drivers: Add Atmel SAM I2S (SSC) driver

Added Inter-IC Sound driver (based on SSC module) for Atmel
SAM MCU family.

Tested on Atmel SMART SAM E70 Xplained board

Origin: Original

Jira: ZEP-2509
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

drivers/i2s/CMakeLists.txt

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+zephyr_sources_ifdef(CONFIG_I2S_SAM_SSC		i2s_sam_ssc.c)

drivers/i2s/Kconfig.sam_ssc

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+# Kconfig - Atmel SAM I2S bus driver configuration options
+#
+# Copyright (c) 2017 Piotr Mienkowski
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+menuconfig I2S_SAM_SSC
+	bool "Atmel SAM MCU family I2S (SSC) Bus Driver"
+	depends on SOC_FAMILY_SAM
+	select DMA
+	default n
+	help
+	Enable Inter Sound (I2S) bus driver for Atmel SAM MCU family based on
+	Synchronous Serial Controller (SSC) module.
+
+if I2S_SAM_SSC
+
+config I2S_SAM_SSC_RX_BLOCK_COUNT
+	int "RX queue length"
+	default 4
+
+config I2S_SAM_SSC_TX_BLOCK_COUNT
+	int "TX queue length"
+	default 4
+
+config I2S_SAM_SSC_0_NAME
+	string "I2S 0 device name"
+	default "I2S_0"
+
+config I2S_SAM_SSC_0_IRQ_PRI
+	int "Interrupt priority"
+	default 0
+
+config I2S_SAM_SSC_DMA_NAME
+	string "DMA device name"
+	default "DMA_0"
+	help
+	  Name of the DMA device this device driver can use.
+
+config I2S_SAM_SSC_0_DMA_RX_CHANNEL
+	int "DMA RX channel"
+	help
+	  DMA channel number to use for RX transfers.
+
+config I2S_SAM_SSC_0_DMA_TX_CHANNEL
+	int "DMA TX channel"
+	help
+	  DMA channel number to use for TX transfers.
+
+choice I2S_SAM_SSC_0_PIN_TD_SELECT
+	prompt "TD pin"
+	depends on SOC_SERIES_SAME70
+
+	config I2S_SAM_SSC_0_PIN_TD_PB5
+		bool "PB5"
+
+	config I2S_SAM_SSC_0_PIN_TD_PD10
+		bool "PD10"
+
+	config I2S_SAM_SSC_0_PIN_TD_PD26
+		bool "PD26"
+
+endchoice # I2S_SAM_SSC_0_PIN_TD_SELECT
+
+config I2S_SAM_SSC_0_PIN_RF_EN
+	bool "RF pin enabled"
+	default y
+	help
+	  If enabled RF signal is connected to RF pin. It will be configured as
+	  an output or an input depending on whether the receiver is working
+	  in master or slave mode.
+
+	  If disabled RF signal is disconnected from RF pin and connected
+	  internally to TF (Transmitter Frame Synchro signal).
+
+config I2S_SAM_SSC_0_PIN_RK_EN
+	bool "RK pin enabled"
+	default y
+	help
+	  If enabled RK signal is connected to RK pin. It will be configured as
+	  an output or an input depending on whether the receiver is working
+	  in master or slave mode.
+
+	  If disabled RK signal is disconnected from RK pin and connected
+	  internally to TK (Transmitter Clock signal).
+
+endif # I2S_SAM_SSC