--- /dev/null
+/****************************************************************************
+ *
+ * Copyright 2017 Samsung Electronics All Rights Reserved.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+/****************************************************************************
+ * arch/arm/include/s5j/s5j_watchdog.h
+ *
+ * Copyright (C) 2009, 2013, 2015 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_ARM_INC_S5J_S5J_WATCHDOG_H
+#define __ARCH_ARM_INC_S5J_S5J_WATCHDOG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+void s5j_watchdog_disable(void);
+
+#ifdef CONFIG_S5J_WATCHDOG
+void s5j_watchdog_enable(void);
+void s5j_watchdog_reset_disable(void);
+void s5j_watchdog_reset_enable(void);
+void s5j_watchdog_irq_disable(void);
+void s5j_watchdog_irq_enable(void);
+void s5j_watchdog_clk_set(unsigned int prescaler, unsigned int divider);
+void s5j_watchdog_set_reload_val(unsigned int reload_val);
+unsigned int s5j_watchdog_get_curr(void);
+void s5j_watchdog_set_curr(unsigned int curr_val);
+void s5j_watchdog_clear_int(void);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_ARM_INC_S5J_S5J_WATCHDOG_H */
--- /dev/null
+/****************************************************************************
+ *
+ * Copyright 2016 Samsung Electronics All Rights Reserved.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+/****************************************************************************
+ * arch/arm/src/s5j/s5j_watchdog.c
+ *
+ * Copyright (C) 2014-2016 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * The Samsung sample code has a BSD compatible license that requires this
+ * copyright notice:
+ *
+ * Copyright (c) 2016 Samsung Electronics, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+#include <stdio.h>
+#include <stddef.h>
+#include <sys/types.h>
+#include <string.h>
+
+#include "up_arch.h"
+
+#include <arch/chip/chip_types.h>
+#include <arch/chip/s5j_watchdog.h>
+#include <arch/irq.h>
+#include <chip.h>
+#include <tinyara/clock.h>
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define WTCON 0x0000
+#define WTDAT 0x0004
+#define WTCNT 0x0008
+#define WTCLRINT 0x000C
+
+#define WTCON_RESET_MASK (1 << 0)
+#define WTCON_RESET_DIS (0 << 0)
+#define WTCON_RESET_EN (1 << 0)
+
+#define WTCON_IRQ_MASK (1 << 2)
+#define WTCON_IRQ_DIS (0 << 2)
+#define WTCON_IRQ_EN (1 << 2)
+
+#define WTCON_CLK_DIV_MASK (3 << 3)
+#define WTCON_CLK_DIV(x) ((x & 3) << 3)
+
+#define WTCON_EN_MASK (1 << 5)
+#define WTCON_DIS (0 << 5)
+#define WTCON_EN (1 << 5)
+
+#define WTCON_PRESCALER_MASK (0xF << 8)
+#define WTCON_PRESCALER(x) ((x & 0xF) << 8)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: s5j_watchdog_disable
+ *
+ * Description:
+ * Disable the watchdog timer. The S5J always boots with the watchdog
+ * timer enabled at timeout of 10 - 20 seconds by the second stage boot
+ * loader to detect any boot failure. So, the watchdog timer must be
+ * disabled as part of the start up logic.
+ *
+ ****************************************************************************/
+void s5j_watchdog_disable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_EN_MASK) | WTCON_DIS;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+#ifdef CONFIG_S5J_WATCHDOG
+/****************************************************************************
+ * Name: s5j_watchdog_enable
+ *
+ * Description:
+ * Enable watchdog operation.
+ * Should be correctly configured before enabling.
+ *
+ ****************************************************************************/
+void s5j_watchdog_enable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_EN_MASK) | WTCON_EN;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_reset_disable
+ *
+ * Description:
+ * When WD timer expires, it can issue HW reset.
+ * This function disables reset feature.
+ * Watchdog will be reloaded with value written in reload register.
+ * and continue its operation.
+ *
+ ****************************************************************************/
+void s5j_watchdog_reset_disable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_RESET_MASK) | WTCON_RESET_DIS;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_reset_enable
+ *
+ * Description:
+ * When WD timer expires, it can issue HW reset.
+ * This function enables reset feature.
+ *
+ ****************************************************************************/
+void s5j_watchdog_reset_enable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_RESET_MASK) | WTCON_RESET_EN;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_irq_disable
+ *
+ * Description:
+ * When WD timer expires, it can issue interrupt.
+ * This function disables reset feature.
+ *
+ ****************************************************************************/
+void s5j_watchdog_irq_disable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_IRQ_MASK) | WTCON_IRQ_DIS;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_irq_enable
+ *
+ * Description:
+ * When WD timer expires, it can issue interrupt.
+ * This function enables reset feature.
+ *
+ ****************************************************************************/
+void s5j_watchdog_irq_enable(void)
+{
+ unsigned int wtcon = (getreg32(S5J_WDT_BASE + WTCON) & ~WTCON_IRQ_MASK) | WTCON_IRQ_EN;
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_clk_set
+ *
+ * Description:
+ * WD timer clock can be defined by prescaler and divider.
+ * WD frequency can be calculated by next equation:
+ * WD_CLK = CLK_IN/((prescaler+1)*divider)
+ * Where:
+ * CLK_IN - input clock frequency (by default 26MHz),
+ * prescaler - 8 bit value 0~255,
+ * divider - 2 bit division factor,
+ * encoding 0 - 16, 1 - 32, 2 - 64, 3 - 128 division ratios.
+ *
+ ****************************************************************************/
+void s5j_watchdog_clk_set(unsigned int prescaler, unsigned int divider)
+{
+ unsigned int wtcon = getreg32(S5J_WDT_BASE + WTCON);
+
+ wtcon &= ~(WTCON_PRESCALER_MASK | WTCON_CLK_DIV_MASK);
+ wtcon |= WTCON_CLK_DIV(divider) | WTCON_PRESCALER(prescaler);
+
+ putreg32(wtcon, S5J_WDT_BASE + WTCON);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_set_reload_val
+ *
+ * Description:
+ * When WD timer expires, if reset is disabled, will be reloaded with value
+ * defined by this function call.
+ *
+ ****************************************************************************/
+void s5j_watchdog_set_reload_val(unsigned int reload_val)
+{
+ putreg32(reload_val, S5J_WDT_BASE + WTDAT);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_get_curr
+ *
+ * Description:
+ * Function s5j_watchdog_get_curr returns current WD counter value.
+ ****************************************************************************/
+unsigned int s5j_watchdog_get_curr(void)
+{
+ return getreg32(S5J_WDT_BASE + WTCNT);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_set_curr
+ *
+ * Description:
+ * Function s5j_watchdog_set_curr sets immediately current WD counter value.
+ * Use this function to set initial WD timer value before running operation.
+ ****************************************************************************/
+void s5j_watchdog_set_curr(unsigned int curr_val)
+{
+ putreg32(curr_val, S5J_WDT_BASE + WTCNT);
+}
+
+/****************************************************************************
+ * Name: s5j_watchdog_clear_int
+ *
+ * Description:
+ * Function s5j_watchdog_clear_int clears pending interrupt flag.
+ * Used after WD IRQ service routine completes its operation.
+ ****************************************************************************/
+void s5j_watchdog_clear_int(void)
+{
+ putreg32(0xffffffff, S5J_WDT_BASE + WTCLRINT);
+}
+#endif
projects / rtos / tinyara.git / commitdiff