117 lines
4.6 KiB
C
117 lines
4.6 KiB
C
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/************************************************************************************
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* configs/stm3210e-eval/src/up_extcontext.c
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* arch/arm/src/board/up_extcontext.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <assert.h>
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#include <debug.h>
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#include "up_arch.h"
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#include "stm32_gpio.h"
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#include "stm3210e-internal.h"
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#ifdef CONFIG_STM32_FSMC
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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#if STM32_NGPIO_PORTS < 6
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# error "Required GPIO ports not enabled"
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#endif
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/************************************************************************************
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* Private Data
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************************************************************************************/
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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: stm32_extcontextsave
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*
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* Description:
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* Save current GPIOs that will used by external memory configurations
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*
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************************************************************************************/
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void stm32_extcontextsave(struct extmem_save_s *save)
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{
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DEBUGASSERT(save != NULL);
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save->gpiod_crl = getreg32(STM32_GPIOE_CRL);
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save->gpiod_crh = getreg32(STM32_GPIOE_CRH);
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save->gpioe_crl = getreg32(STM32_GPIOD_CRL);
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save->gpioe_crh = getreg32(STM32_GPIOD_CRH);
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save->gpiof_crl = getreg32(STM32_GPIOF_CRL);
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save->gpiof_crh = getreg32(STM32_GPIOF_CRH);
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save->gpiog_crl = getreg32(STM32_GPIOG_CRL);
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save->gpiog_crh = getreg32(STM32_GPIOG_CRH);
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}
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/************************************************************************************
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* Name: stm32_extcontextrestore
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*
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* Description:
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* Restore GPIOs that were used by external memory configurations
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*
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************************************************************************************/
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void stm32_extcontextrestore(struct extmem_save_s *restore)
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{
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DEBUGASSERT(restore != NULL);
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putreg32(restore->gpiod_crl, STM32_GPIOE_CRL);
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putreg32(restore->gpiod_crh, STM32_GPIOE_CRH);
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putreg32(restore->gpioe_crl, STM32_GPIOD_CRL);
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putreg32(restore->gpioe_crh, STM32_GPIOD_CRH);
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putreg32(restore->gpiof_crl, STM32_GPIOF_CRL);
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putreg32(restore->gpiof_crh, STM32_GPIOF_CRH);
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putreg32(restore->gpiog_crl, STM32_GPIOG_CRL);
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putreg32(restore->gpiog_crh, STM32_GPIOG_CRH);
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}
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#endif /* CONFIG_STM32_FSMC */
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