intel_adsp: soc: ace: Add communication widget driver

Intel DSP Communication Widget is a device for generic sideband
message transmit/receive between IPs in a SOC.

Signed-off-by: Adrian Warecki <[email protected]>

Author: softwarecki

dts/bindings/misc/intel,adsp-communication-widget.yaml

@@ -0,0 +1,12 @@
+# Copyright (c) 2022 Intel Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+description: Intel ADSP Communication Widget
+
+compatible: "intel,adsp-communication-widget"
+
+include: base.yaml
+
+properties:
+  reg:
+    required: true

dts/xtensa/intel/intel_adsp_ace15_mtpm.dtsi

@@ -420,6 +420,14 @@
 			};
 		};
 
+		ace_comm_widget: ace_comm_widget@71C00 {
+			compatible = "intel,adsp-communication-widget";
+			reg = <0x00071C00 0x100>;
+			interrupts = <0x19 0 0>;
+			interrupt-parent = <&ace_intc>;
+			status = "okay";
+		};
+
 		shim: shim@71f00 {
 			compatible = "intel,adsp-shim";
 			reg = <0x71f00 0x100>;

soc/xtensa/intel_adsp/ace/CMakeLists.txt

@@ -12,3 +12,6 @@ zephyr_library_sources(
   power.c
   boot.c
   )
+
+zephyr_library_sources_ifdef(CONFIG_SOC_INTEL_COMM_WIDGET comm_widget.c)
+zephyr_library_sources_ifdef(CONFIG_SOC_INTEL_COMM_WIDGET comm_widget_messages.c)

soc/xtensa/intel_adsp/ace/Kconfig.soc

@@ -9,3 +9,11 @@ choice
 		depends on SOC_SERIES_INTEL_ACE
 
 endchoice
+
+config SOC_INTEL_COMM_WIDGET
+	bool "Intel Communication Widget driver"
+	default y
+	depends on DT_HAS_INTEL_ADSP_COMMUNICATION_WIDGET_ENABLED
+	help
+	  Select this to enable Intel Communication Widget driver.
+	  DSP Communication Widget is a device for generic sideband message transmit/receive.

soc/xtensa/intel_adsp/ace/comm_widget.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2022 Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "comm_widget.h"
+
+/*
+ * Operation codes
+ */
+#define CW_OPCODE_CRRD 0x06
+#define CW_OPCODE_CRWR 0x07
+
+void cw_sb_write(uint32_t dest, uint32_t func, uint16_t address, uint32_t data)
+{
+	cw_upstream_set_attr(dest, func, CW_OPCODE_CRWR, 0, 0);
+	cw_upstream_set_address16(address);
+	cw_upstream_set_data(data);
+	cw_upstream_do_pw();
+}