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esp32c3: Add system reset.

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Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
This commit is contained in:
Abdelatif Guettouche 2021-02-19 11:55:39 +01:00 committed by Xiang Xiao
parent 48ff647fe9
commit fb68a4b777
7 changed files with 237 additions and 0 deletions
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1
arch/risc-v/Kconfig
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@ -57,6 +57,7 @@ config ARCH_CHIP_ESP32C3
select ARCH_RV32IM
select RV32IM_HW_MULDIV
select ARCH_VECNOTIRQ
select ARCH_HAVE_RESET
---help---
Espressif ESP32-C3 (RV32IMC).

1
arch/risc-v/src/esp32c3/Make.defs
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@ -53,6 +53,7 @@ CHIP_CSRCS = esp32c3_allocateheap.c esp32c3_start.c esp32c3_idle.c
CHIP_CSRCS += esp32c3_irq.c esp32c3_timerisr.c
CHIP_CSRCS += esp32c3_clockconfig.c esp32c3_gpio.c
CHIP_CSRCS += esp32c3_lowputc.c
CHIP_CSRCS += esp32c3_systemreset.c esp32c3_resetcause.c
ifeq ($(CONFIG_ESP32C3_UART),y)
CHIP_CSRCS += esp32c3_serial.c

60
arch/risc-v/src/esp32c3/esp32c3_resetcause.c Normal file
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@ -0,0 +1,60 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/esp32c3_resetcause.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#include "hardware/esp32c3_rtccntl.h"
#include "esp32c3.h"
#include "esp32c3_resetcause.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: esp32c3_resetcause
*
* Description:
* Get the cause of the last reset.
*
****************************************************************************/
enum esp32c3_resetcause_e esp32c3_resetcause(void)
{
uint32_t regmask;
uint32_t regshift;
uint32_t regval;
regval = getreg32(RTC_CNTL_RESET_STATE_REG);
regmask = RTC_CNTL_RESET_CAUSE_PROCPU_M;
regshift = RTC_CNTL_RESET_CAUSE_PROCPU_S;
return (regval & regmask) >> regshift;
}

54
arch/risc-v/src/esp32c3/esp32c3_resetcause.h Normal file
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@ -0,0 +1,54 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/esp32c3_resetcause.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
enum esp32c3_resetcause_e
{
ESP32C3_RESETCAUSE_SYS_CHIPPOR = 0x01,
ESP32C3_RESETCAUSE_SYS_RWDTSR = 0x10,
ESP32C3_RESETCAUSE_SYS_BOR = 0x0f,
ESP32C3_RESETCAUSE_CORE_SOFT = 0x03,
ESP32C3_RESETCAUSE_CORE_DPSP = 0x05,
ESP32C3_RESETCAUSE_CORE_MWDT0 = 0x07,
ESP32C3_RESETCAUSE_CORE_MWDT1 = 0x08,
ESP32C3_RESETCAUSE_CORE_RWDT = 0x09,
ESP32C3_RESETCAUSE_CPU_MWDT0 = 0x0b,
ESP32C3_RESETCAUSE_CPU_SOFT = 0x0c,
ESP32C3_RESETCAUSE_CPU_RWDT = 0x0d,
ESP32C3_RESETCAUSE_CPU_PROCPU = 0x0e
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: esp32c3_resetcause
*
* Description:
* Get the cause of the last reset.
*
****************************************************************************/
enum esp32c3_resetcause_e esp32c3_resetcause(void);

54
arch/risc-v/src/esp32c3/esp32c3_systemreset.c Normal file
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@ -0,0 +1,54 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/esp32c3_systemreset.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#include "hardware/esp32c3_rtccntl.h"
#include "esp32c3.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_systemreset
*
* Description:
* Internal reset logic.
*
****************************************************************************/
void up_systemreset(void)
{
putreg32(RTC_CNTL_SW_SYS_RST, RTC_CNTL_OPTIONS0_REG);
/* Wait for the reset */
for (; ; );
}

4
boards/risc-v/esp32c3/esp32c3-devkit/src/Makefile
View File

@ -28,6 +28,10 @@ CSRCS = esp32c3_boot.c esp32c3_bringup.c
ifeq ($(CONFIG_LIB_BOARDCTL),y)
CSRCS += esp32c3_appinit.c
ifeq ($(CONFIG_BOARDCTL_RESET),y)
CSRCS += esp32c3_reset.c
endif
endif
ifeq ($(CONFIG_DEV_GPIO),y)

63
boards/risc-v/esp32c3/esp32c3-devkit/src/esp32c3_reset.c Normal file
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@ -0,0 +1,63 @@
/****************************************************************************
* boards/risc-v/esp32c3/esp32c3-devkit/src/esp32c3_reset.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#ifdef CONFIG_BOARDCTL_RESET
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_reset
*
* Description:
* Reset board. Support for this function is required by board-level
* logic if CONFIG_BOARDCTL_RESET is selected.
*
* Input Parameters:
* status - Status information provided with the reset event. This
* meaning of this status information is board-specific. If not
* used by a board, the value zero may be provided in calls to
* board_reset().
*
* Returned Value:
* If this function returns, then it was not possible to power-off the
* board due to some constraints. The return value in this case is a
* board-specific reason for the failure to shutdown.
*
****************************************************************************/
int board_reset(int status)
{
up_systemreset();
return 0;
}
#endif /* CONFIG_BOARDCTL_RESET */