fw/drivers/sf32lb52: sf32lb52 add watchdog

Signed-off-by: Jerrywang <[email protected]>

Author: w200024212

src/fw/drivers/sf32lb52/watchdog.c

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2025 Core Devices LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "drivers/watchdog.h"
+
+#include "util/bitset.h"
+#include "system/logging.h"
+#include <inttypes.h>
+#include "bf0_hal.h"
+
+#define WDT_RELOADER_TIMEOUT 3
+#define WDT_REBOOT_TIMEOUT 8
+
+static WDT_HandleTypeDef hwdt = {
+    .Instance = hwp_wdt1,
+};
+
+static int s_sys_freq = 0;
+static int s_irq_handle = 0;
+
+static HAL_StatusTypeDef wdt_set_timeout(WDT_HandleTypeDef *wdt, uint32_t reload_timeout) {
+  HAL_StatusTypeDef status;
+  wdt->Init.Reload = s_sys_freq * reload_timeout;
+  wdt->Init.Reload2 = s_sys_freq * WDT_REBOOT_TIMEOUT;
+
+  status = HAL_WDT_Init(wdt);
+  PBL_ASSERTN(status == HAL_OK);
+
+  __HAL_SYSCFG_Enable_WDT_REBOOT(1);
+  return HAL_OK;
+}
+
+void wdt_reconfig(void) {
+  HAL_WDT_Refresh(&hwdt);
+  __HAL_WDT_STOP(&hwdt);
+}
+
+void WDT_IRQHandler(void) {
+  if (s_irq_handle == 0) {
+    s_irq_handle = 1;
+    if (__HAL_SYSCFG_Get_Trigger_Assert_Flag() == 0) {
+      HAL_HPAON_WakeCore(CORE_ID_LCPU);
+      __HAL_SYSCFG_Trigger_Assert();
+    }
+    wdt_reconfig();
+  }
+}
+
+void watchdog_init(void) {
+  HAL_StatusTypeDef status;
+
+  if (HAL_PMU_LXT_ENABLED()) {
+    s_sys_freq = RC32K_FREQ;
+  } else {
+    s_sys_freq = RC10K_FREQ;
+  }
+
+  hwdt.Init.Reload = (uint32_t)WDT_RELOADER_TIMEOUT * s_sys_freq;
+  hwdt.Init.Reload2 = (uint32_t)WDT_REBOOT_TIMEOUT * s_sys_freq;
+  __HAL_WDT_STOP(&hwdt);
+  __HAL_WDT_INT(&hwdt, 1);
+
+  status = HAL_WDT_Init(&hwdt);
+  PBL_ASSERTN(status == HAL_OK);
+
+  __HAL_SYSCFG_Enable_WDT_REBOOT(1);
+  return;
+}
+
+void watchdog_start(void) { __HAL_WDT_START(&hwdt); }
+
+void watchdog_feed(void) { HAL_WDT_Refresh(&hwdt); }
+
+bool watchdog_check_reset_flag(void) { return (HAL_PMU_GET_WSR() & PMUC_WSR_WDT1) != 0; }
+
+McuRebootReason watchdog_clear_reset_flag(void) {
+  uint32_t wsr = HAL_PMU_GET_WSR();
+  uint32_t boot = SystemPowerOnModeGet();
+  HAL_PMU_CLEAR_WSR(0xFFFFFFFF);
+
+  McuRebootReason mcu_reboot_reason = {
+      .brown_out_reset = 0,
+      .pin_reset = (((wsr & PMUC_WSR_PIN0) != 0) || ((wsr & PMUC_WSR_PIN1) != 0)),
+      .power_on_reset = (boot & PM_COLD_BOOT) != 0,
+      .software_reset = (boot & PM_REBOOT_BOOT) != 0,
+      .independent_watchdog_reset = 0,
+      .window_watchdog_reset = (wsr & PMUC_WSR_WDT1) != 0,
+      .low_power_manager_reset = 0,
+  };
+
+  return mcu_reboot_reason;
+}

src/fw/drivers/wscript_build

@@ -1844,14 +1844,14 @@ elif mcu_family == 'NRF52840':
         ],
     )
 elif mcu_family == 'SF32LB52':
-    # FIXME(SF32LB52): provide working implementation
     bld.objects(
         name='driver_watchdog',
         source=[
-            'stubs/watchdog.c',
+            'sf32lb52/watchdog.c',
         ],
         use=[
             'fw_includes',
+            'root_includes',
         ],
     )