| /* 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_ERR("Pausing watchdog by debugger is not supported."); |
| return -ENOTSUP; |
| } |
| |
| if (options & WDT_OPT_PAUSE_IN_SLEEP) { |
| LOG_ERR("Pausing watchdog in sleep is not supported."); |
| return -ENOTSUP; |
| } |
| |
| 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; |
| } |
| |
| int dw_wdt_disable(const struct device *dev) |
| { |
| return -ENOTSUP; |
| } |