drivers/audio/es8388: Add input support

drivers/audio/Kconfig

@@ -210,6 +210,7 @@ config AUDIO_ES8388
 	bool "ES8388 codec chip"
 	default n
 	depends on AUDIO
+	select AUDIO_DRIVER_SPECIFIC_BUFFERS
 	---help---
 		Select to enable support for the ES8388 Audio codec by Everest
 		Semiconductor.
@@ -223,10 +224,62 @@ config ES8388_INPUT_INITVOLUME
 	int "ES8388 initial input volume setting"
 	default 1000
 
+config ES8388_OUTPUT_CHANNEL
+	int
+	default 0 if ES8388_OUTPUT_CHANNEL_LINE1
+	default 1 if ES8388_OUTPUT_CHANNEL_LINE2
+	default 2 if ES8388_OUTPUT_CHANNEL_ALL
+
+choice
+	prompt "ES8388 output channel"
+	default ES8388_OUTPUT_CHANNEL_ALL
+	---help---
+		Select the codec channel that will output audio.
+		The actual device that will reproduce the audio signal depends
+		on the board implementation.
+
+config ES8388_OUTPUT_CHANNEL_LINE1
+	bool "Line 1"
+
+config ES8388_OUTPUT_CHANNEL_LINE2
+	bool "Line 2"
+
+config ES8388_OUTPUT_CHANNEL_ALL
+	bool "Both"
+
+endchoice
+
 config ES8388_OUTPUT_INITVOLUME
 	int "ES8388 initial output volume setting"
 	default 400
 
+config ES8388_INPUT_CHANNEL
+	int
+	default 0 if ES8388_INPUT_CHANNEL_LINE1
+	default 1 if ES8388_INPUT_CHANNEL_LINE2
+	default 3 if ES8388_INPUT_CHANNEL_DIFFERENTIAL
+
+choice
+	prompt "ES8388 input channel"
+	default ES8388_INPUT_CHANNEL_LINE1
+	---help---
+		Select the codec channel that will input audio.
+		The actual device that will reproduce the audio signal depends
+		on the board implementation.
+		The "Differential" option will take the difference between the Line 1
+		left and right channels.
+
+config ES8388_INPUT_CHANNEL_LINE1
+	bool "Line 1"
+
+config ES8388_INPUT_CHANNEL_LINE2
+	bool "Line 2"
+
+config ES8388_INPUT_CHANNEL_DIFFERENTIAL
+	bool "Differential"
+
+endchoice
+
 config ES8388_INFLIGHT
 	int "ES8388 maximum in-flight audio buffers"
 	default 2

drivers/audio/es8388.h

@@ -1072,10 +1072,10 @@ struct es8388_dev_s
   FAR const struct es8388_lower_s    *lower;            /* Pointer to the board lower functions */
   FAR struct i2c_master_s            *i2c;              /* I2C driver to use */
   FAR struct i2s_dev_s               *i2s;              /* I2S driver to use */
-  struct dq_queue_s                   pendq;            /* Queue of pending buffers to be sent */
+  struct dq_queue_s                   pendq;            /* Queue of pending buffers to be processed */
   struct dq_queue_s                   doneq;            /* Queue of sent buffers to be returned */
   struct file                         mq;               /* Message queue for receiving messages */
-  char                                mqname[16];       /* Our message queue name */
+  char                                mqname[NAME_MAX]; /* Our message queue name */
   pthread_t                           threadid;         /* ID of our thread */
   uint32_t                            bitrate;          /* Actual programmed bit rate */
   mutex_t                             pendlock;         /* Protect pendq */
@@ -1084,7 +1084,8 @@ struct es8388_dev_s
 #ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
   uint16_t                            balance;          /* Current balance level {0..1000} */
 #endif /* CONFIG_AUDIO_EXCLUDE_BALANCE */
-  uint16_t                            volume;           /* Current volume level {0..1000} */
+  uint16_t                            volume_out;       /* Current output volume level {0..1000} */
+  uint16_t                            volume_in;        /* Current input volume level {0..1000} */
 #endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
   uint8_t                             nchannels;        /* Number of channels (1 or 2) */
   uint8_t                             bpsamp;           /* Bits per sample */
@@ -1100,6 +1101,7 @@ struct es8388_dev_s
   es8388_module_t                     audio_mode;       /* The current audio mode of the ES8388 chip */
   es8388_dac_output_t                 dac_output;       /* The current output of the ES8388 DAC */
   es8388_adc_input_t                  adc_input;        /* The current input of the ES8388 ADC */
+  es8388_mic_gain_t                   mic_gain;         /* The current microphone gain */
   uint32_t                            mclk;             /* The current MCLK frequency */
 };
 

include/nuttx/audio/audio.h

@@ -240,9 +240,7 @@
  */
 
 #define AUDIO_VOLUME_MAX            1000
-#define AUDIO_VOLUME_MAX_FLOAT      1000.0f
 #define AUDIO_VOLUME_MIN            0
-#define AUDIO_VOLUME_MIN_FLOAT      0.0f
 
 /* Audio Balance Limits *****************************************************/
 
@@ -252,11 +250,8 @@
  */
 
 #define AUDIO_BALANCE_RIGHT          1000
-#define AUDIO_BALANCE_RIGHT_FLOAT    1000.0f
 #define AUDIO_BALANCE_CENTER         500
-#define AUDIO_BALANCE_CENTER_FLOAT   500.0f
 #define AUDIO_BALANCE_LEFT           0
-#define AUDIO_BALANCE_LEFT_FLOAT     0.0f
 
 /* Supported Feature Units controls *****************************************/