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/*
* Copyright (C) 2010 Bruno Randolf <br1@einfach.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef ANI_H
#define ANI_H
#include "../ath.h"
enum ath5k_phy_error_code;
/* these thresholds are relative to the ATH5K_ANI_LISTEN_PERIOD */
#define ATH5K_ANI_LISTEN_PERIOD 100
#define ATH5K_ANI_OFDM_TRIG_HIGH 500
#define ATH5K_ANI_OFDM_TRIG_LOW 200
#define ATH5K_ANI_CCK_TRIG_HIGH 200
#define ATH5K_ANI_CCK_TRIG_LOW 100
/* average beacon RSSI thresholds */
#define ATH5K_ANI_RSSI_THR_HIGH 40
#define ATH5K_ANI_RSSI_THR_LOW 7
/* maximum available levels */
#define ATH5K_ANI_MAX_FIRSTEP_LVL 2
#define ATH5K_ANI_MAX_NOISE_IMM_LVL 1
/**
* enum ath5k_ani_mode - mode for ANI / noise sensitivity
*
* @ATH5K_ANI_MODE_OFF: Turn ANI off. This can be useful to just stop the ANI
* algorithm after it has been on auto mode.
* @ATH5K_ANI_MODE_MANUAL_LOW: Manually set all immunity parameters to low,
* maximizing sensitivity. ANI will not run.
* @ATH5K_ANI_MODE_MANUAL_HIGH: Manually set all immunity parameters to high,
* minimizing sensitivity. ANI will not run.
* @ATH5K_ANI_MODE_AUTO: Automatically control immunity parameters based on the
* amount of OFDM and CCK frame errors (default).
*/
enum ath5k_ani_mode {
ATH5K_ANI_MODE_OFF = 0,
ATH5K_ANI_MODE_MANUAL_LOW = 1,
ATH5K_ANI_MODE_MANUAL_HIGH = 2,
ATH5K_ANI_MODE_AUTO = 3
};
/**
* struct ath5k_ani_state - ANI state and associated counters
* @ani_mode: One of enum ath5k_ani_mode
* @noise_imm_level: Noise immunity level
* @spur_level: Spur immunity level
* @firstep_level: FIRstep level
* @ofdm_weak_sig: OFDM weak signal detection state (on/off)
* @cck_weak_sig: CCK weak signal detection state (on/off)
* @max_spur_level: Max spur immunity level (chip specific)
* @listen_time: Listen time
* @ofdm_errors: OFDM timing error count
* @cck_errors: CCK timing error count
* @last_cc: The &struct ath_cycle_counters (for stats)
* @last_listen: Listen time from previous run (for stats)
* @last_ofdm_errors: OFDM timing error count from previous run (for tats)
* @last_cck_errors: CCK timing error count from previous run (for stats)
* @sum_ofdm_errors: Sum of OFDM timing errors (for stats)
* @sum_cck_errors: Sum of all CCK timing errors (for stats)
*/
struct ath5k_ani_state {
enum ath5k_ani_mode ani_mode;
/* state */
int noise_imm_level;
int spur_level;
int firstep_level;
bool ofdm_weak_sig;
bool cck_weak_sig;
int max_spur_level;
/* used by the algorithm */
unsigned int listen_time;
unsigned int ofdm_errors;
unsigned int cck_errors;
/* debug/statistics only: numbers from last ANI calibration */
struct ath_cycle_counters last_cc;
unsigned int last_listen;
unsigned int last_ofdm_errors;
unsigned int last_cck_errors;
unsigned int sum_ofdm_errors;
unsigned int sum_cck_errors;
};
void ath5k_ani_init(struct ath5k_hw *ah, enum ath5k_ani_mode mode);
void ath5k_ani_mib_intr(struct ath5k_hw *ah);
void ath5k_ani_calibration(struct ath5k_hw *ah);
void ath5k_ani_phy_error_report(struct ath5k_hw *ah,
enum ath5k_phy_error_code phyerr);
/* for manual control */
void ath5k_ani_set_noise_immunity_level(struct ath5k_hw *ah, int level);
void ath5k_ani_set_spur_immunity_level(struct ath5k_hw *ah, int level);
void ath5k_ani_set_firstep_level(struct ath5k_hw *ah, int level);
void ath5k_ani_set_ofdm_weak_signal_detection(struct ath5k_hw *ah, bool on);
void ath5k_ani_set_cck_weak_signal_detection(struct ath5k_hw *ah, bool on);
void ath5k_ani_print_counters(struct ath5k_hw *ah);
#endif /* ANI_H */
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