176 lines
4.0 KiB
C
176 lines
4.0 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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*
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* Copyright (c) 2018 Marcin Bukat
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* Copyright (c) 2019 Roman Stolyarov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "audio.h"
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#include "audiohw.h"
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#include "system.h"
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#include "kernel.h"
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#include "panic.h"
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#include "sysfs.h"
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#include "alsa-controls.h"
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#include "pcm-alsa.h"
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#include <sys/ioctl.h>
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static int fd_hw = -1;
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static int ak_hw = -1;
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static int vol_sw[2] = {0};
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static long int vol_hw[2] = {0};
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static void hw_open(void)
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{
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fd_hw = open("/dev/snd/controlC0", O_RDWR);
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if(fd_hw < 0)
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panicf("Cannot open '/dev/snd/controlC0'");
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ak_hw = open("/dev/ak4376", O_RDWR);
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if(ak_hw < 0)
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panicf("Cannot open '/dev/ak4376'");
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if(ioctl(ak_hw, 0x20003424, 0) < 0)
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{
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panicf("Call cmd AK4376_POWER_ON fail");
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}
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}
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static void hw_close(void)
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{
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if(ioctl(ak_hw, 0x20003425, 0) < 0)
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{
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panicf("Call cmd AK4376_POWER_OFF fail");
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}
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close(ak_hw);
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close(fd_hw);
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ak_hw = fd_hw = -1;
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}
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void audiohw_preinit(void)
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{
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alsa_controls_init("default");
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hw_open();
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// NOTE:
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// Of the exported controls, only these do anything:
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// 10 DACL Playback Volume
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// 11 DACR Playback Volume
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// 12 Low Mode Switch (see table 25 in datasheet, not simple..)
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audiohw_mute(false);
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}
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void audiohw_postinit(void)
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{
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}
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void audiohw_close(void)
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{
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hw_close();
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alsa_controls_close();
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}
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void audiohw_set_frequency(int fsel)
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{
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(void)fsel;
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}
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static int muted = -1;
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void audiohw_set_volume(int vol_l, int vol_r)
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{
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int vol[2];
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if (fd_hw < 0)
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return;
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vol[0] = vol_l / 20;
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vol[1] = vol_r / 20;
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for (int i = 0; i < 2; i++)
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{
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if (vol[i] > -56)
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{
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if (vol[i] < -12)
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{
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vol_hw[i] = 1;
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vol_sw[i] = vol[i] + 12;
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}
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else
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{
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vol_hw[i] = 25 - (-vol[i] * 2);
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vol_sw[i] = 0;
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}
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}
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else
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{
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// Mute
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vol_hw[i] = 0;
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vol_sw[i] = 0;
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}
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}
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if (!muted) {
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alsa_controls_set_ints("DACL Playback Volume", 1, &vol_hw[0]);
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alsa_controls_set_ints("DACR Playback Volume", 1, &vol_hw[1]);
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pcm_set_mixer_volume(vol_sw[0], vol_sw[1]);
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}
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}
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void audiohw_mute(int mute)
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{
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long int vol0 = 0;
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if (fd_hw < 0 || muted == mute)
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return;
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muted = mute;
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if(mute)
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{
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alsa_controls_set_ints("DACL Playback Volume", 1, &vol0);
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alsa_controls_set_ints("DACR Playback Volume", 1, &vol0);
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pcm_set_mixer_volume(0, 0);
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}
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else
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{
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alsa_controls_set_ints("DACL Playback Volume", 1, &vol_hw[0]);
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alsa_controls_set_ints("DACR Playback Volume", 1, &vol_hw[1]);
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pcm_set_mixer_volume(vol_sw[0], vol_sw[1]);
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}
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}
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void audiohw_set_filter_roll_off(int value)
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{
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if (fd_hw < 0)
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return;
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/* 0 = Sharp;
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1 = Slow;
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2 = Short Sharp
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3 = Short Slow */
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#if 0 // defined(FIIO_M3K_LINUX)
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// AK4376 supports this but the control isn't wired into ALSA!
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long int value_hw = value;
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alsa_controls_set_ints("AK4376 Digital Filter", 1, &value_hw);
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#endif
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(void)value;
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}
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