/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * Contact Information: * Intel Linux Wireless <[email protected]> * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. * 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 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. *****************************************************************************/ #include <linux/slab.h> #include <net/mac80211.h> #include "common.h" #include "4965.h" /***************************************************************************** * INIT calibrations framework *****************************************************************************/ struct stats_general_data { … }; /***************************************************************************** * RUNTIME calibrations framework *****************************************************************************/ /* "false alarms" are signals that our DSP tries to lock onto, * but then determines that they are either noise, or transmissions * from a distant wireless network (also "noise", really) that get * "stepped on" by stronger transmissions within our own network. * This algorithm attempts to set a sensitivity level that is high * enough to receive all of our own network traffic, but not so * high that our DSP gets too busy trying to lock onto non-network * activity/noise. */ static int il4965_sens_energy_cck(struct il_priv *il, u32 norm_fa, u32 rx_enable_time, struct stats_general_data *rx_info) { … } static int il4965_sens_auto_corr_ofdm(struct il_priv *il, u32 norm_fa, u32 rx_enable_time) { … } static void il4965_prepare_legacy_sensitivity_tbl(struct il_priv *il, struct il_sensitivity_data *data, __le16 *tbl) { … } /* Prepare a C_SENSITIVITY, send to uCode if values have changed */ static int il4965_sensitivity_write(struct il_priv *il) { … } void il4965_init_sensitivity(struct il_priv *il) { … } void il4965_sensitivity_calibration(struct il_priv *il, void *resp) { … } static inline u8 il4965_find_first_chain(u8 mask) { … } /* * Run disconnected antenna algorithm to find out which antennas are * disconnected. */ static void il4965_find_disconn_antenna(struct il_priv *il, u32 * average_sig, struct il_chain_noise_data *data) { … } static void il4965_gain_computation(struct il_priv *il, u32 * average_noise, u16 min_average_noise_antenna_i, u32 min_average_noise, u8 default_chain) { … } /* * Accumulate 16 beacons of signal and noise stats for each of * 3 receivers/antennas/rx-chains, then figure out: * 1) Which antennas are connected. * 2) Differential rx gain settings to balance the 3 receivers. */ void il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp) { … } void il4965_reset_run_time_calib(struct il_priv *il) { … }
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