simmel-bootloader/lib/sdk11/components/libraries/bootloader_dfu/dfu_init.h

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/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
*
* The information contained herein is property of Nordic Semiconductor ASA.
* Terms and conditions of usage are described in detail in NORDIC
* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
*
* Licensees are granted free, non-transferable use of the information. NO
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
*/
/**@file
*
* @defgroup nrf_dfu_init Init packet handling in DFU
* @{
*
* @brief Device Firmware Update module type and function declaration for init packet handling.
*
* @details This header contains basic functionality for performing safety checks on software
* updates for \nRFXX based devices. It provides a skeleton for pre-checking an init packet
* to ensure the following image is compatible with this device. A safety check should
* always be performed to prevent accidental flashing of unsupported applications or a
* wrong combination of application and SoftDevice.
* The device information contains information such as:
* - Device type (2 bytes), for example Heart Rate. The device type is a number defined by
* the customer. It can be located in UICR or FICR.
* - Device revision (2 bytes), for example major revision 1, minor revision 0. The device
* revision is a number defined by the customer. It can be located in UICR or FICR.
* - List of SoftDevices supported by this application, for example
* 0x0049 = S110v6_0_0
* 0xFFFE = S110 development (any SoftDevice accepted),
* - CRC or hash of firmware image
*
* @note This module does not support security features such as image signing, but the corresponding
* implementation allows for such extensions.
* If the init packet is signed by a trusted source, it must be decrypted before it can be
* processed.
*/
#ifndef DFU_INIT_H__
#define DFU_INIT_H__
#include <stdint.h>
#include "nrf.h"
/**@brief Structure contained in an init packet. Contains information on device type, revision, and
* supported SoftDevices.
*/
typedef struct
{
uint16_t device_type; /**< Device type (2 bytes), for example Heart Rate. This number must be defined by the customer before production. It can be located in UICR or FICR. */
uint16_t device_rev; /**< Device revision (2 bytes), for example major revision 1, minor revision 0. This number must be defined by the customer before production. It can be located in UICR or FICR. */
uint32_t app_version; /**< Application version for the image software. This field allows for additional checking, for example ensuring that a downgrade is not allowed. */
uint16_t softdevice_len; /**< Number of different SoftDevice revisions compatible with this application. The list of SoftDevice firmware IDs is defined in @ref softdevice. */
uint16_t softdevice[1]; /**< Variable length array of SoftDevices compatible with this application. The length of the array is specified in the length field. SoftDevice firmware id 0xFFFE indicates any SoftDevice. */
} dfu_init_packet_t;
/**@brief Structure holding basic device information settings.
*/
typedef struct
{
uint16_t device_type; /**< Device type (2 bytes), for example Heart Rate. This number must be defined by the customer before production. It can be located in UICR or FICR. */
uint16_t device_rev; /**< Device revision (2 bytes), for example major revision 1, minor revision 0. This number must be defined by the customer before production. It can be located in UICR or FICR. */
} dfu_device_info_t;
/** The device info offset can be modified to place the device info settings at a different location.
* If the customer reserved UICR location is used for other application specific data, the offset
* must be updated to avoid collision with that data.
*/
/** [DFU UICR DEV offset] */
#define UICR_CUSTOMER_DEVICE_INFO_OFFSET 0x0 /**< Device info offset inside the customer UICR reserved area. Customers may change this value to place the device information in a user-preferred location. */
/** [DFU UICR DEV offset] */
#define UICR_CUSTOMER_RESERVED_OFFSET 0x80 /**< Customer reserved area in the UICR. The area from UICR + 0x80 is reserved for customer usage. */
#define DFU_DEVICE_INFO_BASE (NRF_UICR_BASE + \
UICR_CUSTOMER_RESERVED_OFFSET + \
UICR_CUSTOMER_DEVICE_INFO_OFFSET) /**< The device information base address inside of UICR. */
#define DFU_DEVICE_INFO ((dfu_device_info_t *)DFU_DEVICE_INFO_BASE) /**< The memory mapped structure for device information data. */
#define DFU_DEVICE_TYPE_EMPTY ((uint16_t)0xFFFF) /**< Mask indicating no device type is present in UICR. 0xFFFF is default flash pattern when not written with data. */
#define DFU_DEVICE_REVISION_EMPTY ((uint16_t)0xFFFF) /**< Mask indicating no device revision is present in UICR. 0xFFFF is default flash pattern when not written with data. */
#define DFU_SOFTDEVICE_ANY ((uint16_t)0xFFFE) /**< Mask indicating that any SoftDevice is allowed for updating this application. Allows for easy development. Not to be used in production images. */
/**@brief DFU prevalidate call for pre-checking the received init packet.
*
* @details Pre-validation will safety check the firmware image to be transfered in second stage.
* The function currently checks the device type, device revision, application firmware
* version, and supported SoftDevices. More checks should be added according to
* customer-specific requirements.
*
* @param[in] p_init_data Pointer to the init packet. If the init packet is encrypted or signed,
* it must first be decrypted before being checked.
* @param[in] init_data_len Length of the init data.
*
* @retval NRF_SUCCESS If the pre-validation succeeded, that means the image is
* supported by the device and it is considered to come from a
* trusted source (signing).
* @retval NRF_ERROR_INVALID_DATA If the pre-validation failed, that means the image is not
* supported by the device or comes from an un-trusted source
* (signing).
* @retval NRF_ERROR_INVALID_LENGTH If the size of the init packet is not within the limits of
* the init packet handler.
*/
uint32_t dfu_init_prevalidate(uint8_t * p_init_data, uint32_t init_data_len, uint8_t image_type);
/**@brief DFU postvalidate call for post-checking the received image using the init packet.
*
* @details Post-validation can verify the integrity check the firmware image received before
* activating the image.
* Checks performed can be:
* - A simple CRC as shown in the corresponding implementation of this API in the file
* dfu_init_template.c
* - A hash for better verification of the image.
* - A signature to ensure the image originates from a trusted source.
* Checks are intended to be expanded for customer-specific requirements.
*
* @param[in] p_image Pointer to the received image. The init data provided in the call
* \ref dfu_init_prevalidate will be used for validating the image.
* @param[in] image_len Length of the image data.
*
* @retval NRF_SUCCESS If the post-validation succeeded, that meant the integrity of the
* image has been verified and the image originates from a trusted
* source (signing).
* @retval NRF_ERROR_INVALID_DATA If the post-validation failed, that meant the post check of the
* image failed such as the CRC is not matching the image transfered
* or the verification of the image fails (signing).
*/
uint32_t dfu_init_postvalidate(uint8_t * p_image, uint32_t image_len);
#endif // DFU_INIT_H__
/**@} */