diff options
Diffstat (limited to 'nuttx/configs/stm3210e-eval/src/up_extcontext.c')
| -rw-r--r-- | nuttx/configs/stm3210e-eval/src/up_extcontext.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/nuttx/configs/stm3210e-eval/src/up_extcontext.c b/nuttx/configs/stm3210e-eval/src/up_extcontext.c new file mode 100644 index 000000000..05e6b267f --- /dev/null +++ b/nuttx/configs/stm3210e-eval/src/up_extcontext.c @@ -0,0 +1,117 @@ +/************************************************************************************ + * 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 */ + + |