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 
30 struct 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 
69 enum 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 
82 struct 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 
90 struct ath9k_cal_list {
91 	const struct ath9k_percal_data *calData;
92 	enum ath9k_cal_state calState;
93 	struct ath9k_cal_list *calNext;
94 };
95 
96 struct 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
104 struct 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 
110 bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
111 void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update);
112 int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
113 bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
114 void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
115 				  struct ath9k_channel *chan);
116 void ath9k_hw_bstuck_nfcal(struct ath_hw *ah);
117 void ath9k_hw_reset_calibration(struct ath_hw *ah,
118 				struct ath9k_cal_list *currCal);
119 s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan,
120 			   s16 nf);
121 
122 
123 #endif /* CALIB_H */
124