espressif: fix UART init for Serial Recovery and unify adapter code

Fix UART initialization for Espressif chips and unify their serial
adapter code.

Signed-off-by: Almir Okato <[email protected]>

Author: almir-okato

boot/espressif/CMakeLists.txt

@@ -349,7 +349,7 @@ if(CONFIG_ESP_MCUBOOT_SERIAL)
         ${ZCBOR_DIR}/include
         )
     list(APPEND port_srcs
-        ${CMAKE_CURRENT_LIST_DIR}/port/${MCUBOOT_TARGET}/serial_adapter.c
+        ${CMAKE_CURRENT_LIST_DIR}/port/serial_adapter.c
         ${MBEDTLS_DIR}/library/base64.c
         )
     list(APPEND CRYPTO_INC

boot/espressif/port/esp32/bootloader.conf

@@ -42,6 +42,8 @@ CONFIG_ESP_SCRATCH_SIZE=0x40000
 # CONFIG_ESP_SERIAL_BOOT_GPIO_RX=25
 # GPIO for Serial TX signal
 # CONFIG_ESP_SERIAL_BOOT_GPIO_TX=26
+# Baudrate for Serial Recovery communication
+# CONFIG_ESP_SERIAL_BOOT_BAUDRATE=115200
 
 CONFIG_ESP_CONSOLE_UART=y
 CONFIG_ESP_CONSOLE_UART_NUM=0

boot/espressif/port/esp32/serial_adapter.c

@@ -43,6 +43,8 @@ CONFIG_ESP_SCRATCH_SIZE=0x40000
 # CONFIG_ESP_SERIAL_BOOT_GPIO_RX=2
 # GPIO for Serial TX signal
 # CONFIG_ESP_SERIAL_BOOT_GPIO_TX=3
+# Baudrate for Serial Recovery communication
+# CONFIG_ESP_SERIAL_BOOT_BAUDRATE=115200
 
 # Use UART0 for console printing (use either UART or USB alone)
 CONFIG_ESP_CONSOLE_UART=y