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/************************************************************************************
* configs/stm3210e-eval/src/up_extcontext.c
* arch/arm/src/board/up_extcontext.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <assert.h>
#include <debug.h>
#include "up_arch.h"
#include "stm32_gpio.h"
#include "stm3210e-internal.h"
#ifdef CONFIG_STM32_FSMC
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#if STM32_NGPIO_PORTS < 6
# error "Required GPIO ports not enabled"
#endif
/************************************************************************************
* Private Data
************************************************************************************/
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: stm32_extcontextsave
*
* Description:
* Save current GPIOs that will used by external memory configurations
*
************************************************************************************/
void stm32_extcontextsave(struct extmem_save_s *save)
{
DEBUGASSERT(save != NULL);
save->gpiod_crl = getreg32(STM32_GPIOE_CRL);
save->gpiod_crh = getreg32(STM32_GPIOE_CRH);
save->gpioe_crl = getreg32(STM32_GPIOD_CRL);
save->gpioe_crh = getreg32(STM32_GPIOD_CRH);
save->gpiof_crl = getreg32(STM32_GPIOF_CRL);
save->gpiof_crh = getreg32(STM32_GPIOF_CRH);
save->gpiog_crl = getreg32(STM32_GPIOG_CRL);
save->gpiog_crh = getreg32(STM32_GPIOG_CRH);
}
/************************************************************************************
* Name: stm32_extcontextrestore
*
* Description:
* Restore GPIOs that were used by external memory configurations
*
************************************************************************************/
void stm32_extcontextrestore(struct extmem_save_s *restore)
{
DEBUGASSERT(restore != NULL);
putreg32(restore->gpiod_crl, STM32_GPIOE_CRL);
putreg32(restore->gpiod_crh, STM32_GPIOE_CRH);
putreg32(restore->gpioe_crl, STM32_GPIOD_CRL);
putreg32(restore->gpioe_crh, STM32_GPIOD_CRH);
putreg32(restore->gpiof_crl, STM32_GPIOF_CRL);
putreg32(restore->gpiof_crh, STM32_GPIOF_CRH);
putreg32(restore->gpiog_crl, STM32_GPIOG_CRL);
putreg32(restore->gpiog_crh, STM32_GPIOG_CRH);
}
#endif /* CONFIG_STM32_FSMC */
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