3e7a09cb0d
What works:
- LCD: 16-bit RGB565
- all buttons, including scrollwheel
- SD Card
- Battery level and charging/not charging status
- USB
- audio
- sample rate switching
- HP / LO detect, with "safe" fixed LO volume -
LO volume will only be put to user-defined max volume
if headphones are not present.
- rtc
- Plugins build, tried a couple and they seem OK
- Bootloader, installable to nand via usbboot
What doesn't work:
- Dual Boot
- power on/off has intermittent, low volume audio click
(sometimes it's completely silent, sometimes there's
a click)
- Audio uses 16-bit volume scaling, so clicking/popping
is pretty bad at lower volumes - need 32 bit volume
scaling, 24 bit I2S data
- USB HID keys not yet defined
- no jztool support
Unknowns:
- Stereo Switch pins: Direction select, AC_DC
(probably not even hooked up)
- What is the actual purpose of the Stereo Swtich?
- How does the bluetooth module connect?
"Someday" stuff:
- get LCD working at higher bit depth
- Bluetooth
Change-Id: I70dda8fc092c6e3f4352f2245e4164193f803c33
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2021 Aidan MacDonald, Dana Conrad
|
|
*
|
|
* 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 "audiohw.h"
|
|
#include "system.h"
|
|
#include "pcm_sampr.h"
|
|
#include "aic-x1000.h"
|
|
#include "i2c-x1000.h"
|
|
#include "gpio-x1000.h"
|
|
#include "logf.h"
|
|
|
|
/* Audio path appears to be:
|
|
* DAC --> HP Amp --> Stereo Switch --> HP OUT
|
|
* \--> LO OUT
|
|
*
|
|
* The real purpose of the Stereo Switch is not clear.
|
|
* It appears to switch sources between the HP amp and something,
|
|
* likely something unimplemented. */
|
|
|
|
void audiohw_init(void)
|
|
{
|
|
/* explicitly mute everything */
|
|
gpio_set_level(GPIO_MAX97220_SHDN, 0);
|
|
gpio_set_level(GPIO_ISL54405_MUTE, 1);
|
|
gpio_set_level(GPIO_PCM5102A_XMIT, 0);
|
|
|
|
aic_set_external_codec(true);
|
|
aic_set_i2s_mode(AIC_I2S_MASTER_MODE);
|
|
audiohw_set_frequency(HW_FREQ_48);
|
|
|
|
aic_enable_i2s_master_clock(true);
|
|
aic_enable_i2s_bit_clock(true);
|
|
|
|
mdelay(10);
|
|
|
|
/* power on DAC and HP Amp */
|
|
gpio_set_level(GPIO_PCM5102A_ANALOG_PWR, 1);
|
|
gpio_set_level(GPIO_MAX97220_POWER, 1);
|
|
}
|
|
|
|
void audiohw_postinit(void)
|
|
{
|
|
/* unmute - attempt to make power-on pop-free */
|
|
gpio_set_level(GPIO_ISL54405_SEL, 0);
|
|
gpio_set_level(GPIO_MAX97220_SHDN, 1);
|
|
mdelay(10);
|
|
gpio_set_level(GPIO_PCM5102A_XMIT, 1);
|
|
mdelay(10);
|
|
gpio_set_level(GPIO_ISL54405_MUTE, 0);
|
|
}
|
|
|
|
/* TODO: get shutdown just right according to dac datasheet */
|
|
void audiohw_close(void)
|
|
{
|
|
/* mute - attempt to make power-off pop-free */
|
|
gpio_set_level(GPIO_ISL54405_MUTE, 1);
|
|
mdelay(10);
|
|
gpio_set_level(GPIO_PCM5102A_XMIT, 0);
|
|
mdelay(10);
|
|
gpio_set_level(GPIO_MAX97220_SHDN, 0);
|
|
}
|
|
|
|
void audiohw_set_frequency(int fsel)
|
|
{
|
|
int sampr = hw_freq_sampr[fsel];
|
|
int mult = 256;
|
|
|
|
aic_enable_i2s_bit_clock(false);
|
|
aic_set_i2s_clock(X1000_CLK_SCLK_A, sampr, mult);
|
|
aic_enable_i2s_bit_clock(true);
|
|
}
|
|
|