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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdbool.h>
#include "config.h"
#include "debug.h"
#include "panic.h"
#include <kernel.h>
#include "pcm_playback.h"
#ifndef SIMULATOR
#include "cpu.h"
#include "i2c.h"
#include "uda1380.h"
#include "system.h"
#endif
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "lcd.h"
#include "button.h"
#include "file.h"
#include "buffer.h"
#include "sprintf.h"
#include "button.h"
#include <string.h>
static bool pcm_playing;
static bool pcm_paused;
static int pcm_freq = 0x6; /* 44.1 is default */
/* Set up the DMA transfer that kicks in when the audio FIFO gets empty */
static void dma_start(const void *addr, long size)
{
pcm_playing = true;
addr = (void *)((unsigned long)addr & ~3); /* Align data */
size &= ~3; /* Size must be multiple of 4 */
/* Reset the audio FIFO */
IIS2CONFIG = 0x800;
/* Set up DMA transfer */
SAR0 = ((unsigned long)addr); /* Source address */
DAR0 = (unsigned long)&PDOR3; /* Destination address */
BCR0 = size; /* Bytes to transfer */
/* Enable the FIFO and force one write to it */
IIS2CONFIG = (pcm_freq << 12) | 0x300;
DCR0 = DMA_INT | DMA_EEXT | DMA_CS | DMA_SINC | DMA_START;
}
/* Stops the DMA transfer and interrupt */
static void dma_stop(void)
{
pcm_playing = false;
/* Reset the FIFO */
IIS2CONFIG = 0x800;
}
/* set volume of the main channel */
void pcm_set_volume(int volume)
{
if(volume > 0)
{
uda1380_mute(0);
uda1380_setvol(0xff - volume);
}
else
{
uda1380_mute(1);
}
}
/* sets frequency of input to DAC */
void pcm_set_frequency(unsigned int frequency)
{
switch(frequency)
{
case 11025:
pcm_freq = 0x2;
break;
case 22050:
pcm_freq = 0x4;
break;
case 44100:
pcm_freq = 0x6;
break;
default:
pcm_freq = 0x6;
break;
}
}
/* the registered callback function to ask for more mp3 data */
static void (*callback_for_more)(unsigned char**, long*) = NULL;
void pcm_play_data(const unsigned char* start, int size,
void (*get_more)(unsigned char** start, long* size))
{
callback_for_more = get_more;
dma_start(start, size);
}
void pcm_play_stop(void)
{
dma_stop();
}
void pcm_play_pause(bool play)
{
if(pcm_paused && play)
{
/* Enable the FIFO and force one write to it */
IIS2CONFIG = (pcm_freq << 12) | 0x300;
DCR0 |= DMA_START;
pcm_paused = false;
}
else if(!pcm_paused && !play)
{
IIS2CONFIG = 0x800;
pcm_paused = true;
}
}
bool pcm_is_playing(void)
{
return pcm_playing;
}
/* DMA0 Interrupt is called when the DMA has finished transfering a chunk */
void DMA0(void) __attribute__ ((interrupt_handler, section(".icode")));
void DMA0(void)
{
unsigned char* start;
long size = 0;
int res = DSR0;
DSR0 = 1; /* Clear interrupt */
/* Stop on error */
if(res & 0x70)
{
dma_stop();
}
else
{
if (callback_for_more)
{
callback_for_more(&start, &size);
}
if(size)
{
SAR0 = (unsigned long)start; /* Source address */
BCR0 = size; /* Bytes to transfer */
}
else
{
/* Finished playing */
dma_stop();
}
}
IPR |= (1<<14); /* Clear pending interrupt request */
}
void pcm_init(void)
{
pcm_playing = false;
pcm_paused = false;
uda1380_init();
BUSMASTER_CTRL = 0x81; /* PARK[1,0]=10 + BCR24BIT */
DIVR0 = 54; /* DMA0 is mapped into vector 54 in system.c */
DMAROUTE = (DMAROUTE & 0xffffff00) | DMA0_REQ_AUDIO_1;
DMACONFIG = 1; /* DMA0Req = PDOR3 */
/* Reset the audio FIFO */
IIS2CONFIG = 0x800;
/* Enable interrupt at level 7, priority 0 */
ICR4 = (ICR4 & 0xffff00ff) | 0x00001c00;
IMR &= ~(1<<14); /* bit 14 is DMA0 */
pcm_set_frequency(44100);
}
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