Add the up_systemreset interface to the samv7 arch. The approach is slightly different in that: 1) It enables ARCH_HAVE_RESET and allows the user to set if, and for how long, to drive External nRST signal. It also does not contain a default board_reset, as that really should be done in the config's src if CONFIG_BOARDCTL_RESET is defined.
This commit is contained in:
David Sidrane
Gregory Nutt
parent
fca329945b
commit
c41e6d823a
@ -618,6 +618,28 @@ config SAMV7_ERASE_ENABLE
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endchoice
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menuconfig SAMV7_SYSTEMRESET
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bool "Enable System Reset"
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select ARCH_HAVE_RESET
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---help---
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Enable up_systemreset
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if SAMV7_SYSTEMRESET
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config SAMV7_EXTRESET_ERST
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int "Drive External nRST duration"
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default 0
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range 0 16
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---help---
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Define if the external reset (nRST) will be generated in up_systemreset
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and for how long:
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- A value of 0 will not drive the external reset
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- A value of 1-6 will drive the external reset for 2^SAMV7_EXTRESET_ERST
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slow clock cycles.
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endif # SAMV7_SYSTEMRESET
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menuconfig SAMV7_GPIO_IRQ
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bool "GPIO pin interrupts"
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---help---
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@ -150,6 +150,10 @@ ifeq ($(CONFIG_SAMV7_RSWDT),y)
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CHIP_CSRCS += sam_rswdt.c
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endif
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ifeq ($(CONFIG_SAMV7_SYSTEMRESET),y)
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CHIP_CSRCS += sam_systemreset.c
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endif
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ifeq ($(CONFIG_SAMV7_SPI_MASTER),y)
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CHIP_CSRCS += sam_spi.c
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endif
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90
arch/arm/src/samv7/sam_systemreset.c
Normal file
90
arch/arm/src/samv7/sam_systemreset.c
Normal file
@ -0,0 +1,90 @@
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/****************************************************************************
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* arch/arm/src/samv7/sam_systemreset.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* David Sidrane <david_s5@nscdg.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 <stdint.h>
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#include <assert.h>
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#include <nuttx/board.h>
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#include <arch/samv7/chip.h>
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#include "up_arch.h"
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#include "chip/sam_rstc.h"
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#ifdef CONFIG_SAMV7_SYSTEMRESET
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/****************************************************************************
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* Public functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_systemreset
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*
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* Description:
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* Internal reset logic.
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*
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****************************************************************************/
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void up_systemreset(void)
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{
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uint32_t regval;
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#if defined(CONFIG_SAMV7_EXTRESET_ERST) && CONFIG_SAMV7_EXTRESET_ERST != 0
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uint32_t rstmr;
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#endif
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regval = (RSTC_CR_PROCRST | RSTC_CR_KEY);
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#if defined(CONFIG_SAMV7_EXTRESET_ERST) && CONFIG_SAMV7_EXTRESET_ERST != 0
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regval |= RSTC_CR_EXTRST;
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rstmr = gettreg32(SAM_RSTC_MR);
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rstmr &= ~RSTC_MR_ERSTL_MASK;
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rstmr &= RSTC_MR_ERSTL(CONFIG_SAMV7_EXTRESET_ERST) | RSTC_MR_KEY;
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putreg32(regval, SAM_RSTC_MR);
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#endif
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putreg32(regval, SAM_RSTC_CR);
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/* Wait for the reset */
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for (; ; );
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}
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#endif /* CONFIG_SAMV7_SYSTEMRESET */
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