intel: Enable watchdog timer on Intel S10 platform
Watchdog driver support & enablement during platform setup
Signed-off-by: Muhammad Hadi Asyrafi Abdul Halim <muhammad.hadi.asyrafi.abdul.halim@intel.com>
diff --git a/plat/intel/soc/stratix10/drivers/wdt/watchdog.c b/plat/intel/soc/stratix10/drivers/wdt/watchdog.c
new file mode 100644
index 0000000..b4dbe5f
--- /dev/null
+++ b/plat/intel/soc/stratix10/drivers/wdt/watchdog.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2019, Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <platform_def.h>
+
+#include "watchdog.h"
+
+
+/* Reset watchdog timer */
+void watchdog_sw_rst(void)
+{
+ mmio_write_32(WDT_CRR, WDT_SW_RST);
+}
+
+/* Print component information */
+void watchdog_info(void)
+{
+ INFO("Component Type : %x\r\n", mmio_read_32(WDT_COMP_VERSION));
+ INFO("Component Version : %x\r\n", mmio_read_32(WDT_COMP_TYPE));
+}
+
+/* Check watchdog current status */
+void watchdog_status(void)
+{
+ if (mmio_read_32(WDT_CR) & 1) {
+ INFO("Watchdog Timer in currently enabled\n");
+ INFO("Current Counter : 0x%x\r\n", mmio_read_32(WDT_CCVR));
+ } else {
+ INFO("Watchdog Timer in currently disabled\n");
+ }
+}
+
+/* Initialize & enable watchdog */
+void watchdog_init(int watchdog_clk)
+{
+ uint8_t cycles_i = 0;
+ uint32_t wdt_cycles = WDT_MIN_CYCLES;
+ uint32_t top_init_cycles = WDT_PERIOD * watchdog_clk;
+
+ while ((cycles_i < 15) && (wdt_cycles < top_init_cycles)) {
+ wdt_cycles = (wdt_cycles << 1);
+ cycles_i++;
+ }
+
+ mmio_write_32(WDT_TORR, (cycles_i << 4) | cycles_i);
+
+ watchdog_enable();
+}
+
+void watchdog_enable(void)
+{
+ mmio_write_32(WDT_CR, WDT_CR_RMOD|WDT_CR_EN);
+}
diff --git a/plat/intel/soc/stratix10/drivers/wdt/watchdog.h b/plat/intel/soc/stratix10/drivers/wdt/watchdog.h
new file mode 100644
index 0000000..e920236
--- /dev/null
+++ b/plat/intel/soc/stratix10/drivers/wdt/watchdog.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2019, Intel Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __CAD_WATCHDOG_H__
+#define __CAD_WATCHDOG_H__
+
+#define WDT_BASE (0xFFD00200)
+#define WDT_REG_SIZE_OFFSET (0x4)
+#define WDT_MIN_CYCLES (65536)
+#define WDT_PERIOD (20)
+
+#define WDT_CR (WDT_BASE + 0x0)
+#define WDT_TORR (WDT_BASE + 0x4)
+
+#define WDT_CRR (WDT_BASE + 0xC)
+
+#define WDT_CCVR (WDT_BASE + 0x8)
+#define WDT_STAT (WDT_BASE + 0x10)
+#define WDT_EOI (WDT_BASE + 0x14)
+
+#define WDT_COMP_PARAM_1 (WDT_BASE + 0xF4)
+#define WDT_COMP_VERSION (WDT_BASE + 0xF8)
+#define WDT_COMP_TYPE (WDT_BASE + 0XFC)
+
+#define WDT_CR_RMOD (0x0)
+#define WDT_CR_EN (0x1)
+
+#define WDT_SW_RST (0x76)
+
+
+void watchdog_init(int watchdog_clk);
+void watchdog_enable(void);
+void watchdog_info(void);
+void watchdog_status(void);
+void watchdog_sw_rst(void);
+
+#endif