drivers/audio/cxd56.h - nuttx - Git at Google

 /****************************************************************************
  * drivers/audio/cxd56.h
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The
  * ASF licenses this file to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance with the
  * License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
  * License for the specific language governing permissions and limitations
  * under the License.
  *
  ****************************************************************************/

 #ifndef __DRIVERS_AUDIO_CXD56_H
 #define __DRIVERS_AUDIO_CXD56_H

 /****************************************************************************
  * Included Files
  ****************************************************************************/

 #include <pthread.h>
 #include <mqueue.h>

 #include <nuttx/audio/audio.h>
 #include <nuttx/config.h>
 #include <nuttx/compiler.h>
 #include <nuttx/fs/ioctl.h>
 #include <nuttx/spinlock.h>

 #ifdef CONFIG_AUDIO

 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/

 #ifndef CONFIG_CXD56_AUDIO_WORKER_STACKSIZE
 #  define CONFIG_CXD56_AUDIO_WORKER_STACKSIZE  768
 #endif

 #ifndef CONFIG_CXD56_MSG_PRIO
 #  define CONFIG_CXD56_MSG_PRIO  1
 #endif

 #ifdef CONFIG_CXD56_AUDIO_I2S_DEVICE_1_MASTER
 #  define CXD56_I2S1_MODE    0    /* Master */
 #else
 #  define CXD56_I2S1_MODE    1    /* Slave */
 #endif

 #ifdef CONFIG_CXD56_AUDIO_I2S_FORMAT_1_LEFT
 #  define CXD56_I2S1_FORMAT  1    /* Left */
 #else
 #  define CXD56_I2S1_FORMAT  0    /* Normal */
 #endif

 #ifdef CONFIG_CXD56_AUDIO_I2S_BYPASS_MODE_1_ENABLE
 #  define CXD56_I2S1_BYPASS  0    /* Disable */
 #else
 #  define CXD56_I2S1_BYPASS  1    /* Enable */
 #endif

 /* I2S data rate of I2S1 */

 #if defined(CONFIG_CXD56_I2S0)
 #  define CXD56_I2S1_DATA_RATE   CONFIG_CXD56_AUDIO_I2S_RATE_1
 #else
 #  define CXD56_I2S1_DATA_RATE   0
 #endif

 #define CXD56_XTAL_24_576MHZ  0
 #define CXD56_XTAL_49_152MHZ  1

 #ifdef CONFIG_CXD56_AUDIO_XTAL_SEL_49_152MHZ
 #  define CXD56_AUDIO_MCLK   CXD56_XTAL_49_152MHZ
 #else
 #  define CXD56_AUDIO_MCLK   CXD56_XTAL_24_576MHZ
 #endif

 /* Drive strength levels */
 #define CXD56_DS_WEAKEST    1
 #define CXD56_DS_WEAKER     2
 #define CXD56_DS_STRONGER   3
 #define CXD56_DS_STRONGEST  4

 /* Drive strength of global pin output-A */
 #if defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKEST)
 #  define CXD56_GPO_A_DS    CXD56_DS_WEAKEST
 #elif defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKER)
 #  define CXD56_GPO_A_DS    CXD56_DS_WEAKER
 #elif defined(CONFIG_CXD56_AUDIO_GPO_A_STRONGER)
 #  define CXD56_GPO_A_DS    CXD56_DS_STRONGER
 #else
 #  define CXD56_GPO_A_DS    CXD56_DS_STRONGEST
 #endif

 /* Drive strength of D/A converted data */
 #if defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKEST)
 #  define CXD56_DA_DS    CXD56_DS_WEAKEST
 #elif defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKER)
 #  define CXD56_DA_DS    CXD56_DS_WEAKER
 #elif defined(CONFIG_CXD56_AUDIO_DA_DATA_STRONGER)
 #  define CXD56_DA_DS    CXD56_DS_STRONGER
 #else
 #  define CXD56_DA_DS    CXD56_DS_STRONGEST
 #endif

 /* Drive strength of digital mic clock */
 #if defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKEST)
 #  define CXD56_DMIC_CLK_DS    CXD56_DS_WEAKEST
 #elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKER)
 #  define CXD56_DMIC_CLK_DS    CXD56_DS_WEAKER
 #elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_STRONGER)
 #  define CXD56_DMIC_CLK_DS    CXD56_DS_STRONGER
 #else
 #  define CXD56_DMIC_CLK_DS    CXD56_DS_STRONGEST
 #endif

 /* Drive strength of master clock */
 #if defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKEST)
 #  define CXD56_MCLKOUT_DS    CXD56_DS_WEAKEST
 #elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKER)
 #  define CXD56_MCLKOUT_DS    CXD56_DS_WEAKER
 #elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_STRONGER)
 #  define CXD56_MCLKOUT_DS    CXD56_DS_STRONGER
 #else
 #  define CXD56_MCLKOUT_DS    CXD56_DS_STRONGEST
 #endif

 /* Speaker time split on drive */
 #if defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONGEST)
 #  define CXD56_SP_SPLIT_ON    4
 #elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONG)
 #  define CXD56_SP_SPLIT_ON    3
 #elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_SHORT)
 #  define CXD56_SP_SPLIT_ON    2
 #else
 #  define CXD56_SP_SPLIT_ON    1
 #endif

 /* Speaker drive mode */

 #if defined(CONFIG_CXD56_AUDIO_SP_DRV_LINEOUT)
 #  define CXD56_SP_DRIVER   0
 #elif defined(CONFIG_CXD56_AUDIO_SP_DRV_1DRIVERT)
 #  define CXD56_SP_DRIVER   1
 #elif defined(CONFIG_CXD56_AUDIO_SP_DRV_2DRIVERT)
 #  define CXD56_SP_DRIVER   2
 #else
 #  define CXD56_SP_DRIVER   3
 #endif

 /* Mic bias voltage select */

 #define  CXD56_MIC_BIAS_20V  1
 #define  CXD56_MIC_BIAS_28V  2

 #if defined(CONFIG_CXD56_AUDIO_MICBIAS_20V)
 #  define CXD56_MIC_BIAS  CXD56_MIC_BIAS_20V
 #else
 #  define CXD56_MIC_BIAS  CXD56_MIC_BIAS_28V
 #endif

 /* Mic select */

 #define CXD56_AUDIO_CFG_MIC CONFIG_CXD56_AUDIO_MIC_CHANNEL_SEL

 /* Mic boot wait time */

 #if defined(CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT)
 #define CXD56_MIC_BOOT_WAIT  CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT
 #else
 #define CXD56_MIC_BOOT_WAIT  1100
 #endif

 /* CIC filter input path */

 #define CXD56_AUDIO_CFG_CIC_IN_SEL_NONE   0
 #define CXD56_AUDIO_CFG_CIC_IN_SEL_CXD    1
 #define CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF 2

 #if defined(CONFIG_CXD56_AUDIO_CIC_IN_SEL_CXD)
 #  define CXD56_AUDIO_CFG_CIC_IN  CXD56_AUDIO_CFG_CIC_IN_SEL_CXD
 #elif defined (CONFIG_CXD56_AUDIO_CIC_IN_SEL_DMIC)
 #  define CXD56_AUDIO_CFG_CIC_IN  CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF
 #else
 #  define CXD56_AUDIO_CFG_CIC_IN  CXD56_AUDIO_CFG_CIC_IN_SEL_NONE
 #endif

 /* DMA format */

 #define CXD56_DMA_FORMAT_LR 0
 #define CXD56_DMA_FORMAT_RL 1

 #if defined(CONFIG_CXD56_AUDIO_DMA_DATA_FORMAT_LR)
 #  define CXD56_DMA_FORMAT  CXD56_DMA_FORMAT_LR
 #else
 #  define CXD56_DMA_FORMAT  CXD56_DMA_FORMAT_RL
 #endif

 /* Audio buffer configuration */

 #ifndef CONFIG_CXD56_AUDIO_BUFFER_SIZE
 #  define CONFIG_CXD56_AUDIO_BUFFER_SIZE  4096
 #endif

 #ifndef CONFIG_CXD56_AUDIO_NUM_BUFFERS
 #  define CONFIG_CXD56_AUDIO_NUM_BUFFERS  4
 #endif

 /* Queue helpers */

 #define dq_get(q)    (dq_remfirst(q))
 #define dq_put(q,n) (dq_addlast((dq_entry_t*)n,(q)))
 #define dq_put_back(q,n) (dq_addfirst((dq_entry_t*)n,(q)))
 #define dq_clear(q) \
   do \
     { \
       dq_remlast(q); \
     } \
   while (!dq_empty(q))

 /****************************************************************************
  * Public Types
  ****************************************************************************/

 enum cxd56_dmahandle_e
 {
   CXD56_AUDIO_DMA_MIC,
   CXD56_AUDIO_DMA_I2S0_DOWN,
   CXD56_AUDIO_DMA_COUNT
 };
 typedef enum cxd56_dmahandle_e cxd56_dmahandle_t;

 enum cxd56_devstate_e
 {
   CXD56_DEV_STATE_OFF,
   CXD56_DEV_STATE_PAUSED,
   CXD56_DEV_STATE_BUFFERING,
   CXD56_DEV_STATE_STARTED,
   CXD56_DEV_STATE_STOPPED
 };

 struct cxd56_dev_s
 {
   /* We are an audio lower half driver (We are also the upper "half" of
    * the CS43L22 driver with respect to the board lower half driver).
    *
    * Terminology:
    * Our "lower" half audio instances will be called dev for the publicly
    * visible version and "priv" for the version that only this driver
    * knows.  From the point of view of this driver, it is the board lower
    * "half" that is referred to as "lower".
    */

   struct audio_lowerhalf_s dev;             /* CXD56 audio lower half (this device) */

   /* Our specific driver data goes here */

   const FAR struct cxd56_lower_s *lower;    /* Pointer to the board lower functions */
   enum cxd56_devstate_e   state;            /* Driver state */
   enum cxd56_dmahandle_e  dma_handle;       /* DMA handle */
   struct file             mq;               /* Message queue for receiving messages */
   char                    mqname[16];       /* Our message queue name */
   pthread_t               threadid;         /* ID of our thread */
   sem_t                   pendsem;          /* Protect pendq */

   struct dq_queue_s       up_pendq;         /* Pending buffers from app to process */
   struct dq_queue_s       up_runq;          /* Buffers from app being played */

 #ifdef CONFIG_AUDIO_CXD56_SRC
   struct dq_queue_s       down_pendq;       /* Pending SRC buffers to be DMA'd */
   struct dq_queue_s       down_runq;        /* SRC buffers being processed */
   struct dq_queue_s       down_doneq;       /* Done SRC buffers to be re-used */
 #endif

   uint16_t                samplerate;       /* Sample rate */
 #ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
   int16_t                 volume;           /* Output volume {0..63} */
 #endif  /* CONFIG_AUDIO_EXCLUDE_VOLUME */
   uint8_t                 channels;         /* Number of channels (1..8) */

   uint16_t                mic_gain;         /* Mic gain */
   uint64_t                mic_boot_start;   /* Mic startup wait time */

   uint8_t                 bitwidth;         /* Bits per sample (16 or 24) */
   bool                    muted;            /* True: Output is muted */

   bool                    running;          /* True: Worker thread is running */
   bool                    paused;           /* True: Playing is paused */
 #ifndef CONFIG_AUDIO_EXCLUDE_STOP
   bool                    terminating;      /* True: Stop requested */
 #endif
   bool                    reserved;         /* True: Device is reserved */
   volatile int            result;           /* The result of the last transfer */
   spinlock_t              lock;             /* Spinlock for SMP */
 };

 /****************************************************************************
  * Public Data
  ****************************************************************************/

 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/

 #endif /* CONFIG_AUDIO */

 #endif /* __DRIVERS_AUDIO_CXD56_H */
	/****************************************************************************
	* drivers/audio/cxd56.h
	*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership. The
	* ASF licenses this file to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance with the
	* License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
	* License for the specific language governing permissions and limitations
	* under the License.
	*
	****************************************************************************/

	#ifndef __DRIVERS_AUDIO_CXD56_H
	#define __DRIVERS_AUDIO_CXD56_H

	/****************************************************************************
	* Included Files
	****************************************************************************/

	#include <pthread.h>
	#include <mqueue.h>

	#include <nuttx/audio/audio.h>
	#include <nuttx/config.h>
	#include <nuttx/compiler.h>
	#include <nuttx/fs/ioctl.h>
	#include <nuttx/spinlock.h>

	#ifdef CONFIG_AUDIO

	/****************************************************************************
	* Pre-processor Definitions
	****************************************************************************/

	#ifndef CONFIG_CXD56_AUDIO_WORKER_STACKSIZE
	# define CONFIG_CXD56_AUDIO_WORKER_STACKSIZE 768
	#endif

	#ifndef CONFIG_CXD56_MSG_PRIO
	# define CONFIG_CXD56_MSG_PRIO 1
	#endif

	#ifdef CONFIG_CXD56_AUDIO_I2S_DEVICE_1_MASTER
	# define CXD56_I2S1_MODE 0 /* Master */
	#else
	# define CXD56_I2S1_MODE 1 /* Slave */
	#endif

	#ifdef CONFIG_CXD56_AUDIO_I2S_FORMAT_1_LEFT
	# define CXD56_I2S1_FORMAT 1 /* Left */
	#else
	# define CXD56_I2S1_FORMAT 0 /* Normal */
	#endif

	#ifdef CONFIG_CXD56_AUDIO_I2S_BYPASS_MODE_1_ENABLE
	# define CXD56_I2S1_BYPASS 0 /* Disable */
	#else
	# define CXD56_I2S1_BYPASS 1 /* Enable */
	#endif

	/* I2S data rate of I2S1 */

	#if defined(CONFIG_CXD56_I2S0)
	# define CXD56_I2S1_DATA_RATE CONFIG_CXD56_AUDIO_I2S_RATE_1
	#else
	# define CXD56_I2S1_DATA_RATE 0
	#endif

	#define CXD56_XTAL_24_576MHZ 0
	#define CXD56_XTAL_49_152MHZ 1

	#ifdef CONFIG_CXD56_AUDIO_XTAL_SEL_49_152MHZ
	# define CXD56_AUDIO_MCLK CXD56_XTAL_49_152MHZ
	#else
	# define CXD56_AUDIO_MCLK CXD56_XTAL_24_576MHZ
	#endif

	/* Drive strength levels */
	#define CXD56_DS_WEAKEST 1
	#define CXD56_DS_WEAKER 2
	#define CXD56_DS_STRONGER 3
	#define CXD56_DS_STRONGEST 4

	/* Drive strength of global pin output-A */
	#if defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKEST)
	# define CXD56_GPO_A_DS CXD56_DS_WEAKEST
	#elif defined(CONFIG_CXD56_AUDIO_GPO_A_WEAKER)
	# define CXD56_GPO_A_DS CXD56_DS_WEAKER
	#elif defined(CONFIG_CXD56_AUDIO_GPO_A_STRONGER)
	# define CXD56_GPO_A_DS CXD56_DS_STRONGER
	#else
	# define CXD56_GPO_A_DS CXD56_DS_STRONGEST
	#endif

	/* Drive strength of D/A converted data */
	#if defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKEST)
	# define CXD56_DA_DS CXD56_DS_WEAKEST
	#elif defined(CONFIG_CXD56_AUDIO_DA_DATA_WEAKER)
	# define CXD56_DA_DS CXD56_DS_WEAKER
	#elif defined(CONFIG_CXD56_AUDIO_DA_DATA_STRONGER)
	# define CXD56_DA_DS CXD56_DS_STRONGER
	#else
	# define CXD56_DA_DS CXD56_DS_STRONGEST
	#endif

	/* Drive strength of digital mic clock */
	#if defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKEST)
	# define CXD56_DMIC_CLK_DS CXD56_DS_WEAKEST
	#elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_WEAKER)
	# define CXD56_DMIC_CLK_DS CXD56_DS_WEAKER
	#elif defined(CONFIG_CXD56_AUDIO_CLKOUT_DMIC_STRONGER)
	# define CXD56_DMIC_CLK_DS CXD56_DS_STRONGER
	#else
	# define CXD56_DMIC_CLK_DS CXD56_DS_STRONGEST
	#endif

	/* Drive strength of master clock */
	#if defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKEST)
	# define CXD56_MCLKOUT_DS CXD56_DS_WEAKEST
	#elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_WEAKER)
	# define CXD56_MCLKOUT_DS CXD56_DS_WEAKER
	#elif defined(CONFIG_CXD56_AUDIO_MCLKOUT_STRONGER)
	# define CXD56_MCLKOUT_DS CXD56_DS_STRONGER
	#else
	# define CXD56_MCLKOUT_DS CXD56_DS_STRONGEST
	#endif

	/* Speaker time split on drive */
	#if defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONGEST)
	# define CXD56_SP_SPLIT_ON 4
	#elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_LONG)
	# define CXD56_SP_SPLIT_ON 3
	#elif defined(CONFIG_CXD56_AUDIO_SP_SPLIT_SHORT)
	# define CXD56_SP_SPLIT_ON 2
	#else
	# define CXD56_SP_SPLIT_ON 1
	#endif

	/* Speaker drive mode */

	#if defined(CONFIG_CXD56_AUDIO_SP_DRV_LINEOUT)
	# define CXD56_SP_DRIVER 0
	#elif defined(CONFIG_CXD56_AUDIO_SP_DRV_1DRIVERT)
	# define CXD56_SP_DRIVER 1
	#elif defined(CONFIG_CXD56_AUDIO_SP_DRV_2DRIVERT)
	# define CXD56_SP_DRIVER 2
	#else
	# define CXD56_SP_DRIVER 3
	#endif

	/* Mic bias voltage select */

	#define CXD56_MIC_BIAS_20V 1
	#define CXD56_MIC_BIAS_28V 2

	#if defined(CONFIG_CXD56_AUDIO_MICBIAS_20V)
	# define CXD56_MIC_BIAS CXD56_MIC_BIAS_20V
	#else
	# define CXD56_MIC_BIAS CXD56_MIC_BIAS_28V
	#endif

	/* Mic select */

	#define CXD56_AUDIO_CFG_MIC CONFIG_CXD56_AUDIO_MIC_CHANNEL_SEL

	/* Mic boot wait time */

	#if defined(CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT)
	#define CXD56_MIC_BOOT_WAIT CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT
	#else
	#define CXD56_MIC_BOOT_WAIT 1100
	#endif

	/* CIC filter input path */

	#define CXD56_AUDIO_CFG_CIC_IN_SEL_NONE 0
	#define CXD56_AUDIO_CFG_CIC_IN_SEL_CXD 1
	#define CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF 2

	#if defined(CONFIG_CXD56_AUDIO_CIC_IN_SEL_CXD)
	# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_CXD
	#elif defined (CONFIG_CXD56_AUDIO_CIC_IN_SEL_DMIC)
	# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF
	#else
	# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_NONE
	#endif

	/* DMA format */

	#define CXD56_DMA_FORMAT_LR 0
	#define CXD56_DMA_FORMAT_RL 1

	#if defined(CONFIG_CXD56_AUDIO_DMA_DATA_FORMAT_LR)
	# define CXD56_DMA_FORMAT CXD56_DMA_FORMAT_LR
	#else
	# define CXD56_DMA_FORMAT CXD56_DMA_FORMAT_RL
	#endif

	/* Audio buffer configuration */

	#ifndef CONFIG_CXD56_AUDIO_BUFFER_SIZE
	# define CONFIG_CXD56_AUDIO_BUFFER_SIZE 4096
	#endif

	#ifndef CONFIG_CXD56_AUDIO_NUM_BUFFERS
	# define CONFIG_CXD56_AUDIO_NUM_BUFFERS 4
	#endif

	/* Queue helpers */

	#define dq_get(q) (dq_remfirst(q))
	#define dq_put(q,n) (dq_addlast((dq_entry_t*)n,(q)))
	#define dq_put_back(q,n) (dq_addfirst((dq_entry_t*)n,(q)))
	#define dq_clear(q) \
	do \
	{ \
	dq_remlast(q); \
	} \
	while (!dq_empty(q))

	/****************************************************************************
	* Public Types
	****************************************************************************/

	enum cxd56_dmahandle_e
	{
	CXD56_AUDIO_DMA_MIC,
	CXD56_AUDIO_DMA_I2S0_DOWN,
	CXD56_AUDIO_DMA_COUNT
	};
	typedef enum cxd56_dmahandle_e cxd56_dmahandle_t;

	enum cxd56_devstate_e
	{
	CXD56_DEV_STATE_OFF,
	CXD56_DEV_STATE_PAUSED,
	CXD56_DEV_STATE_BUFFERING,
	CXD56_DEV_STATE_STARTED,
	CXD56_DEV_STATE_STOPPED
	};

	struct cxd56_dev_s
	{
	/* We are an audio lower half driver (We are also the upper "half" of
	* the CS43L22 driver with respect to the board lower half driver).
	*
	* Terminology:
	* Our "lower" half audio instances will be called dev for the publicly
	* visible version and "priv" for the version that only this driver
	* knows. From the point of view of this driver, it is the board lower
	* "half" that is referred to as "lower".
	*/

	struct audio_lowerhalf_s dev; /* CXD56 audio lower half (this device) */

	/* Our specific driver data goes here */

	const FAR struct cxd56_lower_s lower; / Pointer to the board lower functions */
	enum cxd56_devstate_e state; /* Driver state */
	enum cxd56_dmahandle_e dma_handle; /* DMA handle */
	struct file mq; /* Message queue for receiving messages */
	char mqname[16]; /* Our message queue name */
	pthread_t threadid; /* ID of our thread */
	sem_t pendsem; /* Protect pendq */

	struct dq_queue_s up_pendq; /* Pending buffers from app to process */
	struct dq_queue_s up_runq; /* Buffers from app being played */

	#ifdef CONFIG_AUDIO_CXD56_SRC
	struct dq_queue_s down_pendq; /* Pending SRC buffers to be DMA'd */
	struct dq_queue_s down_runq; /* SRC buffers being processed */
	struct dq_queue_s down_doneq; /* Done SRC buffers to be re-used */
	#endif

	uint16_t samplerate; /* Sample rate */
	#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
	int16_t volume; /* Output volume {0..63} */
	#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
	uint8_t channels; /* Number of channels (1..8) */

	uint16_t mic_gain; /* Mic gain */
	uint64_t mic_boot_start; /* Mic startup wait time */

	uint8_t bitwidth; /* Bits per sample (16 or 24) */
	bool muted; /* True: Output is muted */

	bool running; /* True: Worker thread is running */
	bool paused; /* True: Playing is paused */
	#ifndef CONFIG_AUDIO_EXCLUDE_STOP
	bool terminating; /* True: Stop requested */
	#endif
	bool reserved; /* True: Device is reserved */
	volatile int result; /* The result of the last transfer */
	spinlock_t lock; /* Spinlock for SMP */
	};

	/****************************************************************************
	* Public Data
	****************************************************************************/

	/****************************************************************************
	* Public Function Prototypes
	****************************************************************************/

	#endif /* CONFIG_AUDIO */

	#endif /* __DRIVERS_AUDIO_CXD56_H */