boards: xtensa: esp_wrover_kit: initial support

adds initial support to Espressif's ESP-WROVER-KIT
Development board.

Signed-off-by: Glauber Maroto Ferreira <glauber.ferreira@espressif.com>

boards/xtensa/esp_wrover_kit/CMakeLists.txt

@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_BOOTLOADER_ESP_IDF)
+  include(ExternalProject)
+
+  ## we use hello-world project, but I think any can be used.
+  set(espidf_components_dir   ${ESP_IDF_PATH}/components)
+  set(espidf_prefix    ${CMAKE_BINARY_DIR}/esp-idf)
+  set(espidf_build_dir ${espidf_prefix}/build)
+
+  ExternalProject_Add(
+    EspIdfBootloader
+    PREFIX ${espidf_prefix}
+    SOURCE_DIR ${espidf_components_dir}/bootloader/subproject
+    BINARY_DIR ${espidf_build_dir}/bootloader
+    CONFIGURE_COMMAND
+    ${CMAKE_COMMAND} -G${CMAKE_GENERATOR}
+    -S ${espidf_components_dir}/bootloader/subproject
+    -B ${espidf_build_dir}/bootloader -DSDKCONFIG=${espidf_build_dir}/sdkconfig
+    -DIDF_PATH=${ESP_IDF_PATH} -DIDF_TARGET=${CONFIG_BOARD}
+    -DPYTHON_DEPS_CHECKED=1
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_ASM_COMPILER=${CMAKE_ASM_COMPILER}
+    -DCMAKE_SYSTEM_NAME=${CMAKE_SYSTEM_NAME}
+    -DPYTHON=${PYTHON_EXECUTABLE}
+    BUILD_COMMAND
+    ${CMAKE_COMMAND} --build .
+    INSTALL_COMMAND ""      # This particular build system has no install command
+    )
+
+  ExternalProject_Add(
+    EspPartitionTable
+    SOURCE_DIR ${espidf_components_dir}/partition_table
+    BINARY_DIR ${espidf_build_dir}
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND
+    ${PYTHON_EXECUTABLE} ${ESP_IDF_PATH}/components/partition_table/gen_esp32part.py -q
+    --offset 0x8000 --flash-size 4MB ${ESP_IDF_PATH}/components/partition_table/partitions_singleapp.csv ${espidf_build_dir}/partitions_singleapp.bin
+    INSTALL_COMMAND ""
+    )
+
+  if(CONFIG_BUILD_OUTPUT_BIN)
+    set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
+      COMMAND ${PYTHON_EXECUTABLE} ${ESP_IDF_PATH}/components/esptool_py/esptool/esptool.py
+      ARGS --chip esp32 elf2image --flash_mode dio --flash_freq 40m
+      -o ${CMAKE_BINARY_DIR}/zephyr/${CONFIG_KERNEL_BIN_NAME}.bin
+      ${CMAKE_BINARY_DIR}/zephyr/${CONFIG_KERNEL_BIN_NAME}.elf)
+  endif()
+
+  set_property(TARGET bintools PROPERTY disassembly_flag_inline_source)
+
+  add_dependencies(app EspIdfBootloader EspPartitionTable)
+
+  board_finalize_runner_args(esp32 "--esp-flash-bootloader=${espidf_build_dir}/bootloader/bootloader.bin")
+
+  board_finalize_runner_args(esp32 "--esp-flash-partition_table=${espidf_build_dir}/partitions_singleapp.bin")
+
+  board_finalize_runner_args(esp32 "--esp-boot-address=0x1000")
+
+  board_finalize_runner_args(esp32 "--esp-partition-table-address=0x8000")
+
+  board_finalize_runner_args(esp32 "--esp-app-address=0x10000")
+
+endif()

boards/xtensa/esp_wrover_kit/Kconfig.board

@@ -0,0 +1,8 @@
+# ESP-WROVER-KIT board configuration
+
+# Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ESP_WROVER_KIT
+	bool "ESP-WROVER-KIT Development Board"
+	depends on SOC_ESP32

boards/xtensa/esp_wrover_kit/Kconfig.defconfig

@@ -0,0 +1,25 @@
+# ESP-WROVER-KIT board configuration
+
+# Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD
+	default "esp32"
+	depends on BOARD_ESP_WROVER_KIT
+
+config ENTROPY_ESP32_RNG
+	default y if ENTROPY_GENERATOR
+
+if BT
+
+config HEAP_MEM_POOL_SIZE
+	default 16384
+
+config ENTROPY_GENERATOR
+	default y
+
+choice BT_HCI_BUS_TYPE
+	default BT_ESP32
+endchoice
+
+endif # BT

boards/xtensa/esp_wrover_kit/board.cmake

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+if(NOT "${OPENOCD}" MATCHES "^${ESPRESSIF_TOOLCHAIN_PATH}/.*")
+  set(OPENOCD OPENOCD-NOTFOUND)
+endif()
+find_program(OPENOCD openocd PATHS ${ESPRESSIF_TOOLCHAIN_PATH}/openocd-esp32/bin NO_DEFAULT_PATH)
+
+include(${ZEPHYR_BASE}/boards/common/esp32.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/xtensa/esp_wrover_kit/esp_wrover_kit.dts

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+/dts-v1/;
+
+#include <espressif/esp32.dtsi>
+
+/ {
+	model = "esp32";
+	compatible = "espressif,esp32";
+
+	aliases {
+		uart-0 = &uart0;
+		i2c-0 = &i2c0;
+	};
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,flash = &flash0;
+	};
+};
+
+&cpu0 {
+	clock-frequency = <ESP32_CLK_CPU_240M>;
+};
+
+&cpu1 {
+	clock-frequency = <ESP32_CLK_CPU_240M>;
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	tx-pin = <1>;
+	rx-pin = <3>;
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	sda-pin = <21>;
+	scl-pin = <22>;
+};
+
+&spi2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	miso-pin = <12>;
+	mosi-pin = <13>;
+	sclk-pin = <14>;
+	csel-pin = <15>;
+};
+
+&spi3 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	miso-pin = <19>;
+	mosi-pin = <23>;
+	sclk-pin = <18>;
+	csel-pin = <5>;
+};
+
+&timer0 {
+	status = "okay";
+};
+
+&timer1 {
+	status = "okay";
+};
+
+&timer2 {
+	status = "okay";
+};
+
+&timer3 {
+	status = "okay";
+};
+
+&trng0 {
+	status = "okay";
+};
+
+&flash0 {
+	status = "okay";
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@9000 {
+			label = "storage";
+			reg = <0x00009000 0x00006000>;
+		};
+	};
+};

boards/xtensa/esp_wrover_kit/esp_wrover_kit.yaml

@@ -0,0 +1,14 @@
+identifier: esp_wrover_kit
+name: ESP WROVER KIT
+type: mcu
+arch: xtensa
+toolchain:
+  - espressif
+supported:
+  - gpio
+  - i2c
+  - spi
+  - watchdog
+  - uart
+  - pinmux
+  - nvs

boards/xtensa/esp_wrover_kit/esp_wrover_kit_defconfig

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_XTENSA_RESET_VECTOR=n
+
+CONFIG_BOARD_ESP_WROVER_KIT=y
+CONFIG_SOC_ESP32=y
+
+CONFIG_MAIN_STACK_SIZE=2048
+
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=240000000
+
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+
+CONFIG_XTENSA_USE_CORE_CRT1=n
+
+CONFIG_PINMUX=y
+CONFIG_PINMUX_ESP32=y
+
+CONFIG_GPIO=y
+CONFIG_GPIO_ESP32=y
+
+CONFIG_GEN_ISR_TABLES=y
+CONFIG_GEN_IRQ_VECTOR_TABLE=n
+
+CONFIG_I2C=y
+CONFIG_CLOCK_CONTROL=y
+
+CONFIG_BOOTLOADER_ESP_IDF=y

boards/xtensa/esp_wrover_kit/support/openocd.cfg

@@ -0,0 +1,5 @@
+set ESP_RTOS none
+set ESP32_ONLYCPU 1
+
+source [find interface/ftdi/esp32_devkitj_v1.cfg]
+source [find target/esp32.cfg]