1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
8 #define RTW89_MIN_DBM (-41.25 * (1 << RTW89_DBM_QUARTER_FACTOR))
10 #define RTW89_DB_INVERT_TABLE_OFFSET (-RTW89_MIN_DBM)
14 	75, 79, 84, 89, 94, 100, 106, 112, 119, 126, 133, 141, 150, 158, 168, 178, 188,
104 	int r = ARRAY_SIZE(db_invert_table) - 1;  in rtw89_linear_to_db_quarter()
109 		m = l + (r - l) / 2;  in rtw89_linear_to_db_quarter()
112 			return m - (s32)RTW89_DB_INVERT_TABLE_OFFSET;  in rtw89_linear_to_db_quarter()
115 			r = m - 1;  in rtw89_linear_to_db_quarter()
124 	else if (val - db_invert_table[r] <= db_invert_table[l] - val)  in rtw89_linear_to_db_quarter()
125 		return r - (s32)RTW89_DB_INVERT_TABLE_OFFSET;  in rtw89_linear_to_db_quarter()
127 		return l - (s32)RTW89_DB_INVERT_TABLE_OFFSET;  in rtw89_linear_to_db_quarter()
137 u64 rtw89_db_quarter_to_linear(s32 db)  in rtw89_db_quarter_to_linear()  argument
139 	/* supported range -41.25 to 96 dBm, in unit of 0.25 dBm */  in rtw89_db_quarter_to_linear()
140 	db = clamp_t(s32, db, RTW89_MIN_DBM, RTW89_MAX_DBM);  in rtw89_db_quarter_to_linear()
141 	db += (s32)RTW89_DB_INVERT_TABLE_OFFSET;  in rtw89_db_quarter_to_linear()
143 	return db_invert_table[db];  in rtw89_db_quarter_to_linear()
147 u64 rtw89_db_to_linear(s32 db)  in rtw89_db_to_linear()  argument
149 	return rtw89_db_quarter_to_linear(db << RTW89_DBM_QUARTER_FACTOR);  in rtw89_db_to_linear()
161 	memcpy(buf + size - sizeof(ellipsis), ellipsis, sizeof(ellipsis));  in rtw89_might_trailing_ellipsis()