Add support for the EFM32 reset management unit (RMU). From Pierre-noel Bouteville
This commit is contained in:
Gregory Nutt
parent
e02ced8c98
commit
2f3fb08869
@ -128,6 +128,10 @@ config EFM32_DMA
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default n
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select ARCH_DMA
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config EFM32_RMU
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bool "Reset Management Unit (RMU) "
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default n
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config EFM32_USART0
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bool "USART0"
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default n
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@ -111,6 +111,10 @@ CHIP_CSRCS += efm32_serial.c
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endif
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endif
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ifeq ($(CONFIG_EFM32_RMU),y)
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CHIP_CSRCS += efm32_rmu.c
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endif
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ifeq ($(CONFIG_EFM32_USART_ISSPI),y)
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CHIP_CSRCS += efm32_spi.c
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endif
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125
arch/arm/src/efm32/efm32_rmu.c
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125
arch/arm/src/efm32/efm32_rmu.c
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@ -0,0 +1,125 @@
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/************************************************************************************
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* arch/arm/src/efm32/efm32_rmu.c
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*
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* Copyright (C) 2015 Pierre-Noel Bouteville. All rights reserved.
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* Author: Pierre-Noel Bouteville <pnb990@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 <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <errno.h>
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#include <nuttx/arch.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "chip/efm32_emu.h"
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#include "chip/efm32_rmu.h"
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#include "emf32_rmu.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/************************************************************************************
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* Private Types
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************************************************************************************/
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/************************************************************************************
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* Private Data
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/* Variable old last reset cause of cpu. */
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uint32_t g_efm32_rstcause;
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: efm32_rmu_initialize
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*
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* Description:
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* Store reset cause into g_efm32_rstcause then clear reset cause register.
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*
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************************************************************************************/
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void efm32_rmu_initialize(void)
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{
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uint32_t locked;
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g_efm32_rstcause = getreg32(EFM32_RMU_RSTCAUSE);
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/* Now clear reset cause */
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putreg32(RMU_CMD_RCCLR,EFM32_RMU_CMD);
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/* Clear some reset causes not cleared with RMU CMD register
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* (If EMU registers locked, they must be unlocked first)
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*/
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locked = getreg32(EFM32_EMU_LOCK) & EMU_LOCK_LOCKKEY_LOCKED;
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if (locked)
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{
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/* EMU unlock */
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putreg32(EMU_LOCK_LOCKKEY_LOCK,EMU_LOCK_LOCKKEY_UNLOCK);
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}
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modifyreg32(EFM32_EMU_AUXCTRL,0,EMU_AUXCTRL_HRCCLR);
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modifyreg32(EFM32_EMU_AUXCTRL,EMU_AUXCTRL_HRCCLR,0);
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if (locked)
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{
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/* EMU lock */
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putreg32(EMU_LOCK_LOCKKEY_LOCK,EMU_LOCK_LOCKKEY_LOCK);
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}
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}
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68
arch/arm/src/efm32/efm32_rmu.h
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68
arch/arm/src/efm32/efm32_rmu.h
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@ -0,0 +1,68 @@
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/*****************************************************************************
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* arch/arm/src/efm32/efm32_rmu.h
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*
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* Copyright (C) 2015 Pierre-noel Bouteville . All rights reserved.
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* Authors: Pierre-noel Bouteville <pnb990@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_EFM32_EFM32_RMU_H
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#define __ARCH_ARM_SRC_EFM32_EFM32_RMU_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/efm32_rmu.h"
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#ifdef CONFIG_EFM32_RMU
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern uint32_t g_efm32_rstcause;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/************************************************************************************
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* Name: efm32_rmu_initialize
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*
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* Description:
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* Store reset cause into g_efm32_rstcause then clear reset cause register.
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*
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************************************************************************************/
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void efm32_rmu_initialize(void);
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#endif /* CONFIG_EFM32_RMU */
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#endif /* __ARCH_ARM_SRC_EFM32_EFM32_RMU_H */
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