0356e6283c
This adds bi-directional (host->device, device->host) volume/mute support to the f_uac1 driver by adding Feature Units and interrupt endpoint. Currently only master channel is supported. Volume and mute are configurable through configfs, by default volume has -100..0 dB range with 1 dB step. Similar to existing flexible endpoints configuration, Feature Unit won't be added to the topology if both mute and volume are not enabled, also interrupt endpoint isn't added to the device if no feature unit is present Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com> Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com> Link: https://lore.kernel.org/r/20210712125529.76070-5-pavel.hofman@ivitera.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* u_uac1.h - Utility definitions for UAC1 function
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*
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* Copyright (C) 2016 Ruslan Bilovol <ruslan.bilovol@gmail.com>
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*/
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#ifndef __U_UAC1_H
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#define __U_UAC1_H
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#include <linux/usb/composite.h>
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#define UAC1_OUT_EP_MAX_PACKET_SIZE 200
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#define UAC1_DEF_CCHMASK 0x3
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#define UAC1_DEF_CSRATE 48000
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#define UAC1_DEF_CSSIZE 2
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#define UAC1_DEF_PCHMASK 0x3
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#define UAC1_DEF_PSRATE 48000
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#define UAC1_DEF_PSSIZE 2
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#define UAC1_DEF_REQ_NUM 2
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#define UAC1_DEF_INT_REQ_NUM 10
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#define UAC1_DEF_MUTE_PRESENT 1
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#define UAC1_DEF_VOLUME_PRESENT 1
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#define UAC1_DEF_MIN_DB (-100*256) /* -100 dB */
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#define UAC1_DEF_MAX_DB 0 /* 0 dB */
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#define UAC1_DEF_RES_DB (1*256) /* 1 dB */
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struct f_uac1_opts {
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struct usb_function_instance func_inst;
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int c_chmask;
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int c_srate;
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int c_ssize;
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int p_chmask;
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int p_srate;
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int p_ssize;
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bool p_mute_present;
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bool p_volume_present;
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s16 p_volume_min;
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s16 p_volume_max;
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s16 p_volume_res;
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bool c_mute_present;
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bool c_volume_present;
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s16 c_volume_min;
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s16 c_volume_max;
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s16 c_volume_res;
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int req_number;
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unsigned bound:1;
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struct mutex lock;
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int refcnt;
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};
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#endif /* __U_UAC1_H */
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