e61e9c61d0
* SOUND_x enum can be generated by audiohw_settings.h along with settings entries and sound_val2phys. * VOLUME_MIN and VOLUME_MAX are no longer necessary within sound.c. If you need them, they are for target-defined purposes. * Fix up SDL volume implementation in sdl.c. Move sim volume calculation code to pcm-sdl.c. * Min trigger tresholds were based upon VOLUME_MIN for some reason. These setting have nothing to do with playback volume. Since it is no longer present, set these at -89dB which is the minimum peak meter sensitivity setting. * Fix an oversight in wm8758.c. I forgot to add the dB->register conversion to audiohw_set_volume. Change-Id: Ie1df33f1793eee75e6793f16bc7bddd16edb7f75
115 lines
2.9 KiB
C
115 lines
2.9 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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* Driver for TSC2100 audio codec
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*
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* Copyright (c) 2008 Jonathan Gordon
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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 "cpu.h"
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#include "debug.h"
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#include "system.h"
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#include "audio.h"
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#include "audiohw.h"
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#include "sound.h"
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#include "tsc2100.h"
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static bool is_muted = false;
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/* convert tenth of dB volume to volume register value */
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static int vol_tenthdb2hw(int db)
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{
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/* 0 to -63.0dB in 1dB steps, tsc2100 can goto -63.5 in 0.5dB steps */
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if (db <= -640) {
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return 0x7E;
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} else if (db >= 0) {
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return 0x00;
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} else {
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return(-((db)/5));
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}
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}
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void audiohw_init(void)
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{
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short val = tsc2100_readreg(TSAC4_PAGE, TSAC4_ADDRESS);
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/* disable DAC PGA soft-stepping */
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val |= TSAC4_DASTDP;
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tsc2100_writereg(TSAC4_PAGE, TSAC4_ADDRESS, val);
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}
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static void audiohw_mute(bool mute)
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{
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short vol = tsc2100_readreg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS);
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/* left mute bit == 1<<15
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right mute bit == 1<<7
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*/
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if (mute)
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{
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vol |= (1<<15)|(1<<7);
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} else
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{
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vol &= ~((1<<15)|(1<<7));
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}
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is_muted = mute;
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tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS, vol);
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}
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void audiohw_postinit(void)
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{
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audiohw_mute(false);
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}
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void audiohw_set_volume(int vol_l, int vol_r)
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{
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vol_l = vol_tenthdb2hw(vol_l);
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vol_r = vol_tenthdb2hw(vol_r);
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tsc2100_writereg(TSDACGAIN_PAGE, TSDACGAIN_ADDRESS,
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(short)((vol_l<<8) | vol_r) );
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}
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void audiohw_close(void)
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{
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/* mute headphones */
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audiohw_mute(true);
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}
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void audiohw_set_frequency(int fsel)
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{
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int reg_val;
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reg_val = tsc2100_readreg(CONTROL_PAGE2, TSAC1_ADDRESS);
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reg_val &= ~(0x07<<3);
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switch(fsel)
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{
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case HW_FREQ_8:
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reg_val |= (0x06<<3);
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break;
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case HW_FREQ_11:
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reg_val |= (0x04<<3);
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break;
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case HW_FREQ_22:
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reg_val |= (0x02<<3);
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break;
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case HW_FREQ_44:
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default:
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break;
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}
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tsc2100_writereg(CONTROL_PAGE2, TSAC1_ADDRESS, reg_val);
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}
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