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/****************************************************************************
* drivers/audio/vs1053.c
*
* Audio device driver for VLSI Solutions VS1053 Audio codec.
*
* Copyright (C) 2013 Ken Pettit. All rights reserved.
* Author: Ken Pettit <pettitkd@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/audio.h>
/****************************************************************************
* Private Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct vs1053_struct_s
{
FAR struct audio_lowerhalf_s lower; /* We derive the Audio lower half */
/* Our specific driver data goes here */
int spidevice; /* Placeholder device data */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
FAR struct audio_caps_s *pCaps);
static int vs1053_configure(FAR struct audio_lowerhalf_s *lower,
FAR const struct audio_caps_s *pCaps);
static int vs1053_shutdown(FAR struct audio_lowerhalf_s *lower);
static int vs1053_start(FAR struct audio_lowerhalf_s *lower);
static int vs1053_stop(FAR struct audio_lowerhalf_s *lower);
static int vs1053_enqueuebuffer(FAR struct audio_lowerhalf_s *lower,
FAR struct ap_buffer_s *apb);
static int vs1053_ioctl(FAR struct audio_lowerhalf_s *lower, int cmd,
unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct audio_ops_s g_audioops =
{
vs1053_getcaps, /* getcaps */
vs1053_configure, /* configure */
vs1053_shutdown, /* shutdown */
vs1053_start, /* start */
vs1053_stop, /* stop */
vs1053_enqueuebuffer, /* enqueue_buffer */
vs1053_ioctl /* ioctl */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: vs1053_getcaps
*
* Description: Get the audio device capabilities
*
****************************************************************************/
static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
FAR struct audio_caps_s *pCaps)
{
audvdbg("Entry\n");
return OK;
}
/****************************************************************************
* Name: vs1053_configure
*
* Description: Configure the audio device for the specified mode of
* operation.
*
****************************************************************************/
static int vs1053_configure(FAR struct audio_lowerhalf_s *lower,
FAR const struct audio_caps_s *pCaps)
{
audvdbg("Entry\n");
return OK;
}
/****************************************************************************
* Name: vs1053_shutdown
*
* Description: Shutdown the VS1053 chip and put it in the lowest power
* state possible.
*
****************************************************************************/
static int vs1053_shutdown(FAR struct audio_lowerhalf_s *lower)
{
audvdbg("Entry\n");
return OK;
}
/****************************************************************************
* Name: vs1053_start
*
* Description: Start the configured operation (audio streaming, volume
* enabled, etc.).
*
****************************************************************************/
static int vs1053_start(FAR struct audio_lowerhalf_s *lower)
{
//struct vs1053_struct_s *dev = (struct vs1053_struct_s *) lower;
/* Perform the start */
return OK;
}
/****************************************************************************
* Name: vs1053_stop
*
* Description: Stop the configured operation (audio streaming, volume
* disabled, etc.).
*
****************************************************************************/
static int vs1053_stop(FAR struct audio_lowerhalf_s *lower)
{
/* Stop all audio streaming */
return OK;
}
/****************************************************************************
* Name: vs1053_enqueuebuffer
*
* Description: Enqueue an Audio Pipeline Buffer for playback/ processing.
*
****************************************************************************/
static int vs1053_enqueuebuffer(FAR struct audio_lowerhalf_s *lower,
FAR struct ap_buffer_s *apb )
{
return OK;
}
/****************************************************************************
* Name: vs1053_ioctl
*
* Description: Perform a device ioctl
*
****************************************************************************/
static int vs1053_ioctl(FAR struct audio_lowerhalf_s *lower, int cmd,
unsigned long arg)
{
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: vs1053_initialize
*
* Description:
* Initialize the VS1053 device
*
* Input Parameters:
* spidevice - This is a placeholder argument until the Audio interface
* has been flushed out a bit.
*
****************************************************************************/
struct audio_lowerhalf_s *vs1053_initialize(int spidevice)
{
struct vs1053_struct_s *dev;
/* Sanity check */
#ifdef CONFIG_DEBUG
if (spidevice < 0 || spidevice > 3)
{
return NULL;
}
#endif
/* Allocate a VS1053 device structure */
dev = (struct vs1053_struct_s *)kmalloc(sizeof(struct vs1053_struct_s));
if (dev)
{
/* Initialize the SMART device structure */
dev->lower.ops = &g_audioops;
/* Save our specific device data */
dev->spidevice = spidevice;
}
return &dev->lower;
}
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