/************************************************************************************ * arch/arm/src/stm32l4/stm32l4_spi.h * * Copyright (C) 2009, 2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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. * ************************************************************************************/ #ifndef __ARCH_ARM_SRC_STM32L4_STM32L4_SPI_H #define __ARCH_ARM_SRC_STM32L4_STM32L4_SPI_H /************************************************************************************ * Included Files ************************************************************************************/ #include #include "chip.h" #include "chip/stm32l4_spi.h" /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ #ifndef __ASSEMBLY__ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /************************************************************************************ * Public Data ************************************************************************************/ struct spi_dev_s; /************************************************************************************ * Public Functions ************************************************************************************/ /************************************************************************************ * Name: stm32l4_spibus_initialize * * Description: * Initialize the selected SPI bus * * Input Parameter: * bus number (for hardware that has mutiple SPI interfaces) * * Returned Value: * Valid SPI device structure reference on succcess; a NULL on failure * ************************************************************************************/ FAR struct spi_dev_s *stm32l4_spibus_initialize(int bus); /************************************************************************************ * Name: stm32l4_spi1/2/...select and stm32l4_spi1/2/...status * * Description: * The external functions, stm32l4_spi1/2/...select, stm32l4_spi1/2/...status, and * stm32l4_spi1/2/...cmddata must be provided by board-specific logic. These are * implementations of the select, status, and cmddata methods of the SPI interface * defined by struct spi_ops_s (see include/nuttx/spi/spi.h). All other methods * (including stm32l4_spibus_initialize()) are provided by common STM32 logic. To use this * common SPI logic on your board: * * 1. Provide logic in stm32l4_boardinitialize() to configure SPI chip select * pins. * 2. Provide stm32l4_spi1/2/...select() and stm32l4_spi1/2/...status() functions in your * board-specific logic. These functions will perform chip selection and * status operations using GPIOs in the way your board is configured. * 3. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration file, then * provide stm32l4_spi1/2/...cmddata() functions in your board-specific logic. * These functions will perform cmd/data selection operations using GPIOs in the * way your board is configured. * 4. Add a calls to stm32l4_spibus_initialize() in your low level application * initialization logic * 5. The handle returned by stm32l4_spibus_initialize() may then be used to bind the * SPI driver to higher level logic (e.g., calling * mmcsd_spislotinitialize(), for example, will bind the SPI driver to * the SPI MMC/SD driver). * ************************************************************************************/ #ifdef CONFIG_STM32L4_SPI1 void stm32l4_spi1select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected); uint8_t stm32l4_spi1status(FAR struct spi_dev_s *dev, uint32_t devid); int stm32l4_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd); #endif #ifdef CONFIG_STM32L4_SPI2 void stm32l4_spi2select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected); uint8_t stm32l4_spi2status(FAR struct spi_dev_s *dev, uint32_t devid); int stm32l4_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd); #endif #ifdef CONFIG_STM32L4_SPI3 void stm32l4_spi3select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected); uint8_t stm32l4_spi3status(FAR struct spi_dev_s *dev, uint32_t devid); int stm32l4_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd); #endif /************************************************************************************ * Name: stm32l4_spi1/2/...register * * Description: * If the board supports a card detect callback to inform the SPI-based MMC/SD * driver when an SD card is inserted or removed, then CONFIG_SPI_CALLBACK should * be defined and the following function(s) must be implemented. These functions * implements the registercallback method of the SPI interface (see * include/nuttx/spi/spi.h for details) * * Input Parameters: * dev - Device-specific state data * callback - The function to call on the media change * arg - A caller provided value to return with the callback * * Returned Value: * 0 on success; negated errno on failure. * ****************************************************************************/ #ifdef CONFIG_SPI_CALLBACK #ifdef CONFIG_STM32L4_SPI1 int stm32l4_spi1register(FAR struct spi_dev_s *dev, spi_mediachange_t callback, FAR void *arg); #endif #ifdef CONFIG_STM32L4_SPI2 int stm32l4_spi2register(FAR struct spi_dev_s *dev, spi_mediachange_t callback, FAR void *arg); #endif #ifdef CONFIG_STM32L4_SPI3 int stm32l4_spi3register(FAR struct spi_dev_s *dev, spi_mediachange_t callback, FAR void *arg); #endif #endif #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __ARCH_ARM_SRC_STM32L4_STM32L4_SPI_H */