espressif: ESP32-C2 initial support

Signed-off-by: Almir Okato <almir.okato@espressif.com>

boot/espressif/CMakeLists.txt

@@ -22,6 +22,7 @@ if ("${MCUBOOT_TARGET}" STREQUAL "esp32" OR
  set(MCUBOOT_ARCH "xtensa")
 elseif("${MCUBOOT_TARGET}" STREQUAL "esp32c3" OR
  "${MCUBOOT_TARGET}" STREQUAL "esp32c6" OR
+ "${MCUBOOT_TARGET}" STREQUAL "esp32c2" OR
  "${MCUBOOT_TARGET}" STREQUAL "esp32h2")
  set(MCUBOOT_ARCH "riscv")
 endif()
@@ -37,6 +38,8 @@ elseif("${MCUBOOT_TARGET}" STREQUAL "esp32c3")
  set(ESP_MIN_REVISION 3)
 elseif("${MCUBOOT_TARGET}" STREQUAL "esp32c6")
  set(ESP_MIN_REVISION 0)
+elseif("${MCUBOOT_TARGET}" STREQUAL "esp32c2")
+ set(ESP_MIN_REVISION 0)
 elseif("${MCUBOOT_TARGET}" STREQUAL "esp32h2")
  set(ESP_MIN_REVISION 0)
 else()
@@ -118,6 +121,8 @@ if (NOT DEFINED ESP_FLASH_FREQ)
  "${MCUBOOT_TARGET}" STREQUAL "esp32c3" OR
  "${MCUBOOT_TARGET}" STREQUAL "esp32c6")
  set(ESP_FLASH_FREQ "40m")
+ elseif("${MCUBOOT_TARGET}" STREQUAL "esp32c2")
+ set(ESP_FLASH_FREQ "60m")
  elseif("${MCUBOOT_TARGET}" STREQUAL "esp32h2")
  set(ESP_FLASH_FREQ "24m")
  endif()

boot/espressif/hal/include/esp32c2/esp32c2.cmake

@@ -0,0 +1,29 @@
+# SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+#
+# SPDX-License-Identifier: Apache-2.0
+
+list(APPEND hal_srcs
+ ${esp_hal_dir}/components/esp_hw_support/port/${MCUBOOT_TARGET}/rtc_init.c
+ ${esp_hal_dir}/components/hal/cache_hal.c
+ ${esp_hal_dir}/components/efuse/${MCUBOOT_TARGET}/esp_efuse_table.c
+ ${esp_hal_dir}/components/efuse/src/efuse_controller/keys/without_key_purposes/one_key_block/esp_efuse_api_key.c
+)
+
+if (DEFINED CONFIG_ESP_CONSOLE_UART_CUSTOM)
+ list(APPEND hal_srcs
+ ${src_dir}/${MCUBOOT_TARGET}/console_uart_custom.c
+ )
+endif()
+
+list(APPEND LINKER_SCRIPTS
+ -T${esp_hal_dir}/components/esp_rom/${MCUBOOT_TARGET}/ld/${MCUBOOT_TARGET}.rom.newlib.ld
+)
+
+set_source_files_properties(
+ ${esp_hal_dir}/components/bootloader_support/src/esp_image_format.c
+ ${esp_hal_dir}/components/bootloader_support/bootloader_flash/src/bootloader_flash.c
+ ${esp_hal_dir}/components/bootloader_support/bootloader_flash/src/bootloader_flash_config_${MCUBOOT_TARGET}.c
+ ${esp_hal_dir}/components/hal/mmu_hal.c
+ ${esp_hal_dir}/components/hal/cache_hal.c
+ PROPERTIES COMPILE_FLAGS
+ "-Wno-logical-op")

boot/espressif/hal/include/esp32c2/sdkconfig.h

@@ -0,0 +1,30 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define BOOTLOADER_BUILD 1
+#define CONFIG_IDF_FIRMWARE_CHIP_ID 0x000C
+#define CONFIG_IDF_TARGET_ESP32C2 1
+#define CONFIG_ESP32C2_REV_MIN_0 1
+#define CONFIG_ESP32C2_REV_MIN_FULL 3
+#define CONFIG_ESP_REV_MIN_FULL CONFIG_ESP32C2_REV_MIN_FULL
+#define CONFIG_ESP32C2_REV_MIN 3
+#define CONFIG_ESP32C2_REV_MAX_FULL 99
+#define CONFIG_ESP_REV_MAX_FULL CONFIG_ESP32C2_REV_MAX_FULL
+#define CONFIG_IDF_TARGET_ARCH_RISCV 1
+#define CONFIG_MMU_PAGE_SIZE 0x10000
+#define CONFIG_XTAL_FREQ_26 1
+#define CONFIG_XTAL_FREQ 26
+#define CONFIG_SPI_FLASH_ROM_DRIVER_PATCH 1
+#define CONFIG_MCUBOOT 1
+#define NDEBUG 1
+#define CONFIG_BOOTLOADER_WDT_TIME_MS 9000
+#define CONFIG_ESP_CONSOLE_UART_BAUDRATE 115200
+#define CONFIG_BOOTLOADER_OFFSET_IN_FLASH 0x0000
+#define CONFIG_PARTITION_TABLE_OFFSET 0x10000
+#define CONFIG_EFUSE_VIRTUAL_OFFSET 0x250000
+#define CONFIG_EFUSE_VIRTUAL_SIZE 0x2000
+#define CONFIG_EFUSE_MAX_BLK_LEN 256
+#define CONFIG_BOOTLOADER_FLASH_XMC_SUPPORT 1

boot/espressif/hal/include/mcuboot_config/mcuboot_logging.h

@@ -27,6 +27,8 @@ extern int ets_printf(const char *fmt, ...);
 #define TARGET "[esp32c3]"
 #elif CONFIG_IDF_TARGET_ESP32C6
 #define TARGET "[esp32c6]"
+#elif CONFIG_IDF_TARGET_ESP32C2
+#define TARGET "[esp32c2]"
 #elif CONFIG_IDF_TARGET_ESP32H2
 #define TARGET "[esp32h2]"
 #else

boot/espressif/hal/src/esp32c2/console_uart_custom.c

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <esp_rom_uart.h>
+#include <hal/uart_ll.h>
+#include <soc/uart_periph.h>
+
+#if CONFIG_ESP_CONSOLE_UART_CUSTOM
+static uart_dev_t *alt_console_uart_dev = (CONFIG_ESP_CONSOLE_UART_NUM == 0) ?
+ &UART0 :
+ &UART1;
+
+void IRAM_ATTR esp_rom_uart_putc(char c)
+{
+ while (uart_ll_get_txfifo_len(alt_console_uart_dev) == 0);
+ uart_ll_write_txfifo(alt_console_uart_dev, (const uint8_t *) &c, 1);
+}
+#endif

boot/espressif/port/esp32c2/bootloader.conf

@@ -0,0 +1,88 @@
+# SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+#
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ESP_FLASH_SIZE=4MB
+CONFIG_ESP_BOOTLOADER_SIZE=0xF000
+CONFIG_ESP_BOOTLOADER_OFFSET=0x0000
+CONFIG_ESP_IMAGE0_PRIMARY_START_ADDRESS=0x10000
+CONFIG_ESP_APPLICATION_SIZE=0x100000
+CONFIG_ESP_IMAGE0_SECONDARY_START_ADDRESS=0x110000
+CONFIG_ESP_MCUBOOT_WDT_ENABLE=y
+CONFIG_ESP_SCRATCH_OFFSET=0x210000
+CONFIG_ESP_SCRATCH_SIZE=0x40000
+
+# When enabled, prevents updating image to an older version
+# CONFIG_ESP_DOWNGRADE_PREVENTION=y
+# This option makes downgrade prevention rely also on security
+# counter (defined using imgtool) instead of only image version
+# CONFIG_ESP_DOWNGRADE_PREVENTION_SECURITY_COUNTER=y
+
+# Enables the MCUboot Serial Recovery, that allows the use of
+# MCUMGR to upload a firmware through the serial port
+# CONFIG_ESP_MCUBOOT_SERIAL=y
+# Use Serial through USB JTAG Serial port for Serial Recovery
+# CONFIG_ESP_MCUBOOT_SERIAL_USB_SERIAL_JTAG=y
+# Use sector erasing (recommended) instead of entire image size
+# erasing when uploading through Serial Recovery
+# CONFIG_ESP_MCUBOOT_ERASE_PROGRESSIVELY=y
+
+# GPIO used to boot on Serial Recovery
+# CONFIG_ESP_SERIAL_BOOT_GPIO_DETECT=5
+# GPIO input type (0 for Pull-down, 1 for Pull-up)
+# CONFIG_ESP_SERIAL_BOOT_GPIO_INPUT_TYPE=0
+# GPIO signal value
+# CONFIG_ESP_SERIAL_BOOT_GPIO_DETECT_VAL=1
+# Delay time for identify the GPIO signal
+# CONFIG_ESP_SERIAL_BOOT_DETECT_DELAY_S=5
+# UART port used for serial communication (not needed when using USB)
+# CONFIG_ESP_SERIAL_BOOT_UART_NUM=1
+# GPIO for Serial RX signal
+# CONFIG_ESP_SERIAL_BOOT_GPIO_RX=8
+# GPIO for Serial TX signal
+# CONFIG_ESP_SERIAL_BOOT_GPIO_TX=9
+
+# Use UART0 for console printing (use either UART or USB alone)
+CONFIG_ESP_CONSOLE_UART=y
+CONFIG_ESP_CONSOLE_UART_NUM=0
+# Configures alternative UART port for console printing
+# (UART_NUM=0 must not be changed)
+# CONFIG_ESP_CONSOLE_UART_CUSTOM=y
+# CONFIG_ESP_CONSOLE_UART_TX_GPIO=9
+# CONFIG_ESP_CONSOLE_UART_RX_GPIO=8
+# Use USB JTAG Serial for console printing
+# CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y
+
+# CONFIG_ESP_SIGN_EC256=y
+# CONFIG_ESP_SIGN_ED25519=n
+# CONFIG_ESP_SIGN_RSA=n
+# CONFIG_ESP_SIGN_RSA_LEN=2048
+
+# Use Tinycrypt lib for EC256 or ED25519 signing
+# CONFIG_ESP_USE_TINYCRYPT=y
+# Use Mbed TLS lib for RSA image signing
+# CONFIG_ESP_USE_MBEDTLS=n
+
+# It is strongly recommended to generate a new signing key
+# using imgtool instead of use the existent sample
+# CONFIG_ESP_SIGN_KEY_FILE=root-ec-p256.pem
+
+# Hardware Secure Boot related options
+# CONFIG_SECURE_SIGNED_ON_BOOT=1
+# CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME=1
+# CONFIG_SECURE_BOOT=1
+# CONFIG_SECURE_BOOT_V2_ENABLED=1
+# CONFIG_SECURE_BOOT_SUPPORTS_RSA=1
+
+# Hardware Flash Encryption related options
+# CONFIG_SECURE_FLASH_ENC_ENABLED=1
+# CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_ENC=1
+# CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_DEC=1
+# CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_CACHE=1
+# CONFIG_SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT=1
+# CONFIG_SECURE_BOOT_ALLOW_JTAG=1
+# CONFIG_SECURE_BOOT_ALLOW_ROM_BASIC=1
+
+# Options for enabling eFuse emulation in Flash
+# CONFIG_EFUSE_VIRTUAL=1
+# CONFIG_EFUSE_VIRTUAL_KEEP_IN_FLASH=1