1 files changed, 121 insertions, 6 deletions

diff --git a/firmware/target/mips/ingenic_x1000/fiiom3k/audiohw-fiiom3k.c b/firmware/target/mips/ingenic_x1000/fiiom3k/audiohw-fiiom3k.c
index f7dced8f54..9374d23a81 100644
--- a/firmware/target/mips/ingenic_x1000/fiiom3k/audiohw-fiiom3k.c
+++ b/firmware/target/mips/ingenic_x1000/fiiom3k/audiohw-fiiom3k.c
@@ -7,7 +7,7 @@
  *                     \/            \/     \/    \/            \/
  * $Id$
  *
- * Copyright (C) 2021 Aidan MacDonald
+ * Copyright (C) 2021-2022 Aidan MacDonald
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -20,6 +20,7 @@
  ****************************************************************************/
 
 #include "audiohw.h"
+#include "audio.h"
 #include "system.h"
 #include "pcm_sampr.h"
 #include "aic-x1000.h"
@@ -27,6 +28,11 @@
 #include "gpio-x1000.h"
 #include "logf.h"
 
+static int cur_audio_source = AUDIO_SRC_PLAYBACK;
+static int cur_vol_r = AK4376_MIN_VOLUME;
+static int cur_vol_l = AK4376_MIN_VOLUME;
+static int cur_recvol = 0;
+static int cur_filter_roll_off = 0;
 static int cur_fsel = HW_FREQ_48;
 static int cur_power_mode = SOUND_HIGH_POWER;
 
@@ -60,29 +66,138 @@ void audiohw_postinit(void)
 
 void audiohw_close(void)
 {
-    ak4376_close();
+    if(cur_audio_source == AUDIO_SRC_PLAYBACK)
+        ak4376_close();
+    else if(cur_audio_source == AUDIO_SRC_MIC)
+        x1000_icodec_close();
+}
+
+void audio_set_output_source(int source)
+{
+    /* this is a no-op */
+    (void)source;
+}
+
+void audio_input_mux(int source, unsigned flags)
+{
+    (void)flags;
+
+    if(source == cur_audio_source)
+        return;
+
+    /* close whatever codec is currently in use */
+    audiohw_close();
+    aic_enable_i2s_bit_clock(false);
+
+    /* switch to new source */
+    cur_audio_source = source;
+
+    if(source == AUDIO_SRC_PLAYBACK) {
+        /* power on DAC */
+        aic_set_external_codec(true);
+        aic_set_i2s_mode(AIC_I2S_MASTER_MODE);
+        ak4376_open();
+
+        /* apply the old settings */
+        audiohw_set_volume(cur_vol_l, cur_vol_r);
+        audiohw_set_filter_roll_off(cur_filter_roll_off);
+        set_ak_freqmode();
+    } else if(source == AUDIO_SRC_MIC) {
+        aic_set_external_codec(false);
+        aic_set_i2s_mode(AIC_I2S_SLAVE_MODE);
+        /* Note: Sampling frequency is irrelevant here */
+        aic_set_i2s_clock(X1000_CLK_EXCLK, 48000, 0);
+        aic_enable_i2s_bit_clock(true);
+
+        x1000_icodec_open();
+
+        /* configure the mic */
+        x1000_icodec_mic1_enable(true);
+        x1000_icodec_mic1_bias_enable(true);
+        x1000_icodec_mic1_configure(JZCODEC_MIC1_DIFFERENTIAL |
+                                    JZCODEC_MIC1_BIAS_2_08V);
+
+        /* configure the ADC */
+        x1000_icodec_adc_mic_sel(JZCODEC_MIC_SEL_ANALOG);
+        x1000_icodec_adc_highpass_filter(true);
+        x1000_icodec_adc_frequency(cur_fsel);
+        x1000_icodec_adc_enable(true);
+
+        /* configure the mixer to put mic input in both channels */
+        x1000_icodec_mixer_enable(true);
+        x1000_icodec_write(JZCODEC_MIX2, 0x10);
+
+        /* set gain and unmute */
+        audiohw_set_recvol(cur_recvol, 0, AUDIO_GAIN_MIC);
+        x1000_icodec_adc_mute(false);
+    } else {
+        logf("bad audio input source: %d (flags: %x)", source, flags);
+    }
 }
 
 void audiohw_set_volume(int vol_l, int vol_r)
 {
-    ak4376_set_volume(vol_l, vol_r);
+    cur_vol_l = vol_l;
+    cur_vol_r = vol_r;
+
+    if(cur_audio_source == AUDIO_SRC_PLAYBACK)
+        ak4376_set_volume(vol_l, vol_r);
 }
 
 void audiohw_set_filter_roll_off(int val)
 {
-    ak4376_set_filter_roll_off(val);
+    cur_filter_roll_off = val;
+
+    if(cur_audio_source == AUDIO_SRC_PLAYBACK)
+        ak4376_set_filter_roll_off(val);
 }
 
 void audiohw_set_frequency(int fsel)
 {
     cur_fsel = fsel;
-    set_ak_freqmode();
+
+    if(cur_audio_source == AUDIO_SRC_PLAYBACK)
+        set_ak_freqmode();
+    else
+        x1000_icodec_adc_frequency(fsel);
 }
 
 void audiohw_set_power_mode(int mode)
 {
     cur_power_mode = mode;
-    set_ak_freqmode();
+
+    if(cur_audio_source == AUDIO_SRC_PLAYBACK)
+        set_ak_freqmode();
+}
+
+static int round_step_up(int x, int step)
+{
+    int rem = x % step;
+    if(rem > 0)
+        rem -= step;
+    return x - rem;
+}
+
+void audiohw_set_recvol(int left, int right, int type)
+{
+    (void)right;
+
+    if(type == AUDIO_GAIN_MIC) {
+        cur_recvol = left;
+
+        if(cur_audio_source == AUDIO_SRC_MIC) {
+            int mic_gain = round_step_up(left, X1000_ICODEC_MIC_GAIN_STEP);
+            mic_gain = MIN(mic_gain, X1000_ICODEC_MIC_GAIN_MAX);
+            mic_gain = MAX(mic_gain, X1000_ICODEC_MIC_GAIN_MIN);
+
+            int adc_gain = left - mic_gain;
+            adc_gain = MIN(adc_gain, X1000_ICODEC_ADC_GAIN_MAX);
+            adc_gain = MAX(adc_gain, X1000_ICODEC_ADC_GAIN_MIN);
+
+            x1000_icodec_adc_gain(adc_gain);
+            x1000_icodec_mic1_gain(mic_gain);
+        }
+    }
 }
 
 void ak4376_set_pdn_pin(int level)