| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * This file is only included exactly once! |
| * |
| * The tables here are derived from the tas3004 datasheet, |
| * modulo typo corrections and some smoothing... |
| */ |
| |
| #define TAS3004_TREBLE_MIN 0 |
| #define TAS3004_TREBLE_MAX 72 |
| #define TAS3004_BASS_MIN 0 |
| #define TAS3004_BASS_MAX 72 |
| #define TAS3004_TREBLE_ZERO 36 |
| #define TAS3004_BASS_ZERO 36 |
| |
| static u8 tas3004_treble_table[] = { |
| 150, /* -18 dB */ |
| 149, |
| 148, |
| 147, |
| 146, |
| 145, |
| 144, |
| 143, |
| 142, |
| 141, |
| 140, |
| 139, |
| 138, |
| 137, |
| 136, |
| 135, |
| 134, |
| 133, |
| 132, |
| 131, |
| 130, |
| 129, |
| 128, |
| 127, |
| 126, |
| 125, |
| 124, |
| 123, |
| 122, |
| 121, |
| 120, |
| 119, |
| 118, |
| 117, |
| 116, |
| 115, |
| 114, /* 0 dB */ |
| 113, |
| 112, |
| 111, |
| 109, |
| 108, |
| 107, |
| 105, |
| 104, |
| 103, |
| 101, |
| 99, |
| 98, |
| 96, |
| 93, |
| 91, |
| 89, |
| 86, |
| 83, |
| 81, |
| 77, |
| 74, |
| 71, |
| 67, |
| 63, |
| 59, |
| 54, |
| 49, |
| 44, |
| 38, |
| 32, |
| 26, |
| 19, |
| 10, |
| 4, |
| 2, |
| 1, /* +18 dB */ |
| }; |
| |
| static inline u8 tas3004_treble(int idx) |
| { |
| return tas3004_treble_table[idx]; |
| } |
| |
| /* I only save the difference here to the treble table |
| * so that the binary is smaller... |
| * I have also ignored completely differences of |
| * +/- 1 |
| */ |
| static s8 tas3004_bass_diff_to_treble[] = { |
| 2, /* 7 dB, offset 50 */ |
| 2, |
| 2, |
| 2, |
| 2, |
| 1, |
| 2, |
| 2, |
| 2, |
| 3, |
| 4, |
| 4, |
| 5, |
| 6, |
| 7, |
| 8, |
| 9, |
| 10, |
| 11, |
| 14, |
| 13, |
| 8, |
| 1, /* 18 dB */ |
| }; |
| |
| static inline u8 tas3004_bass(int idx) |
| { |
| u8 result = tas3004_treble_table[idx]; |
| |
| if (idx >= 50) |
| result += tas3004_bass_diff_to_treble[idx-50]; |
| return result; |
| } |