[linux-2.6-block.git] / drivers / uwb / pal.c

/*
 * 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"

/**
 * uwb_pal_init - initialize a UWB PAL
 * @pal: the PAL to initialize
 */
void uwb_pal_init(struct uwb_pal *pal)
{
	INIT_LIST_HEAD(&pal->node);
}
EXPORT_SYMBOL_GPL(uwb_pal_init);

/**
 * uwb_pal_register - register a UWB PAL
 * @pal: the PAL
 *
 * The PAL must be initialized with 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);

/**
 * uwb_pal_register - unregister a UWB PAL
 * @pal: the PAL
 */
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);

/**
 * uwb_rc_pal_init - initialize the PAL related parts of a radio controller
 * @rc: the radio controller
 */
void uwb_rc_pal_init(struct uwb_rc *rc)
{
	INIT_LIST_HEAD(&rc->pals);
}
Commit	Line	Data
183b9b59 IPG	1	/*
	2	* UWB PAL support.
	3	*
	4	* Copyright (C) 2008 Cambridge Silicon Radio Ltd.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License version
	8	* 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18	#include <linux/kernel.h>
dcc7461e	19	#include <linux/debugfs.h>
183b9b59	20	#include <linux/uwb.h>
475c0a6b	21	#include <linux/export.h>
183b9b59 IPG	22
	23	#include "uwb-internal.h"
	24
	25	/**
	26	* uwb_pal_init - initialize a UWB PAL
	27	* @pal: the PAL to initialize
	28	*/
	29	void uwb_pal_init(struct uwb_pal *pal)
	30	{
	31	INIT_LIST_HEAD(&pal->node);
	32	}
	33	EXPORT_SYMBOL_GPL(uwb_pal_init);
	34
	35	/**
	36	* uwb_pal_register - register a UWB PAL
183b9b59 IPG	37	* @pal: the PAL
	38	*
	39	* The PAL must be initialized with uwb_pal_init().
	40	*/
6fae35f9	41	int uwb_pal_register(struct uwb_pal *pal)
183b9b59	42	{
6fae35f9	43	struct uwb_rc *rc = pal->rc;
b60066c1 DV	44	int ret;
	45
	46	if (pal->device) {
	47	ret = sysfs_create_link(&pal->device->kobj,
	48	&rc->uwb_dev.dev.kobj, "uwb_rc");
	49	if (ret < 0)
	50	return ret;
	51	ret = sysfs_create_link(&rc->uwb_dev.dev.kobj,
	52	&pal->device->kobj, pal->name);
	53	if (ret < 0) {
	54	sysfs_remove_link(&pal->device->kobj, "uwb_rc");
	55	return ret;
	56	}
	57	}
	58
dcc7461e DV	59	pal->debugfs_dir = uwb_dbg_create_pal_dir(pal);
dcc7461e DV	60
6fae35f9	61	mutex_lock(&rc->uwb_dev.mutex);
183b9b59	62	list_add(&pal->node, &rc->pals);
6fae35f9	63	mutex_unlock(&rc->uwb_dev.mutex);
183b9b59 IPG	64
	65	return 0;
	66	}
	67	EXPORT_SYMBOL_GPL(uwb_pal_register);
	68
	69	/**
	70	* uwb_pal_register - unregister a UWB PAL
183b9b59 IPG	71	* @pal: the PAL
183b9b59 IPG	72	*/
6fae35f9	73	void uwb_pal_unregister(struct uwb_pal *pal)
183b9b59	74	{
6fae35f9 DV	75	struct uwb_rc *rc = pal->rc;
	76
	77	uwb_radio_stop(pal);
	78
	79	mutex_lock(&rc->uwb_dev.mutex);
183b9b59	80	list_del(&pal->node);
6fae35f9	81	mutex_unlock(&rc->uwb_dev.mutex);
b60066c1	82
dcc7461e DV	83	debugfs_remove(pal->debugfs_dir);
dcc7461e DV	84
b60066c1 DV	85	if (pal->device) {
	86	sysfs_remove_link(&rc->uwb_dev.dev.kobj, pal->name);
	87	sysfs_remove_link(&pal->device->kobj, "uwb_rc");
	88	}
183b9b59 IPG	89	}
	90	EXPORT_SYMBOL_GPL(uwb_pal_unregister);
	91
	92	/**
	93	* uwb_rc_pal_init - initialize the PAL related parts of a radio controller
	94	* @rc: the radio controller
	95	*/
	96	void uwb_rc_pal_init(struct uwb_rc *rc)
	97	{
183b9b59 IPG	98	INIT_LIST_HEAD(&rc->pals);
183b9b59 IPG	99	}