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 /* Accessor offsets for TLV data items */ 46 #define SNDRV_CTL_TLVO_TYPE 0 47 #define SNDRV_CTL_TLVO_LEN 1 48 49 #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ 50 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) 51 #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ 52 unsigned int name[] = { \ 53 SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \ 54 } 55 56 #define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff 57 #define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000 58 #define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 59 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \ 60 (min), \ 61 ((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \ 62 ((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0)) 63 #define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \ 64 unsigned int name[] = { \ 65 SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 66 } 67 68 /* Accessor offsets for min, mute and step items in dB scale type TLV */ 69 #define SNDRV_CTL_TLVO_DB_SCALE_MIN 2 70 #define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3 71 72 /* dB scale specified with min/max values instead of step */ 73 #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 74 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) 75 #define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 76 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB)) 77 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \ 78 unsigned int name[] = { \ 79 SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 80 } 81 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \ 82 unsigned int name[] = { \ 83 SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 84 } 85 86 /* Accessor offsets for min, max items in db-minmax types of TLV. */ 87 #define SNDRV_CTL_TLVO_DB_MINMAX_MIN 2 88 #define SNDRV_CTL_TLVO_DB_MINMAX_MAX 3 89 90 /* linear volume between min_dB and max_dB (.01dB unit) */ 91 #define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 92 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) 93 #define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \ 94 unsigned int name[] = { \ 95 SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 96 } 97 98 /* Accessor offsets for min, max items in db-linear type of TLV. */ 99 #define SNDRV_CTL_TLVO_DB_LINEAR_MIN 2 100 #define SNDRV_CTL_TLVO_DB_LINEAR_MAX 3 101 102 /* dB range container: 103 * Items in dB range container must be ordered by their values and by their 104 * dB values. This implies that larger values must correspond with larger 105 * dB values (which is also required for all other mixer controls). 106 */ 107 /* Each item is: <min> <max> <TLV> */ 108 #define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \ 109 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__) 110 #define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \ 111 unsigned int name[] = { \ 112 SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \ 113 } 114 115 #define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999 116 117 #endif