190 lines
6.2 KiB
C
190 lines
6.2 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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* Copyright (C) 2011 by Amaury Pouly
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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 "audioin-imx233.h"
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#include "pcm_sampr.h"
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/* values in half-dB, one for each setting */
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static int audioin_vol[2][4]; /* 0=left, 1=right */
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static int audioin_select[2]; /* idem */
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void imx233_audioin_preinit(void)
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{
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/* Enable AUDIOIN block */
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imx233_reset_block(&HW_AUDIOIN_CTRL);
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/* Set word-length to 16-bit */
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BF_SET(AUDIOIN_CTRL, WORD_LENGTH);
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/* Gate Off */
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BF_SET(AUDIOIN_CTRL, CLKGATE);
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}
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void imx233_audioin_postinit(void)
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{
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}
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void imx233_audioin_open(void)
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{
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/* Gate On */
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BF_CLR(AUDIOIN_CTRL, CLKGATE);
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/* Enable ADC clock */
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BF_CLR(AUDIOIN_ANACLKCTRL, CLKGATE);
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/* Power up ADC (WARNING audioout register) */
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BF_CLR(AUDIOOUT_PWRDN, ADC);
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/* Start ADC */
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BF_SET(AUDIOIN_CTRL, RUN);
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}
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void imx233_audioin_close(void)
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{
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/* Stop ADC (doc says it gate off the module but that's not the case) */
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BF_CLR(AUDIOIN_CTRL, RUN);
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/* Disable ADC clock */
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BF_SET(AUDIOIN_ANACLKCTRL, CLKGATE);
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/* Power down ADC (WARNING audioout register) */
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BF_SET(AUDIOOUT_PWRDN, ADC);
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/* Gate Off */
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BF_SET(AUDIOIN_CTRL, CLKGATE);
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}
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static void apply_config(void)
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{
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int select_l = audioin_select[0];
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int select_r = audioin_select[1];
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int vol_l = audioin_vol[0][select_l];
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int vol_r = audioin_vol[1][select_r];
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/* Depending on the input, we have three available volumes to tweak:
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* - adc volume: -100dB -> -0.5dB in 0.5dB steps
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* - mux gain: 0dB -> 22.5dB in 1.5dB steps
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* - mic gain: 0dB -> 40dB in 10dB steps (except for 10)
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*
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* This means two available volume ranges:
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* - line1/line2/hp: -100dB -> 22dB in 0.5dB steps
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* - microphone: -100dB -> 62dB in 0.5dB steps
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*/
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/* First apply mic gain of possible and necessary
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* Only left volume is relevant with microphone
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* If gain is > 22dB, use mic gain */
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if(select_l == AUDIOIN_SELECT_MICROPHONE && vol_l > 22 * 2)
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{
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/* take lowest microphone gain to get back into the -100..22 range
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* achievable with mux+adc.*/
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/* from 52.5 dB and beyond: 40dB gain */
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if(vol_l > 52 * 2)
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{
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BF_WR_V(AUDIOIN_MICLINE, MIC_GAIN, 40dB);
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vol_l -= 40 * 2;
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}
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/* from 42.5 dB to 52dB: 30dB gain */
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else if(vol_l > 42 * 2)
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{
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BF_WR_V(AUDIOIN_MICLINE, MIC_GAIN, 30dB);
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vol_l -= 30 * 2;
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}
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/* from 22.5 dB to 42dB: 20dB gain */
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else if(vol_l > 22 * 2)
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{
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BF_WR_V(AUDIOIN_MICLINE, MIC_GAIN, 20dB);
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vol_l -= 20 * 2;
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}
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/* otherwise 0dB gain */
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else
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BF_WR_V(AUDIOIN_MICLINE, MIC_GAIN, 0dB);
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}
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/* max is 22dB */
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vol_l = MIN(vol_l, 44);
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vol_r = MIN(vol_r, 44);
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/* we use the mux volume to reach the volume or higher with 1.5dB steps
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* and then we use the ADC to go below 0dB or to obtain 0.5dB accuracy */
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int mux_vol_l = MAX(0, (vol_l + 2) / 3); /* 1.5dB = 3 * 0.5dB */
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int mux_vol_r = MAX(0, (vol_r + 2) / 3);
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#if IMX233_SUBTARGET >= 3700
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unsigned adc_zcd = BM_AUDIOIN_ADCVOL_EN_ADC_ZCD;
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#else
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unsigned adc_zcd = 0;
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#endif
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HW_AUDIOIN_ADCVOL = adc_zcd | BF_OR4(AUDIOIN_ADCVOL, SELECT_LEFT(select_l),
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SELECT_RIGHT(select_r), GAIN_LEFT(mux_vol_l), GAIN_RIGHT(mux_vol_r));
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vol_l -= mux_vol_l * 3; /* mux vol is in 1.5dB = 3 * 0.5dB steps */
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vol_r -= mux_vol_l * 3;
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vol_l = MIN(MAX(-200, vol_l), -1);
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vol_r = MIN(MAX(-200, vol_r), -1);
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/* unmute, enable zero cross and set volume.
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* 0xfe is -0.5dB */
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HW_AUDIOIN_ADCVOLUME = BF_OR3(AUDIOIN_ADCVOLUME, EN_ZCD(1),
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VOLUME_LEFT(0xff + vol_l), VOLUME_RIGHT(0xff + vol_r));
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}
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void imx233_audioin_select_mux_input(bool right, int select)
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{
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audioin_select[right] = select;
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apply_config();
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}
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void imx233_audioin_set_vol(bool right, int vol, int select)
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{
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audioin_vol[right][select] = vol;
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apply_config();
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}
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void imx233_audioin_enable_mic(bool enable)
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{
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if(enable)
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{
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BF_WR_V(AUDIOIN_MICLINE, MIC_RESISTOR, 2KOhm);
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BF_WR(AUDIOIN_MICLINE, MIC_BIAS, 4);
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BF_WR(AUDIOIN_MICLINE, MIC_SELECT, 1);
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}
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else
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BF_WR_V(AUDIOIN_MICLINE, MIC_RESISTOR, Off);
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}
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void imx233_audioin_set_freq(int fsel)
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{
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static struct
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{
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int base_mult;
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int src_hold;
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int src_int;
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int src_frac;
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}dacssr[HW_NUM_FREQ] =
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{
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HW_HAVE_8_([HW_FREQ_8] = { 0x1, 0x3, 0x17, 0xe00 } ,)
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HW_HAVE_11_([HW_FREQ_11] = { 0x1, 0x3, 0x11, 0x37 } ,)
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HW_HAVE_12_([HW_FREQ_12] = { 0x1, 0x3, 0xf, 0x13ff },)
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HW_HAVE_16_([HW_FREQ_16] = { 0x1, 0x1, 0x17, 0xe00},)
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HW_HAVE_22_([HW_FREQ_22] = { 0x1, 0x1, 0x11, 0x37 },)
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HW_HAVE_24_([HW_FREQ_24] = { 0x1, 0x1, 0xf, 0x13ff },)
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HW_HAVE_32_([HW_FREQ_32] = { 0x1, 0x0, 0x17, 0xe00},)
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HW_HAVE_44_([HW_FREQ_44] = { 0x1, 0x0, 0x11, 0x37 },)
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HW_HAVE_48_([HW_FREQ_48] = { 0x1, 0x0, 0xf, 0x13ff },)
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HW_HAVE_64_([HW_FREQ_64] = { 0x2, 0x0, 0x17, 0xe00},)
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HW_HAVE_88_([HW_FREQ_88] = { 0x2, 0x0, 0x11, 0x37 },)
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HW_HAVE_96_([HW_FREQ_96] = { 0x2, 0x0, 0xf, 0x13ff },)
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};
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HW_AUDIOIN_ADCSRR = BF_OR4(AUDIOIN_ADCSRR,
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SRC_FRAC(dacssr[fsel].src_frac), SRC_INT(dacssr[fsel].src_int),
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SRC_HOLD(dacssr[fsel].src_hold), BASEMULT(dacssr[fsel].base_mult));
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}
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