381 lines
12 KiB
C
381 lines
12 KiB
C
/****************************************************************************
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* drivers/audio/vs1053.c
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*
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* Audio device driver for VLSI Solutions VS1053 Audio codec.
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*
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* Copyright (C) 2013 Ken Pettit. All rights reserved.
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* Author: Ken Pettit <pettitkd@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/ioctl.h>
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#include <nuttx/audio/audio.h>
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#include <nuttx/audio/vs1053.h>
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#include "vs1053.h"
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/****************************************************************************
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* Private Definitions
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****************************************************************************/
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#ifndef CONFIG_VS1053_SPIMODE
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# define CONFIG_VS1053_SPIMODE SPIDEV_MODE0
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct vs1053_struct_s
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{
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FAR struct audio_lowerhalf_s lower; /* We derive the Audio lower half */
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/* Our specific driver data goes here */
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FAR struct spi_dev_s *spi; /* Pointer to the SPI bus */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
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FAR struct audio_caps_s *pCaps);
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static int vs1053_configure(FAR struct audio_lowerhalf_s *lower,
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FAR const struct audio_caps_s *pCaps, audio_callback_t upper,
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FAR void *priv);
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static int vs1053_shutdown(FAR struct audio_lowerhalf_s *lower);
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static int vs1053_start(FAR struct audio_lowerhalf_s *lower);
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static int vs1053_stop(FAR struct audio_lowerhalf_s *lower);
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static int vs1053_enqueuebuffer(FAR struct audio_lowerhalf_s *lower,
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FAR struct ap_buffer_s *apb);
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static int vs1053_cancelbuffer(FAR struct audio_lowerhalf_s *lower,
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FAR struct ap_buffer_s *apb);
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static int vs1053_ioctl(FAR struct audio_lowerhalf_s *lower, int cmd,
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unsigned long arg);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct audio_ops_s g_audioops =
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{
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vs1053_getcaps, /* getcaps */
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vs1053_configure, /* configure */
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vs1053_shutdown, /* shutdown */
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vs1053_start, /* start */
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vs1053_stop, /* stop */
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vs1053_enqueuebuffer, /* enqueue_buffer */
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vs1053_cancelbuffer, /* cancel_buffer */
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vs1053_ioctl /* ioctl */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/************************************************************************************
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* Name: vs1053_spi_lock
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************************************************************************************/
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static void vs1053_spi_lock(FAR struct spi_dev_s *dev)
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{
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/* On SPI busses where there are multiple devices, it will be necessary to
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* lock SPI to have exclusive access to the busses for a sequence of
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* transfers. The bus should be locked before the chip is selected.
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*
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* This is a blocking call and will not return until we have exclusiv access to
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* the SPI buss. We will retain that exclusive access until the bus is unlocked.
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*/
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(void)SPI_LOCK(dev, true);
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/* After locking the SPI bus, the we also need call the setfrequency, setbits, and
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* setmode methods to make sure that the SPI is properly configured for the device.
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* If the SPI buss is being shared, then it may have been left in an incompatible
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* state.
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*/
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SPI_SETMODE(dev, CONFIG_VS1053_SPIMODE);
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SPI_SETBITS(dev, 8);
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(void)SPI_SETFREQUENCY(dev, 20000000);
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}
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/************************************************************************************
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* Name: vs1053_spi_unlock
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************************************************************************************/
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static inline void vs1053_spi_unlock(FAR struct spi_dev_s *dev)
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{
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(void)SPI_LOCK(dev, false);
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}
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/************************************************************************************
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* Name: vs1053_readreg - Read the specified 16-bit register from the
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* VS1053 device. Caller must hold the SPI lock.
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************************************************************************************/
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static uint16_t vs1053_readreg(FAR struct vs1053_struct_s *dev, uint16_t reg)
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{
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uint16_t ret;
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FAR struct spi_dev_s *spi = dev->spi;
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/* Select the AUDIO_CTRL device on the SPI bus */
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SPI_SELECT(spi, SPIDEV_AUDIO_CTRL, true);
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/* Send the WRITE command followed by the address */
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SPI_SEND(spi, VS1053_OPCODE_READ);
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SPI_SEND(spi, reg);
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/* Now read the 16-bit value */
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ret = SPI_SEND(spi, 0xFF) << 8;
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ret |= SPI_SEND(spi, 0xFF);
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/* Deselect the CODEC */
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SPI_SELECT(spi, SPIDEV_AUDIO_CTRL, false);
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return ret;
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}
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/****************************************************************************
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* Name: vs1053_getcaps
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*
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* Description: Get the audio device capabilities
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*
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****************************************************************************/
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static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
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FAR struct audio_caps_s *pCaps)
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{
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audvdbg("Entry\n");
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_configure
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*
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* Description: Configure the audio device for the specified mode of
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* operation.
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*
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****************************************************************************/
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static int vs1053_configure(FAR struct audio_lowerhalf_s *lower,
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FAR const struct audio_caps_s *pCaps, audio_callback_t upper,
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FAR void *priv)
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{
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audvdbg("Entry\n");
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/* Save the binding to the upper level operations and private data */
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lower->upper = upper;
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lower->priv = priv;
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/* Now process the configure operation */
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_shutdown
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*
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* Description: Shutdown the VS1053 chip and put it in the lowest power
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* state possible.
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*
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****************************************************************************/
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static int vs1053_shutdown(FAR struct audio_lowerhalf_s *lower)
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{
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audvdbg("Entry\n");
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_start
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*
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* Description: Start the configured operation (audio streaming, volume
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* enabled, etc.).
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*
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****************************************************************************/
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static int vs1053_start(FAR struct audio_lowerhalf_s *lower)
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{
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//struct vs1053_struct_s *dev = (struct vs1053_struct_s *) lower;
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/* Perform the start */
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_stop
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*
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* Description: Stop the configured operation (audio streaming, volume
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* disabled, etc.).
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*
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****************************************************************************/
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static int vs1053_stop(FAR struct audio_lowerhalf_s *lower)
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{
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/* Stop all audio streaming */
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_enqueuebuffer
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*
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* Description: Enqueue an Audio Pipeline Buffer for playback/ processing.
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*
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****************************************************************************/
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static int vs1053_enqueuebuffer(FAR struct audio_lowerhalf_s *lower,
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FAR struct ap_buffer_s *apb )
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{
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_cancelbuffer
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*
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* Description: Called when an enqueued buffer is being cancelled.
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*
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****************************************************************************/
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static int vs1053_cancelbuffer(FAR struct audio_lowerhalf_s *lower,
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FAR struct ap_buffer_s *apb )
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{
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return OK;
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}
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/****************************************************************************
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* Name: vs1053_ioctl
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*
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* Description: Perform a device ioctl
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*
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****************************************************************************/
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static int vs1053_ioctl(FAR struct audio_lowerhalf_s *lower, int cmd,
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unsigned long arg)
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{
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: vs1053_initialize
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*
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* Description:
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* Initialize the VS1053 device
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*
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* Input Parameters:
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* spidevice - This is a placeholder argument until the Audio interface
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* has been flushed out a bit.
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*
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****************************************************************************/
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struct audio_lowerhalf_s *vs1053_initialize(FAR struct spi_dev_s *spi,
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FAR const struct vs1053_lower_s *lower,
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unsigned int devno)
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{
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struct vs1053_struct_s *dev;
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uint16_t status;
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uint8_t id;
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/* Sanity check */
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DEBUGASSERT(spi != NULL);
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DEBUGASSERT(lower != NULL);
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DEBUGASSERT(lower->reset != NULL);
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/* Allocate a VS1053 device structure */
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dev = (struct vs1053_struct_s *)kmalloc(sizeof(struct vs1053_struct_s));
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if (dev)
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{
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/* Initialize the SMART device structure */
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dev->lower.ops = &g_audioops;
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dev->lower.upper = NULL;
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dev->lower.priv = NULL;
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/* Save our specific device data */
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dev->spi = spi;
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/* Reset the VS1053 chip */
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lower->reset(lower, false);
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up_udelay(4000);
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lower->reset(lower, true);
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/* Do device detection to validate the chip is there.
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* We have to hold the SPI lock during reads / writes.
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*/
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vs1053_spi_lock(spi);
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status = vs1053_readreg(dev, VS1053_SCI_STATUS);
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vs1053_spi_unlock(spi);
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id = (status & VS1053_SS_VER) >> VS1053_VER_SHIFT;
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if (id != VS1053_VER_VS1053)
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{
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auddbg("Unexpected VER bits: 0x%0X\n", id);
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}
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}
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return &dev->lower;
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}
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