1 files changed, 247 insertions, 0 deletions

diff --git a/firmware/drivers/audio/aic3x.c b/firmware/drivers/audio/aic3x.c
new file mode 100644
index 0000000000..3284326565
--- /dev/null
+++ b/firmware/drivers/audio/aic3x.c
@@ -0,0 +1,247 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "logf.h"
+#include "system.h"
+#include "string.h"
+#include "audio.h"
+
+#ifdef SANSA_CONNECT
+#include "avr-sansaconnect.h"
+#endif
+
+#if CONFIG_I2C == I2C_DM320
+#include "i2c-dm320.h"
+#endif
+#include "audiohw.h"
+
+/* (7-bit) address is 0x18, the LSB is read/write flag */
+#define AIC3X_ADDR (0x18 << 1)
+
+static char volume_left = 0, volume_right = 0;
+
+const struct sound_settings_info audiohw_settings[] = {
+    [SOUND_VOLUME]        = {"dB", 0,  1, VOLUME_MIN/10, VOLUME_MAX/10, -25},
+    /* HAVE_SW_TONE_CONTROLS */
+    [SOUND_BASS]          = {"dB", 0,  1, -24,  24,   0},
+    [SOUND_TREBLE]        = {"dB", 0,  1, -24,  24,   0},
+    [SOUND_BALANCE]       = {"%",  0,  1,-100, 100,   0},
+    [SOUND_CHANNELS]      = {"",   0,  1,   0,   5,   0},
+    [SOUND_STEREO_WIDTH]  = {"%",  0,  5,   0, 250, 100},
+};
+
+/* convert tenth of dB volume to master volume register value */
+int tenthdb2master(int db)
+{
+    /* 0 to -63.0dB in 1dB steps, aic3x can goto -63.5 in 0.5dB steps */
+    if (db < VOLUME_MIN)
+    {
+        return 0x7E;
+    }
+    else if (db >= VOLUME_MAX)
+    {
+        return 0x00;
+    }
+    else
+    {
+        return (-((db)/5)); /* VOLUME_MIN is negative */
+    }
+}
+
+static void aic3x_write_reg(unsigned reg, unsigned value)
+{
+    unsigned char data[2];
+
+    data[0] = reg;
+    data[1] = value;
+
+#if CONFIG_I2C == I2C_DM320
+    if (i2c_write(AIC3X_ADDR, data, 2) != 0)
+#else
+    #warning Implement aic3x_write_reg()
+#endif
+    {
+        logf("AIC3X error reg=0x%x", reg);
+        return;
+    }
+}
+
+static void aic3x_apply_volume(void)
+{
+    unsigned char data[3];
+
+#if 0 /* handle page switching onve we use first page at all */
+    aic3x_write_reg(0, 0); /* switch to page 0 */
+#endif
+
+    data[0] = AIC3X_LEFT_VOL;
+    data[1] = volume_left;
+    data[2] = volume_right;
+
+    /* use autoincrement write */
+#if CONFIG_I2C == I2C_DM320
+    if (i2c_write(AIC3X_ADDR, data, 3) != 0)
+#else
+    #warning Implement aic3x_apply_volume()
+#endif
+    {
+        logf("AIC3X error in apply volume");
+        return;
+    }
+}
+
+
+static void audiohw_mute(bool mute)
+{
+    if (mute)
+    {
+        volume_left |= 0x80;
+        volume_right |= 0x80;
+    }
+    else
+    {
+        volume_left &= 0x7F;
+        volume_right &= 0x7F;
+    }
+
+    aic3x_apply_volume();
+}
+
+/* public functions */
+
+/**
+ * Init our tlv with default values
+ */
+void audiohw_init(void)
+{
+    logf("AIC3X init");
+
+    /* Do software reset (self-clearing) */
+    aic3x_write_reg(AIC3X_SOFT_RESET, 0x80);
+
+    /* ADC fs = fs(ref)/5.5; DAC fs = fs(ref) */
+    aic3x_write_reg(AIC3X_SMPL_RATE, 0x90);
+
+    /* Enable PLL. Set Q=16, P=1 */
+    aic3x_write_reg(AIC3X_PLL_REG_A, 0x81);
+    /* PLL J = 53 */
+    aic3x_write_reg(AIC3X_PLL_REG_B, 0xD4);
+    /* PLL D = 5211 */
+    aic3x_write_reg(AIC3X_PLL_REG_C, 0x51); 
+    aic3x_write_reg(AIC3X_PLL_REG_D, 0x6C); /* PLL D = 5211 */
+
+    /* Left DAC plays left channel, Right DAC plays right channel */ 
+    aic3x_write_reg(AIC3X_DATAPATH, 0xA);
+
+    /* Audio data interface */
+    /* BCLK and WCLK are outputs (master mode) */
+    aic3x_write_reg(AIC3X_DATA_REG_A, 0xC0);
+    /* right-justified mode */
+    aic3x_write_reg(AIC3X_DATA_REG_B, 0x80);
+    /* data offset = 0 clocks */
+    aic3x_write_reg(AIC3X_DATA_REG_C, 0);
+    
+    /* GPIO1 used for audio serial data bus ADC word clock */
+    aic3x_write_reg(AIC3X_GPIO1_CTRL, 0x10);
+
+    /* power left and right DAC, HPLCOM constant VCM output */
+    aic3x_write_reg(AIC3X_DAC_POWER, 0xD0);
+    /* HPRCOM as constant VCM output. Enable short-circuit protection
+       (limit current) */
+    aic3x_write_reg(AIC3X_HIGH_POWER, 0xC);
+    
+    /* driver power-on time 200 ms, ramp-up step time 4 ms */
+    aic3x_write_reg(AIC3X_POP_REDUCT, 0x7C);
+
+    /* DAC_L1 routed to HPLOUT, volume analog gain 0xC (-6.0dB) */
+    aic3x_write_reg(AIC3X_DAC_L1_VOL, 0x8C);
+    /* HPLOUT output level 0dB, not muted, fully powered up */
+    aic3x_write_reg(AIC3X_HPLOUT_LVL, 0xB);
+
+    /* HPLCOM is muted */
+    aic3x_write_reg(AIC3X_HPLCOM_LVL, 0x7);
+
+    /* DAC_R1 routed to HPROUT, volume analog gain 0xC (-6.0 dB) */
+    aic3x_write_reg(AIC3X_DAC_R1_VOL, 0x8C);
+    /* HPROUT output level 0dB, not muted, fully powered up */
+    aic3x_write_reg(AIC3X_HPROUT_LVL, 0xB);
+
+    /* DAC_L1 routed to MONO_LOP/M, gain 0x2 (-1.0dB) */
+    aic3x_write_reg(AIC3X_DAC_L1_MONO_LOP_M_VOL, 0x92);
+    /* DAC_R1 routed to MONO_LOP/M, gain 0x2 (-1.0dB) */
+    aic3x_write_reg(AIC3X_DAC_R1_MONO_LOP_M_VOL, 0x92);
+    
+    /* MONO_LOP output level 6dB, not muted, fully powered up */
+    aic3x_write_reg(AIC3X_MONO_LOP_M_LVL, 0x6b);
+
+    /* DAC_L1 routed to LEFT_LOP/M */
+    aic3x_write_reg(AIC3X_DAC_L1_LEFT_LOP_M_VOL, 0x80);
+    /* LEFT_LOP/M output level 0dB, not muted */
+    aic3x_write_reg(AIC3X_LEFT_LOP_M_LVL, 0xB);
+
+    /* DAC_R1 routed to RIGHT_LOP/M */
+    aic3x_write_reg(AIC3X_DAC_R1_RIGHT_LOP_M_VOL, 0x80);
+    /* RIGHT_LOP/M output level 0dB, not muted */
+    aic3x_write_reg(AIC3X_RIGHT_LOP_M_LVL, 0xB);
+}
+
+void audiohw_postinit(void)
+{
+   audiohw_mute(false);
+
+   /* Power up Left, Right DAC/LOP, HPLOUT and HPROUT */
+   aic3x_write_reg(AIC3X_MOD_POWER, 0xFE);
+}
+
+void audiohw_set_frequency(int fsel)
+{
+    (void)fsel;
+    /* TODO */
+}
+
+void audiohw_set_headphone_vol(int vol_l, int vol_r)
+{
+    if ((volume_left & 0x7F) == (vol_l & 0x7F) &&
+        (volume_right & 0x7F) == (vol_r & 0x7F))
+    {
+        /* Volume already set to this value */
+        return;
+    }
+
+    volume_left &= 0x80; /* preserve mute bit */
+    volume_left |= (vol_l & 0x7F); /* set gain */
+
+    volume_right &= 0x80; /* preserve mute bit */
+    volume_right |= (vol_r & 0x7F); /* set gain */
+
+    aic3x_apply_volume();
+}
+
+/* Nice shutdown of AIC3X codec */
+void audiohw_close(void)
+{
+    audiohw_mute(true);
+#ifdef SANSA_CONNECT
+    avr_hid_reset_codec();
+#endif
+}
+
+