136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/**
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* @file
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*
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* @brief Public APIs to get device Information.
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*/
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/*
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* Copyright (c) 2018 Alexander Wachter
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_DRIVERS_HWINFO_H_
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#define ZEPHYR_INCLUDE_DRIVERS_HWINFO_H_
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/**
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* @brief Hardware Information Interface
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* @defgroup hwinfo_interface Hardware Info Interface
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* @ingroup io_interfaces
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* @{
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*/
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#include <zephyr/types.h>
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#include <sys/types.h>
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#include <stddef.h>
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#include <errno.h>
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#include <kernel.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define RESET_PIN BIT(0)
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#define RESET_SOFTWARE BIT(1)
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#define RESET_BROWNOUT BIT(2)
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#define RESET_POR BIT(3)
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#define RESET_WATCHDOG BIT(4)
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#define RESET_DEBUG BIT(5)
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#define RESET_SECURITY BIT(6)
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#define RESET_LOW_POWER_WAKE BIT(7)
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#define RESET_CPU_LOCKUP BIT(8)
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#define RESET_PARITY BIT(9)
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#define RESET_PLL BIT(10)
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#define RESET_CLOCK BIT(11)
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#define RESET_HARDWARE BIT(12)
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#define RESET_USER BIT(13)
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#define RESET_TEMPERATURE BIT(14)
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/**
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* @brief Copy the device id to a buffer
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*
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* This routine copies "length" number of bytes of the device ID to the buffer.
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* If the device ID is smaller then length, the rest of the buffer is left unchanged.
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* The ID depends on the hardware and is not guaranteed unique.
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*
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* Drivers are responsible for ensuring that the ID data structure is a
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* sequence of bytes. The returned ID value is not supposed to be interpreted
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* based on vendor-specific assumptions of byte order. It should express the
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* identifier as a raw byte sequence, doing any endian conversion necessary so
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* that a hex representation of the bytes produces the intended serial number.
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*
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* @param buffer Buffer to write the ID to.
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* @param length Max length of the buffer.
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*
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* @retval size of the device ID copied.
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* @retval -ENOTSUP if there is no implementation for the particular device.
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* @retval any negative value on driver specific errors.
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*/
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__syscall ssize_t hwinfo_get_device_id(uint8_t *buffer, size_t length);
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ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length);
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/**
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* @brief Retrieve cause of device reset.
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*
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* @param cause OR'd `reset_cause` flags
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*
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* This routine retrieves the flags that indicate why the device was reset.
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*
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* On some platforms the reset cause flags accumulate between successive resets
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* and this routine may return multiple flags indicating all reset causes
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* since the device was powered on. If you need to retrieve the cause only for
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* the most recent reset call `hwinfo_clear_reset_cause` after calling this
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* routine to clear the hardware flags before the next reset event.
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*
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* Successive calls to this routine will return the same value, unless
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* `hwinfo_clear_reset_cause` has been called.
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*
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* @retval zero if successful.
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* @retval -ENOTSUP if there is no implementation for the particular device.
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* @retval any negative value on driver specific errors.
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*/
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__syscall int hwinfo_get_reset_cause(uint32_t *cause);
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int z_impl_hwinfo_get_reset_cause(uint32_t *cause);
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/**
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* @brief Clear cause of device reset.
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*
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* Clears reset cause flags.
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*
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* @retval zero if successful.
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* @retval -ENOTSUP if there is no implementation for the particular device.
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* @retval any negative value on driver specific errors.
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*/
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__syscall int hwinfo_clear_reset_cause(void);
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int z_impl_hwinfo_clear_reset_cause(void);
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/**
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* @brief Get supported reset cause flags
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*
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* @param supported OR'd `reset_cause` flags that are supported
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*
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* Retrieves all `reset_cause` flags that are supported by this device.
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*
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* @retval zero if successful.
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* @retval -ENOTSUP if there is no implementation for the particular device.
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* @retval any negative value on driver specific errors.
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*/
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__syscall int hwinfo_get_supported_reset_cause(uint32_t *supported);
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int z_impl_hwinfo_get_supported_reset_cause(uint32_t *supported);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#include <syscalls/hwinfo.h>
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#endif /* ZEPHYR_INCLUDE_DRIVERS_HWINFO_H_ */
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