75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
|
|
* Copyright (c) 2022 Yonatan Schachter
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <drivers/hwinfo.h>
|
|
#include <hardware/flash.h>
|
|
#include <hardware/structs/vreg_and_chip_reset.h>
|
|
|
|
#define FLASH_RUID_DATA_BYTES 8
|
|
|
|
#define HAD_RUN_BIT BIT(VREG_AND_CHIP_RESET_CHIP_RESET_HAD_RUN_LSB)
|
|
#define HAD_PSM_RESTART_BIT BIT(VREG_AND_CHIP_RESET_CHIP_RESET_HAD_PSM_RESTART_LSB)
|
|
#define HAD_POR_BIT BIT(VREG_AND_CHIP_RESET_CHIP_RESET_HAD_POR_LSB)
|
|
|
|
ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
|
|
{
|
|
uint8_t id[FLASH_RUID_DATA_BYTES];
|
|
uint32_t key;
|
|
|
|
/*
|
|
* flash_get_unique_id temporarily disables XIP to query the
|
|
* flash for its ID. If the CPU is interrupted while XIP is
|
|
* disabled, it will halt. Therefore, interrupts must be disabled
|
|
* before fetching the ID.
|
|
*/
|
|
key = irq_lock();
|
|
flash_get_unique_id(id);
|
|
irq_unlock(key);
|
|
|
|
if (length > sizeof(id)) {
|
|
length = sizeof(id);
|
|
}
|
|
memcpy(buffer, id, length);
|
|
|
|
return length;
|
|
}
|
|
|
|
int z_impl_hwinfo_get_reset_cause(uint32_t *cause)
|
|
{
|
|
uint32_t flags = 0;
|
|
uint32_t reset_register = vreg_and_chip_reset_hw->chip_reset;
|
|
|
|
if (reset_register & HAD_POR_BIT) {
|
|
flags |= RESET_POR;
|
|
}
|
|
|
|
if (reset_register & HAD_RUN_BIT) {
|
|
flags |= RESET_PIN;
|
|
}
|
|
|
|
if (reset_register & HAD_PSM_RESTART_BIT) {
|
|
flags |= RESET_DEBUG;
|
|
}
|
|
|
|
*cause = flags;
|
|
return 0;
|
|
}
|
|
|
|
int z_impl_hwinfo_clear_reset_cause(void)
|
|
{
|
|
/* The reset register can't be modified, nothing to do. */
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int z_impl_hwinfo_get_supported_reset_cause(uint32_t *supported)
|
|
{
|
|
*supported = RESET_PIN | RESET_DEBUG | RESET_POR;
|
|
|
|
return 0;
|
|
}
|