104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/* SPDX-License-Identifier: Apache-2.0 */
|
|
/*
|
|
* Copyright (c) 2023 Intel Corporation
|
|
*
|
|
* Author: Adrian Warecki <adrian.warecki@intel.com>
|
|
*/
|
|
|
|
#include <zephyr/drivers/watchdog.h>
|
|
#include <zephyr/logging/log.h>
|
|
#include <zephyr/sys_clock.h>
|
|
#include <zephyr/math/ilog2.h>
|
|
|
|
#include "wdt_dw_common.h"
|
|
#include "wdt_dw.h"
|
|
|
|
LOG_MODULE_REGISTER(wdt_dw_common, CONFIG_WDT_LOG_LEVEL);
|
|
|
|
#define WDT_DW_FLAG_CONFIGURED 0x80000000
|
|
|
|
int dw_wdt_check_options(const uint8_t options)
|
|
{
|
|
if (options & WDT_OPT_PAUSE_HALTED_BY_DBG) {
|
|
LOG_WRN("Pausing watchdog by debugger is not configurable");
|
|
}
|
|
|
|
if (options & WDT_OPT_PAUSE_IN_SLEEP) {
|
|
LOG_WRN("Pausing watchdog in sleep is not configurable");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dw_wdt_configure(const uint32_t base, const uint32_t config)
|
|
{
|
|
uint32_t period;
|
|
|
|
if (!(config & WDT_DW_FLAG_CONFIGURED)) {
|
|
LOG_ERR("Timeout not installed.");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Configure timeout */
|
|
period = config & ~WDT_DW_FLAG_CONFIGURED;
|
|
|
|
if (dw_wdt_dual_timeout_period_get(base)) {
|
|
dw_wdt_timeout_period_init_set(base, period);
|
|
}
|
|
|
|
dw_wdt_timeout_period_set(base, period);
|
|
|
|
/* Enable watchdog */
|
|
dw_wdt_enable(base);
|
|
dw_wdt_counter_restart(base);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dw_wdt_calc_period(const uint32_t base, const uint32_t clk_freq,
|
|
const struct wdt_timeout_cfg *config, uint32_t *period_out)
|
|
{
|
|
uint64_t period64;
|
|
uint32_t period;
|
|
|
|
/* Window timeout is not supported by this driver */
|
|
if (config->window.min) {
|
|
LOG_ERR("Window timeout is not supported.");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
period64 = (uint64_t)clk_freq * config->window.max;
|
|
period64 /= 1000;
|
|
if (!period64 || (period64 >> 31)) {
|
|
LOG_ERR("Window max is out of range.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
period = period64 - 1;
|
|
period = ilog2(period);
|
|
|
|
if (period >= dw_wdt_cnt_width_get(base)) {
|
|
LOG_ERR("Watchdog timeout too long.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* The minimum counter value is 64k, maximum 2G */
|
|
*period_out = WDT_DW_FLAG_CONFIGURED | (period >= 15 ? period - 15 : 0);
|
|
return 0;
|
|
}
|
|
|
|
int dw_wdt_probe(const uint32_t base, const uint32_t reset_pulse_length)
|
|
{
|
|
/* Check component type */
|
|
const uint32_t type = dw_wdt_comp_type_get(base);
|
|
|
|
if (type != WDT_COMP_TYPE_VALUE) {
|
|
LOG_ERR("Invalid component type %x", type);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dw_wdt_reset_pulse_length_set(base, reset_pulse_length);
|
|
|
|
return 0;
|
|
}
|