/**************************************************************************** * boards/arm/imxrt/imxrt1060-evk/src/imxrt_spi.c * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Authors: Ivan Ucherdzhiev * David Sidrane * * 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 #include #include #include #include #include #include #include "up_arch.h" #include "imxrt_config.h" #include "imxrt_lpspi.h" #include "imxrt_gpio.h" #include "imxrt1060-evk.h" #if defined(CONFIG_IMXRT_LPSPI1) || defined(CONFIG_IMXRT_LPSPI2) || \ defined(CONFIG_IMXRT_LPSPI3) || defined(CONFIG_IMXRT_LPSPI4) /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: imxrt_spidev_initialize * * Description: * Called to configure SPI chip select GPIO pins for the imxrt1060-evk * board. * ****************************************************************************/ void weak_function imxrt_spidev_initialize(void) { #ifdef CONFIG_IMXRT_LPSPI1 imxrt_config_gpio(GPIO_LPSPI1_CS); /* LPSPI1 chip select */ imxrt_config_gpio(GPIO_MMCSD_EN); #endif #ifdef CONFIG_IMXRT_LPSPI3 imxrt_config_gpio(GPIO_LPSPI3_CS); /* LPSPI3 chip select */ #endif } /**************************************************************************** * Name: imxrt_lpspi1/2/3select and imxrt_lpspi1/2/3status * * Description: * The external functions, imxrt_lpspi1/2/3select and imxrt_lpspi1/2/3status * must be provided by board-specific logic. * They are implementations of the select and status methods of the SPI * interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h). * All other methods (including imxrt_lpspibus_initialize()) * are provided by common STM32 logic. * To use this common SPI logic on your board: * * 1. Provide logic in imxrt_boardinitialize() to configure SPI chip select * pins. * 2. Provide imxrt_lpspi1/2/3select() and imxrt_lpspi1/2/3status() * 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. Add a calls to imxrt_lpspibus_initialize() in your low level * application initialization logic * 4. The handle returned by imxrt_lpspibus_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_IMXRT_LPSPI1 void imxrt_lpspi1select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); imxrt_gpio_write(GPIO_LPSPI1_CS, !selected); } uint8_t imxrt_lpspi1status(FAR struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif #ifdef CONFIG_IMXRT_LPSPI2 void imxrt_lpspi2select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); imxrt_gpio_write(GPIO_LPSPI2_CS, !selected); } uint8_t imxrt_lpspi2status(FAR struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif #ifdef CONFIG_IMXRT_LPSPI3 void imxrt_lpspi3select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); imxrt_gpio_write(GPIO_LPSPI3_CS, !selected); } uint8_t imxrt_lpspi3status(FAR struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif #ifdef CONFIG_IMXRT_LPSPI4 void imxrt_lpspi4select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); imxrt_gpio_write(GPIO_LPSPI4_CS, !selected); } uint8_t imxrt_lpspi4status(FAR struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif /**************************************************************************** * Name: imxrt_lpspi1cmddata * * Description: * Set or clear the SH1101A A0 or SD1306 D/C n bit to select data (true) * or command (false). This function must be provided by platform-specific * logic. This is an implementation of the cmddata method of the SPI * interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h). * * Input Parameters: * * spi - SPI device that controls the bus the device that requires the CMD/ * DATA selection. * devid - If there are multiple devices on the bus, this selects which one * to select cmd or data. NOTE: This design restricts, for example, * one one SPI display per SPI bus. * cmd - true: select command; false: select data * * Returned Value: * None * ****************************************************************************/ #ifdef CONFIG_SPI_CMDDATA #ifdef CONFIG_IMXRT_LPSPI1 int imxrt_lpspi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) { return -ENODEV; } #endif #ifdef CONFIG_IMXRT_LPSPI2 int imxrt_lpspi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) { return -ENODEV; } #endif #ifdef CONFIG_IMXRT_LPSPI3 int imxrt_lpspi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) { return -ENODEV; } #endif #ifdef CONFIG_IMXRT_LPSPI4 int imxrt_lpspi4cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd) { return -ENODEV; } #endif #endif /* CONFIG_SPI_CMDDATA */ #endif /* CONFIG_IMXRT_LPSPI1 || CONFIG_IMXRT_LPSPI2 */