160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 and 2009 by Karl Kurbjun
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdlib.h>
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#include "system.h"
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#include "kernel.h"
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#include "logf.h"
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#include "audio.h"
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#include "sound.h"
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#include "file.h"
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#include "dsp-target.h"
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#include "dsp/ipc.h"
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#include "mmu-arm.h"
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#include "pcm-internal.h"
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/* This is global to save some latency when pcm_play_dma_get_peak_buffer is
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* called.
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*/
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static const void *start;
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void pcm_play_dma_postinit(void)
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{
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/* Configure clock divider */
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tsc2100_writereg(CONTROL_PAGE2, TSPP1_ADDRESS, 0x1120);
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tsc2100_writereg(CONTROL_PAGE2, TSAC3_ADDRESS, 0x0800);
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tsc2100_writereg(CONTROL_PAGE2, TSCPC_ADDRESS, 0x3B00);
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tsc2100_writereg(CONTROL_PAGE2, TSAC1_ADDRESS, 0x0300);
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tsc2100_writereg(CONTROL_PAGE2, TSCSC_ADDRESS, 0xC580);
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audiohw_postinit();
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}
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void pcm_play_dma_init(void)
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{
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IO_INTC_IRQ0 = INTR_IRQ0_IMGBUF;
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bitset16(&IO_INTC_EINT0, INTR_EINT0_IMGBUF);
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/* Set this as a FIQ */
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bitset16(&IO_INTC_FISEL0, INTR_EINT0_IMGBUF);
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/* Enable the HPIB clock */
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bitset16(&IO_CLK_MOD0, (CLK_MOD0_HPIB | CLK_MOD0_DSP));
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IO_SDRAM_SDDMASEL = 0x24;
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IO_DSPC_HPIB_CONTROL = 1 << 10 | 1 << 9 | 1 << 8 | 1 << 7 | 1 << 3 | 1 << 0;
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dsp_reset();
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dsp_load(dsp_image);
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DSP_(_dma0_stopped)=1;
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dsp_wake();
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}
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void pcm_dma_apply_settings(void)
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{
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audiohw_set_frequency(pcm_fsel);
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}
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/* Note that size is actually limited to the size of a short right now due to
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* the implementation on the DSP side (and the way that we access it)
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*/
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void pcm_play_dma_start(const void *addr, size_t size)
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{
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unsigned long sdem_addr=(unsigned long)addr - CONFIG_SDRAM_START;
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/* Initialize codec. */
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DSP_(_sdem_addrl) = sdem_addr & 0xffff;
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DSP_(_sdem_addrh) = sdem_addr >> 16;
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DSP_(_sdem_dsp_size) = size;
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DSP_(_dma0_stopped)=0;
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dsp_wake();
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}
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void pcm_play_dma_stop(void)
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{
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DSP_(_dma0_stopped)=1;
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dsp_wake();
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}
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void pcm_play_lock(void)
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{
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}
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void pcm_play_unlock(void)
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{
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}
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/* Only used when debugging */
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static char buffer[80];
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void DSPHINT(void) __attribute__ ((section(".icode")));
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void DSPHINT(void)
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{
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unsigned int i;
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size_t size;
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IO_INTC_FIQ0 = INTR_IRQ0_IMGBUF;
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switch (dsp_message.msg)
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{
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case MSG_DEBUGF:
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/* DSP stores one character per word. */
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for (i = 0; i < sizeof(buffer); i++)
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{
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buffer[i] = dsp_message.payload.debugf.buffer[i];
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}
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DEBUGF("DSP: %s", buffer);
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break;
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case MSG_REFILL:
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/* Buffer empty. Try to get more. */
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if (pcm_play_dma_complete_callback(PCM_DMAST_OK, &start, &size))
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{
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unsigned long sdem_addr=(unsigned long)start - CONFIG_SDRAM_START;
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/* Flush any pending cache writes */
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commit_dcache_range(start, size);
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/* set the new DMA values */
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DSP_(_sdem_addrl) = sdem_addr & 0xffff;
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DSP_(_sdem_addrh) = sdem_addr >> 16;
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DSP_(_sdem_dsp_size) = size;
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DEBUGF("pcm_sdram at 0x%08lx, sdem_addr 0x%08lx",
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(unsigned long)start, (unsigned long)sdem_addr);
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pcm_play_dma_status_callback(PCM_DMAST_STARTED);
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}
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break;
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default:
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DEBUGF("DSP: unknown msg 0x%04x", dsp_message.msg);
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break;
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}
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/* Re-Activate the channel */
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dsp_wake();
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DEBUGF("DSP: %s", buffer);
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}
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