mirror of
https://github.com/apache/nuttx.git
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arch/arm/src/am335x: Add minimal wdog logic needed to disable the watchdog timer. Otherwise, the board is rebooted after certain time expires while NuttX is running.
This commit is contained in:
Petro Karashchenko
committed by
Gregory Nutt
Gregory Nutt
parent
dc5d18a092
commit
dc92cd42e6
@@ -129,7 +129,7 @@ CHIP_ASRCS =
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# AM335x-specific C source files
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CHIP_CSRCS = am335x_boot.c am335x_clockconfig.c am335x_pinmux.c am335x_irq.c
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CHIP_CSRCS += am335x_gpio.c am335x_lowputc.c am335x_serial.c
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CHIP_CSRCS += am335x_gpio.c am335x_lowputc.c am335x_serial.c am335x_wdog.c
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ifneq ($(CONFIG_SCHED_TICKLESS),y)
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CHIP_CSRCS += am335x_timerisr.c
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@@ -58,6 +58,7 @@
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#include "up_arch.h"
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#include "am335x_clockconfig.h"
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#include "am335x_wdog.h"
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#include "am335x_lowputc.h"
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#include "am335x_boot.h"
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@@ -406,6 +407,10 @@ void arm_boot(void)
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arm_fpuconfig();
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#endif
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/* Disable CPU Watchdog */
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am335x_wdog_disable_all();
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/* Perform board-specific memory initialization, This must include
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* initialization of board-specific memory resources (e.g., SDRAM)
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*
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@@ -0,0 +1,71 @@
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/****************************************************************************
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* arch/arm/src/am335x/am335x_wdog.c
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*
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* Copyright (C) 2019 Petro Karashchenko. All rights reserved.
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* Author: Petro Karashchenko <petro.karashchenko@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/irq.h>
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#include "up_arch.h"
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#include "chip/am335x_wdog.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: am335x_wdog_disable
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*
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* Description:
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* Called at the very beginning of _start. Disables all watchdogs
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*
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****************************************************************************/
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void am335x_wdog_disable_all(void)
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{
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putreg32(WDT_WSPR_STOP_FEED_A, AM335X_WDT_WSPR);
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while((getreg32(AM335X_WDT_WWPS) & WDT_WWPS_W_PEND_WSPR) != 0)
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{
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}
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putreg32(WDT_WSPR_STOP_FEED_B, AM335X_WDT_WSPR);
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while((getreg32(AM335X_WDT_WWPS) & WDT_WWPS_W_PEND_WSPR) != 0)
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{
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}
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}
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@@ -0,0 +1,72 @@
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/****************************************************************************
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* arch/arm/src/am335x/am335x_wdog.h
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*
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* Copyright (C) 2019 Petro Karashchenko. All rights reserved.
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* Author: Petro Karashchenko <petro.karashchenko@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_AM335X_AM335X_WDOG_H
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#define __ARCH_ARM_SRC_AM335X_AM335X_WDOG_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "up_internal.h"
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#include "chip.h"
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#include "chip/am335x_wdog.h"
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: am335x_wdog_disable
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*
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* Description:
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* Called at the very beginning of _start. Disables all watchdogs
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*
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****************************************************************************/
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void am335x_wdog_disable_all(void);
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#endif /* __ARCH_ARM_SRC_AM335X_AM335X_WDOG_H */
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@@ -0,0 +1,133 @@
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/************************************************************************************
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* arch/arm/src/am335x/chip/am335x_wdog.h
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*
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* Copyright (C) 2019 Petro Karashchenko. All rights reserved.
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* Author: Petro Karashchenko <petro.karashchenko@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_AM335X_CHIP_AM335X_WDOG_H
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#define __ARCH_ARM_SRC_AM335X_CHIP_AM335X_WDOG_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include "chip/am335x_memorymap.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Register offsets *****************************************************************/
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#define AM335X_WDT_WIDR_OFFSET 0x0000 /* Watchdog Identification Register */
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#define AM335X_WDT_WDSC_OFFSET 0x0010 /* Watchdog System Control Register */
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#define AM335X_WDT_WDST_OFFSET 0x0014 /* Watchdog Status Register */
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#define AM335X_WDT_WISR_OFFSET 0x0018 /* Watchdog Interrupt Status Register */
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#define AM335X_WDT_WIER_OFFSET 0x001C /* Watchdog Interrupt Enable Register */
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#define AM335X_WDT_WCLR_OFFSET 0x0024 /* Watchdog Control Register */
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#define AM335X_WDT_WCRR_OFFSET 0x0028 /* Watchdog Counter Register */
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#define AM335X_WDT_WLDR_OFFSET 0x002C /* Watchdog Load Register */
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#define AM335X_WDT_WTGR_OFFSET 0x0030 /* Watchdog Trigger Register */
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#define AM335X_WDT_WWPS_OFFSET 0x0034 /* Watchdog Write Posting Bits Register */
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#define AM335X_WDT_WDLY_OFFSET 0x0044 /* Watchdog Delay Configuration Register */
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#define AM335X_WDT_WSPR_OFFSET 0x0048 /* Watchdog Start/Stop Register */
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#define AM335X_WDT_WIRQSTATRAW_OFFSET 0x0054 /* Watchdog Raw Interrupt Status Register */
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#define AM335X_WDT_WIRQSTAT_OFFSET 0x0058 /* Watchdog Interrupt Status Register */
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#define AM335X_WDT_WIRQENSET_OFFSET 0x005C /* Watchdog Interrupt Enable Set Register */
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#define AM335X_WDT_WIRQENCLR_OFFSET 0x0060 /* Watchdog Interrupt Enable Clear Register */
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/* Register addresses ***************************************************************/
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#define AM335X_WDT_WIDR (AM335X_WDT1_VADDR + AM335X_WDT_WIDR_OFFSET)
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#define AM335X_WDT_WDSC (AM335X_WDT1_VADDR + AM335X_WDT_WDSC_OFFSET)
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#define AM335X_WDT_WDST (AM335X_WDT1_VADDR + AM335X_WDT_WDST_OFFSET)
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#define AM335X_WDT_WISR (AM335X_WDT1_VADDR + AM335X_WDT_WISR_OFFSET)
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#define AM335X_WDT_WIER (AM335X_WDT1_VADDR + AM335X_WDT_WIER_OFFSET)
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#define AM335X_WDT_WCLR (AM335X_WDT1_VADDR + AM335X_WDT_WCLR_OFFSET)
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#define AM335X_WDT_WCRR (AM335X_WDT1_VADDR + AM335X_WDT_WCRR_OFFSET)
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#define AM335X_WDT_WLDR (AM335X_WDT1_VADDR + AM335X_WDT_WLDR_OFFSET)
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#define AM335X_WDT_WTGR (AM335X_WDT1_VADDR + AM335X_WDT_WTGR_OFFSET)
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#define AM335X_WDT_WWPS (AM335X_WDT1_VADDR + AM335X_WDT_WWPS_OFFSET)
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#define AM335X_WDT_WDLY (AM335X_WDT1_VADDR + AM335X_WDT_WDLY_OFFSET)
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#define AM335X_WDT_WSPR (AM335X_WDT1_VADDR + AM335X_WDT_WSPR_OFFSET)
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#define AM335X_WDT_WIRQSTATRAW (AM335X_WDT1_VADDR + AM335X_WDT_WIRQSTATRAW_OFFSET)
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#define AM335X_WDT_WIRQSTAT (AM335X_WDT1_VADDR + AM335X_WDT_WIRQSTAT_OFFSET)
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#define AM335X_WDT_WIRQENSET (AM335X_WDT1_VADDR + AM335X_WDT_WIRQENSET_OFFSET)
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#define AM335X_WDT_WIRQENCLR (AM335X_WDT1_VADDR + AM335X_WDT_WIRQENCLR_OFFSET)
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/* Register bit definitions *********************************************************/
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/* Watchdog System Control Register */
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#define WDT_WDSC_SOFTRESET (1 << 1) /* Bit 1: Watchdog Software Reset */
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#define WDT_WDSC_IDLEMODE_SHIFT (3) /* Bit 3-4: Watchdog Idle Mode */
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# define WDT_WDSC_IDLEMODE_FORCE (0 << WDT_WDSC_IDLEMODE_SHIFT) /* Force-idle Mode */
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# define WDT_WDSC_IDLEMODE_NO (1 << WDT_WDSC_IDLEMODE_SHIFT) /* No-idle Mode */
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# define WDT_WDSC_IDLEMODE_SMART (2 << WDT_WDSC_IDLEMODE_SHIFT) /* Smart-idle Mode */
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# define WDT_WDSC_IDLEMODE_SMART_WKUP (3 << WDT_WDSC_IDLEMODE_SHIFT) /* Smart-idle Wakeup-capable Mode */
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#define WDT_WDSC_EMUFREE (1 << 5) /* Bit 5: Watchdog DEBUG Disable */
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/* Watchdog Status Register */
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#define WDT_WDST_RESETDONE (1 << 0) /* Bit 0: Watchdog Reset Completed */
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/* Watchdog Interrupt Registers */
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#define WDT_IRQ_FLAG_OVERFLOW (1 << 0) /* Bit 0: Overflow Interrupt Pending */
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#define WDT_IRQ_FLAG_DELAY (1 << 1) /* Bit 1: Delay Interrupt Pending */
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/* Watchdog Control Register */
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#define WDT_WCLR_PTV_SHIFT (2) /* Bits 2-4: Prescaler Value */
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#define WDT_WCLR_PTV_MASK (7 << WDT_WCLR_PTV_SHIFT)
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# define WDT_WCLR_PTV(n) ((uint32_t)(n) << WDT_WCLR_PTV_SHIFT)
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#define WDT_WCLR_PRE_ENABLE (1 << 5) /* Bit 5: Prescaler Enabled */
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/* Watchdog Write Posting Bits Register */
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#define WDT_WWPS_W_PEND_WCLR (1 << 0) /* Bit 0: Write Pending for Register WCLR */
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#define WDT_WWPS_W_PEND_WCRR (1 << 1) /* Bit 1: Write pending for register WCRR */
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#define WDT_WWPS_W_PEND_WLDR (1 << 2) /* Bit 2: Write pending for register WLDR */
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#define WDT_WWPS_W_PEND_WTGR (1 << 3) /* Bit 3: Write pending for register WTGR */
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#define WDT_WWPS_W_PEND_WSPR (1 << 4) /* Bit 4: Write pending for register WSPR */
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#define WDT_WWPS_W_PEND_WDLY (1 << 5) /* Bit 5: Write pending for register WDLY */
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/* Watchdog Start/Stop Register */
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#define WDT_WSPR_START_FEED_A (0x0000bbbb)
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#define WDT_WSPR_START_FEED_B (0x00004444)
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#define WDT_WSPR_STOP_FEED_A (0x0000aaaa)
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#define WDT_WSPR_STOP_FEED_B (0x00005555)
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#endif /* __ARCH_ARM_SRC_AM335X_CHIP_AM335X_WDOG_H */
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