1/*
2 * Copyright (c) 2008-2011 Atheros Communications Inc.
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
17#ifndef CALIB_H
18#define CALIB_H
19
20#include "hw.h"
21
22#define AR_PHY_CCA_FILTERWINDOW_LENGTH 5
23
24/* Internal noise floor can vary by about 6db depending on the frequency */
25#define ATH9K_NF_CAL_NOISE_THRESH 6
26
27#define NUM_NF_READINGS 6
28#define ATH9K_NF_CAL_HIST_MAX 5
29
30struct ar5416IniArray {
31 u32 *ia_array;
32 u32 ia_rows;
33 u32 ia_columns;
34};
35
36#define STATIC_INI_ARRAY(array) { \
37 .ia_array = (u32 *)(array), \
38 .ia_rows = ARRAY_SIZE(array), \
39 .ia_columns = ARRAY_SIZE(array[0]), \
40 }
41
42#define INIT_INI_ARRAY(iniarray, array) do { \
43 (iniarray)->ia_array = (u32 *)(array); \
44 (iniarray)->ia_rows = ARRAY_SIZE(array); \
45 (iniarray)->ia_columns = ARRAY_SIZE(array[0]); \
46 } while (0)
47
48#define INI_RA(iniarray, row, column) \
49 (((iniarray)->ia_array)[(row) * ((iniarray)->ia_columns) + (column)])
50
51#define INIT_CAL(_perCal) do { \
52 (_perCal)->calState = CAL_WAITING; \
53 (_perCal)->calNext = NULL; \
54 } while (0)
55
56#define INSERT_CAL(_ahp, _perCal) \
57 do { \
58 if ((_ahp)->cal_list_last == NULL) { \
59 (_ahp)->cal_list = \
60 (_ahp)->cal_list_last = (_perCal); \
61 ((_ahp)->cal_list_last)->calNext = (_perCal); \
62 } else { \
63 ((_ahp)->cal_list_last)->calNext = (_perCal); \
64 (_ahp)->cal_list_last = (_perCal); \
65 (_perCal)->calNext = (_ahp)->cal_list; \
66 } \
67 } while (0)
68
69enum ath9k_cal_state {
70 CAL_INACTIVE,
71 CAL_WAITING,
72 CAL_RUNNING,
73 CAL_DONE
74};
75
76#define MIN_CAL_SAMPLES 1
77#define MAX_CAL_SAMPLES 64
78#define INIT_LOG_COUNT 5
79#define PER_MIN_LOG_COUNT 2
80#define PER_MAX_LOG_COUNT 10
81
82struct ath9k_percal_data {
83 u32 calType;
84 u32 calNumSamples;
85 u32 calCountMax;
86 void (*calCollect) (struct ath_hw *);
87 void (*calPostProc) (struct ath_hw *, u8);
88};
89
90struct ath9k_cal_list {
91 const struct ath9k_percal_data *calData;
92 enum ath9k_cal_state calState;
93 struct ath9k_cal_list *calNext;
94};
95
96struct ath9k_nfcal_hist {
97 int16_t nfCalBuffer[ATH9K_NF_CAL_HIST_MAX];
98 u8 currIndex;
99 int16_t privNF;
100 u8 invalidNFcount;
101};
102
103#define MAX_PACAL_SKIPCOUNT 8
104struct ath9k_pacal_info{
105 int32_t prev_offset; /* Previous value of PA offset value */
106 int8_t max_skipcount; /* Max No. of times PACAL can be skipped */
107 int8_t skipcount; /* No. of times the PACAL to be skipped */
108};
109
110bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
111void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update);
112int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
113bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
114void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
115 struct ath9k_channel *chan);
116void ath9k_hw_bstuck_nfcal(struct ath_hw *ah);
117void ath9k_hw_reset_calibration(struct ath_hw *ah,
118 struct ath9k_cal_list *currCal);
119s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan,
120 s16 nf);
121
122
123#endif /* CALIB_H */
124

source code of linux/drivers/net/wireless/ath/ath9k/calib.h