1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation; either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef __UAPI_SOUND_TLV_H 15 #define __UAPI_SOUND_TLV_H 16 17 #define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ 18 #define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ 19 #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ 20 #define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ 21 #define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */ 22 #define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */ 23 24 /* 25 * channel-mapping TLV items 26 * TLV length must match with num_channels 27 */ 28 #define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */ 29 #define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */ 30 #define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */ 31 32 /* 33 * TLV structure is right behind the struct snd_ctl_tlv: 34 * unsigned int type - see SNDRV_CTL_TLVT_* 35 * unsigned int length 36 * .... data aligned to sizeof(unsigned int), use 37 * block_length = (length + (sizeof(unsigned int) - 1)) & 38 * ~(sizeof(unsigned int) - 1)) .... 39 */ 40 #define SNDRV_CTL_TLVD_ITEM(type, ...) \ 41 (type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__ 42 #define SNDRV_CTL_TLVD_LENGTH(...) \ 43 ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ })) 44 45 #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ 46 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) 47 #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ 48 unsigned int name[] = { \ 49 SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \ 50 } 51 52 #define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff 53 #define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000 54 #define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 55 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \ 56 (min), \ 57 ((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \ 58 ((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0)) 59 #define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \ 60 unsigned int name[] = { \ 61 SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 62 } 63 64 /* dB scale specified with min/max values instead of step */ 65 #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 66 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) 67 #define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 68 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB)) 69 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \ 70 unsigned int name[] = { \ 71 SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 72 } 73 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \ 74 unsigned int name[] = { \ 75 SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 76 } 77 78 /* linear volume between min_dB and max_dB (.01dB unit) */ 79 #define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 80 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) 81 #define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \ 82 unsigned int name[] = { \ 83 SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 84 } 85 86 /* dB range container: 87 * Items in dB range container must be ordered by their values and by their 88 * dB values. This implies that larger values must correspond with larger 89 * dB values (which is also required for all other mixer controls). 90 */ 91 /* Each item is: <min> <max> <TLV> */ 92 #define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \ 93 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__) 94 #define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \ 95 unsigned int name[] = { \ 96 SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \ 97 } 98 99 #define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999 100 101 #endif 102