal->name);
        if (ret < 0) {
            sysfs_remove_link(&pal->device->kobj, "uwb_rc");
            return ret;
        }
    }

    pal->debugfs_dir = uwb_dbg_create_pal_dir(pal);

    mutex_lock(&rc->uwb_dev.mutex);
    list_add(&pal->node, &rc->pals);
    mutex_unlock(&rc->uwb_dev.mutex);

    return 0;
}
EXPORT_SYMBOL_GPL(uwb_pal_register);

void uwb_pal_unregister(struct uwb_pal *pal)
{
    struct uwb_rc *rc = pal->rc;

    uwb_radio_stop(pal);

    mutex_lock(&rc->uwb_dev.mutex);
    list_del(&pal->node);
    mutex_unlock(&rc->uwb_dev.mutex);

    debugfs_remove(pal->debugfs_dir);

    if (pal->device) {
        sysfs_remove_link(&rc->uwb_dev.dev.kobj, pal->name);
        sysfs_remove_link(&pal->device->kobj, "uwb_rc");
    }
}
EXPORT_SYMBOL_GPL(uwb_pal_unregister);

void uwb_rc_pal_init(struct uwb_rc *rc)
{
    INIT_LIST_HEAD(&rc->pals);
}