samples: cellular: nrf_cloud_rest_fota: add smp fota for nrf9160dk

Add the option to enable SMP FOTA on the nRF9160DK.
IRIS-9481

Signed-off-by: Justin Morton <[email protected]>

samples/cellular/nrf_cloud_rest_fota/CMakeLists.txt

@@ -12,4 +12,8 @@ zephyr_compile_definitions(PROJECT_NAME=${PROJECT_NAME})
 
 # NORDIC SDK APP START
 target_sources(app PRIVATE src/main.c)
+
+if(CONFIG_NRF_CLOUD_FOTA_SMP AND CONFIG_BOARD_NRF9160DK_NRF9160_NS)
+  target_sources(app PRIVATE src/smp_reset.c)
+endif()
 # NORDIC SDK APP END

samples/cellular/nrf_cloud_rest_fota/README.rst

@@ -115,6 +115,19 @@ To enable full modem FOTA, add the following parameter to your build command:
 Also, if you are using an nRF9160 DK, specify your development kit version by appending it to the board name.
 For example, if you are using version 1.0.1, use the board name ``[email protected]/nrf9160/ns`` in your build command.
 
+To enable SMP FOTA (nRF9160 DK only), add the following parameters to your build command:
+
+* ``-DEXTRA_CONF_FILE=overlay_smp_fota.conf``
+* ``-DEXTRA_DTC_OVERLAY_FILE=nrf9160dk_mcumgr_client_uart2.overlay``
+
+The nRF52840 device on your DK must be running an SMP compatible firmware, such as the :ref:`smp_svr` sample.
+Build the :ref:`smp_svr` sample for the ``nrf9160dk/nrf52840`` board with the following parameters:
+
+* ``-DEXTRA_CONF_FILE=overlay_smp_fota.conf``
+* ``-DEXTRA_DTC_OVERLAY_FILE=nrf9160dk_mcumgr_client_uart2.overlay``
+
+To change :ref:`smp_svr` sample's application version, set the :kconfig:option:`CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION` Kconfig option.
+
 Dependencies
 ************
 

samples/cellular/nrf_cloud_rest_fota/nrf9160dk_mcumgr_client_uart2.overlay

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/* Generic PIN definition for UART2 or UART1 to nRF52840  */
+&pinctrl {
+	mcumgr_uart_default: mcumgr_uart_default {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 23)>,
+				<NRF_PSEL(UART_RTS, 0, 17)>;
+			};
+		group2 {
+			psels = <NRF_PSEL(UART_RX, 0, 21)>,
+				<NRF_PSEL(UART_CTS, 0, 22)>;
+				bias-pull-up;
+		};
+	};
+
+	mcumgr_uart_sleep: mcumgr_uart_sleep {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 23)>,
+				<NRF_PSEL(UART_RX, 0, 21)>,
+				<NRF_PSEL(UART_RTS, 0, 17)>,
+				<NRF_PSEL(UART_CTS, 0, 22)>;
+				low-power-enable;
+		};
+	};
+};
+
+&uart2 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <1000000>;
+	status = "okay";
+	pinctrl-0 = <&mcumgr_uart_default>;
+	pinctrl-1 = <&mcumgr_uart_sleep>;
+	pinctrl-names = "default", "sleep";
+	hw-flow-control;
+};
+
+/ {
+	chosen {
+		zephyr,uart-mcumgr = &uart2;
+	};
+};

samples/cellular/nrf_cloud_rest_fota/overlay_smp_fota.conf

@@ -0,0 +1,12 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+CONFIG_NRF_CLOUD_FOTA_SMP=y
+CONFIG_NRF_MCUMGR_SMP_CLIENT=y
+CONFIG_MCUMGR_GRP_IMG=y
+CONFIG_MCUMGR_GRP_OS=y
+CONFIG_MCUMGR_TRANSPORT_UART=y
+CONFIG_UART_MCUMGR_RX_BUF_COUNT=4
+CONFIG_BOOT_IMAGE_ACCESS_HOOKS=y

samples/cellular/nrf_cloud_rest_fota/src/main.c

@@ -18,6 +18,7 @@
 #include <net/nrf_cloud_defs.h>
 #include <net/fota_download.h>
 #include <dk_buttons_and_leds.h>
+#include "smp_reset.h"
 
 LOG_MODULE_REGISTER(nrf_cloud_rest_fota, CONFIG_NRF_CLOUD_REST_FOTA_SAMPLE_LOG_LEVEL);
 
@@ -81,7 +82,10 @@ static void sample_reboot(enum nrf_cloud_fota_reboot_status status);
 static struct nrf_cloud_fota_poll_ctx fota_ctx = {
 	.rest_ctx = &rest_ctx,
 	.device_id = device_id,
-	.reboot_fn = sample_reboot
+	.reboot_fn = sample_reboot,
+#if SMP_FOTA_ENABLED
+	.smp_reset_cb = nrf52840_reset_api
+#endif
 };
 
 #if defined(CONFIG_REST_FOTA_DO_JITP)
@@ -219,7 +223,8 @@ static void send_device_status(void)
 		.bootloader = 1,
 		.modem = 1,
 		.application = 1,
-		.modem_full = fota_ctx.full_modem_fota_supported
+		.modem_full = fota_ctx.full_modem_fota_supported,
+		.smp = SMP_FOTA_ENABLED
 	};
 
 	struct nrf_cloud_svc_info svc_inf = {

samples/cellular/nrf_cloud_rest_fota/src/smp_reset.c

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+#include <zephyr/kernel.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/device.h>
+#include <zephyr/devicetree.h>
+
+LOG_MODULE_REGISTER(nrf_cloud_rest_fota_smp, CONFIG_NRF_CLOUD_REST_FOTA_SAMPLE_LOG_LEVEL);
+
+#define RESET_NODE DT_NODELABEL(nrf52840_reset)
+#define HAS_RECOVERY_MODE (DT_NODE_HAS_STATUS(RESET_NODE, okay))
+
+int nrf52840_reset_api(void)
+{
+	int err;
+	const struct gpio_dt_spec reset_pin_spec = GPIO_DT_SPEC_GET(RESET_NODE, gpios);
+
+	if (!device_is_ready(reset_pin_spec.port)) {
+		LOG_ERR("Reset device not ready");
+		return -EIO;
+	}
+
+	/* Configure pin as output and initialize it to inactive state. */
+	err = gpio_pin_configure_dt(&reset_pin_spec, GPIO_OUTPUT_INACTIVE);
+	if (err) {
+		LOG_ERR("Pin configure err: %d", err);
+		return err;
+	}
+
+	/* Reset the nRF52840 and let it wait until the pin is inactive again
+	 * before running to main to ensure that it won't send any data until
+	 * the H4 device is setup and ready to receive.
+	 */
+	err = gpio_pin_set_dt(&reset_pin_spec, 1);
+	if (err) {
+		LOG_ERR("GPIO Pin set to 1 err: %d", err);
+		return err;
+	}
+
+	/* Wait for the nRF52840 peripheral to stop sending data.
+	 *
+	 * It is critical (!) to wait here, so that all bytes
+	 * on the lines are received and drained correctly.
+	 */
+	k_sleep(K_MSEC(10));
+
+	/* We are ready, let the nRF52840 run to main */
+	err = gpio_pin_set_dt(&reset_pin_spec, 0);
+	if (err) {
+		LOG_ERR("GPIO Pin set to 0 err: %d", err);
+		return err;
+	}
+
+	LOG_DBG("Reset Pin %d", reset_pin_spec.pin);
+
+	return 0;
+}

samples/cellular/nrf_cloud_rest_fota/src/smp_reset.h

@@ -0,0 +1,20 @@
+/* Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef _SMP_RESET_H_
+#define _SMP_RESET_H_
+
+#if defined(CONFIG_NRF_CLOUD_FOTA_SMP) && defined(CONFIG_BOARD_NRF9160DK_NRF9160_NS)
+#define SMP_FOTA_ENABLED 1
+#else
+#define SMP_FOTA_ENABLED 0
+#endif
+
+/**
+ * @brief Reset the nRF52840 for SMP FOTA.
+ */
+int nrf52840_reset_api(void);
+
+#endif /* _SMP_RESET_H_ */