drivers: i2s_cavs: Add bidirectional I2S support

Added bidirectional I2S support for Intel S1000

- Added implementation for I2S receive mode
- Extended driver instances to support 3 I2S ports
- Added DMA channel mappings for upto 4 I2S ports
- Utilized k_msgq to track buffers through the driver
    - Allocate buffers for audio reception in the driver
    - Free buffers after audio transmission in the driver
- Perform buffer reload for DMA after every reception/transmission
- Removed unused Kconfig variables
    - I2S_CAVS_TX_BLOCK_COUNT
    - I2S_CAVS_RX_BLOCK_COUNT

Signed-off-by: Sathish Kuttan <sathish.k.kuttan@intel.com>

drivers/i2s/Kconfig.cavs

@@ -15,44 +15,62 @@ menuconfig I2S_CAVS
 
 if I2S_CAVS
 
-config I2S_CAVS_TX_BLOCK_COUNT
-	int "TX queue length"
-	default 4
-	help
-	  The maximum number of blocks that can be accommodated in the Tx queue.
-
-config I2S_CAVS_0_NAME
-	string "I2S 0 device name"
-	default "I2S_0"
-
-config I2S_CAVS_0_IRQ_PRI
-	int "Interrupt priority"
-	default 0
-
 config I2S_CAVS_DMA_NAME
 	string "DMA device name"
 	default "DMA_0"
 	help
 	  Name of the DMA device this device driver can use.
 
-config I2S_CAVS_0_DMA_TX_CHANNEL
-	int "DMA TX channel"
-	default 2
-	help
-	  DMA channel number to use for TX transfers.
+config I2S_CAVS_IRQ_PRI
+	int "Interrupt priority"
+	default 0
 
 config I2S_CAVS_1_NAME
 	string "I2S 1 device name"
 	default "I2S_1"
 
-config I2S_CAVS_1_IRQ_PRI
-	int "Interrupt priority"
-	default 0
-
 config I2S_CAVS_1_DMA_TX_CHANNEL
+	int "DMA TX channel"
+	default 2
+	help
+	  DMA channel number to use for I2S1 TX transfer.
+
+config I2S_CAVS_1_DMA_RX_CHANNEL
+	int "DMA RX channel"
+	default 3
+	help
+	  DMA channel number to use for I2S1 RX transfer.
+
+config I2S_CAVS_2_NAME
+	string "I2S 2 device name"
+	default "I2S_2"
+
+config I2S_CAVS_2_DMA_TX_CHANNEL
 	int "DMA TX channel"
 	default 4
 	help
-	  DMA channel number to use for TX transfers.
+	  DMA channel number to use for I2S2 TX transfer.
+
+config I2S_CAVS_2_DMA_RX_CHANNEL
+	int "DMA RX channel"
+	default 5
+	help
+	  DMA channel number to use for I2S2 RX transfer.
+
+config I2S_CAVS_3_NAME
+	string "I2S 3 device name"
+	default "I2S_3"
+
+config I2S_CAVS_3_DMA_TX_CHANNEL
+	int "DMA TX channel"
+	default 6
+	help
+	  DMA channel number to use for I2S3 TX transfer.
+
+config I2S_CAVS_3_DMA_RX_CHANNEL
+	int "DMA RX channel"
+	default 7
+	help
+	  DMA channel number to use for I2S3 RX transfer.
 
 endif # I2S_CAVS