path: root/drivers/net/wimax/i2400m/control.c

/*
 * Intel Wireless WiMAX Connection 2400m
 * Miscellaneous control functions for managing the device
 *
 *
 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * Intel Corporation <linux-wimax@intel.com>
 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
 *  - Initial implementation
 *
 * This is a collection of functions used to control the device (plus
 * a few helpers).
 *
 * There are utilities for handling TLV buffers, hooks on the device's
 * reports to act on device changes of state [i2400m_report_hook()],
 * on acks to commands [i2400m_msg_ack_hook()], a helper for sending
 * commands to the device and blocking until a reply arrives
 * [i2400m_msg_to_dev()], a few high level commands for manipulating
 * the device state, powersving mode and configuration plus the
 * routines to setup the device once communication is stablished with
 * it [i2400m_dev_initialize()].
 *
 * ROADMAP
 *
 * i2400m_dev_initalize()       Called by i2400m_dev_start()
 *   i2400m_set_init_config()
 *   i2400m_cmd_get_state()
 * i2400m_dev_shutdown()        Called by i2400m_dev_stop()
 *   i2400m_reset()
 *
 * i2400m_{cmd,get,set}_*()
 *   i2400m_msg_to_dev()
 *   i2400m_msg_check_status()
 *
 * i2400m_report_hook()         Called on reception of an event
 *   i2400m_report_state_hook()
 *     i2400m_tlv_buffer_walk()
 *     i2400m_tlv_match()
 *     i2400m_report_tlv_system_state()
 *     i2400m_report_tlv_rf_switches_status()
 *     i2400m_report_tlv_media_status()
 *   i2400m_cmd_enter_powersave()
 *
 * i2400m_msg_ack_hook()        Called on reception of a reply to a
 *                              command, get or set
 */

#include <stdarg.h>
#include "i2400m.h"
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/wimax/i2400m.h>


#define D_SUBMODULE control
#include "debug-levels.h"

static int i2400m_idle_mode_disabled;/* 0 (idle mode enabled) by default */
module_param_named(idle_mode_disabled, i2400m_idle_mode_disabled, int, 0644);
MODULE_PARM_DESC(idle_mode_disabled,
		 "If true, the device will not enable idle mode negotiation "
		 "with the base station (when connected) to save power.");

/* 0 (power saving enabled) by default */