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https://github.com/torvalds/linux
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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
102 lines
3.9 KiB
C
102 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __UAPI_SOUND_TLV_H
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#define __UAPI_SOUND_TLV_H
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#define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */
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#define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */
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#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */
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#define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */
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#define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */
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#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */
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/*
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* channel-mapping TLV items
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* TLV length must match with num_channels
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*/
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#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
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#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
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#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
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/*
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* TLV structure is right behind the struct snd_ctl_tlv:
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* unsigned int type - see SNDRV_CTL_TLVT_*
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* unsigned int length
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* .... data aligned to sizeof(unsigned int), use
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* block_length = (length + (sizeof(unsigned int) - 1)) &
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* ~(sizeof(unsigned int) - 1)) ....
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*/
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#define SNDRV_CTL_TLVD_ITEM(type, ...) \
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(type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__
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#define SNDRV_CTL_TLVD_LENGTH(...) \
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((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
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#define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff
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#define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000
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#define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \
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(min), \
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((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \
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((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0))
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#define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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}
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/* dB scale specified with min/max values instead of step */
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#define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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}
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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}
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/* linear volume between min_dB and max_dB (.01dB unit) */
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#define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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}
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/* dB range container:
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* Items in dB range container must be ordered by their values and by their
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* dB values. This implies that larger values must correspond with larger
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* dB values (which is also required for all other mixer controls).
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*/
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/* Each item is: <min> <max> <TLV> */
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#define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999
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#endif
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