path: root/drivers/net/wireless/rt2x00/rt2x00dev.c

/*
	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	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.

	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.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00lib
	Abstract: rt2x00 generic device routines.
 */

/*
 * Set enviroment defines for rt2x00.h
 */
#define DRV_NAME "rt2x00lib"

#include <linux/kernel.h>
#include <linux/module.h>

#include "rt2x00.h"
#include "rt2x00lib.h"

/*
 * Ring handler.
 */
struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
				     const unsigned int queue)
{
	int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);

	/*
	 * Check if we are requesting a reqular TX ring,
	 * or if we are requesting a Beacon or Atim ring.
	 * For Atim rings, we should check if it is supported.
	 */
	if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
		return &rt2x00dev->tx[queue];

	if (!rt2x00dev->bcn || !beacon)
		return NULL;

	if (queue == IEEE80211_TX_QUEUE_BEACON)
		return &rt2x00dev->bcn[0];
	else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
		return &rt2x00dev->bcn[1];

	return NULL;
}
EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);

/*
 * Link tuning handlers
 */
static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
{
	rt2x00_clear_link(&rt2x00dev->link);

	/*
	 * Reset the link tuner.
	 */
	rt2x00dev->ops->lib->reset_tuner(rt2x00dev);

	queue_delayed_work(rt2x00dev->hw->workqueue,
			   &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
}

static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
{
	cancel_delayed_work_sync(&rt2x00dev->link.work);
}

void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
{
	rt2x00lib_stop_link_tuner(rt2x00dev);
	rt2x00lib_start_link_tuner(rt2x00dev);
}

/*
 * Radio control handlers.
 */
int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
{
	int status;

	/*
	 * Don't enable the radio twice.
	 * And check if the hardware button has been disabled.
	 */
	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
	    (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) &&
	     !test_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags)))
		return 0;

	/*
	 * Enable radio.
	 */
	status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
						       STATE_RADIO_ON);
	if (status)
		return status;

	__set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);

	/*
	 * Enable RX.
	 */
	rt2x00lib_toggle_rx(rt2x00dev, 1);

	/*
	 * Start the TX queues.
	 */
	ieee80211_start_queues(rt2x00dev->hw);

	return 0;
}

void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
{
	if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
		return;

	/*
	 * Stop all scheduled work.
	 */
	if (work_pending(&rt2x00dev->beacon_work))
		cancel_work_sync(&rt2x00dev->beacon_work);
	if (work_pending(&rt2x00dev->filter_work))
		cancel_work_sync(&rt2x00dev->filter_work);

	/*
	 * Stop the TX queues.
	 */
	ieee80211_stop_queues(rt2x00dev->hw);

	/*
	 * Disable RX.
	 */
	rt2x00lib_toggle_rx</