/*
* 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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