release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/wireless/ath/ath5k/ani.h

   1 /*
   2  * Copyright (C) 2010 Bruno Randolf <br1@einfach.org>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #ifndef ANI_H
  17 #define ANI_H
  18
  19 /* these thresholds are relative to the ATH5K_ANI_LISTEN_PERIOD */
  20 #define ATH5K_ANI_LISTEN_PERIOD         100
  21 #define ATH5K_ANI_OFDM_TRIG_HIGH        500
  22 #define ATH5K_ANI_OFDM_TRIG_LOW         200
  23 #define ATH5K_ANI_CCK_TRIG_HIGH         200
  24 #define ATH5K_ANI_CCK_TRIG_LOW          100
  25
  26 /* average beacon RSSI thresholds */
  27 #define ATH5K_ANI_RSSI_THR_HIGH         40
  28 #define ATH5K_ANI_RSSI_THR_LOW          7
  29
  30 /* maximum availabe levels */
  31 #define ATH5K_ANI_MAX_FIRSTEP_LVL       2
  32 #define ATH5K_ANI_MAX_NOISE_IMM_LVL     1
  33
  34
  35 /**
  36  * enum ath5k_ani_mode - mode for ANI / noise sensitivity
  37  *
  38  * @ATH5K_ANI_MODE_OFF: Turn ANI off. This can be useful to just stop the ANI
  39  *      algorithm after it has been on auto mode.
  40  * ATH5K_ANI_MODE_MANUAL_LOW: Manually set all immunity parameters to low,
  41  *      maximizing sensitivity. ANI will not run.
  42  * ATH5K_ANI_MODE_MANUAL_HIGH: Manually set all immunity parameters to high,
  43  *      minimizing sensitivity. ANI will not run.
  44  * ATH5K_ANI_MODE_AUTO: Automatically control immunity parameters based on the
  45  *      amount of OFDM and CCK frame errors (default).
  46  */
  47 enum ath5k_ani_mode {
  48         ATH5K_ANI_MODE_OFF              = 0,
  49         ATH5K_ANI_MODE_MANUAL_LOW       = 1,
  50         ATH5K_ANI_MODE_MANUAL_HIGH      = 2,
  51         ATH5K_ANI_MODE_AUTO             = 3
  52 };
  53
  54
  55 /**
  56  * struct ath5k_ani_state - ANI state and associated counters
  57  *
  58  * @max_spur_level: the maximum spur level is chip dependent
  59  */
  60 struct ath5k_ani_state {
  61         enum ath5k_ani_mode     ani_mode;
  62
  63         /* state */
  64         int                     noise_imm_level;
  65         int                     spur_level;
  66         int                     firstep_level;
  67         bool                    ofdm_weak_sig;
  68         bool                    cck_weak_sig;
  69
  70         int                     max_spur_level;
  71
  72         /* used by the algorithm */
  73         unsigned int            listen_time;
  74         unsigned int            ofdm_errors;
  75         unsigned int            cck_errors;
  76
  77         /* debug/statistics only: numbers from last ANI calibration */
  78         unsigned int            pfc_tx;
  79         unsigned int            pfc_rx;
  80         unsigned int            pfc_busy;
  81         unsigned int            pfc_cycles;
  82         unsigned int            last_listen;
  83         unsigned int            last_ofdm_errors;
  84         unsigned int            last_cck_errors;
  85         unsigned int            sum_ofdm_errors;
  86         unsigned int            sum_cck_errors;
  87 };
  88
  89 void ath5k_ani_init(struct ath5k_hw *ah, enum ath5k_ani_mode mode);
  90 void ath5k_ani_mib_intr(struct ath5k_hw *ah);
  91 void ath5k_ani_calibration(struct ath5k_hw *ah);
  92 void ath5k_ani_phy_error_report(struct ath5k_hw *ah,
  93                                 enum ath5k_phy_error_code phyerr);
  94
  95 /* for manual control */
  96 void ath5k_ani_set_noise_immunity_level(struct ath5k_hw *ah, int level);
  97 void ath5k_ani_set_spur_immunity_level(struct ath5k_hw *ah, int level);
  98 void ath5k_ani_set_firstep_level(struct ath5k_hw *ah, int level);
  99 void ath5k_ani_set_ofdm_weak_signal_detection(struct ath5k_hw *ah, bool on);
 100 void ath5k_ani_set_cck_weak_signal_detection(struct ath5k_hw *ah, bool on);
 101
 102 void ath5k_ani_print_counters(struct ath5k_hw *ah);
 103
 104 #endif /* ANI_H */