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a3fe07ff12
Add HW volume control via ES9018K2M, and reorganize eros_qn_codec.c/.h, audiohw-erosqnative.c. This automatically detects the presence of the new DAC and uses its hardware volume scaling. If not present, use same SWVOL we have been using so far. Add debug menu readout of SWVOL/I2C result. Break out es9018k2m stuff into its own file so that maybe it can be useful to other ports. Note that we may need to get smarter about detecting the DAC type if/when another model emerges. Change-Id: I586a1cf7f150dd6b4e221157859825952840af56
56 lines
2.1 KiB
C
56 lines
2.1 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) 2021 Andrew Ryabinin, Dana Conrad
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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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#ifndef _EROS_QN_CODEC_H
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#define _EROS_QN_CODEC_H
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/*
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* Note: Maximum volume is set one step below unity in order to
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* avoid overflowing pcm samples due to our DC Offset.
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*
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* The DAC's output is hot enough this should not be an issue.
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*/
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#define PCM5102A_VOLUME_MIN -740
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#define PCM5102A_VOLUME_MAX -20
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/* a small DC offset prevents play/pause clicking due to the PCM5102A DAC auto-muting */
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#define PCM_DC_OFFSET_VALUE -1
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AUDIOHW_SETTING(VOLUME, "dB", 0, 2, PCM5102A_VOLUME_MIN/10, PCM5102A_VOLUME_MAX/10, 0)
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/* flag indicating whether this is a new revision unit with the ES9018K2M DAC */
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extern int es9018k2m_present_flag;
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/* Switch the output sink. 0 - headphones, 1 - line out */
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void eros_qn_switch_output(int select);
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/* Record last volume setting for switching between headphones/line out */
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void eros_qn_set_last_vol(long int vol_l, long int vol_r);
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/* this just calls audiohw_set_volume() with the last (locally) known volume,
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* used for switching to/from fixed line out volume. */
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void eros_qn_set_outputs(void);
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/* returns (global_settings.volume_limit * 10) */
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int eros_qn_get_volume_limit(void);
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#endif
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