1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 3 #ifndef __UAPI_SOUND_TLV_H 4 #define __UAPI_SOUND_TLV_H 5 6 #define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ 7 #define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ 8 #define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ 9 #define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ 10 #define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */ 11 #define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */ 12 13 /* 14 * channel-mapping TLV items 15 * TLV length must match with num_channels 16 */ 17 #define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */ 18 #define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */ 19 #define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */ 20 21 /* 22 * TLV structure is right behind the struct snd_ctl_tlv: 23 * unsigned int type - see SNDRV_CTL_TLVT_* 24 * unsigned int length 25 * .... data aligned to sizeof(unsigned int), use 26 * block_length = (length + (sizeof(unsigned int) - 1)) & 27 * ~(sizeof(unsigned int) - 1)) .... 28 */ 29 #define SNDRV_CTL_TLVD_ITEM(type, ...) \ 30 (type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__ 31 #define SNDRV_CTL_TLVD_LENGTH(...) \ 32 ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ })) 33 34 /* Accessor offsets for TLV data items */ 35 #define SNDRV_CTL_TLVO_TYPE 0 36 #define SNDRV_CTL_TLVO_LEN 1 37 38 #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ 39 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) 40 #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ 41 unsigned int name[] = { \ 42 SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \ 43 } 44 45 #define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff 46 #define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000 47 #define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 48 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \ 49 (min), \ 50 ((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \ 51 ((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0)) 52 #define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \ 53 unsigned int name[] = { \ 54 SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ 55 } 56 57 /* Accessor offsets for min, mute and step items in dB scale type TLV */ 58 #define SNDRV_CTL_TLVO_DB_SCALE_MIN 2 59 #define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3 60 61 /* dB scale specified with min/max values instead of step */ 62 #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 63 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) 64 #define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 65 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB)) 66 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \ 67 unsigned int name[] = { \ 68 SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ 69 } 70 #define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \ 71 unsigned int name[] = { \ 72 SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 73 } 74 75 /* Accessor offsets for min, max items in db-minmax types of TLV. */ 76 #define SNDRV_CTL_TLVO_DB_MINMAX_MIN 2 77 #define SNDRV_CTL_TLVO_DB_MINMAX_MAX 3 78 79 /* linear volume between min_dB and max_dB (.01dB unit) */ 80 #define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 81 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) 82 #define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \ 83 unsigned int name[] = { \ 84 SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ 85 } 86 87 /* Accessor offsets for min, max items in db-linear type of TLV. */ 88 #define SNDRV_CTL_TLVO_DB_LINEAR_MIN 2 89 #define SNDRV_CTL_TLVO_DB_LINEAR_MAX 3 90 91 /* dB range container: 92 * Items in dB range container must be ordered by their values and by their 93 * dB values. This implies that larger values must correspond with larger 94 * dB values (which is also required for all other mixer controls). 95 */ 96 /* Each item is: <min> <max> <TLV> */ 97 #define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \ 98 SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__) 99 #define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \ 100 unsigned int name[] = { \ 101 SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \ 102 } 103 104 #define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999 105 106 #endif 107