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Diffstat (limited to 'nuttx/drivers/audio/vs1053.c')
| -rw-r--r-- | nuttx/drivers/audio/vs1053.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/nuttx/drivers/audio/vs1053.c b/nuttx/drivers/audio/vs1053.c new file mode 100644 index 000000000..6f143acf9 --- /dev/null +++ b/nuttx/drivers/audio/vs1053.c @@ -0,0 +1,257 @@ +/**************************************************************************** + * 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; +} |