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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald
*
* 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 "system.h"
#include "kernel.h"
#include "audio.h"
#include "audiohw.h"
#include "pcm.h"
#include "pcm-internal.h"
#include "panic.h"
#include "dma-x1000.h"
#include "irq-x1000.h"
#include "x1000/aic.h"
#include "x1000/cpm.h"
#define AIC_STATE_STOPPED 0
#define AIC_STATE_PLAYING 1
volatile unsigned aic_tx_underruns = 0;
static int aic_state = AIC_STATE_STOPPED;
static int aic_lock = 0;
static volatile int aic_dma_pending_event = DMA_EVENT_NONE;
static dma_desc aic_dma_desc;
static void pcm_play_dma_int_cb(int event);
#ifdef HAVE_RECORDING
static void pcm_rec_dma_int_cb(int event);
#endif
void pcm_play_dma_init(void)
{
/* Ungate clock, assign pins. NB this overlaps with pins labeled "sa0-sa4"
* on Ingenic's datasheets but I'm not sure what they are. Probably safe to
* assume they are not useful to Rockbox... */
jz_writef(CPM_CLKGR, AIC(0));
/* Configure AIC with some sane defaults */
jz_writef(AIC_CFG, RST(1));
jz_writef(AIC_I2SCR, STPBK(1));
jz_writef(AIC_CFG, MSB(0), LSMP(0), ICDC(0), AUSEL(1), BCKD(0), SYNCD(0));
jz_writef(AIC_CCR, ENDSW(0), ASVTSU(0));
jz_writef(AIC_I2SCR, RFIRST(0), ESCLK(0), AMSL(0));
jz_write(AIC_SPENA, 0);
/* Let the target initialize its hardware and setup the AIC */
audiohw_init();
#if (PCM_NATIVE_BITDEPTH > 16)
/* Program audio format (stereo, 24 bit samples) */
jz_writef(AIC_CCR, PACK16(0), CHANNEL_V(STEREO),
OSS_V(24BIT), ISS_V(24BIT), M2S(0));
jz_writef(AIC_I2SCR, SWLH(0));
#else
/* Program audio format (stereo, packed 16 bit samples) */
jz_writef(AIC_CCR, PACK16(1), CHANNEL_V(STEREO),
OSS_V(16BIT), ISS_V(16BIT), M2S(0));
jz_writef(AIC_I2SCR, SWLH(0));
#endif
/* Set DMA settings */
jz_writef(AIC_CFG, TFTH(16), RFTH(16));
dma_set_callback(DMA_CHANNEL_AUDIO, pcm_play_dma_int_cb);
#ifdef HAVE_RECORDING
dma_set_callback(DMA_CHANNEL_RECORD, pcm_rec_dma_int_cb);
#endif
/* Mask all interrupts and disable playback/recording */
jz_writef(AIC_CCR, EROR(0), ETUR(0), ERFS(0), ETFS(0),
ENLBF(0), ERPL(0), EREC(0));
/* Enable the controller */
jz_writef(AIC_CFG, ENABLE(1));
/* Enable interrupts */
system_enable_irq(IRQ_AIC);
}
void pcm_play_dma_postinit(void)
{
audiohw_postinit();
}
void pcm_dma_apply_settings(void)
{
audiohw_set_frequency(pcm_fsel);
}
static void pcm_dma_start(const void* addr, size_t size)
{
aic_dma_desc.cm = jz_orf(DMA_CHN_CM, SAI(1), DAI(0), RDIL(9),
SP_V(32BIT), DP_V(32BIT), TSZ_V(AUTO),
STDE(0), TIE(1), LINK(0));
aic_dma_desc.sa = PHYSADDR(addr);
aic_dma_desc.ta = PHYSADDR(JA_AIC_DR);
aic_dma_desc.tc = size;
aic_dma_desc.sd = 0;
aic_dma_desc.rt = jz_orf(DMA_CHN_RT, TYPE_V(I2S_TX));
aic_dma_desc.pad0 = 0;
aic_dma_desc.pad1 = 0;
commit_dcache_range(&aic_dma_desc, sizeof(dma_desc));
commit_dcache_range(addr, size);
REG_DMA_CHN_DA(DMA_CHANNEL_AUDIO) = PHYSADDR(&aic_dma_desc);
jz_writef(DMA_CHN_CS(DMA_CHANNEL_AUDIO), DES8(1), NDES(0));
jz_set(DMA_DB, 1 << DMA_CHANNEL_AUDIO);
jz_writef(DMA_CHN_CS(DMA_CHANNEL_AUDIO), CTE(1));
pcm_play_dma_status_callback(PCM_DMAST_STARTED);
}
static void pcm_dma_handle_event(int event)
{
if(event == DMA_EVENT_COMPLETE) {
const void* addr;
size_t size;
if(pcm_play_dma_complete_callback(PCM_DMAST_OK, &addr, &size))
pcm_dma_start(addr, size);
} else if(event == DMA_EVENT_NONE) {
/* ignored, so callers don't need to check for this */
} else {
pcm_play_dma_status_callback(PCM_DMAST_ERR_DMA);
}
}
static void pcm_play_dma_int_cb(int event)
{
if(aic_lock) {
aic_dma_pending_event = event;
return;
} else {
pcm_dma_handle_event(event);
}
}
void pcm_play_dma_start(const void* addr, size_t size)
{
aic_dma_pending_event = DMA_EVENT_NONE;
aic_state = AIC_STATE_PLAYING;
pcm_dma_start(addr, size);
jz_writef(AIC_CCR, TDMS(1), ETUR(1), ERPL(1));
}
void pcm_play_dma_stop(void)
{
jz_writef(AIC_CCR, TDMS(0), ETUR(0), ERPL(0));
jz_writef(AIC_CCR, TFLUSH(1));
aic_dma_pending_event = DMA_EVENT_NONE;
aic_state = AIC_STATE_STOPPED;
}
void pcm_play_lock(void)
{
++aic_lock;
}
void pcm_play_unlock(void)
{
int irq = disable_irq_save();
if(--aic_lock == 0 && aic_state == AIC_STATE_PLAYING) {
pcm_dma_handle_event(aic_dma_pending_event);
aic_dma_pending_event = DMA_EVENT_NONE;
}
restore_irq(irq);
}
#ifdef HAVE_RECORDING
/*
* Recording
*/
/* FIXME need to implement this!! */
static void pcm_rec_dma_int_cb(int event)
{
(void)event;
}
void pcm_rec_dma_init(void)
{
}
void pcm_rec_dma_close(void)
{
}
void pcm_rec_dma_start(void* addr, size_t size)
{
(void)addr;
(void)size;
}
void pcm_rec_dma_stop(void)
{
}
void pcm_rec_lock(void)
{
}
void pcm_rec_unlock(void)
{
}
const void* pcm_rec_dma_get_peak_buffer(void)
{
return NULL;
}
void audio_set_output_source(int source)
{
(void)source;
}
void audio_input_mux(int source, unsigned flags)
{
(void)source;
(void)flags;
}
#endif /* HAVE_RECORDING */
void AIC(void)
{
if(jz_readf(AIC_SR, TUR)) {
aic_tx_underruns += 1;
jz_writef(AIC_SR, TUR(0));
}
}
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